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adowCameraBottom","shadowCameraVisible","shadowDarkness","shadowMapWidth","shadowMapHeight","dynamic","setDynamic","copyIndicesArray","setArray","addIndex","addDrawCall","clearDrawCalls","computeOffsets","maxInstancedCount","linePrecision","getArrays","addShapeList","wrapAround","overdraw","wrapRGB","metal","transparency","clearTarget","animate","getCurrentRenderTarget","getPrecision","resetGLState","supportsFloatTextures","supportsHalfFloatTextures","supportsStandardDerivatives","supportsCompressedTextureS3TC","supportsCompressedTexturePVRTC","supportsBlendMinMax","supportsInstancedArrays","enableScissorTest","addPrePlugin","addPostPlugin","updateShadowMap","setFaceCulling","allocTextureUnit","setTexture","getActiveMipMapLevel","shadowMapCullFace","vr","gammaInput","gammaOutput","toneMappingWhitePoint","renderReverseSided","renderSingleSided","gain","createGain","connect","getInput","autoplay","detune","loopStart","loopEnd","playbackRate","isPlaying","hasPlaybackControl","sourceType","_startedAt","_progress","_connected","filters","audioNode","mediaElement","createMediaElementSource","mediaStream","createMediaStreamSource","play","delay","currentTime","createBufferSource","onended","onEnded","setDetune","setPlaybackRate","getOutput","setTargetAtTime","getFilters","setFilters","updateCubeMap","loadTextureCube","loadCompressedTexture","loadCompressedTextureCube","revision","__THREE__","URL_REGEX","FIRST_SEGMENT_REGEX","SLASH_DOT_REGEX","SLASH_DOT_DOT_REGEX","URLToolkit","buildAbsoluteURL","baseURL","relativeURL","alwaysNormalize","basePartsForNormalise","parseURL","normalizePath","buildURLFromParts","relativeParts","scheme","baseParts","netLoc","pathParts","builtParts","query","fragment","baseURLPath","newPath","getRandomValues","rnds8","rng","crypto","msCrypto","byteToHex","rnds","addLanguage","_assertThisInitialized","ReferenceError","_setPrototypeOf","setPrototypeOf","_inheritsLoose","subClass","superClass","_isNativeReflectConstruct","Reflect","sham","Proxy","valueOf","_construct","Parent","instance","DEFAULT_LOCATION","relativeUrl","nativeURL","protocolLess","removeLocation","newUrl","URL","Stream","on","off","trigger","_length","pipe","decodeB64ToUint8Array","b64Text","decodedString","Buffer","DESCRIPTORS","LineStream","_Stream","nextNewline","TAB","parseByterange","byterangeString","parseAttributes","ParseStream","customParsers","tagMappers","_this2","acc","mapper","mappedLine","newLine","tagType","number","playlistType","allowed","URI","BYTERANGE","byterange","RESOLUTION","BANDWIDTH","dateTimeString","dateTimeObject","Date","IV","PRECISE","subkey","addParser","_ref","_this3","expression","customType","dataParser","addTagMapper","_ref2","camelCaseKeys","setHoldBack","manifest","serverControl","targetDuration","partTargetDuration","hb","phb","minTargetDuration","minPartDuration","lineStream","parseStream","currentMap","uris","currentUri","hasParts","noop","defaultMediaGroups","currentTimeline","allowCache","discontinuityStarts","lastByterangeEnd","lastPartByterangeEnd","preloadHints","timeline","preloadSegment","entry","mediaGroup","rendition","endlist","endList","inf","mediaSequence","discontinuitySequence","METHOD","KEYFORMAT","contentProtection","KEYID","schemeIdUri","keyId","pssh","iv","playlist","playlists","mediaGroups","TYPE","NAME","mediaGroupType","DEFAULT","autoselect","AUTOSELECT","LANGUAGE","language","instreamId","CHARACTERISTICS","characteristics","FORCED","forced","discontinuity","targetduration","precise","cueOut","cueOutCont","cueIn","skip","warnOnMissingAttributes_","segmentIndex","partIndex","renditionReports","canBlockReload","canSkipDateranges","hint","isPart","otherHint","report","required","partInf","partTarget","custom","missing","chunk","regexs","mp4","webm","ogg","audio","muxerVideo","muxerAudio","muxerText","mediaTypes","upperMediaTypes","translateLegacyCodec","codec","orig","profile","avcLevel","parseCodecs","codecString","codecs","codecType","details","mediaType","isAudioCodec","getMimeForCodec","browserSupportsCodec","muxerSupportsCodec","DEFAULT_AUDIO_CODEC","MPEGURL_REGEX","DASH_REGEX","simpleTypeFromSourceType","findIndex","matchingFunction","urlTypeToSegment","_ref$baseUrl","_ref$source","_ref$range","_ref$indexRange","indexRange","resolvedUri","ranges","startRange","endRange","parseEndNumber","endNumber","segmentRange","static","_attributes$timescale","sourceDuration","periodDuration","segmentDuration","NOW","clientOffset","availabilityStartTime","_attributes$timescale2","_attributes$periodSta","periodStart","_attributes$minimumUp","minimumUpdatePeriod","_attributes$timeShift","timeShiftBufferDepth","periodStartWC","segmentCount","availableStart","availableEnd","parseByDuration","_attributes$timescale4","_segmentRange$type","_attributes$timescale3","_attributes$startNumb","startNumber","toSegments","sectionDuration","segmentsFromBase","_attributes$initializ","initialization","_attributes$indexRang","presentationTime","_attributes$number","initSegment","sourceURL","seg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_extends() {\n  module.exports = _extends = Object.assign || function (target) {\n    for (var i = 1; i < arguments.length; i++) {\n      var source = arguments[i];\n\n      for (var key in source) {\n        if (Object.prototype.hasOwnProperty.call(source, key)) {\n          target[key] = source[key];\n        }\n      }\n    }\n\n    return target;\n  };\n\n  module.exports[\"default\"] = module.exports, module.exports.__esModule = true;\n  return _extends.apply(this, arguments);\n}\n\nmodule.exports = _extends;\nmodule.exports[\"default\"] = module.exports, module.exports.__esModule = true;","\"use strict\";\n\nvar window = require('global/window');\n\nvar httpResponseHandler = function httpResponseHandler(callback, decodeResponseBody) {\n  if (decodeResponseBody === void 0) {\n    decodeResponseBody = false;\n  }\n\n  return function (err, response, responseBody) {\n    // if the XHR failed, return that error\n    if (err) {\n      callback(err);\n      return;\n    } // if the HTTP status code is 4xx or 5xx, the request also failed\n\n\n    if (response.statusCode >= 400 && response.statusCode <= 599) {\n      var cause = responseBody;\n\n      if (decodeResponseBody) {\n        if (window.TextDecoder) {\n          var charset = getCharset(response.headers && response.headers['content-type']);\n\n          try {\n            cause = new TextDecoder(charset).decode(responseBody);\n          } catch (e) {}\n        } else {\n          cause = String.fromCharCode.apply(null, new Uint8Array(responseBody));\n        }\n      }\n\n      callback({\n        cause: cause\n      });\n      return;\n    } // otherwise, request succeeded\n\n\n    callback(null, responseBody);\n  };\n};\n\nfunction getCharset(contentTypeHeader) {\n  if (contentTypeHeader === void 0) {\n    contentTypeHeader = '';\n  }\n\n  return contentTypeHeader.toLowerCase().split(';').reduce(function (charset, contentType) {\n    var _contentType$split = contentType.split('='),\n        type = _contentType$split[0],\n        value = _contentType$split[1];\n\n    if (type.trim() === 'charset') {\n      return value.trim();\n    }\n\n    return charset;\n  }, 'utf-8');\n}\n\nmodule.exports = httpResponseHandler;","\"use strict\";\n\nvar window = require(\"global/window\");\n\nvar _extends = require(\"@babel/runtime/helpers/extends\");\n\nvar isFunction = require('is-function');\n\ncreateXHR.httpHandler = require('./http-handler.js');\n/**\n * @license\n * slighly modified parse-headers 2.0.2 <https://github.com/kesla/parse-headers/>\n * Copyright (c) 2014 David Björklund\n * Available under the MIT license\n * <https://github.com/kesla/parse-headers/blob/master/LICENCE>\n */\n\nvar parseHeaders = function parseHeaders(headers) {\n  var result = {};\n\n  if (!headers) {\n    return result;\n  }\n\n  headers.trim().split('\\n').forEach(function (row) {\n    var index = row.indexOf(':');\n    var key = row.slice(0, index).trim().toLowerCase();\n    var value = row.slice(index + 1).trim();\n\n    if (typeof result[key] === 'undefined') {\n      result[key] = value;\n    } else if (Array.isArray(result[key])) {\n      result[key].push(value);\n    } else {\n      result[key] = [result[key], value];\n    }\n  });\n  return result;\n};\n\nmodule.exports = createXHR; // Allow use of default import syntax in TypeScript\n\nmodule.exports.default = createXHR;\ncreateXHR.XMLHttpRequest = window.XMLHttpRequest || noop;\ncreateXHR.XDomainRequest = \"withCredentials\" in new createXHR.XMLHttpRequest() ? createXHR.XMLHttpRequest : window.XDomainRequest;\nforEachArray([\"get\", \"put\", \"post\", \"patch\", \"head\", \"delete\"], function (method) {\n  createXHR[method === \"delete\" ? \"del\" : method] = function (uri, options, callback) {\n    options = initParams(uri, options, callback);\n    options.method = method.toUpperCase();\n    return _createXHR(options);\n  };\n});\n\nfunction forEachArray(array, iterator) {\n  for (var i = 0; i < array.length; i++) {\n    iterator(array[i]);\n  }\n}\n\nfunction isEmpty(obj) {\n  for (var i in obj) {\n    if (obj.hasOwnProperty(i)) return false;\n  }\n\n  return true;\n}\n\nfunction initParams(uri, options, callback) {\n  var params = uri;\n\n  if (isFunction(options)) {\n    callback = options;\n\n    if (typeof uri === \"string\") {\n      params = {\n        uri: uri\n      };\n    }\n  } else {\n    params = _extends({}, options, {\n      uri: uri\n    });\n  }\n\n  params.callback = callback;\n  return params;\n}\n\nfunction createXHR(uri, options, callback) {\n  options = initParams(uri, options, callback);\n  return _createXHR(options);\n}\n\nfunction _createXHR(options) {\n  if (typeof options.callback === \"undefined\") {\n    throw new Error(\"callback argument missing\");\n  }\n\n  var called = false;\n\n  var callback = function cbOnce(err, response, body) {\n    if (!called) {\n      called = true;\n      options.callback(err, response, body);\n    }\n  };\n\n  function readystatechange() {\n    if (xhr.readyState === 4) {\n      setTimeout(loadFunc, 0);\n    }\n  }\n\n  function getBody() {\n    // Chrome with requestType=blob throws errors arround when even testing access to responseText\n    var body = undefined;\n\n    if (xhr.response) {\n      body = xhr.response;\n    } else {\n      body = xhr.responseText || getXml(xhr);\n    }\n\n    if (isJson) {\n      try {\n        body = JSON.parse(body);\n      } catch (e) {}\n    }\n\n    return body;\n  }\n\n  function errorFunc(evt) {\n    clearTimeout(timeoutTimer);\n\n    if (!(evt instanceof Error)) {\n      evt = new Error(\"\" + (evt || \"Unknown XMLHttpRequest Error\"));\n    }\n\n    evt.statusCode = 0;\n    return callback(evt, failureResponse);\n  } // will load the data & process the response in a special response object\n\n\n  function loadFunc() {\n    if (aborted) return;\n    var status;\n    clearTimeout(timeoutTimer);\n\n    if (options.useXDR && xhr.status === undefined) {\n      //IE8 CORS GET successful response doesn't have a status field, but body is fine\n      status = 200;\n    } else {\n      status = xhr.status === 1223 ? 204 : xhr.status;\n    }\n\n    var response = failureResponse;\n    var err = null;\n\n    if (status !== 0) {\n      response = {\n        body: getBody(),\n        statusCode: status,\n        method: method,\n        headers: {},\n        url: uri,\n        rawRequest: xhr\n      };\n\n      if (xhr.getAllResponseHeaders) {\n        //remember xhr can in fact be XDR for CORS in IE\n        response.headers = parseHeaders(xhr.getAllResponseHeaders());\n      }\n    } else {\n      err = new Error(\"Internal XMLHttpRequest Error\");\n    }\n\n    return callback(err, response, response.body);\n  }\n\n  var xhr = options.xhr || null;\n\n  if (!xhr) {\n    if (options.cors || options.useXDR) {\n      xhr = new createXHR.XDomainRequest();\n    } else {\n      xhr = new createXHR.XMLHttpRequest();\n    }\n  }\n\n  var key;\n  var aborted;\n  var uri = xhr.url = options.uri || options.url;\n  var method = xhr.method = options.method || \"GET\";\n  var body = options.body || options.data;\n  var headers = xhr.headers = options.headers || {};\n  var sync = !!options.sync;\n  var isJson = false;\n  var timeoutTimer;\n  var failureResponse = {\n    body: undefined,\n    headers: {},\n    statusCode: 0,\n    method: method,\n    url: uri,\n    rawRequest: xhr\n  };\n\n  if (\"json\" in options && options.json !== false) {\n    isJson = true;\n    headers[\"accept\"] || headers[\"Accept\"] || (headers[\"Accept\"] = \"application/json\"); //Don't override existing accept header declared by user\n\n    if (method !== \"GET\" && method !== \"HEAD\") {\n      headers[\"content-type\"] || headers[\"Content-Type\"] || (headers[\"Content-Type\"] = \"application/json\"); //Don't override existing accept header declared by user\n\n      body = JSON.stringify(options.json === true ? body : options.json);\n    }\n  }\n\n  xhr.onreadystatechange = readystatechange;\n  xhr.onload = loadFunc;\n  xhr.onerror = errorFunc; // IE9 must have onprogress be set to a unique function.\n\n  xhr.onprogress = function () {// IE must die\n  };\n\n  xhr.onabort = function () {\n    aborted = true;\n  };\n\n  xhr.ontimeout = errorFunc;\n  xhr.open(method, uri, !sync, options.username, options.password); //has to be after open\n\n  if (!sync) {\n    xhr.withCredentials = !!options.withCredentials;\n  } // Cannot set timeout with sync request\n  // not setting timeout on the xhr object, because of old webkits etc. not handling that correctly\n  // both npm's request and jquery 1.x use this kind of timeout, so this is being consistent\n\n\n  if (!sync && options.timeout > 0) {\n    timeoutTimer = setTimeout(function () {\n      if (aborted) return;\n      aborted = true; //IE9 may still call readystatechange\n\n      xhr.abort(\"timeout\");\n      var e = new Error(\"XMLHttpRequest timeout\");\n      e.code = \"ETIMEDOUT\";\n      errorFunc(e);\n    }, options.timeout);\n  }\n\n  if (xhr.setRequestHeader) {\n    for (key in headers) {\n      if (headers.hasOwnProperty(key)) {\n        xhr.setRequestHeader(key, headers[key]);\n      }\n    }\n  } else if (options.headers && !isEmpty(options.headers)) {\n    throw new Error(\"Headers cannot be set on an XDomainRequest object\");\n  }\n\n  if (\"responseType\" in options) {\n    xhr.responseType = options.responseType;\n  }\n\n  if (\"beforeSend\" in options && typeof options.beforeSend === \"function\") {\n    options.beforeSend(xhr);\n  } // Microsoft Edge browser sends \"undefined\" when send is called with undefined value.\n  // XMLHttpRequest spec says to pass null as body to indicate no body\n  // See https://github.com/naugtur/xhr/issues/100.\n\n\n  xhr.send(body || null);\n  return xhr;\n}\n\nfunction getXml(xhr) {\n  // xhr.responseXML will throw Exception \"InvalidStateError\" or \"DOMException\"\n  // See https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/responseXML.\n  try {\n    if (xhr.responseType === \"document\") {\n      return xhr.responseXML;\n    }\n\n    var firefoxBugTakenEffect = xhr.responseXML && xhr.responseXML.documentElement.nodeName === \"parsererror\";\n\n    if (xhr.responseType === \"\" && !firefoxBugTakenEffect) {\n      return xhr.responseXML;\n    }\n  } catch (e) {}\n\n  return null;\n}\n\nfunction noop() {}","'use strict'\n\n/**\n * \"Shallow freezes\" an object to render it immutable.\n * Uses `Object.freeze` if available,\n * otherwise the immutability is only in the type.\n *\n * Is used to create \"enum like\" objects.\n *\n * @template T\n * @param {T} object the object to freeze\n * @param {Pick<ObjectConstructor, 'freeze'> = Object} oc `Object` by default,\n * \t\t\t\tallows to inject custom object constructor for tests\n * @returns {Readonly<T>}\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/freeze\n */\nfunction freeze(object, oc) {\n\tif (oc === undefined) {\n\t\toc = Object\n\t}\n\treturn oc && typeof oc.freeze === 'function' ? oc.freeze(object) : object\n}\n\n/**\n * All mime types that are allowed as input to `DOMParser.parseFromString`\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMParser/parseFromString#Argument02 MDN\n * @see https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#domparsersupportedtype WHATWG HTML Spec\n * @see DOMParser.prototype.parseFromString\n */\nvar MIME_TYPE = freeze({\n\t/**\n\t * `text/html`, the only mime type that triggers treating an XML document as HTML.\n\t *\n\t * @see DOMParser.SupportedType.isHTML\n\t * @see https://www.iana.org/assignments/media-types/text/html IANA MimeType registration\n\t * @see https://en.wikipedia.org/wiki/HTML Wikipedia\n\t * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMParser/parseFromString MDN\n\t * @see https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#dom-domparser-parsefromstring WHATWG HTML Spec\n\t */\n\tHTML: 'text/html',\n\n\t/**\n\t * Helper method to check a mime type if it indicates an HTML document\n\t *\n\t * @param {string} [value]\n\t * @returns {boolean}\n\t *\n\t * @see https://www.iana.org/assignments/media-types/text/html IANA MimeType registration\n\t * @see https://en.wikipedia.org/wiki/HTML Wikipedia\n\t * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMParser/parseFromString MDN\n\t * @see https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#dom-domparser-parsefromstring \t */\n\tisHTML: function (value) {\n\t\treturn value === MIME_TYPE.HTML\n\t},\n\n\t/**\n\t * `application/xml`, the standard mime type for XML documents.\n\t *\n\t * @see https://www.iana.org/assignments/media-types/application/xml IANA MimeType registration\n\t * @see https://tools.ietf.org/html/rfc7303#section-9.1 RFC 7303\n\t * @see https://en.wikipedia.org/wiki/XML_and_MIME Wikipedia\n\t */\n\tXML_APPLICATION: 'application/xml',\n\n\t/**\n\t * `text/html`, an alias for `application/xml`.\n\t *\n\t * @see https://tools.ietf.org/html/rfc7303#section-9.2 RFC 7303\n\t * @see https://www.iana.org/assignments/media-types/text/xml IANA MimeType registration\n\t * @see https://en.wikipedia.org/wiki/XML_and_MIME Wikipedia\n\t */\n\tXML_TEXT: 'text/xml',\n\n\t/**\n\t * `application/xhtml+xml`, indicates an XML document that has the default HTML namespace,\n\t * but is parsed as an XML document.\n\t *\n\t * @see https://www.iana.org/assignments/media-types/application/xhtml+xml IANA MimeType registration\n\t * @see https://dom.spec.whatwg.org/#dom-domimplementation-createdocument WHATWG DOM Spec\n\t * @see https://en.wikipedia.org/wiki/XHTML Wikipedia\n\t */\n\tXML_XHTML_APPLICATION: 'application/xhtml+xml',\n\n\t/**\n\t * `image/svg+xml`,\n\t *\n\t * @see https://www.iana.org/assignments/media-types/image/svg+xml IANA MimeType registration\n\t * @see https://www.w3.org/TR/SVG11/ W3C SVG 1.1\n\t * @see https://en.wikipedia.org/wiki/Scalable_Vector_Graphics Wikipedia\n\t */\n\tXML_SVG_IMAGE: 'image/svg+xml',\n})\n\n/**\n * Namespaces that are used in this code base.\n *\n * @see http://www.w3.org/TR/REC-xml-names\n */\nvar NAMESPACE = freeze({\n\t/**\n\t * The XHTML namespace.\n\t *\n\t * @see http://www.w3.org/1999/xhtml\n\t */\n\tHTML: 'http://www.w3.org/1999/xhtml',\n\n\t/**\n\t * Checks if `uri` equals `NAMESPACE.HTML`.\n\t *\n\t * @param {string} [uri]\n\t *\n\t * @see NAMESPACE.HTML\n\t */\n\tisHTML: function (uri) {\n\t\treturn uri === NAMESPACE.HTML\n\t},\n\n\t/**\n\t * The SVG namespace.\n\t *\n\t * @see http://www.w3.org/2000/svg\n\t */\n\tSVG: 'http://www.w3.org/2000/svg',\n\n\t/**\n\t * The `xml:` namespace.\n\t *\n\t * @see http://www.w3.org/XML/1998/namespace\n\t */\n\tXML: 'http://www.w3.org/XML/1998/namespace',\n\n\t/**\n\t * The `xmlns:` namespace\n\t *\n\t * @see https://www.w3.org/2000/xmlns/\n\t */\n\tXMLNS: 'http://www.w3.org/2000/xmlns/',\n})\n\nexports.freeze = freeze;\nexports.MIME_TYPE = MIME_TYPE;\nexports.NAMESPACE = NAMESPACE;\n","var conventions = require(\"./conventions\");\nvar dom = require('./dom')\nvar entities = require('./entities');\nvar sax = require('./sax');\n\nvar DOMImplementation = dom.DOMImplementation;\n\nvar NAMESPACE = conventions.NAMESPACE;\n\nvar ParseError = sax.ParseError;\nvar XMLReader = sax.XMLReader;\n\nfunction DOMParser(options){\n\tthis.options = options ||{locator:{}};\n}\n\nDOMParser.prototype.parseFromString = function(source,mimeType){\n\tvar options = this.options;\n\tvar sax =  new XMLReader();\n\tvar domBuilder = options.domBuilder || new DOMHandler();//contentHandler and LexicalHandler\n\tvar errorHandler = options.errorHandler;\n\tvar locator = options.locator;\n\tvar defaultNSMap = options.xmlns||{};\n\tvar isHTML = /\\/x?html?$/.test(mimeType);//mimeType.toLowerCase().indexOf('html') > -1;\n  \tvar entityMap = isHTML ? entities.HTML_ENTITIES : entities.XML_ENTITIES;\n\tif(locator){\n\t\tdomBuilder.setDocumentLocator(locator)\n\t}\n\n\tsax.errorHandler = buildErrorHandler(errorHandler,domBuilder,locator);\n\tsax.domBuilder = options.domBuilder || domBuilder;\n\tif(isHTML){\n\t\tdefaultNSMap[''] = NAMESPACE.HTML;\n\t}\n\tdefaultNSMap.xml = defaultNSMap.xml || NAMESPACE.XML;\n\tif(source && typeof source === 'string'){\n\t\tsax.parse(source,defaultNSMap,entityMap);\n\t}else{\n\t\tsax.errorHandler.error(\"invalid doc source\");\n\t}\n\treturn domBuilder.doc;\n}\nfunction buildErrorHandler(errorImpl,domBuilder,locator){\n\tif(!errorImpl){\n\t\tif(domBuilder instanceof DOMHandler){\n\t\t\treturn domBuilder;\n\t\t}\n\t\terrorImpl = domBuilder ;\n\t}\n\tvar errorHandler = {}\n\tvar isCallback = errorImpl instanceof Function;\n\tlocator = locator||{}\n\tfunction build(key){\n\t\tvar fn = errorImpl[key];\n\t\tif(!fn && isCallback){\n\t\t\tfn = errorImpl.length == 2?function(msg){errorImpl(key,msg)}:errorImpl;\n\t\t}\n\t\terrorHandler[key] = fn && function(msg){\n\t\t\tfn('[xmldom '+key+']\\t'+msg+_locator(locator));\n\t\t}||function(){};\n\t}\n\tbuild('warning');\n\tbuild('error');\n\tbuild('fatalError');\n\treturn errorHandler;\n}\n\n//console.log('#\\n\\n\\n\\n\\n\\n\\n####')\n/**\n * +ContentHandler+ErrorHandler\n * +LexicalHandler+EntityResolver2\n * -DeclHandler-DTDHandler\n *\n * DefaultHandler:EntityResolver, DTDHandler, ContentHandler, ErrorHandler\n * DefaultHandler2:DefaultHandler,LexicalHandler, DeclHandler, EntityResolver2\n * @link http://www.saxproject.org/apidoc/org/xml/sax/helpers/DefaultHandler.html\n */\nfunction DOMHandler() {\n    this.cdata = false;\n}\nfunction position(locator,node){\n\tnode.lineNumber = locator.lineNumber;\n\tnode.columnNumber = locator.columnNumber;\n}\n/**\n * @see org.xml.sax.ContentHandler#startDocument\n * @link http://www.saxproject.org/apidoc/org/xml/sax/ContentHandler.html\n */\nDOMHandler.prototype = {\n\tstartDocument : function() {\n    \tthis.doc = new DOMImplementation().createDocument(null, null, null);\n    \tif (this.locator) {\n        \tthis.doc.documentURI = this.locator.systemId;\n    \t}\n\t},\n\tstartElement:function(namespaceURI, localName, qName, attrs) {\n\t\tvar doc = this.doc;\n\t    var el = doc.createElementNS(namespaceURI, qName||localName);\n\t    var len = attrs.length;\n\t    appendElement(this, el);\n\t    this.currentElement = el;\n\n\t\tthis.locator && position(this.locator,el)\n\t    for (var i = 0 ; i < len; i++) {\n\t        var namespaceURI = attrs.getURI(i);\n\t        var value = attrs.getValue(i);\n\t        var qName = attrs.getQName(i);\n\t\t\tvar attr = doc.createAttributeNS(namespaceURI, qName);\n\t\t\tthis.locator &&position(attrs.getLocator(i),attr);\n\t\t\tattr.value = attr.nodeValue = value;\n\t\t\tel.setAttributeNode(attr)\n\t    }\n\t},\n\tendElement:function(namespaceURI, localName, qName) {\n\t\tvar current = this.currentElement\n\t\tvar tagName = current.tagName;\n\t\tthis.currentElement = current.parentNode;\n\t},\n\tstartPrefixMapping:function(prefix, uri) {\n\t},\n\tendPrefixMapping:function(prefix) {\n\t},\n\tprocessingInstruction:function(target, data) {\n\t    var ins = this.doc.createProcessingInstruction(target, data);\n\t    this.locator && position(this.locator,ins)\n\t    appendElement(this, ins);\n\t},\n\tignorableWhitespace:function(ch, start, length) {\n\t},\n\tcharacters:function(chars, start, length) {\n\t\tchars = _toString.apply(this,arguments)\n\t\t//console.log(chars)\n\t\tif(chars){\n\t\t\tif (this.cdata) {\n\t\t\t\tvar charNode = this.doc.createCDATASection(chars);\n\t\t\t} else {\n\t\t\t\tvar charNode = this.doc.createTextNode(chars);\n\t\t\t}\n\t\t\tif(this.currentElement){\n\t\t\t\tthis.currentElement.appendChild(charNode);\n\t\t\t}else if(/^\\s*$/.test(chars)){\n\t\t\t\tthis.doc.appendChild(charNode);\n\t\t\t\t//process xml\n\t\t\t}\n\t\t\tthis.locator && position(this.locator,charNode)\n\t\t}\n\t},\n\tskippedEntity:function(name) {\n\t},\n\tendDocument:function() {\n\t\tthis.doc.normalize();\n\t},\n\tsetDocumentLocator:function (locator) {\n\t    if(this.locator = locator){// && !('lineNumber' in locator)){\n\t    \tlocator.lineNumber = 0;\n\t    }\n\t},\n\t//LexicalHandler\n\tcomment:function(chars, start, length) {\n\t\tchars = _toString.apply(this,arguments)\n\t    var comm = this.doc.createComment(chars);\n\t    this.locator && position(this.locator,comm)\n\t    appendElement(this, comm);\n\t},\n\n\tstartCDATA:function() {\n\t    //used in characters() methods\n\t    this.cdata = true;\n\t},\n\tendCDATA:function() {\n\t    this.cdata = false;\n\t},\n\n\tstartDTD:function(name, publicId, systemId) {\n\t\tvar impl = this.doc.implementation;\n\t    if (impl && impl.createDocumentType) {\n\t        var dt = impl.createDocumentType(name, publicId, systemId);\n\t        this.locator && position(this.locator,dt)\n\t        appendElement(this, dt);\n\t\t\t\t\tthis.doc.doctype = dt;\n\t    }\n\t},\n\t/**\n\t * @see org.xml.sax.ErrorHandler\n\t * @link http://www.saxproject.org/apidoc/org/xml/sax/ErrorHandler.html\n\t */\n\twarning:function(error) {\n\t\tconsole.warn('[xmldom warning]\\t'+error,_locator(this.locator));\n\t},\n\terror:function(error) {\n\t\tconsole.error('[xmldom error]\\t'+error,_locator(this.locator));\n\t},\n\tfatalError:function(error) {\n\t\tthrow new ParseError(error, this.locator);\n\t}\n}\nfunction _locator(l){\n\tif(l){\n\t\treturn '\\n@'+(l.systemId ||'')+'#[line:'+l.lineNumber+',col:'+l.columnNumber+']'\n\t}\n}\nfunction _toString(chars,start,length){\n\tif(typeof chars == 'string'){\n\t\treturn chars.substr(start,length)\n\t}else{//java sax connect width xmldom on rhino(what about: \"? && !(chars instanceof String)\")\n\t\tif(chars.length >= start+length || start){\n\t\t\treturn new java.lang.String(chars,start,length)+'';\n\t\t}\n\t\treturn chars;\n\t}\n}\n\n/*\n * @link http://www.saxproject.org/apidoc/org/xml/sax/ext/LexicalHandler.html\n * used method of org.xml.sax.ext.LexicalHandler:\n *  #comment(chars, start, length)\n *  #startCDATA()\n *  #endCDATA()\n *  #startDTD(name, publicId, systemId)\n *\n *\n * IGNORED method of org.xml.sax.ext.LexicalHandler:\n *  #endDTD()\n *  #startEntity(name)\n *  #endEntity(name)\n *\n *\n * @link http://www.saxproject.org/apidoc/org/xml/sax/ext/DeclHandler.html\n * IGNORED method of org.xml.sax.ext.DeclHandler\n * \t#attributeDecl(eName, aName, type, mode, value)\n *  #elementDecl(name, model)\n *  #externalEntityDecl(name, publicId, systemId)\n *  #internalEntityDecl(name, value)\n * @link http://www.saxproject.org/apidoc/org/xml/sax/ext/EntityResolver2.html\n * IGNORED method of org.xml.sax.EntityResolver2\n *  #resolveEntity(String name,String publicId,String baseURI,String systemId)\n *  #resolveEntity(publicId, systemId)\n *  #getExternalSubset(name, baseURI)\n * @link http://www.saxproject.org/apidoc/org/xml/sax/DTDHandler.html\n * IGNORED method of org.xml.sax.DTDHandler\n *  #notationDecl(name, publicId, systemId) {};\n *  #unparsedEntityDecl(name, publicId, systemId, notationName) {};\n */\n\"endDTD,startEntity,endEntity,attributeDecl,elementDecl,externalEntityDecl,internalEntityDecl,resolveEntity,getExternalSubset,notationDecl,unparsedEntityDecl\".replace(/\\w+/g,function(key){\n\tDOMHandler.prototype[key] = function(){return null}\n})\n\n/* Private static helpers treated below as private instance methods, so don't need to add these to the public API; we might use a Relator to also get rid of non-standard public properties */\nfunction appendElement (hander,node) {\n    if (!hander.currentElement) {\n        hander.doc.appendChild(node);\n    } else {\n        hander.currentElement.appendChild(node);\n    }\n}//appendChild and setAttributeNS are preformance key\n\nexports.__DOMHandler = DOMHandler;\nexports.DOMParser = DOMParser;\n\n/**\n * @deprecated Import/require from main entry point instead\n */\nexports.DOMImplementation = dom.DOMImplementation;\n\n/**\n * @deprecated Import/require from main entry point instead\n */\nexports.XMLSerializer = dom.XMLSerializer;\n","var conventions = require(\"./conventions\");\n\nvar NAMESPACE = conventions.NAMESPACE;\n\n/**\n * A prerequisite for `[].filter`, to drop elements that are empty\n * @param {string} input\n * @returns {boolean}\n */\nfunction notEmptyString (input) {\n\treturn input !== ''\n}\n/**\n * @see https://infra.spec.whatwg.org/#split-on-ascii-whitespace\n * @see https://infra.spec.whatwg.org/#ascii-whitespace\n *\n * @param {string} input\n * @returns {string[]} (can be empty)\n */\nfunction splitOnASCIIWhitespace(input) {\n\t// U+0009 TAB, U+000A LF, U+000C FF, U+000D CR, U+0020 SPACE\n\treturn input ? input.split(/[\\t\\n\\f\\r ]+/).filter(notEmptyString) : []\n}\n\n/**\n * Adds element as a key to current if it is not already present.\n *\n * @param {Record<string, boolean | undefined>} current\n * @param {string} element\n * @returns {Record<string, boolean | undefined>}\n */\nfunction orderedSetReducer (current, element) {\n\tif (!current.hasOwnProperty(element)) {\n\t\tcurrent[element] = true;\n\t}\n\treturn current;\n}\n\n/**\n * @see https://infra.spec.whatwg.org/#ordered-set\n * @param {string} input\n * @returns {string[]}\n */\nfunction toOrderedSet(input) {\n\tif (!input) return [];\n\tvar list = splitOnASCIIWhitespace(input);\n\treturn Object.keys(list.reduce(orderedSetReducer, {}))\n}\n\n/**\n * Uses `list.indexOf` to implement something like `Array.prototype.includes`,\n * which we can not rely on being available.\n *\n * @param {any[]} list\n * @returns {function(any): boolean}\n */\nfunction arrayIncludes (list) {\n\treturn function(element) {\n\t\treturn list && list.indexOf(element) !== -1;\n\t}\n}\n\nfunction copy(src,dest){\n\tfor(var p in src){\n\t\tdest[p] = src[p];\n\t}\n}\n\n/**\n^\\w+\\.prototype\\.([_\\w]+)\\s*=\\s*((?:.*\\{\\s*?[\\r\\n][\\s\\S]*?^})|\\S.*?(?=[;\\r\\n]));?\n^\\w+\\.prototype\\.([_\\w]+)\\s*=\\s*(\\S.*?(?=[;\\r\\n]));?\n */\nfunction _extends(Class,Super){\n\tvar pt = Class.prototype;\n\tif(!(pt instanceof Super)){\n\t\tfunction t(){};\n\t\tt.prototype = Super.prototype;\n\t\tt = new t();\n\t\tcopy(pt,t);\n\t\tClass.prototype = pt = t;\n\t}\n\tif(pt.constructor != Class){\n\t\tif(typeof Class != 'function'){\n\t\t\tconsole.error(\"unknown Class:\"+Class)\n\t\t}\n\t\tpt.constructor = Class\n\t}\n}\n\n// Node Types\nvar NodeType = {}\nvar ELEMENT_NODE                = NodeType.ELEMENT_NODE                = 1;\nvar ATTRIBUTE_NODE              = NodeType.ATTRIBUTE_NODE              = 2;\nvar TEXT_NODE                   = NodeType.TEXT_NODE                   = 3;\nvar CDATA_SECTION_NODE          = NodeType.CDATA_SECTION_NODE          = 4;\nvar ENTITY_REFERENCE_NODE       = NodeType.ENTITY_REFERENCE_NODE       = 5;\nvar ENTITY_NODE                 = NodeType.ENTITY_NODE                 = 6;\nvar PROCESSING_INSTRUCTION_NODE = NodeType.PROCESSING_INSTRUCTION_NODE = 7;\nvar COMMENT_NODE                = NodeType.COMMENT_NODE                = 8;\nvar DOCUMENT_NODE               = NodeType.DOCUMENT_NODE               = 9;\nvar DOCUMENT_TYPE_NODE          = NodeType.DOCUMENT_TYPE_NODE          = 10;\nvar DOCUMENT_FRAGMENT_NODE      = NodeType.DOCUMENT_FRAGMENT_NODE      = 11;\nvar NOTATION_NODE               = NodeType.NOTATION_NODE               = 12;\n\n// ExceptionCode\nvar ExceptionCode = {}\nvar ExceptionMessage = {};\nvar INDEX_SIZE_ERR              = ExceptionCode.INDEX_SIZE_ERR              = ((ExceptionMessage[1]=\"Index size error\"),1);\nvar DOMSTRING_SIZE_ERR          = ExceptionCode.DOMSTRING_SIZE_ERR          = ((ExceptionMessage[2]=\"DOMString size error\"),2);\nvar HIERARCHY_REQUEST_ERR       = ExceptionCode.HIERARCHY_REQUEST_ERR       = ((ExceptionMessage[3]=\"Hierarchy request error\"),3);\nvar WRONG_DOCUMENT_ERR          = ExceptionCode.WRONG_DOCUMENT_ERR          = ((ExceptionMessage[4]=\"Wrong document\"),4);\nvar INVALID_CHARACTER_ERR       = ExceptionCode.INVALID_CHARACTER_ERR       = ((ExceptionMessage[5]=\"Invalid character\"),5);\nvar NO_DATA_ALLOWED_ERR         = ExceptionCode.NO_DATA_ALLOWED_ERR         = ((ExceptionMessage[6]=\"No data allowed\"),6);\nvar NO_MODIFICATION_ALLOWED_ERR = ExceptionCode.NO_MODIFICATION_ALLOWED_ERR = ((ExceptionMessage[7]=\"No modification allowed\"),7);\nvar NOT_FOUND_ERR               = ExceptionCode.NOT_FOUND_ERR               = ((ExceptionMessage[8]=\"Not found\"),8);\nvar NOT_SUPPORTED_ERR           = ExceptionCode.NOT_SUPPORTED_ERR           = ((ExceptionMessage[9]=\"Not supported\"),9);\nvar INUSE_ATTRIBUTE_ERR         = ExceptionCode.INUSE_ATTRIBUTE_ERR         = ((ExceptionMessage[10]=\"Attribute in use\"),10);\n//level2\nvar INVALID_STATE_ERR        \t= ExceptionCode.INVALID_STATE_ERR        \t= ((ExceptionMessage[11]=\"Invalid state\"),11);\nvar SYNTAX_ERR               \t= ExceptionCode.SYNTAX_ERR               \t= ((ExceptionMessage[12]=\"Syntax error\"),12);\nvar INVALID_MODIFICATION_ERR \t= ExceptionCode.INVALID_MODIFICATION_ERR \t= ((ExceptionMessage[13]=\"Invalid modification\"),13);\nvar NAMESPACE_ERR            \t= ExceptionCode.NAMESPACE_ERR           \t= ((ExceptionMessage[14]=\"Invalid namespace\"),14);\nvar INVALID_ACCESS_ERR       \t= ExceptionCode.INVALID_ACCESS_ERR      \t= ((ExceptionMessage[15]=\"Invalid access\"),15);\n\n/**\n * DOM Level 2\n * Object DOMException\n * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/ecma-script-binding.html\n * @see http://www.w3.org/TR/REC-DOM-Level-1/ecma-script-language-binding.html\n */\nfunction DOMException(code, message) {\n\tif(message instanceof Error){\n\t\tvar error = message;\n\t}else{\n\t\terror = this;\n\t\tError.call(this, ExceptionMessage[code]);\n\t\tthis.message = ExceptionMessage[code];\n\t\tif(Error.captureStackTrace) Error.captureStackTrace(this, DOMException);\n\t}\n\terror.code = code;\n\tif(message) this.message = this.message + \": \" + message;\n\treturn error;\n};\nDOMException.prototype = Error.prototype;\ncopy(ExceptionCode,DOMException)\n\n/**\n * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/core.html#ID-536297177\n * The NodeList interface provides the abstraction of an ordered collection of nodes, without defining or constraining how this collection is implemented. NodeList objects in the DOM are live.\n * The items in the NodeList are accessible via an integral index, starting from 0.\n */\nfunction NodeList() {\n};\nNodeList.prototype = {\n\t/**\n\t * The number of nodes in the list. The range of valid child node indices is 0 to length-1 inclusive.\n\t * @standard level1\n\t */\n\tlength:0, \n\t/**\n\t * Returns the indexth item in the collection. If index is greater than or equal to the number of nodes in the list, this returns null.\n\t * @standard level1\n\t * @param index  unsigned long \n\t *   Index into the collection.\n\t * @return Node\n\t * \tThe node at the indexth position in the NodeList, or null if that is not a valid index. \n\t */\n\titem: function(index) {\n\t\treturn this[index] || null;\n\t},\n\ttoString:function(isHTML,nodeFilter){\n\t\tfor(var buf = [], i = 0;i<this.length;i++){\n\t\t\tserializeToString(this[i],buf,isHTML,nodeFilter);\n\t\t}\n\t\treturn buf.join('');\n\t}\n};\n\nfunction LiveNodeList(node,refresh){\n\tthis._node = node;\n\tthis._refresh = refresh\n\t_updateLiveList(this);\n}\nfunction _updateLiveList(list){\n\tvar inc = list._node._inc || list._node.ownerDocument._inc;\n\tif(list._inc != inc){\n\t\tvar ls = list._refresh(list._node);\n\t\t//console.log(ls.length)\n\t\t__set__(list,'length',ls.length);\n\t\tcopy(ls,list);\n\t\tlist._inc = inc;\n\t}\n}\nLiveNodeList.prototype.item = function(i){\n\t_updateLiveList(this);\n\treturn this[i];\n}\n\n_extends(LiveNodeList,NodeList);\n\n/**\n * Objects implementing the NamedNodeMap interface are used\n * to represent collections of nodes that can be accessed by name.\n * Note that NamedNodeMap does not inherit from NodeList;\n * NamedNodeMaps are not maintained in any particular order.\n * Objects contained in an object implementing NamedNodeMap may also be accessed by an ordinal index,\n * but this is simply to allow convenient enumeration of the contents of a NamedNodeMap,\n * and does not imply that the DOM specifies an order to these Nodes.\n * NamedNodeMap objects in the DOM are live.\n * used for attributes or DocumentType entities \n */\nfunction NamedNodeMap() {\n};\n\nfunction _findNodeIndex(list,node){\n\tvar i = list.length;\n\twhile(i--){\n\t\tif(list[i] === node){return i}\n\t}\n}\n\nfunction _addNamedNode(el,list,newAttr,oldAttr){\n\tif(oldAttr){\n\t\tlist[_findNodeIndex(list,oldAttr)] = newAttr;\n\t}else{\n\t\tlist[list.length++] = newAttr;\n\t}\n\tif(el){\n\t\tnewAttr.ownerElement = el;\n\t\tvar doc = el.ownerDocument;\n\t\tif(doc){\n\t\t\toldAttr && _onRemoveAttribute(doc,el,oldAttr);\n\t\t\t_onAddAttribute(doc,el,newAttr);\n\t\t}\n\t}\n}\nfunction _removeNamedNode(el,list,attr){\n\t//console.log('remove attr:'+attr)\n\tvar i = _findNodeIndex(list,attr);\n\tif(i>=0){\n\t\tvar lastIndex = list.length-1\n\t\twhile(i<lastIndex){\n\t\t\tlist[i] = list[++i]\n\t\t}\n\t\tlist.length = lastIndex;\n\t\tif(el){\n\t\t\tvar doc = el.ownerDocument;\n\t\t\tif(doc){\n\t\t\t\t_onRemoveAttribute(doc,el,attr);\n\t\t\t\tattr.ownerElement = null;\n\t\t\t}\n\t\t}\n\t}else{\n\t\tthrow DOMException(NOT_FOUND_ERR,new Error(el.tagName+'@'+attr))\n\t}\n}\nNamedNodeMap.prototype = {\n\tlength:0,\n\titem:NodeList.prototype.item,\n\tgetNamedItem: function(key) {\n//\t\tif(key.indexOf(':')>0 || key == 'xmlns'){\n//\t\t\treturn null;\n//\t\t}\n\t\t//console.log()\n\t\tvar i = this.length;\n\t\twhile(i--){\n\t\t\tvar attr = this[i];\n\t\t\t//console.log(attr.nodeName,key)\n\t\t\tif(attr.nodeName == key){\n\t\t\t\treturn attr;\n\t\t\t}\n\t\t}\n\t},\n\tsetNamedItem: function(attr) {\n\t\tvar el = attr.ownerElement;\n\t\tif(el && el!=this._ownerElement){\n\t\t\tthrow new DOMException(INUSE_ATTRIBUTE_ERR);\n\t\t}\n\t\tvar oldAttr = this.getNamedItem(attr.nodeName);\n\t\t_addNamedNode(this._ownerElement,this,attr,oldAttr);\n\t\treturn oldAttr;\n\t},\n\t/* returns Node */\n\tsetNamedItemNS: function(attr) {// raises: WRONG_DOCUMENT_ERR,NO_MODIFICATION_ALLOWED_ERR,INUSE_ATTRIBUTE_ERR\n\t\tvar el = attr.ownerElement, oldAttr;\n\t\tif(el && el!=this._ownerElement){\n\t\t\tthrow new DOMException(INUSE_ATTRIBUTE_ERR);\n\t\t}\n\t\toldAttr = this.getNamedItemNS(attr.namespaceURI,attr.localName);\n\t\t_addNamedNode(this._ownerElement,this,attr,oldAttr);\n\t\treturn oldAttr;\n\t},\n\n\t/* returns Node */\n\tremoveNamedItem: function(key) {\n\t\tvar attr = this.getNamedItem(key);\n\t\t_removeNamedNode(this._ownerElement,this,attr);\n\t\treturn attr;\n\t\t\n\t\t\n\t},// raises: NOT_FOUND_ERR,NO_MODIFICATION_ALLOWED_ERR\n\t\n\t//for level2\n\tremoveNamedItemNS:function(namespaceURI,localName){\n\t\tvar attr = this.getNamedItemNS(namespaceURI,localName);\n\t\t_removeNamedNode(this._ownerElement,this,attr);\n\t\treturn attr;\n\t},\n\tgetNamedItemNS: function(namespaceURI, localName) {\n\t\tvar i = this.length;\n\t\twhile(i--){\n\t\t\tvar node = this[i];\n\t\t\tif(node.localName == localName && node.namespaceURI == namespaceURI){\n\t\t\t\treturn node;\n\t\t\t}\n\t\t}\n\t\treturn null;\n\t}\n};\n\n/**\n * The DOMImplementation interface represents an object providing methods\n * which are not dependent on any particular document.\n * Such an object is returned by the `Document.implementation` property.\n *\n * __The individual methods describe the differences compared to the specs.__\n *\n * @constructor\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMImplementation MDN\n * @see https://www.w3.org/TR/REC-DOM-Level-1/level-one-core.html#ID-102161490 DOM Level 1 Core (Initial)\n * @see https://www.w3.org/TR/DOM-Level-2-Core/core.html#ID-102161490 DOM Level 2 Core\n * @see https://www.w3.org/TR/DOM-Level-3-Core/core.html#ID-102161490 DOM Level 3 Core\n * @see https://dom.spec.whatwg.org/#domimplementation DOM Living Standard\n */\nfunction DOMImplementation() {\n}\n\nDOMImplementation.prototype = {\n\t/**\n\t * The DOMImplementation.hasFeature() method returns a Boolean flag indicating if a given feature is supported.\n\t * The different implementations fairly diverged in what kind of features were reported.\n\t * The latest version of the spec settled to force this method to always return true, where the functionality was accurate and in use.\n\t *\n\t * @deprecated It is deprecated and modern browsers return true in all cases.\n\t *\n\t * @param {string} feature\n\t * @param {string} [version]\n\t * @returns {boolean} always true\n\t *\n\t * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMImplementation/hasFeature MDN\n\t * @see https://www.w3.org/TR/REC-DOM-Level-1/level-one-core.html#ID-5CED94D7 DOM Level 1 Core\n\t * @see https://dom.spec.whatwg.org/#dom-domimplementation-hasfeature DOM Living Standard\n\t */\n\thasFeature: function(feature, version) {\n\t\t\treturn true;\n\t},\n\t/**\n\t * Creates an XML Document object of the specified type with its document element.\n\t *\n\t * __It behaves slightly different from the description in the living standard__:\n\t * - There is no interface/class `XMLDocument`, it returns a `Document` instance.\n\t * - `contentType`, `encoding`, `mode`, `origin`, `url` fields are currently not declared.\n\t * - this implementation is not validating names or qualified names\n\t *   (when parsing XML strings, the SAX parser takes care of that)\n\t *\n\t * @param {string|null} namespaceURI\n\t * @param {string} qualifiedName\n\t * @param {DocumentType=null} doctype\n\t * @returns {Document}\n\t *\n\t * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMImplementation/createDocument MDN\n\t * @see https://www.w3.org/TR/DOM-Level-2-Core/core.html#Level-2-Core-DOM-createDocument DOM Level 2 Core (initial)\n\t * @see https://dom.spec.whatwg.org/#dom-domimplementation-createdocument  DOM Level 2 Core\n\t *\n\t * @see https://dom.spec.whatwg.org/#validate-and-extract DOM: Validate and extract\n\t * @see https://www.w3.org/TR/xml/#NT-NameStartChar XML Spec: Names\n\t * @see https://www.w3.org/TR/xml-names/#ns-qualnames XML Namespaces: Qualified names\n\t */\n\tcreateDocument: function(namespaceURI,  qualifiedName, doctype){\n\t\tvar doc = new Document();\n\t\tdoc.implementation = this;\n\t\tdoc.childNodes = new NodeList();\n\t\tdoc.doctype = doctype || null;\n\t\tif (doctype){\n\t\t\tdoc.appendChild(doctype);\n\t\t}\n\t\tif (qualifiedName){\n\t\t\tvar root = doc.createElementNS(namespaceURI, qualifiedName);\n\t\t\tdoc.appendChild(root);\n\t\t}\n\t\treturn doc;\n\t},\n\t/**\n\t * Returns a doctype, with the given `qualifiedName`, `publicId`, and `systemId`.\n\t *\n\t * __This behavior is slightly different from the in the specs__:\n\t * - this implementation is not validating names or qualified names\n\t *   (when parsing XML strings, the SAX parser takes care of that)\n\t *\n\t * @param {string} qualifiedName\n\t * @param {string} [publicId]\n\t * @param {string} [systemId]\n\t * @returns {DocumentType} which can either be used with `DOMImplementation.createDocument` upon document creation\n\t * \t\t\t\t  or can be put into the document via methods like `Node.insertBefore()` or `Node.replaceChild()`\n\t *\n\t * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMImplementation/createDocumentType MDN\n\t * @see https://www.w3.org/TR/DOM-Level-2-Core/core.html#Level-2-Core-DOM-createDocType DOM Level 2 Core\n\t * @see https://dom.spec.whatwg.org/#dom-domimplementation-createdocumenttype DOM Living Standard\n\t *\n\t * @see https://dom.spec.whatwg.org/#validate-and-extract DOM: Validate and extract\n\t * @see https://www.w3.org/TR/xml/#NT-NameStartChar XML Spec: Names\n\t * @see https://www.w3.org/TR/xml-names/#ns-qualnames XML Namespaces: Qualified names\n\t */\n\tcreateDocumentType: function(qualifiedName, publicId, systemId){\n\t\tvar node = new DocumentType();\n\t\tnode.name = qualifiedName;\n\t\tnode.nodeName = qualifiedName;\n\t\tnode.publicId = publicId || '';\n\t\tnode.systemId = systemId || '';\n\n\t\treturn node;\n\t}\n};\n\n\n/**\n * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/core.html#ID-1950641247\n */\n\nfunction Node() {\n};\n\nNode.prototype = {\n\tfirstChild : null,\n\tlastChild : null,\n\tpreviousSibling : null,\n\tnextSibling : null,\n\tattributes : null,\n\tparentNode : null,\n\tchildNodes : null,\n\townerDocument : null,\n\tnodeValue : null,\n\tnamespaceURI : null,\n\tprefix : null,\n\tlocalName : null,\n\t// Modified in DOM Level 2:\n\tinsertBefore:function(newChild, refChild){//raises \n\t\treturn _insertBefore(this,newChild,refChild);\n\t},\n\treplaceChild:function(newChild, oldChild){//raises \n\t\tthis.insertBefore(newChild,oldChild);\n\t\tif(oldChild){\n\t\t\tthis.removeChild(oldChild);\n\t\t}\n\t},\n\tremoveChild:function(oldChild){\n\t\treturn _removeChild(this,oldChild);\n\t},\n\tappendChild:function(newChild){\n\t\treturn this.insertBefore(newChild,null);\n\t},\n\thasChildNodes:function(){\n\t\treturn this.firstChild != null;\n\t},\n\tcloneNode:function(deep){\n\t\treturn cloneNode(this.ownerDocument||this,this,deep);\n\t},\n\t// Modified in DOM Level 2:\n\tnormalize:function(){\n\t\tvar child = this.firstChild;\n\t\twhile(child){\n\t\t\tvar next = child.nextSibling;\n\t\t\tif(next && next.nodeType == TEXT_NODE && child.nodeType == TEXT_NODE){\n\t\t\t\tthis.removeChild(next);\n\t\t\t\tchild.appendData(next.data);\n\t\t\t}else{\n\t\t\t\tchild.normalize();\n\t\t\t\tchild = next;\n\t\t\t}\n\t\t}\n\t},\n  \t// Introduced in DOM Level 2:\n\tisSupported:function(feature, version){\n\t\treturn this.ownerDocument.implementation.hasFeature(feature,version);\n\t},\n    // Introduced in DOM Level 2:\n    hasAttributes:function(){\n    \treturn this.attributes.length>0;\n    },\n\t/**\n\t * Look up the prefix associated to the given namespace URI, starting from this node.\n\t * **The default namespace declarations are ignored by this method.**\n\t * See Namespace Prefix Lookup for details on the algorithm used by this method.\n\t *\n\t * _Note: The implementation seems to be incomplete when compared to the algorithm described in the specs._\n\t *\n\t * @param {string | null} namespaceURI\n\t * @returns {string | null}\n\t * @see https://www.w3.org/TR/DOM-Level-3-Core/core.html#Node3-lookupNamespacePrefix\n\t * @see https://www.w3.org/TR/DOM-Level-3-Core/namespaces-algorithms.html#lookupNamespacePrefixAlgo\n\t * @see https://dom.spec.whatwg.org/#dom-node-lookupprefix\n\t * @see https://github.com/xmldom/xmldom/issues/322\n\t */\n    lookupPrefix:function(namespaceURI){\n    \tvar el = this;\n    \twhile(el){\n    \t\tvar map = el._nsMap;\n    \t\t//console.dir(map)\n    \t\tif(map){\n    \t\t\tfor(var n in map){\n    \t\t\t\tif(map[n] == namespaceURI){\n    \t\t\t\t\treturn n;\n    \t\t\t\t}\n    \t\t\t}\n    \t\t}\n    \t\tel = el.nodeType == ATTRIBUTE_NODE?el.ownerDocument : el.parentNode;\n    \t}\n    \treturn null;\n    },\n    // Introduced in DOM Level 3:\n    lookupNamespaceURI:function(prefix){\n    \tvar el = this;\n    \twhile(el){\n    \t\tvar map = el._nsMap;\n    \t\t//console.dir(map)\n    \t\tif(map){\n    \t\t\tif(prefix in map){\n    \t\t\t\treturn map[prefix] ;\n    \t\t\t}\n    \t\t}\n    \t\tel = el.nodeType == ATTRIBUTE_NODE?el.ownerDocument : el.parentNode;\n    \t}\n    \treturn null;\n    },\n    // Introduced in DOM Level 3:\n    isDefaultNamespace:function(namespaceURI){\n    \tvar prefix = this.lookupPrefix(namespaceURI);\n    \treturn prefix == null;\n    }\n};\n\n\nfunction _xmlEncoder(c){\n\treturn c == '<' && '&lt;' ||\n         c == '>' && '&gt;' ||\n         c == '&' && '&amp;' ||\n         c == '\"' && '&quot;' ||\n         '&#'+c.charCodeAt()+';'\n}\n\n\ncopy(NodeType,Node);\ncopy(NodeType,Node.prototype);\n\n/**\n * @param callback return true for continue,false for break\n * @return boolean true: break visit;\n */\nfunction _visitNode(node,callback){\n\tif(callback(node)){\n\t\treturn true;\n\t}\n\tif(node = node.firstChild){\n\t\tdo{\n\t\t\tif(_visitNode(node,callback)){return true}\n        }while(node=node.nextSibling)\n    }\n}\n\n\n\nfunction Document(){\n}\n\nfunction _onAddAttribute(doc,el,newAttr){\n\tdoc && doc._inc++;\n\tvar ns = newAttr.namespaceURI ;\n\tif(ns === NAMESPACE.XMLNS){\n\t\t//update namespace\n\t\tel._nsMap[newAttr.prefix?newAttr.localName:''] = newAttr.value\n\t}\n}\n\nfunction _onRemoveAttribute(doc,el,newAttr,remove){\n\tdoc && doc._inc++;\n\tvar ns = newAttr.namespaceURI ;\n\tif(ns === NAMESPACE.XMLNS){\n\t\t//update namespace\n\t\tdelete el._nsMap[newAttr.prefix?newAttr.localName:'']\n\t}\n}\n\nfunction _onUpdateChild(doc,el,newChild){\n\tif(doc && doc._inc){\n\t\tdoc._inc++;\n\t\t//update childNodes\n\t\tvar cs = el.childNodes;\n\t\tif(newChild){\n\t\t\tcs[cs.length++] = newChild;\n\t\t}else{\n\t\t\t//console.log(1)\n\t\t\tvar child = el.firstChild;\n\t\t\tvar i = 0;\n\t\t\twhile(child){\n\t\t\t\tcs[i++] = child;\n\t\t\t\tchild =child.nextSibling;\n\t\t\t}\n\t\t\tcs.length = i;\n\t\t}\n\t}\n}\n\n/**\n * attributes;\n * children;\n * \n * writeable properties:\n * nodeValue,Attr:value,CharacterData:data\n * prefix\n */\nfunction _removeChild(parentNode,child){\n\tvar previous = child.previousSibling;\n\tvar next = child.nextSibling;\n\tif(previous){\n\t\tprevious.nextSibling = next;\n\t}else{\n\t\tparentNode.firstChild = next\n\t}\n\tif(next){\n\t\tnext.previousSibling = previous;\n\t}else{\n\t\tparentNode.lastChild = previous;\n\t}\n\t_onUpdateChild(parentNode.ownerDocument,parentNode);\n\treturn child;\n}\n/**\n * preformance key(refChild == null)\n */\nfunction _insertBefore(parentNode,newChild,nextChild){\n\tvar cp = newChild.parentNode;\n\tif(cp){\n\t\tcp.removeChild(newChild);//remove and update\n\t}\n\tif(newChild.nodeType === DOCUMENT_FRAGMENT_NODE){\n\t\tvar newFirst = newChild.firstChild;\n\t\tif (newFirst == null) {\n\t\t\treturn newChild;\n\t\t}\n\t\tvar newLast = newChild.lastChild;\n\t}else{\n\t\tnewFirst = newLast = newChild;\n\t}\n\tvar pre = nextChild ? nextChild.previousSibling : parentNode.lastChild;\n\n\tnewFirst.previousSibling = pre;\n\tnewLast.nextSibling = nextChild;\n\t\n\t\n\tif(pre){\n\t\tpre.nextSibling = newFirst;\n\t}else{\n\t\tparentNode.firstChild = newFirst;\n\t}\n\tif(nextChild == null){\n\t\tparentNode.lastChild = newLast;\n\t}else{\n\t\tnextChild.previousSibling = newLast;\n\t}\n\tdo{\n\t\tnewFirst.parentNode = parentNode;\n\t}while(newFirst !== newLast && (newFirst= newFirst.nextSibling))\n\t_onUpdateChild(parentNode.ownerDocument||parentNode,parentNode);\n\t//console.log(parentNode.lastChild.nextSibling == null)\n\tif (newChild.nodeType == DOCUMENT_FRAGMENT_NODE) {\n\t\tnewChild.firstChild = newChild.lastChild = null;\n\t}\n\treturn newChild;\n}\nfunction _appendSingleChild(parentNode,newChild){\n\tvar cp = newChild.parentNode;\n\tif(cp){\n\t\tvar pre = parentNode.lastChild;\n\t\tcp.removeChild(newChild);//remove and update\n\t\tvar pre = parentNode.lastChild;\n\t}\n\tvar pre = parentNode.lastChild;\n\tnewChild.parentNode = parentNode;\n\tnewChild.previousSibling = pre;\n\tnewChild.nextSibling = null;\n\tif(pre){\n\t\tpre.nextSibling = newChild;\n\t}else{\n\t\tparentNode.firstChild = newChild;\n\t}\n\tparentNode.lastChild = newChild;\n\t_onUpdateChild(parentNode.ownerDocument,parentNode,newChild);\n\treturn newChild;\n\t//console.log(\"__aa\",parentNode.lastChild.nextSibling == null)\n}\nDocument.prototype = {\n\t//implementation : null,\n\tnodeName :  '#document',\n\tnodeType :  DOCUMENT_NODE,\n\t/**\n\t * The DocumentType node of the document.\n\t *\n\t * @readonly\n\t * @type DocumentType\n\t */\n\tdoctype :  null,\n\tdocumentElement :  null,\n\t_inc : 1,\n\n\tinsertBefore :  function(newChild, refChild){//raises\n\t\tif(newChild.nodeType == DOCUMENT_FRAGMENT_NODE){\n\t\t\tvar child = newChild.firstChild;\n\t\t\twhile(child){\n\t\t\t\tvar next = child.nextSibling;\n\t\t\t\tthis.insertBefore(child,refChild);\n\t\t\t\tchild = next;\n\t\t\t}\n\t\t\treturn newChild;\n\t\t}\n\t\tif(this.documentElement == null && newChild.nodeType == ELEMENT_NODE){\n\t\t\tthis.documentElement = newChild;\n\t\t}\n\n\t\treturn _insertBefore(this,newChild,refChild),(newChild.ownerDocument = this),newChild;\n\t},\n\tremoveChild :  function(oldChild){\n\t\tif(this.documentElement == oldChild){\n\t\t\tthis.documentElement = null;\n\t\t}\n\t\treturn _removeChild(this,oldChild);\n\t},\n\t// Introduced in DOM Level 2:\n\timportNode : function(importedNode,deep){\n\t\treturn importNode(this,importedNode,deep);\n\t},\n\t// Introduced in DOM Level 2:\n\tgetElementById :\tfunction(id){\n\t\tvar rtv = null;\n\t\t_visitNode(this.documentElement,function(node){\n\t\t\tif(node.nodeType == ELEMENT_NODE){\n\t\t\t\tif(node.getAttribute('id') == id){\n\t\t\t\t\trtv = node;\n\t\t\t\t\treturn true;\n\t\t\t\t}\n\t\t\t}\n\t\t})\n\t\treturn rtv;\n\t},\n\n\t/**\n\t * The `getElementsByClassName` method of `Document` interface returns an array-like object\n\t * of all child elements which have **all** of the given class name(s).\n\t *\n\t * Returns an empty list if `classeNames` is an empty string or only contains HTML white space characters.\n\t *\n\t *\n\t * Warning: This is a live LiveNodeList.\n\t * Changes in the DOM will reflect in the array as the changes occur.\n\t * If an element selected by this array no longer qualifies for the selector,\n\t * it will automatically be removed. Be aware of this for iteration purposes.\n\t *\n\t * @param {string} classNames is a string representing the class name(s) to match; multiple class names are separated by (ASCII-)whitespace\n\t *\n\t * @see https://developer.mozilla.org/en-US/docs/Web/API/Document/getElementsByClassName\n\t * @see https://dom.spec.whatwg.org/#concept-getelementsbyclassname\n\t */\n\tgetElementsByClassName: function(classNames) {\n\t\tvar classNamesSet = toOrderedSet(classNames)\n\t\treturn new LiveNodeList(this, function(base) {\n\t\t\tvar ls = [];\n\t\t\tif (classNamesSet.length > 0) {\n\t\t\t\t_visitNode(base.documentElement, function(node) {\n\t\t\t\t\tif(node !== base && node.nodeType === ELEMENT_NODE) {\n\t\t\t\t\t\tvar nodeClassNames = node.getAttribute('class')\n\t\t\t\t\t\t// can be null if the attribute does not exist\n\t\t\t\t\t\tif (nodeClassNames) {\n\t\t\t\t\t\t\t// before splitting and iterating just compare them for the most common case\n\t\t\t\t\t\t\tvar matches = classNames === nodeClassNames;\n\t\t\t\t\t\t\tif (!matches) {\n\t\t\t\t\t\t\t\tvar nodeClassNamesSet = toOrderedSet(nodeClassNames)\n\t\t\t\t\t\t\t\tmatches = classNamesSet.every(arrayIncludes(nodeClassNamesSet))\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\tif(matches) {\n\t\t\t\t\t\t\t\tls.push(node);\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t});\n\t\t\t}\n\t\t\treturn ls;\n\t\t});\n\t},\n\n\t//document factory method:\n\tcreateElement :\tfunction(tagName){\n\t\tvar node = new Element();\n\t\tnode.ownerDocument = this;\n\t\tnode.nodeName = tagName;\n\t\tnode.tagName = tagName;\n\t\tnode.localName = tagName;\n\t\tnode.childNodes = new NodeList();\n\t\tvar attrs\t= node.attributes = new NamedNodeMap();\n\t\tattrs._ownerElement = node;\n\t\treturn node;\n\t},\n\tcreateDocumentFragment :\tfunction(){\n\t\tvar node = new DocumentFragment();\n\t\tnode.ownerDocument = this;\n\t\tnode.childNodes = new NodeList();\n\t\treturn node;\n\t},\n\tcreateTextNode :\tfunction(data){\n\t\tvar node = new Text();\n\t\tnode.ownerDocument = this;\n\t\tnode.appendData(data)\n\t\treturn node;\n\t},\n\tcreateComment :\tfunction(data){\n\t\tvar node = new Comment();\n\t\tnode.ownerDocument = this;\n\t\tnode.appendData(data)\n\t\treturn node;\n\t},\n\tcreateCDATASection :\tfunction(data){\n\t\tvar node = new CDATASection();\n\t\tnode.ownerDocument = this;\n\t\tnode.appendData(data)\n\t\treturn node;\n\t},\n\tcreateProcessingInstruction :\tfunction(target,data){\n\t\tvar node = new ProcessingInstruction();\n\t\tnode.ownerDocument = this;\n\t\tnode.tagName = node.target = target;\n\t\tnode.nodeValue= node.data = data;\n\t\treturn node;\n\t},\n\tcreateAttribute :\tfunction(name){\n\t\tvar node = new Attr();\n\t\tnode.ownerDocument\t= this;\n\t\tnode.name = name;\n\t\tnode.nodeName\t= name;\n\t\tnode.localName = name;\n\t\tnode.specified = true;\n\t\treturn node;\n\t},\n\tcreateEntityReference :\tfunction(name){\n\t\tvar node = new EntityReference();\n\t\tnode.ownerDocument\t= this;\n\t\tnode.nodeName\t= name;\n\t\treturn node;\n\t},\n\t// Introduced in DOM Level 2:\n\tcreateElementNS :\tfunction(namespaceURI,qualifiedName){\n\t\tvar node = new Element();\n\t\tvar pl = qualifiedName.split(':');\n\t\tvar attrs\t= node.attributes = new NamedNodeMap();\n\t\tnode.childNodes = new NodeList();\n\t\tnode.ownerDocument = this;\n\t\tnode.nodeName = qualifiedName;\n\t\tnode.tagName = qualifiedName;\n\t\tnode.namespaceURI = namespaceURI;\n\t\tif(pl.length == 2){\n\t\t\tnode.prefix = pl[0];\n\t\t\tnode.localName = pl[1];\n\t\t}else{\n\t\t\t//el.prefix = null;\n\t\t\tnode.localName = qualifiedName;\n\t\t}\n\t\tattrs._ownerElement = node;\n\t\treturn node;\n\t},\n\t// Introduced in DOM Level 2:\n\tcreateAttributeNS :\tfunction(namespaceURI,qualifiedName){\n\t\tvar node = new Attr();\n\t\tvar pl = qualifiedName.split(':');\n\t\tnode.ownerDocument = this;\n\t\tnode.nodeName = qualifiedName;\n\t\tnode.name = qualifiedName;\n\t\tnode.namespaceURI = namespaceURI;\n\t\tnode.specified = true;\n\t\tif(pl.length == 2){\n\t\t\tnode.prefix = pl[0];\n\t\t\tnode.localName = pl[1];\n\t\t}else{\n\t\t\t//el.prefix = null;\n\t\t\tnode.localName = qualifiedName;\n\t\t}\n\t\treturn node;\n\t}\n};\n_extends(Document,Node);\n\n\nfunction Element() {\n\tthis._nsMap = {};\n};\nElement.prototype = {\n\tnodeType : ELEMENT_NODE,\n\thasAttribute : function(name){\n\t\treturn this.getAttributeNode(name)!=null;\n\t},\n\tgetAttribute : function(name){\n\t\tvar attr = this.getAttributeNode(name);\n\t\treturn attr && attr.value || '';\n\t},\n\tgetAttributeNode : function(name){\n\t\treturn this.attributes.getNamedItem(name);\n\t},\n\tsetAttribute : function(name, value){\n\t\tvar attr = this.ownerDocument.createAttribute(name);\n\t\tattr.value = attr.nodeValue = \"\" + value;\n\t\tthis.setAttributeNode(attr)\n\t},\n\tremoveAttribute : function(name){\n\t\tvar attr = this.getAttributeNode(name)\n\t\tattr && this.removeAttributeNode(attr);\n\t},\n\t\n\t//four real opeartion method\n\tappendChild:function(newChild){\n\t\tif(newChild.nodeType === DOCUMENT_FRAGMENT_NODE){\n\t\t\treturn this.insertBefore(newChild,null);\n\t\t}else{\n\t\t\treturn _appendSingleChild(this,newChild);\n\t\t}\n\t},\n\tsetAttributeNode : function(newAttr){\n\t\treturn this.attributes.setNamedItem(newAttr);\n\t},\n\tsetAttributeNodeNS : function(newAttr){\n\t\treturn this.attributes.setNamedItemNS(newAttr);\n\t},\n\tremoveAttributeNode : function(oldAttr){\n\t\t//console.log(this == oldAttr.ownerElement)\n\t\treturn this.attributes.removeNamedItem(oldAttr.nodeName);\n\t},\n\t//get real attribute name,and remove it by removeAttributeNode\n\tremoveAttributeNS : function(namespaceURI, localName){\n\t\tvar old = this.getAttributeNodeNS(namespaceURI, localName);\n\t\told && this.removeAttributeNode(old);\n\t},\n\t\n\thasAttributeNS : function(namespaceURI, localName){\n\t\treturn this.getAttributeNodeNS(namespaceURI, localName)!=null;\n\t},\n\tgetAttributeNS : function(namespaceURI, localName){\n\t\tvar attr = this.getAttributeNodeNS(namespaceURI, localName);\n\t\treturn attr && attr.value || '';\n\t},\n\tsetAttributeNS : function(namespaceURI, qualifiedName, value){\n\t\tvar attr = this.ownerDocument.createAttributeNS(namespaceURI, qualifiedName);\n\t\tattr.value = attr.nodeValue = \"\" + value;\n\t\tthis.setAttributeNode(attr)\n\t},\n\tgetAttributeNodeNS : function(namespaceURI, localName){\n\t\treturn this.attributes.getNamedItemNS(namespaceURI, localName);\n\t},\n\t\n\tgetElementsByTagName : function(tagName){\n\t\treturn new LiveNodeList(this,function(base){\n\t\t\tvar ls = [];\n\t\t\t_visitNode(base,function(node){\n\t\t\t\tif(node !== base && node.nodeType == ELEMENT_NODE && (tagName === '*' || node.tagName == tagName)){\n\t\t\t\t\tls.push(node);\n\t\t\t\t}\n\t\t\t});\n\t\t\treturn ls;\n\t\t});\n\t},\n\tgetElementsByTagNameNS : function(namespaceURI, localName){\n\t\treturn new LiveNodeList(this,function(base){\n\t\t\tvar ls = [];\n\t\t\t_visitNode(base,function(node){\n\t\t\t\tif(node !== base && node.nodeType === ELEMENT_NODE && (namespaceURI === '*' || node.namespaceURI === namespaceURI) && (localName === '*' || node.localName == localName)){\n\t\t\t\t\tls.push(node);\n\t\t\t\t}\n\t\t\t});\n\t\t\treturn ls;\n\t\t\t\n\t\t});\n\t}\n};\nDocument.prototype.getElementsByTagName = Element.prototype.getElementsByTagName;\nDocument.prototype.getElementsByTagNameNS = Element.prototype.getElementsByTagNameNS;\n\n\n_extends(Element,Node);\nfunction Attr() {\n};\nAttr.prototype.nodeType = ATTRIBUTE_NODE;\n_extends(Attr,Node);\n\n\nfunction CharacterData() {\n};\nCharacterData.prototype = {\n\tdata : '',\n\tsubstringData : function(offset, count) {\n\t\treturn this.data.substring(offset, offset+count);\n\t},\n\tappendData: function(text) {\n\t\ttext = this.data+text;\n\t\tthis.nodeValue = this.data = text;\n\t\tthis.length = text.length;\n\t},\n\tinsertData: function(offset,text) {\n\t\tthis.replaceData(offset,0,text);\n\t\n\t},\n\tappendChild:function(newChild){\n\t\tthrow new Error(ExceptionMessage[HIERARCHY_REQUEST_ERR])\n\t},\n\tdeleteData: function(offset, count) {\n\t\tthis.replaceData(offset,count,\"\");\n\t},\n\treplaceData: function(offset, count, text) {\n\t\tvar start = this.data.substring(0,offset);\n\t\tvar end = this.data.substring(offset+count);\n\t\ttext = start + text + end;\n\t\tthis.nodeValue = this.data = text;\n\t\tthis.length = text.length;\n\t}\n}\n_extends(CharacterData,Node);\nfunction Text() {\n};\nText.prototype = {\n\tnodeName : \"#text\",\n\tnodeType : TEXT_NODE,\n\tsplitText : function(offset) {\n\t\tvar text = this.data;\n\t\tvar newText = text.substring(offset);\n\t\ttext = text.substring(0, offset);\n\t\tthis.data = this.nodeValue = text;\n\t\tthis.length = text.length;\n\t\tvar newNode = this.ownerDocument.createTextNode(newText);\n\t\tif(this.parentNode){\n\t\t\tthis.parentNode.insertBefore(newNode, this.nextSibling);\n\t\t}\n\t\treturn newNode;\n\t}\n}\n_extends(Text,CharacterData);\nfunction Comment() {\n};\nComment.prototype = {\n\tnodeName : \"#comment\",\n\tnodeType : COMMENT_NODE\n}\n_extends(Comment,CharacterData);\n\nfunction CDATASection() {\n};\nCDATASection.prototype = {\n\tnodeName : \"#cdata-section\",\n\tnodeType : CDATA_SECTION_NODE\n}\n_extends(CDATASection,CharacterData);\n\n\nfunction DocumentType() {\n};\nDocumentType.prototype.nodeType = DOCUMENT_TYPE_NODE;\n_extends(DocumentType,Node);\n\nfunction Notation() {\n};\nNotation.prototype.nodeType = NOTATION_NODE;\n_extends(Notation,Node);\n\nfunction Entity() {\n};\nEntity.prototype.nodeType = ENTITY_NODE;\n_extends(Entity,Node);\n\nfunction EntityReference() {\n};\nEntityReference.prototype.nodeType = ENTITY_REFERENCE_NODE;\n_extends(EntityReference,Node);\n\nfunction DocumentFragment() {\n};\nDocumentFragment.prototype.nodeName =\t\"#document-fragment\";\nDocumentFragment.prototype.nodeType =\tDOCUMENT_FRAGMENT_NODE;\n_extends(DocumentFragment,Node);\n\n\nfunction ProcessingInstruction() {\n}\nProcessingInstruction.prototype.nodeType = PROCESSING_INSTRUCTION_NODE;\n_extends(ProcessingInstruction,Node);\nfunction XMLSerializer(){}\nXMLSerializer.prototype.serializeToString = function(node,isHtml,nodeFilter){\n\treturn nodeSerializeToString.call(node,isHtml,nodeFilter);\n}\nNode.prototype.toString = nodeSerializeToString;\nfunction nodeSerializeToString(isHtml,nodeFilter){\n\tvar buf = [];\n\tvar refNode = this.nodeType == 9 && this.documentElement || this;\n\tvar prefix = refNode.prefix;\n\tvar uri = refNode.namespaceURI;\n\t\n\tif(uri && prefix == null){\n\t\t//console.log(prefix)\n\t\tvar prefix = refNode.lookupPrefix(uri);\n\t\tif(prefix == null){\n\t\t\t//isHTML = true;\n\t\t\tvar visibleNamespaces=[\n\t\t\t{namespace:uri,prefix:null}\n\t\t\t//{namespace:uri,prefix:''}\n\t\t\t]\n\t\t}\n\t}\n\tserializeToString(this,buf,isHtml,nodeFilter,visibleNamespaces);\n\t//console.log('###',this.nodeType,uri,prefix,buf.join(''))\n\treturn buf.join('');\n}\n\nfunction needNamespaceDefine(node, isHTML, visibleNamespaces) {\n\tvar prefix = node.prefix || '';\n\tvar uri = node.namespaceURI;\n\t// According to [Namespaces in XML 1.0](https://www.w3.org/TR/REC-xml-names/#ns-using) ,\n\t// and more specifically https://www.w3.org/TR/REC-xml-names/#nsc-NoPrefixUndecl :\n\t// > In a namespace declaration for a prefix [...], the attribute value MUST NOT be empty.\n\t// in a similar manner [Namespaces in XML 1.1](https://www.w3.org/TR/xml-names11/#ns-using)\n\t// and more specifically https://www.w3.org/TR/xml-names11/#nsc-NSDeclared :\n\t// > [...] Furthermore, the attribute value [...] must not be an empty string.\n\t// so serializing empty namespace value like xmlns:ds=\"\" would produce an invalid XML document.\n\tif (!uri) {\n\t\treturn false;\n\t}\n\tif (prefix === \"xml\" && uri === NAMESPACE.XML || uri === NAMESPACE.XMLNS) {\n\t\treturn false;\n\t}\n\t\n\tvar i = visibleNamespaces.length \n\twhile (i--) {\n\t\tvar ns = visibleNamespaces[i];\n\t\t// get namespace prefix\n\t\tif (ns.prefix === prefix) {\n\t\t\treturn ns.namespace !== uri;\n\t\t}\n\t}\n\treturn true;\n}\n/**\n * Well-formed constraint: No < in Attribute Values\n * The replacement text of any entity referred to directly or indirectly in an attribute value must not contain a <.\n * @see https://www.w3.org/TR/xml/#CleanAttrVals\n * @see https://www.w3.org/TR/xml/#NT-AttValue\n */\nfunction addSerializedAttribute(buf, qualifiedName, value) {\n\tbuf.push(' ', qualifiedName, '=\"', value.replace(/[<&\"]/g,_xmlEncoder), '\"')\n}\n\nfunction serializeToString(node,buf,isHTML,nodeFilter,visibleNamespaces){\n\tif (!visibleNamespaces) {\n\t\tvisibleNamespaces = [];\n\t}\n\n\tif(nodeFilter){\n\t\tnode = nodeFilter(node);\n\t\tif(node){\n\t\t\tif(typeof node == 'string'){\n\t\t\t\tbuf.push(node);\n\t\t\t\treturn;\n\t\t\t}\n\t\t}else{\n\t\t\treturn;\n\t\t}\n\t\t//buf.sort.apply(attrs, attributeSorter);\n\t}\n\n\tswitch(node.nodeType){\n\tcase ELEMENT_NODE:\n\t\tvar attrs = node.attributes;\n\t\tvar len = attrs.length;\n\t\tvar child = node.firstChild;\n\t\tvar nodeName = node.tagName;\n\t\t\n\t\tisHTML = NAMESPACE.isHTML(node.namespaceURI) || isHTML\n\n\t\tvar prefixedNodeName = nodeName\n\t\tif (!isHTML && !node.prefix && node.namespaceURI) {\n\t\t\tvar defaultNS\n\t\t\t// lookup current default ns from `xmlns` attribute\n\t\t\tfor (var ai = 0; ai < attrs.length; ai++) {\n\t\t\t\tif (attrs.item(ai).name === 'xmlns') {\n\t\t\t\t\tdefaultNS = attrs.item(ai).value\n\t\t\t\t\tbreak\n\t\t\t\t}\n\t\t\t}\n\t\t\tif (!defaultNS) {\n\t\t\t\t// lookup current default ns in visibleNamespaces\n\t\t\t\tfor (var nsi = visibleNamespaces.length - 1; nsi >= 0; nsi--) {\n\t\t\t\t\tvar namespace = visibleNamespaces[nsi]\n\t\t\t\t\tif (namespace.prefix === '' && namespace.namespace === node.namespaceURI) {\n\t\t\t\t\t\tdefaultNS = namespace.namespace\n\t\t\t\t\t\tbreak\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t\tif (defaultNS !== node.namespaceURI) {\n\t\t\t\tfor (var nsi = visibleNamespaces.length - 1; nsi >= 0; nsi--) {\n\t\t\t\t\tvar namespace = visibleNamespaces[nsi]\n\t\t\t\t\tif (namespace.namespace === node.namespaceURI) {\n\t\t\t\t\t\tif (namespace.prefix) {\n\t\t\t\t\t\t\tprefixedNodeName = namespace.prefix + ':' + nodeName\n\t\t\t\t\t\t}\n\t\t\t\t\t\tbreak\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tbuf.push('<', prefixedNodeName);\n\n\t\tfor(var i=0;i<len;i++){\n\t\t\t// add namespaces for attributes\n\t\t\tvar attr = attrs.item(i);\n\t\t\tif (attr.prefix == 'xmlns') {\n\t\t\t\tvisibleNamespaces.push({ prefix: attr.localName, namespace: attr.value });\n\t\t\t}else if(attr.nodeName == 'xmlns'){\n\t\t\t\tvisibleNamespaces.push({ prefix: '', namespace: attr.value });\n\t\t\t}\n\t\t}\n\n\t\tfor(var i=0;i<len;i++){\n\t\t\tvar attr = attrs.item(i);\n\t\t\tif (needNamespaceDefine(attr,isHTML, visibleNamespaces)) {\n\t\t\t\tvar prefix = attr.prefix||'';\n\t\t\t\tvar uri = attr.namespaceURI;\n\t\t\t\taddSerializedAttribute(buf, prefix ? 'xmlns:' + prefix : \"xmlns\", uri);\n\t\t\t\tvisibleNamespaces.push({ prefix: prefix, namespace:uri });\n\t\t\t}\n\t\t\tserializeToString(attr,buf,isHTML,nodeFilter,visibleNamespaces);\n\t\t}\n\n\t\t// add namespace for current node\t\t\n\t\tif (nodeName === prefixedNodeName && needNamespaceDefine(node, isHTML, visibleNamespaces)) {\n\t\t\tvar prefix = node.prefix||'';\n\t\t\tvar uri = node.namespaceURI;\n\t\t\taddSerializedAttribute(buf, prefix ? 'xmlns:' + prefix : \"xmlns\", uri);\n\t\t\tvisibleNamespaces.push({ prefix: prefix, namespace:uri });\n\t\t}\n\t\t\n\t\tif(child || isHTML && !/^(?:meta|link|img|br|hr|input)$/i.test(nodeName)){\n\t\t\tbuf.push('>');\n\t\t\t//if is cdata child node\n\t\t\tif(isHTML && /^script$/i.test(nodeName)){\n\t\t\t\twhile(child){\n\t\t\t\t\tif(child.data){\n\t\t\t\t\t\tbuf.push(child.data);\n\t\t\t\t\t}else{\n\t\t\t\t\t\tserializeToString(child, buf, isHTML, nodeFilter, visibleNamespaces.slice());\n\t\t\t\t\t}\n\t\t\t\t\tchild = child.nextSibling;\n\t\t\t\t}\n\t\t\t}else\n\t\t\t{\n\t\t\t\twhile(child){\n\t\t\t\t\tserializeToString(child, buf, isHTML, nodeFilter, visibleNamespaces.slice());\n\t\t\t\t\tchild = child.nextSibling;\n\t\t\t\t}\n\t\t\t}\n\t\t\tbuf.push('</',prefixedNodeName,'>');\n\t\t}else{\n\t\t\tbuf.push('/>');\n\t\t}\n\t\t// remove added visible namespaces\n\t\t//visibleNamespaces.length = startVisibleNamespaces;\n\t\treturn;\n\tcase DOCUMENT_NODE:\n\tcase DOCUMENT_FRAGMENT_NODE:\n\t\tvar child = node.firstChild;\n\t\twhile(child){\n\t\t\tserializeToString(child, buf, isHTML, nodeFilter, visibleNamespaces.slice());\n\t\t\tchild = child.nextSibling;\n\t\t}\n\t\treturn;\n\tcase ATTRIBUTE_NODE:\n\t\treturn addSerializedAttribute(buf, node.name, node.value);\n\tcase TEXT_NODE:\n\t\t/**\n\t\t * The ampersand character (&) and the left angle bracket (<) must not appear in their literal form,\n\t\t * except when used as markup delimiters, or within a comment, a processing instruction, or a CDATA section.\n\t\t * If they are needed elsewhere, they must be escaped using either numeric character references or the strings\n\t\t * `&amp;` and `&lt;` respectively.\n\t\t * The right angle bracket (>) may be represented using the string \" &gt; \", and must, for compatibility,\n\t\t * be escaped using either `&gt;` or a character reference when it appears in the string `]]>` in content,\n\t\t * when that string is not marking the end of a CDATA section.\n\t\t *\n\t\t * In the content of elements, character data is any string of characters\n\t\t * which does not contain the start-delimiter of any markup\n\t\t * and does not include the CDATA-section-close delimiter, `]]>`.\n\t\t *\n\t\t * @see https://www.w3.org/TR/xml/#NT-CharData\n\t\t */\n\t\treturn buf.push(node.data\n\t\t\t.replace(/[<&]/g,_xmlEncoder)\n\t\t\t.replace(/]]>/g, ']]&gt;')\n\t\t);\n\tcase CDATA_SECTION_NODE:\n\t\treturn buf.push( '<![CDATA[',node.data,']]>');\n\tcase COMMENT_NODE:\n\t\treturn buf.push( \"<!--\",node.data,\"-->\");\n\tcase DOCUMENT_TYPE_NODE:\n\t\tvar pubid = node.publicId;\n\t\tvar sysid = node.systemId;\n\t\tbuf.push('<!DOCTYPE ',node.name);\n\t\tif(pubid){\n\t\t\tbuf.push(' PUBLIC ', pubid);\n\t\t\tif (sysid && sysid!='.') {\n\t\t\t\tbuf.push(' ', sysid);\n\t\t\t}\n\t\t\tbuf.push('>');\n\t\t}else if(sysid && sysid!='.'){\n\t\t\tbuf.push(' SYSTEM ', sysid, '>');\n\t\t}else{\n\t\t\tvar sub = node.internalSubset;\n\t\t\tif(sub){\n\t\t\t\tbuf.push(\" [\",sub,\"]\");\n\t\t\t}\n\t\t\tbuf.push(\">\");\n\t\t}\n\t\treturn;\n\tcase PROCESSING_INSTRUCTION_NODE:\n\t\treturn buf.push( \"<?\",node.target,\" \",node.data,\"?>\");\n\tcase ENTITY_REFERENCE_NODE:\n\t\treturn buf.push( '&',node.nodeName,';');\n\t//case ENTITY_NODE:\n\t//case NOTATION_NODE:\n\tdefault:\n\t\tbuf.push('??',node.nodeName);\n\t}\n}\nfunction importNode(doc,node,deep){\n\tvar node2;\n\tswitch (node.nodeType) {\n\tcase ELEMENT_NODE:\n\t\tnode2 = node.cloneNode(false);\n\t\tnode2.ownerDocument = doc;\n\t\t//var attrs = node2.attributes;\n\t\t//var len = attrs.length;\n\t\t//for(var i=0;i<len;i++){\n\t\t\t//node2.setAttributeNodeNS(importNode(doc,attrs.item(i),deep));\n\t\t//}\n\tcase DOCUMENT_FRAGMENT_NODE:\n\t\tbreak;\n\tcase ATTRIBUTE_NODE:\n\t\tdeep = true;\n\t\tbreak;\n\t//case ENTITY_REFERENCE_NODE:\n\t//case PROCESSING_INSTRUCTION_NODE:\n\t////case TEXT_NODE:\n\t//case CDATA_SECTION_NODE:\n\t//case COMMENT_NODE:\n\t//\tdeep = false;\n\t//\tbreak;\n\t//case DOCUMENT_NODE:\n\t//case DOCUMENT_TYPE_NODE:\n\t//cannot be imported.\n\t//case ENTITY_NODE:\n\t//case NOTATION_NODE：\n\t//can not hit in level3\n\t//default:throw e;\n\t}\n\tif(!node2){\n\t\tnode2 = node.cloneNode(false);//false\n\t}\n\tnode2.ownerDocument = doc;\n\tnode2.parentNode = null;\n\tif(deep){\n\t\tvar child = node.firstChild;\n\t\twhile(child){\n\t\t\tnode2.appendChild(importNode(doc,child,deep));\n\t\t\tchild = child.nextSibling;\n\t\t}\n\t}\n\treturn node2;\n}\n//\n//var _relationMap = {firstChild:1,lastChild:1,previousSibling:1,nextSibling:1,\n//\t\t\t\t\tattributes:1,childNodes:1,parentNode:1,documentElement:1,doctype,};\nfunction cloneNode(doc,node,deep){\n\tvar node2 = new node.constructor();\n\tfor(var n in node){\n\t\tvar v = node[n];\n\t\tif(typeof v != 'object' ){\n\t\t\tif(v != node2[n]){\n\t\t\t\tnode2[n] = v;\n\t\t\t}\n\t\t}\n\t}\n\tif(node.childNodes){\n\t\tnode2.childNodes = new NodeList();\n\t}\n\tnode2.ownerDocument = doc;\n\tswitch (node2.nodeType) {\n\tcase ELEMENT_NODE:\n\t\tvar attrs\t= node.attributes;\n\t\tvar attrs2\t= node2.attributes = new NamedNodeMap();\n\t\tvar len = attrs.length\n\t\tattrs2._ownerElement = node2;\n\t\tfor(var i=0;i<len;i++){\n\t\t\tnode2.setAttributeNode(cloneNode(doc,attrs.item(i),true));\n\t\t}\n\t\tbreak;;\n\tcase ATTRIBUTE_NODE:\n\t\tdeep = true;\n\t}\n\tif(deep){\n\t\tvar child = node.firstChild;\n\t\twhile(child){\n\t\t\tnode2.appendChild(cloneNode(doc,child,deep));\n\t\t\tchild = child.nextSibling;\n\t\t}\n\t}\n\treturn node2;\n}\n\nfunction __set__(object,key,value){\n\tobject[key] = value\n}\n//do dynamic\ntry{\n\tif(Object.defineProperty){\n\t\tObject.defineProperty(LiveNodeList.prototype,'length',{\n\t\t\tget:function(){\n\t\t\t\t_updateLiveList(this);\n\t\t\t\treturn this.$$length;\n\t\t\t}\n\t\t});\n\n\t\tObject.defineProperty(Node.prototype,'textContent',{\n\t\t\tget:function(){\n\t\t\t\treturn getTextContent(this);\n\t\t\t},\n\n\t\t\tset:function(data){\n\t\t\t\tswitch(this.nodeType){\n\t\t\t\tcase ELEMENT_NODE:\n\t\t\t\tcase DOCUMENT_FRAGMENT_NODE:\n\t\t\t\t\twhile(this.firstChild){\n\t\t\t\t\t\tthis.removeChild(this.firstChild);\n\t\t\t\t\t}\n\t\t\t\t\tif(data || String(data)){\n\t\t\t\t\t\tthis.appendChild(this.ownerDocument.createTextNode(data));\n\t\t\t\t\t}\n\t\t\t\t\tbreak;\n\n\t\t\t\tdefault:\n\t\t\t\t\tthis.data = data;\n\t\t\t\t\tthis.value = data;\n\t\t\t\t\tthis.nodeValue = data;\n\t\t\t\t}\n\t\t\t}\n\t\t})\n\t\t\n\t\tfunction getTextContent(node){\n\t\t\tswitch(node.nodeType){\n\t\t\tcase ELEMENT_NODE:\n\t\t\tcase DOCUMENT_FRAGMENT_NODE:\n\t\t\t\tvar buf = [];\n\t\t\t\tnode = node.firstChild;\n\t\t\t\twhile(node){\n\t\t\t\t\tif(node.nodeType!==7 && node.nodeType !==8){\n\t\t\t\t\t\tbuf.push(getTextContent(node));\n\t\t\t\t\t}\n\t\t\t\t\tnode = node.nextSibling;\n\t\t\t\t}\n\t\t\t\treturn buf.join('');\n\t\t\tdefault:\n\t\t\t\treturn node.nodeValue;\n\t\t\t}\n\t\t}\n\n\t\t__set__ = function(object,key,value){\n\t\t\t//console.log(value)\n\t\t\tobject['$$'+key] = value\n\t\t}\n\t}\n}catch(e){//ie8\n}\n\n//if(typeof require == 'function'){\n\texports.DocumentType = DocumentType;\n\texports.DOMException = DOMException;\n\texports.DOMImplementation = DOMImplementation;\n\texports.Element = Element;\n\texports.Node = Node;\n\texports.NodeList = NodeList;\n\texports.XMLSerializer = XMLSerializer;\n//}\n","var freeze = require('./conventions').freeze;\n\n/**\n * The entities that are predefined in every XML document.\n *\n * @see https://www.w3.org/TR/2006/REC-xml11-20060816/#sec-predefined-ent W3C XML 1.1\n * @see https://www.w3.org/TR/2008/REC-xml-20081126/#sec-predefined-ent W3C XML 1.0\n * @see https://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references#Predefined_entities_in_XML Wikipedia\n */\nexports.XML_ENTITIES = freeze({amp:'&', apos:\"'\", gt:'>', lt:'<', quot:'\"'})\n\n/**\n * A map of currently 241 entities that are detected in an HTML document.\n * They contain all entries from `XML_ENTITIES`.\n *\n * @see XML_ENTITIES\n * @see DOMParser.parseFromString\n * @see DOMImplementation.prototype.createHTMLDocument\n * @see https://html.spec.whatwg.org/#named-character-references WHATWG HTML(5) Spec\n * @see https://www.w3.org/TR/xml-entity-names/ W3C XML Entity Names\n * @see https://www.w3.org/TR/html4/sgml/entities.html W3C HTML4/SGML\n * @see https://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references#Character_entity_references_in_HTML Wikipedia (HTML)\n * @see https://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references#Entities_representing_special_characters_in_XHTML Wikpedia (XHTML)\n */\nexports.HTML_ENTITIES = freeze({\n       lt: '<',\n       gt: '>',\n       amp: '&',\n       quot: '\"',\n       apos: \"'\",\n       Agrave: \"À\",\n       Aacute: \"Á\",\n       Acirc: \"Â\",\n       Atilde: \"Ã\",\n       Auml: \"Ä\",\n       Aring: \"Å\",\n       AElig: \"Æ\",\n       Ccedil: \"Ç\",\n       Egrave: \"È\",\n       Eacute: \"É\",\n       Ecirc: \"Ê\",\n       Euml: \"Ë\",\n       Igrave: \"Ì\",\n       Iacute: \"Í\",\n       Icirc: \"Î\",\n       Iuml: \"Ï\",\n       ETH: \"Ð\",\n       Ntilde: \"Ñ\",\n       Ograve: \"Ò\",\n       Oacute: \"Ó\",\n       Ocirc: \"Ô\",\n       Otilde: \"Õ\",\n       Ouml: \"Ö\",\n       Oslash: \"Ø\",\n       Ugrave: \"Ù\",\n       Uacute: \"Ú\",\n       Ucirc: \"Û\",\n       Uuml: \"Ü\",\n       Yacute: \"Ý\",\n       THORN: \"Þ\",\n       szlig: \"ß\",\n       agrave: \"à\",\n       aacute: \"á\",\n       acirc: \"â\",\n       atilde: \"ã\",\n       auml: \"ä\",\n       aring: \"å\",\n       aelig: \"æ\",\n       ccedil: \"ç\",\n       egrave: \"è\",\n       eacute: \"é\",\n       ecirc: \"ê\",\n       euml: \"ë\",\n       igrave: \"ì\",\n       iacute: \"í\",\n       icirc: \"î\",\n       iuml: \"ï\",\n       eth: \"ð\",\n       ntilde: \"ñ\",\n       ograve: \"ò\",\n       oacute: \"ó\",\n       ocirc: \"ô\",\n       otilde: \"õ\",\n       ouml: \"ö\",\n       oslash: \"ø\",\n       ugrave: \"ù\",\n       uacute: \"ú\",\n       ucirc: \"û\",\n       uuml: \"ü\",\n       yacute: \"ý\",\n       thorn: \"þ\",\n       yuml: \"ÿ\",\n       nbsp: \"\\u00a0\",\n       iexcl: \"¡\",\n       cent: \"¢\",\n       pound: \"£\",\n       curren: \"¤\",\n       yen: \"¥\",\n       brvbar: \"¦\",\n       sect: \"§\",\n       uml: \"¨\",\n       copy: \"©\",\n       ordf: \"ª\",\n       laquo: \"«\",\n       not: \"¬\",\n       shy: \"­­\",\n       reg: \"®\",\n       macr: \"¯\",\n       deg: \"°\",\n       plusmn: \"±\",\n       sup2: \"²\",\n       sup3: \"³\",\n       acute: \"´\",\n       micro: \"µ\",\n       para: \"¶\",\n       middot: \"·\",\n       cedil: \"¸\",\n       sup1: \"¹\",\n       ordm: \"º\",\n       raquo: \"»\",\n       frac14: \"¼\",\n       frac12: \"½\",\n       frac34: \"¾\",\n       iquest: \"¿\",\n       times: \"×\",\n       divide: \"÷\",\n       forall: \"∀\",\n       part: \"∂\",\n       exist: \"∃\",\n       empty: \"∅\",\n       nabla: \"∇\",\n       isin: \"∈\",\n       notin: \"∉\",\n       ni: \"∋\",\n       prod: \"∏\",\n       sum: \"∑\",\n       minus: \"−\",\n       lowast: \"∗\",\n       radic: \"√\",\n       prop: \"∝\",\n       infin: \"∞\",\n       ang: \"∠\",\n       and: \"∧\",\n       or: \"∨\",\n       cap: \"∩\",\n       cup: \"∪\",\n       'int': \"∫\",\n       there4: \"∴\",\n       sim: \"∼\",\n       cong: \"≅\",\n       asymp: \"≈\",\n       ne: \"≠\",\n       equiv: \"≡\",\n       le: \"≤\",\n       ge: \"≥\",\n       sub: \"⊂\",\n       sup: \"⊃\",\n       nsub: \"⊄\",\n       sube: \"⊆\",\n       supe: \"⊇\",\n       oplus: \"⊕\",\n       otimes: \"⊗\",\n       perp: \"⊥\",\n       sdot: \"⋅\",\n       Alpha: \"Α\",\n       Beta: \"Β\",\n       Gamma: \"Γ\",\n       Delta: \"Δ\",\n       Epsilon: \"Ε\",\n       Zeta: \"Ζ\",\n       Eta: \"Η\",\n       Theta: \"Θ\",\n       Iota: \"Ι\",\n       Kappa: \"Κ\",\n       Lambda: \"Λ\",\n       Mu: \"Μ\",\n       Nu: \"Ν\",\n       Xi: \"Ξ\",\n       Omicron: \"Ο\",\n       Pi: \"Π\",\n       Rho: \"Ρ\",\n       Sigma: \"Σ\",\n       Tau: \"Τ\",\n       Upsilon: \"Υ\",\n       Phi: \"Φ\",\n       Chi: \"Χ\",\n       Psi: \"Ψ\",\n       Omega: \"Ω\",\n       alpha: \"α\",\n       beta: \"β\",\n       gamma: \"γ\",\n       delta: \"δ\",\n       epsilon: \"ε\",\n       zeta: \"ζ\",\n       eta: \"η\",\n       theta: \"θ\",\n       iota: \"ι\",\n       kappa: \"κ\",\n       lambda: \"λ\",\n       mu: \"μ\",\n       nu: \"ν\",\n       xi: \"ξ\",\n       omicron: \"ο\",\n       pi: \"π\",\n       rho: \"ρ\",\n       sigmaf: \"ς\",\n       sigma: \"σ\",\n       tau: \"τ\",\n       upsilon: \"υ\",\n       phi: \"φ\",\n       chi: \"χ\",\n       psi: \"ψ\",\n       omega: \"ω\",\n       thetasym: \"ϑ\",\n       upsih: \"ϒ\",\n       piv: \"ϖ\",\n       OElig: \"Œ\",\n       oelig: \"œ\",\n       Scaron: \"Š\",\n       scaron: \"š\",\n       Yuml: \"Ÿ\",\n       fnof: \"ƒ\",\n       circ: \"ˆ\",\n       tilde: \"˜\",\n       ensp: \" \",\n       emsp: \" \",\n       thinsp: \" \",\n       zwnj: \"‌\",\n       zwj: \"‍\",\n       lrm: \"‎\",\n       rlm: \"‏\",\n       ndash: \"–\",\n       mdash: \"—\",\n       lsquo: \"‘\",\n       rsquo: \"’\",\n       sbquo: \"‚\",\n       ldquo: \"“\",\n       rdquo: \"”\",\n       bdquo: \"„\",\n       dagger: \"†\",\n       Dagger: \"‡\",\n       bull: \"•\",\n       hellip: \"…\",\n       permil: \"‰\",\n       prime: \"′\",\n       Prime: \"″\",\n       lsaquo: \"‹\",\n       rsaquo: \"›\",\n       oline: \"‾\",\n       euro: \"€\",\n       trade: \"™\",\n       larr: \"←\",\n       uarr: \"↑\",\n       rarr: \"→\",\n       darr: \"↓\",\n       harr: \"↔\",\n       crarr: \"↵\",\n       lceil: \"⌈\",\n       rceil: \"⌉\",\n       lfloor: \"⌊\",\n       rfloor: \"⌋\",\n       loz: \"◊\",\n       spades: \"♠\",\n       clubs: \"♣\",\n       hearts: \"♥\",\n       diams: \"♦\"\n});\n\n/**\n * @deprecated use `HTML_ENTITIES` instead\n * @see HTML_ENTITIES\n */\nexports.entityMap = exports.HTML_ENTITIES\n","var dom = require('./dom')\nexports.DOMImplementation = dom.DOMImplementation\nexports.XMLSerializer = dom.XMLSerializer\nexports.DOMParser = require('./dom-parser').DOMParser\n","var NAMESPACE = require(\"./conventions\").NAMESPACE;\n\n//[4]   \tNameStartChar\t   ::=   \t\":\" | [A-Z] | \"_\" | [a-z] | [#xC0-#xD6] | [#xD8-#xF6] | [#xF8-#x2FF] | [#x370-#x37D] | [#x37F-#x1FFF] | [#x200C-#x200D] | [#x2070-#x218F] | [#x2C00-#x2FEF] | [#x3001-#xD7FF] | [#xF900-#xFDCF] | [#xFDF0-#xFFFD] | [#x10000-#xEFFFF]\n//[4a]   \tNameChar\t   ::=   \tNameStartChar | \"-\" | \".\" | [0-9] | #xB7 | [#x0300-#x036F] | [#x203F-#x2040]\n//[5]   \tName\t   ::=   \tNameStartChar (NameChar)*\nvar nameStartChar = /[A-Z_a-z\\xC0-\\xD6\\xD8-\\xF6\\u00F8-\\u02FF\\u0370-\\u037D\\u037F-\\u1FFF\\u200C-\\u200D\\u2070-\\u218F\\u2C00-\\u2FEF\\u3001-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFFD]///\\u10000-\\uEFFFF\nvar nameChar = new RegExp(\"[\\\\-\\\\.0-9\"+nameStartChar.source.slice(1,-1)+\"\\\\u00B7\\\\u0300-\\\\u036F\\\\u203F-\\\\u2040]\");\nvar tagNamePattern = new RegExp('^'+nameStartChar.source+nameChar.source+'*(?:\\:'+nameStartChar.source+nameChar.source+'*)?$');\n//var tagNamePattern = /^[a-zA-Z_][\\w\\-\\.]*(?:\\:[a-zA-Z_][\\w\\-\\.]*)?$/\n//var handlers = 'resolveEntity,getExternalSubset,characters,endDocument,endElement,endPrefixMapping,ignorableWhitespace,processingInstruction,setDocumentLocator,skippedEntity,startDocument,startElement,startPrefixMapping,notationDecl,unparsedEntityDecl,error,fatalError,warning,attributeDecl,elementDecl,externalEntityDecl,internalEntityDecl,comment,endCDATA,endDTD,endEntity,startCDATA,startDTD,startEntity'.split(',')\n\n//S_TAG,\tS_ATTR,\tS_EQ,\tS_ATTR_NOQUOT_VALUE\n//S_ATTR_SPACE,\tS_ATTR_END,\tS_TAG_SPACE, S_TAG_CLOSE\nvar S_TAG = 0;//tag name offerring\nvar S_ATTR = 1;//attr name offerring \nvar S_ATTR_SPACE=2;//attr name end and space offer\nvar S_EQ = 3;//=space?\nvar S_ATTR_NOQUOT_VALUE = 4;//attr value(no quot value only)\nvar S_ATTR_END = 5;//attr value end and no space(quot end)\nvar S_TAG_SPACE = 6;//(attr value end || tag end ) && (space offer)\nvar S_TAG_CLOSE = 7;//closed el<el />\n\n/**\n * Creates an error that will not be caught by XMLReader aka the SAX parser.\n *\n * @param {string} message\n * @param {any?} locator Optional, can provide details about the location in the source\n * @constructor\n */\nfunction ParseError(message, locator) {\n\tthis.message = message\n\tthis.locator = locator\n\tif(Error.captureStackTrace) Error.captureStackTrace(this, ParseError);\n}\nParseError.prototype = new Error();\nParseError.prototype.name = ParseError.name\n\nfunction XMLReader(){\n\t\n}\n\nXMLReader.prototype = {\n\tparse:function(source,defaultNSMap,entityMap){\n\t\tvar domBuilder = this.domBuilder;\n\t\tdomBuilder.startDocument();\n\t\t_copy(defaultNSMap ,defaultNSMap = {})\n\t\tparse(source,defaultNSMap,entityMap,\n\t\t\t\tdomBuilder,this.errorHandler);\n\t\tdomBuilder.endDocument();\n\t}\n}\nfunction parse(source,defaultNSMapCopy,entityMap,domBuilder,errorHandler){\n\tfunction fixedFromCharCode(code) {\n\t\t// String.prototype.fromCharCode does not supports\n\t\t// > 2 bytes unicode chars directly\n\t\tif (code > 0xffff) {\n\t\t\tcode -= 0x10000;\n\t\t\tvar surrogate1 = 0xd800 + (code >> 10)\n\t\t\t\t, surrogate2 = 0xdc00 + (code & 0x3ff);\n\n\t\t\treturn String.fromCharCode(surrogate1, surrogate2);\n\t\t} else {\n\t\t\treturn String.fromCharCode(code);\n\t\t}\n\t}\n\tfunction entityReplacer(a){\n\t\tvar k = a.slice(1,-1);\n\t\tif(k in entityMap){\n\t\t\treturn entityMap[k]; \n\t\t}else if(k.charAt(0) === '#'){\n\t\t\treturn fixedFromCharCode(parseInt(k.substr(1).replace('x','0x')))\n\t\t}else{\n\t\t\terrorHandler.error('entity not found:'+a);\n\t\t\treturn a;\n\t\t}\n\t}\n\tfunction appendText(end){//has some bugs\n\t\tif(end>start){\n\t\t\tvar xt = source.substring(start,end).replace(/&#?\\w+;/g,entityReplacer);\n\t\t\tlocator&&position(start);\n\t\t\tdomBuilder.characters(xt,0,end-start);\n\t\t\tstart = end\n\t\t}\n\t}\n\tfunction position(p,m){\n\t\twhile(p>=lineEnd && (m = linePattern.exec(source))){\n\t\t\tlineStart = m.index;\n\t\t\tlineEnd = lineStart + m[0].length;\n\t\t\tlocator.lineNumber++;\n\t\t\t//console.log('line++:',locator,startPos,endPos)\n\t\t}\n\t\tlocator.columnNumber = p-lineStart+1;\n\t}\n\tvar lineStart = 0;\n\tvar lineEnd = 0;\n\tvar linePattern = /.*(?:\\r\\n?|\\n)|.*$/g\n\tvar locator = domBuilder.locator;\n\t\n\tvar parseStack = [{currentNSMap:defaultNSMapCopy}]\n\tvar closeMap = {};\n\tvar start = 0;\n\twhile(true){\n\t\ttry{\n\t\t\tvar tagStart = source.indexOf('<',start);\n\t\t\tif(tagStart<0){\n\t\t\t\tif(!source.substr(start).match(/^\\s*$/)){\n\t\t\t\t\tvar doc = domBuilder.doc;\n\t    \t\t\tvar text = doc.createTextNode(source.substr(start));\n\t    \t\t\tdoc.appendChild(text);\n\t    \t\t\tdomBuilder.currentElement = text;\n\t\t\t\t}\n\t\t\t\treturn;\n\t\t\t}\n\t\t\tif(tagStart>start){\n\t\t\t\tappendText(tagStart);\n\t\t\t}\n\t\t\tswitch(source.charAt(tagStart+1)){\n\t\t\tcase '/':\n\t\t\t\tvar end = source.indexOf('>',tagStart+3);\n\t\t\t\tvar tagName = source.substring(tagStart + 2, end).replace(/[ \\t\\n\\r]+$/g, '');\n\t\t\t\tvar config = parseStack.pop();\n\t\t\t\tif(end<0){\n\t\t\t\t\t\n\t        \t\ttagName = source.substring(tagStart+2).replace(/[\\s<].*/,'');\n\t        \t\terrorHandler.error(\"end tag name: \"+tagName+' is not complete:'+config.tagName);\n\t        \t\tend = tagStart+1+tagName.length;\n\t        \t}else if(tagName.match(/\\s</)){\n\t        \t\ttagName = tagName.replace(/[\\s<].*/,'');\n\t        \t\terrorHandler.error(\"end tag name: \"+tagName+' maybe not complete');\n\t        \t\tend = tagStart+1+tagName.length;\n\t\t\t\t}\n\t\t\t\tvar localNSMap = config.localNSMap;\n\t\t\t\tvar endMatch = config.tagName == tagName;\n\t\t\t\tvar endIgnoreCaseMach = endMatch || config.tagName&&config.tagName.toLowerCase() == tagName.toLowerCase()\n\t\t        if(endIgnoreCaseMach){\n\t\t        \tdomBuilder.endElement(config.uri,config.localName,tagName);\n\t\t\t\t\tif(localNSMap){\n\t\t\t\t\t\tfor(var prefix in localNSMap){\n\t\t\t\t\t\t\tdomBuilder.endPrefixMapping(prefix) ;\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\tif(!endMatch){\n\t\t            \terrorHandler.fatalError(\"end tag name: \"+tagName+' is not match the current start tagName:'+config.tagName ); // No known test case\n\t\t\t\t\t}\n\t\t        }else{\n\t\t        \tparseStack.push(config)\n\t\t        }\n\t\t\t\t\n\t\t\t\tend++;\n\t\t\t\tbreak;\n\t\t\t\t// end elment\n\t\t\tcase '?':// <?...?>\n\t\t\t\tlocator&&position(tagStart);\n\t\t\t\tend = parseInstruction(source,tagStart,domBuilder);\n\t\t\t\tbreak;\n\t\t\tcase '!':// <!doctype,<![CDATA,<!--\n\t\t\t\tlocator&&position(tagStart);\n\t\t\t\tend = parseDCC(source,tagStart,domBuilder,errorHandler);\n\t\t\t\tbreak;\n\t\t\tdefault:\n\t\t\t\tlocator&&position(tagStart);\n\t\t\t\tvar el = new ElementAttributes();\n\t\t\t\tvar currentNSMap = parseStack[parseStack.length-1].currentNSMap;\n\t\t\t\t//elStartEnd\n\t\t\t\tvar end = parseElementStartPart(source,tagStart,el,currentNSMap,entityReplacer,errorHandler);\n\t\t\t\tvar len = el.length;\n\t\t\t\t\n\t\t\t\t\n\t\t\t\tif(!el.closed && fixSelfClosed(source,end,el.tagName,closeMap)){\n\t\t\t\t\tel.closed = true;\n\t\t\t\t\tif(!entityMap.nbsp){\n\t\t\t\t\t\terrorHandler.warning('unclosed xml attribute');\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\tif(locator && len){\n\t\t\t\t\tvar locator2 = copyLocator(locator,{});\n\t\t\t\t\t//try{//attribute position fixed\n\t\t\t\t\tfor(var i = 0;i<len;i++){\n\t\t\t\t\t\tvar a = el[i];\n\t\t\t\t\t\tposition(a.offset);\n\t\t\t\t\t\ta.locator = copyLocator(locator,{});\n\t\t\t\t\t}\n\t\t\t\t\tdomBuilder.locator = locator2\n\t\t\t\t\tif(appendElement(el,domBuilder,currentNSMap)){\n\t\t\t\t\t\tparseStack.push(el)\n\t\t\t\t\t}\n\t\t\t\t\tdomBuilder.locator = locator;\n\t\t\t\t}else{\n\t\t\t\t\tif(appendElement(el,domBuilder,currentNSMap)){\n\t\t\t\t\t\tparseStack.push(el)\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\tif (NAMESPACE.isHTML(el.uri) && !el.closed) {\n\t\t\t\t\tend = parseHtmlSpecialContent(source,end,el.tagName,entityReplacer,domBuilder)\n\t\t\t\t} else {\n\t\t\t\t\tend++;\n\t\t\t\t}\n\t\t\t}\n\t\t}catch(e){\n\t\t\tif (e instanceof ParseError) {\n\t\t\t\tthrow e;\n\t\t\t}\n\t\t\terrorHandler.error('element parse error: '+e)\n\t\t\tend = -1;\n\t\t}\n\t\tif(end>start){\n\t\t\tstart = end;\n\t\t}else{\n\t\t\t//TODO: 这里有可能sax回退，有位置错误风险\n\t\t\tappendText(Math.max(tagStart,start)+1);\n\t\t}\n\t}\n}\nfunction copyLocator(f,t){\n\tt.lineNumber = f.lineNumber;\n\tt.columnNumber = f.columnNumber;\n\treturn t;\n}\n\n/**\n * @see #appendElement(source,elStartEnd,el,selfClosed,entityReplacer,domBuilder,parseStack);\n * @return end of the elementStartPart(end of elementEndPart for selfClosed el)\n */\nfunction parseElementStartPart(source,start,el,currentNSMap,entityReplacer,errorHandler){\n\n\t/**\n\t * @param {string} qname\n\t * @param {string} value\n\t * @param {number} startIndex\n\t */\n\tfunction addAttribute(qname, value, startIndex) {\n\t\tif (el.attributeNames.hasOwnProperty(qname)) {\n\t\t\terrorHandler.fatalError('Attribute ' + qname + ' redefined')\n\t\t}\n\t\tel.addValue(qname, value, startIndex)\n\t}\n\tvar attrName;\n\tvar value;\n\tvar p = ++start;\n\tvar s = S_TAG;//status\n\twhile(true){\n\t\tvar c = source.charAt(p);\n\t\tswitch(c){\n\t\tcase '=':\n\t\t\tif(s === S_ATTR){//attrName\n\t\t\t\tattrName = source.slice(start,p);\n\t\t\t\ts = S_EQ;\n\t\t\t}else if(s === S_ATTR_SPACE){\n\t\t\t\ts = S_EQ;\n\t\t\t}else{\n\t\t\t\t//fatalError: equal must after attrName or space after attrName\n\t\t\t\tthrow new Error('attribute equal must after attrName'); // No known test case\n\t\t\t}\n\t\t\tbreak;\n\t\tcase '\\'':\n\t\tcase '\"':\n\t\t\tif(s === S_EQ || s === S_ATTR //|| s == S_ATTR_SPACE\n\t\t\t\t){//equal\n\t\t\t\tif(s === S_ATTR){\n\t\t\t\t\terrorHandler.warning('attribute value must after \"=\"')\n\t\t\t\t\tattrName = source.slice(start,p)\n\t\t\t\t}\n\t\t\t\tstart = p+1;\n\t\t\t\tp = source.indexOf(c,start)\n\t\t\t\tif(p>0){\n\t\t\t\t\tvalue = source.slice(start,p).replace(/&#?\\w+;/g,entityReplacer);\n\t\t\t\t\taddAttribute(attrName, value, start-1);\n\t\t\t\t\ts = S_ATTR_END;\n\t\t\t\t}else{\n\t\t\t\t\t//fatalError: no end quot match\n\t\t\t\t\tthrow new Error('attribute value no end \\''+c+'\\' match');\n\t\t\t\t}\n\t\t\t}else if(s == S_ATTR_NOQUOT_VALUE){\n\t\t\t\tvalue = source.slice(start,p).replace(/&#?\\w+;/g,entityReplacer);\n\t\t\t\t//console.log(attrName,value,start,p)\n\t\t\t\taddAttribute(attrName, value, start);\n\t\t\t\t//console.dir(el)\n\t\t\t\terrorHandler.warning('attribute \"'+attrName+'\" missed start quot('+c+')!!');\n\t\t\t\tstart = p+1;\n\t\t\t\ts = S_ATTR_END\n\t\t\t}else{\n\t\t\t\t//fatalError: no equal before\n\t\t\t\tthrow new Error('attribute value must after \"=\"'); // No known test case\n\t\t\t}\n\t\t\tbreak;\n\t\tcase '/':\n\t\t\tswitch(s){\n\t\t\tcase S_TAG:\n\t\t\t\tel.setTagName(source.slice(start,p));\n\t\t\tcase S_ATTR_END:\n\t\t\tcase S_TAG_SPACE:\n\t\t\tcase S_TAG_CLOSE:\n\t\t\t\ts =S_TAG_CLOSE;\n\t\t\t\tel.closed = true;\n\t\t\tcase S_ATTR_NOQUOT_VALUE:\n\t\t\tcase S_ATTR:\n\t\t\tcase S_ATTR_SPACE:\n\t\t\t\tbreak;\n\t\t\t//case S_EQ:\n\t\t\tdefault:\n\t\t\t\tthrow new Error(\"attribute invalid close char('/')\") // No known test case\n\t\t\t}\n\t\t\tbreak;\n\t\tcase ''://end document\n\t\t\terrorHandler.error('unexpected end of input');\n\t\t\tif(s == S_TAG){\n\t\t\t\tel.setTagName(source.slice(start,p));\n\t\t\t}\n\t\t\treturn p;\n\t\tcase '>':\n\t\t\tswitch(s){\n\t\t\tcase S_TAG:\n\t\t\t\tel.setTagName(source.slice(start,p));\n\t\t\tcase S_ATTR_END:\n\t\t\tcase S_TAG_SPACE:\n\t\t\tcase S_TAG_CLOSE:\n\t\t\t\tbreak;//normal\n\t\t\tcase S_ATTR_NOQUOT_VALUE://Compatible state\n\t\t\tcase S_ATTR:\n\t\t\t\tvalue = source.slice(start,p);\n\t\t\t\tif(value.slice(-1) === '/'){\n\t\t\t\t\tel.closed  = true;\n\t\t\t\t\tvalue = value.slice(0,-1)\n\t\t\t\t}\n\t\t\tcase S_ATTR_SPACE:\n\t\t\t\tif(s === S_ATTR_SPACE){\n\t\t\t\t\tvalue = attrName;\n\t\t\t\t}\n\t\t\t\tif(s == S_ATTR_NOQUOT_VALUE){\n\t\t\t\t\terrorHandler.warning('attribute \"'+value+'\" missed quot(\")!');\n\t\t\t\t\taddAttribute(attrName, value.replace(/&#?\\w+;/g,entityReplacer), start)\n\t\t\t\t}else{\n\t\t\t\t\tif(!NAMESPACE.isHTML(currentNSMap['']) || !value.match(/^(?:disabled|checked|selected)$/i)){\n\t\t\t\t\t\terrorHandler.warning('attribute \"'+value+'\" missed value!! \"'+value+'\" instead!!')\n\t\t\t\t\t}\n\t\t\t\t\taddAttribute(value, value, start)\n\t\t\t\t}\n\t\t\t\tbreak;\n\t\t\tcase S_EQ:\n\t\t\t\tthrow new Error('attribute value missed!!');\n\t\t\t}\n//\t\t\tconsole.log(tagName,tagNamePattern,tagNamePattern.test(tagName))\n\t\t\treturn p;\n\t\t/*xml space '\\x20' | #x9 | #xD | #xA; */\n\t\tcase '\\u0080':\n\t\t\tc = ' ';\n\t\tdefault:\n\t\t\tif(c<= ' '){//space\n\t\t\t\tswitch(s){\n\t\t\t\tcase S_TAG:\n\t\t\t\t\tel.setTagName(source.slice(start,p));//tagName\n\t\t\t\t\ts = S_TAG_SPACE;\n\t\t\t\t\tbreak;\n\t\t\t\tcase S_ATTR:\n\t\t\t\t\tattrName = source.slice(start,p)\n\t\t\t\t\ts = S_ATTR_SPACE;\n\t\t\t\t\tbreak;\n\t\t\t\tcase S_ATTR_NOQUOT_VALUE:\n\t\t\t\t\tvar value = source.slice(start,p).replace(/&#?\\w+;/g,entityReplacer);\n\t\t\t\t\terrorHandler.warning('attribute \"'+value+'\" missed quot(\")!!');\n\t\t\t\t\taddAttribute(attrName, value, start)\n\t\t\t\tcase S_ATTR_END:\n\t\t\t\t\ts = S_TAG_SPACE;\n\t\t\t\t\tbreak;\n\t\t\t\t//case S_TAG_SPACE:\n\t\t\t\t//case S_EQ:\n\t\t\t\t//case S_ATTR_SPACE:\n\t\t\t\t//\tvoid();break;\n\t\t\t\t//case S_TAG_CLOSE:\n\t\t\t\t\t//ignore warning\n\t\t\t\t}\n\t\t\t}else{//not space\n//S_TAG,\tS_ATTR,\tS_EQ,\tS_ATTR_NOQUOT_VALUE\n//S_ATTR_SPACE,\tS_ATTR_END,\tS_TAG_SPACE, S_TAG_CLOSE\n\t\t\t\tswitch(s){\n\t\t\t\t//case S_TAG:void();break;\n\t\t\t\t//case S_ATTR:void();break;\n\t\t\t\t//case S_ATTR_NOQUOT_VALUE:void();break;\n\t\t\t\tcase S_ATTR_SPACE:\n\t\t\t\t\tvar tagName =  el.tagName;\n\t\t\t\t\tif (!NAMESPACE.isHTML(currentNSMap['']) || !attrName.match(/^(?:disabled|checked|selected)$/i)) {\n\t\t\t\t\t\terrorHandler.warning('attribute \"'+attrName+'\" missed value!! \"'+attrName+'\" instead2!!')\n\t\t\t\t\t}\n\t\t\t\t\taddAttribute(attrName, attrName, start);\n\t\t\t\t\tstart = p;\n\t\t\t\t\ts = S_ATTR;\n\t\t\t\t\tbreak;\n\t\t\t\tcase S_ATTR_END:\n\t\t\t\t\terrorHandler.warning('attribute space is required\"'+attrName+'\"!!')\n\t\t\t\tcase S_TAG_SPACE:\n\t\t\t\t\ts = S_ATTR;\n\t\t\t\t\tstart = p;\n\t\t\t\t\tbreak;\n\t\t\t\tcase S_EQ:\n\t\t\t\t\ts = S_ATTR_NOQUOT_VALUE;\n\t\t\t\t\tstart = p;\n\t\t\t\t\tbreak;\n\t\t\t\tcase S_TAG_CLOSE:\n\t\t\t\t\tthrow new Error(\"elements closed character '/' and '>' must be connected to\");\n\t\t\t\t}\n\t\t\t}\n\t\t}//end outer switch\n\t\t//console.log('p++',p)\n\t\tp++;\n\t}\n}\n/**\n * @return true if has new namespace define\n */\nfunction appendElement(el,domBuilder,currentNSMap){\n\tvar tagName = el.tagName;\n\tvar localNSMap = null;\n\t//var currentNSMap = parseStack[parseStack.length-1].currentNSMap;\n\tvar i = el.length;\n\twhile(i--){\n\t\tvar a = el[i];\n\t\tvar qName = a.qName;\n\t\tvar value = a.value;\n\t\tvar nsp = qName.indexOf(':');\n\t\tif(nsp>0){\n\t\t\tvar prefix = a.prefix = qName.slice(0,nsp);\n\t\t\tvar localName = qName.slice(nsp+1);\n\t\t\tvar nsPrefix = prefix === 'xmlns' && localName\n\t\t}else{\n\t\t\tlocalName = qName;\n\t\t\tprefix = null\n\t\t\tnsPrefix = qName === 'xmlns' && ''\n\t\t}\n\t\t//can not set prefix,because prefix !== ''\n\t\ta.localName = localName ;\n\t\t//prefix == null for no ns prefix attribute \n\t\tif(nsPrefix !== false){//hack!!\n\t\t\tif(localNSMap == null){\n\t\t\t\tlocalNSMap = {}\n\t\t\t\t//console.log(currentNSMap,0)\n\t\t\t\t_copy(currentNSMap,currentNSMap={})\n\t\t\t\t//console.log(currentNSMap,1)\n\t\t\t}\n\t\t\tcurrentNSMap[nsPrefix] = localNSMap[nsPrefix] = value;\n\t\t\ta.uri = NAMESPACE.XMLNS\n\t\t\tdomBuilder.startPrefixMapping(nsPrefix, value) \n\t\t}\n\t}\n\tvar i = el.length;\n\twhile(i--){\n\t\ta = el[i];\n\t\tvar prefix = a.prefix;\n\t\tif(prefix){//no prefix attribute has no namespace\n\t\t\tif(prefix === 'xml'){\n\t\t\t\ta.uri = NAMESPACE.XML;\n\t\t\t}if(prefix !== 'xmlns'){\n\t\t\t\ta.uri = currentNSMap[prefix || '']\n\t\t\t\t\n\t\t\t\t//{console.log('###'+a.qName,domBuilder.locator.systemId+'',currentNSMap,a.uri)}\n\t\t\t}\n\t\t}\n\t}\n\tvar nsp = tagName.indexOf(':');\n\tif(nsp>0){\n\t\tprefix = el.prefix = tagName.slice(0,nsp);\n\t\tlocalName = el.localName = tagName.slice(nsp+1);\n\t}else{\n\t\tprefix = null;//important!!\n\t\tlocalName = el.localName = tagName;\n\t}\n\t//no prefix element has default namespace\n\tvar ns = el.uri = currentNSMap[prefix || ''];\n\tdomBuilder.startElement(ns,localName,tagName,el);\n\t//endPrefixMapping and startPrefixMapping have not any help for dom builder\n\t//localNSMap = null\n\tif(el.closed){\n\t\tdomBuilder.endElement(ns,localName,tagName);\n\t\tif(localNSMap){\n\t\t\tfor(prefix in localNSMap){\n\t\t\t\tdomBuilder.endPrefixMapping(prefix) \n\t\t\t}\n\t\t}\n\t}else{\n\t\tel.currentNSMap = currentNSMap;\n\t\tel.localNSMap = localNSMap;\n\t\t//parseStack.push(el);\n\t\treturn true;\n\t}\n}\nfunction parseHtmlSpecialContent(source,elStartEnd,tagName,entityReplacer,domBuilder){\n\tif(/^(?:script|textarea)$/i.test(tagName)){\n\t\tvar elEndStart =  source.indexOf('</'+tagName+'>',elStartEnd);\n\t\tvar text = source.substring(elStartEnd+1,elEndStart);\n\t\tif(/[&<]/.test(text)){\n\t\t\tif(/^script$/i.test(tagName)){\n\t\t\t\t//if(!/\\]\\]>/.test(text)){\n\t\t\t\t\t//lexHandler.startCDATA();\n\t\t\t\t\tdomBuilder.characters(text,0,text.length);\n\t\t\t\t\t//lexHandler.endCDATA();\n\t\t\t\t\treturn elEndStart;\n\t\t\t\t//}\n\t\t\t}//}else{//text area\n\t\t\t\ttext = text.replace(/&#?\\w+;/g,entityReplacer);\n\t\t\t\tdomBuilder.characters(text,0,text.length);\n\t\t\t\treturn elEndStart;\n\t\t\t//}\n\t\t\t\n\t\t}\n\t}\n\treturn elStartEnd+1;\n}\nfunction fixSelfClosed(source,elStartEnd,tagName,closeMap){\n\t//if(tagName in closeMap){\n\tvar pos = closeMap[tagName];\n\tif(pos == null){\n\t\t//console.log(tagName)\n\t\tpos =  source.lastIndexOf('</'+tagName+'>')\n\t\tif(pos<elStartEnd){//忘记闭合\n\t\t\tpos = source.lastIndexOf('</'+tagName)\n\t\t}\n\t\tcloseMap[tagName] =pos\n\t}\n\treturn pos<elStartEnd;\n\t//} \n}\nfunction _copy(source,target){\n\tfor(var n in source){target[n] = source[n]}\n}\nfunction parseDCC(source,start,domBuilder,errorHandler){//sure start with '<!'\n\tvar next= source.charAt(start+2)\n\tswitch(next){\n\tcase '-':\n\t\tif(source.charAt(start + 3) === '-'){\n\t\t\tvar end = source.indexOf('-->',start+4);\n\t\t\t//append comment source.substring(4,end)//<!--\n\t\t\tif(end>start){\n\t\t\t\tdomBuilder.comment(source,start+4,end-start-4);\n\t\t\t\treturn end+3;\n\t\t\t}else{\n\t\t\t\terrorHandler.error(\"Unclosed comment\");\n\t\t\t\treturn -1;\n\t\t\t}\n\t\t}else{\n\t\t\t//error\n\t\t\treturn -1;\n\t\t}\n\tdefault:\n\t\tif(source.substr(start+3,6) == 'CDATA['){\n\t\t\tvar end = source.indexOf(']]>',start+9);\n\t\t\tdomBuilder.startCDATA();\n\t\t\tdomBuilder.characters(source,start+9,end-start-9);\n\t\t\tdomBuilder.endCDATA() \n\t\t\treturn end+3;\n\t\t}\n\t\t//<!DOCTYPE\n\t\t//startDTD(java.lang.String name, java.lang.String publicId, java.lang.String systemId) \n\t\tvar matchs = split(source,start);\n\t\tvar len = matchs.length;\n\t\tif(len>1 && /!doctype/i.test(matchs[0][0])){\n\t\t\tvar name = matchs[1][0];\n\t\t\tvar pubid = false;\n\t\t\tvar sysid = false;\n\t\t\tif(len>3){\n\t\t\t\tif(/^public$/i.test(matchs[2][0])){\n\t\t\t\t\tpubid = matchs[3][0];\n\t\t\t\t\tsysid = len>4 && matchs[4][0];\n\t\t\t\t}else if(/^system$/i.test(matchs[2][0])){\n\t\t\t\t\tsysid = matchs[3][0];\n\t\t\t\t}\n\t\t\t}\n\t\t\tvar lastMatch = matchs[len-1]\n\t\t\tdomBuilder.startDTD(name, pubid, sysid);\n\t\t\tdomBuilder.endDTD();\n\t\t\t\n\t\t\treturn lastMatch.index+lastMatch[0].length\n\t\t}\n\t}\n\treturn -1;\n}\n\n\n\nfunction parseInstruction(source,start,domBuilder){\n\tvar end = source.indexOf('?>',start);\n\tif(end){\n\t\tvar match = source.substring(start,end).match(/^<\\?(\\S*)\\s*([\\s\\S]*?)\\s*$/);\n\t\tif(match){\n\t\t\tvar len = match[0].length;\n\t\t\tdomBuilder.processingInstruction(match[1], match[2]) ;\n\t\t\treturn end+2;\n\t\t}else{//error\n\t\t\treturn -1;\n\t\t}\n\t}\n\treturn -1;\n}\n\nfunction ElementAttributes(){\n\tthis.attributeNames = {}\n}\nElementAttributes.prototype = {\n\tsetTagName:function(tagName){\n\t\tif(!tagNamePattern.test(tagName)){\n\t\t\tthrow new Error('invalid tagName:'+tagName)\n\t\t}\n\t\tthis.tagName = tagName\n\t},\n\taddValue:function(qName, value, offset) {\n\t\tif(!tagNamePattern.test(qName)){\n\t\t\tthrow new Error('invalid attribute:'+qName)\n\t\t}\n\t\tthis.attributeNames[qName] = this.length;\n\t\tthis[this.length++] = {qName:qName,value:value,offset:offset}\n\t},\n\tlength:0,\n\tgetLocalName:function(i){return this[i].localName},\n\tgetLocator:function(i){return this[i].locator},\n\tgetQName:function(i){return this[i].qName},\n\tgetURI:function(i){return this[i].uri},\n\tgetValue:function(i){return this[i].value}\n//\t,getIndex:function(uri, localName)){\n//\t\tif(localName){\n//\t\t\t\n//\t\t}else{\n//\t\t\tvar qName = uri\n//\t\t}\n//\t},\n//\tgetValue:function(){return this.getValue(this.getIndex.apply(this,arguments))},\n//\tgetType:function(uri,localName){}\n//\tgetType:function(i){},\n}\n\n\n\nfunction split(source,start){\n\tvar match;\n\tvar buf = [];\n\tvar reg = /'[^']+'|\"[^\"]+\"|[^\\s<>\\/=]+=?|(\\/?\\s*>|<)/g;\n\treg.lastIndex = start;\n\treg.exec(source);//skip <\n\twhile(match = reg.exec(source)){\n\t\tbuf.push(match);\n\t\tif(match[1])return buf;\n\t}\n}\n\nexports.XMLReader = XMLReader;\nexports.ParseError = ParseError;\n","// Imports\nimport ___CSS_LOADER_API_SOURCEMAP_IMPORT___ from \"../../css-loader/dist/runtime/cssWithMappingToString.js\";\nimport ___CSS_LOADER_API_IMPORT___ from \"../../css-loader/dist/runtime/api.js\";\nvar ___CSS_LOADER_EXPORT___ = ___CSS_LOADER_API_IMPORT___(___CSS_LOADER_API_SOURCEMAP_IMPORT___);\n// Module\n___CSS_LOADER_EXPORT___.push([module.id, \"@charset \\\"UTF-8\\\";.video-js .vjs-big-play-button .vjs-icon-placeholder:before,.video-js .vjs-modal-dialog,.vjs-button>.vjs-icon-placeholder:before,.vjs-modal-dialog .vjs-modal-dialog-content{position:absolute;top:0;left:0;width:100%;height:100%}.video-js .vjs-big-play-button .vjs-icon-placeholder:before,.vjs-button>.vjs-icon-placeholder:before{text-align:center}@font-face{font-family:VideoJS;src:url(data:application/font-woff;charset=utf-8;base64,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format(\\\"woff\\\");font-weight:400;font-style:normal}.video-js .vjs-big-play-button .vjs-icon-placeholder:before,.video-js .vjs-play-control .vjs-icon-placeholder,.vjs-icon-play{font-family:VideoJS;font-weight:400;font-style:normal}.video-js .vjs-big-play-button .vjs-icon-placeholder:before,.video-js .vjs-play-control .vjs-icon-placeholder:before,.vjs-icon-play:before{content:\\\"\\\\f101\\\"}.vjs-icon-play-circle{font-family:VideoJS;font-weight:400;font-style:normal}.vjs-icon-play-circle:before{content:\\\"\\\\f102\\\"}.video-js .vjs-play-control.vjs-playing .vjs-icon-placeholder,.vjs-icon-pause{font-family:VideoJS;font-weight:400;font-style:normal}.video-js .vjs-play-control.vjs-playing .vjs-icon-placeholder:before,.vjs-icon-pause:before{content:\\\"\\\\f103\\\"}.video-js .vjs-mute-control.vjs-vol-0 .vjs-icon-placeholder,.vjs-icon-volume-mute{font-family:VideoJS;font-weight:400;font-style:normal}.video-js .vjs-mute-control.vjs-vol-0 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187.447c0 13.29-2.486 23.307-7.46 30.057s-12.535 10.125-22.69 10.125c-9.988 0-17.51-3.292-22.566-9.872-5.058-6.58-7.65-16.323-7.776-29.23V172.53c0-13.287 2.485-23.252 7.458-29.896 4.973-6.643 12.558-9.966 22.757-9.966 10.112 0 17.655 3.237 22.63 9.712 4.97 6.475 7.52 16.166 7.647 29.072v15.995zm-15.425-17.265c0-8.674-1.185-15.033-3.554-19.075-2.37-4.04-6.137-6.062-11.3-6.062-5.035 0-8.738 1.915-11.107 5.745-2.37 3.83-3.62 9.807-3.746 17.932v20.948c0 8.633 1.206 15.064 3.618 19.297s6.2 6.348 11.362 6.348c4.95 0 8.61-1.957 10.98-5.87 2.37-3.915 3.62-10.04 3.746-18.378v-20.885z'/%3E%3C/g%3E%3C/svg%3E\\\");background-size:contain;background-color:rgba(0,0,0,.5)}.video-js .vjs-big-vr-play-button .vjs-icon-placeholder{display:none}:hover.video-js .vjs-big-vr-play-button{transition:border-color .4s,outline .4s,background-color .4s}.video-js .vjs-big-vr-play-button::before{content:''}.video-js canvas{cursor:move}.video-js .vjs-button-vr .vjs-icon-placeholder{height:30px;width:30px;display:inline-block;background:url(data:image/svg+xml;base64,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) no-repeat left center}\"],\"sourceRoot\":\"\"}]);\n// Exports\nexport default ___CSS_LOADER_EXPORT___;\n","\"use strict\";\n\n/*\n  MIT License http://www.opensource.org/licenses/mit-license.php\n  Author Tobias Koppers @sokra\n*/\n// css base code, injected by the css-loader\n// eslint-disable-next-line func-names\nmodule.exports = function (cssWithMappingToString) {\n  var list = []; // return the list of modules as css string\n\n  list.toString = function toString() {\n    return this.map(function (item) {\n      var content = cssWithMappingToString(item);\n\n      if (item[2]) {\n        return \"@media \".concat(item[2], \" {\").concat(content, \"}\");\n      }\n\n      return content;\n    }).join(\"\");\n  }; // import a list of modules into the list\n  // eslint-disable-next-line func-names\n\n\n  list.i = function (modules, mediaQuery, dedupe) {\n    if (typeof modules === \"string\") {\n      // eslint-disable-next-line no-param-reassign\n      modules = [[null, modules, \"\"]];\n    }\n\n    var alreadyImportedModules = {};\n\n    if (dedupe) {\n      for (var i = 0; i < this.length; i++) {\n        // eslint-disable-next-line prefer-destructuring\n        var id = this[i][0];\n\n        if (id != null) {\n          alreadyImportedModules[id] = true;\n        }\n      }\n    }\n\n    for (var _i = 0; _i < modules.length; _i++) {\n      var item = [].concat(modules[_i]);\n\n      if (dedupe && alreadyImportedModules[item[0]]) {\n        // eslint-disable-next-line no-continue\n        continue;\n      }\n\n      if (mediaQuery) {\n        if (!item[2]) {\n          item[2] = mediaQuery;\n        } else {\n          item[2] = \"\".concat(mediaQuery, \" and \").concat(item[2]);\n        }\n      }\n\n      list.push(item);\n    }\n  };\n\n  return list;\n};","\"use strict\";\n\nfunction _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest(); }\n\nfunction _nonIterableRest() { throw new TypeError(\"Invalid attempt to destructure non-iterable instance.\\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.\"); }\n\nfunction _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === \"string\") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === \"Object\" && o.constructor) n = o.constructor.name; if (n === \"Map\" || n === \"Set\") return Array.from(o); if (n === \"Arguments\" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }\n\nfunction _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }\n\nfunction _iterableToArrayLimit(arr, i) { var _i = arr && (typeof Symbol !== \"undefined\" && arr[Symbol.iterator] || arr[\"@@iterator\"]); if (_i == null) return; var _arr = []; var _n = true; var _d = false; var _s, _e; try { for (_i = _i.call(arr); !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i[\"return\"] != null) _i[\"return\"](); } finally { if (_d) throw _e; } } return _arr; }\n\nfunction _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }\n\nmodule.exports = function cssWithMappingToString(item) {\n  var _item = _slicedToArray(item, 4),\n      content = _item[1],\n      cssMapping = _item[3];\n\n  if (typeof btoa === \"function\") {\n    // eslint-disable-next-line no-undef\n    var base64 = btoa(unescape(encodeURIComponent(JSON.stringify(cssMapping))));\n    var data = \"sourceMappingURL=data:application/json;charset=utf-8;base64,\".concat(base64);\n    var sourceMapping = \"/*# \".concat(data, \" */\");\n    var sourceURLs = cssMapping.sources.map(function (source) {\n      return \"/*# sourceURL=\".concat(cssMapping.sourceRoot || \"\").concat(source, \" */\");\n    });\n    return [content].concat(sourceURLs).concat([sourceMapping]).join(\"\\n\");\n  }\n\n  return [content].join(\"\\n\");\n};","\"use strict\";\n\nmodule.exports = function (url, options) {\n  if (!options) {\n    // eslint-disable-next-line no-param-reassign\n    options = {};\n  } // eslint-disable-next-line no-underscore-dangle, no-param-reassign\n\n\n  url = url && url.__esModule ? url.default : url;\n\n  if (typeof url !== \"string\") {\n    return url;\n  } // If url is already wrapped in quotes, remove them\n\n\n  if (/^['\"].*['\"]$/.test(url)) {\n    // eslint-disable-next-line no-param-reassign\n    url = url.slice(1, -1);\n  }\n\n  if (options.hash) {\n    // eslint-disable-next-line no-param-reassign\n    url += options.hash;\n  } // Should url be wrapped?\n  // See https://drafts.csswg.org/css-values-3/#urls\n\n\n  if (/[\"'() \\t\\n]/.test(url) || options.needQuotes) {\n    return \"\\\"\".concat(url.replace(/\"/g, '\\\\\"').replace(/\\n/g, \"\\\\n\"), \"\\\"\");\n  }\n\n  return url;\n};","'use strict';\n\nvar isMergeableObject = function isMergeableObject(value) {\n\treturn isNonNullObject(value)\n\t\t&& !isSpecial(value)\n};\n\nfunction isNonNullObject(value) {\n\treturn !!value && typeof value === 'object'\n}\n\nfunction isSpecial(value) {\n\tvar stringValue = Object.prototype.toString.call(value);\n\n\treturn stringValue === '[object RegExp]'\n\t\t|| stringValue === '[object Date]'\n\t\t|| isReactElement(value)\n}\n\n// see https://github.com/facebook/react/blob/b5ac963fb791d1298e7f396236383bc955f916c1/src/isomorphic/classic/element/ReactElement.js#L21-L25\nvar canUseSymbol = typeof Symbol === 'function' && Symbol.for;\nvar REACT_ELEMENT_TYPE = canUseSymbol ? Symbol.for('react.element') : 0xeac7;\n\nfunction isReactElement(value) {\n\treturn value.$$typeof === REACT_ELEMENT_TYPE\n}\n\nfunction emptyTarget(val) {\n\treturn Array.isArray(val) ? [] : {}\n}\n\nfunction cloneUnlessOtherwiseSpecified(value, options) {\n\treturn (options.clone !== false && options.isMergeableObject(value))\n\t\t? deepmerge(emptyTarget(value), value, options)\n\t\t: value\n}\n\nfunction defaultArrayMerge(target, source, options) {\n\treturn target.concat(source).map(function(element) {\n\t\treturn cloneUnlessOtherwiseSpecified(element, options)\n\t})\n}\n\nfunction getMergeFunction(key, options) {\n\tif (!options.customMerge) {\n\t\treturn deepmerge\n\t}\n\tvar customMerge = options.customMerge(key);\n\treturn typeof customMerge === 'function' ? customMerge : deepmerge\n}\n\nfunction getEnumerableOwnPropertySymbols(target) {\n\treturn Object.getOwnPropertySymbols\n\t\t? Object.getOwnPropertySymbols(target).filter(function(symbol) {\n\t\t\treturn target.propertyIsEnumerable(symbol)\n\t\t})\n\t\t: []\n}\n\nfunction getKeys(target) {\n\treturn Object.keys(target).concat(getEnumerableOwnPropertySymbols(target))\n}\n\nfunction propertyIsOnObject(object, property) {\n\ttry {\n\t\treturn property in object\n\t} catch(_) {\n\t\treturn false\n\t}\n}\n\n// Protects from prototype poisoning and unexpected merging up the prototype chain.\nfunction propertyIsUnsafe(target, key) {\n\treturn propertyIsOnObject(target, key) // Properties are safe to merge if they don't exist in the target yet,\n\t\t&& !(Object.hasOwnProperty.call(target, key) // unsafe if they exist up the prototype chain,\n\t\t\t&& Object.propertyIsEnumerable.call(target, key)) // and also unsafe if they're nonenumerable.\n}\n\nfunction mergeObject(target, source, options) {\n\tvar destination = {};\n\tif (options.isMergeableObject(target)) {\n\t\tgetKeys(target).forEach(function(key) {\n\t\t\tdestination[key] = cloneUnlessOtherwiseSpecified(target[key], options);\n\t\t});\n\t}\n\tgetKeys(source).forEach(function(key) {\n\t\tif (propertyIsUnsafe(target, key)) {\n\t\t\treturn\n\t\t}\n\n\t\tif (propertyIsOnObject(target, key) && options.isMergeableObject(source[key])) {\n\t\t\tdestination[key] = getMergeFunction(key, options)(target[key], source[key], options);\n\t\t} else {\n\t\t\tdestination[key] = cloneUnlessOtherwiseSpecified(source[key], options);\n\t\t}\n\t});\n\treturn destination\n}\n\nfunction deepmerge(target, source, options) {\n\toptions = options || {};\n\toptions.arrayMerge = options.arrayMerge || defaultArrayMerge;\n\toptions.isMergeableObject = options.isMergeableObject || isMergeableObject;\n\t// cloneUnlessOtherwiseSpecified is added to `options` so that custom arrayMerge()\n\t// implementations can use it. The caller may not replace it.\n\toptions.cloneUnlessOtherwiseSpecified = cloneUnlessOtherwiseSpecified;\n\n\tvar sourceIsArray = Array.isArray(source);\n\tvar targetIsArray = Array.isArray(target);\n\tvar sourceAndTargetTypesMatch = sourceIsArray === targetIsArray;\n\n\tif (!sourceAndTargetTypesMatch) {\n\t\treturn cloneUnlessOtherwiseSpecified(source, options)\n\t} else if (sourceIsArray) {\n\t\treturn options.arrayMerge(target, source, options)\n\t} else {\n\t\treturn mergeObject(target, source, options)\n\t}\n}\n\ndeepmerge.all = function deepmergeAll(array, options) {\n\tif (!Array.isArray(array)) {\n\t\tthrow new Error('first argument should be an array')\n\t}\n\n\treturn array.reduce(function(prev, next) {\n\t\treturn deepmerge(prev, next, options)\n\t}, {})\n};\n\nvar deepmerge_1 = deepmerge;\n\nmodule.exports = deepmerge_1;\n","var topLevel = typeof global !== 'undefined' ? global :\n    typeof window !== 'undefined' ? window : {}\nvar minDoc = require('min-document');\n\nvar doccy;\n\nif (typeof document !== 'undefined') {\n    doccy = document;\n} else {\n    doccy = topLevel['__GLOBAL_DOCUMENT_CACHE@4'];\n\n    if (!doccy) {\n        doccy = topLevel['__GLOBAL_DOCUMENT_CACHE@4'] = minDoc;\n    }\n}\n\nmodule.exports = doccy;\n","var win;\n\nif (typeof window !== \"undefined\") {\n    win = window;\n} else if (typeof global !== \"undefined\") {\n    win = global;\n} else if (typeof self !== \"undefined\"){\n    win = self;\n} else {\n    win = {};\n}\n\nmodule.exports = win;\n","module.exports = isFunction\n\nvar toString = Object.prototype.toString\n\nfunction isFunction (fn) {\n  if (!fn) {\n    return false\n  }\n  var string = toString.call(fn)\n  return string === '[object Function]' ||\n    (typeof fn === 'function' && string !== '[object RegExp]') ||\n    (typeof window !== 'undefined' &&\n     // IE8 and below\n     (fn === window.setTimeout ||\n      fn === window.alert ||\n      fn === window.confirm ||\n      fn === window.prompt))\n};\n","/*!\n * is-plain-object <https://github.com/jonschlinkert/is-plain-object>\n *\n * Copyright (c) 2014-2017, Jon Schlinkert.\n * Released under the MIT License.\n */\n\nfunction isObject(o) {\n  return Object.prototype.toString.call(o) === '[object Object]';\n}\n\nfunction isPlainObject(o) {\n  var ctor,prot;\n\n  if (isObject(o) === false) return false;\n\n  // If has modified constructor\n  ctor = o.constructor;\n  if (ctor === undefined) return true;\n\n  // If has modified prototype\n  prot = ctor.prototype;\n  if (isObject(prot) === false) return false;\n\n  // If constructor does not have an Object-specific method\n  if (prot.hasOwnProperty('isPrototypeOf') === false) {\n    return false;\n  }\n\n  // Most likely a plain Object\n  return true;\n}\n\nexport { isPlainObject };\n","// Source: http://jsfiddle.net/vWx8V/\n// http://stackoverflow.com/questions/5603195/full-list-of-javascript-keycodes\n\n/**\n * Conenience method returns corresponding value for given keyName or keyCode.\n *\n * @param {Mixed} keyCode {Number} or keyName {String}\n * @return {Mixed}\n * @api public\n */\n\nfunction keyCode(searchInput) {\n  // Keyboard Events\n  if (searchInput && 'object' === typeof searchInput) {\n    var hasKeyCode = searchInput.which || searchInput.keyCode || searchInput.charCode\n    if (hasKeyCode) searchInput = hasKeyCode\n  }\n\n  // Numbers\n  if ('number' === typeof searchInput) return names[searchInput]\n\n  // Everything else (cast to string)\n  var search = String(searchInput)\n\n  // check codes\n  var foundNamedKey = codes[search.toLowerCase()]\n  if (foundNamedKey) return foundNamedKey\n\n  // check aliases\n  var foundNamedKey = aliases[search.toLowerCase()]\n  if (foundNamedKey) return foundNamedKey\n\n  // weird character?\n  if (search.length === 1) return search.charCodeAt(0)\n\n  return undefined\n}\n\n/**\n * Compares a keyboard event with a given keyCode or keyName.\n *\n * @param {Event} event Keyboard event that should be tested\n * @param {Mixed} keyCode {Number} or keyName {String}\n * @return {Boolean}\n * @api public\n */\nkeyCode.isEventKey = function isEventKey(event, nameOrCode) {\n  if (event && 'object' === typeof event) {\n    var keyCode = event.which || event.keyCode || event.charCode\n    if (keyCode === null || keyCode === undefined) { return false; }\n    if (typeof nameOrCode === 'string') {\n      // check codes\n      var foundNamedKey = codes[nameOrCode.toLowerCase()]\n      if (foundNamedKey) { return foundNamedKey === keyCode; }\n    \n      // check aliases\n      var foundNamedKey = aliases[nameOrCode.toLowerCase()]\n      if (foundNamedKey) { return foundNamedKey === keyCode; }\n    } else if (typeof nameOrCode === 'number') {\n      return nameOrCode === keyCode;\n    }\n    return false;\n  }\n}\n\nexports = module.exports = keyCode;\n\n/**\n * Get by name\n *\n *   exports.code['enter'] // => 13\n */\n\nvar codes = exports.code = exports.codes = {\n  'backspace': 8,\n  'tab': 9,\n  'enter': 13,\n  'shift': 16,\n  'ctrl': 17,\n  'alt': 18,\n  'pause/break': 19,\n  'caps lock': 20,\n  'esc': 27,\n  'space': 32,\n  'page up': 33,\n  'page down': 34,\n  'end': 35,\n  'home': 36,\n  'left': 37,\n  'up': 38,\n  'right': 39,\n  'down': 40,\n  'insert': 45,\n  'delete': 46,\n  'command': 91,\n  'left command': 91,\n  'right command': 93,\n  'numpad *': 106,\n  'numpad +': 107,\n  'numpad -': 109,\n  'numpad .': 110,\n  'numpad /': 111,\n  'num lock': 144,\n  'scroll lock': 145,\n  'my computer': 182,\n  'my calculator': 183,\n  ';': 186,\n  '=': 187,\n  ',': 188,\n  '-': 189,\n  '.': 190,\n  '/': 191,\n  '`': 192,\n  '[': 219,\n  '\\\\': 220,\n  ']': 221,\n  \"'\": 222\n}\n\n// Helper aliases\n\nvar aliases = exports.aliases = {\n  'windows': 91,\n  '⇧': 16,\n  '⌥': 18,\n  '⌃': 17,\n  '⌘': 91,\n  'ctl': 17,\n  'control': 17,\n  'option': 18,\n  'pause': 19,\n  'break': 19,\n  'caps': 20,\n  'return': 13,\n  'escape': 27,\n  'spc': 32,\n  'spacebar': 32,\n  'pgup': 33,\n  'pgdn': 34,\n  'ins': 45,\n  'del': 46,\n  'cmd': 91\n}\n\n/*!\n * Programatically add the following\n */\n\n// lower case chars\nfor (i = 97; i < 123; i++) codes[String.fromCharCode(i)] = i - 32\n\n// numbers\nfor (var i = 48; i < 58; i++) codes[i - 48] = i\n\n// function keys\nfor (i = 1; i < 13; i++) codes['f'+i] = i + 111\n\n// numpad keys\nfor (i = 0; i < 10; i++) codes['numpad '+i] = i + 96\n\n/**\n * Get by code\n *\n *   exports.name[13] // => 'Enter'\n */\n\nvar names = exports.names = exports.title = {} // title for backward compat\n\n// Create reverse mapping\nfor (i in codes) names[codes[i]] = i\n\n// Add aliases\nfor (var alias in aliases) {\n  codes[alias] = aliases[alias]\n}\n","/**\n * marked - a markdown parser\n * Copyright (c) 2011-2021, Christopher Jeffrey. (MIT Licensed)\n * https://github.com/markedjs/marked\n */\n\n/**\n * DO NOT EDIT THIS FILE\n * The code in this file is generated from files in ./src/\n */\n\n(function (global, factory) {\n  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :\n  typeof define === 'function' && define.amd ? define(factory) :\n  (global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.marked = factory());\n}(this, (function () { 'use strict';\n\n  function _defineProperties(target, props) {\n    for (var i = 0; i < props.length; i++) {\n      var descriptor = props[i];\n      descriptor.enumerable = descriptor.enumerable || false;\n      descriptor.configurable = true;\n      if (\"value\" in descriptor) descriptor.writable = true;\n      Object.defineProperty(target, descriptor.key, descriptor);\n    }\n  }\n\n  function _createClass(Constructor, protoProps, staticProps) {\n    if (protoProps) _defineProperties(Constructor.prototype, protoProps);\n    if (staticProps) _defineProperties(Constructor, staticProps);\n    return Constructor;\n  }\n\n  function _unsupportedIterableToArray(o, minLen) {\n    if (!o) return;\n    if (typeof o === \"string\") return _arrayLikeToArray(o, minLen);\n    var n = Object.prototype.toString.call(o).slice(8, -1);\n    if (n === \"Object\" && o.constructor) n = o.constructor.name;\n    if (n === \"Map\" || n === \"Set\") return Array.from(o);\n    if (n === \"Arguments\" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen);\n  }\n\n  function _arrayLikeToArray(arr, len) {\n    if (len == null || len > arr.length) len = arr.length;\n\n    for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i];\n\n    return arr2;\n  }\n\n  function _createForOfIteratorHelperLoose(o, allowArrayLike) {\n    var it = typeof Symbol !== \"undefined\" && o[Symbol.iterator] || o[\"@@iterator\"];\n    if (it) return (it = it.call(o)).next.bind(it);\n\n    if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === \"number\") {\n      if (it) o = it;\n      var i = 0;\n      return function () {\n        if (i >= o.length) return {\n          done: true\n        };\n        return {\n          done: false,\n          value: o[i++]\n        };\n      };\n    }\n\n    throw new TypeError(\"Invalid attempt to iterate non-iterable instance.\\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.\");\n  }\n\n  var defaults$5 = {exports: {}};\n\n  function getDefaults$1() {\n    return {\n      baseUrl: null,\n      breaks: false,\n      gfm: true,\n      headerIds: true,\n      headerPrefix: '',\n      highlight: null,\n      langPrefix: 'language-',\n      mangle: true,\n      pedantic: false,\n      renderer: null,\n      sanitize: false,\n      sanitizer: null,\n      silent: false,\n      smartLists: false,\n      smartypants: false,\n      tokenizer: null,\n      walkTokens: null,\n      xhtml: false\n    };\n  }\n\n  function changeDefaults$1(newDefaults) {\n    defaults$5.exports.defaults = newDefaults;\n  }\n\n  defaults$5.exports = {\n    defaults: getDefaults$1(),\n    getDefaults: getDefaults$1,\n    changeDefaults: changeDefaults$1\n  };\n\n  /**\n   * Helpers\n   */\n  var escapeTest = /[&<>\"']/;\n  var escapeReplace = /[&<>\"']/g;\n  var escapeTestNoEncode = /[<>\"']|&(?!#?\\w+;)/;\n  var escapeReplaceNoEncode = /[<>\"']|&(?!#?\\w+;)/g;\n  var escapeReplacements = {\n    '&': '&amp;',\n    '<': '&lt;',\n    '>': '&gt;',\n    '\"': '&quot;',\n    \"'\": '&#39;'\n  };\n\n  var getEscapeReplacement = function getEscapeReplacement(ch) {\n    return escapeReplacements[ch];\n  };\n\n  function escape$2(html, encode) {\n    if (encode) {\n      if (escapeTest.test(html)) {\n        return html.replace(escapeReplace, getEscapeReplacement);\n      }\n    } else {\n      if (escapeTestNoEncode.test(html)) {\n        return html.replace(escapeReplaceNoEncode, getEscapeReplacement);\n      }\n    }\n\n    return html;\n  }\n\n  var unescapeTest = /&(#(?:\\d+)|(?:#x[0-9A-Fa-f]+)|(?:\\w+));?/ig;\n\n  function unescape$1(html) {\n    // explicitly match decimal, hex, and named HTML entities\n    return html.replace(unescapeTest, function (_, n) {\n      n = n.toLowerCase();\n      if (n === 'colon') return ':';\n\n      if (n.charAt(0) === '#') {\n        return n.charAt(1) === 'x' ? String.fromCharCode(parseInt(n.substring(2), 16)) : String.fromCharCode(+n.substring(1));\n      }\n\n      return '';\n    });\n  }\n\n  var caret = /(^|[^\\[])\\^/g;\n\n  function edit$1(regex, opt) {\n    regex = regex.source || regex;\n    opt = opt || '';\n    var obj = {\n      replace: function replace(name, val) {\n        val = val.source || val;\n        val = val.replace(caret, '$1');\n        regex = regex.replace(name, val);\n        return obj;\n      },\n      getRegex: function getRegex() {\n        return new RegExp(regex, opt);\n      }\n    };\n    return obj;\n  }\n\n  var nonWordAndColonTest = /[^\\w:]/g;\n  var originIndependentUrl = /^$|^[a-z][a-z0-9+.-]*:|^[?#]/i;\n\n  function cleanUrl$1(sanitize, base, href) {\n    if (sanitize) {\n      var prot;\n\n      try {\n        prot = decodeURIComponent(unescape$1(href)).replace(nonWordAndColonTest, '').toLowerCase();\n      } catch (e) {\n        return null;\n      }\n\n      if (prot.indexOf('javascript:') === 0 || prot.indexOf('vbscript:') === 0 || prot.indexOf('data:') === 0) {\n        return null;\n      }\n    }\n\n    if (base && !originIndependentUrl.test(href)) {\n      href = resolveUrl(base, href);\n    }\n\n    try {\n      href = encodeURI(href).replace(/%25/g, '%');\n    } catch (e) {\n      return null;\n    }\n\n    return href;\n  }\n\n  var baseUrls = {};\n  var justDomain = /^[^:]+:\\/*[^/]*$/;\n  var protocol = /^([^:]+:)[\\s\\S]*$/;\n  var domain = /^([^:]+:\\/*[^/]*)[\\s\\S]*$/;\n\n  function resolveUrl(base, href) {\n    if (!baseUrls[' ' + base]) {\n      // we can ignore everything in base after the last slash of its path component,\n      // but we might need to add _that_\n      // https://tools.ietf.org/html/rfc3986#section-3\n      if (justDomain.test(base)) {\n        baseUrls[' ' + base] = base + '/';\n      } else {\n        baseUrls[' ' + base] = rtrim$1(base, '/', true);\n      }\n    }\n\n    base = baseUrls[' ' + base];\n    var relativeBase = base.indexOf(':') === -1;\n\n    if (href.substring(0, 2) === '//') {\n      if (relativeBase) {\n        return href;\n      }\n\n      return base.replace(protocol, '$1') + href;\n    } else if (href.charAt(0) === '/') {\n      if (relativeBase) {\n        return href;\n      }\n\n      return base.replace(domain, '$1') + href;\n    } else {\n      return base + href;\n    }\n  }\n\n  var noopTest$1 = {\n    exec: function noopTest() {}\n  };\n\n  function merge$2(obj) {\n    var i = 1,\n        target,\n        key;\n\n    for (; i < arguments.length; i++) {\n      target = arguments[i];\n\n      for (key in target) {\n        if (Object.prototype.hasOwnProperty.call(target, key)) {\n          obj[key] = target[key];\n        }\n      }\n    }\n\n    return obj;\n  }\n\n  function splitCells$1(tableRow, count) {\n    // ensure that every cell-delimiting pipe has a space\n    // before it to distinguish it from an escaped pipe\n    var row = tableRow.replace(/\\|/g, function (match, offset, str) {\n      var escaped = false,\n          curr = offset;\n\n      while (--curr >= 0 && str[curr] === '\\\\') {\n        escaped = !escaped;\n      }\n\n      if (escaped) {\n        // odd number of slashes means | is escaped\n        // so we leave it alone\n        return '|';\n      } else {\n        // add space before unescaped |\n        return ' |';\n      }\n    }),\n        cells = row.split(/ \\|/);\n    var i = 0;\n\n    if (cells.length > count) {\n      cells.splice(count);\n    } else {\n      while (cells.length < count) {\n        cells.push('');\n      }\n    }\n\n    for (; i < cells.length; i++) {\n      // leading or trailing whitespace is ignored per the gfm spec\n      cells[i] = cells[i].trim().replace(/\\\\\\|/g, '|');\n    }\n\n    return cells;\n  } // Remove trailing 'c's. Equivalent to str.replace(/c*$/, '').\n  // /c*$/ is vulnerable to REDOS.\n  // invert: Remove suffix of non-c chars instead. Default falsey.\n\n\n  function rtrim$1(str, c, invert) {\n    var l = str.length;\n\n    if (l === 0) {\n      return '';\n    } // Length of suffix matching the invert condition.\n\n\n    var suffLen = 0; // Step left until we fail to match the invert condition.\n\n    while (suffLen < l) {\n      var currChar = str.charAt(l - suffLen - 1);\n\n      if (currChar === c && !invert) {\n        suffLen++;\n      } else if (currChar !== c && invert) {\n        suffLen++;\n      } else {\n        break;\n      }\n    }\n\n    return str.substr(0, l - suffLen);\n  }\n\n  function findClosingBracket$1(str, b) {\n    if (str.indexOf(b[1]) === -1) {\n      return -1;\n    }\n\n    var l = str.length;\n    var level = 0,\n        i = 0;\n\n    for (; i < l; i++) {\n      if (str[i] === '\\\\') {\n        i++;\n      } else if (str[i] === b[0]) {\n        level++;\n      } else if (str[i] === b[1]) {\n        level--;\n\n        if (level < 0) {\n          return i;\n        }\n      }\n    }\n\n    return -1;\n  }\n\n  function checkSanitizeDeprecation$1(opt) {\n    if (opt && opt.sanitize && !opt.silent) {\n      console.warn('marked(): sanitize and sanitizer parameters are deprecated since version 0.7.0, should not be used and will be removed in the future. Read more here: https://marked.js.org/#/USING_ADVANCED.md#options');\n    }\n  } // copied from https://stackoverflow.com/a/5450113/806777\n\n\n  function repeatString$1(pattern, count) {\n    if (count < 1) {\n      return '';\n    }\n\n    var result = '';\n\n    while (count > 1) {\n      if (count & 1) {\n        result += pattern;\n      }\n\n      count >>= 1;\n      pattern += pattern;\n    }\n\n    return result + pattern;\n  }\n\n  var helpers = {\n    escape: escape$2,\n    unescape: unescape$1,\n    edit: edit$1,\n    cleanUrl: cleanUrl$1,\n    resolveUrl: resolveUrl,\n    noopTest: noopTest$1,\n    merge: merge$2,\n    splitCells: splitCells$1,\n    rtrim: rtrim$1,\n    findClosingBracket: findClosingBracket$1,\n    checkSanitizeDeprecation: checkSanitizeDeprecation$1,\n    repeatString: repeatString$1\n  };\n\n  var defaults$4 = defaults$5.exports.defaults;\n  var rtrim = helpers.rtrim,\n      splitCells = helpers.splitCells,\n      _escape = helpers.escape,\n      findClosingBracket = helpers.findClosingBracket;\n\n  function outputLink(cap, link, raw) {\n    var href = link.href;\n    var title = link.title ? _escape(link.title) : null;\n    var text = cap[1].replace(/\\\\([\\[\\]])/g, '$1');\n\n    if (cap[0].charAt(0) !== '!') {\n      return {\n        type: 'link',\n        raw: raw,\n        href: href,\n        title: title,\n        text: text\n      };\n    } else {\n      return {\n        type: 'image',\n        raw: raw,\n        href: href,\n        title: title,\n        text: _escape(text)\n      };\n    }\n  }\n\n  function indentCodeCompensation(raw, text) {\n    var matchIndentToCode = raw.match(/^(\\s+)(?:```)/);\n\n    if (matchIndentToCode === null) {\n      return text;\n    }\n\n    var indentToCode = matchIndentToCode[1];\n    return text.split('\\n').map(function (node) {\n      var matchIndentInNode = node.match(/^\\s+/);\n\n      if (matchIndentInNode === null) {\n        return node;\n      }\n\n      var indentInNode = matchIndentInNode[0];\n\n      if (indentInNode.length >= indentToCode.length) {\n        return node.slice(indentToCode.length);\n      }\n\n      return node;\n    }).join('\\n');\n  }\n  /**\n   * Tokenizer\n   */\n\n\n  var Tokenizer_1 = /*#__PURE__*/function () {\n    function Tokenizer(options) {\n      this.options = options || defaults$4;\n    }\n\n    var _proto = Tokenizer.prototype;\n\n    _proto.space = function space(src) {\n      var cap = this.rules.block.newline.exec(src);\n\n      if (cap) {\n        if (cap[0].length > 1) {\n          return {\n            type: 'space',\n            raw: cap[0]\n          };\n        }\n\n        return {\n          raw: '\\n'\n        };\n      }\n    };\n\n    _proto.code = function code(src) {\n      var cap = this.rules.block.code.exec(src);\n\n      if (cap) {\n        var text = cap[0].replace(/^ {1,4}/gm, '');\n        return {\n          type: 'code',\n          raw: cap[0],\n          codeBlockStyle: 'indented',\n          text: !this.options.pedantic ? rtrim(text, '\\n') : text\n        };\n      }\n    };\n\n    _proto.fences = function fences(src) {\n      var cap = this.rules.block.fences.exec(src);\n\n      if (cap) {\n        var raw = cap[0];\n        var text = indentCodeCompensation(raw, cap[3] || '');\n        return {\n          type: 'code',\n          raw: raw,\n          lang: cap[2] ? cap[2].trim() : cap[2],\n          text: text\n        };\n      }\n    };\n\n    _proto.heading = function heading(src) {\n      var cap = this.rules.block.heading.exec(src);\n\n      if (cap) {\n        var text = cap[2].trim(); // remove trailing #s\n\n        if (/#$/.test(text)) {\n          var trimmed = rtrim(text, '#');\n\n          if (this.options.pedantic) {\n            text = trimmed.trim();\n          } else if (!trimmed || / $/.test(trimmed)) {\n            // CommonMark requires space before trailing #s\n            text = trimmed.trim();\n          }\n        }\n\n        return {\n          type: 'heading',\n          raw: cap[0],\n          depth: cap[1].length,\n          text: text\n        };\n      }\n    };\n\n    _proto.nptable = function nptable(src) {\n      var cap = this.rules.block.nptable.exec(src);\n\n      if (cap) {\n        var item = {\n          type: 'table',\n          header: splitCells(cap[1].replace(/^ *| *\\| *$/g, '')),\n          align: cap[2].replace(/^ *|\\| *$/g, '').split(/ *\\| */),\n          cells: cap[3] ? cap[3].replace(/\\n$/, '').split('\\n') : [],\n          raw: cap[0]\n        };\n\n        if (item.header.length === item.align.length) {\n          var l = item.align.length;\n          var i;\n\n          for (i = 0; i < l; i++) {\n            if (/^ *-+: *$/.test(item.align[i])) {\n              item.align[i] = 'right';\n            } else if (/^ *:-+: *$/.test(item.align[i])) {\n              item.align[i] = 'center';\n            } else if (/^ *:-+ *$/.test(item.align[i])) {\n              item.align[i] = 'left';\n            } else {\n              item.align[i] = null;\n            }\n          }\n\n          l = item.cells.length;\n\n          for (i = 0; i < l; i++) {\n            item.cells[i] = splitCells(item.cells[i], item.header.length);\n          }\n\n          return item;\n        }\n      }\n    };\n\n    _proto.hr = function hr(src) {\n      var cap = this.rules.block.hr.exec(src);\n\n      if (cap) {\n        return {\n          type: 'hr',\n          raw: cap[0]\n        };\n      }\n    };\n\n    _proto.blockquote = function blockquote(src) {\n      var cap = this.rules.block.blockquote.exec(src);\n\n      if (cap) {\n        var text = cap[0].replace(/^ *> ?/gm, '');\n        return {\n          type: 'blockquote',\n          raw: cap[0],\n          text: text\n        };\n      }\n    };\n\n    _proto.list = function list(src) {\n      var cap = this.rules.block.list.exec(src);\n\n      if (cap) {\n        var raw = cap[0];\n        var bull = cap[2];\n        var isordered = bull.length > 1;\n        var list = {\n          type: 'list',\n          raw: raw,\n          ordered: isordered,\n          start: isordered ? +bull.slice(0, -1) : '',\n          loose: false,\n          items: []\n        }; // Get each top-level item.\n\n        var itemMatch = cap[0].match(this.rules.block.item);\n        var next = false,\n            item,\n            space,\n            bcurr,\n            bnext,\n            addBack,\n            loose,\n            istask,\n            ischecked,\n            endMatch;\n        var l = itemMatch.length;\n        bcurr = this.rules.block.listItemStart.exec(itemMatch[0]);\n\n        for (var i = 0; i < l; i++) {\n          item = itemMatch[i];\n          raw = item;\n\n          if (!this.options.pedantic) {\n            // Determine if current item contains the end of the list\n            endMatch = item.match(new RegExp('\\\\n\\\\s*\\\\n {0,' + (bcurr[0].length - 1) + '}\\\\S'));\n\n            if (endMatch) {\n              addBack = item.length - endMatch.index + itemMatch.slice(i + 1).join('\\n').length;\n              list.raw = list.raw.substring(0, list.raw.length - addBack);\n              item = item.substring(0, endMatch.index);\n              raw = item;\n              l = i + 1;\n            }\n          } // Determine whether the next list item belongs here.\n          // Backpedal if it does not belong in this list.\n\n\n          if (i !== l - 1) {\n            bnext = this.rules.block.listItemStart.exec(itemMatch[i + 1]);\n\n            if (!this.options.pedantic ? bnext[1].length >= bcurr[0].length || bnext[1].length > 3 : bnext[1].length > bcurr[1].length) {\n              // nested list or continuation\n              itemMatch.splice(i, 2, itemMatch[i] + (!this.options.pedantic && bnext[1].length < bcurr[0].length && !itemMatch[i].match(/\\n$/) ? '' : '\\n') + itemMatch[i + 1]);\n              i--;\n              l--;\n              continue;\n            } else if ( // different bullet style\n            !this.options.pedantic || this.options.smartLists ? bnext[2][bnext[2].length - 1] !== bull[bull.length - 1] : isordered === (bnext[2].length === 1)) {\n              addBack = itemMatch.slice(i + 1).join('\\n').length;\n              list.raw = list.raw.substring(0, list.raw.length - addBack);\n              i = l - 1;\n            }\n\n            bcurr = bnext;\n          } // Remove the list item's bullet\n          // so it is seen as the next token.\n\n\n          space = item.length;\n          item = item.replace(/^ *([*+-]|\\d+[.)]) ?/, ''); // Outdent whatever the\n          // list item contains. Hacky.\n\n          if (~item.indexOf('\\n ')) {\n            space -= item.length;\n            item = !this.options.pedantic ? item.replace(new RegExp('^ {1,' + space + '}', 'gm'), '') : item.replace(/^ {1,4}/gm, '');\n          } // trim item newlines at end\n\n\n          item = rtrim(item, '\\n');\n\n          if (i !== l - 1) {\n            raw = raw + '\\n';\n          } // Determine whether item is loose or not.\n          // Use: /(^|\\n)(?! )[^\\n]+\\n\\n(?!\\s*$)/\n          // for discount behavior.\n\n\n          loose = next || /\\n\\n(?!\\s*$)/.test(raw);\n\n          if (i !== l - 1) {\n            next = raw.slice(-2) === '\\n\\n';\n            if (!loose) loose = next;\n          }\n\n          if (loose) {\n            list.loose = true;\n          } // Check for task list items\n\n\n          if (this.options.gfm) {\n            istask = /^\\[[ xX]\\] /.test(item);\n            ischecked = undefined;\n\n            if (istask) {\n              ischecked = item[1] !== ' ';\n              item = item.replace(/^\\[[ xX]\\] +/, '');\n            }\n          }\n\n          list.items.push({\n            type: 'list_item',\n            raw: raw,\n            task: istask,\n            checked: ischecked,\n            loose: loose,\n            text: item\n          });\n        }\n\n        return list;\n      }\n    };\n\n    _proto.html = function html(src) {\n      var cap = this.rules.block.html.exec(src);\n\n      if (cap) {\n        return {\n          type: this.options.sanitize ? 'paragraph' : 'html',\n          raw: cap[0],\n          pre: !this.options.sanitizer && (cap[1] === 'pre' || cap[1] === 'script' || cap[1] === 'style'),\n          text: this.options.sanitize ? this.options.sanitizer ? this.options.sanitizer(cap[0]) : _escape(cap[0]) : cap[0]\n        };\n      }\n    };\n\n    _proto.def = function def(src) {\n      var cap = this.rules.block.def.exec(src);\n\n      if (cap) {\n        if (cap[3]) cap[3] = cap[3].substring(1, cap[3].length - 1);\n        var tag = cap[1].toLowerCase().replace(/\\s+/g, ' ');\n        return {\n          type: 'def',\n          tag: tag,\n          raw: cap[0],\n          href: cap[2],\n          title: cap[3]\n        };\n      }\n    };\n\n    _proto.table = function table(src) {\n      var cap = this.rules.block.table.exec(src);\n\n      if (cap) {\n        var item = {\n          type: 'table',\n          header: splitCells(cap[1].replace(/^ *| *\\| *$/g, '')),\n          align: cap[2].replace(/^ *|\\| *$/g, '').split(/ *\\| */),\n          cells: cap[3] ? cap[3].replace(/\\n$/, '').split('\\n') : []\n        };\n\n        if (item.header.length === item.align.length) {\n          item.raw = cap[0];\n          var l = item.align.length;\n          var i;\n\n          for (i = 0; i < l; i++) {\n            if (/^ *-+: *$/.test(item.align[i])) {\n              item.align[i] = 'right';\n            } else if (/^ *:-+: *$/.test(item.align[i])) {\n              item.align[i] = 'center';\n            } else if (/^ *:-+ *$/.test(item.align[i])) {\n              item.align[i] = 'left';\n            } else {\n              item.align[i] = null;\n            }\n          }\n\n          l = item.cells.length;\n\n          for (i = 0; i < l; i++) {\n            item.cells[i] = splitCells(item.cells[i].replace(/^ *\\| *| *\\| *$/g, ''), item.header.length);\n          }\n\n          return item;\n        }\n      }\n    };\n\n    _proto.lheading = function lheading(src) {\n      var cap = this.rules.block.lheading.exec(src);\n\n      if (cap) {\n        return {\n          type: 'heading',\n          raw: cap[0],\n          depth: cap[2].charAt(0) === '=' ? 1 : 2,\n          text: cap[1]\n        };\n      }\n    };\n\n    _proto.paragraph = function paragraph(src) {\n      var cap = this.rules.block.paragraph.exec(src);\n\n      if (cap) {\n        return {\n          type: 'paragraph',\n          raw: cap[0],\n          text: cap[1].charAt(cap[1].length - 1) === '\\n' ? cap[1].slice(0, -1) : cap[1]\n        };\n      }\n    };\n\n    _proto.text = function text(src) {\n      var cap = this.rules.block.text.exec(src);\n\n      if (cap) {\n        return {\n          type: 'text',\n          raw: cap[0],\n          text: cap[0]\n        };\n      }\n    };\n\n    _proto.escape = function escape(src) {\n      var cap = this.rules.inline.escape.exec(src);\n\n      if (cap) {\n        return {\n          type: 'escape',\n          raw: cap[0],\n          text: _escape(cap[1])\n        };\n      }\n    };\n\n    _proto.tag = function tag(src, inLink, inRawBlock) {\n      var cap = this.rules.inline.tag.exec(src);\n\n      if (cap) {\n        if (!inLink && /^<a /i.test(cap[0])) {\n          inLink = true;\n        } else if (inLink && /^<\\/a>/i.test(cap[0])) {\n          inLink = false;\n        }\n\n        if (!inRawBlock && /^<(pre|code|kbd|script)(\\s|>)/i.test(cap[0])) {\n          inRawBlock = true;\n        } else if (inRawBlock && /^<\\/(pre|code|kbd|script)(\\s|>)/i.test(cap[0])) {\n          inRawBlock = false;\n        }\n\n        return {\n          type: this.options.sanitize ? 'text' : 'html',\n          raw: cap[0],\n          inLink: inLink,\n          inRawBlock: inRawBlock,\n          text: this.options.sanitize ? this.options.sanitizer ? this.options.sanitizer(cap[0]) : _escape(cap[0]) : cap[0]\n        };\n      }\n    };\n\n    _proto.link = function link(src) {\n      var cap = this.rules.inline.link.exec(src);\n\n      if (cap) {\n        var trimmedUrl = cap[2].trim();\n\n        if (!this.options.pedantic && /^</.test(trimmedUrl)) {\n          // commonmark requires matching angle brackets\n          if (!/>$/.test(trimmedUrl)) {\n            return;\n          } // ending angle bracket cannot be escaped\n\n\n          var rtrimSlash = rtrim(trimmedUrl.slice(0, -1), '\\\\');\n\n          if ((trimmedUrl.length - rtrimSlash.length) % 2 === 0) {\n            return;\n          }\n        } else {\n          // find closing parenthesis\n          var lastParenIndex = findClosingBracket(cap[2], '()');\n\n          if (lastParenIndex > -1) {\n            var start = cap[0].indexOf('!') === 0 ? 5 : 4;\n            var linkLen = start + cap[1].length + lastParenIndex;\n            cap[2] = cap[2].substring(0, lastParenIndex);\n            cap[0] = cap[0].substring(0, linkLen).trim();\n            cap[3] = '';\n          }\n        }\n\n        var href = cap[2];\n        var title = '';\n\n        if (this.options.pedantic) {\n          // split pedantic href and title\n          var link = /^([^'\"]*[^\\s])\\s+(['\"])(.*)\\2/.exec(href);\n\n          if (link) {\n            href = link[1];\n            title = link[3];\n          }\n        } else {\n          title = cap[3] ? cap[3].slice(1, -1) : '';\n        }\n\n        href = href.trim();\n\n        if (/^</.test(href)) {\n          if (this.options.pedantic && !/>$/.test(trimmedUrl)) {\n            // pedantic allows starting angle bracket without ending angle bracket\n            href = href.slice(1);\n          } else {\n            href = href.slice(1, -1);\n          }\n        }\n\n        return outputLink(cap, {\n          href: href ? href.replace(this.rules.inline._escapes, '$1') : href,\n          title: title ? title.replace(this.rules.inline._escapes, '$1') : title\n        }, cap[0]);\n      }\n    };\n\n    _proto.reflink = function reflink(src, links) {\n      var cap;\n\n      if ((cap = this.rules.inline.reflink.exec(src)) || (cap = this.rules.inline.nolink.exec(src))) {\n        var link = (cap[2] || cap[1]).replace(/\\s+/g, ' ');\n        link = links[link.toLowerCase()];\n\n        if (!link || !link.href) {\n          var text = cap[0].charAt(0);\n          return {\n            type: 'text',\n            raw: text,\n            text: text\n          };\n        }\n\n        return outputLink(cap, link, cap[0]);\n      }\n    };\n\n    _proto.emStrong = function emStrong(src, maskedSrc, prevChar) {\n      if (prevChar === void 0) {\n        prevChar = '';\n      }\n\n      var match = this.rules.inline.emStrong.lDelim.exec(src);\n      if (!match) return; // _ can't be between two alphanumerics. \\p{L}\\p{N} includes non-english alphabet/numbers as well\n\n      if (match[3] && prevChar.match(/(?:[0-9A-Za-z\\xAA\\xB2\\xB3\\xB5\\xB9\\xBA\\xBC-\\xBE\\xC0-\\xD6\\xD8-\\xF6\\xF8-\\u02C1\\u02C6-\\u02D1\\u02E0-\\u02E4\\u02EC\\u02EE\\u0370-\\u0374\\u0376\\u0377\\u037A-\\u037D\\u037F\\u0386\\u0388-\\u038A\\u038C\\u038E-\\u03A1\\u03A3-\\u03F5\\u03F7-\\u0481\\u048A-\\u052F\\u0531-\\u0556\\u0559\\u0560-\\u0588\\u05D0-\\u05EA\\u05EF-\\u05F2\\u0620-\\u064A\\u0660-\\u0669\\u066E\\u066F\\u0671-\\u06D3\\u06D5\\u06E5\\u06E6\\u06EE-\\u06FC\\u06FF\\u0710\\u0712-\\u072F\\u074D-\\u07A5\\u07B1\\u07C0-\\u07EA\\u07F4\\u07F5\\u07FA\\u0800-\\u0815\\u081A\\u0824\\u0828\\u0840-\\u0858\\u0860-\\u086A\\u08A0-\\u08B4\\u08B6-\\u08C7\\u0904-\\u0939\\u093D\\u0950\\u0958-\\u0961\\u0966-\\u096F\\u0971-\\u0980\\u0985-\\u098C\\u098F\\u0990\\u0993-\\u09A8\\u09AA-\\u09B0\\u09B2\\u09B6-\\u09B9\\u09BD\\u09CE\\u09DC\\u09DD\\u09DF-\\u09E1\\u09E6-\\u09F1\\u09F4-\\u09F9\\u09FC\\u0A05-\\u0A0A\\u0A0F\\u0A10\\u0A13-\\u0A28\\u0A2A-\\u0A30\\u0A32\\u0A33\\u0A35\\u0A36\\u0A38\\u0A39\\u0A59-\\u0A5C\\u0A5E\\u0A66-\\u0A6F\\u0A72-\\u0A74\\u0A85-\\u0A8D\\u0A8F-\\u0A91\\u0A93-\\u0AA8\\u0AAA-\\u0AB0\\u0AB2\\u0AB3\\u0AB5-\\u0AB9\\u0ABD\\u0AD0\\u0AE0\\u0AE1\\u0AE6-\\u0AEF\\u0AF9\\u0B05-\\u0B0C\\u0B0F\\u0B10\\u0B13-\\u0B28\\u0B2A-\\u0B30\\u0B32\\u0B33\\u0B35-\\u0B39\\u0B3D\\u0B5C\\u0B5D\\u0B5F-\\u0B61\\u0B66-\\u0B6F\\u0B71-\\u0B77\\u0B83\\u0B85-\\u0B8A\\u0B8E-\\u0B90\\u0B92-\\u0B95\\u0B99\\u0B9A\\u0B9C\\u0B9E\\u0B9F\\u0BA3\\u0BA4\\u0BA8-\\u0BAA\\u0BAE-\\u0BB9\\u0BD0\\u0BE6-\\u0BF2\\u0C05-\\u0C0C\\u0C0E-\\u0C10\\u0C12-\\u0C28\\u0C2A-\\u0C39\\u0C3D\\u0C58-\\u0C5A\\u0C60\\u0C61\\u0C66-\\u0C6F\\u0C78-\\u0C7E\\u0C80\\u0C85-\\u0C8C\\u0C8E-\\u0C90\\u0C92-\\u0CA8\\u0CAA-\\u0CB3\\u0CB5-\\u0CB9\\u0CBD\\u0CDE\\u0CE0\\u0CE1\\u0CE6-\\u0CEF\\u0CF1\\u0CF2\\u0D04-\\u0D0C\\u0D0E-\\u0D10\\u0D12-\\u0D3A\\u0D3D\\u0D4E\\u0D54-\\u0D56\\u0D58-\\u0D61\\u0D66-\\u0D78\\u0D7A-\\u0D7F\\u0D85-\\u0D96\\u0D9A-\\u0DB1\\u0DB3-\\u0DBB\\u0DBD\\u0DC0-\\u0DC6\\u0DE6-\\u0DEF\\u0E01-\\u0E30\\u0E32\\u0E33\\u0E40-\\u0E46\\u0E50-\\u0E59\\u0E81\\u0E82\\u0E84\\u0E86-\\u0E8A\\u0E8C-\\u0EA3\\u0EA5\\u0EA7-\\u0EB0\\u0EB2\\u0EB3\\u0EBD\\u0EC0-\\u0EC4\\u0EC6\\u0ED0-\\u0ED9\\u0EDC-\\u0EDF\\u0F00\\u0F20-\\u0F33\\u0F40-\\u0F47\\u0F49-\\u0F6C\\u0F88-\\u0F8C\\u1000-\\u102A\\u103F-\\u1049\\u1050-\\u1055\\u105A-\\u105D\\u1061\\u1065\\u1066\\u106E-\\u1070\\u1075-\\u1081\\u108E\\u1090-\\u1099\\u10A0-\\u10C5\\u10C7\\u10CD\\u10D0-\\u10FA\\u10FC-\\u1248\\u124A-\\u124D\\u1250-\\u1256\\u1258\\u125A-\\u125D\\u1260-\\u1288\\u128A-\\u128D\\u1290-\\u12B0\\u12B2-\\u12B5\\u12B8-\\u12BE\\u12C0\\u12C2-\\u12C5\\u12C8-\\u12D6\\u12D8-\\u1310\\u1312-\\u1315\\u1318-\\u135A\\u1369-\\u137C\\u1380-\\u138F\\u13A0-\\u13F5\\u13F8-\\u13FD\\u1401-\\u166C\\u166F-\\u167F\\u1681-\\u169A\\u16A0-\\u16EA\\u16EE-\\u16F8\\u1700-\\u170C\\u170E-\\u1711\\u1720-\\u1731\\u1740-\\u1751\\u1760-\\u176C\\u176E-\\u1770\\u1780-\\u17B3\\u17D7\\u17DC\\u17E0-\\u17E9\\u17F0-\\u17F9\\u1810-\\u1819\\u1820-\\u1878\\u1880-\\u1884\\u1887-\\u18A8\\u18AA\\u18B0-\\u18F5\\u1900-\\u191E\\u1946-\\u196D\\u1970-\\u1974\\u1980-\\u19AB\\u19B0-\\u19C9\\u19D0-\\u19DA\\u1A00-\\u1A16\\u1A20-\\u1A54\\u1A80-\\u1A89\\u1A90-\\u1A99\\u1AA7\\u1B05-\\u1B33\\u1B45-\\u1B4B\\u1B50-\\u1B59\\u1B83-\\u1BA0\\u1BAE-\\u1BE5\\u1C00-\\u1C23\\u1C40-\\u1C49\\u1C4D-\\u1C7D\\u1C80-\\u1C88\\u1C90-\\u1CBA\\u1CBD-\\u1CBF\\u1CE9-\\u1CEC\\u1CEE-\\u1CF3\\u1CF5\\u1CF6\\u1CFA\\u1D00-\\u1DBF\\u1E00-\\u1F15\\u1F18-\\u1F1D\\u1F20-\\u1F45\\u1F48-\\u1F4D\\u1F50-\\u1F57\\u1F59\\u1F5B\\u1F5D\\u1F5F-\\u1F7D\\u1F80-\\u1FB4\\u1FB6-\\u1FBC\\u1FBE\\u1FC2-\\u1FC4\\u1FC6-\\u1FCC\\u1FD0-\\u1FD3\\u1FD6-\\u1FDB\\u1FE0-\\u1FEC\\u1FF2-\\u1FF4\\u1FF6-\\u1FFC\\u2070\\u2071\\u2074-\\u2079\\u207F-\\u2089\\u2090-\\u209C\\u2102\\u2107\\u210A-\\u2113\\u2115\\u2119-\\u211D\\u2124\\u2126\\u2128\\u212A-\\u212D\\u212F-\\u2139\\u213C-\\u213F\\u2145-\\u2149\\u214E\\u2150-\\u2189\\u2460-\\u249B\\u24EA-\\u24FF\\u2776-\\u2793\\u2C00-\\u2C2E\\u2C30-\\u2C5E\\u2C60-\\u2CE4\\u2CEB-\\u2CEE\\u2CF2\\u2CF3\\u2CFD\\u2D00-\\u2D25\\u2D27\\u2D2D\\u2D30-\\u2D67\\u2D6F\\u2D80-\\u2D96\\u2DA0-\\u2DA6\\u2DA8-\\u2DAE\\u2DB0-\\u2DB6\\u2DB8-\\u2DBE\\u2DC0-\\u2DC6\\u2DC8-\\u2DCE\\u2DD0-\\u2DD6\\u2DD8-\\u2DDE\\u2E2F\\u3005-\\u3007\\u3021-\\u3029\\u3031-\\u3035\\u3038-\\u303C\\u3041-\\u3096\\u309D-\\u309F\\u30A1-\\u30FA\\u30FC-\\u30FF\\u3105-\\u312F\\u3131-\\u318E\\u3192-\\u3195\\u31A0-\\u31BF\\u31F0-\\u31FF\\u3220-\\u3229\\u3248-\\u324F\\u3251-\\u325F\\u3280-\\u3289\\u32B1-\\u32BF\\u3400-\\u4DBF\\u4E00-\\u9FFC\\uA000-\\uA48C\\uA4D0-\\uA4FD\\uA500-\\uA60C\\uA610-\\uA62B\\uA640-\\uA66E\\uA67F-\\uA69D\\uA6A0-\\uA6EF\\uA717-\\uA71F\\uA722-\\uA788\\uA78B-\\uA7BF\\uA7C2-\\uA7CA\\uA7F5-\\uA801\\uA803-\\uA805\\uA807-\\uA80A\\uA80C-\\uA822\\uA830-\\uA835\\uA840-\\uA873\\uA882-\\uA8B3\\uA8D0-\\uA8D9\\uA8F2-\\uA8F7\\uA8FB\\uA8FD\\uA8FE\\uA900-\\uA925\\uA930-\\uA946\\uA960-\\uA97C\\uA984-\\uA9B2\\uA9CF-\\uA9D9\\uA9E0-\\uA9E4\\uA9E6-\\uA9FE\\uAA00-\\uAA28\\uAA40-\\uAA42\\uAA44-\\uAA4B\\uAA50-\\uAA59\\uAA60-\\uAA76\\uAA7A\\uAA7E-\\uAAAF\\uAAB1\\uAAB5\\uAAB6\\uAAB9-\\uAABD\\uAAC0\\uAAC2\\uAADB-\\uAADD\\uAAE0-\\uAAEA\\uAAF2-\\uAAF4\\uAB01-\\uAB06\\uAB09-\\uAB0E\\uAB11-\\uAB16\\uAB20-\\uAB26\\uAB28-\\uAB2E\\uAB30-\\uAB5A\\uAB5C-\\uAB69\\uAB70-\\uABE2\\uABF0-\\uABF9\\uAC00-\\uD7A3\\uD7B0-\\uD7C6\\uD7CB-\\uD7FB\\uF900-\\uFA6D\\uFA70-\\uFAD9\\uFB00-\\uFB06\\uFB13-\\uFB17\\uFB1D\\uFB1F-\\uFB28\\uFB2A-\\uFB36\\uFB38-\\uFB3C\\uFB3E\\uFB40\\uFB41\\uFB43\\uFB44\\uFB46-\\uFBB1\\uFBD3-\\uFD3D\\uFD50-\\uFD8F\\uFD92-\\uFDC7\\uFDF0-\\uFDFB\\uFE70-\\uFE74\\uFE76-\\uFEFC\\uFF10-\\uFF19\\uFF21-\\uFF3A\\uFF41-\\uFF5A\\uFF66-\\uFFBE\\uFFC2-\\uFFC7\\uFFCA-\\uFFCF\\uFFD2-\\uFFD7\\uFFDA-\\uFFDC]|\\uD800[\\uDC00-\\uDC0B\\uDC0D-\\uDC26\\uDC28-\\uDC3A\\uDC3C\\uDC3D\\uDC3F-\\uDC4D\\uDC50-\\uDC5D\\uDC80-\\uDCFA\\uDD07-\\uDD33\\uDD40-\\uDD78\\uDD8A\\uDD8B\\uDE80-\\uDE9C\\uDEA0-\\uDED0\\uDEE1-\\uDEFB\\uDF00-\\uDF23\\uDF2D-\\uDF4A\\uDF50-\\uDF75\\uDF80-\\uDF9D\\uDFA0-\\uDFC3\\uDFC8-\\uDFCF\\uDFD1-\\uDFD5]|\\uD801[\\uDC00-\\uDC9D\\uDCA0-\\uDCA9\\uDCB0-\\uDCD3\\uDCD8-\\uDCFB\\uDD00-\\uDD27\\uDD30-\\uDD63\\uDE00-\\uDF36\\uDF40-\\uDF55\\uDF60-\\uDF67]|\\uD802[\\uDC00-\\uDC05\\uDC08\\uDC0A-\\uDC35\\uDC37\\uDC38\\uDC3C\\uDC3F-\\uDC55\\uDC58-\\uDC76\\uDC79-\\uDC9E\\uDCA7-\\uDCAF\\uDCE0-\\uDCF2\\uDCF4\\uDCF5\\uDCFB-\\uDD1B\\uDD20-\\uDD39\\uDD80-\\uDDB7\\uDDBC-\\uDDCF\\uDDD2-\\uDE00\\uDE10-\\uDE13\\uDE15-\\uDE17\\uDE19-\\uDE35\\uDE40-\\uDE48\\uDE60-\\uDE7E\\uDE80-\\uDE9F\\uDEC0-\\uDEC7\\uDEC9-\\uDEE4\\uDEEB-\\uDEEF\\uDF00-\\uDF35\\uDF40-\\uDF55\\uDF58-\\uDF72\\uDF78-\\uDF91\\uDFA9-\\uDFAF]|\\uD803[\\uDC00-\\uDC48\\uDC80-\\uDCB2\\uDCC0-\\uDCF2\\uDCFA-\\uDD23\\uDD30-\\uDD39\\uDE60-\\uDE7E\\uDE80-\\uDEA9\\uDEB0\\uDEB1\\uDF00-\\uDF27\\uDF30-\\uDF45\\uDF51-\\uDF54\\uDFB0-\\uDFCB\\uDFE0-\\uDFF6]|\\uD804[\\uDC03-\\uDC37\\uDC52-\\uDC6F\\uDC83-\\uDCAF\\uDCD0-\\uDCE8\\uDCF0-\\uDCF9\\uDD03-\\uDD26\\uDD36-\\uDD3F\\uDD44\\uDD47\\uDD50-\\uDD72\\uDD76\\uDD83-\\uDDB2\\uDDC1-\\uDDC4\\uDDD0-\\uDDDA\\uDDDC\\uDDE1-\\uDDF4\\uDE00-\\uDE11\\uDE13-\\uDE2B\\uDE80-\\uDE86\\uDE88\\uDE8A-\\uDE8D\\uDE8F-\\uDE9D\\uDE9F-\\uDEA8\\uDEB0-\\uDEDE\\uDEF0-\\uDEF9\\uDF05-\\uDF0C\\uDF0F\\uDF10\\uDF13-\\uDF28\\uDF2A-\\uDF30\\uDF32\\uDF33\\uDF35-\\uDF39\\uDF3D\\uDF50\\uDF5D-\\uDF61]|\\uD805[\\uDC00-\\uDC34\\uDC47-\\uDC4A\\uDC50-\\uDC59\\uDC5F-\\uDC61\\uDC80-\\uDCAF\\uDCC4\\uDCC5\\uDCC7\\uDCD0-\\uDCD9\\uDD80-\\uDDAE\\uDDD8-\\uDDDB\\uDE00-\\uDE2F\\uDE44\\uDE50-\\uDE59\\uDE80-\\uDEAA\\uDEB8\\uDEC0-\\uDEC9\\uDF00-\\uDF1A\\uDF30-\\uDF3B]|\\uD806[\\uDC00-\\uDC2B\\uDCA0-\\uDCF2\\uDCFF-\\uDD06\\uDD09\\uDD0C-\\uDD13\\uDD15\\uDD16\\uDD18-\\uDD2F\\uDD3F\\uDD41\\uDD50-\\uDD59\\uDDA0-\\uDDA7\\uDDAA-\\uDDD0\\uDDE1\\uDDE3\\uDE00\\uDE0B-\\uDE32\\uDE3A\\uDE50\\uDE5C-\\uDE89\\uDE9D\\uDEC0-\\uDEF8]|\\uD807[\\uDC00-\\uDC08\\uDC0A-\\uDC2E\\uDC40\\uDC50-\\uDC6C\\uDC72-\\uDC8F\\uDD00-\\uDD06\\uDD08\\uDD09\\uDD0B-\\uDD30\\uDD46\\uDD50-\\uDD59\\uDD60-\\uDD65\\uDD67\\uDD68\\uDD6A-\\uDD89\\uDD98\\uDDA0-\\uDDA9\\uDEE0-\\uDEF2\\uDFB0\\uDFC0-\\uDFD4]|\\uD808[\\uDC00-\\uDF99]|\\uD809[\\uDC00-\\uDC6E\\uDC80-\\uDD43]|[\\uD80C\\uD81C-\\uD820\\uD822\\uD840-\\uD868\\uD86A-\\uD86C\\uD86F-\\uD872\\uD874-\\uD879\\uD880-\\uD883][\\uDC00-\\uDFFF]|\\uD80D[\\uDC00-\\uDC2E]|\\uD811[\\uDC00-\\uDE46]|\\uD81A[\\uDC00-\\uDE38\\uDE40-\\uDE5E\\uDE60-\\uDE69\\uDED0-\\uDEED\\uDF00-\\uDF2F\\uDF40-\\uDF43\\uDF50-\\uDF59\\uDF5B-\\uDF61\\uDF63-\\uDF77\\uDF7D-\\uDF8F]|\\uD81B[\\uDE40-\\uDE96\\uDF00-\\uDF4A\\uDF50\\uDF93-\\uDF9F\\uDFE0\\uDFE1\\uDFE3]|\\uD821[\\uDC00-\\uDFF7]|\\uD823[\\uDC00-\\uDCD5\\uDD00-\\uDD08]|\\uD82C[\\uDC00-\\uDD1E\\uDD50-\\uDD52\\uDD64-\\uDD67\\uDD70-\\uDEFB]|\\uD82F[\\uDC00-\\uDC6A\\uDC70-\\uDC7C\\uDC80-\\uDC88\\uDC90-\\uDC99]|\\uD834[\\uDEE0-\\uDEF3\\uDF60-\\uDF78]|\\uD835[\\uDC00-\\uDC54\\uDC56-\\uDC9C\\uDC9E\\uDC9F\\uDCA2\\uDCA5\\uDCA6\\uDCA9-\\uDCAC\\uDCAE-\\uDCB9\\uDCBB\\uDCBD-\\uDCC3\\uDCC5-\\uDD05\\uDD07-\\uDD0A\\uDD0D-\\uDD14\\uDD16-\\uDD1C\\uDD1E-\\uDD39\\uDD3B-\\uDD3E\\uDD40-\\uDD44\\uDD46\\uDD4A-\\uDD50\\uDD52-\\uDEA5\\uDEA8-\\uDEC0\\uDEC2-\\uDEDA\\uDEDC-\\uDEFA\\uDEFC-\\uDF14\\uDF16-\\uDF34\\uDF36-\\uDF4E\\uDF50-\\uDF6E\\uDF70-\\uDF88\\uDF8A-\\uDFA8\\uDFAA-\\uDFC2\\uDFC4-\\uDFCB\\uDFCE-\\uDFFF]|\\uD838[\\uDD00-\\uDD2C\\uDD37-\\uDD3D\\uDD40-\\uDD49\\uDD4E\\uDEC0-\\uDEEB\\uDEF0-\\uDEF9]|\\uD83A[\\uDC00-\\uDCC4\\uDCC7-\\uDCCF\\uDD00-\\uDD43\\uDD4B\\uDD50-\\uDD59]|\\uD83B[\\uDC71-\\uDCAB\\uDCAD-\\uDCAF\\uDCB1-\\uDCB4\\uDD01-\\uDD2D\\uDD2F-\\uDD3D\\uDE00-\\uDE03\\uDE05-\\uDE1F\\uDE21\\uDE22\\uDE24\\uDE27\\uDE29-\\uDE32\\uDE34-\\uDE37\\uDE39\\uDE3B\\uDE42\\uDE47\\uDE49\\uDE4B\\uDE4D-\\uDE4F\\uDE51\\uDE52\\uDE54\\uDE57\\uDE59\\uDE5B\\uDE5D\\uDE5F\\uDE61\\uDE62\\uDE64\\uDE67-\\uDE6A\\uDE6C-\\uDE72\\uDE74-\\uDE77\\uDE79-\\uDE7C\\uDE7E\\uDE80-\\uDE89\\uDE8B-\\uDE9B\\uDEA1-\\uDEA3\\uDEA5-\\uDEA9\\uDEAB-\\uDEBB]|\\uD83C[\\uDD00-\\uDD0C]|\\uD83E[\\uDFF0-\\uDFF9]|\\uD869[\\uDC00-\\uDEDD\\uDF00-\\uDFFF]|\\uD86D[\\uDC00-\\uDF34\\uDF40-\\uDFFF]|\\uD86E[\\uDC00-\\uDC1D\\uDC20-\\uDFFF]|\\uD873[\\uDC00-\\uDEA1\\uDEB0-\\uDFFF]|\\uD87A[\\uDC00-\\uDFE0]|\\uD87E[\\uDC00-\\uDE1D]|\\uD884[\\uDC00-\\uDF4A])/)) return;\n      var nextChar = match[1] || match[2] || '';\n\n      if (!nextChar || nextChar && (prevChar === '' || this.rules.inline.punctuation.exec(prevChar))) {\n        var lLength = match[0].length - 1;\n        var rDelim,\n            rLength,\n            delimTotal = lLength,\n            midDelimTotal = 0;\n        var endReg = match[0][0] === '*' ? this.rules.inline.emStrong.rDelimAst : this.rules.inline.emStrong.rDelimUnd;\n        endReg.lastIndex = 0; // Clip maskedSrc to same section of string as src (move to lexer?)\n\n        maskedSrc = maskedSrc.slice(-1 * src.length + lLength);\n\n        while ((match = endReg.exec(maskedSrc)) != null) {\n          rDelim = match[1] || match[2] || match[3] || match[4] || match[5] || match[6];\n          if (!rDelim) continue; // skip single * in __abc*abc__\n\n          rLength = rDelim.length;\n\n          if (match[3] || match[4]) {\n            // found another Left Delim\n            delimTotal += rLength;\n            continue;\n          } else if (match[5] || match[6]) {\n            // either Left or Right Delim\n            if (lLength % 3 && !((lLength + rLength) % 3)) {\n              midDelimTotal += rLength;\n              continue; // CommonMark Emphasis Rules 9-10\n            }\n          }\n\n          delimTotal -= rLength;\n          if (delimTotal > 0) continue; // Haven't found enough closing delimiters\n          // Remove extra characters. *a*** -> *a*\n\n          rLength = Math.min(rLength, rLength + delimTotal + midDelimTotal); // Create `em` if smallest delimiter has odd char count. *a***\n\n          if (Math.min(lLength, rLength) % 2) {\n            return {\n              type: 'em',\n              raw: src.slice(0, lLength + match.index + rLength + 1),\n              text: src.slice(1, lLength + match.index + rLength)\n            };\n          } // Create 'strong' if smallest delimiter has even char count. **a***\n\n\n          return {\n            type: 'strong',\n            raw: src.slice(0, lLength + match.index + rLength + 1),\n            text: src.slice(2, lLength + match.index + rLength - 1)\n          };\n        }\n      }\n    };\n\n    _proto.codespan = function codespan(src) {\n      var cap = this.rules.inline.code.exec(src);\n\n      if (cap) {\n        var text = cap[2].replace(/\\n/g, ' ');\n        var hasNonSpaceChars = /[^ ]/.test(text);\n        var hasSpaceCharsOnBothEnds = /^ /.test(text) && / $/.test(text);\n\n        if (hasNonSpaceChars && hasSpaceCharsOnBothEnds) {\n          text = text.substring(1, text.length - 1);\n        }\n\n        text = _escape(text, true);\n        return {\n          type: 'codespan',\n          raw: cap[0],\n          text: text\n        };\n      }\n    };\n\n    _proto.br = function br(src) {\n      var cap = this.rules.inline.br.exec(src);\n\n      if (cap) {\n        return {\n          type: 'br',\n          raw: cap[0]\n        };\n      }\n    };\n\n    _proto.del = function del(src) {\n      var cap = this.rules.inline.del.exec(src);\n\n      if (cap) {\n        return {\n          type: 'del',\n          raw: cap[0],\n          text: cap[2]\n        };\n      }\n    };\n\n    _proto.autolink = function autolink(src, mangle) {\n      var cap = this.rules.inline.autolink.exec(src);\n\n      if (cap) {\n        var text, href;\n\n        if (cap[2] === '@') {\n          text = _escape(this.options.mangle ? mangle(cap[1]) : cap[1]);\n          href = 'mailto:' + text;\n        } else {\n          text = _escape(cap[1]);\n          href = text;\n        }\n\n        return {\n          type: 'link',\n          raw: cap[0],\n          text: text,\n          href: href,\n          tokens: [{\n            type: 'text',\n            raw: text,\n            text: text\n          }]\n        };\n      }\n    };\n\n    _proto.url = function url(src, mangle) {\n      var cap;\n\n      if (cap = this.rules.inline.url.exec(src)) {\n        var text, href;\n\n        if (cap[2] === '@') {\n          text = _escape(this.options.mangle ? mangle(cap[0]) : cap[0]);\n          href = 'mailto:' + text;\n        } else {\n          // do extended autolink path validation\n          var prevCapZero;\n\n          do {\n            prevCapZero = cap[0];\n            cap[0] = this.rules.inline._backpedal.exec(cap[0])[0];\n          } while (prevCapZero !== cap[0]);\n\n          text = _escape(cap[0]);\n\n          if (cap[1] === 'www.') {\n            href = 'http://' + text;\n          } else {\n            href = text;\n          }\n        }\n\n        return {\n          type: 'link',\n          raw: cap[0],\n          text: text,\n          href: href,\n          tokens: [{\n            type: 'text',\n            raw: text,\n            text: text\n          }]\n        };\n      }\n    };\n\n    _proto.inlineText = function inlineText(src, inRawBlock, smartypants) {\n      var cap = this.rules.inline.text.exec(src);\n\n      if (cap) {\n        var text;\n\n        if (inRawBlock) {\n          text = this.options.sanitize ? this.options.sanitizer ? this.options.sanitizer(cap[0]) : _escape(cap[0]) : cap[0];\n        } else {\n          text = _escape(this.options.smartypants ? smartypants(cap[0]) : cap[0]);\n        }\n\n        return {\n          type: 'text',\n          raw: cap[0],\n          text: text\n        };\n      }\n    };\n\n    return Tokenizer;\n  }();\n\n  var noopTest = helpers.noopTest,\n      edit = helpers.edit,\n      merge$1 = helpers.merge;\n  /**\n   * Block-Level Grammar\n   */\n\n  var block$1 = {\n    newline: /^(?: *(?:\\n|$))+/,\n    code: /^( {4}[^\\n]+(?:\\n(?: *(?:\\n|$))*)?)+/,\n    fences: /^ {0,3}(`{3,}(?=[^`\\n]*\\n)|~{3,})([^\\n]*)\\n(?:|([\\s\\S]*?)\\n)(?: {0,3}\\1[~`]* *(?:\\n+|$)|$)/,\n    hr: /^ {0,3}((?:- *){3,}|(?:_ *){3,}|(?:\\* *){3,})(?:\\n+|$)/,\n    heading: /^ {0,3}(#{1,6})(?=\\s|$)(.*)(?:\\n+|$)/,\n    blockquote: /^( {0,3}> ?(paragraph|[^\\n]*)(?:\\n|$))+/,\n    list: /^( {0,3})(bull) [\\s\\S]+?(?:hr|def|\\n{2,}(?! )(?! {0,3}bull )\\n*|\\s*$)/,\n    html: '^ {0,3}(?:' // optional indentation\n    + '<(script|pre|style)[\\\\s>][\\\\s\\\\S]*?(?:</\\\\1>[^\\\\n]*\\\\n+|$)' // (1)\n    + '|comment[^\\\\n]*(\\\\n+|$)' // (2)\n    + '|<\\\\?[\\\\s\\\\S]*?(?:\\\\?>\\\\n*|$)' // (3)\n    + '|<![A-Z][\\\\s\\\\S]*?(?:>\\\\n*|$)' // (4)\n    + '|<!\\\\[CDATA\\\\[[\\\\s\\\\S]*?(?:\\\\]\\\\]>\\\\n*|$)' // (5)\n    + '|</?(tag)(?: +|\\\\n|/?>)[\\\\s\\\\S]*?(?:(?:\\\\n *)+\\\\n|$)' // (6)\n    + '|<(?!script|pre|style)([a-z][\\\\w-]*)(?:attribute)*? */?>(?=[ \\\\t]*(?:\\\\n|$))[\\\\s\\\\S]*?(?:(?:\\\\n *)+\\\\n|$)' // (7) open tag\n    + '|</(?!script|pre|style)[a-z][\\\\w-]*\\\\s*>(?=[ \\\\t]*(?:\\\\n|$))[\\\\s\\\\S]*?(?:(?:\\\\n *)+\\\\n|$)' // (7) closing tag\n    + ')',\n    def: /^ {0,3}\\[(label)\\]: *\\n? *<?([^\\s>]+)>?(?:(?: +\\n? *| *\\n *)(title))? *(?:\\n+|$)/,\n    nptable: noopTest,\n    table: noopTest,\n    lheading: /^([^\\n]+)\\n {0,3}(=+|-+) *(?:\\n+|$)/,\n    // regex template, placeholders will be replaced according to different paragraph\n    // interruption rules of commonmark and the original markdown spec:\n    _paragraph: /^([^\\n]+(?:\\n(?!hr|heading|lheading|blockquote|fences|list|html| +\\n)[^\\n]+)*)/,\n    text: /^[^\\n]+/\n  };\n  block$1._label = /(?!\\s*\\])(?:\\\\[\\[\\]]|[^\\[\\]])+/;\n  block$1._title = /(?:\"(?:\\\\\"?|[^\"\\\\])*\"|'[^'\\n]*(?:\\n[^'\\n]+)*\\n?'|\\([^()]*\\))/;\n  block$1.def = edit(block$1.def).replace('label', block$1._label).replace('title', block$1._title).getRegex();\n  block$1.bullet = /(?:[*+-]|\\d{1,9}[.)])/;\n  block$1.item = /^( *)(bull) ?[^\\n]*(?:\\n(?! *bull ?)[^\\n]*)*/;\n  block$1.item = edit(block$1.item, 'gm').replace(/bull/g, block$1.bullet).getRegex();\n  block$1.listItemStart = edit(/^( *)(bull) */).replace('bull', block$1.bullet).getRegex();\n  block$1.list = edit(block$1.list).replace(/bull/g, block$1.bullet).replace('hr', '\\\\n+(?=\\\\1?(?:(?:- *){3,}|(?:_ *){3,}|(?:\\\\* *){3,})(?:\\\\n+|$))').replace('def', '\\\\n+(?=' + block$1.def.source + ')').getRegex();\n  block$1._tag = 'address|article|aside|base|basefont|blockquote|body|caption' + '|center|col|colgroup|dd|details|dialog|dir|div|dl|dt|fieldset|figcaption' + '|figure|footer|form|frame|frameset|h[1-6]|head|header|hr|html|iframe' + '|legend|li|link|main|menu|menuitem|meta|nav|noframes|ol|optgroup|option' + '|p|param|section|source|summary|table|tbody|td|tfoot|th|thead|title|tr' + '|track|ul';\n  block$1._comment = /<!--(?!-?>)[\\s\\S]*?(?:-->|$)/;\n  block$1.html = edit(block$1.html, 'i').replace('comment', block$1._comment).replace('tag', block$1._tag).replace('attribute', / +[a-zA-Z:_][\\w.:-]*(?: *= *\"[^\"\\n]*\"| *= *'[^'\\n]*'| *= *[^\\s\"'=<>`]+)?/).getRegex();\n  block$1.paragraph = edit(block$1._paragraph).replace('hr', block$1.hr).replace('heading', ' {0,3}#{1,6} ').replace('|lheading', '') // setex headings don't interrupt commonmark paragraphs\n  .replace('blockquote', ' {0,3}>').replace('fences', ' {0,3}(?:`{3,}(?=[^`\\\\n]*\\\\n)|~{3,})[^\\\\n]*\\\\n').replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt\n  .replace('html', '</?(?:tag)(?: +|\\\\n|/?>)|<(?:script|pre|style|!--)').replace('tag', block$1._tag) // pars can be interrupted by type (6) html blocks\n  .getRegex();\n  block$1.blockquote = edit(block$1.blockquote).replace('paragraph', block$1.paragraph).getRegex();\n  /**\n   * Normal Block Grammar\n   */\n\n  block$1.normal = merge$1({}, block$1);\n  /**\n   * GFM Block Grammar\n   */\n\n  block$1.gfm = merge$1({}, block$1.normal, {\n    nptable: '^ *([^|\\\\n ].*\\\\|.*)\\\\n' // Header\n    + ' {0,3}([-:]+ *\\\\|[-| :]*)' // Align\n    + '(?:\\\\n((?:(?!\\\\n|hr|heading|blockquote|code|fences|list|html).*(?:\\\\n|$))*)\\\\n*|$)',\n    // Cells\n    table: '^ *\\\\|(.+)\\\\n' // Header\n    + ' {0,3}\\\\|?( *[-:]+[-| :]*)' // Align\n    + '(?:\\\\n *((?:(?!\\\\n|hr|heading|blockquote|code|fences|list|html).*(?:\\\\n|$))*)\\\\n*|$)' // Cells\n\n  });\n  block$1.gfm.nptable = edit(block$1.gfm.nptable).replace('hr', block$1.hr).replace('heading', ' {0,3}#{1,6} ').replace('blockquote', ' {0,3}>').replace('code', ' {4}[^\\\\n]').replace('fences', ' {0,3}(?:`{3,}(?=[^`\\\\n]*\\\\n)|~{3,})[^\\\\n]*\\\\n').replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt\n  .replace('html', '</?(?:tag)(?: +|\\\\n|/?>)|<(?:script|pre|style|!--)').replace('tag', block$1._tag) // tables can be interrupted by type (6) html blocks\n  .getRegex();\n  block$1.gfm.table = edit(block$1.gfm.table).replace('hr', block$1.hr).replace('heading', ' {0,3}#{1,6} ').replace('blockquote', ' {0,3}>').replace('code', ' {4}[^\\\\n]').replace('fences', ' {0,3}(?:`{3,}(?=[^`\\\\n]*\\\\n)|~{3,})[^\\\\n]*\\\\n').replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt\n  .replace('html', '</?(?:tag)(?: +|\\\\n|/?>)|<(?:script|pre|style|!--)').replace('tag', block$1._tag) // tables can be interrupted by type (6) html blocks\n  .getRegex();\n  /**\n   * Pedantic grammar (original John Gruber's loose markdown specification)\n   */\n\n  block$1.pedantic = merge$1({}, block$1.normal, {\n    html: edit('^ *(?:comment *(?:\\\\n|\\\\s*$)' + '|<(tag)[\\\\s\\\\S]+?</\\\\1> *(?:\\\\n{2,}|\\\\s*$)' // closed tag\n    + '|<tag(?:\"[^\"]*\"|\\'[^\\']*\\'|\\\\s[^\\'\"/>\\\\s]*)*?/?> *(?:\\\\n{2,}|\\\\s*$))').replace('comment', block$1._comment).replace(/tag/g, '(?!(?:' + 'a|em|strong|small|s|cite|q|dfn|abbr|data|time|code|var|samp|kbd|sub' + '|sup|i|b|u|mark|ruby|rt|rp|bdi|bdo|span|br|wbr|ins|del|img)' + '\\\\b)\\\\w+(?!:|[^\\\\w\\\\s@]*@)\\\\b').getRegex(),\n    def: /^ *\\[([^\\]]+)\\]: *<?([^\\s>]+)>?(?: +([\"(][^\\n]+[\")]))? *(?:\\n+|$)/,\n    heading: /^(#{1,6})(.*)(?:\\n+|$)/,\n    fences: noopTest,\n    // fences not supported\n    paragraph: edit(block$1.normal._paragraph).replace('hr', block$1.hr).replace('heading', ' *#{1,6} *[^\\n]').replace('lheading', block$1.lheading).replace('blockquote', ' {0,3}>').replace('|fences', '').replace('|list', '').replace('|html', '').getRegex()\n  });\n  /**\n   * Inline-Level Grammar\n   */\n\n  var inline$1 = {\n    escape: /^\\\\([!\"#$%&'()*+,\\-./:;<=>?@\\[\\]\\\\^_`{|}~])/,\n    autolink: /^<(scheme:[^\\s\\x00-\\x1f<>]*|email)>/,\n    url: noopTest,\n    tag: '^comment' + '|^</[a-zA-Z][\\\\w:-]*\\\\s*>' // self-closing tag\n    + '|^<[a-zA-Z][\\\\w-]*(?:attribute)*?\\\\s*/?>' // open tag\n    + '|^<\\\\?[\\\\s\\\\S]*?\\\\?>' // processing instruction, e.g. <?php ?>\n    + '|^<![a-zA-Z]+\\\\s[\\\\s\\\\S]*?>' // declaration, e.g. <!DOCTYPE html>\n    + '|^<!\\\\[CDATA\\\\[[\\\\s\\\\S]*?\\\\]\\\\]>',\n    // CDATA section\n    link: /^!?\\[(label)\\]\\(\\s*(href)(?:\\s+(title))?\\s*\\)/,\n    reflink: /^!?\\[(label)\\]\\[(?!\\s*\\])((?:\\\\[\\[\\]]?|[^\\[\\]\\\\])+)\\]/,\n    nolink: /^!?\\[(?!\\s*\\])((?:\\[[^\\[\\]]*\\]|\\\\[\\[\\]]|[^\\[\\]])*)\\](?:\\[\\])?/,\n    reflinkSearch: 'reflink|nolink(?!\\\\()',\n    emStrong: {\n      lDelim: /^(?:\\*+(?:([punct_])|[^\\s*]))|^_+(?:([punct*])|([^\\s_]))/,\n      //        (1) and (2) can only be a Right Delimiter. (3) and (4) can only be Left.  (5) and (6) can be either Left or Right.\n      //        () Skip other delimiter (1) #***                   (2) a***#, a***                   (3) #***a, ***a                 (4) ***#              (5) #***#                 (6) a***a\n      rDelimAst: /\\_\\_[^_*]*?\\*[^_*]*?\\_\\_|[punct_](\\*+)(?=[\\s]|$)|[^punct*_\\s](\\*+)(?=[punct_\\s]|$)|[punct_\\s](\\*+)(?=[^punct*_\\s])|[\\s](\\*+)(?=[punct_])|[punct_](\\*+)(?=[punct_])|[^punct*_\\s](\\*+)(?=[^punct*_\\s])/,\n      rDelimUnd: /\\*\\*[^_*]*?\\_[^_*]*?\\*\\*|[punct*](\\_+)(?=[\\s]|$)|[^punct*_\\s](\\_+)(?=[punct*\\s]|$)|[punct*\\s](\\_+)(?=[^punct*_\\s])|[\\s](\\_+)(?=[punct*])|[punct*](\\_+)(?=[punct*])/ // ^- Not allowed for _\n\n    },\n    code: /^(`+)([^`]|[^`][\\s\\S]*?[^`])\\1(?!`)/,\n    br: /^( {2,}|\\\\)\\n(?!\\s*$)/,\n    del: noopTest,\n    text: /^(`+|[^`])(?:(?= {2,}\\n)|[\\s\\S]*?(?:(?=[\\\\<!\\[`*_]|\\b_|$)|[^ ](?= {2,}\\n)))/,\n    punctuation: /^([\\spunctuation])/\n  }; // list of punctuation marks from CommonMark spec\n  // without * and _ to handle the different emphasis markers * and _\n\n  inline$1._punctuation = '!\"#$%&\\'()+\\\\-.,/:;<=>?@\\\\[\\\\]`^{|}~';\n  inline$1.punctuation = edit(inline$1.punctuation).replace(/punctuation/g, inline$1._punctuation).getRegex(); // sequences em should skip over [title](link), `code`, <html>\n\n  inline$1.blockSkip = /\\[[^\\]]*?\\]\\([^\\)]*?\\)|`[^`]*?`|<[^>]*?>/g;\n  inline$1.escapedEmSt = /\\\\\\*|\\\\_/g;\n  inline$1._comment = edit(block$1._comment).replace('(?:-->|$)', '-->').getRegex();\n  inline$1.emStrong.lDelim = edit(inline$1.emStrong.lDelim).replace(/punct/g, inline$1._punctuation).getRegex();\n  inline$1.emStrong.rDelimAst = edit(inline$1.emStrong.rDelimAst, 'g').replace(/punct/g, inline$1._punctuation).getRegex();\n  inline$1.emStrong.rDelimUnd = edit(inline$1.emStrong.rDelimUnd, 'g').replace(/punct/g, inline$1._punctuation).getRegex();\n  inline$1._escapes = /\\\\([!\"#$%&'()*+,\\-./:;<=>?@\\[\\]\\\\^_`{|}~])/g;\n  inline$1._scheme = /[a-zA-Z][a-zA-Z0-9+.-]{1,31}/;\n  inline$1._email = /[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+(@)[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)+(?![-_])/;\n  inline$1.autolink = edit(inline$1.autolink).replace('scheme', inline$1._scheme).replace('email', inline$1._email).getRegex();\n  inline$1._attribute = /\\s+[a-zA-Z:_][\\w.:-]*(?:\\s*=\\s*\"[^\"]*\"|\\s*=\\s*'[^']*'|\\s*=\\s*[^\\s\"'=<>`]+)?/;\n  inline$1.tag = edit(inline$1.tag).replace('comment', inline$1._comment).replace('attribute', inline$1._attribute).getRegex();\n  inline$1._label = /(?:\\[(?:\\\\.|[^\\[\\]\\\\])*\\]|\\\\.|`[^`]*`|[^\\[\\]\\\\`])*?/;\n  inline$1._href = /<(?:\\\\.|[^\\n<>\\\\])+>|[^\\s\\x00-\\x1f]*/;\n  inline$1._title = /\"(?:\\\\\"?|[^\"\\\\])*\"|'(?:\\\\'?|[^'\\\\])*'|\\((?:\\\\\\)?|[^)\\\\])*\\)/;\n  inline$1.link = edit(inline$1.link).replace('label', inline$1._label).replace('href', inline$1._href).replace('title', inline$1._title).getRegex();\n  inline$1.reflink = edit(inline$1.reflink).replace('label', inline$1._label).getRegex();\n  inline$1.reflinkSearch = edit(inline$1.reflinkSearch, 'g').replace('reflink', inline$1.reflink).replace('nolink', inline$1.nolink).getRegex();\n  /**\n   * Normal Inline Grammar\n   */\n\n  inline$1.normal = merge$1({}, inline$1);\n  /**\n   * Pedantic Inline Grammar\n   */\n\n  inline$1.pedantic = merge$1({}, inline$1.normal, {\n    strong: {\n      start: /^__|\\*\\*/,\n      middle: /^__(?=\\S)([\\s\\S]*?\\S)__(?!_)|^\\*\\*(?=\\S)([\\s\\S]*?\\S)\\*\\*(?!\\*)/,\n      endAst: /\\*\\*(?!\\*)/g,\n      endUnd: /__(?!_)/g\n    },\n    em: {\n      start: /^_|\\*/,\n      middle: /^()\\*(?=\\S)([\\s\\S]*?\\S)\\*(?!\\*)|^_(?=\\S)([\\s\\S]*?\\S)_(?!_)/,\n      endAst: /\\*(?!\\*)/g,\n      endUnd: /_(?!_)/g\n    },\n    link: edit(/^!?\\[(label)\\]\\((.*?)\\)/).replace('label', inline$1._label).getRegex(),\n    reflink: edit(/^!?\\[(label)\\]\\s*\\[([^\\]]*)\\]/).replace('label', inline$1._label).getRegex()\n  });\n  /**\n   * GFM Inline Grammar\n   */\n\n  inline$1.gfm = merge$1({}, inline$1.normal, {\n    escape: edit(inline$1.escape).replace('])', '~|])').getRegex(),\n    _extended_email: /[A-Za-z0-9._+-]+(@)[a-zA-Z0-9-_]+(?:\\.[a-zA-Z0-9-_]*[a-zA-Z0-9])+(?![-_])/,\n    url: /^((?:ftp|https?):\\/\\/|www\\.)(?:[a-zA-Z0-9\\-]+\\.?)+[^\\s<]*|^email/,\n    _backpedal: /(?:[^?!.,:;*_~()&]+|\\([^)]*\\)|&(?![a-zA-Z0-9]+;$)|[?!.,:;*_~)]+(?!$))+/,\n    del: /^(~~?)(?=[^\\s~])([\\s\\S]*?[^\\s~])\\1(?=[^~]|$)/,\n    text: /^([`~]+|[^`~])(?:(?= {2,}\\n)|(?=[a-zA-Z0-9.!#$%&'*+\\/=?_`{\\|}~-]+@)|[\\s\\S]*?(?:(?=[\\\\<!\\[`*~_]|\\b_|https?:\\/\\/|ftp:\\/\\/|www\\.|$)|[^ ](?= {2,}\\n)|[^a-zA-Z0-9.!#$%&'*+\\/=?_`{\\|}~-](?=[a-zA-Z0-9.!#$%&'*+\\/=?_`{\\|}~-]+@)))/\n  });\n  inline$1.gfm.url = edit(inline$1.gfm.url, 'i').replace('email', inline$1.gfm._extended_email).getRegex();\n  /**\n   * GFM + Line Breaks Inline Grammar\n   */\n\n  inline$1.breaks = merge$1({}, inline$1.gfm, {\n    br: edit(inline$1.br).replace('{2,}', '*').getRegex(),\n    text: edit(inline$1.gfm.text).replace('\\\\b_', '\\\\b_| {2,}\\\\n').replace(/\\{2,\\}/g, '*').getRegex()\n  });\n  var rules = {\n    block: block$1,\n    inline: inline$1\n  };\n\n  var Tokenizer$1 = Tokenizer_1;\n  var defaults$3 = defaults$5.exports.defaults;\n  var block = rules.block,\n      inline = rules.inline;\n  var repeatString = helpers.repeatString;\n  /**\n   * smartypants text replacement\n   */\n\n  function smartypants(text) {\n    return text // em-dashes\n    .replace(/---/g, \"\\u2014\") // en-dashes\n    .replace(/--/g, \"\\u2013\") // opening singles\n    .replace(/(^|[-\\u2014/(\\[{\"\\s])'/g, \"$1\\u2018\") // closing singles & apostrophes\n    .replace(/'/g, \"\\u2019\") // opening doubles\n    .replace(/(^|[-\\u2014/(\\[{\\u2018\\s])\"/g, \"$1\\u201C\") // closing doubles\n    .replace(/\"/g, \"\\u201D\") // ellipses\n    .replace(/\\.{3}/g, \"\\u2026\");\n  }\n  /**\n   * mangle email addresses\n   */\n\n\n  function mangle(text) {\n    var out = '',\n        i,\n        ch;\n    var l = text.length;\n\n    for (i = 0; i < l; i++) {\n      ch = text.charCodeAt(i);\n\n      if (Math.random() > 0.5) {\n        ch = 'x' + ch.toString(16);\n      }\n\n      out += '&#' + ch + ';';\n    }\n\n    return out;\n  }\n  /**\n   * Block Lexer\n   */\n\n\n  var Lexer_1 = /*#__PURE__*/function () {\n    function Lexer(options) {\n      this.tokens = [];\n      this.tokens.links = Object.create(null);\n      this.options = options || defaults$3;\n      this.options.tokenizer = this.options.tokenizer || new Tokenizer$1();\n      this.tokenizer = this.options.tokenizer;\n      this.tokenizer.options = this.options;\n      var rules = {\n        block: block.normal,\n        inline: inline.normal\n      };\n\n      if (this.options.pedantic) {\n        rules.block = block.pedantic;\n        rules.inline = inline.pedantic;\n      } else if (this.options.gfm) {\n        rules.block = block.gfm;\n\n        if (this.options.breaks) {\n          rules.inline = inline.breaks;\n        } else {\n          rules.inline = inline.gfm;\n        }\n      }\n\n      this.tokenizer.rules = rules;\n    }\n    /**\n     * Expose Rules\n     */\n\n\n    /**\n     * Static Lex Method\n     */\n    Lexer.lex = function lex(src, options) {\n      var lexer = new Lexer(options);\n      return lexer.lex(src);\n    }\n    /**\n     * Static Lex Inline Method\n     */\n    ;\n\n    Lexer.lexInline = function lexInline(src, options) {\n      var lexer = new Lexer(options);\n      return lexer.inlineTokens(src);\n    }\n    /**\n     * Preprocessing\n     */\n    ;\n\n    var _proto = Lexer.prototype;\n\n    _proto.lex = function lex(src) {\n      src = src.replace(/\\r\\n|\\r/g, '\\n').replace(/\\t/g, '    ');\n      this.blockTokens(src, this.tokens, true);\n      this.inline(this.tokens);\n      return this.tokens;\n    }\n    /**\n     * Lexing\n     */\n    ;\n\n    _proto.blockTokens = function blockTokens(src, tokens, top) {\n      if (tokens === void 0) {\n        tokens = [];\n      }\n\n      if (top === void 0) {\n        top = true;\n      }\n\n      if (this.options.pedantic) {\n        src = src.replace(/^ +$/gm, '');\n      }\n\n      var token, i, l, lastToken;\n\n      while (src) {\n        // newline\n        if (token = this.tokenizer.space(src)) {\n          src = src.substring(token.raw.length);\n\n          if (token.type) {\n            tokens.push(token);\n          }\n\n          continue;\n        } // code\n\n\n        if (token = this.tokenizer.code(src)) {\n          src = src.substring(token.raw.length);\n          lastToken = tokens[tokens.length - 1]; // An indented code block cannot interrupt a paragraph.\n\n          if (lastToken && lastToken.type === 'paragraph') {\n            lastToken.raw += '\\n' + token.raw;\n            lastToken.text += '\\n' + token.text;\n          } else {\n            tokens.push(token);\n          }\n\n          continue;\n        } // fences\n\n\n        if (token = this.tokenizer.fences(src)) {\n          src = src.substring(token.raw.length);\n          tokens.push(token);\n          continue;\n        } // heading\n\n\n        if (token = this.tokenizer.heading(src)) {\n          src = src.substring(token.raw.length);\n          tokens.push(token);\n          continue;\n        } // table no leading pipe (gfm)\n\n\n        if (token = this.tokenizer.nptable(src)) {\n          src = src.substring(token.raw.length);\n          tokens.push(token);\n          continue;\n        } // hr\n\n\n        if (token = this.tokenizer.hr(src)) {\n          src = src.substring(token.raw.length);\n          tokens.push(token);\n          continue;\n        } // blockquote\n\n\n        if (token = this.tokenizer.blockquote(src)) {\n          src = src.substring(token.raw.length);\n          token.tokens = this.blockTokens(token.text, [], top);\n          tokens.push(token);\n          continue;\n        } // list\n\n\n        if (token = this.tokenizer.list(src)) {\n          src = src.substring(token.raw.length);\n          l = token.items.length;\n\n          for (i = 0; i < l; i++) {\n            token.items[i].tokens = this.blockTokens(token.items[i].text, [], false);\n          }\n\n          tokens.push(token);\n          continue;\n        } // html\n\n\n        if (token = this.tokenizer.html(src)) {\n          src = src.substring(token.raw.length);\n          tokens.push(token);\n          continue;\n        } // def\n\n\n        if (top && (token = this.tokenizer.def(src))) {\n          src = src.substring(token.raw.length);\n\n          if (!this.tokens.links[token.tag]) {\n            this.tokens.links[token.tag] = {\n              href: token.href,\n              title: token.title\n            };\n          }\n\n          continue;\n        } // table (gfm)\n\n\n        if (token = this.tokenizer.table(src)) {\n          src = src.substring(token.raw.length);\n          tokens.push(token);\n          continue;\n        } // lheading\n\n\n        if (token = this.tokenizer.lheading(src)) {\n          src = src.substring(token.raw.length);\n          tokens.push(token);\n          continue;\n        } // top-level paragraph\n\n\n        if (top && (token = this.tokenizer.paragraph(src))) {\n          src = src.substring(token.raw.length);\n          tokens.push(token);\n          continue;\n        } // text\n\n\n        if (token = this.tokenizer.text(src)) {\n          src = src.substring(token.raw.length);\n          lastToken = tokens[tokens.length - 1];\n\n          if (lastToken && lastToken.type === 'text') {\n            lastToken.raw += '\\n' + token.raw;\n            lastToken.text += '\\n' + token.text;\n          } else {\n            tokens.push(token);\n          }\n\n          continue;\n        }\n\n        if (src) {\n          var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);\n\n          if (this.options.silent) {\n            console.error(errMsg);\n            break;\n          } else {\n            throw new Error(errMsg);\n          }\n        }\n      }\n\n      return tokens;\n    };\n\n    _proto.inline = function inline(tokens) {\n      var i, j, k, l2, row, token;\n      var l = tokens.length;\n\n      for (i = 0; i < l; i++) {\n        token = tokens[i];\n\n        switch (token.type) {\n          case 'paragraph':\n          case 'text':\n          case 'heading':\n            {\n              token.tokens = [];\n              this.inlineTokens(token.text, token.tokens);\n              break;\n            }\n\n          case 'table':\n            {\n              token.tokens = {\n                header: [],\n                cells: []\n              }; // header\n\n              l2 = token.header.length;\n\n              for (j = 0; j < l2; j++) {\n                token.tokens.header[j] = [];\n                this.inlineTokens(token.header[j], token.tokens.header[j]);\n              } // cells\n\n\n              l2 = token.cells.length;\n\n              for (j = 0; j < l2; j++) {\n                row = token.cells[j];\n                token.tokens.cells[j] = [];\n\n                for (k = 0; k < row.length; k++) {\n                  token.tokens.cells[j][k] = [];\n                  this.inlineTokens(row[k], token.tokens.cells[j][k]);\n                }\n              }\n\n              break;\n            }\n\n          case 'blockquote':\n            {\n              this.inline(token.tokens);\n              break;\n            }\n\n          case 'list':\n            {\n              l2 = token.items.length;\n\n              for (j = 0; j < l2; j++) {\n                this.inline(token.items[j].tokens);\n              }\n\n              break;\n            }\n        }\n      }\n\n      return tokens;\n    }\n    /**\n     * Lexing/Compiling\n     */\n    ;\n\n    _proto.inlineTokens = function inlineTokens(src, tokens, inLink, inRawBlock) {\n      if (tokens === void 0) {\n        tokens = [];\n      }\n\n      if (inLink === void 0) {\n        inLink = false;\n      }\n\n      if (inRawBlock === void 0) {\n        inRawBlock = false;\n      }\n\n      var token, lastToken; // String with links masked to avoid interference with em and strong\n\n      var maskedSrc = src;\n      var match;\n      var keepPrevChar, prevChar; // Mask out reflinks\n\n      if (this.tokens.links) {\n        var links = Object.keys(this.tokens.links);\n\n        if (links.length > 0) {\n          while ((match = this.tokenizer.rules.inline.reflinkSearch.exec(maskedSrc)) != null) {\n            if (links.includes(match[0].slice(match[0].lastIndexOf('[') + 1, -1))) {\n              maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.reflinkSearch.lastIndex);\n            }\n          }\n        }\n      } // Mask out other blocks\n\n\n      while ((match = this.tokenizer.rules.inline.blockSkip.exec(maskedSrc)) != null) {\n        maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.blockSkip.lastIndex);\n      } // Mask out escaped em & strong delimiters\n\n\n      while ((match = this.tokenizer.rules.inline.escapedEmSt.exec(maskedSrc)) != null) {\n        maskedSrc = maskedSrc.slice(0, match.index) + '++' + maskedSrc.slice(this.tokenizer.rules.inline.escapedEmSt.lastIndex);\n      }\n\n      while (src) {\n        if (!keepPrevChar) {\n          prevChar = '';\n        }\n\n        keepPrevChar = false; // escape\n\n        if (token = this.tokenizer.escape(src)) {\n          src = src.substring(token.raw.length);\n          tokens.push(token);\n          continue;\n        } // tag\n\n\n        if (token = this.tokenizer.tag(src, inLink, inRawBlock)) {\n          src = src.substring(token.raw.length);\n          inLink = token.inLink;\n          inRawBlock = token.inRawBlock;\n          var _lastToken = tokens[tokens.length - 1];\n\n          if (_lastToken && token.type === 'text' && _lastToken.type === 'text') {\n            _lastToken.raw += token.raw;\n            _lastToken.text += token.text;\n          } else {\n            tokens.push(token);\n          }\n\n          continue;\n        } // link\n\n\n        if (token = this.tokenizer.link(src)) {\n          src = src.substring(token.raw.length);\n\n          if (token.type === 'link') {\n            token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);\n          }\n\n          tokens.push(token);\n          continue;\n        } // reflink, nolink\n\n\n        if (token = this.tokenizer.reflink(src, this.tokens.links)) {\n          src = src.substring(token.raw.length);\n          var _lastToken2 = tokens[tokens.length - 1];\n\n          if (token.type === 'link') {\n            token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);\n            tokens.push(token);\n          } else if (_lastToken2 && token.type === 'text' && _lastToken2.type === 'text') {\n            _lastToken2.raw += token.raw;\n            _lastToken2.text += token.text;\n          } else {\n            tokens.push(token);\n          }\n\n          continue;\n        } // em & strong\n\n\n        if (token = this.tokenizer.emStrong(src, maskedSrc, prevChar)) {\n          src = src.substring(token.raw.length);\n          token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);\n          tokens.push(token);\n          continue;\n        } // code\n\n\n        if (token = this.tokenizer.codespan(src)) {\n          src = src.substring(token.raw.length);\n          tokens.push(token);\n          continue;\n        } // br\n\n\n        if (token = this.tokenizer.br(src)) {\n          src = src.substring(token.raw.length);\n          tokens.push(token);\n          continue;\n        } // del (gfm)\n\n\n        if (token = this.tokenizer.del(src)) {\n          src = src.substring(token.raw.length);\n          token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);\n          tokens.push(token);\n          continue;\n        } // autolink\n\n\n        if (token = this.tokenizer.autolink(src, mangle)) {\n          src = src.substring(token.raw.length);\n          tokens.push(token);\n          continue;\n        } // url (gfm)\n\n\n        if (!inLink && (token = this.tokenizer.url(src, mangle))) {\n          src = src.substring(token.raw.length);\n          tokens.push(token);\n          continue;\n        } // text\n\n\n        if (token = this.tokenizer.inlineText(src, inRawBlock, smartypants)) {\n          src = src.substring(token.raw.length);\n\n          if (token.raw.slice(-1) !== '_') {\n            // Track prevChar before string of ____ started\n            prevChar = token.raw.slice(-1);\n          }\n\n          keepPrevChar = true;\n          lastToken = tokens[tokens.length - 1];\n\n          if (lastToken && lastToken.type === 'text') {\n            lastToken.raw += token.raw;\n            lastToken.text += token.text;\n          } else {\n            tokens.push(token);\n          }\n\n          continue;\n        }\n\n        if (src) {\n          var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);\n\n          if (this.options.silent) {\n            console.error(errMsg);\n            break;\n          } else {\n            throw new Error(errMsg);\n          }\n        }\n      }\n\n      return tokens;\n    };\n\n    _createClass(Lexer, null, [{\n      key: \"rules\",\n      get: function get() {\n        return {\n          block: block,\n          inline: inline\n        };\n      }\n    }]);\n\n    return Lexer;\n  }();\n\n  var defaults$2 = defaults$5.exports.defaults;\n  var cleanUrl = helpers.cleanUrl,\n      escape$1 = helpers.escape;\n  /**\n   * Renderer\n   */\n\n  var Renderer_1 = /*#__PURE__*/function () {\n    function Renderer(options) {\n      this.options = options || defaults$2;\n    }\n\n    var _proto = Renderer.prototype;\n\n    _proto.code = function code(_code, infostring, escaped) {\n      var lang = (infostring || '').match(/\\S*/)[0];\n\n      if (this.options.highlight) {\n        var out = this.options.highlight(_code, lang);\n\n        if (out != null && out !== _code) {\n          escaped = true;\n          _code = out;\n        }\n      }\n\n      _code = _code.replace(/\\n$/, '') + '\\n';\n\n      if (!lang) {\n        return '<pre><code>' + (escaped ? _code : escape$1(_code, true)) + '</code></pre>\\n';\n      }\n\n      return '<pre><code class=\"' + this.options.langPrefix + escape$1(lang, true) + '\">' + (escaped ? _code : escape$1(_code, true)) + '</code></pre>\\n';\n    };\n\n    _proto.blockquote = function blockquote(quote) {\n      return '<blockquote>\\n' + quote + '</blockquote>\\n';\n    };\n\n    _proto.html = function html(_html) {\n      return _html;\n    };\n\n    _proto.heading = function heading(text, level, raw, slugger) {\n      if (this.options.headerIds) {\n        return '<h' + level + ' id=\"' + this.options.headerPrefix + slugger.slug(raw) + '\">' + text + '</h' + level + '>\\n';\n      } // ignore IDs\n\n\n      return '<h' + level + '>' + text + '</h' + level + '>\\n';\n    };\n\n    _proto.hr = function hr() {\n      return this.options.xhtml ? '<hr/>\\n' : '<hr>\\n';\n    };\n\n    _proto.list = function list(body, ordered, start) {\n      var type = ordered ? 'ol' : 'ul',\n          startatt = ordered && start !== 1 ? ' start=\"' + start + '\"' : '';\n      return '<' + type + startatt + '>\\n' + body + '</' + type + '>\\n';\n    };\n\n    _proto.listitem = function listitem(text) {\n      return '<li>' + text + '</li>\\n';\n    };\n\n    _proto.checkbox = function checkbox(checked) {\n      return '<input ' + (checked ? 'checked=\"\" ' : '') + 'disabled=\"\" type=\"checkbox\"' + (this.options.xhtml ? ' /' : '') + '> ';\n    };\n\n    _proto.paragraph = function paragraph(text) {\n      return '<p>' + text + '</p>\\n';\n    };\n\n    _proto.table = function table(header, body) {\n      if (body) body = '<tbody>' + body + '</tbody>';\n      return '<table>\\n' + '<thead>\\n' + header + '</thead>\\n' + body + '</table>\\n';\n    };\n\n    _proto.tablerow = function tablerow(content) {\n      return '<tr>\\n' + content + '</tr>\\n';\n    };\n\n    _proto.tablecell = function tablecell(content, flags) {\n      var type = flags.header ? 'th' : 'td';\n      var tag = flags.align ? '<' + type + ' align=\"' + flags.align + '\">' : '<' + type + '>';\n      return tag + content + '</' + type + '>\\n';\n    } // span level renderer\n    ;\n\n    _proto.strong = function strong(text) {\n      return '<strong>' + text + '</strong>';\n    };\n\n    _proto.em = function em(text) {\n      return '<em>' + text + '</em>';\n    };\n\n    _proto.codespan = function codespan(text) {\n      return '<code>' + text + '</code>';\n    };\n\n    _proto.br = function br() {\n      return this.options.xhtml ? '<br/>' : '<br>';\n    };\n\n    _proto.del = function del(text) {\n      return '<del>' + text + '</del>';\n    };\n\n    _proto.link = function link(href, title, text) {\n      href = cleanUrl(this.options.sanitize, this.options.baseUrl, href);\n\n      if (href === null) {\n        return text;\n      }\n\n      var out = '<a href=\"' + escape$1(href) + '\"';\n\n      if (title) {\n        out += ' title=\"' + title + '\"';\n      }\n\n      out += '>' + text + '</a>';\n      return out;\n    };\n\n    _proto.image = function image(href, title, text) {\n      href = cleanUrl(this.options.sanitize, this.options.baseUrl, href);\n\n      if (href === null) {\n        return text;\n      }\n\n      var out = '<img src=\"' + href + '\" alt=\"' + text + '\"';\n\n      if (title) {\n        out += ' title=\"' + title + '\"';\n      }\n\n      out += this.options.xhtml ? '/>' : '>';\n      return out;\n    };\n\n    _proto.text = function text(_text) {\n      return _text;\n    };\n\n    return Renderer;\n  }();\n\n  /**\n   * TextRenderer\n   * returns only the textual part of the token\n   */\n\n  var TextRenderer_1 = /*#__PURE__*/function () {\n    function TextRenderer() {}\n\n    var _proto = TextRenderer.prototype;\n\n    // no need for block level renderers\n    _proto.strong = function strong(text) {\n      return text;\n    };\n\n    _proto.em = function em(text) {\n      return text;\n    };\n\n    _proto.codespan = function codespan(text) {\n      return text;\n    };\n\n    _proto.del = function del(text) {\n      return text;\n    };\n\n    _proto.html = function html(text) {\n      return text;\n    };\n\n    _proto.text = function text(_text) {\n      return _text;\n    };\n\n    _proto.link = function link(href, title, text) {\n      return '' + text;\n    };\n\n    _proto.image = function image(href, title, text) {\n      return '' + text;\n    };\n\n    _proto.br = function br() {\n      return '';\n    };\n\n    return TextRenderer;\n  }();\n\n  /**\n   * Slugger generates header id\n   */\n\n  var Slugger_1 = /*#__PURE__*/function () {\n    function Slugger() {\n      this.seen = {};\n    }\n\n    var _proto = Slugger.prototype;\n\n    _proto.serialize = function serialize(value) {\n      return value.toLowerCase().trim() // remove html tags\n      .replace(/<[!\\/a-z].*?>/ig, '') // remove unwanted chars\n      .replace(/[\\u2000-\\u206F\\u2E00-\\u2E7F\\\\'!\"#$%&()*+,./:;<=>?@[\\]^`{|}~]/g, '').replace(/\\s/g, '-');\n    }\n    /**\n     * Finds the next safe (unique) slug to use\n     */\n    ;\n\n    _proto.getNextSafeSlug = function getNextSafeSlug(originalSlug, isDryRun) {\n      var slug = originalSlug;\n      var occurenceAccumulator = 0;\n\n      if (this.seen.hasOwnProperty(slug)) {\n        occurenceAccumulator = this.seen[originalSlug];\n\n        do {\n          occurenceAccumulator++;\n          slug = originalSlug + '-' + occurenceAccumulator;\n        } while (this.seen.hasOwnProperty(slug));\n      }\n\n      if (!isDryRun) {\n        this.seen[originalSlug] = occurenceAccumulator;\n        this.seen[slug] = 0;\n      }\n\n      return slug;\n    }\n    /**\n     * Convert string to unique id\n     * @param {object} options\n     * @param {boolean} options.dryrun Generates the next unique slug without updating the internal accumulator.\n     */\n    ;\n\n    _proto.slug = function slug(value, options) {\n      if (options === void 0) {\n        options = {};\n      }\n\n      var slug = this.serialize(value);\n      return this.getNextSafeSlug(slug, options.dryrun);\n    };\n\n    return Slugger;\n  }();\n\n  var Renderer$1 = Renderer_1;\n  var TextRenderer$1 = TextRenderer_1;\n  var Slugger$1 = Slugger_1;\n  var defaults$1 = defaults$5.exports.defaults;\n  var unescape = helpers.unescape;\n  /**\n   * Parsing & Compiling\n   */\n\n  var Parser_1 = /*#__PURE__*/function () {\n    function Parser(options) {\n      this.options = options || defaults$1;\n      this.options.renderer = this.options.renderer || new Renderer$1();\n      this.renderer = this.options.renderer;\n      this.renderer.options = this.options;\n      this.textRenderer = new TextRenderer$1();\n      this.slugger = new Slugger$1();\n    }\n    /**\n     * Static Parse Method\n     */\n\n\n    Parser.parse = function parse(tokens, options) {\n      var parser = new Parser(options);\n      return parser.parse(tokens);\n    }\n    /**\n     * Static Parse Inline Method\n     */\n    ;\n\n    Parser.parseInline = function parseInline(tokens, options) {\n      var parser = new Parser(options);\n      return parser.parseInline(tokens);\n    }\n    /**\n     * Parse Loop\n     */\n    ;\n\n    var _proto = Parser.prototype;\n\n    _proto.parse = function parse(tokens, top) {\n      if (top === void 0) {\n        top = true;\n      }\n\n      var out = '',\n          i,\n          j,\n          k,\n          l2,\n          l3,\n          row,\n          cell,\n          header,\n          body,\n          token,\n          ordered,\n          start,\n          loose,\n          itemBody,\n          item,\n          checked,\n          task,\n          checkbox;\n      var l = tokens.length;\n\n      for (i = 0; i < l; i++) {\n        token = tokens[i];\n\n        switch (token.type) {\n          case 'space':\n            {\n              continue;\n            }\n\n          case 'hr':\n            {\n              out += this.renderer.hr();\n              continue;\n            }\n\n          case 'heading':\n            {\n              out += this.renderer.heading(this.parseInline(token.tokens), token.depth, unescape(this.parseInline(token.tokens, this.textRenderer)), this.slugger);\n              continue;\n            }\n\n          case 'code':\n            {\n              out += this.renderer.code(token.text, token.lang, token.escaped);\n              continue;\n            }\n\n          case 'table':\n            {\n              header = ''; // header\n\n              cell = '';\n              l2 = token.header.length;\n\n              for (j = 0; j < l2; j++) {\n                cell += this.renderer.tablecell(this.parseInline(token.tokens.header[j]), {\n                  header: true,\n                  align: token.align[j]\n                });\n              }\n\n              header += this.renderer.tablerow(cell);\n              body = '';\n              l2 = token.cells.length;\n\n              for (j = 0; j < l2; j++) {\n                row = token.tokens.cells[j];\n                cell = '';\n                l3 = row.length;\n\n                for (k = 0; k < l3; k++) {\n                  cell += this.renderer.tablecell(this.parseInline(row[k]), {\n                    header: false,\n                    align: token.align[k]\n                  });\n                }\n\n                body += this.renderer.tablerow(cell);\n              }\n\n              out += this.renderer.table(header, body);\n              continue;\n            }\n\n          case 'blockquote':\n            {\n              body = this.parse(token.tokens);\n              out += this.renderer.blockquote(body);\n              continue;\n            }\n\n          case 'list':\n            {\n              ordered = token.ordered;\n              start = token.start;\n              loose = token.loose;\n              l2 = token.items.length;\n              body = '';\n\n              for (j = 0; j < l2; j++) {\n                item = token.items[j];\n                checked = item.checked;\n                task = item.task;\n                itemBody = '';\n\n                if (item.task) {\n                  checkbox = this.renderer.checkbox(checked);\n\n                  if (loose) {\n                    if (item.tokens.length > 0 && item.tokens[0].type === 'text') {\n                      item.tokens[0].text = checkbox + ' ' + item.tokens[0].text;\n\n                      if (item.tokens[0].tokens && item.tokens[0].tokens.length > 0 && item.tokens[0].tokens[0].type === 'text') {\n                        item.tokens[0].tokens[0].text = checkbox + ' ' + item.tokens[0].tokens[0].text;\n                      }\n                    } else {\n                      item.tokens.unshift({\n                        type: 'text',\n                        text: checkbox\n                      });\n                    }\n                  } else {\n                    itemBody += checkbox;\n                  }\n                }\n\n                itemBody += this.parse(item.tokens, loose);\n                body += this.renderer.listitem(itemBody, task, checked);\n              }\n\n              out += this.renderer.list(body, ordered, start);\n              continue;\n            }\n\n          case 'html':\n            {\n              // TODO parse inline content if parameter markdown=1\n              out += this.renderer.html(token.text);\n              continue;\n            }\n\n          case 'paragraph':\n            {\n              out += this.renderer.paragraph(this.parseInline(token.tokens));\n              continue;\n            }\n\n          case 'text':\n            {\n              body = token.tokens ? this.parseInline(token.tokens) : token.text;\n\n              while (i + 1 < l && tokens[i + 1].type === 'text') {\n                token = tokens[++i];\n                body += '\\n' + (token.tokens ? this.parseInline(token.tokens) : token.text);\n              }\n\n              out += top ? this.renderer.paragraph(body) : body;\n              continue;\n            }\n\n          default:\n            {\n              var errMsg = 'Token with \"' + token.type + '\" type was not found.';\n\n              if (this.options.silent) {\n                console.error(errMsg);\n                return;\n              } else {\n                throw new Error(errMsg);\n              }\n            }\n        }\n      }\n\n      return out;\n    }\n    /**\n     * Parse Inline Tokens\n     */\n    ;\n\n    _proto.parseInline = function parseInline(tokens, renderer) {\n      renderer = renderer || this.renderer;\n      var out = '',\n          i,\n          token;\n      var l = tokens.length;\n\n      for (i = 0; i < l; i++) {\n        token = tokens[i];\n\n        switch (token.type) {\n          case 'escape':\n            {\n              out += renderer.text(token.text);\n              break;\n            }\n\n          case 'html':\n            {\n              out += renderer.html(token.text);\n              break;\n            }\n\n          case 'link':\n            {\n              out += renderer.link(token.href, token.title, this.parseInline(token.tokens, renderer));\n              break;\n            }\n\n          case 'image':\n            {\n              out += renderer.image(token.href, token.title, token.text);\n              break;\n            }\n\n          case 'strong':\n            {\n              out += renderer.strong(this.parseInline(token.tokens, renderer));\n              break;\n            }\n\n          case 'em':\n            {\n              out += renderer.em(this.parseInline(token.tokens, renderer));\n              break;\n            }\n\n          case 'codespan':\n            {\n              out += renderer.codespan(token.text);\n              break;\n            }\n\n          case 'br':\n            {\n              out += renderer.br();\n              break;\n            }\n\n          case 'del':\n            {\n              out += renderer.del(this.parseInline(token.tokens, renderer));\n              break;\n            }\n\n          case 'text':\n            {\n              out += renderer.text(token.text);\n              break;\n            }\n\n          default:\n            {\n              var errMsg = 'Token with \"' + token.type + '\" type was not found.';\n\n              if (this.options.silent) {\n                console.error(errMsg);\n                return;\n              } else {\n                throw new Error(errMsg);\n              }\n            }\n        }\n      }\n\n      return out;\n    };\n\n    return Parser;\n  }();\n\n  var Lexer = Lexer_1;\n  var Parser = Parser_1;\n  var Tokenizer = Tokenizer_1;\n  var Renderer = Renderer_1;\n  var TextRenderer = TextRenderer_1;\n  var Slugger = Slugger_1;\n  var merge = helpers.merge,\n      checkSanitizeDeprecation = helpers.checkSanitizeDeprecation,\n      escape = helpers.escape;\n  var getDefaults = defaults$5.exports.getDefaults,\n      changeDefaults = defaults$5.exports.changeDefaults,\n      defaults = defaults$5.exports.defaults;\n  /**\n   * Marked\n   */\n\n  function marked(src, opt, callback) {\n    // throw error in case of non string input\n    if (typeof src === 'undefined' || src === null) {\n      throw new Error('marked(): input parameter is undefined or null');\n    }\n\n    if (typeof src !== 'string') {\n      throw new Error('marked(): input parameter is of type ' + Object.prototype.toString.call(src) + ', string expected');\n    }\n\n    if (typeof opt === 'function') {\n      callback = opt;\n      opt = null;\n    }\n\n    opt = merge({}, marked.defaults, opt || {});\n    checkSanitizeDeprecation(opt);\n\n    if (callback) {\n      var highlight = opt.highlight;\n      var tokens;\n\n      try {\n        tokens = Lexer.lex(src, opt);\n      } catch (e) {\n        return callback(e);\n      }\n\n      var done = function done(err) {\n        var out;\n\n        if (!err) {\n          try {\n            if (opt.walkTokens) {\n              marked.walkTokens(tokens, opt.walkTokens);\n            }\n\n            out = Parser.parse(tokens, opt);\n          } catch (e) {\n            err = e;\n          }\n        }\n\n        opt.highlight = highlight;\n        return err ? callback(err) : callback(null, out);\n      };\n\n      if (!highlight || highlight.length < 3) {\n        return done();\n      }\n\n      delete opt.highlight;\n      if (!tokens.length) return done();\n      var pending = 0;\n      marked.walkTokens(tokens, function (token) {\n        if (token.type === 'code') {\n          pending++;\n          setTimeout(function () {\n            highlight(token.text, token.lang, function (err, code) {\n              if (err) {\n                return done(err);\n              }\n\n              if (code != null && code !== token.text) {\n                token.text = code;\n                token.escaped = true;\n              }\n\n              pending--;\n\n              if (pending === 0) {\n                done();\n              }\n            });\n          }, 0);\n        }\n      });\n\n      if (pending === 0) {\n        done();\n      }\n\n      return;\n    }\n\n    try {\n      var _tokens = Lexer.lex(src, opt);\n\n      if (opt.walkTokens) {\n        marked.walkTokens(_tokens, opt.walkTokens);\n      }\n\n      return Parser.parse(_tokens, opt);\n    } catch (e) {\n      e.message += '\\nPlease report this to https://github.com/markedjs/marked.';\n\n      if (opt.silent) {\n        return '<p>An error occurred:</p><pre>' + escape(e.message + '', true) + '</pre>';\n      }\n\n      throw e;\n    }\n  }\n  /**\n   * Options\n   */\n\n\n  marked.options = marked.setOptions = function (opt) {\n    merge(marked.defaults, opt);\n    changeDefaults(marked.defaults);\n    return marked;\n  };\n\n  marked.getDefaults = getDefaults;\n  marked.defaults = defaults;\n  /**\n   * Use Extension\n   */\n\n  marked.use = function (extension) {\n    var opts = merge({}, extension);\n\n    if (extension.renderer) {\n      (function () {\n        var renderer = marked.defaults.renderer || new Renderer();\n\n        var _loop = function _loop(prop) {\n          var prevRenderer = renderer[prop];\n\n          renderer[prop] = function () {\n            for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n              args[_key] = arguments[_key];\n            }\n\n            var ret = extension.renderer[prop].apply(renderer, args);\n\n            if (ret === false) {\n              ret = prevRenderer.apply(renderer, args);\n            }\n\n            return ret;\n          };\n        };\n\n        for (var prop in extension.renderer) {\n          _loop(prop);\n        }\n\n        opts.renderer = renderer;\n      })();\n    }\n\n    if (extension.tokenizer) {\n      (function () {\n        var tokenizer = marked.defaults.tokenizer || new Tokenizer();\n\n        var _loop2 = function _loop2(prop) {\n          var prevTokenizer = tokenizer[prop];\n\n          tokenizer[prop] = function () {\n            for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {\n              args[_key2] = arguments[_key2];\n            }\n\n            var ret = extension.tokenizer[prop].apply(tokenizer, args);\n\n            if (ret === false) {\n              ret = prevTokenizer.apply(tokenizer, args);\n            }\n\n            return ret;\n          };\n        };\n\n        for (var prop in extension.tokenizer) {\n          _loop2(prop);\n        }\n\n        opts.tokenizer = tokenizer;\n      })();\n    }\n\n    if (extension.walkTokens) {\n      var walkTokens = marked.defaults.walkTokens;\n\n      opts.walkTokens = function (token) {\n        extension.walkTokens(token);\n\n        if (walkTokens) {\n          walkTokens(token);\n        }\n      };\n    }\n\n    marked.setOptions(opts);\n  };\n  /**\n   * Run callback for every token\n   */\n\n\n  marked.walkTokens = function (tokens, callback) {\n    for (var _iterator = _createForOfIteratorHelperLoose(tokens), _step; !(_step = _iterator()).done;) {\n      var token = _step.value;\n      callback(token);\n\n      switch (token.type) {\n        case 'table':\n          {\n            for (var _iterator2 = _createForOfIteratorHelperLoose(token.tokens.header), _step2; !(_step2 = _iterator2()).done;) {\n              var cell = _step2.value;\n              marked.walkTokens(cell, callback);\n            }\n\n            for (var _iterator3 = _createForOfIteratorHelperLoose(token.tokens.cells), _step3; !(_step3 = _iterator3()).done;) {\n              var row = _step3.value;\n\n              for (var _iterator4 = _createForOfIteratorHelperLoose(row), _step4; !(_step4 = _iterator4()).done;) {\n                var _cell = _step4.value;\n                marked.walkTokens(_cell, callback);\n              }\n            }\n\n            break;\n          }\n\n        case 'list':\n          {\n            marked.walkTokens(token.items, callback);\n            break;\n          }\n\n        default:\n          {\n            if (token.tokens) {\n              marked.walkTokens(token.tokens, callback);\n            }\n          }\n      }\n    }\n  };\n  /**\n   * Parse Inline\n   */\n\n\n  marked.parseInline = function (src, opt) {\n    // throw error in case of non string input\n    if (typeof src === 'undefined' || src === null) {\n      throw new Error('marked.parseInline(): input parameter is undefined or null');\n    }\n\n    if (typeof src !== 'string') {\n      throw new Error('marked.parseInline(): input parameter is of type ' + Object.prototype.toString.call(src) + ', string expected');\n    }\n\n    opt = merge({}, marked.defaults, opt || {});\n    checkSanitizeDeprecation(opt);\n\n    try {\n      var tokens = Lexer.lexInline(src, opt);\n\n      if (opt.walkTokens) {\n        marked.walkTokens(tokens, opt.walkTokens);\n      }\n\n      return Parser.parseInline(tokens, opt);\n    } catch (e) {\n      e.message += '\\nPlease report this to https://github.com/markedjs/marked.';\n\n      if (opt.silent) {\n        return '<p>An error occurred:</p><pre>' + escape(e.message + '', true) + '</pre>';\n      }\n\n      throw e;\n    }\n  };\n  /**\n   * Expose\n   */\n\n\n  marked.Parser = Parser;\n  marked.parser = Parser.parse;\n  marked.Renderer = Renderer;\n  marked.TextRenderer = TextRenderer;\n  marked.Lexer = Lexer;\n  marked.lexer = Lexer.lex;\n  marked.Tokenizer = Tokenizer;\n  marked.Slugger = Slugger;\n  marked.parse = marked;\n  var marked_1 = marked;\n\n  return marked_1;\n\n})));\n","var getUint64 = require('../utils/numbers.js').getUint64;\n\nvar parseSidx = function(data) {\n  var view = new DataView(data.buffer, data.byteOffset, data.byteLength),\n      result = {\n        version: data[0],\n        flags: new Uint8Array(data.subarray(1, 4)),\n        references: [],\n        referenceId: view.getUint32(4),\n        timescale: view.getUint32(8)\n      },\n    i = 12;\n\n  if (result.version === 0) {\n    result.earliestPresentationTime = view.getUint32(i);\n    result.firstOffset = view.getUint32(i + 4);\n    i += 8;\n  } else {\n    // read 64 bits\n    result.earliestPresentationTime = getUint64(data.subarray(i));\n    result.firstOffset = getUint64(data.subarray(i + 8));\n    i += 16;\n  }\n\n  i += 2; // reserved\n\n  var referenceCount = view.getUint16(i);\n\n  i += 2; // start of references\n\n  for (; referenceCount > 0; i += 12, referenceCount--) {\n    result.references.push({\n      referenceType: (data[i] & 0x80) >>> 7,\n      referencedSize: view.getUint32(i) & 0x7FFFFFFF,\n      subsegmentDuration: view.getUint32(i + 4),\n      startsWithSap: !!(data[i + 8] & 0x80),\n      sapType: (data[i + 8] & 0x70) >>> 4,\n      sapDeltaTime: view.getUint32(i + 8) & 0x0FFFFFFF\n    });\n  }\n\n  return result;\n};\n\n\nmodule.exports = parseSidx;\n","/**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n */\nvar\n  ONE_SECOND_IN_TS = 90000, // 90kHz clock\n  secondsToVideoTs,\n  secondsToAudioTs,\n  videoTsToSeconds,\n  audioTsToSeconds,\n  audioTsToVideoTs,\n  videoTsToAudioTs,\n  metadataTsToSeconds;\n\nsecondsToVideoTs = function(seconds) {\n  return seconds * ONE_SECOND_IN_TS;\n};\n\nsecondsToAudioTs = function(seconds, sampleRate) {\n  return seconds * sampleRate;\n};\n\nvideoTsToSeconds = function(timestamp) {\n  return timestamp / ONE_SECOND_IN_TS;\n};\n\naudioTsToSeconds = function(timestamp, sampleRate) {\n  return timestamp / sampleRate;\n};\n\naudioTsToVideoTs = function(timestamp, sampleRate) {\n  return secondsToVideoTs(audioTsToSeconds(timestamp, sampleRate));\n};\n\nvideoTsToAudioTs = function(timestamp, sampleRate) {\n  return secondsToAudioTs(videoTsToSeconds(timestamp), sampleRate);\n};\n\n/**\n * Adjust ID3 tag or caption timing information by the timeline pts values\n * (if keepOriginalTimestamps is false) and convert to seconds\n */\nmetadataTsToSeconds = function(timestamp, timelineStartPts, keepOriginalTimestamps) {\n  return videoTsToSeconds(keepOriginalTimestamps ? timestamp : timestamp - timelineStartPts);\n};\n\nmodule.exports = {\n  ONE_SECOND_IN_TS: ONE_SECOND_IN_TS,\n  secondsToVideoTs: secondsToVideoTs,\n  secondsToAudioTs: secondsToAudioTs,\n  videoTsToSeconds: videoTsToSeconds,\n  audioTsToSeconds: audioTsToSeconds,\n  audioTsToVideoTs: audioTsToVideoTs,\n  videoTsToAudioTs: videoTsToAudioTs,\n  metadataTsToSeconds: metadataTsToSeconds\n};\n","var MAX_UINT32 = Math.pow(2, 32);\n\nvar getUint64 = function(uint8) {\n  var dv = new DataView(uint8.buffer, uint8.byteOffset, uint8.byteLength);\n  var value;\n\n  if (dv.getBigUint64) {\n    value = dv.getBigUint64(0);\n\n    if (value < Number.MAX_SAFE_INTEGER) {\n      return Number(value);\n    }\n\n    return value;\n  }\n\n  return (dv.getUint32(0) * MAX_UINT32) + dv.getUint32(4);\n};\n\nmodule.exports = {\n  getUint64: getUint64,\n  MAX_UINT32: MAX_UINT32\n};\n","module.exports = SafeParseTuple\n\nfunction SafeParseTuple(obj, reviver) {\n    var json\n    var error = null\n\n    try {\n        json = JSON.parse(obj, reviver)\n    } catch (err) {\n        error = err\n    }\n\n    return [error, json]\n}\n","import api from \"!../../style-loader/dist/runtime/injectStylesIntoStyleTag.js\";\n            import content from \"!!../../css-loader/dist/cjs.js!../../postcss-loader/dist/cjs.js!./video-js.min.css\";\n\nvar options = {};\n\noptions.insert = \"head\";\noptions.singleton = false;\n\nvar update = api(content, options);\n\n\n\nexport default content.locals || {};","import api from \"!../../style-loader/dist/runtime/injectStylesIntoStyleTag.js\";\n            import content from \"!!../../css-loader/dist/cjs.js!../../postcss-loader/dist/cjs.js!./videojs-xr.css\";\n\nvar options = {};\n\noptions.insert = \"head\";\noptions.singleton = false;\n\nvar update = api(content, options);\n\n\n\nexport default content.locals || {};","\"use strict\";\n\nvar isOldIE = function isOldIE() {\n  var memo;\n  return function memorize() {\n    if (typeof memo === 'undefined') {\n      // Test for IE <= 9 as proposed by Browserhacks\n      // @see http://browserhacks.com/#hack-e71d8692f65334173fee715c222cb805\n      // Tests for existence of standard globals is to allow style-loader\n      // to operate correctly into non-standard environments\n      // @see https://github.com/webpack-contrib/style-loader/issues/177\n      memo = Boolean(window && document && document.all && !window.atob);\n    }\n\n    return memo;\n  };\n}();\n\nvar getTarget = function getTarget() {\n  var memo = {};\n  return function memorize(target) {\n    if (typeof memo[target] === 'undefined') {\n      var styleTarget = document.querySelector(target); // Special case to return head of iframe instead of iframe itself\n\n      if (window.HTMLIFrameElement && styleTarget instanceof window.HTMLIFrameElement) {\n        try {\n          // This will throw an exception if access to iframe is blocked\n          // due to cross-origin restrictions\n          styleTarget = styleTarget.contentDocument.head;\n        } catch (e) {\n          // istanbul ignore next\n          styleTarget = null;\n        }\n      }\n\n      memo[target] = styleTarget;\n    }\n\n    return memo[target];\n  };\n}();\n\nvar stylesInDom = [];\n\nfunction getIndexByIdentifier(identifier) {\n  var result = -1;\n\n  for (var i = 0; i < stylesInDom.length; i++) {\n    if (stylesInDom[i].identifier === identifier) {\n      result = i;\n      break;\n    }\n  }\n\n  return result;\n}\n\nfunction modulesToDom(list, options) {\n  var idCountMap = {};\n  var identifiers = [];\n\n  for (var i = 0; i < list.length; i++) {\n    var item = list[i];\n    var id = options.base ? item[0] + options.base : item[0];\n    var count = idCountMap[id] || 0;\n    var identifier = \"\".concat(id, \" \").concat(count);\n    idCountMap[id] = count + 1;\n    var index = getIndexByIdentifier(identifier);\n    var obj = {\n      css: item[1],\n      media: item[2],\n      sourceMap: item[3]\n    };\n\n    if (index !== -1) {\n      stylesInDom[index].references++;\n      stylesInDom[index].updater(obj);\n    } else {\n      stylesInDom.push({\n        identifier: identifier,\n        updater: addStyle(obj, options),\n        references: 1\n      });\n    }\n\n    identifiers.push(identifier);\n  }\n\n  return identifiers;\n}\n\nfunction insertStyleElement(options) {\n  var style = document.createElement('style');\n  var attributes = options.attributes || {};\n\n  if (typeof attributes.nonce === 'undefined') {\n    var nonce = typeof __webpack_nonce__ !== 'undefined' ? __webpack_nonce__ : null;\n\n    if (nonce) {\n      attributes.nonce = nonce;\n    }\n  }\n\n  Object.keys(attributes).forEach(function (key) {\n    style.setAttribute(key, attributes[key]);\n  });\n\n  if (typeof options.insert === 'function') {\n    options.insert(style);\n  } else {\n    var target = getTarget(options.insert || 'head');\n\n    if (!target) {\n      throw new Error(\"Couldn't find a style target. This probably means that the value for the 'insert' parameter is invalid.\");\n    }\n\n    target.appendChild(style);\n  }\n\n  return style;\n}\n\nfunction removeStyleElement(style) {\n  // istanbul ignore if\n  if (style.parentNode === null) {\n    return false;\n  }\n\n  style.parentNode.removeChild(style);\n}\n/* istanbul ignore next  */\n\n\nvar replaceText = function replaceText() {\n  var textStore = [];\n  return function replace(index, replacement) {\n    textStore[index] = replacement;\n    return textStore.filter(Boolean).join('\\n');\n  };\n}();\n\nfunction applyToSingletonTag(style, index, remove, obj) {\n  var css = remove ? '' : obj.media ? \"@media \".concat(obj.media, \" {\").concat(obj.css, \"}\") : obj.css; // For old IE\n\n  /* istanbul ignore if  */\n\n  if (style.styleSheet) {\n    style.styleSheet.cssText = replaceText(index, css);\n  } else {\n    var cssNode = document.createTextNode(css);\n    var childNodes = style.childNodes;\n\n    if (childNodes[index]) {\n      style.removeChild(childNodes[index]);\n    }\n\n    if (childNodes.length) {\n      style.insertBefore(cssNode, childNodes[index]);\n    } else {\n      style.appendChild(cssNode);\n    }\n  }\n}\n\nfunction applyToTag(style, options, obj) {\n  var css = obj.css;\n  var media = obj.media;\n  var sourceMap = obj.sourceMap;\n\n  if (media) {\n    style.setAttribute('media', media);\n  } else {\n    style.removeAttribute('media');\n  }\n\n  if (sourceMap && typeof btoa !== 'undefined') {\n    css += \"\\n/*# sourceMappingURL=data:application/json;base64,\".concat(btoa(unescape(encodeURIComponent(JSON.stringify(sourceMap)))), \" */\");\n  } // For old IE\n\n  /* istanbul ignore if  */\n\n\n  if (style.styleSheet) {\n    style.styleSheet.cssText = css;\n  } else {\n    while (style.firstChild) {\n      style.removeChild(style.firstChild);\n    }\n\n    style.appendChild(document.createTextNode(css));\n  }\n}\n\nvar singleton = null;\nvar singletonCounter = 0;\n\nfunction addStyle(obj, options) {\n  var style;\n  var update;\n  var remove;\n\n  if (options.singleton) {\n    var styleIndex = singletonCounter++;\n    style = singleton || (singleton = insertStyleElement(options));\n    update = applyToSingletonTag.bind(null, style, styleIndex, false);\n    remove = applyToSingletonTag.bind(null, style, styleIndex, true);\n  } else {\n    style = insertStyleElement(options);\n    update = applyToTag.bind(null, style, options);\n\n    remove = function remove() {\n      removeStyleElement(style);\n    };\n  }\n\n  update(obj);\n  return function updateStyle(newObj) {\n    if (newObj) {\n      if (newObj.css === obj.css && newObj.media === obj.media && newObj.sourceMap === obj.sourceMap) {\n        return;\n      }\n\n      update(obj = newObj);\n    } else {\n      remove();\n    }\n  };\n}\n\nmodule.exports = function (list, options) {\n  options = options || {}; // Force single-tag solution on IE6-9, which has a hard limit on the # of <style>\n  // tags it will allow on a page\n\n  if (!options.singleton && typeof options.singleton !== 'boolean') {\n    options.singleton = isOldIE();\n  }\n\n  list = list || [];\n  var lastIdentifiers = modulesToDom(list, options);\n  return function update(newList) {\n    newList = newList || [];\n\n    if (Object.prototype.toString.call(newList) !== '[object Array]') {\n      return;\n    }\n\n    for (var i = 0; i < lastIdentifiers.length; i++) {\n      var identifier = lastIdentifiers[i];\n      var index = getIndexByIdentifier(identifier);\n      stylesInDom[index].references--;\n    }\n\n    var newLastIdentifiers = modulesToDom(newList, options);\n\n    for (var _i = 0; _i < lastIdentifiers.length; _i++) {\n      var _identifier = lastIdentifiers[_i];\n\n      var _index = getIndexByIdentifier(_identifier);\n\n      if (stylesInDom[_index].references === 0) {\n        stylesInDom[_index].updater();\n\n        stylesInDom.splice(_index, 1);\n      }\n    }\n\n    lastIdentifiers = newLastIdentifiers;\n  };\n};","// threejs.org/license\nconst REVISION = '125';\nconst MOUSE = { LEFT: 0, MIDDLE: 1, RIGHT: 2, ROTATE: 0, DOLLY: 1, PAN: 2 };\nconst TOUCH = { ROTATE: 0, PAN: 1, DOLLY_PAN: 2, DOLLY_ROTATE: 3 };\nconst CullFaceNone = 0;\nconst CullFaceBack = 1;\nconst CullFaceFront = 2;\nconst CullFaceFrontBack = 3;\nconst BasicShadowMap = 0;\nconst PCFShadowMap = 1;\nconst PCFSoftShadowMap = 2;\nconst VSMShadowMap = 3;\nconst FrontSide = 0;\nconst BackSide = 1;\nconst DoubleSide = 2;\nconst FlatShading = 1;\nconst SmoothShading = 2;\nconst NoBlending = 0;\nconst NormalBlending = 1;\nconst AdditiveBlending = 2;\nconst SubtractiveBlending = 3;\nconst MultiplyBlending = 4;\nconst CustomBlending = 5;\nconst AddEquation = 100;\nconst SubtractEquation = 101;\nconst ReverseSubtractEquation = 102;\nconst MinEquation = 103;\nconst MaxEquation = 104;\nconst ZeroFactor = 200;\nconst OneFactor = 201;\nconst SrcColorFactor = 202;\nconst OneMinusSrcColorFactor = 203;\nconst SrcAlphaFactor = 204;\nconst OneMinusSrcAlphaFactor = 205;\nconst DstAlphaFactor = 206;\nconst OneMinusDstAlphaFactor = 207;\nconst DstColorFactor = 208;\nconst OneMinusDstColorFactor = 209;\nconst SrcAlphaSaturateFactor = 210;\nconst NeverDepth = 0;\nconst AlwaysDepth = 1;\nconst LessDepth = 2;\nconst LessEqualDepth = 3;\nconst EqualDepth = 4;\nconst GreaterEqualDepth = 5;\nconst GreaterDepth = 6;\nconst NotEqualDepth = 7;\nconst MultiplyOperation = 0;\nconst MixOperation = 1;\nconst AddOperation = 2;\nconst NoToneMapping = 0;\nconst LinearToneMapping = 1;\nconst ReinhardToneMapping = 2;\nconst CineonToneMapping = 3;\nconst ACESFilmicToneMapping = 4;\nconst CustomToneMapping = 5;\n\nconst UVMapping = 300;\nconst CubeReflectionMapping = 301;\nconst CubeRefractionMapping = 302;\nconst EquirectangularReflectionMapping = 303;\nconst EquirectangularRefractionMapping = 304;\nconst CubeUVReflectionMapping = 306;\nconst CubeUVRefractionMapping = 307;\nconst RepeatWrapping = 1000;\nconst ClampToEdgeWrapping = 1001;\nconst MirroredRepeatWrapping = 1002;\nconst NearestFilter = 1003;\nconst NearestMipmapNearestFilter = 1004;\nconst NearestMipMapNearestFilter = 1004;\nconst NearestMipmapLinearFilter = 1005;\nconst NearestMipMapLinearFilter = 1005;\nconst LinearFilter = 1006;\nconst LinearMipmapNearestFilter = 1007;\nconst LinearMipMapNearestFilter = 1007;\nconst LinearMipmapLinearFilter = 1008;\nconst LinearMipMapLinearFilter = 1008;\nconst UnsignedByteType = 1009;\nconst ByteType = 1010;\nconst ShortType = 1011;\nconst UnsignedShortType = 1012;\nconst IntType = 1013;\nconst UnsignedIntType = 1014;\nconst FloatType = 1015;\nconst HalfFloatType = 1016;\nconst UnsignedShort4444Type = 1017;\nconst UnsignedShort5551Type = 1018;\nconst UnsignedShort565Type = 1019;\nconst UnsignedInt248Type = 1020;\nconst AlphaFormat = 1021;\nconst RGBFormat = 1022;\nconst RGBAFormat = 1023;\nconst LuminanceFormat = 1024;\nconst LuminanceAlphaFormat = 1025;\nconst RGBEFormat = RGBAFormat;\nconst DepthFormat = 1026;\nconst DepthStencilFormat = 1027;\nconst RedFormat = 1028;\nconst RedIntegerFormat = 1029;\nconst RGFormat = 1030;\nconst RGIntegerFormat = 1031;\nconst RGBIntegerFormat = 1032;\nconst RGBAIntegerFormat = 1033;\n\nconst RGB_S3TC_DXT1_Format = 33776;\nconst RGBA_S3TC_DXT1_Format = 33777;\nconst RGBA_S3TC_DXT3_Format = 33778;\nconst RGBA_S3TC_DXT5_Format = 33779;\nconst RGB_PVRTC_4BPPV1_Format = 35840;\nconst RGB_PVRTC_2BPPV1_Format = 35841;\nconst RGBA_PVRTC_4BPPV1_Format = 35842;\nconst RGBA_PVRTC_2BPPV1_Format = 35843;\nconst RGB_ETC1_Format = 36196;\nconst RGB_ETC2_Format = 37492;\nconst RGBA_ETC2_EAC_Format = 37496;\nconst RGBA_ASTC_4x4_Format = 37808;\nconst RGBA_ASTC_5x4_Format = 37809;\nconst RGBA_ASTC_5x5_Format = 37810;\nconst RGBA_ASTC_6x5_Format = 37811;\nconst RGBA_ASTC_6x6_Format = 37812;\nconst RGBA_ASTC_8x5_Format = 37813;\nconst RGBA_ASTC_8x6_Format = 37814;\nconst RGBA_ASTC_8x8_Format = 37815;\nconst RGBA_ASTC_10x5_Format = 37816;\nconst RGBA_ASTC_10x6_Format = 37817;\nconst RGBA_ASTC_10x8_Format = 37818;\nconst RGBA_ASTC_10x10_Format = 37819;\nconst RGBA_ASTC_12x10_Format = 37820;\nconst RGBA_ASTC_12x12_Format = 37821;\nconst RGBA_BPTC_Format = 36492;\nconst SRGB8_ALPHA8_ASTC_4x4_Format = 37840;\nconst SRGB8_ALPHA8_ASTC_5x4_Format = 37841;\nconst SRGB8_ALPHA8_ASTC_5x5_Format = 37842;\nconst SRGB8_ALPHA8_ASTC_6x5_Format = 37843;\nconst SRGB8_ALPHA8_ASTC_6x6_Format = 37844;\nconst SRGB8_ALPHA8_ASTC_8x5_Format = 37845;\nconst SRGB8_ALPHA8_ASTC_8x6_Format = 37846;\nconst SRGB8_ALPHA8_ASTC_8x8_Format = 37847;\nconst SRGB8_ALPHA8_ASTC_10x5_Format = 37848;\nconst SRGB8_ALPHA8_ASTC_10x6_Format = 37849;\nconst SRGB8_ALPHA8_ASTC_10x8_Format = 37850;\nconst SRGB8_ALPHA8_ASTC_10x10_Format = 37851;\nconst SRGB8_ALPHA8_ASTC_12x10_Format = 37852;\nconst SRGB8_ALPHA8_ASTC_12x12_Format = 37853;\nconst LoopOnce = 2200;\nconst LoopRepeat = 2201;\nconst LoopPingPong = 2202;\nconst InterpolateDiscrete = 2300;\nconst InterpolateLinear = 2301;\nconst InterpolateSmooth = 2302;\nconst ZeroCurvatureEnding = 2400;\nconst ZeroSlopeEnding = 2401;\nconst WrapAroundEnding = 2402;\nconst NormalAnimationBlendMode = 2500;\nconst AdditiveAnimationBlendMode = 2501;\nconst TrianglesDrawMode = 0;\nconst TriangleStripDrawMode = 1;\nconst TriangleFanDrawMode = 2;\nconst LinearEncoding = 3000;\nconst sRGBEncoding = 3001;\nconst GammaEncoding = 3007;\nconst RGBEEncoding = 3002;\nconst LogLuvEncoding = 3003;\nconst RGBM7Encoding = 3004;\nconst RGBM16Encoding = 3005;\nconst RGBDEncoding = 3006;\nconst BasicDepthPacking = 3200;\nconst RGBADepthPacking = 3201;\nconst TangentSpaceNormalMap = 0;\nconst ObjectSpaceNormalMap = 1;\n\nconst ZeroStencilOp = 0;\nconst KeepStencilOp = 7680;\nconst ReplaceStencilOp = 7681;\nconst IncrementStencilOp = 7682;\nconst DecrementStencilOp = 7683;\nconst IncrementWrapStencilOp = 34055;\nconst DecrementWrapStencilOp = 34056;\nconst InvertStencilOp = 5386;\n\nconst NeverStencilFunc = 512;\nconst LessStencilFunc = 513;\nconst EqualStencilFunc = 514;\nconst LessEqualStencilFunc = 515;\nconst GreaterStencilFunc = 516;\nconst NotEqualStencilFunc = 517;\nconst GreaterEqualStencilFunc = 518;\nconst AlwaysStencilFunc = 519;\n\nconst StaticDrawUsage = 35044;\nconst DynamicDrawUsage = 35048;\nconst StreamDrawUsage = 35040;\nconst StaticReadUsage = 35045;\nconst DynamicReadUsage = 35049;\nconst StreamReadUsage = 35041;\nconst StaticCopyUsage = 35046;\nconst DynamicCopyUsage = 35050;\nconst StreamCopyUsage = 35042;\n\nconst GLSL1 = '100';\nconst GLSL3 = '300 es';\n\n/**\n * https://github.com/mrdoob/eventdispatcher.js/\n */\n\nfunction EventDispatcher() {}\n\nObject.assign( EventDispatcher.prototype, {\n\n\taddEventListener: function ( type, listener ) {\n\n\t\tif ( this._listeners === undefined ) this._listeners = {};\n\n\t\tconst listeners = this._listeners;\n\n\t\tif ( listeners[ type ] === undefined ) {\n\n\t\t\tlisteners[ type ] = [];\n\n\t\t}\n\n\t\tif ( listeners[ type ].indexOf( listener ) === - 1 ) {\n\n\t\t\tlisteners[ type ].push( listener );\n\n\t\t}\n\n\t},\n\n\thasEventListener: function ( type, listener ) {\n\n\t\tif ( this._listeners === undefined ) return false;\n\n\t\tconst listeners = this._listeners;\n\n\t\treturn listeners[ type ] !== undefined && listeners[ type ].indexOf( listener ) !== - 1;\n\n\t},\n\n\tremoveEventListener: function ( type, listener ) {\n\n\t\tif ( this._listeners === undefined ) return;\n\n\t\tconst listeners = this._listeners;\n\t\tconst listenerArray = listeners[ type ];\n\n\t\tif ( listenerArray !== undefined ) {\n\n\t\t\tconst index = listenerArray.indexOf( listener );\n\n\t\t\tif ( index !== - 1 ) {\n\n\t\t\t\tlistenerArray.splice( index, 1 );\n\n\t\t\t}\n\n\t\t}\n\n\t},\n\n\tdispatchEvent: function ( event ) {\n\n\t\tif ( this._listeners === undefined ) return;\n\n\t\tconst listeners = this._listeners;\n\t\tconst listenerArray = listeners[ event.type ];\n\n\t\tif ( listenerArray !== undefined ) {\n\n\t\t\tevent.target = this;\n\n\t\t\t// Make a copy, in case listeners are removed while iterating.\n\t\t\tconst array = listenerArray.slice( 0 );\n\n\t\t\tfor ( let i = 0, l = array.length; i < l; i ++ ) {\n\n\t\t\t\tarray[ i ].call( this, event );\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n} );\n\nconst _lut = [];\n\nfor ( let i = 0; i < 256; i ++ ) {\n\n\t_lut[ i ] = ( i < 16 ? '0' : '' ) + ( i ).toString( 16 );\n\n}\n\nlet _seed = 1234567;\n\nconst MathUtils = {\n\n\tDEG2RAD: Math.PI / 180,\n\tRAD2DEG: 180 / Math.PI,\n\n\tgenerateUUID: function () {\n\n\t\t// http://stackoverflow.com/questions/105034/how-to-create-a-guid-uuid-in-javascript/21963136#21963136\n\n\t\tconst d0 = Math.random() * 0xffffffff | 0;\n\t\tconst d1 = Math.random() * 0xffffffff | 0;\n\t\tconst d2 = Math.random() * 0xffffffff | 0;\n\t\tconst d3 = Math.random() * 0xffffffff | 0;\n\t\tconst uuid = _lut[ d0 & 0xff ] + _lut[ d0 >> 8 & 0xff ] + _lut[ d0 >> 16 & 0xff ] + _lut[ d0 >> 24 & 0xff ] + '-' +\n\t\t\t_lut[ d1 & 0xff ] + _lut[ d1 >> 8 & 0xff ] + '-' + _lut[ d1 >> 16 & 0x0f | 0x40 ] + _lut[ d1 >> 24 & 0xff ] + '-' +\n\t\t\t_lut[ d2 & 0x3f | 0x80 ] + _lut[ d2 >> 8 & 0xff ] + '-' + _lut[ d2 >> 16 & 0xff ] + _lut[ d2 >> 24 & 0xff ] +\n\t\t\t_lut[ d3 & 0xff ] + _lut[ d3 >> 8 & 0xff ] + _lut[ d3 >> 16 & 0xff ] + _lut[ d3 >> 24 & 0xff ];\n\n\t\t// .toUpperCase() here flattens concatenated strings to save heap memory space.\n\t\treturn uuid.toUpperCase();\n\n\t},\n\n\tclamp: function ( value, min, max ) {\n\n\t\treturn Math.max( min, Math.min( max, value ) );\n\n\t},\n\n\t// compute euclidian modulo of m % n\n\t// https://en.wikipedia.org/wiki/Modulo_operation\n\n\teuclideanModulo: function ( n, m ) {\n\n\t\treturn ( ( n % m ) + m ) % m;\n\n\t},\n\n\t// Linear mapping from range <a1, a2> to range <b1, b2>\n\n\tmapLinear: function ( x, a1, a2, b1, b2 ) {\n\n\t\treturn b1 + ( x - a1 ) * ( b2 - b1 ) / ( a2 - a1 );\n\n\t},\n\n\t// https://en.wikipedia.org/wiki/Linear_interpolation\n\n\tlerp: function ( x, y, t ) {\n\n\t\treturn ( 1 - t ) * x + t * y;\n\n\t},\n\n\t// http://www.rorydriscoll.com/2016/03/07/frame-rate-independent-damping-using-lerp/\n\n\tdamp: function ( x, y, lambda, dt ) {\n\n\t\treturn MathUtils.lerp( x, y, 1 - Math.exp( - lambda * dt ) );\n\n\t},\n\n\t// https://www.desmos.com/calculator/vcsjnyz7x4\n\n\tpingpong: function ( x, length = 1 ) {\n\n\t\treturn length - Math.abs( MathUtils.euclideanModulo( x, length * 2 ) - length );\n\n\t},\n\n\t// http://en.wikipedia.org/wiki/Smoothstep\n\n\tsmoothstep: function ( x, min, max ) {\n\n\t\tif ( x <= min ) return 0;\n\t\tif ( x >= max ) return 1;\n\n\t\tx = ( x - min ) / ( max - min );\n\n\t\treturn x * x * ( 3 - 2 * x );\n\n\t},\n\n\tsmootherstep: function ( x, min, max ) {\n\n\t\tif ( x <= min ) return 0;\n\t\tif ( x >= max ) return 1;\n\n\t\tx = ( x - min ) / ( max - min );\n\n\t\treturn x * x * x * ( x * ( x * 6 - 15 ) + 10 );\n\n\t},\n\n\t// Random integer from <low, high> interval\n\n\trandInt: function ( low, high ) {\n\n\t\treturn low + Math.floor( Math.random() * ( high - low + 1 ) );\n\n\t},\n\n\t// Random float from <low, high> interval\n\n\trandFloat: function ( low, high ) {\n\n\t\treturn low + Math.random() * ( high - low );\n\n\t},\n\n\t// Random float from <-range/2, range/2> interval\n\n\trandFloatSpread: function ( range ) {\n\n\t\treturn range * ( 0.5 - Math.random() );\n\n\t},\n\n\t// Deterministic pseudo-random float in the interval [ 0, 1 ]\n\n\tseededRandom: function ( s ) {\n\n\t\tif ( s !== undefined ) _seed = s % 2147483647;\n\n\t\t// Park-Miller algorithm\n\n\t\t_seed = _seed * 16807 % 2147483647;\n\n\t\treturn ( _seed - 1 ) / 2147483646;\n\n\t},\n\n\tdegToRad: function ( degrees ) {\n\n\t\treturn degrees * MathUtils.DEG2RAD;\n\n\t},\n\n\tradToDeg: function ( radians ) {\n\n\t\treturn radians * MathUtils.RAD2DEG;\n\n\t},\n\n\tisPowerOfTwo: function ( value ) {\n\n\t\treturn ( value & ( value - 1 ) ) === 0 && value !== 0;\n\n\t},\n\n\tceilPowerOfTwo: function ( value ) {\n\n\t\treturn Math.pow( 2, Math.ceil( Math.log( value ) / Math.LN2 ) );\n\n\t},\n\n\tfloorPowerOfTwo: function ( value ) {\n\n\t\treturn Math.pow( 2, Math.floor( Math.log( value ) / Math.LN2 ) );\n\n\t},\n\n\tsetQuaternionFromProperEuler: function ( q, a, b, c, order ) {\n\n\t\t// Intrinsic Proper Euler Angles - see https://en.wikipedia.org/wiki/Euler_angles\n\n\t\t// rotations are applied to the axes in the order specified by 'order'\n\t\t// rotation by angle 'a' is applied first, then by angle 'b', then by angle 'c'\n\t\t// angles are in radians\n\n\t\tconst cos = Math.cos;\n\t\tconst sin = Math.sin;\n\n\t\tconst c2 = cos( b / 2 );\n\t\tconst s2 = sin( b / 2 );\n\n\t\tconst c13 = cos( ( a + c ) / 2 );\n\t\tconst s13 = sin( ( a + c ) / 2 );\n\n\t\tconst c1_3 = cos( ( a - c ) / 2 );\n\t\tconst s1_3 = sin( ( a - c ) / 2 );\n\n\t\tconst c3_1 = cos( ( c - a ) / 2 );\n\t\tconst s3_1 = sin( ( c - a ) / 2 );\n\n\t\tswitch ( order ) {\n\n\t\t\tcase 'XYX':\n\t\t\t\tq.set( c2 * s13, s2 * c1_3, s2 * s1_3, c2 * c13 );\n\t\t\t\tbreak;\n\n\t\t\tcase 'YZY':\n\t\t\t\tq.set( s2 * s1_3, c2 * s13, s2 * c1_3, c2 * c13 );\n\t\t\t\tbreak;\n\n\t\t\tcase 'ZXZ':\n\t\t\t\tq.set( s2 * c1_3, s2 * s1_3, c2 * s13, c2 * c13 );\n\t\t\t\tbreak;\n\n\t\t\tcase 'XZX':\n\t\t\t\tq.set( c2 * s13, s2 * s3_1, s2 * c3_1, c2 * c13 );\n\t\t\t\tbreak;\n\n\t\t\tcase 'YXY':\n\t\t\t\tq.set( s2 * c3_1, c2 * s13, s2 * s3_1, c2 * c13 );\n\t\t\t\tbreak;\n\n\t\t\tcase 'ZYZ':\n\t\t\t\tq.set( s2 * s3_1, s2 * c3_1, c2 * s13, c2 * c13 );\n\t\t\t\tbreak;\n\n\t\t\tdefault:\n\t\t\t\tconsole.warn( 'THREE.MathUtils: .setQuaternionFromProperEuler() encountered an unknown order: ' + order );\n\n\t\t}\n\n\t}\n\n};\n\nclass Vector2 {\n\n\tconstructor( x = 0, y = 0 ) {\n\n\t\tObject.defineProperty( this, 'isVector2', { value: true } );\n\n\t\tthis.x = x;\n\t\tthis.y = y;\n\n\t}\n\n\tget width() {\n\n\t\treturn this.x;\n\n\t}\n\n\tset width( value ) {\n\n\t\tthis.x = value;\n\n\t}\n\n\tget height() {\n\n\t\treturn this.y;\n\n\t}\n\n\tset height( value ) {\n\n\t\tthis.y = value;\n\n\t}\n\n\tset( x, y ) {\n\n\t\tthis.x = x;\n\t\tthis.y = y;\n\n\t\treturn this;\n\n\t}\n\n\tsetScalar( scalar ) {\n\n\t\tthis.x = scalar;\n\t\tthis.y = scalar;\n\n\t\treturn this;\n\n\t}\n\n\tsetX( x ) {\n\n\t\tthis.x = x;\n\n\t\treturn this;\n\n\t}\n\n\tsetY( y ) {\n\n\t\tthis.y = y;\n\n\t\treturn this;\n\n\t}\n\n\tsetComponent( index, value ) {\n\n\t\tswitch ( index ) {\n\n\t\t\tcase 0: this.x = value; break;\n\t\t\tcase 1: this.y = value; break;\n\t\t\tdefault: throw new Error( 'index is out of range: ' + index );\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n\tgetComponent( index ) {\n\n\t\tswitch ( index ) {\n\n\t\t\tcase 0: return this.x;\n\t\t\tcase 1: return this.y;\n\t\t\tdefault: throw new Error( 'index is out of range: ' + index );\n\n\t\t}\n\n\t}\n\n\tclone() {\n\n\t\treturn new this.constructor( this.x, this.y );\n\n\t}\n\n\tcopy( v ) {\n\n\t\tthis.x = v.x;\n\t\tthis.y = v.y;\n\n\t\treturn this;\n\n\t}\n\n\tadd( v, w ) {\n\n\t\tif ( w !== undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Vector2: .add() now only accepts one argument. Use .addVectors( a, b ) instead.' );\n\t\t\treturn this.addVectors( v, w );\n\n\t\t}\n\n\t\tthis.x += v.x;\n\t\tthis.y += v.y;\n\n\t\treturn this;\n\n\t}\n\n\taddScalar( s ) {\n\n\t\tthis.x += s;\n\t\tthis.y += s;\n\n\t\treturn this;\n\n\t}\n\n\taddVectors( a, b ) {\n\n\t\tthis.x = a.x + b.x;\n\t\tthis.y = a.y + b.y;\n\n\t\treturn this;\n\n\t}\n\n\taddScaledVector( v, s ) {\n\n\t\tthis.x += v.x * s;\n\t\tthis.y += v.y * s;\n\n\t\treturn this;\n\n\t}\n\n\tsub( v, w ) {\n\n\t\tif ( w !== undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Vector2: .sub() now only accepts one argument. Use .subVectors( a, b ) instead.' );\n\t\t\treturn this.subVectors( v, w );\n\n\t\t}\n\n\t\tthis.x -= v.x;\n\t\tthis.y -= v.y;\n\n\t\treturn this;\n\n\t}\n\n\tsubScalar( s ) {\n\n\t\tthis.x -= s;\n\t\tthis.y -= s;\n\n\t\treturn this;\n\n\t}\n\n\tsubVectors( a, b ) {\n\n\t\tthis.x = a.x - b.x;\n\t\tthis.y = a.y - b.y;\n\n\t\treturn this;\n\n\t}\n\n\tmultiply( v ) {\n\n\t\tthis.x *= v.x;\n\t\tthis.y *= v.y;\n\n\t\treturn this;\n\n\t}\n\n\tmultiplyScalar( scalar ) {\n\n\t\tthis.x *= scalar;\n\t\tthis.y *= scalar;\n\n\t\treturn this;\n\n\t}\n\n\tdivide( v ) {\n\n\t\tthis.x /= v.x;\n\t\tthis.y /= v.y;\n\n\t\treturn this;\n\n\t}\n\n\tdivideScalar( scalar ) {\n\n\t\treturn this.multiplyScalar( 1 / scalar );\n\n\t}\n\n\tapplyMatrix3( m ) {\n\n\t\tconst x = this.x, y = this.y;\n\t\tconst e = m.elements;\n\n\t\tthis.x = e[ 0 ] * x + e[ 3 ] * y + e[ 6 ];\n\t\tthis.y = e[ 1 ] * x + e[ 4 ] * y + e[ 7 ];\n\n\t\treturn this;\n\n\t}\n\n\tmin( v ) {\n\n\t\tthis.x = Math.min( this.x, v.x );\n\t\tthis.y = Math.min( this.y, v.y );\n\n\t\treturn this;\n\n\t}\n\n\tmax( v ) {\n\n\t\tthis.x = Math.max( this.x, v.x );\n\t\tthis.y = Math.max( this.y, v.y );\n\n\t\treturn this;\n\n\t}\n\n\tclamp( min, max ) {\n\n\t\t// assumes min < max, componentwise\n\n\t\tthis.x = Math.max( min.x, Math.min( max.x, this.x ) );\n\t\tthis.y = Math.max( min.y, Math.min( max.y, this.y ) );\n\n\t\treturn this;\n\n\t}\n\n\tclampScalar( minVal, maxVal ) {\n\n\t\tthis.x = Math.max( minVal, Math.min( maxVal, this.x ) );\n\t\tthis.y = Math.max( minVal, Math.min( maxVal, this.y ) );\n\n\t\treturn this;\n\n\t}\n\n\tclampLength( min, max ) {\n\n\t\tconst length = this.length();\n\n\t\treturn this.divideScalar( length || 1 ).multiplyScalar( Math.max( min, Math.min( max, length ) ) );\n\n\t}\n\n\tfloor() {\n\n\t\tthis.x = Math.floor( this.x );\n\t\tthis.y = Math.floor( this.y );\n\n\t\treturn this;\n\n\t}\n\n\tceil() {\n\n\t\tthis.x = Math.ceil( this.x );\n\t\tthis.y = Math.ceil( this.y );\n\n\t\treturn this;\n\n\t}\n\n\tround() {\n\n\t\tthis.x = Math.round( this.x );\n\t\tthis.y = Math.round( this.y );\n\n\t\treturn this;\n\n\t}\n\n\troundToZero() {\n\n\t\tthis.x = ( this.x < 0 ) ? Math.ceil( this.x ) : Math.floor( this.x );\n\t\tthis.y = ( this.y < 0 ) ? Math.ceil( this.y ) : Math.floor( this.y );\n\n\t\treturn this;\n\n\t}\n\n\tnegate() {\n\n\t\tthis.x = - this.x;\n\t\tthis.y = - this.y;\n\n\t\treturn this;\n\n\t}\n\n\tdot( v ) {\n\n\t\treturn this.x * v.x + this.y * v.y;\n\n\t}\n\n\tcross( v ) {\n\n\t\treturn this.x * v.y - this.y * v.x;\n\n\t}\n\n\tlengthSq() {\n\n\t\treturn this.x * this.x + this.y * this.y;\n\n\t}\n\n\tlength() {\n\n\t\treturn Math.sqrt( this.x * this.x + this.y * this.y );\n\n\t}\n\n\tmanhattanLength() {\n\n\t\treturn Math.abs( this.x ) + Math.abs( this.y );\n\n\t}\n\n\tnormalize() {\n\n\t\treturn this.divideScalar( this.length() || 1 );\n\n\t}\n\n\tangle() {\n\n\t\t// computes the angle in radians with respect to the positive x-axis\n\n\t\tconst angle = Math.atan2( - this.y, - this.x ) + Math.PI;\n\n\t\treturn angle;\n\n\t}\n\n\tdistanceTo( v ) {\n\n\t\treturn Math.sqrt( this.distanceToSquared( v ) );\n\n\t}\n\n\tdistanceToSquared( v ) {\n\n\t\tconst dx = this.x - v.x, dy = this.y - v.y;\n\t\treturn dx * dx + dy * dy;\n\n\t}\n\n\tmanhattanDistanceTo( v ) {\n\n\t\treturn Math.abs( this.x - v.x ) + Math.abs( this.y - v.y );\n\n\t}\n\n\tsetLength( length ) {\n\n\t\treturn this.normalize().multiplyScalar( length );\n\n\t}\n\n\tlerp( v, alpha ) {\n\n\t\tthis.x += ( v.x - this.x ) * alpha;\n\t\tthis.y += ( v.y - this.y ) * alpha;\n\n\t\treturn this;\n\n\t}\n\n\tlerpVectors( v1, v2, alpha ) {\n\n\t\tthis.x = v1.x + ( v2.x - v1.x ) * alpha;\n\t\tthis.y = v1.y + ( v2.y - v1.y ) * alpha;\n\n\t\treturn this;\n\n\t}\n\n\tequals( v ) {\n\n\t\treturn ( ( v.x === this.x ) && ( v.y === this.y ) );\n\n\t}\n\n\tfromArray( array, offset = 0 ) {\n\n\t\tthis.x = array[ offset ];\n\t\tthis.y = array[ offset + 1 ];\n\n\t\treturn this;\n\n\t}\n\n\ttoArray( array = [], offset = 0 ) {\n\n\t\tarray[ offset ] = this.x;\n\t\tarray[ offset + 1 ] = this.y;\n\n\t\treturn array;\n\n\t}\n\n\tfromBufferAttribute( attribute, index, offset ) {\n\n\t\tif ( offset !== undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Vector2: offset has been removed from .fromBufferAttribute().' );\n\n\t\t}\n\n\t\tthis.x = attribute.getX( index );\n\t\tthis.y = attribute.getY( index );\n\n\t\treturn this;\n\n\t}\n\n\trotateAround( center, angle ) {\n\n\t\tconst c = Math.cos( angle ), s = Math.sin( angle );\n\n\t\tconst x = this.x - center.x;\n\t\tconst y = this.y - center.y;\n\n\t\tthis.x = x * c - y * s + center.x;\n\t\tthis.y = x * s + y * c + center.y;\n\n\t\treturn this;\n\n\t}\n\n\trandom() {\n\n\t\tthis.x = Math.random();\n\t\tthis.y = Math.random();\n\n\t\treturn this;\n\n\t}\n\n}\n\nclass Matrix3 {\n\n\tconstructor() {\n\n\t\tObject.defineProperty( this, 'isMatrix3', { value: true } );\n\n\t\tthis.elements = [\n\n\t\t\t1, 0, 0,\n\t\t\t0, 1, 0,\n\t\t\t0, 0, 1\n\n\t\t];\n\n\t\tif ( arguments.length > 0 ) {\n\n\t\t\tconsole.error( 'THREE.Matrix3: the constructor no longer reads arguments. use .set() instead.' );\n\n\t\t}\n\n\t}\n\n\tset( n11, n12, n13, n21, n22, n23, n31, n32, n33 ) {\n\n\t\tconst te = this.elements;\n\n\t\tte[ 0 ] = n11; te[ 1 ] = n21; te[ 2 ] = n31;\n\t\tte[ 3 ] = n12; te[ 4 ] = n22; te[ 5 ] = n32;\n\t\tte[ 6 ] = n13; te[ 7 ] = n23; te[ 8 ] = n33;\n\n\t\treturn this;\n\n\t}\n\n\tidentity() {\n\n\t\tthis.set(\n\n\t\t\t1, 0, 0,\n\t\t\t0, 1, 0,\n\t\t\t0, 0, 1\n\n\t\t);\n\n\t\treturn this;\n\n\t}\n\n\tclone() {\n\n\t\treturn new this.constructor().fromArray( this.elements );\n\n\t}\n\n\tcopy( m ) {\n\n\t\tconst te = this.elements;\n\t\tconst me = m.elements;\n\n\t\tte[ 0 ] = me[ 0 ]; te[ 1 ] = me[ 1 ]; te[ 2 ] = me[ 2 ];\n\t\tte[ 3 ] = me[ 3 ]; te[ 4 ] = me[ 4 ]; te[ 5 ] = me[ 5 ];\n\t\tte[ 6 ] = me[ 6 ]; te[ 7 ] = me[ 7 ]; te[ 8 ] = me[ 8 ];\n\n\t\treturn this;\n\n\t}\n\n\textractBasis( xAxis, yAxis, zAxis ) {\n\n\t\txAxis.setFromMatrix3Column( this, 0 );\n\t\tyAxis.setFromMatrix3Column( this, 1 );\n\t\tzAxis.setFromMatrix3Column( this, 2 );\n\n\t\treturn this;\n\n\t}\n\n\tsetFromMatrix4( m ) {\n\n\t\tconst me = m.elements;\n\n\t\tthis.set(\n\n\t\t\tme[ 0 ], me[ 4 ], me[ 8 ],\n\t\t\tme[ 1 ], me[ 5 ], me[ 9 ],\n\t\t\tme[ 2 ], me[ 6 ], me[ 10 ]\n\n\t\t);\n\n\t\treturn this;\n\n\t}\n\n\tmultiply( m ) {\n\n\t\treturn this.multiplyMatrices( this, m );\n\n\t}\n\n\tpremultiply( m ) {\n\n\t\treturn this.multiplyMatrices( m, this );\n\n\t}\n\n\tmultiplyMatrices( a, b ) {\n\n\t\tconst ae = a.elements;\n\t\tconst be = b.elements;\n\t\tconst te = this.elements;\n\n\t\tconst a11 = ae[ 0 ], a12 = ae[ 3 ], a13 = ae[ 6 ];\n\t\tconst a21 = ae[ 1 ], a22 = ae[ 4 ], a23 = ae[ 7 ];\n\t\tconst a31 = ae[ 2 ], a32 = ae[ 5 ], a33 = ae[ 8 ];\n\n\t\tconst b11 = be[ 0 ], b12 = be[ 3 ], b13 = be[ 6 ];\n\t\tconst b21 = be[ 1 ], b22 = be[ 4 ], b23 = be[ 7 ];\n\t\tconst b31 = be[ 2 ], b32 = be[ 5 ], b33 = be[ 8 ];\n\n\t\tte[ 0 ] = a11 * b11 + a12 * b21 + a13 * b31;\n\t\tte[ 3 ] = a11 * b12 + a12 * b22 + a13 * b32;\n\t\tte[ 6 ] = a11 * b13 + a12 * b23 + a13 * b33;\n\n\t\tte[ 1 ] = a21 * b11 + a22 * b21 + a23 * b31;\n\t\tte[ 4 ] = a21 * b12 + a22 * b22 + a23 * b32;\n\t\tte[ 7 ] = a21 * b13 + a22 * b23 + a23 * b33;\n\n\t\tte[ 2 ] = a31 * b11 + a32 * b21 + a33 * b31;\n\t\tte[ 5 ] = a31 * b12 + a32 * b22 + a33 * b32;\n\t\tte[ 8 ] = a31 * b13 + a32 * b23 + a33 * b33;\n\n\t\treturn this;\n\n\t}\n\n\tmultiplyScalar( s ) {\n\n\t\tconst te = this.elements;\n\n\t\tte[ 0 ] *= s; te[ 3 ] *= s; te[ 6 ] *= s;\n\t\tte[ 1 ] *= s; te[ 4 ] *= s; te[ 7 ] *= s;\n\t\tte[ 2 ] *= s; te[ 5 ] *= s; te[ 8 ] *= s;\n\n\t\treturn this;\n\n\t}\n\n\tdeterminant() {\n\n\t\tconst te = this.elements;\n\n\t\tconst a = te[ 0 ], b = te[ 1 ], c = te[ 2 ],\n\t\t\td = te[ 3 ], e = te[ 4 ], f = te[ 5 ],\n\t\t\tg = te[ 6 ], h = te[ 7 ], i = te[ 8 ];\n\n\t\treturn a * e * i - a * f * h - b * d * i + b * f * g + c * d * h - c * e * g;\n\n\t}\n\n\tinvert() {\n\n\t\tconst te = this.elements,\n\n\t\t\tn11 = te[ 0 ], n21 = te[ 1 ], n31 = te[ 2 ],\n\t\t\tn12 = te[ 3 ], n22 = te[ 4 ], n32 = te[ 5 ],\n\t\t\tn13 = te[ 6 ], n23 = te[ 7 ], n33 = te[ 8 ],\n\n\t\t\tt11 = n33 * n22 - n32 * n23,\n\t\t\tt12 = n32 * n13 - n33 * n12,\n\t\t\tt13 = n23 * n12 - n22 * n13,\n\n\t\t\tdet = n11 * t11 + n21 * t12 + n31 * t13;\n\n\t\tif ( det === 0 ) return this.set( 0, 0, 0, 0, 0, 0, 0, 0, 0 );\n\n\t\tconst detInv = 1 / det;\n\n\t\tte[ 0 ] = t11 * detInv;\n\t\tte[ 1 ] = ( n31 * n23 - n33 * n21 ) * detInv;\n\t\tte[ 2 ] = ( n32 * n21 - n31 * n22 ) * detInv;\n\n\t\tte[ 3 ] = t12 * detInv;\n\t\tte[ 4 ] = ( n33 * n11 - n31 * n13 ) * detInv;\n\t\tte[ 5 ] = ( n31 * n12 - n32 * n11 ) * detInv;\n\n\t\tte[ 6 ] = t13 * detInv;\n\t\tte[ 7 ] = ( n21 * n13 - n23 * n11 ) * detInv;\n\t\tte[ 8 ] = ( n22 * n11 - n21 * n12 ) * detInv;\n\n\t\treturn this;\n\n\t}\n\n\ttranspose() {\n\n\t\tlet tmp;\n\t\tconst m = this.elements;\n\n\t\ttmp = m[ 1 ]; m[ 1 ] = m[ 3 ]; m[ 3 ] = tmp;\n\t\ttmp = m[ 2 ]; m[ 2 ] = m[ 6 ]; m[ 6 ] = tmp;\n\t\ttmp = m[ 5 ]; m[ 5 ] = m[ 7 ]; m[ 7 ] = tmp;\n\n\t\treturn this;\n\n\t}\n\n\tgetNormalMatrix( matrix4 ) {\n\n\t\treturn this.setFromMatrix4( matrix4 ).copy( this ).invert().transpose();\n\n\t}\n\n\ttransposeIntoArray( r ) {\n\n\t\tconst m = this.elements;\n\n\t\tr[ 0 ] = m[ 0 ];\n\t\tr[ 1 ] = m[ 3 ];\n\t\tr[ 2 ] = m[ 6 ];\n\t\tr[ 3 ] = m[ 1 ];\n\t\tr[ 4 ] = m[ 4 ];\n\t\tr[ 5 ] = m[ 7 ];\n\t\tr[ 6 ] = m[ 2 ];\n\t\tr[ 7 ] = m[ 5 ];\n\t\tr[ 8 ] = m[ 8 ];\n\n\t\treturn this;\n\n\t}\n\n\tsetUvTransform( tx, ty, sx, sy, rotation, cx, cy ) {\n\n\t\tconst c = Math.cos( rotation );\n\t\tconst s = Math.sin( rotation );\n\n\t\tthis.set(\n\t\t\tsx * c, sx * s, - sx * ( c * cx + s * cy ) + cx + tx,\n\t\t\t- sy * s, sy * c, - sy * ( - s * cx + c * cy ) + cy + ty,\n\t\t\t0, 0, 1\n\t\t);\n\n\t\treturn this;\n\n\t}\n\n\tscale( sx, sy ) {\n\n\t\tconst te = this.elements;\n\n\t\tte[ 0 ] *= sx; te[ 3 ] *= sx; te[ 6 ] *= sx;\n\t\tte[ 1 ] *= sy; te[ 4 ] *= sy; te[ 7 ] *= sy;\n\n\t\treturn this;\n\n\t}\n\n\trotate( theta ) {\n\n\t\tconst c = Math.cos( theta );\n\t\tconst s = Math.sin( theta );\n\n\t\tconst te = this.elements;\n\n\t\tconst a11 = te[ 0 ], a12 = te[ 3 ], a13 = te[ 6 ];\n\t\tconst a21 = te[ 1 ], a22 = te[ 4 ], a23 = te[ 7 ];\n\n\t\tte[ 0 ] = c * a11 + s * a21;\n\t\tte[ 3 ] = c * a12 + s * a22;\n\t\tte[ 6 ] = c * a13 + s * a23;\n\n\t\tte[ 1 ] = - s * a11 + c * a21;\n\t\tte[ 4 ] = - s * a12 + c * a22;\n\t\tte[ 7 ] = - s * a13 + c * a23;\n\n\t\treturn this;\n\n\t}\n\n\ttranslate( tx, ty ) {\n\n\t\tconst te = this.elements;\n\n\t\tte[ 0 ] += tx * te[ 2 ]; te[ 3 ] += tx * te[ 5 ]; te[ 6 ] += tx * te[ 8 ];\n\t\tte[ 1 ] += ty * te[ 2 ]; te[ 4 ] += ty * te[ 5 ]; te[ 7 ] += ty * te[ 8 ];\n\n\t\treturn this;\n\n\t}\n\n\tequals( matrix ) {\n\n\t\tconst te = this.elements;\n\t\tconst me = matrix.elements;\n\n\t\tfor ( let i = 0; i < 9; i ++ ) {\n\n\t\t\tif ( te[ i ] !== me[ i ] ) return false;\n\n\t\t}\n\n\t\treturn true;\n\n\t}\n\n\tfromArray( array, offset = 0 ) {\n\n\t\tfor ( let i = 0; i < 9; i ++ ) {\n\n\t\t\tthis.elements[ i ] = array[ i + offset ];\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n\ttoArray( array = [], offset = 0 ) {\n\n\t\tconst te = this.elements;\n\n\t\tarray[ offset ] = te[ 0 ];\n\t\tarray[ offset + 1 ] = te[ 1 ];\n\t\tarray[ offset + 2 ] = te[ 2 ];\n\n\t\tarray[ offset + 3 ] = te[ 3 ];\n\t\tarray[ offset + 4 ] = te[ 4 ];\n\t\tarray[ offset + 5 ] = te[ 5 ];\n\n\t\tarray[ offset + 6 ] = te[ 6 ];\n\t\tarray[ offset + 7 ] = te[ 7 ];\n\t\tarray[ offset + 8 ] = te[ 8 ];\n\n\t\treturn array;\n\n\t}\n\n}\n\nlet _canvas;\n\nconst ImageUtils = {\n\n\tgetDataURL: function ( image ) {\n\n\t\tif ( /^data:/i.test( image.src ) ) {\n\n\t\t\treturn image.src;\n\n\t\t}\n\n\t\tif ( typeof HTMLCanvasElement == 'undefined' ) {\n\n\t\t\treturn image.src;\n\n\t\t}\n\n\t\tlet canvas;\n\n\t\tif ( image instanceof HTMLCanvasElement ) {\n\n\t\t\tcanvas = image;\n\n\t\t} else {\n\n\t\t\tif ( _canvas === undefined ) _canvas = document.createElementNS( 'http://www.w3.org/1999/xhtml', 'canvas' );\n\n\t\t\t_canvas.width = image.width;\n\t\t\t_canvas.height = image.height;\n\n\t\t\tconst context = _canvas.getContext( '2d' );\n\n\t\t\tif ( image instanceof ImageData ) {\n\n\t\t\t\tcontext.putImageData( image, 0, 0 );\n\n\t\t\t} else {\n\n\t\t\t\tcontext.drawImage( image, 0, 0, image.width, image.height );\n\n\t\t\t}\n\n\t\t\tcanvas = _canvas;\n\n\t\t}\n\n\t\tif ( canvas.width > 2048 || canvas.height > 2048 ) {\n\n\t\t\treturn canvas.toDataURL( 'image/jpeg', 0.6 );\n\n\t\t} else {\n\n\t\t\treturn canvas.toDataURL( 'image/png' );\n\n\t\t}\n\n\t}\n\n};\n\nlet textureId = 0;\n\nfunction Texture( image = Texture.DEFAULT_IMAGE, mapping = Texture.DEFAULT_MAPPING, wrapS = ClampToEdgeWrapping, wrapT = ClampToEdgeWrapping, magFilter = LinearFilter, minFilter = LinearMipmapLinearFilter, format = RGBAFormat, type = UnsignedByteType, anisotropy = 1, encoding = LinearEncoding ) {\n\n\tObject.defineProperty( this, 'id', { value: textureId ++ } );\n\n\tthis.uuid = MathUtils.generateUUID();\n\n\tthis.name = '';\n\n\tthis.image = image;\n\tthis.mipmaps = [];\n\n\tthis.mapping = mapping;\n\n\tthis.wrapS = wrapS;\n\tthis.wrapT = wrapT;\n\n\tthis.magFilter = magFilter;\n\tthis.minFilter = minFilter;\n\n\tthis.anisotropy = anisotropy;\n\n\tthis.format = format;\n\tthis.internalFormat = null;\n\tthis.type = type;\n\n\tthis.offset = new Vector2( 0, 0 );\n\tthis.repeat = new Vector2( 1, 1 );\n\tthis.center = new Vector2( 0, 0 );\n\tthis.rotation = 0;\n\n\tthis.matrixAutoUpdate = true;\n\tthis.matrix = new Matrix3();\n\n\tthis.generateMipmaps = true;\n\tthis.premultiplyAlpha = false;\n\tthis.flipY = true;\n\tthis.unpackAlignment = 4;\t// valid values: 1, 2, 4, 8 (see http://www.khronos.org/opengles/sdk/docs/man/xhtml/glPixelStorei.xml)\n\n\t// Values of encoding !== THREE.LinearEncoding only supported on map, envMap and emissiveMap.\n\t//\n\t// Also changing the encoding after already used by a Material will not automatically make the Material\n\t// update. You need to explicitly call Material.needsUpdate to trigger it to recompile.\n\tthis.encoding = encoding;\n\n\tthis.version = 0;\n\tthis.onUpdate = null;\n\n}\n\nTexture.DEFAULT_IMAGE = undefined;\nTexture.DEFAULT_MAPPING = UVMapping;\n\nTexture.prototype = Object.assign( Object.create( EventDispatcher.prototype ), {\n\n\tconstructor: Texture,\n\n\tisTexture: true,\n\n\tupdateMatrix: function () {\n\n\t\tthis.matrix.setUvTransform( this.offset.x, this.offset.y, this.repeat.x, this.repeat.y, this.rotation, this.center.x, this.center.y );\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor().copy( this );\n\n\t},\n\n\tcopy: function ( source ) {\n\n\t\tthis.name = source.name;\n\n\t\tthis.image = source.image;\n\t\tthis.mipmaps = source.mipmaps.slice( 0 );\n\n\t\tthis.mapping = source.mapping;\n\n\t\tthis.wrapS = source.wrapS;\n\t\tthis.wrapT = source.wrapT;\n\n\t\tthis.magFilter = source.magFilter;\n\t\tthis.minFilter = source.minFilter;\n\n\t\tthis.anisotropy = source.anisotropy;\n\n\t\tthis.format = source.format;\n\t\tthis.internalFormat = source.internalFormat;\n\t\tthis.type = source.type;\n\n\t\tthis.offset.copy( source.offset );\n\t\tthis.repeat.copy( source.repeat );\n\t\tthis.center.copy( source.center );\n\t\tthis.rotation = source.rotation;\n\n\t\tthis.matrixAutoUpdate = source.matrixAutoUpdate;\n\t\tthis.matrix.copy( source.matrix );\n\n\t\tthis.generateMipmaps = source.generateMipmaps;\n\t\tthis.premultiplyAlpha = source.premultiplyAlpha;\n\t\tthis.flipY = source.flipY;\n\t\tthis.unpackAlignment = source.unpackAlignment;\n\t\tthis.encoding = source.encoding;\n\n\t\treturn this;\n\n\t},\n\n\ttoJSON: function ( meta ) {\n\n\t\tconst isRootObject = ( meta === undefined || typeof meta === 'string' );\n\n\t\tif ( ! isRootObject && meta.textures[ this.uuid ] !== undefined ) {\n\n\t\t\treturn meta.textures[ this.uuid ];\n\n\t\t}\n\n\t\tconst output = {\n\n\t\t\tmetadata: {\n\t\t\t\tversion: 4.5,\n\t\t\t\ttype: 'Texture',\n\t\t\t\tgenerator: 'Texture.toJSON'\n\t\t\t},\n\n\t\t\tuuid: this.uuid,\n\t\t\tname: this.name,\n\n\t\t\tmapping: this.mapping,\n\n\t\t\trepeat: [ this.repeat.x, this.repeat.y ],\n\t\t\toffset: [ this.offset.x, this.offset.y ],\n\t\t\tcenter: [ this.center.x, this.center.y ],\n\t\t\trotation: this.rotation,\n\n\t\t\twrap: [ this.wrapS, this.wrapT ],\n\n\t\t\tformat: this.format,\n\t\t\ttype: this.type,\n\t\t\tencoding: this.encoding,\n\n\t\t\tminFilter: this.minFilter,\n\t\t\tmagFilter: this.magFilter,\n\t\t\tanisotropy: this.anisotropy,\n\n\t\t\tflipY: this.flipY,\n\n\t\t\tpremultiplyAlpha: this.premultiplyAlpha,\n\t\t\tunpackAlignment: this.unpackAlignment\n\n\t\t};\n\n\t\tif ( this.image !== undefined ) {\n\n\t\t\t// TODO: Move to THREE.Image\n\n\t\t\tconst image = this.image;\n\n\t\t\tif ( image.uuid === undefined ) {\n\n\t\t\t\timage.uuid = MathUtils.generateUUID(); // UGH\n\n\t\t\t}\n\n\t\t\tif ( ! isRootObject && meta.images[ image.uuid ] === undefined ) {\n\n\t\t\t\tlet url;\n\n\t\t\t\tif ( Array.isArray( image ) ) {\n\n\t\t\t\t\t// process array of images e.g. CubeTexture\n\n\t\t\t\t\turl = [];\n\n\t\t\t\t\tfor ( let i = 0, l = image.length; i < l; i ++ ) {\n\n\t\t\t\t\t\t// check cube texture with data textures\n\n\t\t\t\t\t\tif ( image[ i ].isDataTexture ) {\n\n\t\t\t\t\t\t\turl.push( serializeImage( image[ i ].image ) );\n\n\t\t\t\t\t\t} else {\n\n\t\t\t\t\t\t\turl.push( serializeImage( image[ i ] ) );\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t} else {\n\n\t\t\t\t\t// process single image\n\n\t\t\t\t\turl = serializeImage( image );\n\n\t\t\t\t}\n\n\t\t\t\tmeta.images[ image.uuid ] = {\n\t\t\t\t\tuuid: image.uuid,\n\t\t\t\t\turl: url\n\t\t\t\t};\n\n\t\t\t}\n\n\t\t\toutput.image = image.uuid;\n\n\t\t}\n\n\t\tif ( ! isRootObject ) {\n\n\t\t\tmeta.textures[ this.uuid ] = output;\n\n\t\t}\n\n\t\treturn output;\n\n\t},\n\n\tdispose: function () {\n\n\t\tthis.dispatchEvent( { type: 'dispose' } );\n\n\t},\n\n\ttransformUv: function ( uv ) {\n\n\t\tif ( this.mapping !== UVMapping ) return uv;\n\n\t\tuv.applyMatrix3( this.matrix );\n\n\t\tif ( uv.x < 0 || uv.x > 1 ) {\n\n\t\t\tswitch ( this.wrapS ) {\n\n\t\t\t\tcase RepeatWrapping:\n\n\t\t\t\t\tuv.x = uv.x - Math.floor( uv.x );\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase ClampToEdgeWrapping:\n\n\t\t\t\t\tuv.x = uv.x < 0 ? 0 : 1;\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase MirroredRepeatWrapping:\n\n\t\t\t\t\tif ( Math.abs( Math.floor( uv.x ) % 2 ) === 1 ) {\n\n\t\t\t\t\t\tuv.x = Math.ceil( uv.x ) - uv.x;\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\tuv.x = uv.x - Math.floor( uv.x );\n\n\t\t\t\t\t}\n\n\t\t\t\t\tbreak;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( uv.y < 0 || uv.y > 1 ) {\n\n\t\t\tswitch ( this.wrapT ) {\n\n\t\t\t\tcase RepeatWrapping:\n\n\t\t\t\t\tuv.y = uv.y - Math.floor( uv.y );\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase ClampToEdgeWrapping:\n\n\t\t\t\t\tuv.y = uv.y < 0 ? 0 : 1;\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase MirroredRepeatWrapping:\n\n\t\t\t\t\tif ( Math.abs( Math.floor( uv.y ) % 2 ) === 1 ) {\n\n\t\t\t\t\t\tuv.y = Math.ceil( uv.y ) - uv.y;\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\tuv.y = uv.y - Math.floor( uv.y );\n\n\t\t\t\t\t}\n\n\t\t\t\t\tbreak;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( this.flipY ) {\n\n\t\t\tuv.y = 1 - uv.y;\n\n\t\t}\n\n\t\treturn uv;\n\n\t}\n\n} );\n\nObject.defineProperty( Texture.prototype, 'needsUpdate', {\n\n\tset: function ( value ) {\n\n\t\tif ( value === true ) this.version ++;\n\n\t}\n\n} );\n\nfunction serializeImage( image ) {\n\n\tif ( ( typeof HTMLImageElement !== 'undefined' && image instanceof HTMLImageElement ) ||\n\t\t( typeof HTMLCanvasElement !== 'undefined' && image instanceof HTMLCanvasElement ) ||\n\t\t( typeof ImageBitmap !== 'undefined' && image instanceof ImageBitmap ) ) {\n\n\t\t// default images\n\n\t\treturn ImageUtils.getDataURL( image );\n\n\t} else {\n\n\t\tif ( image.data ) {\n\n\t\t\t// images of DataTexture\n\n\t\t\treturn {\n\t\t\t\tdata: Array.prototype.slice.call( image.data ),\n\t\t\t\twidth: image.width,\n\t\t\t\theight: image.height,\n\t\t\t\ttype: image.data.constructor.name\n\t\t\t};\n\n\t\t} else {\n\n\t\t\tconsole.warn( 'THREE.Texture: Unable to serialize Texture.' );\n\t\t\treturn {};\n\n\t\t}\n\n\t}\n\n}\n\nclass Vector4 {\n\n\tconstructor( x = 0, y = 0, z = 0, w = 1 ) {\n\n\t\tObject.defineProperty( this, 'isVector4', { value: true } );\n\n\t\tthis.x = x;\n\t\tthis.y = y;\n\t\tthis.z = z;\n\t\tthis.w = w;\n\n\t}\n\n\tget width() {\n\n\t\treturn this.z;\n\n\t}\n\n\tset width( value ) {\n\n\t\tthis.z = value;\n\n\t}\n\n\tget height() {\n\n\t\treturn this.w;\n\n\t}\n\n\tset height( value ) {\n\n\t\tthis.w = value;\n\n\t}\n\n\tset( x, y, z, w ) {\n\n\t\tthis.x = x;\n\t\tthis.y = y;\n\t\tthis.z = z;\n\t\tthis.w = w;\n\n\t\treturn this;\n\n\t}\n\n\tsetScalar( scalar ) {\n\n\t\tthis.x = scalar;\n\t\tthis.y = scalar;\n\t\tthis.z = scalar;\n\t\tthis.w = scalar;\n\n\t\treturn this;\n\n\t}\n\n\tsetX( x ) {\n\n\t\tthis.x = x;\n\n\t\treturn this;\n\n\t}\n\n\tsetY( y ) {\n\n\t\tthis.y = y;\n\n\t\treturn this;\n\n\t}\n\n\tsetZ( z ) {\n\n\t\tthis.z = z;\n\n\t\treturn this;\n\n\t}\n\n\tsetW( w ) {\n\n\t\tthis.w = w;\n\n\t\treturn this;\n\n\t}\n\n\tsetComponent( index, value ) {\n\n\t\tswitch ( index ) {\n\n\t\t\tcase 0: this.x = value; break;\n\t\t\tcase 1: this.y = value; break;\n\t\t\tcase 2: this.z = value; break;\n\t\t\tcase 3: this.w = value; break;\n\t\t\tdefault: throw new Error( 'index is out of range: ' + index );\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n\tgetComponent( index ) {\n\n\t\tswitch ( index ) {\n\n\t\t\tcase 0: return this.x;\n\t\t\tcase 1: return this.y;\n\t\t\tcase 2: return this.z;\n\t\t\tcase 3: return this.w;\n\t\t\tdefault: throw new Error( 'index is out of range: ' + index );\n\n\t\t}\n\n\t}\n\n\tclone() {\n\n\t\treturn new this.constructor( this.x, this.y, this.z, this.w );\n\n\t}\n\n\tcopy( v ) {\n\n\t\tthis.x = v.x;\n\t\tthis.y = v.y;\n\t\tthis.z = v.z;\n\t\tthis.w = ( v.w !== undefined ) ? v.w : 1;\n\n\t\treturn this;\n\n\t}\n\n\tadd( v, w ) {\n\n\t\tif ( w !== undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Vector4: .add() now only accepts one argument. Use .addVectors( a, b ) instead.' );\n\t\t\treturn this.addVectors( v, w );\n\n\t\t}\n\n\t\tthis.x += v.x;\n\t\tthis.y += v.y;\n\t\tthis.z += v.z;\n\t\tthis.w += v.w;\n\n\t\treturn this;\n\n\t}\n\n\taddScalar( s ) {\n\n\t\tthis.x += s;\n\t\tthis.y += s;\n\t\tthis.z += s;\n\t\tthis.w += s;\n\n\t\treturn this;\n\n\t}\n\n\taddVectors( a, b ) {\n\n\t\tthis.x = a.x + b.x;\n\t\tthis.y = a.y + b.y;\n\t\tthis.z = a.z + b.z;\n\t\tthis.w = a.w + b.w;\n\n\t\treturn this;\n\n\t}\n\n\taddScaledVector( v, s ) {\n\n\t\tthis.x += v.x * s;\n\t\tthis.y += v.y * s;\n\t\tthis.z += v.z * s;\n\t\tthis.w += v.w * s;\n\n\t\treturn this;\n\n\t}\n\n\tsub( v, w ) {\n\n\t\tif ( w !== undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Vector4: .sub() now only accepts one argument. Use .subVectors( a, b ) instead.' );\n\t\t\treturn this.subVectors( v, w );\n\n\t\t}\n\n\t\tthis.x -= v.x;\n\t\tthis.y -= v.y;\n\t\tthis.z -= v.z;\n\t\tthis.w -= v.w;\n\n\t\treturn this;\n\n\t}\n\n\tsubScalar( s ) {\n\n\t\tthis.x -= s;\n\t\tthis.y -= s;\n\t\tthis.z -= s;\n\t\tthis.w -= s;\n\n\t\treturn this;\n\n\t}\n\n\tsubVectors( a, b ) {\n\n\t\tthis.x = a.x - b.x;\n\t\tthis.y = a.y - b.y;\n\t\tthis.z = a.z - b.z;\n\t\tthis.w = a.w - b.w;\n\n\t\treturn this;\n\n\t}\n\n\tmultiply( v ) {\n\n\t\tthis.x *= v.x;\n\t\tthis.y *= v.y;\n\t\tthis.z *= v.z;\n\t\tthis.w *= v.w;\n\n\t\treturn this;\n\n\t}\n\n\tmultiplyScalar( scalar ) {\n\n\t\tthis.x *= scalar;\n\t\tthis.y *= scalar;\n\t\tthis.z *= scalar;\n\t\tthis.w *= scalar;\n\n\t\treturn this;\n\n\t}\n\n\tapplyMatrix4( m ) {\n\n\t\tconst x = this.x, y = this.y, z = this.z, w = this.w;\n\t\tconst e = m.elements;\n\n\t\tthis.x = e[ 0 ] * x + e[ 4 ] * y + e[ 8 ] * z + e[ 12 ] * w;\n\t\tthis.y = e[ 1 ] * x + e[ 5 ] * y + e[ 9 ] * z + e[ 13 ] * w;\n\t\tthis.z = e[ 2 ] * x + e[ 6 ] * y + e[ 10 ] * z + e[ 14 ] * w;\n\t\tthis.w = e[ 3 ] * x + e[ 7 ] * y + e[ 11 ] * z + e[ 15 ] * w;\n\n\t\treturn this;\n\n\t}\n\n\tdivideScalar( scalar ) {\n\n\t\treturn this.multiplyScalar( 1 / scalar );\n\n\t}\n\n\tsetAxisAngleFromQuaternion( q ) {\n\n\t\t// http://www.euclideanspace.com/maths/geometry/rotations/conversions/quaternionToAngle/index.htm\n\n\t\t// q is assumed to be normalized\n\n\t\tthis.w = 2 * Math.acos( q.w );\n\n\t\tconst s = Math.sqrt( 1 - q.w * q.w );\n\n\t\tif ( s < 0.0001 ) {\n\n\t\t\tthis.x = 1;\n\t\t\tthis.y = 0;\n\t\t\tthis.z = 0;\n\n\t\t} else {\n\n\t\t\tthis.x = q.x / s;\n\t\t\tthis.y = q.y / s;\n\t\t\tthis.z = q.z / s;\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n\tsetAxisAngleFromRotationMatrix( m ) {\n\n\t\t// http://www.euclideanspace.com/maths/geometry/rotations/conversions/matrixToAngle/index.htm\n\n\t\t// assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)\n\n\t\tlet angle, x, y, z; // variables for result\n\t\tconst epsilon = 0.01,\t\t// margin to allow for rounding errors\n\t\t\tepsilon2 = 0.1,\t\t// margin to distinguish between 0 and 180 degrees\n\n\t\t\tte = m.elements,\n\n\t\t\tm11 = te[ 0 ], m12 = te[ 4 ], m13 = te[ 8 ],\n\t\t\tm21 = te[ 1 ], m22 = te[ 5 ], m23 = te[ 9 ],\n\t\t\tm31 = te[ 2 ], m32 = te[ 6 ], m33 = te[ 10 ];\n\n\t\tif ( ( Math.abs( m12 - m21 ) < epsilon ) &&\n\t\t     ( Math.abs( m13 - m31 ) < epsilon ) &&\n\t\t     ( Math.abs( m23 - m32 ) < epsilon ) ) {\n\n\t\t\t// singularity found\n\t\t\t// first check for identity matrix which must have +1 for all terms\n\t\t\t// in leading diagonal and zero in other terms\n\n\t\t\tif ( ( Math.abs( m12 + m21 ) < epsilon2 ) &&\n\t\t\t     ( Math.abs( m13 + m31 ) < epsilon2 ) &&\n\t\t\t     ( Math.abs( m23 + m32 ) < epsilon2 ) &&\n\t\t\t     ( Math.abs( m11 + m22 + m33 - 3 ) < epsilon2 ) ) {\n\n\t\t\t\t// this singularity is identity matrix so angle = 0\n\n\t\t\t\tthis.set( 1, 0, 0, 0 );\n\n\t\t\t\treturn this; // zero angle, arbitrary axis\n\n\t\t\t}\n\n\t\t\t// otherwise this singularity is angle = 180\n\n\t\t\tangle = Math.PI;\n\n\t\t\tconst xx = ( m11 + 1 ) / 2;\n\t\t\tconst yy = ( m22 + 1 ) / 2;\n\t\t\tconst zz = ( m33 + 1 ) / 2;\n\t\t\tconst xy = ( m12 + m21 ) / 4;\n\t\t\tconst xz = ( m13 + m31 ) / 4;\n\t\t\tconst yz = ( m23 + m32 ) / 4;\n\n\t\t\tif ( ( xx > yy ) && ( xx > zz ) ) {\n\n\t\t\t\t// m11 is the largest diagonal term\n\n\t\t\t\tif ( xx < epsilon ) {\n\n\t\t\t\t\tx = 0;\n\t\t\t\t\ty = 0.707106781;\n\t\t\t\t\tz = 0.707106781;\n\n\t\t\t\t} else {\n\n\t\t\t\t\tx = Math.sqrt( xx );\n\t\t\t\t\ty = xy / x;\n\t\t\t\t\tz = xz / x;\n\n\t\t\t\t}\n\n\t\t\t} else if ( yy > zz ) {\n\n\t\t\t\t// m22 is the largest diagonal term\n\n\t\t\t\tif ( yy < epsilon ) {\n\n\t\t\t\t\tx = 0.707106781;\n\t\t\t\t\ty = 0;\n\t\t\t\t\tz = 0.707106781;\n\n\t\t\t\t} else {\n\n\t\t\t\t\ty = Math.sqrt( yy );\n\t\t\t\t\tx = xy / y;\n\t\t\t\t\tz = yz / y;\n\n\t\t\t\t}\n\n\t\t\t} else {\n\n\t\t\t\t// m33 is the largest diagonal term so base result on this\n\n\t\t\t\tif ( zz < epsilon ) {\n\n\t\t\t\t\tx = 0.707106781;\n\t\t\t\t\ty = 0.707106781;\n\t\t\t\t\tz = 0;\n\n\t\t\t\t} else {\n\n\t\t\t\t\tz = Math.sqrt( zz );\n\t\t\t\t\tx = xz / z;\n\t\t\t\t\ty = yz / z;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tthis.set( x, y, z, angle );\n\n\t\t\treturn this; // return 180 deg rotation\n\n\t\t}\n\n\t\t// as we have reached here there are no singularities so we can handle normally\n\n\t\tlet s = Math.sqrt( ( m32 - m23 ) * ( m32 - m23 ) +\n\t\t\t( m13 - m31 ) * ( m13 - m31 ) +\n\t\t\t( m21 - m12 ) * ( m21 - m12 ) ); // used to normalize\n\n\t\tif ( Math.abs( s ) < 0.001 ) s = 1;\n\n\t\t// prevent divide by zero, should not happen if matrix is orthogonal and should be\n\t\t// caught by singularity test above, but I've left it in just in case\n\n\t\tthis.x = ( m32 - m23 ) / s;\n\t\tthis.y = ( m13 - m31 ) / s;\n\t\tthis.z = ( m21 - m12 ) / s;\n\t\tthis.w = Math.acos( ( m11 + m22 + m33 - 1 ) / 2 );\n\n\t\treturn this;\n\n\t}\n\n\tmin( v ) {\n\n\t\tthis.x = Math.min( this.x, v.x );\n\t\tthis.y = Math.min( this.y, v.y );\n\t\tthis.z = Math.min( this.z, v.z );\n\t\tthis.w = Math.min( this.w, v.w );\n\n\t\treturn this;\n\n\t}\n\n\tmax( v ) {\n\n\t\tthis.x = Math.max( this.x, v.x );\n\t\tthis.y = Math.max( this.y, v.y );\n\t\tthis.z = Math.max( this.z, v.z );\n\t\tthis.w = Math.max( this.w, v.w );\n\n\t\treturn this;\n\n\t}\n\n\tclamp( min, max ) {\n\n\t\t// assumes min < max, componentwise\n\n\t\tthis.x = Math.max( min.x, Math.min( max.x, this.x ) );\n\t\tthis.y = Math.max( min.y, Math.min( max.y, this.y ) );\n\t\tthis.z = Math.max( min.z, Math.min( max.z, this.z ) );\n\t\tthis.w = Math.max( min.w, Math.min( max.w, this.w ) );\n\n\t\treturn this;\n\n\t}\n\n\tclampScalar( minVal, maxVal ) {\n\n\t\tthis.x = Math.max( minVal, Math.min( maxVal, this.x ) );\n\t\tthis.y = Math.max( minVal, Math.min( maxVal, this.y ) );\n\t\tthis.z = Math.max( minVal, Math.min( maxVal, this.z ) );\n\t\tthis.w = Math.max( minVal, Math.min( maxVal, this.w ) );\n\n\t\treturn this;\n\n\t}\n\n\tclampLength( min, max ) {\n\n\t\tconst length = this.length();\n\n\t\treturn this.divideScalar( length || 1 ).multiplyScalar( Math.max( min, Math.min( max, length ) ) );\n\n\t}\n\n\tfloor() {\n\n\t\tthis.x = Math.floor( this.x );\n\t\tthis.y = Math.floor( this.y );\n\t\tthis.z = Math.floor( this.z );\n\t\tthis.w = Math.floor( this.w );\n\n\t\treturn this;\n\n\t}\n\n\tceil() {\n\n\t\tthis.x = Math.ceil( this.x );\n\t\tthis.y = Math.ceil( this.y );\n\t\tthis.z = Math.ceil( this.z );\n\t\tthis.w = Math.ceil( this.w );\n\n\t\treturn this;\n\n\t}\n\n\tround() {\n\n\t\tthis.x = Math.round( this.x );\n\t\tthis.y = Math.round( this.y );\n\t\tthis.z = Math.round( this.z );\n\t\tthis.w = Math.round( this.w );\n\n\t\treturn this;\n\n\t}\n\n\troundToZero() {\n\n\t\tthis.x = ( this.x < 0 ) ? Math.ceil( this.x ) : Math.floor( this.x );\n\t\tthis.y = ( this.y < 0 ) ? Math.ceil( this.y ) : Math.floor( this.y );\n\t\tthis.z = ( this.z < 0 ) ? Math.ceil( this.z ) : Math.floor( this.z );\n\t\tthis.w = ( this.w < 0 ) ? Math.ceil( this.w ) : Math.floor( this.w );\n\n\t\treturn this;\n\n\t}\n\n\tnegate() {\n\n\t\tthis.x = - this.x;\n\t\tthis.y = - this.y;\n\t\tthis.z = - this.z;\n\t\tthis.w = - this.w;\n\n\t\treturn this;\n\n\t}\n\n\tdot( v ) {\n\n\t\treturn this.x * v.x + this.y * v.y + this.z * v.z + this.w * v.w;\n\n\t}\n\n\tlengthSq() {\n\n\t\treturn this.x * this.x + this.y * this.y + this.z * this.z + this.w * this.w;\n\n\t}\n\n\tlength() {\n\n\t\treturn Math.sqrt( this.x * this.x + this.y * this.y + this.z * this.z + this.w * this.w );\n\n\t}\n\n\tmanhattanLength() {\n\n\t\treturn Math.abs( this.x ) + Math.abs( this.y ) + Math.abs( this.z ) + Math.abs( this.w );\n\n\t}\n\n\tnormalize() {\n\n\t\treturn this.divideScalar( this.length() || 1 );\n\n\t}\n\n\tsetLength( length ) {\n\n\t\treturn this.normalize().multiplyScalar( length );\n\n\t}\n\n\tlerp( v, alpha ) {\n\n\t\tthis.x += ( v.x - this.x ) * alpha;\n\t\tthis.y += ( v.y - this.y ) * alpha;\n\t\tthis.z += ( v.z - this.z ) * alpha;\n\t\tthis.w += ( v.w - this.w ) * alpha;\n\n\t\treturn this;\n\n\t}\n\n\tlerpVectors( v1, v2, alpha ) {\n\n\t\tthis.x = v1.x + ( v2.x - v1.x ) * alpha;\n\t\tthis.y = v1.y + ( v2.y - v1.y ) * alpha;\n\t\tthis.z = v1.z + ( v2.z - v1.z ) * alpha;\n\t\tthis.w = v1.w + ( v2.w - v1.w ) * alpha;\n\n\t\treturn this;\n\n\t}\n\n\tequals( v ) {\n\n\t\treturn ( ( v.x === this.x ) && ( v.y === this.y ) && ( v.z === this.z ) && ( v.w === this.w ) );\n\n\t}\n\n\tfromArray( array, offset = 0 ) {\n\n\t\tthis.x = array[ offset ];\n\t\tthis.y = array[ offset + 1 ];\n\t\tthis.z = array[ offset + 2 ];\n\t\tthis.w = array[ offset + 3 ];\n\n\t\treturn this;\n\n\t}\n\n\ttoArray( array = [], offset = 0 ) {\n\n\t\tarray[ offset ] = this.x;\n\t\tarray[ offset + 1 ] = this.y;\n\t\tarray[ offset + 2 ] = this.z;\n\t\tarray[ offset + 3 ] = this.w;\n\n\t\treturn array;\n\n\t}\n\n\tfromBufferAttribute( attribute, index, offset ) {\n\n\t\tif ( offset !== undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Vector4: offset has been removed from .fromBufferAttribute().' );\n\n\t\t}\n\n\t\tthis.x = attribute.getX( index );\n\t\tthis.y = attribute.getY( index );\n\t\tthis.z = attribute.getZ( index );\n\t\tthis.w = attribute.getW( index );\n\n\t\treturn this;\n\n\t}\n\n\trandom() {\n\n\t\tthis.x = Math.random();\n\t\tthis.y = Math.random();\n\t\tthis.z = Math.random();\n\t\tthis.w = Math.random();\n\n\t\treturn this;\n\n\t}\n\n}\n\n/*\n In options, we can specify:\n * Texture parameters for an auto-generated target texture\n * depthBuffer/stencilBuffer: Booleans to indicate if we should generate these buffers\n*/\nclass WebGLRenderTarget extends EventDispatcher {\n\n\tconstructor( width, height, options ) {\n\n\t\tsuper();\n\n\t\tObject.defineProperty( this, 'isWebGLRenderTarget', { value: true } );\n\n\t\tthis.width = width;\n\t\tthis.height = height;\n\n\t\tthis.scissor = new Vector4( 0, 0, width, height );\n\t\tthis.scissorTest = false;\n\n\t\tthis.viewport = new Vector4( 0, 0, width, height );\n\n\t\toptions = options || {};\n\n\t\tthis.texture = new Texture( undefined, options.mapping, options.wrapS, options.wrapT, options.magFilter, options.minFilter, options.format, options.type, options.anisotropy, options.encoding );\n\n\t\tthis.texture.image = {};\n\t\tthis.texture.image.width = width;\n\t\tthis.texture.image.height = height;\n\n\t\tthis.texture.generateMipmaps = options.generateMipmaps !== undefined ? options.generateMipmaps : false;\n\t\tthis.texture.minFilter = options.minFilter !== undefined ? options.minFilter : LinearFilter;\n\n\t\tthis.depthBuffer = options.depthBuffer !== undefined ? options.depthBuffer : true;\n\t\tthis.stencilBuffer = options.stencilBuffer !== undefined ? options.stencilBuffer : false;\n\t\tthis.depthTexture = options.depthTexture !== undefined ? options.depthTexture : null;\n\n\t}\n\n\tsetSize( width, height ) {\n\n\t\tif ( this.width !== width || this.height !== height ) {\n\n\t\t\tthis.width = width;\n\t\t\tthis.height = height;\n\n\t\t\tthis.texture.image.width = width;\n\t\t\tthis.texture.image.height = height;\n\n\t\t\tthis.dispose();\n\n\t\t}\n\n\t\tthis.viewport.set( 0, 0, width, height );\n\t\tthis.scissor.set( 0, 0, width, height );\n\n\t}\n\n\tclone() {\n\n\t\treturn new this.constructor().copy( this );\n\n\t}\n\n\tcopy( source ) {\n\n\t\tthis.width = source.width;\n\t\tthis.height = source.height;\n\n\t\tthis.viewport.copy( source.viewport );\n\n\t\tthis.texture = source.texture.clone();\n\n\t\tthis.depthBuffer = source.depthBuffer;\n\t\tthis.stencilBuffer = source.stencilBuffer;\n\t\tthis.depthTexture = source.depthTexture;\n\n\t\treturn this;\n\n\t}\n\n\tdispose() {\n\n\t\tthis.dispatchEvent( { type: 'dispose' } );\n\n\t}\n\n}\n\nclass WebGLMultisampleRenderTarget extends WebGLRenderTarget {\n\n\tconstructor( width, height, options ) {\n\n\t\tsuper( width, height, options );\n\n\t\tObject.defineProperty( this, 'isWebGLMultisampleRenderTarget', { value: true } );\n\n\t\tthis.samples = 4;\n\n\t}\n\n\tcopy( source ) {\n\n\t\tsuper.copy.call( this, source );\n\n\t\tthis.samples = source.samples;\n\n\t\treturn this;\n\n\t}\n\n}\n\nclass Quaternion {\n\n\tconstructor( x = 0, y = 0, z = 0, w = 1 ) {\n\n\t\tObject.defineProperty( this, 'isQuaternion', { value: true } );\n\n\t\tthis._x = x;\n\t\tthis._y = y;\n\t\tthis._z = z;\n\t\tthis._w = w;\n\n\t}\n\n\tstatic slerp( qa, qb, qm, t ) {\n\n\t\treturn qm.copy( qa ).slerp( qb, t );\n\n\t}\n\n\tstatic slerpFlat( dst, dstOffset, src0, srcOffset0, src1, srcOffset1, t ) {\n\n\t\t// fuzz-free, array-based Quaternion SLERP operation\n\n\t\tlet x0 = src0[ srcOffset0 + 0 ],\n\t\t\ty0 = src0[ srcOffset0 + 1 ],\n\t\t\tz0 = src0[ srcOffset0 + 2 ],\n\t\t\tw0 = src0[ srcOffset0 + 3 ];\n\n\t\tconst x1 = src1[ srcOffset1 + 0 ],\n\t\t\ty1 = src1[ srcOffset1 + 1 ],\n\t\t\tz1 = src1[ srcOffset1 + 2 ],\n\t\t\tw1 = src1[ srcOffset1 + 3 ];\n\n\t\tif ( w0 !== w1 || x0 !== x1 || y0 !== y1 || z0 !== z1 ) {\n\n\t\t\tlet s = 1 - t;\n\t\t\tconst cos = x0 * x1 + y0 * y1 + z0 * z1 + w0 * w1,\n\t\t\t\tdir = ( cos >= 0 ? 1 : - 1 ),\n\t\t\t\tsqrSin = 1 - cos * cos;\n\n\t\t\t// Skip the Slerp for tiny steps to avoid numeric problems:\n\t\t\tif ( sqrSin > Number.EPSILON ) {\n\n\t\t\t\tconst sin = Math.sqrt( sqrSin ),\n\t\t\t\t\tlen = Math.atan2( sin, cos * dir );\n\n\t\t\t\ts = Math.sin( s * len ) / sin;\n\t\t\t\tt = Math.sin( t * len ) / sin;\n\n\t\t\t}\n\n\t\t\tconst tDir = t * dir;\n\n\t\t\tx0 = x0 * s + x1 * tDir;\n\t\t\ty0 = y0 * s + y1 * tDir;\n\t\t\tz0 = z0 * s + z1 * tDir;\n\t\t\tw0 = w0 * s + w1 * tDir;\n\n\t\t\t// Normalize in case we just did a lerp:\n\t\t\tif ( s === 1 - t ) {\n\n\t\t\t\tconst f = 1 / Math.sqrt( x0 * x0 + y0 * y0 + z0 * z0 + w0 * w0 );\n\n\t\t\t\tx0 *= f;\n\t\t\t\ty0 *= f;\n\t\t\t\tz0 *= f;\n\t\t\t\tw0 *= f;\n\n\t\t\t}\n\n\t\t}\n\n\t\tdst[ dstOffset ] = x0;\n\t\tdst[ dstOffset + 1 ] = y0;\n\t\tdst[ dstOffset + 2 ] = z0;\n\t\tdst[ dstOffset + 3 ] = w0;\n\n\t}\n\n\tstatic multiplyQuaternionsFlat( dst, dstOffset, src0, srcOffset0, src1, srcOffset1 ) {\n\n\t\tconst x0 = src0[ srcOffset0 ];\n\t\tconst y0 = src0[ srcOffset0 + 1 ];\n\t\tconst z0 = src0[ srcOffset0 + 2 ];\n\t\tconst w0 = src0[ srcOffset0 + 3 ];\n\n\t\tconst x1 = src1[ srcOffset1 ];\n\t\tconst y1 = src1[ srcOffset1 + 1 ];\n\t\tconst z1 = src1[ srcOffset1 + 2 ];\n\t\tconst w1 = src1[ srcOffset1 + 3 ];\n\n\t\tdst[ dstOffset ] = x0 * w1 + w0 * x1 + y0 * z1 - z0 * y1;\n\t\tdst[ dstOffset + 1 ] = y0 * w1 + w0 * y1 + z0 * x1 - x0 * z1;\n\t\tdst[ dstOffset + 2 ] = z0 * w1 + w0 * z1 + x0 * y1 - y0 * x1;\n\t\tdst[ dstOffset + 3 ] = w0 * w1 - x0 * x1 - y0 * y1 - z0 * z1;\n\n\t\treturn dst;\n\n\t}\n\n\tget x() {\n\n\t\treturn this._x;\n\n\t}\n\n\tset x( value ) {\n\n\t\tthis._x = value;\n\t\tthis._onChangeCallback();\n\n\t}\n\n\tget y() {\n\n\t\treturn this._y;\n\n\t}\n\n\tset y( value ) {\n\n\t\tthis._y = value;\n\t\tthis._onChangeCallback();\n\n\t}\n\n\tget z() {\n\n\t\treturn this._z;\n\n\t}\n\n\tset z( value ) {\n\n\t\tthis._z = value;\n\t\tthis._onChangeCallback();\n\n\t}\n\n\tget w() {\n\n\t\treturn this._w;\n\n\t}\n\n\tset w( value ) {\n\n\t\tthis._w = value;\n\t\tthis._onChangeCallback();\n\n\t}\n\n\tset( x, y, z, w ) {\n\n\t\tthis._x = x;\n\t\tthis._y = y;\n\t\tthis._z = z;\n\t\tthis._w = w;\n\n\t\tthis._onChangeCallback();\n\n\t\treturn this;\n\n\t}\n\n\tclone() {\n\n\t\treturn new this.constructor( this._x, this._y, this._z, this._w );\n\n\t}\n\n\tcopy( quaternion ) {\n\n\t\tthis._x = quaternion.x;\n\t\tthis._y = quaternion.y;\n\t\tthis._z = quaternion.z;\n\t\tthis._w = quaternion.w;\n\n\t\tthis._onChangeCallback();\n\n\t\treturn this;\n\n\t}\n\n\tsetFromEuler( euler, update ) {\n\n\t\tif ( ! ( euler && euler.isEuler ) ) {\n\n\t\t\tthrow new Error( 'THREE.Quaternion: .setFromEuler() now expects an Euler rotation rather than a Vector3 and order.' );\n\n\t\t}\n\n\t\tconst x = euler._x, y = euler._y, z = euler._z, order = euler._order;\n\n\t\t// http://www.mathworks.com/matlabcentral/fileexchange/\n\t\t// \t20696-function-to-convert-between-dcm-euler-angles-quaternions-and-euler-vectors/\n\t\t//\tcontent/SpinCalc.m\n\n\t\tconst cos = Math.cos;\n\t\tconst sin = Math.sin;\n\n\t\tconst c1 = cos( x / 2 );\n\t\tconst c2 = cos( y / 2 );\n\t\tconst c3 = cos( z / 2 );\n\n\t\tconst s1 = sin( x / 2 );\n\t\tconst s2 = sin( y / 2 );\n\t\tconst s3 = sin( z / 2 );\n\n\t\tswitch ( order ) {\n\n\t\t\tcase 'XYZ':\n\t\t\t\tthis._x = s1 * c2 * c3 + c1 * s2 * s3;\n\t\t\t\tthis._y = c1 * s2 * c3 - s1 * c2 * s3;\n\t\t\t\tthis._z = c1 * c2 * s3 + s1 * s2 * c3;\n\t\t\t\tthis._w = c1 * c2 * c3 - s1 * s2 * s3;\n\t\t\t\tbreak;\n\n\t\t\tcase 'YXZ':\n\t\t\t\tthis._x = s1 * c2 * c3 + c1 * s2 * s3;\n\t\t\t\tthis._y = c1 * s2 * c3 - s1 * c2 * s3;\n\t\t\t\tthis._z = c1 * c2 * s3 - s1 * s2 * c3;\n\t\t\t\tthis._w = c1 * c2 * c3 + s1 * s2 * s3;\n\t\t\t\tbreak;\n\n\t\t\tcase 'ZXY':\n\t\t\t\tthis._x = s1 * c2 * c3 - c1 * s2 * s3;\n\t\t\t\tthis._y = c1 * s2 * c3 + s1 * c2 * s3;\n\t\t\t\tthis._z = c1 * c2 * s3 + s1 * s2 * c3;\n\t\t\t\tthis._w = c1 * c2 * c3 - s1 * s2 * s3;\n\t\t\t\tbreak;\n\n\t\t\tcase 'ZYX':\n\t\t\t\tthis._x = s1 * c2 * c3 - c1 * s2 * s3;\n\t\t\t\tthis._y = c1 * s2 * c3 + s1 * c2 * s3;\n\t\t\t\tthis._z = c1 * c2 * s3 - s1 * s2 * c3;\n\t\t\t\tthis._w = c1 * c2 * c3 + s1 * s2 * s3;\n\t\t\t\tbreak;\n\n\t\t\tcase 'YZX':\n\t\t\t\tthis._x = s1 * c2 * c3 + c1 * s2 * s3;\n\t\t\t\tthis._y = c1 * s2 * c3 + s1 * c2 * s3;\n\t\t\t\tthis._z = c1 * c2 * s3 - s1 * s2 * c3;\n\t\t\t\tthis._w = c1 * c2 * c3 - s1 * s2 * s3;\n\t\t\t\tbreak;\n\n\t\t\tcase 'XZY':\n\t\t\t\tthis._x = s1 * c2 * c3 - c1 * s2 * s3;\n\t\t\t\tthis._y = c1 * s2 * c3 - s1 * c2 * s3;\n\t\t\t\tthis._z = c1 * c2 * s3 + s1 * s2 * c3;\n\t\t\t\tthis._w = c1 * c2 * c3 + s1 * s2 * s3;\n\t\t\t\tbreak;\n\n\t\t\tdefault:\n\t\t\t\tconsole.warn( 'THREE.Quaternion: .setFromEuler() encountered an unknown order: ' + order );\n\n\t\t}\n\n\t\tif ( update !== false ) this._onChangeCallback();\n\n\t\treturn this;\n\n\t}\n\n\tsetFromAxisAngle( axis, angle ) {\n\n\t\t// http://www.euclideanspace.com/maths/geometry/rotations/conversions/angleToQuaternion/index.htm\n\n\t\t// assumes axis is normalized\n\n\t\tconst halfAngle = angle / 2, s = Math.sin( halfAngle );\n\n\t\tthis._x = axis.x * s;\n\t\tthis._y = axis.y * s;\n\t\tthis._z = axis.z * s;\n\t\tthis._w = Math.cos( halfAngle );\n\n\t\tthis._onChangeCallback();\n\n\t\treturn this;\n\n\t}\n\n\tsetFromRotationMatrix( m ) {\n\n\t\t// http://www.euclideanspace.com/maths/geometry/rotations/conversions/matrixToQuaternion/index.htm\n\n\t\t// assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)\n\n\t\tconst te = m.elements,\n\n\t\t\tm11 = te[ 0 ], m12 = te[ 4 ], m13 = te[ 8 ],\n\t\t\tm21 = te[ 1 ], m22 = te[ 5 ], m23 = te[ 9 ],\n\t\t\tm31 = te[ 2 ], m32 = te[ 6 ], m33 = te[ 10 ],\n\n\t\t\ttrace = m11 + m22 + m33;\n\n\t\tif ( trace > 0 ) {\n\n\t\t\tconst s = 0.5 / Math.sqrt( trace + 1.0 );\n\n\t\t\tthis._w = 0.25 / s;\n\t\t\tthis._x = ( m32 - m23 ) * s;\n\t\t\tthis._y = ( m13 - m31 ) * s;\n\t\t\tthis._z = ( m21 - m12 ) * s;\n\n\t\t} else if ( m11 > m22 && m11 > m33 ) {\n\n\t\t\tconst s = 2.0 * Math.sqrt( 1.0 + m11 - m22 - m33 );\n\n\t\t\tthis._w = ( m32 - m23 ) / s;\n\t\t\tthis._x = 0.25 * s;\n\t\t\tthis._y = ( m12 + m21 ) / s;\n\t\t\tthis._z = ( m13 + m31 ) / s;\n\n\t\t} else if ( m22 > m33 ) {\n\n\t\t\tconst s = 2.0 * Math.sqrt( 1.0 + m22 - m11 - m33 );\n\n\t\t\tthis._w = ( m13 - m31 ) / s;\n\t\t\tthis._x = ( m12 + m21 ) / s;\n\t\t\tthis._y = 0.25 * s;\n\t\t\tthis._z = ( m23 + m32 ) / s;\n\n\t\t} else {\n\n\t\t\tconst s = 2.0 * Math.sqrt( 1.0 + m33 - m11 - m22 );\n\n\t\t\tthis._w = ( m21 - m12 ) / s;\n\t\t\tthis._x = ( m13 + m31 ) / s;\n\t\t\tthis._y = ( m23 + m32 ) / s;\n\t\t\tthis._z = 0.25 * s;\n\n\t\t}\n\n\t\tthis._onChangeCallback();\n\n\t\treturn this;\n\n\t}\n\n\tsetFromUnitVectors( vFrom, vTo ) {\n\n\t\t// assumes direction vectors vFrom and vTo are normalized\n\n\t\tconst EPS = 0.000001;\n\n\t\tlet r = vFrom.dot( vTo ) + 1;\n\n\t\tif ( r < EPS ) {\n\n\t\t\tr = 0;\n\n\t\t\tif ( Math.abs( vFrom.x ) > Math.abs( vFrom.z ) ) {\n\n\t\t\t\tthis._x = - vFrom.y;\n\t\t\t\tthis._y = vFrom.x;\n\t\t\t\tthis._z = 0;\n\t\t\t\tthis._w = r;\n\n\t\t\t} else {\n\n\t\t\t\tthis._x = 0;\n\t\t\t\tthis._y = - vFrom.z;\n\t\t\t\tthis._z = vFrom.y;\n\t\t\t\tthis._w = r;\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\t// crossVectors( vFrom, vTo ); // inlined to avoid cyclic dependency on Vector3\n\n\t\t\tthis._x = vFrom.y * vTo.z - vFrom.z * vTo.y;\n\t\t\tthis._y = vFrom.z * vTo.x - vFrom.x * vTo.z;\n\t\t\tthis._z = vFrom.x * vTo.y - vFrom.y * vTo.x;\n\t\t\tthis._w = r;\n\n\t\t}\n\n\t\treturn this.normalize();\n\n\t}\n\n\tangleTo( q ) {\n\n\t\treturn 2 * Math.acos( Math.abs( MathUtils.clamp( this.dot( q ), - 1, 1 ) ) );\n\n\t}\n\n\trotateTowards( q, step ) {\n\n\t\tconst angle = this.angleTo( q );\n\n\t\tif ( angle === 0 ) return this;\n\n\t\tconst t = Math.min( 1, step / angle );\n\n\t\tthis.slerp( q, t );\n\n\t\treturn this;\n\n\t}\n\n\tidentity() {\n\n\t\treturn this.set( 0, 0, 0, 1 );\n\n\t}\n\n\tinvert() {\n\n\t\t// quaternion is assumed to have unit length\n\n\t\treturn this.conjugate();\n\n\t}\n\n\tconjugate() {\n\n\t\tthis._x *= - 1;\n\t\tthis._y *= - 1;\n\t\tthis._z *= - 1;\n\n\t\tthis._onChangeCallback();\n\n\t\treturn this;\n\n\t}\n\n\tdot( v ) {\n\n\t\treturn this._x * v._x + this._y * v._y + this._z * v._z + this._w * v._w;\n\n\t}\n\n\tlengthSq() {\n\n\t\treturn this._x * this._x + this._y * this._y + this._z * this._z + this._w * this._w;\n\n\t}\n\n\tlength() {\n\n\t\treturn Math.sqrt( this._x * this._x + this._y * this._y + this._z * this._z + this._w * this._w );\n\n\t}\n\n\tnormalize() {\n\n\t\tlet l = this.length();\n\n\t\tif ( l === 0 ) {\n\n\t\t\tthis._x = 0;\n\t\t\tthis._y = 0;\n\t\t\tthis._z = 0;\n\t\t\tthis._w = 1;\n\n\t\t} else {\n\n\t\t\tl = 1 / l;\n\n\t\t\tthis._x = this._x * l;\n\t\t\tthis._y = this._y * l;\n\t\t\tthis._z = this._z * l;\n\t\t\tthis._w = this._w * l;\n\n\t\t}\n\n\t\tthis._onChangeCallback();\n\n\t\treturn this;\n\n\t}\n\n\tmultiply( q, p ) {\n\n\t\tif ( p !== undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Quaternion: .multiply() now only accepts one argument. Use .multiplyQuaternions( a, b ) instead.' );\n\t\t\treturn this.multiplyQuaternions( q, p );\n\n\t\t}\n\n\t\treturn this.multiplyQuaternions( this, q );\n\n\t}\n\n\tpremultiply( q ) {\n\n\t\treturn this.multiplyQuaternions( q, this );\n\n\t}\n\n\tmultiplyQuaternions( a, b ) {\n\n\t\t// from http://www.euclideanspace.com/maths/algebra/realNormedAlgebra/quaternions/code/index.htm\n\n\t\tconst qax = a._x, qay = a._y, qaz = a._z, qaw = a._w;\n\t\tconst qbx = b._x, qby = b._y, qbz = b._z, qbw = b._w;\n\n\t\tthis._x = qax * qbw + qaw * qbx + qay * qbz - qaz * qby;\n\t\tthis._y = qay * qbw + qaw * qby + qaz * qbx - qax * qbz;\n\t\tthis._z = qaz * qbw + qaw * qbz + qax * qby - qay * qbx;\n\t\tthis._w = qaw * qbw - qax * qbx - qay * qby - qaz * qbz;\n\n\t\tthis._onChangeCallback();\n\n\t\treturn this;\n\n\t}\n\n\tslerp( qb, t ) {\n\n\t\tif ( t === 0 ) return this;\n\t\tif ( t === 1 ) return this.copy( qb );\n\n\t\tconst x = this._x, y = this._y, z = this._z, w = this._w;\n\n\t\t// http://www.euclideanspace.com/maths/algebra/realNormedAlgebra/quaternions/slerp/\n\n\t\tlet cosHalfTheta = w * qb._w + x * qb._x + y * qb._y + z * qb._z;\n\n\t\tif ( cosHalfTheta < 0 ) {\n\n\t\t\tthis._w = - qb._w;\n\t\t\tthis._x = - qb._x;\n\t\t\tthis._y = - qb._y;\n\t\t\tthis._z = - qb._z;\n\n\t\t\tcosHalfTheta = - cosHalfTheta;\n\n\t\t} else {\n\n\t\t\tthis.copy( qb );\n\n\t\t}\n\n\t\tif ( cosHalfTheta >= 1.0 ) {\n\n\t\t\tthis._w = w;\n\t\t\tthis._x = x;\n\t\t\tthis._y = y;\n\t\t\tthis._z = z;\n\n\t\t\treturn this;\n\n\t\t}\n\n\t\tconst sqrSinHalfTheta = 1.0 - cosHalfTheta * cosHalfTheta;\n\n\t\tif ( sqrSinHalfTheta <= Number.EPSILON ) {\n\n\t\t\tconst s = 1 - t;\n\t\t\tthis._w = s * w + t * this._w;\n\t\t\tthis._x = s * x + t * this._x;\n\t\t\tthis._y = s * y + t * this._y;\n\t\t\tthis._z = s * z + t * this._z;\n\n\t\t\tthis.normalize();\n\t\t\tthis._onChangeCallback();\n\n\t\t\treturn this;\n\n\t\t}\n\n\t\tconst sinHalfTheta = Math.sqrt( sqrSinHalfTheta );\n\t\tconst halfTheta = Math.atan2( sinHalfTheta, cosHalfTheta );\n\t\tconst ratioA = Math.sin( ( 1 - t ) * halfTheta ) / sinHalfTheta,\n\t\t\tratioB = Math.sin( t * halfTheta ) / sinHalfTheta;\n\n\t\tthis._w = ( w * ratioA + this._w * ratioB );\n\t\tthis._x = ( x * ratioA + this._x * ratioB );\n\t\tthis._y = ( y * ratioA + this._y * ratioB );\n\t\tthis._z = ( z * ratioA + this._z * ratioB );\n\n\t\tthis._onChangeCallback();\n\n\t\treturn this;\n\n\t}\n\n\tequals( quaternion ) {\n\n\t\treturn ( quaternion._x === this._x ) && ( quaternion._y === this._y ) && ( quaternion._z === this._z ) && ( quaternion._w === this._w );\n\n\t}\n\n\tfromArray( array, offset = 0 ) {\n\n\t\tthis._x = array[ offset ];\n\t\tthis._y = array[ offset + 1 ];\n\t\tthis._z = array[ offset + 2 ];\n\t\tthis._w = array[ offset + 3 ];\n\n\t\tthis._onChangeCallback();\n\n\t\treturn this;\n\n\t}\n\n\ttoArray( array = [], offset = 0 ) {\n\n\t\tarray[ offset ] = this._x;\n\t\tarray[ offset + 1 ] = this._y;\n\t\tarray[ offset + 2 ] = this._z;\n\t\tarray[ offset + 3 ] = this._w;\n\n\t\treturn array;\n\n\t}\n\n\tfromBufferAttribute( attribute, index ) {\n\n\t\tthis._x = attribute.getX( index );\n\t\tthis._y = attribute.getY( index );\n\t\tthis._z = attribute.getZ( index );\n\t\tthis._w = attribute.getW( index );\n\n\t\treturn this;\n\n\t}\n\n\t_onChange( callback ) {\n\n\t\tthis._onChangeCallback = callback;\n\n\t\treturn this;\n\n\t}\n\n\t_onChangeCallback() {}\n\n}\n\nclass Vector3 {\n\n\tconstructor( x = 0, y = 0, z = 0 ) {\n\n\t\tObject.defineProperty( this, 'isVector3', { value: true } );\n\n\t\tthis.x = x;\n\t\tthis.y = y;\n\t\tthis.z = z;\n\n\t}\n\n\tset( x, y, z ) {\n\n\t\tif ( z === undefined ) z = this.z; // sprite.scale.set(x,y)\n\n\t\tthis.x = x;\n\t\tthis.y = y;\n\t\tthis.z = z;\n\n\t\treturn this;\n\n\t}\n\n\tsetScalar( scalar ) {\n\n\t\tthis.x = scalar;\n\t\tthis.y = scalar;\n\t\tthis.z = scalar;\n\n\t\treturn this;\n\n\t}\n\n\tsetX( x ) {\n\n\t\tthis.x = x;\n\n\t\treturn this;\n\n\t}\n\n\tsetY( y ) {\n\n\t\tthis.y = y;\n\n\t\treturn this;\n\n\t}\n\n\tsetZ( z ) {\n\n\t\tthis.z = z;\n\n\t\treturn this;\n\n\t}\n\n\tsetComponent( index, value ) {\n\n\t\tswitch ( index ) {\n\n\t\t\tcase 0: this.x = value; break;\n\t\t\tcase 1: this.y = value; break;\n\t\t\tcase 2: this.z = value; break;\n\t\t\tdefault: throw new Error( 'index is out of range: ' + index );\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n\tgetComponent( index ) {\n\n\t\tswitch ( index ) {\n\n\t\t\tcase 0: return this.x;\n\t\t\tcase 1: return this.y;\n\t\t\tcase 2: return this.z;\n\t\t\tdefault: throw new Error( 'index is out of range: ' + index );\n\n\t\t}\n\n\t}\n\n\tclone() {\n\n\t\treturn new this.constructor( this.x, this.y, this.z );\n\n\t}\n\n\tcopy( v ) {\n\n\t\tthis.x = v.x;\n\t\tthis.y = v.y;\n\t\tthis.z = v.z;\n\n\t\treturn this;\n\n\t}\n\n\tadd( v, w ) {\n\n\t\tif ( w !== undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Vector3: .add() now only accepts one argument. Use .addVectors( a, b ) instead.' );\n\t\t\treturn this.addVectors( v, w );\n\n\t\t}\n\n\t\tthis.x += v.x;\n\t\tthis.y += v.y;\n\t\tthis.z += v.z;\n\n\t\treturn this;\n\n\t}\n\n\taddScalar( s ) {\n\n\t\tthis.x += s;\n\t\tthis.y += s;\n\t\tthis.z += s;\n\n\t\treturn this;\n\n\t}\n\n\taddVectors( a, b ) {\n\n\t\tthis.x = a.x + b.x;\n\t\tthis.y = a.y + b.y;\n\t\tthis.z = a.z + b.z;\n\n\t\treturn this;\n\n\t}\n\n\taddScaledVector( v, s ) {\n\n\t\tthis.x += v.x * s;\n\t\tthis.y += v.y * s;\n\t\tthis.z += v.z * s;\n\n\t\treturn this;\n\n\t}\n\n\tsub( v, w ) {\n\n\t\tif ( w !== undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Vector3: .sub() now only accepts one argument. Use .subVectors( a, b ) instead.' );\n\t\t\treturn this.subVectors( v, w );\n\n\t\t}\n\n\t\tthis.x -= v.x;\n\t\tthis.y -= v.y;\n\t\tthis.z -= v.z;\n\n\t\treturn this;\n\n\t}\n\n\tsubScalar( s ) {\n\n\t\tthis.x -= s;\n\t\tthis.y -= s;\n\t\tthis.z -= s;\n\n\t\treturn this;\n\n\t}\n\n\tsubVectors( a, b ) {\n\n\t\tthis.x = a.x - b.x;\n\t\tthis.y = a.y - b.y;\n\t\tthis.z = a.z - b.z;\n\n\t\treturn this;\n\n\t}\n\n\tmultiply( v, w ) {\n\n\t\tif ( w !== undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Vector3: .multiply() now only accepts one argument. Use .multiplyVectors( a, b ) instead.' );\n\t\t\treturn this.multiplyVectors( v, w );\n\n\t\t}\n\n\t\tthis.x *= v.x;\n\t\tthis.y *= v.y;\n\t\tthis.z *= v.z;\n\n\t\treturn this;\n\n\t}\n\n\tmultiplyScalar( scalar ) {\n\n\t\tthis.x *= scalar;\n\t\tthis.y *= scalar;\n\t\tthis.z *= scalar;\n\n\t\treturn this;\n\n\t}\n\n\tmultiplyVectors( a, b ) {\n\n\t\tthis.x = a.x * b.x;\n\t\tthis.y = a.y * b.y;\n\t\tthis.z = a.z * b.z;\n\n\t\treturn this;\n\n\t}\n\n\tapplyEuler( euler ) {\n\n\t\tif ( ! ( euler && euler.isEuler ) ) {\n\n\t\t\tconsole.error( 'THREE.Vector3: .applyEuler() now expects an Euler rotation rather than a Vector3 and order.' );\n\n\t\t}\n\n\t\treturn this.applyQuaternion( _quaternion.setFromEuler( euler ) );\n\n\t}\n\n\tapplyAxisAngle( axis, angle ) {\n\n\t\treturn this.applyQuaternion( _quaternion.setFromAxisAngle( axis, angle ) );\n\n\t}\n\n\tapplyMatrix3( m ) {\n\n\t\tconst x = this.x, y = this.y, z = this.z;\n\t\tconst e = m.elements;\n\n\t\tthis.x = e[ 0 ] * x + e[ 3 ] * y + e[ 6 ] * z;\n\t\tthis.y = e[ 1 ] * x + e[ 4 ] * y + e[ 7 ] * z;\n\t\tthis.z = e[ 2 ] * x + e[ 5 ] * y + e[ 8 ] * z;\n\n\t\treturn this;\n\n\t}\n\n\tapplyNormalMatrix( m ) {\n\n\t\treturn this.applyMatrix3( m ).normalize();\n\n\t}\n\n\tapplyMatrix4( m ) {\n\n\t\tconst x = this.x, y = this.y, z = this.z;\n\t\tconst e = m.elements;\n\n\t\tconst w = 1 / ( e[ 3 ] * x + e[ 7 ] * y + e[ 11 ] * z + e[ 15 ] );\n\n\t\tthis.x = ( e[ 0 ] * x + e[ 4 ] * y + e[ 8 ] * z + e[ 12 ] ) * w;\n\t\tthis.y = ( e[ 1 ] * x + e[ 5 ] * y + e[ 9 ] * z + e[ 13 ] ) * w;\n\t\tthis.z = ( e[ 2 ] * x + e[ 6 ] * y + e[ 10 ] * z + e[ 14 ] ) * w;\n\n\t\treturn this;\n\n\t}\n\n\tapplyQuaternion( q ) {\n\n\t\tconst x = this.x, y = this.y, z = this.z;\n\t\tconst qx = q.x, qy = q.y, qz = q.z, qw = q.w;\n\n\t\t// calculate quat * vector\n\n\t\tconst ix = qw * x + qy * z - qz * y;\n\t\tconst iy = qw * y + qz * x - qx * z;\n\t\tconst iz = qw * z + qx * y - qy * x;\n\t\tconst iw = - qx * x - qy * y - qz * z;\n\n\t\t// calculate result * inverse quat\n\n\t\tthis.x = ix * qw + iw * - qx + iy * - qz - iz * - qy;\n\t\tthis.y = iy * qw + iw * - qy + iz * - qx - ix * - qz;\n\t\tthis.z = iz * qw + iw * - qz + ix * - qy - iy * - qx;\n\n\t\treturn this;\n\n\t}\n\n\tproject( camera ) {\n\n\t\treturn this.applyMatrix4( camera.matrixWorldInverse ).applyMatrix4( camera.projectionMatrix );\n\n\t}\n\n\tunproject( camera ) {\n\n\t\treturn this.applyMatrix4( camera.projectionMatrixInverse ).applyMatrix4( camera.matrixWorld );\n\n\t}\n\n\ttransformDirection( m ) {\n\n\t\t// input: THREE.Matrix4 affine matrix\n\t\t// vector interpreted as a direction\n\n\t\tconst x = this.x, y = this.y, z = this.z;\n\t\tconst e = m.elements;\n\n\t\tthis.x = e[ 0 ] * x + e[ 4 ] * y + e[ 8 ] * z;\n\t\tthis.y = e[ 1 ] * x + e[ 5 ] * y + e[ 9 ] * z;\n\t\tthis.z = e[ 2 ] * x + e[ 6 ] * y + e[ 10 ] * z;\n\n\t\treturn this.normalize();\n\n\t}\n\n\tdivide( v ) {\n\n\t\tthis.x /= v.x;\n\t\tthis.y /= v.y;\n\t\tthis.z /= v.z;\n\n\t\treturn this;\n\n\t}\n\n\tdivideScalar( scalar ) {\n\n\t\treturn this.multiplyScalar( 1 / scalar );\n\n\t}\n\n\tmin( v ) {\n\n\t\tthis.x = Math.min( this.x, v.x );\n\t\tthis.y = Math.min( this.y, v.y );\n\t\tthis.z = Math.min( this.z, v.z );\n\n\t\treturn this;\n\n\t}\n\n\tmax( v ) {\n\n\t\tthis.x = Math.max( this.x, v.x );\n\t\tthis.y = Math.max( this.y, v.y );\n\t\tthis.z = Math.max( this.z, v.z );\n\n\t\treturn this;\n\n\t}\n\n\tclamp( min, max ) {\n\n\t\t// assumes min < max, componentwise\n\n\t\tthis.x = Math.max( min.x, Math.min( max.x, this.x ) );\n\t\tthis.y = Math.max( min.y, Math.min( max.y, this.y ) );\n\t\tthis.z = Math.max( min.z, Math.min( max.z, this.z ) );\n\n\t\treturn this;\n\n\t}\n\n\tclampScalar( minVal, maxVal ) {\n\n\t\tthis.x = Math.max( minVal, Math.min( maxVal, this.x ) );\n\t\tthis.y = Math.max( minVal, Math.min( maxVal, this.y ) );\n\t\tthis.z = Math.max( minVal, Math.min( maxVal, this.z ) );\n\n\t\treturn this;\n\n\t}\n\n\tclampLength( min, max ) {\n\n\t\tconst length = this.length();\n\n\t\treturn this.divideScalar( length || 1 ).multiplyScalar( Math.max( min, Math.min( max, length ) ) );\n\n\t}\n\n\tfloor() {\n\n\t\tthis.x = Math.floor( this.x );\n\t\tthis.y = Math.floor( this.y );\n\t\tthis.z = Math.floor( this.z );\n\n\t\treturn this;\n\n\t}\n\n\tceil() {\n\n\t\tthis.x = Math.ceil( this.x );\n\t\tthis.y = Math.ceil( this.y );\n\t\tthis.z = Math.ceil( this.z );\n\n\t\treturn this;\n\n\t}\n\n\tround() {\n\n\t\tthis.x = Math.round( this.x );\n\t\tthis.y = Math.round( this.y );\n\t\tthis.z = Math.round( this.z );\n\n\t\treturn this;\n\n\t}\n\n\troundToZero() {\n\n\t\tthis.x = ( this.x < 0 ) ? Math.ceil( this.x ) : Math.floor( this.x );\n\t\tthis.y = ( this.y < 0 ) ? Math.ceil( this.y ) : Math.floor( this.y );\n\t\tthis.z = ( this.z < 0 ) ? Math.ceil( this.z ) : Math.floor( this.z );\n\n\t\treturn this;\n\n\t}\n\n\tnegate() {\n\n\t\tthis.x = - this.x;\n\t\tthis.y = - this.y;\n\t\tthis.z = - this.z;\n\n\t\treturn this;\n\n\t}\n\n\tdot( v ) {\n\n\t\treturn this.x * v.x + this.y * v.y + this.z * v.z;\n\n\t}\n\n\t// TODO lengthSquared?\n\n\tlengthSq() {\n\n\t\treturn this.x * this.x + this.y * this.y + this.z * this.z;\n\n\t}\n\n\tlength() {\n\n\t\treturn Math.sqrt( this.x * this.x + this.y * this.y + this.z * this.z );\n\n\t}\n\n\tmanhattanLength() {\n\n\t\treturn Math.abs( this.x ) + Math.abs( this.y ) + Math.abs( this.z );\n\n\t}\n\n\tnormalize() {\n\n\t\treturn this.divideScalar( this.length() || 1 );\n\n\t}\n\n\tsetLength( length ) {\n\n\t\treturn this.normalize().multiplyScalar( length );\n\n\t}\n\n\tlerp( v, alpha ) {\n\n\t\tthis.x += ( v.x - this.x ) * alpha;\n\t\tthis.y += ( v.y - this.y ) * alpha;\n\t\tthis.z += ( v.z - this.z ) * alpha;\n\n\t\treturn this;\n\n\t}\n\n\tlerpVectors( v1, v2, alpha ) {\n\n\t\tthis.x = v1.x + ( v2.x - v1.x ) * alpha;\n\t\tthis.y = v1.y + ( v2.y - v1.y ) * alpha;\n\t\tthis.z = v1.z + ( v2.z - v1.z ) * alpha;\n\n\t\treturn this;\n\n\t}\n\n\tcross( v, w ) {\n\n\t\tif ( w !== undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Vector3: .cross() now only accepts one argument. Use .crossVectors( a, b ) instead.' );\n\t\t\treturn this.crossVectors( v, w );\n\n\t\t}\n\n\t\treturn this.crossVectors( this, v );\n\n\t}\n\n\tcrossVectors( a, b ) {\n\n\t\tconst ax = a.x, ay = a.y, az = a.z;\n\t\tconst bx = b.x, by = b.y, bz = b.z;\n\n\t\tthis.x = ay * bz - az * by;\n\t\tthis.y = az * bx - ax * bz;\n\t\tthis.z = ax * by - ay * bx;\n\n\t\treturn this;\n\n\t}\n\n\tprojectOnVector( v ) {\n\n\t\tconst denominator = v.lengthSq();\n\n\t\tif ( denominator === 0 ) return this.set( 0, 0, 0 );\n\n\t\tconst scalar = v.dot( this ) / denominator;\n\n\t\treturn this.copy( v ).multiplyScalar( scalar );\n\n\t}\n\n\tprojectOnPlane( planeNormal ) {\n\n\t\t_vector.copy( this ).projectOnVector( planeNormal );\n\n\t\treturn this.sub( _vector );\n\n\t}\n\n\treflect( normal ) {\n\n\t\t// reflect incident vector off plane orthogonal to normal\n\t\t// normal is assumed to have unit length\n\n\t\treturn this.sub( _vector.copy( normal ).multiplyScalar( 2 * this.dot( normal ) ) );\n\n\t}\n\n\tangleTo( v ) {\n\n\t\tconst denominator = Math.sqrt( this.lengthSq() * v.lengthSq() );\n\n\t\tif ( denominator === 0 ) return Math.PI / 2;\n\n\t\tconst theta = this.dot( v ) / denominator;\n\n\t\t// clamp, to handle numerical problems\n\n\t\treturn Math.acos( MathUtils.clamp( theta, - 1, 1 ) );\n\n\t}\n\n\tdistanceTo( v ) {\n\n\t\treturn Math.sqrt( this.distanceToSquared( v ) );\n\n\t}\n\n\tdistanceToSquared( v ) {\n\n\t\tconst dx = this.x - v.x, dy = this.y - v.y, dz = this.z - v.z;\n\n\t\treturn dx * dx + dy * dy + dz * dz;\n\n\t}\n\n\tmanhattanDistanceTo( v ) {\n\n\t\treturn Math.abs( this.x - v.x ) + Math.abs( this.y - v.y ) + Math.abs( this.z - v.z );\n\n\t}\n\n\tsetFromSpherical( s ) {\n\n\t\treturn this.setFromSphericalCoords( s.radius, s.phi, s.theta );\n\n\t}\n\n\tsetFromSphericalCoords( radius, phi, theta ) {\n\n\t\tconst sinPhiRadius = Math.sin( phi ) * radius;\n\n\t\tthis.x = sinPhiRadius * Math.sin( theta );\n\t\tthis.y = Math.cos( phi ) * radius;\n\t\tthis.z = sinPhiRadius * Math.cos( theta );\n\n\t\treturn this;\n\n\t}\n\n\tsetFromCylindrical( c ) {\n\n\t\treturn this.setFromCylindricalCoords( c.radius, c.theta, c.y );\n\n\t}\n\n\tsetFromCylindricalCoords( radius, theta, y ) {\n\n\t\tthis.x = radius * Math.sin( theta );\n\t\tthis.y = y;\n\t\tthis.z = radius * Math.cos( theta );\n\n\t\treturn this;\n\n\t}\n\n\tsetFromMatrixPosition( m ) {\n\n\t\tconst e = m.elements;\n\n\t\tthis.x = e[ 12 ];\n\t\tthis.y = e[ 13 ];\n\t\tthis.z = e[ 14 ];\n\n\t\treturn this;\n\n\t}\n\n\tsetFromMatrixScale( m ) {\n\n\t\tconst sx = this.setFromMatrixColumn( m, 0 ).length();\n\t\tconst sy = this.setFromMatrixColumn( m, 1 ).length();\n\t\tconst sz = this.setFromMatrixColumn( m, 2 ).length();\n\n\t\tthis.x = sx;\n\t\tthis.y = sy;\n\t\tthis.z = sz;\n\n\t\treturn this;\n\n\t}\n\n\tsetFromMatrixColumn( m, index ) {\n\n\t\treturn this.fromArray( m.elements, index * 4 );\n\n\t}\n\n\tsetFromMatrix3Column( m, index ) {\n\n\t\treturn this.fromArray( m.elements, index * 3 );\n\n\t}\n\n\tequals( v ) {\n\n\t\treturn ( ( v.x === this.x ) && ( v.y === this.y ) && ( v.z === this.z ) );\n\n\t}\n\n\tfromArray( array, offset = 0 ) {\n\n\t\tthis.x = array[ offset ];\n\t\tthis.y = array[ offset + 1 ];\n\t\tthis.z = array[ offset + 2 ];\n\n\t\treturn this;\n\n\t}\n\n\ttoArray( array = [], offset = 0 ) {\n\n\t\tarray[ offset ] = this.x;\n\t\tarray[ offset + 1 ] = this.y;\n\t\tarray[ offset + 2 ] = this.z;\n\n\t\treturn array;\n\n\t}\n\n\tfromBufferAttribute( attribute, index, offset ) {\n\n\t\tif ( offset !== undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Vector3: offset has been removed from .fromBufferAttribute().' );\n\n\t\t}\n\n\t\tthis.x = attribute.getX( index );\n\t\tthis.y = attribute.getY( index );\n\t\tthis.z = attribute.getZ( index );\n\n\t\treturn this;\n\n\t}\n\n\trandom() {\n\n\t\tthis.x = Math.random();\n\t\tthis.y = Math.random();\n\t\tthis.z = Math.random();\n\n\t\treturn this;\n\n\t}\n\n}\n\nconst _vector = /*@__PURE__*/ new Vector3();\nconst _quaternion = /*@__PURE__*/ new Quaternion();\n\nclass Box3 {\n\n\tconstructor( min, max ) {\n\n\t\tObject.defineProperty( this, 'isBox3', { value: true } );\n\n\t\tthis.min = ( min !== undefined ) ? min : new Vector3( + Infinity, + Infinity, + Infinity );\n\t\tthis.max = ( max !== undefined ) ? max : new Vector3( - Infinity, - Infinity, - Infinity );\n\n\t}\n\n\tset( min, max ) {\n\n\t\tthis.min.copy( min );\n\t\tthis.max.copy( max );\n\n\t\treturn this;\n\n\t}\n\n\tsetFromArray( array ) {\n\n\t\tlet minX = + Infinity;\n\t\tlet minY = + Infinity;\n\t\tlet minZ = + Infinity;\n\n\t\tlet maxX = - Infinity;\n\t\tlet maxY = - Infinity;\n\t\tlet maxZ = - Infinity;\n\n\t\tfor ( let i = 0, l = array.length; i < l; i += 3 ) {\n\n\t\t\tconst x = array[ i ];\n\t\t\tconst y = array[ i + 1 ];\n\t\t\tconst z = array[ i + 2 ];\n\n\t\t\tif ( x < minX ) minX = x;\n\t\t\tif ( y < minY ) minY = y;\n\t\t\tif ( z < minZ ) minZ = z;\n\n\t\t\tif ( x > maxX ) maxX = x;\n\t\t\tif ( y > maxY ) maxY = y;\n\t\t\tif ( z > maxZ ) maxZ = z;\n\n\t\t}\n\n\t\tthis.min.set( minX, minY, minZ );\n\t\tthis.max.set( maxX, maxY, maxZ );\n\n\t\treturn this;\n\n\t}\n\n\tsetFromBufferAttribute( attribute ) {\n\n\t\tlet minX = + Infinity;\n\t\tlet minY = + Infinity;\n\t\tlet minZ = + Infinity;\n\n\t\tlet maxX = - Infinity;\n\t\tlet maxY = - Infinity;\n\t\tlet maxZ = - Infinity;\n\n\t\tfor ( let i = 0, l = attribute.count; i < l; i ++ ) {\n\n\t\t\tconst x = attribute.getX( i );\n\t\t\tconst y = attribute.getY( i );\n\t\t\tconst z = attribute.getZ( i );\n\n\t\t\tif ( x < minX ) minX = x;\n\t\t\tif ( y < minY ) minY = y;\n\t\t\tif ( z < minZ ) minZ = z;\n\n\t\t\tif ( x > maxX ) maxX = x;\n\t\t\tif ( y > maxY ) maxY = y;\n\t\t\tif ( z > maxZ ) maxZ = z;\n\n\t\t}\n\n\t\tthis.min.set( minX, minY, minZ );\n\t\tthis.max.set( maxX, maxY, maxZ );\n\n\t\treturn this;\n\n\t}\n\n\tsetFromPoints( points ) {\n\n\t\tthis.makeEmpty();\n\n\t\tfor ( let i = 0, il = points.length; i < il; i ++ ) {\n\n\t\t\tthis.expandByPoint( points[ i ] );\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n\tsetFromCenterAndSize( center, size ) {\n\n\t\tconst halfSize = _vector$1.copy( size ).multiplyScalar( 0.5 );\n\n\t\tthis.min.copy( center ).sub( halfSize );\n\t\tthis.max.copy( center ).add( halfSize );\n\n\t\treturn this;\n\n\t}\n\n\tsetFromObject( object ) {\n\n\t\tthis.makeEmpty();\n\n\t\treturn this.expandByObject( object );\n\n\t}\n\n\tclone() {\n\n\t\treturn new this.constructor().copy( this );\n\n\t}\n\n\tcopy( box ) {\n\n\t\tthis.min.copy( box.min );\n\t\tthis.max.copy( box.max );\n\n\t\treturn this;\n\n\t}\n\n\tmakeEmpty() {\n\n\t\tthis.min.x = this.min.y = this.min.z = + Infinity;\n\t\tthis.max.x = this.max.y = this.max.z = - Infinity;\n\n\t\treturn this;\n\n\t}\n\n\tisEmpty() {\n\n\t\t// this is a more robust check for empty than ( volume <= 0 ) because volume can get positive with two negative axes\n\n\t\treturn ( this.max.x < this.min.x ) || ( this.max.y < this.min.y ) || ( this.max.z < this.min.z );\n\n\t}\n\n\tgetCenter( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Box3: .getCenter() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\treturn this.isEmpty() ? target.set( 0, 0, 0 ) : target.addVectors( this.min, this.max ).multiplyScalar( 0.5 );\n\n\t}\n\n\tgetSize( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Box3: .getSize() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\treturn this.isEmpty() ? target.set( 0, 0, 0 ) : target.subVectors( this.max, this.min );\n\n\t}\n\n\texpandByPoint( point ) {\n\n\t\tthis.min.min( point );\n\t\tthis.max.max( point );\n\n\t\treturn this;\n\n\t}\n\n\texpandByVector( vector ) {\n\n\t\tthis.min.sub( vector );\n\t\tthis.max.add( vector );\n\n\t\treturn this;\n\n\t}\n\n\texpandByScalar( scalar ) {\n\n\t\tthis.min.addScalar( - scalar );\n\t\tthis.max.addScalar( scalar );\n\n\t\treturn this;\n\n\t}\n\n\texpandByObject( object ) {\n\n\t\t// Computes the world-axis-aligned bounding box of an object (including its children),\n\t\t// accounting for both the object's, and children's, world transforms\n\n\t\tobject.updateWorldMatrix( false, false );\n\n\t\tconst geometry = object.geometry;\n\n\t\tif ( geometry !== undefined ) {\n\n\t\t\tif ( geometry.boundingBox === null ) {\n\n\t\t\t\tgeometry.computeBoundingBox();\n\n\t\t\t}\n\n\t\t\t_box.copy( geometry.boundingBox );\n\t\t\t_box.applyMatrix4( object.matrixWorld );\n\n\t\t\tthis.union( _box );\n\n\t\t}\n\n\t\tconst children = object.children;\n\n\t\tfor ( let i = 0, l = children.length; i < l; i ++ ) {\n\n\t\t\tthis.expandByObject( children[ i ] );\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n\tcontainsPoint( point ) {\n\n\t\treturn point.x < this.min.x || point.x > this.max.x ||\n\t\t\tpoint.y < this.min.y || point.y > this.max.y ||\n\t\t\tpoint.z < this.min.z || point.z > this.max.z ? false : true;\n\n\t}\n\n\tcontainsBox( box ) {\n\n\t\treturn this.min.x <= box.min.x && box.max.x <= this.max.x &&\n\t\t\tthis.min.y <= box.min.y && box.max.y <= this.max.y &&\n\t\t\tthis.min.z <= box.min.z && box.max.z <= this.max.z;\n\n\t}\n\n\tgetParameter( point, target ) {\n\n\t\t// This can potentially have a divide by zero if the box\n\t\t// has a size dimension of 0.\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Box3: .getParameter() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\treturn target.set(\n\t\t\t( point.x - this.min.x ) / ( this.max.x - this.min.x ),\n\t\t\t( point.y - this.min.y ) / ( this.max.y - this.min.y ),\n\t\t\t( point.z - this.min.z ) / ( this.max.z - this.min.z )\n\t\t);\n\n\t}\n\n\tintersectsBox( box ) {\n\n\t\t// using 6 splitting planes to rule out intersections.\n\t\treturn box.max.x < this.min.x || box.min.x > this.max.x ||\n\t\t\tbox.max.y < this.min.y || box.min.y > this.max.y ||\n\t\t\tbox.max.z < this.min.z || box.min.z > this.max.z ? false : true;\n\n\t}\n\n\tintersectsSphere( sphere ) {\n\n\t\t// Find the point on the AABB closest to the sphere center.\n\t\tthis.clampPoint( sphere.center, _vector$1 );\n\n\t\t// If that point is inside the sphere, the AABB and sphere intersect.\n\t\treturn _vector$1.distanceToSquared( sphere.center ) <= ( sphere.radius * sphere.radius );\n\n\t}\n\n\tintersectsPlane( plane ) {\n\n\t\t// We compute the minimum and maximum dot product values. If those values\n\t\t// are on the same side (back or front) of the plane, then there is no intersection.\n\n\t\tlet min, max;\n\n\t\tif ( plane.normal.x > 0 ) {\n\n\t\t\tmin = plane.normal.x * this.min.x;\n\t\t\tmax = plane.normal.x * this.max.x;\n\n\t\t} else {\n\n\t\t\tmin = plane.normal.x * this.max.x;\n\t\t\tmax = plane.normal.x * this.min.x;\n\n\t\t}\n\n\t\tif ( plane.normal.y > 0 ) {\n\n\t\t\tmin += plane.normal.y * this.min.y;\n\t\t\tmax += plane.normal.y * this.max.y;\n\n\t\t} else {\n\n\t\t\tmin += plane.normal.y * this.max.y;\n\t\t\tmax += plane.normal.y * this.min.y;\n\n\t\t}\n\n\t\tif ( plane.normal.z > 0 ) {\n\n\t\t\tmin += plane.normal.z * this.min.z;\n\t\t\tmax += plane.normal.z * this.max.z;\n\n\t\t} else {\n\n\t\t\tmin += plane.normal.z * this.max.z;\n\t\t\tmax += plane.normal.z * this.min.z;\n\n\t\t}\n\n\t\treturn ( min <= - plane.constant && max >= - plane.constant );\n\n\t}\n\n\tintersectsTriangle( triangle ) {\n\n\t\tif ( this.isEmpty() ) {\n\n\t\t\treturn false;\n\n\t\t}\n\n\t\t// compute box center and extents\n\t\tthis.getCenter( _center );\n\t\t_extents.subVectors( this.max, _center );\n\n\t\t// translate triangle to aabb origin\n\t\t_v0.subVectors( triangle.a, _center );\n\t\t_v1.subVectors( triangle.b, _center );\n\t\t_v2.subVectors( triangle.c, _center );\n\n\t\t// compute edge vectors for triangle\n\t\t_f0.subVectors( _v1, _v0 );\n\t\t_f1.subVectors( _v2, _v1 );\n\t\t_f2.subVectors( _v0, _v2 );\n\n\t\t// test against axes that are given by cross product combinations of the edges of the triangle and the edges of the aabb\n\t\t// make an axis testing of each of the 3 sides of the aabb against each of the 3 sides of the triangle = 9 axis of separation\n\t\t// axis_ij = u_i x f_j (u0, u1, u2 = face normals of aabb = x,y,z axes vectors since aabb is axis aligned)\n\t\tlet axes = [\n\t\t\t0, - _f0.z, _f0.y, 0, - _f1.z, _f1.y, 0, - _f2.z, _f2.y,\n\t\t\t_f0.z, 0, - _f0.x, _f1.z, 0, - _f1.x, _f2.z, 0, - _f2.x,\n\t\t\t- _f0.y, _f0.x, 0, - _f1.y, _f1.x, 0, - _f2.y, _f2.x, 0\n\t\t];\n\t\tif ( ! satForAxes( axes, _v0, _v1, _v2, _extents ) ) {\n\n\t\t\treturn false;\n\n\t\t}\n\n\t\t// test 3 face normals from the aabb\n\t\taxes = [ 1, 0, 0, 0, 1, 0, 0, 0, 1 ];\n\t\tif ( ! satForAxes( axes, _v0, _v1, _v2, _extents ) ) {\n\n\t\t\treturn false;\n\n\t\t}\n\n\t\t// finally testing the face normal of the triangle\n\t\t// use already existing triangle edge vectors here\n\t\t_triangleNormal.crossVectors( _f0, _f1 );\n\t\taxes = [ _triangleNormal.x, _triangleNormal.y, _triangleNormal.z ];\n\n\t\treturn satForAxes( axes, _v0, _v1, _v2, _extents );\n\n\t}\n\n\tclampPoint( point, target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Box3: .clampPoint() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\treturn target.copy( point ).clamp( this.min, this.max );\n\n\t}\n\n\tdistanceToPoint( point ) {\n\n\t\tconst clampedPoint = _vector$1.copy( point ).clamp( this.min, this.max );\n\n\t\treturn clampedPoint.sub( point ).length();\n\n\t}\n\n\tgetBoundingSphere( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.error( 'THREE.Box3: .getBoundingSphere() target is now required' );\n\t\t\t//target = new Sphere(); // removed to avoid cyclic dependency\n\n\t\t}\n\n\t\tthis.getCenter( target.center );\n\n\t\ttarget.radius = this.getSize( _vector$1 ).length() * 0.5;\n\n\t\treturn target;\n\n\t}\n\n\tintersect( box ) {\n\n\t\tthis.min.max( box.min );\n\t\tthis.max.min( box.max );\n\n\t\t// ensure that if there is no overlap, the result is fully empty, not slightly empty with non-inf/+inf values that will cause subsequence intersects to erroneously return valid values.\n\t\tif ( this.isEmpty() ) this.makeEmpty();\n\n\t\treturn this;\n\n\t}\n\n\tunion( box ) {\n\n\t\tthis.min.min( box.min );\n\t\tthis.max.max( box.max );\n\n\t\treturn this;\n\n\t}\n\n\tapplyMatrix4( matrix ) {\n\n\t\t// transform of empty box is an empty box.\n\t\tif ( this.isEmpty() ) return this;\n\n\t\t// NOTE: I am using a binary pattern to specify all 2^3 combinations below\n\t\t_points[ 0 ].set( this.min.x, this.min.y, this.min.z ).applyMatrix4( matrix ); // 000\n\t\t_points[ 1 ].set( this.min.x, this.min.y, this.max.z ).applyMatrix4( matrix ); // 001\n\t\t_points[ 2 ].set( this.min.x, this.max.y, this.min.z ).applyMatrix4( matrix ); // 010\n\t\t_points[ 3 ].set( this.min.x, this.max.y, this.max.z ).applyMatrix4( matrix ); // 011\n\t\t_points[ 4 ].set( this.max.x, this.min.y, this.min.z ).applyMatrix4( matrix ); // 100\n\t\t_points[ 5 ].set( this.max.x, this.min.y, this.max.z ).applyMatrix4( matrix ); // 101\n\t\t_points[ 6 ].set( this.max.x, this.max.y, this.min.z ).applyMatrix4( matrix ); // 110\n\t\t_points[ 7 ].set( this.max.x, this.max.y, this.max.z ).applyMatrix4( matrix ); // 111\n\n\t\tthis.setFromPoints( _points );\n\n\t\treturn this;\n\n\t}\n\n\ttranslate( offset ) {\n\n\t\tthis.min.add( offset );\n\t\tthis.max.add( offset );\n\n\t\treturn this;\n\n\t}\n\n\tequals( box ) {\n\n\t\treturn box.min.equals( this.min ) && box.max.equals( this.max );\n\n\t}\n\n}\n\nfunction satForAxes( axes, v0, v1, v2, extents ) {\n\n\tfor ( let i = 0, j = axes.length - 3; i <= j; i += 3 ) {\n\n\t\t_testAxis.fromArray( axes, i );\n\t\t// project the aabb onto the seperating axis\n\t\tconst r = extents.x * Math.abs( _testAxis.x ) + extents.y * Math.abs( _testAxis.y ) + extents.z * Math.abs( _testAxis.z );\n\t\t// project all 3 vertices of the triangle onto the seperating axis\n\t\tconst p0 = v0.dot( _testAxis );\n\t\tconst p1 = v1.dot( _testAxis );\n\t\tconst p2 = v2.dot( _testAxis );\n\t\t// actual test, basically see if either of the most extreme of the triangle points intersects r\n\t\tif ( Math.max( - Math.max( p0, p1, p2 ), Math.min( p0, p1, p2 ) ) > r ) {\n\n\t\t\t// points of the projected triangle are outside the projected half-length of the aabb\n\t\t\t// the axis is seperating and we can exit\n\t\t\treturn false;\n\n\t\t}\n\n\t}\n\n\treturn true;\n\n}\n\nconst _points = [\n\t/*@__PURE__*/ new Vector3(),\n\t/*@__PURE__*/ new Vector3(),\n\t/*@__PURE__*/ new Vector3(),\n\t/*@__PURE__*/ new Vector3(),\n\t/*@__PURE__*/ new Vector3(),\n\t/*@__PURE__*/ new Vector3(),\n\t/*@__PURE__*/ new Vector3(),\n\t/*@__PURE__*/ new Vector3()\n];\n\nconst _vector$1 = /*@__PURE__*/ new Vector3();\n\nconst _box = /*@__PURE__*/ new Box3();\n\n// triangle centered vertices\n\nconst _v0 = /*@__PURE__*/ new Vector3();\nconst _v1 = /*@__PURE__*/ new Vector3();\nconst _v2 = /*@__PURE__*/ new Vector3();\n\n// triangle edge vectors\n\nconst _f0 = /*@__PURE__*/ new Vector3();\nconst _f1 = /*@__PURE__*/ new Vector3();\nconst _f2 = /*@__PURE__*/ new Vector3();\n\nconst _center = /*@__PURE__*/ new Vector3();\nconst _extents = /*@__PURE__*/ new Vector3();\nconst _triangleNormal = /*@__PURE__*/ new Vector3();\nconst _testAxis = /*@__PURE__*/ new Vector3();\n\nconst _box$1 = /*@__PURE__*/ new Box3();\n\nclass Sphere {\n\n\tconstructor( center, radius ) {\n\n\t\tthis.center = ( center !== undefined ) ? center : new Vector3();\n\t\tthis.radius = ( radius !== undefined ) ? radius : - 1;\n\n\t}\n\n\tset( center, radius ) {\n\n\t\tthis.center.copy( center );\n\t\tthis.radius = radius;\n\n\t\treturn this;\n\n\t}\n\n\tsetFromPoints( points, optionalCenter ) {\n\n\t\tconst center = this.center;\n\n\t\tif ( optionalCenter !== undefined ) {\n\n\t\t\tcenter.copy( optionalCenter );\n\n\t\t} else {\n\n\t\t\t_box$1.setFromPoints( points ).getCenter( center );\n\n\t\t}\n\n\t\tlet maxRadiusSq = 0;\n\n\t\tfor ( let i = 0, il = points.length; i < il; i ++ ) {\n\n\t\t\tmaxRadiusSq = Math.max( maxRadiusSq, center.distanceToSquared( points[ i ] ) );\n\n\t\t}\n\n\t\tthis.radius = Math.sqrt( maxRadiusSq );\n\n\t\treturn this;\n\n\t}\n\n\tclone() {\n\n\t\treturn new this.constructor().copy( this );\n\n\t}\n\n\tcopy( sphere ) {\n\n\t\tthis.center.copy( sphere.center );\n\t\tthis.radius = sphere.radius;\n\n\t\treturn this;\n\n\t}\n\n\tisEmpty() {\n\n\t\treturn ( this.radius < 0 );\n\n\t}\n\n\tmakeEmpty() {\n\n\t\tthis.center.set( 0, 0, 0 );\n\t\tthis.radius = - 1;\n\n\t\treturn this;\n\n\t}\n\n\tcontainsPoint( point ) {\n\n\t\treturn ( point.distanceToSquared( this.center ) <= ( this.radius * this.radius ) );\n\n\t}\n\n\tdistanceToPoint( point ) {\n\n\t\treturn ( point.distanceTo( this.center ) - this.radius );\n\n\t}\n\n\tintersectsSphere( sphere ) {\n\n\t\tconst radiusSum = this.radius + sphere.radius;\n\n\t\treturn sphere.center.distanceToSquared( this.center ) <= ( radiusSum * radiusSum );\n\n\t}\n\n\tintersectsBox( box ) {\n\n\t\treturn box.intersectsSphere( this );\n\n\t}\n\n\tintersectsPlane( plane ) {\n\n\t\treturn Math.abs( plane.distanceToPoint( this.center ) ) <= this.radius;\n\n\t}\n\n\tclampPoint( point, target ) {\n\n\t\tconst deltaLengthSq = this.center.distanceToSquared( point );\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Sphere: .clampPoint() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\ttarget.copy( point );\n\n\t\tif ( deltaLengthSq > ( this.radius * this.radius ) ) {\n\n\t\t\ttarget.sub( this.center ).normalize();\n\t\t\ttarget.multiplyScalar( this.radius ).add( this.center );\n\n\t\t}\n\n\t\treturn target;\n\n\t}\n\n\tgetBoundingBox( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Sphere: .getBoundingBox() target is now required' );\n\t\t\ttarget = new Box3();\n\n\t\t}\n\n\t\tif ( this.isEmpty() ) {\n\n\t\t\t// Empty sphere produces empty bounding box\n\t\t\ttarget.makeEmpty();\n\t\t\treturn target;\n\n\t\t}\n\n\t\ttarget.set( this.center, this.center );\n\t\ttarget.expandByScalar( this.radius );\n\n\t\treturn target;\n\n\t}\n\n\tapplyMatrix4( matrix ) {\n\n\t\tthis.center.applyMatrix4( matrix );\n\t\tthis.radius = this.radius * matrix.getMaxScaleOnAxis();\n\n\t\treturn this;\n\n\t}\n\n\ttranslate( offset ) {\n\n\t\tthis.center.add( offset );\n\n\t\treturn this;\n\n\t}\n\n\tequals( sphere ) {\n\n\t\treturn sphere.center.equals( this.center ) && ( sphere.radius === this.radius );\n\n\t}\n\n}\n\nconst _vector$2 = /*@__PURE__*/ new Vector3();\nconst _segCenter = /*@__PURE__*/ new Vector3();\nconst _segDir = /*@__PURE__*/ new Vector3();\nconst _diff = /*@__PURE__*/ new Vector3();\n\nconst _edge1 = /*@__PURE__*/ new Vector3();\nconst _edge2 = /*@__PURE__*/ new Vector3();\nconst _normal = /*@__PURE__*/ new Vector3();\n\nclass Ray {\n\n\tconstructor( origin, direction ) {\n\n\t\tthis.origin = ( origin !== undefined ) ? origin : new Vector3();\n\t\tthis.direction = ( direction !== undefined ) ? direction : new Vector3( 0, 0, - 1 );\n\n\t}\n\n\tset( origin, direction ) {\n\n\t\tthis.origin.copy( origin );\n\t\tthis.direction.copy( direction );\n\n\t\treturn this;\n\n\t}\n\n\tclone() {\n\n\t\treturn new this.constructor().copy( this );\n\n\t}\n\n\tcopy( ray ) {\n\n\t\tthis.origin.copy( ray.origin );\n\t\tthis.direction.copy( ray.direction );\n\n\t\treturn this;\n\n\t}\n\n\tat( t, target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Ray: .at() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\treturn target.copy( this.direction ).multiplyScalar( t ).add( this.origin );\n\n\t}\n\n\tlookAt( v ) {\n\n\t\tthis.direction.copy( v ).sub( this.origin ).normalize();\n\n\t\treturn this;\n\n\t}\n\n\trecast( t ) {\n\n\t\tthis.origin.copy( this.at( t, _vector$2 ) );\n\n\t\treturn this;\n\n\t}\n\n\tclosestPointToPoint( point, target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Ray: .closestPointToPoint() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\ttarget.subVectors( point, this.origin );\n\n\t\tconst directionDistance = target.dot( this.direction );\n\n\t\tif ( directionDistance < 0 ) {\n\n\t\t\treturn target.copy( this.origin );\n\n\t\t}\n\n\t\treturn target.copy( this.direction ).multiplyScalar( directionDistance ).add( this.origin );\n\n\t}\n\n\tdistanceToPoint( point ) {\n\n\t\treturn Math.sqrt( this.distanceSqToPoint( point ) );\n\n\t}\n\n\tdistanceSqToPoint( point ) {\n\n\t\tconst directionDistance = _vector$2.subVectors( point, this.origin ).dot( this.direction );\n\n\t\t// point behind the ray\n\n\t\tif ( directionDistance < 0 ) {\n\n\t\t\treturn this.origin.distanceToSquared( point );\n\n\t\t}\n\n\t\t_vector$2.copy( this.direction ).multiplyScalar( directionDistance ).add( this.origin );\n\n\t\treturn _vector$2.distanceToSquared( point );\n\n\t}\n\n\tdistanceSqToSegment( v0, v1, optionalPointOnRay, optionalPointOnSegment ) {\n\n\t\t// from http://www.geometrictools.com/GTEngine/Include/Mathematics/GteDistRaySegment.h\n\t\t// It returns the min distance between the ray and the segment\n\t\t// defined by v0 and v1\n\t\t// It can also set two optional targets :\n\t\t// - The closest point on the ray\n\t\t// - The closest point on the segment\n\n\t\t_segCenter.copy( v0 ).add( v1 ).multiplyScalar( 0.5 );\n\t\t_segDir.copy( v1 ).sub( v0 ).normalize();\n\t\t_diff.copy( this.origin ).sub( _segCenter );\n\n\t\tconst segExtent = v0.distanceTo( v1 ) * 0.5;\n\t\tconst a01 = - this.direction.dot( _segDir );\n\t\tconst b0 = _diff.dot( this.direction );\n\t\tconst b1 = - _diff.dot( _segDir );\n\t\tconst c = _diff.lengthSq();\n\t\tconst det = Math.abs( 1 - a01 * a01 );\n\t\tlet s0, s1, sqrDist, extDet;\n\n\t\tif ( det > 0 ) {\n\n\t\t\t// The ray and segment are not parallel.\n\n\t\t\ts0 = a01 * b1 - b0;\n\t\t\ts1 = a01 * b0 - b1;\n\t\t\textDet = segExtent * det;\n\n\t\t\tif ( s0 >= 0 ) {\n\n\t\t\t\tif ( s1 >= - extDet ) {\n\n\t\t\t\t\tif ( s1 <= extDet ) {\n\n\t\t\t\t\t\t// region 0\n\t\t\t\t\t\t// Minimum at interior points of ray and segment.\n\n\t\t\t\t\t\tconst invDet = 1 / det;\n\t\t\t\t\t\ts0 *= invDet;\n\t\t\t\t\t\ts1 *= invDet;\n\t\t\t\t\t\tsqrDist = s0 * ( s0 + a01 * s1 + 2 * b0 ) + s1 * ( a01 * s0 + s1 + 2 * b1 ) + c;\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\t// region 1\n\n\t\t\t\t\t\ts1 = segExtent;\n\t\t\t\t\t\ts0 = Math.max( 0, - ( a01 * s1 + b0 ) );\n\t\t\t\t\t\tsqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;\n\n\t\t\t\t\t}\n\n\t\t\t\t} else {\n\n\t\t\t\t\t// region 5\n\n\t\t\t\t\ts1 = - segExtent;\n\t\t\t\t\ts0 = Math.max( 0, - ( a01 * s1 + b0 ) );\n\t\t\t\t\tsqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;\n\n\t\t\t\t}\n\n\t\t\t} else {\n\n\t\t\t\tif ( s1 <= - extDet ) {\n\n\t\t\t\t\t// region 4\n\n\t\t\t\t\ts0 = Math.max( 0, - ( - a01 * segExtent + b0 ) );\n\t\t\t\t\ts1 = ( s0 > 0 ) ? - segExtent : Math.min( Math.max( - segExtent, - b1 ), segExtent );\n\t\t\t\t\tsqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;\n\n\t\t\t\t} else if ( s1 <= extDet ) {\n\n\t\t\t\t\t// region 3\n\n\t\t\t\t\ts0 = 0;\n\t\t\t\t\ts1 = Math.min( Math.max( - segExtent, - b1 ), segExtent );\n\t\t\t\t\tsqrDist = s1 * ( s1 + 2 * b1 ) + c;\n\n\t\t\t\t} else {\n\n\t\t\t\t\t// region 2\n\n\t\t\t\t\ts0 = Math.max( 0, - ( a01 * segExtent + b0 ) );\n\t\t\t\t\ts1 = ( s0 > 0 ) ? segExtent : Math.min( Math.max( - segExtent, - b1 ), segExtent );\n\t\t\t\t\tsqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\t// Ray and segment are parallel.\n\n\t\t\ts1 = ( a01 > 0 ) ? - segExtent : segExtent;\n\t\t\ts0 = Math.max( 0, - ( a01 * s1 + b0 ) );\n\t\t\tsqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;\n\n\t\t}\n\n\t\tif ( optionalPointOnRay ) {\n\n\t\t\toptionalPointOnRay.copy( this.direction ).multiplyScalar( s0 ).add( this.origin );\n\n\t\t}\n\n\t\tif ( optionalPointOnSegment ) {\n\n\t\t\toptionalPointOnSegment.copy( _segDir ).multiplyScalar( s1 ).add( _segCenter );\n\n\t\t}\n\n\t\treturn sqrDist;\n\n\t}\n\n\tintersectSphere( sphere, target ) {\n\n\t\t_vector$2.subVectors( sphere.center, this.origin );\n\t\tconst tca = _vector$2.dot( this.direction );\n\t\tconst d2 = _vector$2.dot( _vector$2 ) - tca * tca;\n\t\tconst radius2 = sphere.radius * sphere.radius;\n\n\t\tif ( d2 > radius2 ) return null;\n\n\t\tconst thc = Math.sqrt( radius2 - d2 );\n\n\t\t// t0 = first intersect point - entrance on front of sphere\n\t\tconst t0 = tca - thc;\n\n\t\t// t1 = second intersect point - exit point on back of sphere\n\t\tconst t1 = tca + thc;\n\n\t\t// test to see if both t0 and t1 are behind the ray - if so, return null\n\t\tif ( t0 < 0 && t1 < 0 ) return null;\n\n\t\t// test to see if t0 is behind the ray:\n\t\t// if it is, the ray is inside the sphere, so return the second exit point scaled by t1,\n\t\t// in order to always return an intersect point that is in front of the ray.\n\t\tif ( t0 < 0 ) return this.at( t1, target );\n\n\t\t// else t0 is in front of the ray, so return the first collision point scaled by t0\n\t\treturn this.at( t0, target );\n\n\t}\n\n\tintersectsSphere( sphere ) {\n\n\t\treturn this.distanceSqToPoint( sphere.center ) <= ( sphere.radius * sphere.radius );\n\n\t}\n\n\tdistanceToPlane( plane ) {\n\n\t\tconst denominator = plane.normal.dot( this.direction );\n\n\t\tif ( denominator === 0 ) {\n\n\t\t\t// line is coplanar, return origin\n\t\t\tif ( plane.distanceToPoint( this.origin ) === 0 ) {\n\n\t\t\t\treturn 0;\n\n\t\t\t}\n\n\t\t\t// Null is preferable to undefined since undefined means.... it is undefined\n\n\t\t\treturn null;\n\n\t\t}\n\n\t\tconst t = - ( this.origin.dot( plane.normal ) + plane.constant ) / denominator;\n\n\t\t// Return if the ray never intersects the plane\n\n\t\treturn t >= 0 ? t : null;\n\n\t}\n\n\tintersectPlane( plane, target ) {\n\n\t\tconst t = this.distanceToPlane( plane );\n\n\t\tif ( t === null ) {\n\n\t\t\treturn null;\n\n\t\t}\n\n\t\treturn this.at( t, target );\n\n\t}\n\n\tintersectsPlane( plane ) {\n\n\t\t// check if the ray lies on the plane first\n\n\t\tconst distToPoint = plane.distanceToPoint( this.origin );\n\n\t\tif ( distToPoint === 0 ) {\n\n\t\t\treturn true;\n\n\t\t}\n\n\t\tconst denominator = plane.normal.dot( this.direction );\n\n\t\tif ( denominator * distToPoint < 0 ) {\n\n\t\t\treturn true;\n\n\t\t}\n\n\t\t// ray origin is behind the plane (and is pointing behind it)\n\n\t\treturn false;\n\n\t}\n\n\tintersectBox( box, target ) {\n\n\t\tlet tmin, tmax, tymin, tymax, tzmin, tzmax;\n\n\t\tconst invdirx = 1 / this.direction.x,\n\t\t\tinvdiry = 1 / this.direction.y,\n\t\t\tinvdirz = 1 / this.direction.z;\n\n\t\tconst origin = this.origin;\n\n\t\tif ( invdirx >= 0 ) {\n\n\t\t\ttmin = ( box.min.x - origin.x ) * invdirx;\n\t\t\ttmax = ( box.max.x - origin.x ) * invdirx;\n\n\t\t} else {\n\n\t\t\ttmin = ( box.max.x - origin.x ) * invdirx;\n\t\t\ttmax = ( box.min.x - origin.x ) * invdirx;\n\n\t\t}\n\n\t\tif ( invdiry >= 0 ) {\n\n\t\t\ttymin = ( box.min.y - origin.y ) * invdiry;\n\t\t\ttymax = ( box.max.y - origin.y ) * invdiry;\n\n\t\t} else {\n\n\t\t\ttymin = ( box.max.y - origin.y ) * invdiry;\n\t\t\ttymax = ( box.min.y - origin.y ) * invdiry;\n\n\t\t}\n\n\t\tif ( ( tmin > tymax ) || ( tymin > tmax ) ) return null;\n\n\t\t// These lines also handle the case where tmin or tmax is NaN\n\t\t// (result of 0 * Infinity). x !== x returns true if x is NaN\n\n\t\tif ( tymin > tmin || tmin !== tmin ) tmin = tymin;\n\n\t\tif ( tymax < tmax || tmax !== tmax ) tmax = tymax;\n\n\t\tif ( invdirz >= 0 ) {\n\n\t\t\ttzmin = ( box.min.z - origin.z ) * invdirz;\n\t\t\ttzmax = ( box.max.z - origin.z ) * invdirz;\n\n\t\t} else {\n\n\t\t\ttzmin = ( box.max.z - origin.z ) * invdirz;\n\t\t\ttzmax = ( box.min.z - origin.z ) * invdirz;\n\n\t\t}\n\n\t\tif ( ( tmin > tzmax ) || ( tzmin > tmax ) ) return null;\n\n\t\tif ( tzmin > tmin || tmin !== tmin ) tmin = tzmin;\n\n\t\tif ( tzmax < tmax || tmax !== tmax ) tmax = tzmax;\n\n\t\t//return point closest to the ray (positive side)\n\n\t\tif ( tmax < 0 ) return null;\n\n\t\treturn this.at( tmin >= 0 ? tmin : tmax, target );\n\n\t}\n\n\tintersectsBox( box ) {\n\n\t\treturn this.intersectBox( box, _vector$2 ) !== null;\n\n\t}\n\n\tintersectTriangle( a, b, c, backfaceCulling, target ) {\n\n\t\t// Compute the offset origin, edges, and normal.\n\n\t\t// from http://www.geometrictools.com/GTEngine/Include/Mathematics/GteIntrRay3Triangle3.h\n\n\t\t_edge1.subVectors( b, a );\n\t\t_edge2.subVectors( c, a );\n\t\t_normal.crossVectors( _edge1, _edge2 );\n\n\t\t// Solve Q + t*D = b1*E1 + b2*E2 (Q = kDiff, D = ray direction,\n\t\t// E1 = kEdge1, E2 = kEdge2, N = Cross(E1,E2)) by\n\t\t//   |Dot(D,N)|*b1 = sign(Dot(D,N))*Dot(D,Cross(Q,E2))\n\t\t//   |Dot(D,N)|*b2 = sign(Dot(D,N))*Dot(D,Cross(E1,Q))\n\t\t//   |Dot(D,N)|*t = -sign(Dot(D,N))*Dot(Q,N)\n\t\tlet DdN = this.direction.dot( _normal );\n\t\tlet sign;\n\n\t\tif ( DdN > 0 ) {\n\n\t\t\tif ( backfaceCulling ) return null;\n\t\t\tsign = 1;\n\n\t\t} else if ( DdN < 0 ) {\n\n\t\t\tsign = - 1;\n\t\t\tDdN = - DdN;\n\n\t\t} else {\n\n\t\t\treturn null;\n\n\t\t}\n\n\t\t_diff.subVectors( this.origin, a );\n\t\tconst DdQxE2 = sign * this.direction.dot( _edge2.crossVectors( _diff, _edge2 ) );\n\n\t\t// b1 < 0, no intersection\n\t\tif ( DdQxE2 < 0 ) {\n\n\t\t\treturn null;\n\n\t\t}\n\n\t\tconst DdE1xQ = sign * this.direction.dot( _edge1.cross( _diff ) );\n\n\t\t// b2 < 0, no intersection\n\t\tif ( DdE1xQ < 0 ) {\n\n\t\t\treturn null;\n\n\t\t}\n\n\t\t// b1+b2 > 1, no intersection\n\t\tif ( DdQxE2 + DdE1xQ > DdN ) {\n\n\t\t\treturn null;\n\n\t\t}\n\n\t\t// Line intersects triangle, check if ray does.\n\t\tconst QdN = - sign * _diff.dot( _normal );\n\n\t\t// t < 0, no intersection\n\t\tif ( QdN < 0 ) {\n\n\t\t\treturn null;\n\n\t\t}\n\n\t\t// Ray intersects triangle.\n\t\treturn this.at( QdN / DdN, target );\n\n\t}\n\n\tapplyMatrix4( matrix4 ) {\n\n\t\tthis.origin.applyMatrix4( matrix4 );\n\t\tthis.direction.transformDirection( matrix4 );\n\n\t\treturn this;\n\n\t}\n\n\tequals( ray ) {\n\n\t\treturn ray.origin.equals( this.origin ) && ray.direction.equals( this.direction );\n\n\t}\n\n}\n\nclass Matrix4 {\n\n\tconstructor() {\n\n\t\tObject.defineProperty( this, 'isMatrix4', { value: true } );\n\n\t\tthis.elements = [\n\n\t\t\t1, 0, 0, 0,\n\t\t\t0, 1, 0, 0,\n\t\t\t0, 0, 1, 0,\n\t\t\t0, 0, 0, 1\n\n\t\t];\n\n\t\tif ( arguments.length > 0 ) {\n\n\t\t\tconsole.error( 'THREE.Matrix4: the constructor no longer reads arguments. use .set() instead.' );\n\n\t\t}\n\n\t}\n\n\tset( n11, n12, n13, n14, n21, n22, n23, n24, n31, n32, n33, n34, n41, n42, n43, n44 ) {\n\n\t\tconst te = this.elements;\n\n\t\tte[ 0 ] = n11; te[ 4 ] = n12; te[ 8 ] = n13; te[ 12 ] = n14;\n\t\tte[ 1 ] = n21; te[ 5 ] = n22; te[ 9 ] = n23; te[ 13 ] = n24;\n\t\tte[ 2 ] = n31; te[ 6 ] = n32; te[ 10 ] = n33; te[ 14 ] = n34;\n\t\tte[ 3 ] = n41; te[ 7 ] = n42; te[ 11 ] = n43; te[ 15 ] = n44;\n\n\t\treturn this;\n\n\t}\n\n\tidentity() {\n\n\t\tthis.set(\n\n\t\t\t1, 0, 0, 0,\n\t\t\t0, 1, 0, 0,\n\t\t\t0, 0, 1, 0,\n\t\t\t0, 0, 0, 1\n\n\t\t);\n\n\t\treturn this;\n\n\t}\n\n\tclone() {\n\n\t\treturn new Matrix4().fromArray( this.elements );\n\n\t}\n\n\tcopy( m ) {\n\n\t\tconst te = this.elements;\n\t\tconst me = m.elements;\n\n\t\tte[ 0 ] = me[ 0 ]; te[ 1 ] = me[ 1 ]; te[ 2 ] = me[ 2 ]; te[ 3 ] = me[ 3 ];\n\t\tte[ 4 ] = me[ 4 ]; te[ 5 ] = me[ 5 ]; te[ 6 ] = me[ 6 ]; te[ 7 ] = me[ 7 ];\n\t\tte[ 8 ] = me[ 8 ]; te[ 9 ] = me[ 9 ]; te[ 10 ] = me[ 10 ]; te[ 11 ] = me[ 11 ];\n\t\tte[ 12 ] = me[ 12 ]; te[ 13 ] = me[ 13 ]; te[ 14 ] = me[ 14 ]; te[ 15 ] = me[ 15 ];\n\n\t\treturn this;\n\n\t}\n\n\tcopyPosition( m ) {\n\n\t\tconst te = this.elements, me = m.elements;\n\n\t\tte[ 12 ] = me[ 12 ];\n\t\tte[ 13 ] = me[ 13 ];\n\t\tte[ 14 ] = me[ 14 ];\n\n\t\treturn this;\n\n\t}\n\n\tsetFromMatrix3( m ) {\n\n\t\tconst me = m.elements;\n\n\t\tthis.set(\n\n\t\t\tme[ 0 ], me[ 3 ], me[ 6 ], 0,\n\t\t\tme[ 1 ], me[ 4 ], me[ 7 ], 0,\n\t\t\tme[ 2 ], me[ 5 ], me[ 8 ], 0,\n\t\t\t0, 0, 0, 1\n\n\t\t);\n\n\t\treturn this;\n\n\t}\n\n\textractBasis( xAxis, yAxis, zAxis ) {\n\n\t\txAxis.setFromMatrixColumn( this, 0 );\n\t\tyAxis.setFromMatrixColumn( this, 1 );\n\t\tzAxis.setFromMatrixColumn( this, 2 );\n\n\t\treturn this;\n\n\t}\n\n\tmakeBasis( xAxis, yAxis, zAxis ) {\n\n\t\tthis.set(\n\t\t\txAxis.x, yAxis.x, zAxis.x, 0,\n\t\t\txAxis.y, yAxis.y, zAxis.y, 0,\n\t\t\txAxis.z, yAxis.z, zAxis.z, 0,\n\t\t\t0, 0, 0, 1\n\t\t);\n\n\t\treturn this;\n\n\t}\n\n\textractRotation( m ) {\n\n\t\t// this method does not support reflection matrices\n\n\t\tconst te = this.elements;\n\t\tconst me = m.elements;\n\n\t\tconst scaleX = 1 / _v1$1.setFromMatrixColumn( m, 0 ).length();\n\t\tconst scaleY = 1 / _v1$1.setFromMatrixColumn( m, 1 ).length();\n\t\tconst scaleZ = 1 / _v1$1.setFromMatrixColumn( m, 2 ).length();\n\n\t\tte[ 0 ] = me[ 0 ] * scaleX;\n\t\tte[ 1 ] = me[ 1 ] * scaleX;\n\t\tte[ 2 ] = me[ 2 ] * scaleX;\n\t\tte[ 3 ] = 0;\n\n\t\tte[ 4 ] = me[ 4 ] * scaleY;\n\t\tte[ 5 ] = me[ 5 ] * scaleY;\n\t\tte[ 6 ] = me[ 6 ] * scaleY;\n\t\tte[ 7 ] = 0;\n\n\t\tte[ 8 ] = me[ 8 ] * scaleZ;\n\t\tte[ 9 ] = me[ 9 ] * scaleZ;\n\t\tte[ 10 ] = me[ 10 ] * scaleZ;\n\t\tte[ 11 ] = 0;\n\n\t\tte[ 12 ] = 0;\n\t\tte[ 13 ] = 0;\n\t\tte[ 14 ] = 0;\n\t\tte[ 15 ] = 1;\n\n\t\treturn this;\n\n\t}\n\n\tmakeRotationFromEuler( euler ) {\n\n\t\tif ( ! ( euler && euler.isEuler ) ) {\n\n\t\t\tconsole.error( 'THREE.Matrix4: .makeRotationFromEuler() now expects a Euler rotation rather than a Vector3 and order.' );\n\n\t\t}\n\n\t\tconst te = this.elements;\n\n\t\tconst x = euler.x, y = euler.y, z = euler.z;\n\t\tconst a = Math.cos( x ), b = Math.sin( x );\n\t\tconst c = Math.cos( y ), d = Math.sin( y );\n\t\tconst e = Math.cos( z ), f = Math.sin( z );\n\n\t\tif ( euler.order === 'XYZ' ) {\n\n\t\t\tconst ae = a * e, af = a * f, be = b * e, bf = b * f;\n\n\t\t\tte[ 0 ] = c * e;\n\t\t\tte[ 4 ] = - c * f;\n\t\t\tte[ 8 ] = d;\n\n\t\t\tte[ 1 ] = af + be * d;\n\t\t\tte[ 5 ] = ae - bf * d;\n\t\t\tte[ 9 ] = - b * c;\n\n\t\t\tte[ 2 ] = bf - ae * d;\n\t\t\tte[ 6 ] = be + af * d;\n\t\t\tte[ 10 ] = a * c;\n\n\t\t} else if ( euler.order === 'YXZ' ) {\n\n\t\t\tconst ce = c * e, cf = c * f, de = d * e, df = d * f;\n\n\t\t\tte[ 0 ] = ce + df * b;\n\t\t\tte[ 4 ] = de * b - cf;\n\t\t\tte[ 8 ] = a * d;\n\n\t\t\tte[ 1 ] = a * f;\n\t\t\tte[ 5 ] = a * e;\n\t\t\tte[ 9 ] = - b;\n\n\t\t\tte[ 2 ] = cf * b - de;\n\t\t\tte[ 6 ] = df + ce * b;\n\t\t\tte[ 10 ] = a * c;\n\n\t\t} else if ( euler.order === 'ZXY' ) {\n\n\t\t\tconst ce = c * e, cf = c * f, de = d * e, df = d * f;\n\n\t\t\tte[ 0 ] = ce - df * b;\n\t\t\tte[ 4 ] = - a * f;\n\t\t\tte[ 8 ] = de + cf * b;\n\n\t\t\tte[ 1 ] = cf + de * b;\n\t\t\tte[ 5 ] = a * e;\n\t\t\tte[ 9 ] = df - ce * b;\n\n\t\t\tte[ 2 ] = - a * d;\n\t\t\tte[ 6 ] = b;\n\t\t\tte[ 10 ] = a * c;\n\n\t\t} else if ( euler.order === 'ZYX' ) {\n\n\t\t\tconst ae = a * e, af = a * f, be = b * e, bf = b * f;\n\n\t\t\tte[ 0 ] = c * e;\n\t\t\tte[ 4 ] = be * d - af;\n\t\t\tte[ 8 ] = ae * d + bf;\n\n\t\t\tte[ 1 ] = c * f;\n\t\t\tte[ 5 ] = bf * d + ae;\n\t\t\tte[ 9 ] = af * d - be;\n\n\t\t\tte[ 2 ] = - d;\n\t\t\tte[ 6 ] = b * c;\n\t\t\tte[ 10 ] = a * c;\n\n\t\t} else if ( euler.order === 'YZX' ) {\n\n\t\t\tconst ac = a * c, ad = a * d, bc = b * c, bd = b * d;\n\n\t\t\tte[ 0 ] = c * e;\n\t\t\tte[ 4 ] = bd - ac * f;\n\t\t\tte[ 8 ] = bc * f + ad;\n\n\t\t\tte[ 1 ] = f;\n\t\t\tte[ 5 ] = a * e;\n\t\t\tte[ 9 ] = - b * e;\n\n\t\t\tte[ 2 ] = - d * e;\n\t\t\tte[ 6 ] = ad * f + bc;\n\t\t\tte[ 10 ] = ac - bd * f;\n\n\t\t} else if ( euler.order === 'XZY' ) {\n\n\t\t\tconst ac = a * c, ad = a * d, bc = b * c, bd = b * d;\n\n\t\t\tte[ 0 ] = c * e;\n\t\t\tte[ 4 ] = - f;\n\t\t\tte[ 8 ] = d * e;\n\n\t\t\tte[ 1 ] = ac * f + bd;\n\t\t\tte[ 5 ] = a * e;\n\t\t\tte[ 9 ] = ad * f - bc;\n\n\t\t\tte[ 2 ] = bc * f - ad;\n\t\t\tte[ 6 ] = b * e;\n\t\t\tte[ 10 ] = bd * f + ac;\n\n\t\t}\n\n\t\t// bottom row\n\t\tte[ 3 ] = 0;\n\t\tte[ 7 ] = 0;\n\t\tte[ 11 ] = 0;\n\n\t\t// last column\n\t\tte[ 12 ] = 0;\n\t\tte[ 13 ] = 0;\n\t\tte[ 14 ] = 0;\n\t\tte[ 15 ] = 1;\n\n\t\treturn this;\n\n\t}\n\n\tmakeRotationFromQuaternion( q ) {\n\n\t\treturn this.compose( _zero, q, _one );\n\n\t}\n\n\tlookAt( eye, target, up ) {\n\n\t\tconst te = this.elements;\n\n\t\t_z.subVectors( eye, target );\n\n\t\tif ( _z.lengthSq() === 0 ) {\n\n\t\t\t// eye and target are in the same position\n\n\t\t\t_z.z = 1;\n\n\t\t}\n\n\t\t_z.normalize();\n\t\t_x.crossVectors( up, _z );\n\n\t\tif ( _x.lengthSq() === 0 ) {\n\n\t\t\t// up and z are parallel\n\n\t\t\tif ( Math.abs( up.z ) === 1 ) {\n\n\t\t\t\t_z.x += 0.0001;\n\n\t\t\t} else {\n\n\t\t\t\t_z.z += 0.0001;\n\n\t\t\t}\n\n\t\t\t_z.normalize();\n\t\t\t_x.crossVectors( up, _z );\n\n\t\t}\n\n\t\t_x.normalize();\n\t\t_y.crossVectors( _z, _x );\n\n\t\tte[ 0 ] = _x.x; te[ 4 ] = _y.x; te[ 8 ] = _z.x;\n\t\tte[ 1 ] = _x.y; te[ 5 ] = _y.y; te[ 9 ] = _z.y;\n\t\tte[ 2 ] = _x.z; te[ 6 ] = _y.z; te[ 10 ] = _z.z;\n\n\t\treturn this;\n\n\t}\n\n\tmultiply( m, n ) {\n\n\t\tif ( n !== undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Matrix4: .multiply() now only accepts one argument. Use .multiplyMatrices( a, b ) instead.' );\n\t\t\treturn this.multiplyMatrices( m, n );\n\n\t\t}\n\n\t\treturn this.multiplyMatrices( this, m );\n\n\t}\n\n\tpremultiply( m ) {\n\n\t\treturn this.multiplyMatrices( m, this );\n\n\t}\n\n\tmultiplyMatrices( a, b ) {\n\n\t\tconst ae = a.elements;\n\t\tconst be = b.elements;\n\t\tconst te = this.elements;\n\n\t\tconst a11 = ae[ 0 ], a12 = ae[ 4 ], a13 = ae[ 8 ], a14 = ae[ 12 ];\n\t\tconst a21 = ae[ 1 ], a22 = ae[ 5 ], a23 = ae[ 9 ], a24 = ae[ 13 ];\n\t\tconst a31 = ae[ 2 ], a32 = ae[ 6 ], a33 = ae[ 10 ], a34 = ae[ 14 ];\n\t\tconst a41 = ae[ 3 ], a42 = ae[ 7 ], a43 = ae[ 11 ], a44 = ae[ 15 ];\n\n\t\tconst b11 = be[ 0 ], b12 = be[ 4 ], b13 = be[ 8 ], b14 = be[ 12 ];\n\t\tconst b21 = be[ 1 ], b22 = be[ 5 ], b23 = be[ 9 ], b24 = be[ 13 ];\n\t\tconst b31 = be[ 2 ], b32 = be[ 6 ], b33 = be[ 10 ], b34 = be[ 14 ];\n\t\tconst b41 = be[ 3 ], b42 = be[ 7 ], b43 = be[ 11 ], b44 = be[ 15 ];\n\n\t\tte[ 0 ] = a11 * b11 + a12 * b21 + a13 * b31 + a14 * b41;\n\t\tte[ 4 ] = a11 * b12 + a12 * b22 + a13 * b32 + a14 * b42;\n\t\tte[ 8 ] = a11 * b13 + a12 * b23 + a13 * b33 + a14 * b43;\n\t\tte[ 12 ] = a11 * b14 + a12 * b24 + a13 * b34 + a14 * b44;\n\n\t\tte[ 1 ] = a21 * b11 + a22 * b21 + a23 * b31 + a24 * b41;\n\t\tte[ 5 ] = a21 * b12 + a22 * b22 + a23 * b32 + a24 * b42;\n\t\tte[ 9 ] = a21 * b13 + a22 * b23 + a23 * b33 + a24 * b43;\n\t\tte[ 13 ] = a21 * b14 + a22 * b24 + a23 * b34 + a24 * b44;\n\n\t\tte[ 2 ] = a31 * b11 + a32 * b21 + a33 * b31 + a34 * b41;\n\t\tte[ 6 ] = a31 * b12 + a32 * b22 + a33 * b32 + a34 * b42;\n\t\tte[ 10 ] = a31 * b13 + a32 * b23 + a33 * b33 + a34 * b43;\n\t\tte[ 14 ] = a31 * b14 + a32 * b24 + a33 * b34 + a34 * b44;\n\n\t\tte[ 3 ] = a41 * b11 + a42 * b21 + a43 * b31 + a44 * b41;\n\t\tte[ 7 ] = a41 * b12 + a42 * b22 + a43 * b32 + a44 * b42;\n\t\tte[ 11 ] = a41 * b13 + a42 * b23 + a43 * b33 + a44 * b43;\n\t\tte[ 15 ] = a41 * b14 + a42 * b24 + a43 * b34 + a44 * b44;\n\n\t\treturn this;\n\n\t}\n\n\tmultiplyScalar( s ) {\n\n\t\tconst te = this.elements;\n\n\t\tte[ 0 ] *= s; te[ 4 ] *= s; te[ 8 ] *= s; te[ 12 ] *= s;\n\t\tte[ 1 ] *= s; te[ 5 ] *= s; te[ 9 ] *= s; te[ 13 ] *= s;\n\t\tte[ 2 ] *= s; te[ 6 ] *= s; te[ 10 ] *= s; te[ 14 ] *= s;\n\t\tte[ 3 ] *= s; te[ 7 ] *= s; te[ 11 ] *= s; te[ 15 ] *= s;\n\n\t\treturn this;\n\n\t}\n\n\tdeterminant() {\n\n\t\tconst te = this.elements;\n\n\t\tconst n11 = te[ 0 ], n12 = te[ 4 ], n13 = te[ 8 ], n14 = te[ 12 ];\n\t\tconst n21 = te[ 1 ], n22 = te[ 5 ], n23 = te[ 9 ], n24 = te[ 13 ];\n\t\tconst n31 = te[ 2 ], n32 = te[ 6 ], n33 = te[ 10 ], n34 = te[ 14 ];\n\t\tconst n41 = te[ 3 ], n42 = te[ 7 ], n43 = te[ 11 ], n44 = te[ 15 ];\n\n\t\t//TODO: make this more efficient\n\t\t//( based on http://www.euclideanspace.com/maths/algebra/matrix/functions/inverse/fourD/index.htm )\n\n\t\treturn (\n\t\t\tn41 * (\n\t\t\t\t+ n14 * n23 * n32\n\t\t\t\t - n13 * n24 * n32\n\t\t\t\t - n14 * n22 * n33\n\t\t\t\t + n12 * n24 * n33\n\t\t\t\t + n13 * n22 * n34\n\t\t\t\t - n12 * n23 * n34\n\t\t\t) +\n\t\t\tn42 * (\n\t\t\t\t+ n11 * n23 * n34\n\t\t\t\t - n11 * n24 * n33\n\t\t\t\t + n14 * n21 * n33\n\t\t\t\t - n13 * n21 * n34\n\t\t\t\t + n13 * n24 * n31\n\t\t\t\t - n14 * n23 * n31\n\t\t\t) +\n\t\t\tn43 * (\n\t\t\t\t+ n11 * n24 * n32\n\t\t\t\t - n11 * n22 * n34\n\t\t\t\t - n14 * n21 * n32\n\t\t\t\t + n12 * n21 * n34\n\t\t\t\t + n14 * n22 * n31\n\t\t\t\t - n12 * n24 * n31\n\t\t\t) +\n\t\t\tn44 * (\n\t\t\t\t- n13 * n22 * n31\n\t\t\t\t - n11 * n23 * n32\n\t\t\t\t + n11 * n22 * n33\n\t\t\t\t + n13 * n21 * n32\n\t\t\t\t - n12 * n21 * n33\n\t\t\t\t + n12 * n23 * n31\n\t\t\t)\n\n\t\t);\n\n\t}\n\n\ttranspose() {\n\n\t\tconst te = this.elements;\n\t\tlet tmp;\n\n\t\ttmp = te[ 1 ]; te[ 1 ] = te[ 4 ]; te[ 4 ] = tmp;\n\t\ttmp = te[ 2 ]; te[ 2 ] = te[ 8 ]; te[ 8 ] = tmp;\n\t\ttmp = te[ 6 ]; te[ 6 ] = te[ 9 ]; te[ 9 ] = tmp;\n\n\t\ttmp = te[ 3 ]; te[ 3 ] = te[ 12 ]; te[ 12 ] = tmp;\n\t\ttmp = te[ 7 ]; te[ 7 ] = te[ 13 ]; te[ 13 ] = tmp;\n\t\ttmp = te[ 11 ]; te[ 11 ] = te[ 14 ]; te[ 14 ] = tmp;\n\n\t\treturn this;\n\n\t}\n\n\tsetPosition( x, y, z ) {\n\n\t\tconst te = this.elements;\n\n\t\tif ( x.isVector3 ) {\n\n\t\t\tte[ 12 ] = x.x;\n\t\t\tte[ 13 ] = x.y;\n\t\t\tte[ 14 ] = x.z;\n\n\t\t} else {\n\n\t\t\tte[ 12 ] = x;\n\t\t\tte[ 13 ] = y;\n\t\t\tte[ 14 ] = z;\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n\tinvert() {\n\n\t\t// based on http://www.euclideanspace.com/maths/algebra/matrix/functions/inverse/fourD/index.htm\n\t\tconst te = this.elements,\n\n\t\t\tn11 = te[ 0 ], n21 = te[ 1 ], n31 = te[ 2 ], n41 = te[ 3 ],\n\t\t\tn12 = te[ 4 ], n22 = te[ 5 ], n32 = te[ 6 ], n42 = te[ 7 ],\n\t\t\tn13 = te[ 8 ], n23 = te[ 9 ], n33 = te[ 10 ], n43 = te[ 11 ],\n\t\t\tn14 = te[ 12 ], n24 = te[ 13 ], n34 = te[ 14 ], n44 = te[ 15 ],\n\n\t\t\tt11 = n23 * n34 * n42 - n24 * n33 * n42 + n24 * n32 * n43 - n22 * n34 * n43 - n23 * n32 * n44 + n22 * n33 * n44,\n\t\t\tt12 = n14 * n33 * n42 - n13 * n34 * n42 - n14 * n32 * n43 + n12 * n34 * n43 + n13 * n32 * n44 - n12 * n33 * n44,\n\t\t\tt13 = n13 * n24 * n42 - n14 * n23 * n42 + n14 * n22 * n43 - n12 * n24 * n43 - n13 * n22 * n44 + n12 * n23 * n44,\n\t\t\tt14 = n14 * n23 * n32 - n13 * n24 * n32 - n14 * n22 * n33 + n12 * n24 * n33 + n13 * n22 * n34 - n12 * n23 * n34;\n\n\t\tconst det = n11 * t11 + n21 * t12 + n31 * t13 + n41 * t14;\n\n\t\tif ( det === 0 ) return this.set( 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 );\n\n\t\tconst detInv = 1 / det;\n\n\t\tte[ 0 ] = t11 * detInv;\n\t\tte[ 1 ] = ( n24 * n33 * n41 - n23 * n34 * n41 - n24 * n31 * n43 + n21 * n34 * n43 + n23 * n31 * n44 - n21 * n33 * n44 ) * detInv;\n\t\tte[ 2 ] = ( n22 * n34 * n41 - n24 * n32 * n41 + n24 * n31 * n42 - n21 * n34 * n42 - n22 * n31 * n44 + n21 * n32 * n44 ) * detInv;\n\t\tte[ 3 ] = ( n23 * n32 * n41 - n22 * n33 * n41 - n23 * n31 * n42 + n21 * n33 * n42 + n22 * n31 * n43 - n21 * n32 * n43 ) * detInv;\n\n\t\tte[ 4 ] = t12 * detInv;\n\t\tte[ 5 ] = ( n13 * n34 * n41 - n14 * n33 * n41 + n14 * n31 * n43 - n11 * n34 * n43 - n13 * n31 * n44 + n11 * n33 * n44 ) * detInv;\n\t\tte[ 6 ] = ( n14 * n32 * n41 - n12 * n34 * n41 - n14 * n31 * n42 + n11 * n34 * n42 + n12 * n31 * n44 - n11 * n32 * n44 ) * detInv;\n\t\tte[ 7 ] = ( n12 * n33 * n41 - n13 * n32 * n41 + n13 * n31 * n42 - n11 * n33 * n42 - n12 * n31 * n43 + n11 * n32 * n43 ) * detInv;\n\n\t\tte[ 8 ] = t13 * detInv;\n\t\tte[ 9 ] = ( n14 * n23 * n41 - n13 * n24 * n41 - n14 * n21 * n43 + n11 * n24 * n43 + n13 * n21 * n44 - n11 * n23 * n44 ) * detInv;\n\t\tte[ 10 ] = ( n12 * n24 * n41 - n14 * n22 * n41 + n14 * n21 * n42 - n11 * n24 * n42 - n12 * n21 * n44 + n11 * n22 * n44 ) * detInv;\n\t\tte[ 11 ] = ( n13 * n22 * n41 - n12 * n23 * n41 - n13 * n21 * n42 + n11 * n23 * n42 + n12 * n21 * n43 - n11 * n22 * n43 ) * detInv;\n\n\t\tte[ 12 ] = t14 * detInv;\n\t\tte[ 13 ] = ( n13 * n24 * n31 - n14 * n23 * n31 + n14 * n21 * n33 - n11 * n24 * n33 - n13 * n21 * n34 + n11 * n23 * n34 ) * detInv;\n\t\tte[ 14 ] = ( n14 * n22 * n31 - n12 * n24 * n31 - n14 * n21 * n32 + n11 * n24 * n32 + n12 * n21 * n34 - n11 * n22 * n34 ) * detInv;\n\t\tte[ 15 ] = ( n12 * n23 * n31 - n13 * n22 * n31 + n13 * n21 * n32 - n11 * n23 * n32 - n12 * n21 * n33 + n11 * n22 * n33 ) * detInv;\n\n\t\treturn this;\n\n\t}\n\n\tscale( v ) {\n\n\t\tconst te = this.elements;\n\t\tconst x = v.x, y = v.y, z = v.z;\n\n\t\tte[ 0 ] *= x; te[ 4 ] *= y; te[ 8 ] *= z;\n\t\tte[ 1 ] *= x; te[ 5 ] *= y; te[ 9 ] *= z;\n\t\tte[ 2 ] *= x; te[ 6 ] *= y; te[ 10 ] *= z;\n\t\tte[ 3 ] *= x; te[ 7 ] *= y; te[ 11 ] *= z;\n\n\t\treturn this;\n\n\t}\n\n\tgetMaxScaleOnAxis() {\n\n\t\tconst te = this.elements;\n\n\t\tconst scaleXSq = te[ 0 ] * te[ 0 ] + te[ 1 ] * te[ 1 ] + te[ 2 ] * te[ 2 ];\n\t\tconst scaleYSq = te[ 4 ] * te[ 4 ] + te[ 5 ] * te[ 5 ] + te[ 6 ] * te[ 6 ];\n\t\tconst scaleZSq = te[ 8 ] * te[ 8 ] + te[ 9 ] * te[ 9 ] + te[ 10 ] * te[ 10 ];\n\n\t\treturn Math.sqrt( Math.max( scaleXSq, scaleYSq, scaleZSq ) );\n\n\t}\n\n\tmakeTranslation( x, y, z ) {\n\n\t\tthis.set(\n\n\t\t\t1, 0, 0, x,\n\t\t\t0, 1, 0, y,\n\t\t\t0, 0, 1, z,\n\t\t\t0, 0, 0, 1\n\n\t\t);\n\n\t\treturn this;\n\n\t}\n\n\tmakeRotationX( theta ) {\n\n\t\tconst c = Math.cos( theta ), s = Math.sin( theta );\n\n\t\tthis.set(\n\n\t\t\t1, 0, 0, 0,\n\t\t\t0, c, - s, 0,\n\t\t\t0, s, c, 0,\n\t\t\t0, 0, 0, 1\n\n\t\t);\n\n\t\treturn this;\n\n\t}\n\n\tmakeRotationY( theta ) {\n\n\t\tconst c = Math.cos( theta ), s = Math.sin( theta );\n\n\t\tthis.set(\n\n\t\t\t c, 0, s, 0,\n\t\t\t 0, 1, 0, 0,\n\t\t\t- s, 0, c, 0,\n\t\t\t 0, 0, 0, 1\n\n\t\t);\n\n\t\treturn this;\n\n\t}\n\n\tmakeRotationZ( theta ) {\n\n\t\tconst c = Math.cos( theta ), s = Math.sin( theta );\n\n\t\tthis.set(\n\n\t\t\tc, - s, 0, 0,\n\t\t\ts, c, 0, 0,\n\t\t\t0, 0, 1, 0,\n\t\t\t0, 0, 0, 1\n\n\t\t);\n\n\t\treturn this;\n\n\t}\n\n\tmakeRotationAxis( axis, angle ) {\n\n\t\t// Based on http://www.gamedev.net/reference/articles/article1199.asp\n\n\t\tconst c = Math.cos( angle );\n\t\tconst s = Math.sin( angle );\n\t\tconst t = 1 - c;\n\t\tconst x = axis.x, y = axis.y, z = axis.z;\n\t\tconst tx = t * x, ty = t * y;\n\n\t\tthis.set(\n\n\t\t\ttx * x + c, tx * y - s * z, tx * z + s * y, 0,\n\t\t\ttx * y + s * z, ty * y + c, ty * z - s * x, 0,\n\t\t\ttx * z - s * y, ty * z + s * x, t * z * z + c, 0,\n\t\t\t0, 0, 0, 1\n\n\t\t);\n\n\t\treturn this;\n\n\t}\n\n\tmakeScale( x, y, z ) {\n\n\t\tthis.set(\n\n\t\t\tx, 0, 0, 0,\n\t\t\t0, y, 0, 0,\n\t\t\t0, 0, z, 0,\n\t\t\t0, 0, 0, 1\n\n\t\t);\n\n\t\treturn this;\n\n\t}\n\n\tmakeShear( x, y, z ) {\n\n\t\tthis.set(\n\n\t\t\t1, y, z, 0,\n\t\t\tx, 1, z, 0,\n\t\t\tx, y, 1, 0,\n\t\t\t0, 0, 0, 1\n\n\t\t);\n\n\t\treturn this;\n\n\t}\n\n\tcompose( position, quaternion, scale ) {\n\n\t\tconst te = this.elements;\n\n\t\tconst x = quaternion._x, y = quaternion._y, z = quaternion._z, w = quaternion._w;\n\t\tconst x2 = x + x,\ty2 = y + y, z2 = z + z;\n\t\tconst xx = x * x2, xy = x * y2, xz = x * z2;\n\t\tconst yy = y * y2, yz = y * z2, zz = z * z2;\n\t\tconst wx = w * x2, wy = w * y2, wz = w * z2;\n\n\t\tconst sx = scale.x, sy = scale.y, sz = scale.z;\n\n\t\tte[ 0 ] = ( 1 - ( yy + zz ) ) * sx;\n\t\tte[ 1 ] = ( xy + wz ) * sx;\n\t\tte[ 2 ] = ( xz - wy ) * sx;\n\t\tte[ 3 ] = 0;\n\n\t\tte[ 4 ] = ( xy - wz ) * sy;\n\t\tte[ 5 ] = ( 1 - ( xx + zz ) ) * sy;\n\t\tte[ 6 ] = ( yz + wx ) * sy;\n\t\tte[ 7 ] = 0;\n\n\t\tte[ 8 ] = ( xz + wy ) * sz;\n\t\tte[ 9 ] = ( yz - wx ) * sz;\n\t\tte[ 10 ] = ( 1 - ( xx + yy ) ) * sz;\n\t\tte[ 11 ] = 0;\n\n\t\tte[ 12 ] = position.x;\n\t\tte[ 13 ] = position.y;\n\t\tte[ 14 ] = position.z;\n\t\tte[ 15 ] = 1;\n\n\t\treturn this;\n\n\t}\n\n\tdecompose( position, quaternion, scale ) {\n\n\t\tconst te = this.elements;\n\n\t\tlet sx = _v1$1.set( te[ 0 ], te[ 1 ], te[ 2 ] ).length();\n\t\tconst sy = _v1$1.set( te[ 4 ], te[ 5 ], te[ 6 ] ).length();\n\t\tconst sz = _v1$1.set( te[ 8 ], te[ 9 ], te[ 10 ] ).length();\n\n\t\t// if determine is negative, we need to invert one scale\n\t\tconst det = this.determinant();\n\t\tif ( det < 0 ) sx = - sx;\n\n\t\tposition.x = te[ 12 ];\n\t\tposition.y = te[ 13 ];\n\t\tposition.z = te[ 14 ];\n\n\t\t// scale the rotation part\n\t\t_m1.copy( this );\n\n\t\tconst invSX = 1 / sx;\n\t\tconst invSY = 1 / sy;\n\t\tconst invSZ = 1 / sz;\n\n\t\t_m1.elements[ 0 ] *= invSX;\n\t\t_m1.elements[ 1 ] *= invSX;\n\t\t_m1.elements[ 2 ] *= invSX;\n\n\t\t_m1.elements[ 4 ] *= invSY;\n\t\t_m1.elements[ 5 ] *= invSY;\n\t\t_m1.elements[ 6 ] *= invSY;\n\n\t\t_m1.elements[ 8 ] *= invSZ;\n\t\t_m1.elements[ 9 ] *= invSZ;\n\t\t_m1.elements[ 10 ] *= invSZ;\n\n\t\tquaternion.setFromRotationMatrix( _m1 );\n\n\t\tscale.x = sx;\n\t\tscale.y = sy;\n\t\tscale.z = sz;\n\n\t\treturn this;\n\n\t}\n\n\tmakePerspective( left, right, top, bottom, near, far ) {\n\n\t\tif ( far === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Matrix4: .makePerspective() has been redefined and has a new signature. Please check the docs.' );\n\n\t\t}\n\n\t\tconst te = this.elements;\n\t\tconst x = 2 * near / ( right - left );\n\t\tconst y = 2 * near / ( top - bottom );\n\n\t\tconst a = ( right + left ) / ( right - left );\n\t\tconst b = ( top + bottom ) / ( top - bottom );\n\t\tconst c = - ( far + near ) / ( far - near );\n\t\tconst d = - 2 * far * near / ( far - near );\n\n\t\tte[ 0 ] = x;\tte[ 4 ] = 0;\tte[ 8 ] = a;\tte[ 12 ] = 0;\n\t\tte[ 1 ] = 0;\tte[ 5 ] = y;\tte[ 9 ] = b;\tte[ 13 ] = 0;\n\t\tte[ 2 ] = 0;\tte[ 6 ] = 0;\tte[ 10 ] = c;\tte[ 14 ] = d;\n\t\tte[ 3 ] = 0;\tte[ 7 ] = 0;\tte[ 11 ] = - 1;\tte[ 15 ] = 0;\n\n\t\treturn this;\n\n\t}\n\n\tmakeOrthographic( left, right, top, bottom, near, far ) {\n\n\t\tconst te = this.elements;\n\t\tconst w = 1.0 / ( right - left );\n\t\tconst h = 1.0 / ( top - bottom );\n\t\tconst p = 1.0 / ( far - near );\n\n\t\tconst x = ( right + left ) * w;\n\t\tconst y = ( top + bottom ) * h;\n\t\tconst z = ( far + near ) * p;\n\n\t\tte[ 0 ] = 2 * w;\tte[ 4 ] = 0;\tte[ 8 ] = 0;\tte[ 12 ] = - x;\n\t\tte[ 1 ] = 0;\tte[ 5 ] = 2 * h;\tte[ 9 ] = 0;\tte[ 13 ] = - y;\n\t\tte[ 2 ] = 0;\tte[ 6 ] = 0;\tte[ 10 ] = - 2 * p;\tte[ 14 ] = - z;\n\t\tte[ 3 ] = 0;\tte[ 7 ] = 0;\tte[ 11 ] = 0;\tte[ 15 ] = 1;\n\n\t\treturn this;\n\n\t}\n\n\tequals( matrix ) {\n\n\t\tconst te = this.elements;\n\t\tconst me = matrix.elements;\n\n\t\tfor ( let i = 0; i < 16; i ++ ) {\n\n\t\t\tif ( te[ i ] !== me[ i ] ) return false;\n\n\t\t}\n\n\t\treturn true;\n\n\t}\n\n\tfromArray( array, offset = 0 ) {\n\n\t\tfor ( let i = 0; i < 16; i ++ ) {\n\n\t\t\tthis.elements[ i ] = array[ i + offset ];\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n\ttoArray( array = [], offset = 0 ) {\n\n\t\tconst te = this.elements;\n\n\t\tarray[ offset ] = te[ 0 ];\n\t\tarray[ offset + 1 ] = te[ 1 ];\n\t\tarray[ offset + 2 ] = te[ 2 ];\n\t\tarray[ offset + 3 ] = te[ 3 ];\n\n\t\tarray[ offset + 4 ] = te[ 4 ];\n\t\tarray[ offset + 5 ] = te[ 5 ];\n\t\tarray[ offset + 6 ] = te[ 6 ];\n\t\tarray[ offset + 7 ] = te[ 7 ];\n\n\t\tarray[ offset + 8 ] = te[ 8 ];\n\t\tarray[ offset + 9 ] = te[ 9 ];\n\t\tarray[ offset + 10 ] = te[ 10 ];\n\t\tarray[ offset + 11 ] = te[ 11 ];\n\n\t\tarray[ offset + 12 ] = te[ 12 ];\n\t\tarray[ offset + 13 ] = te[ 13 ];\n\t\tarray[ offset + 14 ] = te[ 14 ];\n\t\tarray[ offset + 15 ] = te[ 15 ];\n\n\t\treturn array;\n\n\t}\n\n}\n\nconst _v1$1 = /*@__PURE__*/ new Vector3();\nconst _m1 = /*@__PURE__*/ new Matrix4();\nconst _zero = /*@__PURE__*/ new Vector3( 0, 0, 0 );\nconst _one = /*@__PURE__*/ new Vector3( 1, 1, 1 );\nconst _x = /*@__PURE__*/ new Vector3();\nconst _y = /*@__PURE__*/ new Vector3();\nconst _z = /*@__PURE__*/ new Vector3();\n\nclass Euler {\n\n\tconstructor( x = 0, y = 0, z = 0, order = Euler.DefaultOrder ) {\n\n\t\tObject.defineProperty( this, 'isEuler', { value: true } );\n\n\t\tthis._x = x;\n\t\tthis._y = y;\n\t\tthis._z = z;\n\t\tthis._order = order;\n\n\t}\n\n\tget x() {\n\n\t\treturn this._x;\n\n\t}\n\n\tset x( value ) {\n\n\t\tthis._x = value;\n\t\tthis._onChangeCallback();\n\n\t}\n\n\tget y() {\n\n\t\treturn this._y;\n\n\t}\n\n\tset y( value ) {\n\n\t\tthis._y = value;\n\t\tthis._onChangeCallback();\n\n\t}\n\n\tget z() {\n\n\t\treturn this._z;\n\n\t}\n\n\tset z( value ) {\n\n\t\tthis._z = value;\n\t\tthis._onChangeCallback();\n\n\t}\n\n\tget order() {\n\n\t\treturn this._order;\n\n\t}\n\n\tset order( value ) {\n\n\t\tthis._order = value;\n\t\tthis._onChangeCallback();\n\n\t}\n\n\tset( x, y, z, order ) {\n\n\t\tthis._x = x;\n\t\tthis._y = y;\n\t\tthis._z = z;\n\t\tthis._order = order || this._order;\n\n\t\tthis._onChangeCallback();\n\n\t\treturn this;\n\n\t}\n\n\tclone() {\n\n\t\treturn new this.constructor( this._x, this._y, this._z, this._order );\n\n\t}\n\n\tcopy( euler ) {\n\n\t\tthis._x = euler._x;\n\t\tthis._y = euler._y;\n\t\tthis._z = euler._z;\n\t\tthis._order = euler._order;\n\n\t\tthis._onChangeCallback();\n\n\t\treturn this;\n\n\t}\n\n\tsetFromRotationMatrix( m, order, update ) {\n\n\t\tconst clamp = MathUtils.clamp;\n\n\t\t// assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)\n\n\t\tconst te = m.elements;\n\t\tconst m11 = te[ 0 ], m12 = te[ 4 ], m13 = te[ 8 ];\n\t\tconst m21 = te[ 1 ], m22 = te[ 5 ], m23 = te[ 9 ];\n\t\tconst m31 = te[ 2 ], m32 = te[ 6 ], m33 = te[ 10 ];\n\n\t\torder = order || this._order;\n\n\t\tswitch ( order ) {\n\n\t\t\tcase 'XYZ':\n\n\t\t\t\tthis._y = Math.asin( clamp( m13, - 1, 1 ) );\n\n\t\t\t\tif ( Math.abs( m13 ) < 0.9999999 ) {\n\n\t\t\t\t\tthis._x = Math.atan2( - m23, m33 );\n\t\t\t\t\tthis._z = Math.atan2( - m12, m11 );\n\n\t\t\t\t} else {\n\n\t\t\t\t\tthis._x = Math.atan2( m32, m22 );\n\t\t\t\t\tthis._z = 0;\n\n\t\t\t\t}\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'YXZ':\n\n\t\t\t\tthis._x = Math.asin( - clamp( m23, - 1, 1 ) );\n\n\t\t\t\tif ( Math.abs( m23 ) < 0.9999999 ) {\n\n\t\t\t\t\tthis._y = Math.atan2( m13, m33 );\n\t\t\t\t\tthis._z = Math.atan2( m21, m22 );\n\n\t\t\t\t} else {\n\n\t\t\t\t\tthis._y = Math.atan2( - m31, m11 );\n\t\t\t\t\tthis._z = 0;\n\n\t\t\t\t}\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'ZXY':\n\n\t\t\t\tthis._x = Math.asin( clamp( m32, - 1, 1 ) );\n\n\t\t\t\tif ( Math.abs( m32 ) < 0.9999999 ) {\n\n\t\t\t\t\tthis._y = Math.atan2( - m31, m33 );\n\t\t\t\t\tthis._z = Math.atan2( - m12, m22 );\n\n\t\t\t\t} else {\n\n\t\t\t\t\tthis._y = 0;\n\t\t\t\t\tthis._z = Math.atan2( m21, m11 );\n\n\t\t\t\t}\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'ZYX':\n\n\t\t\t\tthis._y = Math.asin( - clamp( m31, - 1, 1 ) );\n\n\t\t\t\tif ( Math.abs( m31 ) < 0.9999999 ) {\n\n\t\t\t\t\tthis._x = Math.atan2( m32, m33 );\n\t\t\t\t\tthis._z = Math.atan2( m21, m11 );\n\n\t\t\t\t} else {\n\n\t\t\t\t\tthis._x = 0;\n\t\t\t\t\tthis._z = Math.atan2( - m12, m22 );\n\n\t\t\t\t}\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'YZX':\n\n\t\t\t\tthis._z = Math.asin( clamp( m21, - 1, 1 ) );\n\n\t\t\t\tif ( Math.abs( m21 ) < 0.9999999 ) {\n\n\t\t\t\t\tthis._x = Math.atan2( - m23, m22 );\n\t\t\t\t\tthis._y = Math.atan2( - m31, m11 );\n\n\t\t\t\t} else {\n\n\t\t\t\t\tthis._x = 0;\n\t\t\t\t\tthis._y = Math.atan2( m13, m33 );\n\n\t\t\t\t}\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'XZY':\n\n\t\t\t\tthis._z = Math.asin( - clamp( m12, - 1, 1 ) );\n\n\t\t\t\tif ( Math.abs( m12 ) < 0.9999999 ) {\n\n\t\t\t\t\tthis._x = Math.atan2( m32, m22 );\n\t\t\t\t\tthis._y = Math.atan2( m13, m11 );\n\n\t\t\t\t} else {\n\n\t\t\t\t\tthis._x = Math.atan2( - m23, m33 );\n\t\t\t\t\tthis._y = 0;\n\n\t\t\t\t}\n\n\t\t\t\tbreak;\n\n\t\t\tdefault:\n\n\t\t\t\tconsole.warn( 'THREE.Euler: .setFromRotationMatrix() encountered an unknown order: ' + order );\n\n\t\t}\n\n\t\tthis._order = order;\n\n\t\tif ( update !== false ) this._onChangeCallback();\n\n\t\treturn this;\n\n\t}\n\n\tsetFromQuaternion( q, order, update ) {\n\n\t\t_matrix.makeRotationFromQuaternion( q );\n\n\t\treturn this.setFromRotationMatrix( _matrix, order, update );\n\n\t}\n\n\tsetFromVector3( v, order ) {\n\n\t\treturn this.set( v.x, v.y, v.z, order || this._order );\n\n\t}\n\n\treorder( newOrder ) {\n\n\t\t// WARNING: this discards revolution information -bhouston\n\n\t\t_quaternion$1.setFromEuler( this );\n\n\t\treturn this.setFromQuaternion( _quaternion$1, newOrder );\n\n\t}\n\n\tequals( euler ) {\n\n\t\treturn ( euler._x === this._x ) && ( euler._y === this._y ) && ( euler._z === this._z ) && ( euler._order === this._order );\n\n\t}\n\n\tfromArray( array ) {\n\n\t\tthis._x = array[ 0 ];\n\t\tthis._y = array[ 1 ];\n\t\tthis._z = array[ 2 ];\n\t\tif ( array[ 3 ] !== undefined ) this._order = array[ 3 ];\n\n\t\tthis._onChangeCallback();\n\n\t\treturn this;\n\n\t}\n\n\ttoArray( array = [], offset = 0 ) {\n\n\t\tarray[ offset ] = this._x;\n\t\tarray[ offset + 1 ] = this._y;\n\t\tarray[ offset + 2 ] = this._z;\n\t\tarray[ offset + 3 ] = this._order;\n\n\t\treturn array;\n\n\t}\n\n\ttoVector3( optionalResult ) {\n\n\t\tif ( optionalResult ) {\n\n\t\t\treturn optionalResult.set( this._x, this._y, this._z );\n\n\t\t} else {\n\n\t\t\treturn new Vector3( this._x, this._y, this._z );\n\n\t\t}\n\n\t}\n\n\t_onChange( callback ) {\n\n\t\tthis._onChangeCallback = callback;\n\n\t\treturn this;\n\n\t}\n\n\t_onChangeCallback() {}\n\n}\n\nEuler.DefaultOrder = 'XYZ';\nEuler.RotationOrders = [ 'XYZ', 'YZX', 'ZXY', 'XZY', 'YXZ', 'ZYX' ];\n\nconst _matrix = /*@__PURE__*/ new Matrix4();\nconst _quaternion$1 = /*@__PURE__*/ new Quaternion();\n\nclass Layers {\n\n\tconstructor() {\n\n\t\tthis.mask = 1 | 0;\n\n\t}\n\n\tset( channel ) {\n\n\t\tthis.mask = 1 << channel | 0;\n\n\t}\n\n\tenable( channel ) {\n\n\t\tthis.mask |= 1 << channel | 0;\n\n\t}\n\n\tenableAll() {\n\n\t\tthis.mask = 0xffffffff | 0;\n\n\t}\n\n\ttoggle( channel ) {\n\n\t\tthis.mask ^= 1 << channel | 0;\n\n\t}\n\n\tdisable( channel ) {\n\n\t\tthis.mask &= ~ ( 1 << channel | 0 );\n\n\t}\n\n\tdisableAll() {\n\n\t\tthis.mask = 0;\n\n\t}\n\n\ttest( layers ) {\n\n\t\treturn ( this.mask & layers.mask ) !== 0;\n\n\t}\n\n}\n\nlet _object3DId = 0;\n\nconst _v1$2 = new Vector3();\nconst _q1 = new Quaternion();\nconst _m1$1 = new Matrix4();\nconst _target = new Vector3();\n\nconst _position = new Vector3();\nconst _scale = new Vector3();\nconst _quaternion$2 = new Quaternion();\n\nconst _xAxis = new Vector3( 1, 0, 0 );\nconst _yAxis = new Vector3( 0, 1, 0 );\nconst _zAxis = new Vector3( 0, 0, 1 );\n\nconst _addedEvent = { type: 'added' };\nconst _removedEvent = { type: 'removed' };\n\nfunction Object3D() {\n\n\tObject.defineProperty( this, 'id', { value: _object3DId ++ } );\n\n\tthis.uuid = MathUtils.generateUUID();\n\n\tthis.name = '';\n\tthis.type = 'Object3D';\n\n\tthis.parent = null;\n\tthis.children = [];\n\n\tthis.up = Object3D.DefaultUp.clone();\n\n\tconst position = new Vector3();\n\tconst rotation = new Euler();\n\tconst quaternion = new Quaternion();\n\tconst scale = new Vector3( 1, 1, 1 );\n\n\tfunction onRotationChange() {\n\n\t\tquaternion.setFromEuler( rotation, false );\n\n\t}\n\n\tfunction onQuaternionChange() {\n\n\t\trotation.setFromQuaternion( quaternion, undefined, false );\n\n\t}\n\n\trotation._onChange( onRotationChange );\n\tquaternion._onChange( onQuaternionChange );\n\n\tObject.defineProperties( this, {\n\t\tposition: {\n\t\t\tconfigurable: true,\n\t\t\tenumerable: true,\n\t\t\tvalue: position\n\t\t},\n\t\trotation: {\n\t\t\tconfigurable: true,\n\t\t\tenumerable: true,\n\t\t\tvalue: rotation\n\t\t},\n\t\tquaternion: {\n\t\t\tconfigurable: true,\n\t\t\tenumerable: true,\n\t\t\tvalue: quaternion\n\t\t},\n\t\tscale: {\n\t\t\tconfigurable: true,\n\t\t\tenumerable: true,\n\t\t\tvalue: scale\n\t\t},\n\t\tmodelViewMatrix: {\n\t\t\tvalue: new Matrix4()\n\t\t},\n\t\tnormalMatrix: {\n\t\t\tvalue: new Matrix3()\n\t\t}\n\t} );\n\n\tthis.matrix = new Matrix4();\n\tthis.matrixWorld = new Matrix4();\n\n\tthis.matrixAutoUpdate = Object3D.DefaultMatrixAutoUpdate;\n\tthis.matrixWorldNeedsUpdate = false;\n\n\tthis.layers = new Layers();\n\tthis.visible = true;\n\n\tthis.castShadow = false;\n\tthis.receiveShadow = false;\n\n\tthis.frustumCulled = true;\n\tthis.renderOrder = 0;\n\n\tthis.animations = [];\n\n\tthis.userData = {};\n\n}\n\nObject3D.DefaultUp = new Vector3( 0, 1, 0 );\nObject3D.DefaultMatrixAutoUpdate = true;\n\nObject3D.prototype = Object.assign( Object.create( EventDispatcher.prototype ), {\n\n\tconstructor: Object3D,\n\n\tisObject3D: true,\n\n\tonBeforeRender: function () {},\n\tonAfterRender: function () {},\n\n\tapplyMatrix4: function ( matrix ) {\n\n\t\tif ( this.matrixAutoUpdate ) this.updateMatrix();\n\n\t\tthis.matrix.premultiply( matrix );\n\n\t\tthis.matrix.decompose( this.position, this.quaternion, this.scale );\n\n\t},\n\n\tapplyQuaternion: function ( q ) {\n\n\t\tthis.quaternion.premultiply( q );\n\n\t\treturn this;\n\n\t},\n\n\tsetRotationFromAxisAngle: function ( axis, angle ) {\n\n\t\t// assumes axis is normalized\n\n\t\tthis.quaternion.setFromAxisAngle( axis, angle );\n\n\t},\n\n\tsetRotationFromEuler: function ( euler ) {\n\n\t\tthis.quaternion.setFromEuler( euler, true );\n\n\t},\n\n\tsetRotationFromMatrix: function ( m ) {\n\n\t\t// assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)\n\n\t\tthis.quaternion.setFromRotationMatrix( m );\n\n\t},\n\n\tsetRotationFromQuaternion: function ( q ) {\n\n\t\t// assumes q is normalized\n\n\t\tthis.quaternion.copy( q );\n\n\t},\n\n\trotateOnAxis: function ( axis, angle ) {\n\n\t\t// rotate object on axis in object space\n\t\t// axis is assumed to be normalized\n\n\t\t_q1.setFromAxisAngle( axis, angle );\n\n\t\tthis.quaternion.multiply( _q1 );\n\n\t\treturn this;\n\n\t},\n\n\trotateOnWorldAxis: function ( axis, angle ) {\n\n\t\t// rotate object on axis in world space\n\t\t// axis is assumed to be normalized\n\t\t// method assumes no rotated parent\n\n\t\t_q1.setFromAxisAngle( axis, angle );\n\n\t\tthis.quaternion.premultiply( _q1 );\n\n\t\treturn this;\n\n\t},\n\n\trotateX: function ( angle ) {\n\n\t\treturn this.rotateOnAxis( _xAxis, angle );\n\n\t},\n\n\trotateY: function ( angle ) {\n\n\t\treturn this.rotateOnAxis( _yAxis, angle );\n\n\t},\n\n\trotateZ: function ( angle ) {\n\n\t\treturn this.rotateOnAxis( _zAxis, angle );\n\n\t},\n\n\ttranslateOnAxis: function ( axis, distance ) {\n\n\t\t// translate object by distance along axis in object space\n\t\t// axis is assumed to be normalized\n\n\t\t_v1$2.copy( axis ).applyQuaternion( this.quaternion );\n\n\t\tthis.position.add( _v1$2.multiplyScalar( distance ) );\n\n\t\treturn this;\n\n\t},\n\n\ttranslateX: function ( distance ) {\n\n\t\treturn this.translateOnAxis( _xAxis, distance );\n\n\t},\n\n\ttranslateY: function ( distance ) {\n\n\t\treturn this.translateOnAxis( _yAxis, distance );\n\n\t},\n\n\ttranslateZ: function ( distance ) {\n\n\t\treturn this.translateOnAxis( _zAxis, distance );\n\n\t},\n\n\tlocalToWorld: function ( vector ) {\n\n\t\treturn vector.applyMatrix4( this.matrixWorld );\n\n\t},\n\n\tworldToLocal: function ( vector ) {\n\n\t\treturn vector.applyMatrix4( _m1$1.copy( this.matrixWorld ).invert() );\n\n\t},\n\n\tlookAt: function ( x, y, z ) {\n\n\t\t// This method does not support objects having non-uniformly-scaled parent(s)\n\n\t\tif ( x.isVector3 ) {\n\n\t\t\t_target.copy( x );\n\n\t\t} else {\n\n\t\t\t_target.set( x, y, z );\n\n\t\t}\n\n\t\tconst parent = this.parent;\n\n\t\tthis.updateWorldMatrix( true, false );\n\n\t\t_position.setFromMatrixPosition( this.matrixWorld );\n\n\t\tif ( this.isCamera || this.isLight ) {\n\n\t\t\t_m1$1.lookAt( _position, _target, this.up );\n\n\t\t} else {\n\n\t\t\t_m1$1.lookAt( _target, _position, this.up );\n\n\t\t}\n\n\t\tthis.quaternion.setFromRotationMatrix( _m1$1 );\n\n\t\tif ( parent ) {\n\n\t\t\t_m1$1.extractRotation( parent.matrixWorld );\n\t\t\t_q1.setFromRotationMatrix( _m1$1 );\n\t\t\tthis.quaternion.premultiply( _q1.invert() );\n\n\t\t}\n\n\t},\n\n\tadd: function ( object ) {\n\n\t\tif ( arguments.length > 1 ) {\n\n\t\t\tfor ( let i = 0; i < arguments.length; i ++ ) {\n\n\t\t\t\tthis.add( arguments[ i ] );\n\n\t\t\t}\n\n\t\t\treturn this;\n\n\t\t}\n\n\t\tif ( object === this ) {\n\n\t\t\tconsole.error( 'THREE.Object3D.add: object can\\'t be added as a child of itself.', object );\n\t\t\treturn this;\n\n\t\t}\n\n\t\tif ( object && object.isObject3D ) {\n\n\t\t\tif ( object.parent !== null ) {\n\n\t\t\t\tobject.parent.remove( object );\n\n\t\t\t}\n\n\t\t\tobject.parent = this;\n\t\t\tthis.children.push( object );\n\n\t\t\tobject.dispatchEvent( _addedEvent );\n\n\t\t} else {\n\n\t\t\tconsole.error( 'THREE.Object3D.add: object not an instance of THREE.Object3D.', object );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tremove: function ( object ) {\n\n\t\tif ( arguments.length > 1 ) {\n\n\t\t\tfor ( let i = 0; i < arguments.length; i ++ ) {\n\n\t\t\t\tthis.remove( arguments[ i ] );\n\n\t\t\t}\n\n\t\t\treturn this;\n\n\t\t}\n\n\t\tconst index = this.children.indexOf( object );\n\n\t\tif ( index !== - 1 ) {\n\n\t\t\tobject.parent = null;\n\t\t\tthis.children.splice( index, 1 );\n\n\t\t\tobject.dispatchEvent( _removedEvent );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tclear: function () {\n\n\t\tfor ( let i = 0; i < this.children.length; i ++ ) {\n\n\t\t\tconst object = this.children[ i ];\n\n\t\t\tobject.parent = null;\n\n\t\t\tobject.dispatchEvent( _removedEvent );\n\n\t\t}\n\n\t\tthis.children.length = 0;\n\n\t\treturn this;\n\n\n\t},\n\n\tattach: function ( object ) {\n\n\t\t// adds object as a child of this, while maintaining the object's world transform\n\n\t\tthis.updateWorldMatrix( true, false );\n\n\t\t_m1$1.copy( this.matrixWorld ).invert();\n\n\t\tif ( object.parent !== null ) {\n\n\t\t\tobject.parent.updateWorldMatrix( true, false );\n\n\t\t\t_m1$1.multiply( object.parent.matrixWorld );\n\n\t\t}\n\n\t\tobject.applyMatrix4( _m1$1 );\n\n\t\tobject.updateWorldMatrix( false, false );\n\n\t\tthis.add( object );\n\n\t\treturn this;\n\n\t},\n\n\tgetObjectById: function ( id ) {\n\n\t\treturn this.getObjectByProperty( 'id', id );\n\n\t},\n\n\tgetObjectByName: function ( name ) {\n\n\t\treturn this.getObjectByProperty( 'name', name );\n\n\t},\n\n\tgetObjectByProperty: function ( name, value ) {\n\n\t\tif ( this[ name ] === value ) return this;\n\n\t\tfor ( let i = 0, l = this.children.length; i < l; i ++ ) {\n\n\t\t\tconst child = this.children[ i ];\n\t\t\tconst object = child.getObjectByProperty( name, value );\n\n\t\t\tif ( object !== undefined ) {\n\n\t\t\t\treturn object;\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn undefined;\n\n\t},\n\n\tgetWorldPosition: function ( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Object3D: .getWorldPosition() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\tthis.updateWorldMatrix( true, false );\n\n\t\treturn target.setFromMatrixPosition( this.matrixWorld );\n\n\t},\n\n\tgetWorldQuaternion: function ( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Object3D: .getWorldQuaternion() target is now required' );\n\t\t\ttarget = new Quaternion();\n\n\t\t}\n\n\t\tthis.updateWorldMatrix( true, false );\n\n\t\tthis.matrixWorld.decompose( _position, target, _scale );\n\n\t\treturn target;\n\n\t},\n\n\tgetWorldScale: function ( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Object3D: .getWorldScale() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\tthis.updateWorldMatrix( true, false );\n\n\t\tthis.matrixWorld.decompose( _position, _quaternion$2, target );\n\n\t\treturn target;\n\n\t},\n\n\tgetWorldDirection: function ( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Object3D: .getWorldDirection() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\tthis.updateWorldMatrix( true, false );\n\n\t\tconst e = this.matrixWorld.elements;\n\n\t\treturn target.set( e[ 8 ], e[ 9 ], e[ 10 ] ).normalize();\n\n\t},\n\n\traycast: function () {},\n\n\ttraverse: function ( callback ) {\n\n\t\tcallback( this );\n\n\t\tconst children = this.children;\n\n\t\tfor ( let i = 0, l = children.length; i < l; i ++ ) {\n\n\t\t\tchildren[ i ].traverse( callback );\n\n\t\t}\n\n\t},\n\n\ttraverseVisible: function ( callback ) {\n\n\t\tif ( this.visible === false ) return;\n\n\t\tcallback( this );\n\n\t\tconst children = this.children;\n\n\t\tfor ( let i = 0, l = children.length; i < l; i ++ ) {\n\n\t\t\tchildren[ i ].traverseVisible( callback );\n\n\t\t}\n\n\t},\n\n\ttraverseAncestors: function ( callback ) {\n\n\t\tconst parent = this.parent;\n\n\t\tif ( parent !== null ) {\n\n\t\t\tcallback( parent );\n\n\t\t\tparent.traverseAncestors( callback );\n\n\t\t}\n\n\t},\n\n\tupdateMatrix: function () {\n\n\t\tthis.matrix.compose( this.position, this.quaternion, this.scale );\n\n\t\tthis.matrixWorldNeedsUpdate = true;\n\n\t},\n\n\tupdateMatrixWorld: function ( force ) {\n\n\t\tif ( this.matrixAutoUpdate ) this.updateMatrix();\n\n\t\tif ( this.matrixWorldNeedsUpdate || force ) {\n\n\t\t\tif ( this.parent === null ) {\n\n\t\t\t\tthis.matrixWorld.copy( this.matrix );\n\n\t\t\t} else {\n\n\t\t\t\tthis.matrixWorld.multiplyMatrices( this.parent.matrixWorld, this.matrix );\n\n\t\t\t}\n\n\t\t\tthis.matrixWorldNeedsUpdate = false;\n\n\t\t\tforce = true;\n\n\t\t}\n\n\t\t// update children\n\n\t\tconst children = this.children;\n\n\t\tfor ( let i = 0, l = children.length; i < l; i ++ ) {\n\n\t\t\tchildren[ i ].updateMatrixWorld( force );\n\n\t\t}\n\n\t},\n\n\tupdateWorldMatrix: function ( updateParents, updateChildren ) {\n\n\t\tconst parent = this.parent;\n\n\t\tif ( updateParents === true && parent !== null ) {\n\n\t\t\tparent.updateWorldMatrix( true, false );\n\n\t\t}\n\n\t\tif ( this.matrixAutoUpdate ) this.updateMatrix();\n\n\t\tif ( this.parent === null ) {\n\n\t\t\tthis.matrixWorld.copy( this.matrix );\n\n\t\t} else {\n\n\t\t\tthis.matrixWorld.multiplyMatrices( this.parent.matrixWorld, this.matrix );\n\n\t\t}\n\n\t\t// update children\n\n\t\tif ( updateChildren === true ) {\n\n\t\t\tconst children = this.children;\n\n\t\t\tfor ( let i = 0, l = children.length; i < l; i ++ ) {\n\n\t\t\t\tchildren[ i ].updateWorldMatrix( false, true );\n\n\t\t\t}\n\n\t\t}\n\n\t},\n\n\ttoJSON: function ( meta ) {\n\n\t\t// meta is a string when called from JSON.stringify\n\t\tconst isRootObject = ( meta === undefined || typeof meta === 'string' );\n\n\t\tconst output = {};\n\n\t\t// meta is a hash used to collect geometries, materials.\n\t\t// not providing it implies that this is the root object\n\t\t// being serialized.\n\t\tif ( isRootObject ) {\n\n\t\t\t// initialize meta obj\n\t\t\tmeta = {\n\t\t\t\tgeometries: {},\n\t\t\t\tmaterials: {},\n\t\t\t\ttextures: {},\n\t\t\t\timages: {},\n\t\t\t\tshapes: {},\n\t\t\t\tskeletons: {},\n\t\t\t\tanimations: {}\n\t\t\t};\n\n\t\t\toutput.metadata = {\n\t\t\t\tversion: 4.5,\n\t\t\t\ttype: 'Object',\n\t\t\t\tgenerator: 'Object3D.toJSON'\n\t\t\t};\n\n\t\t}\n\n\t\t// standard Object3D serialization\n\n\t\tconst object = {};\n\n\t\tobject.uuid = this.uuid;\n\t\tobject.type = this.type;\n\n\t\tif ( this.name !== '' ) object.name = this.name;\n\t\tif ( this.castShadow === true ) object.castShadow = true;\n\t\tif ( this.receiveShadow === true ) object.receiveShadow = true;\n\t\tif ( this.visible === false ) object.visible = false;\n\t\tif ( this.frustumCulled === false ) object.frustumCulled = false;\n\t\tif ( this.renderOrder !== 0 ) object.renderOrder = this.renderOrder;\n\t\tif ( JSON.stringify( this.userData ) !== '{}' ) object.userData = this.userData;\n\n\t\tobject.layers = this.layers.mask;\n\t\tobject.matrix = this.matrix.toArray();\n\n\t\tif ( this.matrixAutoUpdate === false ) object.matrixAutoUpdate = false;\n\n\t\t// object specific properties\n\n\t\tif ( this.isInstancedMesh ) {\n\n\t\t\tobject.type = 'InstancedMesh';\n\t\t\tobject.count = this.count;\n\t\t\tobject.instanceMatrix = this.instanceMatrix.toJSON();\n\n\t\t}\n\n\t\t//\n\n\t\tfunction serialize( library, element ) {\n\n\t\t\tif ( library[ element.uuid ] === undefined ) {\n\n\t\t\t\tlibrary[ element.uuid ] = element.toJSON( meta );\n\n\t\t\t}\n\n\t\t\treturn element.uuid;\n\n\t\t}\n\n\t\tif ( this.isMesh || this.isLine || this.isPoints ) {\n\n\t\t\tobject.geometry = serialize( meta.geometries, this.geometry );\n\n\t\t\tconst parameters = this.geometry.parameters;\n\n\t\t\tif ( parameters !== undefined && parameters.shapes !== undefined ) {\n\n\t\t\t\tconst shapes = parameters.shapes;\n\n\t\t\t\tif ( Array.isArray( shapes ) ) {\n\n\t\t\t\t\tfor ( let i = 0, l = shapes.length; i < l; i ++ ) {\n\n\t\t\t\t\t\tconst shape = shapes[ i ];\n\n\t\t\t\t\t\tserialize( meta.shapes, shape );\n\n\t\t\t\t\t}\n\n\t\t\t\t} else {\n\n\t\t\t\t\tserialize( meta.shapes, shapes );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( this.isSkinnedMesh ) {\n\n\t\t\tobject.bindMode = this.bindMode;\n\t\t\tobject.bindMatrix = this.bindMatrix.toArray();\n\n\t\t\tif ( this.skeleton !== undefined ) {\n\n\t\t\t\tserialize( meta.skeletons, this.skeleton );\n\n\t\t\t\tobject.skeleton = this.skeleton.uuid;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( this.material !== undefined ) {\n\n\t\t\tif ( Array.isArray( this.material ) ) {\n\n\t\t\t\tconst uuids = [];\n\n\t\t\t\tfor ( let i = 0, l = this.material.length; i < l; i ++ ) {\n\n\t\t\t\t\tuuids.push( serialize( meta.materials, this.material[ i ] ) );\n\n\t\t\t\t}\n\n\t\t\t\tobject.material = uuids;\n\n\t\t\t} else {\n\n\t\t\t\tobject.material = serialize( meta.materials, this.material );\n\n\t\t\t}\n\n\t\t}\n\n\t\t//\n\n\t\tif ( this.children.length > 0 ) {\n\n\t\t\tobject.children = [];\n\n\t\t\tfor ( let i = 0; i < this.children.length; i ++ ) {\n\n\t\t\t\tobject.children.push( this.children[ i ].toJSON( meta ).object );\n\n\t\t\t}\n\n\t\t}\n\n\t\t//\n\n\t\tif ( this.animations.length > 0 ) {\n\n\t\t\tobject.animations = [];\n\n\t\t\tfor ( let i = 0; i < this.animations.length; i ++ ) {\n\n\t\t\t\tconst animation = this.animations[ i ];\n\n\t\t\t\tobject.animations.push( serialize( meta.animations, animation ) );\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( isRootObject ) {\n\n\t\t\tconst geometries = extractFromCache( meta.geometries );\n\t\t\tconst materials = extractFromCache( meta.materials );\n\t\t\tconst textures = extractFromCache( meta.textures );\n\t\t\tconst images = extractFromCache( meta.images );\n\t\t\tconst shapes = extractFromCache( meta.shapes );\n\t\t\tconst skeletons = extractFromCache( meta.skeletons );\n\t\t\tconst animations = extractFromCache( meta.animations );\n\n\t\t\tif ( geometries.length > 0 ) output.geometries = geometries;\n\t\t\tif ( materials.length > 0 ) output.materials = materials;\n\t\t\tif ( textures.length > 0 ) output.textures = textures;\n\t\t\tif ( images.length > 0 ) output.images = images;\n\t\t\tif ( shapes.length > 0 ) output.shapes = shapes;\n\t\t\tif ( skeletons.length > 0 ) output.skeletons = skeletons;\n\t\t\tif ( animations.length > 0 ) output.animations = animations;\n\n\t\t}\n\n\t\toutput.object = object;\n\n\t\treturn output;\n\n\t\t// extract data from the cache hash\n\t\t// remove metadata on each item\n\t\t// and return as array\n\t\tfunction extractFromCache( cache ) {\n\n\t\t\tconst values = [];\n\t\t\tfor ( const key in cache ) {\n\n\t\t\t\tconst data = cache[ key ];\n\t\t\t\tdelete data.metadata;\n\t\t\t\tvalues.push( data );\n\n\t\t\t}\n\n\t\t\treturn values;\n\n\t\t}\n\n\t},\n\n\tclone: function ( recursive ) {\n\n\t\treturn new this.constructor().copy( this, recursive );\n\n\t},\n\n\tcopy: function ( source, recursive = true ) {\n\n\t\tthis.name = source.name;\n\n\t\tthis.up.copy( source.up );\n\n\t\tthis.position.copy( source.position );\n\t\tthis.rotation.order = source.rotation.order;\n\t\tthis.quaternion.copy( source.quaternion );\n\t\tthis.scale.copy( source.scale );\n\n\t\tthis.matrix.copy( source.matrix );\n\t\tthis.matrixWorld.copy( source.matrixWorld );\n\n\t\tthis.matrixAutoUpdate = source.matrixAutoUpdate;\n\t\tthis.matrixWorldNeedsUpdate = source.matrixWorldNeedsUpdate;\n\n\t\tthis.layers.mask = source.layers.mask;\n\t\tthis.visible = source.visible;\n\n\t\tthis.castShadow = source.castShadow;\n\t\tthis.receiveShadow = source.receiveShadow;\n\n\t\tthis.frustumCulled = source.frustumCulled;\n\t\tthis.renderOrder = source.renderOrder;\n\n\t\tthis.userData = JSON.parse( JSON.stringify( source.userData ) );\n\n\t\tif ( recursive === true ) {\n\n\t\t\tfor ( let i = 0; i < source.children.length; i ++ ) {\n\n\t\t\t\tconst child = source.children[ i ];\n\t\t\t\tthis.add( child.clone() );\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n} );\n\nconst _vector1 = /*@__PURE__*/ new Vector3();\nconst _vector2 = /*@__PURE__*/ new Vector3();\nconst _normalMatrix = /*@__PURE__*/ new Matrix3();\n\nclass Plane {\n\n\tconstructor( normal, constant ) {\n\n\t\tObject.defineProperty( this, 'isPlane', { value: true } );\n\n\t\t// normal is assumed to be normalized\n\n\t\tthis.normal = ( normal !== undefined ) ? normal : new Vector3( 1, 0, 0 );\n\t\tthis.constant = ( constant !== undefined ) ? constant : 0;\n\n\t}\n\n\tset( normal, constant ) {\n\n\t\tthis.normal.copy( normal );\n\t\tthis.constant = constant;\n\n\t\treturn this;\n\n\t}\n\n\tsetComponents( x, y, z, w ) {\n\n\t\tthis.normal.set( x, y, z );\n\t\tthis.constant = w;\n\n\t\treturn this;\n\n\t}\n\n\tsetFromNormalAndCoplanarPoint( normal, point ) {\n\n\t\tthis.normal.copy( normal );\n\t\tthis.constant = - point.dot( this.normal );\n\n\t\treturn this;\n\n\t}\n\n\tsetFromCoplanarPoints( a, b, c ) {\n\n\t\tconst normal = _vector1.subVectors( c, b ).cross( _vector2.subVectors( a, b ) ).normalize();\n\n\t\t// Q: should an error be thrown if normal is zero (e.g. degenerate plane)?\n\n\t\tthis.setFromNormalAndCoplanarPoint( normal, a );\n\n\t\treturn this;\n\n\t}\n\n\tclone() {\n\n\t\treturn new this.constructor().copy( this );\n\n\t}\n\n\tcopy( plane ) {\n\n\t\tthis.normal.copy( plane.normal );\n\t\tthis.constant = plane.constant;\n\n\t\treturn this;\n\n\t}\n\n\tnormalize() {\n\n\t\t// Note: will lead to a divide by zero if the plane is invalid.\n\n\t\tconst inverseNormalLength = 1.0 / this.normal.length();\n\t\tthis.normal.multiplyScalar( inverseNormalLength );\n\t\tthis.constant *= inverseNormalLength;\n\n\t\treturn this;\n\n\t}\n\n\tnegate() {\n\n\t\tthis.constant *= - 1;\n\t\tthis.normal.negate();\n\n\t\treturn this;\n\n\t}\n\n\tdistanceToPoint( point ) {\n\n\t\treturn this.normal.dot( point ) + this.constant;\n\n\t}\n\n\tdistanceToSphere( sphere ) {\n\n\t\treturn this.distanceToPoint( sphere.center ) - sphere.radius;\n\n\t}\n\n\tprojectPoint( point, target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Plane: .projectPoint() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\treturn target.copy( this.normal ).multiplyScalar( - this.distanceToPoint( point ) ).add( point );\n\n\t}\n\n\tintersectLine( line, target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Plane: .intersectLine() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\tconst direction = line.delta( _vector1 );\n\n\t\tconst denominator = this.normal.dot( direction );\n\n\t\tif ( denominator === 0 ) {\n\n\t\t\t// line is coplanar, return origin\n\t\t\tif ( this.distanceToPoint( line.start ) === 0 ) {\n\n\t\t\t\treturn target.copy( line.start );\n\n\t\t\t}\n\n\t\t\t// Unsure if this is the correct method to handle this case.\n\t\t\treturn undefined;\n\n\t\t}\n\n\t\tconst t = - ( line.start.dot( this.normal ) + this.constant ) / denominator;\n\n\t\tif ( t < 0 || t > 1 ) {\n\n\t\t\treturn undefined;\n\n\t\t}\n\n\t\treturn target.copy( direction ).multiplyScalar( t ).add( line.start );\n\n\t}\n\n\tintersectsLine( line ) {\n\n\t\t// Note: this tests if a line intersects the plane, not whether it (or its end-points) are coplanar with it.\n\n\t\tconst startSign = this.distanceToPoint( line.start );\n\t\tconst endSign = this.distanceToPoint( line.end );\n\n\t\treturn ( startSign < 0 && endSign > 0 ) || ( endSign < 0 && startSign > 0 );\n\n\t}\n\n\tintersectsBox( box ) {\n\n\t\treturn box.intersectsPlane( this );\n\n\t}\n\n\tintersectsSphere( sphere ) {\n\n\t\treturn sphere.intersectsPlane( this );\n\n\t}\n\n\tcoplanarPoint( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Plane: .coplanarPoint() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\treturn target.copy( this.normal ).multiplyScalar( - this.constant );\n\n\t}\n\n\tapplyMatrix4( matrix, optionalNormalMatrix ) {\n\n\t\tconst normalMatrix = optionalNormalMatrix || _normalMatrix.getNormalMatrix( matrix );\n\n\t\tconst referencePoint = this.coplanarPoint( _vector1 ).applyMatrix4( matrix );\n\n\t\tconst normal = this.normal.applyMatrix3( normalMatrix ).normalize();\n\n\t\tthis.constant = - referencePoint.dot( normal );\n\n\t\treturn this;\n\n\t}\n\n\ttranslate( offset ) {\n\n\t\tthis.constant -= offset.dot( this.normal );\n\n\t\treturn this;\n\n\t}\n\n\tequals( plane ) {\n\n\t\treturn plane.normal.equals( this.normal ) && ( plane.constant === this.constant );\n\n\t}\n\n}\n\nconst _v0$1 = /*@__PURE__*/ new Vector3();\nconst _v1$3 = /*@__PURE__*/ new Vector3();\nconst _v2$1 = /*@__PURE__*/ new Vector3();\nconst _v3 = /*@__PURE__*/ new Vector3();\n\nconst _vab = /*@__PURE__*/ new Vector3();\nconst _vac = /*@__PURE__*/ new Vector3();\nconst _vbc = /*@__PURE__*/ new Vector3();\nconst _vap = /*@__PURE__*/ new Vector3();\nconst _vbp = /*@__PURE__*/ new Vector3();\nconst _vcp = /*@__PURE__*/ new Vector3();\n\nclass Triangle {\n\n\tconstructor( a, b, c ) {\n\n\t\tthis.a = ( a !== undefined ) ? a : new Vector3();\n\t\tthis.b = ( b !== undefined ) ? b : new Vector3();\n\t\tthis.c = ( c !== undefined ) ? c : new Vector3();\n\n\t}\n\n\tstatic getNormal( a, b, c, target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Triangle: .getNormal() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\ttarget.subVectors( c, b );\n\t\t_v0$1.subVectors( a, b );\n\t\ttarget.cross( _v0$1 );\n\n\t\tconst targetLengthSq = target.lengthSq();\n\t\tif ( targetLengthSq > 0 ) {\n\n\t\t\treturn target.multiplyScalar( 1 / Math.sqrt( targetLengthSq ) );\n\n\t\t}\n\n\t\treturn target.set( 0, 0, 0 );\n\n\t}\n\n\t// static/instance method to calculate barycentric coordinates\n\t// based on: http://www.blackpawn.com/texts/pointinpoly/default.html\n\tstatic getBarycoord( point, a, b, c, target ) {\n\n\t\t_v0$1.subVectors( c, a );\n\t\t_v1$3.subVectors( b, a );\n\t\t_v2$1.subVectors( point, a );\n\n\t\tconst dot00 = _v0$1.dot( _v0$1 );\n\t\tconst dot01 = _v0$1.dot( _v1$3 );\n\t\tconst dot02 = _v0$1.dot( _v2$1 );\n\t\tconst dot11 = _v1$3.dot( _v1$3 );\n\t\tconst dot12 = _v1$3.dot( _v2$1 );\n\n\t\tconst denom = ( dot00 * dot11 - dot01 * dot01 );\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Triangle: .getBarycoord() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\t// collinear or singular triangle\n\t\tif ( denom === 0 ) {\n\n\t\t\t// arbitrary location outside of triangle?\n\t\t\t// not sure if this is the best idea, maybe should be returning undefined\n\t\t\treturn target.set( - 2, - 1, - 1 );\n\n\t\t}\n\n\t\tconst invDenom = 1 / denom;\n\t\tconst u = ( dot11 * dot02 - dot01 * dot12 ) * invDenom;\n\t\tconst v = ( dot00 * dot12 - dot01 * dot02 ) * invDenom;\n\n\t\t// barycentric coordinates must always sum to 1\n\t\treturn target.set( 1 - u - v, v, u );\n\n\t}\n\n\tstatic containsPoint( point, a, b, c ) {\n\n\t\tthis.getBarycoord( point, a, b, c, _v3 );\n\n\t\treturn ( _v3.x >= 0 ) && ( _v3.y >= 0 ) && ( ( _v3.x + _v3.y ) <= 1 );\n\n\t}\n\n\tstatic getUV( point, p1, p2, p3, uv1, uv2, uv3, target ) {\n\n\t\tthis.getBarycoord( point, p1, p2, p3, _v3 );\n\n\t\ttarget.set( 0, 0 );\n\t\ttarget.addScaledVector( uv1, _v3.x );\n\t\ttarget.addScaledVector( uv2, _v3.y );\n\t\ttarget.addScaledVector( uv3, _v3.z );\n\n\t\treturn target;\n\n\t}\n\n\tstatic isFrontFacing( a, b, c, direction ) {\n\n\t\t_v0$1.subVectors( c, b );\n\t\t_v1$3.subVectors( a, b );\n\n\t\t// strictly front facing\n\t\treturn ( _v0$1.cross( _v1$3 ).dot( direction ) < 0 ) ? true : false;\n\n\t}\n\n\tset( a, b, c ) {\n\n\t\tthis.a.copy( a );\n\t\tthis.b.copy( b );\n\t\tthis.c.copy( c );\n\n\t\treturn this;\n\n\t}\n\n\tsetFromPointsAndIndices( points, i0, i1, i2 ) {\n\n\t\tthis.a.copy( points[ i0 ] );\n\t\tthis.b.copy( points[ i1 ] );\n\t\tthis.c.copy( points[ i2 ] );\n\n\t\treturn this;\n\n\t}\n\n\tclone() {\n\n\t\treturn new this.constructor().copy( this );\n\n\t}\n\n\tcopy( triangle ) {\n\n\t\tthis.a.copy( triangle.a );\n\t\tthis.b.copy( triangle.b );\n\t\tthis.c.copy( triangle.c );\n\n\t\treturn this;\n\n\t}\n\n\tgetArea() {\n\n\t\t_v0$1.subVectors( this.c, this.b );\n\t\t_v1$3.subVectors( this.a, this.b );\n\n\t\treturn _v0$1.cross( _v1$3 ).length() * 0.5;\n\n\t}\n\n\tgetMidpoint( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Triangle: .getMidpoint() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\treturn target.addVectors( this.a, this.b ).add( this.c ).multiplyScalar( 1 / 3 );\n\n\t}\n\n\tgetNormal( target ) {\n\n\t\treturn Triangle.getNormal( this.a, this.b, this.c, target );\n\n\t}\n\n\tgetPlane( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Triangle: .getPlane() target is now required' );\n\t\t\ttarget = new Plane();\n\n\t\t}\n\n\t\treturn target.setFromCoplanarPoints( this.a, this.b, this.c );\n\n\t}\n\n\tgetBarycoord( point, target ) {\n\n\t\treturn Triangle.getBarycoord( point, this.a, this.b, this.c, target );\n\n\t}\n\n\tgetUV( point, uv1, uv2, uv3, target ) {\n\n\t\treturn Triangle.getUV( point, this.a, this.b, this.c, uv1, uv2, uv3, target );\n\n\t}\n\n\tcontainsPoint( point ) {\n\n\t\treturn Triangle.containsPoint( point, this.a, this.b, this.c );\n\n\t}\n\n\tisFrontFacing( direction ) {\n\n\t\treturn Triangle.isFrontFacing( this.a, this.b, this.c, direction );\n\n\t}\n\n\tintersectsBox( box ) {\n\n\t\treturn box.intersectsTriangle( this );\n\n\t}\n\n\tclosestPointToPoint( p, target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Triangle: .closestPointToPoint() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\tconst a = this.a, b = this.b, c = this.c;\n\t\tlet v, w;\n\n\t\t// algorithm thanks to Real-Time Collision Detection by Christer Ericson,\n\t\t// published by Morgan Kaufmann Publishers, (c) 2005 Elsevier Inc.,\n\t\t// under the accompanying license; see chapter 5.1.5 for detailed explanation.\n\t\t// basically, we're distinguishing which of the voronoi regions of the triangle\n\t\t// the point lies in with the minimum amount of redundant computation.\n\n\t\t_vab.subVectors( b, a );\n\t\t_vac.subVectors( c, a );\n\t\t_vap.subVectors( p, a );\n\t\tconst d1 = _vab.dot( _vap );\n\t\tconst d2 = _vac.dot( _vap );\n\t\tif ( d1 <= 0 && d2 <= 0 ) {\n\n\t\t\t// vertex region of A; barycentric coords (1, 0, 0)\n\t\t\treturn target.copy( a );\n\n\t\t}\n\n\t\t_vbp.subVectors( p, b );\n\t\tconst d3 = _vab.dot( _vbp );\n\t\tconst d4 = _vac.dot( _vbp );\n\t\tif ( d3 >= 0 && d4 <= d3 ) {\n\n\t\t\t// vertex region of B; barycentric coords (0, 1, 0)\n\t\t\treturn target.copy( b );\n\n\t\t}\n\n\t\tconst vc = d1 * d4 - d3 * d2;\n\t\tif ( vc <= 0 && d1 >= 0 && d3 <= 0 ) {\n\n\t\t\tv = d1 / ( d1 - d3 );\n\t\t\t// edge region of AB; barycentric coords (1-v, v, 0)\n\t\t\treturn target.copy( a ).addScaledVector( _vab, v );\n\n\t\t}\n\n\t\t_vcp.subVectors( p, c );\n\t\tconst d5 = _vab.dot( _vcp );\n\t\tconst d6 = _vac.dot( _vcp );\n\t\tif ( d6 >= 0 && d5 <= d6 ) {\n\n\t\t\t// vertex region of C; barycentric coords (0, 0, 1)\n\t\t\treturn target.copy( c );\n\n\t\t}\n\n\t\tconst vb = d5 * d2 - d1 * d6;\n\t\tif ( vb <= 0 && d2 >= 0 && d6 <= 0 ) {\n\n\t\t\tw = d2 / ( d2 - d6 );\n\t\t\t// edge region of AC; barycentric coords (1-w, 0, w)\n\t\t\treturn target.copy( a ).addScaledVector( _vac, w );\n\n\t\t}\n\n\t\tconst va = d3 * d6 - d5 * d4;\n\t\tif ( va <= 0 && ( d4 - d3 ) >= 0 && ( d5 - d6 ) >= 0 ) {\n\n\t\t\t_vbc.subVectors( c, b );\n\t\t\tw = ( d4 - d3 ) / ( ( d4 - d3 ) + ( d5 - d6 ) );\n\t\t\t// edge region of BC; barycentric coords (0, 1-w, w)\n\t\t\treturn target.copy( b ).addScaledVector( _vbc, w ); // edge region of BC\n\n\t\t}\n\n\t\t// face region\n\t\tconst denom = 1 / ( va + vb + vc );\n\t\t// u = va * denom\n\t\tv = vb * denom;\n\t\tw = vc * denom;\n\n\t\treturn target.copy( a ).addScaledVector( _vab, v ).addScaledVector( _vac, w );\n\n\t}\n\n\tequals( triangle ) {\n\n\t\treturn triangle.a.equals( this.a ) && triangle.b.equals( this.b ) && triangle.c.equals( this.c );\n\n\t}\n\n}\n\nconst _colorKeywords = { 'aliceblue': 0xF0F8FF, 'antiquewhite': 0xFAEBD7, 'aqua': 0x00FFFF, 'aquamarine': 0x7FFFD4, 'azure': 0xF0FFFF,\n\t'beige': 0xF5F5DC, 'bisque': 0xFFE4C4, 'black': 0x000000, 'blanchedalmond': 0xFFEBCD, 'blue': 0x0000FF, 'blueviolet': 0x8A2BE2,\n\t'brown': 0xA52A2A, 'burlywood': 0xDEB887, 'cadetblue': 0x5F9EA0, 'chartreuse': 0x7FFF00, 'chocolate': 0xD2691E, 'coral': 0xFF7F50,\n\t'cornflowerblue': 0x6495ED, 'cornsilk': 0xFFF8DC, 'crimson': 0xDC143C, 'cyan': 0x00FFFF, 'darkblue': 0x00008B, 'darkcyan': 0x008B8B,\n\t'darkgoldenrod': 0xB8860B, 'darkgray': 0xA9A9A9, 'darkgreen': 0x006400, 'darkgrey': 0xA9A9A9, 'darkkhaki': 0xBDB76B, 'darkmagenta': 0x8B008B,\n\t'darkolivegreen': 0x556B2F, 'darkorange': 0xFF8C00, 'darkorchid': 0x9932CC, 'darkred': 0x8B0000, 'darksalmon': 0xE9967A, 'darkseagreen': 0x8FBC8F,\n\t'darkslateblue': 0x483D8B, 'darkslategray': 0x2F4F4F, 'darkslategrey': 0x2F4F4F, 'darkturquoise': 0x00CED1, 'darkviolet': 0x9400D3,\n\t'deeppink': 0xFF1493, 'deepskyblue': 0x00BFFF, 'dimgray': 0x696969, 'dimgrey': 0x696969, 'dodgerblue': 0x1E90FF, 'firebrick': 0xB22222,\n\t'floralwhite': 0xFFFAF0, 'forestgreen': 0x228B22, 'fuchsia': 0xFF00FF, 'gainsboro': 0xDCDCDC, 'ghostwhite': 0xF8F8FF, 'gold': 0xFFD700,\n\t'goldenrod': 0xDAA520, 'gray': 0x808080, 'green': 0x008000, 'greenyellow': 0xADFF2F, 'grey': 0x808080, 'honeydew': 0xF0FFF0, 'hotpink': 0xFF69B4,\n\t'indianred': 0xCD5C5C, 'indigo': 0x4B0082, 'ivory': 0xFFFFF0, 'khaki': 0xF0E68C, 'lavender': 0xE6E6FA, 'lavenderblush': 0xFFF0F5, 'lawngreen': 0x7CFC00,\n\t'lemonchiffon': 0xFFFACD, 'lightblue': 0xADD8E6, 'lightcoral': 0xF08080, 'lightcyan': 0xE0FFFF, 'lightgoldenrodyellow': 0xFAFAD2, 'lightgray': 0xD3D3D3,\n\t'lightgreen': 0x90EE90, 'lightgrey': 0xD3D3D3, 'lightpink': 0xFFB6C1, 'lightsalmon': 0xFFA07A, 'lightseagreen': 0x20B2AA, 'lightskyblue': 0x87CEFA,\n\t'lightslategray': 0x778899, 'lightslategrey': 0x778899, 'lightsteelblue': 0xB0C4DE, 'lightyellow': 0xFFFFE0, 'lime': 0x00FF00, 'limegreen': 0x32CD32,\n\t'linen': 0xFAF0E6, 'magenta': 0xFF00FF, 'maroon': 0x800000, 'mediumaquamarine': 0x66CDAA, 'mediumblue': 0x0000CD, 'mediumorchid': 0xBA55D3,\n\t'mediumpurple': 0x9370DB, 'mediumseagreen': 0x3CB371, 'mediumslateblue': 0x7B68EE, 'mediumspringgreen': 0x00FA9A, 'mediumturquoise': 0x48D1CC,\n\t'mediumvioletred': 0xC71585, 'midnightblue': 0x191970, 'mintcream': 0xF5FFFA, 'mistyrose': 0xFFE4E1, 'moccasin': 0xFFE4B5, 'navajowhite': 0xFFDEAD,\n\t'navy': 0x000080, 'oldlace': 0xFDF5E6, 'olive': 0x808000, 'olivedrab': 0x6B8E23, 'orange': 0xFFA500, 'orangered': 0xFF4500, 'orchid': 0xDA70D6,\n\t'palegoldenrod': 0xEEE8AA, 'palegreen': 0x98FB98, 'paleturquoise': 0xAFEEEE, 'palevioletred': 0xDB7093, 'papayawhip': 0xFFEFD5, 'peachpuff': 0xFFDAB9,\n\t'peru': 0xCD853F, 'pink': 0xFFC0CB, 'plum': 0xDDA0DD, 'powderblue': 0xB0E0E6, 'purple': 0x800080, 'rebeccapurple': 0x663399, 'red': 0xFF0000, 'rosybrown': 0xBC8F8F,\n\t'royalblue': 0x4169E1, 'saddlebrown': 0x8B4513, 'salmon': 0xFA8072, 'sandybrown': 0xF4A460, 'seagreen': 0x2E8B57, 'seashell': 0xFFF5EE,\n\t'sienna': 0xA0522D, 'silver': 0xC0C0C0, 'skyblue': 0x87CEEB, 'slateblue': 0x6A5ACD, 'slategray': 0x708090, 'slategrey': 0x708090, 'snow': 0xFFFAFA,\n\t'springgreen': 0x00FF7F, 'steelblue': 0x4682B4, 'tan': 0xD2B48C, 'teal': 0x008080, 'thistle': 0xD8BFD8, 'tomato': 0xFF6347, 'turquoise': 0x40E0D0,\n\t'violet': 0xEE82EE, 'wheat': 0xF5DEB3, 'white': 0xFFFFFF, 'whitesmoke': 0xF5F5F5, 'yellow': 0xFFFF00, 'yellowgreen': 0x9ACD32 };\n\nconst _hslA = { h: 0, s: 0, l: 0 };\nconst _hslB = { h: 0, s: 0, l: 0 };\n\nfunction hue2rgb( p, q, t ) {\n\n\tif ( t < 0 ) t += 1;\n\tif ( t > 1 ) t -= 1;\n\tif ( t < 1 / 6 ) return p + ( q - p ) * 6 * t;\n\tif ( t < 1 / 2 ) return q;\n\tif ( t < 2 / 3 ) return p + ( q - p ) * 6 * ( 2 / 3 - t );\n\treturn p;\n\n}\n\nfunction SRGBToLinear( c ) {\n\n\treturn ( c < 0.04045 ) ? c * 0.0773993808 : Math.pow( c * 0.9478672986 + 0.0521327014, 2.4 );\n\n}\n\nfunction LinearToSRGB( c ) {\n\n\treturn ( c < 0.0031308 ) ? c * 12.92 : 1.055 * ( Math.pow( c, 0.41666 ) ) - 0.055;\n\n}\n\nclass Color {\n\n\tconstructor( r, g, b ) {\n\n\t\tObject.defineProperty( this, 'isColor', { value: true } );\n\n\t\tif ( g === undefined && b === undefined ) {\n\n\t\t\t// r is THREE.Color, hex or string\n\t\t\treturn this.set( r );\n\n\t\t}\n\n\t\treturn this.setRGB( r, g, b );\n\n\t}\n\n\tset( value ) {\n\n\t\tif ( value && value.isColor ) {\n\n\t\t\tthis.copy( value );\n\n\t\t} else if ( typeof value === 'number' ) {\n\n\t\t\tthis.setHex( value );\n\n\t\t} else if ( typeof value === 'string' ) {\n\n\t\t\tthis.setStyle( value );\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n\tsetScalar( scalar ) {\n\n\t\tthis.r = scalar;\n\t\tthis.g = scalar;\n\t\tthis.b = scalar;\n\n\t\treturn this;\n\n\t}\n\n\tsetHex( hex ) {\n\n\t\thex = Math.floor( hex );\n\n\t\tthis.r = ( hex >> 16 & 255 ) / 255;\n\t\tthis.g = ( hex >> 8 & 255 ) / 255;\n\t\tthis.b = ( hex & 255 ) / 255;\n\n\t\treturn this;\n\n\t}\n\n\tsetRGB( r, g, b ) {\n\n\t\tthis.r = r;\n\t\tthis.g = g;\n\t\tthis.b = b;\n\n\t\treturn this;\n\n\t}\n\n\tsetHSL( h, s, l ) {\n\n\t\t// h,s,l ranges are in 0.0 - 1.0\n\t\th = MathUtils.euclideanModulo( h, 1 );\n\t\ts = MathUtils.clamp( s, 0, 1 );\n\t\tl = MathUtils.clamp( l, 0, 1 );\n\n\t\tif ( s === 0 ) {\n\n\t\t\tthis.r = this.g = this.b = l;\n\n\t\t} else {\n\n\t\t\tconst p = l <= 0.5 ? l * ( 1 + s ) : l + s - ( l * s );\n\t\t\tconst q = ( 2 * l ) - p;\n\n\t\t\tthis.r = hue2rgb( q, p, h + 1 / 3 );\n\t\t\tthis.g = hue2rgb( q, p, h );\n\t\t\tthis.b = hue2rgb( q, p, h - 1 / 3 );\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n\tsetStyle( style ) {\n\n\t\tfunction handleAlpha( string ) {\n\n\t\t\tif ( string === undefined ) return;\n\n\t\t\tif ( parseFloat( string ) < 1 ) {\n\n\t\t\t\tconsole.warn( 'THREE.Color: Alpha component of ' + style + ' will be ignored.' );\n\n\t\t\t}\n\n\t\t}\n\n\n\t\tlet m;\n\n\t\tif ( m = /^((?:rgb|hsl)a?)\\(([^\\)]*)\\)/.exec( style ) ) {\n\n\t\t\t// rgb / hsl\n\n\t\t\tlet color;\n\t\t\tconst name = m[ 1 ];\n\t\t\tconst components = m[ 2 ];\n\n\t\t\tswitch ( name ) {\n\n\t\t\t\tcase 'rgb':\n\t\t\t\tcase 'rgba':\n\n\t\t\t\t\tif ( color = /^\\s*(\\d+)\\s*,\\s*(\\d+)\\s*,\\s*(\\d+)\\s*(?:,\\s*(\\d*\\.?\\d+)\\s*)?$/.exec( components ) ) {\n\n\t\t\t\t\t\t// rgb(255,0,0) rgba(255,0,0,0.5)\n\t\t\t\t\t\tthis.r = Math.min( 255, parseInt( color[ 1 ], 10 ) ) / 255;\n\t\t\t\t\t\tthis.g = Math.min( 255, parseInt( color[ 2 ], 10 ) ) / 255;\n\t\t\t\t\t\tthis.b = Math.min( 255, parseInt( color[ 3 ], 10 ) ) / 255;\n\n\t\t\t\t\t\thandleAlpha( color[ 4 ] );\n\n\t\t\t\t\t\treturn this;\n\n\t\t\t\t\t}\n\n\t\t\t\t\tif ( color = /^\\s*(\\d+)\\%\\s*,\\s*(\\d+)\\%\\s*,\\s*(\\d+)\\%\\s*(?:,\\s*(\\d*\\.?\\d+)\\s*)?$/.exec( components ) ) {\n\n\t\t\t\t\t\t// rgb(100%,0%,0%) rgba(100%,0%,0%,0.5)\n\t\t\t\t\t\tthis.r = Math.min( 100, parseInt( color[ 1 ], 10 ) ) / 100;\n\t\t\t\t\t\tthis.g = Math.min( 100, parseInt( color[ 2 ], 10 ) ) / 100;\n\t\t\t\t\t\tthis.b = Math.min( 100, parseInt( color[ 3 ], 10 ) ) / 100;\n\n\t\t\t\t\t\thandleAlpha( color[ 4 ] );\n\n\t\t\t\t\t\treturn this;\n\n\t\t\t\t\t}\n\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase 'hsl':\n\t\t\t\tcase 'hsla':\n\n\t\t\t\t\tif ( color = /^\\s*(\\d*\\.?\\d+)\\s*,\\s*(\\d+)\\%\\s*,\\s*(\\d+)\\%\\s*(?:,\\s*(\\d*\\.?\\d+)\\s*)?$/.exec( components ) ) {\n\n\t\t\t\t\t\t// hsl(120,50%,50%) hsla(120,50%,50%,0.5)\n\t\t\t\t\t\tconst h = parseFloat( color[ 1 ] ) / 360;\n\t\t\t\t\t\tconst s = parseInt( color[ 2 ], 10 ) / 100;\n\t\t\t\t\t\tconst l = parseInt( color[ 3 ], 10 ) / 100;\n\n\t\t\t\t\t\thandleAlpha( color[ 4 ] );\n\n\t\t\t\t\t\treturn this.setHSL( h, s, l );\n\n\t\t\t\t\t}\n\n\t\t\t\t\tbreak;\n\n\t\t\t}\n\n\t\t} else if ( m = /^\\#([A-Fa-f\\d]+)$/.exec( style ) ) {\n\n\t\t\t// hex color\n\n\t\t\tconst hex = m[ 1 ];\n\t\t\tconst size = hex.length;\n\n\t\t\tif ( size === 3 ) {\n\n\t\t\t\t// #ff0\n\t\t\t\tthis.r = parseInt( hex.charAt( 0 ) + hex.charAt( 0 ), 16 ) / 255;\n\t\t\t\tthis.g = parseInt( hex.charAt( 1 ) + hex.charAt( 1 ), 16 ) / 255;\n\t\t\t\tthis.b = parseInt( hex.charAt( 2 ) + hex.charAt( 2 ), 16 ) / 255;\n\n\t\t\t\treturn this;\n\n\t\t\t} else if ( size === 6 ) {\n\n\t\t\t\t// #ff0000\n\t\t\t\tthis.r = parseInt( hex.charAt( 0 ) + hex.charAt( 1 ), 16 ) / 255;\n\t\t\t\tthis.g = parseInt( hex.charAt( 2 ) + hex.charAt( 3 ), 16 ) / 255;\n\t\t\t\tthis.b = parseInt( hex.charAt( 4 ) + hex.charAt( 5 ), 16 ) / 255;\n\n\t\t\t\treturn this;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( style && style.length > 0 ) {\n\n\t\t\treturn this.setColorName( style );\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n\tsetColorName( style ) {\n\n\t\t// color keywords\n\t\tconst hex = _colorKeywords[ style ];\n\n\t\tif ( hex !== undefined ) {\n\n\t\t\t// red\n\t\t\tthis.setHex( hex );\n\n\t\t} else {\n\n\t\t\t// unknown color\n\t\t\tconsole.warn( 'THREE.Color: Unknown color ' + style );\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n\tclone() {\n\n\t\treturn new this.constructor( this.r, this.g, this.b );\n\n\t}\n\n\tcopy( color ) {\n\n\t\tthis.r = color.r;\n\t\tthis.g = color.g;\n\t\tthis.b = color.b;\n\n\t\treturn this;\n\n\t}\n\n\tcopyGammaToLinear( color, gammaFactor = 2.0 ) {\n\n\t\tthis.r = Math.pow( color.r, gammaFactor );\n\t\tthis.g = Math.pow( color.g, gammaFactor );\n\t\tthis.b = Math.pow( color.b, gammaFactor );\n\n\t\treturn this;\n\n\t}\n\n\tcopyLinearToGamma( color, gammaFactor = 2.0 ) {\n\n\t\tconst safeInverse = ( gammaFactor > 0 ) ? ( 1.0 / gammaFactor ) : 1.0;\n\n\t\tthis.r = Math.pow( color.r, safeInverse );\n\t\tthis.g = Math.pow( color.g, safeInverse );\n\t\tthis.b = Math.pow( color.b, safeInverse );\n\n\t\treturn this;\n\n\t}\n\n\tconvertGammaToLinear( gammaFactor ) {\n\n\t\tthis.copyGammaToLinear( this, gammaFactor );\n\n\t\treturn this;\n\n\t}\n\n\tconvertLinearToGamma( gammaFactor ) {\n\n\t\tthis.copyLinearToGamma( this, gammaFactor );\n\n\t\treturn this;\n\n\t}\n\n\tcopySRGBToLinear( color ) {\n\n\t\tthis.r = SRGBToLinear( color.r );\n\t\tthis.g = SRGBToLinear( color.g );\n\t\tthis.b = SRGBToLinear( color.b );\n\n\t\treturn this;\n\n\t}\n\n\tcopyLinearToSRGB( color ) {\n\n\t\tthis.r = LinearToSRGB( color.r );\n\t\tthis.g = LinearToSRGB( color.g );\n\t\tthis.b = LinearToSRGB( color.b );\n\n\t\treturn this;\n\n\t}\n\n\tconvertSRGBToLinear() {\n\n\t\tthis.copySRGBToLinear( this );\n\n\t\treturn this;\n\n\t}\n\n\tconvertLinearToSRGB() {\n\n\t\tthis.copyLinearToSRGB( this );\n\n\t\treturn this;\n\n\t}\n\n\tgetHex() {\n\n\t\treturn ( this.r * 255 ) << 16 ^ ( this.g * 255 ) << 8 ^ ( this.b * 255 ) << 0;\n\n\t}\n\n\tgetHexString() {\n\n\t\treturn ( '000000' + this.getHex().toString( 16 ) ).slice( - 6 );\n\n\t}\n\n\tgetHSL( target ) {\n\n\t\t// h,s,l ranges are in 0.0 - 1.0\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Color: .getHSL() target is now required' );\n\t\t\ttarget = { h: 0, s: 0, l: 0 };\n\n\t\t}\n\n\t\tconst r = this.r, g = this.g, b = this.b;\n\n\t\tconst max = Math.max( r, g, b );\n\t\tconst min = Math.min( r, g, b );\n\n\t\tlet hue, saturation;\n\t\tconst lightness = ( min + max ) / 2.0;\n\n\t\tif ( min === max ) {\n\n\t\t\thue = 0;\n\t\t\tsaturation = 0;\n\n\t\t} else {\n\n\t\t\tconst delta = max - min;\n\n\t\t\tsaturation = lightness <= 0.5 ? delta / ( max + min ) : delta / ( 2 - max - min );\n\n\t\t\tswitch ( max ) {\n\n\t\t\t\tcase r: hue = ( g - b ) / delta + ( g < b ? 6 : 0 ); break;\n\t\t\t\tcase g: hue = ( b - r ) / delta + 2; break;\n\t\t\t\tcase b: hue = ( r - g ) / delta + 4; break;\n\n\t\t\t}\n\n\t\t\thue /= 6;\n\n\t\t}\n\n\t\ttarget.h = hue;\n\t\ttarget.s = saturation;\n\t\ttarget.l = lightness;\n\n\t\treturn target;\n\n\t}\n\n\tgetStyle() {\n\n\t\treturn 'rgb(' + ( ( this.r * 255 ) | 0 ) + ',' + ( ( this.g * 255 ) | 0 ) + ',' + ( ( this.b * 255 ) | 0 ) + ')';\n\n\t}\n\n\toffsetHSL( h, s, l ) {\n\n\t\tthis.getHSL( _hslA );\n\n\t\t_hslA.h += h; _hslA.s += s; _hslA.l += l;\n\n\t\tthis.setHSL( _hslA.h, _hslA.s, _hslA.l );\n\n\t\treturn this;\n\n\t}\n\n\tadd( color ) {\n\n\t\tthis.r += color.r;\n\t\tthis.g += color.g;\n\t\tthis.b += color.b;\n\n\t\treturn this;\n\n\t}\n\n\taddColors( color1, color2 ) {\n\n\t\tthis.r = color1.r + color2.r;\n\t\tthis.g = color1.g + color2.g;\n\t\tthis.b = color1.b + color2.b;\n\n\t\treturn this;\n\n\t}\n\n\taddScalar( s ) {\n\n\t\tthis.r += s;\n\t\tthis.g += s;\n\t\tthis.b += s;\n\n\t\treturn this;\n\n\t}\n\n\tsub( color ) {\n\n\t\tthis.r = Math.max( 0, this.r - color.r );\n\t\tthis.g = Math.max( 0, this.g - color.g );\n\t\tthis.b = Math.max( 0, this.b - color.b );\n\n\t\treturn this;\n\n\t}\n\n\tmultiply( color ) {\n\n\t\tthis.r *= color.r;\n\t\tthis.g *= color.g;\n\t\tthis.b *= color.b;\n\n\t\treturn this;\n\n\t}\n\n\tmultiplyScalar( s ) {\n\n\t\tthis.r *= s;\n\t\tthis.g *= s;\n\t\tthis.b *= s;\n\n\t\treturn this;\n\n\t}\n\n\tlerp( color, alpha ) {\n\n\t\tthis.r += ( color.r - this.r ) * alpha;\n\t\tthis.g += ( color.g - this.g ) * alpha;\n\t\tthis.b += ( color.b - this.b ) * alpha;\n\n\t\treturn this;\n\n\t}\n\n\tlerpColors( color1, color2, alpha ) {\n\n\t\tthis.r = color1.r + ( color2.r - color1.r ) * alpha;\n\t\tthis.g = color1.g + ( color2.g - color1.g ) * alpha;\n\t\tthis.b = color1.b + ( color2.b - color1.b ) * alpha;\n\n\t\treturn this;\n\n\t}\n\n\tlerpHSL( color, alpha ) {\n\n\t\tthis.getHSL( _hslA );\n\t\tcolor.getHSL( _hslB );\n\n\t\tconst h = MathUtils.lerp( _hslA.h, _hslB.h, alpha );\n\t\tconst s = MathUtils.lerp( _hslA.s, _hslB.s, alpha );\n\t\tconst l = MathUtils.lerp( _hslA.l, _hslB.l, alpha );\n\n\t\tthis.setHSL( h, s, l );\n\n\t\treturn this;\n\n\t}\n\n\tequals( c ) {\n\n\t\treturn ( c.r === this.r ) && ( c.g === this.g ) && ( c.b === this.b );\n\n\t}\n\n\tfromArray( array, offset = 0 ) {\n\n\t\tthis.r = array[ offset ];\n\t\tthis.g = array[ offset + 1 ];\n\t\tthis.b = array[ offset + 2 ];\n\n\t\treturn this;\n\n\t}\n\n\ttoArray( array = [], offset = 0 ) {\n\n\t\tarray[ offset ] = this.r;\n\t\tarray[ offset + 1 ] = this.g;\n\t\tarray[ offset + 2 ] = this.b;\n\n\t\treturn array;\n\n\t}\n\n\tfromBufferAttribute( attribute, index ) {\n\n\t\tthis.r = attribute.getX( index );\n\t\tthis.g = attribute.getY( index );\n\t\tthis.b = attribute.getZ( index );\n\n\t\tif ( attribute.normalized === true ) {\n\n\t\t\t// assuming Uint8Array\n\n\t\t\tthis.r /= 255;\n\t\t\tthis.g /= 255;\n\t\t\tthis.b /= 255;\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n\ttoJSON() {\n\n\t\treturn this.getHex();\n\n\t}\n\n}\n\nColor.NAMES = _colorKeywords;\nColor.prototype.r = 1;\nColor.prototype.g = 1;\nColor.prototype.b = 1;\n\nclass Face3 {\n\n\tconstructor( a, b, c, normal, color, materialIndex = 0 ) {\n\n\t\tthis.a = a;\n\t\tthis.b = b;\n\t\tthis.c = c;\n\n\t\tthis.normal = ( normal && normal.isVector3 ) ? normal : new Vector3();\n\t\tthis.vertexNormals = Array.isArray( normal ) ? normal : [];\n\n\t\tthis.color = ( color && color.isColor ) ? color : new Color();\n\t\tthis.vertexColors = Array.isArray( color ) ? color : [];\n\n\t\tthis.materialIndex = materialIndex;\n\n\t}\n\n\tclone() {\n\n\t\treturn new this.constructor().copy( this );\n\n\t}\n\n\tcopy( source ) {\n\n\t\tthis.a = source.a;\n\t\tthis.b = source.b;\n\t\tthis.c = source.c;\n\n\t\tthis.normal.copy( source.normal );\n\t\tthis.color.copy( source.color );\n\n\t\tthis.materialIndex = source.materialIndex;\n\n\t\tfor ( let i = 0, il = source.vertexNormals.length; i < il; i ++ ) {\n\n\t\t\tthis.vertexNormals[ i ] = source.vertexNormals[ i ].clone();\n\n\t\t}\n\n\t\tfor ( let i = 0, il = source.vertexColors.length; i < il; i ++ ) {\n\n\t\t\tthis.vertexColors[ i ] = source.vertexColors[ i ].clone();\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n}\n\nlet materialId = 0;\n\nfunction Material() {\n\n\tObject.defineProperty( this, 'id', { value: materialId ++ } );\n\n\tthis.uuid = MathUtils.generateUUID();\n\n\tthis.name = '';\n\tthis.type = 'Material';\n\n\tthis.fog = true;\n\n\tthis.blending = NormalBlending;\n\tthis.side = FrontSide;\n\tthis.flatShading = false;\n\tthis.vertexColors = false;\n\n\tthis.opacity = 1;\n\tthis.transparent = false;\n\n\tthis.blendSrc = SrcAlphaFactor;\n\tthis.blendDst = OneMinusSrcAlphaFactor;\n\tthis.blendEquation = AddEquation;\n\tthis.blendSrcAlpha = null;\n\tthis.blendDstAlpha = null;\n\tthis.blendEquationAlpha = null;\n\n\tthis.depthFunc = LessEqualDepth;\n\tthis.depthTest = true;\n\tthis.depthWrite = true;\n\n\tthis.stencilWriteMask = 0xff;\n\tthis.stencilFunc = AlwaysStencilFunc;\n\tthis.stencilRef = 0;\n\tthis.stencilFuncMask = 0xff;\n\tthis.stencilFail = KeepStencilOp;\n\tthis.stencilZFail = KeepStencilOp;\n\tthis.stencilZPass = KeepStencilOp;\n\tthis.stencilWrite = false;\n\n\tthis.clippingPlanes = null;\n\tthis.clipIntersection = false;\n\tthis.clipShadows = false;\n\n\tthis.shadowSide = null;\n\n\tthis.colorWrite = true;\n\n\tthis.precision = null; // override the renderer's default precision for this material\n\n\tthis.polygonOffset = false;\n\tthis.polygonOffsetFactor = 0;\n\tthis.polygonOffsetUnits = 0;\n\n\tthis.dithering = false;\n\n\tthis.alphaTest = 0;\n\tthis.premultipliedAlpha = false;\n\n\tthis.visible = true;\n\n\tthis.toneMapped = true;\n\n\tthis.userData = {};\n\n\tthis.version = 0;\n\n}\n\nMaterial.prototype = Object.assign( Object.create( EventDispatcher.prototype ), {\n\n\tconstructor: Material,\n\n\tisMaterial: true,\n\n\tonBeforeCompile: function ( /* shaderobject, renderer */ ) {},\n\n\tcustomProgramCacheKey: function () {\n\n\t\treturn this.onBeforeCompile.toString();\n\n\t},\n\n\tsetValues: function ( values ) {\n\n\t\tif ( values === undefined ) return;\n\n\t\tfor ( const key in values ) {\n\n\t\t\tconst newValue = values[ key ];\n\n\t\t\tif ( newValue === undefined ) {\n\n\t\t\t\tconsole.warn( 'THREE.Material: \\'' + key + '\\' parameter is undefined.' );\n\t\t\t\tcontinue;\n\n\t\t\t}\n\n\t\t\t// for backward compatability if shading is set in the constructor\n\t\t\tif ( key === 'shading' ) {\n\n\t\t\t\tconsole.warn( 'THREE.' + this.type + ': .shading has been removed. Use the boolean .flatShading instead.' );\n\t\t\t\tthis.flatShading = ( newValue === FlatShading ) ? true : false;\n\t\t\t\tcontinue;\n\n\t\t\t}\n\n\t\t\tconst currentValue = this[ key ];\n\n\t\t\tif ( currentValue === undefined ) {\n\n\t\t\t\tconsole.warn( 'THREE.' + this.type + ': \\'' + key + '\\' is not a property of this material.' );\n\t\t\t\tcontinue;\n\n\t\t\t}\n\n\t\t\tif ( currentValue && currentValue.isColor ) {\n\n\t\t\t\tcurrentValue.set( newValue );\n\n\t\t\t} else if ( ( currentValue && currentValue.isVector3 ) && ( newValue && newValue.isVector3 ) ) {\n\n\t\t\t\tcurrentValue.copy( newValue );\n\n\t\t\t} else {\n\n\t\t\t\tthis[ key ] = newValue;\n\n\t\t\t}\n\n\t\t}\n\n\t},\n\n\ttoJSON: function ( meta ) {\n\n\t\tconst isRoot = ( meta === undefined || typeof meta === 'string' );\n\n\t\tif ( isRoot ) {\n\n\t\t\tmeta = {\n\t\t\t\ttextures: {},\n\t\t\t\timages: {}\n\t\t\t};\n\n\t\t}\n\n\t\tconst data = {\n\t\t\tmetadata: {\n\t\t\t\tversion: 4.5,\n\t\t\t\ttype: 'Material',\n\t\t\t\tgenerator: 'Material.toJSON'\n\t\t\t}\n\t\t};\n\n\t\t// standard Material serialization\n\t\tdata.uuid = this.uuid;\n\t\tdata.type = this.type;\n\n\t\tif ( this.name !== '' ) data.name = this.name;\n\n\t\tif ( this.color && this.color.isColor ) data.color = this.color.getHex();\n\n\t\tif ( this.roughness !== undefined ) data.roughness = this.roughness;\n\t\tif ( this.metalness !== undefined ) data.metalness = this.metalness;\n\n\t\tif ( this.sheen && this.sheen.isColor ) data.sheen = this.sheen.getHex();\n\t\tif ( this.emissive && this.emissive.isColor ) data.emissive = this.emissive.getHex();\n\t\tif ( this.emissiveIntensity && this.emissiveIntensity !== 1 ) data.emissiveIntensity = this.emissiveIntensity;\n\n\t\tif ( this.specular && this.specular.isColor ) data.specular = this.specular.getHex();\n\t\tif ( this.shininess !== undefined ) data.shininess = this.shininess;\n\t\tif ( this.clearcoat !== undefined ) data.clearcoat = this.clearcoat;\n\t\tif ( this.clearcoatRoughness !== undefined ) data.clearcoatRoughness = this.clearcoatRoughness;\n\n\t\tif ( this.clearcoatMap && this.clearcoatMap.isTexture ) {\n\n\t\t\tdata.clearcoatMap = this.clearcoatMap.toJSON( meta ).uuid;\n\n\t\t}\n\n\t\tif ( this.clearcoatRoughnessMap && this.clearcoatRoughnessMap.isTexture ) {\n\n\t\t\tdata.clearcoatRoughnessMap = this.clearcoatRoughnessMap.toJSON( meta ).uuid;\n\n\t\t}\n\n\t\tif ( this.clearcoatNormalMap && this.clearcoatNormalMap.isTexture ) {\n\n\t\t\tdata.clearcoatNormalMap = this.clearcoatNormalMap.toJSON( meta ).uuid;\n\t\t\tdata.clearcoatNormalScale = this.clearcoatNormalScale.toArray();\n\n\t\t}\n\n\t\tif ( this.map && this.map.isTexture ) data.map = this.map.toJSON( meta ).uuid;\n\t\tif ( this.matcap && this.matcap.isTexture ) data.matcap = this.matcap.toJSON( meta ).uuid;\n\t\tif ( this.alphaMap && this.alphaMap.isTexture ) data.alphaMap = this.alphaMap.toJSON( meta ).uuid;\n\t\tif ( this.lightMap && this.lightMap.isTexture ) data.lightMap = this.lightMap.toJSON( meta ).uuid;\n\n\t\tif ( this.aoMap && this.aoMap.isTexture ) {\n\n\t\t\tdata.aoMap = this.aoMap.toJSON( meta ).uuid;\n\t\t\tdata.aoMapIntensity = this.aoMapIntensity;\n\n\t\t}\n\n\t\tif ( this.bumpMap && this.bumpMap.isTexture ) {\n\n\t\t\tdata.bumpMap = this.bumpMap.toJSON( meta ).uuid;\n\t\t\tdata.bumpScale = this.bumpScale;\n\n\t\t}\n\n\t\tif ( this.normalMap && this.normalMap.isTexture ) {\n\n\t\t\tdata.normalMap = this.normalMap.toJSON( meta ).uuid;\n\t\t\tdata.normalMapType = this.normalMapType;\n\t\t\tdata.normalScale = this.normalScale.toArray();\n\n\t\t}\n\n\t\tif ( this.displacementMap && this.displacementMap.isTexture ) {\n\n\t\t\tdata.displacementMap = this.displacementMap.toJSON( meta ).uuid;\n\t\t\tdata.displacementScale = this.displacementScale;\n\t\t\tdata.displacementBias = this.displacementBias;\n\n\t\t}\n\n\t\tif ( this.roughnessMap && this.roughnessMap.isTexture ) data.roughnessMap = this.roughnessMap.toJSON( meta ).uuid;\n\t\tif ( this.metalnessMap && this.metalnessMap.isTexture ) data.metalnessMap = this.metalnessMap.toJSON( meta ).uuid;\n\n\t\tif ( this.emissiveMap && this.emissiveMap.isTexture ) data.emissiveMap = this.emissiveMap.toJSON( meta ).uuid;\n\t\tif ( this.specularMap && this.specularMap.isTexture ) data.specularMap = this.specularMap.toJSON( meta ).uuid;\n\n\t\tif ( this.envMap && this.envMap.isTexture ) {\n\n\t\t\tdata.envMap = this.envMap.toJSON( meta ).uuid;\n\t\t\tdata.reflectivity = this.reflectivity; // Scale behind envMap\n\t\t\tdata.refractionRatio = this.refractionRatio;\n\n\t\t\tif ( this.combine !== undefined ) data.combine = this.combine;\n\t\t\tif ( this.envMapIntensity !== undefined ) data.envMapIntensity = this.envMapIntensity;\n\n\t\t}\n\n\t\tif ( this.gradientMap && this.gradientMap.isTexture ) {\n\n\t\t\tdata.gradientMap = this.gradientMap.toJSON( meta ).uuid;\n\n\t\t}\n\n\t\tif ( this.size !== undefined ) data.size = this.size;\n\t\tif ( this.sizeAttenuation !== undefined ) data.sizeAttenuation = this.sizeAttenuation;\n\n\t\tif ( this.blending !== NormalBlending ) data.blending = this.blending;\n\t\tif ( this.flatShading === true ) data.flatShading = this.flatShading;\n\t\tif ( this.side !== FrontSide ) data.side = this.side;\n\t\tif ( this.vertexColors ) data.vertexColors = true;\n\n\t\tif ( this.opacity < 1 ) data.opacity = this.opacity;\n\t\tif ( this.transparent === true ) data.transparent = this.transparent;\n\n\t\tdata.depthFunc = this.depthFunc;\n\t\tdata.depthTest = this.depthTest;\n\t\tdata.depthWrite = this.depthWrite;\n\n\t\tdata.stencilWrite = this.stencilWrite;\n\t\tdata.stencilWriteMask = this.stencilWriteMask;\n\t\tdata.stencilFunc = this.stencilFunc;\n\t\tdata.stencilRef = this.stencilRef;\n\t\tdata.stencilFuncMask = this.stencilFuncMask;\n\t\tdata.stencilFail = this.stencilFail;\n\t\tdata.stencilZFail = this.stencilZFail;\n\t\tdata.stencilZPass = this.stencilZPass;\n\n\t\t// rotation (SpriteMaterial)\n\t\tif ( this.rotation && this.rotation !== 0 ) data.rotation = this.rotation;\n\n\t\tif ( this.polygonOffset === true ) data.polygonOffset = true;\n\t\tif ( this.polygonOffsetFactor !== 0 ) data.polygonOffsetFactor = this.polygonOffsetFactor;\n\t\tif ( this.polygonOffsetUnits !== 0 ) data.polygonOffsetUnits = this.polygonOffsetUnits;\n\n\t\tif ( this.linewidth && this.linewidth !== 1 ) data.linewidth = this.linewidth;\n\t\tif ( this.dashSize !== undefined ) data.dashSize = this.dashSize;\n\t\tif ( this.gapSize !== undefined ) data.gapSize = this.gapSize;\n\t\tif ( this.scale !== undefined ) data.scale = this.scale;\n\n\t\tif ( this.dithering === true ) data.dithering = true;\n\n\t\tif ( this.alphaTest > 0 ) data.alphaTest = this.alphaTest;\n\t\tif ( this.premultipliedAlpha === true ) data.premultipliedAlpha = this.premultipliedAlpha;\n\n\t\tif ( this.wireframe === true ) data.wireframe = this.wireframe;\n\t\tif ( this.wireframeLinewidth > 1 ) data.wireframeLinewidth = this.wireframeLinewidth;\n\t\tif ( this.wireframeLinecap !== 'round' ) data.wireframeLinecap = this.wireframeLinecap;\n\t\tif ( this.wireframeLinejoin !== 'round' ) data.wireframeLinejoin = this.wireframeLinejoin;\n\n\t\tif ( this.morphTargets === true ) data.morphTargets = true;\n\t\tif ( this.morphNormals === true ) data.morphNormals = true;\n\t\tif ( this.skinning === true ) data.skinning = true;\n\n\t\tif ( this.visible === false ) data.visible = false;\n\n\t\tif ( this.toneMapped === false ) data.toneMapped = false;\n\n\t\tif ( JSON.stringify( this.userData ) !== '{}' ) data.userData = this.userData;\n\n\t\t// TODO: Copied from Object3D.toJSON\n\n\t\tfunction extractFromCache( cache ) {\n\n\t\t\tconst values = [];\n\n\t\t\tfor ( const key in cache ) {\n\n\t\t\t\tconst data = cache[ key ];\n\t\t\t\tdelete data.metadata;\n\t\t\t\tvalues.push( data );\n\n\t\t\t}\n\n\t\t\treturn values;\n\n\t\t}\n\n\t\tif ( isRoot ) {\n\n\t\t\tconst textures = extractFromCache( meta.textures );\n\t\t\tconst images = extractFromCache( meta.images );\n\n\t\t\tif ( textures.length > 0 ) data.textures = textures;\n\t\t\tif ( images.length > 0 ) data.images = images;\n\n\t\t}\n\n\t\treturn data;\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor().copy( this );\n\n\t},\n\n\tcopy: function ( source ) {\n\n\t\tthis.name = source.name;\n\n\t\tthis.fog = source.fog;\n\n\t\tthis.blending = source.blending;\n\t\tthis.side = source.side;\n\t\tthis.flatShading = source.flatShading;\n\t\tthis.vertexColors = source.vertexColors;\n\n\t\tthis.opacity = source.opacity;\n\t\tthis.transparent = source.transparent;\n\n\t\tthis.blendSrc = source.blendSrc;\n\t\tthis.blendDst = source.blendDst;\n\t\tthis.blendEquation = source.blendEquation;\n\t\tthis.blendSrcAlpha = source.blendSrcAlpha;\n\t\tthis.blendDstAlpha = source.blendDstAlpha;\n\t\tthis.blendEquationAlpha = source.blendEquationAlpha;\n\n\t\tthis.depthFunc = source.depthFunc;\n\t\tthis.depthTest = source.depthTest;\n\t\tthis.depthWrite = source.depthWrite;\n\n\t\tthis.stencilWriteMask = source.stencilWriteMask;\n\t\tthis.stencilFunc = source.stencilFunc;\n\t\tthis.stencilRef = source.stencilRef;\n\t\tthis.stencilFuncMask = source.stencilFuncMask;\n\t\tthis.stencilFail = source.stencilFail;\n\t\tthis.stencilZFail = source.stencilZFail;\n\t\tthis.stencilZPass = source.stencilZPass;\n\t\tthis.stencilWrite = source.stencilWrite;\n\n\t\tconst srcPlanes = source.clippingPlanes;\n\t\tlet dstPlanes = null;\n\n\t\tif ( srcPlanes !== null ) {\n\n\t\t\tconst n = srcPlanes.length;\n\t\t\tdstPlanes = new Array( n );\n\n\t\t\tfor ( let i = 0; i !== n; ++ i ) {\n\n\t\t\t\tdstPlanes[ i ] = srcPlanes[ i ].clone();\n\n\t\t\t}\n\n\t\t}\n\n\t\tthis.clippingPlanes = dstPlanes;\n\t\tthis.clipIntersection = source.clipIntersection;\n\t\tthis.clipShadows = source.clipShadows;\n\n\t\tthis.shadowSide = source.shadowSide;\n\n\t\tthis.colorWrite = source.colorWrite;\n\n\t\tthis.precision = source.precision;\n\n\t\tthis.polygonOffset = source.polygonOffset;\n\t\tthis.polygonOffsetFactor = source.polygonOffsetFactor;\n\t\tthis.polygonOffsetUnits = source.polygonOffsetUnits;\n\n\t\tthis.dithering = source.dithering;\n\n\t\tthis.alphaTest = source.alphaTest;\n\t\tthis.premultipliedAlpha = source.premultipliedAlpha;\n\n\t\tthis.visible = source.visible;\n\n\t\tthis.toneMapped = source.toneMapped;\n\n\t\tthis.userData = JSON.parse( JSON.stringify( source.userData ) );\n\n\t\treturn this;\n\n\t},\n\n\tdispose: function () {\n\n\t\tthis.dispatchEvent( { type: 'dispose' } );\n\n\t}\n\n} );\n\nObject.defineProperty( Material.prototype, 'needsUpdate', {\n\n\tset: function ( value ) {\n\n\t\tif ( value === true ) this.version ++;\n\n\t}\n\n} );\n\n/**\n * parameters = {\n *  color: <hex>,\n *  opacity: <float>,\n *  map: new THREE.Texture( <Image> ),\n *\n *  lightMap: new THREE.Texture( <Image> ),\n *  lightMapIntensity: <float>\n *\n *  aoMap: new THREE.Texture( <Image> ),\n *  aoMapIntensity: <float>\n *\n *  specularMap: new THREE.Texture( <Image> ),\n *\n *  alphaMap: new THREE.Texture( <Image> ),\n *\n *  envMap: new THREE.CubeTexture( [posx, negx, posy, negy, posz, negz] ),\n *  combine: THREE.Multiply,\n *  reflectivity: <float>,\n *  refractionRatio: <float>,\n *\n *  depthTest: <bool>,\n *  depthWrite: <bool>,\n *\n *  wireframe: <boolean>,\n *  wireframeLinewidth: <float>,\n *\n *  skinning: <bool>,\n *  morphTargets: <bool>\n * }\n */\n\nfunction MeshBasicMaterial( parameters ) {\n\n\tMaterial.call( this );\n\n\tthis.type = 'MeshBasicMaterial';\n\n\tthis.color = new Color( 0xffffff ); // emissive\n\n\tthis.map = null;\n\n\tthis.lightMap = null;\n\tthis.lightMapIntensity = 1.0;\n\n\tthis.aoMap = null;\n\tthis.aoMapIntensity = 1.0;\n\n\tthis.specularMap = null;\n\n\tthis.alphaMap = null;\n\n\tthis.envMap = null;\n\tthis.combine = MultiplyOperation;\n\tthis.reflectivity = 1;\n\tthis.refractionRatio = 0.98;\n\n\tthis.wireframe = false;\n\tthis.wireframeLinewidth = 1;\n\tthis.wireframeLinecap = 'round';\n\tthis.wireframeLinejoin = 'round';\n\n\tthis.skinning = false;\n\tthis.morphTargets = false;\n\n\tthis.setValues( parameters );\n\n}\n\nMeshBasicMaterial.prototype = Object.create( Material.prototype );\nMeshBasicMaterial.prototype.constructor = MeshBasicMaterial;\n\nMeshBasicMaterial.prototype.isMeshBasicMaterial = true;\n\nMeshBasicMaterial.prototype.copy = function ( source ) {\n\n\tMaterial.prototype.copy.call( this, source );\n\n\tthis.color.copy( source.color );\n\n\tthis.map = source.map;\n\n\tthis.lightMap = source.lightMap;\n\tthis.lightMapIntensity = source.lightMapIntensity;\n\n\tthis.aoMap = source.aoMap;\n\tthis.aoMapIntensity = source.aoMapIntensity;\n\n\tthis.specularMap = source.specularMap;\n\n\tthis.alphaMap = source.alphaMap;\n\n\tthis.envMap = source.envMap;\n\tthis.combine = source.combine;\n\tthis.reflectivity = source.reflectivity;\n\tthis.refractionRatio = source.refractionRatio;\n\n\tthis.wireframe = source.wireframe;\n\tthis.wireframeLinewidth = source.wireframeLinewidth;\n\tthis.wireframeLinecap = source.wireframeLinecap;\n\tthis.wireframeLinejoin = source.wireframeLinejoin;\n\n\tthis.skinning = source.skinning;\n\tthis.morphTargets = source.morphTargets;\n\n\treturn this;\n\n};\n\nconst _vector$3 = new Vector3();\nconst _vector2$1 = new Vector2();\n\nfunction BufferAttribute( array, itemSize, normalized ) {\n\n\tif ( Array.isArray( array ) ) {\n\n\t\tthrow new TypeError( 'THREE.BufferAttribute: array should be a Typed Array.' );\n\n\t}\n\n\tthis.name = '';\n\n\tthis.array = array;\n\tthis.itemSize = itemSize;\n\tthis.count = array !== undefined ? array.length / itemSize : 0;\n\tthis.normalized = normalized === true;\n\n\tthis.usage = StaticDrawUsage;\n\tthis.updateRange = { offset: 0, count: - 1 };\n\n\tthis.version = 0;\n\n}\n\nObject.defineProperty( BufferAttribute.prototype, 'needsUpdate', {\n\n\tset: function ( value ) {\n\n\t\tif ( value === true ) this.version ++;\n\n\t}\n\n} );\n\nObject.assign( BufferAttribute.prototype, {\n\n\tisBufferAttribute: true,\n\n\tonUploadCallback: function () {},\n\n\tsetUsage: function ( value ) {\n\n\t\tthis.usage = value;\n\n\t\treturn this;\n\n\t},\n\n\tcopy: function ( source ) {\n\n\t\tthis.name = source.name;\n\t\tthis.array = new source.array.constructor( source.array );\n\t\tthis.itemSize = source.itemSize;\n\t\tthis.count = source.count;\n\t\tthis.normalized = source.normalized;\n\n\t\tthis.usage = source.usage;\n\n\t\treturn this;\n\n\t},\n\n\tcopyAt: function ( index1, attribute, index2 ) {\n\n\t\tindex1 *= this.itemSize;\n\t\tindex2 *= attribute.itemSize;\n\n\t\tfor ( let i = 0, l = this.itemSize; i < l; i ++ ) {\n\n\t\t\tthis.array[ index1 + i ] = attribute.array[ index2 + i ];\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tcopyArray: function ( array ) {\n\n\t\tthis.array.set( array );\n\n\t\treturn this;\n\n\t},\n\n\tcopyColorsArray: function ( colors ) {\n\n\t\tconst array = this.array;\n\t\tlet offset = 0;\n\n\t\tfor ( let i = 0, l = colors.length; i < l; i ++ ) {\n\n\t\t\tlet color = colors[ i ];\n\n\t\t\tif ( color === undefined ) {\n\n\t\t\t\tconsole.warn( 'THREE.BufferAttribute.copyColorsArray(): color is undefined', i );\n\t\t\t\tcolor = new Color();\n\n\t\t\t}\n\n\t\t\tarray[ offset ++ ] = color.r;\n\t\t\tarray[ offset ++ ] = color.g;\n\t\t\tarray[ offset ++ ] = color.b;\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tcopyVector2sArray: function ( vectors ) {\n\n\t\tconst array = this.array;\n\t\tlet offset = 0;\n\n\t\tfor ( let i = 0, l = vectors.length; i < l; i ++ ) {\n\n\t\t\tlet vector = vectors[ i ];\n\n\t\t\tif ( vector === undefined ) {\n\n\t\t\t\tconsole.warn( 'THREE.BufferAttribute.copyVector2sArray(): vector is undefined', i );\n\t\t\t\tvector = new Vector2();\n\n\t\t\t}\n\n\t\t\tarray[ offset ++ ] = vector.x;\n\t\t\tarray[ offset ++ ] = vector.y;\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tcopyVector3sArray: function ( vectors ) {\n\n\t\tconst array = this.array;\n\t\tlet offset = 0;\n\n\t\tfor ( let i = 0, l = vectors.length; i < l; i ++ ) {\n\n\t\t\tlet vector = vectors[ i ];\n\n\t\t\tif ( vector === undefined ) {\n\n\t\t\t\tconsole.warn( 'THREE.BufferAttribute.copyVector3sArray(): vector is undefined', i );\n\t\t\t\tvector = new Vector3();\n\n\t\t\t}\n\n\t\t\tarray[ offset ++ ] = vector.x;\n\t\t\tarray[ offset ++ ] = vector.y;\n\t\t\tarray[ offset ++ ] = vector.z;\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tcopyVector4sArray: function ( vectors ) {\n\n\t\tconst array = this.array;\n\t\tlet offset = 0;\n\n\t\tfor ( let i = 0, l = vectors.length; i < l; i ++ ) {\n\n\t\t\tlet vector = vectors[ i ];\n\n\t\t\tif ( vector === undefined ) {\n\n\t\t\t\tconsole.warn( 'THREE.BufferAttribute.copyVector4sArray(): vector is undefined', i );\n\t\t\t\tvector = new Vector4();\n\n\t\t\t}\n\n\t\t\tarray[ offset ++ ] = vector.x;\n\t\t\tarray[ offset ++ ] = vector.y;\n\t\t\tarray[ offset ++ ] = vector.z;\n\t\t\tarray[ offset ++ ] = vector.w;\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tapplyMatrix3: function ( m ) {\n\n\t\tif ( this.itemSize === 2 ) {\n\n\t\t\tfor ( let i = 0, l = this.count; i < l; i ++ ) {\n\n\t\t\t\t_vector2$1.fromBufferAttribute( this, i );\n\t\t\t\t_vector2$1.applyMatrix3( m );\n\n\t\t\t\tthis.setXY( i, _vector2$1.x, _vector2$1.y );\n\n\t\t\t}\n\n\t\t} else if ( this.itemSize === 3 ) {\n\n\t\t\tfor ( let i = 0, l = this.count; i < l; i ++ ) {\n\n\t\t\t\t_vector$3.fromBufferAttribute( this, i );\n\t\t\t\t_vector$3.applyMatrix3( m );\n\n\t\t\t\tthis.setXYZ( i, _vector$3.x, _vector$3.y, _vector$3.z );\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tapplyMatrix4: function ( m ) {\n\n\t\tfor ( let i = 0, l = this.count; i < l; i ++ ) {\n\n\t\t\t_vector$3.x = this.getX( i );\n\t\t\t_vector$3.y = this.getY( i );\n\t\t\t_vector$3.z = this.getZ( i );\n\n\t\t\t_vector$3.applyMatrix4( m );\n\n\t\t\tthis.setXYZ( i, _vector$3.x, _vector$3.y, _vector$3.z );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tapplyNormalMatrix: function ( m ) {\n\n\t\tfor ( let i = 0, l = this.count; i < l; i ++ ) {\n\n\t\t\t_vector$3.x = this.getX( i );\n\t\t\t_vector$3.y = this.getY( i );\n\t\t\t_vector$3.z = this.getZ( i );\n\n\t\t\t_vector$3.applyNormalMatrix( m );\n\n\t\t\tthis.setXYZ( i, _vector$3.x, _vector$3.y, _vector$3.z );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\ttransformDirection: function ( m ) {\n\n\t\tfor ( let i = 0, l = this.count; i < l; i ++ ) {\n\n\t\t\t_vector$3.x = this.getX( i );\n\t\t\t_vector$3.y = this.getY( i );\n\t\t\t_vector$3.z = this.getZ( i );\n\n\t\t\t_vector$3.transformDirection( m );\n\n\t\t\tthis.setXYZ( i, _vector$3.x, _vector$3.y, _vector$3.z );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tset: function ( value, offset = 0 ) {\n\n\t\tthis.array.set( value, offset );\n\n\t\treturn this;\n\n\t},\n\n\tgetX: function ( index ) {\n\n\t\treturn this.array[ index * this.itemSize ];\n\n\t},\n\n\tsetX: function ( index, x ) {\n\n\t\tthis.array[ index * this.itemSize ] = x;\n\n\t\treturn this;\n\n\t},\n\n\tgetY: function ( index ) {\n\n\t\treturn this.array[ index * this.itemSize + 1 ];\n\n\t},\n\n\tsetY: function ( index, y ) {\n\n\t\tthis.array[ index * this.itemSize + 1 ] = y;\n\n\t\treturn this;\n\n\t},\n\n\tgetZ: function ( index ) {\n\n\t\treturn this.array[ index * this.itemSize + 2 ];\n\n\t},\n\n\tsetZ: function ( index, z ) {\n\n\t\tthis.array[ index * this.itemSize + 2 ] = z;\n\n\t\treturn this;\n\n\t},\n\n\tgetW: function ( index ) {\n\n\t\treturn this.array[ index * this.itemSize + 3 ];\n\n\t},\n\n\tsetW: function ( index, w ) {\n\n\t\tthis.array[ index * this.itemSize + 3 ] = w;\n\n\t\treturn this;\n\n\t},\n\n\tsetXY: function ( index, x, y ) {\n\n\t\tindex *= this.itemSize;\n\n\t\tthis.array[ index + 0 ] = x;\n\t\tthis.array[ index + 1 ] = y;\n\n\t\treturn this;\n\n\t},\n\n\tsetXYZ: function ( index, x, y, z ) {\n\n\t\tindex *= this.itemSize;\n\n\t\tthis.array[ index + 0 ] = x;\n\t\tthis.array[ index + 1 ] = y;\n\t\tthis.array[ index + 2 ] = z;\n\n\t\treturn this;\n\n\t},\n\n\tsetXYZW: function ( index, x, y, z, w ) {\n\n\t\tindex *= this.itemSize;\n\n\t\tthis.array[ index + 0 ] = x;\n\t\tthis.array[ index + 1 ] = y;\n\t\tthis.array[ index + 2 ] = z;\n\t\tthis.array[ index + 3 ] = w;\n\n\t\treturn this;\n\n\t},\n\n\tonUpload: function ( callback ) {\n\n\t\tthis.onUploadCallback = callback;\n\n\t\treturn this;\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor( this.array, this.itemSize ).copy( this );\n\n\t},\n\n\ttoJSON: function () {\n\n\t\treturn {\n\t\t\titemSize: this.itemSize,\n\t\t\ttype: this.array.constructor.name,\n\t\t\tarray: Array.prototype.slice.call( this.array ),\n\t\t\tnormalized: this.normalized\n\t\t};\n\n\t}\n\n} );\n\n//\n\nfunction Int8BufferAttribute( array, itemSize, normalized ) {\n\n\tBufferAttribute.call( this, new Int8Array( array ), itemSize, normalized );\n\n}\n\nInt8BufferAttribute.prototype = Object.create( BufferAttribute.prototype );\nInt8BufferAttribute.prototype.constructor = Int8BufferAttribute;\n\n\nfunction Uint8BufferAttribute( array, itemSize, normalized ) {\n\n\tBufferAttribute.call( this, new Uint8Array( array ), itemSize, normalized );\n\n}\n\nUint8BufferAttribute.prototype = Object.create( BufferAttribute.prototype );\nUint8BufferAttribute.prototype.constructor = Uint8BufferAttribute;\n\n\nfunction Uint8ClampedBufferAttribute( array, itemSize, normalized ) {\n\n\tBufferAttribute.call( this, new Uint8ClampedArray( array ), itemSize, normalized );\n\n}\n\nUint8ClampedBufferAttribute.prototype = Object.create( BufferAttribute.prototype );\nUint8ClampedBufferAttribute.prototype.constructor = Uint8ClampedBufferAttribute;\n\n\nfunction Int16BufferAttribute( array, itemSize, normalized ) {\n\n\tBufferAttribute.call( this, new Int16Array( array ), itemSize, normalized );\n\n}\n\nInt16BufferAttribute.prototype = Object.create( BufferAttribute.prototype );\nInt16BufferAttribute.prototype.constructor = Int16BufferAttribute;\n\n\nfunction Uint16BufferAttribute( array, itemSize, normalized ) {\n\n\tBufferAttribute.call( this, new Uint16Array( array ), itemSize, normalized );\n\n}\n\nUint16BufferAttribute.prototype = Object.create( BufferAttribute.prototype );\nUint16BufferAttribute.prototype.constructor = Uint16BufferAttribute;\n\n\nfunction Int32BufferAttribute( array, itemSize, normalized ) {\n\n\tBufferAttribute.call( this, new Int32Array( array ), itemSize, normalized );\n\n}\n\nInt32BufferAttribute.prototype = Object.create( BufferAttribute.prototype );\nInt32BufferAttribute.prototype.constructor = Int32BufferAttribute;\n\n\nfunction Uint32BufferAttribute( array, itemSize, normalized ) {\n\n\tBufferAttribute.call( this, new Uint32Array( array ), itemSize, normalized );\n\n}\n\nUint32BufferAttribute.prototype = Object.create( BufferAttribute.prototype );\nUint32BufferAttribute.prototype.constructor = Uint32BufferAttribute;\n\nfunction Float16BufferAttribute( array, itemSize, normalized ) {\n\n\tBufferAttribute.call( this, new Uint16Array( array ), itemSize, normalized );\n\n}\n\nFloat16BufferAttribute.prototype = Object.create( BufferAttribute.prototype );\nFloat16BufferAttribute.prototype.constructor = Float16BufferAttribute;\nFloat16BufferAttribute.prototype.isFloat16BufferAttribute = true;\n\nfunction Float32BufferAttribute( array, itemSize, normalized ) {\n\n\tBufferAttribute.call( this, new Float32Array( array ), itemSize, normalized );\n\n}\n\nFloat32BufferAttribute.prototype = Object.create( BufferAttribute.prototype );\nFloat32BufferAttribute.prototype.constructor = Float32BufferAttribute;\n\n\nfunction Float64BufferAttribute( array, itemSize, normalized ) {\n\n\tBufferAttribute.call( this, new Float64Array( array ), itemSize, normalized );\n\n}\n\nFloat64BufferAttribute.prototype = Object.create( BufferAttribute.prototype );\nFloat64BufferAttribute.prototype.constructor = Float64BufferAttribute;\n\nfunction arrayMax( array ) {\n\n\tif ( array.length === 0 ) return - Infinity;\n\n\tlet max = array[ 0 ];\n\n\tfor ( let i = 1, l = array.length; i < l; ++ i ) {\n\n\t\tif ( array[ i ] > max ) max = array[ i ];\n\n\t}\n\n\treturn max;\n\n}\n\nconst TYPED_ARRAYS = {\n\tInt8Array: Int8Array,\n\tUint8Array: Uint8Array,\n\t// Workaround for IE11 pre KB2929437. See #11440\n\tUint8ClampedArray: typeof Uint8ClampedArray !== 'undefined' ? Uint8ClampedArray : Uint8Array,\n\tInt16Array: Int16Array,\n\tUint16Array: Uint16Array,\n\tInt32Array: Int32Array,\n\tUint32Array: Uint32Array,\n\tFloat32Array: Float32Array,\n\tFloat64Array: Float64Array\n};\n\nfunction getTypedArray( type, buffer ) {\n\n\treturn new TYPED_ARRAYS[ type ]( buffer );\n\n}\n\nlet _id = 0;\n\nconst _m1$2 = new Matrix4();\nconst _obj = new Object3D();\nconst _offset = new Vector3();\nconst _box$2 = new Box3();\nconst _boxMorphTargets = new Box3();\nconst _vector$4 = new Vector3();\n\nfunction BufferGeometry() {\n\n\tObject.defineProperty( this, 'id', { value: _id ++ } );\n\n\tthis.uuid = MathUtils.generateUUID();\n\n\tthis.name = '';\n\tthis.type = 'BufferGeometry';\n\n\tthis.index = null;\n\tthis.attributes = {};\n\n\tthis.morphAttributes = {};\n\tthis.morphTargetsRelative = false;\n\n\tthis.groups = [];\n\n\tthis.boundingBox = null;\n\tthis.boundingSphere = null;\n\n\tthis.drawRange = { start: 0, count: Infinity };\n\n\tthis.userData = {};\n\n}\n\nBufferGeometry.prototype = Object.assign( Object.create( EventDispatcher.prototype ), {\n\n\tconstructor: BufferGeometry,\n\n\tisBufferGeometry: true,\n\n\tgetIndex: function () {\n\n\t\treturn this.index;\n\n\t},\n\n\tsetIndex: function ( index ) {\n\n\t\tif ( Array.isArray( index ) ) {\n\n\t\t\tthis.index = new ( arrayMax( index ) > 65535 ? Uint32BufferAttribute : Uint16BufferAttribute )( index, 1 );\n\n\t\t} else {\n\n\t\t\tthis.index = index;\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tgetAttribute: function ( name ) {\n\n\t\treturn this.attributes[ name ];\n\n\t},\n\n\tsetAttribute: function ( name, attribute ) {\n\n\t\tthis.attributes[ name ] = attribute;\n\n\t\treturn this;\n\n\t},\n\n\tdeleteAttribute: function ( name ) {\n\n\t\tdelete this.attributes[ name ];\n\n\t\treturn this;\n\n\t},\n\n\thasAttribute: function ( name ) {\n\n\t\treturn this.attributes[ name ] !== undefined;\n\n\t},\n\n\taddGroup: function ( start, count, materialIndex = 0 ) {\n\n\t\tthis.groups.push( {\n\n\t\t\tstart: start,\n\t\t\tcount: count,\n\t\t\tmaterialIndex: materialIndex\n\n\t\t} );\n\n\t},\n\n\tclearGroups: function () {\n\n\t\tthis.groups = [];\n\n\t},\n\n\tsetDrawRange: function ( start, count ) {\n\n\t\tthis.drawRange.start = start;\n\t\tthis.drawRange.count = count;\n\n\t},\n\n\tapplyMatrix4: function ( matrix ) {\n\n\t\tconst position = this.attributes.position;\n\n\t\tif ( position !== undefined ) {\n\n\t\t\tposition.applyMatrix4( matrix );\n\n\t\t\tposition.needsUpdate = true;\n\n\t\t}\n\n\t\tconst normal = this.attributes.normal;\n\n\t\tif ( normal !== undefined ) {\n\n\t\t\tconst normalMatrix = new Matrix3().getNormalMatrix( matrix );\n\n\t\t\tnormal.applyNormalMatrix( normalMatrix );\n\n\t\t\tnormal.needsUpdate = true;\n\n\t\t}\n\n\t\tconst tangent = this.attributes.tangent;\n\n\t\tif ( tangent !== undefined ) {\n\n\t\t\ttangent.transformDirection( matrix );\n\n\t\t\ttangent.needsUpdate = true;\n\n\t\t}\n\n\t\tif ( this.boundingBox !== null ) {\n\n\t\t\tthis.computeBoundingBox();\n\n\t\t}\n\n\t\tif ( this.boundingSphere !== null ) {\n\n\t\t\tthis.computeBoundingSphere();\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\trotateX: function ( angle ) {\n\n\t\t// rotate geometry around world x-axis\n\n\t\t_m1$2.makeRotationX( angle );\n\n\t\tthis.applyMatrix4( _m1$2 );\n\n\t\treturn this;\n\n\t},\n\n\trotateY: function ( angle ) {\n\n\t\t// rotate geometry around world y-axis\n\n\t\t_m1$2.makeRotationY( angle );\n\n\t\tthis.applyMatrix4( _m1$2 );\n\n\t\treturn this;\n\n\t},\n\n\trotateZ: function ( angle ) {\n\n\t\t// rotate geometry around world z-axis\n\n\t\t_m1$2.makeRotationZ( angle );\n\n\t\tthis.applyMatrix4( _m1$2 );\n\n\t\treturn this;\n\n\t},\n\n\ttranslate: function ( x, y, z ) {\n\n\t\t// translate geometry\n\n\t\t_m1$2.makeTranslation( x, y, z );\n\n\t\tthis.applyMatrix4( _m1$2 );\n\n\t\treturn this;\n\n\t},\n\n\tscale: function ( x, y, z ) {\n\n\t\t// scale geometry\n\n\t\t_m1$2.makeScale( x, y, z );\n\n\t\tthis.applyMatrix4( _m1$2 );\n\n\t\treturn this;\n\n\t},\n\n\tlookAt: function ( vector ) {\n\n\t\t_obj.lookAt( vector );\n\n\t\t_obj.updateMatrix();\n\n\t\tthis.applyMatrix4( _obj.matrix );\n\n\t\treturn this;\n\n\t},\n\n\tcenter: function () {\n\n\t\tthis.computeBoundingBox();\n\n\t\tthis.boundingBox.getCenter( _offset ).negate();\n\n\t\tthis.translate( _offset.x, _offset.y, _offset.z );\n\n\t\treturn this;\n\n\t},\n\n\tsetFromPoints: function ( points ) {\n\n\t\tconst position = [];\n\n\t\tfor ( let i = 0, l = points.length; i < l; i ++ ) {\n\n\t\t\tconst point = points[ i ];\n\t\t\tposition.push( point.x, point.y, point.z || 0 );\n\n\t\t}\n\n\t\tthis.setAttribute( 'position', new Float32BufferAttribute( position, 3 ) );\n\n\t\treturn this;\n\n\t},\n\n\tcomputeBoundingBox: function () {\n\n\t\tif ( this.boundingBox === null ) {\n\n\t\t\tthis.boundingBox = new Box3();\n\n\t\t}\n\n\t\tconst position = this.attributes.position;\n\t\tconst morphAttributesPosition = this.morphAttributes.position;\n\n\t\tif ( position && position.isGLBufferAttribute ) {\n\n\t\t\tconsole.error( 'THREE.BufferGeometry.computeBoundingBox(): GLBufferAttribute requires a manual bounding box. Alternatively set \"mesh.frustumCulled\" to \"false\".', this );\n\n\t\t\tthis.boundingBox.set(\n\t\t\t\tnew Vector3( - Infinity, - Infinity, - Infinity ),\n\t\t\t\tnew Vector3( + Infinity, + Infinity, + Infinity )\n\t\t\t);\n\n\t\t\treturn;\n\n\t\t}\n\n\t\tif ( position !== undefined ) {\n\n\t\t\tthis.boundingBox.setFromBufferAttribute( position );\n\n\t\t\t// process morph attributes if present\n\n\t\t\tif ( morphAttributesPosition ) {\n\n\t\t\t\tfor ( let i = 0, il = morphAttributesPosition.length; i < il; i ++ ) {\n\n\t\t\t\t\tconst morphAttribute = morphAttributesPosition[ i ];\n\t\t\t\t\t_box$2.setFromBufferAttribute( morphAttribute );\n\n\t\t\t\t\tif ( this.morphTargetsRelative ) {\n\n\t\t\t\t\t\t_vector$4.addVectors( this.boundingBox.min, _box$2.min );\n\t\t\t\t\t\tthis.boundingBox.expandByPoint( _vector$4 );\n\n\t\t\t\t\t\t_vector$4.addVectors( this.boundingBox.max, _box$2.max );\n\t\t\t\t\t\tthis.boundingBox.expandByPoint( _vector$4 );\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\tthis.boundingBox.expandByPoint( _box$2.min );\n\t\t\t\t\t\tthis.boundingBox.expandByPoint( _box$2.max );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\tthis.boundingBox.makeEmpty();\n\n\t\t}\n\n\t\tif ( isNaN( this.boundingBox.min.x ) || isNaN( this.boundingBox.min.y ) || isNaN( this.boundingBox.min.z ) ) {\n\n\t\t\tconsole.error( 'THREE.BufferGeometry.computeBoundingBox(): Computed min/max have NaN values. The \"position\" attribute is likely to have NaN values.', this );\n\n\t\t}\n\n\t},\n\n\tcomputeBoundingSphere: function () {\n\n\t\tif ( this.boundingSphere === null ) {\n\n\t\t\tthis.boundingSphere = new Sphere();\n\n\t\t}\n\n\t\tconst position = this.attributes.position;\n\t\tconst morphAttributesPosition = this.morphAttributes.position;\n\n\t\tif ( position && position.isGLBufferAttribute ) {\n\n\t\t\tconsole.error( 'THREE.BufferGeometry.computeBoundingSphere(): GLBufferAttribute requires a manual bounding sphere. Alternatively set \"mesh.frustumCulled\" to \"false\".', this );\n\n\t\t\tthis.boundingSphere.set( new Vector3(), Infinity );\n\n\t\t\treturn;\n\n\t\t}\n\n\t\tif ( position ) {\n\n\t\t\t// first, find the center of the bounding sphere\n\n\t\t\tconst center = this.boundingSphere.center;\n\n\t\t\t_box$2.setFromBufferAttribute( position );\n\n\t\t\t// process morph attributes if present\n\n\t\t\tif ( morphAttributesPosition ) {\n\n\t\t\t\tfor ( let i = 0, il = morphAttributesPosition.length; i < il; i ++ ) {\n\n\t\t\t\t\tconst morphAttribute = morphAttributesPosition[ i ];\n\t\t\t\t\t_boxMorphTargets.setFromBufferAttribute( morphAttribute );\n\n\t\t\t\t\tif ( this.morphTargetsRelative ) {\n\n\t\t\t\t\t\t_vector$4.addVectors( _box$2.min, _boxMorphTargets.min );\n\t\t\t\t\t\t_box$2.expandByPoint( _vector$4 );\n\n\t\t\t\t\t\t_vector$4.addVectors( _box$2.max, _boxMorphTargets.max );\n\t\t\t\t\t\t_box$2.expandByPoint( _vector$4 );\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\t_box$2.expandByPoint( _boxMorphTargets.min );\n\t\t\t\t\t\t_box$2.expandByPoint( _boxMorphTargets.max );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\t_box$2.getCenter( center );\n\n\t\t\t// second, try to find a boundingSphere with a radius smaller than the\n\t\t\t// boundingSphere of the boundingBox: sqrt(3) smaller in the best case\n\n\t\t\tlet maxRadiusSq = 0;\n\n\t\t\tfor ( let i = 0, il = position.count; i < il; i ++ ) {\n\n\t\t\t\t_vector$4.fromBufferAttribute( position, i );\n\n\t\t\t\tmaxRadiusSq = Math.max( maxRadiusSq, center.distanceToSquared( _vector$4 ) );\n\n\t\t\t}\n\n\t\t\t// process morph attributes if present\n\n\t\t\tif ( morphAttributesPosition ) {\n\n\t\t\t\tfor ( let i = 0, il = morphAttributesPosition.length; i < il; i ++ ) {\n\n\t\t\t\t\tconst morphAttribute = morphAttributesPosition[ i ];\n\t\t\t\t\tconst morphTargetsRelative = this.morphTargetsRelative;\n\n\t\t\t\t\tfor ( let j = 0, jl = morphAttribute.count; j < jl; j ++ ) {\n\n\t\t\t\t\t\t_vector$4.fromBufferAttribute( morphAttribute, j );\n\n\t\t\t\t\t\tif ( morphTargetsRelative ) {\n\n\t\t\t\t\t\t\t_offset.fromBufferAttribute( position, j );\n\t\t\t\t\t\t\t_vector$4.add( _offset );\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tmaxRadiusSq = Math.max( maxRadiusSq, center.distanceToSquared( _vector$4 ) );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tthis.boundingSphere.radius = Math.sqrt( maxRadiusSq );\n\n\t\t\tif ( isNaN( this.boundingSphere.radius ) ) {\n\n\t\t\t\tconsole.error( 'THREE.BufferGeometry.computeBoundingSphere(): Computed radius is NaN. The \"position\" attribute is likely to have NaN values.', this );\n\n\t\t\t}\n\n\t\t}\n\n\t},\n\n\tcomputeFaceNormals: function () {\n\n\t\t// backwards compatibility\n\n\t},\n\n\tcomputeTangents: function () {\n\n\t\tconst index = this.index;\n\t\tconst attributes = this.attributes;\n\n\t\t// based on http://www.terathon.com/code/tangent.html\n\t\t// (per vertex tangents)\n\n\t\tif ( index === null ||\n\t\t\t attributes.position === undefined ||\n\t\t\t attributes.normal === undefined ||\n\t\t\t attributes.uv === undefined ) {\n\n\t\t\tconsole.error( 'THREE.BufferGeometry: .computeTangents() failed. Missing required attributes (index, position, normal or uv)' );\n\t\t\treturn;\n\n\t\t}\n\n\t\tconst indices = index.array;\n\t\tconst positions = attributes.position.array;\n\t\tconst normals = attributes.normal.array;\n\t\tconst uvs = attributes.uv.array;\n\n\t\tconst nVertices = positions.length / 3;\n\n\t\tif ( attributes.tangent === undefined ) {\n\n\t\t\tthis.setAttribute( 'tangent', new BufferAttribute( new Float32Array( 4 * nVertices ), 4 ) );\n\n\t\t}\n\n\t\tconst tangents = attributes.tangent.array;\n\n\t\tconst tan1 = [], tan2 = [];\n\n\t\tfor ( let i = 0; i < nVertices; i ++ ) {\n\n\t\t\ttan1[ i ] = new Vector3();\n\t\t\ttan2[ i ] = new Vector3();\n\n\t\t}\n\n\t\tconst vA = new Vector3(),\n\t\t\tvB = new Vector3(),\n\t\t\tvC = new Vector3(),\n\n\t\t\tuvA = new Vector2(),\n\t\t\tuvB = new Vector2(),\n\t\t\tuvC = new Vector2(),\n\n\t\t\tsdir = new Vector3(),\n\t\t\ttdir = new Vector3();\n\n\t\tfunction handleTriangle( a, b, c ) {\n\n\t\t\tvA.fromArray( positions, a * 3 );\n\t\t\tvB.fromArray( positions, b * 3 );\n\t\t\tvC.fromArray( positions, c * 3 );\n\n\t\t\tuvA.fromArray( uvs, a * 2 );\n\t\t\tuvB.fromArray( uvs, b * 2 );\n\t\t\tuvC.fromArray( uvs, c * 2 );\n\n\t\t\tvB.sub( vA );\n\t\t\tvC.sub( vA );\n\n\t\t\tuvB.sub( uvA );\n\t\t\tuvC.sub( uvA );\n\n\t\t\tconst r = 1.0 / ( uvB.x * uvC.y - uvC.x * uvB.y );\n\n\t\t\t// silently ignore degenerate uv triangles having coincident or colinear vertices\n\n\t\t\tif ( ! isFinite( r ) ) return;\n\n\t\t\tsdir.copy( vB ).multiplyScalar( uvC.y ).addScaledVector( vC, - uvB.y ).multiplyScalar( r );\n\t\t\ttdir.copy( vC ).multiplyScalar( uvB.x ).addScaledVector( vB, - uvC.x ).multiplyScalar( r );\n\n\t\t\ttan1[ a ].add( sdir );\n\t\t\ttan1[ b ].add( sdir );\n\t\t\ttan1[ c ].add( sdir );\n\n\t\t\ttan2[ a ].add( tdir );\n\t\t\ttan2[ b ].add( tdir );\n\t\t\ttan2[ c ].add( tdir );\n\n\t\t}\n\n\t\tlet groups = this.groups;\n\n\t\tif ( groups.length === 0 ) {\n\n\t\t\tgroups = [ {\n\t\t\t\tstart: 0,\n\t\t\t\tcount: indices.length\n\t\t\t} ];\n\n\t\t}\n\n\t\tfor ( let i = 0, il = groups.length; i < il; ++ i ) {\n\n\t\t\tconst group = groups[ i ];\n\n\t\t\tconst start = group.start;\n\t\t\tconst count = group.count;\n\n\t\t\tfor ( let j = start, jl = start + count; j < jl; j += 3 ) {\n\n\t\t\t\thandleTriangle(\n\t\t\t\t\tindices[ j + 0 ],\n\t\t\t\t\tindices[ j + 1 ],\n\t\t\t\t\tindices[ j + 2 ]\n\t\t\t\t);\n\n\t\t\t}\n\n\t\t}\n\n\t\tconst tmp = new Vector3(), tmp2 = new Vector3();\n\t\tconst n = new Vector3(), n2 = new Vector3();\n\n\t\tfunction handleVertex( v ) {\n\n\t\t\tn.fromArray( normals, v * 3 );\n\t\t\tn2.copy( n );\n\n\t\t\tconst t = tan1[ v ];\n\n\t\t\t// Gram-Schmidt orthogonalize\n\n\t\t\ttmp.copy( t );\n\t\t\ttmp.sub( n.multiplyScalar( n.dot( t ) ) ).normalize();\n\n\t\t\t// Calculate handedness\n\n\t\t\ttmp2.crossVectors( n2, t );\n\t\t\tconst test = tmp2.dot( tan2[ v ] );\n\t\t\tconst w = ( test < 0.0 ) ? - 1.0 : 1.0;\n\n\t\t\ttangents[ v * 4 ] = tmp.x;\n\t\t\ttangents[ v * 4 + 1 ] = tmp.y;\n\t\t\ttangents[ v * 4 + 2 ] = tmp.z;\n\t\t\ttangents[ v * 4 + 3 ] = w;\n\n\t\t}\n\n\t\tfor ( let i = 0, il = groups.length; i < il; ++ i ) {\n\n\t\t\tconst group = groups[ i ];\n\n\t\t\tconst start = group.start;\n\t\t\tconst count = group.count;\n\n\t\t\tfor ( let j = start, jl = start + count; j < jl; j += 3 ) {\n\n\t\t\t\thandleVertex( indices[ j + 0 ] );\n\t\t\t\thandleVertex( indices[ j + 1 ] );\n\t\t\t\thandleVertex( indices[ j + 2 ] );\n\n\t\t\t}\n\n\t\t}\n\n\t},\n\n\tcomputeVertexNormals: function () {\n\n\t\tconst index = this.index;\n\t\tconst positionAttribute = this.getAttribute( 'position' );\n\n\t\tif ( positionAttribute !== undefined ) {\n\n\t\t\tlet normalAttribute = this.getAttribute( 'normal' );\n\n\t\t\tif ( normalAttribute === undefined ) {\n\n\t\t\t\tnormalAttribute = new BufferAttribute( new Float32Array( positionAttribute.count * 3 ), 3 );\n\t\t\t\tthis.setAttribute( 'normal', normalAttribute );\n\n\t\t\t} else {\n\n\t\t\t\t// reset existing normals to zero\n\n\t\t\t\tfor ( let i = 0, il = normalAttribute.count; i < il; i ++ ) {\n\n\t\t\t\t\tnormalAttribute.setXYZ( i, 0, 0, 0 );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tconst pA = new Vector3(), pB = new Vector3(), pC = new Vector3();\n\t\t\tconst nA = new Vector3(), nB = new Vector3(), nC = new Vector3();\n\t\t\tconst cb = new Vector3(), ab = new Vector3();\n\n\t\t\t// indexed elements\n\n\t\t\tif ( index ) {\n\n\t\t\t\tfor ( let i = 0, il = index.count; i < il; i += 3 ) {\n\n\t\t\t\t\tconst vA = index.getX( i + 0 );\n\t\t\t\t\tconst vB = index.getX( i + 1 );\n\t\t\t\t\tconst vC = index.getX( i + 2 );\n\n\t\t\t\t\tpA.fromBufferAttribute( positionAttribute, vA );\n\t\t\t\t\tpB.fromBufferAttribute( positionAttribute, vB );\n\t\t\t\t\tpC.fromBufferAttribute( positionAttribute, vC );\n\n\t\t\t\t\tcb.subVectors( pC, pB );\n\t\t\t\t\tab.subVectors( pA, pB );\n\t\t\t\t\tcb.cross( ab );\n\n\t\t\t\t\tnA.fromBufferAttribute( normalAttribute, vA );\n\t\t\t\t\tnB.fromBufferAttribute( normalAttribute, vB );\n\t\t\t\t\tnC.fromBufferAttribute( normalAttribute, vC );\n\n\t\t\t\t\tnA.add( cb );\n\t\t\t\t\tnB.add( cb );\n\t\t\t\t\tnC.add( cb );\n\n\t\t\t\t\tnormalAttribute.setXYZ( vA, nA.x, nA.y, nA.z );\n\t\t\t\t\tnormalAttribute.setXYZ( vB, nB.x, nB.y, nB.z );\n\t\t\t\t\tnormalAttribute.setXYZ( vC, nC.x, nC.y, nC.z );\n\n\t\t\t\t}\n\n\t\t\t} else {\n\n\t\t\t\t// non-indexed elements (unconnected triangle soup)\n\n\t\t\t\tfor ( let i = 0, il = positionAttribute.count; i < il; i += 3 ) {\n\n\t\t\t\t\tpA.fromBufferAttribute( positionAttribute, i + 0 );\n\t\t\t\t\tpB.fromBufferAttribute( positionAttribute, i + 1 );\n\t\t\t\t\tpC.fromBufferAttribute( positionAttribute, i + 2 );\n\n\t\t\t\t\tcb.subVectors( pC, pB );\n\t\t\t\t\tab.subVectors( pA, pB );\n\t\t\t\t\tcb.cross( ab );\n\n\t\t\t\t\tnormalAttribute.setXYZ( i + 0, cb.x, cb.y, cb.z );\n\t\t\t\t\tnormalAttribute.setXYZ( i + 1, cb.x, cb.y, cb.z );\n\t\t\t\t\tnormalAttribute.setXYZ( i + 2, cb.x, cb.y, cb.z );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tthis.normalizeNormals();\n\n\t\t\tnormalAttribute.needsUpdate = true;\n\n\t\t}\n\n\t},\n\n\tmerge: function ( geometry, offset ) {\n\n\t\tif ( ! ( geometry && geometry.isBufferGeometry ) ) {\n\n\t\t\tconsole.error( 'THREE.BufferGeometry.merge(): geometry not an instance of THREE.BufferGeometry.', geometry );\n\t\t\treturn;\n\n\t\t}\n\n\t\tif ( offset === undefined ) {\n\n\t\t\toffset = 0;\n\n\t\t\tconsole.warn(\n\t\t\t\t'THREE.BufferGeometry.merge(): Overwriting original geometry, starting at offset=0. '\n\t\t\t\t+ 'Use BufferGeometryUtils.mergeBufferGeometries() for lossless merge.'\n\t\t\t);\n\n\t\t}\n\n\t\tconst attributes = this.attributes;\n\n\t\tfor ( const key in attributes ) {\n\n\t\t\tif ( geometry.attributes[ key ] === undefined ) continue;\n\n\t\t\tconst attribute1 = attributes[ key ];\n\t\t\tconst attributeArray1 = attribute1.array;\n\n\t\t\tconst attribute2 = geometry.attributes[ key ];\n\t\t\tconst attributeArray2 = attribute2.array;\n\n\t\t\tconst attributeOffset = attribute2.itemSize * offset;\n\t\t\tconst length = Math.min( attributeArray2.length, attributeArray1.length - attributeOffset );\n\n\t\t\tfor ( let i = 0, j = attributeOffset; i < length; i ++, j ++ ) {\n\n\t\t\t\tattributeArray1[ j ] = attributeArray2[ i ];\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tnormalizeNormals: function () {\n\n\t\tconst normals = this.attributes.normal;\n\n\t\tfor ( let i = 0, il = normals.count; i < il; i ++ ) {\n\n\t\t\t_vector$4.fromBufferAttribute( normals, i );\n\n\t\t\t_vector$4.normalize();\n\n\t\t\tnormals.setXYZ( i, _vector$4.x, _vector$4.y, _vector$4.z );\n\n\t\t}\n\n\t},\n\n\ttoNonIndexed: function () {\n\n\t\tfunction convertBufferAttribute( attribute, indices ) {\n\n\t\t\tconst array = attribute.array;\n\t\t\tconst itemSize = attribute.itemSize;\n\t\t\tconst normalized = attribute.normalized;\n\n\t\t\tconst array2 = new array.constructor( indices.length * itemSize );\n\n\t\t\tlet index = 0, index2 = 0;\n\n\t\t\tfor ( let i = 0, l = indices.length; i < l; i ++ ) {\n\n\t\t\t\tindex = indices[ i ] * itemSize;\n\n\t\t\t\tfor ( let j = 0; j < itemSize; j ++ ) {\n\n\t\t\t\t\tarray2[ index2 ++ ] = array[ index ++ ];\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\treturn new BufferAttribute( array2, itemSize, normalized );\n\n\t\t}\n\n\t\t//\n\n\t\tif ( this.index === null ) {\n\n\t\t\tconsole.warn( 'THREE.BufferGeometry.toNonIndexed(): BufferGeometry is already non-indexed.' );\n\t\t\treturn this;\n\n\t\t}\n\n\t\tconst geometry2 = new BufferGeometry();\n\n\t\tconst indices = this.index.array;\n\t\tconst attributes = this.attributes;\n\n\t\t// attributes\n\n\t\tfor ( const name in attributes ) {\n\n\t\t\tconst attribute = attributes[ name ];\n\n\t\t\tconst newAttribute = convertBufferAttribute( attribute, indices );\n\n\t\t\tgeometry2.setAttribute( name, newAttribute );\n\n\t\t}\n\n\t\t// morph attributes\n\n\t\tconst morphAttributes = this.morphAttributes;\n\n\t\tfor ( const name in morphAttributes ) {\n\n\t\t\tconst morphArray = [];\n\t\t\tconst morphAttribute = morphAttributes[ name ]; // morphAttribute: array of Float32BufferAttributes\n\n\t\t\tfor ( let i = 0, il = morphAttribute.length; i < il; i ++ ) {\n\n\t\t\t\tconst attribute = morphAttribute[ i ];\n\n\t\t\t\tconst newAttribute = convertBufferAttribute( attribute, indices );\n\n\t\t\t\tmorphArray.push( newAttribute );\n\n\t\t\t}\n\n\t\t\tgeometry2.morphAttributes[ name ] = morphArray;\n\n\t\t}\n\n\t\tgeometry2.morphTargetsRelative = this.morphTargetsRelative;\n\n\t\t// groups\n\n\t\tconst groups = this.groups;\n\n\t\tfor ( let i = 0, l = groups.length; i < l; i ++ ) {\n\n\t\t\tconst group = groups[ i ];\n\t\t\tgeometry2.addGroup( group.start, group.count, group.materialIndex );\n\n\t\t}\n\n\t\treturn geometry2;\n\n\t},\n\n\ttoJSON: function () {\n\n\t\tconst data = {\n\t\t\tmetadata: {\n\t\t\t\tversion: 4.5,\n\t\t\t\ttype: 'BufferGeometry',\n\t\t\t\tgenerator: 'BufferGeometry.toJSON'\n\t\t\t}\n\t\t};\n\n\t\t// standard BufferGeometry serialization\n\n\t\tdata.uuid = this.uuid;\n\t\tdata.type = this.type;\n\t\tif ( this.name !== '' ) data.name = this.name;\n\t\tif ( Object.keys( this.userData ).length > 0 ) data.userData = this.userData;\n\n\t\tif ( this.parameters !== undefined ) {\n\n\t\t\tconst parameters = this.parameters;\n\n\t\t\tfor ( const key in parameters ) {\n\n\t\t\t\tif ( parameters[ key ] !== undefined ) data[ key ] = parameters[ key ];\n\n\t\t\t}\n\n\t\t\treturn data;\n\n\t\t}\n\n\t\tdata.data = { attributes: {} };\n\n\t\tconst index = this.index;\n\n\t\tif ( index !== null ) {\n\n\t\t\tdata.data.index = {\n\t\t\t\ttype: index.array.constructor.name,\n\t\t\t\tarray: Array.prototype.slice.call( index.array )\n\t\t\t};\n\n\t\t}\n\n\t\tconst attributes = this.attributes;\n\n\t\tfor ( const key in attributes ) {\n\n\t\t\tconst attribute = attributes[ key ];\n\n\t\t\tconst attributeData = attribute.toJSON( data.data );\n\n\t\t\tif ( attribute.name !== '' ) attributeData.name = attribute.name;\n\n\t\t\tdata.data.attributes[ key ] = attributeData;\n\n\t\t}\n\n\t\tconst morphAttributes = {};\n\t\tlet hasMorphAttributes = false;\n\n\t\tfor ( const key in this.morphAttributes ) {\n\n\t\t\tconst attributeArray = this.morphAttributes[ key ];\n\n\t\t\tconst array = [];\n\n\t\t\tfor ( let i = 0, il = attributeArray.length; i < il; i ++ ) {\n\n\t\t\t\tconst attribute = attributeArray[ i ];\n\n\t\t\t\tconst attributeData = attribute.toJSON( data.data );\n\n\t\t\t\tif ( attribute.name !== '' ) attributeData.name = attribute.name;\n\n\t\t\t\tarray.push( attributeData );\n\n\t\t\t}\n\n\t\t\tif ( array.length > 0 ) {\n\n\t\t\t\tmorphAttributes[ key ] = array;\n\n\t\t\t\thasMorphAttributes = true;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( hasMorphAttributes ) {\n\n\t\t\tdata.data.morphAttributes = morphAttributes;\n\t\t\tdata.data.morphTargetsRelative = this.morphTargetsRelative;\n\n\t\t}\n\n\t\tconst groups = this.groups;\n\n\t\tif ( groups.length > 0 ) {\n\n\t\t\tdata.data.groups = JSON.parse( JSON.stringify( groups ) );\n\n\t\t}\n\n\t\tconst boundingSphere = this.boundingSphere;\n\n\t\tif ( boundingSphere !== null ) {\n\n\t\t\tdata.data.boundingSphere = {\n\t\t\t\tcenter: boundingSphere.center.toArray(),\n\t\t\t\tradius: boundingSphere.radius\n\t\t\t};\n\n\t\t}\n\n\t\treturn data;\n\n\t},\n\n\tclone: function () {\n\n\t\t/*\n\t\t // Handle primitives\n\n\t\t const parameters = this.parameters;\n\n\t\t if ( parameters !== undefined ) {\n\n\t\t const values = [];\n\n\t\t for ( const key in parameters ) {\n\n\t\t values.push( parameters[ key ] );\n\n\t\t }\n\n\t\t const geometry = Object.create( this.constructor.prototype );\n\t\t this.constructor.apply( geometry, values );\n\t\t return geometry;\n\n\t\t }\n\n\t\t return new this.constructor().copy( this );\n\t\t */\n\n\t\treturn new BufferGeometry().copy( this );\n\n\t},\n\n\tcopy: function ( source ) {\n\n\t\t// reset\n\n\t\tthis.index = null;\n\t\tthis.attributes = {};\n\t\tthis.morphAttributes = {};\n\t\tthis.groups = [];\n\t\tthis.boundingBox = null;\n\t\tthis.boundingSphere = null;\n\n\t\t// used for storing cloned, shared data\n\n\t\tconst data = {};\n\n\t\t// name\n\n\t\tthis.name = source.name;\n\n\t\t// index\n\n\t\tconst index = source.index;\n\n\t\tif ( index !== null ) {\n\n\t\t\tthis.setIndex( index.clone( data ) );\n\n\t\t}\n\n\t\t// attributes\n\n\t\tconst attributes = source.attributes;\n\n\t\tfor ( const name in attributes ) {\n\n\t\t\tconst attribute = attributes[ name ];\n\t\t\tthis.setAttribute( name, attribute.clone( data ) );\n\n\t\t}\n\n\t\t// morph attributes\n\n\t\tconst morphAttributes = source.morphAttributes;\n\n\t\tfor ( const name in morphAttributes ) {\n\n\t\t\tconst array = [];\n\t\t\tconst morphAttribute = morphAttributes[ name ]; // morphAttribute: array of Float32BufferAttributes\n\n\t\t\tfor ( let i = 0, l = morphAttribute.length; i < l; i ++ ) {\n\n\t\t\t\tarray.push( morphAttribute[ i ].clone( data ) );\n\n\t\t\t}\n\n\t\t\tthis.morphAttributes[ name ] = array;\n\n\t\t}\n\n\t\tthis.morphTargetsRelative = source.morphTargetsRelative;\n\n\t\t// groups\n\n\t\tconst groups = source.groups;\n\n\t\tfor ( let i = 0, l = groups.length; i < l; i ++ ) {\n\n\t\t\tconst group = groups[ i ];\n\t\t\tthis.addGroup( group.start, group.count, group.materialIndex );\n\n\t\t}\n\n\t\t// bounding box\n\n\t\tconst boundingBox = source.boundingBox;\n\n\t\tif ( boundingBox !== null ) {\n\n\t\t\tthis.boundingBox = boundingBox.clone();\n\n\t\t}\n\n\t\t// bounding sphere\n\n\t\tconst boundingSphere = source.boundingSphere;\n\n\t\tif ( boundingSphere !== null ) {\n\n\t\t\tthis.boundingSphere = boundingSphere.clone();\n\n\t\t}\n\n\t\t// draw range\n\n\t\tthis.drawRange.start = source.drawRange.start;\n\t\tthis.drawRange.count = source.drawRange.count;\n\n\t\t// user data\n\n\t\tthis.userData = source.userData;\n\n\t\treturn this;\n\n\t},\n\n\tdispose: function () {\n\n\t\tthis.dispatchEvent( { type: 'dispose' } );\n\n\t}\n\n} );\n\nconst _inverseMatrix = new Matrix4();\nconst _ray = new Ray();\nconst _sphere = new Sphere();\n\nconst _vA = new Vector3();\nconst _vB = new Vector3();\nconst _vC = new Vector3();\n\nconst _tempA = new Vector3();\nconst _tempB = new Vector3();\nconst _tempC = new Vector3();\n\nconst _morphA = new Vector3();\nconst _morphB = new Vector3();\nconst _morphC = new Vector3();\n\nconst _uvA = new Vector2();\nconst _uvB = new Vector2();\nconst _uvC = new Vector2();\n\nconst _intersectionPoint = new Vector3();\nconst _intersectionPointWorld = new Vector3();\n\nfunction Mesh( geometry = new BufferGeometry(), material = new MeshBasicMaterial() ) {\n\n\tObject3D.call( this );\n\n\tthis.type = 'Mesh';\n\n\tthis.geometry = geometry;\n\tthis.material = material;\n\n\tthis.updateMorphTargets();\n\n}\n\nMesh.prototype = Object.assign( Object.create( Object3D.prototype ), {\n\n\tconstructor: Mesh,\n\n\tisMesh: true,\n\n\tcopy: function ( source ) {\n\n\t\tObject3D.prototype.copy.call( this, source );\n\n\t\tif ( source.morphTargetInfluences !== undefined ) {\n\n\t\t\tthis.morphTargetInfluences = source.morphTargetInfluences.slice();\n\n\t\t}\n\n\t\tif ( source.morphTargetDictionary !== undefined ) {\n\n\t\t\tthis.morphTargetDictionary = Object.assign( {}, source.morphTargetDictionary );\n\n\t\t}\n\n\t\tthis.material = source.material;\n\t\tthis.geometry = source.geometry;\n\n\t\treturn this;\n\n\t},\n\n\tupdateMorphTargets: function () {\n\n\t\tconst geometry = this.geometry;\n\n\t\tif ( geometry.isBufferGeometry ) {\n\n\t\t\tconst morphAttributes = geometry.morphAttributes;\n\t\t\tconst keys = Object.keys( morphAttributes );\n\n\t\t\tif ( keys.length > 0 ) {\n\n\t\t\t\tconst morphAttribute = morphAttributes[ keys[ 0 ] ];\n\n\t\t\t\tif ( morphAttribute !== undefined ) {\n\n\t\t\t\t\tthis.morphTargetInfluences = [];\n\t\t\t\t\tthis.morphTargetDictionary = {};\n\n\t\t\t\t\tfor ( let m = 0, ml = morphAttribute.length; m < ml; m ++ ) {\n\n\t\t\t\t\t\tconst name = morphAttribute[ m ].name || String( m );\n\n\t\t\t\t\t\tthis.morphTargetInfluences.push( 0 );\n\t\t\t\t\t\tthis.morphTargetDictionary[ name ] = m;\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\tconst morphTargets = geometry.morphTargets;\n\n\t\t\tif ( morphTargets !== undefined && morphTargets.length > 0 ) {\n\n\t\t\t\tconsole.error( 'THREE.Mesh.updateMorphTargets() no longer supports THREE.Geometry. Use THREE.BufferGeometry instead.' );\n\n\t\t\t}\n\n\t\t}\n\n\t},\n\n\traycast: function ( raycaster, intersects ) {\n\n\t\tconst geometry = this.geometry;\n\t\tconst material = this.material;\n\t\tconst matrixWorld = this.matrixWorld;\n\n\t\tif ( material === undefined ) return;\n\n\t\t// Checking boundingSphere distance to ray\n\n\t\tif ( geometry.boundingSphere === null ) geometry.computeBoundingSphere();\n\n\t\t_sphere.copy( geometry.boundingSphere );\n\t\t_sphere.applyMatrix4( matrixWorld );\n\n\t\tif ( raycaster.ray.intersectsSphere( _sphere ) === false ) return;\n\n\t\t//\n\n\t\t_inverseMatrix.copy( matrixWorld ).invert();\n\t\t_ray.copy( raycaster.ray ).applyMatrix4( _inverseMatrix );\n\n\t\t// Check boundingBox before continuing\n\n\t\tif ( geometry.boundingBox !== null ) {\n\n\t\t\tif ( _ray.intersectsBox( geometry.boundingBox ) === false ) return;\n\n\t\t}\n\n\t\tlet intersection;\n\n\t\tif ( geometry.isBufferGeometry ) {\n\n\t\t\tconst index = geometry.index;\n\t\t\tconst position = geometry.attributes.position;\n\t\t\tconst morphPosition = geometry.morphAttributes.position;\n\t\t\tconst morphTargetsRelative = geometry.morphTargetsRelative;\n\t\t\tconst uv = geometry.attributes.uv;\n\t\t\tconst uv2 = geometry.attributes.uv2;\n\t\t\tconst groups = geometry.groups;\n\t\t\tconst drawRange = geometry.drawRange;\n\n\t\t\tif ( index !== null ) {\n\n\t\t\t\t// indexed buffer geometry\n\n\t\t\t\tif ( Array.isArray( material ) ) {\n\n\t\t\t\t\tfor ( let i = 0, il = groups.length; i < il; i ++ ) {\n\n\t\t\t\t\t\tconst group = groups[ i ];\n\t\t\t\t\t\tconst groupMaterial = material[ group.materialIndex ];\n\n\t\t\t\t\t\tconst start = Math.max( group.start, drawRange.start );\n\t\t\t\t\t\tconst end = Math.min( ( group.start + group.count ), ( drawRange.start + drawRange.count ) );\n\n\t\t\t\t\t\tfor ( let j = start, jl = end; j < jl; j += 3 ) {\n\n\t\t\t\t\t\t\tconst a = index.getX( j );\n\t\t\t\t\t\t\tconst b = index.getX( j + 1 );\n\t\t\t\t\t\t\tconst c = index.getX( j + 2 );\n\n\t\t\t\t\t\t\tintersection = checkBufferGeometryIntersection( this, groupMaterial, raycaster, _ray, position, morphPosition, morphTargetsRelative, uv, uv2, a, b, c );\n\n\t\t\t\t\t\t\tif ( intersection ) {\n\n\t\t\t\t\t\t\t\tintersection.faceIndex = Math.floor( j / 3 ); // triangle number in indexed buffer semantics\n\t\t\t\t\t\t\t\tintersection.face.materialIndex = group.materialIndex;\n\t\t\t\t\t\t\t\tintersects.push( intersection );\n\n\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t} else {\n\n\t\t\t\t\tconst start = Math.max( 0, drawRange.start );\n\t\t\t\t\tconst end = Math.min( index.count, ( drawRange.start + drawRange.count ) );\n\n\t\t\t\t\tfor ( let i = start, il = end; i < il; i += 3 ) {\n\n\t\t\t\t\t\tconst a = index.getX( i );\n\t\t\t\t\t\tconst b = index.getX( i + 1 );\n\t\t\t\t\t\tconst c = index.getX( i + 2 );\n\n\t\t\t\t\t\tintersection = checkBufferGeometryIntersection( this, material, raycaster, _ray, position, morphPosition, morphTargetsRelative, uv, uv2, a, b, c );\n\n\t\t\t\t\t\tif ( intersection ) {\n\n\t\t\t\t\t\t\tintersection.faceIndex = Math.floor( i / 3 ); // triangle number in indexed buffer semantics\n\t\t\t\t\t\t\tintersects.push( intersection );\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t} else if ( position !== undefined ) {\n\n\t\t\t\t// non-indexed buffer geometry\n\n\t\t\t\tif ( Array.isArray( material ) ) {\n\n\t\t\t\t\tfor ( let i = 0, il = groups.length; i < il; i ++ ) {\n\n\t\t\t\t\t\tconst group = groups[ i ];\n\t\t\t\t\t\tconst groupMaterial = material[ group.materialIndex ];\n\n\t\t\t\t\t\tconst start = Math.max( group.start, drawRange.start );\n\t\t\t\t\t\tconst end = Math.min( ( group.start + group.count ), ( drawRange.start + drawRange.count ) );\n\n\t\t\t\t\t\tfor ( let j = start, jl = end; j < jl; j += 3 ) {\n\n\t\t\t\t\t\t\tconst a = j;\n\t\t\t\t\t\t\tconst b = j + 1;\n\t\t\t\t\t\t\tconst c = j + 2;\n\n\t\t\t\t\t\t\tintersection = checkBufferGeometryIntersection( this, groupMaterial, raycaster, _ray, position, morphPosition, morphTargetsRelative, uv, uv2, a, b, c );\n\n\t\t\t\t\t\t\tif ( intersection ) {\n\n\t\t\t\t\t\t\t\tintersection.faceIndex = Math.floor( j / 3 ); // triangle number in non-indexed buffer semantics\n\t\t\t\t\t\t\t\tintersection.face.materialIndex = group.materialIndex;\n\t\t\t\t\t\t\t\tintersects.push( intersection );\n\n\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t} else {\n\n\t\t\t\t\tconst start = Math.max( 0, drawRange.start );\n\t\t\t\t\tconst end = Math.min( position.count, ( drawRange.start + drawRange.count ) );\n\n\t\t\t\t\tfor ( let i = start, il = end; i < il; i += 3 ) {\n\n\t\t\t\t\t\tconst a = i;\n\t\t\t\t\t\tconst b = i + 1;\n\t\t\t\t\t\tconst c = i + 2;\n\n\t\t\t\t\t\tintersection = checkBufferGeometryIntersection( this, material, raycaster, _ray, position, morphPosition, morphTargetsRelative, uv, uv2, a, b, c );\n\n\t\t\t\t\t\tif ( intersection ) {\n\n\t\t\t\t\t\t\tintersection.faceIndex = Math.floor( i / 3 ); // triangle number in non-indexed buffer semantics\n\t\t\t\t\t\t\tintersects.push( intersection );\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t} else if ( geometry.isGeometry ) {\n\n\t\t\tconsole.error( 'THREE.Mesh.raycast() no longer supports THREE.Geometry. Use THREE.BufferGeometry instead.' );\n\n\t\t}\n\n\t}\n\n} );\n\nfunction checkIntersection( object, material, raycaster, ray, pA, pB, pC, point ) {\n\n\tlet intersect;\n\n\tif ( material.side === BackSide ) {\n\n\t\tintersect = ray.intersectTriangle( pC, pB, pA, true, point );\n\n\t} else {\n\n\t\tintersect = ray.intersectTriangle( pA, pB, pC, material.side !== DoubleSide, point );\n\n\t}\n\n\tif ( intersect === null ) return null;\n\n\t_intersectionPointWorld.copy( point );\n\t_intersectionPointWorld.applyMatrix4( object.matrixWorld );\n\n\tconst distance = raycaster.ray.origin.distanceTo( _intersectionPointWorld );\n\n\tif ( distance < raycaster.near || distance > raycaster.far ) return null;\n\n\treturn {\n\t\tdistance: distance,\n\t\tpoint: _intersectionPointWorld.clone(),\n\t\tobject: object\n\t};\n\n}\n\nfunction checkBufferGeometryIntersection( object, material, raycaster, ray, position, morphPosition, morphTargetsRelative, uv, uv2, a, b, c ) {\n\n\t_vA.fromBufferAttribute( position, a );\n\t_vB.fromBufferAttribute( position, b );\n\t_vC.fromBufferAttribute( position, c );\n\n\tconst morphInfluences = object.morphTargetInfluences;\n\n\tif ( material.morphTargets && morphPosition && morphInfluences ) {\n\n\t\t_morphA.set( 0, 0, 0 );\n\t\t_morphB.set( 0, 0, 0 );\n\t\t_morphC.set( 0, 0, 0 );\n\n\t\tfor ( let i = 0, il = morphPosition.length; i < il; i ++ ) {\n\n\t\t\tconst influence = morphInfluences[ i ];\n\t\t\tconst morphAttribute = morphPosition[ i ];\n\n\t\t\tif ( influence === 0 ) continue;\n\n\t\t\t_tempA.fromBufferAttribute( morphAttribute, a );\n\t\t\t_tempB.fromBufferAttribute( morphAttribute, b );\n\t\t\t_tempC.fromBufferAttribute( morphAttribute, c );\n\n\t\t\tif ( morphTargetsRelative ) {\n\n\t\t\t\t_morphA.addScaledVector( _tempA, influence );\n\t\t\t\t_morphB.addScaledVector( _tempB, influence );\n\t\t\t\t_morphC.addScaledVector( _tempC, influence );\n\n\t\t\t} else {\n\n\t\t\t\t_morphA.addScaledVector( _tempA.sub( _vA ), influence );\n\t\t\t\t_morphB.addScaledVector( _tempB.sub( _vB ), influence );\n\t\t\t\t_morphC.addScaledVector( _tempC.sub( _vC ), influence );\n\n\t\t\t}\n\n\t\t}\n\n\t\t_vA.add( _morphA );\n\t\t_vB.add( _morphB );\n\t\t_vC.add( _morphC );\n\n\t}\n\n\tif ( object.isSkinnedMesh ) {\n\n\t\tobject.boneTransform( a, _vA );\n\t\tobject.boneTransform( b, _vB );\n\t\tobject.boneTransform( c, _vC );\n\n\t}\n\n\tconst intersection = checkIntersection( object, material, raycaster, ray, _vA, _vB, _vC, _intersectionPoint );\n\n\tif ( intersection ) {\n\n\t\tif ( uv ) {\n\n\t\t\t_uvA.fromBufferAttribute( uv, a );\n\t\t\t_uvB.fromBufferAttribute( uv, b );\n\t\t\t_uvC.fromBufferAttribute( uv, c );\n\n\t\t\tintersection.uv = Triangle.getUV( _intersectionPoint, _vA, _vB, _vC, _uvA, _uvB, _uvC, new Vector2() );\n\n\t\t}\n\n\t\tif ( uv2 ) {\n\n\t\t\t_uvA.fromBufferAttribute( uv2, a );\n\t\t\t_uvB.fromBufferAttribute( uv2, b );\n\t\t\t_uvC.fromBufferAttribute( uv2, c );\n\n\t\t\tintersection.uv2 = Triangle.getUV( _intersectionPoint, _vA, _vB, _vC, _uvA, _uvB, _uvC, new Vector2() );\n\n\t\t}\n\n\t\tconst face = new Face3( a, b, c );\n\t\tTriangle.getNormal( _vA, _vB, _vC, face.normal );\n\n\t\tintersection.face = face;\n\n\t}\n\n\treturn intersection;\n\n}\n\nclass BoxGeometry extends BufferGeometry {\n\n\tconstructor( width = 1, height = 1, depth = 1, widthSegments = 1, heightSegments = 1, depthSegments = 1 ) {\n\n\t\tsuper();\n\n\t\tthis.type = 'BoxGeometry';\n\n\t\tthis.parameters = {\n\t\t\twidth: width,\n\t\t\theight: height,\n\t\t\tdepth: depth,\n\t\t\twidthSegments: widthSegments,\n\t\t\theightSegments: heightSegments,\n\t\t\tdepthSegments: depthSegments\n\t\t};\n\n\t\tconst scope = this;\n\n\t\t// segments\n\n\t\twidthSegments = Math.floor( widthSegments );\n\t\theightSegments = Math.floor( heightSegments );\n\t\tdepthSegments = Math.floor( depthSegments );\n\n\t\t// buffers\n\n\t\tconst indices = [];\n\t\tconst vertices = [];\n\t\tconst normals = [];\n\t\tconst uvs = [];\n\n\t\t// helper variables\n\n\t\tlet numberOfVertices = 0;\n\t\tlet groupStart = 0;\n\n\t\t// build each side of the box geometry\n\n\t\tbuildPlane( 'z', 'y', 'x', - 1, - 1, depth, height, width, depthSegments, heightSegments, 0 ); // px\n\t\tbuildPlane( 'z', 'y', 'x', 1, - 1, depth, height, - width, depthSegments, heightSegments, 1 ); // nx\n\t\tbuildPlane( 'x', 'z', 'y', 1, 1, width, depth, height, widthSegments, depthSegments, 2 ); // py\n\t\tbuildPlane( 'x', 'z', 'y', 1, - 1, width, depth, - height, widthSegments, depthSegments, 3 ); // ny\n\t\tbuildPlane( 'x', 'y', 'z', 1, - 1, width, height, depth, widthSegments, heightSegments, 4 ); // pz\n\t\tbuildPlane( 'x', 'y', 'z', - 1, - 1, width, height, - depth, widthSegments, heightSegments, 5 ); // nz\n\n\t\t// build geometry\n\n\t\tthis.setIndex( indices );\n\t\tthis.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\t\tthis.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );\n\t\tthis.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );\n\n\t\tfunction buildPlane( u, v, w, udir, vdir, width, height, depth, gridX, gridY, materialIndex ) {\n\n\t\t\tconst segmentWidth = width / gridX;\n\t\t\tconst segmentHeight = height / gridY;\n\n\t\t\tconst widthHalf = width / 2;\n\t\t\tconst heightHalf = height / 2;\n\t\t\tconst depthHalf = depth / 2;\n\n\t\t\tconst gridX1 = gridX + 1;\n\t\t\tconst gridY1 = gridY + 1;\n\n\t\t\tlet vertexCounter = 0;\n\t\t\tlet groupCount = 0;\n\n\t\t\tconst vector = new Vector3();\n\n\t\t\t// generate vertices, normals and uvs\n\n\t\t\tfor ( let iy = 0; iy < gridY1; iy ++ ) {\n\n\t\t\t\tconst y = iy * segmentHeight - heightHalf;\n\n\t\t\t\tfor ( let ix = 0; ix < gridX1; ix ++ ) {\n\n\t\t\t\t\tconst x = ix * segmentWidth - widthHalf;\n\n\t\t\t\t\t// set values to correct vector component\n\n\t\t\t\t\tvector[ u ] = x * udir;\n\t\t\t\t\tvector[ v ] = y * vdir;\n\t\t\t\t\tvector[ w ] = depthHalf;\n\n\t\t\t\t\t// now apply vector to vertex buffer\n\n\t\t\t\t\tvertices.push( vector.x, vector.y, vector.z );\n\n\t\t\t\t\t// set values to correct vector component\n\n\t\t\t\t\tvector[ u ] = 0;\n\t\t\t\t\tvector[ v ] = 0;\n\t\t\t\t\tvector[ w ] = depth > 0 ? 1 : - 1;\n\n\t\t\t\t\t// now apply vector to normal buffer\n\n\t\t\t\t\tnormals.push( vector.x, vector.y, vector.z );\n\n\t\t\t\t\t// uvs\n\n\t\t\t\t\tuvs.push( ix / gridX );\n\t\t\t\t\tuvs.push( 1 - ( iy / gridY ) );\n\n\t\t\t\t\t// counters\n\n\t\t\t\t\tvertexCounter += 1;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\t// indices\n\n\t\t\t// 1. you need three indices to draw a single face\n\t\t\t// 2. a single segment consists of two faces\n\t\t\t// 3. so we need to generate six (2*3) indices per segment\n\n\t\t\tfor ( let iy = 0; iy < gridY; iy ++ ) {\n\n\t\t\t\tfor ( let ix = 0; ix < gridX; ix ++ ) {\n\n\t\t\t\t\tconst a = numberOfVertices + ix + gridX1 * iy;\n\t\t\t\t\tconst b = numberOfVertices + ix + gridX1 * ( iy + 1 );\n\t\t\t\t\tconst c = numberOfVertices + ( ix + 1 ) + gridX1 * ( iy + 1 );\n\t\t\t\t\tconst d = numberOfVertices + ( ix + 1 ) + gridX1 * iy;\n\n\t\t\t\t\t// faces\n\n\t\t\t\t\tindices.push( a, b, d );\n\t\t\t\t\tindices.push( b, c, d );\n\n\t\t\t\t\t// increase counter\n\n\t\t\t\t\tgroupCount += 6;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\t// add a group to the geometry. this will ensure multi material support\n\n\t\t\tscope.addGroup( groupStart, groupCount, materialIndex );\n\n\t\t\t// calculate new start value for groups\n\n\t\t\tgroupStart += groupCount;\n\n\t\t\t// update total number of vertices\n\n\t\t\tnumberOfVertices += vertexCounter;\n\n\t\t}\n\n\t}\n\n}\n\n/**\n * Uniform Utilities\n */\n\nfunction cloneUniforms( src ) {\n\n\tconst dst = {};\n\n\tfor ( const u in src ) {\n\n\t\tdst[ u ] = {};\n\n\t\tfor ( const p in src[ u ] ) {\n\n\t\t\tconst property = src[ u ][ p ];\n\n\t\t\tif ( property && ( property.isColor ||\n\t\t\t\tproperty.isMatrix3 || property.isMatrix4 ||\n\t\t\t\tproperty.isVector2 || property.isVector3 || property.isVector4 ||\n\t\t\t\tproperty.isTexture ) ) {\n\n\t\t\t\tdst[ u ][ p ] = property.clone();\n\n\t\t\t} else if ( Array.isArray( property ) ) {\n\n\t\t\t\tdst[ u ][ p ] = property.slice();\n\n\t\t\t} else {\n\n\t\t\t\tdst[ u ][ p ] = property;\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\treturn dst;\n\n}\n\nfunction mergeUniforms( uniforms ) {\n\n\tconst merged = {};\n\n\tfor ( let u = 0; u < uniforms.length; u ++ ) {\n\n\t\tconst tmp = cloneUniforms( uniforms[ u ] );\n\n\t\tfor ( const p in tmp ) {\n\n\t\t\tmerged[ p ] = tmp[ p ];\n\n\t\t}\n\n\t}\n\n\treturn merged;\n\n}\n\n// Legacy\n\nconst UniformsUtils = { clone: cloneUniforms, merge: mergeUniforms };\n\nvar default_vertex = \"void main() {\\n\\tgl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );\\n}\";\n\nvar default_fragment = \"void main() {\\n\\tgl_FragColor = vec4( 1.0, 0.0, 0.0, 1.0 );\\n}\";\n\n/**\n * parameters = {\n *  defines: { \"label\" : \"value\" },\n *  uniforms: { \"parameter1\": { value: 1.0 }, \"parameter2\": { value2: 2 } },\n *\n *  fragmentShader: <string>,\n *  vertexShader: <string>,\n *\n *  wireframe: <boolean>,\n *  wireframeLinewidth: <float>,\n *\n *  lights: <bool>,\n *\n *  skinning: <bool>,\n *  morphTargets: <bool>,\n *  morphNormals: <bool>\n * }\n */\n\nfunction ShaderMaterial( parameters ) {\n\n\tMaterial.call( this );\n\n\tthis.type = 'ShaderMaterial';\n\n\tthis.defines = {};\n\tthis.uniforms = {};\n\n\tthis.vertexShader = default_vertex;\n\tthis.fragmentShader = default_fragment;\n\n\tthis.linewidth = 1;\n\n\tthis.wireframe = false;\n\tthis.wireframeLinewidth = 1;\n\n\tthis.fog = false; // set to use scene fog\n\tthis.lights = false; // set to use scene lights\n\tthis.clipping = false; // set to use user-defined clipping planes\n\n\tthis.skinning = false; // set to use skinning attribute streams\n\tthis.morphTargets = false; // set to use morph targets\n\tthis.morphNormals = false; // set to use morph normals\n\n\tthis.extensions = {\n\t\tderivatives: false, // set to use derivatives\n\t\tfragDepth: false, // set to use fragment depth values\n\t\tdrawBuffers: false, // set to use draw buffers\n\t\tshaderTextureLOD: false // set to use shader texture LOD\n\t};\n\n\t// When rendered geometry doesn't include these attributes but the material does,\n\t// use these default values in WebGL. This avoids errors when buffer data is missing.\n\tthis.defaultAttributeValues = {\n\t\t'color': [ 1, 1, 1 ],\n\t\t'uv': [ 0, 0 ],\n\t\t'uv2': [ 0, 0 ]\n\t};\n\n\tthis.index0AttributeName = undefined;\n\tthis.uniformsNeedUpdate = false;\n\n\tthis.glslVersion = null;\n\n\tif ( parameters !== undefined ) {\n\n\t\tif ( parameters.attributes !== undefined ) {\n\n\t\t\tconsole.error( 'THREE.ShaderMaterial: attributes should now be defined in THREE.BufferGeometry instead.' );\n\n\t\t}\n\n\t\tthis.setValues( parameters );\n\n\t}\n\n}\n\nShaderMaterial.prototype = Object.create( Material.prototype );\nShaderMaterial.prototype.constructor = ShaderMaterial;\n\nShaderMaterial.prototype.isShaderMaterial = true;\n\nShaderMaterial.prototype.copy = function ( source ) {\n\n\tMaterial.prototype.copy.call( this, source );\n\n\tthis.fragmentShader = source.fragmentShader;\n\tthis.vertexShader = source.vertexShader;\n\n\tthis.uniforms = cloneUniforms( source.uniforms );\n\n\tthis.defines = Object.assign( {}, source.defines );\n\n\tthis.wireframe = source.wireframe;\n\tthis.wireframeLinewidth = source.wireframeLinewidth;\n\n\tthis.lights = source.lights;\n\tthis.clipping = source.clipping;\n\n\tthis.skinning = source.skinning;\n\n\tthis.morphTargets = source.morphTargets;\n\tthis.morphNormals = source.morphNormals;\n\n\tthis.extensions = Object.assign( {}, source.extensions );\n\n\tthis.glslVersion = source.glslVersion;\n\n\treturn this;\n\n};\n\nShaderMaterial.prototype.toJSON = function ( meta ) {\n\n\tconst data = Material.prototype.toJSON.call( this, meta );\n\n\tdata.glslVersion = this.glslVersion;\n\tdata.uniforms = {};\n\n\tfor ( const name in this.uniforms ) {\n\n\t\tconst uniform = this.uniforms[ name ];\n\t\tconst value = uniform.value;\n\n\t\tif ( value && value.isTexture ) {\n\n\t\t\tdata.uniforms[ name ] = {\n\t\t\t\ttype: 't',\n\t\t\t\tvalue: value.toJSON( meta ).uuid\n\t\t\t};\n\n\t\t} else if ( value && value.isColor ) {\n\n\t\t\tdata.uniforms[ name ] = {\n\t\t\t\ttype: 'c',\n\t\t\t\tvalue: value.getHex()\n\t\t\t};\n\n\t\t} else if ( value && value.isVector2 ) {\n\n\t\t\tdata.uniforms[ name ] = {\n\t\t\t\ttype: 'v2',\n\t\t\t\tvalue: value.toArray()\n\t\t\t};\n\n\t\t} else if ( value && value.isVector3 ) {\n\n\t\t\tdata.uniforms[ name ] = {\n\t\t\t\ttype: 'v3',\n\t\t\t\tvalue: value.toArray()\n\t\t\t};\n\n\t\t} else if ( value && value.isVector4 ) {\n\n\t\t\tdata.uniforms[ name ] = {\n\t\t\t\ttype: 'v4',\n\t\t\t\tvalue: value.toArray()\n\t\t\t};\n\n\t\t} else if ( value && value.isMatrix3 ) {\n\n\t\t\tdata.uniforms[ name ] = {\n\t\t\t\ttype: 'm3',\n\t\t\t\tvalue: value.toArray()\n\t\t\t};\n\n\t\t} else if ( value && value.isMatrix4 ) {\n\n\t\t\tdata.uniforms[ name ] = {\n\t\t\t\ttype: 'm4',\n\t\t\t\tvalue: value.toArray()\n\t\t\t};\n\n\t\t} else {\n\n\t\t\tdata.uniforms[ name ] = {\n\t\t\t\tvalue: value\n\t\t\t};\n\n\t\t\t// note: the array variants v2v, v3v, v4v, m4v and tv are not supported so far\n\n\t\t}\n\n\t}\n\n\tif ( Object.keys( this.defines ).length > 0 ) data.defines = this.defines;\n\n\tdata.vertexShader = this.vertexShader;\n\tdata.fragmentShader = this.fragmentShader;\n\n\tconst extensions = {};\n\n\tfor ( const key in this.extensions ) {\n\n\t\tif ( this.extensions[ key ] === true ) extensions[ key ] = true;\n\n\t}\n\n\tif ( Object.keys( extensions ).length > 0 ) data.extensions = extensions;\n\n\treturn data;\n\n};\n\nfunction Camera() {\n\n\tObject3D.call( this );\n\n\tthis.type = 'Camera';\n\n\tthis.matrixWorldInverse = new Matrix4();\n\n\tthis.projectionMatrix = new Matrix4();\n\tthis.projectionMatrixInverse = new Matrix4();\n\n}\n\nCamera.prototype = Object.assign( Object.create( Object3D.prototype ), {\n\n\tconstructor: Camera,\n\n\tisCamera: true,\n\n\tcopy: function ( source, recursive ) {\n\n\t\tObject3D.prototype.copy.call( this, source, recursive );\n\n\t\tthis.matrixWorldInverse.copy( source.matrixWorldInverse );\n\n\t\tthis.projectionMatrix.copy( source.projectionMatrix );\n\t\tthis.projectionMatrixInverse.copy( source.projectionMatrixInverse );\n\n\t\treturn this;\n\n\t},\n\n\tgetWorldDirection: function ( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Camera: .getWorldDirection() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\tthis.updateWorldMatrix( true, false );\n\n\t\tconst e = this.matrixWorld.elements;\n\n\t\treturn target.set( - e[ 8 ], - e[ 9 ], - e[ 10 ] ).normalize();\n\n\t},\n\n\tupdateMatrixWorld: function ( force ) {\n\n\t\tObject3D.prototype.updateMatrixWorld.call( this, force );\n\n\t\tthis.matrixWorldInverse.copy( this.matrixWorld ).invert();\n\n\t},\n\n\tupdateWorldMatrix: function ( updateParents, updateChildren ) {\n\n\t\tObject3D.prototype.updateWorldMatrix.call( this, updateParents, updateChildren );\n\n\t\tthis.matrixWorldInverse.copy( this.matrixWorld ).invert();\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor().copy( this );\n\n\t}\n\n} );\n\nfunction PerspectiveCamera( fov = 50, aspect = 1, near = 0.1, far = 2000 ) {\n\n\tCamera.call( this );\n\n\tthis.type = 'PerspectiveCamera';\n\n\tthis.fov = fov;\n\tthis.zoom = 1;\n\n\tthis.near = near;\n\tthis.far = far;\n\tthis.focus = 10;\n\n\tthis.aspect = aspect;\n\tthis.view = null;\n\n\tthis.filmGauge = 35;\t// width of the film (default in millimeters)\n\tthis.filmOffset = 0;\t// horizontal film offset (same unit as gauge)\n\n\tthis.updateProjectionMatrix();\n\n}\n\nPerspectiveCamera.prototype = Object.assign( Object.create( Camera.prototype ), {\n\n\tconstructor: PerspectiveCamera,\n\n\tisPerspectiveCamera: true,\n\n\tcopy: function ( source, recursive ) {\n\n\t\tCamera.prototype.copy.call( this, source, recursive );\n\n\t\tthis.fov = source.fov;\n\t\tthis.zoom = source.zoom;\n\n\t\tthis.near = source.near;\n\t\tthis.far = source.far;\n\t\tthis.focus = source.focus;\n\n\t\tthis.aspect = source.aspect;\n\t\tthis.view = source.view === null ? null : Object.assign( {}, source.view );\n\n\t\tthis.filmGauge = source.filmGauge;\n\t\tthis.filmOffset = source.filmOffset;\n\n\t\treturn this;\n\n\t},\n\n\t/**\n\t * Sets the FOV by focal length in respect to the current .filmGauge.\n\t *\n\t * The default film gauge is 35, so that the focal length can be specified for\n\t * a 35mm (full frame) camera.\n\t *\n\t * Values for focal length and film gauge must have the same unit.\n\t */\n\tsetFocalLength: function ( focalLength ) {\n\n\t\t/** see {@link http://www.bobatkins.com/photography/technical/field_of_view.html} */\n\t\tconst vExtentSlope = 0.5 * this.getFilmHeight() / focalLength;\n\n\t\tthis.fov = MathUtils.RAD2DEG * 2 * Math.atan( vExtentSlope );\n\t\tthis.updateProjectionMatrix();\n\n\t},\n\n\t/**\n\t * Calculates the focal length from the current .fov and .filmGauge.\n\t */\n\tgetFocalLength: function () {\n\n\t\tconst vExtentSlope = Math.tan( MathUtils.DEG2RAD * 0.5 * this.fov );\n\n\t\treturn 0.5 * this.getFilmHeight() / vExtentSlope;\n\n\t},\n\n\tgetEffectiveFOV: function () {\n\n\t\treturn MathUtils.RAD2DEG * 2 * Math.atan(\n\t\t\tMath.tan( MathUtils.DEG2RAD * 0.5 * this.fov ) / this.zoom );\n\n\t},\n\n\tgetFilmWidth: function () {\n\n\t\t// film not completely covered in portrait format (aspect < 1)\n\t\treturn this.filmGauge * Math.min( this.aspect, 1 );\n\n\t},\n\n\tgetFilmHeight: function () {\n\n\t\t// film not completely covered in landscape format (aspect > 1)\n\t\treturn this.filmGauge / Math.max( this.aspect, 1 );\n\n\t},\n\n\t/**\n\t * Sets an offset in a larger frustum. This is useful for multi-window or\n\t * multi-monitor/multi-machine setups.\n\t *\n\t * For example, if you have 3x2 monitors and each monitor is 1920x1080 and\n\t * the monitors are in grid like this\n\t *\n\t *   +---+---+---+\n\t *   | A | B | C |\n\t *   +---+---+---+\n\t *   | D | E | F |\n\t *   +---+---+---+\n\t *\n\t * then for each monitor you would call it like this\n\t *\n\t *   const w = 1920;\n\t *   const h = 1080;\n\t *   const fullWidth = w * 3;\n\t *   const fullHeight = h * 2;\n\t *\n\t *   --A--\n\t *   camera.setViewOffset( fullWidth, fullHeight, w * 0, h * 0, w, h );\n\t *   --B--\n\t *   camera.setViewOffset( fullWidth, fullHeight, w * 1, h * 0, w, h );\n\t *   --C--\n\t *   camera.setViewOffset( fullWidth, fullHeight, w * 2, h * 0, w, h );\n\t *   --D--\n\t *   camera.setViewOffset( fullWidth, fullHeight, w * 0, h * 1, w, h );\n\t *   --E--\n\t *   camera.setViewOffset( fullWidth, fullHeight, w * 1, h * 1, w, h );\n\t *   --F--\n\t *   camera.setViewOffset( fullWidth, fullHeight, w * 2, h * 1, w, h );\n\t *\n\t *   Note there is no reason monitors have to be the same size or in a grid.\n\t */\n\tsetViewOffset: function ( fullWidth, fullHeight, x, y, width, height ) {\n\n\t\tthis.aspect = fullWidth / fullHeight;\n\n\t\tif ( this.view === null ) {\n\n\t\t\tthis.view = {\n\t\t\t\tenabled: true,\n\t\t\t\tfullWidth: 1,\n\t\t\t\tfullHeight: 1,\n\t\t\t\toffsetX: 0,\n\t\t\t\toffsetY: 0,\n\t\t\t\twidth: 1,\n\t\t\t\theight: 1\n\t\t\t};\n\n\t\t}\n\n\t\tthis.view.enabled = true;\n\t\tthis.view.fullWidth = fullWidth;\n\t\tthis.view.fullHeight = fullHeight;\n\t\tthis.view.offsetX = x;\n\t\tthis.view.offsetY = y;\n\t\tthis.view.width = width;\n\t\tthis.view.height = height;\n\n\t\tthis.updateProjectionMatrix();\n\n\t},\n\n\tclearViewOffset: function () {\n\n\t\tif ( this.view !== null ) {\n\n\t\t\tthis.view.enabled = false;\n\n\t\t}\n\n\t\tthis.updateProjectionMatrix();\n\n\t},\n\n\tupdateProjectionMatrix: function () {\n\n\t\tconst near = this.near;\n\t\tlet top = near * Math.tan( MathUtils.DEG2RAD * 0.5 * this.fov ) / this.zoom;\n\t\tlet height = 2 * top;\n\t\tlet width = this.aspect * height;\n\t\tlet left = - 0.5 * width;\n\t\tconst view = this.view;\n\n\t\tif ( this.view !== null && this.view.enabled ) {\n\n\t\t\tconst fullWidth = view.fullWidth,\n\t\t\t\tfullHeight = view.fullHeight;\n\n\t\t\tleft += view.offsetX * width / fullWidth;\n\t\t\ttop -= view.offsetY * height / fullHeight;\n\t\t\twidth *= view.width / fullWidth;\n\t\t\theight *= view.height / fullHeight;\n\n\t\t}\n\n\t\tconst skew = this.filmOffset;\n\t\tif ( skew !== 0 ) left += near * skew / this.getFilmWidth();\n\n\t\tthis.projectionMatrix.makePerspective( left, left + width, top, top - height, near, this.far );\n\n\t\tthis.projectionMatrixInverse.copy( this.projectionMatrix ).invert();\n\n\t},\n\n\ttoJSON: function ( meta ) {\n\n\t\tconst data = Object3D.prototype.toJSON.call( this, meta );\n\n\t\tdata.object.fov = this.fov;\n\t\tdata.object.zoom = this.zoom;\n\n\t\tdata.object.near = this.near;\n\t\tdata.object.far = this.far;\n\t\tdata.object.focus = this.focus;\n\n\t\tdata.object.aspect = this.aspect;\n\n\t\tif ( this.view !== null ) data.object.view = Object.assign( {}, this.view );\n\n\t\tdata.object.filmGauge = this.filmGauge;\n\t\tdata.object.filmOffset = this.filmOffset;\n\n\t\treturn data;\n\n\t}\n\n} );\n\nconst fov = 90, aspect = 1;\n\nfunction CubeCamera( near, far, renderTarget ) {\n\n\tObject3D.call( this );\n\n\tthis.type = 'CubeCamera';\n\n\tif ( renderTarget.isWebGLCubeRenderTarget !== true ) {\n\n\t\tconsole.error( 'THREE.CubeCamera: The constructor now expects an instance of WebGLCubeRenderTarget as third parameter.' );\n\t\treturn;\n\n\t}\n\n\tthis.renderTarget = renderTarget;\n\n\tconst cameraPX = new PerspectiveCamera( fov, aspect, near, far );\n\tcameraPX.layers = this.layers;\n\tcameraPX.up.set( 0, - 1, 0 );\n\tcameraPX.lookAt( new Vector3( 1, 0, 0 ) );\n\tthis.add( cameraPX );\n\n\tconst cameraNX = new PerspectiveCamera( fov, aspect, near, far );\n\tcameraNX.layers = this.layers;\n\tcameraNX.up.set( 0, - 1, 0 );\n\tcameraNX.lookAt( new Vector3( - 1, 0, 0 ) );\n\tthis.add( cameraNX );\n\n\tconst cameraPY = new PerspectiveCamera( fov, aspect, near, far );\n\tcameraPY.layers = this.layers;\n\tcameraPY.up.set( 0, 0, 1 );\n\tcameraPY.lookAt( new Vector3( 0, 1, 0 ) );\n\tthis.add( cameraPY );\n\n\tconst cameraNY = new PerspectiveCamera( fov, aspect, near, far );\n\tcameraNY.layers = this.layers;\n\tcameraNY.up.set( 0, 0, - 1 );\n\tcameraNY.lookAt( new Vector3( 0, - 1, 0 ) );\n\tthis.add( cameraNY );\n\n\tconst cameraPZ = new PerspectiveCamera( fov, aspect, near, far );\n\tcameraPZ.layers = this.layers;\n\tcameraPZ.up.set( 0, - 1, 0 );\n\tcameraPZ.lookAt( new Vector3( 0, 0, 1 ) );\n\tthis.add( cameraPZ );\n\n\tconst cameraNZ = new PerspectiveCamera( fov, aspect, near, far );\n\tcameraNZ.layers = this.layers;\n\tcameraNZ.up.set( 0, - 1, 0 );\n\tcameraNZ.lookAt( new Vector3( 0, 0, - 1 ) );\n\tthis.add( cameraNZ );\n\n\tthis.update = function ( renderer, scene ) {\n\n\t\tif ( this.parent === null ) this.updateMatrixWorld();\n\n\t\tconst currentXrEnabled = renderer.xr.enabled;\n\t\tconst currentRenderTarget = renderer.getRenderTarget();\n\n\t\trenderer.xr.enabled = false;\n\n\t\tconst generateMipmaps = renderTarget.texture.generateMipmaps;\n\n\t\trenderTarget.texture.generateMipmaps = false;\n\n\t\trenderer.setRenderTarget( renderTarget, 0 );\n\t\trenderer.render( scene, cameraPX );\n\n\t\trenderer.setRenderTarget( renderTarget, 1 );\n\t\trenderer.render( scene, cameraNX );\n\n\t\trenderer.setRenderTarget( renderTarget, 2 );\n\t\trenderer.render( scene, cameraPY );\n\n\t\trenderer.setRenderTarget( renderTarget, 3 );\n\t\trenderer.render( scene, cameraNY );\n\n\t\trenderer.setRenderTarget( renderTarget, 4 );\n\t\trenderer.render( scene, cameraPZ );\n\n\t\trenderTarget.texture.generateMipmaps = generateMipmaps;\n\n\t\trenderer.setRenderTarget( renderTarget, 5 );\n\t\trenderer.render( scene, cameraNZ );\n\n\t\trenderer.setRenderTarget( currentRenderTarget );\n\n\t\trenderer.xr.enabled = currentXrEnabled;\n\n\t};\n\n}\n\nCubeCamera.prototype = Object.create( Object3D.prototype );\nCubeCamera.prototype.constructor = CubeCamera;\n\nfunction CubeTexture( images, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding ) {\n\n\timages = images !== undefined ? images : [];\n\tmapping = mapping !== undefined ? mapping : CubeReflectionMapping;\n\tformat = format !== undefined ? format : RGBFormat;\n\n\tTexture.call( this, images, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding );\n\n\tthis.flipY = false;\n\n\t// Why CubeTexture._needsFlipEnvMap is necessary:\n\t//\n\t// By convention -- likely based on the RenderMan spec from the 1990's -- cube maps are specified by WebGL (and three.js)\n\t// in a coordinate system in which positive-x is to the right when looking up the positive-z axis -- in other words,\n\t// in a left-handed coordinate system. By continuing this convention, preexisting cube maps continued to render correctly.\n\n\t// three.js uses a right-handed coordinate system. So environment maps used in three.js appear to have px and nx swapped\n\t// and the flag _needsFlipEnvMap controls this conversion. The flip is not required (and thus _needsFlipEnvMap is set to false)\n\t// when using WebGLCubeRenderTarget.texture as a cube texture.\n\n\tthis._needsFlipEnvMap = true;\n\n}\n\nCubeTexture.prototype = Object.create( Texture.prototype );\nCubeTexture.prototype.constructor = CubeTexture;\n\nCubeTexture.prototype.isCubeTexture = true;\n\nObject.defineProperty( CubeTexture.prototype, 'images', {\n\n\tget: function () {\n\n\t\treturn this.image;\n\n\t},\n\n\tset: function ( value ) {\n\n\t\tthis.image = value;\n\n\t}\n\n} );\n\nclass WebGLCubeRenderTarget extends WebGLRenderTarget {\n\n\tconstructor( size, options, dummy ) {\n\n\t\tif ( Number.isInteger( options ) ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLCubeRenderTarget: constructor signature is now WebGLCubeRenderTarget( size, options )' );\n\n\t\t\toptions = dummy;\n\n\t\t}\n\n\t\tsuper( size, size, options );\n\n\t\tObject.defineProperty( this, 'isWebGLCubeRenderTarget', { value: true } );\n\n\t\toptions = options || {};\n\n\t\tthis.texture = new CubeTexture( undefined, options.mapping, options.wrapS, options.wrapT, options.magFilter, options.minFilter, options.format, options.type, options.anisotropy, options.encoding );\n\n\t\tthis.texture._needsFlipEnvMap = false;\n\n\t}\n\n\tfromEquirectangularTexture( renderer, texture ) {\n\n\t\tthis.texture.type = texture.type;\n\t\tthis.texture.format = RGBAFormat; // see #18859\n\t\tthis.texture.encoding = texture.encoding;\n\n\t\tthis.texture.generateMipmaps = texture.generateMipmaps;\n\t\tthis.texture.minFilter = texture.minFilter;\n\t\tthis.texture.magFilter = texture.magFilter;\n\n\t\tconst shader = {\n\n\t\t\tuniforms: {\n\t\t\t\ttEquirect: { value: null },\n\t\t\t},\n\n\t\t\tvertexShader: /* glsl */`\n\n\t\t\t\tvarying vec3 vWorldDirection;\n\n\t\t\t\tvec3 transformDirection( in vec3 dir, in mat4 matrix ) {\n\n\t\t\t\t\treturn normalize( ( matrix * vec4( dir, 0.0 ) ).xyz );\n\n\t\t\t\t}\n\n\t\t\t\tvoid main() {\n\n\t\t\t\t\tvWorldDirection = transformDirection( position, modelMatrix );\n\n\t\t\t\t\t#include <begin_vertex>\n\t\t\t\t\t#include <project_vertex>\n\n\t\t\t\t}\n\t\t\t`,\n\n\t\t\tfragmentShader: /* glsl */`\n\n\t\t\t\tuniform sampler2D tEquirect;\n\n\t\t\t\tvarying vec3 vWorldDirection;\n\n\t\t\t\t#include <common>\n\n\t\t\t\tvoid main() {\n\n\t\t\t\t\tvec3 direction = normalize( vWorldDirection );\n\n\t\t\t\t\tvec2 sampleUV = equirectUv( direction );\n\n\t\t\t\t\tgl_FragColor = texture2D( tEquirect, sampleUV );\n\n\t\t\t\t}\n\t\t\t`\n\t\t};\n\n\t\tconst geometry = new BoxGeometry( 5, 5, 5 );\n\n\t\tconst material = new ShaderMaterial( {\n\n\t\t\tname: 'CubemapFromEquirect',\n\n\t\t\tuniforms: cloneUniforms( shader.uniforms ),\n\t\t\tvertexShader: shader.vertexShader,\n\t\t\tfragmentShader: shader.fragmentShader,\n\t\t\tside: BackSide,\n\t\t\tblending: NoBlending\n\n\t\t} );\n\n\t\tmaterial.uniforms.tEquirect.value = texture;\n\n\t\tconst mesh = new Mesh( geometry, material );\n\n\t\tconst currentMinFilter = texture.minFilter;\n\n\t\t// Avoid blurred poles\n\t\tif ( texture.minFilter === LinearMipmapLinearFilter ) texture.minFilter = LinearFilter;\n\n\t\tconst camera = new CubeCamera( 1, 10, this );\n\t\tcamera.update( renderer, mesh );\n\n\t\ttexture.minFilter = currentMinFilter;\n\n\t\tmesh.geometry.dispose();\n\t\tmesh.material.dispose();\n\n\t\treturn this;\n\n\t}\n\n\tclear( renderer, color, depth, stencil ) {\n\n\t\tconst currentRenderTarget = renderer.getRenderTarget();\n\n\t\tfor ( let i = 0; i < 6; i ++ ) {\n\n\t\t\trenderer.setRenderTarget( this, i );\n\n\t\t\trenderer.clear( color, depth, stencil );\n\n\t\t}\n\n\t\trenderer.setRenderTarget( currentRenderTarget );\n\n\t}\n\n}\n\nfunction DataTexture( data, width, height, format, type, mapping, wrapS, wrapT, magFilter, minFilter, anisotropy, encoding ) {\n\n\tTexture.call( this, null, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding );\n\n\tthis.image = { data: data || null, width: width || 1, height: height || 1 };\n\n\tthis.magFilter = magFilter !== undefined ? magFilter : NearestFilter;\n\tthis.minFilter = minFilter !== undefined ? minFilter : NearestFilter;\n\n\tthis.generateMipmaps = false;\n\tthis.flipY = false;\n\tthis.unpackAlignment = 1;\n\n\tthis.needsUpdate = true;\n\n}\n\nDataTexture.prototype = Object.create( Texture.prototype );\nDataTexture.prototype.constructor = DataTexture;\n\nDataTexture.prototype.isDataTexture = true;\n\nconst _sphere$1 = /*@__PURE__*/ new Sphere();\nconst _vector$5 = /*@__PURE__*/ new Vector3();\n\nclass Frustum {\n\n\tconstructor( p0, p1, p2, p3, p4, p5 ) {\n\n\t\tthis.planes = [\n\n\t\t\t( p0 !== undefined ) ? p0 : new Plane(),\n\t\t\t( p1 !== undefined ) ? p1 : new Plane(),\n\t\t\t( p2 !== undefined ) ? p2 : new Plane(),\n\t\t\t( p3 !== undefined ) ? p3 : new Plane(),\n\t\t\t( p4 !== undefined ) ? p4 : new Plane(),\n\t\t\t( p5 !== undefined ) ? p5 : new Plane()\n\n\t\t];\n\n\t}\n\n\tset( p0, p1, p2, p3, p4, p5 ) {\n\n\t\tconst planes = this.planes;\n\n\t\tplanes[ 0 ].copy( p0 );\n\t\tplanes[ 1 ].copy( p1 );\n\t\tplanes[ 2 ].copy( p2 );\n\t\tplanes[ 3 ].copy( p3 );\n\t\tplanes[ 4 ].copy( p4 );\n\t\tplanes[ 5 ].copy( p5 );\n\n\t\treturn this;\n\n\t}\n\n\tclone() {\n\n\t\treturn new this.constructor().copy( this );\n\n\t}\n\n\tcopy( frustum ) {\n\n\t\tconst planes = this.planes;\n\n\t\tfor ( let i = 0; i < 6; i ++ ) {\n\n\t\t\tplanes[ i ].copy( frustum.planes[ i ] );\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n\tsetFromProjectionMatrix( m ) {\n\n\t\tconst planes = this.planes;\n\t\tconst me = m.elements;\n\t\tconst me0 = me[ 0 ], me1 = me[ 1 ], me2 = me[ 2 ], me3 = me[ 3 ];\n\t\tconst me4 = me[ 4 ], me5 = me[ 5 ], me6 = me[ 6 ], me7 = me[ 7 ];\n\t\tconst me8 = me[ 8 ], me9 = me[ 9 ], me10 = me[ 10 ], me11 = me[ 11 ];\n\t\tconst me12 = me[ 12 ], me13 = me[ 13 ], me14 = me[ 14 ], me15 = me[ 15 ];\n\n\t\tplanes[ 0 ].setComponents( me3 - me0, me7 - me4, me11 - me8, me15 - me12 ).normalize();\n\t\tplanes[ 1 ].setComponents( me3 + me0, me7 + me4, me11 + me8, me15 + me12 ).normalize();\n\t\tplanes[ 2 ].setComponents( me3 + me1, me7 + me5, me11 + me9, me15 + me13 ).normalize();\n\t\tplanes[ 3 ].setComponents( me3 - me1, me7 - me5, me11 - me9, me15 - me13 ).normalize();\n\t\tplanes[ 4 ].setComponents( me3 - me2, me7 - me6, me11 - me10, me15 - me14 ).normalize();\n\t\tplanes[ 5 ].setComponents( me3 + me2, me7 + me6, me11 + me10, me15 + me14 ).normalize();\n\n\t\treturn this;\n\n\t}\n\n\tintersectsObject( object ) {\n\n\t\tconst geometry = object.geometry;\n\n\t\tif ( geometry.boundingSphere === null ) geometry.computeBoundingSphere();\n\n\t\t_sphere$1.copy( geometry.boundingSphere ).applyMatrix4( object.matrixWorld );\n\n\t\treturn this.intersectsSphere( _sphere$1 );\n\n\t}\n\n\tintersectsSprite( sprite ) {\n\n\t\t_sphere$1.center.set( 0, 0, 0 );\n\t\t_sphere$1.radius = 0.7071067811865476;\n\t\t_sphere$1.applyMatrix4( sprite.matrixWorld );\n\n\t\treturn this.intersectsSphere( _sphere$1 );\n\n\t}\n\n\tintersectsSphere( sphere ) {\n\n\t\tconst planes = this.planes;\n\t\tconst center = sphere.center;\n\t\tconst negRadius = - sphere.radius;\n\n\t\tfor ( let i = 0; i < 6; i ++ ) {\n\n\t\t\tconst distance = planes[ i ].distanceToPoint( center );\n\n\t\t\tif ( distance < negRadius ) {\n\n\t\t\t\treturn false;\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn true;\n\n\t}\n\n\tintersectsBox( box ) {\n\n\t\tconst planes = this.planes;\n\n\t\tfor ( let i = 0; i < 6; i ++ ) {\n\n\t\t\tconst plane = planes[ i ];\n\n\t\t\t// corner at max distance\n\n\t\t\t_vector$5.x = plane.normal.x > 0 ? box.max.x : box.min.x;\n\t\t\t_vector$5.y = plane.normal.y > 0 ? box.max.y : box.min.y;\n\t\t\t_vector$5.z = plane.normal.z > 0 ? box.max.z : box.min.z;\n\n\t\t\tif ( plane.distanceToPoint( _vector$5 ) < 0 ) {\n\n\t\t\t\treturn false;\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn true;\n\n\t}\n\n\tcontainsPoint( point ) {\n\n\t\tconst planes = this.planes;\n\n\t\tfor ( let i = 0; i < 6; i ++ ) {\n\n\t\t\tif ( planes[ i ].distanceToPoint( point ) < 0 ) {\n\n\t\t\t\treturn false;\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn true;\n\n\t}\n\n}\n\nfunction WebGLAnimation() {\n\n\tlet context = null;\n\tlet isAnimating = false;\n\tlet animationLoop = null;\n\tlet requestId = null;\n\n\tfunction onAnimationFrame( time, frame ) {\n\n\t\tanimationLoop( time, frame );\n\n\t\trequestId = context.requestAnimationFrame( onAnimationFrame );\n\n\t}\n\n\treturn {\n\n\t\tstart: function () {\n\n\t\t\tif ( isAnimating === true ) return;\n\t\t\tif ( animationLoop === null ) return;\n\n\t\t\trequestId = context.requestAnimationFrame( onAnimationFrame );\n\n\t\t\tisAnimating = true;\n\n\t\t},\n\n\t\tstop: function () {\n\n\t\t\tcontext.cancelAnimationFrame( requestId );\n\n\t\t\tisAnimating = false;\n\n\t\t},\n\n\t\tsetAnimationLoop: function ( callback ) {\n\n\t\t\tanimationLoop = callback;\n\n\t\t},\n\n\t\tsetContext: function ( value ) {\n\n\t\t\tcontext = value;\n\n\t\t}\n\n\t};\n\n}\n\nfunction WebGLAttributes( gl, capabilities ) {\n\n\tconst isWebGL2 = capabilities.isWebGL2;\n\n\tconst buffers = new WeakMap();\n\n\tfunction createBuffer( attribute, bufferType ) {\n\n\t\tconst array = attribute.array;\n\t\tconst usage = attribute.usage;\n\n\t\tconst buffer = gl.createBuffer();\n\n\t\tgl.bindBuffer( bufferType, buffer );\n\t\tgl.bufferData( bufferType, array, usage );\n\n\t\tattribute.onUploadCallback();\n\n\t\tlet type = 5126;\n\n\t\tif ( array instanceof Float32Array ) {\n\n\t\t\ttype = 5126;\n\n\t\t} else if ( array instanceof Float64Array ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLAttributes: Unsupported data buffer format: Float64Array.' );\n\n\t\t} else if ( array instanceof Uint16Array ) {\n\n\t\t\tif ( attribute.isFloat16BufferAttribute ) {\n\n\t\t\t\tif ( isWebGL2 ) {\n\n\t\t\t\t\ttype = 5131;\n\n\t\t\t\t} else {\n\n\t\t\t\t\tconsole.warn( 'THREE.WebGLAttributes: Usage of Float16BufferAttribute requires WebGL2.' );\n\n\t\t\t\t}\n\n\t\t\t} else {\n\n\t\t\t\ttype = 5123;\n\n\t\t\t}\n\n\t\t} else if ( array instanceof Int16Array ) {\n\n\t\t\ttype = 5122;\n\n\t\t} else if ( array instanceof Uint32Array ) {\n\n\t\t\ttype = 5125;\n\n\t\t} else if ( array instanceof Int32Array ) {\n\n\t\t\ttype = 5124;\n\n\t\t} else if ( array instanceof Int8Array ) {\n\n\t\t\ttype = 5120;\n\n\t\t} else if ( array instanceof Uint8Array ) {\n\n\t\t\ttype = 5121;\n\n\t\t}\n\n\t\treturn {\n\t\t\tbuffer: buffer,\n\t\t\ttype: type,\n\t\t\tbytesPerElement: array.BYTES_PER_ELEMENT,\n\t\t\tversion: attribute.version\n\t\t};\n\n\t}\n\n\tfunction updateBuffer( buffer, attribute, bufferType ) {\n\n\t\tconst array = attribute.array;\n\t\tconst updateRange = attribute.updateRange;\n\n\t\tgl.bindBuffer( bufferType, buffer );\n\n\t\tif ( updateRange.count === - 1 ) {\n\n\t\t\t// Not using update ranges\n\n\t\t\tgl.bufferSubData( bufferType, 0, array );\n\n\t\t} else {\n\n\t\t\tif ( isWebGL2 ) {\n\n\t\t\t\tgl.bufferSubData( bufferType, updateRange.offset * array.BYTES_PER_ELEMENT,\n\t\t\t\t\tarray, updateRange.offset, updateRange.count );\n\n\t\t\t} else {\n\n\t\t\t\tgl.bufferSubData( bufferType, updateRange.offset * array.BYTES_PER_ELEMENT,\n\t\t\t\t\tarray.subarray( updateRange.offset, updateRange.offset + updateRange.count ) );\n\n\t\t\t}\n\n\t\t\tupdateRange.count = - 1; // reset range\n\n\t\t}\n\n\t}\n\n\t//\n\n\tfunction get( attribute ) {\n\n\t\tif ( attribute.isInterleavedBufferAttribute ) attribute = attribute.data;\n\n\t\treturn buffers.get( attribute );\n\n\t}\n\n\tfunction remove( attribute ) {\n\n\t\tif ( attribute.isInterleavedBufferAttribute ) attribute = attribute.data;\n\n\t\tconst data = buffers.get( attribute );\n\n\t\tif ( data ) {\n\n\t\t\tgl.deleteBuffer( data.buffer );\n\n\t\t\tbuffers.delete( attribute );\n\n\t\t}\n\n\t}\n\n\tfunction update( attribute, bufferType ) {\n\n\t\tif ( attribute.isGLBufferAttribute ) {\n\n\t\t\tconst cached = buffers.get( attribute );\n\n\t\t\tif ( ! cached || cached.version < attribute.version ) {\n\n\t\t\t\tbuffers.set( attribute, {\n\t\t\t\t\tbuffer: attribute.buffer,\n\t\t\t\t\ttype: attribute.type,\n\t\t\t\t\tbytesPerElement: attribute.elementSize,\n\t\t\t\t\tversion: attribute.version\n\t\t\t\t} );\n\n\t\t\t}\n\n\t\t\treturn;\n\n\t\t}\n\n\t\tif ( attribute.isInterleavedBufferAttribute ) attribute = attribute.data;\n\n\t\tconst data = buffers.get( attribute );\n\n\t\tif ( data === undefined ) {\n\n\t\t\tbuffers.set( attribute, createBuffer( attribute, bufferType ) );\n\n\t\t} else if ( data.version < attribute.version ) {\n\n\t\t\tupdateBuffer( data.buffer, attribute, bufferType );\n\n\t\t\tdata.version = attribute.version;\n\n\t\t}\n\n\t}\n\n\treturn {\n\n\t\tget: get,\n\t\tremove: remove,\n\t\tupdate: update\n\n\t};\n\n}\n\nclass PlaneGeometry extends BufferGeometry {\n\n\tconstructor( width = 1, height = 1, widthSegments = 1, heightSegments = 1 ) {\n\n\t\tsuper();\n\t\tthis.type = 'PlaneGeometry';\n\n\t\tthis.parameters = {\n\t\t\twidth: width,\n\t\t\theight: height,\n\t\t\twidthSegments: widthSegments,\n\t\t\theightSegments: heightSegments\n\t\t};\n\n\t\tconst width_half = width / 2;\n\t\tconst height_half = height / 2;\n\n\t\tconst gridX = Math.floor( widthSegments );\n\t\tconst gridY = Math.floor( heightSegments );\n\n\t\tconst gridX1 = gridX + 1;\n\t\tconst gridY1 = gridY + 1;\n\n\t\tconst segment_width = width / gridX;\n\t\tconst segment_height = height / gridY;\n\n\t\t//\n\n\t\tconst indices = [];\n\t\tconst vertices = [];\n\t\tconst normals = [];\n\t\tconst uvs = [];\n\n\t\tfor ( let iy = 0; iy < gridY1; iy ++ ) {\n\n\t\t\tconst y = iy * segment_height - height_half;\n\n\t\t\tfor ( let ix = 0; ix < gridX1; ix ++ ) {\n\n\t\t\t\tconst x = ix * segment_width - width_half;\n\n\t\t\t\tvertices.push( x, - y, 0 );\n\n\t\t\t\tnormals.push( 0, 0, 1 );\n\n\t\t\t\tuvs.push( ix / gridX );\n\t\t\t\tuvs.push( 1 - ( iy / gridY ) );\n\n\t\t\t}\n\n\t\t}\n\n\t\tfor ( let iy = 0; iy < gridY; iy ++ ) {\n\n\t\t\tfor ( let ix = 0; ix < gridX; ix ++ ) {\n\n\t\t\t\tconst a = ix + gridX1 * iy;\n\t\t\t\tconst b = ix + gridX1 * ( iy + 1 );\n\t\t\t\tconst c = ( ix + 1 ) + gridX1 * ( iy + 1 );\n\t\t\t\tconst d = ( ix + 1 ) + gridX1 * iy;\n\n\t\t\t\tindices.push( a, b, d );\n\t\t\t\tindices.push( b, c, d );\n\n\t\t\t}\n\n\t\t}\n\n\t\tthis.setIndex( indices );\n\t\tthis.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\t\tthis.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );\n\t\tthis.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );\n\n\t}\n\n}\n\nvar alphamap_fragment = \"#ifdef USE_ALPHAMAP\\n\\tdiffuseColor.a *= texture2D( alphaMap, vUv ).g;\\n#endif\";\n\nvar alphamap_pars_fragment = \"#ifdef USE_ALPHAMAP\\n\\tuniform sampler2D alphaMap;\\n#endif\";\n\nvar alphatest_fragment = \"#ifdef ALPHATEST\\n\\tif ( diffuseColor.a < ALPHATEST ) discard;\\n#endif\";\n\nvar aomap_fragment = \"#ifdef USE_AOMAP\\n\\tfloat ambientOcclusion = ( texture2D( aoMap, vUv2 ).r - 1.0 ) * aoMapIntensity + 1.0;\\n\\treflectedLight.indirectDiffuse *= ambientOcclusion;\\n\\t#if defined( USE_ENVMAP ) && defined( STANDARD )\\n\\t\\tfloat dotNV = saturate( dot( geometry.normal, geometry.viewDir ) );\\n\\t\\treflectedLight.indirectSpecular *= computeSpecularOcclusion( dotNV, ambientOcclusion, material.specularRoughness );\\n\\t#endif\\n#endif\";\n\nvar aomap_pars_fragment = \"#ifdef USE_AOMAP\\n\\tuniform sampler2D aoMap;\\n\\tuniform float aoMapIntensity;\\n#endif\";\n\nvar begin_vertex = \"vec3 transformed = vec3( position );\";\n\nvar beginnormal_vertex = \"vec3 objectNormal = vec3( normal );\\n#ifdef USE_TANGENT\\n\\tvec3 objectTangent = vec3( tangent.xyz );\\n#endif\";\n\nvar bsdfs = \"vec2 integrateSpecularBRDF( const in float dotNV, const in float roughness ) {\\n\\tconst vec4 c0 = vec4( - 1, - 0.0275, - 0.572, 0.022 );\\n\\tconst vec4 c1 = vec4( 1, 0.0425, 1.04, - 0.04 );\\n\\tvec4 r = roughness * c0 + c1;\\n\\tfloat a004 = min( r.x * r.x, exp2( - 9.28 * dotNV ) ) * r.x + r.y;\\n\\treturn vec2( -1.04, 1.04 ) * a004 + r.zw;\\n}\\nfloat punctualLightIntensityToIrradianceFactor( const in float lightDistance, const in float cutoffDistance, const in float decayExponent ) {\\n#if defined ( PHYSICALLY_CORRECT_LIGHTS )\\n\\tfloat distanceFalloff = 1.0 / max( pow( lightDistance, decayExponent ), 0.01 );\\n\\tif( cutoffDistance > 0.0 ) {\\n\\t\\tdistanceFalloff *= pow2( saturate( 1.0 - pow4( lightDistance / cutoffDistance ) ) );\\n\\t}\\n\\treturn distanceFalloff;\\n#else\\n\\tif( cutoffDistance > 0.0 && decayExponent > 0.0 ) {\\n\\t\\treturn pow( saturate( -lightDistance / cutoffDistance + 1.0 ), decayExponent );\\n\\t}\\n\\treturn 1.0;\\n#endif\\n}\\nvec3 BRDF_Diffuse_Lambert( const in vec3 diffuseColor ) {\\n\\treturn RECIPROCAL_PI * diffuseColor;\\n}\\nvec3 F_Schlick( const in vec3 specularColor, const in float dotLH ) {\\n\\tfloat fresnel = exp2( ( -5.55473 * dotLH - 6.98316 ) * dotLH );\\n\\treturn ( 1.0 - specularColor ) * fresnel + specularColor;\\n}\\nvec3 F_Schlick_RoughnessDependent( const in vec3 F0, const in float dotNV, const in float roughness ) {\\n\\tfloat fresnel = exp2( ( -5.55473 * dotNV - 6.98316 ) * dotNV );\\n\\tvec3 Fr = max( vec3( 1.0 - roughness ), F0 ) - F0;\\n\\treturn Fr * fresnel + F0;\\n}\\nfloat G_GGX_Smith( const in float alpha, const in float dotNL, const in float dotNV ) {\\n\\tfloat a2 = pow2( alpha );\\n\\tfloat gl = dotNL + sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNL ) );\\n\\tfloat gv = dotNV + sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNV ) );\\n\\treturn 1.0 / ( gl * gv );\\n}\\nfloat G_GGX_SmithCorrelated( const in float alpha, const in float dotNL, const in float dotNV ) {\\n\\tfloat a2 = pow2( alpha );\\n\\tfloat gv = dotNL * sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNV ) );\\n\\tfloat gl = dotNV * sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNL ) );\\n\\treturn 0.5 / max( gv + gl, EPSILON );\\n}\\nfloat D_GGX( const in float alpha, const in float dotNH ) {\\n\\tfloat a2 = pow2( alpha );\\n\\tfloat denom = pow2( dotNH ) * ( a2 - 1.0 ) + 1.0;\\n\\treturn RECIPROCAL_PI * a2 / pow2( denom );\\n}\\nvec3 BRDF_Specular_GGX( const in IncidentLight incidentLight, const in vec3 viewDir, const in vec3 normal, const in vec3 specularColor, const in float roughness ) {\\n\\tfloat alpha = pow2( roughness );\\n\\tvec3 halfDir = normalize( incidentLight.direction + viewDir );\\n\\tfloat dotNL = saturate( dot( normal, incidentLight.direction ) );\\n\\tfloat dotNV = saturate( dot( normal, viewDir ) );\\n\\tfloat dotNH = saturate( dot( normal, halfDir ) );\\n\\tfloat dotLH = saturate( dot( incidentLight.direction, halfDir ) );\\n\\tvec3 F = F_Schlick( specularColor, dotLH );\\n\\tfloat G = G_GGX_SmithCorrelated( alpha, dotNL, dotNV );\\n\\tfloat D = D_GGX( alpha, dotNH );\\n\\treturn F * ( G * D );\\n}\\nvec2 LTC_Uv( const in vec3 N, const in vec3 V, const in float roughness ) {\\n\\tconst float LUT_SIZE = 64.0;\\n\\tconst float LUT_SCALE = ( LUT_SIZE - 1.0 ) / LUT_SIZE;\\n\\tconst float LUT_BIAS = 0.5 / LUT_SIZE;\\n\\tfloat dotNV = saturate( dot( N, V ) );\\n\\tvec2 uv = vec2( roughness, sqrt( 1.0 - dotNV ) );\\n\\tuv = uv * LUT_SCALE + LUT_BIAS;\\n\\treturn uv;\\n}\\nfloat LTC_ClippedSphereFormFactor( const in vec3 f ) {\\n\\tfloat l = length( f );\\n\\treturn max( ( l * l + f.z ) / ( l + 1.0 ), 0.0 );\\n}\\nvec3 LTC_EdgeVectorFormFactor( const in vec3 v1, const in vec3 v2 ) {\\n\\tfloat x = dot( v1, v2 );\\n\\tfloat y = abs( x );\\n\\tfloat a = 0.8543985 + ( 0.4965155 + 0.0145206 * y ) * y;\\n\\tfloat b = 3.4175940 + ( 4.1616724 + y ) * y;\\n\\tfloat v = a / b;\\n\\tfloat theta_sintheta = ( x > 0.0 ) ? v : 0.5 * inversesqrt( max( 1.0 - x * x, 1e-7 ) ) - v;\\n\\treturn cross( v1, v2 ) * theta_sintheta;\\n}\\nvec3 LTC_Evaluate( const in vec3 N, const in vec3 V, const in vec3 P, const in mat3 mInv, const in vec3 rectCoords[ 4 ] ) {\\n\\tvec3 v1 = rectCoords[ 1 ] - rectCoords[ 0 ];\\n\\tvec3 v2 = rectCoords[ 3 ] - rectCoords[ 0 ];\\n\\tvec3 lightNormal = cross( v1, v2 );\\n\\tif( dot( lightNormal, P - rectCoords[ 0 ] ) < 0.0 ) return vec3( 0.0 );\\n\\tvec3 T1, T2;\\n\\tT1 = normalize( V - N * dot( V, N ) );\\n\\tT2 = - cross( N, T1 );\\n\\tmat3 mat = mInv * transposeMat3( mat3( T1, T2, N ) );\\n\\tvec3 coords[ 4 ];\\n\\tcoords[ 0 ] = mat * ( rectCoords[ 0 ] - P );\\n\\tcoords[ 1 ] = mat * ( rectCoords[ 1 ] - P );\\n\\tcoords[ 2 ] = mat * ( rectCoords[ 2 ] - P );\\n\\tcoords[ 3 ] = mat * ( rectCoords[ 3 ] - P );\\n\\tcoords[ 0 ] = normalize( coords[ 0 ] );\\n\\tcoords[ 1 ] = normalize( coords[ 1 ] );\\n\\tcoords[ 2 ] = normalize( coords[ 2 ] );\\n\\tcoords[ 3 ] = normalize( coords[ 3 ] );\\n\\tvec3 vectorFormFactor = vec3( 0.0 );\\n\\tvectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 0 ], coords[ 1 ] );\\n\\tvectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 1 ], coords[ 2 ] );\\n\\tvectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 2 ], coords[ 3 ] );\\n\\tvectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 3 ], coords[ 0 ] );\\n\\tfloat result = LTC_ClippedSphereFormFactor( vectorFormFactor );\\n\\treturn vec3( result );\\n}\\nvec3 BRDF_Specular_GGX_Environment( const in vec3 viewDir, const in vec3 normal, const in vec3 specularColor, const in float roughness ) {\\n\\tfloat dotNV = saturate( dot( normal, viewDir ) );\\n\\tvec2 brdf = integrateSpecularBRDF( dotNV, roughness );\\n\\treturn specularColor * brdf.x + brdf.y;\\n}\\nvoid BRDF_Specular_Multiscattering_Environment( const in GeometricContext geometry, const in vec3 specularColor, const in float roughness, inout vec3 singleScatter, inout vec3 multiScatter ) {\\n\\tfloat dotNV = saturate( dot( geometry.normal, geometry.viewDir ) );\\n\\tvec3 F = F_Schlick_RoughnessDependent( specularColor, dotNV, roughness );\\n\\tvec2 brdf = integrateSpecularBRDF( dotNV, roughness );\\n\\tvec3 FssEss = F * brdf.x + brdf.y;\\n\\tfloat Ess = brdf.x + brdf.y;\\n\\tfloat Ems = 1.0 - Ess;\\n\\tvec3 Favg = specularColor + ( 1.0 - specularColor ) * 0.047619;\\tvec3 Fms = FssEss * Favg / ( 1.0 - Ems * Favg );\\n\\tsingleScatter += FssEss;\\n\\tmultiScatter += Fms * Ems;\\n}\\nfloat G_BlinnPhong_Implicit( ) {\\n\\treturn 0.25;\\n}\\nfloat D_BlinnPhong( const in float shininess, const in float dotNH ) {\\n\\treturn RECIPROCAL_PI * ( shininess * 0.5 + 1.0 ) * pow( dotNH, shininess );\\n}\\nvec3 BRDF_Specular_BlinnPhong( const in IncidentLight incidentLight, const in GeometricContext geometry, const in vec3 specularColor, const in float shininess ) {\\n\\tvec3 halfDir = normalize( incidentLight.direction + geometry.viewDir );\\n\\tfloat dotNH = saturate( dot( geometry.normal, halfDir ) );\\n\\tfloat dotLH = saturate( dot( incidentLight.direction, halfDir ) );\\n\\tvec3 F = F_Schlick( specularColor, dotLH );\\n\\tfloat G = G_BlinnPhong_Implicit( );\\n\\tfloat D = D_BlinnPhong( shininess, dotNH );\\n\\treturn F * ( G * D );\\n}\\nfloat GGXRoughnessToBlinnExponent( const in float ggxRoughness ) {\\n\\treturn ( 2.0 / pow2( ggxRoughness + 0.0001 ) - 2.0 );\\n}\\nfloat BlinnExponentToGGXRoughness( const in float blinnExponent ) {\\n\\treturn sqrt( 2.0 / ( blinnExponent + 2.0 ) );\\n}\\n#if defined( USE_SHEEN )\\nfloat D_Charlie(float roughness, float NoH) {\\n\\tfloat invAlpha = 1.0 / roughness;\\n\\tfloat cos2h = NoH * NoH;\\n\\tfloat sin2h = max(1.0 - cos2h, 0.0078125);\\treturn (2.0 + invAlpha) * pow(sin2h, invAlpha * 0.5) / (2.0 * PI);\\n}\\nfloat V_Neubelt(float NoV, float NoL) {\\n\\treturn saturate(1.0 / (4.0 * (NoL + NoV - NoL * NoV)));\\n}\\nvec3 BRDF_Specular_Sheen( const in float roughness, const in vec3 L, const in GeometricContext geometry, vec3 specularColor ) {\\n\\tvec3 N = geometry.normal;\\n\\tvec3 V = geometry.viewDir;\\n\\tvec3 H = normalize( V + L );\\n\\tfloat dotNH = saturate( dot( N, H ) );\\n\\treturn specularColor * D_Charlie( roughness, dotNH ) * V_Neubelt( dot(N, V), dot(N, L) );\\n}\\n#endif\";\n\nvar bumpmap_pars_fragment = \"#ifdef USE_BUMPMAP\\n\\tuniform sampler2D bumpMap;\\n\\tuniform float bumpScale;\\n\\tvec2 dHdxy_fwd() {\\n\\t\\tvec2 dSTdx = dFdx( vUv );\\n\\t\\tvec2 dSTdy = dFdy( vUv );\\n\\t\\tfloat Hll = bumpScale * texture2D( bumpMap, vUv ).x;\\n\\t\\tfloat dBx = bumpScale * texture2D( bumpMap, vUv + dSTdx ).x - Hll;\\n\\t\\tfloat dBy = bumpScale * texture2D( bumpMap, vUv + dSTdy ).x - Hll;\\n\\t\\treturn vec2( dBx, dBy );\\n\\t}\\n\\tvec3 perturbNormalArb( vec3 surf_pos, vec3 surf_norm, vec2 dHdxy ) {\\n\\t\\tvec3 vSigmaX = vec3( dFdx( surf_pos.x ), dFdx( surf_pos.y ), dFdx( surf_pos.z ) );\\n\\t\\tvec3 vSigmaY = vec3( dFdy( surf_pos.x ), dFdy( surf_pos.y ), dFdy( surf_pos.z ) );\\n\\t\\tvec3 vN = surf_norm;\\n\\t\\tvec3 R1 = cross( vSigmaY, vN );\\n\\t\\tvec3 R2 = cross( vN, vSigmaX );\\n\\t\\tfloat fDet = dot( vSigmaX, R1 );\\n\\t\\tfDet *= ( float( gl_FrontFacing ) * 2.0 - 1.0 );\\n\\t\\tvec3 vGrad = sign( fDet ) * ( dHdxy.x * R1 + dHdxy.y * R2 );\\n\\t\\treturn normalize( abs( fDet ) * surf_norm - vGrad );\\n\\t}\\n#endif\";\n\nvar clipping_planes_fragment = \"#if NUM_CLIPPING_PLANES > 0\\n\\tvec4 plane;\\n\\t#pragma unroll_loop_start\\n\\tfor ( int i = 0; i < UNION_CLIPPING_PLANES; i ++ ) {\\n\\t\\tplane = clippingPlanes[ i ];\\n\\t\\tif ( dot( vClipPosition, plane.xyz ) > plane.w ) discard;\\n\\t}\\n\\t#pragma unroll_loop_end\\n\\t#if UNION_CLIPPING_PLANES < NUM_CLIPPING_PLANES\\n\\t\\tbool clipped = true;\\n\\t\\t#pragma unroll_loop_start\\n\\t\\tfor ( int i = UNION_CLIPPING_PLANES; i < NUM_CLIPPING_PLANES; i ++ ) {\\n\\t\\t\\tplane = clippingPlanes[ i ];\\n\\t\\t\\tclipped = ( dot( vClipPosition, plane.xyz ) > plane.w ) && clipped;\\n\\t\\t}\\n\\t\\t#pragma unroll_loop_end\\n\\t\\tif ( clipped ) discard;\\n\\t#endif\\n#endif\";\n\nvar clipping_planes_pars_fragment = \"#if NUM_CLIPPING_PLANES > 0\\n\\tvarying vec3 vClipPosition;\\n\\tuniform vec4 clippingPlanes[ NUM_CLIPPING_PLANES ];\\n#endif\";\n\nvar clipping_planes_pars_vertex = \"#if NUM_CLIPPING_PLANES > 0\\n\\tvarying vec3 vClipPosition;\\n#endif\";\n\nvar clipping_planes_vertex = \"#if NUM_CLIPPING_PLANES > 0\\n\\tvClipPosition = - mvPosition.xyz;\\n#endif\";\n\nvar color_fragment = \"#ifdef USE_COLOR\\n\\tdiffuseColor.rgb *= vColor;\\n#endif\";\n\nvar color_pars_fragment = \"#ifdef USE_COLOR\\n\\tvarying vec3 vColor;\\n#endif\";\n\nvar color_pars_vertex = \"#if defined( USE_COLOR ) || defined( USE_INSTANCING_COLOR )\\n\\tvarying vec3 vColor;\\n#endif\";\n\nvar color_vertex = \"#if defined( USE_COLOR ) || defined( USE_INSTANCING_COLOR )\\n\\tvColor = vec3( 1.0 );\\n#endif\\n#ifdef USE_COLOR\\n\\tvColor.xyz *= color.xyz;\\n#endif\\n#ifdef USE_INSTANCING_COLOR\\n\\tvColor.xyz *= instanceColor.xyz;\\n#endif\";\n\nvar common = \"#define PI 3.141592653589793\\n#define PI2 6.283185307179586\\n#define PI_HALF 1.5707963267948966\\n#define RECIPROCAL_PI 0.3183098861837907\\n#define RECIPROCAL_PI2 0.15915494309189535\\n#define EPSILON 1e-6\\n#ifndef saturate\\n#define saturate(a) clamp( a, 0.0, 1.0 )\\n#endif\\n#define whiteComplement(a) ( 1.0 - saturate( a ) )\\nfloat pow2( const in float x ) { return x*x; }\\nfloat pow3( const in float x ) { return x*x*x; }\\nfloat pow4( const in float x ) { float x2 = x*x; return x2*x2; }\\nfloat average( const in vec3 color ) { return dot( color, vec3( 0.3333 ) ); }\\nhighp float rand( const in vec2 uv ) {\\n\\tconst highp float a = 12.9898, b = 78.233, c = 43758.5453;\\n\\thighp float dt = dot( uv.xy, vec2( a,b ) ), sn = mod( dt, PI );\\n\\treturn fract(sin(sn) * c);\\n}\\n#ifdef HIGH_PRECISION\\n\\tfloat precisionSafeLength( vec3 v ) { return length( v ); }\\n#else\\n\\tfloat max3( vec3 v ) { return max( max( v.x, v.y ), v.z ); }\\n\\tfloat precisionSafeLength( vec3 v ) {\\n\\t\\tfloat maxComponent = max3( abs( v ) );\\n\\t\\treturn length( v / maxComponent ) * maxComponent;\\n\\t}\\n#endif\\nstruct IncidentLight {\\n\\tvec3 color;\\n\\tvec3 direction;\\n\\tbool visible;\\n};\\nstruct ReflectedLight {\\n\\tvec3 directDiffuse;\\n\\tvec3 directSpecular;\\n\\tvec3 indirectDiffuse;\\n\\tvec3 indirectSpecular;\\n};\\nstruct GeometricContext {\\n\\tvec3 position;\\n\\tvec3 normal;\\n\\tvec3 viewDir;\\n#ifdef CLEARCOAT\\n\\tvec3 clearcoatNormal;\\n#endif\\n};\\nvec3 transformDirection( in vec3 dir, in mat4 matrix ) {\\n\\treturn normalize( ( matrix * vec4( dir, 0.0 ) ).xyz );\\n}\\nvec3 inverseTransformDirection( in vec3 dir, in mat4 matrix ) {\\n\\treturn normalize( ( vec4( dir, 0.0 ) * matrix ).xyz );\\n}\\nvec3 projectOnPlane(in vec3 point, in vec3 pointOnPlane, in vec3 planeNormal ) {\\n\\tfloat distance = dot( planeNormal, point - pointOnPlane );\\n\\treturn - distance * planeNormal + point;\\n}\\nfloat sideOfPlane( in vec3 point, in vec3 pointOnPlane, in vec3 planeNormal ) {\\n\\treturn sign( dot( point - pointOnPlane, planeNormal ) );\\n}\\nvec3 linePlaneIntersect( in vec3 pointOnLine, in vec3 lineDirection, in vec3 pointOnPlane, in vec3 planeNormal ) {\\n\\treturn lineDirection * ( dot( planeNormal, pointOnPlane - pointOnLine ) / dot( planeNormal, lineDirection ) ) + pointOnLine;\\n}\\nmat3 transposeMat3( const in mat3 m ) {\\n\\tmat3 tmp;\\n\\ttmp[ 0 ] = vec3( m[ 0 ].x, m[ 1 ].x, m[ 2 ].x );\\n\\ttmp[ 1 ] = vec3( m[ 0 ].y, m[ 1 ].y, m[ 2 ].y );\\n\\ttmp[ 2 ] = vec3( m[ 0 ].z, m[ 1 ].z, m[ 2 ].z );\\n\\treturn tmp;\\n}\\nfloat linearToRelativeLuminance( const in vec3 color ) {\\n\\tvec3 weights = vec3( 0.2126, 0.7152, 0.0722 );\\n\\treturn dot( weights, color.rgb );\\n}\\nbool isPerspectiveMatrix( mat4 m ) {\\n\\treturn m[ 2 ][ 3 ] == - 1.0;\\n}\\nvec2 equirectUv( in vec3 dir ) {\\n\\tfloat u = atan( dir.z, dir.x ) * RECIPROCAL_PI2 + 0.5;\\n\\tfloat v = asin( clamp( dir.y, - 1.0, 1.0 ) ) * RECIPROCAL_PI + 0.5;\\n\\treturn vec2( u, v );\\n}\";\n\nvar cube_uv_reflection_fragment = \"#ifdef ENVMAP_TYPE_CUBE_UV\\n\\t#define cubeUV_maxMipLevel 8.0\\n\\t#define cubeUV_minMipLevel 4.0\\n\\t#define cubeUV_maxTileSize 256.0\\n\\t#define cubeUV_minTileSize 16.0\\n\\tfloat getFace( vec3 direction ) {\\n\\t\\tvec3 absDirection = abs( direction );\\n\\t\\tfloat face = - 1.0;\\n\\t\\tif ( absDirection.x > absDirection.z ) {\\n\\t\\t\\tif ( absDirection.x > absDirection.y )\\n\\t\\t\\t\\tface = direction.x > 0.0 ? 0.0 : 3.0;\\n\\t\\t\\telse\\n\\t\\t\\t\\tface = direction.y > 0.0 ? 1.0 : 4.0;\\n\\t\\t} else {\\n\\t\\t\\tif ( absDirection.z > absDirection.y )\\n\\t\\t\\t\\tface = direction.z > 0.0 ? 2.0 : 5.0;\\n\\t\\t\\telse\\n\\t\\t\\t\\tface = direction.y > 0.0 ? 1.0 : 4.0;\\n\\t\\t}\\n\\t\\treturn face;\\n\\t}\\n\\tvec2 getUV( vec3 direction, float face ) {\\n\\t\\tvec2 uv;\\n\\t\\tif ( face == 0.0 ) {\\n\\t\\t\\tuv = vec2( direction.z, direction.y ) / abs( direction.x );\\n\\t\\t} else if ( face == 1.0 ) {\\n\\t\\t\\tuv = vec2( - direction.x, - direction.z ) / abs( direction.y );\\n\\t\\t} else if ( face == 2.0 ) {\\n\\t\\t\\tuv = vec2( - direction.x, direction.y ) / abs( direction.z );\\n\\t\\t} else if ( face == 3.0 ) {\\n\\t\\t\\tuv = vec2( - direction.z, direction.y ) / abs( direction.x );\\n\\t\\t} else if ( face == 4.0 ) {\\n\\t\\t\\tuv = vec2( - direction.x, direction.z ) / abs( direction.y );\\n\\t\\t} else {\\n\\t\\t\\tuv = vec2( direction.x, direction.y ) / abs( direction.z );\\n\\t\\t}\\n\\t\\treturn 0.5 * ( uv + 1.0 );\\n\\t}\\n\\tvec3 bilinearCubeUV( sampler2D envMap, vec3 direction, float mipInt ) {\\n\\t\\tfloat face = getFace( direction );\\n\\t\\tfloat filterInt = max( cubeUV_minMipLevel - mipInt, 0.0 );\\n\\t\\tmipInt = max( mipInt, cubeUV_minMipLevel );\\n\\t\\tfloat faceSize = exp2( mipInt );\\n\\t\\tfloat texelSize = 1.0 / ( 3.0 * cubeUV_maxTileSize );\\n\\t\\tvec2 uv = getUV( direction, face ) * ( faceSize - 1.0 );\\n\\t\\tvec2 f = fract( uv );\\n\\t\\tuv += 0.5 - f;\\n\\t\\tif ( face > 2.0 ) {\\n\\t\\t\\tuv.y += faceSize;\\n\\t\\t\\tface -= 3.0;\\n\\t\\t}\\n\\t\\tuv.x += face * faceSize;\\n\\t\\tif ( mipInt < cubeUV_maxMipLevel ) {\\n\\t\\t\\tuv.y += 2.0 * cubeUV_maxTileSize;\\n\\t\\t}\\n\\t\\tuv.y += filterInt * 2.0 * cubeUV_minTileSize;\\n\\t\\tuv.x += 3.0 * max( 0.0, cubeUV_maxTileSize - 2.0 * faceSize );\\n\\t\\tuv *= texelSize;\\n\\t\\tvec3 tl = envMapTexelToLinear( texture2D( envMap, uv ) ).rgb;\\n\\t\\tuv.x += texelSize;\\n\\t\\tvec3 tr = envMapTexelToLinear( texture2D( envMap, uv ) ).rgb;\\n\\t\\tuv.y += texelSize;\\n\\t\\tvec3 br = envMapTexelToLinear( texture2D( envMap, uv ) ).rgb;\\n\\t\\tuv.x -= texelSize;\\n\\t\\tvec3 bl = envMapTexelToLinear( texture2D( envMap, uv ) ).rgb;\\n\\t\\tvec3 tm = mix( tl, tr, f.x );\\n\\t\\tvec3 bm = mix( bl, br, f.x );\\n\\t\\treturn mix( tm, bm, f.y );\\n\\t}\\n\\t#define r0 1.0\\n\\t#define v0 0.339\\n\\t#define m0 - 2.0\\n\\t#define r1 0.8\\n\\t#define v1 0.276\\n\\t#define m1 - 1.0\\n\\t#define r4 0.4\\n\\t#define v4 0.046\\n\\t#define m4 2.0\\n\\t#define r5 0.305\\n\\t#define v5 0.016\\n\\t#define m5 3.0\\n\\t#define r6 0.21\\n\\t#define v6 0.0038\\n\\t#define m6 4.0\\n\\tfloat roughnessToMip( float roughness ) {\\n\\t\\tfloat mip = 0.0;\\n\\t\\tif ( roughness >= r1 ) {\\n\\t\\t\\tmip = ( r0 - roughness ) * ( m1 - m0 ) / ( r0 - r1 ) + m0;\\n\\t\\t} else if ( roughness >= r4 ) {\\n\\t\\t\\tmip = ( r1 - roughness ) * ( m4 - m1 ) / ( r1 - r4 ) + m1;\\n\\t\\t} else if ( roughness >= r5 ) {\\n\\t\\t\\tmip = ( r4 - roughness ) * ( m5 - m4 ) / ( r4 - r5 ) + m4;\\n\\t\\t} else if ( roughness >= r6 ) {\\n\\t\\t\\tmip = ( r5 - roughness ) * ( m6 - m5 ) / ( r5 - r6 ) + m5;\\n\\t\\t} else {\\n\\t\\t\\tmip = - 2.0 * log2( 1.16 * roughness );\\t\\t}\\n\\t\\treturn mip;\\n\\t}\\n\\tvec4 textureCubeUV( sampler2D envMap, vec3 sampleDir, float roughness ) {\\n\\t\\tfloat mip = clamp( roughnessToMip( roughness ), m0, cubeUV_maxMipLevel );\\n\\t\\tfloat mipF = fract( mip );\\n\\t\\tfloat mipInt = floor( mip );\\n\\t\\tvec3 color0 = bilinearCubeUV( envMap, sampleDir, mipInt );\\n\\t\\tif ( mipF == 0.0 ) {\\n\\t\\t\\treturn vec4( color0, 1.0 );\\n\\t\\t} else {\\n\\t\\t\\tvec3 color1 = bilinearCubeUV( envMap, sampleDir, mipInt + 1.0 );\\n\\t\\t\\treturn vec4( mix( color0, color1, mipF ), 1.0 );\\n\\t\\t}\\n\\t}\\n#endif\";\n\nvar defaultnormal_vertex = \"vec3 transformedNormal = objectNormal;\\n#ifdef USE_INSTANCING\\n\\tmat3 m = mat3( instanceMatrix );\\n\\ttransformedNormal /= vec3( dot( m[ 0 ], m[ 0 ] ), dot( m[ 1 ], m[ 1 ] ), dot( m[ 2 ], m[ 2 ] ) );\\n\\ttransformedNormal = m * transformedNormal;\\n#endif\\ntransformedNormal = normalMatrix * transformedNormal;\\n#ifdef FLIP_SIDED\\n\\ttransformedNormal = - transformedNormal;\\n#endif\\n#ifdef USE_TANGENT\\n\\tvec3 transformedTangent = ( modelViewMatrix * vec4( objectTangent, 0.0 ) ).xyz;\\n\\t#ifdef FLIP_SIDED\\n\\t\\ttransformedTangent = - transformedTangent;\\n\\t#endif\\n#endif\";\n\nvar displacementmap_pars_vertex = \"#ifdef USE_DISPLACEMENTMAP\\n\\tuniform sampler2D displacementMap;\\n\\tuniform float displacementScale;\\n\\tuniform float displacementBias;\\n#endif\";\n\nvar displacementmap_vertex = \"#ifdef USE_DISPLACEMENTMAP\\n\\ttransformed += normalize( objectNormal ) * ( texture2D( displacementMap, vUv ).x * displacementScale + displacementBias );\\n#endif\";\n\nvar emissivemap_fragment = \"#ifdef USE_EMISSIVEMAP\\n\\tvec4 emissiveColor = texture2D( emissiveMap, vUv );\\n\\temissiveColor.rgb = emissiveMapTexelToLinear( emissiveColor ).rgb;\\n\\ttotalEmissiveRadiance *= emissiveColor.rgb;\\n#endif\";\n\nvar emissivemap_pars_fragment = \"#ifdef USE_EMISSIVEMAP\\n\\tuniform sampler2D emissiveMap;\\n#endif\";\n\nvar encodings_fragment = \"gl_FragColor = linearToOutputTexel( gl_FragColor );\";\n\nvar encodings_pars_fragment = \"\\nvec4 LinearToLinear( in vec4 value ) {\\n\\treturn value;\\n}\\nvec4 GammaToLinear( in vec4 value, in float gammaFactor ) {\\n\\treturn vec4( pow( value.rgb, vec3( gammaFactor ) ), value.a );\\n}\\nvec4 LinearToGamma( in vec4 value, in float gammaFactor ) {\\n\\treturn vec4( pow( value.rgb, vec3( 1.0 / gammaFactor ) ), value.a );\\n}\\nvec4 sRGBToLinear( in vec4 value ) {\\n\\treturn vec4( mix( pow( value.rgb * 0.9478672986 + vec3( 0.0521327014 ), vec3( 2.4 ) ), value.rgb * 0.0773993808, vec3( lessThanEqual( value.rgb, vec3( 0.04045 ) ) ) ), value.a );\\n}\\nvec4 LinearTosRGB( in vec4 value ) {\\n\\treturn vec4( mix( pow( value.rgb, vec3( 0.41666 ) ) * 1.055 - vec3( 0.055 ), value.rgb * 12.92, vec3( lessThanEqual( value.rgb, vec3( 0.0031308 ) ) ) ), value.a );\\n}\\nvec4 RGBEToLinear( in vec4 value ) {\\n\\treturn vec4( value.rgb * exp2( value.a * 255.0 - 128.0 ), 1.0 );\\n}\\nvec4 LinearToRGBE( in vec4 value ) {\\n\\tfloat maxComponent = max( max( value.r, value.g ), value.b );\\n\\tfloat fExp = clamp( ceil( log2( maxComponent ) ), -128.0, 127.0 );\\n\\treturn vec4( value.rgb / exp2( fExp ), ( fExp + 128.0 ) / 255.0 );\\n}\\nvec4 RGBMToLinear( in vec4 value, in float maxRange ) {\\n\\treturn vec4( value.rgb * value.a * maxRange, 1.0 );\\n}\\nvec4 LinearToRGBM( in vec4 value, in float maxRange ) {\\n\\tfloat maxRGB = max( value.r, max( value.g, value.b ) );\\n\\tfloat M = clamp( maxRGB / maxRange, 0.0, 1.0 );\\n\\tM = ceil( M * 255.0 ) / 255.0;\\n\\treturn vec4( value.rgb / ( M * maxRange ), M );\\n}\\nvec4 RGBDToLinear( in vec4 value, in float maxRange ) {\\n\\treturn vec4( value.rgb * ( ( maxRange / 255.0 ) / value.a ), 1.0 );\\n}\\nvec4 LinearToRGBD( in vec4 value, in float maxRange ) {\\n\\tfloat maxRGB = max( value.r, max( value.g, value.b ) );\\n\\tfloat D = max( maxRange / maxRGB, 1.0 );\\n\\tD = clamp( floor( D ) / 255.0, 0.0, 1.0 );\\n\\treturn vec4( value.rgb * ( D * ( 255.0 / maxRange ) ), D );\\n}\\nconst mat3 cLogLuvM = mat3( 0.2209, 0.3390, 0.4184, 0.1138, 0.6780, 0.7319, 0.0102, 0.1130, 0.2969 );\\nvec4 LinearToLogLuv( in vec4 value ) {\\n\\tvec3 Xp_Y_XYZp = cLogLuvM * value.rgb;\\n\\tXp_Y_XYZp = max( Xp_Y_XYZp, vec3( 1e-6, 1e-6, 1e-6 ) );\\n\\tvec4 vResult;\\n\\tvResult.xy = Xp_Y_XYZp.xy / Xp_Y_XYZp.z;\\n\\tfloat Le = 2.0 * log2(Xp_Y_XYZp.y) + 127.0;\\n\\tvResult.w = fract( Le );\\n\\tvResult.z = ( Le - ( floor( vResult.w * 255.0 ) ) / 255.0 ) / 255.0;\\n\\treturn vResult;\\n}\\nconst mat3 cLogLuvInverseM = mat3( 6.0014, -2.7008, -1.7996, -1.3320, 3.1029, -5.7721, 0.3008, -1.0882, 5.6268 );\\nvec4 LogLuvToLinear( in vec4 value ) {\\n\\tfloat Le = value.z * 255.0 + value.w;\\n\\tvec3 Xp_Y_XYZp;\\n\\tXp_Y_XYZp.y = exp2( ( Le - 127.0 ) / 2.0 );\\n\\tXp_Y_XYZp.z = Xp_Y_XYZp.y / value.y;\\n\\tXp_Y_XYZp.x = value.x * Xp_Y_XYZp.z;\\n\\tvec3 vRGB = cLogLuvInverseM * Xp_Y_XYZp.rgb;\\n\\treturn vec4( max( vRGB, 0.0 ), 1.0 );\\n}\";\n\nvar envmap_fragment = \"#ifdef USE_ENVMAP\\n\\t#ifdef ENV_WORLDPOS\\n\\t\\tvec3 cameraToFrag;\\n\\t\\tif ( isOrthographic ) {\\n\\t\\t\\tcameraToFrag = normalize( vec3( - viewMatrix[ 0 ][ 2 ], - viewMatrix[ 1 ][ 2 ], - viewMatrix[ 2 ][ 2 ] ) );\\n\\t\\t} else {\\n\\t\\t\\tcameraToFrag = normalize( vWorldPosition - cameraPosition );\\n\\t\\t}\\n\\t\\tvec3 worldNormal = inverseTransformDirection( normal, viewMatrix );\\n\\t\\t#ifdef ENVMAP_MODE_REFLECTION\\n\\t\\t\\tvec3 reflectVec = reflect( cameraToFrag, worldNormal );\\n\\t\\t#else\\n\\t\\t\\tvec3 reflectVec = refract( cameraToFrag, worldNormal, refractionRatio );\\n\\t\\t#endif\\n\\t#else\\n\\t\\tvec3 reflectVec = vReflect;\\n\\t#endif\\n\\t#ifdef ENVMAP_TYPE_CUBE\\n\\t\\tvec4 envColor = textureCube( envMap, vec3( flipEnvMap * reflectVec.x, reflectVec.yz ) );\\n\\t#elif defined( ENVMAP_TYPE_CUBE_UV )\\n\\t\\tvec4 envColor = textureCubeUV( envMap, reflectVec, 0.0 );\\n\\t#else\\n\\t\\tvec4 envColor = vec4( 0.0 );\\n\\t#endif\\n\\t#ifndef ENVMAP_TYPE_CUBE_UV\\n\\t\\tenvColor = envMapTexelToLinear( envColor );\\n\\t#endif\\n\\t#ifdef ENVMAP_BLENDING_MULTIPLY\\n\\t\\toutgoingLight = mix( outgoingLight, outgoingLight * envColor.xyz, specularStrength * reflectivity );\\n\\t#elif defined( ENVMAP_BLENDING_MIX )\\n\\t\\toutgoingLight = mix( outgoingLight, envColor.xyz, specularStrength * reflectivity );\\n\\t#elif defined( ENVMAP_BLENDING_ADD )\\n\\t\\toutgoingLight += envColor.xyz * specularStrength * reflectivity;\\n\\t#endif\\n#endif\";\n\nvar envmap_common_pars_fragment = \"#ifdef USE_ENVMAP\\n\\tuniform float envMapIntensity;\\n\\tuniform float flipEnvMap;\\n\\tuniform int maxMipLevel;\\n\\t#ifdef ENVMAP_TYPE_CUBE\\n\\t\\tuniform samplerCube envMap;\\n\\t#else\\n\\t\\tuniform sampler2D envMap;\\n\\t#endif\\n\\t\\n#endif\";\n\nvar envmap_pars_fragment = \"#ifdef USE_ENVMAP\\n\\tuniform float reflectivity;\\n\\t#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( PHONG )\\n\\t\\t#define ENV_WORLDPOS\\n\\t#endif\\n\\t#ifdef ENV_WORLDPOS\\n\\t\\tvarying vec3 vWorldPosition;\\n\\t\\tuniform float refractionRatio;\\n\\t#else\\n\\t\\tvarying vec3 vReflect;\\n\\t#endif\\n#endif\";\n\nvar envmap_pars_vertex = \"#ifdef USE_ENVMAP\\n\\t#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) ||defined( PHONG )\\n\\t\\t#define ENV_WORLDPOS\\n\\t#endif\\n\\t#ifdef ENV_WORLDPOS\\n\\t\\t\\n\\t\\tvarying vec3 vWorldPosition;\\n\\t#else\\n\\t\\tvarying vec3 vReflect;\\n\\t\\tuniform float refractionRatio;\\n\\t#endif\\n#endif\";\n\nvar envmap_vertex = \"#ifdef USE_ENVMAP\\n\\t#ifdef ENV_WORLDPOS\\n\\t\\tvWorldPosition = worldPosition.xyz;\\n\\t#else\\n\\t\\tvec3 cameraToVertex;\\n\\t\\tif ( isOrthographic ) {\\n\\t\\t\\tcameraToVertex = normalize( vec3( - viewMatrix[ 0 ][ 2 ], - viewMatrix[ 1 ][ 2 ], - viewMatrix[ 2 ][ 2 ] ) );\\n\\t\\t} else {\\n\\t\\t\\tcameraToVertex = normalize( worldPosition.xyz - cameraPosition );\\n\\t\\t}\\n\\t\\tvec3 worldNormal = inverseTransformDirection( transformedNormal, viewMatrix );\\n\\t\\t#ifdef ENVMAP_MODE_REFLECTION\\n\\t\\t\\tvReflect = reflect( cameraToVertex, worldNormal );\\n\\t\\t#else\\n\\t\\t\\tvReflect = refract( cameraToVertex, worldNormal, refractionRatio );\\n\\t\\t#endif\\n\\t#endif\\n#endif\";\n\nvar fog_vertex = \"#ifdef USE_FOG\\n\\tfogDepth = - mvPosition.z;\\n#endif\";\n\nvar fog_pars_vertex = \"#ifdef USE_FOG\\n\\tvarying float fogDepth;\\n#endif\";\n\nvar fog_fragment = \"#ifdef USE_FOG\\n\\t#ifdef FOG_EXP2\\n\\t\\tfloat fogFactor = 1.0 - exp( - fogDensity * fogDensity * fogDepth * fogDepth );\\n\\t#else\\n\\t\\tfloat fogFactor = smoothstep( fogNear, fogFar, fogDepth );\\n\\t#endif\\n\\tgl_FragColor.rgb = mix( gl_FragColor.rgb, fogColor, fogFactor );\\n#endif\";\n\nvar fog_pars_fragment = \"#ifdef USE_FOG\\n\\tuniform vec3 fogColor;\\n\\tvarying float fogDepth;\\n\\t#ifdef FOG_EXP2\\n\\t\\tuniform float fogDensity;\\n\\t#else\\n\\t\\tuniform float fogNear;\\n\\t\\tuniform float fogFar;\\n\\t#endif\\n#endif\";\n\nvar gradientmap_pars_fragment = \"#ifdef USE_GRADIENTMAP\\n\\tuniform sampler2D gradientMap;\\n#endif\\nvec3 getGradientIrradiance( vec3 normal, vec3 lightDirection ) {\\n\\tfloat dotNL = dot( normal, lightDirection );\\n\\tvec2 coord = vec2( dotNL * 0.5 + 0.5, 0.0 );\\n\\t#ifdef USE_GRADIENTMAP\\n\\t\\treturn texture2D( gradientMap, coord ).rgb;\\n\\t#else\\n\\t\\treturn ( coord.x < 0.7 ) ? vec3( 0.7 ) : vec3( 1.0 );\\n\\t#endif\\n}\";\n\nvar lightmap_fragment = \"#ifdef USE_LIGHTMAP\\n\\tvec4 lightMapTexel= texture2D( lightMap, vUv2 );\\n\\treflectedLight.indirectDiffuse += PI * lightMapTexelToLinear( lightMapTexel ).rgb * lightMapIntensity;\\n#endif\";\n\nvar lightmap_pars_fragment = \"#ifdef USE_LIGHTMAP\\n\\tuniform sampler2D lightMap;\\n\\tuniform float lightMapIntensity;\\n#endif\";\n\nvar lights_lambert_vertex = \"vec3 diffuse = vec3( 1.0 );\\nGeometricContext geometry;\\ngeometry.position = mvPosition.xyz;\\ngeometry.normal = normalize( transformedNormal );\\ngeometry.viewDir = ( isOrthographic ) ? vec3( 0, 0, 1 ) : normalize( -mvPosition.xyz );\\nGeometricContext backGeometry;\\nbackGeometry.position = geometry.position;\\nbackGeometry.normal = -geometry.normal;\\nbackGeometry.viewDir = geometry.viewDir;\\nvLightFront = vec3( 0.0 );\\nvIndirectFront = vec3( 0.0 );\\n#ifdef DOUBLE_SIDED\\n\\tvLightBack = vec3( 0.0 );\\n\\tvIndirectBack = vec3( 0.0 );\\n#endif\\nIncidentLight directLight;\\nfloat dotNL;\\nvec3 directLightColor_Diffuse;\\nvIndirectFront += getAmbientLightIrradiance( ambientLightColor );\\nvIndirectFront += getLightProbeIrradiance( lightProbe, geometry );\\n#ifdef DOUBLE_SIDED\\n\\tvIndirectBack += getAmbientLightIrradiance( ambientLightColor );\\n\\tvIndirectBack += getLightProbeIrradiance( lightProbe, backGeometry );\\n#endif\\n#if NUM_POINT_LIGHTS > 0\\n\\t#pragma unroll_loop_start\\n\\tfor ( int i = 0; i < NUM_POINT_LIGHTS; i ++ ) {\\n\\t\\tgetPointDirectLightIrradiance( pointLights[ i ], geometry, directLight );\\n\\t\\tdotNL = dot( geometry.normal, directLight.direction );\\n\\t\\tdirectLightColor_Diffuse = PI * directLight.color;\\n\\t\\tvLightFront += saturate( dotNL ) * directLightColor_Diffuse;\\n\\t\\t#ifdef DOUBLE_SIDED\\n\\t\\t\\tvLightBack += saturate( -dotNL ) * directLightColor_Diffuse;\\n\\t\\t#endif\\n\\t}\\n\\t#pragma unroll_loop_end\\n#endif\\n#if NUM_SPOT_LIGHTS > 0\\n\\t#pragma unroll_loop_start\\n\\tfor ( int i = 0; i < NUM_SPOT_LIGHTS; i ++ ) {\\n\\t\\tgetSpotDirectLightIrradiance( spotLights[ i ], geometry, directLight );\\n\\t\\tdotNL = dot( geometry.normal, directLight.direction );\\n\\t\\tdirectLightColor_Diffuse = PI * directLight.color;\\n\\t\\tvLightFront += saturate( dotNL ) * directLightColor_Diffuse;\\n\\t\\t#ifdef DOUBLE_SIDED\\n\\t\\t\\tvLightBack += saturate( -dotNL ) * directLightColor_Diffuse;\\n\\t\\t#endif\\n\\t}\\n\\t#pragma unroll_loop_end\\n#endif\\n#if NUM_DIR_LIGHTS > 0\\n\\t#pragma unroll_loop_start\\n\\tfor ( int i = 0; i < NUM_DIR_LIGHTS; i ++ ) {\\n\\t\\tgetDirectionalDirectLightIrradiance( directionalLights[ i ], geometry, directLight );\\n\\t\\tdotNL = dot( geometry.normal, directLight.direction );\\n\\t\\tdirectLightColor_Diffuse = PI * directLight.color;\\n\\t\\tvLightFront += saturate( dotNL ) * directLightColor_Diffuse;\\n\\t\\t#ifdef DOUBLE_SIDED\\n\\t\\t\\tvLightBack += saturate( -dotNL ) * directLightColor_Diffuse;\\n\\t\\t#endif\\n\\t}\\n\\t#pragma unroll_loop_end\\n#endif\\n#if NUM_HEMI_LIGHTS > 0\\n\\t#pragma unroll_loop_start\\n\\tfor ( int i = 0; i < NUM_HEMI_LIGHTS; i ++ ) {\\n\\t\\tvIndirectFront += getHemisphereLightIrradiance( hemisphereLights[ i ], geometry );\\n\\t\\t#ifdef DOUBLE_SIDED\\n\\t\\t\\tvIndirectBack += getHemisphereLightIrradiance( hemisphereLights[ i ], backGeometry );\\n\\t\\t#endif\\n\\t}\\n\\t#pragma unroll_loop_end\\n#endif\";\n\nvar lights_pars_begin = \"uniform bool receiveShadow;\\nuniform vec3 ambientLightColor;\\nuniform vec3 lightProbe[ 9 ];\\nvec3 shGetIrradianceAt( in vec3 normal, in vec3 shCoefficients[ 9 ] ) {\\n\\tfloat x = normal.x, y = normal.y, z = normal.z;\\n\\tvec3 result = shCoefficients[ 0 ] * 0.886227;\\n\\tresult += shCoefficients[ 1 ] * 2.0 * 0.511664 * y;\\n\\tresult += shCoefficients[ 2 ] * 2.0 * 0.511664 * z;\\n\\tresult += shCoefficients[ 3 ] * 2.0 * 0.511664 * x;\\n\\tresult += shCoefficients[ 4 ] * 2.0 * 0.429043 * x * y;\\n\\tresult += shCoefficients[ 5 ] * 2.0 * 0.429043 * y * z;\\n\\tresult += shCoefficients[ 6 ] * ( 0.743125 * z * z - 0.247708 );\\n\\tresult += shCoefficients[ 7 ] * 2.0 * 0.429043 * x * z;\\n\\tresult += shCoefficients[ 8 ] * 0.429043 * ( x * x - y * y );\\n\\treturn result;\\n}\\nvec3 getLightProbeIrradiance( const in vec3 lightProbe[ 9 ], const in GeometricContext geometry ) {\\n\\tvec3 worldNormal = inverseTransformDirection( geometry.normal, viewMatrix );\\n\\tvec3 irradiance = shGetIrradianceAt( worldNormal, lightProbe );\\n\\treturn irradiance;\\n}\\nvec3 getAmbientLightIrradiance( const in vec3 ambientLightColor ) {\\n\\tvec3 irradiance = ambientLightColor;\\n\\t#ifndef PHYSICALLY_CORRECT_LIGHTS\\n\\t\\tirradiance *= PI;\\n\\t#endif\\n\\treturn irradiance;\\n}\\n#if NUM_DIR_LIGHTS > 0\\n\\tstruct DirectionalLight {\\n\\t\\tvec3 direction;\\n\\t\\tvec3 color;\\n\\t};\\n\\tuniform DirectionalLight directionalLights[ NUM_DIR_LIGHTS ];\\n\\tvoid getDirectionalDirectLightIrradiance( const in DirectionalLight directionalLight, const in GeometricContext geometry, out IncidentLight directLight ) {\\n\\t\\tdirectLight.color = directionalLight.color;\\n\\t\\tdirectLight.direction = directionalLight.direction;\\n\\t\\tdirectLight.visible = true;\\n\\t}\\n#endif\\n#if NUM_POINT_LIGHTS > 0\\n\\tstruct PointLight {\\n\\t\\tvec3 position;\\n\\t\\tvec3 color;\\n\\t\\tfloat distance;\\n\\t\\tfloat decay;\\n\\t};\\n\\tuniform PointLight pointLights[ NUM_POINT_LIGHTS ];\\n\\tvoid getPointDirectLightIrradiance( const in PointLight pointLight, const in GeometricContext geometry, out IncidentLight directLight ) {\\n\\t\\tvec3 lVector = pointLight.position - geometry.position;\\n\\t\\tdirectLight.direction = normalize( lVector );\\n\\t\\tfloat lightDistance = length( lVector );\\n\\t\\tdirectLight.color = pointLight.color;\\n\\t\\tdirectLight.color *= punctualLightIntensityToIrradianceFactor( lightDistance, pointLight.distance, pointLight.decay );\\n\\t\\tdirectLight.visible = ( directLight.color != vec3( 0.0 ) );\\n\\t}\\n#endif\\n#if NUM_SPOT_LIGHTS > 0\\n\\tstruct SpotLight {\\n\\t\\tvec3 position;\\n\\t\\tvec3 direction;\\n\\t\\tvec3 color;\\n\\t\\tfloat distance;\\n\\t\\tfloat decay;\\n\\t\\tfloat coneCos;\\n\\t\\tfloat penumbraCos;\\n\\t};\\n\\tuniform SpotLight spotLights[ NUM_SPOT_LIGHTS ];\\n\\tvoid getSpotDirectLightIrradiance( const in SpotLight spotLight, const in GeometricContext geometry, out IncidentLight directLight ) {\\n\\t\\tvec3 lVector = spotLight.position - geometry.position;\\n\\t\\tdirectLight.direction = normalize( lVector );\\n\\t\\tfloat lightDistance = length( lVector );\\n\\t\\tfloat angleCos = dot( directLight.direction, spotLight.direction );\\n\\t\\tif ( angleCos > spotLight.coneCos ) {\\n\\t\\t\\tfloat spotEffect = smoothstep( spotLight.coneCos, spotLight.penumbraCos, angleCos );\\n\\t\\t\\tdirectLight.color = spotLight.color;\\n\\t\\t\\tdirectLight.color *= spotEffect * punctualLightIntensityToIrradianceFactor( lightDistance, spotLight.distance, spotLight.decay );\\n\\t\\t\\tdirectLight.visible = true;\\n\\t\\t} else {\\n\\t\\t\\tdirectLight.color = vec3( 0.0 );\\n\\t\\t\\tdirectLight.visible = false;\\n\\t\\t}\\n\\t}\\n#endif\\n#if NUM_RECT_AREA_LIGHTS > 0\\n\\tstruct RectAreaLight {\\n\\t\\tvec3 color;\\n\\t\\tvec3 position;\\n\\t\\tvec3 halfWidth;\\n\\t\\tvec3 halfHeight;\\n\\t};\\n\\tuniform sampler2D ltc_1;\\tuniform sampler2D ltc_2;\\n\\tuniform RectAreaLight rectAreaLights[ NUM_RECT_AREA_LIGHTS ];\\n#endif\\n#if NUM_HEMI_LIGHTS > 0\\n\\tstruct HemisphereLight {\\n\\t\\tvec3 direction;\\n\\t\\tvec3 skyColor;\\n\\t\\tvec3 groundColor;\\n\\t};\\n\\tuniform HemisphereLight hemisphereLights[ NUM_HEMI_LIGHTS ];\\n\\tvec3 getHemisphereLightIrradiance( const in HemisphereLight hemiLight, const in GeometricContext geometry ) {\\n\\t\\tfloat dotNL = dot( geometry.normal, hemiLight.direction );\\n\\t\\tfloat hemiDiffuseWeight = 0.5 * dotNL + 0.5;\\n\\t\\tvec3 irradiance = mix( hemiLight.groundColor, hemiLight.skyColor, hemiDiffuseWeight );\\n\\t\\t#ifndef PHYSICALLY_CORRECT_LIGHTS\\n\\t\\t\\tirradiance *= PI;\\n\\t\\t#endif\\n\\t\\treturn irradiance;\\n\\t}\\n#endif\";\n\nvar envmap_physical_pars_fragment = \"#if defined( USE_ENVMAP )\\n\\t#ifdef ENVMAP_MODE_REFRACTION\\n\\t\\tuniform float refractionRatio;\\n\\t#endif\\n\\tvec3 getLightProbeIndirectIrradiance( const in GeometricContext geometry, const in int maxMIPLevel ) {\\n\\t\\tvec3 worldNormal = inverseTransformDirection( geometry.normal, viewMatrix );\\n\\t\\t#ifdef ENVMAP_TYPE_CUBE\\n\\t\\t\\tvec3 queryVec = vec3( flipEnvMap * worldNormal.x, worldNormal.yz );\\n\\t\\t\\t#ifdef TEXTURE_LOD_EXT\\n\\t\\t\\t\\tvec4 envMapColor = textureCubeLodEXT( envMap, queryVec, float( maxMIPLevel ) );\\n\\t\\t\\t#else\\n\\t\\t\\t\\tvec4 envMapColor = textureCube( envMap, queryVec, float( maxMIPLevel ) );\\n\\t\\t\\t#endif\\n\\t\\t\\tenvMapColor.rgb = envMapTexelToLinear( envMapColor ).rgb;\\n\\t\\t#elif defined( ENVMAP_TYPE_CUBE_UV )\\n\\t\\t\\tvec4 envMapColor = textureCubeUV( envMap, worldNormal, 1.0 );\\n\\t\\t#else\\n\\t\\t\\tvec4 envMapColor = vec4( 0.0 );\\n\\t\\t#endif\\n\\t\\treturn PI * envMapColor.rgb * envMapIntensity;\\n\\t}\\n\\tfloat getSpecularMIPLevel( const in float roughness, const in int maxMIPLevel ) {\\n\\t\\tfloat maxMIPLevelScalar = float( maxMIPLevel );\\n\\t\\tfloat sigma = PI * roughness * roughness / ( 1.0 + roughness );\\n\\t\\tfloat desiredMIPLevel = maxMIPLevelScalar + log2( sigma );\\n\\t\\treturn clamp( desiredMIPLevel, 0.0, maxMIPLevelScalar );\\n\\t}\\n\\tvec3 getLightProbeIndirectRadiance( const in vec3 viewDir, const in vec3 normal, const in float roughness, const in int maxMIPLevel ) {\\n\\t\\t#ifdef ENVMAP_MODE_REFLECTION\\n\\t\\t\\tvec3 reflectVec = reflect( -viewDir, normal );\\n\\t\\t\\treflectVec = normalize( mix( reflectVec, normal, roughness * roughness) );\\n\\t\\t#else\\n\\t\\t\\tvec3 reflectVec = refract( -viewDir, normal, refractionRatio );\\n\\t\\t#endif\\n\\t\\treflectVec = inverseTransformDirection( reflectVec, viewMatrix );\\n\\t\\tfloat specularMIPLevel = getSpecularMIPLevel( roughness, maxMIPLevel );\\n\\t\\t#ifdef ENVMAP_TYPE_CUBE\\n\\t\\t\\tvec3 queryReflectVec = vec3( flipEnvMap * reflectVec.x, reflectVec.yz );\\n\\t\\t\\t#ifdef TEXTURE_LOD_EXT\\n\\t\\t\\t\\tvec4 envMapColor = textureCubeLodEXT( envMap, queryReflectVec, specularMIPLevel );\\n\\t\\t\\t#else\\n\\t\\t\\t\\tvec4 envMapColor = textureCube( envMap, queryReflectVec, specularMIPLevel );\\n\\t\\t\\t#endif\\n\\t\\t\\tenvMapColor.rgb = envMapTexelToLinear( envMapColor ).rgb;\\n\\t\\t#elif defined( ENVMAP_TYPE_CUBE_UV )\\n\\t\\t\\tvec4 envMapColor = textureCubeUV( envMap, reflectVec, roughness );\\n\\t\\t#endif\\n\\t\\treturn envMapColor.rgb * envMapIntensity;\\n\\t}\\n#endif\";\n\nvar lights_toon_fragment = \"ToonMaterial material;\\nmaterial.diffuseColor = diffuseColor.rgb;\";\n\nvar lights_toon_pars_fragment = \"varying vec3 vViewPosition;\\n#ifndef FLAT_SHADED\\n\\tvarying vec3 vNormal;\\n#endif\\nstruct ToonMaterial {\\n\\tvec3 diffuseColor;\\n};\\nvoid RE_Direct_Toon( const in IncidentLight directLight, const in GeometricContext geometry, const in ToonMaterial material, inout ReflectedLight reflectedLight ) {\\n\\tvec3 irradiance = getGradientIrradiance( geometry.normal, directLight.direction ) * directLight.color;\\n\\t#ifndef PHYSICALLY_CORRECT_LIGHTS\\n\\t\\tirradiance *= PI;\\n\\t#endif\\n\\treflectedLight.directDiffuse += irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\\n}\\nvoid RE_IndirectDiffuse_Toon( const in vec3 irradiance, const in GeometricContext geometry, const in ToonMaterial material, inout ReflectedLight reflectedLight ) {\\n\\treflectedLight.indirectDiffuse += irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\\n}\\n#define RE_Direct\\t\\t\\t\\tRE_Direct_Toon\\n#define RE_IndirectDiffuse\\t\\tRE_IndirectDiffuse_Toon\\n#define Material_LightProbeLOD( material )\\t(0)\";\n\nvar lights_phong_fragment = \"BlinnPhongMaterial material;\\nmaterial.diffuseColor = diffuseColor.rgb;\\nmaterial.specularColor = specular;\\nmaterial.specularShininess = shininess;\\nmaterial.specularStrength = specularStrength;\";\n\nvar lights_phong_pars_fragment = \"varying vec3 vViewPosition;\\n#ifndef FLAT_SHADED\\n\\tvarying vec3 vNormal;\\n#endif\\nstruct BlinnPhongMaterial {\\n\\tvec3 diffuseColor;\\n\\tvec3 specularColor;\\n\\tfloat specularShininess;\\n\\tfloat specularStrength;\\n};\\nvoid RE_Direct_BlinnPhong( const in IncidentLight directLight, const in GeometricContext geometry, const in BlinnPhongMaterial material, inout ReflectedLight reflectedLight ) {\\n\\tfloat dotNL = saturate( dot( geometry.normal, directLight.direction ) );\\n\\tvec3 irradiance = dotNL * directLight.color;\\n\\t#ifndef PHYSICALLY_CORRECT_LIGHTS\\n\\t\\tirradiance *= PI;\\n\\t#endif\\n\\treflectedLight.directDiffuse += irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\\n\\treflectedLight.directSpecular += irradiance * BRDF_Specular_BlinnPhong( directLight, geometry, material.specularColor, material.specularShininess ) * material.specularStrength;\\n}\\nvoid RE_IndirectDiffuse_BlinnPhong( const in vec3 irradiance, const in GeometricContext geometry, const in BlinnPhongMaterial material, inout ReflectedLight reflectedLight ) {\\n\\treflectedLight.indirectDiffuse += irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\\n}\\n#define RE_Direct\\t\\t\\t\\tRE_Direct_BlinnPhong\\n#define RE_IndirectDiffuse\\t\\tRE_IndirectDiffuse_BlinnPhong\\n#define Material_LightProbeLOD( material )\\t(0)\";\n\nvar lights_physical_fragment = \"PhysicalMaterial material;\\nmaterial.diffuseColor = diffuseColor.rgb * ( 1.0 - metalnessFactor );\\nvec3 dxy = max( abs( dFdx( geometryNormal ) ), abs( dFdy( geometryNormal ) ) );\\nfloat geometryRoughness = max( max( dxy.x, dxy.y ), dxy.z );\\nmaterial.specularRoughness = max( roughnessFactor, 0.0525 );material.specularRoughness += geometryRoughness;\\nmaterial.specularRoughness = min( material.specularRoughness, 1.0 );\\n#ifdef REFLECTIVITY\\n\\tmaterial.specularColor = mix( vec3( MAXIMUM_SPECULAR_COEFFICIENT * pow2( reflectivity ) ), diffuseColor.rgb, metalnessFactor );\\n#else\\n\\tmaterial.specularColor = mix( vec3( DEFAULT_SPECULAR_COEFFICIENT ), diffuseColor.rgb, metalnessFactor );\\n#endif\\n#ifdef CLEARCOAT\\n\\tmaterial.clearcoat = clearcoat;\\n\\tmaterial.clearcoatRoughness = clearcoatRoughness;\\n\\t#ifdef USE_CLEARCOATMAP\\n\\t\\tmaterial.clearcoat *= texture2D( clearcoatMap, vUv ).x;\\n\\t#endif\\n\\t#ifdef USE_CLEARCOAT_ROUGHNESSMAP\\n\\t\\tmaterial.clearcoatRoughness *= texture2D( clearcoatRoughnessMap, vUv ).y;\\n\\t#endif\\n\\tmaterial.clearcoat = saturate( material.clearcoat );\\tmaterial.clearcoatRoughness = max( material.clearcoatRoughness, 0.0525 );\\n\\tmaterial.clearcoatRoughness += geometryRoughness;\\n\\tmaterial.clearcoatRoughness = min( material.clearcoatRoughness, 1.0 );\\n#endif\\n#ifdef USE_SHEEN\\n\\tmaterial.sheenColor = sheen;\\n#endif\";\n\nvar lights_physical_pars_fragment = \"struct PhysicalMaterial {\\n\\tvec3 diffuseColor;\\n\\tfloat specularRoughness;\\n\\tvec3 specularColor;\\n#ifdef CLEARCOAT\\n\\tfloat clearcoat;\\n\\tfloat clearcoatRoughness;\\n#endif\\n#ifdef USE_SHEEN\\n\\tvec3 sheenColor;\\n#endif\\n};\\n#define MAXIMUM_SPECULAR_COEFFICIENT 0.16\\n#define DEFAULT_SPECULAR_COEFFICIENT 0.04\\nfloat clearcoatDHRApprox( const in float roughness, const in float dotNL ) {\\n\\treturn DEFAULT_SPECULAR_COEFFICIENT + ( 1.0 - DEFAULT_SPECULAR_COEFFICIENT ) * ( pow( 1.0 - dotNL, 5.0 ) * pow( 1.0 - roughness, 2.0 ) );\\n}\\n#if NUM_RECT_AREA_LIGHTS > 0\\n\\tvoid RE_Direct_RectArea_Physical( const in RectAreaLight rectAreaLight, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {\\n\\t\\tvec3 normal = geometry.normal;\\n\\t\\tvec3 viewDir = geometry.viewDir;\\n\\t\\tvec3 position = geometry.position;\\n\\t\\tvec3 lightPos = rectAreaLight.position;\\n\\t\\tvec3 halfWidth = rectAreaLight.halfWidth;\\n\\t\\tvec3 halfHeight = rectAreaLight.halfHeight;\\n\\t\\tvec3 lightColor = rectAreaLight.color;\\n\\t\\tfloat roughness = material.specularRoughness;\\n\\t\\tvec3 rectCoords[ 4 ];\\n\\t\\trectCoords[ 0 ] = lightPos + halfWidth - halfHeight;\\t\\trectCoords[ 1 ] = lightPos - halfWidth - halfHeight;\\n\\t\\trectCoords[ 2 ] = lightPos - halfWidth + halfHeight;\\n\\t\\trectCoords[ 3 ] = lightPos + halfWidth + halfHeight;\\n\\t\\tvec2 uv = LTC_Uv( normal, viewDir, roughness );\\n\\t\\tvec4 t1 = texture2D( ltc_1, uv );\\n\\t\\tvec4 t2 = texture2D( ltc_2, uv );\\n\\t\\tmat3 mInv = mat3(\\n\\t\\t\\tvec3( t1.x, 0, t1.y ),\\n\\t\\t\\tvec3(    0, 1,    0 ),\\n\\t\\t\\tvec3( t1.z, 0, t1.w )\\n\\t\\t);\\n\\t\\tvec3 fresnel = ( material.specularColor * t2.x + ( vec3( 1.0 ) - material.specularColor ) * t2.y );\\n\\t\\treflectedLight.directSpecular += lightColor * fresnel * LTC_Evaluate( normal, viewDir, position, mInv, rectCoords );\\n\\t\\treflectedLight.directDiffuse += lightColor * material.diffuseColor * LTC_Evaluate( normal, viewDir, position, mat3( 1.0 ), rectCoords );\\n\\t}\\n#endif\\nvoid RE_Direct_Physical( const in IncidentLight directLight, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {\\n\\tfloat dotNL = saturate( dot( geometry.normal, directLight.direction ) );\\n\\tvec3 irradiance = dotNL * directLight.color;\\n\\t#ifndef PHYSICALLY_CORRECT_LIGHTS\\n\\t\\tirradiance *= PI;\\n\\t#endif\\n\\t#ifdef CLEARCOAT\\n\\t\\tfloat ccDotNL = saturate( dot( geometry.clearcoatNormal, directLight.direction ) );\\n\\t\\tvec3 ccIrradiance = ccDotNL * directLight.color;\\n\\t\\t#ifndef PHYSICALLY_CORRECT_LIGHTS\\n\\t\\t\\tccIrradiance *= PI;\\n\\t\\t#endif\\n\\t\\tfloat clearcoatDHR = material.clearcoat * clearcoatDHRApprox( material.clearcoatRoughness, ccDotNL );\\n\\t\\treflectedLight.directSpecular += ccIrradiance * material.clearcoat * BRDF_Specular_GGX( directLight, geometry.viewDir, geometry.clearcoatNormal, vec3( DEFAULT_SPECULAR_COEFFICIENT ), material.clearcoatRoughness );\\n\\t#else\\n\\t\\tfloat clearcoatDHR = 0.0;\\n\\t#endif\\n\\t#ifdef USE_SHEEN\\n\\t\\treflectedLight.directSpecular += ( 1.0 - clearcoatDHR ) * irradiance * BRDF_Specular_Sheen(\\n\\t\\t\\tmaterial.specularRoughness,\\n\\t\\t\\tdirectLight.direction,\\n\\t\\t\\tgeometry,\\n\\t\\t\\tmaterial.sheenColor\\n\\t\\t);\\n\\t#else\\n\\t\\treflectedLight.directSpecular += ( 1.0 - clearcoatDHR ) * irradiance * BRDF_Specular_GGX( directLight, geometry.viewDir, geometry.normal, material.specularColor, material.specularRoughness);\\n\\t#endif\\n\\treflectedLight.directDiffuse += ( 1.0 - clearcoatDHR ) * irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\\n}\\nvoid RE_IndirectDiffuse_Physical( const in vec3 irradiance, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {\\n\\treflectedLight.indirectDiffuse += irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\\n}\\nvoid RE_IndirectSpecular_Physical( const in vec3 radiance, const in vec3 irradiance, const in vec3 clearcoatRadiance, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight) {\\n\\t#ifdef CLEARCOAT\\n\\t\\tfloat ccDotNV = saturate( dot( geometry.clearcoatNormal, geometry.viewDir ) );\\n\\t\\treflectedLight.indirectSpecular += clearcoatRadiance * material.clearcoat * BRDF_Specular_GGX_Environment( geometry.viewDir, geometry.clearcoatNormal, vec3( DEFAULT_SPECULAR_COEFFICIENT ), material.clearcoatRoughness );\\n\\t\\tfloat ccDotNL = ccDotNV;\\n\\t\\tfloat clearcoatDHR = material.clearcoat * clearcoatDHRApprox( material.clearcoatRoughness, ccDotNL );\\n\\t#else\\n\\t\\tfloat clearcoatDHR = 0.0;\\n\\t#endif\\n\\tfloat clearcoatInv = 1.0 - clearcoatDHR;\\n\\tvec3 singleScattering = vec3( 0.0 );\\n\\tvec3 multiScattering = vec3( 0.0 );\\n\\tvec3 cosineWeightedIrradiance = irradiance * RECIPROCAL_PI;\\n\\tBRDF_Specular_Multiscattering_Environment( geometry, material.specularColor, material.specularRoughness, singleScattering, multiScattering );\\n\\tvec3 diffuse = material.diffuseColor * ( 1.0 - ( singleScattering + multiScattering ) );\\n\\treflectedLight.indirectSpecular += clearcoatInv * radiance * singleScattering;\\n\\treflectedLight.indirectSpecular += multiScattering * cosineWeightedIrradiance;\\n\\treflectedLight.indirectDiffuse += diffuse * cosineWeightedIrradiance;\\n}\\n#define RE_Direct\\t\\t\\t\\tRE_Direct_Physical\\n#define RE_Direct_RectArea\\t\\tRE_Direct_RectArea_Physical\\n#define RE_IndirectDiffuse\\t\\tRE_IndirectDiffuse_Physical\\n#define RE_IndirectSpecular\\t\\tRE_IndirectSpecular_Physical\\nfloat computeSpecularOcclusion( const in float dotNV, const in float ambientOcclusion, const in float roughness ) {\\n\\treturn saturate( pow( dotNV + ambientOcclusion, exp2( - 16.0 * roughness - 1.0 ) ) - 1.0 + ambientOcclusion );\\n}\";\n\nvar lights_fragment_begin = \"\\nGeometricContext geometry;\\ngeometry.position = - vViewPosition;\\ngeometry.normal = normal;\\ngeometry.viewDir = ( isOrthographic ) ? vec3( 0, 0, 1 ) : normalize( vViewPosition );\\n#ifdef CLEARCOAT\\n\\tgeometry.clearcoatNormal = clearcoatNormal;\\n#endif\\nIncidentLight directLight;\\n#if ( NUM_POINT_LIGHTS > 0 ) && defined( RE_Direct )\\n\\tPointLight pointLight;\\n\\t#if defined( USE_SHADOWMAP ) && NUM_POINT_LIGHT_SHADOWS > 0\\n\\tPointLightShadow pointLightShadow;\\n\\t#endif\\n\\t#pragma unroll_loop_start\\n\\tfor ( int i = 0; i < NUM_POINT_LIGHTS; i ++ ) {\\n\\t\\tpointLight = pointLights[ i ];\\n\\t\\tgetPointDirectLightIrradiance( pointLight, geometry, directLight );\\n\\t\\t#if defined( USE_SHADOWMAP ) && ( UNROLLED_LOOP_INDEX < NUM_POINT_LIGHT_SHADOWS )\\n\\t\\tpointLightShadow = pointLightShadows[ i ];\\n\\t\\tdirectLight.color *= all( bvec2( directLight.visible, receiveShadow ) ) ? getPointShadow( pointShadowMap[ i ], pointLightShadow.shadowMapSize, pointLightShadow.shadowBias, pointLightShadow.shadowRadius, vPointShadowCoord[ i ], pointLightShadow.shadowCameraNear, pointLightShadow.shadowCameraFar ) : 1.0;\\n\\t\\t#endif\\n\\t\\tRE_Direct( directLight, geometry, material, reflectedLight );\\n\\t}\\n\\t#pragma unroll_loop_end\\n#endif\\n#if ( NUM_SPOT_LIGHTS > 0 ) && defined( RE_Direct )\\n\\tSpotLight spotLight;\\n\\t#if defined( USE_SHADOWMAP ) && NUM_SPOT_LIGHT_SHADOWS > 0\\n\\tSpotLightShadow spotLightShadow;\\n\\t#endif\\n\\t#pragma unroll_loop_start\\n\\tfor ( int i = 0; i < NUM_SPOT_LIGHTS; i ++ ) {\\n\\t\\tspotLight = spotLights[ i ];\\n\\t\\tgetSpotDirectLightIrradiance( spotLight, geometry, directLight );\\n\\t\\t#if defined( USE_SHADOWMAP ) && ( UNROLLED_LOOP_INDEX < NUM_SPOT_LIGHT_SHADOWS )\\n\\t\\tspotLightShadow = spotLightShadows[ i ];\\n\\t\\tdirectLight.color *= all( bvec2( directLight.visible, receiveShadow ) ) ? getShadow( spotShadowMap[ i ], spotLightShadow.shadowMapSize, spotLightShadow.shadowBias, spotLightShadow.shadowRadius, vSpotShadowCoord[ i ] ) : 1.0;\\n\\t\\t#endif\\n\\t\\tRE_Direct( directLight, geometry, material, reflectedLight );\\n\\t}\\n\\t#pragma unroll_loop_end\\n#endif\\n#if ( NUM_DIR_LIGHTS > 0 ) && defined( RE_Direct )\\n\\tDirectionalLight directionalLight;\\n\\t#if defined( USE_SHADOWMAP ) && NUM_DIR_LIGHT_SHADOWS > 0\\n\\tDirectionalLightShadow directionalLightShadow;\\n\\t#endif\\n\\t#pragma unroll_loop_start\\n\\tfor ( int i = 0; i < NUM_DIR_LIGHTS; i ++ ) {\\n\\t\\tdirectionalLight = directionalLights[ i ];\\n\\t\\tgetDirectionalDirectLightIrradiance( directionalLight, geometry, directLight );\\n\\t\\t#if defined( USE_SHADOWMAP ) && ( UNROLLED_LOOP_INDEX < NUM_DIR_LIGHT_SHADOWS )\\n\\t\\tdirectionalLightShadow = directionalLightShadows[ i ];\\n\\t\\tdirectLight.color *= all( bvec2( directLight.visible, receiveShadow ) ) ? getShadow( directionalShadowMap[ i ], directionalLightShadow.shadowMapSize, directionalLightShadow.shadowBias, directionalLightShadow.shadowRadius, vDirectionalShadowCoord[ i ] ) : 1.0;\\n\\t\\t#endif\\n\\t\\tRE_Direct( directLight, geometry, material, reflectedLight );\\n\\t}\\n\\t#pragma unroll_loop_end\\n#endif\\n#if ( NUM_RECT_AREA_LIGHTS > 0 ) && defined( RE_Direct_RectArea )\\n\\tRectAreaLight rectAreaLight;\\n\\t#pragma unroll_loop_start\\n\\tfor ( int i = 0; i < NUM_RECT_AREA_LIGHTS; i ++ ) {\\n\\t\\trectAreaLight = rectAreaLights[ i ];\\n\\t\\tRE_Direct_RectArea( rectAreaLight, geometry, material, reflectedLight );\\n\\t}\\n\\t#pragma unroll_loop_end\\n#endif\\n#if defined( RE_IndirectDiffuse )\\n\\tvec3 iblIrradiance = vec3( 0.0 );\\n\\tvec3 irradiance = getAmbientLightIrradiance( ambientLightColor );\\n\\tirradiance += getLightProbeIrradiance( lightProbe, geometry );\\n\\t#if ( NUM_HEMI_LIGHTS > 0 )\\n\\t\\t#pragma unroll_loop_start\\n\\t\\tfor ( int i = 0; i < NUM_HEMI_LIGHTS; i ++ ) {\\n\\t\\t\\tirradiance += getHemisphereLightIrradiance( hemisphereLights[ i ], geometry );\\n\\t\\t}\\n\\t\\t#pragma unroll_loop_end\\n\\t#endif\\n#endif\\n#if defined( RE_IndirectSpecular )\\n\\tvec3 radiance = vec3( 0.0 );\\n\\tvec3 clearcoatRadiance = vec3( 0.0 );\\n#endif\";\n\nvar lights_fragment_maps = \"#if defined( RE_IndirectDiffuse )\\n\\t#ifdef USE_LIGHTMAP\\n\\t\\tvec4 lightMapTexel= texture2D( lightMap, vUv2 );\\n\\t\\tvec3 lightMapIrradiance = lightMapTexelToLinear( lightMapTexel ).rgb * lightMapIntensity;\\n\\t\\t#ifndef PHYSICALLY_CORRECT_LIGHTS\\n\\t\\t\\tlightMapIrradiance *= PI;\\n\\t\\t#endif\\n\\t\\tirradiance += lightMapIrradiance;\\n\\t#endif\\n\\t#if defined( USE_ENVMAP ) && defined( STANDARD ) && defined( ENVMAP_TYPE_CUBE_UV )\\n\\t\\tiblIrradiance += getLightProbeIndirectIrradiance( geometry, maxMipLevel );\\n\\t#endif\\n#endif\\n#if defined( USE_ENVMAP ) && defined( RE_IndirectSpecular )\\n\\tradiance += getLightProbeIndirectRadiance( geometry.viewDir, geometry.normal, material.specularRoughness, maxMipLevel );\\n\\t#ifdef CLEARCOAT\\n\\t\\tclearcoatRadiance += getLightProbeIndirectRadiance( geometry.viewDir, geometry.clearcoatNormal, material.clearcoatRoughness, maxMipLevel );\\n\\t#endif\\n#endif\";\n\nvar lights_fragment_end = \"#if defined( RE_IndirectDiffuse )\\n\\tRE_IndirectDiffuse( irradiance, geometry, material, reflectedLight );\\n#endif\\n#if defined( RE_IndirectSpecular )\\n\\tRE_IndirectSpecular( radiance, iblIrradiance, clearcoatRadiance, geometry, material, reflectedLight );\\n#endif\";\n\nvar logdepthbuf_fragment = \"#if defined( USE_LOGDEPTHBUF ) && defined( USE_LOGDEPTHBUF_EXT )\\n\\tgl_FragDepthEXT = vIsPerspective == 0.0 ? gl_FragCoord.z : log2( vFragDepth ) * logDepthBufFC * 0.5;\\n#endif\";\n\nvar logdepthbuf_pars_fragment = \"#if defined( USE_LOGDEPTHBUF ) && defined( USE_LOGDEPTHBUF_EXT )\\n\\tuniform float logDepthBufFC;\\n\\tvarying float vFragDepth;\\n\\tvarying float vIsPerspective;\\n#endif\";\n\nvar logdepthbuf_pars_vertex = \"#ifdef USE_LOGDEPTHBUF\\n\\t#ifdef USE_LOGDEPTHBUF_EXT\\n\\t\\tvarying float vFragDepth;\\n\\t\\tvarying float vIsPerspective;\\n\\t#else\\n\\t\\tuniform float logDepthBufFC;\\n\\t#endif\\n#endif\";\n\nvar logdepthbuf_vertex = \"#ifdef USE_LOGDEPTHBUF\\n\\t#ifdef USE_LOGDEPTHBUF_EXT\\n\\t\\tvFragDepth = 1.0 + gl_Position.w;\\n\\t\\tvIsPerspective = float( isPerspectiveMatrix( projectionMatrix ) );\\n\\t#else\\n\\t\\tif ( isPerspectiveMatrix( projectionMatrix ) ) {\\n\\t\\t\\tgl_Position.z = log2( max( EPSILON, gl_Position.w + 1.0 ) ) * logDepthBufFC - 1.0;\\n\\t\\t\\tgl_Position.z *= gl_Position.w;\\n\\t\\t}\\n\\t#endif\\n#endif\";\n\nvar map_fragment = \"#ifdef USE_MAP\\n\\tvec4 texelColor = texture2D( map, vUv );\\n\\ttexelColor = mapTexelToLinear( texelColor );\\n\\tdiffuseColor *= texelColor;\\n#endif\";\n\nvar map_pars_fragment = \"#ifdef USE_MAP\\n\\tuniform sampler2D map;\\n#endif\";\n\nvar map_particle_fragment = \"#if defined( USE_MAP ) || defined( USE_ALPHAMAP )\\n\\tvec2 uv = ( uvTransform * vec3( gl_PointCoord.x, 1.0 - gl_PointCoord.y, 1 ) ).xy;\\n#endif\\n#ifdef USE_MAP\\n\\tvec4 mapTexel = texture2D( map, uv );\\n\\tdiffuseColor *= mapTexelToLinear( mapTexel );\\n#endif\\n#ifdef USE_ALPHAMAP\\n\\tdiffuseColor.a *= texture2D( alphaMap, uv ).g;\\n#endif\";\n\nvar map_particle_pars_fragment = \"#if defined( USE_MAP ) || defined( USE_ALPHAMAP )\\n\\tuniform mat3 uvTransform;\\n#endif\\n#ifdef USE_MAP\\n\\tuniform sampler2D map;\\n#endif\\n#ifdef USE_ALPHAMAP\\n\\tuniform sampler2D alphaMap;\\n#endif\";\n\nvar metalnessmap_fragment = \"float metalnessFactor = metalness;\\n#ifdef USE_METALNESSMAP\\n\\tvec4 texelMetalness = texture2D( metalnessMap, vUv );\\n\\tmetalnessFactor *= texelMetalness.b;\\n#endif\";\n\nvar metalnessmap_pars_fragment = \"#ifdef USE_METALNESSMAP\\n\\tuniform sampler2D metalnessMap;\\n#endif\";\n\nvar morphnormal_vertex = \"#ifdef USE_MORPHNORMALS\\n\\tobjectNormal *= morphTargetBaseInfluence;\\n\\tobjectNormal += morphNormal0 * morphTargetInfluences[ 0 ];\\n\\tobjectNormal += morphNormal1 * morphTargetInfluences[ 1 ];\\n\\tobjectNormal += morphNormal2 * morphTargetInfluences[ 2 ];\\n\\tobjectNormal += morphNormal3 * morphTargetInfluences[ 3 ];\\n#endif\";\n\nvar morphtarget_pars_vertex = \"#ifdef USE_MORPHTARGETS\\n\\tuniform float morphTargetBaseInfluence;\\n\\t#ifndef USE_MORPHNORMALS\\n\\t\\tuniform float morphTargetInfluences[ 8 ];\\n\\t#else\\n\\t\\tuniform float morphTargetInfluences[ 4 ];\\n\\t#endif\\n#endif\";\n\nvar morphtarget_vertex = \"#ifdef USE_MORPHTARGETS\\n\\ttransformed *= morphTargetBaseInfluence;\\n\\ttransformed += morphTarget0 * morphTargetInfluences[ 0 ];\\n\\ttransformed += morphTarget1 * morphTargetInfluences[ 1 ];\\n\\ttransformed += morphTarget2 * morphTargetInfluences[ 2 ];\\n\\ttransformed += morphTarget3 * morphTargetInfluences[ 3 ];\\n\\t#ifndef USE_MORPHNORMALS\\n\\t\\ttransformed += morphTarget4 * morphTargetInfluences[ 4 ];\\n\\t\\ttransformed += morphTarget5 * morphTargetInfluences[ 5 ];\\n\\t\\ttransformed += morphTarget6 * morphTargetInfluences[ 6 ];\\n\\t\\ttransformed += morphTarget7 * morphTargetInfluences[ 7 ];\\n\\t#endif\\n#endif\";\n\nvar normal_fragment_begin = \"#ifdef FLAT_SHADED\\n\\tvec3 fdx = vec3( dFdx( vViewPosition.x ), dFdx( vViewPosition.y ), dFdx( vViewPosition.z ) );\\n\\tvec3 fdy = vec3( dFdy( vViewPosition.x ), dFdy( vViewPosition.y ), dFdy( vViewPosition.z ) );\\n\\tvec3 normal = normalize( cross( fdx, fdy ) );\\n#else\\n\\tvec3 normal = normalize( vNormal );\\n\\t#ifdef DOUBLE_SIDED\\n\\t\\tnormal = normal * ( float( gl_FrontFacing ) * 2.0 - 1.0 );\\n\\t#endif\\n\\t#ifdef USE_TANGENT\\n\\t\\tvec3 tangent = normalize( vTangent );\\n\\t\\tvec3 bitangent = normalize( vBitangent );\\n\\t\\t#ifdef DOUBLE_SIDED\\n\\t\\t\\ttangent = tangent * ( float( gl_FrontFacing ) * 2.0 - 1.0 );\\n\\t\\t\\tbitangent = bitangent * ( float( gl_FrontFacing ) * 2.0 - 1.0 );\\n\\t\\t#endif\\n\\t\\t#if defined( TANGENTSPACE_NORMALMAP ) || defined( USE_CLEARCOAT_NORMALMAP )\\n\\t\\t\\tmat3 vTBN = mat3( tangent, bitangent, normal );\\n\\t\\t#endif\\n\\t#endif\\n#endif\\nvec3 geometryNormal = normal;\";\n\nvar normal_fragment_maps = \"#ifdef OBJECTSPACE_NORMALMAP\\n\\tnormal = texture2D( normalMap, vUv ).xyz * 2.0 - 1.0;\\n\\t#ifdef FLIP_SIDED\\n\\t\\tnormal = - normal;\\n\\t#endif\\n\\t#ifdef DOUBLE_SIDED\\n\\t\\tnormal = normal * ( float( gl_FrontFacing ) * 2.0 - 1.0 );\\n\\t#endif\\n\\tnormal = normalize( normalMatrix * normal );\\n#elif defined( TANGENTSPACE_NORMALMAP )\\n\\tvec3 mapN = texture2D( normalMap, vUv ).xyz * 2.0 - 1.0;\\n\\tmapN.xy *= normalScale;\\n\\t#ifdef USE_TANGENT\\n\\t\\tnormal = normalize( vTBN * mapN );\\n\\t#else\\n\\t\\tnormal = perturbNormal2Arb( -vViewPosition, normal, mapN );\\n\\t#endif\\n#elif defined( USE_BUMPMAP )\\n\\tnormal = perturbNormalArb( -vViewPosition, normal, dHdxy_fwd() );\\n#endif\";\n\nvar normalmap_pars_fragment = \"#ifdef USE_NORMALMAP\\n\\tuniform sampler2D normalMap;\\n\\tuniform vec2 normalScale;\\n#endif\\n#ifdef OBJECTSPACE_NORMALMAP\\n\\tuniform mat3 normalMatrix;\\n#endif\\n#if ! defined ( USE_TANGENT ) && ( defined ( TANGENTSPACE_NORMALMAP ) || defined ( USE_CLEARCOAT_NORMALMAP ) )\\n\\tvec3 perturbNormal2Arb( vec3 eye_pos, vec3 surf_norm, vec3 mapN ) {\\n\\t\\tvec3 q0 = vec3( dFdx( eye_pos.x ), dFdx( eye_pos.y ), dFdx( eye_pos.z ) );\\n\\t\\tvec3 q1 = vec3( dFdy( eye_pos.x ), dFdy( eye_pos.y ), dFdy( eye_pos.z ) );\\n\\t\\tvec2 st0 = dFdx( vUv.st );\\n\\t\\tvec2 st1 = dFdy( vUv.st );\\n\\t\\tfloat scale = sign( st1.t * st0.s - st0.t * st1.s );\\n\\t\\tvec3 S = normalize( ( q0 * st1.t - q1 * st0.t ) * scale );\\n\\t\\tvec3 T = normalize( ( - q0 * st1.s + q1 * st0.s ) * scale );\\n\\t\\tvec3 N = normalize( surf_norm );\\n\\t\\tmat3 tsn = mat3( S, T, N );\\n\\t\\tmapN.xy *= ( float( gl_FrontFacing ) * 2.0 - 1.0 );\\n\\t\\treturn normalize( tsn * mapN );\\n\\t}\\n#endif\";\n\nvar clearcoat_normal_fragment_begin = \"#ifdef CLEARCOAT\\n\\tvec3 clearcoatNormal = geometryNormal;\\n#endif\";\n\nvar clearcoat_normal_fragment_maps = \"#ifdef USE_CLEARCOAT_NORMALMAP\\n\\tvec3 clearcoatMapN = texture2D( clearcoatNormalMap, vUv ).xyz * 2.0 - 1.0;\\n\\tclearcoatMapN.xy *= clearcoatNormalScale;\\n\\t#ifdef USE_TANGENT\\n\\t\\tclearcoatNormal = normalize( vTBN * clearcoatMapN );\\n\\t#else\\n\\t\\tclearcoatNormal = perturbNormal2Arb( - vViewPosition, clearcoatNormal, clearcoatMapN );\\n\\t#endif\\n#endif\";\n\nvar clearcoat_pars_fragment = \"#ifdef USE_CLEARCOATMAP\\n\\tuniform sampler2D clearcoatMap;\\n#endif\\n#ifdef USE_CLEARCOAT_ROUGHNESSMAP\\n\\tuniform sampler2D clearcoatRoughnessMap;\\n#endif\\n#ifdef USE_CLEARCOAT_NORMALMAP\\n\\tuniform sampler2D clearcoatNormalMap;\\n\\tuniform vec2 clearcoatNormalScale;\\n#endif\";\n\nvar packing = \"vec3 packNormalToRGB( const in vec3 normal ) {\\n\\treturn normalize( normal ) * 0.5 + 0.5;\\n}\\nvec3 unpackRGBToNormal( const in vec3 rgb ) {\\n\\treturn 2.0 * rgb.xyz - 1.0;\\n}\\nconst float PackUpscale = 256. / 255.;const float UnpackDownscale = 255. / 256.;\\nconst vec3 PackFactors = vec3( 256. * 256. * 256., 256. * 256., 256. );\\nconst vec4 UnpackFactors = UnpackDownscale / vec4( PackFactors, 1. );\\nconst float ShiftRight8 = 1. / 256.;\\nvec4 packDepthToRGBA( const in float v ) {\\n\\tvec4 r = vec4( fract( v * PackFactors ), v );\\n\\tr.yzw -= r.xyz * ShiftRight8;\\treturn r * PackUpscale;\\n}\\nfloat unpackRGBAToDepth( const in vec4 v ) {\\n\\treturn dot( v, UnpackFactors );\\n}\\nvec4 pack2HalfToRGBA( vec2 v ) {\\n\\tvec4 r = vec4( v.x, fract( v.x * 255.0 ), v.y, fract( v.y * 255.0 ));\\n\\treturn vec4( r.x - r.y / 255.0, r.y, r.z - r.w / 255.0, r.w);\\n}\\nvec2 unpackRGBATo2Half( vec4 v ) {\\n\\treturn vec2( v.x + ( v.y / 255.0 ), v.z + ( v.w / 255.0 ) );\\n}\\nfloat viewZToOrthographicDepth( const in float viewZ, const in float near, const in float far ) {\\n\\treturn ( viewZ + near ) / ( near - far );\\n}\\nfloat orthographicDepthToViewZ( const in float linearClipZ, const in float near, const in float far ) {\\n\\treturn linearClipZ * ( near - far ) - near;\\n}\\nfloat viewZToPerspectiveDepth( const in float viewZ, const in float near, const in float far ) {\\n\\treturn (( near + viewZ ) * far ) / (( far - near ) * viewZ );\\n}\\nfloat perspectiveDepthToViewZ( const in float invClipZ, const in float near, const in float far ) {\\n\\treturn ( near * far ) / ( ( far - near ) * invClipZ - far );\\n}\";\n\nvar premultiplied_alpha_fragment = \"#ifdef PREMULTIPLIED_ALPHA\\n\\tgl_FragColor.rgb *= gl_FragColor.a;\\n#endif\";\n\nvar project_vertex = \"vec4 mvPosition = vec4( transformed, 1.0 );\\n#ifdef USE_INSTANCING\\n\\tmvPosition = instanceMatrix * mvPosition;\\n#endif\\nmvPosition = modelViewMatrix * mvPosition;\\ngl_Position = projectionMatrix * mvPosition;\";\n\nvar dithering_fragment = \"#ifdef DITHERING\\n\\tgl_FragColor.rgb = dithering( gl_FragColor.rgb );\\n#endif\";\n\nvar dithering_pars_fragment = \"#ifdef DITHERING\\n\\tvec3 dithering( vec3 color ) {\\n\\t\\tfloat grid_position = rand( gl_FragCoord.xy );\\n\\t\\tvec3 dither_shift_RGB = vec3( 0.25 / 255.0, -0.25 / 255.0, 0.25 / 255.0 );\\n\\t\\tdither_shift_RGB = mix( 2.0 * dither_shift_RGB, -2.0 * dither_shift_RGB, grid_position );\\n\\t\\treturn color + dither_shift_RGB;\\n\\t}\\n#endif\";\n\nvar roughnessmap_fragment = \"float roughnessFactor = roughness;\\n#ifdef USE_ROUGHNESSMAP\\n\\tvec4 texelRoughness = texture2D( roughnessMap, vUv );\\n\\troughnessFactor *= texelRoughness.g;\\n#endif\";\n\nvar roughnessmap_pars_fragment = \"#ifdef USE_ROUGHNESSMAP\\n\\tuniform sampler2D roughnessMap;\\n#endif\";\n\nvar shadowmap_pars_fragment = \"#ifdef USE_SHADOWMAP\\n\\t#if NUM_DIR_LIGHT_SHADOWS > 0\\n\\t\\tuniform sampler2D directionalShadowMap[ NUM_DIR_LIGHT_SHADOWS ];\\n\\t\\tvarying vec4 vDirectionalShadowCoord[ NUM_DIR_LIGHT_SHADOWS ];\\n\\t\\tstruct DirectionalLightShadow {\\n\\t\\t\\tfloat shadowBias;\\n\\t\\t\\tfloat shadowNormalBias;\\n\\t\\t\\tfloat shadowRadius;\\n\\t\\t\\tvec2 shadowMapSize;\\n\\t\\t};\\n\\t\\tuniform DirectionalLightShadow directionalLightShadows[ NUM_DIR_LIGHT_SHADOWS ];\\n\\t#endif\\n\\t#if NUM_SPOT_LIGHT_SHADOWS > 0\\n\\t\\tuniform sampler2D spotShadowMap[ NUM_SPOT_LIGHT_SHADOWS ];\\n\\t\\tvarying vec4 vSpotShadowCoord[ NUM_SPOT_LIGHT_SHADOWS ];\\n\\t\\tstruct SpotLightShadow {\\n\\t\\t\\tfloat shadowBias;\\n\\t\\t\\tfloat shadowNormalBias;\\n\\t\\t\\tfloat shadowRadius;\\n\\t\\t\\tvec2 shadowMapSize;\\n\\t\\t};\\n\\t\\tuniform SpotLightShadow spotLightShadows[ NUM_SPOT_LIGHT_SHADOWS ];\\n\\t#endif\\n\\t#if NUM_POINT_LIGHT_SHADOWS > 0\\n\\t\\tuniform sampler2D pointShadowMap[ NUM_POINT_LIGHT_SHADOWS ];\\n\\t\\tvarying vec4 vPointShadowCoord[ NUM_POINT_LIGHT_SHADOWS ];\\n\\t\\tstruct PointLightShadow {\\n\\t\\t\\tfloat shadowBias;\\n\\t\\t\\tfloat shadowNormalBias;\\n\\t\\t\\tfloat shadowRadius;\\n\\t\\t\\tvec2 shadowMapSize;\\n\\t\\t\\tfloat shadowCameraNear;\\n\\t\\t\\tfloat shadowCameraFar;\\n\\t\\t};\\n\\t\\tuniform PointLightShadow pointLightShadows[ NUM_POINT_LIGHT_SHADOWS ];\\n\\t#endif\\n\\tfloat texture2DCompare( sampler2D depths, vec2 uv, float compare ) {\\n\\t\\treturn step( compare, unpackRGBAToDepth( texture2D( depths, uv ) ) );\\n\\t}\\n\\tvec2 texture2DDistribution( sampler2D shadow, vec2 uv ) {\\n\\t\\treturn unpackRGBATo2Half( texture2D( shadow, uv ) );\\n\\t}\\n\\tfloat VSMShadow (sampler2D shadow, vec2 uv, float compare ){\\n\\t\\tfloat occlusion = 1.0;\\n\\t\\tvec2 distribution = texture2DDistribution( shadow, uv );\\n\\t\\tfloat hard_shadow = step( compare , distribution.x );\\n\\t\\tif (hard_shadow != 1.0 ) {\\n\\t\\t\\tfloat distance = compare - distribution.x ;\\n\\t\\t\\tfloat variance = max( 0.00000, distribution.y * distribution.y );\\n\\t\\t\\tfloat softness_probability = variance / (variance + distance * distance );\\t\\t\\tsoftness_probability = clamp( ( softness_probability - 0.3 ) / ( 0.95 - 0.3 ), 0.0, 1.0 );\\t\\t\\tocclusion = clamp( max( hard_shadow, softness_probability ), 0.0, 1.0 );\\n\\t\\t}\\n\\t\\treturn occlusion;\\n\\t}\\n\\tfloat getShadow( sampler2D shadowMap, vec2 shadowMapSize, float shadowBias, float shadowRadius, vec4 shadowCoord ) {\\n\\t\\tfloat shadow = 1.0;\\n\\t\\tshadowCoord.xyz /= shadowCoord.w;\\n\\t\\tshadowCoord.z += shadowBias;\\n\\t\\tbvec4 inFrustumVec = bvec4 ( shadowCoord.x >= 0.0, shadowCoord.x <= 1.0, shadowCoord.y >= 0.0, shadowCoord.y <= 1.0 );\\n\\t\\tbool inFrustum = all( inFrustumVec );\\n\\t\\tbvec2 frustumTestVec = bvec2( inFrustum, shadowCoord.z <= 1.0 );\\n\\t\\tbool frustumTest = all( frustumTestVec );\\n\\t\\tif ( frustumTest ) {\\n\\t\\t#if defined( SHADOWMAP_TYPE_PCF )\\n\\t\\t\\tvec2 texelSize = vec2( 1.0 ) / shadowMapSize;\\n\\t\\t\\tfloat dx0 = - texelSize.x * shadowRadius;\\n\\t\\t\\tfloat dy0 = - texelSize.y * shadowRadius;\\n\\t\\t\\tfloat dx1 = + texelSize.x * shadowRadius;\\n\\t\\t\\tfloat dy1 = + texelSize.y * shadowRadius;\\n\\t\\t\\tfloat dx2 = dx0 / 2.0;\\n\\t\\t\\tfloat dy2 = dy0 / 2.0;\\n\\t\\t\\tfloat dx3 = dx1 / 2.0;\\n\\t\\t\\tfloat dy3 = dy1 / 2.0;\\n\\t\\t\\tshadow = (\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, dy0 ), shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy0 ), shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, dy0 ), shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx2, dy2 ), shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy2 ), shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx3, dy2 ), shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, 0.0 ), shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx2, 0.0 ), shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, shadowCoord.xy, shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx3, 0.0 ), shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, 0.0 ), shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx2, dy3 ), shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy3 ), shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx3, dy3 ), shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, dy1 ), shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy1 ), shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, dy1 ), shadowCoord.z )\\n\\t\\t\\t) * ( 1.0 / 17.0 );\\n\\t\\t#elif defined( SHADOWMAP_TYPE_PCF_SOFT )\\n\\t\\t\\tvec2 texelSize = vec2( 1.0 ) / shadowMapSize;\\n\\t\\t\\tfloat dx = texelSize.x;\\n\\t\\t\\tfloat dy = texelSize.y;\\n\\t\\t\\tvec2 uv = shadowCoord.xy;\\n\\t\\t\\tvec2 f = fract( uv * shadowMapSize + 0.5 );\\n\\t\\t\\tuv -= f * texelSize;\\n\\t\\t\\tshadow = (\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, uv, shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, uv + vec2( dx, 0.0 ), shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, uv + vec2( 0.0, dy ), shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, uv + texelSize, shadowCoord.z ) +\\n\\t\\t\\t\\tmix( texture2DCompare( shadowMap, uv + vec2( -dx, 0.0 ), shadowCoord.z ), \\n\\t\\t\\t\\t\\t texture2DCompare( shadowMap, uv + vec2( 2.0 * dx, 0.0 ), shadowCoord.z ),\\n\\t\\t\\t\\t\\t f.x ) +\\n\\t\\t\\t\\tmix( texture2DCompare( shadowMap, uv + vec2( -dx, dy ), shadowCoord.z ), \\n\\t\\t\\t\\t\\t texture2DCompare( shadowMap, uv + vec2( 2.0 * dx, dy ), shadowCoord.z ),\\n\\t\\t\\t\\t\\t f.x ) +\\n\\t\\t\\t\\tmix( texture2DCompare( shadowMap, uv + vec2( 0.0, -dy ), shadowCoord.z ), \\n\\t\\t\\t\\t\\t texture2DCompare( shadowMap, uv + vec2( 0.0, 2.0 * dy ), shadowCoord.z ),\\n\\t\\t\\t\\t\\t f.y ) +\\n\\t\\t\\t\\tmix( texture2DCompare( shadowMap, uv + vec2( dx, -dy ), shadowCoord.z ), \\n\\t\\t\\t\\t\\t texture2DCompare( shadowMap, uv + vec2( dx, 2.0 * dy ), shadowCoord.z ),\\n\\t\\t\\t\\t\\t f.y ) +\\n\\t\\t\\t\\tmix( mix( texture2DCompare( shadowMap, uv + vec2( -dx, -dy ), shadowCoord.z ), \\n\\t\\t\\t\\t\\t\\t  texture2DCompare( shadowMap, uv + vec2( 2.0 * dx, -dy ), shadowCoord.z ),\\n\\t\\t\\t\\t\\t\\t  f.x ),\\n\\t\\t\\t\\t\\t mix( texture2DCompare( shadowMap, uv + vec2( -dx, 2.0 * dy ), shadowCoord.z ), \\n\\t\\t\\t\\t\\t\\t  texture2DCompare( shadowMap, uv + vec2( 2.0 * dx, 2.0 * dy ), shadowCoord.z ),\\n\\t\\t\\t\\t\\t\\t  f.x ),\\n\\t\\t\\t\\t\\t f.y )\\n\\t\\t\\t) * ( 1.0 / 9.0 );\\n\\t\\t#elif defined( SHADOWMAP_TYPE_VSM )\\n\\t\\t\\tshadow = VSMShadow( shadowMap, shadowCoord.xy, shadowCoord.z );\\n\\t\\t#else\\n\\t\\t\\tshadow = texture2DCompare( shadowMap, shadowCoord.xy, shadowCoord.z );\\n\\t\\t#endif\\n\\t\\t}\\n\\t\\treturn shadow;\\n\\t}\\n\\tvec2 cubeToUV( vec3 v, float texelSizeY ) {\\n\\t\\tvec3 absV = abs( v );\\n\\t\\tfloat scaleToCube = 1.0 / max( absV.x, max( absV.y, absV.z ) );\\n\\t\\tabsV *= scaleToCube;\\n\\t\\tv *= scaleToCube * ( 1.0 - 2.0 * texelSizeY );\\n\\t\\tvec2 planar = v.xy;\\n\\t\\tfloat almostATexel = 1.5 * texelSizeY;\\n\\t\\tfloat almostOne = 1.0 - almostATexel;\\n\\t\\tif ( absV.z >= almostOne ) {\\n\\t\\t\\tif ( v.z > 0.0 )\\n\\t\\t\\t\\tplanar.x = 4.0 - v.x;\\n\\t\\t} else if ( absV.x >= almostOne ) {\\n\\t\\t\\tfloat signX = sign( v.x );\\n\\t\\t\\tplanar.x = v.z * signX + 2.0 * signX;\\n\\t\\t} else if ( absV.y >= almostOne ) {\\n\\t\\t\\tfloat signY = sign( v.y );\\n\\t\\t\\tplanar.x = v.x + 2.0 * signY + 2.0;\\n\\t\\t\\tplanar.y = v.z * signY - 2.0;\\n\\t\\t}\\n\\t\\treturn vec2( 0.125, 0.25 ) * planar + vec2( 0.375, 0.75 );\\n\\t}\\n\\tfloat getPointShadow( sampler2D shadowMap, vec2 shadowMapSize, float shadowBias, float shadowRadius, vec4 shadowCoord, float shadowCameraNear, float shadowCameraFar ) {\\n\\t\\tvec2 texelSize = vec2( 1.0 ) / ( shadowMapSize * vec2( 4.0, 2.0 ) );\\n\\t\\tvec3 lightToPosition = shadowCoord.xyz;\\n\\t\\tfloat dp = ( length( lightToPosition ) - shadowCameraNear ) / ( shadowCameraFar - shadowCameraNear );\\t\\tdp += shadowBias;\\n\\t\\tvec3 bd3D = normalize( lightToPosition );\\n\\t\\t#if defined( SHADOWMAP_TYPE_PCF ) || defined( SHADOWMAP_TYPE_PCF_SOFT ) || defined( SHADOWMAP_TYPE_VSM )\\n\\t\\t\\tvec2 offset = vec2( - 1, 1 ) * shadowRadius * texelSize.y;\\n\\t\\t\\treturn (\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.xyy, texelSize.y ), dp ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.yyy, texelSize.y ), dp ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.xyx, texelSize.y ), dp ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.yyx, texelSize.y ), dp ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, cubeToUV( bd3D, texelSize.y ), dp ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.xxy, texelSize.y ), dp ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.yxy, texelSize.y ), dp ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.xxx, texelSize.y ), dp ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.yxx, texelSize.y ), dp )\\n\\t\\t\\t) * ( 1.0 / 9.0 );\\n\\t\\t#else\\n\\t\\t\\treturn texture2DCompare( shadowMap, cubeToUV( bd3D, texelSize.y ), dp );\\n\\t\\t#endif\\n\\t}\\n#endif\";\n\nvar shadowmap_pars_vertex = \"#ifdef USE_SHADOWMAP\\n\\t#if NUM_DIR_LIGHT_SHADOWS > 0\\n\\t\\tuniform mat4 directionalShadowMatrix[ NUM_DIR_LIGHT_SHADOWS ];\\n\\t\\tvarying vec4 vDirectionalShadowCoord[ NUM_DIR_LIGHT_SHADOWS ];\\n\\t\\tstruct DirectionalLightShadow {\\n\\t\\t\\tfloat shadowBias;\\n\\t\\t\\tfloat shadowNormalBias;\\n\\t\\t\\tfloat shadowRadius;\\n\\t\\t\\tvec2 shadowMapSize;\\n\\t\\t};\\n\\t\\tuniform DirectionalLightShadow directionalLightShadows[ NUM_DIR_LIGHT_SHADOWS ];\\n\\t#endif\\n\\t#if NUM_SPOT_LIGHT_SHADOWS > 0\\n\\t\\tuniform mat4 spotShadowMatrix[ NUM_SPOT_LIGHT_SHADOWS ];\\n\\t\\tvarying vec4 vSpotShadowCoord[ NUM_SPOT_LIGHT_SHADOWS ];\\n\\t\\tstruct SpotLightShadow {\\n\\t\\t\\tfloat shadowBias;\\n\\t\\t\\tfloat shadowNormalBias;\\n\\t\\t\\tfloat shadowRadius;\\n\\t\\t\\tvec2 shadowMapSize;\\n\\t\\t};\\n\\t\\tuniform SpotLightShadow spotLightShadows[ NUM_SPOT_LIGHT_SHADOWS ];\\n\\t#endif\\n\\t#if NUM_POINT_LIGHT_SHADOWS > 0\\n\\t\\tuniform mat4 pointShadowMatrix[ NUM_POINT_LIGHT_SHADOWS ];\\n\\t\\tvarying vec4 vPointShadowCoord[ NUM_POINT_LIGHT_SHADOWS ];\\n\\t\\tstruct PointLightShadow {\\n\\t\\t\\tfloat shadowBias;\\n\\t\\t\\tfloat shadowNormalBias;\\n\\t\\t\\tfloat shadowRadius;\\n\\t\\t\\tvec2 shadowMapSize;\\n\\t\\t\\tfloat shadowCameraNear;\\n\\t\\t\\tfloat shadowCameraFar;\\n\\t\\t};\\n\\t\\tuniform PointLightShadow pointLightShadows[ NUM_POINT_LIGHT_SHADOWS ];\\n\\t#endif\\n#endif\";\n\nvar shadowmap_vertex = \"#ifdef USE_SHADOWMAP\\n\\t#if NUM_DIR_LIGHT_SHADOWS > 0 || NUM_SPOT_LIGHT_SHADOWS > 0 || NUM_POINT_LIGHT_SHADOWS > 0\\n\\t\\tvec3 shadowWorldNormal = inverseTransformDirection( transformedNormal, viewMatrix );\\n\\t\\tvec4 shadowWorldPosition;\\n\\t#endif\\n\\t#if NUM_DIR_LIGHT_SHADOWS > 0\\n\\t#pragma unroll_loop_start\\n\\tfor ( int i = 0; i < NUM_DIR_LIGHT_SHADOWS; i ++ ) {\\n\\t\\tshadowWorldPosition = worldPosition + vec4( shadowWorldNormal * directionalLightShadows[ i ].shadowNormalBias, 0 );\\n\\t\\tvDirectionalShadowCoord[ i ] = directionalShadowMatrix[ i ] * shadowWorldPosition;\\n\\t}\\n\\t#pragma unroll_loop_end\\n\\t#endif\\n\\t#if NUM_SPOT_LIGHT_SHADOWS > 0\\n\\t#pragma unroll_loop_start\\n\\tfor ( int i = 0; i < NUM_SPOT_LIGHT_SHADOWS; i ++ ) {\\n\\t\\tshadowWorldPosition = worldPosition + vec4( shadowWorldNormal * spotLightShadows[ i ].shadowNormalBias, 0 );\\n\\t\\tvSpotShadowCoord[ i ] = spotShadowMatrix[ i ] * shadowWorldPosition;\\n\\t}\\n\\t#pragma unroll_loop_end\\n\\t#endif\\n\\t#if NUM_POINT_LIGHT_SHADOWS > 0\\n\\t#pragma unroll_loop_start\\n\\tfor ( int i = 0; i < NUM_POINT_LIGHT_SHADOWS; i ++ ) {\\n\\t\\tshadowWorldPosition = worldPosition + vec4( shadowWorldNormal * pointLightShadows[ i ].shadowNormalBias, 0 );\\n\\t\\tvPointShadowCoord[ i ] = pointShadowMatrix[ i ] * shadowWorldPosition;\\n\\t}\\n\\t#pragma unroll_loop_end\\n\\t#endif\\n#endif\";\n\nvar shadowmask_pars_fragment = \"float getShadowMask() {\\n\\tfloat shadow = 1.0;\\n\\t#ifdef USE_SHADOWMAP\\n\\t#if NUM_DIR_LIGHT_SHADOWS > 0\\n\\tDirectionalLightShadow directionalLight;\\n\\t#pragma unroll_loop_start\\n\\tfor ( int i = 0; i < NUM_DIR_LIGHT_SHADOWS; i ++ ) {\\n\\t\\tdirectionalLight = directionalLightShadows[ i ];\\n\\t\\tshadow *= receiveShadow ? getShadow( directionalShadowMap[ i ], directionalLight.shadowMapSize, directionalLight.shadowBias, directionalLight.shadowRadius, vDirectionalShadowCoord[ i ] ) : 1.0;\\n\\t}\\n\\t#pragma unroll_loop_end\\n\\t#endif\\n\\t#if NUM_SPOT_LIGHT_SHADOWS > 0\\n\\tSpotLightShadow spotLight;\\n\\t#pragma unroll_loop_start\\n\\tfor ( int i = 0; i < NUM_SPOT_LIGHT_SHADOWS; i ++ ) {\\n\\t\\tspotLight = spotLightShadows[ i ];\\n\\t\\tshadow *= receiveShadow ? getShadow( spotShadowMap[ i ], spotLight.shadowMapSize, spotLight.shadowBias, spotLight.shadowRadius, vSpotShadowCoord[ i ] ) : 1.0;\\n\\t}\\n\\t#pragma unroll_loop_end\\n\\t#endif\\n\\t#if NUM_POINT_LIGHT_SHADOWS > 0\\n\\tPointLightShadow pointLight;\\n\\t#pragma unroll_loop_start\\n\\tfor ( int i = 0; i < NUM_POINT_LIGHT_SHADOWS; i ++ ) {\\n\\t\\tpointLight = pointLightShadows[ i ];\\n\\t\\tshadow *= receiveShadow ? getPointShadow( pointShadowMap[ i ], pointLight.shadowMapSize, pointLight.shadowBias, pointLight.shadowRadius, vPointShadowCoord[ i ], pointLight.shadowCameraNear, pointLight.shadowCameraFar ) : 1.0;\\n\\t}\\n\\t#pragma unroll_loop_end\\n\\t#endif\\n\\t#endif\\n\\treturn shadow;\\n}\";\n\nvar skinbase_vertex = \"#ifdef USE_SKINNING\\n\\tmat4 boneMatX = getBoneMatrix( skinIndex.x );\\n\\tmat4 boneMatY = getBoneMatrix( skinIndex.y );\\n\\tmat4 boneMatZ = getBoneMatrix( skinIndex.z );\\n\\tmat4 boneMatW = getBoneMatrix( skinIndex.w );\\n#endif\";\n\nvar skinning_pars_vertex = \"#ifdef USE_SKINNING\\n\\tuniform mat4 bindMatrix;\\n\\tuniform mat4 bindMatrixInverse;\\n\\t#ifdef BONE_TEXTURE\\n\\t\\tuniform highp sampler2D boneTexture;\\n\\t\\tuniform int boneTextureSize;\\n\\t\\tmat4 getBoneMatrix( const in float i ) {\\n\\t\\t\\tfloat j = i * 4.0;\\n\\t\\t\\tfloat x = mod( j, float( boneTextureSize ) );\\n\\t\\t\\tfloat y = floor( j / float( boneTextureSize ) );\\n\\t\\t\\tfloat dx = 1.0 / float( boneTextureSize );\\n\\t\\t\\tfloat dy = 1.0 / float( boneTextureSize );\\n\\t\\t\\ty = dy * ( y + 0.5 );\\n\\t\\t\\tvec4 v1 = texture2D( boneTexture, vec2( dx * ( x + 0.5 ), y ) );\\n\\t\\t\\tvec4 v2 = texture2D( boneTexture, vec2( dx * ( x + 1.5 ), y ) );\\n\\t\\t\\tvec4 v3 = texture2D( boneTexture, vec2( dx * ( x + 2.5 ), y ) );\\n\\t\\t\\tvec4 v4 = texture2D( boneTexture, vec2( dx * ( x + 3.5 ), y ) );\\n\\t\\t\\tmat4 bone = mat4( v1, v2, v3, v4 );\\n\\t\\t\\treturn bone;\\n\\t\\t}\\n\\t#else\\n\\t\\tuniform mat4 boneMatrices[ MAX_BONES ];\\n\\t\\tmat4 getBoneMatrix( const in float i ) {\\n\\t\\t\\tmat4 bone = boneMatrices[ int(i) ];\\n\\t\\t\\treturn bone;\\n\\t\\t}\\n\\t#endif\\n#endif\";\n\nvar skinning_vertex = \"#ifdef USE_SKINNING\\n\\tvec4 skinVertex = bindMatrix * vec4( transformed, 1.0 );\\n\\tvec4 skinned = vec4( 0.0 );\\n\\tskinned += boneMatX * skinVertex * skinWeight.x;\\n\\tskinned += boneMatY * skinVertex * skinWeight.y;\\n\\tskinned += boneMatZ * skinVertex * skinWeight.z;\\n\\tskinned += boneMatW * skinVertex * skinWeight.w;\\n\\ttransformed = ( bindMatrixInverse * skinned ).xyz;\\n#endif\";\n\nvar skinnormal_vertex = \"#ifdef USE_SKINNING\\n\\tmat4 skinMatrix = mat4( 0.0 );\\n\\tskinMatrix += skinWeight.x * boneMatX;\\n\\tskinMatrix += skinWeight.y * boneMatY;\\n\\tskinMatrix += skinWeight.z * boneMatZ;\\n\\tskinMatrix += skinWeight.w * boneMatW;\\n\\tskinMatrix = bindMatrixInverse * skinMatrix * bindMatrix;\\n\\tobjectNormal = vec4( skinMatrix * vec4( objectNormal, 0.0 ) ).xyz;\\n\\t#ifdef USE_TANGENT\\n\\t\\tobjectTangent = vec4( skinMatrix * vec4( objectTangent, 0.0 ) ).xyz;\\n\\t#endif\\n#endif\";\n\nvar specularmap_fragment = \"float specularStrength;\\n#ifdef USE_SPECULARMAP\\n\\tvec4 texelSpecular = texture2D( specularMap, vUv );\\n\\tspecularStrength = texelSpecular.r;\\n#else\\n\\tspecularStrength = 1.0;\\n#endif\";\n\nvar specularmap_pars_fragment = \"#ifdef USE_SPECULARMAP\\n\\tuniform sampler2D specularMap;\\n#endif\";\n\nvar tonemapping_fragment = \"#if defined( TONE_MAPPING )\\n\\tgl_FragColor.rgb = toneMapping( gl_FragColor.rgb );\\n#endif\";\n\nvar tonemapping_pars_fragment = \"#ifndef saturate\\n#define saturate(a) clamp( a, 0.0, 1.0 )\\n#endif\\nuniform float toneMappingExposure;\\nvec3 LinearToneMapping( vec3 color ) {\\n\\treturn toneMappingExposure * color;\\n}\\nvec3 ReinhardToneMapping( vec3 color ) {\\n\\tcolor *= toneMappingExposure;\\n\\treturn saturate( color / ( vec3( 1.0 ) + color ) );\\n}\\nvec3 OptimizedCineonToneMapping( vec3 color ) {\\n\\tcolor *= toneMappingExposure;\\n\\tcolor = max( vec3( 0.0 ), color - 0.004 );\\n\\treturn pow( ( color * ( 6.2 * color + 0.5 ) ) / ( color * ( 6.2 * color + 1.7 ) + 0.06 ), vec3( 2.2 ) );\\n}\\nvec3 RRTAndODTFit( vec3 v ) {\\n\\tvec3 a = v * ( v + 0.0245786 ) - 0.000090537;\\n\\tvec3 b = v * ( 0.983729 * v + 0.4329510 ) + 0.238081;\\n\\treturn a / b;\\n}\\nvec3 ACESFilmicToneMapping( vec3 color ) {\\n\\tconst mat3 ACESInputMat = mat3(\\n\\t\\tvec3( 0.59719, 0.07600, 0.02840 ),\\t\\tvec3( 0.35458, 0.90834, 0.13383 ),\\n\\t\\tvec3( 0.04823, 0.01566, 0.83777 )\\n\\t);\\n\\tconst mat3 ACESOutputMat = mat3(\\n\\t\\tvec3(  1.60475, -0.10208, -0.00327 ),\\t\\tvec3( -0.53108,  1.10813, -0.07276 ),\\n\\t\\tvec3( -0.07367, -0.00605,  1.07602 )\\n\\t);\\n\\tcolor *= toneMappingExposure / 0.6;\\n\\tcolor = ACESInputMat * color;\\n\\tcolor = RRTAndODTFit( color );\\n\\tcolor = ACESOutputMat * color;\\n\\treturn saturate( color );\\n}\\nvec3 CustomToneMapping( vec3 color ) { return color; }\";\n\nvar transmissionmap_fragment = \"#ifdef USE_TRANSMISSIONMAP\\n\\ttotalTransmission *= texture2D( transmissionMap, vUv ).r;\\n#endif\";\n\nvar transmissionmap_pars_fragment = \"#ifdef USE_TRANSMISSIONMAP\\n\\tuniform sampler2D transmissionMap;\\n#endif\";\n\nvar uv_pars_fragment = \"#if ( defined( USE_UV ) && ! defined( UVS_VERTEX_ONLY ) )\\n\\tvarying vec2 vUv;\\n#endif\";\n\nvar uv_pars_vertex = \"#ifdef USE_UV\\n\\t#ifdef UVS_VERTEX_ONLY\\n\\t\\tvec2 vUv;\\n\\t#else\\n\\t\\tvarying vec2 vUv;\\n\\t#endif\\n\\tuniform mat3 uvTransform;\\n#endif\";\n\nvar uv_vertex = \"#ifdef USE_UV\\n\\tvUv = ( uvTransform * vec3( uv, 1 ) ).xy;\\n#endif\";\n\nvar uv2_pars_fragment = \"#if defined( USE_LIGHTMAP ) || defined( USE_AOMAP )\\n\\tvarying vec2 vUv2;\\n#endif\";\n\nvar uv2_pars_vertex = \"#if defined( USE_LIGHTMAP ) || defined( USE_AOMAP )\\n\\tattribute vec2 uv2;\\n\\tvarying vec2 vUv2;\\n\\tuniform mat3 uv2Transform;\\n#endif\";\n\nvar uv2_vertex = \"#if defined( USE_LIGHTMAP ) || defined( USE_AOMAP )\\n\\tvUv2 = ( uv2Transform * vec3( uv2, 1 ) ).xy;\\n#endif\";\n\nvar worldpos_vertex = \"#if defined( USE_ENVMAP ) || defined( DISTANCE ) || defined ( USE_SHADOWMAP )\\n\\tvec4 worldPosition = vec4( transformed, 1.0 );\\n\\t#ifdef USE_INSTANCING\\n\\t\\tworldPosition = instanceMatrix * worldPosition;\\n\\t#endif\\n\\tworldPosition = modelMatrix * worldPosition;\\n#endif\";\n\nvar background_frag = \"uniform sampler2D t2D;\\nvarying vec2 vUv;\\nvoid main() {\\n\\tvec4 texColor = texture2D( t2D, vUv );\\n\\tgl_FragColor = mapTexelToLinear( texColor );\\n\\t#include <tonemapping_fragment>\\n\\t#include <encodings_fragment>\\n}\";\n\nvar background_vert = \"varying vec2 vUv;\\nuniform mat3 uvTransform;\\nvoid main() {\\n\\tvUv = ( uvTransform * vec3( uv, 1 ) ).xy;\\n\\tgl_Position = vec4( position.xy, 1.0, 1.0 );\\n}\";\n\nvar cube_frag = \"#include <envmap_common_pars_fragment>\\nuniform float opacity;\\nvarying vec3 vWorldDirection;\\n#include <cube_uv_reflection_fragment>\\nvoid main() {\\n\\tvec3 vReflect = vWorldDirection;\\n\\t#include <envmap_fragment>\\n\\tgl_FragColor = envColor;\\n\\tgl_FragColor.a *= opacity;\\n\\t#include <tonemapping_fragment>\\n\\t#include <encodings_fragment>\\n}\";\n\nvar cube_vert = \"varying vec3 vWorldDirection;\\n#include <common>\\nvoid main() {\\n\\tvWorldDirection = transformDirection( position, modelMatrix );\\n\\t#include <begin_vertex>\\n\\t#include <project_vertex>\\n\\tgl_Position.z = gl_Position.w;\\n}\";\n\nvar depth_frag = \"#if DEPTH_PACKING == 3200\\n\\tuniform float opacity;\\n#endif\\n#include <common>\\n#include <packing>\\n#include <uv_pars_fragment>\\n#include <map_pars_fragment>\\n#include <alphamap_pars_fragment>\\n#include <logdepthbuf_pars_fragment>\\n#include <clipping_planes_pars_fragment>\\nvarying vec2 vHighPrecisionZW;\\nvoid main() {\\n\\t#include <clipping_planes_fragment>\\n\\tvec4 diffuseColor = vec4( 1.0 );\\n\\t#if DEPTH_PACKING == 3200\\n\\t\\tdiffuseColor.a = opacity;\\n\\t#endif\\n\\t#include <map_fragment>\\n\\t#include <alphamap_fragment>\\n\\t#include <alphatest_fragment>\\n\\t#include <logdepthbuf_fragment>\\n\\tfloat fragCoordZ = 0.5 * vHighPrecisionZW[0] / vHighPrecisionZW[1] + 0.5;\\n\\t#if DEPTH_PACKING == 3200\\n\\t\\tgl_FragColor = vec4( vec3( 1.0 - fragCoordZ ), opacity );\\n\\t#elif DEPTH_PACKING == 3201\\n\\t\\tgl_FragColor = packDepthToRGBA( fragCoordZ );\\n\\t#endif\\n}\";\n\nvar depth_vert = \"#include <common>\\n#include <uv_pars_vertex>\\n#include <displacementmap_pars_vertex>\\n#include <morphtarget_pars_vertex>\\n#include <skinning_pars_vertex>\\n#include <logdepthbuf_pars_vertex>\\n#include <clipping_planes_pars_vertex>\\nvarying vec2 vHighPrecisionZW;\\nvoid main() {\\n\\t#include <uv_vertex>\\n\\t#include <skinbase_vertex>\\n\\t#ifdef USE_DISPLACEMENTMAP\\n\\t\\t#include <beginnormal_vertex>\\n\\t\\t#include <morphnormal_vertex>\\n\\t\\t#include <skinnormal_vertex>\\n\\t#endif\\n\\t#include <begin_vertex>\\n\\t#include <morphtarget_vertex>\\n\\t#include <skinning_vertex>\\n\\t#include <displacementmap_vertex>\\n\\t#include <project_vertex>\\n\\t#include <logdepthbuf_vertex>\\n\\t#include <clipping_planes_vertex>\\n\\tvHighPrecisionZW = gl_Position.zw;\\n}\";\n\nvar distanceRGBA_frag = \"#define DISTANCE\\nuniform vec3 referencePosition;\\nuniform float nearDistance;\\nuniform float farDistance;\\nvarying vec3 vWorldPosition;\\n#include <common>\\n#include <packing>\\n#include <uv_pars_fragment>\\n#include <map_pars_fragment>\\n#include <alphamap_pars_fragment>\\n#include <clipping_planes_pars_fragment>\\nvoid main () {\\n\\t#include <clipping_planes_fragment>\\n\\tvec4 diffuseColor = vec4( 1.0 );\\n\\t#include <map_fragment>\\n\\t#include <alphamap_fragment>\\n\\t#include <alphatest_fragment>\\n\\tfloat dist = length( vWorldPosition - referencePosition );\\n\\tdist = ( dist - nearDistance ) / ( farDistance - nearDistance );\\n\\tdist = saturate( dist );\\n\\tgl_FragColor = packDepthToRGBA( dist );\\n}\";\n\nvar distanceRGBA_vert = \"#define DISTANCE\\nvarying vec3 vWorldPosition;\\n#include <common>\\n#include <uv_pars_vertex>\\n#include <displacementmap_pars_vertex>\\n#include <morphtarget_pars_vertex>\\n#include <skinning_pars_vertex>\\n#include <clipping_planes_pars_vertex>\\nvoid main() {\\n\\t#include <uv_vertex>\\n\\t#include <skinbase_vertex>\\n\\t#ifdef USE_DISPLACEMENTMAP\\n\\t\\t#include <beginnormal_vertex>\\n\\t\\t#include <morphnormal_vertex>\\n\\t\\t#include <skinnormal_vertex>\\n\\t#endif\\n\\t#include <begin_vertex>\\n\\t#include <morphtarget_vertex>\\n\\t#include <skinning_vertex>\\n\\t#include <displacementmap_vertex>\\n\\t#include <project_vertex>\\n\\t#include <worldpos_vertex>\\n\\t#include <clipping_planes_vertex>\\n\\tvWorldPosition = worldPosition.xyz;\\n}\";\n\nvar equirect_frag = \"uniform sampler2D tEquirect;\\nvarying vec3 vWorldDirection;\\n#include <common>\\nvoid main() {\\n\\tvec3 direction = normalize( vWorldDirection );\\n\\tvec2 sampleUV = equirectUv( direction );\\n\\tvec4 texColor = texture2D( tEquirect, sampleUV );\\n\\tgl_FragColor = mapTexelToLinear( texColor );\\n\\t#include <tonemapping_fragment>\\n\\t#include <encodings_fragment>\\n}\";\n\nvar equirect_vert = \"varying vec3 vWorldDirection;\\n#include <common>\\nvoid main() {\\n\\tvWorldDirection = transformDirection( position, modelMatrix );\\n\\t#include <begin_vertex>\\n\\t#include <project_vertex>\\n}\";\n\nvar linedashed_frag = \"uniform vec3 diffuse;\\nuniform float opacity;\\nuniform float dashSize;\\nuniform float totalSize;\\nvarying float vLineDistance;\\n#include <common>\\n#include <color_pars_fragment>\\n#include <fog_pars_fragment>\\n#include <logdepthbuf_pars_fragment>\\n#include <clipping_planes_pars_fragment>\\nvoid main() {\\n\\t#include <clipping_planes_fragment>\\n\\tif ( mod( vLineDistance, totalSize ) > dashSize ) {\\n\\t\\tdiscard;\\n\\t}\\n\\tvec3 outgoingLight = vec3( 0.0 );\\n\\tvec4 diffuseColor = vec4( diffuse, opacity );\\n\\t#include <logdepthbuf_fragment>\\n\\t#include <color_fragment>\\n\\toutgoingLight = diffuseColor.rgb;\\n\\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\\n\\t#include <tonemapping_fragment>\\n\\t#include <encodings_fragment>\\n\\t#include <fog_fragment>\\n\\t#include <premultiplied_alpha_fragment>\\n}\";\n\nvar linedashed_vert = \"uniform float scale;\\nattribute float lineDistance;\\nvarying float vLineDistance;\\n#include <common>\\n#include <color_pars_vertex>\\n#include <fog_pars_vertex>\\n#include <morphtarget_pars_vertex>\\n#include <logdepthbuf_pars_vertex>\\n#include <clipping_planes_pars_vertex>\\nvoid main() {\\n\\tvLineDistance = scale * lineDistance;\\n\\t#include <color_vertex>\\n\\t#include <begin_vertex>\\n\\t#include <morphtarget_vertex>\\n\\t#include <project_vertex>\\n\\t#include <logdepthbuf_vertex>\\n\\t#include <clipping_planes_vertex>\\n\\t#include <fog_vertex>\\n}\";\n\nvar meshbasic_frag = \"uniform vec3 diffuse;\\nuniform float opacity;\\n#ifndef FLAT_SHADED\\n\\tvarying vec3 vNormal;\\n#endif\\n#include <common>\\n#include <dithering_pars_fragment>\\n#include <color_pars_fragment>\\n#include <uv_pars_fragment>\\n#include <uv2_pars_fragment>\\n#include <map_pars_fragment>\\n#include <alphamap_pars_fragment>\\n#include <aomap_pars_fragment>\\n#include <lightmap_pars_fragment>\\n#include <envmap_common_pars_fragment>\\n#include <envmap_pars_fragment>\\n#include <cube_uv_reflection_fragment>\\n#include <fog_pars_fragment>\\n#include <specularmap_pars_fragment>\\n#include <logdepthbuf_pars_fragment>\\n#include <clipping_planes_pars_fragment>\\nvoid main() {\\n\\t#include <clipping_planes_fragment>\\n\\tvec4 diffuseColor = vec4( diffuse, opacity );\\n\\t#include <logdepthbuf_fragment>\\n\\t#include <map_fragment>\\n\\t#include <color_fragment>\\n\\t#include <alphamap_fragment>\\n\\t#include <alphatest_fragment>\\n\\t#include <specularmap_fragment>\\n\\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\\n\\t#ifdef USE_LIGHTMAP\\n\\t\\n\\t\\tvec4 lightMapTexel= texture2D( lightMap, vUv2 );\\n\\t\\treflectedLight.indirectDiffuse += lightMapTexelToLinear( lightMapTexel ).rgb * lightMapIntensity;\\n\\t#else\\n\\t\\treflectedLight.indirectDiffuse += vec3( 1.0 );\\n\\t#endif\\n\\t#include <aomap_fragment>\\n\\treflectedLight.indirectDiffuse *= diffuseColor.rgb;\\n\\tvec3 outgoingLight = reflectedLight.indirectDiffuse;\\n\\t#include <envmap_fragment>\\n\\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\\n\\t#include <tonemapping_fragment>\\n\\t#include <encodings_fragment>\\n\\t#include <fog_fragment>\\n\\t#include <premultiplied_alpha_fragment>\\n\\t#include <dithering_fragment>\\n}\";\n\nvar meshbasic_vert = \"#include <common>\\n#include <uv_pars_vertex>\\n#include <uv2_pars_vertex>\\n#include <envmap_pars_vertex>\\n#include <color_pars_vertex>\\n#include <fog_pars_vertex>\\n#include <morphtarget_pars_vertex>\\n#include <skinning_pars_vertex>\\n#include <logdepthbuf_pars_vertex>\\n#include <clipping_planes_pars_vertex>\\nvoid main() {\\n\\t#include <uv_vertex>\\n\\t#include <uv2_vertex>\\n\\t#include <color_vertex>\\n\\t#include <skinbase_vertex>\\n\\t#ifdef USE_ENVMAP\\n\\t#include <beginnormal_vertex>\\n\\t#include <morphnormal_vertex>\\n\\t#include <skinnormal_vertex>\\n\\t#include <defaultnormal_vertex>\\n\\t#endif\\n\\t#include <begin_vertex>\\n\\t#include <morphtarget_vertex>\\n\\t#include <skinning_vertex>\\n\\t#include <project_vertex>\\n\\t#include <logdepthbuf_vertex>\\n\\t#include <worldpos_vertex>\\n\\t#include <clipping_planes_vertex>\\n\\t#include <envmap_vertex>\\n\\t#include <fog_vertex>\\n}\";\n\nvar meshlambert_frag = \"uniform vec3 diffuse;\\nuniform vec3 emissive;\\nuniform float opacity;\\nvarying vec3 vLightFront;\\nvarying vec3 vIndirectFront;\\n#ifdef DOUBLE_SIDED\\n\\tvarying vec3 vLightBack;\\n\\tvarying vec3 vIndirectBack;\\n#endif\\n#include <common>\\n#include <packing>\\n#include <dithering_pars_fragment>\\n#include <color_pars_fragment>\\n#include <uv_pars_fragment>\\n#include <uv2_pars_fragment>\\n#include <map_pars_fragment>\\n#include <alphamap_pars_fragment>\\n#include <aomap_pars_fragment>\\n#include <lightmap_pars_fragment>\\n#include <emissivemap_pars_fragment>\\n#include <envmap_common_pars_fragment>\\n#include <envmap_pars_fragment>\\n#include <cube_uv_reflection_fragment>\\n#include <bsdfs>\\n#include <lights_pars_begin>\\n#include <fog_pars_fragment>\\n#include <shadowmap_pars_fragment>\\n#include <shadowmask_pars_fragment>\\n#include <specularmap_pars_fragment>\\n#include <logdepthbuf_pars_fragment>\\n#include <clipping_planes_pars_fragment>\\nvoid main() {\\n\\t#include <clipping_planes_fragment>\\n\\tvec4 diffuseColor = vec4( diffuse, opacity );\\n\\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\\n\\tvec3 totalEmissiveRadiance = emissive;\\n\\t#include <logdepthbuf_fragment>\\n\\t#include <map_fragment>\\n\\t#include <color_fragment>\\n\\t#include <alphamap_fragment>\\n\\t#include <alphatest_fragment>\\n\\t#include <specularmap_fragment>\\n\\t#include <emissivemap_fragment>\\n\\t#ifdef DOUBLE_SIDED\\n\\t\\treflectedLight.indirectDiffuse += ( gl_FrontFacing ) ? vIndirectFront : vIndirectBack;\\n\\t#else\\n\\t\\treflectedLight.indirectDiffuse += vIndirectFront;\\n\\t#endif\\n\\t#include <lightmap_fragment>\\n\\treflectedLight.indirectDiffuse *= BRDF_Diffuse_Lambert( diffuseColor.rgb );\\n\\t#ifdef DOUBLE_SIDED\\n\\t\\treflectedLight.directDiffuse = ( gl_FrontFacing ) ? vLightFront : vLightBack;\\n\\t#else\\n\\t\\treflectedLight.directDiffuse = vLightFront;\\n\\t#endif\\n\\treflectedLight.directDiffuse *= BRDF_Diffuse_Lambert( diffuseColor.rgb ) * getShadowMask();\\n\\t#include <aomap_fragment>\\n\\tvec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + totalEmissiveRadiance;\\n\\t#include <envmap_fragment>\\n\\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\\n\\t#include <tonemapping_fragment>\\n\\t#include <encodings_fragment>\\n\\t#include <fog_fragment>\\n\\t#include <premultiplied_alpha_fragment>\\n\\t#include <dithering_fragment>\\n}\";\n\nvar meshlambert_vert = \"#define LAMBERT\\nvarying vec3 vLightFront;\\nvarying vec3 vIndirectFront;\\n#ifdef DOUBLE_SIDED\\n\\tvarying vec3 vLightBack;\\n\\tvarying vec3 vIndirectBack;\\n#endif\\n#include <common>\\n#include <uv_pars_vertex>\\n#include <uv2_pars_vertex>\\n#include <envmap_pars_vertex>\\n#include <bsdfs>\\n#include <lights_pars_begin>\\n#include <color_pars_vertex>\\n#include <fog_pars_vertex>\\n#include <morphtarget_pars_vertex>\\n#include <skinning_pars_vertex>\\n#include <shadowmap_pars_vertex>\\n#include <logdepthbuf_pars_vertex>\\n#include <clipping_planes_pars_vertex>\\nvoid main() {\\n\\t#include <uv_vertex>\\n\\t#include <uv2_vertex>\\n\\t#include <color_vertex>\\n\\t#include <beginnormal_vertex>\\n\\t#include <morphnormal_vertex>\\n\\t#include <skinbase_vertex>\\n\\t#include <skinnormal_vertex>\\n\\t#include <defaultnormal_vertex>\\n\\t#include <begin_vertex>\\n\\t#include <morphtarget_vertex>\\n\\t#include <skinning_vertex>\\n\\t#include <project_vertex>\\n\\t#include <logdepthbuf_vertex>\\n\\t#include <clipping_planes_vertex>\\n\\t#include <worldpos_vertex>\\n\\t#include <envmap_vertex>\\n\\t#include <lights_lambert_vertex>\\n\\t#include <shadowmap_vertex>\\n\\t#include <fog_vertex>\\n}\";\n\nvar meshmatcap_frag = \"#define MATCAP\\nuniform vec3 diffuse;\\nuniform float opacity;\\nuniform sampler2D matcap;\\nvarying vec3 vViewPosition;\\n#ifndef FLAT_SHADED\\n\\tvarying vec3 vNormal;\\n#endif\\n#include <common>\\n#include <dithering_pars_fragment>\\n#include <color_pars_fragment>\\n#include <uv_pars_fragment>\\n#include <map_pars_fragment>\\n#include <alphamap_pars_fragment>\\n#include <fog_pars_fragment>\\n#include <bumpmap_pars_fragment>\\n#include <normalmap_pars_fragment>\\n#include <logdepthbuf_pars_fragment>\\n#include <clipping_planes_pars_fragment>\\nvoid main() {\\n\\t#include <clipping_planes_fragment>\\n\\tvec4 diffuseColor = vec4( diffuse, opacity );\\n\\t#include <logdepthbuf_fragment>\\n\\t#include <map_fragment>\\n\\t#include <color_fragment>\\n\\t#include <alphamap_fragment>\\n\\t#include <alphatest_fragment>\\n\\t#include <normal_fragment_begin>\\n\\t#include <normal_fragment_maps>\\n\\tvec3 viewDir = normalize( vViewPosition );\\n\\tvec3 x = normalize( vec3( viewDir.z, 0.0, - viewDir.x ) );\\n\\tvec3 y = cross( viewDir, x );\\n\\tvec2 uv = vec2( dot( x, normal ), dot( y, normal ) ) * 0.495 + 0.5;\\n\\t#ifdef USE_MATCAP\\n\\t\\tvec4 matcapColor = texture2D( matcap, uv );\\n\\t\\tmatcapColor = matcapTexelToLinear( matcapColor );\\n\\t#else\\n\\t\\tvec4 matcapColor = vec4( 1.0 );\\n\\t#endif\\n\\tvec3 outgoingLight = diffuseColor.rgb * matcapColor.rgb;\\n\\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\\n\\t#include <tonemapping_fragment>\\n\\t#include <encodings_fragment>\\n\\t#include <fog_fragment>\\n\\t#include <premultiplied_alpha_fragment>\\n\\t#include <dithering_fragment>\\n}\";\n\nvar meshmatcap_vert = \"#define MATCAP\\nvarying vec3 vViewPosition;\\n#ifndef FLAT_SHADED\\n\\tvarying vec3 vNormal;\\n#endif\\n#include <common>\\n#include <uv_pars_vertex>\\n#include <color_pars_vertex>\\n#include <displacementmap_pars_vertex>\\n#include <fog_pars_vertex>\\n#include <morphtarget_pars_vertex>\\n#include <skinning_pars_vertex>\\n#include <logdepthbuf_pars_vertex>\\n#include <clipping_planes_pars_vertex>\\nvoid main() {\\n\\t#include <uv_vertex>\\n\\t#include <color_vertex>\\n\\t#include <beginnormal_vertex>\\n\\t#include <morphnormal_vertex>\\n\\t#include <skinbase_vertex>\\n\\t#include <skinnormal_vertex>\\n\\t#include <defaultnormal_vertex>\\n\\t#ifndef FLAT_SHADED\\n\\t\\tvNormal = normalize( transformedNormal );\\n\\t#endif\\n\\t#include <begin_vertex>\\n\\t#include <morphtarget_vertex>\\n\\t#include <skinning_vertex>\\n\\t#include <displacementmap_vertex>\\n\\t#include <project_vertex>\\n\\t#include <logdepthbuf_vertex>\\n\\t#include <clipping_planes_vertex>\\n\\t#include <fog_vertex>\\n\\tvViewPosition = - mvPosition.xyz;\\n}\";\n\nvar meshtoon_frag = \"#define TOON\\nuniform vec3 diffuse;\\nuniform vec3 emissive;\\nuniform float opacity;\\n#include <common>\\n#include <packing>\\n#include <dithering_pars_fragment>\\n#include <color_pars_fragment>\\n#include <uv_pars_fragment>\\n#include <uv2_pars_fragment>\\n#include <map_pars_fragment>\\n#include <alphamap_pars_fragment>\\n#include <aomap_pars_fragment>\\n#include <lightmap_pars_fragment>\\n#include <emissivemap_pars_fragment>\\n#include <gradientmap_pars_fragment>\\n#include <fog_pars_fragment>\\n#include <bsdfs>\\n#include <lights_pars_begin>\\n#include <lights_toon_pars_fragment>\\n#include <shadowmap_pars_fragment>\\n#include <bumpmap_pars_fragment>\\n#include <normalmap_pars_fragment>\\n#include <logdepthbuf_pars_fragment>\\n#include <clipping_planes_pars_fragment>\\nvoid main() {\\n\\t#include <clipping_planes_fragment>\\n\\tvec4 diffuseColor = vec4( diffuse, opacity );\\n\\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\\n\\tvec3 totalEmissiveRadiance = emissive;\\n\\t#include <logdepthbuf_fragment>\\n\\t#include <map_fragment>\\n\\t#include <color_fragment>\\n\\t#include <alphamap_fragment>\\n\\t#include <alphatest_fragment>\\n\\t#include <normal_fragment_begin>\\n\\t#include <normal_fragment_maps>\\n\\t#include <emissivemap_fragment>\\n\\t#include <lights_toon_fragment>\\n\\t#include <lights_fragment_begin>\\n\\t#include <lights_fragment_maps>\\n\\t#include <lights_fragment_end>\\n\\t#include <aomap_fragment>\\n\\tvec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + totalEmissiveRadiance;\\n\\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\\n\\t#include <tonemapping_fragment>\\n\\t#include <encodings_fragment>\\n\\t#include <fog_fragment>\\n\\t#include <premultiplied_alpha_fragment>\\n\\t#include <dithering_fragment>\\n}\";\n\nvar meshtoon_vert = \"#define TOON\\nvarying vec3 vViewPosition;\\n#ifndef FLAT_SHADED\\n\\tvarying vec3 vNormal;\\n#endif\\n#include <common>\\n#include <uv_pars_vertex>\\n#include <uv2_pars_vertex>\\n#include <displacementmap_pars_vertex>\\n#include <color_pars_vertex>\\n#include <fog_pars_vertex>\\n#include <morphtarget_pars_vertex>\\n#include <skinning_pars_vertex>\\n#include <shadowmap_pars_vertex>\\n#include <logdepthbuf_pars_vertex>\\n#include <clipping_planes_pars_vertex>\\nvoid main() {\\n\\t#include <uv_vertex>\\n\\t#include <uv2_vertex>\\n\\t#include <color_vertex>\\n\\t#include <beginnormal_vertex>\\n\\t#include <morphnormal_vertex>\\n\\t#include <skinbase_vertex>\\n\\t#include <skinnormal_vertex>\\n\\t#include <defaultnormal_vertex>\\n#ifndef FLAT_SHADED\\n\\tvNormal = normalize( transformedNormal );\\n#endif\\n\\t#include <begin_vertex>\\n\\t#include <morphtarget_vertex>\\n\\t#include <skinning_vertex>\\n\\t#include <displacementmap_vertex>\\n\\t#include <project_vertex>\\n\\t#include <logdepthbuf_vertex>\\n\\t#include <clipping_planes_vertex>\\n\\tvViewPosition = - mvPosition.xyz;\\n\\t#include <worldpos_vertex>\\n\\t#include <shadowmap_vertex>\\n\\t#include <fog_vertex>\\n}\";\n\nvar meshphong_frag = \"#define PHONG\\nuniform vec3 diffuse;\\nuniform vec3 emissive;\\nuniform vec3 specular;\\nuniform float shininess;\\nuniform float opacity;\\n#include <common>\\n#include <packing>\\n#include <dithering_pars_fragment>\\n#include <color_pars_fragment>\\n#include <uv_pars_fragment>\\n#include <uv2_pars_fragment>\\n#include <map_pars_fragment>\\n#include <alphamap_pars_fragment>\\n#include <aomap_pars_fragment>\\n#include <lightmap_pars_fragment>\\n#include <emissivemap_pars_fragment>\\n#include <envmap_common_pars_fragment>\\n#include <envmap_pars_fragment>\\n#include <cube_uv_reflection_fragment>\\n#include <fog_pars_fragment>\\n#include <bsdfs>\\n#include <lights_pars_begin>\\n#include <lights_phong_pars_fragment>\\n#include <shadowmap_pars_fragment>\\n#include <bumpmap_pars_fragment>\\n#include <normalmap_pars_fragment>\\n#include <specularmap_pars_fragment>\\n#include <logdepthbuf_pars_fragment>\\n#include <clipping_planes_pars_fragment>\\nvoid main() {\\n\\t#include <clipping_planes_fragment>\\n\\tvec4 diffuseColor = vec4( diffuse, opacity );\\n\\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\\n\\tvec3 totalEmissiveRadiance = emissive;\\n\\t#include <logdepthbuf_fragment>\\n\\t#include <map_fragment>\\n\\t#include <color_fragment>\\n\\t#include <alphamap_fragment>\\n\\t#include <alphatest_fragment>\\n\\t#include <specularmap_fragment>\\n\\t#include <normal_fragment_begin>\\n\\t#include <normal_fragment_maps>\\n\\t#include <emissivemap_fragment>\\n\\t#include <lights_phong_fragment>\\n\\t#include <lights_fragment_begin>\\n\\t#include <lights_fragment_maps>\\n\\t#include <lights_fragment_end>\\n\\t#include <aomap_fragment>\\n\\tvec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + reflectedLight.directSpecular + reflectedLight.indirectSpecular + totalEmissiveRadiance;\\n\\t#include <envmap_fragment>\\n\\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\\n\\t#include <tonemapping_fragment>\\n\\t#include <encodings_fragment>\\n\\t#include <fog_fragment>\\n\\t#include <premultiplied_alpha_fragment>\\n\\t#include <dithering_fragment>\\n}\";\n\nvar meshphong_vert = \"#define PHONG\\nvarying vec3 vViewPosition;\\n#ifndef FLAT_SHADED\\n\\tvarying vec3 vNormal;\\n#endif\\n#include <common>\\n#include <uv_pars_vertex>\\n#include <uv2_pars_vertex>\\n#include <displacementmap_pars_vertex>\\n#include <envmap_pars_vertex>\\n#include <color_pars_vertex>\\n#include <fog_pars_vertex>\\n#include <morphtarget_pars_vertex>\\n#include <skinning_pars_vertex>\\n#include <shadowmap_pars_vertex>\\n#include <logdepthbuf_pars_vertex>\\n#include <clipping_planes_pars_vertex>\\nvoid main() {\\n\\t#include <uv_vertex>\\n\\t#include <uv2_vertex>\\n\\t#include <color_vertex>\\n\\t#include <beginnormal_vertex>\\n\\t#include <morphnormal_vertex>\\n\\t#include <skinbase_vertex>\\n\\t#include <skinnormal_vertex>\\n\\t#include <defaultnormal_vertex>\\n#ifndef FLAT_SHADED\\n\\tvNormal = normalize( transformedNormal );\\n#endif\\n\\t#include <begin_vertex>\\n\\t#include <morphtarget_vertex>\\n\\t#include <skinning_vertex>\\n\\t#include <displacementmap_vertex>\\n\\t#include <project_vertex>\\n\\t#include <logdepthbuf_vertex>\\n\\t#include <clipping_planes_vertex>\\n\\tvViewPosition = - mvPosition.xyz;\\n\\t#include <worldpos_vertex>\\n\\t#include <envmap_vertex>\\n\\t#include <shadowmap_vertex>\\n\\t#include <fog_vertex>\\n}\";\n\nvar meshphysical_frag = \"#define STANDARD\\n#ifdef PHYSICAL\\n\\t#define REFLECTIVITY\\n\\t#define CLEARCOAT\\n\\t#define TRANSMISSION\\n#endif\\nuniform vec3 diffuse;\\nuniform vec3 emissive;\\nuniform float roughness;\\nuniform float metalness;\\nuniform float opacity;\\n#ifdef TRANSMISSION\\n\\tuniform float transmission;\\n#endif\\n#ifdef REFLECTIVITY\\n\\tuniform float reflectivity;\\n#endif\\n#ifdef CLEARCOAT\\n\\tuniform float clearcoat;\\n\\tuniform float clearcoatRoughness;\\n#endif\\n#ifdef USE_SHEEN\\n\\tuniform vec3 sheen;\\n#endif\\nvarying vec3 vViewPosition;\\n#ifndef FLAT_SHADED\\n\\tvarying vec3 vNormal;\\n\\t#ifdef USE_TANGENT\\n\\t\\tvarying vec3 vTangent;\\n\\t\\tvarying vec3 vBitangent;\\n\\t#endif\\n#endif\\n#include <common>\\n#include <packing>\\n#include <dithering_pars_fragment>\\n#include <color_pars_fragment>\\n#include <uv_pars_fragment>\\n#include <uv2_pars_fragment>\\n#include <map_pars_fragment>\\n#include <alphamap_pars_fragment>\\n#include <aomap_pars_fragment>\\n#include <lightmap_pars_fragment>\\n#include <emissivemap_pars_fragment>\\n#include <transmissionmap_pars_fragment>\\n#include <bsdfs>\\n#include <cube_uv_reflection_fragment>\\n#include <envmap_common_pars_fragment>\\n#include <envmap_physical_pars_fragment>\\n#include <fog_pars_fragment>\\n#include <lights_pars_begin>\\n#include <lights_physical_pars_fragment>\\n#include <shadowmap_pars_fragment>\\n#include <bumpmap_pars_fragment>\\n#include <normalmap_pars_fragment>\\n#include <clearcoat_pars_fragment>\\n#include <roughnessmap_pars_fragment>\\n#include <metalnessmap_pars_fragment>\\n#include <logdepthbuf_pars_fragment>\\n#include <clipping_planes_pars_fragment>\\nvoid main() {\\n\\t#include <clipping_planes_fragment>\\n\\tvec4 diffuseColor = vec4( diffuse, opacity );\\n\\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\\n\\tvec3 totalEmissiveRadiance = emissive;\\n\\t#ifdef TRANSMISSION\\n\\t\\tfloat totalTransmission = transmission;\\n\\t#endif\\n\\t#include <logdepthbuf_fragment>\\n\\t#include <map_fragment>\\n\\t#include <color_fragment>\\n\\t#include <alphamap_fragment>\\n\\t#include <alphatest_fragment>\\n\\t#include <roughnessmap_fragment>\\n\\t#include <metalnessmap_fragment>\\n\\t#include <normal_fragment_begin>\\n\\t#include <normal_fragment_maps>\\n\\t#include <clearcoat_normal_fragment_begin>\\n\\t#include <clearcoat_normal_fragment_maps>\\n\\t#include <emissivemap_fragment>\\n\\t#include <transmissionmap_fragment>\\n\\t#include <lights_physical_fragment>\\n\\t#include <lights_fragment_begin>\\n\\t#include <lights_fragment_maps>\\n\\t#include <lights_fragment_end>\\n\\t#include <aomap_fragment>\\n\\tvec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + reflectedLight.directSpecular + reflectedLight.indirectSpecular + totalEmissiveRadiance;\\n\\t#ifdef TRANSMISSION\\n\\t\\tdiffuseColor.a *= mix( saturate( 1. - totalTransmission + linearToRelativeLuminance( reflectedLight.directSpecular + reflectedLight.indirectSpecular ) ), 1.0, metalness );\\n\\t#endif\\n\\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\\n\\t#include <tonemapping_fragment>\\n\\t#include <encodings_fragment>\\n\\t#include <fog_fragment>\\n\\t#include <premultiplied_alpha_fragment>\\n\\t#include <dithering_fragment>\\n}\";\n\nvar meshphysical_vert = \"#define STANDARD\\nvarying vec3 vViewPosition;\\n#ifndef FLAT_SHADED\\n\\tvarying vec3 vNormal;\\n\\t#ifdef USE_TANGENT\\n\\t\\tvarying vec3 vTangent;\\n\\t\\tvarying vec3 vBitangent;\\n\\t#endif\\n#endif\\n#include <common>\\n#include <uv_pars_vertex>\\n#include <uv2_pars_vertex>\\n#include <displacementmap_pars_vertex>\\n#include <color_pars_vertex>\\n#include <fog_pars_vertex>\\n#include <morphtarget_pars_vertex>\\n#include <skinning_pars_vertex>\\n#include <shadowmap_pars_vertex>\\n#include <logdepthbuf_pars_vertex>\\n#include <clipping_planes_pars_vertex>\\nvoid main() {\\n\\t#include <uv_vertex>\\n\\t#include <uv2_vertex>\\n\\t#include <color_vertex>\\n\\t#include <beginnormal_vertex>\\n\\t#include <morphnormal_vertex>\\n\\t#include <skinbase_vertex>\\n\\t#include <skinnormal_vertex>\\n\\t#include <defaultnormal_vertex>\\n#ifndef FLAT_SHADED\\n\\tvNormal = normalize( transformedNormal );\\n\\t#ifdef USE_TANGENT\\n\\t\\tvTangent = normalize( transformedTangent );\\n\\t\\tvBitangent = normalize( cross( vNormal, vTangent ) * tangent.w );\\n\\t#endif\\n#endif\\n\\t#include <begin_vertex>\\n\\t#include <morphtarget_vertex>\\n\\t#include <skinning_vertex>\\n\\t#include <displacementmap_vertex>\\n\\t#include <project_vertex>\\n\\t#include <logdepthbuf_vertex>\\n\\t#include <clipping_planes_vertex>\\n\\tvViewPosition = - mvPosition.xyz;\\n\\t#include <worldpos_vertex>\\n\\t#include <shadowmap_vertex>\\n\\t#include <fog_vertex>\\n}\";\n\nvar normal_frag = \"#define NORMAL\\nuniform float opacity;\\n#if defined( FLAT_SHADED ) || defined( USE_BUMPMAP ) || defined( TANGENTSPACE_NORMALMAP )\\n\\tvarying vec3 vViewPosition;\\n#endif\\n#ifndef FLAT_SHADED\\n\\tvarying vec3 vNormal;\\n\\t#ifdef USE_TANGENT\\n\\t\\tvarying vec3 vTangent;\\n\\t\\tvarying vec3 vBitangent;\\n\\t#endif\\n#endif\\n#include <packing>\\n#include <uv_pars_fragment>\\n#include <bumpmap_pars_fragment>\\n#include <normalmap_pars_fragment>\\n#include <logdepthbuf_pars_fragment>\\n#include <clipping_planes_pars_fragment>\\nvoid main() {\\n\\t#include <clipping_planes_fragment>\\n\\t#include <logdepthbuf_fragment>\\n\\t#include <normal_fragment_begin>\\n\\t#include <normal_fragment_maps>\\n\\tgl_FragColor = vec4( packNormalToRGB( normal ), opacity );\\n}\";\n\nvar normal_vert = \"#define NORMAL\\n#if defined( FLAT_SHADED ) || defined( USE_BUMPMAP ) || defined( TANGENTSPACE_NORMALMAP )\\n\\tvarying vec3 vViewPosition;\\n#endif\\n#ifndef FLAT_SHADED\\n\\tvarying vec3 vNormal;\\n\\t#ifdef USE_TANGENT\\n\\t\\tvarying vec3 vTangent;\\n\\t\\tvarying vec3 vBitangent;\\n\\t#endif\\n#endif\\n#include <common>\\n#include <uv_pars_vertex>\\n#include <displacementmap_pars_vertex>\\n#include <morphtarget_pars_vertex>\\n#include <skinning_pars_vertex>\\n#include <logdepthbuf_pars_vertex>\\n#include <clipping_planes_pars_vertex>\\nvoid main() {\\n\\t#include <uv_vertex>\\n\\t#include <beginnormal_vertex>\\n\\t#include <morphnormal_vertex>\\n\\t#include <skinbase_vertex>\\n\\t#include <skinnormal_vertex>\\n\\t#include <defaultnormal_vertex>\\n#ifndef FLAT_SHADED\\n\\tvNormal = normalize( transformedNormal );\\n\\t#ifdef USE_TANGENT\\n\\t\\tvTangent = normalize( transformedTangent );\\n\\t\\tvBitangent = normalize( cross( vNormal, vTangent ) * tangent.w );\\n\\t#endif\\n#endif\\n\\t#include <begin_vertex>\\n\\t#include <morphtarget_vertex>\\n\\t#include <skinning_vertex>\\n\\t#include <displacementmap_vertex>\\n\\t#include <project_vertex>\\n\\t#include <logdepthbuf_vertex>\\n\\t#include <clipping_planes_vertex>\\n#if defined( FLAT_SHADED ) || defined( USE_BUMPMAP ) || defined( TANGENTSPACE_NORMALMAP )\\n\\tvViewPosition = - mvPosition.xyz;\\n#endif\\n}\";\n\nvar points_frag = \"uniform vec3 diffuse;\\nuniform float opacity;\\n#include <common>\\n#include <color_pars_fragment>\\n#include <map_particle_pars_fragment>\\n#include <fog_pars_fragment>\\n#include <logdepthbuf_pars_fragment>\\n#include <clipping_planes_pars_fragment>\\nvoid main() {\\n\\t#include <clipping_planes_fragment>\\n\\tvec3 outgoingLight = vec3( 0.0 );\\n\\tvec4 diffuseColor = vec4( diffuse, opacity );\\n\\t#include <logdepthbuf_fragment>\\n\\t#include <map_particle_fragment>\\n\\t#include <color_fragment>\\n\\t#include <alphatest_fragment>\\n\\toutgoingLight = diffuseColor.rgb;\\n\\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\\n\\t#include <tonemapping_fragment>\\n\\t#include <encodings_fragment>\\n\\t#include <fog_fragment>\\n\\t#include <premultiplied_alpha_fragment>\\n}\";\n\nvar points_vert = \"uniform float size;\\nuniform float scale;\\n#include <common>\\n#include <color_pars_vertex>\\n#include <fog_pars_vertex>\\n#include <morphtarget_pars_vertex>\\n#include <logdepthbuf_pars_vertex>\\n#include <clipping_planes_pars_vertex>\\nvoid main() {\\n\\t#include <color_vertex>\\n\\t#include <begin_vertex>\\n\\t#include <morphtarget_vertex>\\n\\t#include <project_vertex>\\n\\tgl_PointSize = size;\\n\\t#ifdef USE_SIZEATTENUATION\\n\\t\\tbool isPerspective = isPerspectiveMatrix( projectionMatrix );\\n\\t\\tif ( isPerspective ) gl_PointSize *= ( scale / - mvPosition.z );\\n\\t#endif\\n\\t#include <logdepthbuf_vertex>\\n\\t#include <clipping_planes_vertex>\\n\\t#include <worldpos_vertex>\\n\\t#include <fog_vertex>\\n}\";\n\nvar shadow_frag = \"uniform vec3 color;\\nuniform float opacity;\\n#include <common>\\n#include <packing>\\n#include <fog_pars_fragment>\\n#include <bsdfs>\\n#include <lights_pars_begin>\\n#include <shadowmap_pars_fragment>\\n#include <shadowmask_pars_fragment>\\nvoid main() {\\n\\tgl_FragColor = vec4( color, opacity * ( 1.0 - getShadowMask() ) );\\n\\t#include <tonemapping_fragment>\\n\\t#include <encodings_fragment>\\n\\t#include <fog_fragment>\\n}\";\n\nvar shadow_vert = \"#include <common>\\n#include <fog_pars_vertex>\\n#include <shadowmap_pars_vertex>\\nvoid main() {\\n\\t#include <begin_vertex>\\n\\t#include <project_vertex>\\n\\t#include <worldpos_vertex>\\n\\t#include <beginnormal_vertex>\\n\\t#include <morphnormal_vertex>\\n\\t#include <skinbase_vertex>\\n\\t#include <skinnormal_vertex>\\n\\t#include <defaultnormal_vertex>\\n\\t#include <shadowmap_vertex>\\n\\t#include <fog_vertex>\\n}\";\n\nvar sprite_frag = \"uniform vec3 diffuse;\\nuniform float opacity;\\n#include <common>\\n#include <uv_pars_fragment>\\n#include <map_pars_fragment>\\n#include <alphamap_pars_fragment>\\n#include <fog_pars_fragment>\\n#include <logdepthbuf_pars_fragment>\\n#include <clipping_planes_pars_fragment>\\nvoid main() {\\n\\t#include <clipping_planes_fragment>\\n\\tvec3 outgoingLight = vec3( 0.0 );\\n\\tvec4 diffuseColor = vec4( diffuse, opacity );\\n\\t#include <logdepthbuf_fragment>\\n\\t#include <map_fragment>\\n\\t#include <alphamap_fragment>\\n\\t#include <alphatest_fragment>\\n\\toutgoingLight = diffuseColor.rgb;\\n\\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\\n\\t#include <tonemapping_fragment>\\n\\t#include <encodings_fragment>\\n\\t#include <fog_fragment>\\n}\";\n\nvar sprite_vert = \"uniform float rotation;\\nuniform vec2 center;\\n#include <common>\\n#include <uv_pars_vertex>\\n#include <fog_pars_vertex>\\n#include <logdepthbuf_pars_vertex>\\n#include <clipping_planes_pars_vertex>\\nvoid main() {\\n\\t#include <uv_vertex>\\n\\tvec4 mvPosition = modelViewMatrix * vec4( 0.0, 0.0, 0.0, 1.0 );\\n\\tvec2 scale;\\n\\tscale.x = length( vec3( modelMatrix[ 0 ].x, modelMatrix[ 0 ].y, modelMatrix[ 0 ].z ) );\\n\\tscale.y = length( vec3( modelMatrix[ 1 ].x, modelMatrix[ 1 ].y, modelMatrix[ 1 ].z ) );\\n\\t#ifndef USE_SIZEATTENUATION\\n\\t\\tbool isPerspective = isPerspectiveMatrix( projectionMatrix );\\n\\t\\tif ( isPerspective ) scale *= - mvPosition.z;\\n\\t#endif\\n\\tvec2 alignedPosition = ( position.xy - ( center - vec2( 0.5 ) ) ) * scale;\\n\\tvec2 rotatedPosition;\\n\\trotatedPosition.x = cos( rotation ) * alignedPosition.x - sin( rotation ) * alignedPosition.y;\\n\\trotatedPosition.y = sin( rotation ) * alignedPosition.x + cos( rotation ) * alignedPosition.y;\\n\\tmvPosition.xy += rotatedPosition;\\n\\tgl_Position = projectionMatrix * mvPosition;\\n\\t#include <logdepthbuf_vertex>\\n\\t#include <clipping_planes_vertex>\\n\\t#include <fog_vertex>\\n}\";\n\nconst ShaderChunk = {\n\talphamap_fragment: alphamap_fragment,\n\talphamap_pars_fragment: alphamap_pars_fragment,\n\talphatest_fragment: alphatest_fragment,\n\taomap_fragment: aomap_fragment,\n\taomap_pars_fragment: aomap_pars_fragment,\n\tbegin_vertex: begin_vertex,\n\tbeginnormal_vertex: beginnormal_vertex,\n\tbsdfs: bsdfs,\n\tbumpmap_pars_fragment: bumpmap_pars_fragment,\n\tclipping_planes_fragment: clipping_planes_fragment,\n\tclipping_planes_pars_fragment: clipping_planes_pars_fragment,\n\tclipping_planes_pars_vertex: clipping_planes_pars_vertex,\n\tclipping_planes_vertex: clipping_planes_vertex,\n\tcolor_fragment: color_fragment,\n\tcolor_pars_fragment: color_pars_fragment,\n\tcolor_pars_vertex: color_pars_vertex,\n\tcolor_vertex: color_vertex,\n\tcommon: common,\n\tcube_uv_reflection_fragment: cube_uv_reflection_fragment,\n\tdefaultnormal_vertex: defaultnormal_vertex,\n\tdisplacementmap_pars_vertex: displacementmap_pars_vertex,\n\tdisplacementmap_vertex: displacementmap_vertex,\n\temissivemap_fragment: emissivemap_fragment,\n\temissivemap_pars_fragment: emissivemap_pars_fragment,\n\tencodings_fragment: encodings_fragment,\n\tencodings_pars_fragment: encodings_pars_fragment,\n\tenvmap_fragment: envmap_fragment,\n\tenvmap_common_pars_fragment: envmap_common_pars_fragment,\n\tenvmap_pars_fragment: envmap_pars_fragment,\n\tenvmap_pars_vertex: envmap_pars_vertex,\n\tenvmap_physical_pars_fragment: envmap_physical_pars_fragment,\n\tenvmap_vertex: envmap_vertex,\n\tfog_vertex: fog_vertex,\n\tfog_pars_vertex: fog_pars_vertex,\n\tfog_fragment: fog_fragment,\n\tfog_pars_fragment: fog_pars_fragment,\n\tgradientmap_pars_fragment: gradientmap_pars_fragment,\n\tlightmap_fragment: lightmap_fragment,\n\tlightmap_pars_fragment: lightmap_pars_fragment,\n\tlights_lambert_vertex: lights_lambert_vertex,\n\tlights_pars_begin: lights_pars_begin,\n\tlights_toon_fragment: lights_toon_fragment,\n\tlights_toon_pars_fragment: lights_toon_pars_fragment,\n\tlights_phong_fragment: lights_phong_fragment,\n\tlights_phong_pars_fragment: lights_phong_pars_fragment,\n\tlights_physical_fragment: lights_physical_fragment,\n\tlights_physical_pars_fragment: lights_physical_pars_fragment,\n\tlights_fragment_begin: lights_fragment_begin,\n\tlights_fragment_maps: lights_fragment_maps,\n\tlights_fragment_end: lights_fragment_end,\n\tlogdepthbuf_fragment: logdepthbuf_fragment,\n\tlogdepthbuf_pars_fragment: logdepthbuf_pars_fragment,\n\tlogdepthbuf_pars_vertex: logdepthbuf_pars_vertex,\n\tlogdepthbuf_vertex: logdepthbuf_vertex,\n\tmap_fragment: map_fragment,\n\tmap_pars_fragment: map_pars_fragment,\n\tmap_particle_fragment: map_particle_fragment,\n\tmap_particle_pars_fragment: map_particle_pars_fragment,\n\tmetalnessmap_fragment: metalnessmap_fragment,\n\tmetalnessmap_pars_fragment: metalnessmap_pars_fragment,\n\tmorphnormal_vertex: morphnormal_vertex,\n\tmorphtarget_pars_vertex: morphtarget_pars_vertex,\n\tmorphtarget_vertex: morphtarget_vertex,\n\tnormal_fragment_begin: normal_fragment_begin,\n\tnormal_fragment_maps: normal_fragment_maps,\n\tnormalmap_pars_fragment: normalmap_pars_fragment,\n\tclearcoat_normal_fragment_begin: clearcoat_normal_fragment_begin,\n\tclearcoat_normal_fragment_maps: clearcoat_normal_fragment_maps,\n\tclearcoat_pars_fragment: clearcoat_pars_fragment,\n\tpacking: packing,\n\tpremultiplied_alpha_fragment: premultiplied_alpha_fragment,\n\tproject_vertex: project_vertex,\n\tdithering_fragment: dithering_fragment,\n\tdithering_pars_fragment: dithering_pars_fragment,\n\troughnessmap_fragment: roughnessmap_fragment,\n\troughnessmap_pars_fragment: roughnessmap_pars_fragment,\n\tshadowmap_pars_fragment: shadowmap_pars_fragment,\n\tshadowmap_pars_vertex: shadowmap_pars_vertex,\n\tshadowmap_vertex: shadowmap_vertex,\n\tshadowmask_pars_fragment: shadowmask_pars_fragment,\n\tskinbase_vertex: skinbase_vertex,\n\tskinning_pars_vertex: skinning_pars_vertex,\n\tskinning_vertex: skinning_vertex,\n\tskinnormal_vertex: skinnormal_vertex,\n\tspecularmap_fragment: specularmap_fragment,\n\tspecularmap_pars_fragment: specularmap_pars_fragment,\n\ttonemapping_fragment: tonemapping_fragment,\n\ttonemapping_pars_fragment: tonemapping_pars_fragment,\n\ttransmissionmap_fragment: transmissionmap_fragment,\n\ttransmissionmap_pars_fragment: transmissionmap_pars_fragment,\n\tuv_pars_fragment: uv_pars_fragment,\n\tuv_pars_vertex: uv_pars_vertex,\n\tuv_vertex: uv_vertex,\n\tuv2_pars_fragment: uv2_pars_fragment,\n\tuv2_pars_vertex: uv2_pars_vertex,\n\tuv2_vertex: uv2_vertex,\n\tworldpos_vertex: worldpos_vertex,\n\n\tbackground_frag: background_frag,\n\tbackground_vert: background_vert,\n\tcube_frag: cube_frag,\n\tcube_vert: cube_vert,\n\tdepth_frag: depth_frag,\n\tdepth_vert: depth_vert,\n\tdistanceRGBA_frag: distanceRGBA_frag,\n\tdistanceRGBA_vert: distanceRGBA_vert,\n\tequirect_frag: equirect_frag,\n\tequirect_vert: equirect_vert,\n\tlinedashed_frag: linedashed_frag,\n\tlinedashed_vert: linedashed_vert,\n\tmeshbasic_frag: meshbasic_frag,\n\tmeshbasic_vert: meshbasic_vert,\n\tmeshlambert_frag: meshlambert_frag,\n\tmeshlambert_vert: meshlambert_vert,\n\tmeshmatcap_frag: meshmatcap_frag,\n\tmeshmatcap_vert: meshmatcap_vert,\n\tmeshtoon_frag: meshtoon_frag,\n\tmeshtoon_vert: meshtoon_vert,\n\tmeshphong_frag: meshphong_frag,\n\tmeshphong_vert: meshphong_vert,\n\tmeshphysical_frag: meshphysical_frag,\n\tmeshphysical_vert: meshphysical_vert,\n\tnormal_frag: normal_frag,\n\tnormal_vert: normal_vert,\n\tpoints_frag: points_frag,\n\tpoints_vert: points_vert,\n\tshadow_frag: shadow_frag,\n\tshadow_vert: shadow_vert,\n\tsprite_frag: sprite_frag,\n\tsprite_vert: sprite_vert\n};\n\n/**\n * Uniforms library for shared webgl shaders\n */\n\nconst UniformsLib = {\n\n\tcommon: {\n\n\t\tdiffuse: { value: new Color( 0xeeeeee ) },\n\t\topacity: { value: 1.0 },\n\n\t\tmap: { value: null },\n\t\tuvTransform: { value: new Matrix3() },\n\t\tuv2Transform: { value: new Matrix3() },\n\n\t\talphaMap: { value: null },\n\n\t},\n\n\tspecularmap: {\n\n\t\tspecularMap: { value: null },\n\n\t},\n\n\tenvmap: {\n\n\t\tenvMap: { value: null },\n\t\tflipEnvMap: { value: - 1 },\n\t\treflectivity: { value: 1.0 },\n\t\trefractionRatio: { value: 0.98 },\n\t\tmaxMipLevel: { value: 0 }\n\n\t},\n\n\taomap: {\n\n\t\taoMap: { value: null },\n\t\taoMapIntensity: { value: 1 }\n\n\t},\n\n\tlightmap: {\n\n\t\tlightMap: { value: null },\n\t\tlightMapIntensity: { value: 1 }\n\n\t},\n\n\temissivemap: {\n\n\t\temissiveMap: { value: null }\n\n\t},\n\n\tbumpmap: {\n\n\t\tbumpMap: { value: null },\n\t\tbumpScale: { value: 1 }\n\n\t},\n\n\tnormalmap: {\n\n\t\tnormalMap: { value: null },\n\t\tnormalScale: { value: new Vector2( 1, 1 ) }\n\n\t},\n\n\tdisplacementmap: {\n\n\t\tdisplacementMap: { value: null },\n\t\tdisplacementScale: { value: 1 },\n\t\tdisplacementBias: { value: 0 }\n\n\t},\n\n\troughnessmap: {\n\n\t\troughnessMap: { value: null }\n\n\t},\n\n\tmetalnessmap: {\n\n\t\tmetalnessMap: { value: null }\n\n\t},\n\n\tgradientmap: {\n\n\t\tgradientMap: { value: null }\n\n\t},\n\n\tfog: {\n\n\t\tfogDensity: { value: 0.00025 },\n\t\tfogNear: { value: 1 },\n\t\tfogFar: { value: 2000 },\n\t\tfogColor: { value: new Color( 0xffffff ) }\n\n\t},\n\n\tlights: {\n\n\t\tambientLightColor: { value: [] },\n\n\t\tlightProbe: { value: [] },\n\n\t\tdirectionalLights: { value: [], properties: {\n\t\t\tdirection: {},\n\t\t\tcolor: {}\n\t\t} },\n\n\t\tdirectionalLightShadows: { value: [], properties: {\n\t\t\tshadowBias: {},\n\t\t\tshadowNormalBias: {},\n\t\t\tshadowRadius: {},\n\t\t\tshadowMapSize: {}\n\t\t} },\n\n\t\tdirectionalShadowMap: { value: [] },\n\t\tdirectionalShadowMatrix: { value: [] },\n\n\t\tspotLights: { value: [], properties: {\n\t\t\tcolor: {},\n\t\t\tposition: {},\n\t\t\tdirection: {},\n\t\t\tdistance: {},\n\t\t\tconeCos: {},\n\t\t\tpenumbraCos: {},\n\t\t\tdecay: {}\n\t\t} },\n\n\t\tspotLightShadows: { value: [], properties: {\n\t\t\tshadowBias: {},\n\t\t\tshadowNormalBias: {},\n\t\t\tshadowRadius: {},\n\t\t\tshadowMapSize: {}\n\t\t} },\n\n\t\tspotShadowMap: { value: [] },\n\t\tspotShadowMatrix: { value: [] },\n\n\t\tpointLights: { value: [], properties: {\n\t\t\tcolor: {},\n\t\t\tposition: {},\n\t\t\tdecay: {},\n\t\t\tdistance: {}\n\t\t} },\n\n\t\tpointLightShadows: { value: [], properties: {\n\t\t\tshadowBias: {},\n\t\t\tshadowNormalBias: {},\n\t\t\tshadowRadius: {},\n\t\t\tshadowMapSize: {},\n\t\t\tshadowCameraNear: {},\n\t\t\tshadowCameraFar: {}\n\t\t} },\n\n\t\tpointShadowMap: { value: [] },\n\t\tpointShadowMatrix: { value: [] },\n\n\t\themisphereLights: { value: [], properties: {\n\t\t\tdirection: {},\n\t\t\tskyColor: {},\n\t\t\tgroundColor: {}\n\t\t} },\n\n\t\t// TODO (abelnation): RectAreaLight BRDF data needs to be moved from example to main src\n\t\trectAreaLights: { value: [], properties: {\n\t\t\tcolor: {},\n\t\t\tposition: {},\n\t\t\twidth: {},\n\t\t\theight: {}\n\t\t} },\n\n\t\tltc_1: { value: null },\n\t\tltc_2: { value: null }\n\n\t},\n\n\tpoints: {\n\n\t\tdiffuse: { value: new Color( 0xeeeeee ) },\n\t\topacity: { value: 1.0 },\n\t\tsize: { value: 1.0 },\n\t\tscale: { value: 1.0 },\n\t\tmap: { value: null },\n\t\talphaMap: { value: null },\n\t\tuvTransform: { value: new Matrix3() }\n\n\t},\n\n\tsprite: {\n\n\t\tdiffuse: { value: new Color( 0xeeeeee ) },\n\t\topacity: { value: 1.0 },\n\t\tcenter: { value: new Vector2( 0.5, 0.5 ) },\n\t\trotation: { value: 0.0 },\n\t\tmap: { value: null },\n\t\talphaMap: { value: null },\n\t\tuvTransform: { value: new Matrix3() }\n\n\t}\n\n};\n\nconst ShaderLib = {\n\n\tbasic: {\n\n\t\tuniforms: mergeUniforms( [\n\t\t\tUniformsLib.common,\n\t\t\tUniformsLib.specularmap,\n\t\t\tUniformsLib.envmap,\n\t\t\tUniformsLib.aomap,\n\t\t\tUniformsLib.lightmap,\n\t\t\tUniformsLib.fog\n\t\t] ),\n\n\t\tvertexShader: ShaderChunk.meshbasic_vert,\n\t\tfragmentShader: ShaderChunk.meshbasic_frag\n\n\t},\n\n\tlambert: {\n\n\t\tuniforms: mergeUniforms( [\n\t\t\tUniformsLib.common,\n\t\t\tUniformsLib.specularmap,\n\t\t\tUniformsLib.envmap,\n\t\t\tUniformsLib.aomap,\n\t\t\tUniformsLib.lightmap,\n\t\t\tUniformsLib.emissivemap,\n\t\t\tUniformsLib.fog,\n\t\t\tUniformsLib.lights,\n\t\t\t{\n\t\t\t\temissive: { value: new Color( 0x000000 ) }\n\t\t\t}\n\t\t] ),\n\n\t\tvertexShader: ShaderChunk.meshlambert_vert,\n\t\tfragmentShader: ShaderChunk.meshlambert_frag\n\n\t},\n\n\tphong: {\n\n\t\tuniforms: mergeUniforms( [\n\t\t\tUniformsLib.common,\n\t\t\tUniformsLib.specularmap,\n\t\t\tUniformsLib.envmap,\n\t\t\tUniformsLib.aomap,\n\t\t\tUniformsLib.lightmap,\n\t\t\tUniformsLib.emissivemap,\n\t\t\tUniformsLib.bumpmap,\n\t\t\tUniformsLib.normalmap,\n\t\t\tUniformsLib.displacementmap,\n\t\t\tUniformsLib.fog,\n\t\t\tUniformsLib.lights,\n\t\t\t{\n\t\t\t\temissive: { value: new Color( 0x000000 ) },\n\t\t\t\tspecular: { value: new Color( 0x111111 ) },\n\t\t\t\tshininess: { value: 30 }\n\t\t\t}\n\t\t] ),\n\n\t\tvertexShader: ShaderChunk.meshphong_vert,\n\t\tfragmentShader: ShaderChunk.meshphong_frag\n\n\t},\n\n\tstandard: {\n\n\t\tuniforms: mergeUniforms( [\n\t\t\tUniformsLib.common,\n\t\t\tUniformsLib.envmap,\n\t\t\tUniformsLib.aomap,\n\t\t\tUniformsLib.lightmap,\n\t\t\tUniformsLib.emissivemap,\n\t\t\tUniformsLib.bumpmap,\n\t\t\tUniformsLib.normalmap,\n\t\t\tUniformsLib.displacementmap,\n\t\t\tUniformsLib.roughnessmap,\n\t\t\tUniformsLib.metalnessmap,\n\t\t\tUniformsLib.fog,\n\t\t\tUniformsLib.lights,\n\t\t\t{\n\t\t\t\temissive: { value: new Color( 0x000000 ) },\n\t\t\t\troughness: { value: 1.0 },\n\t\t\t\tmetalness: { value: 0.0 },\n\t\t\t\tenvMapIntensity: { value: 1 } // temporary\n\t\t\t}\n\t\t] ),\n\n\t\tvertexShader: ShaderChunk.meshphysical_vert,\n\t\tfragmentShader: ShaderChunk.meshphysical_frag\n\n\t},\n\n\ttoon: {\n\n\t\tuniforms: mergeUniforms( [\n\t\t\tUniformsLib.common,\n\t\t\tUniformsLib.aomap,\n\t\t\tUniformsLib.lightmap,\n\t\t\tUniformsLib.emissivemap,\n\t\t\tUniformsLib.bumpmap,\n\t\t\tUniformsLib.normalmap,\n\t\t\tUniformsLib.displacementmap,\n\t\t\tUniformsLib.gradientmap,\n\t\t\tUniformsLib.fog,\n\t\t\tUniformsLib.lights,\n\t\t\t{\n\t\t\t\temissive: { value: new Color( 0x000000 ) }\n\t\t\t}\n\t\t] ),\n\n\t\tvertexShader: ShaderChunk.meshtoon_vert,\n\t\tfragmentShader: ShaderChunk.meshtoon_frag\n\n\t},\n\n\tmatcap: {\n\n\t\tuniforms: mergeUniforms( [\n\t\t\tUniformsLib.common,\n\t\t\tUniformsLib.bumpmap,\n\t\t\tUniformsLib.normalmap,\n\t\t\tUniformsLib.displacementmap,\n\t\t\tUniformsLib.fog,\n\t\t\t{\n\t\t\t\tmatcap: { value: null }\n\t\t\t}\n\t\t] ),\n\n\t\tvertexShader: ShaderChunk.meshmatcap_vert,\n\t\tfragmentShader: ShaderChunk.meshmatcap_frag\n\n\t},\n\n\tpoints: {\n\n\t\tuniforms: mergeUniforms( [\n\t\t\tUniformsLib.points,\n\t\t\tUniformsLib.fog\n\t\t] ),\n\n\t\tvertexShader: ShaderChunk.points_vert,\n\t\tfragmentShader: ShaderChunk.points_frag\n\n\t},\n\n\tdashed: {\n\n\t\tuniforms: mergeUniforms( [\n\t\t\tUniformsLib.common,\n\t\t\tUniformsLib.fog,\n\t\t\t{\n\t\t\t\tscale: { value: 1 },\n\t\t\t\tdashSize: { value: 1 },\n\t\t\t\ttotalSize: { value: 2 }\n\t\t\t}\n\t\t] ),\n\n\t\tvertexShader: ShaderChunk.linedashed_vert,\n\t\tfragmentShader: ShaderChunk.linedashed_frag\n\n\t},\n\n\tdepth: {\n\n\t\tuniforms: mergeUniforms( [\n\t\t\tUniformsLib.common,\n\t\t\tUniformsLib.displacementmap\n\t\t] ),\n\n\t\tvertexShader: ShaderChunk.depth_vert,\n\t\tfragmentShader: ShaderChunk.depth_frag\n\n\t},\n\n\tnormal: {\n\n\t\tuniforms: mergeUniforms( [\n\t\t\tUniformsLib.common,\n\t\t\tUniformsLib.bumpmap,\n\t\t\tUniformsLib.normalmap,\n\t\t\tUniformsLib.displacementmap,\n\t\t\t{\n\t\t\t\topacity: { value: 1.0 }\n\t\t\t}\n\t\t] ),\n\n\t\tvertexShader: ShaderChunk.normal_vert,\n\t\tfragmentShader: ShaderChunk.normal_frag\n\n\t},\n\n\tsprite: {\n\n\t\tuniforms: mergeUniforms( [\n\t\t\tUniformsLib.sprite,\n\t\t\tUniformsLib.fog\n\t\t] ),\n\n\t\tvertexShader: ShaderChunk.sprite_vert,\n\t\tfragmentShader: ShaderChunk.sprite_frag\n\n\t},\n\n\tbackground: {\n\n\t\tuniforms: {\n\t\t\tuvTransform: { value: new Matrix3() },\n\t\t\tt2D: { value: null },\n\t\t},\n\n\t\tvertexShader: ShaderChunk.background_vert,\n\t\tfragmentShader: ShaderChunk.background_frag\n\n\t},\n\t/* -------------------------------------------------------------------------\n\t//\tCube map shader\n\t ------------------------------------------------------------------------- */\n\n\tcube: {\n\n\t\tuniforms: mergeUniforms( [\n\t\t\tUniformsLib.envmap,\n\t\t\t{\n\t\t\t\topacity: { value: 1.0 }\n\t\t\t}\n\t\t] ),\n\n\t\tvertexShader: ShaderChunk.cube_vert,\n\t\tfragmentShader: ShaderChunk.cube_frag\n\n\t},\n\n\tequirect: {\n\n\t\tuniforms: {\n\t\t\ttEquirect: { value: null },\n\t\t},\n\n\t\tvertexShader: ShaderChunk.equirect_vert,\n\t\tfragmentShader: ShaderChunk.equirect_frag\n\n\t},\n\n\tdistanceRGBA: {\n\n\t\tuniforms: mergeUniforms( [\n\t\t\tUniformsLib.common,\n\t\t\tUniformsLib.displacementmap,\n\t\t\t{\n\t\t\t\treferencePosition: { value: new Vector3() },\n\t\t\t\tnearDistance: { value: 1 },\n\t\t\t\tfarDistance: { value: 1000 }\n\t\t\t}\n\t\t] ),\n\n\t\tvertexShader: ShaderChunk.distanceRGBA_vert,\n\t\tfragmentShader: ShaderChunk.distanceRGBA_frag\n\n\t},\n\n\tshadow: {\n\n\t\tuniforms: mergeUniforms( [\n\t\t\tUniformsLib.lights,\n\t\t\tUniformsLib.fog,\n\t\t\t{\n\t\t\t\tcolor: { value: new Color( 0x00000 ) },\n\t\t\t\topacity: { value: 1.0 }\n\t\t\t},\n\t\t] ),\n\n\t\tvertexShader: ShaderChunk.shadow_vert,\n\t\tfragmentShader: ShaderChunk.shadow_frag\n\n\t}\n\n};\n\nShaderLib.physical = {\n\n\tuniforms: mergeUniforms( [\n\t\tShaderLib.standard.uniforms,\n\t\t{\n\t\t\tclearcoat: { value: 0 },\n\t\t\tclearcoatMap: { value: null },\n\t\t\tclearcoatRoughness: { value: 0 },\n\t\t\tclearcoatRoughnessMap: { value: null },\n\t\t\tclearcoatNormalScale: { value: new Vector2( 1, 1 ) },\n\t\t\tclearcoatNormalMap: { value: null },\n\t\t\tsheen: { value: new Color( 0x000000 ) },\n\t\t\ttransmission: { value: 0 },\n\t\t\ttransmissionMap: { value: null },\n\t\t}\n\t] ),\n\n\tvertexShader: ShaderChunk.meshphysical_vert,\n\tfragmentShader: ShaderChunk.meshphysical_frag\n\n};\n\nfunction WebGLBackground( renderer, cubemaps, state, objects, premultipliedAlpha ) {\n\n\tconst clearColor = new Color( 0x000000 );\n\tlet clearAlpha = 0;\n\n\tlet planeMesh;\n\tlet boxMesh;\n\n\tlet currentBackground = null;\n\tlet currentBackgroundVersion = 0;\n\tlet currentTonemapping = null;\n\n\tfunction render( renderList, scene, camera, forceClear ) {\n\n\t\tlet background = scene.isScene === true ? scene.background : null;\n\n\t\tif ( background && background.isTexture ) {\n\n\t\t\tbackground = cubemaps.get( background );\n\n\t\t}\n\n\t\t// Ignore background in AR\n\t\t// TODO: Reconsider this.\n\n\t\tconst xr = renderer.xr;\n\t\tconst session = xr.getSession && xr.getSession();\n\n\t\tif ( session && session.environmentBlendMode === 'additive' ) {\n\n\t\t\tbackground = null;\n\n\t\t}\n\n\t\tif ( background === null ) {\n\n\t\t\tsetClear( clearColor, clearAlpha );\n\n\t\t} else if ( background && background.isColor ) {\n\n\t\t\tsetClear( background, 1 );\n\t\t\tforceClear = true;\n\n\t\t}\n\n\t\tif ( renderer.autoClear || forceClear ) {\n\n\t\t\trenderer.clear( renderer.autoClearColor, renderer.autoClearDepth, renderer.autoClearStencil );\n\n\t\t}\n\n\t\tif ( background && ( background.isCubeTexture || background.isWebGLCubeRenderTarget || background.mapping === CubeUVReflectionMapping ) ) {\n\n\t\t\tif ( boxMesh === undefined ) {\n\n\t\t\t\tboxMesh = new Mesh(\n\t\t\t\t\tnew BoxGeometry( 1, 1, 1 ),\n\t\t\t\t\tnew ShaderMaterial( {\n\t\t\t\t\t\tname: 'BackgroundCubeMaterial',\n\t\t\t\t\t\tuniforms: cloneUniforms( ShaderLib.cube.uniforms ),\n\t\t\t\t\t\tvertexShader: ShaderLib.cube.vertexShader,\n\t\t\t\t\t\tfragmentShader: ShaderLib.cube.fragmentShader,\n\t\t\t\t\t\tside: BackSide,\n\t\t\t\t\t\tdepthTest: false,\n\t\t\t\t\t\tdepthWrite: false,\n\t\t\t\t\t\tfog: false\n\t\t\t\t\t} )\n\t\t\t\t);\n\n\t\t\t\tboxMesh.geometry.deleteAttribute( 'normal' );\n\t\t\t\tboxMesh.geometry.deleteAttribute( 'uv' );\n\n\t\t\t\tboxMesh.onBeforeRender = function ( renderer, scene, camera ) {\n\n\t\t\t\t\tthis.matrixWorld.copyPosition( camera.matrixWorld );\n\n\t\t\t\t};\n\n\t\t\t\t// enable code injection for non-built-in material\n\t\t\t\tObject.defineProperty( boxMesh.material, 'envMap', {\n\n\t\t\t\t\tget: function () {\n\n\t\t\t\t\t\treturn this.uniforms.envMap.value;\n\n\t\t\t\t\t}\n\n\t\t\t\t} );\n\n\t\t\t\tobjects.update( boxMesh );\n\n\t\t\t}\n\n\t\t\tif ( background.isWebGLCubeRenderTarget ) {\n\n\t\t\t\t// TODO Deprecate\n\n\t\t\t\tbackground = background.texture;\n\n\t\t\t}\n\n\t\t\tboxMesh.material.uniforms.envMap.value = background;\n\t\t\tboxMesh.material.uniforms.flipEnvMap.value = ( background.isCubeTexture && background._needsFlipEnvMap ) ? - 1 : 1;\n\n\t\t\tif ( currentBackground !== background ||\n\t\t\t\tcurrentBackgroundVersion !== background.version ||\n\t\t\t\tcurrentTonemapping !== renderer.toneMapping ) {\n\n\t\t\t\tboxMesh.material.needsUpdate = true;\n\n\t\t\t\tcurrentBackground = background;\n\t\t\t\tcurrentBackgroundVersion = background.version;\n\t\t\t\tcurrentTonemapping = renderer.toneMapping;\n\n\t\t\t}\n\n\t\t\t// push to the pre-sorted opaque render list\n\t\t\trenderList.unshift( boxMesh, boxMesh.geometry, boxMesh.material, 0, 0, null );\n\n\t\t} else if ( background && background.isTexture ) {\n\n\t\t\tif ( planeMesh === undefined ) {\n\n\t\t\t\tplaneMesh = new Mesh(\n\t\t\t\t\tnew PlaneGeometry( 2, 2 ),\n\t\t\t\t\tnew ShaderMaterial( {\n\t\t\t\t\t\tname: 'BackgroundMaterial',\n\t\t\t\t\t\tuniforms: cloneUniforms( ShaderLib.background.uniforms ),\n\t\t\t\t\t\tvertexShader: ShaderLib.background.vertexShader,\n\t\t\t\t\t\tfragmentShader: ShaderLib.background.fragmentShader,\n\t\t\t\t\t\tside: FrontSide,\n\t\t\t\t\t\tdepthTest: false,\n\t\t\t\t\t\tdepthWrite: false,\n\t\t\t\t\t\tfog: false\n\t\t\t\t\t} )\n\t\t\t\t);\n\n\t\t\t\tplaneMesh.geometry.deleteAttribute( 'normal' );\n\n\t\t\t\t// enable code injection for non-built-in material\n\t\t\t\tObject.defineProperty( planeMesh.material, 'map', {\n\n\t\t\t\t\tget: function () {\n\n\t\t\t\t\t\treturn this.uniforms.t2D.value;\n\n\t\t\t\t\t}\n\n\t\t\t\t} );\n\n\t\t\t\tobjects.update( planeMesh );\n\n\t\t\t}\n\n\t\t\tplaneMesh.material.uniforms.t2D.value = background;\n\n\t\t\tif ( background.matrixAutoUpdate === true ) {\n\n\t\t\t\tbackground.updateMatrix();\n\n\t\t\t}\n\n\t\t\tplaneMesh.material.uniforms.uvTransform.value.copy( background.matrix );\n\n\t\t\tif ( currentBackground !== background ||\n\t\t\t\tcurrentBackgroundVersion !== background.version ||\n\t\t\t\tcurrentTonemapping !== renderer.toneMapping ) {\n\n\t\t\t\tplaneMesh.material.needsUpdate = true;\n\n\t\t\t\tcurrentBackground = background;\n\t\t\t\tcurrentBackgroundVersion = background.version;\n\t\t\t\tcurrentTonemapping = renderer.toneMapping;\n\n\t\t\t}\n\n\n\t\t\t// push to the pre-sorted opaque render list\n\t\t\trenderList.unshift( planeMesh, planeMesh.geometry, planeMesh.material, 0, 0, null );\n\n\t\t}\n\n\t}\n\n\tfunction setClear( color, alpha ) {\n\n\t\tstate.buffers.color.setClear( color.r, color.g, color.b, alpha, premultipliedAlpha );\n\n\t}\n\n\treturn {\n\n\t\tgetClearColor: function () {\n\n\t\t\treturn clearColor;\n\n\t\t},\n\t\tsetClearColor: function ( color, alpha = 1 ) {\n\n\t\t\tclearColor.set( color );\n\t\t\tclearAlpha = alpha;\n\t\t\tsetClear( clearColor, clearAlpha );\n\n\t\t},\n\t\tgetClearAlpha: function () {\n\n\t\t\treturn clearAlpha;\n\n\t\t},\n\t\tsetClearAlpha: function ( alpha ) {\n\n\t\t\tclearAlpha = alpha;\n\t\t\tsetClear( clearColor, clearAlpha );\n\n\t\t},\n\t\trender: render\n\n\t};\n\n}\n\nfunction WebGLBindingStates( gl, extensions, attributes, capabilities ) {\n\n\tconst maxVertexAttributes = gl.getParameter( 34921 );\n\n\tconst extension = capabilities.isWebGL2 ? null : extensions.get( 'OES_vertex_array_object' );\n\tconst vaoAvailable = capabilities.isWebGL2 || extension !== null;\n\n\tconst bindingStates = {};\n\n\tconst defaultState = createBindingState( null );\n\tlet currentState = defaultState;\n\n\tfunction setup( object, material, program, geometry, index ) {\n\n\t\tlet updateBuffers = false;\n\n\t\tif ( vaoAvailable ) {\n\n\t\t\tconst state = getBindingState( geometry, program, material );\n\n\t\t\tif ( currentState !== state ) {\n\n\t\t\t\tcurrentState = state;\n\t\t\t\tbindVertexArrayObject( currentState.object );\n\n\t\t\t}\n\n\t\t\tupdateBuffers = needsUpdate( geometry, index );\n\n\t\t\tif ( updateBuffers ) saveCache( geometry, index );\n\n\t\t} else {\n\n\t\t\tconst wireframe = ( material.wireframe === true );\n\n\t\t\tif ( currentState.geometry !== geometry.id ||\n\t\t\t\tcurrentState.program !== program.id ||\n\t\t\t\tcurrentState.wireframe !== wireframe ) {\n\n\t\t\t\tcurrentState.geometry = geometry.id;\n\t\t\t\tcurrentState.program = program.id;\n\t\t\t\tcurrentState.wireframe = wireframe;\n\n\t\t\t\tupdateBuffers = true;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( object.isInstancedMesh === true ) {\n\n\t\t\tupdateBuffers = true;\n\n\t\t}\n\n\t\tif ( index !== null ) {\n\n\t\t\tattributes.update( index, 34963 );\n\n\t\t}\n\n\t\tif ( updateBuffers ) {\n\n\t\t\tsetupVertexAttributes( object, material, program, geometry );\n\n\t\t\tif ( index !== null ) {\n\n\t\t\t\tgl.bindBuffer( 34963, attributes.get( index ).buffer );\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\tfunction createVertexArrayObject() {\n\n\t\tif ( capabilities.isWebGL2 ) return gl.createVertexArray();\n\n\t\treturn extension.createVertexArrayOES();\n\n\t}\n\n\tfunction bindVertexArrayObject( vao ) {\n\n\t\tif ( capabilities.isWebGL2 ) return gl.bindVertexArray( vao );\n\n\t\treturn extension.bindVertexArrayOES( vao );\n\n\t}\n\n\tfunction deleteVertexArrayObject( vao ) {\n\n\t\tif ( capabilities.isWebGL2 ) return gl.deleteVertexArray( vao );\n\n\t\treturn extension.deleteVertexArrayOES( vao );\n\n\t}\n\n\tfunction getBindingState( geometry, program, material ) {\n\n\t\tconst wireframe = ( material.wireframe === true );\n\n\t\tlet programMap = bindingStates[ geometry.id ];\n\n\t\tif ( programMap === undefined ) {\n\n\t\t\tprogramMap = {};\n\t\t\tbindingStates[ geometry.id ] = programMap;\n\n\t\t}\n\n\t\tlet stateMap = programMap[ program.id ];\n\n\t\tif ( stateMap === undefined ) {\n\n\t\t\tstateMap = {};\n\t\t\tprogramMap[ program.id ] = stateMap;\n\n\t\t}\n\n\t\tlet state = stateMap[ wireframe ];\n\n\t\tif ( state === undefined ) {\n\n\t\t\tstate = createBindingState( createVertexArrayObject() );\n\t\t\tstateMap[ wireframe ] = state;\n\n\t\t}\n\n\t\treturn state;\n\n\t}\n\n\tfunction createBindingState( vao ) {\n\n\t\tconst newAttributes = [];\n\t\tconst enabledAttributes = [];\n\t\tconst attributeDivisors = [];\n\n\t\tfor ( let i = 0; i < maxVertexAttributes; i ++ ) {\n\n\t\t\tnewAttributes[ i ] = 0;\n\t\t\tenabledAttributes[ i ] = 0;\n\t\t\tattributeDivisors[ i ] = 0;\n\n\t\t}\n\n\t\treturn {\n\n\t\t\t// for backward compatibility on non-VAO support browser\n\t\t\tgeometry: null,\n\t\t\tprogram: null,\n\t\t\twireframe: false,\n\n\t\t\tnewAttributes: newAttributes,\n\t\t\tenabledAttributes: enabledAttributes,\n\t\t\tattributeDivisors: attributeDivisors,\n\t\t\tobject: vao,\n\t\t\tattributes: {},\n\t\t\tindex: null\n\n\t\t};\n\n\t}\n\n\tfunction needsUpdate( geometry, index ) {\n\n\t\tconst cachedAttributes = currentState.attributes;\n\t\tconst geometryAttributes = geometry.attributes;\n\n\t\tlet attributesNum = 0;\n\n\t\tfor ( const key in geometryAttributes ) {\n\n\t\t\tconst cachedAttribute = cachedAttributes[ key ];\n\t\t\tconst geometryAttribute = geometryAttributes[ key ];\n\n\t\t\tif ( cachedAttribute === undefined ) return true;\n\n\t\t\tif ( cachedAttribute.attribute !== geometryAttribute ) return true;\n\n\t\t\tif ( cachedAttribute.data !== geometryAttribute.data ) return true;\n\n\t\t\tattributesNum ++;\n\n\t\t}\n\n\t\tif ( currentState.attributesNum !== attributesNum ) return true;\n\n\t\tif ( currentState.index !== index ) return true;\n\n\t\treturn false;\n\n\t}\n\n\tfunction saveCache( geometry, index ) {\n\n\t\tconst cache = {};\n\t\tconst attributes = geometry.attributes;\n\t\tlet attributesNum = 0;\n\n\t\tfor ( const key in attributes ) {\n\n\t\t\tconst attribute = attributes[ key ];\n\n\t\t\tconst data = {};\n\t\t\tdata.attribute = attribute;\n\n\t\t\tif ( attribute.data ) {\n\n\t\t\t\tdata.data = attribute.data;\n\n\t\t\t}\n\n\t\t\tcache[ key ] = data;\n\n\t\t\tattributesNum ++;\n\n\t\t}\n\n\t\tcurrentState.attributes = cache;\n\t\tcurrentState.attributesNum = attributesNum;\n\n\t\tcurrentState.index = index;\n\n\t}\n\n\tfunction initAttributes() {\n\n\t\tconst newAttributes = currentState.newAttributes;\n\n\t\tfor ( let i = 0, il = newAttributes.length; i < il; i ++ ) {\n\n\t\t\tnewAttributes[ i ] = 0;\n\n\t\t}\n\n\t}\n\n\tfunction enableAttribute( attribute ) {\n\n\t\tenableAttributeAndDivisor( attribute, 0 );\n\n\t}\n\n\tfunction enableAttributeAndDivisor( attribute, meshPerAttribute ) {\n\n\t\tconst newAttributes = currentState.newAttributes;\n\t\tconst enabledAttributes = currentState.enabledAttributes;\n\t\tconst attributeDivisors = currentState.attributeDivisors;\n\n\t\tnewAttributes[ attribute ] = 1;\n\n\t\tif ( enabledAttributes[ attribute ] === 0 ) {\n\n\t\t\tgl.enableVertexAttribArray( attribute );\n\t\t\tenabledAttributes[ attribute ] = 1;\n\n\t\t}\n\n\t\tif ( attributeDivisors[ attribute ] !== meshPerAttribute ) {\n\n\t\t\tconst extension = capabilities.isWebGL2 ? gl : extensions.get( 'ANGLE_instanced_arrays' );\n\n\t\t\textension[ capabilities.isWebGL2 ? 'vertexAttribDivisor' : 'vertexAttribDivisorANGLE' ]( attribute, meshPerAttribute );\n\t\t\tattributeDivisors[ attribute ] = meshPerAttribute;\n\n\t\t}\n\n\t}\n\n\tfunction disableUnusedAttributes() {\n\n\t\tconst newAttributes = currentState.newAttributes;\n\t\tconst enabledAttributes = currentState.enabledAttributes;\n\n\t\tfor ( let i = 0, il = enabledAttributes.length; i < il; i ++ ) {\n\n\t\t\tif ( enabledAttributes[ i ] !== newAttributes[ i ] ) {\n\n\t\t\t\tgl.disableVertexAttribArray( i );\n\t\t\t\tenabledAttributes[ i ] = 0;\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\tfunction vertexAttribPointer( index, size, type, normalized, stride, offset ) {\n\n\t\tif ( capabilities.isWebGL2 === true && ( type === 5124 || type === 5125 ) ) {\n\n\t\t\tgl.vertexAttribIPointer( index, size, type, stride, offset );\n\n\t\t} else {\n\n\t\t\tgl.vertexAttribPointer( index, size, type, normalized, stride, offset );\n\n\t\t}\n\n\t}\n\n\tfunction setupVertexAttributes( object, material, program, geometry ) {\n\n\t\tif ( capabilities.isWebGL2 === false && ( object.isInstancedMesh || geometry.isInstancedBufferGeometry ) ) {\n\n\t\t\tif ( extensions.get( 'ANGLE_instanced_arrays' ) === null ) return;\n\n\t\t}\n\n\t\tinitAttributes();\n\n\t\tconst geometryAttributes = geometry.attributes;\n\n\t\tconst programAttributes = program.getAttributes();\n\n\t\tconst materialDefaultAttributeValues = material.defaultAttributeValues;\n\n\t\tfor ( const name in programAttributes ) {\n\n\t\t\tconst programAttribute = programAttributes[ name ];\n\n\t\t\tif ( programAttribute >= 0 ) {\n\n\t\t\t\tconst geometryAttribute = geometryAttributes[ name ];\n\n\t\t\t\tif ( geometryAttribute !== undefined ) {\n\n\t\t\t\t\tconst normalized = geometryAttribute.normalized;\n\t\t\t\t\tconst size = geometryAttribute.itemSize;\n\n\t\t\t\t\tconst attribute = attributes.get( geometryAttribute );\n\n\t\t\t\t\t// TODO Attribute may not be available on context restore\n\n\t\t\t\t\tif ( attribute === undefined ) continue;\n\n\t\t\t\t\tconst buffer = attribute.buffer;\n\t\t\t\t\tconst type = attribute.type;\n\t\t\t\t\tconst bytesPerElement = attribute.bytesPerElement;\n\n\t\t\t\t\tif ( geometryAttribute.isInterleavedBufferAttribute ) {\n\n\t\t\t\t\t\tconst data = geometryAttribute.data;\n\t\t\t\t\t\tconst stride = data.stride;\n\t\t\t\t\t\tconst offset = geometryAttribute.offset;\n\n\t\t\t\t\t\tif ( data && data.isInstancedInterleavedBuffer ) {\n\n\t\t\t\t\t\t\tenableAttributeAndDivisor( programAttribute, data.meshPerAttribute );\n\n\t\t\t\t\t\t\tif ( geometry._maxInstanceCount === undefined ) {\n\n\t\t\t\t\t\t\t\tgeometry._maxInstanceCount = data.meshPerAttribute * data.count;\n\n\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t} else {\n\n\t\t\t\t\t\t\tenableAttribute( programAttribute );\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tgl.bindBuffer( 34962, buffer );\n\t\t\t\t\t\tvertexAttribPointer( programAttribute, size, type, normalized, stride * bytesPerElement, offset * bytesPerElement );\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\tif ( geometryAttribute.isInstancedBufferAttribute ) {\n\n\t\t\t\t\t\t\tenableAttributeAndDivisor( programAttribute, geometryAttribute.meshPerAttribute );\n\n\t\t\t\t\t\t\tif ( geometry._maxInstanceCount === undefined ) {\n\n\t\t\t\t\t\t\t\tgeometry._maxInstanceCount = geometryAttribute.meshPerAttribute * geometryAttribute.count;\n\n\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t} else {\n\n\t\t\t\t\t\t\tenableAttribute( programAttribute );\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tgl.bindBuffer( 34962, buffer );\n\t\t\t\t\t\tvertexAttribPointer( programAttribute, size, type, normalized, 0, 0 );\n\n\t\t\t\t\t}\n\n\t\t\t\t} else if ( name === 'instanceMatrix' ) {\n\n\t\t\t\t\tconst attribute = attributes.get( object.instanceMatrix );\n\n\t\t\t\t\t// TODO Attribute may not be available on context restore\n\n\t\t\t\t\tif ( attribute === undefined ) continue;\n\n\t\t\t\t\tconst buffer = attribute.buffer;\n\t\t\t\t\tconst type = attribute.type;\n\n\t\t\t\t\tenableAttributeAndDivisor( programAttribute + 0, 1 );\n\t\t\t\t\tenableAttributeAndDivisor( programAttribute + 1, 1 );\n\t\t\t\t\tenableAttributeAndDivisor( programAttribute + 2, 1 );\n\t\t\t\t\tenableAttributeAndDivisor( programAttribute + 3, 1 );\n\n\t\t\t\t\tgl.bindBuffer( 34962, buffer );\n\n\t\t\t\t\tgl.vertexAttribPointer( programAttribute + 0, 4, type, false, 64, 0 );\n\t\t\t\t\tgl.vertexAttribPointer( programAttribute + 1, 4, type, false, 64, 16 );\n\t\t\t\t\tgl.vertexAttribPointer( programAttribute + 2, 4, type, false, 64, 32 );\n\t\t\t\t\tgl.vertexAttribPointer( programAttribute + 3, 4, type, false, 64, 48 );\n\n\t\t\t\t} else if ( name === 'instanceColor' ) {\n\n\t\t\t\t\tconst attribute = attributes.get( object.instanceColor );\n\n\t\t\t\t\t// TODO Attribute may not be available on context restore\n\n\t\t\t\t\tif ( attribute === undefined ) continue;\n\n\t\t\t\t\tconst buffer = attribute.buffer;\n\t\t\t\t\tconst type = attribute.type;\n\n\t\t\t\t\tenableAttributeAndDivisor( programAttribute, 1 );\n\n\t\t\t\t\tgl.bindBuffer( 34962, buffer );\n\n\t\t\t\t\tgl.vertexAttribPointer( programAttribute, 3, type, false, 12, 0 );\n\n\t\t\t\t} else if ( materialDefaultAttributeValues !== undefined ) {\n\n\t\t\t\t\tconst value = materialDefaultAttributeValues[ name ];\n\n\t\t\t\t\tif ( value !== undefined ) {\n\n\t\t\t\t\t\tswitch ( value.length ) {\n\n\t\t\t\t\t\t\tcase 2:\n\t\t\t\t\t\t\t\tgl.vertexAttrib2fv( programAttribute, value );\n\t\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\t\tcase 3:\n\t\t\t\t\t\t\t\tgl.vertexAttrib3fv( programAttribute, value );\n\t\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\t\tcase 4:\n\t\t\t\t\t\t\t\tgl.vertexAttrib4fv( programAttribute, value );\n\t\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\t\tdefault:\n\t\t\t\t\t\t\t\tgl.vertexAttrib1fv( programAttribute, value );\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\tdisableUnusedAttributes();\n\n\t}\n\n\tfunction dispose() {\n\n\t\treset();\n\n\t\tfor ( const geometryId in bindingStates ) {\n\n\t\t\tconst programMap = bindingStates[ geometryId ];\n\n\t\t\tfor ( const programId in programMap ) {\n\n\t\t\t\tconst stateMap = programMap[ programId ];\n\n\t\t\t\tfor ( const wireframe in stateMap ) {\n\n\t\t\t\t\tdeleteVertexArrayObject( stateMap[ wireframe ].object );\n\n\t\t\t\t\tdelete stateMap[ wireframe ];\n\n\t\t\t\t}\n\n\t\t\t\tdelete programMap[ programId ];\n\n\t\t\t}\n\n\t\t\tdelete bindingStates[ geometryId ];\n\n\t\t}\n\n\t}\n\n\tfunction releaseStatesOfGeometry( geometry ) {\n\n\t\tif ( bindingStates[ geometry.id ] === undefined ) return;\n\n\t\tconst programMap = bindingStates[ geometry.id ];\n\n\t\tfor ( const programId in programMap ) {\n\n\t\t\tconst stateMap = programMap[ programId ];\n\n\t\t\tfor ( const wireframe in stateMap ) {\n\n\t\t\t\tdeleteVertexArrayObject( stateMap[ wireframe ].object );\n\n\t\t\t\tdelete stateMap[ wireframe ];\n\n\t\t\t}\n\n\t\t\tdelete programMap[ programId ];\n\n\t\t}\n\n\t\tdelete bindingStates[ geometry.id ];\n\n\t}\n\n\tfunction releaseStatesOfProgram( program ) {\n\n\t\tfor ( const geometryId in bindingStates ) {\n\n\t\t\tconst programMap = bindingStates[ geometryId ];\n\n\t\t\tif ( programMap[ program.id ] === undefined ) continue;\n\n\t\t\tconst stateMap = programMap[ program.id ];\n\n\t\t\tfor ( const wireframe in stateMap ) {\n\n\t\t\t\tdeleteVertexArrayObject( stateMap[ wireframe ].object );\n\n\t\t\t\tdelete stateMap[ wireframe ];\n\n\t\t\t}\n\n\t\t\tdelete programMap[ program.id ];\n\n\t\t}\n\n\t}\n\n\tfunction reset() {\n\n\t\tresetDefaultState();\n\n\t\tif ( currentState === defaultState ) return;\n\n\t\tcurrentState = defaultState;\n\t\tbindVertexArrayObject( currentState.object );\n\n\t}\n\n\t// for backward-compatilibity\n\n\tfunction resetDefaultState() {\n\n\t\tdefaultState.geometry = null;\n\t\tdefaultState.program = null;\n\t\tdefaultState.wireframe = false;\n\n\t}\n\n\treturn {\n\n\t\tsetup: setup,\n\t\treset: reset,\n\t\tresetDefaultState: resetDefaultState,\n\t\tdispose: dispose,\n\t\treleaseStatesOfGeometry: releaseStatesOfGeometry,\n\t\treleaseStatesOfProgram: releaseStatesOfProgram,\n\n\t\tinitAttributes: initAttributes,\n\t\tenableAttribute: enableAttribute,\n\t\tdisableUnusedAttributes: disableUnusedAttributes\n\n\t};\n\n}\n\nfunction WebGLBufferRenderer( gl, extensions, info, capabilities ) {\n\n\tconst isWebGL2 = capabilities.isWebGL2;\n\n\tlet mode;\n\n\tfunction setMode( value ) {\n\n\t\tmode = value;\n\n\t}\n\n\tfunction render( start, count ) {\n\n\t\tgl.drawArrays( mode, start, count );\n\n\t\tinfo.update( count, mode, 1 );\n\n\t}\n\n\tfunction renderInstances( start, count, primcount ) {\n\n\t\tif ( primcount === 0 ) return;\n\n\t\tlet extension, methodName;\n\n\t\tif ( isWebGL2 ) {\n\n\t\t\textension = gl;\n\t\t\tmethodName = 'drawArraysInstanced';\n\n\t\t} else {\n\n\t\t\textension = extensions.get( 'ANGLE_instanced_arrays' );\n\t\t\tmethodName = 'drawArraysInstancedANGLE';\n\n\t\t\tif ( extension === null ) {\n\n\t\t\t\tconsole.error( 'THREE.WebGLBufferRenderer: using THREE.InstancedBufferGeometry but hardware does not support extension ANGLE_instanced_arrays.' );\n\t\t\t\treturn;\n\n\t\t\t}\n\n\t\t}\n\n\t\textension[ methodName ]( mode, start, count, primcount );\n\n\t\tinfo.update( count, mode, primcount );\n\n\t}\n\n\t//\n\n\tthis.setMode = setMode;\n\tthis.render = render;\n\tthis.renderInstances = renderInstances;\n\n}\n\nfunction WebGLCapabilities( gl, extensions, parameters ) {\n\n\tlet maxAnisotropy;\n\n\tfunction getMaxAnisotropy() {\n\n\t\tif ( maxAnisotropy !== undefined ) return maxAnisotropy;\n\n\t\tconst extension = extensions.get( 'EXT_texture_filter_anisotropic' );\n\n\t\tif ( extension !== null ) {\n\n\t\t\tmaxAnisotropy = gl.getParameter( extension.MAX_TEXTURE_MAX_ANISOTROPY_EXT );\n\n\t\t} else {\n\n\t\t\tmaxAnisotropy = 0;\n\n\t\t}\n\n\t\treturn maxAnisotropy;\n\n\t}\n\n\tfunction getMaxPrecision( precision ) {\n\n\t\tif ( precision === 'highp' ) {\n\n\t\t\tif ( gl.getShaderPrecisionFormat( 35633, 36338 ).precision > 0 &&\n\t\t\t\tgl.getShaderPrecisionFormat( 35632, 36338 ).precision > 0 ) {\n\n\t\t\t\treturn 'highp';\n\n\t\t\t}\n\n\t\t\tprecision = 'mediump';\n\n\t\t}\n\n\t\tif ( precision === 'mediump' ) {\n\n\t\t\tif ( gl.getShaderPrecisionFormat( 35633, 36337 ).precision > 0 &&\n\t\t\t\tgl.getShaderPrecisionFormat( 35632, 36337 ).precision > 0 ) {\n\n\t\t\t\treturn 'mediump';\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn 'lowp';\n\n\t}\n\n\t/* eslint-disable no-undef */\n\tconst isWebGL2 = ( typeof WebGL2RenderingContext !== 'undefined' && gl instanceof WebGL2RenderingContext ) ||\n\t\t( typeof WebGL2ComputeRenderingContext !== 'undefined' && gl instanceof WebGL2ComputeRenderingContext );\n\t/* eslint-enable no-undef */\n\n\tlet precision = parameters.precision !== undefined ? parameters.precision : 'highp';\n\tconst maxPrecision = getMaxPrecision( precision );\n\n\tif ( maxPrecision !== precision ) {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer:', precision, 'not supported, using', maxPrecision, 'instead.' );\n\t\tprecision = maxPrecision;\n\n\t}\n\n\tconst logarithmicDepthBuffer = parameters.logarithmicDepthBuffer === true;\n\n\tconst maxTextures = gl.getParameter( 34930 );\n\tconst maxVertexTextures = gl.getParameter( 35660 );\n\tconst maxTextureSize = gl.getParameter( 3379 );\n\tconst maxCubemapSize = gl.getParameter( 34076 );\n\n\tconst maxAttributes = gl.getParameter( 34921 );\n\tconst maxVertexUniforms = gl.getParameter( 36347 );\n\tconst maxVaryings = gl.getParameter( 36348 );\n\tconst maxFragmentUniforms = gl.getParameter( 36349 );\n\n\tconst vertexTextures = maxVertexTextures > 0;\n\tconst floatFragmentTextures = isWebGL2 || !! extensions.get( 'OES_texture_float' );\n\tconst floatVertexTextures = vertexTextures && floatFragmentTextures;\n\n\tconst maxSamples = isWebGL2 ? gl.getParameter( 36183 ) : 0;\n\n\treturn {\n\n\t\tisWebGL2: isWebGL2,\n\n\t\tgetMaxAnisotropy: getMaxAnisotropy,\n\t\tgetMaxPrecision: getMaxPrecision,\n\n\t\tprecision: precision,\n\t\tlogarithmicDepthBuffer: logarithmicDepthBuffer,\n\n\t\tmaxTextures: maxTextures,\n\t\tmaxVertexTextures: maxVertexTextures,\n\t\tmaxTextureSize: maxTextureSize,\n\t\tmaxCubemapSize: maxCubemapSize,\n\n\t\tmaxAttributes: maxAttributes,\n\t\tmaxVertexUniforms: maxVertexUniforms,\n\t\tmaxVaryings: maxVaryings,\n\t\tmaxFragmentUniforms: maxFragmentUniforms,\n\n\t\tvertexTextures: vertexTextures,\n\t\tfloatFragmentTextures: floatFragmentTextures,\n\t\tfloatVertexTextures: floatVertexTextures,\n\n\t\tmaxSamples: maxSamples\n\n\t};\n\n}\n\nfunction WebGLClipping( properties ) {\n\n\tconst scope = this;\n\n\tlet globalState = null,\n\t\tnumGlobalPlanes = 0,\n\t\tlocalClippingEnabled = false,\n\t\trenderingShadows = false;\n\n\tconst plane = new Plane(),\n\t\tviewNormalMatrix = new Matrix3(),\n\n\t\tuniform = { value: null, needsUpdate: false };\n\n\tthis.uniform = uniform;\n\tthis.numPlanes = 0;\n\tthis.numIntersection = 0;\n\n\tthis.init = function ( planes, enableLocalClipping, camera ) {\n\n\t\tconst enabled =\n\t\t\tplanes.length !== 0 ||\n\t\t\tenableLocalClipping ||\n\t\t\t// enable state of previous frame - the clipping code has to\n\t\t\t// run another frame in order to reset the state:\n\t\t\tnumGlobalPlanes !== 0 ||\n\t\t\tlocalClippingEnabled;\n\n\t\tlocalClippingEnabled = enableLocalClipping;\n\n\t\tglobalState = projectPlanes( planes, camera, 0 );\n\t\tnumGlobalPlanes = planes.length;\n\n\t\treturn enabled;\n\n\t};\n\n\tthis.beginShadows = function () {\n\n\t\trenderingShadows = true;\n\t\tprojectPlanes( null );\n\n\t};\n\n\tthis.endShadows = function () {\n\n\t\trenderingShadows = false;\n\t\tresetGlobalState();\n\n\t};\n\n\tthis.setState = function ( material, camera, useCache ) {\n\n\t\tconst planes = material.clippingPlanes,\n\t\t\tclipIntersection = material.clipIntersection,\n\t\t\tclipShadows = material.clipShadows;\n\n\t\tconst materialProperties = properties.get( material );\n\n\t\tif ( ! localClippingEnabled || planes === null || planes.length === 0 || renderingShadows && ! clipShadows ) {\n\n\t\t\t// there's no local clipping\n\n\t\t\tif ( renderingShadows ) {\n\n\t\t\t\t// there's no global clipping\n\n\t\t\t\tprojectPlanes( null );\n\n\t\t\t} else {\n\n\t\t\t\tresetGlobalState();\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\tconst nGlobal = renderingShadows ? 0 : numGlobalPlanes,\n\t\t\t\tlGlobal = nGlobal * 4;\n\n\t\t\tlet dstArray = materialProperties.clippingState || null;\n\n\t\t\tuniform.value = dstArray; // ensure unique state\n\n\t\t\tdstArray = projectPlanes( planes, camera, lGlobal, useCache );\n\n\t\t\tfor ( let i = 0; i !== lGlobal; ++ i ) {\n\n\t\t\t\tdstArray[ i ] = globalState[ i ];\n\n\t\t\t}\n\n\t\t\tmaterialProperties.clippingState = dstArray;\n\t\t\tthis.numIntersection = clipIntersection ? this.numPlanes : 0;\n\t\t\tthis.numPlanes += nGlobal;\n\n\t\t}\n\n\n\t};\n\n\tfunction resetGlobalState() {\n\n\t\tif ( uniform.value !== globalState ) {\n\n\t\t\tuniform.value = globalState;\n\t\t\tuniform.needsUpdate = numGlobalPlanes > 0;\n\n\t\t}\n\n\t\tscope.numPlanes = numGlobalPlanes;\n\t\tscope.numIntersection = 0;\n\n\t}\n\n\tfunction projectPlanes( planes, camera, dstOffset, skipTransform ) {\n\n\t\tconst nPlanes = planes !== null ? planes.length : 0;\n\t\tlet dstArray = null;\n\n\t\tif ( nPlanes !== 0 ) {\n\n\t\t\tdstArray = uniform.value;\n\n\t\t\tif ( skipTransform !== true || dstArray === null ) {\n\n\t\t\t\tconst flatSize = dstOffset + nPlanes * 4,\n\t\t\t\t\tviewMatrix = camera.matrixWorldInverse;\n\n\t\t\t\tviewNormalMatrix.getNormalMatrix( viewMatrix );\n\n\t\t\t\tif ( dstArray === null || dstArray.length < flatSize ) {\n\n\t\t\t\t\tdstArray = new Float32Array( flatSize );\n\n\t\t\t\t}\n\n\t\t\t\tfor ( let i = 0, i4 = dstOffset; i !== nPlanes; ++ i, i4 += 4 ) {\n\n\t\t\t\t\tplane.copy( planes[ i ] ).applyMatrix4( viewMatrix, viewNormalMatrix );\n\n\t\t\t\t\tplane.normal.toArray( dstArray, i4 );\n\t\t\t\t\tdstArray[ i4 + 3 ] = plane.constant;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tuniform.value = dstArray;\n\t\t\tuniform.needsUpdate = true;\n\n\t\t}\n\n\t\tscope.numPlanes = nPlanes;\n\t\tscope.numIntersection = 0;\n\n\t\treturn dstArray;\n\n\t}\n\n}\n\nfunction WebGLCubeMaps( renderer ) {\n\n\tlet cubemaps = new WeakMap();\n\n\tfunction mapTextureMapping( texture, mapping ) {\n\n\t\tif ( mapping === EquirectangularReflectionMapping ) {\n\n\t\t\ttexture.mapping = CubeReflectionMapping;\n\n\t\t} else if ( mapping === EquirectangularRefractionMapping ) {\n\n\t\t\ttexture.mapping = CubeRefractionMapping;\n\n\t\t}\n\n\t\treturn texture;\n\n\t}\n\n\tfunction get( texture ) {\n\n\t\tif ( texture && texture.isTexture ) {\n\n\t\t\tconst mapping = texture.mapping;\n\n\t\t\tif ( mapping === EquirectangularReflectionMapping || mapping === EquirectangularRefractionMapping ) {\n\n\t\t\t\tif ( cubemaps.has( texture ) ) {\n\n\t\t\t\t\tconst cubemap = cubemaps.get( texture ).texture;\n\t\t\t\t\treturn mapTextureMapping( cubemap, texture.mapping );\n\n\t\t\t\t} else {\n\n\t\t\t\t\tconst image = texture.image;\n\n\t\t\t\t\tif ( image && image.height > 0 ) {\n\n\t\t\t\t\t\tconst currentRenderList = renderer.getRenderList();\n\t\t\t\t\t\tconst currentRenderTarget = renderer.getRenderTarget();\n\n\t\t\t\t\t\tconst renderTarget = new WebGLCubeRenderTarget( image.height / 2 );\n\t\t\t\t\t\trenderTarget.fromEquirectangularTexture( renderer, texture );\n\t\t\t\t\t\tcubemaps.set( texture, renderTarget );\n\n\t\t\t\t\t\trenderer.setRenderTarget( currentRenderTarget );\n\t\t\t\t\t\trenderer.setRenderList( currentRenderList );\n\n\t\t\t\t\t\ttexture.addEventListener( 'dispose', onTextureDispose );\n\n\t\t\t\t\t\treturn mapTextureMapping( renderTarget.texture, texture.mapping );\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\t// image not yet ready. try the conversion next frame\n\n\t\t\t\t\t\treturn null;\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn texture;\n\n\t}\n\n\tfunction onTextureDispose( event ) {\n\n\t\tconst texture = event.target;\n\n\t\ttexture.removeEventListener( 'dispose', onTextureDispose );\n\n\t\tconst cubemap = cubemaps.get( texture );\n\n\t\tif ( cubemap !== undefined ) {\n\n\t\t\tcubemaps.delete( texture );\n\t\t\tcubemap.dispose();\n\n\t\t}\n\n\t}\n\n\tfunction dispose() {\n\n\t\tcubemaps = new WeakMap();\n\n\t}\n\n\treturn {\n\t\tget: get,\n\t\tdispose: dispose\n\t};\n\n}\n\nfunction WebGLExtensions( gl ) {\n\n\tconst extensions = {};\n\n\tfunction getExtension( name ) {\n\n\t\tif ( extensions[ name ] !== undefined ) {\n\n\t\t\treturn extensions[ name ];\n\n\t\t}\n\n\t\tlet extension;\n\n\t\tswitch ( name ) {\n\n\t\t\tcase 'WEBGL_depth_texture':\n\t\t\t\textension = gl.getExtension( 'WEBGL_depth_texture' ) || gl.getExtension( 'MOZ_WEBGL_depth_texture' ) || gl.getExtension( 'WEBKIT_WEBGL_depth_texture' );\n\t\t\t\tbreak;\n\n\t\t\tcase 'EXT_texture_filter_anisotropic':\n\t\t\t\textension = gl.getExtension( 'EXT_texture_filter_anisotropic' ) || gl.getExtension( 'MOZ_EXT_texture_filter_anisotropic' ) || gl.getExtension( 'WEBKIT_EXT_texture_filter_anisotropic' );\n\t\t\t\tbreak;\n\n\t\t\tcase 'WEBGL_compressed_texture_s3tc':\n\t\t\t\textension = gl.getExtension( 'WEBGL_compressed_texture_s3tc' ) || gl.getExtension( 'MOZ_WEBGL_compressed_texture_s3tc' ) || gl.getExtension( 'WEBKIT_WEBGL_compressed_texture_s3tc' );\n\t\t\t\tbreak;\n\n\t\t\tcase 'WEBGL_compressed_texture_pvrtc':\n\t\t\t\textension = gl.getExtension( 'WEBGL_compressed_texture_pvrtc' ) || gl.getExtension( 'WEBKIT_WEBGL_compressed_texture_pvrtc' );\n\t\t\t\tbreak;\n\n\t\t\tdefault:\n\t\t\t\textension = gl.getExtension( name );\n\n\t\t}\n\n\t\textensions[ name ] = extension;\n\n\t\treturn extension;\n\n\t}\n\n\treturn {\n\n\t\thas: function ( name ) {\n\n\t\t\treturn getExtension( name ) !== null;\n\n\t\t},\n\n\t\tinit: function ( capabilities ) {\n\n\t\t\tif ( capabilities.isWebGL2 ) {\n\n\t\t\t\tgetExtension( 'EXT_color_buffer_float' );\n\n\t\t\t} else {\n\n\t\t\t\tgetExtension( 'WEBGL_depth_texture' );\n\t\t\t\tgetExtension( 'OES_texture_float' );\n\t\t\t\tgetExtension( 'OES_texture_half_float' );\n\t\t\t\tgetExtension( 'OES_texture_half_float_linear' );\n\t\t\t\tgetExtension( 'OES_standard_derivatives' );\n\t\t\t\tgetExtension( 'OES_element_index_uint' );\n\t\t\t\tgetExtension( 'OES_vertex_array_object' );\n\t\t\t\tgetExtension( 'ANGLE_instanced_arrays' );\n\n\t\t\t}\n\n\t\t\tgetExtension( 'OES_texture_float_linear' );\n\t\t\tgetExtension( 'EXT_color_buffer_half_float' );\n\n\t\t},\n\n\t\tget: function ( name ) {\n\n\t\t\tconst extension = getExtension( name );\n\n\t\t\tif ( extension === null ) {\n\n\t\t\t\tconsole.warn( 'THREE.WebGLRenderer: ' + name + ' extension not supported.' );\n\n\t\t\t}\n\n\t\t\treturn extension;\n\n\t\t}\n\n\t};\n\n}\n\nfunction WebGLGeometries( gl, attributes, info, bindingStates ) {\n\n\tconst geometries = {};\n\tconst wireframeAttributes = new WeakMap();\n\n\tfunction onGeometryDispose( event ) {\n\n\t\tconst geometry = event.target;\n\n\t\tif ( geometry.index !== null ) {\n\n\t\t\tattributes.remove( geometry.index );\n\n\t\t}\n\n\t\tfor ( const name in geometry.attributes ) {\n\n\t\t\tattributes.remove( geometry.attributes[ name ] );\n\n\t\t}\n\n\t\tgeometry.removeEventListener( 'dispose', onGeometryDispose );\n\n\t\tdelete geometries[ geometry.id ];\n\n\t\tconst attribute = wireframeAttributes.get( geometry );\n\n\t\tif ( attribute ) {\n\n\t\t\tattributes.remove( attribute );\n\t\t\twireframeAttributes.delete( geometry );\n\n\t\t}\n\n\t\tbindingStates.releaseStatesOfGeometry( geometry );\n\n\t\tif ( geometry.isInstancedBufferGeometry === true ) {\n\n\t\t\tdelete geometry._maxInstanceCount;\n\n\t\t}\n\n\t\t//\n\n\t\tinfo.memory.geometries --;\n\n\t}\n\n\tfunction get( object, geometry ) {\n\n\t\tif ( geometries[ geometry.id ] === true ) return geometry;\n\n\t\tgeometry.addEventListener( 'dispose', onGeometryDispose );\n\n\t\tgeometries[ geometry.id ] = true;\n\n\t\tinfo.memory.geometries ++;\n\n\t\treturn geometry;\n\n\t}\n\n\tfunction update( geometry ) {\n\n\t\tconst geometryAttributes = geometry.attributes;\n\n\t\t// Updating index buffer in VAO now. See WebGLBindingStates.\n\n\t\tfor ( const name in geometryAttributes ) {\n\n\t\t\tattributes.update( geometryAttributes[ name ], 34962 );\n\n\t\t}\n\n\t\t// morph targets\n\n\t\tconst morphAttributes = geometry.morphAttributes;\n\n\t\tfor ( const name in morphAttributes ) {\n\n\t\t\tconst array = morphAttributes[ name ];\n\n\t\t\tfor ( let i = 0, l = array.length; i < l; i ++ ) {\n\n\t\t\t\tattributes.update( array[ i ], 34962 );\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\tfunction updateWireframeAttribute( geometry ) {\n\n\t\tconst indices = [];\n\n\t\tconst geometryIndex = geometry.index;\n\t\tconst geometryPosition = geometry.attributes.position;\n\t\tlet version = 0;\n\n\t\tif ( geometryIndex !== null ) {\n\n\t\t\tconst array = geometryIndex.array;\n\t\t\tversion = geometryIndex.version;\n\n\t\t\tfor ( let i = 0, l = array.length; i < l; i += 3 ) {\n\n\t\t\t\tconst a = array[ i + 0 ];\n\t\t\t\tconst b = array[ i + 1 ];\n\t\t\t\tconst c = array[ i + 2 ];\n\n\t\t\t\tindices.push( a, b, b, c, c, a );\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\tconst array = geometryPosition.array;\n\t\t\tversion = geometryPosition.version;\n\n\t\t\tfor ( let i = 0, l = ( array.length / 3 ) - 1; i < l; i += 3 ) {\n\n\t\t\t\tconst a = i + 0;\n\t\t\t\tconst b = i + 1;\n\t\t\t\tconst c = i + 2;\n\n\t\t\t\tindices.push( a, b, b, c, c, a );\n\n\t\t\t}\n\n\t\t}\n\n\t\tconst attribute = new ( arrayMax( indices ) > 65535 ? Uint32BufferAttribute : Uint16BufferAttribute )( indices, 1 );\n\t\tattribute.version = version;\n\n\t\t// Updating index buffer in VAO now. See WebGLBindingStates\n\n\t\t//\n\n\t\tconst previousAttribute = wireframeAttributes.get( geometry );\n\n\t\tif ( previousAttribute ) attributes.remove( previousAttribute );\n\n\t\t//\n\n\t\twireframeAttributes.set( geometry, attribute );\n\n\t}\n\n\tfunction getWireframeAttribute( geometry ) {\n\n\t\tconst currentAttribute = wireframeAttributes.get( geometry );\n\n\t\tif ( currentAttribute ) {\n\n\t\t\tconst geometryIndex = geometry.index;\n\n\t\t\tif ( geometryIndex !== null ) {\n\n\t\t\t\t// if the attribute is obsolete, create a new one\n\n\t\t\t\tif ( currentAttribute.version < geometryIndex.version ) {\n\n\t\t\t\t\tupdateWireframeAttribute( geometry );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\tupdateWireframeAttribute( geometry );\n\n\t\t}\n\n\t\treturn wireframeAttributes.get( geometry );\n\n\t}\n\n\treturn {\n\n\t\tget: get,\n\t\tupdate: update,\n\n\t\tgetWireframeAttribute: getWireframeAttribute\n\n\t};\n\n}\n\nfunction WebGLIndexedBufferRenderer( gl, extensions, info, capabilities ) {\n\n\tconst isWebGL2 = capabilities.isWebGL2;\n\n\tlet mode;\n\n\tfunction setMode( value ) {\n\n\t\tmode = value;\n\n\t}\n\n\tlet type, bytesPerElement;\n\n\tfunction setIndex( value ) {\n\n\t\ttype = value.type;\n\t\tbytesPerElement = value.bytesPerElement;\n\n\t}\n\n\tfunction render( start, count ) {\n\n\t\tgl.drawElements( mode, count, type, start * bytesPerElement );\n\n\t\tinfo.update( count, mode, 1 );\n\n\t}\n\n\tfunction renderInstances( start, count, primcount ) {\n\n\t\tif ( primcount === 0 ) return;\n\n\t\tlet extension, methodName;\n\n\t\tif ( isWebGL2 ) {\n\n\t\t\textension = gl;\n\t\t\tmethodName = 'drawElementsInstanced';\n\n\t\t} else {\n\n\t\t\textension = extensions.get( 'ANGLE_instanced_arrays' );\n\t\t\tmethodName = 'drawElementsInstancedANGLE';\n\n\t\t\tif ( extension === null ) {\n\n\t\t\t\tconsole.error( 'THREE.WebGLIndexedBufferRenderer: using THREE.InstancedBufferGeometry but hardware does not support extension ANGLE_instanced_arrays.' );\n\t\t\t\treturn;\n\n\t\t\t}\n\n\t\t}\n\n\t\textension[ methodName ]( mode, count, type, start * bytesPerElement, primcount );\n\n\t\tinfo.update( count, mode, primcount );\n\n\t}\n\n\t//\n\n\tthis.setMode = setMode;\n\tthis.setIndex = setIndex;\n\tthis.render = render;\n\tthis.renderInstances = renderInstances;\n\n}\n\nfunction WebGLInfo( gl ) {\n\n\tconst memory = {\n\t\tgeometries: 0,\n\t\ttextures: 0\n\t};\n\n\tconst render = {\n\t\tframe: 0,\n\t\tcalls: 0,\n\t\ttriangles: 0,\n\t\tpoints: 0,\n\t\tlines: 0\n\t};\n\n\tfunction update( count, mode, instanceCount ) {\n\n\t\trender.calls ++;\n\n\t\tswitch ( mode ) {\n\n\t\t\tcase 4:\n\t\t\t\trender.triangles += instanceCount * ( count / 3 );\n\t\t\t\tbreak;\n\n\t\t\tcase 1:\n\t\t\t\trender.lines += instanceCount * ( count / 2 );\n\t\t\t\tbreak;\n\n\t\t\tcase 3:\n\t\t\t\trender.lines += instanceCount * ( count - 1 );\n\t\t\t\tbreak;\n\n\t\t\tcase 2:\n\t\t\t\trender.lines += instanceCount * count;\n\t\t\t\tbreak;\n\n\t\t\tcase 0:\n\t\t\t\trender.points += instanceCount * count;\n\t\t\t\tbreak;\n\n\t\t\tdefault:\n\t\t\t\tconsole.error( 'THREE.WebGLInfo: Unknown draw mode:', mode );\n\t\t\t\tbreak;\n\n\t\t}\n\n\t}\n\n\tfunction reset() {\n\n\t\trender.frame ++;\n\t\trender.calls = 0;\n\t\trender.triangles = 0;\n\t\trender.points = 0;\n\t\trender.lines = 0;\n\n\t}\n\n\treturn {\n\t\tmemory: memory,\n\t\trender: render,\n\t\tprograms: null,\n\t\tautoReset: true,\n\t\treset: reset,\n\t\tupdate: update\n\t};\n\n}\n\nfunction numericalSort( a, b ) {\n\n\treturn a[ 0 ] - b[ 0 ];\n\n}\n\nfunction absNumericalSort( a, b ) {\n\n\treturn Math.abs( b[ 1 ] ) - Math.abs( a[ 1 ] );\n\n}\n\nfunction WebGLMorphtargets( gl ) {\n\n\tconst influencesList = {};\n\tconst morphInfluences = new Float32Array( 8 );\n\n\tconst workInfluences = [];\n\n\tfor ( let i = 0; i < 8; i ++ ) {\n\n\t\tworkInfluences[ i ] = [ i, 0 ];\n\n\t}\n\n\tfunction update( object, geometry, material, program ) {\n\n\t\tconst objectInfluences = object.morphTargetInfluences;\n\n\t\t// When object doesn't have morph target influences defined, we treat it as a 0-length array\n\t\t// This is important to make sure we set up morphTargetBaseInfluence / morphTargetInfluences\n\n\t\tconst length = objectInfluences === undefined ? 0 : objectInfluences.length;\n\n\t\tlet influences = influencesList[ geometry.id ];\n\n\t\tif ( influences === undefined ) {\n\n\t\t\t// initialise list\n\n\t\t\tinfluences = [];\n\n\t\t\tfor ( let i = 0; i < length; i ++ ) {\n\n\t\t\t\tinfluences[ i ] = [ i, 0 ];\n\n\t\t\t}\n\n\t\t\tinfluencesList[ geometry.id ] = influences;\n\n\t\t}\n\n\t\t// Collect influences\n\n\t\tfor ( let i = 0; i < length; i ++ ) {\n\n\t\t\tconst influence = influences[ i ];\n\n\t\t\tinfluence[ 0 ] = i;\n\t\t\tinfluence[ 1 ] = objectInfluences[ i ];\n\n\t\t}\n\n\t\tinfluences.sort( absNumericalSort );\n\n\t\tfor ( let i = 0; i < 8; i ++ ) {\n\n\t\t\tif ( i < length && influences[ i ][ 1 ] ) {\n\n\t\t\t\tworkInfluences[ i ][ 0 ] = influences[ i ][ 0 ];\n\t\t\t\tworkInfluences[ i ][ 1 ] = influences[ i ][ 1 ];\n\n\t\t\t} else {\n\n\t\t\t\tworkInfluences[ i ][ 0 ] = Number.MAX_SAFE_INTEGER;\n\t\t\t\tworkInfluences[ i ][ 1 ] = 0;\n\n\t\t\t}\n\n\t\t}\n\n\t\tworkInfluences.sort( numericalSort );\n\n\t\tconst morphTargets = material.morphTargets && geometry.morphAttributes.position;\n\t\tconst morphNormals = material.morphNormals && geometry.morphAttributes.normal;\n\n\t\tlet morphInfluencesSum = 0;\n\n\t\tfor ( let i = 0; i < 8; i ++ ) {\n\n\t\t\tconst influence = workInfluences[ i ];\n\t\t\tconst index = influence[ 0 ];\n\t\t\tconst value = influence[ 1 ];\n\n\t\t\tif ( index !== Number.MAX_SAFE_INTEGER && value ) {\n\n\t\t\t\tif ( morphTargets && geometry.getAttribute( 'morphTarget' + i ) !== morphTargets[ index ] ) {\n\n\t\t\t\t\tgeometry.setAttribute( 'morphTarget' + i, morphTargets[ index ] );\n\n\t\t\t\t}\n\n\t\t\t\tif ( morphNormals && geometry.getAttribute( 'morphNormal' + i ) !== morphNormals[ index ] ) {\n\n\t\t\t\t\tgeometry.setAttribute( 'morphNormal' + i, morphNormals[ index ] );\n\n\t\t\t\t}\n\n\t\t\t\tmorphInfluences[ i ] = value;\n\t\t\t\tmorphInfluencesSum += value;\n\n\t\t\t} else {\n\n\t\t\t\tif ( morphTargets && geometry.hasAttribute( 'morphTarget' + i ) === true ) {\n\n\t\t\t\t\tgeometry.deleteAttribute( 'morphTarget' + i );\n\n\t\t\t\t}\n\n\t\t\t\tif ( morphNormals && geometry.hasAttribute( 'morphNormal' + i ) === true ) {\n\n\t\t\t\t\tgeometry.deleteAttribute( 'morphNormal' + i );\n\n\t\t\t\t}\n\n\t\t\t\tmorphInfluences[ i ] = 0;\n\n\t\t\t}\n\n\t\t}\n\n\t\t// GLSL shader uses formula baseinfluence * base + sum(target * influence)\n\t\t// This allows us to switch between absolute morphs and relative morphs without changing shader code\n\t\t// When baseinfluence = 1 - sum(influence), the above is equivalent to sum((target - base) * influence)\n\t\tconst morphBaseInfluence = geometry.morphTargetsRelative ? 1 : 1 - morphInfluencesSum;\n\n\t\tprogram.getUniforms().setValue( gl, 'morphTargetBaseInfluence', morphBaseInfluence );\n\t\tprogram.getUniforms().setValue( gl, 'morphTargetInfluences', morphInfluences );\n\n\t}\n\n\treturn {\n\n\t\tupdate: update\n\n\t};\n\n}\n\nfunction WebGLObjects( gl, geometries, attributes, info ) {\n\n\tlet updateMap = new WeakMap();\n\n\tfunction update( object ) {\n\n\t\tconst frame = info.render.frame;\n\n\t\tconst geometry = object.geometry;\n\t\tconst buffergeometry = geometries.get( object, geometry );\n\n\t\t// Update once per frame\n\n\t\tif ( updateMap.get( buffergeometry ) !== frame ) {\n\n\t\t\tgeometries.update( buffergeometry );\n\n\t\t\tupdateMap.set( buffergeometry, frame );\n\n\t\t}\n\n\t\tif ( object.isInstancedMesh ) {\n\n\t\t\tif ( object.hasEventListener( 'dispose', onInstancedMeshDispose ) === false ) {\n\n\t\t\t\tobject.addEventListener( 'dispose', onInstancedMeshDispose );\n\n\t\t\t}\n\n\t\t\tattributes.update( object.instanceMatrix, 34962 );\n\n\t\t\tif ( object.instanceColor !== null ) {\n\n\t\t\t\tattributes.update( object.instanceColor, 34962 );\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn buffergeometry;\n\n\t}\n\n\tfunction dispose() {\n\n\t\tupdateMap = new WeakMap();\n\n\t}\n\n\tfunction onInstancedMeshDispose( event ) {\n\n\t\tconst instancedMesh = event.target;\n\n\t\tinstancedMesh.removeEventListener( 'dispose', onInstancedMeshDispose );\n\n\t\tattributes.remove( instancedMesh.instanceMatrix );\n\n\t\tif ( instancedMesh.instanceColor !== null ) attributes.remove( instancedMesh.instanceColor );\n\n\t}\n\n\treturn {\n\n\t\tupdate: update,\n\t\tdispose: dispose\n\n\t};\n\n}\n\nfunction DataTexture2DArray( data = null, width = 1, height = 1, depth = 1 ) {\n\n\tTexture.call( this, null );\n\n\tthis.image = { data, width, height, depth };\n\n\tthis.magFilter = NearestFilter;\n\tthis.minFilter = NearestFilter;\n\n\tthis.wrapR = ClampToEdgeWrapping;\n\n\tthis.generateMipmaps = false;\n\tthis.flipY = false;\n\n\tthis.needsUpdate = true;\n\n}\n\nDataTexture2DArray.prototype = Object.create( Texture.prototype );\nDataTexture2DArray.prototype.constructor = DataTexture2DArray;\nDataTexture2DArray.prototype.isDataTexture2DArray = true;\n\nfunction DataTexture3D( data = null, width = 1, height = 1, depth = 1 ) {\n\n\t// We're going to add .setXXX() methods for setting properties later.\n\t// Users can still set in DataTexture3D directly.\n\t//\n\t//\tconst texture = new THREE.DataTexture3D( data, width, height, depth );\n\t// \ttexture.anisotropy = 16;\n\t//\n\t// See #14839\n\n\tTexture.call( this, null );\n\n\tthis.image = { data, width, height, depth };\n\n\tthis.magFilter = NearestFilter;\n\tthis.minFilter = NearestFilter;\n\n\tthis.wrapR = ClampToEdgeWrapping;\n\n\tthis.generateMipmaps = false;\n\tthis.flipY = false;\n\n\tthis.needsUpdate = true;\n\n\n}\n\nDataTexture3D.prototype = Object.create( Texture.prototype );\nDataTexture3D.prototype.constructor = DataTexture3D;\nDataTexture3D.prototype.isDataTexture3D = true;\n\n/**\n * Uniforms of a program.\n * Those form a tree structure with a special top-level container for the root,\n * which you get by calling 'new WebGLUniforms( gl, program )'.\n *\n *\n * Properties of inner nodes including the top-level container:\n *\n * .seq - array of nested uniforms\n * .map - nested uniforms by name\n *\n *\n * Methods of all nodes except the top-level container:\n *\n * .setValue( gl, value, [textures] )\n *\n * \t\tuploads a uniform value(s)\n *  \tthe 'textures' parameter is needed for sampler uniforms\n *\n *\n * Static methods of the top-level container (textures factorizations):\n *\n * .upload( gl, seq, values, textures )\n *\n * \t\tsets uniforms in 'seq' to 'values[id].value'\n *\n * .seqWithValue( seq, values ) : filteredSeq\n *\n * \t\tfilters 'seq' entries with corresponding entry in values\n *\n *\n * Methods of the top-level container (textures factorizations):\n *\n * .setValue( gl, name, value, textures )\n *\n * \t\tsets uniform with  name 'name' to 'value'\n *\n * .setOptional( gl, obj, prop )\n *\n * \t\tlike .set for an optional property of the object\n *\n */\n\nconst emptyTexture = new Texture();\nconst emptyTexture2dArray = new DataTexture2DArray();\nconst emptyTexture3d = new DataTexture3D();\nconst emptyCubeTexture = new CubeTexture();\n\n// --- Utilities ---\n\n// Array Caches (provide typed arrays for temporary by size)\n\nconst arrayCacheF32 = [];\nconst arrayCacheI32 = [];\n\n// Float32Array caches used for uploading Matrix uniforms\n\nconst mat4array = new Float32Array( 16 );\nconst mat3array = new Float32Array( 9 );\nconst mat2array = new Float32Array( 4 );\n\n// Flattening for arrays of vectors and matrices\n\nfunction flatten( array, nBlocks, blockSize ) {\n\n\tconst firstElem = array[ 0 ];\n\n\tif ( firstElem <= 0 || firstElem > 0 ) return array;\n\t// unoptimized: ! isNaN( firstElem )\n\t// see http://jacksondunstan.com/articles/983\n\n\tconst n = nBlocks * blockSize;\n\tlet r = arrayCacheF32[ n ];\n\n\tif ( r === undefined ) {\n\n\t\tr = new Float32Array( n );\n\t\tarrayCacheF32[ n ] = r;\n\n\t}\n\n\tif ( nBlocks !== 0 ) {\n\n\t\tfirstElem.toArray( r, 0 );\n\n\t\tfor ( let i = 1, offset = 0; i !== nBlocks; ++ i ) {\n\n\t\t\toffset += blockSize;\n\t\t\tarray[ i ].toArray( r, offset );\n\n\t\t}\n\n\t}\n\n\treturn r;\n\n}\n\nfunction arraysEqual( a, b ) {\n\n\tif ( a.length !== b.length ) return false;\n\n\tfor ( let i = 0, l = a.length; i < l; i ++ ) {\n\n\t\tif ( a[ i ] !== b[ i ] ) return false;\n\n\t}\n\n\treturn true;\n\n}\n\nfunction copyArray( a, b ) {\n\n\tfor ( let i = 0, l = b.length; i < l; i ++ ) {\n\n\t\ta[ i ] = b[ i ];\n\n\t}\n\n}\n\n// Texture unit allocation\n\nfunction allocTexUnits( textures, n ) {\n\n\tlet r = arrayCacheI32[ n ];\n\n\tif ( r === undefined ) {\n\n\t\tr = new Int32Array( n );\n\t\tarrayCacheI32[ n ] = r;\n\n\t}\n\n\tfor ( let i = 0; i !== n; ++ i ) {\n\n\t\tr[ i ] = textures.allocateTextureUnit();\n\n\t}\n\n\treturn r;\n\n}\n\n// --- Setters ---\n\n// Note: Defining these methods externally, because they come in a bunch\n// and this way their names minify.\n\n// Single scalar\n\nfunction setValueV1f( gl, v ) {\n\n\tconst cache = this.cache;\n\n\tif ( cache[ 0 ] === v ) return;\n\n\tgl.uniform1f( this.addr, v );\n\n\tcache[ 0 ] = v;\n\n}\n\n// Single float vector (from flat array or THREE.VectorN)\n\nfunction setValueV2f( gl, v ) {\n\n\tconst cache = this.cache;\n\n\tif ( v.x !== undefined ) {\n\n\t\tif ( cache[ 0 ] !== v.x || cache[ 1 ] !== v.y ) {\n\n\t\t\tgl.uniform2f( this.addr, v.x, v.y );\n\n\t\t\tcache[ 0 ] = v.x;\n\t\t\tcache[ 1 ] = v.y;\n\n\t\t}\n\n\t} else {\n\n\t\tif ( arraysEqual( cache, v ) ) return;\n\n\t\tgl.uniform2fv( this.addr, v );\n\n\t\tcopyArray( cache, v );\n\n\t}\n\n}\n\nfunction setValueV3f( gl, v ) {\n\n\tconst cache = this.cache;\n\n\tif ( v.x !== undefined ) {\n\n\t\tif ( cache[ 0 ] !== v.x || cache[ 1 ] !== v.y || cache[ 2 ] !== v.z ) {\n\n\t\t\tgl.uniform3f( this.addr, v.x, v.y, v.z );\n\n\t\t\tcache[ 0 ] = v.x;\n\t\t\tcache[ 1 ] = v.y;\n\t\t\tcache[ 2 ] = v.z;\n\n\t\t}\n\n\t} else if ( v.r !== undefined ) {\n\n\t\tif ( cache[ 0 ] !== v.r || cache[ 1 ] !== v.g || cache[ 2 ] !== v.b ) {\n\n\t\t\tgl.uniform3f( this.addr, v.r, v.g, v.b );\n\n\t\t\tcache[ 0 ] = v.r;\n\t\t\tcache[ 1 ] = v.g;\n\t\t\tcache[ 2 ] = v.b;\n\n\t\t}\n\n\t} else {\n\n\t\tif ( arraysEqual( cache, v ) ) return;\n\n\t\tgl.uniform3fv( this.addr, v );\n\n\t\tcopyArray( cache, v );\n\n\t}\n\n}\n\nfunction setValueV4f( gl, v ) {\n\n\tconst cache = this.cache;\n\n\tif ( v.x !== undefined ) {\n\n\t\tif ( cache[ 0 ] !== v.x || cache[ 1 ] !== v.y || cache[ 2 ] !== v.z || cache[ 3 ] !== v.w ) {\n\n\t\t\tgl.uniform4f( this.addr, v.x, v.y, v.z, v.w );\n\n\t\t\tcache[ 0 ] = v.x;\n\t\t\tcache[ 1 ] = v.y;\n\t\t\tcache[ 2 ] = v.z;\n\t\t\tcache[ 3 ] = v.w;\n\n\t\t}\n\n\t} else {\n\n\t\tif ( arraysEqual( cache, v ) ) return;\n\n\t\tgl.uniform4fv( this.addr, v );\n\n\t\tcopyArray( cache, v );\n\n\t}\n\n}\n\n// Single matrix (from flat array or MatrixN)\n\nfunction setValueM2( gl, v ) {\n\n\tconst cache = this.cache;\n\tconst elements = v.elements;\n\n\tif ( elements === undefined ) {\n\n\t\tif ( arraysEqual( cache, v ) ) return;\n\n\t\tgl.uniformMatrix2fv( this.addr, false, v );\n\n\t\tcopyArray( cache, v );\n\n\t} else {\n\n\t\tif ( arraysEqual( cache, elements ) ) return;\n\n\t\tmat2array.set( elements );\n\n\t\tgl.uniformMatrix2fv( this.addr, false, mat2array );\n\n\t\tcopyArray( cache, elements );\n\n\t}\n\n}\n\nfunction setValueM3( gl, v ) {\n\n\tconst cache = this.cache;\n\tconst elements = v.elements;\n\n\tif ( elements === undefined ) {\n\n\t\tif ( arraysEqual( cache, v ) ) return;\n\n\t\tgl.uniformMatrix3fv( this.addr, false, v );\n\n\t\tcopyArray( cache, v );\n\n\t} else {\n\n\t\tif ( arraysEqual( cache, elements ) ) return;\n\n\t\tmat3array.set( elements );\n\n\t\tgl.uniformMatrix3fv( this.addr, false, mat3array );\n\n\t\tcopyArray( cache, elements );\n\n\t}\n\n}\n\nfunction setValueM4( gl, v ) {\n\n\tconst cache = this.cache;\n\tconst elements = v.elements;\n\n\tif ( elements === undefined ) {\n\n\t\tif ( arraysEqual( cache, v ) ) return;\n\n\t\tgl.uniformMatrix4fv( this.addr, false, v );\n\n\t\tcopyArray( cache, v );\n\n\t} else {\n\n\t\tif ( arraysEqual( cache, elements ) ) return;\n\n\t\tmat4array.set( elements );\n\n\t\tgl.uniformMatrix4fv( this.addr, false, mat4array );\n\n\t\tcopyArray( cache, elements );\n\n\t}\n\n}\n\n// Single texture (2D / Cube)\n\nfunction setValueT1( gl, v, textures ) {\n\n\tconst cache = this.cache;\n\tconst unit = textures.allocateTextureUnit();\n\n\tif ( cache[ 0 ] !== unit ) {\n\n\t\tgl.uniform1i( this.addr, unit );\n\t\tcache[ 0 ] = unit;\n\n\t}\n\n\ttextures.safeSetTexture2D( v || emptyTexture, unit );\n\n}\n\nfunction setValueT2DArray1( gl, v, textures ) {\n\n\tconst cache = this.cache;\n\tconst unit = textures.allocateTextureUnit();\n\n\tif ( cache[ 0 ] !== unit ) {\n\n\t\tgl.uniform1i( this.addr, unit );\n\t\tcache[ 0 ] = unit;\n\n\t}\n\n\ttextures.setTexture2DArray( v || emptyTexture2dArray, unit );\n\n}\n\nfunction setValueT3D1( gl, v, textures ) {\n\n\tconst cache = this.cache;\n\tconst unit = textures.allocateTextureUnit();\n\n\tif ( cache[ 0 ] !== unit ) {\n\n\t\tgl.uniform1i( this.addr, unit );\n\t\tcache[ 0 ] = unit;\n\n\t}\n\n\ttextures.setTexture3D( v || emptyTexture3d, unit );\n\n}\n\nfunction setValueT6( gl, v, textures ) {\n\n\tconst cache = this.cache;\n\tconst unit = textures.allocateTextureUnit();\n\n\tif ( cache[ 0 ] !== unit ) {\n\n\t\tgl.uniform1i( this.addr, unit );\n\t\tcache[ 0 ] = unit;\n\n\t}\n\n\ttextures.safeSetTextureCube( v || emptyCubeTexture, unit );\n\n}\n\n// Integer / Boolean vectors or arrays thereof (always flat arrays)\n\nfunction setValueV1i( gl, v ) {\n\n\tconst cache = this.cache;\n\n\tif ( cache[ 0 ] === v ) return;\n\n\tgl.uniform1i( this.addr, v );\n\n\tcache[ 0 ] = v;\n\n}\n\nfunction setValueV2i( gl, v ) {\n\n\tconst cache = this.cache;\n\n\tif ( arraysEqual( cache, v ) ) return;\n\n\tgl.uniform2iv( this.addr, v );\n\n\tcopyArray( cache, v );\n\n}\n\nfunction setValueV3i( gl, v ) {\n\n\tconst cache = this.cache;\n\n\tif ( arraysEqual( cache, v ) ) return;\n\n\tgl.uniform3iv( this.addr, v );\n\n\tcopyArray( cache, v );\n\n}\n\nfunction setValueV4i( gl, v ) {\n\n\tconst cache = this.cache;\n\n\tif ( arraysEqual( cache, v ) ) return;\n\n\tgl.uniform4iv( this.addr, v );\n\n\tcopyArray( cache, v );\n\n}\n\n// uint\n\nfunction setValueV1ui( gl, v ) {\n\n\tconst cache = this.cache;\n\n\tif ( cache[ 0 ] === v ) return;\n\n\tgl.uniform1ui( this.addr, v );\n\n\tcache[ 0 ] = v;\n\n}\n\n// Helper to pick the right setter for the singular case\n\nfunction getSingularSetter( type ) {\n\n\tswitch ( type ) {\n\n\t\tcase 0x1406: return setValueV1f; // FLOAT\n\t\tcase 0x8b50: return setValueV2f; // _VEC2\n\t\tcase 0x8b51: return setValueV3f; // _VEC3\n\t\tcase 0x8b52: return setValueV4f; // _VEC4\n\n\t\tcase 0x8b5a: return setValueM2; // _MAT2\n\t\tcase 0x8b5b: return setValueM3; // _MAT3\n\t\tcase 0x8b5c: return setValueM4; // _MAT4\n\n\t\tcase 0x1404: case 0x8b56: return setValueV1i; // INT, BOOL\n\t\tcase 0x8b53: case 0x8b57: return setValueV2i; // _VEC2\n\t\tcase 0x8b54: case 0x8b58: return setValueV3i; // _VEC3\n\t\tcase 0x8b55: case 0x8b59: return setValueV4i; // _VEC4\n\n\t\tcase 0x1405: return setValueV1ui; // UINT\n\n\t\tcase 0x8b5e: // SAMPLER_2D\n\t\tcase 0x8d66: // SAMPLER_EXTERNAL_OES\n\t\tcase 0x8dca: // INT_SAMPLER_2D\n\t\tcase 0x8dd2: // UNSIGNED_INT_SAMPLER_2D\n\t\tcase 0x8b62: // SAMPLER_2D_SHADOW\n\t\t\treturn setValueT1;\n\n\t\tcase 0x8b5f: // SAMPLER_3D\n\t\tcase 0x8dcb: // INT_SAMPLER_3D\n\t\tcase 0x8dd3: // UNSIGNED_INT_SAMPLER_3D\n\t\t\treturn setValueT3D1;\n\n\t\tcase 0x8b60: // SAMPLER_CUBE\n\t\tcase 0x8dcc: // INT_SAMPLER_CUBE\n\t\tcase 0x8dd4: // UNSIGNED_INT_SAMPLER_CUBE\n\t\tcase 0x8dc5: // SAMPLER_CUBE_SHADOW\n\t\t\treturn setValueT6;\n\n\t\tcase 0x8dc1: // SAMPLER_2D_ARRAY\n\t\tcase 0x8dcf: // INT_SAMPLER_2D_ARRAY\n\t\tcase 0x8dd7: // UNSIGNED_INT_SAMPLER_2D_ARRAY\n\t\tcase 0x8dc4: // SAMPLER_2D_ARRAY_SHADOW\n\t\t\treturn setValueT2DArray1;\n\n\t}\n\n}\n\n// Array of scalars\nfunction setValueV1fArray( gl, v ) {\n\n\tgl.uniform1fv( this.addr, v );\n\n}\n\n// Integer / Boolean vectors or arrays thereof (always flat arrays)\nfunction setValueV1iArray( gl, v ) {\n\n\tgl.uniform1iv( this.addr, v );\n\n}\n\nfunction setValueV2iArray( gl, v ) {\n\n\tgl.uniform2iv( this.addr, v );\n\n}\n\nfunction setValueV3iArray( gl, v ) {\n\n\tgl.uniform3iv( this.addr, v );\n\n}\n\nfunction setValueV4iArray( gl, v ) {\n\n\tgl.uniform4iv( this.addr, v );\n\n}\n\n\n// Array of vectors (flat or from THREE classes)\n\nfunction setValueV2fArray( gl, v ) {\n\n\tconst data = flatten( v, this.size, 2 );\n\n\tgl.uniform2fv( this.addr, data );\n\n}\n\nfunction setValueV3fArray( gl, v ) {\n\n\tconst data = flatten( v, this.size, 3 );\n\n\tgl.uniform3fv( this.addr, data );\n\n}\n\nfunction setValueV4fArray( gl, v ) {\n\n\tconst data = flatten( v, this.size, 4 );\n\n\tgl.uniform4fv( this.addr, data );\n\n}\n\n// Array of matrices (flat or from THREE clases)\n\nfunction setValueM2Array( gl, v ) {\n\n\tconst data = flatten( v, this.size, 4 );\n\n\tgl.uniformMatrix2fv( this.addr, false, data );\n\n}\n\nfunction setValueM3Array( gl, v ) {\n\n\tconst data = flatten( v, this.size, 9 );\n\n\tgl.uniformMatrix3fv( this.addr, false, data );\n\n}\n\nfunction setValueM4Array( gl, v ) {\n\n\tconst data = flatten( v, this.size, 16 );\n\n\tgl.uniformMatrix4fv( this.addr, false, data );\n\n}\n\n// Array of textures (2D / Cube)\n\nfunction setValueT1Array( gl, v, textures ) {\n\n\tconst n = v.length;\n\n\tconst units = allocTexUnits( textures, n );\n\n\tgl.uniform1iv( this.addr, units );\n\n\tfor ( let i = 0; i !== n; ++ i ) {\n\n\t\ttextures.safeSetTexture2D( v[ i ] || emptyTexture, units[ i ] );\n\n\t}\n\n}\n\nfunction setValueT6Array( gl, v, textures ) {\n\n\tconst n = v.length;\n\n\tconst units = allocTexUnits( textures, n );\n\n\tgl.uniform1iv( this.addr, units );\n\n\tfor ( let i = 0; i !== n; ++ i ) {\n\n\t\ttextures.safeSetTextureCube( v[ i ] || emptyCubeTexture, units[ i ] );\n\n\t}\n\n}\n\n// Helper to pick the right setter for a pure (bottom-level) array\n\nfunction getPureArraySetter( type ) {\n\n\tswitch ( type ) {\n\n\t\tcase 0x1406: return setValueV1fArray; // FLOAT\n\t\tcase 0x8b50: return setValueV2fArray; // _VEC2\n\t\tcase 0x8b51: return setValueV3fArray; // _VEC3\n\t\tcase 0x8b52: return setValueV4fArray; // _VEC4\n\n\t\tcase 0x8b5a: return setValueM2Array; // _MAT2\n\t\tcase 0x8b5b: return setValueM3Array; // _MAT3\n\t\tcase 0x8b5c: return setValueM4Array; // _MAT4\n\n\t\tcase 0x1404: case 0x8b56: return setValueV1iArray; // INT, BOOL\n\t\tcase 0x8b53: case 0x8b57: return setValueV2iArray; // _VEC2\n\t\tcase 0x8b54: case 0x8b58: return setValueV3iArray; // _VEC3\n\t\tcase 0x8b55: case 0x8b59: return setValueV4iArray; // _VEC4\n\n\t\tcase 0x8b5e: // SAMPLER_2D\n\t\tcase 0x8d66: // SAMPLER_EXTERNAL_OES\n\t\tcase 0x8dca: // INT_SAMPLER_2D\n\t\tcase 0x8dd2: // UNSIGNED_INT_SAMPLER_2D\n\t\tcase 0x8b62: // SAMPLER_2D_SHADOW\n\t\t\treturn setValueT1Array;\n\n\t\tcase 0x8b60: // SAMPLER_CUBE\n\t\tcase 0x8dcc: // INT_SAMPLER_CUBE\n\t\tcase 0x8dd4: // UNSIGNED_INT_SAMPLER_CUBE\n\t\tcase 0x8dc5: // SAMPLER_CUBE_SHADOW\n\t\t\treturn setValueT6Array;\n\n\t}\n\n}\n\n// --- Uniform Classes ---\n\nfunction SingleUniform( id, activeInfo, addr ) {\n\n\tthis.id = id;\n\tthis.addr = addr;\n\tthis.cache = [];\n\tthis.setValue = getSingularSetter( activeInfo.type );\n\n\t// this.path = activeInfo.name; // DEBUG\n\n}\n\nfunction PureArrayUniform( id, activeInfo, addr ) {\n\n\tthis.id = id;\n\tthis.addr = addr;\n\tthis.cache = [];\n\tthis.size = activeInfo.size;\n\tthis.setValue = getPureArraySetter( activeInfo.type );\n\n\t// this.path = activeInfo.name; // DEBUG\n\n}\n\nPureArrayUniform.prototype.updateCache = function ( data ) {\n\n\tconst cache = this.cache;\n\n\tif ( data instanceof Float32Array && cache.length !== data.length ) {\n\n\t\tthis.cache = new Float32Array( data.length );\n\n\t}\n\n\tcopyArray( cache, data );\n\n};\n\nfunction StructuredUniform( id ) {\n\n\tthis.id = id;\n\n\tthis.seq = [];\n\tthis.map = {};\n\n}\n\nStructuredUniform.prototype.setValue = function ( gl, value, textures ) {\n\n\tconst seq = this.seq;\n\n\tfor ( let i = 0, n = seq.length; i !== n; ++ i ) {\n\n\t\tconst u = seq[ i ];\n\t\tu.setValue( gl, value[ u.id ], textures );\n\n\t}\n\n};\n\n// --- Top-level ---\n\n// Parser - builds up the property tree from the path strings\n\nconst RePathPart = /(\\w+)(\\])?(\\[|\\.)?/g;\n\n// extracts\n// \t- the identifier (member name or array index)\n//  - followed by an optional right bracket (found when array index)\n//  - followed by an optional left bracket or dot (type of subscript)\n//\n// Note: These portions can be read in a non-overlapping fashion and\n// allow straightforward parsing of the hierarchy that WebGL encodes\n// in the uniform names.\n\nfunction addUniform( container, uniformObject ) {\n\n\tcontainer.seq.push( uniformObject );\n\tcontainer.map[ uniformObject.id ] = uniformObject;\n\n}\n\nfunction parseUniform( activeInfo, addr, container ) {\n\n\tconst path = activeInfo.name,\n\t\tpathLength = path.length;\n\n\t// reset RegExp object, because of the early exit of a previous run\n\tRePathPart.lastIndex = 0;\n\n\twhile ( true ) {\n\n\t\tconst match = RePathPart.exec( path ),\n\t\t\tmatchEnd = RePathPart.lastIndex;\n\n\t\tlet id = match[ 1 ];\n\t\tconst idIsIndex = match[ 2 ] === ']',\n\t\t\tsubscript = match[ 3 ];\n\n\t\tif ( idIsIndex ) id = id | 0; // convert to integer\n\n\t\tif ( subscript === undefined || subscript === '[' && matchEnd + 2 === pathLength ) {\n\n\t\t\t// bare name or \"pure\" bottom-level array \"[0]\" suffix\n\n\t\t\taddUniform( container, subscript === undefined ?\n\t\t\t\tnew SingleUniform( id, activeInfo, addr ) :\n\t\t\t\tnew PureArrayUniform( id, activeInfo, addr ) );\n\n\t\t\tbreak;\n\n\t\t} else {\n\n\t\t\t// step into inner node / create it in case it doesn't exist\n\n\t\t\tconst map = container.map;\n\t\t\tlet next = map[ id ];\n\n\t\t\tif ( next === undefined ) {\n\n\t\t\t\tnext = new StructuredUniform( id );\n\t\t\t\taddUniform( container, next );\n\n\t\t\t}\n\n\t\t\tcontainer = next;\n\n\t\t}\n\n\t}\n\n}\n\n// Root Container\n\nfunction WebGLUniforms( gl, program ) {\n\n\tthis.seq = [];\n\tthis.map = {};\n\n\tconst n = gl.getProgramParameter( program, 35718 );\n\n\tfor ( let i = 0; i < n; ++ i ) {\n\n\t\tconst info = gl.getActiveUniform( program, i ),\n\t\t\taddr = gl.getUniformLocation( program, info.name );\n\n\t\tparseUniform( info, addr, this );\n\n\t}\n\n}\n\nWebGLUniforms.prototype.setValue = function ( gl, name, value, textures ) {\n\n\tconst u = this.map[ name ];\n\n\tif ( u !== undefined ) u.setValue( gl, value, textures );\n\n};\n\nWebGLUniforms.prototype.setOptional = function ( gl, object, name ) {\n\n\tconst v = object[ name ];\n\n\tif ( v !== undefined ) this.setValue( gl, name, v );\n\n};\n\n\n// Static interface\n\nWebGLUniforms.upload = function ( gl, seq, values, textures ) {\n\n\tfor ( let i = 0, n = seq.length; i !== n; ++ i ) {\n\n\t\tconst u = seq[ i ],\n\t\t\tv = values[ u.id ];\n\n\t\tif ( v.needsUpdate !== false ) {\n\n\t\t\t// note: always updating when .needsUpdate is undefined\n\t\t\tu.setValue( gl, v.value, textures );\n\n\t\t}\n\n\t}\n\n};\n\nWebGLUniforms.seqWithValue = function ( seq, values ) {\n\n\tconst r = [];\n\n\tfor ( let i = 0, n = seq.length; i !== n; ++ i ) {\n\n\t\tconst u = seq[ i ];\n\t\tif ( u.id in values ) r.push( u );\n\n\t}\n\n\treturn r;\n\n};\n\nfunction WebGLShader( gl, type, string ) {\n\n\tconst shader = gl.createShader( type );\n\n\tgl.shaderSource( shader, string );\n\tgl.compileShader( shader );\n\n\treturn shader;\n\n}\n\nlet programIdCount = 0;\n\nfunction addLineNumbers( string ) {\n\n\tconst lines = string.split( '\\n' );\n\n\tfor ( let i = 0; i < lines.length; i ++ ) {\n\n\t\tlines[ i ] = ( i + 1 ) + ': ' + lines[ i ];\n\n\t}\n\n\treturn lines.join( '\\n' );\n\n}\n\nfunction getEncodingComponents( encoding ) {\n\n\tswitch ( encoding ) {\n\n\t\tcase LinearEncoding:\n\t\t\treturn [ 'Linear', '( value )' ];\n\t\tcase sRGBEncoding:\n\t\t\treturn [ 'sRGB', '( value )' ];\n\t\tcase RGBEEncoding:\n\t\t\treturn [ 'RGBE', '( value )' ];\n\t\tcase RGBM7Encoding:\n\t\t\treturn [ 'RGBM', '( value, 7.0 )' ];\n\t\tcase RGBM16Encoding:\n\t\t\treturn [ 'RGBM', '( value, 16.0 )' ];\n\t\tcase RGBDEncoding:\n\t\t\treturn [ 'RGBD', '( value, 256.0 )' ];\n\t\tcase GammaEncoding:\n\t\t\treturn [ 'Gamma', '( value, float( GAMMA_FACTOR ) )' ];\n\t\tcase LogLuvEncoding:\n\t\t\treturn [ 'LogLuv', '( value )' ];\n\t\tdefault:\n\t\t\tconsole.warn( 'THREE.WebGLProgram: Unsupported encoding:', encoding );\n\t\t\treturn [ 'Linear', '( value )' ];\n\n\t}\n\n}\n\nfunction getShaderErrors( gl, shader, type ) {\n\n\tconst status = gl.getShaderParameter( shader, 35713 );\n\tconst log = gl.getShaderInfoLog( shader ).trim();\n\n\tif ( status && log === '' ) return '';\n\n\t// --enable-privileged-webgl-extension\n\t// console.log( '**' + type + '**', gl.getExtension( 'WEBGL_debug_shaders' ).getTranslatedShaderSource( shader ) );\n\n\tconst source = gl.getShaderSource( shader );\n\n\treturn 'THREE.WebGLShader: gl.getShaderInfoLog() ' + type + '\\n' + log + addLineNumbers( source );\n\n}\n\nfunction getTexelDecodingFunction( functionName, encoding ) {\n\n\tconst components = getEncodingComponents( encoding );\n\treturn 'vec4 ' + functionName + '( vec4 value ) { return ' + components[ 0 ] + 'ToLinear' + components[ 1 ] + '; }';\n\n}\n\nfunction getTexelEncodingFunction( functionName, encoding ) {\n\n\tconst components = getEncodingComponents( encoding );\n\treturn 'vec4 ' + functionName + '( vec4 value ) { return LinearTo' + components[ 0 ] + components[ 1 ] + '; }';\n\n}\n\nfunction getToneMappingFunction( functionName, toneMapping ) {\n\n\tlet toneMappingName;\n\n\tswitch ( toneMapping ) {\n\n\t\tcase LinearToneMapping:\n\t\t\ttoneMappingName = 'Linear';\n\t\t\tbreak;\n\n\t\tcase ReinhardToneMapping:\n\t\t\ttoneMappingName = 'Reinhard';\n\t\t\tbreak;\n\n\t\tcase CineonToneMapping:\n\t\t\ttoneMappingName = 'OptimizedCineon';\n\t\t\tbreak;\n\n\t\tcase ACESFilmicToneMapping:\n\t\t\ttoneMappingName = 'ACESFilmic';\n\t\t\tbreak;\n\n\t\tcase CustomToneMapping:\n\t\t\ttoneMappingName = 'Custom';\n\t\t\tbreak;\n\n\t\tdefault:\n\t\t\tconsole.warn( 'THREE.WebGLProgram: Unsupported toneMapping:', toneMapping );\n\t\t\ttoneMappingName = 'Linear';\n\n\t}\n\n\treturn 'vec3 ' + functionName + '( vec3 color ) { return ' + toneMappingName + 'ToneMapping( color ); }';\n\n}\n\nfunction generateExtensions( parameters ) {\n\n\tconst chunks = [\n\t\t( parameters.extensionDerivatives || parameters.envMapCubeUV || parameters.bumpMap || parameters.tangentSpaceNormalMap || parameters.clearcoatNormalMap || parameters.flatShading || parameters.shaderID === 'physical' ) ? '#extension GL_OES_standard_derivatives : enable' : '',\n\t\t( parameters.extensionFragDepth || parameters.logarithmicDepthBuffer ) && parameters.rendererExtensionFragDepth ? '#extension GL_EXT_frag_depth : enable' : '',\n\t\t( parameters.extensionDrawBuffers && parameters.rendererExtensionDrawBuffers ) ? '#extension GL_EXT_draw_buffers : require' : '',\n\t\t( parameters.extensionShaderTextureLOD || parameters.envMap ) && parameters.rendererExtensionShaderTextureLod ? '#extension GL_EXT_shader_texture_lod : enable' : ''\n\t];\n\n\treturn chunks.filter( filterEmptyLine ).join( '\\n' );\n\n}\n\nfunction generateDefines( defines ) {\n\n\tconst chunks = [];\n\n\tfor ( const name in defines ) {\n\n\t\tconst value = defines[ name ];\n\n\t\tif ( value === false ) continue;\n\n\t\tchunks.push( '#define ' + name + ' ' + value );\n\n\t}\n\n\treturn chunks.join( '\\n' );\n\n}\n\nfunction fetchAttributeLocations( gl, program ) {\n\n\tconst attributes = {};\n\n\tconst n = gl.getProgramParameter( program, 35721 );\n\n\tfor ( let i = 0; i < n; i ++ ) {\n\n\t\tconst info = gl.getActiveAttrib( program, i );\n\t\tconst name = info.name;\n\n\t\t// console.log( 'THREE.WebGLProgram: ACTIVE VERTEX ATTRIBUTE:', name, i );\n\n\t\tattributes[ name ] = gl.getAttribLocation( program, name );\n\n\t}\n\n\treturn attributes;\n\n}\n\nfunction filterEmptyLine( string ) {\n\n\treturn string !== '';\n\n}\n\nfunction replaceLightNums( string, parameters ) {\n\n\treturn string\n\t\t.replace( /NUM_DIR_LIGHTS/g, parameters.numDirLights )\n\t\t.replace( /NUM_SPOT_LIGHTS/g, parameters.numSpotLights )\n\t\t.replace( /NUM_RECT_AREA_LIGHTS/g, parameters.numRectAreaLights )\n\t\t.replace( /NUM_POINT_LIGHTS/g, parameters.numPointLights )\n\t\t.replace( /NUM_HEMI_LIGHTS/g, parameters.numHemiLights )\n\t\t.replace( /NUM_DIR_LIGHT_SHADOWS/g, parameters.numDirLightShadows )\n\t\t.replace( /NUM_SPOT_LIGHT_SHADOWS/g, parameters.numSpotLightShadows )\n\t\t.replace( /NUM_POINT_LIGHT_SHADOWS/g, parameters.numPointLightShadows );\n\n}\n\nfunction replaceClippingPlaneNums( string, parameters ) {\n\n\treturn string\n\t\t.replace( /NUM_CLIPPING_PLANES/g, parameters.numClippingPlanes )\n\t\t.replace( /UNION_CLIPPING_PLANES/g, ( parameters.numClippingPlanes - parameters.numClipIntersection ) );\n\n}\n\n// Resolve Includes\n\nconst includePattern = /^[ \\t]*#include +<([\\w\\d./]+)>/gm;\n\nfunction resolveIncludes( string ) {\n\n\treturn string.replace( includePattern, includeReplacer );\n\n}\n\nfunction includeReplacer( match, include ) {\n\n\tconst string = ShaderChunk[ include ];\n\n\tif ( string === undefined ) {\n\n\t\tthrow new Error( 'Can not resolve #include <' + include + '>' );\n\n\t}\n\n\treturn resolveIncludes( string );\n\n}\n\n// Unroll Loops\n\nconst deprecatedUnrollLoopPattern = /#pragma unroll_loop[\\s]+?for \\( int i \\= (\\d+)\\; i < (\\d+)\\; i \\+\\+ \\) \\{([\\s\\S]+?)(?=\\})\\}/g;\nconst unrollLoopPattern = /#pragma unroll_loop_start\\s+for\\s*\\(\\s*int\\s+i\\s*=\\s*(\\d+)\\s*;\\s*i\\s*<\\s*(\\d+)\\s*;\\s*i\\s*\\+\\+\\s*\\)\\s*{([\\s\\S]+?)}\\s+#pragma unroll_loop_end/g;\n\nfunction unrollLoops( string ) {\n\n\treturn string\n\t\t.replace( unrollLoopPattern, loopReplacer )\n\t\t.replace( deprecatedUnrollLoopPattern, deprecatedLoopReplacer );\n\n}\n\nfunction deprecatedLoopReplacer( match, start, end, snippet ) {\n\n\tconsole.warn( 'WebGLProgram: #pragma unroll_loop shader syntax is deprecated. Please use #pragma unroll_loop_start syntax instead.' );\n\treturn loopReplacer( match, start, end, snippet );\n\n}\n\nfunction loopReplacer( match, start, end, snippet ) {\n\n\tlet string = '';\n\n\tfor ( let i = parseInt( start ); i < parseInt( end ); i ++ ) {\n\n\t\tstring += snippet\n\t\t\t.replace( /\\[\\s*i\\s*\\]/g, '[ ' + i + ' ]' )\n\t\t\t.replace( /UNROLLED_LOOP_INDEX/g, i );\n\n\t}\n\n\treturn string;\n\n}\n\n//\n\nfunction generatePrecision( parameters ) {\n\n\tlet precisionstring = 'precision ' + parameters.precision + ' float;\\nprecision ' + parameters.precision + ' int;';\n\n\tif ( parameters.precision === 'highp' ) {\n\n\t\tprecisionstring += '\\n#define HIGH_PRECISION';\n\n\t} else if ( parameters.precision === 'mediump' ) {\n\n\t\tprecisionstring += '\\n#define MEDIUM_PRECISION';\n\n\t} else if ( parameters.precision === 'lowp' ) {\n\n\t\tprecisionstring += '\\n#define LOW_PRECISION';\n\n\t}\n\n\treturn precisionstring;\n\n}\n\nfunction generateShadowMapTypeDefine( parameters ) {\n\n\tlet shadowMapTypeDefine = 'SHADOWMAP_TYPE_BASIC';\n\n\tif ( parameters.shadowMapType === PCFShadowMap ) {\n\n\t\tshadowMapTypeDefine = 'SHADOWMAP_TYPE_PCF';\n\n\t} else if ( parameters.shadowMapType === PCFSoftShadowMap ) {\n\n\t\tshadowMapTypeDefine = 'SHADOWMAP_TYPE_PCF_SOFT';\n\n\t} else if ( parameters.shadowMapType === VSMShadowMap ) {\n\n\t\tshadowMapTypeDefine = 'SHADOWMAP_TYPE_VSM';\n\n\t}\n\n\treturn shadowMapTypeDefine;\n\n}\n\nfunction generateEnvMapTypeDefine( parameters ) {\n\n\tlet envMapTypeDefine = 'ENVMAP_TYPE_CUBE';\n\n\tif ( parameters.envMap ) {\n\n\t\tswitch ( parameters.envMapMode ) {\n\n\t\t\tcase CubeReflectionMapping:\n\t\t\tcase CubeRefractionMapping:\n\t\t\t\tenvMapTypeDefine = 'ENVMAP_TYPE_CUBE';\n\t\t\t\tbreak;\n\n\t\t\tcase CubeUVReflectionMapping:\n\t\t\tcase CubeUVRefractionMapping:\n\t\t\t\tenvMapTypeDefine = 'ENVMAP_TYPE_CUBE_UV';\n\t\t\t\tbreak;\n\n\t\t}\n\n\t}\n\n\treturn envMapTypeDefine;\n\n}\n\nfunction generateEnvMapModeDefine( parameters ) {\n\n\tlet envMapModeDefine = 'ENVMAP_MODE_REFLECTION';\n\n\tif ( parameters.envMap ) {\n\n\t\tswitch ( parameters.envMapMode ) {\n\n\t\t\tcase CubeRefractionMapping:\n\t\t\tcase CubeUVRefractionMapping:\n\n\t\t\t\tenvMapModeDefine = 'ENVMAP_MODE_REFRACTION';\n\t\t\t\tbreak;\n\n\t\t}\n\n\t}\n\n\treturn envMapModeDefine;\n\n}\n\nfunction generateEnvMapBlendingDefine( parameters ) {\n\n\tlet envMapBlendingDefine = 'ENVMAP_BLENDING_NONE';\n\n\tif ( parameters.envMap ) {\n\n\t\tswitch ( parameters.combine ) {\n\n\t\t\tcase MultiplyOperation:\n\t\t\t\tenvMapBlendingDefine = 'ENVMAP_BLENDING_MULTIPLY';\n\t\t\t\tbreak;\n\n\t\t\tcase MixOperation:\n\t\t\t\tenvMapBlendingDefine = 'ENVMAP_BLENDING_MIX';\n\t\t\t\tbreak;\n\n\t\t\tcase AddOperation:\n\t\t\t\tenvMapBlendingDefine = 'ENVMAP_BLENDING_ADD';\n\t\t\t\tbreak;\n\n\t\t}\n\n\t}\n\n\treturn envMapBlendingDefine;\n\n}\n\nfunction WebGLProgram( renderer, cacheKey, parameters, bindingStates ) {\n\n\tconst gl = renderer.getContext();\n\n\tconst defines = parameters.defines;\n\n\tlet vertexShader = parameters.vertexShader;\n\tlet fragmentShader = parameters.fragmentShader;\n\n\tconst shadowMapTypeDefine = generateShadowMapTypeDefine( parameters );\n\tconst envMapTypeDefine = generateEnvMapTypeDefine( parameters );\n\tconst envMapModeDefine = generateEnvMapModeDefine( parameters );\n\tconst envMapBlendingDefine = generateEnvMapBlendingDefine( parameters );\n\n\n\tconst gammaFactorDefine = ( renderer.gammaFactor > 0 ) ? renderer.gammaFactor : 1.0;\n\n\tconst customExtensions = parameters.isWebGL2 ? '' : generateExtensions( parameters );\n\n\tconst customDefines = generateDefines( defines );\n\n\tconst program = gl.createProgram();\n\n\tlet prefixVertex, prefixFragment;\n\tlet versionString = parameters.glslVersion ? '#version ' + parameters.glslVersion + '\\n' : '';\n\n\tif ( parameters.isRawShaderMaterial ) {\n\n\t\tprefixVertex = [\n\n\t\t\tcustomDefines\n\n\t\t].filter( filterEmptyLine ).join( '\\n' );\n\n\t\tif ( prefixVertex.length > 0 ) {\n\n\t\t\tprefixVertex += '\\n';\n\n\t\t}\n\n\t\tprefixFragment = [\n\n\t\t\tcustomExtensions,\n\t\t\tcustomDefines\n\n\t\t].filter( filterEmptyLine ).join( '\\n' );\n\n\t\tif ( prefixFragment.length > 0 ) {\n\n\t\t\tprefixFragment += '\\n';\n\n\t\t}\n\n\t} else {\n\n\t\tprefixVertex = [\n\n\t\t\tgeneratePrecision( parameters ),\n\n\t\t\t'#define SHADER_NAME ' + parameters.shaderName,\n\n\t\t\tcustomDefines,\n\n\t\t\tparameters.instancing ? '#define USE_INSTANCING' : '',\n\t\t\tparameters.instancingColor ? '#define USE_INSTANCING_COLOR' : '',\n\n\t\t\tparameters.supportsVertexTextures ? '#define VERTEX_TEXTURES' : '',\n\n\t\t\t'#define GAMMA_FACTOR ' + gammaFactorDefine,\n\n\t\t\t'#define MAX_BONES ' + parameters.maxBones,\n\t\t\t( parameters.useFog && parameters.fog ) ? '#define USE_FOG' : '',\n\t\t\t( parameters.useFog && parameters.fogExp2 ) ? '#define FOG_EXP2' : '',\n\n\t\t\tparameters.map ? '#define USE_MAP' : '',\n\t\t\tparameters.envMap ? '#define USE_ENVMAP' : '',\n\t\t\tparameters.envMap ? '#define ' + envMapModeDefine : '',\n\t\t\tparameters.lightMap ? '#define USE_LIGHTMAP' : '',\n\t\t\tparameters.aoMap ? '#define USE_AOMAP' : '',\n\t\t\tparameters.emissiveMap ? '#define USE_EMISSIVEMAP' : '',\n\t\t\tparameters.bumpMap ? '#define USE_BUMPMAP' : '',\n\t\t\tparameters.normalMap ? '#define USE_NORMALMAP' : '',\n\t\t\t( parameters.normalMap && parameters.objectSpaceNormalMap ) ? '#define OBJECTSPACE_NORMALMAP' : '',\n\t\t\t( parameters.normalMap && parameters.tangentSpaceNormalMap ) ? '#define TANGENTSPACE_NORMALMAP' : '',\n\n\t\t\tparameters.clearcoatMap ? '#define USE_CLEARCOATMAP' : '',\n\t\t\tparameters.clearcoatRoughnessMap ? '#define USE_CLEARCOAT_ROUGHNESSMAP' : '',\n\t\t\tparameters.clearcoatNormalMap ? '#define USE_CLEARCOAT_NORMALMAP' : '',\n\t\t\tparameters.displacementMap && parameters.supportsVertexTextures ? '#define USE_DISPLACEMENTMAP' : '',\n\t\t\tparameters.specularMap ? '#define USE_SPECULARMAP' : '',\n\t\t\tparameters.roughnessMap ? '#define USE_ROUGHNESSMAP' : '',\n\t\t\tparameters.metalnessMap ? '#define USE_METALNESSMAP' : '',\n\t\t\tparameters.alphaMap ? '#define USE_ALPHAMAP' : '',\n\t\t\tparameters.transmissionMap ? '#define USE_TRANSMISSIONMAP' : '',\n\n\t\t\tparameters.vertexTangents ? '#define USE_TANGENT' : '',\n\t\t\tparameters.vertexColors ? '#define USE_COLOR' : '',\n\t\t\tparameters.vertexUvs ? '#define USE_UV' : '',\n\t\t\tparameters.uvsVertexOnly ? '#define UVS_VERTEX_ONLY' : '',\n\n\t\t\tparameters.flatShading ? '#define FLAT_SHADED' : '',\n\n\t\t\tparameters.skinning ? '#define USE_SKINNING' : '',\n\t\t\tparameters.useVertexTexture ? '#define BONE_TEXTURE' : '',\n\n\t\t\tparameters.morphTargets ? '#define USE_MORPHTARGETS' : '',\n\t\t\tparameters.morphNormals && parameters.flatShading === false ? '#define USE_MORPHNORMALS' : '',\n\t\t\tparameters.doubleSided ? '#define DOUBLE_SIDED' : '',\n\t\t\tparameters.flipSided ? '#define FLIP_SIDED' : '',\n\n\t\t\tparameters.shadowMapEnabled ? '#define USE_SHADOWMAP' : '',\n\t\t\tparameters.shadowMapEnabled ? '#define ' + shadowMapTypeDefine : '',\n\n\t\t\tparameters.sizeAttenuation ? '#define USE_SIZEATTENUATION' : '',\n\n\t\t\tparameters.logarithmicDepthBuffer ? '#define USE_LOGDEPTHBUF' : '',\n\t\t\t( parameters.logarithmicDepthBuffer && parameters.rendererExtensionFragDepth ) ? '#define USE_LOGDEPTHBUF_EXT' : '',\n\n\t\t\t'uniform mat4 modelMatrix;',\n\t\t\t'uniform mat4 modelViewMatrix;',\n\t\t\t'uniform mat4 projectionMatrix;',\n\t\t\t'uniform mat4 viewMatrix;',\n\t\t\t'uniform mat3 normalMatrix;',\n\t\t\t'uniform vec3 cameraPosition;',\n\t\t\t'uniform bool isOrthographic;',\n\n\t\t\t'#ifdef USE_INSTANCING',\n\n\t\t\t'\tattribute mat4 instanceMatrix;',\n\n\t\t\t'#endif',\n\n\t\t\t'#ifdef USE_INSTANCING_COLOR',\n\n\t\t\t'\tattribute vec3 instanceColor;',\n\n\t\t\t'#endif',\n\n\t\t\t'attribute vec3 position;',\n\t\t\t'attribute vec3 normal;',\n\t\t\t'attribute vec2 uv;',\n\n\t\t\t'#ifdef USE_TANGENT',\n\n\t\t\t'\tattribute vec4 tangent;',\n\n\t\t\t'#endif',\n\n\t\t\t'#ifdef USE_COLOR',\n\n\t\t\t'\tattribute vec3 color;',\n\n\t\t\t'#endif',\n\n\t\t\t'#ifdef USE_MORPHTARGETS',\n\n\t\t\t'\tattribute vec3 morphTarget0;',\n\t\t\t'\tattribute vec3 morphTarget1;',\n\t\t\t'\tattribute vec3 morphTarget2;',\n\t\t\t'\tattribute vec3 morphTarget3;',\n\n\t\t\t'\t#ifdef USE_MORPHNORMALS',\n\n\t\t\t'\t\tattribute vec3 morphNormal0;',\n\t\t\t'\t\tattribute vec3 morphNormal1;',\n\t\t\t'\t\tattribute vec3 morphNormal2;',\n\t\t\t'\t\tattribute vec3 morphNormal3;',\n\n\t\t\t'\t#else',\n\n\t\t\t'\t\tattribute vec3 morphTarget4;',\n\t\t\t'\t\tattribute vec3 morphTarget5;',\n\t\t\t'\t\tattribute vec3 morphTarget6;',\n\t\t\t'\t\tattribute vec3 morphTarget7;',\n\n\t\t\t'\t#endif',\n\n\t\t\t'#endif',\n\n\t\t\t'#ifdef USE_SKINNING',\n\n\t\t\t'\tattribute vec4 skinIndex;',\n\t\t\t'\tattribute vec4 skinWeight;',\n\n\t\t\t'#endif',\n\n\t\t\t'\\n'\n\n\t\t].filter( filterEmptyLine ).join( '\\n' );\n\n\t\tprefixFragment = [\n\n\t\t\tcustomExtensions,\n\n\t\t\tgeneratePrecision( parameters ),\n\n\t\t\t'#define SHADER_NAME ' + parameters.shaderName,\n\n\t\t\tcustomDefines,\n\n\t\t\tparameters.alphaTest ? '#define ALPHATEST ' + parameters.alphaTest + ( parameters.alphaTest % 1 ? '' : '.0' ) : '', // add '.0' if integer\n\n\t\t\t'#define GAMMA_FACTOR ' + gammaFactorDefine,\n\n\t\t\t( parameters.useFog && parameters.fog ) ? '#define USE_FOG' : '',\n\t\t\t( parameters.useFog && parameters.fogExp2 ) ? '#define FOG_EXP2' : '',\n\n\t\t\tparameters.map ? '#define USE_MAP' : '',\n\t\t\tparameters.matcap ? '#define USE_MATCAP' : '',\n\t\t\tparameters.envMap ? '#define USE_ENVMAP' : '',\n\t\t\tparameters.envMap ? '#define ' + envMapTypeDefine : '',\n\t\t\tparameters.envMap ? '#define ' + envMapModeDefine : '',\n\t\t\tparameters.envMap ? '#define ' + envMapBlendingDefine : '',\n\t\t\tparameters.lightMap ? '#define USE_LIGHTMAP' : '',\n\t\t\tparameters.aoMap ? '#define USE_AOMAP' : '',\n\t\t\tparameters.emissiveMap ? '#define USE_EMISSIVEMAP' : '',\n\t\t\tparameters.bumpMap ? '#define USE_BUMPMAP' : '',\n\t\t\tparameters.normalMap ? '#define USE_NORMALMAP' : '',\n\t\t\t( parameters.normalMap && parameters.objectSpaceNormalMap ) ? '#define OBJECTSPACE_NORMALMAP' : '',\n\t\t\t( parameters.normalMap && parameters.tangentSpaceNormalMap ) ? '#define TANGENTSPACE_NORMALMAP' : '',\n\t\t\tparameters.clearcoatMap ? '#define USE_CLEARCOATMAP' : '',\n\t\t\tparameters.clearcoatRoughnessMap ? '#define USE_CLEARCOAT_ROUGHNESSMAP' : '',\n\t\t\tparameters.clearcoatNormalMap ? '#define USE_CLEARCOAT_NORMALMAP' : '',\n\t\t\tparameters.specularMap ? '#define USE_SPECULARMAP' : '',\n\t\t\tparameters.roughnessMap ? '#define USE_ROUGHNESSMAP' : '',\n\t\t\tparameters.metalnessMap ? '#define USE_METALNESSMAP' : '',\n\t\t\tparameters.alphaMap ? '#define USE_ALPHAMAP' : '',\n\n\t\t\tparameters.sheen ? '#define USE_SHEEN' : '',\n\t\t\tparameters.transmissionMap ? '#define USE_TRANSMISSIONMAP' : '',\n\n\t\t\tparameters.vertexTangents ? '#define USE_TANGENT' : '',\n\t\t\tparameters.vertexColors || parameters.instancingColor ? '#define USE_COLOR' : '',\n\t\t\tparameters.vertexUvs ? '#define USE_UV' : '',\n\t\t\tparameters.uvsVertexOnly ? '#define UVS_VERTEX_ONLY' : '',\n\n\t\t\tparameters.gradientMap ? '#define USE_GRADIENTMAP' : '',\n\n\t\t\tparameters.flatShading ? '#define FLAT_SHADED' : '',\n\n\t\t\tparameters.doubleSided ? '#define DOUBLE_SIDED' : '',\n\t\t\tparameters.flipSided ? '#define FLIP_SIDED' : '',\n\n\t\t\tparameters.shadowMapEnabled ? '#define USE_SHADOWMAP' : '',\n\t\t\tparameters.shadowMapEnabled ? '#define ' + shadowMapTypeDefine : '',\n\n\t\t\tparameters.premultipliedAlpha ? '#define PREMULTIPLIED_ALPHA' : '',\n\n\t\t\tparameters.physicallyCorrectLights ? '#define PHYSICALLY_CORRECT_LIGHTS' : '',\n\n\t\t\tparameters.logarithmicDepthBuffer ? '#define USE_LOGDEPTHBUF' : '',\n\t\t\t( parameters.logarithmicDepthBuffer && parameters.rendererExtensionFragDepth ) ? '#define USE_LOGDEPTHBUF_EXT' : '',\n\n\t\t\t( ( parameters.extensionShaderTextureLOD || parameters.envMap ) && parameters.rendererExtensionShaderTextureLod ) ? '#define TEXTURE_LOD_EXT' : '',\n\n\t\t\t'uniform mat4 viewMatrix;',\n\t\t\t'uniform vec3 cameraPosition;',\n\t\t\t'uniform bool isOrthographic;',\n\n\t\t\t( parameters.toneMapping !== NoToneMapping ) ? '#define TONE_MAPPING' : '',\n\t\t\t( parameters.toneMapping !== NoToneMapping ) ? ShaderChunk[ 'tonemapping_pars_fragment' ] : '', // this code is required here because it is used by the toneMapping() function defined below\n\t\t\t( parameters.toneMapping !== NoToneMapping ) ? getToneMappingFunction( 'toneMapping', parameters.toneMapping ) : '',\n\n\t\t\tparameters.dithering ? '#define DITHERING' : '',\n\n\t\t\tShaderChunk[ 'encodings_pars_fragment' ], // this code is required here because it is used by the various encoding/decoding function defined below\n\t\t\tparameters.map ? getTexelDecodingFunction( 'mapTexelToLinear', parameters.mapEncoding ) : '',\n\t\t\tparameters.matcap ? getTexelDecodingFunction( 'matcapTexelToLinear', parameters.matcapEncoding ) : '',\n\t\t\tparameters.envMap ? getTexelDecodingFunction( 'envMapTexelToLinear', parameters.envMapEncoding ) : '',\n\t\t\tparameters.emissiveMap ? getTexelDecodingFunction( 'emissiveMapTexelToLinear', parameters.emissiveMapEncoding ) : '',\n\t\t\tparameters.lightMap ? getTexelDecodingFunction( 'lightMapTexelToLinear', parameters.lightMapEncoding ) : '',\n\t\t\tgetTexelEncodingFunction( 'linearToOutputTexel', parameters.outputEncoding ),\n\n\t\t\tparameters.depthPacking ? '#define DEPTH_PACKING ' + parameters.depthPacking : '',\n\n\t\t\t'\\n'\n\n\t\t].filter( filterEmptyLine ).join( '\\n' );\n\n\t}\n\n\tvertexShader = resolveIncludes( vertexShader );\n\tvertexShader = replaceLightNums( vertexShader, parameters );\n\tvertexShader = replaceClippingPlaneNums( vertexShader, parameters );\n\n\tfragmentShader = resolveIncludes( fragmentShader );\n\tfragmentShader = replaceLightNums( fragmentShader, parameters );\n\tfragmentShader = replaceClippingPlaneNums( fragmentShader, parameters );\n\n\tvertexShader = unrollLoops( vertexShader );\n\tfragmentShader = unrollLoops( fragmentShader );\n\n\tif ( parameters.isWebGL2 && parameters.isRawShaderMaterial !== true ) {\n\n\t\t// GLSL 3.0 conversion for built-in materials and ShaderMaterial\n\n\t\tversionString = '#version 300 es\\n';\n\n\t\tprefixVertex = [\n\t\t\t'#define attribute in',\n\t\t\t'#define varying out',\n\t\t\t'#define texture2D texture'\n\t\t].join( '\\n' ) + '\\n' + prefixVertex;\n\n\t\tprefixFragment = [\n\t\t\t'#define varying in',\n\t\t\t( parameters.glslVersion === GLSL3 ) ? '' : 'out highp vec4 pc_fragColor;',\n\t\t\t( parameters.glslVersion === GLSL3 ) ? '' : '#define gl_FragColor pc_fragColor',\n\t\t\t'#define gl_FragDepthEXT gl_FragDepth',\n\t\t\t'#define texture2D texture',\n\t\t\t'#define textureCube texture',\n\t\t\t'#define texture2DProj textureProj',\n\t\t\t'#define texture2DLodEXT textureLod',\n\t\t\t'#define texture2DProjLodEXT textureProjLod',\n\t\t\t'#define textureCubeLodEXT textureLod',\n\t\t\t'#define texture2DGradEXT textureGrad',\n\t\t\t'#define texture2DProjGradEXT textureProjGrad',\n\t\t\t'#define textureCubeGradEXT textureGrad'\n\t\t].join( '\\n' ) + '\\n' + prefixFragment;\n\n\t}\n\n\tconst vertexGlsl = versionString + prefixVertex + vertexShader;\n\tconst fragmentGlsl = versionString + prefixFragment + fragmentShader;\n\n\t// console.log( '*VERTEX*', vertexGlsl );\n\t// console.log( '*FRAGMENT*', fragmentGlsl );\n\n\tconst glVertexShader = WebGLShader( gl, 35633, vertexGlsl );\n\tconst glFragmentShader = WebGLShader( gl, 35632, fragmentGlsl );\n\n\tgl.attachShader( program, glVertexShader );\n\tgl.attachShader( program, glFragmentShader );\n\n\t// Force a particular attribute to index 0.\n\n\tif ( parameters.index0AttributeName !== undefined ) {\n\n\t\tgl.bindAttribLocation( program, 0, parameters.index0AttributeName );\n\n\t} else if ( parameters.morphTargets === true ) {\n\n\t\t// programs with morphTargets displace position out of attribute 0\n\t\tgl.bindAttribLocation( program, 0, 'position' );\n\n\t}\n\n\tgl.linkProgram( program );\n\n\t// check for link errors\n\tif ( renderer.debug.checkShaderErrors ) {\n\n\t\tconst programLog = gl.getProgramInfoLog( program ).trim();\n\t\tconst vertexLog = gl.getShaderInfoLog( glVertexShader ).trim();\n\t\tconst fragmentLog = gl.getShaderInfoLog( glFragmentShader ).trim();\n\n\t\tlet runnable = true;\n\t\tlet haveDiagnostics = true;\n\n\t\tif ( gl.getProgramParameter( program, 35714 ) === false ) {\n\n\t\t\trunnable = false;\n\n\t\t\tconst vertexErrors = getShaderErrors( gl, glVertexShader, 'vertex' );\n\t\t\tconst fragmentErrors = getShaderErrors( gl, glFragmentShader, 'fragment' );\n\n\t\t\tconsole.error( 'THREE.WebGLProgram: shader error: ', gl.getError(), '35715', gl.getProgramParameter( program, 35715 ), 'gl.getProgramInfoLog', programLog, vertexErrors, fragmentErrors );\n\n\t\t} else if ( programLog !== '' ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLProgram: gl.getProgramInfoLog()', programLog );\n\n\t\t} else if ( vertexLog === '' || fragmentLog === '' ) {\n\n\t\t\thaveDiagnostics = false;\n\n\t\t}\n\n\t\tif ( haveDiagnostics ) {\n\n\t\t\tthis.diagnostics = {\n\n\t\t\t\trunnable: runnable,\n\n\t\t\t\tprogramLog: programLog,\n\n\t\t\t\tvertexShader: {\n\n\t\t\t\t\tlog: vertexLog,\n\t\t\t\t\tprefix: prefixVertex\n\n\t\t\t\t},\n\n\t\t\t\tfragmentShader: {\n\n\t\t\t\t\tlog: fragmentLog,\n\t\t\t\t\tprefix: prefixFragment\n\n\t\t\t\t}\n\n\t\t\t};\n\n\t\t}\n\n\t}\n\n\t// Clean up\n\n\t// Crashes in iOS9 and iOS10. #18402\n\t// gl.detachShader( program, glVertexShader );\n\t// gl.detachShader( program, glFragmentShader );\n\n\tgl.deleteShader( glVertexShader );\n\tgl.deleteShader( glFragmentShader );\n\n\t// set up caching for uniform locations\n\n\tlet cachedUniforms;\n\n\tthis.getUniforms = function () {\n\n\t\tif ( cachedUniforms === undefined ) {\n\n\t\t\tcachedUniforms = new WebGLUniforms( gl, program );\n\n\t\t}\n\n\t\treturn cachedUniforms;\n\n\t};\n\n\t// set up caching for attribute locations\n\n\tlet cachedAttributes;\n\n\tthis.getAttributes = function () {\n\n\t\tif ( cachedAttributes === undefined ) {\n\n\t\t\tcachedAttributes = fetchAttributeLocations( gl, program );\n\n\t\t}\n\n\t\treturn cachedAttributes;\n\n\t};\n\n\t// free resource\n\n\tthis.destroy = function () {\n\n\t\tbindingStates.releaseStatesOfProgram( this );\n\n\t\tgl.deleteProgram( program );\n\t\tthis.program = undefined;\n\n\t};\n\n\t//\n\n\tthis.name = parameters.shaderName;\n\tthis.id = programIdCount ++;\n\tthis.cacheKey = cacheKey;\n\tthis.usedTimes = 1;\n\tthis.program = program;\n\tthis.vertexShader = glVertexShader;\n\tthis.fragmentShader = glFragmentShader;\n\n\treturn this;\n\n}\n\nfunction WebGLPrograms( renderer, cubemaps, extensions, capabilities, bindingStates, clipping ) {\n\n\tconst programs = [];\n\n\tconst isWebGL2 = capabilities.isWebGL2;\n\tconst logarithmicDepthBuffer = capabilities.logarithmicDepthBuffer;\n\tconst floatVertexTextures = capabilities.floatVertexTextures;\n\tconst maxVertexUniforms = capabilities.maxVertexUniforms;\n\tconst vertexTextures = capabilities.vertexTextures;\n\n\tlet precision = capabilities.precision;\n\n\tconst shaderIDs = {\n\t\tMeshDepthMaterial: 'depth',\n\t\tMeshDistanceMaterial: 'distanceRGBA',\n\t\tMeshNormalMaterial: 'normal',\n\t\tMeshBasicMaterial: 'basic',\n\t\tMeshLambertMaterial: 'lambert',\n\t\tMeshPhongMaterial: 'phong',\n\t\tMeshToonMaterial: 'toon',\n\t\tMeshStandardMaterial: 'physical',\n\t\tMeshPhysicalMaterial: 'physical',\n\t\tMeshMatcapMaterial: 'matcap',\n\t\tLineBasicMaterial: 'basic',\n\t\tLineDashedMaterial: 'dashed',\n\t\tPointsMaterial: 'points',\n\t\tShadowMaterial: 'shadow',\n\t\tSpriteMaterial: 'sprite'\n\t};\n\n\tconst parameterNames = [\n\t\t'precision', 'isWebGL2', 'supportsVertexTextures', 'outputEncoding', 'instancing', 'instancingColor',\n\t\t'map', 'mapEncoding', 'matcap', 'matcapEncoding', 'envMap', 'envMapMode', 'envMapEncoding', 'envMapCubeUV',\n\t\t'lightMap', 'lightMapEncoding', 'aoMap', 'emissiveMap', 'emissiveMapEncoding', 'bumpMap', 'normalMap', 'objectSpaceNormalMap', 'tangentSpaceNormalMap', 'clearcoatMap', 'clearcoatRoughnessMap', 'clearcoatNormalMap', 'displacementMap', 'specularMap',\n\t\t'roughnessMap', 'metalnessMap', 'gradientMap',\n\t\t'alphaMap', 'combine', 'vertexColors', 'vertexTangents', 'vertexUvs', 'uvsVertexOnly', 'fog', 'useFog', 'fogExp2',\n\t\t'flatShading', 'sizeAttenuation', 'logarithmicDepthBuffer', 'skinning',\n\t\t'maxBones', 'useVertexTexture', 'morphTargets', 'morphNormals',\n\t\t'maxMorphTargets', 'maxMorphNormals', 'premultipliedAlpha',\n\t\t'numDirLights', 'numPointLights', 'numSpotLights', 'numHemiLights', 'numRectAreaLights',\n\t\t'numDirLightShadows', 'numPointLightShadows', 'numSpotLightShadows',\n\t\t'shadowMapEnabled', 'shadowMapType', 'toneMapping', 'physicallyCorrectLights',\n\t\t'alphaTest', 'doubleSided', 'flipSided', 'numClippingPlanes', 'numClipIntersection', 'depthPacking', 'dithering',\n\t\t'sheen', 'transmissionMap'\n\t];\n\n\tfunction getMaxBones( object ) {\n\n\t\tconst skeleton = object.skeleton;\n\t\tconst bones = skeleton.bones;\n\n\t\tif ( floatVertexTextures ) {\n\n\t\t\treturn 1024;\n\n\t\t} else {\n\n\t\t\t// default for when object is not specified\n\t\t\t// ( for example when prebuilding shader to be used with multiple objects )\n\t\t\t//\n\t\t\t//  - leave some extra space for other uniforms\n\t\t\t//  - limit here is ANGLE's 254 max uniform vectors\n\t\t\t//    (up to 54 should be safe)\n\n\t\t\tconst nVertexUniforms = maxVertexUniforms;\n\t\t\tconst nVertexMatrices = Math.floor( ( nVertexUniforms - 20 ) / 4 );\n\n\t\t\tconst maxBones = Math.min( nVertexMatrices, bones.length );\n\n\t\t\tif ( maxBones < bones.length ) {\n\n\t\t\t\tconsole.warn( 'THREE.WebGLRenderer: Skeleton has ' + bones.length + ' bones. This GPU supports ' + maxBones + '.' );\n\t\t\t\treturn 0;\n\n\t\t\t}\n\n\t\t\treturn maxBones;\n\n\t\t}\n\n\t}\n\n\tfunction getTextureEncodingFromMap( map ) {\n\n\t\tlet encoding;\n\n\t\tif ( map && map.isTexture ) {\n\n\t\t\tencoding = map.encoding;\n\n\t\t} else if ( map && map.isWebGLRenderTarget ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLPrograms.getTextureEncodingFromMap: don\\'t use render targets as textures. Use their .texture property instead.' );\n\t\t\tencoding = map.texture.encoding;\n\n\t\t} else {\n\n\t\t\tencoding = LinearEncoding;\n\n\t\t}\n\n\t\treturn encoding;\n\n\t}\n\n\tfunction getParameters( material, lights, shadows, scene, object ) {\n\n\t\tconst fog = scene.fog;\n\t\tconst environment = material.isMeshStandardMaterial ? scene.environment : null;\n\n\t\tconst envMap = cubemaps.get( material.envMap || environment );\n\n\t\tconst shaderID = shaderIDs[ material.type ];\n\n\t\t// heuristics to create shader parameters according to lights in the scene\n\t\t// (not to blow over maxLights budget)\n\n\t\tconst maxBones = object.isSkinnedMesh ? getMaxBones( object ) : 0;\n\n\t\tif ( material.precision !== null ) {\n\n\t\t\tprecision = capabilities.getMaxPrecision( material.precision );\n\n\t\t\tif ( precision !== material.precision ) {\n\n\t\t\t\tconsole.warn( 'THREE.WebGLProgram.getParameters:', material.precision, 'not supported, using', precision, 'instead.' );\n\n\t\t\t}\n\n\t\t}\n\n\t\tlet vertexShader, fragmentShader;\n\n\t\tif ( shaderID ) {\n\n\t\t\tconst shader = ShaderLib[ shaderID ];\n\n\t\t\tvertexShader = shader.vertexShader;\n\t\t\tfragmentShader = shader.fragmentShader;\n\n\t\t} else {\n\n\t\t\tvertexShader = material.vertexShader;\n\t\t\tfragmentShader = material.fragmentShader;\n\n\t\t}\n\n\t\tconst currentRenderTarget = renderer.getRenderTarget();\n\n\t\tconst parameters = {\n\n\t\t\tisWebGL2: isWebGL2,\n\n\t\t\tshaderID: shaderID,\n\t\t\tshaderName: material.type,\n\n\t\t\tvertexShader: vertexShader,\n\t\t\tfragmentShader: fragmentShader,\n\t\t\tdefines: material.defines,\n\n\t\t\tisRawShaderMaterial: material.isRawShaderMaterial === true,\n\t\t\tglslVersion: material.glslVersion,\n\n\t\t\tprecision: precision,\n\n\t\t\tinstancing: object.isInstancedMesh === true,\n\t\t\tinstancingColor: object.isInstancedMesh === true && object.instanceColor !== null,\n\n\t\t\tsupportsVertexTextures: vertexTextures,\n\t\t\toutputEncoding: ( currentRenderTarget !== null ) ? getTextureEncodingFromMap( currentRenderTarget.texture ) : renderer.outputEncoding,\n\t\t\tmap: !! material.map,\n\t\t\tmapEncoding: getTextureEncodingFromMap( material.map ),\n\t\t\tmatcap: !! material.matcap,\n\t\t\tmatcapEncoding: getTextureEncodingFromMap( material.matcap ),\n\t\t\tenvMap: !! envMap,\n\t\t\tenvMapMode: envMap && envMap.mapping,\n\t\t\tenvMapEncoding: getTextureEncodingFromMap( envMap ),\n\t\t\tenvMapCubeUV: ( !! envMap ) && ( ( envMap.mapping === CubeUVReflectionMapping ) || ( envMap.mapping === CubeUVRefractionMapping ) ),\n\t\t\tlightMap: !! material.lightMap,\n\t\t\tlightMapEncoding: getTextureEncodingFromMap( material.lightMap ),\n\t\t\taoMap: !! material.aoMap,\n\t\t\temissiveMap: !! material.emissiveMap,\n\t\t\temissiveMapEncoding: getTextureEncodingFromMap( material.emissiveMap ),\n\t\t\tbumpMap: !! material.bumpMap,\n\t\t\tnormalMap: !! material.normalMap,\n\t\t\tobjectSpaceNormalMap: material.normalMapType === ObjectSpaceNormalMap,\n\t\t\ttangentSpaceNormalMap: material.normalMapType === TangentSpaceNormalMap,\n\t\t\tclearcoatMap: !! material.clearcoatMap,\n\t\t\tclearcoatRoughnessMap: !! material.clearcoatRoughnessMap,\n\t\t\tclearcoatNormalMap: !! material.clearcoatNormalMap,\n\t\t\tdisplacementMap: !! material.displacementMap,\n\t\t\troughnessMap: !! material.roughnessMap,\n\t\t\tmetalnessMap: !! material.metalnessMap,\n\t\t\tspecularMap: !! material.specularMap,\n\t\t\talphaMap: !! material.alphaMap,\n\n\t\t\tgradientMap: !! material.gradientMap,\n\n\t\t\tsheen: !! material.sheen,\n\n\t\t\ttransmissionMap: !! material.transmissionMap,\n\n\t\t\tcombine: material.combine,\n\n\t\t\tvertexTangents: ( material.normalMap && material.vertexTangents ),\n\t\t\tvertexColors: material.vertexColors,\n\t\t\tvertexUvs: !! material.map || !! material.bumpMap || !! material.normalMap || !! material.specularMap || !! material.alphaMap || !! material.emissiveMap || !! material.roughnessMap || !! material.metalnessMap || !! material.clearcoatMap || !! material.clearcoatRoughnessMap || !! material.clearcoatNormalMap || !! material.displacementMap || !! material.transmissionMap,\n\t\t\tuvsVertexOnly: ! ( !! material.map || !! material.bumpMap || !! material.normalMap || !! material.specularMap || !! material.alphaMap || !! material.emissiveMap || !! material.roughnessMap || !! material.metalnessMap || !! material.clearcoatNormalMap || !! material.transmissionMap ) && !! material.displacementMap,\n\n\t\t\tfog: !! fog,\n\t\t\tuseFog: material.fog,\n\t\t\tfogExp2: ( fog && fog.isFogExp2 ),\n\n\t\t\tflatShading: material.flatShading,\n\n\t\t\tsizeAttenuation: material.sizeAttenuation,\n\t\t\tlogarithmicDepthBuffer: logarithmicDepthBuffer,\n\n\t\t\tskinning: material.skinning && maxBones > 0,\n\t\t\tmaxBones: maxBones,\n\t\t\tuseVertexTexture: floatVertexTextures,\n\n\t\t\tmorphTargets: material.morphTargets,\n\t\t\tmorphNormals: material.morphNormals,\n\t\t\tmaxMorphTargets: renderer.maxMorphTargets,\n\t\t\tmaxMorphNormals: renderer.maxMorphNormals,\n\n\t\t\tnumDirLights: lights.directional.length,\n\t\t\tnumPointLights: lights.point.length,\n\t\t\tnumSpotLights: lights.spot.length,\n\t\t\tnumRectAreaLights: lights.rectArea.length,\n\t\t\tnumHemiLights: lights.hemi.length,\n\n\t\t\tnumDirLightShadows: lights.directionalShadowMap.length,\n\t\t\tnumPointLightShadows: lights.pointShadowMap.length,\n\t\t\tnumSpotLightShadows: lights.spotShadowMap.length,\n\n\t\t\tnumClippingPlanes: clipping.numPlanes,\n\t\t\tnumClipIntersection: clipping.numIntersection,\n\n\t\t\tdithering: material.dithering,\n\n\t\t\tshadowMapEnabled: renderer.shadowMap.enabled && shadows.length > 0,\n\t\t\tshadowMapType: renderer.shadowMap.type,\n\n\t\t\ttoneMapping: material.toneMapped ? renderer.toneMapping : NoToneMapping,\n\t\t\tphysicallyCorrectLights: renderer.physicallyCorrectLights,\n\n\t\t\tpremultipliedAlpha: material.premultipliedAlpha,\n\n\t\t\talphaTest: material.alphaTest,\n\t\t\tdoubleSided: material.side === DoubleSide,\n\t\t\tflipSided: material.side === BackSide,\n\n\t\t\tdepthPacking: ( material.depthPacking !== undefined ) ? material.depthPacking : false,\n\n\t\t\tindex0AttributeName: material.index0AttributeName,\n\n\t\t\textensionDerivatives: material.extensions && material.extensions.derivatives,\n\t\t\textensionFragDepth: material.extensions && material.extensions.fragDepth,\n\t\t\textensionDrawBuffers: material.extensions && material.extensions.drawBuffers,\n\t\t\textensionShaderTextureLOD: material.extensions && material.extensions.shaderTextureLOD,\n\n\t\t\trendererExtensionFragDepth: isWebGL2 || extensions.has( 'EXT_frag_depth' ),\n\t\t\trendererExtensionDrawBuffers: isWebGL2 || extensions.has( 'WEBGL_draw_buffers' ),\n\t\t\trendererExtensionShaderTextureLod: isWebGL2 || extensions.has( 'EXT_shader_texture_lod' ),\n\n\t\t\tcustomProgramCacheKey: material.customProgramCacheKey()\n\n\t\t};\n\n\t\treturn parameters;\n\n\t}\n\n\tfunction getProgramCacheKey( parameters ) {\n\n\t\tconst array = [];\n\n\t\tif ( parameters.shaderID ) {\n\n\t\t\tarray.push( parameters.shaderID );\n\n\t\t} else {\n\n\t\t\tarray.push( parameters.fragmentShader );\n\t\t\tarray.push( parameters.vertexShader );\n\n\t\t}\n\n\t\tif ( parameters.defines !== undefined ) {\n\n\t\t\tfor ( const name in parameters.defines ) {\n\n\t\t\t\tarray.push( name );\n\t\t\t\tarray.push( parameters.defines[ name ] );\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( parameters.isRawShaderMaterial === false ) {\n\n\t\t\tfor ( let i = 0; i < parameterNames.length; i ++ ) {\n\n\t\t\t\tarray.push( parameters[ parameterNames[ i ] ] );\n\n\t\t\t}\n\n\t\t\tarray.push( renderer.outputEncoding );\n\t\t\tarray.push( renderer.gammaFactor );\n\n\t\t}\n\n\t\tarray.push( parameters.customProgramCacheKey );\n\n\t\treturn array.join();\n\n\t}\n\n\tfunction getUniforms( material ) {\n\n\t\tconst shaderID = shaderIDs[ material.type ];\n\t\tlet uniforms;\n\n\t\tif ( shaderID ) {\n\n\t\t\tconst shader = ShaderLib[ shaderID ];\n\t\t\tuniforms = UniformsUtils.clone( shader.uniforms );\n\n\t\t} else {\n\n\t\t\tuniforms = material.uniforms;\n\n\t\t}\n\n\t\treturn uniforms;\n\n\t}\n\n\tfunction acquireProgram( parameters, cacheKey ) {\n\n\t\tlet program;\n\n\t\t// Check if code has been already compiled\n\t\tfor ( let p = 0, pl = programs.length; p < pl; p ++ ) {\n\n\t\t\tconst preexistingProgram = programs[ p ];\n\n\t\t\tif ( preexistingProgram.cacheKey === cacheKey ) {\n\n\t\t\t\tprogram = preexistingProgram;\n\t\t\t\t++ program.usedTimes;\n\n\t\t\t\tbreak;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( program === undefined ) {\n\n\t\t\tprogram = new WebGLProgram( renderer, cacheKey, parameters, bindingStates );\n\t\t\tprograms.push( program );\n\n\t\t}\n\n\t\treturn program;\n\n\t}\n\n\tfunction releaseProgram( program ) {\n\n\t\tif ( -- program.usedTimes === 0 ) {\n\n\t\t\t// Remove from unordered set\n\t\t\tconst i = programs.indexOf( program );\n\t\t\tprograms[ i ] = programs[ programs.length - 1 ];\n\t\t\tprograms.pop();\n\n\t\t\t// Free WebGL resources\n\t\t\tprogram.destroy();\n\n\t\t}\n\n\t}\n\n\treturn {\n\t\tgetParameters: getParameters,\n\t\tgetProgramCacheKey: getProgramCacheKey,\n\t\tgetUniforms: getUniforms,\n\t\tacquireProgram: acquireProgram,\n\t\treleaseProgram: releaseProgram,\n\t\t// Exposed for resource monitoring & error feedback via renderer.info:\n\t\tprograms: programs\n\t};\n\n}\n\nfunction WebGLProperties() {\n\n\tlet properties = new WeakMap();\n\n\tfunction get( object ) {\n\n\t\tlet map = properties.get( object );\n\n\t\tif ( map === undefined ) {\n\n\t\t\tmap = {};\n\t\t\tproperties.set( object, map );\n\n\t\t}\n\n\t\treturn map;\n\n\t}\n\n\tfunction remove( object ) {\n\n\t\tproperties.delete( object );\n\n\t}\n\n\tfunction update( object, key, value ) {\n\n\t\tproperties.get( object )[ key ] = value;\n\n\t}\n\n\tfunction dispose() {\n\n\t\tproperties = new WeakMap();\n\n\t}\n\n\treturn {\n\t\tget: get,\n\t\tremove: remove,\n\t\tupdate: update,\n\t\tdispose: dispose\n\t};\n\n}\n\nfunction painterSortStable( a, b ) {\n\n\tif ( a.groupOrder !== b.groupOrder ) {\n\n\t\treturn a.groupOrder - b.groupOrder;\n\n\t} else if ( a.renderOrder !== b.renderOrder ) {\n\n\t\treturn a.renderOrder - b.renderOrder;\n\n\t} else if ( a.program !== b.program ) {\n\n\t\treturn a.program.id - b.program.id;\n\n\t} else if ( a.material.id !== b.material.id ) {\n\n\t\treturn a.material.id - b.material.id;\n\n\t} else if ( a.z !== b.z ) {\n\n\t\treturn a.z - b.z;\n\n\t} else {\n\n\t\treturn a.id - b.id;\n\n\t}\n\n}\n\nfunction reversePainterSortStable( a, b ) {\n\n\tif ( a.groupOrder !== b.groupOrder ) {\n\n\t\treturn a.groupOrder - b.groupOrder;\n\n\t} else if ( a.renderOrder !== b.renderOrder ) {\n\n\t\treturn a.renderOrder - b.renderOrder;\n\n\t} else if ( a.z !== b.z ) {\n\n\t\treturn b.z - a.z;\n\n\t} else {\n\n\t\treturn a.id - b.id;\n\n\t}\n\n}\n\n\nfunction WebGLRenderList( properties ) {\n\n\tconst renderItems = [];\n\tlet renderItemsIndex = 0;\n\n\tconst opaque = [];\n\tconst transparent = [];\n\n\tconst defaultProgram = { id: - 1 };\n\n\tfunction init() {\n\n\t\trenderItemsIndex = 0;\n\n\t\topaque.length = 0;\n\t\ttransparent.length = 0;\n\n\t}\n\n\tfunction getNextRenderItem( object, geometry, material, groupOrder, z, group ) {\n\n\t\tlet renderItem = renderItems[ renderItemsIndex ];\n\t\tconst materialProperties = properties.get( material );\n\n\t\tif ( renderItem === undefined ) {\n\n\t\t\trenderItem = {\n\t\t\t\tid: object.id,\n\t\t\t\tobject: object,\n\t\t\t\tgeometry: geometry,\n\t\t\t\tmaterial: material,\n\t\t\t\tprogram: materialProperties.program || defaultProgram,\n\t\t\t\tgroupOrder: groupOrder,\n\t\t\t\trenderOrder: object.renderOrder,\n\t\t\t\tz: z,\n\t\t\t\tgroup: group\n\t\t\t};\n\n\t\t\trenderItems[ renderItemsIndex ] = renderItem;\n\n\t\t} else {\n\n\t\t\trenderItem.id = object.id;\n\t\t\trenderItem.object = object;\n\t\t\trenderItem.geometry = geometry;\n\t\t\trenderItem.material = material;\n\t\t\trenderItem.program = materialProperties.program || defaultProgram;\n\t\t\trenderItem.groupOrder = groupOrder;\n\t\t\trenderItem.renderOrder = object.renderOrder;\n\t\t\trenderItem.z = z;\n\t\t\trenderItem.group = group;\n\n\t\t}\n\n\t\trenderItemsIndex ++;\n\n\t\treturn renderItem;\n\n\t}\n\n\tfunction push( object, geometry, material, groupOrder, z, group ) {\n\n\t\tconst renderItem = getNextRenderItem( object, geometry, material, groupOrder, z, group );\n\n\t\t( material.transparent === true ? transparent : opaque ).push( renderItem );\n\n\t}\n\n\tfunction unshift( object, geometry, material, groupOrder, z, group ) {\n\n\t\tconst renderItem = getNextRenderItem( object, geometry, material, groupOrder, z, group );\n\n\t\t( material.transparent === true ? transparent : opaque ).unshift( renderItem );\n\n\t}\n\n\tfunction sort( customOpaqueSort, customTransparentSort ) {\n\n\t\tif ( opaque.length > 1 ) opaque.sort( customOpaqueSort || painterSortStable );\n\t\tif ( transparent.length > 1 ) transparent.sort( customTransparentSort || reversePainterSortStable );\n\n\t}\n\n\tfunction finish() {\n\n\t\t// Clear references from inactive renderItems in the list\n\n\t\tfor ( let i = renderItemsIndex, il = renderItems.length; i < il; i ++ ) {\n\n\t\t\tconst renderItem = renderItems[ i ];\n\n\t\t\tif ( renderItem.id === null ) break;\n\n\t\t\trenderItem.id = null;\n\t\t\trenderItem.object = null;\n\t\t\trenderItem.geometry = null;\n\t\t\trenderItem.material = null;\n\t\t\trenderItem.program = null;\n\t\t\trenderItem.group = null;\n\n\t\t}\n\n\t}\n\n\treturn {\n\n\t\topaque: opaque,\n\t\ttransparent: transparent,\n\n\t\tinit: init,\n\t\tpush: push,\n\t\tunshift: unshift,\n\t\tfinish: finish,\n\n\t\tsort: sort\n\t};\n\n}\n\nfunction WebGLRenderLists( properties ) {\n\n\tlet lists = new WeakMap();\n\n\tfunction get( scene, camera ) {\n\n\t\tconst cameras = lists.get( scene );\n\t\tlet list;\n\n\t\tif ( cameras === undefined ) {\n\n\t\t\tlist = new WebGLRenderList( properties );\n\t\t\tlists.set( scene, new WeakMap() );\n\t\t\tlists.get( scene ).set( camera, list );\n\n\t\t} else {\n\n\t\t\tlist = cameras.get( camera );\n\t\t\tif ( list === undefined ) {\n\n\t\t\t\tlist = new WebGLRenderList( properties );\n\t\t\t\tcameras.set( camera, list );\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn list;\n\n\t}\n\n\tfunction dispose() {\n\n\t\tlists = new WeakMap();\n\n\t}\n\n\treturn {\n\t\tget: get,\n\t\tdispose: dispose\n\t};\n\n}\n\nfunction UniformsCache() {\n\n\tconst lights = {};\n\n\treturn {\n\n\t\tget: function ( light ) {\n\n\t\t\tif ( lights[ light.id ] !== undefined ) {\n\n\t\t\t\treturn lights[ light.id ];\n\n\t\t\t}\n\n\t\t\tlet uniforms;\n\n\t\t\tswitch ( light.type ) {\n\n\t\t\t\tcase 'DirectionalLight':\n\t\t\t\t\tuniforms = {\n\t\t\t\t\t\tdirection: new Vector3(),\n\t\t\t\t\t\tcolor: new Color()\n\t\t\t\t\t};\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase 'SpotLight':\n\t\t\t\t\tuniforms = {\n\t\t\t\t\t\tposition: new Vector3(),\n\t\t\t\t\t\tdirection: new Vector3(),\n\t\t\t\t\t\tcolor: new Color(),\n\t\t\t\t\t\tdistance: 0,\n\t\t\t\t\t\tconeCos: 0,\n\t\t\t\t\t\tpenumbraCos: 0,\n\t\t\t\t\t\tdecay: 0\n\t\t\t\t\t};\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase 'PointLight':\n\t\t\t\t\tuniforms = {\n\t\t\t\t\t\tposition: new Vector3(),\n\t\t\t\t\t\tcolor: new Color(),\n\t\t\t\t\t\tdistance: 0,\n\t\t\t\t\t\tdecay: 0\n\t\t\t\t\t};\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase 'HemisphereLight':\n\t\t\t\t\tuniforms = {\n\t\t\t\t\t\tdirection: new Vector3(),\n\t\t\t\t\t\tskyColor: new Color(),\n\t\t\t\t\t\tgroundColor: new Color()\n\t\t\t\t\t};\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase 'RectAreaLight':\n\t\t\t\t\tuniforms = {\n\t\t\t\t\t\tcolor: new Color(),\n\t\t\t\t\t\tposition: new Vector3(),\n\t\t\t\t\t\thalfWidth: new Vector3(),\n\t\t\t\t\t\thalfHeight: new Vector3()\n\t\t\t\t\t};\n\t\t\t\t\tbreak;\n\n\t\t\t}\n\n\t\t\tlights[ light.id ] = uniforms;\n\n\t\t\treturn uniforms;\n\n\t\t}\n\n\t};\n\n}\n\nfunction ShadowUniformsCache() {\n\n\tconst lights = {};\n\n\treturn {\n\n\t\tget: function ( light ) {\n\n\t\t\tif ( lights[ light.id ] !== undefined ) {\n\n\t\t\t\treturn lights[ light.id ];\n\n\t\t\t}\n\n\t\t\tlet uniforms;\n\n\t\t\tswitch ( light.type ) {\n\n\t\t\t\tcase 'DirectionalLight':\n\t\t\t\t\tuniforms = {\n\t\t\t\t\t\tshadowBias: 0,\n\t\t\t\t\t\tshadowNormalBias: 0,\n\t\t\t\t\t\tshadowRadius: 1,\n\t\t\t\t\t\tshadowMapSize: new Vector2()\n\t\t\t\t\t};\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase 'SpotLight':\n\t\t\t\t\tuniforms = {\n\t\t\t\t\t\tshadowBias: 0,\n\t\t\t\t\t\tshadowNormalBias: 0,\n\t\t\t\t\t\tshadowRadius: 1,\n\t\t\t\t\t\tshadowMapSize: new Vector2()\n\t\t\t\t\t};\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase 'PointLight':\n\t\t\t\t\tuniforms = {\n\t\t\t\t\t\tshadowBias: 0,\n\t\t\t\t\t\tshadowNormalBias: 0,\n\t\t\t\t\t\tshadowRadius: 1,\n\t\t\t\t\t\tshadowMapSize: new Vector2(),\n\t\t\t\t\t\tshadowCameraNear: 1,\n\t\t\t\t\t\tshadowCameraFar: 1000\n\t\t\t\t\t};\n\t\t\t\t\tbreak;\n\n\t\t\t\t// TODO (abelnation): set RectAreaLight shadow uniforms\n\n\t\t\t}\n\n\t\t\tlights[ light.id ] = uniforms;\n\n\t\t\treturn uniforms;\n\n\t\t}\n\n\t};\n\n}\n\n\n\nlet nextVersion = 0;\n\nfunction shadowCastingLightsFirst( lightA, lightB ) {\n\n\treturn ( lightB.castShadow ? 1 : 0 ) - ( lightA.castShadow ? 1 : 0 );\n\n}\n\nfunction WebGLLights( extensions, capabilities ) {\n\n\tconst cache = new UniformsCache();\n\n\tconst shadowCache = ShadowUniformsCache();\n\n\tconst state = {\n\n\t\tversion: 0,\n\n\t\thash: {\n\t\t\tdirectionalLength: - 1,\n\t\t\tpointLength: - 1,\n\t\t\tspotLength: - 1,\n\t\t\trectAreaLength: - 1,\n\t\t\themiLength: - 1,\n\n\t\t\tnumDirectionalShadows: - 1,\n\t\t\tnumPointShadows: - 1,\n\t\t\tnumSpotShadows: - 1\n\t\t},\n\n\t\tambient: [ 0, 0, 0 ],\n\t\tprobe: [],\n\t\tdirectional: [],\n\t\tdirectionalShadow: [],\n\t\tdirectionalShadowMap: [],\n\t\tdirectionalShadowMatrix: [],\n\t\tspot: [],\n\t\tspotShadow: [],\n\t\tspotShadowMap: [],\n\t\tspotShadowMatrix: [],\n\t\trectArea: [],\n\t\trectAreaLTC1: null,\n\t\trectAreaLTC2: null,\n\t\tpoint: [],\n\t\tpointShadow: [],\n\t\tpointShadowMap: [],\n\t\tpointShadowMatrix: [],\n\t\themi: []\n\n\t};\n\n\tfor ( let i = 0; i < 9; i ++ ) state.probe.push( new Vector3() );\n\n\tconst vector3 = new Vector3();\n\tconst matrix4 = new Matrix4();\n\tconst matrix42 = new Matrix4();\n\n\tfunction setup( lights ) {\n\n\t\tlet r = 0, g = 0, b = 0;\n\n\t\tfor ( let i = 0; i < 9; i ++ ) state.probe[ i ].set( 0, 0, 0 );\n\n\t\tlet directionalLength = 0;\n\t\tlet pointLength = 0;\n\t\tlet spotLength = 0;\n\t\tlet rectAreaLength = 0;\n\t\tlet hemiLength = 0;\n\n\t\tlet numDirectionalShadows = 0;\n\t\tlet numPointShadows = 0;\n\t\tlet numSpotShadows = 0;\n\n\t\tlights.sort( shadowCastingLightsFirst );\n\n\t\tfor ( let i = 0, l = lights.length; i < l; i ++ ) {\n\n\t\t\tconst light = lights[ i ];\n\n\t\t\tconst color = light.color;\n\t\t\tconst intensity = light.intensity;\n\t\t\tconst distance = light.distance;\n\n\t\t\tconst shadowMap = ( light.shadow && light.shadow.map ) ? light.shadow.map.texture : null;\n\n\t\t\tif ( light.isAmbientLight ) {\n\n\t\t\t\tr += color.r * intensity;\n\t\t\t\tg += color.g * intensity;\n\t\t\t\tb += color.b * intensity;\n\n\t\t\t} else if ( light.isLightProbe ) {\n\n\t\t\t\tfor ( let j = 0; j < 9; j ++ ) {\n\n\t\t\t\t\tstate.probe[ j ].addScaledVector( light.sh.coefficients[ j ], intensity );\n\n\t\t\t\t}\n\n\t\t\t} else if ( light.isDirectionalLight ) {\n\n\t\t\t\tconst uniforms = cache.get( light );\n\n\t\t\t\tuniforms.color.copy( light.color ).multiplyScalar( light.intensity );\n\n\t\t\t\tif ( light.castShadow ) {\n\n\t\t\t\t\tconst shadow = light.shadow;\n\n\t\t\t\t\tconst shadowUniforms = shadowCache.get( light );\n\n\t\t\t\t\tshadowUniforms.shadowBias = shadow.bias;\n\t\t\t\t\tshadowUniforms.shadowNormalBias = shadow.normalBias;\n\t\t\t\t\tshadowUniforms.shadowRadius = shadow.radius;\n\t\t\t\t\tshadowUniforms.shadowMapSize = shadow.mapSize;\n\n\t\t\t\t\tstate.directionalShadow[ directionalLength ] = shadowUniforms;\n\t\t\t\t\tstate.directionalShadowMap[ directionalLength ] = shadowMap;\n\t\t\t\t\tstate.directionalShadowMatrix[ directionalLength ] = light.shadow.matrix;\n\n\t\t\t\t\tnumDirectionalShadows ++;\n\n\t\t\t\t}\n\n\t\t\t\tstate.directional[ directionalLength ] = uniforms;\n\n\t\t\t\tdirectionalLength ++;\n\n\t\t\t} else if ( light.isSpotLight ) {\n\n\t\t\t\tconst uniforms = cache.get( light );\n\n\t\t\t\tuniforms.position.setFromMatrixPosition( light.matrixWorld );\n\n\t\t\t\tuniforms.color.copy( color ).multiplyScalar( intensity );\n\t\t\t\tuniforms.distance = distance;\n\n\t\t\t\tuniforms.coneCos = Math.cos( light.angle );\n\t\t\t\tuniforms.penumbraCos = Math.cos( light.angle * ( 1 - light.penumbra ) );\n\t\t\t\tuniforms.decay = light.decay;\n\n\t\t\t\tif ( light.castShadow ) {\n\n\t\t\t\t\tconst shadow = light.shadow;\n\n\t\t\t\t\tconst shadowUniforms = shadowCache.get( light );\n\n\t\t\t\t\tshadowUniforms.shadowBias = shadow.bias;\n\t\t\t\t\tshadowUniforms.shadowNormalBias = shadow.normalBias;\n\t\t\t\t\tshadowUniforms.shadowRadius = shadow.radius;\n\t\t\t\t\tshadowUniforms.shadowMapSize = shadow.mapSize;\n\n\t\t\t\t\tstate.spotShadow[ spotLength ] = shadowUniforms;\n\t\t\t\t\tstate.spotShadowMap[ spotLength ] = shadowMap;\n\t\t\t\t\tstate.spotShadowMatrix[ spotLength ] = light.shadow.matrix;\n\n\t\t\t\t\tnumSpotShadows ++;\n\n\t\t\t\t}\n\n\t\t\t\tstate.spot[ spotLength ] = uniforms;\n\n\t\t\t\tspotLength ++;\n\n\t\t\t} else if ( light.isRectAreaLight ) {\n\n\t\t\t\tconst uniforms = cache.get( light );\n\n\t\t\t\t// (a) intensity is the total visible light emitted\n\t\t\t\t//uniforms.color.copy( color ).multiplyScalar( intensity / ( light.width * light.height * Math.PI ) );\n\n\t\t\t\t// (b) intensity is the brightness of the light\n\t\t\t\tuniforms.color.copy( color ).multiplyScalar( intensity );\n\n\t\t\t\tuniforms.halfWidth.set( light.width * 0.5, 0.0, 0.0 );\n\t\t\t\tuniforms.halfHeight.set( 0.0, light.height * 0.5, 0.0 );\n\n\t\t\t\tstate.rectArea[ rectAreaLength ] = uniforms;\n\n\t\t\t\trectAreaLength ++;\n\n\t\t\t} else if ( light.isPointLight ) {\n\n\t\t\t\tconst uniforms = cache.get( light );\n\n\t\t\t\tuniforms.color.copy( light.color ).multiplyScalar( light.intensity );\n\t\t\t\tuniforms.distance = light.distance;\n\t\t\t\tuniforms.decay = light.decay;\n\n\t\t\t\tif ( light.castShadow ) {\n\n\t\t\t\t\tconst shadow = light.shadow;\n\n\t\t\t\t\tconst shadowUniforms = shadowCache.get( light );\n\n\t\t\t\t\tshadowUniforms.shadowBias = shadow.bias;\n\t\t\t\t\tshadowUniforms.shadowNormalBias = shadow.normalBias;\n\t\t\t\t\tshadowUniforms.shadowRadius = shadow.radius;\n\t\t\t\t\tshadowUniforms.shadowMapSize = shadow.mapSize;\n\t\t\t\t\tshadowUniforms.shadowCameraNear = shadow.camera.near;\n\t\t\t\t\tshadowUniforms.shadowCameraFar = shadow.camera.far;\n\n\t\t\t\t\tstate.pointShadow[ pointLength ] = shadowUniforms;\n\t\t\t\t\tstate.pointShadowMap[ pointLength ] = shadowMap;\n\t\t\t\t\tstate.pointShadowMatrix[ pointLength ] = light.shadow.matrix;\n\n\t\t\t\t\tnumPointShadows ++;\n\n\t\t\t\t}\n\n\t\t\t\tstate.point[ pointLength ] = uniforms;\n\n\t\t\t\tpointLength ++;\n\n\t\t\t} else if ( light.isHemisphereLight ) {\n\n\t\t\t\tconst uniforms = cache.get( light );\n\n\t\t\t\tuniforms.skyColor.copy( light.color ).multiplyScalar( intensity );\n\t\t\t\tuniforms.groundColor.copy( light.groundColor ).multiplyScalar( intensity );\n\n\t\t\t\tstate.hemi[ hemiLength ] = uniforms;\n\n\t\t\t\themiLength ++;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( rectAreaLength > 0 ) {\n\n\t\t\tif ( capabilities.isWebGL2 ) {\n\n\t\t\t\t// WebGL 2\n\n\t\t\t\tstate.rectAreaLTC1 = UniformsLib.LTC_FLOAT_1;\n\t\t\t\tstate.rectAreaLTC2 = UniformsLib.LTC_FLOAT_2;\n\n\t\t\t} else {\n\n\t\t\t\t// WebGL 1\n\n\t\t\t\tif ( extensions.has( 'OES_texture_float_linear' ) === true ) {\n\n\t\t\t\t\tstate.rectAreaLTC1 = UniformsLib.LTC_FLOAT_1;\n\t\t\t\t\tstate.rectAreaLTC2 = UniformsLib.LTC_FLOAT_2;\n\n\t\t\t\t} else if ( extensions.has( 'OES_texture_half_float_linear' ) === true ) {\n\n\t\t\t\t\tstate.rectAreaLTC1 = UniformsLib.LTC_HALF_1;\n\t\t\t\t\tstate.rectAreaLTC2 = UniformsLib.LTC_HALF_2;\n\n\t\t\t\t} else {\n\n\t\t\t\t\tconsole.error( 'THREE.WebGLRenderer: Unable to use RectAreaLight. Missing WebGL extensions.' );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\tstate.ambient[ 0 ] = r;\n\t\tstate.ambient[ 1 ] = g;\n\t\tstate.ambient[ 2 ] = b;\n\n\t\tconst hash = state.hash;\n\n\t\tif ( hash.directionalLength !== directionalLength ||\n\t\t\thash.pointLength !== pointLength ||\n\t\t\thash.spotLength !== spotLength ||\n\t\t\thash.rectAreaLength !== rectAreaLength ||\n\t\t\thash.hemiLength !== hemiLength ||\n\t\t\thash.numDirectionalShadows !== numDirectionalShadows ||\n\t\t\thash.numPointShadows !== numPointShadows ||\n\t\t\thash.numSpotShadows !== numSpotShadows ) {\n\n\t\t\tstate.directional.length = directionalLength;\n\t\t\tstate.spot.length = spotLength;\n\t\t\tstate.rectArea.length = rectAreaLength;\n\t\t\tstate.point.length = pointLength;\n\t\t\tstate.hemi.length = hemiLength;\n\n\t\t\tstate.directionalShadow.length = numDirectionalShadows;\n\t\t\tstate.directionalShadowMap.length = numDirectionalShadows;\n\t\t\tstate.pointShadow.length = numPointShadows;\n\t\t\tstate.pointShadowMap.length = numPointShadows;\n\t\t\tstate.spotShadow.length = numSpotShadows;\n\t\t\tstate.spotShadowMap.length = numSpotShadows;\n\t\t\tstate.directionalShadowMatrix.length = numDirectionalShadows;\n\t\t\tstate.pointShadowMatrix.length = numPointShadows;\n\t\t\tstate.spotShadowMatrix.length = numSpotShadows;\n\n\t\t\thash.directionalLength = directionalLength;\n\t\t\thash.pointLength = pointLength;\n\t\t\thash.spotLength = spotLength;\n\t\t\thash.rectAreaLength = rectAreaLength;\n\t\t\thash.hemiLength = hemiLength;\n\n\t\t\thash.numDirectionalShadows = numDirectionalShadows;\n\t\t\thash.numPointShadows = numPointShadows;\n\t\t\thash.numSpotShadows = numSpotShadows;\n\n\t\t\tstate.version = nextVersion ++;\n\n\t\t}\n\n\t}\n\n\tfunction setupView( lights, camera ) {\n\n\t\tlet directionalLength = 0;\n\t\tlet pointLength = 0;\n\t\tlet spotLength = 0;\n\t\tlet rectAreaLength = 0;\n\t\tlet hemiLength = 0;\n\n\t\tconst viewMatrix = camera.matrixWorldInverse;\n\n\t\tfor ( let i = 0, l = lights.length; i < l; i ++ ) {\n\n\t\t\tconst light = lights[ i ];\n\n\t\t\tif ( light.isDirectionalLight ) {\n\n\t\t\t\tconst uniforms = state.directional[ directionalLength ];\n\n\t\t\t\tuniforms.direction.setFromMatrixPosition( light.matrixWorld );\n\t\t\t\tvector3.setFromMatrixPosition( light.target.matrixWorld );\n\t\t\t\tuniforms.direction.sub( vector3 );\n\t\t\t\tuniforms.direction.transformDirection( viewMatrix );\n\n\t\t\t\tdirectionalLength ++;\n\n\t\t\t} else if ( light.isSpotLight ) {\n\n\t\t\t\tconst uniforms = state.spot[ spotLength ];\n\n\t\t\t\tuniforms.position.setFromMatrixPosition( light.matrixWorld );\n\t\t\t\tuniforms.position.applyMatrix4( viewMatrix );\n\n\t\t\t\tuniforms.direction.setFromMatrixPosition( light.matrixWorld );\n\t\t\t\tvector3.setFromMatrixPosition( light.target.matrixWorld );\n\t\t\t\tuniforms.direction.sub( vector3 );\n\t\t\t\tuniforms.direction.transformDirection( viewMatrix );\n\n\t\t\t\tspotLength ++;\n\n\t\t\t} else if ( light.isRectAreaLight ) {\n\n\t\t\t\tconst uniforms = state.rectArea[ rectAreaLength ];\n\n\t\t\t\tuniforms.position.setFromMatrixPosition( light.matrixWorld );\n\t\t\t\tuniforms.position.applyMatrix4( viewMatrix );\n\n\t\t\t\t// extract local rotation of light to derive width/height half vectors\n\t\t\t\tmatrix42.identity();\n\t\t\t\tmatrix4.copy( light.matrixWorld );\n\t\t\t\tmatrix4.premultiply( viewMatrix );\n\t\t\t\tmatrix42.extractRotation( matrix4 );\n\n\t\t\t\tuniforms.halfWidth.set( light.width * 0.5, 0.0, 0.0 );\n\t\t\t\tuniforms.halfHeight.set( 0.0, light.height * 0.5, 0.0 );\n\n\t\t\t\tuniforms.halfWidth.applyMatrix4( matrix42 );\n\t\t\t\tuniforms.halfHeight.applyMatrix4( matrix42 );\n\n\t\t\t\trectAreaLength ++;\n\n\t\t\t} else if ( light.isPointLight ) {\n\n\t\t\t\tconst uniforms = state.point[ pointLength ];\n\n\t\t\t\tuniforms.position.setFromMatrixPosition( light.matrixWorld );\n\t\t\t\tuniforms.position.applyMatrix4( viewMatrix );\n\n\t\t\t\tpointLength ++;\n\n\t\t\t} else if ( light.isHemisphereLight ) {\n\n\t\t\t\tconst uniforms = state.hemi[ hemiLength ];\n\n\t\t\t\tuniforms.direction.setFromMatrixPosition( light.matrixWorld );\n\t\t\t\tuniforms.direction.transformDirection( viewMatrix );\n\t\t\t\tuniforms.direction.normalize();\n\n\t\t\t\themiLength ++;\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\treturn {\n\t\tsetup: setup,\n\t\tsetupView: setupView,\n\t\tstate: state\n\t};\n\n}\n\nfunction WebGLRenderState( extensions, capabilities ) {\n\n\tconst lights = new WebGLLights( extensions, capabilities );\n\n\tconst lightsArray = [];\n\tconst shadowsArray = [];\n\n\tfunction init() {\n\n\t\tlightsArray.length = 0;\n\t\tshadowsArray.length = 0;\n\n\t}\n\n\tfunction pushLight( light ) {\n\n\t\tlightsArray.push( light );\n\n\t}\n\n\tfunction pushShadow( shadowLight ) {\n\n\t\tshadowsArray.push( shadowLight );\n\n\t}\n\n\tfunction setupLights() {\n\n\t\tlights.setup( lightsArray );\n\n\t}\n\n\tfunction setupLightsView( camera ) {\n\n\t\tlights.setupView( lightsArray, camera );\n\n\t}\n\n\tconst state = {\n\t\tlightsArray: lightsArray,\n\t\tshadowsArray: shadowsArray,\n\n\t\tlights: lights\n\t};\n\n\treturn {\n\t\tinit: init,\n\t\tstate: state,\n\t\tsetupLights: setupLights,\n\t\tsetupLightsView: setupLightsView,\n\n\t\tpushLight: pushLight,\n\t\tpushShadow: pushShadow\n\t};\n\n}\n\nfunction WebGLRenderStates( extensions, capabilities ) {\n\n\tlet renderStates = new WeakMap();\n\n\tfunction get( scene, renderCallDepth = 0 ) {\n\n\t\tlet renderState;\n\n\t\tif ( renderStates.has( scene ) === false ) {\n\n\t\t\trenderState = new WebGLRenderState( extensions, capabilities );\n\t\t\trenderStates.set( scene, [] );\n\t\t\trenderStates.get( scene ).push( renderState );\n\n\t\t} else {\n\n\t\t\tif ( renderCallDepth >= renderStates.get( scene ).length ) {\n\n\t\t\t\trenderState = new WebGLRenderState( extensions, capabilities );\n\t\t\t\trenderStates.get( scene ).push( renderState );\n\n\t\t\t} else {\n\n\t\t\t\trenderState = renderStates.get( scene )[ renderCallDepth ];\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn renderState;\n\n\t}\n\n\tfunction dispose() {\n\n\t\trenderStates = new WeakMap();\n\n\t}\n\n\treturn {\n\t\tget: get,\n\t\tdispose: dispose\n\t};\n\n}\n\n/**\n * parameters = {\n *\n *  opacity: <float>,\n *\n *  map: new THREE.Texture( <Image> ),\n *\n *  alphaMap: new THREE.Texture( <Image> ),\n *\n *  displacementMap: new THREE.Texture( <Image> ),\n *  displacementScale: <float>,\n *  displacementBias: <float>,\n *\n *  wireframe: <boolean>,\n *  wireframeLinewidth: <float>\n * }\n */\n\nfunction MeshDepthMaterial( parameters ) {\n\n\tMaterial.call( this );\n\n\tthis.type = 'MeshDepthMaterial';\n\n\tthis.depthPacking = BasicDepthPacking;\n\n\tthis.skinning = false;\n\tthis.morphTargets = false;\n\n\tthis.map = null;\n\n\tthis.alphaMap = null;\n\n\tthis.displacementMap = null;\n\tthis.displacementScale = 1;\n\tthis.displacementBias = 0;\n\n\tthis.wireframe = false;\n\tthis.wireframeLinewidth = 1;\n\n\tthis.fog = false;\n\n\tthis.setValues( parameters );\n\n}\n\nMeshDepthMaterial.prototype = Object.create( Material.prototype );\nMeshDepthMaterial.prototype.constructor = MeshDepthMaterial;\n\nMeshDepthMaterial.prototype.isMeshDepthMaterial = true;\n\nMeshDepthMaterial.prototype.copy = function ( source ) {\n\n\tMaterial.prototype.copy.call( this, source );\n\n\tthis.depthPacking = source.depthPacking;\n\n\tthis.skinning = source.skinning;\n\tthis.morphTargets = source.morphTargets;\n\n\tthis.map = source.map;\n\n\tthis.alphaMap = source.alphaMap;\n\n\tthis.displacementMap = source.displacementMap;\n\tthis.displacementScale = source.displacementScale;\n\tthis.displacementBias = source.displacementBias;\n\n\tthis.wireframe = source.wireframe;\n\tthis.wireframeLinewidth = source.wireframeLinewidth;\n\n\treturn this;\n\n};\n\n/**\n * parameters = {\n *\n *  referencePosition: <float>,\n *  nearDistance: <float>,\n *  farDistance: <float>,\n *\n *  skinning: <bool>,\n *  morphTargets: <bool>,\n *\n *  map: new THREE.Texture( <Image> ),\n *\n *  alphaMap: new THREE.Texture( <Image> ),\n *\n *  displacementMap: new THREE.Texture( <Image> ),\n *  displacementScale: <float>,\n *  displacementBias: <float>\n *\n * }\n */\n\nfunction MeshDistanceMaterial( parameters ) {\n\n\tMaterial.call( this );\n\n\tthis.type = 'MeshDistanceMaterial';\n\n\tthis.referencePosition = new Vector3();\n\tthis.nearDistance = 1;\n\tthis.farDistance = 1000;\n\n\tthis.skinning = false;\n\tthis.morphTargets = false;\n\n\tthis.map = null;\n\n\tthis.alphaMap = null;\n\n\tthis.displacementMap = null;\n\tthis.displacementScale = 1;\n\tthis.displacementBias = 0;\n\n\tthis.fog = false;\n\n\tthis.setValues( parameters );\n\n}\n\nMeshDistanceMaterial.prototype = Object.create( Material.prototype );\nMeshDistanceMaterial.prototype.constructor = MeshDistanceMaterial;\n\nMeshDistanceMaterial.prototype.isMeshDistanceMaterial = true;\n\nMeshDistanceMaterial.prototype.copy = function ( source ) {\n\n\tMaterial.prototype.copy.call( this, source );\n\n\tthis.referencePosition.copy( source.referencePosition );\n\tthis.nearDistance = source.nearDistance;\n\tthis.farDistance = source.farDistance;\n\n\tthis.skinning = source.skinning;\n\tthis.morphTargets = source.morphTargets;\n\n\tthis.map = source.map;\n\n\tthis.alphaMap = source.alphaMap;\n\n\tthis.displacementMap = source.displacementMap;\n\tthis.displacementScale = source.displacementScale;\n\tthis.displacementBias = source.displacementBias;\n\n\treturn this;\n\n};\n\nvar vsm_frag = \"uniform sampler2D shadow_pass;\\nuniform vec2 resolution;\\nuniform float radius;\\n#include <packing>\\nvoid main() {\\n\\tfloat mean = 0.0;\\n\\tfloat squared_mean = 0.0;\\n\\tfloat depth = unpackRGBAToDepth( texture2D( shadow_pass, ( gl_FragCoord.xy ) / resolution ) );\\n\\tfor ( float i = -1.0; i < 1.0 ; i += SAMPLE_RATE) {\\n\\t\\t#ifdef HORIZONTAL_PASS\\n\\t\\t\\tvec2 distribution = unpackRGBATo2Half( texture2D( shadow_pass, ( gl_FragCoord.xy + vec2( i, 0.0 ) * radius ) / resolution ) );\\n\\t\\t\\tmean += distribution.x;\\n\\t\\t\\tsquared_mean += distribution.y * distribution.y + distribution.x * distribution.x;\\n\\t\\t#else\\n\\t\\t\\tfloat depth = unpackRGBAToDepth( texture2D( shadow_pass, ( gl_FragCoord.xy + vec2( 0.0, i ) * radius ) / resolution ) );\\n\\t\\t\\tmean += depth;\\n\\t\\t\\tsquared_mean += depth * depth;\\n\\t\\t#endif\\n\\t}\\n\\tmean = mean * HALF_SAMPLE_RATE;\\n\\tsquared_mean = squared_mean * HALF_SAMPLE_RATE;\\n\\tfloat std_dev = sqrt( squared_mean - mean * mean );\\n\\tgl_FragColor = pack2HalfToRGBA( vec2( mean, std_dev ) );\\n}\";\n\nvar vsm_vert = \"void main() {\\n\\tgl_Position = vec4( position, 1.0 );\\n}\";\n\nfunction WebGLShadowMap( _renderer, _objects, maxTextureSize ) {\n\n\tlet _frustum = new Frustum();\n\n\tconst _shadowMapSize = new Vector2(),\n\t\t_viewportSize = new Vector2(),\n\n\t\t_viewport = new Vector4(),\n\n\t\t_depthMaterials = [],\n\t\t_distanceMaterials = [],\n\n\t\t_materialCache = {};\n\n\tconst shadowSide = { 0: BackSide, 1: FrontSide, 2: DoubleSide };\n\n\tconst shadowMaterialVertical = new ShaderMaterial( {\n\n\t\tdefines: {\n\t\t\tSAMPLE_RATE: 2.0 / 8.0,\n\t\t\tHALF_SAMPLE_RATE: 1.0 / 8.0\n\t\t},\n\n\t\tuniforms: {\n\t\t\tshadow_pass: { value: null },\n\t\t\tresolution: { value: new Vector2() },\n\t\t\tradius: { value: 4.0 }\n\t\t},\n\n\t\tvertexShader: vsm_vert,\n\n\t\tfragmentShader: vsm_frag\n\n\t} );\n\n\tconst shadowMaterialHorizontal = shadowMaterialVertical.clone();\n\tshadowMaterialHorizontal.defines.HORIZONTAL_PASS = 1;\n\n\tconst fullScreenTri = new BufferGeometry();\n\tfullScreenTri.setAttribute(\n\t\t'position',\n\t\tnew BufferAttribute(\n\t\t\tnew Float32Array( [ - 1, - 1, 0.5, 3, - 1, 0.5, - 1, 3, 0.5 ] ),\n\t\t\t3\n\t\t)\n\t);\n\n\tconst fullScreenMesh = new Mesh( fullScreenTri, shadowMaterialVertical );\n\n\tconst scope = this;\n\n\tthis.enabled = false;\n\n\tthis.autoUpdate = true;\n\tthis.needsUpdate = false;\n\n\tthis.type = PCFShadowMap;\n\n\tthis.render = function ( lights, scene, camera ) {\n\n\t\tif ( scope.enabled === false ) return;\n\t\tif ( scope.autoUpdate === false && scope.needsUpdate === false ) return;\n\n\t\tif ( lights.length === 0 ) return;\n\n\t\tconst currentRenderTarget = _renderer.getRenderTarget();\n\t\tconst activeCubeFace = _renderer.getActiveCubeFace();\n\t\tconst activeMipmapLevel = _renderer.getActiveMipmapLevel();\n\n\t\tconst _state = _renderer.state;\n\n\t\t// Set GL state for depth map.\n\t\t_state.setBlending( NoBlending );\n\t\t_state.buffers.color.setClear( 1, 1, 1, 1 );\n\t\t_state.buffers.depth.setTest( true );\n\t\t_state.setScissorTest( false );\n\n\t\t// render depth map\n\n\t\tfor ( let i = 0, il = lights.length; i < il; i ++ ) {\n\n\t\t\tconst light = lights[ i ];\n\t\t\tconst shadow = light.shadow;\n\n\t\t\tif ( shadow === undefined ) {\n\n\t\t\t\tconsole.warn( 'THREE.WebGLShadowMap:', light, 'has no shadow.' );\n\t\t\t\tcontinue;\n\n\t\t\t}\n\n\t\t\tif ( shadow.autoUpdate === false && shadow.needsUpdate === false ) continue;\n\n\t\t\t_shadowMapSize.copy( shadow.mapSize );\n\n\t\t\tconst shadowFrameExtents = shadow.getFrameExtents();\n\n\t\t\t_shadowMapSize.multiply( shadowFrameExtents );\n\n\t\t\t_viewportSize.copy( shadow.mapSize );\n\n\t\t\tif ( _shadowMapSize.x > maxTextureSize || _shadowMapSize.y > maxTextureSize ) {\n\n\t\t\t\tif ( _shadowMapSize.x > maxTextureSize ) {\n\n\t\t\t\t\t_viewportSize.x = Math.floor( maxTextureSize / shadowFrameExtents.x );\n\t\t\t\t\t_shadowMapSize.x = _viewportSize.x * shadowFrameExtents.x;\n\t\t\t\t\tshadow.mapSize.x = _viewportSize.x;\n\n\t\t\t\t}\n\n\t\t\t\tif ( _shadowMapSize.y > maxTextureSize ) {\n\n\t\t\t\t\t_viewportSize.y = Math.floor( maxTextureSize / shadowFrameExtents.y );\n\t\t\t\t\t_shadowMapSize.y = _viewportSize.y * shadowFrameExtents.y;\n\t\t\t\t\tshadow.mapSize.y = _viewportSize.y;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tif ( shadow.map === null && ! shadow.isPointLightShadow && this.type === VSMShadowMap ) {\n\n\t\t\t\tconst pars = { minFilter: LinearFilter, magFilter: LinearFilter, format: RGBAFormat };\n\n\t\t\t\tshadow.map = new WebGLRenderTarget( _shadowMapSize.x, _shadowMapSize.y, pars );\n\t\t\t\tshadow.map.texture.name = light.name + '.shadowMap';\n\n\t\t\t\tshadow.mapPass = new WebGLRenderTarget( _shadowMapSize.x, _shadowMapSize.y, pars );\n\n\t\t\t\tshadow.camera.updateProjectionMatrix();\n\n\t\t\t}\n\n\t\t\tif ( shadow.map === null ) {\n\n\t\t\t\tconst pars = { minFilter: NearestFilter, magFilter: NearestFilter, format: RGBAFormat };\n\n\t\t\t\tshadow.map = new WebGLRenderTarget( _shadowMapSize.x, _shadowMapSize.y, pars );\n\t\t\t\tshadow.map.texture.name = light.name + '.shadowMap';\n\n\t\t\t\tshadow.camera.updateProjectionMatrix();\n\n\t\t\t}\n\n\t\t\t_renderer.setRenderTarget( shadow.map );\n\t\t\t_renderer.clear();\n\n\t\t\tconst viewportCount = shadow.getViewportCount();\n\n\t\t\tfor ( let vp = 0; vp < viewportCount; vp ++ ) {\n\n\t\t\t\tconst viewport = shadow.getViewport( vp );\n\n\t\t\t\t_viewport.set(\n\t\t\t\t\t_viewportSize.x * viewport.x,\n\t\t\t\t\t_viewportSize.y * viewport.y,\n\t\t\t\t\t_viewportSize.x * viewport.z,\n\t\t\t\t\t_viewportSize.y * viewport.w\n\t\t\t\t);\n\n\t\t\t\t_state.viewport( _viewport );\n\n\t\t\t\tshadow.updateMatrices( light, vp );\n\n\t\t\t\t_frustum = shadow.getFrustum();\n\n\t\t\t\trenderObject( scene, camera, shadow.camera, light, this.type );\n\n\t\t\t}\n\n\t\t\t// do blur pass for VSM\n\n\t\t\tif ( ! shadow.isPointLightShadow && this.type === VSMShadowMap ) {\n\n\t\t\t\tVSMPass( shadow, camera );\n\n\t\t\t}\n\n\t\t\tshadow.needsUpdate = false;\n\n\t\t}\n\n\t\tscope.needsUpdate = false;\n\n\t\t_renderer.setRenderTarget( currentRenderTarget, activeCubeFace, activeMipmapLevel );\n\n\t};\n\n\tfunction VSMPass( shadow, camera ) {\n\n\t\tconst geometry = _objects.update( fullScreenMesh );\n\n\t\t// vertical pass\n\n\t\tshadowMaterialVertical.uniforms.shadow_pass.value = shadow.map.texture;\n\t\tshadowMaterialVertical.uniforms.resolution.value = shadow.mapSize;\n\t\tshadowMaterialVertical.uniforms.radius.value = shadow.radius;\n\t\t_renderer.setRenderTarget( shadow.mapPass );\n\t\t_renderer.clear();\n\t\t_renderer.renderBufferDirect( camera, null, geometry, shadowMaterialVertical, fullScreenMesh, null );\n\n\t\t// horizontal pass\n\n\t\tshadowMaterialHorizontal.uniforms.shadow_pass.value = shadow.mapPass.texture;\n\t\tshadowMaterialHorizontal.uniforms.resolution.value = shadow.mapSize;\n\t\tshadowMaterialHorizontal.uniforms.radius.value = shadow.radius;\n\t\t_renderer.setRenderTarget( shadow.map );\n\t\t_renderer.clear();\n\t\t_renderer.renderBufferDirect( camera, null, geometry, shadowMaterialHorizontal, fullScreenMesh, null );\n\n\t}\n\n\tfunction getDepthMaterialVariant( useMorphing, useSkinning, useInstancing ) {\n\n\t\tconst index = useMorphing << 0 | useSkinning << 1 | useInstancing << 2;\n\n\t\tlet material = _depthMaterials[ index ];\n\n\t\tif ( material === undefined ) {\n\n\t\t\tmaterial = new MeshDepthMaterial( {\n\n\t\t\t\tdepthPacking: RGBADepthPacking,\n\n\t\t\t\tmorphTargets: useMorphing,\n\t\t\t\tskinning: useSkinning\n\n\t\t\t} );\n\n\t\t\t_depthMaterials[ index ] = material;\n\n\t\t}\n\n\t\treturn material;\n\n\t}\n\n\tfunction getDistanceMaterialVariant( useMorphing, useSkinning, useInstancing ) {\n\n\t\tconst index = useMorphing << 0 | useSkinning << 1 | useInstancing << 2;\n\n\t\tlet material = _distanceMaterials[ index ];\n\n\t\tif ( material === undefined ) {\n\n\t\t\tmaterial = new MeshDistanceMaterial( {\n\n\t\t\t\tmorphTargets: useMorphing,\n\t\t\t\tskinning: useSkinning\n\n\t\t\t} );\n\n\t\t\t_distanceMaterials[ index ] = material;\n\n\t\t}\n\n\t\treturn material;\n\n\t}\n\n\tfunction getDepthMaterial( object, geometry, material, light, shadowCameraNear, shadowCameraFar, type ) {\n\n\t\tlet result = null;\n\n\t\tlet getMaterialVariant = getDepthMaterialVariant;\n\t\tlet customMaterial = object.customDepthMaterial;\n\n\t\tif ( light.isPointLight === true ) {\n\n\t\t\tgetMaterialVariant = getDistanceMaterialVariant;\n\t\t\tcustomMaterial = object.customDistanceMaterial;\n\n\t\t}\n\n\t\tif ( customMaterial === undefined ) {\n\n\t\t\tlet useMorphing = false;\n\n\t\t\tif ( material.morphTargets === true ) {\n\n\t\t\t\tuseMorphing = geometry.morphAttributes && geometry.morphAttributes.position && geometry.morphAttributes.position.length > 0;\n\n\t\t\t}\n\n\t\t\tlet useSkinning = false;\n\n\t\t\tif ( object.isSkinnedMesh === true ) {\n\n\t\t\t\tif ( material.skinning === true ) {\n\n\t\t\t\t\tuseSkinning = true;\n\n\t\t\t\t} else {\n\n\t\t\t\t\tconsole.warn( 'THREE.WebGLShadowMap: THREE.SkinnedMesh with material.skinning set to false:', object );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tconst useInstancing = object.isInstancedMesh === true;\n\n\t\t\tresult = getMaterialVariant( useMorphing, useSkinning, useInstancing );\n\n\t\t} else {\n\n\t\t\tresult = customMaterial;\n\n\t\t}\n\n\t\tif ( _renderer.localClippingEnabled &&\n\t\t\t\tmaterial.clipShadows === true &&\n\t\t\t\tmaterial.clippingPlanes.length !== 0 ) {\n\n\t\t\t// in this case we need a unique material instance reflecting the\n\t\t\t// appropriate state\n\n\t\t\tconst keyA = result.uuid, keyB = material.uuid;\n\n\t\t\tlet materialsForVariant = _materialCache[ keyA ];\n\n\t\t\tif ( materialsForVariant === undefined ) {\n\n\t\t\t\tmaterialsForVariant = {};\n\t\t\t\t_materialCache[ keyA ] = materialsForVariant;\n\n\t\t\t}\n\n\t\t\tlet cachedMaterial = materialsForVariant[ keyB ];\n\n\t\t\tif ( cachedMaterial === undefined ) {\n\n\t\t\t\tcachedMaterial = result.clone();\n\t\t\t\tmaterialsForVariant[ keyB ] = cachedMaterial;\n\n\t\t\t}\n\n\t\t\tresult = cachedMaterial;\n\n\t\t}\n\n\t\tresult.visible = material.visible;\n\t\tresult.wireframe = material.wireframe;\n\n\t\tif ( type === VSMShadowMap ) {\n\n\t\t\tresult.side = ( material.shadowSide !== null ) ? material.shadowSide : material.side;\n\n\t\t} else {\n\n\t\t\tresult.side = ( material.shadowSide !== null ) ? material.shadowSide : shadowSide[ material.side ];\n\n\t\t}\n\n\t\tresult.clipShadows = material.clipShadows;\n\t\tresult.clippingPlanes = material.clippingPlanes;\n\t\tresult.clipIntersection = material.clipIntersection;\n\n\t\tresult.wireframeLinewidth = material.wireframeLinewidth;\n\t\tresult.linewidth = material.linewidth;\n\n\t\tif ( light.isPointLight === true && result.isMeshDistanceMaterial === true ) {\n\n\t\t\tresult.referencePosition.setFromMatrixPosition( light.matrixWorld );\n\t\t\tresult.nearDistance = shadowCameraNear;\n\t\t\tresult.farDistance = shadowCameraFar;\n\n\t\t}\n\n\t\treturn result;\n\n\t}\n\n\tfunction renderObject( object, camera, shadowCamera, light, type ) {\n\n\t\tif ( object.visible === false ) return;\n\n\t\tconst visible = object.layers.test( camera.layers );\n\n\t\tif ( visible && ( object.isMesh || object.isLine || object.isPoints ) ) {\n\n\t\t\tif ( ( object.castShadow || ( object.receiveShadow && type === VSMShadowMap ) ) && ( ! object.frustumCulled || _frustum.intersectsObject( object ) ) ) {\n\n\t\t\t\tobject.modelViewMatrix.multiplyMatrices( shadowCamera.matrixWorldInverse, object.matrixWorld );\n\n\t\t\t\tconst geometry = _objects.update( object );\n\t\t\t\tconst material = object.material;\n\n\t\t\t\tif ( Array.isArray( material ) ) {\n\n\t\t\t\t\tconst groups = geometry.groups;\n\n\t\t\t\t\tfor ( let k = 0, kl = groups.length; k < kl; k ++ ) {\n\n\t\t\t\t\t\tconst group = groups[ k ];\n\t\t\t\t\t\tconst groupMaterial = material[ group.materialIndex ];\n\n\t\t\t\t\t\tif ( groupMaterial && groupMaterial.visible ) {\n\n\t\t\t\t\t\t\tconst depthMaterial = getDepthMaterial( object, geometry, groupMaterial, light, shadowCamera.near, shadowCamera.far, type );\n\n\t\t\t\t\t\t\t_renderer.renderBufferDirect( shadowCamera, null, geometry, depthMaterial, object, group );\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t} else if ( material.visible ) {\n\n\t\t\t\t\tconst depthMaterial = getDepthMaterial( object, geometry, material, light, shadowCamera.near, shadowCamera.far, type );\n\n\t\t\t\t\t_renderer.renderBufferDirect( shadowCamera, null, geometry, depthMaterial, object, null );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\tconst children = object.children;\n\n\t\tfor ( let i = 0, l = children.length; i < l; i ++ ) {\n\n\t\t\trenderObject( children[ i ], camera, shadowCamera, light, type );\n\n\t\t}\n\n\t}\n\n}\n\nfunction WebGLState( gl, extensions, capabilities ) {\n\n\tconst isWebGL2 = capabilities.isWebGL2;\n\n\tfunction ColorBuffer() {\n\n\t\tlet locked = false;\n\n\t\tconst color = new Vector4();\n\t\tlet currentColorMask = null;\n\t\tconst currentColorClear = new Vector4( 0, 0, 0, 0 );\n\n\t\treturn {\n\n\t\t\tsetMask: function ( colorMask ) {\n\n\t\t\t\tif ( currentColorMask !== colorMask && ! locked ) {\n\n\t\t\t\t\tgl.colorMask( colorMask, colorMask, colorMask, colorMask );\n\t\t\t\t\tcurrentColorMask = colorMask;\n\n\t\t\t\t}\n\n\t\t\t},\n\n\t\t\tsetLocked: function ( lock ) {\n\n\t\t\t\tlocked = lock;\n\n\t\t\t},\n\n\t\t\tsetClear: function ( r, g, b, a, premultipliedAlpha ) {\n\n\t\t\t\tif ( premultipliedAlpha === true ) {\n\n\t\t\t\t\tr *= a; g *= a; b *= a;\n\n\t\t\t\t}\n\n\t\t\t\tcolor.set( r, g, b, a );\n\n\t\t\t\tif ( currentColorClear.equals( color ) === false ) {\n\n\t\t\t\t\tgl.clearColor( r, g, b, a );\n\t\t\t\t\tcurrentColorClear.copy( color );\n\n\t\t\t\t}\n\n\t\t\t},\n\n\t\t\treset: function () {\n\n\t\t\t\tlocked = false;\n\n\t\t\t\tcurrentColorMask = null;\n\t\t\t\tcurrentColorClear.set( - 1, 0, 0, 0 ); // set to invalid state\n\n\t\t\t}\n\n\t\t};\n\n\t}\n\n\tfunction DepthBuffer() {\n\n\t\tlet locked = false;\n\n\t\tlet currentDepthMask = null;\n\t\tlet currentDepthFunc = null;\n\t\tlet currentDepthClear = null;\n\n\t\treturn {\n\n\t\t\tsetTest: function ( depthTest ) {\n\n\t\t\t\tif ( depthTest ) {\n\n\t\t\t\t\tenable( 2929 );\n\n\t\t\t\t} else {\n\n\t\t\t\t\tdisable( 2929 );\n\n\t\t\t\t}\n\n\t\t\t},\n\n\t\t\tsetMask: function ( depthMask ) {\n\n\t\t\t\tif ( currentDepthMask !== depthMask && ! locked ) {\n\n\t\t\t\t\tgl.depthMask( depthMask );\n\t\t\t\t\tcurrentDepthMask = depthMask;\n\n\t\t\t\t}\n\n\t\t\t},\n\n\t\t\tsetFunc: function ( depthFunc ) {\n\n\t\t\t\tif ( currentDepthFunc !== depthFunc ) {\n\n\t\t\t\t\tif ( depthFunc ) {\n\n\t\t\t\t\t\tswitch ( depthFunc ) {\n\n\t\t\t\t\t\t\tcase NeverDepth:\n\n\t\t\t\t\t\t\t\tgl.depthFunc( 512 );\n\t\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\t\tcase AlwaysDepth:\n\n\t\t\t\t\t\t\t\tgl.depthFunc( 519 );\n\t\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\t\tcase LessDepth:\n\n\t\t\t\t\t\t\t\tgl.depthFunc( 513 );\n\t\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\t\tcase LessEqualDepth:\n\n\t\t\t\t\t\t\t\tgl.depthFunc( 515 );\n\t\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\t\tcase EqualDepth:\n\n\t\t\t\t\t\t\t\tgl.depthFunc( 514 );\n\t\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\t\tcase GreaterEqualDepth:\n\n\t\t\t\t\t\t\t\tgl.depthFunc( 518 );\n\t\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\t\tcase GreaterDepth:\n\n\t\t\t\t\t\t\t\tgl.depthFunc( 516 );\n\t\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\t\tcase NotEqualDepth:\n\n\t\t\t\t\t\t\t\tgl.depthFunc( 517 );\n\t\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\t\tdefault:\n\n\t\t\t\t\t\t\t\tgl.depthFunc( 515 );\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\tgl.depthFunc( 515 );\n\n\t\t\t\t\t}\n\n\t\t\t\t\tcurrentDepthFunc = depthFunc;\n\n\t\t\t\t}\n\n\t\t\t},\n\n\t\t\tsetLocked: function ( lock ) {\n\n\t\t\t\tlocked = lock;\n\n\t\t\t},\n\n\t\t\tsetClear: function ( depth ) {\n\n\t\t\t\tif ( currentDepthClear !== depth ) {\n\n\t\t\t\t\tgl.clearDepth( depth );\n\t\t\t\t\tcurrentDepthClear = depth;\n\n\t\t\t\t}\n\n\t\t\t},\n\n\t\t\treset: function () {\n\n\t\t\t\tlocked = false;\n\n\t\t\t\tcurrentDepthMask = null;\n\t\t\t\tcurrentDepthFunc = null;\n\t\t\t\tcurrentDepthClear = null;\n\n\t\t\t}\n\n\t\t};\n\n\t}\n\n\tfunction StencilBuffer() {\n\n\t\tlet locked = false;\n\n\t\tlet currentStencilMask = null;\n\t\tlet currentStencilFunc = null;\n\t\tlet currentStencilRef = null;\n\t\tlet currentStencilFuncMask = null;\n\t\tlet currentStencilFail = null;\n\t\tlet currentStencilZFail = null;\n\t\tlet currentStencilZPass = null;\n\t\tlet currentStencilClear = null;\n\n\t\treturn {\n\n\t\t\tsetTest: function ( stencilTest ) {\n\n\t\t\t\tif ( ! locked ) {\n\n\t\t\t\t\tif ( stencilTest ) {\n\n\t\t\t\t\t\tenable( 2960 );\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\tdisable( 2960 );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t},\n\n\t\t\tsetMask: function ( stencilMask ) {\n\n\t\t\t\tif ( currentStencilMask !== stencilMask && ! locked ) {\n\n\t\t\t\t\tgl.stencilMask( stencilMask );\n\t\t\t\t\tcurrentStencilMask = stencilMask;\n\n\t\t\t\t}\n\n\t\t\t},\n\n\t\t\tsetFunc: function ( stencilFunc, stencilRef, stencilMask ) {\n\n\t\t\t\tif ( currentStencilFunc !== stencilFunc ||\n\t\t\t\t     currentStencilRef !== stencilRef ||\n\t\t\t\t     currentStencilFuncMask !== stencilMask ) {\n\n\t\t\t\t\tgl.stencilFunc( stencilFunc, stencilRef, stencilMask );\n\n\t\t\t\t\tcurrentStencilFunc = stencilFunc;\n\t\t\t\t\tcurrentStencilRef = stencilRef;\n\t\t\t\t\tcurrentStencilFuncMask = stencilMask;\n\n\t\t\t\t}\n\n\t\t\t},\n\n\t\t\tsetOp: function ( stencilFail, stencilZFail, stencilZPass ) {\n\n\t\t\t\tif ( currentStencilFail !== stencilFail ||\n\t\t\t\t     currentStencilZFail !== stencilZFail ||\n\t\t\t\t     currentStencilZPass !== stencilZPass ) {\n\n\t\t\t\t\tgl.stencilOp( stencilFail, stencilZFail, stencilZPass );\n\n\t\t\t\t\tcurrentStencilFail = stencilFail;\n\t\t\t\t\tcurrentStencilZFail = stencilZFail;\n\t\t\t\t\tcurrentStencilZPass = stencilZPass;\n\n\t\t\t\t}\n\n\t\t\t},\n\n\t\t\tsetLocked: function ( lock ) {\n\n\t\t\t\tlocked = lock;\n\n\t\t\t},\n\n\t\t\tsetClear: function ( stencil ) {\n\n\t\t\t\tif ( currentStencilClear !== stencil ) {\n\n\t\t\t\t\tgl.clearStencil( stencil );\n\t\t\t\t\tcurrentStencilClear = stencil;\n\n\t\t\t\t}\n\n\t\t\t},\n\n\t\t\treset: function () {\n\n\t\t\t\tlocked = false;\n\n\t\t\t\tcurrentStencilMask = null;\n\t\t\t\tcurrentStencilFunc = null;\n\t\t\t\tcurrentStencilRef = null;\n\t\t\t\tcurrentStencilFuncMask = null;\n\t\t\t\tcurrentStencilFail = null;\n\t\t\t\tcurrentStencilZFail = null;\n\t\t\t\tcurrentStencilZPass = null;\n\t\t\t\tcurrentStencilClear = null;\n\n\t\t\t}\n\n\t\t};\n\n\t}\n\n\t//\n\n\tconst colorBuffer = new ColorBuffer();\n\tconst depthBuffer = new DepthBuffer();\n\tconst stencilBuffer = new StencilBuffer();\n\n\tlet enabledCapabilities = {};\n\n\tlet currentProgram = null;\n\n\tlet currentBlendingEnabled = null;\n\tlet currentBlending = null;\n\tlet currentBlendEquation = null;\n\tlet currentBlendSrc = null;\n\tlet currentBlendDst = null;\n\tlet currentBlendEquationAlpha = null;\n\tlet currentBlendSrcAlpha = null;\n\tlet currentBlendDstAlpha = null;\n\tlet currentPremultipledAlpha = false;\n\n\tlet currentFlipSided = null;\n\tlet currentCullFace = null;\n\n\tlet currentLineWidth = null;\n\n\tlet currentPolygonOffsetFactor = null;\n\tlet currentPolygonOffsetUnits = null;\n\n\tconst maxTextures = gl.getParameter( 35661 );\n\n\tlet lineWidthAvailable = false;\n\tlet version = 0;\n\tconst glVersion = gl.getParameter( 7938 );\n\n\tif ( glVersion.indexOf( 'WebGL' ) !== - 1 ) {\n\n\t\tversion = parseFloat( /^WebGL (\\d)/.exec( glVersion )[ 1 ] );\n\t\tlineWidthAvailable = ( version >= 1.0 );\n\n\t} else if ( glVersion.indexOf( 'OpenGL ES' ) !== - 1 ) {\n\n\t\tversion = parseFloat( /^OpenGL ES (\\d)/.exec( glVersion )[ 1 ] );\n\t\tlineWidthAvailable = ( version >= 2.0 );\n\n\t}\n\n\tlet currentTextureSlot = null;\n\tlet currentBoundTextures = {};\n\n\tconst currentScissor = new Vector4();\n\tconst currentViewport = new Vector4();\n\n\tfunction createTexture( type, target, count ) {\n\n\t\tconst data = new Uint8Array( 4 ); // 4 is required to match default unpack alignment of 4.\n\t\tconst texture = gl.createTexture();\n\n\t\tgl.bindTexture( type, texture );\n\t\tgl.texParameteri( type, 10241, 9728 );\n\t\tgl.texParameteri( type, 10240, 9728 );\n\n\t\tfor ( let i = 0; i < count; i ++ ) {\n\n\t\t\tgl.texImage2D( target + i, 0, 6408, 1, 1, 0, 6408, 5121, data );\n\n\t\t}\n\n\t\treturn texture;\n\n\t}\n\n\tconst emptyTextures = {};\n\temptyTextures[ 3553 ] = createTexture( 3553, 3553, 1 );\n\temptyTextures[ 34067 ] = createTexture( 34067, 34069, 6 );\n\n\t// init\n\n\tcolorBuffer.setClear( 0, 0, 0, 1 );\n\tdepthBuffer.setClear( 1 );\n\tstencilBuffer.setClear( 0 );\n\n\tenable( 2929 );\n\tdepthBuffer.setFunc( LessEqualDepth );\n\n\tsetFlipSided( false );\n\tsetCullFace( CullFaceBack );\n\tenable( 2884 );\n\n\tsetBlending( NoBlending );\n\n\t//\n\n\tfunction enable( id ) {\n\n\t\tif ( enabledCapabilities[ id ] !== true ) {\n\n\t\t\tgl.enable( id );\n\t\t\tenabledCapabilities[ id ] = true;\n\n\t\t}\n\n\t}\n\n\tfunction disable( id ) {\n\n\t\tif ( enabledCapabilities[ id ] !== false ) {\n\n\t\t\tgl.disable( id );\n\t\t\tenabledCapabilities[ id ] = false;\n\n\t\t}\n\n\t}\n\n\tfunction useProgram( program ) {\n\n\t\tif ( currentProgram !== program ) {\n\n\t\t\tgl.useProgram( program );\n\n\t\t\tcurrentProgram = program;\n\n\t\t\treturn true;\n\n\t\t}\n\n\t\treturn false;\n\n\t}\n\n\tconst equationToGL = {\n\t\t[ AddEquation ]: 32774,\n\t\t[ SubtractEquation ]: 32778,\n\t\t[ ReverseSubtractEquation ]: 32779\n\t};\n\n\tif ( isWebGL2 ) {\n\n\t\tequationToGL[ MinEquation ] = 32775;\n\t\tequationToGL[ MaxEquation ] = 32776;\n\n\t} else {\n\n\t\tconst extension = extensions.get( 'EXT_blend_minmax' );\n\n\t\tif ( extension !== null ) {\n\n\t\t\tequationToGL[ MinEquation ] = extension.MIN_EXT;\n\t\t\tequationToGL[ MaxEquation ] = extension.MAX_EXT;\n\n\t\t}\n\n\t}\n\n\tconst factorToGL = {\n\t\t[ ZeroFactor ]: 0,\n\t\t[ OneFactor ]: 1,\n\t\t[ SrcColorFactor ]: 768,\n\t\t[ SrcAlphaFactor ]: 770,\n\t\t[ SrcAlphaSaturateFactor ]: 776,\n\t\t[ DstColorFactor ]: 774,\n\t\t[ DstAlphaFactor ]: 772,\n\t\t[ OneMinusSrcColorFactor ]: 769,\n\t\t[ OneMinusSrcAlphaFactor ]: 771,\n\t\t[ OneMinusDstColorFactor ]: 775,\n\t\t[ OneMinusDstAlphaFactor ]: 773\n\t};\n\n\tfunction setBlending( blending, blendEquation, blendSrc, blendDst, blendEquationAlpha, blendSrcAlpha, blendDstAlpha, premultipliedAlpha ) {\n\n\t\tif ( blending === NoBlending ) {\n\n\t\t\tif ( currentBlendingEnabled ) {\n\n\t\t\t\tdisable( 3042 );\n\t\t\t\tcurrentBlendingEnabled = false;\n\n\t\t\t}\n\n\t\t\treturn;\n\n\t\t}\n\n\t\tif ( ! currentBlendingEnabled ) {\n\n\t\t\tenable( 3042 );\n\t\t\tcurrentBlendingEnabled = true;\n\n\t\t}\n\n\t\tif ( blending !== CustomBlending ) {\n\n\t\t\tif ( blending !== currentBlending || premultipliedAlpha !== currentPremultipledAlpha ) {\n\n\t\t\t\tif ( currentBlendEquation !== AddEquation || currentBlendEquationAlpha !== AddEquation ) {\n\n\t\t\t\t\tgl.blendEquation( 32774 );\n\n\t\t\t\t\tcurrentBlendEquation = AddEquation;\n\t\t\t\t\tcurrentBlendEquationAlpha = AddEquation;\n\n\t\t\t\t}\n\n\t\t\t\tif ( premultipliedAlpha ) {\n\n\t\t\t\t\tswitch ( blending ) {\n\n\t\t\t\t\t\tcase NormalBlending:\n\t\t\t\t\t\t\tgl.blendFuncSeparate( 1, 771, 1, 771 );\n\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\tcase AdditiveBlending:\n\t\t\t\t\t\t\tgl.blendFunc( 1, 1 );\n\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\tcase SubtractiveBlending:\n\t\t\t\t\t\t\tgl.blendFuncSeparate( 0, 0, 769, 771 );\n\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\tcase MultiplyBlending:\n\t\t\t\t\t\t\tgl.blendFuncSeparate( 0, 768, 0, 770 );\n\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\tdefault:\n\t\t\t\t\t\t\tconsole.error( 'THREE.WebGLState: Invalid blending: ', blending );\n\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t}\n\n\t\t\t\t} else {\n\n\t\t\t\t\tswitch ( blending ) {\n\n\t\t\t\t\t\tcase NormalBlending:\n\t\t\t\t\t\t\tgl.blendFuncSeparate( 770, 771, 1, 771 );\n\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\tcase AdditiveBlending:\n\t\t\t\t\t\t\tgl.blendFunc( 770, 1 );\n\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\tcase SubtractiveBlending:\n\t\t\t\t\t\t\tgl.blendFunc( 0, 769 );\n\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\tcase MultiplyBlending:\n\t\t\t\t\t\t\tgl.blendFunc( 0, 768 );\n\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\tdefault:\n\t\t\t\t\t\t\tconsole.error( 'THREE.WebGLState: Invalid blending: ', blending );\n\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\tcurrentBlendSrc = null;\n\t\t\t\tcurrentBlendDst = null;\n\t\t\t\tcurrentBlendSrcAlpha = null;\n\t\t\t\tcurrentBlendDstAlpha = null;\n\n\t\t\t\tcurrentBlending = blending;\n\t\t\t\tcurrentPremultipledAlpha = premultipliedAlpha;\n\n\t\t\t}\n\n\t\t\treturn;\n\n\t\t}\n\n\t\t// custom blending\n\n\t\tblendEquationAlpha = blendEquationAlpha || blendEquation;\n\t\tblendSrcAlpha = blendSrcAlpha || blendSrc;\n\t\tblendDstAlpha = blendDstAlpha || blendDst;\n\n\t\tif ( blendEquation !== currentBlendEquation || blendEquationAlpha !== currentBlendEquationAlpha ) {\n\n\t\t\tgl.blendEquationSeparate( equationToGL[ blendEquation ], equationToGL[ blendEquationAlpha ] );\n\n\t\t\tcurrentBlendEquation = blendEquation;\n\t\t\tcurrentBlendEquationAlpha = blendEquationAlpha;\n\n\t\t}\n\n\t\tif ( blendSrc !== currentBlendSrc || blendDst !== currentBlendDst || blendSrcAlpha !== currentBlendSrcAlpha || blendDstAlpha !== currentBlendDstAlpha ) {\n\n\t\t\tgl.blendFuncSeparate( factorToGL[ blendSrc ], factorToGL[ blendDst ], factorToGL[ blendSrcAlpha ], factorToGL[ blendDstAlpha ] );\n\n\t\t\tcurrentBlendSrc = blendSrc;\n\t\t\tcurrentBlendDst = blendDst;\n\t\t\tcurrentBlendSrcAlpha = blendSrcAlpha;\n\t\t\tcurrentBlendDstAlpha = blendDstAlpha;\n\n\t\t}\n\n\t\tcurrentBlending = blending;\n\t\tcurrentPremultipledAlpha = null;\n\n\t}\n\n\tfunction setMaterial( material, frontFaceCW ) {\n\n\t\tmaterial.side === DoubleSide\n\t\t\t? disable( 2884 )\n\t\t\t: enable( 2884 );\n\n\t\tlet flipSided = ( material.side === BackSide );\n\t\tif ( frontFaceCW ) flipSided = ! flipSided;\n\n\t\tsetFlipSided( flipSided );\n\n\t\t( material.blending === NormalBlending && material.transparent === false )\n\t\t\t? setBlending( NoBlending )\n\t\t\t: setBlending( material.blending, material.blendEquation, material.blendSrc, material.blendDst, material.blendEquationAlpha, material.blendSrcAlpha, material.blendDstAlpha, material.premultipliedAlpha );\n\n\t\tdepthBuffer.setFunc( material.depthFunc );\n\t\tdepthBuffer.setTest( material.depthTest );\n\t\tdepthBuffer.setMask( material.depthWrite );\n\t\tcolorBuffer.setMask( material.colorWrite );\n\n\t\tconst stencilWrite = material.stencilWrite;\n\t\tstencilBuffer.setTest( stencilWrite );\n\t\tif ( stencilWrite ) {\n\n\t\t\tstencilBuffer.setMask( material.stencilWriteMask );\n\t\t\tstencilBuffer.setFunc( material.stencilFunc, material.stencilRef, material.stencilFuncMask );\n\t\t\tstencilBuffer.setOp( material.stencilFail, material.stencilZFail, material.stencilZPass );\n\n\t\t}\n\n\t\tsetPolygonOffset( material.polygonOffset, material.polygonOffsetFactor, material.polygonOffsetUnits );\n\n\t}\n\n\t//\n\n\tfunction setFlipSided( flipSided ) {\n\n\t\tif ( currentFlipSided !== flipSided ) {\n\n\t\t\tif ( flipSided ) {\n\n\t\t\t\tgl.frontFace( 2304 );\n\n\t\t\t} else {\n\n\t\t\t\tgl.frontFace( 2305 );\n\n\t\t\t}\n\n\t\t\tcurrentFlipSided = flipSided;\n\n\t\t}\n\n\t}\n\n\tfunction setCullFace( cullFace ) {\n\n\t\tif ( cullFace !== CullFaceNone ) {\n\n\t\t\tenable( 2884 );\n\n\t\t\tif ( cullFace !== currentCullFace ) {\n\n\t\t\t\tif ( cullFace === CullFaceBack ) {\n\n\t\t\t\t\tgl.cullFace( 1029 );\n\n\t\t\t\t} else if ( cullFace === CullFaceFront ) {\n\n\t\t\t\t\tgl.cullFace( 1028 );\n\n\t\t\t\t} else {\n\n\t\t\t\t\tgl.cullFace( 1032 );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\tdisable( 2884 );\n\n\t\t}\n\n\t\tcurrentCullFace = cullFace;\n\n\t}\n\n\tfunction setLineWidth( width ) {\n\n\t\tif ( width !== currentLineWidth ) {\n\n\t\t\tif ( lineWidthAvailable ) gl.lineWidth( width );\n\n\t\t\tcurrentLineWidth = width;\n\n\t\t}\n\n\t}\n\n\tfunction setPolygonOffset( polygonOffset, factor, units ) {\n\n\t\tif ( polygonOffset ) {\n\n\t\t\tenable( 32823 );\n\n\t\t\tif ( currentPolygonOffsetFactor !== factor || currentPolygonOffsetUnits !== units ) {\n\n\t\t\t\tgl.polygonOffset( factor, units );\n\n\t\t\t\tcurrentPolygonOffsetFactor = factor;\n\t\t\t\tcurrentPolygonOffsetUnits = units;\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\tdisable( 32823 );\n\n\t\t}\n\n\t}\n\n\tfunction setScissorTest( scissorTest ) {\n\n\t\tif ( scissorTest ) {\n\n\t\t\tenable( 3089 );\n\n\t\t} else {\n\n\t\t\tdisable( 3089 );\n\n\t\t}\n\n\t}\n\n\t// texture\n\n\tfunction activeTexture( webglSlot ) {\n\n\t\tif ( webglSlot === undefined ) webglSlot = 33984 + maxTextures - 1;\n\n\t\tif ( currentTextureSlot !== webglSlot ) {\n\n\t\t\tgl.activeTexture( webglSlot );\n\t\t\tcurrentTextureSlot = webglSlot;\n\n\t\t}\n\n\t}\n\n\tfunction bindTexture( webglType, webglTexture ) {\n\n\t\tif ( currentTextureSlot === null ) {\n\n\t\t\tactiveTexture();\n\n\t\t}\n\n\t\tlet boundTexture = currentBoundTextures[ currentTextureSlot ];\n\n\t\tif ( boundTexture === undefined ) {\n\n\t\t\tboundTexture = { type: undefined, texture: undefined };\n\t\t\tcurrentBoundTextures[ currentTextureSlot ] = boundTexture;\n\n\t\t}\n\n\t\tif ( boundTexture.type !== webglType || boundTexture.texture !== webglTexture ) {\n\n\t\t\tgl.bindTexture( webglType, webglTexture || emptyTextures[ webglType ] );\n\n\t\t\tboundTexture.type = webglType;\n\t\t\tboundTexture.texture = webglTexture;\n\n\t\t}\n\n\t}\n\n\tfunction unbindTexture() {\n\n\t\tconst boundTexture = currentBoundTextures[ currentTextureSlot ];\n\n\t\tif ( boundTexture !== undefined && boundTexture.type !== undefined ) {\n\n\t\t\tgl.bindTexture( boundTexture.type, null );\n\n\t\t\tboundTexture.type = undefined;\n\t\t\tboundTexture.texture = undefined;\n\n\t\t}\n\n\t}\n\n\tfunction compressedTexImage2D() {\n\n\t\ttry {\n\n\t\t\tgl.compressedTexImage2D.apply( gl, arguments );\n\n\t\t} catch ( error ) {\n\n\t\t\tconsole.error( 'THREE.WebGLState:', error );\n\n\t\t}\n\n\t}\n\n\tfunction texImage2D() {\n\n\t\ttry {\n\n\t\t\tgl.texImage2D.apply( gl, arguments );\n\n\t\t} catch ( error ) {\n\n\t\t\tconsole.error( 'THREE.WebGLState:', error );\n\n\t\t}\n\n\t}\n\n\tfunction texImage3D() {\n\n\t\ttry {\n\n\t\t\tgl.texImage3D.apply( gl, arguments );\n\n\t\t} catch ( error ) {\n\n\t\t\tconsole.error( 'THREE.WebGLState:', error );\n\n\t\t}\n\n\t}\n\n\t//\n\n\tfunction scissor( scissor ) {\n\n\t\tif ( currentScissor.equals( scissor ) === false ) {\n\n\t\t\tgl.scissor( scissor.x, scissor.y, scissor.z, scissor.w );\n\t\t\tcurrentScissor.copy( scissor );\n\n\t\t}\n\n\t}\n\n\tfunction viewport( viewport ) {\n\n\t\tif ( currentViewport.equals( viewport ) === false ) {\n\n\t\t\tgl.viewport( viewport.x, viewport.y, viewport.z, viewport.w );\n\t\t\tcurrentViewport.copy( viewport );\n\n\t\t}\n\n\t}\n\n\t//\n\n\tfunction reset() {\n\n\t\tenabledCapabilities = {};\n\n\t\tcurrentTextureSlot = null;\n\t\tcurrentBoundTextures = {};\n\n\t\tcurrentProgram = null;\n\n\t\tcurrentBlendingEnabled = null;\n\t\tcurrentBlending = null;\n\t\tcurrentBlendEquation = null;\n\t\tcurrentBlendSrc = null;\n\t\tcurrentBlendDst = null;\n\t\tcurrentBlendEquationAlpha = null;\n\t\tcurrentBlendSrcAlpha = null;\n\t\tcurrentBlendDstAlpha = null;\n\t\tcurrentPremultipledAlpha = false;\n\n\t\tcurrentFlipSided = null;\n\t\tcurrentCullFace = null;\n\n\t\tcurrentLineWidth = null;\n\n\t\tcurrentPolygonOffsetFactor = null;\n\t\tcurrentPolygonOffsetUnits = null;\n\n\t\tcolorBuffer.reset();\n\t\tdepthBuffer.reset();\n\t\tstencilBuffer.reset();\n\n\t}\n\n\treturn {\n\n\t\tbuffers: {\n\t\t\tcolor: colorBuffer,\n\t\t\tdepth: depthBuffer,\n\t\t\tstencil: stencilBuffer\n\t\t},\n\n\t\tenable: enable,\n\t\tdisable: disable,\n\n\t\tuseProgram: useProgram,\n\n\t\tsetBlending: setBlending,\n\t\tsetMaterial: setMaterial,\n\n\t\tsetFlipSided: setFlipSided,\n\t\tsetCullFace: setCullFace,\n\n\t\tsetLineWidth: setLineWidth,\n\t\tsetPolygonOffset: setPolygonOffset,\n\n\t\tsetScissorTest: setScissorTest,\n\n\t\tactiveTexture: activeTexture,\n\t\tbindTexture: bindTexture,\n\t\tunbindTexture: unbindTexture,\n\t\tcompressedTexImage2D: compressedTexImage2D,\n\t\ttexImage2D: texImage2D,\n\t\ttexImage3D: texImage3D,\n\n\t\tscissor: scissor,\n\t\tviewport: viewport,\n\n\t\treset: reset\n\n\t};\n\n}\n\nfunction WebGLTextures( _gl, extensions, state, properties, capabilities, utils, info ) {\n\n\tconst isWebGL2 = capabilities.isWebGL2;\n\tconst maxTextures = capabilities.maxTextures;\n\tconst maxCubemapSize = capabilities.maxCubemapSize;\n\tconst maxTextureSize = capabilities.maxTextureSize;\n\tconst maxSamples = capabilities.maxSamples;\n\n\tconst _videoTextures = new WeakMap();\n\tlet _canvas;\n\n\t// cordova iOS (as of 5.0) still uses UIWebView, which provides OffscreenCanvas,\n\t// also OffscreenCanvas.getContext(\"webgl\"), but not OffscreenCanvas.getContext(\"2d\")!\n\t// Some implementations may only implement OffscreenCanvas partially (e.g. lacking 2d).\n\n\tlet useOffscreenCanvas = false;\n\n\ttry {\n\n\t\tuseOffscreenCanvas = typeof OffscreenCanvas !== 'undefined'\n\t\t\t&& ( new OffscreenCanvas( 1, 1 ).getContext( '2d' ) ) !== null;\n\n\t} catch ( err ) {\n\n\t\t// Ignore any errors\n\n\t}\n\n\tfunction createCanvas( width, height ) {\n\n\t\t// Use OffscreenCanvas when available. Specially needed in web workers\n\n\t\treturn useOffscreenCanvas ?\n\t\t\tnew OffscreenCanvas( width, height ) :\n\t\t\tdocument.createElementNS( 'http://www.w3.org/1999/xhtml', 'canvas' );\n\n\t}\n\n\tfunction resizeImage( image, needsPowerOfTwo, needsNewCanvas, maxSize ) {\n\n\t\tlet scale = 1;\n\n\t\t// handle case if texture exceeds max size\n\n\t\tif ( image.width > maxSize || image.height > maxSize ) {\n\n\t\t\tscale = maxSize / Math.max( image.width, image.height );\n\n\t\t}\n\n\t\t// only perform resize if necessary\n\n\t\tif ( scale < 1 || needsPowerOfTwo === true ) {\n\n\t\t\t// only perform resize for certain image types\n\n\t\t\tif ( ( typeof HTMLImageElement !== 'undefined' && image instanceof HTMLImageElement ) ||\n\t\t\t\t( typeof HTMLCanvasElement !== 'undefined' && image instanceof HTMLCanvasElement ) ||\n\t\t\t\t( typeof ImageBitmap !== 'undefined' && image instanceof ImageBitmap ) ) {\n\n\t\t\t\tconst floor = needsPowerOfTwo ? MathUtils.floorPowerOfTwo : Math.floor;\n\n\t\t\t\tconst width = floor( scale * image.width );\n\t\t\t\tconst height = floor( scale * image.height );\n\n\t\t\t\tif ( _canvas === undefined ) _canvas = createCanvas( width, height );\n\n\t\t\t\t// cube textures can't reuse the same canvas\n\n\t\t\t\tconst canvas = needsNewCanvas ? createCanvas( width, height ) : _canvas;\n\n\t\t\t\tcanvas.width = width;\n\t\t\t\tcanvas.height = height;\n\n\t\t\t\tconst context = canvas.getContext( '2d' );\n\t\t\t\tcontext.drawImage( image, 0, 0, width, height );\n\n\t\t\t\tconsole.warn( 'THREE.WebGLRenderer: Texture has been resized from (' + image.width + 'x' + image.height + ') to (' + width + 'x' + height + ').' );\n\n\t\t\t\treturn canvas;\n\n\t\t\t} else {\n\n\t\t\t\tif ( 'data' in image ) {\n\n\t\t\t\t\tconsole.warn( 'THREE.WebGLRenderer: Image in DataTexture is too big (' + image.width + 'x' + image.height + ').' );\n\n\t\t\t\t}\n\n\t\t\t\treturn image;\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn image;\n\n\t}\n\n\tfunction isPowerOfTwo( image ) {\n\n\t\treturn MathUtils.isPowerOfTwo( image.width ) && MathUtils.isPowerOfTwo( image.height );\n\n\t}\n\n\tfunction textureNeedsPowerOfTwo( texture ) {\n\n\t\tif ( isWebGL2 ) return false;\n\n\t\treturn ( texture.wrapS !== ClampToEdgeWrapping || texture.wrapT !== ClampToEdgeWrapping ) ||\n\t\t\t( texture.minFilter !== NearestFilter && texture.minFilter !== LinearFilter );\n\n\t}\n\n\tfunction textureNeedsGenerateMipmaps( texture, supportsMips ) {\n\n\t\treturn texture.generateMipmaps && supportsMips &&\n\t\t\ttexture.minFilter !== NearestFilter && texture.minFilter !== LinearFilter;\n\n\t}\n\n\tfunction generateMipmap( target, texture, width, height ) {\n\n\t\t_gl.generateMipmap( target );\n\n\t\tconst textureProperties = properties.get( texture );\n\n\t\t// Note: Math.log( x ) * Math.LOG2E used instead of Math.log2( x ) which is not supported by IE11\n\t\ttextureProperties.__maxMipLevel = Math.log( Math.max( width, height ) ) * Math.LOG2E;\n\n\t}\n\n\tfunction getInternalFormat( internalFormatName, glFormat, glType ) {\n\n\t\tif ( isWebGL2 === false ) return glFormat;\n\n\t\tif ( internalFormatName !== null ) {\n\n\t\t\tif ( _gl[ internalFormatName ] !== undefined ) return _gl[ internalFormatName ];\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: Attempt to use non-existing WebGL internal format \\'' + internalFormatName + '\\'' );\n\n\t\t}\n\n\t\tlet internalFormat = glFormat;\n\n\t\tif ( glFormat === 6403 ) {\n\n\t\t\tif ( glType === 5126 ) internalFormat = 33326;\n\t\t\tif ( glType === 5131 ) internalFormat = 33325;\n\t\t\tif ( glType === 5121 ) internalFormat = 33321;\n\n\t\t}\n\n\t\tif ( glFormat === 6407 ) {\n\n\t\t\tif ( glType === 5126 ) internalFormat = 34837;\n\t\t\tif ( glType === 5131 ) internalFormat = 34843;\n\t\t\tif ( glType === 5121 ) internalFormat = 32849;\n\n\t\t}\n\n\t\tif ( glFormat === 6408 ) {\n\n\t\t\tif ( glType === 5126 ) internalFormat = 34836;\n\t\t\tif ( glType === 5131 ) internalFormat = 34842;\n\t\t\tif ( glType === 5121 ) internalFormat = 32856;\n\n\t\t}\n\n\t\tif ( internalFormat === 33325 || internalFormat === 33326 ||\n\t\t\tinternalFormat === 34842 || internalFormat === 34836 ) {\n\n\t\t\textensions.get( 'EXT_color_buffer_float' );\n\n\t\t}\n\n\t\treturn internalFormat;\n\n\t}\n\n\t// Fallback filters for non-power-of-2 textures\n\n\tfunction filterFallback( f ) {\n\n\t\tif ( f === NearestFilter || f === NearestMipmapNearestFilter || f === NearestMipmapLinearFilter ) {\n\n\t\t\treturn 9728;\n\n\t\t}\n\n\t\treturn 9729;\n\n\t}\n\n\t//\n\n\tfunction onTextureDispose( event ) {\n\n\t\tconst texture = event.target;\n\n\t\ttexture.removeEventListener( 'dispose', onTextureDispose );\n\n\t\tdeallocateTexture( texture );\n\n\t\tif ( texture.isVideoTexture ) {\n\n\t\t\t_videoTextures.delete( texture );\n\n\t\t}\n\n\t\tinfo.memory.textures --;\n\n\t}\n\n\tfunction onRenderTargetDispose( event ) {\n\n\t\tconst renderTarget = event.target;\n\n\t\trenderTarget.removeEventListener( 'dispose', onRenderTargetDispose );\n\n\t\tdeallocateRenderTarget( renderTarget );\n\n\t\tinfo.memory.textures --;\n\n\t}\n\n\t//\n\n\tfunction deallocateTexture( texture ) {\n\n\t\tconst textureProperties = properties.get( texture );\n\n\t\tif ( textureProperties.__webglInit === undefined ) return;\n\n\t\t_gl.deleteTexture( textureProperties.__webglTexture );\n\n\t\tproperties.remove( texture );\n\n\t}\n\n\tfunction deallocateRenderTarget( renderTarget ) {\n\n\t\tconst renderTargetProperties = properties.get( renderTarget );\n\t\tconst textureProperties = properties.get( renderTarget.texture );\n\n\t\tif ( ! renderTarget ) return;\n\n\t\tif ( textureProperties.__webglTexture !== undefined ) {\n\n\t\t\t_gl.deleteTexture( textureProperties.__webglTexture );\n\n\t\t}\n\n\t\tif ( renderTarget.depthTexture ) {\n\n\t\t\trenderTarget.depthTexture.dispose();\n\n\t\t}\n\n\t\tif ( renderTarget.isWebGLCubeRenderTarget ) {\n\n\t\t\tfor ( let i = 0; i < 6; i ++ ) {\n\n\t\t\t\t_gl.deleteFramebuffer( renderTargetProperties.__webglFramebuffer[ i ] );\n\t\t\t\tif ( renderTargetProperties.__webglDepthbuffer ) _gl.deleteRenderbuffer( renderTargetProperties.__webglDepthbuffer[ i ] );\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\t_gl.deleteFramebuffer( renderTargetProperties.__webglFramebuffer );\n\t\t\tif ( renderTargetProperties.__webglDepthbuffer ) _gl.deleteRenderbuffer( renderTargetProperties.__webglDepthbuffer );\n\t\t\tif ( renderTargetProperties.__webglMultisampledFramebuffer ) _gl.deleteFramebuffer( renderTargetProperties.__webglMultisampledFramebuffer );\n\t\t\tif ( renderTargetProperties.__webglColorRenderbuffer ) _gl.deleteRenderbuffer( renderTargetProperties.__webglColorRenderbuffer );\n\t\t\tif ( renderTargetProperties.__webglDepthRenderbuffer ) _gl.deleteRenderbuffer( renderTargetProperties.__webglDepthRenderbuffer );\n\n\t\t}\n\n\t\tproperties.remove( renderTarget.texture );\n\t\tproperties.remove( renderTarget );\n\n\t}\n\n\t//\n\n\tlet textureUnits = 0;\n\n\tfunction resetTextureUnits() {\n\n\t\ttextureUnits = 0;\n\n\t}\n\n\tfunction allocateTextureUnit() {\n\n\t\tconst textureUnit = textureUnits;\n\n\t\tif ( textureUnit >= maxTextures ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLTextures: Trying to use ' + textureUnit + ' texture units while this GPU supports only ' + maxTextures );\n\n\t\t}\n\n\t\ttextureUnits += 1;\n\n\t\treturn textureUnit;\n\n\t}\n\n\t//\n\n\tfunction setTexture2D( texture, slot ) {\n\n\t\tconst textureProperties = properties.get( texture );\n\n\t\tif ( texture.isVideoTexture ) updateVideoTexture( texture );\n\n\t\tif ( texture.version > 0 && textureProperties.__version !== texture.version ) {\n\n\t\t\tconst image = texture.image;\n\n\t\t\tif ( image === undefined ) {\n\n\t\t\t\tconsole.warn( 'THREE.WebGLRenderer: Texture marked for update but image is undefined' );\n\n\t\t\t} else if ( image.complete === false ) {\n\n\t\t\t\tconsole.warn( 'THREE.WebGLRenderer: Texture marked for update but image is incomplete' );\n\n\t\t\t} else {\n\n\t\t\t\tuploadTexture( textureProperties, texture, slot );\n\t\t\t\treturn;\n\n\t\t\t}\n\n\t\t}\n\n\t\tstate.activeTexture( 33984 + slot );\n\t\tstate.bindTexture( 3553, textureProperties.__webglTexture );\n\n\t}\n\n\tfunction setTexture2DArray( texture, slot ) {\n\n\t\tconst textureProperties = properties.get( texture );\n\n\t\tif ( texture.version > 0 && textureProperties.__version !== texture.version ) {\n\n\t\t\tuploadTexture( textureProperties, texture, slot );\n\t\t\treturn;\n\n\t\t}\n\n\t\tstate.activeTexture( 33984 + slot );\n\t\tstate.bindTexture( 35866, textureProperties.__webglTexture );\n\n\t}\n\n\tfunction setTexture3D( texture, slot ) {\n\n\t\tconst textureProperties = properties.get( texture );\n\n\t\tif ( texture.version > 0 && textureProperties.__version !== texture.version ) {\n\n\t\t\tuploadTexture( textureProperties, texture, slot );\n\t\t\treturn;\n\n\t\t}\n\n\t\tstate.activeTexture( 33984 + slot );\n\t\tstate.bindTexture( 32879, textureProperties.__webglTexture );\n\n\t}\n\n\tfunction setTextureCube( texture, slot ) {\n\n\t\tconst textureProperties = properties.get( texture );\n\n\t\tif ( texture.version > 0 && textureProperties.__version !== texture.version ) {\n\n\t\t\tuploadCubeTexture( textureProperties, texture, slot );\n\t\t\treturn;\n\n\t\t}\n\n\t\tstate.activeTexture( 33984 + slot );\n\t\tstate.bindTexture( 34067, textureProperties.__webglTexture );\n\n\t}\n\n\tconst wrappingToGL = {\n\t\t[ RepeatWrapping ]: 10497,\n\t\t[ ClampToEdgeWrapping ]: 33071,\n\t\t[ MirroredRepeatWrapping ]: 33648\n\t};\n\n\tconst filterToGL = {\n\t\t[ NearestFilter ]: 9728,\n\t\t[ NearestMipmapNearestFilter ]: 9984,\n\t\t[ NearestMipmapLinearFilter ]: 9986,\n\n\t\t[ LinearFilter ]: 9729,\n\t\t[ LinearMipmapNearestFilter ]: 9985,\n\t\t[ LinearMipmapLinearFilter ]: 9987\n\t};\n\n\tfunction setTextureParameters( textureType, texture, supportsMips ) {\n\n\t\tif ( supportsMips ) {\n\n\t\t\t_gl.texParameteri( textureType, 10242, wrappingToGL[ texture.wrapS ] );\n\t\t\t_gl.texParameteri( textureType, 10243, wrappingToGL[ texture.wrapT ] );\n\n\t\t\tif ( textureType === 32879 || textureType === 35866 ) {\n\n\t\t\t\t_gl.texParameteri( textureType, 32882, wrappingToGL[ texture.wrapR ] );\n\n\t\t\t}\n\n\t\t\t_gl.texParameteri( textureType, 10240, filterToGL[ texture.magFilter ] );\n\t\t\t_gl.texParameteri( textureType, 10241, filterToGL[ texture.minFilter ] );\n\n\t\t} else {\n\n\t\t\t_gl.texParameteri( textureType, 10242, 33071 );\n\t\t\t_gl.texParameteri( textureType, 10243, 33071 );\n\n\t\t\tif ( textureType === 32879 || textureType === 35866 ) {\n\n\t\t\t\t_gl.texParameteri( textureType, 32882, 33071 );\n\n\t\t\t}\n\n\t\t\tif ( texture.wrapS !== ClampToEdgeWrapping || texture.wrapT !== ClampToEdgeWrapping ) {\n\n\t\t\t\tconsole.warn( 'THREE.WebGLRenderer: Texture is not power of two. Texture.wrapS and Texture.wrapT should be set to THREE.ClampToEdgeWrapping.' );\n\n\t\t\t}\n\n\t\t\t_gl.texParameteri( textureType, 10240, filterFallback( texture.magFilter ) );\n\t\t\t_gl.texParameteri( textureType, 10241, filterFallback( texture.minFilter ) );\n\n\t\t\tif ( texture.minFilter !== NearestFilter && texture.minFilter !== LinearFilter ) {\n\n\t\t\t\tconsole.warn( 'THREE.WebGLRenderer: Texture is not power of two. Texture.minFilter should be set to THREE.NearestFilter or THREE.LinearFilter.' );\n\n\t\t\t}\n\n\t\t}\n\n\t\tconst extension = extensions.get( 'EXT_texture_filter_anisotropic' );\n\n\t\tif ( extension ) {\n\n\t\t\tif ( texture.type === FloatType && extensions.get( 'OES_texture_float_linear' ) === null ) return;\n\t\t\tif ( texture.type === HalfFloatType && ( isWebGL2 || extensions.get( 'OES_texture_half_float_linear' ) ) === null ) return;\n\n\t\t\tif ( texture.anisotropy > 1 || properties.get( texture ).__currentAnisotropy ) {\n\n\t\t\t\t_gl.texParameterf( textureType, extension.TEXTURE_MAX_ANISOTROPY_EXT, Math.min( texture.anisotropy, capabilities.getMaxAnisotropy() ) );\n\t\t\t\tproperties.get( texture ).__currentAnisotropy = texture.anisotropy;\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\tfunction initTexture( textureProperties, texture ) {\n\n\t\tif ( textureProperties.__webglInit === undefined ) {\n\n\t\t\ttextureProperties.__webglInit = true;\n\n\t\t\ttexture.addEventListener( 'dispose', onTextureDispose );\n\n\t\t\ttextureProperties.__webglTexture = _gl.createTexture();\n\n\t\t\tinfo.memory.textures ++;\n\n\t\t}\n\n\t}\n\n\tfunction uploadTexture( textureProperties, texture, slot ) {\n\n\t\tlet textureType = 3553;\n\n\t\tif ( texture.isDataTexture2DArray ) textureType = 35866;\n\t\tif ( texture.isDataTexture3D ) textureType = 32879;\n\n\t\tinitTexture( textureProperties, texture );\n\n\t\tstate.activeTexture( 33984 + slot );\n\t\tstate.bindTexture( textureType, textureProperties.__webglTexture );\n\n\t\t_gl.pixelStorei( 37440, texture.flipY );\n\t\t_gl.pixelStorei( 37441, texture.premultiplyAlpha );\n\t\t_gl.pixelStorei( 3317, texture.unpackAlignment );\n\n\t\tconst needsPowerOfTwo = textureNeedsPowerOfTwo( texture ) && isPowerOfTwo( texture.image ) === false;\n\t\tconst image = resizeImage( texture.image, needsPowerOfTwo, false, maxTextureSize );\n\n\t\tconst supportsMips = isPowerOfTwo( image ) || isWebGL2,\n\t\t\tglFormat = utils.convert( texture.format );\n\n\t\tlet glType = utils.convert( texture.type ),\n\t\t\tglInternalFormat = getInternalFormat( texture.internalFormat, glFormat, glType );\n\n\t\tsetTextureParameters( textureType, texture, supportsMips );\n\n\t\tlet mipmap;\n\t\tconst mipmaps = texture.mipmaps;\n\n\t\tif ( texture.isDepthTexture ) {\n\n\t\t\t// populate depth texture with dummy data\n\n\t\t\tglInternalFormat = 6402;\n\n\t\t\tif ( isWebGL2 ) {\n\n\t\t\t\tif ( texture.type === FloatType ) {\n\n\t\t\t\t\tglInternalFormat = 36012;\n\n\t\t\t\t} else if ( texture.type === UnsignedIntType ) {\n\n\t\t\t\t\tglInternalFormat = 33190;\n\n\t\t\t\t} else if ( texture.type === UnsignedInt248Type ) {\n\n\t\t\t\t\tglInternalFormat = 35056;\n\n\t\t\t\t} else {\n\n\t\t\t\t\tglInternalFormat = 33189; // WebGL2 requires sized internalformat for glTexImage2D\n\n\t\t\t\t}\n\n\t\t\t} else {\n\n\t\t\t\tif ( texture.type === FloatType ) {\n\n\t\t\t\t\tconsole.error( 'WebGLRenderer: Floating point depth texture requires WebGL2.' );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\t// validation checks for WebGL 1\n\n\t\t\tif ( texture.format === DepthFormat && glInternalFormat === 6402 ) {\n\n\t\t\t\t// The error INVALID_OPERATION is generated by texImage2D if format and internalformat are\n\t\t\t\t// DEPTH_COMPONENT and type is not UNSIGNED_SHORT or UNSIGNED_INT\n\t\t\t\t// (https://www.khronos.org/registry/webgl/extensions/WEBGL_depth_texture/)\n\t\t\t\tif ( texture.type !== UnsignedShortType && texture.type !== UnsignedIntType ) {\n\n\t\t\t\t\tconsole.warn( 'THREE.WebGLRenderer: Use UnsignedShortType or UnsignedIntType for DepthFormat DepthTexture.' );\n\n\t\t\t\t\ttexture.type = UnsignedShortType;\n\t\t\t\t\tglType = utils.convert( texture.type );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tif ( texture.format === DepthStencilFormat && glInternalFormat === 6402 ) {\n\n\t\t\t\t// Depth stencil textures need the DEPTH_STENCIL internal format\n\t\t\t\t// (https://www.khronos.org/registry/webgl/extensions/WEBGL_depth_texture/)\n\t\t\t\tglInternalFormat = 34041;\n\n\t\t\t\t// The error INVALID_OPERATION is generated by texImage2D if format and internalformat are\n\t\t\t\t// DEPTH_STENCIL and type is not UNSIGNED_INT_24_8_WEBGL.\n\t\t\t\t// (https://www.khronos.org/registry/webgl/extensions/WEBGL_depth_texture/)\n\t\t\t\tif ( texture.type !== UnsignedInt248Type ) {\n\n\t\t\t\t\tconsole.warn( 'THREE.WebGLRenderer: Use UnsignedInt248Type for DepthStencilFormat DepthTexture.' );\n\n\t\t\t\t\ttexture.type = UnsignedInt248Type;\n\t\t\t\t\tglType = utils.convert( texture.type );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\t//\n\n\t\t\tstate.texImage2D( 3553, 0, glInternalFormat, image.width, image.height, 0, glFormat, glType, null );\n\n\t\t} else if ( texture.isDataTexture ) {\n\n\t\t\t// use manually created mipmaps if available\n\t\t\t// if there are no manual mipmaps\n\t\t\t// set 0 level mipmap and then use GL to generate other mipmap levels\n\n\t\t\tif ( mipmaps.length > 0 && supportsMips ) {\n\n\t\t\t\tfor ( let i = 0, il = mipmaps.length; i < il; i ++ ) {\n\n\t\t\t\t\tmipmap = mipmaps[ i ];\n\t\t\t\t\tstate.texImage2D( 3553, i, glInternalFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data );\n\n\t\t\t\t}\n\n\t\t\t\ttexture.generateMipmaps = false;\n\t\t\t\ttextureProperties.__maxMipLevel = mipmaps.length - 1;\n\n\t\t\t} else {\n\n\t\t\t\tstate.texImage2D( 3553, 0, glInternalFormat, image.width, image.height, 0, glFormat, glType, image.data );\n\t\t\t\ttextureProperties.__maxMipLevel = 0;\n\n\t\t\t}\n\n\t\t} else if ( texture.isCompressedTexture ) {\n\n\t\t\tfor ( let i = 0, il = mipmaps.length; i < il; i ++ ) {\n\n\t\t\t\tmipmap = mipmaps[ i ];\n\n\t\t\t\tif ( texture.format !== RGBAFormat && texture.format !== RGBFormat ) {\n\n\t\t\t\t\tif ( glFormat !== null ) {\n\n\t\t\t\t\t\tstate.compressedTexImage2D( 3553, i, glInternalFormat, mipmap.width, mipmap.height, 0, mipmap.data );\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\tconsole.warn( 'THREE.WebGLRenderer: Attempt to load unsupported compressed texture format in .uploadTexture()' );\n\n\t\t\t\t\t}\n\n\t\t\t\t} else {\n\n\t\t\t\t\tstate.texImage2D( 3553, i, glInternalFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\ttextureProperties.__maxMipLevel = mipmaps.length - 1;\n\n\t\t} else if ( texture.isDataTexture2DArray ) {\n\n\t\t\tstate.texImage3D( 35866, 0, glInternalFormat, image.width, image.height, image.depth, 0, glFormat, glType, image.data );\n\t\t\ttextureProperties.__maxMipLevel = 0;\n\n\t\t} else if ( texture.isDataTexture3D ) {\n\n\t\t\tstate.texImage3D( 32879, 0, glInternalFormat, image.width, image.height, image.depth, 0, glFormat, glType, image.data );\n\t\t\ttextureProperties.__maxMipLevel = 0;\n\n\t\t} else {\n\n\t\t\t// regular Texture (image, video, canvas)\n\n\t\t\t// use manually created mipmaps if available\n\t\t\t// if there are no manual mipmaps\n\t\t\t// set 0 level mipmap and then use GL to generate other mipmap levels\n\n\t\t\tif ( mipmaps.length > 0 && supportsMips ) {\n\n\t\t\t\tfor ( let i = 0, il = mipmaps.length; i < il; i ++ ) {\n\n\t\t\t\t\tmipmap = mipmaps[ i ];\n\t\t\t\t\tstate.texImage2D( 3553, i, glInternalFormat, glFormat, glType, mipmap );\n\n\t\t\t\t}\n\n\t\t\t\ttexture.generateMipmaps = false;\n\t\t\t\ttextureProperties.__maxMipLevel = mipmaps.length - 1;\n\n\t\t\t} else {\n\n\t\t\t\tstate.texImage2D( 3553, 0, glInternalFormat, glFormat, glType, image );\n\t\t\t\ttextureProperties.__maxMipLevel = 0;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( textureNeedsGenerateMipmaps( texture, supportsMips ) ) {\n\n\t\t\tgenerateMipmap( textureType, texture, image.width, image.height );\n\n\t\t}\n\n\t\ttextureProperties.__version = texture.version;\n\n\t\tif ( texture.onUpdate ) texture.onUpdate( texture );\n\n\t}\n\n\tfunction uploadCubeTexture( textureProperties, texture, slot ) {\n\n\t\tif ( texture.image.length !== 6 ) return;\n\n\t\tinitTexture( textureProperties, texture );\n\n\t\tstate.activeTexture( 33984 + slot );\n\t\tstate.bindTexture( 34067, textureProperties.__webglTexture );\n\n\t\t_gl.pixelStorei( 37440, texture.flipY );\n\t\t_gl.pixelStorei( 37441, texture.premultiplyAlpha );\n\t\t_gl.pixelStorei( 3317, texture.unpackAlignment );\n\n\t\tconst isCompressed = ( texture && ( texture.isCompressedTexture || texture.image[ 0 ].isCompressedTexture ) );\n\t\tconst isDataTexture = ( texture.image[ 0 ] && texture.image[ 0 ].isDataTexture );\n\n\t\tconst cubeImage = [];\n\n\t\tfor ( let i = 0; i < 6; i ++ ) {\n\n\t\t\tif ( ! isCompressed && ! isDataTexture ) {\n\n\t\t\t\tcubeImage[ i ] = resizeImage( texture.image[ i ], false, true, maxCubemapSize );\n\n\t\t\t} else {\n\n\t\t\t\tcubeImage[ i ] = isDataTexture ? texture.image[ i ].image : texture.image[ i ];\n\n\t\t\t}\n\n\t\t}\n\n\t\tconst image = cubeImage[ 0 ],\n\t\t\tsupportsMips = isPowerOfTwo( image ) || isWebGL2,\n\t\t\tglFormat = utils.convert( texture.format ),\n\t\t\tglType = utils.convert( texture.type ),\n\t\t\tglInternalFormat = getInternalFormat( texture.internalFormat, glFormat, glType );\n\n\t\tsetTextureParameters( 34067, texture, supportsMips );\n\n\t\tlet mipmaps;\n\n\t\tif ( isCompressed ) {\n\n\t\t\tfor ( let i = 0; i < 6; i ++ ) {\n\n\t\t\t\tmipmaps = cubeImage[ i ].mipmaps;\n\n\t\t\t\tfor ( let j = 0; j < mipmaps.length; j ++ ) {\n\n\t\t\t\t\tconst mipmap = mipmaps[ j ];\n\n\t\t\t\t\tif ( texture.format !== RGBAFormat && texture.format !== RGBFormat ) {\n\n\t\t\t\t\t\tif ( glFormat !== null ) {\n\n\t\t\t\t\t\t\tstate.compressedTexImage2D( 34069 + i, j, glInternalFormat, mipmap.width, mipmap.height, 0, mipmap.data );\n\n\t\t\t\t\t\t} else {\n\n\t\t\t\t\t\t\tconsole.warn( 'THREE.WebGLRenderer: Attempt to load unsupported compressed texture format in .setTextureCube()' );\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\tstate.texImage2D( 34069 + i, j, glInternalFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\ttextureProperties.__maxMipLevel = mipmaps.length - 1;\n\n\t\t} else {\n\n\t\t\tmipmaps = texture.mipmaps;\n\n\t\t\tfor ( let i = 0; i < 6; i ++ ) {\n\n\t\t\t\tif ( isDataTexture ) {\n\n\t\t\t\t\tstate.texImage2D( 34069 + i, 0, glInternalFormat, cubeImage[ i ].width, cubeImage[ i ].height, 0, glFormat, glType, cubeImage[ i ].data );\n\n\t\t\t\t\tfor ( let j = 0; j < mipmaps.length; j ++ ) {\n\n\t\t\t\t\t\tconst mipmap = mipmaps[ j ];\n\t\t\t\t\t\tconst mipmapImage = mipmap.image[ i ].image;\n\n\t\t\t\t\t\tstate.texImage2D( 34069 + i, j + 1, glInternalFormat, mipmapImage.width, mipmapImage.height, 0, glFormat, glType, mipmapImage.data );\n\n\t\t\t\t\t}\n\n\t\t\t\t} else {\n\n\t\t\t\t\tstate.texImage2D( 34069 + i, 0, glInternalFormat, glFormat, glType, cubeImage[ i ] );\n\n\t\t\t\t\tfor ( let j = 0; j < mipmaps.length; j ++ ) {\n\n\t\t\t\t\t\tconst mipmap = mipmaps[ j ];\n\n\t\t\t\t\t\tstate.texImage2D( 34069 + i, j + 1, glInternalFormat, glFormat, glType, mipmap.image[ i ] );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\ttextureProperties.__maxMipLevel = mipmaps.length;\n\n\t\t}\n\n\t\tif ( textureNeedsGenerateMipmaps( texture, supportsMips ) ) {\n\n\t\t\t// We assume images for cube map have the same size.\n\t\t\tgenerateMipmap( 34067, texture, image.width, image.height );\n\n\t\t}\n\n\t\ttextureProperties.__version = texture.version;\n\n\t\tif ( texture.onUpdate ) texture.onUpdate( texture );\n\n\t}\n\n\t// Render targets\n\n\t// Setup storage for target texture and bind it to correct framebuffer\n\tfunction setupFrameBufferTexture( framebuffer, renderTarget, attachment, textureTarget ) {\n\n\t\tconst glFormat = utils.convert( renderTarget.texture.format );\n\t\tconst glType = utils.convert( renderTarget.texture.type );\n\t\tconst glInternalFormat = getInternalFormat( renderTarget.texture.internalFormat, glFormat, glType );\n\t\tstate.texImage2D( textureTarget, 0, glInternalFormat, renderTarget.width, renderTarget.height, 0, glFormat, glType, null );\n\t\t_gl.bindFramebuffer( 36160, framebuffer );\n\t\t_gl.framebufferTexture2D( 36160, attachment, textureTarget, properties.get( renderTarget.texture ).__webglTexture, 0 );\n\t\t_gl.bindFramebuffer( 36160, null );\n\n\t}\n\n\t// Setup storage for internal depth/stencil buffers and bind to correct framebuffer\n\tfunction setupRenderBufferStorage( renderbuffer, renderTarget, isMultisample ) {\n\n\t\t_gl.bindRenderbuffer( 36161, renderbuffer );\n\n\t\tif ( renderTarget.depthBuffer && ! renderTarget.stencilBuffer ) {\n\n\t\t\tlet glInternalFormat = 33189;\n\n\t\t\tif ( isMultisample ) {\n\n\t\t\t\tconst depthTexture = renderTarget.depthTexture;\n\n\t\t\t\tif ( depthTexture && depthTexture.isDepthTexture ) {\n\n\t\t\t\t\tif ( depthTexture.type === FloatType ) {\n\n\t\t\t\t\t\tglInternalFormat = 36012;\n\n\t\t\t\t\t} else if ( depthTexture.type === UnsignedIntType ) {\n\n\t\t\t\t\t\tglInternalFormat = 33190;\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\tconst samples = getRenderTargetSamples( renderTarget );\n\n\t\t\t\t_gl.renderbufferStorageMultisample( 36161, samples, glInternalFormat, renderTarget.width, renderTarget.height );\n\n\t\t\t} else {\n\n\t\t\t\t_gl.renderbufferStorage( 36161, glInternalFormat, renderTarget.width, renderTarget.height );\n\n\t\t\t}\n\n\t\t\t_gl.framebufferRenderbuffer( 36160, 36096, 36161, renderbuffer );\n\n\t\t} else if ( renderTarget.depthBuffer && renderTarget.stencilBuffer ) {\n\n\t\t\tif ( isMultisample ) {\n\n\t\t\t\tconst samples = getRenderTargetSamples( renderTarget );\n\n\t\t\t\t_gl.renderbufferStorageMultisample( 36161, samples, 35056, renderTarget.width, renderTarget.height );\n\n\t\t\t} else {\n\n\t\t\t\t_gl.renderbufferStorage( 36161, 34041, renderTarget.width, renderTarget.height );\n\n\t\t\t}\n\n\n\t\t\t_gl.framebufferRenderbuffer( 36160, 33306, 36161, renderbuffer );\n\n\t\t} else {\n\n\t\t\tconst glFormat = utils.convert( renderTarget.texture.format );\n\t\t\tconst glType = utils.convert( renderTarget.texture.type );\n\t\t\tconst glInternalFormat = getInternalFormat( renderTarget.texture.internalFormat, glFormat, glType );\n\n\t\t\tif ( isMultisample ) {\n\n\t\t\t\tconst samples = getRenderTargetSamples( renderTarget );\n\n\t\t\t\t_gl.renderbufferStorageMultisample( 36161, samples, glInternalFormat, renderTarget.width, renderTarget.height );\n\n\t\t\t} else {\n\n\t\t\t\t_gl.renderbufferStorage( 36161, glInternalFormat, renderTarget.width, renderTarget.height );\n\n\t\t\t}\n\n\t\t}\n\n\t\t_gl.bindRenderbuffer( 36161, null );\n\n\t}\n\n\t// Setup resources for a Depth Texture for a FBO (needs an extension)\n\tfunction setupDepthTexture( framebuffer, renderTarget ) {\n\n\t\tconst isCube = ( renderTarget && renderTarget.isWebGLCubeRenderTarget );\n\t\tif ( isCube ) throw new Error( 'Depth Texture with cube render targets is not supported' );\n\n\t\t_gl.bindFramebuffer( 36160, framebuffer );\n\n\t\tif ( ! ( renderTarget.depthTexture && renderTarget.depthTexture.isDepthTexture ) ) {\n\n\t\t\tthrow new Error( 'renderTarget.depthTexture must be an instance of THREE.DepthTexture' );\n\n\t\t}\n\n\t\t// upload an empty depth texture with framebuffer size\n\t\tif ( ! properties.get( renderTarget.depthTexture ).__webglTexture ||\n\t\t\t\trenderTarget.depthTexture.image.width !== renderTarget.width ||\n\t\t\t\trenderTarget.depthTexture.image.height !== renderTarget.height ) {\n\n\t\t\trenderTarget.depthTexture.image.width = renderTarget.width;\n\t\t\trenderTarget.depthTexture.image.height = renderTarget.height;\n\t\t\trenderTarget.depthTexture.needsUpdate = true;\n\n\t\t}\n\n\t\tsetTexture2D( renderTarget.depthTexture, 0 );\n\n\t\tconst webglDepthTexture = properties.get( renderTarget.depthTexture ).__webglTexture;\n\n\t\tif ( renderTarget.depthTexture.format === DepthFormat ) {\n\n\t\t\t_gl.framebufferTexture2D( 36160, 36096, 3553, webglDepthTexture, 0 );\n\n\t\t} else if ( renderTarget.depthTexture.format === DepthStencilFormat ) {\n\n\t\t\t_gl.framebufferTexture2D( 36160, 33306, 3553, webglDepthTexture, 0 );\n\n\t\t} else {\n\n\t\t\tthrow new Error( 'Unknown depthTexture format' );\n\n\t\t}\n\n\t}\n\n\t// Setup GL resources for a non-texture depth buffer\n\tfunction setupDepthRenderbuffer( renderTarget ) {\n\n\t\tconst renderTargetProperties = properties.get( renderTarget );\n\n\t\tconst isCube = ( renderTarget.isWebGLCubeRenderTarget === true );\n\n\t\tif ( renderTarget.depthTexture ) {\n\n\t\t\tif ( isCube ) throw new Error( 'target.depthTexture not supported in Cube render targets' );\n\n\t\t\tsetupDepthTexture( renderTargetProperties.__webglFramebuffer, renderTarget );\n\n\t\t} else {\n\n\t\t\tif ( isCube ) {\n\n\t\t\t\trenderTargetProperties.__webglDepthbuffer = [];\n\n\t\t\t\tfor ( let i = 0; i < 6; i ++ ) {\n\n\t\t\t\t\t_gl.bindFramebuffer( 36160, renderTargetProperties.__webglFramebuffer[ i ] );\n\t\t\t\t\trenderTargetProperties.__webglDepthbuffer[ i ] = _gl.createRenderbuffer();\n\t\t\t\t\tsetupRenderBufferStorage( renderTargetProperties.__webglDepthbuffer[ i ], renderTarget, false );\n\n\t\t\t\t}\n\n\t\t\t} else {\n\n\t\t\t\t_gl.bindFramebuffer( 36160, renderTargetProperties.__webglFramebuffer );\n\t\t\t\trenderTargetProperties.__webglDepthbuffer = _gl.createRenderbuffer();\n\t\t\t\tsetupRenderBufferStorage( renderTargetProperties.__webglDepthbuffer, renderTarget, false );\n\n\t\t\t}\n\n\t\t}\n\n\t\t_gl.bindFramebuffer( 36160, null );\n\n\t}\n\n\t// Set up GL resources for the render target\n\tfunction setupRenderTarget( renderTarget ) {\n\n\t\tconst renderTargetProperties = properties.get( renderTarget );\n\t\tconst textureProperties = properties.get( renderTarget.texture );\n\n\t\trenderTarget.addEventListener( 'dispose', onRenderTargetDispose );\n\n\t\ttextureProperties.__webglTexture = _gl.createTexture();\n\n\t\tinfo.memory.textures ++;\n\n\t\tconst isCube = ( renderTarget.isWebGLCubeRenderTarget === true );\n\t\tconst isMultisample = ( renderTarget.isWebGLMultisampleRenderTarget === true );\n\t\tconst supportsMips = isPowerOfTwo( renderTarget ) || isWebGL2;\n\n\t\t// Handles WebGL2 RGBFormat fallback - #18858\n\n\t\tif ( isWebGL2 && renderTarget.texture.format === RGBFormat && ( renderTarget.texture.type === FloatType || renderTarget.texture.type === HalfFloatType ) ) {\n\n\t\t\trenderTarget.texture.format = RGBAFormat;\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: Rendering to textures with RGB format is not supported. Using RGBA format instead.' );\n\n\t\t}\n\n\t\t// Setup framebuffer\n\n\t\tif ( isCube ) {\n\n\t\t\trenderTargetProperties.__webglFramebuffer = [];\n\n\t\t\tfor ( let i = 0; i < 6; i ++ ) {\n\n\t\t\t\trenderTargetProperties.__webglFramebuffer[ i ] = _gl.createFramebuffer();\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\trenderTargetProperties.__webglFramebuffer = _gl.createFramebuffer();\n\n\t\t\tif ( isMultisample ) {\n\n\t\t\t\tif ( isWebGL2 ) {\n\n\t\t\t\t\trenderTargetProperties.__webglMultisampledFramebuffer = _gl.createFramebuffer();\n\t\t\t\t\trenderTargetProperties.__webglColorRenderbuffer = _gl.createRenderbuffer();\n\n\t\t\t\t\t_gl.bindRenderbuffer( 36161, renderTargetProperties.__webglColorRenderbuffer );\n\n\t\t\t\t\tconst glFormat = utils.convert( renderTarget.texture.format );\n\t\t\t\t\tconst glType = utils.convert( renderTarget.texture.type );\n\t\t\t\t\tconst glInternalFormat = getInternalFormat( renderTarget.texture.internalFormat, glFormat, glType );\n\t\t\t\t\tconst samples = getRenderTargetSamples( renderTarget );\n\t\t\t\t\t_gl.renderbufferStorageMultisample( 36161, samples, glInternalFormat, renderTarget.width, renderTarget.height );\n\n\t\t\t\t\t_gl.bindFramebuffer( 36160, renderTargetProperties.__webglMultisampledFramebuffer );\n\t\t\t\t\t_gl.framebufferRenderbuffer( 36160, 36064, 36161, renderTargetProperties.__webglColorRenderbuffer );\n\t\t\t\t\t_gl.bindRenderbuffer( 36161, null );\n\n\t\t\t\t\tif ( renderTarget.depthBuffer ) {\n\n\t\t\t\t\t\trenderTargetProperties.__webglDepthRenderbuffer = _gl.createRenderbuffer();\n\t\t\t\t\t\tsetupRenderBufferStorage( renderTargetProperties.__webglDepthRenderbuffer, renderTarget, true );\n\n\t\t\t\t\t}\n\n\t\t\t\t\t_gl.bindFramebuffer( 36160, null );\n\n\n\t\t\t\t} else {\n\n\t\t\t\t\tconsole.warn( 'THREE.WebGLRenderer: WebGLMultisampleRenderTarget can only be used with WebGL2.' );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\t// Setup color buffer\n\n\t\tif ( isCube ) {\n\n\t\t\tstate.bindTexture( 34067, textureProperties.__webglTexture );\n\t\t\tsetTextureParameters( 34067, renderTarget.texture, supportsMips );\n\n\t\t\tfor ( let i = 0; i < 6; i ++ ) {\n\n\t\t\t\tsetupFrameBufferTexture( renderTargetProperties.__webglFramebuffer[ i ], renderTarget, 36064, 34069 + i );\n\n\t\t\t}\n\n\t\t\tif ( textureNeedsGenerateMipmaps( renderTarget.texture, supportsMips ) ) {\n\n\t\t\t\tgenerateMipmap( 34067, renderTarget.texture, renderTarget.width, renderTarget.height );\n\n\t\t\t}\n\n\t\t\tstate.bindTexture( 34067, null );\n\n\t\t} else {\n\n\t\t\tstate.bindTexture( 3553, textureProperties.__webglTexture );\n\t\t\tsetTextureParameters( 3553, renderTarget.texture, supportsMips );\n\t\t\tsetupFrameBufferTexture( renderTargetProperties.__webglFramebuffer, renderTarget, 36064, 3553 );\n\n\t\t\tif ( textureNeedsGenerateMipmaps( renderTarget.texture, supportsMips ) ) {\n\n\t\t\t\tgenerateMipmap( 3553, renderTarget.texture, renderTarget.width, renderTarget.height );\n\n\t\t\t}\n\n\t\t\tstate.bindTexture( 3553, null );\n\n\t\t}\n\n\t\t// Setup depth and stencil buffers\n\n\t\tif ( renderTarget.depthBuffer ) {\n\n\t\t\tsetupDepthRenderbuffer( renderTarget );\n\n\t\t}\n\n\t}\n\n\tfunction updateRenderTargetMipmap( renderTarget ) {\n\n\t\tconst texture = renderTarget.texture;\n\t\tconst supportsMips = isPowerOfTwo( renderTarget ) || isWebGL2;\n\n\t\tif ( textureNeedsGenerateMipmaps( texture, supportsMips ) ) {\n\n\t\t\tconst target = renderTarget.isWebGLCubeRenderTarget ? 34067 : 3553;\n\t\t\tconst webglTexture = properties.get( texture ).__webglTexture;\n\n\t\t\tstate.bindTexture( target, webglTexture );\n\t\t\tgenerateMipmap( target, texture, renderTarget.width, renderTarget.height );\n\t\t\tstate.bindTexture( target, null );\n\n\t\t}\n\n\t}\n\n\tfunction updateMultisampleRenderTarget( renderTarget ) {\n\n\t\tif ( renderTarget.isWebGLMultisampleRenderTarget ) {\n\n\t\t\tif ( isWebGL2 ) {\n\n\t\t\t\tconst renderTargetProperties = properties.get( renderTarget );\n\n\t\t\t\t_gl.bindFramebuffer( 36008, renderTargetProperties.__webglMultisampledFramebuffer );\n\t\t\t\t_gl.bindFramebuffer( 36009, renderTargetProperties.__webglFramebuffer );\n\n\t\t\t\tconst width = renderTarget.width;\n\t\t\t\tconst height = renderTarget.height;\n\t\t\t\tlet mask = 16384;\n\n\t\t\t\tif ( renderTarget.depthBuffer ) mask |= 256;\n\t\t\t\tif ( renderTarget.stencilBuffer ) mask |= 1024;\n\n\t\t\t\t_gl.blitFramebuffer( 0, 0, width, height, 0, 0, width, height, mask, 9728 );\n\n\t\t\t\t_gl.bindFramebuffer( 36160, renderTargetProperties.__webglMultisampledFramebuffer ); // see #18905\n\n\t\t\t} else {\n\n\t\t\t\tconsole.warn( 'THREE.WebGLRenderer: WebGLMultisampleRenderTarget can only be used with WebGL2.' );\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\tfunction getRenderTargetSamples( renderTarget ) {\n\n\t\treturn ( isWebGL2 && renderTarget.isWebGLMultisampleRenderTarget ) ?\n\t\t\tMath.min( maxSamples, renderTarget.samples ) : 0;\n\n\t}\n\n\tfunction updateVideoTexture( texture ) {\n\n\t\tconst frame = info.render.frame;\n\n\t\t// Check the last frame we updated the VideoTexture\n\n\t\tif ( _videoTextures.get( texture ) !== frame ) {\n\n\t\t\t_videoTextures.set( texture, frame );\n\t\t\ttexture.update();\n\n\t\t}\n\n\t}\n\n\t// backwards compatibility\n\n\tlet warnedTexture2D = false;\n\tlet warnedTextureCube = false;\n\n\tfunction safeSetTexture2D( texture, slot ) {\n\n\t\tif ( texture && texture.isWebGLRenderTarget ) {\n\n\t\t\tif ( warnedTexture2D === false ) {\n\n\t\t\t\tconsole.warn( 'THREE.WebGLTextures.safeSetTexture2D: don\\'t use render targets as textures. Use their .texture property instead.' );\n\t\t\t\twarnedTexture2D = true;\n\n\t\t\t}\n\n\t\t\ttexture = texture.texture;\n\n\t\t}\n\n\t\tsetTexture2D( texture, slot );\n\n\t}\n\n\tfunction safeSetTextureCube( texture, slot ) {\n\n\t\tif ( texture && texture.isWebGLCubeRenderTarget ) {\n\n\t\t\tif ( warnedTextureCube === false ) {\n\n\t\t\t\tconsole.warn( 'THREE.WebGLTextures.safeSetTextureCube: don\\'t use cube render targets as textures. Use their .texture property instead.' );\n\t\t\t\twarnedTextureCube = true;\n\n\t\t\t}\n\n\t\t\ttexture = texture.texture;\n\n\t\t}\n\n\n\t\tsetTextureCube( texture, slot );\n\n\t}\n\n\t//\n\n\tthis.allocateTextureUnit = allocateTextureUnit;\n\tthis.resetTextureUnits = resetTextureUnits;\n\n\tthis.setTexture2D = setTexture2D;\n\tthis.setTexture2DArray = setTexture2DArray;\n\tthis.setTexture3D = setTexture3D;\n\tthis.setTextureCube = setTextureCube;\n\tthis.setupRenderTarget = setupRenderTarget;\n\tthis.updateRenderTargetMipmap = updateRenderTargetMipmap;\n\tthis.updateMultisampleRenderTarget = updateMultisampleRenderTarget;\n\n\tthis.safeSetTexture2D = safeSetTexture2D;\n\tthis.safeSetTextureCube = safeSetTextureCube;\n\n}\n\nfunction WebGLUtils( gl, extensions, capabilities ) {\n\n\tconst isWebGL2 = capabilities.isWebGL2;\n\n\tfunction convert( p ) {\n\n\t\tlet extension;\n\n\t\tif ( p === UnsignedByteType ) return 5121;\n\t\tif ( p === UnsignedShort4444Type ) return 32819;\n\t\tif ( p === UnsignedShort5551Type ) return 32820;\n\t\tif ( p === UnsignedShort565Type ) return 33635;\n\n\t\tif ( p === ByteType ) return 5120;\n\t\tif ( p === ShortType ) return 5122;\n\t\tif ( p === UnsignedShortType ) return 5123;\n\t\tif ( p === IntType ) return 5124;\n\t\tif ( p === UnsignedIntType ) return 5125;\n\t\tif ( p === FloatType ) return 5126;\n\n\t\tif ( p === HalfFloatType ) {\n\n\t\t\tif ( isWebGL2 ) return 5131;\n\n\t\t\textension = extensions.get( 'OES_texture_half_float' );\n\n\t\t\tif ( extension !== null ) {\n\n\t\t\t\treturn extension.HALF_FLOAT_OES;\n\n\t\t\t} else {\n\n\t\t\t\treturn null;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( p === AlphaFormat ) return 6406;\n\t\tif ( p === RGBFormat ) return 6407;\n\t\tif ( p === RGBAFormat ) return 6408;\n\t\tif ( p === LuminanceFormat ) return 6409;\n\t\tif ( p === LuminanceAlphaFormat ) return 6410;\n\t\tif ( p === DepthFormat ) return 6402;\n\t\tif ( p === DepthStencilFormat ) return 34041;\n\t\tif ( p === RedFormat ) return 6403;\n\n\t\t// WebGL2 formats.\n\n\t\tif ( p === RedIntegerFormat ) return 36244;\n\t\tif ( p === RGFormat ) return 33319;\n\t\tif ( p === RGIntegerFormat ) return 33320;\n\t\tif ( p === RGBIntegerFormat ) return 36248;\n\t\tif ( p === RGBAIntegerFormat ) return 36249;\n\n\t\tif ( p === RGB_S3TC_DXT1_Format || p === RGBA_S3TC_DXT1_Format ||\n\t\t\tp === RGBA_S3TC_DXT3_Format || p === RGBA_S3TC_DXT5_Format ) {\n\n\t\t\textension = extensions.get( 'WEBGL_compressed_texture_s3tc' );\n\n\t\t\tif ( extension !== null ) {\n\n\t\t\t\tif ( p === RGB_S3TC_DXT1_Format ) return extension.COMPRESSED_RGB_S3TC_DXT1_EXT;\n\t\t\t\tif ( p === RGBA_S3TC_DXT1_Format ) return extension.COMPRESSED_RGBA_S3TC_DXT1_EXT;\n\t\t\t\tif ( p === RGBA_S3TC_DXT3_Format ) return extension.COMPRESSED_RGBA_S3TC_DXT3_EXT;\n\t\t\t\tif ( p === RGBA_S3TC_DXT5_Format ) return extension.COMPRESSED_RGBA_S3TC_DXT5_EXT;\n\n\t\t\t} else {\n\n\t\t\t\treturn null;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( p === RGB_PVRTC_4BPPV1_Format || p === RGB_PVRTC_2BPPV1_Format ||\n\t\t\tp === RGBA_PVRTC_4BPPV1_Format || p === RGBA_PVRTC_2BPPV1_Format ) {\n\n\t\t\textension = extensions.get( 'WEBGL_compressed_texture_pvrtc' );\n\n\t\t\tif ( extension !== null ) {\n\n\t\t\t\tif ( p === RGB_PVRTC_4BPPV1_Format ) return extension.COMPRESSED_RGB_PVRTC_4BPPV1_IMG;\n\t\t\t\tif ( p === RGB_PVRTC_2BPPV1_Format ) return extension.COMPRESSED_RGB_PVRTC_2BPPV1_IMG;\n\t\t\t\tif ( p === RGBA_PVRTC_4BPPV1_Format ) return extension.COMPRESSED_RGBA_PVRTC_4BPPV1_IMG;\n\t\t\t\tif ( p === RGBA_PVRTC_2BPPV1_Format ) return extension.COMPRESSED_RGBA_PVRTC_2BPPV1_IMG;\n\n\t\t\t} else {\n\n\t\t\t\treturn null;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( p === RGB_ETC1_Format ) {\n\n\t\t\textension = extensions.get( 'WEBGL_compressed_texture_etc1' );\n\n\t\t\tif ( extension !== null ) {\n\n\t\t\t\treturn extension.COMPRESSED_RGB_ETC1_WEBGL;\n\n\t\t\t} else {\n\n\t\t\t\treturn null;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( p === RGB_ETC2_Format || p === RGBA_ETC2_EAC_Format ) {\n\n\t\t\textension = extensions.get( 'WEBGL_compressed_texture_etc' );\n\n\t\t\tif ( extension !== null ) {\n\n\t\t\t\tif ( p === RGB_ETC2_Format ) return extension.COMPRESSED_RGB8_ETC2;\n\t\t\t\tif ( p === RGBA_ETC2_EAC_Format ) return extension.COMPRESSED_RGBA8_ETC2_EAC;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( p === RGBA_ASTC_4x4_Format || p === RGBA_ASTC_5x4_Format || p === RGBA_ASTC_5x5_Format ||\n\t\t\tp === RGBA_ASTC_6x5_Format || p === RGBA_ASTC_6x6_Format || p === RGBA_ASTC_8x5_Format ||\n\t\t\tp === RGBA_ASTC_8x6_Format || p === RGBA_ASTC_8x8_Format || p === RGBA_ASTC_10x5_Format ||\n\t\t\tp === RGBA_ASTC_10x6_Format || p === RGBA_ASTC_10x8_Format || p === RGBA_ASTC_10x10_Format ||\n\t\t\tp === RGBA_ASTC_12x10_Format || p === RGBA_ASTC_12x12_Format ||\n\t\t\tp === SRGB8_ALPHA8_ASTC_4x4_Format || p === SRGB8_ALPHA8_ASTC_5x4_Format || p === SRGB8_ALPHA8_ASTC_5x5_Format ||\n\t\t\tp === SRGB8_ALPHA8_ASTC_6x5_Format || p === SRGB8_ALPHA8_ASTC_6x6_Format || p === SRGB8_ALPHA8_ASTC_8x5_Format ||\n\t\t\tp === SRGB8_ALPHA8_ASTC_8x6_Format || p === SRGB8_ALPHA8_ASTC_8x8_Format || p === SRGB8_ALPHA8_ASTC_10x5_Format ||\n\t\t\tp === SRGB8_ALPHA8_ASTC_10x6_Format || p === SRGB8_ALPHA8_ASTC_10x8_Format || p === SRGB8_ALPHA8_ASTC_10x10_Format ||\n\t\t\tp === SRGB8_ALPHA8_ASTC_12x10_Format || p === SRGB8_ALPHA8_ASTC_12x12_Format ) {\n\n\t\t\textension = extensions.get( 'WEBGL_compressed_texture_astc' );\n\n\t\t\tif ( extension !== null ) {\n\n\t\t\t\t// TODO Complete?\n\n\t\t\t\treturn p;\n\n\t\t\t} else {\n\n\t\t\t\treturn null;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( p === RGBA_BPTC_Format ) {\n\n\t\t\textension = extensions.get( 'EXT_texture_compression_bptc' );\n\n\t\t\tif ( extension !== null ) {\n\n\t\t\t\t// TODO Complete?\n\n\t\t\t\treturn p;\n\n\t\t\t} else {\n\n\t\t\t\treturn null;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( p === UnsignedInt248Type ) {\n\n\t\t\tif ( isWebGL2 ) return 34042;\n\n\t\t\textension = extensions.get( 'WEBGL_depth_texture' );\n\n\t\t\tif ( extension !== null ) {\n\n\t\t\t\treturn extension.UNSIGNED_INT_24_8_WEBGL;\n\n\t\t\t} else {\n\n\t\t\t\treturn null;\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\treturn { convert: convert };\n\n}\n\nfunction ArrayCamera( array = [] ) {\n\n\tPerspectiveCamera.call( this );\n\n\tthis.cameras = array;\n\n}\n\nArrayCamera.prototype = Object.assign( Object.create( PerspectiveCamera.prototype ), {\n\n\tconstructor: ArrayCamera,\n\n\tisArrayCamera: true\n\n} );\n\nfunction Group() {\n\n\tObject3D.call( this );\n\n\tthis.type = 'Group';\n\n}\n\nGroup.prototype = Object.assign( Object.create( Object3D.prototype ), {\n\n\tconstructor: Group,\n\n\tisGroup: true\n\n} );\n\nfunction WebXRController() {\n\n\tthis._targetRay = null;\n\tthis._grip = null;\n\tthis._hand = null;\n\n}\n\nObject.assign( WebXRController.prototype, {\n\n\tconstructor: WebXRController,\n\n\tgetHandSpace: function () {\n\n\t\tif ( this._hand === null ) {\n\n\t\t\tthis._hand = new Group();\n\t\t\tthis._hand.matrixAutoUpdate = false;\n\t\t\tthis._hand.visible = false;\n\n\t\t\tthis._hand.joints = {};\n\t\t\tthis._hand.inputState = { pinching: false };\n\n\t\t}\n\n\t\treturn this._hand;\n\n\t},\n\n\tgetTargetRaySpace: function () {\n\n\t\tif ( this._targetRay === null ) {\n\n\t\t\tthis._targetRay = new Group();\n\t\t\tthis._targetRay.matrixAutoUpdate = false;\n\t\t\tthis._targetRay.visible = false;\n\n\t\t}\n\n\t\treturn this._targetRay;\n\n\t},\n\n\tgetGripSpace: function () {\n\n\t\tif ( this._grip === null ) {\n\n\t\t\tthis._grip = new Group();\n\t\t\tthis._grip.matrixAutoUpdate = false;\n\t\t\tthis._grip.visible = false;\n\n\t\t}\n\n\t\treturn this._grip;\n\n\t},\n\n\tdispatchEvent: function ( event ) {\n\n\t\tif ( this._targetRay !== null ) {\n\n\t\t\tthis._targetRay.dispatchEvent( event );\n\n\t\t}\n\n\t\tif ( this._grip !== null ) {\n\n\t\t\tthis._grip.dispatchEvent( event );\n\n\t\t}\n\n\t\tif ( this._hand !== null ) {\n\n\t\t\tthis._hand.dispatchEvent( event );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tdisconnect: function ( inputSource ) {\n\n\t\tthis.dispatchEvent( { type: 'disconnected', data: inputSource } );\n\n\t\tif ( this._targetRay !== null ) {\n\n\t\t\tthis._targetRay.visible = false;\n\n\t\t}\n\n\t\tif ( this._grip !== null ) {\n\n\t\t\tthis._grip.visible = false;\n\n\t\t}\n\n\t\tif ( this._hand !== null ) {\n\n\t\t\tthis._hand.visible = false;\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tupdate: function ( inputSource, frame, referenceSpace ) {\n\n\t\tlet inputPose = null;\n\t\tlet gripPose = null;\n\t\tlet handPose = null;\n\n\t\tconst targetRay = this._targetRay;\n\t\tconst grip = this._grip;\n\t\tconst hand = this._hand;\n\n\t\tif ( inputSource && frame.session.visibilityState !== 'visible-blurred' ) {\n\n\t\t\tif ( hand && inputSource.hand ) {\n\n\t\t\t\thandPose = true;\n\n\t\t\t\tfor ( const inputjoint of inputSource.hand.values() ) {\n\n\t\t\t\t\t// Update the joints groups with the XRJoint poses\n\t\t\t\t\tconst jointPose = frame.getJointPose( inputjoint, referenceSpace );\n\n\t\t\t\t\tif ( hand.joints[ inputjoint.jointName ] === undefined ) {\n\n\t\t\t\t\t\t// The transform of this joint will be updated with the joint pose on each frame\n\t\t\t\t\t\tconst joint = new Group();\n\t\t\t\t\t\tjoint.matrixAutoUpdate = false;\n\t\t\t\t\t\tjoint.visible = false;\n\t\t\t\t\t\thand.joints[ inputjoint.jointName ] = joint;\n\t\t\t\t\t\t// ??\n\t\t\t\t\t\thand.add( joint );\n\n\t\t\t\t\t}\n\n\t\t\t\t\tconst joint = hand.joints[ inputjoint.jointName ];\n\n\t\t\t\t\tif ( jointPose !== null ) {\n\n\t\t\t\t\t\tjoint.matrix.fromArray( jointPose.transform.matrix );\n\t\t\t\t\t\tjoint.matrix.decompose( joint.position, joint.rotation, joint.scale );\n\t\t\t\t\t\tjoint.jointRadius = jointPose.radius;\n\n\t\t\t\t\t}\n\n\t\t\t\t\tjoint.visible = jointPose !== null;\n\n\t\t\t\t}\n\n\t\t\t\t// Custom events\n\n\t\t\t\t// Check pinchz\n\t\t\t\tconst indexTip = hand.joints[ 'index-finger-tip' ];\n\t\t\t\tconst thumbTip = hand.joints[ 'thumb-tip' ];\n\t\t\t\tconst distance = indexTip.position.distanceTo( thumbTip.position );\n\n\t\t\t\tconst distanceToPinch = 0.02;\n\t\t\t\tconst threshold = 0.005;\n\n\t\t\t\tif ( hand.inputState.pinching && distance > distanceToPinch + threshold ) {\n\n\t\t\t\t\thand.inputState.pinching = false;\n\t\t\t\t\tthis.dispatchEvent( {\n\t\t\t\t\t\ttype: 'pinchend',\n\t\t\t\t\t\thandedness: inputSource.handedness,\n\t\t\t\t\t\ttarget: this\n\t\t\t\t\t} );\n\n\t\t\t\t} else if ( ! hand.inputState.pinching && distance <= distanceToPinch - threshold ) {\n\n\t\t\t\t\thand.inputState.pinching = true;\n\t\t\t\t\tthis.dispatchEvent( {\n\t\t\t\t\t\ttype: 'pinchstart',\n\t\t\t\t\t\thandedness: inputSource.handedness,\n\t\t\t\t\t\ttarget: this\n\t\t\t\t\t} );\n\n\t\t\t\t}\n\n\t\t\t} else {\n\n\t\t\t\tif ( targetRay !== null ) {\n\n\t\t\t\t\tinputPose = frame.getPose( inputSource.targetRaySpace, referenceSpace );\n\n\t\t\t\t\tif ( inputPose !== null ) {\n\n\t\t\t\t\t\ttargetRay.matrix.fromArray( inputPose.transform.matrix );\n\t\t\t\t\t\ttargetRay.matrix.decompose( targetRay.position, targetRay.rotation, targetRay.scale );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\tif ( grip !== null && inputSource.gripSpace ) {\n\n\t\t\t\t\tgripPose = frame.getPose( inputSource.gripSpace, referenceSpace );\n\n\t\t\t\t\tif ( gripPose !== null ) {\n\n\t\t\t\t\t\tgrip.matrix.fromArray( gripPose.transform.matrix );\n\t\t\t\t\t\tgrip.matrix.decompose( grip.position, grip.rotation, grip.scale );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( targetRay !== null ) {\n\n\t\t\ttargetRay.visible = ( inputPose !== null );\n\n\t\t}\n\n\t\tif ( grip !== null ) {\n\n\t\t\tgrip.visible = ( gripPose !== null );\n\n\t\t}\n\n\t\tif ( hand !== null ) {\n\n\t\t\thand.visible = ( handPose !== null );\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n} );\n\nfunction WebXRManager( renderer, gl ) {\n\n\tconst scope = this;\n\n\tlet session = null;\n\n\tlet framebufferScaleFactor = 1.0;\n\n\tlet referenceSpace = null;\n\tlet referenceSpaceType = 'local-floor';\n\n\tlet pose = null;\n\n\tconst controllers = [];\n\tconst inputSourcesMap = new Map();\n\n\t//\n\n\tconst cameraL = new PerspectiveCamera();\n\tcameraL.layers.enable( 1 );\n\tcameraL.viewport = new Vector4();\n\n\tconst cameraR = new PerspectiveCamera();\n\tcameraR.layers.enable( 2 );\n\tcameraR.viewport = new Vector4();\n\n\tconst cameras = [ cameraL, cameraR ];\n\n\tconst cameraVR = new ArrayCamera();\n\tcameraVR.layers.enable( 1 );\n\tcameraVR.layers.enable( 2 );\n\n\tlet _currentDepthNear = null;\n\tlet _currentDepthFar = null;\n\n\t//\n\n\tthis.enabled = false;\n\n\tthis.isPresenting = false;\n\n\tthis.getController = function ( index ) {\n\n\t\tlet controller = controllers[ index ];\n\n\t\tif ( controller === undefined ) {\n\n\t\t\tcontroller = new WebXRController();\n\t\t\tcontrollers[ index ] = controller;\n\n\t\t}\n\n\t\treturn controller.getTargetRaySpace();\n\n\t};\n\n\tthis.getControllerGrip = function ( index ) {\n\n\t\tlet controller = controllers[ index ];\n\n\t\tif ( controller === undefined ) {\n\n\t\t\tcontroller = new WebXRController();\n\t\t\tcontrollers[ index ] = controller;\n\n\t\t}\n\n\t\treturn controller.getGripSpace();\n\n\t};\n\n\tthis.getHand = function ( index ) {\n\n\t\tlet controller = controllers[ index ];\n\n\t\tif ( controller === undefined ) {\n\n\t\t\tcontroller = new WebXRController();\n\t\t\tcontrollers[ index ] = controller;\n\n\t\t}\n\n\t\treturn controller.getHandSpace();\n\n\t};\n\n\t//\n\n\tfunction onSessionEvent( event ) {\n\n\t\tconst controller = inputSourcesMap.get( event.inputSource );\n\n\t\tif ( controller ) {\n\n\t\t\tcontroller.dispatchEvent( { type: event.type, data: event.inputSource } );\n\n\t\t}\n\n\t}\n\n\tfunction onSessionEnd() {\n\n\t\tinputSourcesMap.forEach( function ( controller, inputSource ) {\n\n\t\t\tcontroller.disconnect( inputSource );\n\n\t\t} );\n\n\t\tinputSourcesMap.clear();\n\n\t\t_currentDepthNear = null;\n\t\t_currentDepthFar = null;\n\n\t\t//\n\n\t\trenderer.setFramebuffer( null );\n\t\trenderer.setRenderTarget( renderer.getRenderTarget() ); // Hack #15830\n\t\tanimation.stop();\n\n\t\tscope.isPresenting = false;\n\n\t\tscope.dispatchEvent( { type: 'sessionend' } );\n\n\t}\n\n\tthis.setFramebufferScaleFactor = function ( value ) {\n\n\t\tframebufferScaleFactor = value;\n\n\t\tif ( scope.isPresenting === true ) {\n\n\t\t\tconsole.warn( 'THREE.WebXRManager: Cannot change framebuffer scale while presenting.' );\n\n\t\t}\n\n\t};\n\n\tthis.setReferenceSpaceType = function ( value ) {\n\n\t\treferenceSpaceType = value;\n\n\t\tif ( scope.isPresenting === true ) {\n\n\t\t\tconsole.warn( 'THREE.WebXRManager: Cannot change reference space type while presenting.' );\n\n\t\t}\n\n\t};\n\n\tthis.getReferenceSpace = function () {\n\n\t\treturn referenceSpace;\n\n\t};\n\n\tthis.getSession = function () {\n\n\t\treturn session;\n\n\t};\n\n\tthis.setSession = async function ( value ) {\n\n\t\tsession = value;\n\n\t\tif ( session !== null ) {\n\n\t\t\tsession.addEventListener( 'select', onSessionEvent );\n\t\t\tsession.addEventListener( 'selectstart', onSessionEvent );\n\t\t\tsession.addEventListener( 'selectend', onSessionEvent );\n\t\t\tsession.addEventListener( 'squeeze', onSessionEvent );\n\t\t\tsession.addEventListener( 'squeezestart', onSessionEvent );\n\t\t\tsession.addEventListener( 'squeezeend', onSessionEvent );\n\t\t\tsession.addEventListener( 'end', onSessionEnd );\n\t\t\tsession.addEventListener( 'inputsourceschange', onInputSourcesChange );\n\n\t\t\tconst attributes = gl.getContextAttributes();\n\n\t\t\tif ( attributes.xrCompatible !== true ) {\n\n\t\t\t\tawait gl.makeXRCompatible();\n\n\t\t\t}\n\n\t\t\tconst layerInit = {\n\t\t\t\tantialias: attributes.antialias,\n\t\t\t\talpha: attributes.alpha,\n\t\t\t\tdepth: attributes.depth,\n\t\t\t\tstencil: attributes.stencil,\n\t\t\t\tframebufferScaleFactor: framebufferScaleFactor\n\t\t\t};\n\n\t\t\t// eslint-disable-next-line no-undef\n\t\t\tconst baseLayer = new XRWebGLLayer( session, gl, layerInit );\n\n\t\t\tsession.updateRenderState( { baseLayer: baseLayer } );\n\n\t\t\treferenceSpace = await session.requestReferenceSpace( referenceSpaceType );\n\n\t\t\tanimation.setContext( session );\n\t\t\tanimation.start();\n\n\t\t\tscope.isPresenting = true;\n\n\t\t\tscope.dispatchEvent( { type: 'sessionstart' } );\n\n\t\t}\n\n\t};\n\n\tfunction onInputSourcesChange( event ) {\n\n\t\tconst inputSources = session.inputSources;\n\n\t\t// Assign inputSources to available controllers\n\n\t\tfor ( let i = 0; i < controllers.length; i ++ ) {\n\n\t\t\tinputSourcesMap.set( inputSources[ i ], controllers[ i ] );\n\n\t\t}\n\n\t\t// Notify disconnected\n\n\t\tfor ( let i = 0; i < event.removed.length; i ++ ) {\n\n\t\t\tconst inputSource = event.removed[ i ];\n\t\t\tconst controller = inputSourcesMap.get( inputSource );\n\n\t\t\tif ( controller ) {\n\n\t\t\t\tcontroller.dispatchEvent( { type: 'disconnected', data: inputSource } );\n\t\t\t\tinputSourcesMap.delete( inputSource );\n\n\t\t\t}\n\n\t\t}\n\n\t\t// Notify connected\n\n\t\tfor ( let i = 0; i < event.added.length; i ++ ) {\n\n\t\t\tconst inputSource = event.added[ i ];\n\t\t\tconst controller = inputSourcesMap.get( inputSource );\n\n\t\t\tif ( controller ) {\n\n\t\t\t\tcontroller.dispatchEvent( { type: 'connected', data: inputSource } );\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\t//\n\n\tconst cameraLPos = new Vector3();\n\tconst cameraRPos = new Vector3();\n\n\t/**\n\t * Assumes 2 cameras that are parallel and share an X-axis, and that\n\t * the cameras' projection and world matrices have already been set.\n\t * And that near and far planes are identical for both cameras.\n\t * Visualization of this technique: https://computergraphics.stackexchange.com/a/4765\n\t */\n\tfunction setProjectionFromUnion( camera, cameraL, cameraR ) {\n\n\t\tcameraLPos.setFromMatrixPosition( cameraL.matrixWorld );\n\t\tcameraRPos.setFromMatrixPosition( cameraR.matrixWorld );\n\n\t\tconst ipd = cameraLPos.distanceTo( cameraRPos );\n\n\t\tconst projL = cameraL.projectionMatrix.elements;\n\t\tconst projR = cameraR.projectionMatrix.elements;\n\n\t\t// VR systems will have identical far and near planes, and\n\t\t// most likely identical top and bottom frustum extents.\n\t\t// Use the left camera for these values.\n\t\tconst near = projL[ 14 ] / ( projL[ 10 ] - 1 );\n\t\tconst far = projL[ 14 ] / ( projL[ 10 ] + 1 );\n\t\tconst topFov = ( projL[ 9 ] + 1 ) / projL[ 5 ];\n\t\tconst bottomFov = ( projL[ 9 ] - 1 ) / projL[ 5 ];\n\n\t\tconst leftFov = ( projL[ 8 ] - 1 ) / projL[ 0 ];\n\t\tconst rightFov = ( projR[ 8 ] + 1 ) / projR[ 0 ];\n\t\tconst left = near * leftFov;\n\t\tconst right = near * rightFov;\n\n\t\t// Calculate the new camera's position offset from the\n\t\t// left camera. xOffset should be roughly half `ipd`.\n\t\tconst zOffset = ipd / ( - leftFov + rightFov );\n\t\tconst xOffset = zOffset * - leftFov;\n\n\t\t// TODO: Better way to apply this offset?\n\t\tcameraL.matrixWorld.decompose( camera.position, camera.quaternion, camera.scale );\n\t\tcamera.translateX( xOffset );\n\t\tcamera.translateZ( zOffset );\n\t\tcamera.matrixWorld.compose( camera.position, camera.quaternion, camera.scale );\n\t\tcamera.matrixWorldInverse.copy( camera.matrixWorld ).invert();\n\n\t\t// Find the union of the frustum values of the cameras and scale\n\t\t// the values so that the near plane's position does not change in world space,\n\t\t// although must now be relative to the new union camera.\n\t\tconst near2 = near + zOffset;\n\t\tconst far2 = far + zOffset;\n\t\tconst left2 = left - xOffset;\n\t\tconst right2 = right + ( ipd - xOffset );\n\t\tconst top2 = topFov * far / far2 * near2;\n\t\tconst bottom2 = bottomFov * far / far2 * near2;\n\n\t\tcamera.projectionMatrix.makePerspective( left2, right2, top2, bottom2, near2, far2 );\n\n\t}\n\n\tfunction updateCamera( camera, parent ) {\n\n\t\tif ( parent === null ) {\n\n\t\t\tcamera.matrixWorld.copy( camera.matrix );\n\n\t\t} else {\n\n\t\t\tcamera.matrixWorld.multiplyMatrices( parent.matrixWorld, camera.matrix );\n\n\t\t}\n\n\t\tcamera.matrixWorldInverse.copy( camera.matrixWorld ).invert();\n\n\t}\n\n\tthis.getCamera = function ( camera ) {\n\n\t\tcameraVR.near = cameraR.near = cameraL.near = camera.near;\n\t\tcameraVR.far = cameraR.far = cameraL.far = camera.far;\n\n\t\tif ( _currentDepthNear !== cameraVR.near || _currentDepthFar !== cameraVR.far ) {\n\n\t\t\t// Note that the new renderState won't apply until the next frame. See #18320\n\n\t\t\tsession.updateRenderState( {\n\t\t\t\tdepthNear: cameraVR.near,\n\t\t\t\tdepthFar: cameraVR.far\n\t\t\t} );\n\n\t\t\t_currentDepthNear = cameraVR.near;\n\t\t\t_currentDepthFar = cameraVR.far;\n\n\t\t}\n\n\t\tconst parent = camera.parent;\n\t\tconst cameras = cameraVR.cameras;\n\n\t\tupdateCamera( cameraVR, parent );\n\n\t\tfor ( let i = 0; i < cameras.length; i ++ ) {\n\n\t\t\tupdateCamera( cameras[ i ], parent );\n\n\t\t}\n\n\t\t// update camera and its children\n\n\t\tcamera.matrixWorld.copy( cameraVR.matrixWorld );\n\t\tcamera.matrix.copy( cameraVR.matrix );\n\t\tcamera.matrix.decompose( camera.position, camera.quaternion, camera.scale );\n\n\t\tconst children = camera.children;\n\n\t\tfor ( let i = 0, l = children.length; i < l; i ++ ) {\n\n\t\t\tchildren[ i ].updateMatrixWorld( true );\n\n\t\t}\n\n\t\t// update projection matrix for proper view frustum culling\n\n\t\tif ( cameras.length === 2 ) {\n\n\t\t\tsetProjectionFromUnion( cameraVR, cameraL, cameraR );\n\n\t\t} else {\n\n\t\t\t// assume single camera setup (AR)\n\n\t\t\tcameraVR.projectionMatrix.copy( cameraL.projectionMatrix );\n\n\t\t}\n\n\t\treturn cameraVR;\n\n\t};\n\n\t// Animation Loop\n\n\tlet onAnimationFrameCallback = null;\n\n\tfunction onAnimationFrame( time, frame ) {\n\n\t\tpose = frame.getViewerPose( referenceSpace );\n\n\t\tif ( pose !== null ) {\n\n\t\t\tconst views = pose.views;\n\t\t\tconst baseLayer = session.renderState.baseLayer;\n\n\t\t\trenderer.setFramebuffer( baseLayer.framebuffer );\n\n\t\t\tlet cameraVRNeedsUpdate = false;\n\n\t\t\t// check if it's necessary to rebuild cameraVR's camera list\n\n\t\t\tif ( views.length !== cameraVR.cameras.length ) {\n\n\t\t\t\tcameraVR.cameras.length = 0;\n\t\t\t\tcameraVRNeedsUpdate = true;\n\n\t\t\t}\n\n\t\t\tfor ( let i = 0; i < views.length; i ++ ) {\n\n\t\t\t\tconst view = views[ i ];\n\t\t\t\tconst viewport = baseLayer.getViewport( view );\n\n\t\t\t\tconst camera = cameras[ i ];\n\t\t\t\tcamera.matrix.fromArray( view.transform.matrix );\n\t\t\t\tcamera.projectionMatrix.fromArray( view.projectionMatrix );\n\t\t\t\tcamera.viewport.set( viewport.x, viewport.y, viewport.width, viewport.height );\n\n\t\t\t\tif ( i === 0 ) {\n\n\t\t\t\t\tcameraVR.matrix.copy( camera.matrix );\n\n\t\t\t\t}\n\n\t\t\t\tif ( cameraVRNeedsUpdate === true ) {\n\n\t\t\t\t\tcameraVR.cameras.push( camera );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\t//\n\n\t\tconst inputSources = session.inputSources;\n\n\t\tfor ( let i = 0; i < controllers.length; i ++ ) {\n\n\t\t\tconst controller = controllers[ i ];\n\t\t\tconst inputSource = inputSources[ i ];\n\n\t\t\tcontroller.update( inputSource, frame, referenceSpace );\n\n\t\t}\n\n\t\tif ( onAnimationFrameCallback ) onAnimationFrameCallback( time, frame );\n\n\t}\n\n\tconst animation = new WebGLAnimation();\n\tanimation.setAnimationLoop( onAnimationFrame );\n\n\tthis.setAnimationLoop = function ( callback ) {\n\n\t\tonAnimationFrameCallback = callback;\n\n\t};\n\n\tthis.dispose = function () {};\n\n}\n\nObject.assign( WebXRManager.prototype, EventDispatcher.prototype );\n\nfunction WebGLMaterials( properties ) {\n\n\tfunction refreshFogUniforms( uniforms, fog ) {\n\n\t\tuniforms.fogColor.value.copy( fog.color );\n\n\t\tif ( fog.isFog ) {\n\n\t\t\tuniforms.fogNear.value = fog.near;\n\t\t\tuniforms.fogFar.value = fog.far;\n\n\t\t} else if ( fog.isFogExp2 ) {\n\n\t\t\tuniforms.fogDensity.value = fog.density;\n\n\t\t}\n\n\t}\n\n\tfunction refreshMaterialUniforms( uniforms, material, pixelRatio, height ) {\n\n\t\tif ( material.isMeshBasicMaterial ) {\n\n\t\t\trefreshUniformsCommon( uniforms, material );\n\n\t\t} else if ( material.isMeshLambertMaterial ) {\n\n\t\t\trefreshUniformsCommon( uniforms, material );\n\t\t\trefreshUniformsLambert( uniforms, material );\n\n\t\t} else if ( material.isMeshToonMaterial ) {\n\n\t\t\trefreshUniformsCommon( uniforms, material );\n\t\t\trefreshUniformsToon( uniforms, material );\n\n\t\t} else if ( material.isMeshPhongMaterial ) {\n\n\t\t\trefreshUniformsCommon( uniforms, material );\n\t\t\trefreshUniformsPhong( uniforms, material );\n\n\t\t} else if ( material.isMeshStandardMaterial ) {\n\n\t\t\trefreshUniformsCommon( uniforms, material );\n\n\t\t\tif ( material.isMeshPhysicalMaterial ) {\n\n\t\t\t\trefreshUniformsPhysical( uniforms, material );\n\n\t\t\t} else {\n\n\t\t\t\trefreshUniformsStandard( uniforms, material );\n\n\t\t\t}\n\n\t\t} else if ( material.isMeshMatcapMaterial ) {\n\n\t\t\trefreshUniformsCommon( uniforms, material );\n\t\t\trefreshUniformsMatcap( uniforms, material );\n\n\t\t} else if ( material.isMeshDepthMaterial ) {\n\n\t\t\trefreshUniformsCommon( uniforms, material );\n\t\t\trefreshUniformsDepth( uniforms, material );\n\n\t\t} else if ( material.isMeshDistanceMaterial ) {\n\n\t\t\trefreshUniformsCommon( uniforms, material );\n\t\t\trefreshUniformsDistance( uniforms, material );\n\n\t\t} else if ( material.isMeshNormalMaterial ) {\n\n\t\t\trefreshUniformsCommon( uniforms, material );\n\t\t\trefreshUniformsNormal( uniforms, material );\n\n\t\t} else if ( material.isLineBasicMaterial ) {\n\n\t\t\trefreshUniformsLine( uniforms, material );\n\n\t\t\tif ( material.isLineDashedMaterial ) {\n\n\t\t\t\trefreshUniformsDash( uniforms, material );\n\n\t\t\t}\n\n\t\t} else if ( material.isPointsMaterial ) {\n\n\t\t\trefreshUniformsPoints( uniforms, material, pixelRatio, height );\n\n\t\t} else if ( material.isSpriteMaterial ) {\n\n\t\t\trefreshUniformsSprites( uniforms, material );\n\n\t\t} else if ( material.isShadowMaterial ) {\n\n\t\t\tuniforms.color.value.copy( material.color );\n\t\t\tuniforms.opacity.value = material.opacity;\n\n\t\t} else if ( material.isShaderMaterial ) {\n\n\t\t\tmaterial.uniformsNeedUpdate = false; // #15581\n\n\t\t}\n\n\t}\n\n\tfunction refreshUniformsCommon( uniforms, material ) {\n\n\t\tuniforms.opacity.value = material.opacity;\n\n\t\tif ( material.color ) {\n\n\t\t\tuniforms.diffuse.value.copy( material.color );\n\n\t\t}\n\n\t\tif ( material.emissive ) {\n\n\t\t\tuniforms.emissive.value.copy( material.emissive ).multiplyScalar( material.emissiveIntensity );\n\n\t\t}\n\n\t\tif ( material.map ) {\n\n\t\t\tuniforms.map.value = material.map;\n\n\t\t}\n\n\t\tif ( material.alphaMap ) {\n\n\t\t\tuniforms.alphaMap.value = material.alphaMap;\n\n\t\t}\n\n\t\tif ( material.specularMap ) {\n\n\t\t\tuniforms.specularMap.value = material.specularMap;\n\n\t\t}\n\n\t\tconst envMap = properties.get( material ).envMap;\n\n\t\tif ( envMap ) {\n\n\t\t\tuniforms.envMap.value = envMap;\n\n\t\t\tuniforms.flipEnvMap.value = ( envMap.isCubeTexture && envMap._needsFlipEnvMap ) ? - 1 : 1;\n\n\t\t\tuniforms.reflectivity.value = material.reflectivity;\n\t\t\tuniforms.refractionRatio.value = material.refractionRatio;\n\n\t\t\tconst maxMipLevel = properties.get( envMap ).__maxMipLevel;\n\n\t\t\tif ( maxMipLevel !== undefined ) {\n\n\t\t\t\tuniforms.maxMipLevel.value = maxMipLevel;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( material.lightMap ) {\n\n\t\t\tuniforms.lightMap.value = material.lightMap;\n\t\t\tuniforms.lightMapIntensity.value = material.lightMapIntensity;\n\n\t\t}\n\n\t\tif ( material.aoMap ) {\n\n\t\t\tuniforms.aoMap.value = material.aoMap;\n\t\t\tuniforms.aoMapIntensity.value = material.aoMapIntensity;\n\n\t\t}\n\n\t\t// uv repeat and offset setting priorities\n\t\t// 1. color map\n\t\t// 2. specular map\n\t\t// 3. displacementMap map\n\t\t// 4. normal map\n\t\t// 5. bump map\n\t\t// 6. roughnessMap map\n\t\t// 7. metalnessMap map\n\t\t// 8. alphaMap map\n\t\t// 9. emissiveMap map\n\t\t// 10. clearcoat map\n\t\t// 11. clearcoat normal map\n\t\t// 12. clearcoat roughnessMap map\n\n\t\tlet uvScaleMap;\n\n\t\tif ( material.map ) {\n\n\t\t\tuvScaleMap = material.map;\n\n\t\t} else if ( material.specularMap ) {\n\n\t\t\tuvScaleMap = material.specularMap;\n\n\t\t} else if ( material.displacementMap ) {\n\n\t\t\tuvScaleMap = material.displacementMap;\n\n\t\t} else if ( material.normalMap ) {\n\n\t\t\tuvScaleMap = material.normalMap;\n\n\t\t} else if ( material.bumpMap ) {\n\n\t\t\tuvScaleMap = material.bumpMap;\n\n\t\t} else if ( material.roughnessMap ) {\n\n\t\t\tuvScaleMap = material.roughnessMap;\n\n\t\t} else if ( material.metalnessMap ) {\n\n\t\t\tuvScaleMap = material.metalnessMap;\n\n\t\t} else if ( material.alphaMap ) {\n\n\t\t\tuvScaleMap = material.alphaMap;\n\n\t\t} else if ( material.emissiveMap ) {\n\n\t\t\tuvScaleMap = material.emissiveMap;\n\n\t\t} else if ( material.clearcoatMap ) {\n\n\t\t\tuvScaleMap = material.clearcoatMap;\n\n\t\t} else if ( material.clearcoatNormalMap ) {\n\n\t\t\tuvScaleMap = material.clearcoatNormalMap;\n\n\t\t} else if ( material.clearcoatRoughnessMap ) {\n\n\t\t\tuvScaleMap = material.clearcoatRoughnessMap;\n\n\t\t}\n\n\t\tif ( uvScaleMap !== undefined ) {\n\n\t\t\t// backwards compatibility\n\t\t\tif ( uvScaleMap.isWebGLRenderTarget ) {\n\n\t\t\t\tuvScaleMap = uvScaleMap.texture;\n\n\t\t\t}\n\n\t\t\tif ( uvScaleMap.matrixAutoUpdate === true ) {\n\n\t\t\t\tuvScaleMap.updateMatrix();\n\n\t\t\t}\n\n\t\t\tuniforms.uvTransform.value.copy( uvScaleMap.matrix );\n\n\t\t}\n\n\t\t// uv repeat and offset setting priorities for uv2\n\t\t// 1. ao map\n\t\t// 2. light map\n\n\t\tlet uv2ScaleMap;\n\n\t\tif ( material.aoMap ) {\n\n\t\t\tuv2ScaleMap = material.aoMap;\n\n\t\t} else if ( material.lightMap ) {\n\n\t\t\tuv2ScaleMap = material.lightMap;\n\n\t\t}\n\n\t\tif ( uv2ScaleMap !== undefined ) {\n\n\t\t\t// backwards compatibility\n\t\t\tif ( uv2ScaleMap.isWebGLRenderTarget ) {\n\n\t\t\t\tuv2ScaleMap = uv2ScaleMap.texture;\n\n\t\t\t}\n\n\t\t\tif ( uv2ScaleMap.matrixAutoUpdate === true ) {\n\n\t\t\t\tuv2ScaleMap.updateMatrix();\n\n\t\t\t}\n\n\t\t\tuniforms.uv2Transform.value.copy( uv2ScaleMap.matrix );\n\n\t\t}\n\n\t}\n\n\tfunction refreshUniformsLine( uniforms, material ) {\n\n\t\tuniforms.diffuse.value.copy( material.color );\n\t\tuniforms.opacity.value = material.opacity;\n\n\t}\n\n\tfunction refreshUniformsDash( uniforms, material ) {\n\n\t\tuniforms.dashSize.value = material.dashSize;\n\t\tuniforms.totalSize.value = material.dashSize + material.gapSize;\n\t\tuniforms.scale.value = material.scale;\n\n\t}\n\n\tfunction refreshUniformsPoints( uniforms, material, pixelRatio, height ) {\n\n\t\tuniforms.diffuse.value.copy( material.color );\n\t\tuniforms.opacity.value = material.opacity;\n\t\tuniforms.size.value = material.size * pixelRatio;\n\t\tuniforms.scale.value = height * 0.5;\n\n\t\tif ( material.map ) {\n\n\t\t\tuniforms.map.value = material.map;\n\n\t\t}\n\n\t\tif ( material.alphaMap ) {\n\n\t\t\tuniforms.alphaMap.value = material.alphaMap;\n\n\t\t}\n\n\t\t// uv repeat and offset setting priorities\n\t\t// 1. color map\n\t\t// 2. alpha map\n\n\t\tlet uvScaleMap;\n\n\t\tif ( material.map ) {\n\n\t\t\tuvScaleMap = material.map;\n\n\t\t} else if ( material.alphaMap ) {\n\n\t\t\tuvScaleMap = material.alphaMap;\n\n\t\t}\n\n\t\tif ( uvScaleMap !== undefined ) {\n\n\t\t\tif ( uvScaleMap.matrixAutoUpdate === true ) {\n\n\t\t\t\tuvScaleMap.updateMatrix();\n\n\t\t\t}\n\n\t\t\tuniforms.uvTransform.value.copy( uvScaleMap.matrix );\n\n\t\t}\n\n\t}\n\n\tfunction refreshUniformsSprites( uniforms, material ) {\n\n\t\tuniforms.diffuse.value.copy( material.color );\n\t\tuniforms.opacity.value = material.opacity;\n\t\tuniforms.rotation.value = material.rotation;\n\n\t\tif ( material.map ) {\n\n\t\t\tuniforms.map.value = material.map;\n\n\t\t}\n\n\t\tif ( material.alphaMap ) {\n\n\t\t\tuniforms.alphaMap.value = material.alphaMap;\n\n\t\t}\n\n\t\t// uv repeat and offset setting priorities\n\t\t// 1. color map\n\t\t// 2. alpha map\n\n\t\tlet uvScaleMap;\n\n\t\tif ( material.map ) {\n\n\t\t\tuvScaleMap = material.map;\n\n\t\t} else if ( material.alphaMap ) {\n\n\t\t\tuvScaleMap = material.alphaMap;\n\n\t\t}\n\n\t\tif ( uvScaleMap !== undefined ) {\n\n\t\t\tif ( uvScaleMap.matrixAutoUpdate === true ) {\n\n\t\t\t\tuvScaleMap.updateMatrix();\n\n\t\t\t}\n\n\t\t\tuniforms.uvTransform.value.copy( uvScaleMap.matrix );\n\n\t\t}\n\n\t}\n\n\tfunction refreshUniformsLambert( uniforms, material ) {\n\n\t\tif ( material.emissiveMap ) {\n\n\t\t\tuniforms.emissiveMap.value = material.emissiveMap;\n\n\t\t}\n\n\t}\n\n\tfunction refreshUniformsPhong( uniforms, material ) {\n\n\t\tuniforms.specular.value.copy( material.specular );\n\t\tuniforms.shininess.value = Math.max( material.shininess, 1e-4 ); // to prevent pow( 0.0, 0.0 )\n\n\t\tif ( material.emissiveMap ) {\n\n\t\t\tuniforms.emissiveMap.value = material.emissiveMap;\n\n\t\t}\n\n\t\tif ( material.bumpMap ) {\n\n\t\t\tuniforms.bumpMap.value = material.bumpMap;\n\t\t\tuniforms.bumpScale.value = material.bumpScale;\n\t\t\tif ( material.side === BackSide ) uniforms.bumpScale.value *= - 1;\n\n\t\t}\n\n\t\tif ( material.normalMap ) {\n\n\t\t\tuniforms.normalMap.value = material.normalMap;\n\t\t\tuniforms.normalScale.value.copy( material.normalScale );\n\t\t\tif ( material.side === BackSide ) uniforms.normalScale.value.negate();\n\n\t\t}\n\n\t\tif ( material.displacementMap ) {\n\n\t\t\tuniforms.displacementMap.value = material.displacementMap;\n\t\t\tuniforms.displacementScale.value = material.displacementScale;\n\t\t\tuniforms.displacementBias.value = material.displacementBias;\n\n\t\t}\n\n\t}\n\n\tfunction refreshUniformsToon( uniforms, material ) {\n\n\t\tif ( material.gradientMap ) {\n\n\t\t\tuniforms.gradientMap.value = material.gradientMap;\n\n\t\t}\n\n\t\tif ( material.emissiveMap ) {\n\n\t\t\tuniforms.emissiveMap.value = material.emissiveMap;\n\n\t\t}\n\n\t\tif ( material.bumpMap ) {\n\n\t\t\tuniforms.bumpMap.value = material.bumpMap;\n\t\t\tuniforms.bumpScale.value = material.bumpScale;\n\t\t\tif ( material.side === BackSide ) uniforms.bumpScale.value *= - 1;\n\n\t\t}\n\n\t\tif ( material.normalMap ) {\n\n\t\t\tuniforms.normalMap.value = material.normalMap;\n\t\t\tuniforms.normalScale.value.copy( material.normalScale );\n\t\t\tif ( material.side === BackSide ) uniforms.normalScale.value.negate();\n\n\t\t}\n\n\t\tif ( material.displacementMap ) {\n\n\t\t\tuniforms.displacementMap.value = material.displacementMap;\n\t\t\tuniforms.displacementScale.value = material.displacementScale;\n\t\t\tuniforms.displacementBias.value = material.displacementBias;\n\n\t\t}\n\n\t}\n\n\tfunction refreshUniformsStandard( uniforms, material ) {\n\n\t\tuniforms.roughness.value = material.roughness;\n\t\tuniforms.metalness.value = material.metalness;\n\n\t\tif ( material.roughnessMap ) {\n\n\t\t\tuniforms.roughnessMap.value = material.roughnessMap;\n\n\t\t}\n\n\t\tif ( material.metalnessMap ) {\n\n\t\t\tuniforms.metalnessMap.value = material.metalnessMap;\n\n\t\t}\n\n\t\tif ( material.emissiveMap ) {\n\n\t\t\tuniforms.emissiveMap.value = material.emissiveMap;\n\n\t\t}\n\n\t\tif ( material.bumpMap ) {\n\n\t\t\tuniforms.bumpMap.value = material.bumpMap;\n\t\t\tuniforms.bumpScale.value = material.bumpScale;\n\t\t\tif ( material.side === BackSide ) uniforms.bumpScale.value *= - 1;\n\n\t\t}\n\n\t\tif ( material.normalMap ) {\n\n\t\t\tuniforms.normalMap.value = material.normalMap;\n\t\t\tuniforms.normalScale.value.copy( material.normalScale );\n\t\t\tif ( material.side === BackSide ) uniforms.normalScale.value.negate();\n\n\t\t}\n\n\t\tif ( material.displacementMap ) {\n\n\t\t\tuniforms.displacementMap.value = material.displacementMap;\n\t\t\tuniforms.displacementScale.value = material.displacementScale;\n\t\t\tuniforms.displacementBias.value = material.displacementBias;\n\n\t\t}\n\n\t\tconst envMap = properties.get( material ).envMap;\n\n\t\tif ( envMap ) {\n\n\t\t\t//uniforms.envMap.value = material.envMap; // part of uniforms common\n\t\t\tuniforms.envMapIntensity.value = material.envMapIntensity;\n\n\t\t}\n\n\t}\n\n\tfunction refreshUniformsPhysical( uniforms, material ) {\n\n\t\trefreshUniformsStandard( uniforms, material );\n\n\t\tuniforms.reflectivity.value = material.reflectivity; // also part of uniforms common\n\n\t\tuniforms.clearcoat.value = material.clearcoat;\n\t\tuniforms.clearcoatRoughness.value = material.clearcoatRoughness;\n\t\tif ( material.sheen ) uniforms.sheen.value.copy( material.sheen );\n\n\t\tif ( material.clearcoatMap ) {\n\n\t\t\tuniforms.clearcoatMap.value = material.clearcoatMap;\n\n\t\t}\n\n\t\tif ( material.clearcoatRoughnessMap ) {\n\n\t\t\tuniforms.clearcoatRoughnessMap.value = material.clearcoatRoughnessMap;\n\n\t\t}\n\n\t\tif ( material.clearcoatNormalMap ) {\n\n\t\t\tuniforms.clearcoatNormalScale.value.copy( material.clearcoatNormalScale );\n\t\t\tuniforms.clearcoatNormalMap.value = material.clearcoatNormalMap;\n\n\t\t\tif ( material.side === BackSide ) {\n\n\t\t\t\tuniforms.clearcoatNormalScale.value.negate();\n\n\t\t\t}\n\n\t\t}\n\n\t\tuniforms.transmission.value = material.transmission;\n\n\t\tif ( material.transmissionMap ) {\n\n\t\t\tuniforms.transmissionMap.value = material.transmissionMap;\n\n\t\t}\n\n\t}\n\n\tfunction refreshUniformsMatcap( uniforms, material ) {\n\n\t\tif ( material.matcap ) {\n\n\t\t\tuniforms.matcap.value = material.matcap;\n\n\t\t}\n\n\t\tif ( material.bumpMap ) {\n\n\t\t\tuniforms.bumpMap.value = material.bumpMap;\n\t\t\tuniforms.bumpScale.value = material.bumpScale;\n\t\t\tif ( material.side === BackSide ) uniforms.bumpScale.value *= - 1;\n\n\t\t}\n\n\t\tif ( material.normalMap ) {\n\n\t\t\tuniforms.normalMap.value = material.normalMap;\n\t\t\tuniforms.normalScale.value.copy( material.normalScale );\n\t\t\tif ( material.side === BackSide ) uniforms.normalScale.value.negate();\n\n\t\t}\n\n\t\tif ( material.displacementMap ) {\n\n\t\t\tuniforms.displacementMap.value = material.displacementMap;\n\t\t\tuniforms.displacementScale.value = material.displacementScale;\n\t\t\tuniforms.displacementBias.value = material.displacementBias;\n\n\t\t}\n\n\t}\n\n\tfunction refreshUniformsDepth( uniforms, material ) {\n\n\t\tif ( material.displacementMap ) {\n\n\t\t\tuniforms.displacementMap.value = material.displacementMap;\n\t\t\tuniforms.displacementScale.value = material.displacementScale;\n\t\t\tuniforms.displacementBias.value = material.displacementBias;\n\n\t\t}\n\n\t}\n\n\tfunction refreshUniformsDistance( uniforms, material ) {\n\n\t\tif ( material.displacementMap ) {\n\n\t\t\tuniforms.displacementMap.value = material.displacementMap;\n\t\t\tuniforms.displacementScale.value = material.displacementScale;\n\t\t\tuniforms.displacementBias.value = material.displacementBias;\n\n\t\t}\n\n\t\tuniforms.referencePosition.value.copy( material.referencePosition );\n\t\tuniforms.nearDistance.value = material.nearDistance;\n\t\tuniforms.farDistance.value = material.farDistance;\n\n\t}\n\n\tfunction refreshUniformsNormal( uniforms, material ) {\n\n\t\tif ( material.bumpMap ) {\n\n\t\t\tuniforms.bumpMap.value = material.bumpMap;\n\t\t\tuniforms.bumpScale.value = material.bumpScale;\n\t\t\tif ( material.side === BackSide ) uniforms.bumpScale.value *= - 1;\n\n\t\t}\n\n\t\tif ( material.normalMap ) {\n\n\t\t\tuniforms.normalMap.value = material.normalMap;\n\t\t\tuniforms.normalScale.value.copy( material.normalScale );\n\t\t\tif ( material.side === BackSide ) uniforms.normalScale.value.negate();\n\n\t\t}\n\n\t\tif ( material.displacementMap ) {\n\n\t\t\tuniforms.displacementMap.value = material.displacementMap;\n\t\t\tuniforms.displacementScale.value = material.displacementScale;\n\t\t\tuniforms.displacementBias.value = material.displacementBias;\n\n\t\t}\n\n\t}\n\n\treturn {\n\t\trefreshFogUniforms: refreshFogUniforms,\n\t\trefreshMaterialUniforms: refreshMaterialUniforms\n\t};\n\n}\n\nfunction createCanvasElement() {\n\n\tconst canvas = document.createElementNS( 'http://www.w3.org/1999/xhtml', 'canvas' );\n\tcanvas.style.display = 'block';\n\treturn canvas;\n\n}\n\nfunction WebGLRenderer( parameters ) {\n\n\tparameters = parameters || {};\n\n\tconst _canvas = parameters.canvas !== undefined ? parameters.canvas : createCanvasElement(),\n\t\t_context = parameters.context !== undefined ? parameters.context : null,\n\n\t\t_alpha = parameters.alpha !== undefined ? parameters.alpha : false,\n\t\t_depth = parameters.depth !== undefined ? parameters.depth : true,\n\t\t_stencil = parameters.stencil !== undefined ? parameters.stencil : true,\n\t\t_antialias = parameters.antialias !== undefined ? parameters.antialias : false,\n\t\t_premultipliedAlpha = parameters.premultipliedAlpha !== undefined ? parameters.premultipliedAlpha : true,\n\t\t_preserveDrawingBuffer = parameters.preserveDrawingBuffer !== undefined ? parameters.preserveDrawingBuffer : false,\n\t\t_powerPreference = parameters.powerPreference !== undefined ? parameters.powerPreference : 'default',\n\t\t_failIfMajorPerformanceCaveat = parameters.failIfMajorPerformanceCaveat !== undefined ? parameters.failIfMajorPerformanceCaveat : false;\n\n\tlet currentRenderList = null;\n\tlet currentRenderState = null;\n\n\t// render() can be called from within a callback triggered by another render.\n\t// We track this so that the nested render call gets its state isolated from the parent render call.\n\n\tconst renderStateStack = [];\n\n\t// public properties\n\n\tthis.domElement = _canvas;\n\n\t// Debug configuration container\n\tthis.debug = {\n\n\t\t/**\n\t\t * Enables error checking and reporting when shader programs are being compiled\n\t\t * @type {boolean}\n\t\t */\n\t\tcheckShaderErrors: true\n\t};\n\n\t// clearing\n\n\tthis.autoClear = true;\n\tthis.autoClearColor = true;\n\tthis.autoClearDepth = true;\n\tthis.autoClearStencil = true;\n\n\t// scene graph\n\n\tthis.sortObjects = true;\n\n\t// user-defined clipping\n\n\tthis.clippingPlanes = [];\n\tthis.localClippingEnabled = false;\n\n\t// physically based shading\n\n\tthis.gammaFactor = 2.0;\t// for backwards compatibility\n\tthis.outputEncoding = LinearEncoding;\n\n\t// physical lights\n\n\tthis.physicallyCorrectLights = false;\n\n\t// tone mapping\n\n\tthis.toneMapping = NoToneMapping;\n\tthis.toneMappingExposure = 1.0;\n\n\t// morphs\n\n\tthis.maxMorphTargets = 8;\n\tthis.maxMorphNormals = 4;\n\n\t// internal properties\n\n\tconst _this = this;\n\n\tlet _isContextLost = false;\n\n\t// internal state cache\n\n\tlet _framebuffer = null;\n\n\tlet _currentActiveCubeFace = 0;\n\tlet _currentActiveMipmapLevel = 0;\n\tlet _currentRenderTarget = null;\n\tlet _currentFramebuffer = null;\n\tlet _currentMaterialId = - 1;\n\n\tlet _currentCamera = null;\n\n\tconst _currentViewport = new Vector4();\n\tconst _currentScissor = new Vector4();\n\tlet _currentScissorTest = null;\n\n\t//\n\n\tlet _width = _canvas.width;\n\tlet _height = _canvas.height;\n\n\tlet _pixelRatio = 1;\n\tlet _opaqueSort = null;\n\tlet _transparentSort = null;\n\n\tconst _viewport = new Vector4( 0, 0, _width, _height );\n\tconst _scissor = new Vector4( 0, 0, _width, _height );\n\tlet _scissorTest = false;\n\n\t// frustum\n\n\tconst _frustum = new Frustum();\n\n\t// clipping\n\n\tlet _clippingEnabled = false;\n\tlet _localClippingEnabled = false;\n\n\t// camera matrices cache\n\n\tconst _projScreenMatrix = new Matrix4();\n\n\tconst _vector3 = new Vector3();\n\n\tconst _emptyScene = { background: null, fog: null, environment: null, overrideMaterial: null, isScene: true };\n\n\tfunction getTargetPixelRatio() {\n\n\t\treturn _currentRenderTarget === null ? _pixelRatio : 1;\n\n\t}\n\n\t// initialize\n\n\tlet _gl = _context;\n\n\tfunction getContext( contextNames, contextAttributes ) {\n\n\t\tfor ( let i = 0; i < contextNames.length; i ++ ) {\n\n\t\t\tconst contextName = contextNames[ i ];\n\t\t\tconst context = _canvas.getContext( contextName, contextAttributes );\n\t\t\tif ( context !== null ) return context;\n\n\t\t}\n\n\t\treturn null;\n\n\t}\n\n\ttry {\n\n\t\tconst contextAttributes = {\n\t\t\talpha: _alpha,\n\t\t\tdepth: _depth,\n\t\t\tstencil: _stencil,\n\t\t\tantialias: _antialias,\n\t\t\tpremultipliedAlpha: _premultipliedAlpha,\n\t\t\tpreserveDrawingBuffer: _preserveDrawingBuffer,\n\t\t\tpowerPreference: _powerPreference,\n\t\t\tfailIfMajorPerformanceCaveat: _failIfMajorPerformanceCaveat\n\t\t};\n\n\t\t// event listeners must be registered before WebGL context is created, see #12753\n\n\t\t_canvas.addEventListener( 'webglcontextlost', onContextLost, false );\n\t\t_canvas.addEventListener( 'webglcontextrestored', onContextRestore, false );\n\n\t\tif ( _gl === null ) {\n\n\t\t\tconst contextNames = [ 'webgl2', 'webgl', 'experimental-webgl' ];\n\n\t\t\tif ( _this.isWebGL1Renderer === true ) {\n\n\t\t\t\tcontextNames.shift();\n\n\t\t\t}\n\n\t\t\t_gl = getContext( contextNames, contextAttributes );\n\n\t\t\tif ( _gl === null ) {\n\n\t\t\t\tif ( getContext( contextNames ) ) {\n\n\t\t\t\t\tthrow new Error( 'Error creating WebGL context with your selected attributes.' );\n\n\t\t\t\t} else {\n\n\t\t\t\t\tthrow new Error( 'Error creating WebGL context.' );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\t// Some experimental-webgl implementations do not have getShaderPrecisionFormat\n\n\t\tif ( _gl.getShaderPrecisionFormat === undefined ) {\n\n\t\t\t_gl.getShaderPrecisionFormat = function () {\n\n\t\t\t\treturn { 'rangeMin': 1, 'rangeMax': 1, 'precision': 1 };\n\n\t\t\t};\n\n\t\t}\n\n\t} catch ( error ) {\n\n\t\tconsole.error( 'THREE.WebGLRenderer: ' + error.message );\n\t\tthrow error;\n\n\t}\n\n\tlet extensions, capabilities, state, info;\n\tlet properties, textures, cubemaps, attributes, geometries, objects;\n\tlet programCache, materials, renderLists, renderStates, clipping;\n\n\tlet background, morphtargets, bufferRenderer, indexedBufferRenderer;\n\n\tlet utils, bindingStates;\n\n\tfunction initGLContext() {\n\n\t\textensions = new WebGLExtensions( _gl );\n\n\t\tcapabilities = new WebGLCapabilities( _gl, extensions, parameters );\n\n\t\textensions.init( capabilities );\n\n\t\tutils = new WebGLUtils( _gl, extensions, capabilities );\n\n\t\tstate = new WebGLState( _gl, extensions, capabilities );\n\t\tstate.scissor( _currentScissor.copy( _scissor ).multiplyScalar( _pixelRatio ).floor() );\n\t\tstate.viewport( _currentViewport.copy( _viewport ).multiplyScalar( _pixelRatio ).floor() );\n\n\t\tinfo = new WebGLInfo( _gl );\n\t\tproperties = new WebGLProperties();\n\t\ttextures = new WebGLTextures( _gl, extensions, state, properties, capabilities, utils, info );\n\t\tcubemaps = new WebGLCubeMaps( _this );\n\t\tattributes = new WebGLAttributes( _gl, capabilities );\n\t\tbindingStates = new WebGLBindingStates( _gl, extensions, attributes, capabilities );\n\t\tgeometries = new WebGLGeometries( _gl, attributes, info, bindingStates );\n\t\tobjects = new WebGLObjects( _gl, geometries, attributes, info );\n\t\tmorphtargets = new WebGLMorphtargets( _gl );\n\t\tclipping = new WebGLClipping( properties );\n\t\tprogramCache = new WebGLPrograms( _this, cubemaps, extensions, capabilities, bindingStates, clipping );\n\t\tmaterials = new WebGLMaterials( properties );\n\t\trenderLists = new WebGLRenderLists( properties );\n\t\trenderStates = new WebGLRenderStates( extensions, capabilities );\n\t\tbackground = new WebGLBackground( _this, cubemaps, state, objects, _premultipliedAlpha );\n\n\t\tbufferRenderer = new WebGLBufferRenderer( _gl, extensions, info, capabilities );\n\t\tindexedBufferRenderer = new WebGLIndexedBufferRenderer( _gl, extensions, info, capabilities );\n\n\t\tinfo.programs = programCache.programs;\n\n\t\t_this.capabilities = capabilities;\n\t\t_this.extensions = extensions;\n\t\t_this.properties = properties;\n\t\t_this.renderLists = renderLists;\n\t\t_this.state = state;\n\t\t_this.info = info;\n\n\t}\n\n\tinitGLContext();\n\n\t// xr\n\n\tconst xr = new WebXRManager( _this, _gl );\n\n\tthis.xr = xr;\n\n\t// shadow map\n\n\tconst shadowMap = new WebGLShadowMap( _this, objects, capabilities.maxTextureSize );\n\n\tthis.shadowMap = shadowMap;\n\n\t// API\n\n\tthis.getContext = function () {\n\n\t\treturn _gl;\n\n\t};\n\n\tthis.getContextAttributes = function () {\n\n\t\treturn _gl.getContextAttributes();\n\n\t};\n\n\tthis.forceContextLoss = function () {\n\n\t\tconst extension = extensions.get( 'WEBGL_lose_context' );\n\t\tif ( extension ) extension.loseContext();\n\n\t};\n\n\tthis.forceContextRestore = function () {\n\n\t\tconst extension = extensions.get( 'WEBGL_lose_context' );\n\t\tif ( extension ) extension.restoreContext();\n\n\t};\n\n\tthis.getPixelRatio = function () {\n\n\t\treturn _pixelRatio;\n\n\t};\n\n\tthis.setPixelRatio = function ( value ) {\n\n\t\tif ( value === undefined ) return;\n\n\t\t_pixelRatio = value;\n\n\t\tthis.setSize( _width, _height, false );\n\n\t};\n\n\tthis.getSize = function ( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'WebGLRenderer: .getsize() now requires a Vector2 as an argument' );\n\n\t\t\ttarget = new Vector2();\n\n\t\t}\n\n\t\treturn target.set( _width, _height );\n\n\t};\n\n\tthis.setSize = function ( width, height, updateStyle ) {\n\n\t\tif ( xr.isPresenting ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: Can\\'t change size while VR device is presenting.' );\n\t\t\treturn;\n\n\t\t}\n\n\t\t_width = width;\n\t\t_height = height;\n\n\t\t_canvas.width = Math.floor( width * _pixelRatio );\n\t\t_canvas.height = Math.floor( height * _pixelRatio );\n\n\t\tif ( updateStyle !== false ) {\n\n\t\t\t_canvas.style.width = width + 'px';\n\t\t\t_canvas.style.height = height + 'px';\n\n\t\t}\n\n\t\tthis.setViewport( 0, 0, width, height );\n\n\t};\n\n\tthis.getDrawingBufferSize = function ( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'WebGLRenderer: .getdrawingBufferSize() now requires a Vector2 as an argument' );\n\n\t\t\ttarget = new Vector2();\n\n\t\t}\n\n\t\treturn target.set( _width * _pixelRatio, _height * _pixelRatio ).floor();\n\n\t};\n\n\tthis.setDrawingBufferSize = function ( width, height, pixelRatio ) {\n\n\t\t_width = width;\n\t\t_height = height;\n\n\t\t_pixelRatio = pixelRatio;\n\n\t\t_canvas.width = Math.floor( width * pixelRatio );\n\t\t_canvas.height = Math.floor( height * pixelRatio );\n\n\t\tthis.setViewport( 0, 0, width, height );\n\n\t};\n\n\tthis.getCurrentViewport = function ( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'WebGLRenderer: .getCurrentViewport() now requires a Vector4 as an argument' );\n\n\t\t\ttarget = new Vector4();\n\n\t\t}\n\n\t\treturn target.copy( _currentViewport );\n\n\t};\n\n\tthis.getViewport = function ( target ) {\n\n\t\treturn target.copy( _viewport );\n\n\t};\n\n\tthis.setViewport = function ( x, y, width, height ) {\n\n\t\tif ( x.isVector4 ) {\n\n\t\t\t_viewport.set( x.x, x.y, x.z, x.w );\n\n\t\t} else {\n\n\t\t\t_viewport.set( x, y, width, height );\n\n\t\t}\n\n\t\tstate.viewport( _currentViewport.copy( _viewport ).multiplyScalar( _pixelRatio ).floor() );\n\n\t};\n\n\tthis.getScissor = function ( target ) {\n\n\t\treturn target.copy( _scissor );\n\n\t};\n\n\tthis.setScissor = function ( x, y, width, height ) {\n\n\t\tif ( x.isVector4 ) {\n\n\t\t\t_scissor.set( x.x, x.y, x.z, x.w );\n\n\t\t} else {\n\n\t\t\t_scissor.set( x, y, width, height );\n\n\t\t}\n\n\t\tstate.scissor( _currentScissor.copy( _scissor ).multiplyScalar( _pixelRatio ).floor() );\n\n\t};\n\n\tthis.getScissorTest = function () {\n\n\t\treturn _scissorTest;\n\n\t};\n\n\tthis.setScissorTest = function ( boolean ) {\n\n\t\tstate.setScissorTest( _scissorTest = boolean );\n\n\t};\n\n\tthis.setOpaqueSort = function ( method ) {\n\n\t\t_opaqueSort = method;\n\n\t};\n\n\tthis.setTransparentSort = function ( method ) {\n\n\t\t_transparentSort = method;\n\n\t};\n\n\t// Clearing\n\n\tthis.getClearColor = function ( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'WebGLRenderer: .getClearColor() now requires a Color as an argument' );\n\n\t\t\ttarget = new Color();\n\n\t\t}\n\n\t\treturn target.copy( background.getClearColor() );\n\n\t};\n\n\tthis.setClearColor = function () {\n\n\t\tbackground.setClearColor.apply( background, arguments );\n\n\t};\n\n\tthis.getClearAlpha = function () {\n\n\t\treturn background.getClearAlpha();\n\n\t};\n\n\tthis.setClearAlpha = function () {\n\n\t\tbackground.setClearAlpha.apply( background, arguments );\n\n\t};\n\n\tthis.clear = function ( color, depth, stencil ) {\n\n\t\tlet bits = 0;\n\n\t\tif ( color === undefined || color ) bits |= 16384;\n\t\tif ( depth === undefined || depth ) bits |= 256;\n\t\tif ( stencil === undefined || stencil ) bits |= 1024;\n\n\t\t_gl.clear( bits );\n\n\t};\n\n\tthis.clearColor = function () {\n\n\t\tthis.clear( true, false, false );\n\n\t};\n\n\tthis.clearDepth = function () {\n\n\t\tthis.clear( false, true, false );\n\n\t};\n\n\tthis.clearStencil = function () {\n\n\t\tthis.clear( false, false, true );\n\n\t};\n\n\t//\n\n\tthis.dispose = function () {\n\n\t\t_canvas.removeEventListener( 'webglcontextlost', onContextLost, false );\n\t\t_canvas.removeEventListener( 'webglcontextrestored', onContextRestore, false );\n\n\t\trenderLists.dispose();\n\t\trenderStates.dispose();\n\t\tproperties.dispose();\n\t\tcubemaps.dispose();\n\t\tobjects.dispose();\n\t\tbindingStates.dispose();\n\n\t\txr.dispose();\n\n\t\tanimation.stop();\n\n\t};\n\n\t// Events\n\n\tfunction onContextLost( event ) {\n\n\t\tevent.preventDefault();\n\n\t\tconsole.log( 'THREE.WebGLRenderer: Context Lost.' );\n\n\t\t_isContextLost = true;\n\n\t}\n\n\tfunction onContextRestore( /* event */ ) {\n\n\t\tconsole.log( 'THREE.WebGLRenderer: Context Restored.' );\n\n\t\t_isContextLost = false;\n\n\t\tinitGLContext();\n\n\t}\n\n\tfunction onMaterialDispose( event ) {\n\n\t\tconst material = event.target;\n\n\t\tmaterial.removeEventListener( 'dispose', onMaterialDispose );\n\n\t\tdeallocateMaterial( material );\n\n\t}\n\n\t// Buffer deallocation\n\n\tfunction deallocateMaterial( material ) {\n\n\t\treleaseMaterialProgramReference( material );\n\n\t\tproperties.remove( material );\n\n\t}\n\n\n\tfunction releaseMaterialProgramReference( material ) {\n\n\t\tconst programInfo = properties.get( material ).program;\n\n\t\tif ( programInfo !== undefined ) {\n\n\t\t\tprogramCache.releaseProgram( programInfo );\n\n\t\t}\n\n\t}\n\n\t// Buffer rendering\n\n\tfunction renderObjectImmediate( object, program ) {\n\n\t\tobject.render( function ( object ) {\n\n\t\t\t_this.renderBufferImmediate( object, program );\n\n\t\t} );\n\n\t}\n\n\tthis.renderBufferImmediate = function ( object, program ) {\n\n\t\tbindingStates.initAttributes();\n\n\t\tconst buffers = properties.get( object );\n\n\t\tif ( object.hasPositions && ! buffers.position ) buffers.position = _gl.createBuffer();\n\t\tif ( object.hasNormals && ! buffers.normal ) buffers.normal = _gl.createBuffer();\n\t\tif ( object.hasUvs && ! buffers.uv ) buffers.uv = _gl.createBuffer();\n\t\tif ( object.hasColors && ! buffers.color ) buffers.color = _gl.createBuffer();\n\n\t\tconst programAttributes = program.getAttributes();\n\n\t\tif ( object.hasPositions ) {\n\n\t\t\t_gl.bindBuffer( 34962, buffers.position );\n\t\t\t_gl.bufferData( 34962, object.positionArray, 35048 );\n\n\t\t\tbindingStates.enableAttribute( programAttributes.position );\n\t\t\t_gl.vertexAttribPointer( programAttributes.position, 3, 5126, false, 0, 0 );\n\n\t\t}\n\n\t\tif ( object.hasNormals ) {\n\n\t\t\t_gl.bindBuffer( 34962, buffers.normal );\n\t\t\t_gl.bufferData( 34962, object.normalArray, 35048 );\n\n\t\t\tbindingStates.enableAttribute( programAttributes.normal );\n\t\t\t_gl.vertexAttribPointer( programAttributes.normal, 3, 5126, false, 0, 0 );\n\n\t\t}\n\n\t\tif ( object.hasUvs ) {\n\n\t\t\t_gl.bindBuffer( 34962, buffers.uv );\n\t\t\t_gl.bufferData( 34962, object.uvArray, 35048 );\n\n\t\t\tbindingStates.enableAttribute( programAttributes.uv );\n\t\t\t_gl.vertexAttribPointer( programAttributes.uv, 2, 5126, false, 0, 0 );\n\n\t\t}\n\n\t\tif ( object.hasColors ) {\n\n\t\t\t_gl.bindBuffer( 34962, buffers.color );\n\t\t\t_gl.bufferData( 34962, object.colorArray, 35048 );\n\n\t\t\tbindingStates.enableAttribute( programAttributes.color );\n\t\t\t_gl.vertexAttribPointer( programAttributes.color, 3, 5126, false, 0, 0 );\n\n\t\t}\n\n\t\tbindingStates.disableUnusedAttributes();\n\n\t\t_gl.drawArrays( 4, 0, object.count );\n\n\t\tobject.count = 0;\n\n\t};\n\n\tthis.renderBufferDirect = function ( camera, scene, geometry, material, object, group ) {\n\n\t\tif ( scene === null ) scene = _emptyScene; // renderBufferDirect second parameter used to be fog (could be null)\n\n\t\tconst frontFaceCW = ( object.isMesh && object.matrixWorld.determinant() < 0 );\n\n\t\tconst program = setProgram( camera, scene, material, object );\n\n\t\tstate.setMaterial( material, frontFaceCW );\n\n\t\t//\n\n\t\tlet index = geometry.index;\n\t\tconst position = geometry.attributes.position;\n\n\t\t//\n\n\t\tif ( index === null ) {\n\n\t\t\tif ( position === undefined || position.count === 0 ) return;\n\n\t\t} else if ( index.count === 0 ) {\n\n\t\t\treturn;\n\n\t\t}\n\n\t\t//\n\n\t\tlet rangeFactor = 1;\n\n\t\tif ( material.wireframe === true ) {\n\n\t\t\tindex = geometries.getWireframeAttribute( geometry );\n\t\t\trangeFactor = 2;\n\n\t\t}\n\n\t\tif ( material.morphTargets || material.morphNormals ) {\n\n\t\t\tmorphtargets.update( object, geometry, material, program );\n\n\t\t}\n\n\t\tbindingStates.setup( object, material, program, geometry, index );\n\n\t\tlet attribute;\n\t\tlet renderer = bufferRenderer;\n\n\t\tif ( index !== null ) {\n\n\t\t\tattribute = attributes.get( index );\n\n\t\t\trenderer = indexedBufferRenderer;\n\t\t\trenderer.setIndex( attribute );\n\n\t\t}\n\n\t\t//\n\n\t\tconst dataCount = ( index !== null ) ? index.count : position.count;\n\n\t\tconst rangeStart = geometry.drawRange.start * rangeFactor;\n\t\tconst rangeCount = geometry.drawRange.count * rangeFactor;\n\n\t\tconst groupStart = group !== null ? group.start * rangeFactor : 0;\n\t\tconst groupCount = group !== null ? group.count * rangeFactor : Infinity;\n\n\t\tconst drawStart = Math.max( rangeStart, groupStart );\n\t\tconst drawEnd = Math.min( dataCount, rangeStart + rangeCount, groupStart + groupCount ) - 1;\n\n\t\tconst drawCount = Math.max( 0, drawEnd - drawStart + 1 );\n\n\t\tif ( drawCount === 0 ) return;\n\n\t\t//\n\n\t\tif ( object.isMesh ) {\n\n\t\t\tif ( material.wireframe === true ) {\n\n\t\t\t\tstate.setLineWidth( material.wireframeLinewidth * getTargetPixelRatio() );\n\t\t\t\trenderer.setMode( 1 );\n\n\t\t\t} else {\n\n\t\t\t\trenderer.setMode( 4 );\n\n\t\t\t}\n\n\t\t} else if ( object.isLine ) {\n\n\t\t\tlet lineWidth = material.linewidth;\n\n\t\t\tif ( lineWidth === undefined ) lineWidth = 1; // Not using Line*Material\n\n\t\t\tstate.setLineWidth( lineWidth * getTargetPixelRatio() );\n\n\t\t\tif ( object.isLineSegments ) {\n\n\t\t\t\trenderer.setMode( 1 );\n\n\t\t\t} else if ( object.isLineLoop ) {\n\n\t\t\t\trenderer.setMode( 2 );\n\n\t\t\t} else {\n\n\t\t\t\trenderer.setMode( 3 );\n\n\t\t\t}\n\n\t\t} else if ( object.isPoints ) {\n\n\t\t\trenderer.setMode( 0 );\n\n\t\t} else if ( object.isSprite ) {\n\n\t\t\trenderer.setMode( 4 );\n\n\t\t}\n\n\t\tif ( object.isInstancedMesh ) {\n\n\t\t\trenderer.renderInstances( drawStart, drawCount, object.count );\n\n\t\t} else if ( geometry.isInstancedBufferGeometry ) {\n\n\t\t\tconst instanceCount = Math.min( geometry.instanceCount, geometry._maxInstanceCount );\n\n\t\t\trenderer.renderInstances( drawStart, drawCount, instanceCount );\n\n\t\t} else {\n\n\t\t\trenderer.render( drawStart, drawCount );\n\n\t\t}\n\n\t};\n\n\t// Compile\n\n\tthis.compile = function ( scene, camera ) {\n\n\t\tcurrentRenderState = renderStates.get( scene );\n\t\tcurrentRenderState.init();\n\n\t\tscene.traverseVisible( function ( object ) {\n\n\t\t\tif ( object.isLight && object.layers.test( camera.layers ) ) {\n\n\t\t\t\tcurrentRenderState.pushLight( object );\n\n\t\t\t\tif ( object.castShadow ) {\n\n\t\t\t\t\tcurrentRenderState.pushShadow( object );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t} );\n\n\t\tcurrentRenderState.setupLights();\n\n\t\tconst compiled = new WeakMap();\n\n\t\tscene.traverse( function ( object ) {\n\n\t\t\tconst material = object.material;\n\n\t\t\tif ( material ) {\n\n\t\t\t\tif ( Array.isArray( material ) ) {\n\n\t\t\t\t\tfor ( let i = 0; i < material.length; i ++ ) {\n\n\t\t\t\t\t\tconst material2 = material[ i ];\n\n\t\t\t\t\t\tif ( compiled.has( material2 ) === false ) {\n\n\t\t\t\t\t\t\tinitMaterial( material2, scene, object );\n\t\t\t\t\t\t\tcompiled.set( material2 );\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t} else if ( compiled.has( material ) === false ) {\n\n\t\t\t\t\tinitMaterial( material, scene, object );\n\t\t\t\t\tcompiled.set( material );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t} );\n\n\t};\n\n\t// Animation Loop\n\n\tlet onAnimationFrameCallback = null;\n\n\tfunction onAnimationFrame( time ) {\n\n\t\tif ( xr.isPresenting ) return;\n\t\tif ( onAnimationFrameCallback ) onAnimationFrameCallback( time );\n\n\t}\n\n\tconst animation = new WebGLAnimation();\n\tanimation.setAnimationLoop( onAnimationFrame );\n\n\tif ( typeof window !== 'undefined' ) animation.setContext( window );\n\n\tthis.setAnimationLoop = function ( callback ) {\n\n\t\tonAnimationFrameCallback = callback;\n\t\txr.setAnimationLoop( callback );\n\n\t\t( callback === null ) ? animation.stop() : animation.start();\n\n\t};\n\n\t// Rendering\n\n\tthis.render = function ( scene, camera ) {\n\n\t\tlet renderTarget, forceClear;\n\n\t\tif ( arguments[ 2 ] !== undefined ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer.render(): the renderTarget argument has been removed. Use .setRenderTarget() instead.' );\n\t\t\trenderTarget = arguments[ 2 ];\n\n\t\t}\n\n\t\tif ( arguments[ 3 ] !== undefined ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer.render(): the forceClear argument has been removed. Use .clear() instead.' );\n\t\t\tforceClear = arguments[ 3 ];\n\n\t\t}\n\n\t\tif ( camera !== undefined && camera.isCamera !== true ) {\n\n\t\t\tconsole.error( 'THREE.WebGLRenderer.render: camera is not an instance of THREE.Camera.' );\n\t\t\treturn;\n\n\t\t}\n\n\t\tif ( _isContextLost === true ) return;\n\n\t\t// reset caching for this frame\n\n\t\tbindingStates.resetDefaultState();\n\t\t_currentMaterialId = - 1;\n\t\t_currentCamera = null;\n\n\t\t// update scene graph\n\n\t\tif ( scene.autoUpdate === true ) scene.updateMatrixWorld();\n\n\t\t// update camera matrices and frustum\n\n\t\tif ( camera.parent === null ) camera.updateMatrixWorld();\n\n\t\tif ( xr.enabled === true && xr.isPresenting === true ) {\n\n\t\t\tcamera = xr.getCamera( camera );\n\n\t\t}\n\n\t\t//\n\t\tif ( scene.isScene === true ) scene.onBeforeRender( _this, scene, camera, renderTarget || _currentRenderTarget );\n\n\t\tcurrentRenderState = renderStates.get( scene, renderStateStack.length );\n\t\tcurrentRenderState.init();\n\n\t\trenderStateStack.push( currentRenderState );\n\n\t\t_projScreenMatrix.multiplyMatrices( camera.projectionMatrix, camera.matrixWorldInverse );\n\t\t_frustum.setFromProjectionMatrix( _projScreenMatrix );\n\n\t\t_localClippingEnabled = this.localClippingEnabled;\n\t\t_clippingEnabled = clipping.init( this.clippingPlanes, _localClippingEnabled, camera );\n\n\t\tcurrentRenderList = renderLists.get( scene, camera );\n\t\tcurrentRenderList.init();\n\n\t\tprojectObject( scene, camera, 0, _this.sortObjects );\n\n\t\tcurrentRenderList.finish();\n\n\t\tif ( _this.sortObjects === true ) {\n\n\t\t\tcurrentRenderList.sort( _opaqueSort, _transparentSort );\n\n\t\t}\n\n\t\t//\n\n\t\tif ( _clippingEnabled === true ) clipping.beginShadows();\n\n\t\tconst shadowsArray = currentRenderState.state.shadowsArray;\n\n\t\tshadowMap.render( shadowsArray, scene, camera );\n\n\t\tcurrentRenderState.setupLights();\n\t\tcurrentRenderState.setupLightsView( camera );\n\n\t\tif ( _clippingEnabled === true ) clipping.endShadows();\n\n\t\t//\n\n\t\tif ( this.info.autoReset === true ) this.info.reset();\n\n\t\tif ( renderTarget !== undefined ) {\n\n\t\t\tthis.setRenderTarget( renderTarget );\n\n\t\t}\n\n\t\t//\n\n\t\tbackground.render( currentRenderList, scene, camera, forceClear );\n\n\t\t// render scene\n\n\t\tconst opaqueObjects = currentRenderList.opaque;\n\t\tconst transparentObjects = currentRenderList.transparent;\n\n\t\tif ( opaqueObjects.length > 0 ) renderObjects( opaqueObjects, scene, camera );\n\t\tif ( transparentObjects.length > 0 ) renderObjects( transparentObjects, scene, camera );\n\n\t\t//\n\n\t\tif ( scene.isScene === true ) scene.onAfterRender( _this, scene, camera );\n\n\t\t//\n\n\t\tif ( _currentRenderTarget !== null ) {\n\n\t\t\t// Generate mipmap if we're using any kind of mipmap filtering\n\n\t\t\ttextures.updateRenderTargetMipmap( _currentRenderTarget );\n\n\t\t\t// resolve multisample renderbuffers to a single-sample texture if necessary\n\n\t\t\ttextures.updateMultisampleRenderTarget( _currentRenderTarget );\n\n\t\t}\n\n\t\t// Ensure depth buffer writing is enabled so it can be cleared on next render\n\n\t\tstate.buffers.depth.setTest( true );\n\t\tstate.buffers.depth.setMask( true );\n\t\tstate.buffers.color.setMask( true );\n\n\t\tstate.setPolygonOffset( false );\n\n\t\t// _gl.finish();\n\n\t\trenderStateStack.pop();\n\t\tif ( renderStateStack.length > 0 ) {\n\n\t\t\tcurrentRenderState = renderStateStack[ renderStateStack.length - 1 ];\n\n\t\t} else {\n\n\t\t\tcurrentRenderState = null;\n\n\t\t}\n\n\t\tcurrentRenderList = null;\n\n\t};\n\n\tfunction projectObject( object, camera, groupOrder, sortObjects ) {\n\n\t\tif ( object.visible === false ) return;\n\n\t\tconst visible = object.layers.test( camera.layers );\n\n\t\tif ( visible ) {\n\n\t\t\tif ( object.isGroup ) {\n\n\t\t\t\tgroupOrder = object.renderOrder;\n\n\t\t\t} else if ( object.isLOD ) {\n\n\t\t\t\tif ( object.autoUpdate === true ) object.update( camera );\n\n\t\t\t} else if ( object.isLight ) {\n\n\t\t\t\tcurrentRenderState.pushLight( object );\n\n\t\t\t\tif ( object.castShadow ) {\n\n\t\t\t\t\tcurrentRenderState.pushShadow( object );\n\n\t\t\t\t}\n\n\t\t\t} else if ( object.isSprite ) {\n\n\t\t\t\tif ( ! object.frustumCulled || _frustum.intersectsSprite( object ) ) {\n\n\t\t\t\t\tif ( sortObjects ) {\n\n\t\t\t\t\t\t_vector3.setFromMatrixPosition( object.matrixWorld )\n\t\t\t\t\t\t\t.applyMatrix4( _projScreenMatrix );\n\n\t\t\t\t\t}\n\n\t\t\t\t\tconst geometry = objects.update( object );\n\t\t\t\t\tconst material = object.material;\n\n\t\t\t\t\tif ( material.visible ) {\n\n\t\t\t\t\t\tcurrentRenderList.push( object, geometry, material, groupOrder, _vector3.z, null );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t} else if ( object.isImmediateRenderObject ) {\n\n\t\t\t\tif ( sortObjects ) {\n\n\t\t\t\t\t_vector3.setFromMatrixPosition( object.matrixWorld )\n\t\t\t\t\t\t.applyMatrix4( _projScreenMatrix );\n\n\t\t\t\t}\n\n\t\t\t\tcurrentRenderList.push( object, null, object.material, groupOrder, _vector3.z, null );\n\n\t\t\t} else if ( object.isMesh || object.isLine || object.isPoints ) {\n\n\t\t\t\tif ( object.isSkinnedMesh ) {\n\n\t\t\t\t\t// update skeleton only once in a frame\n\n\t\t\t\t\tif ( object.skeleton.frame !== info.render.frame ) {\n\n\t\t\t\t\t\tobject.skeleton.update();\n\t\t\t\t\t\tobject.skeleton.frame = info.render.frame;\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\tif ( ! object.frustumCulled || _frustum.intersectsObject( object ) ) {\n\n\t\t\t\t\tif ( sortObjects ) {\n\n\t\t\t\t\t\t_vector3.setFromMatrixPosition( object.matrixWorld )\n\t\t\t\t\t\t\t.applyMatrix4( _projScreenMatrix );\n\n\t\t\t\t\t}\n\n\t\t\t\t\tconst geometry = objects.update( object );\n\t\t\t\t\tconst material = object.material;\n\n\t\t\t\t\tif ( Array.isArray( material ) ) {\n\n\t\t\t\t\t\tconst groups = geometry.groups;\n\n\t\t\t\t\t\tfor ( let i = 0, l = groups.length; i < l; i ++ ) {\n\n\t\t\t\t\t\t\tconst group = groups[ i ];\n\t\t\t\t\t\t\tconst groupMaterial = material[ group.materialIndex ];\n\n\t\t\t\t\t\t\tif ( groupMaterial && groupMaterial.visible ) {\n\n\t\t\t\t\t\t\t\tcurrentRenderList.push( object, geometry, groupMaterial, groupOrder, _vector3.z, group );\n\n\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t} else if ( material.visible ) {\n\n\t\t\t\t\t\tcurrentRenderList.push( object, geometry, material, groupOrder, _vector3.z, null );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\tconst children = object.children;\n\n\t\tfor ( let i = 0, l = children.length; i < l; i ++ ) {\n\n\t\t\tprojectObject( children[ i ], camera, groupOrder, sortObjects );\n\n\t\t}\n\n\t}\n\n\tfunction renderObjects( renderList, scene, camera ) {\n\n\t\tconst overrideMaterial = scene.isScene === true ? scene.overrideMaterial : null;\n\n\t\tfor ( let i = 0, l = renderList.length; i < l; i ++ ) {\n\n\t\t\tconst renderItem = renderList[ i ];\n\n\t\t\tconst object = renderItem.object;\n\t\t\tconst geometry = renderItem.geometry;\n\t\t\tconst material = overrideMaterial === null ? renderItem.material : overrideMaterial;\n\t\t\tconst group = renderItem.group;\n\n\t\t\tif ( camera.isArrayCamera ) {\n\n\t\t\t\tconst cameras = camera.cameras;\n\n\t\t\t\tfor ( let j = 0, jl = cameras.length; j < jl; j ++ ) {\n\n\t\t\t\t\tconst camera2 = cameras[ j ];\n\n\t\t\t\t\tif ( object.layers.test( camera2.layers ) ) {\n\n\t\t\t\t\t\tstate.viewport( _currentViewport.copy( camera2.viewport ) );\n\n\t\t\t\t\t\tcurrentRenderState.setupLightsView( camera2 );\n\n\t\t\t\t\t\trenderObject( object, scene, camera2, geometry, material, group );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t} else {\n\n\t\t\t\trenderObject( object, scene, camera, geometry, material, group );\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\tfunction renderObject( object, scene, camera, geometry, material, group ) {\n\n\t\tobject.onBeforeRender( _this, scene, camera, geometry, material, group );\n\n\t\tobject.modelViewMatrix.multiplyMatrices( camera.matrixWorldInverse, object.matrixWorld );\n\t\tobject.normalMatrix.getNormalMatrix( object.modelViewMatrix );\n\n\t\tif ( object.isImmediateRenderObject ) {\n\n\t\t\tconst program = setProgram( camera, scene, material, object );\n\n\t\t\tstate.setMaterial( material );\n\n\t\t\tbindingStates.reset();\n\n\t\t\trenderObjectImmediate( object, program );\n\n\t\t} else {\n\n\t\t\t_this.renderBufferDirect( camera, scene, geometry, material, object, group );\n\n\t\t}\n\n\t\tobject.onAfterRender( _this, scene, camera, geometry, material, group );\n\n\t}\n\n\tfunction initMaterial( material, scene, object ) {\n\n\t\tif ( scene.isScene !== true ) scene = _emptyScene; // scene could be a Mesh, Line, Points, ...\n\n\t\tconst materialProperties = properties.get( material );\n\n\t\tconst lights = currentRenderState.state.lights;\n\t\tconst shadowsArray = currentRenderState.state.shadowsArray;\n\n\t\tconst lightsStateVersion = lights.state.version;\n\n\t\tconst parameters = programCache.getParameters( material, lights.state, shadowsArray, scene, object );\n\t\tconst programCacheKey = programCache.getProgramCacheKey( parameters );\n\n\t\tlet program = materialProperties.program;\n\t\tlet programChange = true;\n\n\t\t// always update environment and fog - changing these trigger an initMaterial call, but it's possible that the program doesn't change\n\n\t\tmaterialProperties.environment = material.isMeshStandardMaterial ? scene.environment : null;\n\t\tmaterialProperties.fog = scene.fog;\n\t\tmaterialProperties.envMap = cubemaps.get( material.envMap || materialProperties.environment );\n\n\t\tif ( program === undefined ) {\n\n\t\t\t// new material\n\t\t\tmaterial.addEventListener( 'dispose', onMaterialDispose );\n\n\t\t} else if ( program.cacheKey !== programCacheKey ) {\n\n\t\t\t// changed glsl or parameters\n\t\t\treleaseMaterialProgramReference( material );\n\n\t\t} else if ( materialProperties.lightsStateVersion !== lightsStateVersion ) {\n\n\t\t\tprogramChange = false;\n\n\t\t} else if ( parameters.shaderID !== undefined ) {\n\n\t\t\t// same glsl and uniform list\n\t\t\treturn;\n\n\t\t} else {\n\n\t\t\t// only rebuild uniform list\n\t\t\tprogramChange = false;\n\n\t\t}\n\n\t\tif ( programChange ) {\n\n\t\t\tparameters.uniforms = programCache.getUniforms( material );\n\n\t\t\tmaterial.onBeforeCompile( parameters, _this );\n\n\t\t\tprogram = programCache.acquireProgram( parameters, programCacheKey );\n\n\t\t\tmaterialProperties.program = program;\n\t\t\tmaterialProperties.uniforms = parameters.uniforms;\n\t\t\tmaterialProperties.outputEncoding = parameters.outputEncoding;\n\n\t\t}\n\n\t\tconst uniforms = materialProperties.uniforms;\n\n\t\tif ( ! material.isShaderMaterial &&\n\t\t\t! material.isRawShaderMaterial ||\n\t\t\tmaterial.clipping === true ) {\n\n\t\t\tmaterialProperties.numClippingPlanes = clipping.numPlanes;\n\t\t\tmaterialProperties.numIntersection = clipping.numIntersection;\n\t\t\tuniforms.clippingPlanes = clipping.uniform;\n\n\t\t}\n\n\t\t// store the light setup it was created for\n\n\t\tmaterialProperties.needsLights = materialNeedsLights( material );\n\t\tmaterialProperties.lightsStateVersion = lightsStateVersion;\n\n\t\tif ( materialProperties.needsLights ) {\n\n\t\t\t// wire up the material to this renderer's lighting state\n\n\t\t\tuniforms.ambientLightColor.value = lights.state.ambient;\n\t\t\tuniforms.lightProbe.value = lights.state.probe;\n\t\t\tuniforms.directionalLights.value = lights.state.directional;\n\t\t\tuniforms.directionalLightShadows.value = lights.state.directionalShadow;\n\t\t\tuniforms.spotLights.value = lights.state.spot;\n\t\t\tuniforms.spotLightShadows.value = lights.state.spotShadow;\n\t\t\tuniforms.rectAreaLights.value = lights.state.rectArea;\n\t\t\tuniforms.ltc_1.value = lights.state.rectAreaLTC1;\n\t\t\tuniforms.ltc_2.value = lights.state.rectAreaLTC2;\n\t\t\tuniforms.pointLights.value = lights.state.point;\n\t\t\tuniforms.pointLightShadows.value = lights.state.pointShadow;\n\t\t\tuniforms.hemisphereLights.value = lights.state.hemi;\n\n\t\t\tuniforms.directionalShadowMap.value = lights.state.directionalShadowMap;\n\t\t\tuniforms.directionalShadowMatrix.value = lights.state.directionalShadowMatrix;\n\t\t\tuniforms.spotShadowMap.value = lights.state.spotShadowMap;\n\t\t\tuniforms.spotShadowMatrix.value = lights.state.spotShadowMatrix;\n\t\t\tuniforms.pointShadowMap.value = lights.state.pointShadowMap;\n\t\t\tuniforms.pointShadowMatrix.value = lights.state.pointShadowMatrix;\n\t\t\t// TODO (abelnation): add area lights shadow info to uniforms\n\n\t\t}\n\n\t\tconst progUniforms = materialProperties.program.getUniforms();\n\t\tconst uniformsList = WebGLUniforms.seqWithValue( progUniforms.seq, uniforms );\n\n\t\tmaterialProperties.uniformsList = uniformsList;\n\n\t}\n\n\tfunction setProgram( camera, scene, material, object ) {\n\n\t\tif ( scene.isScene !== true ) scene = _emptyScene; // scene could be a Mesh, Line, Points, ...\n\n\t\ttextures.resetTextureUnits();\n\n\t\tconst fog = scene.fog;\n\t\tconst environment = material.isMeshStandardMaterial ? scene.environment : null;\n\t\tconst encoding = ( _currentRenderTarget === null ) ? _this.outputEncoding : _currentRenderTarget.texture.encoding;\n\t\tconst envMap = cubemaps.get( material.envMap || environment );\n\n\t\tconst materialProperties = properties.get( material );\n\t\tconst lights = currentRenderState.state.lights;\n\n\t\tif ( _clippingEnabled === true ) {\n\n\t\t\tif ( _localClippingEnabled === true || camera !== _currentCamera ) {\n\n\t\t\t\tconst useCache =\n\t\t\t\t\tcamera === _currentCamera &&\n\t\t\t\t\tmaterial.id === _currentMaterialId;\n\n\t\t\t\t// we might want to call this function with some ClippingGroup\n\t\t\t\t// object instead of the material, once it becomes feasible\n\t\t\t\t// (#8465, #8379)\n\t\t\t\tclipping.setState( material, camera, useCache );\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( material.version === materialProperties.__version ) {\n\n\t\t\tif ( material.fog && materialProperties.fog !== fog ) {\n\n\t\t\t\tinitMaterial( material, scene, object );\n\n\t\t\t} else if ( materialProperties.environment !== environment ) {\n\n\t\t\t\tinitMaterial( material, scene, object );\n\n\t\t\t} else if ( materialProperties.needsLights && ( materialProperties.lightsStateVersion !== lights.state.version ) ) {\n\n\t\t\t\tinitMaterial( material, scene, object );\n\n\t\t\t} else if ( materialProperties.numClippingPlanes !== undefined &&\n\t\t\t\t( materialProperties.numClippingPlanes !== clipping.numPlanes ||\n\t\t\t\tmaterialProperties.numIntersection !== clipping.numIntersection ) ) {\n\n\t\t\t\tinitMaterial( material, scene, object );\n\n\t\t\t} else if ( materialProperties.outputEncoding !== encoding ) {\n\n\t\t\t\tinitMaterial( material, scene, object );\n\n\t\t\t} else if ( materialProperties.envMap !== envMap ) {\n\n\t\t\t\tinitMaterial( material, scene, object );\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\tinitMaterial( material, scene, object );\n\t\t\tmaterialProperties.__version = material.version;\n\n\t\t}\n\n\t\tlet refreshProgram = false;\n\t\tlet refreshMaterial = false;\n\t\tlet refreshLights = false;\n\n\t\tconst program = materialProperties.program,\n\t\t\tp_uniforms = program.getUniforms(),\n\t\t\tm_uniforms = materialProperties.uniforms;\n\n\t\tif ( state.useProgram( program.program ) ) {\n\n\t\t\trefreshProgram = true;\n\t\t\trefreshMaterial = true;\n\t\t\trefreshLights = true;\n\n\t\t}\n\n\t\tif ( material.id !== _currentMaterialId ) {\n\n\t\t\t_currentMaterialId = material.id;\n\n\t\t\trefreshMaterial = true;\n\n\t\t}\n\n\t\tif ( refreshProgram || _currentCamera !== camera ) {\n\n\t\t\tp_uniforms.setValue( _gl, 'projectionMatrix', camera.projectionMatrix );\n\n\t\t\tif ( capabilities.logarithmicDepthBuffer ) {\n\n\t\t\t\tp_uniforms.setValue( _gl, 'logDepthBufFC',\n\t\t\t\t\t2.0 / ( Math.log( camera.far + 1.0 ) / Math.LN2 ) );\n\n\t\t\t}\n\n\t\t\tif ( _currentCamera !== camera ) {\n\n\t\t\t\t_currentCamera = camera;\n\n\t\t\t\t// lighting uniforms depend on the camera so enforce an update\n\t\t\t\t// now, in case this material supports lights - or later, when\n\t\t\t\t// the next material that does gets activated:\n\n\t\t\t\trefreshMaterial = true;\t\t// set to true on material change\n\t\t\t\trefreshLights = true;\t\t// remains set until update done\n\n\t\t\t}\n\n\t\t\t// load material specific uniforms\n\t\t\t// (shader material also gets them for the sake of genericity)\n\n\t\t\tif ( material.isShaderMaterial ||\n\t\t\t\tmaterial.isMeshPhongMaterial ||\n\t\t\t\tmaterial.isMeshToonMaterial ||\n\t\t\t\tmaterial.isMeshStandardMaterial ||\n\t\t\t\tmaterial.envMap ) {\n\n\t\t\t\tconst uCamPos = p_uniforms.map.cameraPosition;\n\n\t\t\t\tif ( uCamPos !== undefined ) {\n\n\t\t\t\t\tuCamPos.setValue( _gl,\n\t\t\t\t\t\t_vector3.setFromMatrixPosition( camera.matrixWorld ) );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tif ( material.isMeshPhongMaterial ||\n\t\t\t\tmaterial.isMeshToonMaterial ||\n\t\t\t\tmaterial.isMeshLambertMaterial ||\n\t\t\t\tmaterial.isMeshBasicMaterial ||\n\t\t\t\tmaterial.isMeshStandardMaterial ||\n\t\t\t\tmaterial.isShaderMaterial ) {\n\n\t\t\t\tp_uniforms.setValue( _gl, 'isOrthographic', camera.isOrthographicCamera === true );\n\n\t\t\t}\n\n\t\t\tif ( material.isMeshPhongMaterial ||\n\t\t\t\tmaterial.isMeshToonMaterial ||\n\t\t\t\tmaterial.isMeshLambertMaterial ||\n\t\t\t\tmaterial.isMeshBasicMaterial ||\n\t\t\t\tmaterial.isMeshStandardMaterial ||\n\t\t\t\tmaterial.isShaderMaterial ||\n\t\t\t\tmaterial.isShadowMaterial ||\n\t\t\t\tmaterial.skinning ) {\n\n\t\t\t\tp_uniforms.setValue( _gl, 'viewMatrix', camera.matrixWorldInverse );\n\n\t\t\t}\n\n\t\t}\n\n\t\t// skinning uniforms must be set even if material didn't change\n\t\t// auto-setting of texture unit for bone texture must go before other textures\n\t\t// otherwise textures used for skinning can take over texture units reserved for other material textures\n\n\t\tif ( material.skinning ) {\n\n\t\t\tp_uniforms.setOptional( _gl, object, 'bindMatrix' );\n\t\t\tp_uniforms.setOptional( _gl, object, 'bindMatrixInverse' );\n\n\t\t\tconst skeleton = object.skeleton;\n\n\t\t\tif ( skeleton ) {\n\n\t\t\t\tconst bones = skeleton.bones;\n\n\t\t\t\tif ( capabilities.floatVertexTextures ) {\n\n\t\t\t\t\tif ( skeleton.boneTexture === null ) {\n\n\t\t\t\t\t\t// layout (1 matrix = 4 pixels)\n\t\t\t\t\t\t//      RGBA RGBA RGBA RGBA (=> column1, column2, column3, column4)\n\t\t\t\t\t\t//  with  8x8  pixel texture max   16 bones * 4 pixels =  (8 * 8)\n\t\t\t\t\t\t//       16x16 pixel texture max   64 bones * 4 pixels = (16 * 16)\n\t\t\t\t\t\t//       32x32 pixel texture max  256 bones * 4 pixels = (32 * 32)\n\t\t\t\t\t\t//       64x64 pixel texture max 1024 bones * 4 pixels = (64 * 64)\n\n\n\t\t\t\t\t\tlet size = Math.sqrt( bones.length * 4 ); // 4 pixels needed for 1 matrix\n\t\t\t\t\t\tsize = MathUtils.ceilPowerOfTwo( size );\n\t\t\t\t\t\tsize = Math.max( size, 4 );\n\n\t\t\t\t\t\tconst boneMatrices = new Float32Array( size * size * 4 ); // 4 floats per RGBA pixel\n\t\t\t\t\t\tboneMatrices.set( skeleton.boneMatrices ); // copy current values\n\n\t\t\t\t\t\tconst boneTexture = new DataTexture( boneMatrices, size, size, RGBAFormat, FloatType );\n\n\t\t\t\t\t\tskeleton.boneMatrices = boneMatrices;\n\t\t\t\t\t\tskeleton.boneTexture = boneTexture;\n\t\t\t\t\t\tskeleton.boneTextureSize = size;\n\n\t\t\t\t\t}\n\n\t\t\t\t\tp_uniforms.setValue( _gl, 'boneTexture', skeleton.boneTexture, textures );\n\t\t\t\t\tp_uniforms.setValue( _gl, 'boneTextureSize', skeleton.boneTextureSize );\n\n\t\t\t\t} else {\n\n\t\t\t\t\tp_uniforms.setOptional( _gl, skeleton, 'boneMatrices' );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( refreshMaterial || materialProperties.receiveShadow !== object.receiveShadow ) {\n\n\t\t\tmaterialProperties.receiveShadow = object.receiveShadow;\n\t\t\tp_uniforms.setValue( _gl, 'receiveShadow', object.receiveShadow );\n\n\t\t}\n\n\t\tif ( refreshMaterial ) {\n\n\t\t\tp_uniforms.setValue( _gl, 'toneMappingExposure', _this.toneMappingExposure );\n\n\t\t\tif ( materialProperties.needsLights ) {\n\n\t\t\t\t// the current material requires lighting info\n\n\t\t\t\t// note: all lighting uniforms are always set correctly\n\t\t\t\t// they simply reference the renderer's state for their\n\t\t\t\t// values\n\t\t\t\t//\n\t\t\t\t// use the current material's .needsUpdate flags to set\n\t\t\t\t// the GL state when required\n\n\t\t\t\tmarkUniformsLightsNeedsUpdate( m_uniforms, refreshLights );\n\n\t\t\t}\n\n\t\t\t// refresh uniforms common to several materials\n\n\t\t\tif ( fog && material.fog ) {\n\n\t\t\t\tmaterials.refreshFogUniforms( m_uniforms, fog );\n\n\t\t\t}\n\n\t\t\tmaterials.refreshMaterialUniforms( m_uniforms, material, _pixelRatio, _height );\n\n\t\t\tWebGLUniforms.upload( _gl, materialProperties.uniformsList, m_uniforms, textures );\n\n\t\t}\n\n\t\tif ( material.isShaderMaterial && material.uniformsNeedUpdate === true ) {\n\n\t\t\tWebGLUniforms.upload( _gl, materialProperties.uniformsList, m_uniforms, textures );\n\t\t\tmaterial.uniformsNeedUpdate = false;\n\n\t\t}\n\n\t\tif ( material.isSpriteMaterial ) {\n\n\t\t\tp_uniforms.setValue( _gl, 'center', object.center );\n\n\t\t}\n\n\t\t// common matrices\n\n\t\tp_uniforms.setValue( _gl, 'modelViewMatrix', object.modelViewMatrix );\n\t\tp_uniforms.setValue( _gl, 'normalMatrix', object.normalMatrix );\n\t\tp_uniforms.setValue( _gl, 'modelMatrix', object.matrixWorld );\n\n\t\treturn program;\n\n\t}\n\n\t// If uniforms are marked as clean, they don't need to be loaded to the GPU.\n\n\tfunction markUniformsLightsNeedsUpdate( uniforms, value ) {\n\n\t\tuniforms.ambientLightColor.needsUpdate = value;\n\t\tuniforms.lightProbe.needsUpdate = value;\n\n\t\tuniforms.directionalLights.needsUpdate = value;\n\t\tuniforms.directionalLightShadows.needsUpdate = value;\n\t\tuniforms.pointLights.needsUpdate = value;\n\t\tuniforms.pointLightShadows.needsUpdate = value;\n\t\tuniforms.spotLights.needsUpdate = value;\n\t\tuniforms.spotLightShadows.needsUpdate = value;\n\t\tuniforms.rectAreaLights.needsUpdate = value;\n\t\tuniforms.hemisphereLights.needsUpdate = value;\n\n\t}\n\n\tfunction materialNeedsLights( material ) {\n\n\t\treturn material.isMeshLambertMaterial || material.isMeshToonMaterial || material.isMeshPhongMaterial ||\n\t\t\tmaterial.isMeshStandardMaterial || material.isShadowMaterial ||\n\t\t\t( material.isShaderMaterial && material.lights === true );\n\n\t}\n\n\t//\n\tthis.setFramebuffer = function ( value ) {\n\n\t\tif ( _framebuffer !== value && _currentRenderTarget === null ) _gl.bindFramebuffer( 36160, value );\n\n\t\t_framebuffer = value;\n\n\t};\n\n\tthis.getActiveCubeFace = function () {\n\n\t\treturn _currentActiveCubeFace;\n\n\t};\n\n\tthis.getActiveMipmapLevel = function () {\n\n\t\treturn _currentActiveMipmapLevel;\n\n\t};\n\n\tthis.getRenderList = function () {\n\n\t\treturn currentRenderList;\n\n\t};\n\n\tthis.setRenderList = function ( renderList ) {\n\n\t\tcurrentRenderList = renderList;\n\n\t};\n\n\tthis.getRenderTarget = function () {\n\n\t\treturn _currentRenderTarget;\n\n\t};\n\n\tthis.setRenderTarget = function ( renderTarget, activeCubeFace = 0, activeMipmapLevel = 0 ) {\n\n\t\t_currentRenderTarget = renderTarget;\n\t\t_currentActiveCubeFace = activeCubeFace;\n\t\t_currentActiveMipmapLevel = activeMipmapLevel;\n\n\t\tif ( renderTarget && properties.get( renderTarget ).__webglFramebuffer === undefined ) {\n\n\t\t\ttextures.setupRenderTarget( renderTarget );\n\n\t\t}\n\n\t\tlet framebuffer = _framebuffer;\n\t\tlet isCube = false;\n\n\t\tif ( renderTarget ) {\n\n\t\t\tconst __webglFramebuffer = properties.get( renderTarget ).__webglFramebuffer;\n\n\t\t\tif ( renderTarget.isWebGLCubeRenderTarget ) {\n\n\t\t\t\tframebuffer = __webglFramebuffer[ activeCubeFace ];\n\t\t\t\tisCube = true;\n\n\t\t\t} else if ( renderTarget.isWebGLMultisampleRenderTarget ) {\n\n\t\t\t\tframebuffer = properties.get( renderTarget ).__webglMultisampledFramebuffer;\n\n\t\t\t} else {\n\n\t\t\t\tframebuffer = __webglFramebuffer;\n\n\t\t\t}\n\n\t\t\t_currentViewport.copy( renderTarget.viewport );\n\t\t\t_currentScissor.copy( renderTarget.scissor );\n\t\t\t_currentScissorTest = renderTarget.scissorTest;\n\n\t\t} else {\n\n\t\t\t_currentViewport.copy( _viewport ).multiplyScalar( _pixelRatio ).floor();\n\t\t\t_currentScissor.copy( _scissor ).multiplyScalar( _pixelRatio ).floor();\n\t\t\t_currentScissorTest = _scissorTest;\n\n\t\t}\n\n\t\tif ( _currentFramebuffer !== framebuffer ) {\n\n\t\t\t_gl.bindFramebuffer( 36160, framebuffer );\n\t\t\t_currentFramebuffer = framebuffer;\n\n\t\t}\n\n\t\tstate.viewport( _currentViewport );\n\t\tstate.scissor( _currentScissor );\n\t\tstate.setScissorTest( _currentScissorTest );\n\n\t\tif ( isCube ) {\n\n\t\t\tconst textureProperties = properties.get( renderTarget.texture );\n\t\t\t_gl.framebufferTexture2D( 36160, 36064, 34069 + activeCubeFace, textureProperties.__webglTexture, activeMipmapLevel );\n\n\t\t}\n\n\t};\n\n\tthis.readRenderTargetPixels = function ( renderTarget, x, y, width, height, buffer, activeCubeFaceIndex ) {\n\n\t\tif ( ! ( renderTarget && renderTarget.isWebGLRenderTarget ) ) {\n\n\t\t\tconsole.error( 'THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not THREE.WebGLRenderTarget.' );\n\t\t\treturn;\n\n\t\t}\n\n\t\tlet framebuffer = properties.get( renderTarget ).__webglFramebuffer;\n\n\t\tif ( renderTarget.isWebGLCubeRenderTarget && activeCubeFaceIndex !== undefined ) {\n\n\t\t\tframebuffer = framebuffer[ activeCubeFaceIndex ];\n\n\t\t}\n\n\t\tif ( framebuffer ) {\n\n\t\t\tlet restore = false;\n\n\t\t\tif ( framebuffer !== _currentFramebuffer ) {\n\n\t\t\t\t_gl.bindFramebuffer( 36160, framebuffer );\n\n\t\t\t\trestore = true;\n\n\t\t\t}\n\n\t\t\ttry {\n\n\t\t\t\tconst texture = renderTarget.texture;\n\t\t\t\tconst textureFormat = texture.format;\n\t\t\t\tconst textureType = texture.type;\n\n\t\t\t\tif ( textureFormat !== RGBAFormat && utils.convert( textureFormat ) !== _gl.getParameter( 35739 ) ) {\n\n\t\t\t\t\tconsole.error( 'THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not in RGBA or implementation defined format.' );\n\t\t\t\t\treturn;\n\n\t\t\t\t}\n\n\t\t\t\tconst halfFloatSupportedByExt = ( textureType === HalfFloatType ) && ( extensions.has( 'EXT_color_buffer_half_float' ) || ( capabilities.isWebGL2 && extensions.has( 'EXT_color_buffer_float' ) ) );\n\n\t\t\t\tif ( textureType !== UnsignedByteType && utils.convert( textureType ) !== _gl.getParameter( 35738 ) && // IE11, Edge and Chrome Mac < 52 (#9513)\n\t\t\t\t\t! ( textureType === FloatType && ( capabilities.isWebGL2 || extensions.has( 'OES_texture_float' ) || extensions.has( 'WEBGL_color_buffer_float' ) ) ) && // Chrome Mac >= 52 and Firefox\n\t\t\t\t\t! halfFloatSupportedByExt ) {\n\n\t\t\t\t\tconsole.error( 'THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not in UnsignedByteType or implementation defined type.' );\n\t\t\t\t\treturn;\n\n\t\t\t\t}\n\n\t\t\t\tif ( _gl.checkFramebufferStatus( 36160 ) === 36053 ) {\n\n\t\t\t\t\t// the following if statement ensures valid read requests (no out-of-bounds pixels, see #8604)\n\n\t\t\t\t\tif ( ( x >= 0 && x <= ( renderTarget.width - width ) ) && ( y >= 0 && y <= ( renderTarget.height - height ) ) ) {\n\n\t\t\t\t\t\t_gl.readPixels( x, y, width, height, utils.convert( textureFormat ), utils.convert( textureType ), buffer );\n\n\t\t\t\t\t}\n\n\t\t\t\t} else {\n\n\t\t\t\t\tconsole.error( 'THREE.WebGLRenderer.readRenderTargetPixels: readPixels from renderTarget failed. Framebuffer not complete.' );\n\n\t\t\t\t}\n\n\t\t\t} finally {\n\n\t\t\t\tif ( restore ) {\n\n\t\t\t\t\t_gl.bindFramebuffer( 36160, _currentFramebuffer );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t};\n\n\tthis.copyFramebufferToTexture = function ( position, texture, level = 0 ) {\n\n\t\tconst levelScale = Math.pow( 2, - level );\n\t\tconst width = Math.floor( texture.image.width * levelScale );\n\t\tconst height = Math.floor( texture.image.height * levelScale );\n\t\tconst glFormat = utils.convert( texture.format );\n\n\t\ttextures.setTexture2D( texture, 0 );\n\n\t\t_gl.copyTexImage2D( 3553, level, glFormat, position.x, position.y, width, height, 0 );\n\n\t\tstate.unbindTexture();\n\n\t};\n\n\tthis.copyTextureToTexture = function ( position, srcTexture, dstTexture, level = 0 ) {\n\n\t\tconst width = srcTexture.image.width;\n\t\tconst height = srcTexture.image.height;\n\t\tconst glFormat = utils.convert( dstTexture.format );\n\t\tconst glType = utils.convert( dstTexture.type );\n\n\t\ttextures.setTexture2D( dstTexture, 0 );\n\n\t\t// As another texture upload may have changed pixelStorei\n\t\t// parameters, make sure they are correct for the dstTexture\n\t\t_gl.pixelStorei( 37440, dstTexture.flipY );\n\t\t_gl.pixelStorei( 37441, dstTexture.premultiplyAlpha );\n\t\t_gl.pixelStorei( 3317, dstTexture.unpackAlignment );\n\n\t\tif ( srcTexture.isDataTexture ) {\n\n\t\t\t_gl.texSubImage2D( 3553, level, position.x, position.y, width, height, glFormat, glType, srcTexture.image.data );\n\n\t\t} else {\n\n\t\t\tif ( srcTexture.isCompressedTexture ) {\n\n\t\t\t\t_gl.compressedTexSubImage2D( 3553, level, position.x, position.y, srcTexture.mipmaps[ 0 ].width, srcTexture.mipmaps[ 0 ].height, glFormat, srcTexture.mipmaps[ 0 ].data );\n\n\t\t\t} else {\n\n\t\t\t\t_gl.texSubImage2D( 3553, level, position.x, position.y, glFormat, glType, srcTexture.image );\n\n\t\t\t}\n\n\t\t}\n\n\t\t// Generate mipmaps only when copying level 0\n\t\tif ( level === 0 && dstTexture.generateMipmaps ) _gl.generateMipmap( 3553 );\n\n\t\tstate.unbindTexture();\n\n\t};\n\n\tthis.initTexture = function ( texture ) {\n\n\t\ttextures.setTexture2D( texture, 0 );\n\n\t\tstate.unbindTexture();\n\n\t};\n\n\tthis.resetState = function () {\n\n\t\tstate.reset();\n\t\tbindingStates.reset();\n\n\t};\n\n\tif ( typeof __THREE_DEVTOOLS__ !== 'undefined' ) {\n\n\t\t__THREE_DEVTOOLS__.dispatchEvent( new CustomEvent( 'observe', { detail: this } ) ); // eslint-disable-line no-undef\n\n\t}\n\n}\n\nfunction WebGL1Renderer( parameters ) {\n\n\tWebGLRenderer.call( this, parameters );\n\n}\n\nWebGL1Renderer.prototype = Object.assign( Object.create( WebGLRenderer.prototype ), {\n\n\tconstructor: WebGL1Renderer,\n\n\tisWebGL1Renderer: true\n\n} );\n\nclass FogExp2 {\n\n\tconstructor( color, density ) {\n\n\t\tObject.defineProperty( this, 'isFogExp2', { value: true } );\n\n\t\tthis.name = '';\n\n\t\tthis.color = new Color( color );\n\t\tthis.density = ( density !== undefined ) ? density : 0.00025;\n\n\t}\n\n\tclone() {\n\n\t\treturn new FogExp2( this.color, this.density );\n\n\t}\n\n\ttoJSON( /* meta */ ) {\n\n\t\treturn {\n\t\t\ttype: 'FogExp2',\n\t\t\tcolor: this.color.getHex(),\n\t\t\tdensity: this.density\n\t\t};\n\n\t}\n\n}\n\nclass Fog {\n\n\tconstructor( color, near, far ) {\n\n\t\tObject.defineProperty( this, 'isFog', { value: true } );\n\n\t\tthis.name = '';\n\n\t\tthis.color = new Color( color );\n\n\t\tthis.near = ( near !== undefined ) ? near : 1;\n\t\tthis.far = ( far !== undefined ) ? far : 1000;\n\n\t}\n\n\tclone() {\n\n\t\treturn new Fog( this.color, this.near, this.far );\n\n\t}\n\n\ttoJSON( /* meta */ ) {\n\n\t\treturn {\n\t\t\ttype: 'Fog',\n\t\t\tcolor: this.color.getHex(),\n\t\t\tnear: this.near,\n\t\t\tfar: this.far\n\t\t};\n\n\t}\n\n}\n\nclass Scene extends Object3D {\n\n\tconstructor() {\n\n\t\tsuper();\n\n\t\tObject.defineProperty( this, 'isScene', { value: true } );\n\n\t\tthis.type = 'Scene';\n\n\t\tthis.background = null;\n\t\tthis.environment = null;\n\t\tthis.fog = null;\n\n\t\tthis.overrideMaterial = null;\n\n\t\tthis.autoUpdate = true; // checked by the renderer\n\n\t\tif ( typeof __THREE_DEVTOOLS__ !== 'undefined' ) {\n\n\t\t\t__THREE_DEVTOOLS__.dispatchEvent( new CustomEvent( 'observe', { detail: this } ) ); // eslint-disable-line no-undef\n\n\t\t}\n\n\t}\n\n\tcopy( source, recursive ) {\n\n\t\tsuper.copy( source, recursive );\n\n\t\tif ( source.background !== null ) this.background = source.background.clone();\n\t\tif ( source.environment !== null ) this.environment = source.environment.clone();\n\t\tif ( source.fog !== null ) this.fog = source.fog.clone();\n\n\t\tif ( source.overrideMaterial !== null ) this.overrideMaterial = source.overrideMaterial.clone();\n\n\t\tthis.autoUpdate = source.autoUpdate;\n\t\tthis.matrixAutoUpdate = source.matrixAutoUpdate;\n\n\t\treturn this;\n\n\t}\n\n\ttoJSON( meta ) {\n\n\t\tconst data = super.toJSON( meta );\n\n\t\tif ( this.background !== null ) data.object.background = this.background.toJSON( meta );\n\t\tif ( this.environment !== null ) data.object.environment = this.environment.toJSON( meta );\n\t\tif ( this.fog !== null ) data.object.fog = this.fog.toJSON();\n\n\t\treturn data;\n\n\t}\n\n}\n\nfunction InterleavedBuffer( array, stride ) {\n\n\tthis.array = array;\n\tthis.stride = stride;\n\tthis.count = array !== undefined ? array.length / stride : 0;\n\n\tthis.usage = StaticDrawUsage;\n\tthis.updateRange = { offset: 0, count: - 1 };\n\n\tthis.version = 0;\n\n\tthis.uuid = MathUtils.generateUUID();\n\n}\n\nObject.defineProperty( InterleavedBuffer.prototype, 'needsUpdate', {\n\n\tset: function ( value ) {\n\n\t\tif ( value === true ) this.version ++;\n\n\t}\n\n} );\n\nObject.assign( InterleavedBuffer.prototype, {\n\n\tisInterleavedBuffer: true,\n\n\tonUploadCallback: function () {},\n\n\tsetUsage: function ( value ) {\n\n\t\tthis.usage = value;\n\n\t\treturn this;\n\n\t},\n\n\tcopy: function ( source ) {\n\n\t\tthis.array = new source.array.constructor( source.array );\n\t\tthis.count = source.count;\n\t\tthis.stride = source.stride;\n\t\tthis.usage = source.usage;\n\n\t\treturn this;\n\n\t},\n\n\tcopyAt: function ( index1, attribute, index2 ) {\n\n\t\tindex1 *= this.stride;\n\t\tindex2 *= attribute.stride;\n\n\t\tfor ( let i = 0, l = this.stride; i < l; i ++ ) {\n\n\t\t\tthis.array[ index1 + i ] = attribute.array[ index2 + i ];\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tset: function ( value, offset = 0 ) {\n\n\t\tthis.array.set( value, offset );\n\n\t\treturn this;\n\n\t},\n\n\tclone: function ( data ) {\n\n\t\tif ( data.arrayBuffers === undefined ) {\n\n\t\t\tdata.arrayBuffers = {};\n\n\t\t}\n\n\t\tif ( this.array.buffer._uuid === undefined ) {\n\n\t\t\tthis.array.buffer._uuid = MathUtils.generateUUID();\n\n\t\t}\n\n\t\tif ( data.arrayBuffers[ this.array.buffer._uuid ] === undefined ) {\n\n\t\t\tdata.arrayBuffers[ this.array.buffer._uuid ] = this.array.slice( 0 ).buffer;\n\n\t\t}\n\n\t\tconst array = new this.array.constructor( data.arrayBuffers[ this.array.buffer._uuid ] );\n\n\t\tconst ib = new InterleavedBuffer( array, this.stride );\n\t\tib.setUsage( this.usage );\n\n\t\treturn ib;\n\n\t},\n\n\tonUpload: function ( callback ) {\n\n\t\tthis.onUploadCallback = callback;\n\n\t\treturn this;\n\n\t},\n\n\ttoJSON: function ( data ) {\n\n\t\tif ( data.arrayBuffers === undefined ) {\n\n\t\t\tdata.arrayBuffers = {};\n\n\t\t}\n\n\t\t// generate UUID for array buffer if necessary\n\n\t\tif ( this.array.buffer._uuid === undefined ) {\n\n\t\t\tthis.array.buffer._uuid = MathUtils.generateUUID();\n\n\t\t}\n\n\t\tif ( data.arrayBuffers[ this.array.buffer._uuid ] === undefined ) {\n\n\t\t\tdata.arrayBuffers[ this.array.buffer._uuid ] = Array.prototype.slice.call( new Uint32Array( this.array.buffer ) );\n\n\t\t}\n\n\t\t//\n\n\t\treturn {\n\t\t\tuuid: this.uuid,\n\t\t\tbuffer: this.array.buffer._uuid,\n\t\t\ttype: this.array.constructor.name,\n\t\t\tstride: this.stride\n\t\t};\n\n\t}\n\n} );\n\nconst _vector$6 = new Vector3();\n\nfunction InterleavedBufferAttribute( interleavedBuffer, itemSize, offset, normalized ) {\n\n\tthis.name = '';\n\n\tthis.data = interleavedBuffer;\n\tthis.itemSize = itemSize;\n\tthis.offset = offset;\n\n\tthis.normalized = normalized === true;\n\n}\n\nObject.defineProperties( InterleavedBufferAttribute.prototype, {\n\n\tcount: {\n\n\t\tget: function () {\n\n\t\t\treturn this.data.count;\n\n\t\t}\n\n\t},\n\n\tarray: {\n\n\t\tget: function () {\n\n\t\t\treturn this.data.array;\n\n\t\t}\n\n\t},\n\n\tneedsUpdate: {\n\n\t\tset: function ( value ) {\n\n\t\t\tthis.data.needsUpdate = value;\n\n\t\t}\n\n\t}\n\n} );\n\nObject.assign( InterleavedBufferAttribute.prototype, {\n\n\tisInterleavedBufferAttribute: true,\n\n\tapplyMatrix4: function ( m ) {\n\n\t\tfor ( let i = 0, l = this.data.count; i < l; i ++ ) {\n\n\t\t\t_vector$6.x = this.getX( i );\n\t\t\t_vector$6.y = this.getY( i );\n\t\t\t_vector$6.z = this.getZ( i );\n\n\t\t\t_vector$6.applyMatrix4( m );\n\n\t\t\tthis.setXYZ( i, _vector$6.x, _vector$6.y, _vector$6.z );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tsetX: function ( index, x ) {\n\n\t\tthis.data.array[ index * this.data.stride + this.offset ] = x;\n\n\t\treturn this;\n\n\t},\n\n\tsetY: function ( index, y ) {\n\n\t\tthis.data.array[ index * this.data.stride + this.offset + 1 ] = y;\n\n\t\treturn this;\n\n\t},\n\n\tsetZ: function ( index, z ) {\n\n\t\tthis.data.array[ index * this.data.stride + this.offset + 2 ] = z;\n\n\t\treturn this;\n\n\t},\n\n\tsetW: function ( index, w ) {\n\n\t\tthis.data.array[ index * this.data.stride + this.offset + 3 ] = w;\n\n\t\treturn this;\n\n\t},\n\n\tgetX: function ( index ) {\n\n\t\treturn this.data.array[ index * this.data.stride + this.offset ];\n\n\t},\n\n\tgetY: function ( index ) {\n\n\t\treturn this.data.array[ index * this.data.stride + this.offset + 1 ];\n\n\t},\n\n\tgetZ: function ( index ) {\n\n\t\treturn this.data.array[ index * this.data.stride + this.offset + 2 ];\n\n\t},\n\n\tgetW: function ( index ) {\n\n\t\treturn this.data.array[ index * this.data.stride + this.offset + 3 ];\n\n\t},\n\n\tsetXY: function ( index, x, y ) {\n\n\t\tindex = index * this.data.stride + this.offset;\n\n\t\tthis.data.array[ index + 0 ] = x;\n\t\tthis.data.array[ index + 1 ] = y;\n\n\t\treturn this;\n\n\t},\n\n\tsetXYZ: function ( index, x, y, z ) {\n\n\t\tindex = index * this.data.stride + this.offset;\n\n\t\tthis.data.array[ index + 0 ] = x;\n\t\tthis.data.array[ index + 1 ] = y;\n\t\tthis.data.array[ index + 2 ] = z;\n\n\t\treturn this;\n\n\t},\n\n\tsetXYZW: function ( index, x, y, z, w ) {\n\n\t\tindex = index * this.data.stride + this.offset;\n\n\t\tthis.data.array[ index + 0 ] = x;\n\t\tthis.data.array[ index + 1 ] = y;\n\t\tthis.data.array[ index + 2 ] = z;\n\t\tthis.data.array[ index + 3 ] = w;\n\n\t\treturn this;\n\n\t},\n\n\tclone: function ( data ) {\n\n\t\tif ( data === undefined ) {\n\n\t\t\tconsole.log( 'THREE.InterleavedBufferAttribute.clone(): Cloning an interlaved buffer attribute will deinterleave buffer data.' );\n\n\t\t\tconst array = [];\n\n\t\t\tfor ( let i = 0; i < this.count; i ++ ) {\n\n\t\t\t\tconst index = i * this.data.stride + this.offset;\n\n\t\t\t\tfor ( let j = 0; j < this.itemSize; j ++ ) {\n\n\t\t\t\t\tarray.push( this.data.array[ index + j ] );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\treturn new BufferAttribute( new this.array.constructor( array ), this.itemSize, this.normalized );\n\n\t\t} else {\n\n\t\t\tif ( data.interleavedBuffers === undefined ) {\n\n\t\t\t\tdata.interleavedBuffers = {};\n\n\t\t\t}\n\n\t\t\tif ( data.interleavedBuffers[ this.data.uuid ] === undefined ) {\n\n\t\t\t\tdata.interleavedBuffers[ this.data.uuid ] = this.data.clone( data );\n\n\t\t\t}\n\n\t\t\treturn new InterleavedBufferAttribute( data.interleavedBuffers[ this.data.uuid ], this.itemSize, this.offset, this.normalized );\n\n\t\t}\n\n\t},\n\n\ttoJSON: function ( data ) {\n\n\t\tif ( data === undefined ) {\n\n\t\t\tconsole.log( 'THREE.InterleavedBufferAttribute.toJSON(): Serializing an interlaved buffer attribute will deinterleave buffer data.' );\n\n\t\t\tconst array = [];\n\n\t\t\tfor ( let i = 0; i < this.count; i ++ ) {\n\n\t\t\t\tconst index = i * this.data.stride + this.offset;\n\n\t\t\t\tfor ( let j = 0; j < this.itemSize; j ++ ) {\n\n\t\t\t\t\tarray.push( this.data.array[ index + j ] );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\t// deinterleave data and save it as an ordinary buffer attribute for now\n\n\t\t\treturn {\n\t\t\t\titemSize: this.itemSize,\n\t\t\t\ttype: this.array.constructor.name,\n\t\t\t\tarray: array,\n\t\t\t\tnormalized: this.normalized\n\t\t\t};\n\n\t\t} else {\n\n\t\t\t// save as true interlaved attribtue\n\n\t\t\tif ( data.interleavedBuffers === undefined ) {\n\n\t\t\t\tdata.interleavedBuffers = {};\n\n\t\t\t}\n\n\t\t\tif ( data.interleavedBuffers[ this.data.uuid ] === undefined ) {\n\n\t\t\t\tdata.interleavedBuffers[ this.data.uuid ] = this.data.toJSON( data );\n\n\t\t\t}\n\n\t\t\treturn {\n\t\t\t\tisInterleavedBufferAttribute: true,\n\t\t\t\titemSize: this.itemSize,\n\t\t\t\tdata: this.data.uuid,\n\t\t\t\toffset: this.offset,\n\t\t\t\tnormalized: this.normalized\n\t\t\t};\n\n\t\t}\n\n\t}\n\n} );\n\n/**\n * parameters = {\n *  color: <hex>,\n *  map: new THREE.Texture( <Image> ),\n *  alphaMap: new THREE.Texture( <Image> ),\n *  rotation: <float>,\n *  sizeAttenuation: <bool>\n * }\n */\n\nfunction SpriteMaterial( parameters ) {\n\n\tMaterial.call( this );\n\n\tthis.type = 'SpriteMaterial';\n\n\tthis.color = new Color( 0xffffff );\n\n\tthis.map = null;\n\n\tthis.alphaMap = null;\n\n\tthis.rotation = 0;\n\n\tthis.sizeAttenuation = true;\n\n\tthis.transparent = true;\n\n\tthis.setValues( parameters );\n\n}\n\nSpriteMaterial.prototype = Object.create( Material.prototype );\nSpriteMaterial.prototype.constructor = SpriteMaterial;\nSpriteMaterial.prototype.isSpriteMaterial = true;\n\nSpriteMaterial.prototype.copy = function ( source ) {\n\n\tMaterial.prototype.copy.call( this, source );\n\n\tthis.color.copy( source.color );\n\n\tthis.map = source.map;\n\n\tthis.alphaMap = source.alphaMap;\n\n\tthis.rotation = source.rotation;\n\n\tthis.sizeAttenuation = source.sizeAttenuation;\n\n\treturn this;\n\n};\n\nlet _geometry;\n\nconst _intersectPoint = new Vector3();\nconst _worldScale = new Vector3();\nconst _mvPosition = new Vector3();\n\nconst _alignedPosition = new Vector2();\nconst _rotatedPosition = new Vector2();\nconst _viewWorldMatrix = new Matrix4();\n\nconst _vA$1 = new Vector3();\nconst _vB$1 = new Vector3();\nconst _vC$1 = new Vector3();\n\nconst _uvA$1 = new Vector2();\nconst _uvB$1 = new Vector2();\nconst _uvC$1 = new Vector2();\n\nfunction Sprite( material ) {\n\n\tObject3D.call( this );\n\n\tthis.type = 'Sprite';\n\n\tif ( _geometry === undefined ) {\n\n\t\t_geometry = new BufferGeometry();\n\n\t\tconst float32Array = new Float32Array( [\n\t\t\t- 0.5, - 0.5, 0, 0, 0,\n\t\t\t0.5, - 0.5, 0, 1, 0,\n\t\t\t0.5, 0.5, 0, 1, 1,\n\t\t\t- 0.5, 0.5, 0, 0, 1\n\t\t] );\n\n\t\tconst interleavedBuffer = new InterleavedBuffer( float32Array, 5 );\n\n\t\t_geometry.setIndex( [ 0, 1, 2,\t0, 2, 3 ] );\n\t\t_geometry.setAttribute( 'position', new InterleavedBufferAttribute( interleavedBuffer, 3, 0, false ) );\n\t\t_geometry.setAttribute( 'uv', new InterleavedBufferAttribute( interleavedBuffer, 2, 3, false ) );\n\n\t}\n\n\tthis.geometry = _geometry;\n\tthis.material = ( material !== undefined ) ? material : new SpriteMaterial();\n\n\tthis.center = new Vector2( 0.5, 0.5 );\n\n}\n\nSprite.prototype = Object.assign( Object.create( Object3D.prototype ), {\n\n\tconstructor: Sprite,\n\n\tisSprite: true,\n\n\traycast: function ( raycaster, intersects ) {\n\n\t\tif ( raycaster.camera === null ) {\n\n\t\t\tconsole.error( 'THREE.Sprite: \"Raycaster.camera\" needs to be set in order to raycast against sprites.' );\n\n\t\t}\n\n\t\t_worldScale.setFromMatrixScale( this.matrixWorld );\n\n\t\t_viewWorldMatrix.copy( raycaster.camera.matrixWorld );\n\t\tthis.modelViewMatrix.multiplyMatrices( raycaster.camera.matrixWorldInverse, this.matrixWorld );\n\n\t\t_mvPosition.setFromMatrixPosition( this.modelViewMatrix );\n\n\t\tif ( raycaster.camera.isPerspectiveCamera && this.material.sizeAttenuation === false ) {\n\n\t\t\t_worldScale.multiplyScalar( - _mvPosition.z );\n\n\t\t}\n\n\t\tconst rotation = this.material.rotation;\n\t\tlet sin, cos;\n\n\t\tif ( rotation !== 0 ) {\n\n\t\t\tcos = Math.cos( rotation );\n\t\t\tsin = Math.sin( rotation );\n\n\t\t}\n\n\t\tconst center = this.center;\n\n\t\ttransformVertex( _vA$1.set( - 0.5, - 0.5, 0 ), _mvPosition, center, _worldScale, sin, cos );\n\t\ttransformVertex( _vB$1.set( 0.5, - 0.5, 0 ), _mvPosition, center, _worldScale, sin, cos );\n\t\ttransformVertex( _vC$1.set( 0.5, 0.5, 0 ), _mvPosition, center, _worldScale, sin, cos );\n\n\t\t_uvA$1.set( 0, 0 );\n\t\t_uvB$1.set( 1, 0 );\n\t\t_uvC$1.set( 1, 1 );\n\n\t\t// check first triangle\n\t\tlet intersect = raycaster.ray.intersectTriangle( _vA$1, _vB$1, _vC$1, false, _intersectPoint );\n\n\t\tif ( intersect === null ) {\n\n\t\t\t// check second triangle\n\t\t\ttransformVertex( _vB$1.set( - 0.5, 0.5, 0 ), _mvPosition, center, _worldScale, sin, cos );\n\t\t\t_uvB$1.set( 0, 1 );\n\n\t\t\tintersect = raycaster.ray.intersectTriangle( _vA$1, _vC$1, _vB$1, false, _intersectPoint );\n\t\t\tif ( intersect === null ) {\n\n\t\t\t\treturn;\n\n\t\t\t}\n\n\t\t}\n\n\t\tconst distance = raycaster.ray.origin.distanceTo( _intersectPoint );\n\n\t\tif ( distance < raycaster.near || distance > raycaster.far ) return;\n\n\t\tintersects.push( {\n\n\t\t\tdistance: distance,\n\t\t\tpoint: _intersectPoint.clone(),\n\t\t\tuv: Triangle.getUV( _intersectPoint, _vA$1, _vB$1, _vC$1, _uvA$1, _uvB$1, _uvC$1, new Vector2() ),\n\t\t\tface: null,\n\t\t\tobject: this\n\n\t\t} );\n\n\t},\n\n\tcopy: function ( source ) {\n\n\t\tObject3D.prototype.copy.call( this, source );\n\n\t\tif ( source.center !== undefined ) this.center.copy( source.center );\n\n\t\tthis.material = source.material;\n\n\t\treturn this;\n\n\t}\n\n} );\n\nfunction transformVertex( vertexPosition, mvPosition, center, scale, sin, cos ) {\n\n\t// compute position in camera space\n\t_alignedPosition.subVectors( vertexPosition, center ).addScalar( 0.5 ).multiply( scale );\n\n\t// to check if rotation is not zero\n\tif ( sin !== undefined ) {\n\n\t\t_rotatedPosition.x = ( cos * _alignedPosition.x ) - ( sin * _alignedPosition.y );\n\t\t_rotatedPosition.y = ( sin * _alignedPosition.x ) + ( cos * _alignedPosition.y );\n\n\t} else {\n\n\t\t_rotatedPosition.copy( _alignedPosition );\n\n\t}\n\n\n\tvertexPosition.copy( mvPosition );\n\tvertexPosition.x += _rotatedPosition.x;\n\tvertexPosition.y += _rotatedPosition.y;\n\n\t// transform to world space\n\tvertexPosition.applyMatrix4( _viewWorldMatrix );\n\n}\n\nconst _v1$4 = new Vector3();\nconst _v2$2 = new Vector3();\n\nfunction LOD() {\n\n\tObject3D.call( this );\n\n\tthis._currentLevel = 0;\n\n\tthis.type = 'LOD';\n\n\tObject.defineProperties( this, {\n\t\tlevels: {\n\t\t\tenumerable: true,\n\t\t\tvalue: []\n\t\t}\n\t} );\n\n\tthis.autoUpdate = true;\n\n}\n\nLOD.prototype = Object.assign( Object.create( Object3D.prototype ), {\n\n\tconstructor: LOD,\n\n\tisLOD: true,\n\n\tcopy: function ( source ) {\n\n\t\tObject3D.prototype.copy.call( this, source, false );\n\n\t\tconst levels = source.levels;\n\n\t\tfor ( let i = 0, l = levels.length; i < l; i ++ ) {\n\n\t\t\tconst level = levels[ i ];\n\n\t\t\tthis.addLevel( level.object.clone(), level.distance );\n\n\t\t}\n\n\t\tthis.autoUpdate = source.autoUpdate;\n\n\t\treturn this;\n\n\t},\n\n\taddLevel: function ( object, distance = 0 ) {\n\n\t\tdistance = Math.abs( distance );\n\n\t\tconst levels = this.levels;\n\n\t\tlet l;\n\n\t\tfor ( l = 0; l < levels.length; l ++ ) {\n\n\t\t\tif ( distance < levels[ l ].distance ) {\n\n\t\t\t\tbreak;\n\n\t\t\t}\n\n\t\t}\n\n\t\tlevels.splice( l, 0, { distance: distance, object: object } );\n\n\t\tthis.add( object );\n\n\t\treturn this;\n\n\t},\n\n\tgetCurrentLevel: function () {\n\n\t\treturn this._currentLevel;\n\n\t},\n\n\tgetObjectForDistance: function ( distance ) {\n\n\t\tconst levels = this.levels;\n\n\t\tif ( levels.length > 0 ) {\n\n\t\t\tlet i, l;\n\n\t\t\tfor ( i = 1, l = levels.length; i < l; i ++ ) {\n\n\t\t\t\tif ( distance < levels[ i ].distance ) {\n\n\t\t\t\t\tbreak;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\treturn levels[ i - 1 ].object;\n\n\t\t}\n\n\t\treturn null;\n\n\t},\n\n\traycast: function ( raycaster, intersects ) {\n\n\t\tconst levels = this.levels;\n\n\t\tif ( levels.length > 0 ) {\n\n\t\t\t_v1$4.setFromMatrixPosition( this.matrixWorld );\n\n\t\t\tconst distance = raycaster.ray.origin.distanceTo( _v1$4 );\n\n\t\t\tthis.getObjectForDistance( distance ).raycast( raycaster, intersects );\n\n\t\t}\n\n\t},\n\n\tupdate: function ( camera ) {\n\n\t\tconst levels = this.levels;\n\n\t\tif ( levels.length > 1 ) {\n\n\t\t\t_v1$4.setFromMatrixPosition( camera.matrixWorld );\n\t\t\t_v2$2.setFromMatrixPosition( this.matrixWorld );\n\n\t\t\tconst distance = _v1$4.distanceTo( _v2$2 ) / camera.zoom;\n\n\t\t\tlevels[ 0 ].object.visible = true;\n\n\t\t\tlet i, l;\n\n\t\t\tfor ( i = 1, l = levels.length; i < l; i ++ ) {\n\n\t\t\t\tif ( distance >= levels[ i ].distance ) {\n\n\t\t\t\t\tlevels[ i - 1 ].object.visible = false;\n\t\t\t\t\tlevels[ i ].object.visible = true;\n\n\t\t\t\t} else {\n\n\t\t\t\t\tbreak;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tthis._currentLevel = i - 1;\n\n\t\t\tfor ( ; i < l; i ++ ) {\n\n\t\t\t\tlevels[ i ].object.visible = false;\n\n\t\t\t}\n\n\t\t}\n\n\t},\n\n\ttoJSON: function ( meta ) {\n\n\t\tconst data = Object3D.prototype.toJSON.call( this, meta );\n\n\t\tif ( this.autoUpdate === false ) data.object.autoUpdate = false;\n\n\t\tdata.object.levels = [];\n\n\t\tconst levels = this.levels;\n\n\t\tfor ( let i = 0, l = levels.length; i < l; i ++ ) {\n\n\t\t\tconst level = levels[ i ];\n\n\t\t\tdata.object.levels.push( {\n\t\t\t\tobject: level.object.uuid,\n\t\t\t\tdistance: level.distance\n\t\t\t} );\n\n\t\t}\n\n\t\treturn data;\n\n\t}\n\n} );\n\nconst _basePosition = new Vector3();\n\nconst _skinIndex = new Vector4();\nconst _skinWeight = new Vector4();\n\nconst _vector$7 = new Vector3();\nconst _matrix$1 = new Matrix4();\n\nfunction SkinnedMesh( geometry, material ) {\n\n\tif ( geometry && geometry.isGeometry ) {\n\n\t\tconsole.error( 'THREE.SkinnedMesh no longer supports THREE.Geometry. Use THREE.BufferGeometry instead.' );\n\n\t}\n\n\tMesh.call( this, geometry, material );\n\n\tthis.type = 'SkinnedMesh';\n\n\tthis.bindMode = 'attached';\n\tthis.bindMatrix = new Matrix4();\n\tthis.bindMatrixInverse = new Matrix4();\n\n}\n\nSkinnedMesh.prototype = Object.assign( Object.create( Mesh.prototype ), {\n\n\tconstructor: SkinnedMesh,\n\n\tisSkinnedMesh: true,\n\n\tcopy: function ( source ) {\n\n\t\tMesh.prototype.copy.call( this, source );\n\n\t\tthis.bindMode = source.bindMode;\n\t\tthis.bindMatrix.copy( source.bindMatrix );\n\t\tthis.bindMatrixInverse.copy( source.bindMatrixInverse );\n\n\t\tthis.skeleton = source.skeleton;\n\n\t\treturn this;\n\n\t},\n\n\tbind: function ( skeleton, bindMatrix ) {\n\n\t\tthis.skeleton = skeleton;\n\n\t\tif ( bindMatrix === undefined ) {\n\n\t\t\tthis.updateMatrixWorld( true );\n\n\t\t\tthis.skeleton.calculateInverses();\n\n\t\t\tbindMatrix = this.matrixWorld;\n\n\t\t}\n\n\t\tthis.bindMatrix.copy( bindMatrix );\n\t\tthis.bindMatrixInverse.copy( bindMatrix ).invert();\n\n\t},\n\n\tpose: function () {\n\n\t\tthis.skeleton.pose();\n\n\t},\n\n\tnormalizeSkinWeights: function () {\n\n\t\tconst vector = new Vector4();\n\n\t\tconst skinWeight = this.geometry.attributes.skinWeight;\n\n\t\tfor ( let i = 0, l = skinWeight.count; i < l; i ++ ) {\n\n\t\t\tvector.x = skinWeight.getX( i );\n\t\t\tvector.y = skinWeight.getY( i );\n\t\t\tvector.z = skinWeight.getZ( i );\n\t\t\tvector.w = skinWeight.getW( i );\n\n\t\t\tconst scale = 1.0 / vector.manhattanLength();\n\n\t\t\tif ( scale !== Infinity ) {\n\n\t\t\t\tvector.multiplyScalar( scale );\n\n\t\t\t} else {\n\n\t\t\t\tvector.set( 1, 0, 0, 0 ); // do something reasonable\n\n\t\t\t}\n\n\t\t\tskinWeight.setXYZW( i, vector.x, vector.y, vector.z, vector.w );\n\n\t\t}\n\n\t},\n\n\tupdateMatrixWorld: function ( force ) {\n\n\t\tMesh.prototype.updateMatrixWorld.call( this, force );\n\n\t\tif ( this.bindMode === 'attached' ) {\n\n\t\t\tthis.bindMatrixInverse.copy( this.matrixWorld ).invert();\n\n\t\t} else if ( this.bindMode === 'detached' ) {\n\n\t\t\tthis.bindMatrixInverse.copy( this.bindMatrix ).invert();\n\n\t\t} else {\n\n\t\t\tconsole.warn( 'THREE.SkinnedMesh: Unrecognized bindMode: ' + this.bindMode );\n\n\t\t}\n\n\t},\n\n\tboneTransform: function ( index, target ) {\n\n\t\tconst skeleton = this.skeleton;\n\t\tconst geometry = this.geometry;\n\n\t\t_skinIndex.fromBufferAttribute( geometry.attributes.skinIndex, index );\n\t\t_skinWeight.fromBufferAttribute( geometry.attributes.skinWeight, index );\n\n\t\t_basePosition.fromBufferAttribute( geometry.attributes.position, index ).applyMatrix4( this.bindMatrix );\n\n\t\ttarget.set( 0, 0, 0 );\n\n\t\tfor ( let i = 0; i < 4; i ++ ) {\n\n\t\t\tconst weight = _skinWeight.getComponent( i );\n\n\t\t\tif ( weight !== 0 ) {\n\n\t\t\t\tconst boneIndex = _skinIndex.getComponent( i );\n\n\t\t\t\t_matrix$1.multiplyMatrices( skeleton.bones[ boneIndex ].matrixWorld, skeleton.boneInverses[ boneIndex ] );\n\n\t\t\t\ttarget.addScaledVector( _vector$7.copy( _basePosition ).applyMatrix4( _matrix$1 ), weight );\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn target.applyMatrix4( this.bindMatrixInverse );\n\n\t}\n\n} );\n\nfunction Bone() {\n\n\tObject3D.call( this );\n\n\tthis.type = 'Bone';\n\n}\n\nBone.prototype = Object.assign( Object.create( Object3D.prototype ), {\n\n\tconstructor: Bone,\n\n\tisBone: true\n\n} );\n\nconst _offsetMatrix = new Matrix4();\nconst _identityMatrix = new Matrix4();\n\nfunction Skeleton( bones = [], boneInverses = [] ) {\n\n\tthis.uuid = MathUtils.generateUUID();\n\n\tthis.bones = bones.slice( 0 );\n\tthis.boneInverses = boneInverses;\n\tthis.boneMatrices = null;\n\n\tthis.boneTexture = null;\n\tthis.boneTextureSize = 0;\n\n\tthis.frame = - 1;\n\n\tthis.init();\n\n}\n\nObject.assign( Skeleton.prototype, {\n\n\tinit: function () {\n\n\t\tconst bones = this.bones;\n\t\tconst boneInverses = this.boneInverses;\n\n\t\tthis.boneMatrices = new Float32Array( bones.length * 16 );\n\n\t\t// calculate inverse bone matrices if necessary\n\n\t\tif ( boneInverses.length === 0 ) {\n\n\t\t\tthis.calculateInverses();\n\n\t\t} else {\n\n\t\t\t// handle special case\n\n\t\t\tif ( bones.length !== boneInverses.length ) {\n\n\t\t\t\tconsole.warn( 'THREE.Skeleton: Number of inverse bone matrices does not match amount of bones.' );\n\n\t\t\t\tthis.boneInverses = [];\n\n\t\t\t\tfor ( let i = 0, il = this.bones.length; i < il; i ++ ) {\n\n\t\t\t\t\tthis.boneInverses.push( new Matrix4() );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t},\n\n\tcalculateInverses: function () {\n\n\t\tthis.boneInverses.length = 0;\n\n\t\tfor ( let i = 0, il = this.bones.length; i < il; i ++ ) {\n\n\t\t\tconst inverse = new Matrix4();\n\n\t\t\tif ( this.bones[ i ] ) {\n\n\t\t\t\tinverse.copy( this.bones[ i ].matrixWorld ).invert();\n\n\t\t\t}\n\n\t\t\tthis.boneInverses.push( inverse );\n\n\t\t}\n\n\t},\n\n\tpose: function () {\n\n\t\t// recover the bind-time world matrices\n\n\t\tfor ( let i = 0, il = this.bones.length; i < il; i ++ ) {\n\n\t\t\tconst bone = this.bones[ i ];\n\n\t\t\tif ( bone ) {\n\n\t\t\t\tbone.matrixWorld.copy( this.boneInverses[ i ] ).invert();\n\n\t\t\t}\n\n\t\t}\n\n\t\t// compute the local matrices, positions, rotations and scales\n\n\t\tfor ( let i = 0, il = this.bones.length; i < il; i ++ ) {\n\n\t\t\tconst bone = this.bones[ i ];\n\n\t\t\tif ( bone ) {\n\n\t\t\t\tif ( bone.parent && bone.parent.isBone ) {\n\n\t\t\t\t\tbone.matrix.copy( bone.parent.matrixWorld ).invert();\n\t\t\t\t\tbone.matrix.multiply( bone.matrixWorld );\n\n\t\t\t\t} else {\n\n\t\t\t\t\tbone.matrix.copy( bone.matrixWorld );\n\n\t\t\t\t}\n\n\t\t\t\tbone.matrix.decompose( bone.position, bone.quaternion, bone.scale );\n\n\t\t\t}\n\n\t\t}\n\n\t},\n\n\tupdate: function () {\n\n\t\tconst bones = this.bones;\n\t\tconst boneInverses = this.boneInverses;\n\t\tconst boneMatrices = this.boneMatrices;\n\t\tconst boneTexture = this.boneTexture;\n\n\t\t// flatten bone matrices to array\n\n\t\tfor ( let i = 0, il = bones.length; i < il; i ++ ) {\n\n\t\t\t// compute the offset between the current and the original transform\n\n\t\t\tconst matrix = bones[ i ] ? bones[ i ].matrixWorld : _identityMatrix;\n\n\t\t\t_offsetMatrix.multiplyMatrices( matrix, boneInverses[ i ] );\n\t\t\t_offsetMatrix.toArray( boneMatrices, i * 16 );\n\n\t\t}\n\n\t\tif ( boneTexture !== null ) {\n\n\t\t\tboneTexture.needsUpdate = true;\n\n\t\t}\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new Skeleton( this.bones, this.boneInverses );\n\n\t},\n\n\tgetBoneByName: function ( name ) {\n\n\t\tfor ( let i = 0, il = this.bones.length; i < il; i ++ ) {\n\n\t\t\tconst bone = this.bones[ i ];\n\n\t\t\tif ( bone.name === name ) {\n\n\t\t\t\treturn bone;\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn undefined;\n\n\t},\n\n\tdispose: function ( ) {\n\n\t\tif ( this.boneTexture !== null ) {\n\n\t\t\tthis.boneTexture.dispose();\n\n\t\t\tthis.boneTexture = null;\n\n\t\t}\n\n\t},\n\n\tfromJSON: function ( json, bones ) {\n\n\t\tthis.uuid = json.uuid;\n\n\t\tfor ( let i = 0, l = json.bones.length; i < l; i ++ ) {\n\n\t\t\tconst uuid = json.bones[ i ];\n\t\t\tlet bone = bones[ uuid ];\n\n\t\t\tif ( bone === undefined ) {\n\n\t\t\t\tconsole.warn( 'THREE.Skeleton: No bone found with UUID:', uuid );\n\t\t\t\tbone = new Bone();\n\n\t\t\t}\n\n\t\t\tthis.bones.push( bone );\n\t\t\tthis.boneInverses.push( new Matrix4().fromArray( json.boneInverses[ i ] ) );\n\n\t\t}\n\n\t\tthis.init();\n\n\t\treturn this;\n\n\t},\n\n\ttoJSON: function () {\n\n\t\tconst data = {\n\t\t\tmetadata: {\n\t\t\t\tversion: 4.5,\n\t\t\t\ttype: 'Skeleton',\n\t\t\t\tgenerator: 'Skeleton.toJSON'\n\t\t\t},\n\t\t\tbones: [],\n\t\t\tboneInverses: []\n\t\t};\n\n\t\tdata.uuid = this.uuid;\n\n\t\tconst bones = this.bones;\n\t\tconst boneInverses = this.boneInverses;\n\n\t\tfor ( let i = 0, l = bones.length; i < l; i ++ ) {\n\n\t\t\tconst bone = bones[ i ];\n\t\t\tdata.bones.push( bone.uuid );\n\n\t\t\tconst boneInverse = boneInverses[ i ];\n\t\t\tdata.boneInverses.push( boneInverse.toArray() );\n\n\t\t}\n\n\t\treturn data;\n\n\t}\n\n} );\n\nconst _instanceLocalMatrix = new Matrix4();\nconst _instanceWorldMatrix = new Matrix4();\n\nconst _instanceIntersects = [];\n\nconst _mesh = new Mesh();\n\nfunction InstancedMesh( geometry, material, count ) {\n\n\tMesh.call( this, geometry, material );\n\n\tthis.instanceMatrix = new BufferAttribute( new Float32Array( count * 16 ), 16 );\n\tthis.instanceColor = null;\n\n\tthis.count = count;\n\n\tthis.frustumCulled = false;\n\n}\n\nInstancedMesh.prototype = Object.assign( Object.create( Mesh.prototype ), {\n\n\tconstructor: InstancedMesh,\n\n\tisInstancedMesh: true,\n\n\tcopy: function ( source ) {\n\n\t\tMesh.prototype.copy.call( this, source );\n\n\t\tthis.instanceMatrix.copy( source.instanceMatrix );\n\n\t\tif ( source.instanceColor !== null ) this.instanceColor = source.instanceColor.clone();\n\n\t\tthis.count = source.count;\n\n\t\treturn this;\n\n\t},\n\n\tgetColorAt: function ( index, color ) {\n\n\t\tcolor.fromArray( this.instanceColor.array, index * 3 );\n\n\t},\n\n\tgetMatrixAt: function ( index, matrix ) {\n\n\t\tmatrix.fromArray( this.instanceMatrix.array, index * 16 );\n\n\t},\n\n\traycast: function ( raycaster, intersects ) {\n\n\t\tconst matrixWorld = this.matrixWorld;\n\t\tconst raycastTimes = this.count;\n\n\t\t_mesh.geometry = this.geometry;\n\t\t_mesh.material = this.material;\n\n\t\tif ( _mesh.material === undefined ) return;\n\n\t\tfor ( let instanceId = 0; instanceId < raycastTimes; instanceId ++ ) {\n\n\t\t\t// calculate the world matrix for each instance\n\n\t\t\tthis.getMatrixAt( instanceId, _instanceLocalMatrix );\n\n\t\t\t_instanceWorldMatrix.multiplyMatrices( matrixWorld, _instanceLocalMatrix );\n\n\t\t\t// the mesh represents this single instance\n\n\t\t\t_mesh.matrixWorld = _instanceWorldMatrix;\n\n\t\t\t_mesh.raycast( raycaster, _instanceIntersects );\n\n\t\t\t// process the result of raycast\n\n\t\t\tfor ( let i = 0, l = _instanceIntersects.length; i < l; i ++ ) {\n\n\t\t\t\tconst intersect = _instanceIntersects[ i ];\n\t\t\t\tintersect.instanceId = instanceId;\n\t\t\t\tintersect.object = this;\n\t\t\t\tintersects.push( intersect );\n\n\t\t\t}\n\n\t\t\t_instanceIntersects.length = 0;\n\n\t\t}\n\n\t},\n\n\tsetColorAt: function ( index, color ) {\n\n\t\tif ( this.instanceColor === null ) {\n\n\t\t\tthis.instanceColor = new BufferAttribute( new Float32Array( this.count * 3 ), 3 );\n\n\t\t}\n\n\t\tcolor.toArray( this.instanceColor.array, index * 3 );\n\n\t},\n\n\tsetMatrixAt: function ( index, matrix ) {\n\n\t\tmatrix.toArray( this.instanceMatrix.array, index * 16 );\n\n\t},\n\n\tupdateMorphTargets: function () {\n\n\t},\n\n\tdispose: function () {\n\n\t\tthis.dispatchEvent( { type: 'dispose' } );\n\n\t}\n\n} );\n\n/**\n * parameters = {\n *  color: <hex>,\n *  opacity: <float>,\n *\n *  linewidth: <float>,\n *  linecap: \"round\",\n *  linejoin: \"round\"\n * }\n */\n\nfunction LineBasicMaterial( parameters ) {\n\n\tMaterial.call( this );\n\n\tthis.type = 'LineBasicMaterial';\n\n\tthis.color = new Color( 0xffffff );\n\n\tthis.linewidth = 1;\n\tthis.linecap = 'round';\n\tthis.linejoin = 'round';\n\n\tthis.morphTargets = false;\n\n\tthis.setValues( parameters );\n\n}\n\nLineBasicMaterial.prototype = Object.create( Material.prototype );\nLineBasicMaterial.prototype.constructor = LineBasicMaterial;\n\nLineBasicMaterial.prototype.isLineBasicMaterial = true;\n\nLineBasicMaterial.prototype.copy = function ( source ) {\n\n\tMaterial.prototype.copy.call( this, source );\n\n\tthis.color.copy( source.color );\n\n\tthis.linewidth = source.linewidth;\n\tthis.linecap = source.linecap;\n\tthis.linejoin = source.linejoin;\n\n\tthis.morphTargets = source.morphTargets;\n\n\treturn this;\n\n};\n\nconst _start = new Vector3();\nconst _end = new Vector3();\nconst _inverseMatrix$1 = new Matrix4();\nconst _ray$1 = new Ray();\nconst _sphere$2 = new Sphere();\n\nfunction Line( geometry = new BufferGeometry(), material = new LineBasicMaterial() ) {\n\n\tObject3D.call( this );\n\n\tthis.type = 'Line';\n\n\tthis.geometry = geometry;\n\tthis.material = material;\n\n\tthis.updateMorphTargets();\n\n}\n\nLine.prototype = Object.assign( Object.create( Object3D.prototype ), {\n\n\tconstructor: Line,\n\n\tisLine: true,\n\n\tcopy: function ( source ) {\n\n\t\tObject3D.prototype.copy.call( this, source );\n\n\t\tthis.material = source.material;\n\t\tthis.geometry = source.geometry;\n\n\t\treturn this;\n\n\t},\n\n\tcomputeLineDistances: function () {\n\n\t\tconst geometry = this.geometry;\n\n\t\tif ( geometry.isBufferGeometry ) {\n\n\t\t\t// we assume non-indexed geometry\n\n\t\t\tif ( geometry.index === null ) {\n\n\t\t\t\tconst positionAttribute = geometry.attributes.position;\n\t\t\t\tconst lineDistances = [ 0 ];\n\n\t\t\t\tfor ( let i = 1, l = positionAttribute.count; i < l; i ++ ) {\n\n\t\t\t\t\t_start.fromBufferAttribute( positionAttribute, i - 1 );\n\t\t\t\t\t_end.fromBufferAttribute( positionAttribute, i );\n\n\t\t\t\t\tlineDistances[ i ] = lineDistances[ i - 1 ];\n\t\t\t\t\tlineDistances[ i ] += _start.distanceTo( _end );\n\n\t\t\t\t}\n\n\t\t\t\tgeometry.setAttribute( 'lineDistance', new Float32BufferAttribute( lineDistances, 1 ) );\n\n\t\t\t} else {\n\n\t\t\t\tconsole.warn( 'THREE.Line.computeLineDistances(): Computation only possible with non-indexed BufferGeometry.' );\n\n\t\t\t}\n\n\t\t} else if ( geometry.isGeometry ) {\n\n\t\t\tconsole.error( 'THREE.Line.computeLineDistances() no longer supports THREE.Geometry. Use THREE.BufferGeometry instead.' );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\traycast: function ( raycaster, intersects ) {\n\n\t\tconst geometry = this.geometry;\n\t\tconst matrixWorld = this.matrixWorld;\n\t\tconst threshold = raycaster.params.Line.threshold;\n\n\t\t// Checking boundingSphere distance to ray\n\n\t\tif ( geometry.boundingSphere === null ) geometry.computeBoundingSphere();\n\n\t\t_sphere$2.copy( geometry.boundingSphere );\n\t\t_sphere$2.applyMatrix4( matrixWorld );\n\t\t_sphere$2.radius += threshold;\n\n\t\tif ( raycaster.ray.intersectsSphere( _sphere$2 ) === false ) return;\n\n\t\t//\n\n\t\t_inverseMatrix$1.copy( matrixWorld ).invert();\n\t\t_ray$1.copy( raycaster.ray ).applyMatrix4( _inverseMatrix$1 );\n\n\t\tconst localThreshold = threshold / ( ( this.scale.x + this.scale.y + this.scale.z ) / 3 );\n\t\tconst localThresholdSq = localThreshold * localThreshold;\n\n\t\tconst vStart = new Vector3();\n\t\tconst vEnd = new Vector3();\n\t\tconst interSegment = new Vector3();\n\t\tconst interRay = new Vector3();\n\t\tconst step = this.isLineSegments ? 2 : 1;\n\n\t\tif ( geometry.isBufferGeometry ) {\n\n\t\t\tconst index = geometry.index;\n\t\t\tconst attributes = geometry.attributes;\n\t\t\tconst positionAttribute = attributes.position;\n\n\t\t\tif ( index !== null ) {\n\n\t\t\t\tconst indices = index.array;\n\n\t\t\t\tfor ( let i = 0, l = indices.length - 1; i < l; i += step ) {\n\n\t\t\t\t\tconst a = indices[ i ];\n\t\t\t\t\tconst b = indices[ i + 1 ];\n\n\t\t\t\t\tvStart.fromBufferAttribute( positionAttribute, a );\n\t\t\t\t\tvEnd.fromBufferAttribute( positionAttribute, b );\n\n\t\t\t\t\tconst distSq = _ray$1.distanceSqToSegment( vStart, vEnd, interRay, interSegment );\n\n\t\t\t\t\tif ( distSq > localThresholdSq ) continue;\n\n\t\t\t\t\tinterRay.applyMatrix4( this.matrixWorld ); //Move back to world space for distance calculation\n\n\t\t\t\t\tconst distance = raycaster.ray.origin.distanceTo( interRay );\n\n\t\t\t\t\tif ( distance < raycaster.near || distance > raycaster.far ) continue;\n\n\t\t\t\t\tintersects.push( {\n\n\t\t\t\t\t\tdistance: distance,\n\t\t\t\t\t\t// What do we want? intersection point on the ray or on the segment??\n\t\t\t\t\t\t// point: raycaster.ray.at( distance ),\n\t\t\t\t\t\tpoint: interSegment.clone().applyMatrix4( this.matrixWorld ),\n\t\t\t\t\t\tindex: i,\n\t\t\t\t\t\tface: null,\n\t\t\t\t\t\tfaceIndex: null,\n\t\t\t\t\t\tobject: this\n\n\t\t\t\t\t} );\n\n\t\t\t\t}\n\n\t\t\t} else {\n\n\t\t\t\tfor ( let i = 0, l = positionAttribute.count - 1; i < l; i += step ) {\n\n\t\t\t\t\tvStart.fromBufferAttribute( positionAttribute, i );\n\t\t\t\t\tvEnd.fromBufferAttribute( positionAttribute, i + 1 );\n\n\t\t\t\t\tconst distSq = _ray$1.distanceSqToSegment( vStart, vEnd, interRay, interSegment );\n\n\t\t\t\t\tif ( distSq > localThresholdSq ) continue;\n\n\t\t\t\t\tinterRay.applyMatrix4( this.matrixWorld ); //Move back to world space for distance calculation\n\n\t\t\t\t\tconst distance = raycaster.ray.origin.distanceTo( interRay );\n\n\t\t\t\t\tif ( distance < raycaster.near || distance > raycaster.far ) continue;\n\n\t\t\t\t\tintersects.push( {\n\n\t\t\t\t\t\tdistance: distance,\n\t\t\t\t\t\t// What do we want? intersection point on the ray or on the segment??\n\t\t\t\t\t\t// point: raycaster.ray.at( distance ),\n\t\t\t\t\t\tpoint: interSegment.clone().applyMatrix4( this.matrixWorld ),\n\t\t\t\t\t\tindex: i,\n\t\t\t\t\t\tface: null,\n\t\t\t\t\t\tfaceIndex: null,\n\t\t\t\t\t\tobject: this\n\n\t\t\t\t\t} );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t} else if ( geometry.isGeometry ) {\n\n\t\t\tconsole.error( 'THREE.Line.raycast() no longer supports THREE.Geometry. Use THREE.BufferGeometry instead.' );\n\n\t\t}\n\n\t},\n\n\tupdateMorphTargets: function () {\n\n\t\tconst geometry = this.geometry;\n\n\t\tif ( geometry.isBufferGeometry ) {\n\n\t\t\tconst morphAttributes = geometry.morphAttributes;\n\t\t\tconst keys = Object.keys( morphAttributes );\n\n\t\t\tif ( keys.length > 0 ) {\n\n\t\t\t\tconst morphAttribute = morphAttributes[ keys[ 0 ] ];\n\n\t\t\t\tif ( morphAttribute !== undefined ) {\n\n\t\t\t\t\tthis.morphTargetInfluences = [];\n\t\t\t\t\tthis.morphTargetDictionary = {};\n\n\t\t\t\t\tfor ( let m = 0, ml = morphAttribute.length; m < ml; m ++ ) {\n\n\t\t\t\t\t\tconst name = morphAttribute[ m ].name || String( m );\n\n\t\t\t\t\t\tthis.morphTargetInfluences.push( 0 );\n\t\t\t\t\t\tthis.morphTargetDictionary[ name ] = m;\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\tconst morphTargets = geometry.morphTargets;\n\n\t\t\tif ( morphTargets !== undefined && morphTargets.length > 0 ) {\n\n\t\t\t\tconsole.error( 'THREE.Line.updateMorphTargets() does not support THREE.Geometry. Use THREE.BufferGeometry instead.' );\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n} );\n\nconst _start$1 = new Vector3();\nconst _end$1 = new Vector3();\n\nfunction LineSegments( geometry, material ) {\n\n\tLine.call( this, geometry, material );\n\n\tthis.type = 'LineSegments';\n\n}\n\nLineSegments.prototype = Object.assign( Object.create( Line.prototype ), {\n\n\tconstructor: LineSegments,\n\n\tisLineSegments: true,\n\n\tcomputeLineDistances: function () {\n\n\t\tconst geometry = this.geometry;\n\n\t\tif ( geometry.isBufferGeometry ) {\n\n\t\t\t// we assume non-indexed geometry\n\n\t\t\tif ( geometry.index === null ) {\n\n\t\t\t\tconst positionAttribute = geometry.attributes.position;\n\t\t\t\tconst lineDistances = [];\n\n\t\t\t\tfor ( let i = 0, l = positionAttribute.count; i < l; i += 2 ) {\n\n\t\t\t\t\t_start$1.fromBufferAttribute( positionAttribute, i );\n\t\t\t\t\t_end$1.fromBufferAttribute( positionAttribute, i + 1 );\n\n\t\t\t\t\tlineDistances[ i ] = ( i === 0 ) ? 0 : lineDistances[ i - 1 ];\n\t\t\t\t\tlineDistances[ i + 1 ] = lineDistances[ i ] + _start$1.distanceTo( _end$1 );\n\n\t\t\t\t}\n\n\t\t\t\tgeometry.setAttribute( 'lineDistance', new Float32BufferAttribute( lineDistances, 1 ) );\n\n\t\t\t} else {\n\n\t\t\t\tconsole.warn( 'THREE.LineSegments.computeLineDistances(): Computation only possible with non-indexed BufferGeometry.' );\n\n\t\t\t}\n\n\t\t} else if ( geometry.isGeometry ) {\n\n\t\t\tconsole.error( 'THREE.LineSegments.computeLineDistances() no longer supports THREE.Geometry. Use THREE.BufferGeometry instead.' );\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n} );\n\nfunction LineLoop( geometry, material ) {\n\n\tLine.call( this, geometry, material );\n\n\tthis.type = 'LineLoop';\n\n}\n\nLineLoop.prototype = Object.assign( Object.create( Line.prototype ), {\n\n\tconstructor: LineLoop,\n\n\tisLineLoop: true,\n\n} );\n\n/**\n * parameters = {\n *  color: <hex>,\n *  opacity: <float>,\n *  map: new THREE.Texture( <Image> ),\n *  alphaMap: new THREE.Texture( <Image> ),\n *\n *  size: <float>,\n *  sizeAttenuation: <bool>\n *\n *  morphTargets: <bool>\n * }\n */\n\nfunction PointsMaterial( parameters ) {\n\n\tMaterial.call( this );\n\n\tthis.type = 'PointsMaterial';\n\n\tthis.color = new Color( 0xffffff );\n\n\tthis.map = null;\n\n\tthis.alphaMap = null;\n\n\tthis.size = 1;\n\tthis.sizeAttenuation = true;\n\n\tthis.morphTargets = false;\n\n\tthis.setValues( parameters );\n\n}\n\nPointsMaterial.prototype = Object.create( Material.prototype );\nPointsMaterial.prototype.constructor = PointsMaterial;\n\nPointsMaterial.prototype.isPointsMaterial = true;\n\nPointsMaterial.prototype.copy = function ( source ) {\n\n\tMaterial.prototype.copy.call( this, source );\n\n\tthis.color.copy( source.color );\n\n\tthis.map = source.map;\n\n\tthis.alphaMap = source.alphaMap;\n\n\tthis.size = source.size;\n\tthis.sizeAttenuation = source.sizeAttenuation;\n\n\tthis.morphTargets = source.morphTargets;\n\n\treturn this;\n\n};\n\nconst _inverseMatrix$2 = new Matrix4();\nconst _ray$2 = new Ray();\nconst _sphere$3 = new Sphere();\nconst _position$1 = new Vector3();\n\nfunction Points( geometry = new BufferGeometry(), material = new PointsMaterial() ) {\n\n\tObject3D.call( this );\n\n\tthis.type = 'Points';\n\n\tthis.geometry = geometry;\n\tthis.material = material;\n\n\tthis.updateMorphTargets();\n\n}\n\nPoints.prototype = Object.assign( Object.create( Object3D.prototype ), {\n\n\tconstructor: Points,\n\n\tisPoints: true,\n\n\tcopy: function ( source ) {\n\n\t\tObject3D.prototype.copy.call( this, source );\n\n\t\tthis.material = source.material;\n\t\tthis.geometry = source.geometry;\n\n\t\treturn this;\n\n\t},\n\n\traycast: function ( raycaster, intersects ) {\n\n\t\tconst geometry = this.geometry;\n\t\tconst matrixWorld = this.matrixWorld;\n\t\tconst threshold = raycaster.params.Points.threshold;\n\n\t\t// Checking boundingSphere distance to ray\n\n\t\tif ( geometry.boundingSphere === null ) geometry.computeBoundingSphere();\n\n\t\t_sphere$3.copy( geometry.boundingSphere );\n\t\t_sphere$3.applyMatrix4( matrixWorld );\n\t\t_sphere$3.radius += threshold;\n\n\t\tif ( raycaster.ray.intersectsSphere( _sphere$3 ) === false ) return;\n\n\t\t//\n\n\t\t_inverseMatrix$2.copy( matrixWorld ).invert();\n\t\t_ray$2.copy( raycaster.ray ).applyMatrix4( _inverseMatrix$2 );\n\n\t\tconst localThreshold = threshold / ( ( this.scale.x + this.scale.y + this.scale.z ) / 3 );\n\t\tconst localThresholdSq = localThreshold * localThreshold;\n\n\t\tif ( geometry.isBufferGeometry ) {\n\n\t\t\tconst index = geometry.index;\n\t\t\tconst attributes = geometry.attributes;\n\t\t\tconst positionAttribute = attributes.position;\n\n\t\t\tif ( index !== null ) {\n\n\t\t\t\tconst indices = index.array;\n\n\t\t\t\tfor ( let i = 0, il = indices.length; i < il; i ++ ) {\n\n\t\t\t\t\tconst a = indices[ i ];\n\n\t\t\t\t\t_position$1.fromBufferAttribute( positionAttribute, a );\n\n\t\t\t\t\ttestPoint( _position$1, a, localThresholdSq, matrixWorld, raycaster, intersects, this );\n\n\t\t\t\t}\n\n\t\t\t} else {\n\n\t\t\t\tfor ( let i = 0, l = positionAttribute.count; i < l; i ++ ) {\n\n\t\t\t\t\t_position$1.fromBufferAttribute( positionAttribute, i );\n\n\t\t\t\t\ttestPoint( _position$1, i, localThresholdSq, matrixWorld, raycaster, intersects, this );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\tconsole.error( 'THREE.Points.raycast() no longer supports THREE.Geometry. Use THREE.BufferGeometry instead.' );\n\n\t\t}\n\n\t},\n\n\tupdateMorphTargets: function () {\n\n\t\tconst geometry = this.geometry;\n\n\t\tif ( geometry.isBufferGeometry ) {\n\n\t\t\tconst morphAttributes = geometry.morphAttributes;\n\t\t\tconst keys = Object.keys( morphAttributes );\n\n\t\t\tif ( keys.length > 0 ) {\n\n\t\t\t\tconst morphAttribute = morphAttributes[ keys[ 0 ] ];\n\n\t\t\t\tif ( morphAttribute !== undefined ) {\n\n\t\t\t\t\tthis.morphTargetInfluences = [];\n\t\t\t\t\tthis.morphTargetDictionary = {};\n\n\t\t\t\t\tfor ( let m = 0, ml = morphAttribute.length; m < ml; m ++ ) {\n\n\t\t\t\t\t\tconst name = morphAttribute[ m ].name || String( m );\n\n\t\t\t\t\t\tthis.morphTargetInfluences.push( 0 );\n\t\t\t\t\t\tthis.morphTargetDictionary[ name ] = m;\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\tconst morphTargets = geometry.morphTargets;\n\n\t\t\tif ( morphTargets !== undefined && morphTargets.length > 0 ) {\n\n\t\t\t\tconsole.error( 'THREE.Points.updateMorphTargets() does not support THREE.Geometry. Use THREE.BufferGeometry instead.' );\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n} );\n\nfunction testPoint( point, index, localThresholdSq, matrixWorld, raycaster, intersects, object ) {\n\n\tconst rayPointDistanceSq = _ray$2.distanceSqToPoint( point );\n\n\tif ( rayPointDistanceSq < localThresholdSq ) {\n\n\t\tconst intersectPoint = new Vector3();\n\n\t\t_ray$2.closestPointToPoint( point, intersectPoint );\n\t\tintersectPoint.applyMatrix4( matrixWorld );\n\n\t\tconst distance = raycaster.ray.origin.distanceTo( intersectPoint );\n\n\t\tif ( distance < raycaster.near || distance > raycaster.far ) return;\n\n\t\tintersects.push( {\n\n\t\t\tdistance: distance,\n\t\t\tdistanceToRay: Math.sqrt( rayPointDistanceSq ),\n\t\t\tpoint: intersectPoint,\n\t\t\tindex: index,\n\t\t\tface: null,\n\t\t\tobject: object\n\n\t\t} );\n\n\t}\n\n}\n\nfunction VideoTexture( video, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy ) {\n\n\tTexture.call( this, video, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy );\n\n\tthis.format = format !== undefined ? format : RGBFormat;\n\n\tthis.minFilter = minFilter !== undefined ? minFilter : LinearFilter;\n\tthis.magFilter = magFilter !== undefined ? magFilter : LinearFilter;\n\n\tthis.generateMipmaps = false;\n\n\tconst scope = this;\n\n\tfunction updateVideo() {\n\n\t\tscope.needsUpdate = true;\n\t\tvideo.requestVideoFrameCallback( updateVideo );\n\n\t}\n\n\tif ( 'requestVideoFrameCallback' in video ) {\n\n\t\tvideo.requestVideoFrameCallback( updateVideo );\n\n\t}\n\n}\n\nVideoTexture.prototype = Object.assign( Object.create( Texture.prototype ), {\n\n\tconstructor: VideoTexture,\n\n\tclone: function () {\n\n\t\treturn new this.constructor( this.image ).copy( this );\n\n\t},\n\n\tisVideoTexture: true,\n\n\tupdate: function () {\n\n\t\tconst video = this.image;\n\t\tconst hasVideoFrameCallback = 'requestVideoFrameCallback' in video;\n\n\t\tif ( hasVideoFrameCallback === false && video.readyState >= video.HAVE_CURRENT_DATA ) {\n\n\t\t\tthis.needsUpdate = true;\n\n\t\t}\n\n\t}\n\n} );\n\nfunction CompressedTexture( mipmaps, width, height, format, type, mapping, wrapS, wrapT, magFilter, minFilter, anisotropy, encoding ) {\n\n\tTexture.call( this, null, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding );\n\n\tthis.image = { width: width, height: height };\n\tthis.mipmaps = mipmaps;\n\n\t// no flipping for cube textures\n\t// (also flipping doesn't work for compressed textures )\n\n\tthis.flipY = false;\n\n\t// can't generate mipmaps for compressed textures\n\t// mips must be embedded in DDS files\n\n\tthis.generateMipmaps = false;\n\n}\n\nCompressedTexture.prototype = Object.create( Texture.prototype );\nCompressedTexture.prototype.constructor = CompressedTexture;\n\nCompressedTexture.prototype.isCompressedTexture = true;\n\nfunction CanvasTexture( canvas, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy ) {\n\n\tTexture.call( this, canvas, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy );\n\n\tthis.needsUpdate = true;\n\n}\n\nCanvasTexture.prototype = Object.create( Texture.prototype );\nCanvasTexture.prototype.constructor = CanvasTexture;\nCanvasTexture.prototype.isCanvasTexture = true;\n\nfunction DepthTexture( width, height, type, mapping, wrapS, wrapT, magFilter, minFilter, anisotropy, format ) {\n\n\tformat = format !== undefined ? format : DepthFormat;\n\n\tif ( format !== DepthFormat && format !== DepthStencilFormat ) {\n\n\t\tthrow new Error( 'DepthTexture format must be either THREE.DepthFormat or THREE.DepthStencilFormat' );\n\n\t}\n\n\tif ( type === undefined && format === DepthFormat ) type = UnsignedShortType;\n\tif ( type === undefined && format === DepthStencilFormat ) type = UnsignedInt248Type;\n\n\tTexture.call( this, null, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy );\n\n\tthis.image = { width: width, height: height };\n\n\tthis.magFilter = magFilter !== undefined ? magFilter : NearestFilter;\n\tthis.minFilter = minFilter !== undefined ? minFilter : NearestFilter;\n\n\tthis.flipY = false;\n\tthis.generateMipmaps = false;\n\n}\n\nDepthTexture.prototype = Object.create( Texture.prototype );\nDepthTexture.prototype.constructor = DepthTexture;\nDepthTexture.prototype.isDepthTexture = true;\n\nclass CircleGeometry extends BufferGeometry {\n\n\tconstructor( radius = 1, segments = 8, thetaStart = 0, thetaLength = Math.PI * 2 ) {\n\n\t\tsuper();\n\n\t\tthis.type = 'CircleGeometry';\n\n\t\tthis.parameters = {\n\t\t\tradius: radius,\n\t\t\tsegments: segments,\n\t\t\tthetaStart: thetaStart,\n\t\t\tthetaLength: thetaLength\n\t\t};\n\n\t\tsegments = Math.max( 3, segments );\n\n\t\t// buffers\n\n\t\tconst indices = [];\n\t\tconst vertices = [];\n\t\tconst normals = [];\n\t\tconst uvs = [];\n\n\t\t// helper variables\n\n\t\tconst vertex = new Vector3();\n\t\tconst uv = new Vector2();\n\n\t\t// center point\n\n\t\tvertices.push( 0, 0, 0 );\n\t\tnormals.push( 0, 0, 1 );\n\t\tuvs.push( 0.5, 0.5 );\n\n\t\tfor ( let s = 0, i = 3; s <= segments; s ++, i += 3 ) {\n\n\t\t\tconst segment = thetaStart + s / segments * thetaLength;\n\n\t\t\t// vertex\n\n\t\t\tvertex.x = radius * Math.cos( segment );\n\t\t\tvertex.y = radius * Math.sin( segment );\n\n\t\t\tvertices.push( vertex.x, vertex.y, vertex.z );\n\n\t\t\t// normal\n\n\t\t\tnormals.push( 0, 0, 1 );\n\n\t\t\t// uvs\n\n\t\t\tuv.x = ( vertices[ i ] / radius + 1 ) / 2;\n\t\t\tuv.y = ( vertices[ i + 1 ] / radius + 1 ) / 2;\n\n\t\t\tuvs.push( uv.x, uv.y );\n\n\t\t}\n\n\t\t// indices\n\n\t\tfor ( let i = 1; i <= segments; i ++ ) {\n\n\t\t\tindices.push( i, i + 1, 0 );\n\n\t\t}\n\n\t\t// build geometry\n\n\t\tthis.setIndex( indices );\n\t\tthis.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\t\tthis.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );\n\t\tthis.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );\n\n\t}\n\n}\n\nclass CylinderGeometry extends BufferGeometry {\n\n\tconstructor( radiusTop = 1, radiusBottom = 1, height = 1, radialSegments = 8, heightSegments = 1, openEnded = false, thetaStart = 0, thetaLength = Math.PI * 2 ) {\n\n\t\tsuper();\n\t\tthis.type = 'CylinderGeometry';\n\n\t\tthis.parameters = {\n\t\t\tradiusTop: radiusTop,\n\t\t\tradiusBottom: radiusBottom,\n\t\t\theight: height,\n\t\t\tradialSegments: radialSegments,\n\t\t\theightSegments: heightSegments,\n\t\t\topenEnded: openEnded,\n\t\t\tthetaStart: thetaStart,\n\t\t\tthetaLength: thetaLength\n\t\t};\n\n\t\tconst scope = this;\n\n\t\tradialSegments = Math.floor( radialSegments );\n\t\theightSegments = Math.floor( heightSegments );\n\n\t\t// buffers\n\n\t\tconst indices = [];\n\t\tconst vertices = [];\n\t\tconst normals = [];\n\t\tconst uvs = [];\n\n\t\t// helper variables\n\n\t\tlet index = 0;\n\t\tconst indexArray = [];\n\t\tconst halfHeight = height / 2;\n\t\tlet groupStart = 0;\n\n\t\t// generate geometry\n\n\t\tgenerateTorso();\n\n\t\tif ( openEnded === false ) {\n\n\t\t\tif ( radiusTop > 0 ) generateCap( true );\n\t\t\tif ( radiusBottom > 0 ) generateCap( false );\n\n\t\t}\n\n\t\t// build geometry\n\n\t\tthis.setIndex( indices );\n\t\tthis.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\t\tthis.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );\n\t\tthis.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );\n\n\t\tfunction generateTorso() {\n\n\t\t\tconst normal = new Vector3();\n\t\t\tconst vertex = new Vector3();\n\n\t\t\tlet groupCount = 0;\n\n\t\t\t// this will be used to calculate the normal\n\t\t\tconst slope = ( radiusBottom - radiusTop ) / height;\n\n\t\t\t// generate vertices, normals and uvs\n\n\t\t\tfor ( let y = 0; y <= heightSegments; y ++ ) {\n\n\t\t\t\tconst indexRow = [];\n\n\t\t\t\tconst v = y / heightSegments;\n\n\t\t\t\t// calculate the radius of the current row\n\n\t\t\t\tconst radius = v * ( radiusBottom - radiusTop ) + radiusTop;\n\n\t\t\t\tfor ( let x = 0; x <= radialSegments; x ++ ) {\n\n\t\t\t\t\tconst u = x / radialSegments;\n\n\t\t\t\t\tconst theta = u * thetaLength + thetaStart;\n\n\t\t\t\t\tconst sinTheta = Math.sin( theta );\n\t\t\t\t\tconst cosTheta = Math.cos( theta );\n\n\t\t\t\t\t// vertex\n\n\t\t\t\t\tvertex.x = radius * sinTheta;\n\t\t\t\t\tvertex.y = - v * height + halfHeight;\n\t\t\t\t\tvertex.z = radius * cosTheta;\n\t\t\t\t\tvertices.push( vertex.x, vertex.y, vertex.z );\n\n\t\t\t\t\t// normal\n\n\t\t\t\t\tnormal.set( sinTheta, slope, cosTheta ).normalize();\n\t\t\t\t\tnormals.push( normal.x, normal.y, normal.z );\n\n\t\t\t\t\t// uv\n\n\t\t\t\t\tuvs.push( u, 1 - v );\n\n\t\t\t\t\t// save index of vertex in respective row\n\n\t\t\t\t\tindexRow.push( index ++ );\n\n\t\t\t\t}\n\n\t\t\t\t// now save vertices of the row in our index array\n\n\t\t\t\tindexArray.push( indexRow );\n\n\t\t\t}\n\n\t\t\t// generate indices\n\n\t\t\tfor ( let x = 0; x < radialSegments; x ++ ) {\n\n\t\t\t\tfor ( let y = 0; y < heightSegments; y ++ ) {\n\n\t\t\t\t\t// we use the index array to access the correct indices\n\n\t\t\t\t\tconst a = indexArray[ y ][ x ];\n\t\t\t\t\tconst b = indexArray[ y + 1 ][ x ];\n\t\t\t\t\tconst c = indexArray[ y + 1 ][ x + 1 ];\n\t\t\t\t\tconst d = indexArray[ y ][ x + 1 ];\n\n\t\t\t\t\t// faces\n\n\t\t\t\t\tindices.push( a, b, d );\n\t\t\t\t\tindices.push( b, c, d );\n\n\t\t\t\t\t// update group counter\n\n\t\t\t\t\tgroupCount += 6;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\t// add a group to the geometry. this will ensure multi material support\n\n\t\t\tscope.addGroup( groupStart, groupCount, 0 );\n\n\t\t\t// calculate new start value for groups\n\n\t\t\tgroupStart += groupCount;\n\n\t\t}\n\n\t\tfunction generateCap( top ) {\n\n\t\t\t// save the index of the first center vertex\n\t\t\tconst centerIndexStart = index;\n\n\t\t\tconst uv = new Vector2();\n\t\t\tconst vertex = new Vector3();\n\n\t\t\tlet groupCount = 0;\n\n\t\t\tconst radius = ( top === true ) ? radiusTop : radiusBottom;\n\t\t\tconst sign = ( top === true ) ? 1 : - 1;\n\n\t\t\t// first we generate the center vertex data of the cap.\n\t\t\t// because the geometry needs one set of uvs per face,\n\t\t\t// we must generate a center vertex per face/segment\n\n\t\t\tfor ( let x = 1; x <= radialSegments; x ++ ) {\n\n\t\t\t\t// vertex\n\n\t\t\t\tvertices.push( 0, halfHeight * sign, 0 );\n\n\t\t\t\t// normal\n\n\t\t\t\tnormals.push( 0, sign, 0 );\n\n\t\t\t\t// uv\n\n\t\t\t\tuvs.push( 0.5, 0.5 );\n\n\t\t\t\t// increase index\n\n\t\t\t\tindex ++;\n\n\t\t\t}\n\n\t\t\t// save the index of the last center vertex\n\t\t\tconst centerIndexEnd = index;\n\n\t\t\t// now we generate the surrounding vertices, normals and uvs\n\n\t\t\tfor ( let x = 0; x <= radialSegments; x ++ ) {\n\n\t\t\t\tconst u = x / radialSegments;\n\t\t\t\tconst theta = u * thetaLength + thetaStart;\n\n\t\t\t\tconst cosTheta = Math.cos( theta );\n\t\t\t\tconst sinTheta = Math.sin( theta );\n\n\t\t\t\t// vertex\n\n\t\t\t\tvertex.x = radius * sinTheta;\n\t\t\t\tvertex.y = halfHeight * sign;\n\t\t\t\tvertex.z = radius * cosTheta;\n\t\t\t\tvertices.push( vertex.x, vertex.y, vertex.z );\n\n\t\t\t\t// normal\n\n\t\t\t\tnormals.push( 0, sign, 0 );\n\n\t\t\t\t// uv\n\n\t\t\t\tuv.x = ( cosTheta * 0.5 ) + 0.5;\n\t\t\t\tuv.y = ( sinTheta * 0.5 * sign ) + 0.5;\n\t\t\t\tuvs.push( uv.x, uv.y );\n\n\t\t\t\t// increase index\n\n\t\t\t\tindex ++;\n\n\t\t\t}\n\n\t\t\t// generate indices\n\n\t\t\tfor ( let x = 0; x < radialSegments; x ++ ) {\n\n\t\t\t\tconst c = centerIndexStart + x;\n\t\t\t\tconst i = centerIndexEnd + x;\n\n\t\t\t\tif ( top === true ) {\n\n\t\t\t\t\t// face top\n\n\t\t\t\t\tindices.push( i, i + 1, c );\n\n\t\t\t\t} else {\n\n\t\t\t\t\t// face bottom\n\n\t\t\t\t\tindices.push( i + 1, i, c );\n\n\t\t\t\t}\n\n\t\t\t\tgroupCount += 3;\n\n\t\t\t}\n\n\t\t\t// add a group to the geometry. this will ensure multi material support\n\n\t\t\tscope.addGroup( groupStart, groupCount, top === true ? 1 : 2 );\n\n\t\t\t// calculate new start value for groups\n\n\t\t\tgroupStart += groupCount;\n\n\t\t}\n\n\t}\n\n}\n\nclass ConeGeometry extends CylinderGeometry {\n\n\tconstructor( radius = 1, height = 1, radialSegments = 8, heightSegments = 1, openEnded = false, thetaStart = 0, thetaLength = Math.PI * 2 ) {\n\n\t\tsuper( 0, radius, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength );\n\n\t\tthis.type = 'ConeGeometry';\n\n\t\tthis.parameters = {\n\t\t\tradius: radius,\n\t\t\theight: height,\n\t\t\tradialSegments: radialSegments,\n\t\t\theightSegments: heightSegments,\n\t\t\topenEnded: openEnded,\n\t\t\tthetaStart: thetaStart,\n\t\t\tthetaLength: thetaLength\n\t\t};\n\n\t}\n\n}\n\nclass PolyhedronGeometry extends BufferGeometry {\n\n\tconstructor( vertices, indices, radius = 1, detail = 0 ) {\n\n\t\tsuper();\n\n\t\tthis.type = 'PolyhedronGeometry';\n\n\t\tthis.parameters = {\n\t\t\tvertices: vertices,\n\t\t\tindices: indices,\n\t\t\tradius: radius,\n\t\t\tdetail: detail\n\t\t};\n\n\t\t// default buffer data\n\n\t\tconst vertexBuffer = [];\n\t\tconst uvBuffer = [];\n\n\t\t// the subdivision creates the vertex buffer data\n\n\t\tsubdivide( detail );\n\n\t\t// all vertices should lie on a conceptual sphere with a given radius\n\n\t\tapplyRadius( radius );\n\n\t\t// finally, create the uv data\n\n\t\tgenerateUVs();\n\n\t\t// build non-indexed geometry\n\n\t\tthis.setAttribute( 'position', new Float32BufferAttribute( vertexBuffer, 3 ) );\n\t\tthis.setAttribute( 'normal', new Float32BufferAttribute( vertexBuffer.slice(), 3 ) );\n\t\tthis.setAttribute( 'uv', new Float32BufferAttribute( uvBuffer, 2 ) );\n\n\t\tif ( detail === 0 ) {\n\n\t\t\tthis.computeVertexNormals(); // flat normals\n\n\t\t} else {\n\n\t\t\tthis.normalizeNormals(); // smooth normals\n\n\t\t}\n\n\t\t// helper functions\n\n\t\tfunction subdivide( detail ) {\n\n\t\t\tconst a = new Vector3();\n\t\t\tconst b = new Vector3();\n\t\t\tconst c = new Vector3();\n\n\t\t\t// iterate over all faces and apply a subdivison with the given detail value\n\n\t\t\tfor ( let i = 0; i < indices.length; i += 3 ) {\n\n\t\t\t\t// get the vertices of the face\n\n\t\t\t\tgetVertexByIndex( indices[ i + 0 ], a );\n\t\t\t\tgetVertexByIndex( indices[ i + 1 ], b );\n\t\t\t\tgetVertexByIndex( indices[ i + 2 ], c );\n\n\t\t\t\t// perform subdivision\n\n\t\t\t\tsubdivideFace( a, b, c, detail );\n\n\t\t\t}\n\n\t\t}\n\n\t\tfunction subdivideFace( a, b, c, detail ) {\n\n\t\t\tconst cols = detail + 1;\n\n\t\t\t// we use this multidimensional array as a data structure for creating the subdivision\n\n\t\t\tconst v = [];\n\n\t\t\t// construct all of the vertices for this subdivision\n\n\t\t\tfor ( let i = 0; i <= cols; i ++ ) {\n\n\t\t\t\tv[ i ] = [];\n\n\t\t\t\tconst aj = a.clone().lerp( c, i / cols );\n\t\t\t\tconst bj = b.clone().lerp( c, i / cols );\n\n\t\t\t\tconst rows = cols - i;\n\n\t\t\t\tfor ( let j = 0; j <= rows; j ++ ) {\n\n\t\t\t\t\tif ( j === 0 && i === cols ) {\n\n\t\t\t\t\t\tv[ i ][ j ] = aj;\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\tv[ i ][ j ] = aj.clone().lerp( bj, j / rows );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\t// construct all of the faces\n\n\t\t\tfor ( let i = 0; i < cols; i ++ ) {\n\n\t\t\t\tfor ( let j = 0; j < 2 * ( cols - i ) - 1; j ++ ) {\n\n\t\t\t\t\tconst k = Math.floor( j / 2 );\n\n\t\t\t\t\tif ( j % 2 === 0 ) {\n\n\t\t\t\t\t\tpushVertex( v[ i ][ k + 1 ] );\n\t\t\t\t\t\tpushVertex( v[ i + 1 ][ k ] );\n\t\t\t\t\t\tpushVertex( v[ i ][ k ] );\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\tpushVertex( v[ i ][ k + 1 ] );\n\t\t\t\t\t\tpushVertex( v[ i + 1 ][ k + 1 ] );\n\t\t\t\t\t\tpushVertex( v[ i + 1 ][ k ] );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\tfunction applyRadius( radius ) {\n\n\t\t\tconst vertex = new Vector3();\n\n\t\t\t// iterate over the entire buffer and apply the radius to each vertex\n\n\t\t\tfor ( let i = 0; i < vertexBuffer.length; i += 3 ) {\n\n\t\t\t\tvertex.x = vertexBuffer[ i + 0 ];\n\t\t\t\tvertex.y = vertexBuffer[ i + 1 ];\n\t\t\t\tvertex.z = vertexBuffer[ i + 2 ];\n\n\t\t\t\tvertex.normalize().multiplyScalar( radius );\n\n\t\t\t\tvertexBuffer[ i + 0 ] = vertex.x;\n\t\t\t\tvertexBuffer[ i + 1 ] = vertex.y;\n\t\t\t\tvertexBuffer[ i + 2 ] = vertex.z;\n\n\t\t\t}\n\n\t\t}\n\n\t\tfunction generateUVs() {\n\n\t\t\tconst vertex = new Vector3();\n\n\t\t\tfor ( let i = 0; i < vertexBuffer.length; i += 3 ) {\n\n\t\t\t\tvertex.x = vertexBuffer[ i + 0 ];\n\t\t\t\tvertex.y = vertexBuffer[ i + 1 ];\n\t\t\t\tvertex.z = vertexBuffer[ i + 2 ];\n\n\t\t\t\tconst u = azimuth( vertex ) / 2 / Math.PI + 0.5;\n\t\t\t\tconst v = inclination( vertex ) / Math.PI + 0.5;\n\t\t\t\tuvBuffer.push( u, 1 - v );\n\n\t\t\t}\n\n\t\t\tcorrectUVs();\n\n\t\t\tcorrectSeam();\n\n\t\t}\n\n\t\tfunction correctSeam() {\n\n\t\t\t// handle case when face straddles the seam, see #3269\n\n\t\t\tfor ( let i = 0; i < uvBuffer.length; i += 6 ) {\n\n\t\t\t\t// uv data of a single face\n\n\t\t\t\tconst x0 = uvBuffer[ i + 0 ];\n\t\t\t\tconst x1 = uvBuffer[ i + 2 ];\n\t\t\t\tconst x2 = uvBuffer[ i + 4 ];\n\n\t\t\t\tconst max = Math.max( x0, x1, x2 );\n\t\t\t\tconst min = Math.min( x0, x1, x2 );\n\n\t\t\t\t// 0.9 is somewhat arbitrary\n\n\t\t\t\tif ( max > 0.9 && min < 0.1 ) {\n\n\t\t\t\t\tif ( x0 < 0.2 ) uvBuffer[ i + 0 ] += 1;\n\t\t\t\t\tif ( x1 < 0.2 ) uvBuffer[ i + 2 ] += 1;\n\t\t\t\t\tif ( x2 < 0.2 ) uvBuffer[ i + 4 ] += 1;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\tfunction pushVertex( vertex ) {\n\n\t\t\tvertexBuffer.push( vertex.x, vertex.y, vertex.z );\n\n\t\t}\n\n\t\tfunction getVertexByIndex( index, vertex ) {\n\n\t\t\tconst stride = index * 3;\n\n\t\t\tvertex.x = vertices[ stride + 0 ];\n\t\t\tvertex.y = vertices[ stride + 1 ];\n\t\t\tvertex.z = vertices[ stride + 2 ];\n\n\t\t}\n\n\t\tfunction correctUVs() {\n\n\t\t\tconst a = new Vector3();\n\t\t\tconst b = new Vector3();\n\t\t\tconst c = new Vector3();\n\n\t\t\tconst centroid = new Vector3();\n\n\t\t\tconst uvA = new Vector2();\n\t\t\tconst uvB = new Vector2();\n\t\t\tconst uvC = new Vector2();\n\n\t\t\tfor ( let i = 0, j = 0; i < vertexBuffer.length; i += 9, j += 6 ) {\n\n\t\t\t\ta.set( vertexBuffer[ i + 0 ], vertexBuffer[ i + 1 ], vertexBuffer[ i + 2 ] );\n\t\t\t\tb.set( vertexBuffer[ i + 3 ], vertexBuffer[ i + 4 ], vertexBuffer[ i + 5 ] );\n\t\t\t\tc.set( vertexBuffer[ i + 6 ], vertexBuffer[ i + 7 ], vertexBuffer[ i + 8 ] );\n\n\t\t\t\tuvA.set( uvBuffer[ j + 0 ], uvBuffer[ j + 1 ] );\n\t\t\t\tuvB.set( uvBuffer[ j + 2 ], uvBuffer[ j + 3 ] );\n\t\t\t\tuvC.set( uvBuffer[ j + 4 ], uvBuffer[ j + 5 ] );\n\n\t\t\t\tcentroid.copy( a ).add( b ).add( c ).divideScalar( 3 );\n\n\t\t\t\tconst azi = azimuth( centroid );\n\n\t\t\t\tcorrectUV( uvA, j + 0, a, azi );\n\t\t\t\tcorrectUV( uvB, j + 2, b, azi );\n\t\t\t\tcorrectUV( uvC, j + 4, c, azi );\n\n\t\t\t}\n\n\t\t}\n\n\t\tfunction correctUV( uv, stride, vector, azimuth ) {\n\n\t\t\tif ( ( azimuth < 0 ) && ( uv.x === 1 ) ) {\n\n\t\t\t\tuvBuffer[ stride ] = uv.x - 1;\n\n\t\t\t}\n\n\t\t\tif ( ( vector.x === 0 ) && ( vector.z === 0 ) ) {\n\n\t\t\t\tuvBuffer[ stride ] = azimuth / 2 / Math.PI + 0.5;\n\n\t\t\t}\n\n\t\t}\n\n\t\t// Angle around the Y axis, counter-clockwise when looking from above.\n\n\t\tfunction azimuth( vector ) {\n\n\t\t\treturn Math.atan2( vector.z, - vector.x );\n\n\t\t}\n\n\n\t\t// Angle above the XZ plane.\n\n\t\tfunction inclination( vector ) {\n\n\t\t\treturn Math.atan2( - vector.y, Math.sqrt( ( vector.x * vector.x ) + ( vector.z * vector.z ) ) );\n\n\t\t}\n\n\t}\n\n}\n\nclass DodecahedronGeometry extends PolyhedronGeometry {\n\n\tconstructor( radius = 1, detail = 0 ) {\n\n\t\tconst t = ( 1 + Math.sqrt( 5 ) ) / 2;\n\t\tconst r = 1 / t;\n\n\t\tconst vertices = [\n\n\t\t\t// (±1, ±1, ±1)\n\t\t\t- 1, - 1, - 1,\t- 1, - 1, 1,\n\t\t\t- 1, 1, - 1, - 1, 1, 1,\n\t\t\t1, - 1, - 1, 1, - 1, 1,\n\t\t\t1, 1, - 1, 1, 1, 1,\n\n\t\t\t// (0, ±1/φ, ±φ)\n\t\t\t0, - r, - t, 0, - r, t,\n\t\t\t0, r, - t, 0, r, t,\n\n\t\t\t// (±1/φ, ±φ, 0)\n\t\t\t- r, - t, 0, - r, t, 0,\n\t\t\tr, - t, 0, r, t, 0,\n\n\t\t\t// (±φ, 0, ±1/φ)\n\t\t\t- t, 0, - r, t, 0, - r,\n\t\t\t- t, 0, r, t, 0, r\n\t\t];\n\n\t\tconst indices = [\n\t\t\t3, 11, 7, \t3, 7, 15, \t3, 15, 13,\n\t\t\t7, 19, 17, \t7, 17, 6, \t7, 6, 15,\n\t\t\t17, 4, 8, \t17, 8, 10, \t17, 10, 6,\n\t\t\t8, 0, 16, \t8, 16, 2, \t8, 2, 10,\n\t\t\t0, 12, 1, \t0, 1, 18, \t0, 18, 16,\n\t\t\t6, 10, 2, \t6, 2, 13, \t6, 13, 15,\n\t\t\t2, 16, 18, \t2, 18, 3, \t2, 3, 13,\n\t\t\t18, 1, 9, \t18, 9, 11, \t18, 11, 3,\n\t\t\t4, 14, 12, \t4, 12, 0, \t4, 0, 8,\n\t\t\t11, 9, 5, \t11, 5, 19, \t11, 19, 7,\n\t\t\t19, 5, 14, \t19, 14, 4, \t19, 4, 17,\n\t\t\t1, 12, 14, \t1, 14, 5, \t1, 5, 9\n\t\t];\n\n\t\tsuper( vertices, indices, radius, detail );\n\n\t\tthis.type = 'DodecahedronGeometry';\n\n\t\tthis.parameters = {\n\t\t\tradius: radius,\n\t\t\tdetail: detail\n\t\t};\n\n\t}\n\n}\n\nconst _v0$2 = new Vector3();\nconst _v1$5 = new Vector3();\nconst _normal$1 = new Vector3();\nconst _triangle = new Triangle();\n\nclass EdgesGeometry extends BufferGeometry {\n\n\tconstructor( geometry, thresholdAngle ) {\n\n\t\tsuper();\n\n\t\tthis.type = 'EdgesGeometry';\n\n\t\tthis.parameters = {\n\t\t\tthresholdAngle: thresholdAngle\n\t\t};\n\n\t\tthresholdAngle = ( thresholdAngle !== undefined ) ? thresholdAngle : 1;\n\n\t\tif ( geometry.isGeometry === true ) {\n\n\t\t\tconsole.error( 'THREE.EdgesGeometry no longer supports THREE.Geometry. Use THREE.BufferGeometry instead.' );\n\t\t\treturn;\n\n\t\t}\n\n\t\tconst precisionPoints = 4;\n\t\tconst precision = Math.pow( 10, precisionPoints );\n\t\tconst thresholdDot = Math.cos( MathUtils.DEG2RAD * thresholdAngle );\n\n\t\tconst indexAttr = geometry.getIndex();\n\t\tconst positionAttr = geometry.getAttribute( 'position' );\n\t\tconst indexCount = indexAttr ? indexAttr.count : positionAttr.count;\n\n\t\tconst indexArr = [ 0, 0, 0 ];\n\t\tconst vertKeys = [ 'a', 'b', 'c' ];\n\t\tconst hashes = new Array( 3 );\n\n\t\tconst edgeData = {};\n\t\tconst vertices = [];\n\t\tfor ( let i = 0; i < indexCount; i += 3 ) {\n\n\t\t\tif ( indexAttr ) {\n\n\t\t\t\tindexArr[ 0 ] = indexAttr.getX( i );\n\t\t\t\tindexArr[ 1 ] = indexAttr.getX( i + 1 );\n\t\t\t\tindexArr[ 2 ] = indexAttr.getX( i + 2 );\n\n\t\t\t} else {\n\n\t\t\t\tindexArr[ 0 ] = i;\n\t\t\t\tindexArr[ 1 ] = i + 1;\n\t\t\t\tindexArr[ 2 ] = i + 2;\n\n\t\t\t}\n\n\t\t\tconst { a, b, c } = _triangle;\n\t\t\ta.fromBufferAttribute( positionAttr, indexArr[ 0 ] );\n\t\t\tb.fromBufferAttribute( positionAttr, indexArr[ 1 ] );\n\t\t\tc.fromBufferAttribute( positionAttr, indexArr[ 2 ] );\n\t\t\t_triangle.getNormal( _normal$1 );\n\n\t\t\t// create hashes for the edge from the vertices\n\t\t\thashes[ 0 ] = `${ Math.round( a.x * precision ) },${ Math.round( a.y * precision ) },${ Math.round( a.z * precision ) }`;\n\t\t\thashes[ 1 ] = `${ Math.round( b.x * precision ) },${ Math.round( b.y * precision ) },${ Math.round( b.z * precision ) }`;\n\t\t\thashes[ 2 ] = `${ Math.round( c.x * precision ) },${ Math.round( c.y * precision ) },${ Math.round( c.z * precision ) }`;\n\n\t\t\t// skip degenerate triangles\n\t\t\tif ( hashes[ 0 ] === hashes[ 1 ] || hashes[ 1 ] === hashes[ 2 ] || hashes[ 2 ] === hashes[ 0 ] ) {\n\n\t\t\t\tcontinue;\n\n\t\t\t}\n\n\t\t\t// iterate over every edge\n\t\t\tfor ( let j = 0; j < 3; j ++ ) {\n\n\t\t\t\t// get the first and next vertex making up the edge\n\t\t\t\tconst jNext = ( j + 1 ) % 3;\n\t\t\t\tconst vecHash0 = hashes[ j ];\n\t\t\t\tconst vecHash1 = hashes[ jNext ];\n\t\t\t\tconst v0 = _triangle[ vertKeys[ j ] ];\n\t\t\t\tconst v1 = _triangle[ vertKeys[ jNext ] ];\n\n\t\t\t\tconst hash = `${ vecHash0 }_${ vecHash1 }`;\n\t\t\t\tconst reverseHash = `${ vecHash1 }_${ vecHash0 }`;\n\n\t\t\t\tif ( reverseHash in edgeData && edgeData[ reverseHash ] ) {\n\n\t\t\t\t\t// if we found a sibling edge add it into the vertex array if\n\t\t\t\t\t// it meets the angle threshold and delete the edge from the map.\n\t\t\t\t\tif ( _normal$1.dot( edgeData[ reverseHash ].normal ) <= thresholdDot ) {\n\n\t\t\t\t\t\tvertices.push( v0.x, v0.y, v0.z );\n\t\t\t\t\t\tvertices.push( v1.x, v1.y, v1.z );\n\n\t\t\t\t\t}\n\n\t\t\t\t\tedgeData[ reverseHash ] = null;\n\n\t\t\t\t} else if ( ! ( hash in edgeData ) ) {\n\n\t\t\t\t\t// if we've already got an edge here then skip adding a new one\n\t\t\t\t\tedgeData[ hash ] = {\n\n\t\t\t\t\t\tindex0: indexArr[ j ],\n\t\t\t\t\t\tindex1: indexArr[ jNext ],\n\t\t\t\t\t\tnormal: _normal$1.clone(),\n\n\t\t\t\t\t};\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\t// iterate over all remaining, unmatched edges and add them to the vertex array\n\t\tfor ( const key in edgeData ) {\n\n\t\t\tif ( edgeData[ key ] ) {\n\n\t\t\t\tconst { index0, index1 } = edgeData[ key ];\n\t\t\t\t_v0$2.fromBufferAttribute( positionAttr, index0 );\n\t\t\t\t_v1$5.fromBufferAttribute( positionAttr, index1 );\n\n\t\t\t\tvertices.push( _v0$2.x, _v0$2.y, _v0$2.z );\n\t\t\t\tvertices.push( _v1$5.x, _v1$5.y, _v1$5.z );\n\n\t\t\t}\n\n\t\t}\n\n\t\tthis.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\n\t}\n\n}\n\n/**\n * Port from https://github.com/mapbox/earcut (v2.2.2)\n */\n\nconst Earcut = {\n\n\ttriangulate: function ( data, holeIndices, dim ) {\n\n\t\tdim = dim || 2;\n\n\t\tconst hasHoles = holeIndices && holeIndices.length;\n\t\tconst outerLen = hasHoles ? holeIndices[ 0 ] * dim : data.length;\n\t\tlet outerNode = linkedList( data, 0, outerLen, dim, true );\n\t\tconst triangles = [];\n\n\t\tif ( ! outerNode || outerNode.next === outerNode.prev ) return triangles;\n\n\t\tlet minX, minY, maxX, maxY, x, y, invSize;\n\n\t\tif ( hasHoles ) outerNode = eliminateHoles( data, holeIndices, outerNode, dim );\n\n\t\t// if the shape is not too simple, we'll use z-order curve hash later; calculate polygon bbox\n\t\tif ( data.length > 80 * dim ) {\n\n\t\t\tminX = maxX = data[ 0 ];\n\t\t\tminY = maxY = data[ 1 ];\n\n\t\t\tfor ( let i = dim; i < outerLen; i += dim ) {\n\n\t\t\t\tx = data[ i ];\n\t\t\t\ty = data[ i + 1 ];\n\t\t\t\tif ( x < minX ) minX = x;\n\t\t\t\tif ( y < minY ) minY = y;\n\t\t\t\tif ( x > maxX ) maxX = x;\n\t\t\t\tif ( y > maxY ) maxY = y;\n\n\t\t\t}\n\n\t\t\t// minX, minY and invSize are later used to transform coords into integers for z-order calculation\n\t\t\tinvSize = Math.max( maxX - minX, maxY - minY );\n\t\t\tinvSize = invSize !== 0 ? 1 / invSize : 0;\n\n\t\t}\n\n\t\tearcutLinked( outerNode, triangles, dim, minX, minY, invSize );\n\n\t\treturn triangles;\n\n\t}\n\n};\n\n// create a circular doubly linked list from polygon points in the specified winding order\nfunction linkedList( data, start, end, dim, clockwise ) {\n\n\tlet i, last;\n\n\tif ( clockwise === ( signedArea( data, start, end, dim ) > 0 ) ) {\n\n\t\tfor ( i = start; i < end; i += dim ) last = insertNode( i, data[ i ], data[ i + 1 ], last );\n\n\t} else {\n\n\t\tfor ( i = end - dim; i >= start; i -= dim ) last = insertNode( i, data[ i ], data[ i + 1 ], last );\n\n\t}\n\n\tif ( last && equals( last, last.next ) ) {\n\n\t\tremoveNode( last );\n\t\tlast = last.next;\n\n\t}\n\n\treturn last;\n\n}\n\n// eliminate colinear or duplicate points\nfunction filterPoints( start, end ) {\n\n\tif ( ! start ) return start;\n\tif ( ! end ) end = start;\n\n\tlet p = start,\n\t\tagain;\n\tdo {\n\n\t\tagain = false;\n\n\t\tif ( ! p.steiner && ( equals( p, p.next ) || area( p.prev, p, p.next ) === 0 ) ) {\n\n\t\t\tremoveNode( p );\n\t\t\tp = end = p.prev;\n\t\t\tif ( p === p.next ) break;\n\t\t\tagain = true;\n\n\t\t} else {\n\n\t\t\tp = p.next;\n\n\t\t}\n\n\t} while ( again || p !== end );\n\n\treturn end;\n\n}\n\n// main ear slicing loop which triangulates a polygon (given as a linked list)\nfunction earcutLinked( ear, triangles, dim, minX, minY, invSize, pass ) {\n\n\tif ( ! ear ) return;\n\n\t// interlink polygon nodes in z-order\n\tif ( ! pass && invSize ) indexCurve( ear, minX, minY, invSize );\n\n\tlet stop = ear,\n\t\tprev, next;\n\n\t// iterate through ears, slicing them one by one\n\twhile ( ear.prev !== ear.next ) {\n\n\t\tprev = ear.prev;\n\t\tnext = ear.next;\n\n\t\tif ( invSize ? isEarHashed( ear, minX, minY, invSize ) : isEar( ear ) ) {\n\n\t\t\t// cut off the triangle\n\t\t\ttriangles.push( prev.i / dim );\n\t\t\ttriangles.push( ear.i / dim );\n\t\t\ttriangles.push( next.i / dim );\n\n\t\t\tremoveNode( ear );\n\n\t\t\t// skipping the next vertex leads to less sliver triangles\n\t\t\tear = next.next;\n\t\t\tstop = next.next;\n\n\t\t\tcontinue;\n\n\t\t}\n\n\t\tear = next;\n\n\t\t// if we looped through the whole remaining polygon and can't find any more ears\n\t\tif ( ear === stop ) {\n\n\t\t\t// try filtering points and slicing again\n\t\t\tif ( ! pass ) {\n\n\t\t\t\tearcutLinked( filterPoints( ear ), triangles, dim, minX, minY, invSize, 1 );\n\n\t\t\t\t// if this didn't work, try curing all small self-intersections locally\n\n\t\t\t} else if ( pass === 1 ) {\n\n\t\t\t\tear = cureLocalIntersections( filterPoints( ear ), triangles, dim );\n\t\t\t\tearcutLinked( ear, triangles, dim, minX, minY, invSize, 2 );\n\n\t\t\t\t// as a last resort, try splitting the remaining polygon into two\n\n\t\t\t} else if ( pass === 2 ) {\n\n\t\t\t\tsplitEarcut( ear, triangles, dim, minX, minY, invSize );\n\n\t\t\t}\n\n\t\t\tbreak;\n\n\t\t}\n\n\t}\n\n}\n\n// check whether a polygon node forms a valid ear with adjacent nodes\nfunction isEar( ear ) {\n\n\tconst a = ear.prev,\n\t\tb = ear,\n\t\tc = ear.next;\n\n\tif ( area( a, b, c ) >= 0 ) return false; // reflex, can't be an ear\n\n\t// now make sure we don't have other points inside the potential ear\n\tlet p = ear.next.next;\n\n\twhile ( p !== ear.prev ) {\n\n\t\tif ( pointInTriangle( a.x, a.y, b.x, b.y, c.x, c.y, p.x, p.y ) &&\n\t\t\tarea( p.prev, p, p.next ) >= 0 ) return false;\n\t\tp = p.next;\n\n\t}\n\n\treturn true;\n\n}\n\nfunction isEarHashed( ear, minX, minY, invSize ) {\n\n\tconst a = ear.prev,\n\t\tb = ear,\n\t\tc = ear.next;\n\n\tif ( area( a, b, c ) >= 0 ) return false; // reflex, can't be an ear\n\n\t// triangle bbox; min & max are calculated like this for speed\n\tconst minTX = a.x < b.x ? ( a.x < c.x ? a.x : c.x ) : ( b.x < c.x ? b.x : c.x ),\n\t\tminTY = a.y < b.y ? ( a.y < c.y ? a.y : c.y ) : ( b.y < c.y ? b.y : c.y ),\n\t\tmaxTX = a.x > b.x ? ( a.x > c.x ? a.x : c.x ) : ( b.x > c.x ? b.x : c.x ),\n\t\tmaxTY = a.y > b.y ? ( a.y > c.y ? a.y : c.y ) : ( b.y > c.y ? b.y : c.y );\n\n\t// z-order range for the current triangle bbox;\n\tconst minZ = zOrder( minTX, minTY, minX, minY, invSize ),\n\t\tmaxZ = zOrder( maxTX, maxTY, minX, minY, invSize );\n\n\tlet p = ear.prevZ,\n\t\tn = ear.nextZ;\n\n\t// look for points inside the triangle in both directions\n\twhile ( p && p.z >= minZ && n && n.z <= maxZ ) {\n\n\t\tif ( p !== ear.prev && p !== ear.next &&\n\t\t\tpointInTriangle( a.x, a.y, b.x, b.y, c.x, c.y, p.x, p.y ) &&\n\t\t\tarea( p.prev, p, p.next ) >= 0 ) return false;\n\t\tp = p.prevZ;\n\n\t\tif ( n !== ear.prev && n !== ear.next &&\n\t\t\tpointInTriangle( a.x, a.y, b.x, b.y, c.x, c.y, n.x, n.y ) &&\n\t\t\tarea( n.prev, n, n.next ) >= 0 ) return false;\n\t\tn = n.nextZ;\n\n\t}\n\n\t// look for remaining points in decreasing z-order\n\twhile ( p && p.z >= minZ ) {\n\n\t\tif ( p !== ear.prev && p !== ear.next &&\n\t\t\tpointInTriangle( a.x, a.y, b.x, b.y, c.x, c.y, p.x, p.y ) &&\n\t\t\tarea( p.prev, p, p.next ) >= 0 ) return false;\n\t\tp = p.prevZ;\n\n\t}\n\n\t// look for remaining points in increasing z-order\n\twhile ( n && n.z <= maxZ ) {\n\n\t\tif ( n !== ear.prev && n !== ear.next &&\n\t\t\tpointInTriangle( a.x, a.y, b.x, b.y, c.x, c.y, n.x, n.y ) &&\n\t\t\tarea( n.prev, n, n.next ) >= 0 ) return false;\n\t\tn = n.nextZ;\n\n\t}\n\n\treturn true;\n\n}\n\n// go through all polygon nodes and cure small local self-intersections\nfunction cureLocalIntersections( start, triangles, dim ) {\n\n\tlet p = start;\n\tdo {\n\n\t\tconst a = p.prev,\n\t\t\tb = p.next.next;\n\n\t\tif ( ! equals( a, b ) && intersects( a, p, p.next, b ) && locallyInside( a, b ) && locallyInside( b, a ) ) {\n\n\t\t\ttriangles.push( a.i / dim );\n\t\t\ttriangles.push( p.i / dim );\n\t\t\ttriangles.push( b.i / dim );\n\n\t\t\t// remove two nodes involved\n\t\t\tremoveNode( p );\n\t\t\tremoveNode( p.next );\n\n\t\t\tp = start = b;\n\n\t\t}\n\n\t\tp = p.next;\n\n\t} while ( p !== start );\n\n\treturn filterPoints( p );\n\n}\n\n// try splitting polygon into two and triangulate them independently\nfunction splitEarcut( start, triangles, dim, minX, minY, invSize ) {\n\n\t// look for a valid diagonal that divides the polygon into two\n\tlet a = start;\n\tdo {\n\n\t\tlet b = a.next.next;\n\t\twhile ( b !== a.prev ) {\n\n\t\t\tif ( a.i !== b.i && isValidDiagonal( a, b ) ) {\n\n\t\t\t\t// split the polygon in two by the diagonal\n\t\t\t\tlet c = splitPolygon( a, b );\n\n\t\t\t\t// filter colinear points around the cuts\n\t\t\t\ta = filterPoints( a, a.next );\n\t\t\t\tc = filterPoints( c, c.next );\n\n\t\t\t\t// run earcut on each half\n\t\t\t\tearcutLinked( a, triangles, dim, minX, minY, invSize );\n\t\t\t\tearcutLinked( c, triangles, dim, minX, minY, invSize );\n\t\t\t\treturn;\n\n\t\t\t}\n\n\t\t\tb = b.next;\n\n\t\t}\n\n\t\ta = a.next;\n\n\t} while ( a !== start );\n\n}\n\n// link every hole into the outer loop, producing a single-ring polygon without holes\nfunction eliminateHoles( data, holeIndices, outerNode, dim ) {\n\n\tconst queue = [];\n\tlet i, len, start, end, list;\n\n\tfor ( i = 0, len = holeIndices.length; i < len; i ++ ) {\n\n\t\tstart = holeIndices[ i ] * dim;\n\t\tend = i < len - 1 ? holeIndices[ i + 1 ] * dim : data.length;\n\t\tlist = linkedList( data, start, end, dim, false );\n\t\tif ( list === list.next ) list.steiner = true;\n\t\tqueue.push( getLeftmost( list ) );\n\n\t}\n\n\tqueue.sort( compareX );\n\n\t// process holes from left to right\n\tfor ( i = 0; i < queue.length; i ++ ) {\n\n\t\teliminateHole( queue[ i ], outerNode );\n\t\touterNode = filterPoints( outerNode, outerNode.next );\n\n\t}\n\n\treturn outerNode;\n\n}\n\nfunction compareX( a, b ) {\n\n\treturn a.x - b.x;\n\n}\n\n// find a bridge between vertices that connects hole with an outer ring and and link it\nfunction eliminateHole( hole, outerNode ) {\n\n\touterNode = findHoleBridge( hole, outerNode );\n\tif ( outerNode ) {\n\n\t\tconst b = splitPolygon( outerNode, hole );\n\n\t\t// filter collinear points around the cuts\n\t\tfilterPoints( outerNode, outerNode.next );\n\t\tfilterPoints( b, b.next );\n\n\t}\n\n}\n\n// David Eberly's algorithm for finding a bridge between hole and outer polygon\nfunction findHoleBridge( hole, outerNode ) {\n\n\tlet p = outerNode;\n\tconst hx = hole.x;\n\tconst hy = hole.y;\n\tlet qx = - Infinity, m;\n\n\t// find a segment intersected by a ray from the hole's leftmost point to the left;\n\t// segment's endpoint with lesser x will be potential connection point\n\tdo {\n\n\t\tif ( hy <= p.y && hy >= p.next.y && p.next.y !== p.y ) {\n\n\t\t\tconst x = p.x + ( hy - p.y ) * ( p.next.x - p.x ) / ( p.next.y - p.y );\n\t\t\tif ( x <= hx && x > qx ) {\n\n\t\t\t\tqx = x;\n\t\t\t\tif ( x === hx ) {\n\n\t\t\t\t\tif ( hy === p.y ) return p;\n\t\t\t\t\tif ( hy === p.next.y ) return p.next;\n\n\t\t\t\t}\n\n\t\t\t\tm = p.x < p.next.x ? p : p.next;\n\n\t\t\t}\n\n\t\t}\n\n\t\tp = p.next;\n\n\t} while ( p !== outerNode );\n\n\tif ( ! m ) return null;\n\n\tif ( hx === qx ) return m; // hole touches outer segment; pick leftmost endpoint\n\n\t// look for points inside the triangle of hole point, segment intersection and endpoint;\n\t// if there are no points found, we have a valid connection;\n\t// otherwise choose the point of the minimum angle with the ray as connection point\n\n\tconst stop = m,\n\t\tmx = m.x,\n\t\tmy = m.y;\n\tlet tanMin = Infinity, tan;\n\n\tp = m;\n\n\tdo {\n\n\t\tif ( hx >= p.x && p.x >= mx && hx !== p.x &&\n\t\t\t\tpointInTriangle( hy < my ? hx : qx, hy, mx, my, hy < my ? qx : hx, hy, p.x, p.y ) ) {\n\n\t\t\ttan = Math.abs( hy - p.y ) / ( hx - p.x ); // tangential\n\n\t\t\tif ( locallyInside( p, hole ) && ( tan < tanMin || ( tan === tanMin && ( p.x > m.x || ( p.x === m.x && sectorContainsSector( m, p ) ) ) ) ) ) {\n\n\t\t\t\tm = p;\n\t\t\t\ttanMin = tan;\n\n\t\t\t}\n\n\t\t}\n\n\t\tp = p.next;\n\n\t} while ( p !== stop );\n\n\treturn m;\n\n}\n\n// whether sector in vertex m contains sector in vertex p in the same coordinates\nfunction sectorContainsSector( m, p ) {\n\n\treturn area( m.prev, m, p.prev ) < 0 && area( p.next, m, m.next ) < 0;\n\n}\n\n// interlink polygon nodes in z-order\nfunction indexCurve( start, minX, minY, invSize ) {\n\n\tlet p = start;\n\tdo {\n\n\t\tif ( p.z === null ) p.z = zOrder( p.x, p.y, minX, minY, invSize );\n\t\tp.prevZ = p.prev;\n\t\tp.nextZ = p.next;\n\t\tp = p.next;\n\n\t} while ( p !== start );\n\n\tp.prevZ.nextZ = null;\n\tp.prevZ = null;\n\n\tsortLinked( p );\n\n}\n\n// Simon Tatham's linked list merge sort algorithm\n// http://www.chiark.greenend.org.uk/~sgtatham/algorithms/listsort.html\nfunction sortLinked( list ) {\n\n\tlet i, p, q, e, tail, numMerges, pSize, qSize,\n\t\tinSize = 1;\n\n\tdo {\n\n\t\tp = list;\n\t\tlist = null;\n\t\ttail = null;\n\t\tnumMerges = 0;\n\n\t\twhile ( p ) {\n\n\t\t\tnumMerges ++;\n\t\t\tq = p;\n\t\t\tpSize = 0;\n\t\t\tfor ( i = 0; i < inSize; i ++ ) {\n\n\t\t\t\tpSize ++;\n\t\t\t\tq = q.nextZ;\n\t\t\t\tif ( ! q ) break;\n\n\t\t\t}\n\n\t\t\tqSize = inSize;\n\n\t\t\twhile ( pSize > 0 || ( qSize > 0 && q ) ) {\n\n\t\t\t\tif ( pSize !== 0 && ( qSize === 0 || ! q || p.z <= q.z ) ) {\n\n\t\t\t\t\te = p;\n\t\t\t\t\tp = p.nextZ;\n\t\t\t\t\tpSize --;\n\n\t\t\t\t} else {\n\n\t\t\t\t\te = q;\n\t\t\t\t\tq = q.nextZ;\n\t\t\t\t\tqSize --;\n\n\t\t\t\t}\n\n\t\t\t\tif ( tail ) tail.nextZ = e;\n\t\t\t\telse list = e;\n\n\t\t\t\te.prevZ = tail;\n\t\t\t\ttail = e;\n\n\t\t\t}\n\n\t\t\tp = q;\n\n\t\t}\n\n\t\ttail.nextZ = null;\n\t\tinSize *= 2;\n\n\t} while ( numMerges > 1 );\n\n\treturn list;\n\n}\n\n// z-order of a point given coords and inverse of the longer side of data bbox\nfunction zOrder( x, y, minX, minY, invSize ) {\n\n\t// coords are transformed into non-negative 15-bit integer range\n\tx = 32767 * ( x - minX ) * invSize;\n\ty = 32767 * ( y - minY ) * invSize;\n\n\tx = ( x | ( x << 8 ) ) & 0x00FF00FF;\n\tx = ( x | ( x << 4 ) ) & 0x0F0F0F0F;\n\tx = ( x | ( x << 2 ) ) & 0x33333333;\n\tx = ( x | ( x << 1 ) ) & 0x55555555;\n\n\ty = ( y | ( y << 8 ) ) & 0x00FF00FF;\n\ty = ( y | ( y << 4 ) ) & 0x0F0F0F0F;\n\ty = ( y | ( y << 2 ) ) & 0x33333333;\n\ty = ( y | ( y << 1 ) ) & 0x55555555;\n\n\treturn x | ( y << 1 );\n\n}\n\n// find the leftmost node of a polygon ring\nfunction getLeftmost( start ) {\n\n\tlet p = start,\n\t\tleftmost = start;\n\tdo {\n\n\t\tif ( p.x < leftmost.x || ( p.x === leftmost.x && p.y < leftmost.y ) ) leftmost = p;\n\t\tp = p.next;\n\n\t} while ( p !== start );\n\n\treturn leftmost;\n\n}\n\n// check if a point lies within a convex triangle\nfunction pointInTriangle( ax, ay, bx, by, cx, cy, px, py ) {\n\n\treturn ( cx - px ) * ( ay - py ) - ( ax - px ) * ( cy - py ) >= 0 &&\n\t\t\t( ax - px ) * ( by - py ) - ( bx - px ) * ( ay - py ) >= 0 &&\n\t\t\t( bx - px ) * ( cy - py ) - ( cx - px ) * ( by - py ) >= 0;\n\n}\n\n// check if a diagonal between two polygon nodes is valid (lies in polygon interior)\nfunction isValidDiagonal( a, b ) {\n\n\treturn a.next.i !== b.i && a.prev.i !== b.i && ! intersectsPolygon( a, b ) && // dones't intersect other edges\n\t\t( locallyInside( a, b ) && locallyInside( b, a ) && middleInside( a, b ) && // locally visible\n\t\t( area( a.prev, a, b.prev ) || area( a, b.prev, b ) ) || // does not create opposite-facing sectors\n\t\tequals( a, b ) && area( a.prev, a, a.next ) > 0 && area( b.prev, b, b.next ) > 0 ); // special zero-length case\n\n}\n\n// signed area of a triangle\nfunction area( p, q, r ) {\n\n\treturn ( q.y - p.y ) * ( r.x - q.x ) - ( q.x - p.x ) * ( r.y - q.y );\n\n}\n\n// check if two points are equal\nfunction equals( p1, p2 ) {\n\n\treturn p1.x === p2.x && p1.y === p2.y;\n\n}\n\n// check if two segments intersect\nfunction intersects( p1, q1, p2, q2 ) {\n\n\tconst o1 = sign( area( p1, q1, p2 ) );\n\tconst o2 = sign( area( p1, q1, q2 ) );\n\tconst o3 = sign( area( p2, q2, p1 ) );\n\tconst o4 = sign( area( p2, q2, q1 ) );\n\n\tif ( o1 !== o2 && o3 !== o4 ) return true; // general case\n\n\tif ( o1 === 0 && onSegment( p1, p2, q1 ) ) return true; // p1, q1 and p2 are collinear and p2 lies on p1q1\n\tif ( o2 === 0 && onSegment( p1, q2, q1 ) ) return true; // p1, q1 and q2 are collinear and q2 lies on p1q1\n\tif ( o3 === 0 && onSegment( p2, p1, q2 ) ) return true; // p2, q2 and p1 are collinear and p1 lies on p2q2\n\tif ( o4 === 0 && onSegment( p2, q1, q2 ) ) return true; // p2, q2 and q1 are collinear and q1 lies on p2q2\n\n\treturn false;\n\n}\n\n// for collinear points p, q, r, check if point q lies on segment pr\nfunction onSegment( p, q, r ) {\n\n\treturn q.x <= Math.max( p.x, r.x ) && q.x >= Math.min( p.x, r.x ) && q.y <= Math.max( p.y, r.y ) && q.y >= Math.min( p.y, r.y );\n\n}\n\nfunction sign( num ) {\n\n\treturn num > 0 ? 1 : num < 0 ? - 1 : 0;\n\n}\n\n// check if a polygon diagonal intersects any polygon segments\nfunction intersectsPolygon( a, b ) {\n\n\tlet p = a;\n\tdo {\n\n\t\tif ( p.i !== a.i && p.next.i !== a.i && p.i !== b.i && p.next.i !== b.i &&\n\t\t\t\tintersects( p, p.next, a, b ) ) return true;\n\t\tp = p.next;\n\n\t} while ( p !== a );\n\n\treturn false;\n\n}\n\n// check if a polygon diagonal is locally inside the polygon\nfunction locallyInside( a, b ) {\n\n\treturn area( a.prev, a, a.next ) < 0 ?\n\t\tarea( a, b, a.next ) >= 0 && area( a, a.prev, b ) >= 0 :\n\t\tarea( a, b, a.prev ) < 0 || area( a, a.next, b ) < 0;\n\n}\n\n// check if the middle point of a polygon diagonal is inside the polygon\nfunction middleInside( a, b ) {\n\n\tlet p = a,\n\t\tinside = false;\n\tconst px = ( a.x + b.x ) / 2,\n\t\tpy = ( a.y + b.y ) / 2;\n\tdo {\n\n\t\tif ( ( ( p.y > py ) !== ( p.next.y > py ) ) && p.next.y !== p.y &&\n\t\t\t\t( px < ( p.next.x - p.x ) * ( py - p.y ) / ( p.next.y - p.y ) + p.x ) )\n\t\t\tinside = ! inside;\n\t\tp = p.next;\n\n\t} while ( p !== a );\n\n\treturn inside;\n\n}\n\n// link two polygon vertices with a bridge; if the vertices belong to the same ring, it splits polygon into two;\n// if one belongs to the outer ring and another to a hole, it merges it into a single ring\nfunction splitPolygon( a, b ) {\n\n\tconst a2 = new Node( a.i, a.x, a.y ),\n\t\tb2 = new Node( b.i, b.x, b.y ),\n\t\tan = a.next,\n\t\tbp = b.prev;\n\n\ta.next = b;\n\tb.prev = a;\n\n\ta2.next = an;\n\tan.prev = a2;\n\n\tb2.next = a2;\n\ta2.prev = b2;\n\n\tbp.next = b2;\n\tb2.prev = bp;\n\n\treturn b2;\n\n}\n\n// create a node and optionally link it with previous one (in a circular doubly linked list)\nfunction insertNode( i, x, y, last ) {\n\n\tconst p = new Node( i, x, y );\n\n\tif ( ! last ) {\n\n\t\tp.prev = p;\n\t\tp.next = p;\n\n\t} else {\n\n\t\tp.next = last.next;\n\t\tp.prev = last;\n\t\tlast.next.prev = p;\n\t\tlast.next = p;\n\n\t}\n\n\treturn p;\n\n}\n\nfunction removeNode( p ) {\n\n\tp.next.prev = p.prev;\n\tp.prev.next = p.next;\n\n\tif ( p.prevZ ) p.prevZ.nextZ = p.nextZ;\n\tif ( p.nextZ ) p.nextZ.prevZ = p.prevZ;\n\n}\n\nfunction Node( i, x, y ) {\n\n\t// vertex index in coordinates array\n\tthis.i = i;\n\n\t// vertex coordinates\n\tthis.x = x;\n\tthis.y = y;\n\n\t// previous and next vertex nodes in a polygon ring\n\tthis.prev = null;\n\tthis.next = null;\n\n\t// z-order curve value\n\tthis.z = null;\n\n\t// previous and next nodes in z-order\n\tthis.prevZ = null;\n\tthis.nextZ = null;\n\n\t// indicates whether this is a steiner point\n\tthis.steiner = false;\n\n}\n\nfunction signedArea( data, start, end, dim ) {\n\n\tlet sum = 0;\n\tfor ( let i = start, j = end - dim; i < end; i += dim ) {\n\n\t\tsum += ( data[ j ] - data[ i ] ) * ( data[ i + 1 ] + data[ j + 1 ] );\n\t\tj = i;\n\n\t}\n\n\treturn sum;\n\n}\n\nconst ShapeUtils = {\n\n\t// calculate area of the contour polygon\n\n\tarea: function ( contour ) {\n\n\t\tconst n = contour.length;\n\t\tlet a = 0.0;\n\n\t\tfor ( let p = n - 1, q = 0; q < n; p = q ++ ) {\n\n\t\t\ta += contour[ p ].x * contour[ q ].y - contour[ q ].x * contour[ p ].y;\n\n\t\t}\n\n\t\treturn a * 0.5;\n\n\t},\n\n\tisClockWise: function ( pts ) {\n\n\t\treturn ShapeUtils.area( pts ) < 0;\n\n\t},\n\n\ttriangulateShape: function ( contour, holes ) {\n\n\t\tconst vertices = []; // flat array of vertices like [ x0,y0, x1,y1, x2,y2, ... ]\n\t\tconst holeIndices = []; // array of hole indices\n\t\tconst faces = []; // final array of vertex indices like [ [ a,b,d ], [ b,c,d ] ]\n\n\t\tremoveDupEndPts( contour );\n\t\taddContour( vertices, contour );\n\n\t\t//\n\n\t\tlet holeIndex = contour.length;\n\n\t\tholes.forEach( removeDupEndPts );\n\n\t\tfor ( let i = 0; i < holes.length; i ++ ) {\n\n\t\t\tholeIndices.push( holeIndex );\n\t\t\tholeIndex += holes[ i ].length;\n\t\t\taddContour( vertices, holes[ i ] );\n\n\t\t}\n\n\t\t//\n\n\t\tconst triangles = Earcut.triangulate( vertices, holeIndices );\n\n\t\t//\n\n\t\tfor ( let i = 0; i < triangles.length; i += 3 ) {\n\n\t\t\tfaces.push( triangles.slice( i, i + 3 ) );\n\n\t\t}\n\n\t\treturn faces;\n\n\t}\n\n};\n\nfunction removeDupEndPts( points ) {\n\n\tconst l = points.length;\n\n\tif ( l > 2 && points[ l - 1 ].equals( points[ 0 ] ) ) {\n\n\t\tpoints.pop();\n\n\t}\n\n}\n\nfunction addContour( vertices, contour ) {\n\n\tfor ( let i = 0; i < contour.length; i ++ ) {\n\n\t\tvertices.push( contour[ i ].x );\n\t\tvertices.push( contour[ i ].y );\n\n\t}\n\n}\n\n/**\n * Creates extruded geometry from a path shape.\n *\n * parameters = {\n *\n *  curveSegments: <int>, // number of points on the curves\n *  steps: <int>, // number of points for z-side extrusions / used for subdividing segments of extrude spline too\n *  depth: <float>, // Depth to extrude the shape\n *\n *  bevelEnabled: <bool>, // turn on bevel\n *  bevelThickness: <float>, // how deep into the original shape bevel goes\n *  bevelSize: <float>, // how far from shape outline (including bevelOffset) is bevel\n *  bevelOffset: <float>, // how far from shape outline does bevel start\n *  bevelSegments: <int>, // number of bevel layers\n *\n *  extrudePath: <THREE.Curve> // curve to extrude shape along\n *\n *  UVGenerator: <Object> // object that provides UV generator functions\n *\n * }\n */\n\nclass ExtrudeGeometry extends BufferGeometry {\n\n\tconstructor( shapes, options ) {\n\n\t\tsuper();\n\n\t\tthis.type = 'ExtrudeGeometry';\n\n\t\tthis.parameters = {\n\t\t\tshapes: shapes,\n\t\t\toptions: options\n\t\t};\n\n\t\tshapes = Array.isArray( shapes ) ? shapes : [ shapes ];\n\n\t\tconst scope = this;\n\n\t\tconst verticesArray = [];\n\t\tconst uvArray = [];\n\n\t\tfor ( let i = 0, l = shapes.length; i < l; i ++ ) {\n\n\t\t\tconst shape = shapes[ i ];\n\t\t\taddShape( shape );\n\n\t\t}\n\n\t\t// build geometry\n\n\t\tthis.setAttribute( 'position', new Float32BufferAttribute( verticesArray, 3 ) );\n\t\tthis.setAttribute( 'uv', new Float32BufferAttribute( uvArray, 2 ) );\n\n\t\tthis.computeVertexNormals();\n\n\t\t// functions\n\n\t\tfunction addShape( shape ) {\n\n\t\t\tconst placeholder = [];\n\n\t\t\t// options\n\n\t\t\tconst curveSegments = options.curveSegments !== undefined ? options.curveSegments : 12;\n\t\t\tconst steps = options.steps !== undefined ? options.steps : 1;\n\t\t\tlet depth = options.depth !== undefined ? options.depth : 100;\n\n\t\t\tlet bevelEnabled = options.bevelEnabled !== undefined ? options.bevelEnabled : true;\n\t\t\tlet bevelThickness = options.bevelThickness !== undefined ? options.bevelThickness : 6;\n\t\t\tlet bevelSize = options.bevelSize !== undefined ? options.bevelSize : bevelThickness - 2;\n\t\t\tlet bevelOffset = options.bevelOffset !== undefined ? options.bevelOffset : 0;\n\t\t\tlet bevelSegments = options.bevelSegments !== undefined ? options.bevelSegments : 3;\n\n\t\t\tconst extrudePath = options.extrudePath;\n\n\t\t\tconst uvgen = options.UVGenerator !== undefined ? options.UVGenerator : WorldUVGenerator;\n\n\t\t\t// deprecated options\n\n\t\t\tif ( options.amount !== undefined ) {\n\n\t\t\t\tconsole.warn( 'THREE.ExtrudeBufferGeometry: amount has been renamed to depth.' );\n\t\t\t\tdepth = options.amount;\n\n\t\t\t}\n\n\t\t\t//\n\n\t\t\tlet extrudePts, extrudeByPath = false;\n\t\t\tlet splineTube, binormal, normal, position2;\n\n\t\t\tif ( extrudePath ) {\n\n\t\t\t\textrudePts = extrudePath.getSpacedPoints( steps );\n\n\t\t\t\textrudeByPath = true;\n\t\t\t\tbevelEnabled = false; // bevels not supported for path extrusion\n\n\t\t\t\t// SETUP TNB variables\n\n\t\t\t\t// TODO1 - have a .isClosed in spline?\n\n\t\t\t\tsplineTube = extrudePath.computeFrenetFrames( steps, false );\n\n\t\t\t\t// console.log(splineTube, 'splineTube', splineTube.normals.length, 'steps', steps, 'extrudePts', extrudePts.length);\n\n\t\t\t\tbinormal = new Vector3();\n\t\t\t\tnormal = new Vector3();\n\t\t\t\tposition2 = new Vector3();\n\n\t\t\t}\n\n\t\t\t// Safeguards if bevels are not enabled\n\n\t\t\tif ( ! bevelEnabled ) {\n\n\t\t\t\tbevelSegments = 0;\n\t\t\t\tbevelThickness = 0;\n\t\t\t\tbevelSize = 0;\n\t\t\t\tbevelOffset = 0;\n\n\t\t\t}\n\n\t\t\t// Variables initialization\n\n\t\t\tconst shapePoints = shape.extractPoints( curveSegments );\n\n\t\t\tlet vertices = shapePoints.shape;\n\t\t\tconst holes = shapePoints.holes;\n\n\t\t\tconst reverse = ! ShapeUtils.isClockWise( vertices );\n\n\t\t\tif ( reverse ) {\n\n\t\t\t\tvertices = vertices.reverse();\n\n\t\t\t\t// Maybe we should also check if holes are in the opposite direction, just to be safe ...\n\n\t\t\t\tfor ( let h = 0, hl = holes.length; h < hl; h ++ ) {\n\n\t\t\t\t\tconst ahole = holes[ h ];\n\n\t\t\t\t\tif ( ShapeUtils.isClockWise( ahole ) ) {\n\n\t\t\t\t\t\tholes[ h ] = ahole.reverse();\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\n\t\t\tconst faces = ShapeUtils.triangulateShape( vertices, holes );\n\n\t\t\t/* Vertices */\n\n\t\t\tconst contour = vertices; // vertices has all points but contour has only points of circumference\n\n\t\t\tfor ( let h = 0, hl = holes.length; h < hl; h ++ ) {\n\n\t\t\t\tconst ahole = holes[ h ];\n\n\t\t\t\tvertices = vertices.concat( ahole );\n\n\t\t\t}\n\n\n\t\t\tfunction scalePt2( pt, vec, size ) {\n\n\t\t\t\tif ( ! vec ) console.error( 'THREE.ExtrudeGeometry: vec does not exist' );\n\n\t\t\t\treturn vec.clone().multiplyScalar( size ).add( pt );\n\n\t\t\t}\n\n\t\t\tconst vlen = vertices.length, flen = faces.length;\n\n\n\t\t\t// Find directions for point movement\n\n\n\t\t\tfunction getBevelVec( inPt, inPrev, inNext ) {\n\n\t\t\t\t// computes for inPt the corresponding point inPt' on a new contour\n\t\t\t\t//   shifted by 1 unit (length of normalized vector) to the left\n\t\t\t\t// if we walk along contour clockwise, this new contour is outside the old one\n\t\t\t\t//\n\t\t\t\t// inPt' is the intersection of the two lines parallel to the two\n\t\t\t\t//  adjacent edges of inPt at a distance of 1 unit on the left side.\n\n\t\t\t\tlet v_trans_x, v_trans_y, shrink_by; // resulting translation vector for inPt\n\n\t\t\t\t// good reading for geometry algorithms (here: line-line intersection)\n\t\t\t\t// http://geomalgorithms.com/a05-_intersect-1.html\n\n\t\t\t\tconst v_prev_x = inPt.x - inPrev.x,\n\t\t\t\t\tv_prev_y = inPt.y - inPrev.y;\n\t\t\t\tconst v_next_x = inNext.x - inPt.x,\n\t\t\t\t\tv_next_y = inNext.y - inPt.y;\n\n\t\t\t\tconst v_prev_lensq = ( v_prev_x * v_prev_x + v_prev_y * v_prev_y );\n\n\t\t\t\t// check for collinear edges\n\t\t\t\tconst collinear0 = ( v_prev_x * v_next_y - v_prev_y * v_next_x );\n\n\t\t\t\tif ( Math.abs( collinear0 ) > Number.EPSILON ) {\n\n\t\t\t\t\t// not collinear\n\n\t\t\t\t\t// length of vectors for normalizing\n\n\t\t\t\t\tconst v_prev_len = Math.sqrt( v_prev_lensq );\n\t\t\t\t\tconst v_next_len = Math.sqrt( v_next_x * v_next_x + v_next_y * v_next_y );\n\n\t\t\t\t\t// shift adjacent points by unit vectors to the left\n\n\t\t\t\t\tconst ptPrevShift_x = ( inPrev.x - v_prev_y / v_prev_len );\n\t\t\t\t\tconst ptPrevShift_y = ( inPrev.y + v_prev_x / v_prev_len );\n\n\t\t\t\t\tconst ptNextShift_x = ( inNext.x - v_next_y / v_next_len );\n\t\t\t\t\tconst ptNextShift_y = ( inNext.y + v_next_x / v_next_len );\n\n\t\t\t\t\t// scaling factor for v_prev to intersection point\n\n\t\t\t\t\tconst sf = ( ( ptNextShift_x - ptPrevShift_x ) * v_next_y -\n\t\t\t\t\t\t\t( ptNextShift_y - ptPrevShift_y ) * v_next_x ) /\n\t\t\t\t\t\t( v_prev_x * v_next_y - v_prev_y * v_next_x );\n\n\t\t\t\t\t// vector from inPt to intersection point\n\n\t\t\t\t\tv_trans_x = ( ptPrevShift_x + v_prev_x * sf - inPt.x );\n\t\t\t\t\tv_trans_y = ( ptPrevShift_y + v_prev_y * sf - inPt.y );\n\n\t\t\t\t\t// Don't normalize!, otherwise sharp corners become ugly\n\t\t\t\t\t//  but prevent crazy spikes\n\t\t\t\t\tconst v_trans_lensq = ( v_trans_x * v_trans_x + v_trans_y * v_trans_y );\n\t\t\t\t\tif ( v_trans_lensq <= 2 ) {\n\n\t\t\t\t\t\treturn new Vector2( v_trans_x, v_trans_y );\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\tshrink_by = Math.sqrt( v_trans_lensq / 2 );\n\n\t\t\t\t\t}\n\n\t\t\t\t} else {\n\n\t\t\t\t\t// handle special case of collinear edges\n\n\t\t\t\t\tlet direction_eq = false; // assumes: opposite\n\n\t\t\t\t\tif ( v_prev_x > Number.EPSILON ) {\n\n\t\t\t\t\t\tif ( v_next_x > Number.EPSILON ) {\n\n\t\t\t\t\t\t\tdirection_eq = true;\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\tif ( v_prev_x < - Number.EPSILON ) {\n\n\t\t\t\t\t\t\tif ( v_next_x < - Number.EPSILON ) {\n\n\t\t\t\t\t\t\t\tdirection_eq = true;\n\n\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t} else {\n\n\t\t\t\t\t\t\tif ( Math.sign( v_prev_y ) === Math.sign( v_next_y ) ) {\n\n\t\t\t\t\t\t\t\tdirection_eq = true;\n\n\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t\tif ( direction_eq ) {\n\n\t\t\t\t\t\t// console.log(\"Warning: lines are a straight sequence\");\n\t\t\t\t\t\tv_trans_x = - v_prev_y;\n\t\t\t\t\t\tv_trans_y = v_prev_x;\n\t\t\t\t\t\tshrink_by = Math.sqrt( v_prev_lensq );\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\t// console.log(\"Warning: lines are a straight spike\");\n\t\t\t\t\t\tv_trans_x = v_prev_x;\n\t\t\t\t\t\tv_trans_y = v_prev_y;\n\t\t\t\t\t\tshrink_by = Math.sqrt( v_prev_lensq / 2 );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\treturn new Vector2( v_trans_x / shrink_by, v_trans_y / shrink_by );\n\n\t\t\t}\n\n\n\t\t\tconst contourMovements = [];\n\n\t\t\tfor ( let i = 0, il = contour.length, j = il - 1, k = i + 1; i < il; i ++, j ++, k ++ ) {\n\n\t\t\t\tif ( j === il ) j = 0;\n\t\t\t\tif ( k === il ) k = 0;\n\n\t\t\t\t//  (j)---(i)---(k)\n\t\t\t\t// console.log('i,j,k', i, j , k)\n\n\t\t\t\tcontourMovements[ i ] = getBevelVec( contour[ i ], contour[ j ], contour[ k ] );\n\n\t\t\t}\n\n\t\t\tconst holesMovements = [];\n\t\t\tlet oneHoleMovements, verticesMovements = contourMovements.concat();\n\n\t\t\tfor ( let h = 0, hl = holes.length; h < hl; h ++ ) {\n\n\t\t\t\tconst ahole = holes[ h ];\n\n\t\t\t\toneHoleMovements = [];\n\n\t\t\t\tfor ( let i = 0, il = ahole.length, j = il - 1, k = i + 1; i < il; i ++, j ++, k ++ ) {\n\n\t\t\t\t\tif ( j === il ) j = 0;\n\t\t\t\t\tif ( k === il ) k = 0;\n\n\t\t\t\t\t//  (j)---(i)---(k)\n\t\t\t\t\toneHoleMovements[ i ] = getBevelVec( ahole[ i ], ahole[ j ], ahole[ k ] );\n\n\t\t\t\t}\n\n\t\t\t\tholesMovements.push( oneHoleMovements );\n\t\t\t\tverticesMovements = verticesMovements.concat( oneHoleMovements );\n\n\t\t\t}\n\n\n\t\t\t// Loop bevelSegments, 1 for the front, 1 for the back\n\n\t\t\tfor ( let b = 0; b < bevelSegments; b ++ ) {\n\n\t\t\t\t//for ( b = bevelSegments; b > 0; b -- ) {\n\n\t\t\t\tconst t = b / bevelSegments;\n\t\t\t\tconst z = bevelThickness * Math.cos( t * Math.PI / 2 );\n\t\t\t\tconst bs = bevelSize * Math.sin( t * Math.PI / 2 ) + bevelOffset;\n\n\t\t\t\t// contract shape\n\n\t\t\t\tfor ( let i = 0, il = contour.length; i < il; i ++ ) {\n\n\t\t\t\t\tconst vert = scalePt2( contour[ i ], contourMovements[ i ], bs );\n\n\t\t\t\t\tv( vert.x, vert.y, - z );\n\n\t\t\t\t}\n\n\t\t\t\t// expand holes\n\n\t\t\t\tfor ( let h = 0, hl = holes.length; h < hl; h ++ ) {\n\n\t\t\t\t\tconst ahole = holes[ h ];\n\t\t\t\t\toneHoleMovements = holesMovements[ h ];\n\n\t\t\t\t\tfor ( let i = 0, il = ahole.length; i < il; i ++ ) {\n\n\t\t\t\t\t\tconst vert = scalePt2( ahole[ i ], oneHoleMovements[ i ], bs );\n\n\t\t\t\t\t\tv( vert.x, vert.y, - z );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tconst bs = bevelSize + bevelOffset;\n\n\t\t\t// Back facing vertices\n\n\t\t\tfor ( let i = 0; i < vlen; i ++ ) {\n\n\t\t\t\tconst vert = bevelEnabled ? scalePt2( vertices[ i ], verticesMovements[ i ], bs ) : vertices[ i ];\n\n\t\t\t\tif ( ! extrudeByPath ) {\n\n\t\t\t\t\tv( vert.x, vert.y, 0 );\n\n\t\t\t\t} else {\n\n\t\t\t\t\t// v( vert.x, vert.y + extrudePts[ 0 ].y, extrudePts[ 0 ].x );\n\n\t\t\t\t\tnormal.copy( splineTube.normals[ 0 ] ).multiplyScalar( vert.x );\n\t\t\t\t\tbinormal.copy( splineTube.binormals[ 0 ] ).multiplyScalar( vert.y );\n\n\t\t\t\t\tposition2.copy( extrudePts[ 0 ] ).add( normal ).add( binormal );\n\n\t\t\t\t\tv( position2.x, position2.y, position2.z );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\t// Add stepped vertices...\n\t\t\t// Including front facing vertices\n\n\t\t\tfor ( let s = 1; s <= steps; s ++ ) {\n\n\t\t\t\tfor ( let i = 0; i < vlen; i ++ ) {\n\n\t\t\t\t\tconst vert = bevelEnabled ? scalePt2( vertices[ i ], verticesMovements[ i ], bs ) : vertices[ i ];\n\n\t\t\t\t\tif ( ! extrudeByPath ) {\n\n\t\t\t\t\t\tv( vert.x, vert.y, depth / steps * s );\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\t// v( vert.x, vert.y + extrudePts[ s - 1 ].y, extrudePts[ s - 1 ].x );\n\n\t\t\t\t\t\tnormal.copy( splineTube.normals[ s ] ).multiplyScalar( vert.x );\n\t\t\t\t\t\tbinormal.copy( splineTube.binormals[ s ] ).multiplyScalar( vert.y );\n\n\t\t\t\t\t\tposition2.copy( extrudePts[ s ] ).add( normal ).add( binormal );\n\n\t\t\t\t\t\tv( position2.x, position2.y, position2.z );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\n\t\t\t// Add bevel segments planes\n\n\t\t\t//for ( b = 1; b <= bevelSegments; b ++ ) {\n\t\t\tfor ( let b = bevelSegments - 1; b >= 0; b -- ) {\n\n\t\t\t\tconst t = b / bevelSegments;\n\t\t\t\tconst z = bevelThickness * Math.cos( t * Math.PI / 2 );\n\t\t\t\tconst bs = bevelSize * Math.sin( t * Math.PI / 2 ) + bevelOffset;\n\n\t\t\t\t// contract shape\n\n\t\t\t\tfor ( let i = 0, il = contour.length; i < il; i ++ ) {\n\n\t\t\t\t\tconst vert = scalePt2( contour[ i ], contourMovements[ i ], bs );\n\t\t\t\t\tv( vert.x, vert.y, depth + z );\n\n\t\t\t\t}\n\n\t\t\t\t// expand holes\n\n\t\t\t\tfor ( let h = 0, hl = holes.length; h < hl; h ++ ) {\n\n\t\t\t\t\tconst ahole = holes[ h ];\n\t\t\t\t\toneHoleMovements = holesMovements[ h ];\n\n\t\t\t\t\tfor ( let i = 0, il = ahole.length; i < il; i ++ ) {\n\n\t\t\t\t\t\tconst vert = scalePt2( ahole[ i ], oneHoleMovements[ i ], bs );\n\n\t\t\t\t\t\tif ( ! extrudeByPath ) {\n\n\t\t\t\t\t\t\tv( vert.x, vert.y, depth + z );\n\n\t\t\t\t\t\t} else {\n\n\t\t\t\t\t\t\tv( vert.x, vert.y + extrudePts[ steps - 1 ].y, extrudePts[ steps - 1 ].x + z );\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\t/* Faces */\n\n\t\t\t// Top and bottom faces\n\n\t\t\tbuildLidFaces();\n\n\t\t\t// Sides faces\n\n\t\t\tbuildSideFaces();\n\n\n\t\t\t/////  Internal functions\n\n\t\t\tfunction buildLidFaces() {\n\n\t\t\t\tconst start = verticesArray.length / 3;\n\n\t\t\t\tif ( bevelEnabled ) {\n\n\t\t\t\t\tlet layer = 0; // steps + 1\n\t\t\t\t\tlet offset = vlen * layer;\n\n\t\t\t\t\t// Bottom faces\n\n\t\t\t\t\tfor ( let i = 0; i < flen; i ++ ) {\n\n\t\t\t\t\t\tconst face = faces[ i ];\n\t\t\t\t\t\tf3( face[ 2 ] + offset, face[ 1 ] + offset, face[ 0 ] + offset );\n\n\t\t\t\t\t}\n\n\t\t\t\t\tlayer = steps + bevelSegments * 2;\n\t\t\t\t\toffset = vlen * layer;\n\n\t\t\t\t\t// Top faces\n\n\t\t\t\t\tfor ( let i = 0; i < flen; i ++ ) {\n\n\t\t\t\t\t\tconst face = faces[ i ];\n\t\t\t\t\t\tf3( face[ 0 ] + offset, face[ 1 ] + offset, face[ 2 ] + offset );\n\n\t\t\t\t\t}\n\n\t\t\t\t} else {\n\n\t\t\t\t\t// Bottom faces\n\n\t\t\t\t\tfor ( let i = 0; i < flen; i ++ ) {\n\n\t\t\t\t\t\tconst face = faces[ i ];\n\t\t\t\t\t\tf3( face[ 2 ], face[ 1 ], face[ 0 ] );\n\n\t\t\t\t\t}\n\n\t\t\t\t\t// Top faces\n\n\t\t\t\t\tfor ( let i = 0; i < flen; i ++ ) {\n\n\t\t\t\t\t\tconst face = faces[ i ];\n\t\t\t\t\t\tf3( face[ 0 ] + vlen * steps, face[ 1 ] + vlen * steps, face[ 2 ] + vlen * steps );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\tscope.addGroup( start, verticesArray.length / 3 - start, 0 );\n\n\t\t\t}\n\n\t\t\t// Create faces for the z-sides of the shape\n\n\t\t\tfunction buildSideFaces() {\n\n\t\t\t\tconst start = verticesArray.length / 3;\n\t\t\t\tlet layeroffset = 0;\n\t\t\t\tsidewalls( contour, layeroffset );\n\t\t\t\tlayeroffset += contour.length;\n\n\t\t\t\tfor ( let h = 0, hl = holes.length; h < hl; h ++ ) {\n\n\t\t\t\t\tconst ahole = holes[ h ];\n\t\t\t\t\tsidewalls( ahole, layeroffset );\n\n\t\t\t\t\t//, true\n\t\t\t\t\tlayeroffset += ahole.length;\n\n\t\t\t\t}\n\n\n\t\t\t\tscope.addGroup( start, verticesArray.length / 3 - start, 1 );\n\n\n\t\t\t}\n\n\t\t\tfunction sidewalls( contour, layeroffset ) {\n\n\t\t\t\tlet i = contour.length;\n\n\t\t\t\twhile ( -- i >= 0 ) {\n\n\t\t\t\t\tconst j = i;\n\t\t\t\t\tlet k = i - 1;\n\t\t\t\t\tif ( k < 0 ) k = contour.length - 1;\n\n\t\t\t\t\t//console.log('b', i,j, i-1, k,vertices.length);\n\n\t\t\t\t\tfor ( let s = 0, sl = ( steps + bevelSegments * 2 ); s < sl; s ++ ) {\n\n\t\t\t\t\t\tconst slen1 = vlen * s;\n\t\t\t\t\t\tconst slen2 = vlen * ( s + 1 );\n\n\t\t\t\t\t\tconst a = layeroffset + j + slen1,\n\t\t\t\t\t\t\tb = layeroffset + k + slen1,\n\t\t\t\t\t\t\tc = layeroffset + k + slen2,\n\t\t\t\t\t\t\td = layeroffset + j + slen2;\n\n\t\t\t\t\t\tf4( a, b, c, d );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tfunction v( x, y, z ) {\n\n\t\t\t\tplaceholder.push( x );\n\t\t\t\tplaceholder.push( y );\n\t\t\t\tplaceholder.push( z );\n\n\t\t\t}\n\n\n\t\t\tfunction f3( a, b, c ) {\n\n\t\t\t\taddVertex( a );\n\t\t\t\taddVertex( b );\n\t\t\t\taddVertex( c );\n\n\t\t\t\tconst nextIndex = verticesArray.length / 3;\n\t\t\t\tconst uvs = uvgen.generateTopUV( scope, verticesArray, nextIndex - 3, nextIndex - 2, nextIndex - 1 );\n\n\t\t\t\taddUV( uvs[ 0 ] );\n\t\t\t\taddUV( uvs[ 1 ] );\n\t\t\t\taddUV( uvs[ 2 ] );\n\n\t\t\t}\n\n\t\t\tfunction f4( a, b, c, d ) {\n\n\t\t\t\taddVertex( a );\n\t\t\t\taddVertex( b );\n\t\t\t\taddVertex( d );\n\n\t\t\t\taddVertex( b );\n\t\t\t\taddVertex( c );\n\t\t\t\taddVertex( d );\n\n\n\t\t\t\tconst nextIndex = verticesArray.length / 3;\n\t\t\t\tconst uvs = uvgen.generateSideWallUV( scope, verticesArray, nextIndex - 6, nextIndex - 3, nextIndex - 2, nextIndex - 1 );\n\n\t\t\t\taddUV( uvs[ 0 ] );\n\t\t\t\taddUV( uvs[ 1 ] );\n\t\t\t\taddUV( uvs[ 3 ] );\n\n\t\t\t\taddUV( uvs[ 1 ] );\n\t\t\t\taddUV( uvs[ 2 ] );\n\t\t\t\taddUV( uvs[ 3 ] );\n\n\t\t\t}\n\n\t\t\tfunction addVertex( index ) {\n\n\t\t\t\tverticesArray.push( placeholder[ index * 3 + 0 ] );\n\t\t\t\tverticesArray.push( placeholder[ index * 3 + 1 ] );\n\t\t\t\tverticesArray.push( placeholder[ index * 3 + 2 ] );\n\n\t\t\t}\n\n\n\t\t\tfunction addUV( vector2 ) {\n\n\t\t\t\tuvArray.push( vector2.x );\n\t\t\t\tuvArray.push( vector2.y );\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\ttoJSON() {\n\n\t\tconst data = BufferGeometry.prototype.toJSON.call( this );\n\n\t\tconst shapes = this.parameters.shapes;\n\t\tconst options = this.parameters.options;\n\n\t\treturn toJSON( shapes, options, data );\n\n\t}\n\n}\n\nconst WorldUVGenerator = {\n\n\tgenerateTopUV: function ( geometry, vertices, indexA, indexB, indexC ) {\n\n\t\tconst a_x = vertices[ indexA * 3 ];\n\t\tconst a_y = vertices[ indexA * 3 + 1 ];\n\t\tconst b_x = vertices[ indexB * 3 ];\n\t\tconst b_y = vertices[ indexB * 3 + 1 ];\n\t\tconst c_x = vertices[ indexC * 3 ];\n\t\tconst c_y = vertices[ indexC * 3 + 1 ];\n\n\t\treturn [\n\t\t\tnew Vector2( a_x, a_y ),\n\t\t\tnew Vector2( b_x, b_y ),\n\t\t\tnew Vector2( c_x, c_y )\n\t\t];\n\n\t},\n\n\tgenerateSideWallUV: function ( geometry, vertices, indexA, indexB, indexC, indexD ) {\n\n\t\tconst a_x = vertices[ indexA * 3 ];\n\t\tconst a_y = vertices[ indexA * 3 + 1 ];\n\t\tconst a_z = vertices[ indexA * 3 + 2 ];\n\t\tconst b_x = vertices[ indexB * 3 ];\n\t\tconst b_y = vertices[ indexB * 3 + 1 ];\n\t\tconst b_z = vertices[ indexB * 3 + 2 ];\n\t\tconst c_x = vertices[ indexC * 3 ];\n\t\tconst c_y = vertices[ indexC * 3 + 1 ];\n\t\tconst c_z = vertices[ indexC * 3 + 2 ];\n\t\tconst d_x = vertices[ indexD * 3 ];\n\t\tconst d_y = vertices[ indexD * 3 + 1 ];\n\t\tconst d_z = vertices[ indexD * 3 + 2 ];\n\n\t\tif ( Math.abs( a_y - b_y ) < 0.01 ) {\n\n\t\t\treturn [\n\t\t\t\tnew Vector2( a_x, 1 - a_z ),\n\t\t\t\tnew Vector2( b_x, 1 - b_z ),\n\t\t\t\tnew Vector2( c_x, 1 - c_z ),\n\t\t\t\tnew Vector2( d_x, 1 - d_z )\n\t\t\t];\n\n\t\t} else {\n\n\t\t\treturn [\n\t\t\t\tnew Vector2( a_y, 1 - a_z ),\n\t\t\t\tnew Vector2( b_y, 1 - b_z ),\n\t\t\t\tnew Vector2( c_y, 1 - c_z ),\n\t\t\t\tnew Vector2( d_y, 1 - d_z )\n\t\t\t];\n\n\t\t}\n\n\t}\n\n};\n\nfunction toJSON( shapes, options, data ) {\n\n\tdata.shapes = [];\n\n\tif ( Array.isArray( shapes ) ) {\n\n\t\tfor ( let i = 0, l = shapes.length; i < l; i ++ ) {\n\n\t\t\tconst shape = shapes[ i ];\n\n\t\t\tdata.shapes.push( shape.uuid );\n\n\t\t}\n\n\t} else {\n\n\t\tdata.shapes.push( shapes.uuid );\n\n\t}\n\n\tif ( options.extrudePath !== undefined ) data.options.extrudePath = options.extrudePath.toJSON();\n\n\treturn data;\n\n}\n\nclass IcosahedronGeometry extends PolyhedronGeometry {\n\n\tconstructor( radius = 1, detail = 0 ) {\n\n\t\tconst t = ( 1 + Math.sqrt( 5 ) ) / 2;\n\n\t\tconst vertices = [\n\t\t\t- 1, t, 0, \t1, t, 0, \t- 1, - t, 0, \t1, - t, 0,\n\t\t\t0, - 1, t, \t0, 1, t,\t0, - 1, - t, \t0, 1, - t,\n\t\t\tt, 0, - 1, \tt, 0, 1, \t- t, 0, - 1, \t- t, 0, 1\n\t\t];\n\n\t\tconst indices = [\n\t\t\t0, 11, 5, \t0, 5, 1, \t0, 1, 7, \t0, 7, 10, \t0, 10, 11,\n\t\t\t1, 5, 9, \t5, 11, 4,\t11, 10, 2,\t10, 7, 6,\t7, 1, 8,\n\t\t\t3, 9, 4, \t3, 4, 2,\t3, 2, 6,\t3, 6, 8,\t3, 8, 9,\n\t\t\t4, 9, 5, \t2, 4, 11,\t6, 2, 10,\t8, 6, 7,\t9, 8, 1\n\t\t];\n\n\t\tsuper( vertices, indices, radius, detail );\n\n\t\tthis.type = 'IcosahedronGeometry';\n\n\t\tthis.parameters = {\n\t\t\tradius: radius,\n\t\t\tdetail: detail\n\t\t};\n\n\t}\n\n}\n\nclass LatheGeometry extends BufferGeometry {\n\n\tconstructor( points, segments = 12, phiStart = 0, phiLength = Math.PI * 2 ) {\n\n\t\tsuper();\n\n\t\tthis.type = 'LatheGeometry';\n\n\t\tthis.parameters = {\n\t\t\tpoints: points,\n\t\t\tsegments: segments,\n\t\t\tphiStart: phiStart,\n\t\t\tphiLength: phiLength\n\t\t};\n\n\t\tsegments = Math.floor( segments );\n\n\t\t// clamp phiLength so it's in range of [ 0, 2PI ]\n\n\t\tphiLength = MathUtils.clamp( phiLength, 0, Math.PI * 2 );\n\n\t\t// buffers\n\n\t\tconst indices = [];\n\t\tconst vertices = [];\n\t\tconst uvs = [];\n\n\t\t// helper variables\n\n\t\tconst inverseSegments = 1.0 / segments;\n\t\tconst vertex = new Vector3();\n\t\tconst uv = new Vector2();\n\n\t\t// generate vertices and uvs\n\n\t\tfor ( let i = 0; i <= segments; i ++ ) {\n\n\t\t\tconst phi = phiStart + i * inverseSegments * phiLength;\n\n\t\t\tconst sin = Math.sin( phi );\n\t\t\tconst cos = Math.cos( phi );\n\n\t\t\tfor ( let j = 0; j <= ( points.length - 1 ); j ++ ) {\n\n\t\t\t\t// vertex\n\n\t\t\t\tvertex.x = points[ j ].x * sin;\n\t\t\t\tvertex.y = points[ j ].y;\n\t\t\t\tvertex.z = points[ j ].x * cos;\n\n\t\t\t\tvertices.push( vertex.x, vertex.y, vertex.z );\n\n\t\t\t\t// uv\n\n\t\t\t\tuv.x = i / segments;\n\t\t\t\tuv.y = j / ( points.length - 1 );\n\n\t\t\t\tuvs.push( uv.x, uv.y );\n\n\n\t\t\t}\n\n\t\t}\n\n\t\t// indices\n\n\t\tfor ( let i = 0; i < segments; i ++ ) {\n\n\t\t\tfor ( let j = 0; j < ( points.length - 1 ); j ++ ) {\n\n\t\t\t\tconst base = j + i * points.length;\n\n\t\t\t\tconst a = base;\n\t\t\t\tconst b = base + points.length;\n\t\t\t\tconst c = base + points.length + 1;\n\t\t\t\tconst d = base + 1;\n\n\t\t\t\t// faces\n\n\t\t\t\tindices.push( a, b, d );\n\t\t\t\tindices.push( b, c, d );\n\n\t\t\t}\n\n\t\t}\n\n\t\t// build geometry\n\n\t\tthis.setIndex( indices );\n\t\tthis.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\t\tthis.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );\n\n\t\t// generate normals\n\n\t\tthis.computeVertexNormals();\n\n\t\t// if the geometry is closed, we need to average the normals along the seam.\n\t\t// because the corresponding vertices are identical (but still have different UVs).\n\n\t\tif ( phiLength === Math.PI * 2 ) {\n\n\t\t\tconst normals = this.attributes.normal.array;\n\t\t\tconst n1 = new Vector3();\n\t\t\tconst n2 = new Vector3();\n\t\t\tconst n = new Vector3();\n\n\t\t\t// this is the buffer offset for the last line of vertices\n\n\t\t\tconst base = segments * points.length * 3;\n\n\t\t\tfor ( let i = 0, j = 0; i < points.length; i ++, j += 3 ) {\n\n\t\t\t\t// select the normal of the vertex in the first line\n\n\t\t\t\tn1.x = normals[ j + 0 ];\n\t\t\t\tn1.y = normals[ j + 1 ];\n\t\t\t\tn1.z = normals[ j + 2 ];\n\n\t\t\t\t// select the normal of the vertex in the last line\n\n\t\t\t\tn2.x = normals[ base + j + 0 ];\n\t\t\t\tn2.y = normals[ base + j + 1 ];\n\t\t\t\tn2.z = normals[ base + j + 2 ];\n\n\t\t\t\t// average normals\n\n\t\t\t\tn.addVectors( n1, n2 ).normalize();\n\n\t\t\t\t// assign the new values to both normals\n\n\t\t\t\tnormals[ j + 0 ] = normals[ base + j + 0 ] = n.x;\n\t\t\t\tnormals[ j + 1 ] = normals[ base + j + 1 ] = n.y;\n\t\t\t\tnormals[ j + 2 ] = normals[ base + j + 2 ] = n.z;\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n}\n\nclass OctahedronGeometry extends PolyhedronGeometry {\n\n\tconstructor( radius = 1, detail = 0 ) {\n\n\t\tconst vertices = [\n\t\t\t1, 0, 0, \t- 1, 0, 0,\t0, 1, 0,\n\t\t\t0, - 1, 0, \t0, 0, 1,\t0, 0, - 1\n\t\t];\n\n\t\tconst indices = [\n\t\t\t0, 2, 4,\t0, 4, 3,\t0, 3, 5,\n\t\t\t0, 5, 2,\t1, 2, 5,\t1, 5, 3,\n\t\t\t1, 3, 4,\t1, 4, 2\n\t\t];\n\n\t\tsuper( vertices, indices, radius, detail );\n\n\t\tthis.type = 'OctahedronGeometry';\n\n\t\tthis.parameters = {\n\t\t\tradius: radius,\n\t\t\tdetail: detail\n\t\t};\n\n\t}\n\n}\n\n/**\n * Parametric Surfaces Geometry\n * based on the brilliant article by @prideout https://prideout.net/blog/old/blog/index.html@p=44.html\n */\n\nfunction ParametricGeometry( func, slices, stacks ) {\n\n\tBufferGeometry.call( this );\n\n\tthis.type = 'ParametricGeometry';\n\n\tthis.parameters = {\n\t\tfunc: func,\n\t\tslices: slices,\n\t\tstacks: stacks\n\t};\n\n\t// buffers\n\n\tconst indices = [];\n\tconst vertices = [];\n\tconst normals = [];\n\tconst uvs = [];\n\n\tconst EPS = 0.00001;\n\n\tconst normal = new Vector3();\n\n\tconst p0 = new Vector3(), p1 = new Vector3();\n\tconst pu = new Vector3(), pv = new Vector3();\n\n\tif ( func.length < 3 ) {\n\n\t\tconsole.error( 'THREE.ParametricGeometry: Function must now modify a Vector3 as third parameter.' );\n\n\t}\n\n\t// generate vertices, normals and uvs\n\n\tconst sliceCount = slices + 1;\n\n\tfor ( let i = 0; i <= stacks; i ++ ) {\n\n\t\tconst v = i / stacks;\n\n\t\tfor ( let j = 0; j <= slices; j ++ ) {\n\n\t\t\tconst u = j / slices;\n\n\t\t\t// vertex\n\n\t\t\tfunc( u, v, p0 );\n\t\t\tvertices.push( p0.x, p0.y, p0.z );\n\n\t\t\t// normal\n\n\t\t\t// approximate tangent vectors via finite differences\n\n\t\t\tif ( u - EPS >= 0 ) {\n\n\t\t\t\tfunc( u - EPS, v, p1 );\n\t\t\t\tpu.subVectors( p0, p1 );\n\n\t\t\t} else {\n\n\t\t\t\tfunc( u + EPS, v, p1 );\n\t\t\t\tpu.subVectors( p1, p0 );\n\n\t\t\t}\n\n\t\t\tif ( v - EPS >= 0 ) {\n\n\t\t\t\tfunc( u, v - EPS, p1 );\n\t\t\t\tpv.subVectors( p0, p1 );\n\n\t\t\t} else {\n\n\t\t\t\tfunc( u, v + EPS, p1 );\n\t\t\t\tpv.subVectors( p1, p0 );\n\n\t\t\t}\n\n\t\t\t// cross product of tangent vectors returns surface normal\n\n\t\t\tnormal.crossVectors( pu, pv ).normalize();\n\t\t\tnormals.push( normal.x, normal.y, normal.z );\n\n\t\t\t// uv\n\n\t\t\tuvs.push( u, v );\n\n\t\t}\n\n\t}\n\n\t// generate indices\n\n\tfor ( let i = 0; i < stacks; i ++ ) {\n\n\t\tfor ( let j = 0; j < slices; j ++ ) {\n\n\t\t\tconst a = i * sliceCount + j;\n\t\t\tconst b = i * sliceCount + j + 1;\n\t\t\tconst c = ( i + 1 ) * sliceCount + j + 1;\n\t\t\tconst d = ( i + 1 ) * sliceCount + j;\n\n\t\t\t// faces one and two\n\n\t\t\tindices.push( a, b, d );\n\t\t\tindices.push( b, c, d );\n\n\t\t}\n\n\t}\n\n\t// build geometry\n\n\tthis.setIndex( indices );\n\tthis.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\tthis.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );\n\tthis.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );\n\n}\n\nParametricGeometry.prototype = Object.create( BufferGeometry.prototype );\nParametricGeometry.prototype.constructor = ParametricGeometry;\n\nclass RingGeometry extends BufferGeometry {\n\n\tconstructor( innerRadius = 0.5, outerRadius = 1, thetaSegments = 8, phiSegments = 1, thetaStart = 0, thetaLength = Math.PI * 2 ) {\n\n\t\tsuper();\n\n\t\tthis.type = 'RingGeometry';\n\n\t\tthis.parameters = {\n\t\t\tinnerRadius: innerRadius,\n\t\t\touterRadius: outerRadius,\n\t\t\tthetaSegments: thetaSegments,\n\t\t\tphiSegments: phiSegments,\n\t\t\tthetaStart: thetaStart,\n\t\t\tthetaLength: thetaLength\n\t\t};\n\n\t\tthetaSegments = Math.max( 3, thetaSegments );\n\t\tphiSegments = Math.max( 1, phiSegments );\n\n\t\t// buffers\n\n\t\tconst indices = [];\n\t\tconst vertices = [];\n\t\tconst normals = [];\n\t\tconst uvs = [];\n\n\t\t// some helper variables\n\n\t\tlet radius = innerRadius;\n\t\tconst radiusStep = ( ( outerRadius - innerRadius ) / phiSegments );\n\t\tconst vertex = new Vector3();\n\t\tconst uv = new Vector2();\n\n\t\t// generate vertices, normals and uvs\n\n\t\tfor ( let j = 0; j <= phiSegments; j ++ ) {\n\n\t\t\tfor ( let i = 0; i <= thetaSegments; i ++ ) {\n\n\t\t\t\t// values are generate from the inside of the ring to the outside\n\n\t\t\t\tconst segment = thetaStart + i / thetaSegments * thetaLength;\n\n\t\t\t\t// vertex\n\n\t\t\t\tvertex.x = radius * Math.cos( segment );\n\t\t\t\tvertex.y = radius * Math.sin( segment );\n\n\t\t\t\tvertices.push( vertex.x, vertex.y, vertex.z );\n\n\t\t\t\t// normal\n\n\t\t\t\tnormals.push( 0, 0, 1 );\n\n\t\t\t\t// uv\n\n\t\t\t\tuv.x = ( vertex.x / outerRadius + 1 ) / 2;\n\t\t\t\tuv.y = ( vertex.y / outerRadius + 1 ) / 2;\n\n\t\t\t\tuvs.push( uv.x, uv.y );\n\n\t\t\t}\n\n\t\t\t// increase the radius for next row of vertices\n\n\t\t\tradius += radiusStep;\n\n\t\t}\n\n\t\t// indices\n\n\t\tfor ( let j = 0; j < phiSegments; j ++ ) {\n\n\t\t\tconst thetaSegmentLevel = j * ( thetaSegments + 1 );\n\n\t\t\tfor ( let i = 0; i < thetaSegments; i ++ ) {\n\n\t\t\t\tconst segment = i + thetaSegmentLevel;\n\n\t\t\t\tconst a = segment;\n\t\t\t\tconst b = segment + thetaSegments + 1;\n\t\t\t\tconst c = segment + thetaSegments + 2;\n\t\t\t\tconst d = segment + 1;\n\n\t\t\t\t// faces\n\n\t\t\t\tindices.push( a, b, d );\n\t\t\t\tindices.push( b, c, d );\n\n\t\t\t}\n\n\t\t}\n\n\t\t// build geometry\n\n\t\tthis.setIndex( indices );\n\t\tthis.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\t\tthis.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );\n\t\tthis.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );\n\n\t}\n\n}\n\nclass ShapeGeometry extends BufferGeometry {\n\n\tconstructor( shapes, curveSegments = 12 ) {\n\n\t\tsuper();\n\t\tthis.type = 'ShapeGeometry';\n\n\t\tthis.parameters = {\n\t\t\tshapes: shapes,\n\t\t\tcurveSegments: curveSegments\n\t\t};\n\n\t\t// buffers\n\n\t\tconst indices = [];\n\t\tconst vertices = [];\n\t\tconst normals = [];\n\t\tconst uvs = [];\n\n\t\t// helper variables\n\n\t\tlet groupStart = 0;\n\t\tlet groupCount = 0;\n\n\t\t// allow single and array values for \"shapes\" parameter\n\n\t\tif ( Array.isArray( shapes ) === false ) {\n\n\t\t\taddShape( shapes );\n\n\t\t} else {\n\n\t\t\tfor ( let i = 0; i < shapes.length; i ++ ) {\n\n\t\t\t\taddShape( shapes[ i ] );\n\n\t\t\t\tthis.addGroup( groupStart, groupCount, i ); // enables MultiMaterial support\n\n\t\t\t\tgroupStart += groupCount;\n\t\t\t\tgroupCount = 0;\n\n\t\t\t}\n\n\t\t}\n\n\t\t// build geometry\n\n\t\tthis.setIndex( indices );\n\t\tthis.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\t\tthis.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );\n\t\tthis.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );\n\n\n\t\t// helper functions\n\n\t\tfunction addShape( shape ) {\n\n\t\t\tconst indexOffset = vertices.length / 3;\n\t\t\tconst points = shape.extractPoints( curveSegments );\n\n\t\t\tlet shapeVertices = points.shape;\n\t\t\tconst shapeHoles = points.holes;\n\n\t\t\t// check direction of vertices\n\n\t\t\tif ( ShapeUtils.isClockWise( shapeVertices ) === false ) {\n\n\t\t\t\tshapeVertices = shapeVertices.reverse();\n\n\t\t\t}\n\n\t\t\tfor ( let i = 0, l = shapeHoles.length; i < l; i ++ ) {\n\n\t\t\t\tconst shapeHole = shapeHoles[ i ];\n\n\t\t\t\tif ( ShapeUtils.isClockWise( shapeHole ) === true ) {\n\n\t\t\t\t\tshapeHoles[ i ] = shapeHole.reverse();\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tconst faces = ShapeUtils.triangulateShape( shapeVertices, shapeHoles );\n\n\t\t\t// join vertices of inner and outer paths to a single array\n\n\t\t\tfor ( let i = 0, l = shapeHoles.length; i < l; i ++ ) {\n\n\t\t\t\tconst shapeHole = shapeHoles[ i ];\n\t\t\t\tshapeVertices = shapeVertices.concat( shapeHole );\n\n\t\t\t}\n\n\t\t\t// vertices, normals, uvs\n\n\t\t\tfor ( let i = 0, l = shapeVertices.length; i < l; i ++ ) {\n\n\t\t\t\tconst vertex = shapeVertices[ i ];\n\n\t\t\t\tvertices.push( vertex.x, vertex.y, 0 );\n\t\t\t\tnormals.push( 0, 0, 1 );\n\t\t\t\tuvs.push( vertex.x, vertex.y ); // world uvs\n\n\t\t\t}\n\n\t\t\t// incides\n\n\t\t\tfor ( let i = 0, l = faces.length; i < l; i ++ ) {\n\n\t\t\t\tconst face = faces[ i ];\n\n\t\t\t\tconst a = face[ 0 ] + indexOffset;\n\t\t\t\tconst b = face[ 1 ] + indexOffset;\n\t\t\t\tconst c = face[ 2 ] + indexOffset;\n\n\t\t\t\tindices.push( a, b, c );\n\t\t\t\tgroupCount += 3;\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\ttoJSON() {\n\n\t\tconst data = BufferGeometry.prototype.toJSON.call( this );\n\n\t\tconst shapes = this.parameters.shapes;\n\n\t\treturn toJSON$1( shapes, data );\n\n\t}\n\n}\n\nfunction toJSON$1( shapes, data ) {\n\n\tdata.shapes = [];\n\n\tif ( Array.isArray( shapes ) ) {\n\n\t\tfor ( let i = 0, l = shapes.length; i < l; i ++ ) {\n\n\t\t\tconst shape = shapes[ i ];\n\n\t\t\tdata.shapes.push( shape.uuid );\n\n\t\t}\n\n\t} else {\n\n\t\tdata.shapes.push( shapes.uuid );\n\n\t}\n\n\treturn data;\n\n}\n\nclass SphereGeometry extends BufferGeometry {\n\n\tconstructor( radius = 1, widthSegments = 8, heightSegments = 6, phiStart = 0, phiLength = Math.PI * 2, thetaStart = 0, thetaLength = Math.PI ) {\n\n\t\tsuper();\n\t\tthis.type = 'SphereGeometry';\n\n\t\tthis.parameters = {\n\t\t\tradius: radius,\n\t\t\twidthSegments: widthSegments,\n\t\t\theightSegments: heightSegments,\n\t\t\tphiStart: phiStart,\n\t\t\tphiLength: phiLength,\n\t\t\tthetaStart: thetaStart,\n\t\t\tthetaLength: thetaLength\n\t\t};\n\n\t\twidthSegments = Math.max( 3, Math.floor( widthSegments ) );\n\t\theightSegments = Math.max( 2, Math.floor( heightSegments ) );\n\n\t\tconst thetaEnd = Math.min( thetaStart + thetaLength, Math.PI );\n\n\t\tlet index = 0;\n\t\tconst grid = [];\n\n\t\tconst vertex = new Vector3();\n\t\tconst normal = new Vector3();\n\n\t\t// buffers\n\n\t\tconst indices = [];\n\t\tconst vertices = [];\n\t\tconst normals = [];\n\t\tconst uvs = [];\n\n\t\t// generate vertices, normals and uvs\n\n\t\tfor ( let iy = 0; iy <= heightSegments; iy ++ ) {\n\n\t\t\tconst verticesRow = [];\n\n\t\t\tconst v = iy / heightSegments;\n\n\t\t\t// special case for the poles\n\n\t\t\tlet uOffset = 0;\n\n\t\t\tif ( iy == 0 && thetaStart == 0 ) {\n\n\t\t\t\tuOffset = 0.5 / widthSegments;\n\n\t\t\t} else if ( iy == heightSegments && thetaEnd == Math.PI ) {\n\n\t\t\t\tuOffset = - 0.5 / widthSegments;\n\n\t\t\t}\n\n\t\t\tfor ( let ix = 0; ix <= widthSegments; ix ++ ) {\n\n\t\t\t\tconst u = ix / widthSegments;\n\n\t\t\t\t// vertex\n\n\t\t\t\tvertex.x = - radius * Math.cos( phiStart + u * phiLength ) * Math.sin( thetaStart + v * thetaLength );\n\t\t\t\tvertex.y = radius * Math.cos( thetaStart + v * thetaLength );\n\t\t\t\tvertex.z = radius * Math.sin( phiStart + u * phiLength ) * Math.sin( thetaStart + v * thetaLength );\n\n\t\t\t\tvertices.push( vertex.x, vertex.y, vertex.z );\n\n\t\t\t\t// normal\n\n\t\t\t\tnormal.copy( vertex ).normalize();\n\t\t\t\tnormals.push( normal.x, normal.y, normal.z );\n\n\t\t\t\t// uv\n\n\t\t\t\tuvs.push( u + uOffset, 1 - v );\n\n\t\t\t\tverticesRow.push( index ++ );\n\n\t\t\t}\n\n\t\t\tgrid.push( verticesRow );\n\n\t\t}\n\n\t\t// indices\n\n\t\tfor ( let iy = 0; iy < heightSegments; iy ++ ) {\n\n\t\t\tfor ( let ix = 0; ix < widthSegments; ix ++ ) {\n\n\t\t\t\tconst a = grid[ iy ][ ix + 1 ];\n\t\t\t\tconst b = grid[ iy ][ ix ];\n\t\t\t\tconst c = grid[ iy + 1 ][ ix ];\n\t\t\t\tconst d = grid[ iy + 1 ][ ix + 1 ];\n\n\t\t\t\tif ( iy !== 0 || thetaStart > 0 ) indices.push( a, b, d );\n\t\t\t\tif ( iy !== heightSegments - 1 || thetaEnd < Math.PI ) indices.push( b, c, d );\n\n\t\t\t}\n\n\t\t}\n\n\t\t// build geometry\n\n\t\tthis.setIndex( indices );\n\t\tthis.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\t\tthis.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );\n\t\tthis.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );\n\n\t}\n\n}\n\nclass TetrahedronGeometry extends PolyhedronGeometry {\n\n\tconstructor( radius = 1, detail = 0 ) {\n\n\t\tconst vertices = [\n\t\t\t1, 1, 1, \t- 1, - 1, 1, \t- 1, 1, - 1, \t1, - 1, - 1\n\t\t];\n\n\t\tconst indices = [\n\t\t\t2, 1, 0, \t0, 3, 2,\t1, 3, 0,\t2, 3, 1\n\t\t];\n\n\t\tsuper( vertices, indices, radius, detail );\n\n\t\tthis.type = 'TetrahedronGeometry';\n\n\t\tthis.parameters = {\n\t\t\tradius: radius,\n\t\t\tdetail: detail\n\t\t};\n\n\t}\n\n}\n\n/**\n * Text = 3D Text\n *\n * parameters = {\n *  font: <THREE.Font>, // font\n *\n *  size: <float>, // size of the text\n *  height: <float>, // thickness to extrude text\n *  curveSegments: <int>, // number of points on the curves\n *\n *  bevelEnabled: <bool>, // turn on bevel\n *  bevelThickness: <float>, // how deep into text bevel goes\n *  bevelSize: <float>, // how far from text outline (including bevelOffset) is bevel\n *  bevelOffset: <float> // how far from text outline does bevel start\n * }\n */\n\nclass TextGeometry extends ExtrudeGeometry {\n\n\tconstructor( text, parameters = {} ) {\n\n\t\tconst font = parameters.font;\n\n\t\tif ( ! ( font && font.isFont ) ) {\n\n\t\t\tconsole.error( 'THREE.TextGeometry: font parameter is not an instance of THREE.Font.' );\n\t\t\treturn new BufferGeometry();\n\n\t\t}\n\n\t\tconst shapes = font.generateShapes( text, parameters.size );\n\n\t\t// translate parameters to ExtrudeGeometry API\n\n\t\tparameters.depth = parameters.height !== undefined ? parameters.height : 50;\n\n\t\t// defaults\n\n\t\tif ( parameters.bevelThickness === undefined ) parameters.bevelThickness = 10;\n\t\tif ( parameters.bevelSize === undefined ) parameters.bevelSize = 8;\n\t\tif ( parameters.bevelEnabled === undefined ) parameters.bevelEnabled = false;\n\n\t\tsuper( shapes, parameters );\n\n\t\tthis.type = 'TextGeometry';\n\n\t}\n\n}\n\nclass TorusGeometry extends BufferGeometry {\n\n\tconstructor( radius = 1, tube = 0.4, radialSegments = 8, tubularSegments = 6, arc = Math.PI * 2 ) {\n\n\t\tsuper();\n\t\tthis.type = 'TorusGeometry';\n\n\t\tthis.parameters = {\n\t\t\tradius: radius,\n\t\t\ttube: tube,\n\t\t\tradialSegments: radialSegments,\n\t\t\ttubularSegments: tubularSegments,\n\t\t\tarc: arc\n\t\t};\n\n\t\tradialSegments = Math.floor( radialSegments );\n\t\ttubularSegments = Math.floor( tubularSegments );\n\n\t\t// buffers\n\n\t\tconst indices = [];\n\t\tconst vertices = [];\n\t\tconst normals = [];\n\t\tconst uvs = [];\n\n\t\t// helper variables\n\n\t\tconst center = new Vector3();\n\t\tconst vertex = new Vector3();\n\t\tconst normal = new Vector3();\n\n\t\t// generate vertices, normals and uvs\n\n\t\tfor ( let j = 0; j <= radialSegments; j ++ ) {\n\n\t\t\tfor ( let i = 0; i <= tubularSegments; i ++ ) {\n\n\t\t\t\tconst u = i / tubularSegments * arc;\n\t\t\t\tconst v = j / radialSegments * Math.PI * 2;\n\n\t\t\t\t// vertex\n\n\t\t\t\tvertex.x = ( radius + tube * Math.cos( v ) ) * Math.cos( u );\n\t\t\t\tvertex.y = ( radius + tube * Math.cos( v ) ) * Math.sin( u );\n\t\t\t\tvertex.z = tube * Math.sin( v );\n\n\t\t\t\tvertices.push( vertex.x, vertex.y, vertex.z );\n\n\t\t\t\t// normal\n\n\t\t\t\tcenter.x = radius * Math.cos( u );\n\t\t\t\tcenter.y = radius * Math.sin( u );\n\t\t\t\tnormal.subVectors( vertex, center ).normalize();\n\n\t\t\t\tnormals.push( normal.x, normal.y, normal.z );\n\n\t\t\t\t// uv\n\n\t\t\t\tuvs.push( i / tubularSegments );\n\t\t\t\tuvs.push( j / radialSegments );\n\n\t\t\t}\n\n\t\t}\n\n\t\t// generate indices\n\n\t\tfor ( let j = 1; j <= radialSegments; j ++ ) {\n\n\t\t\tfor ( let i = 1; i <= tubularSegments; i ++ ) {\n\n\t\t\t\t// indices\n\n\t\t\t\tconst a = ( tubularSegments + 1 ) * j + i - 1;\n\t\t\t\tconst b = ( tubularSegments + 1 ) * ( j - 1 ) + i - 1;\n\t\t\t\tconst c = ( tubularSegments + 1 ) * ( j - 1 ) + i;\n\t\t\t\tconst d = ( tubularSegments + 1 ) * j + i;\n\n\t\t\t\t// faces\n\n\t\t\t\tindices.push( a, b, d );\n\t\t\t\tindices.push( b, c, d );\n\n\t\t\t}\n\n\t\t}\n\n\t\t// build geometry\n\n\t\tthis.setIndex( indices );\n\t\tthis.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\t\tthis.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );\n\t\tthis.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );\n\n\t}\n\n}\n\nclass TorusKnotGeometry extends BufferGeometry {\n\n\tconstructor( radius = 1, tube = 0.4, tubularSegments = 64, radialSegments = 8, p = 2, q = 3 ) {\n\n\t\tsuper();\n\t\tthis.type = 'TorusKnotGeometry';\n\n\t\tthis.parameters = {\n\t\t\tradius: radius,\n\t\t\ttube: tube,\n\t\t\ttubularSegments: tubularSegments,\n\t\t\tradialSegments: radialSegments,\n\t\t\tp: p,\n\t\t\tq: q\n\t\t};\n\n\t\ttubularSegments = Math.floor( tubularSegments );\n\t\tradialSegments = Math.floor( radialSegments );\n\n\t\t// buffers\n\n\t\tconst indices = [];\n\t\tconst vertices = [];\n\t\tconst normals = [];\n\t\tconst uvs = [];\n\n\t\t// helper variables\n\n\t\tconst vertex = new Vector3();\n\t\tconst normal = new Vector3();\n\n\t\tconst P1 = new Vector3();\n\t\tconst P2 = new Vector3();\n\n\t\tconst B = new Vector3();\n\t\tconst T = new Vector3();\n\t\tconst N = new Vector3();\n\n\t\t// generate vertices, normals and uvs\n\n\t\tfor ( let i = 0; i <= tubularSegments; ++ i ) {\n\n\t\t\t// the radian \"u\" is used to calculate the position on the torus curve of the current tubular segement\n\n\t\t\tconst u = i / tubularSegments * p * Math.PI * 2;\n\n\t\t\t// now we calculate two points. P1 is our current position on the curve, P2 is a little farther ahead.\n\t\t\t// these points are used to create a special \"coordinate space\", which is necessary to calculate the correct vertex positions\n\n\t\t\tcalculatePositionOnCurve( u, p, q, radius, P1 );\n\t\t\tcalculatePositionOnCurve( u + 0.01, p, q, radius, P2 );\n\n\t\t\t// calculate orthonormal basis\n\n\t\t\tT.subVectors( P2, P1 );\n\t\t\tN.addVectors( P2, P1 );\n\t\t\tB.crossVectors( T, N );\n\t\t\tN.crossVectors( B, T );\n\n\t\t\t// normalize B, N. T can be ignored, we don't use it\n\n\t\t\tB.normalize();\n\t\t\tN.normalize();\n\n\t\t\tfor ( let j = 0; j <= radialSegments; ++ j ) {\n\n\t\t\t\t// now calculate the vertices. they are nothing more than an extrusion of the torus curve.\n\t\t\t\t// because we extrude a shape in the xy-plane, there is no need to calculate a z-value.\n\n\t\t\t\tconst v = j / radialSegments * Math.PI * 2;\n\t\t\t\tconst cx = - tube * Math.cos( v );\n\t\t\t\tconst cy = tube * Math.sin( v );\n\n\t\t\t\t// now calculate the final vertex position.\n\t\t\t\t// first we orient the extrusion with our basis vectos, then we add it to the current position on the curve\n\n\t\t\t\tvertex.x = P1.x + ( cx * N.x + cy * B.x );\n\t\t\t\tvertex.y = P1.y + ( cx * N.y + cy * B.y );\n\t\t\t\tvertex.z = P1.z + ( cx * N.z + cy * B.z );\n\n\t\t\t\tvertices.push( vertex.x, vertex.y, vertex.z );\n\n\t\t\t\t// normal (P1 is always the center/origin of the extrusion, thus we can use it to calculate the normal)\n\n\t\t\t\tnormal.subVectors( vertex, P1 ).normalize();\n\n\t\t\t\tnormals.push( normal.x, normal.y, normal.z );\n\n\t\t\t\t// uv\n\n\t\t\t\tuvs.push( i / tubularSegments );\n\t\t\t\tuvs.push( j / radialSegments );\n\n\t\t\t}\n\n\t\t}\n\n\t\t// generate indices\n\n\t\tfor ( let j = 1; j <= tubularSegments; j ++ ) {\n\n\t\t\tfor ( let i = 1; i <= radialSegments; i ++ ) {\n\n\t\t\t\t// indices\n\n\t\t\t\tconst a = ( radialSegments + 1 ) * ( j - 1 ) + ( i - 1 );\n\t\t\t\tconst b = ( radialSegments + 1 ) * j + ( i - 1 );\n\t\t\t\tconst c = ( radialSegments + 1 ) * j + i;\n\t\t\t\tconst d = ( radialSegments + 1 ) * ( j - 1 ) + i;\n\n\t\t\t\t// faces\n\n\t\t\t\tindices.push( a, b, d );\n\t\t\t\tindices.push( b, c, d );\n\n\t\t\t}\n\n\t\t}\n\n\t\t// build geometry\n\n\t\tthis.setIndex( indices );\n\t\tthis.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\t\tthis.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );\n\t\tthis.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );\n\n\t\t// this function calculates the current position on the torus curve\n\n\t\tfunction calculatePositionOnCurve( u, p, q, radius, position ) {\n\n\t\t\tconst cu = Math.cos( u );\n\t\t\tconst su = Math.sin( u );\n\t\t\tconst quOverP = q / p * u;\n\t\t\tconst cs = Math.cos( quOverP );\n\n\t\t\tposition.x = radius * ( 2 + cs ) * 0.5 * cu;\n\t\t\tposition.y = radius * ( 2 + cs ) * su * 0.5;\n\t\t\tposition.z = radius * Math.sin( quOverP ) * 0.5;\n\n\t\t}\n\n\t}\n\n}\n\nclass TubeGeometry extends BufferGeometry {\n\n\tconstructor( path, tubularSegments = 64, radius = 1, radialSegments = 8, closed = false ) {\n\n\t\tsuper();\n\t\tthis.type = 'TubeGeometry';\n\n\t\tthis.parameters = {\n\t\t\tpath: path,\n\t\t\ttubularSegments: tubularSegments,\n\t\t\tradius: radius,\n\t\t\tradialSegments: radialSegments,\n\t\t\tclosed: closed\n\t\t};\n\n\t\tconst frames = path.computeFrenetFrames( tubularSegments, closed );\n\n\t\t// expose internals\n\n\t\tthis.tangents = frames.tangents;\n\t\tthis.normals = frames.normals;\n\t\tthis.binormals = frames.binormals;\n\n\t\t// helper variables\n\n\t\tconst vertex = new Vector3();\n\t\tconst normal = new Vector3();\n\t\tconst uv = new Vector2();\n\t\tlet P = new Vector3();\n\n\t\t// buffer\n\n\t\tconst vertices = [];\n\t\tconst normals = [];\n\t\tconst uvs = [];\n\t\tconst indices = [];\n\n\t\t// create buffer data\n\n\t\tgenerateBufferData();\n\n\t\t// build geometry\n\n\t\tthis.setIndex( indices );\n\t\tthis.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\t\tthis.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );\n\t\tthis.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );\n\n\t\t// functions\n\n\t\tfunction generateBufferData() {\n\n\t\t\tfor ( let i = 0; i < tubularSegments; i ++ ) {\n\n\t\t\t\tgenerateSegment( i );\n\n\t\t\t}\n\n\t\t\t// if the geometry is not closed, generate the last row of vertices and normals\n\t\t\t// at the regular position on the given path\n\t\t\t//\n\t\t\t// if the geometry is closed, duplicate the first row of vertices and normals (uvs will differ)\n\n\t\t\tgenerateSegment( ( closed === false ) ? tubularSegments : 0 );\n\n\t\t\t// uvs are generated in a separate function.\n\t\t\t// this makes it easy compute correct values for closed geometries\n\n\t\t\tgenerateUVs();\n\n\t\t\t// finally create faces\n\n\t\t\tgenerateIndices();\n\n\t\t}\n\n\t\tfunction generateSegment( i ) {\n\n\t\t\t// we use getPointAt to sample evenly distributed points from the given path\n\n\t\t\tP = path.getPointAt( i / tubularSegments, P );\n\n\t\t\t// retrieve corresponding normal and binormal\n\n\t\t\tconst N = frames.normals[ i ];\n\t\t\tconst B = frames.binormals[ i ];\n\n\t\t\t// generate normals and vertices for the current segment\n\n\t\t\tfor ( let j = 0; j <= radialSegments; j ++ ) {\n\n\t\t\t\tconst v = j / radialSegments * Math.PI * 2;\n\n\t\t\t\tconst sin = Math.sin( v );\n\t\t\t\tconst cos = - Math.cos( v );\n\n\t\t\t\t// normal\n\n\t\t\t\tnormal.x = ( cos * N.x + sin * B.x );\n\t\t\t\tnormal.y = ( cos * N.y + sin * B.y );\n\t\t\t\tnormal.z = ( cos * N.z + sin * B.z );\n\t\t\t\tnormal.normalize();\n\n\t\t\t\tnormals.push( normal.x, normal.y, normal.z );\n\n\t\t\t\t// vertex\n\n\t\t\t\tvertex.x = P.x + radius * normal.x;\n\t\t\t\tvertex.y = P.y + radius * normal.y;\n\t\t\t\tvertex.z = P.z + radius * normal.z;\n\n\t\t\t\tvertices.push( vertex.x, vertex.y, vertex.z );\n\n\t\t\t}\n\n\t\t}\n\n\t\tfunction generateIndices() {\n\n\t\t\tfor ( let j = 1; j <= tubularSegments; j ++ ) {\n\n\t\t\t\tfor ( let i = 1; i <= radialSegments; i ++ ) {\n\n\t\t\t\t\tconst a = ( radialSegments + 1 ) * ( j - 1 ) + ( i - 1 );\n\t\t\t\t\tconst b = ( radialSegments + 1 ) * j + ( i - 1 );\n\t\t\t\t\tconst c = ( radialSegments + 1 ) * j + i;\n\t\t\t\t\tconst d = ( radialSegments + 1 ) * ( j - 1 ) + i;\n\n\t\t\t\t\t// faces\n\n\t\t\t\t\tindices.push( a, b, d );\n\t\t\t\t\tindices.push( b, c, d );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\tfunction generateUVs() {\n\n\t\t\tfor ( let i = 0; i <= tubularSegments; i ++ ) {\n\n\t\t\t\tfor ( let j = 0; j <= radialSegments; j ++ ) {\n\n\t\t\t\t\tuv.x = i / tubularSegments;\n\t\t\t\t\tuv.y = j / radialSegments;\n\n\t\t\t\t\tuvs.push( uv.x, uv.y );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\ttoJSON() {\n\n\t\tconst data = BufferGeometry.prototype.toJSON.call( this );\n\n\t\tdata.path = this.parameters.path.toJSON();\n\n\t\treturn data;\n\n\t}\n\n}\n\nclass WireframeGeometry extends BufferGeometry {\n\n\tconstructor( geometry ) {\n\n\t\tsuper();\n\t\tthis.type = 'WireframeGeometry';\n\n\t\tif ( geometry.isGeometry === true ) {\n\n\t\t\tconsole.error( 'THREE.WireframeGeometry no longer supports THREE.Geometry. Use THREE.BufferGeometry instead.' );\n\t\t\treturn;\n\n\t\t}\n\n\t\t// buffer\n\n\t\tconst vertices = [];\n\n\t\t// helper variables\n\n\t\tconst edge = [ 0, 0 ], edges = {};\n\n\t\tconst vertex = new Vector3();\n\n\t\tif ( geometry.index !== null ) {\n\n\t\t\t// indexed BufferGeometry\n\n\t\t\tconst position = geometry.attributes.position;\n\t\t\tconst indices = geometry.index;\n\t\t\tlet groups = geometry.groups;\n\n\t\t\tif ( groups.length === 0 ) {\n\n\t\t\t\tgroups = [ { start: 0, count: indices.count, materialIndex: 0 } ];\n\n\t\t\t}\n\n\t\t\t// create a data structure that contains all eges without duplicates\n\n\t\t\tfor ( let o = 0, ol = groups.length; o < ol; ++ o ) {\n\n\t\t\t\tconst group = groups[ o ];\n\n\t\t\t\tconst start = group.start;\n\t\t\t\tconst count = group.count;\n\n\t\t\t\tfor ( let i = start, l = ( start + count ); i < l; i += 3 ) {\n\n\t\t\t\t\tfor ( let j = 0; j < 3; j ++ ) {\n\n\t\t\t\t\t\tconst edge1 = indices.getX( i + j );\n\t\t\t\t\t\tconst edge2 = indices.getX( i + ( j + 1 ) % 3 );\n\t\t\t\t\t\tedge[ 0 ] = Math.min( edge1, edge2 ); // sorting prevents duplicates\n\t\t\t\t\t\tedge[ 1 ] = Math.max( edge1, edge2 );\n\n\t\t\t\t\t\tconst key = edge[ 0 ] + ',' + edge[ 1 ];\n\n\t\t\t\t\t\tif ( edges[ key ] === undefined ) {\n\n\t\t\t\t\t\t\tedges[ key ] = { index1: edge[ 0 ], index2: edge[ 1 ] };\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\t// generate vertices\n\n\t\t\tfor ( const key in edges ) {\n\n\t\t\t\tconst e = edges[ key ];\n\n\t\t\t\tvertex.fromBufferAttribute( position, e.index1 );\n\t\t\t\tvertices.push( vertex.x, vertex.y, vertex.z );\n\n\t\t\t\tvertex.fromBufferAttribute( position, e.index2 );\n\t\t\t\tvertices.push( vertex.x, vertex.y, vertex.z );\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\t// non-indexed BufferGeometry\n\n\t\t\tconst position = geometry.attributes.position;\n\n\t\t\tfor ( let i = 0, l = ( position.count / 3 ); i < l; i ++ ) {\n\n\t\t\t\tfor ( let j = 0; j < 3; j ++ ) {\n\n\t\t\t\t\t// three edges per triangle, an edge is represented as (index1, index2)\n\t\t\t\t\t// e.g. the first triangle has the following edges: (0,1),(1,2),(2,0)\n\n\t\t\t\t\tconst index1 = 3 * i + j;\n\t\t\t\t\tvertex.fromBufferAttribute( position, index1 );\n\t\t\t\t\tvertices.push( vertex.x, vertex.y, vertex.z );\n\n\t\t\t\t\tconst index2 = 3 * i + ( ( j + 1 ) % 3 );\n\t\t\t\t\tvertex.fromBufferAttribute( position, index2 );\n\t\t\t\t\tvertices.push( vertex.x, vertex.y, vertex.z );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\t// build geometry\n\n\t\tthis.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\n\t}\n\n}\n\nvar Geometries = /*#__PURE__*/Object.freeze({\n\t__proto__: null,\n\tBoxGeometry: BoxGeometry,\n\tBoxBufferGeometry: BoxGeometry,\n\tCircleGeometry: CircleGeometry,\n\tCircleBufferGeometry: CircleGeometry,\n\tConeGeometry: ConeGeometry,\n\tConeBufferGeometry: ConeGeometry,\n\tCylinderGeometry: CylinderGeometry,\n\tCylinderBufferGeometry: CylinderGeometry,\n\tDodecahedronGeometry: DodecahedronGeometry,\n\tDodecahedronBufferGeometry: DodecahedronGeometry,\n\tEdgesGeometry: EdgesGeometry,\n\tExtrudeGeometry: ExtrudeGeometry,\n\tExtrudeBufferGeometry: ExtrudeGeometry,\n\tIcosahedronGeometry: IcosahedronGeometry,\n\tIcosahedronBufferGeometry: IcosahedronGeometry,\n\tLatheGeometry: LatheGeometry,\n\tLatheBufferGeometry: LatheGeometry,\n\tOctahedronGeometry: OctahedronGeometry,\n\tOctahedronBufferGeometry: OctahedronGeometry,\n\tParametricGeometry: ParametricGeometry,\n\tParametricBufferGeometry: ParametricGeometry,\n\tPlaneGeometry: PlaneGeometry,\n\tPlaneBufferGeometry: PlaneGeometry,\n\tPolyhedronGeometry: PolyhedronGeometry,\n\tPolyhedronBufferGeometry: PolyhedronGeometry,\n\tRingGeometry: RingGeometry,\n\tRingBufferGeometry: RingGeometry,\n\tShapeGeometry: ShapeGeometry,\n\tShapeBufferGeometry: ShapeGeometry,\n\tSphereGeometry: SphereGeometry,\n\tSphereBufferGeometry: SphereGeometry,\n\tTetrahedronGeometry: TetrahedronGeometry,\n\tTetrahedronBufferGeometry: TetrahedronGeometry,\n\tTextGeometry: TextGeometry,\n\tTextBufferGeometry: TextGeometry,\n\tTorusGeometry: TorusGeometry,\n\tTorusBufferGeometry: TorusGeometry,\n\tTorusKnotGeometry: TorusKnotGeometry,\n\tTorusKnotBufferGeometry: TorusKnotGeometry,\n\tTubeGeometry: TubeGeometry,\n\tTubeBufferGeometry: TubeGeometry,\n\tWireframeGeometry: WireframeGeometry\n});\n\n/**\n * parameters = {\n *  color: <THREE.Color>\n * }\n */\n\nfunction ShadowMaterial( parameters ) {\n\n\tMaterial.call( this );\n\n\tthis.type = 'ShadowMaterial';\n\n\tthis.color = new Color( 0x000000 );\n\tthis.transparent = true;\n\n\tthis.setValues( parameters );\n\n}\n\nShadowMaterial.prototype = Object.create( Material.prototype );\nShadowMaterial.prototype.constructor = ShadowMaterial;\n\nShadowMaterial.prototype.isShadowMaterial = true;\n\nShadowMaterial.prototype.copy = function ( source ) {\n\n\tMaterial.prototype.copy.call( this, source );\n\n\tthis.color.copy( source.color );\n\n\treturn this;\n\n};\n\nfunction RawShaderMaterial( parameters ) {\n\n\tShaderMaterial.call( this, parameters );\n\n\tthis.type = 'RawShaderMaterial';\n\n}\n\nRawShaderMaterial.prototype = Object.create( ShaderMaterial.prototype );\nRawShaderMaterial.prototype.constructor = RawShaderMaterial;\n\nRawShaderMaterial.prototype.isRawShaderMaterial = true;\n\n/**\n * parameters = {\n *  color: <hex>,\n *  roughness: <float>,\n *  metalness: <float>,\n *  opacity: <float>,\n *\n *  map: new THREE.Texture( <Image> ),\n *\n *  lightMap: new THREE.Texture( <Image> ),\n *  lightMapIntensity: <float>\n *\n *  aoMap: new THREE.Texture( <Image> ),\n *  aoMapIntensity: <float>\n *\n *  emissive: <hex>,\n *  emissiveIntensity: <float>\n *  emissiveMap: new THREE.Texture( <Image> ),\n *\n *  bumpMap: new THREE.Texture( <Image> ),\n *  bumpScale: <float>,\n *\n *  normalMap: new THREE.Texture( <Image> ),\n *  normalMapType: THREE.TangentSpaceNormalMap,\n *  normalScale: <Vector2>,\n *\n *  displacementMap: new THREE.Texture( <Image> ),\n *  displacementScale: <float>,\n *  displacementBias: <float>,\n *\n *  roughnessMap: new THREE.Texture( <Image> ),\n *\n *  metalnessMap: new THREE.Texture( <Image> ),\n *\n *  alphaMap: new THREE.Texture( <Image> ),\n *\n *  envMap: new THREE.CubeTexture( [posx, negx, posy, negy, posz, negz] ),\n *  envMapIntensity: <float>\n *\n *  refractionRatio: <float>,\n *\n *  wireframe: <boolean>,\n *  wireframeLinewidth: <float>,\n *\n *  skinning: <bool>,\n *  morphTargets: <bool>,\n *  morphNormals: <bool>\n * }\n */\n\nfunction MeshStandardMaterial( parameters ) {\n\n\tMaterial.call( this );\n\n\tthis.defines = { 'STANDARD': '' };\n\n\tthis.type = 'MeshStandardMaterial';\n\n\tthis.color = new Color( 0xffffff ); // diffuse\n\tthis.roughness = 1.0;\n\tthis.metalness = 0.0;\n\n\tthis.map = null;\n\n\tthis.lightMap = null;\n\tthis.lightMapIntensity = 1.0;\n\n\tthis.aoMap = null;\n\tthis.aoMapIntensity = 1.0;\n\n\tthis.emissive = new Color( 0x000000 );\n\tthis.emissiveIntensity = 1.0;\n\tthis.emissiveMap = null;\n\n\tthis.bumpMap = null;\n\tthis.bumpScale = 1;\n\n\tthis.normalMap = null;\n\tthis.normalMapType = TangentSpaceNormalMap;\n\tthis.normalScale = new Vector2( 1, 1 );\n\n\tthis.displacementMap = null;\n\tthis.displacementScale = 1;\n\tthis.displacementBias = 0;\n\n\tthis.roughnessMap = null;\n\n\tthis.metalnessMap = null;\n\n\tthis.alphaMap = null;\n\n\tthis.envMap = null;\n\tthis.envMapIntensity = 1.0;\n\n\tthis.refractionRatio = 0.98;\n\n\tthis.wireframe = false;\n\tthis.wireframeLinewidth = 1;\n\tthis.wireframeLinecap = 'round';\n\tthis.wireframeLinejoin = 'round';\n\n\tthis.skinning = false;\n\tthis.morphTargets = false;\n\tthis.morphNormals = false;\n\n\tthis.vertexTangents = false;\n\n\tthis.setValues( parameters );\n\n}\n\nMeshStandardMaterial.prototype = Object.create( Material.prototype );\nMeshStandardMaterial.prototype.constructor = MeshStandardMaterial;\n\nMeshStandardMaterial.prototype.isMeshStandardMaterial = true;\n\nMeshStandardMaterial.prototype.copy = function ( source ) {\n\n\tMaterial.prototype.copy.call( this, source );\n\n\tthis.defines = { 'STANDARD': '' };\n\n\tthis.color.copy( source.color );\n\tthis.roughness = source.roughness;\n\tthis.metalness = source.metalness;\n\n\tthis.map = source.map;\n\n\tthis.lightMap = source.lightMap;\n\tthis.lightMapIntensity = source.lightMapIntensity;\n\n\tthis.aoMap = source.aoMap;\n\tthis.aoMapIntensity = source.aoMapIntensity;\n\n\tthis.emissive.copy( source.emissive );\n\tthis.emissiveMap = source.emissiveMap;\n\tthis.emissiveIntensity = source.emissiveIntensity;\n\n\tthis.bumpMap = source.bumpMap;\n\tthis.bumpScale = source.bumpScale;\n\n\tthis.normalMap = source.normalMap;\n\tthis.normalMapType = source.normalMapType;\n\tthis.normalScale.copy( source.normalScale );\n\n\tthis.displacementMap = source.displacementMap;\n\tthis.displacementScale = source.displacementScale;\n\tthis.displacementBias = source.displacementBias;\n\n\tthis.roughnessMap = source.roughnessMap;\n\n\tthis.metalnessMap = source.metalnessMap;\n\n\tthis.alphaMap = source.alphaMap;\n\n\tthis.envMap = source.envMap;\n\tthis.envMapIntensity = source.envMapIntensity;\n\n\tthis.refractionRatio = source.refractionRatio;\n\n\tthis.wireframe = source.wireframe;\n\tthis.wireframeLinewidth = source.wireframeLinewidth;\n\tthis.wireframeLinecap = source.wireframeLinecap;\n\tthis.wireframeLinejoin = source.wireframeLinejoin;\n\n\tthis.skinning = source.skinning;\n\tthis.morphTargets = source.morphTargets;\n\tthis.morphNormals = source.morphNormals;\n\n\tthis.vertexTangents = source.vertexTangents;\n\n\treturn this;\n\n};\n\n/**\n * parameters = {\n *  clearcoat: <float>,\n *  clearcoatMap: new THREE.Texture( <Image> ),\n *  clearcoatRoughness: <float>,\n *  clearcoatRoughnessMap: new THREE.Texture( <Image> ),\n *  clearcoatNormalScale: <Vector2>,\n *  clearcoatNormalMap: new THREE.Texture( <Image> ),\n *\n *  reflectivity: <float>,\n *  ior: <float>,\n *\n *  sheen: <Color>,\n *\n *  transmission: <float>,\n *  transmissionMap: new THREE.Texture( <Image> )\n * }\n */\n\nfunction MeshPhysicalMaterial( parameters ) {\n\n\tMeshStandardMaterial.call( this );\n\n\tthis.defines = {\n\n\t\t'STANDARD': '',\n\t\t'PHYSICAL': ''\n\n\t};\n\n\tthis.type = 'MeshPhysicalMaterial';\n\n\tthis.clearcoat = 0.0;\n\tthis.clearcoatMap = null;\n\tthis.clearcoatRoughness = 0.0;\n\tthis.clearcoatRoughnessMap = null;\n\tthis.clearcoatNormalScale = new Vector2( 1, 1 );\n\tthis.clearcoatNormalMap = null;\n\n\tthis.reflectivity = 0.5; // maps to F0 = 0.04\n\n\tObject.defineProperty( this, 'ior', {\n\t\tget: function () {\n\n\t\t\treturn ( 1 + 0.4 * this.reflectivity ) / ( 1 - 0.4 * this.reflectivity );\n\n\t\t},\n\t\tset: function ( ior ) {\n\n\t\t\tthis.reflectivity = MathUtils.clamp( 2.5 * ( ior - 1 ) / ( ior + 1 ), 0, 1 );\n\n\t\t}\n\t} );\n\n\tthis.sheen = null; // null will disable sheen bsdf\n\n\tthis.transmission = 0.0;\n\tthis.transmissionMap = null;\n\n\tthis.setValues( parameters );\n\n}\n\nMeshPhysicalMaterial.prototype = Object.create( MeshStandardMaterial.prototype );\nMeshPhysicalMaterial.prototype.constructor = MeshPhysicalMaterial;\n\nMeshPhysicalMaterial.prototype.isMeshPhysicalMaterial = true;\n\nMeshPhysicalMaterial.prototype.copy = function ( source ) {\n\n\tMeshStandardMaterial.prototype.copy.call( this, source );\n\n\tthis.defines = {\n\n\t\t'STANDARD': '',\n\t\t'PHYSICAL': ''\n\n\t};\n\n\tthis.clearcoat = source.clearcoat;\n\tthis.clearcoatMap = source.clearcoatMap;\n\tthis.clearcoatRoughness = source.clearcoatRoughness;\n\tthis.clearcoatRoughnessMap = source.clearcoatRoughnessMap;\n\tthis.clearcoatNormalMap = source.clearcoatNormalMap;\n\tthis.clearcoatNormalScale.copy( source.clearcoatNormalScale );\n\n\tthis.reflectivity = source.reflectivity;\n\n\tif ( source.sheen ) {\n\n\t\tthis.sheen = ( this.sheen || new Color() ).copy( source.sheen );\n\n\t} else {\n\n\t\tthis.sheen = null;\n\n\t}\n\n\tthis.transmission = source.transmission;\n\tthis.transmissionMap = source.transmissionMap;\n\n\treturn this;\n\n};\n\n/**\n * parameters = {\n *  color: <hex>,\n *  specular: <hex>,\n *  shininess: <float>,\n *  opacity: <float>,\n *\n *  map: new THREE.Texture( <Image> ),\n *\n *  lightMap: new THREE.Texture( <Image> ),\n *  lightMapIntensity: <float>\n *\n *  aoMap: new THREE.Texture( <Image> ),\n *  aoMapIntensity: <float>\n *\n *  emissive: <hex>,\n *  emissiveIntensity: <float>\n *  emissiveMap: new THREE.Texture( <Image> ),\n *\n *  bumpMap: new THREE.Texture( <Image> ),\n *  bumpScale: <float>,\n *\n *  normalMap: new THREE.Texture( <Image> ),\n *  normalMapType: THREE.TangentSpaceNormalMap,\n *  normalScale: <Vector2>,\n *\n *  displacementMap: new THREE.Texture( <Image> ),\n *  displacementScale: <float>,\n *  displacementBias: <float>,\n *\n *  specularMap: new THREE.Texture( <Image> ),\n *\n *  alphaMap: new THREE.Texture( <Image> ),\n *\n *  envMap: new THREE.CubeTexture( [posx, negx, posy, negy, posz, negz] ),\n *  combine: THREE.MultiplyOperation,\n *  reflectivity: <float>,\n *  refractionRatio: <float>,\n *\n *  wireframe: <boolean>,\n *  wireframeLinewidth: <float>,\n *\n *  skinning: <bool>,\n *  morphTargets: <bool>,\n *  morphNormals: <bool>\n * }\n */\n\nfunction MeshPhongMaterial( parameters ) {\n\n\tMaterial.call( this );\n\n\tthis.type = 'MeshPhongMaterial';\n\n\tthis.color = new Color( 0xffffff ); // diffuse\n\tthis.specular = new Color( 0x111111 );\n\tthis.shininess = 30;\n\n\tthis.map = null;\n\n\tthis.lightMap = null;\n\tthis.lightMapIntensity = 1.0;\n\n\tthis.aoMap = null;\n\tthis.aoMapIntensity = 1.0;\n\n\tthis.emissive = new Color( 0x000000 );\n\tthis.emissiveIntensity = 1.0;\n\tthis.emissiveMap = null;\n\n\tthis.bumpMap = null;\n\tthis.bumpScale = 1;\n\n\tthis.normalMap = null;\n\tthis.normalMapType = TangentSpaceNormalMap;\n\tthis.normalScale = new Vector2( 1, 1 );\n\n\tthis.displacementMap = null;\n\tthis.displacementScale = 1;\n\tthis.displacementBias = 0;\n\n\tthis.specularMap = null;\n\n\tthis.alphaMap = null;\n\n\tthis.envMap = null;\n\tthis.combine = MultiplyOperation;\n\tthis.reflectivity = 1;\n\tthis.refractionRatio = 0.98;\n\n\tthis.wireframe = false;\n\tthis.wireframeLinewidth = 1;\n\tthis.wireframeLinecap = 'round';\n\tthis.wireframeLinejoin = 'round';\n\n\tthis.skinning = false;\n\tthis.morphTargets = false;\n\tthis.morphNormals = false;\n\n\tthis.setValues( parameters );\n\n}\n\nMeshPhongMaterial.prototype = Object.create( Material.prototype );\nMeshPhongMaterial.prototype.constructor = MeshPhongMaterial;\n\nMeshPhongMaterial.prototype.isMeshPhongMaterial = true;\n\nMeshPhongMaterial.prototype.copy = function ( source ) {\n\n\tMaterial.prototype.copy.call( this, source );\n\n\tthis.color.copy( source.color );\n\tthis.specular.copy( source.specular );\n\tthis.shininess = source.shininess;\n\n\tthis.map = source.map;\n\n\tthis.lightMap = source.lightMap;\n\tthis.lightMapIntensity = source.lightMapIntensity;\n\n\tthis.aoMap = source.aoMap;\n\tthis.aoMapIntensity = source.aoMapIntensity;\n\n\tthis.emissive.copy( source.emissive );\n\tthis.emissiveMap = source.emissiveMap;\n\tthis.emissiveIntensity = source.emissiveIntensity;\n\n\tthis.bumpMap = source.bumpMap;\n\tthis.bumpScale = source.bumpScale;\n\n\tthis.normalMap = source.normalMap;\n\tthis.normalMapType = source.normalMapType;\n\tthis.normalScale.copy( source.normalScale );\n\n\tthis.displacementMap = source.displacementMap;\n\tthis.displacementScale = source.displacementScale;\n\tthis.displacementBias = source.displacementBias;\n\n\tthis.specularMap = source.specularMap;\n\n\tthis.alphaMap = source.alphaMap;\n\n\tthis.envMap = source.envMap;\n\tthis.combine = source.combine;\n\tthis.reflectivity = source.reflectivity;\n\tthis.refractionRatio = source.refractionRatio;\n\n\tthis.wireframe = source.wireframe;\n\tthis.wireframeLinewidth = source.wireframeLinewidth;\n\tthis.wireframeLinecap = source.wireframeLinecap;\n\tthis.wireframeLinejoin = source.wireframeLinejoin;\n\n\tthis.skinning = source.skinning;\n\tthis.morphTargets = source.morphTargets;\n\tthis.morphNormals = source.morphNormals;\n\n\treturn this;\n\n};\n\n/**\n * parameters = {\n *  color: <hex>,\n *\n *  map: new THREE.Texture( <Image> ),\n *  gradientMap: new THREE.Texture( <Image> ),\n *\n *  lightMap: new THREE.Texture( <Image> ),\n *  lightMapIntensity: <float>\n *\n *  aoMap: new THREE.Texture( <Image> ),\n *  aoMapIntensity: <float>\n *\n *  emissive: <hex>,\n *  emissiveIntensity: <float>\n *  emissiveMap: new THREE.Texture( <Image> ),\n *\n *  bumpMap: new THREE.Texture( <Image> ),\n *  bumpScale: <float>,\n *\n *  normalMap: new THREE.Texture( <Image> ),\n *  normalMapType: THREE.TangentSpaceNormalMap,\n *  normalScale: <Vector2>,\n *\n *  displacementMap: new THREE.Texture( <Image> ),\n *  displacementScale: <float>,\n *  displacementBias: <float>,\n *\n *  alphaMap: new THREE.Texture( <Image> ),\n *\n *  wireframe: <boolean>,\n *  wireframeLinewidth: <float>,\n *\n *  skinning: <bool>,\n *  morphTargets: <bool>,\n *  morphNormals: <bool>\n * }\n */\n\nfunction MeshToonMaterial( parameters ) {\n\n\tMaterial.call( this );\n\n\tthis.defines = { 'TOON': '' };\n\n\tthis.type = 'MeshToonMaterial';\n\n\tthis.color = new Color( 0xffffff );\n\n\tthis.map = null;\n\tthis.gradientMap = null;\n\n\tthis.lightMap = null;\n\tthis.lightMapIntensity = 1.0;\n\n\tthis.aoMap = null;\n\tthis.aoMapIntensity = 1.0;\n\n\tthis.emissive = new Color( 0x000000 );\n\tthis.emissiveIntensity = 1.0;\n\tthis.emissiveMap = null;\n\n\tthis.bumpMap = null;\n\tthis.bumpScale = 1;\n\n\tthis.normalMap = null;\n\tthis.normalMapType = TangentSpaceNormalMap;\n\tthis.normalScale = new Vector2( 1, 1 );\n\n\tthis.displacementMap = null;\n\tthis.displacementScale = 1;\n\tthis.displacementBias = 0;\n\n\tthis.alphaMap = null;\n\n\tthis.wireframe = false;\n\tthis.wireframeLinewidth = 1;\n\tthis.wireframeLinecap = 'round';\n\tthis.wireframeLinejoin = 'round';\n\n\tthis.skinning = false;\n\tthis.morphTargets = false;\n\tthis.morphNormals = false;\n\n\tthis.setValues( parameters );\n\n}\n\nMeshToonMaterial.prototype = Object.create( Material.prototype );\nMeshToonMaterial.prototype.constructor = MeshToonMaterial;\n\nMeshToonMaterial.prototype.isMeshToonMaterial = true;\n\nMeshToonMaterial.prototype.copy = function ( source ) {\n\n\tMaterial.prototype.copy.call( this, source );\n\n\tthis.color.copy( source.color );\n\n\tthis.map = source.map;\n\tthis.gradientMap = source.gradientMap;\n\n\tthis.lightMap = source.lightMap;\n\tthis.lightMapIntensity = source.lightMapIntensity;\n\n\tthis.aoMap = source.aoMap;\n\tthis.aoMapIntensity = source.aoMapIntensity;\n\n\tthis.emissive.copy( source.emissive );\n\tthis.emissiveMap = source.emissiveMap;\n\tthis.emissiveIntensity = source.emissiveIntensity;\n\n\tthis.bumpMap = source.bumpMap;\n\tthis.bumpScale = source.bumpScale;\n\n\tthis.normalMap = source.normalMap;\n\tthis.normalMapType = source.normalMapType;\n\tthis.normalScale.copy( source.normalScale );\n\n\tthis.displacementMap = source.displacementMap;\n\tthis.displacementScale = source.displacementScale;\n\tthis.displacementBias = source.displacementBias;\n\n\tthis.alphaMap = source.alphaMap;\n\n\tthis.wireframe = source.wireframe;\n\tthis.wireframeLinewidth = source.wireframeLinewidth;\n\tthis.wireframeLinecap = source.wireframeLinecap;\n\tthis.wireframeLinejoin = source.wireframeLinejoin;\n\n\tthis.skinning = source.skinning;\n\tthis.morphTargets = source.morphTargets;\n\tthis.morphNormals = source.morphNormals;\n\n\treturn this;\n\n};\n\n/**\n * parameters = {\n *  opacity: <float>,\n *\n *  bumpMap: new THREE.Texture( <Image> ),\n *  bumpScale: <float>,\n *\n *  normalMap: new THREE.Texture( <Image> ),\n *  normalMapType: THREE.TangentSpaceNormalMap,\n *  normalScale: <Vector2>,\n *\n *  displacementMap: new THREE.Texture( <Image> ),\n *  displacementScale: <float>,\n *  displacementBias: <float>,\n *\n *  wireframe: <boolean>,\n *  wireframeLinewidth: <float>\n *\n *  skinning: <bool>,\n *  morphTargets: <bool>,\n *  morphNormals: <bool>\n * }\n */\n\nfunction MeshNormalMaterial( parameters ) {\n\n\tMaterial.call( this );\n\n\tthis.type = 'MeshNormalMaterial';\n\n\tthis.bumpMap = null;\n\tthis.bumpScale = 1;\n\n\tthis.normalMap = null;\n\tthis.normalMapType = TangentSpaceNormalMap;\n\tthis.normalScale = new Vector2( 1, 1 );\n\n\tthis.displacementMap = null;\n\tthis.displacementScale = 1;\n\tthis.displacementBias = 0;\n\n\tthis.wireframe = false;\n\tthis.wireframeLinewidth = 1;\n\n\tthis.fog = false;\n\n\tthis.skinning = false;\n\tthis.morphTargets = false;\n\tthis.morphNormals = false;\n\n\tthis.setValues( parameters );\n\n}\n\nMeshNormalMaterial.prototype = Object.create( Material.prototype );\nMeshNormalMaterial.prototype.constructor = MeshNormalMaterial;\n\nMeshNormalMaterial.prototype.isMeshNormalMaterial = true;\n\nMeshNormalMaterial.prototype.copy = function ( source ) {\n\n\tMaterial.prototype.copy.call( this, source );\n\n\tthis.bumpMap = source.bumpMap;\n\tthis.bumpScale = source.bumpScale;\n\n\tthis.normalMap = source.normalMap;\n\tthis.normalMapType = source.normalMapType;\n\tthis.normalScale.copy( source.normalScale );\n\n\tthis.displacementMap = source.displacementMap;\n\tthis.displacementScale = source.displacementScale;\n\tthis.displacementBias = source.displacementBias;\n\n\tthis.wireframe = source.wireframe;\n\tthis.wireframeLinewidth = source.wireframeLinewidth;\n\n\tthis.skinning = source.skinning;\n\tthis.morphTargets = source.morphTargets;\n\tthis.morphNormals = source.morphNormals;\n\n\treturn this;\n\n};\n\n/**\n * parameters = {\n *  color: <hex>,\n *  opacity: <float>,\n *\n *  map: new THREE.Texture( <Image> ),\n *\n *  lightMap: new THREE.Texture( <Image> ),\n *  lightMapIntensity: <float>\n *\n *  aoMap: new THREE.Texture( <Image> ),\n *  aoMapIntensity: <float>\n *\n *  emissive: <hex>,\n *  emissiveIntensity: <float>\n *  emissiveMap: new THREE.Texture( <Image> ),\n *\n *  specularMap: new THREE.Texture( <Image> ),\n *\n *  alphaMap: new THREE.Texture( <Image> ),\n *\n *  envMap: new THREE.CubeTexture( [posx, negx, posy, negy, posz, negz] ),\n *  combine: THREE.Multiply,\n *  reflectivity: <float>,\n *  refractionRatio: <float>,\n *\n *  wireframe: <boolean>,\n *  wireframeLinewidth: <float>,\n *\n *  skinning: <bool>,\n *  morphTargets: <bool>,\n *  morphNormals: <bool>\n * }\n */\n\nfunction MeshLambertMaterial( parameters ) {\n\n\tMaterial.call( this );\n\n\tthis.type = 'MeshLambertMaterial';\n\n\tthis.color = new Color( 0xffffff ); // diffuse\n\n\tthis.map = null;\n\n\tthis.lightMap = null;\n\tthis.lightMapIntensity = 1.0;\n\n\tthis.aoMap = null;\n\tthis.aoMapIntensity = 1.0;\n\n\tthis.emissive = new Color( 0x000000 );\n\tthis.emissiveIntensity = 1.0;\n\tthis.emissiveMap = null;\n\n\tthis.specularMap = null;\n\n\tthis.alphaMap = null;\n\n\tthis.envMap = null;\n\tthis.combine = MultiplyOperation;\n\tthis.reflectivity = 1;\n\tthis.refractionRatio = 0.98;\n\n\tthis.wireframe = false;\n\tthis.wireframeLinewidth = 1;\n\tthis.wireframeLinecap = 'round';\n\tthis.wireframeLinejoin = 'round';\n\n\tthis.skinning = false;\n\tthis.morphTargets = false;\n\tthis.morphNormals = false;\n\n\tthis.setValues( parameters );\n\n}\n\nMeshLambertMaterial.prototype = Object.create( Material.prototype );\nMeshLambertMaterial.prototype.constructor = MeshLambertMaterial;\n\nMeshLambertMaterial.prototype.isMeshLambertMaterial = true;\n\nMeshLambertMaterial.prototype.copy = function ( source ) {\n\n\tMaterial.prototype.copy.call( this, source );\n\n\tthis.color.copy( source.color );\n\n\tthis.map = source.map;\n\n\tthis.lightMap = source.lightMap;\n\tthis.lightMapIntensity = source.lightMapIntensity;\n\n\tthis.aoMap = source.aoMap;\n\tthis.aoMapIntensity = source.aoMapIntensity;\n\n\tthis.emissive.copy( source.emissive );\n\tthis.emissiveMap = source.emissiveMap;\n\tthis.emissiveIntensity = source.emissiveIntensity;\n\n\tthis.specularMap = source.specularMap;\n\n\tthis.alphaMap = source.alphaMap;\n\n\tthis.envMap = source.envMap;\n\tthis.combine = source.combine;\n\tthis.reflectivity = source.reflectivity;\n\tthis.refractionRatio = source.refractionRatio;\n\n\tthis.wireframe = source.wireframe;\n\tthis.wireframeLinewidth = source.wireframeLinewidth;\n\tthis.wireframeLinecap = source.wireframeLinecap;\n\tthis.wireframeLinejoin = source.wireframeLinejoin;\n\n\tthis.skinning = source.skinning;\n\tthis.morphTargets = source.morphTargets;\n\tthis.morphNormals = source.morphNormals;\n\n\treturn this;\n\n};\n\n/**\n * parameters = {\n *  color: <hex>,\n *  opacity: <float>,\n *\n *  matcap: new THREE.Texture( <Image> ),\n *\n *  map: new THREE.Texture( <Image> ),\n *\n *  bumpMap: new THREE.Texture( <Image> ),\n *  bumpScale: <float>,\n *\n *  normalMap: new THREE.Texture( <Image> ),\n *  normalMapType: THREE.TangentSpaceNormalMap,\n *  normalScale: <Vector2>,\n *\n *  displacementMap: new THREE.Texture( <Image> ),\n *  displacementScale: <float>,\n *  displacementBias: <float>,\n *\n *  alphaMap: new THREE.Texture( <Image> ),\n *\n *  skinning: <bool>,\n *  morphTargets: <bool>,\n *  morphNormals: <bool>\n * }\n */\n\nfunction MeshMatcapMaterial( parameters ) {\n\n\tMaterial.call( this );\n\n\tthis.defines = { 'MATCAP': '' };\n\n\tthis.type = 'MeshMatcapMaterial';\n\n\tthis.color = new Color( 0xffffff ); // diffuse\n\n\tthis.matcap = null;\n\n\tthis.map = null;\n\n\tthis.bumpMap = null;\n\tthis.bumpScale = 1;\n\n\tthis.normalMap = null;\n\tthis.normalMapType = TangentSpaceNormalMap;\n\tthis.normalScale = new Vector2( 1, 1 );\n\n\tthis.displacementMap = null;\n\tthis.displacementScale = 1;\n\tthis.displacementBias = 0;\n\n\tthis.alphaMap = null;\n\n\tthis.skinning = false;\n\tthis.morphTargets = false;\n\tthis.morphNormals = false;\n\n\tthis.setValues( parameters );\n\n}\n\nMeshMatcapMaterial.prototype = Object.create( Material.prototype );\nMeshMatcapMaterial.prototype.constructor = MeshMatcapMaterial;\n\nMeshMatcapMaterial.prototype.isMeshMatcapMaterial = true;\n\nMeshMatcapMaterial.prototype.copy = function ( source ) {\n\n\tMaterial.prototype.copy.call( this, source );\n\n\tthis.defines = { 'MATCAP': '' };\n\n\tthis.color.copy( source.color );\n\n\tthis.matcap = source.matcap;\n\n\tthis.map = source.map;\n\n\tthis.bumpMap = source.bumpMap;\n\tthis.bumpScale = source.bumpScale;\n\n\tthis.normalMap = source.normalMap;\n\tthis.normalMapType = source.normalMapType;\n\tthis.normalScale.copy( source.normalScale );\n\n\tthis.displacementMap = source.displacementMap;\n\tthis.displacementScale = source.displacementScale;\n\tthis.displacementBias = source.displacementBias;\n\n\tthis.alphaMap = source.alphaMap;\n\n\tthis.skinning = source.skinning;\n\tthis.morphTargets = source.morphTargets;\n\tthis.morphNormals = source.morphNormals;\n\n\treturn this;\n\n};\n\n/**\n * parameters = {\n *  color: <hex>,\n *  opacity: <float>,\n *\n *  linewidth: <float>,\n *\n *  scale: <float>,\n *  dashSize: <float>,\n *  gapSize: <float>\n * }\n */\n\nfunction LineDashedMaterial( parameters ) {\n\n\tLineBasicMaterial.call( this );\n\n\tthis.type = 'LineDashedMaterial';\n\n\tthis.scale = 1;\n\tthis.dashSize = 3;\n\tthis.gapSize = 1;\n\n\tthis.setValues( parameters );\n\n}\n\nLineDashedMaterial.prototype = Object.create( LineBasicMaterial.prototype );\nLineDashedMaterial.prototype.constructor = LineDashedMaterial;\n\nLineDashedMaterial.prototype.isLineDashedMaterial = true;\n\nLineDashedMaterial.prototype.copy = function ( source ) {\n\n\tLineBasicMaterial.prototype.copy.call( this, source );\n\n\tthis.scale = source.scale;\n\tthis.dashSize = source.dashSize;\n\tthis.gapSize = source.gapSize;\n\n\treturn this;\n\n};\n\nvar Materials = /*#__PURE__*/Object.freeze({\n\t__proto__: null,\n\tShadowMaterial: ShadowMaterial,\n\tSpriteMaterial: SpriteMaterial,\n\tRawShaderMaterial: RawShaderMaterial,\n\tShaderMaterial: ShaderMaterial,\n\tPointsMaterial: PointsMaterial,\n\tMeshPhysicalMaterial: MeshPhysicalMaterial,\n\tMeshStandardMaterial: MeshStandardMaterial,\n\tMeshPhongMaterial: MeshPhongMaterial,\n\tMeshToonMaterial: MeshToonMaterial,\n\tMeshNormalMaterial: MeshNormalMaterial,\n\tMeshLambertMaterial: MeshLambertMaterial,\n\tMeshDepthMaterial: MeshDepthMaterial,\n\tMeshDistanceMaterial: MeshDistanceMaterial,\n\tMeshBasicMaterial: MeshBasicMaterial,\n\tMeshMatcapMaterial: MeshMatcapMaterial,\n\tLineDashedMaterial: LineDashedMaterial,\n\tLineBasicMaterial: LineBasicMaterial,\n\tMaterial: Material\n});\n\nconst AnimationUtils = {\n\n\t// same as Array.prototype.slice, but also works on typed arrays\n\tarraySlice: function ( array, from, to ) {\n\n\t\tif ( AnimationUtils.isTypedArray( array ) ) {\n\n\t\t\t// in ios9 array.subarray(from, undefined) will return empty array\n\t\t\t// but array.subarray(from) or array.subarray(from, len) is correct\n\t\t\treturn new array.constructor( array.subarray( from, to !== undefined ? to : array.length ) );\n\n\t\t}\n\n\t\treturn array.slice( from, to );\n\n\t},\n\n\t// converts an array to a specific type\n\tconvertArray: function ( array, type, forceClone ) {\n\n\t\tif ( ! array || // let 'undefined' and 'null' pass\n\t\t\t! forceClone && array.constructor === type ) return array;\n\n\t\tif ( typeof type.BYTES_PER_ELEMENT === 'number' ) {\n\n\t\t\treturn new type( array ); // create typed array\n\n\t\t}\n\n\t\treturn Array.prototype.slice.call( array ); // create Array\n\n\t},\n\n\tisTypedArray: function ( object ) {\n\n\t\treturn ArrayBuffer.isView( object ) &&\n\t\t\t! ( object instanceof DataView );\n\n\t},\n\n\t// returns an array by which times and values can be sorted\n\tgetKeyframeOrder: function ( times ) {\n\n\t\tfunction compareTime( i, j ) {\n\n\t\t\treturn times[ i ] - times[ j ];\n\n\t\t}\n\n\t\tconst n = times.length;\n\t\tconst result = new Array( n );\n\t\tfor ( let i = 0; i !== n; ++ i ) result[ i ] = i;\n\n\t\tresult.sort( compareTime );\n\n\t\treturn result;\n\n\t},\n\n\t// uses the array previously returned by 'getKeyframeOrder' to sort data\n\tsortedArray: function ( values, stride, order ) {\n\n\t\tconst nValues = values.length;\n\t\tconst result = new values.constructor( nValues );\n\n\t\tfor ( let i = 0, dstOffset = 0; dstOffset !== nValues; ++ i ) {\n\n\t\t\tconst srcOffset = order[ i ] * stride;\n\n\t\t\tfor ( let j = 0; j !== stride; ++ j ) {\n\n\t\t\t\tresult[ dstOffset ++ ] = values[ srcOffset + j ];\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn result;\n\n\t},\n\n\t// function for parsing AOS keyframe formats\n\tflattenJSON: function ( jsonKeys, times, values, valuePropertyName ) {\n\n\t\tlet i = 1, key = jsonKeys[ 0 ];\n\n\t\twhile ( key !== undefined && key[ valuePropertyName ] === undefined ) {\n\n\t\t\tkey = jsonKeys[ i ++ ];\n\n\t\t}\n\n\t\tif ( key === undefined ) return; // no data\n\n\t\tlet value = key[ valuePropertyName ];\n\t\tif ( value === undefined ) return; // no data\n\n\t\tif ( Array.isArray( value ) ) {\n\n\t\t\tdo {\n\n\t\t\t\tvalue = key[ valuePropertyName ];\n\n\t\t\t\tif ( value !== undefined ) {\n\n\t\t\t\t\ttimes.push( key.time );\n\t\t\t\t\tvalues.push.apply( values, value ); // push all elements\n\n\t\t\t\t}\n\n\t\t\t\tkey = jsonKeys[ i ++ ];\n\n\t\t\t} while ( key !== undefined );\n\n\t\t} else if ( value.toArray !== undefined ) {\n\n\t\t\t// ...assume THREE.Math-ish\n\n\t\t\tdo {\n\n\t\t\t\tvalue = key[ valuePropertyName ];\n\n\t\t\t\tif ( value !== undefined ) {\n\n\t\t\t\t\ttimes.push( key.time );\n\t\t\t\t\tvalue.toArray( values, values.length );\n\n\t\t\t\t}\n\n\t\t\t\tkey = jsonKeys[ i ++ ];\n\n\t\t\t} while ( key !== undefined );\n\n\t\t} else {\n\n\t\t\t// otherwise push as-is\n\n\t\t\tdo {\n\n\t\t\t\tvalue = key[ valuePropertyName ];\n\n\t\t\t\tif ( value !== undefined ) {\n\n\t\t\t\t\ttimes.push( key.time );\n\t\t\t\t\tvalues.push( value );\n\n\t\t\t\t}\n\n\t\t\t\tkey = jsonKeys[ i ++ ];\n\n\t\t\t} while ( key !== undefined );\n\n\t\t}\n\n\t},\n\n\tsubclip: function ( sourceClip, name, startFrame, endFrame, fps = 30 ) {\n\n\t\tconst clip = sourceClip.clone();\n\n\t\tclip.name = name;\n\n\t\tconst tracks = [];\n\n\t\tfor ( let i = 0; i < clip.tracks.length; ++ i ) {\n\n\t\t\tconst track = clip.tracks[ i ];\n\t\t\tconst valueSize = track.getValueSize();\n\n\t\t\tconst times = [];\n\t\t\tconst values = [];\n\n\t\t\tfor ( let j = 0; j < track.times.length; ++ j ) {\n\n\t\t\t\tconst frame = track.times[ j ] * fps;\n\n\t\t\t\tif ( frame < startFrame || frame >= endFrame ) continue;\n\n\t\t\t\ttimes.push( track.times[ j ] );\n\n\t\t\t\tfor ( let k = 0; k < valueSize; ++ k ) {\n\n\t\t\t\t\tvalues.push( track.values[ j * valueSize + k ] );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tif ( times.length === 0 ) continue;\n\n\t\t\ttrack.times = AnimationUtils.convertArray( times, track.times.constructor );\n\t\t\ttrack.values = AnimationUtils.convertArray( values, track.values.constructor );\n\n\t\t\ttracks.push( track );\n\n\t\t}\n\n\t\tclip.tracks = tracks;\n\n\t\t// find minimum .times value across all tracks in the trimmed clip\n\n\t\tlet minStartTime = Infinity;\n\n\t\tfor ( let i = 0; i < clip.tracks.length; ++ i ) {\n\n\t\t\tif ( minStartTime > clip.tracks[ i ].times[ 0 ] ) {\n\n\t\t\t\tminStartTime = clip.tracks[ i ].times[ 0 ];\n\n\t\t\t}\n\n\t\t}\n\n\t\t// shift all tracks such that clip begins at t=0\n\n\t\tfor ( let i = 0; i < clip.tracks.length; ++ i ) {\n\n\t\t\tclip.tracks[ i ].shift( - 1 * minStartTime );\n\n\t\t}\n\n\t\tclip.resetDuration();\n\n\t\treturn clip;\n\n\t},\n\n\tmakeClipAdditive: function ( targetClip, referenceFrame = 0, referenceClip = targetClip, fps = 30 ) {\n\n\t\tif ( fps <= 0 ) fps = 30;\n\n\t\tconst numTracks = referenceClip.tracks.length;\n\t\tconst referenceTime = referenceFrame / fps;\n\n\t\t// Make each track's values relative to the values at the reference frame\n\t\tfor ( let i = 0; i < numTracks; ++ i ) {\n\n\t\t\tconst referenceTrack = referenceClip.tracks[ i ];\n\t\t\tconst referenceTrackType = referenceTrack.ValueTypeName;\n\n\t\t\t// Skip this track if it's non-numeric\n\t\t\tif ( referenceTrackType === 'bool' || referenceTrackType === 'string' ) continue;\n\n\t\t\t// Find the track in the target clip whose name and type matches the reference track\n\t\t\tconst targetTrack = targetClip.tracks.find( function ( track ) {\n\n\t\t\t\treturn track.name === referenceTrack.name\n\t\t\t\t\t&& track.ValueTypeName === referenceTrackType;\n\n\t\t\t} );\n\n\t\t\tif ( targetTrack === undefined ) continue;\n\n\t\t\tlet referenceOffset = 0;\n\t\t\tconst referenceValueSize = referenceTrack.getValueSize();\n\n\t\t\tif ( referenceTrack.createInterpolant.isInterpolantFactoryMethodGLTFCubicSpline ) {\n\n\t\t\t\treferenceOffset = referenceValueSize / 3;\n\n\t\t\t}\n\n\t\t\tlet targetOffset = 0;\n\t\t\tconst targetValueSize = targetTrack.getValueSize();\n\n\t\t\tif ( targetTrack.createInterpolant.isInterpolantFactoryMethodGLTFCubicSpline ) {\n\n\t\t\t\ttargetOffset = targetValueSize / 3;\n\n\t\t\t}\n\n\t\t\tconst lastIndex = referenceTrack.times.length - 1;\n\t\t\tlet referenceValue;\n\n\t\t\t// Find the value to subtract out of the track\n\t\t\tif ( referenceTime <= referenceTrack.times[ 0 ] ) {\n\n\t\t\t\t// Reference frame is earlier than the first keyframe, so just use the first keyframe\n\t\t\t\tconst startIndex = referenceOffset;\n\t\t\t\tconst endIndex = referenceValueSize - referenceOffset;\n\t\t\t\treferenceValue = AnimationUtils.arraySlice( referenceTrack.values, startIndex, endIndex );\n\n\t\t\t} else if ( referenceTime >= referenceTrack.times[ lastIndex ] ) {\n\n\t\t\t\t// Reference frame is after the last keyframe, so just use the last keyframe\n\t\t\t\tconst startIndex = lastIndex * referenceValueSize + referenceOffset;\n\t\t\t\tconst endIndex = startIndex + referenceValueSize - referenceOffset;\n\t\t\t\treferenceValue = AnimationUtils.arraySlice( referenceTrack.values, startIndex, endIndex );\n\n\t\t\t} else {\n\n\t\t\t\t// Interpolate to the reference value\n\t\t\t\tconst interpolant = referenceTrack.createInterpolant();\n\t\t\t\tconst startIndex = referenceOffset;\n\t\t\t\tconst endIndex = referenceValueSize - referenceOffset;\n\t\t\t\tinterpolant.evaluate( referenceTime );\n\t\t\t\treferenceValue = AnimationUtils.arraySlice( interpolant.resultBuffer, startIndex, endIndex );\n\n\t\t\t}\n\n\t\t\t// Conjugate the quaternion\n\t\t\tif ( referenceTrackType === 'quaternion' ) {\n\n\t\t\t\tconst referenceQuat = new Quaternion().fromArray( referenceValue ).normalize().conjugate();\n\t\t\t\treferenceQuat.toArray( referenceValue );\n\n\t\t\t}\n\n\t\t\t// Subtract the reference value from all of the track values\n\n\t\t\tconst numTimes = targetTrack.times.length;\n\t\t\tfor ( let j = 0; j < numTimes; ++ j ) {\n\n\t\t\t\tconst valueStart = j * targetValueSize + targetOffset;\n\n\t\t\t\tif ( referenceTrackType === 'quaternion' ) {\n\n\t\t\t\t\t// Multiply the conjugate for quaternion track types\n\t\t\t\t\tQuaternion.multiplyQuaternionsFlat(\n\t\t\t\t\t\ttargetTrack.values,\n\t\t\t\t\t\tvalueStart,\n\t\t\t\t\t\treferenceValue,\n\t\t\t\t\t\t0,\n\t\t\t\t\t\ttargetTrack.values,\n\t\t\t\t\t\tvalueStart\n\t\t\t\t\t);\n\n\t\t\t\t} else {\n\n\t\t\t\t\tconst valueEnd = targetValueSize - targetOffset * 2;\n\n\t\t\t\t\t// Subtract each value for all other numeric track types\n\t\t\t\t\tfor ( let k = 0; k < valueEnd; ++ k ) {\n\n\t\t\t\t\t\ttargetTrack.values[ valueStart + k ] -= referenceValue[ k ];\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\ttargetClip.blendMode = AdditiveAnimationBlendMode;\n\n\t\treturn targetClip;\n\n\t}\n\n};\n\n/**\n * Abstract base class of interpolants over parametric samples.\n *\n * The parameter domain is one dimensional, typically the time or a path\n * along a curve defined by the data.\n *\n * The sample values can have any dimensionality and derived classes may\n * apply special interpretations to the data.\n *\n * This class provides the interval seek in a Template Method, deferring\n * the actual interpolation to derived classes.\n *\n * Time complexity is O(1) for linear access crossing at most two points\n * and O(log N) for random access, where N is the number of positions.\n *\n * References:\n *\n * \t\thttp://www.oodesign.com/template-method-pattern.html\n *\n */\n\nfunction Interpolant( parameterPositions, sampleValues, sampleSize, resultBuffer ) {\n\n\tthis.parameterPositions = parameterPositions;\n\tthis._cachedIndex = 0;\n\n\tthis.resultBuffer = resultBuffer !== undefined ?\n\t\tresultBuffer : new sampleValues.constructor( sampleSize );\n\tthis.sampleValues = sampleValues;\n\tthis.valueSize = sampleSize;\n\n}\n\nObject.assign( Interpolant.prototype, {\n\n\tevaluate: function ( t ) {\n\n\t\tconst pp = this.parameterPositions;\n\t\tlet i1 = this._cachedIndex,\n\t\t\tt1 = pp[ i1 ],\n\t\t\tt0 = pp[ i1 - 1 ];\n\n\t\tvalidate_interval: {\n\n\t\t\tseek: {\n\n\t\t\t\tlet right;\n\n\t\t\t\tlinear_scan: {\n\n\t\t\t\t\t//- See http://jsperf.com/comparison-to-undefined/3\n\t\t\t\t\t//- slower code:\n\t\t\t\t\t//-\n\t\t\t\t\t//- \t\t\t\tif ( t >= t1 || t1 === undefined ) {\n\t\t\t\t\tforward_scan: if ( ! ( t < t1 ) ) {\n\n\t\t\t\t\t\tfor ( let giveUpAt = i1 + 2; ; ) {\n\n\t\t\t\t\t\t\tif ( t1 === undefined ) {\n\n\t\t\t\t\t\t\t\tif ( t < t0 ) break forward_scan;\n\n\t\t\t\t\t\t\t\t// after end\n\n\t\t\t\t\t\t\t\ti1 = pp.length;\n\t\t\t\t\t\t\t\tthis._cachedIndex = i1;\n\t\t\t\t\t\t\t\treturn this.afterEnd_( i1 - 1, t, t0 );\n\n\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t\tif ( i1 === giveUpAt ) break; // this loop\n\n\t\t\t\t\t\t\tt0 = t1;\n\t\t\t\t\t\t\tt1 = pp[ ++ i1 ];\n\n\t\t\t\t\t\t\tif ( t < t1 ) {\n\n\t\t\t\t\t\t\t\t// we have arrived at the sought interval\n\t\t\t\t\t\t\t\tbreak seek;\n\n\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\t// prepare binary search on the right side of the index\n\t\t\t\t\t\tright = pp.length;\n\t\t\t\t\t\tbreak linear_scan;\n\n\t\t\t\t\t}\n\n\t\t\t\t\t//- slower code:\n\t\t\t\t\t//-\t\t\t\t\tif ( t < t0 || t0 === undefined ) {\n\t\t\t\t\tif ( ! ( t >= t0 ) ) {\n\n\t\t\t\t\t\t// looping?\n\n\t\t\t\t\t\tconst t1global = pp[ 1 ];\n\n\t\t\t\t\t\tif ( t < t1global ) {\n\n\t\t\t\t\t\t\ti1 = 2; // + 1, using the scan for the details\n\t\t\t\t\t\t\tt0 = t1global;\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\t// linear reverse scan\n\n\t\t\t\t\t\tfor ( let giveUpAt = i1 - 2; ; ) {\n\n\t\t\t\t\t\t\tif ( t0 === undefined ) {\n\n\t\t\t\t\t\t\t\t// before start\n\n\t\t\t\t\t\t\t\tthis._cachedIndex = 0;\n\t\t\t\t\t\t\t\treturn this.beforeStart_( 0, t, t1 );\n\n\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t\tif ( i1 === giveUpAt ) break; // this loop\n\n\t\t\t\t\t\t\tt1 = t0;\n\t\t\t\t\t\t\tt0 = pp[ -- i1 - 1 ];\n\n\t\t\t\t\t\t\tif ( t >= t0 ) {\n\n\t\t\t\t\t\t\t\t// we have arrived at the sought interval\n\t\t\t\t\t\t\t\tbreak seek;\n\n\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\t// prepare binary search on the left side of the index\n\t\t\t\t\t\tright = i1;\n\t\t\t\t\t\ti1 = 0;\n\t\t\t\t\t\tbreak linear_scan;\n\n\t\t\t\t\t}\n\n\t\t\t\t\t// the interval is valid\n\n\t\t\t\t\tbreak validate_interval;\n\n\t\t\t\t} // linear scan\n\n\t\t\t\t// binary search\n\n\t\t\t\twhile ( i1 < right ) {\n\n\t\t\t\t\tconst mid = ( i1 + right ) >>> 1;\n\n\t\t\t\t\tif ( t < pp[ mid ] ) {\n\n\t\t\t\t\t\tright = mid;\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\ti1 = mid + 1;\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\tt1 = pp[ i1 ];\n\t\t\t\tt0 = pp[ i1 - 1 ];\n\n\t\t\t\t// check boundary cases, again\n\n\t\t\t\tif ( t0 === undefined ) {\n\n\t\t\t\t\tthis._cachedIndex = 0;\n\t\t\t\t\treturn this.beforeStart_( 0, t, t1 );\n\n\t\t\t\t}\n\n\t\t\t\tif ( t1 === undefined ) {\n\n\t\t\t\t\ti1 = pp.length;\n\t\t\t\t\tthis._cachedIndex = i1;\n\t\t\t\t\treturn this.afterEnd_( i1 - 1, t0, t );\n\n\t\t\t\t}\n\n\t\t\t} // seek\n\n\t\t\tthis._cachedIndex = i1;\n\n\t\t\tthis.intervalChanged_( i1, t0, t1 );\n\n\t\t} // validate_interval\n\n\t\treturn this.interpolate_( i1, t0, t, t1 );\n\n\t},\n\n\tsettings: null, // optional, subclass-specific settings structure\n\t// Note: The indirection allows central control of many interpolants.\n\n\t// --- Protected interface\n\n\tDefaultSettings_: {},\n\n\tgetSettings_: function () {\n\n\t\treturn this.settings || this.DefaultSettings_;\n\n\t},\n\n\tcopySampleValue_: function ( index ) {\n\n\t\t// copies a sample value to the result buffer\n\n\t\tconst result = this.resultBuffer,\n\t\t\tvalues = this.sampleValues,\n\t\t\tstride = this.valueSize,\n\t\t\toffset = index * stride;\n\n\t\tfor ( let i = 0; i !== stride; ++ i ) {\n\n\t\t\tresult[ i ] = values[ offset + i ];\n\n\t\t}\n\n\t\treturn result;\n\n\t},\n\n\t// Template methods for derived classes:\n\n\tinterpolate_: function ( /* i1, t0, t, t1 */ ) {\n\n\t\tthrow new Error( 'call to abstract method' );\n\t\t// implementations shall return this.resultBuffer\n\n\t},\n\n\tintervalChanged_: function ( /* i1, t0, t1 */ ) {\n\n\t\t// empty\n\n\t}\n\n} );\n\n// DECLARE ALIAS AFTER assign prototype\nObject.assign( Interpolant.prototype, {\n\n\t//( 0, t, t0 ), returns this.resultBuffer\n\tbeforeStart_: Interpolant.prototype.copySampleValue_,\n\n\t//( N-1, tN-1, t ), returns this.resultBuffer\n\tafterEnd_: Interpolant.prototype.copySampleValue_,\n\n} );\n\n/**\n * Fast and simple cubic spline interpolant.\n *\n * It was derived from a Hermitian construction setting the first derivative\n * at each sample position to the linear slope between neighboring positions\n * over their parameter interval.\n */\n\nfunction CubicInterpolant( parameterPositions, sampleValues, sampleSize, resultBuffer ) {\n\n\tInterpolant.call( this, parameterPositions, sampleValues, sampleSize, resultBuffer );\n\n\tthis._weightPrev = - 0;\n\tthis._offsetPrev = - 0;\n\tthis._weightNext = - 0;\n\tthis._offsetNext = - 0;\n\n}\n\nCubicInterpolant.prototype = Object.assign( Object.create( Interpolant.prototype ), {\n\n\tconstructor: CubicInterpolant,\n\n\tDefaultSettings_: {\n\n\t\tendingStart: ZeroCurvatureEnding,\n\t\tendingEnd: ZeroCurvatureEnding\n\n\t},\n\n\tintervalChanged_: function ( i1, t0, t1 ) {\n\n\t\tconst pp = this.parameterPositions;\n\t\tlet iPrev = i1 - 2,\n\t\t\tiNext = i1 + 1,\n\n\t\t\ttPrev = pp[ iPrev ],\n\t\t\ttNext = pp[ iNext ];\n\n\t\tif ( tPrev === undefined ) {\n\n\t\t\tswitch ( this.getSettings_().endingStart ) {\n\n\t\t\t\tcase ZeroSlopeEnding:\n\n\t\t\t\t\t// f'(t0) = 0\n\t\t\t\t\tiPrev = i1;\n\t\t\t\t\ttPrev = 2 * t0 - t1;\n\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase WrapAroundEnding:\n\n\t\t\t\t\t// use the other end of the curve\n\t\t\t\t\tiPrev = pp.length - 2;\n\t\t\t\t\ttPrev = t0 + pp[ iPrev ] - pp[ iPrev + 1 ];\n\n\t\t\t\t\tbreak;\n\n\t\t\t\tdefault: // ZeroCurvatureEnding\n\n\t\t\t\t\t// f''(t0) = 0 a.k.a. Natural Spline\n\t\t\t\t\tiPrev = i1;\n\t\t\t\t\ttPrev = t1;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( tNext === undefined ) {\n\n\t\t\tswitch ( this.getSettings_().endingEnd ) {\n\n\t\t\t\tcase ZeroSlopeEnding:\n\n\t\t\t\t\t// f'(tN) = 0\n\t\t\t\t\tiNext = i1;\n\t\t\t\t\ttNext = 2 * t1 - t0;\n\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase WrapAroundEnding:\n\n\t\t\t\t\t// use the other end of the curve\n\t\t\t\t\tiNext = 1;\n\t\t\t\t\ttNext = t1 + pp[ 1 ] - pp[ 0 ];\n\n\t\t\t\t\tbreak;\n\n\t\t\t\tdefault: // ZeroCurvatureEnding\n\n\t\t\t\t\t// f''(tN) = 0, a.k.a. Natural Spline\n\t\t\t\t\tiNext = i1 - 1;\n\t\t\t\t\ttNext = t0;\n\n\t\t\t}\n\n\t\t}\n\n\t\tconst halfDt = ( t1 - t0 ) * 0.5,\n\t\t\tstride = this.valueSize;\n\n\t\tthis._weightPrev = halfDt / ( t0 - tPrev );\n\t\tthis._weightNext = halfDt / ( tNext - t1 );\n\t\tthis._offsetPrev = iPrev * stride;\n\t\tthis._offsetNext = iNext * stride;\n\n\t},\n\n\tinterpolate_: function ( i1, t0, t, t1 ) {\n\n\t\tconst result = this.resultBuffer,\n\t\t\tvalues = this.sampleValues,\n\t\t\tstride = this.valueSize,\n\n\t\t\to1 = i1 * stride,\t\to0 = o1 - stride,\n\t\t\toP = this._offsetPrev, \toN = this._offsetNext,\n\t\t\twP = this._weightPrev,\twN = this._weightNext,\n\n\t\t\tp = ( t - t0 ) / ( t1 - t0 ),\n\t\t\tpp = p * p,\n\t\t\tppp = pp * p;\n\n\t\t// evaluate polynomials\n\n\t\tconst sP = - wP * ppp + 2 * wP * pp - wP * p;\n\t\tconst s0 = ( 1 + wP ) * ppp + ( - 1.5 - 2 * wP ) * pp + ( - 0.5 + wP ) * p + 1;\n\t\tconst s1 = ( - 1 - wN ) * ppp + ( 1.5 + wN ) * pp + 0.5 * p;\n\t\tconst sN = wN * ppp - wN * pp;\n\n\t\t// combine data linearly\n\n\t\tfor ( let i = 0; i !== stride; ++ i ) {\n\n\t\t\tresult[ i ] =\n\t\t\t\t\tsP * values[ oP + i ] +\n\t\t\t\t\ts0 * values[ o0 + i ] +\n\t\t\t\t\ts1 * values[ o1 + i ] +\n\t\t\t\t\tsN * values[ oN + i ];\n\n\t\t}\n\n\t\treturn result;\n\n\t}\n\n} );\n\nfunction LinearInterpolant( parameterPositions, sampleValues, sampleSize, resultBuffer ) {\n\n\tInterpolant.call( this, parameterPositions, sampleValues, sampleSize, resultBuffer );\n\n}\n\nLinearInterpolant.prototype = Object.assign( Object.create( Interpolant.prototype ), {\n\n\tconstructor: LinearInterpolant,\n\n\tinterpolate_: function ( i1, t0, t, t1 ) {\n\n\t\tconst result = this.resultBuffer,\n\t\t\tvalues = this.sampleValues,\n\t\t\tstride = this.valueSize,\n\n\t\t\toffset1 = i1 * stride,\n\t\t\toffset0 = offset1 - stride,\n\n\t\t\tweight1 = ( t - t0 ) / ( t1 - t0 ),\n\t\t\tweight0 = 1 - weight1;\n\n\t\tfor ( let i = 0; i !== stride; ++ i ) {\n\n\t\t\tresult[ i ] =\n\t\t\t\t\tvalues[ offset0 + i ] * weight0 +\n\t\t\t\t\tvalues[ offset1 + i ] * weight1;\n\n\t\t}\n\n\t\treturn result;\n\n\t}\n\n} );\n\n/**\n *\n * Interpolant that evaluates to the sample value at the position preceeding\n * the parameter.\n */\n\nfunction DiscreteInterpolant( parameterPositions, sampleValues, sampleSize, resultBuffer ) {\n\n\tInterpolant.call( this, parameterPositions, sampleValues, sampleSize, resultBuffer );\n\n}\n\nDiscreteInterpolant.prototype = Object.assign( Object.create( Interpolant.prototype ), {\n\n\tconstructor: DiscreteInterpolant,\n\n\tinterpolate_: function ( i1 /*, t0, t, t1 */ ) {\n\n\t\treturn this.copySampleValue_( i1 - 1 );\n\n\t}\n\n} );\n\nfunction KeyframeTrack( name, times, values, interpolation ) {\n\n\tif ( name === undefined ) throw new Error( 'THREE.KeyframeTrack: track name is undefined' );\n\tif ( times === undefined || times.length === 0 ) throw new Error( 'THREE.KeyframeTrack: no keyframes in track named ' + name );\n\n\tthis.name = name;\n\n\tthis.times = AnimationUtils.convertArray( times, this.TimeBufferType );\n\tthis.values = AnimationUtils.convertArray( values, this.ValueBufferType );\n\n\tthis.setInterpolation( interpolation || this.DefaultInterpolation );\n\n}\n\n// Static methods\n\nObject.assign( KeyframeTrack, {\n\n\t// Serialization (in static context, because of constructor invocation\n\t// and automatic invocation of .toJSON):\n\n\ttoJSON: function ( track ) {\n\n\t\tconst trackType = track.constructor;\n\n\t\tlet json;\n\n\t\t// derived classes can define a static toJSON method\n\t\tif ( trackType.toJSON !== undefined ) {\n\n\t\t\tjson = trackType.toJSON( track );\n\n\t\t} else {\n\n\t\t\t// by default, we assume the data can be serialized as-is\n\t\t\tjson = {\n\n\t\t\t\t'name': track.name,\n\t\t\t\t'times': AnimationUtils.convertArray( track.times, Array ),\n\t\t\t\t'values': AnimationUtils.convertArray( track.values, Array )\n\n\t\t\t};\n\n\t\t\tconst interpolation = track.getInterpolation();\n\n\t\t\tif ( interpolation !== track.DefaultInterpolation ) {\n\n\t\t\t\tjson.interpolation = interpolation;\n\n\t\t\t}\n\n\t\t}\n\n\t\tjson.type = track.ValueTypeName; // mandatory\n\n\t\treturn json;\n\n\t}\n\n} );\n\nObject.assign( KeyframeTrack.prototype, {\n\n\tconstructor: KeyframeTrack,\n\n\tTimeBufferType: Float32Array,\n\n\tValueBufferType: Float32Array,\n\n\tDefaultInterpolation: InterpolateLinear,\n\n\tInterpolantFactoryMethodDiscrete: function ( result ) {\n\n\t\treturn new DiscreteInterpolant( this.times, this.values, this.getValueSize(), result );\n\n\t},\n\n\tInterpolantFactoryMethodLinear: function ( result ) {\n\n\t\treturn new LinearInterpolant( this.times, this.values, this.getValueSize(), result );\n\n\t},\n\n\tInterpolantFactoryMethodSmooth: function ( result ) {\n\n\t\treturn new CubicInterpolant( this.times, this.values, this.getValueSize(), result );\n\n\t},\n\n\tsetInterpolation: function ( interpolation ) {\n\n\t\tlet factoryMethod;\n\n\t\tswitch ( interpolation ) {\n\n\t\t\tcase InterpolateDiscrete:\n\n\t\t\t\tfactoryMethod = this.InterpolantFactoryMethodDiscrete;\n\n\t\t\t\tbreak;\n\n\t\t\tcase InterpolateLinear:\n\n\t\t\t\tfactoryMethod = this.InterpolantFactoryMethodLinear;\n\n\t\t\t\tbreak;\n\n\t\t\tcase InterpolateSmooth:\n\n\t\t\t\tfactoryMethod = this.InterpolantFactoryMethodSmooth;\n\n\t\t\t\tbreak;\n\n\t\t}\n\n\t\tif ( factoryMethod === undefined ) {\n\n\t\t\tconst message = 'unsupported interpolation for ' +\n\t\t\t\tthis.ValueTypeName + ' keyframe track named ' + this.name;\n\n\t\t\tif ( this.createInterpolant === undefined ) {\n\n\t\t\t\t// fall back to default, unless the default itself is messed up\n\t\t\t\tif ( interpolation !== this.DefaultInterpolation ) {\n\n\t\t\t\t\tthis.setInterpolation( this.DefaultInterpolation );\n\n\t\t\t\t} else {\n\n\t\t\t\t\tthrow new Error( message ); // fatal, in this case\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tconsole.warn( 'THREE.KeyframeTrack:', message );\n\t\t\treturn this;\n\n\t\t}\n\n\t\tthis.createInterpolant = factoryMethod;\n\n\t\treturn this;\n\n\t},\n\n\tgetInterpolation: function () {\n\n\t\tswitch ( this.createInterpolant ) {\n\n\t\t\tcase this.InterpolantFactoryMethodDiscrete:\n\n\t\t\t\treturn InterpolateDiscrete;\n\n\t\t\tcase this.InterpolantFactoryMethodLinear:\n\n\t\t\t\treturn InterpolateLinear;\n\n\t\t\tcase this.InterpolantFactoryMethodSmooth:\n\n\t\t\t\treturn InterpolateSmooth;\n\n\t\t}\n\n\t},\n\n\tgetValueSize: function () {\n\n\t\treturn this.values.length / this.times.length;\n\n\t},\n\n\t// move all keyframes either forwards or backwards in time\n\tshift: function ( timeOffset ) {\n\n\t\tif ( timeOffset !== 0.0 ) {\n\n\t\t\tconst times = this.times;\n\n\t\t\tfor ( let i = 0, n = times.length; i !== n; ++ i ) {\n\n\t\t\t\ttimes[ i ] += timeOffset;\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\t// scale all keyframe times by a factor (useful for frame <-> seconds conversions)\n\tscale: function ( timeScale ) {\n\n\t\tif ( timeScale !== 1.0 ) {\n\n\t\t\tconst times = this.times;\n\n\t\t\tfor ( let i = 0, n = times.length; i !== n; ++ i ) {\n\n\t\t\t\ttimes[ i ] *= timeScale;\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\t// removes keyframes before and after animation without changing any values within the range [startTime, endTime].\n\t// IMPORTANT: We do not shift around keys to the start of the track time, because for interpolated keys this will change their values\n\ttrim: function ( startTime, endTime ) {\n\n\t\tconst times = this.times,\n\t\t\tnKeys = times.length;\n\n\t\tlet from = 0,\n\t\t\tto = nKeys - 1;\n\n\t\twhile ( from !== nKeys && times[ from ] < startTime ) {\n\n\t\t\t++ from;\n\n\t\t}\n\n\t\twhile ( to !== - 1 && times[ to ] > endTime ) {\n\n\t\t\t-- to;\n\n\t\t}\n\n\t\t++ to; // inclusive -> exclusive bound\n\n\t\tif ( from !== 0 || to !== nKeys ) {\n\n\t\t\t// empty tracks are forbidden, so keep at least one keyframe\n\t\t\tif ( from >= to ) {\n\n\t\t\t\tto = Math.max( to, 1 );\n\t\t\t\tfrom = to - 1;\n\n\t\t\t}\n\n\t\t\tconst stride = this.getValueSize();\n\t\t\tthis.times = AnimationUtils.arraySlice( times, from, to );\n\t\t\tthis.values = AnimationUtils.arraySlice( this.values, from * stride, to * stride );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\t// ensure we do not get a GarbageInGarbageOut situation, make sure tracks are at least minimally viable\n\tvalidate: function () {\n\n\t\tlet valid = true;\n\n\t\tconst valueSize = this.getValueSize();\n\t\tif ( valueSize - Math.floor( valueSize ) !== 0 ) {\n\n\t\t\tconsole.error( 'THREE.KeyframeTrack: Invalid value size in track.', this );\n\t\t\tvalid = false;\n\n\t\t}\n\n\t\tconst times = this.times,\n\t\t\tvalues = this.values,\n\n\t\t\tnKeys = times.length;\n\n\t\tif ( nKeys === 0 ) {\n\n\t\t\tconsole.error( 'THREE.KeyframeTrack: Track is empty.', this );\n\t\t\tvalid = false;\n\n\t\t}\n\n\t\tlet prevTime = null;\n\n\t\tfor ( let i = 0; i !== nKeys; i ++ ) {\n\n\t\t\tconst currTime = times[ i ];\n\n\t\t\tif ( typeof currTime === 'number' && isNaN( currTime ) ) {\n\n\t\t\t\tconsole.error( 'THREE.KeyframeTrack: Time is not a valid number.', this, i, currTime );\n\t\t\t\tvalid = false;\n\t\t\t\tbreak;\n\n\t\t\t}\n\n\t\t\tif ( prevTime !== null && prevTime > currTime ) {\n\n\t\t\t\tconsole.error( 'THREE.KeyframeTrack: Out of order keys.', this, i, currTime, prevTime );\n\t\t\t\tvalid = false;\n\t\t\t\tbreak;\n\n\t\t\t}\n\n\t\t\tprevTime = currTime;\n\n\t\t}\n\n\t\tif ( values !== undefined ) {\n\n\t\t\tif ( AnimationUtils.isTypedArray( values ) ) {\n\n\t\t\t\tfor ( let i = 0, n = values.length; i !== n; ++ i ) {\n\n\t\t\t\t\tconst value = values[ i ];\n\n\t\t\t\t\tif ( isNaN( value ) ) {\n\n\t\t\t\t\t\tconsole.error( 'THREE.KeyframeTrack: Value is not a valid number.', this, i, value );\n\t\t\t\t\t\tvalid = false;\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn valid;\n\n\t},\n\n\t// removes equivalent sequential keys as common in morph target sequences\n\t// (0,0,0,0,1,1,1,0,0,0,0,0,0,0) --> (0,0,1,1,0,0)\n\toptimize: function () {\n\n\t\t// times or values may be shared with other tracks, so overwriting is unsafe\n\t\tconst times = AnimationUtils.arraySlice( this.times ),\n\t\t\tvalues = AnimationUtils.arraySlice( this.values ),\n\t\t\tstride = this.getValueSize(),\n\n\t\t\tsmoothInterpolation = this.getInterpolation() === InterpolateSmooth,\n\n\t\t\tlastIndex = times.length - 1;\n\n\t\tlet writeIndex = 1;\n\n\t\tfor ( let i = 1; i < lastIndex; ++ i ) {\n\n\t\t\tlet keep = false;\n\n\t\t\tconst time = times[ i ];\n\t\t\tconst timeNext = times[ i + 1 ];\n\n\t\t\t// remove adjacent keyframes scheduled at the same time\n\n\t\t\tif ( time !== timeNext && ( i !== 1 || time !== times[ 0 ] ) ) {\n\n\t\t\t\tif ( ! smoothInterpolation ) {\n\n\t\t\t\t\t// remove unnecessary keyframes same as their neighbors\n\n\t\t\t\t\tconst offset = i * stride,\n\t\t\t\t\t\toffsetP = offset - stride,\n\t\t\t\t\t\toffsetN = offset + stride;\n\n\t\t\t\t\tfor ( let j = 0; j !== stride; ++ j ) {\n\n\t\t\t\t\t\tconst value = values[ offset + j ];\n\n\t\t\t\t\t\tif ( value !== values[ offsetP + j ] ||\n\t\t\t\t\t\t\tvalue !== values[ offsetN + j ] ) {\n\n\t\t\t\t\t\t\tkeep = true;\n\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t} else {\n\n\t\t\t\t\tkeep = true;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\t// in-place compaction\n\n\t\t\tif ( keep ) {\n\n\t\t\t\tif ( i !== writeIndex ) {\n\n\t\t\t\t\ttimes[ writeIndex ] = times[ i ];\n\n\t\t\t\t\tconst readOffset = i * stride,\n\t\t\t\t\t\twriteOffset = writeIndex * stride;\n\n\t\t\t\t\tfor ( let j = 0; j !== stride; ++ j ) {\n\n\t\t\t\t\t\tvalues[ writeOffset + j ] = values[ readOffset + j ];\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\t++ writeIndex;\n\n\t\t\t}\n\n\t\t}\n\n\t\t// flush last keyframe (compaction looks ahead)\n\n\t\tif ( lastIndex > 0 ) {\n\n\t\t\ttimes[ writeIndex ] = times[ lastIndex ];\n\n\t\t\tfor ( let readOffset = lastIndex * stride, writeOffset = writeIndex * stride, j = 0; j !== stride; ++ j ) {\n\n\t\t\t\tvalues[ writeOffset + j ] = values[ readOffset + j ];\n\n\t\t\t}\n\n\t\t\t++ writeIndex;\n\n\t\t}\n\n\t\tif ( writeIndex !== times.length ) {\n\n\t\t\tthis.times = AnimationUtils.arraySlice( times, 0, writeIndex );\n\t\t\tthis.values = AnimationUtils.arraySlice( values, 0, writeIndex * stride );\n\n\t\t} else {\n\n\t\t\tthis.times = times;\n\t\t\tthis.values = values;\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tclone: function () {\n\n\t\tconst times = AnimationUtils.arraySlice( this.times, 0 );\n\t\tconst values = AnimationUtils.arraySlice( this.values, 0 );\n\n\t\tconst TypedKeyframeTrack = this.constructor;\n\t\tconst track = new TypedKeyframeTrack( this.name, times, values );\n\n\t\t// Interpolant argument to constructor is not saved, so copy the factory method directly.\n\t\ttrack.createInterpolant = this.createInterpolant;\n\n\t\treturn track;\n\n\t}\n\n} );\n\n/**\n * A Track of Boolean keyframe values.\n */\n\nfunction BooleanKeyframeTrack( name, times, values ) {\n\n\tKeyframeTrack.call( this, name, times, values );\n\n}\n\nBooleanKeyframeTrack.prototype = Object.assign( Object.create( KeyframeTrack.prototype ), {\n\n\tconstructor: BooleanKeyframeTrack,\n\n\tValueTypeName: 'bool',\n\tValueBufferType: Array,\n\n\tDefaultInterpolation: InterpolateDiscrete,\n\n\tInterpolantFactoryMethodLinear: undefined,\n\tInterpolantFactoryMethodSmooth: undefined\n\n\t// Note: Actually this track could have a optimized / compressed\n\t// representation of a single value and a custom interpolant that\n\t// computes \"firstValue ^ isOdd( index )\".\n\n} );\n\n/**\n * A Track of keyframe values that represent color.\n */\n\nfunction ColorKeyframeTrack( name, times, values, interpolation ) {\n\n\tKeyframeTrack.call( this, name, times, values, interpolation );\n\n}\n\nColorKeyframeTrack.prototype = Object.assign( Object.create( KeyframeTrack.prototype ), {\n\n\tconstructor: ColorKeyframeTrack,\n\n\tValueTypeName: 'color'\n\n\t// ValueBufferType is inherited\n\n\t// DefaultInterpolation is inherited\n\n\t// Note: Very basic implementation and nothing special yet.\n\t// However, this is the place for color space parameterization.\n\n} );\n\n/**\n * A Track of numeric keyframe values.\n */\n\nfunction NumberKeyframeTrack( name, times, values, interpolation ) {\n\n\tKeyframeTrack.call( this, name, times, values, interpolation );\n\n}\n\nNumberKeyframeTrack.prototype = Object.assign( Object.create( KeyframeTrack.prototype ), {\n\n\tconstructor: NumberKeyframeTrack,\n\n\tValueTypeName: 'number'\n\n\t// ValueBufferType is inherited\n\n\t// DefaultInterpolation is inherited\n\n} );\n\n/**\n * Spherical linear unit quaternion interpolant.\n */\n\nfunction QuaternionLinearInterpolant( parameterPositions, sampleValues, sampleSize, resultBuffer ) {\n\n\tInterpolant.call( this, parameterPositions, sampleValues, sampleSize, resultBuffer );\n\n}\n\nQuaternionLinearInterpolant.prototype = Object.assign( Object.create( Interpolant.prototype ), {\n\n\tconstructor: QuaternionLinearInterpolant,\n\n\tinterpolate_: function ( i1, t0, t, t1 ) {\n\n\t\tconst result = this.resultBuffer,\n\t\t\tvalues = this.sampleValues,\n\t\t\tstride = this.valueSize,\n\n\t\t\talpha = ( t - t0 ) / ( t1 - t0 );\n\n\t\tlet offset = i1 * stride;\n\n\t\tfor ( let end = offset + stride; offset !== end; offset += 4 ) {\n\n\t\t\tQuaternion.slerpFlat( result, 0, values, offset - stride, values, offset, alpha );\n\n\t\t}\n\n\t\treturn result;\n\n\t}\n\n} );\n\n/**\n * A Track of quaternion keyframe values.\n */\n\nfunction QuaternionKeyframeTrack( name, times, values, interpolation ) {\n\n\tKeyframeTrack.call( this, name, times, values, interpolation );\n\n}\n\nQuaternionKeyframeTrack.prototype = Object.assign( Object.create( KeyframeTrack.prototype ), {\n\n\tconstructor: QuaternionKeyframeTrack,\n\n\tValueTypeName: 'quaternion',\n\n\t// ValueBufferType is inherited\n\n\tDefaultInterpolation: InterpolateLinear,\n\n\tInterpolantFactoryMethodLinear: function ( result ) {\n\n\t\treturn new QuaternionLinearInterpolant( this.times, this.values, this.getValueSize(), result );\n\n\t},\n\n\tInterpolantFactoryMethodSmooth: undefined // not yet implemented\n\n} );\n\n/**\n * A Track that interpolates Strings\n */\n\nfunction StringKeyframeTrack( name, times, values, interpolation ) {\n\n\tKeyframeTrack.call( this, name, times, values, interpolation );\n\n}\n\nStringKeyframeTrack.prototype = Object.assign( Object.create( KeyframeTrack.prototype ), {\n\n\tconstructor: StringKeyframeTrack,\n\n\tValueTypeName: 'string',\n\tValueBufferType: Array,\n\n\tDefaultInterpolation: InterpolateDiscrete,\n\n\tInterpolantFactoryMethodLinear: undefined,\n\n\tInterpolantFactoryMethodSmooth: undefined\n\n} );\n\n/**\n * A Track of vectored keyframe values.\n */\n\nfunction VectorKeyframeTrack( name, times, values, interpolation ) {\n\n\tKeyframeTrack.call( this, name, times, values, interpolation );\n\n}\n\nVectorKeyframeTrack.prototype = Object.assign( Object.create( KeyframeTrack.prototype ), {\n\n\tconstructor: VectorKeyframeTrack,\n\n\tValueTypeName: 'vector'\n\n\t// ValueBufferType is inherited\n\n\t// DefaultInterpolation is inherited\n\n} );\n\nfunction AnimationClip( name, duration = - 1, tracks, blendMode = NormalAnimationBlendMode ) {\n\n\tthis.name = name;\n\tthis.tracks = tracks;\n\tthis.duration = duration;\n\tthis.blendMode = blendMode;\n\n\tthis.uuid = MathUtils.generateUUID();\n\n\t// this means it should figure out its duration by scanning the tracks\n\tif ( this.duration < 0 ) {\n\n\t\tthis.resetDuration();\n\n\t}\n\n}\n\nfunction getTrackTypeForValueTypeName( typeName ) {\n\n\tswitch ( typeName.toLowerCase() ) {\n\n\t\tcase 'scalar':\n\t\tcase 'double':\n\t\tcase 'float':\n\t\tcase 'number':\n\t\tcase 'integer':\n\n\t\t\treturn NumberKeyframeTrack;\n\n\t\tcase 'vector':\n\t\tcase 'vector2':\n\t\tcase 'vector3':\n\t\tcase 'vector4':\n\n\t\t\treturn VectorKeyframeTrack;\n\n\t\tcase 'color':\n\n\t\t\treturn ColorKeyframeTrack;\n\n\t\tcase 'quaternion':\n\n\t\t\treturn QuaternionKeyframeTrack;\n\n\t\tcase 'bool':\n\t\tcase 'boolean':\n\n\t\t\treturn BooleanKeyframeTrack;\n\n\t\tcase 'string':\n\n\t\t\treturn StringKeyframeTrack;\n\n\t}\n\n\tthrow new Error( 'THREE.KeyframeTrack: Unsupported typeName: ' + typeName );\n\n}\n\nfunction parseKeyframeTrack( json ) {\n\n\tif ( json.type === undefined ) {\n\n\t\tthrow new Error( 'THREE.KeyframeTrack: track type undefined, can not parse' );\n\n\t}\n\n\tconst trackType = getTrackTypeForValueTypeName( json.type );\n\n\tif ( json.times === undefined ) {\n\n\t\tconst times = [], values = [];\n\n\t\tAnimationUtils.flattenJSON( json.keys, times, values, 'value' );\n\n\t\tjson.times = times;\n\t\tjson.values = values;\n\n\t}\n\n\t// derived classes can define a static parse method\n\tif ( trackType.parse !== undefined ) {\n\n\t\treturn trackType.parse( json );\n\n\t} else {\n\n\t\t// by default, we assume a constructor compatible with the base\n\t\treturn new trackType( json.name, json.times, json.values, json.interpolation );\n\n\t}\n\n}\n\nObject.assign( AnimationClip, {\n\n\tparse: function ( json ) {\n\n\t\tconst tracks = [],\n\t\t\tjsonTracks = json.tracks,\n\t\t\tframeTime = 1.0 / ( json.fps || 1.0 );\n\n\t\tfor ( let i = 0, n = jsonTracks.length; i !== n; ++ i ) {\n\n\t\t\ttracks.push( parseKeyframeTrack( jsonTracks[ i ] ).scale( frameTime ) );\n\n\t\t}\n\n\t\tconst clip = new AnimationClip( json.name, json.duration, tracks, json.blendMode );\n\t\tclip.uuid = json.uuid;\n\n\t\treturn clip;\n\n\t},\n\n\ttoJSON: function ( clip ) {\n\n\t\tconst tracks = [],\n\t\t\tclipTracks = clip.tracks;\n\n\t\tconst json = {\n\n\t\t\t'name': clip.name,\n\t\t\t'duration': clip.duration,\n\t\t\t'tracks': tracks,\n\t\t\t'uuid': clip.uuid,\n\t\t\t'blendMode': clip.blendMode\n\n\t\t};\n\n\t\tfor ( let i = 0, n = clipTracks.length; i !== n; ++ i ) {\n\n\t\t\ttracks.push( KeyframeTrack.toJSON( clipTracks[ i ] ) );\n\n\t\t}\n\n\t\treturn json;\n\n\t},\n\n\tCreateFromMorphTargetSequence: function ( name, morphTargetSequence, fps, noLoop ) {\n\n\t\tconst numMorphTargets = morphTargetSequence.length;\n\t\tconst tracks = [];\n\n\t\tfor ( let i = 0; i < numMorphTargets; i ++ ) {\n\n\t\t\tlet times = [];\n\t\t\tlet values = [];\n\n\t\t\ttimes.push(\n\t\t\t\t( i + numMorphTargets - 1 ) % numMorphTargets,\n\t\t\t\ti,\n\t\t\t\t( i + 1 ) % numMorphTargets );\n\n\t\t\tvalues.push( 0, 1, 0 );\n\n\t\t\tconst order = AnimationUtils.getKeyframeOrder( times );\n\t\t\ttimes = AnimationUtils.sortedArray( times, 1, order );\n\t\t\tvalues = AnimationUtils.sortedArray( values, 1, order );\n\n\t\t\t// if there is a key at the first frame, duplicate it as the\n\t\t\t// last frame as well for perfect loop.\n\t\t\tif ( ! noLoop && times[ 0 ] === 0 ) {\n\n\t\t\t\ttimes.push( numMorphTargets );\n\t\t\t\tvalues.push( values[ 0 ] );\n\n\t\t\t}\n\n\t\t\ttracks.push(\n\t\t\t\tnew NumberKeyframeTrack(\n\t\t\t\t\t'.morphTargetInfluences[' + morphTargetSequence[ i ].name + ']',\n\t\t\t\t\ttimes, values\n\t\t\t\t).scale( 1.0 / fps ) );\n\n\t\t}\n\n\t\treturn new AnimationClip( name, - 1, tracks );\n\n\t},\n\n\tfindByName: function ( objectOrClipArray, name ) {\n\n\t\tlet clipArray = objectOrClipArray;\n\n\t\tif ( ! Array.isArray( objectOrClipArray ) ) {\n\n\t\t\tconst o = objectOrClipArray;\n\t\t\tclipArray = o.geometry && o.geometry.animations || o.animations;\n\n\t\t}\n\n\t\tfor ( let i = 0; i < clipArray.length; i ++ ) {\n\n\t\t\tif ( clipArray[ i ].name === name ) {\n\n\t\t\t\treturn clipArray[ i ];\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn null;\n\n\t},\n\n\tCreateClipsFromMorphTargetSequences: function ( morphTargets, fps, noLoop ) {\n\n\t\tconst animationToMorphTargets = {};\n\n\t\t// tested with https://regex101.com/ on trick sequences\n\t\t// such flamingo_flyA_003, flamingo_run1_003, crdeath0059\n\t\tconst pattern = /^([\\w-]*?)([\\d]+)$/;\n\n\t\t// sort morph target names into animation groups based\n\t\t// patterns like Walk_001, Walk_002, Run_001, Run_002\n\t\tfor ( let i = 0, il = morphTargets.length; i < il; i ++ ) {\n\n\t\t\tconst morphTarget = morphTargets[ i ];\n\t\t\tconst parts = morphTarget.name.match( pattern );\n\n\t\t\tif ( parts && parts.length > 1 ) {\n\n\t\t\t\tconst name = parts[ 1 ];\n\n\t\t\t\tlet animationMorphTargets = animationToMorphTargets[ name ];\n\n\t\t\t\tif ( ! animationMorphTargets ) {\n\n\t\t\t\t\tanimationToMorphTargets[ name ] = animationMorphTargets = [];\n\n\t\t\t\t}\n\n\t\t\t\tanimationMorphTargets.push( morphTarget );\n\n\t\t\t}\n\n\t\t}\n\n\t\tconst clips = [];\n\n\t\tfor ( const name in animationToMorphTargets ) {\n\n\t\t\tclips.push( AnimationClip.CreateFromMorphTargetSequence( name, animationToMorphTargets[ name ], fps, noLoop ) );\n\n\t\t}\n\n\t\treturn clips;\n\n\t},\n\n\t// parse the animation.hierarchy format\n\tparseAnimation: function ( animation, bones ) {\n\n\t\tif ( ! animation ) {\n\n\t\t\tconsole.error( 'THREE.AnimationClip: No animation in JSONLoader data.' );\n\t\t\treturn null;\n\n\t\t}\n\n\t\tconst addNonemptyTrack = function ( trackType, trackName, animationKeys, propertyName, destTracks ) {\n\n\t\t\t// only return track if there are actually keys.\n\t\t\tif ( animationKeys.length !== 0 ) {\n\n\t\t\t\tconst times = [];\n\t\t\t\tconst values = [];\n\n\t\t\t\tAnimationUtils.flattenJSON( animationKeys, times, values, propertyName );\n\n\t\t\t\t// empty keys are filtered out, so check again\n\t\t\t\tif ( times.length !== 0 ) {\n\n\t\t\t\t\tdestTracks.push( new trackType( trackName, times, values ) );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t};\n\n\t\tconst tracks = [];\n\n\t\tconst clipName = animation.name || 'default';\n\t\tconst fps = animation.fps || 30;\n\t\tconst blendMode = animation.blendMode;\n\n\t\t// automatic length determination in AnimationClip.\n\t\tlet duration = animation.length || - 1;\n\n\t\tconst hierarchyTracks = animation.hierarchy || [];\n\n\t\tfor ( let h = 0; h < hierarchyTracks.length; h ++ ) {\n\n\t\t\tconst animationKeys = hierarchyTracks[ h ].keys;\n\n\t\t\t// skip empty tracks\n\t\t\tif ( ! animationKeys || animationKeys.length === 0 ) continue;\n\n\t\t\t// process morph targets\n\t\t\tif ( animationKeys[ 0 ].morphTargets ) {\n\n\t\t\t\t// figure out all morph targets used in this track\n\t\t\t\tconst morphTargetNames = {};\n\n\t\t\t\tlet k;\n\n\t\t\t\tfor ( k = 0; k < animationKeys.length; k ++ ) {\n\n\t\t\t\t\tif ( animationKeys[ k ].morphTargets ) {\n\n\t\t\t\t\t\tfor ( let m = 0; m < animationKeys[ k ].morphTargets.length; m ++ ) {\n\n\t\t\t\t\t\t\tmorphTargetNames[ animationKeys[ k ].morphTargets[ m ] ] = - 1;\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\t// create a track for each morph target with all zero\n\t\t\t\t// morphTargetInfluences except for the keys in which\n\t\t\t\t// the morphTarget is named.\n\t\t\t\tfor ( const morphTargetName in morphTargetNames ) {\n\n\t\t\t\t\tconst times = [];\n\t\t\t\t\tconst values = [];\n\n\t\t\t\t\tfor ( let m = 0; m !== animationKeys[ k ].morphTargets.length; ++ m ) {\n\n\t\t\t\t\t\tconst animationKey = animationKeys[ k ];\n\n\t\t\t\t\t\ttimes.push( animationKey.time );\n\t\t\t\t\t\tvalues.push( ( animationKey.morphTarget === morphTargetName ) ? 1 : 0 );\n\n\t\t\t\t\t}\n\n\t\t\t\t\ttracks.push( new NumberKeyframeTrack( '.morphTargetInfluence[' + morphTargetName + ']', times, values ) );\n\n\t\t\t\t}\n\n\t\t\t\tduration = morphTargetNames.length * ( fps || 1.0 );\n\n\t\t\t} else {\n\n\t\t\t\t// ...assume skeletal animation\n\n\t\t\t\tconst boneName = '.bones[' + bones[ h ].name + ']';\n\n\t\t\t\taddNonemptyTrack(\n\t\t\t\t\tVectorKeyframeTrack, boneName + '.position',\n\t\t\t\t\tanimationKeys, 'pos', tracks );\n\n\t\t\t\taddNonemptyTrack(\n\t\t\t\t\tQuaternionKeyframeTrack, boneName + '.quaternion',\n\t\t\t\t\tanimationKeys, 'rot', tracks );\n\n\t\t\t\taddNonemptyTrack(\n\t\t\t\t\tVectorKeyframeTrack, boneName + '.scale',\n\t\t\t\t\tanimationKeys, 'scl', tracks );\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( tracks.length === 0 ) {\n\n\t\t\treturn null;\n\n\t\t}\n\n\t\tconst clip = new AnimationClip( clipName, duration, tracks, blendMode );\n\n\t\treturn clip;\n\n\t}\n\n} );\n\nObject.assign( AnimationClip.prototype, {\n\n\tresetDuration: function () {\n\n\t\tconst tracks = this.tracks;\n\t\tlet duration = 0;\n\n\t\tfor ( let i = 0, n = tracks.length; i !== n; ++ i ) {\n\n\t\t\tconst track = this.tracks[ i ];\n\n\t\t\tduration = Math.max( duration, track.times[ track.times.length - 1 ] );\n\n\t\t}\n\n\t\tthis.duration = duration;\n\n\t\treturn this;\n\n\t},\n\n\ttrim: function () {\n\n\t\tfor ( let i = 0; i < this.tracks.length; i ++ ) {\n\n\t\t\tthis.tracks[ i ].trim( 0, this.duration );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tvalidate: function () {\n\n\t\tlet valid = true;\n\n\t\tfor ( let i = 0; i < this.tracks.length; i ++ ) {\n\n\t\t\tvalid = valid && this.tracks[ i ].validate();\n\n\t\t}\n\n\t\treturn valid;\n\n\t},\n\n\toptimize: function () {\n\n\t\tfor ( let i = 0; i < this.tracks.length; i ++ ) {\n\n\t\t\tthis.tracks[ i ].optimize();\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tclone: function () {\n\n\t\tconst tracks = [];\n\n\t\tfor ( let i = 0; i < this.tracks.length; i ++ ) {\n\n\t\t\ttracks.push( this.tracks[ i ].clone() );\n\n\t\t}\n\n\t\treturn new AnimationClip( this.name, this.duration, tracks, this.blendMode );\n\n\t},\n\n\ttoJSON: function () {\n\n\t\treturn AnimationClip.toJSON( this );\n\n\t}\n\n} );\n\nconst Cache = {\n\n\tenabled: false,\n\n\tfiles: {},\n\n\tadd: function ( key, file ) {\n\n\t\tif ( this.enabled === false ) return;\n\n\t\t// console.log( 'THREE.Cache', 'Adding key:', key );\n\n\t\tthis.files[ key ] = file;\n\n\t},\n\n\tget: function ( key ) {\n\n\t\tif ( this.enabled === false ) return;\n\n\t\t// console.log( 'THREE.Cache', 'Checking key:', key );\n\n\t\treturn this.files[ key ];\n\n\t},\n\n\tremove: function ( key ) {\n\n\t\tdelete this.files[ key ];\n\n\t},\n\n\tclear: function () {\n\n\t\tthis.files = {};\n\n\t}\n\n};\n\nfunction LoadingManager( onLoad, onProgress, onError ) {\n\n\tconst scope = this;\n\n\tlet isLoading = false;\n\tlet itemsLoaded = 0;\n\tlet itemsTotal = 0;\n\tlet urlModifier = undefined;\n\tconst handlers = [];\n\n\t// Refer to #5689 for the reason why we don't set .onStart\n\t// in the constructor\n\n\tthis.onStart = undefined;\n\tthis.onLoad = onLoad;\n\tthis.onProgress = onProgress;\n\tthis.onError = onError;\n\n\tthis.itemStart = function ( url ) {\n\n\t\titemsTotal ++;\n\n\t\tif ( isLoading === false ) {\n\n\t\t\tif ( scope.onStart !== undefined ) {\n\n\t\t\t\tscope.onStart( url, itemsLoaded, itemsTotal );\n\n\t\t\t}\n\n\t\t}\n\n\t\tisLoading = true;\n\n\t};\n\n\tthis.itemEnd = function ( url ) {\n\n\t\titemsLoaded ++;\n\n\t\tif ( scope.onProgress !== undefined ) {\n\n\t\t\tscope.onProgress( url, itemsLoaded, itemsTotal );\n\n\t\t}\n\n\t\tif ( itemsLoaded === itemsTotal ) {\n\n\t\t\tisLoading = false;\n\n\t\t\tif ( scope.onLoad !== undefined ) {\n\n\t\t\t\tscope.onLoad();\n\n\t\t\t}\n\n\t\t}\n\n\t};\n\n\tthis.itemError = function ( url ) {\n\n\t\tif ( scope.onError !== undefined ) {\n\n\t\t\tscope.onError( url );\n\n\t\t}\n\n\t};\n\n\tthis.resolveURL = function ( url ) {\n\n\t\tif ( urlModifier ) {\n\n\t\t\treturn urlModifier( url );\n\n\t\t}\n\n\t\treturn url;\n\n\t};\n\n\tthis.setURLModifier = function ( transform ) {\n\n\t\turlModifier = transform;\n\n\t\treturn this;\n\n\t};\n\n\tthis.addHandler = function ( regex, loader ) {\n\n\t\thandlers.push( regex, loader );\n\n\t\treturn this;\n\n\t};\n\n\tthis.removeHandler = function ( regex ) {\n\n\t\tconst index = handlers.indexOf( regex );\n\n\t\tif ( index !== - 1 ) {\n\n\t\t\thandlers.splice( index, 2 );\n\n\t\t}\n\n\t\treturn this;\n\n\t};\n\n\tthis.getHandler = function ( file ) {\n\n\t\tfor ( let i = 0, l = handlers.length; i < l; i += 2 ) {\n\n\t\t\tconst regex = handlers[ i ];\n\t\t\tconst loader = handlers[ i + 1 ];\n\n\t\t\tif ( regex.global ) regex.lastIndex = 0; // see #17920\n\n\t\t\tif ( regex.test( file ) ) {\n\n\t\t\t\treturn loader;\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn null;\n\n\t};\n\n}\n\nconst DefaultLoadingManager = new LoadingManager();\n\nfunction Loader( manager ) {\n\n\tthis.manager = ( manager !== undefined ) ? manager : DefaultLoadingManager;\n\n\tthis.crossOrigin = 'anonymous';\n\tthis.withCredentials = false;\n\tthis.path = '';\n\tthis.resourcePath = '';\n\tthis.requestHeader = {};\n\n}\n\nObject.assign( Loader.prototype, {\n\n\tload: function ( /* url, onLoad, onProgress, onError */ ) {},\n\n\tloadAsync: function ( url, onProgress ) {\n\n\t\tconst scope = this;\n\n\t\treturn new Promise( function ( resolve, reject ) {\n\n\t\t\tscope.load( url, resolve, onProgress, reject );\n\n\t\t} );\n\n\t},\n\n\tparse: function ( /* data */ ) {},\n\n\tsetCrossOrigin: function ( crossOrigin ) {\n\n\t\tthis.crossOrigin = crossOrigin;\n\t\treturn this;\n\n\t},\n\n\tsetWithCredentials: function ( value ) {\n\n\t\tthis.withCredentials = value;\n\t\treturn this;\n\n\t},\n\n\tsetPath: function ( path ) {\n\n\t\tthis.path = path;\n\t\treturn this;\n\n\t},\n\n\tsetResourcePath: function ( resourcePath ) {\n\n\t\tthis.resourcePath = resourcePath;\n\t\treturn this;\n\n\t},\n\n\tsetRequestHeader: function ( requestHeader ) {\n\n\t\tthis.requestHeader = requestHeader;\n\t\treturn this;\n\n\t}\n\n} );\n\nconst loading = {};\n\nfunction FileLoader( manager ) {\n\n\tLoader.call( this, manager );\n\n}\n\nFileLoader.prototype = Object.assign( Object.create( Loader.prototype ), {\n\n\tconstructor: FileLoader,\n\n\tload: function ( url, onLoad, onProgress, onError ) {\n\n\t\tif ( url === undefined ) url = '';\n\n\t\tif ( this.path !== undefined ) url = this.path + url;\n\n\t\turl = this.manager.resolveURL( url );\n\n\t\tconst scope = this;\n\n\t\tconst cached = Cache.get( url );\n\n\t\tif ( cached !== undefined ) {\n\n\t\t\tscope.manager.itemStart( url );\n\n\t\t\tsetTimeout( function () {\n\n\t\t\t\tif ( onLoad ) onLoad( cached );\n\n\t\t\t\tscope.manager.itemEnd( url );\n\n\t\t\t}, 0 );\n\n\t\t\treturn cached;\n\n\t\t}\n\n\t\t// Check if request is duplicate\n\n\t\tif ( loading[ url ] !== undefined ) {\n\n\t\t\tloading[ url ].push( {\n\n\t\t\t\tonLoad: onLoad,\n\t\t\t\tonProgress: onProgress,\n\t\t\t\tonError: onError\n\n\t\t\t} );\n\n\t\t\treturn;\n\n\t\t}\n\n\t\t// Check for data: URI\n\t\tconst dataUriRegex = /^data:(.*?)(;base64)?,(.*)$/;\n\t\tconst dataUriRegexResult = url.match( dataUriRegex );\n\t\tlet request;\n\n\t\t// Safari can not handle Data URIs through XMLHttpRequest so process manually\n\t\tif ( dataUriRegexResult ) {\n\n\t\t\tconst mimeType = dataUriRegexResult[ 1 ];\n\t\t\tconst isBase64 = !! dataUriRegexResult[ 2 ];\n\n\t\t\tlet data = dataUriRegexResult[ 3 ];\n\t\t\tdata = decodeURIComponent( data );\n\n\t\t\tif ( isBase64 ) data = atob( data );\n\n\t\t\ttry {\n\n\t\t\t\tlet response;\n\t\t\t\tconst responseType = ( this.responseType || '' ).toLowerCase();\n\n\t\t\t\tswitch ( responseType ) {\n\n\t\t\t\t\tcase 'arraybuffer':\n\t\t\t\t\tcase 'blob':\n\n\t\t\t\t\t\tconst view = new Uint8Array( data.length );\n\n\t\t\t\t\t\tfor ( let i = 0; i < data.length; i ++ ) {\n\n\t\t\t\t\t\t\tview[ i ] = data.charCodeAt( i );\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tif ( responseType === 'blob' ) {\n\n\t\t\t\t\t\t\tresponse = new Blob( [ view.buffer ], { type: mimeType } );\n\n\t\t\t\t\t\t} else {\n\n\t\t\t\t\t\t\tresponse = view.buffer;\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'document':\n\n\t\t\t\t\t\tconst parser = new DOMParser();\n\t\t\t\t\t\tresponse = parser.parseFromString( data, mimeType );\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'json':\n\n\t\t\t\t\t\tresponse = JSON.parse( data );\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tdefault: // 'text' or other\n\n\t\t\t\t\t\tresponse = data;\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t}\n\n\t\t\t\t// Wait for next browser tick like standard XMLHttpRequest event dispatching does\n\t\t\t\tsetTimeout( function () {\n\n\t\t\t\t\tif ( onLoad ) onLoad( response );\n\n\t\t\t\t\tscope.manager.itemEnd( url );\n\n\t\t\t\t}, 0 );\n\n\t\t\t} catch ( error ) {\n\n\t\t\t\t// Wait for next browser tick like standard XMLHttpRequest event dispatching does\n\t\t\t\tsetTimeout( function () {\n\n\t\t\t\t\tif ( onError ) onError( error );\n\n\t\t\t\t\tscope.manager.itemError( url );\n\t\t\t\t\tscope.manager.itemEnd( url );\n\n\t\t\t\t}, 0 );\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\t// Initialise array for duplicate requests\n\n\t\t\tloading[ url ] = [];\n\n\t\t\tloading[ url ].push( {\n\n\t\t\t\tonLoad: onLoad,\n\t\t\t\tonProgress: onProgress,\n\t\t\t\tonError: onError\n\n\t\t\t} );\n\n\t\t\trequest = new XMLHttpRequest();\n\n\t\t\trequest.open( 'GET', url, true );\n\n\t\t\trequest.addEventListener( 'load', function ( event ) {\n\n\t\t\t\tconst response = this.response;\n\n\t\t\t\tconst callbacks = loading[ url ];\n\n\t\t\t\tdelete loading[ url ];\n\n\t\t\t\tif ( this.status === 200 || this.status === 0 ) {\n\n\t\t\t\t\t// Some browsers return HTTP Status 0 when using non-http protocol\n\t\t\t\t\t// e.g. 'file://' or 'data://'. Handle as success.\n\n\t\t\t\t\tif ( this.status === 0 ) console.warn( 'THREE.FileLoader: HTTP Status 0 received.' );\n\n\t\t\t\t\t// Add to cache only on HTTP success, so that we do not cache\n\t\t\t\t\t// error response bodies as proper responses to requests.\n\t\t\t\t\tCache.add( url, response );\n\n\t\t\t\t\tfor ( let i = 0, il = callbacks.length; i < il; i ++ ) {\n\n\t\t\t\t\t\tconst callback = callbacks[ i ];\n\t\t\t\t\t\tif ( callback.onLoad ) callback.onLoad( response );\n\n\t\t\t\t\t}\n\n\t\t\t\t\tscope.manager.itemEnd( url );\n\n\t\t\t\t} else {\n\n\t\t\t\t\tfor ( let i = 0, il = callbacks.length; i < il; i ++ ) {\n\n\t\t\t\t\t\tconst callback = callbacks[ i ];\n\t\t\t\t\t\tif ( callback.onError ) callback.onError( event );\n\n\t\t\t\t\t}\n\n\t\t\t\t\tscope.manager.itemError( url );\n\t\t\t\t\tscope.manager.itemEnd( url );\n\n\t\t\t\t}\n\n\t\t\t}, false );\n\n\t\t\trequest.addEventListener( 'progress', function ( event ) {\n\n\t\t\t\tconst callbacks = loading[ url ];\n\n\t\t\t\tfor ( let i = 0, il = callbacks.length; i < il; i ++ ) {\n\n\t\t\t\t\tconst callback = callbacks[ i ];\n\t\t\t\t\tif ( callback.onProgress ) callback.onProgress( event );\n\n\t\t\t\t}\n\n\t\t\t}, false );\n\n\t\t\trequest.addEventListener( 'error', function ( event ) {\n\n\t\t\t\tconst callbacks = loading[ url ];\n\n\t\t\t\tdelete loading[ url ];\n\n\t\t\t\tfor ( let i = 0, il = callbacks.length; i < il; i ++ ) {\n\n\t\t\t\t\tconst callback = callbacks[ i ];\n\t\t\t\t\tif ( callback.onError ) callback.onError( event );\n\n\t\t\t\t}\n\n\t\t\t\tscope.manager.itemError( url );\n\t\t\t\tscope.manager.itemEnd( url );\n\n\t\t\t}, false );\n\n\t\t\trequest.addEventListener( 'abort', function ( event ) {\n\n\t\t\t\tconst callbacks = loading[ url ];\n\n\t\t\t\tdelete loading[ url ];\n\n\t\t\t\tfor ( let i = 0, il = callbacks.length; i < il; i ++ ) {\n\n\t\t\t\t\tconst callback = callbacks[ i ];\n\t\t\t\t\tif ( callback.onError ) callback.onError( event );\n\n\t\t\t\t}\n\n\t\t\t\tscope.manager.itemError( url );\n\t\t\t\tscope.manager.itemEnd( url );\n\n\t\t\t}, false );\n\n\t\t\tif ( this.responseType !== undefined ) request.responseType = this.responseType;\n\t\t\tif ( this.withCredentials !== undefined ) request.withCredentials = this.withCredentials;\n\n\t\t\tif ( request.overrideMimeType ) request.overrideMimeType( this.mimeType !== undefined ? this.mimeType : 'text/plain' );\n\n\t\t\tfor ( const header in this.requestHeader ) {\n\n\t\t\t\trequest.setRequestHeader( header, this.requestHeader[ header ] );\n\n\t\t\t}\n\n\t\t\trequest.send( null );\n\n\t\t}\n\n\t\tscope.manager.itemStart( url );\n\n\t\treturn request;\n\n\t},\n\n\tsetResponseType: function ( value ) {\n\n\t\tthis.responseType = value;\n\t\treturn this;\n\n\t},\n\n\tsetMimeType: function ( value ) {\n\n\t\tthis.mimeType = value;\n\t\treturn this;\n\n\t}\n\n} );\n\nfunction AnimationLoader( manager ) {\n\n\tLoader.call( this, manager );\n\n}\n\nAnimationLoader.prototype = Object.assign( Object.create( Loader.prototype ), {\n\n\tconstructor: AnimationLoader,\n\n\tload: function ( url, onLoad, onProgress, onError ) {\n\n\t\tconst scope = this;\n\n\t\tconst loader = new FileLoader( scope.manager );\n\t\tloader.setPath( scope.path );\n\t\tloader.setRequestHeader( scope.requestHeader );\n\t\tloader.setWithCredentials( scope.withCredentials );\n\t\tloader.load( url, function ( text ) {\n\n\t\t\ttry {\n\n\t\t\t\tonLoad( scope.parse( JSON.parse( text ) ) );\n\n\t\t\t} catch ( e ) {\n\n\t\t\t\tif ( onError ) {\n\n\t\t\t\t\tonError( e );\n\n\t\t\t\t} else {\n\n\t\t\t\t\tconsole.error( e );\n\n\t\t\t\t}\n\n\t\t\t\tscope.manager.itemError( url );\n\n\t\t\t}\n\n\t\t}, onProgress, onError );\n\n\t},\n\n\tparse: function ( json ) {\n\n\t\tconst animations = [];\n\n\t\tfor ( let i = 0; i < json.length; i ++ ) {\n\n\t\t\tconst clip = AnimationClip.parse( json[ i ] );\n\n\t\t\tanimations.push( clip );\n\n\t\t}\n\n\t\treturn animations;\n\n\t}\n\n} );\n\n/**\n * Abstract Base class to block based textures loader (dds, pvr, ...)\n *\n * Sub classes have to implement the parse() method which will be used in load().\n */\n\nfunction CompressedTextureLoader( manager ) {\n\n\tLoader.call( this, manager );\n\n}\n\nCompressedTextureLoader.prototype = Object.assign( Object.create( Loader.prototype ), {\n\n\tconstructor: CompressedTextureLoader,\n\n\tload: function ( url, onLoad, onProgress, onError ) {\n\n\t\tconst scope = this;\n\n\t\tconst images = [];\n\n\t\tconst texture = new CompressedTexture();\n\n\t\tconst loader = new FileLoader( this.manager );\n\t\tloader.setPath( this.path );\n\t\tloader.setResponseType( 'arraybuffer' );\n\t\tloader.setRequestHeader( this.requestHeader );\n\t\tloader.setWithCredentials( scope.withCredentials );\n\n\t\tlet loaded = 0;\n\n\t\tfunction loadTexture( i ) {\n\n\t\t\tloader.load( url[ i ], function ( buffer ) {\n\n\t\t\t\tconst texDatas = scope.parse( buffer, true );\n\n\t\t\t\timages[ i ] = {\n\t\t\t\t\twidth: texDatas.width,\n\t\t\t\t\theight: texDatas.height,\n\t\t\t\t\tformat: texDatas.format,\n\t\t\t\t\tmipmaps: texDatas.mipmaps\n\t\t\t\t};\n\n\t\t\t\tloaded += 1;\n\n\t\t\t\tif ( loaded === 6 ) {\n\n\t\t\t\t\tif ( texDatas.mipmapCount === 1 ) texture.minFilter = LinearFilter;\n\n\t\t\t\t\ttexture.image = images;\n\t\t\t\t\ttexture.format = texDatas.format;\n\t\t\t\t\ttexture.needsUpdate = true;\n\n\t\t\t\t\tif ( onLoad ) onLoad( texture );\n\n\t\t\t\t}\n\n\t\t\t}, onProgress, onError );\n\n\t\t}\n\n\t\tif ( Array.isArray( url ) ) {\n\n\t\t\tfor ( let i = 0, il = url.length; i < il; ++ i ) {\n\n\t\t\t\tloadTexture( i );\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\t// compressed cubemap texture stored in a single DDS file\n\n\t\t\tloader.load( url, function ( buffer ) {\n\n\t\t\t\tconst texDatas = scope.parse( buffer, true );\n\n\t\t\t\tif ( texDatas.isCubemap ) {\n\n\t\t\t\t\tconst faces = texDatas.mipmaps.length / texDatas.mipmapCount;\n\n\t\t\t\t\tfor ( let f = 0; f < faces; f ++ ) {\n\n\t\t\t\t\t\timages[ f ] = { mipmaps: [] };\n\n\t\t\t\t\t\tfor ( let i = 0; i < texDatas.mipmapCount; i ++ ) {\n\n\t\t\t\t\t\t\timages[ f ].mipmaps.push( texDatas.mipmaps[ f * texDatas.mipmapCount + i ] );\n\t\t\t\t\t\t\timages[ f ].format = texDatas.format;\n\t\t\t\t\t\t\timages[ f ].width = texDatas.width;\n\t\t\t\t\t\t\timages[ f ].height = texDatas.height;\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t\ttexture.image = images;\n\n\t\t\t\t} else {\n\n\t\t\t\t\ttexture.image.width = texDatas.width;\n\t\t\t\t\ttexture.image.height = texDatas.height;\n\t\t\t\t\ttexture.mipmaps = texDatas.mipmaps;\n\n\t\t\t\t}\n\n\t\t\t\tif ( texDatas.mipmapCount === 1 ) {\n\n\t\t\t\t\ttexture.minFilter = LinearFilter;\n\n\t\t\t\t}\n\n\t\t\t\ttexture.format = texDatas.format;\n\t\t\t\ttexture.needsUpdate = true;\n\n\t\t\t\tif ( onLoad ) onLoad( texture );\n\n\t\t\t}, onProgress, onError );\n\n\t\t}\n\n\t\treturn texture;\n\n\t}\n\n} );\n\nfunction ImageLoader( manager ) {\n\n\tLoader.call( this, manager );\n\n}\n\nImageLoader.prototype = Object.assign( Object.create( Loader.prototype ), {\n\n\tconstructor: ImageLoader,\n\n\tload: function ( url, onLoad, onProgress, onError ) {\n\n\t\tif ( this.path !== undefined ) url = this.path + url;\n\n\t\turl = this.manager.resolveURL( url );\n\n\t\tconst scope = this;\n\n\t\tconst cached = Cache.get( url );\n\n\t\tif ( cached !== undefined ) {\n\n\t\t\tscope.manager.itemStart( url );\n\n\t\t\tsetTimeout( function () {\n\n\t\t\t\tif ( onLoad ) onLoad( cached );\n\n\t\t\t\tscope.manager.itemEnd( url );\n\n\t\t\t}, 0 );\n\n\t\t\treturn cached;\n\n\t\t}\n\n\t\tconst image = document.createElementNS( 'http://www.w3.org/1999/xhtml', 'img' );\n\n\t\tfunction onImageLoad() {\n\n\t\t\timage.removeEventListener( 'load', onImageLoad, false );\n\t\t\timage.removeEventListener( 'error', onImageError, false );\n\n\t\t\tCache.add( url, this );\n\n\t\t\tif ( onLoad ) onLoad( this );\n\n\t\t\tscope.manager.itemEnd( url );\n\n\t\t}\n\n\t\tfunction onImageError( event ) {\n\n\t\t\timage.removeEventListener( 'load', onImageLoad, false );\n\t\t\timage.removeEventListener( 'error', onImageError, false );\n\n\t\t\tif ( onError ) onError( event );\n\n\t\t\tscope.manager.itemError( url );\n\t\t\tscope.manager.itemEnd( url );\n\n\t\t}\n\n\t\timage.addEventListener( 'load', onImageLoad, false );\n\t\timage.addEventListener( 'error', onImageError, false );\n\n\t\tif ( url.substr( 0, 5 ) !== 'data:' ) {\n\n\t\t\tif ( this.crossOrigin !== undefined ) image.crossOrigin = this.crossOrigin;\n\n\t\t}\n\n\t\tscope.manager.itemStart( url );\n\n\t\timage.src = url;\n\n\t\treturn image;\n\n\t}\n\n} );\n\nfunction CubeTextureLoader( manager ) {\n\n\tLoader.call( this, manager );\n\n}\n\nCubeTextureLoader.prototype = Object.assign( Object.create( Loader.prototype ), {\n\n\tconstructor: CubeTextureLoader,\n\n\tload: function ( urls, onLoad, onProgress, onError ) {\n\n\t\tconst texture = new CubeTexture();\n\n\t\tconst loader = new ImageLoader( this.manager );\n\t\tloader.setCrossOrigin( this.crossOrigin );\n\t\tloader.setPath( this.path );\n\n\t\tlet loaded = 0;\n\n\t\tfunction loadTexture( i ) {\n\n\t\t\tloader.load( urls[ i ], function ( image ) {\n\n\t\t\t\ttexture.images[ i ] = image;\n\n\t\t\t\tloaded ++;\n\n\t\t\t\tif ( loaded === 6 ) {\n\n\t\t\t\t\ttexture.needsUpdate = true;\n\n\t\t\t\t\tif ( onLoad ) onLoad( texture );\n\n\t\t\t\t}\n\n\t\t\t}, undefined, onError );\n\n\t\t}\n\n\t\tfor ( let i = 0; i < urls.length; ++ i ) {\n\n\t\t\tloadTexture( i );\n\n\t\t}\n\n\t\treturn texture;\n\n\t}\n\n} );\n\n/**\n * Abstract Base class to load generic binary textures formats (rgbe, hdr, ...)\n *\n * Sub classes have to implement the parse() method which will be used in load().\n */\n\nfunction DataTextureLoader( manager ) {\n\n\tLoader.call( this, manager );\n\n}\n\nDataTextureLoader.prototype = Object.assign( Object.create( Loader.prototype ), {\n\n\tconstructor: DataTextureLoader,\n\n\tload: function ( url, onLoad, onProgress, onError ) {\n\n\t\tconst scope = this;\n\n\t\tconst texture = new DataTexture();\n\n\t\tconst loader = new FileLoader( this.manager );\n\t\tloader.setResponseType( 'arraybuffer' );\n\t\tloader.setRequestHeader( this.requestHeader );\n\t\tloader.setPath( this.path );\n\t\tloader.setWithCredentials( scope.withCredentials );\n\t\tloader.load( url, function ( buffer ) {\n\n\t\t\tconst texData = scope.parse( buffer );\n\n\t\t\tif ( ! texData ) return;\n\n\t\t\tif ( texData.image !== undefined ) {\n\n\t\t\t\ttexture.image = texData.image;\n\n\t\t\t} else if ( texData.data !== undefined ) {\n\n\t\t\t\ttexture.image.width = texData.width;\n\t\t\t\ttexture.image.height = texData.height;\n\t\t\t\ttexture.image.data = texData.data;\n\n\t\t\t}\n\n\t\t\ttexture.wrapS = texData.wrapS !== undefined ? texData.wrapS : ClampToEdgeWrapping;\n\t\t\ttexture.wrapT = texData.wrapT !== undefined ? texData.wrapT : ClampToEdgeWrapping;\n\n\t\t\ttexture.magFilter = texData.magFilter !== undefined ? texData.magFilter : LinearFilter;\n\t\t\ttexture.minFilter = texData.minFilter !== undefined ? texData.minFilter : LinearFilter;\n\n\t\t\ttexture.anisotropy = texData.anisotropy !== undefined ? texData.anisotropy : 1;\n\n\t\t\tif ( texData.encoding !== undefined ) {\n\n\t\t\t\ttexture.encoding = texData.encoding;\n\n\t\t\t}\n\n\t\t\tif ( texData.flipY !== undefined ) {\n\n\t\t\t\ttexture.flipY = texData.flipY;\n\n\t\t\t}\n\n\t\t\tif ( texData.format !== undefined ) {\n\n\t\t\t\ttexture.format = texData.format;\n\n\t\t\t}\n\n\t\t\tif ( texData.type !== undefined ) {\n\n\t\t\t\ttexture.type = texData.type;\n\n\t\t\t}\n\n\t\t\tif ( texData.mipmaps !== undefined ) {\n\n\t\t\t\ttexture.mipmaps = texData.mipmaps;\n\t\t\t\ttexture.minFilter = LinearMipmapLinearFilter; // presumably...\n\n\t\t\t}\n\n\t\t\tif ( texData.mipmapCount === 1 ) {\n\n\t\t\t\ttexture.minFilter = LinearFilter;\n\n\t\t\t}\n\n\t\t\ttexture.needsUpdate = true;\n\n\t\t\tif ( onLoad ) onLoad( texture, texData );\n\n\t\t}, onProgress, onError );\n\n\n\t\treturn texture;\n\n\t}\n\n} );\n\nfunction TextureLoader( manager ) {\n\n\tLoader.call( this, manager );\n\n}\n\nTextureLoader.prototype = Object.assign( Object.create( Loader.prototype ), {\n\n\tconstructor: TextureLoader,\n\n\tload: function ( url, onLoad, onProgress, onError ) {\n\n\t\tconst texture = new Texture();\n\n\t\tconst loader = new ImageLoader( this.manager );\n\t\tloader.setCrossOrigin( this.crossOrigin );\n\t\tloader.setPath( this.path );\n\n\t\tloader.load( url, function ( image ) {\n\n\t\t\ttexture.image = image;\n\n\t\t\t// JPEGs can't have an alpha channel, so memory can be saved by storing them as RGB.\n\t\t\tconst isJPEG = url.search( /\\.jpe?g($|\\?)/i ) > 0 || url.search( /^data\\:image\\/jpeg/ ) === 0;\n\n\t\t\ttexture.format = isJPEG ? RGBFormat : RGBAFormat;\n\t\t\ttexture.needsUpdate = true;\n\n\t\t\tif ( onLoad !== undefined ) {\n\n\t\t\t\tonLoad( texture );\n\n\t\t\t}\n\n\t\t}, onProgress, onError );\n\n\t\treturn texture;\n\n\t}\n\n} );\n\n/**\n * Extensible curve object.\n *\n * Some common of curve methods:\n * .getPoint( t, optionalTarget ), .getTangent( t, optionalTarget )\n * .getPointAt( u, optionalTarget ), .getTangentAt( u, optionalTarget )\n * .getPoints(), .getSpacedPoints()\n * .getLength()\n * .updateArcLengths()\n *\n * This following curves inherit from THREE.Curve:\n *\n * -- 2D curves --\n * THREE.ArcCurve\n * THREE.CubicBezierCurve\n * THREE.EllipseCurve\n * THREE.LineCurve\n * THREE.QuadraticBezierCurve\n * THREE.SplineCurve\n *\n * -- 3D curves --\n * THREE.CatmullRomCurve3\n * THREE.CubicBezierCurve3\n * THREE.LineCurve3\n * THREE.QuadraticBezierCurve3\n *\n * A series of curves can be represented as a THREE.CurvePath.\n *\n **/\n\nfunction Curve() {\n\n\tthis.type = 'Curve';\n\n\tthis.arcLengthDivisions = 200;\n\n}\n\nObject.assign( Curve.prototype, {\n\n\t// Virtual base class method to overwrite and implement in subclasses\n\t//\t- t [0 .. 1]\n\n\tgetPoint: function ( /* t, optionalTarget */ ) {\n\n\t\tconsole.warn( 'THREE.Curve: .getPoint() not implemented.' );\n\t\treturn null;\n\n\t},\n\n\t// Get point at relative position in curve according to arc length\n\t// - u [0 .. 1]\n\n\tgetPointAt: function ( u, optionalTarget ) {\n\n\t\tconst t = this.getUtoTmapping( u );\n\t\treturn this.getPoint( t, optionalTarget );\n\n\t},\n\n\t// Get sequence of points using getPoint( t )\n\n\tgetPoints: function ( divisions = 5 ) {\n\n\t\tconst points = [];\n\n\t\tfor ( let d = 0; d <= divisions; d ++ ) {\n\n\t\t\tpoints.push( this.getPoint( d / divisions ) );\n\n\t\t}\n\n\t\treturn points;\n\n\t},\n\n\t// Get sequence of points using getPointAt( u )\n\n\tgetSpacedPoints: function ( divisions = 5 ) {\n\n\t\tconst points = [];\n\n\t\tfor ( let d = 0; d <= divisions; d ++ ) {\n\n\t\t\tpoints.push( this.getPointAt( d / divisions ) );\n\n\t\t}\n\n\t\treturn points;\n\n\t},\n\n\t// Get total curve arc length\n\n\tgetLength: function () {\n\n\t\tconst lengths = this.getLengths();\n\t\treturn lengths[ lengths.length - 1 ];\n\n\t},\n\n\t// Get list of cumulative segment lengths\n\n\tgetLengths: function ( divisions ) {\n\n\t\tif ( divisions === undefined ) divisions = this.arcLengthDivisions;\n\n\t\tif ( this.cacheArcLengths &&\n\t\t\t( this.cacheArcLengths.length === divisions + 1 ) &&\n\t\t\t! this.needsUpdate ) {\n\n\t\t\treturn this.cacheArcLengths;\n\n\t\t}\n\n\t\tthis.needsUpdate = false;\n\n\t\tconst cache = [];\n\t\tlet current, last = this.getPoint( 0 );\n\t\tlet sum = 0;\n\n\t\tcache.push( 0 );\n\n\t\tfor ( let p = 1; p <= divisions; p ++ ) {\n\n\t\t\tcurrent = this.getPoint( p / divisions );\n\t\t\tsum += current.distanceTo( last );\n\t\t\tcache.push( sum );\n\t\t\tlast = current;\n\n\t\t}\n\n\t\tthis.cacheArcLengths = cache;\n\n\t\treturn cache; // { sums: cache, sum: sum }; Sum is in the last element.\n\n\t},\n\n\tupdateArcLengths: function () {\n\n\t\tthis.needsUpdate = true;\n\t\tthis.getLengths();\n\n\t},\n\n\t// Given u ( 0 .. 1 ), get a t to find p. This gives you points which are equidistant\n\n\tgetUtoTmapping: function ( u, distance ) {\n\n\t\tconst arcLengths = this.getLengths();\n\n\t\tlet i = 0;\n\t\tconst il = arcLengths.length;\n\n\t\tlet targetArcLength; // The targeted u distance value to get\n\n\t\tif ( distance ) {\n\n\t\t\ttargetArcLength = distance;\n\n\t\t} else {\n\n\t\t\ttargetArcLength = u * arcLengths[ il - 1 ];\n\n\t\t}\n\n\t\t// binary search for the index with largest value smaller than target u distance\n\n\t\tlet low = 0, high = il - 1, comparison;\n\n\t\twhile ( low <= high ) {\n\n\t\t\ti = Math.floor( low + ( high - low ) / 2 ); // less likely to overflow, though probably not issue here, JS doesn't really have integers, all numbers are floats\n\n\t\t\tcomparison = arcLengths[ i ] - targetArcLength;\n\n\t\t\tif ( comparison < 0 ) {\n\n\t\t\t\tlow = i + 1;\n\n\t\t\t} else if ( comparison > 0 ) {\n\n\t\t\t\thigh = i - 1;\n\n\t\t\t} else {\n\n\t\t\t\thigh = i;\n\t\t\t\tbreak;\n\n\t\t\t\t// DONE\n\n\t\t\t}\n\n\t\t}\n\n\t\ti = high;\n\n\t\tif ( arcLengths[ i ] === targetArcLength ) {\n\n\t\t\treturn i / ( il - 1 );\n\n\t\t}\n\n\t\t// we could get finer grain at lengths, or use simple interpolation between two points\n\n\t\tconst lengthBefore = arcLengths[ i ];\n\t\tconst lengthAfter = arcLengths[ i + 1 ];\n\n\t\tconst segmentLength = lengthAfter - lengthBefore;\n\n\t\t// determine where we are between the 'before' and 'after' points\n\n\t\tconst segmentFraction = ( targetArcLength - lengthBefore ) / segmentLength;\n\n\t\t// add that fractional amount to t\n\n\t\tconst t = ( i + segmentFraction ) / ( il - 1 );\n\n\t\treturn t;\n\n\t},\n\n\t// Returns a unit vector tangent at t\n\t// In case any sub curve does not implement its tangent derivation,\n\t// 2 points a small delta apart will be used to find its gradient\n\t// which seems to give a reasonable approximation\n\n\tgetTangent: function ( t, optionalTarget ) {\n\n\t\tconst delta = 0.0001;\n\t\tlet t1 = t - delta;\n\t\tlet t2 = t + delta;\n\n\t\t// Capping in case of danger\n\n\t\tif ( t1 < 0 ) t1 = 0;\n\t\tif ( t2 > 1 ) t2 = 1;\n\n\t\tconst pt1 = this.getPoint( t1 );\n\t\tconst pt2 = this.getPoint( t2 );\n\n\t\tconst tangent = optionalTarget || ( ( pt1.isVector2 ) ? new Vector2() : new Vector3() );\n\n\t\ttangent.copy( pt2 ).sub( pt1 ).normalize();\n\n\t\treturn tangent;\n\n\t},\n\n\tgetTangentAt: function ( u, optionalTarget ) {\n\n\t\tconst t = this.getUtoTmapping( u );\n\t\treturn this.getTangent( t, optionalTarget );\n\n\t},\n\n\tcomputeFrenetFrames: function ( segments, closed ) {\n\n\t\t// see http://www.cs.indiana.edu/pub/techreports/TR425.pdf\n\n\t\tconst normal = new Vector3();\n\n\t\tconst tangents = [];\n\t\tconst normals = [];\n\t\tconst binormals = [];\n\n\t\tconst vec = new Vector3();\n\t\tconst mat = new Matrix4();\n\n\t\t// compute the tangent vectors for each segment on the curve\n\n\t\tfor ( let i = 0; i <= segments; i ++ ) {\n\n\t\t\tconst u = i / segments;\n\n\t\t\ttangents[ i ] = this.getTangentAt( u, new Vector3() );\n\t\t\ttangents[ i ].normalize();\n\n\t\t}\n\n\t\t// select an initial normal vector perpendicular to the first tangent vector,\n\t\t// and in the direction of the minimum tangent xyz component\n\n\t\tnormals[ 0 ] = new Vector3();\n\t\tbinormals[ 0 ] = new Vector3();\n\t\tlet min = Number.MAX_VALUE;\n\t\tconst tx = Math.abs( tangents[ 0 ].x );\n\t\tconst ty = Math.abs( tangents[ 0 ].y );\n\t\tconst tz = Math.abs( tangents[ 0 ].z );\n\n\t\tif ( tx <= min ) {\n\n\t\t\tmin = tx;\n\t\t\tnormal.set( 1, 0, 0 );\n\n\t\t}\n\n\t\tif ( ty <= min ) {\n\n\t\t\tmin = ty;\n\t\t\tnormal.set( 0, 1, 0 );\n\n\t\t}\n\n\t\tif ( tz <= min ) {\n\n\t\t\tnormal.set( 0, 0, 1 );\n\n\t\t}\n\n\t\tvec.crossVectors( tangents[ 0 ], normal ).normalize();\n\n\t\tnormals[ 0 ].crossVectors( tangents[ 0 ], vec );\n\t\tbinormals[ 0 ].crossVectors( tangents[ 0 ], normals[ 0 ] );\n\n\n\t\t// compute the slowly-varying normal and binormal vectors for each segment on the curve\n\n\t\tfor ( let i = 1; i <= segments; i ++ ) {\n\n\t\t\tnormals[ i ] = normals[ i - 1 ].clone();\n\n\t\t\tbinormals[ i ] = binormals[ i - 1 ].clone();\n\n\t\t\tvec.crossVectors( tangents[ i - 1 ], tangents[ i ] );\n\n\t\t\tif ( vec.length() > Number.EPSILON ) {\n\n\t\t\t\tvec.normalize();\n\n\t\t\t\tconst theta = Math.acos( MathUtils.clamp( tangents[ i - 1 ].dot( tangents[ i ] ), - 1, 1 ) ); // clamp for floating pt errors\n\n\t\t\t\tnormals[ i ].applyMatrix4( mat.makeRotationAxis( vec, theta ) );\n\n\t\t\t}\n\n\t\t\tbinormals[ i ].crossVectors( tangents[ i ], normals[ i ] );\n\n\t\t}\n\n\t\t// if the curve is closed, postprocess the vectors so the first and last normal vectors are the same\n\n\t\tif ( closed === true ) {\n\n\t\t\tlet theta = Math.acos( MathUtils.clamp( normals[ 0 ].dot( normals[ segments ] ), - 1, 1 ) );\n\t\t\ttheta /= segments;\n\n\t\t\tif ( tangents[ 0 ].dot( vec.crossVectors( normals[ 0 ], normals[ segments ] ) ) > 0 ) {\n\n\t\t\t\ttheta = - theta;\n\n\t\t\t}\n\n\t\t\tfor ( let i = 1; i <= segments; i ++ ) {\n\n\t\t\t\t// twist a little...\n\t\t\t\tnormals[ i ].applyMatrix4( mat.makeRotationAxis( tangents[ i ], theta * i ) );\n\t\t\t\tbinormals[ i ].crossVectors( tangents[ i ], normals[ i ] );\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn {\n\t\t\ttangents: tangents,\n\t\t\tnormals: normals,\n\t\t\tbinormals: binormals\n\t\t};\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor().copy( this );\n\n\t},\n\n\tcopy: function ( source ) {\n\n\t\tthis.arcLengthDivisions = source.arcLengthDivisions;\n\n\t\treturn this;\n\n\t},\n\n\ttoJSON: function () {\n\n\t\tconst data = {\n\t\t\tmetadata: {\n\t\t\t\tversion: 4.5,\n\t\t\t\ttype: 'Curve',\n\t\t\t\tgenerator: 'Curve.toJSON'\n\t\t\t}\n\t\t};\n\n\t\tdata.arcLengthDivisions = this.arcLengthDivisions;\n\t\tdata.type = this.type;\n\n\t\treturn data;\n\n\t},\n\n\tfromJSON: function ( json ) {\n\n\t\tthis.arcLengthDivisions = json.arcLengthDivisions;\n\n\t\treturn this;\n\n\t}\n\n} );\n\nfunction EllipseCurve( aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation ) {\n\n\tCurve.call( this );\n\n\tthis.type = 'EllipseCurve';\n\n\tthis.aX = aX || 0;\n\tthis.aY = aY || 0;\n\n\tthis.xRadius = xRadius || 1;\n\tthis.yRadius = yRadius || 1;\n\n\tthis.aStartAngle = aStartAngle || 0;\n\tthis.aEndAngle = aEndAngle || 2 * Math.PI;\n\n\tthis.aClockwise = aClockwise || false;\n\n\tthis.aRotation = aRotation || 0;\n\n}\n\nEllipseCurve.prototype = Object.create( Curve.prototype );\nEllipseCurve.prototype.constructor = EllipseCurve;\n\nEllipseCurve.prototype.isEllipseCurve = true;\n\nEllipseCurve.prototype.getPoint = function ( t, optionalTarget ) {\n\n\tconst point = optionalTarget || new Vector2();\n\n\tconst twoPi = Math.PI * 2;\n\tlet deltaAngle = this.aEndAngle - this.aStartAngle;\n\tconst samePoints = Math.abs( deltaAngle ) < Number.EPSILON;\n\n\t// ensures that deltaAngle is 0 .. 2 PI\n\twhile ( deltaAngle < 0 ) deltaAngle += twoPi;\n\twhile ( deltaAngle > twoPi ) deltaAngle -= twoPi;\n\n\tif ( deltaAngle < Number.EPSILON ) {\n\n\t\tif ( samePoints ) {\n\n\t\t\tdeltaAngle = 0;\n\n\t\t} else {\n\n\t\t\tdeltaAngle = twoPi;\n\n\t\t}\n\n\t}\n\n\tif ( this.aClockwise === true && ! samePoints ) {\n\n\t\tif ( deltaAngle === twoPi ) {\n\n\t\t\tdeltaAngle = - twoPi;\n\n\t\t} else {\n\n\t\t\tdeltaAngle = deltaAngle - twoPi;\n\n\t\t}\n\n\t}\n\n\tconst angle = this.aStartAngle + t * deltaAngle;\n\tlet x = this.aX + this.xRadius * Math.cos( angle );\n\tlet y = this.aY + this.yRadius * Math.sin( angle );\n\n\tif ( this.aRotation !== 0 ) {\n\n\t\tconst cos = Math.cos( this.aRotation );\n\t\tconst sin = Math.sin( this.aRotation );\n\n\t\tconst tx = x - this.aX;\n\t\tconst ty = y - this.aY;\n\n\t\t// Rotate the point about the center of the ellipse.\n\t\tx = tx * cos - ty * sin + this.aX;\n\t\ty = tx * sin + ty * cos + this.aY;\n\n\t}\n\n\treturn point.set( x, y );\n\n};\n\nEllipseCurve.prototype.copy = function ( source ) {\n\n\tCurve.prototype.copy.call( this, source );\n\n\tthis.aX = source.aX;\n\tthis.aY = source.aY;\n\n\tthis.xRadius = source.xRadius;\n\tthis.yRadius = source.yRadius;\n\n\tthis.aStartAngle = source.aStartAngle;\n\tthis.aEndAngle = source.aEndAngle;\n\n\tthis.aClockwise = source.aClockwise;\n\n\tthis.aRotation = source.aRotation;\n\n\treturn this;\n\n};\n\n\nEllipseCurve.prototype.toJSON = function () {\n\n\tconst data = Curve.prototype.toJSON.call( this );\n\n\tdata.aX = this.aX;\n\tdata.aY = this.aY;\n\n\tdata.xRadius = this.xRadius;\n\tdata.yRadius = this.yRadius;\n\n\tdata.aStartAngle = this.aStartAngle;\n\tdata.aEndAngle = this.aEndAngle;\n\n\tdata.aClockwise = this.aClockwise;\n\n\tdata.aRotation = this.aRotation;\n\n\treturn data;\n\n};\n\nEllipseCurve.prototype.fromJSON = function ( json ) {\n\n\tCurve.prototype.fromJSON.call( this, json );\n\n\tthis.aX = json.aX;\n\tthis.aY = json.aY;\n\n\tthis.xRadius = json.xRadius;\n\tthis.yRadius = json.yRadius;\n\n\tthis.aStartAngle = json.aStartAngle;\n\tthis.aEndAngle = json.aEndAngle;\n\n\tthis.aClockwise = json.aClockwise;\n\n\tthis.aRotation = json.aRotation;\n\n\treturn this;\n\n};\n\nfunction ArcCurve( aX, aY, aRadius, aStartAngle, aEndAngle, aClockwise ) {\n\n\tEllipseCurve.call( this, aX, aY, aRadius, aRadius, aStartAngle, aEndAngle, aClockwise );\n\n\tthis.type = 'ArcCurve';\n\n}\n\nArcCurve.prototype = Object.create( EllipseCurve.prototype );\nArcCurve.prototype.constructor = ArcCurve;\n\nArcCurve.prototype.isArcCurve = true;\n\n/**\n * Centripetal CatmullRom Curve - which is useful for avoiding\n * cusps and self-intersections in non-uniform catmull rom curves.\n * http://www.cemyuksel.com/research/catmullrom_param/catmullrom.pdf\n *\n * curve.type accepts centripetal(default), chordal and catmullrom\n * curve.tension is used for catmullrom which defaults to 0.5\n */\n\n\n/*\nBased on an optimized c++ solution in\n - http://stackoverflow.com/questions/9489736/catmull-rom-curve-with-no-cusps-and-no-self-intersections/\n - http://ideone.com/NoEbVM\n\nThis CubicPoly class could be used for reusing some variables and calculations,\nbut for three.js curve use, it could be possible inlined and flatten into a single function call\nwhich can be placed in CurveUtils.\n*/\n\nfunction CubicPoly() {\n\n\tlet c0 = 0, c1 = 0, c2 = 0, c3 = 0;\n\n\t/*\n\t * Compute coefficients for a cubic polynomial\n\t *   p(s) = c0 + c1*s + c2*s^2 + c3*s^3\n\t * such that\n\t *   p(0) = x0, p(1) = x1\n\t *  and\n\t *   p'(0) = t0, p'(1) = t1.\n\t */\n\tfunction init( x0, x1, t0, t1 ) {\n\n\t\tc0 = x0;\n\t\tc1 = t0;\n\t\tc2 = - 3 * x0 + 3 * x1 - 2 * t0 - t1;\n\t\tc3 = 2 * x0 - 2 * x1 + t0 + t1;\n\n\t}\n\n\treturn {\n\n\t\tinitCatmullRom: function ( x0, x1, x2, x3, tension ) {\n\n\t\t\tinit( x1, x2, tension * ( x2 - x0 ), tension * ( x3 - x1 ) );\n\n\t\t},\n\n\t\tinitNonuniformCatmullRom: function ( x0, x1, x2, x3, dt0, dt1, dt2 ) {\n\n\t\t\t// compute tangents when parameterized in [t1,t2]\n\t\t\tlet t1 = ( x1 - x0 ) / dt0 - ( x2 - x0 ) / ( dt0 + dt1 ) + ( x2 - x1 ) / dt1;\n\t\t\tlet t2 = ( x2 - x1 ) / dt1 - ( x3 - x1 ) / ( dt1 + dt2 ) + ( x3 - x2 ) / dt2;\n\n\t\t\t// rescale tangents for parametrization in [0,1]\n\t\t\tt1 *= dt1;\n\t\t\tt2 *= dt1;\n\n\t\t\tinit( x1, x2, t1, t2 );\n\n\t\t},\n\n\t\tcalc: function ( t ) {\n\n\t\t\tconst t2 = t * t;\n\t\t\tconst t3 = t2 * t;\n\t\t\treturn c0 + c1 * t + c2 * t2 + c3 * t3;\n\n\t\t}\n\n\t};\n\n}\n\n//\n\nconst tmp = new Vector3();\nconst px = new CubicPoly(), py = new CubicPoly(), pz = new CubicPoly();\n\nfunction CatmullRomCurve3( points = [], closed = false, curveType = 'centripetal', tension = 0.5 ) {\n\n\tCurve.call( this );\n\n\tthis.type = 'CatmullRomCurve3';\n\n\tthis.points = points;\n\tthis.closed = closed;\n\tthis.curveType = curveType;\n\tthis.tension = tension;\n\n}\n\nCatmullRomCurve3.prototype = Object.create( Curve.prototype );\nCatmullRomCurve3.prototype.constructor = CatmullRomCurve3;\n\nCatmullRomCurve3.prototype.isCatmullRomCurve3 = true;\n\nCatmullRomCurve3.prototype.getPoint = function ( t, optionalTarget = new Vector3() ) {\n\n\tconst point = optionalTarget;\n\n\tconst points = this.points;\n\tconst l = points.length;\n\n\tconst p = ( l - ( this.closed ? 0 : 1 ) ) * t;\n\tlet intPoint = Math.floor( p );\n\tlet weight = p - intPoint;\n\n\tif ( this.closed ) {\n\n\t\tintPoint += intPoint > 0 ? 0 : ( Math.floor( Math.abs( intPoint ) / l ) + 1 ) * l;\n\n\t} else if ( weight === 0 && intPoint === l - 1 ) {\n\n\t\tintPoint = l - 2;\n\t\tweight = 1;\n\n\t}\n\n\tlet p0, p3; // 4 points (p1 & p2 defined below)\n\n\tif ( this.closed || intPoint > 0 ) {\n\n\t\tp0 = points[ ( intPoint - 1 ) % l ];\n\n\t} else {\n\n\t\t// extrapolate first point\n\t\ttmp.subVectors( points[ 0 ], points[ 1 ] ).add( points[ 0 ] );\n\t\tp0 = tmp;\n\n\t}\n\n\tconst p1 = points[ intPoint % l ];\n\tconst p2 = points[ ( intPoint + 1 ) % l ];\n\n\tif ( this.closed || intPoint + 2 < l ) {\n\n\t\tp3 = points[ ( intPoint + 2 ) % l ];\n\n\t} else {\n\n\t\t// extrapolate last point\n\t\ttmp.subVectors( points[ l - 1 ], points[ l - 2 ] ).add( points[ l - 1 ] );\n\t\tp3 = tmp;\n\n\t}\n\n\tif ( this.curveType === 'centripetal' || this.curveType === 'chordal' ) {\n\n\t\t// init Centripetal / Chordal Catmull-Rom\n\t\tconst pow = this.curveType === 'chordal' ? 0.5 : 0.25;\n\t\tlet dt0 = Math.pow( p0.distanceToSquared( p1 ), pow );\n\t\tlet dt1 = Math.pow( p1.distanceToSquared( p2 ), pow );\n\t\tlet dt2 = Math.pow( p2.distanceToSquared( p3 ), pow );\n\n\t\t// safety check for repeated points\n\t\tif ( dt1 < 1e-4 ) dt1 = 1.0;\n\t\tif ( dt0 < 1e-4 ) dt0 = dt1;\n\t\tif ( dt2 < 1e-4 ) dt2 = dt1;\n\n\t\tpx.initNonuniformCatmullRom( p0.x, p1.x, p2.x, p3.x, dt0, dt1, dt2 );\n\t\tpy.initNonuniformCatmullRom( p0.y, p1.y, p2.y, p3.y, dt0, dt1, dt2 );\n\t\tpz.initNonuniformCatmullRom( p0.z, p1.z, p2.z, p3.z, dt0, dt1, dt2 );\n\n\t} else if ( this.curveType === 'catmullrom' ) {\n\n\t\tpx.initCatmullRom( p0.x, p1.x, p2.x, p3.x, this.tension );\n\t\tpy.initCatmullRom( p0.y, p1.y, p2.y, p3.y, this.tension );\n\t\tpz.initCatmullRom( p0.z, p1.z, p2.z, p3.z, this.tension );\n\n\t}\n\n\tpoint.set(\n\t\tpx.calc( weight ),\n\t\tpy.calc( weight ),\n\t\tpz.calc( weight )\n\t);\n\n\treturn point;\n\n};\n\nCatmullRomCurve3.prototype.copy = function ( source ) {\n\n\tCurve.prototype.copy.call( this, source );\n\n\tthis.points = [];\n\n\tfor ( let i = 0, l = source.points.length; i < l; i ++ ) {\n\n\t\tconst point = source.points[ i ];\n\n\t\tthis.points.push( point.clone() );\n\n\t}\n\n\tthis.closed = source.closed;\n\tthis.curveType = source.curveType;\n\tthis.tension = source.tension;\n\n\treturn this;\n\n};\n\nCatmullRomCurve3.prototype.toJSON = function () {\n\n\tconst data = Curve.prototype.toJSON.call( this );\n\n\tdata.points = [];\n\n\tfor ( let i = 0, l = this.points.length; i < l; i ++ ) {\n\n\t\tconst point = this.points[ i ];\n\t\tdata.points.push( point.toArray() );\n\n\t}\n\n\tdata.closed = this.closed;\n\tdata.curveType = this.curveType;\n\tdata.tension = this.tension;\n\n\treturn data;\n\n};\n\nCatmullRomCurve3.prototype.fromJSON = function ( json ) {\n\n\tCurve.prototype.fromJSON.call( this, json );\n\n\tthis.points = [];\n\n\tfor ( let i = 0, l = json.points.length; i < l; i ++ ) {\n\n\t\tconst point = json.points[ i ];\n\t\tthis.points.push( new Vector3().fromArray( point ) );\n\n\t}\n\n\tthis.closed = json.closed;\n\tthis.curveType = json.curveType;\n\tthis.tension = json.tension;\n\n\treturn this;\n\n};\n\n/**\n * Bezier Curves formulas obtained from\n * http://en.wikipedia.org/wiki/Bézier_curve\n */\n\nfunction CatmullRom( t, p0, p1, p2, p3 ) {\n\n\tconst v0 = ( p2 - p0 ) * 0.5;\n\tconst v1 = ( p3 - p1 ) * 0.5;\n\tconst t2 = t * t;\n\tconst t3 = t * t2;\n\treturn ( 2 * p1 - 2 * p2 + v0 + v1 ) * t3 + ( - 3 * p1 + 3 * p2 - 2 * v0 - v1 ) * t2 + v0 * t + p1;\n\n}\n\n//\n\nfunction QuadraticBezierP0( t, p ) {\n\n\tconst k = 1 - t;\n\treturn k * k * p;\n\n}\n\nfunction QuadraticBezierP1( t, p ) {\n\n\treturn 2 * ( 1 - t ) * t * p;\n\n}\n\nfunction QuadraticBezierP2( t, p ) {\n\n\treturn t * t * p;\n\n}\n\nfunction QuadraticBezier( t, p0, p1, p2 ) {\n\n\treturn QuadraticBezierP0( t, p0 ) + QuadraticBezierP1( t, p1 ) +\n\t\tQuadraticBezierP2( t, p2 );\n\n}\n\n//\n\nfunction CubicBezierP0( t, p ) {\n\n\tconst k = 1 - t;\n\treturn k * k * k * p;\n\n}\n\nfunction CubicBezierP1( t, p ) {\n\n\tconst k = 1 - t;\n\treturn 3 * k * k * t * p;\n\n}\n\nfunction CubicBezierP2( t, p ) {\n\n\treturn 3 * ( 1 - t ) * t * t * p;\n\n}\n\nfunction CubicBezierP3( t, p ) {\n\n\treturn t * t * t * p;\n\n}\n\nfunction CubicBezier( t, p0, p1, p2, p3 ) {\n\n\treturn CubicBezierP0( t, p0 ) + CubicBezierP1( t, p1 ) + CubicBezierP2( t, p2 ) +\n\t\tCubicBezierP3( t, p3 );\n\n}\n\nfunction CubicBezierCurve( v0 = new Vector2(), v1 = new Vector2(), v2 = new Vector2(), v3 = new Vector2() ) {\n\n\tCurve.call( this );\n\n\tthis.type = 'CubicBezierCurve';\n\n\tthis.v0 = v0;\n\tthis.v1 = v1;\n\tthis.v2 = v2;\n\tthis.v3 = v3;\n\n}\n\nCubicBezierCurve.prototype = Object.create( Curve.prototype );\nCubicBezierCurve.prototype.constructor = CubicBezierCurve;\n\nCubicBezierCurve.prototype.isCubicBezierCurve = true;\n\nCubicBezierCurve.prototype.getPoint = function ( t, optionalTarget = new Vector2() ) {\n\n\tconst point = optionalTarget;\n\n\tconst v0 = this.v0, v1 = this.v1, v2 = this.v2, v3 = this.v3;\n\n\tpoint.set(\n\t\tCubicBezier( t, v0.x, v1.x, v2.x, v3.x ),\n\t\tCubicBezier( t, v0.y, v1.y, v2.y, v3.y )\n\t);\n\n\treturn point;\n\n};\n\nCubicBezierCurve.prototype.copy = function ( source ) {\n\n\tCurve.prototype.copy.call( this, source );\n\n\tthis.v0.copy( source.v0 );\n\tthis.v1.copy( source.v1 );\n\tthis.v2.copy( source.v2 );\n\tthis.v3.copy( source.v3 );\n\n\treturn this;\n\n};\n\nCubicBezierCurve.prototype.toJSON = function () {\n\n\tconst data = Curve.prototype.toJSON.call( this );\n\n\tdata.v0 = this.v0.toArray();\n\tdata.v1 = this.v1.toArray();\n\tdata.v2 = this.v2.toArray();\n\tdata.v3 = this.v3.toArray();\n\n\treturn data;\n\n};\n\nCubicBezierCurve.prototype.fromJSON = function ( json ) {\n\n\tCurve.prototype.fromJSON.call( this, json );\n\n\tthis.v0.fromArray( json.v0 );\n\tthis.v1.fromArray( json.v1 );\n\tthis.v2.fromArray( json.v2 );\n\tthis.v3.fromArray( json.v3 );\n\n\treturn this;\n\n};\n\nfunction CubicBezierCurve3( v0 = new Vector3(), v1 = new Vector3(), v2 = new Vector3(), v3 = new Vector3() ) {\n\n\tCurve.call( this );\n\n\tthis.type = 'CubicBezierCurve3';\n\n\tthis.v0 = v0;\n\tthis.v1 = v1;\n\tthis.v2 = v2;\n\tthis.v3 = v3;\n\n}\n\nCubicBezierCurve3.prototype = Object.create( Curve.prototype );\nCubicBezierCurve3.prototype.constructor = CubicBezierCurve3;\n\nCubicBezierCurve3.prototype.isCubicBezierCurve3 = true;\n\nCubicBezierCurve3.prototype.getPoint = function ( t, optionalTarget = new Vector3() ) {\n\n\tconst point = optionalTarget;\n\n\tconst v0 = this.v0, v1 = this.v1, v2 = this.v2, v3 = this.v3;\n\n\tpoint.set(\n\t\tCubicBezier( t, v0.x, v1.x, v2.x, v3.x ),\n\t\tCubicBezier( t, v0.y, v1.y, v2.y, v3.y ),\n\t\tCubicBezier( t, v0.z, v1.z, v2.z, v3.z )\n\t);\n\n\treturn point;\n\n};\n\nCubicBezierCurve3.prototype.copy = function ( source ) {\n\n\tCurve.prototype.copy.call( this, source );\n\n\tthis.v0.copy( source.v0 );\n\tthis.v1.copy( source.v1 );\n\tthis.v2.copy( source.v2 );\n\tthis.v3.copy( source.v3 );\n\n\treturn this;\n\n};\n\nCubicBezierCurve3.prototype.toJSON = function () {\n\n\tconst data = Curve.prototype.toJSON.call( this );\n\n\tdata.v0 = this.v0.toArray();\n\tdata.v1 = this.v1.toArray();\n\tdata.v2 = this.v2.toArray();\n\tdata.v3 = this.v3.toArray();\n\n\treturn data;\n\n};\n\nCubicBezierCurve3.prototype.fromJSON = function ( json ) {\n\n\tCurve.prototype.fromJSON.call( this, json );\n\n\tthis.v0.fromArray( json.v0 );\n\tthis.v1.fromArray( json.v1 );\n\tthis.v2.fromArray( json.v2 );\n\tthis.v3.fromArray( json.v3 );\n\n\treturn this;\n\n};\n\nfunction LineCurve( v1 = new Vector2(), v2 = new Vector2() ) {\n\n\tCurve.call( this );\n\n\tthis.type = 'LineCurve';\n\n\tthis.v1 = v1;\n\tthis.v2 = v2;\n\n}\n\nLineCurve.prototype = Object.create( Curve.prototype );\nLineCurve.prototype.constructor = LineCurve;\n\nLineCurve.prototype.isLineCurve = true;\n\nLineCurve.prototype.getPoint = function ( t, optionalTarget = new Vector2() ) {\n\n\tconst point = optionalTarget;\n\n\tif ( t === 1 ) {\n\n\t\tpoint.copy( this.v2 );\n\n\t} else {\n\n\t\tpoint.copy( this.v2 ).sub( this.v1 );\n\t\tpoint.multiplyScalar( t ).add( this.v1 );\n\n\t}\n\n\treturn point;\n\n};\n\n// Line curve is linear, so we can overwrite default getPointAt\n\nLineCurve.prototype.getPointAt = function ( u, optionalTarget ) {\n\n\treturn this.getPoint( u, optionalTarget );\n\n};\n\nLineCurve.prototype.getTangent = function ( t, optionalTarget ) {\n\n\tconst tangent = optionalTarget || new Vector2();\n\n\ttangent.copy( this.v2 ).sub( this.v1 ).normalize();\n\n\treturn tangent;\n\n};\n\nLineCurve.prototype.copy = function ( source ) {\n\n\tCurve.prototype.copy.call( this, source );\n\n\tthis.v1.copy( source.v1 );\n\tthis.v2.copy( source.v2 );\n\n\treturn this;\n\n};\n\nLineCurve.prototype.toJSON = function () {\n\n\tconst data = Curve.prototype.toJSON.call( this );\n\n\tdata.v1 = this.v1.toArray();\n\tdata.v2 = this.v2.toArray();\n\n\treturn data;\n\n};\n\nLineCurve.prototype.fromJSON = function ( json ) {\n\n\tCurve.prototype.fromJSON.call( this, json );\n\n\tthis.v1.fromArray( json.v1 );\n\tthis.v2.fromArray( json.v2 );\n\n\treturn this;\n\n};\n\nfunction LineCurve3( v1 = new Vector3(), v2 = new Vector3() ) {\n\n\tCurve.call( this );\n\n\tthis.type = 'LineCurve3';\n\n\tthis.v1 = v1;\n\tthis.v2 = v2;\n\n}\n\nLineCurve3.prototype = Object.create( Curve.prototype );\nLineCurve3.prototype.constructor = LineCurve3;\n\nLineCurve3.prototype.isLineCurve3 = true;\n\nLineCurve3.prototype.getPoint = function ( t, optionalTarget = new Vector3() ) {\n\n\tconst point = optionalTarget;\n\n\tif ( t === 1 ) {\n\n\t\tpoint.copy( this.v2 );\n\n\t} else {\n\n\t\tpoint.copy( this.v2 ).sub( this.v1 );\n\t\tpoint.multiplyScalar( t ).add( this.v1 );\n\n\t}\n\n\treturn point;\n\n};\n\n// Line curve is linear, so we can overwrite default getPointAt\n\nLineCurve3.prototype.getPointAt = function ( u, optionalTarget ) {\n\n\treturn this.getPoint( u, optionalTarget );\n\n};\n\nLineCurve3.prototype.copy = function ( source ) {\n\n\tCurve.prototype.copy.call( this, source );\n\n\tthis.v1.copy( source.v1 );\n\tthis.v2.copy( source.v2 );\n\n\treturn this;\n\n};\n\nLineCurve3.prototype.toJSON = function () {\n\n\tconst data = Curve.prototype.toJSON.call( this );\n\n\tdata.v1 = this.v1.toArray();\n\tdata.v2 = this.v2.toArray();\n\n\treturn data;\n\n};\n\nLineCurve3.prototype.fromJSON = function ( json ) {\n\n\tCurve.prototype.fromJSON.call( this, json );\n\n\tthis.v1.fromArray( json.v1 );\n\tthis.v2.fromArray( json.v2 );\n\n\treturn this;\n\n};\n\nfunction QuadraticBezierCurve( v0 = new Vector2(), v1 = new Vector2(), v2 = new Vector2() ) {\n\n\tCurve.call( this );\n\n\tthis.type = 'QuadraticBezierCurve';\n\n\tthis.v0 = v0;\n\tthis.v1 = v1;\n\tthis.v2 = v2;\n\n}\n\nQuadraticBezierCurve.prototype = Object.create( Curve.prototype );\nQuadraticBezierCurve.prototype.constructor = QuadraticBezierCurve;\n\nQuadraticBezierCurve.prototype.isQuadraticBezierCurve = true;\n\nQuadraticBezierCurve.prototype.getPoint = function ( t, optionalTarget = new Vector2() ) {\n\n\tconst point = optionalTarget;\n\n\tconst v0 = this.v0, v1 = this.v1, v2 = this.v2;\n\n\tpoint.set(\n\t\tQuadraticBezier( t, v0.x, v1.x, v2.x ),\n\t\tQuadraticBezier( t, v0.y, v1.y, v2.y )\n\t);\n\n\treturn point;\n\n};\n\nQuadraticBezierCurve.prototype.copy = function ( source ) {\n\n\tCurve.prototype.copy.call( this, source );\n\n\tthis.v0.copy( source.v0 );\n\tthis.v1.copy( source.v1 );\n\tthis.v2.copy( source.v2 );\n\n\treturn this;\n\n};\n\nQuadraticBezierCurve.prototype.toJSON = function () {\n\n\tconst data = Curve.prototype.toJSON.call( this );\n\n\tdata.v0 = this.v0.toArray();\n\tdata.v1 = this.v1.toArray();\n\tdata.v2 = this.v2.toArray();\n\n\treturn data;\n\n};\n\nQuadraticBezierCurve.prototype.fromJSON = function ( json ) {\n\n\tCurve.prototype.fromJSON.call( this, json );\n\n\tthis.v0.fromArray( json.v0 );\n\tthis.v1.fromArray( json.v1 );\n\tthis.v2.fromArray( json.v2 );\n\n\treturn this;\n\n};\n\nfunction QuadraticBezierCurve3( v0 = new Vector3(), v1 = new Vector3(), v2 = new Vector3() ) {\n\n\tCurve.call( this );\n\n\tthis.type = 'QuadraticBezierCurve3';\n\n\tthis.v0 = v0;\n\tthis.v1 = v1;\n\tthis.v2 = v2;\n\n}\n\nQuadraticBezierCurve3.prototype = Object.create( Curve.prototype );\nQuadraticBezierCurve3.prototype.constructor = QuadraticBezierCurve3;\n\nQuadraticBezierCurve3.prototype.isQuadraticBezierCurve3 = true;\n\nQuadraticBezierCurve3.prototype.getPoint = function ( t, optionalTarget = new Vector3() ) {\n\n\tconst point = optionalTarget;\n\n\tconst v0 = this.v0, v1 = this.v1, v2 = this.v2;\n\n\tpoint.set(\n\t\tQuadraticBezier( t, v0.x, v1.x, v2.x ),\n\t\tQuadraticBezier( t, v0.y, v1.y, v2.y ),\n\t\tQuadraticBezier( t, v0.z, v1.z, v2.z )\n\t);\n\n\treturn point;\n\n};\n\nQuadraticBezierCurve3.prototype.copy = function ( source ) {\n\n\tCurve.prototype.copy.call( this, source );\n\n\tthis.v0.copy( source.v0 );\n\tthis.v1.copy( source.v1 );\n\tthis.v2.copy( source.v2 );\n\n\treturn this;\n\n};\n\nQuadraticBezierCurve3.prototype.toJSON = function () {\n\n\tconst data = Curve.prototype.toJSON.call( this );\n\n\tdata.v0 = this.v0.toArray();\n\tdata.v1 = this.v1.toArray();\n\tdata.v2 = this.v2.toArray();\n\n\treturn data;\n\n};\n\nQuadraticBezierCurve3.prototype.fromJSON = function ( json ) {\n\n\tCurve.prototype.fromJSON.call( this, json );\n\n\tthis.v0.fromArray( json.v0 );\n\tthis.v1.fromArray( json.v1 );\n\tthis.v2.fromArray( json.v2 );\n\n\treturn this;\n\n};\n\nfunction SplineCurve( points = [] ) {\n\n\tCurve.call( this );\n\n\tthis.type = 'SplineCurve';\n\n\tthis.points = points;\n\n}\n\nSplineCurve.prototype = Object.create( Curve.prototype );\nSplineCurve.prototype.constructor = SplineCurve;\n\nSplineCurve.prototype.isSplineCurve = true;\n\nSplineCurve.prototype.getPoint = function ( t, optionalTarget = new Vector2() ) {\n\n\tconst point = optionalTarget;\n\n\tconst points = this.points;\n\tconst p = ( points.length - 1 ) * t;\n\n\tconst intPoint = Math.floor( p );\n\tconst weight = p - intPoint;\n\n\tconst p0 = points[ intPoint === 0 ? intPoint : intPoint - 1 ];\n\tconst p1 = points[ intPoint ];\n\tconst p2 = points[ intPoint > points.length - 2 ? points.length - 1 : intPoint + 1 ];\n\tconst p3 = points[ intPoint > points.length - 3 ? points.length - 1 : intPoint + 2 ];\n\n\tpoint.set(\n\t\tCatmullRom( weight, p0.x, p1.x, p2.x, p3.x ),\n\t\tCatmullRom( weight, p0.y, p1.y, p2.y, p3.y )\n\t);\n\n\treturn point;\n\n};\n\nSplineCurve.prototype.copy = function ( source ) {\n\n\tCurve.prototype.copy.call( this, source );\n\n\tthis.points = [];\n\n\tfor ( let i = 0, l = source.points.length; i < l; i ++ ) {\n\n\t\tconst point = source.points[ i ];\n\n\t\tthis.points.push( point.clone() );\n\n\t}\n\n\treturn this;\n\n};\n\nSplineCurve.prototype.toJSON = function () {\n\n\tconst data = Curve.prototype.toJSON.call( this );\n\n\tdata.points = [];\n\n\tfor ( let i = 0, l = this.points.length; i < l; i ++ ) {\n\n\t\tconst point = this.points[ i ];\n\t\tdata.points.push( point.toArray() );\n\n\t}\n\n\treturn data;\n\n};\n\nSplineCurve.prototype.fromJSON = function ( json ) {\n\n\tCurve.prototype.fromJSON.call( this, json );\n\n\tthis.points = [];\n\n\tfor ( let i = 0, l = json.points.length; i < l; i ++ ) {\n\n\t\tconst point = json.points[ i ];\n\t\tthis.points.push( new Vector2().fromArray( point ) );\n\n\t}\n\n\treturn this;\n\n};\n\nvar Curves = /*#__PURE__*/Object.freeze({\n\t__proto__: null,\n\tArcCurve: ArcCurve,\n\tCatmullRomCurve3: CatmullRomCurve3,\n\tCubicBezierCurve: CubicBezierCurve,\n\tCubicBezierCurve3: CubicBezierCurve3,\n\tEllipseCurve: EllipseCurve,\n\tLineCurve: LineCurve,\n\tLineCurve3: LineCurve3,\n\tQuadraticBezierCurve: QuadraticBezierCurve,\n\tQuadraticBezierCurve3: QuadraticBezierCurve3,\n\tSplineCurve: SplineCurve\n});\n\n/**************************************************************\n *\tCurved Path - a curve path is simply a array of connected\n *  curves, but retains the api of a curve\n **************************************************************/\n\nfunction CurvePath() {\n\n\tCurve.call( this );\n\n\tthis.type = 'CurvePath';\n\n\tthis.curves = [];\n\tthis.autoClose = false; // Automatically closes the path\n\n}\n\nCurvePath.prototype = Object.assign( Object.create( Curve.prototype ), {\n\n\tconstructor: CurvePath,\n\n\tadd: function ( curve ) {\n\n\t\tthis.curves.push( curve );\n\n\t},\n\n\tclosePath: function () {\n\n\t\t// Add a line curve if start and end of lines are not connected\n\t\tconst startPoint = this.curves[ 0 ].getPoint( 0 );\n\t\tconst endPoint = this.curves[ this.curves.length - 1 ].getPoint( 1 );\n\n\t\tif ( ! startPoint.equals( endPoint ) ) {\n\n\t\t\tthis.curves.push( new LineCurve( endPoint, startPoint ) );\n\n\t\t}\n\n\t},\n\n\t// To get accurate point with reference to\n\t// entire path distance at time t,\n\t// following has to be done:\n\n\t// 1. Length of each sub path have to be known\n\t// 2. Locate and identify type of curve\n\t// 3. Get t for the curve\n\t// 4. Return curve.getPointAt(t')\n\n\tgetPoint: function ( t ) {\n\n\t\tconst d = t * this.getLength();\n\t\tconst curveLengths = this.getCurveLengths();\n\t\tlet i = 0;\n\n\t\t// To think about boundaries points.\n\n\t\twhile ( i < curveLengths.length ) {\n\n\t\t\tif ( curveLengths[ i ] >= d ) {\n\n\t\t\t\tconst diff = curveLengths[ i ] - d;\n\t\t\t\tconst curve = this.curves[ i ];\n\n\t\t\t\tconst segmentLength = curve.getLength();\n\t\t\t\tconst u = segmentLength === 0 ? 0 : 1 - diff / segmentLength;\n\n\t\t\t\treturn curve.getPointAt( u );\n\n\t\t\t}\n\n\t\t\ti ++;\n\n\t\t}\n\n\t\treturn null;\n\n\t\t// loop where sum != 0, sum > d , sum+1 <d\n\n\t},\n\n\t// We cannot use the default THREE.Curve getPoint() with getLength() because in\n\t// THREE.Curve, getLength() depends on getPoint() but in THREE.CurvePath\n\t// getPoint() depends on getLength\n\n\tgetLength: function () {\n\n\t\tconst lens = this.getCurveLengths();\n\t\treturn lens[ lens.length - 1 ];\n\n\t},\n\n\t// cacheLengths must be recalculated.\n\tupdateArcLengths: function () {\n\n\t\tthis.needsUpdate = true;\n\t\tthis.cacheLengths = null;\n\t\tthis.getCurveLengths();\n\n\t},\n\n\t// Compute lengths and cache them\n\t// We cannot overwrite getLengths() because UtoT mapping uses it.\n\n\tgetCurveLengths: function () {\n\n\t\t// We use cache values if curves and cache array are same length\n\n\t\tif ( this.cacheLengths && this.cacheLengths.length === this.curves.length ) {\n\n\t\t\treturn this.cacheLengths;\n\n\t\t}\n\n\t\t// Get length of sub-curve\n\t\t// Push sums into cached array\n\n\t\tconst lengths = [];\n\t\tlet sums = 0;\n\n\t\tfor ( let i = 0, l = this.curves.length; i < l; i ++ ) {\n\n\t\t\tsums += this.curves[ i ].getLength();\n\t\t\tlengths.push( sums );\n\n\t\t}\n\n\t\tthis.cacheLengths = lengths;\n\n\t\treturn lengths;\n\n\t},\n\n\tgetSpacedPoints: function ( divisions = 40 ) {\n\n\t\tconst points = [];\n\n\t\tfor ( let i = 0; i <= divisions; i ++ ) {\n\n\t\t\tpoints.push( this.getPoint( i / divisions ) );\n\n\t\t}\n\n\t\tif ( this.autoClose ) {\n\n\t\t\tpoints.push( points[ 0 ] );\n\n\t\t}\n\n\t\treturn points;\n\n\t},\n\n\tgetPoints: function ( divisions = 12 ) {\n\n\t\tconst points = [];\n\t\tlet last;\n\n\t\tfor ( let i = 0, curves = this.curves; i < curves.length; i ++ ) {\n\n\t\t\tconst curve = curves[ i ];\n\t\t\tconst resolution = ( curve && curve.isEllipseCurve ) ? divisions * 2\n\t\t\t\t: ( curve && ( curve.isLineCurve || curve.isLineCurve3 ) ) ? 1\n\t\t\t\t\t: ( curve && curve.isSplineCurve ) ? divisions * curve.points.length\n\t\t\t\t\t\t: divisions;\n\n\t\t\tconst pts = curve.getPoints( resolution );\n\n\t\t\tfor ( let j = 0; j < pts.length; j ++ ) {\n\n\t\t\t\tconst point = pts[ j ];\n\n\t\t\t\tif ( last && last.equals( point ) ) continue; // ensures no consecutive points are duplicates\n\n\t\t\t\tpoints.push( point );\n\t\t\t\tlast = point;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( this.autoClose && points.length > 1 && ! points[ points.length - 1 ].equals( points[ 0 ] ) ) {\n\n\t\t\tpoints.push( points[ 0 ] );\n\n\t\t}\n\n\t\treturn points;\n\n\t},\n\n\tcopy: function ( source ) {\n\n\t\tCurve.prototype.copy.call( this, source );\n\n\t\tthis.curves = [];\n\n\t\tfor ( let i = 0, l = source.curves.length; i < l; i ++ ) {\n\n\t\t\tconst curve = source.curves[ i ];\n\n\t\t\tthis.curves.push( curve.clone() );\n\n\t\t}\n\n\t\tthis.autoClose = source.autoClose;\n\n\t\treturn this;\n\n\t},\n\n\ttoJSON: function () {\n\n\t\tconst data = Curve.prototype.toJSON.call( this );\n\n\t\tdata.autoClose = this.autoClose;\n\t\tdata.curves = [];\n\n\t\tfor ( let i = 0, l = this.curves.length; i < l; i ++ ) {\n\n\t\t\tconst curve = this.curves[ i ];\n\t\t\tdata.curves.push( curve.toJSON() );\n\n\t\t}\n\n\t\treturn data;\n\n\t},\n\n\tfromJSON: function ( json ) {\n\n\t\tCurve.prototype.fromJSON.call( this, json );\n\n\t\tthis.autoClose = json.autoClose;\n\t\tthis.curves = [];\n\n\t\tfor ( let i = 0, l = json.curves.length; i < l; i ++ ) {\n\n\t\t\tconst curve = json.curves[ i ];\n\t\t\tthis.curves.push( new Curves[ curve.type ]().fromJSON( curve ) );\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n} );\n\nfunction Path( points ) {\n\n\tCurvePath.call( this );\n\n\tthis.type = 'Path';\n\n\tthis.currentPoint = new Vector2();\n\n\tif ( points ) {\n\n\t\tthis.setFromPoints( points );\n\n\t}\n\n}\n\nPath.prototype = Object.assign( Object.create( CurvePath.prototype ), {\n\n\tconstructor: Path,\n\n\tsetFromPoints: function ( points ) {\n\n\t\tthis.moveTo( points[ 0 ].x, points[ 0 ].y );\n\n\t\tfor ( let i = 1, l = points.length; i < l; i ++ ) {\n\n\t\t\tthis.lineTo( points[ i ].x, points[ i ].y );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tmoveTo: function ( x, y ) {\n\n\t\tthis.currentPoint.set( x, y ); // TODO consider referencing vectors instead of copying?\n\n\t\treturn this;\n\n\t},\n\n\tlineTo: function ( x, y ) {\n\n\t\tconst curve = new LineCurve( this.currentPoint.clone(), new Vector2( x, y ) );\n\t\tthis.curves.push( curve );\n\n\t\tthis.currentPoint.set( x, y );\n\n\t\treturn this;\n\n\t},\n\n\tquadraticCurveTo: function ( aCPx, aCPy, aX, aY ) {\n\n\t\tconst curve = new QuadraticBezierCurve(\n\t\t\tthis.currentPoint.clone(),\n\t\t\tnew Vector2( aCPx, aCPy ),\n\t\t\tnew Vector2( aX, aY )\n\t\t);\n\n\t\tthis.curves.push( curve );\n\n\t\tthis.currentPoint.set( aX, aY );\n\n\t\treturn this;\n\n\t},\n\n\tbezierCurveTo: function ( aCP1x, aCP1y, aCP2x, aCP2y, aX, aY ) {\n\n\t\tconst curve = new CubicBezierCurve(\n\t\t\tthis.currentPoint.clone(),\n\t\t\tnew Vector2( aCP1x, aCP1y ),\n\t\t\tnew Vector2( aCP2x, aCP2y ),\n\t\t\tnew Vector2( aX, aY )\n\t\t);\n\n\t\tthis.curves.push( curve );\n\n\t\tthis.currentPoint.set( aX, aY );\n\n\t\treturn this;\n\n\t},\n\n\tsplineThru: function ( pts /*Array of Vector*/ ) {\n\n\t\tconst npts = [ this.currentPoint.clone() ].concat( pts );\n\n\t\tconst curve = new SplineCurve( npts );\n\t\tthis.curves.push( curve );\n\n\t\tthis.currentPoint.copy( pts[ pts.length - 1 ] );\n\n\t\treturn this;\n\n\t},\n\n\tarc: function ( aX, aY, aRadius, aStartAngle, aEndAngle, aClockwise ) {\n\n\t\tconst x0 = this.currentPoint.x;\n\t\tconst y0 = this.currentPoint.y;\n\n\t\tthis.absarc( aX + x0, aY + y0, aRadius,\n\t\t\taStartAngle, aEndAngle, aClockwise );\n\n\t\treturn this;\n\n\t},\n\n\tabsarc: function ( aX, aY, aRadius, aStartAngle, aEndAngle, aClockwise ) {\n\n\t\tthis.absellipse( aX, aY, aRadius, aRadius, aStartAngle, aEndAngle, aClockwise );\n\n\t\treturn this;\n\n\t},\n\n\tellipse: function ( aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation ) {\n\n\t\tconst x0 = this.currentPoint.x;\n\t\tconst y0 = this.currentPoint.y;\n\n\t\tthis.absellipse( aX + x0, aY + y0, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation );\n\n\t\treturn this;\n\n\t},\n\n\tabsellipse: function ( aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation ) {\n\n\t\tconst curve = new EllipseCurve( aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation );\n\n\t\tif ( this.curves.length > 0 ) {\n\n\t\t\t// if a previous curve is present, attempt to join\n\t\t\tconst firstPoint = curve.getPoint( 0 );\n\n\t\t\tif ( ! firstPoint.equals( this.currentPoint ) ) {\n\n\t\t\t\tthis.lineTo( firstPoint.x, firstPoint.y );\n\n\t\t\t}\n\n\t\t}\n\n\t\tthis.curves.push( curve );\n\n\t\tconst lastPoint = curve.getPoint( 1 );\n\t\tthis.currentPoint.copy( lastPoint );\n\n\t\treturn this;\n\n\t},\n\n\tcopy: function ( source ) {\n\n\t\tCurvePath.prototype.copy.call( this, source );\n\n\t\tthis.currentPoint.copy( source.currentPoint );\n\n\t\treturn this;\n\n\t},\n\n\ttoJSON: function () {\n\n\t\tconst data = CurvePath.prototype.toJSON.call( this );\n\n\t\tdata.currentPoint = this.currentPoint.toArray();\n\n\t\treturn data;\n\n\t},\n\n\tfromJSON: function ( json ) {\n\n\t\tCurvePath.prototype.fromJSON.call( this, json );\n\n\t\tthis.currentPoint.fromArray( json.currentPoint );\n\n\t\treturn this;\n\n\t}\n\n} );\n\nfunction Shape( points ) {\n\n\tPath.call( this, points );\n\n\tthis.uuid = MathUtils.generateUUID();\n\n\tthis.type = 'Shape';\n\n\tthis.holes = [];\n\n}\n\nShape.prototype = Object.assign( Object.create( Path.prototype ), {\n\n\tconstructor: Shape,\n\n\tgetPointsHoles: function ( divisions ) {\n\n\t\tconst holesPts = [];\n\n\t\tfor ( let i = 0, l = this.holes.length; i < l; i ++ ) {\n\n\t\t\tholesPts[ i ] = this.holes[ i ].getPoints( divisions );\n\n\t\t}\n\n\t\treturn holesPts;\n\n\t},\n\n\t// get points of shape and holes (keypoints based on segments parameter)\n\n\textractPoints: function ( divisions ) {\n\n\t\treturn {\n\n\t\t\tshape: this.getPoints( divisions ),\n\t\t\tholes: this.getPointsHoles( divisions )\n\n\t\t};\n\n\t},\n\n\tcopy: function ( source ) {\n\n\t\tPath.prototype.copy.call( this, source );\n\n\t\tthis.holes = [];\n\n\t\tfor ( let i = 0, l = source.holes.length; i < l; i ++ ) {\n\n\t\t\tconst hole = source.holes[ i ];\n\n\t\t\tthis.holes.push( hole.clone() );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\ttoJSON: function () {\n\n\t\tconst data = Path.prototype.toJSON.call( this );\n\n\t\tdata.uuid = this.uuid;\n\t\tdata.holes = [];\n\n\t\tfor ( let i = 0, l = this.holes.length; i < l; i ++ ) {\n\n\t\t\tconst hole = this.holes[ i ];\n\t\t\tdata.holes.push( hole.toJSON() );\n\n\t\t}\n\n\t\treturn data;\n\n\t},\n\n\tfromJSON: function ( json ) {\n\n\t\tPath.prototype.fromJSON.call( this, json );\n\n\t\tthis.uuid = json.uuid;\n\t\tthis.holes = [];\n\n\t\tfor ( let i = 0, l = json.holes.length; i < l; i ++ ) {\n\n\t\t\tconst hole = json.holes[ i ];\n\t\t\tthis.holes.push( new Path().fromJSON( hole ) );\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n} );\n\nfunction Light( color, intensity = 1 ) {\n\n\tObject3D.call( this );\n\n\tthis.type = 'Light';\n\n\tthis.color = new Color( color );\n\tthis.intensity = intensity;\n\n}\n\nLight.prototype = Object.assign( Object.create( Object3D.prototype ), {\n\n\tconstructor: Light,\n\n\tisLight: true,\n\n\tcopy: function ( source ) {\n\n\t\tObject3D.prototype.copy.call( this, source );\n\n\t\tthis.color.copy( source.color );\n\t\tthis.intensity = source.intensity;\n\n\t\treturn this;\n\n\t},\n\n\ttoJSON: function ( meta ) {\n\n\t\tconst data = Object3D.prototype.toJSON.call( this, meta );\n\n\t\tdata.object.color = this.color.getHex();\n\t\tdata.object.intensity = this.intensity;\n\n\t\tif ( this.groundColor !== undefined ) data.object.groundColor = this.groundColor.getHex();\n\n\t\tif ( this.distance !== undefined ) data.object.distance = this.distance;\n\t\tif ( this.angle !== undefined ) data.object.angle = this.angle;\n\t\tif ( this.decay !== undefined ) data.object.decay = this.decay;\n\t\tif ( this.penumbra !== undefined ) data.object.penumbra = this.penumbra;\n\n\t\tif ( this.shadow !== undefined ) data.object.shadow = this.shadow.toJSON();\n\n\t\treturn data;\n\n\t}\n\n} );\n\nfunction HemisphereLight( skyColor, groundColor, intensity ) {\n\n\tLight.call( this, skyColor, intensity );\n\n\tthis.type = 'HemisphereLight';\n\n\tthis.position.copy( Object3D.DefaultUp );\n\tthis.updateMatrix();\n\n\tthis.groundColor = new Color( groundColor );\n\n}\n\nHemisphereLight.prototype = Object.assign( Object.create( Light.prototype ), {\n\n\tconstructor: HemisphereLight,\n\n\tisHemisphereLight: true,\n\n\tcopy: function ( source ) {\n\n\t\tLight.prototype.copy.call( this, source );\n\n\t\tthis.groundColor.copy( source.groundColor );\n\n\t\treturn this;\n\n\t}\n\n} );\n\nfunction LightShadow( camera ) {\n\n\tthis.camera = camera;\n\n\tthis.bias = 0;\n\tthis.normalBias = 0;\n\tthis.radius = 1;\n\n\tthis.mapSize = new Vector2( 512, 512 );\n\n\tthis.map = null;\n\tthis.mapPass = null;\n\tthis.matrix = new Matrix4();\n\n\tthis.autoUpdate = true;\n\tthis.needsUpdate = false;\n\n\tthis._frustum = new Frustum();\n\tthis._frameExtents = new Vector2( 1, 1 );\n\n\tthis._viewportCount = 1;\n\n\tthis._viewports = [\n\n\t\tnew Vector4( 0, 0, 1, 1 )\n\n\t];\n\n}\n\nObject.assign( LightShadow.prototype, {\n\n\t_projScreenMatrix: new Matrix4(),\n\n\t_lightPositionWorld: new Vector3(),\n\n\t_lookTarget: new Vector3(),\n\n\tgetViewportCount: function () {\n\n\t\treturn this._viewportCount;\n\n\t},\n\n\tgetFrustum: function () {\n\n\t\treturn this._frustum;\n\n\t},\n\n\tupdateMatrices: function ( light ) {\n\n\t\tconst shadowCamera = this.camera,\n\t\t\tshadowMatrix = this.matrix,\n\t\t\tprojScreenMatrix = this._projScreenMatrix,\n\t\t\tlookTarget = this._lookTarget,\n\t\t\tlightPositionWorld = this._lightPositionWorld;\n\n\t\tlightPositionWorld.setFromMatrixPosition( light.matrixWorld );\n\t\tshadowCamera.position.copy( lightPositionWorld );\n\n\t\tlookTarget.setFromMatrixPosition( light.target.matrixWorld );\n\t\tshadowCamera.lookAt( lookTarget );\n\t\tshadowCamera.updateMatrixWorld();\n\n\t\tprojScreenMatrix.multiplyMatrices( shadowCamera.projectionMatrix, shadowCamera.matrixWorldInverse );\n\t\tthis._frustum.setFromProjectionMatrix( projScreenMatrix );\n\n\t\tshadowMatrix.set(\n\t\t\t0.5, 0.0, 0.0, 0.5,\n\t\t\t0.0, 0.5, 0.0, 0.5,\n\t\t\t0.0, 0.0, 0.5, 0.5,\n\t\t\t0.0, 0.0, 0.0, 1.0\n\t\t);\n\n\t\tshadowMatrix.multiply( shadowCamera.projectionMatrix );\n\t\tshadowMatrix.multiply( shadowCamera.matrixWorldInverse );\n\n\t},\n\n\tgetViewport: function ( viewportIndex ) {\n\n\t\treturn this._viewports[ viewportIndex ];\n\n\t},\n\n\tgetFrameExtents: function () {\n\n\t\treturn this._frameExtents;\n\n\t},\n\n\tcopy: function ( source ) {\n\n\t\tthis.camera = source.camera.clone();\n\n\t\tthis.bias = source.bias;\n\t\tthis.radius = source.radius;\n\n\t\tthis.mapSize.copy( source.mapSize );\n\n\t\treturn this;\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor().copy( this );\n\n\t},\n\n\ttoJSON: function () {\n\n\t\tconst object = {};\n\n\t\tif ( this.bias !== 0 ) object.bias = this.bias;\n\t\tif ( this.normalBias !== 0 ) object.normalBias = this.normalBias;\n\t\tif ( this.radius !== 1 ) object.radius = this.radius;\n\t\tif ( this.mapSize.x !== 512 || this.mapSize.y !== 512 ) object.mapSize = this.mapSize.toArray();\n\n\t\tobject.camera = this.camera.toJSON( false ).object;\n\t\tdelete object.camera.matrix;\n\n\t\treturn object;\n\n\t}\n\n} );\n\nfunction SpotLightShadow() {\n\n\tLightShadow.call( this, new PerspectiveCamera( 50, 1, 0.5, 500 ) );\n\n\tthis.focus = 1;\n\n}\n\nSpotLightShadow.prototype = Object.assign( Object.create( LightShadow.prototype ), {\n\n\tconstructor: SpotLightShadow,\n\n\tisSpotLightShadow: true,\n\n\tupdateMatrices: function ( light ) {\n\n\t\tconst camera = this.camera;\n\n\t\tconst fov = MathUtils.RAD2DEG * 2 * light.angle * this.focus;\n\t\tconst aspect = this.mapSize.width / this.mapSize.height;\n\t\tconst far = light.distance || camera.far;\n\n\t\tif ( fov !== camera.fov || aspect !== camera.aspect || far !== camera.far ) {\n\n\t\t\tcamera.fov = fov;\n\t\t\tcamera.aspect = aspect;\n\t\t\tcamera.far = far;\n\t\t\tcamera.updateProjectionMatrix();\n\n\t\t}\n\n\t\tLightShadow.prototype.updateMatrices.call( this, light );\n\n\t}\n\n} );\n\nfunction SpotLight( color, intensity, distance, angle, penumbra, decay ) {\n\n\tLight.call( this, color, intensity );\n\n\tthis.type = 'SpotLight';\n\n\tthis.position.copy( Object3D.DefaultUp );\n\tthis.updateMatrix();\n\n\tthis.target = new Object3D();\n\n\tObject.defineProperty( this, 'power', {\n\t\tget: function () {\n\n\t\t\t// intensity = power per solid angle.\n\t\t\t// ref: equation (17) from https://seblagarde.files.wordpress.com/2015/07/course_notes_moving_frostbite_to_pbr_v32.pdf\n\t\t\treturn this.intensity * Math.PI;\n\n\t\t},\n\t\tset: function ( power ) {\n\n\t\t\t// intensity = power per solid angle.\n\t\t\t// ref: equation (17) from https://seblagarde.files.wordpress.com/2015/07/course_notes_moving_frostbite_to_pbr_v32.pdf\n\t\t\tthis.intensity = power / Math.PI;\n\n\t\t}\n\t} );\n\n\tthis.distance = ( distance !== undefined ) ? distance : 0;\n\tthis.angle = ( angle !== undefined ) ? angle : Math.PI / 3;\n\tthis.penumbra = ( penumbra !== undefined ) ? penumbra : 0;\n\tthis.decay = ( decay !== undefined ) ? decay : 1;\t// for physically correct lights, should be 2.\n\n\tthis.shadow = new SpotLightShadow();\n\n}\n\nSpotLight.prototype = Object.assign( Object.create( Light.prototype ), {\n\n\tconstructor: SpotLight,\n\n\tisSpotLight: true,\n\n\tcopy: function ( source ) {\n\n\t\tLight.prototype.copy.call( this, source );\n\n\t\tthis.distance = source.distance;\n\t\tthis.angle = source.angle;\n\t\tthis.penumbra = source.penumbra;\n\t\tthis.decay = source.decay;\n\n\t\tthis.target = source.target.clone();\n\n\t\tthis.shadow = source.shadow.clone();\n\n\t\treturn this;\n\n\t}\n\n} );\n\nfunction PointLightShadow() {\n\n\tLightShadow.call( this, new PerspectiveCamera( 90, 1, 0.5, 500 ) );\n\n\tthis._frameExtents = new Vector2( 4, 2 );\n\n\tthis._viewportCount = 6;\n\n\tthis._viewports = [\n\t\t// These viewports map a cube-map onto a 2D texture with the\n\t\t// following orientation:\n\t\t//\n\t\t//  xzXZ\n\t\t//   y Y\n\t\t//\n\t\t// X - Positive x direction\n\t\t// x - Negative x direction\n\t\t// Y - Positive y direction\n\t\t// y - Negative y direction\n\t\t// Z - Positive z direction\n\t\t// z - Negative z direction\n\n\t\t// positive X\n\t\tnew Vector4( 2, 1, 1, 1 ),\n\t\t// negative X\n\t\tnew Vector4( 0, 1, 1, 1 ),\n\t\t// positive Z\n\t\tnew Vector4( 3, 1, 1, 1 ),\n\t\t// negative Z\n\t\tnew Vector4( 1, 1, 1, 1 ),\n\t\t// positive Y\n\t\tnew Vector4( 3, 0, 1, 1 ),\n\t\t// negative Y\n\t\tnew Vector4( 1, 0, 1, 1 )\n\t];\n\n\tthis._cubeDirections = [\n\t\tnew Vector3( 1, 0, 0 ), new Vector3( - 1, 0, 0 ), new Vector3( 0, 0, 1 ),\n\t\tnew Vector3( 0, 0, - 1 ), new Vector3( 0, 1, 0 ), new Vector3( 0, - 1, 0 )\n\t];\n\n\tthis._cubeUps = [\n\t\tnew Vector3( 0, 1, 0 ), new Vector3( 0, 1, 0 ), new Vector3( 0, 1, 0 ),\n\t\tnew Vector3( 0, 1, 0 ), new Vector3( 0, 0, 1 ),\tnew Vector3( 0, 0, - 1 )\n\t];\n\n}\n\nPointLightShadow.prototype = Object.assign( Object.create( LightShadow.prototype ), {\n\n\tconstructor: PointLightShadow,\n\n\tisPointLightShadow: true,\n\n\tupdateMatrices: function ( light, viewportIndex = 0 ) {\n\n\t\tconst camera = this.camera,\n\t\t\tshadowMatrix = this.matrix,\n\t\t\tlightPositionWorld = this._lightPositionWorld,\n\t\t\tlookTarget = this._lookTarget,\n\t\t\tprojScreenMatrix = this._projScreenMatrix;\n\n\t\tlightPositionWorld.setFromMatrixPosition( light.matrixWorld );\n\t\tcamera.position.copy( lightPositionWorld );\n\n\t\tlookTarget.copy( camera.position );\n\t\tlookTarget.add( this._cubeDirections[ viewportIndex ] );\n\t\tcamera.up.copy( this._cubeUps[ viewportIndex ] );\n\t\tcamera.lookAt( lookTarget );\n\t\tcamera.updateMatrixWorld();\n\n\t\tshadowMatrix.makeTranslation( - lightPositionWorld.x, - lightPositionWorld.y, - lightPositionWorld.z );\n\n\t\tprojScreenMatrix.multiplyMatrices( camera.projectionMatrix, camera.matrixWorldInverse );\n\t\tthis._frustum.setFromProjectionMatrix( projScreenMatrix );\n\n\t}\n\n} );\n\nfunction PointLight( color, intensity, distance, decay ) {\n\n\tLight.call( this, color, intensity );\n\n\tthis.type = 'PointLight';\n\n\tObject.defineProperty( this, 'power', {\n\t\tget: function () {\n\n\t\t\t// intensity = power per solid angle.\n\t\t\t// ref: equation (15) from https://seblagarde.files.wordpress.com/2015/07/course_notes_moving_frostbite_to_pbr_v32.pdf\n\t\t\treturn this.intensity * 4 * Math.PI;\n\n\t\t},\n\t\tset: function ( power ) {\n\n\t\t\t// intensity = power per solid angle.\n\t\t\t// ref: equation (15) from https://seblagarde.files.wordpress.com/2015/07/course_notes_moving_frostbite_to_pbr_v32.pdf\n\t\t\tthis.intensity = power / ( 4 * Math.PI );\n\n\t\t}\n\t} );\n\n\tthis.distance = ( distance !== undefined ) ? distance : 0;\n\tthis.decay = ( decay !== undefined ) ? decay : 1;\t// for physically correct lights, should be 2.\n\n\tthis.shadow = new PointLightShadow();\n\n}\n\nPointLight.prototype = Object.assign( Object.create( Light.prototype ), {\n\n\tconstructor: PointLight,\n\n\tisPointLight: true,\n\n\tcopy: function ( source ) {\n\n\t\tLight.prototype.copy.call( this, source );\n\n\t\tthis.distance = source.distance;\n\t\tthis.decay = source.decay;\n\n\t\tthis.shadow = source.shadow.clone();\n\n\t\treturn this;\n\n\t}\n\n} );\n\nfunction OrthographicCamera( left = - 1, right = 1, top = 1, bottom = - 1, near = 0.1, far = 2000 ) {\n\n\tCamera.call( this );\n\n\tthis.type = 'OrthographicCamera';\n\n\tthis.zoom = 1;\n\tthis.view = null;\n\n\tthis.left = left;\n\tthis.right = right;\n\tthis.top = top;\n\tthis.bottom = bottom;\n\n\tthis.near = near;\n\tthis.far = far;\n\n\tthis.updateProjectionMatrix();\n\n}\n\nOrthographicCamera.prototype = Object.assign( Object.create( Camera.prototype ), {\n\n\tconstructor: OrthographicCamera,\n\n\tisOrthographicCamera: true,\n\n\tcopy: function ( source, recursive ) {\n\n\t\tCamera.prototype.copy.call( this, source, recursive );\n\n\t\tthis.left = source.left;\n\t\tthis.right = source.right;\n\t\tthis.top = source.top;\n\t\tthis.bottom = source.bottom;\n\t\tthis.near = source.near;\n\t\tthis.far = source.far;\n\n\t\tthis.zoom = source.zoom;\n\t\tthis.view = source.view === null ? null : Object.assign( {}, source.view );\n\n\t\treturn this;\n\n\t},\n\n\tsetViewOffset: function ( fullWidth, fullHeight, x, y, width, height ) {\n\n\t\tif ( this.view === null ) {\n\n\t\t\tthis.view = {\n\t\t\t\tenabled: true,\n\t\t\t\tfullWidth: 1,\n\t\t\t\tfullHeight: 1,\n\t\t\t\toffsetX: 0,\n\t\t\t\toffsetY: 0,\n\t\t\t\twidth: 1,\n\t\t\t\theight: 1\n\t\t\t};\n\n\t\t}\n\n\t\tthis.view.enabled = true;\n\t\tthis.view.fullWidth = fullWidth;\n\t\tthis.view.fullHeight = fullHeight;\n\t\tthis.view.offsetX = x;\n\t\tthis.view.offsetY = y;\n\t\tthis.view.width = width;\n\t\tthis.view.height = height;\n\n\t\tthis.updateProjectionMatrix();\n\n\t},\n\n\tclearViewOffset: function () {\n\n\t\tif ( this.view !== null ) {\n\n\t\t\tthis.view.enabled = false;\n\n\t\t}\n\n\t\tthis.updateProjectionMatrix();\n\n\t},\n\n\tupdateProjectionMatrix: function () {\n\n\t\tconst dx = ( this.right - this.left ) / ( 2 * this.zoom );\n\t\tconst dy = ( this.top - this.bottom ) / ( 2 * this.zoom );\n\t\tconst cx = ( this.right + this.left ) / 2;\n\t\tconst cy = ( this.top + this.bottom ) / 2;\n\n\t\tlet left = cx - dx;\n\t\tlet right = cx + dx;\n\t\tlet top = cy + dy;\n\t\tlet bottom = cy - dy;\n\n\t\tif ( this.view !== null && this.view.enabled ) {\n\n\t\t\tconst scaleW = ( this.right - this.left ) / this.view.fullWidth / this.zoom;\n\t\t\tconst scaleH = ( this.top - this.bottom ) / this.view.fullHeight / this.zoom;\n\n\t\t\tleft += scaleW * this.view.offsetX;\n\t\t\tright = left + scaleW * this.view.width;\n\t\t\ttop -= scaleH * this.view.offsetY;\n\t\t\tbottom = top - scaleH * this.view.height;\n\n\t\t}\n\n\t\tthis.projectionMatrix.makeOrthographic( left, right, top, bottom, this.near, this.far );\n\n\t\tthis.projectionMatrixInverse.copy( this.projectionMatrix ).invert();\n\n\t},\n\n\ttoJSON: function ( meta ) {\n\n\t\tconst data = Object3D.prototype.toJSON.call( this, meta );\n\n\t\tdata.object.zoom = this.zoom;\n\t\tdata.object.left = this.left;\n\t\tdata.object.right = this.right;\n\t\tdata.object.top = this.top;\n\t\tdata.object.bottom = this.bottom;\n\t\tdata.object.near = this.near;\n\t\tdata.object.far = this.far;\n\n\t\tif ( this.view !== null ) data.object.view = Object.assign( {}, this.view );\n\n\t\treturn data;\n\n\t}\n\n} );\n\nfunction DirectionalLightShadow() {\n\n\tLightShadow.call( this, new OrthographicCamera( - 5, 5, 5, - 5, 0.5, 500 ) );\n\n}\n\nDirectionalLightShadow.prototype = Object.assign( Object.create( LightShadow.prototype ), {\n\n\tconstructor: DirectionalLightShadow,\n\n\tisDirectionalLightShadow: true,\n\n\tupdateMatrices: function ( light ) {\n\n\t\tLightShadow.prototype.updateMatrices.call( this, light );\n\n\t}\n\n} );\n\nfunction DirectionalLight( color, intensity ) {\n\n\tLight.call( this, color, intensity );\n\n\tthis.type = 'DirectionalLight';\n\n\tthis.position.copy( Object3D.DefaultUp );\n\tthis.updateMatrix();\n\n\tthis.target = new Object3D();\n\n\tthis.shadow = new DirectionalLightShadow();\n\n}\n\nDirectionalLight.prototype = Object.assign( Object.create( Light.prototype ), {\n\n\tconstructor: DirectionalLight,\n\n\tisDirectionalLight: true,\n\n\tcopy: function ( source ) {\n\n\t\tLight.prototype.copy.call( this, source );\n\n\t\tthis.target = source.target.clone();\n\n\t\tthis.shadow = source.shadow.clone();\n\n\t\treturn this;\n\n\t}\n\n} );\n\nfunction AmbientLight( color, intensity ) {\n\n\tLight.call( this, color, intensity );\n\n\tthis.type = 'AmbientLight';\n\n}\n\nAmbientLight.prototype = Object.assign( Object.create( Light.prototype ), {\n\n\tconstructor: AmbientLight,\n\n\tisAmbientLight: true\n\n} );\n\nfunction RectAreaLight( color, intensity, width, height ) {\n\n\tLight.call( this, color, intensity );\n\n\tthis.type = 'RectAreaLight';\n\n\tthis.width = ( width !== undefined ) ? width : 10;\n\tthis.height = ( height !== undefined ) ? height : 10;\n\n}\n\nRectAreaLight.prototype = Object.assign( Object.create( Light.prototype ), {\n\n\tconstructor: RectAreaLight,\n\n\tisRectAreaLight: true,\n\n\tcopy: function ( source ) {\n\n\t\tLight.prototype.copy.call( this, source );\n\n\t\tthis.width = source.width;\n\t\tthis.height = source.height;\n\n\t\treturn this;\n\n\t},\n\n\ttoJSON: function ( meta ) {\n\n\t\tconst data = Light.prototype.toJSON.call( this, meta );\n\n\t\tdata.object.width = this.width;\n\t\tdata.object.height = this.height;\n\n\t\treturn data;\n\n\t}\n\n} );\n\n/**\n * Primary reference:\n *   https://graphics.stanford.edu/papers/envmap/envmap.pdf\n *\n * Secondary reference:\n *   https://www.ppsloan.org/publications/StupidSH36.pdf\n */\n\n// 3-band SH defined by 9 coefficients\n\nclass SphericalHarmonics3 {\n\n\tconstructor() {\n\n\t\tObject.defineProperty( this, 'isSphericalHarmonics3', { value: true } );\n\n\t\tthis.coefficients = [];\n\n\t\tfor ( let i = 0; i < 9; i ++ ) {\n\n\t\t\tthis.coefficients.push( new Vector3() );\n\n\t\t}\n\n\t}\n\n\tset( coefficients ) {\n\n\t\tfor ( let i = 0; i < 9; i ++ ) {\n\n\t\t\tthis.coefficients[ i ].copy( coefficients[ i ] );\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n\tzero() {\n\n\t\tfor ( let i = 0; i < 9; i ++ ) {\n\n\t\t\tthis.coefficients[ i ].set( 0, 0, 0 );\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n\t// get the radiance in the direction of the normal\n\t// target is a Vector3\n\tgetAt( normal, target ) {\n\n\t\t// normal is assumed to be unit length\n\n\t\tconst x = normal.x, y = normal.y, z = normal.z;\n\n\t\tconst coeff = this.coefficients;\n\n\t\t// band 0\n\t\ttarget.copy( coeff[ 0 ] ).multiplyScalar( 0.282095 );\n\n\t\t// band 1\n\t\ttarget.addScaledVector( coeff[ 1 ], 0.488603 * y );\n\t\ttarget.addScaledVector( coeff[ 2 ], 0.488603 * z );\n\t\ttarget.addScaledVector( coeff[ 3 ], 0.488603 * x );\n\n\t\t// band 2\n\t\ttarget.addScaledVector( coeff[ 4 ], 1.092548 * ( x * y ) );\n\t\ttarget.addScaledVector( coeff[ 5 ], 1.092548 * ( y * z ) );\n\t\ttarget.addScaledVector( coeff[ 6 ], 0.315392 * ( 3.0 * z * z - 1.0 ) );\n\t\ttarget.addScaledVector( coeff[ 7 ], 1.092548 * ( x * z ) );\n\t\ttarget.addScaledVector( coeff[ 8 ], 0.546274 * ( x * x - y * y ) );\n\n\t\treturn target;\n\n\t}\n\n\t// get the irradiance (radiance convolved with cosine lobe) in the direction of the normal\n\t// target is a Vector3\n\t// https://graphics.stanford.edu/papers/envmap/envmap.pdf\n\tgetIrradianceAt( normal, target ) {\n\n\t\t// normal is assumed to be unit length\n\n\t\tconst x = normal.x, y = normal.y, z = normal.z;\n\n\t\tconst coeff = this.coefficients;\n\n\t\t// band 0\n\t\ttarget.copy( coeff[ 0 ] ).multiplyScalar( 0.886227 ); // π * 0.282095\n\n\t\t// band 1\n\t\ttarget.addScaledVector( coeff[ 1 ], 2.0 * 0.511664 * y ); // ( 2 * π / 3 ) * 0.488603\n\t\ttarget.addScaledVector( coeff[ 2 ], 2.0 * 0.511664 * z );\n\t\ttarget.addScaledVector( coeff[ 3 ], 2.0 * 0.511664 * x );\n\n\t\t// band 2\n\t\ttarget.addScaledVector( coeff[ 4 ], 2.0 * 0.429043 * x * y ); // ( π / 4 ) * 1.092548\n\t\ttarget.addScaledVector( coeff[ 5 ], 2.0 * 0.429043 * y * z );\n\t\ttarget.addScaledVector( coeff[ 6 ], 0.743125 * z * z - 0.247708 ); // ( π / 4 ) * 0.315392 * 3\n\t\ttarget.addScaledVector( coeff[ 7 ], 2.0 * 0.429043 * x * z );\n\t\ttarget.addScaledVector( coeff[ 8 ], 0.429043 * ( x * x - y * y ) ); // ( π / 4 ) * 0.546274\n\n\t\treturn target;\n\n\t}\n\n\tadd( sh ) {\n\n\t\tfor ( let i = 0; i < 9; i ++ ) {\n\n\t\t\tthis.coefficients[ i ].add( sh.coefficients[ i ] );\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n\taddScaledSH( sh, s ) {\n\n\t\tfor ( let i = 0; i < 9; i ++ ) {\n\n\t\t\tthis.coefficients[ i ].addScaledVector( sh.coefficients[ i ], s );\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n\tscale( s ) {\n\n\t\tfor ( let i = 0; i < 9; i ++ ) {\n\n\t\t\tthis.coefficients[ i ].multiplyScalar( s );\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n\tlerp( sh, alpha ) {\n\n\t\tfor ( let i = 0; i < 9; i ++ ) {\n\n\t\t\tthis.coefficients[ i ].lerp( sh.coefficients[ i ], alpha );\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n\tequals( sh ) {\n\n\t\tfor ( let i = 0; i < 9; i ++ ) {\n\n\t\t\tif ( ! this.coefficients[ i ].equals( sh.coefficients[ i ] ) ) {\n\n\t\t\t\treturn false;\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn true;\n\n\t}\n\n\tcopy( sh ) {\n\n\t\treturn this.set( sh.coefficients );\n\n\t}\n\n\tclone() {\n\n\t\treturn new this.constructor().copy( this );\n\n\t}\n\n\tfromArray( array, offset = 0 ) {\n\n\t\tconst coefficients = this.coefficients;\n\n\t\tfor ( let i = 0; i < 9; i ++ ) {\n\n\t\t\tcoefficients[ i ].fromArray( array, offset + ( i * 3 ) );\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n\ttoArray( array = [], offset = 0 ) {\n\n\t\tconst coefficients = this.coefficients;\n\n\t\tfor ( let i = 0; i < 9; i ++ ) {\n\n\t\t\tcoefficients[ i ].toArray( array, offset + ( i * 3 ) );\n\n\t\t}\n\n\t\treturn array;\n\n\t}\n\n\t// evaluate the basis functions\n\t// shBasis is an Array[ 9 ]\n\tstatic getBasisAt( normal, shBasis ) {\n\n\t\t// normal is assumed to be unit length\n\n\t\tconst x = normal.x, y = normal.y, z = normal.z;\n\n\t\t// band 0\n\t\tshBasis[ 0 ] = 0.282095;\n\n\t\t// band 1\n\t\tshBasis[ 1 ] = 0.488603 * y;\n\t\tshBasis[ 2 ] = 0.488603 * z;\n\t\tshBasis[ 3 ] = 0.488603 * x;\n\n\t\t// band 2\n\t\tshBasis[ 4 ] = 1.092548 * x * y;\n\t\tshBasis[ 5 ] = 1.092548 * y * z;\n\t\tshBasis[ 6 ] = 0.315392 * ( 3 * z * z - 1 );\n\t\tshBasis[ 7 ] = 1.092548 * x * z;\n\t\tshBasis[ 8 ] = 0.546274 * ( x * x - y * y );\n\n\t}\n\n}\n\nfunction LightProbe( sh, intensity ) {\n\n\tLight.call( this, undefined, intensity );\n\n\tthis.type = 'LightProbe';\n\n\tthis.sh = ( sh !== undefined ) ? sh : new SphericalHarmonics3();\n\n}\n\nLightProbe.prototype = Object.assign( Object.create( Light.prototype ), {\n\n\tconstructor: LightProbe,\n\n\tisLightProbe: true,\n\n\tcopy: function ( source ) {\n\n\t\tLight.prototype.copy.call( this, source );\n\n\t\tthis.sh.copy( source.sh );\n\n\t\treturn this;\n\n\t},\n\n\tfromJSON: function ( json ) {\n\n\t\tthis.intensity = json.intensity; // TODO: Move this bit to Light.fromJSON();\n\t\tthis.sh.fromArray( json.sh );\n\n\t\treturn this;\n\n\t},\n\n\ttoJSON: function ( meta ) {\n\n\t\tconst data = Light.prototype.toJSON.call( this, meta );\n\n\t\tdata.object.sh = this.sh.toArray();\n\n\t\treturn data;\n\n\t}\n\n} );\n\nfunction MaterialLoader( manager ) {\n\n\tLoader.call( this, manager );\n\n\tthis.textures = {};\n\n}\n\nMaterialLoader.prototype = Object.assign( Object.create( Loader.prototype ), {\n\n\tconstructor: MaterialLoader,\n\n\tload: function ( url, onLoad, onProgress, onError ) {\n\n\t\tconst scope = this;\n\n\t\tconst loader = new FileLoader( scope.manager );\n\t\tloader.setPath( scope.path );\n\t\tloader.setRequestHeader( scope.requestHeader );\n\t\tloader.setWithCredentials( scope.withCredentials );\n\t\tloader.load( url, function ( text ) {\n\n\t\t\ttry {\n\n\t\t\t\tonLoad( scope.parse( JSON.parse( text ) ) );\n\n\t\t\t} catch ( e ) {\n\n\t\t\t\tif ( onError ) {\n\n\t\t\t\t\tonError( e );\n\n\t\t\t\t} else {\n\n\t\t\t\t\tconsole.error( e );\n\n\t\t\t\t}\n\n\t\t\t\tscope.manager.itemError( url );\n\n\t\t\t}\n\n\t\t}, onProgress, onError );\n\n\t},\n\n\tparse: function ( json ) {\n\n\t\tconst textures = this.textures;\n\n\t\tfunction getTexture( name ) {\n\n\t\t\tif ( textures[ name ] === undefined ) {\n\n\t\t\t\tconsole.warn( 'THREE.MaterialLoader: Undefined texture', name );\n\n\t\t\t}\n\n\t\t\treturn textures[ name ];\n\n\t\t}\n\n\t\tconst material = new Materials[ json.type ]();\n\n\t\tif ( json.uuid !== undefined ) material.uuid = json.uuid;\n\t\tif ( json.name !== undefined ) material.name = json.name;\n\t\tif ( json.color !== undefined && material.color !== undefined ) material.color.setHex( json.color );\n\t\tif ( json.roughness !== undefined ) material.roughness = json.roughness;\n\t\tif ( json.metalness !== undefined ) material.metalness = json.metalness;\n\t\tif ( json.sheen !== undefined ) material.sheen = new Color().setHex( json.sheen );\n\t\tif ( json.emissive !== undefined && material.emissive !== undefined ) material.emissive.setHex( json.emissive );\n\t\tif ( json.specular !== undefined && material.specular !== undefined ) material.specular.setHex( json.specular );\n\t\tif ( json.shininess !== undefined ) material.shininess = json.shininess;\n\t\tif ( json.clearcoat !== undefined ) material.clearcoat = json.clearcoat;\n\t\tif ( json.clearcoatRoughness !== undefined ) material.clearcoatRoughness = json.clearcoatRoughness;\n\t\tif ( json.fog !== undefined ) material.fog = json.fog;\n\t\tif ( json.flatShading !== undefined ) material.flatShading = json.flatShading;\n\t\tif ( json.blending !== undefined ) material.blending = json.blending;\n\t\tif ( json.combine !== undefined ) material.combine = json.combine;\n\t\tif ( json.side !== undefined ) material.side = json.side;\n\t\tif ( json.opacity !== undefined ) material.opacity = json.opacity;\n\t\tif ( json.transparent !== undefined ) material.transparent = json.transparent;\n\t\tif ( json.alphaTest !== undefined ) material.alphaTest = json.alphaTest;\n\t\tif ( json.depthTest !== undefined ) material.depthTest = json.depthTest;\n\t\tif ( json.depthWrite !== undefined ) material.depthWrite = json.depthWrite;\n\t\tif ( json.colorWrite !== undefined ) material.colorWrite = json.colorWrite;\n\n\t\tif ( json.stencilWrite !== undefined ) material.stencilWrite = json.stencilWrite;\n\t\tif ( json.stencilWriteMask !== undefined ) material.stencilWriteMask = json.stencilWriteMask;\n\t\tif ( json.stencilFunc !== undefined ) material.stencilFunc = json.stencilFunc;\n\t\tif ( json.stencilRef !== undefined ) material.stencilRef = json.stencilRef;\n\t\tif ( json.stencilFuncMask !== undefined ) material.stencilFuncMask = json.stencilFuncMask;\n\t\tif ( json.stencilFail !== undefined ) material.stencilFail = json.stencilFail;\n\t\tif ( json.stencilZFail !== undefined ) material.stencilZFail = json.stencilZFail;\n\t\tif ( json.stencilZPass !== undefined ) material.stencilZPass = json.stencilZPass;\n\n\t\tif ( json.wireframe !== undefined ) material.wireframe = json.wireframe;\n\t\tif ( json.wireframeLinewidth !== undefined ) material.wireframeLinewidth = json.wireframeLinewidth;\n\t\tif ( json.wireframeLinecap !== undefined ) material.wireframeLinecap = json.wireframeLinecap;\n\t\tif ( json.wireframeLinejoin !== undefined ) material.wireframeLinejoin = json.wireframeLinejoin;\n\n\t\tif ( json.rotation !== undefined ) material.rotation = json.rotation;\n\n\t\tif ( json.linewidth !== 1 ) material.linewidth = json.linewidth;\n\t\tif ( json.dashSize !== undefined ) material.dashSize = json.dashSize;\n\t\tif ( json.gapSize !== undefined ) material.gapSize = json.gapSize;\n\t\tif ( json.scale !== undefined ) material.scale = json.scale;\n\n\t\tif ( json.polygonOffset !== undefined ) material.polygonOffset = json.polygonOffset;\n\t\tif ( json.polygonOffsetFactor !== undefined ) material.polygonOffsetFactor = json.polygonOffsetFactor;\n\t\tif ( json.polygonOffsetUnits !== undefined ) material.polygonOffsetUnits = json.polygonOffsetUnits;\n\n\t\tif ( json.skinning !== undefined ) material.skinning = json.skinning;\n\t\tif ( json.morphTargets !== undefined ) material.morphTargets = json.morphTargets;\n\t\tif ( json.morphNormals !== undefined ) material.morphNormals = json.morphNormals;\n\t\tif ( json.dithering !== undefined ) material.dithering = json.dithering;\n\n\t\tif ( json.vertexTangents !== undefined ) material.vertexTangents = json.vertexTangents;\n\n\t\tif ( json.visible !== undefined ) material.visible = json.visible;\n\n\t\tif ( json.toneMapped !== undefined ) material.toneMapped = json.toneMapped;\n\n\t\tif ( json.userData !== undefined ) material.userData = json.userData;\n\n\t\tif ( json.vertexColors !== undefined ) {\n\n\t\t\tif ( typeof json.vertexColors === 'number' ) {\n\n\t\t\t\tmaterial.vertexColors = ( json.vertexColors > 0 ) ? true : false;\n\n\t\t\t} else {\n\n\t\t\t\tmaterial.vertexColors = json.vertexColors;\n\n\t\t\t}\n\n\t\t}\n\n\t\t// Shader Material\n\n\t\tif ( json.uniforms !== undefined ) {\n\n\t\t\tfor ( const name in json.uniforms ) {\n\n\t\t\t\tconst uniform = json.uniforms[ name ];\n\n\t\t\t\tmaterial.uniforms[ name ] = {};\n\n\t\t\t\tswitch ( uniform.type ) {\n\n\t\t\t\t\tcase 't':\n\t\t\t\t\t\tmaterial.uniforms[ name ].value = getTexture( uniform.value );\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'c':\n\t\t\t\t\t\tmaterial.uniforms[ name ].value = new Color().setHex( uniform.value );\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'v2':\n\t\t\t\t\t\tmaterial.uniforms[ name ].value = new Vector2().fromArray( uniform.value );\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'v3':\n\t\t\t\t\t\tmaterial.uniforms[ name ].value = new Vector3().fromArray( uniform.value );\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'v4':\n\t\t\t\t\t\tmaterial.uniforms[ name ].value = new Vector4().fromArray( uniform.value );\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'm3':\n\t\t\t\t\t\tmaterial.uniforms[ name ].value = new Matrix3().fromArray( uniform.value );\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'm4':\n\t\t\t\t\t\tmaterial.uniforms[ name ].value = new Matrix4().fromArray( uniform.value );\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tdefault:\n\t\t\t\t\t\tmaterial.uniforms[ name ].value = uniform.value;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( json.defines !== undefined ) material.defines = json.defines;\n\t\tif ( json.vertexShader !== undefined ) material.vertexShader = json.vertexShader;\n\t\tif ( json.fragmentShader !== undefined ) material.fragmentShader = json.fragmentShader;\n\n\t\tif ( json.extensions !== undefined ) {\n\n\t\t\tfor ( const key in json.extensions ) {\n\n\t\t\t\tmaterial.extensions[ key ] = json.extensions[ key ];\n\n\t\t\t}\n\n\t\t}\n\n\t\t// Deprecated\n\n\t\tif ( json.shading !== undefined ) material.flatShading = json.shading === 1; // THREE.FlatShading\n\n\t\t// for PointsMaterial\n\n\t\tif ( json.size !== undefined ) material.size = json.size;\n\t\tif ( json.sizeAttenuation !== undefined ) material.sizeAttenuation = json.sizeAttenuation;\n\n\t\t// maps\n\n\t\tif ( json.map !== undefined ) material.map = getTexture( json.map );\n\t\tif ( json.matcap !== undefined ) material.matcap = getTexture( json.matcap );\n\n\t\tif ( json.alphaMap !== undefined ) material.alphaMap = getTexture( json.alphaMap );\n\n\t\tif ( json.bumpMap !== undefined ) material.bumpMap = getTexture( json.bumpMap );\n\t\tif ( json.bumpScale !== undefined ) material.bumpScale = json.bumpScale;\n\n\t\tif ( json.normalMap !== undefined ) material.normalMap = getTexture( json.normalMap );\n\t\tif ( json.normalMapType !== undefined ) material.normalMapType = json.normalMapType;\n\t\tif ( json.normalScale !== undefined ) {\n\n\t\t\tlet normalScale = json.normalScale;\n\n\t\t\tif ( Array.isArray( normalScale ) === false ) {\n\n\t\t\t\t// Blender exporter used to export a scalar. See #7459\n\n\t\t\t\tnormalScale = [ normalScale, normalScale ];\n\n\t\t\t}\n\n\t\t\tmaterial.normalScale = new Vector2().fromArray( normalScale );\n\n\t\t}\n\n\t\tif ( json.displacementMap !== undefined ) material.displacementMap = getTexture( json.displacementMap );\n\t\tif ( json.displacementScale !== undefined ) material.displacementScale = json.displacementScale;\n\t\tif ( json.displacementBias !== undefined ) material.displacementBias = json.displacementBias;\n\n\t\tif ( json.roughnessMap !== undefined ) material.roughnessMap = getTexture( json.roughnessMap );\n\t\tif ( json.metalnessMap !== undefined ) material.metalnessMap = getTexture( json.metalnessMap );\n\n\t\tif ( json.emissiveMap !== undefined ) material.emissiveMap = getTexture( json.emissiveMap );\n\t\tif ( json.emissiveIntensity !== undefined ) material.emissiveIntensity = json.emissiveIntensity;\n\n\t\tif ( json.specularMap !== undefined ) material.specularMap = getTexture( json.specularMap );\n\n\t\tif ( json.envMap !== undefined ) material.envMap = getTexture( json.envMap );\n\t\tif ( json.envMapIntensity !== undefined ) material.envMapIntensity = json.envMapIntensity;\n\n\t\tif ( json.reflectivity !== undefined ) material.reflectivity = json.reflectivity;\n\t\tif ( json.refractionRatio !== undefined ) material.refractionRatio = json.refractionRatio;\n\n\t\tif ( json.lightMap !== undefined ) material.lightMap = getTexture( json.lightMap );\n\t\tif ( json.lightMapIntensity !== undefined ) material.lightMapIntensity = json.lightMapIntensity;\n\n\t\tif ( json.aoMap !== undefined ) material.aoMap = getTexture( json.aoMap );\n\t\tif ( json.aoMapIntensity !== undefined ) material.aoMapIntensity = json.aoMapIntensity;\n\n\t\tif ( json.gradientMap !== undefined ) material.gradientMap = getTexture( json.gradientMap );\n\n\t\tif ( json.clearcoatMap !== undefined ) material.clearcoatMap = getTexture( json.clearcoatMap );\n\t\tif ( json.clearcoatRoughnessMap !== undefined ) material.clearcoatRoughnessMap = getTexture( json.clearcoatRoughnessMap );\n\t\tif ( json.clearcoatNormalMap !== undefined ) material.clearcoatNormalMap = getTexture( json.clearcoatNormalMap );\n\t\tif ( json.clearcoatNormalScale !== undefined ) material.clearcoatNormalScale = new Vector2().fromArray( json.clearcoatNormalScale );\n\n\t\tif ( json.transmission !== undefined ) material.transmission = json.transmission;\n\t\tif ( json.transmissionMap !== undefined ) material.transmissionMap = getTexture( json.transmissionMap );\n\n\t\treturn material;\n\n\t},\n\n\tsetTextures: function ( value ) {\n\n\t\tthis.textures = value;\n\t\treturn this;\n\n\t}\n\n} );\n\nconst LoaderUtils = {\n\n\tdecodeText: function ( array ) {\n\n\t\tif ( typeof TextDecoder !== 'undefined' ) {\n\n\t\t\treturn new TextDecoder().decode( array );\n\n\t\t}\n\n\t\t// Avoid the String.fromCharCode.apply(null, array) shortcut, which\n\t\t// throws a \"maximum call stack size exceeded\" error for large arrays.\n\n\t\tlet s = '';\n\n\t\tfor ( let i = 0, il = array.length; i < il; i ++ ) {\n\n\t\t\t// Implicitly assumes little-endian.\n\t\t\ts += String.fromCharCode( array[ i ] );\n\n\t\t}\n\n\t\ttry {\n\n\t\t\t// merges multi-byte utf-8 characters.\n\n\t\t\treturn decodeURIComponent( escape( s ) );\n\n\t\t} catch ( e ) { // see #16358\n\n\t\t\treturn s;\n\n\t\t}\n\n\t},\n\n\textractUrlBase: function ( url ) {\n\n\t\tconst index = url.lastIndexOf( '/' );\n\n\t\tif ( index === - 1 ) return './';\n\n\t\treturn url.substr( 0, index + 1 );\n\n\t}\n\n};\n\nfunction InstancedBufferGeometry() {\n\n\tBufferGeometry.call( this );\n\n\tthis.type = 'InstancedBufferGeometry';\n\tthis.instanceCount = Infinity;\n\n}\n\nInstancedBufferGeometry.prototype = Object.assign( Object.create( BufferGeometry.prototype ), {\n\n\tconstructor: InstancedBufferGeometry,\n\n\tisInstancedBufferGeometry: true,\n\n\tcopy: function ( source ) {\n\n\t\tBufferGeometry.prototype.copy.call( this, source );\n\n\t\tthis.instanceCount = source.instanceCount;\n\n\t\treturn this;\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor().copy( this );\n\n\t},\n\n\ttoJSON: function () {\n\n\t\tconst data = BufferGeometry.prototype.toJSON.call( this );\n\n\t\tdata.instanceCount = this.instanceCount;\n\n\t\tdata.isInstancedBufferGeometry = true;\n\n\t\treturn data;\n\n\t}\n\n} );\n\nfunction InstancedBufferAttribute( array, itemSize, normalized, meshPerAttribute ) {\n\n\tif ( typeof ( normalized ) === 'number' ) {\n\n\t\tmeshPerAttribute = normalized;\n\n\t\tnormalized = false;\n\n\t\tconsole.error( 'THREE.InstancedBufferAttribute: The constructor now expects normalized as the third argument.' );\n\n\t}\n\n\tBufferAttribute.call( this, array, itemSize, normalized );\n\n\tthis.meshPerAttribute = meshPerAttribute || 1;\n\n}\n\nInstancedBufferAttribute.prototype = Object.assign( Object.create( BufferAttribute.prototype ), {\n\n\tconstructor: InstancedBufferAttribute,\n\n\tisInstancedBufferAttribute: true,\n\n\tcopy: function ( source ) {\n\n\t\tBufferAttribute.prototype.copy.call( this, source );\n\n\t\tthis.meshPerAttribute = source.meshPerAttribute;\n\n\t\treturn this;\n\n\t},\n\n\ttoJSON: function ()\t{\n\n\t\tconst data = BufferAttribute.prototype.toJSON.call( this );\n\n\t\tdata.meshPerAttribute = this.meshPerAttribute;\n\n\t\tdata.isInstancedBufferAttribute = true;\n\n\t\treturn data;\n\n\t}\n\n} );\n\nfunction BufferGeometryLoader( manager ) {\n\n\tLoader.call( this, manager );\n\n}\n\nBufferGeometryLoader.prototype = Object.assign( Object.create( Loader.prototype ), {\n\n\tconstructor: BufferGeometryLoader,\n\n\tload: function ( url, onLoad, onProgress, onError ) {\n\n\t\tconst scope = this;\n\n\t\tconst loader = new FileLoader( scope.manager );\n\t\tloader.setPath( scope.path );\n\t\tloader.setRequestHeader( scope.requestHeader );\n\t\tloader.setWithCredentials( scope.withCredentials );\n\t\tloader.load( url, function ( text ) {\n\n\t\t\ttry {\n\n\t\t\t\tonLoad( scope.parse( JSON.parse( text ) ) );\n\n\t\t\t} catch ( e ) {\n\n\t\t\t\tif ( onError ) {\n\n\t\t\t\t\tonError( e );\n\n\t\t\t\t} else {\n\n\t\t\t\t\tconsole.error( e );\n\n\t\t\t\t}\n\n\t\t\t\tscope.manager.itemError( url );\n\n\t\t\t}\n\n\t\t}, onProgress, onError );\n\n\t},\n\n\tparse: function ( json ) {\n\n\t\tconst interleavedBufferMap = {};\n\t\tconst arrayBufferMap = {};\n\n\t\tfunction getInterleavedBuffer( json, uuid ) {\n\n\t\t\tif ( interleavedBufferMap[ uuid ] !== undefined ) return interleavedBufferMap[ uuid ];\n\n\t\t\tconst interleavedBuffers = json.interleavedBuffers;\n\t\t\tconst interleavedBuffer = interleavedBuffers[ uuid ];\n\n\t\t\tconst buffer = getArrayBuffer( json, interleavedBuffer.buffer );\n\n\t\t\tconst array = getTypedArray( interleavedBuffer.type, buffer );\n\t\t\tconst ib = new InterleavedBuffer( array, interleavedBuffer.stride );\n\t\t\tib.uuid = interleavedBuffer.uuid;\n\n\t\t\tinterleavedBufferMap[ uuid ] = ib;\n\n\t\t\treturn ib;\n\n\t\t}\n\n\t\tfunction getArrayBuffer( json, uuid ) {\n\n\t\t\tif ( arrayBufferMap[ uuid ] !== undefined ) return arrayBufferMap[ uuid ];\n\n\t\t\tconst arrayBuffers = json.arrayBuffers;\n\t\t\tconst arrayBuffer = arrayBuffers[ uuid ];\n\n\t\t\tconst ab = new Uint32Array( arrayBuffer ).buffer;\n\n\t\t\tarrayBufferMap[ uuid ] = ab;\n\n\t\t\treturn ab;\n\n\t\t}\n\n\t\tconst geometry = json.isInstancedBufferGeometry ? new InstancedBufferGeometry() : new BufferGeometry();\n\n\t\tconst index = json.data.index;\n\n\t\tif ( index !== undefined ) {\n\n\t\t\tconst typedArray = getTypedArray( index.type, index.array );\n\t\t\tgeometry.setIndex( new BufferAttribute( typedArray, 1 ) );\n\n\t\t}\n\n\t\tconst attributes = json.data.attributes;\n\n\t\tfor ( const key in attributes ) {\n\n\t\t\tconst attribute = attributes[ key ];\n\t\t\tlet bufferAttribute;\n\n\t\t\tif ( attribute.isInterleavedBufferAttribute ) {\n\n\t\t\t\tconst interleavedBuffer = getInterleavedBuffer( json.data, attribute.data );\n\t\t\t\tbufferAttribute = new InterleavedBufferAttribute( interleavedBuffer, attribute.itemSize, attribute.offset, attribute.normalized );\n\n\t\t\t} else {\n\n\t\t\t\tconst typedArray = getTypedArray( attribute.type, attribute.array );\n\t\t\t\tconst bufferAttributeConstr = attribute.isInstancedBufferAttribute ? InstancedBufferAttribute : BufferAttribute;\n\t\t\t\tbufferAttribute = new bufferAttributeConstr( typedArray, attribute.itemSize, attribute.normalized );\n\n\t\t\t}\n\n\t\t\tif ( attribute.name !== undefined ) bufferAttribute.name = attribute.name;\n\t\t\tgeometry.setAttribute( key, bufferAttribute );\n\n\t\t}\n\n\t\tconst morphAttributes = json.data.morphAttributes;\n\n\t\tif ( morphAttributes ) {\n\n\t\t\tfor ( const key in morphAttributes ) {\n\n\t\t\t\tconst attributeArray = morphAttributes[ key ];\n\n\t\t\t\tconst array = [];\n\n\t\t\t\tfor ( let i = 0, il = attributeArray.length; i < il; i ++ ) {\n\n\t\t\t\t\tconst attribute = attributeArray[ i ];\n\t\t\t\t\tlet bufferAttribute;\n\n\t\t\t\t\tif ( attribute.isInterleavedBufferAttribute ) {\n\n\t\t\t\t\t\tconst interleavedBuffer = getInterleavedBuffer( json.data, attribute.data );\n\t\t\t\t\t\tbufferAttribute = new InterleavedBufferAttribute( interleavedBuffer, attribute.itemSize, attribute.offset, attribute.normalized );\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\tconst typedArray = getTypedArray( attribute.type, attribute.array );\n\t\t\t\t\t\tbufferAttribute = new BufferAttribute( typedArray, attribute.itemSize, attribute.normalized );\n\n\t\t\t\t\t}\n\n\t\t\t\t\tif ( attribute.name !== undefined ) bufferAttribute.name = attribute.name;\n\t\t\t\t\tarray.push( bufferAttribute );\n\n\t\t\t\t}\n\n\t\t\t\tgeometry.morphAttributes[ key ] = array;\n\n\t\t\t}\n\n\t\t}\n\n\t\tconst morphTargetsRelative = json.data.morphTargetsRelative;\n\n\t\tif ( morphTargetsRelative ) {\n\n\t\t\tgeometry.morphTargetsRelative = true;\n\n\t\t}\n\n\t\tconst groups = json.data.groups || json.data.drawcalls || json.data.offsets;\n\n\t\tif ( groups !== undefined ) {\n\n\t\t\tfor ( let i = 0, n = groups.length; i !== n; ++ i ) {\n\n\t\t\t\tconst group = groups[ i ];\n\n\t\t\t\tgeometry.addGroup( group.start, group.count, group.materialIndex );\n\n\t\t\t}\n\n\t\t}\n\n\t\tconst boundingSphere = json.data.boundingSphere;\n\n\t\tif ( boundingSphere !== undefined ) {\n\n\t\t\tconst center = new Vector3();\n\n\t\t\tif ( boundingSphere.center !== undefined ) {\n\n\t\t\t\tcenter.fromArray( boundingSphere.center );\n\n\t\t\t}\n\n\t\t\tgeometry.boundingSphere = new Sphere( center, boundingSphere.radius );\n\n\t\t}\n\n\t\tif ( json.name ) geometry.name = json.name;\n\t\tif ( json.userData ) geometry.userData = json.userData;\n\n\t\treturn geometry;\n\n\t}\n\n} );\n\nclass ObjectLoader extends Loader {\n\n\tconstructor( manager ) {\n\n\t\tsuper( manager );\n\n\t}\n\n\tload( url, onLoad, onProgress, onError ) {\n\n\t\tconst scope = this;\n\n\t\tconst path = ( this.path === '' ) ? LoaderUtils.extractUrlBase( url ) : this.path;\n\t\tthis.resourcePath = this.resourcePath || path;\n\n\t\tconst loader = new FileLoader( this.manager );\n\t\tloader.setPath( this.path );\n\t\tloader.setRequestHeader( this.requestHeader );\n\t\tloader.setWithCredentials( this.withCredentials );\n\t\tloader.load( url, function ( text ) {\n\n\t\t\tlet json = null;\n\n\t\t\ttry {\n\n\t\t\t\tjson = JSON.parse( text );\n\n\t\t\t} catch ( error ) {\n\n\t\t\t\tif ( onError !== undefined ) onError( error );\n\n\t\t\t\tconsole.error( 'THREE:ObjectLoader: Can\\'t parse ' + url + '.', error.message );\n\n\t\t\t\treturn;\n\n\t\t\t}\n\n\t\t\tconst metadata = json.metadata;\n\n\t\t\tif ( metadata === undefined || metadata.type === undefined || metadata.type.toLowerCase() === 'geometry' ) {\n\n\t\t\t\tconsole.error( 'THREE.ObjectLoader: Can\\'t load ' + url );\n\t\t\t\treturn;\n\n\t\t\t}\n\n\t\t\tscope.parse( json, onLoad );\n\n\t\t}, onProgress, onError );\n\n\t}\n\n\tparse( json, onLoad ) {\n\n\t\tconst animations = this.parseAnimations( json.animations );\n\t\tconst shapes = this.parseShapes( json.shapes );\n\t\tconst geometries = this.parseGeometries( json.geometries, shapes );\n\n\t\tconst images = this.parseImages( json.images, function () {\n\n\t\t\tif ( onLoad !== undefined ) onLoad( object );\n\n\t\t} );\n\n\t\tconst textures = this.parseTextures( json.textures, images );\n\t\tconst materials = this.parseMaterials( json.materials, textures );\n\n\t\tconst object = this.parseObject( json.object, geometries, materials, animations );\n\t\tconst skeletons = this.parseSkeletons( json.skeletons, object );\n\n\t\tthis.bindSkeletons( object, skeletons );\n\n\t\t//\n\n\t\tif ( onLoad !== undefined ) {\n\n\t\t\tlet hasImages = false;\n\n\t\t\tfor ( const uuid in images ) {\n\n\t\t\t\tif ( images[ uuid ] instanceof HTMLImageElement ) {\n\n\t\t\t\t\thasImages = true;\n\t\t\t\t\tbreak;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tif ( hasImages === false ) onLoad( object );\n\n\t\t}\n\n\t\treturn object;\n\n\t}\n\n\tparseShapes( json ) {\n\n\t\tconst shapes = {};\n\n\t\tif ( json !== undefined ) {\n\n\t\t\tfor ( let i = 0, l = json.length; i < l; i ++ ) {\n\n\t\t\t\tconst shape = new Shape().fromJSON( json[ i ] );\n\n\t\t\t\tshapes[ shape.uuid ] = shape;\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn shapes;\n\n\t}\n\n\tparseSkeletons( json, object ) {\n\n\t\tconst skeletons = {};\n\t\tconst bones = {};\n\n\t\t// generate bone lookup table\n\n\t\tobject.traverse( function ( child ) {\n\n\t\t\tif ( child.isBone ) bones[ child.uuid ] = child;\n\n\t\t} );\n\n\t\t// create skeletons\n\n\t\tif ( json !== undefined ) {\n\n\t\t\tfor ( let i = 0, l = json.length; i < l; i ++ ) {\n\n\t\t\t\tconst skeleton = new Skeleton().fromJSON( json[ i ], bones );\n\n\t\t\t\tskeletons[ skeleton.uuid ] = skeleton;\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn skeletons;\n\n\t}\n\n\tparseGeometries( json, shapes ) {\n\n\t\tconst geometries = {};\n\t\tlet geometryShapes;\n\n\t\tif ( json !== undefined ) {\n\n\t\t\tconst bufferGeometryLoader = new BufferGeometryLoader();\n\n\t\t\tfor ( let i = 0, l = json.length; i < l; i ++ ) {\n\n\t\t\t\tlet geometry;\n\t\t\t\tconst data = json[ i ];\n\n\t\t\t\tswitch ( data.type ) {\n\n\t\t\t\t\tcase 'PlaneGeometry':\n\t\t\t\t\tcase 'PlaneBufferGeometry':\n\n\t\t\t\t\t\tgeometry = new Geometries[ data.type ](\n\t\t\t\t\t\t\tdata.width,\n\t\t\t\t\t\t\tdata.height,\n\t\t\t\t\t\t\tdata.widthSegments,\n\t\t\t\t\t\t\tdata.heightSegments\n\t\t\t\t\t\t);\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'BoxGeometry':\n\t\t\t\t\tcase 'BoxBufferGeometry':\n\n\t\t\t\t\t\tgeometry = new Geometries[ data.type ](\n\t\t\t\t\t\t\tdata.width,\n\t\t\t\t\t\t\tdata.height,\n\t\t\t\t\t\t\tdata.depth,\n\t\t\t\t\t\t\tdata.widthSegments,\n\t\t\t\t\t\t\tdata.heightSegments,\n\t\t\t\t\t\t\tdata.depthSegments\n\t\t\t\t\t\t);\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'CircleGeometry':\n\t\t\t\t\tcase 'CircleBufferGeometry':\n\n\t\t\t\t\t\tgeometry = new Geometries[ data.type ](\n\t\t\t\t\t\t\tdata.radius,\n\t\t\t\t\t\t\tdata.segments,\n\t\t\t\t\t\t\tdata.thetaStart,\n\t\t\t\t\t\t\tdata.thetaLength\n\t\t\t\t\t\t);\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'CylinderGeometry':\n\t\t\t\t\tcase 'CylinderBufferGeometry':\n\n\t\t\t\t\t\tgeometry = new Geometries[ data.type ](\n\t\t\t\t\t\t\tdata.radiusTop,\n\t\t\t\t\t\t\tdata.radiusBottom,\n\t\t\t\t\t\t\tdata.height,\n\t\t\t\t\t\t\tdata.radialSegments,\n\t\t\t\t\t\t\tdata.heightSegments,\n\t\t\t\t\t\t\tdata.openEnded,\n\t\t\t\t\t\t\tdata.thetaStart,\n\t\t\t\t\t\t\tdata.thetaLength\n\t\t\t\t\t\t);\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'ConeGeometry':\n\t\t\t\t\tcase 'ConeBufferGeometry':\n\n\t\t\t\t\t\tgeometry = new Geometries[ data.type ](\n\t\t\t\t\t\t\tdata.radius,\n\t\t\t\t\t\t\tdata.height,\n\t\t\t\t\t\t\tdata.radialSegments,\n\t\t\t\t\t\t\tdata.heightSegments,\n\t\t\t\t\t\t\tdata.openEnded,\n\t\t\t\t\t\t\tdata.thetaStart,\n\t\t\t\t\t\t\tdata.thetaLength\n\t\t\t\t\t\t);\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'SphereGeometry':\n\t\t\t\t\tcase 'SphereBufferGeometry':\n\n\t\t\t\t\t\tgeometry = new Geometries[ data.type ](\n\t\t\t\t\t\t\tdata.radius,\n\t\t\t\t\t\t\tdata.widthSegments,\n\t\t\t\t\t\t\tdata.heightSegments,\n\t\t\t\t\t\t\tdata.phiStart,\n\t\t\t\t\t\t\tdata.phiLength,\n\t\t\t\t\t\t\tdata.thetaStart,\n\t\t\t\t\t\t\tdata.thetaLength\n\t\t\t\t\t\t);\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'DodecahedronGeometry':\n\t\t\t\t\tcase 'DodecahedronBufferGeometry':\n\t\t\t\t\tcase 'IcosahedronGeometry':\n\t\t\t\t\tcase 'IcosahedronBufferGeometry':\n\t\t\t\t\tcase 'OctahedronGeometry':\n\t\t\t\t\tcase 'OctahedronBufferGeometry':\n\t\t\t\t\tcase 'TetrahedronGeometry':\n\t\t\t\t\tcase 'TetrahedronBufferGeometry':\n\n\t\t\t\t\t\tgeometry = new Geometries[ data.type ](\n\t\t\t\t\t\t\tdata.radius,\n\t\t\t\t\t\t\tdata.detail\n\t\t\t\t\t\t);\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'RingGeometry':\n\t\t\t\t\tcase 'RingBufferGeometry':\n\n\t\t\t\t\t\tgeometry = new Geometries[ data.type ](\n\t\t\t\t\t\t\tdata.innerRadius,\n\t\t\t\t\t\t\tdata.outerRadius,\n\t\t\t\t\t\t\tdata.thetaSegments,\n\t\t\t\t\t\t\tdata.phiSegments,\n\t\t\t\t\t\t\tdata.thetaStart,\n\t\t\t\t\t\t\tdata.thetaLength\n\t\t\t\t\t\t);\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'TorusGeometry':\n\t\t\t\t\tcase 'TorusBufferGeometry':\n\n\t\t\t\t\t\tgeometry = new Geometries[ data.type ](\n\t\t\t\t\t\t\tdata.radius,\n\t\t\t\t\t\t\tdata.tube,\n\t\t\t\t\t\t\tdata.radialSegments,\n\t\t\t\t\t\t\tdata.tubularSegments,\n\t\t\t\t\t\t\tdata.arc\n\t\t\t\t\t\t);\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'TorusKnotGeometry':\n\t\t\t\t\tcase 'TorusKnotBufferGeometry':\n\n\t\t\t\t\t\tgeometry = new Geometries[ data.type ](\n\t\t\t\t\t\t\tdata.radius,\n\t\t\t\t\t\t\tdata.tube,\n\t\t\t\t\t\t\tdata.tubularSegments,\n\t\t\t\t\t\t\tdata.radialSegments,\n\t\t\t\t\t\t\tdata.p,\n\t\t\t\t\t\t\tdata.q\n\t\t\t\t\t\t);\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'TubeGeometry':\n\t\t\t\t\tcase 'TubeBufferGeometry':\n\n\t\t\t\t\t\t// This only works for built-in curves (e.g. CatmullRomCurve3).\n\t\t\t\t\t\t// User defined curves or instances of CurvePath will not be deserialized.\n\t\t\t\t\t\tgeometry = new Geometries[ data.type ](\n\t\t\t\t\t\t\tnew Curves[ data.path.type ]().fromJSON( data.path ),\n\t\t\t\t\t\t\tdata.tubularSegments,\n\t\t\t\t\t\t\tdata.radius,\n\t\t\t\t\t\t\tdata.radialSegments,\n\t\t\t\t\t\t\tdata.closed\n\t\t\t\t\t\t);\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'LatheGeometry':\n\t\t\t\t\tcase 'LatheBufferGeometry':\n\n\t\t\t\t\t\tgeometry = new Geometries[ data.type ](\n\t\t\t\t\t\t\tdata.points,\n\t\t\t\t\t\t\tdata.segments,\n\t\t\t\t\t\t\tdata.phiStart,\n\t\t\t\t\t\t\tdata.phiLength\n\t\t\t\t\t\t);\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'PolyhedronGeometry':\n\t\t\t\t\tcase 'PolyhedronBufferGeometry':\n\n\t\t\t\t\t\tgeometry = new Geometries[ data.type ](\n\t\t\t\t\t\t\tdata.vertices,\n\t\t\t\t\t\t\tdata.indices,\n\t\t\t\t\t\t\tdata.radius,\n\t\t\t\t\t\t\tdata.details\n\t\t\t\t\t\t);\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'ShapeGeometry':\n\t\t\t\t\tcase 'ShapeBufferGeometry':\n\n\t\t\t\t\t\tgeometryShapes = [];\n\n\t\t\t\t\t\tfor ( let j = 0, jl = data.shapes.length; j < jl; j ++ ) {\n\n\t\t\t\t\t\t\tconst shape = shapes[ data.shapes[ j ] ];\n\n\t\t\t\t\t\t\tgeometryShapes.push( shape );\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tgeometry = new Geometries[ data.type ](\n\t\t\t\t\t\t\tgeometryShapes,\n\t\t\t\t\t\t\tdata.curveSegments\n\t\t\t\t\t\t);\n\n\t\t\t\t\t\tbreak;\n\n\n\t\t\t\t\tcase 'ExtrudeGeometry':\n\t\t\t\t\tcase 'ExtrudeBufferGeometry':\n\n\t\t\t\t\t\tgeometryShapes = [];\n\n\t\t\t\t\t\tfor ( let j = 0, jl = data.shapes.length; j < jl; j ++ ) {\n\n\t\t\t\t\t\t\tconst shape = shapes[ data.shapes[ j ] ];\n\n\t\t\t\t\t\t\tgeometryShapes.push( shape );\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tconst extrudePath = data.options.extrudePath;\n\n\t\t\t\t\t\tif ( extrudePath !== undefined ) {\n\n\t\t\t\t\t\t\tdata.options.extrudePath = new Curves[ extrudePath.type ]().fromJSON( extrudePath );\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tgeometry = new Geometries[ data.type ](\n\t\t\t\t\t\t\tgeometryShapes,\n\t\t\t\t\t\t\tdata.options\n\t\t\t\t\t\t);\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'BufferGeometry':\n\t\t\t\t\tcase 'InstancedBufferGeometry':\n\n\t\t\t\t\t\tgeometry = bufferGeometryLoader.parse( data );\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'Geometry':\n\n\t\t\t\t\t\tconsole.error( 'THREE.ObjectLoader: Loading \"Geometry\" is not supported anymore.' );\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tdefault:\n\n\t\t\t\t\t\tconsole.warn( 'THREE.ObjectLoader: Unsupported geometry type \"' + data.type + '\"' );\n\n\t\t\t\t\t\tcontinue;\n\n\t\t\t\t}\n\n\t\t\t\tgeometry.uuid = data.uuid;\n\n\t\t\t\tif ( data.name !== undefined ) geometry.name = data.name;\n\t\t\t\tif ( geometry.isBufferGeometry === true && data.userData !== undefined ) geometry.userData = data.userData;\n\n\t\t\t\tgeometries[ data.uuid ] = geometry;\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn geometries;\n\n\t}\n\n\tparseMaterials( json, textures ) {\n\n\t\tconst cache = {}; // MultiMaterial\n\t\tconst materials = {};\n\n\t\tif ( json !== undefined ) {\n\n\t\t\tconst loader = new MaterialLoader();\n\t\t\tloader.setTextures( textures );\n\n\t\t\tfor ( let i = 0, l = json.length; i < l; i ++ ) {\n\n\t\t\t\tconst data = json[ i ];\n\n\t\t\t\tif ( data.type === 'MultiMaterial' ) {\n\n\t\t\t\t\t// Deprecated\n\n\t\t\t\t\tconst array = [];\n\n\t\t\t\t\tfor ( let j = 0; j < data.materials.length; j ++ ) {\n\n\t\t\t\t\t\tconst material = data.materials[ j ];\n\n\t\t\t\t\t\tif ( cache[ material.uuid ] === undefined ) {\n\n\t\t\t\t\t\t\tcache[ material.uuid ] = loader.parse( material );\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tarray.push( cache[ material.uuid ] );\n\n\t\t\t\t\t}\n\n\t\t\t\t\tmaterials[ data.uuid ] = array;\n\n\t\t\t\t} else {\n\n\t\t\t\t\tif ( cache[ data.uuid ] === undefined ) {\n\n\t\t\t\t\t\tcache[ data.uuid ] = loader.parse( data );\n\n\t\t\t\t\t}\n\n\t\t\t\t\tmaterials[ data.uuid ] = cache[ data.uuid ];\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn materials;\n\n\t}\n\n\tparseAnimations( json ) {\n\n\t\tconst animations = {};\n\n\t\tif ( json !== undefined ) {\n\n\t\t\tfor ( let i = 0; i < json.length; i ++ ) {\n\n\t\t\t\tconst data = json[ i ];\n\n\t\t\t\tconst clip = AnimationClip.parse( data );\n\n\t\t\t\tanimations[ clip.uuid ] = clip;\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn animations;\n\n\t}\n\n\tparseImages( json, onLoad ) {\n\n\t\tconst scope = this;\n\t\tconst images = {};\n\n\t\tlet loader;\n\n\t\tfunction loadImage( url ) {\n\n\t\t\tscope.manager.itemStart( url );\n\n\t\t\treturn loader.load( url, function () {\n\n\t\t\t\tscope.manager.itemEnd( url );\n\n\t\t\t}, undefined, function () {\n\n\t\t\t\tscope.manager.itemError( url );\n\t\t\t\tscope.manager.itemEnd( url );\n\n\t\t\t} );\n\n\t\t}\n\n\t\tfunction deserializeImage( image ) {\n\n\t\t\tif ( typeof image === 'string' ) {\n\n\t\t\t\tconst url = image;\n\n\t\t\t\tconst path = /^(\\/\\/)|([a-z]+:(\\/\\/)?)/i.test( url ) ? url : scope.resourcePath + url;\n\n\t\t\t\treturn loadImage( path );\n\n\t\t\t} else {\n\n\t\t\t\tif ( image.data ) {\n\n\t\t\t\t\treturn {\n\t\t\t\t\t\tdata: getTypedArray( image.type, image.data ),\n\t\t\t\t\t\twidth: image.width,\n\t\t\t\t\t\theight: image.height\n\t\t\t\t\t};\n\n\t\t\t\t} else {\n\n\t\t\t\t\treturn null;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( json !== undefined && json.length > 0 ) {\n\n\t\t\tconst manager = new LoadingManager( onLoad );\n\n\t\t\tloader = new ImageLoader( manager );\n\t\t\tloader.setCrossOrigin( this.crossOrigin );\n\n\t\t\tfor ( let i = 0, il = json.length; i < il; i ++ ) {\n\n\t\t\t\tconst image = json[ i ];\n\t\t\t\tconst url = image.url;\n\n\t\t\t\tif ( Array.isArray( url ) ) {\n\n\t\t\t\t\t// load array of images e.g CubeTexture\n\n\t\t\t\t\timages[ image.uuid ] = [];\n\n\t\t\t\t\tfor ( let j = 0, jl = url.length; j < jl; j ++ ) {\n\n\t\t\t\t\t\tconst currentUrl = url[ j ];\n\n\t\t\t\t\t\tconst deserializedImage = deserializeImage( currentUrl );\n\n\t\t\t\t\t\tif ( deserializedImage !== null ) {\n\n\t\t\t\t\t\t\tif ( deserializedImage instanceof HTMLImageElement ) {\n\n\t\t\t\t\t\t\t\timages[ image.uuid ].push( deserializedImage );\n\n\t\t\t\t\t\t\t} else {\n\n\t\t\t\t\t\t\t\t// special case: handle array of data textures for cube textures\n\n\t\t\t\t\t\t\t\timages[ image.uuid ].push( new DataTexture( deserializedImage.data, deserializedImage.width, deserializedImage.height ) );\n\n\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t} else {\n\n\t\t\t\t\t// load single image\n\n\t\t\t\t\tconst deserializedImage = deserializeImage( image.url );\n\n\t\t\t\t\tif ( deserializedImage !== null ) {\n\n\t\t\t\t\t\timages[ image.uuid ] = deserializedImage;\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn images;\n\n\t}\n\n\tparseTextures( json, images ) {\n\n\t\tfunction parseConstant( value, type ) {\n\n\t\t\tif ( typeof value === 'number' ) return value;\n\n\t\t\tconsole.warn( 'THREE.ObjectLoader.parseTexture: Constant should be in numeric form.', value );\n\n\t\t\treturn type[ value ];\n\n\t\t}\n\n\t\tconst textures = {};\n\n\t\tif ( json !== undefined ) {\n\n\t\t\tfor ( let i = 0, l = json.length; i < l; i ++ ) {\n\n\t\t\t\tconst data = json[ i ];\n\n\t\t\t\tif ( data.image === undefined ) {\n\n\t\t\t\t\tconsole.warn( 'THREE.ObjectLoader: No \"image\" specified for', data.uuid );\n\n\t\t\t\t}\n\n\t\t\t\tif ( images[ data.image ] === undefined ) {\n\n\t\t\t\t\tconsole.warn( 'THREE.ObjectLoader: Undefined image', data.image );\n\n\t\t\t\t}\n\n\t\t\t\tlet texture;\n\t\t\t\tconst image = images[ data.image ];\n\n\t\t\t\tif ( Array.isArray( image ) ) {\n\n\t\t\t\t\ttexture = new CubeTexture( image );\n\n\t\t\t\t\tif ( image.length === 6 ) texture.needsUpdate = true;\n\n\t\t\t\t} else {\n\n\t\t\t\t\tif ( image && image.data ) {\n\n\t\t\t\t\t\ttexture = new DataTexture( image.data, image.width, image.height );\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\ttexture = new Texture( image );\n\n\t\t\t\t\t}\n\n\t\t\t\t\tif ( image ) texture.needsUpdate = true; // textures can have undefined image data\n\n\t\t\t\t}\n\n\t\t\t\ttexture.uuid = data.uuid;\n\n\t\t\t\tif ( data.name !== undefined ) texture.name = data.name;\n\n\t\t\t\tif ( data.mapping !== undefined ) texture.mapping = parseConstant( data.mapping, TEXTURE_MAPPING );\n\n\t\t\t\tif ( data.offset !== undefined ) texture.offset.fromArray( data.offset );\n\t\t\t\tif ( data.repeat !== undefined ) texture.repeat.fromArray( data.repeat );\n\t\t\t\tif ( data.center !== undefined ) texture.center.fromArray( data.center );\n\t\t\t\tif ( data.rotation !== undefined ) texture.rotation = data.rotation;\n\n\t\t\t\tif ( data.wrap !== undefined ) {\n\n\t\t\t\t\ttexture.wrapS = parseConstant( data.wrap[ 0 ], TEXTURE_WRAPPING );\n\t\t\t\t\ttexture.wrapT = parseConstant( data.wrap[ 1 ], TEXTURE_WRAPPING );\n\n\t\t\t\t}\n\n\t\t\t\tif ( data.format !== undefined ) texture.format = data.format;\n\t\t\t\tif ( data.type !== undefined ) texture.type = data.type;\n\t\t\t\tif ( data.encoding !== undefined ) texture.encoding = data.encoding;\n\n\t\t\t\tif ( data.minFilter !== undefined ) texture.minFilter = parseConstant( data.minFilter, TEXTURE_FILTER );\n\t\t\t\tif ( data.magFilter !== undefined ) texture.magFilter = parseConstant( data.magFilter, TEXTURE_FILTER );\n\t\t\t\tif ( data.anisotropy !== undefined ) texture.anisotropy = data.anisotropy;\n\n\t\t\t\tif ( data.flipY !== undefined ) texture.flipY = data.flipY;\n\n\t\t\t\tif ( data.premultiplyAlpha !== undefined ) texture.premultiplyAlpha = data.premultiplyAlpha;\n\t\t\t\tif ( data.unpackAlignment !== undefined ) texture.unpackAlignment = data.unpackAlignment;\n\n\t\t\t\ttextures[ data.uuid ] = texture;\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn textures;\n\n\t}\n\n\tparseObject( data, geometries, materials, animations ) {\n\n\t\tlet object;\n\n\t\tfunction getGeometry( name ) {\n\n\t\t\tif ( geometries[ name ] === undefined ) {\n\n\t\t\t\tconsole.warn( 'THREE.ObjectLoader: Undefined geometry', name );\n\n\t\t\t}\n\n\t\t\treturn geometries[ name ];\n\n\t\t}\n\n\t\tfunction getMaterial( name ) {\n\n\t\t\tif ( name === undefined ) return undefined;\n\n\t\t\tif ( Array.isArray( name ) ) {\n\n\t\t\t\tconst array = [];\n\n\t\t\t\tfor ( let i = 0, l = name.length; i < l; i ++ ) {\n\n\t\t\t\t\tconst uuid = name[ i ];\n\n\t\t\t\t\tif ( materials[ uuid ] === undefined ) {\n\n\t\t\t\t\t\tconsole.warn( 'THREE.ObjectLoader: Undefined material', uuid );\n\n\t\t\t\t\t}\n\n\t\t\t\t\tarray.push( materials[ uuid ] );\n\n\t\t\t\t}\n\n\t\t\t\treturn array;\n\n\t\t\t}\n\n\t\t\tif ( materials[ name ] === undefined ) {\n\n\t\t\t\tconsole.warn( 'THREE.ObjectLoader: Undefined material', name );\n\n\t\t\t}\n\n\t\t\treturn materials[ name ];\n\n\t\t}\n\n\t\tlet geometry, material;\n\n\t\tswitch ( data.type ) {\n\n\t\t\tcase 'Scene':\n\n\t\t\t\tobject = new Scene();\n\n\t\t\t\tif ( data.background !== undefined ) {\n\n\t\t\t\t\tif ( Number.isInteger( data.background ) ) {\n\n\t\t\t\t\t\tobject.background = new Color( data.background );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\tif ( data.fog !== undefined ) {\n\n\t\t\t\t\tif ( data.fog.type === 'Fog' ) {\n\n\t\t\t\t\t\tobject.fog = new Fog( data.fog.color, data.fog.near, data.fog.far );\n\n\t\t\t\t\t} else if ( data.fog.type === 'FogExp2' ) {\n\n\t\t\t\t\t\tobject.fog = new FogExp2( data.fog.color, data.fog.density );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'PerspectiveCamera':\n\n\t\t\t\tobject = new PerspectiveCamera( data.fov, data.aspect, data.near, data.far );\n\n\t\t\t\tif ( data.focus !== undefined ) object.focus = data.focus;\n\t\t\t\tif ( data.zoom !== undefined ) object.zoom = data.zoom;\n\t\t\t\tif ( data.filmGauge !== undefined ) object.filmGauge = data.filmGauge;\n\t\t\t\tif ( data.filmOffset !== undefined ) object.filmOffset = data.filmOffset;\n\t\t\t\tif ( data.view !== undefined ) object.view = Object.assign( {}, data.view );\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'OrthographicCamera':\n\n\t\t\t\tobject = new OrthographicCamera( data.left, data.right, data.top, data.bottom, data.near, data.far );\n\n\t\t\t\tif ( data.zoom !== undefined ) object.zoom = data.zoom;\n\t\t\t\tif ( data.view !== undefined ) object.view = Object.assign( {}, data.view );\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'AmbientLight':\n\n\t\t\t\tobject = new AmbientLight( data.color, data.intensity );\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'DirectionalLight':\n\n\t\t\t\tobject = new DirectionalLight( data.color, data.intensity );\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'PointLight':\n\n\t\t\t\tobject = new PointLight( data.color, data.intensity, data.distance, data.decay );\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'RectAreaLight':\n\n\t\t\t\tobject = new RectAreaLight( data.color, data.intensity, data.width, data.height );\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'SpotLight':\n\n\t\t\t\tobject = new SpotLight( data.color, data.intensity, data.distance, data.angle, data.penumbra, data.decay );\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'HemisphereLight':\n\n\t\t\t\tobject = new HemisphereLight( data.color, data.groundColor, data.intensity );\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'LightProbe':\n\n\t\t\t\tobject = new LightProbe().fromJSON( data );\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'SkinnedMesh':\n\n\t\t\t\tgeometry = getGeometry( data.geometry );\n\t\t\t \tmaterial = getMaterial( data.material );\n\n\t\t\t\tobject = new SkinnedMesh( geometry, material );\n\n\t\t\t\tif ( data.bindMode !== undefined ) object.bindMode = data.bindMode;\n\t\t\t\tif ( data.bindMatrix !== undefined ) object.bindMatrix.fromArray( data.bindMatrix );\n\t\t\t\tif ( data.skeleton !== undefined ) object.skeleton = data.skeleton;\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'Mesh':\n\n\t\t\t\tgeometry = getGeometry( data.geometry );\n\t\t\t\tmaterial = getMaterial( data.material );\n\n\t\t\t\tobject = new Mesh( geometry, material );\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'InstancedMesh':\n\n\t\t\t\tgeometry = getGeometry( data.geometry );\n\t\t\t\tmaterial = getMaterial( data.material );\n\t\t\t\tconst count = data.count;\n\t\t\t\tconst instanceMatrix = data.instanceMatrix;\n\n\t\t\t\tobject = new InstancedMesh( geometry, material, count );\n\t\t\t\tobject.instanceMatrix = new BufferAttribute( new Float32Array( instanceMatrix.array ), 16 );\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'LOD':\n\n\t\t\t\tobject = new LOD();\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'Line':\n\n\t\t\t\tobject = new Line( getGeometry( data.geometry ), getMaterial( data.material ) );\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'LineLoop':\n\n\t\t\t\tobject = new LineLoop( getGeometry( data.geometry ), getMaterial( data.material ) );\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'LineSegments':\n\n\t\t\t\tobject = new LineSegments( getGeometry( data.geometry ), getMaterial( data.material ) );\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'PointCloud':\n\t\t\tcase 'Points':\n\n\t\t\t\tobject = new Points( getGeometry( data.geometry ), getMaterial( data.material ) );\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'Sprite':\n\n\t\t\t\tobject = new Sprite( getMaterial( data.material ) );\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'Group':\n\n\t\t\t\tobject = new Group();\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'Bone':\n\n\t\t\t\tobject = new Bone();\n\n\t\t\t\tbreak;\n\n\t\t\tdefault:\n\n\t\t\t\tobject = new Object3D();\n\n\t\t}\n\n\t\tobject.uuid = data.uuid;\n\n\t\tif ( data.name !== undefined ) object.name = data.name;\n\n\t\tif ( data.matrix !== undefined ) {\n\n\t\t\tobject.matrix.fromArray( data.matrix );\n\n\t\t\tif ( data.matrixAutoUpdate !== undefined ) object.matrixAutoUpdate = data.matrixAutoUpdate;\n\t\t\tif ( object.matrixAutoUpdate ) object.matrix.decompose( object.position, object.quaternion, object.scale );\n\n\t\t} else {\n\n\t\t\tif ( data.position !== undefined ) object.position.fromArray( data.position );\n\t\t\tif ( data.rotation !== undefined ) object.rotation.fromArray( data.rotation );\n\t\t\tif ( data.quaternion !== undefined ) object.quaternion.fromArray( data.quaternion );\n\t\t\tif ( data.scale !== undefined ) object.scale.fromArray( data.scale );\n\n\t\t}\n\n\t\tif ( data.castShadow !== undefined ) object.castShadow = data.castShadow;\n\t\tif ( data.receiveShadow !== undefined ) object.receiveShadow = data.receiveShadow;\n\n\t\tif ( data.shadow ) {\n\n\t\t\tif ( data.shadow.bias !== undefined ) object.shadow.bias = data.shadow.bias;\n\t\t\tif ( data.shadow.normalBias !== undefined ) object.shadow.normalBias = data.shadow.normalBias;\n\t\t\tif ( data.shadow.radius !== undefined ) object.shadow.radius = data.shadow.radius;\n\t\t\tif ( data.shadow.mapSize !== undefined ) object.shadow.mapSize.fromArray( data.shadow.mapSize );\n\t\t\tif ( data.shadow.camera !== undefined ) object.shadow.camera = this.parseObject( data.shadow.camera );\n\n\t\t}\n\n\t\tif ( data.visible !== undefined ) object.visible = data.visible;\n\t\tif ( data.frustumCulled !== undefined ) object.frustumCulled = data.frustumCulled;\n\t\tif ( data.renderOrder !== undefined ) object.renderOrder = data.renderOrder;\n\t\tif ( data.userData !== undefined ) object.userData = data.userData;\n\t\tif ( data.layers !== undefined ) object.layers.mask = data.layers;\n\n\t\tif ( data.children !== undefined ) {\n\n\t\t\tconst children = data.children;\n\n\t\t\tfor ( let i = 0; i < children.length; i ++ ) {\n\n\t\t\t\tobject.add( this.parseObject( children[ i ], geometries, materials, animations ) );\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( data.animations !== undefined ) {\n\n\t\t\tconst objectAnimations = data.animations;\n\n\t\t\tfor ( let i = 0; i < objectAnimations.length; i ++ ) {\n\n\t\t\t\tconst uuid = objectAnimations[ i ];\n\n\t\t\t\tobject.animations.push( animations[ uuid ] );\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( data.type === 'LOD' ) {\n\n\t\t\tif ( data.autoUpdate !== undefined ) object.autoUpdate = data.autoUpdate;\n\n\t\t\tconst levels = data.levels;\n\n\t\t\tfor ( let l = 0; l < levels.length; l ++ ) {\n\n\t\t\t\tconst level = levels[ l ];\n\t\t\t\tconst child = object.getObjectByProperty( 'uuid', level.object );\n\n\t\t\t\tif ( child !== undefined ) {\n\n\t\t\t\t\tobject.addLevel( child, level.distance );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn object;\n\n\t}\n\n\tbindSkeletons( object, skeletons ) {\n\n\t\tif ( Object.keys( skeletons ).length === 0 ) return;\n\n\t\tobject.traverse( function ( child ) {\n\n\t\t\tif ( child.isSkinnedMesh === true && child.skeleton !== undefined ) {\n\n\t\t\t\tconst skeleton = skeletons[ child.skeleton ];\n\n\t\t\t\tif ( skeleton === undefined ) {\n\n\t\t\t\t\tconsole.warn( 'THREE.ObjectLoader: No skeleton found with UUID:', child.skeleton );\n\n\t\t\t\t} else {\n\n\t\t\t\t\tchild.bind( skeleton, child.bindMatrix );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t} );\n\n\t}\n\n\t/* DEPRECATED */\n\n\tsetTexturePath( value ) {\n\n\t\tconsole.warn( 'THREE.ObjectLoader: .setTexturePath() has been renamed to .setResourcePath().' );\n\t\treturn this.setResourcePath( value );\n\n\t}\n\n}\n\nconst TEXTURE_MAPPING = {\n\tUVMapping: UVMapping,\n\tCubeReflectionMapping: CubeReflectionMapping,\n\tCubeRefractionMapping: CubeRefractionMapping,\n\tEquirectangularReflectionMapping: EquirectangularReflectionMapping,\n\tEquirectangularRefractionMapping: EquirectangularRefractionMapping,\n\tCubeUVReflectionMapping: CubeUVReflectionMapping,\n\tCubeUVRefractionMapping: CubeUVRefractionMapping\n};\n\nconst TEXTURE_WRAPPING = {\n\tRepeatWrapping: RepeatWrapping,\n\tClampToEdgeWrapping: ClampToEdgeWrapping,\n\tMirroredRepeatWrapping: MirroredRepeatWrapping\n};\n\nconst TEXTURE_FILTER = {\n\tNearestFilter: NearestFilter,\n\tNearestMipmapNearestFilter: NearestMipmapNearestFilter,\n\tNearestMipmapLinearFilter: NearestMipmapLinearFilter,\n\tLinearFilter: LinearFilter,\n\tLinearMipmapNearestFilter: LinearMipmapNearestFilter,\n\tLinearMipmapLinearFilter: LinearMipmapLinearFilter\n};\n\nfunction ImageBitmapLoader( manager ) {\n\n\tif ( typeof createImageBitmap === 'undefined' ) {\n\n\t\tconsole.warn( 'THREE.ImageBitmapLoader: createImageBitmap() not supported.' );\n\n\t}\n\n\tif ( typeof fetch === 'undefined' ) {\n\n\t\tconsole.warn( 'THREE.ImageBitmapLoader: fetch() not supported.' );\n\n\t}\n\n\tLoader.call( this, manager );\n\n\tthis.options = { premultiplyAlpha: 'none' };\n\n}\n\nImageBitmapLoader.prototype = Object.assign( Object.create( Loader.prototype ), {\n\n\tconstructor: ImageBitmapLoader,\n\n\tisImageBitmapLoader: true,\n\n\tsetOptions: function setOptions( options ) {\n\n\t\tthis.options = options;\n\n\t\treturn this;\n\n\t},\n\n\tload: function ( url, onLoad, onProgress, onError ) {\n\n\t\tif ( url === undefined ) url = '';\n\n\t\tif ( this.path !== undefined ) url = this.path + url;\n\n\t\turl = this.manager.resolveURL( url );\n\n\t\tconst scope = this;\n\n\t\tconst cached = Cache.get( url );\n\n\t\tif ( cached !== undefined ) {\n\n\t\t\tscope.manager.itemStart( url );\n\n\t\t\tsetTimeout( function () {\n\n\t\t\t\tif ( onLoad ) onLoad( cached );\n\n\t\t\t\tscope.manager.itemEnd( url );\n\n\t\t\t}, 0 );\n\n\t\t\treturn cached;\n\n\t\t}\n\n\t\tconst fetchOptions = {};\n\t\tfetchOptions.credentials = ( this.crossOrigin === 'anonymous' ) ? 'same-origin' : 'include';\n\n\t\tfetch( url, fetchOptions ).then( function ( res ) {\n\n\t\t\treturn res.blob();\n\n\t\t} ).then( function ( blob ) {\n\n\t\t\treturn createImageBitmap( blob, scope.options );\n\n\t\t} ).then( function ( imageBitmap ) {\n\n\t\t\tCache.add( url, imageBitmap );\n\n\t\t\tif ( onLoad ) onLoad( imageBitmap );\n\n\t\t\tscope.manager.itemEnd( url );\n\n\t\t} ).catch( function ( e ) {\n\n\t\t\tif ( onError ) onError( e );\n\n\t\t\tscope.manager.itemError( url );\n\t\t\tscope.manager.itemEnd( url );\n\n\t\t} );\n\n\t\tscope.manager.itemStart( url );\n\n\t}\n\n} );\n\nfunction ShapePath() {\n\n\tthis.type = 'ShapePath';\n\n\tthis.color = new Color();\n\n\tthis.subPaths = [];\n\tthis.currentPath = null;\n\n}\n\nObject.assign( ShapePath.prototype, {\n\n\tmoveTo: function ( x, y ) {\n\n\t\tthis.currentPath = new Path();\n\t\tthis.subPaths.push( this.currentPath );\n\t\tthis.currentPath.moveTo( x, y );\n\n\t\treturn this;\n\n\t},\n\n\tlineTo: function ( x, y ) {\n\n\t\tthis.currentPath.lineTo( x, y );\n\n\t\treturn this;\n\n\t},\n\n\tquadraticCurveTo: function ( aCPx, aCPy, aX, aY ) {\n\n\t\tthis.currentPath.quadraticCurveTo( aCPx, aCPy, aX, aY );\n\n\t\treturn this;\n\n\t},\n\n\tbezierCurveTo: function ( aCP1x, aCP1y, aCP2x, aCP2y, aX, aY ) {\n\n\t\tthis.currentPath.bezierCurveTo( aCP1x, aCP1y, aCP2x, aCP2y, aX, aY );\n\n\t\treturn this;\n\n\t},\n\n\tsplineThru: function ( pts ) {\n\n\t\tthis.currentPath.splineThru( pts );\n\n\t\treturn this;\n\n\t},\n\n\ttoShapes: function ( isCCW, noHoles ) {\n\n\t\tfunction toShapesNoHoles( inSubpaths ) {\n\n\t\t\tconst shapes = [];\n\n\t\t\tfor ( let i = 0, l = inSubpaths.length; i < l; i ++ ) {\n\n\t\t\t\tconst tmpPath = inSubpaths[ i ];\n\n\t\t\t\tconst tmpShape = new Shape();\n\t\t\t\ttmpShape.curves = tmpPath.curves;\n\n\t\t\t\tshapes.push( tmpShape );\n\n\t\t\t}\n\n\t\t\treturn shapes;\n\n\t\t}\n\n\t\tfunction isPointInsidePolygon( inPt, inPolygon ) {\n\n\t\t\tconst polyLen = inPolygon.length;\n\n\t\t\t// inPt on polygon contour => immediate success    or\n\t\t\t// toggling of inside/outside at every single! intersection point of an edge\n\t\t\t//  with the horizontal line through inPt, left of inPt\n\t\t\t//  not counting lowerY endpoints of edges and whole edges on that line\n\t\t\tlet inside = false;\n\t\t\tfor ( let p = polyLen - 1, q = 0; q < polyLen; p = q ++ ) {\n\n\t\t\t\tlet edgeLowPt = inPolygon[ p ];\n\t\t\t\tlet edgeHighPt = inPolygon[ q ];\n\n\t\t\t\tlet edgeDx = edgeHighPt.x - edgeLowPt.x;\n\t\t\t\tlet edgeDy = edgeHighPt.y - edgeLowPt.y;\n\n\t\t\t\tif ( Math.abs( edgeDy ) > Number.EPSILON ) {\n\n\t\t\t\t\t// not parallel\n\t\t\t\t\tif ( edgeDy < 0 ) {\n\n\t\t\t\t\t\tedgeLowPt = inPolygon[ q ]; edgeDx = - edgeDx;\n\t\t\t\t\t\tedgeHighPt = inPolygon[ p ]; edgeDy = - edgeDy;\n\n\t\t\t\t\t}\n\n\t\t\t\t\tif ( ( inPt.y < edgeLowPt.y ) || ( inPt.y > edgeHighPt.y ) ) \t\tcontinue;\n\n\t\t\t\t\tif ( inPt.y === edgeLowPt.y ) {\n\n\t\t\t\t\t\tif ( inPt.x === edgeLowPt.x )\t\treturn\ttrue;\t\t// inPt is on contour ?\n\t\t\t\t\t\t// continue;\t\t\t\t// no intersection or edgeLowPt => doesn't count !!!\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\tconst perpEdge = edgeDy * ( inPt.x - edgeLowPt.x ) - edgeDx * ( inPt.y - edgeLowPt.y );\n\t\t\t\t\t\tif ( perpEdge === 0 )\t\t\t\treturn\ttrue;\t\t// inPt is on contour ?\n\t\t\t\t\t\tif ( perpEdge < 0 ) \t\t\t\tcontinue;\n\t\t\t\t\t\tinside = ! inside;\t\t// true intersection left of inPt\n\n\t\t\t\t\t}\n\n\t\t\t\t} else {\n\n\t\t\t\t\t// parallel or collinear\n\t\t\t\t\tif ( inPt.y !== edgeLowPt.y ) \t\tcontinue;\t\t\t// parallel\n\t\t\t\t\t// edge lies on the same horizontal line as inPt\n\t\t\t\t\tif ( ( ( edgeHighPt.x <= inPt.x ) && ( inPt.x <= edgeLowPt.x ) ) ||\n\t\t\t\t\t\t ( ( edgeLowPt.x <= inPt.x ) && ( inPt.x <= edgeHighPt.x ) ) )\t\treturn\ttrue;\t// inPt: Point on contour !\n\t\t\t\t\t// continue;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\treturn\tinside;\n\n\t\t}\n\n\t\tconst isClockWise = ShapeUtils.isClockWise;\n\n\t\tconst subPaths = this.subPaths;\n\t\tif ( subPaths.length === 0 ) return [];\n\n\t\tif ( noHoles === true )\treturn\ttoShapesNoHoles( subPaths );\n\n\n\t\tlet solid, tmpPath, tmpShape;\n\t\tconst shapes = [];\n\n\t\tif ( subPaths.length === 1 ) {\n\n\t\t\ttmpPath = subPaths[ 0 ];\n\t\t\ttmpShape = new Shape();\n\t\t\ttmpShape.curves = tmpPath.curves;\n\t\t\tshapes.push( tmpShape );\n\t\t\treturn shapes;\n\n\t\t}\n\n\t\tlet holesFirst = ! isClockWise( subPaths[ 0 ].getPoints() );\n\t\tholesFirst = isCCW ? ! holesFirst : holesFirst;\n\n\t\t// console.log(\"Holes first\", holesFirst);\n\n\t\tconst betterShapeHoles = [];\n\t\tconst newShapes = [];\n\t\tlet newShapeHoles = [];\n\t\tlet mainIdx = 0;\n\t\tlet tmpPoints;\n\n\t\tnewShapes[ mainIdx ] = undefined;\n\t\tnewShapeHoles[ mainIdx ] = [];\n\n\t\tfor ( let i = 0, l = subPaths.length; i < l; i ++ ) {\n\n\t\t\ttmpPath = subPaths[ i ];\n\t\t\ttmpPoints = tmpPath.getPoints();\n\t\t\tsolid = isClockWise( tmpPoints );\n\t\t\tsolid = isCCW ? ! solid : solid;\n\n\t\t\tif ( solid ) {\n\n\t\t\t\tif ( ( ! holesFirst ) && ( newShapes[ mainIdx ] ) )\tmainIdx ++;\n\n\t\t\t\tnewShapes[ mainIdx ] = { s: new Shape(), p: tmpPoints };\n\t\t\t\tnewShapes[ mainIdx ].s.curves = tmpPath.curves;\n\n\t\t\t\tif ( holesFirst )\tmainIdx ++;\n\t\t\t\tnewShapeHoles[ mainIdx ] = [];\n\n\t\t\t\t//console.log('cw', i);\n\n\t\t\t} else {\n\n\t\t\t\tnewShapeHoles[ mainIdx ].push( { h: tmpPath, p: tmpPoints[ 0 ] } );\n\n\t\t\t\t//console.log('ccw', i);\n\n\t\t\t}\n\n\t\t}\n\n\t\t// only Holes? -> probably all Shapes with wrong orientation\n\t\tif ( ! newShapes[ 0 ] )\treturn\ttoShapesNoHoles( subPaths );\n\n\n\t\tif ( newShapes.length > 1 ) {\n\n\t\t\tlet ambiguous = false;\n\t\t\tconst toChange = [];\n\n\t\t\tfor ( let sIdx = 0, sLen = newShapes.length; sIdx < sLen; sIdx ++ ) {\n\n\t\t\t\tbetterShapeHoles[ sIdx ] = [];\n\n\t\t\t}\n\n\t\t\tfor ( let sIdx = 0, sLen = newShapes.length; sIdx < sLen; sIdx ++ ) {\n\n\t\t\t\tconst sho = newShapeHoles[ sIdx ];\n\n\t\t\t\tfor ( let hIdx = 0; hIdx < sho.length; hIdx ++ ) {\n\n\t\t\t\t\tconst ho = sho[ hIdx ];\n\t\t\t\t\tlet hole_unassigned = true;\n\n\t\t\t\t\tfor ( let s2Idx = 0; s2Idx < newShapes.length; s2Idx ++ ) {\n\n\t\t\t\t\t\tif ( isPointInsidePolygon( ho.p, newShapes[ s2Idx ].p ) ) {\n\n\t\t\t\t\t\t\tif ( sIdx !== s2Idx )\ttoChange.push( { froms: sIdx, tos: s2Idx, hole: hIdx } );\n\t\t\t\t\t\t\tif ( hole_unassigned ) {\n\n\t\t\t\t\t\t\t\thole_unassigned = false;\n\t\t\t\t\t\t\t\tbetterShapeHoles[ s2Idx ].push( ho );\n\n\t\t\t\t\t\t\t} else {\n\n\t\t\t\t\t\t\t\tambiguous = true;\n\n\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t\tif ( hole_unassigned ) {\n\n\t\t\t\t\t\tbetterShapeHoles[ sIdx ].push( ho );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\t\t\t// console.log(\"ambiguous: \", ambiguous);\n\n\t\t\tif ( toChange.length > 0 ) {\n\n\t\t\t\t// console.log(\"to change: \", toChange);\n\t\t\t\tif ( ! ambiguous )\tnewShapeHoles = betterShapeHoles;\n\n\t\t\t}\n\n\t\t}\n\n\t\tlet tmpHoles;\n\n\t\tfor ( let i = 0, il = newShapes.length; i < il; i ++ ) {\n\n\t\t\ttmpShape = newShapes[ i ].s;\n\t\t\tshapes.push( tmpShape );\n\t\t\ttmpHoles = newShapeHoles[ i ];\n\n\t\t\tfor ( let j = 0, jl = tmpHoles.length; j < jl; j ++ ) {\n\n\t\t\t\ttmpShape.holes.push( tmpHoles[ j ].h );\n\n\t\t\t}\n\n\t\t}\n\n\t\t//console.log(\"shape\", shapes);\n\n\t\treturn shapes;\n\n\t}\n\n} );\n\nclass Font {\n\n\tconstructor( data ) {\n\n\t\tObject.defineProperty( this, 'isFont', { value: true } );\n\n\t\tthis.type = 'Font';\n\n\t\tthis.data = data;\n\n\t}\n\n\tgenerateShapes( text, size = 100 ) {\n\n\t\tconst shapes = [];\n\t\tconst paths = createPaths( text, size, this.data );\n\n\t\tfor ( let p = 0, pl = paths.length; p < pl; p ++ ) {\n\n\t\t\tArray.prototype.push.apply( shapes, paths[ p ].toShapes() );\n\n\t\t}\n\n\t\treturn shapes;\n\n\t}\n\n}\n\nfunction createPaths( text, size, data ) {\n\n\tconst chars = Array.from ? Array.from( text ) : String( text ).split( '' ); // workaround for IE11, see #13988\n\tconst scale = size / data.resolution;\n\tconst line_height = ( data.boundingBox.yMax - data.boundingBox.yMin + data.underlineThickness ) * scale;\n\n\tconst paths = [];\n\n\tlet offsetX = 0, offsetY = 0;\n\n\tfor ( let i = 0; i < chars.length; i ++ ) {\n\n\t\tconst char = chars[ i ];\n\n\t\tif ( char === '\\n' ) {\n\n\t\t\toffsetX = 0;\n\t\t\toffsetY -= line_height;\n\n\t\t} else {\n\n\t\t\tconst ret = createPath( char, scale, offsetX, offsetY, data );\n\t\t\toffsetX += ret.offsetX;\n\t\t\tpaths.push( ret.path );\n\n\t\t}\n\n\t}\n\n\treturn paths;\n\n}\n\nfunction createPath( char, scale, offsetX, offsetY, data ) {\n\n\tconst glyph = data.glyphs[ char ] || data.glyphs[ '?' ];\n\n\tif ( ! glyph ) {\n\n\t\tconsole.error( 'THREE.Font: character \"' + char + '\" does not exists in font family ' + data.familyName + '.' );\n\n\t\treturn;\n\n\t}\n\n\tconst path = new ShapePath();\n\n\tlet x, y, cpx, cpy, cpx1, cpy1, cpx2, cpy2;\n\n\tif ( glyph.o ) {\n\n\t\tconst outline = glyph._cachedOutline || ( glyph._cachedOutline = glyph.o.split( ' ' ) );\n\n\t\tfor ( let i = 0, l = outline.length; i < l; ) {\n\n\t\t\tconst action = outline[ i ++ ];\n\n\t\t\tswitch ( action ) {\n\n\t\t\t\tcase 'm': // moveTo\n\n\t\t\t\t\tx = outline[ i ++ ] * scale + offsetX;\n\t\t\t\t\ty = outline[ i ++ ] * scale + offsetY;\n\n\t\t\t\t\tpath.moveTo( x, y );\n\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase 'l': // lineTo\n\n\t\t\t\t\tx = outline[ i ++ ] * scale + offsetX;\n\t\t\t\t\ty = outline[ i ++ ] * scale + offsetY;\n\n\t\t\t\t\tpath.lineTo( x, y );\n\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase 'q': // quadraticCurveTo\n\n\t\t\t\t\tcpx = outline[ i ++ ] * scale + offsetX;\n\t\t\t\t\tcpy = outline[ i ++ ] * scale + offsetY;\n\t\t\t\t\tcpx1 = outline[ i ++ ] * scale + offsetX;\n\t\t\t\t\tcpy1 = outline[ i ++ ] * scale + offsetY;\n\n\t\t\t\t\tpath.quadraticCurveTo( cpx1, cpy1, cpx, cpy );\n\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase 'b': // bezierCurveTo\n\n\t\t\t\t\tcpx = outline[ i ++ ] * scale + offsetX;\n\t\t\t\t\tcpy = outline[ i ++ ] * scale + offsetY;\n\t\t\t\t\tcpx1 = outline[ i ++ ] * scale + offsetX;\n\t\t\t\t\tcpy1 = outline[ i ++ ] * scale + offsetY;\n\t\t\t\t\tcpx2 = outline[ i ++ ] * scale + offsetX;\n\t\t\t\t\tcpy2 = outline[ i ++ ] * scale + offsetY;\n\n\t\t\t\t\tpath.bezierCurveTo( cpx1, cpy1, cpx2, cpy2, cpx, cpy );\n\n\t\t\t\t\tbreak;\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\treturn { offsetX: glyph.ha * scale, path: path };\n\n}\n\nfunction FontLoader( manager ) {\n\n\tLoader.call( this, manager );\n\n}\n\nFontLoader.prototype = Object.assign( Object.create( Loader.prototype ), {\n\n\tconstructor: FontLoader,\n\n\tload: function ( url, onLoad, onProgress, onError ) {\n\n\t\tconst scope = this;\n\n\t\tconst loader = new FileLoader( this.manager );\n\t\tloader.setPath( this.path );\n\t\tloader.setRequestHeader( this.requestHeader );\n\t\tloader.setWithCredentials( scope.withCredentials );\n\t\tloader.load( url, function ( text ) {\n\n\t\t\tlet json;\n\n\t\t\ttry {\n\n\t\t\t\tjson = JSON.parse( text );\n\n\t\t\t} catch ( e ) {\n\n\t\t\t\tconsole.warn( 'THREE.FontLoader: typeface.js support is being deprecated. Use typeface.json instead.' );\n\t\t\t\tjson = JSON.parse( text.substring( 65, text.length - 2 ) );\n\n\t\t\t}\n\n\t\t\tconst font = scope.parse( json );\n\n\t\t\tif ( onLoad ) onLoad( font );\n\n\t\t}, onProgress, onError );\n\n\t},\n\n\tparse: function ( json ) {\n\n\t\treturn new Font( json );\n\n\t}\n\n} );\n\nlet _context;\n\nconst AudioContext = {\n\n\tgetContext: function () {\n\n\t\tif ( _context === undefined ) {\n\n\t\t\t_context = new ( window.AudioContext || window.webkitAudioContext )();\n\n\t\t}\n\n\t\treturn _context;\n\n\t},\n\n\tsetContext: function ( value ) {\n\n\t\t_context = value;\n\n\t}\n\n};\n\nfunction AudioLoader( manager ) {\n\n\tLoader.call( this, manager );\n\n}\n\nAudioLoader.prototype = Object.assign( Object.create( Loader.prototype ), {\n\n\tconstructor: AudioLoader,\n\n\tload: function ( url, onLoad, onProgress, onError ) {\n\n\t\tconst scope = this;\n\n\t\tconst loader = new FileLoader( scope.manager );\n\t\tloader.setResponseType( 'arraybuffer' );\n\t\tloader.setPath( scope.path );\n\t\tloader.setRequestHeader( scope.requestHeader );\n\t\tloader.setWithCredentials( scope.withCredentials );\n\t\tloader.load( url, function ( buffer ) {\n\n\t\t\ttry {\n\n\t\t\t\t// Create a copy of the buffer. The `decodeAudioData` method\n\t\t\t\t// detaches the buffer when complete, preventing reuse.\n\t\t\t\tconst bufferCopy = buffer.slice( 0 );\n\n\t\t\t\tconst context = AudioContext.getContext();\n\t\t\t\tcontext.decodeAudioData( bufferCopy, function ( audioBuffer ) {\n\n\t\t\t\t\tonLoad( audioBuffer );\n\n\t\t\t\t} );\n\n\t\t\t} catch ( e ) {\n\n\t\t\t\tif ( onError ) {\n\n\t\t\t\t\tonError( e );\n\n\t\t\t\t} else {\n\n\t\t\t\t\tconsole.error( e );\n\n\t\t\t\t}\n\n\t\t\t\tscope.manager.itemError( url );\n\n\t\t\t}\n\n\t\t}, onProgress, onError );\n\n\t}\n\n} );\n\nfunction HemisphereLightProbe( skyColor, groundColor, intensity ) {\n\n\tLightProbe.call( this, undefined, intensity );\n\n\tconst color1 = new Color().set( skyColor );\n\tconst color2 = new Color().set( groundColor );\n\n\tconst sky = new Vector3( color1.r, color1.g, color1.b );\n\tconst ground = new Vector3( color2.r, color2.g, color2.b );\n\n\t// without extra factor of PI in the shader, should = 1 / Math.sqrt( Math.PI );\n\tconst c0 = Math.sqrt( Math.PI );\n\tconst c1 = c0 * Math.sqrt( 0.75 );\n\n\tthis.sh.coefficients[ 0 ].copy( sky ).add( ground ).multiplyScalar( c0 );\n\tthis.sh.coefficients[ 1 ].copy( sky ).sub( ground ).multiplyScalar( c1 );\n\n}\n\nHemisphereLightProbe.prototype = Object.assign( Object.create( LightProbe.prototype ), {\n\n\tconstructor: HemisphereLightProbe,\n\n\tisHemisphereLightProbe: true,\n\n\tcopy: function ( source ) { // modifying colors not currently supported\n\n\t\tLightProbe.prototype.copy.call( this, source );\n\n\t\treturn this;\n\n\t},\n\n\ttoJSON: function ( meta ) {\n\n\t\tconst data = LightProbe.prototype.toJSON.call( this, meta );\n\n\t\t// data.sh = this.sh.toArray(); // todo\n\n\t\treturn data;\n\n\t}\n\n} );\n\nfunction AmbientLightProbe( color, intensity ) {\n\n\tLightProbe.call( this, undefined, intensity );\n\n\tconst color1 = new Color().set( color );\n\n\t// without extra factor of PI in the shader, would be 2 / Math.sqrt( Math.PI );\n\tthis.sh.coefficients[ 0 ].set( color1.r, color1.g, color1.b ).multiplyScalar( 2 * Math.sqrt( Math.PI ) );\n\n}\n\nAmbientLightProbe.prototype = Object.assign( Object.create( LightProbe.prototype ), {\n\n\tconstructor: AmbientLightProbe,\n\n\tisAmbientLightProbe: true,\n\n\tcopy: function ( source ) { // modifying color not currently supported\n\n\t\tLightProbe.prototype.copy.call( this, source );\n\n\t\treturn this;\n\n\t},\n\n\ttoJSON: function ( meta ) {\n\n\t\tconst data = LightProbe.prototype.toJSON.call( this, meta );\n\n\t\t// data.sh = this.sh.toArray(); // todo\n\n\t\treturn data;\n\n\t}\n\n} );\n\nconst _eyeRight = new Matrix4();\nconst _eyeLeft = new Matrix4();\n\nfunction StereoCamera() {\n\n\tthis.type = 'StereoCamera';\n\n\tthis.aspect = 1;\n\n\tthis.eyeSep = 0.064;\n\n\tthis.cameraL = new PerspectiveCamera();\n\tthis.cameraL.layers.enable( 1 );\n\tthis.cameraL.matrixAutoUpdate = false;\n\n\tthis.cameraR = new PerspectiveCamera();\n\tthis.cameraR.layers.enable( 2 );\n\tthis.cameraR.matrixAutoUpdate = false;\n\n\tthis._cache = {\n\t\tfocus: null,\n\t\tfov: null,\n\t\taspect: null,\n\t\tnear: null,\n\t\tfar: null,\n\t\tzoom: null,\n\t\teyeSep: null\n\t};\n\n}\n\nObject.assign( StereoCamera.prototype, {\n\n\tupdate: function ( camera ) {\n\n\t\tconst cache = this._cache;\n\n\t\tconst needsUpdate = cache.focus !== camera.focus || cache.fov !== camera.fov ||\n\t\t\tcache.aspect !== camera.aspect * this.aspect || cache.near !== camera.near ||\n\t\t\tcache.far !== camera.far || cache.zoom !== camera.zoom || cache.eyeSep !== this.eyeSep;\n\n\t\tif ( needsUpdate ) {\n\n\t\t\tcache.focus = camera.focus;\n\t\t\tcache.fov = camera.fov;\n\t\t\tcache.aspect = camera.aspect * this.aspect;\n\t\t\tcache.near = camera.near;\n\t\t\tcache.far = camera.far;\n\t\t\tcache.zoom = camera.zoom;\n\t\t\tcache.eyeSep = this.eyeSep;\n\n\t\t\t// Off-axis stereoscopic effect based on\n\t\t\t// http://paulbourke.net/stereographics/stereorender/\n\n\t\t\tconst projectionMatrix = camera.projectionMatrix.clone();\n\t\t\tconst eyeSepHalf = cache.eyeSep / 2;\n\t\t\tconst eyeSepOnProjection = eyeSepHalf * cache.near / cache.focus;\n\t\t\tconst ymax = ( cache.near * Math.tan( MathUtils.DEG2RAD * cache.fov * 0.5 ) ) / cache.zoom;\n\t\t\tlet xmin, xmax;\n\n\t\t\t// translate xOffset\n\n\t\t\t_eyeLeft.elements[ 12 ] = - eyeSepHalf;\n\t\t\t_eyeRight.elements[ 12 ] = eyeSepHalf;\n\n\t\t\t// for left eye\n\n\t\t\txmin = - ymax * cache.aspect + eyeSepOnProjection;\n\t\t\txmax = ymax * cache.aspect + eyeSepOnProjection;\n\n\t\t\tprojectionMatrix.elements[ 0 ] = 2 * cache.near / ( xmax - xmin );\n\t\t\tprojectionMatrix.elements[ 8 ] = ( xmax + xmin ) / ( xmax - xmin );\n\n\t\t\tthis.cameraL.projectionMatrix.copy( projectionMatrix );\n\n\t\t\t// for right eye\n\n\t\t\txmin = - ymax * cache.aspect - eyeSepOnProjection;\n\t\t\txmax = ymax * cache.aspect - eyeSepOnProjection;\n\n\t\t\tprojectionMatrix.elements[ 0 ] = 2 * cache.near / ( xmax - xmin );\n\t\t\tprojectionMatrix.elements[ 8 ] = ( xmax + xmin ) / ( xmax - xmin );\n\n\t\t\tthis.cameraR.projectionMatrix.copy( projectionMatrix );\n\n\t\t}\n\n\t\tthis.cameraL.matrixWorld.copy( camera.matrixWorld ).multiply( _eyeLeft );\n\t\tthis.cameraR.matrixWorld.copy( camera.matrixWorld ).multiply( _eyeRight );\n\n\t}\n\n} );\n\nclass Clock {\n\n\tconstructor( autoStart ) {\n\n\t\tthis.autoStart = ( autoStart !== undefined ) ? autoStart : true;\n\n\t\tthis.startTime = 0;\n\t\tthis.oldTime = 0;\n\t\tthis.elapsedTime = 0;\n\n\t\tthis.running = false;\n\n\t}\n\n\tstart() {\n\n\t\tthis.startTime = now();\n\n\t\tthis.oldTime = this.startTime;\n\t\tthis.elapsedTime = 0;\n\t\tthis.running = true;\n\n\t}\n\n\tstop() {\n\n\t\tthis.getElapsedTime();\n\t\tthis.running = false;\n\t\tthis.autoStart = false;\n\n\t}\n\n\tgetElapsedTime() {\n\n\t\tthis.getDelta();\n\t\treturn this.elapsedTime;\n\n\t}\n\n\tgetDelta() {\n\n\t\tlet diff = 0;\n\n\t\tif ( this.autoStart && ! this.running ) {\n\n\t\t\tthis.start();\n\t\t\treturn 0;\n\n\t\t}\n\n\t\tif ( this.running ) {\n\n\t\t\tconst newTime = now();\n\n\t\t\tdiff = ( newTime - this.oldTime ) / 1000;\n\t\t\tthis.oldTime = newTime;\n\n\t\t\tthis.elapsedTime += diff;\n\n\t\t}\n\n\t\treturn diff;\n\n\t}\n\n}\n\nfunction now() {\n\n\treturn ( typeof performance === 'undefined' ? Date : performance ).now(); // see #10732\n\n}\n\nconst _position$2 = /*@__PURE__*/ new Vector3();\nconst _quaternion$3 = /*@__PURE__*/ new Quaternion();\nconst _scale$1 = /*@__PURE__*/ new Vector3();\nconst _orientation = /*@__PURE__*/ new Vector3();\n\nclass AudioListener extends Object3D {\n\n\tconstructor() {\n\n\t\tsuper();\n\n\t\tthis.type = 'AudioListener';\n\n\t\tthis.context = AudioContext.getContext();\n\n\t\tthis.gain = this.context.createGain();\n\t\tthis.gain.connect( this.context.destination );\n\n\t\tthis.filter = null;\n\n\t\tthis.timeDelta = 0;\n\n\t\t// private\n\n\t\tthis._clock = new Clock();\n\n\t}\n\n\tgetInput() {\n\n\t\treturn this.gain;\n\n\t}\n\n\tremoveFilter() {\n\n\t\tif ( this.filter !== null ) {\n\n\t\t\tthis.gain.disconnect( this.filter );\n\t\t\tthis.filter.disconnect( this.context.destination );\n\t\t\tthis.gain.connect( this.context.destination );\n\t\t\tthis.filter = null;\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n\tgetFilter() {\n\n\t\treturn this.filter;\n\n\t}\n\n\tsetFilter( value ) {\n\n\t\tif ( this.filter !== null ) {\n\n\t\t\tthis.gain.disconnect( this.filter );\n\t\t\tthis.filter.disconnect( this.context.destination );\n\n\t\t} else {\n\n\t\t\tthis.gain.disconnect( this.context.destination );\n\n\t\t}\n\n\t\tthis.filter = value;\n\t\tthis.gain.connect( this.filter );\n\t\tthis.filter.connect( this.context.destination );\n\n\t\treturn this;\n\n\t}\n\n\tgetMasterVolume() {\n\n\t\treturn this.gain.gain.value;\n\n\t}\n\n\tsetMasterVolume( value ) {\n\n\t\tthis.gain.gain.setTargetAtTime( value, this.context.currentTime, 0.01 );\n\n\t\treturn this;\n\n\t}\n\n\tupdateMatrixWorld( force ) {\n\n\t\tsuper.updateMatrixWorld( force );\n\n\t\tconst listener = this.context.listener;\n\t\tconst up = this.up;\n\n\t\tthis.timeDelta = this._clock.getDelta();\n\n\t\tthis.matrixWorld.decompose( _position$2, _quaternion$3, _scale$1 );\n\n\t\t_orientation.set( 0, 0, - 1 ).applyQuaternion( _quaternion$3 );\n\n\t\tif ( listener.positionX ) {\n\n\t\t\t// code path for Chrome (see #14393)\n\n\t\t\tconst endTime = this.context.currentTime + this.timeDelta;\n\n\t\t\tlistener.positionX.linearRampToValueAtTime( _position$2.x, endTime );\n\t\t\tlistener.positionY.linearRampToValueAtTime( _position$2.y, endTime );\n\t\t\tlistener.positionZ.linearRampToValueAtTime( _position$2.z, endTime );\n\t\t\tlistener.forwardX.linearRampToValueAtTime( _orientation.x, endTime );\n\t\t\tlistener.forwardY.linearRampToValueAtTime( _orientation.y, endTime );\n\t\t\tlistener.forwardZ.linearRampToValueAtTime( _orientation.z, endTime );\n\t\t\tlistener.upX.linearRampToValueAtTime( up.x, endTime );\n\t\t\tlistener.upY.linearRampToValueAtTime( up.y, endTime );\n\t\t\tlistener.upZ.linearRampToValueAtTime( up.z, endTime );\n\n\t\t} else {\n\n\t\t\tlistener.setPosition( _position$2.x, _position$2.y, _position$2.z );\n\t\t\tlistener.setOrientation( _orientation.x, _orientation.y, _orientation.z, up.x, up.y, up.z );\n\n\t\t}\n\n\t}\n\n}\n\nclass Audio extends Object3D {\n\n\tconstructor( listener ) {\n\n\t\tsuper();\n\n\t\tthis.type = 'Audio';\n\n\t\tthis.listener = listener;\n\t\tthis.context = listener.context;\n\n\t\tthis.gain = this.context.createGain();\n\t\tthis.gain.connect( listener.getInput() );\n\n\t\tthis.autoplay = false;\n\n\t\tthis.buffer = null;\n\t\tthis.detune = 0;\n\t\tthis.loop = false;\n\t\tthis.loopStart = 0;\n\t\tthis.loopEnd = 0;\n\t\tthis.offset = 0;\n\t\tthis.duration = undefined;\n\t\tthis.playbackRate = 1;\n\t\tthis.isPlaying = false;\n\t\tthis.hasPlaybackControl = true;\n\t\tthis.source = null;\n\t\tthis.sourceType = 'empty';\n\n\t\tthis._startedAt = 0;\n\t\tthis._progress = 0;\n\t\tthis._connected = false;\n\n\t\tthis.filters = [];\n\n\t}\n\n\tgetOutput() {\n\n\t\treturn this.gain;\n\n\t}\n\n\tsetNodeSource( audioNode ) {\n\n\t\tthis.hasPlaybackControl = false;\n\t\tthis.sourceType = 'audioNode';\n\t\tthis.source = audioNode;\n\t\tthis.connect();\n\n\t\treturn this;\n\n\t}\n\n\tsetMediaElementSource( mediaElement ) {\n\n\t\tthis.hasPlaybackControl = false;\n\t\tthis.sourceType = 'mediaNode';\n\t\tthis.source = this.context.createMediaElementSource( mediaElement );\n\t\tthis.connect();\n\n\t\treturn this;\n\n\t}\n\n\tsetMediaStreamSource( mediaStream ) {\n\n\t\tthis.hasPlaybackControl = false;\n\t\tthis.sourceType = 'mediaStreamNode';\n\t\tthis.source = this.context.createMediaStreamSource( mediaStream );\n\t\tthis.connect();\n\n\t\treturn this;\n\n\t}\n\n\tsetBuffer( audioBuffer ) {\n\n\t\tthis.buffer = audioBuffer;\n\t\tthis.sourceType = 'buffer';\n\n\t\tif ( this.autoplay ) this.play();\n\n\t\treturn this;\n\n\t}\n\n\tplay( delay = 0 ) {\n\n\t\tif ( this.isPlaying === true ) {\n\n\t\t\tconsole.warn( 'THREE.Audio: Audio is already playing.' );\n\t\t\treturn;\n\n\t\t}\n\n\t\tif ( this.hasPlaybackControl === false ) {\n\n\t\t\tconsole.warn( 'THREE.Audio: this Audio has no playback control.' );\n\t\t\treturn;\n\n\t\t}\n\n\t\tthis._startedAt = this.context.currentTime + delay;\n\n\t\tconst source = this.context.createBufferSource();\n\t\tsource.buffer = this.buffer;\n\t\tsource.loop = this.loop;\n\t\tsource.loopStart = this.loopStart;\n\t\tsource.loopEnd = this.loopEnd;\n\t\tsource.onended = this.onEnded.bind( this );\n\t\tsource.start( this._startedAt, this._progress + this.offset, this.duration );\n\n\t\tthis.isPlaying = true;\n\n\t\tthis.source = source;\n\n\t\tthis.setDetune( this.detune );\n\t\tthis.setPlaybackRate( this.playbackRate );\n\n\t\treturn this.connect();\n\n\t}\n\n\tpause() {\n\n\t\tif ( this.hasPlaybackControl === false ) {\n\n\t\t\tconsole.warn( 'THREE.Audio: this Audio has no playback control.' );\n\t\t\treturn;\n\n\t\t}\n\n\t\tif ( this.isPlaying === true ) {\n\n\t\t\t// update current progress\n\n\t\t\tthis._progress += Math.max( this.context.currentTime - this._startedAt, 0 ) * this.playbackRate;\n\n\t\t\tif ( this.loop === true ) {\n\n\t\t\t\t// ensure _progress does not exceed duration with looped audios\n\n\t\t\t\tthis._progress = this._progress % ( this.duration || this.buffer.duration );\n\n\t\t\t}\n\n\t\t\tthis.source.stop();\n\t\t\tthis.source.onended = null;\n\n\t\t\tthis.isPlaying = false;\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n\tstop() {\n\n\t\tif ( this.hasPlaybackControl === false ) {\n\n\t\t\tconsole.warn( 'THREE.Audio: this Audio has no playback control.' );\n\t\t\treturn;\n\n\t\t}\n\n\t\tthis._progress = 0;\n\n\t\tthis.source.stop();\n\t\tthis.source.onended = null;\n\t\tthis.isPlaying = false;\n\n\t\treturn this;\n\n\t}\n\n\tconnect() {\n\n\t\tif ( this.filters.length > 0 ) {\n\n\t\t\tthis.source.connect( this.filters[ 0 ] );\n\n\t\t\tfor ( let i = 1, l = this.filters.length; i < l; i ++ ) {\n\n\t\t\t\tthis.filters[ i - 1 ].connect( this.filters[ i ] );\n\n\t\t\t}\n\n\t\t\tthis.filters[ this.filters.length - 1 ].connect( this.getOutput() );\n\n\t\t} else {\n\n\t\t\tthis.source.connect( this.getOutput() );\n\n\t\t}\n\n\t\tthis._connected = true;\n\n\t\treturn this;\n\n\t}\n\n\tdisconnect() {\n\n\t\tif ( this.filters.length > 0 ) {\n\n\t\t\tthis.source.disconnect( this.filters[ 0 ] );\n\n\t\t\tfor ( let i = 1, l = this.filters.length; i < l; i ++ ) {\n\n\t\t\t\tthis.filters[ i - 1 ].disconnect( this.filters[ i ] );\n\n\t\t\t}\n\n\t\t\tthis.filters[ this.filters.length - 1 ].disconnect( this.getOutput() );\n\n\t\t} else {\n\n\t\t\tthis.source.disconnect( this.getOutput() );\n\n\t\t}\n\n\t\tthis._connected = false;\n\n\t\treturn this;\n\n\t}\n\n\tgetFilters() {\n\n\t\treturn this.filters;\n\n\t}\n\n\tsetFilters( value ) {\n\n\t\tif ( ! value ) value = [];\n\n\t\tif ( this._connected === true ) {\n\n\t\t\tthis.disconnect();\n\t\t\tthis.filters = value.slice();\n\t\t\tthis.connect();\n\n\t\t} else {\n\n\t\t\tthis.filters = value.slice();\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n\tsetDetune( value ) {\n\n\t\tthis.detune = value;\n\n\t\tif ( this.source.detune === undefined ) return; // only set detune when available\n\n\t\tif ( this.isPlaying === true ) {\n\n\t\t\tthis.source.detune.setTargetAtTime( this.detune, this.context.currentTime, 0.01 );\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n\tgetDetune() {\n\n\t\treturn this.detune;\n\n\t}\n\n\tgetFilter() {\n\n\t\treturn this.getFilters()[ 0 ];\n\n\t}\n\n\tsetFilter( filter ) {\n\n\t\treturn this.setFilters( filter ? [ filter ] : [] );\n\n\t}\n\n\tsetPlaybackRate( value ) {\n\n\t\tif ( this.hasPlaybackControl === false ) {\n\n\t\t\tconsole.warn( 'THREE.Audio: this Audio has no playback control.' );\n\t\t\treturn;\n\n\t\t}\n\n\t\tthis.playbackRate = value;\n\n\t\tif ( this.isPlaying === true ) {\n\n\t\t\tthis.source.playbackRate.setTargetAtTime( this.playbackRate, this.context.currentTime, 0.01 );\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n\tgetPlaybackRate() {\n\n\t\treturn this.playbackRate;\n\n\t}\n\n\tonEnded() {\n\n\t\tthis.isPlaying = false;\n\n\t}\n\n\tgetLoop() {\n\n\t\tif ( this.hasPlaybackControl === false ) {\n\n\t\t\tconsole.warn( 'THREE.Audio: this Audio has no playback control.' );\n\t\t\treturn false;\n\n\t\t}\n\n\t\treturn this.loop;\n\n\t}\n\n\tsetLoop( value ) {\n\n\t\tif ( this.hasPlaybackControl === false ) {\n\n\t\t\tconsole.warn( 'THREE.Audio: this Audio has no playback control.' );\n\t\t\treturn;\n\n\t\t}\n\n\t\tthis.loop = value;\n\n\t\tif ( this.isPlaying === true ) {\n\n\t\t\tthis.source.loop = this.loop;\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n\tsetLoopStart( value ) {\n\n\t\tthis.loopStart = value;\n\n\t\treturn this;\n\n\t}\n\n\tsetLoopEnd( value ) {\n\n\t\tthis.loopEnd = value;\n\n\t\treturn this;\n\n\t}\n\n\tgetVolume() {\n\n\t\treturn this.gain.gain.value;\n\n\t}\n\n\tsetVolume( value ) {\n\n\t\tthis.gain.gain.setTargetAtTime( value, this.context.currentTime, 0.01 );\n\n\t\treturn this;\n\n\t}\n\n}\n\nconst _position$3 = /*@__PURE__*/ new Vector3();\nconst _quaternion$4 = /*@__PURE__*/ new Quaternion();\nconst _scale$2 = /*@__PURE__*/ new Vector3();\nconst _orientation$1 = /*@__PURE__*/ new Vector3();\n\nclass PositionalAudio extends Audio {\n\n\tconstructor( listener ) {\n\n\t\tsuper( listener );\n\n\t\tthis.panner = this.context.createPanner();\n\t\tthis.panner.panningModel = 'HRTF';\n\t\tthis.panner.connect( this.gain );\n\n\t}\n\n\tgetOutput() {\n\n\t\treturn this.panner;\n\n\t}\n\n\tgetRefDistance() {\n\n\t\treturn this.panner.refDistance;\n\n\t}\n\n\tsetRefDistance( value ) {\n\n\t\tthis.panner.refDistance = value;\n\n\t\treturn this;\n\n\t}\n\n\tgetRolloffFactor() {\n\n\t\treturn this.panner.rolloffFactor;\n\n\t}\n\n\tsetRolloffFactor( value ) {\n\n\t\tthis.panner.rolloffFactor = value;\n\n\t\treturn this;\n\n\t}\n\n\tgetDistanceModel() {\n\n\t\treturn this.panner.distanceModel;\n\n\t}\n\n\tsetDistanceModel( value ) {\n\n\t\tthis.panner.distanceModel = value;\n\n\t\treturn this;\n\n\t}\n\n\tgetMaxDistance() {\n\n\t\treturn this.panner.maxDistance;\n\n\t}\n\n\tsetMaxDistance( value ) {\n\n\t\tthis.panner.maxDistance = value;\n\n\t\treturn this;\n\n\t}\n\n\tsetDirectionalCone( coneInnerAngle, coneOuterAngle, coneOuterGain ) {\n\n\t\tthis.panner.coneInnerAngle = coneInnerAngle;\n\t\tthis.panner.coneOuterAngle = coneOuterAngle;\n\t\tthis.panner.coneOuterGain = coneOuterGain;\n\n\t\treturn this;\n\n\t}\n\n\tupdateMatrixWorld( force ) {\n\n\t\tsuper.updateMatrixWorld( force );\n\n\t\tif ( this.hasPlaybackControl === true && this.isPlaying === false ) return;\n\n\t\tthis.matrixWorld.decompose( _position$3, _quaternion$4, _scale$2 );\n\n\t\t_orientation$1.set( 0, 0, 1 ).applyQuaternion( _quaternion$4 );\n\n\t\tconst panner = this.panner;\n\n\t\tif ( panner.positionX ) {\n\n\t\t\t// code path for Chrome and Firefox (see #14393)\n\n\t\t\tconst endTime = this.context.currentTime + this.listener.timeDelta;\n\n\t\t\tpanner.positionX.linearRampToValueAtTime( _position$3.x, endTime );\n\t\t\tpanner.positionY.linearRampToValueAtTime( _position$3.y, endTime );\n\t\t\tpanner.positionZ.linearRampToValueAtTime( _position$3.z, endTime );\n\t\t\tpanner.orientationX.linearRampToValueAtTime( _orientation$1.x, endTime );\n\t\t\tpanner.orientationY.linearRampToValueAtTime( _orientation$1.y, endTime );\n\t\t\tpanner.orientationZ.linearRampToValueAtTime( _orientation$1.z, endTime );\n\n\t\t} else {\n\n\t\t\tpanner.setPosition( _position$3.x, _position$3.y, _position$3.z );\n\t\t\tpanner.setOrientation( _orientation$1.x, _orientation$1.y, _orientation$1.z );\n\n\t\t}\n\n\t}\n\n}\n\nclass AudioAnalyser {\n\n\tconstructor( audio, fftSize = 2048 ) {\n\n\t\tthis.analyser = audio.context.createAnalyser();\n\t\tthis.analyser.fftSize = fftSize;\n\n\t\tthis.data = new Uint8Array( this.analyser.frequencyBinCount );\n\n\t\taudio.getOutput().connect( this.analyser );\n\n\t}\n\n\n\tgetFrequencyData() {\n\n\t\tthis.analyser.getByteFrequencyData( this.data );\n\n\t\treturn this.data;\n\n\t}\n\n\tgetAverageFrequency() {\n\n\t\tlet value = 0;\n\t\tconst data = this.getFrequencyData();\n\n\t\tfor ( let i = 0; i < data.length; i ++ ) {\n\n\t\t\tvalue += data[ i ];\n\n\t\t}\n\n\t\treturn value / data.length;\n\n\t}\n\n}\n\nfunction PropertyMixer( binding, typeName, valueSize ) {\n\n\tthis.binding = binding;\n\tthis.valueSize = valueSize;\n\n\tlet mixFunction,\n\t\tmixFunctionAdditive,\n\t\tsetIdentity;\n\n\t// buffer layout: [ incoming | accu0 | accu1 | orig | addAccu | (optional work) ]\n\t//\n\t// interpolators can use .buffer as their .result\n\t// the data then goes to 'incoming'\n\t//\n\t// 'accu0' and 'accu1' are used frame-interleaved for\n\t// the cumulative result and are compared to detect\n\t// changes\n\t//\n\t// 'orig' stores the original state of the property\n\t//\n\t// 'add' is used for additive cumulative results\n\t//\n\t// 'work' is optional and is only present for quaternion types. It is used\n\t// to store intermediate quaternion multiplication results\n\n\tswitch ( typeName ) {\n\n\t\tcase 'quaternion':\n\t\t\tmixFunction = this._slerp;\n\t\t\tmixFunctionAdditive = this._slerpAdditive;\n\t\t\tsetIdentity = this._setAdditiveIdentityQuaternion;\n\n\t\t\tthis.buffer = new Float64Array( valueSize * 6 );\n\t\t\tthis._workIndex = 5;\n\t\t\tbreak;\n\n\t\tcase 'string':\n\t\tcase 'bool':\n\t\t\tmixFunction = this._select;\n\n\t\t\t// Use the regular mix function and for additive on these types,\n\t\t\t// additive is not relevant for non-numeric types\n\t\t\tmixFunctionAdditive = this._select;\n\n\t\t\tsetIdentity = this._setAdditiveIdentityOther;\n\n\t\t\tthis.buffer = new Array( valueSize * 5 );\n\t\t\tbreak;\n\n\t\tdefault:\n\t\t\tmixFunction = this._lerp;\n\t\t\tmixFunctionAdditive = this._lerpAdditive;\n\t\t\tsetIdentity = this._setAdditiveIdentityNumeric;\n\n\t\t\tthis.buffer = new Float64Array( valueSize * 5 );\n\n\t}\n\n\tthis._mixBufferRegion = mixFunction;\n\tthis._mixBufferRegionAdditive = mixFunctionAdditive;\n\tthis._setIdentity = setIdentity;\n\tthis._origIndex = 3;\n\tthis._addIndex = 4;\n\n\tthis.cumulativeWeight = 0;\n\tthis.cumulativeWeightAdditive = 0;\n\n\tthis.useCount = 0;\n\tthis.referenceCount = 0;\n\n}\n\nObject.assign( PropertyMixer.prototype, {\n\n\t// accumulate data in the 'incoming' region into 'accu<i>'\n\taccumulate: function ( accuIndex, weight ) {\n\n\t\t// note: happily accumulating nothing when weight = 0, the caller knows\n\t\t// the weight and shouldn't have made the call in the first place\n\n\t\tconst buffer = this.buffer,\n\t\t\tstride = this.valueSize,\n\t\t\toffset = accuIndex * stride + stride;\n\n\t\tlet currentWeight = this.cumulativeWeight;\n\n\t\tif ( currentWeight === 0 ) {\n\n\t\t\t// accuN := incoming * weight\n\n\t\t\tfor ( let i = 0; i !== stride; ++ i ) {\n\n\t\t\t\tbuffer[ offset + i ] = buffer[ i ];\n\n\t\t\t}\n\n\t\t\tcurrentWeight = weight;\n\n\t\t} else {\n\n\t\t\t// accuN := accuN + incoming * weight\n\n\t\t\tcurrentWeight += weight;\n\t\t\tconst mix = weight / currentWeight;\n\t\t\tthis._mixBufferRegion( buffer, offset, 0, mix, stride );\n\n\t\t}\n\n\t\tthis.cumulativeWeight = currentWeight;\n\n\t},\n\n\t// accumulate data in the 'incoming' region into 'add'\n\taccumulateAdditive: function ( weight ) {\n\n\t\tconst buffer = this.buffer,\n\t\t\tstride = this.valueSize,\n\t\t\toffset = stride * this._addIndex;\n\n\t\tif ( this.cumulativeWeightAdditive === 0 ) {\n\n\t\t\t// add = identity\n\n\t\t\tthis._setIdentity();\n\n\t\t}\n\n\t\t// add := add + incoming * weight\n\n\t\tthis._mixBufferRegionAdditive( buffer, offset, 0, weight, stride );\n\t\tthis.cumulativeWeightAdditive += weight;\n\n\t},\n\n\t// apply the state of 'accu<i>' to the binding when accus differ\n\tapply: function ( accuIndex ) {\n\n\t\tconst stride = this.valueSize,\n\t\t\tbuffer = this.buffer,\n\t\t\toffset = accuIndex * stride + stride,\n\n\t\t\tweight = this.cumulativeWeight,\n\t\t\tweightAdditive = this.cumulativeWeightAdditive,\n\n\t\t\tbinding = this.binding;\n\n\t\tthis.cumulativeWeight = 0;\n\t\tthis.cumulativeWeightAdditive = 0;\n\n\t\tif ( weight < 1 ) {\n\n\t\t\t// accuN := accuN + original * ( 1 - cumulativeWeight )\n\n\t\t\tconst originalValueOffset = stride * this._origIndex;\n\n\t\t\tthis._mixBufferRegion(\n\t\t\t\tbuffer, offset, originalValueOffset, 1 - weight, stride );\n\n\t\t}\n\n\t\tif ( weightAdditive > 0 ) {\n\n\t\t\t// accuN := accuN + additive accuN\n\n\t\t\tthis._mixBufferRegionAdditive( buffer, offset, this._addIndex * stride, 1, stride );\n\n\t\t}\n\n\t\tfor ( let i = stride, e = stride + stride; i !== e; ++ i ) {\n\n\t\t\tif ( buffer[ i ] !== buffer[ i + stride ] ) {\n\n\t\t\t\t// value has changed -> update scene graph\n\n\t\t\t\tbinding.setValue( buffer, offset );\n\t\t\t\tbreak;\n\n\t\t\t}\n\n\t\t}\n\n\t},\n\n\t// remember the state of the bound property and copy it to both accus\n\tsaveOriginalState: function () {\n\n\t\tconst binding = this.binding;\n\n\t\tconst buffer = this.buffer,\n\t\t\tstride = this.valueSize,\n\n\t\t\toriginalValueOffset = stride * this._origIndex;\n\n\t\tbinding.getValue( buffer, originalValueOffset );\n\n\t\t// accu[0..1] := orig -- initially detect changes against the original\n\t\tfor ( let i = stride, e = originalValueOffset; i !== e; ++ i ) {\n\n\t\t\tbuffer[ i ] = buffer[ originalValueOffset + ( i % stride ) ];\n\n\t\t}\n\n\t\t// Add to identity for additive\n\t\tthis._setIdentity();\n\n\t\tthis.cumulativeWeight = 0;\n\t\tthis.cumulativeWeightAdditive = 0;\n\n\t},\n\n\t// apply the state previously taken via 'saveOriginalState' to the binding\n\trestoreOriginalState: function () {\n\n\t\tconst originalValueOffset = this.valueSize * 3;\n\t\tthis.binding.setValue( this.buffer, originalValueOffset );\n\n\t},\n\n\t_setAdditiveIdentityNumeric: function () {\n\n\t\tconst startIndex = this._addIndex * this.valueSize;\n\t\tconst endIndex = startIndex + this.valueSize;\n\n\t\tfor ( let i = startIndex; i < endIndex; i ++ ) {\n\n\t\t\tthis.buffer[ i ] = 0;\n\n\t\t}\n\n\t},\n\n\t_setAdditiveIdentityQuaternion: function () {\n\n\t\tthis._setAdditiveIdentityNumeric();\n\t\tthis.buffer[ this._addIndex * this.valueSize + 3 ] = 1;\n\n\t},\n\n\t_setAdditiveIdentityOther: function () {\n\n\t\tconst startIndex = this._origIndex * this.valueSize;\n\t\tconst targetIndex = this._addIndex * this.valueSize;\n\n\t\tfor ( let i = 0; i < this.valueSize; i ++ ) {\n\n\t\t\tthis.buffer[ targetIndex + i ] = this.buffer[ startIndex + i ];\n\n\t\t}\n\n\t},\n\n\n\t// mix functions\n\n\t_select: function ( buffer, dstOffset, srcOffset, t, stride ) {\n\n\t\tif ( t >= 0.5 ) {\n\n\t\t\tfor ( let i = 0; i !== stride; ++ i ) {\n\n\t\t\t\tbuffer[ dstOffset + i ] = buffer[ srcOffset + i ];\n\n\t\t\t}\n\n\t\t}\n\n\t},\n\n\t_slerp: function ( buffer, dstOffset, srcOffset, t ) {\n\n\t\tQuaternion.slerpFlat( buffer, dstOffset, buffer, dstOffset, buffer, srcOffset, t );\n\n\t},\n\n\t_slerpAdditive: function ( buffer, dstOffset, srcOffset, t, stride ) {\n\n\t\tconst workOffset = this._workIndex * stride;\n\n\t\t// Store result in intermediate buffer offset\n\t\tQuaternion.multiplyQuaternionsFlat( buffer, workOffset, buffer, dstOffset, buffer, srcOffset );\n\n\t\t// Slerp to the intermediate result\n\t\tQuaternion.slerpFlat( buffer, dstOffset, buffer, dstOffset, buffer, workOffset, t );\n\n\t},\n\n\t_lerp: function ( buffer, dstOffset, srcOffset, t, stride ) {\n\n\t\tconst s = 1 - t;\n\n\t\tfor ( let i = 0; i !== stride; ++ i ) {\n\n\t\t\tconst j = dstOffset + i;\n\n\t\t\tbuffer[ j ] = buffer[ j ] * s + buffer[ srcOffset + i ] * t;\n\n\t\t}\n\n\t},\n\n\t_lerpAdditive: function ( buffer, dstOffset, srcOffset, t, stride ) {\n\n\t\tfor ( let i = 0; i !== stride; ++ i ) {\n\n\t\t\tconst j = dstOffset + i;\n\n\t\t\tbuffer[ j ] = buffer[ j ] + buffer[ srcOffset + i ] * t;\n\n\t\t}\n\n\t}\n\n} );\n\n// Characters [].:/ are reserved for track binding syntax.\nconst _RESERVED_CHARS_RE = '\\\\[\\\\]\\\\.:\\\\/';\nconst _reservedRe = new RegExp( '[' + _RESERVED_CHARS_RE + ']', 'g' );\n\n// Attempts to allow node names from any language. ES5's `\\w` regexp matches\n// only latin characters, and the unicode \\p{L} is not yet supported. So\n// instead, we exclude reserved characters and match everything else.\nconst _wordChar = '[^' + _RESERVED_CHARS_RE + ']';\nconst _wordCharOrDot = '[^' + _RESERVED_CHARS_RE.replace( '\\\\.', '' ) + ']';\n\n// Parent directories, delimited by '/' or ':'. Currently unused, but must\n// be matched to parse the rest of the track name.\nconst _directoryRe = /((?:WC+[\\/:])*)/.source.replace( 'WC', _wordChar );\n\n// Target node. May contain word characters (a-zA-Z0-9_) and '.' or '-'.\nconst _nodeRe = /(WCOD+)?/.source.replace( 'WCOD', _wordCharOrDot );\n\n// Object on target node, and accessor. May not contain reserved\n// characters. Accessor may contain any character except closing bracket.\nconst _objectRe = /(?:\\.(WC+)(?:\\[(.+)\\])?)?/.source.replace( 'WC', _wordChar );\n\n// Property and accessor. May not contain reserved characters. Accessor may\n// contain any non-bracket characters.\nconst _propertyRe = /\\.(WC+)(?:\\[(.+)\\])?/.source.replace( 'WC', _wordChar );\n\nconst _trackRe = new RegExp( ''\n\t+ '^'\n\t+ _directoryRe\n\t+ _nodeRe\n\t+ _objectRe\n\t+ _propertyRe\n\t+ '$'\n);\n\nconst _supportedObjectNames = [ 'material', 'materials', 'bones' ];\n\nfunction Composite( targetGroup, path, optionalParsedPath ) {\n\n\tconst parsedPath = optionalParsedPath || PropertyBinding.parseTrackName( path );\n\n\tthis._targetGroup = targetGroup;\n\tthis._bindings = targetGroup.subscribe_( path, parsedPath );\n\n}\n\nObject.assign( Composite.prototype, {\n\n\tgetValue: function ( array, offset ) {\n\n\t\tthis.bind(); // bind all binding\n\n\t\tconst firstValidIndex = this._targetGroup.nCachedObjects_,\n\t\t\tbinding = this._bindings[ firstValidIndex ];\n\n\t\t// and only call .getValue on the first\n\t\tif ( binding !== undefined ) binding.getValue( array, offset );\n\n\t},\n\n\tsetValue: function ( array, offset ) {\n\n\t\tconst bindings = this._bindings;\n\n\t\tfor ( let i = this._targetGroup.nCachedObjects_, n = bindings.length; i !== n; ++ i ) {\n\n\t\t\tbindings[ i ].setValue( array, offset );\n\n\t\t}\n\n\t},\n\n\tbind: function () {\n\n\t\tconst bindings = this._bindings;\n\n\t\tfor ( let i = this._targetGroup.nCachedObjects_, n = bindings.length; i !== n; ++ i ) {\n\n\t\t\tbindings[ i ].bind();\n\n\t\t}\n\n\t},\n\n\tunbind: function () {\n\n\t\tconst bindings = this._bindings;\n\n\t\tfor ( let i = this._targetGroup.nCachedObjects_, n = bindings.length; i !== n; ++ i ) {\n\n\t\t\tbindings[ i ].unbind();\n\n\t\t}\n\n\t}\n\n} );\n\n\nfunction PropertyBinding( rootNode, path, parsedPath ) {\n\n\tthis.path = path;\n\tthis.parsedPath = parsedPath || PropertyBinding.parseTrackName( path );\n\n\tthis.node = PropertyBinding.findNode( rootNode, this.parsedPath.nodeName ) || rootNode;\n\n\tthis.rootNode = rootNode;\n\n}\n\nObject.assign( PropertyBinding, {\n\n\tComposite: Composite,\n\n\tcreate: function ( root, path, parsedPath ) {\n\n\t\tif ( ! ( root && root.isAnimationObjectGroup ) ) {\n\n\t\t\treturn new PropertyBinding( root, path, parsedPath );\n\n\t\t} else {\n\n\t\t\treturn new PropertyBinding.Composite( root, path, parsedPath );\n\n\t\t}\n\n\t},\n\n\t/**\n\t * Replaces spaces with underscores and removes unsupported characters from\n\t * node names, to ensure compatibility with parseTrackName().\n\t *\n\t * @param {string} name Node name to be sanitized.\n\t * @return {string}\n\t */\n\tsanitizeNodeName: function ( name ) {\n\n\t\treturn name.replace( /\\s/g, '_' ).replace( _reservedRe, '' );\n\n\t},\n\n\tparseTrackName: function ( trackName ) {\n\n\t\tconst matches = _trackRe.exec( trackName );\n\n\t\tif ( ! matches ) {\n\n\t\t\tthrow new Error( 'PropertyBinding: Cannot parse trackName: ' + trackName );\n\n\t\t}\n\n\t\tconst results = {\n\t\t\t// directoryName: matches[ 1 ], // (tschw) currently unused\n\t\t\tnodeName: matches[ 2 ],\n\t\t\tobjectName: matches[ 3 ],\n\t\t\tobjectIndex: matches[ 4 ],\n\t\t\tpropertyName: matches[ 5 ], // required\n\t\t\tpropertyIndex: matches[ 6 ]\n\t\t};\n\n\t\tconst lastDot = results.nodeName && results.nodeName.lastIndexOf( '.' );\n\n\t\tif ( lastDot !== undefined && lastDot !== - 1 ) {\n\n\t\t\tconst objectName = results.nodeName.substring( lastDot + 1 );\n\n\t\t\t// Object names must be checked against an allowlist. Otherwise, there\n\t\t\t// is no way to parse 'foo.bar.baz': 'baz' must be a property, but\n\t\t\t// 'bar' could be the objectName, or part of a nodeName (which can\n\t\t\t// include '.' characters).\n\t\t\tif ( _supportedObjectNames.indexOf( objectName ) !== - 1 ) {\n\n\t\t\t\tresults.nodeName = results.nodeName.substring( 0, lastDot );\n\t\t\t\tresults.objectName = objectName;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( results.propertyName === null || results.propertyName.length === 0 ) {\n\n\t\t\tthrow new Error( 'PropertyBinding: can not parse propertyName from trackName: ' + trackName );\n\n\t\t}\n\n\t\treturn results;\n\n\t},\n\n\tfindNode: function ( root, nodeName ) {\n\n\t\tif ( ! nodeName || nodeName === '' || nodeName === '.' || nodeName === - 1 || nodeName === root.name || nodeName === root.uuid ) {\n\n\t\t\treturn root;\n\n\t\t}\n\n\t\t// search into skeleton bones.\n\t\tif ( root.skeleton ) {\n\n\t\t\tconst bone = root.skeleton.getBoneByName( nodeName );\n\n\t\t\tif ( bone !== undefined ) {\n\n\t\t\t\treturn bone;\n\n\t\t\t}\n\n\t\t}\n\n\t\t// search into node subtree.\n\t\tif ( root.children ) {\n\n\t\t\tconst searchNodeSubtree = function ( children ) {\n\n\t\t\t\tfor ( let i = 0; i < children.length; i ++ ) {\n\n\t\t\t\t\tconst childNode = children[ i ];\n\n\t\t\t\t\tif ( childNode.name === nodeName || childNode.uuid === nodeName ) {\n\n\t\t\t\t\t\treturn childNode;\n\n\t\t\t\t\t}\n\n\t\t\t\t\tconst result = searchNodeSubtree( childNode.children );\n\n\t\t\t\t\tif ( result ) return result;\n\n\t\t\t\t}\n\n\t\t\t\treturn null;\n\n\t\t\t};\n\n\t\t\tconst subTreeNode = searchNodeSubtree( root.children );\n\n\t\t\tif ( subTreeNode ) {\n\n\t\t\t\treturn subTreeNode;\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn null;\n\n\t}\n\n} );\n\nObject.assign( PropertyBinding.prototype, { // prototype, continued\n\n\t// these are used to \"bind\" a nonexistent property\n\t_getValue_unavailable: function () {},\n\t_setValue_unavailable: function () {},\n\n\tBindingType: {\n\t\tDirect: 0,\n\t\tEntireArray: 1,\n\t\tArrayElement: 2,\n\t\tHasFromToArray: 3\n\t},\n\n\tVersioning: {\n\t\tNone: 0,\n\t\tNeedsUpdate: 1,\n\t\tMatrixWorldNeedsUpdate: 2\n\t},\n\n\tGetterByBindingType: [\n\n\t\tfunction getValue_direct( buffer, offset ) {\n\n\t\t\tbuffer[ offset ] = this.node[ this.propertyName ];\n\n\t\t},\n\n\t\tfunction getValue_array( buffer, offset ) {\n\n\t\t\tconst source = this.resolvedProperty;\n\n\t\t\tfor ( let i = 0, n = source.length; i !== n; ++ i ) {\n\n\t\t\t\tbuffer[ offset ++ ] = source[ i ];\n\n\t\t\t}\n\n\t\t},\n\n\t\tfunction getValue_arrayElement( buffer, offset ) {\n\n\t\t\tbuffer[ offset ] = this.resolvedProperty[ this.propertyIndex ];\n\n\t\t},\n\n\t\tfunction getValue_toArray( buffer, offset ) {\n\n\t\t\tthis.resolvedProperty.toArray( buffer, offset );\n\n\t\t}\n\n\t],\n\n\tSetterByBindingTypeAndVersioning: [\n\n\t\t[\n\t\t\t// Direct\n\n\t\t\tfunction setValue_direct( buffer, offset ) {\n\n\t\t\t\tthis.targetObject[ this.propertyName ] = buffer[ offset ];\n\n\t\t\t},\n\n\t\t\tfunction setValue_direct_setNeedsUpdate( buffer, offset ) {\n\n\t\t\t\tthis.targetObject[ this.propertyName ] = buffer[ offset ];\n\t\t\t\tthis.targetObject.needsUpdate = true;\n\n\t\t\t},\n\n\t\t\tfunction setValue_direct_setMatrixWorldNeedsUpdate( buffer, offset ) {\n\n\t\t\t\tthis.targetObject[ this.propertyName ] = buffer[ offset ];\n\t\t\t\tthis.targetObject.matrixWorldNeedsUpdate = true;\n\n\t\t\t}\n\n\t\t], [\n\n\t\t\t// EntireArray\n\n\t\t\tfunction setValue_array( buffer, offset ) {\n\n\t\t\t\tconst dest = this.resolvedProperty;\n\n\t\t\t\tfor ( let i = 0, n = dest.length; i !== n; ++ i ) {\n\n\t\t\t\t\tdest[ i ] = buffer[ offset ++ ];\n\n\t\t\t\t}\n\n\t\t\t},\n\n\t\t\tfunction setValue_array_setNeedsUpdate( buffer, offset ) {\n\n\t\t\t\tconst dest = this.resolvedProperty;\n\n\t\t\t\tfor ( let i = 0, n = dest.length; i !== n; ++ i ) {\n\n\t\t\t\t\tdest[ i ] = buffer[ offset ++ ];\n\n\t\t\t\t}\n\n\t\t\t\tthis.targetObject.needsUpdate = true;\n\n\t\t\t},\n\n\t\t\tfunction setValue_array_setMatrixWorldNeedsUpdate( buffer, offset ) {\n\n\t\t\t\tconst dest = this.resolvedProperty;\n\n\t\t\t\tfor ( let i = 0, n = dest.length; i !== n; ++ i ) {\n\n\t\t\t\t\tdest[ i ] = buffer[ offset ++ ];\n\n\t\t\t\t}\n\n\t\t\t\tthis.targetObject.matrixWorldNeedsUpdate = true;\n\n\t\t\t}\n\n\t\t], [\n\n\t\t\t// ArrayElement\n\n\t\t\tfunction setValue_arrayElement( buffer, offset ) {\n\n\t\t\t\tthis.resolvedProperty[ this.propertyIndex ] = buffer[ offset ];\n\n\t\t\t},\n\n\t\t\tfunction setValue_arrayElement_setNeedsUpdate( buffer, offset ) {\n\n\t\t\t\tthis.resolvedProperty[ this.propertyIndex ] = buffer[ offset ];\n\t\t\t\tthis.targetObject.needsUpdate = true;\n\n\t\t\t},\n\n\t\t\tfunction setValue_arrayElement_setMatrixWorldNeedsUpdate( buffer, offset ) {\n\n\t\t\t\tthis.resolvedProperty[ this.propertyIndex ] = buffer[ offset ];\n\t\t\t\tthis.targetObject.matrixWorldNeedsUpdate = true;\n\n\t\t\t}\n\n\t\t], [\n\n\t\t\t// HasToFromArray\n\n\t\t\tfunction setValue_fromArray( buffer, offset ) {\n\n\t\t\t\tthis.resolvedProperty.fromArray( buffer, offset );\n\n\t\t\t},\n\n\t\t\tfunction setValue_fromArray_setNeedsUpdate( buffer, offset ) {\n\n\t\t\t\tthis.resolvedProperty.fromArray( buffer, offset );\n\t\t\t\tthis.targetObject.needsUpdate = true;\n\n\t\t\t},\n\n\t\t\tfunction setValue_fromArray_setMatrixWorldNeedsUpdate( buffer, offset ) {\n\n\t\t\t\tthis.resolvedProperty.fromArray( buffer, offset );\n\t\t\t\tthis.targetObject.matrixWorldNeedsUpdate = true;\n\n\t\t\t}\n\n\t\t]\n\n\t],\n\n\tgetValue: function getValue_unbound( targetArray, offset ) {\n\n\t\tthis.bind();\n\t\tthis.getValue( targetArray, offset );\n\n\t\t// Note: This class uses a State pattern on a per-method basis:\n\t\t// 'bind' sets 'this.getValue' / 'setValue' and shadows the\n\t\t// prototype version of these methods with one that represents\n\t\t// the bound state. When the property is not found, the methods\n\t\t// become no-ops.\n\n\t},\n\n\tsetValue: function getValue_unbound( sourceArray, offset ) {\n\n\t\tthis.bind();\n\t\tthis.setValue( sourceArray, offset );\n\n\t},\n\n\t// create getter / setter pair for a property in the scene graph\n\tbind: function () {\n\n\t\tlet targetObject = this.node;\n\t\tconst parsedPath = this.parsedPath;\n\n\t\tconst objectName = parsedPath.objectName;\n\t\tconst propertyName = parsedPath.propertyName;\n\t\tlet propertyIndex = parsedPath.propertyIndex;\n\n\t\tif ( ! targetObject ) {\n\n\t\t\ttargetObject = PropertyBinding.findNode( this.rootNode, parsedPath.nodeName ) || this.rootNode;\n\n\t\t\tthis.node = targetObject;\n\n\t\t}\n\n\t\t// set fail state so we can just 'return' on error\n\t\tthis.getValue = this._getValue_unavailable;\n\t\tthis.setValue = this._setValue_unavailable;\n\n\t\t// ensure there is a value node\n\t\tif ( ! targetObject ) {\n\n\t\t\tconsole.error( 'THREE.PropertyBinding: Trying to update node for track: ' + this.path + ' but it wasn\\'t found.' );\n\t\t\treturn;\n\n\t\t}\n\n\t\tif ( objectName ) {\n\n\t\t\tlet objectIndex = parsedPath.objectIndex;\n\n\t\t\t// special cases were we need to reach deeper into the hierarchy to get the face materials....\n\t\t\tswitch ( objectName ) {\n\n\t\t\t\tcase 'materials':\n\n\t\t\t\t\tif ( ! targetObject.material ) {\n\n\t\t\t\t\t\tconsole.error( 'THREE.PropertyBinding: Can not bind to material as node does not have a material.', this );\n\t\t\t\t\t\treturn;\n\n\t\t\t\t\t}\n\n\t\t\t\t\tif ( ! targetObject.material.materials ) {\n\n\t\t\t\t\t\tconsole.error( 'THREE.PropertyBinding: Can not bind to material.materials as node.material does not have a materials array.', this );\n\t\t\t\t\t\treturn;\n\n\t\t\t\t\t}\n\n\t\t\t\t\ttargetObject = targetObject.material.materials;\n\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase 'bones':\n\n\t\t\t\t\tif ( ! targetObject.skeleton ) {\n\n\t\t\t\t\t\tconsole.error( 'THREE.PropertyBinding: Can not bind to bones as node does not have a skeleton.', this );\n\t\t\t\t\t\treturn;\n\n\t\t\t\t\t}\n\n\t\t\t\t\t// potential future optimization: skip this if propertyIndex is already an integer\n\t\t\t\t\t// and convert the integer string to a true integer.\n\n\t\t\t\t\ttargetObject = targetObject.skeleton.bones;\n\n\t\t\t\t\t// support resolving morphTarget names into indices.\n\t\t\t\t\tfor ( let i = 0; i < targetObject.length; i ++ ) {\n\n\t\t\t\t\t\tif ( targetObject[ i ].name === objectIndex ) {\n\n\t\t\t\t\t\t\tobjectIndex = i;\n\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t\tbreak;\n\n\t\t\t\tdefault:\n\n\t\t\t\t\tif ( targetObject[ objectName ] === undefined ) {\n\n\t\t\t\t\t\tconsole.error( 'THREE.PropertyBinding: Can not bind to objectName of node undefined.', this );\n\t\t\t\t\t\treturn;\n\n\t\t\t\t\t}\n\n\t\t\t\t\ttargetObject = targetObject[ objectName ];\n\n\t\t\t}\n\n\n\t\t\tif ( objectIndex !== undefined ) {\n\n\t\t\t\tif ( targetObject[ objectIndex ] === undefined ) {\n\n\t\t\t\t\tconsole.error( 'THREE.PropertyBinding: Trying to bind to objectIndex of objectName, but is undefined.', this, targetObject );\n\t\t\t\t\treturn;\n\n\t\t\t\t}\n\n\t\t\t\ttargetObject = targetObject[ objectIndex ];\n\n\t\t\t}\n\n\t\t}\n\n\t\t// resolve property\n\t\tconst nodeProperty = targetObject[ propertyName ];\n\n\t\tif ( nodeProperty === undefined ) {\n\n\t\t\tconst nodeName = parsedPath.nodeName;\n\n\t\t\tconsole.error( 'THREE.PropertyBinding: Trying to update property for track: ' + nodeName +\n\t\t\t\t'.' + propertyName + ' but it wasn\\'t found.', targetObject );\n\t\t\treturn;\n\n\t\t}\n\n\t\t// determine versioning scheme\n\t\tlet versioning = this.Versioning.None;\n\n\t\tthis.targetObject = targetObject;\n\n\t\tif ( targetObject.needsUpdate !== undefined ) { // material\n\n\t\t\tversioning = this.Versioning.NeedsUpdate;\n\n\t\t} else if ( targetObject.matrixWorldNeedsUpdate !== undefined ) { // node transform\n\n\t\t\tversioning = this.Versioning.MatrixWorldNeedsUpdate;\n\n\t\t}\n\n\t\t// determine how the property gets bound\n\t\tlet bindingType = this.BindingType.Direct;\n\n\t\tif ( propertyIndex !== undefined ) {\n\n\t\t\t// access a sub element of the property array (only primitives are supported right now)\n\n\t\t\tif ( propertyName === 'morphTargetInfluences' ) {\n\n\t\t\t\t// potential optimization, skip this if propertyIndex is already an integer, and convert the integer string to a true integer.\n\n\t\t\t\t// support resolving morphTarget names into indices.\n\t\t\t\tif ( ! targetObject.geometry ) {\n\n\t\t\t\t\tconsole.error( 'THREE.PropertyBinding: Can not bind to morphTargetInfluences because node does not have a geometry.', this );\n\t\t\t\t\treturn;\n\n\t\t\t\t}\n\n\t\t\t\tif ( targetObject.geometry.isBufferGeometry ) {\n\n\t\t\t\t\tif ( ! targetObject.geometry.morphAttributes ) {\n\n\t\t\t\t\t\tconsole.error( 'THREE.PropertyBinding: Can not bind to morphTargetInfluences because node does not have a geometry.morphAttributes.', this );\n\t\t\t\t\t\treturn;\n\n\t\t\t\t\t}\n\n\t\t\t\t\tif ( targetObject.morphTargetDictionary[ propertyIndex ] !== undefined ) {\n\n\t\t\t\t\t\tpropertyIndex = targetObject.morphTargetDictionary[ propertyIndex ];\n\n\t\t\t\t\t}\n\n\n\t\t\t\t} else {\n\n\t\t\t\t\tconsole.error( 'THREE.PropertyBinding: Can not bind to morphTargetInfluences on THREE.Geometry. Use THREE.BufferGeometry instead.', this );\n\t\t\t\t\treturn;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tbindingType = this.BindingType.ArrayElement;\n\n\t\t\tthis.resolvedProperty = nodeProperty;\n\t\t\tthis.propertyIndex = propertyIndex;\n\n\t\t} else if ( nodeProperty.fromArray !== undefined && nodeProperty.toArray !== undefined ) {\n\n\t\t\t// must use copy for Object3D.Euler/Quaternion\n\n\t\t\tbindingType = this.BindingType.HasFromToArray;\n\n\t\t\tthis.resolvedProperty = nodeProperty;\n\n\t\t} else if ( Array.isArray( nodeProperty ) ) {\n\n\t\t\tbindingType = this.BindingType.EntireArray;\n\n\t\t\tthis.resolvedProperty = nodeProperty;\n\n\t\t} else {\n\n\t\t\tthis.propertyName = propertyName;\n\n\t\t}\n\n\t\t// select getter / setter\n\t\tthis.getValue = this.GetterByBindingType[ bindingType ];\n\t\tthis.setValue = this.SetterByBindingTypeAndVersioning[ bindingType ][ versioning ];\n\n\t},\n\n\tunbind: function () {\n\n\t\tthis.node = null;\n\n\t\t// back to the prototype version of getValue / setValue\n\t\t// note: avoiding to mutate the shape of 'this' via 'delete'\n\t\tthis.getValue = this._getValue_unbound;\n\t\tthis.setValue = this._setValue_unbound;\n\n\t}\n\n} );\n\n// DECLARE ALIAS AFTER assign prototype\nObject.assign( PropertyBinding.prototype, {\n\n\t// initial state of these methods that calls 'bind'\n\t_getValue_unbound: PropertyBinding.prototype.getValue,\n\t_setValue_unbound: PropertyBinding.prototype.setValue,\n\n} );\n\n/**\n *\n * A group of objects that receives a shared animation state.\n *\n * Usage:\n *\n *  - Add objects you would otherwise pass as 'root' to the\n *    constructor or the .clipAction method of AnimationMixer.\n *\n *  - Instead pass this object as 'root'.\n *\n *  - You can also add and remove objects later when the mixer\n *    is running.\n *\n * Note:\n *\n *    Objects of this class appear as one object to the mixer,\n *    so cache control of the individual objects must be done\n *    on the group.\n *\n * Limitation:\n *\n *  - The animated properties must be compatible among the\n *    all objects in the group.\n *\n *  - A single property can either be controlled through a\n *    target group or directly, but not both.\n */\n\nfunction AnimationObjectGroup() {\n\n\tthis.uuid = MathUtils.generateUUID();\n\n\t// cached objects followed by the active ones\n\tthis._objects = Array.prototype.slice.call( arguments );\n\n\tthis.nCachedObjects_ = 0; // threshold\n\t// note: read by PropertyBinding.Composite\n\n\tconst indices = {};\n\tthis._indicesByUUID = indices; // for bookkeeping\n\n\tfor ( let i = 0, n = arguments.length; i !== n; ++ i ) {\n\n\t\tindices[ arguments[ i ].uuid ] = i;\n\n\t}\n\n\tthis._paths = []; // inside: string\n\tthis._parsedPaths = []; // inside: { we don't care, here }\n\tthis._bindings = []; // inside: Array< PropertyBinding >\n\tthis._bindingsIndicesByPath = {}; // inside: indices in these arrays\n\n\tconst scope = this;\n\n\tthis.stats = {\n\n\t\tobjects: {\n\t\t\tget total() {\n\n\t\t\t\treturn scope._objects.length;\n\n\t\t\t},\n\t\t\tget inUse() {\n\n\t\t\t\treturn this.total - scope.nCachedObjects_;\n\n\t\t\t}\n\t\t},\n\t\tget bindingsPerObject() {\n\n\t\t\treturn scope._bindings.length;\n\n\t\t}\n\n\t};\n\n}\n\nObject.assign( AnimationObjectGroup.prototype, {\n\n\tisAnimationObjectGroup: true,\n\n\tadd: function () {\n\n\t\tconst objects = this._objects,\n\t\t\tindicesByUUID = this._indicesByUUID,\n\t\t\tpaths = this._paths,\n\t\t\tparsedPaths = this._parsedPaths,\n\t\t\tbindings = this._bindings,\n\t\t\tnBindings = bindings.length;\n\n\t\tlet knownObject = undefined,\n\t\t\tnObjects = objects.length,\n\t\t\tnCachedObjects = this.nCachedObjects_;\n\n\t\tfor ( let i = 0, n = arguments.length; i !== n; ++ i ) {\n\n\t\t\tconst object = arguments[ i ],\n\t\t\t\tuuid = object.uuid;\n\t\t\tlet index = indicesByUUID[ uuid ];\n\n\t\t\tif ( index === undefined ) {\n\n\t\t\t\t// unknown object -> add it to the ACTIVE region\n\n\t\t\t\tindex = nObjects ++;\n\t\t\t\tindicesByUUID[ uuid ] = index;\n\t\t\t\tobjects.push( object );\n\n\t\t\t\t// accounting is done, now do the same for all bindings\n\n\t\t\t\tfor ( let j = 0, m = nBindings; j !== m; ++ j ) {\n\n\t\t\t\t\tbindings[ j ].push( new PropertyBinding( object, paths[ j ], parsedPaths[ j ] ) );\n\n\t\t\t\t}\n\n\t\t\t} else if ( index < nCachedObjects ) {\n\n\t\t\t\tknownObject = objects[ index ];\n\n\t\t\t\t// move existing object to the ACTIVE region\n\n\t\t\t\tconst firstActiveIndex = -- nCachedObjects,\n\t\t\t\t\tlastCachedObject = objects[ firstActiveIndex ];\n\n\t\t\t\tindicesByUUID[ lastCachedObject.uuid ] = index;\n\t\t\t\tobjects[ index ] = lastCachedObject;\n\n\t\t\t\tindicesByUUID[ uuid ] = firstActiveIndex;\n\t\t\t\tobjects[ firstActiveIndex ] = object;\n\n\t\t\t\t// accounting is done, now do the same for all bindings\n\n\t\t\t\tfor ( let j = 0, m = nBindings; j !== m; ++ j ) {\n\n\t\t\t\t\tconst bindingsForPath = bindings[ j ],\n\t\t\t\t\t\tlastCached = bindingsForPath[ firstActiveIndex ];\n\n\t\t\t\t\tlet binding = bindingsForPath[ index ];\n\n\t\t\t\t\tbindingsForPath[ index ] = lastCached;\n\n\t\t\t\t\tif ( binding === undefined ) {\n\n\t\t\t\t\t\t// since we do not bother to create new bindings\n\t\t\t\t\t\t// for objects that are cached, the binding may\n\t\t\t\t\t\t// or may not exist\n\n\t\t\t\t\t\tbinding = new PropertyBinding( object, paths[ j ], parsedPaths[ j ] );\n\n\t\t\t\t\t}\n\n\t\t\t\t\tbindingsForPath[ firstActiveIndex ] = binding;\n\n\t\t\t\t}\n\n\t\t\t} else if ( objects[ index ] !== knownObject ) {\n\n\t\t\t\tconsole.error( 'THREE.AnimationObjectGroup: Different objects with the same UUID ' +\n\t\t\t\t\t'detected. Clean the caches or recreate your infrastructure when reloading scenes.' );\n\n\t\t\t} // else the object is already where we want it to be\n\n\t\t} // for arguments\n\n\t\tthis.nCachedObjects_ = nCachedObjects;\n\n\t},\n\n\tremove: function () {\n\n\t\tconst objects = this._objects,\n\t\t\tindicesByUUID = this._indicesByUUID,\n\t\t\tbindings = this._bindings,\n\t\t\tnBindings = bindings.length;\n\n\t\tlet nCachedObjects = this.nCachedObjects_;\n\n\t\tfor ( let i = 0, n = arguments.length; i !== n; ++ i ) {\n\n\t\t\tconst object = arguments[ i ],\n\t\t\t\tuuid = object.uuid,\n\t\t\t\tindex = indicesByUUID[ uuid ];\n\n\t\t\tif ( index !== undefined && index >= nCachedObjects ) {\n\n\t\t\t\t// move existing object into the CACHED region\n\n\t\t\t\tconst lastCachedIndex = nCachedObjects ++,\n\t\t\t\t\tfirstActiveObject = objects[ lastCachedIndex ];\n\n\t\t\t\tindicesByUUID[ firstActiveObject.uuid ] = index;\n\t\t\t\tobjects[ index ] = firstActiveObject;\n\n\t\t\t\tindicesByUUID[ uuid ] = lastCachedIndex;\n\t\t\t\tobjects[ lastCachedIndex ] = object;\n\n\t\t\t\t// accounting is done, now do the same for all bindings\n\n\t\t\t\tfor ( let j = 0, m = nBindings; j !== m; ++ j ) {\n\n\t\t\t\t\tconst bindingsForPath = bindings[ j ],\n\t\t\t\t\t\tfirstActive = bindingsForPath[ lastCachedIndex ],\n\t\t\t\t\t\tbinding = bindingsForPath[ index ];\n\n\t\t\t\t\tbindingsForPath[ index ] = firstActive;\n\t\t\t\t\tbindingsForPath[ lastCachedIndex ] = binding;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t} // for arguments\n\n\t\tthis.nCachedObjects_ = nCachedObjects;\n\n\t},\n\n\t// remove & forget\n\tuncache: function () {\n\n\t\tconst objects = this._objects,\n\t\t\tindicesByUUID = this._indicesByUUID,\n\t\t\tbindings = this._bindings,\n\t\t\tnBindings = bindings.length;\n\n\t\tlet nCachedObjects = this.nCachedObjects_,\n\t\t\tnObjects = objects.length;\n\n\t\tfor ( let i = 0, n = arguments.length; i !== n; ++ i ) {\n\n\t\t\tconst object = arguments[ i ],\n\t\t\t\tuuid = object.uuid,\n\t\t\t\tindex = indicesByUUID[ uuid ];\n\n\t\t\tif ( index !== undefined ) {\n\n\t\t\t\tdelete indicesByUUID[ uuid ];\n\n\t\t\t\tif ( index < nCachedObjects ) {\n\n\t\t\t\t\t// object is cached, shrink the CACHED region\n\n\t\t\t\t\tconst firstActiveIndex = -- nCachedObjects,\n\t\t\t\t\t\tlastCachedObject = objects[ firstActiveIndex ],\n\t\t\t\t\t\tlastIndex = -- nObjects,\n\t\t\t\t\t\tlastObject = objects[ lastIndex ];\n\n\t\t\t\t\t// last cached object takes this object's place\n\t\t\t\t\tindicesByUUID[ lastCachedObject.uuid ] = index;\n\t\t\t\t\tobjects[ index ] = lastCachedObject;\n\n\t\t\t\t\t// last object goes to the activated slot and pop\n\t\t\t\t\tindicesByUUID[ lastObject.uuid ] = firstActiveIndex;\n\t\t\t\t\tobjects[ firstActiveIndex ] = lastObject;\n\t\t\t\t\tobjects.pop();\n\n\t\t\t\t\t// accounting is done, now do the same for all bindings\n\n\t\t\t\t\tfor ( let j = 0, m = nBindings; j !== m; ++ j ) {\n\n\t\t\t\t\t\tconst bindingsForPath = bindings[ j ],\n\t\t\t\t\t\t\tlastCached = bindingsForPath[ firstActiveIndex ],\n\t\t\t\t\t\t\tlast = bindingsForPath[ lastIndex ];\n\n\t\t\t\t\t\tbindingsForPath[ index ] = lastCached;\n\t\t\t\t\t\tbindingsForPath[ firstActiveIndex ] = last;\n\t\t\t\t\t\tbindingsForPath.pop();\n\n\t\t\t\t\t}\n\n\t\t\t\t} else {\n\n\t\t\t\t\t// object is active, just swap with the last and pop\n\n\t\t\t\t\tconst lastIndex = -- nObjects,\n\t\t\t\t\t\tlastObject = objects[ lastIndex ];\n\n\t\t\t\t\tif ( lastIndex > 0 ) {\n\n\t\t\t\t\t\tindicesByUUID[ lastObject.uuid ] = index;\n\n\t\t\t\t\t}\n\n\t\t\t\t\tobjects[ index ] = lastObject;\n\t\t\t\t\tobjects.pop();\n\n\t\t\t\t\t// accounting is done, now do the same for all bindings\n\n\t\t\t\t\tfor ( let j = 0, m = nBindings; j !== m; ++ j ) {\n\n\t\t\t\t\t\tconst bindingsForPath = bindings[ j ];\n\n\t\t\t\t\t\tbindingsForPath[ index ] = bindingsForPath[ lastIndex ];\n\t\t\t\t\t\tbindingsForPath.pop();\n\n\t\t\t\t\t}\n\n\t\t\t\t} // cached or active\n\n\t\t\t} // if object is known\n\n\t\t} // for arguments\n\n\t\tthis.nCachedObjects_ = nCachedObjects;\n\n\t},\n\n\t// Internal interface used by befriended PropertyBinding.Composite:\n\n\tsubscribe_: function ( path, parsedPath ) {\n\n\t\t// returns an array of bindings for the given path that is changed\n\t\t// according to the contained objects in the group\n\n\t\tconst indicesByPath = this._bindingsIndicesByPath;\n\t\tlet index = indicesByPath[ path ];\n\t\tconst bindings = this._bindings;\n\n\t\tif ( index !== undefined ) return bindings[ index ];\n\n\t\tconst paths = this._paths,\n\t\t\tparsedPaths = this._parsedPaths,\n\t\t\tobjects = this._objects,\n\t\t\tnObjects = objects.length,\n\t\t\tnCachedObjects = this.nCachedObjects_,\n\t\t\tbindingsForPath = new Array( nObjects );\n\n\t\tindex = bindings.length;\n\n\t\tindicesByPath[ path ] = index;\n\n\t\tpaths.push( path );\n\t\tparsedPaths.push( parsedPath );\n\t\tbindings.push( bindingsForPath );\n\n\t\tfor ( let i = nCachedObjects, n = objects.length; i !== n; ++ i ) {\n\n\t\t\tconst object = objects[ i ];\n\t\t\tbindingsForPath[ i ] = new PropertyBinding( object, path, parsedPath );\n\n\t\t}\n\n\t\treturn bindingsForPath;\n\n\t},\n\n\tunsubscribe_: function ( path ) {\n\n\t\t// tells the group to forget about a property path and no longer\n\t\t// update the array previously obtained with 'subscribe_'\n\n\t\tconst indicesByPath = this._bindingsIndicesByPath,\n\t\t\tindex = indicesByPath[ path ];\n\n\t\tif ( index !== undefined ) {\n\n\t\t\tconst paths = this._paths,\n\t\t\t\tparsedPaths = this._parsedPaths,\n\t\t\t\tbindings = this._bindings,\n\t\t\t\tlastBindingsIndex = bindings.length - 1,\n\t\t\t\tlastBindings = bindings[ lastBindingsIndex ],\n\t\t\t\tlastBindingsPath = path[ lastBindingsIndex ];\n\n\t\t\tindicesByPath[ lastBindingsPath ] = index;\n\n\t\t\tbindings[ index ] = lastBindings;\n\t\t\tbindings.pop();\n\n\t\t\tparsedPaths[ index ] = parsedPaths[ lastBindingsIndex ];\n\t\t\tparsedPaths.pop();\n\n\t\t\tpaths[ index ] = paths[ lastBindingsIndex ];\n\t\t\tpaths.pop();\n\n\t\t}\n\n\t}\n\n} );\n\nclass AnimationAction {\n\n\tconstructor( mixer, clip, localRoot = null, blendMode = clip.blendMode ) {\n\n\t\tthis._mixer = mixer;\n\t\tthis._clip = clip;\n\t\tthis._localRoot = localRoot;\n\t\tthis.blendMode = blendMode;\n\n\t\tconst tracks = clip.tracks,\n\t\t\tnTracks = tracks.length,\n\t\t\tinterpolants = new Array( nTracks );\n\n\t\tconst interpolantSettings = {\n\t\t\tendingStart: ZeroCurvatureEnding,\n\t\t\tendingEnd: ZeroCurvatureEnding\n\t\t};\n\n\t\tfor ( let i = 0; i !== nTracks; ++ i ) {\n\n\t\t\tconst interpolant = tracks[ i ].createInterpolant( null );\n\t\t\tinterpolants[ i ] = interpolant;\n\t\t\tinterpolant.settings = interpolantSettings;\n\n\t\t}\n\n\t\tthis._interpolantSettings = interpolantSettings;\n\n\t\tthis._interpolants = interpolants; // bound by the mixer\n\n\t\t// inside: PropertyMixer (managed by the mixer)\n\t\tthis._propertyBindings = new Array( nTracks );\n\n\t\tthis._cacheIndex = null; // for the memory manager\n\t\tthis._byClipCacheIndex = null; // for the memory manager\n\n\t\tthis._timeScaleInterpolant = null;\n\t\tthis._weightInterpolant = null;\n\n\t\tthis.loop = LoopRepeat;\n\t\tthis._loopCount = - 1;\n\n\t\t// global mixer time when the action is to be started\n\t\t// it's set back to 'null' upon start of the action\n\t\tthis._startTime = null;\n\n\t\t// scaled local time of the action\n\t\t// gets clamped or wrapped to 0..clip.duration according to loop\n\t\tthis.time = 0;\n\n\t\tthis.timeScale = 1;\n\t\tthis._effectiveTimeScale = 1;\n\n\t\tthis.weight = 1;\n\t\tthis._effectiveWeight = 1;\n\n\t\tthis.repetitions = Infinity; // no. of repetitions when looping\n\n\t\tthis.paused = false; // true -> zero effective time scale\n\t\tthis.enabled = true; // false -> zero effective weight\n\n\t\tthis.clampWhenFinished = false;// keep feeding the last frame?\n\n\t\tthis.zeroSlopeAtStart = true;// for smooth interpolation w/o separate\n\t\tthis.zeroSlopeAtEnd = true;// clips for start, loop and end\n\n\t}\n\n\t// State & Scheduling\n\n\tplay() {\n\n\t\tthis._mixer._activateAction( this );\n\n\t\treturn this;\n\n\t}\n\n\tstop() {\n\n\t\tthis._mixer._deactivateAction( this );\n\n\t\treturn this.reset();\n\n\t}\n\n\treset() {\n\n\t\tthis.paused = false;\n\t\tthis.enabled = true;\n\n\t\tthis.time = 0; // restart clip\n\t\tthis._loopCount = - 1;// forget previous loops\n\t\tthis._startTime = null;// forget scheduling\n\n\t\treturn this.stopFading().stopWarping();\n\n\t}\n\n\tisRunning() {\n\n\t\treturn this.enabled && ! this.paused && this.timeScale !== 0 &&\n\t\t\tthis._startTime === null && this._mixer._isActiveAction( this );\n\n\t}\n\n\t// return true when play has been called\n\tisScheduled() {\n\n\t\treturn this._mixer._isActiveAction( this );\n\n\t}\n\n\tstartAt( time ) {\n\n\t\tthis._startTime = time;\n\n\t\treturn this;\n\n\t}\n\n\tsetLoop( mode, repetitions ) {\n\n\t\tthis.loop = mode;\n\t\tthis.repetitions = repetitions;\n\n\t\treturn this;\n\n\t}\n\n\t// Weight\n\n\t// set the weight stopping any scheduled fading\n\t// although .enabled = false yields an effective weight of zero, this\n\t// method does *not* change .enabled, because it would be confusing\n\tsetEffectiveWeight( weight ) {\n\n\t\tthis.weight = weight;\n\n\t\t// note: same logic as when updated at runtime\n\t\tthis._effectiveWeight = this.enabled ? weight : 0;\n\n\t\treturn this.stopFading();\n\n\t}\n\n\t// return the weight considering fading and .enabled\n\tgetEffectiveWeight() {\n\n\t\treturn this._effectiveWeight;\n\n\t}\n\n\tfadeIn( duration ) {\n\n\t\treturn this._scheduleFading( duration, 0, 1 );\n\n\t}\n\n\tfadeOut( duration ) {\n\n\t\treturn this._scheduleFading( duration, 1, 0 );\n\n\t}\n\n\tcrossFadeFrom( fadeOutAction, duration, warp ) {\n\n\t\tfadeOutAction.fadeOut( duration );\n\t\tthis.fadeIn( duration );\n\n\t\tif ( warp ) {\n\n\t\t\tconst fadeInDuration = this._clip.duration,\n\t\t\t\tfadeOutDuration = fadeOutAction._clip.duration,\n\n\t\t\t\tstartEndRatio = fadeOutDuration / fadeInDuration,\n\t\t\t\tendStartRatio = fadeInDuration / fadeOutDuration;\n\n\t\t\tfadeOutAction.warp( 1.0, startEndRatio, duration );\n\t\t\tthis.warp( endStartRatio, 1.0, duration );\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n\tcrossFadeTo( fadeInAction, duration, warp ) {\n\n\t\treturn fadeInAction.crossFadeFrom( this, duration, warp );\n\n\t}\n\n\tstopFading() {\n\n\t\tconst weightInterpolant = this._weightInterpolant;\n\n\t\tif ( weightInterpolant !== null ) {\n\n\t\t\tthis._weightInterpolant = null;\n\t\t\tthis._mixer._takeBackControlInterpolant( weightInterpolant );\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n\t// Time Scale Control\n\n\t// set the time scale stopping any scheduled warping\n\t// although .paused = true yields an effective time scale of zero, this\n\t// method does *not* change .paused, because it would be confusing\n\tsetEffectiveTimeScale( timeScale ) {\n\n\t\tthis.timeScale = timeScale;\n\t\tthis._effectiveTimeScale = this.paused ? 0 : timeScale;\n\n\t\treturn this.stopWarping();\n\n\t}\n\n\t// return the time scale considering warping and .paused\n\tgetEffectiveTimeScale() {\n\n\t\treturn this._effectiveTimeScale;\n\n\t}\n\n\tsetDuration( duration ) {\n\n\t\tthis.timeScale = this._clip.duration / duration;\n\n\t\treturn this.stopWarping();\n\n\t}\n\n\tsyncWith( action ) {\n\n\t\tthis.time = action.time;\n\t\tthis.timeScale = action.timeScale;\n\n\t\treturn this.stopWarping();\n\n\t}\n\n\thalt( duration ) {\n\n\t\treturn this.warp( this._effectiveTimeScale, 0, duration );\n\n\t}\n\n\twarp( startTimeScale, endTimeScale, duration ) {\n\n\t\tconst mixer = this._mixer,\n\t\t\tnow = mixer.time,\n\t\t\ttimeScale = this.timeScale;\n\n\t\tlet interpolant = this._timeScaleInterpolant;\n\n\t\tif ( interpolant === null ) {\n\n\t\t\tinterpolant = mixer._lendControlInterpolant();\n\t\t\tthis._timeScaleInterpolant = interpolant;\n\n\t\t}\n\n\t\tconst times = interpolant.parameterPositions,\n\t\t\tvalues = interpolant.sampleValues;\n\n\t\ttimes[ 0 ] = now;\n\t\ttimes[ 1 ] = now + duration;\n\n\t\tvalues[ 0 ] = startTimeScale / timeScale;\n\t\tvalues[ 1 ] = endTimeScale / timeScale;\n\n\t\treturn this;\n\n\t}\n\n\tstopWarping() {\n\n\t\tconst timeScaleInterpolant = this._timeScaleInterpolant;\n\n\t\tif ( timeScaleInterpolant !== null ) {\n\n\t\t\tthis._timeScaleInterpolant = null;\n\t\t\tthis._mixer._takeBackControlInterpolant( timeScaleInterpolant );\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n\t// Object Accessors\n\n\tgetMixer() {\n\n\t\treturn this._mixer;\n\n\t}\n\n\tgetClip() {\n\n\t\treturn this._clip;\n\n\t}\n\n\tgetRoot() {\n\n\t\treturn this._localRoot || this._mixer._root;\n\n\t}\n\n\t// Interna\n\n\t_update( time, deltaTime, timeDirection, accuIndex ) {\n\n\t\t// called by the mixer\n\n\t\tif ( ! this.enabled ) {\n\n\t\t\t// call ._updateWeight() to update ._effectiveWeight\n\n\t\t\tthis._updateWeight( time );\n\t\t\treturn;\n\n\t\t}\n\n\t\tconst startTime = this._startTime;\n\n\t\tif ( startTime !== null ) {\n\n\t\t\t// check for scheduled start of action\n\n\t\t\tconst timeRunning = ( time - startTime ) * timeDirection;\n\t\t\tif ( timeRunning < 0 || timeDirection === 0 ) {\n\n\t\t\t\treturn; // yet to come / don't decide when delta = 0\n\n\t\t\t}\n\n\t\t\t// start\n\n\t\t\tthis._startTime = null; // unschedule\n\t\t\tdeltaTime = timeDirection * timeRunning;\n\n\t\t}\n\n\t\t// apply time scale and advance time\n\n\t\tdeltaTime *= this._updateTimeScale( time );\n\t\tconst clipTime = this._updateTime( deltaTime );\n\n\t\t// note: _updateTime may disable the action resulting in\n\t\t// an effective weight of 0\n\n\t\tconst weight = this._updateWeight( time );\n\n\t\tif ( weight > 0 ) {\n\n\t\t\tconst interpolants = this._interpolants;\n\t\t\tconst propertyMixers = this._propertyBindings;\n\n\t\t\tswitch ( this.blendMode ) {\n\n\t\t\t\tcase AdditiveAnimationBlendMode:\n\n\t\t\t\t\tfor ( let j = 0, m = interpolants.length; j !== m; ++ j ) {\n\n\t\t\t\t\t\tinterpolants[ j ].evaluate( clipTime );\n\t\t\t\t\t\tpropertyMixers[ j ].accumulateAdditive( weight );\n\n\t\t\t\t\t}\n\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase NormalAnimationBlendMode:\n\t\t\t\tdefault:\n\n\t\t\t\t\tfor ( let j = 0, m = interpolants.length; j !== m; ++ j ) {\n\n\t\t\t\t\t\tinterpolants[ j ].evaluate( clipTime );\n\t\t\t\t\t\tpropertyMixers[ j ].accumulate( accuIndex, weight );\n\n\t\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\t_updateWeight( time ) {\n\n\t\tlet weight = 0;\n\n\t\tif ( this.enabled ) {\n\n\t\t\tweight = this.weight;\n\t\t\tconst interpolant = this._weightInterpolant;\n\n\t\t\tif ( interpolant !== null ) {\n\n\t\t\t\tconst interpolantValue = interpolant.evaluate( time )[ 0 ];\n\n\t\t\t\tweight *= interpolantValue;\n\n\t\t\t\tif ( time > interpolant.parameterPositions[ 1 ] ) {\n\n\t\t\t\t\tthis.stopFading();\n\n\t\t\t\t\tif ( interpolantValue === 0 ) {\n\n\t\t\t\t\t\t// faded out, disable\n\t\t\t\t\t\tthis.enabled = false;\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\tthis._effectiveWeight = weight;\n\t\treturn weight;\n\n\t}\n\n\t_updateTimeScale( time ) {\n\n\t\tlet timeScale = 0;\n\n\t\tif ( ! this.paused ) {\n\n\t\t\ttimeScale = this.timeScale;\n\n\t\t\tconst interpolant = this._timeScaleInterpolant;\n\n\t\t\tif ( interpolant !== null ) {\n\n\t\t\t\tconst interpolantValue = interpolant.evaluate( time )[ 0 ];\n\n\t\t\t\ttimeScale *= interpolantValue;\n\n\t\t\t\tif ( time > interpolant.parameterPositions[ 1 ] ) {\n\n\t\t\t\t\tthis.stopWarping();\n\n\t\t\t\t\tif ( timeScale === 0 ) {\n\n\t\t\t\t\t\t// motion has halted, pause\n\t\t\t\t\t\tthis.paused = true;\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\t// warp done - apply final time scale\n\t\t\t\t\t\tthis.timeScale = timeScale;\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\tthis._effectiveTimeScale = timeScale;\n\t\treturn timeScale;\n\n\t}\n\n\t_updateTime( deltaTime ) {\n\n\t\tconst duration = this._clip.duration;\n\t\tconst loop = this.loop;\n\n\t\tlet time = this.time + deltaTime;\n\t\tlet loopCount = this._loopCount;\n\n\t\tconst pingPong = ( loop === LoopPingPong );\n\n\t\tif ( deltaTime === 0 ) {\n\n\t\t\tif ( loopCount === - 1 ) return time;\n\n\t\t\treturn ( pingPong && ( loopCount & 1 ) === 1 ) ? duration - time : time;\n\n\t\t}\n\n\t\tif ( loop === LoopOnce ) {\n\n\t\t\tif ( loopCount === - 1 ) {\n\n\t\t\t\t// just started\n\n\t\t\t\tthis._loopCount = 0;\n\t\t\t\tthis._setEndings( true, true, false );\n\n\t\t\t}\n\n\t\t\thandle_stop: {\n\n\t\t\t\tif ( time >= duration ) {\n\n\t\t\t\t\ttime = duration;\n\n\t\t\t\t} else if ( time < 0 ) {\n\n\t\t\t\t\ttime = 0;\n\n\t\t\t\t} else {\n\n\t\t\t\t\tthis.time = time;\n\n\t\t\t\t\tbreak handle_stop;\n\n\t\t\t\t}\n\n\t\t\t\tif ( this.clampWhenFinished ) this.paused = true;\n\t\t\t\telse this.enabled = false;\n\n\t\t\t\tthis.time = time;\n\n\t\t\t\tthis._mixer.dispatchEvent( {\n\t\t\t\t\ttype: 'finished', action: this,\n\t\t\t\t\tdirection: deltaTime < 0 ? - 1 : 1\n\t\t\t\t} );\n\n\t\t\t}\n\n\t\t} else { // repetitive Repeat or PingPong\n\n\t\t\tif ( loopCount === - 1 ) {\n\n\t\t\t\t// just started\n\n\t\t\t\tif ( deltaTime >= 0 ) {\n\n\t\t\t\t\tloopCount = 0;\n\n\t\t\t\t\tthis._setEndings( true, this.repetitions === 0, pingPong );\n\n\t\t\t\t} else {\n\n\t\t\t\t\t// when looping in reverse direction, the initial\n\t\t\t\t\t// transition through zero counts as a repetition,\n\t\t\t\t\t// so leave loopCount at -1\n\n\t\t\t\t\tthis._setEndings( this.repetitions === 0, true, pingPong );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tif ( time >= duration || time < 0 ) {\n\n\t\t\t\t// wrap around\n\n\t\t\t\tconst loopDelta = Math.floor( time / duration ); // signed\n\t\t\t\ttime -= duration * loopDelta;\n\n\t\t\t\tloopCount += Math.abs( loopDelta );\n\n\t\t\t\tconst pending = this.repetitions - loopCount;\n\n\t\t\t\tif ( pending <= 0 ) {\n\n\t\t\t\t\t// have to stop (switch state, clamp time, fire event)\n\n\t\t\t\t\tif ( this.clampWhenFinished ) this.paused = true;\n\t\t\t\t\telse this.enabled = false;\n\n\t\t\t\t\ttime = deltaTime > 0 ? duration : 0;\n\n\t\t\t\t\tthis.time = time;\n\n\t\t\t\t\tthis._mixer.dispatchEvent( {\n\t\t\t\t\t\ttype: 'finished', action: this,\n\t\t\t\t\t\tdirection: deltaTime > 0 ? 1 : - 1\n\t\t\t\t\t} );\n\n\t\t\t\t} else {\n\n\t\t\t\t\t// keep running\n\n\t\t\t\t\tif ( pending === 1 ) {\n\n\t\t\t\t\t\t// entering the last round\n\n\t\t\t\t\t\tconst atStart = deltaTime < 0;\n\t\t\t\t\t\tthis._setEndings( atStart, ! atStart, pingPong );\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\tthis._setEndings( false, false, pingPong );\n\n\t\t\t\t\t}\n\n\t\t\t\t\tthis._loopCount = loopCount;\n\n\t\t\t\t\tthis.time = time;\n\n\t\t\t\t\tthis._mixer.dispatchEvent( {\n\t\t\t\t\t\ttype: 'loop', action: this, loopDelta: loopDelta\n\t\t\t\t\t} );\n\n\t\t\t\t}\n\n\t\t\t} else {\n\n\t\t\t\tthis.time = time;\n\n\t\t\t}\n\n\t\t\tif ( pingPong && ( loopCount & 1 ) === 1 ) {\n\n\t\t\t\t// invert time for the \"pong round\"\n\n\t\t\t\treturn duration - time;\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn time;\n\n\t}\n\n\t_setEndings( atStart, atEnd, pingPong ) {\n\n\t\tconst settings = this._interpolantSettings;\n\n\t\tif ( pingPong ) {\n\n\t\t\tsettings.endingStart = ZeroSlopeEnding;\n\t\t\tsettings.endingEnd = ZeroSlopeEnding;\n\n\t\t} else {\n\n\t\t\t// assuming for LoopOnce atStart == atEnd == true\n\n\t\t\tif ( atStart ) {\n\n\t\t\t\tsettings.endingStart = this.zeroSlopeAtStart ? ZeroSlopeEnding : ZeroCurvatureEnding;\n\n\t\t\t} else {\n\n\t\t\t\tsettings.endingStart = WrapAroundEnding;\n\n\t\t\t}\n\n\t\t\tif ( atEnd ) {\n\n\t\t\t\tsettings.endingEnd = this.zeroSlopeAtEnd ? ZeroSlopeEnding : ZeroCurvatureEnding;\n\n\t\t\t} else {\n\n\t\t\t\tsettings.endingEnd \t = WrapAroundEnding;\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\t_scheduleFading( duration, weightNow, weightThen ) {\n\n\t\tconst mixer = this._mixer, now = mixer.time;\n\t\tlet interpolant = this._weightInterpolant;\n\n\t\tif ( interpolant === null ) {\n\n\t\t\tinterpolant = mixer._lendControlInterpolant();\n\t\t\tthis._weightInterpolant = interpolant;\n\n\t\t}\n\n\t\tconst times = interpolant.parameterPositions,\n\t\t\tvalues = interpolant.sampleValues;\n\n\t\ttimes[ 0 ] = now;\n\t\tvalues[ 0 ] = weightNow;\n\t\ttimes[ 1 ] = now + duration;\n\t\tvalues[ 1 ] = weightThen;\n\n\t\treturn this;\n\n\t}\n\n}\n\nfunction AnimationMixer( root ) {\n\n\tthis._root = root;\n\tthis._initMemoryManager();\n\tthis._accuIndex = 0;\n\n\tthis.time = 0;\n\n\tthis.timeScale = 1.0;\n\n}\n\nAnimationMixer.prototype = Object.assign( Object.create( EventDispatcher.prototype ), {\n\n\tconstructor: AnimationMixer,\n\n\t_bindAction: function ( action, prototypeAction ) {\n\n\t\tconst root = action._localRoot || this._root,\n\t\t\ttracks = action._clip.tracks,\n\t\t\tnTracks = tracks.length,\n\t\t\tbindings = action._propertyBindings,\n\t\t\tinterpolants = action._interpolants,\n\t\t\trootUuid = root.uuid,\n\t\t\tbindingsByRoot = this._bindingsByRootAndName;\n\n\t\tlet bindingsByName = bindingsByRoot[ rootUuid ];\n\n\t\tif ( bindingsByName === undefined ) {\n\n\t\t\tbindingsByName = {};\n\t\t\tbindingsByRoot[ rootUuid ] = bindingsByName;\n\n\t\t}\n\n\t\tfor ( let i = 0; i !== nTracks; ++ i ) {\n\n\t\t\tconst track = tracks[ i ],\n\t\t\t\ttrackName = track.name;\n\n\t\t\tlet binding = bindingsByName[ trackName ];\n\n\t\t\tif ( binding !== undefined ) {\n\n\t\t\t\tbindings[ i ] = binding;\n\n\t\t\t} else {\n\n\t\t\t\tbinding = bindings[ i ];\n\n\t\t\t\tif ( binding !== undefined ) {\n\n\t\t\t\t\t// existing binding, make sure the cache knows\n\n\t\t\t\t\tif ( binding._cacheIndex === null ) {\n\n\t\t\t\t\t\t++ binding.referenceCount;\n\t\t\t\t\t\tthis._addInactiveBinding( binding, rootUuid, trackName );\n\n\t\t\t\t\t}\n\n\t\t\t\t\tcontinue;\n\n\t\t\t\t}\n\n\t\t\t\tconst path = prototypeAction && prototypeAction.\n\t\t\t\t\t_propertyBindings[ i ].binding.parsedPath;\n\n\t\t\t\tbinding = new PropertyMixer(\n\t\t\t\t\tPropertyBinding.create( root, trackName, path ),\n\t\t\t\t\ttrack.ValueTypeName, track.getValueSize() );\n\n\t\t\t\t++ binding.referenceCount;\n\t\t\t\tthis._addInactiveBinding( binding, rootUuid, trackName );\n\n\t\t\t\tbindings[ i ] = binding;\n\n\t\t\t}\n\n\t\t\tinterpolants[ i ].resultBuffer = binding.buffer;\n\n\t\t}\n\n\t},\n\n\t_activateAction: function ( action ) {\n\n\t\tif ( ! this._isActiveAction( action ) ) {\n\n\t\t\tif ( action._cacheIndex === null ) {\n\n\t\t\t\t// this action has been forgotten by the cache, but the user\n\t\t\t\t// appears to be still using it -> rebind\n\n\t\t\t\tconst rootUuid = ( action._localRoot || this._root ).uuid,\n\t\t\t\t\tclipUuid = action._clip.uuid,\n\t\t\t\t\tactionsForClip = this._actionsByClip[ clipUuid ];\n\n\t\t\t\tthis._bindAction( action,\n\t\t\t\t\tactionsForClip && actionsForClip.knownActions[ 0 ] );\n\n\t\t\t\tthis._addInactiveAction( action, clipUuid, rootUuid );\n\n\t\t\t}\n\n\t\t\tconst bindings = action._propertyBindings;\n\n\t\t\t// increment reference counts / sort out state\n\t\t\tfor ( let i = 0, n = bindings.length; i !== n; ++ i ) {\n\n\t\t\t\tconst binding = bindings[ i ];\n\n\t\t\t\tif ( binding.useCount ++ === 0 ) {\n\n\t\t\t\t\tthis._lendBinding( binding );\n\t\t\t\t\tbinding.saveOriginalState();\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tthis._lendAction( action );\n\n\t\t}\n\n\t},\n\n\t_deactivateAction: function ( action ) {\n\n\t\tif ( this._isActiveAction( action ) ) {\n\n\t\t\tconst bindings = action._propertyBindings;\n\n\t\t\t// decrement reference counts / sort out state\n\t\t\tfor ( let i = 0, n = bindings.length; i !== n; ++ i ) {\n\n\t\t\t\tconst binding = bindings[ i ];\n\n\t\t\t\tif ( -- binding.useCount === 0 ) {\n\n\t\t\t\t\tbinding.restoreOriginalState();\n\t\t\t\t\tthis._takeBackBinding( binding );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tthis._takeBackAction( action );\n\n\t\t}\n\n\t},\n\n\t// Memory manager\n\n\t_initMemoryManager: function () {\n\n\t\tthis._actions = []; // 'nActiveActions' followed by inactive ones\n\t\tthis._nActiveActions = 0;\n\n\t\tthis._actionsByClip = {};\n\t\t// inside:\n\t\t// {\n\t\t// \tknownActions: Array< AnimationAction > - used as prototypes\n\t\t// \tactionByRoot: AnimationAction - lookup\n\t\t// }\n\n\n\t\tthis._bindings = []; // 'nActiveBindings' followed by inactive ones\n\t\tthis._nActiveBindings = 0;\n\n\t\tthis._bindingsByRootAndName = {}; // inside: Map< name, PropertyMixer >\n\n\n\t\tthis._controlInterpolants = []; // same game as above\n\t\tthis._nActiveControlInterpolants = 0;\n\n\t\tconst scope = this;\n\n\t\tthis.stats = {\n\n\t\t\tactions: {\n\t\t\t\tget total() {\n\n\t\t\t\t\treturn scope._actions.length;\n\n\t\t\t\t},\n\t\t\t\tget inUse() {\n\n\t\t\t\t\treturn scope._nActiveActions;\n\n\t\t\t\t}\n\t\t\t},\n\t\t\tbindings: {\n\t\t\t\tget total() {\n\n\t\t\t\t\treturn scope._bindings.length;\n\n\t\t\t\t},\n\t\t\t\tget inUse() {\n\n\t\t\t\t\treturn scope._nActiveBindings;\n\n\t\t\t\t}\n\t\t\t},\n\t\t\tcontrolInterpolants: {\n\t\t\t\tget total() {\n\n\t\t\t\t\treturn scope._controlInterpolants.length;\n\n\t\t\t\t},\n\t\t\t\tget inUse() {\n\n\t\t\t\t\treturn scope._nActiveControlInterpolants;\n\n\t\t\t\t}\n\t\t\t}\n\n\t\t};\n\n\t},\n\n\t// Memory management for AnimationAction objects\n\n\t_isActiveAction: function ( action ) {\n\n\t\tconst index = action._cacheIndex;\n\t\treturn index !== null && index < this._nActiveActions;\n\n\t},\n\n\t_addInactiveAction: function ( action, clipUuid, rootUuid ) {\n\n\t\tconst actions = this._actions,\n\t\t\tactionsByClip = this._actionsByClip;\n\n\t\tlet actionsForClip = actionsByClip[ clipUuid ];\n\n\t\tif ( actionsForClip === undefined ) {\n\n\t\t\tactionsForClip = {\n\n\t\t\t\tknownActions: [ action ],\n\t\t\t\tactionByRoot: {}\n\n\t\t\t};\n\n\t\t\taction._byClipCacheIndex = 0;\n\n\t\t\tactionsByClip[ clipUuid ] = actionsForClip;\n\n\t\t} else {\n\n\t\t\tconst knownActions = actionsForClip.knownActions;\n\n\t\t\taction._byClipCacheIndex = knownActions.length;\n\t\t\tknownActions.push( action );\n\n\t\t}\n\n\t\taction._cacheIndex = actions.length;\n\t\tactions.push( action );\n\n\t\tactionsForClip.actionByRoot[ rootUuid ] = action;\n\n\t},\n\n\t_removeInactiveAction: function ( action ) {\n\n\t\tconst actions = this._actions,\n\t\t\tlastInactiveAction = actions[ actions.length - 1 ],\n\t\t\tcacheIndex = action._cacheIndex;\n\n\t\tlastInactiveAction._cacheIndex = cacheIndex;\n\t\tactions[ cacheIndex ] = lastInactiveAction;\n\t\tactions.pop();\n\n\t\taction._cacheIndex = null;\n\n\n\t\tconst clipUuid = action._clip.uuid,\n\t\t\tactionsByClip = this._actionsByClip,\n\t\t\tactionsForClip = actionsByClip[ clipUuid ],\n\t\t\tknownActionsForClip = actionsForClip.knownActions,\n\n\t\t\tlastKnownAction =\n\t\t\t\tknownActionsForClip[ knownActionsForClip.length - 1 ],\n\n\t\t\tbyClipCacheIndex = action._byClipCacheIndex;\n\n\t\tlastKnownAction._byClipCacheIndex = byClipCacheIndex;\n\t\tknownActionsForClip[ byClipCacheIndex ] = lastKnownAction;\n\t\tknownActionsForClip.pop();\n\n\t\taction._byClipCacheIndex = null;\n\n\n\t\tconst actionByRoot = actionsForClip.actionByRoot,\n\t\t\trootUuid = ( action._localRoot || this._root ).uuid;\n\n\t\tdelete actionByRoot[ rootUuid ];\n\n\t\tif ( knownActionsForClip.length === 0 ) {\n\n\t\t\tdelete actionsByClip[ clipUuid ];\n\n\t\t}\n\n\t\tthis._removeInactiveBindingsForAction( action );\n\n\t},\n\n\t_removeInactiveBindingsForAction: function ( action ) {\n\n\t\tconst bindings = action._propertyBindings;\n\n\t\tfor ( let i = 0, n = bindings.length; i !== n; ++ i ) {\n\n\t\t\tconst binding = bindings[ i ];\n\n\t\t\tif ( -- binding.referenceCount === 0 ) {\n\n\t\t\t\tthis._removeInactiveBinding( binding );\n\n\t\t\t}\n\n\t\t}\n\n\t},\n\n\t_lendAction: function ( action ) {\n\n\t\t// [ active actions |  inactive actions  ]\n\t\t// [  active actions >| inactive actions ]\n\t\t//                 s        a\n\t\t//                  <-swap->\n\t\t//                 a        s\n\n\t\tconst actions = this._actions,\n\t\t\tprevIndex = action._cacheIndex,\n\n\t\t\tlastActiveIndex = this._nActiveActions ++,\n\n\t\t\tfirstInactiveAction = actions[ lastActiveIndex ];\n\n\t\taction._cacheIndex = lastActiveIndex;\n\t\tactions[ lastActiveIndex ] = action;\n\n\t\tfirstInactiveAction._cacheIndex = prevIndex;\n\t\tactions[ prevIndex ] = firstInactiveAction;\n\n\t},\n\n\t_takeBackAction: function ( action ) {\n\n\t\t// [  active actions  | inactive actions ]\n\t\t// [ active actions |< inactive actions  ]\n\t\t//        a        s\n\t\t//         <-swap->\n\t\t//        s        a\n\n\t\tconst actions = this._actions,\n\t\t\tprevIndex = action._cacheIndex,\n\n\t\t\tfirstInactiveIndex = -- this._nActiveActions,\n\n\t\t\tlastActiveAction = actions[ firstInactiveIndex ];\n\n\t\taction._cacheIndex = firstInactiveIndex;\n\t\tactions[ firstInactiveIndex ] = action;\n\n\t\tlastActiveAction._cacheIndex = prevIndex;\n\t\tactions[ prevIndex ] = lastActiveAction;\n\n\t},\n\n\t// Memory management for PropertyMixer objects\n\n\t_addInactiveBinding: function ( binding, rootUuid, trackName ) {\n\n\t\tconst bindingsByRoot = this._bindingsByRootAndName,\n\t\t\tbindings = this._bindings;\n\n\t\tlet bindingByName = bindingsByRoot[ rootUuid ];\n\n\t\tif ( bindingByName === undefined ) {\n\n\t\t\tbindingByName = {};\n\t\t\tbindingsByRoot[ rootUuid ] = bindingByName;\n\n\t\t}\n\n\t\tbindingByName[ trackName ] = binding;\n\n\t\tbinding._cacheIndex = bindings.length;\n\t\tbindings.push( binding );\n\n\t},\n\n\t_removeInactiveBinding: function ( binding ) {\n\n\t\tconst bindings = this._bindings,\n\t\t\tpropBinding = binding.binding,\n\t\t\trootUuid = propBinding.rootNode.uuid,\n\t\t\ttrackName = propBinding.path,\n\t\t\tbindingsByRoot = this._bindingsByRootAndName,\n\t\t\tbindingByName = bindingsByRoot[ rootUuid ],\n\n\t\t\tlastInactiveBinding = bindings[ bindings.length - 1 ],\n\t\t\tcacheIndex = binding._cacheIndex;\n\n\t\tlastInactiveBinding._cacheIndex = cacheIndex;\n\t\tbindings[ cacheIndex ] = lastInactiveBinding;\n\t\tbindings.pop();\n\n\t\tdelete bindingByName[ trackName ];\n\n\t\tif ( Object.keys( bindingByName ).length === 0 ) {\n\n\t\t\tdelete bindingsByRoot[ rootUuid ];\n\n\t\t}\n\n\t},\n\n\t_lendBinding: function ( binding ) {\n\n\t\tconst bindings = this._bindings,\n\t\t\tprevIndex = binding._cacheIndex,\n\n\t\t\tlastActiveIndex = this._nActiveBindings ++,\n\n\t\t\tfirstInactiveBinding = bindings[ lastActiveIndex ];\n\n\t\tbinding._cacheIndex = lastActiveIndex;\n\t\tbindings[ lastActiveIndex ] = binding;\n\n\t\tfirstInactiveBinding._cacheIndex = prevIndex;\n\t\tbindings[ prevIndex ] = firstInactiveBinding;\n\n\t},\n\n\t_takeBackBinding: function ( binding ) {\n\n\t\tconst bindings = this._bindings,\n\t\t\tprevIndex = binding._cacheIndex,\n\n\t\t\tfirstInactiveIndex = -- this._nActiveBindings,\n\n\t\t\tlastActiveBinding = bindings[ firstInactiveIndex ];\n\n\t\tbinding._cacheIndex = firstInactiveIndex;\n\t\tbindings[ firstInactiveIndex ] = binding;\n\n\t\tlastActiveBinding._cacheIndex = prevIndex;\n\t\tbindings[ prevIndex ] = lastActiveBinding;\n\n\t},\n\n\n\t// Memory management of Interpolants for weight and time scale\n\n\t_lendControlInterpolant: function () {\n\n\t\tconst interpolants = this._controlInterpolants,\n\t\t\tlastActiveIndex = this._nActiveControlInterpolants ++;\n\n\t\tlet interpolant = interpolants[ lastActiveIndex ];\n\n\t\tif ( interpolant === undefined ) {\n\n\t\t\tinterpolant = new LinearInterpolant(\n\t\t\t\tnew Float32Array( 2 ), new Float32Array( 2 ),\n\t\t\t\t1, this._controlInterpolantsResultBuffer );\n\n\t\t\tinterpolant.__cacheIndex = lastActiveIndex;\n\t\t\tinterpolants[ lastActiveIndex ] = interpolant;\n\n\t\t}\n\n\t\treturn interpolant;\n\n\t},\n\n\t_takeBackControlInterpolant: function ( interpolant ) {\n\n\t\tconst interpolants = this._controlInterpolants,\n\t\t\tprevIndex = interpolant.__cacheIndex,\n\n\t\t\tfirstInactiveIndex = -- this._nActiveControlInterpolants,\n\n\t\t\tlastActiveInterpolant = interpolants[ firstInactiveIndex ];\n\n\t\tinterpolant.__cacheIndex = firstInactiveIndex;\n\t\tinterpolants[ firstInactiveIndex ] = interpolant;\n\n\t\tlastActiveInterpolant.__cacheIndex = prevIndex;\n\t\tinterpolants[ prevIndex ] = lastActiveInterpolant;\n\n\t},\n\n\t_controlInterpolantsResultBuffer: new Float32Array( 1 ),\n\n\t// return an action for a clip optionally using a custom root target\n\t// object (this method allocates a lot of dynamic memory in case a\n\t// previously unknown clip/root combination is specified)\n\tclipAction: function ( clip, optionalRoot, blendMode ) {\n\n\t\tconst root = optionalRoot || this._root,\n\t\t\trootUuid = root.uuid;\n\n\t\tlet clipObject = typeof clip === 'string' ? AnimationClip.findByName( root, clip ) : clip;\n\n\t\tconst clipUuid = clipObject !== null ? clipObject.uuid : clip;\n\n\t\tconst actionsForClip = this._actionsByClip[ clipUuid ];\n\t\tlet prototypeAction = null;\n\n\t\tif ( blendMode === undefined ) {\n\n\t\t\tif ( clipObject !== null ) {\n\n\t\t\t\tblendMode = clipObject.blendMode;\n\n\t\t\t} else {\n\n\t\t\t\tblendMode = NormalAnimationBlendMode;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( actionsForClip !== undefined ) {\n\n\t\t\tconst existingAction = actionsForClip.actionByRoot[ rootUuid ];\n\n\t\t\tif ( existingAction !== undefined && existingAction.blendMode === blendMode ) {\n\n\t\t\t\treturn existingAction;\n\n\t\t\t}\n\n\t\t\t// we know the clip, so we don't have to parse all\n\t\t\t// the bindings again but can just copy\n\t\t\tprototypeAction = actionsForClip.knownActions[ 0 ];\n\n\t\t\t// also, take the clip from the prototype action\n\t\t\tif ( clipObject === null )\n\t\t\t\tclipObject = prototypeAction._clip;\n\n\t\t}\n\n\t\t// clip must be known when specified via string\n\t\tif ( clipObject === null ) return null;\n\n\t\t// allocate all resources required to run it\n\t\tconst newAction = new AnimationAction( this, clipObject, optionalRoot, blendMode );\n\n\t\tthis._bindAction( newAction, prototypeAction );\n\n\t\t// and make the action known to the memory manager\n\t\tthis._addInactiveAction( newAction, clipUuid, rootUuid );\n\n\t\treturn newAction;\n\n\t},\n\n\t// get an existing action\n\texistingAction: function ( clip, optionalRoot ) {\n\n\t\tconst root = optionalRoot || this._root,\n\t\t\trootUuid = root.uuid,\n\n\t\t\tclipObject = typeof clip === 'string' ?\n\t\t\t\tAnimationClip.findByName( root, clip ) : clip,\n\n\t\t\tclipUuid = clipObject ? clipObject.uuid : clip,\n\n\t\t\tactionsForClip = this._actionsByClip[ clipUuid ];\n\n\t\tif ( actionsForClip !== undefined ) {\n\n\t\t\treturn actionsForClip.actionByRoot[ rootUuid ] || null;\n\n\t\t}\n\n\t\treturn null;\n\n\t},\n\n\t// deactivates all previously scheduled actions\n\tstopAllAction: function () {\n\n\t\tconst actions = this._actions,\n\t\t\tnActions = this._nActiveActions;\n\n\t\tfor ( let i = nActions - 1; i >= 0; -- i ) {\n\n\t\t\tactions[ i ].stop();\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\t// advance the time and update apply the animation\n\tupdate: function ( deltaTime ) {\n\n\t\tdeltaTime *= this.timeScale;\n\n\t\tconst actions = this._actions,\n\t\t\tnActions = this._nActiveActions,\n\n\t\t\ttime = this.time += deltaTime,\n\t\t\ttimeDirection = Math.sign( deltaTime ),\n\n\t\t\taccuIndex = this._accuIndex ^= 1;\n\n\t\t// run active actions\n\n\t\tfor ( let i = 0; i !== nActions; ++ i ) {\n\n\t\t\tconst action = actions[ i ];\n\n\t\t\taction._update( time, deltaTime, timeDirection, accuIndex );\n\n\t\t}\n\n\t\t// update scene graph\n\n\t\tconst bindings = this._bindings,\n\t\t\tnBindings = this._nActiveBindings;\n\n\t\tfor ( let i = 0; i !== nBindings; ++ i ) {\n\n\t\t\tbindings[ i ].apply( accuIndex );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\t// Allows you to seek to a specific time in an animation.\n\tsetTime: function ( timeInSeconds ) {\n\n\t\tthis.time = 0; // Zero out time attribute for AnimationMixer object;\n\t\tfor ( let i = 0; i < this._actions.length; i ++ ) {\n\n\t\t\tthis._actions[ i ].time = 0; // Zero out time attribute for all associated AnimationAction objects.\n\n\t\t}\n\n\t\treturn this.update( timeInSeconds ); // Update used to set exact time. Returns \"this\" AnimationMixer object.\n\n\t},\n\n\t// return this mixer's root target object\n\tgetRoot: function () {\n\n\t\treturn this._root;\n\n\t},\n\n\t// free all resources specific to a particular clip\n\tuncacheClip: function ( clip ) {\n\n\t\tconst actions = this._actions,\n\t\t\tclipUuid = clip.uuid,\n\t\t\tactionsByClip = this._actionsByClip,\n\t\t\tactionsForClip = actionsByClip[ clipUuid ];\n\n\t\tif ( actionsForClip !== undefined ) {\n\n\t\t\t// note: just calling _removeInactiveAction would mess up the\n\t\t\t// iteration state and also require updating the state we can\n\t\t\t// just throw away\n\n\t\t\tconst actionsToRemove = actionsForClip.knownActions;\n\n\t\t\tfor ( let i = 0, n = actionsToRemove.length; i !== n; ++ i ) {\n\n\t\t\t\tconst action = actionsToRemove[ i ];\n\n\t\t\t\tthis._deactivateAction( action );\n\n\t\t\t\tconst cacheIndex = action._cacheIndex,\n\t\t\t\t\tlastInactiveAction = actions[ actions.length - 1 ];\n\n\t\t\t\taction._cacheIndex = null;\n\t\t\t\taction._byClipCacheIndex = null;\n\n\t\t\t\tlastInactiveAction._cacheIndex = cacheIndex;\n\t\t\t\tactions[ cacheIndex ] = lastInactiveAction;\n\t\t\t\tactions.pop();\n\n\t\t\t\tthis._removeInactiveBindingsForAction( action );\n\n\t\t\t}\n\n\t\t\tdelete actionsByClip[ clipUuid ];\n\n\t\t}\n\n\t},\n\n\t// free all resources specific to a particular root target object\n\tuncacheRoot: function ( root ) {\n\n\t\tconst rootUuid = root.uuid,\n\t\t\tactionsByClip = this._actionsByClip;\n\n\t\tfor ( const clipUuid in actionsByClip ) {\n\n\t\t\tconst actionByRoot = actionsByClip[ clipUuid ].actionByRoot,\n\t\t\t\taction = actionByRoot[ rootUuid ];\n\n\t\t\tif ( action !== undefined ) {\n\n\t\t\t\tthis._deactivateAction( action );\n\t\t\t\tthis._removeInactiveAction( action );\n\n\t\t\t}\n\n\t\t}\n\n\t\tconst bindingsByRoot = this._bindingsByRootAndName,\n\t\t\tbindingByName = bindingsByRoot[ rootUuid ];\n\n\t\tif ( bindingByName !== undefined ) {\n\n\t\t\tfor ( const trackName in bindingByName ) {\n\n\t\t\t\tconst binding = bindingByName[ trackName ];\n\t\t\t\tbinding.restoreOriginalState();\n\t\t\t\tthis._removeInactiveBinding( binding );\n\n\t\t\t}\n\n\t\t}\n\n\t},\n\n\t// remove a targeted clip from the cache\n\tuncacheAction: function ( clip, optionalRoot ) {\n\n\t\tconst action = this.existingAction( clip, optionalRoot );\n\n\t\tif ( action !== null ) {\n\n\t\t\tthis._deactivateAction( action );\n\t\t\tthis._removeInactiveAction( action );\n\n\t\t}\n\n\t}\n\n} );\n\nclass Uniform {\n\n\tconstructor( value ) {\n\n\t\tif ( typeof value === 'string' ) {\n\n\t\t\tconsole.warn( 'THREE.Uniform: Type parameter is no longer needed.' );\n\t\t\tvalue = arguments[ 1 ];\n\n\t\t}\n\n\t\tthis.value = value;\n\n\t}\n\n\tclone() {\n\n\t\treturn new Uniform( this.value.clone === undefined ? this.value : this.value.clone() );\n\n\t}\n\n}\n\nfunction InstancedInterleavedBuffer( array, stride, meshPerAttribute ) {\n\n\tInterleavedBuffer.call( this, array, stride );\n\n\tthis.meshPerAttribute = meshPerAttribute || 1;\n\n}\n\nInstancedInterleavedBuffer.prototype = Object.assign( Object.create( InterleavedBuffer.prototype ), {\n\n\tconstructor: InstancedInterleavedBuffer,\n\n\tisInstancedInterleavedBuffer: true,\n\n\tcopy: function ( source ) {\n\n\t\tInterleavedBuffer.prototype.copy.call( this, source );\n\n\t\tthis.meshPerAttribute = source.meshPerAttribute;\n\n\t\treturn this;\n\n\t},\n\n\tclone: function ( data ) {\n\n\t\tconst ib = InterleavedBuffer.prototype.clone.call( this, data );\n\n\t\tib.meshPerAttribute = this.meshPerAttribute;\n\n\t\treturn ib;\n\n\t},\n\n\ttoJSON: function ( data ) {\n\n\t\tconst json = InterleavedBuffer.prototype.toJSON.call( this, data );\n\n\t\tjson.isInstancedInterleavedBuffer = true;\n\t\tjson.meshPerAttribute = this.meshPerAttribute;\n\n\t\treturn json;\n\n\t}\n\n} );\n\nfunction GLBufferAttribute( buffer, type, itemSize, elementSize, count ) {\n\n\tthis.buffer = buffer;\n\tthis.type = type;\n\tthis.itemSize = itemSize;\n\tthis.elementSize = elementSize;\n\tthis.count = count;\n\n\tthis.version = 0;\n\n}\n\nObject.defineProperty( GLBufferAttribute.prototype, 'needsUpdate', {\n\n\tset: function ( value ) {\n\n\t\tif ( value === true ) this.version ++;\n\n\t}\n\n} );\n\nObject.assign( GLBufferAttribute.prototype, {\n\n\tisGLBufferAttribute: true,\n\n\tsetBuffer: function ( buffer ) {\n\n\t\tthis.buffer = buffer;\n\n\t\treturn this;\n\n\t},\n\n\tsetType: function ( type, elementSize ) {\n\n\t\tthis.type = type;\n\t\tthis.elementSize = elementSize;\n\n\t\treturn this;\n\n\t},\n\n\tsetItemSize: function ( itemSize ) {\n\n\t\tthis.itemSize = itemSize;\n\n\t\treturn this;\n\n\t},\n\n\tsetCount: function ( count ) {\n\n\t\tthis.count = count;\n\n\t\treturn this;\n\n\t},\n\n} );\n\nfunction Raycaster( origin, direction, near, far ) {\n\n\tthis.ray = new Ray( origin, direction );\n\t// direction is assumed to be normalized (for accurate distance calculations)\n\n\tthis.near = near || 0;\n\tthis.far = far || Infinity;\n\tthis.camera = null;\n\tthis.layers = new Layers();\n\n\tthis.params = {\n\t\tMesh: {},\n\t\tLine: { threshold: 1 },\n\t\tLOD: {},\n\t\tPoints: { threshold: 1 },\n\t\tSprite: {}\n\t};\n\n\tObject.defineProperties( this.params, {\n\t\tPointCloud: {\n\t\t\tget: function () {\n\n\t\t\t\tconsole.warn( 'THREE.Raycaster: params.PointCloud has been renamed to params.Points.' );\n\t\t\t\treturn this.Points;\n\n\t\t\t}\n\t\t}\n\t} );\n\n}\n\nfunction ascSort( a, b ) {\n\n\treturn a.distance - b.distance;\n\n}\n\nfunction intersectObject( object, raycaster, intersects, recursive ) {\n\n\tif ( object.layers.test( raycaster.layers ) ) {\n\n\t\tobject.raycast( raycaster, intersects );\n\n\t}\n\n\tif ( recursive === true ) {\n\n\t\tconst children = object.children;\n\n\t\tfor ( let i = 0, l = children.length; i < l; i ++ ) {\n\n\t\t\tintersectObject( children[ i ], raycaster, intersects, true );\n\n\t\t}\n\n\t}\n\n}\n\nObject.assign( Raycaster.prototype, {\n\n\tset: function ( origin, direction ) {\n\n\t\t// direction is assumed to be normalized (for accurate distance calculations)\n\n\t\tthis.ray.set( origin, direction );\n\n\t},\n\n\tsetFromCamera: function ( coords, camera ) {\n\n\t\tif ( camera && camera.isPerspectiveCamera ) {\n\n\t\t\tthis.ray.origin.setFromMatrixPosition( camera.matrixWorld );\n\t\t\tthis.ray.direction.set( coords.x, coords.y, 0.5 ).unproject( camera ).sub( this.ray.origin ).normalize();\n\t\t\tthis.camera = camera;\n\n\t\t} else if ( camera && camera.isOrthographicCamera ) {\n\n\t\t\tthis.ray.origin.set( coords.x, coords.y, ( camera.near + camera.far ) / ( camera.near - camera.far ) ).unproject( camera ); // set origin in plane of camera\n\t\t\tthis.ray.direction.set( 0, 0, - 1 ).transformDirection( camera.matrixWorld );\n\t\t\tthis.camera = camera;\n\n\t\t} else {\n\n\t\t\tconsole.error( 'THREE.Raycaster: Unsupported camera type: ' + camera.type );\n\n\t\t}\n\n\t},\n\n\tintersectObject: function ( object, recursive, optionalTarget ) {\n\n\t\tconst intersects = optionalTarget || [];\n\n\t\tintersectObject( object, this, intersects, recursive );\n\n\t\tintersects.sort( ascSort );\n\n\t\treturn intersects;\n\n\t},\n\n\tintersectObjects: function ( objects, recursive, optionalTarget ) {\n\n\t\tconst intersects = optionalTarget || [];\n\n\t\tif ( Array.isArray( objects ) === false ) {\n\n\t\t\tconsole.warn( 'THREE.Raycaster.intersectObjects: objects is not an Array.' );\n\t\t\treturn intersects;\n\n\t\t}\n\n\t\tfor ( let i = 0, l = objects.length; i < l; i ++ ) {\n\n\t\t\tintersectObject( objects[ i ], this, intersects, recursive );\n\n\t\t}\n\n\t\tintersects.sort( ascSort );\n\n\t\treturn intersects;\n\n\t}\n\n} );\n\n/**\n * Ref: https://en.wikipedia.org/wiki/Spherical_coordinate_system\n *\n * The polar angle (phi) is measured from the positive y-axis. The positive y-axis is up.\n * The azimuthal angle (theta) is measured from the positive z-axis.\n */\n\nclass Spherical {\n\n\tconstructor( radius = 1, phi = 0, theta = 0 ) {\n\n\t\tthis.radius = radius;\n\t\tthis.phi = phi; // polar angle\n\t\tthis.theta = theta; // azimuthal angle\n\n\t\treturn this;\n\n\t}\n\n\tset( radius, phi, theta ) {\n\n\t\tthis.radius = radius;\n\t\tthis.phi = phi;\n\t\tthis.theta = theta;\n\n\t\treturn this;\n\n\t}\n\n\tclone() {\n\n\t\treturn new this.constructor().copy( this );\n\n\t}\n\n\tcopy( other ) {\n\n\t\tthis.radius = other.radius;\n\t\tthis.phi = other.phi;\n\t\tthis.theta = other.theta;\n\n\t\treturn this;\n\n\t}\n\n\t// restrict phi to be betwee EPS and PI-EPS\n\tmakeSafe() {\n\n\t\tconst EPS = 0.000001;\n\t\tthis.phi = Math.max( EPS, Math.min( Math.PI - EPS, this.phi ) );\n\n\t\treturn this;\n\n\t}\n\n\tsetFromVector3( v ) {\n\n\t\treturn this.setFromCartesianCoords( v.x, v.y, v.z );\n\n\t}\n\n\tsetFromCartesianCoords( x, y, z ) {\n\n\t\tthis.radius = Math.sqrt( x * x + y * y + z * z );\n\n\t\tif ( this.radius === 0 ) {\n\n\t\t\tthis.theta = 0;\n\t\t\tthis.phi = 0;\n\n\t\t} else {\n\n\t\t\tthis.theta = Math.atan2( x, z );\n\t\t\tthis.phi = Math.acos( MathUtils.clamp( y / this.radius, - 1, 1 ) );\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n}\n\n/**\n * Ref: https://en.wikipedia.org/wiki/Cylindrical_coordinate_system\n */\n\nclass Cylindrical {\n\n\tconstructor( radius, theta, y ) {\n\n\t\tthis.radius = ( radius !== undefined ) ? radius : 1.0; // distance from the origin to a point in the x-z plane\n\t\tthis.theta = ( theta !== undefined ) ? theta : 0; // counterclockwise angle in the x-z plane measured in radians from the positive z-axis\n\t\tthis.y = ( y !== undefined ) ? y : 0; // height above the x-z plane\n\n\t\treturn this;\n\n\t}\n\n\tset( radius, theta, y ) {\n\n\t\tthis.radius = radius;\n\t\tthis.theta = theta;\n\t\tthis.y = y;\n\n\t\treturn this;\n\n\t}\n\n\tclone() {\n\n\t\treturn new this.constructor().copy( this );\n\n\t}\n\n\tcopy( other ) {\n\n\t\tthis.radius = other.radius;\n\t\tthis.theta = other.theta;\n\t\tthis.y = other.y;\n\n\t\treturn this;\n\n\t}\n\n\tsetFromVector3( v ) {\n\n\t\treturn this.setFromCartesianCoords( v.x, v.y, v.z );\n\n\t}\n\n\tsetFromCartesianCoords( x, y, z ) {\n\n\t\tthis.radius = Math.sqrt( x * x + z * z );\n\t\tthis.theta = Math.atan2( x, z );\n\t\tthis.y = y;\n\n\t\treturn this;\n\n\t}\n\n}\n\nconst _vector$8 = /*@__PURE__*/ new Vector2();\n\nclass Box2 {\n\n\tconstructor( min, max ) {\n\n\t\tObject.defineProperty( this, 'isBox2', { value: true } );\n\n\t\tthis.min = ( min !== undefined ) ? min : new Vector2( + Infinity, + Infinity );\n\t\tthis.max = ( max !== undefined ) ? max : new Vector2( - Infinity, - Infinity );\n\n\t}\n\n\tset( min, max ) {\n\n\t\tthis.min.copy( min );\n\t\tthis.max.copy( max );\n\n\t\treturn this;\n\n\t}\n\n\tsetFromPoints( points ) {\n\n\t\tthis.makeEmpty();\n\n\t\tfor ( let i = 0, il = points.length; i < il; i ++ ) {\n\n\t\t\tthis.expandByPoint( points[ i ] );\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n\tsetFromCenterAndSize( center, size ) {\n\n\t\tconst halfSize = _vector$8.copy( size ).multiplyScalar( 0.5 );\n\t\tthis.min.copy( center ).sub( halfSize );\n\t\tthis.max.copy( center ).add( halfSize );\n\n\t\treturn this;\n\n\t}\n\n\tclone() {\n\n\t\treturn new this.constructor().copy( this );\n\n\t}\n\n\tcopy( box ) {\n\n\t\tthis.min.copy( box.min );\n\t\tthis.max.copy( box.max );\n\n\t\treturn this;\n\n\t}\n\n\tmakeEmpty() {\n\n\t\tthis.min.x = this.min.y = + Infinity;\n\t\tthis.max.x = this.max.y = - Infinity;\n\n\t\treturn this;\n\n\t}\n\n\tisEmpty() {\n\n\t\t// this is a more robust check for empty than ( volume <= 0 ) because volume can get positive with two negative axes\n\n\t\treturn ( this.max.x < this.min.x ) || ( this.max.y < this.min.y );\n\n\t}\n\n\tgetCenter( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Box2: .getCenter() target is now required' );\n\t\t\ttarget = new Vector2();\n\n\t\t}\n\n\t\treturn this.isEmpty() ? target.set( 0, 0 ) : target.addVectors( this.min, this.max ).multiplyScalar( 0.5 );\n\n\t}\n\n\tgetSize( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Box2: .getSize() target is now required' );\n\t\t\ttarget = new Vector2();\n\n\t\t}\n\n\t\treturn this.isEmpty() ? target.set( 0, 0 ) : target.subVectors( this.max, this.min );\n\n\t}\n\n\texpandByPoint( point ) {\n\n\t\tthis.min.min( point );\n\t\tthis.max.max( point );\n\n\t\treturn this;\n\n\t}\n\n\texpandByVector( vector ) {\n\n\t\tthis.min.sub( vector );\n\t\tthis.max.add( vector );\n\n\t\treturn this;\n\n\t}\n\n\texpandByScalar( scalar ) {\n\n\t\tthis.min.addScalar( - scalar );\n\t\tthis.max.addScalar( scalar );\n\n\t\treturn this;\n\n\t}\n\n\tcontainsPoint( point ) {\n\n\t\treturn point.x < this.min.x || point.x > this.max.x ||\n\t\t\tpoint.y < this.min.y || point.y > this.max.y ? false : true;\n\n\t}\n\n\tcontainsBox( box ) {\n\n\t\treturn this.min.x <= box.min.x && box.max.x <= this.max.x &&\n\t\t\tthis.min.y <= box.min.y && box.max.y <= this.max.y;\n\n\t}\n\n\tgetParameter( point, target ) {\n\n\t\t// This can potentially have a divide by zero if the box\n\t\t// has a size dimension of 0.\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Box2: .getParameter() target is now required' );\n\t\t\ttarget = new Vector2();\n\n\t\t}\n\n\t\treturn target.set(\n\t\t\t( point.x - this.min.x ) / ( this.max.x - this.min.x ),\n\t\t\t( point.y - this.min.y ) / ( this.max.y - this.min.y )\n\t\t);\n\n\t}\n\n\tintersectsBox( box ) {\n\n\t\t// using 4 splitting planes to rule out intersections\n\n\t\treturn box.max.x < this.min.x || box.min.x > this.max.x ||\n\t\t\tbox.max.y < this.min.y || box.min.y > this.max.y ? false : true;\n\n\t}\n\n\tclampPoint( point, target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Box2: .clampPoint() target is now required' );\n\t\t\ttarget = new Vector2();\n\n\t\t}\n\n\t\treturn target.copy( point ).clamp( this.min, this.max );\n\n\t}\n\n\tdistanceToPoint( point ) {\n\n\t\tconst clampedPoint = _vector$8.copy( point ).clamp( this.min, this.max );\n\t\treturn clampedPoint.sub( point ).length();\n\n\t}\n\n\tintersect( box ) {\n\n\t\tthis.min.max( box.min );\n\t\tthis.max.min( box.max );\n\n\t\treturn this;\n\n\t}\n\n\tunion( box ) {\n\n\t\tthis.min.min( box.min );\n\t\tthis.max.max( box.max );\n\n\t\treturn this;\n\n\t}\n\n\ttranslate( offset ) {\n\n\t\tthis.min.add( offset );\n\t\tthis.max.add( offset );\n\n\t\treturn this;\n\n\t}\n\n\tequals( box ) {\n\n\t\treturn box.min.equals( this.min ) && box.max.equals( this.max );\n\n\t}\n\n}\n\nconst _startP = /*@__PURE__*/ new Vector3();\nconst _startEnd = /*@__PURE__*/ new Vector3();\n\nclass Line3 {\n\n\tconstructor( start, end ) {\n\n\t\tthis.start = ( start !== undefined ) ? start : new Vector3();\n\t\tthis.end = ( end !== undefined ) ? end : new Vector3();\n\n\t}\n\n\tset( start, end ) {\n\n\t\tthis.start.copy( start );\n\t\tthis.end.copy( end );\n\n\t\treturn this;\n\n\t}\n\n\tclone() {\n\n\t\treturn new this.constructor().copy( this );\n\n\t}\n\n\tcopy( line ) {\n\n\t\tthis.start.copy( line.start );\n\t\tthis.end.copy( line.end );\n\n\t\treturn this;\n\n\t}\n\n\tgetCenter( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Line3: .getCenter() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\treturn target.addVectors( this.start, this.end ).multiplyScalar( 0.5 );\n\n\t}\n\n\tdelta( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Line3: .delta() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\treturn target.subVectors( this.end, this.start );\n\n\t}\n\n\tdistanceSq() {\n\n\t\treturn this.start.distanceToSquared( this.end );\n\n\t}\n\n\tdistance() {\n\n\t\treturn this.start.distanceTo( this.end );\n\n\t}\n\n\tat( t, target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Line3: .at() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\treturn this.delta( target ).multiplyScalar( t ).add( this.start );\n\n\t}\n\n\tclosestPointToPointParameter( point, clampToLine ) {\n\n\t\t_startP.subVectors( point, this.start );\n\t\t_startEnd.subVectors( this.end, this.start );\n\n\t\tconst startEnd2 = _startEnd.dot( _startEnd );\n\t\tconst startEnd_startP = _startEnd.dot( _startP );\n\n\t\tlet t = startEnd_startP / startEnd2;\n\n\t\tif ( clampToLine ) {\n\n\t\t\tt = MathUtils.clamp( t, 0, 1 );\n\n\t\t}\n\n\t\treturn t;\n\n\t}\n\n\tclosestPointToPoint( point, clampToLine, target ) {\n\n\t\tconst t = this.closestPointToPointParameter( point, clampToLine );\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Line3: .closestPointToPoint() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\treturn this.delta( target ).multiplyScalar( t ).add( this.start );\n\n\t}\n\n\tapplyMatrix4( matrix ) {\n\n\t\tthis.start.applyMatrix4( matrix );\n\t\tthis.end.applyMatrix4( matrix );\n\n\t\treturn this;\n\n\t}\n\n\tequals( line ) {\n\n\t\treturn line.start.equals( this.start ) && line.end.equals( this.end );\n\n\t}\n\n}\n\nfunction ImmediateRenderObject( material ) {\n\n\tObject3D.call( this );\n\n\tthis.material = material;\n\tthis.render = function ( /* renderCallback */ ) {};\n\n\tthis.hasPositions = false;\n\tthis.hasNormals = false;\n\tthis.hasColors = false;\n\tthis.hasUvs = false;\n\n\tthis.positionArray = null;\n\tthis.normalArray = null;\n\tthis.colorArray = null;\n\tthis.uvArray = null;\n\n\tthis.count = 0;\n\n}\n\nImmediateRenderObject.prototype = Object.create( Object3D.prototype );\nImmediateRenderObject.prototype.constructor = ImmediateRenderObject;\n\nImmediateRenderObject.prototype.isImmediateRenderObject = true;\n\nconst _vector$9 = /*@__PURE__*/ new Vector3();\n\nclass SpotLightHelper extends Object3D {\n\n\tconstructor( light, color ) {\n\n\t\tsuper();\n\t\tthis.light = light;\n\t\tthis.light.updateMatrixWorld();\n\n\t\tthis.matrix = light.matrixWorld;\n\t\tthis.matrixAutoUpdate = false;\n\n\t\tthis.color = color;\n\n\t\tconst geometry = new BufferGeometry();\n\n\t\tconst positions = [\n\t\t\t0, 0, 0, \t0, 0, 1,\n\t\t\t0, 0, 0, \t1, 0, 1,\n\t\t\t0, 0, 0,\t- 1, 0, 1,\n\t\t\t0, 0, 0, \t0, 1, 1,\n\t\t\t0, 0, 0, \t0, - 1, 1\n\t\t];\n\n\t\tfor ( let i = 0, j = 1, l = 32; i < l; i ++, j ++ ) {\n\n\t\t\tconst p1 = ( i / l ) * Math.PI * 2;\n\t\t\tconst p2 = ( j / l ) * Math.PI * 2;\n\n\t\t\tpositions.push(\n\t\t\t\tMath.cos( p1 ), Math.sin( p1 ), 1,\n\t\t\t\tMath.cos( p2 ), Math.sin( p2 ), 1\n\t\t\t);\n\n\t\t}\n\n\t\tgeometry.setAttribute( 'position', new Float32BufferAttribute( positions, 3 ) );\n\n\t\tconst material = new LineBasicMaterial( { fog: false, toneMapped: false } );\n\n\t\tthis.cone = new LineSegments( geometry, material );\n\t\tthis.add( this.cone );\n\n\t\tthis.update();\n\n\t}\n\n\tdispose() {\n\n\t\tthis.cone.geometry.dispose();\n\t\tthis.cone.material.dispose();\n\n\t}\n\n\tupdate() {\n\n\t\tthis.light.updateMatrixWorld();\n\n\t\tconst coneLength = this.light.distance ? this.light.distance : 1000;\n\t\tconst coneWidth = coneLength * Math.tan( this.light.angle );\n\n\t\tthis.cone.scale.set( coneWidth, coneWidth, coneLength );\n\n\t\t_vector$9.setFromMatrixPosition( this.light.target.matrixWorld );\n\n\t\tthis.cone.lookAt( _vector$9 );\n\n\t\tif ( this.color !== undefined ) {\n\n\t\t\tthis.cone.material.color.set( this.color );\n\n\t\t} else {\n\n\t\t\tthis.cone.material.color.copy( this.light.color );\n\n\t\t}\n\n\t}\n\n}\n\nconst _vector$a = /*@__PURE__*/ new Vector3();\nconst _boneMatrix = /*@__PURE__*/ new Matrix4();\nconst _matrixWorldInv = /*@__PURE__*/ new Matrix4();\n\n\nclass SkeletonHelper extends LineSegments {\n\n\tconstructor( object ) {\n\n\t\tconst bones = getBoneList( object );\n\n\t\tconst geometry = new BufferGeometry();\n\n\t\tconst vertices = [];\n\t\tconst colors = [];\n\n\t\tconst color1 = new Color( 0, 0, 1 );\n\t\tconst color2 = new Color( 0, 1, 0 );\n\n\t\tfor ( let i = 0; i < bones.length; i ++ ) {\n\n\t\t\tconst bone = bones[ i ];\n\n\t\t\tif ( bone.parent && bone.parent.isBone ) {\n\n\t\t\t\tvertices.push( 0, 0, 0 );\n\t\t\t\tvertices.push( 0, 0, 0 );\n\t\t\t\tcolors.push( color1.r, color1.g, color1.b );\n\t\t\t\tcolors.push( color2.r, color2.g, color2.b );\n\n\t\t\t}\n\n\t\t}\n\n\t\tgeometry.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\t\tgeometry.setAttribute( 'color', new Float32BufferAttribute( colors, 3 ) );\n\n\t\tconst material = new LineBasicMaterial( { vertexColors: true, depthTest: false, depthWrite: false, toneMapped: false, transparent: true } );\n\n\t\tsuper( geometry, material );\n\n\t\tthis.type = 'SkeletonHelper';\n\t\tthis.isSkeletonHelper = true;\n\n\t\tthis.root = object;\n\t\tthis.bones = bones;\n\n\t\tthis.matrix = object.matrixWorld;\n\t\tthis.matrixAutoUpdate = false;\n\n\t}\n\n\tupdateMatrixWorld( force ) {\n\n\t\tconst bones = this.bones;\n\n\t\tconst geometry = this.geometry;\n\t\tconst position = geometry.getAttribute( 'position' );\n\n\t\t_matrixWorldInv.copy( this.root.matrixWorld ).invert();\n\n\t\tfor ( let i = 0, j = 0; i < bones.length; i ++ ) {\n\n\t\t\tconst bone = bones[ i ];\n\n\t\t\tif ( bone.parent && bone.parent.isBone ) {\n\n\t\t\t\t_boneMatrix.multiplyMatrices( _matrixWorldInv, bone.matrixWorld );\n\t\t\t\t_vector$a.setFromMatrixPosition( _boneMatrix );\n\t\t\t\tposition.setXYZ( j, _vector$a.x, _vector$a.y, _vector$a.z );\n\n\t\t\t\t_boneMatrix.multiplyMatrices( _matrixWorldInv, bone.parent.matrixWorld );\n\t\t\t\t_vector$a.setFromMatrixPosition( _boneMatrix );\n\t\t\t\tposition.setXYZ( j + 1, _vector$a.x, _vector$a.y, _vector$a.z );\n\n\t\t\t\tj += 2;\n\n\t\t\t}\n\n\t\t}\n\n\t\tgeometry.getAttribute( 'position' ).needsUpdate = true;\n\n\t\tsuper.updateMatrixWorld( force );\n\n\t}\n\n}\n\n\nfunction getBoneList( object ) {\n\n\tconst boneList = [];\n\n\tif ( object && object.isBone ) {\n\n\t\tboneList.push( object );\n\n\t}\n\n\tfor ( let i = 0; i < object.children.length; i ++ ) {\n\n\t\tboneList.push.apply( boneList, getBoneList( object.children[ i ] ) );\n\n\t}\n\n\treturn boneList;\n\n}\n\nclass PointLightHelper extends Mesh {\n\n\tconstructor( light, sphereSize, color ) {\n\n\t\tconst geometry = new SphereGeometry( sphereSize, 4, 2 );\n\t\tconst material = new MeshBasicMaterial( { wireframe: true, fog: false, toneMapped: false } );\n\n\t\tsuper( geometry, material );\n\n\t\tthis.light = light;\n\t\tthis.light.updateMatrixWorld();\n\n\t\tthis.color = color;\n\n\t\tthis.type = 'PointLightHelper';\n\n\t\tthis.matrix = this.light.matrixWorld;\n\t\tthis.matrixAutoUpdate = false;\n\n\t\tthis.update();\n\n\n\t\t/*\n\t// TODO: delete this comment?\n\tconst distanceGeometry = new THREE.IcosahedronBufferGeometry( 1, 2 );\n\tconst distanceMaterial = new THREE.MeshBasicMaterial( { color: hexColor, fog: false, wireframe: true, opacity: 0.1, transparent: true } );\n\n\tthis.lightSphere = new THREE.Mesh( bulbGeometry, bulbMaterial );\n\tthis.lightDistance = new THREE.Mesh( distanceGeometry, distanceMaterial );\n\n\tconst d = light.distance;\n\n\tif ( d === 0.0 ) {\n\n\t\tthis.lightDistance.visible = false;\n\n\t} else {\n\n\t\tthis.lightDistance.scale.set( d, d, d );\n\n\t}\n\n\tthis.add( this.lightDistance );\n\t*/\n\n\t}\n\n\tdispose() {\n\n\t\tthis.geometry.dispose();\n\t\tthis.material.dispose();\n\n\t}\n\n\tupdate() {\n\n\t\tif ( this.color !== undefined ) {\n\n\t\t\tthis.material.color.set( this.color );\n\n\t\t} else {\n\n\t\t\tthis.material.color.copy( this.light.color );\n\n\t\t}\n\n\t\t/*\n\t\tconst d = this.light.distance;\n\n\t\tif ( d === 0.0 ) {\n\n\t\t\tthis.lightDistance.visible = false;\n\n\t\t} else {\n\n\t\t\tthis.lightDistance.visible = true;\n\t\t\tthis.lightDistance.scale.set( d, d, d );\n\n\t\t}\n\t\t*/\n\n\t}\n\n}\n\nconst _vector$b = /*@__PURE__*/ new Vector3();\nconst _color1 = /*@__PURE__*/ new Color();\nconst _color2 = /*@__PURE__*/ new Color();\n\nclass HemisphereLightHelper extends Object3D {\n\n\tconstructor( light, size, color ) {\n\n\t\tsuper();\n\t\tthis.light = light;\n\t\tthis.light.updateMatrixWorld();\n\n\t\tthis.matrix = light.matrixWorld;\n\t\tthis.matrixAutoUpdate = false;\n\n\t\tthis.color = color;\n\n\t\tconst geometry = new OctahedronGeometry( size );\n\t\tgeometry.rotateY( Math.PI * 0.5 );\n\n\t\tthis.material = new MeshBasicMaterial( { wireframe: true, fog: false, toneMapped: false } );\n\t\tif ( this.color === undefined ) this.material.vertexColors = true;\n\n\t\tconst position = geometry.getAttribute( 'position' );\n\t\tconst colors = new Float32Array( position.count * 3 );\n\n\t\tgeometry.setAttribute( 'color', new BufferAttribute( colors, 3 ) );\n\n\t\tthis.add( new Mesh( geometry, this.material ) );\n\n\t\tthis.update();\n\n\t}\n\n\tdispose() {\n\n\t\tthis.children[ 0 ].geometry.dispose();\n\t\tthis.children[ 0 ].material.dispose();\n\n\t}\n\n\tupdate() {\n\n\t\tconst mesh = this.children[ 0 ];\n\n\t\tif ( this.color !== undefined ) {\n\n\t\t\tthis.material.color.set( this.color );\n\n\t\t} else {\n\n\t\t\tconst colors = mesh.geometry.getAttribute( 'color' );\n\n\t\t\t_color1.copy( this.light.color );\n\t\t\t_color2.copy( this.light.groundColor );\n\n\t\t\tfor ( let i = 0, l = colors.count; i < l; i ++ ) {\n\n\t\t\t\tconst color = ( i < ( l / 2 ) ) ? _color1 : _color2;\n\n\t\t\t\tcolors.setXYZ( i, color.r, color.g, color.b );\n\n\t\t\t}\n\n\t\t\tcolors.needsUpdate = true;\n\n\t\t}\n\n\t\tmesh.lookAt( _vector$b.setFromMatrixPosition( this.light.matrixWorld ).negate() );\n\n\t}\n\n}\n\nclass GridHelper extends LineSegments {\n\n\tconstructor( size = 10, divisions = 10, color1 = 0x444444, color2 = 0x888888 ) {\n\n\t\tcolor1 = new Color( color1 );\n\t\tcolor2 = new Color( color2 );\n\n\t\tconst center = divisions / 2;\n\t\tconst step = size / divisions;\n\t\tconst halfSize = size / 2;\n\n\t\tconst vertices = [], colors = [];\n\n\t\tfor ( let i = 0, j = 0, k = - halfSize; i <= divisions; i ++, k += step ) {\n\n\t\t\tvertices.push( - halfSize, 0, k, halfSize, 0, k );\n\t\t\tvertices.push( k, 0, - halfSize, k, 0, halfSize );\n\n\t\t\tconst color = i === center ? color1 : color2;\n\n\t\t\tcolor.toArray( colors, j ); j += 3;\n\t\t\tcolor.toArray( colors, j ); j += 3;\n\t\t\tcolor.toArray( colors, j ); j += 3;\n\t\t\tcolor.toArray( colors, j ); j += 3;\n\n\t\t}\n\n\t\tconst geometry = new BufferGeometry();\n\t\tgeometry.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\t\tgeometry.setAttribute( 'color', new Float32BufferAttribute( colors, 3 ) );\n\n\t\tconst material = new LineBasicMaterial( { vertexColors: true, toneMapped: false } );\n\n\t\tsuper( geometry, material );\n\n\t\tthis.type = 'GridHelper';\n\n\t}\n\n}\n\nclass PolarGridHelper extends LineSegments {\n\n\tconstructor( radius = 10, radials = 16, circles = 8, divisions = 64, color1 = 0x444444, color2 = 0x888888 ) {\n\n\t\tcolor1 = new Color( color1 );\n\t\tcolor2 = new Color( color2 );\n\n\t\tconst vertices = [];\n\t\tconst colors = [];\n\n\t\t// create the radials\n\n\t\tfor ( let i = 0; i <= radials; i ++ ) {\n\n\t\t\tconst v = ( i / radials ) * ( Math.PI * 2 );\n\n\t\t\tconst x = Math.sin( v ) * radius;\n\t\t\tconst z = Math.cos( v ) * radius;\n\n\t\t\tvertices.push( 0, 0, 0 );\n\t\t\tvertices.push( x, 0, z );\n\n\t\t\tconst color = ( i & 1 ) ? color1 : color2;\n\n\t\t\tcolors.push( color.r, color.g, color.b );\n\t\t\tcolors.push( color.r, color.g, color.b );\n\n\t\t}\n\n\t\t// create the circles\n\n\t\tfor ( let i = 0; i <= circles; i ++ ) {\n\n\t\t\tconst color = ( i & 1 ) ? color1 : color2;\n\n\t\t\tconst r = radius - ( radius / circles * i );\n\n\t\t\tfor ( let j = 0; j < divisions; j ++ ) {\n\n\t\t\t\t// first vertex\n\n\t\t\t\tlet v = ( j / divisions ) * ( Math.PI * 2 );\n\n\t\t\t\tlet x = Math.sin( v ) * r;\n\t\t\t\tlet z = Math.cos( v ) * r;\n\n\t\t\t\tvertices.push( x, 0, z );\n\t\t\t\tcolors.push( color.r, color.g, color.b );\n\n\t\t\t\t// second vertex\n\n\t\t\t\tv = ( ( j + 1 ) / divisions ) * ( Math.PI * 2 );\n\n\t\t\t\tx = Math.sin( v ) * r;\n\t\t\t\tz = Math.cos( v ) * r;\n\n\t\t\t\tvertices.push( x, 0, z );\n\t\t\t\tcolors.push( color.r, color.g, color.b );\n\n\t\t\t}\n\n\t\t}\n\n\t\tconst geometry = new BufferGeometry();\n\t\tgeometry.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\t\tgeometry.setAttribute( 'color', new Float32BufferAttribute( colors, 3 ) );\n\n\t\tconst material = new LineBasicMaterial( { vertexColors: true, toneMapped: false } );\n\n\t\tsuper( geometry, material );\n\n\t\tthis.type = 'PolarGridHelper';\n\n\t}\n\n}\n\nconst _v1$6 = /*@__PURE__*/ new Vector3();\nconst _v2$3 = /*@__PURE__*/ new Vector3();\nconst _v3$1 = /*@__PURE__*/ new Vector3();\n\nclass DirectionalLightHelper extends Object3D {\n\n\tconstructor( light, size, color ) {\n\n\t\tsuper();\n\t\tthis.light = light;\n\t\tthis.light.updateMatrixWorld();\n\n\t\tthis.matrix = light.matrixWorld;\n\t\tthis.matrixAutoUpdate = false;\n\n\t\tthis.color = color;\n\n\t\tif ( size === undefined ) size = 1;\n\n\t\tlet geometry = new BufferGeometry();\n\t\tgeometry.setAttribute( 'position', new Float32BufferAttribute( [\n\t\t\t- size, size, 0,\n\t\t\tsize, size, 0,\n\t\t\tsize, - size, 0,\n\t\t\t- size, - size, 0,\n\t\t\t- size, size, 0\n\t\t], 3 ) );\n\n\t\tconst material = new LineBasicMaterial( { fog: false, toneMapped: false } );\n\n\t\tthis.lightPlane = new Line( geometry, material );\n\t\tthis.add( this.lightPlane );\n\n\t\tgeometry = new BufferGeometry();\n\t\tgeometry.setAttribute( 'position', new Float32BufferAttribute( [ 0, 0, 0, 0, 0, 1 ], 3 ) );\n\n\t\tthis.targetLine = new Line( geometry, material );\n\t\tthis.add( this.targetLine );\n\n\t\tthis.update();\n\n\t}\n\n\tdispose() {\n\n\t\tthis.lightPlane.geometry.dispose();\n\t\tthis.lightPlane.material.dispose();\n\t\tthis.targetLine.geometry.dispose();\n\t\tthis.targetLine.material.dispose();\n\n\t}\n\n\tupdate() {\n\n\t\t_v1$6.setFromMatrixPosition( this.light.matrixWorld );\n\t\t_v2$3.setFromMatrixPosition( this.light.target.matrixWorld );\n\t\t_v3$1.subVectors( _v2$3, _v1$6 );\n\n\t\tthis.lightPlane.lookAt( _v2$3 );\n\n\t\tif ( this.color !== undefined ) {\n\n\t\t\tthis.lightPlane.material.color.set( this.color );\n\t\t\tthis.targetLine.material.color.set( this.color );\n\n\t\t} else {\n\n\t\t\tthis.lightPlane.material.color.copy( this.light.color );\n\t\t\tthis.targetLine.material.color.copy( this.light.color );\n\n\t\t}\n\n\t\tthis.targetLine.lookAt( _v2$3 );\n\t\tthis.targetLine.scale.z = _v3$1.length();\n\n\t}\n\n}\n\nconst _vector$c = /*@__PURE__*/ new Vector3();\nconst _camera = /*@__PURE__*/ new Camera();\n\n/**\n *\t- shows frustum, line of sight and up of the camera\n *\t- suitable for fast updates\n * \t- based on frustum visualization in lightgl.js shadowmap example\n *\t\thttp://evanw.github.com/lightgl.js/tests/shadowmap.html\n */\n\nclass CameraHelper extends LineSegments {\n\n\tconstructor( camera ) {\n\n\t\tconst geometry = new BufferGeometry();\n\t\tconst material = new LineBasicMaterial( { color: 0xffffff, vertexColors: true, toneMapped: false } );\n\n\t\tconst vertices = [];\n\t\tconst colors = [];\n\n\t\tconst pointMap = {};\n\n\t\t// colors\n\n\t\tconst colorFrustum = new Color( 0xffaa00 );\n\t\tconst colorCone = new Color( 0xff0000 );\n\t\tconst colorUp = new Color( 0x00aaff );\n\t\tconst colorTarget = new Color( 0xffffff );\n\t\tconst colorCross = new Color( 0x333333 );\n\n\t\t// near\n\n\t\taddLine( 'n1', 'n2', colorFrustum );\n\t\taddLine( 'n2', 'n4', colorFrustum );\n\t\taddLine( 'n4', 'n3', colorFrustum );\n\t\taddLine( 'n3', 'n1', colorFrustum );\n\n\t\t// far\n\n\t\taddLine( 'f1', 'f2', colorFrustum );\n\t\taddLine( 'f2', 'f4', colorFrustum );\n\t\taddLine( 'f4', 'f3', colorFrustum );\n\t\taddLine( 'f3', 'f1', colorFrustum );\n\n\t\t// sides\n\n\t\taddLine( 'n1', 'f1', colorFrustum );\n\t\taddLine( 'n2', 'f2', colorFrustum );\n\t\taddLine( 'n3', 'f3', colorFrustum );\n\t\taddLine( 'n4', 'f4', colorFrustum );\n\n\t\t// cone\n\n\t\taddLine( 'p', 'n1', colorCone );\n\t\taddLine( 'p', 'n2', colorCone );\n\t\taddLine( 'p', 'n3', colorCone );\n\t\taddLine( 'p', 'n4', colorCone );\n\n\t\t// up\n\n\t\taddLine( 'u1', 'u2', colorUp );\n\t\taddLine( 'u2', 'u3', colorUp );\n\t\taddLine( 'u3', 'u1', colorUp );\n\n\t\t// target\n\n\t\taddLine( 'c', 't', colorTarget );\n\t\taddLine( 'p', 'c', colorCross );\n\n\t\t// cross\n\n\t\taddLine( 'cn1', 'cn2', colorCross );\n\t\taddLine( 'cn3', 'cn4', colorCross );\n\n\t\taddLine( 'cf1', 'cf2', colorCross );\n\t\taddLine( 'cf3', 'cf4', colorCross );\n\n\t\tfunction addLine( a, b, color ) {\n\n\t\t\taddPoint( a, color );\n\t\t\taddPoint( b, color );\n\n\t\t}\n\n\t\tfunction addPoint( id, color ) {\n\n\t\t\tvertices.push( 0, 0, 0 );\n\t\t\tcolors.push( color.r, color.g, color.b );\n\n\t\t\tif ( pointMap[ id ] === undefined ) {\n\n\t\t\t\tpointMap[ id ] = [];\n\n\t\t\t}\n\n\t\t\tpointMap[ id ].push( ( vertices.length / 3 ) - 1 );\n\n\t\t}\n\n\t\tgeometry.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\t\tgeometry.setAttribute( 'color', new Float32BufferAttribute( colors, 3 ) );\n\n\t\tsuper( geometry, material );\n\n\t\tthis.type = 'CameraHelper';\n\n\t\tthis.camera = camera;\n\t\tif ( this.camera.updateProjectionMatrix ) this.camera.updateProjectionMatrix();\n\n\t\tthis.matrix = camera.matrixWorld;\n\t\tthis.matrixAutoUpdate = false;\n\n\t\tthis.pointMap = pointMap;\n\n\t\tthis.update();\n\n\t}\n\n\tupdate() {\n\n\t\tconst geometry = this.geometry;\n\t\tconst pointMap = this.pointMap;\n\n\t\tconst w = 1, h = 1;\n\n\t\t// we need just camera projection matrix inverse\n\t\t// world matrix must be identity\n\n\t\t_camera.projectionMatrixInverse.copy( this.camera.projectionMatrixInverse );\n\n\t\t// center / target\n\n\t\tsetPoint( 'c', pointMap, geometry, _camera, 0, 0, - 1 );\n\t\tsetPoint( 't', pointMap, geometry, _camera, 0, 0, 1 );\n\n\t\t// near\n\n\t\tsetPoint( 'n1', pointMap, geometry, _camera, - w, - h, - 1 );\n\t\tsetPoint( 'n2', pointMap, geometry, _camera, w, - h, - 1 );\n\t\tsetPoint( 'n3', pointMap, geometry, _camera, - w, h, - 1 );\n\t\tsetPoint( 'n4', pointMap, geometry, _camera, w, h, - 1 );\n\n\t\t// far\n\n\t\tsetPoint( 'f1', pointMap, geometry, _camera, - w, - h, 1 );\n\t\tsetPoint( 'f2', pointMap, geometry, _camera, w, - h, 1 );\n\t\tsetPoint( 'f3', pointMap, geometry, _camera, - w, h, 1 );\n\t\tsetPoint( 'f4', pointMap, geometry, _camera, w, h, 1 );\n\n\t\t// up\n\n\t\tsetPoint( 'u1', pointMap, geometry, _camera, w * 0.7, h * 1.1, - 1 );\n\t\tsetPoint( 'u2', pointMap, geometry, _camera, - w * 0.7, h * 1.1, - 1 );\n\t\tsetPoint( 'u3', pointMap, geometry, _camera, 0, h * 2, - 1 );\n\n\t\t// cross\n\n\t\tsetPoint( 'cf1', pointMap, geometry, _camera, - w, 0, 1 );\n\t\tsetPoint( 'cf2', pointMap, geometry, _camera, w, 0, 1 );\n\t\tsetPoint( 'cf3', pointMap, geometry, _camera, 0, - h, 1 );\n\t\tsetPoint( 'cf4', pointMap, geometry, _camera, 0, h, 1 );\n\n\t\tsetPoint( 'cn1', pointMap, geometry, _camera, - w, 0, - 1 );\n\t\tsetPoint( 'cn2', pointMap, geometry, _camera, w, 0, - 1 );\n\t\tsetPoint( 'cn3', pointMap, geometry, _camera, 0, - h, - 1 );\n\t\tsetPoint( 'cn4', pointMap, geometry, _camera, 0, h, - 1 );\n\n\t\tgeometry.getAttribute( 'position' ).needsUpdate = true;\n\n\t}\n\n}\n\n\nfunction setPoint( point, pointMap, geometry, camera, x, y, z ) {\n\n\t_vector$c.set( x, y, z ).unproject( camera );\n\n\tconst points = pointMap[ point ];\n\n\tif ( points !== undefined ) {\n\n\t\tconst position = geometry.getAttribute( 'position' );\n\n\t\tfor ( let i = 0, l = points.length; i < l; i ++ ) {\n\n\t\t\tposition.setXYZ( points[ i ], _vector$c.x, _vector$c.y, _vector$c.z );\n\n\t\t}\n\n\t}\n\n}\n\nconst _box$3 = /*@__PURE__*/ new Box3();\n\nclass BoxHelper extends LineSegments {\n\n\tconstructor( object, color = 0xffff00 ) {\n\n\t\tconst indices = new Uint16Array( [ 0, 1, 1, 2, 2, 3, 3, 0, 4, 5, 5, 6, 6, 7, 7, 4, 0, 4, 1, 5, 2, 6, 3, 7 ] );\n\t\tconst positions = new Float32Array( 8 * 3 );\n\n\t\tconst geometry = new BufferGeometry();\n\t\tgeometry.setIndex( new BufferAttribute( indices, 1 ) );\n\t\tgeometry.setAttribute( 'position', new BufferAttribute( positions, 3 ) );\n\n\t\tsuper( geometry, new LineBasicMaterial( { color: color, toneMapped: false } ) );\n\n\t\tthis.object = object;\n\t\tthis.type = 'BoxHelper';\n\n\t\tthis.matrixAutoUpdate = false;\n\n\t\tthis.update();\n\n\t}\n\n\tupdate( object ) {\n\n\t\tif ( object !== undefined ) {\n\n\t\t\tconsole.warn( 'THREE.BoxHelper: .update() has no longer arguments.' );\n\n\t\t}\n\n\t\tif ( this.object !== undefined ) {\n\n\t\t\t_box$3.setFromObject( this.object );\n\n\t\t}\n\n\t\tif ( _box$3.isEmpty() ) return;\n\n\t\tconst min = _box$3.min;\n\t\tconst max = _box$3.max;\n\n\t\t/*\n\t\t\t5____4\n\t\t1/___0/|\n\t\t| 6__|_7\n\t\t2/___3/\n\n\t\t0: max.x, max.y, max.z\n\t\t1: min.x, max.y, max.z\n\t\t2: min.x, min.y, max.z\n\t\t3: max.x, min.y, max.z\n\t\t4: max.x, max.y, min.z\n\t\t5: min.x, max.y, min.z\n\t\t6: min.x, min.y, min.z\n\t\t7: max.x, min.y, min.z\n\t\t*/\n\n\t\tconst position = this.geometry.attributes.position;\n\t\tconst array = position.array;\n\n\t\tarray[ 0 ] = max.x; array[ 1 ] = max.y; array[ 2 ] = max.z;\n\t\tarray[ 3 ] = min.x; array[ 4 ] = max.y; array[ 5 ] = max.z;\n\t\tarray[ 6 ] = min.x; array[ 7 ] = min.y; array[ 8 ] = max.z;\n\t\tarray[ 9 ] = max.x; array[ 10 ] = min.y; array[ 11 ] = max.z;\n\t\tarray[ 12 ] = max.x; array[ 13 ] = max.y; array[ 14 ] = min.z;\n\t\tarray[ 15 ] = min.x; array[ 16 ] = max.y; array[ 17 ] = min.z;\n\t\tarray[ 18 ] = min.x; array[ 19 ] = min.y; array[ 20 ] = min.z;\n\t\tarray[ 21 ] = max.x; array[ 22 ] = min.y; array[ 23 ] = min.z;\n\n\t\tposition.needsUpdate = true;\n\n\t\tthis.geometry.computeBoundingSphere();\n\n\n\t}\n\n\tsetFromObject( object ) {\n\n\t\tthis.object = object;\n\t\tthis.update();\n\n\t\treturn this;\n\n\t}\n\n\tcopy( source ) {\n\n\t\tLineSegments.prototype.copy.call( this, source );\n\n\t\tthis.object = source.object;\n\n\t\treturn this;\n\n\t}\n\n}\n\nclass Box3Helper extends LineSegments {\n\n\tconstructor( box, color = 0xffff00 ) {\n\n\t\tconst indices = new Uint16Array( [ 0, 1, 1, 2, 2, 3, 3, 0, 4, 5, 5, 6, 6, 7, 7, 4, 0, 4, 1, 5, 2, 6, 3, 7 ] );\n\n\t\tconst positions = [ 1, 1, 1, - 1, 1, 1, - 1, - 1, 1, 1, - 1, 1, 1, 1, - 1, - 1, 1, - 1, - 1, - 1, - 1, 1, - 1, - 1 ];\n\n\t\tconst geometry = new BufferGeometry();\n\n\t\tgeometry.setIndex( new BufferAttribute( indices, 1 ) );\n\n\t\tgeometry.setAttribute( 'position', new Float32BufferAttribute( positions, 3 ) );\n\n\t\tsuper( geometry, new LineBasicMaterial( { color: color, toneMapped: false } ) );\n\n\t\tthis.box = box;\n\n\t\tthis.type = 'Box3Helper';\n\n\t\tthis.geometry.computeBoundingSphere();\n\n\t}\n\n\tupdateMatrixWorld( force ) {\n\n\t\tconst box = this.box;\n\n\t\tif ( box.isEmpty() ) return;\n\n\t\tbox.getCenter( this.position );\n\n\t\tbox.getSize( this.scale );\n\n\t\tthis.scale.multiplyScalar( 0.5 );\n\n\t\tsuper.updateMatrixWorld( force );\n\n\t}\n\n}\n\nclass PlaneHelper extends Line {\n\n\tconstructor( plane, size = 1, hex = 0xffff00 ) {\n\n\t\tconst color = hex;\n\n\t\tconst positions = [ 1, - 1, 1, - 1, 1, 1, - 1, - 1, 1, 1, 1, 1, - 1, 1, 1, - 1, - 1, 1, 1, - 1, 1, 1, 1, 1, 0, 0, 1, 0, 0, 0 ];\n\n\t\tconst geometry = new BufferGeometry();\n\t\tgeometry.setAttribute( 'position', new Float32BufferAttribute( positions, 3 ) );\n\t\tgeometry.computeBoundingSphere();\n\n\t\tsuper( geometry, new LineBasicMaterial( { color: color, toneMapped: false } ) );\n\n\t\tthis.type = 'PlaneHelper';\n\n\t\tthis.plane = plane;\n\n\t\tthis.size = size;\n\n\t\tconst positions2 = [ 1, 1, 1, - 1, 1, 1, - 1, - 1, 1, 1, 1, 1, - 1, - 1, 1, 1, - 1, 1 ];\n\n\t\tconst geometry2 = new BufferGeometry();\n\t\tgeometry2.setAttribute( 'position', new Float32BufferAttribute( positions2, 3 ) );\n\t\tgeometry2.computeBoundingSphere();\n\n\t\tthis.add( new Mesh( geometry2, new MeshBasicMaterial( { color: color, opacity: 0.2, transparent: true, depthWrite: false, toneMapped: false } ) ) );\n\n\t}\n\n\tupdateMatrixWorld( force ) {\n\n\t\tlet scale = - this.plane.constant;\n\n\t\tif ( Math.abs( scale ) < 1e-8 ) scale = 1e-8; // sign does not matter\n\n\t\tthis.scale.set( 0.5 * this.size, 0.5 * this.size, scale );\n\n\t\tthis.children[ 0 ].material.side = ( scale < 0 ) ? BackSide : FrontSide; // renderer flips side when determinant < 0; flipping not wanted here\n\n\t\tthis.lookAt( this.plane.normal );\n\n\t\tsuper.updateMatrixWorld( force );\n\n\t}\n\n}\n\nconst _axis = /*@__PURE__*/ new Vector3();\nlet _lineGeometry, _coneGeometry;\n\nclass ArrowHelper extends Object3D {\n\n\tconstructor( dir, origin, length, color, headLength, headWidth ) {\n\n\t\tsuper();\n\t\t// dir is assumed to be normalized\n\n\t\tthis.type = 'ArrowHelper';\n\n\t\tif ( dir === undefined ) dir = new Vector3( 0, 0, 1 );\n\t\tif ( origin === undefined ) origin = new Vector3( 0, 0, 0 );\n\t\tif ( length === undefined ) length = 1;\n\t\tif ( color === undefined ) color = 0xffff00;\n\t\tif ( headLength === undefined ) headLength = 0.2 * length;\n\t\tif ( headWidth === undefined ) headWidth = 0.2 * headLength;\n\n\t\tif ( _lineGeometry === undefined ) {\n\n\t\t\t_lineGeometry = new BufferGeometry();\n\t\t\t_lineGeometry.setAttribute( 'position', new Float32BufferAttribute( [ 0, 0, 0, 0, 1, 0 ], 3 ) );\n\n\t\t\t_coneGeometry = new CylinderGeometry( 0, 0.5, 1, 5, 1 );\n\t\t\t_coneGeometry.translate( 0, - 0.5, 0 );\n\n\t\t}\n\n\t\tthis.position.copy( origin );\n\n\t\tthis.line = new Line( _lineGeometry, new LineBasicMaterial( { color: color, toneMapped: false } ) );\n\t\tthis.line.matrixAutoUpdate = false;\n\t\tthis.add( this.line );\n\n\t\tthis.cone = new Mesh( _coneGeometry, new MeshBasicMaterial( { color: color, toneMapped: false } ) );\n\t\tthis.cone.matrixAutoUpdate = false;\n\t\tthis.add( this.cone );\n\n\t\tthis.setDirection( dir );\n\t\tthis.setLength( length, headLength, headWidth );\n\n\t}\n\n\tsetDirection( dir ) {\n\n\t\t// dir is assumed to be normalized\n\n\t\tif ( dir.y > 0.99999 ) {\n\n\t\t\tthis.quaternion.set( 0, 0, 0, 1 );\n\n\t\t} else if ( dir.y < - 0.99999 ) {\n\n\t\t\tthis.quaternion.set( 1, 0, 0, 0 );\n\n\t\t} else {\n\n\t\t\t_axis.set( dir.z, 0, - dir.x ).normalize();\n\n\t\t\tconst radians = Math.acos( dir.y );\n\n\t\t\tthis.quaternion.setFromAxisAngle( _axis, radians );\n\n\t\t}\n\n\t}\n\n\tsetLength( length, headLength, headWidth ) {\n\n\t\tif ( headLength === undefined ) headLength = 0.2 * length;\n\t\tif ( headWidth === undefined ) headWidth = 0.2 * headLength;\n\n\t\tthis.line.scale.set( 1, Math.max( 0.0001, length - headLength ), 1 ); // see #17458\n\t\tthis.line.updateMatrix();\n\n\t\tthis.cone.scale.set( headWidth, headLength, headWidth );\n\t\tthis.cone.position.y = length;\n\t\tthis.cone.updateMatrix();\n\n\t}\n\n\tsetColor( color ) {\n\n\t\tthis.line.material.color.set( color );\n\t\tthis.cone.material.color.set( color );\n\n\t}\n\n\tcopy( source ) {\n\n\t\tsuper.copy( source, false );\n\n\t\tthis.line.copy( source.line );\n\t\tthis.cone.copy( source.cone );\n\n\t\treturn this;\n\n\t}\n\n}\n\nclass AxesHelper extends LineSegments {\n\n\tconstructor( size = 1 ) {\n\n\t\tconst vertices = [\n\t\t\t0, 0, 0,\tsize, 0, 0,\n\t\t\t0, 0, 0,\t0, size, 0,\n\t\t\t0, 0, 0,\t0, 0, size\n\t\t];\n\n\t\tconst colors = [\n\t\t\t1, 0, 0,\t1, 0.6, 0,\n\t\t\t0, 1, 0,\t0.6, 1, 0,\n\t\t\t0, 0, 1,\t0, 0.6, 1\n\t\t];\n\n\t\tconst geometry = new BufferGeometry();\n\t\tgeometry.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\t\tgeometry.setAttribute( 'color', new Float32BufferAttribute( colors, 3 ) );\n\n\t\tconst material = new LineBasicMaterial( { vertexColors: true, toneMapped: false } );\n\n\t\tsuper( geometry, material );\n\n\t\tthis.type = 'AxesHelper';\n\n\t}\n\n}\n\nconst _floatView = new Float32Array( 1 );\nconst _int32View = new Int32Array( _floatView.buffer );\n\nconst DataUtils = {\n\n\t// Converts float32 to float16 (stored as uint16 value).\n\n\ttoHalfFloat: function ( val ) {\n\n\t\t// Source: http://gamedev.stackexchange.com/questions/17326/conversion-of-a-number-from-single-precision-floating-point-representation-to-a/17410#17410\n\n\t\t/* This method is faster than the OpenEXR implementation (very often\n\t\t* used, eg. in Ogre), with the additional benefit of rounding, inspired\n\t\t* by James Tursa?s half-precision code. */\n\n\t\t_floatView[ 0 ] = val;\n\t\tconst x = _int32View[ 0 ];\n\n\t\tlet bits = ( x >> 16 ) & 0x8000; /* Get the sign */\n\t\tlet m = ( x >> 12 ) & 0x07ff; /* Keep one extra bit for rounding */\n\t\tconst e = ( x >> 23 ) & 0xff; /* Using int is faster here */\n\n\t\t/* If zero, or denormal, or exponent underflows too much for a denormal\n\t\t\t* half, return signed zero. */\n\t\tif ( e < 103 ) return bits;\n\n\t\t/* If NaN, return NaN. If Inf or exponent overflow, return Inf. */\n\t\tif ( e > 142 ) {\n\n\t\t\tbits |= 0x7c00;\n\t\t\t/* If exponent was 0xff and one mantissa bit was set, it means NaN,\n\t\t\t\t\t\t* not Inf, so make sure we set one mantissa bit too. */\n\t\t\tbits |= ( ( e == 255 ) ? 0 : 1 ) && ( x & 0x007fffff );\n\t\t\treturn bits;\n\n\t\t}\n\n\t\t/* If exponent underflows but not too much, return a denormal */\n\t\tif ( e < 113 ) {\n\n\t\t\tm |= 0x0800;\n\t\t\t/* Extra rounding may overflow and set mantissa to 0 and exponent\n\t\t\t\t* to 1, which is OK. */\n\t\t\tbits |= ( m >> ( 114 - e ) ) + ( ( m >> ( 113 - e ) ) & 1 );\n\t\t\treturn bits;\n\n\t\t}\n\n\t\tbits |= ( ( e - 112 ) << 10 ) | ( m >> 1 );\n\t\t/* Extra rounding. An overflow will set mantissa to 0 and increment\n\t\t\t* the exponent, which is OK. */\n\t\tbits += m & 1;\n\t\treturn bits;\n\n\t}\n\n};\n\nconst LOD_MIN = 4;\nconst LOD_MAX = 8;\nconst SIZE_MAX = Math.pow( 2, LOD_MAX );\n\n// The standard deviations (radians) associated with the extra mips. These are\n// chosen to approximate a Trowbridge-Reitz distribution function times the\n// geometric shadowing function. These sigma values squared must match the\n// variance #defines in cube_uv_reflection_fragment.glsl.js.\nconst EXTRA_LOD_SIGMA = [ 0.125, 0.215, 0.35, 0.446, 0.526, 0.582 ];\n\nconst TOTAL_LODS = LOD_MAX - LOD_MIN + 1 + EXTRA_LOD_SIGMA.length;\n\n// The maximum length of the blur for loop. Smaller sigmas will use fewer\n// samples and exit early, but not recompile the shader.\nconst MAX_SAMPLES = 20;\n\nconst ENCODINGS = {\n\t[ LinearEncoding ]: 0,\n\t[ sRGBEncoding ]: 1,\n\t[ RGBEEncoding ]: 2,\n\t[ RGBM7Encoding ]: 3,\n\t[ RGBM16Encoding ]: 4,\n\t[ RGBDEncoding ]: 5,\n\t[ GammaEncoding ]: 6\n};\n\nconst backgroundMaterial = new MeshBasicMaterial( {\n\tside: BackSide,\n\tdepthWrite: false,\n\tdepthTest: false,\n} );\nconst backgroundBox = new Mesh( new BoxGeometry(), backgroundMaterial );\n\nconst _flatCamera = /*@__PURE__*/ new OrthographicCamera();\nconst { _lodPlanes, _sizeLods, _sigmas } = /*@__PURE__*/ _createPlanes();\nconst _clearColor = /*@__PURE__*/ new Color();\nlet _oldTarget = null;\n\n// Golden Ratio\nconst PHI = ( 1 + Math.sqrt( 5 ) ) / 2;\nconst INV_PHI = 1 / PHI;\n\n// Vertices of a dodecahedron (except the opposites, which represent the\n// same axis), used as axis directions evenly spread on a sphere.\nconst _axisDirections = [\n\t/*@__PURE__*/ new Vector3( 1, 1, 1 ),\n\t/*@__PURE__*/ new Vector3( - 1, 1, 1 ),\n\t/*@__PURE__*/ new Vector3( 1, 1, - 1 ),\n\t/*@__PURE__*/ new Vector3( - 1, 1, - 1 ),\n\t/*@__PURE__*/ new Vector3( 0, PHI, INV_PHI ),\n\t/*@__PURE__*/ new Vector3( 0, PHI, - INV_PHI ),\n\t/*@__PURE__*/ new Vector3( INV_PHI, 0, PHI ),\n\t/*@__PURE__*/ new Vector3( - INV_PHI, 0, PHI ),\n\t/*@__PURE__*/ new Vector3( PHI, INV_PHI, 0 ),\n\t/*@__PURE__*/ new Vector3( - PHI, INV_PHI, 0 ) ];\n\n/**\n * This class generates a Prefiltered, Mipmapped Radiance Environment Map\n * (PMREM) from a cubeMap environment texture. This allows different levels of\n * blur to be quickly accessed based on material roughness. It is packed into a\n * special CubeUV format that allows us to perform custom interpolation so that\n * we can support nonlinear formats such as RGBE. Unlike a traditional mipmap\n * chain, it only goes down to the LOD_MIN level (above), and then creates extra\n * even more filtered 'mips' at the same LOD_MIN resolution, associated with\n * higher roughness levels. In this way we maintain resolution to smoothly\n * interpolate diffuse lighting while limiting sampling computation.\n */\n\nfunction convertLinearToRGBE( color ) {\n\n\tconst maxComponent = Math.max( color.r, color.g, color.b );\n\tconst fExp = Math.min( Math.max( Math.ceil( Math.log2( maxComponent ) ), - 128.0 ), 127.0 );\n\tcolor.multiplyScalar( Math.pow( 2.0, - fExp ) );\n\n\tconst alpha = ( fExp + 128.0 ) / 255.0;\n\treturn alpha;\n\n}\n\nclass PMREMGenerator {\n\n\tconstructor( renderer ) {\n\n\t\tthis._renderer = renderer;\n\t\tthis._pingPongRenderTarget = null;\n\n\t\tthis._blurMaterial = _getBlurShader( MAX_SAMPLES );\n\t\tthis._equirectShader = null;\n\t\tthis._cubemapShader = null;\n\n\t\tthis._compileMaterial( this._blurMaterial );\n\n\t}\n\n\t/**\n\t * Generates a PMREM from a supplied Scene, which can be faster than using an\n\t * image if networking bandwidth is low. Optional sigma specifies a blur radius\n\t * in radians to be applied to the scene before PMREM generation. Optional near\n\t * and far planes ensure the scene is rendered in its entirety (the cubeCamera\n\t * is placed at the origin).\n\t */\n\tfromScene( scene, sigma = 0, near = 0.1, far = 100 ) {\n\n\t\t_oldTarget = this._renderer.getRenderTarget();\n\t\tconst cubeUVRenderTarget = this._allocateTargets();\n\n\t\tthis._sceneToCubeUV( scene, near, far, cubeUVRenderTarget );\n\t\tif ( sigma > 0 ) {\n\n\t\t\tthis._blur( cubeUVRenderTarget, 0, 0, sigma );\n\n\t\t}\n\n\t\tthis._applyPMREM( cubeUVRenderTarget );\n\t\tthis._cleanup( cubeUVRenderTarget );\n\n\t\treturn cubeUVRenderTarget;\n\n\t}\n\n\t/**\n\t * Generates a PMREM from an equirectangular texture, which can be either LDR\n\t * (RGBFormat) or HDR (RGBEFormat). The ideal input image size is 1k (1024 x 512),\n\t * as this matches best with the 256 x 256 cubemap output.\n\t */\n\tfromEquirectangular( equirectangular ) {\n\n\t\treturn this._fromTexture( equirectangular );\n\n\t}\n\n\t/**\n\t * Generates a PMREM from an cubemap texture, which can be either LDR\n\t * (RGBFormat) or HDR (RGBEFormat). The ideal input cube size is 256 x 256,\n\t * as this matches best with the 256 x 256 cubemap output.\n\t */\n\tfromCubemap( cubemap ) {\n\n\t\treturn this._fromTexture( cubemap );\n\n\t}\n\n\t/**\n\t * Pre-compiles the cubemap shader. You can get faster start-up by invoking this method during\n\t * your texture's network fetch for increased concurrency.\n\t */\n\tcompileCubemapShader() {\n\n\t\tif ( this._cubemapShader === null ) {\n\n\t\t\tthis._cubemapShader = _getCubemapShader();\n\t\t\tthis._compileMaterial( this._cubemapShader );\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Pre-compiles the equirectangular shader. You can get faster start-up by invoking this method during\n\t * your texture's network fetch for increased concurrency.\n\t */\n\tcompileEquirectangularShader() {\n\n\t\tif ( this._equirectShader === null ) {\n\n\t\t\tthis._equirectShader = _getEquirectShader();\n\t\t\tthis._compileMaterial( this._equirectShader );\n\n\t\t}\n\n\t}\n\n\t/**\n\t * Disposes of the PMREMGenerator's internal memory. Note that PMREMGenerator is a static class,\n\t * so you should not need more than one PMREMGenerator object. If you do, calling dispose() on\n\t * one of them will cause any others to also become unusable.\n\t */\n\tdispose() {\n\n\t\tthis._blurMaterial.dispose();\n\n\t\tif ( this._cubemapShader !== null ) this._cubemapShader.dispose();\n\t\tif ( this._equirectShader !== null ) this._equirectShader.dispose();\n\n\t\tfor ( let i = 0; i < _lodPlanes.length; i ++ ) {\n\n\t\t\t_lodPlanes[ i ].dispose();\n\n\t\t}\n\n\t}\n\n\t// private interface\n\n\t_cleanup( outputTarget ) {\n\n\t\tthis._pingPongRenderTarget.dispose();\n\t\tthis._renderer.setRenderTarget( _oldTarget );\n\t\toutputTarget.scissorTest = false;\n\t\t_setViewport( outputTarget, 0, 0, outputTarget.width, outputTarget.height );\n\n\t}\n\n\t_fromTexture( texture ) {\n\n\t\t_oldTarget = this._renderer.getRenderTarget();\n\t\tconst cubeUVRenderTarget = this._allocateTargets( texture );\n\t\tthis._textureToCubeUV( texture, cubeUVRenderTarget );\n\t\tthis._applyPMREM( cubeUVRenderTarget );\n\t\tthis._cleanup( cubeUVRenderTarget );\n\n\t\treturn cubeUVRenderTarget;\n\n\t}\n\n\t_allocateTargets( texture ) { // warning: null texture is valid\n\n\t\tconst params = {\n\t\t\tmagFilter: NearestFilter,\n\t\t\tminFilter: NearestFilter,\n\t\t\tgenerateMipmaps: false,\n\t\t\ttype: UnsignedByteType,\n\t\t\tformat: RGBEFormat,\n\t\t\tencoding: _isLDR( texture ) ? texture.encoding : RGBEEncoding,\n\t\t\tdepthBuffer: false\n\t\t};\n\n\t\tconst cubeUVRenderTarget = _createRenderTarget( params );\n\t\tcubeUVRenderTarget.depthBuffer = texture ? false : true;\n\t\tthis._pingPongRenderTarget = _createRenderTarget( params );\n\t\treturn cubeUVRenderTarget;\n\n\t}\n\n\t_compileMaterial( material ) {\n\n\t\tconst tmpMesh = new Mesh( _lodPlanes[ 0 ], material );\n\t\tthis._renderer.compile( tmpMesh, _flatCamera );\n\n\t}\n\n\t_sceneToCubeUV( scene, near, far, cubeUVRenderTarget ) {\n\n\t\tconst fov = 90;\n\t\tconst aspect = 1;\n\t\tconst cubeCamera = new PerspectiveCamera( fov, aspect, near, far );\n\t\tconst upSign = [ 1, - 1, 1, 1, 1, 1 ];\n\t\tconst forwardSign = [ 1, 1, 1, - 1, - 1, - 1 ];\n\t\tconst renderer = this._renderer;\n\n\t\tconst originalAutoClear = renderer.autoClear;\n\t\tconst outputEncoding = renderer.outputEncoding;\n\t\tconst toneMapping = renderer.toneMapping;\n\t\trenderer.getClearColor( _clearColor );\n\n\t\trenderer.toneMapping = NoToneMapping;\n\t\trenderer.outputEncoding = LinearEncoding;\n\t\trenderer.autoClear = false;\n\n\t\tlet useSolidColor = false;\n\t\tconst background = scene.background;\n\t\tif ( background ) {\n\n\t\t\tif ( background.isColor ) {\n\n\t\t\t\tbackgroundMaterial.color.copy( background ).convertSRGBToLinear();\n\t\t\t\tscene.background = null;\n\n\t\t\t\tconst alpha = convertLinearToRGBE( backgroundMaterial.color );\n\t\t\t\tbackgroundMaterial.opacity = alpha;\n\t\t\t\tuseSolidColor = true;\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\tbackgroundMaterial.color.copy( _clearColor ).convertSRGBToLinear();\n\n\t\t\tconst alpha = convertLinearToRGBE( backgroundMaterial.color );\n\t\t\tbackgroundMaterial.opacity = alpha;\n\t\t\tuseSolidColor = true;\n\n\t\t}\n\n\n\t\tfor ( let i = 0; i < 6; i ++ ) {\n\n\t\t\tconst col = i % 3;\n\t\t\tif ( col == 0 ) {\n\n\t\t\t\tcubeCamera.up.set( 0, upSign[ i ], 0 );\n\t\t\t\tcubeCamera.lookAt( forwardSign[ i ], 0, 0 );\n\n\t\t\t} else if ( col == 1 ) {\n\n\t\t\t\tcubeCamera.up.set( 0, 0, upSign[ i ] );\n\t\t\t\tcubeCamera.lookAt( 0, forwardSign[ i ], 0 );\n\n\t\t\t} else {\n\n\t\t\t\tcubeCamera.up.set( 0, upSign[ i ], 0 );\n\t\t\t\tcubeCamera.lookAt( 0, 0, forwardSign[ i ] );\n\n\t\t\t}\n\n\t\t\t_setViewport( cubeUVRenderTarget,\n\t\t\t\tcol * SIZE_MAX, i > 2 ? SIZE_MAX : 0, SIZE_MAX, SIZE_MAX );\n\t\t\trenderer.setRenderTarget( cubeUVRenderTarget );\n\n\t\t\tif ( useSolidColor ) {\n\n\t\t\t\trenderer.render( backgroundBox, cubeCamera );\n\n\t\t\t}\n\n\t\t\trenderer.render( scene, cubeCamera );\n\n\t\t}\n\n\t\trenderer.toneMapping = toneMapping;\n\t\trenderer.outputEncoding = outputEncoding;\n\t\trenderer.autoClear = originalAutoClear;\n\n\t}\n\n\t_textureToCubeUV( texture, cubeUVRenderTarget ) {\n\n\t\tconst renderer = this._renderer;\n\n\t\tif ( texture.isCubeTexture ) {\n\n\t\t\tif ( this._cubemapShader == null ) {\n\n\t\t\t\tthis._cubemapShader = _getCubemapShader();\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\tif ( this._equirectShader == null ) {\n\n\t\t\t\tthis._equirectShader = _getEquirectShader();\n\n\t\t\t}\n\n\t\t}\n\n\t\tconst material = texture.isCubeTexture ? this._cubemapShader : this._equirectShader;\n\t\tconst mesh = new Mesh( _lodPlanes[ 0 ], material );\n\n\t\tconst uniforms = material.uniforms;\n\n\t\tuniforms[ 'envMap' ].value = texture;\n\n\t\tif ( ! texture.isCubeTexture ) {\n\n\t\t\tuniforms[ 'texelSize' ].value.set( 1.0 / texture.image.width, 1.0 / texture.image.height );\n\n\t\t}\n\n\t\tuniforms[ 'inputEncoding' ].value = ENCODINGS[ texture.encoding ];\n\t\tuniforms[ 'outputEncoding' ].value = ENCODINGS[ cubeUVRenderTarget.texture.encoding ];\n\n\t\t_setViewport( cubeUVRenderTarget, 0, 0, 3 * SIZE_MAX, 2 * SIZE_MAX );\n\n\t\trenderer.setRenderTarget( cubeUVRenderTarget );\n\t\trenderer.render( mesh, _flatCamera );\n\n\t}\n\n\t_applyPMREM( cubeUVRenderTarget ) {\n\n\t\tconst renderer = this._renderer;\n\t\tconst autoClear = renderer.autoClear;\n\t\trenderer.autoClear = false;\n\n\t\tfor ( let i = 1; i < TOTAL_LODS; i ++ ) {\n\n\t\t\tconst sigma = Math.sqrt( _sigmas[ i ] * _sigmas[ i ] - _sigmas[ i - 1 ] * _sigmas[ i - 1 ] );\n\n\t\t\tconst poleAxis = _axisDirections[ ( i - 1 ) % _axisDirections.length ];\n\n\t\t\tthis._blur( cubeUVRenderTarget, i - 1, i, sigma, poleAxis );\n\n\t\t}\n\n\t\trenderer.autoClear = autoClear;\n\n\t}\n\n\t/**\n\t * This is a two-pass Gaussian blur for a cubemap. Normally this is done\n\t * vertically and horizontally, but this breaks down on a cube. Here we apply\n\t * the blur latitudinally (around the poles), and then longitudinally (towards\n\t * the poles) to approximate the orthogonally-separable blur. It is least\n\t * accurate at the poles, but still does a decent job.\n\t */\n\t_blur( cubeUVRenderTarget, lodIn, lodOut, sigma, poleAxis ) {\n\n\t\tconst pingPongRenderTarget = this._pingPongRenderTarget;\n\n\t\tthis._halfBlur(\n\t\t\tcubeUVRenderTarget,\n\t\t\tpingPongRenderTarget,\n\t\t\tlodIn,\n\t\t\tlodOut,\n\t\t\tsigma,\n\t\t\t'latitudinal',\n\t\t\tpoleAxis );\n\n\t\tthis._halfBlur(\n\t\t\tpingPongRenderTarget,\n\t\t\tcubeUVRenderTarget,\n\t\t\tlodOut,\n\t\t\tlodOut,\n\t\t\tsigma,\n\t\t\t'longitudinal',\n\t\t\tpoleAxis );\n\n\t}\n\n\t_halfBlur( targetIn, targetOut, lodIn, lodOut, sigmaRadians, direction, poleAxis ) {\n\n\t\tconst renderer = this._renderer;\n\t\tconst blurMaterial = this._blurMaterial;\n\n\t\tif ( direction !== 'latitudinal' && direction !== 'longitudinal' ) {\n\n\t\t\tconsole.error(\n\t\t\t\t'blur direction must be either latitudinal or longitudinal!' );\n\n\t\t}\n\n\t\t// Number of standard deviations at which to cut off the discrete approximation.\n\t\tconst STANDARD_DEVIATIONS = 3;\n\n\t\tconst blurMesh = new Mesh( _lodPlanes[ lodOut ], blurMaterial );\n\t\tconst blurUniforms = blurMaterial.uniforms;\n\n\t\tconst pixels = _sizeLods[ lodIn ] - 1;\n\t\tconst radiansPerPixel = isFinite( sigmaRadians ) ? Math.PI / ( 2 * pixels ) : 2 * Math.PI / ( 2 * MAX_SAMPLES - 1 );\n\t\tconst sigmaPixels = sigmaRadians / radiansPerPixel;\n\t\tconst samples = isFinite( sigmaRadians ) ? 1 + Math.floor( STANDARD_DEVIATIONS * sigmaPixels ) : MAX_SAMPLES;\n\n\t\tif ( samples > MAX_SAMPLES ) {\n\n\t\t\tconsole.warn( `sigmaRadians, ${\n\t\t\t\tsigmaRadians}, is too large and will clip, as it requested ${\n\t\t\t\tsamples} samples when the maximum is set to ${MAX_SAMPLES}` );\n\n\t\t}\n\n\t\tconst weights = [];\n\t\tlet sum = 0;\n\n\t\tfor ( let i = 0; i < MAX_SAMPLES; ++ i ) {\n\n\t\t\tconst x = i / sigmaPixels;\n\t\t\tconst weight = Math.exp( - x * x / 2 );\n\t\t\tweights.push( weight );\n\n\t\t\tif ( i == 0 ) {\n\n\t\t\t\tsum += weight;\n\n\t\t\t} else if ( i < samples ) {\n\n\t\t\t\tsum += 2 * weight;\n\n\t\t\t}\n\n\t\t}\n\n\t\tfor ( let i = 0; i < weights.length; i ++ ) {\n\n\t\t\tweights[ i ] = weights[ i ] / sum;\n\n\t\t}\n\n\t\tblurUniforms[ 'envMap' ].value = targetIn.texture;\n\t\tblurUniforms[ 'samples' ].value = samples;\n\t\tblurUniforms[ 'weights' ].value = weights;\n\t\tblurUniforms[ 'latitudinal' ].value = direction === 'latitudinal';\n\n\t\tif ( poleAxis ) {\n\n\t\t\tblurUniforms[ 'poleAxis' ].value = poleAxis;\n\n\t\t}\n\n\t\tblurUniforms[ 'dTheta' ].value = radiansPerPixel;\n\t\tblurUniforms[ 'mipInt' ].value = LOD_MAX - lodIn;\n\t\tblurUniforms[ 'inputEncoding' ].value = ENCODINGS[ targetIn.texture.encoding ];\n\t\tblurUniforms[ 'outputEncoding' ].value = ENCODINGS[ targetIn.texture.encoding ];\n\n\t\tconst outputSize = _sizeLods[ lodOut ];\n\t\tconst x = 3 * Math.max( 0, SIZE_MAX - 2 * outputSize );\n\t\tconst y = ( lodOut === 0 ? 0 : 2 * SIZE_MAX ) + 2 * outputSize * ( lodOut > LOD_MAX - LOD_MIN ? lodOut - LOD_MAX + LOD_MIN : 0 );\n\n\t\t_setViewport( targetOut, x, y, 3 * outputSize, 2 * outputSize );\n\t\trenderer.setRenderTarget( targetOut );\n\t\trenderer.render( blurMesh, _flatCamera );\n\n\t}\n\n}\n\nfunction _isLDR( texture ) {\n\n\tif ( texture === undefined || texture.type !== UnsignedByteType ) return false;\n\n\treturn texture.encoding === LinearEncoding || texture.encoding === sRGBEncoding || texture.encoding === GammaEncoding;\n\n}\n\nfunction _createPlanes() {\n\n\tconst _lodPlanes = [];\n\tconst _sizeLods = [];\n\tconst _sigmas = [];\n\n\tlet lod = LOD_MAX;\n\n\tfor ( let i = 0; i < TOTAL_LODS; i ++ ) {\n\n\t\tconst sizeLod = Math.pow( 2, lod );\n\t\t_sizeLods.push( sizeLod );\n\t\tlet sigma = 1.0 / sizeLod;\n\n\t\tif ( i > LOD_MAX - LOD_MIN ) {\n\n\t\t\tsigma = EXTRA_LOD_SIGMA[ i - LOD_MAX + LOD_MIN - 1 ];\n\n\t\t} else if ( i == 0 ) {\n\n\t\t\tsigma = 0;\n\n\t\t}\n\n\t\t_sigmas.push( sigma );\n\n\t\tconst texelSize = 1.0 / ( sizeLod - 1 );\n\t\tconst min = - texelSize / 2;\n\t\tconst max = 1 + texelSize / 2;\n\t\tconst uv1 = [ min, min, max, min, max, max, min, min, max, max, min, max ];\n\n\t\tconst cubeFaces = 6;\n\t\tconst vertices = 6;\n\t\tconst positionSize = 3;\n\t\tconst uvSize = 2;\n\t\tconst faceIndexSize = 1;\n\n\t\tconst position = new Float32Array( positionSize * vertices * cubeFaces );\n\t\tconst uv = new Float32Array( uvSize * vertices * cubeFaces );\n\t\tconst faceIndex = new Float32Array( faceIndexSize * vertices * cubeFaces );\n\n\t\tfor ( let face = 0; face < cubeFaces; face ++ ) {\n\n\t\t\tconst x = ( face % 3 ) * 2 / 3 - 1;\n\t\t\tconst y = face > 2 ? 0 : - 1;\n\t\t\tconst coordinates = [\n\t\t\t\tx, y, 0,\n\t\t\t\tx + 2 / 3, y, 0,\n\t\t\t\tx + 2 / 3, y + 1, 0,\n\t\t\t\tx, y, 0,\n\t\t\t\tx + 2 / 3, y + 1, 0,\n\t\t\t\tx, y + 1, 0\n\t\t\t];\n\t\t\tposition.set( coordinates, positionSize * vertices * face );\n\t\t\tuv.set( uv1, uvSize * vertices * face );\n\t\t\tconst fill = [ face, face, face, face, face, face ];\n\t\t\tfaceIndex.set( fill, faceIndexSize * vertices * face );\n\n\t\t}\n\n\t\tconst planes = new BufferGeometry();\n\t\tplanes.setAttribute( 'position', new BufferAttribute( position, positionSize ) );\n\t\tplanes.setAttribute( 'uv', new BufferAttribute( uv, uvSize ) );\n\t\tplanes.setAttribute( 'faceIndex', new BufferAttribute( faceIndex, faceIndexSize ) );\n\t\t_lodPlanes.push( planes );\n\n\t\tif ( lod > LOD_MIN ) {\n\n\t\t\tlod --;\n\n\t\t}\n\n\t}\n\n\treturn { _lodPlanes, _sizeLods, _sigmas };\n\n}\n\nfunction _createRenderTarget( params ) {\n\n\tconst cubeUVRenderTarget = new WebGLRenderTarget( 3 * SIZE_MAX, 3 * SIZE_MAX, params );\n\tcubeUVRenderTarget.texture.mapping = CubeUVReflectionMapping;\n\tcubeUVRenderTarget.texture.name = 'PMREM.cubeUv';\n\tcubeUVRenderTarget.scissorTest = true;\n\treturn cubeUVRenderTarget;\n\n}\n\nfunction _setViewport( target, x, y, width, height ) {\n\n\ttarget.viewport.set( x, y, width, height );\n\ttarget.scissor.set( x, y, width, height );\n\n}\n\nfunction _getBlurShader( maxSamples ) {\n\n\tconst weights = new Float32Array( maxSamples );\n\tconst poleAxis = new Vector3( 0, 1, 0 );\n\tconst shaderMaterial = new RawShaderMaterial( {\n\n\t\tname: 'SphericalGaussianBlur',\n\n\t\tdefines: { 'n': maxSamples },\n\n\t\tuniforms: {\n\t\t\t'envMap': { value: null },\n\t\t\t'samples': { value: 1 },\n\t\t\t'weights': { value: weights },\n\t\t\t'latitudinal': { value: false },\n\t\t\t'dTheta': { value: 0 },\n\t\t\t'mipInt': { value: 0 },\n\t\t\t'poleAxis': { value: poleAxis },\n\t\t\t'inputEncoding': { value: ENCODINGS[ LinearEncoding ] },\n\t\t\t'outputEncoding': { value: ENCODINGS[ LinearEncoding ] }\n\t\t},\n\n\t\tvertexShader: _getCommonVertexShader(),\n\n\t\tfragmentShader: /* glsl */`\n\n\t\t\tprecision mediump float;\n\t\t\tprecision mediump int;\n\n\t\t\tvarying vec3 vOutputDirection;\n\n\t\t\tuniform sampler2D envMap;\n\t\t\tuniform int samples;\n\t\t\tuniform float weights[ n ];\n\t\t\tuniform bool latitudinal;\n\t\t\tuniform float dTheta;\n\t\t\tuniform float mipInt;\n\t\t\tuniform vec3 poleAxis;\n\n\t\t\t${ _getEncodings() }\n\n\t\t\t#define ENVMAP_TYPE_CUBE_UV\n\t\t\t#include <cube_uv_reflection_fragment>\n\n\t\t\tvec3 getSample( float theta, vec3 axis ) {\n\n\t\t\t\tfloat cosTheta = cos( theta );\n\t\t\t\t// Rodrigues' axis-angle rotation\n\t\t\t\tvec3 sampleDirection = vOutputDirection * cosTheta\n\t\t\t\t\t+ cross( axis, vOutputDirection ) * sin( theta )\n\t\t\t\t\t+ axis * dot( axis, vOutputDirection ) * ( 1.0 - cosTheta );\n\n\t\t\t\treturn bilinearCubeUV( envMap, sampleDirection, mipInt );\n\n\t\t\t}\n\n\t\t\tvoid main() {\n\n\t\t\t\tvec3 axis = latitudinal ? poleAxis : cross( poleAxis, vOutputDirection );\n\n\t\t\t\tif ( all( equal( axis, vec3( 0.0 ) ) ) ) {\n\n\t\t\t\t\taxis = vec3( vOutputDirection.z, 0.0, - vOutputDirection.x );\n\n\t\t\t\t}\n\n\t\t\t\taxis = normalize( axis );\n\n\t\t\t\tgl_FragColor = vec4( 0.0, 0.0, 0.0, 1.0 );\n\t\t\t\tgl_FragColor.rgb += weights[ 0 ] * getSample( 0.0, axis );\n\n\t\t\t\tfor ( int i = 1; i < n; i++ ) {\n\n\t\t\t\t\tif ( i >= samples ) {\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t}\n\n\t\t\t\t\tfloat theta = dTheta * float( i );\n\t\t\t\t\tgl_FragColor.rgb += weights[ i ] * getSample( -1.0 * theta, axis );\n\t\t\t\t\tgl_FragColor.rgb += weights[ i ] * getSample( theta, axis );\n\n\t\t\t\t}\n\n\t\t\t\tgl_FragColor = linearToOutputTexel( gl_FragColor );\n\n\t\t\t}\n\t\t`,\n\n\t\tblending: NoBlending,\n\t\tdepthTest: false,\n\t\tdepthWrite: false\n\n\t} );\n\n\treturn shaderMaterial;\n\n}\n\nfunction _getEquirectShader() {\n\n\tconst texelSize = new Vector2( 1, 1 );\n\tconst shaderMaterial = new RawShaderMaterial( {\n\n\t\tname: 'EquirectangularToCubeUV',\n\n\t\tuniforms: {\n\t\t\t'envMap': { value: null },\n\t\t\t'texelSize': { value: texelSize },\n\t\t\t'inputEncoding': { value: ENCODINGS[ LinearEncoding ] },\n\t\t\t'outputEncoding': { value: ENCODINGS[ LinearEncoding ] }\n\t\t},\n\n\t\tvertexShader: _getCommonVertexShader(),\n\n\t\tfragmentShader: /* glsl */`\n\n\t\t\tprecision mediump float;\n\t\t\tprecision mediump int;\n\n\t\t\tvarying vec3 vOutputDirection;\n\n\t\t\tuniform sampler2D envMap;\n\t\t\tuniform vec2 texelSize;\n\n\t\t\t${ _getEncodings() }\n\n\t\t\t#include <common>\n\n\t\t\tvoid main() {\n\n\t\t\t\tgl_FragColor = vec4( 0.0, 0.0, 0.0, 1.0 );\n\n\t\t\t\tvec3 outputDirection = normalize( vOutputDirection );\n\t\t\t\tvec2 uv = equirectUv( outputDirection );\n\n\t\t\t\tvec2 f = fract( uv / texelSize - 0.5 );\n\t\t\t\tuv -= f * texelSize;\n\t\t\t\tvec3 tl = envMapTexelToLinear( texture2D ( envMap, uv ) ).rgb;\n\t\t\t\tuv.x += texelSize.x;\n\t\t\t\tvec3 tr = envMapTexelToLinear( texture2D ( envMap, uv ) ).rgb;\n\t\t\t\tuv.y += texelSize.y;\n\t\t\t\tvec3 br = envMapTexelToLinear( texture2D ( envMap, uv ) ).rgb;\n\t\t\t\tuv.x -= texelSize.x;\n\t\t\t\tvec3 bl = envMapTexelToLinear( texture2D ( envMap, uv ) ).rgb;\n\n\t\t\t\tvec3 tm = mix( tl, tr, f.x );\n\t\t\t\tvec3 bm = mix( bl, br, f.x );\n\t\t\t\tgl_FragColor.rgb = mix( tm, bm, f.y );\n\n\t\t\t\tgl_FragColor = linearToOutputTexel( gl_FragColor );\n\n\t\t\t}\n\t\t`,\n\n\t\tblending: NoBlending,\n\t\tdepthTest: false,\n\t\tdepthWrite: false\n\n\t} );\n\n\treturn shaderMaterial;\n\n}\n\nfunction _getCubemapShader() {\n\n\tconst shaderMaterial = new RawShaderMaterial( {\n\n\t\tname: 'CubemapToCubeUV',\n\n\t\tuniforms: {\n\t\t\t'envMap': { value: null },\n\t\t\t'inputEncoding': { value: ENCODINGS[ LinearEncoding ] },\n\t\t\t'outputEncoding': { value: ENCODINGS[ LinearEncoding ] }\n\t\t},\n\n\t\tvertexShader: _getCommonVertexShader(),\n\n\t\tfragmentShader: /* glsl */`\n\n\t\t\tprecision mediump float;\n\t\t\tprecision mediump int;\n\n\t\t\tvarying vec3 vOutputDirection;\n\n\t\t\tuniform samplerCube envMap;\n\n\t\t\t${ _getEncodings() }\n\n\t\t\tvoid main() {\n\n\t\t\t\tgl_FragColor = vec4( 0.0, 0.0, 0.0, 1.0 );\n\t\t\t\tgl_FragColor.rgb = envMapTexelToLinear( textureCube( envMap, vec3( - vOutputDirection.x, vOutputDirection.yz ) ) ).rgb;\n\t\t\t\tgl_FragColor = linearToOutputTexel( gl_FragColor );\n\n\t\t\t}\n\t\t`,\n\n\t\tblending: NoBlending,\n\t\tdepthTest: false,\n\t\tdepthWrite: false\n\n\t} );\n\n\treturn shaderMaterial;\n\n}\n\nfunction _getCommonVertexShader() {\n\n\treturn /* glsl */`\n\n\t\tprecision mediump float;\n\t\tprecision mediump int;\n\n\t\tattribute vec3 position;\n\t\tattribute vec2 uv;\n\t\tattribute float faceIndex;\n\n\t\tvarying vec3 vOutputDirection;\n\n\t\t// RH coordinate system; PMREM face-indexing convention\n\t\tvec3 getDirection( vec2 uv, float face ) {\n\n\t\t\tuv = 2.0 * uv - 1.0;\n\n\t\t\tvec3 direction = vec3( uv, 1.0 );\n\n\t\t\tif ( face == 0.0 ) {\n\n\t\t\t\tdirection = direction.zyx; // ( 1, v, u ) pos x\n\n\t\t\t} else if ( face == 1.0 ) {\n\n\t\t\t\tdirection = direction.xzy;\n\t\t\t\tdirection.xz *= -1.0; // ( -u, 1, -v ) pos y\n\n\t\t\t} else if ( face == 2.0 ) {\n\n\t\t\t\tdirection.x *= -1.0; // ( -u, v, 1 ) pos z\n\n\t\t\t} else if ( face == 3.0 ) {\n\n\t\t\t\tdirection = direction.zyx;\n\t\t\t\tdirection.xz *= -1.0; // ( -1, v, -u ) neg x\n\n\t\t\t} else if ( face == 4.0 ) {\n\n\t\t\t\tdirection = direction.xzy;\n\t\t\t\tdirection.xy *= -1.0; // ( -u, -1, v ) neg y\n\n\t\t\t} else if ( face == 5.0 ) {\n\n\t\t\t\tdirection.z *= -1.0; // ( u, v, -1 ) neg z\n\n\t\t\t}\n\n\t\t\treturn direction;\n\n\t\t}\n\n\t\tvoid main() {\n\n\t\t\tvOutputDirection = getDirection( uv, faceIndex );\n\t\t\tgl_Position = vec4( position, 1.0 );\n\n\t\t}\n\t`;\n\n}\n\nfunction _getEncodings() {\n\n\treturn /* glsl */`\n\n\t\tuniform int inputEncoding;\n\t\tuniform int outputEncoding;\n\n\t\t#include <encodings_pars_fragment>\n\n\t\tvec4 inputTexelToLinear( vec4 value ) {\n\n\t\t\tif ( inputEncoding == 0 ) {\n\n\t\t\t\treturn value;\n\n\t\t\t} else if ( inputEncoding == 1 ) {\n\n\t\t\t\treturn sRGBToLinear( value );\n\n\t\t\t} else if ( inputEncoding == 2 ) {\n\n\t\t\t\treturn RGBEToLinear( value );\n\n\t\t\t} else if ( inputEncoding == 3 ) {\n\n\t\t\t\treturn RGBMToLinear( value, 7.0 );\n\n\t\t\t} else if ( inputEncoding == 4 ) {\n\n\t\t\t\treturn RGBMToLinear( value, 16.0 );\n\n\t\t\t} else if ( inputEncoding == 5 ) {\n\n\t\t\t\treturn RGBDToLinear( value, 256.0 );\n\n\t\t\t} else {\n\n\t\t\t\treturn GammaToLinear( value, 2.2 );\n\n\t\t\t}\n\n\t\t}\n\n\t\tvec4 linearToOutputTexel( vec4 value ) {\n\n\t\t\tif ( outputEncoding == 0 ) {\n\n\t\t\t\treturn value;\n\n\t\t\t} else if ( outputEncoding == 1 ) {\n\n\t\t\t\treturn LinearTosRGB( value );\n\n\t\t\t} else if ( outputEncoding == 2 ) {\n\n\t\t\t\treturn LinearToRGBE( value );\n\n\t\t\t} else if ( outputEncoding == 3 ) {\n\n\t\t\t\treturn LinearToRGBM( value, 7.0 );\n\n\t\t\t} else if ( outputEncoding == 4 ) {\n\n\t\t\t\treturn LinearToRGBM( value, 16.0 );\n\n\t\t\t} else if ( outputEncoding == 5 ) {\n\n\t\t\t\treturn LinearToRGBD( value, 256.0 );\n\n\t\t\t} else {\n\n\t\t\t\treturn LinearToGamma( value, 2.2 );\n\n\t\t\t}\n\n\t\t}\n\n\t\tvec4 envMapTexelToLinear( vec4 color ) {\n\n\t\t\treturn inputTexelToLinear( color );\n\n\t\t}\n\t`;\n\n}\n\nfunction Face4( a, b, c, d, normal, color, materialIndex ) {\n\n\tconsole.warn( 'THREE.Face4 has been removed. A THREE.Face3 will be created instead.' );\n\treturn new Face3( a, b, c, normal, color, materialIndex );\n\n}\n\nconst LineStrip = 0;\nconst LinePieces = 1;\nconst NoColors = 0;\nconst FaceColors = 1;\nconst VertexColors = 2;\n\nfunction MeshFaceMaterial( materials ) {\n\n\tconsole.warn( 'THREE.MeshFaceMaterial has been removed. Use an Array instead.' );\n\treturn materials;\n\n}\n\nfunction MultiMaterial( materials = [] ) {\n\n\tconsole.warn( 'THREE.MultiMaterial has been removed. Use an Array instead.' );\n\tmaterials.isMultiMaterial = true;\n\tmaterials.materials = materials;\n\tmaterials.clone = function () {\n\n\t\treturn materials.slice();\n\n\t};\n\n\treturn materials;\n\n}\n\nfunction PointCloud( geometry, material ) {\n\n\tconsole.warn( 'THREE.PointCloud has been renamed to THREE.Points.' );\n\treturn new Points( geometry, material );\n\n}\n\nfunction Particle( material ) {\n\n\tconsole.warn( 'THREE.Particle has been renamed to THREE.Sprite.' );\n\treturn new Sprite( material );\n\n}\n\nfunction ParticleSystem( geometry, material ) {\n\n\tconsole.warn( 'THREE.ParticleSystem has been renamed to THREE.Points.' );\n\treturn new Points( geometry, material );\n\n}\n\nfunction PointCloudMaterial( parameters ) {\n\n\tconsole.warn( 'THREE.PointCloudMaterial has been renamed to THREE.PointsMaterial.' );\n\treturn new PointsMaterial( parameters );\n\n}\n\nfunction ParticleBasicMaterial( parameters ) {\n\n\tconsole.warn( 'THREE.ParticleBasicMaterial has been renamed to THREE.PointsMaterial.' );\n\treturn new PointsMaterial( parameters );\n\n}\n\nfunction ParticleSystemMaterial( parameters ) {\n\n\tconsole.warn( 'THREE.ParticleSystemMaterial has been renamed to THREE.PointsMaterial.' );\n\treturn new PointsMaterial( parameters );\n\n}\n\nfunction Vertex( x, y, z ) {\n\n\tconsole.warn( 'THREE.Vertex has been removed. Use THREE.Vector3 instead.' );\n\treturn new Vector3( x, y, z );\n\n}\n\n//\n\nfunction DynamicBufferAttribute( array, itemSize ) {\n\n\tconsole.warn( 'THREE.DynamicBufferAttribute has been removed. Use new THREE.BufferAttribute().setUsage( THREE.DynamicDrawUsage ) instead.' );\n\treturn new BufferAttribute( array, itemSize ).setUsage( DynamicDrawUsage );\n\n}\n\nfunction Int8Attribute( array, itemSize ) {\n\n\tconsole.warn( 'THREE.Int8Attribute has been removed. Use new THREE.Int8BufferAttribute() instead.' );\n\treturn new Int8BufferAttribute( array, itemSize );\n\n}\n\nfunction Uint8Attribute( array, itemSize ) {\n\n\tconsole.warn( 'THREE.Uint8Attribute has been removed. Use new THREE.Uint8BufferAttribute() instead.' );\n\treturn new Uint8BufferAttribute( array, itemSize );\n\n}\n\nfunction Uint8ClampedAttribute( array, itemSize ) {\n\n\tconsole.warn( 'THREE.Uint8ClampedAttribute has been removed. Use new THREE.Uint8ClampedBufferAttribute() instead.' );\n\treturn new Uint8ClampedBufferAttribute( array, itemSize );\n\n}\n\nfunction Int16Attribute( array, itemSize ) {\n\n\tconsole.warn( 'THREE.Int16Attribute has been removed. Use new THREE.Int16BufferAttribute() instead.' );\n\treturn new Int16BufferAttribute( array, itemSize );\n\n}\n\nfunction Uint16Attribute( array, itemSize ) {\n\n\tconsole.warn( 'THREE.Uint16Attribute has been removed. Use new THREE.Uint16BufferAttribute() instead.' );\n\treturn new Uint16BufferAttribute( array, itemSize );\n\n}\n\nfunction Int32Attribute( array, itemSize ) {\n\n\tconsole.warn( 'THREE.Int32Attribute has been removed. Use new THREE.Int32BufferAttribute() instead.' );\n\treturn new Int32BufferAttribute( array, itemSize );\n\n}\n\nfunction Uint32Attribute( array, itemSize ) {\n\n\tconsole.warn( 'THREE.Uint32Attribute has been removed. Use new THREE.Uint32BufferAttribute() instead.' );\n\treturn new Uint32BufferAttribute( array, itemSize );\n\n}\n\nfunction Float32Attribute( array, itemSize ) {\n\n\tconsole.warn( 'THREE.Float32Attribute has been removed. Use new THREE.Float32BufferAttribute() instead.' );\n\treturn new Float32BufferAttribute( array, itemSize );\n\n}\n\nfunction Float64Attribute( array, itemSize ) {\n\n\tconsole.warn( 'THREE.Float64Attribute has been removed. Use new THREE.Float64BufferAttribute() instead.' );\n\treturn new Float64BufferAttribute( array, itemSize );\n\n}\n\n//\n\nCurve.create = function ( construct, getPoint ) {\n\n\tconsole.log( 'THREE.Curve.create() has been deprecated' );\n\n\tconstruct.prototype = Object.create( Curve.prototype );\n\tconstruct.prototype.constructor = construct;\n\tconstruct.prototype.getPoint = getPoint;\n\n\treturn construct;\n\n};\n\n//\n\nObject.assign( Path.prototype, {\n\n\tfromPoints: function ( points ) {\n\n\t\tconsole.warn( 'THREE.Path: .fromPoints() has been renamed to .setFromPoints().' );\n\t\treturn this.setFromPoints( points );\n\n\t}\n\n} );\n\n//\n\nfunction ClosedSplineCurve3( points ) {\n\n\tconsole.warn( 'THREE.ClosedSplineCurve3 has been deprecated. Use THREE.CatmullRomCurve3 instead.' );\n\n\tCatmullRomCurve3.call( this, points );\n\tthis.type = 'catmullrom';\n\tthis.closed = true;\n\n}\n\nClosedSplineCurve3.prototype = Object.create( CatmullRomCurve3.prototype );\n\n//\n\nfunction SplineCurve3( points ) {\n\n\tconsole.warn( 'THREE.SplineCurve3 has been deprecated. Use THREE.CatmullRomCurve3 instead.' );\n\n\tCatmullRomCurve3.call( this, points );\n\tthis.type = 'catmullrom';\n\n}\n\nSplineCurve3.prototype = Object.create( CatmullRomCurve3.prototype );\n\n//\n\nfunction Spline( points ) {\n\n\tconsole.warn( 'THREE.Spline has been removed. Use THREE.CatmullRomCurve3 instead.' );\n\n\tCatmullRomCurve3.call( this, points );\n\tthis.type = 'catmullrom';\n\n}\n\nSpline.prototype = Object.create( CatmullRomCurve3.prototype );\n\nObject.assign( Spline.prototype, {\n\n\tinitFromArray: function ( /* a */ ) {\n\n\t\tconsole.error( 'THREE.Spline: .initFromArray() has been removed.' );\n\n\t},\n\tgetControlPointsArray: function ( /* optionalTarget */ ) {\n\n\t\tconsole.error( 'THREE.Spline: .getControlPointsArray() has been removed.' );\n\n\t},\n\treparametrizeByArcLength: function ( /* samplingCoef */ ) {\n\n\t\tconsole.error( 'THREE.Spline: .reparametrizeByArcLength() has been removed.' );\n\n\t}\n\n} );\n\n//\n\nfunction AxisHelper( size ) {\n\n\tconsole.warn( 'THREE.AxisHelper has been renamed to THREE.AxesHelper.' );\n\treturn new AxesHelper( size );\n\n}\n\nfunction BoundingBoxHelper( object, color ) {\n\n\tconsole.warn( 'THREE.BoundingBoxHelper has been deprecated. Creating a THREE.BoxHelper instead.' );\n\treturn new BoxHelper( object, color );\n\n}\n\nfunction EdgesHelper( object, hex ) {\n\n\tconsole.warn( 'THREE.EdgesHelper has been removed. Use THREE.EdgesGeometry instead.' );\n\treturn new LineSegments( new EdgesGeometry( object.geometry ), new LineBasicMaterial( { color: hex !== undefined ? hex : 0xffffff } ) );\n\n}\n\nGridHelper.prototype.setColors = function () {\n\n\tconsole.error( 'THREE.GridHelper: setColors() has been deprecated, pass them in the constructor instead.' );\n\n};\n\nSkeletonHelper.prototype.update = function () {\n\n\tconsole.error( 'THREE.SkeletonHelper: update() no longer needs to be called.' );\n\n};\n\nfunction WireframeHelper( object, hex ) {\n\n\tconsole.warn( 'THREE.WireframeHelper has been removed. Use THREE.WireframeGeometry instead.' );\n\treturn new LineSegments( new WireframeGeometry( object.geometry ), new LineBasicMaterial( { color: hex !== undefined ? hex : 0xffffff } ) );\n\n}\n\n//\n\nObject.assign( Loader.prototype, {\n\n\textractUrlBase: function ( url ) {\n\n\t\tconsole.warn( 'THREE.Loader: .extractUrlBase() has been deprecated. Use THREE.LoaderUtils.extractUrlBase() instead.' );\n\t\treturn LoaderUtils.extractUrlBase( url );\n\n\t}\n\n} );\n\nLoader.Handlers = {\n\n\tadd: function ( /* regex, loader */ ) {\n\n\t\tconsole.error( 'THREE.Loader: Handlers.add() has been removed. Use LoadingManager.addHandler() instead.' );\n\n\t},\n\n\tget: function ( /* file */ ) {\n\n\t\tconsole.error( 'THREE.Loader: Handlers.get() has been removed. Use LoadingManager.getHandler() instead.' );\n\n\t}\n\n};\n\nfunction XHRLoader( manager ) {\n\n\tconsole.warn( 'THREE.XHRLoader has been renamed to THREE.FileLoader.' );\n\treturn new FileLoader( manager );\n\n}\n\nfunction BinaryTextureLoader( manager ) {\n\n\tconsole.warn( 'THREE.BinaryTextureLoader has been renamed to THREE.DataTextureLoader.' );\n\treturn new DataTextureLoader( manager );\n\n}\n\n//\n\nObject.assign( Box2.prototype, {\n\n\tcenter: function ( optionalTarget ) {\n\n\t\tconsole.warn( 'THREE.Box2: .center() has been renamed to .getCenter().' );\n\t\treturn this.getCenter( optionalTarget );\n\n\t},\n\tempty: function () {\n\n\t\tconsole.warn( 'THREE.Box2: .empty() has been renamed to .isEmpty().' );\n\t\treturn this.isEmpty();\n\n\t},\n\tisIntersectionBox: function ( box ) {\n\n\t\tconsole.warn( 'THREE.Box2: .isIntersectionBox() has been renamed to .intersectsBox().' );\n\t\treturn this.intersectsBox( box );\n\n\t},\n\tsize: function ( optionalTarget ) {\n\n\t\tconsole.warn( 'THREE.Box2: .size() has been renamed to .getSize().' );\n\t\treturn this.getSize( optionalTarget );\n\n\t}\n} );\n\nObject.assign( Box3.prototype, {\n\n\tcenter: function ( optionalTarget ) {\n\n\t\tconsole.warn( 'THREE.Box3: .center() has been renamed to .getCenter().' );\n\t\treturn this.getCenter( optionalTarget );\n\n\t},\n\tempty: function () {\n\n\t\tconsole.warn( 'THREE.Box3: .empty() has been renamed to .isEmpty().' );\n\t\treturn this.isEmpty();\n\n\t},\n\tisIntersectionBox: function ( box ) {\n\n\t\tconsole.warn( 'THREE.Box3: .isIntersectionBox() has been renamed to .intersectsBox().' );\n\t\treturn this.intersectsBox( box );\n\n\t},\n\tisIntersectionSphere: function ( sphere ) {\n\n\t\tconsole.warn( 'THREE.Box3: .isIntersectionSphere() has been renamed to .intersectsSphere().' );\n\t\treturn this.intersectsSphere( sphere );\n\n\t},\n\tsize: function ( optionalTarget ) {\n\n\t\tconsole.warn( 'THREE.Box3: .size() has been renamed to .getSize().' );\n\t\treturn this.getSize( optionalTarget );\n\n\t}\n} );\n\nObject.assign( Sphere.prototype, {\n\n\tempty: function () {\n\n\t\tconsole.warn( 'THREE.Sphere: .empty() has been renamed to .isEmpty().' );\n\t\treturn this.isEmpty();\n\n\t},\n\n} );\n\nFrustum.prototype.setFromMatrix = function ( m ) {\n\n\tconsole.warn( 'THREE.Frustum: .setFromMatrix() has been renamed to .setFromProjectionMatrix().' );\n\treturn this.setFromProjectionMatrix( m );\n\n};\n\nLine3.prototype.center = function ( optionalTarget ) {\n\n\tconsole.warn( 'THREE.Line3: .center() has been renamed to .getCenter().' );\n\treturn this.getCenter( optionalTarget );\n\n};\n\nObject.assign( MathUtils, {\n\n\trandom16: function () {\n\n\t\tconsole.warn( 'THREE.Math: .random16() has been deprecated. Use Math.random() instead.' );\n\t\treturn Math.random();\n\n\t},\n\n\tnearestPowerOfTwo: function ( value ) {\n\n\t\tconsole.warn( 'THREE.Math: .nearestPowerOfTwo() has been renamed to .floorPowerOfTwo().' );\n\t\treturn MathUtils.floorPowerOfTwo( value );\n\n\t},\n\n\tnextPowerOfTwo: function ( value ) {\n\n\t\tconsole.warn( 'THREE.Math: .nextPowerOfTwo() has been renamed to .ceilPowerOfTwo().' );\n\t\treturn MathUtils.ceilPowerOfTwo( value );\n\n\t}\n\n} );\n\nObject.assign( Matrix3.prototype, {\n\n\tflattenToArrayOffset: function ( array, offset ) {\n\n\t\tconsole.warn( 'THREE.Matrix3: .flattenToArrayOffset() has been deprecated. Use .toArray() instead.' );\n\t\treturn this.toArray( array, offset );\n\n\t},\n\tmultiplyVector3: function ( vector ) {\n\n\t\tconsole.warn( 'THREE.Matrix3: .multiplyVector3() has been removed. Use vector.applyMatrix3( matrix ) instead.' );\n\t\treturn vector.applyMatrix3( this );\n\n\t},\n\tmultiplyVector3Array: function ( /* a */ ) {\n\n\t\tconsole.error( 'THREE.Matrix3: .multiplyVector3Array() has been removed.' );\n\n\t},\n\tapplyToBufferAttribute: function ( attribute ) {\n\n\t\tconsole.warn( 'THREE.Matrix3: .applyToBufferAttribute() has been removed. Use attribute.applyMatrix3( matrix ) instead.' );\n\t\treturn attribute.applyMatrix3( this );\n\n\t},\n\tapplyToVector3Array: function ( /* array, offset, length */ ) {\n\n\t\tconsole.error( 'THREE.Matrix3: .applyToVector3Array() has been removed.' );\n\n\t},\n\tgetInverse: function ( matrix ) {\n\n\t\tconsole.warn( 'THREE.Matrix3: .getInverse() has been removed. Use matrixInv.copy( matrix ).invert(); instead.' );\n\t\treturn this.copy( matrix ).invert();\n\n\t}\n\n} );\n\nObject.assign( Matrix4.prototype, {\n\n\textractPosition: function ( m ) {\n\n\t\tconsole.warn( 'THREE.Matrix4: .extractPosition() has been renamed to .copyPosition().' );\n\t\treturn this.copyPosition( m );\n\n\t},\n\tflattenToArrayOffset: function ( array, offset ) {\n\n\t\tconsole.warn( 'THREE.Matrix4: .flattenToArrayOffset() has been deprecated. Use .toArray() instead.' );\n\t\treturn this.toArray( array, offset );\n\n\t},\n\tgetPosition: function () {\n\n\t\tconsole.warn( 'THREE.Matrix4: .getPosition() has been removed. Use Vector3.setFromMatrixPosition( matrix ) instead.' );\n\t\treturn new Vector3().setFromMatrixColumn( this, 3 );\n\n\t},\n\tsetRotationFromQuaternion: function ( q ) {\n\n\t\tconsole.warn( 'THREE.Matrix4: .setRotationFromQuaternion() has been renamed to .makeRotationFromQuaternion().' );\n\t\treturn this.makeRotationFromQuaternion( q );\n\n\t},\n\tmultiplyToArray: function () {\n\n\t\tconsole.warn( 'THREE.Matrix4: .multiplyToArray() has been removed.' );\n\n\t},\n\tmultiplyVector3: function ( vector ) {\n\n\t\tconsole.warn( 'THREE.Matrix4: .multiplyVector3() has been removed. Use vector.applyMatrix4( matrix ) instead.' );\n\t\treturn vector.applyMatrix4( this );\n\n\t},\n\tmultiplyVector4: function ( vector ) {\n\n\t\tconsole.warn( 'THREE.Matrix4: .multiplyVector4() has been removed. Use vector.applyMatrix4( matrix ) instead.' );\n\t\treturn vector.applyMatrix4( this );\n\n\t},\n\tmultiplyVector3Array: function ( /* a */ ) {\n\n\t\tconsole.error( 'THREE.Matrix4: .multiplyVector3Array() has been removed.' );\n\n\t},\n\trotateAxis: function ( v ) {\n\n\t\tconsole.warn( 'THREE.Matrix4: .rotateAxis() has been removed. Use Vector3.transformDirection( matrix ) instead.' );\n\t\tv.transformDirection( this );\n\n\t},\n\tcrossVector: function ( vector ) {\n\n\t\tconsole.warn( 'THREE.Matrix4: .crossVector() has been removed. Use vector.applyMatrix4( matrix ) instead.' );\n\t\treturn vector.applyMatrix4( this );\n\n\t},\n\ttranslate: function () {\n\n\t\tconsole.error( 'THREE.Matrix4: .translate() has been removed.' );\n\n\t},\n\trotateX: function () {\n\n\t\tconsole.error( 'THREE.Matrix4: .rotateX() has been removed.' );\n\n\t},\n\trotateY: function () {\n\n\t\tconsole.error( 'THREE.Matrix4: .rotateY() has been removed.' );\n\n\t},\n\trotateZ: function () {\n\n\t\tconsole.error( 'THREE.Matrix4: .rotateZ() has been removed.' );\n\n\t},\n\trotateByAxis: function () {\n\n\t\tconsole.error( 'THREE.Matrix4: .rotateByAxis() has been removed.' );\n\n\t},\n\tapplyToBufferAttribute: function ( attribute ) {\n\n\t\tconsole.warn( 'THREE.Matrix4: .applyToBufferAttribute() has been removed. Use attribute.applyMatrix4( matrix ) instead.' );\n\t\treturn attribute.applyMatrix4( this );\n\n\t},\n\tapplyToVector3Array: function ( /* array, offset, length */ ) {\n\n\t\tconsole.error( 'THREE.Matrix4: .applyToVector3Array() has been removed.' );\n\n\t},\n\tmakeFrustum: function ( left, right, bottom, top, near, far ) {\n\n\t\tconsole.warn( 'THREE.Matrix4: .makeFrustum() has been removed. Use .makePerspective( left, right, top, bottom, near, far ) instead.' );\n\t\treturn this.makePerspective( left, right, top, bottom, near, far );\n\n\t},\n\tgetInverse: function ( matrix ) {\n\n\t\tconsole.warn( 'THREE.Matrix4: .getInverse() has been removed. Use matrixInv.copy( matrix ).invert(); instead.' );\n\t\treturn this.copy( matrix ).invert();\n\n\t}\n\n} );\n\nPlane.prototype.isIntersectionLine = function ( line ) {\n\n\tconsole.warn( 'THREE.Plane: .isIntersectionLine() has been renamed to .intersectsLine().' );\n\treturn this.intersectsLine( line );\n\n};\n\nObject.assign( Quaternion.prototype, {\n\n\tmultiplyVector3: function ( vector ) {\n\n\t\tconsole.warn( 'THREE.Quaternion: .multiplyVector3() has been removed. Use is now vector.applyQuaternion( quaternion ) instead.' );\n\t\treturn vector.applyQuaternion( this );\n\n\t},\n\tinverse: function ( ) {\n\n\t\tconsole.warn( 'THREE.Quaternion: .inverse() has been renamed to invert().' );\n\t\treturn this.invert();\n\n\t}\n\n} );\n\nObject.assign( Ray.prototype, {\n\n\tisIntersectionBox: function ( box ) {\n\n\t\tconsole.warn( 'THREE.Ray: .isIntersectionBox() has been renamed to .intersectsBox().' );\n\t\treturn this.intersectsBox( box );\n\n\t},\n\tisIntersectionPlane: function ( plane ) {\n\n\t\tconsole.warn( 'THREE.Ray: .isIntersectionPlane() has been renamed to .intersectsPlane().' );\n\t\treturn this.intersectsPlane( plane );\n\n\t},\n\tisIntersectionSphere: function ( sphere ) {\n\n\t\tconsole.warn( 'THREE.Ray: .isIntersectionSphere() has been renamed to .intersectsSphere().' );\n\t\treturn this.intersectsSphere( sphere );\n\n\t}\n\n} );\n\nObject.assign( Triangle.prototype, {\n\n\tarea: function () {\n\n\t\tconsole.warn( 'THREE.Triangle: .area() has been renamed to .getArea().' );\n\t\treturn this.getArea();\n\n\t},\n\tbarycoordFromPoint: function ( point, target ) {\n\n\t\tconsole.warn( 'THREE.Triangle: .barycoordFromPoint() has been renamed to .getBarycoord().' );\n\t\treturn this.getBarycoord( point, target );\n\n\t},\n\tmidpoint: function ( target ) {\n\n\t\tconsole.warn( 'THREE.Triangle: .midpoint() has been renamed to .getMidpoint().' );\n\t\treturn this.getMidpoint( target );\n\n\t},\n\tnormal: function ( target ) {\n\n\t\tconsole.warn( 'THREE.Triangle: .normal() has been renamed to .getNormal().' );\n\t\treturn this.getNormal( target );\n\n\t},\n\tplane: function ( target ) {\n\n\t\tconsole.warn( 'THREE.Triangle: .plane() has been renamed to .getPlane().' );\n\t\treturn this.getPlane( target );\n\n\t}\n\n} );\n\nObject.assign( Triangle, {\n\n\tbarycoordFromPoint: function ( point, a, b, c, target ) {\n\n\t\tconsole.warn( 'THREE.Triangle: .barycoordFromPoint() has been renamed to .getBarycoord().' );\n\t\treturn Triangle.getBarycoord( point, a, b, c, target );\n\n\t},\n\tnormal: function ( a, b, c, target ) {\n\n\t\tconsole.warn( 'THREE.Triangle: .normal() has been renamed to .getNormal().' );\n\t\treturn Triangle.getNormal( a, b, c, target );\n\n\t}\n\n} );\n\nObject.assign( Shape.prototype, {\n\n\textractAllPoints: function ( divisions ) {\n\n\t\tconsole.warn( 'THREE.Shape: .extractAllPoints() has been removed. Use .extractPoints() instead.' );\n\t\treturn this.extractPoints( divisions );\n\n\t},\n\textrude: function ( options ) {\n\n\t\tconsole.warn( 'THREE.Shape: .extrude() has been removed. Use ExtrudeGeometry() instead.' );\n\t\treturn new ExtrudeGeometry( this, options );\n\n\t},\n\tmakeGeometry: function ( options ) {\n\n\t\tconsole.warn( 'THREE.Shape: .makeGeometry() has been removed. Use ShapeGeometry() instead.' );\n\t\treturn new ShapeGeometry( this, options );\n\n\t}\n\n} );\n\nObject.assign( Vector2.prototype, {\n\n\tfromAttribute: function ( attribute, index, offset ) {\n\n\t\tconsole.warn( 'THREE.Vector2: .fromAttribute() has been renamed to .fromBufferAttribute().' );\n\t\treturn this.fromBufferAttribute( attribute, index, offset );\n\n\t},\n\tdistanceToManhattan: function ( v ) {\n\n\t\tconsole.warn( 'THREE.Vector2: .distanceToManhattan() has been renamed to .manhattanDistanceTo().' );\n\t\treturn this.manhattanDistanceTo( v );\n\n\t},\n\tlengthManhattan: function () {\n\n\t\tconsole.warn( 'THREE.Vector2: .lengthManhattan() has been renamed to .manhattanLength().' );\n\t\treturn this.manhattanLength();\n\n\t}\n\n} );\n\nObject.assign( Vector3.prototype, {\n\n\tsetEulerFromRotationMatrix: function () {\n\n\t\tconsole.error( 'THREE.Vector3: .setEulerFromRotationMatrix() has been removed. Use Euler.setFromRotationMatrix() instead.' );\n\n\t},\n\tsetEulerFromQuaternion: function () {\n\n\t\tconsole.error( 'THREE.Vector3: .setEulerFromQuaternion() has been removed. Use Euler.setFromQuaternion() instead.' );\n\n\t},\n\tgetPositionFromMatrix: function ( m ) {\n\n\t\tconsole.warn( 'THREE.Vector3: .getPositionFromMatrix() has been renamed to .setFromMatrixPosition().' );\n\t\treturn this.setFromMatrixPosition( m );\n\n\t},\n\tgetScaleFromMatrix: function ( m ) {\n\n\t\tconsole.warn( 'THREE.Vector3: .getScaleFromMatrix() has been renamed to .setFromMatrixScale().' );\n\t\treturn this.setFromMatrixScale( m );\n\n\t},\n\tgetColumnFromMatrix: function ( index, matrix ) {\n\n\t\tconsole.warn( 'THREE.Vector3: .getColumnFromMatrix() has been renamed to .setFromMatrixColumn().' );\n\t\treturn this.setFromMatrixColumn( matrix, index );\n\n\t},\n\tapplyProjection: function ( m ) {\n\n\t\tconsole.warn( 'THREE.Vector3: .applyProjection() has been removed. Use .applyMatrix4( m ) instead.' );\n\t\treturn this.applyMatrix4( m );\n\n\t},\n\tfromAttribute: function ( attribute, index, offset ) {\n\n\t\tconsole.warn( 'THREE.Vector3: .fromAttribute() has been renamed to .fromBufferAttribute().' );\n\t\treturn this.fromBufferAttribute( attribute, index, offset );\n\n\t},\n\tdistanceToManhattan: function ( v ) {\n\n\t\tconsole.warn( 'THREE.Vector3: .distanceToManhattan() has been renamed to .manhattanDistanceTo().' );\n\t\treturn this.manhattanDistanceTo( v );\n\n\t},\n\tlengthManhattan: function () {\n\n\t\tconsole.warn( 'THREE.Vector3: .lengthManhattan() has been renamed to .manhattanLength().' );\n\t\treturn this.manhattanLength();\n\n\t}\n\n} );\n\nObject.assign( Vector4.prototype, {\n\n\tfromAttribute: function ( attribute, index, offset ) {\n\n\t\tconsole.warn( 'THREE.Vector4: .fromAttribute() has been renamed to .fromBufferAttribute().' );\n\t\treturn this.fromBufferAttribute( attribute, index, offset );\n\n\t},\n\tlengthManhattan: function () {\n\n\t\tconsole.warn( 'THREE.Vector4: .lengthManhattan() has been renamed to .manhattanLength().' );\n\t\treturn this.manhattanLength();\n\n\t}\n\n} );\n\n//\n\nObject.assign( Object3D.prototype, {\n\n\tgetChildByName: function ( name ) {\n\n\t\tconsole.warn( 'THREE.Object3D: .getChildByName() has been renamed to .getObjectByName().' );\n\t\treturn this.getObjectByName( name );\n\n\t},\n\trenderDepth: function () {\n\n\t\tconsole.warn( 'THREE.Object3D: .renderDepth has been removed. Use .renderOrder, instead.' );\n\n\t},\n\ttranslate: function ( distance, axis ) {\n\n\t\tconsole.warn( 'THREE.Object3D: .translate() has been removed. Use .translateOnAxis( axis, distance ) instead.' );\n\t\treturn this.translateOnAxis( axis, distance );\n\n\t},\n\tgetWorldRotation: function () {\n\n\t\tconsole.error( 'THREE.Object3D: .getWorldRotation() has been removed. Use THREE.Object3D.getWorldQuaternion( target ) instead.' );\n\n\t},\n\tapplyMatrix: function ( matrix ) {\n\n\t\tconsole.warn( 'THREE.Object3D: .applyMatrix() has been renamed to .applyMatrix4().' );\n\t\treturn this.applyMatrix4( matrix );\n\n\t}\n\n} );\n\nObject.defineProperties( Object3D.prototype, {\n\n\teulerOrder: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.Object3D: .eulerOrder is now .rotation.order.' );\n\t\t\treturn this.rotation.order;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.Object3D: .eulerOrder is now .rotation.order.' );\n\t\t\tthis.rotation.order = value;\n\n\t\t}\n\t},\n\tuseQuaternion: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.Object3D: .useQuaternion has been removed. The library now uses quaternions by default.' );\n\n\t\t},\n\t\tset: function () {\n\n\t\t\tconsole.warn( 'THREE.Object3D: .useQuaternion has been removed. The library now uses quaternions by default.' );\n\n\t\t}\n\t}\n\n} );\n\nObject.assign( Mesh.prototype, {\n\n\tsetDrawMode: function () {\n\n\t\tconsole.error( 'THREE.Mesh: .setDrawMode() has been removed. The renderer now always assumes THREE.TrianglesDrawMode. Transform your geometry via BufferGeometryUtils.toTrianglesDrawMode() if necessary.' );\n\n\t},\n\n} );\n\nObject.defineProperties( Mesh.prototype, {\n\n\tdrawMode: {\n\t\tget: function () {\n\n\t\t\tconsole.error( 'THREE.Mesh: .drawMode has been removed. The renderer now always assumes THREE.TrianglesDrawMode.' );\n\t\t\treturn TrianglesDrawMode;\n\n\t\t},\n\t\tset: function () {\n\n\t\t\tconsole.error( 'THREE.Mesh: .drawMode has been removed. The renderer now always assumes THREE.TrianglesDrawMode. Transform your geometry via BufferGeometryUtils.toTrianglesDrawMode() if necessary.' );\n\n\t\t}\n\t}\n\n} );\n\nObject.defineProperties( LOD.prototype, {\n\n\tobjects: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.LOD: .objects has been renamed to .levels.' );\n\t\t\treturn this.levels;\n\n\t\t}\n\t}\n\n} );\n\nObject.defineProperty( Skeleton.prototype, 'useVertexTexture', {\n\n\tget: function () {\n\n\t\tconsole.warn( 'THREE.Skeleton: useVertexTexture has been removed.' );\n\n\t},\n\tset: function () {\n\n\t\tconsole.warn( 'THREE.Skeleton: useVertexTexture has been removed.' );\n\n\t}\n\n} );\n\nSkinnedMesh.prototype.initBones = function () {\n\n\tconsole.error( 'THREE.SkinnedMesh: initBones() has been removed.' );\n\n};\n\nObject.defineProperty( Curve.prototype, '__arcLengthDivisions', {\n\n\tget: function () {\n\n\t\tconsole.warn( 'THREE.Curve: .__arcLengthDivisions is now .arcLengthDivisions.' );\n\t\treturn this.arcLengthDivisions;\n\n\t},\n\tset: function ( value ) {\n\n\t\tconsole.warn( 'THREE.Curve: .__arcLengthDivisions is now .arcLengthDivisions.' );\n\t\tthis.arcLengthDivisions = value;\n\n\t}\n\n} );\n\n//\n\nPerspectiveCamera.prototype.setLens = function ( focalLength, filmGauge ) {\n\n\tconsole.warn( 'THREE.PerspectiveCamera.setLens is deprecated. ' +\n\t\t\t'Use .setFocalLength and .filmGauge for a photographic setup.' );\n\n\tif ( filmGauge !== undefined ) this.filmGauge = filmGauge;\n\tthis.setFocalLength( focalLength );\n\n};\n\n//\n\nObject.defineProperties( Light.prototype, {\n\tonlyShadow: {\n\t\tset: function () {\n\n\t\t\tconsole.warn( 'THREE.Light: .onlyShadow has been removed.' );\n\n\t\t}\n\t},\n\tshadowCameraFov: {\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.Light: .shadowCameraFov is now .shadow.camera.fov.' );\n\t\t\tthis.shadow.camera.fov = value;\n\n\t\t}\n\t},\n\tshadowCameraLeft: {\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.Light: .shadowCameraLeft is now .shadow.camera.left.' );\n\t\t\tthis.shadow.camera.left = value;\n\n\t\t}\n\t},\n\tshadowCameraRight: {\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.Light: .shadowCameraRight is now .shadow.camera.right.' );\n\t\t\tthis.shadow.camera.right = value;\n\n\t\t}\n\t},\n\tshadowCameraTop: {\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.Light: .shadowCameraTop is now .shadow.camera.top.' );\n\t\t\tthis.shadow.camera.top = value;\n\n\t\t}\n\t},\n\tshadowCameraBottom: {\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.Light: .shadowCameraBottom is now .shadow.camera.bottom.' );\n\t\t\tthis.shadow.camera.bottom = value;\n\n\t\t}\n\t},\n\tshadowCameraNear: {\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.Light: .shadowCameraNear is now .shadow.camera.near.' );\n\t\t\tthis.shadow.camera.near = value;\n\n\t\t}\n\t},\n\tshadowCameraFar: {\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.Light: .shadowCameraFar is now .shadow.camera.far.' );\n\t\t\tthis.shadow.camera.far = value;\n\n\t\t}\n\t},\n\tshadowCameraVisible: {\n\t\tset: function () {\n\n\t\t\tconsole.warn( 'THREE.Light: .shadowCameraVisible has been removed. Use new THREE.CameraHelper( light.shadow.camera ) instead.' );\n\n\t\t}\n\t},\n\tshadowBias: {\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.Light: .shadowBias is now .shadow.bias.' );\n\t\t\tthis.shadow.bias = value;\n\n\t\t}\n\t},\n\tshadowDarkness: {\n\t\tset: function () {\n\n\t\t\tconsole.warn( 'THREE.Light: .shadowDarkness has been removed.' );\n\n\t\t}\n\t},\n\tshadowMapWidth: {\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.Light: .shadowMapWidth is now .shadow.mapSize.width.' );\n\t\t\tthis.shadow.mapSize.width = value;\n\n\t\t}\n\t},\n\tshadowMapHeight: {\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.Light: .shadowMapHeight is now .shadow.mapSize.height.' );\n\t\t\tthis.shadow.mapSize.height = value;\n\n\t\t}\n\t}\n} );\n\n//\n\nObject.defineProperties( BufferAttribute.prototype, {\n\n\tlength: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.BufferAttribute: .length has been deprecated. Use .count instead.' );\n\t\t\treturn this.array.length;\n\n\t\t}\n\t},\n\tdynamic: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.BufferAttribute: .dynamic has been deprecated. Use .usage instead.' );\n\t\t\treturn this.usage === DynamicDrawUsage;\n\n\t\t},\n\t\tset: function ( /* value */ ) {\n\n\t\t\tconsole.warn( 'THREE.BufferAttribute: .dynamic has been deprecated. Use .usage instead.' );\n\t\t\tthis.setUsage( DynamicDrawUsage );\n\n\t\t}\n\t}\n\n} );\n\nObject.assign( BufferAttribute.prototype, {\n\tsetDynamic: function ( value ) {\n\n\t\tconsole.warn( 'THREE.BufferAttribute: .setDynamic() has been deprecated. Use .setUsage() instead.' );\n\t\tthis.setUsage( value === true ? DynamicDrawUsage : StaticDrawUsage );\n\t\treturn this;\n\n\t},\n\tcopyIndicesArray: function ( /* indices */ ) {\n\n\t\tconsole.error( 'THREE.BufferAttribute: .copyIndicesArray() has been removed.' );\n\n\t},\n\tsetArray: function ( /* array */ ) {\n\n\t\tconsole.error( 'THREE.BufferAttribute: .setArray has been removed. Use BufferGeometry .setAttribute to replace/resize attribute buffers' );\n\n\t}\n} );\n\nObject.assign( BufferGeometry.prototype, {\n\n\taddIndex: function ( index ) {\n\n\t\tconsole.warn( 'THREE.BufferGeometry: .addIndex() has been renamed to .setIndex().' );\n\t\tthis.setIndex( index );\n\n\t},\n\taddAttribute: function ( name, attribute ) {\n\n\t\tconsole.warn( 'THREE.BufferGeometry: .addAttribute() has been renamed to .setAttribute().' );\n\n\t\tif ( ! ( attribute && attribute.isBufferAttribute ) && ! ( attribute && attribute.isInterleavedBufferAttribute ) ) {\n\n\t\t\tconsole.warn( 'THREE.BufferGeometry: .addAttribute() now expects ( name, attribute ).' );\n\n\t\t\treturn this.setAttribute( name, new BufferAttribute( arguments[ 1 ], arguments[ 2 ] ) );\n\n\t\t}\n\n\t\tif ( name === 'index' ) {\n\n\t\t\tconsole.warn( 'THREE.BufferGeometry.addAttribute: Use .setIndex() for index attribute.' );\n\t\t\tthis.setIndex( attribute );\n\n\t\t\treturn this;\n\n\t\t}\n\n\t\treturn this.setAttribute( name, attribute );\n\n\t},\n\taddDrawCall: function ( start, count, indexOffset ) {\n\n\t\tif ( indexOffset !== undefined ) {\n\n\t\t\tconsole.warn( 'THREE.BufferGeometry: .addDrawCall() no longer supports indexOffset.' );\n\n\t\t}\n\n\t\tconsole.warn( 'THREE.BufferGeometry: .addDrawCall() is now .addGroup().' );\n\t\tthis.addGroup( start, count );\n\n\t},\n\tclearDrawCalls: function () {\n\n\t\tconsole.warn( 'THREE.BufferGeometry: .clearDrawCalls() is now .clearGroups().' );\n\t\tthis.clearGroups();\n\n\t},\n\tcomputeOffsets: function () {\n\n\t\tconsole.warn( 'THREE.BufferGeometry: .computeOffsets() has been removed.' );\n\n\t},\n\tremoveAttribute: function ( name ) {\n\n\t\tconsole.warn( 'THREE.BufferGeometry: .removeAttribute() has been renamed to .deleteAttribute().' );\n\n\t\treturn this.deleteAttribute( name );\n\n\t},\n\tapplyMatrix: function ( matrix ) {\n\n\t\tconsole.warn( 'THREE.BufferGeometry: .applyMatrix() has been renamed to .applyMatrix4().' );\n\t\treturn this.applyMatrix4( matrix );\n\n\t}\n\n} );\n\nObject.defineProperties( BufferGeometry.prototype, {\n\n\tdrawcalls: {\n\t\tget: function () {\n\n\t\t\tconsole.error( 'THREE.BufferGeometry: .drawcalls has been renamed to .groups.' );\n\t\t\treturn this.groups;\n\n\t\t}\n\t},\n\toffsets: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.BufferGeometry: .offsets has been renamed to .groups.' );\n\t\t\treturn this.groups;\n\n\t\t}\n\t}\n\n} );\n\nObject.defineProperties( InstancedBufferGeometry.prototype, {\n\n\tmaxInstancedCount: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.InstancedBufferGeometry: .maxInstancedCount has been renamed to .instanceCount.' );\n\t\t\treturn this.instanceCount;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.InstancedBufferGeometry: .maxInstancedCount has been renamed to .instanceCount.' );\n\t\t\tthis.instanceCount = value;\n\n\t\t}\n\t}\n\n} );\n\nObject.defineProperties( Raycaster.prototype, {\n\n\tlinePrecision: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.Raycaster: .linePrecision has been deprecated. Use .params.Line.threshold instead.' );\n\t\t\treturn this.params.Line.threshold;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.Raycaster: .linePrecision has been deprecated. Use .params.Line.threshold instead.' );\n\t\t\tthis.params.Line.threshold = value;\n\n\t\t}\n\t}\n\n} );\n\nObject.defineProperties( InterleavedBuffer.prototype, {\n\n\tdynamic: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.InterleavedBuffer: .length has been deprecated. Use .usage instead.' );\n\t\t\treturn this.usage === DynamicDrawUsage;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.InterleavedBuffer: .length has been deprecated. Use .usage instead.' );\n\t\t\tthis.setUsage( value );\n\n\t\t}\n\t}\n\n} );\n\nObject.assign( InterleavedBuffer.prototype, {\n\tsetDynamic: function ( value ) {\n\n\t\tconsole.warn( 'THREE.InterleavedBuffer: .setDynamic() has been deprecated. Use .setUsage() instead.' );\n\t\tthis.setUsage( value === true ? DynamicDrawUsage : StaticDrawUsage );\n\t\treturn this;\n\n\t},\n\tsetArray: function ( /* array */ ) {\n\n\t\tconsole.error( 'THREE.InterleavedBuffer: .setArray has been removed. Use BufferGeometry .setAttribute to replace/resize attribute buffers' );\n\n\t}\n} );\n\n//\n\nObject.assign( ExtrudeGeometry.prototype, {\n\n\tgetArrays: function () {\n\n\t\tconsole.error( 'THREE.ExtrudeGeometry: .getArrays() has been removed.' );\n\n\t},\n\n\taddShapeList: function () {\n\n\t\tconsole.error( 'THREE.ExtrudeGeometry: .addShapeList() has been removed.' );\n\n\t},\n\n\taddShape: function () {\n\n\t\tconsole.error( 'THREE.ExtrudeGeometry: .addShape() has been removed.' );\n\n\t}\n\n} );\n\n//\n\nObject.assign( Scene.prototype, {\n\n\tdispose: function () {\n\n\t\tconsole.error( 'THREE.Scene: .dispose() has been removed.' );\n\n\t}\n\n} );\n\n//\n\nObject.defineProperties( Uniform.prototype, {\n\n\tdynamic: {\n\t\tset: function () {\n\n\t\t\tconsole.warn( 'THREE.Uniform: .dynamic has been removed. Use object.onBeforeRender() instead.' );\n\n\t\t}\n\t},\n\tonUpdate: {\n\t\tvalue: function () {\n\n\t\t\tconsole.warn( 'THREE.Uniform: .onUpdate() has been removed. Use object.onBeforeRender() instead.' );\n\t\t\treturn this;\n\n\t\t}\n\t}\n\n} );\n\n//\n\nObject.defineProperties( Material.prototype, {\n\n\twrapAround: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.Material: .wrapAround has been removed.' );\n\n\t\t},\n\t\tset: function () {\n\n\t\t\tconsole.warn( 'THREE.Material: .wrapAround has been removed.' );\n\n\t\t}\n\t},\n\n\toverdraw: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.Material: .overdraw has been removed.' );\n\n\t\t},\n\t\tset: function () {\n\n\t\t\tconsole.warn( 'THREE.Material: .overdraw has been removed.' );\n\n\t\t}\n\t},\n\n\twrapRGB: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.Material: .wrapRGB has been removed.' );\n\t\t\treturn new Color();\n\n\t\t}\n\t},\n\n\tshading: {\n\t\tget: function () {\n\n\t\t\tconsole.error( 'THREE.' + this.type + ': .shading has been removed. Use the boolean .flatShading instead.' );\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.' + this.type + ': .shading has been removed. Use the boolean .flatShading instead.' );\n\t\t\tthis.flatShading = ( value === FlatShading );\n\n\t\t}\n\t},\n\n\tstencilMask: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.' + this.type + ': .stencilMask has been removed. Use .stencilFuncMask instead.' );\n\t\t\treturn this.stencilFuncMask;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.' + this.type + ': .stencilMask has been removed. Use .stencilFuncMask instead.' );\n\t\t\tthis.stencilFuncMask = value;\n\n\t\t}\n\t}\n\n} );\n\nObject.defineProperties( MeshPhongMaterial.prototype, {\n\n\tmetal: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.MeshPhongMaterial: .metal has been removed. Use THREE.MeshStandardMaterial instead.' );\n\t\t\treturn false;\n\n\t\t},\n\t\tset: function () {\n\n\t\t\tconsole.warn( 'THREE.MeshPhongMaterial: .metal has been removed. Use THREE.MeshStandardMaterial instead' );\n\n\t\t}\n\t}\n\n} );\n\nObject.defineProperties( MeshPhysicalMaterial.prototype, {\n\n\ttransparency: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.MeshPhysicalMaterial: .transparency has been renamed to .transmission.' );\n\t\t\treturn this.transmission;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.MeshPhysicalMaterial: .transparency has been renamed to .transmission.' );\n\t\t\tthis.transmission = value;\n\n\t\t}\n\t}\n\n} );\n\nObject.defineProperties( ShaderMaterial.prototype, {\n\n\tderivatives: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.ShaderMaterial: .derivatives has been moved to .extensions.derivatives.' );\n\t\t\treturn this.extensions.derivatives;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE. ShaderMaterial: .derivatives has been moved to .extensions.derivatives.' );\n\t\t\tthis.extensions.derivatives = value;\n\n\t\t}\n\t}\n\n} );\n\n//\n\nObject.assign( WebGLRenderer.prototype, {\n\n\tclearTarget: function ( renderTarget, color, depth, stencil ) {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .clearTarget() has been deprecated. Use .setRenderTarget() and .clear() instead.' );\n\t\tthis.setRenderTarget( renderTarget );\n\t\tthis.clear( color, depth, stencil );\n\n\t},\n\tanimate: function ( callback ) {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .animate() is now .setAnimationLoop().' );\n\t\tthis.setAnimationLoop( callback );\n\n\t},\n\tgetCurrentRenderTarget: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .getCurrentRenderTarget() is now .getRenderTarget().' );\n\t\treturn this.getRenderTarget();\n\n\t},\n\tgetMaxAnisotropy: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .getMaxAnisotropy() is now .capabilities.getMaxAnisotropy().' );\n\t\treturn this.capabilities.getMaxAnisotropy();\n\n\t},\n\tgetPrecision: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .getPrecision() is now .capabilities.precision.' );\n\t\treturn this.capabilities.precision;\n\n\t},\n\tresetGLState: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .resetGLState() is now .state.reset().' );\n\t\treturn this.state.reset();\n\n\t},\n\tsupportsFloatTextures: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .supportsFloatTextures() is now .extensions.get( \\'OES_texture_float\\' ).' );\n\t\treturn this.extensions.get( 'OES_texture_float' );\n\n\t},\n\tsupportsHalfFloatTextures: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .supportsHalfFloatTextures() is now .extensions.get( \\'OES_texture_half_float\\' ).' );\n\t\treturn this.extensions.get( 'OES_texture_half_float' );\n\n\t},\n\tsupportsStandardDerivatives: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .supportsStandardDerivatives() is now .extensions.get( \\'OES_standard_derivatives\\' ).' );\n\t\treturn this.extensions.get( 'OES_standard_derivatives' );\n\n\t},\n\tsupportsCompressedTextureS3TC: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .supportsCompressedTextureS3TC() is now .extensions.get( \\'WEBGL_compressed_texture_s3tc\\' ).' );\n\t\treturn this.extensions.get( 'WEBGL_compressed_texture_s3tc' );\n\n\t},\n\tsupportsCompressedTexturePVRTC: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .supportsCompressedTexturePVRTC() is now .extensions.get( \\'WEBGL_compressed_texture_pvrtc\\' ).' );\n\t\treturn this.extensions.get( 'WEBGL_compressed_texture_pvrtc' );\n\n\t},\n\tsupportsBlendMinMax: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .supportsBlendMinMax() is now .extensions.get( \\'EXT_blend_minmax\\' ).' );\n\t\treturn this.extensions.get( 'EXT_blend_minmax' );\n\n\t},\n\tsupportsVertexTextures: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .supportsVertexTextures() is now .capabilities.vertexTextures.' );\n\t\treturn this.capabilities.vertexTextures;\n\n\t},\n\tsupportsInstancedArrays: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .supportsInstancedArrays() is now .extensions.get( \\'ANGLE_instanced_arrays\\' ).' );\n\t\treturn this.extensions.get( 'ANGLE_instanced_arrays' );\n\n\t},\n\tenableScissorTest: function ( boolean ) {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .enableScissorTest() is now .setScissorTest().' );\n\t\tthis.setScissorTest( boolean );\n\n\t},\n\tinitMaterial: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .initMaterial() has been removed.' );\n\n\t},\n\taddPrePlugin: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .addPrePlugin() has been removed.' );\n\n\t},\n\taddPostPlugin: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .addPostPlugin() has been removed.' );\n\n\t},\n\tupdateShadowMap: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .updateShadowMap() has been removed.' );\n\n\t},\n\tsetFaceCulling: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .setFaceCulling() has been removed.' );\n\n\t},\n\tallocTextureUnit: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .allocTextureUnit() has been removed.' );\n\n\t},\n\tsetTexture: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .setTexture() has been removed.' );\n\n\t},\n\tsetTexture2D: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .setTexture2D() has been removed.' );\n\n\t},\n\tsetTextureCube: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .setTextureCube() has been removed.' );\n\n\t},\n\tgetActiveMipMapLevel: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .getActiveMipMapLevel() is now .getActiveMipmapLevel().' );\n\t\treturn this.getActiveMipmapLevel();\n\n\t}\n\n} );\n\nObject.defineProperties( WebGLRenderer.prototype, {\n\n\tshadowMapEnabled: {\n\t\tget: function () {\n\n\t\t\treturn this.shadowMap.enabled;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: .shadowMapEnabled is now .shadowMap.enabled.' );\n\t\t\tthis.shadowMap.enabled = value;\n\n\t\t}\n\t},\n\tshadowMapType: {\n\t\tget: function () {\n\n\t\t\treturn this.shadowMap.type;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: .shadowMapType is now .shadowMap.type.' );\n\t\t\tthis.shadowMap.type = value;\n\n\t\t}\n\t},\n\tshadowMapCullFace: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: .shadowMapCullFace has been removed. Set Material.shadowSide instead.' );\n\t\t\treturn undefined;\n\n\t\t},\n\t\tset: function ( /* value */ ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: .shadowMapCullFace has been removed. Set Material.shadowSide instead.' );\n\n\t\t}\n\t},\n\tcontext: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: .context has been removed. Use .getContext() instead.' );\n\t\t\treturn this.getContext();\n\n\t\t}\n\t},\n\tvr: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: .vr has been renamed to .xr' );\n\t\t\treturn this.xr;\n\n\t\t}\n\t},\n\tgammaInput: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: .gammaInput has been removed. Set the encoding for textures via Texture.encoding instead.' );\n\t\t\treturn false;\n\n\t\t},\n\t\tset: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: .gammaInput has been removed. Set the encoding for textures via Texture.encoding instead.' );\n\n\t\t}\n\t},\n\tgammaOutput: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: .gammaOutput has been removed. Set WebGLRenderer.outputEncoding instead.' );\n\t\t\treturn false;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: .gammaOutput has been removed. Set WebGLRenderer.outputEncoding instead.' );\n\t\t\tthis.outputEncoding = ( value === true ) ? sRGBEncoding : LinearEncoding;\n\n\t\t}\n\t},\n\ttoneMappingWhitePoint: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: .toneMappingWhitePoint has been removed.' );\n\t\t\treturn 1.0;\n\n\t\t},\n\t\tset: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: .toneMappingWhitePoint has been removed.' );\n\n\t\t}\n\t},\n\n} );\n\nObject.defineProperties( WebGLShadowMap.prototype, {\n\n\tcullFace: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: .shadowMap.cullFace has been removed. Set Material.shadowSide instead.' );\n\t\t\treturn undefined;\n\n\t\t},\n\t\tset: function ( /* cullFace */ ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: .shadowMap.cullFace has been removed. Set Material.shadowSide instead.' );\n\n\t\t}\n\t},\n\trenderReverseSided: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: .shadowMap.renderReverseSided has been removed. Set Material.shadowSide instead.' );\n\t\t\treturn undefined;\n\n\t\t},\n\t\tset: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: .shadowMap.renderReverseSided has been removed. Set Material.shadowSide instead.' );\n\n\t\t}\n\t},\n\trenderSingleSided: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: .shadowMap.renderSingleSided has been removed. Set Material.shadowSide instead.' );\n\t\t\treturn undefined;\n\n\t\t},\n\t\tset: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: .shadowMap.renderSingleSided has been removed. Set Material.shadowSide instead.' );\n\n\t\t}\n\t}\n\n} );\n\nfunction WebGLRenderTargetCube( width, height, options ) {\n\n\tconsole.warn( 'THREE.WebGLRenderTargetCube( width, height, options ) is now WebGLCubeRenderTarget( size, options ).' );\n\treturn new WebGLCubeRenderTarget( width, options );\n\n}\n\n//\n\nObject.defineProperties( WebGLRenderTarget.prototype, {\n\n\twrapS: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .wrapS is now .texture.wrapS.' );\n\t\t\treturn this.texture.wrapS;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .wrapS is now .texture.wrapS.' );\n\t\t\tthis.texture.wrapS = value;\n\n\t\t}\n\t},\n\twrapT: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .wrapT is now .texture.wrapT.' );\n\t\t\treturn this.texture.wrapT;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .wrapT is now .texture.wrapT.' );\n\t\t\tthis.texture.wrapT = value;\n\n\t\t}\n\t},\n\tmagFilter: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .magFilter is now .texture.magFilter.' );\n\t\t\treturn this.texture.magFilter;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .magFilter is now .texture.magFilter.' );\n\t\t\tthis.texture.magFilter = value;\n\n\t\t}\n\t},\n\tminFilter: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .minFilter is now .texture.minFilter.' );\n\t\t\treturn this.texture.minFilter;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .minFilter is now .texture.minFilter.' );\n\t\t\tthis.texture.minFilter = value;\n\n\t\t}\n\t},\n\tanisotropy: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .anisotropy is now .texture.anisotropy.' );\n\t\t\treturn this.texture.anisotropy;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .anisotropy is now .texture.anisotropy.' );\n\t\t\tthis.texture.anisotropy = value;\n\n\t\t}\n\t},\n\toffset: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .offset is now .texture.offset.' );\n\t\t\treturn this.texture.offset;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .offset is now .texture.offset.' );\n\t\t\tthis.texture.offset = value;\n\n\t\t}\n\t},\n\trepeat: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .repeat is now .texture.repeat.' );\n\t\t\treturn this.texture.repeat;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .repeat is now .texture.repeat.' );\n\t\t\tthis.texture.repeat = value;\n\n\t\t}\n\t},\n\tformat: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .format is now .texture.format.' );\n\t\t\treturn this.texture.format;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .format is now .texture.format.' );\n\t\t\tthis.texture.format = value;\n\n\t\t}\n\t},\n\ttype: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .type is now .texture.type.' );\n\t\t\treturn this.texture.type;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .type is now .texture.type.' );\n\t\t\tthis.texture.type = value;\n\n\t\t}\n\t},\n\tgenerateMipmaps: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .generateMipmaps is now .texture.generateMipmaps.' );\n\t\t\treturn this.texture.generateMipmaps;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .generateMipmaps is now .texture.generateMipmaps.' );\n\t\t\tthis.texture.generateMipmaps = value;\n\n\t\t}\n\t}\n\n} );\n\n//\n\nObject.defineProperties( Audio.prototype, {\n\n\tload: {\n\t\tvalue: function ( file ) {\n\n\t\t\tconsole.warn( 'THREE.Audio: .load has been deprecated. Use THREE.AudioLoader instead.' );\n\t\t\tconst scope = this;\n\t\t\tconst audioLoader = new AudioLoader();\n\t\t\taudioLoader.load( file, function ( buffer ) {\n\n\t\t\t\tscope.setBuffer( buffer );\n\n\t\t\t} );\n\t\t\treturn this;\n\n\t\t}\n\t},\n\tstartTime: {\n\t\tset: function () {\n\n\t\t\tconsole.warn( 'THREE.Audio: .startTime is now .play( delay ).' );\n\n\t\t}\n\t}\n\n} );\n\nAudioAnalyser.prototype.getData = function () {\n\n\tconsole.warn( 'THREE.AudioAnalyser: .getData() is now .getFrequencyData().' );\n\treturn this.getFrequencyData();\n\n};\n\n//\n\nCubeCamera.prototype.updateCubeMap = function ( renderer, scene ) {\n\n\tconsole.warn( 'THREE.CubeCamera: .updateCubeMap() is now .update().' );\n\treturn this.update( renderer, scene );\n\n};\n\nCubeCamera.prototype.clear = function ( renderer, color, depth, stencil ) {\n\n\tconsole.warn( 'THREE.CubeCamera: .clear() is now .renderTarget.clear().' );\n\treturn this.renderTarget.clear( renderer, color, depth, stencil );\n\n};\n\n//\n\nconst GeometryUtils = {\n\n\tmerge: function ( geometry1, geometry2, materialIndexOffset ) {\n\n\t\tconsole.warn( 'THREE.GeometryUtils: .merge() has been moved to Geometry. Use geometry.merge( geometry2, matrix, materialIndexOffset ) instead.' );\n\t\tlet matrix;\n\n\t\tif ( geometry2.isMesh ) {\n\n\t\t\tgeometry2.matrixAutoUpdate && geometry2.updateMatrix();\n\n\t\t\tmatrix = geometry2.matrix;\n\t\t\tgeometry2 = geometry2.geometry;\n\n\t\t}\n\n\t\tgeometry1.merge( geometry2, matrix, materialIndexOffset );\n\n\t},\n\n\tcenter: function ( geometry ) {\n\n\t\tconsole.warn( 'THREE.GeometryUtils: .center() has been moved to Geometry. Use geometry.center() instead.' );\n\t\treturn geometry.center();\n\n\t}\n\n};\n\nImageUtils.crossOrigin = undefined;\n\nImageUtils.loadTexture = function ( url, mapping, onLoad, onError ) {\n\n\tconsole.warn( 'THREE.ImageUtils.loadTexture has been deprecated. Use THREE.TextureLoader() instead.' );\n\n\tconst loader = new TextureLoader();\n\tloader.setCrossOrigin( this.crossOrigin );\n\n\tconst texture = loader.load( url, onLoad, undefined, onError );\n\n\tif ( mapping ) texture.mapping = mapping;\n\n\treturn texture;\n\n};\n\nImageUtils.loadTextureCube = function ( urls, mapping, onLoad, onError ) {\n\n\tconsole.warn( 'THREE.ImageUtils.loadTextureCube has been deprecated. Use THREE.CubeTextureLoader() instead.' );\n\n\tconst loader = new CubeTextureLoader();\n\tloader.setCrossOrigin( this.crossOrigin );\n\n\tconst texture = loader.load( urls, onLoad, undefined, onError );\n\n\tif ( mapping ) texture.mapping = mapping;\n\n\treturn texture;\n\n};\n\nImageUtils.loadCompressedTexture = function () {\n\n\tconsole.error( 'THREE.ImageUtils.loadCompressedTexture has been removed. Use THREE.DDSLoader instead.' );\n\n};\n\nImageUtils.loadCompressedTextureCube = function () {\n\n\tconsole.error( 'THREE.ImageUtils.loadCompressedTextureCube has been removed. Use THREE.DDSLoader instead.' );\n\n};\n\n//\n\nfunction CanvasRenderer() {\n\n\tconsole.error( 'THREE.CanvasRenderer has been removed' );\n\n}\n\n//\n\nfunction JSONLoader() {\n\n\tconsole.error( 'THREE.JSONLoader has been removed.' );\n\n}\n\n//\n\nconst SceneUtils = {\n\n\tcreateMultiMaterialObject: function ( /* geometry, materials */ ) {\n\n\t\tconsole.error( 'THREE.SceneUtils has been moved to /examples/jsm/utils/SceneUtils.js' );\n\n\t},\n\n\tdetach: function ( /* child, parent, scene */ ) {\n\n\t\tconsole.error( 'THREE.SceneUtils has been moved to /examples/jsm/utils/SceneUtils.js' );\n\n\t},\n\n\tattach: function ( /* child, scene, parent */ ) {\n\n\t\tconsole.error( 'THREE.SceneUtils has been moved to /examples/jsm/utils/SceneUtils.js' );\n\n\t}\n\n};\n\n//\n\nfunction LensFlare() {\n\n\tconsole.error( 'THREE.LensFlare has been moved to /examples/jsm/objects/Lensflare.js' );\n\n}\n\nif ( typeof __THREE_DEVTOOLS__ !== 'undefined' ) {\n\n\t/* eslint-disable no-undef */\n\t__THREE_DEVTOOLS__.dispatchEvent( new CustomEvent( 'register', { detail: {\n\t\trevision: REVISION,\n\t} } ) );\n\t/* eslint-enable no-undef */\n\n}\n\nif ( typeof window !== 'undefined' ) {\n\n\tif ( window.__THREE__ ) {\n\n\t\tconsole.warn( 'WARNING: Multiple instances of Three.js being imported.' );\n\n\t} else {\n\n\t\twindow.__THREE__ = REVISION;\n\n\t}\n\n}\n\nexport { ACESFilmicToneMapping, AddEquation, AddOperation, AdditiveAnimationBlendMode, AdditiveBlending, AlphaFormat, AlwaysDepth, AlwaysStencilFunc, AmbientLight, AmbientLightProbe, AnimationClip, AnimationLoader, AnimationMixer, AnimationObjectGroup, AnimationUtils, ArcCurve, ArrayCamera, ArrowHelper, Audio, AudioAnalyser, AudioContext, AudioListener, AudioLoader, AxesHelper, AxisHelper, BackSide, BasicDepthPacking, BasicShadowMap, BinaryTextureLoader, Bone, BooleanKeyframeTrack, BoundingBoxHelper, Box2, Box3, Box3Helper, BoxGeometry as BoxBufferGeometry, BoxGeometry, BoxHelper, BufferAttribute, BufferGeometry, BufferGeometryLoader, ByteType, Cache, Camera, CameraHelper, CanvasRenderer, CanvasTexture, CatmullRomCurve3, CineonToneMapping, CircleGeometry as CircleBufferGeometry, CircleGeometry, ClampToEdgeWrapping, Clock, ClosedSplineCurve3, Color, ColorKeyframeTrack, CompressedTexture, CompressedTextureLoader, ConeGeometry as ConeBufferGeometry, ConeGeometry, CubeCamera, CubeReflectionMapping, CubeRefractionMapping, CubeTexture, CubeTextureLoader, CubeUVReflectionMapping, CubeUVRefractionMapping, CubicBezierCurve, CubicBezierCurve3, CubicInterpolant, CullFaceBack, CullFaceFront, CullFaceFrontBack, CullFaceNone, Curve, CurvePath, CustomBlending, CustomToneMapping, CylinderGeometry as CylinderBufferGeometry, CylinderGeometry, Cylindrical, DataTexture, DataTexture2DArray, DataTexture3D, DataTextureLoader, DataUtils, DecrementStencilOp, DecrementWrapStencilOp, DefaultLoadingManager, DepthFormat, DepthStencilFormat, DepthTexture, DirectionalLight, DirectionalLightHelper, DiscreteInterpolant, DodecahedronGeometry as DodecahedronBufferGeometry, DodecahedronGeometry, DoubleSide, DstAlphaFactor, DstColorFactor, DynamicBufferAttribute, DynamicCopyUsage, DynamicDrawUsage, DynamicReadUsage, EdgesGeometry, EdgesHelper, EllipseCurve, EqualDepth, EqualStencilFunc, EquirectangularReflectionMapping, EquirectangularRefractionMapping, Euler, EventDispatcher, ExtrudeGeometry as ExtrudeBufferGeometry, ExtrudeGeometry, Face3, Face4, FaceColors, FileLoader, FlatShading, Float16BufferAttribute, Float32Attribute, Float32BufferAttribute, Float64Attribute, Float64BufferAttribute, FloatType, Fog, FogExp2, Font, FontLoader, FrontSide, Frustum, GLBufferAttribute, GLSL1, GLSL3, GammaEncoding, GeometryUtils, GreaterDepth, GreaterEqualDepth, GreaterEqualStencilFunc, GreaterStencilFunc, GridHelper, Group, HalfFloatType, HemisphereLight, HemisphereLightHelper, HemisphereLightProbe, IcosahedronGeometry as IcosahedronBufferGeometry, IcosahedronGeometry, ImageBitmapLoader, ImageLoader, ImageUtils, ImmediateRenderObject, IncrementStencilOp, IncrementWrapStencilOp, InstancedBufferAttribute, InstancedBufferGeometry, InstancedInterleavedBuffer, InstancedMesh, Int16Attribute, Int16BufferAttribute, Int32Attribute, Int32BufferAttribute, Int8Attribute, Int8BufferAttribute, IntType, InterleavedBuffer, InterleavedBufferAttribute, Interpolant, InterpolateDiscrete, InterpolateLinear, InterpolateSmooth, InvertStencilOp, JSONLoader, KeepStencilOp, KeyframeTrack, LOD, LatheGeometry as LatheBufferGeometry, LatheGeometry, Layers, LensFlare, LessDepth, LessEqualDepth, LessEqualStencilFunc, LessStencilFunc, Light, LightProbe, Line, Line3, LineBasicMaterial, LineCurve, LineCurve3, LineDashedMaterial, LineLoop, LinePieces, LineSegments, LineStrip, LinearEncoding, LinearFilter, LinearInterpolant, LinearMipMapLinearFilter, LinearMipMapNearestFilter, LinearMipmapLinearFilter, LinearMipmapNearestFilter, LinearToneMapping, Loader, LoaderUtils, LoadingManager, LogLuvEncoding, LoopOnce, LoopPingPong, LoopRepeat, LuminanceAlphaFormat, LuminanceFormat, MOUSE, Material, MaterialLoader, MathUtils as Math, MathUtils, Matrix3, Matrix4, MaxEquation, Mesh, MeshBasicMaterial, MeshDepthMaterial, MeshDistanceMaterial, MeshFaceMaterial, MeshLambertMaterial, MeshMatcapMaterial, MeshNormalMaterial, MeshPhongMaterial, MeshPhysicalMaterial, MeshStandardMaterial, MeshToonMaterial, MinEquation, MirroredRepeatWrapping, MixOperation, MultiMaterial, MultiplyBlending, MultiplyOperation, NearestFilter, NearestMipMapLinearFilter, NearestMipMapNearestFilter, NearestMipmapLinearFilter, NearestMipmapNearestFilter, NeverDepth, NeverStencilFunc, NoBlending, NoColors, NoToneMapping, NormalAnimationBlendMode, NormalBlending, NotEqualDepth, NotEqualStencilFunc, NumberKeyframeTrack, Object3D, ObjectLoader, ObjectSpaceNormalMap, OctahedronGeometry as OctahedronBufferGeometry, OctahedronGeometry, OneFactor, OneMinusDstAlphaFactor, OneMinusDstColorFactor, OneMinusSrcAlphaFactor, OneMinusSrcColorFactor, OrthographicCamera, PCFShadowMap, PCFSoftShadowMap, PMREMGenerator, ParametricGeometry as ParametricBufferGeometry, ParametricGeometry, Particle, ParticleBasicMaterial, ParticleSystem, ParticleSystemMaterial, Path, PerspectiveCamera, Plane, PlaneGeometry as PlaneBufferGeometry, PlaneGeometry, PlaneHelper, PointCloud, PointCloudMaterial, PointLight, PointLightHelper, Points, PointsMaterial, PolarGridHelper, PolyhedronGeometry as PolyhedronBufferGeometry, PolyhedronGeometry, PositionalAudio, PropertyBinding, PropertyMixer, QuadraticBezierCurve, QuadraticBezierCurve3, Quaternion, QuaternionKeyframeTrack, QuaternionLinearInterpolant, REVISION, RGBADepthPacking, RGBAFormat, RGBAIntegerFormat, RGBA_ASTC_10x10_Format, RGBA_ASTC_10x5_Format, RGBA_ASTC_10x6_Format, RGBA_ASTC_10x8_Format, RGBA_ASTC_12x10_Format, RGBA_ASTC_12x12_Format, RGBA_ASTC_4x4_Format, RGBA_ASTC_5x4_Format, RGBA_ASTC_5x5_Format, RGBA_ASTC_6x5_Format, RGBA_ASTC_6x6_Format, RGBA_ASTC_8x5_Format, RGBA_ASTC_8x6_Format, RGBA_ASTC_8x8_Format, RGBA_BPTC_Format, RGBA_ETC2_EAC_Format, RGBA_PVRTC_2BPPV1_Format, RGBA_PVRTC_4BPPV1_Format, RGBA_S3TC_DXT1_Format, RGBA_S3TC_DXT3_Format, RGBA_S3TC_DXT5_Format, RGBDEncoding, RGBEEncoding, RGBEFormat, RGBFormat, RGBIntegerFormat, RGBM16Encoding, RGBM7Encoding, RGB_ETC1_Format, RGB_ETC2_Format, RGB_PVRTC_2BPPV1_Format, RGB_PVRTC_4BPPV1_Format, RGB_S3TC_DXT1_Format, RGFormat, RGIntegerFormat, RawShaderMaterial, Ray, Raycaster, RectAreaLight, RedFormat, RedIntegerFormat, ReinhardToneMapping, RepeatWrapping, ReplaceStencilOp, ReverseSubtractEquation, RingGeometry as RingBufferGeometry, RingGeometry, SRGB8_ALPHA8_ASTC_10x10_Format, SRGB8_ALPHA8_ASTC_10x5_Format, SRGB8_ALPHA8_ASTC_10x6_Format, SRGB8_ALPHA8_ASTC_10x8_Format, SRGB8_ALPHA8_ASTC_12x10_Format, SRGB8_ALPHA8_ASTC_12x12_Format, SRGB8_ALPHA8_ASTC_4x4_Format, SRGB8_ALPHA8_ASTC_5x4_Format, SRGB8_ALPHA8_ASTC_5x5_Format, SRGB8_ALPHA8_ASTC_6x5_Format, SRGB8_ALPHA8_ASTC_6x6_Format, SRGB8_ALPHA8_ASTC_8x5_Format, SRGB8_ALPHA8_ASTC_8x6_Format, SRGB8_ALPHA8_ASTC_8x8_Format, Scene, SceneUtils, ShaderChunk, ShaderLib, ShaderMaterial, ShadowMaterial, Shape, ShapeGeometry as ShapeBufferGeometry, ShapeGeometry, ShapePath, ShapeUtils, ShortType, Skeleton, SkeletonHelper, SkinnedMesh, SmoothShading, Sphere, SphereGeometry as SphereBufferGeometry, SphereGeometry, Spherical, SphericalHarmonics3, Spline, SplineCurve, SplineCurve3, SpotLight, SpotLightHelper, Sprite, SpriteMaterial, SrcAlphaFactor, SrcAlphaSaturateFactor, SrcColorFactor, StaticCopyUsage, StaticDrawUsage, StaticReadUsage, StereoCamera, StreamCopyUsage, StreamDrawUsage, StreamReadUsage, StringKeyframeTrack, SubtractEquation, SubtractiveBlending, TOUCH, TangentSpaceNormalMap, TetrahedronGeometry as TetrahedronBufferGeometry, TetrahedronGeometry, TextGeometry as TextBufferGeometry, TextGeometry, Texture, TextureLoader, TorusGeometry as TorusBufferGeometry, TorusGeometry, TorusKnotGeometry as TorusKnotBufferGeometry, TorusKnotGeometry, Triangle, TriangleFanDrawMode, TriangleStripDrawMode, TrianglesDrawMode, TubeGeometry as TubeBufferGeometry, TubeGeometry, UVMapping, Uint16Attribute, Uint16BufferAttribute, Uint32Attribute, Uint32BufferAttribute, Uint8Attribute, Uint8BufferAttribute, Uint8ClampedAttribute, Uint8ClampedBufferAttribute, Uniform, UniformsLib, UniformsUtils, UnsignedByteType, UnsignedInt248Type, UnsignedIntType, UnsignedShort4444Type, UnsignedShort5551Type, UnsignedShort565Type, UnsignedShortType, VSMShadowMap, Vector2, Vector3, Vector4, VectorKeyframeTrack, Vertex, VertexColors, VideoTexture, WebGL1Renderer, WebGLCubeRenderTarget, WebGLMultisampleRenderTarget, WebGLRenderTarget, WebGLRenderTargetCube, WebGLRenderer, WebGLUtils, WireframeGeometry, WireframeHelper, WrapAroundEnding, XHRLoader, ZeroCurvatureEnding, ZeroFactor, ZeroSlopeEnding, ZeroStencilOp, sRGBEncoding };\n","// see https://tools.ietf.org/html/rfc1808\n\n(function (root) {\n  var URL_REGEX =\n    /^(?=((?:[a-zA-Z0-9+\\-.]+:)?))\\1(?=((?:\\/\\/[^\\/?#]*)?))\\2(?=((?:(?:[^?#\\/]*\\/)*[^;?#\\/]*)?))\\3((?:;[^?#]*)?)(\\?[^#]*)?(#[^]*)?$/;\n  var FIRST_SEGMENT_REGEX = /^(?=([^\\/?#]*))\\1([^]*)$/;\n  var SLASH_DOT_REGEX = /(?:\\/|^)\\.(?=\\/)/g;\n  var SLASH_DOT_DOT_REGEX = /(?:\\/|^)\\.\\.\\/(?!\\.\\.\\/)[^\\/]*(?=\\/)/g;\n\n  var URLToolkit = {\n    // If opts.alwaysNormalize is true then the path will always be normalized even when it starts with / or //\n    // E.g\n    // With opts.alwaysNormalize = false (default, spec compliant)\n    // http://a.com/b/cd + /e/f/../g => http://a.com/e/f/../g\n    // With opts.alwaysNormalize = true (not spec compliant)\n    // http://a.com/b/cd + /e/f/../g => http://a.com/e/g\n    buildAbsoluteURL: function (baseURL, relativeURL, opts) {\n      opts = opts || {};\n      // remove any remaining space and CRLF\n      baseURL = baseURL.trim();\n      relativeURL = relativeURL.trim();\n      if (!relativeURL) {\n        // 2a) If the embedded URL is entirely empty, it inherits the\n        // entire base URL (i.e., is set equal to the base URL)\n        // and we are done.\n        if (!opts.alwaysNormalize) {\n          return baseURL;\n        }\n        var basePartsForNormalise = URLToolkit.parseURL(baseURL);\n        if (!basePartsForNormalise) {\n          throw new Error('Error trying to parse base URL.');\n        }\n        basePartsForNormalise.path = URLToolkit.normalizePath(\n          basePartsForNormalise.path\n        );\n        return URLToolkit.buildURLFromParts(basePartsForNormalise);\n      }\n      var relativeParts = URLToolkit.parseURL(relativeURL);\n      if (!relativeParts) {\n        throw new Error('Error trying to parse relative URL.');\n      }\n      if (relativeParts.scheme) {\n        // 2b) If the embedded URL starts with a scheme name, it is\n        // interpreted as an absolute URL and we are done.\n        if (!opts.alwaysNormalize) {\n          return relativeURL;\n        }\n        relativeParts.path = URLToolkit.normalizePath(relativeParts.path);\n        return URLToolkit.buildURLFromParts(relativeParts);\n      }\n      var baseParts = URLToolkit.parseURL(baseURL);\n      if (!baseParts) {\n        throw new Error('Error trying to parse base URL.');\n      }\n      if (!baseParts.netLoc && baseParts.path && baseParts.path[0] !== '/') {\n        // If netLoc missing and path doesn't start with '/', assume everthing before the first '/' is the netLoc\n        // This causes 'example.com/a' to be handled as '//example.com/a' instead of '/example.com/a'\n        var pathParts = FIRST_SEGMENT_REGEX.exec(baseParts.path);\n        baseParts.netLoc = pathParts[1];\n        baseParts.path = pathParts[2];\n      }\n      if (baseParts.netLoc && !baseParts.path) {\n        baseParts.path = '/';\n      }\n      var builtParts = {\n        // 2c) Otherwise, the embedded URL inherits the scheme of\n        // the base URL.\n        scheme: baseParts.scheme,\n        netLoc: relativeParts.netLoc,\n        path: null,\n        params: relativeParts.params,\n        query: relativeParts.query,\n        fragment: relativeParts.fragment,\n      };\n      if (!relativeParts.netLoc) {\n        // 3) If the embedded URL's <net_loc> is non-empty, we skip to\n        // Step 7.  Otherwise, the embedded URL inherits the <net_loc>\n        // (if any) of the base URL.\n        builtParts.netLoc = baseParts.netLoc;\n        // 4) If the embedded URL path is preceded by a slash \"/\", the\n        // path is not relative and we skip to Step 7.\n        if (relativeParts.path[0] !== '/') {\n          if (!relativeParts.path) {\n            // 5) If the embedded URL path is empty (and not preceded by a\n            // slash), then the embedded URL inherits the base URL path\n            builtParts.path = baseParts.path;\n            // 5a) if the embedded URL's <params> is non-empty, we skip to\n            // step 7; otherwise, it inherits the <params> of the base\n            // URL (if any) and\n            if (!relativeParts.params) {\n              builtParts.params = baseParts.params;\n              // 5b) if the embedded URL's <query> is non-empty, we skip to\n              // step 7; otherwise, it inherits the <query> of the base\n              // URL (if any) and we skip to step 7.\n              if (!relativeParts.query) {\n                builtParts.query = baseParts.query;\n              }\n            }\n          } else {\n            // 6) The last segment of the base URL's path (anything\n            // following the rightmost slash \"/\", or the entire path if no\n            // slash is present) is removed and the embedded URL's path is\n            // appended in its place.\n            var baseURLPath = baseParts.path;\n            var newPath =\n              baseURLPath.substring(0, baseURLPath.lastIndexOf('/') + 1) +\n              relativeParts.path;\n            builtParts.path = URLToolkit.normalizePath(newPath);\n          }\n        }\n      }\n      if (builtParts.path === null) {\n        builtParts.path = opts.alwaysNormalize\n          ? URLToolkit.normalizePath(relativeParts.path)\n          : relativeParts.path;\n      }\n      return URLToolkit.buildURLFromParts(builtParts);\n    },\n    parseURL: function (url) {\n      var parts = URL_REGEX.exec(url);\n      if (!parts) {\n        return null;\n      }\n      return {\n        scheme: parts[1] || '',\n        netLoc: parts[2] || '',\n        path: parts[3] || '',\n        params: parts[4] || '',\n        query: parts[5] || '',\n        fragment: parts[6] || '',\n      };\n    },\n    normalizePath: function (path) {\n      // The following operations are\n      // then applied, in order, to the new path:\n      // 6a) All occurrences of \"./\", where \".\" is a complete path\n      // segment, are removed.\n      // 6b) If the path ends with \".\" as a complete path segment,\n      // that \".\" is removed.\n      path = path.split('').reverse().join('').replace(SLASH_DOT_REGEX, '');\n      // 6c) All occurrences of \"<segment>/../\", where <segment> is a\n      // complete path segment not equal to \"..\", are removed.\n      // Removal of these path segments is performed iteratively,\n      // removing the leftmost matching pattern on each iteration,\n      // until no matching pattern remains.\n      // 6d) If the path ends with \"<segment>/..\", where <segment> is a\n      // complete path segment not equal to \"..\", that\n      // \"<segment>/..\" is removed.\n      while (\n        path.length !== (path = path.replace(SLASH_DOT_DOT_REGEX, '')).length\n      ) {}\n      return path.split('').reverse().join('');\n    },\n    buildURLFromParts: function (parts) {\n      return (\n        parts.scheme +\n        parts.netLoc +\n        parts.path +\n        parts.params +\n        parts.query +\n        parts.fragment\n      );\n    },\n  };\n\n  if (typeof exports === 'object' && typeof module === 'object')\n    module.exports = URLToolkit;\n  else if (typeof define === 'function' && define.amd)\n    define([], function () {\n      return URLToolkit;\n    });\n  else if (typeof exports === 'object') exports['URLToolkit'] = URLToolkit;\n  else root['URLToolkit'] = URLToolkit;\n})(this);\n","// Unique ID creation requires a high quality random # generator. In the browser we therefore\n// require the crypto API and do not support built-in fallback to lower quality random number\n// generators (like Math.random()).\nvar getRandomValues;\nvar rnds8 = new Uint8Array(16);\nexport default function rng() {\n  // lazy load so that environments that need to polyfill have a chance to do so\n  if (!getRandomValues) {\n    // getRandomValues needs to be invoked in a context where \"this\" is a Crypto implementation. Also,\n    // find the complete implementation of crypto (msCrypto) on IE11.\n    getRandomValues = typeof crypto !== 'undefined' && crypto.getRandomValues && crypto.getRandomValues.bind(crypto) || typeof msCrypto !== 'undefined' && typeof msCrypto.getRandomValues === 'function' && msCrypto.getRandomValues.bind(msCrypto);\n\n    if (!getRandomValues) {\n      throw new Error('crypto.getRandomValues() not supported. See https://github.com/uuidjs/uuid#getrandomvalues-not-supported');\n    }\n  }\n\n  return getRandomValues(rnds8);\n}","export default /^(?:[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}|00000000-0000-0000-0000-000000000000)$/i;","import REGEX from './regex.js';\n\nfunction validate(uuid) {\n  return typeof uuid === 'string' && REGEX.test(uuid);\n}\n\nexport default validate;","import validate from './validate.js';\n/**\n * Convert array of 16 byte values to UUID string format of the form:\n * XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX\n */\n\nvar byteToHex = [];\n\nfor (var i = 0; i < 256; ++i) {\n  byteToHex.push((i + 0x100).toString(16).substr(1));\n}\n\nfunction stringify(arr) {\n  var offset = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 0;\n  // Note: Be careful editing this code!  It's been tuned for performance\n  // and works in ways you may not expect. See https://github.com/uuidjs/uuid/pull/434\n  var uuid = (byteToHex[arr[offset + 0]] + byteToHex[arr[offset + 1]] + byteToHex[arr[offset + 2]] + byteToHex[arr[offset + 3]] + '-' + byteToHex[arr[offset + 4]] + byteToHex[arr[offset + 5]] + '-' + byteToHex[arr[offset + 6]] + byteToHex[arr[offset + 7]] + '-' + byteToHex[arr[offset + 8]] + byteToHex[arr[offset + 9]] + '-' + byteToHex[arr[offset + 10]] + byteToHex[arr[offset + 11]] + byteToHex[arr[offset + 12]] + byteToHex[arr[offset + 13]] + byteToHex[arr[offset + 14]] + byteToHex[arr[offset + 15]]).toLowerCase(); // Consistency check for valid UUID.  If this throws, it's likely due to one\n  // of the following:\n  // - One or more input array values don't map to a hex octet (leading to\n  // \"undefined\" in the uuid)\n  // - Invalid input values for the RFC `version` or `variant` fields\n\n  if (!validate(uuid)) {\n    throw TypeError('Stringified UUID is invalid');\n  }\n\n  return uuid;\n}\n\nexport default stringify;","import rng from './rng.js';\nimport stringify from './stringify.js';\n\nfunction v4(options, buf, offset) {\n  options = options || {};\n  var rnds = options.random || (options.rng || rng)(); // Per 4.4, set bits for version and `clock_seq_hi_and_reserved`\n\n  rnds[6] = rnds[6] & 0x0f | 0x40;\n  rnds[8] = rnds[8] & 0x3f | 0x80; // Copy bytes to buffer, if provided\n\n  if (buf) {\n    offset = offset || 0;\n\n    for (var i = 0; i < 16; ++i) {\n      buf[offset + i] = rnds[i];\n    }\n\n    return buf;\n  }\n\n  return stringify(rnds);\n}\n\nexport default v4;","videojs.addLanguage('ar', {\n  \"Play\": \"تشغيل\",\n  \"Pause\": \"إيقاف\",\n  \"Current Time\": \"الوقت الحالي\",\n  \"Duration\": \"مدة\",\n  \"Remaining Time\": \"الوقت المتبقي\",\n  \"Stream Type\": \"نوع التيار\",\n  \"LIVE\": \"مباشر\",\n  \"Loaded\": \"تم التحميل\",\n  \"Progress\": \"التقدم\",\n  \"Fullscreen\": \"ملء الشاشة\",\n  \"Non-Fullscreen\": \"تعطيل ملء الشاشة\",\n  \"Mute\": \"صامت\",\n  \"Unmute\": \"غير الصامت\",\n  \"Playback Rate\": \"معدل التشغيل\",\n  \"Subtitles\": \"الترجمة\",\n  \"subtitles off\": \"إيقاف الترجمة\",\n  \"Captions\": \"التعليقات\",\n  \"captions off\": \"إيقاف التعليقات\",\n  \"Chapters\": \"فصول\",\n  \"You aborted the media playback\": \"لقد ألغيت تشغيل الفيديو\",\n  \"A network error caused the media download to fail part-way.\": \"تسبب خطأ في الشبكة بفشل تحميل الفيديو بالكامل.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"لا يمكن تحميل الفيديو بسبب فشل في الخادوم أو الشبكة ، أو فشل بسبب عدم إمكانية قراءة تنسيق الفيديو.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"تم إيقاف تشغيل الفيديو بسبب مشكلة فساد أو لأن الفيديو المستخدم يستخدم ميزات غير مدعومة من متصفحك.\",\n  \"No compatible source was found for this media.\": \"فشل العثور على أي مصدر متوافق مع هذا الفيديو.\",\n  \"Play Video\": \"تشغيل الفيديو\",\n  \"Close\": \"أغلق\",\n  \"Modal Window\": \"نافذة مشروطة\",\n  \"This is a modal window\": \"هذه نافذة مشروطة\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"يمكن غلق هذه النافذة المشروطة عن طريق الضغط على زر الخروج أو تفعيل زر الإغلاق\",\n  \", opens captions settings dialog\": \", تفتح نافذة  خيارات التعليقات\",\n  \", opens subtitles settings dialog\": \", تفتح نافذة  خيارات الترجمة\",\n  \", selected\": \", مختار\",\n  \"Audio Player\": \"مشغل الصوت\",\n  \"Video Player\": \"مشغل الفيديو\",\n  \"Replay\": \"إعادة التشغيل\",\n  \"Seek to live, currently behind live\": \"ذهاب إلى نقطة البث المباشر، متأخر عن البث المباشر حاليًا\",\n  \"Seek to live, currently playing live\": \"ذهاب إلى نقطة البث المباشر، البث المباشر قيد التشغيل حاليًا\",\n  \"Progress Bar\": \"شريط التقدم\",\n  \"Descriptions\": \"الأوصاف\",\n  \"descriptions off\": \"إخفاء الأوصاف\",\n  \"Audio Track\": \"المسار الصوتي\",\n  \"Volume Level\": \"مستوى الصوت\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"الوسائط مشفرة وليس لدينا الرموز اللازمة لفك شفرتها.\",\n  \"Close Modal Dialog\": \"إغلاق مربع الحوار المشروط\",\n  \", opens descriptions settings dialog\": \"، يفتح مربع حوار إعدادات الأوصاف\",\n  \"captions settings\": \"إعدادات التعليقات التوضيحية\",\n  \"subtitles settings\": \"إعدادات الترجمات\",\n  \"descriptions settings\": \"إعدادات الأوصاف\",\n  \"Text\": \"النص\",\n  \"White\": \"أبيض\",\n  \"Black\": \"أسود\",\n  \"Red\": \"أحمر\",\n  \"Green\": \"أخضر\",\n  \"Blue\": \"أزرق\",\n  \"Yellow\": \"أصفر\",\n  \"Magenta\": \"أرجواني\",\n  \"Cyan\": \"أزرق سماوي\",\n  \"Background\": \"الخلفية\",\n  \"Window\": \"نافذة\",\n  \"Transparent\": \"شفاف\",\n  \"Semi-Transparent\": \"نصف شفاف\",\n  \"Opaque\": \"معتم\",\n  \"Font Size\": \"حجم الخط\",\n  \"Text Edge Style\": \"نمط حواف النص\",\n  \"None\": \"لا شيء\",\n  \"Raised\": \"بارز\",\n  \"Depressed\": \"منخفض\",\n  \"Uniform\": \"منتظم\",\n  \"Dropshadow\": \"ظل خلفي\",\n  \"Font Family\": \"عائلة الخطوط\",\n  \"Proportional Sans-Serif\": \"Proportional Sans-Serif\",\n  \"Monospace Sans-Serif\": \"Monospace Sans-Serif\",\n  \"Proportional Serif\": \"Proportional Serif\",\n  \"Monospace Serif\": \"Monospace Serif\",\n  \"Casual\": \"Casual\",\n  \"Script\": \"Script\",\n  \"Small Caps\": \"Small Caps\",\n  \"Reset\": \"إعادة الضبط\",\n  \"restore all settings to the default values\": \"استعادة كل الإعدادات إلى القيم الافتراضية\",\n  \"Done\": \"تم\",\n  \"Caption Settings Dialog\": \"مربع حوار إعدادات التعليقات التوضيحية\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"بداية نافذة مربع حوار. الضغط على زر \\\"Escape\\\" سيؤدي إلى الإلغاء وإغلاق النافذة.\",\n  \"End of dialog window.\": \"نهاية نافذة مربع حوار.\",\n  \"{1} is loading.\": \"{1} قيد التحميل.\"\n});","videojs.addLanguage('ba', {\n  \"Play\": \"Pusti\",\n  \"Pause\": \"Pauza\",\n  \"Current Time\": \"Trenutno vrijeme\",\n  \"Duration\": \"Vrijeme trajanja\",\n  \"Remaining Time\": \"Preostalo vrijeme\",\n  \"Stream Type\": \"Način strimovanja\",\n  \"LIVE\": \"UŽIVO\",\n  \"Loaded\": \"Učitan\",\n  \"Progress\": \"Progres\",\n  \"Fullscreen\": \"Puni ekran\",\n  \"Non-Fullscreen\": \"Mali ekran\",\n  \"Mute\": \"Prigušen\",\n  \"Unmute\": \"Ne-prigušen\",\n  \"Playback Rate\": \"Stopa reprodukcije\",\n  \"Subtitles\": \"Podnaslov\",\n  \"subtitles off\": \"Podnaslov deaktiviran\",\n  \"Captions\": \"Titlovi\",\n  \"captions off\": \"Titlovi deaktivirani\",\n  \"Chapters\": \"Poglavlja\",\n  \"You aborted the media playback\": \"Isključili ste reprodukciju videa.\",\n  \"A network error caused the media download to fail part-way.\": \"Video se prestao preuzimati zbog greške na mreži.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"Video se ne može reproducirati zbog servera, greške u mreži ili je format ne podržan.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"Reprodukcija videa je zaustavljenja zbog greške u formatu ili zbog verzije vašeg pretraživača.\",\n  \"No compatible source was found for this media.\": \"Nije nađen nijedan kompatibilan izvor ovog videa.\"\n});","videojs.addLanguage('bg', {\n  \"Play\": \"Възпроизвеждане\",\n  \"Pause\": \"Пауза\",\n  \"Current Time\": \"Текущо време\",\n  \"Duration\": \"Продължителност\",\n  \"Remaining Time\": \"Оставащо време\",\n  \"Stream Type\": \"Тип на потока\",\n  \"LIVE\": \"НА ЖИВО\",\n  \"Loaded\": \"Заредено\",\n  \"Progress\": \"Прогрес\",\n  \"Fullscreen\": \"Цял екран\",\n  \"Non-Fullscreen\": \"Спиране на цял екран\",\n  \"Mute\": \"Без звук\",\n  \"Unmute\": \"Със звук\",\n  \"Playback Rate\": \"Скорост на възпроизвеждане\",\n  \"Subtitles\": \"Субтитри\",\n  \"subtitles off\": \"Спряни субтитри\",\n  \"Captions\": \"Аудио надписи\",\n  \"captions off\": \"Спряни аудио надписи\",\n  \"Chapters\": \"Глави\",\n  \"You aborted the media playback\": \"Спряхте възпроизвеждането на видеото\",\n  \"A network error caused the media download to fail part-way.\": \"Грешка в мрежата провали изтеглянето на видеото.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"Видеото не може да бъде заредено заради проблем със сървъра или мрежата или защото този формат не е поддържан.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"Възпроизвеждането на видеото беше прекъснато заради проблем с файла или защото видеото използва опции които браузърът Ви не поддържа.\",\n  \"No compatible source was found for this media.\": \"Не беше намерен съвместим източник за това видео.\"\n});","videojs.addLanguage('ca', {\n  \"Play\": \"Reproducció\",\n  \"Pause\": \"Pausa\",\n  \"Current Time\": \"Temps reproduït\",\n  \"Duration\": \"Durada total\",\n  \"Remaining Time\": \"Temps restant\",\n  \"Stream Type\": \"Tipus de seqüència\",\n  \"LIVE\": \"EN DIRECTE\",\n  \"Loaded\": \"Carregat\",\n  \"Progress\": \"Progrés\",\n  \"Fullscreen\": \"Pantalla completa\",\n  \"Non-Fullscreen\": \"Pantalla no completa\",\n  \"Mute\": \"Silencia\",\n  \"Unmute\": \"Amb so\",\n  \"Playback Rate\": \"Velocitat de reproducció\",\n  \"Subtitles\": \"Subtítols\",\n  \"subtitles off\": \"Subtítols desactivats\",\n  \"Captions\": \"Llegendes\",\n  \"captions off\": \"Llegendes desactivades\",\n  \"Chapters\": \"Capítols\",\n  \"You aborted the media playback\": \"Heu interromput la reproducció del vídeo.\",\n  \"A network error caused the media download to fail part-way.\": \"Un error de la xarxa ha interromput la baixada del vídeo.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"No s'ha pogut carregar el vídeo perquè el servidor o la xarxa han fallat, o bé perquè el seu format no és compatible.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"La reproducció de vídeo s'ha interrumput per un problema de corrupció de dades o bé perquè el vídeo demanava funcions que el vostre navegador no ofereix.\",\n  \"No compatible source was found for this media.\": \"No s'ha trobat cap font compatible amb el vídeo.\"\n});","videojs.addLanguage('cs', {\n  \"Audio Player\": \"Audio Přehravač\",\n  \"Video Player\": \"Video Přehravač\",\n  \"Play\": \"Přehrát\",\n  \"Pause\": \"Pauza\",\n  \"Replay\": \"Spustit znovu\",\n  \"Current Time\": \"Aktuální čas\",\n  \"Duration\": \"Doba trvání\",\n  \"Remaining Time\": \"Zbývající čas\",\n  \"Stream Type\": \"Typ streamu\",\n  \"LIVE\": \"ŽIVĚ\",\n  \"Loaded\": \"Načteno\",\n  \"Progress\": \"Stav\",\n  \"Progress Bar\": \"Ukazatel průběhu\",\n  \"progress bar timing: currentTime={1} duration={2}\": \"{1} z {2}\",\n  \"Fullscreen\": \"Celá obrazovka\",\n  \"Non-Fullscreen\": \"Běžné zobrazení\",\n  \"Mute\": \"Ztlumit zvuk\",\n  \"Unmute\": \"Zapnout zvuk\",\n  \"Playback Rate\": \"Rychlost přehrávání\",\n  \"Subtitles\": \"Titulky\",\n  \"subtitles off\": \"Bez titulků\",\n  \"Captions\": \"Popisky\",\n  \"captions off\": \"Popisky vypnuty\",\n  \"Chapters\": \"Kapitoly\",\n  \"Descriptions\": \"Popisy\",\n  \"descriptions off\": \"Bez popisů\",\n  \"Audio Track\": \"Zvuková stopa\",\n  \"Volume Level\": \"Hlasitost\",\n  \"You aborted the media playback\": \"Přehrávání videa bylo přerušeno.\",\n  \"A network error caused the media download to fail part-way.\": \"Video nemohlo být načteno kvůli chybě v síti.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"Video nemohlo být načteno, buď kvůli chybě serveru, sítě nebo proto, že daný formát není podporován.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"Váš prohlížeč nepodporuje tento formát videa.\",\n  \"No compatible source was found for this media.\": \"Nevalidní zadaný zdroj videa.\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"Chyba při dešifrování videa.\",\n  \"Play Video\": \"Přehrát video\",\n  \"Close\": \"Zavřit\",\n  \"Close Modal Dialog\": \"Zavřít okno\",\n  \"Modal Window\": \"Modální okno\",\n  \"This is a modal window\": \"Toto je modální okno\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"Toto okno se dá zavřít křížkem nebo klávesou Esc.\",\n  \", opens captions settings dialog\": \", otevřít okno pro nastavení popisků\",\n  \", opens subtitles settings dialog\": \", otevřít okno pro nastavení titulků\",\n  \", opens descriptions settings dialog\": \", otevře okno pro nastavení popisků pro nevidomé\",\n  \", selected\": \", vybráno\",\n  \"captions settings\": \"nastavení popisků\",\n  \"subtitles settings\": \"nastavení titulků\",\n  \"descriptions settings\": \"nastavení popisků pro nevidomé\",\n  \"Text\": \"Titulky\",\n  \"White\": \"Bílé\",\n  \"Black\": \"Černé\",\n  \"Red\": \"Červené\",\n  \"Green\": \"Zelené\",\n  \"Blue\": \"Modré\",\n  \"Yellow\": \"Žluté\",\n  \"Magenta\": \"Fialové\",\n  \"Cyan\": \"Azurové\",\n  \"Background\": \"Pozadí titulků\",\n  \"Window\": \"Okno\",\n  \"Transparent\": \"Průhledné\",\n  \"Semi-Transparent\": \"Poloprůhledné\",\n  \"Opaque\": \"Neprůhledné\",\n  \"Font Size\": \"Velikost písma\",\n  \"Text Edge Style\": \"Okraje písma\",\n  \"None\": \"Bez okraje\",\n  \"Raised\": \"Zvýšený\",\n  \"Depressed\": \"Propadlý\",\n  \"Uniform\": \"Rovnoměrný\",\n  \"Dropshadow\": \"Stínovaný\",\n  \"Font Family\": \"Rodina písma\",\n  \"Proportional Sans-Serif\": \"Proporcionální bezpatkové\",\n  \"Monospace Sans-Serif\": \"Monospace bezpatkové\",\n  \"Proportional Serif\": \"Proporcionální patkové\",\n  \"Monospace Serif\": \"Monospace patkové\",\n  \"Casual\": \"Hravé\",\n  \"Script\": \"Ručně psané\",\n  \"Small Caps\": \"Malé kapitálky\",\n  \"Reset\": \"Obnovit\",\n  \"restore all settings to the default values\": \"Vrátit nastavení do výchozího stavu\",\n  \"Done\": \"Hotovo\",\n  \"Caption Settings Dialog\": \"Okno s nastavením titulků\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"Začátek dialogového okna. Klávesa Esc okno zavře.\",\n  \"End of dialog window.\": \"Konec dialogového okna.\",\n  \"{1} is loading.\": \"{1} se načítá.\"\n});","videojs.addLanguage('cy', {\n  \"Audio Player\": \"Chwaraewr sain\",\n  \"Video Player\": \"Chwaraewr fideo\",\n  \"Play\": \"Chwarae\",\n  \"Pause\": \"Oedi\",\n  \"Replay\": \"Ailchwarae\",\n  \"Current Time\": \"Amser Cyfredol\",\n  \"Duration\": \"Parhad\",\n  \"Remaining Time\": \"Amser ar ôl\",\n  \"Stream Type\": \"Math o Ffrwd\",\n  \"LIVE\": \"YN FYW\",\n  \"Loaded\": \"Llwythwyd\",\n  \"Progress\": \"Cynnydd\",\n  \"Progress Bar\": \"Bar Cynnydd\",\n  \"progress bar timing: currentTime={1} duration={2}\": \"{1} o {2}\",\n  \"Fullscreen\": \"Sgrîn Lawn\",\n  \"Non-Fullscreen\": \"Ffenestr\",\n  \"Mute\": \"Pylu\",\n  \"Unmute\": \"Dad-bylu\",\n  \"Playback Rate\": \"Cyfradd Chwarae\",\n  \"Subtitles\": \"Isdeitlau\",\n  \"subtitles off\": \"Isdeitlau i ffwrdd\",\n  \"Captions\": \"Capsiynau\",\n  \"captions off\": \"Capsiynau i ffwrdd\",\n  \"Chapters\": \"Penodau\",\n  \"Descriptions\": \"Disgrifiadau\",\n  \"descriptions off\": \"disgrifiadau i ffwrdd\",\n  \"Audio Track\": \"Trac Sain\",\n  \"Volume Level\": \"Lefel Sain\",\n  \"You aborted the media playback\": \"Atalwyd y fideo gennych\",\n  \"A network error caused the media download to fail part-way.\": \"Mae gwall rhwydwaith wedi achosi methiant lawrlwytho.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"Ni lwythodd y fideo, oherwydd methiant gweinydd neu rwydwaith, neu achos nid yw'r system yn cefnogi'r fformat.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"Atalwyd y fideo oherwydd problem llygredd data neu oherwydd nid yw'ch porwr yn cefnogi nodweddion penodol o'r fideo.\",\n  \"No compatible source was found for this media.\": \"Nid oedd modd canfod ffynhonnell cytûn am y fideo hwn.\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"Mae'r fideo wedi ei amgryptio ac nid oes allweddion gennym.\",\n  \"Play Video\": \"Chwarae Fideo\",\n  \"Close\": \"Cau\",\n  \"Close Modal Dialog\": \"Cau Blwch Deialog Moddol\",\n  \"Modal Window\": \"Ffenestr Foddol\",\n  \"This is a modal window\": \"Mae hon yn ffenestr foddol\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"Gallech chi gau'r ffenestr foddol hon trwy wasgu Escape neu glicio'r botwm cau.\",\n  \", opens captions settings dialog\": \", yn agor gosodiadau capsiynau\",\n  \", opens subtitles settings dialog\": \", yn agor gosodiadau isdeitlau\",\n  \", opens descriptions settings dialog\": \", yn agor gosodiadau disgrifiadau\",\n  \", selected\": \", detholwyd\",\n  \"captions settings\": \"gosodiadau capsiynau\",\n  \"subtitles settings\": \"gosodiadau isdeitlau\",\n  \"descriptions settings\": \"gosodiadau disgrifiadau\",\n  \"Text\": \"Testun\",\n  \"White\": \"Gwyn\",\n  \"Black\": \"Du\",\n  \"Red\": \"Coch\",\n  \"Green\": \"Gwyrdd\",\n  \"Blue\": \"Glas\",\n  \"Yellow\": \"Melyn\",\n  \"Magenta\": \"Piws\",\n  \"Cyan\": \"Cyan\",\n  \"Background\": \"Cefndir\",\n  \"Window\": \"Ffenestr\",\n  \"Transparent\": \"Tryloyw\",\n  \"Semi-Transparent\": \"Hanner-dryloyw\",\n  \"Opaque\": \"Di-draidd\",\n  \"Font Size\": \"Maint y Ffont\",\n  \"Text Edge Style\": \"Arddull Ymylon Testun\",\n  \"None\": \"Dim\",\n  \"Raised\": \"Uwch\",\n  \"Depressed\": \"Is\",\n  \"Uniform\": \"Unffurf\",\n  \"Dropshadow\": \"Cysgod cefn\",\n  \"Font Family\": \"Teulu y Ffont\",\n  \"Proportional Sans-Serif\": \"Heb-Seriff Cyfraneddol\",\n  \"Monospace Sans-Serif\": \"Heb-Seriff Unlled\",\n  \"Proportional Serif\": \"Seriff Gyfraneddol\",\n  \"Monospace Serif\": \"Seriff Unlled\",\n  \"Casual\": \"Llawysgrif\",\n  \"Script\": \"Sgript\",\n  \"Small Caps\": \"Prif Lythyrennau Bychain\",\n  \"Reset\": \"Ailosod\",\n  \"restore all settings to the default values\": \"Adfer yr holl osodiadau diofyn\",\n  \"Done\": \"Gorffenwyd\",\n  \"Caption Settings Dialog\": \"Blwch Gosodiadau Capsiynau\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"Dechrau ffenestr deialog. Bydd Escape yn canslo a chau'r ffenestr.\",\n  \"End of dialog window.\": \"Diwedd ffenestr deialog.\",\n  \"{1} is loading.\": \"{1} yn llwytho.\"\n});","videojs.addLanguage('da', {\n  \"Play\": \"Afspil\",\n  \"Pause\": \"Pause\",\n  \"Current Time\": \"Aktuel tid\",\n  \"Duration\": \"Varighed\",\n  \"Remaining Time\": \"Resterende tid\",\n  \"Stream Type\": \"Stream-type\",\n  \"LIVE\": \"LIVE\",\n  \"Loaded\": \"Indlæst\",\n  \"Progress\": \"Status\",\n  \"Fullscreen\": \"Fuldskærm\",\n  \"Non-Fullscreen\": \"Luk fuldskærm\",\n  \"Mute\": \"Uden lyd\",\n  \"Unmute\": \"Med lyd\",\n  \"Playback Rate\": \"Afspilningsrate\",\n  \"Subtitles\": \"Undertekster\",\n  \"subtitles off\": \"Uden undertekster\",\n  \"Captions\": \"Undertekster for hørehæmmede\",\n  \"captions off\": \"Uden undertekster for hørehæmmede\",\n  \"Chapters\": \"Kapitler\",\n  \"You aborted the media playback\": \"Du afbrød videoafspilningen.\",\n  \"A network error caused the media download to fail part-way.\": \"En netværksfejl fik download af videoen til at fejle.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"Videoen kunne ikke indlæses, enten fordi serveren eller netværket fejlede, eller fordi formatet ikke er understøttet.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"Videoafspilningen blev afbrudt på grund af ødelagte data eller fordi videoen benyttede faciliteter som din browser ikke understøtter.\",\n  \"No compatible source was found for this media.\": \"Fandt ikke en kompatibel kilde for denne media.\"\n});","videojs.addLanguage('de', {\n  \"Play\": \"Wiedergabe\",\n  \"Pause\": \"Pause\",\n  \"Replay\": \"Erneut abspielen\",\n  \"Current Time\": \"Aktueller Zeitpunkt\",\n  \"Duration\": \"Dauer\",\n  \"Remaining Time\": \"Verbleibende Zeit\",\n  \"Stream Type\": \"Streamtyp\",\n  \"LIVE\": \"LIVE\",\n  \"Loaded\": \"Geladen\",\n  \"Progress\": \"Status\",\n  \"Fullscreen\": \"Vollbild\",\n  \"Non-Fullscreen\": \"Vollbildmodus beenden\",\n  \"Mute\": \"Ton aus\",\n  \"Unmute\": \"Ton ein\",\n  \"Playback Rate\": \"Wiedergabegeschwindigkeit\",\n  \"Subtitles\": \"Untertitel\",\n  \"subtitles off\": \"Untertitel aus\",\n  \"Captions\": \"Untertitel\",\n  \"captions off\": \"Untertitel aus\",\n  \"Chapters\": \"Kapitel\",\n  \"You aborted the media playback\": \"Sie haben die Videowiedergabe abgebrochen.\",\n  \"A network error caused the media download to fail part-way.\": \"Der Videodownload ist aufgrund eines Netzwerkfehlers fehlgeschlagen.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"Das Video konnte nicht geladen werden, da entweder ein Server- oder Netzwerkfehler auftrat oder das Format nicht unterstützt wird.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"Die Videowiedergabe wurde entweder wegen eines Problems mit einem beschädigten Video oder wegen verwendeten Funktionen, die vom Browser nicht unterstützt werden, abgebrochen.\",\n  \"No compatible source was found for this media.\": \"Für dieses Video wurde keine kompatible Quelle gefunden.\",\n  \"Play Video\": \"Video abspielen\",\n  \"Close\": \"Schließen\",\n  \"Modal Window\": \"Modales Fenster\",\n  \"This is a modal window\": \"Dies ist ein modales Fenster\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"Durch Drücken der Esc-Taste bzw. Betätigung der Schaltfläche \\\"Schließen\\\" wird dieses modale Fenster geschlossen.\",\n  \", opens captions settings dialog\": \", öffnet Einstellungen für Untertitel\",\n  \", opens subtitles settings dialog\": \", öffnet Einstellungen für Untertitel\",\n  \", selected\": \", ausgewählt\",\n  \"captions settings\": \"Untertiteleinstellungen\",\n  \"subtitles settings\": \"Untertiteleinstellungen\",\n  \"descriptions settings\": \"Einstellungen für Beschreibungen\",\n  \"Close Modal Dialog\": \"Modales Fenster schließen\",\n  \"Descriptions\": \"Beschreibungen\",\n  \"descriptions off\": \"Beschreibungen aus\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"Die Entschlüsselungsschlüssel für den verschlüsselten Medieninhalt sind nicht verfügbar.\",\n  \", opens descriptions settings dialog\": \", öffnet Einstellungen für Beschreibungen\",\n  \"Audio Track\": \"Tonspur\",\n  \"Text\": \"Schrift\",\n  \"White\": \"Weiß\",\n  \"Black\": \"Schwarz\",\n  \"Red\": \"Rot\",\n  \"Green\": \"Grün\",\n  \"Blue\": \"Blau\",\n  \"Yellow\": \"Gelb\",\n  \"Magenta\": \"Magenta\",\n  \"Cyan\": \"Türkis\",\n  \"Background\": \"Hintergrund\",\n  \"Window\": \"Fenster\",\n  \"Transparent\": \"Durchsichtig\",\n  \"Semi-Transparent\": \"Halbdurchsichtig\",\n  \"Opaque\": \"Undurchsichtig\",\n  \"Font Size\": \"Schriftgröße\",\n  \"Text Edge Style\": \"Textkantenstil\",\n  \"None\": \"Kein\",\n  \"Raised\": \"Erhoben\",\n  \"Depressed\": \"Gedrückt\",\n  \"Uniform\": \"Uniform\",\n  \"Dropshadow\": \"Schlagschatten\",\n  \"Font Family\": \"Schriftfamilie\",\n  \"Proportional Sans-Serif\": \"Proportionale Sans-Serif\",\n  \"Monospace Sans-Serif\": \"Monospace Sans-Serif\",\n  \"Proportional Serif\": \"Proportionale Serif\",\n  \"Monospace Serif\": \"Monospace Serif\",\n  \"Casual\": \"Zwanglos\",\n  \"Script\": \"Schreibschrift\",\n  \"Small Caps\": \"Small-Caps\",\n  \"Reset\": \"Zurücksetzen\",\n  \"restore all settings to the default values\": \"Alle Einstellungen auf die Standardwerte zurücksetzen\",\n  \"Done\": \"Fertig\",\n  \"Caption Settings Dialog\": \"Einstellungsdialog für Untertitel\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"Anfang des Dialogfensters. Esc bricht ab und schließt das Fenster.\",\n  \"End of dialog window.\": \"Ende des Dialogfensters.\",\n  \"Audio Player\": \"Audio-Player\",\n  \"Video Player\": \"Video-Player\",\n  \"Progress Bar\": \"Fortschrittsbalken\",\n  \"progress bar timing: currentTime={1} duration={2}\": \"{1} von {2}\",\n  \"Volume Level\": \"Lautstärke\",\n  \"{1} is loading.\": \"{1} wird geladen.\",\n  \"Seek to live, currently behind live\": \"Zur Live-Übertragung wechseln. Aktuell wird es nicht live abgespielt.\",\n  \"Seek to live, currently playing live\": \"Zur Live-Übertragung wechseln. Es wird aktuell live abgespielt.\",\n  \"Exit Picture-in-Picture\": \"Bild-im-Bild-Modus beenden\",\n  \"Picture-in-Picture\": \"Bild-im-Bild-Modus\"\n});","videojs.addLanguage('el', {\n  \"Play\": \"Aναπαραγωγή\",\n  \"Pause\": \"Παύση\",\n  \"Current Time\": \"Τρέχων χρόνος\",\n  \"Duration\": \"Συνολικός χρόνος\",\n  \"Remaining Time\": \"Υπολοιπόμενος χρόνος\",\n  \"Stream Type\": \"Τύπος ροής\",\n  \"LIVE\": \"ΖΩΝΤΑΝΑ\",\n  \"Loaded\": \"Φόρτωση επιτυχής\",\n  \"Progress\": \"Πρόοδος\",\n  \"Fullscreen\": \"Πλήρης οθόνη\",\n  \"Non-Fullscreen\": \"Έξοδος από πλήρη οθόνη\",\n  \"Mute\": \"Σίγαση\",\n  \"Unmute\": \"Kατάργηση σίγασης\",\n  \"Playback Rate\": \"Ρυθμός αναπαραγωγής\",\n  \"Subtitles\": \"Υπότιτλοι\",\n  \"subtitles off\": \"απόκρυψη υπότιτλων\",\n  \"Captions\": \"Λεζάντες\",\n  \"captions off\": \"απόκρυψη λεζάντων\",\n  \"Chapters\": \"Κεφάλαια\",\n  \"Close Modal Dialog\": \"Κλείσιμο παραθύρου\",\n  \"Descriptions\": \"Περιγραφές\",\n  \"descriptions off\": \"απόκρυψη περιγραφών\",\n  \"Audio Track\": \"Ροή ήχου\",\n  \"You aborted the media playback\": \"Ακυρώσατε την αναπαραγωγή\",\n  \"A network error caused the media download to fail part-way.\": \"Ένα σφάλμα δικτύου προκάλεσε την αποτυχία μεταφόρτωσης του αρχείου προς αναπαραγωγή.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"Το αρχείο προς αναπαραγωγή δεν ήταν δυνατό να φορτωθεί είτε γιατί υπήρξε σφάλμα στον διακομιστή ή το δίκτυο, είτε γιατί ο τύπος του αρχείου δεν υποστηρίζεται.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"Η αναπαραγωγή ακυρώθηκε είτε λόγω κατεστραμμένου αρχείου, είτε γιατί το αρχείο απαιτεί λειτουργίες που δεν υποστηρίζονται από το πρόγραμμα περιήγησης που χρησιμοποιείτε.\",\n  \"No compatible source was found for this media.\": \"Δεν βρέθηκε συμβατή πηγή αναπαραγωγής για το συγκεκριμένο αρχείο.\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"Το αρχείο προς αναπαραγωγή είναι κρυπτογραφημένo και δεν υπάρχουν τα απαραίτητα κλειδιά αποκρυπτογράφησης.\",\n  \"Play Video\": \"Αναπαραγωγή βίντεο\",\n  \"Close\": \"Κλείσιμο\",\n  \"Modal Window\": \"Aναδυόμενο παράθυρο\",\n  \"This is a modal window\": \"Το παρών είναι ένα αναδυόμενο παράθυρο\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"Αυτό το παράθυρο μπορεί να εξαφανιστεί πατώντας το πλήκτρο Escape ή πατώντας το κουμπί κλεισίματος.\",\n  \", opens captions settings dialog\": \", εμφανίζει τις ρυθμίσεις για τις λεζάντες\",\n  \", opens subtitles settings dialog\": \", εμφανίζει τις ρυθμίσεις για τους υπότιτλους\",\n  \", opens descriptions settings dialog\": \", εμφανίζει τις ρυθμίσεις για τις περιγραφές\",\n  \", selected\": \", επιλεγμένο\"\n});","videojs.addLanguage('en', {\n  \"Audio Player\": \"Audio Player\",\n  \"Video Player\": \"Video Player\",\n  \"Play\": \"Play\",\n  \"Pause\": \"Pause\",\n  \"Replay\": \"Replay\",\n  \"Current Time\": \"Current Time\",\n  \"Duration\": \"Duration\",\n  \"Remaining Time\": \"Remaining Time\",\n  \"Stream Type\": \"Stream Type\",\n  \"LIVE\": \"LIVE\",\n  \"Seek to live, currently behind live\": \"Seek to live, currently behind live\",\n  \"Seek to live, currently playing live\": \"Seek to live, currently playing live\",\n  \"Loaded\": \"Loaded\",\n  \"Progress\": \"Progress\",\n  \"Progress Bar\": \"Progress Bar\",\n  \"progress bar timing: currentTime={1} duration={2}\": \"{1} of {2}\",\n  \"Fullscreen\": \"Fullscreen\",\n  \"Non-Fullscreen\": \"Exit Fullscreen\",\n  \"Mute\": \"Mute\",\n  \"Unmute\": \"Unmute\",\n  \"Playback Rate\": \"Playback Rate\",\n  \"Subtitles\": \"Subtitles\",\n  \"subtitles off\": \"subtitles off\",\n  \"Captions\": \"Captions\",\n  \"captions off\": \"captions off\",\n  \"Chapters\": \"Chapters\",\n  \"Descriptions\": \"Descriptions\",\n  \"descriptions off\": \"descriptions off\",\n  \"Audio Track\": \"Audio Track\",\n  \"Volume Level\": \"Volume Level\",\n  \"You aborted the media playback\": \"You aborted the media playback\",\n  \"A network error caused the media download to fail part-way.\": \"A network error caused the media download to fail part-way.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"The media could not be loaded, either because the server or network failed or because the format is not supported.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\",\n  \"No compatible source was found for this media.\": \"No compatible source was found for this media.\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"The media is encrypted and we do not have the keys to decrypt it.\",\n  \"Play Video\": \"Play Video\",\n  \"Close\": \"Close\",\n  \"Close Modal Dialog\": \"Close Modal Dialog\",\n  \"Modal Window\": \"Modal Window\",\n  \"This is a modal window\": \"This is a modal window\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"This modal can be closed by pressing the Escape key or activating the close button.\",\n  \", opens captions settings dialog\": \", opens captions settings dialog\",\n  \", opens subtitles settings dialog\": \", opens subtitles settings dialog\",\n  \", opens descriptions settings dialog\": \", opens descriptions settings dialog\",\n  \", selected\": \", selected\",\n  \"captions settings\": \"captions settings\",\n  \"subtitles settings\": \"subtitles settings\",\n  \"descriptions settings\": \"descriptions settings\",\n  \"Text\": \"Text\",\n  \"White\": \"White\",\n  \"Black\": \"Black\",\n  \"Red\": \"Red\",\n  \"Green\": \"Green\",\n  \"Blue\": \"Blue\",\n  \"Yellow\": \"Yellow\",\n  \"Magenta\": \"Magenta\",\n  \"Cyan\": \"Cyan\",\n  \"Background\": \"Background\",\n  \"Window\": \"Window\",\n  \"Transparent\": \"Transparent\",\n  \"Semi-Transparent\": \"Semi-Transparent\",\n  \"Opaque\": \"Opaque\",\n  \"Font Size\": \"Font Size\",\n  \"Text Edge Style\": \"Text Edge Style\",\n  \"None\": \"None\",\n  \"Raised\": \"Raised\",\n  \"Depressed\": \"Depressed\",\n  \"Uniform\": \"Uniform\",\n  \"Dropshadow\": \"Dropshadow\",\n  \"Font Family\": \"Font Family\",\n  \"Proportional Sans-Serif\": \"Proportional Sans-Serif\",\n  \"Monospace Sans-Serif\": \"Monospace Sans-Serif\",\n  \"Proportional Serif\": \"Proportional Serif\",\n  \"Monospace Serif\": \"Monospace Serif\",\n  \"Casual\": \"Casual\",\n  \"Script\": \"Script\",\n  \"Small Caps\": \"Small Caps\",\n  \"Reset\": \"Reset\",\n  \"restore all settings to the default values\": \"restore all settings to the default values\",\n  \"Done\": \"Done\",\n  \"Caption Settings Dialog\": \"Caption Settings Dialog\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"Beginning of dialog window. Escape will cancel and close the window.\",\n  \"End of dialog window.\": \"End of dialog window.\",\n  \"{1} is loading.\": \"{1} is loading.\",\n  \"Exit Picture-in-Picture\": \"Exit Picture-in-Picture\",\n  \"Picture-in-Picture\": \"Picture-in-Picture\"\n});","videojs.addLanguage('es', {\n  \"Play\": \"Reproducir\",\n  \"Play Video\": \"Reproducir Vídeo\",\n  \"Pause\": \"Pausa\",\n  \"Current Time\": \"Tiempo reproducido\",\n  \"Duration\": \"Duración total\",\n  \"Remaining Time\": \"Tiempo restante\",\n  \"Stream Type\": \"Tipo de secuencia\",\n  \"LIVE\": \"DIRECTO\",\n  \"Loaded\": \"Cargado\",\n  \"Progress\": \"Progreso\",\n  \"Fullscreen\": \"Pantalla completa\",\n  \"Non-Fullscreen\": \"Pantalla no completa\",\n  \"Mute\": \"Silenciar\",\n  \"Unmute\": \"No silenciado\",\n  \"Playback Rate\": \"Velocidad de reproducción\",\n  \"Subtitles\": \"Subtítulos\",\n  \"subtitles off\": \"Subtítulos desactivados\",\n  \"Captions\": \"Subtítulos especiales\",\n  \"captions off\": \"Subtítulos especiales desactivados\",\n  \"Chapters\": \"Capítulos\",\n  \"You aborted the media playback\": \"Ha interrumpido la reproducción del vídeo.\",\n  \"A network error caused the media download to fail part-way.\": \"Un error de red ha interrumpido la descarga del vídeo.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"No se ha podido cargar el vídeo debido a un fallo de red o del servidor o porque el formato es incompatible.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"La reproducción de vídeo se ha interrumpido por un problema de corrupción de datos o porque el vídeo precisa funciones que su navegador no ofrece.\",\n  \"No compatible source was found for this media.\": \"No se ha encontrado ninguna fuente compatible con este vídeo.\",\n  \"Audio Player\": \"Reproductor de audio\",\n  \"Video Player\": \"Reproductor de video\",\n  \"Replay\": \"Volver a reproducir\",\n  \"Seek to live, currently behind live\": \"Buscar en vivo, actualmente demorado con respecto a la transmisión en vivo\",\n  \"Seek to live, currently playing live\": \"Buscar en vivo, actualmente reproduciendo en vivo\",\n  \"Progress Bar\": \"Barra de progreso\",\n  \"progress bar timing: currentTime={1} duration={2}\": \"{1} de {2}\",\n  \"Descriptions\": \"Descripciones\",\n  \"descriptions off\": \"descripciones desactivadas\",\n  \"Audio Track\": \"Pista de audio\",\n  \"Volume Level\": \"Nivel de volumen\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"El material audiovisual está cifrado y no tenemos las claves para descifrarlo.\",\n  \"Close\": \"Cerrar\",\n  \"Modal Window\": \"Ventana modal\",\n  \"This is a modal window\": \"Esta es una ventana modal\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"Esta ventana modal puede cerrarse presionando la tecla Escape o activando el botón de cierre.\",\n  \", opens captions settings dialog\": \", abre el diálogo de configuración de leyendas\",\n  \", opens subtitles settings dialog\": \", abre el diálogo de configuración de subtítulos\",\n  \", selected\": \", seleccionado\",\n  \"Close Modal Dialog\": \"Cierra cuadro de diálogo modal\",\n  \", opens descriptions settings dialog\": \", abre el diálogo de configuración de las descripciones\",\n  \"captions settings\": \"configuración de leyendas\",\n  \"subtitles settings\": \"configuración de subtítulos\",\n  \"descriptions settings\": \"configuración de descripciones\",\n  \"Text\": \"Texto\",\n  \"White\": \"Blanco\",\n  \"Black\": \"Negro\",\n  \"Red\": \"Rojo\",\n  \"Green\": \"Verde\",\n  \"Blue\": \"Azul\",\n  \"Yellow\": \"Amarillo\",\n  \"Magenta\": \"Magenta\",\n  \"Cyan\": \"Cian\",\n  \"Background\": \"Fondo\",\n  \"Window\": \"Ventana\",\n  \"Transparent\": \"Transparente\",\n  \"Semi-Transparent\": \"Semitransparente\",\n  \"Opaque\": \"Opaca\",\n  \"Font Size\": \"Tamaño de fuente\",\n  \"Text Edge Style\": \"Estilo de borde del texto\",\n  \"None\": \"Ninguno\",\n  \"Raised\": \"En relieve\",\n  \"Depressed\": \"Hundido\",\n  \"Uniform\": \"Uniforme\",\n  \"Dropshadow\": \"Sombra paralela\",\n  \"Font Family\": \"Familia de fuente\",\n  \"Proportional Sans-Serif\": \"Sans-Serif proporcional\",\n  \"Monospace Sans-Serif\": \"Sans-Serif monoespacio\",\n  \"Proportional Serif\": \"Serif proporcional\",\n  \"Monospace Serif\": \"Serif monoespacio\",\n  \"Casual\": \"Informal\",\n  \"Script\": \"Cursiva\",\n  \"Small Caps\": \"Minúsculas\",\n  \"Reset\": \"Restablecer\",\n  \"restore all settings to the default values\": \"restablece todas las configuraciones a los valores predeterminados\",\n  \"Done\": \"Listo\",\n  \"Caption Settings Dialog\": \"Diálogo de configuración de leyendas\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"Comienzo de la ventana de diálogo. La tecla Escape cancelará la operación y cerrará la ventana.\",\n  \"End of dialog window.\": \"Final de la ventana de diálogo.\",\n  \"{1} is loading.\": \"{1} se está cargando.\",\n  \"Exit Picture-in-Picture\": \"Salir de imagen sobre imagen\",\n  \"Picture-in-Picture\": \"Imagen sobre imagen\"\n});","videojs.addLanguage('fa', {\n  \"Audio Player\": \"پخش کننده صوت\",\n  \"Video Player\": \"پخش کننده ویدیو\",\n  \"Play\": \"پخش\",\n  \"Pause\": \"توقف\",\n  \"Replay\": \"پخش مجدد\",\n  \"Current Time\": \"زمان فعلی\",\n  \"Duration\": \"مدت\",\n  \"Remaining Time\": \"زمان باقی‌مانده\",\n  \"Stream Type\": \"نوع استریم\",\n  \"LIVE\": \"زنده\",\n  \"Seek to live, currently behind live\": \"پخش زنده، هم اکنون عقب تر از پخش زنده\",\n  \"Seek to live, currently playing live\": \"پخش زنده، در حال پخش زنده\",\n  \"Loaded\": \"بارگیری شده\",\n  \"Progress\": \"پیشرفت\",\n  \"Progress Bar\": \"نوار پیشرفت\",\n  \"progress bar timing: currentTime={1} duration={2}\": \"{1} از {2}\",\n  \"Fullscreen\": \"تمام‌صفحه\",\n  \"Non-Fullscreen\": \"غیر تمام‌صفحه\",\n  \"Mute\": \"بی صدا\",\n  \"Unmute\": \"صدادار\",\n  \"Playback Rate\": \"سرعت پخش\",\n  \"Subtitles\": \"زیرنویس ها\",\n  \"subtitles off\": \"بدون زیرنویس\",\n  \"Captions\": \"توضیحات\",\n  \"captions off\": \"بدون توضیحات\",\n  \"Chapters\": \"بخش‌ها\",\n  \"Descriptions\": \"توصیفات\",\n  \"descriptions off\": \"بدون توصیفات\",\n  \"Audio Track\": \"ترَک صوتی\",\n  \"Volume Level\": \"سطح صدا\",\n  \"You aborted the media playback\": \"شما پخش رسانه را قطع نمودید\",\n  \"A network error caused the media download to fail part-way.\": \"وقوع مشکلی در شبکه باعث اختلال در دانلود رسانه شد.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \".رسانه قابل بارگیری نیست. ممکن است مشکلی در شبکه یا سرور رخ داده باشد یا فرمت رسانه در دستگاه شما پشتیبانی نشود\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"پخش  رسانه به علت اشکال در آن یا عدم پشتیبانی مرورگر شما قطع شد.\",\n  \"No compatible source was found for this media.\": \"هیچ منبع سازگاری برای پخش این رسانه پیدا نشد.\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"این رسانه رمزنگاری شده است و کلیدهای رمزگشایی آن موجود نیست.\",\n  \"Play Video\": \"پخش ویدیو\",\n  \"Close\": \"بستن\",\n  \"Close Modal Dialog\": \"بستن پنجره\",\n  \"Modal Window\": \"پنجره محاوره\",\n  \"This is a modal window\": \"این پنجره قابل بستن است\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"این پنجره با کلید Escape یا دکمه بستن قابل بسته شدن میباشد.\",\n  \", opens captions settings dialog\": \", تنظیمات توضیجات را باز میکند\",\n  \", opens subtitles settings dialog\": \", تنظیمات زیرنویس را باز میکند\",\n  \", opens descriptions settings dialog\": \", تنظیمات توصیفات را باز میکند\",\n  \", selected\": \"، انتخاب شد\",\n  \"captions settings\": \"تنظیمات توضیحات\",\n  \"subtitles settings\": \"تنظیمات زیرنویس\",\n  \"descriptions settings\": \"تنظیمات توصیفات\",\n  \"Text\": \"متن\",\n  \"White\": \"سفید\",\n  \"Black\": \"سیاه\",\n  \"Red\": \"قرمز\",\n  \"Green\": \"سبز\",\n  \"Blue\": \"آبی\",\n  \"Yellow\": \"زرد\",\n  \"Magenta\": \"ارغوانی\",\n  \"Cyan\": \"فیروزه‌ای\",\n  \"Background\": \"پس زمینه\",\n  \"Window\": \"پنجره\",\n  \"Transparent\": \"شفاف\",\n  \"Semi-Transparent\": \"نیمه شفاف\",\n  \"Opaque\": \"مات\",\n  \"Font Size\": \"اندازه قلم\",\n  \"Text Edge Style\": \"سبک لبه متن\",\n  \"None\": \"هیچ\",\n  \"Raised\": \"برجسته\",\n  \"Depressed\": \"فرورفته\",\n  \"Uniform\": \"یکنواخت\",\n  \"Dropshadow\": \"سایه دار\",\n  \"Font Family\": \"نوع قلم\",\n  \"Proportional Sans-Serif\": \"Sans-Serif متناسب\",\n  \"Monospace Sans-Serif\": \"Sans-Serif هم عرض\",\n  \"Proportional Serif\": \"Serif متناسب\",\n  \"Monospace Serif\": \"Serif هم عرض\",\n  \"Casual\": \"فانتزی\",\n  \"Script\": \"دست خط\",\n  \"Small Caps\": \"حروف بزرگ کوچک\",\n  \"Reset\": \"تنظیم مجدد\",\n  \"restore all settings to the default values\": \"بازنشانی همه تنظیمات به مقادیر پیش‌فرض\",\n  \"Done\": \"انجام\",\n  \"Caption Settings Dialog\": \"پنجره تنظیمات توضیحات\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"شروع پنجره محاوره‌ای. دکمه Escape عملیات را لغو کرده و پنجره را میبندد.\",\n  \"End of dialog window.\": \"پایان پنجره محاوره‌ای.\",\n  \"{1} is loading.\": \"{1} در حال بارگیری است.\",\n  \"Exit Picture-in-Picture\": \"خروج از حالت تصویر در تصویر\",\n  \"Picture-in-Picture\": \"تصویر در تصویر\"\n});","videojs.addLanguage('fi', {\n  \"Play\": \"Toisto\",\n  \"Pause\": \"Tauko\",\n  \"Current Time\": \"Tämänhetkinen aika\",\n  \"Duration\": \"Kokonaisaika\",\n  \"Remaining Time\": \"Jäljellä oleva aika\",\n  \"Stream Type\": \"Lähetystyyppi\",\n  \"LIVE\": \"LIVE\",\n  \"Loaded\": \"Ladattu\",\n  \"Progress\": \"Edistyminen\",\n  \"Fullscreen\": \"Koko näyttö\",\n  \"Non-Fullscreen\": \"Koko näyttö pois\",\n  \"Mute\": \"Ääni pois\",\n  \"Unmute\": \"Ääni päällä\",\n  \"Playback Rate\": \"Toistonopeus\",\n  \"Subtitles\": \"Tekstitys\",\n  \"subtitles off\": \"Tekstitys pois\",\n  \"Captions\": \"Tekstitys\",\n  \"captions off\": \"Tekstitys pois\",\n  \"Chapters\": \"Kappaleet\",\n  \"You aborted the media playback\": \"Olet keskeyttänyt videotoiston.\",\n  \"A network error caused the media download to fail part-way.\": \"Verkkovirhe keskeytti videon latauksen.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"Videon lataus ei onnistunut joko palvelin- tai verkkovirheestä tai väärästä formaatista johtuen.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"Videon toisto keskeytyi, koska media on vaurioitunut tai käyttää käyttää toimintoja, joita selaimesi ei tue.\",\n  \"No compatible source was found for this media.\": \"Tälle videolle ei löytynyt yhteensopivaa lähdettä.\"\n});","videojs.addLanguage('fr', {\n  \"Audio Player\": \"Lecteur audio\",\n  \"Video Player\": \"Lecteur vidéo\",\n  \"Play\": \"Lecture\",\n  \"Pause\": \"Pause\",\n  \"Replay\": \"Revoir\",\n  \"Current Time\": \"Temps actuel\",\n  \"Duration\": \"Durée\",\n  \"Remaining Time\": \"Temps restant\",\n  \"Stream Type\": \"Type de flux\",\n  \"LIVE\": \"EN DIRECT\",\n  \"Loaded\": \"Chargé\",\n  \"Progress\": \"Progression\",\n  \"Progress Bar\": \"Barre de progression\",\n  \"progress bar timing: currentTime={1} duration={2}\": \"{1} de {2}\",\n  \"Fullscreen\": \"Plein écran\",\n  \"Non-Fullscreen\": \"Fenêtré\",\n  \"Mute\": \"Sourdine\",\n  \"Unmute\": \"Son activé\",\n  \"Playback Rate\": \"Vitesse de lecture\",\n  \"Subtitles\": \"Sous-titres\",\n  \"subtitles off\": \"Sous-titres désactivés\",\n  \"Captions\": \"Sous-titres transcrits\",\n  \"captions off\": \"Sous-titres transcrits désactivés\",\n  \"Chapters\": \"Chapitres\",\n  \"Descriptions\": \"Descriptions\",\n  \"descriptions off\": \"descriptions désactivées\",\n  \"Audio Track\": \"Piste audio\",\n  \"Volume Level\": \"Niveau de volume\",\n  \"You aborted the media playback\": \"Vous avez interrompu la lecture de la vidéo.\",\n  \"A network error caused the media download to fail part-way.\": \"Une erreur de réseau a interrompu le téléchargement de la vidéo.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"Cette vidéo n'a pas pu être chargée, soit parce que le serveur ou le réseau a échoué ou parce que le format n'est pas reconnu.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"La lecture de la vidéo a été interrompue à cause d'un problème de corruption ou parce que la vidéo utilise des fonctionnalités non prises en charge par votre navigateur.\",\n  \"No compatible source was found for this media.\": \"Aucune source compatible n'a été trouvée pour cette vidéo.\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"Le média est chiffré et nous n'avons pas les clés pour le déchiffrer.\",\n  \"Play Video\": \"Lire la vidéo\",\n  \"Close\": \"Fermer\",\n  \"Close Modal Dialog\": \"Fermer la boîte de dialogue modale\",\n  \"Modal Window\": \"Fenêtre modale\",\n  \"This is a modal window\": \"Ceci est une fenêtre modale\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"Ce modal peut être fermé en appuyant sur la touche Échap ou activer le bouton de fermeture.\",\n  \", opens captions settings dialog\": \", ouvrir les paramètres des sous-titres transcrits\",\n  \", opens subtitles settings dialog\": \", ouvrir les paramètres des sous-titres\",\n  \", opens descriptions settings dialog\": \", ouvrir les paramètres des descriptions\",\n  \", selected\": \", sélectionné\",\n  \"captions settings\": \"Paramètres des sous-titres transcrits\",\n  \"subtitles settings\": \"Paramètres des sous-titres\",\n  \"descriptions settings\": \"Paramètres des descriptions\",\n  \"Text\": \"Texte\",\n  \"White\": \"Blanc\",\n  \"Black\": \"Noir\",\n  \"Red\": \"Rouge\",\n  \"Green\": \"Vert\",\n  \"Blue\": \"Bleu\",\n  \"Yellow\": \"Jaune\",\n  \"Magenta\": \"Magenta\",\n  \"Cyan\": \"Cyan\",\n  \"Background\": \"Arrière-plan\",\n  \"Window\": \"Fenêtre\",\n  \"Transparent\": \"Transparent\",\n  \"Semi-Transparent\": \"Semi-transparent\",\n  \"Opaque\": \"Opaque\",\n  \"Font Size\": \"Taille des caractères\",\n  \"Text Edge Style\": \"Style des contours du texte\",\n  \"None\": \"Aucun\",\n  \"Raised\": \"Élevé\",\n  \"Depressed\": \"Enfoncé\",\n  \"Uniform\": \"Uniforme\",\n  \"Dropshadow\": \"Ombre portée\",\n  \"Font Family\": \"Famille de polices\",\n  \"Proportional Sans-Serif\": \"Polices à chasse variable sans empattement (Proportional Sans-Serif)\",\n  \"Monospace Sans-Serif\": \"Polices à chasse fixe sans empattement (Monospace Sans-Serif)\",\n  \"Proportional Serif\": \"Polices à chasse variable avec empattement (Proportional Serif)\",\n  \"Monospace Serif\": \"Polices à chasse fixe avec empattement (Monospace Serif)\",\n  \"Casual\": \"Manuscrite\",\n  \"Script\": \"Scripte\",\n  \"Small Caps\": \"Petites capitales\",\n  \"Reset\": \"Réinitialiser\",\n  \"restore all settings to the default values\": \"Restaurer tous les paramètres aux valeurs par défaut\",\n  \"Done\": \"Terminé\",\n  \"Caption Settings Dialog\": \"Boîte de dialogue des paramètres des sous-titres transcrits\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"Début de la fenêtre de dialogue. La touche d'échappement annulera et fermera la fenêtre.\",\n  \"End of dialog window.\": \"Fin de la fenêtre de dialogue.\",\n  \"Exit Picture-in-Picture \": \"Quitter le mode image dans l'image\",\n  \"Picture-in-Picture \": \"Image dans l'image\",\n  \"{1} is loading.\": \"{1} en cours de chargement.\"\n});","videojs.addLanguage('gd', {\n  \"Audio Player\": \"Cluicheadair fuaime\",\n  \"Video Player\": \"Cluicheadair video\",\n  \"Play\": \"Cluich\",\n  \"Pause\": \"Cuir ’na stad\",\n  \"Replay\": \"Cluich a-rithist\",\n  \"Current Time\": \"An ùine làithreach\",\n  \"Duration\": \"Faide\",\n  \"Remaining Time\": \"An ùine air fhàgail\",\n  \"Stream Type\": \"Seòrsa an t-sruthaidh\",\n  \"LIVE\": \"BEÒ\",\n  \"Seek to live, currently behind live\": \"A’ sireadh sruth beò ’s air dheireadh\",\n  \"Seek to live, currently playing live\": \"A’ sireadh sruth beò ’s ‘ga chluich\",\n  \"Loaded\": \"Air a luchdadh\",\n  \"Progress\": \"Adhartas\",\n  \"Progress Bar\": \"Bàr adhartais\",\n  \"progress bar timing: currentTime={1} duration={2}\": \"{1} à {2}\",\n  \"Fullscreen\": \"Làn-sgrìn\",\n  \"Non-Fullscreen\": \"Fàg modh làn-sgrìn\",\n  \"Mute\": \"Mùch\",\n  \"Unmute\": \"Dì-mhùch\",\n  \"Playback Rate\": \"Reat na cluiche\",\n  \"Subtitles\": \"Fo-thiotalan\",\n  \"subtitles off\": \"fo-thiotalan dheth\",\n  \"Captions\": \"Caipseanan\",\n  \"captions off\": \"caipseanan dheth\",\n  \"Chapters\": \"Caibideil\",\n  \"Descriptions\": \"Tuairisgeulan\",\n  \"descriptions off\": \"tuairisgeulan dheth\",\n  \"Audio Track\": \"Traca fuaime\",\n  \"Volume Level\": \"Àirde na fuaime\",\n  \"You aborted the media playback\": \"Sguir thu de chluich a’ mheadhain\",\n  \"A network error caused the media download to fail part-way.\": \"Cha deach leinn an còrr dhen mheadhan a luchdadh a-nuas ri linn mearachd lìonraidh.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"Cha b’ urrainn dhuinn am meadhan a luchdadh – dh’fhaoidte gun do dh’fhàillig leis an fhrithealaiche no an lìonra no nach cuir sinn taic ris an fhòrmat.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"Sguir sinn de chluich a’ mheadhain – dh’fhaoidte gu bheil e coirbte no gu bheil gleus aig a’ mheadhan nach cuir am brabhsair taic ris.\",\n  \"No compatible source was found for this media.\": \"Cha ceach tùs co-chòrdail a lorg airson a’ mheadhain seo.\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"Tha am meadhan crioptaichte ’s chan eil iuchair dì-chrioptachaidh againn dha.\",\n  \"Play Video\": \"Cluich video\",\n  \"Close\": \"Dùin\",\n  \"Close Modal Dialog\": \"Dùin an còmhradh\",\n  \"Modal Window\": \"Uinneag mòdach\",\n  \"This is a modal window\": \"Seo uinneag mòdach\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"’S urrainn dhut seo a dhùnadh leis an iuchair Escape no leis a’ phutan dùnaidh.\",\n  \", opens captions settings dialog\": \", fosglaidh e còmhradh nan roghainnean\",\n  \", opens subtitles settings dialog\": \", fosglaidh e còmhradh nam fo-thiotalan\",\n  \", opens descriptions settings dialog\": \", fosglaidh e còmhradh roghainnean nan tuairisgeulan\",\n  \", selected\": \", air a thaghadh\",\n  \"captions settings\": \"roghainnean nan caipseanan\",\n  \"subtitles settings\": \"roghainnean nam fo-thiotalan\",\n  \"descriptions settings\": \"roghainnean nan tuairisgeulan\",\n  \"Text\": \"Teacsa\",\n  \"White\": \"Geal\",\n  \"Black\": \"Dubh\",\n  \"Red\": \"Dearg\",\n  \"Green\": \"Uaine\",\n  \"Blue\": \"Gorm\",\n  \"Yellow\": \"Buidhe\",\n  \"Magenta\": \"Magenta\",\n  \"Cyan\": \"Saidhean\",\n  \"Background\": \"Cùlaibh\",\n  \"Window\": \"Uinneag\",\n  \"Transparent\": \"Trìd-shoilleir\",\n  \"Semi-Transparent\": \"Leth-thrìd-shoilleir\",\n  \"Opaque\": \"Trìd-dhoilleir\",\n  \"Font Size\": \"Meud a’ chrutha-chlò\",\n  \"Text Edge Style\": \"Stoidhle oir an teacsa\",\n  \"None\": \"Chan eil gin\",\n  \"Raised\": \"Àrdaichte\",\n  \"Depressed\": \"Air a bhrùthadh\",\n  \"Uniform\": \"Cunbhalach\",\n  \"Dropshadow\": \"Sgàil\",\n  \"Font Family\": \"Teaghlach a’ chrutha-chlò\",\n  \"Proportional Sans-Serif\": \"Sans-serif co-rèireach\",\n  \"Monospace Sans-Serif\": \"Sans-serif aon-leud\",\n  \"Proportional Serif\": \"Serif co-rèireach\",\n  \"Monospace Serif\": \"Serif aon-leud\",\n  \"Casual\": \"Fuasgailte\",\n  \"Script\": \"Sgriobt\",\n  \"Small Caps\": \"Ceann-litrichean beaga\",\n  \"Reset\": \"Ath-shuidhich\",\n  \"restore all settings to the default values\": \"till dhan a h-uile bun-roghainn\",\n  \"Done\": \"Deiseil\",\n  \"Caption Settings Dialog\": \"Còmhradh roghainnean nan caipseanan\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"Toiseach uinneag còmhraidh. Sguiridh Escape dheth ’s dùinidh e an uinneag\",\n  \"End of dialog window.\": \"Deireadh uinneag còmhraidh.\",\n  \"{1} is loading.\": \"Tha {1} ’ga luchdadh.\"\n});","videojs.addLanguage('gl', {\n  \"Audio Player\": \"Reprodutor de son\",\n  \"Video Player\": \"Reprodutor de vídeo\",\n  \"Play\": \"Reproducir\",\n  \"Pause\": \"Pausa\",\n  \"Replay\": \"Repetir\",\n  \"Current Time\": \"Tempo reproducido\",\n  \"Duration\": \"Duración\",\n  \"Remaining Time\": \"Tempo restante\",\n  \"Stream Type\": \"Tipo de fluxo\",\n  \"LIVE\": \"EN DIRECTO\",\n  \"Seek to live, currently behind live\": \"Buscando directo, actualmente tras en directo\",\n  \"Seek to live, currently playing live\": \"Buscando directo, actualmente reproducindo en directo\",\n  \"Loaded\": \"Cargado\",\n  \"Progress\": \"Progresión\",\n  \"Progress Bar\": \"Barra de progreso\",\n  \"progress bar timing: currentTime={1} duration={2}\": \"{1} de {2}\",\n  \"Fullscreen\": \"Pantalla completa\",\n  \"Non-Fullscreen\": \"Xanela\",\n  \"Mute\": \"Silenciar\",\n  \"Unmute\": \"Son activado\",\n  \"Playback Rate\": \"Velocidade de reprodución\",\n  \"Subtitles\": \"Subtítulos\",\n  \"subtitles off\": \"subtítulos desactivados\",\n  \"Captions\": \"Subtítulos para xordos\",\n  \"captions off\": \"subtítulos para xordos desactivados\",\n  \"Chapters\": \"Capítulos\",\n  \"Descriptions\": \"Descricións\",\n  \"descriptions off\": \"descricións desactivadas\",\n  \"Audio Track\": \"Pista de son\",\n  \"Volume Level\": \"Nivel do volume\",\n  \"You aborted the media playback\": \"Vostede interrompeu a reprodución do medio.\",\n  \"A network error caused the media download to fail part-way.\": \"Un erro de rede interrompeu a descarga do medio.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"Non foi posíbel cargar o medio por mor dun fallo de rede ou do servidor ou porque o formato non é compatíbel.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"Interrompeuse a reprodución do medio por mor dun problema de estragamento dos datos ou porque o medio precisa funcións que o seu navegador non ofrece.\",\n  \"No compatible source was found for this media.\": \"Non se atopou ningunha orixe compatíbel con este vídeo.\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"O medio está cifrado e non temos as chaves para descifralo .\",\n  \"Play Video\": \"Reproducir vídeo\",\n  \"Close\": \"Pechar\",\n  \"Close Modal Dialog\": \"Pechar a caixa de diálogo modal\",\n  \"Modal Window\": \"Xanela modal\",\n  \"This is a modal window\": \"Esta é unha xanela modal\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"Este diálogo modal pódese pechar premendo a tecla Escape ou activando o botón de pechar.\",\n  \", opens captions settings dialog\": \", abre o diálogo de axustes dos subtítulos para xordos\",\n  \", opens subtitles settings dialog\": \", abre o diálogo de axustes dos subtítulos\",\n  \", opens descriptions settings dialog\": \", abre o diálogo de axustes das descricións\",\n  \", selected\": \", séleccionado\",\n  \"captions settings\": \"axustes dos subtítulos para xordos\",\n  \"subtitles settings\": \"axustes dos subtítulos\",\n  \"descriptions settings\": \"axustes das descricións\",\n  \"Text\": \"Texto\",\n  \"White\": \"Branco\",\n  \"Black\": \"Negro\",\n  \"Red\": \"Vermello\",\n  \"Green\": \"Verde\",\n  \"Blue\": \"Azul\",\n  \"Yellow\": \"Marelo\",\n  \"Magenta\": \"Maxenta\",\n  \"Cyan\": \"Cian\",\n  \"Background\": \"Fondo\",\n  \"Window\": \"Xanela\",\n  \"Transparent\": \"Transparente\",\n  \"Semi-Transparent\": \"Semi-transparente\",\n  \"Opaque\": \"Opaca\",\n  \"Font Size\": \"Tamaño das letras\",\n  \"Text Edge Style\": \"Estilo do bordos do texto\",\n  \"None\": \"Ningún\",\n  \"Raised\": \"Érguida\",\n  \"Depressed\": \"Caída\",\n  \"Uniform\": \"Uniforme\",\n  \"Dropshadow\": \"Sombra caída\",\n  \"Font Family\": \"Familia de letras\",\n  \"Proportional Sans-Serif\": \"Sans-Serif proporcional\",\n  \"Monospace Sans-Serif\": \"Sans-Serif monoespazo (caixa fixa)\",\n  \"Proportional Serif\": \"Serif proporcional\",\n  \"Monospace Serif\": \"Serif monoespazo (caixa fixa)\",\n  \"Casual\": \"Manuscrito\",\n  \"Script\": \"Itálica\",\n  \"Small Caps\": \"Pequenas maiúsculas\",\n  \"Reset\": \"Reiniciar\",\n  \"restore all settings to the default values\": \"restaurar todos os axustes aos valores predeterminados\",\n  \"Done\": \"Feito\",\n  \"Caption Settings Dialog\": \"Diálogo de axustes dos subtítulos para xordos\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"Inicio da xanela de diálogo. A tecla Escape cancelará e pechará a xanela.\",\n  \"End of dialog window.\": \"Fin da xanela de diálogo.\",\n  \"{1} is loading.\": \"{1} está a cargar.\"\n});","videojs.addLanguage('he', {\n  \"Audio Player\": \"נַגָּן שמע\",\n  \"Video Player\": \"נַגָּן וידאו\",\n  \"Play\": \"נַגֵּן\",\n  \"Pause\": \"השהה\",\n  \"Replay\": \"נַגֵּן שוב\",\n  \"Current Time\": \"זמן נוכחי\",\n  \"Duration\": \"זמן כולל\",\n  \"Remaining Time\": \"זמן נותר\",\n  \"Stream Type\": \"סוג Stream\",\n  \"LIVE\": \"שידור חי\",\n  \"Loaded\": \"נטען\",\n  \"Progress\": \"התקדמות\",\n  \"Progress Bar\": \"סרגל התקדמות\",\n  \"progress bar timing: currentTime={1} duration={2}\": \"{1} מתוך {2}\",\n  \"Fullscreen\": \"מסך מלא\",\n  \"Non-Fullscreen\": \"מסך לא מלא\",\n  \"Mute\": \"השתק\",\n  \"Unmute\": \"בטל השתקה\",\n  \"Playback Rate\": \"קצב ניגון\",\n  \"Subtitles\": \"כתוביות\",\n  \"subtitles off\": \"כתוביות כבויות\",\n  \"Captions\": \"כיתובים\",\n  \"captions off\": \"כיתובים כבויים\",\n  \"Chapters\": \"פרקים\",\n  \"Descriptions\": \"תיאורים\",\n  \"descriptions off\": \"תיאורים כבויים\",\n  \"Audio Track\": \"רצועת שמע\",\n  \"Volume Level\": \"רמת ווליום\",\n  \"You aborted the media playback\": \"ביטלת את השמעת המדיה\",\n  \"A network error caused the media download to fail part-way.\": \"שגיאת רשת גרמה להורדת המדיה להיכשל באמצע.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"לא ניתן לטעון את המדיה, או מכיוון שהרשת או השרת כשלו או מכיוון שהפורמט אינו נתמך.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"השמעת המדיה בוטלה בשל בעית השחטת מידע או מכיוון שהמדיה עשתה שימוש בתכונות שהדפדפן שלך לא תמך בהן.\",\n  \"No compatible source was found for this media.\": \"לא נמצא מקור תואם עבור מדיה זו.\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"המדיה מוצפנת ואין בידינו את המפתח כדי לפענח אותה.\",\n  \"Play Video\": \"נַגֵּן וידאו\",\n  \"Close\": \"סְגוֹר\",\n  \"Close Modal Dialog\": \"סְגוֹר דו-שיח מודאלי\",\n  \"Modal Window\": \"חלון מודאלי\",\n  \"This is a modal window\": \"זהו חלון מודאלי\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"ניתן לסגור חלון מודאלי זה ע\\\"י לחיצה על כפתור ה-Escape או הפעלת כפתור הסגירה.\",\n  \", opens captions settings dialog\": \", פותח חלון הגדרות כיתובים\",\n  \", opens subtitles settings dialog\": \", פותח חלון הגדרות כתוביות\",\n  \", opens descriptions settings dialog\": \", פותח חלון הגדרות תיאורים\",\n  \", selected\": \", נבחר/ו\",\n  \"captions settings\": \"הגדרות כיתובים\",\n  \"subtitles settings\": \"הגדרות כתוביות\",\n  \"descriptions settings\": \"הגדרות תיאורים\",\n  \"Text\": \"טקסט\",\n  \"White\": \"לבן\",\n  \"Black\": \"שחור\",\n  \"Red\": \"אדום\",\n  \"Green\": \"ירוק\",\n  \"Blue\": \"כחול\",\n  \"Yellow\": \"צהוב\",\n  \"Magenta\": \"מַגֶ'נטָה\",\n  \"Cyan\": \"טורקיז\",\n  \"Background\": \"רקע\",\n  \"Window\": \"חלון\",\n  \"Transparent\": \"שקוף\",\n  \"Semi-Transparent\": \"שקוף למחצה\",\n  \"Opaque\": \"אָטוּם\",\n  \"Font Size\": \"גודל גופן\",\n  \"Text Edge Style\": \"סגנון קצוות טקסט\",\n  \"None\": \"ללא\",\n  \"Raised\": \"מורם\",\n  \"Depressed\": \"מורד\",\n  \"Uniform\": \"אחיד\",\n  \"Dropshadow\": \"הטלת צל\",\n  \"Font Family\": \"משפחת גופן\",\n  \"Proportional Sans-Serif\": \"פרופורציוני וללא תגיות (Proportional Sans-Serif)\",\n  \"Monospace Sans-Serif\": \"ברוחב אחיד וללא תגיות (Monospace Sans-Serif)\",\n  \"Proportional Serif\": \"פרופורציוני ועם תגיות (Proportional Serif)\",\n  \"Monospace Serif\": \"ברוחב אחיד ועם תגיות (Monospace Serif)\",\n  \"Casual\": \"אַגָבִי\",\n  \"Script\": \"תסריט\",\n  \"Small Caps\": \"אותיות קטנות\",\n  \"Reset\": \"אִפּוּס\",\n  \"restore all settings to the default values\": \"שחזר את כל ההגדרות לערכי ברירת המחדל\",\n  \"Done\": \"בוצע\",\n  \"Caption Settings Dialog\": \"דו-שיח הגדרות כיתובים\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"תחילת חלון דו-שיח. Escape יבטל ויסגור את החלון\",\n  \"End of dialog window.\": \"סוף חלון דו-שיח.\"\n});","videojs.addLanguage('hi', {\n  \"Audio Player\": \"ऑडियो प्लेयर\",\n  \"Video Player\": \"वीडियो प्लेयर\",\n  \"Play\": \"चलाएँ\",\n  \"Pause\": \"रोके\",\n  \"Replay\": \"फिर से चलाएँ\",\n  \"Current Time\": \"वर्तमान समय\",\n  \"Duration\": \"अवधि\",\n  \"Remaining Time\": \"शेष समय\",\n  \"Stream Type\": \"स्ट्रीम प्रकार\",\n  \"LIVE\": \"लाइव\",\n  \"Seek to live, currently behind live\": \"छोड़कर लाइव प्रसारण पर आगे बढ़ें, अभी लाइव प्रसारण से पीछे हैं\",\n  \"Seek to live, currently playing live\": \"छोड़कर लाइव प्रसारण पर आगे बढ़ें, अभी लाइव चल रहा है\",\n  \"Loaded\": \"लोड हुआ\",\n  \"Progress\": \"प्रगति\",\n  \"Progress Bar\": \"प्रोगेस बार\",\n  \"progress bar timing: currentTime={1} duration={2}\": \"{2} में से {1}\",\n  \"Fullscreen\": \"फ़ुल स्क्रीन\",\n  \"Non-Fullscreen\": \"फ़ुल स्क्रीन से बाहर निकलें\",\n  \"Mute\": \"म्यूट करें\",\n  \"Unmute\": \"अनम्यूट करें\",\n  \"Playback Rate\": \"चलाने की दर\",\n  \"Subtitles\": \"उपशीर्षक\",\n  \"subtitles off\": \"उपशीर्षक बंद\",\n  \"Captions\": \"कैप्शन\",\n  \"captions off\": \"कैप्शन बंद\",\n  \"Chapters\": \"अध्याय\",\n  \"Descriptions\": \"विवरण\",\n  \"descriptions off\": \"विवरण बंद\",\n  \"Audio Track\": \"ऑडियो ट्रैक\",\n  \"Volume Level\": \"वॉल्यूम स्तर\",\n  \"You aborted the media playback\": \"आपने मीडिया प्लेबैक को रोक दिया\",\n  \"A network error caused the media download to fail part-way.\": \"एक नेटवर्क त्रुटि के कारण मीडिया डाउनलोड आंशिक रूप से विफल हो गया।\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"मीडिया लोड नहीं किया जा सका, या तो सर्वर या नेटवर्क विफल होने के कारण या प्रारूप समर्थित नहीं होने के कारण।\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"मीडिया प्लेबैक निरस्त कर दिया गया, कारण: दूषण की समस्या या मीडिया ने उन सुविधाओं का उपयोग किया था जिनका आपके ब्राउज़र ने समर्थन नहीं किया।\",\n  \"No compatible source was found for this media.\": \"इस मीडिया के लिए कोई अनुकूल स्रोत नहीं मिला।.\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"मीडिया एन्क्रिप्टेड है और हमारे पास इसे डिक्रिप्ट करने की चाबी नहीं है।\",\n  \"Play Video\": \"वीडियो चलाएं\",\n  \"Close\": \"बंद करे\",\n  \"Close Modal Dialog\": \"मोडल डायलॉग बंद करें\",\n  \"Modal Window\": \"मोडल विंडो\",\n  \"This is a modal window\": \"यह एक मोडल विंडो है\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"इस मोडल को एस्केप कुंजी दबाकर या बंद करें बटन को सक्रिय करके बंद किया जा सकता है।\",\n  \", opens captions settings dialog\": \", कैप्शन सेटिंग डायलॉग खोलता है\",\n  \", opens subtitles settings dialog\": \", उपशीर्षक सेटिंग्स संवाद खोलता है\",\n  \", opens descriptions settings dialog\": \", विवरण सेटिंग संवाद खोलता है\",\n  \", selected\": \", चुना गया\",\n  \"captions settings\": \"कैप्शन सेटिंग\",\n  \"subtitles settings\": \"उपशीर्षक सेटिंग\",\n  \"descriptions settings\": \"विवरण सेटिंग\",\n  \"Text\": \"टेक्स्ट\",\n  \"White\": \"सफेद\",\n  \"Black\": \"काला\",\n  \"Red\": \"लाल\",\n  \"Green\": \"हरा\",\n  \"Blue\": \"नीला\",\n  \"Yellow\": \"पीला\",\n  \"Magenta\": \"मैजेंटा\",\n  \"Cyan\": \"सियान\",\n  \"Background\": \"बैकग्राउंड\",\n  \"Window\": \"विंडो\",\n  \"Transparent\": \"पारदर्शी\",\n  \"Semi-Transparent\": \"अर्द्ध पारदर्शी\",\n  \"Opaque\": \"अपारदर्शी\",\n  \"Font Size\": \"फ़ॉन्ट आकार\",\n  \"Text Edge Style\": \"टेक्स्ट एज स्टाइल\",\n  \"None\": \"कोई नहीं\",\n  \"Raised\": \"उठा हुआ\",\n  \"Depressed\": \"उदास\",\n  \"Uniform\": \"वर्दी\",\n  \"Dropshadow\": \"परछाई\",\n  \"Font Family\": \"फॉण्ट परिवार\",\n  \"Proportional Sans-Serif\": \"प्रोपोरशनल साँस-सेरिफ\",\n  \"Monospace Sans-Serif\": \"मोनोस्पास साँस-सेरिफ\",\n  \"Proportional Serif\": \"प्रोपोरशनल सेरिफ\",\n  \"Monospace Serif\": \"मोनोस्पास सेरिफ\",\n  \"Casual\": \"आकस्मिक\",\n  \"Script\": \"स्क्रिप्ट\",\n  \"Small Caps\": \"छोटे अक्षर\",\n  \"Reset\": \"रीसेट करें\",\n  \"restore all settings to the default values\": \"सभी सेटिंग्स को डिफ़ॉल्ट मानों पर पुनर्स्थापित करें\",\n  \"Done\": \"पूर्ण\",\n  \"Caption Settings Dialog\": \"कैप्शन सेटिंग्स डायलॉग\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"डायलॉग विंडो की शुरुआत। एस्केप विंडो को रद्द और बंद कर देगा।\",\n  \"End of dialog window.\": \"संवाद विंडो का अंत।\",\n  \"{1} is loading.\": \"{1} लोड हो रहा है।\",\n  \"Exit Picture-in-Picture\": \"पिक्चर-इन-पिक्चर से बाहर निकलें\",\n  \"Picture-in-Picture\": \"पिक्चर-इन-पिक्चर\"\n});","videojs.addLanguage('hr', {\n  \"Play\": \"Pusti\",\n  \"Pause\": \"Pauza\",\n  \"Current Time\": \"Trenutno vrijeme\",\n  \"Duration\": \"Vrijeme trajanja\",\n  \"Remaining Time\": \"Preostalo vrijeme\",\n  \"Stream Type\": \"Način strimovanja\",\n  \"LIVE\": \"UŽIVO\",\n  \"Loaded\": \"Učitan\",\n  \"Progress\": \"Progres\",\n  \"Fullscreen\": \"Puni ekran\",\n  \"Non-Fullscreen\": \"Mali ekran\",\n  \"Mute\": \"Prigušen\",\n  \"Unmute\": \"Ne-prigušen\",\n  \"Playback Rate\": \"Stopa reprodukcije\",\n  \"Subtitles\": \"Podnaslov\",\n  \"subtitles off\": \"Podnaslov deaktiviran\",\n  \"Captions\": \"Titlovi\",\n  \"captions off\": \"Titlovi deaktivirani\",\n  \"Chapters\": \"Poglavlja\",\n  \"You aborted the media playback\": \"Isključili ste reprodukciju videa.\",\n  \"A network error caused the media download to fail part-way.\": \"Video se prestao preuzimati zbog greške na mreži.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"Video se ne može reproducirati zbog servera, greške u mreži ili je format ne podržan.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"Reprodukcija videa je zaustavljenja zbog greške u formatu ili zbog verzije vašeg pretraživača.\",\n  \"No compatible source was found for this media.\": \"Nije nađen nijedan kompatibilan izvor ovog videa.\"\n});","videojs.addLanguage('hu', {\n  \"Play\": \"Lejátszás\",\n  \"Pause\": \"Szünet\",\n  \"Current Time\": \"Aktuális időpont\",\n  \"Duration\": \"Hossz\",\n  \"Remaining Time\": \"Hátralévő idő\",\n  \"Stream Type\": \"Adatfolyam típusa\",\n  \"LIVE\": \"ÉLŐ\",\n  \"Loaded\": \"Betöltve\",\n  \"Progress\": \"Állapot\",\n  \"Fullscreen\": \"Teljes képernyő\",\n  \"Non-Fullscreen\": \"Normál méret\",\n  \"Mute\": \"Némítás\",\n  \"Unmute\": \"Némítás kikapcsolva\",\n  \"Playback Rate\": \"Lejátszási sebesség\",\n  \"Subtitles\": \"Feliratok\",\n  \"subtitles off\": \"Feliratok kikapcsolva\",\n  \"Captions\": \"Magyarázó szöveg\",\n  \"captions off\": \"Magyarázó szöveg kikapcsolva\",\n  \"Chapters\": \"Fejezetek\",\n  \"You aborted the media playback\": \"Leállította a lejátszást\",\n  \"A network error caused the media download to fail part-way.\": \"Hálózati hiba miatt a videó részlegesen töltődött le.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"A videó nem tölthető be hálózati vagy kiszolgálói hiba miatt, vagy a formátuma nem támogatott.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"A lejátszás adatsérülés miatt leállt, vagy a videó egyes tulajdonságait a böngészője nem támogatja.\",\n  \"No compatible source was found for this media.\": \"Nincs kompatibilis forrás ehhez a videóhoz.\",\n  \"Audio Player\": \"Audio lejátszó\",\n  \"Video Player\": \"Videó lejátszó\",\n  \"Replay\": \"Visszajátszás\",\n  \"Descriptions\": \"Leírások\",\n  \"descriptions off\": \"leírások kikapcsolva\",\n  \"Audio Track\": \"Hangsáv\",\n  \"Volume Level\": \"Hangerő\",\n  \"Play Video\": \"Videó lejátszása\",\n  \"Close\": \"Bezárás\",\n  \"Text\": \"Szöveg\",\n  \"White\": \"Fehér\",\n  \"Black\": \"Fekete\",\n  \"Red\": \"Piros\",\n  \"Green\": \"Zöld\",\n  \"Blue\": \"Kék\",\n  \"Yellow\": \"Sárga\",\n  \"Background\": \"Háttér\",\n  \"Window\": \"Ablak\",\n  \"Transparent\": \"Átlátszó\",\n  \"Semi-Transparent\": \"Félig átlátszó\",\n  \"Opaque\": \"Áttetsző\",\n  \"Font Size\": \"Betűméret\",\n  \"Font Family\": \"Betűtípus\",\n  \"Done\": \"Kész\",\n  \"Picture-in-Picture\": \"Kép a képben\",\n  \"Exit Picture-in-Picture\": \"Kilépés kép a képben módból\",\n  \"{1} is loading.\": \"{1} betöltése.\",\n  \"Reset\": \"Visszaállítás\",\n  \"restore all settings to the default values\": \"összes beállítás visszaállítása az alapértelmezett értékekre\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"A média titkosítva van és nincsenek kulcsok a visszafejtéshez.\",\n  \"Close Modal Dialog\": \"Felugró ablak bezárása\",\n  \"Modal Window\": \"Felugró ablak\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"Ezt a felugró ablakot az Escape gomb megnyomásával vagy a bezáró gomb aktiválásával lehet bezárni.\",\n  \", selected\": \", kiválasztva\",\n  \"descriptions settings\": \"leírások beállítása\",\n  \"Text Edge Style\": \"Szövegél stílus\",\n  \"This is a modal window\": \"Ez egy felugró ablak\",\n  \"Cyan\": \"Cián\",\n  \"Dropshadow\": \"Árnyék\",\n  \"End of dialog window.\": \"Párbeszédablak vége.\",\n  \"Progress Bar\": \"Folyamatjelző sáv\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"Párbeszédablak eleje. Az Escape gomb befejezi és bezárja az ablakot.\",\n  \"Caption Settings Dialog\": \"Feliratbeállítások párbeszédablak\",\n  \", opens descriptions settings dialog\": \", megnyitja a leírások beállításainak párbeszédablakját\",\n  \", opens captions settings dialog\": \", megnyitja a magyarázó szövegek beállításainak párbeszédablakját\",\n  \", opens subtitles settings dialog\": \", megnyitja a feliratok beállításainak párbeszédablakját\",\n  \"Seek to live, currently behind live\": \"Élő adáshoz tekerés, jelenleg az élő adás mögött van\",\n  \"Seek to live, currently playing live\": \"Élő adáshoz tekerés, jelenleg az élő adásnál van\",\n  \"progress bar timing: currentTime={1} duration={2}\": \"{1} / {2}\",\n  \"Magenta\": \"Lila\",\n  \"Script\": \"Script\",\n  \"Casual\": \"Casual\",\n  \"Monospace Serif\": \"Monospace Serif\",\n  \"Monospace Sans-Serif\": \"Monospace Sans-Serif\",\n  \"Proportional Sans-Serif\": \"Proportional Sans-Serif\",\n  \"Proportional Serif\": \"Proportional Serif\",\n  \"Uniform\": \"Uniform\",\n  \"Small Caps\": \"Kiskapitális\",\n  \"None\": \"Egyik sem\",\n  \"captions settings\": \"magyarázó szövegek beállításai\",\n  \"subtitles settings\": \"feliratok beállításai\",\n  \"Raised\": \"Emelt\",\n  \"Depressed\": \"Nyomott\"\n});","videojs.addLanguage('it', {\n  \"Audio Player\": \"Lettore audio\",\n  \"Video Player\": \"Lettore video\",\n  \"Play\": \"Play\",\n  \"Pause\": \"Pausa\",\n  \"Replay\": \"Replay\",\n  \"Current Time\": \"Orario attuale\",\n  \"Duration\": \"Durata\",\n  \"Remaining Time\": \"Tempo rimanente\",\n  \"Stream Type\": \"Tipo del Streaming\",\n  \"LIVE\": \"LIVE\",\n  \"Loaded\": \"Caricato\",\n  \"Progress\": \"Stato\",\n  \"Progress Bar\": \"Barra di avanzamento\",\n  \"progress bar timing: currentTime={1} duration={2}\": \"{1} di {2}\",\n  \"Fullscreen\": \"Schermo intero\",\n  \"Non-Fullscreen\": \"Chiudi Schermo intero\",\n  \"Mute\": \"Muto\",\n  \"Unmute\": \"Audio\",\n  \"Playback Rate\": \"Tasso di riproduzione\",\n  \"Subtitles\": \"Sottotitoli\",\n  \"subtitles off\": \"Senza sottotitoli\",\n  \"Captions\": \"Sottotitoli non udenti\",\n  \"captions off\": \"Senza sottotitoli non udenti\",\n  \"Chapters\": \"Capitolo\",\n  \"Descriptions\": \"Descrizioni\",\n  \"descriptions off\": \"Descrizioni disattivate\",\n  \"Audio Track\": \"Traccia audio\",\n  \"Volume Level\": \"Livello del volume\",\n  \"You aborted the media playback\": \"La riproduzione del filmato è stata interrotta.\",\n  \"A network error caused the media download to fail part-way.\": \"Il download del filmato è stato interrotto a causa di un problema rete.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"Il filmato non può essere caricato a causa di un errore nel server o nella rete o perché il formato non viene supportato.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"La riproduzione del filmato è stata interrotta a causa di un file danneggiato o per l’utilizzo di impostazioni non supportate dal browser.\",\n  \"No compatible source was found for this media.\": \"Non ci sono fonti compatibili per questo filmato.\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"Il contenuto multimediale è criptato e non disponiamo delle chiavi per decifrarlo.\",\n  \"Play Video\": \"Riprodurre il video\",\n  \"Close\": \"Chiudere\",\n  \"Close Modal Dialog\": \"Chiudere la finestra di dialogo\",\n  \"Modal Window\": \"Finestra di dialogo\",\n  \"This is a modal window\": \"Questa è una finestra di dialogo\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"Questa finestra di dialogo può essere chiusa premendo sul tasto Esc o attivando il pulsante di chiusura.\",\n  \", opens captions settings dialog\": \", aprire i parametri della trascrizione dei sottotitoli\",\n  \", opens subtitles settings dialog\": \", aprire i parametri dei sottotitoli\",\n  \", opens descriptions settings dialog\": \", aprire i parametri delle descrizioni\",\n  \", selected\": \", selezionato\",\n  \"captions settings\": \"Parametri della trascrizione dei sottotitoli\",\n  \"subtitles settings\": \"Parametri dei sottotitoli\",\n  \"descriptions settings\": \"Parametri delle descrizioni\",\n  \"Text\": \"Testo\",\n  \"White\": \"Bianco\",\n  \"Black\": \"Nero\",\n  \"Red\": \"Rosso\",\n  \"Green\": \"Verde\",\n  \"Blue\": \"Blu\",\n  \"Yellow\": \"Giallo\",\n  \"Magenta\": \"Magenta\",\n  \"Cyan\": \"Ciano\",\n  \"Background\": \"Sfondo\",\n  \"Window\": \"Finestra\",\n  \"Transparent\": \"Trasparente\",\n  \"Semi-Transparent\": \"Semi-Trasparente\",\n  \"Opaque\": \"Opaco\",\n  \"Font Size\": \"Dimensione dei caratteri\",\n  \"Text Edge Style\": \"Stile dei bordi del testo\",\n  \"None\": \"Nessuno\",\n  \"Uniform\": \"Uniforme\",\n  \"Dropshadow\": \"Ombreggiatura\",\n  \"Font Family\": \"Famiglia di caratteri\",\n  \"Proportional Sans-Serif\": \"Carattere a spaziatura variabile senza grazie (Proportional Sans-Serif)\",\n  \"Monospace Sans-Serif\": \"Carattere a spaziatura fissa senza grazie (Monospace Sans-Serif)\",\n  \"Proportional Serif\": \"Carattere a spaziatura variabile con grazie (Proportional Serif)\",\n  \"Monospace Serif\": \"Carattere a spaziatura fissa con grazie (Monospace Serif)\",\n  \"Small Caps\": \"Maiuscoletto\",\n  \"Reset\": \"Reinizializzare\",\n  \"restore all settings to the default values\": \"Ripristinare i valori predefiniti per tutti i parametri\",\n  \"Done\": \"Operazione completata\",\n  \"Caption Settings Dialog\": \"Finestra di dialogo dei parametri della trascrizione dei sottotitoli\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"Inizio della finestra di dialogo. Il tasto Esc annullerà l’operazione e chiuderà la finestra.\",\n  \"End of dialog window.\": \"Fine della finestra di dialogo.\",\n  \"{1} is loading.\": \"{1} in fase di caricamento.\",\n  \"Exit Picture-in-Picture\": \"Uscire dalla modalità Picture-in-Picture\",\n  \"Picture-in-Picture\": \"Picture-in-Picture\"\n});","videojs.addLanguage('ja', {\n  \"Audio Player\": \"オーディオプレイヤー\",\n  \"Video Player\": \"ビデオプレイヤー\",\n  \"Play\": \"再生\",\n  \"Pause\": \"一時停止\",\n  \"Replay\": \"もう一度見る\",\n  \"Current Time\": \"現在の時間\",\n  \"Duration\": \"長さ\",\n  \"Remaining Time\": \"残りの時間\",\n  \"Stream Type\": \"ストリームの種類\",\n  \"LIVE\": \"ライブ\",\n  \"Loaded\": \"ロード済み\",\n  \"Progress\": \"進行状況\",\n  \"Progress Bar\": \"シークバー\",\n  \"progress bar timing: currentTime={1} duration={2}\": \"{2}の{1}\",\n  \"Fullscreen\": \"フルスクリーン\",\n  \"Non-Fullscreen\": \"フルスクリーン以外\",\n  \"Mute\": \"ミュート\",\n  \"Unmute\": \"ミュート解除\",\n  \"Playback Rate\": \"再生レート\",\n  \"Subtitles\": \"サブタイトル\",\n  \"subtitles off\": \"サブタイトル オフ\",\n  \"Captions\": \"キャプション\",\n  \"captions off\": \"キャプション オフ\",\n  \"Chapters\": \"チャプター\",\n  \"Descriptions\": \"ディスクリプション\",\n  \"descriptions off\": \"ディスクリプションオフ\",\n  \"Audio Track\": \"音声トラック\",\n  \"Volume Level\": \"ボリュームレベル\",\n  \"You aborted the media playback\": \"動画再生を中止しました\",\n  \"A network error caused the media download to fail part-way.\": \"ネットワーク エラーにより動画のダウンロードが途中で失敗しました\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"サーバーまたはネットワークのエラー、またはフォーマットがサポートされていないため、動画をロードできませんでした\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"破損の問題、またはお使いのブラウザがサポートしていない機能が動画に使用されていたため、動画の再生が中止されました\",\n  \"No compatible source was found for this media.\": \"この動画に対して互換性のあるソースが見つかりませんでした\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"メディアは暗号化されており、解読するためのキーがありません。\",\n  \"Play Video\": \"ビデオを再生する\",\n  \"Close\": \"閉じる\",\n  \"Close Modal Dialog\": \"ダイアログボックスを閉じる\",\n  \"Modal Window\": \"ダイアログボックス\",\n  \"This is a modal window\": \"これはダイアログボックスです\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"このダイアログボックスは、Escキーを押すか、閉じるボタンを押して閉じることができま\",\n  \", opens captions settings dialog\": \", 書き起こし字幕の設定を開く\",\n  \", opens subtitles settings dialog\": \", 字幕の設定を開く\",\n  \", opens descriptions settings dialog\": \", ディスクリプションの設定を開く\",\n  \", selected\": \", 選択済み\",\n  \"captions settings\": \"書き起こし字幕の設定\",\n  \"subtitles settings\": \"字幕の設定\",\n  \"descriptions settings\": \"ディスクリプションの設定\",\n  \"Text\": \"テキスト\",\n  \"White\": \"白\",\n  \"Black\": \"黒\",\n  \"Red\": \"赤\",\n  \"Green\": \"緑\",\n  \"Blue\": \"青\",\n  \"Yellow\": \"黄\",\n  \"Magenta\": \"赤紫\",\n  \"Cyan\": \"シアン\",\n  \"Background\": \"背景\",\n  \"Window\": \"ウィンドウ\",\n  \"Transparent\": \"透明\",\n  \"Semi-Transparent\": \"半透明\",\n  \"Opaque\": \"不透明\",\n  \"Font Size\": \"文字サイズ\",\n  \"Text Edge Style\": \"テキストのアウトラインのスタイル\",\n  \"None\": \"なし\",\n  \"Uniform\": \"均一\",\n  \"Dropshadow\": \"影付き\",\n  \"Font Family\": \"フォントの種類\",\n  \"Proportional Sans-Serif\": \"セリフなし可変幅フォント\",\n  \"Monospace Sans-Serif\": \"セリフなし等幅フォント\",\n  \"Proportional Serif\": \"セリフあり可変幅フォント\",\n  \"Monospace Serif\": \"セリフあり等幅フォント\",\n  \"Small Caps\": \"スモールキャピタル\",\n  \"Reset\": \"リセット\",\n  \"restore all settings to the default values\": \"すべての設定をデフォルト値に戻す\",\n  \"Done\": \"終了\",\n  \"Caption Settings Dialog\": \"書き起こし字幕設定ダイアログ\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"ダイアログボックスの開始。Escキーでキャンセルしてウィンドウを閉じます。\",\n  \"End of dialog window.\": \"ダイアログボックスの終了\",\n  \"{1} is loading.\": \"{1}は読み込み中です。\",\n  \"Exit Picture-in-Picture\": \"ピクチャーインピクチャー機能の終了\",\n  \"Picture-in-Picture\": \"ピクチャーインピクチャー\"\n});","videojs.addLanguage('ko', {\n  \"Audio Player\": \"오디오 플레이어\",\n  \"Video Player\": \"비디오 플레이어\",\n  \"Play\": \"재생\",\n  \"Pause\": \"일시중지\",\n  \"Replay\": \"다시 재생\",\n  \"Current Time\": \"현재 시간\",\n  \"Duration\": \"지정 기간\",\n  \"Remaining Time\": \"남은 시간\",\n  \"Stream Type\": \"스트리밍 유형\",\n  \"LIVE\": \"라이브\",\n  \"Loaded\": \"로드됨\",\n  \"Progress\": \"진행\",\n  \"Progress Bar\": \"진행 표시줄\",\n  \"progress bar timing: currentTime={1} duration={2}\": \"{2} 중 {1}\",\n  \"Fullscreen\": \"전체 화면\",\n  \"Non-Fullscreen\": \"전체 화면 해제\",\n  \"Mute\": \"음소거\",\n  \"Unmute\": \"음소거 해제\",\n  \"Playback Rate\": \"재생 비율\",\n  \"Subtitles\": \"서브타이틀\",\n  \"subtitles off\": \"서브타이틀 끄기\",\n  \"Captions\": \"자막\",\n  \"captions off\": \"자막 끄기\",\n  \"Chapters\": \"챕터\",\n  \"Descriptions\": \"제품 설명\",\n  \"descriptions off\": \"제품 설명 끄기\",\n  \"Audio Track\": \"오디오 트랙\",\n  \"Volume Level\": \"볼륨 레벨\",\n  \"You aborted the media playback\": \"비디오 재생을 취소했습니다.\",\n  \"A network error caused the media download to fail part-way.\": \"네트워크 오류로 인하여 비디오 일부를 다운로드하지 못 했습니다.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"비디오를 로드할 수 없습니다. 서버 혹은 네트워크 오류 때문이거나 지원되지 않는 형식 때문일 수 있습니다.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"비디오 재생이 취소됐습니다. 비디오가 손상되었거나 비디오가 사용하는 기능을 브라우저에서 지원하지 않는 것 같습니다.\",\n  \"No compatible source was found for this media.\": \"비디오에 호환되지 않는 소스가 있습니다.\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"미디어는 암호화되어 있으며 이를 해독할 키를 갖고 있지 않습니다.\",\n  \"Play Video\": \"영상 재생\",\n  \"Close\": \"닫기\",\n  \"Close Modal Dialog\": \"대화 상자 닫기\",\n  \"Modal Window\": \"모달 창\",\n  \"This is a modal window\": \"모달 창입니다\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"이 모달은 Esc 키를 누르거나 닫기 버튼을 활성화하여 닫을 수 있습니다.\",\n  \", opens captions settings dialog\": \", 캡션 설정 대화 상자가 열립니다\",\n  \", opens subtitles settings dialog\": \", 자막 설정 대화 상자가 열립니다\",\n  \", opens descriptions settings dialog\": \", 설명 설정 대화 상자가 열립니다\",\n  \", selected\": \", 선택됨\",\n  \"captions settings\": \"캡션 설정\",\n  \"subtitles settings\": \"자막 설정\",\n  \"descriptions settings\": \"설명 설정\",\n  \"Text\": \"텍스트\",\n  \"White\": \"화이트\",\n  \"Black\": \"블랙\",\n  \"Red\": \"레드\",\n  \"Green\": \"그린\",\n  \"Blue\": \"블루\",\n  \"Yellow\": \"옐로우\",\n  \"Magenta\": \"마젠타\",\n  \"Cyan\": \"씨엉\",\n  \"Background\": \"배경\",\n  \"Window\": \"창\",\n  \"Transparent\": \"투명\",\n  \"Semi-Transparent\": \"반투명\",\n  \"Opaque\": \"불투명\",\n  \"Font Size\": \"폰트 크기\",\n  \"Text Edge Style\": \"텍스트 가장자리 스타일\",\n  \"None\": \"없음\",\n  \"Uniform\": \"균일\",\n  \"Font Family\": \"폰트 모음\",\n  \"Proportional Sans-Serif\": \"비례 산세리프체\",\n  \"Monospace Sans-Serif\": \"고정폭 산세리프체\",\n  \"Proportional Serif\": \"비례 세리프체\",\n  \"Monospace Serif\": \"고정폭 세리프체\",\n  \"Small Caps\": \"소문자\",\n  \"Reset\": \"리셋\",\n  \"restore all settings to the default values\": \"모든 설정을 기본값으로 복원\",\n  \"Done\": \"완료\",\n  \"Caption Settings Dialog\": \"캡션 설정 대화 상자\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"대화창 시작. Esc 키를 누르면 취소되고 창이 닫힙니다.\",\n  \"End of dialog window.\": \"대화창 종료\",\n  \"{1} is loading.\": \"{1}이(가) 로딩 중입니다.\",\n  \"Exit Picture-in-Picture\": \"Picture-in-Picture 종료\",\n  \"Picture-in-Picture\": \"Picture-in-Picture\"\n});","videojs.addLanguage('lv', {\n  \"Audio Player\": \"Audio atskaņotājs\",\n  \"Video Player\": \"Video atskaņotājs\",\n  \"Play\": \"Atskaņot\",\n  \"Pause\": \"Pauzēt\",\n  \"Replay\": \"Atkārtot\",\n  \"Current Time\": \"Esošais laiks\",\n  \"Duration\": \"Ilgums\",\n  \"Remaining Time\": \"Atlikušais laiks\",\n  \"Stream Type\": \"Straumes veids\",\n  \"LIVE\": \"LIVE\",\n  \"Seek to live, currently behind live\": \"Pāriet uz tiešraidi\",\n  \"Seek to live, currently playing live\": \"Pāriet uz tiešraidi\",\n  \"Loaded\": \"Ielādēts\",\n  \"Progress\": \"Progress\",\n  \"Progress Bar\": \"Progresa josla\",\n  \"progress bar timing: currentTime={1} duration={2}\": \"{1} no {2}\",\n  \"Fullscreen\": \"Pilnekrāna režīms\",\n  \"Non-Fullscreen\": \"Iziet no pilnekrāna režīma\",\n  \"Mute\": \"Izslēgt skaņu\",\n  \"Unmute\": \"Ieslēgt skaņu\",\n  \"Playback Rate\": \"Atskaņošanas ātrums\",\n  \"Subtitles\": \"Subtitri\",\n  \"subtitles off\": \"Izslēgt subtitrus\",\n  \"Captions\": \"Paraksti\",\n  \"captions off\": \"Izslēgt parakstus\",\n  \"Chapters\": \"Temati\",\n  \"Descriptions\": \"Apraksti\",\n  \"descriptions off\": \"Izslēgt aprakstus\",\n  \"Audio Track\": \"Audio celiņš\",\n  \"Volume Level\": \"Skaļums\",\n  \"You aborted the media playback\": \"Atskaņošana atcelta\",\n  \"A network error caused the media download to fail part-way.\": \"Tīkla kļūdas dēļ, multivides lejupielāde neizdevās.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"Neizdevās ielādēt multividi, iespējams severa, vai tīkla kļūmes dēļ, vai neatbalstīta formāta dēļ.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"Atskaņošana tika pārtraukta tīkla kļūmes dēļ vai pārlūkprogrammas iespēju trūkuma dēļ.\",\n  \"No compatible source was found for this media.\": \"Netika atrasts atbilstošs multivides avots.\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"Multividi nevar atskaņot, jo tas ir kriptēts un nav pieejama dekriptēšanas atslēga.\",\n  \"Play Video\": \"Atskaņot video\",\n  \"Close\": \"Aizvērt\",\n  \"Close Modal Dialog\": \"Aizvērt logu\",\n  \"Modal Window\": \"Logs\",\n  \"This is a modal window\": \"Logs\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"Šo logu var aizvērt, nospiežot uz aizvēršanas pogas vai taustiņa ESC.\",\n  \", opens captions settings dialog\": \", atvērs parakstu logu\",\n  \", opens subtitles settings dialog\": \", atvērs subtitru logu\",\n  \", opens descriptions settings dialog\": \", atvērs aprakstu logu\",\n  \", selected\": \", izvēlēts\",\n  \"captions settings\": \"parakstu iestatījumi\",\n  \"subtitles settings\": \"subtitru iestatījumi\",\n  \"descriptions settings\": \"aprakstu iestatījumi\",\n  \"Text\": \"Teksts\",\n  \"White\": \"Balts\",\n  \"Black\": \"Melns\",\n  \"Red\": \"Sarkans\",\n  \"Green\": \"Zaļš\",\n  \"Blue\": \"Zils\",\n  \"Yellow\": \"Dzeltens\",\n  \"Magenta\": \"Purpursarkana\",\n  \"Cyan\": \"Ciāna\",\n  \"Background\": \"Fons\",\n  \"Window\": \"Logs\",\n  \"Transparent\": \"Caurspīdīgs\",\n  \"Semi-Transparent\": \"Daļēji caurspīdīgs\",\n  \"Opaque\": \"Necaurspīdīgs\",\n  \"Font Size\": \"Šrifta izmērs\",\n  \"Text Edge Style\": \"Teksta ēnas stils\",\n  \"None\": \"Neviens\",\n  \"Raised\": \"Izvirzīts\",\n  \"Depressed\": \"Samazināts\",\n  \"Uniform\": \"Vienmērīgs\",\n  \"Dropshadow\": \"Ēnots\",\n  \"Font Family\": \"Šrifts\",\n  \"Proportional Sans-Serif\": \"Proportional Sans-Serif\",\n  \"Monospace Sans-Serif\": \"Monospace Sans-Serif\",\n  \"Proportional Serif\": \"Proportional Serif\",\n  \"Monospace Serif\": \"Monospace Serif\",\n  \"Casual\": \"Casual\",\n  \"Script\": \"Script\",\n  \"Small Caps\": \"Small Caps\",\n  \"Reset\": \"Atiestatīt\",\n  \"restore all settings to the default values\": \"atiestatīt iestatījumu uz noklusējumu\",\n  \"Done\": \"Gatavs\",\n  \"Caption Settings Dialog\": \"Parakstu iestatījumi\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"Paraksta iestatījumu sākums. Lai aizvērtu, spiediet ESC taustiņu.\",\n  \"End of dialog window.\": \"Parakstu iestatījumu loga beigas\",\n  \"{1} is loading.\": \"{1} ielādē.\",\n  \"Exit Picture-in-Picture\": \"Iziet no Attēls attēlā\",\n  \"Picture-in-Picture\": \"Attēls attēlā\"\n});","videojs.addLanguage('nb', {\n  \"Audio Player\": \"Lydspiller\",\n  \"Video Player\": \"Videospiller\",\n  \"Play\": \"Spill\",\n  \"Pause\": \"Pause\",\n  \"Replay\": \"Spill om igjen\",\n  \"Current Time\": \"Aktuell tid\",\n  \"Duration\": \"Varighet\",\n  \"Remaining Time\": \"Gjenstående tid\",\n  \"Stream Type\": \"Type strøm\",\n  \"LIVE\": \"DIREKTE\",\n  \"Seek to live, currently behind live\": \"Hopp til live, spiller tidligere i sendingen nå\",\n  \"Seek to live, currently playing live\": \"Hopp til live, spiller live nå\",\n  \"Loaded\": \"Lastet inn\",\n  \"Progress\": \"Framdrift\",\n  \"Progress Bar\": \"Framdriftsviser\",\n  \"progress bar timing: currentTime={1} duration={2}\": \"{1} av {2}\",\n  \"Fullscreen\": \"Fullskjerm\",\n  \"Non-Fullscreen\": \"Lukk fullskjerm\",\n  \"Mute\": \"Lyd av\",\n  \"Unmute\": \"Lyd på\",\n  \"Playback Rate\": \"Avspillingshastighet\",\n  \"Subtitles\": \"Teksting på\",\n  \"subtitles off\": \"Teksting av\",\n  \"Captions\": \"Teksting for hørselshemmede på\",\n  \"captions off\": \"Teksting for hørselshemmede av\",\n  \"Chapters\": \"Kapitler\",\n  \"Descriptions\": \"Beskrivelser\",\n  \"descriptions off\": \"beskrivelser av\",\n  \"Audio Track\": \"Lydspor\",\n  \"Volume Level\": \"Volumnivå\",\n  \"You aborted the media playback\": \"Du avbrøt avspillingen.\",\n  \"A network error caused the media download to fail part-way.\": \"En nettverksfeil avbrøt nedlasting av videoen.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"Videoen kunne ikke lastes ned, på grunn av nettverksfeil eller serverfeil, eller fordi formatet ikke er støttet.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"Videoavspillingen ble avbrudt på grunn av ødelagte data eller fordi videoen ville gjøre noe som nettleseren din ikke har støtte for.\",\n  \"No compatible source was found for this media.\": \"Fant ikke en kompatibel kilde for dette mediainnholdet.\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"Mediefilen er kryptert og vi mangler nøkler for å dekryptere den.\",\n  \"Play Video\": \"Spill av video\",\n  \"Close\": \"Lukk\",\n  \"Close Modal Dialog\": \"Lukk dialogvinduet\",\n  \"Modal Window\": \"Dialogvindu\",\n  \"This is a modal window\": \"Dette er et dialogvindu\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"Vinduet kan lukkes ved å trykke på Escape-tasten eller lukkeknappen.\",\n  \", opens captions settings dialog\": \", åpner innstillinger for teksting for hørselshemmede\",\n  \", opens subtitles settings dialog\": \", åpner innstillinger for teksting\",\n  \", opens descriptions settings dialog\": \", åpner innstillinger for beskrivelser\",\n  \", selected\": \", valgt\",\n  \"captions settings\": \"innstillinger for teksting\",\n  \"subtitles settings\": \"innstillinger for teksting\",\n  \"descriptions settings\": \"innstillinger for beskrivelser\",\n  \"Text\": \"Tekst\",\n  \"White\": \"Hvit\",\n  \"Black\": \"Svart\",\n  \"Red\": \"Rød\",\n  \"Green\": \"Grønn\",\n  \"Blue\": \"Blå\",\n  \"Yellow\": \"Gul\",\n  \"Magenta\": \"Magenta\",\n  \"Cyan\": \"Turkis\",\n  \"Background\": \"Bakgrunn\",\n  \"Window\": \"Vindu\",\n  \"Transparent\": \"Gjennomsiktig\",\n  \"Semi-Transparent\": \"Delvis gjennomsiktig\",\n  \"Opaque\": \"Ugjennomsiktig\",\n  \"Font Size\": \"Tekststørrelse\",\n  \"Text Edge Style\": \"Tekstkant\",\n  \"None\": \"Ingen\",\n  \"Raised\": \"Uthevet\",\n  \"Depressed\": \"Nedtrykt\",\n  \"Uniform\": \"Enkel\",\n  \"Dropshadow\": \"Skygge\",\n  \"Font Family\": \"Skrifttype\",\n  \"Proportional Sans-Serif\": \"Proporsjonal skrift uten seriffer\",\n  \"Monospace Sans-Serif\": \"Fastbreddeskrift uten seriffer\",\n  \"Proportional Serif\": \"Proporsjonal skrift med seriffer\",\n  \"Monospace Serif\": \"Fastbreddeskrift med seriffer\",\n  \"Casual\": \"Uformell\",\n  \"Script\": \"Skråskrift\",\n  \"Small Caps\": \"Kapitéler\",\n  \"Reset\": \"Tilbakestill\",\n  \"restore all settings to the default values\": \"tilbakestill alle innstillinger til standardverdiene\",\n  \"Done\": \"Ferdig\",\n  \"Caption Settings Dialog\": \"Innstillingsvindu for teksting for hørselshemmede\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"Begynnelse på dialogvindu. Trykk Escape for å avbryte og lukke vinduet.\",\n  \"End of dialog window.\": \"Avslutning på dialogvindu.\",\n  \"{1} is loading.\": \"{1} laster.\"\n});","videojs.addLanguage('nl', {\n  \"Audio Player\": \"Audiospeler\",\n  \"Video Player\": \"Videospeler\",\n  \"Play\": \"Afspelen\",\n  \"Pause\": \"Pauzeren\",\n  \"Replay\": \"Opnieuw afspelen\",\n  \"Current Time\": \"Huidige tijd\",\n  \"Duration\": \"Tijdsduur\",\n  \"Remaining Time\": \"Resterende tijd\",\n  \"Stream Type\": \"Streamtype\",\n  \"LIVE\": \"LIVE\",\n  \"Loaded\": \"Geladen\",\n  \"Progress\": \"Voortgang\",\n  \"Progress Bar\": \"Voortgangsbalk\",\n  \"progress bar timing: currentTime={1} duration={2}\": \"{1} van {2}\",\n  \"Fullscreen\": \"Volledig scherm\",\n  \"Non-Fullscreen\": \"Geen volledig scherm\",\n  \"Mute\": \"Dempen\",\n  \"Unmute\": \"Niet dempen\",\n  \"Playback Rate\": \"Afspeelsnelheid\",\n  \"Subtitles\": \"Ondertiteling\",\n  \"subtitles off\": \"ondertiteling uit\",\n  \"Captions\": \"Bijschriften\",\n  \"captions off\": \"bijschriften uit\",\n  \"Chapters\": \"Hoofdstukken\",\n  \"Descriptions\": \"Beschrijvingen\",\n  \"descriptions off\": \"beschrijvingen uit\",\n  \"Audio Track\": \"Audiospoor\",\n  \"Volume Level\": \"Geluidsniveau\",\n  \"You aborted the media playback\": \"U heeft het afspelen van de media afgebroken\",\n  \"A network error caused the media download to fail part-way.\": \"Een netwerkfout heeft ervoor gezorgd dat het downloaden van de media halverwege is mislukt.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"De media kon niet worden geladen, dit komt doordat of de server of het netwerk mislukt of doordat het formaat niet wordt ondersteund.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"Het afspelen van de media is afgebroken door een probleem met beschadeigde gegevens of doordat de media functies gebruikt die uw browser niet ondersteund.\",\n  \"No compatible source was found for this media.\": \"Er is geen geschikte bron voor deze media gevonden.\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"De media is versleuteld en we hebben de sleutels niet om deze te ontsleutelen.\",\n  \"Play Video\": \"Video afspelen\",\n  \"Close\": \"Sluiten\",\n  \"Close Modal Dialog\": \"Extra venster sluiten\",\n  \"Modal Window\": \"Extra venster\",\n  \"This is a modal window\": \"Dit is een extra venster\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"Dit venster kan worden gesloten door op de Escape-toets te drukken of door de sluiten-knop te activeren.\",\n  \", opens captions settings dialog\": \", opent instellingen-venster voor bijschriften\",\n  \", opens subtitles settings dialog\": \", opent instellingen-venster voor ondertitelingen\",\n  \", opens descriptions settings dialog\": \", opent instellingen-venster voor beschrijvingen\",\n  \", selected\": \", geselecteerd\",\n  \"captions settings\": \"bijschriften-instellingen\",\n  \"subtitles settings\": \"ondertiteling-instellingen\",\n  \"descriptions settings\": \"beschrijvingen-instellingen\",\n  \"Text\": \"Tekst\",\n  \"White\": \"Wit\",\n  \"Black\": \"Zwart\",\n  \"Red\": \"Rood\",\n  \"Green\": \"Groen\",\n  \"Blue\": \"Blauw\",\n  \"Yellow\": \"Geel\",\n  \"Magenta\": \"Magenta\",\n  \"Cyan\": \"Cyaan\",\n  \"Background\": \"Achtergrond\",\n  \"Window\": \"Venster\",\n  \"Transparent\": \"Transparant\",\n  \"Semi-Transparent\": \"Semi-transparant\",\n  \"Opaque\": \"Ondoorzichtig\",\n  \"Font Size\": \"Lettergrootte\",\n  \"Text Edge Style\": \"Stijl tekstrand\",\n  \"None\": \"Geen\",\n  \"Raised\": \"Verhoogd\",\n  \"Depressed\": \"Ingedrukt\",\n  \"Uniform\": \"Uniform\",\n  \"Dropshadow\": \"Schaduw\",\n  \"Font Family\": \"Lettertype\",\n  \"Proportional Sans-Serif\": \"Proportioneel sans-serif\",\n  \"Monospace Sans-Serif\": \"Monospace sans-serif\",\n  \"Proportional Serif\": \"Proportioneel serif\",\n  \"Monospace Serif\": \"Monospace serif\",\n  \"Casual\": \"Luchtig\",\n  \"Script\": \"Script\",\n  \"Small Caps\": \"Kleine hoofdletters\",\n  \"Reset\": \"Herstellen\",\n  \"restore all settings to the default values\": \"alle instellingen naar de standaardwaarden herstellen\",\n  \"Done\": \"Klaar\",\n  \"Caption Settings Dialog\": \"Venster voor bijschriften-instellingen\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"Begin van dialoogvenster. Escape zal annuleren en het venster sluiten.\",\n  \"End of dialog window.\": \"Einde van dialoogvenster.\"\n});","videojs.addLanguage('nn', {\n  \"Audio Player\": \"Lydspelar\",\n  \"Video Player\": \"Videospelar\",\n  \"Play\": \"Spel\",\n  \"Pause\": \"Pause\",\n  \"Replay\": \"Spel om att\",\n  \"Current Time\": \"Aktuell tid\",\n  \"Duration\": \"Varigheit\",\n  \"Remaining Time\": \"Tid attende\",\n  \"Stream Type\": \"Type straum\",\n  \"LIVE\": \"DIREKTE\",\n  \"Seek to live, currently behind live\": \"Hopp til live, spelar tidlegare i sendinga no\",\n  \"Seek to live, currently playing live\": \"Hopp til live, speler live no\",\n  \"Loaded\": \"Lasta inn\",\n  \"Progress\": \"Framdrift\",\n  \"Progress Bar\": \"Framdriftsvisar\",\n  \"progress bar timing: currentTime={1} duration={2}\": \"{1} av {2}\",\n  \"Fullscreen\": \"Fullskjerm\",\n  \"Non-Fullscreen\": \"Stenga fullskjerm\",\n  \"Mute\": \"Lyd av\",\n  \"Unmute\": \"Lyd på\",\n  \"Playback Rate\": \"Avspelingshastigheit\",\n  \"Subtitles\": \"Teksting på\",\n  \"subtitles off\": \"Teksting av\",\n  \"Captions\": \"Teksting for høyrselshemma på\",\n  \"captions off\": \"Teksting for høyrselshemma av\",\n  \"Chapters\": \"Kapitel\",\n  \"Descriptions\": \"Beskrivingar\",\n  \"descriptions off\": \"beskrivingar av\",\n  \"Audio Track\": \"Lydspor\",\n  \"Volume Level\": \"Volumnivå\",\n  \"You aborted the media playback\": \"Du avbraut avspelinga.\",\n  \"A network error caused the media download to fail part-way.\": \"Ein nettverksfeil avbraut nedlasting av videoen.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"Videoen kunne ikkje lastas ned, på grunn av ein nettverksfeil eller serverfeil, eller av di formatet ikkje er stoda.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"Videoavspelinga blei broten på grunn av øydelagde data eller av di videoen ville gjera noe som nettlesaren din ikkje stodar.\",\n  \"No compatible source was found for this media.\": \"Fant ikke en kompatibel kilde for dette mediainnholdet.\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"Mediefila er kryptert og vi manglar nyklar for å dekryptere ho.\",\n  \"Play Video\": \"Spel av video\",\n  \"Close\": \"Lukk\",\n  \"Close Modal Dialog\": \"Lukk dialogvindauge\",\n  \"Modal Window\": \"Dialogvindauge\",\n  \"This is a modal window\": \"Dette er eit dialogvindauge\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"Vindauget kan lukkast ved å trykke på Escape-tasten eller lukkeknappen.\",\n  \", opens captions settings dialog\": \", opnar innstillingar for teksting for høyrselshemma\",\n  \", opens subtitles settings dialog\": \", opnar innstillingar for teksting\",\n  \", opens descriptions settings dialog\": \", opnar innstillingar for beskrivingar\",\n  \", selected\": \", vald\",\n  \"captions settings\": \"innstillingar for teksting\",\n  \"subtitles settings\": \"innstillingar for teksting\",\n  \"descriptions settings\": \"innstillingar for skildringar\",\n  \"Text\": \"Tekst\",\n  \"White\": \"Kvit\",\n  \"Black\": \"Svart\",\n  \"Red\": \"Raud\",\n  \"Green\": \"Grøn\",\n  \"Blue\": \"Blå\",\n  \"Yellow\": \"Gul\",\n  \"Magenta\": \"Magenta\",\n  \"Cyan\": \"Turkis\",\n  \"Background\": \"Bakgrunn\",\n  \"Window\": \"Vindauge\",\n  \"Transparent\": \"Gjennomsiktig\",\n  \"Semi-Transparent\": \"Delvis gjennomsiktig\",\n  \"Opaque\": \"Ugjennomsiktig\",\n  \"Font Size\": \"Tekststorleik\",\n  \"Text Edge Style\": \"Tekstkant\",\n  \"None\": \"Ingen\",\n  \"Raised\": \"Utheva\",\n  \"Depressed\": \"Nedtrykt\",\n  \"Uniform\": \"Enkel\",\n  \"Dropshadow\": \"Skugge\",\n  \"Font Family\": \"Skrifttype\",\n  \"Proportional Sans-Serif\": \"Proporsjonal skrift utan seriffar\",\n  \"Monospace Sans-Serif\": \"Fastbreddeskrift utan seriffar\",\n  \"Proportional Serif\": \"Proporsjonal skrift med seriffar\",\n  \"Monospace Serif\": \"Fastbreddeskrift med seriffar\",\n  \"Casual\": \"Uformell\",\n  \"Script\": \"Skråskrift\",\n  \"Small Caps\": \"Kapitéler\",\n  \"Reset\": \"Tilbakestell\",\n  \"restore all settings to the default values\": \"tilbakestell alle innstillingar til standardverdiane\",\n  \"Done\": \"Ferdig\",\n  \"Caption Settings Dialog\": \"Innstillingsvindauge for teksting for høyrselshemma\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"Byrjing på dialogvindauge. Trykk Escape for å avbryte og lukke vindauget.\",\n  \"End of dialog window.\": \"Avslutning på dialogvindauge.\",\n  \"{1} is loading.\": \"{1} lastar.\"\n});","videojs.addLanguage('oc', {\n  \"Audio Player\": \"Lector àudio\",\n  \"Video Player\": \"Lector vidèo\",\n  \"Play\": \"Lectura\",\n  \"Pause\": \"Pausa\",\n  \"Replay\": \"Tornar legir\",\n  \"Current Time\": \"Durada passada\",\n  \"Duration\": \"Durada\",\n  \"Remaining Time\": \"Temps restant\",\n  \"Stream Type\": \"Tipe de difusion\",\n  \"LIVE\": \"DIRÈCTE\",\n  \"Seek to live, currently behind live\": \"Trapar lo dirècte, actualament darrièr lo dirècte\",\n  \"Seek to live, currently playing live\": \"Trapar lo dirècte, actualament lo dirècte es en lectura\",\n  \"Loaded\": \"Cargat\",\n  \"Progress\": \"Progression\",\n  \"Progress Bar\": \"Barra de progression\",\n  \"progress bar timing: currentTime={1} duration={2}\": \"{1} sus {2}\",\n  \"Fullscreen\": \"Ecran complèt\",\n  \"Non-Fullscreen\": \"Pas en ecran complèt\",\n  \"Mute\": \"Copar lo son\",\n  \"Unmute\": \"Restablir lo son\",\n  \"Playback Rate\": \"Velocitat de lectura\",\n  \"Subtitles\": \"Sostítols\",\n  \"subtitles off\": \"Sostítols desactivats\",\n  \"Captions\": \"Legendas\",\n  \"captions off\": \"Legendas desactivadas\",\n  \"Chapters\": \"Capítols\",\n  \"Descriptions\": \"Descripcions\",\n  \"descriptions off\": \"descripcions desactivadas\",\n  \"Audio Track\": \"Pista àudio\",\n  \"Volume Level\": \"Nivèl del volum\",\n  \"You aborted the media playback\": \"Avètz copat la lectura del mèdia.\",\n  \"A network error caused the media download to fail part-way.\": \"Una error de ret a provocat un fracàs del telecargament.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"Lo mèdia a pas pogut èsser cargat, siá perque lo servidor o lo ret a fracassat siá perque lo format es pas compatible.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"La lectura del mèdia es copada a causa d’un problèma de corrupcion o perque lo mèdia utiliza de foncionalitats pas suportadas pel navigador.\",\n  \"No compatible source was found for this media.\": \"Cap de font compatiblas pas trobada per aqueste mèdia.\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"Lo mèdia es chifrat e avèm pas las claus per lo deschifrar.\",\n  \"Play Video\": \"Legir la vidèo\",\n  \"Close\": \"Tampar\",\n  \"Close Modal Dialog\": \"Tampar la fenèstra\",\n  \"Modal Window\": \"Fenèstra\",\n  \"This is a modal window\": \"Aquò es una fenèstra\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"Aquesta fenèstra pòt èsser tampada en quichar Escapar sul clavièr o en activar lo boton de tampadura.\",\n  \", opens captions settings dialog\": \", dobrís la fenèstra de paramètres de legendas\",\n  \", opens subtitles settings dialog\": \", dobrís la fenèstra de paramètres de sostítols\",\n  \", opens descriptions settings dialog\": \", dobrís la fenèstra de paramètres de descripcions\",\n  \", selected\": \", seleccionat\",\n  \"captions settings\": \"paramètres de legendas\",\n  \"subtitles settings\": \"paramètres de sostítols\",\n  \"descriptions settings\": \"paramètres de descripcions\",\n  \"Text\": \"Tèxte\",\n  \"White\": \"Blanc\",\n  \"Black\": \"Negre\",\n  \"Red\": \"Roge\",\n  \"Green\": \"Verd\",\n  \"Blue\": \"Blau\",\n  \"Yellow\": \"Jaune\",\n  \"Magenta\": \"Magenta\",\n  \"Cyan\": \"Cian\",\n  \"Background\": \"Rèireplan\",\n  \"Window\": \"Fenèstra\",\n  \"Transparent\": \"Transparent\",\n  \"Semi-Transparent\": \"Semitransparent\",\n  \"Opaque\": \"Opac\",\n  \"Font Size\": \"Talha de la polissa\",\n  \"Text Edge Style\": \"Estil dels contorns del tèxte\",\n  \"None\": \"Cap\",\n  \"Raised\": \"Naut\",\n  \"Depressed\": \"Enfonsat\",\n  \"Uniform\": \"Unifòrme\",\n  \"Dropshadow\": \"Ombrat\",\n  \"Font Family\": \"Familha de polissa\",\n  \"Proportional Sans-Serif\": \"Sans-Serif proporcionala\",\n  \"Monospace Sans-Serif\": \"Monospace Sans-Serif\",\n  \"Proportional Serif\": \"Serif proporcionala\",\n  \"Monospace Serif\": \"Serif proporcionala\",\n  \"Casual\": \"Manuscrita\",\n  \"Script\": \"Script\",\n  \"Small Caps\": \"Pichonas majusculas\",\n  \"Reset\": \"Reïnicializar\",\n  \"restore all settings to the default values\": \"O restablir tot a las valors per defaut\",\n  \"Done\": \"Acabat\",\n  \"Caption Settings Dialog\": \"Fenèstra de paramètres de legenda\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"Debuta de la fenèstra. Escapar anullarà e tamparà la fenèstra\",\n  \"End of dialog window.\": \"Fin de la fenèstra.\",\n  \"{1} is loading.\": \"{1} es a cargar.\"\n});","videojs.addLanguage('pl', {\n  \"Audio Player\": \"Odtwarzacz audio\",\n  \"Video Player\": \"Odtwarzacz wideo\",\n  \"Play\": \"Odtwarzaj\",\n  \"Pause\": \"Pauza\",\n  \"Replay\": \"Odtwórz ponownie\",\n  \"Current Time\": \"Aktualny czas\",\n  \"Duration\": \"Czas trwania\",\n  \"Remaining Time\": \"Pozostały czas\",\n  \"Stream Type\": \"Typ strumienia\",\n  \"LIVE\": \"NA ŻYWO\",\n  \"Loaded\": \"Załadowany\",\n  \"Progress\": \"Status\",\n  \"Progress Bar\": \"Pasek stanu\",\n  \"Fullscreen\": \"Pełny ekran\",\n  \"Non-Fullscreen\": \"Pełny ekran niedostępny\",\n  \"Mute\": \"Wyłącz dźwięk\",\n  \"Unmute\": \"Włącz dźwięk\",\n  \"Playback Rate\": \"Szybkość odtwarzania\",\n  \"Subtitles\": \"Napisy\",\n  \"subtitles off\": \"Napisy wyłączone\",\n  \"Captions\": \"Transkrypcja\",\n  \"captions off\": \"Transkrypcja wyłączona\",\n  \"Chapters\": \"Rozdziały\",\n  \"Descriptions\": \"Opisy\",\n  \"descriptions off\": \"Opisy wyłączone\",\n  \"Audio Track\": \"Ścieżka audio\",\n  \"Volume Level\": \"Poziom głośności\",\n  \"You aborted the media playback\": \"Odtwarzanie zostało przerwane\",\n  \"A network error caused the media download to fail part-way.\": \"Problemy z siecią spowodowały błąd przy pobieraniu materiału wideo.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"Materiał wideo nie może być załadowany, ponieważ wystąpił problem z siecią lub format nie jest obsługiwany\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"Odtwarzanie materiału wideo zostało przerwane z powodu uszkodzonego pliku wideo lub z powodu błędu funkcji, które nie są wspierane przez przeglądarkę.\",\n  \"No compatible source was found for this media.\": \"Dla tego materiału wideo nie znaleziono kompatybilnego źródła.\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"Źródło jest zaszyfrowane i nie mamy kluczy do jego odszyfrowania.\",\n  \"Play Video\": \"Odtwarzaj wideo\",\n  \"Close\": \"Zamknij\",\n  \"Close Modal Dialog\": \"Zamknij okno modala\",\n  \"Modal Window\": \"Okno modala\",\n  \"This is a modal window\": \"To jest okno modala\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"Ten modal możesz zamknąć naciskając przycisk Escape albo wybierając przycisk Zamknij.\",\n  \", opens captions settings dialog\": \", otwiera okno dialogowe ustawień transkrypcji\",\n  \", opens subtitles settings dialog\": \", otwiera okno dialogowe napisów\",\n  \", opens descriptions settings dialog\": \", otwiera okno dialogowe opisów\",\n  \", selected\": \", zaznaczone\",\n  \"captions settings\": \"ustawienia transkrypcji\",\n  \"subtitles settings\": \"ustawienia napisów\",\n  \"descriptions settings\": \"ustawienia opisów\",\n  \"Text\": \"Tekst\",\n  \"White\": \"Biały\",\n  \"Black\": \"Czarny\",\n  \"Red\": \"Czerwony\",\n  \"Green\": \"Zielony\",\n  \"Blue\": \"Niebieski\",\n  \"Yellow\": \"Żółty\",\n  \"Magenta\": \"Magenta\",\n  \"Cyan\": \"Cyjan\",\n  \"Background\": \"Tło\",\n  \"Window\": \"Okno\",\n  \"Transparent\": \"Przezroczysty\",\n  \"Semi-Transparent\": \"Półprzezroczysty\",\n  \"Opaque\": \"Nieprzezroczysty\",\n  \"Font Size\": \"Rozmiar czcionki\",\n  \"Text Edge Style\": \"Styl krawędzi tekstu\",\n  \"None\": \"Brak\",\n  \"Raised\": \"Podniesiony\",\n  \"Depressed\": \"Obniżony\",\n  \"Uniform\": \"Równomierny\",\n  \"Dropshadow\": \"Cień\",\n  \"Font Family\": \"Czcionka\",\n  \"Reset\": \"Ustawienia domyślne\",\n  \"restore all settings to the default values\": \"zresetuj wszystkie ustawienia do domyślnych wartości\",\n  \"Done\": \"Gotowe\",\n  \"Caption Settings Dialog\": \"Okno dialogowe ustawień transkrypcji\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"Początek okna dialogowego. Escape anuluje i zamknie okno.\",\n  \"End of dialog window.\": \"Koniec okna dialogowego.\",\n  \"Exit Picture-in-Picture\": \"Wyjdź z trybu obraz w obrazie\",\n  \"Picture-in-Picture\": \"Obraz w obrazie\"\n});","videojs.addLanguage('pt-BR', {\n  \"Audio Player\": \"Reprodutor de áudio\",\n  \"Video Player\": \"Reprodutor de vídeo\",\n  \"Play\": \"Tocar\",\n  \"Pause\": \"Pausar\",\n  \"Replay\": \"Tocar novamente\",\n  \"Current Time\": \"Tempo\",\n  \"Duration\": \"Duração\",\n  \"Remaining Time\": \"Tempo Restante\",\n  \"Stream Type\": \"Tipo de Stream\",\n  \"LIVE\": \"AO VIVO\",\n  \"Loaded\": \"Carregado\",\n  \"Progress\": \"Progresso\",\n  \"Progress Bar\": \"Barra de progresso\",\n  \"progress bar timing: currentTime={1} duration={2}\": \"{1} de {2}\",\n  \"Fullscreen\": \"Tela Cheia\",\n  \"Non-Fullscreen\": \"Tela Normal\",\n  \"Mute\": \"Mudo\",\n  \"Unmute\": \"Habilitar Som\",\n  \"Playback Rate\": \"Velocidade\",\n  \"Subtitles\": \"Legendas\",\n  \"subtitles off\": \"Sem Legendas\",\n  \"Captions\": \"Anotações\",\n  \"captions off\": \"Sem Anotações\",\n  \"Chapters\": \"Capítulos\",\n  \"Descriptions\": \"Descrições\",\n  \"descriptions off\": \"sem descrições\",\n  \"Audio Track\": \"Faixa de áudio\",\n  \"Volume Level\": \"Nível de volume\",\n  \"You aborted the media playback\": \"Você parou a execução do vídeo.\",\n  \"A network error caused the media download to fail part-way.\": \"Um erro na rede causou falha durante o download da mídia.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"A mídia não pode ser carregada, por uma falha de rede ou servidor ou o formato não é suportado.\",\n  \"No compatible source was found for this media.\": \"Nenhuma fonte foi encontrada para esta mídia.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"A reprodução foi interrompida devido à um problema de mídia corrompida ou porque a mídia utiliza funções que seu navegador não suporta.\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"A mídia está criptografada e não temos as chaves para descriptografar.\",\n  \"Play Video\": \"Tocar Vídeo\",\n  \"Close\": \"Fechar\",\n  \"Close Modal Dialog\": \"Fechar Diálogo Modal\",\n  \"Modal Window\": \"Janela Modal\",\n  \"This is a modal window\": \"Isso é uma janela-modal\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"Esta janela pode ser fechada pressionando a tecla de Escape.\",\n  \", opens captions settings dialog\": \", abre as configurações de legendas de comentários\",\n  \", opens subtitles settings dialog\": \", abre as configurações de legendas\",\n  \", opens descriptions settings dialog\": \", abre as configurações\",\n  \", selected\": \", selecionada\",\n  \"captions settings\": \"configurações de legendas de comentários\",\n  \"subtitles settings\": \"configurações de legendas\",\n  \"descriptions settings\": \"configurações das descrições\",\n  \"Text\": \"Texto\",\n  \"White\": \"Branco\",\n  \"Black\": \"Preto\",\n  \"Red\": \"Vermelho\",\n  \"Green\": \"Verde\",\n  \"Blue\": \"Azul\",\n  \"Yellow\": \"Amarelo\",\n  \"Magenta\": \"Magenta\",\n  \"Cyan\": \"Ciano\",\n  \"Background\": \"Plano-de-Fundo\",\n  \"Window\": \"Janela\",\n  \"Transparent\": \"Transparente\",\n  \"Semi-Transparent\": \"Semi-Transparente\",\n  \"Opaque\": \"Opaco\",\n  \"Font Size\": \"Tamanho da Fonte\",\n  \"Text Edge Style\": \"Estilo da Borda\",\n  \"None\": \"Nenhum\",\n  \"Raised\": \"Elevado\",\n  \"Depressed\": \"Acachapado\",\n  \"Uniform\": \"Uniforme\",\n  \"Dropshadow\": \"Sombra de projeção\",\n  \"Font Family\": \"Família da Fonte\",\n  \"Proportional Sans-Serif\": \"Sans-Serif(Sem serifa) Proporcional\",\n  \"Monospace Sans-Serif\": \"Sans-Serif(Sem serifa) Monoespaçada\",\n  \"Proportional Serif\": \"Serifa Proporcional\",\n  \"Monospace Serif\": \"Serifa Monoespaçada\",\n  \"Casual\": \"Casual\",\n  \"Script\": \"Script\",\n  \"Small Caps\": \"Maiúsculas Pequenas\",\n  \"Reset\": \"Redefinir\",\n  \"restore all settings to the default values\": \"restaurar todas as configurações aos valores padrão\",\n  \"Done\": \"Salvar\",\n  \"Caption Settings Dialog\": \"Caíxa-de-Diálogo das configurações de Legendas\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"Iniciando a Janela-de-Diálogo. Pressionar Escape irá cancelar e fechar a janela.\",\n  \"End of dialog window.\": \"Fim da Janela-de-Diálogo\",\n  \"{1} is loading.\": \"{1} está carregando.\",\n  \"Exit Picture-in-Picture\": \"Sair de Picture-in-Picture\",\n  \"Picture-in-Picture\": \"Picture-in-Picture\"\n});","videojs.addLanguage('pt-PT', {\n  \"Play\": \"Reproduzir\",\n  \"Pause\": \"Parar\",\n  \"Replay\": \"Reiniciar\",\n  \"Current Time\": \"Tempo Atual\",\n  \"Duration\": \"Duração\",\n  \"Remaining Time\": \"Tempo Restante\",\n  \"Stream Type\": \"Tipo de Stream\",\n  \"LIVE\": \"EM DIRETO\",\n  \"Loaded\": \"Carregado\",\n  \"Progress\": \"Progresso\",\n  \"Fullscreen\": \"Ecrã inteiro\",\n  \"Non-Fullscreen\": \"Ecrã normal\",\n  \"Mute\": \"Desativar som\",\n  \"Unmute\": \"Ativar som\",\n  \"Playback Rate\": \"Velocidade de reprodução\",\n  \"Subtitles\": \"Legendas\",\n  \"subtitles off\": \"desativar legendas\",\n  \"Captions\": \"Anotações\",\n  \"captions off\": \"desativar anotações\",\n  \"Chapters\": \"Capítulos\",\n  \"Close Modal Dialog\": \"Fechar Janela Modal\",\n  \"Descriptions\": \"Descrições\",\n  \"descriptions off\": \"desativar descrições\",\n  \"Audio Track\": \"Faixa Áudio\",\n  \"You aborted the media playback\": \"Parou a reprodução do vídeo.\",\n  \"A network error caused the media download to fail part-way.\": \"Um erro na rede fez o vídeo falhar parcialmente.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"O vídeo não pode ser carregado, ou porque houve um problema na rede ou no servidor, ou porque formato do vídeo não é compatível.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"A reprodução foi interrompida por um problema com o vídeo ou porque o formato não é compatível com o seu navegador.\",\n  \"No compatible source was found for this media.\": \"Não foi encontrada uma fonte de vídeo compatível.\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"O vídeo está encriptado e não há uma chave para o desencriptar.\",\n  \"Play Video\": \"Reproduzir Vídeo\",\n  \"Close\": \"Fechar\",\n  \"Modal Window\": \"Janela Modal\",\n  \"This is a modal window\": \"Isto é uma janela modal\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"Esta modal pode ser fechada pressionando a tecla ESC ou ativando o botão de fechar.\",\n  \", opens captions settings dialog\": \", abre janela com definições de legendas\",\n  \", opens subtitles settings dialog\": \", abre janela com definições de legendas\",\n  \", opens descriptions settings dialog\": \", abre janela com definições de descrições\",\n  \", selected\": \", seleccionado\"\n});","videojs.addLanguage('ro', {\n  \"Audio Player\": \"Player audio\",\n  \"Video Player\": \"Player video\",\n  \"Play\": \"Piesă\",\n  \"Pause\": \"Pauză\",\n  \"Replay\": \"Reluare\",\n  \"Current Time\": \"Ora curentă\",\n  \"Duration\": \"Durată\",\n  \"Remaining Time\": \"Timp rămas\",\n  \"Stream Type\": \"Tip flux\",\n  \"LIVE\": \"ÎN DIRECT\",\n  \"Seek to live, currently behind live\": \"Căutare în direct; în prezent, sunteți în urmă\",\n  \"Seek to live, currently playing live\": \"Căutare în direct; în prezent, se redă în direct\",\n  \"Loaded\": \"Încărcat\",\n  \"Progress\": \"Progres\",\n  \"Progress Bar\": \"Bară de progres\",\n  \"progress bar timing: currentTime={1} duration={2}\": \"{1} din {2}\",\n  \"Fullscreen\": \"Ecran complet\",\n  \"Non-Fullscreen\": \"Ecran parțial\",\n  \"Mute\": \"Suprimare sunet\",\n  \"Unmute\": \"Activare sunet\",\n  \"Playback Rate\": \"Rată de redare\",\n  \"Subtitles\": \"Subtitrări\",\n  \"subtitles off\": \"subtitrări dezactivate\",\n  \"Captions\": \"Indicații scrise\",\n  \"captions off\": \"indicații scrise dezactivate\",\n  \"Chapters\": \"Capitole\",\n  \"Descriptions\": \"Descrieri\",\n  \"descriptions off\": \"descrieri dezactivate\",\n  \"Audio Track\": \"Pistă audio\",\n  \"Volume Level\": \"Nivel volum\",\n  \"You aborted the media playback\": \"Ați abandonat redarea media\",\n  \"A network error caused the media download to fail part-way.\": \"O eroare de rețea a provocat eșecul descărcării conținutului media în timpul procesului.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"Conținutul media nu a putut fi încărcat, fie pentru că serverul sau rețeaua a eșuat, fie pentru că formatul nu este acceptat.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"Redarea media a fost întreruptă din cauza conținutului corupt sau din cauza faptului că acest conținut media folosește funcții pe care browserul dvs. nu le acceptă.\",\n  \"No compatible source was found for this media.\": \"Nu au fost găsite surse compatibile pentru acest conținut media.\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"Conținutul media este criptată și nu avem cheile pentru decriptare.\",\n  \"Play Video\": \"Redare video\",\n  \"Close\": \"Închidere\",\n  \"Close Modal Dialog\": \"Închidere dialog modal\",\n  \"Modal Window\": \"Fereastră modală\",\n  \"This is a modal window\": \"Aceasta este o fereastră modală\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"Această fereastră modală poate fi închisă cu tasta Escape sau butonul de închidere.\",\n  \", opens captions settings dialog\": \", deschide dialogul de setări pentru indicații scrise\",\n  \", opens subtitles settings dialog\": \", deschide dialogul de setări pentru subtitrări\",\n  \", opens descriptions settings dialog\": \", deschide dialogul de setări pentru descrieri\",\n  \", selected\": \", selectat\",\n  \"captions settings\": \"setări indicații scrise\",\n  \"subtitles settings\": \"setări subtitrări\",\n  \"descriptions settings\": \"setări descrieri\",\n  \"Text\": \"Text\",\n  \"White\": \"Alb\",\n  \"Black\": \"Negru\",\n  \"Red\": \"Roșu\",\n  \"Green\": \"Verde\",\n  \"Blue\": \"Albastru\",\n  \"Yellow\": \"Galben\",\n  \"Magenta\": \"Magenta\",\n  \"Cyan\": \"Cyan\",\n  \"Background\": \"Fundal\",\n  \"Window\": \"Fereastră\",\n  \"Transparent\": \"Transparent\",\n  \"Semi-Transparent\": \"Semitransparent\",\n  \"Opaque\": \"Opac\",\n  \"Font Size\": \"Mărime font\",\n  \"Text Edge Style\": \"Stil margine text\",\n  \"None\": \"Fără\",\n  \"Raised\": \"Ridicat\",\n  \"Depressed\": \"Apăsat\",\n  \"Uniform\": \"Uniformă\",\n  \"Dropshadow\": \"Umbră\",\n  \"Font Family\": \"Familie fonturi\",\n  \"Proportional Sans-Serif\": \"Sans-serif proporțional\",\n  \"Monospace Sans-Serif\": \"Sans-serif monospațiu\",\n  \"Proportional Serif\": \"Serif proporțional\",\n  \"Monospace Serif\": \"Serif monospațiu\",\n  \"Casual\": \"Informal\",\n  \"Script\": \"Script\",\n  \"Small Caps\": \"Majuscule mici\",\n  \"Reset\": \"Resetare\",\n  \"restore all settings to the default values\": \"readuceți toate setările la valorile implicite\",\n  \"Done\": \"Terminat\",\n  \"Caption Settings Dialog\": \"Dialog setări indicații scrise\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"Începutul ferestrei de dialog. Tasta Escape va anula și va închide fereastra.\",\n  \"End of dialog window.\": \"Sfârșitul ferestrei de dialog.\",\n  \"{1} is loading.\": \"{1} se încarcă.\",\n  \"Exit Picture-in-Picture\": \"Închidere imagine în imagine\",\n  \"Picture-in-Picture\": \"Imagine în imagine\"\n});","videojs.addLanguage('ru', {\n  \"Audio Player\": \"Аудио проигрыватель\",\n  \"Video Player\": \"Видео проигрыватель\",\n  \"Play\": \"Воспроизвести\",\n  \"Pause\": \"Приостановить\",\n  \"Replay\": \"Воспроизвести снова\",\n  \"Current Time\": \"Текущее время\",\n  \"Duration\": \"Продолжительность\",\n  \"Remaining Time\": \"Оставшееся время\",\n  \"Stream Type\": \"Тип потока\",\n  \"LIVE\": \"ОНЛАЙН\",\n  \"Loaded\": \"Загрузка\",\n  \"Progress\": \"Прогресс\",\n  \"Progress Bar\": \"Индикатор загрузки\",\n  \"progress bar timing: currentTime={1} duration={2}\": \"{1} из {2}\",\n  \"Fullscreen\": \"Полноэкранный режим\",\n  \"Non-Fullscreen\": \"Неполноэкранный режим\",\n  \"Mute\": \"Без звука\",\n  \"Unmute\": \"Со звуком\",\n  \"Playback Rate\": \"Скорость воспроизведения\",\n  \"Subtitles\": \"Субтитры\",\n  \"subtitles off\": \"Субтитры выкл.\",\n  \"Captions\": \"Подписи\",\n  \"captions off\": \"Подписи выкл.\",\n  \"Chapters\": \"Главы\",\n  \"Descriptions\": \"Описания\",\n  \"descriptions off\": \"Отключить описания\",\n  \"Audio Track\": \"Звуковая дорожка\",\n  \"Volume Level\": \"Уровень громкости\",\n  \"You aborted the media playback\": \"Вы прервали воспроизведение видео\",\n  \"A network error caused the media download to fail part-way.\": \"Ошибка сети вызвала сбой во время загрузки видео.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"Невозможно загрузить видео из-за сетевого или серверного сбоя либо формат не поддерживается.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"Воспроизведение видео было приостановлено из-за повреждения либо в связи с тем, что видео использует функции, неподдерживаемые вашим браузером.\",\n  \"No compatible source was found for this media.\": \"Совместимые источники для этого видео отсутствуют.\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"Видео в зашифрованном виде, и у нас нет ключей для расшифровки.\",\n  \"Play Video\": \"Воспроизвести видео\",\n  \"Close\": \"Закрыть\",\n  \"Close Modal Dialog\": \"Закрыть модальное окно\",\n  \"Modal Window\": \"Модальное окно\",\n  \"This is a modal window\": \"Это модальное окно\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"Модальное окно можно закрыть нажав Esc или кнопку закрытия окна.\",\n  \", opens captions settings dialog\": \", откроется диалог настройки подписей\",\n  \", opens subtitles settings dialog\": \", откроется диалог настройки субтитров\",\n  \", opens descriptions settings dialog\": \", откроется диалог настройки описаний\",\n  \", selected\": \", выбрано\",\n  \"captions settings\": \"настройки подписей\",\n  \"subtitles settings\": \"настройки субтитров\",\n  \"descriptions settings\": \"настройки описаний\",\n  \"Text\": \"Текст\",\n  \"White\": \"Белый\",\n  \"Black\": \"Черный\",\n  \"Red\": \"Красный\",\n  \"Green\": \"Зеленый\",\n  \"Blue\": \"Синий\",\n  \"Yellow\": \"Желтый\",\n  \"Magenta\": \"Пурпурный\",\n  \"Cyan\": \"Голубой\",\n  \"Background\": \"Фон\",\n  \"Window\": \"Окно\",\n  \"Transparent\": \"Прозрачный\",\n  \"Semi-Transparent\": \"Полупрозрачный\",\n  \"Opaque\": \"Прозрачность\",\n  \"Font Size\": \"Размер шрифта\",\n  \"Text Edge Style\": \"Стиль края текста\",\n  \"None\": \"Ничего\",\n  \"Raised\": \"Поднятый\",\n  \"Depressed\": \"Пониженный\",\n  \"Uniform\": \"Одинаковый\",\n  \"Dropshadow\": \"Тень\",\n  \"Font Family\": \"Шрифт\",\n  \"Proportional Sans-Serif\": \"Пропорциональный без засечек\",\n  \"Monospace Sans-Serif\": \"Моноширинный без засечек\",\n  \"Proportional Serif\": \"Пропорциональный с засечками\",\n  \"Monospace Serif\": \"Моноширинный с засечками\",\n  \"Casual\": \"Случайный\",\n  \"Script\": \"Письменный\",\n  \"Small Caps\": \"Малые прописные\",\n  \"Reset\": \"Сбросить\",\n  \"restore all settings to the default values\": \"сбросить все найстройки по умолчанию\",\n  \"Done\": \"Готово\",\n  \"Caption Settings Dialog\": \"Диалог настроек подписи\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"Начало диалоговго окна. Кнопка Escape закроет или отменит окно\",\n  \"End of dialog window.\": \"Конец диалогового окна.\",\n  \"{1} is loading.\": \"{1} загружается.\"\n});","videojs.addLanguage('sk', {\n  \"Audio Player\": \"Zvukový prehrávač\",\n  \"Video Player\": \"Video prehrávač\",\n  \"Play\": \"Prehrať\",\n  \"Pause\": \"Pozastaviť\",\n  \"Replay\": \"Prehrať znova\",\n  \"Current Time\": \"Aktuálny čas\",\n  \"Duration\": \"Čas trvania\",\n  \"Remaining Time\": \"Zostávajúci čas\",\n  \"Stream Type\": \"Typ stopy\",\n  \"LIVE\": \"NAŽIVO\",\n  \"Loaded\": \"Načítané\",\n  \"Progress\": \"Priebeh\",\n  \"Progress Bar\": \"Ukazovateľ priebehu\",\n  \"progress bar timing: currentTime={1} duration={2}\": \"časovanie ukazovateľa priebehu: currentTime={1} duration={2}\",\n  \"Fullscreen\": \"Režim celej obrazovky\",\n  \"Non-Fullscreen\": \"Režim normálnej obrazovky\",\n  \"Mute\": \"Stlmiť\",\n  \"Unmute\": \"Zrušiť stlmenie\",\n  \"Playback Rate\": \"Rýchlosť prehrávania\",\n  \"Subtitles\": \"Titulky\",\n  \"subtitles off\": \"titulky vypnuté\",\n  \"Captions\": \"Popisky\",\n  \"captions off\": \"popisky vypnuté\",\n  \"Chapters\": \"Kapitoly\",\n  \"Descriptions\": \"Opisy\",\n  \"descriptions off\": \"opisy vypnuté\",\n  \"Audio Track\": \"Zvuková stopa\",\n  \"Volume Level\": \"Úroveň hlasitosti\",\n  \"You aborted the media playback\": \"Prerušili ste prehrávanie\",\n  \"A network error caused the media download to fail part-way.\": \"Sťahovanie súboru bolo zrušené pre chybu na sieti.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"Súbor sa nepodarilo načítať pre chybu servera, sieťového pripojenia, alebo je formát súboru nepodporovaný.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"Prehrávanie súboru bolo prerušené pre poškodené dáta, alebo súbor používa vlastnosti, ktoré váš prehliadač nepodporuje.\",\n  \"No compatible source was found for this media.\": \"Nebol nájdený žiaden kompatibilný zdroj pre tento súbor.\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"Súbor je zašifrovaný a nie je k dispozícii kľúč na rozšifrovanie.\",\n  \"Play Video\": \"Prehrať video\",\n  \"Close\": \"Zatvoriť\",\n  \"Close Modal Dialog\": \"Zatvoriť modálne okno\",\n  \"Modal Window\": \"Modálne okno\",\n  \"This is a modal window\": \"Toto je modálne okno\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"Toto modálne okno je možné zatvoriť stlačením klávesy Escape, alebo aktivovaním tlačidla na zatvorenie.\",\n  \", opens captions settings dialog\": \", otvorí okno nastavení popiskov\",\n  \", opens subtitles settings dialog\": \", otvorí okno nastavení titulkov\",\n  \", opens descriptions settings dialog\": \", otvorí okno nastavení opisov\",\n  \", selected\": \", označené\",\n  \"captions settings\": \"nastavenia popiskov\",\n  \"subtitles settings\": \"nastavenia titulkov\",\n  \"descriptions settings\": \"nastavenia opisov\",\n  \"Text\": \"Text\",\n  \"White\": \"Biela\",\n  \"Black\": \"Čierna\",\n  \"Red\": \"Červená\",\n  \"Green\": \"Zelená\",\n  \"Blue\": \"Modrá\",\n  \"Yellow\": \"Žltá\",\n  \"Magenta\": \"Ružová\",\n  \"Cyan\": \"Tyrkysová\",\n  \"Background\": \"Pozadie\",\n  \"Window\": \"Okno\",\n  \"Transparent\": \"Priesvitné\",\n  \"Semi-Transparent\": \"Polopriesvitné\",\n  \"Opaque\": \"Plné\",\n  \"Font Size\": \"Veľkosť písma\",\n  \"Text Edge Style\": \"Typ okrajov písma\",\n  \"None\": \"Žiadne\",\n  \"Raised\": \"Zvýšené\",\n  \"Depressed\": \"Znížené\",\n  \"Uniform\": \"Pravidelné\",\n  \"Dropshadow\": \"S tieňom\",\n  \"Font Family\": \"Typ písma\",\n  \"Proportional Sans-Serif\": \"Proporčné bezpätkové\",\n  \"Monospace Sans-Serif\": \"Pravidelné, bezpätkové\",\n  \"Proportional Serif\": \"Proporčné pätkové\",\n  \"Monospace Serif\": \"Pravidelné pätkové\",\n  \"Casual\": \"Bežné\",\n  \"Script\": \"Písané\",\n  \"Small Caps\": \"Malé kapitálky\",\n  \"Reset\": \"Resetovať\",\n  \"restore all settings to the default values\": \"všetky nastavenia na základné hodnoty\",\n  \"Done\": \"Hotovo\",\n  \"Caption Settings Dialog\": \"Okno nastavení popiskov\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"Začiatok okna. Klávesa Escape zruší a zavrie okno.\",\n  \"End of dialog window.\": \"Koniec okna.\",\n  \"{1} is loading.\": \"{1} sa načíta.\"\n});","videojs.addLanguage('sl', {\n  \"Audio Player\": \"Avdio predvajalnik\",\n  \"Video Player\": \"Video predvajalnik\",\n  \"Play\": \"Predvajaj\",\n  \"Pause\": \"Začasno ustavi\",\n  \"Replay\": \"Predvajaj ponovno\",\n  \"Current Time\": \"Trenutni čas\",\n  \"Duration\": \"Trajanje\",\n  \"Remaining Time\": \"Preostali čas\",\n  \"Stream Type\": \"Vrsta podatkovnega toka\",\n  \"LIVE\": \"V ŽIVO\",\n  \"Seek to live, currently behind live\": \"Spremljaj v živo (trenutno v zaostanku)\",\n  \"Seek to live, currently playing live\": \"Spremljaj v živo (trenutno v živo)\",\n  \"Loaded\": \"Naloženo\",\n  \"Progress\": \"Napredek\",\n  \"Progress Bar\": \"Vrstica napredka\",\n  \"progress bar timing: currentTime={1} duration={2}\": \"{1} od {2}\",\n  \"Fullscreen\": \"Celozaslonski prikaz\",\n  \"Non-Fullscreen\": \"Prikaz na delu zaslona\",\n  \"Mute\": \"Izključi zvok\",\n  \"Unmute\": \"Vključi zvok\",\n  \"Playback Rate\": \"Hitrost predvajanja\",\n  \"Subtitles\": \"Podnapisi\",\n  \"subtitles off\": \"podnapisi izklopljeni\",\n  \"Captions\": \"Zvočni zapis\",\n  \"captions off\": \"zvočni zapis izklopljen\",\n  \"Chapters\": \"Poglavja\",\n  \"Descriptions\": \"Opisi\",\n  \"descriptions off\": \"opisi izklopljeni\",\n  \"Audio Track\": \"Zvočni posnetek\",\n  \"Volume Level\": \"Raven glasnosti\",\n  \"You aborted the media playback\": \"Prekinili ste predvajanje.\",\n  \"A network error caused the media download to fail part-way.\": \"Prenos multimedijske datoteke ni uspel zaradi napake v omrežju.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"Multimedijske datoteke ni bilo mogoče naložiti zaradi napake na strežniku oziroma omrežju ali ker ta oblika ni podprta.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"Predvajanje datoteke je bilo prekinjeno zaradi napak v datoteki ali ker uporablja funkcije, ki jih brskalnik ne podpira.\",\n  \"No compatible source was found for this media.\": \"Za to datoteko ni bil najden noben združljiv vir.\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"Datoteka je šifrirana in predvajalnik nima ključev za njeno dešifriranje.\",\n  \"Play Video\": \"Predvajaj\",\n  \"Close\": \"Zapri\",\n  \"Close Modal Dialog\": \"Zapri modalno okno\",\n  \"Modal Window\": \"Modalno okno\",\n  \"This is a modal window\": \"To je modalno okno\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"To okno lahko zaprete s pritiskom na tipko Escape ali z aktiviranjem gumba za zapiranje.\",\n  \", opens captions settings dialog\": \", odpre nastavitve za zvočni zapis\",\n  \", opens subtitles settings dialog\": \", odpre nastavitve za podnapise\",\n  \", opens descriptions settings dialog\": \", odpre nastavitve za opis\",\n  \", selected\": \", izbrano\",\n  \"captions settings\": \"nastavitve zvočnega zapisa\",\n  \"subtitles settings\": \"nastavitve podnapisov\",\n  \"descriptions settings\": \"nastavitve opisa\",\n  \"Text\": \"Tekst\",\n  \"White\": \"Bela\",\n  \"Black\": \"Črna\",\n  \"Red\": \"Rdeča\",\n  \"Green\": \"Zelena\",\n  \"Blue\": \"Modra\",\n  \"Yellow\": \"Rumena\",\n  \"Magenta\": \"Magenta\",\n  \"Cyan\": \"Cian\",\n  \"Background\": \"Ozadje\",\n  \"Window\": \"Okno\",\n  \"Transparent\": \"Prozorno\",\n  \"Semi-Transparent\": \"Delno prozorno\",\n  \"Opaque\": \"Neprozorno\",\n  \"Font Size\": \"Velikost pisave\",\n  \"Text Edge Style\": \"Slog roba besedila\",\n  \"None\": \"Brez\",\n  \"Raised\": \"Dvignjeno\",\n  \"Depressed\": \"Vtisnjeno\",\n  \"Uniform\": \"Enakomerno\",\n  \"Dropshadow\": \"S senco\",\n  \"Font Family\": \"Družina pisave\",\n  \"Small Caps\": \"Male črke\",\n  \"Reset\": \"Ponastavi\",\n  \"restore all settings to the default values\": \"obnovi vse nastavitve na privzete vrednosti\",\n  \"Done\": \"Končano\",\n  \"Caption Settings Dialog\": \"Pogovorno okno za nastavitve zvočnega zapisa\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"Začetek pogovornega okna. Escape bo preklical in zaprl okno.\",\n  \"End of dialog window.\": \"Konec pogovornega okna.\",\n  \"{1} is loading.\": \"{1} se nalaga.\",\n  \"Exit Picture-in-Picture\": \"Izhod iz slike v sliki\",\n  \"Picture-in-Picture\": \"Slika v sliki\"\n});","videojs.addLanguage('sr', {\n  \"Play\": \"Pusti\",\n  \"Pause\": \"Pauza\",\n  \"Current Time\": \"Trenutno vreme\",\n  \"Duration\": \"Vreme trajanja\",\n  \"Remaining Time\": \"Preostalo vreme\",\n  \"Stream Type\": \"Način strimovanja\",\n  \"LIVE\": \"UŽIVO\",\n  \"Loaded\": \"Učitan\",\n  \"Progress\": \"Progres\",\n  \"Fullscreen\": \"Pun ekran\",\n  \"Non-Fullscreen\": \"Mali ekran\",\n  \"Mute\": \"Prigušen\",\n  \"Unmute\": \"Ne-prigušen\",\n  \"Playback Rate\": \"Stopa reprodukcije\",\n  \"Subtitles\": \"Podnaslov\",\n  \"subtitles off\": \"Podnaslov deaktiviran\",\n  \"Captions\": \"Titlovi\",\n  \"captions off\": \"Titlovi deaktivirani\",\n  \"Chapters\": \"Poglavlja\",\n  \"You aborted the media playback\": \"Isključili ste reprodukciju videa.\",\n  \"A network error caused the media download to fail part-way.\": \"Video se prestao preuzimati zbog greške na mreži.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"Video se ne može reproducirati zbog servera, greške u mreži ili format nije podržan.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"Reprodukcija videa je zaustavljenja zbog greške u formatu ili zbog verzije vašeg pretraživača.\",\n  \"No compatible source was found for this media.\": \"Nije nađen nijedan kompatibilan izvor ovog videa.\"\n});","videojs.addLanguage('sv', {\n  \", opens captions settings dialog\": \", öppnar dialogruta för textning\",\n  \", opens descriptions settings dialog\": \", öppnar dialogruta för inställningar\",\n  \", opens subtitles settings dialog\": \", öppnar dialogruta för undertexter\",\n  \", selected\": \", vald\",\n  \"A network error caused the media download to fail part-way.\": \"Ett nätverksfel gjorde att nedladdningen av videon avbröts.\",\n  \"Audio Player\": \"Ljudspelare\",\n  \"Audio Track\": \"Ljudspår\",\n  \"Background\": \"Bakgrund\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"Början av dialogfönster. Escape avbryter och stänger fönstret.\",\n  \"Black\": \"Svart\",\n  \"Blue\": \"Blå\",\n  \"Caption Settings Dialog\": \"Dialogruta för textningsinställningar\",\n  \"Captions\": \"Text på\",\n  \"Casual\": \"Casual\",\n  \"Chapters\": \"Kapitel\",\n  \"Close\": \"Stäng\",\n  \"Close Modal Dialog\": \"Stäng dialogruta\",\n  \"Current Time\": \"Aktuell tid\",\n  \"Cyan\": \"Cyan\",\n  \"Depressed\": \"Deprimerad\",\n  \"Descriptions\": \"Beskrivningar\",\n  \"Done\": \"Klar\",\n  \"Dropshadow\": \"DropSkugga\",\n  \"Duration\": \"Total tid\",\n  \"End of dialog window.\": \"Slutet av dialogfönster.\",\n  \"Font Family\": \"Typsnittsfamilj\",\n  \"Font Size\": \"Textstorlek\",\n  \"Fullscreen\": \"Fullskärm\",\n  \"Green\": \"Grön\",\n  \"LIVE\": \"LIVE\",\n  \"Loaded\": \"Laddad\",\n  \"Magenta\": \"Magenta\",\n  \"Modal Window\": \"dialogruta\",\n  \"Monospace Sans-Serif\": \"Monospace Sans-Serif\",\n  \"Monospace Serif\": \"Monospace Serif\",\n  \"Mute\": \"Ljud av\",\n  \"No compatible source was found for this media.\": \"Det gick inte att hitta någon kompatibel källa för den här videon.\",\n  \"Non-Fullscreen\": \"Ej fullskärm\",\n  \"None\": \"Ingen\",\n  \"Opaque\": \"Opak\",\n  \"Pause\": \"Pausa\",\n  \"Play\": \"Spela\",\n  \"Play Video\": \"Spela upp video\",\n  \"Playback Rate\": \"Uppspelningshastighet\",\n  \"Progress\": \"Förlopp\",\n  \"Progress Bar\": \"förloppsmätare\",\n  \"Proportional Sans-Serif\": \"Proportionell Sans-Serif\",\n  \"Proportional Serif\": \"Proportionell Serif\",\n  \"Raised\": \"Raised\",\n  \"Red\": \"Röd\",\n  \"Remaining Time\": \"Återstående tid\",\n  \"Replay\": \"Spela upp igen\",\n  \"Reset\": \"Återställ\",\n  \"Script\": \"Manus\",\n  \"Seek to live, currently behind live\": \"Återgå till live, uppspelningen är inte live\",\n  \"Seek to live, currently playing live\": \"Återgå till live, uppspelningen är live\",\n  \"Semi-Transparent\": \"Semi-transparent\",\n  \"Small Caps\": \"Small-Caps\",\n  \"Stream Type\": \"Strömningstyp\",\n  \"Subtitles\": \"Text på\",\n  \"Text\": \"Text\",\n  \"Text Edge Style\": \"Textkantstil\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"Det gick inte att ladda videon, antingen på grund av ett server- eller nätverksfel, eller för att formatet inte stöds.\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"Mediat är krypterat och vi har inte nycklarna för att dekryptera det.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"Uppspelningen avbröts på grund av att videon är skadad, eller också för att videon använder funktioner som din webbläsare inte stöder.\",\n  \"This is a modal window\": \"Det här är ett dialogruta\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"Den här dialogrutan kan stängas genom att trycka på Escape-tangenten eller stäng knappen.\",\n  \"Transparent\": \"Transparent\",\n  \"Uniform\": \"Uniform\",\n  \"Unmute\": \"Ljud på\",\n  \"Video Player\": \"Videospelare\",\n  \"Volume Level\": \"Volymnivå\",\n  \"White\": \"Vit\",\n  \"Window\": \"Fönster\",\n  \"Yellow\": \"Gul\",\n  \"You aborted the media playback\": \"Du har avbrutit videouppspelningen.\",\n  \"captions off\": \"Text av\",\n  \"captions settings\": \"textningsinställningar\",\n  \"descriptions off\": \"beskrivningar av\",\n  \"descriptions settings\": \"beskrivningsinställningar\",\n  \"progress bar timing: currentTime={1} duration={2}\": \"{1} av {2}\",\n  \"restore all settings to the default values\": \"återställ alla inställningar till standardvärden\",\n  \"subtitles off\": \"Text av\",\n  \"subtitles settings\": \"undertextsinställningar\",\n  \"{1} is loading.\": \"{1} laddar.\"\n});","videojs.addLanguage('te', {\n  \"Audio Player\": \"ఆడియో ప్లేయర్\",\n  \"Video Player\": \"వీడియో ప్లేయర్\",\n  \"Play\": \"ప్లే\",\n  \"Pause\": \"పాజ్\",\n  \"Replay\": \"రీప్లే\",\n  \"Current Time\": \"ప్రస్తుత సమయం\",\n  \"Duration\": \"వ్యవధి\",\n  \"Remaining Time\": \"మిగిలిన సమయం\",\n  \"Stream Type\": \"స్ట్రీమ్ రకం\",\n  \"LIVE\": \"లైవ్\",\n  \"Seek to live, currently behind live\": \"ప్రత్యక్ష ప్రసారానికి వెళ్ళండి, ప్రస్తుతం ప్రత్యక్ష ప్రసారానికి వెనుకబడి ఉంది\",\n  \"Seek to live, currently playing live\": \"ప్రత్యక్ష ప్రసారానికి వెళ్ళండి, ప్రస్తుతం ప్రత్యక్ష ప్రసారం అవుతోంది\",\n  \"Loaded\": \"లోడ్ చేయబడింది\",\n  \"Progress\": \"పురోగతి\",\n  \"Progress Bar\": \"ప్రోగ్రెస్ బార్\",\n  \"progress bar timing: currentTime={1} duration={2}\": \"{1} యొక్క {2}\",\n  \"Fullscreen\": \"పూర్తి స్క్రీన్\",\n  \"Non-Fullscreen\": \"పూర్తి స్క్రీన్ నుండి నిష్క్రమించండి\",\n  \"Mute\": \"మ్యూట్\",\n  \"Unmute\": \"అన్మ్యూట్ చేయండి\",\n  \"Playback Rate\": \"ప్లేబ్యాక్ రేట్\",\n  \"Subtitles\": \"ఉపశీర్షికలు\",\n  \"subtitles off\": \"ఉపశీర్షికలు ఆఫ్ చేయండి\",\n  \"Captions\": \"శీర్షికలు\",\n  \"captions off\": \"శీర్షికలు ఆఫ్ చేయండి\",\n  \"Chapters\": \"అధ్యాయాలు\",\n  \"Descriptions\": \"వివరణలు\",\n  \"descriptions off\": \"వివరణలు ఆఫ్ చేయండి\",\n  \"Audio Track\": \"ఆడియో ట్రాక్\",\n  \"Volume Level\": \"వాల్యూమ్ స్థాయి\",\n  \"You aborted the media playback\": \"మీరు మీడియా ప్లేబ్యాక్‌ను రద్దు చేశారు\",\n  \"A network error caused the media download to fail part-way.\": \"నెట్‌వర్క్ లోపం వలన మీడియా డౌన్‌లోడ్ విఫలమైంది.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"సర్వర్ లేదా నెట్‌వర్క్ విఫలమైనందున లేదా ఫార్మాట్‌కు మద్దతు లేనందున మీడియాను లోడ్ చేయడం సాధ్యం కాలేదు.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"అవినీతి సమస్య కారణంగా లేదా మీ బ్రౌజర్ మద్దతు ఇవ్వని లక్షణాలను మీడియా ఉపయోగించినందున మీడియా ప్లేబ్యాక్ నిలిపివేయబడింది.\",\n  \"No compatible source was found for this media.\": \"ఈ మీడియాకు అనుకూలమైన మూలం కనుగొనబడలేదు.\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"మీడియా గుప్తీకరించబడింది మరియు దానిని డీక్రిప్ట్ చేయడానికి మాకు కీలు లేవు.\",\n  \"Play Video\": \"వీడియో ప్లే చేయండి\",\n  \"Close\": \"మూసివేయండి\",\n  \"Close Modal Dialog\": \"మోడల్ డైలాగ్‌ను మూసివేయండి\",\n  \"Modal Window\": \"మోడల్ విండో\",\n  \"This is a modal window\": \"ఇది మోడల్ విండో\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"ఎస్కేప్ కీని నొక్కడం ద్వారా లేదా క్లోజ్ బటన్‌ను యాక్టివేట్ చేయడం ద్వారా ఈ మోడల్‌ను మూసివేయవచ్చు.\",\n  \", opens captions settings dialog\": \", శీర్షికల సెట్టింగ్‌ల డైలాగ్‌ను తెరుస్తుంది\",\n  \", opens subtitles settings dialog\": \", ఉపశీర్షికల సెట్టింగుల డైలాగ్‌ను తెరుస్తుంది\",\n  \", opens descriptions settings dialog\": \", వివరణల సెట్టింగుల డైలాగ్‌ను తెరుస్తుంది\",\n  \", selected\": \", ఎంచుకోబడింది\",\n  \"captions settings\": \"శీర్షికల సెట్టింగులు\",\n  \"subtitles settings\": \"ఉపశీర్షికల సెట్టింగులు\",\n  \"descriptions settings\": \"వివరణల సెట్టింగులు\",\n  \"Text\": \"వచనం\",\n  \"White\": \"తెలుపు\",\n  \"Black\": \"నలుపు\",\n  \"Red\": \"ఎరుపు\",\n  \"Green\": \"ఆకుపచ్చ\",\n  \"Blue\": \"నీలం\",\n  \"Yellow\": \"పసుపు\",\n  \"Magenta\": \"మెజెంటా\",\n  \"Cyan\": \"సియాన్\",\n  \"Background\": \"నేపధ్యం\",\n  \"Window\": \"కిటికీ\",\n  \"Transparent\": \"పారదర్శక\",\n  \"Semi-Transparent\": \"సెమీ-పారదర్శక\",\n  \"Opaque\": \"అపారదర్శక\",\n  \"Font Size\": \"ఫాంట్ పరిమాణం\",\n  \"Text Edge Style\": \"టెక్స్ట్ ఎడ్జ్ శైలి\",\n  \"None\": \"ఏదీ లేదు\",\n  \"Raised\": \"పెంచబడింది\",\n  \"Depressed\": \"అణగారిన\",\n  \"Uniform\": \"ఏకరీతి\",\n  \"Dropshadow\": \"డ్రాప్‌షాడో\",\n  \"Font Family\": \"ఫాంట్ కుటుంబం\",\n  \"Proportional Sans-Serif\": \"ప్రొపోర్షన్ సాన్స్-సెరిఫ్\",\n  \"Monospace Sans-Serif\": \"మోనోస్పేస్ సాన్స్-సెరిఫ్\",\n  \"Proportional Serif\": \"ప్రొపోర్షన్ సెరిఫ్\",\n  \"Monospace Serif\": \"మోనోస్పేస్ సెరిఫ్\",\n  \"Casual\": \"సాధారణ\",\n  \"Script\": \"స్క్రిప్ట్\",\n  \"Small Caps\": \"చిన్న క్యాప్స్\",\n  \"Reset\": \"రీసెట్ చేయండి\",\n  \"restore all settings to the default values\": \"అన్ని సెట్టింగులను డిఫాల్ట్ విలువలకు పునరుద్ధరించండి\",\n  \"Done\": \"పూర్తయింది\",\n  \"Caption Settings Dialog\": \"శీర్షిక సెట్టింగ్‌ల డైలాగ్\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"డైలాగ్ విండో ప్రారంభం. ఎస్కేప్ విండోను రద్దు చేస్తుంది మరియు మూసివేస్తుంది.\",\n  \"End of dialog window.\": \"డైలాగ్ విండో ముగింపు.\",\n  \"{1} is loading.\": \"{1} లోడ్ అవుతోంది.\",\n  \"Exit Picture-in-Picture\": \"పిక్చర్-ఇన్-పిక్చర్ నుండి నిష్క్రమించండి\",\n  \"Picture-in-Picture\": \"పిక్చర్-ఇన్-పిక్చర్\"\n});","videojs.addLanguage('th', {\n  \"Audio Player\": \"โปรแกรมเล่นเสียง\",\n  \"Video Player\": \"โปรแกรมเล่นวิดีโอ\",\n  \"Play\": \"เล่น\",\n  \"Pause\": \"หยุดชั่วคราว\",\n  \"Replay\": \"เล่นซ้ำ\",\n  \"Current Time\": \"เวลาปัจจุบัน\",\n  \"Duration\": \"ระยะเวลา\",\n  \"Remaining Time\": \"เวลาที่เหลือ\",\n  \"Stream Type\": \"ประเภทของสตรีม\",\n  \"LIVE\": \"ถ่ายทอดสด\",\n  \"Seek to live, currently behind live\": \"หาโอกาสที่จะถ่ายทอดสด กำลังอยู่เบื้องหลังการถ่ายทอดสดในขณะนี้\",\n  \"Seek to live, currently playing live\": \"หาโอกาสที่จะถ่ายทอดสด กำลังเล่นแบบสดในขณะนี้\",\n  \"Loaded\": \"โหลดแล้ว\",\n  \"Progress\": \"ความคืบหน้า\",\n  \"Progress Bar\": \"แถบแสดงความคืบหน้า\",\n  \"progress bar timing: currentTime={1} duration={2}\": \"{1} ของ {2}\",\n  \"Fullscreen\": \"แบบเต็มหน้าจอ\",\n  \"Non-Fullscreen\": \"ไม่ใช่แบบเต็มหน้าจอ\",\n  \"Mute\": \"ปิดเสียง\",\n  \"Unmute\": \"ยกเลิกการปิดเสียง\",\n  \"Playback Rate\": \"อัตราการเล่น\",\n  \"Subtitles\": \"คำบรรยาย\",\n  \"subtitles off\": \"ปิดคำบรรยาย\",\n  \"Captions\": \"คำอธิบายภาพ\",\n  \"captions off\": \"ปิดคำอธิบายภาพ\",\n  \"Chapters\": \"บท\",\n  \"Descriptions\": \"คำอธิบาย\",\n  \"descriptions off\": \"ปิดคำอธิบาย\",\n  \"Audio Track\": \"แทร็กเสียง\",\n  \"Volume Level\": \"ระดับเสียง\",\n  \"You aborted the media playback\": \"คุณยกเลิกการเล่นสื่อแล้ว\",\n  \"A network error caused the media download to fail part-way.\": \"ข้อผิดพลาดของเครือข่ายทำให้การดาวน์โหลดสื่อไม่สำเร็จเป็นบางส่วน\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"ไม่สามารถโหลดสื่อได้ โดยอาจเป็นเพราะเซิร์ฟเวอร์หรือเครือข่ายล้มเหลว หรือเพราะรูปแบบไม่ได้รับการรองรับ\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"การเล่นสื่อถูกยกเลิกเนื่องจากปัญหาเกี่ยวกับความเสียหาย หรือเนื่องจากสื่อใช้ฟีเจอร์ที่เบราว์เซอร์ของคุณไม่รองรับ\",\n  \"No compatible source was found for this media.\": \"ไม่พบแหล่งที่เข้ากันได้สำหรับสื่อนี้\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"สื่อถูกเข้ารหัสลับแล้ว และเราไม่มีคีย์ที่จะถอดรหัสลับดังกล่าว\",\n  \"Play Video\": \"เล่นวิดีโอ\",\n  \"Close\": \"ปิด\",\n  \"Close Modal Dialog\": \"ปิดกล่องโต้ตอบโมดอล\",\n  \"Modal Window\": \"หน้าต่างโมดอล\",\n  \"This is a modal window\": \"รายการนี้เป็นหน้าต่างโมดอล\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"คุณสามารถปิดโมดอลนี้โดยกดปุ่ม Escape หรือเปิดใช้งานปุ่มปิด\",\n  \", opens captions settings dialog\": \", เปิดกล่องโต้ตอบการตั้งค่าคำอธิบายภาพ\",\n  \", opens subtitles settings dialog\": \", เปิดกล่องโต้ตอบการตั้งค่าคำบรรยาย\",\n  \", opens descriptions settings dialog\": \", เปิดกล่องโต้ตอบการตั้งค่าคำอธิบาย\",\n  \", selected\": \", เลือกแล้ว\",\n  \"captions settings\": \"การตั้งค่าคำอธิบายภาพ\",\n  \"subtitles settings\": \"การตั้งค่าคำบรรยาย\",\n  \"descriptions settings\": \"การตั้งค่าคำอธิบาย\",\n  \"Text\": \"ข้อความ\",\n  \"White\": \"สีขาว\",\n  \"Black\": \"สีดำ\",\n  \"Red\": \"สีแดง\",\n  \"Green\": \"สีเขียว\",\n  \"Blue\": \"สีน้ำเงิน\",\n  \"Yellow\": \"สีเหลือง\",\n  \"Magenta\": \"สีม่วงแดง\",\n  \"Cyan\": \"สีน้ำเงินอมเขียว\",\n  \"Background\": \"พื้นหลัง\",\n  \"Window\": \"หน้าต่าง\",\n  \"Transparent\": \"โปร่งใส\",\n  \"Semi-Transparent\": \"กึ่งโปร่งใส\",\n  \"Opaque\": \"ทึบ\",\n  \"Font Size\": \"ขนาดแบบอักษร\",\n  \"Text Edge Style\": \"ลักษณะขอบข้อความ\",\n  \"None\": \"ไม่มี\",\n  \"Raised\": \"ยกขึ้น\",\n  \"Depressed\": \"ปล่อยออก\",\n  \"Uniform\": \"รูปแบบ\",\n  \"Dropshadow\": \"เพิ่มเงา\",\n  \"Font Family\": \"ตระกูลแบบอักษร\",\n  \"Proportional Sans-Serif\": \"Sans-Serif ตามสัดส่วน\",\n  \"Monospace Sans-Serif\": \"Sans-Serif ช่องว่างเดี่ยว\",\n  \"Proportional Serif\": \"Serif ตามสัดส่วน\",\n  \"Monospace Serif\": \"Serif ช่องว่างเดี่ยว\",\n  \"Casual\": \"ไม่เป็นทางการ\",\n  \"Script\": \"สคริปต์\",\n  \"Small Caps\": \"ตัวพิมพ์ใหญ่ขนาดเล็ก\",\n  \"Reset\": \"รีเซ็ต\",\n  \"restore all settings to the default values\": \"คืนค่าการตั้งค่าท้้งหมดให้เป็นค่าเริ่มต้น\",\n  \"Done\": \"เสร็จสิ้น\",\n  \"Caption Settings Dialog\": \"กล่องโต้ตอบการตั้งค่าคำอธิบายภาพ\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"การเริ่มต้นหน้าต่างกล่องโต้ตอบ Escape จะยกเลิกและปิดหน้าต่าง\",\n  \"End of dialog window.\": \"สิ้นสุดหน้าต่างกล่องโต้ตอบ\",\n  \"{1} is loading.\": \"กำลังโหลด {1}\",\n  \"Exit Picture-in-Picture\": \"ออกจากการเล่นภาพควบคู่\",\n  \"Picture-in-Picture\": \"การเล่นภาพควบคู่\"\n});","videojs.addLanguage('tr', {\n  \"Play\": \"Oynat\",\n  \"Pause\": \"Duraklat\",\n  \"Replay\": \"Yeniden Oynat\",\n  \"Current Time\": \"Süre\",\n  \"Duration\": \"Toplam Süre\",\n  \"Remaining Time\": \"Kalan Süre\",\n  \"Stream Type\": \"Yayın Tipi\",\n  \"LIVE\": \"CANLI\",\n  \"Loaded\": \"Yüklendi\",\n  \"Progress\": \"Yükleniyor\",\n  \"Fullscreen\": \"Tam Ekran\",\n  \"Non-Fullscreen\": \"Küçük Ekran\",\n  \"Mute\": \"Ses Kapa\",\n  \"Unmute\": \"Ses Aç\",\n  \"Playback Rate\": \"Oynatma Hızı\",\n  \"Subtitles\": \"Altyazı\",\n  \"subtitles off\": \"Altyazı Kapalı\",\n  \"Captions\": \"Altyazı\",\n  \"captions off\": \"Altyazı Kapalı\",\n  \"Chapters\": \"Bölümler\",\n  \"Close Modal Dialog\": \"Dialogu Kapat\",\n  \"Descriptions\": \"Açıklamalar\",\n  \"descriptions off\": \"Açıklamalar kapalı\",\n  \"Audio Track\": \"Ses Dosyası\",\n  \"You aborted the media playback\": \"Video oynatmayı iptal ettiniz\",\n  \"A network error caused the media download to fail part-way.\": \"Video indirilirken bağlantı sorunu oluştu.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"Video oynatılamadı, ağ ya da sunucu hatası veya belirtilen format desteklenmiyor.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"Tarayıcınız desteklemediği için videoda hata oluştu.\",\n  \"No compatible source was found for this media.\": \"Video için kaynak bulunamadı.\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"Video, şifrelenmiş bir kaynaktan geliyor ve oynatmak için gerekli anahtar bulunamadı.\",\n  \"Play Video\": \"Videoyu Oynat\",\n  \"Close\": \"Kapat\",\n  \"Modal Window\": \"Modal Penceresi\",\n  \"This is a modal window\": \"Bu bir modal penceresidir\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"Bu modal ESC tuşuna basarak ya da kapata tıklanarak kapatılabilir.\",\n  \", opens captions settings dialog\": \", altyazı ayarları menüsünü açar\",\n  \", opens subtitles settings dialog\": \", altyazı ayarları menüsünü açar\",\n  \", opens descriptions settings dialog\": \", açıklama ayarları menüsünü açar\",\n  \", selected\": \", seçildi\",\n  \"captions settings\": \"altyazı ayarları\",\n  \"subtitles settings\": \"altyazı ayarları\",\n  \"descriptions settings\": \"açıklama ayarları\",\n  \"Text\": \"Yazı\",\n  \"White\": \"Beyaz\",\n  \"Black\": \"Siyah\",\n  \"Red\": \"Kırmızı\",\n  \"Green\": \"Yeşil\",\n  \"Blue\": \"Mavi\",\n  \"Yellow\": \"Sarı\",\n  \"Magenta\": \"Macenta\",\n  \"Cyan\": \"Açık Mavi (Camgöbeği)\",\n  \"Background\": \"Arka plan\",\n  \"Window\": \"Pencere\",\n  \"Transparent\": \"Saydam\",\n  \"Semi-Transparent\": \"Yarı-Saydam\",\n  \"Opaque\": \"Mat\",\n  \"Font Size\": \"Yazı Boyutu\",\n  \"Text Edge Style\": \"Yazı Kenarlıkları\",\n  \"None\": \"Hiçbiri\",\n  \"Raised\": \"Kabartılmış\",\n  \"Depressed\": \"Yassı\",\n  \"Uniform\": \"Düz\",\n  \"Dropshadow\": \"Gölgeli\",\n  \"Font Family\": \"Yazı Tipi\",\n  \"Proportional Sans-Serif\": \"Orantılı Sans-Serif\",\n  \"Monospace Sans-Serif\": \"Eşaralıklı Sans-Serif\",\n  \"Proportional Serif\": \"Orantılı Serif\",\n  \"Monospace Serif\": \"Eşaralıklı Serif\",\n  \"Casual\": \"Gündelik\",\n  \"Script\": \"El Yazısı\",\n  \"Small Caps\": \"Küçük Boyutlu Büyük Harfli\",\n  \"Done\": \"Tamam\",\n  \"Caption Settings Dialog\": \"Altyazı Ayarları Menüsü\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"Diyalog penceresinin başlangıcı. ESC tuşu işlemi iptal edip pencereyi kapatacaktır.\"\n});","videojs.addLanguage('uk', {\n  \"Audio Player\": \"Аудіопрогравач\",\n  \"Video Player\": \"Відеопрогравач\",\n  \"Play\": \"Відтворити\",\n  \"Pause\": \"Призупинити\",\n  \"Replay\": \"Відтворити знову\",\n  \"Current Time\": \"Поточний час\",\n  \"Duration\": \"Тривалість\",\n  \"Remaining Time\": \"Час, що залишився\",\n  \"Stream Type\": \"Тип потоку\",\n  \"LIVE\": \"НАЖИВО\",\n  \"Loaded\": \"Завантаження\",\n  \"Progress\": \"Прогрес\",\n  \"Progress Bar\": \"Індикатор завантаження\",\n  \"progress bar timing: currentTime={1} duration={2}\": \"{1} з {2}\",\n  \"Fullscreen\": \"Повноекранний режим\",\n  \"Non-Fullscreen\": \"Неповноекранний режим\",\n  \"Mute\": \"Без звуку\",\n  \"Unmute\": \"Зі звуком\",\n  \"Playback Rate\": \"Швидкість відтворення\",\n  \"Subtitles\": \"Субтитри\",\n  \"subtitles off\": \"Без субтитрів\",\n  \"Captions\": \"Підписи\",\n  \"captions off\": \"Без підписів\",\n  \"Chapters\": \"Розділи\",\n  \"Close Modal Dialog\": \"Закрити модальний діалог\",\n  \"Descriptions\": \"Описи\",\n  \"descriptions off\": \"Без описів\",\n  \"Audio Track\": \"Аудіодоріжка\",\n  \"Volume Level\": \"Рівень гучності\",\n  \"You aborted the media playback\": \"Ви припинили відтворення відео\",\n  \"A network error caused the media download to fail part-way.\": \"Помилка мережі викликала збій під час завантаження відео.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"Неможливо завантажити відео через мережевий чи серверний збій або формат не підтримується.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"Відтворення відео було припинено через пошкодження або у зв'язку з тим, що відео використовує функції, які не підтримуються вашим браузером.\",\n  \"No compatible source was found for this media.\": \"Сумісні джерела для цього відео відсутні.\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"Відео в зашифрованому вигляді, і ми не маємо ключі для розшифровки.\",\n  \"Play Video\": \"Відтворити відео\",\n  \"Close\": \"Закрити\",\n  \"Modal Window\": \"Модальне вікно\",\n  \"This is a modal window\": \"Це модальне вікно.\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"Модальне вікно можна закрити, натиснувши клавішу Esc або кнопку закриття вікна.\",\n  \", opens captions settings dialog\": \", відкриється діалогове вікно налаштування підписів\",\n  \", opens subtitles settings dialog\": \", відкриється діалогове вікно налаштування субтитрів\",\n  \", opens descriptions settings dialog\": \", відкриється діалогове вікно налаштування описів\",\n  \", selected\": \", обраний\",\n  \"captions settings\": \"налаштування підписів\",\n  \"subtitles settings\": \"налаштування субтитрів\",\n  \"descriptions settings\": \"налаштування описів\",\n  \"Text\": \"Текст\",\n  \"White\": \"Білий\",\n  \"Black\": \"Чорний\",\n  \"Red\": \"Червоний\",\n  \"Green\": \"Зелений\",\n  \"Blue\": \"Синій\",\n  \"Yellow\": \"Жовтий\",\n  \"Magenta\": \"Пурпурний\",\n  \"Cyan\": \"Блакитний\",\n  \"Background\": \"Фон\",\n  \"Window\": \"Вікно\",\n  \"Transparent\": \"Прозорий\",\n  \"Semi-Transparent\": \"Напівпрозорий\",\n  \"Opaque\": \"Прозорість\",\n  \"Font Size\": \"Розмір шрифту\",\n  \"Text Edge Style\": \"Стиль краю тексту\",\n  \"None\": \"Нічого\",\n  \"Raised\": \"Піднятий\",\n  \"Depressed\": \"Знижений\",\n  \"Uniform\": \"Однаковий\",\n  \"Dropshadow\": \"Тінь\",\n  \"Font Family\": \"Шрифт\",\n  \"Proportional Sans-Serif\": \"Пропорційний без засічок\",\n  \"Monospace Sans-Serif\": \"Моноширинний без засічок\",\n  \"Proportional Serif\": \"Пропорційний із засічками\",\n  \"Monospace Serif\": \"Моноширинний із засічками\",\n  \"Casual\": \"Випадковий\",\n  \"Script\": \"Писемний\",\n  \"Small Caps\": \"Малі прописні\",\n  \"Reset\": \"Скинути\",\n  \"restore all settings to the default values\": \"скинути всі налаштування за замовчуванням\",\n  \"Done\": \"Готово\",\n  \"Caption Settings Dialog\": \"Діалог налаштувань підпису\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"Початок діалоговго вікна. Кнопка Escape закриє або скасує вікно\",\n  \"End of dialog window.\": \"Кінець діалогового вікна.\",\n  \"{1} is loading.\": \"{1} завантажується.\"\n});","videojs.addLanguage('vi', {\n  \"Audio Player\": \"Trình phát Audio\",\n  \"Video Player\": \"Trình phát Video\",\n  \"Play\": \"Phát\",\n  \"Pause\": \"Tạm dừng\",\n  \"Replay\": \"Phát lại\",\n  \"Current Time\": \"Thời gian hiện tại\",\n  \"Duration\": \"Độ dài\",\n  \"Remaining Time\": \"Thời gian còn lại\",\n  \"Stream Type\": \"Kiểu Stream\",\n  \"LIVE\": \"TRỰC TIẾP\",\n  \"Loaded\": \"Đã tải\",\n  \"Progress\": \"Tiến trình\",\n  \"Progress Bar\": \"Thanh tiến trình\",\n  \"progress bar timing: currentTime={1} duration={2}\": \"{1} của {2}\",\n  \"Fullscreen\": \"Toàn màn hình\",\n  \"Non-Fullscreen\": \"Thoát toàn màn hình\",\n  \"Mute\": \"Tắt tiếng\",\n  \"Unmute\": \"Bật âm thanh\",\n  \"Playback Rate\": \"Tỉ lệ phát lại\",\n  \"Subtitles\": \"Phụ đề\",\n  \"subtitles off\": \"tắt phụ đề\",\n  \"Captions\": \"Chú thích\",\n  \"captions off\": \"tắt chú thích\",\n  \"Chapters\": \"Chương\",\n  \"Descriptions\": \"Mô tả\",\n  \"descriptions off\": \"tắt mô tả\",\n  \"Audio Track\": \"Track âm thanh\",\n  \"Volume Level\": \"Mức âm lượng\",\n  \"You aborted the media playback\": \"Bạn đã hủy việc phát lại media.\",\n  \"A network error caused the media download to fail part-way.\": \"Một lỗi mạng dẫn đến việc tải media bị lỗi.\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"Video không tải được, mạng hay server có lỗi hoặc định dạng không được hỗ trợ.\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"Phát media đã bị hủy do một sai lỗi hoặc media sử dụng những tính năng trình duyệt không hỗ trợ.\",\n  \"No compatible source was found for this media.\": \"Không có nguồn tương thích cho media này.\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"Media đã được mã hóa và chúng tôi không có để giải mã nó.\",\n  \"Play Video\": \"Phát Video\",\n  \"Close\": \"Đóng\",\n  \"Close Modal Dialog\": \"Đóng cửa sổ\",\n  \"Modal Window\": \"Cửa sổ\",\n  \"This is a modal window\": \"Đây là một cửa sổ\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"Cửa sổ này có thể thoát bằng việc nhấn phím Esc hoặc kích hoạt nút đóng.\",\n  \", opens captions settings dialog\": \", mở hộp thoại cài đặt chú thích\",\n  \", opens subtitles settings dialog\": \", mở hộp thoại cài đặt phụ đề\",\n  \", opens descriptions settings dialog\": \", mở hộp thoại cài đặt mô tả\",\n  \", selected\": \", đã chọn\",\n  \"captions settings\": \"cài đặt chú thích\",\n  \"subtitles settings\": \"cài đặt phụ đề\",\n  \"descriptions settings\": \"cài đặt mô tả\",\n  \"Text\": \"Văn bản\",\n  \"White\": \"Trắng\",\n  \"Black\": \"Đen\",\n  \"Red\": \"Đỏ\",\n  \"Green\": \"Xanh lá cây\",\n  \"Blue\": \"Xanh da trời\",\n  \"Yellow\": \"Vàng\",\n  \"Magenta\": \"Đỏ tươi\",\n  \"Cyan\": \"Lam\",\n  \"Background\": \"Nền\",\n  \"Window\": \"Cửa sổ\",\n  \"Transparent\": \"Trong suốt\",\n  \"Semi-Transparent\": \"Bán trong suốt\",\n  \"Opaque\": \"Mờ\",\n  \"Font Size\": \"Kích cỡ phông chữ\",\n  \"Text Edge Style\": \"Dạng viền văn bản\",\n  \"None\": \"None\",\n  \"Raised\": \"Raised\",\n  \"Depressed\": \"Depressed\",\n  \"Uniform\": \"Uniform\",\n  \"Dropshadow\": \"Dropshadow\",\n  \"Font Family\": \"Phông chữ\",\n  \"Proportional Sans-Serif\": \"Proportional Sans-Serif\",\n  \"Monospace Sans-Serif\": \"Monospace Sans-Serif\",\n  \"Proportional Serif\": \"Proportional Serif\",\n  \"Monospace Serif\": \"Monospace Serif\",\n  \"Casual\": \"Casual\",\n  \"Script\": \"Script\",\n  \"Small Caps\": \"Small Caps\",\n  \"Reset\": \"Đặt lại\",\n  \"restore all settings to the default values\": \"khôi phục lại tất cả các cài đặt về giá trị mặc định\",\n  \"Done\": \"Xong\",\n  \"Caption Settings Dialog\": \"Hộp thoại cài đặt chú thích\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"Bắt đầu cửa sổ hộp thoại. Esc sẽ thoát và đóng cửa sổ.\",\n  \"End of dialog window.\": \"Kết thúc cửa sổ hộp thoại.\"\n});","videojs.addLanguage('zh-CN', {\n  \"Play\": \"播放\",\n  \"Pause\": \"暂停\",\n  \"Current Time\": \"当前时间\",\n  \"Duration\": \"时长\",\n  \"Remaining Time\": \"剩余时间\",\n  \"Stream Type\": \"媒体流类型\",\n  \"LIVE\": \"直播\",\n  \"Loaded\": \"加载完成\",\n  \"Progress\": \"进度\",\n  \"Fullscreen\": \"全屏\",\n  \"Non-Fullscreen\": \"退出全屏\",\n  \"Picture-in-Picture\": \"画中画\",\n  \"Exit Picture-in-Picture\": \"退出画中画\",\n  \"Mute\": \"静音\",\n  \"Unmute\": \"取消静音\",\n  \"Playback Rate\": \"播放速度\",\n  \"Subtitles\": \"字幕\",\n  \"subtitles off\": \"关闭字幕\",\n  \"Captions\": \"内嵌字幕\",\n  \"captions off\": \"关闭内嵌字幕\",\n  \"Chapters\": \"节目段落\",\n  \"Close Modal Dialog\": \"关闭弹窗\",\n  \"Descriptions\": \"描述\",\n  \"descriptions off\": \"关闭描述\",\n  \"Audio Track\": \"音轨\",\n  \"You aborted the media playback\": \"视频播放被终止\",\n  \"A network error caused the media download to fail part-way.\": \"网络错误导致视频下载中途失败。\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"视频因格式不支持或者服务器或网络的问题无法加载。\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"由于视频文件损坏或是该视频使用了你的浏览器不支持的功能，播放终止。\",\n  \"No compatible source was found for this media.\": \"无法找到此视频兼容的源。\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"视频已加密，无法解密。\",\n  \"Play Video\": \"播放视频\",\n  \"Close\": \"关闭\",\n  \"Modal Window\": \"弹窗\",\n  \"This is a modal window\": \"这是一个弹窗\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"可以按ESC按键或启用关闭按钮来关闭此弹窗。\",\n  \", opens captions settings dialog\": \", 开启标题设置弹窗\",\n  \", opens subtitles settings dialog\": \", 开启字幕设置弹窗\",\n  \", opens descriptions settings dialog\": \", 开启描述设置弹窗\",\n  \", selected\": \", 选择\",\n  \"captions settings\": \"字幕设定\",\n  \"Audio Player\": \"音频播放器\",\n  \"Video Player\": \"视频播放器\",\n  \"Replay\": \"重新播放\",\n  \"Progress Bar\": \"进度条\",\n  \"Volume Level\": \"音量\",\n  \"subtitles settings\": \"字幕设定\",\n  \"descriptions settings\": \"描述设定\",\n  \"Text\": \"文字\",\n  \"White\": \"白\",\n  \"Black\": \"黑\",\n  \"Red\": \"红\",\n  \"Green\": \"绿\",\n  \"Blue\": \"蓝\",\n  \"Yellow\": \"黄\",\n  \"Magenta\": \"紫红\",\n  \"Cyan\": \"青\",\n  \"Background\": \"背景\",\n  \"Window\": \"窗口\",\n  \"Transparent\": \"透明\",\n  \"Semi-Transparent\": \"半透明\",\n  \"Opaque\": \"不透明\",\n  \"Font Size\": \"字体尺寸\",\n  \"Text Edge Style\": \"字体边缘样式\",\n  \"None\": \"无\",\n  \"Raised\": \"浮雕\",\n  \"Depressed\": \"压低\",\n  \"Uniform\": \"均匀\",\n  \"Dropshadow\": \"下阴影\",\n  \"Font Family\": \"字体库\",\n  \"Proportional Sans-Serif\": \"比例无细体\",\n  \"Monospace Sans-Serif\": \"单间隔无细体\",\n  \"Proportional Serif\": \"比例细体\",\n  \"Monospace Serif\": \"单间隔细体\",\n  \"Casual\": \"舒适\",\n  \"Script\": \"手写体\",\n  \"Small Caps\": \"小型大写字体\",\n  \"Reset\": \"重置\",\n  \"restore all settings to the default values\": \"恢复全部设定至预设值\",\n  \"Done\": \"完成\",\n  \"Caption Settings Dialog\": \"字幕设定窗口\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"打开对话窗口。Escape键将取消并关闭对话窗口\",\n  \"End of dialog window.\": \"结束对话窗口\",\n  \"Seek to live, currently behind live\": \"尝试直播，当前为延时播放\",\n  \"Seek to live, currently playing live\": \"尝试直播，当前为实时播放\",\n  \"progress bar timing: currentTime={1} duration={2}\": \"{1}/{2}\",\n  \"{1} is loading.\": \"正在加载 {1}。\"\n});","videojs.addLanguage('zh-Hans', {\n  \"Play\": \"播放\",\n  \"Pause\": \"暂停\",\n  \"Current Time\": \"当前时间\",\n  \"Duration\": \"时长\",\n  \"Remaining Time\": \"剩余时间\",\n  \"Stream Type\": \"媒体流类型\",\n  \"LIVE\": \"直播\",\n  \"Loaded\": \"加载完成\",\n  \"Progress\": \"进度\",\n  \"Fullscreen\": \"全屏\",\n  \"Non-Fullscreen\": \"退出全屏\",\n  \"Picture-in-Picture\": \"画中画\",\n  \"Exit Picture-in-Picture\": \"退出画中画\",\n  \"Mute\": \"静音\",\n  \"Unmute\": \"取消静音\",\n  \"Playback Rate\": \"播放速度\",\n  \"Subtitles\": \"字幕\",\n  \"subtitles off\": \"关闭字幕\",\n  \"Captions\": \"内嵌字幕\",\n  \"captions off\": \"关闭内嵌字幕\",\n  \"Chapters\": \"节目段落\",\n  \"Close Modal Dialog\": \"关闭弹窗\",\n  \"Descriptions\": \"描述\",\n  \"descriptions off\": \"关闭描述\",\n  \"Audio Track\": \"音轨\",\n  \"You aborted the media playback\": \"视频播放被终止\",\n  \"A network error caused the media download to fail part-way.\": \"网络错误导致视频下载中途失败。\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"视频因格式不支持或者服务器或网络的问题无法加载。\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"由于视频文件损坏或是该视频使用了你的浏览器不支持的功能，播放终止。\",\n  \"No compatible source was found for this media.\": \"无法找到此视频兼容的源。\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"视频已加密，无法解密。\",\n  \"Play Video\": \"播放视频\",\n  \"Close\": \"关闭\",\n  \"Modal Window\": \"弹窗\",\n  \"This is a modal window\": \"这是一个弹窗\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"可以按ESC按键或启用关闭按钮来关闭此弹窗。\",\n  \", opens captions settings dialog\": \", 开启标题设置弹窗\",\n  \", opens subtitles settings dialog\": \", 开启字幕设置弹窗\",\n  \", opens descriptions settings dialog\": \", 开启描述设置弹窗\",\n  \", selected\": \", 选择\",\n  \"captions settings\": \"字幕设定\",\n  \"Audio Player\": \"音频播放器\",\n  \"Video Player\": \"视频播放器\",\n  \"Replay\": \"重新播放\",\n  \"Progress Bar\": \"进度条\",\n  \"Volume Level\": \"音量\",\n  \"subtitles settings\": \"字幕设定\",\n  \"descriptions settings\": \"描述设定\",\n  \"Text\": \"文字\",\n  \"White\": \"白\",\n  \"Black\": \"黑\",\n  \"Red\": \"红\",\n  \"Green\": \"绿\",\n  \"Blue\": \"蓝\",\n  \"Yellow\": \"黄\",\n  \"Magenta\": \"紫红\",\n  \"Cyan\": \"青\",\n  \"Background\": \"背景\",\n  \"Window\": \"窗口\",\n  \"Transparent\": \"透明\",\n  \"Semi-Transparent\": \"半透明\",\n  \"Opaque\": \"不透明\",\n  \"Font Size\": \"字体尺寸\",\n  \"Text Edge Style\": \"字体边缘样式\",\n  \"None\": \"无\",\n  \"Raised\": \"浮雕\",\n  \"Depressed\": \"压低\",\n  \"Uniform\": \"均匀\",\n  \"Dropshadow\": \"下阴影\",\n  \"Font Family\": \"字体库\",\n  \"Proportional Sans-Serif\": \"比例无细体\",\n  \"Monospace Sans-Serif\": \"单间隔无细体\",\n  \"Proportional Serif\": \"比例细体\",\n  \"Monospace Serif\": \"单间隔细体\",\n  \"Casual\": \"舒适\",\n  \"Script\": \"手写体\",\n  \"Small Caps\": \"小型大写字体\",\n  \"Reset\": \"重置\",\n  \"restore all settings to the default values\": \"恢复全部设定至预设值\",\n  \"Done\": \"完成\",\n  \"Caption Settings Dialog\": \"字幕设定窗口\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"打开对话窗口。Escape键将取消并关闭对话窗口\",\n  \"End of dialog window.\": \"结束对话窗口\",\n  \"Seek to live, currently behind live\": \"尝试直播，当前为延时播放\",\n  \"Seek to live, currently playing live\": \"尝试直播，当前为实时播放\",\n  \"progress bar timing: currentTime={1} duration={2}\": \"{1}/{2}\",\n  \"{1} is loading.\": \"正在加载 {1}。\"\n});","videojs.addLanguage('zh-Hant', {\n  \"Play\": \"播放\",\n  \"Pause\": \"暫停\",\n  \"Current Time\": \"目前時間\",\n  \"Duration\": \"總共時間\",\n  \"Remaining Time\": \"剩餘時間\",\n  \"Stream Type\": \"串流類型\",\n  \"LIVE\": \"直播\",\n  \"Loaded\": \"載入完畢\",\n  \"Progress\": \"進度\",\n  \"Fullscreen\": \"全螢幕\",\n  \"Non-Fullscreen\": \"退出全螢幕\",\n  \"Mute\": \"靜音\",\n  \"Unmute\": \"取消靜音\",\n  \"Playback Rate\": \" 播放速率\",\n  \"Subtitles\": \"字幕\",\n  \"subtitles off\": \"關閉字幕\",\n  \"Captions\": \"內嵌字幕\",\n  \"captions off\": \"關閉內嵌字幕\",\n  \"Chapters\": \"章節\",\n  \"Close Modal Dialog\": \"關閉對話框\",\n  \"Descriptions\": \"描述\",\n  \"descriptions off\": \"關閉描述\",\n  \"Audio Track\": \"音軌\",\n  \"You aborted the media playback\": \"影片播放已終止\",\n  \"A network error caused the media download to fail part-way.\": \"網路錯誤導致影片下載失敗。\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"因格式不支援、伺服器或網路的問題無法載入媒體。\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"由於影片檔案損毀或是該影片使用了您的瀏覽器不支援的功能，已終止播放媒體。\",\n  \"No compatible source was found for this media.\": \"無法找到相容此媒體的來源。\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"媒體已加密，無法解密。\",\n  \"Play Video\": \"播放影片\",\n  \"Close\": \"關閉\",\n  \"Modal Window\": \"強制回應視窗\",\n  \"This is a modal window\": \"此為強制回應視窗\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"可以按ESC按鍵或關閉按鈕來關閉此視窗。\",\n  \", opens captions settings dialog\": \", 開啟標題設定對話框\",\n  \", opens subtitles settings dialog\": \", 開啟字幕設定對話框\",\n  \", opens descriptions settings dialog\": \", 開啟描述設定對話框\",\n  \", selected\": \", 選擇\",\n  \"captions settings\": \"字幕設定\",\n  \"Audio Player\": \"音訊播放器\",\n  \"Video Player\": \"視訊播放器\",\n  \"Replay\": \"重播\",\n  \"Progress Bar\": \"進度列\",\n  \"Volume Level\": \"音量\",\n  \"subtitles settings\": \"字幕設定\",\n  \"descriptions settings\": \"描述設定\",\n  \"Text\": \"文字\",\n  \"White\": \"白\",\n  \"Black\": \"黑\",\n  \"Red\": \"紅\",\n  \"Green\": \"綠\",\n  \"Blue\": \"藍\",\n  \"Yellow\": \"黃\",\n  \"Magenta\": \"紫紅\",\n  \"Cyan\": \"青\",\n  \"Background\": \"背景\",\n  \"Window\": \"視窗\",\n  \"Transparent\": \"透明\",\n  \"Semi-Transparent\": \"半透明\",\n  \"Opaque\": \"不透明\",\n  \"Font Size\": \"字型尺寸\",\n  \"Text Edge Style\": \"字型邊緣樣式\",\n  \"None\": \"無\",\n  \"Raised\": \"浮雕\",\n  \"Depressed\": \"壓低\",\n  \"Uniform\": \"均勻\",\n  \"Dropshadow\": \"下陰影\",\n  \"Font Family\": \"字型系列\",\n  \"Proportional Sans-Serif\": \"調和間距無襯線字型\",\n  \"Monospace Sans-Serif\": \"等寬無襯線字型\",\n  \"Proportional Serif\": \"調和間距襯線字型\",\n  \"Monospace Serif\": \"等寬襯線字型\",\n  \"Casual\": \"輕便的\",\n  \"Script\": \"手寫體\",\n  \"Small Caps\": \"小型大寫字體\",\n  \"Reset\": \"重置\",\n  \"restore all settings to the default values\": \"恢復全部設定至預設值\",\n  \"Done\": \"完成\",\n  \"Caption Settings Dialog\": \"字幕設定對話框\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"開始對話視窗。離開會取消並關閉視窗\",\n  \"End of dialog window.\": \"結束對話視窗\",\n  \"Seek to live, currently behind live\": \"快轉至直播，目前為稍早畫面\",\n  \"Seek to live, currently playing live\": \"快轉至直播，目前為現場畫面\",\n  \"progress bar timing: currentTime={1} duration={2}\": \"{1}/{2}\",\n  \"{1} is loading.\": \"{1} 正在載入。\"\n});","videojs.addLanguage('zh-TW', {\n  \"Play\": \"播放\",\n  \"Pause\": \"暫停\",\n  \"Current Time\": \"目前時間\",\n  \"Duration\": \"總共時間\",\n  \"Remaining Time\": \"剩餘時間\",\n  \"Stream Type\": \"串流類型\",\n  \"LIVE\": \"直播\",\n  \"Loaded\": \"載入完畢\",\n  \"Progress\": \"進度\",\n  \"Fullscreen\": \"全螢幕\",\n  \"Non-Fullscreen\": \"退出全螢幕\",\n  \"Mute\": \"靜音\",\n  \"Unmute\": \"取消靜音\",\n  \"Playback Rate\": \" 播放速率\",\n  \"Subtitles\": \"字幕\",\n  \"subtitles off\": \"關閉字幕\",\n  \"Captions\": \"內嵌字幕\",\n  \"captions off\": \"關閉內嵌字幕\",\n  \"Chapters\": \"章節\",\n  \"Close Modal Dialog\": \"關閉對話框\",\n  \"Descriptions\": \"描述\",\n  \"descriptions off\": \"關閉描述\",\n  \"Audio Track\": \"音軌\",\n  \"You aborted the media playback\": \"影片播放已終止\",\n  \"A network error caused the media download to fail part-way.\": \"網路錯誤導致影片下載失敗。\",\n  \"The media could not be loaded, either because the server or network failed or because the format is not supported.\": \"因格式不支援、伺服器或網路的問題無法載入媒體。\",\n  \"The media playback was aborted due to a corruption problem or because the media used features your browser did not support.\": \"由於影片檔案損毀或是該影片使用了您的瀏覽器不支援的功能，已終止播放媒體。\",\n  \"No compatible source was found for this media.\": \"無法找到相容此媒體的來源。\",\n  \"The media is encrypted and we do not have the keys to decrypt it.\": \"媒體已加密，無法解密。\",\n  \"Play Video\": \"播放影片\",\n  \"Close\": \"關閉\",\n  \"Modal Window\": \"強制回應視窗\",\n  \"This is a modal window\": \"此為強制回應視窗\",\n  \"This modal can be closed by pressing the Escape key or activating the close button.\": \"可以按ESC按鍵或關閉按鈕來關閉此視窗。\",\n  \", opens captions settings dialog\": \", 開啟標題設定對話框\",\n  \", opens subtitles settings dialog\": \", 開啟字幕設定對話框\",\n  \", opens descriptions settings dialog\": \", 開啟描述設定對話框\",\n  \", selected\": \", 選擇\",\n  \"captions settings\": \"字幕設定\",\n  \"Audio Player\": \"音訊播放器\",\n  \"Video Player\": \"視訊播放器\",\n  \"Replay\": \"重播\",\n  \"Progress Bar\": \"進度列\",\n  \"Volume Level\": \"音量\",\n  \"subtitles settings\": \"字幕設定\",\n  \"descriptions settings\": \"描述設定\",\n  \"Text\": \"文字\",\n  \"White\": \"白\",\n  \"Black\": \"黑\",\n  \"Red\": \"紅\",\n  \"Green\": \"綠\",\n  \"Blue\": \"藍\",\n  \"Yellow\": \"黃\",\n  \"Magenta\": \"紫紅\",\n  \"Cyan\": \"青\",\n  \"Background\": \"背景\",\n  \"Window\": \"視窗\",\n  \"Transparent\": \"透明\",\n  \"Semi-Transparent\": \"半透明\",\n  \"Opaque\": \"不透明\",\n  \"Font Size\": \"字型尺寸\",\n  \"Text Edge Style\": \"字型邊緣樣式\",\n  \"None\": \"無\",\n  \"Raised\": \"浮雕\",\n  \"Depressed\": \"壓低\",\n  \"Uniform\": \"均勻\",\n  \"Dropshadow\": \"下陰影\",\n  \"Font Family\": \"字型系列\",\n  \"Proportional Sans-Serif\": \"調和間距無襯線字型\",\n  \"Monospace Sans-Serif\": \"等寬無襯線字型\",\n  \"Proportional Serif\": \"調和間距襯線字型\",\n  \"Monospace Serif\": \"等寬襯線字型\",\n  \"Casual\": \"輕便的\",\n  \"Script\": \"手寫體\",\n  \"Small Caps\": \"小型大寫字體\",\n  \"Reset\": \"重置\",\n  \"restore all settings to the default values\": \"恢復全部設定至預設值\",\n  \"Done\": \"完成\",\n  \"Caption Settings Dialog\": \"字幕設定對話框\",\n  \"Beginning of dialog window. Escape will cancel and close the window.\": \"開始對話視窗。離開會取消並關閉視窗\",\n  \"End of dialog window.\": \"結束對話視窗\",\n  \"Seek to live, currently behind live\": \"快轉至直播，目前為稍早畫面\",\n  \"Seek to live, currently playing live\": \"快轉至直播，目前為現場畫面\",\n  \"progress bar timing: currentTime={1} duration={2}\": \"{1}/{2}\",\n  \"{1} is loading.\": \"{1} 正在載入。\"\n});","export default function _extends() {\n  _extends = Object.assign || function (target) {\n    for (var i = 1; i < arguments.length; i++) {\n      var source = arguments[i];\n\n      for (var key in source) {\n        if (Object.prototype.hasOwnProperty.call(source, key)) {\n          target[key] = source[key];\n        }\n      }\n    }\n\n    return target;\n  };\n\n  return _extends.apply(this, arguments);\n}","export default function _assertThisInitialized(self) {\n  if (self === void 0) {\n    throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\");\n  }\n\n  return self;\n}","export default function _setPrototypeOf(o, p) {\n  _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {\n    o.__proto__ = p;\n    return o;\n  };\n\n  return _setPrototypeOf(o, p);\n}","import setPrototypeOf from \"./setPrototypeOf.js\";\nexport default function _inheritsLoose(subClass, superClass) {\n  subClass.prototype = Object.create(superClass.prototype);\n  subClass.prototype.constructor = subClass;\n  setPrototypeOf(subClass, superClass);\n}","export default function _isNativeReflectConstruct() {\n  if (typeof Reflect === \"undefined\" || !Reflect.construct) return false;\n  if (Reflect.construct.sham) return false;\n  if (typeof Proxy === \"function\") return true;\n\n  try {\n    Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {}));\n    return true;\n  } catch (e) {\n    return false;\n  }\n}","import setPrototypeOf from \"./setPrototypeOf.js\";\nimport isNativeReflectConstruct from \"./isNativeReflectConstruct.js\";\nexport default function _construct(Parent, args, Class) {\n  if (isNativeReflectConstruct()) {\n    _construct = Reflect.construct;\n  } else {\n    _construct = function _construct(Parent, args, Class) {\n      var a = [null];\n      a.push.apply(a, args);\n      var Constructor = Function.bind.apply(Parent, a);\n      var instance = new Constructor();\n      if (Class) setPrototypeOf(instance, Class.prototype);\n      return instance;\n    };\n  }\n\n  return _construct.apply(null, arguments);\n}","import URLToolkit from 'url-toolkit';\nimport window from 'global/window';\nvar DEFAULT_LOCATION = 'http://example.com';\n\nvar resolveUrl = function resolveUrl(baseUrl, relativeUrl) {\n  // return early if we don't need to resolve\n  if (/^[a-z]+:/i.test(relativeUrl)) {\n    return relativeUrl;\n  } // if baseUrl is a data URI, ignore it and resolve everything relative to window.location\n\n\n  if (/^data:/.test(baseUrl)) {\n    baseUrl = window.location && window.location.href || '';\n  } // IE11 supports URL but not the URL constructor\n  // feature detect the behavior we want\n\n\n  var nativeURL = typeof window.URL === 'function';\n  var protocolLess = /^\\/\\//.test(baseUrl); // remove location if window.location isn't available (i.e. we're in node)\n  // and if baseUrl isn't an absolute url\n\n  var removeLocation = !window.location && !/\\/\\//i.test(baseUrl); // if the base URL is relative then combine with the current location\n\n  if (nativeURL) {\n    baseUrl = new window.URL(baseUrl, window.location || DEFAULT_LOCATION);\n  } else if (!/\\/\\//i.test(baseUrl)) {\n    baseUrl = URLToolkit.buildAbsoluteURL(window.location && window.location.href || '', baseUrl);\n  }\n\n  if (nativeURL) {\n    var newUrl = new URL(relativeUrl, baseUrl); // if we're a protocol-less url, remove the protocol\n    // and if we're location-less, remove the location\n    // otherwise, return the url unmodified\n\n    if (removeLocation) {\n      return newUrl.href.slice(DEFAULT_LOCATION.length);\n    } else if (protocolLess) {\n      return newUrl.href.slice(newUrl.protocol.length);\n    }\n\n    return newUrl.href;\n  }\n\n  return URLToolkit.buildAbsoluteURL(baseUrl, relativeUrl);\n};\n\nexport default resolveUrl;","/**\n * @file stream.js\n */\n\n/**\n * A lightweight readable stream implemention that handles event dispatching.\n *\n * @class Stream\n */\nvar Stream = /*#__PURE__*/function () {\n  function Stream() {\n    this.listeners = {};\n  }\n  /**\n   * Add a listener for a specified event type.\n   *\n   * @param {string} type the event name\n   * @param {Function} listener the callback to be invoked when an event of\n   * the specified type occurs\n   */\n\n\n  var _proto = Stream.prototype;\n\n  _proto.on = function on(type, listener) {\n    if (!this.listeners[type]) {\n      this.listeners[type] = [];\n    }\n\n    this.listeners[type].push(listener);\n  }\n  /**\n   * Remove a listener for a specified event type.\n   *\n   * @param {string} type the event name\n   * @param {Function} listener  a function previously registered for this\n   * type of event through `on`\n   * @return {boolean} if we could turn it off or not\n   */\n  ;\n\n  _proto.off = function off(type, listener) {\n    if (!this.listeners[type]) {\n      return false;\n    }\n\n    var index = this.listeners[type].indexOf(listener); // TODO: which is better?\n    // In Video.js we slice listener functions\n    // on trigger so that it does not mess up the order\n    // while we loop through.\n    //\n    // Here we slice on off so that the loop in trigger\n    // can continue using it's old reference to loop without\n    // messing up the order.\n\n    this.listeners[type] = this.listeners[type].slice(0);\n    this.listeners[type].splice(index, 1);\n    return index > -1;\n  }\n  /**\n   * Trigger an event of the specified type on this stream. Any additional\n   * arguments to this function are passed as parameters to event listeners.\n   *\n   * @param {string} type the event name\n   */\n  ;\n\n  _proto.trigger = function trigger(type) {\n    var callbacks = this.listeners[type];\n\n    if (!callbacks) {\n      return;\n    } // Slicing the arguments on every invocation of this method\n    // can add a significant amount of overhead. Avoid the\n    // intermediate object creation for the common case of a\n    // single callback argument\n\n\n    if (arguments.length === 2) {\n      var length = callbacks.length;\n\n      for (var i = 0; i < length; ++i) {\n        callbacks[i].call(this, arguments[1]);\n      }\n    } else {\n      var args = Array.prototype.slice.call(arguments, 1);\n      var _length = callbacks.length;\n\n      for (var _i = 0; _i < _length; ++_i) {\n        callbacks[_i].apply(this, args);\n      }\n    }\n  }\n  /**\n   * Destroys the stream and cleans up.\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    this.listeners = {};\n  }\n  /**\n   * Forwards all `data` events on this stream to the destination stream. The\n   * destination stream should provide a method `push` to receive the data\n   * events as they arrive.\n   *\n   * @param {Stream} destination the stream that will receive all `data` events\n   * @see http://nodejs.org/api/stream.html#stream_readable_pipe_destination_options\n   */\n  ;\n\n  _proto.pipe = function pipe(destination) {\n    this.on('data', function (data) {\n      destination.push(data);\n    });\n  };\n\n  return Stream;\n}();\n\nexport { Stream as default };","import window from 'global/window';\n\nvar atob = function atob(s) {\n  return window.atob ? window.atob(s) : Buffer.from(s, 'base64').toString('binary');\n};\n\nexport default function decodeB64ToUint8Array(b64Text) {\n  var decodedString = atob(b64Text);\n  var array = new Uint8Array(decodedString.length);\n\n  for (var i = 0; i < decodedString.length; i++) {\n    array[i] = decodedString.charCodeAt(i);\n  }\n\n  return array;\n}","/*! @name m3u8-parser @version 4.7.0 @license Apache-2.0 */\nimport _inheritsLoose from '@babel/runtime/helpers/inheritsLoose';\nimport Stream from '@videojs/vhs-utils/es/stream.js';\nimport _extends from '@babel/runtime/helpers/extends';\nimport _assertThisInitialized from '@babel/runtime/helpers/assertThisInitialized';\nimport decodeB64ToUint8Array from '@videojs/vhs-utils/es/decode-b64-to-uint8-array.js';\n\n/**\n * A stream that buffers string input and generates a `data` event for each\n * line.\n *\n * @class LineStream\n * @extends Stream\n */\n\nvar LineStream = /*#__PURE__*/function (_Stream) {\n  _inheritsLoose(LineStream, _Stream);\n\n  function LineStream() {\n    var _this;\n\n    _this = _Stream.call(this) || this;\n    _this.buffer = '';\n    return _this;\n  }\n  /**\n   * Add new data to be parsed.\n   *\n   * @param {string} data the text to process\n   */\n\n\n  var _proto = LineStream.prototype;\n\n  _proto.push = function push(data) {\n    var nextNewline;\n    this.buffer += data;\n    nextNewline = this.buffer.indexOf('\\n');\n\n    for (; nextNewline > -1; nextNewline = this.buffer.indexOf('\\n')) {\n      this.trigger('data', this.buffer.substring(0, nextNewline));\n      this.buffer = this.buffer.substring(nextNewline + 1);\n    }\n  };\n\n  return LineStream;\n}(Stream);\n\nvar TAB = String.fromCharCode(0x09);\n\nvar parseByterange = function parseByterange(byterangeString) {\n  // optionally match and capture 0+ digits before `@`\n  // optionally match and capture 0+ digits after `@`\n  var match = /([0-9.]*)?@?([0-9.]*)?/.exec(byterangeString || '');\n  var result = {};\n\n  if (match[1]) {\n    result.length = parseInt(match[1], 10);\n  }\n\n  if (match[2]) {\n    result.offset = parseInt(match[2], 10);\n  }\n\n  return result;\n};\n/**\n * \"forgiving\" attribute list psuedo-grammar:\n * attributes -> keyvalue (',' keyvalue)*\n * keyvalue   -> key '=' value\n * key        -> [^=]*\n * value      -> '\"' [^\"]* '\"' | [^,]*\n */\n\n\nvar attributeSeparator = function attributeSeparator() {\n  var key = '[^=]*';\n  var value = '\"[^\"]*\"|[^,]*';\n  var keyvalue = '(?:' + key + ')=(?:' + value + ')';\n  return new RegExp('(?:^|,)(' + keyvalue + ')');\n};\n/**\n * Parse attributes from a line given the separator\n *\n * @param {string} attributes the attribute line to parse\n */\n\n\nvar parseAttributes = function parseAttributes(attributes) {\n  // split the string using attributes as the separator\n  var attrs = attributes.split(attributeSeparator());\n  var result = {};\n  var i = attrs.length;\n  var attr;\n\n  while (i--) {\n    // filter out unmatched portions of the string\n    if (attrs[i] === '') {\n      continue;\n    } // split the key and value\n\n\n    attr = /([^=]*)=(.*)/.exec(attrs[i]).slice(1); // trim whitespace and remove optional quotes around the value\n\n    attr[0] = attr[0].replace(/^\\s+|\\s+$/g, '');\n    attr[1] = attr[1].replace(/^\\s+|\\s+$/g, '');\n    attr[1] = attr[1].replace(/^['\"](.*)['\"]$/g, '$1');\n    result[attr[0]] = attr[1];\n  }\n\n  return result;\n};\n/**\n * A line-level M3U8 parser event stream. It expects to receive input one\n * line at a time and performs a context-free parse of its contents. A stream\n * interpretation of a manifest can be useful if the manifest is expected to\n * be too large to fit comfortably into memory or the entirety of the input\n * is not immediately available. Otherwise, it's probably much easier to work\n * with a regular `Parser` object.\n *\n * Produces `data` events with an object that captures the parser's\n * interpretation of the input. That object has a property `tag` that is one\n * of `uri`, `comment`, or `tag`. URIs only have a single additional\n * property, `line`, which captures the entirety of the input without\n * interpretation. Comments similarly have a single additional property\n * `text` which is the input without the leading `#`.\n *\n * Tags always have a property `tagType` which is the lower-cased version of\n * the M3U8 directive without the `#EXT` or `#EXT-X-` prefix. For instance,\n * `#EXT-X-MEDIA-SEQUENCE` becomes `media-sequence` when parsed. Unrecognized\n * tags are given the tag type `unknown` and a single additional property\n * `data` with the remainder of the input.\n *\n * @class ParseStream\n * @extends Stream\n */\n\n\nvar ParseStream = /*#__PURE__*/function (_Stream) {\n  _inheritsLoose(ParseStream, _Stream);\n\n  function ParseStream() {\n    var _this;\n\n    _this = _Stream.call(this) || this;\n    _this.customParsers = [];\n    _this.tagMappers = [];\n    return _this;\n  }\n  /**\n   * Parses an additional line of input.\n   *\n   * @param {string} line a single line of an M3U8 file to parse\n   */\n\n\n  var _proto = ParseStream.prototype;\n\n  _proto.push = function push(line) {\n    var _this2 = this;\n\n    var match;\n    var event; // strip whitespace\n\n    line = line.trim();\n\n    if (line.length === 0) {\n      // ignore empty lines\n      return;\n    } // URIs\n\n\n    if (line[0] !== '#') {\n      this.trigger('data', {\n        type: 'uri',\n        uri: line\n      });\n      return;\n    } // map tags\n\n\n    var newLines = this.tagMappers.reduce(function (acc, mapper) {\n      var mappedLine = mapper(line); // skip if unchanged\n\n      if (mappedLine === line) {\n        return acc;\n      }\n\n      return acc.concat([mappedLine]);\n    }, [line]);\n    newLines.forEach(function (newLine) {\n      for (var i = 0; i < _this2.customParsers.length; i++) {\n        if (_this2.customParsers[i].call(_this2, newLine)) {\n          return;\n        }\n      } // Comments\n\n\n      if (newLine.indexOf('#EXT') !== 0) {\n        _this2.trigger('data', {\n          type: 'comment',\n          text: newLine.slice(1)\n        });\n\n        return;\n      } // strip off any carriage returns here so the regex matching\n      // doesn't have to account for them.\n\n\n      newLine = newLine.replace('\\r', ''); // Tags\n\n      match = /^#EXTM3U/.exec(newLine);\n\n      if (match) {\n        _this2.trigger('data', {\n          type: 'tag',\n          tagType: 'm3u'\n        });\n\n        return;\n      }\n\n      match = /^#EXTINF:?([0-9\\.]*)?,?(.*)?$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'inf'\n        };\n\n        if (match[1]) {\n          event.duration = parseFloat(match[1]);\n        }\n\n        if (match[2]) {\n          event.title = match[2];\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-TARGETDURATION:?([0-9.]*)?/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'targetduration'\n        };\n\n        if (match[1]) {\n          event.duration = parseInt(match[1], 10);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-VERSION:?([0-9.]*)?/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'version'\n        };\n\n        if (match[1]) {\n          event.version = parseInt(match[1], 10);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-MEDIA-SEQUENCE:?(\\-?[0-9.]*)?/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'media-sequence'\n        };\n\n        if (match[1]) {\n          event.number = parseInt(match[1], 10);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-DISCONTINUITY-SEQUENCE:?(\\-?[0-9.]*)?/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'discontinuity-sequence'\n        };\n\n        if (match[1]) {\n          event.number = parseInt(match[1], 10);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-PLAYLIST-TYPE:?(.*)?$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'playlist-type'\n        };\n\n        if (match[1]) {\n          event.playlistType = match[1];\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-BYTERANGE:?(.*)?$/.exec(newLine);\n\n      if (match) {\n        event = _extends(parseByterange(match[1]), {\n          type: 'tag',\n          tagType: 'byterange'\n        });\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-ALLOW-CACHE:?(YES|NO)?/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'allow-cache'\n        };\n\n        if (match[1]) {\n          event.allowed = !/NO/.test(match[1]);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-MAP:?(.*)$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'map'\n        };\n\n        if (match[1]) {\n          var attributes = parseAttributes(match[1]);\n\n          if (attributes.URI) {\n            event.uri = attributes.URI;\n          }\n\n          if (attributes.BYTERANGE) {\n            event.byterange = parseByterange(attributes.BYTERANGE);\n          }\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-STREAM-INF:?(.*)$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'stream-inf'\n        };\n\n        if (match[1]) {\n          event.attributes = parseAttributes(match[1]);\n\n          if (event.attributes.RESOLUTION) {\n            var split = event.attributes.RESOLUTION.split('x');\n            var resolution = {};\n\n            if (split[0]) {\n              resolution.width = parseInt(split[0], 10);\n            }\n\n            if (split[1]) {\n              resolution.height = parseInt(split[1], 10);\n            }\n\n            event.attributes.RESOLUTION = resolution;\n          }\n\n          if (event.attributes.BANDWIDTH) {\n            event.attributes.BANDWIDTH = parseInt(event.attributes.BANDWIDTH, 10);\n          }\n\n          if (event.attributes['PROGRAM-ID']) {\n            event.attributes['PROGRAM-ID'] = parseInt(event.attributes['PROGRAM-ID'], 10);\n          }\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-MEDIA:?(.*)$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'media'\n        };\n\n        if (match[1]) {\n          event.attributes = parseAttributes(match[1]);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-ENDLIST/.exec(newLine);\n\n      if (match) {\n        _this2.trigger('data', {\n          type: 'tag',\n          tagType: 'endlist'\n        });\n\n        return;\n      }\n\n      match = /^#EXT-X-DISCONTINUITY/.exec(newLine);\n\n      if (match) {\n        _this2.trigger('data', {\n          type: 'tag',\n          tagType: 'discontinuity'\n        });\n\n        return;\n      }\n\n      match = /^#EXT-X-PROGRAM-DATE-TIME:?(.*)$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'program-date-time'\n        };\n\n        if (match[1]) {\n          event.dateTimeString = match[1];\n          event.dateTimeObject = new Date(match[1]);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-KEY:?(.*)$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'key'\n        };\n\n        if (match[1]) {\n          event.attributes = parseAttributes(match[1]); // parse the IV string into a Uint32Array\n\n          if (event.attributes.IV) {\n            if (event.attributes.IV.substring(0, 2).toLowerCase() === '0x') {\n              event.attributes.IV = event.attributes.IV.substring(2);\n            }\n\n            event.attributes.IV = event.attributes.IV.match(/.{8}/g);\n            event.attributes.IV[0] = parseInt(event.attributes.IV[0], 16);\n            event.attributes.IV[1] = parseInt(event.attributes.IV[1], 16);\n            event.attributes.IV[2] = parseInt(event.attributes.IV[2], 16);\n            event.attributes.IV[3] = parseInt(event.attributes.IV[3], 16);\n            event.attributes.IV = new Uint32Array(event.attributes.IV);\n          }\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-START:?(.*)$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'start'\n        };\n\n        if (match[1]) {\n          event.attributes = parseAttributes(match[1]);\n          event.attributes['TIME-OFFSET'] = parseFloat(event.attributes['TIME-OFFSET']);\n          event.attributes.PRECISE = /YES/.test(event.attributes.PRECISE);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-CUE-OUT-CONT:?(.*)?$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'cue-out-cont'\n        };\n\n        if (match[1]) {\n          event.data = match[1];\n        } else {\n          event.data = '';\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-CUE-OUT:?(.*)?$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'cue-out'\n        };\n\n        if (match[1]) {\n          event.data = match[1];\n        } else {\n          event.data = '';\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-CUE-IN:?(.*)?$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'cue-in'\n        };\n\n        if (match[1]) {\n          event.data = match[1];\n        } else {\n          event.data = '';\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-SKIP:(.*)$/.exec(newLine);\n\n      if (match && match[1]) {\n        event = {\n          type: 'tag',\n          tagType: 'skip'\n        };\n        event.attributes = parseAttributes(match[1]);\n\n        if (event.attributes.hasOwnProperty('SKIPPED-SEGMENTS')) {\n          event.attributes['SKIPPED-SEGMENTS'] = parseInt(event.attributes['SKIPPED-SEGMENTS'], 10);\n        }\n\n        if (event.attributes.hasOwnProperty('RECENTLY-REMOVED-DATERANGES')) {\n          event.attributes['RECENTLY-REMOVED-DATERANGES'] = event.attributes['RECENTLY-REMOVED-DATERANGES'].split(TAB);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-PART:(.*)$/.exec(newLine);\n\n      if (match && match[1]) {\n        event = {\n          type: 'tag',\n          tagType: 'part'\n        };\n        event.attributes = parseAttributes(match[1]);\n        ['DURATION'].forEach(function (key) {\n          if (event.attributes.hasOwnProperty(key)) {\n            event.attributes[key] = parseFloat(event.attributes[key]);\n          }\n        });\n        ['INDEPENDENT', 'GAP'].forEach(function (key) {\n          if (event.attributes.hasOwnProperty(key)) {\n            event.attributes[key] = /YES/.test(event.attributes[key]);\n          }\n        });\n\n        if (event.attributes.hasOwnProperty('BYTERANGE')) {\n          event.attributes.byterange = parseByterange(event.attributes.BYTERANGE);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-SERVER-CONTROL:(.*)$/.exec(newLine);\n\n      if (match && match[1]) {\n        event = {\n          type: 'tag',\n          tagType: 'server-control'\n        };\n        event.attributes = parseAttributes(match[1]);\n        ['CAN-SKIP-UNTIL', 'PART-HOLD-BACK', 'HOLD-BACK'].forEach(function (key) {\n          if (event.attributes.hasOwnProperty(key)) {\n            event.attributes[key] = parseFloat(event.attributes[key]);\n          }\n        });\n        ['CAN-SKIP-DATERANGES', 'CAN-BLOCK-RELOAD'].forEach(function (key) {\n          if (event.attributes.hasOwnProperty(key)) {\n            event.attributes[key] = /YES/.test(event.attributes[key]);\n          }\n        });\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-PART-INF:(.*)$/.exec(newLine);\n\n      if (match && match[1]) {\n        event = {\n          type: 'tag',\n          tagType: 'part-inf'\n        };\n        event.attributes = parseAttributes(match[1]);\n        ['PART-TARGET'].forEach(function (key) {\n          if (event.attributes.hasOwnProperty(key)) {\n            event.attributes[key] = parseFloat(event.attributes[key]);\n          }\n        });\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-PRELOAD-HINT:(.*)$/.exec(newLine);\n\n      if (match && match[1]) {\n        event = {\n          type: 'tag',\n          tagType: 'preload-hint'\n        };\n        event.attributes = parseAttributes(match[1]);\n        ['BYTERANGE-START', 'BYTERANGE-LENGTH'].forEach(function (key) {\n          if (event.attributes.hasOwnProperty(key)) {\n            event.attributes[key] = parseInt(event.attributes[key], 10);\n            var subkey = key === 'BYTERANGE-LENGTH' ? 'length' : 'offset';\n            event.attributes.byterange = event.attributes.byterange || {};\n            event.attributes.byterange[subkey] = event.attributes[key]; // only keep the parsed byterange object.\n\n            delete event.attributes[key];\n          }\n        });\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-RENDITION-REPORT:(.*)$/.exec(newLine);\n\n      if (match && match[1]) {\n        event = {\n          type: 'tag',\n          tagType: 'rendition-report'\n        };\n        event.attributes = parseAttributes(match[1]);\n        ['LAST-MSN', 'LAST-PART'].forEach(function (key) {\n          if (event.attributes.hasOwnProperty(key)) {\n            event.attributes[key] = parseInt(event.attributes[key], 10);\n          }\n        });\n\n        _this2.trigger('data', event);\n\n        return;\n      } // unknown tag type\n\n\n      _this2.trigger('data', {\n        type: 'tag',\n        data: newLine.slice(4)\n      });\n    });\n  }\n  /**\n   * Add a parser for custom headers\n   *\n   * @param {Object}   options              a map of options for the added parser\n   * @param {RegExp}   options.expression   a regular expression to match the custom header\n   * @param {string}   options.customType   the custom type to register to the output\n   * @param {Function} [options.dataParser] function to parse the line into an object\n   * @param {boolean}  [options.segment]    should tag data be attached to the segment object\n   */\n  ;\n\n  _proto.addParser = function addParser(_ref) {\n    var _this3 = this;\n\n    var expression = _ref.expression,\n        customType = _ref.customType,\n        dataParser = _ref.dataParser,\n        segment = _ref.segment;\n\n    if (typeof dataParser !== 'function') {\n      dataParser = function dataParser(line) {\n        return line;\n      };\n    }\n\n    this.customParsers.push(function (line) {\n      var match = expression.exec(line);\n\n      if (match) {\n        _this3.trigger('data', {\n          type: 'custom',\n          data: dataParser(line),\n          customType: customType,\n          segment: segment\n        });\n\n        return true;\n      }\n    });\n  }\n  /**\n   * Add a custom header mapper\n   *\n   * @param {Object}   options\n   * @param {RegExp}   options.expression   a regular expression to match the custom header\n   * @param {Function} options.map          function to translate tag into a different tag\n   */\n  ;\n\n  _proto.addTagMapper = function addTagMapper(_ref2) {\n    var expression = _ref2.expression,\n        map = _ref2.map;\n\n    var mapFn = function mapFn(line) {\n      if (expression.test(line)) {\n        return map(line);\n      }\n\n      return line;\n    };\n\n    this.tagMappers.push(mapFn);\n  };\n\n  return ParseStream;\n}(Stream);\n\nvar camelCase = function camelCase(str) {\n  return str.toLowerCase().replace(/-(\\w)/g, function (a) {\n    return a[1].toUpperCase();\n  });\n};\n\nvar camelCaseKeys = function camelCaseKeys(attributes) {\n  var result = {};\n  Object.keys(attributes).forEach(function (key) {\n    result[camelCase(key)] = attributes[key];\n  });\n  return result;\n}; // set SERVER-CONTROL hold back based upon targetDuration and partTargetDuration\n// we need this helper because defaults are based upon targetDuration and\n// partTargetDuration being set, but they may not be if SERVER-CONTROL appears before\n// target durations are set.\n\n\nvar setHoldBack = function setHoldBack(manifest) {\n  var serverControl = manifest.serverControl,\n      targetDuration = manifest.targetDuration,\n      partTargetDuration = manifest.partTargetDuration;\n\n  if (!serverControl) {\n    return;\n  }\n\n  var tag = '#EXT-X-SERVER-CONTROL';\n  var hb = 'holdBack';\n  var phb = 'partHoldBack';\n  var minTargetDuration = targetDuration && targetDuration * 3;\n  var minPartDuration = partTargetDuration && partTargetDuration * 2;\n\n  if (targetDuration && !serverControl.hasOwnProperty(hb)) {\n    serverControl[hb] = minTargetDuration;\n    this.trigger('info', {\n      message: tag + \" defaulting HOLD-BACK to targetDuration * 3 (\" + minTargetDuration + \").\"\n    });\n  }\n\n  if (minTargetDuration && serverControl[hb] < minTargetDuration) {\n    this.trigger('warn', {\n      message: tag + \" clamping HOLD-BACK (\" + serverControl[hb] + \") to targetDuration * 3 (\" + minTargetDuration + \")\"\n    });\n    serverControl[hb] = minTargetDuration;\n  } // default no part hold back to part target duration * 3\n\n\n  if (partTargetDuration && !serverControl.hasOwnProperty(phb)) {\n    serverControl[phb] = partTargetDuration * 3;\n    this.trigger('info', {\n      message: tag + \" defaulting PART-HOLD-BACK to partTargetDuration * 3 (\" + serverControl[phb] + \").\"\n    });\n  } // if part hold back is too small default it to part target duration * 2\n\n\n  if (partTargetDuration && serverControl[phb] < minPartDuration) {\n    this.trigger('warn', {\n      message: tag + \" clamping PART-HOLD-BACK (\" + serverControl[phb] + \") to partTargetDuration * 2 (\" + minPartDuration + \").\"\n    });\n    serverControl[phb] = minPartDuration;\n  }\n};\n/**\n * A parser for M3U8 files. The current interpretation of the input is\n * exposed as a property `manifest` on parser objects. It's just two lines to\n * create and parse a manifest once you have the contents available as a string:\n *\n * ```js\n * var parser = new m3u8.Parser();\n * parser.push(xhr.responseText);\n * ```\n *\n * New input can later be applied to update the manifest object by calling\n * `push` again.\n *\n * The parser attempts to create a usable manifest object even if the\n * underlying input is somewhat nonsensical. It emits `info` and `warning`\n * events during the parse if it encounters input that seems invalid or\n * requires some property of the manifest object to be defaulted.\n *\n * @class Parser\n * @extends Stream\n */\n\n\nvar Parser = /*#__PURE__*/function (_Stream) {\n  _inheritsLoose(Parser, _Stream);\n\n  function Parser() {\n    var _this;\n\n    _this = _Stream.call(this) || this;\n    _this.lineStream = new LineStream();\n    _this.parseStream = new ParseStream();\n\n    _this.lineStream.pipe(_this.parseStream);\n    /* eslint-disable consistent-this */\n\n\n    var self = _assertThisInitialized(_this);\n    /* eslint-enable consistent-this */\n\n\n    var uris = [];\n    var currentUri = {}; // if specified, the active EXT-X-MAP definition\n\n    var currentMap; // if specified, the active decryption key\n\n    var _key;\n\n    var hasParts = false;\n\n    var noop = function noop() {};\n\n    var defaultMediaGroups = {\n      'AUDIO': {},\n      'VIDEO': {},\n      'CLOSED-CAPTIONS': {},\n      'SUBTITLES': {}\n    }; // This is the Widevine UUID from DASH IF IOP. The same exact string is\n    // used in MPDs with Widevine encrypted streams.\n\n    var widevineUuid = 'urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed'; // group segments into numbered timelines delineated by discontinuities\n\n    var currentTimeline = 0; // the manifest is empty until the parse stream begins delivering data\n\n    _this.manifest = {\n      allowCache: true,\n      discontinuityStarts: [],\n      segments: []\n    }; // keep track of the last seen segment's byte range end, as segments are not required\n    // to provide the offset, in which case it defaults to the next byte after the\n    // previous segment\n\n    var lastByterangeEnd = 0; // keep track of the last seen part's byte range end.\n\n    var lastPartByterangeEnd = 0;\n\n    _this.on('end', function () {\n      // only add preloadSegment if we don't yet have a uri for it.\n      // and we actually have parts/preloadHints\n      if (currentUri.uri || !currentUri.parts && !currentUri.preloadHints) {\n        return;\n      }\n\n      if (!currentUri.map && currentMap) {\n        currentUri.map = currentMap;\n      }\n\n      if (!currentUri.key && _key) {\n        currentUri.key = _key;\n      }\n\n      if (!currentUri.timeline && typeof currentTimeline === 'number') {\n        currentUri.timeline = currentTimeline;\n      }\n\n      _this.manifest.preloadSegment = currentUri;\n    }); // update the manifest with the m3u8 entry from the parse stream\n\n\n    _this.parseStream.on('data', function (entry) {\n      var mediaGroup;\n      var rendition;\n      ({\n        tag: function tag() {\n          // switch based on the tag type\n          (({\n            version: function version() {\n              if (entry.version) {\n                this.manifest.version = entry.version;\n              }\n            },\n            'allow-cache': function allowCache() {\n              this.manifest.allowCache = entry.allowed;\n\n              if (!('allowed' in entry)) {\n                this.trigger('info', {\n                  message: 'defaulting allowCache to YES'\n                });\n                this.manifest.allowCache = true;\n              }\n            },\n            byterange: function byterange() {\n              var byterange = {};\n\n              if ('length' in entry) {\n                currentUri.byterange = byterange;\n                byterange.length = entry.length;\n\n                if (!('offset' in entry)) {\n                  /*\n                   * From the latest spec (as of this writing):\n                   * https://tools.ietf.org/html/draft-pantos-http-live-streaming-23#section-4.3.2.2\n                   *\n                   * Same text since EXT-X-BYTERANGE's introduction in draft 7:\n                   * https://tools.ietf.org/html/draft-pantos-http-live-streaming-07#section-3.3.1)\n                   *\n                   * \"If o [offset] is not present, the sub-range begins at the next byte\n                   * following the sub-range of the previous media segment.\"\n                   */\n                  entry.offset = lastByterangeEnd;\n                }\n              }\n\n              if ('offset' in entry) {\n                currentUri.byterange = byterange;\n                byterange.offset = entry.offset;\n              }\n\n              lastByterangeEnd = byterange.offset + byterange.length;\n            },\n            endlist: function endlist() {\n              this.manifest.endList = true;\n            },\n            inf: function inf() {\n              if (!('mediaSequence' in this.manifest)) {\n                this.manifest.mediaSequence = 0;\n                this.trigger('info', {\n                  message: 'defaulting media sequence to zero'\n                });\n              }\n\n              if (!('discontinuitySequence' in this.manifest)) {\n                this.manifest.discontinuitySequence = 0;\n                this.trigger('info', {\n                  message: 'defaulting discontinuity sequence to zero'\n                });\n              }\n\n              if (entry.duration > 0) {\n                currentUri.duration = entry.duration;\n              }\n\n              if (entry.duration === 0) {\n                currentUri.duration = 0.01;\n                this.trigger('info', {\n                  message: 'updating zero segment duration to a small value'\n                });\n              }\n\n              this.manifest.segments = uris;\n            },\n            key: function key() {\n              if (!entry.attributes) {\n                this.trigger('warn', {\n                  message: 'ignoring key declaration without attribute list'\n                });\n                return;\n              } // clear the active encryption key\n\n\n              if (entry.attributes.METHOD === 'NONE') {\n                _key = null;\n                return;\n              }\n\n              if (!entry.attributes.URI) {\n                this.trigger('warn', {\n                  message: 'ignoring key declaration without URI'\n                });\n                return;\n              }\n\n              if (entry.attributes.KEYFORMAT === 'com.apple.streamingkeydelivery') {\n                this.manifest.contentProtection = this.manifest.contentProtection || {}; // TODO: add full support for this.\n\n                this.manifest.contentProtection['com.apple.fps.1_0'] = {\n                  attributes: entry.attributes\n                };\n                return;\n              } // check if the content is encrypted for Widevine\n              // Widevine/HLS spec: https://storage.googleapis.com/wvdocs/Widevine_DRM_HLS.pdf\n\n\n              if (entry.attributes.KEYFORMAT === widevineUuid) {\n                var VALID_METHODS = ['SAMPLE-AES', 'SAMPLE-AES-CTR', 'SAMPLE-AES-CENC'];\n\n                if (VALID_METHODS.indexOf(entry.attributes.METHOD) === -1) {\n                  this.trigger('warn', {\n                    message: 'invalid key method provided for Widevine'\n                  });\n                  return;\n                }\n\n                if (entry.attributes.METHOD === 'SAMPLE-AES-CENC') {\n                  this.trigger('warn', {\n                    message: 'SAMPLE-AES-CENC is deprecated, please use SAMPLE-AES-CTR instead'\n                  });\n                }\n\n                if (entry.attributes.URI.substring(0, 23) !== 'data:text/plain;base64,') {\n                  this.trigger('warn', {\n                    message: 'invalid key URI provided for Widevine'\n                  });\n                  return;\n                }\n\n                if (!(entry.attributes.KEYID && entry.attributes.KEYID.substring(0, 2) === '0x')) {\n                  this.trigger('warn', {\n                    message: 'invalid key ID provided for Widevine'\n                  });\n                  return;\n                } // if Widevine key attributes are valid, store them as `contentProtection`\n                // on the manifest to emulate Widevine tag structure in a DASH mpd\n\n\n                this.manifest.contentProtection = this.manifest.contentProtection || {};\n                this.manifest.contentProtection['com.widevine.alpha'] = {\n                  attributes: {\n                    schemeIdUri: entry.attributes.KEYFORMAT,\n                    // remove '0x' from the key id string\n                    keyId: entry.attributes.KEYID.substring(2)\n                  },\n                  // decode the base64-encoded PSSH box\n                  pssh: decodeB64ToUint8Array(entry.attributes.URI.split(',')[1])\n                };\n                return;\n              }\n\n              if (!entry.attributes.METHOD) {\n                this.trigger('warn', {\n                  message: 'defaulting key method to AES-128'\n                });\n              } // setup an encryption key for upcoming segments\n\n\n              _key = {\n                method: entry.attributes.METHOD || 'AES-128',\n                uri: entry.attributes.URI\n              };\n\n              if (typeof entry.attributes.IV !== 'undefined') {\n                _key.iv = entry.attributes.IV;\n              }\n            },\n            'media-sequence': function mediaSequence() {\n              if (!isFinite(entry.number)) {\n                this.trigger('warn', {\n                  message: 'ignoring invalid media sequence: ' + entry.number\n                });\n                return;\n              }\n\n              this.manifest.mediaSequence = entry.number;\n            },\n            'discontinuity-sequence': function discontinuitySequence() {\n              if (!isFinite(entry.number)) {\n                this.trigger('warn', {\n                  message: 'ignoring invalid discontinuity sequence: ' + entry.number\n                });\n                return;\n              }\n\n              this.manifest.discontinuitySequence = entry.number;\n              currentTimeline = entry.number;\n            },\n            'playlist-type': function playlistType() {\n              if (!/VOD|EVENT/.test(entry.playlistType)) {\n                this.trigger('warn', {\n                  message: 'ignoring unknown playlist type: ' + entry.playlist\n                });\n                return;\n              }\n\n              this.manifest.playlistType = entry.playlistType;\n            },\n            map: function map() {\n              currentMap = {};\n\n              if (entry.uri) {\n                currentMap.uri = entry.uri;\n              }\n\n              if (entry.byterange) {\n                currentMap.byterange = entry.byterange;\n              }\n\n              if (_key) {\n                currentMap.key = _key;\n              }\n            },\n            'stream-inf': function streamInf() {\n              this.manifest.playlists = uris;\n              this.manifest.mediaGroups = this.manifest.mediaGroups || defaultMediaGroups;\n\n              if (!entry.attributes) {\n                this.trigger('warn', {\n                  message: 'ignoring empty stream-inf attributes'\n                });\n                return;\n              }\n\n              if (!currentUri.attributes) {\n                currentUri.attributes = {};\n              }\n\n              _extends(currentUri.attributes, entry.attributes);\n            },\n            media: function media() {\n              this.manifest.mediaGroups = this.manifest.mediaGroups || defaultMediaGroups;\n\n              if (!(entry.attributes && entry.attributes.TYPE && entry.attributes['GROUP-ID'] && entry.attributes.NAME)) {\n                this.trigger('warn', {\n                  message: 'ignoring incomplete or missing media group'\n                });\n                return;\n              } // find the media group, creating defaults as necessary\n\n\n              var mediaGroupType = this.manifest.mediaGroups[entry.attributes.TYPE];\n              mediaGroupType[entry.attributes['GROUP-ID']] = mediaGroupType[entry.attributes['GROUP-ID']] || {};\n              mediaGroup = mediaGroupType[entry.attributes['GROUP-ID']]; // collect the rendition metadata\n\n              rendition = {\n                default: /yes/i.test(entry.attributes.DEFAULT)\n              };\n\n              if (rendition.default) {\n                rendition.autoselect = true;\n              } else {\n                rendition.autoselect = /yes/i.test(entry.attributes.AUTOSELECT);\n              }\n\n              if (entry.attributes.LANGUAGE) {\n                rendition.language = entry.attributes.LANGUAGE;\n              }\n\n              if (entry.attributes.URI) {\n                rendition.uri = entry.attributes.URI;\n              }\n\n              if (entry.attributes['INSTREAM-ID']) {\n                rendition.instreamId = entry.attributes['INSTREAM-ID'];\n              }\n\n              if (entry.attributes.CHARACTERISTICS) {\n                rendition.characteristics = entry.attributes.CHARACTERISTICS;\n              }\n\n              if (entry.attributes.FORCED) {\n                rendition.forced = /yes/i.test(entry.attributes.FORCED);\n              } // insert the new rendition\n\n\n              mediaGroup[entry.attributes.NAME] = rendition;\n            },\n            discontinuity: function discontinuity() {\n              currentTimeline += 1;\n              currentUri.discontinuity = true;\n              this.manifest.discontinuityStarts.push(uris.length);\n            },\n            'program-date-time': function programDateTime() {\n              if (typeof this.manifest.dateTimeString === 'undefined') {\n                // PROGRAM-DATE-TIME is a media-segment tag, but for backwards\n                // compatibility, we add the first occurence of the PROGRAM-DATE-TIME tag\n                // to the manifest object\n                // TODO: Consider removing this in future major version\n                this.manifest.dateTimeString = entry.dateTimeString;\n                this.manifest.dateTimeObject = entry.dateTimeObject;\n              }\n\n              currentUri.dateTimeString = entry.dateTimeString;\n              currentUri.dateTimeObject = entry.dateTimeObject;\n            },\n            targetduration: function targetduration() {\n              if (!isFinite(entry.duration) || entry.duration < 0) {\n                this.trigger('warn', {\n                  message: 'ignoring invalid target duration: ' + entry.duration\n                });\n                return;\n              }\n\n              this.manifest.targetDuration = entry.duration;\n              setHoldBack.call(this, this.manifest);\n            },\n            start: function start() {\n              if (!entry.attributes || isNaN(entry.attributes['TIME-OFFSET'])) {\n                this.trigger('warn', {\n                  message: 'ignoring start declaration without appropriate attribute list'\n                });\n                return;\n              }\n\n              this.manifest.start = {\n                timeOffset: entry.attributes['TIME-OFFSET'],\n                precise: entry.attributes.PRECISE\n              };\n            },\n            'cue-out': function cueOut() {\n              currentUri.cueOut = entry.data;\n            },\n            'cue-out-cont': function cueOutCont() {\n              currentUri.cueOutCont = entry.data;\n            },\n            'cue-in': function cueIn() {\n              currentUri.cueIn = entry.data;\n            },\n            'skip': function skip() {\n              this.manifest.skip = camelCaseKeys(entry.attributes);\n              this.warnOnMissingAttributes_('#EXT-X-SKIP', entry.attributes, ['SKIPPED-SEGMENTS']);\n            },\n            'part': function part() {\n              var _this2 = this;\n\n              hasParts = true; // parts are always specifed before a segment\n\n              var segmentIndex = this.manifest.segments.length;\n              var part = camelCaseKeys(entry.attributes);\n              currentUri.parts = currentUri.parts || [];\n              currentUri.parts.push(part);\n\n              if (part.byterange) {\n                if (!part.byterange.hasOwnProperty('offset')) {\n                  part.byterange.offset = lastPartByterangeEnd;\n                }\n\n                lastPartByterangeEnd = part.byterange.offset + part.byterange.length;\n              }\n\n              var partIndex = currentUri.parts.length - 1;\n              this.warnOnMissingAttributes_(\"#EXT-X-PART #\" + partIndex + \" for segment #\" + segmentIndex, entry.attributes, ['URI', 'DURATION']);\n\n              if (this.manifest.renditionReports) {\n                this.manifest.renditionReports.forEach(function (r, i) {\n                  if (!r.hasOwnProperty('lastPart')) {\n                    _this2.trigger('warn', {\n                      message: \"#EXT-X-RENDITION-REPORT #\" + i + \" lacks required attribute(s): LAST-PART\"\n                    });\n                  }\n                });\n              }\n            },\n            'server-control': function serverControl() {\n              var attrs = this.manifest.serverControl = camelCaseKeys(entry.attributes);\n\n              if (!attrs.hasOwnProperty('canBlockReload')) {\n                attrs.canBlockReload = false;\n                this.trigger('info', {\n                  message: '#EXT-X-SERVER-CONTROL defaulting CAN-BLOCK-RELOAD to false'\n                });\n              }\n\n              setHoldBack.call(this, this.manifest);\n\n              if (attrs.canSkipDateranges && !attrs.hasOwnProperty('canSkipUntil')) {\n                this.trigger('warn', {\n                  message: '#EXT-X-SERVER-CONTROL lacks required attribute CAN-SKIP-UNTIL which is required when CAN-SKIP-DATERANGES is set'\n                });\n              }\n            },\n            'preload-hint': function preloadHint() {\n              // parts are always specifed before a segment\n              var segmentIndex = this.manifest.segments.length;\n              var hint = camelCaseKeys(entry.attributes);\n              var isPart = hint.type && hint.type === 'PART';\n              currentUri.preloadHints = currentUri.preloadHints || [];\n              currentUri.preloadHints.push(hint);\n\n              if (hint.byterange) {\n                if (!hint.byterange.hasOwnProperty('offset')) {\n                  // use last part byterange end or zero if not a part.\n                  hint.byterange.offset = isPart ? lastPartByterangeEnd : 0;\n\n                  if (isPart) {\n                    lastPartByterangeEnd = hint.byterange.offset + hint.byterange.length;\n                  }\n                }\n              }\n\n              var index = currentUri.preloadHints.length - 1;\n              this.warnOnMissingAttributes_(\"#EXT-X-PRELOAD-HINT #\" + index + \" for segment #\" + segmentIndex, entry.attributes, ['TYPE', 'URI']);\n\n              if (!hint.type) {\n                return;\n              } // search through all preload hints except for the current one for\n              // a duplicate type.\n\n\n              for (var i = 0; i < currentUri.preloadHints.length - 1; i++) {\n                var otherHint = currentUri.preloadHints[i];\n\n                if (!otherHint.type) {\n                  continue;\n                }\n\n                if (otherHint.type === hint.type) {\n                  this.trigger('warn', {\n                    message: \"#EXT-X-PRELOAD-HINT #\" + index + \" for segment #\" + segmentIndex + \" has the same TYPE \" + hint.type + \" as preload hint #\" + i\n                  });\n                }\n              }\n            },\n            'rendition-report': function renditionReport() {\n              var report = camelCaseKeys(entry.attributes);\n              this.manifest.renditionReports = this.manifest.renditionReports || [];\n              this.manifest.renditionReports.push(report);\n              var index = this.manifest.renditionReports.length - 1;\n              var required = ['LAST-MSN', 'URI'];\n\n              if (hasParts) {\n                required.push('LAST-PART');\n              }\n\n              this.warnOnMissingAttributes_(\"#EXT-X-RENDITION-REPORT #\" + index, entry.attributes, required);\n            },\n            'part-inf': function partInf() {\n              this.manifest.partInf = camelCaseKeys(entry.attributes);\n              this.warnOnMissingAttributes_('#EXT-X-PART-INF', entry.attributes, ['PART-TARGET']);\n\n              if (this.manifest.partInf.partTarget) {\n                this.manifest.partTargetDuration = this.manifest.partInf.partTarget;\n              }\n\n              setHoldBack.call(this, this.manifest);\n            }\n          })[entry.tagType] || noop).call(self);\n        },\n        uri: function uri() {\n          currentUri.uri = entry.uri;\n          uris.push(currentUri); // if no explicit duration was declared, use the target duration\n\n          if (this.manifest.targetDuration && !('duration' in currentUri)) {\n            this.trigger('warn', {\n              message: 'defaulting segment duration to the target duration'\n            });\n            currentUri.duration = this.manifest.targetDuration;\n          } // annotate with encryption information, if necessary\n\n\n          if (_key) {\n            currentUri.key = _key;\n          }\n\n          currentUri.timeline = currentTimeline; // annotate with initialization segment information, if necessary\n\n          if (currentMap) {\n            currentUri.map = currentMap;\n          } // reset the last byterange end as it needs to be 0 between parts\n\n\n          lastPartByterangeEnd = 0; // prepare for the next URI\n\n          currentUri = {};\n        },\n        comment: function comment() {// comments are not important for playback\n        },\n        custom: function custom() {\n          // if this is segment-level data attach the output to the segment\n          if (entry.segment) {\n            currentUri.custom = currentUri.custom || {};\n            currentUri.custom[entry.customType] = entry.data; // if this is manifest-level data attach to the top level manifest object\n          } else {\n            this.manifest.custom = this.manifest.custom || {};\n            this.manifest.custom[entry.customType] = entry.data;\n          }\n        }\n      })[entry.type].call(self);\n    });\n\n    return _this;\n  }\n\n  var _proto = Parser.prototype;\n\n  _proto.warnOnMissingAttributes_ = function warnOnMissingAttributes_(identifier, attributes, required) {\n    var missing = [];\n    required.forEach(function (key) {\n      if (!attributes.hasOwnProperty(key)) {\n        missing.push(key);\n      }\n    });\n\n    if (missing.length) {\n      this.trigger('warn', {\n        message: identifier + \" lacks required attribute(s): \" + missing.join(', ')\n      });\n    }\n  }\n  /**\n   * Parse the input string and update the manifest object.\n   *\n   * @param {string} chunk a potentially incomplete portion of the manifest\n   */\n  ;\n\n  _proto.push = function push(chunk) {\n    this.lineStream.push(chunk);\n  }\n  /**\n   * Flush any remaining input. This can be handy if the last line of an M3U8\n   * manifest did not contain a trailing newline but the file has been\n   * completely received.\n   */\n  ;\n\n  _proto.end = function end() {\n    // flush any buffered input\n    this.lineStream.push('\\n');\n    this.trigger('end');\n  }\n  /**\n   * Add an additional parser for non-standard tags\n   *\n   * @param {Object}   options              a map of options for the added parser\n   * @param {RegExp}   options.expression   a regular expression to match the custom header\n   * @param {string}   options.type         the type to register to the output\n   * @param {Function} [options.dataParser] function to parse the line into an object\n   * @param {boolean}  [options.segment]    should tag data be attached to the segment object\n   */\n  ;\n\n  _proto.addParser = function addParser(options) {\n    this.parseStream.addParser(options);\n  }\n  /**\n   * Add a custom header mapper\n   *\n   * @param {Object}   options\n   * @param {RegExp}   options.expression   a regular expression to match the custom header\n   * @param {Function} options.map          function to translate tag into a different tag\n   */\n  ;\n\n  _proto.addTagMapper = function addTagMapper(options) {\n    this.parseStream.addTagMapper(options);\n  };\n\n  return Parser;\n}(Stream);\n\nexport { LineStream, ParseStream, Parser };\n","import window from 'global/window'; // const log2 = Math.log2 ? Math.log2 : (x) => (Math.log(x) / Math.log(2));\n\nvar repeat = function repeat(str, len) {\n  var acc = '';\n\n  while (len--) {\n    acc += str;\n  }\n\n  return acc;\n}; // count the number of bits it would take to represent a number\n// we used to do this with log2 but BigInt does not support builtin math\n// Math.ceil(log2(x));\n\n\nexport var countBits = function countBits(x) {\n  return x.toString(2).length;\n}; // count the number of whole bytes it would take to represent a number\n\nexport var countBytes = function countBytes(x) {\n  return Math.ceil(countBits(x) / 8);\n};\nexport var padStart = function padStart(b, len, str) {\n  if (str === void 0) {\n    str = ' ';\n  }\n\n  return (repeat(str, len) + b.toString()).slice(-len);\n};\nexport var isArrayBufferView = function isArrayBufferView(obj) {\n  if (ArrayBuffer.isView === 'function') {\n    return ArrayBuffer.isView(obj);\n  }\n\n  return obj && obj.buffer instanceof ArrayBuffer;\n};\nexport var isTypedArray = function isTypedArray(obj) {\n  return isArrayBufferView(obj);\n};\nexport var toUint8 = function toUint8(bytes) {\n  if (bytes instanceof Uint8Array) {\n    return bytes;\n  }\n\n  if (!Array.isArray(bytes) && !isTypedArray(bytes) && !(bytes instanceof ArrayBuffer)) {\n    // any non-number or NaN leads to empty uint8array\n    // eslint-disable-next-line\n    if (typeof bytes !== 'number' || typeof bytes === 'number' && bytes !== bytes) {\n      bytes = 0;\n    } else {\n      bytes = [bytes];\n    }\n  }\n\n  return new Uint8Array(bytes && bytes.buffer || bytes, bytes && bytes.byteOffset || 0, bytes && bytes.byteLength || 0);\n};\nexport var toHexString = function toHexString(bytes) {\n  bytes = toUint8(bytes);\n  var str = '';\n\n  for (var i = 0; i < bytes.length; i++) {\n    str += padStart(bytes[i].toString(16), 2, '0');\n  }\n\n  return str;\n};\nexport var toBinaryString = function toBinaryString(bytes) {\n  bytes = toUint8(bytes);\n  var str = '';\n\n  for (var i = 0; i < bytes.length; i++) {\n    str += padStart(bytes[i].toString(2), 8, '0');\n  }\n\n  return str;\n};\nvar BigInt = window.BigInt || Number;\nvar BYTE_TABLE = [BigInt('0x1'), BigInt('0x100'), BigInt('0x10000'), BigInt('0x1000000'), BigInt('0x100000000'), BigInt('0x10000000000'), BigInt('0x1000000000000'), BigInt('0x100000000000000'), BigInt('0x10000000000000000')];\nexport var ENDIANNESS = function () {\n  var a = new Uint16Array([0xFFCC]);\n  var b = new Uint8Array(a.buffer, a.byteOffset, a.byteLength);\n\n  if (b[0] === 0xFF) {\n    return 'big';\n  }\n\n  if (b[0] === 0xCC) {\n    return 'little';\n  }\n\n  return 'unknown';\n}();\nexport var IS_BIG_ENDIAN = ENDIANNESS === 'big';\nexport var IS_LITTLE_ENDIAN = ENDIANNESS === 'little';\nexport var bytesToNumber = function bytesToNumber(bytes, _temp) {\n  var _ref = _temp === void 0 ? {} : _temp,\n      _ref$signed = _ref.signed,\n      signed = _ref$signed === void 0 ? false : _ref$signed,\n      _ref$le = _ref.le,\n      le = _ref$le === void 0 ? false : _ref$le;\n\n  bytes = toUint8(bytes);\n  var fn = le ? 'reduce' : 'reduceRight';\n  var obj = bytes[fn] ? bytes[fn] : Array.prototype[fn];\n  var number = obj.call(bytes, function (total, byte, i) {\n    var exponent = le ? i : Math.abs(i + 1 - bytes.length);\n    return total + BigInt(byte) * BYTE_TABLE[exponent];\n  }, BigInt(0));\n\n  if (signed) {\n    var max = BYTE_TABLE[bytes.length] / BigInt(2) - BigInt(1);\n    number = BigInt(number);\n\n    if (number > max) {\n      number -= max;\n      number -= max;\n      number -= BigInt(2);\n    }\n  }\n\n  return Number(number);\n};\nexport var numberToBytes = function numberToBytes(number, _temp2) {\n  var _ref2 = _temp2 === void 0 ? {} : _temp2,\n      _ref2$le = _ref2.le,\n      le = _ref2$le === void 0 ? false : _ref2$le;\n\n  // eslint-disable-next-line\n  if (typeof number !== 'bigint' && typeof number !== 'number' || typeof number === 'number' && number !== number) {\n    number = 0;\n  }\n\n  number = BigInt(number);\n  var byteCount = countBytes(number);\n  var bytes = new Uint8Array(new ArrayBuffer(byteCount));\n\n  for (var i = 0; i < byteCount; i++) {\n    var byteIndex = le ? i : Math.abs(i + 1 - bytes.length);\n    bytes[byteIndex] = Number(number / BYTE_TABLE[i] & BigInt(0xFF));\n\n    if (number < 0) {\n      bytes[byteIndex] = Math.abs(~bytes[byteIndex]);\n      bytes[byteIndex] -= i === 0 ? 1 : 2;\n    }\n  }\n\n  return bytes;\n};\nexport var bytesToString = function bytesToString(bytes) {\n  if (!bytes) {\n    return '';\n  } // TODO: should toUint8 handle cases where we only have 8 bytes\n  // but report more since this is a Uint16+ Array?\n\n\n  bytes = Array.prototype.slice.call(bytes);\n  var string = String.fromCharCode.apply(null, toUint8(bytes));\n\n  try {\n    return decodeURIComponent(escape(string));\n  } catch (e) {// if decodeURIComponent/escape fails, we are dealing with partial\n    // or full non string data. Just return the potentially garbled string.\n  }\n\n  return string;\n};\nexport var stringToBytes = function stringToBytes(string, stringIsBytes) {\n  if (typeof string !== 'string' && string && typeof string.toString === 'function') {\n    string = string.toString();\n  }\n\n  if (typeof string !== 'string') {\n    return new Uint8Array();\n  } // If the string already is bytes, we don't have to do this\n  // otherwise we do this so that we split multi length characters\n  // into individual bytes\n\n\n  if (!stringIsBytes) {\n    string = unescape(encodeURIComponent(string));\n  }\n\n  var view = new Uint8Array(string.length);\n\n  for (var i = 0; i < string.length; i++) {\n    view[i] = string.charCodeAt(i);\n  }\n\n  return view;\n};\nexport var concatTypedArrays = function concatTypedArrays() {\n  for (var _len = arguments.length, buffers = new Array(_len), _key = 0; _key < _len; _key++) {\n    buffers[_key] = arguments[_key];\n  }\n\n  buffers = buffers.filter(function (b) {\n    return b && (b.byteLength || b.length) && typeof b !== 'string';\n  });\n\n  if (buffers.length <= 1) {\n    // for 0 length we will return empty uint8\n    // for 1 length we return the first uint8\n    return toUint8(buffers[0]);\n  }\n\n  var totalLen = buffers.reduce(function (total, buf, i) {\n    return total + (buf.byteLength || buf.length);\n  }, 0);\n  var tempBuffer = new Uint8Array(totalLen);\n  var offset = 0;\n  buffers.forEach(function (buf) {\n    buf = toUint8(buf);\n    tempBuffer.set(buf, offset);\n    offset += buf.byteLength;\n  });\n  return tempBuffer;\n};\n/**\n * Check if the bytes \"b\" are contained within bytes \"a\".\n *\n * @param {Uint8Array|Array} a\n *        Bytes to check in\n *\n * @param {Uint8Array|Array} b\n *        Bytes to check for\n *\n * @param {Object} options\n *        options\n *\n * @param {Array|Uint8Array} [offset=0]\n *        offset to use when looking at bytes in a\n *\n * @param {Array|Uint8Array} [mask=[]]\n *        mask to use on bytes before comparison.\n *\n * @return {boolean}\n *         If all bytes in b are inside of a, taking into account\n *         bit masks.\n */\n\nexport var bytesMatch = function bytesMatch(a, b, _temp3) {\n  var _ref3 = _temp3 === void 0 ? {} : _temp3,\n      _ref3$offset = _ref3.offset,\n      offset = _ref3$offset === void 0 ? 0 : _ref3$offset,\n      _ref3$mask = _ref3.mask,\n      mask = _ref3$mask === void 0 ? [] : _ref3$mask;\n\n  a = toUint8(a);\n  b = toUint8(b); // ie 11 does not support uint8 every\n\n  var fn = b.every ? b.every : Array.prototype.every;\n  return b.length && a.length - offset >= b.length && // ie 11 doesn't support every on uin8\n  fn.call(b, function (bByte, i) {\n    var aByte = mask[i] ? mask[i] & a[offset + i] : a[offset + i];\n    return bByte === aByte;\n  });\n};\nexport var sliceBytes = function sliceBytes(src, start, end) {\n  if (Uint8Array.prototype.slice) {\n    return Uint8Array.prototype.slice.call(src, start, end);\n  }\n\n  return new Uint8Array(Array.prototype.slice.call(src, start, end));\n};\nexport var reverseBytes = function reverseBytes(src) {\n  if (src.reverse) {\n    return src.reverse();\n  }\n\n  return Array.prototype.reverse.call(src);\n};","import { stringToBytes, toUint8, bytesMatch, bytesToString, toHexString, padStart, bytesToNumber } from './byte-helpers.js';\nimport { getAvcCodec, getHvcCodec, getAv1Codec } from './codec-helpers.js';\nimport { parseOpusHead } from './opus-helpers.js';\n\nvar normalizePath = function normalizePath(path) {\n  if (typeof path === 'string') {\n    return stringToBytes(path);\n  }\n\n  if (typeof path === 'number') {\n    return path;\n  }\n\n  return path;\n};\n\nvar normalizePaths = function normalizePaths(paths) {\n  if (!Array.isArray(paths)) {\n    return [normalizePath(paths)];\n  }\n\n  return paths.map(function (p) {\n    return normalizePath(p);\n  });\n};\n\nvar DESCRIPTORS;\nexport var parseDescriptors = function parseDescriptors(bytes) {\n  bytes = toUint8(bytes);\n  var results = [];\n  var i = 0;\n\n  while (bytes.length > i) {\n    var tag = bytes[i];\n    var size = 0;\n    var headerSize = 0; // tag\n\n    headerSize++;\n    var byte = bytes[headerSize]; // first byte\n\n    headerSize++;\n\n    while (byte & 0x80) {\n      size = (byte & 0x7F) << 7;\n      byte = bytes[headerSize];\n      headerSize++;\n    }\n\n    size += byte & 0x7F;\n\n    for (var z = 0; z < DESCRIPTORS.length; z++) {\n      var _DESCRIPTORS$z = DESCRIPTORS[z],\n          id = _DESCRIPTORS$z.id,\n          parser = _DESCRIPTORS$z.parser;\n\n      if (tag === id) {\n        results.push(parser(bytes.subarray(headerSize, headerSize + size)));\n        break;\n      }\n    }\n\n    i += size + headerSize;\n  }\n\n  return results;\n};\nDESCRIPTORS = [{\n  id: 0x03,\n  parser: function parser(bytes) {\n    var desc = {\n      tag: 0x03,\n      id: bytes[0] << 8 | bytes[1],\n      flags: bytes[2],\n      size: 3,\n      dependsOnEsId: 0,\n      ocrEsId: 0,\n      descriptors: [],\n      url: ''\n    }; // depends on es id\n\n    if (desc.flags & 0x80) {\n      desc.dependsOnEsId = bytes[desc.size] << 8 | bytes[desc.size + 1];\n      desc.size += 2;\n    } // url\n\n\n    if (desc.flags & 0x40) {\n      var len = bytes[desc.size];\n      desc.url = bytesToString(bytes.subarray(desc.size + 1, desc.size + 1 + len));\n      desc.size += len;\n    } // ocr es id\n\n\n    if (desc.flags & 0x20) {\n      desc.ocrEsId = bytes[desc.size] << 8 | bytes[desc.size + 1];\n      desc.size += 2;\n    }\n\n    desc.descriptors = parseDescriptors(bytes.subarray(desc.size)) || [];\n    return desc;\n  }\n}, {\n  id: 0x04,\n  parser: function parser(bytes) {\n    // DecoderConfigDescriptor\n    var desc = {\n      tag: 0x04,\n      oti: bytes[0],\n      streamType: bytes[1],\n      bufferSize: bytes[2] << 16 | bytes[3] << 8 | bytes[4],\n      maxBitrate: bytes[5] << 24 | bytes[6] << 16 | bytes[7] << 8 | bytes[8],\n      avgBitrate: bytes[9] << 24 | bytes[10] << 16 | bytes[11] << 8 | bytes[12],\n      descriptors: parseDescriptors(bytes.subarray(13))\n    };\n    return desc;\n  }\n}, {\n  id: 0x05,\n  parser: function parser(bytes) {\n    // DecoderSpecificInfo\n    return {\n      tag: 0x05,\n      bytes: bytes\n    };\n  }\n}, {\n  id: 0x06,\n  parser: function parser(bytes) {\n    // SLConfigDescriptor\n    return {\n      tag: 0x06,\n      bytes: bytes\n    };\n  }\n}];\n/**\n * find any number of boxes by name given a path to it in an iso bmff\n * such as mp4.\n *\n * @param {TypedArray} bytes\n *        bytes for the iso bmff to search for boxes in\n *\n * @param {Uint8Array[]|string[]|string|Uint8Array} name\n *        An array of paths or a single path representing the name\n *        of boxes to search through in bytes. Paths may be\n *        uint8 (character codes) or strings.\n *\n * @param {boolean} [complete=false]\n *        Should we search only for complete boxes on the final path.\n *        This is very useful when you do not want to get back partial boxes\n *        in the case of streaming files.\n *\n * @return {Uint8Array[]}\n *         An array of the end paths that we found.\n */\n\nexport var findBox = function findBox(bytes, paths, complete) {\n  if (complete === void 0) {\n    complete = false;\n  }\n\n  paths = normalizePaths(paths);\n  bytes = toUint8(bytes);\n  var results = [];\n\n  if (!paths.length) {\n    // short-circuit the search for empty paths\n    return results;\n  }\n\n  var i = 0;\n\n  while (i < bytes.length) {\n    var size = (bytes[i] << 24 | bytes[i + 1] << 16 | bytes[i + 2] << 8 | bytes[i + 3]) >>> 0;\n    var type = bytes.subarray(i + 4, i + 8); // invalid box format.\n\n    if (size === 0) {\n      break;\n    }\n\n    var end = i + size;\n\n    if (end > bytes.length) {\n      // this box is bigger than the number of bytes we have\n      // and complete is set, we cannot find any more boxes.\n      if (complete) {\n        break;\n      }\n\n      end = bytes.length;\n    }\n\n    var data = bytes.subarray(i + 8, end);\n\n    if (bytesMatch(type, paths[0])) {\n      if (paths.length === 1) {\n        // this is the end of the path and we've found the box we were\n        // looking for\n        results.push(data);\n      } else {\n        // recursively search for the next box along the path\n        results.push.apply(results, findBox(data, paths.slice(1), complete));\n      }\n    }\n\n    i = end;\n  } // we've finished searching all of bytes\n\n\n  return results;\n};\n/**\n * Search for a single matching box by name in an iso bmff format like\n * mp4. This function is useful for finding codec boxes which\n * can be placed arbitrarily in sample descriptions depending\n * on the version of the file or file type.\n *\n * @param {TypedArray} bytes\n *        bytes for the iso bmff to search for boxes in\n *\n * @param {string|Uint8Array} name\n *        The name of the box to find.\n *\n * @return {Uint8Array[]}\n *         a subarray of bytes representing the name boxed we found.\n */\n\nexport var findNamedBox = function findNamedBox(bytes, name) {\n  name = normalizePath(name);\n\n  if (!name.length) {\n    // short-circuit the search for empty paths\n    return bytes.subarray(bytes.length);\n  }\n\n  var i = 0;\n\n  while (i < bytes.length) {\n    if (bytesMatch(bytes.subarray(i, i + name.length), name)) {\n      var size = (bytes[i - 4] << 24 | bytes[i - 3] << 16 | bytes[i - 2] << 8 | bytes[i - 1]) >>> 0;\n      var end = size > 1 ? i + size : bytes.byteLength;\n      return bytes.subarray(i + 4, end);\n    }\n\n    i++;\n  } // we've finished searching all of bytes\n\n\n  return bytes.subarray(bytes.length);\n};\n\nvar parseSamples = function parseSamples(data, entrySize, parseEntry) {\n  if (entrySize === void 0) {\n    entrySize = 4;\n  }\n\n  if (parseEntry === void 0) {\n    parseEntry = function parseEntry(d) {\n      return bytesToNumber(d);\n    };\n  }\n\n  var entries = [];\n\n  if (!data || !data.length) {\n    return entries;\n  }\n\n  var entryCount = bytesToNumber(data.subarray(4, 8));\n\n  for (var i = 8; entryCount; i += entrySize, entryCount--) {\n    entries.push(parseEntry(data.subarray(i, i + entrySize)));\n  }\n\n  return entries;\n};\n\nexport var buildFrameTable = function buildFrameTable(stbl, timescale) {\n  var keySamples = parseSamples(findBox(stbl, ['stss'])[0]);\n  var chunkOffsets = parseSamples(findBox(stbl, ['stco'])[0]);\n  var timeToSamples = parseSamples(findBox(stbl, ['stts'])[0], 8, function (entry) {\n    return {\n      sampleCount: bytesToNumber(entry.subarray(0, 4)),\n      sampleDelta: bytesToNumber(entry.subarray(4, 8))\n    };\n  });\n  var samplesToChunks = parseSamples(findBox(stbl, ['stsc'])[0], 12, function (entry) {\n    return {\n      firstChunk: bytesToNumber(entry.subarray(0, 4)),\n      samplesPerChunk: bytesToNumber(entry.subarray(4, 8)),\n      sampleDescriptionIndex: bytesToNumber(entry.subarray(8, 12))\n    };\n  });\n  var stsz = findBox(stbl, ['stsz'])[0]; // stsz starts with a 4 byte sampleSize which we don't need\n\n  var sampleSizes = parseSamples(stsz && stsz.length && stsz.subarray(4) || null);\n  var frames = [];\n\n  for (var chunkIndex = 0; chunkIndex < chunkOffsets.length; chunkIndex++) {\n    var samplesInChunk = void 0;\n\n    for (var i = 0; i < samplesToChunks.length; i++) {\n      var sampleToChunk = samplesToChunks[i];\n      var isThisOne = chunkIndex + 1 >= sampleToChunk.firstChunk && (i + 1 >= samplesToChunks.length || chunkIndex + 1 < samplesToChunks[i + 1].firstChunk);\n\n      if (isThisOne) {\n        samplesInChunk = sampleToChunk.samplesPerChunk;\n        break;\n      }\n    }\n\n    var chunkOffset = chunkOffsets[chunkIndex];\n\n    for (var _i = 0; _i < samplesInChunk; _i++) {\n      var frameEnd = sampleSizes[frames.length]; // if we don't have key samples every frame is a keyframe\n\n      var keyframe = !keySamples.length;\n\n      if (keySamples.length && keySamples.indexOf(frames.length + 1) !== -1) {\n        keyframe = true;\n      }\n\n      var frame = {\n        keyframe: keyframe,\n        start: chunkOffset,\n        end: chunkOffset + frameEnd\n      };\n\n      for (var k = 0; k < timeToSamples.length; k++) {\n        var _timeToSamples$k = timeToSamples[k],\n            sampleCount = _timeToSamples$k.sampleCount,\n            sampleDelta = _timeToSamples$k.sampleDelta;\n\n        if (frames.length <= sampleCount) {\n          // ms to ns\n          var lastTimestamp = frames.length ? frames[frames.length - 1].timestamp : 0;\n          frame.timestamp = lastTimestamp + sampleDelta / timescale * 1000;\n          frame.duration = sampleDelta;\n          break;\n        }\n      }\n\n      frames.push(frame);\n      chunkOffset += frameEnd;\n    }\n  }\n\n  return frames;\n};\nexport var addSampleDescription = function addSampleDescription(track, bytes) {\n  var codec = bytesToString(bytes.subarray(0, 4));\n\n  if (track.type === 'video') {\n    track.info = track.info || {};\n    track.info.width = bytes[28] << 8 | bytes[29];\n    track.info.height = bytes[30] << 8 | bytes[31];\n  } else if (track.type === 'audio') {\n    track.info = track.info || {};\n    track.info.channels = bytes[20] << 8 | bytes[21];\n    track.info.bitDepth = bytes[22] << 8 | bytes[23];\n    track.info.sampleRate = bytes[28] << 8 | bytes[29];\n  }\n\n  if (codec === 'avc1') {\n    var avcC = findNamedBox(bytes, 'avcC'); // AVCDecoderConfigurationRecord\n\n    codec += \".\" + getAvcCodec(avcC);\n    track.info.avcC = avcC; // TODO: do we need to parse all this?\n\n    /* {\n      configurationVersion: avcC[0],\n      profile: avcC[1],\n      profileCompatibility: avcC[2],\n      level: avcC[3],\n      lengthSizeMinusOne: avcC[4] & 0x3\n    };\n     let spsNalUnitCount = avcC[5] & 0x1F;\n    const spsNalUnits = track.info.avc.spsNalUnits = [];\n     // past spsNalUnitCount\n    let offset = 6;\n     while (spsNalUnitCount--) {\n      const nalLen = avcC[offset] << 8 | avcC[offset + 1];\n       spsNalUnits.push(avcC.subarray(offset + 2, offset + 2 + nalLen));\n       offset += nalLen + 2;\n    }\n    let ppsNalUnitCount = avcC[offset];\n    const ppsNalUnits = track.info.avc.ppsNalUnits = [];\n     // past ppsNalUnitCount\n    offset += 1;\n     while (ppsNalUnitCount--) {\n      const nalLen = avcC[offset] << 8 | avcC[offset + 1];\n       ppsNalUnits.push(avcC.subarray(offset + 2, offset + 2 + nalLen));\n       offset += nalLen + 2;\n    }*/\n    // HEVCDecoderConfigurationRecord\n  } else if (codec === 'hvc1' || codec === 'hev1') {\n    codec += \".\" + getHvcCodec(findNamedBox(bytes, 'hvcC'));\n  } else if (codec === 'mp4a' || codec === 'mp4v') {\n    var esds = findNamedBox(bytes, 'esds');\n    var esDescriptor = parseDescriptors(esds.subarray(4))[0];\n    var decoderConfig = esDescriptor && esDescriptor.descriptors.filter(function (_ref) {\n      var tag = _ref.tag;\n      return tag === 0x04;\n    })[0];\n\n    if (decoderConfig) {\n      // most codecs do not have a further '.'\n      // such as 0xa5 for ac-3 and 0xa6 for e-ac-3\n      codec += '.' + toHexString(decoderConfig.oti);\n\n      if (decoderConfig.oti === 0x40) {\n        codec += '.' + (decoderConfig.descriptors[0].bytes[0] >> 3).toString();\n      } else if (decoderConfig.oti === 0x20) {\n        codec += '.' + decoderConfig.descriptors[0].bytes[4].toString();\n      } else if (decoderConfig.oti === 0xdd) {\n        codec = 'vorbis';\n      }\n    } else if (track.type === 'audio') {\n      codec += '.40.2';\n    } else {\n      codec += '.20.9';\n    }\n  } else if (codec === 'av01') {\n    // AV1DecoderConfigurationRecord\n    codec += \".\" + getAv1Codec(findNamedBox(bytes, 'av1C'));\n  } else if (codec === 'vp09') {\n    // VPCodecConfigurationRecord\n    var vpcC = findNamedBox(bytes, 'vpcC'); // https://www.webmproject.org/vp9/mp4/\n\n    var profile = vpcC[0];\n    var level = vpcC[1];\n    var bitDepth = vpcC[2] >> 4;\n    var chromaSubsampling = (vpcC[2] & 0x0F) >> 1;\n    var videoFullRangeFlag = (vpcC[2] & 0x0F) >> 3;\n    var colourPrimaries = vpcC[3];\n    var transferCharacteristics = vpcC[4];\n    var matrixCoefficients = vpcC[5];\n    codec += \".\" + padStart(profile, 2, '0');\n    codec += \".\" + padStart(level, 2, '0');\n    codec += \".\" + padStart(bitDepth, 2, '0');\n    codec += \".\" + padStart(chromaSubsampling, 2, '0');\n    codec += \".\" + padStart(colourPrimaries, 2, '0');\n    codec += \".\" + padStart(transferCharacteristics, 2, '0');\n    codec += \".\" + padStart(matrixCoefficients, 2, '0');\n    codec += \".\" + padStart(videoFullRangeFlag, 2, '0');\n  } else if (codec === 'theo') {\n    codec = 'theora';\n  } else if (codec === 'spex') {\n    codec = 'speex';\n  } else if (codec === '.mp3') {\n    codec = 'mp4a.40.34';\n  } else if (codec === 'msVo') {\n    codec = 'vorbis';\n  } else if (codec === 'Opus') {\n    codec = 'opus';\n    var dOps = findNamedBox(bytes, 'dOps');\n    track.info.opus = parseOpusHead(dOps); // TODO: should this go into the webm code??\n    // Firefox requires a codecDelay for opus playback\n    // see https://bugzilla.mozilla.org/show_bug.cgi?id=1276238\n\n    track.info.codecDelay = 6500000;\n  } else {\n    codec = codec.toLowerCase();\n  }\n  /* eslint-enable */\n  // flac, ac-3, ec-3, opus\n\n\n  track.codec = codec;\n};\nexport var parseTracks = function parseTracks(bytes, frameTable) {\n  if (frameTable === void 0) {\n    frameTable = true;\n  }\n\n  bytes = toUint8(bytes);\n  var traks = findBox(bytes, ['moov', 'trak'], true);\n  var tracks = [];\n  traks.forEach(function (trak) {\n    var track = {\n      bytes: trak\n    };\n    var mdia = findBox(trak, ['mdia'])[0];\n    var hdlr = findBox(mdia, ['hdlr'])[0];\n    var trakType = bytesToString(hdlr.subarray(8, 12));\n\n    if (trakType === 'soun') {\n      track.type = 'audio';\n    } else if (trakType === 'vide') {\n      track.type = 'video';\n    } else {\n      track.type = trakType;\n    }\n\n    var tkhd = findBox(trak, ['tkhd'])[0];\n\n    if (tkhd) {\n      var view = new DataView(tkhd.buffer, tkhd.byteOffset, tkhd.byteLength);\n      var tkhdVersion = view.getUint8(0);\n      track.number = tkhdVersion === 0 ? view.getUint32(12) : view.getUint32(20);\n    }\n\n    var mdhd = findBox(mdia, ['mdhd'])[0];\n\n    if (mdhd) {\n      // mdhd is a FullBox, meaning it will have its own version as the first byte\n      var version = mdhd[0];\n      var index = version === 0 ? 12 : 20;\n      track.timescale = (mdhd[index] << 24 | mdhd[index + 1] << 16 | mdhd[index + 2] << 8 | mdhd[index + 3]) >>> 0;\n    }\n\n    var stbl = findBox(mdia, ['minf', 'stbl'])[0];\n    var stsd = findBox(stbl, ['stsd'])[0];\n    var descriptionCount = bytesToNumber(stsd.subarray(4, 8));\n    var offset = 8; // add codec and codec info\n\n    while (descriptionCount--) {\n      var len = bytesToNumber(stsd.subarray(offset, offset + 4));\n      var sampleDescriptor = stsd.subarray(offset + 4, offset + 4 + len);\n      addSampleDescription(track, sampleDescriptor);\n      offset += 4 + len;\n    }\n\n    if (frameTable) {\n      track.frameTable = buildFrameTable(stbl, track.timescale);\n    } // codec has no sub parameters\n\n\n    tracks.push(track);\n  });\n  return tracks;\n};\nexport var parseMediaInfo = function parseMediaInfo(bytes) {\n  var mvhd = findBox(bytes, ['moov', 'mvhd'], true)[0];\n\n  if (!mvhd || !mvhd.length) {\n    return;\n  }\n\n  var info = {}; // ms to ns\n  // mvhd v1 has 8 byte duration and other fields too\n\n  if (mvhd[0] === 1) {\n    info.timestampScale = bytesToNumber(mvhd.subarray(20, 24));\n    info.duration = bytesToNumber(mvhd.subarray(24, 32));\n  } else {\n    info.timestampScale = bytesToNumber(mvhd.subarray(12, 16));\n    info.duration = bytesToNumber(mvhd.subarray(16, 20));\n  }\n\n  info.bytes = mvhd;\n  return info;\n};","import window from 'global/window';\nvar regexs = {\n  // to determine mime types\n  mp4: /^(av0?1|avc0?[1234]|vp0?9|flac|opus|mp3|mp4a|mp4v|stpp.ttml.im1t)/,\n  webm: /^(vp0?[89]|av0?1|opus|vorbis)/,\n  ogg: /^(vp0?[89]|theora|flac|opus|vorbis)/,\n  // to determine if a codec is audio or video\n  video: /^(av0?1|avc0?[1234]|vp0?[89]|hvc1|hev1|theora|mp4v)/,\n  audio: /^(mp4a|flac|vorbis|opus|ac-[34]|ec-3|alac|mp3|speex|aac)/,\n  text: /^(stpp.ttml.im1t)/,\n  // mux.js support regex\n  muxerVideo: /^(avc0?1)/,\n  muxerAudio: /^(mp4a)/,\n  // match nothing as muxer does not support text right now.\n  // there cannot never be a character before the start of a string\n  // so this matches nothing.\n  muxerText: /a^/\n};\nvar mediaTypes = ['video', 'audio', 'text'];\nvar upperMediaTypes = ['Video', 'Audio', 'Text'];\n/**\n * Replace the old apple-style `avc1.<dd>.<dd>` codec string with the standard\n * `avc1.<hhhhhh>`\n *\n * @param {string} codec\n *        Codec string to translate\n * @return {string}\n *         The translated codec string\n */\n\nexport var translateLegacyCodec = function translateLegacyCodec(codec) {\n  if (!codec) {\n    return codec;\n  }\n\n  return codec.replace(/avc1\\.(\\d+)\\.(\\d+)/i, function (orig, profile, avcLevel) {\n    var profileHex = ('00' + Number(profile).toString(16)).slice(-2);\n    var avcLevelHex = ('00' + Number(avcLevel).toString(16)).slice(-2);\n    return 'avc1.' + profileHex + '00' + avcLevelHex;\n  });\n};\n/**\n * Replace the old apple-style `avc1.<dd>.<dd>` codec strings with the standard\n * `avc1.<hhhhhh>`\n *\n * @param {string[]} codecs\n *        An array of codec strings to translate\n * @return {string[]}\n *         The translated array of codec strings\n */\n\nexport var translateLegacyCodecs = function translateLegacyCodecs(codecs) {\n  return codecs.map(translateLegacyCodec);\n};\n/**\n * Replace codecs in the codec string with the old apple-style `avc1.<dd>.<dd>` to the\n * standard `avc1.<hhhhhh>`.\n *\n * @param {string} codecString\n *        The codec string\n * @return {string}\n *         The codec string with old apple-style codecs replaced\n *\n * @private\n */\n\nexport var mapLegacyAvcCodecs = function mapLegacyAvcCodecs(codecString) {\n  return codecString.replace(/avc1\\.(\\d+)\\.(\\d+)/i, function (match) {\n    return translateLegacyCodecs([match])[0];\n  });\n};\n/**\n * @typedef {Object} ParsedCodecInfo\n * @property {number} codecCount\n *           Number of codecs parsed\n * @property {string} [videoCodec]\n *           Parsed video codec (if found)\n * @property {string} [videoObjectTypeIndicator]\n *           Video object type indicator (if found)\n * @property {string|null} audioProfile\n *           Audio profile\n */\n\n/**\n * Parses a codec string to retrieve the number of codecs specified, the video codec and\n * object type indicator, and the audio profile.\n *\n * @param {string} [codecString]\n *        The codec string to parse\n * @return {ParsedCodecInfo}\n *         Parsed codec info\n */\n\nexport var parseCodecs = function parseCodecs(codecString) {\n  if (codecString === void 0) {\n    codecString = '';\n  }\n\n  var codecs = codecString.split(',');\n  var result = [];\n  codecs.forEach(function (codec) {\n    codec = codec.trim();\n    var codecType;\n    mediaTypes.forEach(function (name) {\n      var match = regexs[name].exec(codec.toLowerCase());\n\n      if (!match || match.length <= 1) {\n        return;\n      }\n\n      codecType = name; // maintain codec case\n\n      var type = codec.substring(0, match[1].length);\n      var details = codec.replace(type, '');\n      result.push({\n        type: type,\n        details: details,\n        mediaType: name\n      });\n    });\n\n    if (!codecType) {\n      result.push({\n        type: codec,\n        details: '',\n        mediaType: 'unknown'\n      });\n    }\n  });\n  return result;\n};\n/**\n * Returns a ParsedCodecInfo object for the default alternate audio playlist if there is\n * a default alternate audio playlist for the provided audio group.\n *\n * @param {Object} master\n *        The master playlist\n * @param {string} audioGroupId\n *        ID of the audio group for which to find the default codec info\n * @return {ParsedCodecInfo}\n *         Parsed codec info\n */\n\nexport var codecsFromDefault = function codecsFromDefault(master, audioGroupId) {\n  if (!master.mediaGroups.AUDIO || !audioGroupId) {\n    return null;\n  }\n\n  var audioGroup = master.mediaGroups.AUDIO[audioGroupId];\n\n  if (!audioGroup) {\n    return null;\n  }\n\n  for (var name in audioGroup) {\n    var audioType = audioGroup[name];\n\n    if (audioType.default && audioType.playlists) {\n      // codec should be the same for all playlists within the audio type\n      return parseCodecs(audioType.playlists[0].attributes.CODECS);\n    }\n  }\n\n  return null;\n};\nexport var isVideoCodec = function isVideoCodec(codec) {\n  if (codec === void 0) {\n    codec = '';\n  }\n\n  return regexs.video.test(codec.trim().toLowerCase());\n};\nexport var isAudioCodec = function isAudioCodec(codec) {\n  if (codec === void 0) {\n    codec = '';\n  }\n\n  return regexs.audio.test(codec.trim().toLowerCase());\n};\nexport var isTextCodec = function isTextCodec(codec) {\n  if (codec === void 0) {\n    codec = '';\n  }\n\n  return regexs.text.test(codec.trim().toLowerCase());\n};\nexport var getMimeForCodec = function getMimeForCodec(codecString) {\n  if (!codecString || typeof codecString !== 'string') {\n    return;\n  }\n\n  var codecs = codecString.toLowerCase().split(',').map(function (c) {\n    return translateLegacyCodec(c.trim());\n  }); // default to video type\n\n  var type = 'video'; // only change to audio type if the only codec we have is\n  // audio\n\n  if (codecs.length === 1 && isAudioCodec(codecs[0])) {\n    type = 'audio';\n  } else if (codecs.length === 1 && isTextCodec(codecs[0])) {\n    // text uses application/<container> for now\n    type = 'application';\n  } // default the container to mp4\n\n\n  var container = 'mp4'; // every codec must be able to go into the container\n  // for that container to be the correct one\n\n  if (codecs.every(function (c) {\n    return regexs.mp4.test(c);\n  })) {\n    container = 'mp4';\n  } else if (codecs.every(function (c) {\n    return regexs.webm.test(c);\n  })) {\n    container = 'webm';\n  } else if (codecs.every(function (c) {\n    return regexs.ogg.test(c);\n  })) {\n    container = 'ogg';\n  }\n\n  return type + \"/\" + container + \";codecs=\\\"\" + codecString + \"\\\"\";\n};\nexport var browserSupportsCodec = function browserSupportsCodec(codecString) {\n  if (codecString === void 0) {\n    codecString = '';\n  }\n\n  return window.MediaSource && window.MediaSource.isTypeSupported && window.MediaSource.isTypeSupported(getMimeForCodec(codecString)) || false;\n};\nexport var muxerSupportsCodec = function muxerSupportsCodec(codecString) {\n  if (codecString === void 0) {\n    codecString = '';\n  }\n\n  return codecString.toLowerCase().split(',').every(function (codec) {\n    codec = codec.trim(); // any match is supported.\n\n    for (var i = 0; i < upperMediaTypes.length; i++) {\n      var type = upperMediaTypes[i];\n\n      if (regexs[\"muxer\" + type].test(codec)) {\n        return true;\n      }\n    }\n\n    return false;\n  });\n};\nexport var DEFAULT_AUDIO_CODEC = 'mp4a.40.2';\nexport var DEFAULT_VIDEO_CODEC = 'avc1.4d400d';","var MPEGURL_REGEX = /^(audio|video|application)\\/(x-|vnd\\.apple\\.)?mpegurl/i;\nvar DASH_REGEX = /^application\\/dash\\+xml/i;\n/**\n * Returns a string that describes the type of source based on a video source object's\n * media type.\n *\n * @see {@link https://dev.w3.org/html5/pf-summary/video.html#dom-source-type|Source Type}\n *\n * @param {string} type\n *        Video source object media type\n * @return {('hls'|'dash'|'vhs-json'|null)}\n *         VHS source type string\n */\n\nexport var simpleTypeFromSourceType = function simpleTypeFromSourceType(type) {\n  if (MPEGURL_REGEX.test(type)) {\n    return 'hls';\n  }\n\n  if (DASH_REGEX.test(type)) {\n    return 'dash';\n  } // Denotes the special case of a manifest object passed to http-streaming instead of a\n  // source URL.\n  //\n  // See https://en.wikipedia.org/wiki/Media_type for details on specifying media types.\n  //\n  // In this case, vnd stands for vendor, video.js for the organization, VHS for this\n  // project, and the +json suffix identifies the structure of the media type.\n\n\n  if (type === 'application/vnd.videojs.vhs+json') {\n    return 'vhs-json';\n  }\n\n  return null;\n};","/*! @name mpd-parser @version 0.21.0 @license Apache-2.0 */\nimport resolveUrl from '@videojs/vhs-utils/es/resolve-url';\nimport window from 'global/window';\nimport { forEachMediaGroup } from '@videojs/vhs-utils/es/media-groups';\nimport decodeB64ToUint8Array from '@videojs/vhs-utils/es/decode-b64-to-uint8-array';\nimport { DOMParser } from '@xmldom/xmldom';\n\nvar version = \"0.21.0\";\n\nvar isObject = function isObject(obj) {\n  return !!obj && typeof obj === 'object';\n};\n\nvar merge = function merge() {\n  for (var _len = arguments.length, objects = new Array(_len), _key = 0; _key < _len; _key++) {\n    objects[_key] = arguments[_key];\n  }\n\n  return objects.reduce(function (result, source) {\n    if (typeof source !== 'object') {\n      return result;\n    }\n\n    Object.keys(source).forEach(function (key) {\n      if (Array.isArray(result[key]) && Array.isArray(source[key])) {\n        result[key] = result[key].concat(source[key]);\n      } else if (isObject(result[key]) && isObject(source[key])) {\n        result[key] = merge(result[key], source[key]);\n      } else {\n        result[key] = source[key];\n      }\n    });\n    return result;\n  }, {});\n};\nvar values = function values(o) {\n  return Object.keys(o).map(function (k) {\n    return o[k];\n  });\n};\n\nvar range = function range(start, end) {\n  var result = [];\n\n  for (var i = start; i < end; i++) {\n    result.push(i);\n  }\n\n  return result;\n};\nvar flatten = function flatten(lists) {\n  return lists.reduce(function (x, y) {\n    return x.concat(y);\n  }, []);\n};\nvar from = function from(list) {\n  if (!list.length) {\n    return [];\n  }\n\n  var result = [];\n\n  for (var i = 0; i < list.length; i++) {\n    result.push(list[i]);\n  }\n\n  return result;\n};\nvar findIndexes = function findIndexes(l, key) {\n  return l.reduce(function (a, e, i) {\n    if (e[key]) {\n      a.push(i);\n    }\n\n    return a;\n  }, []);\n};\n/**\n * Returns the first index that satisfies the matching function, or -1 if not found.\n *\n * Only necessary because of IE11 support.\n *\n * @param {Array} list - the list to search through\n * @param {Function} matchingFunction - the matching function\n *\n * @return {number} the matching index or -1 if not found\n */\n\nvar findIndex = function findIndex(list, matchingFunction) {\n  for (var i = 0; i < list.length; i++) {\n    if (matchingFunction(list[i])) {\n      return i;\n    }\n  }\n\n  return -1;\n};\n/**\n * Returns a union of the included lists provided each element can be identified by a key.\n *\n * @param {Array} list - list of lists to get the union of\n * @param {Function} keyFunction - the function to use as a key for each element\n *\n * @return {Array} the union of the arrays\n */\n\nvar union = function union(lists, keyFunction) {\n  return values(lists.reduce(function (acc, list) {\n    list.forEach(function (el) {\n      acc[keyFunction(el)] = el;\n    });\n    return acc;\n  }, {}));\n};\n\nvar errors = {\n  INVALID_NUMBER_OF_PERIOD: 'INVALID_NUMBER_OF_PERIOD',\n  DASH_EMPTY_MANIFEST: 'DASH_EMPTY_MANIFEST',\n  DASH_INVALID_XML: 'DASH_INVALID_XML',\n  NO_BASE_URL: 'NO_BASE_URL',\n  MISSING_SEGMENT_INFORMATION: 'MISSING_SEGMENT_INFORMATION',\n  SEGMENT_TIME_UNSPECIFIED: 'SEGMENT_TIME_UNSPECIFIED',\n  UNSUPPORTED_UTC_TIMING_SCHEME: 'UNSUPPORTED_UTC_TIMING_SCHEME'\n};\n\n/**\n * @typedef {Object} SingleUri\n * @property {string} uri - relative location of segment\n * @property {string} resolvedUri - resolved location of segment\n * @property {Object} byterange - Object containing information on how to make byte range\n *   requests following byte-range-spec per RFC2616.\n * @property {String} byterange.length - length of range request\n * @property {String} byterange.offset - byte offset of range request\n *\n * @see https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35.1\n */\n\n/**\n * Converts a URLType node (5.3.9.2.3 Table 13) to a segment object\n * that conforms to how m3u8-parser is structured\n *\n * @see https://github.com/videojs/m3u8-parser\n *\n * @param {string} baseUrl - baseUrl provided by <BaseUrl> nodes\n * @param {string} source - source url for segment\n * @param {string} range - optional range used for range calls,\n *   follows  RFC 2616, Clause 14.35.1\n * @return {SingleUri} full segment information transformed into a format similar\n *   to m3u8-parser\n */\n\nvar urlTypeToSegment = function urlTypeToSegment(_ref) {\n  var _ref$baseUrl = _ref.baseUrl,\n      baseUrl = _ref$baseUrl === void 0 ? '' : _ref$baseUrl,\n      _ref$source = _ref.source,\n      source = _ref$source === void 0 ? '' : _ref$source,\n      _ref$range = _ref.range,\n      range = _ref$range === void 0 ? '' : _ref$range,\n      _ref$indexRange = _ref.indexRange,\n      indexRange = _ref$indexRange === void 0 ? '' : _ref$indexRange;\n  var segment = {\n    uri: source,\n    resolvedUri: resolveUrl(baseUrl || '', source)\n  };\n\n  if (range || indexRange) {\n    var rangeStr = range ? range : indexRange;\n    var ranges = rangeStr.split('-'); // default to parsing this as a BigInt if possible\n\n    var startRange = window.BigInt ? window.BigInt(ranges[0]) : parseInt(ranges[0], 10);\n    var endRange = window.BigInt ? window.BigInt(ranges[1]) : parseInt(ranges[1], 10); // convert back to a number if less than MAX_SAFE_INTEGER\n\n    if (startRange < Number.MAX_SAFE_INTEGER && typeof startRange === 'bigint') {\n      startRange = Number(startRange);\n    }\n\n    if (endRange < Number.MAX_SAFE_INTEGER && typeof endRange === 'bigint') {\n      endRange = Number(endRange);\n    }\n\n    var length;\n\n    if (typeof endRange === 'bigint' || typeof startRange === 'bigint') {\n      length = window.BigInt(endRange) - window.BigInt(startRange) + window.BigInt(1);\n    } else {\n      length = endRange - startRange + 1;\n    }\n\n    if (typeof length === 'bigint' && length < Number.MAX_SAFE_INTEGER) {\n      length = Number(length);\n    } // byterange should be inclusive according to\n    // RFC 2616, Clause 14.35.1\n\n\n    segment.byterange = {\n      length: length,\n      offset: startRange\n    };\n  }\n\n  return segment;\n};\nvar byteRangeToString = function byteRangeToString(byterange) {\n  // `endRange` is one less than `offset + length` because the HTTP range\n  // header uses inclusive ranges\n  var endRange;\n\n  if (typeof byterange.offset === 'bigint' || typeof byterange.length === 'bigint') {\n    endRange = window.BigInt(byterange.offset) + window.BigInt(byterange.length) - window.BigInt(1);\n  } else {\n    endRange = byterange.offset + byterange.length - 1;\n  }\n\n  return byterange.offset + \"-\" + endRange;\n};\n\n/**\n * parse the end number attribue that can be a string\n * number, or undefined.\n *\n * @param {string|number|undefined} endNumber\n *        The end number attribute.\n *\n * @return {number|null}\n *          The result of parsing the end number.\n */\n\nvar parseEndNumber = function parseEndNumber(endNumber) {\n  if (endNumber && typeof endNumber !== 'number') {\n    endNumber = parseInt(endNumber, 10);\n  }\n\n  if (isNaN(endNumber)) {\n    return null;\n  }\n\n  return endNumber;\n};\n/**\n * Functions for calculating the range of available segments in static and dynamic\n * manifests.\n */\n\n\nvar segmentRange = {\n  /**\n   * Returns the entire range of available segments for a static MPD\n   *\n   * @param {Object} attributes\n   *        Inheritied MPD attributes\n   * @return {{ start: number, end: number }}\n   *         The start and end numbers for available segments\n   */\n  static: function _static(attributes) {\n    var duration = attributes.duration,\n        _attributes$timescale = attributes.timescale,\n        timescale = _attributes$timescale === void 0 ? 1 : _attributes$timescale,\n        sourceDuration = attributes.sourceDuration,\n        periodDuration = attributes.periodDuration;\n    var endNumber = parseEndNumber(attributes.endNumber);\n    var segmentDuration = duration / timescale;\n\n    if (typeof endNumber === 'number') {\n      return {\n        start: 0,\n        end: endNumber\n      };\n    }\n\n    if (typeof periodDuration === 'number') {\n      return {\n        start: 0,\n        end: periodDuration / segmentDuration\n      };\n    }\n\n    return {\n      start: 0,\n      end: sourceDuration / segmentDuration\n    };\n  },\n\n  /**\n   * Returns the current live window range of available segments for a dynamic MPD\n   *\n   * @param {Object} attributes\n   *        Inheritied MPD attributes\n   * @return {{ start: number, end: number }}\n   *         The start and end numbers for available segments\n   */\n  dynamic: function dynamic(attributes) {\n    var NOW = attributes.NOW,\n        clientOffset = attributes.clientOffset,\n        availabilityStartTime = attributes.availabilityStartTime,\n        _attributes$timescale2 = attributes.timescale,\n        timescale = _attributes$timescale2 === void 0 ? 1 : _attributes$timescale2,\n        duration = attributes.duration,\n        _attributes$periodSta = attributes.periodStart,\n        periodStart = _attributes$periodSta === void 0 ? 0 : _attributes$periodSta,\n        _attributes$minimumUp = attributes.minimumUpdatePeriod,\n        minimumUpdatePeriod = _attributes$minimumUp === void 0 ? 0 : _attributes$minimumUp,\n        _attributes$timeShift = attributes.timeShiftBufferDepth,\n        timeShiftBufferDepth = _attributes$timeShift === void 0 ? Infinity : _attributes$timeShift;\n    var endNumber = parseEndNumber(attributes.endNumber); // clientOffset is passed in at the top level of mpd-parser and is an offset calculated\n    // after retrieving UTC server time.\n\n    var now = (NOW + clientOffset) / 1000; // WC stands for Wall Clock.\n    // Convert the period start time to EPOCH.\n\n    var periodStartWC = availabilityStartTime + periodStart; // Period end in EPOCH is manifest's retrieval time + time until next update.\n\n    var periodEndWC = now + minimumUpdatePeriod;\n    var periodDuration = periodEndWC - periodStartWC;\n    var segmentCount = Math.ceil(periodDuration * timescale / duration);\n    var availableStart = Math.floor((now - periodStartWC - timeShiftBufferDepth) * timescale / duration);\n    var availableEnd = Math.floor((now - periodStartWC) * timescale / duration);\n    return {\n      start: Math.max(0, availableStart),\n      end: typeof endNumber === 'number' ? endNumber : Math.min(segmentCount, availableEnd)\n    };\n  }\n};\n/**\n * Maps a range of numbers to objects with information needed to build the corresponding\n * segment list\n *\n * @name toSegmentsCallback\n * @function\n * @param {number} number\n *        Number of the segment\n * @param {number} index\n *        Index of the number in the range list\n * @return {{ number: Number, duration: Number, timeline: Number, time: Number }}\n *         Object with segment timing and duration info\n */\n\n/**\n * Returns a callback for Array.prototype.map for mapping a range of numbers to\n * information needed to build the segment list.\n *\n * @param {Object} attributes\n *        Inherited MPD attributes\n * @return {toSegmentsCallback}\n *         Callback map function\n */\n\nvar toSegments = function toSegments(attributes) {\n  return function (number) {\n    var duration = attributes.duration,\n        _attributes$timescale3 = attributes.timescale,\n        timescale = _attributes$timescale3 === void 0 ? 1 : _attributes$timescale3,\n        periodStart = attributes.periodStart,\n        _attributes$startNumb = attributes.startNumber,\n        startNumber = _attributes$startNumb === void 0 ? 1 : _attributes$startNumb;\n    return {\n      number: startNumber + number,\n      duration: duration / timescale,\n      timeline: periodStart,\n      time: number * duration\n    };\n  };\n};\n/**\n * Returns a list of objects containing segment timing and duration info used for\n * building the list of segments. This uses the @duration attribute specified\n * in the MPD manifest to derive the range of segments.\n *\n * @param {Object} attributes\n *        Inherited MPD attributes\n * @return {{number: number, duration: number, time: number, timeline: number}[]}\n *         List of Objects with segment timing and duration info\n */\n\nvar parseByDuration = function parseByDuration(attributes) {\n  var type = attributes.type,\n      duration = attributes.duration,\n      _attributes$timescale4 = attributes.timescale,\n      timescale = _attributes$timescale4 === void 0 ? 1 : _attributes$timescale4,\n      periodDuration = attributes.periodDuration,\n      sourceDuration = attributes.sourceDuration;\n\n  var _segmentRange$type = segmentRange[type](attributes),\n      start = _segmentRange$type.start,\n      end = _segmentRange$type.end;\n\n  var segments = range(start, end).map(toSegments(attributes));\n\n  if (type === 'static') {\n    var index = segments.length - 1; // section is either a period or the full source\n\n    var sectionDuration = typeof periodDuration === 'number' ? periodDuration : sourceDuration; // final segment may be less than full segment duration\n\n    segments[index].duration = sectionDuration - duration / timescale * index;\n  }\n\n  return segments;\n};\n\n/**\n * Translates SegmentBase into a set of segments.\n * (DASH SPEC Section 5.3.9.3.2) contains a set of <SegmentURL> nodes.  Each\n * node should be translated into segment.\n *\n * @param {Object} attributes\n *   Object containing all inherited attributes from parent elements with attribute\n *   names as keys\n * @return {Object.<Array>} list of segments\n */\n\nvar segmentsFromBase = function segmentsFromBase(attributes) {\n  var baseUrl = attributes.baseUrl,\n      _attributes$initializ = attributes.initialization,\n      initialization = _attributes$initializ === void 0 ? {} : _attributes$initializ,\n      sourceDuration = attributes.sourceDuration,\n      _attributes$indexRang = attributes.indexRange,\n      indexRange = _attributes$indexRang === void 0 ? '' : _attributes$indexRang,\n      periodStart = attributes.periodStart,\n      presentationTime = attributes.presentationTime,\n      _attributes$number = attributes.number,\n      number = _attributes$number === void 0 ? 0 : _attributes$number,\n      duration = attributes.duration; // base url is required for SegmentBase to work, per spec (Section 5.3.9.2.1)\n\n  if (!baseUrl) {\n    throw new Error(errors.NO_BASE_URL);\n  }\n\n  var initSegment = urlTypeToSegment({\n    baseUrl: baseUrl,\n    source: initialization.sourceURL,\n    range: initialization.range\n  });\n  var segment = urlTypeToSegment({\n    baseUrl: baseUrl,\n    source: baseUrl,\n    indexRange: indexRange\n  });\n  segment.map = initSegment; // If there is a duration, use it, otherwise use the given duration of the source\n  // (since SegmentBase is only for one total segment)\n\n  if (duration) {\n    var segmentTimeInfo = parseByDuration(attributes);\n\n    if (segmentTimeInfo.length) {\n      segment.duration = segmentTimeInfo[0].duration;\n      segment.timeline = segmentTimeInfo[0].timeline;\n    }\n  } else if (sourceDuration) {\n    segment.duration = sourceDuration;\n    segment.timeline = periodStart;\n  } // If presentation time is provided, these segments are being generated by SIDX\n  // references, and should use the time provided. For the general case of SegmentBase,\n  // there should only be one segment in the period, so its presentation time is the same\n  // as its period start.\n\n\n  segment.presentationTime = presentationTime || periodStart;\n  segment.number = number;\n  return [segment];\n};\n/**\n * Given a playlist, a sidx box, and a baseUrl, update the segment list of the playlist\n * according to the sidx information given.\n *\n * playlist.sidx has metadadata about the sidx where-as the sidx param\n * is the parsed sidx box itself.\n *\n * @param {Object} playlist the playlist to update the sidx information for\n * @param {Object} sidx the parsed sidx box\n * @return {Object} the playlist object with the updated sidx information\n */\n\nvar addSidxSegmentsToPlaylist$1 = function addSidxSegmentsToPlaylist(playlist, sidx, baseUrl) {\n  // Retain init segment information\n  var initSegment = playlist.sidx.map ? playlist.sidx.map : null; // Retain source duration from initial main manifest parsing\n\n  var sourceDuration = playlist.sidx.duration; // Retain source timeline\n\n  var timeline = playlist.timeline || 0;\n  var sidxByteRange = playlist.sidx.byterange;\n  var sidxEnd = sidxByteRange.offset + sidxByteRange.length; // Retain timescale of the parsed sidx\n\n  var timescale = sidx.timescale; // referenceType 1 refers to other sidx boxes\n\n  var mediaReferences = sidx.references.filter(function (r) {\n    return r.referenceType !== 1;\n  });\n  var segments = [];\n  var type = playlist.endList ? 'static' : 'dynamic';\n  var periodStart = playlist.sidx.timeline;\n  var presentationTime = periodStart;\n  var number = playlist.mediaSequence || 0; // firstOffset is the offset from the end of the sidx box\n\n  var startIndex; // eslint-disable-next-line\n\n  if (typeof sidx.firstOffset === 'bigint') {\n    startIndex = window.BigInt(sidxEnd) + sidx.firstOffset;\n  } else {\n    startIndex = sidxEnd + sidx.firstOffset;\n  }\n\n  for (var i = 0; i < mediaReferences.length; i++) {\n    var reference = sidx.references[i]; // size of the referenced (sub)segment\n\n    var size = reference.referencedSize; // duration of the referenced (sub)segment, in  the  timescale\n    // this will be converted to seconds when generating segments\n\n    var duration = reference.subsegmentDuration; // should be an inclusive range\n\n    var endIndex = void 0; // eslint-disable-next-line\n\n    if (typeof startIndex === 'bigint') {\n      endIndex = startIndex + window.BigInt(size) - window.BigInt(1);\n    } else {\n      endIndex = startIndex + size - 1;\n    }\n\n    var indexRange = startIndex + \"-\" + endIndex;\n    var attributes = {\n      baseUrl: baseUrl,\n      timescale: timescale,\n      timeline: timeline,\n      periodStart: periodStart,\n      presentationTime: presentationTime,\n      number: number,\n      duration: duration,\n      sourceDuration: sourceDuration,\n      indexRange: indexRange,\n      type: type\n    };\n    var segment = segmentsFromBase(attributes)[0];\n\n    if (initSegment) {\n      segment.map = initSegment;\n    }\n\n    segments.push(segment);\n\n    if (typeof startIndex === 'bigint') {\n      startIndex += window.BigInt(size);\n    } else {\n      startIndex += size;\n    }\n\n    presentationTime += duration / timescale;\n    number++;\n  }\n\n  playlist.segments = segments;\n  return playlist;\n};\n\nvar SUPPORTED_MEDIA_TYPES = ['AUDIO', 'SUBTITLES']; // allow one 60fps frame as leniency (arbitrarily chosen)\n\nvar TIME_FUDGE = 1 / 60;\n/**\n * Given a list of timelineStarts, combines, dedupes, and sorts them.\n *\n * @param {TimelineStart[]} timelineStarts - list of timeline starts\n *\n * @return {TimelineStart[]} the combined and deduped timeline starts\n */\n\nvar getUniqueTimelineStarts = function getUniqueTimelineStarts(timelineStarts) {\n  return union(timelineStarts, function (_ref) {\n    var timeline = _ref.timeline;\n    return timeline;\n  }).sort(function (a, b) {\n    return a.timeline > b.timeline ? 1 : -1;\n  });\n};\n/**\n * Finds the playlist with the matching NAME attribute.\n *\n * @param {Array} playlists - playlists to search through\n * @param {string} name - the NAME attribute to search for\n *\n * @return {Object|null} the matching playlist object, or null\n */\n\nvar findPlaylistWithName = function findPlaylistWithName(playlists, name) {\n  for (var i = 0; i < playlists.length; i++) {\n    if (playlists[i].attributes.NAME === name) {\n      return playlists[i];\n    }\n  }\n\n  return null;\n};\n/**\n * Gets a flattened array of media group playlists.\n *\n * @param {Object} manifest - the main manifest object\n *\n * @return {Array} the media group playlists\n */\n\nvar getMediaGroupPlaylists = function getMediaGroupPlaylists(manifest) {\n  var mediaGroupPlaylists = [];\n  forEachMediaGroup(manifest, SUPPORTED_MEDIA_TYPES, function (properties, type, group, label) {\n    mediaGroupPlaylists = mediaGroupPlaylists.concat(properties.playlists || []);\n  });\n  return mediaGroupPlaylists;\n};\n/**\n * Updates the playlist's media sequence numbers.\n *\n * @param {Object} config - options object\n * @param {Object} config.playlist - the playlist to update\n * @param {number} config.mediaSequence - the mediaSequence number to start with\n */\n\nvar updateMediaSequenceForPlaylist = function updateMediaSequenceForPlaylist(_ref2) {\n  var playlist = _ref2.playlist,\n      mediaSequence = _ref2.mediaSequence;\n  playlist.mediaSequence = mediaSequence;\n  playlist.segments.forEach(function (segment, index) {\n    segment.number = playlist.mediaSequence + index;\n  });\n};\n/**\n * Updates the media and discontinuity sequence numbers of newPlaylists given oldPlaylists\n * and a complete list of timeline starts.\n *\n * If no matching playlist is found, only the discontinuity sequence number of the playlist\n * will be updated.\n *\n * Since early available timelines are not supported, at least one segment must be present.\n *\n * @param {Object} config - options object\n * @param {Object[]} oldPlaylists - the old playlists to use as a reference\n * @param {Object[]} newPlaylists - the new playlists to update\n * @param {Object} timelineStarts - all timelineStarts seen in the stream to this point\n */\n\nvar updateSequenceNumbers = function updateSequenceNumbers(_ref3) {\n  var oldPlaylists = _ref3.oldPlaylists,\n      newPlaylists = _ref3.newPlaylists,\n      timelineStarts = _ref3.timelineStarts;\n  newPlaylists.forEach(function (playlist) {\n    playlist.discontinuitySequence = findIndex(timelineStarts, function (_ref4) {\n      var timeline = _ref4.timeline;\n      return timeline === playlist.timeline;\n    }); // Playlists NAMEs come from DASH Representation IDs, which are mandatory\n    // (see ISO_23009-1-2012 5.3.5.2).\n    //\n    // If the same Representation existed in a prior Period, it will retain the same NAME.\n\n    var oldPlaylist = findPlaylistWithName(oldPlaylists, playlist.attributes.NAME);\n\n    if (!oldPlaylist) {\n      // Since this is a new playlist, the media sequence values can start from 0 without\n      // consequence.\n      return;\n    } // TODO better support for live SIDX\n    //\n    // As of this writing, mpd-parser does not support multiperiod SIDX (in live or VOD).\n    // This is evident by a playlist only having a single SIDX reference. In a multiperiod\n    // playlist there would need to be multiple SIDX references. In addition, live SIDX is\n    // not supported when the SIDX properties change on refreshes.\n    //\n    // In the future, if support needs to be added, the merging logic here can be called\n    // after SIDX references are resolved. For now, exit early to prevent exceptions being\n    // thrown due to undefined references.\n\n\n    if (playlist.sidx) {\n      return;\n    } // Since we don't yet support early available timelines, we don't need to support\n    // playlists with no segments.\n\n\n    var firstNewSegment = playlist.segments[0];\n    var oldMatchingSegmentIndex = findIndex(oldPlaylist.segments, function (oldSegment) {\n      return Math.abs(oldSegment.presentationTime - firstNewSegment.presentationTime) < TIME_FUDGE;\n    }); // No matching segment from the old playlist means the entire playlist was refreshed.\n    // In this case the media sequence should account for this update, and the new segments\n    // should be marked as discontinuous from the prior content, since the last prior\n    // timeline was removed.\n\n    if (oldMatchingSegmentIndex === -1) {\n      updateMediaSequenceForPlaylist({\n        playlist: playlist,\n        mediaSequence: oldPlaylist.mediaSequence + oldPlaylist.segments.length\n      });\n      playlist.segments[0].discontinuity = true;\n      playlist.discontinuityStarts.unshift(0); // No matching segment does not necessarily mean there's missing content.\n      //\n      // If the new playlist's timeline is the same as the last seen segment's timeline,\n      // then a discontinuity can be added to identify that there's potentially missing\n      // content. If there's no missing content, the discontinuity should still be rather\n      // harmless. It's possible that if segment durations are accurate enough, that the\n      // existence of a gap can be determined using the presentation times and durations,\n      // but if the segment timing info is off, it may introduce more problems than simply\n      // adding the discontinuity.\n      //\n      // If the new playlist's timeline is different from the last seen segment's timeline,\n      // then a discontinuity can be added to identify that this is the first seen segment\n      // of a new timeline. However, the logic at the start of this function that\n      // determined the disconinuity sequence by timeline index is now off by one (the\n      // discontinuity of the newest timeline hasn't yet fallen off the manifest...since\n      // we added it), so the disconinuity sequence must be decremented.\n      //\n      // A period may also have a duration of zero, so the case of no segments is handled\n      // here even though we don't yet support early available periods.\n\n      if (!oldPlaylist.segments.length && playlist.timeline > oldPlaylist.timeline || oldPlaylist.segments.length && playlist.timeline > oldPlaylist.segments[oldPlaylist.segments.length - 1].timeline) {\n        playlist.discontinuitySequence--;\n      }\n\n      return;\n    } // If the first segment matched with a prior segment on a discontinuity (it's matching\n    // on the first segment of a period), then the discontinuitySequence shouldn't be the\n    // timeline's matching one, but instead should be the one prior, and the first segment\n    // of the new manifest should be marked with a discontinuity.\n    //\n    // The reason for this special case is that discontinuity sequence shows how many\n    // discontinuities have fallen off of the playlist, and discontinuities are marked on\n    // the first segment of a new \"timeline.\" Because of this, while DASH will retain that\n    // Period while the \"timeline\" exists, HLS keeps track of it via the discontinuity\n    // sequence, and that first segment is an indicator, but can be removed before that\n    // timeline is gone.\n\n\n    var oldMatchingSegment = oldPlaylist.segments[oldMatchingSegmentIndex];\n\n    if (oldMatchingSegment.discontinuity && !firstNewSegment.discontinuity) {\n      firstNewSegment.discontinuity = true;\n      playlist.discontinuityStarts.unshift(0);\n      playlist.discontinuitySequence--;\n    }\n\n    updateMediaSequenceForPlaylist({\n      playlist: playlist,\n      mediaSequence: oldPlaylist.segments[oldMatchingSegmentIndex].number\n    });\n  });\n};\n/**\n * Given an old parsed manifest object and a new parsed manifest object, updates the\n * sequence and timing values within the new manifest to ensure that it lines up with the\n * old.\n *\n * @param {Array} oldManifest - the old main manifest object\n * @param {Array} newManifest - the new main manifest object\n *\n * @return {Object} the updated new manifest object\n */\n\nvar positionManifestOnTimeline = function positionManifestOnTimeline(_ref5) {\n  var oldManifest = _ref5.oldManifest,\n      newManifest = _ref5.newManifest;\n  // Starting from v4.1.2 of the IOP, section 4.4.3.3 states:\n  //\n  // \"MPD@availabilityStartTime and Period@start shall not be changed over MPD updates.\"\n  //\n  // This was added from https://github.com/Dash-Industry-Forum/DASH-IF-IOP/issues/160\n  //\n  // Because of this change, and the difficulty of supporting periods with changing start\n  // times, periods with changing start times are not supported. This makes the logic much\n  // simpler, since periods with the same start time can be considerred the same period\n  // across refreshes.\n  //\n  // To give an example as to the difficulty of handling periods where the start time may\n  // change, if a single period manifest is refreshed with another manifest with a single\n  // period, and both the start and end times are increased, then the only way to determine\n  // if it's a new period or an old one that has changed is to look through the segments of\n  // each playlist and determine the presentation time bounds to find a match. In addition,\n  // if the period start changed to exceed the old period end, then there would be no\n  // match, and it would not be possible to determine whether the refreshed period is a new\n  // one or the old one.\n  var oldPlaylists = oldManifest.playlists.concat(getMediaGroupPlaylists(oldManifest));\n  var newPlaylists = newManifest.playlists.concat(getMediaGroupPlaylists(newManifest)); // Save all seen timelineStarts to the new manifest. Although this potentially means that\n  // there's a \"memory leak\" in that it will never stop growing, in reality, only a couple\n  // of properties are saved for each seen Period. Even long running live streams won't\n  // generate too many Periods, unless the stream is watched for decades. In the future,\n  // this can be optimized by mapping to discontinuity sequence numbers for each timeline,\n  // but it may not become an issue, and the additional info can be useful for debugging.\n\n  newManifest.timelineStarts = getUniqueTimelineStarts([oldManifest.timelineStarts, newManifest.timelineStarts]);\n  updateSequenceNumbers({\n    oldPlaylists: oldPlaylists,\n    newPlaylists: newPlaylists,\n    timelineStarts: newManifest.timelineStarts\n  });\n  return newManifest;\n};\n\nvar generateSidxKey = function generateSidxKey(sidx) {\n  return sidx && sidx.uri + '-' + byteRangeToString(sidx.byterange);\n};\n\nvar mergeDiscontiguousPlaylists = function mergeDiscontiguousPlaylists(playlists) {\n  var mergedPlaylists = values(playlists.reduce(function (acc, playlist) {\n    // assuming playlist IDs are the same across periods\n    // TODO: handle multiperiod where representation sets are not the same\n    // across periods\n    var name = playlist.attributes.id + (playlist.attributes.lang || '');\n\n    if (!acc[name]) {\n      // First Period\n      acc[name] = playlist;\n      acc[name].attributes.timelineStarts = [];\n    } else {\n      // Subsequent Periods\n      if (playlist.segments) {\n        var _acc$name$segments;\n\n        // first segment of subsequent periods signal a discontinuity\n        if (playlist.segments[0]) {\n          playlist.segments[0].discontinuity = true;\n        }\n\n        (_acc$name$segments = acc[name].segments).push.apply(_acc$name$segments, playlist.segments);\n      } // bubble up contentProtection, this assumes all DRM content\n      // has the same contentProtection\n\n\n      if (playlist.attributes.contentProtection) {\n        acc[name].attributes.contentProtection = playlist.attributes.contentProtection;\n      }\n    }\n\n    acc[name].attributes.timelineStarts.push({\n      // Although they represent the same number, it's important to have both to make it\n      // compatible with HLS potentially having a similar attribute.\n      start: playlist.attributes.periodStart,\n      timeline: playlist.attributes.periodStart\n    });\n    return acc;\n  }, {}));\n  return mergedPlaylists.map(function (playlist) {\n    playlist.discontinuityStarts = findIndexes(playlist.segments || [], 'discontinuity');\n    return playlist;\n  });\n};\n\nvar addSidxSegmentsToPlaylist = function addSidxSegmentsToPlaylist(playlist, sidxMapping) {\n  var sidxKey = generateSidxKey(playlist.sidx);\n  var sidxMatch = sidxKey && sidxMapping[sidxKey] && sidxMapping[sidxKey].sidx;\n\n  if (sidxMatch) {\n    addSidxSegmentsToPlaylist$1(playlist, sidxMatch, playlist.sidx.resolvedUri);\n  }\n\n  return playlist;\n};\nvar addSidxSegmentsToPlaylists = function addSidxSegmentsToPlaylists(playlists, sidxMapping) {\n  if (sidxMapping === void 0) {\n    sidxMapping = {};\n  }\n\n  if (!Object.keys(sidxMapping).length) {\n    return playlists;\n  }\n\n  for (var i in playlists) {\n    playlists[i] = addSidxSegmentsToPlaylist(playlists[i], sidxMapping);\n  }\n\n  return playlists;\n};\nvar formatAudioPlaylist = function formatAudioPlaylist(_ref, isAudioOnly) {\n  var _attributes;\n\n  var attributes = _ref.attributes,\n      segments = _ref.segments,\n      sidx = _ref.sidx,\n      mediaSequence = _ref.mediaSequence,\n      discontinuitySequence = _ref.discontinuitySequence,\n      discontinuityStarts = _ref.discontinuityStarts;\n  var playlist = {\n    attributes: (_attributes = {\n      NAME: attributes.id,\n      BANDWIDTH: attributes.bandwidth,\n      CODECS: attributes.codecs\n    }, _attributes['PROGRAM-ID'] = 1, _attributes),\n    uri: '',\n    endList: attributes.type === 'static',\n    timeline: attributes.periodStart,\n    resolvedUri: '',\n    targetDuration: attributes.duration,\n    discontinuitySequence: discontinuitySequence,\n    discontinuityStarts: discontinuityStarts,\n    timelineStarts: attributes.timelineStarts,\n    mediaSequence: mediaSequence,\n    segments: segments\n  };\n\n  if (attributes.contentProtection) {\n    playlist.contentProtection = attributes.contentProtection;\n  }\n\n  if (sidx) {\n    playlist.sidx = sidx;\n  }\n\n  if (isAudioOnly) {\n    playlist.attributes.AUDIO = 'audio';\n    playlist.attributes.SUBTITLES = 'subs';\n  }\n\n  return playlist;\n};\nvar formatVttPlaylist = function formatVttPlaylist(_ref2) {\n  var _m3u8Attributes;\n\n  var attributes = _ref2.attributes,\n      segments = _ref2.segments,\n      mediaSequence = _ref2.mediaSequence,\n      discontinuityStarts = _ref2.discontinuityStarts,\n      discontinuitySequence = _ref2.discontinuitySequence;\n\n  if (typeof segments === 'undefined') {\n    // vtt tracks may use single file in BaseURL\n    segments = [{\n      uri: attributes.baseUrl,\n      timeline: attributes.periodStart,\n      resolvedUri: attributes.baseUrl || '',\n      duration: attributes.sourceDuration,\n      number: 0\n    }]; // targetDuration should be the same duration as the only segment\n\n    attributes.duration = attributes.sourceDuration;\n  }\n\n  var m3u8Attributes = (_m3u8Attributes = {\n    NAME: attributes.id,\n    BANDWIDTH: attributes.bandwidth\n  }, _m3u8Attributes['PROGRAM-ID'] = 1, _m3u8Attributes);\n\n  if (attributes.codecs) {\n    m3u8Attributes.CODECS = attributes.codecs;\n  }\n\n  return {\n    attributes: m3u8Attributes,\n    uri: '',\n    endList: attributes.type === 'static',\n    timeline: attributes.periodStart,\n    resolvedUri: attributes.baseUrl || '',\n    targetDuration: attributes.duration,\n    timelineStarts: attributes.timelineStarts,\n    discontinuityStarts: discontinuityStarts,\n    discontinuitySequence: discontinuitySequence,\n    mediaSequence: mediaSequence,\n    segments: segments\n  };\n};\nvar organizeAudioPlaylists = function organizeAudioPlaylists(playlists, sidxMapping, isAudioOnly) {\n  if (sidxMapping === void 0) {\n    sidxMapping = {};\n  }\n\n  if (isAudioOnly === void 0) {\n    isAudioOnly = false;\n  }\n\n  var mainPlaylist;\n  var formattedPlaylists = playlists.reduce(function (a, playlist) {\n    var role = playlist.attributes.role && playlist.attributes.role.value || '';\n    var language = playlist.attributes.lang || '';\n    var label = playlist.attributes.label || 'main';\n\n    if (language && !playlist.attributes.label) {\n      var roleLabel = role ? \" (\" + role + \")\" : '';\n      label = \"\" + playlist.attributes.lang + roleLabel;\n    }\n\n    if (!a[label]) {\n      a[label] = {\n        language: language,\n        autoselect: true,\n        default: role === 'main',\n        playlists: [],\n        uri: ''\n      };\n    }\n\n    var formatted = addSidxSegmentsToPlaylist(formatAudioPlaylist(playlist, isAudioOnly), sidxMapping);\n    a[label].playlists.push(formatted);\n\n    if (typeof mainPlaylist === 'undefined' && role === 'main') {\n      mainPlaylist = playlist;\n      mainPlaylist.default = true;\n    }\n\n    return a;\n  }, {}); // if no playlists have role \"main\", mark the first as main\n\n  if (!mainPlaylist) {\n    var firstLabel = Object.keys(formattedPlaylists)[0];\n    formattedPlaylists[firstLabel].default = true;\n  }\n\n  return formattedPlaylists;\n};\nvar organizeVttPlaylists = function organizeVttPlaylists(playlists, sidxMapping) {\n  if (sidxMapping === void 0) {\n    sidxMapping = {};\n  }\n\n  return playlists.reduce(function (a, playlist) {\n    var label = playlist.attributes.lang || 'text';\n\n    if (!a[label]) {\n      a[label] = {\n        language: label,\n        default: false,\n        autoselect: false,\n        playlists: [],\n        uri: ''\n      };\n    }\n\n    a[label].playlists.push(addSidxSegmentsToPlaylist(formatVttPlaylist(playlist), sidxMapping));\n    return a;\n  }, {});\n};\n\nvar organizeCaptionServices = function organizeCaptionServices(captionServices) {\n  return captionServices.reduce(function (svcObj, svc) {\n    if (!svc) {\n      return svcObj;\n    }\n\n    svc.forEach(function (service) {\n      var channel = service.channel,\n          language = service.language;\n      svcObj[language] = {\n        autoselect: false,\n        default: false,\n        instreamId: channel,\n        language: language\n      };\n\n      if (service.hasOwnProperty('aspectRatio')) {\n        svcObj[language].aspectRatio = service.aspectRatio;\n      }\n\n      if (service.hasOwnProperty('easyReader')) {\n        svcObj[language].easyReader = service.easyReader;\n      }\n\n      if (service.hasOwnProperty('3D')) {\n        svcObj[language]['3D'] = service['3D'];\n      }\n    });\n    return svcObj;\n  }, {});\n};\n\nvar formatVideoPlaylist = function formatVideoPlaylist(_ref3) {\n  var _attributes2;\n\n  var attributes = _ref3.attributes,\n      segments = _ref3.segments,\n      sidx = _ref3.sidx,\n      discontinuityStarts = _ref3.discontinuityStarts;\n  var playlist = {\n    attributes: (_attributes2 = {\n      NAME: attributes.id,\n      AUDIO: 'audio',\n      SUBTITLES: 'subs',\n      RESOLUTION: {\n        width: attributes.width,\n        height: attributes.height\n      },\n      CODECS: attributes.codecs,\n      BANDWIDTH: attributes.bandwidth\n    }, _attributes2['PROGRAM-ID'] = 1, _attributes2),\n    uri: '',\n    endList: attributes.type === 'static',\n    timeline: attributes.periodStart,\n    resolvedUri: '',\n    targetDuration: attributes.duration,\n    discontinuityStarts: discontinuityStarts,\n    timelineStarts: attributes.timelineStarts,\n    segments: segments\n  };\n\n  if (attributes.contentProtection) {\n    playlist.contentProtection = attributes.contentProtection;\n  }\n\n  if (sidx) {\n    playlist.sidx = sidx;\n  }\n\n  return playlist;\n};\n\nvar videoOnly = function videoOnly(_ref4) {\n  var attributes = _ref4.attributes;\n  return attributes.mimeType === 'video/mp4' || attributes.mimeType === 'video/webm' || attributes.contentType === 'video';\n};\n\nvar audioOnly = function audioOnly(_ref5) {\n  var attributes = _ref5.attributes;\n  return attributes.mimeType === 'audio/mp4' || attributes.mimeType === 'audio/webm' || attributes.contentType === 'audio';\n};\n\nvar vttOnly = function vttOnly(_ref6) {\n  var attributes = _ref6.attributes;\n  return attributes.mimeType === 'text/vtt' || attributes.contentType === 'text';\n};\n/**\n * Contains start and timeline properties denoting a timeline start. For DASH, these will\n * be the same number.\n *\n * @typedef {Object} TimelineStart\n * @property {number} start - the start time of the timeline\n * @property {number} timeline - the timeline number\n */\n\n/**\n * Adds appropriate media and discontinuity sequence values to the segments and playlists.\n *\n * Throughout mpd-parser, the `number` attribute is used in relation to `startNumber`, a\n * DASH specific attribute used in constructing segment URI's from templates. However, from\n * an HLS perspective, the `number` attribute on a segment would be its `mediaSequence`\n * value, which should start at the original media sequence value (or 0) and increment by 1\n * for each segment thereafter. Since DASH's `startNumber` values are independent per\n * period, it doesn't make sense to use it for `number`. Instead, assume everything starts\n * from a 0 mediaSequence value and increment from there.\n *\n * Note that VHS currently doesn't use the `number` property, but it can be helpful for\n * debugging and making sense of the manifest.\n *\n * For live playlists, to account for values increasing in manifests when periods are\n * removed on refreshes, merging logic should be used to update the numbers to their\n * appropriate values (to ensure they're sequential and increasing).\n *\n * @param {Object[]} playlists - the playlists to update\n * @param {TimelineStart[]} timelineStarts - the timeline starts for the manifest\n */\n\n\nvar addMediaSequenceValues = function addMediaSequenceValues(playlists, timelineStarts) {\n  // increment all segments sequentially\n  playlists.forEach(function (playlist) {\n    playlist.mediaSequence = 0;\n    playlist.discontinuitySequence = findIndex(timelineStarts, function (_ref7) {\n      var timeline = _ref7.timeline;\n      return timeline === playlist.timeline;\n    });\n\n    if (!playlist.segments) {\n      return;\n    }\n\n    playlist.segments.forEach(function (segment, index) {\n      segment.number = index;\n    });\n  });\n};\n/**\n * Given a media group object, flattens all playlists within the media group into a single\n * array.\n *\n * @param {Object} mediaGroupObject - the media group object\n *\n * @return {Object[]}\n *         The media group playlists\n */\n\nvar flattenMediaGroupPlaylists = function flattenMediaGroupPlaylists(mediaGroupObject) {\n  if (!mediaGroupObject) {\n    return [];\n  }\n\n  return Object.keys(mediaGroupObject).reduce(function (acc, label) {\n    var labelContents = mediaGroupObject[label];\n    return acc.concat(labelContents.playlists);\n  }, []);\n};\nvar toM3u8 = function toM3u8(_ref8) {\n  var _mediaGroups;\n\n  var dashPlaylists = _ref8.dashPlaylists,\n      locations = _ref8.locations,\n      _ref8$sidxMapping = _ref8.sidxMapping,\n      sidxMapping = _ref8$sidxMapping === void 0 ? {} : _ref8$sidxMapping,\n      previousManifest = _ref8.previousManifest;\n\n  if (!dashPlaylists.length) {\n    return {};\n  } // grab all main manifest attributes\n\n\n  var _dashPlaylists$0$attr = dashPlaylists[0].attributes,\n      duration = _dashPlaylists$0$attr.sourceDuration,\n      type = _dashPlaylists$0$attr.type,\n      suggestedPresentationDelay = _dashPlaylists$0$attr.suggestedPresentationDelay,\n      minimumUpdatePeriod = _dashPlaylists$0$attr.minimumUpdatePeriod;\n  var videoPlaylists = mergeDiscontiguousPlaylists(dashPlaylists.filter(videoOnly)).map(formatVideoPlaylist);\n  var audioPlaylists = mergeDiscontiguousPlaylists(dashPlaylists.filter(audioOnly));\n  var vttPlaylists = mergeDiscontiguousPlaylists(dashPlaylists.filter(vttOnly));\n  var captions = dashPlaylists.map(function (playlist) {\n    return playlist.attributes.captionServices;\n  }).filter(Boolean);\n  var manifest = {\n    allowCache: true,\n    discontinuityStarts: [],\n    segments: [],\n    endList: true,\n    mediaGroups: (_mediaGroups = {\n      AUDIO: {},\n      VIDEO: {}\n    }, _mediaGroups['CLOSED-CAPTIONS'] = {}, _mediaGroups.SUBTITLES = {}, _mediaGroups),\n    uri: '',\n    duration: duration,\n    playlists: addSidxSegmentsToPlaylists(videoPlaylists, sidxMapping)\n  };\n\n  if (minimumUpdatePeriod >= 0) {\n    manifest.minimumUpdatePeriod = minimumUpdatePeriod * 1000;\n  }\n\n  if (locations) {\n    manifest.locations = locations;\n  }\n\n  if (type === 'dynamic') {\n    manifest.suggestedPresentationDelay = suggestedPresentationDelay;\n  }\n\n  var isAudioOnly = manifest.playlists.length === 0;\n  var organizedAudioGroup = audioPlaylists.length ? organizeAudioPlaylists(audioPlaylists, sidxMapping, isAudioOnly) : null;\n  var organizedVttGroup = vttPlaylists.length ? organizeVttPlaylists(vttPlaylists, sidxMapping) : null;\n  var formattedPlaylists = videoPlaylists.concat(flattenMediaGroupPlaylists(organizedAudioGroup), flattenMediaGroupPlaylists(organizedVttGroup));\n  var playlistTimelineStarts = formattedPlaylists.map(function (_ref9) {\n    var timelineStarts = _ref9.timelineStarts;\n    return timelineStarts;\n  });\n  manifest.timelineStarts = getUniqueTimelineStarts(playlistTimelineStarts);\n  addMediaSequenceValues(formattedPlaylists, manifest.timelineStarts);\n\n  if (organizedAudioGroup) {\n    manifest.mediaGroups.AUDIO.audio = organizedAudioGroup;\n  }\n\n  if (organizedVttGroup) {\n    manifest.mediaGroups.SUBTITLES.subs = organizedVttGroup;\n  }\n\n  if (captions.length) {\n    manifest.mediaGroups['CLOSED-CAPTIONS'].cc = organizeCaptionServices(captions);\n  }\n\n  if (previousManifest) {\n    return positionManifestOnTimeline({\n      oldManifest: previousManifest,\n      newManifest: manifest\n    });\n  }\n\n  return manifest;\n};\n\n/**\n * Calculates the R (repetition) value for a live stream (for the final segment\n * in a manifest where the r value is negative 1)\n *\n * @param {Object} attributes\n *        Object containing all inherited attributes from parent elements with attribute\n *        names as keys\n * @param {number} time\n *        current time (typically the total time up until the final segment)\n * @param {number} duration\n *        duration property for the given <S />\n *\n * @return {number}\n *        R value to reach the end of the given period\n */\nvar getLiveRValue = function getLiveRValue(attributes, time, duration) {\n  var NOW = attributes.NOW,\n      clientOffset = attributes.clientOffset,\n      availabilityStartTime = attributes.availabilityStartTime,\n      _attributes$timescale = attributes.timescale,\n      timescale = _attributes$timescale === void 0 ? 1 : _attributes$timescale,\n      _attributes$periodSta = attributes.periodStart,\n      periodStart = _attributes$periodSta === void 0 ? 0 : _attributes$periodSta,\n      _attributes$minimumUp = attributes.minimumUpdatePeriod,\n      minimumUpdatePeriod = _attributes$minimumUp === void 0 ? 0 : _attributes$minimumUp;\n  var now = (NOW + clientOffset) / 1000;\n  var periodStartWC = availabilityStartTime + periodStart;\n  var periodEndWC = now + minimumUpdatePeriod;\n  var periodDuration = periodEndWC - periodStartWC;\n  return Math.ceil((periodDuration * timescale - time) / duration);\n};\n/**\n * Uses information provided by SegmentTemplate.SegmentTimeline to determine segment\n * timing and duration\n *\n * @param {Object} attributes\n *        Object containing all inherited attributes from parent elements with attribute\n *        names as keys\n * @param {Object[]} segmentTimeline\n *        List of objects representing the attributes of each S element contained within\n *\n * @return {{number: number, duration: number, time: number, timeline: number}[]}\n *         List of Objects with segment timing and duration info\n */\n\n\nvar parseByTimeline = function parseByTimeline(attributes, segmentTimeline) {\n  var type = attributes.type,\n      _attributes$minimumUp2 = attributes.minimumUpdatePeriod,\n      minimumUpdatePeriod = _attributes$minimumUp2 === void 0 ? 0 : _attributes$minimumUp2,\n      _attributes$media = attributes.media,\n      media = _attributes$media === void 0 ? '' : _attributes$media,\n      sourceDuration = attributes.sourceDuration,\n      _attributes$timescale2 = attributes.timescale,\n      timescale = _attributes$timescale2 === void 0 ? 1 : _attributes$timescale2,\n      _attributes$startNumb = attributes.startNumber,\n      startNumber = _attributes$startNumb === void 0 ? 1 : _attributes$startNumb,\n      timeline = attributes.periodStart;\n  var segments = [];\n  var time = -1;\n\n  for (var sIndex = 0; sIndex < segmentTimeline.length; sIndex++) {\n    var S = segmentTimeline[sIndex];\n    var duration = S.d;\n    var repeat = S.r || 0;\n    var segmentTime = S.t || 0;\n\n    if (time < 0) {\n      // first segment\n      time = segmentTime;\n    }\n\n    if (segmentTime && segmentTime > time) {\n      // discontinuity\n      // TODO: How to handle this type of discontinuity\n      // timeline++ here would treat it like HLS discontuity and content would\n      // get appended without gap\n      // E.G.\n      //  <S t=\"0\" d=\"1\" />\n      //  <S d=\"1\" />\n      //  <S d=\"1\" />\n      //  <S t=\"5\" d=\"1\" />\n      // would have $Time$ values of [0, 1, 2, 5]\n      // should this be appened at time positions [0, 1, 2, 3],(#EXT-X-DISCONTINUITY)\n      // or [0, 1, 2, gap, gap, 5]? (#EXT-X-GAP)\n      // does the value of sourceDuration consider this when calculating arbitrary\n      // negative @r repeat value?\n      // E.G. Same elements as above with this added at the end\n      //  <S d=\"1\" r=\"-1\" />\n      //  with a sourceDuration of 10\n      // Would the 2 gaps be included in the time duration calculations resulting in\n      // 8 segments with $Time$ values of [0, 1, 2, 5, 6, 7, 8, 9] or 10 segments\n      // with $Time$ values of [0, 1, 2, 5, 6, 7, 8, 9, 10, 11] ?\n      time = segmentTime;\n    }\n\n    var count = void 0;\n\n    if (repeat < 0) {\n      var nextS = sIndex + 1;\n\n      if (nextS === segmentTimeline.length) {\n        // last segment\n        if (type === 'dynamic' && minimumUpdatePeriod > 0 && media.indexOf('$Number$') > 0) {\n          count = getLiveRValue(attributes, time, duration);\n        } else {\n          // TODO: This may be incorrect depending on conclusion of TODO above\n          count = (sourceDuration * timescale - time) / duration;\n        }\n      } else {\n        count = (segmentTimeline[nextS].t - time) / duration;\n      }\n    } else {\n      count = repeat + 1;\n    }\n\n    var end = startNumber + segments.length + count;\n    var number = startNumber + segments.length;\n\n    while (number < end) {\n      segments.push({\n        number: number,\n        duration: duration / timescale,\n        time: time,\n        timeline: timeline\n      });\n      time += duration;\n      number++;\n    }\n  }\n\n  return segments;\n};\n\nvar identifierPattern = /\\$([A-z]*)(?:(%0)([0-9]+)d)?\\$/g;\n/**\n * Replaces template identifiers with corresponding values. To be used as the callback\n * for String.prototype.replace\n *\n * @name replaceCallback\n * @function\n * @param {string} match\n *        Entire match of identifier\n * @param {string} identifier\n *        Name of matched identifier\n * @param {string} format\n *        Format tag string. Its presence indicates that padding is expected\n * @param {string} width\n *        Desired length of the replaced value. Values less than this width shall be left\n *        zero padded\n * @return {string}\n *         Replacement for the matched identifier\n */\n\n/**\n * Returns a function to be used as a callback for String.prototype.replace to replace\n * template identifiers\n *\n * @param {Obect} values\n *        Object containing values that shall be used to replace known identifiers\n * @param {number} values.RepresentationID\n *        Value of the Representation@id attribute\n * @param {number} values.Number\n *        Number of the corresponding segment\n * @param {number} values.Bandwidth\n *        Value of the Representation@bandwidth attribute.\n * @param {number} values.Time\n *        Timestamp value of the corresponding segment\n * @return {replaceCallback}\n *         Callback to be used with String.prototype.replace to replace identifiers\n */\n\nvar identifierReplacement = function identifierReplacement(values) {\n  return function (match, identifier, format, width) {\n    if (match === '$$') {\n      // escape sequence\n      return '$';\n    }\n\n    if (typeof values[identifier] === 'undefined') {\n      return match;\n    }\n\n    var value = '' + values[identifier];\n\n    if (identifier === 'RepresentationID') {\n      // Format tag shall not be present with RepresentationID\n      return value;\n    }\n\n    if (!format) {\n      width = 1;\n    } else {\n      width = parseInt(width, 10);\n    }\n\n    if (value.length >= width) {\n      return value;\n    }\n\n    return \"\" + new Array(width - value.length + 1).join('0') + value;\n  };\n};\n/**\n * Constructs a segment url from a template string\n *\n * @param {string} url\n *        Template string to construct url from\n * @param {Obect} values\n *        Object containing values that shall be used to replace known identifiers\n * @param {number} values.RepresentationID\n *        Value of the Representation@id attribute\n * @param {number} values.Number\n *        Number of the corresponding segment\n * @param {number} values.Bandwidth\n *        Value of the Representation@bandwidth attribute.\n * @param {number} values.Time\n *        Timestamp value of the corresponding segment\n * @return {string}\n *         Segment url with identifiers replaced\n */\n\nvar constructTemplateUrl = function constructTemplateUrl(url, values) {\n  return url.replace(identifierPattern, identifierReplacement(values));\n};\n/**\n * Generates a list of objects containing timing and duration information about each\n * segment needed to generate segment uris and the complete segment object\n *\n * @param {Object} attributes\n *        Object containing all inherited attributes from parent elements with attribute\n *        names as keys\n * @param {Object[]|undefined} segmentTimeline\n *        List of objects representing the attributes of each S element contained within\n *        the SegmentTimeline element\n * @return {{number: number, duration: number, time: number, timeline: number}[]}\n *         List of Objects with segment timing and duration info\n */\n\nvar parseTemplateInfo = function parseTemplateInfo(attributes, segmentTimeline) {\n  if (!attributes.duration && !segmentTimeline) {\n    // if neither @duration or SegmentTimeline are present, then there shall be exactly\n    // one media segment\n    return [{\n      number: attributes.startNumber || 1,\n      duration: attributes.sourceDuration,\n      time: 0,\n      timeline: attributes.periodStart\n    }];\n  }\n\n  if (attributes.duration) {\n    return parseByDuration(attributes);\n  }\n\n  return parseByTimeline(attributes, segmentTimeline);\n};\n/**\n * Generates a list of segments using information provided by the SegmentTemplate element\n *\n * @param {Object} attributes\n *        Object containing all inherited attributes from parent elements with attribute\n *        names as keys\n * @param {Object[]|undefined} segmentTimeline\n *        List of objects representing the attributes of each S element contained within\n *        the SegmentTimeline element\n * @return {Object[]}\n *         List of segment objects\n */\n\nvar segmentsFromTemplate = function segmentsFromTemplate(attributes, segmentTimeline) {\n  var templateValues = {\n    RepresentationID: attributes.id,\n    Bandwidth: attributes.bandwidth || 0\n  };\n  var _attributes$initializ = attributes.initialization,\n      initialization = _attributes$initializ === void 0 ? {\n    sourceURL: '',\n    range: ''\n  } : _attributes$initializ;\n  var mapSegment = urlTypeToSegment({\n    baseUrl: attributes.baseUrl,\n    source: constructTemplateUrl(initialization.sourceURL, templateValues),\n    range: initialization.range\n  });\n  var segments = parseTemplateInfo(attributes, segmentTimeline);\n  return segments.map(function (segment) {\n    templateValues.Number = segment.number;\n    templateValues.Time = segment.time;\n    var uri = constructTemplateUrl(attributes.media || '', templateValues); // See DASH spec section 5.3.9.2.2\n    // - if timescale isn't present on any level, default to 1.\n\n    var timescale = attributes.timescale || 1; // - if presentationTimeOffset isn't present on any level, default to 0\n\n    var presentationTimeOffset = attributes.presentationTimeOffset || 0;\n    var presentationTime = // Even if the @t attribute is not specified for the segment, segment.time is\n    // calculated in mpd-parser prior to this, so it's assumed to be available.\n    attributes.periodStart + (segment.time - presentationTimeOffset) / timescale;\n    var map = {\n      uri: uri,\n      timeline: segment.timeline,\n      duration: segment.duration,\n      resolvedUri: resolveUrl(attributes.baseUrl || '', uri),\n      map: mapSegment,\n      number: segment.number,\n      presentationTime: presentationTime\n    };\n    return map;\n  });\n};\n\n/**\n * Converts a <SegmentUrl> (of type URLType from the DASH spec 5.3.9.2 Table 14)\n * to an object that matches the output of a segment in videojs/mpd-parser\n *\n * @param {Object} attributes\n *   Object containing all inherited attributes from parent elements with attribute\n *   names as keys\n * @param {Object} segmentUrl\n *   <SegmentURL> node to translate into a segment object\n * @return {Object} translated segment object\n */\n\nvar SegmentURLToSegmentObject = function SegmentURLToSegmentObject(attributes, segmentUrl) {\n  var baseUrl = attributes.baseUrl,\n      _attributes$initializ = attributes.initialization,\n      initialization = _attributes$initializ === void 0 ? {} : _attributes$initializ;\n  var initSegment = urlTypeToSegment({\n    baseUrl: baseUrl,\n    source: initialization.sourceURL,\n    range: initialization.range\n  });\n  var segment = urlTypeToSegment({\n    baseUrl: baseUrl,\n    source: segmentUrl.media,\n    range: segmentUrl.mediaRange\n  });\n  segment.map = initSegment;\n  return segment;\n};\n/**\n * Generates a list of segments using information provided by the SegmentList element\n * SegmentList (DASH SPEC Section 5.3.9.3.2) contains a set of <SegmentURL> nodes.  Each\n * node should be translated into segment.\n *\n * @param {Object} attributes\n *   Object containing all inherited attributes from parent elements with attribute\n *   names as keys\n * @param {Object[]|undefined} segmentTimeline\n *        List of objects representing the attributes of each S element contained within\n *        the SegmentTimeline element\n * @return {Object.<Array>} list of segments\n */\n\n\nvar segmentsFromList = function segmentsFromList(attributes, segmentTimeline) {\n  var duration = attributes.duration,\n      _attributes$segmentUr = attributes.segmentUrls,\n      segmentUrls = _attributes$segmentUr === void 0 ? [] : _attributes$segmentUr,\n      periodStart = attributes.periodStart; // Per spec (5.3.9.2.1) no way to determine segment duration OR\n  // if both SegmentTimeline and @duration are defined, it is outside of spec.\n\n  if (!duration && !segmentTimeline || duration && segmentTimeline) {\n    throw new Error(errors.SEGMENT_TIME_UNSPECIFIED);\n  }\n\n  var segmentUrlMap = segmentUrls.map(function (segmentUrlObject) {\n    return SegmentURLToSegmentObject(attributes, segmentUrlObject);\n  });\n  var segmentTimeInfo;\n\n  if (duration) {\n    segmentTimeInfo = parseByDuration(attributes);\n  }\n\n  if (segmentTimeline) {\n    segmentTimeInfo = parseByTimeline(attributes, segmentTimeline);\n  }\n\n  var segments = segmentTimeInfo.map(function (segmentTime, index) {\n    if (segmentUrlMap[index]) {\n      var segment = segmentUrlMap[index]; // See DASH spec section 5.3.9.2.2\n      // - if timescale isn't present on any level, default to 1.\n\n      var timescale = attributes.timescale || 1; // - if presentationTimeOffset isn't present on any level, default to 0\n\n      var presentationTimeOffset = attributes.presentationTimeOffset || 0;\n      segment.timeline = segmentTime.timeline;\n      segment.duration = segmentTime.duration;\n      segment.number = segmentTime.number;\n      segment.presentationTime = periodStart + (segmentTime.time - presentationTimeOffset) / timescale;\n      return segment;\n    } // Since we're mapping we should get rid of any blank segments (in case\n    // the given SegmentTimeline is handling for more elements than we have\n    // SegmentURLs for).\n\n  }).filter(function (segment) {\n    return segment;\n  });\n  return segments;\n};\n\nvar generateSegments = function generateSegments(_ref) {\n  var attributes = _ref.attributes,\n      segmentInfo = _ref.segmentInfo;\n  var segmentAttributes;\n  var segmentsFn;\n\n  if (segmentInfo.template) {\n    segmentsFn = segmentsFromTemplate;\n    segmentAttributes = merge(attributes, segmentInfo.template);\n  } else if (segmentInfo.base) {\n    segmentsFn = segmentsFromBase;\n    segmentAttributes = merge(attributes, segmentInfo.base);\n  } else if (segmentInfo.list) {\n    segmentsFn = segmentsFromList;\n    segmentAttributes = merge(attributes, segmentInfo.list);\n  }\n\n  var segmentsInfo = {\n    attributes: attributes\n  };\n\n  if (!segmentsFn) {\n    return segmentsInfo;\n  }\n\n  var segments = segmentsFn(segmentAttributes, segmentInfo.segmentTimeline); // The @duration attribute will be used to determin the playlist's targetDuration which\n  // must be in seconds. Since we've generated the segment list, we no longer need\n  // @duration to be in @timescale units, so we can convert it here.\n\n  if (segmentAttributes.duration) {\n    var _segmentAttributes = segmentAttributes,\n        duration = _segmentAttributes.duration,\n        _segmentAttributes$ti = _segmentAttributes.timescale,\n        timescale = _segmentAttributes$ti === void 0 ? 1 : _segmentAttributes$ti;\n    segmentAttributes.duration = duration / timescale;\n  } else if (segments.length) {\n    // if there is no @duration attribute, use the largest segment duration as\n    // as target duration\n    segmentAttributes.duration = segments.reduce(function (max, segment) {\n      return Math.max(max, Math.ceil(segment.duration));\n    }, 0);\n  } else {\n    segmentAttributes.duration = 0;\n  }\n\n  segmentsInfo.attributes = segmentAttributes;\n  segmentsInfo.segments = segments; // This is a sidx box without actual segment information\n\n  if (segmentInfo.base && segmentAttributes.indexRange) {\n    segmentsInfo.sidx = segments[0];\n    segmentsInfo.segments = [];\n  }\n\n  return segmentsInfo;\n};\nvar toPlaylists = function toPlaylists(representations) {\n  return representations.map(generateSegments);\n};\n\nvar findChildren = function findChildren(element, name) {\n  return from(element.childNodes).filter(function (_ref) {\n    var tagName = _ref.tagName;\n    return tagName === name;\n  });\n};\nvar getContent = function getContent(element) {\n  return element.textContent.trim();\n};\n\nvar parseDuration = function parseDuration(str) {\n  var SECONDS_IN_YEAR = 365 * 24 * 60 * 60;\n  var SECONDS_IN_MONTH = 30 * 24 * 60 * 60;\n  var SECONDS_IN_DAY = 24 * 60 * 60;\n  var SECONDS_IN_HOUR = 60 * 60;\n  var SECONDS_IN_MIN = 60; // P10Y10M10DT10H10M10.1S\n\n  var durationRegex = /P(?:(\\d*)Y)?(?:(\\d*)M)?(?:(\\d*)D)?(?:T(?:(\\d*)H)?(?:(\\d*)M)?(?:([\\d.]*)S)?)?/;\n  var match = durationRegex.exec(str);\n\n  if (!match) {\n    return 0;\n  }\n\n  var _match$slice = match.slice(1),\n      year = _match$slice[0],\n      month = _match$slice[1],\n      day = _match$slice[2],\n      hour = _match$slice[3],\n      minute = _match$slice[4],\n      second = _match$slice[5];\n\n  return parseFloat(year || 0) * SECONDS_IN_YEAR + parseFloat(month || 0) * SECONDS_IN_MONTH + parseFloat(day || 0) * SECONDS_IN_DAY + parseFloat(hour || 0) * SECONDS_IN_HOUR + parseFloat(minute || 0) * SECONDS_IN_MIN + parseFloat(second || 0);\n};\nvar parseDate = function parseDate(str) {\n  // Date format without timezone according to ISO 8601\n  // YYY-MM-DDThh:mm:ss.ssssss\n  var dateRegex = /^\\d+-\\d+-\\d+T\\d+:\\d+:\\d+(\\.\\d+)?$/; // If the date string does not specifiy a timezone, we must specifiy UTC. This is\n  // expressed by ending with 'Z'\n\n  if (dateRegex.test(str)) {\n    str += 'Z';\n  }\n\n  return Date.parse(str);\n};\n\nvar parsers = {\n  /**\n   * Specifies the duration of the entire Media Presentation. Format is a duration string\n   * as specified in ISO 8601\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The duration in seconds\n   */\n  mediaPresentationDuration: function mediaPresentationDuration(value) {\n    return parseDuration(value);\n  },\n\n  /**\n   * Specifies the Segment availability start time for all Segments referred to in this\n   * MPD. For a dynamic manifest, it specifies the anchor for the earliest availability\n   * time. Format is a date string as specified in ISO 8601\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The date as seconds from unix epoch\n   */\n  availabilityStartTime: function availabilityStartTime(value) {\n    return parseDate(value) / 1000;\n  },\n\n  /**\n   * Specifies the smallest period between potential changes to the MPD. Format is a\n   * duration string as specified in ISO 8601\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The duration in seconds\n   */\n  minimumUpdatePeriod: function minimumUpdatePeriod(value) {\n    return parseDuration(value);\n  },\n\n  /**\n   * Specifies the suggested presentation delay. Format is a\n   * duration string as specified in ISO 8601\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The duration in seconds\n   */\n  suggestedPresentationDelay: function suggestedPresentationDelay(value) {\n    return parseDuration(value);\n  },\n\n  /**\n   * specifices the type of mpd. Can be either \"static\" or \"dynamic\"\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   *\n   * @return {string}\n   *         The type as a string\n   */\n  type: function type(value) {\n    return value;\n  },\n\n  /**\n   * Specifies the duration of the smallest time shifting buffer for any Representation\n   * in the MPD. Format is a duration string as specified in ISO 8601\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The duration in seconds\n   */\n  timeShiftBufferDepth: function timeShiftBufferDepth(value) {\n    return parseDuration(value);\n  },\n\n  /**\n   * Specifies the PeriodStart time of the Period relative to the availabilityStarttime.\n   * Format is a duration string as specified in ISO 8601\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The duration in seconds\n   */\n  start: function start(value) {\n    return parseDuration(value);\n  },\n\n  /**\n   * Specifies the width of the visual presentation\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed width\n   */\n  width: function width(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Specifies the height of the visual presentation\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed height\n   */\n  height: function height(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Specifies the bitrate of the representation\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed bandwidth\n   */\n  bandwidth: function bandwidth(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Specifies the number of the first Media Segment in this Representation in the Period\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed number\n   */\n  startNumber: function startNumber(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Specifies the timescale in units per seconds\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed timescale\n   */\n  timescale: function timescale(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Specifies the presentationTimeOffset.\n   *\n   * @param {string} value\n   *        value of the attribute as a string\n   *\n   * @return {number}\n   *         The parsed presentationTimeOffset\n   */\n  presentationTimeOffset: function presentationTimeOffset(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Specifies the constant approximate Segment duration\n   * NOTE: The <Period> element also contains an @duration attribute. This duration\n   *       specifies the duration of the Period. This attribute is currently not\n   *       supported by the rest of the parser, however we still check for it to prevent\n   *       errors.\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed duration\n   */\n  duration: function duration(value) {\n    var parsedValue = parseInt(value, 10);\n\n    if (isNaN(parsedValue)) {\n      return parseDuration(value);\n    }\n\n    return parsedValue;\n  },\n\n  /**\n   * Specifies the Segment duration, in units of the value of the @timescale.\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed duration\n   */\n  d: function d(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Specifies the MPD start time, in @timescale units, the first Segment in the series\n   * starts relative to the beginning of the Period\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed time\n   */\n  t: function t(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Specifies the repeat count of the number of following contiguous Segments with the\n   * same duration expressed by the value of @d\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed number\n   */\n  r: function r(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Default parser for all other attributes. Acts as a no-op and just returns the value\n   * as a string\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {string}\n   *         Unparsed value\n   */\n  DEFAULT: function DEFAULT(value) {\n    return value;\n  }\n};\n/**\n * Gets all the attributes and values of the provided node, parses attributes with known\n * types, and returns an object with attribute names mapped to values.\n *\n * @param {Node} el\n *        The node to parse attributes from\n * @return {Object}\n *         Object with all attributes of el parsed\n */\n\nvar parseAttributes = function parseAttributes(el) {\n  if (!(el && el.attributes)) {\n    return {};\n  }\n\n  return from(el.attributes).reduce(function (a, e) {\n    var parseFn = parsers[e.name] || parsers.DEFAULT;\n    a[e.name] = parseFn(e.value);\n    return a;\n  }, {});\n};\n\nvar keySystemsMap = {\n  'urn:uuid:1077efec-c0b2-4d02-ace3-3c1e52e2fb4b': 'org.w3.clearkey',\n  'urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed': 'com.widevine.alpha',\n  'urn:uuid:9a04f079-9840-4286-ab92-e65be0885f95': 'com.microsoft.playready',\n  'urn:uuid:f239e769-efa3-4850-9c16-a903c6932efb': 'com.adobe.primetime'\n};\n/**\n * Builds a list of urls that is the product of the reference urls and BaseURL values\n *\n * @param {string[]} referenceUrls\n *        List of reference urls to resolve to\n * @param {Node[]} baseUrlElements\n *        List of BaseURL nodes from the mpd\n * @return {string[]}\n *         List of resolved urls\n */\n\nvar buildBaseUrls = function buildBaseUrls(referenceUrls, baseUrlElements) {\n  if (!baseUrlElements.length) {\n    return referenceUrls;\n  }\n\n  return flatten(referenceUrls.map(function (reference) {\n    return baseUrlElements.map(function (baseUrlElement) {\n      return resolveUrl(reference, getContent(baseUrlElement));\n    });\n  }));\n};\n/**\n * Contains all Segment information for its containing AdaptationSet\n *\n * @typedef {Object} SegmentInformation\n * @property {Object|undefined} template\n *           Contains the attributes for the SegmentTemplate node\n * @property {Object[]|undefined} segmentTimeline\n *           Contains a list of atrributes for each S node within the SegmentTimeline node\n * @property {Object|undefined} list\n *           Contains the attributes for the SegmentList node\n * @property {Object|undefined} base\n *           Contains the attributes for the SegmentBase node\n */\n\n/**\n * Returns all available Segment information contained within the AdaptationSet node\n *\n * @param {Node} adaptationSet\n *        The AdaptationSet node to get Segment information from\n * @return {SegmentInformation}\n *         The Segment information contained within the provided AdaptationSet\n */\n\nvar getSegmentInformation = function getSegmentInformation(adaptationSet) {\n  var segmentTemplate = findChildren(adaptationSet, 'SegmentTemplate')[0];\n  var segmentList = findChildren(adaptationSet, 'SegmentList')[0];\n  var segmentUrls = segmentList && findChildren(segmentList, 'SegmentURL').map(function (s) {\n    return merge({\n      tag: 'SegmentURL'\n    }, parseAttributes(s));\n  });\n  var segmentBase = findChildren(adaptationSet, 'SegmentBase')[0];\n  var segmentTimelineParentNode = segmentList || segmentTemplate;\n  var segmentTimeline = segmentTimelineParentNode && findChildren(segmentTimelineParentNode, 'SegmentTimeline')[0];\n  var segmentInitializationParentNode = segmentList || segmentBase || segmentTemplate;\n  var segmentInitialization = segmentInitializationParentNode && findChildren(segmentInitializationParentNode, 'Initialization')[0]; // SegmentTemplate is handled slightly differently, since it can have both\n  // @initialization and an <Initialization> node.  @initialization can be templated,\n  // while the node can have a url and range specified.  If the <SegmentTemplate> has\n  // both @initialization and an <Initialization> subelement we opt to override with\n  // the node, as this interaction is not defined in the spec.\n\n  var template = segmentTemplate && parseAttributes(segmentTemplate);\n\n  if (template && segmentInitialization) {\n    template.initialization = segmentInitialization && parseAttributes(segmentInitialization);\n  } else if (template && template.initialization) {\n    // If it is @initialization we convert it to an object since this is the format that\n    // later functions will rely on for the initialization segment.  This is only valid\n    // for <SegmentTemplate>\n    template.initialization = {\n      sourceURL: template.initialization\n    };\n  }\n\n  var segmentInfo = {\n    template: template,\n    segmentTimeline: segmentTimeline && findChildren(segmentTimeline, 'S').map(function (s) {\n      return parseAttributes(s);\n    }),\n    list: segmentList && merge(parseAttributes(segmentList), {\n      segmentUrls: segmentUrls,\n      initialization: parseAttributes(segmentInitialization)\n    }),\n    base: segmentBase && merge(parseAttributes(segmentBase), {\n      initialization: parseAttributes(segmentInitialization)\n    })\n  };\n  Object.keys(segmentInfo).forEach(function (key) {\n    if (!segmentInfo[key]) {\n      delete segmentInfo[key];\n    }\n  });\n  return segmentInfo;\n};\n/**\n * Contains Segment information and attributes needed to construct a Playlist object\n * from a Representation\n *\n * @typedef {Object} RepresentationInformation\n * @property {SegmentInformation} segmentInfo\n *           Segment information for this Representation\n * @property {Object} attributes\n *           Inherited attributes for this Representation\n */\n\n/**\n * Maps a Representation node to an object containing Segment information and attributes\n *\n * @name inheritBaseUrlsCallback\n * @function\n * @param {Node} representation\n *        Representation node from the mpd\n * @return {RepresentationInformation}\n *         Representation information needed to construct a Playlist object\n */\n\n/**\n * Returns a callback for Array.prototype.map for mapping Representation nodes to\n * Segment information and attributes using inherited BaseURL nodes.\n *\n * @param {Object} adaptationSetAttributes\n *        Contains attributes inherited by the AdaptationSet\n * @param {string[]} adaptationSetBaseUrls\n *        Contains list of resolved base urls inherited by the AdaptationSet\n * @param {SegmentInformation} adaptationSetSegmentInfo\n *        Contains Segment information for the AdaptationSet\n * @return {inheritBaseUrlsCallback}\n *         Callback map function\n */\n\nvar inheritBaseUrls = function inheritBaseUrls(adaptationSetAttributes, adaptationSetBaseUrls, adaptationSetSegmentInfo) {\n  return function (representation) {\n    var repBaseUrlElements = findChildren(representation, 'BaseURL');\n    var repBaseUrls = buildBaseUrls(adaptationSetBaseUrls, repBaseUrlElements);\n    var attributes = merge(adaptationSetAttributes, parseAttributes(representation));\n    var representationSegmentInfo = getSegmentInformation(representation);\n    return repBaseUrls.map(function (baseUrl) {\n      return {\n        segmentInfo: merge(adaptationSetSegmentInfo, representationSegmentInfo),\n        attributes: merge(attributes, {\n          baseUrl: baseUrl\n        })\n      };\n    });\n  };\n};\n/**\n * Tranforms a series of content protection nodes to\n * an object containing pssh data by key system\n *\n * @param {Node[]} contentProtectionNodes\n *        Content protection nodes\n * @return {Object}\n *        Object containing pssh data by key system\n */\n\nvar generateKeySystemInformation = function generateKeySystemInformation(contentProtectionNodes) {\n  return contentProtectionNodes.reduce(function (acc, node) {\n    var attributes = parseAttributes(node);\n    var keySystem = keySystemsMap[attributes.schemeIdUri];\n\n    if (keySystem) {\n      acc[keySystem] = {\n        attributes: attributes\n      };\n      var psshNode = findChildren(node, 'cenc:pssh')[0];\n\n      if (psshNode) {\n        var pssh = getContent(psshNode);\n        var psshBuffer = pssh && decodeB64ToUint8Array(pssh);\n        acc[keySystem].pssh = psshBuffer;\n      }\n    }\n\n    return acc;\n  }, {});\n}; // defined in ANSI_SCTE 214-1 2016\n\n\nvar parseCaptionServiceMetadata = function parseCaptionServiceMetadata(service) {\n  // 608 captions\n  if (service.schemeIdUri === 'urn:scte:dash:cc:cea-608:2015') {\n    var values = typeof service.value !== 'string' ? [] : service.value.split(';');\n    return values.map(function (value) {\n      var channel;\n      var language; // default language to value\n\n      language = value;\n\n      if (/^CC\\d=/.test(value)) {\n        var _value$split = value.split('=');\n\n        channel = _value$split[0];\n        language = _value$split[1];\n      } else if (/^CC\\d$/.test(value)) {\n        channel = value;\n      }\n\n      return {\n        channel: channel,\n        language: language\n      };\n    });\n  } else if (service.schemeIdUri === 'urn:scte:dash:cc:cea-708:2015') {\n    var _values = typeof service.value !== 'string' ? [] : service.value.split(';');\n\n    return _values.map(function (value) {\n      var flags = {\n        // service or channel number 1-63\n        'channel': undefined,\n        // language is a 3ALPHA per ISO 639.2/B\n        // field is required\n        'language': undefined,\n        // BIT 1/0 or ?\n        // default value is 1, meaning 16:9 aspect ratio, 0 is 4:3, ? is unknown\n        'aspectRatio': 1,\n        // BIT 1/0\n        // easy reader flag indicated the text is tailed to the needs of beginning readers\n        // default 0, or off\n        'easyReader': 0,\n        // BIT 1/0\n        // If 3d metadata is present (CEA-708.1) then 1\n        // default 0\n        '3D': 0\n      };\n\n      if (/=/.test(value)) {\n        var _value$split2 = value.split('='),\n            channel = _value$split2[0],\n            _value$split2$ = _value$split2[1],\n            opts = _value$split2$ === void 0 ? '' : _value$split2$;\n\n        flags.channel = channel;\n        flags.language = value;\n        opts.split(',').forEach(function (opt) {\n          var _opt$split = opt.split(':'),\n              name = _opt$split[0],\n              val = _opt$split[1];\n\n          if (name === 'lang') {\n            flags.language = val; // er for easyReadery\n          } else if (name === 'er') {\n            flags.easyReader = Number(val); // war for wide aspect ratio\n          } else if (name === 'war') {\n            flags.aspectRatio = Number(val);\n          } else if (name === '3D') {\n            flags['3D'] = Number(val);\n          }\n        });\n      } else {\n        flags.language = value;\n      }\n\n      if (flags.channel) {\n        flags.channel = 'SERVICE' + flags.channel;\n      }\n\n      return flags;\n    });\n  }\n};\n/**\n * Maps an AdaptationSet node to a list of Representation information objects\n *\n * @name toRepresentationsCallback\n * @function\n * @param {Node} adaptationSet\n *        AdaptationSet node from the mpd\n * @return {RepresentationInformation[]}\n *         List of objects containing Representaion information\n */\n\n/**\n * Returns a callback for Array.prototype.map for mapping AdaptationSet nodes to a list of\n * Representation information objects\n *\n * @param {Object} periodAttributes\n *        Contains attributes inherited by the Period\n * @param {string[]} periodBaseUrls\n *        Contains list of resolved base urls inherited by the Period\n * @param {string[]} periodSegmentInfo\n *        Contains Segment Information at the period level\n * @return {toRepresentationsCallback}\n *         Callback map function\n */\n\nvar toRepresentations = function toRepresentations(periodAttributes, periodBaseUrls, periodSegmentInfo) {\n  return function (adaptationSet) {\n    var adaptationSetAttributes = parseAttributes(adaptationSet);\n    var adaptationSetBaseUrls = buildBaseUrls(periodBaseUrls, findChildren(adaptationSet, 'BaseURL'));\n    var role = findChildren(adaptationSet, 'Role')[0];\n    var roleAttributes = {\n      role: parseAttributes(role)\n    };\n    var attrs = merge(periodAttributes, adaptationSetAttributes, roleAttributes);\n    var accessibility = findChildren(adaptationSet, 'Accessibility')[0];\n    var captionServices = parseCaptionServiceMetadata(parseAttributes(accessibility));\n\n    if (captionServices) {\n      attrs = merge(attrs, {\n        captionServices: captionServices\n      });\n    }\n\n    var label = findChildren(adaptationSet, 'Label')[0];\n\n    if (label && label.childNodes.length) {\n      var labelVal = label.childNodes[0].nodeValue.trim();\n      attrs = merge(attrs, {\n        label: labelVal\n      });\n    }\n\n    var contentProtection = generateKeySystemInformation(findChildren(adaptationSet, 'ContentProtection'));\n\n    if (Object.keys(contentProtection).length) {\n      attrs = merge(attrs, {\n        contentProtection: contentProtection\n      });\n    }\n\n    var segmentInfo = getSegmentInformation(adaptationSet);\n    var representations = findChildren(adaptationSet, 'Representation');\n    var adaptationSetSegmentInfo = merge(periodSegmentInfo, segmentInfo);\n    return flatten(representations.map(inheritBaseUrls(attrs, adaptationSetBaseUrls, adaptationSetSegmentInfo)));\n  };\n};\n/**\n * Contains all period information for mapping nodes onto adaptation sets.\n *\n * @typedef {Object} PeriodInformation\n * @property {Node} period.node\n *           Period node from the mpd\n * @property {Object} period.attributes\n *           Parsed period attributes from node plus any added\n */\n\n/**\n * Maps a PeriodInformation object to a list of Representation information objects for all\n * AdaptationSet nodes contained within the Period.\n *\n * @name toAdaptationSetsCallback\n * @function\n * @param {PeriodInformation} period\n *        Period object containing necessary period information\n * @param {number} periodStart\n *        Start time of the Period within the mpd\n * @return {RepresentationInformation[]}\n *         List of objects containing Representaion information\n */\n\n/**\n * Returns a callback for Array.prototype.map for mapping Period nodes to a list of\n * Representation information objects\n *\n * @param {Object} mpdAttributes\n *        Contains attributes inherited by the mpd\n * @param {string[]} mpdBaseUrls\n *        Contains list of resolved base urls inherited by the mpd\n * @return {toAdaptationSetsCallback}\n *         Callback map function\n */\n\nvar toAdaptationSets = function toAdaptationSets(mpdAttributes, mpdBaseUrls) {\n  return function (period, index) {\n    var periodBaseUrls = buildBaseUrls(mpdBaseUrls, findChildren(period.node, 'BaseURL'));\n    var periodAttributes = merge(mpdAttributes, {\n      periodStart: period.attributes.start\n    });\n\n    if (typeof period.attributes.duration === 'number') {\n      periodAttributes.periodDuration = period.attributes.duration;\n    }\n\n    var adaptationSets = findChildren(period.node, 'AdaptationSet');\n    var periodSegmentInfo = getSegmentInformation(period.node);\n    return flatten(adaptationSets.map(toRepresentations(periodAttributes, periodBaseUrls, periodSegmentInfo)));\n  };\n};\n/**\n * Gets Period@start property for a given period.\n *\n * @param {Object} options\n *        Options object\n * @param {Object} options.attributes\n *        Period attributes\n * @param {Object} [options.priorPeriodAttributes]\n *        Prior period attributes (if prior period is available)\n * @param {string} options.mpdType\n *        The MPD@type these periods came from\n * @return {number|null}\n *         The period start, or null if it's an early available period or error\n */\n\nvar getPeriodStart = function getPeriodStart(_ref) {\n  var attributes = _ref.attributes,\n      priorPeriodAttributes = _ref.priorPeriodAttributes,\n      mpdType = _ref.mpdType;\n\n  // Summary of period start time calculation from DASH spec section 5.3.2.1\n  //\n  // A period's start is the first period's start + time elapsed after playing all\n  // prior periods to this one. Periods continue one after the other in time (without\n  // gaps) until the end of the presentation.\n  //\n  // The value of Period@start should be:\n  // 1. if Period@start is present: value of Period@start\n  // 2. if previous period exists and it has @duration: previous Period@start +\n  //    previous Period@duration\n  // 3. if this is first period and MPD@type is 'static': 0\n  // 4. in all other cases, consider the period an \"early available period\" (note: not\n  //    currently supported)\n  // (1)\n  if (typeof attributes.start === 'number') {\n    return attributes.start;\n  } // (2)\n\n\n  if (priorPeriodAttributes && typeof priorPeriodAttributes.start === 'number' && typeof priorPeriodAttributes.duration === 'number') {\n    return priorPeriodAttributes.start + priorPeriodAttributes.duration;\n  } // (3)\n\n\n  if (!priorPeriodAttributes && mpdType === 'static') {\n    return 0;\n  } // (4)\n  // There is currently no logic for calculating the Period@start value if there is\n  // no Period@start or prior Period@start and Period@duration available. This is not made\n  // explicit by the DASH interop guidelines or the DASH spec, however, since there's\n  // nothing about any other resolution strategies, it's implied. Thus, this case should\n  // be considered an early available period, or error, and null should suffice for both\n  // of those cases.\n\n\n  return null;\n};\n/**\n * Traverses the mpd xml tree to generate a list of Representation information objects\n * that have inherited attributes from parent nodes\n *\n * @param {Node} mpd\n *        The root node of the mpd\n * @param {Object} options\n *        Available options for inheritAttributes\n * @param {string} options.manifestUri\n *        The uri source of the mpd\n * @param {number} options.NOW\n *        Current time per DASH IOP.  Default is current time in ms since epoch\n * @param {number} options.clientOffset\n *        Client time difference from NOW (in milliseconds)\n * @return {RepresentationInformation[]}\n *         List of objects containing Representation information\n */\n\nvar inheritAttributes = function inheritAttributes(mpd, options) {\n  if (options === void 0) {\n    options = {};\n  }\n\n  var _options = options,\n      _options$manifestUri = _options.manifestUri,\n      manifestUri = _options$manifestUri === void 0 ? '' : _options$manifestUri,\n      _options$NOW = _options.NOW,\n      NOW = _options$NOW === void 0 ? Date.now() : _options$NOW,\n      _options$clientOffset = _options.clientOffset,\n      clientOffset = _options$clientOffset === void 0 ? 0 : _options$clientOffset;\n  var periodNodes = findChildren(mpd, 'Period');\n\n  if (!periodNodes.length) {\n    throw new Error(errors.INVALID_NUMBER_OF_PERIOD);\n  }\n\n  var locations = findChildren(mpd, 'Location');\n  var mpdAttributes = parseAttributes(mpd);\n  var mpdBaseUrls = buildBaseUrls([manifestUri], findChildren(mpd, 'BaseURL')); // See DASH spec section 5.3.1.2, Semantics of MPD element. Default type to 'static'.\n\n  mpdAttributes.type = mpdAttributes.type || 'static';\n  mpdAttributes.sourceDuration = mpdAttributes.mediaPresentationDuration || 0;\n  mpdAttributes.NOW = NOW;\n  mpdAttributes.clientOffset = clientOffset;\n\n  if (locations.length) {\n    mpdAttributes.locations = locations.map(getContent);\n  }\n\n  var periods = []; // Since toAdaptationSets acts on individual periods right now, the simplest approach to\n  // adding properties that require looking at prior periods is to parse attributes and add\n  // missing ones before toAdaptationSets is called. If more such properties are added, it\n  // may be better to refactor toAdaptationSets.\n\n  periodNodes.forEach(function (node, index) {\n    var attributes = parseAttributes(node); // Use the last modified prior period, as it may contain added information necessary\n    // for this period.\n\n    var priorPeriod = periods[index - 1];\n    attributes.start = getPeriodStart({\n      attributes: attributes,\n      priorPeriodAttributes: priorPeriod ? priorPeriod.attributes : null,\n      mpdType: mpdAttributes.type\n    });\n    periods.push({\n      node: node,\n      attributes: attributes\n    });\n  });\n  return {\n    locations: mpdAttributes.locations,\n    representationInfo: flatten(periods.map(toAdaptationSets(mpdAttributes, mpdBaseUrls)))\n  };\n};\n\nvar stringToMpdXml = function stringToMpdXml(manifestString) {\n  if (manifestString === '') {\n    throw new Error(errors.DASH_EMPTY_MANIFEST);\n  }\n\n  var parser = new DOMParser();\n  var xml;\n  var mpd;\n\n  try {\n    xml = parser.parseFromString(manifestString, 'application/xml');\n    mpd = xml && xml.documentElement.tagName === 'MPD' ? xml.documentElement : null;\n  } catch (e) {// ie 11 throwsw on invalid xml\n  }\n\n  if (!mpd || mpd && mpd.getElementsByTagName('parsererror').length > 0) {\n    throw new Error(errors.DASH_INVALID_XML);\n  }\n\n  return mpd;\n};\n\n/**\n * Parses the manifest for a UTCTiming node, returning the nodes attributes if found\n *\n * @param {string} mpd\n *        XML string of the MPD manifest\n * @return {Object|null}\n *         Attributes of UTCTiming node specified in the manifest. Null if none found\n */\n\nvar parseUTCTimingScheme = function parseUTCTimingScheme(mpd) {\n  var UTCTimingNode = findChildren(mpd, 'UTCTiming')[0];\n\n  if (!UTCTimingNode) {\n    return null;\n  }\n\n  var attributes = parseAttributes(UTCTimingNode);\n\n  switch (attributes.schemeIdUri) {\n    case 'urn:mpeg:dash:utc:http-head:2014':\n    case 'urn:mpeg:dash:utc:http-head:2012':\n      attributes.method = 'HEAD';\n      break;\n\n    case 'urn:mpeg:dash:utc:http-xsdate:2014':\n    case 'urn:mpeg:dash:utc:http-iso:2014':\n    case 'urn:mpeg:dash:utc:http-xsdate:2012':\n    case 'urn:mpeg:dash:utc:http-iso:2012':\n      attributes.method = 'GET';\n      break;\n\n    case 'urn:mpeg:dash:utc:direct:2014':\n    case 'urn:mpeg:dash:utc:direct:2012':\n      attributes.method = 'DIRECT';\n      attributes.value = Date.parse(attributes.value);\n      break;\n\n    case 'urn:mpeg:dash:utc:http-ntp:2014':\n    case 'urn:mpeg:dash:utc:ntp:2014':\n    case 'urn:mpeg:dash:utc:sntp:2014':\n    default:\n      throw new Error(errors.UNSUPPORTED_UTC_TIMING_SCHEME);\n  }\n\n  return attributes;\n};\n\nvar VERSION = version;\n/*\n * Given a DASH manifest string and options, parses the DASH manifest into an object in the\n * form outputed by m3u8-parser and accepted by videojs/http-streaming.\n *\n * For live DASH manifests, if `previousManifest` is provided in options, then the newly\n * parsed DASH manifest will have its media sequence and discontinuity sequence values\n * updated to reflect its position relative to the prior manifest.\n *\n * @param {string} manifestString - the DASH manifest as a string\n * @param {options} [options] - any options\n *\n * @return {Object} the manifest object\n */\n\nvar parse = function parse(manifestString, options) {\n  if (options === void 0) {\n    options = {};\n  }\n\n  var parsedManifestInfo = inheritAttributes(stringToMpdXml(manifestString), options);\n  var playlists = toPlaylists(parsedManifestInfo.representationInfo);\n  return toM3u8({\n    dashPlaylists: playlists,\n    locations: parsedManifestInfo.locations,\n    sidxMapping: options.sidxMapping,\n    previousManifest: options.previousManifest\n  });\n};\n/**\n * Parses the manifest for a UTCTiming node, returning the nodes attributes if found\n *\n * @param {string} manifestString\n *        XML string of the MPD manifest\n * @return {Object|null}\n *         Attributes of UTCTiming node specified in the manifest. Null if none found\n */\n\n\nvar parseUTCTiming = function parseUTCTiming(manifestString) {\n  return parseUTCTimingScheme(stringToMpdXml(manifestString));\n};\n\nexport { VERSION, addSidxSegmentsToPlaylist$1 as addSidxSegmentsToPlaylist, generateSidxKey, inheritAttributes, parse, parseUTCTiming, stringToMpdXml, toM3u8, toPlaylists };\n","/**\n * Loops through all supported media groups in master and calls the provided\n * callback for each group\n *\n * @param {Object} master\n *        The parsed master manifest object\n * @param {string[]} groups\n *        The media groups to call the callback for\n * @param {Function} callback\n *        Callback to call for each media group\n */\nexport var forEachMediaGroup = function forEachMediaGroup(master, groups, callback) {\n  groups.forEach(function (mediaType) {\n    for (var groupKey in master.mediaGroups[mediaType]) {\n      for (var labelKey in master.mediaGroups[mediaType][groupKey]) {\n        var mediaProperties = master.mediaGroups[mediaType][groupKey][labelKey];\n        callback(mediaProperties, mediaType, groupKey, labelKey);\n      }\n    }\n  });\n};","import { toUint8, bytesMatch } from './byte-helpers.js';\nvar ID3 = toUint8([0x49, 0x44, 0x33]);\nexport var getId3Size = function getId3Size(bytes, offset) {\n  if (offset === void 0) {\n    offset = 0;\n  }\n\n  bytes = toUint8(bytes);\n  var flags = bytes[offset + 5];\n  var returnSize = bytes[offset + 6] << 21 | bytes[offset + 7] << 14 | bytes[offset + 8] << 7 | bytes[offset + 9];\n  var footerPresent = (flags & 16) >> 4;\n\n  if (footerPresent) {\n    return returnSize + 20;\n  }\n\n  return returnSize + 10;\n};\nexport var getId3Offset = function getId3Offset(bytes, offset) {\n  if (offset === void 0) {\n    offset = 0;\n  }\n\n  bytes = toUint8(bytes);\n\n  if (bytes.length - offset < 10 || !bytesMatch(bytes, ID3, {\n    offset: offset\n  })) {\n    return offset;\n  }\n\n  offset += getId3Size(bytes, offset); // recursive check for id3 tags as some files\n  // have multiple ID3 tag sections even though\n  // they should not.\n\n  return getId3Offset(bytes, offset);\n};","export var OPUS_HEAD = new Uint8Array([// O, p, u, s\n0x4f, 0x70, 0x75, 0x73, // H, e, a, d\n0x48, 0x65, 0x61, 0x64]); // https://wiki.xiph.org/OggOpus\n// https://vfrmaniac.fushizen.eu/contents/opus_in_isobmff.html\n// https://opus-codec.org/docs/opusfile_api-0.7/structOpusHead.html\n\nexport var parseOpusHead = function parseOpusHead(bytes) {\n  var view = new DataView(bytes.buffer, bytes.byteOffset, bytes.byteLength);\n  var version = view.getUint8(0); // version 0, from mp4, does not use littleEndian.\n\n  var littleEndian = version !== 0;\n  var config = {\n    version: version,\n    channels: view.getUint8(1),\n    preSkip: view.getUint16(2, littleEndian),\n    sampleRate: view.getUint32(4, littleEndian),\n    outputGain: view.getUint16(8, littleEndian),\n    channelMappingFamily: view.getUint8(10)\n  };\n\n  if (config.channelMappingFamily > 0 && bytes.length > 10) {\n    config.streamCount = view.getUint8(11);\n    config.twoChannelStreamCount = view.getUint8(12);\n    config.channelMapping = [];\n\n    for (var c = 0; c < config.channels; c++) {\n      config.channelMapping.push(view.getUint8(13 + c));\n    }\n  }\n\n  return config;\n};\nexport var setOpusHead = function setOpusHead(config) {\n  var size = config.channelMappingFamily <= 0 ? 11 : 12 + config.channels;\n  var view = new DataView(new ArrayBuffer(size));\n  var littleEndian = config.version !== 0;\n  view.setUint8(0, config.version);\n  view.setUint8(1, config.channels);\n  view.setUint16(2, config.preSkip, littleEndian);\n  view.setUint32(4, config.sampleRate, littleEndian);\n  view.setUint16(8, config.outputGain, littleEndian);\n  view.setUint8(10, config.channelMappingFamily);\n\n  if (config.channelMappingFamily > 0) {\n    view.setUint8(11, config.streamCount);\n    config.channelMapping.foreach(function (cm, i) {\n      view.setUint8(12 + i, cm);\n    });\n  }\n\n  return new Uint8Array(view.buffer);\n};","import { toUint8, bytesToNumber, bytesMatch, bytesToString, numberToBytes, padStart } from './byte-helpers';\nimport { getAvcCodec, getHvcCodec, getAv1Codec } from './codec-helpers.js'; // relevant specs for this parser:\n// https://matroska-org.github.io/libebml/specs.html\n// https://www.matroska.org/technical/elements.html\n// https://www.webmproject.org/docs/container/\n\nexport var EBML_TAGS = {\n  EBML: toUint8([0x1A, 0x45, 0xDF, 0xA3]),\n  DocType: toUint8([0x42, 0x82]),\n  Segment: toUint8([0x18, 0x53, 0x80, 0x67]),\n  SegmentInfo: toUint8([0x15, 0x49, 0xA9, 0x66]),\n  Tracks: toUint8([0x16, 0x54, 0xAE, 0x6B]),\n  Track: toUint8([0xAE]),\n  TrackNumber: toUint8([0xd7]),\n  DefaultDuration: toUint8([0x23, 0xe3, 0x83]),\n  TrackEntry: toUint8([0xAE]),\n  TrackType: toUint8([0x83]),\n  FlagDefault: toUint8([0x88]),\n  CodecID: toUint8([0x86]),\n  CodecPrivate: toUint8([0x63, 0xA2]),\n  VideoTrack: toUint8([0xe0]),\n  AudioTrack: toUint8([0xe1]),\n  // Not used yet, but will be used for live webm/mkv\n  // see https://www.matroska.org/technical/basics.html#block-structure\n  // see https://www.matroska.org/technical/basics.html#simpleblock-structure\n  Cluster: toUint8([0x1F, 0x43, 0xB6, 0x75]),\n  Timestamp: toUint8([0xE7]),\n  TimestampScale: toUint8([0x2A, 0xD7, 0xB1]),\n  BlockGroup: toUint8([0xA0]),\n  BlockDuration: toUint8([0x9B]),\n  Block: toUint8([0xA1]),\n  SimpleBlock: toUint8([0xA3])\n};\n/**\n * This is a simple table to determine the length\n * of things in ebml. The length is one based (starts at 1,\n * rather than zero) and for every zero bit before a one bit\n * we add one to length. We also need this table because in some\n * case we have to xor all the length bits from another value.\n */\n\nvar LENGTH_TABLE = [128, 64, 32, 16, 8, 4, 2, 1];\n\nvar getLength = function getLength(byte) {\n  var len = 1;\n\n  for (var i = 0; i < LENGTH_TABLE.length; i++) {\n    if (byte & LENGTH_TABLE[i]) {\n      break;\n    }\n\n    len++;\n  }\n\n  return len;\n}; // length in ebml is stored in the first 4 to 8 bits\n// of the first byte. 4 for the id length and 8 for the\n// data size length. Length is measured by converting the number to binary\n// then 1 + the number of zeros before a 1 is encountered starting\n// from the left.\n\n\nvar getvint = function getvint(bytes, offset, removeLength, signed) {\n  if (removeLength === void 0) {\n    removeLength = true;\n  }\n\n  if (signed === void 0) {\n    signed = false;\n  }\n\n  var length = getLength(bytes[offset]);\n  var valueBytes = bytes.subarray(offset, offset + length); // NOTE that we do **not** subarray here because we need to copy these bytes\n  // as they will be modified below to remove the dataSizeLen bits and we do not\n  // want to modify the original data. normally we could just call slice on\n  // uint8array but ie 11 does not support that...\n\n  if (removeLength) {\n    valueBytes = Array.prototype.slice.call(bytes, offset, offset + length);\n    valueBytes[0] ^= LENGTH_TABLE[length - 1];\n  }\n\n  return {\n    length: length,\n    value: bytesToNumber(valueBytes, {\n      signed: signed\n    }),\n    bytes: valueBytes\n  };\n};\n\nvar normalizePath = function normalizePath(path) {\n  if (typeof path === 'string') {\n    return path.match(/.{1,2}/g).map(function (p) {\n      return normalizePath(p);\n    });\n  }\n\n  if (typeof path === 'number') {\n    return numberToBytes(path);\n  }\n\n  return path;\n};\n\nvar normalizePaths = function normalizePaths(paths) {\n  if (!Array.isArray(paths)) {\n    return [normalizePath(paths)];\n  }\n\n  return paths.map(function (p) {\n    return normalizePath(p);\n  });\n};\n\nvar getInfinityDataSize = function getInfinityDataSize(id, bytes, offset) {\n  if (offset >= bytes.length) {\n    return bytes.length;\n  }\n\n  var innerid = getvint(bytes, offset, false);\n\n  if (bytesMatch(id.bytes, innerid.bytes)) {\n    return offset;\n  }\n\n  var dataHeader = getvint(bytes, offset + innerid.length);\n  return getInfinityDataSize(id, bytes, offset + dataHeader.length + dataHeader.value + innerid.length);\n};\n/**\n * Notes on the EBLM format.\n *\n * EBLM uses \"vints\" tags. Every vint tag contains\n * two parts\n *\n * 1. The length from the first byte. You get this by\n *    converting the byte to binary and counting the zeros\n *    before a 1. Then you add 1 to that. Examples\n *    00011111 = length 4 because there are 3 zeros before a 1.\n *    00100000 = length 3 because there are 2 zeros before a 1.\n *    00000011 = length 7 because there are 6 zeros before a 1.\n *\n * 2. The bits used for length are removed from the first byte\n *    Then all the bytes are merged into a value. NOTE: this\n *    is not the case for id ebml tags as there id includes\n *    length bits.\n *\n */\n\n\nexport var findEbml = function findEbml(bytes, paths) {\n  paths = normalizePaths(paths);\n  bytes = toUint8(bytes);\n  var results = [];\n\n  if (!paths.length) {\n    return results;\n  }\n\n  var i = 0;\n\n  while (i < bytes.length) {\n    var id = getvint(bytes, i, false);\n    var dataHeader = getvint(bytes, i + id.length);\n    var dataStart = i + id.length + dataHeader.length; // dataSize is unknown or this is a live stream\n\n    if (dataHeader.value === 0x7f) {\n      dataHeader.value = getInfinityDataSize(id, bytes, dataStart);\n\n      if (dataHeader.value !== bytes.length) {\n        dataHeader.value -= dataStart;\n      }\n    }\n\n    var dataEnd = dataStart + dataHeader.value > bytes.length ? bytes.length : dataStart + dataHeader.value;\n    var data = bytes.subarray(dataStart, dataEnd);\n\n    if (bytesMatch(paths[0], id.bytes)) {\n      if (paths.length === 1) {\n        // this is the end of the paths and we've found the tag we were\n        // looking for\n        results.push(data);\n      } else {\n        // recursively search for the next tag inside of the data\n        // of this one\n        results = results.concat(findEbml(data, paths.slice(1)));\n      }\n    }\n\n    var totalLength = id.length + dataHeader.length + data.length; // move past this tag entirely, we are not looking for it\n\n    i += totalLength;\n  }\n\n  return results;\n}; // see https://www.matroska.org/technical/basics.html#block-structure\n\nexport var decodeBlock = function decodeBlock(block, type, timestampScale, clusterTimestamp) {\n  var duration;\n\n  if (type === 'group') {\n    duration = findEbml(block, [EBML_TAGS.BlockDuration])[0];\n\n    if (duration) {\n      duration = bytesToNumber(duration);\n      duration = 1 / timestampScale * duration * timestampScale / 1000;\n    }\n\n    block = findEbml(block, [EBML_TAGS.Block])[0];\n    type = 'block'; // treat data as a block after this point\n  }\n\n  var dv = new DataView(block.buffer, block.byteOffset, block.byteLength);\n  var trackNumber = getvint(block, 0);\n  var timestamp = dv.getInt16(trackNumber.length, false);\n  var flags = block[trackNumber.length + 2];\n  var data = block.subarray(trackNumber.length + 3); // pts/dts in seconds\n\n  var ptsdts = 1 / timestampScale * (clusterTimestamp + timestamp) * timestampScale / 1000; // return the frame\n\n  var parsed = {\n    duration: duration,\n    trackNumber: trackNumber.value,\n    keyframe: type === 'simple' && flags >> 7 === 1,\n    invisible: (flags & 0x08) >> 3 === 1,\n    lacing: (flags & 0x06) >> 1,\n    discardable: type === 'simple' && (flags & 0x01) === 1,\n    frames: [],\n    pts: ptsdts,\n    dts: ptsdts,\n    timestamp: timestamp\n  };\n\n  if (!parsed.lacing) {\n    parsed.frames.push(data);\n    return parsed;\n  }\n\n  var numberOfFrames = data[0] + 1;\n  var frameSizes = [];\n  var offset = 1; // Fixed\n\n  if (parsed.lacing === 2) {\n    var sizeOfFrame = (data.length - offset) / numberOfFrames;\n\n    for (var i = 0; i < numberOfFrames; i++) {\n      frameSizes.push(sizeOfFrame);\n    }\n  } // xiph\n\n\n  if (parsed.lacing === 1) {\n    for (var _i = 0; _i < numberOfFrames - 1; _i++) {\n      var size = 0;\n\n      do {\n        size += data[offset];\n        offset++;\n      } while (data[offset - 1] === 0xFF);\n\n      frameSizes.push(size);\n    }\n  } // ebml\n\n\n  if (parsed.lacing === 3) {\n    // first vint is unsinged\n    // after that vints are singed and\n    // based on a compounding size\n    var _size = 0;\n\n    for (var _i2 = 0; _i2 < numberOfFrames - 1; _i2++) {\n      var vint = _i2 === 0 ? getvint(data, offset) : getvint(data, offset, true, true);\n      _size += vint.value;\n      frameSizes.push(_size);\n      offset += vint.length;\n    }\n  }\n\n  frameSizes.forEach(function (size) {\n    parsed.frames.push(data.subarray(offset, offset + size));\n    offset += size;\n  });\n  return parsed;\n}; // VP9 Codec Feature Metadata (CodecPrivate)\n// https://www.webmproject.org/docs/container/\n\nvar parseVp9Private = function parseVp9Private(bytes) {\n  var i = 0;\n  var params = {};\n\n  while (i < bytes.length) {\n    var id = bytes[i] & 0x7f;\n    var len = bytes[i + 1];\n    var val = void 0;\n\n    if (len === 1) {\n      val = bytes[i + 2];\n    } else {\n      val = bytes.subarray(i + 2, i + 2 + len);\n    }\n\n    if (id === 1) {\n      params.profile = val;\n    } else if (id === 2) {\n      params.level = val;\n    } else if (id === 3) {\n      params.bitDepth = val;\n    } else if (id === 4) {\n      params.chromaSubsampling = val;\n    } else {\n      params[id] = val;\n    }\n\n    i += 2 + len;\n  }\n\n  return params;\n};\n\nexport var parseTracks = function parseTracks(bytes) {\n  bytes = toUint8(bytes);\n  var decodedTracks = [];\n  var tracks = findEbml(bytes, [EBML_TAGS.Segment, EBML_TAGS.Tracks, EBML_TAGS.Track]);\n\n  if (!tracks.length) {\n    tracks = findEbml(bytes, [EBML_TAGS.Tracks, EBML_TAGS.Track]);\n  }\n\n  if (!tracks.length) {\n    tracks = findEbml(bytes, [EBML_TAGS.Track]);\n  }\n\n  if (!tracks.length) {\n    return decodedTracks;\n  }\n\n  tracks.forEach(function (track) {\n    var trackType = findEbml(track, EBML_TAGS.TrackType)[0];\n\n    if (!trackType || !trackType.length) {\n      return;\n    } // 1 is video, 2 is audio, 17 is subtitle\n    // other values are unimportant in this context\n\n\n    if (trackType[0] === 1) {\n      trackType = 'video';\n    } else if (trackType[0] === 2) {\n      trackType = 'audio';\n    } else if (trackType[0] === 17) {\n      trackType = 'subtitle';\n    } else {\n      return;\n    } // todo parse language\n\n\n    var decodedTrack = {\n      rawCodec: bytesToString(findEbml(track, [EBML_TAGS.CodecID])[0]),\n      type: trackType,\n      codecPrivate: findEbml(track, [EBML_TAGS.CodecPrivate])[0],\n      number: bytesToNumber(findEbml(track, [EBML_TAGS.TrackNumber])[0]),\n      defaultDuration: bytesToNumber(findEbml(track, [EBML_TAGS.DefaultDuration])[0]),\n      default: findEbml(track, [EBML_TAGS.FlagDefault])[0],\n      rawData: track\n    };\n    var codec = '';\n\n    if (/V_MPEG4\\/ISO\\/AVC/.test(decodedTrack.rawCodec)) {\n      codec = \"avc1.\" + getAvcCodec(decodedTrack.codecPrivate);\n    } else if (/V_MPEGH\\/ISO\\/HEVC/.test(decodedTrack.rawCodec)) {\n      codec = \"hev1.\" + getHvcCodec(decodedTrack.codecPrivate);\n    } else if (/V_MPEG4\\/ISO\\/ASP/.test(decodedTrack.rawCodec)) {\n      if (decodedTrack.codecPrivate) {\n        codec = 'mp4v.20.' + decodedTrack.codecPrivate[4].toString();\n      } else {\n        codec = 'mp4v.20.9';\n      }\n    } else if (/^V_THEORA/.test(decodedTrack.rawCodec)) {\n      codec = 'theora';\n    } else if (/^V_VP8/.test(decodedTrack.rawCodec)) {\n      codec = 'vp8';\n    } else if (/^V_VP9/.test(decodedTrack.rawCodec)) {\n      if (decodedTrack.codecPrivate) {\n        var _parseVp9Private = parseVp9Private(decodedTrack.codecPrivate),\n            profile = _parseVp9Private.profile,\n            level = _parseVp9Private.level,\n            bitDepth = _parseVp9Private.bitDepth,\n            chromaSubsampling = _parseVp9Private.chromaSubsampling;\n\n        codec = 'vp09.';\n        codec += padStart(profile, 2, '0') + \".\";\n        codec += padStart(level, 2, '0') + \".\";\n        codec += padStart(bitDepth, 2, '0') + \".\";\n        codec += \"\" + padStart(chromaSubsampling, 2, '0'); // Video -> Colour -> Ebml name\n\n        var matrixCoefficients = findEbml(track, [0xE0, [0x55, 0xB0], [0x55, 0xB1]])[0] || [];\n        var videoFullRangeFlag = findEbml(track, [0xE0, [0x55, 0xB0], [0x55, 0xB9]])[0] || [];\n        var transferCharacteristics = findEbml(track, [0xE0, [0x55, 0xB0], [0x55, 0xBA]])[0] || [];\n        var colourPrimaries = findEbml(track, [0xE0, [0x55, 0xB0], [0x55, 0xBB]])[0] || []; // if we find any optional codec parameter specify them all.\n\n        if (matrixCoefficients.length || videoFullRangeFlag.length || transferCharacteristics.length || colourPrimaries.length) {\n          codec += \".\" + padStart(colourPrimaries[0], 2, '0');\n          codec += \".\" + padStart(transferCharacteristics[0], 2, '0');\n          codec += \".\" + padStart(matrixCoefficients[0], 2, '0');\n          codec += \".\" + padStart(videoFullRangeFlag[0], 2, '0');\n        }\n      } else {\n        codec = 'vp9';\n      }\n    } else if (/^V_AV1/.test(decodedTrack.rawCodec)) {\n      codec = \"av01.\" + getAv1Codec(decodedTrack.codecPrivate);\n    } else if (/A_ALAC/.test(decodedTrack.rawCodec)) {\n      codec = 'alac';\n    } else if (/A_MPEG\\/L2/.test(decodedTrack.rawCodec)) {\n      codec = 'mp2';\n    } else if (/A_MPEG\\/L3/.test(decodedTrack.rawCodec)) {\n      codec = 'mp3';\n    } else if (/^A_AAC/.test(decodedTrack.rawCodec)) {\n      if (decodedTrack.codecPrivate) {\n        codec = 'mp4a.40.' + (decodedTrack.codecPrivate[0] >>> 3).toString();\n      } else {\n        codec = 'mp4a.40.2';\n      }\n    } else if (/^A_AC3/.test(decodedTrack.rawCodec)) {\n      codec = 'ac-3';\n    } else if (/^A_PCM/.test(decodedTrack.rawCodec)) {\n      codec = 'pcm';\n    } else if (/^A_MS\\/ACM/.test(decodedTrack.rawCodec)) {\n      codec = 'speex';\n    } else if (/^A_EAC3/.test(decodedTrack.rawCodec)) {\n      codec = 'ec-3';\n    } else if (/^A_VORBIS/.test(decodedTrack.rawCodec)) {\n      codec = 'vorbis';\n    } else if (/^A_FLAC/.test(decodedTrack.rawCodec)) {\n      codec = 'flac';\n    } else if (/^A_OPUS/.test(decodedTrack.rawCodec)) {\n      codec = 'opus';\n    }\n\n    decodedTrack.codec = codec;\n    decodedTracks.push(decodedTrack);\n  });\n  return decodedTracks.sort(function (a, b) {\n    return a.number - b.number;\n  });\n};\nexport var parseData = function parseData(data, tracks) {\n  var allBlocks = [];\n  var segment = findEbml(data, [EBML_TAGS.Segment])[0];\n  var timestampScale = findEbml(segment, [EBML_TAGS.SegmentInfo, EBML_TAGS.TimestampScale])[0]; // in nanoseconds, defaults to 1ms\n\n  if (timestampScale && timestampScale.length) {\n    timestampScale = bytesToNumber(timestampScale);\n  } else {\n    timestampScale = 1000000;\n  }\n\n  var clusters = findEbml(segment, [EBML_TAGS.Cluster]);\n\n  if (!tracks) {\n    tracks = parseTracks(segment);\n  }\n\n  clusters.forEach(function (cluster, ci) {\n    var simpleBlocks = findEbml(cluster, [EBML_TAGS.SimpleBlock]).map(function (b) {\n      return {\n        type: 'simple',\n        data: b\n      };\n    });\n    var blockGroups = findEbml(cluster, [EBML_TAGS.BlockGroup]).map(function (b) {\n      return {\n        type: 'group',\n        data: b\n      };\n    });\n    var timestamp = findEbml(cluster, [EBML_TAGS.Timestamp])[0] || 0;\n\n    if (timestamp && timestamp.length) {\n      timestamp = bytesToNumber(timestamp);\n    } // get all blocks then sort them into the correct order\n\n\n    var blocks = simpleBlocks.concat(blockGroups).sort(function (a, b) {\n      return a.data.byteOffset - b.data.byteOffset;\n    });\n    blocks.forEach(function (block, bi) {\n      var decoded = decodeBlock(block.data, block.type, timestampScale, timestamp);\n      allBlocks.push(decoded);\n    });\n  });\n  return {\n    tracks: tracks,\n    blocks: allBlocks\n  };\n};","import { bytesMatch, toUint8 } from './byte-helpers.js';\nexport var NAL_TYPE_ONE = toUint8([0x00, 0x00, 0x00, 0x01]);\nexport var NAL_TYPE_TWO = toUint8([0x00, 0x00, 0x01]);\nexport var EMULATION_PREVENTION = toUint8([0x00, 0x00, 0x03]);\n/**\n * Expunge any \"Emulation Prevention\" bytes from a \"Raw Byte\n * Sequence Payload\"\n *\n * @param data {Uint8Array} the bytes of a RBSP from a NAL\n * unit\n * @return {Uint8Array} the RBSP without any Emulation\n * Prevention Bytes\n */\n\nexport var discardEmulationPreventionBytes = function discardEmulationPreventionBytes(bytes) {\n  var positions = [];\n  var i = 1; // Find all `Emulation Prevention Bytes`\n\n  while (i < bytes.length - 2) {\n    if (bytesMatch(bytes.subarray(i, i + 3), EMULATION_PREVENTION)) {\n      positions.push(i + 2);\n      i++;\n    }\n\n    i++;\n  } // If no Emulation Prevention Bytes were found just return the original\n  // array\n\n\n  if (positions.length === 0) {\n    return bytes;\n  } // Create a new array to hold the NAL unit data\n\n\n  var newLength = bytes.length - positions.length;\n  var newData = new Uint8Array(newLength);\n  var sourceIndex = 0;\n\n  for (i = 0; i < newLength; sourceIndex++, i++) {\n    if (sourceIndex === positions[0]) {\n      // Skip this byte\n      sourceIndex++; // Remove this position index\n\n      positions.shift();\n    }\n\n    newData[i] = bytes[sourceIndex];\n  }\n\n  return newData;\n};\nexport var findNal = function findNal(bytes, dataType, types, nalLimit) {\n  if (nalLimit === void 0) {\n    nalLimit = Infinity;\n  }\n\n  bytes = toUint8(bytes);\n  types = [].concat(types);\n  var i = 0;\n  var nalStart;\n  var nalsFound = 0; // keep searching until:\n  // we reach the end of bytes\n  // we reach the maximum number of nals they want to seach\n  // NOTE: that we disregard nalLimit when we have found the start\n  // of the nal we want so that we can find the end of the nal we want.\n\n  while (i < bytes.length && (nalsFound < nalLimit || nalStart)) {\n    var nalOffset = void 0;\n\n    if (bytesMatch(bytes.subarray(i), NAL_TYPE_ONE)) {\n      nalOffset = 4;\n    } else if (bytesMatch(bytes.subarray(i), NAL_TYPE_TWO)) {\n      nalOffset = 3;\n    } // we are unsynced,\n    // find the next nal unit\n\n\n    if (!nalOffset) {\n      i++;\n      continue;\n    }\n\n    nalsFound++;\n\n    if (nalStart) {\n      return discardEmulationPreventionBytes(bytes.subarray(nalStart, i));\n    }\n\n    var nalType = void 0;\n\n    if (dataType === 'h264') {\n      nalType = bytes[i + nalOffset] & 0x1f;\n    } else if (dataType === 'h265') {\n      nalType = bytes[i + nalOffset] >> 1 & 0x3f;\n    }\n\n    if (types.indexOf(nalType) !== -1) {\n      nalStart = i + nalOffset;\n    } // nal header is 1 length for h264, and 2 for h265\n\n\n    i += nalOffset + (dataType === 'h264' ? 1 : 2);\n  }\n\n  return bytes.subarray(0, 0);\n};\nexport var findH264Nal = function findH264Nal(bytes, type, nalLimit) {\n  return findNal(bytes, 'h264', type, nalLimit);\n};\nexport var findH265Nal = function findH265Nal(bytes, type, nalLimit) {\n  return findNal(bytes, 'h265', type, nalLimit);\n};","import { toUint8, bytesMatch } from './byte-helpers.js';\nimport { findBox } from './mp4-helpers.js';\nimport { findEbml, EBML_TAGS } from './ebml-helpers.js';\nimport { getId3Offset } from './id3-helpers.js';\nimport { findH264Nal, findH265Nal } from './nal-helpers.js';\nvar CONSTANTS = {\n  // \"webm\" string literal in hex\n  'webm': toUint8([0x77, 0x65, 0x62, 0x6d]),\n  // \"matroska\" string literal in hex\n  'matroska': toUint8([0x6d, 0x61, 0x74, 0x72, 0x6f, 0x73, 0x6b, 0x61]),\n  // \"fLaC\" string literal in hex\n  'flac': toUint8([0x66, 0x4c, 0x61, 0x43]),\n  // \"OggS\" string literal in hex\n  'ogg': toUint8([0x4f, 0x67, 0x67, 0x53]),\n  // ac-3 sync byte, also works for ec-3 as that is simply a codec\n  // of ac-3\n  'ac3': toUint8([0x0b, 0x77]),\n  // \"RIFF\" string literal in hex used for wav and avi\n  'riff': toUint8([0x52, 0x49, 0x46, 0x46]),\n  // \"AVI\" string literal in hex\n  'avi': toUint8([0x41, 0x56, 0x49]),\n  // \"WAVE\" string literal in hex\n  'wav': toUint8([0x57, 0x41, 0x56, 0x45]),\n  // \"ftyp3g\" string literal in hex\n  '3gp': toUint8([0x66, 0x74, 0x79, 0x70, 0x33, 0x67]),\n  // \"ftyp\" string literal in hex\n  'mp4': toUint8([0x66, 0x74, 0x79, 0x70]),\n  // \"styp\" string literal in hex\n  'fmp4': toUint8([0x73, 0x74, 0x79, 0x70]),\n  // \"ftypqt\" string literal in hex\n  'mov': toUint8([0x66, 0x74, 0x79, 0x70, 0x71, 0x74]),\n  // moov string literal in hex\n  'moov': toUint8([0x6D, 0x6F, 0x6F, 0x76]),\n  // moof string literal in hex\n  'moof': toUint8([0x6D, 0x6F, 0x6F, 0x66])\n};\nvar _isLikely = {\n  aac: function aac(bytes) {\n    var offset = getId3Offset(bytes);\n    return bytesMatch(bytes, [0xFF, 0x10], {\n      offset: offset,\n      mask: [0xFF, 0x16]\n    });\n  },\n  mp3: function mp3(bytes) {\n    var offset = getId3Offset(bytes);\n    return bytesMatch(bytes, [0xFF, 0x02], {\n      offset: offset,\n      mask: [0xFF, 0x06]\n    });\n  },\n  webm: function webm(bytes) {\n    var docType = findEbml(bytes, [EBML_TAGS.EBML, EBML_TAGS.DocType])[0]; // check if DocType EBML tag is webm\n\n    return bytesMatch(docType, CONSTANTS.webm);\n  },\n  mkv: function mkv(bytes) {\n    var docType = findEbml(bytes, [EBML_TAGS.EBML, EBML_TAGS.DocType])[0]; // check if DocType EBML tag is matroska\n\n    return bytesMatch(docType, CONSTANTS.matroska);\n  },\n  mp4: function mp4(bytes) {\n    // if this file is another base media file format, it is not mp4\n    if (_isLikely['3gp'](bytes) || _isLikely.mov(bytes)) {\n      return false;\n    } // if this file starts with a ftyp or styp box its mp4\n\n\n    if (bytesMatch(bytes, CONSTANTS.mp4, {\n      offset: 4\n    }) || bytesMatch(bytes, CONSTANTS.fmp4, {\n      offset: 4\n    })) {\n      return true;\n    } // if this file starts with a moof/moov box its mp4\n\n\n    if (bytesMatch(bytes, CONSTANTS.moof, {\n      offset: 4\n    }) || bytesMatch(bytes, CONSTANTS.moov, {\n      offset: 4\n    })) {\n      return true;\n    }\n  },\n  mov: function mov(bytes) {\n    return bytesMatch(bytes, CONSTANTS.mov, {\n      offset: 4\n    });\n  },\n  '3gp': function gp(bytes) {\n    return bytesMatch(bytes, CONSTANTS['3gp'], {\n      offset: 4\n    });\n  },\n  ac3: function ac3(bytes) {\n    var offset = getId3Offset(bytes);\n    return bytesMatch(bytes, CONSTANTS.ac3, {\n      offset: offset\n    });\n  },\n  ts: function ts(bytes) {\n    if (bytes.length < 189 && bytes.length >= 1) {\n      return bytes[0] === 0x47;\n    }\n\n    var i = 0; // check the first 376 bytes for two matching sync bytes\n\n    while (i + 188 < bytes.length && i < 188) {\n      if (bytes[i] === 0x47 && bytes[i + 188] === 0x47) {\n        return true;\n      }\n\n      i += 1;\n    }\n\n    return false;\n  },\n  flac: function flac(bytes) {\n    var offset = getId3Offset(bytes);\n    return bytesMatch(bytes, CONSTANTS.flac, {\n      offset: offset\n    });\n  },\n  ogg: function ogg(bytes) {\n    return bytesMatch(bytes, CONSTANTS.ogg);\n  },\n  avi: function avi(bytes) {\n    return bytesMatch(bytes, CONSTANTS.riff) && bytesMatch(bytes, CONSTANTS.avi, {\n      offset: 8\n    });\n  },\n  wav: function wav(bytes) {\n    return bytesMatch(bytes, CONSTANTS.riff) && bytesMatch(bytes, CONSTANTS.wav, {\n      offset: 8\n    });\n  },\n  'h264': function h264(bytes) {\n    // find seq_parameter_set_rbsp\n    return findH264Nal(bytes, 7, 3).length;\n  },\n  'h265': function h265(bytes) {\n    // find video_parameter_set_rbsp or seq_parameter_set_rbsp\n    return findH265Nal(bytes, [32, 33], 3).length;\n  }\n}; // get all the isLikely functions\n// but make sure 'ts' is above h264 and h265\n// but below everything else as it is the least specific\n\nvar isLikelyTypes = Object.keys(_isLikely) // remove ts, h264, h265\n.filter(function (t) {\n  return t !== 'ts' && t !== 'h264' && t !== 'h265';\n}) // add it back to the bottom\n.concat(['ts', 'h264', 'h265']); // make sure we are dealing with uint8 data.\n\nisLikelyTypes.forEach(function (type) {\n  var isLikelyFn = _isLikely[type];\n\n  _isLikely[type] = function (bytes) {\n    return isLikelyFn(toUint8(bytes));\n  };\n}); // export after wrapping\n\nexport var isLikely = _isLikely; // A useful list of file signatures can be found here\n// https://en.wikipedia.org/wiki/List_of_file_signatures\n\nexport var detectContainerForBytes = function detectContainerForBytes(bytes) {\n  bytes = toUint8(bytes);\n\n  for (var i = 0; i < isLikelyTypes.length; i++) {\n    var type = isLikelyTypes[i];\n\n    if (isLikely[type](bytes)) {\n      return type;\n    }\n  }\n\n  return '';\n}; // fmp4 is not a container\n\nexport var isLikelyFmp4MediaSegment = function isLikelyFmp4MediaSegment(bytes) {\n  return findBox(bytes, ['moof']).length > 0;\n};","/**\n * @license\n * Video.js 7.18.1 <http://videojs.com/>\n * Copyright Brightcove, Inc. <https://www.brightcove.com/>\n * Available under Apache License Version 2.0\n * <https://github.com/videojs/video.js/blob/main/LICENSE>\n *\n * Includes vtt.js <https://github.com/mozilla/vtt.js>\n * Available under Apache License Version 2.0\n * <https://github.com/mozilla/vtt.js/blob/main/LICENSE>\n */\n\nimport window$1 from 'global/window';\nimport document from 'global/document';\nimport _extends from '@babel/runtime/helpers/extends';\nimport keycode from 'keycode';\nimport _assertThisInitialized from '@babel/runtime/helpers/assertThisInitialized';\nimport _inheritsLoose from '@babel/runtime/helpers/inheritsLoose';\nimport safeParseTuple from 'safe-json-parse/tuple';\nimport XHR from '@videojs/xhr';\nimport vtt from 'videojs-vtt.js';\nimport _construct from '@babel/runtime/helpers/construct';\nimport _inherits from '@babel/runtime/helpers/inherits';\nimport _resolveUrl from '@videojs/vhs-utils/es/resolve-url.js';\nimport { Parser } from 'm3u8-parser';\nimport { browserSupportsCodec, DEFAULT_VIDEO_CODEC, DEFAULT_AUDIO_CODEC, muxerSupportsCodec, parseCodecs, translateLegacyCodec, codecsFromDefault, getMimeForCodec, isAudioCodec } from '@videojs/vhs-utils/es/codecs.js';\nimport { simpleTypeFromSourceType } from '@videojs/vhs-utils/es/media-types.js';\nimport { generateSidxKey, parseUTCTiming, parse, addSidxSegmentsToPlaylist } from 'mpd-parser';\nimport parseSidx from 'mux.js/lib/tools/parse-sidx';\nimport { getId3Offset } from '@videojs/vhs-utils/es/id3-helpers';\nimport { detectContainerForBytes, isLikelyFmp4MediaSegment } from '@videojs/vhs-utils/es/containers';\nimport { concatTypedArrays, stringToBytes, toUint8 } from '@videojs/vhs-utils/es/byte-helpers';\nimport { ONE_SECOND_IN_TS } from 'mux.js/lib/utils/clock';\n\nvar version$5 = \"7.18.1\";\n\n/**\n * An Object that contains lifecycle hooks as keys which point to an array\n * of functions that are run when a lifecycle is triggered\n *\n * @private\n */\nvar hooks_ = {};\n/**\n * Get a list of hooks for a specific lifecycle\n *\n * @param  {string} type\n *         the lifecyle to get hooks from\n *\n * @param  {Function|Function[]} [fn]\n *         Optionally add a hook (or hooks) to the lifecycle that your are getting.\n *\n * @return {Array}\n *         an array of hooks, or an empty array if there are none.\n */\n\nvar hooks = function hooks(type, fn) {\n  hooks_[type] = hooks_[type] || [];\n\n  if (fn) {\n    hooks_[type] = hooks_[type].concat(fn);\n  }\n\n  return hooks_[type];\n};\n/**\n * Add a function hook to a specific videojs lifecycle.\n *\n * @param {string} type\n *        the lifecycle to hook the function to.\n *\n * @param {Function|Function[]}\n *        The function or array of functions to attach.\n */\n\n\nvar hook = function hook(type, fn) {\n  hooks(type, fn);\n};\n/**\n * Remove a hook from a specific videojs lifecycle.\n *\n * @param  {string} type\n *         the lifecycle that the function hooked to\n *\n * @param  {Function} fn\n *         The hooked function to remove\n *\n * @return {boolean}\n *         The function that was removed or undef\n */\n\n\nvar removeHook = function removeHook(type, fn) {\n  var index = hooks(type).indexOf(fn);\n\n  if (index <= -1) {\n    return false;\n  }\n\n  hooks_[type] = hooks_[type].slice();\n  hooks_[type].splice(index, 1);\n  return true;\n};\n/**\n * Add a function hook that will only run once to a specific videojs lifecycle.\n *\n * @param {string} type\n *        the lifecycle to hook the function to.\n *\n * @param {Function|Function[]}\n *        The function or array of functions to attach.\n */\n\n\nvar hookOnce = function hookOnce(type, fn) {\n  hooks(type, [].concat(fn).map(function (original) {\n    var wrapper = function wrapper() {\n      removeHook(type, wrapper);\n      return original.apply(void 0, arguments);\n    };\n\n    return wrapper;\n  }));\n};\n\n/**\n * @file fullscreen-api.js\n * @module fullscreen-api\n * @private\n */\n/**\n * Store the browser-specific methods for the fullscreen API.\n *\n * @type {Object}\n * @see [Specification]{@link https://fullscreen.spec.whatwg.org}\n * @see [Map Approach From Screenfull.js]{@link https://github.com/sindresorhus/screenfull.js}\n */\n\nvar FullscreenApi = {\n  prefixed: true\n}; // browser API methods\n\nvar apiMap = [['requestFullscreen', 'exitFullscreen', 'fullscreenElement', 'fullscreenEnabled', 'fullscreenchange', 'fullscreenerror', 'fullscreen'], // WebKit\n['webkitRequestFullscreen', 'webkitExitFullscreen', 'webkitFullscreenElement', 'webkitFullscreenEnabled', 'webkitfullscreenchange', 'webkitfullscreenerror', '-webkit-full-screen'], // Mozilla\n['mozRequestFullScreen', 'mozCancelFullScreen', 'mozFullScreenElement', 'mozFullScreenEnabled', 'mozfullscreenchange', 'mozfullscreenerror', '-moz-full-screen'], // Microsoft\n['msRequestFullscreen', 'msExitFullscreen', 'msFullscreenElement', 'msFullscreenEnabled', 'MSFullscreenChange', 'MSFullscreenError', '-ms-fullscreen']];\nvar specApi = apiMap[0];\nvar browserApi; // determine the supported set of functions\n\nfor (var i = 0; i < apiMap.length; i++) {\n  // check for exitFullscreen function\n  if (apiMap[i][1] in document) {\n    browserApi = apiMap[i];\n    break;\n  }\n} // map the browser API names to the spec API names\n\n\nif (browserApi) {\n  for (var _i = 0; _i < browserApi.length; _i++) {\n    FullscreenApi[specApi[_i]] = browserApi[_i];\n  }\n\n  FullscreenApi.prefixed = browserApi[0] !== specApi[0];\n}\n\n/**\n * @file create-logger.js\n * @module create-logger\n */\n\nvar history = [];\n/**\n * Log messages to the console and history based on the type of message\n *\n * @private\n * @param  {string} type\n *         The name of the console method to use.\n *\n * @param  {Array} args\n *         The arguments to be passed to the matching console method.\n */\n\nvar LogByTypeFactory = function LogByTypeFactory(name, log) {\n  return function (type, level, args) {\n    var lvl = log.levels[level];\n    var lvlRegExp = new RegExp(\"^(\" + lvl + \")$\");\n\n    if (type !== 'log') {\n      // Add the type to the front of the message when it's not \"log\".\n      args.unshift(type.toUpperCase() + ':');\n    } // Add console prefix after adding to history.\n\n\n    args.unshift(name + ':'); // Add a clone of the args at this point to history.\n\n    if (history) {\n      history.push([].concat(args)); // only store 1000 history entries\n\n      var splice = history.length - 1000;\n      history.splice(0, splice > 0 ? splice : 0);\n    } // If there's no console then don't try to output messages, but they will\n    // still be stored in history.\n\n\n    if (!window$1.console) {\n      return;\n    } // Was setting these once outside of this function, but containing them\n    // in the function makes it easier to test cases where console doesn't exist\n    // when the module is executed.\n\n\n    var fn = window$1.console[type];\n\n    if (!fn && type === 'debug') {\n      // Certain browsers don't have support for console.debug. For those, we\n      // should default to the closest comparable log.\n      fn = window$1.console.info || window$1.console.log;\n    } // Bail out if there's no console or if this type is not allowed by the\n    // current logging level.\n\n\n    if (!fn || !lvl || !lvlRegExp.test(type)) {\n      return;\n    }\n\n    fn[Array.isArray(args) ? 'apply' : 'call'](window$1.console, args);\n  };\n};\n\nfunction createLogger$1(name) {\n  // This is the private tracking variable for logging level.\n  var level = 'info'; // the curried logByType bound to the specific log and history\n\n  var logByType;\n  /**\n   * Logs plain debug messages. Similar to `console.log`.\n   *\n   * Due to [limitations](https://github.com/jsdoc3/jsdoc/issues/955#issuecomment-313829149)\n   * of our JSDoc template, we cannot properly document this as both a function\n   * and a namespace, so its function signature is documented here.\n   *\n   * #### Arguments\n   * ##### *args\n   * Mixed[]\n   *\n   * Any combination of values that could be passed to `console.log()`.\n   *\n   * #### Return Value\n   *\n   * `undefined`\n   *\n   * @namespace\n   * @param    {Mixed[]} args\n   *           One or more messages or objects that should be logged.\n   */\n\n  var log = function log() {\n    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n      args[_key] = arguments[_key];\n    }\n\n    logByType('log', level, args);\n  }; // This is the logByType helper that the logging methods below use\n\n\n  logByType = LogByTypeFactory(name, log);\n  /**\n   * Create a new sublogger which chains the old name to the new name.\n   *\n   * For example, doing `videojs.log.createLogger('player')` and then using that logger will log the following:\n   * ```js\n   *  mylogger('foo');\n   *  // > VIDEOJS: player: foo\n   * ```\n   *\n   * @param {string} name\n   *        The name to add call the new logger\n   * @return {Object}\n   */\n\n  log.createLogger = function (subname) {\n    return createLogger$1(name + ': ' + subname);\n  };\n  /**\n   * Enumeration of available logging levels, where the keys are the level names\n   * and the values are `|`-separated strings containing logging methods allowed\n   * in that logging level. These strings are used to create a regular expression\n   * matching the function name being called.\n   *\n   * Levels provided by Video.js are:\n   *\n   * - `off`: Matches no calls. Any value that can be cast to `false` will have\n   *   this effect. The most restrictive.\n   * - `all`: Matches only Video.js-provided functions (`debug`, `log`,\n   *   `log.warn`, and `log.error`).\n   * - `debug`: Matches `log.debug`, `log`, `log.warn`, and `log.error` calls.\n   * - `info` (default): Matches `log`, `log.warn`, and `log.error` calls.\n   * - `warn`: Matches `log.warn` and `log.error` calls.\n   * - `error`: Matches only `log.error` calls.\n   *\n   * @type {Object}\n   */\n\n\n  log.levels = {\n    all: 'debug|log|warn|error',\n    off: '',\n    debug: 'debug|log|warn|error',\n    info: 'log|warn|error',\n    warn: 'warn|error',\n    error: 'error',\n    DEFAULT: level\n  };\n  /**\n   * Get or set the current logging level.\n   *\n   * If a string matching a key from {@link module:log.levels} is provided, acts\n   * as a setter.\n   *\n   * @param  {string} [lvl]\n   *         Pass a valid level to set a new logging level.\n   *\n   * @return {string}\n   *         The current logging level.\n   */\n\n  log.level = function (lvl) {\n    if (typeof lvl === 'string') {\n      if (!log.levels.hasOwnProperty(lvl)) {\n        throw new Error(\"\\\"\" + lvl + \"\\\" in not a valid log level\");\n      }\n\n      level = lvl;\n    }\n\n    return level;\n  };\n  /**\n   * Returns an array containing everything that has been logged to the history.\n   *\n   * This array is a shallow clone of the internal history record. However, its\n   * contents are _not_ cloned; so, mutating objects inside this array will\n   * mutate them in history.\n   *\n   * @return {Array}\n   */\n\n\n  log.history = function () {\n    return history ? [].concat(history) : [];\n  };\n  /**\n   * Allows you to filter the history by the given logger name\n   *\n   * @param {string} fname\n   *        The name to filter by\n   *\n   * @return {Array}\n   *         The filtered list to return\n   */\n\n\n  log.history.filter = function (fname) {\n    return (history || []).filter(function (historyItem) {\n      // if the first item in each historyItem includes `fname`, then it's a match\n      return new RegExp(\".*\" + fname + \".*\").test(historyItem[0]);\n    });\n  };\n  /**\n   * Clears the internal history tracking, but does not prevent further history\n   * tracking.\n   */\n\n\n  log.history.clear = function () {\n    if (history) {\n      history.length = 0;\n    }\n  };\n  /**\n   * Disable history tracking if it is currently enabled.\n   */\n\n\n  log.history.disable = function () {\n    if (history !== null) {\n      history.length = 0;\n      history = null;\n    }\n  };\n  /**\n   * Enable history tracking if it is currently disabled.\n   */\n\n\n  log.history.enable = function () {\n    if (history === null) {\n      history = [];\n    }\n  };\n  /**\n   * Logs error messages. Similar to `console.error`.\n   *\n   * @param {Mixed[]} args\n   *        One or more messages or objects that should be logged as an error\n   */\n\n\n  log.error = function () {\n    for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {\n      args[_key2] = arguments[_key2];\n    }\n\n    return logByType('error', level, args);\n  };\n  /**\n   * Logs warning messages. Similar to `console.warn`.\n   *\n   * @param {Mixed[]} args\n   *        One or more messages or objects that should be logged as a warning.\n   */\n\n\n  log.warn = function () {\n    for (var _len3 = arguments.length, args = new Array(_len3), _key3 = 0; _key3 < _len3; _key3++) {\n      args[_key3] = arguments[_key3];\n    }\n\n    return logByType('warn', level, args);\n  };\n  /**\n   * Logs debug messages. Similar to `console.debug`, but may also act as a comparable\n   * log if `console.debug` is not available\n   *\n   * @param {Mixed[]} args\n   *        One or more messages or objects that should be logged as debug.\n   */\n\n\n  log.debug = function () {\n    for (var _len4 = arguments.length, args = new Array(_len4), _key4 = 0; _key4 < _len4; _key4++) {\n      args[_key4] = arguments[_key4];\n    }\n\n    return logByType('debug', level, args);\n  };\n\n  return log;\n}\n\n/**\n * @file log.js\n * @module log\n */\nvar log$1 = createLogger$1('VIDEOJS');\nvar createLogger = log$1.createLogger;\n\n/**\n * @file obj.js\n * @module obj\n */\n\n/**\n * @callback obj:EachCallback\n *\n * @param {Mixed} value\n *        The current key for the object that is being iterated over.\n *\n * @param {string} key\n *        The current key-value for object that is being iterated over\n */\n\n/**\n * @callback obj:ReduceCallback\n *\n * @param {Mixed} accum\n *        The value that is accumulating over the reduce loop.\n *\n * @param {Mixed} value\n *        The current key for the object that is being iterated over.\n *\n * @param {string} key\n *        The current key-value for object that is being iterated over\n *\n * @return {Mixed}\n *         The new accumulated value.\n */\nvar toString = Object.prototype.toString;\n/**\n * Get the keys of an Object\n *\n * @param {Object}\n *        The Object to get the keys from\n *\n * @return {string[]}\n *         An array of the keys from the object. Returns an empty array if the\n *         object passed in was invalid or had no keys.\n *\n * @private\n */\n\nvar keys = function keys(object) {\n  return isObject(object) ? Object.keys(object) : [];\n};\n/**\n * Array-like iteration for objects.\n *\n * @param {Object} object\n *        The object to iterate over\n *\n * @param {obj:EachCallback} fn\n *        The callback function which is called for each key in the object.\n */\n\n\nfunction each(object, fn) {\n  keys(object).forEach(function (key) {\n    return fn(object[key], key);\n  });\n}\n/**\n * Array-like reduce for objects.\n *\n * @param {Object} object\n *        The Object that you want to reduce.\n *\n * @param {Function} fn\n *         A callback function which is called for each key in the object. It\n *         receives the accumulated value and the per-iteration value and key\n *         as arguments.\n *\n * @param {Mixed} [initial = 0]\n *        Starting value\n *\n * @return {Mixed}\n *         The final accumulated value.\n */\n\nfunction reduce(object, fn, initial) {\n  if (initial === void 0) {\n    initial = 0;\n  }\n\n  return keys(object).reduce(function (accum, key) {\n    return fn(accum, object[key], key);\n  }, initial);\n}\n/**\n * Object.assign-style object shallow merge/extend.\n *\n * @param  {Object} target\n * @param  {Object} ...sources\n * @return {Object}\n */\n\nfunction assign(target) {\n  for (var _len = arguments.length, sources = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {\n    sources[_key - 1] = arguments[_key];\n  }\n\n  if (Object.assign) {\n    return _extends.apply(void 0, [target].concat(sources));\n  }\n\n  sources.forEach(function (source) {\n    if (!source) {\n      return;\n    }\n\n    each(source, function (value, key) {\n      target[key] = value;\n    });\n  });\n  return target;\n}\n/**\n * Returns whether a value is an object of any kind - including DOM nodes,\n * arrays, regular expressions, etc. Not functions, though.\n *\n * This avoids the gotcha where using `typeof` on a `null` value\n * results in `'object'`.\n *\n * @param  {Object} value\n * @return {boolean}\n */\n\nfunction isObject(value) {\n  return !!value && typeof value === 'object';\n}\n/**\n * Returns whether an object appears to be a \"plain\" object - that is, a\n * direct instance of `Object`.\n *\n * @param  {Object} value\n * @return {boolean}\n */\n\nfunction isPlain(value) {\n  return isObject(value) && toString.call(value) === '[object Object]' && value.constructor === Object;\n}\n\n/**\n * @file computed-style.js\n * @module computed-style\n */\n/**\n * A safe getComputedStyle.\n *\n * This is needed because in Firefox, if the player is loaded in an iframe with\n * `display:none`, then `getComputedStyle` returns `null`, so, we do a\n * null-check to make sure that the player doesn't break in these cases.\n *\n * @function\n * @param    {Element} el\n *           The element you want the computed style of\n *\n * @param    {string} prop\n *           The property name you want\n *\n * @see      https://bugzilla.mozilla.org/show_bug.cgi?id=548397\n */\n\nfunction computedStyle(el, prop) {\n  if (!el || !prop) {\n    return '';\n  }\n\n  if (typeof window$1.getComputedStyle === 'function') {\n    var computedStyleValue;\n\n    try {\n      computedStyleValue = window$1.getComputedStyle(el);\n    } catch (e) {\n      return '';\n    }\n\n    return computedStyleValue ? computedStyleValue.getPropertyValue(prop) || computedStyleValue[prop] : '';\n  }\n\n  return '';\n}\n\n/**\n * @file browser.js\n * @module browser\n */\nvar USER_AGENT = window$1.navigator && window$1.navigator.userAgent || '';\nvar webkitVersionMap = /AppleWebKit\\/([\\d.]+)/i.exec(USER_AGENT);\nvar appleWebkitVersion = webkitVersionMap ? parseFloat(webkitVersionMap.pop()) : null;\n/**\n * Whether or not this device is an iPod.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_IPOD = /iPod/i.test(USER_AGENT);\n/**\n * The detected iOS version - or `null`.\n *\n * @static\n * @const\n * @type {string|null}\n */\n\nvar IOS_VERSION = function () {\n  var match = USER_AGENT.match(/OS (\\d+)_/i);\n\n  if (match && match[1]) {\n    return match[1];\n  }\n\n  return null;\n}();\n/**\n * Whether or not this is an Android device.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_ANDROID = /Android/i.test(USER_AGENT);\n/**\n * The detected Android version - or `null`.\n *\n * @static\n * @const\n * @type {number|string|null}\n */\n\nvar ANDROID_VERSION = function () {\n  // This matches Android Major.Minor.Patch versions\n  // ANDROID_VERSION is Major.Minor as a Number, if Minor isn't available, then only Major is returned\n  var match = USER_AGENT.match(/Android (\\d+)(?:\\.(\\d+))?(?:\\.(\\d+))*/i);\n\n  if (!match) {\n    return null;\n  }\n\n  var major = match[1] && parseFloat(match[1]);\n  var minor = match[2] && parseFloat(match[2]);\n\n  if (major && minor) {\n    return parseFloat(match[1] + '.' + match[2]);\n  } else if (major) {\n    return major;\n  }\n\n  return null;\n}();\n/**\n * Whether or not this is a native Android browser.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_NATIVE_ANDROID = IS_ANDROID && ANDROID_VERSION < 5 && appleWebkitVersion < 537;\n/**\n * Whether or not this is Mozilla Firefox.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_FIREFOX = /Firefox/i.test(USER_AGENT);\n/**\n * Whether or not this is Microsoft Edge.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_EDGE = /Edg/i.test(USER_AGENT);\n/**\n * Whether or not this is Google Chrome.\n *\n * This will also be `true` for Chrome on iOS, which will have different support\n * as it is actually Safari under the hood.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_CHROME = !IS_EDGE && (/Chrome/i.test(USER_AGENT) || /CriOS/i.test(USER_AGENT));\n/**\n * The detected Google Chrome version - or `null`.\n *\n * @static\n * @const\n * @type {number|null}\n */\n\nvar CHROME_VERSION = function () {\n  var match = USER_AGENT.match(/(Chrome|CriOS)\\/(\\d+)/);\n\n  if (match && match[2]) {\n    return parseFloat(match[2]);\n  }\n\n  return null;\n}();\n/**\n * The detected Internet Explorer version - or `null`.\n *\n * @static\n * @const\n * @type {number|null}\n */\n\nvar IE_VERSION = function () {\n  var result = /MSIE\\s(\\d+)\\.\\d/.exec(USER_AGENT);\n  var version = result && parseFloat(result[1]);\n\n  if (!version && /Trident\\/7.0/i.test(USER_AGENT) && /rv:11.0/.test(USER_AGENT)) {\n    // IE 11 has a different user agent string than other IE versions\n    version = 11.0;\n  }\n\n  return version;\n}();\n/**\n * Whether or not this is desktop Safari.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_SAFARI = /Safari/i.test(USER_AGENT) && !IS_CHROME && !IS_ANDROID && !IS_EDGE;\n/**\n * Whether or not this is a Windows machine.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_WINDOWS = /Windows/i.test(USER_AGENT);\n/**\n * Whether or not this device is touch-enabled.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar TOUCH_ENABLED = Boolean(isReal() && ('ontouchstart' in window$1 || window$1.navigator.maxTouchPoints || window$1.DocumentTouch && window$1.document instanceof window$1.DocumentTouch));\n/**\n * Whether or not this device is an iPad.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_IPAD = /iPad/i.test(USER_AGENT) || IS_SAFARI && TOUCH_ENABLED && !/iPhone/i.test(USER_AGENT);\n/**\n * Whether or not this device is an iPhone.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n// The Facebook app's UIWebView identifies as both an iPhone and iPad, so\n// to identify iPhones, we need to exclude iPads.\n// http://artsy.github.io/blog/2012/10/18/the-perils-of-ios-user-agent-sniffing/\n\nvar IS_IPHONE = /iPhone/i.test(USER_AGENT) && !IS_IPAD;\n/**\n * Whether or not this is an iOS device.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_IOS = IS_IPHONE || IS_IPAD || IS_IPOD;\n/**\n * Whether or not this is any flavor of Safari - including iOS.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_ANY_SAFARI = (IS_SAFARI || IS_IOS) && !IS_CHROME;\n\nvar browser = /*#__PURE__*/Object.freeze({\n  __proto__: null,\n  IS_IPOD: IS_IPOD,\n  IOS_VERSION: IOS_VERSION,\n  IS_ANDROID: IS_ANDROID,\n  ANDROID_VERSION: ANDROID_VERSION,\n  IS_NATIVE_ANDROID: IS_NATIVE_ANDROID,\n  IS_FIREFOX: IS_FIREFOX,\n  IS_EDGE: IS_EDGE,\n  IS_CHROME: IS_CHROME,\n  CHROME_VERSION: CHROME_VERSION,\n  IE_VERSION: IE_VERSION,\n  IS_SAFARI: IS_SAFARI,\n  IS_WINDOWS: IS_WINDOWS,\n  TOUCH_ENABLED: TOUCH_ENABLED,\n  IS_IPAD: IS_IPAD,\n  IS_IPHONE: IS_IPHONE,\n  IS_IOS: IS_IOS,\n  IS_ANY_SAFARI: IS_ANY_SAFARI\n});\n\n/**\n * @file dom.js\n * @module dom\n */\n/**\n * Detect if a value is a string with any non-whitespace characters.\n *\n * @private\n * @param  {string} str\n *         The string to check\n *\n * @return {boolean}\n *         Will be `true` if the string is non-blank, `false` otherwise.\n *\n */\n\nfunction isNonBlankString(str) {\n  // we use str.trim as it will trim any whitespace characters\n  // from the front or back of non-whitespace characters. aka\n  // Any string that contains non-whitespace characters will\n  // still contain them after `trim` but whitespace only strings\n  // will have a length of 0, failing this check.\n  return typeof str === 'string' && Boolean(str.trim());\n}\n/**\n * Throws an error if the passed string has whitespace. This is used by\n * class methods to be relatively consistent with the classList API.\n *\n * @private\n * @param  {string} str\n *         The string to check for whitespace.\n *\n * @throws {Error}\n *         Throws an error if there is whitespace in the string.\n */\n\n\nfunction throwIfWhitespace(str) {\n  // str.indexOf instead of regex because str.indexOf is faster performance wise.\n  if (str.indexOf(' ') >= 0) {\n    throw new Error('class has illegal whitespace characters');\n  }\n}\n/**\n * Produce a regular expression for matching a className within an elements className.\n *\n * @private\n * @param  {string} className\n *         The className to generate the RegExp for.\n *\n * @return {RegExp}\n *         The RegExp that will check for a specific `className` in an elements\n *         className.\n */\n\n\nfunction classRegExp(className) {\n  return new RegExp('(^|\\\\s)' + className + '($|\\\\s)');\n}\n/**\n * Whether the current DOM interface appears to be real (i.e. not simulated).\n *\n * @return {boolean}\n *         Will be `true` if the DOM appears to be real, `false` otherwise.\n */\n\n\nfunction isReal() {\n  // Both document and window will never be undefined thanks to `global`.\n  return document === window$1.document;\n}\n/**\n * Determines, via duck typing, whether or not a value is a DOM element.\n *\n * @param  {Mixed} value\n *         The value to check.\n *\n * @return {boolean}\n *         Will be `true` if the value is a DOM element, `false` otherwise.\n */\n\nfunction isEl(value) {\n  return isObject(value) && value.nodeType === 1;\n}\n/**\n * Determines if the current DOM is embedded in an iframe.\n *\n * @return {boolean}\n *         Will be `true` if the DOM is embedded in an iframe, `false`\n *         otherwise.\n */\n\nfunction isInFrame() {\n  // We need a try/catch here because Safari will throw errors when attempting\n  // to get either `parent` or `self`\n  try {\n    return window$1.parent !== window$1.self;\n  } catch (x) {\n    return true;\n  }\n}\n/**\n * Creates functions to query the DOM using a given method.\n *\n * @private\n * @param   {string} method\n *          The method to create the query with.\n *\n * @return  {Function}\n *          The query method\n */\n\nfunction createQuerier(method) {\n  return function (selector, context) {\n    if (!isNonBlankString(selector)) {\n      return document[method](null);\n    }\n\n    if (isNonBlankString(context)) {\n      context = document.querySelector(context);\n    }\n\n    var ctx = isEl(context) ? context : document;\n    return ctx[method] && ctx[method](selector);\n  };\n}\n/**\n * Creates an element and applies properties, attributes, and inserts content.\n *\n * @param  {string} [tagName='div']\n *         Name of tag to be created.\n *\n * @param  {Object} [properties={}]\n *         Element properties to be applied.\n *\n * @param  {Object} [attributes={}]\n *         Element attributes to be applied.\n *\n * @param {module:dom~ContentDescriptor} content\n *        A content descriptor object.\n *\n * @return {Element}\n *         The element that was created.\n */\n\n\nfunction createEl(tagName, properties, attributes, content) {\n  if (tagName === void 0) {\n    tagName = 'div';\n  }\n\n  if (properties === void 0) {\n    properties = {};\n  }\n\n  if (attributes === void 0) {\n    attributes = {};\n  }\n\n  var el = document.createElement(tagName);\n  Object.getOwnPropertyNames(properties).forEach(function (propName) {\n    var val = properties[propName]; // See #2176\n    // We originally were accepting both properties and attributes in the\n    // same object, but that doesn't work so well.\n\n    if (propName.indexOf('aria-') !== -1 || propName === 'role' || propName === 'type') {\n      log$1.warn('Setting attributes in the second argument of createEl()\\n' + 'has been deprecated. Use the third argument instead.\\n' + (\"createEl(type, properties, attributes). Attempting to set \" + propName + \" to \" + val + \".\"));\n      el.setAttribute(propName, val); // Handle textContent since it's not supported everywhere and we have a\n      // method for it.\n    } else if (propName === 'textContent') {\n      textContent(el, val);\n    } else if (el[propName] !== val || propName === 'tabIndex') {\n      el[propName] = val;\n    }\n  });\n  Object.getOwnPropertyNames(attributes).forEach(function (attrName) {\n    el.setAttribute(attrName, attributes[attrName]);\n  });\n\n  if (content) {\n    appendContent(el, content);\n  }\n\n  return el;\n}\n/**\n * Injects text into an element, replacing any existing contents entirely.\n *\n * @param  {Element} el\n *         The element to add text content into\n *\n * @param  {string} text\n *         The text content to add.\n *\n * @return {Element}\n *         The element with added text content.\n */\n\nfunction textContent(el, text) {\n  if (typeof el.textContent === 'undefined') {\n    el.innerText = text;\n  } else {\n    el.textContent = text;\n  }\n\n  return el;\n}\n/**\n * Insert an element as the first child node of another\n *\n * @param {Element} child\n *        Element to insert\n *\n * @param {Element} parent\n *        Element to insert child into\n */\n\nfunction prependTo(child, parent) {\n  if (parent.firstChild) {\n    parent.insertBefore(child, parent.firstChild);\n  } else {\n    parent.appendChild(child);\n  }\n}\n/**\n * Check if an element has a class name.\n *\n * @param  {Element} element\n *         Element to check\n *\n * @param  {string} classToCheck\n *         Class name to check for\n *\n * @return {boolean}\n *         Will be `true` if the element has a class, `false` otherwise.\n *\n * @throws {Error}\n *         Throws an error if `classToCheck` has white space.\n */\n\nfunction hasClass(element, classToCheck) {\n  throwIfWhitespace(classToCheck);\n\n  if (element.classList) {\n    return element.classList.contains(classToCheck);\n  }\n\n  return classRegExp(classToCheck).test(element.className);\n}\n/**\n * Add a class name to an element.\n *\n * @param  {Element} element\n *         Element to add class name to.\n *\n * @param  {string} classToAdd\n *         Class name to add.\n *\n * @return {Element}\n *         The DOM element with the added class name.\n */\n\nfunction addClass(element, classToAdd) {\n  if (element.classList) {\n    element.classList.add(classToAdd); // Don't need to `throwIfWhitespace` here because `hasElClass` will do it\n    // in the case of classList not being supported.\n  } else if (!hasClass(element, classToAdd)) {\n    element.className = (element.className + ' ' + classToAdd).trim();\n  }\n\n  return element;\n}\n/**\n * Remove a class name from an element.\n *\n * @param  {Element} element\n *         Element to remove a class name from.\n *\n * @param  {string} classToRemove\n *         Class name to remove\n *\n * @return {Element}\n *         The DOM element with class name removed.\n */\n\nfunction removeClass(element, classToRemove) {\n  // Protect in case the player gets disposed\n  if (!element) {\n    log$1.warn(\"removeClass was called with an element that doesn't exist\");\n    return null;\n  }\n\n  if (element.classList) {\n    element.classList.remove(classToRemove);\n  } else {\n    throwIfWhitespace(classToRemove);\n    element.className = element.className.split(/\\s+/).filter(function (c) {\n      return c !== classToRemove;\n    }).join(' ');\n  }\n\n  return element;\n}\n/**\n * The callback definition for toggleClass.\n *\n * @callback module:dom~PredicateCallback\n * @param    {Element} element\n *           The DOM element of the Component.\n *\n * @param    {string} classToToggle\n *           The `className` that wants to be toggled\n *\n * @return   {boolean|undefined}\n *           If `true` is returned, the `classToToggle` will be added to the\n *           `element`. If `false`, the `classToToggle` will be removed from\n *           the `element`. If `undefined`, the callback will be ignored.\n */\n\n/**\n * Adds or removes a class name to/from an element depending on an optional\n * condition or the presence/absence of the class name.\n *\n * @param  {Element} element\n *         The element to toggle a class name on.\n *\n * @param  {string} classToToggle\n *         The class that should be toggled.\n *\n * @param  {boolean|module:dom~PredicateCallback} [predicate]\n *         See the return value for {@link module:dom~PredicateCallback}\n *\n * @return {Element}\n *         The element with a class that has been toggled.\n */\n\nfunction toggleClass(element, classToToggle, predicate) {\n  // This CANNOT use `classList` internally because IE11 does not support the\n  // second parameter to the `classList.toggle()` method! Which is fine because\n  // `classList` will be used by the add/remove functions.\n  var has = hasClass(element, classToToggle);\n\n  if (typeof predicate === 'function') {\n    predicate = predicate(element, classToToggle);\n  }\n\n  if (typeof predicate !== 'boolean') {\n    predicate = !has;\n  } // If the necessary class operation matches the current state of the\n  // element, no action is required.\n\n\n  if (predicate === has) {\n    return;\n  }\n\n  if (predicate) {\n    addClass(element, classToToggle);\n  } else {\n    removeClass(element, classToToggle);\n  }\n\n  return element;\n}\n/**\n * Apply attributes to an HTML element.\n *\n * @param {Element} el\n *        Element to add attributes to.\n *\n * @param {Object} [attributes]\n *        Attributes to be applied.\n */\n\nfunction setAttributes(el, attributes) {\n  Object.getOwnPropertyNames(attributes).forEach(function (attrName) {\n    var attrValue = attributes[attrName];\n\n    if (attrValue === null || typeof attrValue === 'undefined' || attrValue === false) {\n      el.removeAttribute(attrName);\n    } else {\n      el.setAttribute(attrName, attrValue === true ? '' : attrValue);\n    }\n  });\n}\n/**\n * Get an element's attribute values, as defined on the HTML tag.\n *\n * Attributes are not the same as properties. They're defined on the tag\n * or with setAttribute.\n *\n * @param  {Element} tag\n *         Element from which to get tag attributes.\n *\n * @return {Object}\n *         All attributes of the element. Boolean attributes will be `true` or\n *         `false`, others will be strings.\n */\n\nfunction getAttributes(tag) {\n  var obj = {}; // known boolean attributes\n  // we can check for matching boolean properties, but not all browsers\n  // and not all tags know about these attributes, so, we still want to check them manually\n\n  var knownBooleans = ',' + 'autoplay,controls,playsinline,loop,muted,default,defaultMuted' + ',';\n\n  if (tag && tag.attributes && tag.attributes.length > 0) {\n    var attrs = tag.attributes;\n\n    for (var i = attrs.length - 1; i >= 0; i--) {\n      var attrName = attrs[i].name;\n      var attrVal = attrs[i].value; // check for known booleans\n      // the matching element property will return a value for typeof\n\n      if (typeof tag[attrName] === 'boolean' || knownBooleans.indexOf(',' + attrName + ',') !== -1) {\n        // the value of an included boolean attribute is typically an empty\n        // string ('') which would equal false if we just check for a false value.\n        // we also don't want support bad code like autoplay='false'\n        attrVal = attrVal !== null ? true : false;\n      }\n\n      obj[attrName] = attrVal;\n    }\n  }\n\n  return obj;\n}\n/**\n * Get the value of an element's attribute.\n *\n * @param {Element} el\n *        A DOM element.\n *\n * @param {string} attribute\n *        Attribute to get the value of.\n *\n * @return {string}\n *         The value of the attribute.\n */\n\nfunction getAttribute(el, attribute) {\n  return el.getAttribute(attribute);\n}\n/**\n * Set the value of an element's attribute.\n *\n * @param {Element} el\n *        A DOM element.\n *\n * @param {string} attribute\n *        Attribute to set.\n *\n * @param {string} value\n *        Value to set the attribute to.\n */\n\nfunction setAttribute(el, attribute, value) {\n  el.setAttribute(attribute, value);\n}\n/**\n * Remove an element's attribute.\n *\n * @param {Element} el\n *        A DOM element.\n *\n * @param {string} attribute\n *        Attribute to remove.\n */\n\nfunction removeAttribute(el, attribute) {\n  el.removeAttribute(attribute);\n}\n/**\n * Attempt to block the ability to select text.\n */\n\nfunction blockTextSelection() {\n  document.body.focus();\n\n  document.onselectstart = function () {\n    return false;\n  };\n}\n/**\n * Turn off text selection blocking.\n */\n\nfunction unblockTextSelection() {\n  document.onselectstart = function () {\n    return true;\n  };\n}\n/**\n * Identical to the native `getBoundingClientRect` function, but ensures that\n * the method is supported at all (it is in all browsers we claim to support)\n * and that the element is in the DOM before continuing.\n *\n * This wrapper function also shims properties which are not provided by some\n * older browsers (namely, IE8).\n *\n * Additionally, some browsers do not support adding properties to a\n * `ClientRect`/`DOMRect` object; so, we shallow-copy it with the standard\n * properties (except `x` and `y` which are not widely supported). This helps\n * avoid implementations where keys are non-enumerable.\n *\n * @param  {Element} el\n *         Element whose `ClientRect` we want to calculate.\n *\n * @return {Object|undefined}\n *         Always returns a plain object - or `undefined` if it cannot.\n */\n\nfunction getBoundingClientRect(el) {\n  if (el && el.getBoundingClientRect && el.parentNode) {\n    var rect = el.getBoundingClientRect();\n    var result = {};\n    ['bottom', 'height', 'left', 'right', 'top', 'width'].forEach(function (k) {\n      if (rect[k] !== undefined) {\n        result[k] = rect[k];\n      }\n    });\n\n    if (!result.height) {\n      result.height = parseFloat(computedStyle(el, 'height'));\n    }\n\n    if (!result.width) {\n      result.width = parseFloat(computedStyle(el, 'width'));\n    }\n\n    return result;\n  }\n}\n/**\n * Represents the position of a DOM element on the page.\n *\n * @typedef  {Object} module:dom~Position\n *\n * @property {number} left\n *           Pixels to the left.\n *\n * @property {number} top\n *           Pixels from the top.\n */\n\n/**\n * Get the position of an element in the DOM.\n *\n * Uses `getBoundingClientRect` technique from John Resig.\n *\n * @see http://ejohn.org/blog/getboundingclientrect-is-awesome/\n *\n * @param  {Element} el\n *         Element from which to get offset.\n *\n * @return {module:dom~Position}\n *         The position of the element that was passed in.\n */\n\nfunction findPosition(el) {\n  if (!el || el && !el.offsetParent) {\n    return {\n      left: 0,\n      top: 0,\n      width: 0,\n      height: 0\n    };\n  }\n\n  var width = el.offsetWidth;\n  var height = el.offsetHeight;\n  var left = 0;\n  var top = 0;\n\n  while (el.offsetParent && el !== document[FullscreenApi.fullscreenElement]) {\n    left += el.offsetLeft;\n    top += el.offsetTop;\n    el = el.offsetParent;\n  }\n\n  return {\n    left: left,\n    top: top,\n    width: width,\n    height: height\n  };\n}\n/**\n * Represents x and y coordinates for a DOM element or mouse pointer.\n *\n * @typedef  {Object} module:dom~Coordinates\n *\n * @property {number} x\n *           x coordinate in pixels\n *\n * @property {number} y\n *           y coordinate in pixels\n */\n\n/**\n * Get the pointer position within an element.\n *\n * The base on the coordinates are the bottom left of the element.\n *\n * @param  {Element} el\n *         Element on which to get the pointer position on.\n *\n * @param  {EventTarget~Event} event\n *         Event object.\n *\n * @return {module:dom~Coordinates}\n *         A coordinates object corresponding to the mouse position.\n *\n */\n\nfunction getPointerPosition(el, event) {\n  var translated = {\n    x: 0,\n    y: 0\n  };\n\n  if (IS_IOS) {\n    var item = el;\n\n    while (item && item.nodeName.toLowerCase() !== 'html') {\n      var transform = computedStyle(item, 'transform');\n\n      if (/^matrix/.test(transform)) {\n        var values = transform.slice(7, -1).split(/,\\s/).map(Number);\n        translated.x += values[4];\n        translated.y += values[5];\n      } else if (/^matrix3d/.test(transform)) {\n        var _values = transform.slice(9, -1).split(/,\\s/).map(Number);\n\n        translated.x += _values[12];\n        translated.y += _values[13];\n      }\n\n      item = item.parentNode;\n    }\n  }\n\n  var position = {};\n  var boxTarget = findPosition(event.target);\n  var box = findPosition(el);\n  var boxW = box.width;\n  var boxH = box.height;\n  var offsetY = event.offsetY - (box.top - boxTarget.top);\n  var offsetX = event.offsetX - (box.left - boxTarget.left);\n\n  if (event.changedTouches) {\n    offsetX = event.changedTouches[0].pageX - box.left;\n    offsetY = event.changedTouches[0].pageY + box.top;\n\n    if (IS_IOS) {\n      offsetX -= translated.x;\n      offsetY -= translated.y;\n    }\n  }\n\n  position.y = 1 - Math.max(0, Math.min(1, offsetY / boxH));\n  position.x = Math.max(0, Math.min(1, offsetX / boxW));\n  return position;\n}\n/**\n * Determines, via duck typing, whether or not a value is a text node.\n *\n * @param  {Mixed} value\n *         Check if this value is a text node.\n *\n * @return {boolean}\n *         Will be `true` if the value is a text node, `false` otherwise.\n */\n\nfunction isTextNode(value) {\n  return isObject(value) && value.nodeType === 3;\n}\n/**\n * Empties the contents of an element.\n *\n * @param  {Element} el\n *         The element to empty children from\n *\n * @return {Element}\n *         The element with no children\n */\n\nfunction emptyEl(el) {\n  while (el.firstChild) {\n    el.removeChild(el.firstChild);\n  }\n\n  return el;\n}\n/**\n * This is a mixed value that describes content to be injected into the DOM\n * via some method. It can be of the following types:\n *\n * Type       | Description\n * -----------|-------------\n * `string`   | The value will be normalized into a text node.\n * `Element`  | The value will be accepted as-is.\n * `TextNode` | The value will be accepted as-is.\n * `Array`    | A one-dimensional array of strings, elements, text nodes, or functions. These functions should return a string, element, or text node (any other return value, like an array, will be ignored).\n * `Function` | A function, which is expected to return a string, element, text node, or array - any of the other possible values described above. This means that a content descriptor could be a function that returns an array of functions, but those second-level functions must return strings, elements, or text nodes.\n *\n * @typedef {string|Element|TextNode|Array|Function} module:dom~ContentDescriptor\n */\n\n/**\n * Normalizes content for eventual insertion into the DOM.\n *\n * This allows a wide range of content definition methods, but helps protect\n * from falling into the trap of simply writing to `innerHTML`, which could\n * be an XSS concern.\n *\n * The content for an element can be passed in multiple types and\n * combinations, whose behavior is as follows:\n *\n * @param {module:dom~ContentDescriptor} content\n *        A content descriptor value.\n *\n * @return {Array}\n *         All of the content that was passed in, normalized to an array of\n *         elements or text nodes.\n */\n\nfunction normalizeContent(content) {\n  // First, invoke content if it is a function. If it produces an array,\n  // that needs to happen before normalization.\n  if (typeof content === 'function') {\n    content = content();\n  } // Next up, normalize to an array, so one or many items can be normalized,\n  // filtered, and returned.\n\n\n  return (Array.isArray(content) ? content : [content]).map(function (value) {\n    // First, invoke value if it is a function to produce a new value,\n    // which will be subsequently normalized to a Node of some kind.\n    if (typeof value === 'function') {\n      value = value();\n    }\n\n    if (isEl(value) || isTextNode(value)) {\n      return value;\n    }\n\n    if (typeof value === 'string' && /\\S/.test(value)) {\n      return document.createTextNode(value);\n    }\n  }).filter(function (value) {\n    return value;\n  });\n}\n/**\n * Normalizes and appends content to an element.\n *\n * @param  {Element} el\n *         Element to append normalized content to.\n *\n * @param {module:dom~ContentDescriptor} content\n *        A content descriptor value.\n *\n * @return {Element}\n *         The element with appended normalized content.\n */\n\nfunction appendContent(el, content) {\n  normalizeContent(content).forEach(function (node) {\n    return el.appendChild(node);\n  });\n  return el;\n}\n/**\n * Normalizes and inserts content into an element; this is identical to\n * `appendContent()`, except it empties the element first.\n *\n * @param {Element} el\n *        Element to insert normalized content into.\n *\n * @param {module:dom~ContentDescriptor} content\n *        A content descriptor value.\n *\n * @return {Element}\n *         The element with inserted normalized content.\n */\n\nfunction insertContent(el, content) {\n  return appendContent(emptyEl(el), content);\n}\n/**\n * Check if an event was a single left click.\n *\n * @param  {EventTarget~Event} event\n *         Event object.\n *\n * @return {boolean}\n *         Will be `true` if a single left click, `false` otherwise.\n */\n\nfunction isSingleLeftClick(event) {\n  // Note: if you create something draggable, be sure to\n  // call it on both `mousedown` and `mousemove` event,\n  // otherwise `mousedown` should be enough for a button\n  if (event.button === undefined && event.buttons === undefined) {\n    // Why do we need `buttons` ?\n    // Because, middle mouse sometimes have this:\n    // e.button === 0 and e.buttons === 4\n    // Furthermore, we want to prevent combination click, something like\n    // HOLD middlemouse then left click, that would be\n    // e.button === 0, e.buttons === 5\n    // just `button` is not gonna work\n    // Alright, then what this block does ?\n    // this is for chrome `simulate mobile devices`\n    // I want to support this as well\n    return true;\n  }\n\n  if (event.button === 0 && event.buttons === undefined) {\n    // Touch screen, sometimes on some specific device, `buttons`\n    // doesn't have anything (safari on ios, blackberry...)\n    return true;\n  } // `mouseup` event on a single left click has\n  // `button` and `buttons` equal to 0\n\n\n  if (event.type === 'mouseup' && event.button === 0 && event.buttons === 0) {\n    return true;\n  }\n\n  if (event.button !== 0 || event.buttons !== 1) {\n    // This is the reason we have those if else block above\n    // if any special case we can catch and let it slide\n    // we do it above, when get to here, this definitely\n    // is-not-left-click\n    return false;\n  }\n\n  return true;\n}\n/**\n * Finds a single DOM element matching `selector` within the optional\n * `context` of another DOM element (defaulting to `document`).\n *\n * @param  {string} selector\n *         A valid CSS selector, which will be passed to `querySelector`.\n *\n * @param  {Element|String} [context=document]\n *         A DOM element within which to query. Can also be a selector\n *         string in which case the first matching element will be used\n *         as context. If missing (or no element matches selector), falls\n *         back to `document`.\n *\n * @return {Element|null}\n *         The element that was found or null.\n */\n\nvar $ = createQuerier('querySelector');\n/**\n * Finds a all DOM elements matching `selector` within the optional\n * `context` of another DOM element (defaulting to `document`).\n *\n * @param  {string} selector\n *         A valid CSS selector, which will be passed to `querySelectorAll`.\n *\n * @param  {Element|String} [context=document]\n *         A DOM element within which to query. Can also be a selector\n *         string in which case the first matching element will be used\n *         as context. If missing (or no element matches selector), falls\n *         back to `document`.\n *\n * @return {NodeList}\n *         A element list of elements that were found. Will be empty if none\n *         were found.\n *\n */\n\nvar $$ = createQuerier('querySelectorAll');\n\nvar Dom = /*#__PURE__*/Object.freeze({\n  __proto__: null,\n  isReal: isReal,\n  isEl: isEl,\n  isInFrame: isInFrame,\n  createEl: createEl,\n  textContent: textContent,\n  prependTo: prependTo,\n  hasClass: hasClass,\n  addClass: addClass,\n  removeClass: removeClass,\n  toggleClass: toggleClass,\n  setAttributes: setAttributes,\n  getAttributes: getAttributes,\n  getAttribute: getAttribute,\n  setAttribute: setAttribute,\n  removeAttribute: removeAttribute,\n  blockTextSelection: blockTextSelection,\n  unblockTextSelection: unblockTextSelection,\n  getBoundingClientRect: getBoundingClientRect,\n  findPosition: findPosition,\n  getPointerPosition: getPointerPosition,\n  isTextNode: isTextNode,\n  emptyEl: emptyEl,\n  normalizeContent: normalizeContent,\n  appendContent: appendContent,\n  insertContent: insertContent,\n  isSingleLeftClick: isSingleLeftClick,\n  $: $,\n  $$: $$\n});\n\n/**\n * @file setup.js - Functions for setting up a player without\n * user interaction based on the data-setup `attribute` of the video tag.\n *\n * @module setup\n */\nvar _windowLoaded = false;\nvar videojs$1;\n/**\n * Set up any tags that have a data-setup `attribute` when the player is started.\n */\n\nvar autoSetup = function autoSetup() {\n  if (videojs$1.options.autoSetup === false) {\n    return;\n  }\n\n  var vids = Array.prototype.slice.call(document.getElementsByTagName('video'));\n  var audios = Array.prototype.slice.call(document.getElementsByTagName('audio'));\n  var divs = Array.prototype.slice.call(document.getElementsByTagName('video-js'));\n  var mediaEls = vids.concat(audios, divs); // Check if any media elements exist\n\n  if (mediaEls && mediaEls.length > 0) {\n    for (var i = 0, e = mediaEls.length; i < e; i++) {\n      var mediaEl = mediaEls[i]; // Check if element exists, has getAttribute func.\n\n      if (mediaEl && mediaEl.getAttribute) {\n        // Make sure this player hasn't already been set up.\n        if (mediaEl.player === undefined) {\n          var options = mediaEl.getAttribute('data-setup'); // Check if data-setup attr exists.\n          // We only auto-setup if they've added the data-setup attr.\n\n          if (options !== null) {\n            // Create new video.js instance.\n            videojs$1(mediaEl);\n          }\n        } // If getAttribute isn't defined, we need to wait for the DOM.\n\n      } else {\n        autoSetupTimeout(1);\n        break;\n      }\n    } // No videos were found, so keep looping unless page is finished loading.\n\n  } else if (!_windowLoaded) {\n    autoSetupTimeout(1);\n  }\n};\n/**\n * Wait until the page is loaded before running autoSetup. This will be called in\n * autoSetup if `hasLoaded` returns false.\n *\n * @param {number} wait\n *        How long to wait in ms\n *\n * @param {module:videojs} [vjs]\n *        The videojs library function\n */\n\n\nfunction autoSetupTimeout(wait, vjs) {\n  // Protect against breakage in non-browser environments\n  if (!isReal()) {\n    return;\n  }\n\n  if (vjs) {\n    videojs$1 = vjs;\n  }\n\n  window$1.setTimeout(autoSetup, wait);\n}\n/**\n * Used to set the internal tracking of window loaded state to true.\n *\n * @private\n */\n\n\nfunction setWindowLoaded() {\n  _windowLoaded = true;\n  window$1.removeEventListener('load', setWindowLoaded);\n}\n\nif (isReal()) {\n  if (document.readyState === 'complete') {\n    setWindowLoaded();\n  } else {\n    /**\n     * Listen for the load event on window, and set _windowLoaded to true.\n     *\n     * We use a standard event listener here to avoid incrementing the GUID\n     * before any players are created.\n     *\n     * @listens load\n     */\n    window$1.addEventListener('load', setWindowLoaded);\n  }\n}\n\n/**\n * @file stylesheet.js\n * @module stylesheet\n */\n/**\n * Create a DOM syle element given a className for it.\n *\n * @param {string} className\n *        The className to add to the created style element.\n *\n * @return {Element}\n *         The element that was created.\n */\n\nvar createStyleElement = function createStyleElement(className) {\n  var style = document.createElement('style');\n  style.className = className;\n  return style;\n};\n/**\n * Add text to a DOM element.\n *\n * @param {Element} el\n *        The Element to add text content to.\n *\n * @param {string} content\n *        The text to add to the element.\n */\n\nvar setTextContent = function setTextContent(el, content) {\n  if (el.styleSheet) {\n    el.styleSheet.cssText = content;\n  } else {\n    el.textContent = content;\n  }\n};\n\n/**\n * @file guid.js\n * @module guid\n */\n// Default value for GUIDs. This allows us to reset the GUID counter in tests.\n//\n// The initial GUID is 3 because some users have come to rely on the first\n// default player ID ending up as `vjs_video_3`.\n//\n// See: https://github.com/videojs/video.js/pull/6216\nvar _initialGuid = 3;\n/**\n * Unique ID for an element or function\n *\n * @type {Number}\n */\n\nvar _guid = _initialGuid;\n/**\n * Get a unique auto-incrementing ID by number that has not been returned before.\n *\n * @return {number}\n *         A new unique ID.\n */\n\nfunction newGUID() {\n  return _guid++;\n}\n\n/**\n * @file dom-data.js\n * @module dom-data\n */\nvar FakeWeakMap;\n\nif (!window$1.WeakMap) {\n  FakeWeakMap = /*#__PURE__*/function () {\n    function FakeWeakMap() {\n      this.vdata = 'vdata' + Math.floor(window$1.performance && window$1.performance.now() || Date.now());\n      this.data = {};\n    }\n\n    var _proto = FakeWeakMap.prototype;\n\n    _proto.set = function set(key, value) {\n      var access = key[this.vdata] || newGUID();\n\n      if (!key[this.vdata]) {\n        key[this.vdata] = access;\n      }\n\n      this.data[access] = value;\n      return this;\n    };\n\n    _proto.get = function get(key) {\n      var access = key[this.vdata]; // we have data, return it\n\n      if (access) {\n        return this.data[access];\n      } // we don't have data, return nothing.\n      // return undefined explicitly as that's the contract for this method\n\n\n      log$1('We have no data for this element', key);\n      return undefined;\n    };\n\n    _proto.has = function has(key) {\n      var access = key[this.vdata];\n      return access in this.data;\n    };\n\n    _proto[\"delete\"] = function _delete(key) {\n      var access = key[this.vdata];\n\n      if (access) {\n        delete this.data[access];\n        delete key[this.vdata];\n      }\n    };\n\n    return FakeWeakMap;\n  }();\n}\n/**\n * Element Data Store.\n *\n * Allows for binding data to an element without putting it directly on the\n * element. Ex. Event listeners are stored here.\n * (also from jsninja.com, slightly modified and updated for closure compiler)\n *\n * @type {Object}\n * @private\n */\n\n\nvar DomData = window$1.WeakMap ? new WeakMap() : new FakeWeakMap();\n\n/**\n * @file events.js. An Event System (John Resig - Secrets of a JS Ninja http://jsninja.com/)\n * (Original book version wasn't completely usable, so fixed some things and made Closure Compiler compatible)\n * This should work very similarly to jQuery's events, however it's based off the book version which isn't as\n * robust as jquery's, so there's probably some differences.\n *\n * @file events.js\n * @module events\n */\n/**\n * Clean up the listener cache and dispatchers\n *\n * @param {Element|Object} elem\n *        Element to clean up\n *\n * @param {string} type\n *        Type of event to clean up\n */\n\nfunction _cleanUpEvents(elem, type) {\n  if (!DomData.has(elem)) {\n    return;\n  }\n\n  var data = DomData.get(elem); // Remove the events of a particular type if there are none left\n\n  if (data.handlers[type].length === 0) {\n    delete data.handlers[type]; // data.handlers[type] = null;\n    // Setting to null was causing an error with data.handlers\n    // Remove the meta-handler from the element\n\n    if (elem.removeEventListener) {\n      elem.removeEventListener(type, data.dispatcher, false);\n    } else if (elem.detachEvent) {\n      elem.detachEvent('on' + type, data.dispatcher);\n    }\n  } // Remove the events object if there are no types left\n\n\n  if (Object.getOwnPropertyNames(data.handlers).length <= 0) {\n    delete data.handlers;\n    delete data.dispatcher;\n    delete data.disabled;\n  } // Finally remove the element data if there is no data left\n\n\n  if (Object.getOwnPropertyNames(data).length === 0) {\n    DomData[\"delete\"](elem);\n  }\n}\n/**\n * Loops through an array of event types and calls the requested method for each type.\n *\n * @param {Function} fn\n *        The event method we want to use.\n *\n * @param {Element|Object} elem\n *        Element or object to bind listeners to\n *\n * @param {string} type\n *        Type of event to bind to.\n *\n * @param {EventTarget~EventListener} callback\n *        Event listener.\n */\n\n\nfunction _handleMultipleEvents(fn, elem, types, callback) {\n  types.forEach(function (type) {\n    // Call the event method for each one of the types\n    fn(elem, type, callback);\n  });\n}\n/**\n * Fix a native event to have standard property values\n *\n * @param {Object} event\n *        Event object to fix.\n *\n * @return {Object}\n *         Fixed event object.\n */\n\n\nfunction fixEvent(event) {\n  if (event.fixed_) {\n    return event;\n  }\n\n  function returnTrue() {\n    return true;\n  }\n\n  function returnFalse() {\n    return false;\n  } // Test if fixing up is needed\n  // Used to check if !event.stopPropagation instead of isPropagationStopped\n  // But native events return true for stopPropagation, but don't have\n  // other expected methods like isPropagationStopped. Seems to be a problem\n  // with the Javascript Ninja code. So we're just overriding all events now.\n\n\n  if (!event || !event.isPropagationStopped || !event.isImmediatePropagationStopped) {\n    var old = event || window$1.event;\n    event = {}; // Clone the old object so that we can modify the values event = {};\n    // IE8 Doesn't like when you mess with native event properties\n    // Firefox returns false for event.hasOwnProperty('type') and other props\n    //  which makes copying more difficult.\n    // TODO: Probably best to create a whitelist of event props\n\n    for (var key in old) {\n      // Safari 6.0.3 warns you if you try to copy deprecated layerX/Y\n      // Chrome warns you if you try to copy deprecated keyboardEvent.keyLocation\n      // and webkitMovementX/Y\n      if (key !== 'layerX' && key !== 'layerY' && key !== 'keyLocation' && key !== 'webkitMovementX' && key !== 'webkitMovementY') {\n        // Chrome 32+ warns if you try to copy deprecated returnValue, but\n        // we still want to if preventDefault isn't supported (IE8).\n        if (!(key === 'returnValue' && old.preventDefault)) {\n          event[key] = old[key];\n        }\n      }\n    } // The event occurred on this element\n\n\n    if (!event.target) {\n      event.target = event.srcElement || document;\n    } // Handle which other element the event is related to\n\n\n    if (!event.relatedTarget) {\n      event.relatedTarget = event.fromElement === event.target ? event.toElement : event.fromElement;\n    } // Stop the default browser action\n\n\n    event.preventDefault = function () {\n      if (old.preventDefault) {\n        old.preventDefault();\n      }\n\n      event.returnValue = false;\n      old.returnValue = false;\n      event.defaultPrevented = true;\n    };\n\n    event.defaultPrevented = false; // Stop the event from bubbling\n\n    event.stopPropagation = function () {\n      if (old.stopPropagation) {\n        old.stopPropagation();\n      }\n\n      event.cancelBubble = true;\n      old.cancelBubble = true;\n      event.isPropagationStopped = returnTrue;\n    };\n\n    event.isPropagationStopped = returnFalse; // Stop the event from bubbling and executing other handlers\n\n    event.stopImmediatePropagation = function () {\n      if (old.stopImmediatePropagation) {\n        old.stopImmediatePropagation();\n      }\n\n      event.isImmediatePropagationStopped = returnTrue;\n      event.stopPropagation();\n    };\n\n    event.isImmediatePropagationStopped = returnFalse; // Handle mouse position\n\n    if (event.clientX !== null && event.clientX !== undefined) {\n      var doc = document.documentElement;\n      var body = document.body;\n      event.pageX = event.clientX + (doc && doc.scrollLeft || body && body.scrollLeft || 0) - (doc && doc.clientLeft || body && body.clientLeft || 0);\n      event.pageY = event.clientY + (doc && doc.scrollTop || body && body.scrollTop || 0) - (doc && doc.clientTop || body && body.clientTop || 0);\n    } // Handle key presses\n\n\n    event.which = event.charCode || event.keyCode; // Fix button for mouse clicks:\n    // 0 == left; 1 == middle; 2 == right\n\n    if (event.button !== null && event.button !== undefined) {\n      // The following is disabled because it does not pass videojs-standard\n      // and... yikes.\n\n      /* eslint-disable */\n      event.button = event.button & 1 ? 0 : event.button & 4 ? 1 : event.button & 2 ? 2 : 0;\n      /* eslint-enable */\n    }\n  }\n\n  event.fixed_ = true; // Returns fixed-up instance\n\n  return event;\n}\n/**\n * Whether passive event listeners are supported\n */\n\nvar _supportsPassive;\n\nvar supportsPassive = function supportsPassive() {\n  if (typeof _supportsPassive !== 'boolean') {\n    _supportsPassive = false;\n\n    try {\n      var opts = Object.defineProperty({}, 'passive', {\n        get: function get() {\n          _supportsPassive = true;\n        }\n      });\n      window$1.addEventListener('test', null, opts);\n      window$1.removeEventListener('test', null, opts);\n    } catch (e) {// disregard\n    }\n  }\n\n  return _supportsPassive;\n};\n/**\n * Touch events Chrome expects to be passive\n */\n\n\nvar passiveEvents = ['touchstart', 'touchmove'];\n/**\n * Add an event listener to element\n * It stores the handler function in a separate cache object\n * and adds a generic handler to the element's event,\n * along with a unique id (guid) to the element.\n *\n * @param {Element|Object} elem\n *        Element or object to bind listeners to\n *\n * @param {string|string[]} type\n *        Type of event to bind to.\n *\n * @param {EventTarget~EventListener} fn\n *        Event listener.\n */\n\nfunction on(elem, type, fn) {\n  if (Array.isArray(type)) {\n    return _handleMultipleEvents(on, elem, type, fn);\n  }\n\n  if (!DomData.has(elem)) {\n    DomData.set(elem, {});\n  }\n\n  var data = DomData.get(elem); // We need a place to store all our handler data\n\n  if (!data.handlers) {\n    data.handlers = {};\n  }\n\n  if (!data.handlers[type]) {\n    data.handlers[type] = [];\n  }\n\n  if (!fn.guid) {\n    fn.guid = newGUID();\n  }\n\n  data.handlers[type].push(fn);\n\n  if (!data.dispatcher) {\n    data.disabled = false;\n\n    data.dispatcher = function (event, hash) {\n      if (data.disabled) {\n        return;\n      }\n\n      event = fixEvent(event);\n      var handlers = data.handlers[event.type];\n\n      if (handlers) {\n        // Copy handlers so if handlers are added/removed during the process it doesn't throw everything off.\n        var handlersCopy = handlers.slice(0);\n\n        for (var m = 0, n = handlersCopy.length; m < n; m++) {\n          if (event.isImmediatePropagationStopped()) {\n            break;\n          } else {\n            try {\n              handlersCopy[m].call(elem, event, hash);\n            } catch (e) {\n              log$1.error(e);\n            }\n          }\n        }\n      }\n    };\n  }\n\n  if (data.handlers[type].length === 1) {\n    if (elem.addEventListener) {\n      var options = false;\n\n      if (supportsPassive() && passiveEvents.indexOf(type) > -1) {\n        options = {\n          passive: true\n        };\n      }\n\n      elem.addEventListener(type, data.dispatcher, options);\n    } else if (elem.attachEvent) {\n      elem.attachEvent('on' + type, data.dispatcher);\n    }\n  }\n}\n/**\n * Removes event listeners from an element\n *\n * @param {Element|Object} elem\n *        Object to remove listeners from.\n *\n * @param {string|string[]} [type]\n *        Type of listener to remove. Don't include to remove all events from element.\n *\n * @param {EventTarget~EventListener} [fn]\n *        Specific listener to remove. Don't include to remove listeners for an event\n *        type.\n */\n\nfunction off(elem, type, fn) {\n  // Don't want to add a cache object through getElData if not needed\n  if (!DomData.has(elem)) {\n    return;\n  }\n\n  var data = DomData.get(elem); // If no events exist, nothing to unbind\n\n  if (!data.handlers) {\n    return;\n  }\n\n  if (Array.isArray(type)) {\n    return _handleMultipleEvents(off, elem, type, fn);\n  } // Utility function\n\n\n  var removeType = function removeType(el, t) {\n    data.handlers[t] = [];\n\n    _cleanUpEvents(el, t);\n  }; // Are we removing all bound events?\n\n\n  if (type === undefined) {\n    for (var t in data.handlers) {\n      if (Object.prototype.hasOwnProperty.call(data.handlers || {}, t)) {\n        removeType(elem, t);\n      }\n    }\n\n    return;\n  }\n\n  var handlers = data.handlers[type]; // If no handlers exist, nothing to unbind\n\n  if (!handlers) {\n    return;\n  } // If no listener was provided, remove all listeners for type\n\n\n  if (!fn) {\n    removeType(elem, type);\n    return;\n  } // We're only removing a single handler\n\n\n  if (fn.guid) {\n    for (var n = 0; n < handlers.length; n++) {\n      if (handlers[n].guid === fn.guid) {\n        handlers.splice(n--, 1);\n      }\n    }\n  }\n\n  _cleanUpEvents(elem, type);\n}\n/**\n * Trigger an event for an element\n *\n * @param {Element|Object} elem\n *        Element to trigger an event on\n *\n * @param {EventTarget~Event|string} event\n *        A string (the type) or an event object with a type attribute\n *\n * @param {Object} [hash]\n *        data hash to pass along with the event\n *\n * @return {boolean|undefined}\n *         Returns the opposite of `defaultPrevented` if default was\n *         prevented. Otherwise, returns `undefined`\n */\n\nfunction trigger(elem, event, hash) {\n  // Fetches element data and a reference to the parent (for bubbling).\n  // Don't want to add a data object to cache for every parent,\n  // so checking hasElData first.\n  var elemData = DomData.has(elem) ? DomData.get(elem) : {};\n  var parent = elem.parentNode || elem.ownerDocument; // type = event.type || event,\n  // handler;\n  // If an event name was passed as a string, creates an event out of it\n\n  if (typeof event === 'string') {\n    event = {\n      type: event,\n      target: elem\n    };\n  } else if (!event.target) {\n    event.target = elem;\n  } // Normalizes the event properties.\n\n\n  event = fixEvent(event); // If the passed element has a dispatcher, executes the established handlers.\n\n  if (elemData.dispatcher) {\n    elemData.dispatcher.call(elem, event, hash);\n  } // Unless explicitly stopped or the event does not bubble (e.g. media events)\n  // recursively calls this function to bubble the event up the DOM.\n\n\n  if (parent && !event.isPropagationStopped() && event.bubbles === true) {\n    trigger.call(null, parent, event, hash); // If at the top of the DOM, triggers the default action unless disabled.\n  } else if (!parent && !event.defaultPrevented && event.target && event.target[event.type]) {\n    if (!DomData.has(event.target)) {\n      DomData.set(event.target, {});\n    }\n\n    var targetData = DomData.get(event.target); // Checks if the target has a default action for this event.\n\n    if (event.target[event.type]) {\n      // Temporarily disables event dispatching on the target as we have already executed the handler.\n      targetData.disabled = true; // Executes the default action.\n\n      if (typeof event.target[event.type] === 'function') {\n        event.target[event.type]();\n      } // Re-enables event dispatching.\n\n\n      targetData.disabled = false;\n    }\n  } // Inform the triggerer if the default was prevented by returning false\n\n\n  return !event.defaultPrevented;\n}\n/**\n * Trigger a listener only once for an event.\n *\n * @param {Element|Object} elem\n *        Element or object to bind to.\n *\n * @param {string|string[]} type\n *        Name/type of event\n *\n * @param {Event~EventListener} fn\n *        Event listener function\n */\n\nfunction one(elem, type, fn) {\n  if (Array.isArray(type)) {\n    return _handleMultipleEvents(one, elem, type, fn);\n  }\n\n  var func = function func() {\n    off(elem, type, func);\n    fn.apply(this, arguments);\n  }; // copy the guid to the new function so it can removed using the original function's ID\n\n\n  func.guid = fn.guid = fn.guid || newGUID();\n  on(elem, type, func);\n}\n/**\n * Trigger a listener only once and then turn if off for all\n * configured events\n *\n * @param {Element|Object} elem\n *        Element or object to bind to.\n *\n * @param {string|string[]} type\n *        Name/type of event\n *\n * @param {Event~EventListener} fn\n *        Event listener function\n */\n\nfunction any(elem, type, fn) {\n  var func = function func() {\n    off(elem, type, func);\n    fn.apply(this, arguments);\n  }; // copy the guid to the new function so it can removed using the original function's ID\n\n\n  func.guid = fn.guid = fn.guid || newGUID(); // multiple ons, but one off for everything\n\n  on(elem, type, func);\n}\n\nvar Events = /*#__PURE__*/Object.freeze({\n  __proto__: null,\n  fixEvent: fixEvent,\n  on: on,\n  off: off,\n  trigger: trigger,\n  one: one,\n  any: any\n});\n\n/**\n * @file fn.js\n * @module fn\n */\nvar UPDATE_REFRESH_INTERVAL = 30;\n/**\n * Bind (a.k.a proxy or context). A simple method for changing the context of\n * a function.\n *\n * It also stores a unique id on the function so it can be easily removed from\n * events.\n *\n * @function\n * @param    {Mixed} context\n *           The object to bind as scope.\n *\n * @param    {Function} fn\n *           The function to be bound to a scope.\n *\n * @param    {number} [uid]\n *           An optional unique ID for the function to be set\n *\n * @return   {Function}\n *           The new function that will be bound into the context given\n */\n\nvar bind = function bind(context, fn, uid) {\n  // Make sure the function has a unique ID\n  if (!fn.guid) {\n    fn.guid = newGUID();\n  } // Create the new function that changes the context\n\n\n  var bound = fn.bind(context); // Allow for the ability to individualize this function\n  // Needed in the case where multiple objects might share the same prototype\n  // IF both items add an event listener with the same function, then you try to remove just one\n  // it will remove both because they both have the same guid.\n  // when using this, you need to use the bind method when you remove the listener as well.\n  // currently used in text tracks\n\n  bound.guid = uid ? uid + '_' + fn.guid : fn.guid;\n  return bound;\n};\n/**\n * Wraps the given function, `fn`, with a new function that only invokes `fn`\n * at most once per every `wait` milliseconds.\n *\n * @function\n * @param    {Function} fn\n *           The function to be throttled.\n *\n * @param    {number}   wait\n *           The number of milliseconds by which to throttle.\n *\n * @return   {Function}\n */\n\nvar throttle = function throttle(fn, wait) {\n  var last = window$1.performance.now();\n\n  var throttled = function throttled() {\n    var now = window$1.performance.now();\n\n    if (now - last >= wait) {\n      fn.apply(void 0, arguments);\n      last = now;\n    }\n  };\n\n  return throttled;\n};\n/**\n * Creates a debounced function that delays invoking `func` until after `wait`\n * milliseconds have elapsed since the last time the debounced function was\n * invoked.\n *\n * Inspired by lodash and underscore implementations.\n *\n * @function\n * @param    {Function} func\n *           The function to wrap with debounce behavior.\n *\n * @param    {number} wait\n *           The number of milliseconds to wait after the last invocation.\n *\n * @param    {boolean} [immediate]\n *           Whether or not to invoke the function immediately upon creation.\n *\n * @param    {Object} [context=window]\n *           The \"context\" in which the debounced function should debounce. For\n *           example, if this function should be tied to a Video.js player,\n *           the player can be passed here. Alternatively, defaults to the\n *           global `window` object.\n *\n * @return   {Function}\n *           A debounced function.\n */\n\nvar debounce = function debounce(func, wait, immediate, context) {\n  if (context === void 0) {\n    context = window$1;\n  }\n\n  var timeout;\n\n  var cancel = function cancel() {\n    context.clearTimeout(timeout);\n    timeout = null;\n  };\n  /* eslint-disable consistent-this */\n\n\n  var debounced = function debounced() {\n    var self = this;\n    var args = arguments;\n\n    var _later = function later() {\n      timeout = null;\n      _later = null;\n\n      if (!immediate) {\n        func.apply(self, args);\n      }\n    };\n\n    if (!timeout && immediate) {\n      func.apply(self, args);\n    }\n\n    context.clearTimeout(timeout);\n    timeout = context.setTimeout(_later, wait);\n  };\n  /* eslint-enable consistent-this */\n\n\n  debounced.cancel = cancel;\n  return debounced;\n};\n\n/**\n * @file src/js/event-target.js\n */\n/**\n * `EventTarget` is a class that can have the same API as the DOM `EventTarget`. It\n * adds shorthand functions that wrap around lengthy functions. For example:\n * the `on` function is a wrapper around `addEventListener`.\n *\n * @see [EventTarget Spec]{@link https://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-EventTarget}\n * @class EventTarget\n */\n\nvar EventTarget$2 = function EventTarget() {};\n/**\n * A Custom DOM event.\n *\n * @typedef {Object} EventTarget~Event\n * @see [Properties]{@link https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent}\n */\n\n/**\n * All event listeners should follow the following format.\n *\n * @callback EventTarget~EventListener\n * @this {EventTarget}\n *\n * @param {EventTarget~Event} event\n *        the event that triggered this function\n *\n * @param {Object} [hash]\n *        hash of data sent during the event\n */\n\n/**\n * An object containing event names as keys and booleans as values.\n *\n * > NOTE: If an event name is set to a true value here {@link EventTarget#trigger}\n *         will have extra functionality. See that function for more information.\n *\n * @property EventTarget.prototype.allowedEvents_\n * @private\n */\n\n\nEventTarget$2.prototype.allowedEvents_ = {};\n/**\n * Adds an `event listener` to an instance of an `EventTarget`. An `event listener` is a\n * function that will get called when an event with a certain name gets triggered.\n *\n * @param {string|string[]} type\n *        An event name or an array of event names.\n *\n * @param {EventTarget~EventListener} fn\n *        The function to call with `EventTarget`s\n */\n\nEventTarget$2.prototype.on = function (type, fn) {\n  // Remove the addEventListener alias before calling Events.on\n  // so we don't get into an infinite type loop\n  var ael = this.addEventListener;\n\n  this.addEventListener = function () {};\n\n  on(this, type, fn);\n  this.addEventListener = ael;\n};\n/**\n * An alias of {@link EventTarget#on}. Allows `EventTarget` to mimic\n * the standard DOM API.\n *\n * @function\n * @see {@link EventTarget#on}\n */\n\n\nEventTarget$2.prototype.addEventListener = EventTarget$2.prototype.on;\n/**\n * Removes an `event listener` for a specific event from an instance of `EventTarget`.\n * This makes it so that the `event listener` will no longer get called when the\n * named event happens.\n *\n * @param {string|string[]} type\n *        An event name or an array of event names.\n *\n * @param {EventTarget~EventListener} fn\n *        The function to remove.\n */\n\nEventTarget$2.prototype.off = function (type, fn) {\n  off(this, type, fn);\n};\n/**\n * An alias of {@link EventTarget#off}. Allows `EventTarget` to mimic\n * the standard DOM API.\n *\n * @function\n * @see {@link EventTarget#off}\n */\n\n\nEventTarget$2.prototype.removeEventListener = EventTarget$2.prototype.off;\n/**\n * This function will add an `event listener` that gets triggered only once. After the\n * first trigger it will get removed. This is like adding an `event listener`\n * with {@link EventTarget#on} that calls {@link EventTarget#off} on itself.\n *\n * @param {string|string[]} type\n *        An event name or an array of event names.\n *\n * @param {EventTarget~EventListener} fn\n *        The function to be called once for each event name.\n */\n\nEventTarget$2.prototype.one = function (type, fn) {\n  // Remove the addEventListener aliasing Events.on\n  // so we don't get into an infinite type loop\n  var ael = this.addEventListener;\n\n  this.addEventListener = function () {};\n\n  one(this, type, fn);\n  this.addEventListener = ael;\n};\n\nEventTarget$2.prototype.any = function (type, fn) {\n  // Remove the addEventListener aliasing Events.on\n  // so we don't get into an infinite type loop\n  var ael = this.addEventListener;\n\n  this.addEventListener = function () {};\n\n  any(this, type, fn);\n  this.addEventListener = ael;\n};\n/**\n * This function causes an event to happen. This will then cause any `event listeners`\n * that are waiting for that event, to get called. If there are no `event listeners`\n * for an event then nothing will happen.\n *\n * If the name of the `Event` that is being triggered is in `EventTarget.allowedEvents_`.\n * Trigger will also call the `on` + `uppercaseEventName` function.\n *\n * Example:\n * 'click' is in `EventTarget.allowedEvents_`, so, trigger will attempt to call\n * `onClick` if it exists.\n *\n * @param {string|EventTarget~Event|Object} event\n *        The name of the event, an `Event`, or an object with a key of type set to\n *        an event name.\n */\n\n\nEventTarget$2.prototype.trigger = function (event) {\n  var type = event.type || event; // deprecation\n  // In a future version we should default target to `this`\n  // similar to how we default the target to `elem` in\n  // `Events.trigger`. Right now the default `target` will be\n  // `document` due to the `Event.fixEvent` call.\n\n  if (typeof event === 'string') {\n    event = {\n      type: type\n    };\n  }\n\n  event = fixEvent(event);\n\n  if (this.allowedEvents_[type] && this['on' + type]) {\n    this['on' + type](event);\n  }\n\n  trigger(this, event);\n};\n/**\n * An alias of {@link EventTarget#trigger}. Allows `EventTarget` to mimic\n * the standard DOM API.\n *\n * @function\n * @see {@link EventTarget#trigger}\n */\n\n\nEventTarget$2.prototype.dispatchEvent = EventTarget$2.prototype.trigger;\nvar EVENT_MAP;\n\nEventTarget$2.prototype.queueTrigger = function (event) {\n  var _this = this;\n\n  // only set up EVENT_MAP if it'll be used\n  if (!EVENT_MAP) {\n    EVENT_MAP = new Map();\n  }\n\n  var type = event.type || event;\n  var map = EVENT_MAP.get(this);\n\n  if (!map) {\n    map = new Map();\n    EVENT_MAP.set(this, map);\n  }\n\n  var oldTimeout = map.get(type);\n  map[\"delete\"](type);\n  window$1.clearTimeout(oldTimeout);\n  var timeout = window$1.setTimeout(function () {\n    // if we cleared out all timeouts for the current target, delete its map\n    if (map.size === 0) {\n      map = null;\n      EVENT_MAP[\"delete\"](_this);\n    }\n\n    _this.trigger(event);\n  }, 0);\n  map.set(type, timeout);\n};\n\n/**\n * @file mixins/evented.js\n * @module evented\n */\n\nvar objName = function objName(obj) {\n  if (typeof obj.name === 'function') {\n    return obj.name();\n  }\n\n  if (typeof obj.name === 'string') {\n    return obj.name;\n  }\n\n  if (obj.name_) {\n    return obj.name_;\n  }\n\n  if (obj.constructor && obj.constructor.name) {\n    return obj.constructor.name;\n  }\n\n  return typeof obj;\n};\n/**\n * Returns whether or not an object has had the evented mixin applied.\n *\n * @param  {Object} object\n *         An object to test.\n *\n * @return {boolean}\n *         Whether or not the object appears to be evented.\n */\n\n\nvar isEvented = function isEvented(object) {\n  return object instanceof EventTarget$2 || !!object.eventBusEl_ && ['on', 'one', 'off', 'trigger'].every(function (k) {\n    return typeof object[k] === 'function';\n  });\n};\n/**\n * Adds a callback to run after the evented mixin applied.\n *\n * @param  {Object} object\n *         An object to Add\n * @param  {Function} callback\n *         The callback to run.\n */\n\n\nvar addEventedCallback = function addEventedCallback(target, callback) {\n  if (isEvented(target)) {\n    callback();\n  } else {\n    if (!target.eventedCallbacks) {\n      target.eventedCallbacks = [];\n    }\n\n    target.eventedCallbacks.push(callback);\n  }\n};\n/**\n * Whether a value is a valid event type - non-empty string or array.\n *\n * @private\n * @param  {string|Array} type\n *         The type value to test.\n *\n * @return {boolean}\n *         Whether or not the type is a valid event type.\n */\n\n\nvar isValidEventType = function isValidEventType(type) {\n  return (// The regex here verifies that the `type` contains at least one non-\n    // whitespace character.\n    typeof type === 'string' && /\\S/.test(type) || Array.isArray(type) && !!type.length\n  );\n};\n/**\n * Validates a value to determine if it is a valid event target. Throws if not.\n *\n * @private\n * @throws {Error}\n *         If the target does not appear to be a valid event target.\n *\n * @param  {Object} target\n *         The object to test.\n *\n * @param  {Object} obj\n *         The evented object we are validating for\n *\n * @param  {string} fnName\n *         The name of the evented mixin function that called this.\n */\n\n\nvar validateTarget = function validateTarget(target, obj, fnName) {\n  if (!target || !target.nodeName && !isEvented(target)) {\n    throw new Error(\"Invalid target for \" + objName(obj) + \"#\" + fnName + \"; must be a DOM node or evented object.\");\n  }\n};\n/**\n * Validates a value to determine if it is a valid event target. Throws if not.\n *\n * @private\n * @throws {Error}\n *         If the type does not appear to be a valid event type.\n *\n * @param  {string|Array} type\n *         The type to test.\n *\n * @param  {Object} obj\n*         The evented object we are validating for\n *\n * @param  {string} fnName\n *         The name of the evented mixin function that called this.\n */\n\n\nvar validateEventType = function validateEventType(type, obj, fnName) {\n  if (!isValidEventType(type)) {\n    throw new Error(\"Invalid event type for \" + objName(obj) + \"#\" + fnName + \"; must be a non-empty string or array.\");\n  }\n};\n/**\n * Validates a value to determine if it is a valid listener. Throws if not.\n *\n * @private\n * @throws {Error}\n *         If the listener is not a function.\n *\n * @param  {Function} listener\n *         The listener to test.\n *\n * @param  {Object} obj\n *         The evented object we are validating for\n *\n * @param  {string} fnName\n *         The name of the evented mixin function that called this.\n */\n\n\nvar validateListener = function validateListener(listener, obj, fnName) {\n  if (typeof listener !== 'function') {\n    throw new Error(\"Invalid listener for \" + objName(obj) + \"#\" + fnName + \"; must be a function.\");\n  }\n};\n/**\n * Takes an array of arguments given to `on()` or `one()`, validates them, and\n * normalizes them into an object.\n *\n * @private\n * @param  {Object} self\n *         The evented object on which `on()` or `one()` was called. This\n *         object will be bound as the `this` value for the listener.\n *\n * @param  {Array} args\n *         An array of arguments passed to `on()` or `one()`.\n *\n * @param  {string} fnName\n *         The name of the evented mixin function that called this.\n *\n * @return {Object}\n *         An object containing useful values for `on()` or `one()` calls.\n */\n\n\nvar normalizeListenArgs = function normalizeListenArgs(self, args, fnName) {\n  // If the number of arguments is less than 3, the target is always the\n  // evented object itself.\n  var isTargetingSelf = args.length < 3 || args[0] === self || args[0] === self.eventBusEl_;\n  var target;\n  var type;\n  var listener;\n\n  if (isTargetingSelf) {\n    target = self.eventBusEl_; // Deal with cases where we got 3 arguments, but we are still listening to\n    // the evented object itself.\n\n    if (args.length >= 3) {\n      args.shift();\n    }\n\n    type = args[0];\n    listener = args[1];\n  } else {\n    target = args[0];\n    type = args[1];\n    listener = args[2];\n  }\n\n  validateTarget(target, self, fnName);\n  validateEventType(type, self, fnName);\n  validateListener(listener, self, fnName);\n  listener = bind(self, listener);\n  return {\n    isTargetingSelf: isTargetingSelf,\n    target: target,\n    type: type,\n    listener: listener\n  };\n};\n/**\n * Adds the listener to the event type(s) on the target, normalizing for\n * the type of target.\n *\n * @private\n * @param  {Element|Object} target\n *         A DOM node or evented object.\n *\n * @param  {string} method\n *         The event binding method to use (\"on\" or \"one\").\n *\n * @param  {string|Array} type\n *         One or more event type(s).\n *\n * @param  {Function} listener\n *         A listener function.\n */\n\n\nvar listen = function listen(target, method, type, listener) {\n  validateTarget(target, target, method);\n\n  if (target.nodeName) {\n    Events[method](target, type, listener);\n  } else {\n    target[method](type, listener);\n  }\n};\n/**\n * Contains methods that provide event capabilities to an object which is passed\n * to {@link module:evented|evented}.\n *\n * @mixin EventedMixin\n */\n\n\nvar EventedMixin = {\n  /**\n   * Add a listener to an event (or events) on this object or another evented\n   * object.\n   *\n   * @param  {string|Array|Element|Object} targetOrType\n   *         If this is a string or array, it represents the event type(s)\n   *         that will trigger the listener.\n   *\n   *         Another evented object can be passed here instead, which will\n   *         cause the listener to listen for events on _that_ object.\n   *\n   *         In either case, the listener's `this` value will be bound to\n   *         this object.\n   *\n   * @param  {string|Array|Function} typeOrListener\n   *         If the first argument was a string or array, this should be the\n   *         listener function. Otherwise, this is a string or array of event\n   *         type(s).\n   *\n   * @param  {Function} [listener]\n   *         If the first argument was another evented object, this will be\n   *         the listener function.\n   */\n  on: function on() {\n    var _this = this;\n\n    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n      args[_key] = arguments[_key];\n    }\n\n    var _normalizeListenArgs = normalizeListenArgs(this, args, 'on'),\n        isTargetingSelf = _normalizeListenArgs.isTargetingSelf,\n        target = _normalizeListenArgs.target,\n        type = _normalizeListenArgs.type,\n        listener = _normalizeListenArgs.listener;\n\n    listen(target, 'on', type, listener); // If this object is listening to another evented object.\n\n    if (!isTargetingSelf) {\n      // If this object is disposed, remove the listener.\n      var removeListenerOnDispose = function removeListenerOnDispose() {\n        return _this.off(target, type, listener);\n      }; // Use the same function ID as the listener so we can remove it later it\n      // using the ID of the original listener.\n\n\n      removeListenerOnDispose.guid = listener.guid; // Add a listener to the target's dispose event as well. This ensures\n      // that if the target is disposed BEFORE this object, we remove the\n      // removal listener that was just added. Otherwise, we create a memory leak.\n\n      var removeRemoverOnTargetDispose = function removeRemoverOnTargetDispose() {\n        return _this.off('dispose', removeListenerOnDispose);\n      }; // Use the same function ID as the listener so we can remove it later\n      // it using the ID of the original listener.\n\n\n      removeRemoverOnTargetDispose.guid = listener.guid;\n      listen(this, 'on', 'dispose', removeListenerOnDispose);\n      listen(target, 'on', 'dispose', removeRemoverOnTargetDispose);\n    }\n  },\n\n  /**\n   * Add a listener to an event (or events) on this object or another evented\n   * object. The listener will be called once per event and then removed.\n   *\n   * @param  {string|Array|Element|Object} targetOrType\n   *         If this is a string or array, it represents the event type(s)\n   *         that will trigger the listener.\n   *\n   *         Another evented object can be passed here instead, which will\n   *         cause the listener to listen for events on _that_ object.\n   *\n   *         In either case, the listener's `this` value will be bound to\n   *         this object.\n   *\n   * @param  {string|Array|Function} typeOrListener\n   *         If the first argument was a string or array, this should be the\n   *         listener function. Otherwise, this is a string or array of event\n   *         type(s).\n   *\n   * @param  {Function} [listener]\n   *         If the first argument was another evented object, this will be\n   *         the listener function.\n   */\n  one: function one() {\n    var _this2 = this;\n\n    for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {\n      args[_key2] = arguments[_key2];\n    }\n\n    var _normalizeListenArgs2 = normalizeListenArgs(this, args, 'one'),\n        isTargetingSelf = _normalizeListenArgs2.isTargetingSelf,\n        target = _normalizeListenArgs2.target,\n        type = _normalizeListenArgs2.type,\n        listener = _normalizeListenArgs2.listener; // Targeting this evented object.\n\n\n    if (isTargetingSelf) {\n      listen(target, 'one', type, listener); // Targeting another evented object.\n    } else {\n      // TODO: This wrapper is incorrect! It should only\n      //       remove the wrapper for the event type that called it.\n      //       Instead all listners are removed on the first trigger!\n      //       see https://github.com/videojs/video.js/issues/5962\n      var wrapper = function wrapper() {\n        _this2.off(target, type, wrapper);\n\n        for (var _len3 = arguments.length, largs = new Array(_len3), _key3 = 0; _key3 < _len3; _key3++) {\n          largs[_key3] = arguments[_key3];\n        }\n\n        listener.apply(null, largs);\n      }; // Use the same function ID as the listener so we can remove it later\n      // it using the ID of the original listener.\n\n\n      wrapper.guid = listener.guid;\n      listen(target, 'one', type, wrapper);\n    }\n  },\n\n  /**\n   * Add a listener to an event (or events) on this object or another evented\n   * object. The listener will only be called once for the first event that is triggered\n   * then removed.\n   *\n   * @param  {string|Array|Element|Object} targetOrType\n   *         If this is a string or array, it represents the event type(s)\n   *         that will trigger the listener.\n   *\n   *         Another evented object can be passed here instead, which will\n   *         cause the listener to listen for events on _that_ object.\n   *\n   *         In either case, the listener's `this` value will be bound to\n   *         this object.\n   *\n   * @param  {string|Array|Function} typeOrListener\n   *         If the first argument was a string or array, this should be the\n   *         listener function. Otherwise, this is a string or array of event\n   *         type(s).\n   *\n   * @param  {Function} [listener]\n   *         If the first argument was another evented object, this will be\n   *         the listener function.\n   */\n  any: function any() {\n    var _this3 = this;\n\n    for (var _len4 = arguments.length, args = new Array(_len4), _key4 = 0; _key4 < _len4; _key4++) {\n      args[_key4] = arguments[_key4];\n    }\n\n    var _normalizeListenArgs3 = normalizeListenArgs(this, args, 'any'),\n        isTargetingSelf = _normalizeListenArgs3.isTargetingSelf,\n        target = _normalizeListenArgs3.target,\n        type = _normalizeListenArgs3.type,\n        listener = _normalizeListenArgs3.listener; // Targeting this evented object.\n\n\n    if (isTargetingSelf) {\n      listen(target, 'any', type, listener); // Targeting another evented object.\n    } else {\n      var wrapper = function wrapper() {\n        _this3.off(target, type, wrapper);\n\n        for (var _len5 = arguments.length, largs = new Array(_len5), _key5 = 0; _key5 < _len5; _key5++) {\n          largs[_key5] = arguments[_key5];\n        }\n\n        listener.apply(null, largs);\n      }; // Use the same function ID as the listener so we can remove it later\n      // it using the ID of the original listener.\n\n\n      wrapper.guid = listener.guid;\n      listen(target, 'any', type, wrapper);\n    }\n  },\n\n  /**\n   * Removes listener(s) from event(s) on an evented object.\n   *\n   * @param  {string|Array|Element|Object} [targetOrType]\n   *         If this is a string or array, it represents the event type(s).\n   *\n   *         Another evented object can be passed here instead, in which case\n   *         ALL 3 arguments are _required_.\n   *\n   * @param  {string|Array|Function} [typeOrListener]\n   *         If the first argument was a string or array, this may be the\n   *         listener function. Otherwise, this is a string or array of event\n   *         type(s).\n   *\n   * @param  {Function} [listener]\n   *         If the first argument was another evented object, this will be\n   *         the listener function; otherwise, _all_ listeners bound to the\n   *         event type(s) will be removed.\n   */\n  off: function off$1(targetOrType, typeOrListener, listener) {\n    // Targeting this evented object.\n    if (!targetOrType || isValidEventType(targetOrType)) {\n      off(this.eventBusEl_, targetOrType, typeOrListener); // Targeting another evented object.\n    } else {\n      var target = targetOrType;\n      var type = typeOrListener; // Fail fast and in a meaningful way!\n\n      validateTarget(target, this, 'off');\n      validateEventType(type, this, 'off');\n      validateListener(listener, this, 'off'); // Ensure there's at least a guid, even if the function hasn't been used\n\n      listener = bind(this, listener); // Remove the dispose listener on this evented object, which was given\n      // the same guid as the event listener in on().\n\n      this.off('dispose', listener);\n\n      if (target.nodeName) {\n        off(target, type, listener);\n        off(target, 'dispose', listener);\n      } else if (isEvented(target)) {\n        target.off(type, listener);\n        target.off('dispose', listener);\n      }\n    }\n  },\n\n  /**\n   * Fire an event on this evented object, causing its listeners to be called.\n   *\n   * @param   {string|Object} event\n   *          An event type or an object with a type property.\n   *\n   * @param   {Object} [hash]\n   *          An additional object to pass along to listeners.\n   *\n   * @return {boolean}\n   *          Whether or not the default behavior was prevented.\n   */\n  trigger: function trigger$1(event, hash) {\n    validateTarget(this.eventBusEl_, this, 'trigger');\n    var type = event && typeof event !== 'string' ? event.type : event;\n\n    if (!isValidEventType(type)) {\n      var error = \"Invalid event type for \" + objName(this) + \"#trigger; \" + 'must be a non-empty string or object with a type key that has a non-empty value.';\n\n      if (event) {\n        (this.log || log$1).error(error);\n      } else {\n        throw new Error(error);\n      }\n    }\n\n    return trigger(this.eventBusEl_, event, hash);\n  }\n};\n/**\n * Applies {@link module:evented~EventedMixin|EventedMixin} to a target object.\n *\n * @param  {Object} target\n *         The object to which to add event methods.\n *\n * @param  {Object} [options={}]\n *         Options for customizing the mixin behavior.\n *\n * @param  {string} [options.eventBusKey]\n *         By default, adds a `eventBusEl_` DOM element to the target object,\n *         which is used as an event bus. If the target object already has a\n *         DOM element that should be used, pass its key here.\n *\n * @return {Object}\n *         The target object.\n */\n\nfunction evented(target, options) {\n  if (options === void 0) {\n    options = {};\n  }\n\n  var _options = options,\n      eventBusKey = _options.eventBusKey; // Set or create the eventBusEl_.\n\n  if (eventBusKey) {\n    if (!target[eventBusKey].nodeName) {\n      throw new Error(\"The eventBusKey \\\"\" + eventBusKey + \"\\\" does not refer to an element.\");\n    }\n\n    target.eventBusEl_ = target[eventBusKey];\n  } else {\n    target.eventBusEl_ = createEl('span', {\n      className: 'vjs-event-bus'\n    });\n  }\n\n  assign(target, EventedMixin);\n\n  if (target.eventedCallbacks) {\n    target.eventedCallbacks.forEach(function (callback) {\n      callback();\n    });\n  } // When any evented object is disposed, it removes all its listeners.\n\n\n  target.on('dispose', function () {\n    target.off();\n    [target, target.el_, target.eventBusEl_].forEach(function (val) {\n      if (val && DomData.has(val)) {\n        DomData[\"delete\"](val);\n      }\n    });\n    window$1.setTimeout(function () {\n      target.eventBusEl_ = null;\n    }, 0);\n  });\n  return target;\n}\n\n/**\n * @file mixins/stateful.js\n * @module stateful\n */\n/**\n * Contains methods that provide statefulness to an object which is passed\n * to {@link module:stateful}.\n *\n * @mixin StatefulMixin\n */\n\nvar StatefulMixin = {\n  /**\n   * A hash containing arbitrary keys and values representing the state of\n   * the object.\n   *\n   * @type {Object}\n   */\n  state: {},\n\n  /**\n   * Set the state of an object by mutating its\n   * {@link module:stateful~StatefulMixin.state|state} object in place.\n   *\n   * @fires   module:stateful~StatefulMixin#statechanged\n   * @param   {Object|Function} stateUpdates\n   *          A new set of properties to shallow-merge into the plugin state.\n   *          Can be a plain object or a function returning a plain object.\n   *\n   * @return {Object|undefined}\n   *          An object containing changes that occurred. If no changes\n   *          occurred, returns `undefined`.\n   */\n  setState: function setState(stateUpdates) {\n    var _this = this;\n\n    // Support providing the `stateUpdates` state as a function.\n    if (typeof stateUpdates === 'function') {\n      stateUpdates = stateUpdates();\n    }\n\n    var changes;\n    each(stateUpdates, function (value, key) {\n      // Record the change if the value is different from what's in the\n      // current state.\n      if (_this.state[key] !== value) {\n        changes = changes || {};\n        changes[key] = {\n          from: _this.state[key],\n          to: value\n        };\n      }\n\n      _this.state[key] = value;\n    }); // Only trigger \"statechange\" if there were changes AND we have a trigger\n    // function. This allows us to not require that the target object be an\n    // evented object.\n\n    if (changes && isEvented(this)) {\n      /**\n       * An event triggered on an object that is both\n       * {@link module:stateful|stateful} and {@link module:evented|evented}\n       * indicating that its state has changed.\n       *\n       * @event    module:stateful~StatefulMixin#statechanged\n       * @type     {Object}\n       * @property {Object} changes\n       *           A hash containing the properties that were changed and\n       *           the values they were changed `from` and `to`.\n       */\n      this.trigger({\n        changes: changes,\n        type: 'statechanged'\n      });\n    }\n\n    return changes;\n  }\n};\n/**\n * Applies {@link module:stateful~StatefulMixin|StatefulMixin} to a target\n * object.\n *\n * If the target object is {@link module:evented|evented} and has a\n * `handleStateChanged` method, that method will be automatically bound to the\n * `statechanged` event on itself.\n *\n * @param   {Object} target\n *          The object to be made stateful.\n *\n * @param   {Object} [defaultState]\n *          A default set of properties to populate the newly-stateful object's\n *          `state` property.\n *\n * @return {Object}\n *          Returns the `target`.\n */\n\nfunction stateful(target, defaultState) {\n  assign(target, StatefulMixin); // This happens after the mixing-in because we need to replace the `state`\n  // added in that step.\n\n  target.state = assign({}, target.state, defaultState); // Auto-bind the `handleStateChanged` method of the target object if it exists.\n\n  if (typeof target.handleStateChanged === 'function' && isEvented(target)) {\n    target.on('statechanged', target.handleStateChanged);\n  }\n\n  return target;\n}\n\n/**\n * @file string-cases.js\n * @module to-lower-case\n */\n\n/**\n * Lowercase the first letter of a string.\n *\n * @param {string} string\n *        String to be lowercased\n *\n * @return {string}\n *         The string with a lowercased first letter\n */\nvar toLowerCase = function toLowerCase(string) {\n  if (typeof string !== 'string') {\n    return string;\n  }\n\n  return string.replace(/./, function (w) {\n    return w.toLowerCase();\n  });\n};\n/**\n * Uppercase the first letter of a string.\n *\n * @param {string} string\n *        String to be uppercased\n *\n * @return {string}\n *         The string with an uppercased first letter\n */\n\nvar toTitleCase$1 = function toTitleCase(string) {\n  if (typeof string !== 'string') {\n    return string;\n  }\n\n  return string.replace(/./, function (w) {\n    return w.toUpperCase();\n  });\n};\n/**\n * Compares the TitleCase versions of the two strings for equality.\n *\n * @param {string} str1\n *        The first string to compare\n *\n * @param {string} str2\n *        The second string to compare\n *\n * @return {boolean}\n *         Whether the TitleCase versions of the strings are equal\n */\n\nvar titleCaseEquals = function titleCaseEquals(str1, str2) {\n  return toTitleCase$1(str1) === toTitleCase$1(str2);\n};\n\n/**\n * @file merge-options.js\n * @module merge-options\n */\n/**\n * Merge two objects recursively.\n *\n * Performs a deep merge like\n * {@link https://lodash.com/docs/4.17.10#merge|lodash.merge}, but only merges\n * plain objects (not arrays, elements, or anything else).\n *\n * Non-plain object values will be copied directly from the right-most\n * argument.\n *\n * @static\n * @param   {Object[]} sources\n *          One or more objects to merge into a new object.\n *\n * @return {Object}\n *          A new object that is the merged result of all sources.\n */\n\nfunction mergeOptions$3() {\n  var result = {};\n\n  for (var _len = arguments.length, sources = new Array(_len), _key = 0; _key < _len; _key++) {\n    sources[_key] = arguments[_key];\n  }\n\n  sources.forEach(function (source) {\n    if (!source) {\n      return;\n    }\n\n    each(source, function (value, key) {\n      if (!isPlain(value)) {\n        result[key] = value;\n        return;\n      }\n\n      if (!isPlain(result[key])) {\n        result[key] = {};\n      }\n\n      result[key] = mergeOptions$3(result[key], value);\n    });\n  });\n  return result;\n}\n\nvar MapSham = /*#__PURE__*/function () {\n  function MapSham() {\n    this.map_ = {};\n  }\n\n  var _proto = MapSham.prototype;\n\n  _proto.has = function has(key) {\n    return key in this.map_;\n  };\n\n  _proto[\"delete\"] = function _delete(key) {\n    var has = this.has(key);\n    delete this.map_[key];\n    return has;\n  };\n\n  _proto.set = function set(key, value) {\n    this.map_[key] = value;\n    return this;\n  };\n\n  _proto.forEach = function forEach(callback, thisArg) {\n    for (var key in this.map_) {\n      callback.call(thisArg, this.map_[key], key, this);\n    }\n  };\n\n  return MapSham;\n}();\n\nvar Map$1 = window$1.Map ? window$1.Map : MapSham;\n\nvar SetSham = /*#__PURE__*/function () {\n  function SetSham() {\n    this.set_ = {};\n  }\n\n  var _proto = SetSham.prototype;\n\n  _proto.has = function has(key) {\n    return key in this.set_;\n  };\n\n  _proto[\"delete\"] = function _delete(key) {\n    var has = this.has(key);\n    delete this.set_[key];\n    return has;\n  };\n\n  _proto.add = function add(key) {\n    this.set_[key] = 1;\n    return this;\n  };\n\n  _proto.forEach = function forEach(callback, thisArg) {\n    for (var key in this.set_) {\n      callback.call(thisArg, key, key, this);\n    }\n  };\n\n  return SetSham;\n}();\n\nvar Set = window$1.Set ? window$1.Set : SetSham;\n\n/**\n * Player Component - Base class for all UI objects\n *\n * @file component.js\n */\n/**\n * Base class for all UI Components.\n * Components are UI objects which represent both a javascript object and an element\n * in the DOM. They can be children of other components, and can have\n * children themselves.\n *\n * Components can also use methods from {@link EventTarget}\n */\n\nvar Component$1 = /*#__PURE__*/function () {\n  /**\n   * A callback that is called when a component is ready. Does not have any\n   * paramters and any callback value will be ignored.\n   *\n   * @callback Component~ReadyCallback\n   * @this Component\n   */\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Object[]} [options.children]\n   *        An array of children objects to intialize this component with. Children objects have\n   *        a name property that will be used if more than one component of the same type needs to be\n   *        added.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        Function that gets called when the `Component` is ready.\n   */\n  function Component(player, options, ready) {\n    // The component might be the player itself and we can't pass `this` to super\n    if (!player && this.play) {\n      this.player_ = player = this; // eslint-disable-line\n    } else {\n      this.player_ = player;\n    }\n\n    this.isDisposed_ = false; // Hold the reference to the parent component via `addChild` method\n\n    this.parentComponent_ = null; // Make a copy of prototype.options_ to protect against overriding defaults\n\n    this.options_ = mergeOptions$3({}, this.options_); // Updated options with supplied options\n\n    options = this.options_ = mergeOptions$3(this.options_, options); // Get ID from options or options element if one is supplied\n\n    this.id_ = options.id || options.el && options.el.id; // If there was no ID from the options, generate one\n\n    if (!this.id_) {\n      // Don't require the player ID function in the case of mock players\n      var id = player && player.id && player.id() || 'no_player';\n      this.id_ = id + \"_component_\" + newGUID();\n    }\n\n    this.name_ = options.name || null; // Create element if one wasn't provided in options\n\n    if (options.el) {\n      this.el_ = options.el;\n    } else if (options.createEl !== false) {\n      this.el_ = this.createEl();\n    } // if evented is anything except false, we want to mixin in evented\n\n\n    if (options.evented !== false) {\n      // Make this an evented object and use `el_`, if available, as its event bus\n      evented(this, {\n        eventBusKey: this.el_ ? 'el_' : null\n      });\n      this.handleLanguagechange = this.handleLanguagechange.bind(this);\n      this.on(this.player_, 'languagechange', this.handleLanguagechange);\n    }\n\n    stateful(this, this.constructor.defaultState);\n    this.children_ = [];\n    this.childIndex_ = {};\n    this.childNameIndex_ = {};\n    this.setTimeoutIds_ = new Set();\n    this.setIntervalIds_ = new Set();\n    this.rafIds_ = new Set();\n    this.namedRafs_ = new Map$1();\n    this.clearingTimersOnDispose_ = false; // Add any child components in options\n\n    if (options.initChildren !== false) {\n      this.initChildren();\n    } // Don't want to trigger ready here or it will go before init is actually\n    // finished for all children that run this constructor\n\n\n    this.ready(ready);\n\n    if (options.reportTouchActivity !== false) {\n      this.enableTouchActivity();\n    }\n  }\n  /**\n   * Dispose of the `Component` and all child components.\n   *\n   * @fires Component#dispose\n   */\n\n\n  var _proto = Component.prototype;\n\n  _proto.dispose = function dispose() {\n    // Bail out if the component has already been disposed.\n    if (this.isDisposed_) {\n      return;\n    }\n\n    if (this.readyQueue_) {\n      this.readyQueue_.length = 0;\n    }\n    /**\n     * Triggered when a `Component` is disposed.\n     *\n     * @event Component#dispose\n     * @type {EventTarget~Event}\n     *\n     * @property {boolean} [bubbles=false]\n     *           set to false so that the dispose event does not\n     *           bubble up\n     */\n\n\n    this.trigger({\n      type: 'dispose',\n      bubbles: false\n    });\n    this.isDisposed_ = true; // Dispose all children.\n\n    if (this.children_) {\n      for (var i = this.children_.length - 1; i >= 0; i--) {\n        if (this.children_[i].dispose) {\n          this.children_[i].dispose();\n        }\n      }\n    } // Delete child references\n\n\n    this.children_ = null;\n    this.childIndex_ = null;\n    this.childNameIndex_ = null;\n    this.parentComponent_ = null;\n\n    if (this.el_) {\n      // Remove element from DOM\n      if (this.el_.parentNode) {\n        this.el_.parentNode.removeChild(this.el_);\n      }\n\n      this.el_ = null;\n    } // remove reference to the player after disposing of the element\n\n\n    this.player_ = null;\n  }\n  /**\n   * Determine whether or not this component has been disposed.\n   *\n   * @return {boolean}\n   *         If the component has been disposed, will be `true`. Otherwise, `false`.\n   */\n  ;\n\n  _proto.isDisposed = function isDisposed() {\n    return Boolean(this.isDisposed_);\n  }\n  /**\n   * Return the {@link Player} that the `Component` has attached to.\n   *\n   * @return {Player}\n   *         The player that this `Component` has attached to.\n   */\n  ;\n\n  _proto.player = function player() {\n    return this.player_;\n  }\n  /**\n   * Deep merge of options objects with new options.\n   * > Note: When both `obj` and `options` contain properties whose values are objects.\n   *         The two properties get merged using {@link module:mergeOptions}\n   *\n   * @param {Object} obj\n   *        The object that contains new options.\n   *\n   * @return {Object}\n   *         A new object of `this.options_` and `obj` merged together.\n   */\n  ;\n\n  _proto.options = function options(obj) {\n    if (!obj) {\n      return this.options_;\n    }\n\n    this.options_ = mergeOptions$3(this.options_, obj);\n    return this.options_;\n  }\n  /**\n   * Get the `Component`s DOM element\n   *\n   * @return {Element}\n   *         The DOM element for this `Component`.\n   */\n  ;\n\n  _proto.el = function el() {\n    return this.el_;\n  }\n  /**\n   * Create the `Component`s DOM element.\n   *\n   * @param {string} [tagName]\n   *        Element's DOM node type. e.g. 'div'\n   *\n   * @param {Object} [properties]\n   *        An object of properties that should be set.\n   *\n   * @param {Object} [attributes]\n   *        An object of attributes that should be set.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n  ;\n\n  _proto.createEl = function createEl$1(tagName, properties, attributes) {\n    return createEl(tagName, properties, attributes);\n  }\n  /**\n   * Localize a string given the string in english.\n   *\n   * If tokens are provided, it'll try and run a simple token replacement on the provided string.\n   * The tokens it looks for look like `{1}` with the index being 1-indexed into the tokens array.\n   *\n   * If a `defaultValue` is provided, it'll use that over `string`,\n   * if a value isn't found in provided language files.\n   * This is useful if you want to have a descriptive key for token replacement\n   * but have a succinct localized string and not require `en.json` to be included.\n   *\n   * Currently, it is used for the progress bar timing.\n   * ```js\n   * {\n   *   \"progress bar timing: currentTime={1} duration={2}\": \"{1} of {2}\"\n   * }\n   * ```\n   * It is then used like so:\n   * ```js\n   * this.localize('progress bar timing: currentTime={1} duration{2}',\n   *               [this.player_.currentTime(), this.player_.duration()],\n   *               '{1} of {2}');\n   * ```\n   *\n   * Which outputs something like: `01:23 of 24:56`.\n   *\n   *\n   * @param {string} string\n   *        The string to localize and the key to lookup in the language files.\n   * @param {string[]} [tokens]\n   *        If the current item has token replacements, provide the tokens here.\n   * @param {string} [defaultValue]\n   *        Defaults to `string`. Can be a default value to use for token replacement\n   *        if the lookup key is needed to be separate.\n   *\n   * @return {string}\n   *         The localized string or if no localization exists the english string.\n   */\n  ;\n\n  _proto.localize = function localize(string, tokens, defaultValue) {\n    if (defaultValue === void 0) {\n      defaultValue = string;\n    }\n\n    var code = this.player_.language && this.player_.language();\n    var languages = this.player_.languages && this.player_.languages();\n    var language = languages && languages[code];\n    var primaryCode = code && code.split('-')[0];\n    var primaryLang = languages && languages[primaryCode];\n    var localizedString = defaultValue;\n\n    if (language && language[string]) {\n      localizedString = language[string];\n    } else if (primaryLang && primaryLang[string]) {\n      localizedString = primaryLang[string];\n    }\n\n    if (tokens) {\n      localizedString = localizedString.replace(/\\{(\\d+)\\}/g, function (match, index) {\n        var value = tokens[index - 1];\n        var ret = value;\n\n        if (typeof value === 'undefined') {\n          ret = match;\n        }\n\n        return ret;\n      });\n    }\n\n    return localizedString;\n  }\n  /**\n   * Handles language change for the player in components. Should be overriden by sub-components.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.handleLanguagechange = function handleLanguagechange() {}\n  /**\n   * Return the `Component`s DOM element. This is where children get inserted.\n   * This will usually be the the same as the element returned in {@link Component#el}.\n   *\n   * @return {Element}\n   *         The content element for this `Component`.\n   */\n  ;\n\n  _proto.contentEl = function contentEl() {\n    return this.contentEl_ || this.el_;\n  }\n  /**\n   * Get this `Component`s ID\n   *\n   * @return {string}\n   *         The id of this `Component`\n   */\n  ;\n\n  _proto.id = function id() {\n    return this.id_;\n  }\n  /**\n   * Get the `Component`s name. The name gets used to reference the `Component`\n   * and is set during registration.\n   *\n   * @return {string}\n   *         The name of this `Component`.\n   */\n  ;\n\n  _proto.name = function name() {\n    return this.name_;\n  }\n  /**\n   * Get an array of all child components\n   *\n   * @return {Array}\n   *         The children\n   */\n  ;\n\n  _proto.children = function children() {\n    return this.children_;\n  }\n  /**\n   * Returns the child `Component` with the given `id`.\n   *\n   * @param {string} id\n   *        The id of the child `Component` to get.\n   *\n   * @return {Component|undefined}\n   *         The child `Component` with the given `id` or undefined.\n   */\n  ;\n\n  _proto.getChildById = function getChildById(id) {\n    return this.childIndex_[id];\n  }\n  /**\n   * Returns the child `Component` with the given `name`.\n   *\n   * @param {string} name\n   *        The name of the child `Component` to get.\n   *\n   * @return {Component|undefined}\n   *         The child `Component` with the given `name` or undefined.\n   */\n  ;\n\n  _proto.getChild = function getChild(name) {\n    if (!name) {\n      return;\n    }\n\n    return this.childNameIndex_[name];\n  }\n  /**\n   * Returns the descendant `Component` following the givent\n   * descendant `names`. For instance ['foo', 'bar', 'baz'] would\n   * try to get 'foo' on the current component, 'bar' on the 'foo'\n   * component and 'baz' on the 'bar' component and return undefined\n   * if any of those don't exist.\n   *\n   * @param {...string[]|...string} names\n   *        The name of the child `Component` to get.\n   *\n   * @return {Component|undefined}\n   *         The descendant `Component` following the given descendant\n   *         `names` or undefined.\n   */\n  ;\n\n  _proto.getDescendant = function getDescendant() {\n    for (var _len = arguments.length, names = new Array(_len), _key = 0; _key < _len; _key++) {\n      names[_key] = arguments[_key];\n    }\n\n    // flatten array argument into the main array\n    names = names.reduce(function (acc, n) {\n      return acc.concat(n);\n    }, []);\n    var currentChild = this;\n\n    for (var i = 0; i < names.length; i++) {\n      currentChild = currentChild.getChild(names[i]);\n\n      if (!currentChild || !currentChild.getChild) {\n        return;\n      }\n    }\n\n    return currentChild;\n  }\n  /**\n   * Add a child `Component` inside the current `Component`.\n   *\n   *\n   * @param {string|Component} child\n   *        The name or instance of a child to add.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of options that will get passed to children of\n   *        the child.\n   *\n   * @param {number} [index=this.children_.length]\n   *        The index to attempt to add a child into.\n   *\n   * @return {Component}\n   *         The `Component` that gets added as a child. When using a string the\n   *         `Component` will get created by this process.\n   */\n  ;\n\n  _proto.addChild = function addChild(child, options, index) {\n    if (options === void 0) {\n      options = {};\n    }\n\n    if (index === void 0) {\n      index = this.children_.length;\n    }\n\n    var component;\n    var componentName; // If child is a string, create component with options\n\n    if (typeof child === 'string') {\n      componentName = toTitleCase$1(child);\n      var componentClassName = options.componentClass || componentName; // Set name through options\n\n      options.name = componentName; // Create a new object & element for this controls set\n      // If there's no .player_, this is a player\n\n      var ComponentClass = Component.getComponent(componentClassName);\n\n      if (!ComponentClass) {\n        throw new Error(\"Component \" + componentClassName + \" does not exist\");\n      } // data stored directly on the videojs object may be\n      // misidentified as a component to retain\n      // backwards-compatibility with 4.x. check to make sure the\n      // component class can be instantiated.\n\n\n      if (typeof ComponentClass !== 'function') {\n        return null;\n      }\n\n      component = new ComponentClass(this.player_ || this, options); // child is a component instance\n    } else {\n      component = child;\n    }\n\n    if (component.parentComponent_) {\n      component.parentComponent_.removeChild(component);\n    }\n\n    this.children_.splice(index, 0, component);\n    component.parentComponent_ = this;\n\n    if (typeof component.id === 'function') {\n      this.childIndex_[component.id()] = component;\n    } // If a name wasn't used to create the component, check if we can use the\n    // name function of the component\n\n\n    componentName = componentName || component.name && toTitleCase$1(component.name());\n\n    if (componentName) {\n      this.childNameIndex_[componentName] = component;\n      this.childNameIndex_[toLowerCase(componentName)] = component;\n    } // Add the UI object's element to the container div (box)\n    // Having an element is not required\n\n\n    if (typeof component.el === 'function' && component.el()) {\n      // If inserting before a component, insert before that component's element\n      var refNode = null;\n\n      if (this.children_[index + 1]) {\n        // Most children are components, but the video tech is an HTML element\n        if (this.children_[index + 1].el_) {\n          refNode = this.children_[index + 1].el_;\n        } else if (isEl(this.children_[index + 1])) {\n          refNode = this.children_[index + 1];\n        }\n      }\n\n      this.contentEl().insertBefore(component.el(), refNode);\n    } // Return so it can stored on parent object if desired.\n\n\n    return component;\n  }\n  /**\n   * Remove a child `Component` from this `Component`s list of children. Also removes\n   * the child `Component`s element from this `Component`s element.\n   *\n   * @param {Component} component\n   *        The child `Component` to remove.\n   */\n  ;\n\n  _proto.removeChild = function removeChild(component) {\n    if (typeof component === 'string') {\n      component = this.getChild(component);\n    }\n\n    if (!component || !this.children_) {\n      return;\n    }\n\n    var childFound = false;\n\n    for (var i = this.children_.length - 1; i >= 0; i--) {\n      if (this.children_[i] === component) {\n        childFound = true;\n        this.children_.splice(i, 1);\n        break;\n      }\n    }\n\n    if (!childFound) {\n      return;\n    }\n\n    component.parentComponent_ = null;\n    this.childIndex_[component.id()] = null;\n    this.childNameIndex_[toTitleCase$1(component.name())] = null;\n    this.childNameIndex_[toLowerCase(component.name())] = null;\n    var compEl = component.el();\n\n    if (compEl && compEl.parentNode === this.contentEl()) {\n      this.contentEl().removeChild(component.el());\n    }\n  }\n  /**\n   * Add and initialize default child `Component`s based upon options.\n   */\n  ;\n\n  _proto.initChildren = function initChildren() {\n    var _this = this;\n\n    var children = this.options_.children;\n\n    if (children) {\n      // `this` is `parent`\n      var parentOptions = this.options_;\n\n      var handleAdd = function handleAdd(child) {\n        var name = child.name;\n        var opts = child.opts; // Allow options for children to be set at the parent options\n        // e.g. videojs(id, { controlBar: false });\n        // instead of videojs(id, { children: { controlBar: false });\n\n        if (parentOptions[name] !== undefined) {\n          opts = parentOptions[name];\n        } // Allow for disabling default components\n        // e.g. options['children']['posterImage'] = false\n\n\n        if (opts === false) {\n          return;\n        } // Allow options to be passed as a simple boolean if no configuration\n        // is necessary.\n\n\n        if (opts === true) {\n          opts = {};\n        } // We also want to pass the original player options\n        // to each component as well so they don't need to\n        // reach back into the player for options later.\n\n\n        opts.playerOptions = _this.options_.playerOptions; // Create and add the child component.\n        // Add a direct reference to the child by name on the parent instance.\n        // If two of the same component are used, different names should be supplied\n        // for each\n\n        var newChild = _this.addChild(name, opts);\n\n        if (newChild) {\n          _this[name] = newChild;\n        }\n      }; // Allow for an array of children details to passed in the options\n\n\n      var workingChildren;\n      var Tech = Component.getComponent('Tech');\n\n      if (Array.isArray(children)) {\n        workingChildren = children;\n      } else {\n        workingChildren = Object.keys(children);\n      }\n\n      workingChildren // children that are in this.options_ but also in workingChildren  would\n      // give us extra children we do not want. So, we want to filter them out.\n      .concat(Object.keys(this.options_).filter(function (child) {\n        return !workingChildren.some(function (wchild) {\n          if (typeof wchild === 'string') {\n            return child === wchild;\n          }\n\n          return child === wchild.name;\n        });\n      })).map(function (child) {\n        var name;\n        var opts;\n\n        if (typeof child === 'string') {\n          name = child;\n          opts = children[name] || _this.options_[name] || {};\n        } else {\n          name = child.name;\n          opts = child;\n        }\n\n        return {\n          name: name,\n          opts: opts\n        };\n      }).filter(function (child) {\n        // we have to make sure that child.name isn't in the techOrder since\n        // techs are registerd as Components but can't aren't compatible\n        // See https://github.com/videojs/video.js/issues/2772\n        var c = Component.getComponent(child.opts.componentClass || toTitleCase$1(child.name));\n        return c && !Tech.isTech(c);\n      }).forEach(handleAdd);\n    }\n  }\n  /**\n   * Builds the default DOM class name. Should be overriden by sub-components.\n   *\n   * @return {string}\n   *         The DOM class name for this object.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    // Child classes can include a function that does:\n    // return 'CLASS NAME' + this._super();\n    return '';\n  }\n  /**\n   * Bind a listener to the component's ready state.\n   * Different from event listeners in that if the ready event has already happened\n   * it will trigger the function immediately.\n   *\n   * @return {Component}\n   *         Returns itself; method can be chained.\n   */\n  ;\n\n  _proto.ready = function ready(fn, sync) {\n    if (sync === void 0) {\n      sync = false;\n    }\n\n    if (!fn) {\n      return;\n    }\n\n    if (!this.isReady_) {\n      this.readyQueue_ = this.readyQueue_ || [];\n      this.readyQueue_.push(fn);\n      return;\n    }\n\n    if (sync) {\n      fn.call(this);\n    } else {\n      // Call the function asynchronously by default for consistency\n      this.setTimeout(fn, 1);\n    }\n  }\n  /**\n   * Trigger all the ready listeners for this `Component`.\n   *\n   * @fires Component#ready\n   */\n  ;\n\n  _proto.triggerReady = function triggerReady() {\n    this.isReady_ = true; // Ensure ready is triggered asynchronously\n\n    this.setTimeout(function () {\n      var readyQueue = this.readyQueue_; // Reset Ready Queue\n\n      this.readyQueue_ = [];\n\n      if (readyQueue && readyQueue.length > 0) {\n        readyQueue.forEach(function (fn) {\n          fn.call(this);\n        }, this);\n      } // Allow for using event listeners also\n\n      /**\n       * Triggered when a `Component` is ready.\n       *\n       * @event Component#ready\n       * @type {EventTarget~Event}\n       */\n\n\n      this.trigger('ready');\n    }, 1);\n  }\n  /**\n   * Find a single DOM element matching a `selector`. This can be within the `Component`s\n   * `contentEl()` or another custom context.\n   *\n   * @param {string} selector\n   *        A valid CSS selector, which will be passed to `querySelector`.\n   *\n   * @param {Element|string} [context=this.contentEl()]\n   *        A DOM element within which to query. Can also be a selector string in\n   *        which case the first matching element will get used as context. If\n   *        missing `this.contentEl()` gets used. If  `this.contentEl()` returns\n   *        nothing it falls back to `document`.\n   *\n   * @return {Element|null}\n   *         the dom element that was found, or null\n   *\n   * @see [Information on CSS Selectors](https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Getting_Started/Selectors)\n   */\n  ;\n\n  _proto.$ = function $$1(selector, context) {\n    return $(selector, context || this.contentEl());\n  }\n  /**\n   * Finds all DOM element matching a `selector`. This can be within the `Component`s\n   * `contentEl()` or another custom context.\n   *\n   * @param {string} selector\n   *        A valid CSS selector, which will be passed to `querySelectorAll`.\n   *\n   * @param {Element|string} [context=this.contentEl()]\n   *        A DOM element within which to query. Can also be a selector string in\n   *        which case the first matching element will get used as context. If\n   *        missing `this.contentEl()` gets used. If  `this.contentEl()` returns\n   *        nothing it falls back to `document`.\n   *\n   * @return {NodeList}\n   *         a list of dom elements that were found\n   *\n   * @see [Information on CSS Selectors](https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Getting_Started/Selectors)\n   */\n  ;\n\n  _proto.$$ = function $$$1(selector, context) {\n    return $$(selector, context || this.contentEl());\n  }\n  /**\n   * Check if a component's element has a CSS class name.\n   *\n   * @param {string} classToCheck\n   *        CSS class name to check.\n   *\n   * @return {boolean}\n   *         - True if the `Component` has the class.\n   *         - False if the `Component` does not have the class`\n   */\n  ;\n\n  _proto.hasClass = function hasClass$1(classToCheck) {\n    return hasClass(this.el_, classToCheck);\n  }\n  /**\n   * Add a CSS class name to the `Component`s element.\n   *\n   * @param {string} classToAdd\n   *        CSS class name to add\n   */\n  ;\n\n  _proto.addClass = function addClass$1(classToAdd) {\n    addClass(this.el_, classToAdd);\n  }\n  /**\n   * Remove a CSS class name from the `Component`s element.\n   *\n   * @param {string} classToRemove\n   *        CSS class name to remove\n   */\n  ;\n\n  _proto.removeClass = function removeClass$1(classToRemove) {\n    removeClass(this.el_, classToRemove);\n  }\n  /**\n   * Add or remove a CSS class name from the component's element.\n   * - `classToToggle` gets added when {@link Component#hasClass} would return false.\n   * - `classToToggle` gets removed when {@link Component#hasClass} would return true.\n   *\n   * @param  {string} classToToggle\n   *         The class to add or remove based on (@link Component#hasClass}\n   *\n   * @param  {boolean|Dom~predicate} [predicate]\n   *         An {@link Dom~predicate} function or a boolean\n   */\n  ;\n\n  _proto.toggleClass = function toggleClass$1(classToToggle, predicate) {\n    toggleClass(this.el_, classToToggle, predicate);\n  }\n  /**\n   * Show the `Component`s element if it is hidden by removing the\n   * 'vjs-hidden' class name from it.\n   */\n  ;\n\n  _proto.show = function show() {\n    this.removeClass('vjs-hidden');\n  }\n  /**\n   * Hide the `Component`s element if it is currently showing by adding the\n   * 'vjs-hidden` class name to it.\n   */\n  ;\n\n  _proto.hide = function hide() {\n    this.addClass('vjs-hidden');\n  }\n  /**\n   * Lock a `Component`s element in its visible state by adding the 'vjs-lock-showing'\n   * class name to it. Used during fadeIn/fadeOut.\n   *\n   * @private\n   */\n  ;\n\n  _proto.lockShowing = function lockShowing() {\n    this.addClass('vjs-lock-showing');\n  }\n  /**\n   * Unlock a `Component`s element from its visible state by removing the 'vjs-lock-showing'\n   * class name from it. Used during fadeIn/fadeOut.\n   *\n   * @private\n   */\n  ;\n\n  _proto.unlockShowing = function unlockShowing() {\n    this.removeClass('vjs-lock-showing');\n  }\n  /**\n   * Get the value of an attribute on the `Component`s element.\n   *\n   * @param {string} attribute\n   *        Name of the attribute to get the value from.\n   *\n   * @return {string|null}\n   *         - The value of the attribute that was asked for.\n   *         - Can be an empty string on some browsers if the attribute does not exist\n   *           or has no value\n   *         - Most browsers will return null if the attibute does not exist or has\n   *           no value.\n   *\n   * @see [DOM API]{@link https://developer.mozilla.org/en-US/docs/Web/API/Element/getAttribute}\n   */\n  ;\n\n  _proto.getAttribute = function getAttribute$1(attribute) {\n    return getAttribute(this.el_, attribute);\n  }\n  /**\n   * Set the value of an attribute on the `Component`'s element\n   *\n   * @param {string} attribute\n   *        Name of the attribute to set.\n   *\n   * @param {string} value\n   *        Value to set the attribute to.\n   *\n   * @see [DOM API]{@link https://developer.mozilla.org/en-US/docs/Web/API/Element/setAttribute}\n   */\n  ;\n\n  _proto.setAttribute = function setAttribute$1(attribute, value) {\n    setAttribute(this.el_, attribute, value);\n  }\n  /**\n   * Remove an attribute from the `Component`s element.\n   *\n   * @param {string} attribute\n   *        Name of the attribute to remove.\n   *\n   * @see [DOM API]{@link https://developer.mozilla.org/en-US/docs/Web/API/Element/removeAttribute}\n   */\n  ;\n\n  _proto.removeAttribute = function removeAttribute$1(attribute) {\n    removeAttribute(this.el_, attribute);\n  }\n  /**\n   * Get or set the width of the component based upon the CSS styles.\n   * See {@link Component#dimension} for more detailed information.\n   *\n   * @param {number|string} [num]\n   *        The width that you want to set postfixed with '%', 'px' or nothing.\n   *\n   * @param {boolean} [skipListeners]\n   *        Skip the componentresize event trigger\n   *\n   * @return {number|string}\n   *         The width when getting, zero if there is no width. Can be a string\n   *           postpixed with '%' or 'px'.\n   */\n  ;\n\n  _proto.width = function width(num, skipListeners) {\n    return this.dimension('width', num, skipListeners);\n  }\n  /**\n   * Get or set the height of the component based upon the CSS styles.\n   * See {@link Component#dimension} for more detailed information.\n   *\n   * @param {number|string} [num]\n   *        The height that you want to set postfixed with '%', 'px' or nothing.\n   *\n   * @param {boolean} [skipListeners]\n   *        Skip the componentresize event trigger\n   *\n   * @return {number|string}\n   *         The width when getting, zero if there is no width. Can be a string\n   *         postpixed with '%' or 'px'.\n   */\n  ;\n\n  _proto.height = function height(num, skipListeners) {\n    return this.dimension('height', num, skipListeners);\n  }\n  /**\n   * Set both the width and height of the `Component` element at the same time.\n   *\n   * @param  {number|string} width\n   *         Width to set the `Component`s element to.\n   *\n   * @param  {number|string} height\n   *         Height to set the `Component`s element to.\n   */\n  ;\n\n  _proto.dimensions = function dimensions(width, height) {\n    // Skip componentresize listeners on width for optimization\n    this.width(width, true);\n    this.height(height);\n  }\n  /**\n   * Get or set width or height of the `Component` element. This is the shared code\n   * for the {@link Component#width} and {@link Component#height}.\n   *\n   * Things to know:\n   * - If the width or height in an number this will return the number postfixed with 'px'.\n   * - If the width/height is a percent this will return the percent postfixed with '%'\n   * - Hidden elements have a width of 0 with `window.getComputedStyle`. This function\n   *   defaults to the `Component`s `style.width` and falls back to `window.getComputedStyle`.\n   *   See [this]{@link http://www.foliotek.com/devblog/getting-the-width-of-a-hidden-element-with-jquery-using-width/}\n   *   for more information\n   * - If you want the computed style of the component, use {@link Component#currentWidth}\n   *   and {@link {Component#currentHeight}\n   *\n   * @fires Component#componentresize\n   *\n   * @param {string} widthOrHeight\n   8        'width' or 'height'\n   *\n   * @param  {number|string} [num]\n   8         New dimension\n   *\n   * @param  {boolean} [skipListeners]\n   *         Skip componentresize event trigger\n   *\n   * @return {number}\n   *         The dimension when getting or 0 if unset\n   */\n  ;\n\n  _proto.dimension = function dimension(widthOrHeight, num, skipListeners) {\n    if (num !== undefined) {\n      // Set to zero if null or literally NaN (NaN !== NaN)\n      if (num === null || num !== num) {\n        num = 0;\n      } // Check if using css width/height (% or px) and adjust\n\n\n      if (('' + num).indexOf('%') !== -1 || ('' + num).indexOf('px') !== -1) {\n        this.el_.style[widthOrHeight] = num;\n      } else if (num === 'auto') {\n        this.el_.style[widthOrHeight] = '';\n      } else {\n        this.el_.style[widthOrHeight] = num + 'px';\n      } // skipListeners allows us to avoid triggering the resize event when setting both width and height\n\n\n      if (!skipListeners) {\n        /**\n         * Triggered when a component is resized.\n         *\n         * @event Component#componentresize\n         * @type {EventTarget~Event}\n         */\n        this.trigger('componentresize');\n      }\n\n      return;\n    } // Not setting a value, so getting it\n    // Make sure element exists\n\n\n    if (!this.el_) {\n      return 0;\n    } // Get dimension value from style\n\n\n    var val = this.el_.style[widthOrHeight];\n    var pxIndex = val.indexOf('px');\n\n    if (pxIndex !== -1) {\n      // Return the pixel value with no 'px'\n      return parseInt(val.slice(0, pxIndex), 10);\n    } // No px so using % or no style was set, so falling back to offsetWidth/height\n    // If component has display:none, offset will return 0\n    // TODO: handle display:none and no dimension style using px\n\n\n    return parseInt(this.el_['offset' + toTitleCase$1(widthOrHeight)], 10);\n  }\n  /**\n   * Get the computed width or the height of the component's element.\n   *\n   * Uses `window.getComputedStyle`.\n   *\n   * @param {string} widthOrHeight\n   *        A string containing 'width' or 'height'. Whichever one you want to get.\n   *\n   * @return {number}\n   *         The dimension that gets asked for or 0 if nothing was set\n   *         for that dimension.\n   */\n  ;\n\n  _proto.currentDimension = function currentDimension(widthOrHeight) {\n    var computedWidthOrHeight = 0;\n\n    if (widthOrHeight !== 'width' && widthOrHeight !== 'height') {\n      throw new Error('currentDimension only accepts width or height value');\n    }\n\n    computedWidthOrHeight = computedStyle(this.el_, widthOrHeight); // remove 'px' from variable and parse as integer\n\n    computedWidthOrHeight = parseFloat(computedWidthOrHeight); // if the computed value is still 0, it's possible that the browser is lying\n    // and we want to check the offset values.\n    // This code also runs wherever getComputedStyle doesn't exist.\n\n    if (computedWidthOrHeight === 0 || isNaN(computedWidthOrHeight)) {\n      var rule = \"offset\" + toTitleCase$1(widthOrHeight);\n      computedWidthOrHeight = this.el_[rule];\n    }\n\n    return computedWidthOrHeight;\n  }\n  /**\n   * An object that contains width and height values of the `Component`s\n   * computed style. Uses `window.getComputedStyle`.\n   *\n   * @typedef {Object} Component~DimensionObject\n   *\n   * @property {number} width\n   *           The width of the `Component`s computed style.\n   *\n   * @property {number} height\n   *           The height of the `Component`s computed style.\n   */\n\n  /**\n   * Get an object that contains computed width and height values of the\n   * component's element.\n   *\n   * Uses `window.getComputedStyle`.\n   *\n   * @return {Component~DimensionObject}\n   *         The computed dimensions of the component's element.\n   */\n  ;\n\n  _proto.currentDimensions = function currentDimensions() {\n    return {\n      width: this.currentDimension('width'),\n      height: this.currentDimension('height')\n    };\n  }\n  /**\n   * Get the computed width of the component's element.\n   *\n   * Uses `window.getComputedStyle`.\n   *\n   * @return {number}\n   *         The computed width of the component's element.\n   */\n  ;\n\n  _proto.currentWidth = function currentWidth() {\n    return this.currentDimension('width');\n  }\n  /**\n   * Get the computed height of the component's element.\n   *\n   * Uses `window.getComputedStyle`.\n   *\n   * @return {number}\n   *         The computed height of the component's element.\n   */\n  ;\n\n  _proto.currentHeight = function currentHeight() {\n    return this.currentDimension('height');\n  }\n  /**\n   * Set the focus to this component\n   */\n  ;\n\n  _proto.focus = function focus() {\n    this.el_.focus();\n  }\n  /**\n   * Remove the focus from this component\n   */\n  ;\n\n  _proto.blur = function blur() {\n    this.el_.blur();\n  }\n  /**\n   * When this Component receives a `keydown` event which it does not process,\n   *  it passes the event to the Player for handling.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    if (this.player_) {\n      // We only stop propagation here because we want unhandled events to fall\n      // back to the browser. Exclude Tab for focus trapping.\n      if (!keycode.isEventKey(event, 'Tab')) {\n        event.stopPropagation();\n      }\n\n      this.player_.handleKeyDown(event);\n    }\n  }\n  /**\n   * Many components used to have a `handleKeyPress` method, which was poorly\n   * named because it listened to a `keydown` event. This method name now\n   * delegates to `handleKeyDown`. This means anyone calling `handleKeyPress`\n   * will not see their method calls stop working.\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to be called.\n   */\n  ;\n\n  _proto.handleKeyPress = function handleKeyPress(event) {\n    this.handleKeyDown(event);\n  }\n  /**\n   * Emit a 'tap' events when touch event support gets detected. This gets used to\n   * support toggling the controls through a tap on the video. They get enabled\n   * because every sub-component would have extra overhead otherwise.\n   *\n   * @private\n   * @fires Component#tap\n   * @listens Component#touchstart\n   * @listens Component#touchmove\n   * @listens Component#touchleave\n   * @listens Component#touchcancel\n   * @listens Component#touchend\n    */\n  ;\n\n  _proto.emitTapEvents = function emitTapEvents() {\n    // Track the start time so we can determine how long the touch lasted\n    var touchStart = 0;\n    var firstTouch = null; // Maximum movement allowed during a touch event to still be considered a tap\n    // Other popular libs use anywhere from 2 (hammer.js) to 15,\n    // so 10 seems like a nice, round number.\n\n    var tapMovementThreshold = 10; // The maximum length a touch can be while still being considered a tap\n\n    var touchTimeThreshold = 200;\n    var couldBeTap;\n    this.on('touchstart', function (event) {\n      // If more than one finger, don't consider treating this as a click\n      if (event.touches.length === 1) {\n        // Copy pageX/pageY from the object\n        firstTouch = {\n          pageX: event.touches[0].pageX,\n          pageY: event.touches[0].pageY\n        }; // Record start time so we can detect a tap vs. \"touch and hold\"\n\n        touchStart = window$1.performance.now(); // Reset couldBeTap tracking\n\n        couldBeTap = true;\n      }\n    });\n    this.on('touchmove', function (event) {\n      // If more than one finger, don't consider treating this as a click\n      if (event.touches.length > 1) {\n        couldBeTap = false;\n      } else if (firstTouch) {\n        // Some devices will throw touchmoves for all but the slightest of taps.\n        // So, if we moved only a small distance, this could still be a tap\n        var xdiff = event.touches[0].pageX - firstTouch.pageX;\n        var ydiff = event.touches[0].pageY - firstTouch.pageY;\n        var touchDistance = Math.sqrt(xdiff * xdiff + ydiff * ydiff);\n\n        if (touchDistance > tapMovementThreshold) {\n          couldBeTap = false;\n        }\n      }\n    });\n\n    var noTap = function noTap() {\n      couldBeTap = false;\n    }; // TODO: Listen to the original target. http://youtu.be/DujfpXOKUp8?t=13m8s\n\n\n    this.on('touchleave', noTap);\n    this.on('touchcancel', noTap); // When the touch ends, measure how long it took and trigger the appropriate\n    // event\n\n    this.on('touchend', function (event) {\n      firstTouch = null; // Proceed only if the touchmove/leave/cancel event didn't happen\n\n      if (couldBeTap === true) {\n        // Measure how long the touch lasted\n        var touchTime = window$1.performance.now() - touchStart; // Make sure the touch was less than the threshold to be considered a tap\n\n        if (touchTime < touchTimeThreshold) {\n          // Don't let browser turn this into a click\n          event.preventDefault();\n          /**\n           * Triggered when a `Component` is tapped.\n           *\n           * @event Component#tap\n           * @type {EventTarget~Event}\n           */\n\n          this.trigger('tap'); // It may be good to copy the touchend event object and change the\n          // type to tap, if the other event properties aren't exact after\n          // Events.fixEvent runs (e.g. event.target)\n        }\n      }\n    });\n  }\n  /**\n   * This function reports user activity whenever touch events happen. This can get\n   * turned off by any sub-components that wants touch events to act another way.\n   *\n   * Report user touch activity when touch events occur. User activity gets used to\n   * determine when controls should show/hide. It is simple when it comes to mouse\n   * events, because any mouse event should show the controls. So we capture mouse\n   * events that bubble up to the player and report activity when that happens.\n   * With touch events it isn't as easy as `touchstart` and `touchend` toggle player\n   * controls. So touch events can't help us at the player level either.\n   *\n   * User activity gets checked asynchronously. So what could happen is a tap event\n   * on the video turns the controls off. Then the `touchend` event bubbles up to\n   * the player. Which, if it reported user activity, would turn the controls right\n   * back on. We also don't want to completely block touch events from bubbling up.\n   * Furthermore a `touchmove` event and anything other than a tap, should not turn\n   * controls back on.\n   *\n   * @listens Component#touchstart\n   * @listens Component#touchmove\n   * @listens Component#touchend\n   * @listens Component#touchcancel\n   */\n  ;\n\n  _proto.enableTouchActivity = function enableTouchActivity() {\n    // Don't continue if the root player doesn't support reporting user activity\n    if (!this.player() || !this.player().reportUserActivity) {\n      return;\n    } // listener for reporting that the user is active\n\n\n    var report = bind(this.player(), this.player().reportUserActivity);\n    var touchHolding;\n    this.on('touchstart', function () {\n      report(); // For as long as the they are touching the device or have their mouse down,\n      // we consider them active even if they're not moving their finger or mouse.\n      // So we want to continue to update that they are active\n\n      this.clearInterval(touchHolding); // report at the same interval as activityCheck\n\n      touchHolding = this.setInterval(report, 250);\n    });\n\n    var touchEnd = function touchEnd(event) {\n      report(); // stop the interval that maintains activity if the touch is holding\n\n      this.clearInterval(touchHolding);\n    };\n\n    this.on('touchmove', report);\n    this.on('touchend', touchEnd);\n    this.on('touchcancel', touchEnd);\n  }\n  /**\n   * A callback that has no parameters and is bound into `Component`s context.\n   *\n   * @callback Component~GenericCallback\n   * @this Component\n   */\n\n  /**\n   * Creates a function that runs after an `x` millisecond timeout. This function is a\n   * wrapper around `window.setTimeout`. There are a few reasons to use this one\n   * instead though:\n   * 1. It gets cleared via  {@link Component#clearTimeout} when\n   *    {@link Component#dispose} gets called.\n   * 2. The function callback will gets turned into a {@link Component~GenericCallback}\n   *\n   * > Note: You can't use `window.clearTimeout` on the id returned by this function. This\n   *         will cause its dispose listener not to get cleaned up! Please use\n   *         {@link Component#clearTimeout} or {@link Component#dispose} instead.\n   *\n   * @param {Component~GenericCallback} fn\n   *        The function that will be run after `timeout`.\n   *\n   * @param {number} timeout\n   *        Timeout in milliseconds to delay before executing the specified function.\n   *\n   * @return {number}\n   *         Returns a timeout ID that gets used to identify the timeout. It can also\n   *         get used in {@link Component#clearTimeout} to clear the timeout that\n   *         was set.\n   *\n   * @listens Component#dispose\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/setTimeout}\n   */\n  ;\n\n  _proto.setTimeout = function setTimeout(fn, timeout) {\n    var _this2 = this;\n\n    // declare as variables so they are properly available in timeout function\n    // eslint-disable-next-line\n    var timeoutId;\n    fn = bind(this, fn);\n    this.clearTimersOnDispose_();\n    timeoutId = window$1.setTimeout(function () {\n      if (_this2.setTimeoutIds_.has(timeoutId)) {\n        _this2.setTimeoutIds_[\"delete\"](timeoutId);\n      }\n\n      fn();\n    }, timeout);\n    this.setTimeoutIds_.add(timeoutId);\n    return timeoutId;\n  }\n  /**\n   * Clears a timeout that gets created via `window.setTimeout` or\n   * {@link Component#setTimeout}. If you set a timeout via {@link Component#setTimeout}\n   * use this function instead of `window.clearTimout`. If you don't your dispose\n   * listener will not get cleaned up until {@link Component#dispose}!\n   *\n   * @param {number} timeoutId\n   *        The id of the timeout to clear. The return value of\n   *        {@link Component#setTimeout} or `window.setTimeout`.\n   *\n   * @return {number}\n   *         Returns the timeout id that was cleared.\n   *\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/clearTimeout}\n   */\n  ;\n\n  _proto.clearTimeout = function clearTimeout(timeoutId) {\n    if (this.setTimeoutIds_.has(timeoutId)) {\n      this.setTimeoutIds_[\"delete\"](timeoutId);\n      window$1.clearTimeout(timeoutId);\n    }\n\n    return timeoutId;\n  }\n  /**\n   * Creates a function that gets run every `x` milliseconds. This function is a wrapper\n   * around `window.setInterval`. There are a few reasons to use this one instead though.\n   * 1. It gets cleared via  {@link Component#clearInterval} when\n   *    {@link Component#dispose} gets called.\n   * 2. The function callback will be a {@link Component~GenericCallback}\n   *\n   * @param {Component~GenericCallback} fn\n   *        The function to run every `x` seconds.\n   *\n   * @param {number} interval\n   *        Execute the specified function every `x` milliseconds.\n   *\n   * @return {number}\n   *         Returns an id that can be used to identify the interval. It can also be be used in\n   *         {@link Component#clearInterval} to clear the interval.\n   *\n   * @listens Component#dispose\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/setInterval}\n   */\n  ;\n\n  _proto.setInterval = function setInterval(fn, interval) {\n    fn = bind(this, fn);\n    this.clearTimersOnDispose_();\n    var intervalId = window$1.setInterval(fn, interval);\n    this.setIntervalIds_.add(intervalId);\n    return intervalId;\n  }\n  /**\n   * Clears an interval that gets created via `window.setInterval` or\n   * {@link Component#setInterval}. If you set an inteval via {@link Component#setInterval}\n   * use this function instead of `window.clearInterval`. If you don't your dispose\n   * listener will not get cleaned up until {@link Component#dispose}!\n   *\n   * @param {number} intervalId\n   *        The id of the interval to clear. The return value of\n   *        {@link Component#setInterval} or `window.setInterval`.\n   *\n   * @return {number}\n   *         Returns the interval id that was cleared.\n   *\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/clearInterval}\n   */\n  ;\n\n  _proto.clearInterval = function clearInterval(intervalId) {\n    if (this.setIntervalIds_.has(intervalId)) {\n      this.setIntervalIds_[\"delete\"](intervalId);\n      window$1.clearInterval(intervalId);\n    }\n\n    return intervalId;\n  }\n  /**\n   * Queues up a callback to be passed to requestAnimationFrame (rAF), but\n   * with a few extra bonuses:\n   *\n   * - Supports browsers that do not support rAF by falling back to\n   *   {@link Component#setTimeout}.\n   *\n   * - The callback is turned into a {@link Component~GenericCallback} (i.e.\n   *   bound to the component).\n   *\n   * - Automatic cancellation of the rAF callback is handled if the component\n   *   is disposed before it is called.\n   *\n   * @param  {Component~GenericCallback} fn\n   *         A function that will be bound to this component and executed just\n   *         before the browser's next repaint.\n   *\n   * @return {number}\n   *         Returns an rAF ID that gets used to identify the timeout. It can\n   *         also be used in {@link Component#cancelAnimationFrame} to cancel\n   *         the animation frame callback.\n   *\n   * @listens Component#dispose\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/window/requestAnimationFrame}\n   */\n  ;\n\n  _proto.requestAnimationFrame = function requestAnimationFrame(fn) {\n    var _this3 = this;\n\n    // Fall back to using a timer.\n    if (!this.supportsRaf_) {\n      return this.setTimeout(fn, 1000 / 60);\n    }\n\n    this.clearTimersOnDispose_(); // declare as variables so they are properly available in rAF function\n    // eslint-disable-next-line\n\n    var id;\n    fn = bind(this, fn);\n    id = window$1.requestAnimationFrame(function () {\n      if (_this3.rafIds_.has(id)) {\n        _this3.rafIds_[\"delete\"](id);\n      }\n\n      fn();\n    });\n    this.rafIds_.add(id);\n    return id;\n  }\n  /**\n   * Request an animation frame, but only one named animation\n   * frame will be queued. Another will never be added until\n   * the previous one finishes.\n   *\n   * @param {string} name\n   *        The name to give this requestAnimationFrame\n   *\n   * @param  {Component~GenericCallback} fn\n   *         A function that will be bound to this component and executed just\n   *         before the browser's next repaint.\n   */\n  ;\n\n  _proto.requestNamedAnimationFrame = function requestNamedAnimationFrame(name, fn) {\n    var _this4 = this;\n\n    if (this.namedRafs_.has(name)) {\n      return;\n    }\n\n    this.clearTimersOnDispose_();\n    fn = bind(this, fn);\n    var id = this.requestAnimationFrame(function () {\n      fn();\n\n      if (_this4.namedRafs_.has(name)) {\n        _this4.namedRafs_[\"delete\"](name);\n      }\n    });\n    this.namedRafs_.set(name, id);\n    return name;\n  }\n  /**\n   * Cancels a current named animation frame if it exists.\n   *\n   * @param {string} name\n   *        The name of the requestAnimationFrame to cancel.\n   */\n  ;\n\n  _proto.cancelNamedAnimationFrame = function cancelNamedAnimationFrame(name) {\n    if (!this.namedRafs_.has(name)) {\n      return;\n    }\n\n    this.cancelAnimationFrame(this.namedRafs_.get(name));\n    this.namedRafs_[\"delete\"](name);\n  }\n  /**\n   * Cancels a queued callback passed to {@link Component#requestAnimationFrame}\n   * (rAF).\n   *\n   * If you queue an rAF callback via {@link Component#requestAnimationFrame},\n   * use this function instead of `window.cancelAnimationFrame`. If you don't,\n   * your dispose listener will not get cleaned up until {@link Component#dispose}!\n   *\n   * @param {number} id\n   *        The rAF ID to clear. The return value of {@link Component#requestAnimationFrame}.\n   *\n   * @return {number}\n   *         Returns the rAF ID that was cleared.\n   *\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/window/cancelAnimationFrame}\n   */\n  ;\n\n  _proto.cancelAnimationFrame = function cancelAnimationFrame(id) {\n    // Fall back to using a timer.\n    if (!this.supportsRaf_) {\n      return this.clearTimeout(id);\n    }\n\n    if (this.rafIds_.has(id)) {\n      this.rafIds_[\"delete\"](id);\n      window$1.cancelAnimationFrame(id);\n    }\n\n    return id;\n  }\n  /**\n   * A function to setup `requestAnimationFrame`, `setTimeout`,\n   * and `setInterval`, clearing on dispose.\n   *\n   * > Previously each timer added and removed dispose listeners on it's own.\n   * For better performance it was decided to batch them all, and use `Set`s\n   * to track outstanding timer ids.\n   *\n   * @private\n   */\n  ;\n\n  _proto.clearTimersOnDispose_ = function clearTimersOnDispose_() {\n    var _this5 = this;\n\n    if (this.clearingTimersOnDispose_) {\n      return;\n    }\n\n    this.clearingTimersOnDispose_ = true;\n    this.one('dispose', function () {\n      [['namedRafs_', 'cancelNamedAnimationFrame'], ['rafIds_', 'cancelAnimationFrame'], ['setTimeoutIds_', 'clearTimeout'], ['setIntervalIds_', 'clearInterval']].forEach(function (_ref) {\n        var idName = _ref[0],\n            cancelName = _ref[1];\n\n        // for a `Set` key will actually be the value again\n        // so forEach((val, val) =>` but for maps we want to use\n        // the key.\n        _this5[idName].forEach(function (val, key) {\n          return _this5[cancelName](key);\n        });\n      });\n      _this5.clearingTimersOnDispose_ = false;\n    });\n  }\n  /**\n   * Register a `Component` with `videojs` given the name and the component.\n   *\n   * > NOTE: {@link Tech}s should not be registered as a `Component`. {@link Tech}s\n   *         should be registered using {@link Tech.registerTech} or\n   *         {@link videojs:videojs.registerTech}.\n   *\n   * > NOTE: This function can also be seen on videojs as\n   *         {@link videojs:videojs.registerComponent}.\n   *\n   * @param {string} name\n   *        The name of the `Component` to register.\n   *\n   * @param {Component} ComponentToRegister\n   *        The `Component` class to register.\n   *\n   * @return {Component}\n   *         The `Component` that was registered.\n   */\n  ;\n\n  Component.registerComponent = function registerComponent(name, ComponentToRegister) {\n    if (typeof name !== 'string' || !name) {\n      throw new Error(\"Illegal component name, \\\"\" + name + \"\\\"; must be a non-empty string.\");\n    }\n\n    var Tech = Component.getComponent('Tech'); // We need to make sure this check is only done if Tech has been registered.\n\n    var isTech = Tech && Tech.isTech(ComponentToRegister);\n    var isComp = Component === ComponentToRegister || Component.prototype.isPrototypeOf(ComponentToRegister.prototype);\n\n    if (isTech || !isComp) {\n      var reason;\n\n      if (isTech) {\n        reason = 'techs must be registered using Tech.registerTech()';\n      } else {\n        reason = 'must be a Component subclass';\n      }\n\n      throw new Error(\"Illegal component, \\\"\" + name + \"\\\"; \" + reason + \".\");\n    }\n\n    name = toTitleCase$1(name);\n\n    if (!Component.components_) {\n      Component.components_ = {};\n    }\n\n    var Player = Component.getComponent('Player');\n\n    if (name === 'Player' && Player && Player.players) {\n      var players = Player.players;\n      var playerNames = Object.keys(players); // If we have players that were disposed, then their name will still be\n      // in Players.players. So, we must loop through and verify that the value\n      // for each item is not null. This allows registration of the Player component\n      // after all players have been disposed or before any were created.\n\n      if (players && playerNames.length > 0 && playerNames.map(function (pname) {\n        return players[pname];\n      }).every(Boolean)) {\n        throw new Error('Can not register Player component after player has been created.');\n      }\n    }\n\n    Component.components_[name] = ComponentToRegister;\n    Component.components_[toLowerCase(name)] = ComponentToRegister;\n    return ComponentToRegister;\n  }\n  /**\n   * Get a `Component` based on the name it was registered with.\n   *\n   * @param {string} name\n   *        The Name of the component to get.\n   *\n   * @return {Component}\n   *         The `Component` that got registered under the given name.\n   */\n  ;\n\n  Component.getComponent = function getComponent(name) {\n    if (!name || !Component.components_) {\n      return;\n    }\n\n    return Component.components_[name];\n  };\n\n  return Component;\n}();\n/**\n * Whether or not this component supports `requestAnimationFrame`.\n *\n * This is exposed primarily for testing purposes.\n *\n * @private\n * @type {Boolean}\n */\n\n\nComponent$1.prototype.supportsRaf_ = typeof window$1.requestAnimationFrame === 'function' && typeof window$1.cancelAnimationFrame === 'function';\nComponent$1.registerComponent('Component', Component$1);\n\n/**\n * @file time-ranges.js\n * @module time-ranges\n */\n/**\n * Returns the time for the specified index at the start or end\n * of a TimeRange object.\n *\n * @typedef    {Function} TimeRangeIndex\n *\n * @param      {number} [index=0]\n *             The range number to return the time for.\n *\n * @return     {number}\n *             The time offset at the specified index.\n *\n * @deprecated The index argument must be provided.\n *             In the future, leaving it out will throw an error.\n */\n\n/**\n * An object that contains ranges of time.\n *\n * @typedef  {Object} TimeRange\n *\n * @property {number} length\n *           The number of time ranges represented by this object.\n *\n * @property {module:time-ranges~TimeRangeIndex} start\n *           Returns the time offset at which a specified time range begins.\n *\n * @property {module:time-ranges~TimeRangeIndex} end\n *           Returns the time offset at which a specified time range ends.\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/API/TimeRanges\n */\n\n/**\n * Check if any of the time ranges are over the maximum index.\n *\n * @private\n * @param   {string} fnName\n *          The function name to use for logging\n *\n * @param   {number} index\n *          The index to check\n *\n * @param   {number} maxIndex\n *          The maximum possible index\n *\n * @throws  {Error} if the timeRanges provided are over the maxIndex\n */\n\nfunction rangeCheck(fnName, index, maxIndex) {\n  if (typeof index !== 'number' || index < 0 || index > maxIndex) {\n    throw new Error(\"Failed to execute '\" + fnName + \"' on 'TimeRanges': The index provided (\" + index + \") is non-numeric or out of bounds (0-\" + maxIndex + \").\");\n  }\n}\n/**\n * Get the time for the specified index at the start or end\n * of a TimeRange object.\n *\n * @private\n * @param      {string} fnName\n *             The function name to use for logging\n *\n * @param      {string} valueIndex\n *             The property that should be used to get the time. should be\n *             'start' or 'end'\n *\n * @param      {Array} ranges\n *             An array of time ranges\n *\n * @param      {Array} [rangeIndex=0]\n *             The index to start the search at\n *\n * @return     {number}\n *             The time that offset at the specified index.\n *\n * @deprecated rangeIndex must be set to a value, in the future this will throw an error.\n * @throws     {Error} if rangeIndex is more than the length of ranges\n */\n\n\nfunction getRange(fnName, valueIndex, ranges, rangeIndex) {\n  rangeCheck(fnName, rangeIndex, ranges.length - 1);\n  return ranges[rangeIndex][valueIndex];\n}\n/**\n * Create a time range object given ranges of time.\n *\n * @private\n * @param   {Array} [ranges]\n *          An array of time ranges.\n */\n\n\nfunction createTimeRangesObj(ranges) {\n  var timeRangesObj;\n\n  if (ranges === undefined || ranges.length === 0) {\n    timeRangesObj = {\n      length: 0,\n      start: function start() {\n        throw new Error('This TimeRanges object is empty');\n      },\n      end: function end() {\n        throw new Error('This TimeRanges object is empty');\n      }\n    };\n  } else {\n    timeRangesObj = {\n      length: ranges.length,\n      start: getRange.bind(null, 'start', 0, ranges),\n      end: getRange.bind(null, 'end', 1, ranges)\n    };\n  }\n\n  if (window$1.Symbol && window$1.Symbol.iterator) {\n    timeRangesObj[window$1.Symbol.iterator] = function () {\n      return (ranges || []).values();\n    };\n  }\n\n  return timeRangesObj;\n}\n/**\n * Create a `TimeRange` object which mimics an\n * {@link https://developer.mozilla.org/en-US/docs/Web/API/TimeRanges|HTML5 TimeRanges instance}.\n *\n * @param {number|Array[]} start\n *        The start of a single range (a number) or an array of ranges (an\n *        array of arrays of two numbers each).\n *\n * @param {number} end\n *        The end of a single range. Cannot be used with the array form of\n *        the `start` argument.\n */\n\n\nfunction createTimeRanges(start, end) {\n  if (Array.isArray(start)) {\n    return createTimeRangesObj(start);\n  } else if (start === undefined || end === undefined) {\n    return createTimeRangesObj();\n  }\n\n  return createTimeRangesObj([[start, end]]);\n}\n\n/**\n * @file buffer.js\n * @module buffer\n */\n/**\n * Compute the percentage of the media that has been buffered.\n *\n * @param {TimeRange} buffered\n *        The current `TimeRange` object representing buffered time ranges\n *\n * @param {number} duration\n *        Total duration of the media\n *\n * @return {number}\n *         Percent buffered of the total duration in decimal form.\n */\n\nfunction bufferedPercent(buffered, duration) {\n  var bufferedDuration = 0;\n  var start;\n  var end;\n\n  if (!duration) {\n    return 0;\n  }\n\n  if (!buffered || !buffered.length) {\n    buffered = createTimeRanges(0, 0);\n  }\n\n  for (var i = 0; i < buffered.length; i++) {\n    start = buffered.start(i);\n    end = buffered.end(i); // buffered end can be bigger than duration by a very small fraction\n\n    if (end > duration) {\n      end = duration;\n    }\n\n    bufferedDuration += end - start;\n  }\n\n  return bufferedDuration / duration;\n}\n\n/**\n * @file media-error.js\n */\n/**\n * A Custom `MediaError` class which mimics the standard HTML5 `MediaError` class.\n *\n * @param {number|string|Object|MediaError} value\n *        This can be of multiple types:\n *        - number: should be a standard error code\n *        - string: an error message (the code will be 0)\n *        - Object: arbitrary properties\n *        - `MediaError` (native): used to populate a video.js `MediaError` object\n *        - `MediaError` (video.js): will return itself if it's already a\n *          video.js `MediaError` object.\n *\n * @see [MediaError Spec]{@link https://dev.w3.org/html5/spec-author-view/video.html#mediaerror}\n * @see [Encrypted MediaError Spec]{@link https://www.w3.org/TR/2013/WD-encrypted-media-20130510/#error-codes}\n *\n * @class MediaError\n */\n\nfunction MediaError(value) {\n  // Allow redundant calls to this constructor to avoid having `instanceof`\n  // checks peppered around the code.\n  if (value instanceof MediaError) {\n    return value;\n  }\n\n  if (typeof value === 'number') {\n    this.code = value;\n  } else if (typeof value === 'string') {\n    // default code is zero, so this is a custom error\n    this.message = value;\n  } else if (isObject(value)) {\n    // We assign the `code` property manually because native `MediaError` objects\n    // do not expose it as an own/enumerable property of the object.\n    if (typeof value.code === 'number') {\n      this.code = value.code;\n    }\n\n    assign(this, value);\n  }\n\n  if (!this.message) {\n    this.message = MediaError.defaultMessages[this.code] || '';\n  }\n}\n/**\n * The error code that refers two one of the defined `MediaError` types\n *\n * @type {Number}\n */\n\n\nMediaError.prototype.code = 0;\n/**\n * An optional message that to show with the error. Message is not part of the HTML5\n * video spec but allows for more informative custom errors.\n *\n * @type {String}\n */\n\nMediaError.prototype.message = '';\n/**\n * An optional status code that can be set by plugins to allow even more detail about\n * the error. For example a plugin might provide a specific HTTP status code and an\n * error message for that code. Then when the plugin gets that error this class will\n * know how to display an error message for it. This allows a custom message to show\n * up on the `Player` error overlay.\n *\n * @type {Array}\n */\n\nMediaError.prototype.status = null;\n/**\n * Errors indexed by the W3C standard. The order **CANNOT CHANGE**! See the\n * specification listed under {@link MediaError} for more information.\n *\n * @enum {array}\n * @readonly\n * @property {string} 0 - MEDIA_ERR_CUSTOM\n * @property {string} 1 - MEDIA_ERR_ABORTED\n * @property {string} 2 - MEDIA_ERR_NETWORK\n * @property {string} 3 - MEDIA_ERR_DECODE\n * @property {string} 4 - MEDIA_ERR_SRC_NOT_SUPPORTED\n * @property {string} 5 - MEDIA_ERR_ENCRYPTED\n */\n\nMediaError.errorTypes = ['MEDIA_ERR_CUSTOM', 'MEDIA_ERR_ABORTED', 'MEDIA_ERR_NETWORK', 'MEDIA_ERR_DECODE', 'MEDIA_ERR_SRC_NOT_SUPPORTED', 'MEDIA_ERR_ENCRYPTED'];\n/**\n * The default `MediaError` messages based on the {@link MediaError.errorTypes}.\n *\n * @type {Array}\n * @constant\n */\n\nMediaError.defaultMessages = {\n  1: 'You aborted the media playback',\n  2: 'A network error caused the media download to fail part-way.',\n  3: 'The media playback was aborted due to a corruption problem or because the media used features your browser did not support.',\n  4: 'The media could not be loaded, either because the server or network failed or because the format is not supported.',\n  5: 'The media is encrypted and we do not have the keys to decrypt it.'\n}; // Add types as properties on MediaError\n// e.g. MediaError.MEDIA_ERR_SRC_NOT_SUPPORTED = 4;\n\nfor (var errNum = 0; errNum < MediaError.errorTypes.length; errNum++) {\n  MediaError[MediaError.errorTypes[errNum]] = errNum; // values should be accessible on both the class and instance\n\n  MediaError.prototype[MediaError.errorTypes[errNum]] = errNum;\n} // jsdocs for instance/static members added above\n\n/**\n * Returns whether an object is `Promise`-like (i.e. has a `then` method).\n *\n * @param  {Object}  value\n *         An object that may or may not be `Promise`-like.\n *\n * @return {boolean}\n *         Whether or not the object is `Promise`-like.\n */\nfunction isPromise(value) {\n  return value !== undefined && value !== null && typeof value.then === 'function';\n}\n/**\n * Silence a Promise-like object.\n *\n * This is useful for avoiding non-harmful, but potentially confusing \"uncaught\n * play promise\" rejection error messages.\n *\n * @param  {Object} value\n *         An object that may or may not be `Promise`-like.\n */\n\nfunction silencePromise(value) {\n  if (isPromise(value)) {\n    value.then(null, function (e) {});\n  }\n}\n\n/**\n * @file text-track-list-converter.js Utilities for capturing text track state and\n * re-creating tracks based on a capture.\n *\n * @module text-track-list-converter\n */\n\n/**\n * Examine a single {@link TextTrack} and return a JSON-compatible javascript object that\n * represents the {@link TextTrack}'s state.\n *\n * @param {TextTrack} track\n *        The text track to query.\n *\n * @return {Object}\n *         A serializable javascript representation of the TextTrack.\n * @private\n */\nvar trackToJson_ = function trackToJson_(track) {\n  var ret = ['kind', 'label', 'language', 'id', 'inBandMetadataTrackDispatchType', 'mode', 'src'].reduce(function (acc, prop, i) {\n    if (track[prop]) {\n      acc[prop] = track[prop];\n    }\n\n    return acc;\n  }, {\n    cues: track.cues && Array.prototype.map.call(track.cues, function (cue) {\n      return {\n        startTime: cue.startTime,\n        endTime: cue.endTime,\n        text: cue.text,\n        id: cue.id\n      };\n    })\n  });\n  return ret;\n};\n/**\n * Examine a {@link Tech} and return a JSON-compatible javascript array that represents the\n * state of all {@link TextTrack}s currently configured. The return array is compatible with\n * {@link text-track-list-converter:jsonToTextTracks}.\n *\n * @param {Tech} tech\n *        The tech object to query\n *\n * @return {Array}\n *         A serializable javascript representation of the {@link Tech}s\n *         {@link TextTrackList}.\n */\n\n\nvar textTracksToJson = function textTracksToJson(tech) {\n  var trackEls = tech.$$('track');\n  var trackObjs = Array.prototype.map.call(trackEls, function (t) {\n    return t.track;\n  });\n  var tracks = Array.prototype.map.call(trackEls, function (trackEl) {\n    var json = trackToJson_(trackEl.track);\n\n    if (trackEl.src) {\n      json.src = trackEl.src;\n    }\n\n    return json;\n  });\n  return tracks.concat(Array.prototype.filter.call(tech.textTracks(), function (track) {\n    return trackObjs.indexOf(track) === -1;\n  }).map(trackToJson_));\n};\n/**\n * Create a set of remote {@link TextTrack}s on a {@link Tech} based on an array of javascript\n * object {@link TextTrack} representations.\n *\n * @param {Array} json\n *        An array of `TextTrack` representation objects, like those that would be\n *        produced by `textTracksToJson`.\n *\n * @param {Tech} tech\n *        The `Tech` to create the `TextTrack`s on.\n */\n\n\nvar jsonToTextTracks = function jsonToTextTracks(json, tech) {\n  json.forEach(function (track) {\n    var addedTrack = tech.addRemoteTextTrack(track).track;\n\n    if (!track.src && track.cues) {\n      track.cues.forEach(function (cue) {\n        return addedTrack.addCue(cue);\n      });\n    }\n  });\n  return tech.textTracks();\n};\n\nvar textTrackConverter = {\n  textTracksToJson: textTracksToJson,\n  jsonToTextTracks: jsonToTextTracks,\n  trackToJson_: trackToJson_\n};\n\nvar MODAL_CLASS_NAME = 'vjs-modal-dialog';\n/**\n * The `ModalDialog` displays over the video and its controls, which blocks\n * interaction with the player until it is closed.\n *\n * Modal dialogs include a \"Close\" button and will close when that button\n * is activated - or when ESC is pressed anywhere.\n *\n * @extends Component\n */\n\nvar ModalDialog = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(ModalDialog, _Component);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Mixed} [options.content=undefined]\n   *        Provide customized content for this modal.\n   *\n   * @param {string} [options.description]\n   *        A text description for the modal, primarily for accessibility.\n   *\n   * @param {boolean} [options.fillAlways=false]\n   *        Normally, modals are automatically filled only the first time\n   *        they open. This tells the modal to refresh its content\n   *        every time it opens.\n   *\n   * @param {string} [options.label]\n   *        A text label for the modal, primarily for accessibility.\n   *\n   * @param {boolean} [options.pauseOnOpen=true]\n   *        If `true`, playback will will be paused if playing when\n   *        the modal opens, and resumed when it closes.\n   *\n   * @param {boolean} [options.temporary=true]\n   *        If `true`, the modal can only be opened once; it will be\n   *        disposed as soon as it's closed.\n   *\n   * @param {boolean} [options.uncloseable=false]\n   *        If `true`, the user will not be able to close the modal\n   *        through the UI in the normal ways. Programmatic closing is\n   *        still possible.\n   */\n  function ModalDialog(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n\n    _this.handleKeyDown_ = function (e) {\n      return _this.handleKeyDown(e);\n    };\n\n    _this.close_ = function (e) {\n      return _this.close(e);\n    };\n\n    _this.opened_ = _this.hasBeenOpened_ = _this.hasBeenFilled_ = false;\n\n    _this.closeable(!_this.options_.uncloseable);\n\n    _this.content(_this.options_.content); // Make sure the contentEl is defined AFTER any children are initialized\n    // because we only want the contents of the modal in the contentEl\n    // (not the UI elements like the close button).\n\n\n    _this.contentEl_ = createEl('div', {\n      className: MODAL_CLASS_NAME + \"-content\"\n    }, {\n      role: 'document'\n    });\n    _this.descEl_ = createEl('p', {\n      className: MODAL_CLASS_NAME + \"-description vjs-control-text\",\n      id: _this.el().getAttribute('aria-describedby')\n    });\n    textContent(_this.descEl_, _this.description());\n\n    _this.el_.appendChild(_this.descEl_);\n\n    _this.el_.appendChild(_this.contentEl_);\n\n    return _this;\n  }\n  /**\n   * Create the `ModalDialog`'s DOM element\n   *\n   * @return {Element}\n   *         The DOM element that gets created.\n   */\n\n\n  var _proto = ModalDialog.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: this.buildCSSClass(),\n      tabIndex: -1\n    }, {\n      'aria-describedby': this.id() + \"_description\",\n      'aria-hidden': 'true',\n      'aria-label': this.label(),\n      'role': 'dialog'\n    });\n  };\n\n  _proto.dispose = function dispose() {\n    this.contentEl_ = null;\n    this.descEl_ = null;\n    this.previouslyActiveEl_ = null;\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n  ;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return MODAL_CLASS_NAME + \" vjs-hidden \" + _Component.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Returns the label string for this modal. Primarily used for accessibility.\n   *\n   * @return {string}\n   *         the localized or raw label of this modal.\n   */\n  ;\n\n  _proto.label = function label() {\n    return this.localize(this.options_.label || 'Modal Window');\n  }\n  /**\n   * Returns the description string for this modal. Primarily used for\n   * accessibility.\n   *\n   * @return {string}\n   *         The localized or raw description of this modal.\n   */\n  ;\n\n  _proto.description = function description() {\n    var desc = this.options_.description || this.localize('This is a modal window.'); // Append a universal closeability message if the modal is closeable.\n\n    if (this.closeable()) {\n      desc += ' ' + this.localize('This modal can be closed by pressing the Escape key or activating the close button.');\n    }\n\n    return desc;\n  }\n  /**\n   * Opens the modal.\n   *\n   * @fires ModalDialog#beforemodalopen\n   * @fires ModalDialog#modalopen\n   */\n  ;\n\n  _proto.open = function open() {\n    if (!this.opened_) {\n      var player = this.player();\n      /**\n        * Fired just before a `ModalDialog` is opened.\n        *\n        * @event ModalDialog#beforemodalopen\n        * @type {EventTarget~Event}\n        */\n\n      this.trigger('beforemodalopen');\n      this.opened_ = true; // Fill content if the modal has never opened before and\n      // never been filled.\n\n      if (this.options_.fillAlways || !this.hasBeenOpened_ && !this.hasBeenFilled_) {\n        this.fill();\n      } // If the player was playing, pause it and take note of its previously\n      // playing state.\n\n\n      this.wasPlaying_ = !player.paused();\n\n      if (this.options_.pauseOnOpen && this.wasPlaying_) {\n        player.pause();\n      }\n\n      this.on('keydown', this.handleKeyDown_); // Hide controls and note if they were enabled.\n\n      this.hadControls_ = player.controls();\n      player.controls(false);\n      this.show();\n      this.conditionalFocus_();\n      this.el().setAttribute('aria-hidden', 'false');\n      /**\n        * Fired just after a `ModalDialog` is opened.\n        *\n        * @event ModalDialog#modalopen\n        * @type {EventTarget~Event}\n        */\n\n      this.trigger('modalopen');\n      this.hasBeenOpened_ = true;\n    }\n  }\n  /**\n   * If the `ModalDialog` is currently open or closed.\n   *\n   * @param  {boolean} [value]\n   *         If given, it will open (`true`) or close (`false`) the modal.\n   *\n   * @return {boolean}\n   *         the current open state of the modaldialog\n   */\n  ;\n\n  _proto.opened = function opened(value) {\n    if (typeof value === 'boolean') {\n      this[value ? 'open' : 'close']();\n    }\n\n    return this.opened_;\n  }\n  /**\n   * Closes the modal, does nothing if the `ModalDialog` is\n   * not open.\n   *\n   * @fires ModalDialog#beforemodalclose\n   * @fires ModalDialog#modalclose\n   */\n  ;\n\n  _proto.close = function close() {\n    if (!this.opened_) {\n      return;\n    }\n\n    var player = this.player();\n    /**\n      * Fired just before a `ModalDialog` is closed.\n      *\n      * @event ModalDialog#beforemodalclose\n      * @type {EventTarget~Event}\n      */\n\n    this.trigger('beforemodalclose');\n    this.opened_ = false;\n\n    if (this.wasPlaying_ && this.options_.pauseOnOpen) {\n      player.play();\n    }\n\n    this.off('keydown', this.handleKeyDown_);\n\n    if (this.hadControls_) {\n      player.controls(true);\n    }\n\n    this.hide();\n    this.el().setAttribute('aria-hidden', 'true');\n    /**\n      * Fired just after a `ModalDialog` is closed.\n      *\n      * @event ModalDialog#modalclose\n      * @type {EventTarget~Event}\n      */\n\n    this.trigger('modalclose');\n    this.conditionalBlur_();\n\n    if (this.options_.temporary) {\n      this.dispose();\n    }\n  }\n  /**\n   * Check to see if the `ModalDialog` is closeable via the UI.\n   *\n   * @param  {boolean} [value]\n   *         If given as a boolean, it will set the `closeable` option.\n   *\n   * @return {boolean}\n   *         Returns the final value of the closable option.\n   */\n  ;\n\n  _proto.closeable = function closeable(value) {\n    if (typeof value === 'boolean') {\n      var closeable = this.closeable_ = !!value;\n      var close = this.getChild('closeButton'); // If this is being made closeable and has no close button, add one.\n\n      if (closeable && !close) {\n        // The close button should be a child of the modal - not its\n        // content element, so temporarily change the content element.\n        var temp = this.contentEl_;\n        this.contentEl_ = this.el_;\n        close = this.addChild('closeButton', {\n          controlText: 'Close Modal Dialog'\n        });\n        this.contentEl_ = temp;\n        this.on(close, 'close', this.close_);\n      } // If this is being made uncloseable and has a close button, remove it.\n\n\n      if (!closeable && close) {\n        this.off(close, 'close', this.close_);\n        this.removeChild(close);\n        close.dispose();\n      }\n    }\n\n    return this.closeable_;\n  }\n  /**\n   * Fill the modal's content element with the modal's \"content\" option.\n   * The content element will be emptied before this change takes place.\n   */\n  ;\n\n  _proto.fill = function fill() {\n    this.fillWith(this.content());\n  }\n  /**\n   * Fill the modal's content element with arbitrary content.\n   * The content element will be emptied before this change takes place.\n   *\n   * @fires ModalDialog#beforemodalfill\n   * @fires ModalDialog#modalfill\n   *\n   * @param {Mixed} [content]\n   *        The same rules apply to this as apply to the `content` option.\n   */\n  ;\n\n  _proto.fillWith = function fillWith(content) {\n    var contentEl = this.contentEl();\n    var parentEl = contentEl.parentNode;\n    var nextSiblingEl = contentEl.nextSibling;\n    /**\n      * Fired just before a `ModalDialog` is filled with content.\n      *\n      * @event ModalDialog#beforemodalfill\n      * @type {EventTarget~Event}\n      */\n\n    this.trigger('beforemodalfill');\n    this.hasBeenFilled_ = true; // Detach the content element from the DOM before performing\n    // manipulation to avoid modifying the live DOM multiple times.\n\n    parentEl.removeChild(contentEl);\n    this.empty();\n    insertContent(contentEl, content);\n    /**\n     * Fired just after a `ModalDialog` is filled with content.\n     *\n     * @event ModalDialog#modalfill\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('modalfill'); // Re-inject the re-filled content element.\n\n    if (nextSiblingEl) {\n      parentEl.insertBefore(contentEl, nextSiblingEl);\n    } else {\n      parentEl.appendChild(contentEl);\n    } // make sure that the close button is last in the dialog DOM\n\n\n    var closeButton = this.getChild('closeButton');\n\n    if (closeButton) {\n      parentEl.appendChild(closeButton.el_);\n    }\n  }\n  /**\n   * Empties the content element. This happens anytime the modal is filled.\n   *\n   * @fires ModalDialog#beforemodalempty\n   * @fires ModalDialog#modalempty\n   */\n  ;\n\n  _proto.empty = function empty() {\n    /**\n    * Fired just before a `ModalDialog` is emptied.\n    *\n    * @event ModalDialog#beforemodalempty\n    * @type {EventTarget~Event}\n    */\n    this.trigger('beforemodalempty');\n    emptyEl(this.contentEl());\n    /**\n    * Fired just after a `ModalDialog` is emptied.\n    *\n    * @event ModalDialog#modalempty\n    * @type {EventTarget~Event}\n    */\n\n    this.trigger('modalempty');\n  }\n  /**\n   * Gets or sets the modal content, which gets normalized before being\n   * rendered into the DOM.\n   *\n   * This does not update the DOM or fill the modal, but it is called during\n   * that process.\n   *\n   * @param  {Mixed} [value]\n   *         If defined, sets the internal content value to be used on the\n   *         next call(s) to `fill`. This value is normalized before being\n   *         inserted. To \"clear\" the internal content value, pass `null`.\n   *\n   * @return {Mixed}\n   *         The current content of the modal dialog\n   */\n  ;\n\n  _proto.content = function content(value) {\n    if (typeof value !== 'undefined') {\n      this.content_ = value;\n    }\n\n    return this.content_;\n  }\n  /**\n   * conditionally focus the modal dialog if focus was previously on the player.\n   *\n   * @private\n   */\n  ;\n\n  _proto.conditionalFocus_ = function conditionalFocus_() {\n    var activeEl = document.activeElement;\n    var playerEl = this.player_.el_;\n    this.previouslyActiveEl_ = null;\n\n    if (playerEl.contains(activeEl) || playerEl === activeEl) {\n      this.previouslyActiveEl_ = activeEl;\n      this.focus();\n    }\n  }\n  /**\n   * conditionally blur the element and refocus the last focused element\n   *\n   * @private\n   */\n  ;\n\n  _proto.conditionalBlur_ = function conditionalBlur_() {\n    if (this.previouslyActiveEl_) {\n      this.previouslyActiveEl_.focus();\n      this.previouslyActiveEl_ = null;\n    }\n  }\n  /**\n   * Keydown handler. Attached when modal is focused.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    // Do not allow keydowns to reach out of the modal dialog.\n    event.stopPropagation();\n\n    if (keycode.isEventKey(event, 'Escape') && this.closeable()) {\n      event.preventDefault();\n      this.close();\n      return;\n    } // exit early if it isn't a tab key\n\n\n    if (!keycode.isEventKey(event, 'Tab')) {\n      return;\n    }\n\n    var focusableEls = this.focusableEls_();\n    var activeEl = this.el_.querySelector(':focus');\n    var focusIndex;\n\n    for (var i = 0; i < focusableEls.length; i++) {\n      if (activeEl === focusableEls[i]) {\n        focusIndex = i;\n        break;\n      }\n    }\n\n    if (document.activeElement === this.el_) {\n      focusIndex = 0;\n    }\n\n    if (event.shiftKey && focusIndex === 0) {\n      focusableEls[focusableEls.length - 1].focus();\n      event.preventDefault();\n    } else if (!event.shiftKey && focusIndex === focusableEls.length - 1) {\n      focusableEls[0].focus();\n      event.preventDefault();\n    }\n  }\n  /**\n   * get all focusable elements\n   *\n   * @private\n   */\n  ;\n\n  _proto.focusableEls_ = function focusableEls_() {\n    var allChildren = this.el_.querySelectorAll('*');\n    return Array.prototype.filter.call(allChildren, function (child) {\n      return (child instanceof window$1.HTMLAnchorElement || child instanceof window$1.HTMLAreaElement) && child.hasAttribute('href') || (child instanceof window$1.HTMLInputElement || child instanceof window$1.HTMLSelectElement || child instanceof window$1.HTMLTextAreaElement || child instanceof window$1.HTMLButtonElement) && !child.hasAttribute('disabled') || child instanceof window$1.HTMLIFrameElement || child instanceof window$1.HTMLObjectElement || child instanceof window$1.HTMLEmbedElement || child.hasAttribute('tabindex') && child.getAttribute('tabindex') !== -1 || child.hasAttribute('contenteditable');\n    });\n  };\n\n  return ModalDialog;\n}(Component$1);\n/**\n * Default options for `ModalDialog` default options.\n *\n * @type {Object}\n * @private\n */\n\n\nModalDialog.prototype.options_ = {\n  pauseOnOpen: true,\n  temporary: true\n};\nComponent$1.registerComponent('ModalDialog', ModalDialog);\n\n/**\n * Common functionaliy between {@link TextTrackList}, {@link AudioTrackList}, and\n * {@link VideoTrackList}\n *\n * @extends EventTarget\n */\n\nvar TrackList = /*#__PURE__*/function (_EventTarget) {\n  _inheritsLoose(TrackList, _EventTarget);\n\n  /**\n   * Create an instance of this class\n   *\n   * @param {Track[]} tracks\n   *        A list of tracks to initialize the list with.\n   *\n   * @abstract\n   */\n  function TrackList(tracks) {\n    var _this;\n\n    if (tracks === void 0) {\n      tracks = [];\n    }\n\n    _this = _EventTarget.call(this) || this;\n    _this.tracks_ = [];\n    /**\n     * @memberof TrackList\n     * @member {number} length\n     *         The current number of `Track`s in the this Trackist.\n     * @instance\n     */\n\n    Object.defineProperty(_assertThisInitialized(_this), 'length', {\n      get: function get() {\n        return this.tracks_.length;\n      }\n    });\n\n    for (var i = 0; i < tracks.length; i++) {\n      _this.addTrack(tracks[i]);\n    }\n\n    return _this;\n  }\n  /**\n   * Add a {@link Track} to the `TrackList`\n   *\n   * @param {Track} track\n   *        The audio, video, or text track to add to the list.\n   *\n   * @fires TrackList#addtrack\n   */\n\n\n  var _proto = TrackList.prototype;\n\n  _proto.addTrack = function addTrack(track) {\n    var _this2 = this;\n\n    var index = this.tracks_.length;\n\n    if (!('' + index in this)) {\n      Object.defineProperty(this, index, {\n        get: function get() {\n          return this.tracks_[index];\n        }\n      });\n    } // Do not add duplicate tracks\n\n\n    if (this.tracks_.indexOf(track) === -1) {\n      this.tracks_.push(track);\n      /**\n       * Triggered when a track is added to a track list.\n       *\n       * @event TrackList#addtrack\n       * @type {EventTarget~Event}\n       * @property {Track} track\n       *           A reference to track that was added.\n       */\n\n      this.trigger({\n        track: track,\n        type: 'addtrack',\n        target: this\n      });\n    }\n    /**\n     * Triggered when a track label is changed.\n     *\n     * @event TrackList#addtrack\n     * @type {EventTarget~Event}\n     * @property {Track} track\n     *           A reference to track that was added.\n     */\n\n\n    track.labelchange_ = function () {\n      _this2.trigger({\n        track: track,\n        type: 'labelchange',\n        target: _this2\n      });\n    };\n\n    if (isEvented(track)) {\n      track.addEventListener('labelchange', track.labelchange_);\n    }\n  }\n  /**\n   * Remove a {@link Track} from the `TrackList`\n   *\n   * @param {Track} rtrack\n   *        The audio, video, or text track to remove from the list.\n   *\n   * @fires TrackList#removetrack\n   */\n  ;\n\n  _proto.removeTrack = function removeTrack(rtrack) {\n    var track;\n\n    for (var i = 0, l = this.length; i < l; i++) {\n      if (this[i] === rtrack) {\n        track = this[i];\n\n        if (track.off) {\n          track.off();\n        }\n\n        this.tracks_.splice(i, 1);\n        break;\n      }\n    }\n\n    if (!track) {\n      return;\n    }\n    /**\n     * Triggered when a track is removed from track list.\n     *\n     * @event TrackList#removetrack\n     * @type {EventTarget~Event}\n     * @property {Track} track\n     *           A reference to track that was removed.\n     */\n\n\n    this.trigger({\n      track: track,\n      type: 'removetrack',\n      target: this\n    });\n  }\n  /**\n   * Get a Track from the TrackList by a tracks id\n   *\n   * @param {string} id - the id of the track to get\n   * @method getTrackById\n   * @return {Track}\n   * @private\n   */\n  ;\n\n  _proto.getTrackById = function getTrackById(id) {\n    var result = null;\n\n    for (var i = 0, l = this.length; i < l; i++) {\n      var track = this[i];\n\n      if (track.id === id) {\n        result = track;\n        break;\n      }\n    }\n\n    return result;\n  };\n\n  return TrackList;\n}(EventTarget$2);\n/**\n * Triggered when a different track is selected/enabled.\n *\n * @event TrackList#change\n * @type {EventTarget~Event}\n */\n\n/**\n * Events that can be called with on + eventName. See {@link EventHandler}.\n *\n * @property {Object} TrackList#allowedEvents_\n * @private\n */\n\n\nTrackList.prototype.allowedEvents_ = {\n  change: 'change',\n  addtrack: 'addtrack',\n  removetrack: 'removetrack',\n  labelchange: 'labelchange'\n}; // emulate attribute EventHandler support to allow for feature detection\n\nfor (var event in TrackList.prototype.allowedEvents_) {\n  TrackList.prototype['on' + event] = null;\n}\n\n/**\n * Anywhere we call this function we diverge from the spec\n * as we only support one enabled audiotrack at a time\n *\n * @param {AudioTrackList} list\n *        list to work on\n *\n * @param {AudioTrack} track\n *        The track to skip\n *\n * @private\n */\n\nvar disableOthers$1 = function disableOthers(list, track) {\n  for (var i = 0; i < list.length; i++) {\n    if (!Object.keys(list[i]).length || track.id === list[i].id) {\n      continue;\n    } // another audio track is enabled, disable it\n\n\n    list[i].enabled = false;\n  }\n};\n/**\n * The current list of {@link AudioTrack} for a media file.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#audiotracklist}\n * @extends TrackList\n */\n\n\nvar AudioTrackList = /*#__PURE__*/function (_TrackList) {\n  _inheritsLoose(AudioTrackList, _TrackList);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {AudioTrack[]} [tracks=[]]\n   *        A list of `AudioTrack` to instantiate the list with.\n   */\n  function AudioTrackList(tracks) {\n    var _this;\n\n    if (tracks === void 0) {\n      tracks = [];\n    }\n\n    // make sure only 1 track is enabled\n    // sorted from last index to first index\n    for (var i = tracks.length - 1; i >= 0; i--) {\n      if (tracks[i].enabled) {\n        disableOthers$1(tracks, tracks[i]);\n        break;\n      }\n    }\n\n    _this = _TrackList.call(this, tracks) || this;\n    _this.changing_ = false;\n    return _this;\n  }\n  /**\n   * Add an {@link AudioTrack} to the `AudioTrackList`.\n   *\n   * @param {AudioTrack} track\n   *        The AudioTrack to add to the list\n   *\n   * @fires TrackList#addtrack\n   */\n\n\n  var _proto = AudioTrackList.prototype;\n\n  _proto.addTrack = function addTrack(track) {\n    var _this2 = this;\n\n    if (track.enabled) {\n      disableOthers$1(this, track);\n    }\n\n    _TrackList.prototype.addTrack.call(this, track); // native tracks don't have this\n\n\n    if (!track.addEventListener) {\n      return;\n    }\n\n    track.enabledChange_ = function () {\n      // when we are disabling other tracks (since we don't support\n      // more than one track at a time) we will set changing_\n      // to true so that we don't trigger additional change events\n      if (_this2.changing_) {\n        return;\n      }\n\n      _this2.changing_ = true;\n      disableOthers$1(_this2, track);\n      _this2.changing_ = false;\n\n      _this2.trigger('change');\n    };\n    /**\n     * @listens AudioTrack#enabledchange\n     * @fires TrackList#change\n     */\n\n\n    track.addEventListener('enabledchange', track.enabledChange_);\n  };\n\n  _proto.removeTrack = function removeTrack(rtrack) {\n    _TrackList.prototype.removeTrack.call(this, rtrack);\n\n    if (rtrack.removeEventListener && rtrack.enabledChange_) {\n      rtrack.removeEventListener('enabledchange', rtrack.enabledChange_);\n      rtrack.enabledChange_ = null;\n    }\n  };\n\n  return AudioTrackList;\n}(TrackList);\n\n/**\n * Un-select all other {@link VideoTrack}s that are selected.\n *\n * @param {VideoTrackList} list\n *        list to work on\n *\n * @param {VideoTrack} track\n *        The track to skip\n *\n * @private\n */\n\nvar disableOthers = function disableOthers(list, track) {\n  for (var i = 0; i < list.length; i++) {\n    if (!Object.keys(list[i]).length || track.id === list[i].id) {\n      continue;\n    } // another video track is enabled, disable it\n\n\n    list[i].selected = false;\n  }\n};\n/**\n * The current list of {@link VideoTrack} for a video.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#videotracklist}\n * @extends TrackList\n */\n\n\nvar VideoTrackList = /*#__PURE__*/function (_TrackList) {\n  _inheritsLoose(VideoTrackList, _TrackList);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {VideoTrack[]} [tracks=[]]\n   *        A list of `VideoTrack` to instantiate the list with.\n   */\n  function VideoTrackList(tracks) {\n    var _this;\n\n    if (tracks === void 0) {\n      tracks = [];\n    }\n\n    // make sure only 1 track is enabled\n    // sorted from last index to first index\n    for (var i = tracks.length - 1; i >= 0; i--) {\n      if (tracks[i].selected) {\n        disableOthers(tracks, tracks[i]);\n        break;\n      }\n    }\n\n    _this = _TrackList.call(this, tracks) || this;\n    _this.changing_ = false;\n    /**\n     * @member {number} VideoTrackList#selectedIndex\n     *         The current index of the selected {@link VideoTrack`}.\n     */\n\n    Object.defineProperty(_assertThisInitialized(_this), 'selectedIndex', {\n      get: function get() {\n        for (var _i = 0; _i < this.length; _i++) {\n          if (this[_i].selected) {\n            return _i;\n          }\n        }\n\n        return -1;\n      },\n      set: function set() {}\n    });\n    return _this;\n  }\n  /**\n   * Add a {@link VideoTrack} to the `VideoTrackList`.\n   *\n   * @param {VideoTrack} track\n   *        The VideoTrack to add to the list\n   *\n   * @fires TrackList#addtrack\n   */\n\n\n  var _proto = VideoTrackList.prototype;\n\n  _proto.addTrack = function addTrack(track) {\n    var _this2 = this;\n\n    if (track.selected) {\n      disableOthers(this, track);\n    }\n\n    _TrackList.prototype.addTrack.call(this, track); // native tracks don't have this\n\n\n    if (!track.addEventListener) {\n      return;\n    }\n\n    track.selectedChange_ = function () {\n      if (_this2.changing_) {\n        return;\n      }\n\n      _this2.changing_ = true;\n      disableOthers(_this2, track);\n      _this2.changing_ = false;\n\n      _this2.trigger('change');\n    };\n    /**\n     * @listens VideoTrack#selectedchange\n     * @fires TrackList#change\n     */\n\n\n    track.addEventListener('selectedchange', track.selectedChange_);\n  };\n\n  _proto.removeTrack = function removeTrack(rtrack) {\n    _TrackList.prototype.removeTrack.call(this, rtrack);\n\n    if (rtrack.removeEventListener && rtrack.selectedChange_) {\n      rtrack.removeEventListener('selectedchange', rtrack.selectedChange_);\n      rtrack.selectedChange_ = null;\n    }\n  };\n\n  return VideoTrackList;\n}(TrackList);\n\n/**\n * The current list of {@link TextTrack} for a media file.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttracklist}\n * @extends TrackList\n */\n\nvar TextTrackList = /*#__PURE__*/function (_TrackList) {\n  _inheritsLoose(TextTrackList, _TrackList);\n\n  function TextTrackList() {\n    return _TrackList.apply(this, arguments) || this;\n  }\n\n  var _proto = TextTrackList.prototype;\n\n  /**\n   * Add a {@link TextTrack} to the `TextTrackList`\n   *\n   * @param {TextTrack} track\n   *        The text track to add to the list.\n   *\n   * @fires TrackList#addtrack\n   */\n  _proto.addTrack = function addTrack(track) {\n    var _this = this;\n\n    _TrackList.prototype.addTrack.call(this, track);\n\n    if (!this.queueChange_) {\n      this.queueChange_ = function () {\n        return _this.queueTrigger('change');\n      };\n    }\n\n    if (!this.triggerSelectedlanguagechange) {\n      this.triggerSelectedlanguagechange_ = function () {\n        return _this.trigger('selectedlanguagechange');\n      };\n    }\n    /**\n     * @listens TextTrack#modechange\n     * @fires TrackList#change\n     */\n\n\n    track.addEventListener('modechange', this.queueChange_);\n    var nonLanguageTextTrackKind = ['metadata', 'chapters'];\n\n    if (nonLanguageTextTrackKind.indexOf(track.kind) === -1) {\n      track.addEventListener('modechange', this.triggerSelectedlanguagechange_);\n    }\n  };\n\n  _proto.removeTrack = function removeTrack(rtrack) {\n    _TrackList.prototype.removeTrack.call(this, rtrack); // manually remove the event handlers we added\n\n\n    if (rtrack.removeEventListener) {\n      if (this.queueChange_) {\n        rtrack.removeEventListener('modechange', this.queueChange_);\n      }\n\n      if (this.selectedlanguagechange_) {\n        rtrack.removeEventListener('modechange', this.triggerSelectedlanguagechange_);\n      }\n    }\n  };\n\n  return TextTrackList;\n}(TrackList);\n\n/**\n * @file html-track-element-list.js\n */\n\n/**\n * The current list of {@link HtmlTrackElement}s.\n */\nvar HtmlTrackElementList = /*#__PURE__*/function () {\n  /**\n   * Create an instance of this class.\n   *\n   * @param {HtmlTrackElement[]} [tracks=[]]\n   *        A list of `HtmlTrackElement` to instantiate the list with.\n   */\n  function HtmlTrackElementList(trackElements) {\n    if (trackElements === void 0) {\n      trackElements = [];\n    }\n\n    this.trackElements_ = [];\n    /**\n     * @memberof HtmlTrackElementList\n     * @member {number} length\n     *         The current number of `Track`s in the this Trackist.\n     * @instance\n     */\n\n    Object.defineProperty(this, 'length', {\n      get: function get() {\n        return this.trackElements_.length;\n      }\n    });\n\n    for (var i = 0, length = trackElements.length; i < length; i++) {\n      this.addTrackElement_(trackElements[i]);\n    }\n  }\n  /**\n   * Add an {@link HtmlTrackElement} to the `HtmlTrackElementList`\n   *\n   * @param {HtmlTrackElement} trackElement\n   *        The track element to add to the list.\n   *\n   * @private\n   */\n\n\n  var _proto = HtmlTrackElementList.prototype;\n\n  _proto.addTrackElement_ = function addTrackElement_(trackElement) {\n    var index = this.trackElements_.length;\n\n    if (!('' + index in this)) {\n      Object.defineProperty(this, index, {\n        get: function get() {\n          return this.trackElements_[index];\n        }\n      });\n    } // Do not add duplicate elements\n\n\n    if (this.trackElements_.indexOf(trackElement) === -1) {\n      this.trackElements_.push(trackElement);\n    }\n  }\n  /**\n   * Get an {@link HtmlTrackElement} from the `HtmlTrackElementList` given an\n   * {@link TextTrack}.\n   *\n   * @param {TextTrack} track\n   *        The track associated with a track element.\n   *\n   * @return {HtmlTrackElement|undefined}\n   *         The track element that was found or undefined.\n   *\n   * @private\n   */\n  ;\n\n  _proto.getTrackElementByTrack_ = function getTrackElementByTrack_(track) {\n    var trackElement_;\n\n    for (var i = 0, length = this.trackElements_.length; i < length; i++) {\n      if (track === this.trackElements_[i].track) {\n        trackElement_ = this.trackElements_[i];\n        break;\n      }\n    }\n\n    return trackElement_;\n  }\n  /**\n   * Remove a {@link HtmlTrackElement} from the `HtmlTrackElementList`\n   *\n   * @param {HtmlTrackElement} trackElement\n   *        The track element to remove from the list.\n   *\n   * @private\n   */\n  ;\n\n  _proto.removeTrackElement_ = function removeTrackElement_(trackElement) {\n    for (var i = 0, length = this.trackElements_.length; i < length; i++) {\n      if (trackElement === this.trackElements_[i]) {\n        if (this.trackElements_[i].track && typeof this.trackElements_[i].track.off === 'function') {\n          this.trackElements_[i].track.off();\n        }\n\n        if (typeof this.trackElements_[i].off === 'function') {\n          this.trackElements_[i].off();\n        }\n\n        this.trackElements_.splice(i, 1);\n        break;\n      }\n    }\n  };\n\n  return HtmlTrackElementList;\n}();\n\n/**\n * @file text-track-cue-list.js\n */\n\n/**\n * @typedef {Object} TextTrackCueList~TextTrackCue\n *\n * @property {string} id\n *           The unique id for this text track cue\n *\n * @property {number} startTime\n *           The start time for this text track cue\n *\n * @property {number} endTime\n *           The end time for this text track cue\n *\n * @property {boolean} pauseOnExit\n *           Pause when the end time is reached if true.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttrackcue}\n */\n\n/**\n * A List of TextTrackCues.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttrackcuelist}\n */\nvar TextTrackCueList = /*#__PURE__*/function () {\n  /**\n   * Create an instance of this class..\n   *\n   * @param {Array} cues\n   *        A list of cues to be initialized with\n   */\n  function TextTrackCueList(cues) {\n    TextTrackCueList.prototype.setCues_.call(this, cues);\n    /**\n     * @memberof TextTrackCueList\n     * @member {number} length\n     *         The current number of `TextTrackCue`s in the TextTrackCueList.\n     * @instance\n     */\n\n    Object.defineProperty(this, 'length', {\n      get: function get() {\n        return this.length_;\n      }\n    });\n  }\n  /**\n   * A setter for cues in this list. Creates getters\n   * an an index for the cues.\n   *\n   * @param {Array} cues\n   *        An array of cues to set\n   *\n   * @private\n   */\n\n\n  var _proto = TextTrackCueList.prototype;\n\n  _proto.setCues_ = function setCues_(cues) {\n    var oldLength = this.length || 0;\n    var i = 0;\n    var l = cues.length;\n    this.cues_ = cues;\n    this.length_ = cues.length;\n\n    var defineProp = function defineProp(index) {\n      if (!('' + index in this)) {\n        Object.defineProperty(this, '' + index, {\n          get: function get() {\n            return this.cues_[index];\n          }\n        });\n      }\n    };\n\n    if (oldLength < l) {\n      i = oldLength;\n\n      for (; i < l; i++) {\n        defineProp.call(this, i);\n      }\n    }\n  }\n  /**\n   * Get a `TextTrackCue` that is currently in the `TextTrackCueList` by id.\n   *\n   * @param {string} id\n   *        The id of the cue that should be searched for.\n   *\n   * @return {TextTrackCueList~TextTrackCue|null}\n   *         A single cue or null if none was found.\n   */\n  ;\n\n  _proto.getCueById = function getCueById(id) {\n    var result = null;\n\n    for (var i = 0, l = this.length; i < l; i++) {\n      var cue = this[i];\n\n      if (cue.id === id) {\n        result = cue;\n        break;\n      }\n    }\n\n    return result;\n  };\n\n  return TextTrackCueList;\n}();\n\n/**\n * @file track-kinds.js\n */\n\n/**\n * All possible `VideoTrackKind`s\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-videotrack-kind\n * @typedef VideoTrack~Kind\n * @enum\n */\nvar VideoTrackKind = {\n  alternative: 'alternative',\n  captions: 'captions',\n  main: 'main',\n  sign: 'sign',\n  subtitles: 'subtitles',\n  commentary: 'commentary'\n};\n/**\n * All possible `AudioTrackKind`s\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-audiotrack-kind\n * @typedef AudioTrack~Kind\n * @enum\n */\n\nvar AudioTrackKind = {\n  'alternative': 'alternative',\n  'descriptions': 'descriptions',\n  'main': 'main',\n  'main-desc': 'main-desc',\n  'translation': 'translation',\n  'commentary': 'commentary'\n};\n/**\n * All possible `TextTrackKind`s\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-texttrack-kind\n * @typedef TextTrack~Kind\n * @enum\n */\n\nvar TextTrackKind = {\n  subtitles: 'subtitles',\n  captions: 'captions',\n  descriptions: 'descriptions',\n  chapters: 'chapters',\n  metadata: 'metadata'\n};\n/**\n * All possible `TextTrackMode`s\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#texttrackmode\n * @typedef TextTrack~Mode\n * @enum\n */\n\nvar TextTrackMode = {\n  disabled: 'disabled',\n  hidden: 'hidden',\n  showing: 'showing'\n};\n\n/**\n * A Track class that contains all of the common functionality for {@link AudioTrack},\n * {@link VideoTrack}, and {@link TextTrack}.\n *\n * > Note: This class should not be used directly\n *\n * @see {@link https://html.spec.whatwg.org/multipage/embedded-content.html}\n * @extends EventTarget\n * @abstract\n */\n\nvar Track = /*#__PURE__*/function (_EventTarget) {\n  _inheritsLoose(Track, _EventTarget);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Object} [options={}]\n   *        Object of option names and values\n   *\n   * @param {string} [options.kind='']\n   *        A valid kind for the track type you are creating.\n   *\n   * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n   *        A unique id for this AudioTrack.\n   *\n   * @param {string} [options.label='']\n   *        The menu label for this track.\n   *\n   * @param {string} [options.language='']\n   *        A valid two character language code.\n   *\n   * @abstract\n   */\n  function Track(options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    _this = _EventTarget.call(this) || this;\n    var trackProps = {\n      id: options.id || 'vjs_track_' + newGUID(),\n      kind: options.kind || '',\n      language: options.language || ''\n    };\n    var label = options.label || '';\n    /**\n     * @memberof Track\n     * @member {string} id\n     *         The id of this track. Cannot be changed after creation.\n     * @instance\n     *\n     * @readonly\n     */\n\n    /**\n     * @memberof Track\n     * @member {string} kind\n     *         The kind of track that this is. Cannot be changed after creation.\n     * @instance\n     *\n     * @readonly\n     */\n\n    /**\n     * @memberof Track\n     * @member {string} language\n     *         The two letter language code for this track. Cannot be changed after\n     *         creation.\n     * @instance\n     *\n     * @readonly\n     */\n\n    var _loop = function _loop(key) {\n      Object.defineProperty(_assertThisInitialized(_this), key, {\n        get: function get() {\n          return trackProps[key];\n        },\n        set: function set() {}\n      });\n    };\n\n    for (var key in trackProps) {\n      _loop(key);\n    }\n    /**\n     * @memberof Track\n     * @member {string} label\n     *         The label of this track. Cannot be changed after creation.\n     * @instance\n     *\n     * @fires Track#labelchange\n     */\n\n\n    Object.defineProperty(_assertThisInitialized(_this), 'label', {\n      get: function get() {\n        return label;\n      },\n      set: function set(newLabel) {\n        if (newLabel !== label) {\n          label = newLabel;\n          /**\n           * An event that fires when label changes on this track.\n           *\n           * > Note: This is not part of the spec!\n           *\n           * @event Track#labelchange\n           * @type {EventTarget~Event}\n           */\n\n          this.trigger('labelchange');\n        }\n      }\n    });\n    return _this;\n  }\n\n  return Track;\n}(EventTarget$2);\n\n/**\n * @file url.js\n * @module url\n */\n/**\n * @typedef {Object} url:URLObject\n *\n * @property {string} protocol\n *           The protocol of the url that was parsed.\n *\n * @property {string} hostname\n *           The hostname of the url that was parsed.\n *\n * @property {string} port\n *           The port of the url that was parsed.\n *\n * @property {string} pathname\n *           The pathname of the url that was parsed.\n *\n * @property {string} search\n *           The search query of the url that was parsed.\n *\n * @property {string} hash\n *           The hash of the url that was parsed.\n *\n * @property {string} host\n *           The host of the url that was parsed.\n */\n\n/**\n * Resolve and parse the elements of a URL.\n *\n * @function\n * @param    {String} url\n *           The url to parse\n *\n * @return   {url:URLObject}\n *           An object of url details\n */\n\nvar parseUrl = function parseUrl(url) {\n  // This entire method can be replace with URL once we are able to drop IE11\n  var props = ['protocol', 'hostname', 'port', 'pathname', 'search', 'hash', 'host']; // add the url to an anchor and let the browser parse the URL\n\n  var a = document.createElement('a');\n  a.href = url; // Copy the specific URL properties to a new object\n  // This is also needed for IE because the anchor loses its\n  // properties when it's removed from the dom\n\n  var details = {};\n\n  for (var i = 0; i < props.length; i++) {\n    details[props[i]] = a[props[i]];\n  } // IE adds the port to the host property unlike everyone else. If\n  // a port identifier is added for standard ports, strip it.\n\n\n  if (details.protocol === 'http:') {\n    details.host = details.host.replace(/:80$/, '');\n  }\n\n  if (details.protocol === 'https:') {\n    details.host = details.host.replace(/:443$/, '');\n  }\n\n  if (!details.protocol) {\n    details.protocol = window$1.location.protocol;\n  }\n  /* istanbul ignore if */\n\n\n  if (!details.host) {\n    details.host = window$1.location.host;\n  }\n\n  return details;\n};\n/**\n * Get absolute version of relative URL. Used to tell Flash the correct URL.\n *\n * @function\n * @param    {string} url\n *           URL to make absolute\n *\n * @return   {string}\n *           Absolute URL\n *\n * @see      http://stackoverflow.com/questions/470832/getting-an-absolute-url-from-a-relative-one-ie6-issue\n */\n\nvar getAbsoluteURL = function getAbsoluteURL(url) {\n  // Check if absolute URL\n  if (!url.match(/^https?:\\/\\//)) {\n    // Convert to absolute URL. Flash hosted off-site needs an absolute URL.\n    // add the url to an anchor and let the browser parse the URL\n    var a = document.createElement('a');\n    a.href = url;\n    url = a.href;\n  }\n\n  return url;\n};\n/**\n * Returns the extension of the passed file name. It will return an empty string\n * if passed an invalid path.\n *\n * @function\n * @param    {string} path\n *           The fileName path like '/path/to/file.mp4'\n *\n * @return  {string}\n *           The extension in lower case or an empty string if no\n *           extension could be found.\n */\n\nvar getFileExtension = function getFileExtension(path) {\n  if (typeof path === 'string') {\n    var splitPathRe = /^(\\/?)([\\s\\S]*?)((?:\\.{1,2}|[^\\/]+?)(\\.([^\\.\\/\\?]+)))(?:[\\/]*|[\\?].*)$/;\n    var pathParts = splitPathRe.exec(path);\n\n    if (pathParts) {\n      return pathParts.pop().toLowerCase();\n    }\n  }\n\n  return '';\n};\n/**\n * Returns whether the url passed is a cross domain request or not.\n *\n * @function\n * @param    {string} url\n *           The url to check.\n *\n * @param    {Object} [winLoc]\n *           the domain to check the url against, defaults to window.location\n *\n * @param    {string} [winLoc.protocol]\n *           The window location protocol defaults to window.location.protocol\n *\n * @param    {string} [winLoc.host]\n *           The window location host defaults to window.location.host\n *\n * @return   {boolean}\n *           Whether it is a cross domain request or not.\n */\n\nvar isCrossOrigin = function isCrossOrigin(url, winLoc) {\n  if (winLoc === void 0) {\n    winLoc = window$1.location;\n  }\n\n  var urlInfo = parseUrl(url); // IE8 protocol relative urls will return ':' for protocol\n\n  var srcProtocol = urlInfo.protocol === ':' ? winLoc.protocol : urlInfo.protocol; // Check if url is for another domain/origin\n  // IE8 doesn't know location.origin, so we won't rely on it here\n\n  var crossOrigin = srcProtocol + urlInfo.host !== winLoc.protocol + winLoc.host;\n  return crossOrigin;\n};\n\nvar Url = /*#__PURE__*/Object.freeze({\n  __proto__: null,\n  parseUrl: parseUrl,\n  getAbsoluteURL: getAbsoluteURL,\n  getFileExtension: getFileExtension,\n  isCrossOrigin: isCrossOrigin\n});\n\n/**\n * Takes a webvtt file contents and parses it into cues\n *\n * @param {string} srcContent\n *        webVTT file contents\n *\n * @param {TextTrack} track\n *        TextTrack to add cues to. Cues come from the srcContent.\n *\n * @private\n */\n\nvar parseCues = function parseCues(srcContent, track) {\n  var parser = new window$1.WebVTT.Parser(window$1, window$1.vttjs, window$1.WebVTT.StringDecoder());\n  var errors = [];\n\n  parser.oncue = function (cue) {\n    track.addCue(cue);\n  };\n\n  parser.onparsingerror = function (error) {\n    errors.push(error);\n  };\n\n  parser.onflush = function () {\n    track.trigger({\n      type: 'loadeddata',\n      target: track\n    });\n  };\n\n  parser.parse(srcContent);\n\n  if (errors.length > 0) {\n    if (window$1.console && window$1.console.groupCollapsed) {\n      window$1.console.groupCollapsed(\"Text Track parsing errors for \" + track.src);\n    }\n\n    errors.forEach(function (error) {\n      return log$1.error(error);\n    });\n\n    if (window$1.console && window$1.console.groupEnd) {\n      window$1.console.groupEnd();\n    }\n  }\n\n  parser.flush();\n};\n/**\n * Load a `TextTrack` from a specified url.\n *\n * @param {string} src\n *        Url to load track from.\n *\n * @param {TextTrack} track\n *        Track to add cues to. Comes from the content at the end of `url`.\n *\n * @private\n */\n\n\nvar loadTrack = function loadTrack(src, track) {\n  var opts = {\n    uri: src\n  };\n  var crossOrigin = isCrossOrigin(src);\n\n  if (crossOrigin) {\n    opts.cors = crossOrigin;\n  }\n\n  var withCredentials = track.tech_.crossOrigin() === 'use-credentials';\n\n  if (withCredentials) {\n    opts.withCredentials = withCredentials;\n  }\n\n  XHR(opts, bind(this, function (err, response, responseBody) {\n    if (err) {\n      return log$1.error(err, response);\n    }\n\n    track.loaded_ = true; // Make sure that vttjs has loaded, otherwise, wait till it finished loading\n    // NOTE: this is only used for the alt/video.novtt.js build\n\n    if (typeof window$1.WebVTT !== 'function') {\n      if (track.tech_) {\n        // to prevent use before define eslint error, we define loadHandler\n        // as a let here\n        track.tech_.any(['vttjsloaded', 'vttjserror'], function (event) {\n          if (event.type === 'vttjserror') {\n            log$1.error(\"vttjs failed to load, stopping trying to process \" + track.src);\n            return;\n          }\n\n          return parseCues(responseBody, track);\n        });\n      }\n    } else {\n      parseCues(responseBody, track);\n    }\n  }));\n};\n/**\n * A representation of a single `TextTrack`.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttrack}\n * @extends Track\n */\n\n\nvar TextTrack = /*#__PURE__*/function (_Track) {\n  _inheritsLoose(TextTrack, _Track);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Object} options={}\n   *        Object of option names and values\n   *\n   * @param {Tech} options.tech\n   *        A reference to the tech that owns this TextTrack.\n   *\n   * @param {TextTrack~Kind} [options.kind='subtitles']\n   *        A valid text track kind.\n   *\n   * @param {TextTrack~Mode} [options.mode='disabled']\n   *        A valid text track mode.\n   *\n   * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n   *        A unique id for this TextTrack.\n   *\n   * @param {string} [options.label='']\n   *        The menu label for this track.\n   *\n   * @param {string} [options.language='']\n   *        A valid two character language code.\n   *\n   * @param {string} [options.srclang='']\n   *        A valid two character language code. An alternative, but deprioritized\n   *        version of `options.language`\n   *\n   * @param {string} [options.src]\n   *        A url to TextTrack cues.\n   *\n   * @param {boolean} [options.default]\n   *        If this track should default to on or off.\n   */\n  function TextTrack(options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    if (!options.tech) {\n      throw new Error('A tech was not provided.');\n    }\n\n    var settings = mergeOptions$3(options, {\n      kind: TextTrackKind[options.kind] || 'subtitles',\n      language: options.language || options.srclang || ''\n    });\n    var mode = TextTrackMode[settings.mode] || 'disabled';\n    var default_ = settings[\"default\"];\n\n    if (settings.kind === 'metadata' || settings.kind === 'chapters') {\n      mode = 'hidden';\n    }\n\n    _this = _Track.call(this, settings) || this;\n    _this.tech_ = settings.tech;\n    _this.cues_ = [];\n    _this.activeCues_ = [];\n    _this.preload_ = _this.tech_.preloadTextTracks !== false;\n    var cues = new TextTrackCueList(_this.cues_);\n    var activeCues = new TextTrackCueList(_this.activeCues_);\n    var changed = false;\n    var timeupdateHandler = bind(_assertThisInitialized(_this), function () {\n      if (!this.tech_.isReady_ || this.tech_.isDisposed()) {\n        return;\n      } // Accessing this.activeCues for the side-effects of updating itself\n      // due to its nature as a getter function. Do not remove or cues will\n      // stop updating!\n      // Use the setter to prevent deletion from uglify (pure_getters rule)\n\n\n      this.activeCues = this.activeCues;\n\n      if (changed) {\n        this.trigger('cuechange');\n        changed = false;\n      }\n    });\n\n    var disposeHandler = function disposeHandler() {\n      _this.tech_.off('timeupdate', timeupdateHandler);\n    };\n\n    _this.tech_.one('dispose', disposeHandler);\n\n    if (mode !== 'disabled') {\n      _this.tech_.on('timeupdate', timeupdateHandler);\n    }\n\n    Object.defineProperties(_assertThisInitialized(_this), {\n      /**\n       * @memberof TextTrack\n       * @member {boolean} default\n       *         If this track was set to be on or off by default. Cannot be changed after\n       *         creation.\n       * @instance\n       *\n       * @readonly\n       */\n      \"default\": {\n        get: function get() {\n          return default_;\n        },\n        set: function set() {}\n      },\n\n      /**\n       * @memberof TextTrack\n       * @member {string} mode\n       *         Set the mode of this TextTrack to a valid {@link TextTrack~Mode}. Will\n       *         not be set if setting to an invalid mode.\n       * @instance\n       *\n       * @fires TextTrack#modechange\n       */\n      mode: {\n        get: function get() {\n          return mode;\n        },\n        set: function set(newMode) {\n          if (!TextTrackMode[newMode]) {\n            return;\n          }\n\n          if (mode === newMode) {\n            return;\n          }\n\n          mode = newMode;\n\n          if (!this.preload_ && mode !== 'disabled' && this.cues.length === 0) {\n            // On-demand load.\n            loadTrack(this.src, this);\n          }\n\n          this.tech_.off('timeupdate', timeupdateHandler);\n\n          if (mode !== 'disabled') {\n            this.tech_.on('timeupdate', timeupdateHandler);\n          }\n          /**\n           * An event that fires when mode changes on this track. This allows\n           * the TextTrackList that holds this track to act accordingly.\n           *\n           * > Note: This is not part of the spec!\n           *\n           * @event TextTrack#modechange\n           * @type {EventTarget~Event}\n           */\n\n\n          this.trigger('modechange');\n        }\n      },\n\n      /**\n       * @memberof TextTrack\n       * @member {TextTrackCueList} cues\n       *         The text track cue list for this TextTrack.\n       * @instance\n       */\n      cues: {\n        get: function get() {\n          if (!this.loaded_) {\n            return null;\n          }\n\n          return cues;\n        },\n        set: function set() {}\n      },\n\n      /**\n       * @memberof TextTrack\n       * @member {TextTrackCueList} activeCues\n       *         The list text track cues that are currently active for this TextTrack.\n       * @instance\n       */\n      activeCues: {\n        get: function get() {\n          if (!this.loaded_) {\n            return null;\n          } // nothing to do\n\n\n          if (this.cues.length === 0) {\n            return activeCues;\n          }\n\n          var ct = this.tech_.currentTime();\n          var active = [];\n\n          for (var i = 0, l = this.cues.length; i < l; i++) {\n            var cue = this.cues[i];\n\n            if (cue.startTime <= ct && cue.endTime >= ct) {\n              active.push(cue);\n            } else if (cue.startTime === cue.endTime && cue.startTime <= ct && cue.startTime + 0.5 >= ct) {\n              active.push(cue);\n            }\n          }\n\n          changed = false;\n\n          if (active.length !== this.activeCues_.length) {\n            changed = true;\n          } else {\n            for (var _i = 0; _i < active.length; _i++) {\n              if (this.activeCues_.indexOf(active[_i]) === -1) {\n                changed = true;\n              }\n            }\n          }\n\n          this.activeCues_ = active;\n          activeCues.setCues_(this.activeCues_);\n          return activeCues;\n        },\n        // /!\\ Keep this setter empty (see the timeupdate handler above)\n        set: function set() {}\n      }\n    });\n\n    if (settings.src) {\n      _this.src = settings.src;\n\n      if (!_this.preload_) {\n        // Tracks will load on-demand.\n        // Act like we're loaded for other purposes.\n        _this.loaded_ = true;\n      }\n\n      if (_this.preload_ || settings.kind !== 'subtitles' && settings.kind !== 'captions') {\n        loadTrack(_this.src, _assertThisInitialized(_this));\n      }\n    } else {\n      _this.loaded_ = true;\n    }\n\n    return _this;\n  }\n  /**\n   * Add a cue to the internal list of cues.\n   *\n   * @param {TextTrack~Cue} cue\n   *        The cue to add to our internal list\n   */\n\n\n  var _proto = TextTrack.prototype;\n\n  _proto.addCue = function addCue(originalCue) {\n    var cue = originalCue;\n\n    if (window$1.vttjs && !(originalCue instanceof window$1.vttjs.VTTCue)) {\n      cue = new window$1.vttjs.VTTCue(originalCue.startTime, originalCue.endTime, originalCue.text);\n\n      for (var prop in originalCue) {\n        if (!(prop in cue)) {\n          cue[prop] = originalCue[prop];\n        }\n      } // make sure that `id` is copied over\n\n\n      cue.id = originalCue.id;\n      cue.originalCue_ = originalCue;\n    }\n\n    var tracks = this.tech_.textTracks();\n\n    for (var i = 0; i < tracks.length; i++) {\n      if (tracks[i] !== this) {\n        tracks[i].removeCue(cue);\n      }\n    }\n\n    this.cues_.push(cue);\n    this.cues.setCues_(this.cues_);\n  }\n  /**\n   * Remove a cue from our internal list\n   *\n   * @param {TextTrack~Cue} removeCue\n   *        The cue to remove from our internal list\n   */\n  ;\n\n  _proto.removeCue = function removeCue(_removeCue) {\n    var i = this.cues_.length;\n\n    while (i--) {\n      var cue = this.cues_[i];\n\n      if (cue === _removeCue || cue.originalCue_ && cue.originalCue_ === _removeCue) {\n        this.cues_.splice(i, 1);\n        this.cues.setCues_(this.cues_);\n        break;\n      }\n    }\n  };\n\n  return TextTrack;\n}(Track);\n/**\n * cuechange - One or more cues in the track have become active or stopped being active.\n */\n\n\nTextTrack.prototype.allowedEvents_ = {\n  cuechange: 'cuechange'\n};\n\n/**\n * A representation of a single `AudioTrack`. If it is part of an {@link AudioTrackList}\n * only one `AudioTrack` in the list will be enabled at a time.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#audiotrack}\n * @extends Track\n */\n\nvar AudioTrack = /*#__PURE__*/function (_Track) {\n  _inheritsLoose(AudioTrack, _Track);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Object} [options={}]\n   *        Object of option names and values\n   *\n   * @param {AudioTrack~Kind} [options.kind='']\n   *        A valid audio track kind\n   *\n   * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n   *        A unique id for this AudioTrack.\n   *\n   * @param {string} [options.label='']\n   *        The menu label for this track.\n   *\n   * @param {string} [options.language='']\n   *        A valid two character language code.\n   *\n   * @param {boolean} [options.enabled]\n   *        If this track is the one that is currently playing. If this track is part of\n   *        an {@link AudioTrackList}, only one {@link AudioTrack} will be enabled.\n   */\n  function AudioTrack(options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    var settings = mergeOptions$3(options, {\n      kind: AudioTrackKind[options.kind] || ''\n    });\n    _this = _Track.call(this, settings) || this;\n    var enabled = false;\n    /**\n     * @memberof AudioTrack\n     * @member {boolean} enabled\n     *         If this `AudioTrack` is enabled or not. When setting this will\n     *         fire {@link AudioTrack#enabledchange} if the state of enabled is changed.\n     * @instance\n     *\n     * @fires VideoTrack#selectedchange\n     */\n\n    Object.defineProperty(_assertThisInitialized(_this), 'enabled', {\n      get: function get() {\n        return enabled;\n      },\n      set: function set(newEnabled) {\n        // an invalid or unchanged value\n        if (typeof newEnabled !== 'boolean' || newEnabled === enabled) {\n          return;\n        }\n\n        enabled = newEnabled;\n        /**\n         * An event that fires when enabled changes on this track. This allows\n         * the AudioTrackList that holds this track to act accordingly.\n         *\n         * > Note: This is not part of the spec! Native tracks will do\n         *         this internally without an event.\n         *\n         * @event AudioTrack#enabledchange\n         * @type {EventTarget~Event}\n         */\n\n        this.trigger('enabledchange');\n      }\n    }); // if the user sets this track to selected then\n    // set selected to that true value otherwise\n    // we keep it false\n\n    if (settings.enabled) {\n      _this.enabled = settings.enabled;\n    }\n\n    _this.loaded_ = true;\n    return _this;\n  }\n\n  return AudioTrack;\n}(Track);\n\n/**\n * A representation of a single `VideoTrack`.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#videotrack}\n * @extends Track\n */\n\nvar VideoTrack = /*#__PURE__*/function (_Track) {\n  _inheritsLoose(VideoTrack, _Track);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Object} [options={}]\n   *        Object of option names and values\n   *\n   * @param {string} [options.kind='']\n   *        A valid {@link VideoTrack~Kind}\n   *\n   * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n   *        A unique id for this AudioTrack.\n   *\n   * @param {string} [options.label='']\n   *        The menu label for this track.\n   *\n   * @param {string} [options.language='']\n   *        A valid two character language code.\n   *\n   * @param {boolean} [options.selected]\n   *        If this track is the one that is currently playing.\n   */\n  function VideoTrack(options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    var settings = mergeOptions$3(options, {\n      kind: VideoTrackKind[options.kind] || ''\n    });\n    _this = _Track.call(this, settings) || this;\n    var selected = false;\n    /**\n     * @memberof VideoTrack\n     * @member {boolean} selected\n     *         If this `VideoTrack` is selected or not. When setting this will\n     *         fire {@link VideoTrack#selectedchange} if the state of selected changed.\n     * @instance\n     *\n     * @fires VideoTrack#selectedchange\n     */\n\n    Object.defineProperty(_assertThisInitialized(_this), 'selected', {\n      get: function get() {\n        return selected;\n      },\n      set: function set(newSelected) {\n        // an invalid or unchanged value\n        if (typeof newSelected !== 'boolean' || newSelected === selected) {\n          return;\n        }\n\n        selected = newSelected;\n        /**\n         * An event that fires when selected changes on this track. This allows\n         * the VideoTrackList that holds this track to act accordingly.\n         *\n         * > Note: This is not part of the spec! Native tracks will do\n         *         this internally without an event.\n         *\n         * @event VideoTrack#selectedchange\n         * @type {EventTarget~Event}\n         */\n\n        this.trigger('selectedchange');\n      }\n    }); // if the user sets this track to selected then\n    // set selected to that true value otherwise\n    // we keep it false\n\n    if (settings.selected) {\n      _this.selected = settings.selected;\n    }\n\n    return _this;\n  }\n\n  return VideoTrack;\n}(Track);\n\n/**\n * @memberof HTMLTrackElement\n * @typedef {HTMLTrackElement~ReadyState}\n * @enum {number}\n */\n\nvar NONE = 0;\nvar LOADING = 1;\nvar LOADED = 2;\nvar ERROR = 3;\n/**\n * A single track represented in the DOM.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#htmltrackelement}\n * @extends EventTarget\n */\n\nvar HTMLTrackElement = /*#__PURE__*/function (_EventTarget) {\n  _inheritsLoose(HTMLTrackElement, _EventTarget);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Object} options={}\n   *        Object of option names and values\n   *\n   * @param {Tech} options.tech\n   *        A reference to the tech that owns this HTMLTrackElement.\n   *\n   * @param {TextTrack~Kind} [options.kind='subtitles']\n   *        A valid text track kind.\n   *\n   * @param {TextTrack~Mode} [options.mode='disabled']\n   *        A valid text track mode.\n   *\n   * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n   *        A unique id for this TextTrack.\n   *\n   * @param {string} [options.label='']\n   *        The menu label for this track.\n   *\n   * @param {string} [options.language='']\n   *        A valid two character language code.\n   *\n   * @param {string} [options.srclang='']\n   *        A valid two character language code. An alternative, but deprioritized\n   *        version of `options.language`\n   *\n   * @param {string} [options.src]\n   *        A url to TextTrack cues.\n   *\n   * @param {boolean} [options.default]\n   *        If this track should default to on or off.\n   */\n  function HTMLTrackElement(options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    _this = _EventTarget.call(this) || this;\n    var readyState;\n    var track = new TextTrack(options);\n    _this.kind = track.kind;\n    _this.src = track.src;\n    _this.srclang = track.language;\n    _this.label = track.label;\n    _this[\"default\"] = track[\"default\"];\n    Object.defineProperties(_assertThisInitialized(_this), {\n      /**\n       * @memberof HTMLTrackElement\n       * @member {HTMLTrackElement~ReadyState} readyState\n       *         The current ready state of the track element.\n       * @instance\n       */\n      readyState: {\n        get: function get() {\n          return readyState;\n        }\n      },\n\n      /**\n       * @memberof HTMLTrackElement\n       * @member {TextTrack} track\n       *         The underlying TextTrack object.\n       * @instance\n       *\n       */\n      track: {\n        get: function get() {\n          return track;\n        }\n      }\n    });\n    readyState = NONE;\n    /**\n     * @listens TextTrack#loadeddata\n     * @fires HTMLTrackElement#load\n     */\n\n    track.addEventListener('loadeddata', function () {\n      readyState = LOADED;\n\n      _this.trigger({\n        type: 'load',\n        target: _assertThisInitialized(_this)\n      });\n    });\n    return _this;\n  }\n\n  return HTMLTrackElement;\n}(EventTarget$2);\n\nHTMLTrackElement.prototype.allowedEvents_ = {\n  load: 'load'\n};\nHTMLTrackElement.NONE = NONE;\nHTMLTrackElement.LOADING = LOADING;\nHTMLTrackElement.LOADED = LOADED;\nHTMLTrackElement.ERROR = ERROR;\n\n/*\n * This file contains all track properties that are used in\n * player.js, tech.js, html5.js and possibly other techs in the future.\n */\n\nvar NORMAL = {\n  audio: {\n    ListClass: AudioTrackList,\n    TrackClass: AudioTrack,\n    capitalName: 'Audio'\n  },\n  video: {\n    ListClass: VideoTrackList,\n    TrackClass: VideoTrack,\n    capitalName: 'Video'\n  },\n  text: {\n    ListClass: TextTrackList,\n    TrackClass: TextTrack,\n    capitalName: 'Text'\n  }\n};\nObject.keys(NORMAL).forEach(function (type) {\n  NORMAL[type].getterName = type + \"Tracks\";\n  NORMAL[type].privateName = type + \"Tracks_\";\n});\nvar REMOTE = {\n  remoteText: {\n    ListClass: TextTrackList,\n    TrackClass: TextTrack,\n    capitalName: 'RemoteText',\n    getterName: 'remoteTextTracks',\n    privateName: 'remoteTextTracks_'\n  },\n  remoteTextEl: {\n    ListClass: HtmlTrackElementList,\n    TrackClass: HTMLTrackElement,\n    capitalName: 'RemoteTextTrackEls',\n    getterName: 'remoteTextTrackEls',\n    privateName: 'remoteTextTrackEls_'\n  }\n};\n\nvar ALL = _extends({}, NORMAL, REMOTE);\n\nREMOTE.names = Object.keys(REMOTE);\nNORMAL.names = Object.keys(NORMAL);\nALL.names = [].concat(REMOTE.names).concat(NORMAL.names);\n\n/**\n * An Object containing a structure like: `{src: 'url', type: 'mimetype'}` or string\n * that just contains the src url alone.\n * * `var SourceObject = {src: 'http://ex.com/video.mp4', type: 'video/mp4'};`\n   * `var SourceString = 'http://example.com/some-video.mp4';`\n *\n * @typedef {Object|string} Tech~SourceObject\n *\n * @property {string} src\n *           The url to the source\n *\n * @property {string} type\n *           The mime type of the source\n */\n\n/**\n * A function used by {@link Tech} to create a new {@link TextTrack}.\n *\n * @private\n *\n * @param {Tech} self\n *        An instance of the Tech class.\n *\n * @param {string} kind\n *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata)\n *\n * @param {string} [label]\n *        Label to identify the text track\n *\n * @param {string} [language]\n *        Two letter language abbreviation\n *\n * @param {Object} [options={}]\n *        An object with additional text track options\n *\n * @return {TextTrack}\n *          The text track that was created.\n */\n\nfunction createTrackHelper(self, kind, label, language, options) {\n  if (options === void 0) {\n    options = {};\n  }\n\n  var tracks = self.textTracks();\n  options.kind = kind;\n\n  if (label) {\n    options.label = label;\n  }\n\n  if (language) {\n    options.language = language;\n  }\n\n  options.tech = self;\n  var track = new ALL.text.TrackClass(options);\n  tracks.addTrack(track);\n  return track;\n}\n/**\n * This is the base class for media playback technology controllers, such as\n * {@link HTML5}\n *\n * @extends Component\n */\n\n\nvar Tech = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(Tech, _Component);\n\n  /**\n  * Create an instance of this Tech.\n  *\n  * @param {Object} [options]\n  *        The key/value store of player options.\n  *\n  * @param {Component~ReadyCallback} ready\n  *        Callback function to call when the `HTML5` Tech is ready.\n  */\n  function Tech(options, ready) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    if (ready === void 0) {\n      ready = function ready() {};\n    }\n\n    // we don't want the tech to report user activity automatically.\n    // This is done manually in addControlsListeners\n    options.reportTouchActivity = false;\n    _this = _Component.call(this, null, options, ready) || this;\n\n    _this.onDurationChange_ = function (e) {\n      return _this.onDurationChange(e);\n    };\n\n    _this.trackProgress_ = function (e) {\n      return _this.trackProgress(e);\n    };\n\n    _this.trackCurrentTime_ = function (e) {\n      return _this.trackCurrentTime(e);\n    };\n\n    _this.stopTrackingCurrentTime_ = function (e) {\n      return _this.stopTrackingCurrentTime(e);\n    };\n\n    _this.disposeSourceHandler_ = function (e) {\n      return _this.disposeSourceHandler(e);\n    }; // keep track of whether the current source has played at all to\n    // implement a very limited played()\n\n\n    _this.hasStarted_ = false;\n\n    _this.on('playing', function () {\n      this.hasStarted_ = true;\n    });\n\n    _this.on('loadstart', function () {\n      this.hasStarted_ = false;\n    });\n\n    ALL.names.forEach(function (name) {\n      var props = ALL[name];\n\n      if (options && options[props.getterName]) {\n        _this[props.privateName] = options[props.getterName];\n      }\n    }); // Manually track progress in cases where the browser/tech doesn't report it.\n\n    if (!_this.featuresProgressEvents) {\n      _this.manualProgressOn();\n    } // Manually track timeupdates in cases where the browser/tech doesn't report it.\n\n\n    if (!_this.featuresTimeupdateEvents) {\n      _this.manualTimeUpdatesOn();\n    }\n\n    ['Text', 'Audio', 'Video'].forEach(function (track) {\n      if (options[\"native\" + track + \"Tracks\"] === false) {\n        _this[\"featuresNative\" + track + \"Tracks\"] = false;\n      }\n    });\n\n    if (options.nativeCaptions === false || options.nativeTextTracks === false) {\n      _this.featuresNativeTextTracks = false;\n    } else if (options.nativeCaptions === true || options.nativeTextTracks === true) {\n      _this.featuresNativeTextTracks = true;\n    }\n\n    if (!_this.featuresNativeTextTracks) {\n      _this.emulateTextTracks();\n    }\n\n    _this.preloadTextTracks = options.preloadTextTracks !== false;\n    _this.autoRemoteTextTracks_ = new ALL.text.ListClass();\n\n    _this.initTrackListeners(); // Turn on component tap events only if not using native controls\n\n\n    if (!options.nativeControlsForTouch) {\n      _this.emitTapEvents();\n    }\n\n    if (_this.constructor) {\n      _this.name_ = _this.constructor.name || 'Unknown Tech';\n    }\n\n    return _this;\n  }\n  /**\n   * A special function to trigger source set in a way that will allow player\n   * to re-trigger if the player or tech are not ready yet.\n   *\n   * @fires Tech#sourceset\n   * @param {string} src The source string at the time of the source changing.\n   */\n\n\n  var _proto = Tech.prototype;\n\n  _proto.triggerSourceset = function triggerSourceset(src) {\n    var _this2 = this;\n\n    if (!this.isReady_) {\n      // on initial ready we have to trigger source set\n      // 1ms after ready so that player can watch for it.\n      this.one('ready', function () {\n        return _this2.setTimeout(function () {\n          return _this2.triggerSourceset(src);\n        }, 1);\n      });\n    }\n    /**\n     * Fired when the source is set on the tech causing the media element\n     * to reload.\n     *\n     * @see {@link Player#event:sourceset}\n     * @event Tech#sourceset\n     * @type {EventTarget~Event}\n     */\n\n\n    this.trigger({\n      src: src,\n      type: 'sourceset'\n    });\n  }\n  /* Fallbacks for unsupported event types\n  ================================================================================ */\n\n  /**\n   * Polyfill the `progress` event for browsers that don't support it natively.\n   *\n   * @see {@link Tech#trackProgress}\n   */\n  ;\n\n  _proto.manualProgressOn = function manualProgressOn() {\n    this.on('durationchange', this.onDurationChange_);\n    this.manualProgress = true; // Trigger progress watching when a source begins loading\n\n    this.one('ready', this.trackProgress_);\n  }\n  /**\n   * Turn off the polyfill for `progress` events that was created in\n   * {@link Tech#manualProgressOn}\n   */\n  ;\n\n  _proto.manualProgressOff = function manualProgressOff() {\n    this.manualProgress = false;\n    this.stopTrackingProgress();\n    this.off('durationchange', this.onDurationChange_);\n  }\n  /**\n   * This is used to trigger a `progress` event when the buffered percent changes. It\n   * sets an interval function that will be called every 500 milliseconds to check if the\n   * buffer end percent has changed.\n   *\n   * > This function is called by {@link Tech#manualProgressOn}\n   *\n   * @param {EventTarget~Event} event\n   *        The `ready` event that caused this to run.\n   *\n   * @listens Tech#ready\n   * @fires Tech#progress\n   */\n  ;\n\n  _proto.trackProgress = function trackProgress(event) {\n    this.stopTrackingProgress();\n    this.progressInterval = this.setInterval(bind(this, function () {\n      // Don't trigger unless buffered amount is greater than last time\n      var numBufferedPercent = this.bufferedPercent();\n\n      if (this.bufferedPercent_ !== numBufferedPercent) {\n        /**\n         * See {@link Player#progress}\n         *\n         * @event Tech#progress\n         * @type {EventTarget~Event}\n         */\n        this.trigger('progress');\n      }\n\n      this.bufferedPercent_ = numBufferedPercent;\n\n      if (numBufferedPercent === 1) {\n        this.stopTrackingProgress();\n      }\n    }), 500);\n  }\n  /**\n   * Update our internal duration on a `durationchange` event by calling\n   * {@link Tech#duration}.\n   *\n   * @param {EventTarget~Event} event\n   *        The `durationchange` event that caused this to run.\n   *\n   * @listens Tech#durationchange\n   */\n  ;\n\n  _proto.onDurationChange = function onDurationChange(event) {\n    this.duration_ = this.duration();\n  }\n  /**\n   * Get and create a `TimeRange` object for buffering.\n   *\n   * @return {TimeRange}\n   *         The time range object that was created.\n   */\n  ;\n\n  _proto.buffered = function buffered() {\n    return createTimeRanges(0, 0);\n  }\n  /**\n   * Get the percentage of the current video that is currently buffered.\n   *\n   * @return {number}\n   *         A number from 0 to 1 that represents the decimal percentage of the\n   *         video that is buffered.\n   *\n   */\n  ;\n\n  _proto.bufferedPercent = function bufferedPercent$1() {\n    return bufferedPercent(this.buffered(), this.duration_);\n  }\n  /**\n   * Turn off the polyfill for `progress` events that was created in\n   * {@link Tech#manualProgressOn}\n   * Stop manually tracking progress events by clearing the interval that was set in\n   * {@link Tech#trackProgress}.\n   */\n  ;\n\n  _proto.stopTrackingProgress = function stopTrackingProgress() {\n    this.clearInterval(this.progressInterval);\n  }\n  /**\n   * Polyfill the `timeupdate` event for browsers that don't support it.\n   *\n   * @see {@link Tech#trackCurrentTime}\n   */\n  ;\n\n  _proto.manualTimeUpdatesOn = function manualTimeUpdatesOn() {\n    this.manualTimeUpdates = true;\n    this.on('play', this.trackCurrentTime_);\n    this.on('pause', this.stopTrackingCurrentTime_);\n  }\n  /**\n   * Turn off the polyfill for `timeupdate` events that was created in\n   * {@link Tech#manualTimeUpdatesOn}\n   */\n  ;\n\n  _proto.manualTimeUpdatesOff = function manualTimeUpdatesOff() {\n    this.manualTimeUpdates = false;\n    this.stopTrackingCurrentTime();\n    this.off('play', this.trackCurrentTime_);\n    this.off('pause', this.stopTrackingCurrentTime_);\n  }\n  /**\n   * Sets up an interval function to track current time and trigger `timeupdate` every\n   * 250 milliseconds.\n   *\n   * @listens Tech#play\n   * @triggers Tech#timeupdate\n   */\n  ;\n\n  _proto.trackCurrentTime = function trackCurrentTime() {\n    if (this.currentTimeInterval) {\n      this.stopTrackingCurrentTime();\n    }\n\n    this.currentTimeInterval = this.setInterval(function () {\n      /**\n       * Triggered at an interval of 250ms to indicated that time is passing in the video.\n       *\n       * @event Tech#timeupdate\n       * @type {EventTarget~Event}\n       */\n      this.trigger({\n        type: 'timeupdate',\n        target: this,\n        manuallyTriggered: true\n      }); // 42 = 24 fps // 250 is what Webkit uses // FF uses 15\n    }, 250);\n  }\n  /**\n   * Stop the interval function created in {@link Tech#trackCurrentTime} so that the\n   * `timeupdate` event is no longer triggered.\n   *\n   * @listens {Tech#pause}\n   */\n  ;\n\n  _proto.stopTrackingCurrentTime = function stopTrackingCurrentTime() {\n    this.clearInterval(this.currentTimeInterval); // #1002 - if the video ends right before the next timeupdate would happen,\n    // the progress bar won't make it all the way to the end\n\n    this.trigger({\n      type: 'timeupdate',\n      target: this,\n      manuallyTriggered: true\n    });\n  }\n  /**\n   * Turn off all event polyfills, clear the `Tech`s {@link AudioTrackList},\n   * {@link VideoTrackList}, and {@link TextTrackList}, and dispose of this Tech.\n   *\n   * @fires Component#dispose\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    // clear out all tracks because we can't reuse them between techs\n    this.clearTracks(NORMAL.names); // Turn off any manual progress or timeupdate tracking\n\n    if (this.manualProgress) {\n      this.manualProgressOff();\n    }\n\n    if (this.manualTimeUpdates) {\n      this.manualTimeUpdatesOff();\n    }\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Clear out a single `TrackList` or an array of `TrackLists` given their names.\n   *\n   * > Note: Techs without source handlers should call this between sources for `video`\n   *         & `audio` tracks. You don't want to use them between tracks!\n   *\n   * @param {string[]|string} types\n   *        TrackList names to clear, valid names are `video`, `audio`, and\n   *        `text`.\n   */\n  ;\n\n  _proto.clearTracks = function clearTracks(types) {\n    var _this3 = this;\n\n    types = [].concat(types); // clear out all tracks because we can't reuse them between techs\n\n    types.forEach(function (type) {\n      var list = _this3[type + \"Tracks\"]() || [];\n      var i = list.length;\n\n      while (i--) {\n        var track = list[i];\n\n        if (type === 'text') {\n          _this3.removeRemoteTextTrack(track);\n        }\n\n        list.removeTrack(track);\n      }\n    });\n  }\n  /**\n   * Remove any TextTracks added via addRemoteTextTrack that are\n   * flagged for automatic garbage collection\n   */\n  ;\n\n  _proto.cleanupAutoTextTracks = function cleanupAutoTextTracks() {\n    var list = this.autoRemoteTextTracks_ || [];\n    var i = list.length;\n\n    while (i--) {\n      var track = list[i];\n      this.removeRemoteTextTrack(track);\n    }\n  }\n  /**\n   * Reset the tech, which will removes all sources and reset the internal readyState.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.reset = function reset() {}\n  /**\n   * Get the value of `crossOrigin` from the tech.\n   *\n   * @abstract\n   *\n   * @see {Html5#crossOrigin}\n   */\n  ;\n\n  _proto.crossOrigin = function crossOrigin() {}\n  /**\n   * Set the value of `crossOrigin` on the tech.\n   *\n   * @abstract\n   *\n   * @param {string} crossOrigin the crossOrigin value\n   * @see {Html5#setCrossOrigin}\n   */\n  ;\n\n  _proto.setCrossOrigin = function setCrossOrigin() {}\n  /**\n   * Get or set an error on the Tech.\n   *\n   * @param {MediaError} [err]\n   *        Error to set on the Tech\n   *\n   * @return {MediaError|null}\n   *         The current error object on the tech, or null if there isn't one.\n   */\n  ;\n\n  _proto.error = function error(err) {\n    if (err !== undefined) {\n      this.error_ = new MediaError(err);\n      this.trigger('error');\n    }\n\n    return this.error_;\n  }\n  /**\n   * Returns the `TimeRange`s that have been played through for the current source.\n   *\n   * > NOTE: This implementation is incomplete. It does not track the played `TimeRange`.\n   *         It only checks whether the source has played at all or not.\n   *\n   * @return {TimeRange}\n   *         - A single time range if this video has played\n   *         - An empty set of ranges if not.\n   */\n  ;\n\n  _proto.played = function played() {\n    if (this.hasStarted_) {\n      return createTimeRanges(0, 0);\n    }\n\n    return createTimeRanges();\n  }\n  /**\n   * Start playback\n   *\n   * @abstract\n   *\n   * @see {Html5#play}\n   */\n  ;\n\n  _proto.play = function play() {}\n  /**\n   * Set whether we are scrubbing or not\n   *\n   * @abstract\n   *\n   * @see {Html5#setScrubbing}\n   */\n  ;\n\n  _proto.setScrubbing = function setScrubbing() {}\n  /**\n   * Get whether we are scrubbing or not\n   *\n   * @abstract\n   *\n   * @see {Html5#scrubbing}\n   */\n  ;\n\n  _proto.scrubbing = function scrubbing() {}\n  /**\n   * Causes a manual time update to occur if {@link Tech#manualTimeUpdatesOn} was\n   * previously called.\n   *\n   * @fires Tech#timeupdate\n   */\n  ;\n\n  _proto.setCurrentTime = function setCurrentTime() {\n    // improve the accuracy of manual timeupdates\n    if (this.manualTimeUpdates) {\n      /**\n       * A manual `timeupdate` event.\n       *\n       * @event Tech#timeupdate\n       * @type {EventTarget~Event}\n       */\n      this.trigger({\n        type: 'timeupdate',\n        target: this,\n        manuallyTriggered: true\n      });\n    }\n  }\n  /**\n   * Turn on listeners for {@link VideoTrackList}, {@link {AudioTrackList}, and\n   * {@link TextTrackList} events.\n   *\n   * This adds {@link EventTarget~EventListeners} for `addtrack`, and  `removetrack`.\n   *\n   * @fires Tech#audiotrackchange\n   * @fires Tech#videotrackchange\n   * @fires Tech#texttrackchange\n   */\n  ;\n\n  _proto.initTrackListeners = function initTrackListeners() {\n    var _this4 = this;\n\n    /**\n      * Triggered when tracks are added or removed on the Tech {@link AudioTrackList}\n      *\n      * @event Tech#audiotrackchange\n      * @type {EventTarget~Event}\n      */\n\n    /**\n      * Triggered when tracks are added or removed on the Tech {@link VideoTrackList}\n      *\n      * @event Tech#videotrackchange\n      * @type {EventTarget~Event}\n      */\n\n    /**\n      * Triggered when tracks are added or removed on the Tech {@link TextTrackList}\n      *\n      * @event Tech#texttrackchange\n      * @type {EventTarget~Event}\n      */\n    NORMAL.names.forEach(function (name) {\n      var props = NORMAL[name];\n\n      var trackListChanges = function trackListChanges() {\n        _this4.trigger(name + \"trackchange\");\n      };\n\n      var tracks = _this4[props.getterName]();\n\n      tracks.addEventListener('removetrack', trackListChanges);\n      tracks.addEventListener('addtrack', trackListChanges);\n\n      _this4.on('dispose', function () {\n        tracks.removeEventListener('removetrack', trackListChanges);\n        tracks.removeEventListener('addtrack', trackListChanges);\n      });\n    });\n  }\n  /**\n   * Emulate TextTracks using vtt.js if necessary\n   *\n   * @fires Tech#vttjsloaded\n   * @fires Tech#vttjserror\n   */\n  ;\n\n  _proto.addWebVttScript_ = function addWebVttScript_() {\n    var _this5 = this;\n\n    if (window$1.WebVTT) {\n      return;\n    } // Initially, Tech.el_ is a child of a dummy-div wait until the Component system\n    // signals that the Tech is ready at which point Tech.el_ is part of the DOM\n    // before inserting the WebVTT script\n\n\n    if (document.body.contains(this.el())) {\n      // load via require if available and vtt.js script location was not passed in\n      // as an option. novtt builds will turn the above require call into an empty object\n      // which will cause this if check to always fail.\n      if (!this.options_['vtt.js'] && isPlain(vtt) && Object.keys(vtt).length > 0) {\n        this.trigger('vttjsloaded');\n        return;\n      } // load vtt.js via the script location option or the cdn of no location was\n      // passed in\n\n\n      var script = document.createElement('script');\n      script.src = this.options_['vtt.js'] || 'https://vjs.zencdn.net/vttjs/0.14.1/vtt.min.js';\n\n      script.onload = function () {\n        /**\n         * Fired when vtt.js is loaded.\n         *\n         * @event Tech#vttjsloaded\n         * @type {EventTarget~Event}\n         */\n        _this5.trigger('vttjsloaded');\n      };\n\n      script.onerror = function () {\n        /**\n         * Fired when vtt.js was not loaded due to an error\n         *\n         * @event Tech#vttjsloaded\n         * @type {EventTarget~Event}\n         */\n        _this5.trigger('vttjserror');\n      };\n\n      this.on('dispose', function () {\n        script.onload = null;\n        script.onerror = null;\n      }); // but have not loaded yet and we set it to true before the inject so that\n      // we don't overwrite the injected window.WebVTT if it loads right away\n\n      window$1.WebVTT = true;\n      this.el().parentNode.appendChild(script);\n    } else {\n      this.ready(this.addWebVttScript_);\n    }\n  }\n  /**\n   * Emulate texttracks\n   *\n   */\n  ;\n\n  _proto.emulateTextTracks = function emulateTextTracks() {\n    var _this6 = this;\n\n    var tracks = this.textTracks();\n    var remoteTracks = this.remoteTextTracks();\n\n    var handleAddTrack = function handleAddTrack(e) {\n      return tracks.addTrack(e.track);\n    };\n\n    var handleRemoveTrack = function handleRemoveTrack(e) {\n      return tracks.removeTrack(e.track);\n    };\n\n    remoteTracks.on('addtrack', handleAddTrack);\n    remoteTracks.on('removetrack', handleRemoveTrack);\n    this.addWebVttScript_();\n\n    var updateDisplay = function updateDisplay() {\n      return _this6.trigger('texttrackchange');\n    };\n\n    var textTracksChanges = function textTracksChanges() {\n      updateDisplay();\n\n      for (var i = 0; i < tracks.length; i++) {\n        var track = tracks[i];\n        track.removeEventListener('cuechange', updateDisplay);\n\n        if (track.mode === 'showing') {\n          track.addEventListener('cuechange', updateDisplay);\n        }\n      }\n    };\n\n    textTracksChanges();\n    tracks.addEventListener('change', textTracksChanges);\n    tracks.addEventListener('addtrack', textTracksChanges);\n    tracks.addEventListener('removetrack', textTracksChanges);\n    this.on('dispose', function () {\n      remoteTracks.off('addtrack', handleAddTrack);\n      remoteTracks.off('removetrack', handleRemoveTrack);\n      tracks.removeEventListener('change', textTracksChanges);\n      tracks.removeEventListener('addtrack', textTracksChanges);\n      tracks.removeEventListener('removetrack', textTracksChanges);\n\n      for (var i = 0; i < tracks.length; i++) {\n        var track = tracks[i];\n        track.removeEventListener('cuechange', updateDisplay);\n      }\n    });\n  }\n  /**\n   * Create and returns a remote {@link TextTrack} object.\n   *\n   * @param {string} kind\n   *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata)\n   *\n   * @param {string} [label]\n   *        Label to identify the text track\n   *\n   * @param {string} [language]\n   *        Two letter language abbreviation\n   *\n   * @return {TextTrack}\n   *         The TextTrack that gets created.\n   */\n  ;\n\n  _proto.addTextTrack = function addTextTrack(kind, label, language) {\n    if (!kind) {\n      throw new Error('TextTrack kind is required but was not provided');\n    }\n\n    return createTrackHelper(this, kind, label, language);\n  }\n  /**\n   * Create an emulated TextTrack for use by addRemoteTextTrack\n   *\n   * This is intended to be overridden by classes that inherit from\n   * Tech in order to create native or custom TextTracks.\n   *\n   * @param {Object} options\n   *        The object should contain the options to initialize the TextTrack with.\n   *\n   * @param {string} [options.kind]\n   *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata).\n   *\n   * @param {string} [options.label].\n   *        Label to identify the text track\n   *\n   * @param {string} [options.language]\n   *        Two letter language abbreviation.\n   *\n   * @return {HTMLTrackElement}\n   *         The track element that gets created.\n   */\n  ;\n\n  _proto.createRemoteTextTrack = function createRemoteTextTrack(options) {\n    var track = mergeOptions$3(options, {\n      tech: this\n    });\n    return new REMOTE.remoteTextEl.TrackClass(track);\n  }\n  /**\n   * Creates a remote text track object and returns an html track element.\n   *\n   * > Note: This can be an emulated {@link HTMLTrackElement} or a native one.\n   *\n   * @param {Object} options\n   *        See {@link Tech#createRemoteTextTrack} for more detailed properties.\n   *\n   * @param {boolean} [manualCleanup=true]\n   *        - When false: the TextTrack will be automatically removed from the video\n   *          element whenever the source changes\n   *        - When True: The TextTrack will have to be cleaned up manually\n   *\n   * @return {HTMLTrackElement}\n   *         An Html Track Element.\n   *\n   * @deprecated The default functionality for this function will be equivalent\n   *             to \"manualCleanup=false\" in the future. The manualCleanup parameter will\n   *             also be removed.\n   */\n  ;\n\n  _proto.addRemoteTextTrack = function addRemoteTextTrack(options, manualCleanup) {\n    var _this7 = this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    var htmlTrackElement = this.createRemoteTextTrack(options);\n\n    if (manualCleanup !== true && manualCleanup !== false) {\n      // deprecation warning\n      log$1.warn('Calling addRemoteTextTrack without explicitly setting the \"manualCleanup\" parameter to `true` is deprecated and default to `false` in future version of video.js');\n      manualCleanup = true;\n    } // store HTMLTrackElement and TextTrack to remote list\n\n\n    this.remoteTextTrackEls().addTrackElement_(htmlTrackElement);\n    this.remoteTextTracks().addTrack(htmlTrackElement.track);\n\n    if (manualCleanup !== true) {\n      // create the TextTrackList if it doesn't exist\n      this.ready(function () {\n        return _this7.autoRemoteTextTracks_.addTrack(htmlTrackElement.track);\n      });\n    }\n\n    return htmlTrackElement;\n  }\n  /**\n   * Remove a remote text track from the remote `TextTrackList`.\n   *\n   * @param {TextTrack} track\n   *        `TextTrack` to remove from the `TextTrackList`\n   */\n  ;\n\n  _proto.removeRemoteTextTrack = function removeRemoteTextTrack(track) {\n    var trackElement = this.remoteTextTrackEls().getTrackElementByTrack_(track); // remove HTMLTrackElement and TextTrack from remote list\n\n    this.remoteTextTrackEls().removeTrackElement_(trackElement);\n    this.remoteTextTracks().removeTrack(track);\n    this.autoRemoteTextTracks_.removeTrack(track);\n  }\n  /**\n   * Gets available media playback quality metrics as specified by the W3C's Media\n   * Playback Quality API.\n   *\n   * @see [Spec]{@link https://wicg.github.io/media-playback-quality}\n   *\n   * @return {Object}\n   *         An object with supported media playback quality metrics\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.getVideoPlaybackQuality = function getVideoPlaybackQuality() {\n    return {};\n  }\n  /**\n   * Attempt to create a floating video window always on top of other windows\n   * so that users may continue consuming media while they interact with other\n   * content sites, or applications on their device.\n   *\n   * @see [Spec]{@link https://wicg.github.io/picture-in-picture}\n   *\n   * @return {Promise|undefined}\n   *         A promise with a Picture-in-Picture window if the browser supports\n   *         Promises (or one was passed in as an option). It returns undefined\n   *         otherwise.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.requestPictureInPicture = function requestPictureInPicture() {\n    var PromiseClass = this.options_.Promise || window$1.Promise;\n\n    if (PromiseClass) {\n      return PromiseClass.reject();\n    }\n  }\n  /**\n   * A method to check for the value of the 'disablePictureInPicture' <video> property.\n   * Defaults to true, as it should be considered disabled if the tech does not support pip\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.disablePictureInPicture = function disablePictureInPicture() {\n    return true;\n  }\n  /**\n   * A method to set or unset the 'disablePictureInPicture' <video> property.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.setDisablePictureInPicture = function setDisablePictureInPicture() {}\n  /**\n   * A method to set a poster from a `Tech`.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.setPoster = function setPoster() {}\n  /**\n   * A method to check for the presence of the 'playsinline' <video> attribute.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.playsinline = function playsinline() {}\n  /**\n   * A method to set or unset the 'playsinline' <video> attribute.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.setPlaysinline = function setPlaysinline() {}\n  /**\n   * Attempt to force override of native audio tracks.\n   *\n   * @param {boolean} override - If set to true native audio will be overridden,\n   * otherwise native audio will potentially be used.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.overrideNativeAudioTracks = function overrideNativeAudioTracks() {}\n  /**\n   * Attempt to force override of native video tracks.\n   *\n   * @param {boolean} override - If set to true native video will be overridden,\n   * otherwise native video will potentially be used.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.overrideNativeVideoTracks = function overrideNativeVideoTracks() {}\n  /*\n   * Check if the tech can support the given mime-type.\n   *\n   * The base tech does not support any type, but source handlers might\n   * overwrite this.\n   *\n   * @param  {string} type\n   *         The mimetype to check for support\n   *\n   * @return {string}\n   *         'probably', 'maybe', or empty string\n   *\n   * @see [Spec]{@link https://developer.mozilla.org/en-US/docs/Web/API/HTMLMediaElement/canPlayType}\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.canPlayType = function canPlayType() {\n    return '';\n  }\n  /**\n   * Check if the type is supported by this tech.\n   *\n   * The base tech does not support any type, but source handlers might\n   * overwrite this.\n   *\n   * @param {string} type\n   *        The media type to check\n   * @return {string} Returns the native video element's response\n   */\n  ;\n\n  Tech.canPlayType = function canPlayType() {\n    return '';\n  }\n  /**\n   * Check if the tech can support the given source\n   *\n   * @param {Object} srcObj\n   *        The source object\n   * @param {Object} options\n   *        The options passed to the tech\n   * @return {string} 'probably', 'maybe', or '' (empty string)\n   */\n  ;\n\n  Tech.canPlaySource = function canPlaySource(srcObj, options) {\n    return Tech.canPlayType(srcObj.type);\n  }\n  /*\n   * Return whether the argument is a Tech or not.\n   * Can be passed either a Class like `Html5` or a instance like `player.tech_`\n   *\n   * @param {Object} component\n   *        The item to check\n   *\n   * @return {boolean}\n   *         Whether it is a tech or not\n   *         - True if it is a tech\n   *         - False if it is not\n   */\n  ;\n\n  Tech.isTech = function isTech(component) {\n    return component.prototype instanceof Tech || component instanceof Tech || component === Tech;\n  }\n  /**\n   * Registers a `Tech` into a shared list for videojs.\n   *\n   * @param {string} name\n   *        Name of the `Tech` to register.\n   *\n   * @param {Object} tech\n   *        The `Tech` class to register.\n   */\n  ;\n\n  Tech.registerTech = function registerTech(name, tech) {\n    if (!Tech.techs_) {\n      Tech.techs_ = {};\n    }\n\n    if (!Tech.isTech(tech)) {\n      throw new Error(\"Tech \" + name + \" must be a Tech\");\n    }\n\n    if (!Tech.canPlayType) {\n      throw new Error('Techs must have a static canPlayType method on them');\n    }\n\n    if (!Tech.canPlaySource) {\n      throw new Error('Techs must have a static canPlaySource method on them');\n    }\n\n    name = toTitleCase$1(name);\n    Tech.techs_[name] = tech;\n    Tech.techs_[toLowerCase(name)] = tech;\n\n    if (name !== 'Tech') {\n      // camel case the techName for use in techOrder\n      Tech.defaultTechOrder_.push(name);\n    }\n\n    return tech;\n  }\n  /**\n   * Get a `Tech` from the shared list by name.\n   *\n   * @param {string} name\n   *        `camelCase` or `TitleCase` name of the Tech to get\n   *\n   * @return {Tech|undefined}\n   *         The `Tech` or undefined if there was no tech with the name requested.\n   */\n  ;\n\n  Tech.getTech = function getTech(name) {\n    if (!name) {\n      return;\n    }\n\n    if (Tech.techs_ && Tech.techs_[name]) {\n      return Tech.techs_[name];\n    }\n\n    name = toTitleCase$1(name);\n\n    if (window$1 && window$1.videojs && window$1.videojs[name]) {\n      log$1.warn(\"The \" + name + \" tech was added to the videojs object when it should be registered using videojs.registerTech(name, tech)\");\n      return window$1.videojs[name];\n    }\n  };\n\n  return Tech;\n}(Component$1);\n/**\n * Get the {@link VideoTrackList}\n *\n * @returns {VideoTrackList}\n * @method Tech.prototype.videoTracks\n */\n\n/**\n * Get the {@link AudioTrackList}\n *\n * @returns {AudioTrackList}\n * @method Tech.prototype.audioTracks\n */\n\n/**\n * Get the {@link TextTrackList}\n *\n * @returns {TextTrackList}\n * @method Tech.prototype.textTracks\n */\n\n/**\n * Get the remote element {@link TextTrackList}\n *\n * @returns {TextTrackList}\n * @method Tech.prototype.remoteTextTracks\n */\n\n/**\n * Get the remote element {@link HtmlTrackElementList}\n *\n * @returns {HtmlTrackElementList}\n * @method Tech.prototype.remoteTextTrackEls\n */\n\n\nALL.names.forEach(function (name) {\n  var props = ALL[name];\n\n  Tech.prototype[props.getterName] = function () {\n    this[props.privateName] = this[props.privateName] || new props.ListClass();\n    return this[props.privateName];\n  };\n});\n/**\n * List of associated text tracks\n *\n * @type {TextTrackList}\n * @private\n * @property Tech#textTracks_\n */\n\n/**\n * List of associated audio tracks.\n *\n * @type {AudioTrackList}\n * @private\n * @property Tech#audioTracks_\n */\n\n/**\n * List of associated video tracks.\n *\n * @type {VideoTrackList}\n * @private\n * @property Tech#videoTracks_\n */\n\n/**\n * Boolean indicating whether the `Tech` supports volume control.\n *\n * @type {boolean}\n * @default\n */\n\nTech.prototype.featuresVolumeControl = true;\n/**\n * Boolean indicating whether the `Tech` supports muting volume.\n *\n * @type {bolean}\n * @default\n */\n\nTech.prototype.featuresMuteControl = true;\n/**\n * Boolean indicating whether the `Tech` supports fullscreen resize control.\n * Resizing plugins using request fullscreen reloads the plugin\n *\n * @type {boolean}\n * @default\n */\n\nTech.prototype.featuresFullscreenResize = false;\n/**\n * Boolean indicating whether the `Tech` supports changing the speed at which the video\n * plays. Examples:\n *   - Set player to play 2x (twice) as fast\n *   - Set player to play 0.5x (half) as fast\n *\n * @type {boolean}\n * @default\n */\n\nTech.prototype.featuresPlaybackRate = false;\n/**\n * Boolean indicating whether the `Tech` supports the `progress` event. This is currently\n * not triggered by video-js-swf. This will be used to determine if\n * {@link Tech#manualProgressOn} should be called.\n *\n * @type {boolean}\n * @default\n */\n\nTech.prototype.featuresProgressEvents = false;\n/**\n * Boolean indicating whether the `Tech` supports the `sourceset` event.\n *\n * A tech should set this to `true` and then use {@link Tech#triggerSourceset}\n * to trigger a {@link Tech#event:sourceset} at the earliest time after getting\n * a new source.\n *\n * @type {boolean}\n * @default\n */\n\nTech.prototype.featuresSourceset = false;\n/**\n * Boolean indicating whether the `Tech` supports the `timeupdate` event. This is currently\n * not triggered by video-js-swf. This will be used to determine if\n * {@link Tech#manualTimeUpdates} should be called.\n *\n * @type {boolean}\n * @default\n */\n\nTech.prototype.featuresTimeupdateEvents = false;\n/**\n * Boolean indicating whether the `Tech` supports the native `TextTrack`s.\n * This will help us integrate with native `TextTrack`s if the browser supports them.\n *\n * @type {boolean}\n * @default\n */\n\nTech.prototype.featuresNativeTextTracks = false;\n/**\n * A functional mixin for techs that want to use the Source Handler pattern.\n * Source handlers are scripts for handling specific formats.\n * The source handler pattern is used for adaptive formats (HLS, DASH) that\n * manually load video data and feed it into a Source Buffer (Media Source Extensions)\n * Example: `Tech.withSourceHandlers.call(MyTech);`\n *\n * @param {Tech} _Tech\n *        The tech to add source handler functions to.\n *\n * @mixes Tech~SourceHandlerAdditions\n */\n\nTech.withSourceHandlers = function (_Tech) {\n  /**\n   * Register a source handler\n   *\n   * @param {Function} handler\n   *        The source handler class\n   *\n   * @param {number} [index]\n   *        Register it at the following index\n   */\n  _Tech.registerSourceHandler = function (handler, index) {\n    var handlers = _Tech.sourceHandlers;\n\n    if (!handlers) {\n      handlers = _Tech.sourceHandlers = [];\n    }\n\n    if (index === undefined) {\n      // add to the end of the list\n      index = handlers.length;\n    }\n\n    handlers.splice(index, 0, handler);\n  };\n  /**\n   * Check if the tech can support the given type. Also checks the\n   * Techs sourceHandlers.\n   *\n   * @param {string} type\n   *         The mimetype to check.\n   *\n   * @return {string}\n   *         'probably', 'maybe', or '' (empty string)\n   */\n\n\n  _Tech.canPlayType = function (type) {\n    var handlers = _Tech.sourceHandlers || [];\n    var can;\n\n    for (var i = 0; i < handlers.length; i++) {\n      can = handlers[i].canPlayType(type);\n\n      if (can) {\n        return can;\n      }\n    }\n\n    return '';\n  };\n  /**\n   * Returns the first source handler that supports the source.\n   *\n   * TODO: Answer question: should 'probably' be prioritized over 'maybe'\n   *\n   * @param {Tech~SourceObject} source\n   *        The source object\n   *\n   * @param {Object} options\n   *        The options passed to the tech\n   *\n   * @return {SourceHandler|null}\n   *          The first source handler that supports the source or null if\n   *          no SourceHandler supports the source\n   */\n\n\n  _Tech.selectSourceHandler = function (source, options) {\n    var handlers = _Tech.sourceHandlers || [];\n    var can;\n\n    for (var i = 0; i < handlers.length; i++) {\n      can = handlers[i].canHandleSource(source, options);\n\n      if (can) {\n        return handlers[i];\n      }\n    }\n\n    return null;\n  };\n  /**\n   * Check if the tech can support the given source.\n   *\n   * @param {Tech~SourceObject} srcObj\n   *        The source object\n   *\n   * @param {Object} options\n   *        The options passed to the tech\n   *\n   * @return {string}\n   *         'probably', 'maybe', or '' (empty string)\n   */\n\n\n  _Tech.canPlaySource = function (srcObj, options) {\n    var sh = _Tech.selectSourceHandler(srcObj, options);\n\n    if (sh) {\n      return sh.canHandleSource(srcObj, options);\n    }\n\n    return '';\n  };\n  /**\n   * When using a source handler, prefer its implementation of\n   * any function normally provided by the tech.\n   */\n\n\n  var deferrable = ['seekable', 'seeking', 'duration'];\n  /**\n   * A wrapper around {@link Tech#seekable} that will call a `SourceHandler`s seekable\n   * function if it exists, with a fallback to the Techs seekable function.\n   *\n   * @method _Tech.seekable\n   */\n\n  /**\n   * A wrapper around {@link Tech#duration} that will call a `SourceHandler`s duration\n   * function if it exists, otherwise it will fallback to the techs duration function.\n   *\n   * @method _Tech.duration\n   */\n\n  deferrable.forEach(function (fnName) {\n    var originalFn = this[fnName];\n\n    if (typeof originalFn !== 'function') {\n      return;\n    }\n\n    this[fnName] = function () {\n      if (this.sourceHandler_ && this.sourceHandler_[fnName]) {\n        return this.sourceHandler_[fnName].apply(this.sourceHandler_, arguments);\n      }\n\n      return originalFn.apply(this, arguments);\n    };\n  }, _Tech.prototype);\n  /**\n   * Create a function for setting the source using a source object\n   * and source handlers.\n   * Should never be called unless a source handler was found.\n   *\n   * @param {Tech~SourceObject} source\n   *        A source object with src and type keys\n   */\n\n  _Tech.prototype.setSource = function (source) {\n    var sh = _Tech.selectSourceHandler(source, this.options_);\n\n    if (!sh) {\n      // Fall back to a native source hander when unsupported sources are\n      // deliberately set\n      if (_Tech.nativeSourceHandler) {\n        sh = _Tech.nativeSourceHandler;\n      } else {\n        log$1.error('No source handler found for the current source.');\n      }\n    } // Dispose any existing source handler\n\n\n    this.disposeSourceHandler();\n    this.off('dispose', this.disposeSourceHandler_);\n\n    if (sh !== _Tech.nativeSourceHandler) {\n      this.currentSource_ = source;\n    }\n\n    this.sourceHandler_ = sh.handleSource(source, this, this.options_);\n    this.one('dispose', this.disposeSourceHandler_);\n  };\n  /**\n   * Clean up any existing SourceHandlers and listeners when the Tech is disposed.\n   *\n   * @listens Tech#dispose\n   */\n\n\n  _Tech.prototype.disposeSourceHandler = function () {\n    // if we have a source and get another one\n    // then we are loading something new\n    // than clear all of our current tracks\n    if (this.currentSource_) {\n      this.clearTracks(['audio', 'video']);\n      this.currentSource_ = null;\n    } // always clean up auto-text tracks\n\n\n    this.cleanupAutoTextTracks();\n\n    if (this.sourceHandler_) {\n      if (this.sourceHandler_.dispose) {\n        this.sourceHandler_.dispose();\n      }\n\n      this.sourceHandler_ = null;\n    }\n  };\n}; // The base Tech class needs to be registered as a Component. It is the only\n// Tech that can be registered as a Component.\n\n\nComponent$1.registerComponent('Tech', Tech);\nTech.registerTech('Tech', Tech);\n/**\n * A list of techs that should be added to techOrder on Players\n *\n * @private\n */\n\nTech.defaultTechOrder_ = [];\n\n/**\n * @file middleware.js\n * @module middleware\n */\nvar middlewares = {};\nvar middlewareInstances = {};\nvar TERMINATOR = {};\n/**\n * A middleware object is a plain JavaScript object that has methods that\n * match the {@link Tech} methods found in the lists of allowed\n * {@link module:middleware.allowedGetters|getters},\n * {@link module:middleware.allowedSetters|setters}, and\n * {@link module:middleware.allowedMediators|mediators}.\n *\n * @typedef {Object} MiddlewareObject\n */\n\n/**\n * A middleware factory function that should return a\n * {@link module:middleware~MiddlewareObject|MiddlewareObject}.\n *\n * This factory will be called for each player when needed, with the player\n * passed in as an argument.\n *\n * @callback MiddlewareFactory\n * @param {Player} player\n *        A Video.js player.\n */\n\n/**\n * Define a middleware that the player should use by way of a factory function\n * that returns a middleware object.\n *\n * @param  {string} type\n *         The MIME type to match or `\"*\"` for all MIME types.\n *\n * @param  {MiddlewareFactory} middleware\n *         A middleware factory function that will be executed for\n *         matching types.\n */\n\nfunction use(type, middleware) {\n  middlewares[type] = middlewares[type] || [];\n  middlewares[type].push(middleware);\n}\n/**\n * Asynchronously sets a source using middleware by recursing through any\n * matching middlewares and calling `setSource` on each, passing along the\n * previous returned value each time.\n *\n * @param  {Player} player\n *         A {@link Player} instance.\n *\n * @param  {Tech~SourceObject} src\n *         A source object.\n *\n * @param  {Function}\n *         The next middleware to run.\n */\n\nfunction setSource(player, src, next) {\n  player.setTimeout(function () {\n    return setSourceHelper(src, middlewares[src.type], next, player);\n  }, 1);\n}\n/**\n * When the tech is set, passes the tech to each middleware's `setTech` method.\n *\n * @param {Object[]} middleware\n *        An array of middleware instances.\n *\n * @param {Tech} tech\n *        A Video.js tech.\n */\n\nfunction setTech(middleware, tech) {\n  middleware.forEach(function (mw) {\n    return mw.setTech && mw.setTech(tech);\n  });\n}\n/**\n * Calls a getter on the tech first, through each middleware\n * from right to left to the player.\n *\n * @param  {Object[]} middleware\n *         An array of middleware instances.\n *\n * @param  {Tech} tech\n *         The current tech.\n *\n * @param  {string} method\n *         A method name.\n *\n * @return {Mixed}\n *         The final value from the tech after middleware has intercepted it.\n */\n\nfunction get(middleware, tech, method) {\n  return middleware.reduceRight(middlewareIterator(method), tech[method]());\n}\n/**\n * Takes the argument given to the player and calls the setter method on each\n * middleware from left to right to the tech.\n *\n * @param  {Object[]} middleware\n *         An array of middleware instances.\n *\n * @param  {Tech} tech\n *         The current tech.\n *\n * @param  {string} method\n *         A method name.\n *\n * @param  {Mixed} arg\n *         The value to set on the tech.\n *\n * @return {Mixed}\n *         The return value of the `method` of the `tech`.\n */\n\nfunction set(middleware, tech, method, arg) {\n  return tech[method](middleware.reduce(middlewareIterator(method), arg));\n}\n/**\n * Takes the argument given to the player and calls the `call` version of the\n * method on each middleware from left to right.\n *\n * Then, call the passed in method on the tech and return the result unchanged\n * back to the player, through middleware, this time from right to left.\n *\n * @param  {Object[]} middleware\n *         An array of middleware instances.\n *\n * @param  {Tech} tech\n *         The current tech.\n *\n * @param  {string} method\n *         A method name.\n *\n * @param  {Mixed} arg\n *         The value to set on the tech.\n *\n * @return {Mixed}\n *         The return value of the `method` of the `tech`, regardless of the\n *         return values of middlewares.\n */\n\nfunction mediate(middleware, tech, method, arg) {\n  if (arg === void 0) {\n    arg = null;\n  }\n\n  var callMethod = 'call' + toTitleCase$1(method);\n  var middlewareValue = middleware.reduce(middlewareIterator(callMethod), arg);\n  var terminated = middlewareValue === TERMINATOR; // deprecated. The `null` return value should instead return TERMINATOR to\n  // prevent confusion if a techs method actually returns null.\n\n  var returnValue = terminated ? null : tech[method](middlewareValue);\n  executeRight(middleware, method, returnValue, terminated);\n  return returnValue;\n}\n/**\n * Enumeration of allowed getters where the keys are method names.\n *\n * @type {Object}\n */\n\nvar allowedGetters = {\n  buffered: 1,\n  currentTime: 1,\n  duration: 1,\n  muted: 1,\n  played: 1,\n  paused: 1,\n  seekable: 1,\n  volume: 1,\n  ended: 1\n};\n/**\n * Enumeration of allowed setters where the keys are method names.\n *\n * @type {Object}\n */\n\nvar allowedSetters = {\n  setCurrentTime: 1,\n  setMuted: 1,\n  setVolume: 1\n};\n/**\n * Enumeration of allowed mediators where the keys are method names.\n *\n * @type {Object}\n */\n\nvar allowedMediators = {\n  play: 1,\n  pause: 1\n};\n\nfunction middlewareIterator(method) {\n  return function (value, mw) {\n    // if the previous middleware terminated, pass along the termination\n    if (value === TERMINATOR) {\n      return TERMINATOR;\n    }\n\n    if (mw[method]) {\n      return mw[method](value);\n    }\n\n    return value;\n  };\n}\n\nfunction executeRight(mws, method, value, terminated) {\n  for (var i = mws.length - 1; i >= 0; i--) {\n    var mw = mws[i];\n\n    if (mw[method]) {\n      mw[method](terminated, value);\n    }\n  }\n}\n/**\n * Clear the middleware cache for a player.\n *\n * @param  {Player} player\n *         A {@link Player} instance.\n */\n\n\nfunction clearCacheForPlayer(player) {\n  middlewareInstances[player.id()] = null;\n}\n/**\n * {\n *  [playerId]: [[mwFactory, mwInstance], ...]\n * }\n *\n * @private\n */\n\nfunction getOrCreateFactory(player, mwFactory) {\n  var mws = middlewareInstances[player.id()];\n  var mw = null;\n\n  if (mws === undefined || mws === null) {\n    mw = mwFactory(player);\n    middlewareInstances[player.id()] = [[mwFactory, mw]];\n    return mw;\n  }\n\n  for (var i = 0; i < mws.length; i++) {\n    var _mws$i = mws[i],\n        mwf = _mws$i[0],\n        mwi = _mws$i[1];\n\n    if (mwf !== mwFactory) {\n      continue;\n    }\n\n    mw = mwi;\n  }\n\n  if (mw === null) {\n    mw = mwFactory(player);\n    mws.push([mwFactory, mw]);\n  }\n\n  return mw;\n}\n\nfunction setSourceHelper(src, middleware, next, player, acc, lastRun) {\n  if (src === void 0) {\n    src = {};\n  }\n\n  if (middleware === void 0) {\n    middleware = [];\n  }\n\n  if (acc === void 0) {\n    acc = [];\n  }\n\n  if (lastRun === void 0) {\n    lastRun = false;\n  }\n\n  var _middleware = middleware,\n      mwFactory = _middleware[0],\n      mwrest = _middleware.slice(1); // if mwFactory is a string, then we're at a fork in the road\n\n\n  if (typeof mwFactory === 'string') {\n    setSourceHelper(src, middlewares[mwFactory], next, player, acc, lastRun); // if we have an mwFactory, call it with the player to get the mw,\n    // then call the mw's setSource method\n  } else if (mwFactory) {\n    var mw = getOrCreateFactory(player, mwFactory); // if setSource isn't present, implicitly select this middleware\n\n    if (!mw.setSource) {\n      acc.push(mw);\n      return setSourceHelper(src, mwrest, next, player, acc, lastRun);\n    }\n\n    mw.setSource(assign({}, src), function (err, _src) {\n      // something happened, try the next middleware on the current level\n      // make sure to use the old src\n      if (err) {\n        return setSourceHelper(src, mwrest, next, player, acc, lastRun);\n      } // we've succeeded, now we need to go deeper\n\n\n      acc.push(mw); // if it's the same type, continue down the current chain\n      // otherwise, we want to go down the new chain\n\n      setSourceHelper(_src, src.type === _src.type ? mwrest : middlewares[_src.type], next, player, acc, lastRun);\n    });\n  } else if (mwrest.length) {\n    setSourceHelper(src, mwrest, next, player, acc, lastRun);\n  } else if (lastRun) {\n    next(src, acc);\n  } else {\n    setSourceHelper(src, middlewares['*'], next, player, acc, true);\n  }\n}\n\n/**\n * Mimetypes\n *\n * @see http://hul.harvard.edu/ois/////systems/wax/wax-public-help/mimetypes.htm\n * @typedef Mimetypes~Kind\n * @enum\n */\n\nvar MimetypesKind = {\n  opus: 'video/ogg',\n  ogv: 'video/ogg',\n  mp4: 'video/mp4',\n  mov: 'video/mp4',\n  m4v: 'video/mp4',\n  mkv: 'video/x-matroska',\n  m4a: 'audio/mp4',\n  mp3: 'audio/mpeg',\n  aac: 'audio/aac',\n  caf: 'audio/x-caf',\n  flac: 'audio/flac',\n  oga: 'audio/ogg',\n  wav: 'audio/wav',\n  m3u8: 'application/x-mpegURL',\n  jpg: 'image/jpeg',\n  jpeg: 'image/jpeg',\n  gif: 'image/gif',\n  png: 'image/png',\n  svg: 'image/svg+xml',\n  webp: 'image/webp'\n};\n/**\n * Get the mimetype of a given src url if possible\n *\n * @param {string} src\n *        The url to the src\n *\n * @return {string}\n *         return the mimetype if it was known or empty string otherwise\n */\n\nvar getMimetype = function getMimetype(src) {\n  if (src === void 0) {\n    src = '';\n  }\n\n  var ext = getFileExtension(src);\n  var mimetype = MimetypesKind[ext.toLowerCase()];\n  return mimetype || '';\n};\n/**\n * Find the mime type of a given source string if possible. Uses the player\n * source cache.\n *\n * @param {Player} player\n *        The player object\n *\n * @param {string} src\n *        The source string\n *\n * @return {string}\n *         The type that was found\n */\n\nvar findMimetype = function findMimetype(player, src) {\n  if (!src) {\n    return '';\n  } // 1. check for the type in the `source` cache\n\n\n  if (player.cache_.source.src === src && player.cache_.source.type) {\n    return player.cache_.source.type;\n  } // 2. see if we have this source in our `currentSources` cache\n\n\n  var matchingSources = player.cache_.sources.filter(function (s) {\n    return s.src === src;\n  });\n\n  if (matchingSources.length) {\n    return matchingSources[0].type;\n  } // 3. look for the src url in source elements and use the type there\n\n\n  var sources = player.$$('source');\n\n  for (var i = 0; i < sources.length; i++) {\n    var s = sources[i];\n\n    if (s.type && s.src && s.src === src) {\n      return s.type;\n    }\n  } // 4. finally fallback to our list of mime types based on src url extension\n\n\n  return getMimetype(src);\n};\n\n/**\n * @module filter-source\n */\n/**\n * Filter out single bad source objects or multiple source objects in an\n * array. Also flattens nested source object arrays into a 1 dimensional\n * array of source objects.\n *\n * @param {Tech~SourceObject|Tech~SourceObject[]} src\n *        The src object to filter\n *\n * @return {Tech~SourceObject[]}\n *         An array of sourceobjects containing only valid sources\n *\n * @private\n */\n\nvar filterSource = function filterSource(src) {\n  // traverse array\n  if (Array.isArray(src)) {\n    var newsrc = [];\n    src.forEach(function (srcobj) {\n      srcobj = filterSource(srcobj);\n\n      if (Array.isArray(srcobj)) {\n        newsrc = newsrc.concat(srcobj);\n      } else if (isObject(srcobj)) {\n        newsrc.push(srcobj);\n      }\n    });\n    src = newsrc;\n  } else if (typeof src === 'string' && src.trim()) {\n    // convert string into object\n    src = [fixSource({\n      src: src\n    })];\n  } else if (isObject(src) && typeof src.src === 'string' && src.src && src.src.trim()) {\n    // src is already valid\n    src = [fixSource(src)];\n  } else {\n    // invalid source, turn it into an empty array\n    src = [];\n  }\n\n  return src;\n};\n/**\n * Checks src mimetype, adding it when possible\n *\n * @param {Tech~SourceObject} src\n *        The src object to check\n * @return {Tech~SourceObject}\n *        src Object with known type\n */\n\n\nfunction fixSource(src) {\n  if (!src.type) {\n    var mimetype = getMimetype(src.src);\n\n    if (mimetype) {\n      src.type = mimetype;\n    }\n  }\n\n  return src;\n}\n\n/**\n * The `MediaLoader` is the `Component` that decides which playback technology to load\n * when a player is initialized.\n *\n * @extends Component\n */\n\nvar MediaLoader = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(MediaLoader, _Component);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should attach to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function that is run when this component is ready.\n   */\n  function MediaLoader(player, options, ready) {\n    var _this;\n\n    // MediaLoader has no element\n    var options_ = mergeOptions$3({\n      createEl: false\n    }, options);\n    _this = _Component.call(this, player, options_, ready) || this; // If there are no sources when the player is initialized,\n    // load the first supported playback technology.\n\n    if (!options.playerOptions.sources || options.playerOptions.sources.length === 0) {\n      for (var i = 0, j = options.playerOptions.techOrder; i < j.length; i++) {\n        var techName = toTitleCase$1(j[i]);\n        var tech = Tech.getTech(techName); // Support old behavior of techs being registered as components.\n        // Remove once that deprecated behavior is removed.\n\n        if (!techName) {\n          tech = Component$1.getComponent(techName);\n        } // Check if the browser supports this technology\n\n\n        if (tech && tech.isSupported()) {\n          player.loadTech_(techName);\n          break;\n        }\n      }\n    } else {\n      // Loop through playback technologies (e.g. HTML5) and check for support.\n      // Then load the best source.\n      // A few assumptions here:\n      //   All playback technologies respect preload false.\n      player.src(options.playerOptions.sources);\n    }\n\n    return _this;\n  }\n\n  return MediaLoader;\n}(Component$1);\n\nComponent$1.registerComponent('MediaLoader', MediaLoader);\n\n/**\n * Component which is clickable or keyboard actionable, but is not a\n * native HTML button.\n *\n * @extends Component\n */\n\nvar ClickableComponent = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(ClickableComponent, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param  {Player} player\n   *         The `Player` that this class should be attached to.\n   *\n   * @param  {Object} [options]\n   *         The key/value store of player options.\n   *\n   * @param  {function} [options.clickHandler]\n   *         The function to call when the button is clicked / activated\n   */\n  function ClickableComponent(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n\n    _this.handleMouseOver_ = function (e) {\n      return _this.handleMouseOver(e);\n    };\n\n    _this.handleMouseOut_ = function (e) {\n      return _this.handleMouseOut(e);\n    };\n\n    _this.handleClick_ = function (e) {\n      return _this.handleClick(e);\n    };\n\n    _this.handleKeyDown_ = function (e) {\n      return _this.handleKeyDown(e);\n    };\n\n    _this.emitTapEvents();\n\n    _this.enable();\n\n    return _this;\n  }\n  /**\n   * Create the `ClickableComponent`s DOM element.\n   *\n   * @param {string} [tag=div]\n   *        The element's node type.\n   *\n   * @param {Object} [props={}]\n   *        An object of properties that should be set on the element.\n   *\n   * @param {Object} [attributes={}]\n   *        An object of attributes that should be set on the element.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n\n\n  var _proto = ClickableComponent.prototype;\n\n  _proto.createEl = function createEl$1(tag, props, attributes) {\n    if (tag === void 0) {\n      tag = 'div';\n    }\n\n    if (props === void 0) {\n      props = {};\n    }\n\n    if (attributes === void 0) {\n      attributes = {};\n    }\n\n    props = assign({\n      className: this.buildCSSClass(),\n      tabIndex: 0\n    }, props);\n\n    if (tag === 'button') {\n      log$1.error(\"Creating a ClickableComponent with an HTML element of \" + tag + \" is not supported; use a Button instead.\");\n    } // Add ARIA attributes for clickable element which is not a native HTML button\n\n\n    attributes = assign({\n      role: 'button'\n    }, attributes);\n    this.tabIndex_ = props.tabIndex;\n    var el = createEl(tag, props, attributes);\n    el.appendChild(createEl('span', {\n      className: 'vjs-icon-placeholder'\n    }, {\n      'aria-hidden': true\n    }));\n    this.createControlTextEl(el);\n    return el;\n  };\n\n  _proto.dispose = function dispose() {\n    // remove controlTextEl_ on dispose\n    this.controlTextEl_ = null;\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Create a control text element on this `ClickableComponent`\n   *\n   * @param {Element} [el]\n   *        Parent element for the control text.\n   *\n   * @return {Element}\n   *         The control text element that gets created.\n   */\n  ;\n\n  _proto.createControlTextEl = function createControlTextEl(el) {\n    this.controlTextEl_ = createEl('span', {\n      className: 'vjs-control-text'\n    }, {\n      // let the screen reader user know that the text of the element may change\n      'aria-live': 'polite'\n    });\n\n    if (el) {\n      el.appendChild(this.controlTextEl_);\n    }\n\n    this.controlText(this.controlText_, el);\n    return this.controlTextEl_;\n  }\n  /**\n   * Get or set the localize text to use for the controls on the `ClickableComponent`.\n   *\n   * @param {string} [text]\n   *        Control text for element.\n   *\n   * @param {Element} [el=this.el()]\n   *        Element to set the title on.\n   *\n   * @return {string}\n   *         - The control text when getting\n   */\n  ;\n\n  _proto.controlText = function controlText(text, el) {\n    if (el === void 0) {\n      el = this.el();\n    }\n\n    if (text === undefined) {\n      return this.controlText_ || 'Need Text';\n    }\n\n    var localizedText = this.localize(text);\n    this.controlText_ = text;\n    textContent(this.controlTextEl_, localizedText);\n\n    if (!this.nonIconControl && !this.player_.options_.noUITitleAttributes) {\n      // Set title attribute if only an icon is shown\n      el.setAttribute('title', localizedText);\n    }\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n  ;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-control vjs-button \" + _Component.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Enable this `ClickableComponent`\n   */\n  ;\n\n  _proto.enable = function enable() {\n    if (!this.enabled_) {\n      this.enabled_ = true;\n      this.removeClass('vjs-disabled');\n      this.el_.setAttribute('aria-disabled', 'false');\n\n      if (typeof this.tabIndex_ !== 'undefined') {\n        this.el_.setAttribute('tabIndex', this.tabIndex_);\n      }\n\n      this.on(['tap', 'click'], this.handleClick_);\n      this.on('keydown', this.handleKeyDown_);\n    }\n  }\n  /**\n   * Disable this `ClickableComponent`\n   */\n  ;\n\n  _proto.disable = function disable() {\n    this.enabled_ = false;\n    this.addClass('vjs-disabled');\n    this.el_.setAttribute('aria-disabled', 'true');\n\n    if (typeof this.tabIndex_ !== 'undefined') {\n      this.el_.removeAttribute('tabIndex');\n    }\n\n    this.off('mouseover', this.handleMouseOver_);\n    this.off('mouseout', this.handleMouseOut_);\n    this.off(['tap', 'click'], this.handleClick_);\n    this.off('keydown', this.handleKeyDown_);\n  }\n  /**\n   * Handles language change in ClickableComponent for the player in components\n   *\n   *\n   */\n  ;\n\n  _proto.handleLanguagechange = function handleLanguagechange() {\n    this.controlText(this.controlText_);\n  }\n  /**\n   * Event handler that is called when a `ClickableComponent` receives a\n   * `click` or `tap` event.\n   *\n   * @param {EventTarget~Event} event\n   *        The `tap` or `click` event that caused this function to be called.\n   *\n   * @listens tap\n   * @listens click\n   * @abstract\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    if (this.options_.clickHandler) {\n      this.options_.clickHandler.call(this, arguments);\n    }\n  }\n  /**\n   * Event handler that is called when a `ClickableComponent` receives a\n   * `keydown` event.\n   *\n   * By default, if the key is Space or Enter, it will trigger a `click` event.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    // Support Space or Enter key operation to fire a click event. Also,\n    // prevent the event from propagating through the DOM and triggering\n    // Player hotkeys.\n    if (keycode.isEventKey(event, 'Space') || keycode.isEventKey(event, 'Enter')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.trigger('click');\n    } else {\n      // Pass keypress handling up for unsupported keys\n      _Component.prototype.handleKeyDown.call(this, event);\n    }\n  };\n\n  return ClickableComponent;\n}(Component$1);\n\nComponent$1.registerComponent('ClickableComponent', ClickableComponent);\n\n/**\n * A `ClickableComponent` that handles showing the poster image for the player.\n *\n * @extends ClickableComponent\n */\n\nvar PosterImage = /*#__PURE__*/function (_ClickableComponent) {\n  _inheritsLoose(PosterImage, _ClickableComponent);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should attach to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function PosterImage(player, options) {\n    var _this;\n\n    _this = _ClickableComponent.call(this, player, options) || this;\n\n    _this.update();\n\n    _this.update_ = function (e) {\n      return _this.update(e);\n    };\n\n    player.on('posterchange', _this.update_);\n    return _this;\n  }\n  /**\n   * Clean up and dispose of the `PosterImage`.\n   */\n\n\n  var _proto = PosterImage.prototype;\n\n  _proto.dispose = function dispose() {\n    this.player().off('posterchange', this.update_);\n\n    _ClickableComponent.prototype.dispose.call(this);\n  }\n  /**\n   * Create the `PosterImage`s DOM element.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n  ;\n\n  _proto.createEl = function createEl$1() {\n    var el = createEl('div', {\n      className: 'vjs-poster',\n      // Don't want poster to be tabbable.\n      tabIndex: -1\n    });\n    return el;\n  }\n  /**\n   * An {@link EventTarget~EventListener} for {@link Player#posterchange} events.\n   *\n   * @listens Player#posterchange\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `Player#posterchange` event that triggered this function.\n   */\n  ;\n\n  _proto.update = function update(event) {\n    var url = this.player().poster();\n    this.setSrc(url); // If there's no poster source we should display:none on this component\n    // so it's not still clickable or right-clickable\n\n    if (url) {\n      this.show();\n    } else {\n      this.hide();\n    }\n  }\n  /**\n   * Set the source of the `PosterImage` depending on the display method.\n   *\n   * @param {string} url\n   *        The URL to the source for the `PosterImage`.\n   */\n  ;\n\n  _proto.setSrc = function setSrc(url) {\n    var backgroundImage = ''; // Any falsy value should stay as an empty string, otherwise\n    // this will throw an extra error\n\n    if (url) {\n      backgroundImage = \"url(\\\"\" + url + \"\\\")\";\n    }\n\n    this.el_.style.backgroundImage = backgroundImage;\n  }\n  /**\n   * An {@link EventTarget~EventListener} for clicks on the `PosterImage`. See\n   * {@link ClickableComponent#handleClick} for instances where this will be triggered.\n   *\n   * @listens tap\n   * @listens click\n   * @listens keydown\n   *\n   * @param {EventTarget~Event} event\n   +        The `click`, `tap` or `keydown` event that caused this function to be called.\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    // We don't want a click to trigger playback when controls are disabled\n    if (!this.player_.controls()) {\n      return;\n    }\n\n    var sourceIsEncrypted = this.player_.usingPlugin('eme') && this.player_.eme.sessions && this.player_.eme.sessions.length > 0;\n\n    if (this.player_.tech(true) && // We've observed a bug in IE and Edge when playing back DRM content where\n    // calling .focus() on the video element causes the video to go black,\n    // so we avoid it in that specific case\n    !((IE_VERSION || IS_EDGE) && sourceIsEncrypted)) {\n      this.player_.tech(true).focus();\n    }\n\n    if (this.player_.paused()) {\n      silencePromise(this.player_.play());\n    } else {\n      this.player_.pause();\n    }\n  };\n\n  return PosterImage;\n}(ClickableComponent);\n\nComponent$1.registerComponent('PosterImage', PosterImage);\n\nvar darkGray = '#222';\nvar lightGray = '#ccc';\nvar fontMap = {\n  monospace: 'monospace',\n  sansSerif: 'sans-serif',\n  serif: 'serif',\n  monospaceSansSerif: '\"Andale Mono\", \"Lucida Console\", monospace',\n  monospaceSerif: '\"Courier New\", monospace',\n  proportionalSansSerif: 'sans-serif',\n  proportionalSerif: 'serif',\n  casual: '\"Comic Sans MS\", Impact, fantasy',\n  script: '\"Monotype Corsiva\", cursive',\n  smallcaps: '\"Andale Mono\", \"Lucida Console\", monospace, sans-serif'\n};\n/**\n * Construct an rgba color from a given hex color code.\n *\n * @param {number} color\n *        Hex number for color, like #f0e or #f604e2.\n *\n * @param {number} opacity\n *        Value for opacity, 0.0 - 1.0.\n *\n * @return {string}\n *         The rgba color that was created, like 'rgba(255, 0, 0, 0.3)'.\n */\n\nfunction constructColor(color, opacity) {\n  var hex;\n\n  if (color.length === 4) {\n    // color looks like \"#f0e\"\n    hex = color[1] + color[1] + color[2] + color[2] + color[3] + color[3];\n  } else if (color.length === 7) {\n    // color looks like \"#f604e2\"\n    hex = color.slice(1);\n  } else {\n    throw new Error('Invalid color code provided, ' + color + '; must be formatted as e.g. #f0e or #f604e2.');\n  }\n\n  return 'rgba(' + parseInt(hex.slice(0, 2), 16) + ',' + parseInt(hex.slice(2, 4), 16) + ',' + parseInt(hex.slice(4, 6), 16) + ',' + opacity + ')';\n}\n/**\n * Try to update the style of a DOM element. Some style changes will throw an error,\n * particularly in IE8. Those should be noops.\n *\n * @param {Element} el\n *        The DOM element to be styled.\n *\n * @param {string} style\n *        The CSS property on the element that should be styled.\n *\n * @param {string} rule\n *        The style rule that should be applied to the property.\n *\n * @private\n */\n\nfunction tryUpdateStyle(el, style, rule) {\n  try {\n    el.style[style] = rule;\n  } catch (e) {\n    // Satisfies linter.\n    return;\n  }\n}\n/**\n * The component for displaying text track cues.\n *\n * @extends Component\n */\n\n\nvar TextTrackDisplay = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(TextTrackDisplay, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function to call when `TextTrackDisplay` is ready.\n   */\n  function TextTrackDisplay(player, options, ready) {\n    var _this;\n\n    _this = _Component.call(this, player, options, ready) || this;\n\n    var updateDisplayHandler = function updateDisplayHandler(e) {\n      return _this.updateDisplay(e);\n    };\n\n    player.on('loadstart', function (e) {\n      return _this.toggleDisplay(e);\n    });\n    player.on('texttrackchange', updateDisplayHandler);\n    player.on('loadedmetadata', function (e) {\n      return _this.preselectTrack(e);\n    }); // This used to be called during player init, but was causing an error\n    // if a track should show by default and the display hadn't loaded yet.\n    // Should probably be moved to an external track loader when we support\n    // tracks that don't need a display.\n\n    player.ready(bind(_assertThisInitialized(_this), function () {\n      if (player.tech_ && player.tech_.featuresNativeTextTracks) {\n        this.hide();\n        return;\n      }\n\n      player.on('fullscreenchange', updateDisplayHandler);\n      player.on('playerresize', updateDisplayHandler);\n      window$1.addEventListener('orientationchange', updateDisplayHandler);\n      player.on('dispose', function () {\n        return window$1.removeEventListener('orientationchange', updateDisplayHandler);\n      });\n      var tracks = this.options_.playerOptions.tracks || [];\n\n      for (var i = 0; i < tracks.length; i++) {\n        this.player_.addRemoteTextTrack(tracks[i], true);\n      }\n\n      this.preselectTrack();\n    }));\n    return _this;\n  }\n  /**\n  * Preselect a track following this precedence:\n  * - matches the previously selected {@link TextTrack}'s language and kind\n  * - matches the previously selected {@link TextTrack}'s language only\n  * - is the first default captions track\n  * - is the first default descriptions track\n  *\n  * @listens Player#loadstart\n  */\n\n\n  var _proto = TextTrackDisplay.prototype;\n\n  _proto.preselectTrack = function preselectTrack() {\n    var modes = {\n      captions: 1,\n      subtitles: 1\n    };\n    var trackList = this.player_.textTracks();\n    var userPref = this.player_.cache_.selectedLanguage;\n    var firstDesc;\n    var firstCaptions;\n    var preferredTrack;\n\n    for (var i = 0; i < trackList.length; i++) {\n      var track = trackList[i];\n\n      if (userPref && userPref.enabled && userPref.language && userPref.language === track.language && track.kind in modes) {\n        // Always choose the track that matches both language and kind\n        if (track.kind === userPref.kind) {\n          preferredTrack = track; // or choose the first track that matches language\n        } else if (!preferredTrack) {\n          preferredTrack = track;\n        } // clear everything if offTextTrackMenuItem was clicked\n\n      } else if (userPref && !userPref.enabled) {\n        preferredTrack = null;\n        firstDesc = null;\n        firstCaptions = null;\n      } else if (track[\"default\"]) {\n        if (track.kind === 'descriptions' && !firstDesc) {\n          firstDesc = track;\n        } else if (track.kind in modes && !firstCaptions) {\n          firstCaptions = track;\n        }\n      }\n    } // The preferredTrack matches the user preference and takes\n    // precedence over all the other tracks.\n    // So, display the preferredTrack before the first default track\n    // and the subtitles/captions track before the descriptions track\n\n\n    if (preferredTrack) {\n      preferredTrack.mode = 'showing';\n    } else if (firstCaptions) {\n      firstCaptions.mode = 'showing';\n    } else if (firstDesc) {\n      firstDesc.mode = 'showing';\n    }\n  }\n  /**\n   * Turn display of {@link TextTrack}'s from the current state into the other state.\n   * There are only two states:\n   * - 'shown'\n   * - 'hidden'\n   *\n   * @listens Player#loadstart\n   */\n  ;\n\n  _proto.toggleDisplay = function toggleDisplay() {\n    if (this.player_.tech_ && this.player_.tech_.featuresNativeTextTracks) {\n      this.hide();\n    } else {\n      this.show();\n    }\n  }\n  /**\n   * Create the {@link Component}'s DOM element.\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  ;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-text-track-display'\n    }, {\n      'translate': 'yes',\n      'aria-live': 'off',\n      'aria-atomic': 'true'\n    });\n  }\n  /**\n   * Clear all displayed {@link TextTrack}s.\n   */\n  ;\n\n  _proto.clearDisplay = function clearDisplay() {\n    if (typeof window$1.WebVTT === 'function') {\n      window$1.WebVTT.processCues(window$1, [], this.el_);\n    }\n  }\n  /**\n   * Update the displayed TextTrack when a either a {@link Player#texttrackchange} or\n   * a {@link Player#fullscreenchange} is fired.\n   *\n   * @listens Player#texttrackchange\n   * @listens Player#fullscreenchange\n   */\n  ;\n\n  _proto.updateDisplay = function updateDisplay() {\n    var tracks = this.player_.textTracks();\n    var allowMultipleShowingTracks = this.options_.allowMultipleShowingTracks;\n    this.clearDisplay();\n\n    if (allowMultipleShowingTracks) {\n      var showingTracks = [];\n\n      for (var _i = 0; _i < tracks.length; ++_i) {\n        var track = tracks[_i];\n\n        if (track.mode !== 'showing') {\n          continue;\n        }\n\n        showingTracks.push(track);\n      }\n\n      this.updateForTrack(showingTracks);\n      return;\n    } //  Track display prioritization model: if multiple tracks are 'showing',\n    //  display the first 'subtitles' or 'captions' track which is 'showing',\n    //  otherwise display the first 'descriptions' track which is 'showing'\n\n\n    var descriptionsTrack = null;\n    var captionsSubtitlesTrack = null;\n    var i = tracks.length;\n\n    while (i--) {\n      var _track = tracks[i];\n\n      if (_track.mode === 'showing') {\n        if (_track.kind === 'descriptions') {\n          descriptionsTrack = _track;\n        } else {\n          captionsSubtitlesTrack = _track;\n        }\n      }\n    }\n\n    if (captionsSubtitlesTrack) {\n      if (this.getAttribute('aria-live') !== 'off') {\n        this.setAttribute('aria-live', 'off');\n      }\n\n      this.updateForTrack(captionsSubtitlesTrack);\n    } else if (descriptionsTrack) {\n      if (this.getAttribute('aria-live') !== 'assertive') {\n        this.setAttribute('aria-live', 'assertive');\n      }\n\n      this.updateForTrack(descriptionsTrack);\n    }\n  }\n  /**\n   * Style {@Link TextTrack} activeCues according to {@Link TextTrackSettings}.\n   *\n   * @param {TextTrack} track\n   *        Text track object containing active cues to style.\n   */\n  ;\n\n  _proto.updateDisplayState = function updateDisplayState(track) {\n    var overrides = this.player_.textTrackSettings.getValues();\n    var cues = track.activeCues;\n    var i = cues.length;\n\n    while (i--) {\n      var cue = cues[i];\n\n      if (!cue) {\n        continue;\n      }\n\n      var cueDiv = cue.displayState;\n\n      if (overrides.color) {\n        cueDiv.firstChild.style.color = overrides.color;\n      }\n\n      if (overrides.textOpacity) {\n        tryUpdateStyle(cueDiv.firstChild, 'color', constructColor(overrides.color || '#fff', overrides.textOpacity));\n      }\n\n      if (overrides.backgroundColor) {\n        cueDiv.firstChild.style.backgroundColor = overrides.backgroundColor;\n      }\n\n      if (overrides.backgroundOpacity) {\n        tryUpdateStyle(cueDiv.firstChild, 'backgroundColor', constructColor(overrides.backgroundColor || '#000', overrides.backgroundOpacity));\n      }\n\n      if (overrides.windowColor) {\n        if (overrides.windowOpacity) {\n          tryUpdateStyle(cueDiv, 'backgroundColor', constructColor(overrides.windowColor, overrides.windowOpacity));\n        } else {\n          cueDiv.style.backgroundColor = overrides.windowColor;\n        }\n      }\n\n      if (overrides.edgeStyle) {\n        if (overrides.edgeStyle === 'dropshadow') {\n          cueDiv.firstChild.style.textShadow = \"2px 2px 3px \" + darkGray + \", 2px 2px 4px \" + darkGray + \", 2px 2px 5px \" + darkGray;\n        } else if (overrides.edgeStyle === 'raised') {\n          cueDiv.firstChild.style.textShadow = \"1px 1px \" + darkGray + \", 2px 2px \" + darkGray + \", 3px 3px \" + darkGray;\n        } else if (overrides.edgeStyle === 'depressed') {\n          cueDiv.firstChild.style.textShadow = \"1px 1px \" + lightGray + \", 0 1px \" + lightGray + \", -1px -1px \" + darkGray + \", 0 -1px \" + darkGray;\n        } else if (overrides.edgeStyle === 'uniform') {\n          cueDiv.firstChild.style.textShadow = \"0 0 4px \" + darkGray + \", 0 0 4px \" + darkGray + \", 0 0 4px \" + darkGray + \", 0 0 4px \" + darkGray;\n        }\n      }\n\n      if (overrides.fontPercent && overrides.fontPercent !== 1) {\n        var fontSize = window$1.parseFloat(cueDiv.style.fontSize);\n        cueDiv.style.fontSize = fontSize * overrides.fontPercent + 'px';\n        cueDiv.style.height = 'auto';\n        cueDiv.style.top = 'auto';\n      }\n\n      if (overrides.fontFamily && overrides.fontFamily !== 'default') {\n        if (overrides.fontFamily === 'small-caps') {\n          cueDiv.firstChild.style.fontVariant = 'small-caps';\n        } else {\n          cueDiv.firstChild.style.fontFamily = fontMap[overrides.fontFamily];\n        }\n      }\n    }\n  }\n  /**\n   * Add an {@link TextTrack} to to the {@link Tech}s {@link TextTrackList}.\n   *\n   * @param {TextTrack|TextTrack[]} tracks\n   *        Text track object or text track array to be added to the list.\n   */\n  ;\n\n  _proto.updateForTrack = function updateForTrack(tracks) {\n    if (!Array.isArray(tracks)) {\n      tracks = [tracks];\n    }\n\n    if (typeof window$1.WebVTT !== 'function' || tracks.every(function (track) {\n      return !track.activeCues;\n    })) {\n      return;\n    }\n\n    var cues = []; // push all active track cues\n\n    for (var i = 0; i < tracks.length; ++i) {\n      var track = tracks[i];\n\n      for (var j = 0; j < track.activeCues.length; ++j) {\n        cues.push(track.activeCues[j]);\n      }\n    } // removes all cues before it processes new ones\n\n\n    window$1.WebVTT.processCues(window$1, cues, this.el_); // add unique class to each language text track & add settings styling if necessary\n\n    for (var _i2 = 0; _i2 < tracks.length; ++_i2) {\n      var _track2 = tracks[_i2];\n\n      for (var _j = 0; _j < _track2.activeCues.length; ++_j) {\n        var cueEl = _track2.activeCues[_j].displayState;\n        addClass(cueEl, 'vjs-text-track-cue');\n        addClass(cueEl, 'vjs-text-track-cue-' + (_track2.language ? _track2.language : _i2));\n\n        if (_track2.language) {\n          setAttribute(cueEl, 'lang', _track2.language);\n        }\n      }\n\n      if (this.player_.textTrackSettings) {\n        this.updateDisplayState(_track2);\n      }\n    }\n  };\n\n  return TextTrackDisplay;\n}(Component$1);\n\nComponent$1.registerComponent('TextTrackDisplay', TextTrackDisplay);\n\n/**\n * A loading spinner for use during waiting/loading events.\n *\n * @extends Component\n */\n\nvar LoadingSpinner = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(LoadingSpinner, _Component);\n\n  function LoadingSpinner() {\n    return _Component.apply(this, arguments) || this;\n  }\n\n  var _proto = LoadingSpinner.prototype;\n\n  /**\n   * Create the `LoadingSpinner`s DOM element.\n   *\n   * @return {Element}\n   *         The dom element that gets created.\n   */\n  _proto.createEl = function createEl$1() {\n    var isAudio = this.player_.isAudio();\n    var playerType = this.localize(isAudio ? 'Audio Player' : 'Video Player');\n    var controlText = createEl('span', {\n      className: 'vjs-control-text',\n      textContent: this.localize('{1} is loading.', [playerType])\n    });\n\n    var el = _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-loading-spinner',\n      dir: 'ltr'\n    });\n\n    el.appendChild(controlText);\n    return el;\n  };\n\n  return LoadingSpinner;\n}(Component$1);\n\nComponent$1.registerComponent('LoadingSpinner', LoadingSpinner);\n\n/**\n * Base class for all buttons.\n *\n * @extends ClickableComponent\n */\n\nvar Button = /*#__PURE__*/function (_ClickableComponent) {\n  _inheritsLoose(Button, _ClickableComponent);\n\n  function Button() {\n    return _ClickableComponent.apply(this, arguments) || this;\n  }\n\n  var _proto = Button.prototype;\n\n  /**\n   * Create the `Button`s DOM element.\n   *\n   * @param {string} [tag=\"button\"]\n   *        The element's node type. This argument is IGNORED: no matter what\n   *        is passed, it will always create a `button` element.\n   *\n   * @param {Object} [props={}]\n   *        An object of properties that should be set on the element.\n   *\n   * @param {Object} [attributes={}]\n   *        An object of attributes that should be set on the element.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n  _proto.createEl = function createEl$1(tag, props, attributes) {\n    if (props === void 0) {\n      props = {};\n    }\n\n    if (attributes === void 0) {\n      attributes = {};\n    }\n\n    tag = 'button';\n    props = assign({\n      className: this.buildCSSClass()\n    }, props); // Add attributes for button element\n\n    attributes = assign({\n      // Necessary since the default button type is \"submit\"\n      type: 'button'\n    }, attributes);\n\n    var el = createEl(tag, props, attributes);\n\n    el.appendChild(createEl('span', {\n      className: 'vjs-icon-placeholder'\n    }, {\n      'aria-hidden': true\n    }));\n    this.createControlTextEl(el);\n    return el;\n  }\n  /**\n   * Add a child `Component` inside of this `Button`.\n   *\n   * @param {string|Component} child\n   *        The name or instance of a child to add.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of options that will get passed to children of\n   *        the child.\n   *\n   * @return {Component}\n   *         The `Component` that gets added as a child. When using a string the\n   *         `Component` will get created by this process.\n   *\n   * @deprecated since version 5\n   */\n  ;\n\n  _proto.addChild = function addChild(child, options) {\n    if (options === void 0) {\n      options = {};\n    }\n\n    var className = this.constructor.name;\n    log$1.warn(\"Adding an actionable (user controllable) child to a Button (\" + className + \") is not supported; use a ClickableComponent instead.\"); // Avoid the error message generated by ClickableComponent's addChild method\n\n    return Component$1.prototype.addChild.call(this, child, options);\n  }\n  /**\n   * Enable the `Button` element so that it can be activated or clicked. Use this with\n   * {@link Button#disable}.\n   */\n  ;\n\n  _proto.enable = function enable() {\n    _ClickableComponent.prototype.enable.call(this);\n\n    this.el_.removeAttribute('disabled');\n  }\n  /**\n   * Disable the `Button` element so that it cannot be activated or clicked. Use this with\n   * {@link Button#enable}.\n   */\n  ;\n\n  _proto.disable = function disable() {\n    _ClickableComponent.prototype.disable.call(this);\n\n    this.el_.setAttribute('disabled', 'disabled');\n  }\n  /**\n   * This gets called when a `Button` has focus and `keydown` is triggered via a key\n   * press.\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to get called.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    // Ignore Space or Enter key operation, which is handled by the browser for\n    // a button - though not for its super class, ClickableComponent. Also,\n    // prevent the event from propagating through the DOM and triggering Player\n    // hotkeys. We do not preventDefault here because we _want_ the browser to\n    // handle it.\n    if (keycode.isEventKey(event, 'Space') || keycode.isEventKey(event, 'Enter')) {\n      event.stopPropagation();\n      return;\n    } // Pass keypress handling up for unsupported keys\n\n\n    _ClickableComponent.prototype.handleKeyDown.call(this, event);\n  };\n\n  return Button;\n}(ClickableComponent);\n\nComponent$1.registerComponent('Button', Button);\n\n/**\n * The initial play button that shows before the video has played. The hiding of the\n * `BigPlayButton` get done via CSS and `Player` states.\n *\n * @extends Button\n */\n\nvar BigPlayButton = /*#__PURE__*/function (_Button) {\n  _inheritsLoose(BigPlayButton, _Button);\n\n  function BigPlayButton(player, options) {\n    var _this;\n\n    _this = _Button.call(this, player, options) || this;\n    _this.mouseused_ = false;\n\n    _this.on('mousedown', function (e) {\n      return _this.handleMouseDown(e);\n    });\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object. Always returns 'vjs-big-play-button'.\n   */\n\n\n  var _proto = BigPlayButton.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return 'vjs-big-play-button';\n  }\n  /**\n   * This gets called when a `BigPlayButton` \"clicked\". See {@link ClickableComponent}\n   * for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    var playPromise = this.player_.play(); // exit early if clicked via the mouse\n\n    if (this.mouseused_ && event.clientX && event.clientY) {\n      var sourceIsEncrypted = this.player_.usingPlugin('eme') && this.player_.eme.sessions && this.player_.eme.sessions.length > 0;\n      silencePromise(playPromise);\n\n      if (this.player_.tech(true) && // We've observed a bug in IE and Edge when playing back DRM content where\n      // calling .focus() on the video element causes the video to go black,\n      // so we avoid it in that specific case\n      !((IE_VERSION || IS_EDGE) && sourceIsEncrypted)) {\n        this.player_.tech(true).focus();\n      }\n\n      return;\n    }\n\n    var cb = this.player_.getChild('controlBar');\n    var playToggle = cb && cb.getChild('playToggle');\n\n    if (!playToggle) {\n      this.player_.tech(true).focus();\n      return;\n    }\n\n    var playFocus = function playFocus() {\n      return playToggle.focus();\n    };\n\n    if (isPromise(playPromise)) {\n      playPromise.then(playFocus, function () {});\n    } else {\n      this.setTimeout(playFocus, 1);\n    }\n  };\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    this.mouseused_ = false;\n\n    _Button.prototype.handleKeyDown.call(this, event);\n  };\n\n  _proto.handleMouseDown = function handleMouseDown(event) {\n    this.mouseused_ = true;\n  };\n\n  return BigPlayButton;\n}(Button);\n/**\n * The text that should display over the `BigPlayButton`s controls. Added to for localization.\n *\n * @type {string}\n * @private\n */\n\n\nBigPlayButton.prototype.controlText_ = 'Play Video';\nComponent$1.registerComponent('BigPlayButton', BigPlayButton);\n\n/**\n * The `CloseButton` is a `{@link Button}` that fires a `close` event when\n * it gets clicked.\n *\n * @extends Button\n */\n\nvar CloseButton = /*#__PURE__*/function (_Button) {\n  _inheritsLoose(CloseButton, _Button);\n\n  /**\n  * Creates an instance of the this class.\n  *\n  * @param  {Player} player\n  *         The `Player` that this class should be attached to.\n  *\n  * @param  {Object} [options]\n  *         The key/value store of player options.\n  */\n  function CloseButton(player, options) {\n    var _this;\n\n    _this = _Button.call(this, player, options) || this;\n\n    _this.controlText(options && options.controlText || _this.localize('Close'));\n\n    return _this;\n  }\n  /**\n  * Builds the default DOM `className`.\n  *\n  * @return {string}\n  *         The DOM `className` for this object.\n  */\n\n\n  var _proto = CloseButton.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-close-button \" + _Button.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * This gets called when a `CloseButton` gets clicked. See\n   * {@link ClickableComponent#handleClick} for more information on when\n   * this will be triggered\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   * @fires CloseButton#close\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    /**\n     * Triggered when the a `CloseButton` is clicked.\n     *\n     * @event CloseButton#close\n     * @type {EventTarget~Event}\n     *\n     * @property {boolean} [bubbles=false]\n     *           set to false so that the close event does not\n     *           bubble up to parents if there is no listener\n     */\n    this.trigger({\n      type: 'close',\n      bubbles: false\n    });\n  }\n  /**\n   * Event handler that is called when a `CloseButton` receives a\n   * `keydown` event.\n   *\n   * By default, if the key is Esc, it will trigger a `click` event.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    // Esc button will trigger `click` event\n    if (keycode.isEventKey(event, 'Esc')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.trigger('click');\n    } else {\n      // Pass keypress handling up for unsupported keys\n      _Button.prototype.handleKeyDown.call(this, event);\n    }\n  };\n\n  return CloseButton;\n}(Button);\n\nComponent$1.registerComponent('CloseButton', CloseButton);\n\n/**\n * Button to toggle between play and pause.\n *\n * @extends Button\n */\n\nvar PlayToggle = /*#__PURE__*/function (_Button) {\n  _inheritsLoose(PlayToggle, _Button);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   */\n  function PlayToggle(player, options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    _this = _Button.call(this, player, options) || this; // show or hide replay icon\n\n    options.replay = options.replay === undefined || options.replay;\n\n    _this.on(player, 'play', function (e) {\n      return _this.handlePlay(e);\n    });\n\n    _this.on(player, 'pause', function (e) {\n      return _this.handlePause(e);\n    });\n\n    if (options.replay) {\n      _this.on(player, 'ended', function (e) {\n        return _this.handleEnded(e);\n      });\n    }\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = PlayToggle.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-play-control \" + _Button.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * This gets called when an `PlayToggle` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    if (this.player_.paused()) {\n      silencePromise(this.player_.play());\n    } else {\n      this.player_.pause();\n    }\n  }\n  /**\n   * This gets called once after the video has ended and the user seeks so that\n   * we can change the replay button back to a play button.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#seeked\n   */\n  ;\n\n  _proto.handleSeeked = function handleSeeked(event) {\n    this.removeClass('vjs-ended');\n\n    if (this.player_.paused()) {\n      this.handlePause(event);\n    } else {\n      this.handlePlay(event);\n    }\n  }\n  /**\n   * Add the vjs-playing class to the element so it can change appearance.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#play\n   */\n  ;\n\n  _proto.handlePlay = function handlePlay(event) {\n    this.removeClass('vjs-ended');\n    this.removeClass('vjs-paused');\n    this.addClass('vjs-playing'); // change the button text to \"Pause\"\n\n    this.controlText('Pause');\n  }\n  /**\n   * Add the vjs-paused class to the element so it can change appearance.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#pause\n   */\n  ;\n\n  _proto.handlePause = function handlePause(event) {\n    this.removeClass('vjs-playing');\n    this.addClass('vjs-paused'); // change the button text to \"Play\"\n\n    this.controlText('Play');\n  }\n  /**\n   * Add the vjs-ended class to the element so it can change appearance\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#ended\n   */\n  ;\n\n  _proto.handleEnded = function handleEnded(event) {\n    var _this2 = this;\n\n    this.removeClass('vjs-playing');\n    this.addClass('vjs-ended'); // change the button text to \"Replay\"\n\n    this.controlText('Replay'); // on the next seek remove the replay button\n\n    this.one(this.player_, 'seeked', function (e) {\n      return _this2.handleSeeked(e);\n    });\n  };\n\n  return PlayToggle;\n}(Button);\n/**\n * The text that should display over the `PlayToggle`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nPlayToggle.prototype.controlText_ = 'Play';\nComponent$1.registerComponent('PlayToggle', PlayToggle);\n\n/**\n * @file format-time.js\n * @module format-time\n */\n\n/**\n * Format seconds as a time string, H:MM:SS or M:SS. Supplying a guide (in\n * seconds) will force a number of leading zeros to cover the length of the\n * guide.\n *\n * @private\n * @param  {number} seconds\n *         Number of seconds to be turned into a string\n *\n * @param  {number} guide\n *         Number (in seconds) to model the string after\n *\n * @return {string}\n *         Time formatted as H:MM:SS or M:SS\n */\nvar defaultImplementation = function defaultImplementation(seconds, guide) {\n  seconds = seconds < 0 ? 0 : seconds;\n  var s = Math.floor(seconds % 60);\n  var m = Math.floor(seconds / 60 % 60);\n  var h = Math.floor(seconds / 3600);\n  var gm = Math.floor(guide / 60 % 60);\n  var gh = Math.floor(guide / 3600); // handle invalid times\n\n  if (isNaN(seconds) || seconds === Infinity) {\n    // '-' is false for all relational operators (e.g. <, >=) so this setting\n    // will add the minimum number of fields specified by the guide\n    h = m = s = '-';\n  } // Check if we need to show hours\n\n\n  h = h > 0 || gh > 0 ? h + ':' : ''; // If hours are showing, we may need to add a leading zero.\n  // Always show at least one digit of minutes.\n\n  m = ((h || gm >= 10) && m < 10 ? '0' + m : m) + ':'; // Check if leading zero is need for seconds\n\n  s = s < 10 ? '0' + s : s;\n  return h + m + s;\n}; // Internal pointer to the current implementation.\n\n\nvar implementation = defaultImplementation;\n/**\n * Replaces the default formatTime implementation with a custom implementation.\n *\n * @param {Function} customImplementation\n *        A function which will be used in place of the default formatTime\n *        implementation. Will receive the current time in seconds and the\n *        guide (in seconds) as arguments.\n */\n\nfunction setFormatTime(customImplementation) {\n  implementation = customImplementation;\n}\n/**\n * Resets formatTime to the default implementation.\n */\n\nfunction resetFormatTime() {\n  implementation = defaultImplementation;\n}\n/**\n * Delegates to either the default time formatting function or a custom\n * function supplied via `setFormatTime`.\n *\n * Formats seconds as a time string (H:MM:SS or M:SS). Supplying a\n * guide (in seconds) will force a number of leading zeros to cover the\n * length of the guide.\n *\n * @static\n * @example  formatTime(125, 600) === \"02:05\"\n * @param    {number} seconds\n *           Number of seconds to be turned into a string\n *\n * @param    {number} guide\n *           Number (in seconds) to model the string after\n *\n * @return   {string}\n *           Time formatted as H:MM:SS or M:SS\n */\n\nfunction formatTime(seconds, guide) {\n  if (guide === void 0) {\n    guide = seconds;\n  }\n\n  return implementation(seconds, guide);\n}\n\n/**\n * Displays time information about the video\n *\n * @extends Component\n */\n\nvar TimeDisplay = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(TimeDisplay, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function TimeDisplay(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n\n    _this.on(player, ['timeupdate', 'ended'], function (e) {\n      return _this.updateContent(e);\n    });\n\n    _this.updateTextNode_();\n\n    return _this;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = TimeDisplay.prototype;\n\n  _proto.createEl = function createEl$1() {\n    var className = this.buildCSSClass();\n\n    var el = _Component.prototype.createEl.call(this, 'div', {\n      className: className + \" vjs-time-control vjs-control\"\n    });\n\n    var span = createEl('span', {\n      className: 'vjs-control-text',\n      textContent: this.localize(this.labelText_) + \"\\xA0\"\n    }, {\n      role: 'presentation'\n    });\n    el.appendChild(span);\n    this.contentEl_ = createEl('span', {\n      className: className + \"-display\"\n    }, {\n      // tell screen readers not to automatically read the time as it changes\n      'aria-live': 'off',\n      // span elements have no implicit role, but some screen readers (notably VoiceOver)\n      // treat them as a break between items in the DOM when using arrow keys\n      // (or left-to-right swipes on iOS) to read contents of a page. Using\n      // role='presentation' causes VoiceOver to NOT treat this span as a break.\n      'role': 'presentation'\n    });\n    el.appendChild(this.contentEl_);\n    return el;\n  };\n\n  _proto.dispose = function dispose() {\n    this.contentEl_ = null;\n    this.textNode_ = null;\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Updates the time display text node with a new time\n   *\n   * @param {number} [time=0] the time to update to\n   *\n   * @private\n   */\n  ;\n\n  _proto.updateTextNode_ = function updateTextNode_(time) {\n    var _this2 = this;\n\n    if (time === void 0) {\n      time = 0;\n    }\n\n    time = formatTime(time);\n\n    if (this.formattedTime_ === time) {\n      return;\n    }\n\n    this.formattedTime_ = time;\n    this.requestNamedAnimationFrame('TimeDisplay#updateTextNode_', function () {\n      if (!_this2.contentEl_) {\n        return;\n      }\n\n      var oldNode = _this2.textNode_;\n\n      if (oldNode && _this2.contentEl_.firstChild !== oldNode) {\n        oldNode = null;\n        log$1.warn('TimeDisplay#updateTextnode_: Prevented replacement of text node element since it was no longer a child of this node. Appending a new node instead.');\n      }\n\n      _this2.textNode_ = document.createTextNode(_this2.formattedTime_);\n\n      if (!_this2.textNode_) {\n        return;\n      }\n\n      if (oldNode) {\n        _this2.contentEl_.replaceChild(_this2.textNode_, oldNode);\n      } else {\n        _this2.contentEl_.appendChild(_this2.textNode_);\n      }\n    });\n  }\n  /**\n   * To be filled out in the child class, should update the displayed time\n   * in accordance with the fact that the current time has changed.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `timeupdate`  event that caused this to run.\n   *\n   * @listens Player#timeupdate\n   */\n  ;\n\n  _proto.updateContent = function updateContent(event) {};\n\n  return TimeDisplay;\n}(Component$1);\n/**\n * The text that is added to the `TimeDisplay` for screen reader users.\n *\n * @type {string}\n * @private\n */\n\n\nTimeDisplay.prototype.labelText_ = 'Time';\n/**\n * The text that should display over the `TimeDisplay`s controls. Added to for localization.\n *\n * @type {string}\n * @private\n *\n * @deprecated in v7; controlText_ is not used in non-active display Components\n */\n\nTimeDisplay.prototype.controlText_ = 'Time';\nComponent$1.registerComponent('TimeDisplay', TimeDisplay);\n\n/**\n * Displays the current time\n *\n * @extends Component\n */\n\nvar CurrentTimeDisplay = /*#__PURE__*/function (_TimeDisplay) {\n  _inheritsLoose(CurrentTimeDisplay, _TimeDisplay);\n\n  function CurrentTimeDisplay() {\n    return _TimeDisplay.apply(this, arguments) || this;\n  }\n\n  var _proto = CurrentTimeDisplay.prototype;\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n  _proto.buildCSSClass = function buildCSSClass() {\n    return 'vjs-current-time';\n  }\n  /**\n   * Update current time display\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `timeupdate` event that caused this function to run.\n   *\n   * @listens Player#timeupdate\n   */\n  ;\n\n  _proto.updateContent = function updateContent(event) {\n    // Allows for smooth scrubbing, when player can't keep up.\n    var time;\n\n    if (this.player_.ended()) {\n      time = this.player_.duration();\n    } else {\n      time = this.player_.scrubbing() ? this.player_.getCache().currentTime : this.player_.currentTime();\n    }\n\n    this.updateTextNode_(time);\n  };\n\n  return CurrentTimeDisplay;\n}(TimeDisplay);\n/**\n * The text that is added to the `CurrentTimeDisplay` for screen reader users.\n *\n * @type {string}\n * @private\n */\n\n\nCurrentTimeDisplay.prototype.labelText_ = 'Current Time';\n/**\n * The text that should display over the `CurrentTimeDisplay`s controls. Added to for localization.\n *\n * @type {string}\n * @private\n *\n * @deprecated in v7; controlText_ is not used in non-active display Components\n */\n\nCurrentTimeDisplay.prototype.controlText_ = 'Current Time';\nComponent$1.registerComponent('CurrentTimeDisplay', CurrentTimeDisplay);\n\n/**\n * Displays the duration\n *\n * @extends Component\n */\n\nvar DurationDisplay = /*#__PURE__*/function (_TimeDisplay) {\n  _inheritsLoose(DurationDisplay, _TimeDisplay);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function DurationDisplay(player, options) {\n    var _this;\n\n    _this = _TimeDisplay.call(this, player, options) || this;\n\n    var updateContent = function updateContent(e) {\n      return _this.updateContent(e);\n    }; // we do not want to/need to throttle duration changes,\n    // as they should always display the changed duration as\n    // it has changed\n\n\n    _this.on(player, 'durationchange', updateContent); // Listen to loadstart because the player duration is reset when a new media element is loaded,\n    // but the durationchange on the user agent will not fire.\n    // @see [Spec]{@link https://www.w3.org/TR/2011/WD-html5-20110113/video.html#media-element-load-algorithm}\n\n\n    _this.on(player, 'loadstart', updateContent); // Also listen for timeupdate (in the parent) and loadedmetadata because removing those\n    // listeners could have broken dependent applications/libraries. These\n    // can likely be removed for 7.0.\n\n\n    _this.on(player, 'loadedmetadata', updateContent);\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = DurationDisplay.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return 'vjs-duration';\n  }\n  /**\n   * Update duration time display.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `durationchange`, `timeupdate`, or `loadedmetadata` event that caused\n   *        this function to be called.\n   *\n   * @listens Player#durationchange\n   * @listens Player#timeupdate\n   * @listens Player#loadedmetadata\n   */\n  ;\n\n  _proto.updateContent = function updateContent(event) {\n    var duration = this.player_.duration();\n    this.updateTextNode_(duration);\n  };\n\n  return DurationDisplay;\n}(TimeDisplay);\n/**\n * The text that is added to the `DurationDisplay` for screen reader users.\n *\n * @type {string}\n * @private\n */\n\n\nDurationDisplay.prototype.labelText_ = 'Duration';\n/**\n * The text that should display over the `DurationDisplay`s controls. Added to for localization.\n *\n * @type {string}\n * @private\n *\n * @deprecated in v7; controlText_ is not used in non-active display Components\n */\n\nDurationDisplay.prototype.controlText_ = 'Duration';\nComponent$1.registerComponent('DurationDisplay', DurationDisplay);\n\n/**\n * The separator between the current time and duration.\n * Can be hidden if it's not needed in the design.\n *\n * @extends Component\n */\n\nvar TimeDivider = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(TimeDivider, _Component);\n\n  function TimeDivider() {\n    return _Component.apply(this, arguments) || this;\n  }\n\n  var _proto = TimeDivider.prototype;\n\n  /**\n   * Create the component's DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  _proto.createEl = function createEl() {\n    var el = _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-time-control vjs-time-divider'\n    }, {\n      // this element and its contents can be hidden from assistive techs since\n      // it is made extraneous by the announcement of the control text\n      // for the current time and duration displays\n      'aria-hidden': true\n    });\n\n    var div = _Component.prototype.createEl.call(this, 'div');\n\n    var span = _Component.prototype.createEl.call(this, 'span', {\n      textContent: '/'\n    });\n\n    div.appendChild(span);\n    el.appendChild(div);\n    return el;\n  };\n\n  return TimeDivider;\n}(Component$1);\n\nComponent$1.registerComponent('TimeDivider', TimeDivider);\n\n/**\n * Displays the time left in the video\n *\n * @extends Component\n */\n\nvar RemainingTimeDisplay = /*#__PURE__*/function (_TimeDisplay) {\n  _inheritsLoose(RemainingTimeDisplay, _TimeDisplay);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function RemainingTimeDisplay(player, options) {\n    var _this;\n\n    _this = _TimeDisplay.call(this, player, options) || this;\n\n    _this.on(player, 'durationchange', function (e) {\n      return _this.updateContent(e);\n    });\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = RemainingTimeDisplay.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return 'vjs-remaining-time';\n  }\n  /**\n   * Create the `Component`'s DOM element with the \"minus\" characted prepend to the time\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  ;\n\n  _proto.createEl = function createEl$1() {\n    var el = _TimeDisplay.prototype.createEl.call(this);\n\n    if (this.options_.displayNegative !== false) {\n      el.insertBefore(createEl('span', {}, {\n        'aria-hidden': true\n      }, '-'), this.contentEl_);\n    }\n\n    return el;\n  }\n  /**\n   * Update remaining time display.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `timeupdate` or `durationchange` event that caused this to run.\n   *\n   * @listens Player#timeupdate\n   * @listens Player#durationchange\n   */\n  ;\n\n  _proto.updateContent = function updateContent(event) {\n    if (typeof this.player_.duration() !== 'number') {\n      return;\n    }\n\n    var time; // @deprecated We should only use remainingTimeDisplay\n    // as of video.js 7\n\n    if (this.player_.ended()) {\n      time = 0;\n    } else if (this.player_.remainingTimeDisplay) {\n      time = this.player_.remainingTimeDisplay();\n    } else {\n      time = this.player_.remainingTime();\n    }\n\n    this.updateTextNode_(time);\n  };\n\n  return RemainingTimeDisplay;\n}(TimeDisplay);\n/**\n * The text that is added to the `RemainingTimeDisplay` for screen reader users.\n *\n * @type {string}\n * @private\n */\n\n\nRemainingTimeDisplay.prototype.labelText_ = 'Remaining Time';\n/**\n * The text that should display over the `RemainingTimeDisplay`s controls. Added to for localization.\n *\n * @type {string}\n * @private\n *\n * @deprecated in v7; controlText_ is not used in non-active display Components\n */\n\nRemainingTimeDisplay.prototype.controlText_ = 'Remaining Time';\nComponent$1.registerComponent('RemainingTimeDisplay', RemainingTimeDisplay);\n\n/**\n * Displays the live indicator when duration is Infinity.\n *\n * @extends Component\n */\n\nvar LiveDisplay = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(LiveDisplay, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function LiveDisplay(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n\n    _this.updateShowing();\n\n    _this.on(_this.player(), 'durationchange', function (e) {\n      return _this.updateShowing(e);\n    });\n\n    return _this;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = LiveDisplay.prototype;\n\n  _proto.createEl = function createEl$1() {\n    var el = _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-live-control vjs-control'\n    });\n\n    this.contentEl_ = createEl('div', {\n      className: 'vjs-live-display'\n    }, {\n      'aria-live': 'off'\n    });\n    this.contentEl_.appendChild(createEl('span', {\n      className: 'vjs-control-text',\n      textContent: this.localize('Stream Type') + \"\\xA0\"\n    }));\n    this.contentEl_.appendChild(document.createTextNode(this.localize('LIVE')));\n    el.appendChild(this.contentEl_);\n    return el;\n  };\n\n  _proto.dispose = function dispose() {\n    this.contentEl_ = null;\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Check the duration to see if the LiveDisplay should be showing or not. Then show/hide\n   * it accordingly\n   *\n   * @param {EventTarget~Event} [event]\n   *        The {@link Player#durationchange} event that caused this function to run.\n   *\n   * @listens Player#durationchange\n   */\n  ;\n\n  _proto.updateShowing = function updateShowing(event) {\n    if (this.player().duration() === Infinity) {\n      this.show();\n    } else {\n      this.hide();\n    }\n  };\n\n  return LiveDisplay;\n}(Component$1);\n\nComponent$1.registerComponent('LiveDisplay', LiveDisplay);\n\n/**\n * Displays the live indicator when duration is Infinity.\n *\n * @extends Component\n */\n\nvar SeekToLive = /*#__PURE__*/function (_Button) {\n  _inheritsLoose(SeekToLive, _Button);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function SeekToLive(player, options) {\n    var _this;\n\n    _this = _Button.call(this, player, options) || this;\n\n    _this.updateLiveEdgeStatus();\n\n    if (_this.player_.liveTracker) {\n      _this.updateLiveEdgeStatusHandler_ = function (e) {\n        return _this.updateLiveEdgeStatus(e);\n      };\n\n      _this.on(_this.player_.liveTracker, 'liveedgechange', _this.updateLiveEdgeStatusHandler_);\n    }\n\n    return _this;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = SeekToLive.prototype;\n\n  _proto.createEl = function createEl$1() {\n    var el = _Button.prototype.createEl.call(this, 'button', {\n      className: 'vjs-seek-to-live-control vjs-control'\n    });\n\n    this.textEl_ = createEl('span', {\n      className: 'vjs-seek-to-live-text',\n      textContent: this.localize('LIVE')\n    }, {\n      'aria-hidden': 'true'\n    });\n    el.appendChild(this.textEl_);\n    return el;\n  }\n  /**\n   * Update the state of this button if we are at the live edge\n   * or not\n   */\n  ;\n\n  _proto.updateLiveEdgeStatus = function updateLiveEdgeStatus() {\n    // default to live edge\n    if (!this.player_.liveTracker || this.player_.liveTracker.atLiveEdge()) {\n      this.setAttribute('aria-disabled', true);\n      this.addClass('vjs-at-live-edge');\n      this.controlText('Seek to live, currently playing live');\n    } else {\n      this.setAttribute('aria-disabled', false);\n      this.removeClass('vjs-at-live-edge');\n      this.controlText('Seek to live, currently behind live');\n    }\n  }\n  /**\n   * On click bring us as near to the live point as possible.\n   * This requires that we wait for the next `live-seekable-change`\n   * event which will happen every segment length seconds.\n   */\n  ;\n\n  _proto.handleClick = function handleClick() {\n    this.player_.liveTracker.seekToLiveEdge();\n  }\n  /**\n   * Dispose of the element and stop tracking\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    if (this.player_.liveTracker) {\n      this.off(this.player_.liveTracker, 'liveedgechange', this.updateLiveEdgeStatusHandler_);\n    }\n\n    this.textEl_ = null;\n\n    _Button.prototype.dispose.call(this);\n  };\n\n  return SeekToLive;\n}(Button);\n\nSeekToLive.prototype.controlText_ = 'Seek to live, currently playing live';\nComponent$1.registerComponent('SeekToLive', SeekToLive);\n\n/**\n * Keep a number between a min and a max value\n *\n * @param {number} number\n *        The number to clamp\n *\n * @param {number} min\n *        The minimum value\n * @param {number} max\n *        The maximum value\n *\n * @return {number}\n *         the clamped number\n */\nvar clamp = function clamp(number, min, max) {\n  number = Number(number);\n  return Math.min(max, Math.max(min, isNaN(number) ? min : number));\n};\n\n/**\n * The base functionality for a slider. Can be vertical or horizontal.\n * For instance the volume bar or the seek bar on a video is a slider.\n *\n * @extends Component\n */\n\nvar Slider = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(Slider, _Component);\n\n  /**\n  * Create an instance of this class\n  *\n  * @param {Player} player\n  *        The `Player` that this class should be attached to.\n  *\n  * @param {Object} [options]\n  *        The key/value store of player options.\n  */\n  function Slider(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n\n    _this.handleMouseDown_ = function (e) {\n      return _this.handleMouseDown(e);\n    };\n\n    _this.handleMouseUp_ = function (e) {\n      return _this.handleMouseUp(e);\n    };\n\n    _this.handleKeyDown_ = function (e) {\n      return _this.handleKeyDown(e);\n    };\n\n    _this.handleClick_ = function (e) {\n      return _this.handleClick(e);\n    };\n\n    _this.handleMouseMove_ = function (e) {\n      return _this.handleMouseMove(e);\n    };\n\n    _this.update_ = function (e) {\n      return _this.update(e);\n    }; // Set property names to bar to match with the child Slider class is looking for\n\n\n    _this.bar = _this.getChild(_this.options_.barName); // Set a horizontal or vertical class on the slider depending on the slider type\n\n    _this.vertical(!!_this.options_.vertical);\n\n    _this.enable();\n\n    return _this;\n  }\n  /**\n   * Are controls are currently enabled for this slider or not.\n   *\n   * @return {boolean}\n   *         true if controls are enabled, false otherwise\n   */\n\n\n  var _proto = Slider.prototype;\n\n  _proto.enabled = function enabled() {\n    return this.enabled_;\n  }\n  /**\n   * Enable controls for this slider if they are disabled\n   */\n  ;\n\n  _proto.enable = function enable() {\n    if (this.enabled()) {\n      return;\n    }\n\n    this.on('mousedown', this.handleMouseDown_);\n    this.on('touchstart', this.handleMouseDown_);\n    this.on('keydown', this.handleKeyDown_);\n    this.on('click', this.handleClick_); // TODO: deprecated, controlsvisible does not seem to be fired\n\n    this.on(this.player_, 'controlsvisible', this.update);\n\n    if (this.playerEvent) {\n      this.on(this.player_, this.playerEvent, this.update);\n    }\n\n    this.removeClass('disabled');\n    this.setAttribute('tabindex', 0);\n    this.enabled_ = true;\n  }\n  /**\n   * Disable controls for this slider if they are enabled\n   */\n  ;\n\n  _proto.disable = function disable() {\n    if (!this.enabled()) {\n      return;\n    }\n\n    var doc = this.bar.el_.ownerDocument;\n    this.off('mousedown', this.handleMouseDown_);\n    this.off('touchstart', this.handleMouseDown_);\n    this.off('keydown', this.handleKeyDown_);\n    this.off('click', this.handleClick_);\n    this.off(this.player_, 'controlsvisible', this.update_);\n    this.off(doc, 'mousemove', this.handleMouseMove_);\n    this.off(doc, 'mouseup', this.handleMouseUp_);\n    this.off(doc, 'touchmove', this.handleMouseMove_);\n    this.off(doc, 'touchend', this.handleMouseUp_);\n    this.removeAttribute('tabindex');\n    this.addClass('disabled');\n\n    if (this.playerEvent) {\n      this.off(this.player_, this.playerEvent, this.update);\n    }\n\n    this.enabled_ = false;\n  }\n  /**\n   * Create the `Slider`s DOM element.\n   *\n   * @param {string} type\n   *        Type of element to create.\n   *\n   * @param {Object} [props={}]\n   *        List of properties in Object form.\n   *\n   * @param {Object} [attributes={}]\n   *        list of attributes in Object form.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n  ;\n\n  _proto.createEl = function createEl(type, props, attributes) {\n    if (props === void 0) {\n      props = {};\n    }\n\n    if (attributes === void 0) {\n      attributes = {};\n    }\n\n    // Add the slider element class to all sub classes\n    props.className = props.className + ' vjs-slider';\n    props = assign({\n      tabIndex: 0\n    }, props);\n    attributes = assign({\n      'role': 'slider',\n      'aria-valuenow': 0,\n      'aria-valuemin': 0,\n      'aria-valuemax': 100,\n      'tabIndex': 0\n    }, attributes);\n    return _Component.prototype.createEl.call(this, type, props, attributes);\n  }\n  /**\n   * Handle `mousedown` or `touchstart` events on the `Slider`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown` or `touchstart` event that triggered this function\n   *\n   * @listens mousedown\n   * @listens touchstart\n   * @fires Slider#slideractive\n   */\n  ;\n\n  _proto.handleMouseDown = function handleMouseDown(event) {\n    var doc = this.bar.el_.ownerDocument;\n\n    if (event.type === 'mousedown') {\n      event.preventDefault();\n    } // Do not call preventDefault() on touchstart in Chrome\n    // to avoid console warnings. Use a 'touch-action: none' style\n    // instead to prevent unintented scrolling.\n    // https://developers.google.com/web/updates/2017/01/scrolling-intervention\n\n\n    if (event.type === 'touchstart' && !IS_CHROME) {\n      event.preventDefault();\n    }\n\n    blockTextSelection();\n    this.addClass('vjs-sliding');\n    /**\n     * Triggered when the slider is in an active state\n     *\n     * @event Slider#slideractive\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('slideractive');\n    this.on(doc, 'mousemove', this.handleMouseMove_);\n    this.on(doc, 'mouseup', this.handleMouseUp_);\n    this.on(doc, 'touchmove', this.handleMouseMove_);\n    this.on(doc, 'touchend', this.handleMouseUp_);\n    this.handleMouseMove(event, true);\n  }\n  /**\n   * Handle the `mousemove`, `touchmove`, and `mousedown` events on this `Slider`.\n   * The `mousemove` and `touchmove` events will only only trigger this function during\n   * `mousedown` and `touchstart`. This is due to {@link Slider#handleMouseDown} and\n   * {@link Slider#handleMouseUp}.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown`, `mousemove`, `touchstart`, or `touchmove` event that triggered\n   *        this function\n   * @param {boolean} mouseDown this is a flag that should be set to true if `handleMouseMove` is called directly. It allows us to skip things that should not happen if coming from mouse down but should happen on regular mouse move handler. Defaults to false.\n   *\n   * @listens mousemove\n   * @listens touchmove\n   */\n  ;\n\n  _proto.handleMouseMove = function handleMouseMove(event) {}\n  /**\n   * Handle `mouseup` or `touchend` events on the `Slider`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mouseup` or `touchend` event that triggered this function.\n   *\n   * @listens touchend\n   * @listens mouseup\n   * @fires Slider#sliderinactive\n   */\n  ;\n\n  _proto.handleMouseUp = function handleMouseUp() {\n    var doc = this.bar.el_.ownerDocument;\n    unblockTextSelection();\n    this.removeClass('vjs-sliding');\n    /**\n     * Triggered when the slider is no longer in an active state.\n     *\n     * @event Slider#sliderinactive\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('sliderinactive');\n    this.off(doc, 'mousemove', this.handleMouseMove_);\n    this.off(doc, 'mouseup', this.handleMouseUp_);\n    this.off(doc, 'touchmove', this.handleMouseMove_);\n    this.off(doc, 'touchend', this.handleMouseUp_);\n    this.update();\n  }\n  /**\n   * Update the progress bar of the `Slider`.\n   *\n   * @return {number}\n   *          The percentage of progress the progress bar represents as a\n   *          number from 0 to 1.\n   */\n  ;\n\n  _proto.update = function update() {\n    var _this2 = this;\n\n    // In VolumeBar init we have a setTimeout for update that pops and update\n    // to the end of the execution stack. The player is destroyed before then\n    // update will cause an error\n    // If there's no bar...\n    if (!this.el_ || !this.bar) {\n      return;\n    } // clamp progress between 0 and 1\n    // and only round to four decimal places, as we round to two below\n\n\n    var progress = this.getProgress();\n\n    if (progress === this.progress_) {\n      return progress;\n    }\n\n    this.progress_ = progress;\n    this.requestNamedAnimationFrame('Slider#update', function () {\n      // Set the new bar width or height\n      var sizeKey = _this2.vertical() ? 'height' : 'width'; // Convert to a percentage for css value\n\n      _this2.bar.el().style[sizeKey] = (progress * 100).toFixed(2) + '%';\n    });\n    return progress;\n  }\n  /**\n   * Get the percentage of the bar that should be filled\n   * but clamped and rounded.\n   *\n   * @return {number}\n   *         percentage filled that the slider is\n   */\n  ;\n\n  _proto.getProgress = function getProgress() {\n    return Number(clamp(this.getPercent(), 0, 1).toFixed(4));\n  }\n  /**\n   * Calculate distance for slider\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to run.\n   *\n   * @return {number}\n   *         The current position of the Slider.\n   *         - position.x for vertical `Slider`s\n   *         - position.y for horizontal `Slider`s\n   */\n  ;\n\n  _proto.calculateDistance = function calculateDistance(event) {\n    var position = getPointerPosition(this.el_, event);\n\n    if (this.vertical()) {\n      return position.y;\n    }\n\n    return position.x;\n  }\n  /**\n   * Handle a `keydown` event on the `Slider`. Watches for left, rigth, up, and down\n   * arrow keys. This function will only be called when the slider has focus. See\n   * {@link Slider#handleFocus} and {@link Slider#handleBlur}.\n   *\n   * @param {EventTarget~Event} event\n   *        the `keydown` event that caused this function to run.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    // Left and Down Arrows\n    if (keycode.isEventKey(event, 'Left') || keycode.isEventKey(event, 'Down')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.stepBack(); // Up and Right Arrows\n    } else if (keycode.isEventKey(event, 'Right') || keycode.isEventKey(event, 'Up')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.stepForward();\n    } else {\n      // Pass keydown handling up for unsupported keys\n      _Component.prototype.handleKeyDown.call(this, event);\n    }\n  }\n  /**\n   * Listener for click events on slider, used to prevent clicks\n   *   from bubbling up to parent elements like button menus.\n   *\n   * @param {Object} event\n   *        Event that caused this object to run\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    event.stopPropagation();\n    event.preventDefault();\n  }\n  /**\n   * Get/set if slider is horizontal for vertical\n   *\n   * @param {boolean} [bool]\n   *        - true if slider is vertical,\n   *        - false is horizontal\n   *\n   * @return {boolean}\n   *         - true if slider is vertical, and getting\n   *         - false if the slider is horizontal, and getting\n   */\n  ;\n\n  _proto.vertical = function vertical(bool) {\n    if (bool === undefined) {\n      return this.vertical_ || false;\n    }\n\n    this.vertical_ = !!bool;\n\n    if (this.vertical_) {\n      this.addClass('vjs-slider-vertical');\n    } else {\n      this.addClass('vjs-slider-horizontal');\n    }\n  };\n\n  return Slider;\n}(Component$1);\n\nComponent$1.registerComponent('Slider', Slider);\n\nvar percentify = function percentify(time, end) {\n  return clamp(time / end * 100, 0, 100).toFixed(2) + '%';\n};\n/**\n * Shows loading progress\n *\n * @extends Component\n */\n\n\nvar LoadProgressBar = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(LoadProgressBar, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function LoadProgressBar(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n    _this.partEls_ = [];\n\n    _this.on(player, 'progress', function (e) {\n      return _this.update(e);\n    });\n\n    return _this;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = LoadProgressBar.prototype;\n\n  _proto.createEl = function createEl$1() {\n    var el = _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-load-progress'\n    });\n\n    var wrapper = createEl('span', {\n      className: 'vjs-control-text'\n    });\n    var loadedText = createEl('span', {\n      textContent: this.localize('Loaded')\n    });\n    var separator = document.createTextNode(': ');\n    this.percentageEl_ = createEl('span', {\n      className: 'vjs-control-text-loaded-percentage',\n      textContent: '0%'\n    });\n    el.appendChild(wrapper);\n    wrapper.appendChild(loadedText);\n    wrapper.appendChild(separator);\n    wrapper.appendChild(this.percentageEl_);\n    return el;\n  };\n\n  _proto.dispose = function dispose() {\n    this.partEls_ = null;\n    this.percentageEl_ = null;\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Update progress bar\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `progress` event that caused this function to run.\n   *\n   * @listens Player#progress\n   */\n  ;\n\n  _proto.update = function update(event) {\n    var _this2 = this;\n\n    this.requestNamedAnimationFrame('LoadProgressBar#update', function () {\n      var liveTracker = _this2.player_.liveTracker;\n\n      var buffered = _this2.player_.buffered();\n\n      var duration = liveTracker && liveTracker.isLive() ? liveTracker.seekableEnd() : _this2.player_.duration();\n\n      var bufferedEnd = _this2.player_.bufferedEnd();\n\n      var children = _this2.partEls_;\n      var percent = percentify(bufferedEnd, duration);\n\n      if (_this2.percent_ !== percent) {\n        // update the width of the progress bar\n        _this2.el_.style.width = percent; // update the control-text\n\n        textContent(_this2.percentageEl_, percent);\n        _this2.percent_ = percent;\n      } // add child elements to represent the individual buffered time ranges\n\n\n      for (var i = 0; i < buffered.length; i++) {\n        var start = buffered.start(i);\n        var end = buffered.end(i);\n        var part = children[i];\n\n        if (!part) {\n          part = _this2.el_.appendChild(createEl());\n          children[i] = part;\n        } //  only update if changed\n\n\n        if (part.dataset.start === start && part.dataset.end === end) {\n          continue;\n        }\n\n        part.dataset.start = start;\n        part.dataset.end = end; // set the percent based on the width of the progress bar (bufferedEnd)\n\n        part.style.left = percentify(start, bufferedEnd);\n        part.style.width = percentify(end - start, bufferedEnd);\n      } // remove unused buffered range elements\n\n\n      for (var _i = children.length; _i > buffered.length; _i--) {\n        _this2.el_.removeChild(children[_i - 1]);\n      }\n\n      children.length = buffered.length;\n    });\n  };\n\n  return LoadProgressBar;\n}(Component$1);\n\nComponent$1.registerComponent('LoadProgressBar', LoadProgressBar);\n\n/**\n * Time tooltips display a time above the progress bar.\n *\n * @extends Component\n */\n\nvar TimeTooltip = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(TimeTooltip, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The {@link Player} that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function TimeTooltip(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n    _this.update = throttle(bind(_assertThisInitialized(_this), _this.update), UPDATE_REFRESH_INTERVAL);\n    return _this;\n  }\n  /**\n   * Create the time tooltip DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = TimeTooltip.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-time-tooltip'\n    }, {\n      'aria-hidden': 'true'\n    });\n  }\n  /**\n   * Updates the position of the time tooltip relative to the `SeekBar`.\n   *\n   * @param {Object} seekBarRect\n   *        The `ClientRect` for the {@link SeekBar} element.\n   *\n   * @param {number} seekBarPoint\n   *        A number from 0 to 1, representing a horizontal reference point\n   *        from the left edge of the {@link SeekBar}\n   */\n  ;\n\n  _proto.update = function update(seekBarRect, seekBarPoint, content) {\n    var tooltipRect = findPosition(this.el_);\n    var playerRect = getBoundingClientRect(this.player_.el());\n    var seekBarPointPx = seekBarRect.width * seekBarPoint; // do nothing if either rect isn't available\n    // for example, if the player isn't in the DOM for testing\n\n    if (!playerRect || !tooltipRect) {\n      return;\n    } // This is the space left of the `seekBarPoint` available within the bounds\n    // of the player. We calculate any gap between the left edge of the player\n    // and the left edge of the `SeekBar` and add the number of pixels in the\n    // `SeekBar` before hitting the `seekBarPoint`\n\n\n    var spaceLeftOfPoint = seekBarRect.left - playerRect.left + seekBarPointPx; // This is the space right of the `seekBarPoint` available within the bounds\n    // of the player. We calculate the number of pixels from the `seekBarPoint`\n    // to the right edge of the `SeekBar` and add to that any gap between the\n    // right edge of the `SeekBar` and the player.\n\n    var spaceRightOfPoint = seekBarRect.width - seekBarPointPx + (playerRect.right - seekBarRect.right); // This is the number of pixels by which the tooltip will need to be pulled\n    // further to the right to center it over the `seekBarPoint`.\n\n    var pullTooltipBy = tooltipRect.width / 2; // Adjust the `pullTooltipBy` distance to the left or right depending on\n    // the results of the space calculations above.\n\n    if (spaceLeftOfPoint < pullTooltipBy) {\n      pullTooltipBy += pullTooltipBy - spaceLeftOfPoint;\n    } else if (spaceRightOfPoint < pullTooltipBy) {\n      pullTooltipBy = spaceRightOfPoint;\n    } // Due to the imprecision of decimal/ratio based calculations and varying\n    // rounding behaviors, there are cases where the spacing adjustment is off\n    // by a pixel or two. This adds insurance to these calculations.\n\n\n    if (pullTooltipBy < 0) {\n      pullTooltipBy = 0;\n    } else if (pullTooltipBy > tooltipRect.width) {\n      pullTooltipBy = tooltipRect.width;\n    } // prevent small width fluctuations within 0.4px from\n    // changing the value below.\n    // This really helps for live to prevent the play\n    // progress time tooltip from jittering\n\n\n    pullTooltipBy = Math.round(pullTooltipBy);\n    this.el_.style.right = \"-\" + pullTooltipBy + \"px\";\n    this.write(content);\n  }\n  /**\n   * Write the time to the tooltip DOM element.\n   *\n   * @param {string} content\n   *        The formatted time for the tooltip.\n   */\n  ;\n\n  _proto.write = function write(content) {\n    textContent(this.el_, content);\n  }\n  /**\n   * Updates the position of the time tooltip relative to the `SeekBar`.\n   *\n   * @param {Object} seekBarRect\n   *        The `ClientRect` for the {@link SeekBar} element.\n   *\n   * @param {number} seekBarPoint\n   *        A number from 0 to 1, representing a horizontal reference point\n   *        from the left edge of the {@link SeekBar}\n   *\n   * @param {number} time\n   *        The time to update the tooltip to, not used during live playback\n   *\n   * @param {Function} cb\n   *        A function that will be called during the request animation frame\n   *        for tooltips that need to do additional animations from the default\n   */\n  ;\n\n  _proto.updateTime = function updateTime(seekBarRect, seekBarPoint, time, cb) {\n    var _this2 = this;\n\n    this.requestNamedAnimationFrame('TimeTooltip#updateTime', function () {\n      var content;\n\n      var duration = _this2.player_.duration();\n\n      if (_this2.player_.liveTracker && _this2.player_.liveTracker.isLive()) {\n        var liveWindow = _this2.player_.liveTracker.liveWindow();\n\n        var secondsBehind = liveWindow - seekBarPoint * liveWindow;\n        content = (secondsBehind < 1 ? '' : '-') + formatTime(secondsBehind, liveWindow);\n      } else {\n        content = formatTime(time, duration);\n      }\n\n      _this2.update(seekBarRect, seekBarPoint, content);\n\n      if (cb) {\n        cb();\n      }\n    });\n  };\n\n  return TimeTooltip;\n}(Component$1);\n\nComponent$1.registerComponent('TimeTooltip', TimeTooltip);\n\n/**\n * Used by {@link SeekBar} to display media playback progress as part of the\n * {@link ProgressControl}.\n *\n * @extends Component\n */\n\nvar PlayProgressBar = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(PlayProgressBar, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The {@link Player} that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function PlayProgressBar(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n    _this.update = throttle(bind(_assertThisInitialized(_this), _this.update), UPDATE_REFRESH_INTERVAL);\n    return _this;\n  }\n  /**\n   * Create the the DOM element for this class.\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = PlayProgressBar.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-play-progress vjs-slider-bar'\n    }, {\n      'aria-hidden': 'true'\n    });\n  }\n  /**\n   * Enqueues updates to its own DOM as well as the DOM of its\n   * {@link TimeTooltip} child.\n   *\n   * @param {Object} seekBarRect\n   *        The `ClientRect` for the {@link SeekBar} element.\n   *\n   * @param {number} seekBarPoint\n   *        A number from 0 to 1, representing a horizontal reference point\n   *        from the left edge of the {@link SeekBar}\n   */\n  ;\n\n  _proto.update = function update(seekBarRect, seekBarPoint) {\n    var timeTooltip = this.getChild('timeTooltip');\n\n    if (!timeTooltip) {\n      return;\n    }\n\n    var time = this.player_.scrubbing() ? this.player_.getCache().currentTime : this.player_.currentTime();\n    timeTooltip.updateTime(seekBarRect, seekBarPoint, time);\n  };\n\n  return PlayProgressBar;\n}(Component$1);\n/**\n * Default options for {@link PlayProgressBar}.\n *\n * @type {Object}\n * @private\n */\n\n\nPlayProgressBar.prototype.options_ = {\n  children: []\n}; // Time tooltips should not be added to a player on mobile devices\n\nif (!IS_IOS && !IS_ANDROID) {\n  PlayProgressBar.prototype.options_.children.push('timeTooltip');\n}\n\nComponent$1.registerComponent('PlayProgressBar', PlayProgressBar);\n\n/**\n * The {@link MouseTimeDisplay} component tracks mouse movement over the\n * {@link ProgressControl}. It displays an indicator and a {@link TimeTooltip}\n * indicating the time which is represented by a given point in the\n * {@link ProgressControl}.\n *\n * @extends Component\n */\n\nvar MouseTimeDisplay = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(MouseTimeDisplay, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The {@link Player} that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function MouseTimeDisplay(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n    _this.update = throttle(bind(_assertThisInitialized(_this), _this.update), UPDATE_REFRESH_INTERVAL);\n    return _this;\n  }\n  /**\n   * Create the DOM element for this class.\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = MouseTimeDisplay.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-mouse-display'\n    });\n  }\n  /**\n   * Enqueues updates to its own DOM as well as the DOM of its\n   * {@link TimeTooltip} child.\n   *\n   * @param {Object} seekBarRect\n   *        The `ClientRect` for the {@link SeekBar} element.\n   *\n   * @param {number} seekBarPoint\n   *        A number from 0 to 1, representing a horizontal reference point\n   *        from the left edge of the {@link SeekBar}\n   */\n  ;\n\n  _proto.update = function update(seekBarRect, seekBarPoint) {\n    var _this2 = this;\n\n    var time = seekBarPoint * this.player_.duration();\n    this.getChild('timeTooltip').updateTime(seekBarRect, seekBarPoint, time, function () {\n      _this2.el_.style.left = seekBarRect.width * seekBarPoint + \"px\";\n    });\n  };\n\n  return MouseTimeDisplay;\n}(Component$1);\n/**\n * Default options for `MouseTimeDisplay`\n *\n * @type {Object}\n * @private\n */\n\n\nMouseTimeDisplay.prototype.options_ = {\n  children: ['timeTooltip']\n};\nComponent$1.registerComponent('MouseTimeDisplay', MouseTimeDisplay);\n\nvar STEP_SECONDS = 5; // The multiplier of STEP_SECONDS that PgUp/PgDown move the timeline.\n\nvar PAGE_KEY_MULTIPLIER = 12;\n/**\n * Seek bar and container for the progress bars. Uses {@link PlayProgressBar}\n * as its `bar`.\n *\n * @extends Slider\n */\n\nvar SeekBar = /*#__PURE__*/function (_Slider) {\n  _inheritsLoose(SeekBar, _Slider);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function SeekBar(player, options) {\n    var _this;\n\n    _this = _Slider.call(this, player, options) || this;\n\n    _this.setEventHandlers_();\n\n    return _this;\n  }\n  /**\n   * Sets the event handlers\n   *\n   * @private\n   */\n\n\n  var _proto = SeekBar.prototype;\n\n  _proto.setEventHandlers_ = function setEventHandlers_() {\n    var _this2 = this;\n\n    this.update_ = bind(this, this.update);\n    this.update = throttle(this.update_, UPDATE_REFRESH_INTERVAL);\n    this.on(this.player_, ['ended', 'durationchange', 'timeupdate'], this.update);\n\n    if (this.player_.liveTracker) {\n      this.on(this.player_.liveTracker, 'liveedgechange', this.update);\n    } // when playing, let's ensure we smoothly update the play progress bar\n    // via an interval\n\n\n    this.updateInterval = null;\n\n    this.enableIntervalHandler_ = function (e) {\n      return _this2.enableInterval_(e);\n    };\n\n    this.disableIntervalHandler_ = function (e) {\n      return _this2.disableInterval_(e);\n    };\n\n    this.on(this.player_, ['playing'], this.enableIntervalHandler_);\n    this.on(this.player_, ['ended', 'pause', 'waiting'], this.disableIntervalHandler_); // we don't need to update the play progress if the document is hidden,\n    // also, this causes the CPU to spike and eventually crash the page on IE11.\n\n    if ('hidden' in document && 'visibilityState' in document) {\n      this.on(document, 'visibilitychange', this.toggleVisibility_);\n    }\n  };\n\n  _proto.toggleVisibility_ = function toggleVisibility_(e) {\n    if (document.visibilityState === 'hidden') {\n      this.cancelNamedAnimationFrame('SeekBar#update');\n      this.cancelNamedAnimationFrame('Slider#update');\n      this.disableInterval_(e);\n    } else {\n      if (!this.player_.ended() && !this.player_.paused()) {\n        this.enableInterval_();\n      } // we just switched back to the page and someone may be looking, so, update ASAP\n\n\n      this.update();\n    }\n  };\n\n  _proto.enableInterval_ = function enableInterval_() {\n    if (this.updateInterval) {\n      return;\n    }\n\n    this.updateInterval = this.setInterval(this.update, UPDATE_REFRESH_INTERVAL);\n  };\n\n  _proto.disableInterval_ = function disableInterval_(e) {\n    if (this.player_.liveTracker && this.player_.liveTracker.isLive() && e && e.type !== 'ended') {\n      return;\n    }\n\n    if (!this.updateInterval) {\n      return;\n    }\n\n    this.clearInterval(this.updateInterval);\n    this.updateInterval = null;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  ;\n\n  _proto.createEl = function createEl() {\n    return _Slider.prototype.createEl.call(this, 'div', {\n      className: 'vjs-progress-holder'\n    }, {\n      'aria-label': this.localize('Progress Bar')\n    });\n  }\n  /**\n   * This function updates the play progress bar and accessibility\n   * attributes to whatever is passed in.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `timeupdate` or `ended` event that caused this to run.\n   *\n   * @listens Player#timeupdate\n   *\n   * @return {number}\n   *          The current percent at a number from 0-1\n   */\n  ;\n\n  _proto.update = function update(event) {\n    var _this3 = this;\n\n    // ignore updates while the tab is hidden\n    if (document.visibilityState === 'hidden') {\n      return;\n    }\n\n    var percent = _Slider.prototype.update.call(this);\n\n    this.requestNamedAnimationFrame('SeekBar#update', function () {\n      var currentTime = _this3.player_.ended() ? _this3.player_.duration() : _this3.getCurrentTime_();\n      var liveTracker = _this3.player_.liveTracker;\n\n      var duration = _this3.player_.duration();\n\n      if (liveTracker && liveTracker.isLive()) {\n        duration = _this3.player_.liveTracker.liveCurrentTime();\n      }\n\n      if (_this3.percent_ !== percent) {\n        // machine readable value of progress bar (percentage complete)\n        _this3.el_.setAttribute('aria-valuenow', (percent * 100).toFixed(2));\n\n        _this3.percent_ = percent;\n      }\n\n      if (_this3.currentTime_ !== currentTime || _this3.duration_ !== duration) {\n        // human readable value of progress bar (time complete)\n        _this3.el_.setAttribute('aria-valuetext', _this3.localize('progress bar timing: currentTime={1} duration={2}', [formatTime(currentTime, duration), formatTime(duration, duration)], '{1} of {2}'));\n\n        _this3.currentTime_ = currentTime;\n        _this3.duration_ = duration;\n      } // update the progress bar time tooltip with the current time\n\n\n      if (_this3.bar) {\n        _this3.bar.update(getBoundingClientRect(_this3.el()), _this3.getProgress());\n      }\n    });\n    return percent;\n  }\n  /**\n   * Prevent liveThreshold from causing seeks to seem like they\n   * are not happening from a user perspective.\n   *\n   * @param {number} ct\n   *        current time to seek to\n   */\n  ;\n\n  _proto.userSeek_ = function userSeek_(ct) {\n    if (this.player_.liveTracker && this.player_.liveTracker.isLive()) {\n      this.player_.liveTracker.nextSeekedFromUser();\n    }\n\n    this.player_.currentTime(ct);\n  }\n  /**\n   * Get the value of current time but allows for smooth scrubbing,\n   * when player can't keep up.\n   *\n   * @return {number}\n   *         The current time value to display\n   *\n   * @private\n   */\n  ;\n\n  _proto.getCurrentTime_ = function getCurrentTime_() {\n    return this.player_.scrubbing() ? this.player_.getCache().currentTime : this.player_.currentTime();\n  }\n  /**\n   * Get the percentage of media played so far.\n   *\n   * @return {number}\n   *         The percentage of media played so far (0 to 1).\n   */\n  ;\n\n  _proto.getPercent = function getPercent() {\n    var currentTime = this.getCurrentTime_();\n    var percent;\n    var liveTracker = this.player_.liveTracker;\n\n    if (liveTracker && liveTracker.isLive()) {\n      percent = (currentTime - liveTracker.seekableStart()) / liveTracker.liveWindow(); // prevent the percent from changing at the live edge\n\n      if (liveTracker.atLiveEdge()) {\n        percent = 1;\n      }\n    } else {\n      percent = currentTime / this.player_.duration();\n    }\n\n    return percent;\n  }\n  /**\n   * Handle mouse down on seek bar\n   *\n   * @param {EventTarget~Event} event\n   *        The `mousedown` event that caused this to run.\n   *\n   * @listens mousedown\n   */\n  ;\n\n  _proto.handleMouseDown = function handleMouseDown(event) {\n    if (!isSingleLeftClick(event)) {\n      return;\n    } // Stop event propagation to prevent double fire in progress-control.js\n\n\n    event.stopPropagation();\n    this.videoWasPlaying = !this.player_.paused();\n    this.player_.pause();\n\n    _Slider.prototype.handleMouseDown.call(this, event);\n  }\n  /**\n   * Handle mouse move on seek bar\n   *\n   * @param {EventTarget~Event} event\n   *        The `mousemove` event that caused this to run.\n   * @param {boolean} mouseDown this is a flag that should be set to true if `handleMouseMove` is called directly. It allows us to skip things that should not happen if coming from mouse down but should happen on regular mouse move handler. Defaults to false\n   *\n   * @listens mousemove\n   */\n  ;\n\n  _proto.handleMouseMove = function handleMouseMove(event, mouseDown) {\n    if (mouseDown === void 0) {\n      mouseDown = false;\n    }\n\n    if (!isSingleLeftClick(event)) {\n      return;\n    }\n\n    if (!mouseDown && !this.player_.scrubbing()) {\n      this.player_.scrubbing(true);\n    }\n\n    var newTime;\n    var distance = this.calculateDistance(event);\n    var liveTracker = this.player_.liveTracker;\n\n    if (!liveTracker || !liveTracker.isLive()) {\n      newTime = distance * this.player_.duration(); // Don't let video end while scrubbing.\n\n      if (newTime === this.player_.duration()) {\n        newTime = newTime - 0.1;\n      }\n    } else {\n      if (distance >= 0.99) {\n        liveTracker.seekToLiveEdge();\n        return;\n      }\n\n      var seekableStart = liveTracker.seekableStart();\n      var seekableEnd = liveTracker.liveCurrentTime();\n      newTime = seekableStart + distance * liveTracker.liveWindow(); // Don't let video end while scrubbing.\n\n      if (newTime >= seekableEnd) {\n        newTime = seekableEnd;\n      } // Compensate for precision differences so that currentTime is not less\n      // than seekable start\n\n\n      if (newTime <= seekableStart) {\n        newTime = seekableStart + 0.1;\n      } // On android seekableEnd can be Infinity sometimes,\n      // this will cause newTime to be Infinity, which is\n      // not a valid currentTime.\n\n\n      if (newTime === Infinity) {\n        return;\n      }\n    } // Set new time (tell player to seek to new time)\n\n\n    this.userSeek_(newTime);\n  };\n\n  _proto.enable = function enable() {\n    _Slider.prototype.enable.call(this);\n\n    var mouseTimeDisplay = this.getChild('mouseTimeDisplay');\n\n    if (!mouseTimeDisplay) {\n      return;\n    }\n\n    mouseTimeDisplay.show();\n  };\n\n  _proto.disable = function disable() {\n    _Slider.prototype.disable.call(this);\n\n    var mouseTimeDisplay = this.getChild('mouseTimeDisplay');\n\n    if (!mouseTimeDisplay) {\n      return;\n    }\n\n    mouseTimeDisplay.hide();\n  }\n  /**\n   * Handle mouse up on seek bar\n   *\n   * @param {EventTarget~Event} event\n   *        The `mouseup` event that caused this to run.\n   *\n   * @listens mouseup\n   */\n  ;\n\n  _proto.handleMouseUp = function handleMouseUp(event) {\n    _Slider.prototype.handleMouseUp.call(this, event); // Stop event propagation to prevent double fire in progress-control.js\n\n\n    if (event) {\n      event.stopPropagation();\n    }\n\n    this.player_.scrubbing(false);\n    /**\n     * Trigger timeupdate because we're done seeking and the time has changed.\n     * This is particularly useful for if the player is paused to time the time displays.\n     *\n     * @event Tech#timeupdate\n     * @type {EventTarget~Event}\n     */\n\n    this.player_.trigger({\n      type: 'timeupdate',\n      target: this,\n      manuallyTriggered: true\n    });\n\n    if (this.videoWasPlaying) {\n      silencePromise(this.player_.play());\n    } else {\n      // We're done seeking and the time has changed.\n      // If the player is paused, make sure we display the correct time on the seek bar.\n      this.update_();\n    }\n  }\n  /**\n   * Move more quickly fast forward for keyboard-only users\n   */\n  ;\n\n  _proto.stepForward = function stepForward() {\n    this.userSeek_(this.player_.currentTime() + STEP_SECONDS);\n  }\n  /**\n   * Move more quickly rewind for keyboard-only users\n   */\n  ;\n\n  _proto.stepBack = function stepBack() {\n    this.userSeek_(this.player_.currentTime() - STEP_SECONDS);\n  }\n  /**\n   * Toggles the playback state of the player\n   * This gets called when enter or space is used on the seekbar\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called\n   *\n   */\n  ;\n\n  _proto.handleAction = function handleAction(event) {\n    if (this.player_.paused()) {\n      this.player_.play();\n    } else {\n      this.player_.pause();\n    }\n  }\n  /**\n   * Called when this SeekBar has focus and a key gets pressed down.\n   * Supports the following keys:\n   *\n   *   Space or Enter key fire a click event\n   *   Home key moves to start of the timeline\n   *   End key moves to end of the timeline\n   *   Digit \"0\" through \"9\" keys move to 0%, 10% ... 80%, 90% of the timeline\n   *   PageDown key moves back a larger step than ArrowDown\n   *   PageUp key moves forward a large step\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    var liveTracker = this.player_.liveTracker;\n\n    if (keycode.isEventKey(event, 'Space') || keycode.isEventKey(event, 'Enter')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.handleAction(event);\n    } else if (keycode.isEventKey(event, 'Home')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.userSeek_(0);\n    } else if (keycode.isEventKey(event, 'End')) {\n      event.preventDefault();\n      event.stopPropagation();\n\n      if (liveTracker && liveTracker.isLive()) {\n        this.userSeek_(liveTracker.liveCurrentTime());\n      } else {\n        this.userSeek_(this.player_.duration());\n      }\n    } else if (/^[0-9]$/.test(keycode(event))) {\n      event.preventDefault();\n      event.stopPropagation();\n      var gotoFraction = (keycode.codes[keycode(event)] - keycode.codes['0']) * 10.0 / 100.0;\n\n      if (liveTracker && liveTracker.isLive()) {\n        this.userSeek_(liveTracker.seekableStart() + liveTracker.liveWindow() * gotoFraction);\n      } else {\n        this.userSeek_(this.player_.duration() * gotoFraction);\n      }\n    } else if (keycode.isEventKey(event, 'PgDn')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.userSeek_(this.player_.currentTime() - STEP_SECONDS * PAGE_KEY_MULTIPLIER);\n    } else if (keycode.isEventKey(event, 'PgUp')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.userSeek_(this.player_.currentTime() + STEP_SECONDS * PAGE_KEY_MULTIPLIER);\n    } else {\n      // Pass keydown handling up for unsupported keys\n      _Slider.prototype.handleKeyDown.call(this, event);\n    }\n  };\n\n  _proto.dispose = function dispose() {\n    this.disableInterval_();\n    this.off(this.player_, ['ended', 'durationchange', 'timeupdate'], this.update);\n\n    if (this.player_.liveTracker) {\n      this.off(this.player_.liveTracker, 'liveedgechange', this.update);\n    }\n\n    this.off(this.player_, ['playing'], this.enableIntervalHandler_);\n    this.off(this.player_, ['ended', 'pause', 'waiting'], this.disableIntervalHandler_); // we don't need to update the play progress if the document is hidden,\n    // also, this causes the CPU to spike and eventually crash the page on IE11.\n\n    if ('hidden' in document && 'visibilityState' in document) {\n      this.off(document, 'visibilitychange', this.toggleVisibility_);\n    }\n\n    _Slider.prototype.dispose.call(this);\n  };\n\n  return SeekBar;\n}(Slider);\n/**\n * Default options for the `SeekBar`\n *\n * @type {Object}\n * @private\n */\n\n\nSeekBar.prototype.options_ = {\n  children: ['loadProgressBar', 'playProgressBar'],\n  barName: 'playProgressBar'\n}; // MouseTimeDisplay tooltips should not be added to a player on mobile devices\n\nif (!IS_IOS && !IS_ANDROID) {\n  SeekBar.prototype.options_.children.splice(1, 0, 'mouseTimeDisplay');\n}\n\nComponent$1.registerComponent('SeekBar', SeekBar);\n\n/**\n * The Progress Control component contains the seek bar, load progress,\n * and play progress.\n *\n * @extends Component\n */\n\nvar ProgressControl = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(ProgressControl, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function ProgressControl(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n    _this.handleMouseMove = throttle(bind(_assertThisInitialized(_this), _this.handleMouseMove), UPDATE_REFRESH_INTERVAL);\n    _this.throttledHandleMouseSeek = throttle(bind(_assertThisInitialized(_this), _this.handleMouseSeek), UPDATE_REFRESH_INTERVAL);\n\n    _this.handleMouseUpHandler_ = function (e) {\n      return _this.handleMouseUp(e);\n    };\n\n    _this.handleMouseDownHandler_ = function (e) {\n      return _this.handleMouseDown(e);\n    };\n\n    _this.enable();\n\n    return _this;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = ProgressControl.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-progress-control vjs-control'\n    });\n  }\n  /**\n   * When the mouse moves over the `ProgressControl`, the pointer position\n   * gets passed down to the `MouseTimeDisplay` component.\n   *\n   * @param {EventTarget~Event} event\n   *        The `mousemove` event that caused this function to run.\n   *\n   * @listen mousemove\n   */\n  ;\n\n  _proto.handleMouseMove = function handleMouseMove(event) {\n    var seekBar = this.getChild('seekBar');\n\n    if (!seekBar) {\n      return;\n    }\n\n    var playProgressBar = seekBar.getChild('playProgressBar');\n    var mouseTimeDisplay = seekBar.getChild('mouseTimeDisplay');\n\n    if (!playProgressBar && !mouseTimeDisplay) {\n      return;\n    }\n\n    var seekBarEl = seekBar.el();\n    var seekBarRect = findPosition(seekBarEl);\n    var seekBarPoint = getPointerPosition(seekBarEl, event).x; // The default skin has a gap on either side of the `SeekBar`. This means\n    // that it's possible to trigger this behavior outside the boundaries of\n    // the `SeekBar`. This ensures we stay within it at all times.\n\n    seekBarPoint = clamp(seekBarPoint, 0, 1);\n\n    if (mouseTimeDisplay) {\n      mouseTimeDisplay.update(seekBarRect, seekBarPoint);\n    }\n\n    if (playProgressBar) {\n      playProgressBar.update(seekBarRect, seekBar.getProgress());\n    }\n  }\n  /**\n   * A throttled version of the {@link ProgressControl#handleMouseSeek} listener.\n   *\n   * @method ProgressControl#throttledHandleMouseSeek\n   * @param {EventTarget~Event} event\n   *        The `mousemove` event that caused this function to run.\n   *\n   * @listen mousemove\n   * @listen touchmove\n   */\n\n  /**\n   * Handle `mousemove` or `touchmove` events on the `ProgressControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown` or `touchstart` event that triggered this function\n   *\n   * @listens mousemove\n   * @listens touchmove\n   */\n  ;\n\n  _proto.handleMouseSeek = function handleMouseSeek(event) {\n    var seekBar = this.getChild('seekBar');\n\n    if (seekBar) {\n      seekBar.handleMouseMove(event);\n    }\n  }\n  /**\n   * Are controls are currently enabled for this progress control.\n   *\n   * @return {boolean}\n   *         true if controls are enabled, false otherwise\n   */\n  ;\n\n  _proto.enabled = function enabled() {\n    return this.enabled_;\n  }\n  /**\n   * Disable all controls on the progress control and its children\n   */\n  ;\n\n  _proto.disable = function disable() {\n    this.children().forEach(function (child) {\n      return child.disable && child.disable();\n    });\n\n    if (!this.enabled()) {\n      return;\n    }\n\n    this.off(['mousedown', 'touchstart'], this.handleMouseDownHandler_);\n    this.off(this.el_, 'mousemove', this.handleMouseMove);\n    this.removeListenersAddedOnMousedownAndTouchstart();\n    this.addClass('disabled');\n    this.enabled_ = false; // Restore normal playback state if controls are disabled while scrubbing\n\n    if (this.player_.scrubbing()) {\n      var seekBar = this.getChild('seekBar');\n      this.player_.scrubbing(false);\n\n      if (seekBar.videoWasPlaying) {\n        silencePromise(this.player_.play());\n      }\n    }\n  }\n  /**\n   * Enable all controls on the progress control and its children\n   */\n  ;\n\n  _proto.enable = function enable() {\n    this.children().forEach(function (child) {\n      return child.enable && child.enable();\n    });\n\n    if (this.enabled()) {\n      return;\n    }\n\n    this.on(['mousedown', 'touchstart'], this.handleMouseDownHandler_);\n    this.on(this.el_, 'mousemove', this.handleMouseMove);\n    this.removeClass('disabled');\n    this.enabled_ = true;\n  }\n  /**\n   * Cleanup listeners after the user finishes interacting with the progress controls\n   */\n  ;\n\n  _proto.removeListenersAddedOnMousedownAndTouchstart = function removeListenersAddedOnMousedownAndTouchstart() {\n    var doc = this.el_.ownerDocument;\n    this.off(doc, 'mousemove', this.throttledHandleMouseSeek);\n    this.off(doc, 'touchmove', this.throttledHandleMouseSeek);\n    this.off(doc, 'mouseup', this.handleMouseUpHandler_);\n    this.off(doc, 'touchend', this.handleMouseUpHandler_);\n  }\n  /**\n   * Handle `mousedown` or `touchstart` events on the `ProgressControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown` or `touchstart` event that triggered this function\n   *\n   * @listens mousedown\n   * @listens touchstart\n   */\n  ;\n\n  _proto.handleMouseDown = function handleMouseDown(event) {\n    var doc = this.el_.ownerDocument;\n    var seekBar = this.getChild('seekBar');\n\n    if (seekBar) {\n      seekBar.handleMouseDown(event);\n    }\n\n    this.on(doc, 'mousemove', this.throttledHandleMouseSeek);\n    this.on(doc, 'touchmove', this.throttledHandleMouseSeek);\n    this.on(doc, 'mouseup', this.handleMouseUpHandler_);\n    this.on(doc, 'touchend', this.handleMouseUpHandler_);\n  }\n  /**\n   * Handle `mouseup` or `touchend` events on the `ProgressControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mouseup` or `touchend` event that triggered this function.\n   *\n   * @listens touchend\n   * @listens mouseup\n   */\n  ;\n\n  _proto.handleMouseUp = function handleMouseUp(event) {\n    var seekBar = this.getChild('seekBar');\n\n    if (seekBar) {\n      seekBar.handleMouseUp(event);\n    }\n\n    this.removeListenersAddedOnMousedownAndTouchstart();\n  };\n\n  return ProgressControl;\n}(Component$1);\n/**\n * Default options for `ProgressControl`\n *\n * @type {Object}\n * @private\n */\n\n\nProgressControl.prototype.options_ = {\n  children: ['seekBar']\n};\nComponent$1.registerComponent('ProgressControl', ProgressControl);\n\n/**\n * Toggle Picture-in-Picture mode\n *\n * @extends Button\n */\n\nvar PictureInPictureToggle = /*#__PURE__*/function (_Button) {\n  _inheritsLoose(PictureInPictureToggle, _Button);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @listens Player#enterpictureinpicture\n   * @listens Player#leavepictureinpicture\n   */\n  function PictureInPictureToggle(player, options) {\n    var _this;\n\n    _this = _Button.call(this, player, options) || this;\n\n    _this.on(player, ['enterpictureinpicture', 'leavepictureinpicture'], function (e) {\n      return _this.handlePictureInPictureChange(e);\n    });\n\n    _this.on(player, ['disablepictureinpicturechanged', 'loadedmetadata'], function (e) {\n      return _this.handlePictureInPictureEnabledChange(e);\n    }); // TODO: Deactivate button on player emptied event.\n\n\n    _this.disable();\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = PictureInPictureToggle.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-picture-in-picture-control \" + _Button.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Enables or disables button based on document.pictureInPictureEnabled property value\n   * or on value returned by player.disablePictureInPicture() method.\n   */\n  ;\n\n  _proto.handlePictureInPictureEnabledChange = function handlePictureInPictureEnabledChange() {\n    if (document.pictureInPictureEnabled && this.player_.disablePictureInPicture() === false) {\n      this.enable();\n    } else {\n      this.disable();\n    }\n  }\n  /**\n   * Handles enterpictureinpicture and leavepictureinpicture on the player and change control text accordingly.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The {@link Player#enterpictureinpicture} or {@link Player#leavepictureinpicture} event that caused this function to be\n   *        called.\n   *\n   * @listens Player#enterpictureinpicture\n   * @listens Player#leavepictureinpicture\n   */\n  ;\n\n  _proto.handlePictureInPictureChange = function handlePictureInPictureChange(event) {\n    if (this.player_.isInPictureInPicture()) {\n      this.controlText('Exit Picture-in-Picture');\n    } else {\n      this.controlText('Picture-in-Picture');\n    }\n\n    this.handlePictureInPictureEnabledChange();\n  }\n  /**\n   * This gets called when an `PictureInPictureToggle` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    if (!this.player_.isInPictureInPicture()) {\n      this.player_.requestPictureInPicture();\n    } else {\n      this.player_.exitPictureInPicture();\n    }\n  };\n\n  return PictureInPictureToggle;\n}(Button);\n/**\n * The text that should display over the `PictureInPictureToggle`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nPictureInPictureToggle.prototype.controlText_ = 'Picture-in-Picture';\nComponent$1.registerComponent('PictureInPictureToggle', PictureInPictureToggle);\n\n/**\n * Toggle fullscreen video\n *\n * @extends Button\n */\n\nvar FullscreenToggle = /*#__PURE__*/function (_Button) {\n  _inheritsLoose(FullscreenToggle, _Button);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function FullscreenToggle(player, options) {\n    var _this;\n\n    _this = _Button.call(this, player, options) || this;\n\n    _this.on(player, 'fullscreenchange', function (e) {\n      return _this.handleFullscreenChange(e);\n    });\n\n    if (document[player.fsApi_.fullscreenEnabled] === false) {\n      _this.disable();\n    }\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = FullscreenToggle.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-fullscreen-control \" + _Button.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Handles fullscreenchange on the player and change control text accordingly.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The {@link Player#fullscreenchange} event that caused this function to be\n   *        called.\n   *\n   * @listens Player#fullscreenchange\n   */\n  ;\n\n  _proto.handleFullscreenChange = function handleFullscreenChange(event) {\n    if (this.player_.isFullscreen()) {\n      this.controlText('Non-Fullscreen');\n    } else {\n      this.controlText('Fullscreen');\n    }\n  }\n  /**\n   * This gets called when an `FullscreenToggle` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    if (!this.player_.isFullscreen()) {\n      this.player_.requestFullscreen();\n    } else {\n      this.player_.exitFullscreen();\n    }\n  };\n\n  return FullscreenToggle;\n}(Button);\n/**\n * The text that should display over the `FullscreenToggle`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nFullscreenToggle.prototype.controlText_ = 'Fullscreen';\nComponent$1.registerComponent('FullscreenToggle', FullscreenToggle);\n\n/**\n * Check if volume control is supported and if it isn't hide the\n * `Component` that was passed  using the `vjs-hidden` class.\n *\n * @param {Component} self\n *        The component that should be hidden if volume is unsupported\n *\n * @param {Player} player\n *        A reference to the player\n *\n * @private\n */\nvar checkVolumeSupport = function checkVolumeSupport(self, player) {\n  // hide volume controls when they're not supported by the current tech\n  if (player.tech_ && !player.tech_.featuresVolumeControl) {\n    self.addClass('vjs-hidden');\n  }\n\n  self.on(player, 'loadstart', function () {\n    if (!player.tech_.featuresVolumeControl) {\n      self.addClass('vjs-hidden');\n    } else {\n      self.removeClass('vjs-hidden');\n    }\n  });\n};\n\n/**\n * Shows volume level\n *\n * @extends Component\n */\n\nvar VolumeLevel = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(VolumeLevel, _Component);\n\n  function VolumeLevel() {\n    return _Component.apply(this, arguments) || this;\n  }\n\n  var _proto = VolumeLevel.prototype;\n\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  _proto.createEl = function createEl() {\n    var el = _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-volume-level'\n    });\n\n    el.appendChild(_Component.prototype.createEl.call(this, 'span', {\n      className: 'vjs-control-text'\n    }));\n    return el;\n  };\n\n  return VolumeLevel;\n}(Component$1);\n\nComponent$1.registerComponent('VolumeLevel', VolumeLevel);\n\n/**\n * Volume level tooltips display a volume above or side by side the volume bar.\n *\n * @extends Component\n */\n\nvar VolumeLevelTooltip = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(VolumeLevelTooltip, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The {@link Player} that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function VolumeLevelTooltip(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n    _this.update = throttle(bind(_assertThisInitialized(_this), _this.update), UPDATE_REFRESH_INTERVAL);\n    return _this;\n  }\n  /**\n   * Create the volume tooltip DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = VolumeLevelTooltip.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-volume-tooltip'\n    }, {\n      'aria-hidden': 'true'\n    });\n  }\n  /**\n   * Updates the position of the tooltip relative to the `VolumeBar` and\n   * its content text.\n   *\n   * @param {Object} rangeBarRect\n   *        The `ClientRect` for the {@link VolumeBar} element.\n   *\n   * @param {number} rangeBarPoint\n   *        A number from 0 to 1, representing a horizontal/vertical reference point\n   *        from the left edge of the {@link VolumeBar}\n   *\n   * @param {boolean} vertical\n   *        Referees to the Volume control position\n   *        in the control bar{@link VolumeControl}\n   *\n   */\n  ;\n\n  _proto.update = function update(rangeBarRect, rangeBarPoint, vertical, content) {\n    if (!vertical) {\n      var tooltipRect = getBoundingClientRect(this.el_);\n      var playerRect = getBoundingClientRect(this.player_.el());\n      var volumeBarPointPx = rangeBarRect.width * rangeBarPoint;\n\n      if (!playerRect || !tooltipRect) {\n        return;\n      }\n\n      var spaceLeftOfPoint = rangeBarRect.left - playerRect.left + volumeBarPointPx;\n      var spaceRightOfPoint = rangeBarRect.width - volumeBarPointPx + (playerRect.right - rangeBarRect.right);\n      var pullTooltipBy = tooltipRect.width / 2;\n\n      if (spaceLeftOfPoint < pullTooltipBy) {\n        pullTooltipBy += pullTooltipBy - spaceLeftOfPoint;\n      } else if (spaceRightOfPoint < pullTooltipBy) {\n        pullTooltipBy = spaceRightOfPoint;\n      }\n\n      if (pullTooltipBy < 0) {\n        pullTooltipBy = 0;\n      } else if (pullTooltipBy > tooltipRect.width) {\n        pullTooltipBy = tooltipRect.width;\n      }\n\n      this.el_.style.right = \"-\" + pullTooltipBy + \"px\";\n    }\n\n    this.write(content + \"%\");\n  }\n  /**\n   * Write the volume to the tooltip DOM element.\n   *\n   * @param {string} content\n   *        The formatted volume for the tooltip.\n   */\n  ;\n\n  _proto.write = function write(content) {\n    textContent(this.el_, content);\n  }\n  /**\n   * Updates the position of the volume tooltip relative to the `VolumeBar`.\n   *\n   * @param {Object} rangeBarRect\n   *        The `ClientRect` for the {@link VolumeBar} element.\n   *\n   * @param {number} rangeBarPoint\n   *        A number from 0 to 1, representing a horizontal/vertical reference point\n   *        from the left edge of the {@link VolumeBar}\n   *\n   * @param {boolean} vertical\n   *        Referees to the Volume control position\n   *        in the control bar{@link VolumeControl}\n   *\n   * @param {number} volume\n   *        The volume level to update the tooltip to\n   *\n   * @param {Function} cb\n   *        A function that will be called during the request animation frame\n   *        for tooltips that need to do additional animations from the default\n   */\n  ;\n\n  _proto.updateVolume = function updateVolume(rangeBarRect, rangeBarPoint, vertical, volume, cb) {\n    var _this2 = this;\n\n    this.requestNamedAnimationFrame('VolumeLevelTooltip#updateVolume', function () {\n      _this2.update(rangeBarRect, rangeBarPoint, vertical, volume.toFixed(0));\n\n      if (cb) {\n        cb();\n      }\n    });\n  };\n\n  return VolumeLevelTooltip;\n}(Component$1);\n\nComponent$1.registerComponent('VolumeLevelTooltip', VolumeLevelTooltip);\n\n/**\n * The {@link MouseVolumeLevelDisplay} component tracks mouse movement over the\n * {@link VolumeControl}. It displays an indicator and a {@link VolumeLevelTooltip}\n * indicating the volume level which is represented by a given point in the\n * {@link VolumeBar}.\n *\n * @extends Component\n */\n\nvar MouseVolumeLevelDisplay = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(MouseVolumeLevelDisplay, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The {@link Player} that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function MouseVolumeLevelDisplay(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n    _this.update = throttle(bind(_assertThisInitialized(_this), _this.update), UPDATE_REFRESH_INTERVAL);\n    return _this;\n  }\n  /**\n   * Create the DOM element for this class.\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = MouseVolumeLevelDisplay.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-mouse-display'\n    });\n  }\n  /**\n   * Enquires updates to its own DOM as well as the DOM of its\n   * {@link VolumeLevelTooltip} child.\n   *\n   * @param {Object} rangeBarRect\n   *        The `ClientRect` for the {@link VolumeBar} element.\n   *\n   * @param {number} rangeBarPoint\n   *        A number from 0 to 1, representing a horizontal/vertical reference point\n   *        from the left edge of the {@link VolumeBar}\n   *\n   * @param {boolean} vertical\n   *        Referees to the Volume control position\n   *        in the control bar{@link VolumeControl}\n   *\n   */\n  ;\n\n  _proto.update = function update(rangeBarRect, rangeBarPoint, vertical) {\n    var _this2 = this;\n\n    var volume = 100 * rangeBarPoint;\n    this.getChild('volumeLevelTooltip').updateVolume(rangeBarRect, rangeBarPoint, vertical, volume, function () {\n      if (vertical) {\n        _this2.el_.style.bottom = rangeBarRect.height * rangeBarPoint + \"px\";\n      } else {\n        _this2.el_.style.left = rangeBarRect.width * rangeBarPoint + \"px\";\n      }\n    });\n  };\n\n  return MouseVolumeLevelDisplay;\n}(Component$1);\n/**\n * Default options for `MouseVolumeLevelDisplay`\n *\n * @type {Object}\n * @private\n */\n\n\nMouseVolumeLevelDisplay.prototype.options_ = {\n  children: ['volumeLevelTooltip']\n};\nComponent$1.registerComponent('MouseVolumeLevelDisplay', MouseVolumeLevelDisplay);\n\n/**\n * The bar that contains the volume level and can be clicked on to adjust the level\n *\n * @extends Slider\n */\n\nvar VolumeBar = /*#__PURE__*/function (_Slider) {\n  _inheritsLoose(VolumeBar, _Slider);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function VolumeBar(player, options) {\n    var _this;\n\n    _this = _Slider.call(this, player, options) || this;\n\n    _this.on('slideractive', function (e) {\n      return _this.updateLastVolume_(e);\n    });\n\n    _this.on(player, 'volumechange', function (e) {\n      return _this.updateARIAAttributes(e);\n    });\n\n    player.ready(function () {\n      return _this.updateARIAAttributes();\n    });\n    return _this;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = VolumeBar.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Slider.prototype.createEl.call(this, 'div', {\n      className: 'vjs-volume-bar vjs-slider-bar'\n    }, {\n      'aria-label': this.localize('Volume Level'),\n      'aria-live': 'polite'\n    });\n  }\n  /**\n   * Handle mouse down on volume bar\n   *\n   * @param {EventTarget~Event} event\n   *        The `mousedown` event that caused this to run.\n   *\n   * @listens mousedown\n   */\n  ;\n\n  _proto.handleMouseDown = function handleMouseDown(event) {\n    if (!isSingleLeftClick(event)) {\n      return;\n    }\n\n    _Slider.prototype.handleMouseDown.call(this, event);\n  }\n  /**\n   * Handle movement events on the {@link VolumeMenuButton}.\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to run.\n   *\n   * @listens mousemove\n   */\n  ;\n\n  _proto.handleMouseMove = function handleMouseMove(event) {\n    var mouseVolumeLevelDisplay = this.getChild('mouseVolumeLevelDisplay');\n\n    if (mouseVolumeLevelDisplay) {\n      var volumeBarEl = this.el();\n      var volumeBarRect = getBoundingClientRect(volumeBarEl);\n      var vertical = this.vertical();\n      var volumeBarPoint = getPointerPosition(volumeBarEl, event);\n      volumeBarPoint = vertical ? volumeBarPoint.y : volumeBarPoint.x; // The default skin has a gap on either side of the `VolumeBar`. This means\n      // that it's possible to trigger this behavior outside the boundaries of\n      // the `VolumeBar`. This ensures we stay within it at all times.\n\n      volumeBarPoint = clamp(volumeBarPoint, 0, 1);\n      mouseVolumeLevelDisplay.update(volumeBarRect, volumeBarPoint, vertical);\n    }\n\n    if (!isSingleLeftClick(event)) {\n      return;\n    }\n\n    this.checkMuted();\n    this.player_.volume(this.calculateDistance(event));\n  }\n  /**\n   * If the player is muted unmute it.\n   */\n  ;\n\n  _proto.checkMuted = function checkMuted() {\n    if (this.player_.muted()) {\n      this.player_.muted(false);\n    }\n  }\n  /**\n   * Get percent of volume level\n   *\n   * @return {number}\n   *         Volume level percent as a decimal number.\n   */\n  ;\n\n  _proto.getPercent = function getPercent() {\n    if (this.player_.muted()) {\n      return 0;\n    }\n\n    return this.player_.volume();\n  }\n  /**\n   * Increase volume level for keyboard users\n   */\n  ;\n\n  _proto.stepForward = function stepForward() {\n    this.checkMuted();\n    this.player_.volume(this.player_.volume() + 0.1);\n  }\n  /**\n   * Decrease volume level for keyboard users\n   */\n  ;\n\n  _proto.stepBack = function stepBack() {\n    this.checkMuted();\n    this.player_.volume(this.player_.volume() - 0.1);\n  }\n  /**\n   * Update ARIA accessibility attributes\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `volumechange` event that caused this function to run.\n   *\n   * @listens Player#volumechange\n   */\n  ;\n\n  _proto.updateARIAAttributes = function updateARIAAttributes(event) {\n    var ariaValue = this.player_.muted() ? 0 : this.volumeAsPercentage_();\n    this.el_.setAttribute('aria-valuenow', ariaValue);\n    this.el_.setAttribute('aria-valuetext', ariaValue + '%');\n  }\n  /**\n   * Returns the current value of the player volume as a percentage\n   *\n   * @private\n   */\n  ;\n\n  _proto.volumeAsPercentage_ = function volumeAsPercentage_() {\n    return Math.round(this.player_.volume() * 100);\n  }\n  /**\n   * When user starts dragging the VolumeBar, store the volume and listen for\n   * the end of the drag. When the drag ends, if the volume was set to zero,\n   * set lastVolume to the stored volume.\n   *\n   * @listens slideractive\n   * @private\n   */\n  ;\n\n  _proto.updateLastVolume_ = function updateLastVolume_() {\n    var _this2 = this;\n\n    var volumeBeforeDrag = this.player_.volume();\n    this.one('sliderinactive', function () {\n      if (_this2.player_.volume() === 0) {\n        _this2.player_.lastVolume_(volumeBeforeDrag);\n      }\n    });\n  };\n\n  return VolumeBar;\n}(Slider);\n/**\n * Default options for the `VolumeBar`\n *\n * @type {Object}\n * @private\n */\n\n\nVolumeBar.prototype.options_ = {\n  children: ['volumeLevel'],\n  barName: 'volumeLevel'\n}; // MouseVolumeLevelDisplay tooltip should not be added to a player on mobile devices\n\nif (!IS_IOS && !IS_ANDROID) {\n  VolumeBar.prototype.options_.children.splice(0, 0, 'mouseVolumeLevelDisplay');\n}\n/**\n * Call the update event for this Slider when this event happens on the player.\n *\n * @type {string}\n */\n\n\nVolumeBar.prototype.playerEvent = 'volumechange';\nComponent$1.registerComponent('VolumeBar', VolumeBar);\n\n/**\n * The component for controlling the volume level\n *\n * @extends Component\n */\n\nvar VolumeControl = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(VolumeControl, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   */\n  function VolumeControl(player, options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    options.vertical = options.vertical || false; // Pass the vertical option down to the VolumeBar if\n    // the VolumeBar is turned on.\n\n    if (typeof options.volumeBar === 'undefined' || isPlain(options.volumeBar)) {\n      options.volumeBar = options.volumeBar || {};\n      options.volumeBar.vertical = options.vertical;\n    }\n\n    _this = _Component.call(this, player, options) || this; // hide this control if volume support is missing\n\n    checkVolumeSupport(_assertThisInitialized(_this), player);\n    _this.throttledHandleMouseMove = throttle(bind(_assertThisInitialized(_this), _this.handleMouseMove), UPDATE_REFRESH_INTERVAL);\n\n    _this.handleMouseUpHandler_ = function (e) {\n      return _this.handleMouseUp(e);\n    };\n\n    _this.on('mousedown', function (e) {\n      return _this.handleMouseDown(e);\n    });\n\n    _this.on('touchstart', function (e) {\n      return _this.handleMouseDown(e);\n    });\n\n    _this.on('mousemove', function (e) {\n      return _this.handleMouseMove(e);\n    }); // while the slider is active (the mouse has been pressed down and\n    // is dragging) or in focus we do not want to hide the VolumeBar\n\n\n    _this.on(_this.volumeBar, ['focus', 'slideractive'], function () {\n      _this.volumeBar.addClass('vjs-slider-active');\n\n      _this.addClass('vjs-slider-active');\n\n      _this.trigger('slideractive');\n    });\n\n    _this.on(_this.volumeBar, ['blur', 'sliderinactive'], function () {\n      _this.volumeBar.removeClass('vjs-slider-active');\n\n      _this.removeClass('vjs-slider-active');\n\n      _this.trigger('sliderinactive');\n    });\n\n    return _this;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = VolumeControl.prototype;\n\n  _proto.createEl = function createEl() {\n    var orientationClass = 'vjs-volume-horizontal';\n\n    if (this.options_.vertical) {\n      orientationClass = 'vjs-volume-vertical';\n    }\n\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: \"vjs-volume-control vjs-control \" + orientationClass\n    });\n  }\n  /**\n   * Handle `mousedown` or `touchstart` events on the `VolumeControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown` or `touchstart` event that triggered this function\n   *\n   * @listens mousedown\n   * @listens touchstart\n   */\n  ;\n\n  _proto.handleMouseDown = function handleMouseDown(event) {\n    var doc = this.el_.ownerDocument;\n    this.on(doc, 'mousemove', this.throttledHandleMouseMove);\n    this.on(doc, 'touchmove', this.throttledHandleMouseMove);\n    this.on(doc, 'mouseup', this.handleMouseUpHandler_);\n    this.on(doc, 'touchend', this.handleMouseUpHandler_);\n  }\n  /**\n   * Handle `mouseup` or `touchend` events on the `VolumeControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mouseup` or `touchend` event that triggered this function.\n   *\n   * @listens touchend\n   * @listens mouseup\n   */\n  ;\n\n  _proto.handleMouseUp = function handleMouseUp(event) {\n    var doc = this.el_.ownerDocument;\n    this.off(doc, 'mousemove', this.throttledHandleMouseMove);\n    this.off(doc, 'touchmove', this.throttledHandleMouseMove);\n    this.off(doc, 'mouseup', this.handleMouseUpHandler_);\n    this.off(doc, 'touchend', this.handleMouseUpHandler_);\n  }\n  /**\n   * Handle `mousedown` or `touchstart` events on the `VolumeControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown` or `touchstart` event that triggered this function\n   *\n   * @listens mousedown\n   * @listens touchstart\n   */\n  ;\n\n  _proto.handleMouseMove = function handleMouseMove(event) {\n    this.volumeBar.handleMouseMove(event);\n  };\n\n  return VolumeControl;\n}(Component$1);\n/**\n * Default options for the `VolumeControl`\n *\n * @type {Object}\n * @private\n */\n\n\nVolumeControl.prototype.options_ = {\n  children: ['volumeBar']\n};\nComponent$1.registerComponent('VolumeControl', VolumeControl);\n\n/**\n * Check if muting volume is supported and if it isn't hide the mute toggle\n * button.\n *\n * @param {Component} self\n *        A reference to the mute toggle button\n *\n * @param {Player} player\n *        A reference to the player\n *\n * @private\n */\nvar checkMuteSupport = function checkMuteSupport(self, player) {\n  // hide mute toggle button if it's not supported by the current tech\n  if (player.tech_ && !player.tech_.featuresMuteControl) {\n    self.addClass('vjs-hidden');\n  }\n\n  self.on(player, 'loadstart', function () {\n    if (!player.tech_.featuresMuteControl) {\n      self.addClass('vjs-hidden');\n    } else {\n      self.removeClass('vjs-hidden');\n    }\n  });\n};\n\n/**\n * A button component for muting the audio.\n *\n * @extends Button\n */\n\nvar MuteToggle = /*#__PURE__*/function (_Button) {\n  _inheritsLoose(MuteToggle, _Button);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function MuteToggle(player, options) {\n    var _this;\n\n    _this = _Button.call(this, player, options) || this; // hide this control if volume support is missing\n\n    checkMuteSupport(_assertThisInitialized(_this), player);\n\n    _this.on(player, ['loadstart', 'volumechange'], function (e) {\n      return _this.update(e);\n    });\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = MuteToggle.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-mute-control \" + _Button.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * This gets called when an `MuteToggle` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    var vol = this.player_.volume();\n    var lastVolume = this.player_.lastVolume_();\n\n    if (vol === 0) {\n      var volumeToSet = lastVolume < 0.1 ? 0.1 : lastVolume;\n      this.player_.volume(volumeToSet);\n      this.player_.muted(false);\n    } else {\n      this.player_.muted(this.player_.muted() ? false : true);\n    }\n  }\n  /**\n   * Update the `MuteToggle` button based on the state of `volume` and `muted`\n   * on the player.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The {@link Player#loadstart} event if this function was called\n   *        through an event.\n   *\n   * @listens Player#loadstart\n   * @listens Player#volumechange\n   */\n  ;\n\n  _proto.update = function update(event) {\n    this.updateIcon_();\n    this.updateControlText_();\n  }\n  /**\n   * Update the appearance of the `MuteToggle` icon.\n   *\n   * Possible states (given `level` variable below):\n   * - 0: crossed out\n   * - 1: zero bars of volume\n   * - 2: one bar of volume\n   * - 3: two bars of volume\n   *\n   * @private\n   */\n  ;\n\n  _proto.updateIcon_ = function updateIcon_() {\n    var vol = this.player_.volume();\n    var level = 3; // in iOS when a player is loaded with muted attribute\n    // and volume is changed with a native mute button\n    // we want to make sure muted state is updated\n\n    if (IS_IOS && this.player_.tech_ && this.player_.tech_.el_) {\n      this.player_.muted(this.player_.tech_.el_.muted);\n    }\n\n    if (vol === 0 || this.player_.muted()) {\n      level = 0;\n    } else if (vol < 0.33) {\n      level = 1;\n    } else if (vol < 0.67) {\n      level = 2;\n    } // TODO improve muted icon classes\n\n\n    for (var i = 0; i < 4; i++) {\n      removeClass(this.el_, \"vjs-vol-\" + i);\n    }\n\n    addClass(this.el_, \"vjs-vol-\" + level);\n  }\n  /**\n   * If `muted` has changed on the player, update the control text\n   * (`title` attribute on `vjs-mute-control` element and content of\n   * `vjs-control-text` element).\n   *\n   * @private\n   */\n  ;\n\n  _proto.updateControlText_ = function updateControlText_() {\n    var soundOff = this.player_.muted() || this.player_.volume() === 0;\n    var text = soundOff ? 'Unmute' : 'Mute';\n\n    if (this.controlText() !== text) {\n      this.controlText(text);\n    }\n  };\n\n  return MuteToggle;\n}(Button);\n/**\n * The text that should display over the `MuteToggle`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nMuteToggle.prototype.controlText_ = 'Mute';\nComponent$1.registerComponent('MuteToggle', MuteToggle);\n\n/**\n * A Component to contain the MuteToggle and VolumeControl so that\n * they can work together.\n *\n * @extends Component\n */\n\nvar VolumePanel = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(VolumePanel, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   */\n  function VolumePanel(player, options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    if (typeof options.inline !== 'undefined') {\n      options.inline = options.inline;\n    } else {\n      options.inline = true;\n    } // pass the inline option down to the VolumeControl as vertical if\n    // the VolumeControl is on.\n\n\n    if (typeof options.volumeControl === 'undefined' || isPlain(options.volumeControl)) {\n      options.volumeControl = options.volumeControl || {};\n      options.volumeControl.vertical = !options.inline;\n    }\n\n    _this = _Component.call(this, player, options) || this; // this handler is used by mouse handler methods below\n\n    _this.handleKeyPressHandler_ = function (e) {\n      return _this.handleKeyPress(e);\n    };\n\n    _this.on(player, ['loadstart'], function (e) {\n      return _this.volumePanelState_(e);\n    });\n\n    _this.on(_this.muteToggle, 'keyup', function (e) {\n      return _this.handleKeyPress(e);\n    });\n\n    _this.on(_this.volumeControl, 'keyup', function (e) {\n      return _this.handleVolumeControlKeyUp(e);\n    });\n\n    _this.on('keydown', function (e) {\n      return _this.handleKeyPress(e);\n    });\n\n    _this.on('mouseover', function (e) {\n      return _this.handleMouseOver(e);\n    });\n\n    _this.on('mouseout', function (e) {\n      return _this.handleMouseOut(e);\n    }); // while the slider is active (the mouse has been pressed down and\n    // is dragging) we do not want to hide the VolumeBar\n\n\n    _this.on(_this.volumeControl, ['slideractive'], _this.sliderActive_);\n\n    _this.on(_this.volumeControl, ['sliderinactive'], _this.sliderInactive_);\n\n    return _this;\n  }\n  /**\n   * Add vjs-slider-active class to the VolumePanel\n   *\n   * @listens VolumeControl#slideractive\n   * @private\n   */\n\n\n  var _proto = VolumePanel.prototype;\n\n  _proto.sliderActive_ = function sliderActive_() {\n    this.addClass('vjs-slider-active');\n  }\n  /**\n   * Removes vjs-slider-active class to the VolumePanel\n   *\n   * @listens VolumeControl#sliderinactive\n   * @private\n   */\n  ;\n\n  _proto.sliderInactive_ = function sliderInactive_() {\n    this.removeClass('vjs-slider-active');\n  }\n  /**\n   * Adds vjs-hidden or vjs-mute-toggle-only to the VolumePanel\n   * depending on MuteToggle and VolumeControl state\n   *\n   * @listens Player#loadstart\n   * @private\n   */\n  ;\n\n  _proto.volumePanelState_ = function volumePanelState_() {\n    // hide volume panel if neither volume control or mute toggle\n    // are displayed\n    if (this.volumeControl.hasClass('vjs-hidden') && this.muteToggle.hasClass('vjs-hidden')) {\n      this.addClass('vjs-hidden');\n    } // if only mute toggle is visible we don't want\n    // volume panel expanding when hovered or active\n\n\n    if (this.volumeControl.hasClass('vjs-hidden') && !this.muteToggle.hasClass('vjs-hidden')) {\n      this.addClass('vjs-mute-toggle-only');\n    }\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  ;\n\n  _proto.createEl = function createEl() {\n    var orientationClass = 'vjs-volume-panel-horizontal';\n\n    if (!this.options_.inline) {\n      orientationClass = 'vjs-volume-panel-vertical';\n    }\n\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: \"vjs-volume-panel vjs-control \" + orientationClass\n    });\n  }\n  /**\n   * Dispose of the `volume-panel` and all child components.\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    this.handleMouseOut();\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Handles `keyup` events on the `VolumeControl`, looking for ESC, which closes\n   * the volume panel and sets focus on `MuteToggle`.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keyup` event that caused this function to be called.\n   *\n   * @listens keyup\n   */\n  ;\n\n  _proto.handleVolumeControlKeyUp = function handleVolumeControlKeyUp(event) {\n    if (keycode.isEventKey(event, 'Esc')) {\n      this.muteToggle.focus();\n    }\n  }\n  /**\n   * This gets called when a `VolumePanel` gains hover via a `mouseover` event.\n   * Turns on listening for `mouseover` event. When they happen it\n   * calls `this.handleMouseOver`.\n   *\n   * @param {EventTarget~Event} event\n   *        The `mouseover` event that caused this function to be called.\n   *\n   * @listens mouseover\n   */\n  ;\n\n  _proto.handleMouseOver = function handleMouseOver(event) {\n    this.addClass('vjs-hover');\n    on(document, 'keyup', this.handleKeyPressHandler_);\n  }\n  /**\n   * This gets called when a `VolumePanel` gains hover via a `mouseout` event.\n   * Turns on listening for `mouseout` event. When they happen it\n   * calls `this.handleMouseOut`.\n   *\n   * @param {EventTarget~Event} event\n   *        The `mouseout` event that caused this function to be called.\n   *\n   * @listens mouseout\n   */\n  ;\n\n  _proto.handleMouseOut = function handleMouseOut(event) {\n    this.removeClass('vjs-hover');\n    off(document, 'keyup', this.handleKeyPressHandler_);\n  }\n  /**\n   * Handles `keyup` event on the document or `keydown` event on the `VolumePanel`,\n   * looking for ESC, which hides the `VolumeControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        The keypress that triggered this event.\n   *\n   * @listens keydown | keyup\n   */\n  ;\n\n  _proto.handleKeyPress = function handleKeyPress(event) {\n    if (keycode.isEventKey(event, 'Esc')) {\n      this.handleMouseOut();\n    }\n  };\n\n  return VolumePanel;\n}(Component$1);\n/**\n * Default options for the `VolumeControl`\n *\n * @type {Object}\n * @private\n */\n\n\nVolumePanel.prototype.options_ = {\n  children: ['muteToggle', 'volumeControl']\n};\nComponent$1.registerComponent('VolumePanel', VolumePanel);\n\n/**\n * The Menu component is used to build popup menus, including subtitle and\n * captions selection menus.\n *\n * @extends Component\n */\n\nvar Menu = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(Menu, _Component);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Player} player\n   *        the player that this component should attach to\n   *\n   * @param {Object} [options]\n   *        Object of option names and values\n   *\n   */\n  function Menu(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n\n    if (options) {\n      _this.menuButton_ = options.menuButton;\n    }\n\n    _this.focusedChild_ = -1;\n\n    _this.on('keydown', function (e) {\n      return _this.handleKeyDown(e);\n    }); // All the menu item instances share the same blur handler provided by the menu container.\n\n\n    _this.boundHandleBlur_ = function (e) {\n      return _this.handleBlur(e);\n    };\n\n    _this.boundHandleTapClick_ = function (e) {\n      return _this.handleTapClick(e);\n    };\n\n    return _this;\n  }\n  /**\n   * Add event listeners to the {@link MenuItem}.\n   *\n   * @param {Object} component\n   *        The instance of the `MenuItem` to add listeners to.\n   *\n   */\n\n\n  var _proto = Menu.prototype;\n\n  _proto.addEventListenerForItem = function addEventListenerForItem(component) {\n    if (!(component instanceof Component$1)) {\n      return;\n    }\n\n    this.on(component, 'blur', this.boundHandleBlur_);\n    this.on(component, ['tap', 'click'], this.boundHandleTapClick_);\n  }\n  /**\n   * Remove event listeners from the {@link MenuItem}.\n   *\n   * @param {Object} component\n   *        The instance of the `MenuItem` to remove listeners.\n   *\n   */\n  ;\n\n  _proto.removeEventListenerForItem = function removeEventListenerForItem(component) {\n    if (!(component instanceof Component$1)) {\n      return;\n    }\n\n    this.off(component, 'blur', this.boundHandleBlur_);\n    this.off(component, ['tap', 'click'], this.boundHandleTapClick_);\n  }\n  /**\n   * This method will be called indirectly when the component has been added\n   * before the component adds to the new menu instance by `addItem`.\n   * In this case, the original menu instance will remove the component\n   * by calling `removeChild`.\n   *\n   * @param {Object} component\n   *        The instance of the `MenuItem`\n   */\n  ;\n\n  _proto.removeChild = function removeChild(component) {\n    if (typeof component === 'string') {\n      component = this.getChild(component);\n    }\n\n    this.removeEventListenerForItem(component);\n\n    _Component.prototype.removeChild.call(this, component);\n  }\n  /**\n   * Add a {@link MenuItem} to the menu.\n   *\n   * @param {Object|string} component\n   *        The name or instance of the `MenuItem` to add.\n   *\n   */\n  ;\n\n  _proto.addItem = function addItem(component) {\n    var childComponent = this.addChild(component);\n\n    if (childComponent) {\n      this.addEventListenerForItem(childComponent);\n    }\n  }\n  /**\n   * Create the `Menu`s DOM element.\n   *\n   * @return {Element}\n   *         the element that was created\n   */\n  ;\n\n  _proto.createEl = function createEl$1() {\n    var contentElType = this.options_.contentElType || 'ul';\n    this.contentEl_ = createEl(contentElType, {\n      className: 'vjs-menu-content'\n    });\n    this.contentEl_.setAttribute('role', 'menu');\n\n    var el = _Component.prototype.createEl.call(this, 'div', {\n      append: this.contentEl_,\n      className: 'vjs-menu'\n    });\n\n    el.appendChild(this.contentEl_); // Prevent clicks from bubbling up. Needed for Menu Buttons,\n    // where a click on the parent is significant\n\n    on(el, 'click', function (event) {\n      event.preventDefault();\n      event.stopImmediatePropagation();\n    });\n    return el;\n  };\n\n  _proto.dispose = function dispose() {\n    this.contentEl_ = null;\n    this.boundHandleBlur_ = null;\n    this.boundHandleTapClick_ = null;\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Called when a `MenuItem` loses focus.\n   *\n   * @param {EventTarget~Event} event\n   *        The `blur` event that caused this function to be called.\n   *\n   * @listens blur\n   */\n  ;\n\n  _proto.handleBlur = function handleBlur(event) {\n    var relatedTarget = event.relatedTarget || document.activeElement; // Close menu popup when a user clicks outside the menu\n\n    if (!this.children().some(function (element) {\n      return element.el() === relatedTarget;\n    })) {\n      var btn = this.menuButton_;\n\n      if (btn && btn.buttonPressed_ && relatedTarget !== btn.el().firstChild) {\n        btn.unpressButton();\n      }\n    }\n  }\n  /**\n   * Called when a `MenuItem` gets clicked or tapped.\n   *\n   * @param {EventTarget~Event} event\n   *        The `click` or `tap` event that caused this function to be called.\n   *\n   * @listens click,tap\n   */\n  ;\n\n  _proto.handleTapClick = function handleTapClick(event) {\n    // Unpress the associated MenuButton, and move focus back to it\n    if (this.menuButton_) {\n      this.menuButton_.unpressButton();\n      var childComponents = this.children();\n\n      if (!Array.isArray(childComponents)) {\n        return;\n      }\n\n      var foundComponent = childComponents.filter(function (component) {\n        return component.el() === event.target;\n      })[0];\n\n      if (!foundComponent) {\n        return;\n      } // don't focus menu button if item is a caption settings item\n      // because focus will move elsewhere\n\n\n      if (foundComponent.name() !== 'CaptionSettingsMenuItem') {\n        this.menuButton_.focus();\n      }\n    }\n  }\n  /**\n   * Handle a `keydown` event on this menu. This listener is added in the constructor.\n   *\n   * @param {EventTarget~Event} event\n   *        A `keydown` event that happened on the menu.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    // Left and Down Arrows\n    if (keycode.isEventKey(event, 'Left') || keycode.isEventKey(event, 'Down')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.stepForward(); // Up and Right Arrows\n    } else if (keycode.isEventKey(event, 'Right') || keycode.isEventKey(event, 'Up')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.stepBack();\n    }\n  }\n  /**\n   * Move to next (lower) menu item for keyboard users.\n   */\n  ;\n\n  _proto.stepForward = function stepForward() {\n    var stepChild = 0;\n\n    if (this.focusedChild_ !== undefined) {\n      stepChild = this.focusedChild_ + 1;\n    }\n\n    this.focus(stepChild);\n  }\n  /**\n   * Move to previous (higher) menu item for keyboard users.\n   */\n  ;\n\n  _proto.stepBack = function stepBack() {\n    var stepChild = 0;\n\n    if (this.focusedChild_ !== undefined) {\n      stepChild = this.focusedChild_ - 1;\n    }\n\n    this.focus(stepChild);\n  }\n  /**\n   * Set focus on a {@link MenuItem} in the `Menu`.\n   *\n   * @param {Object|string} [item=0]\n   *        Index of child item set focus on.\n   */\n  ;\n\n  _proto.focus = function focus(item) {\n    if (item === void 0) {\n      item = 0;\n    }\n\n    var children = this.children().slice();\n    var haveTitle = children.length && children[0].hasClass('vjs-menu-title');\n\n    if (haveTitle) {\n      children.shift();\n    }\n\n    if (children.length > 0) {\n      if (item < 0) {\n        item = 0;\n      } else if (item >= children.length) {\n        item = children.length - 1;\n      }\n\n      this.focusedChild_ = item;\n      children[item].el_.focus();\n    }\n  };\n\n  return Menu;\n}(Component$1);\n\nComponent$1.registerComponent('Menu', Menu);\n\n/**\n * A `MenuButton` class for any popup {@link Menu}.\n *\n * @extends Component\n */\n\nvar MenuButton = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(MenuButton, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   */\n  function MenuButton(player, options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    _this = _Component.call(this, player, options) || this;\n    _this.menuButton_ = new Button(player, options);\n\n    _this.menuButton_.controlText(_this.controlText_);\n\n    _this.menuButton_.el_.setAttribute('aria-haspopup', 'true'); // Add buildCSSClass values to the button, not the wrapper\n\n\n    var buttonClass = Button.prototype.buildCSSClass();\n    _this.menuButton_.el_.className = _this.buildCSSClass() + ' ' + buttonClass;\n\n    _this.menuButton_.removeClass('vjs-control');\n\n    _this.addChild(_this.menuButton_);\n\n    _this.update();\n\n    _this.enabled_ = true;\n\n    var handleClick = function handleClick(e) {\n      return _this.handleClick(e);\n    };\n\n    _this.handleMenuKeyUp_ = function (e) {\n      return _this.handleMenuKeyUp(e);\n    };\n\n    _this.on(_this.menuButton_, 'tap', handleClick);\n\n    _this.on(_this.menuButton_, 'click', handleClick);\n\n    _this.on(_this.menuButton_, 'keydown', function (e) {\n      return _this.handleKeyDown(e);\n    });\n\n    _this.on(_this.menuButton_, 'mouseenter', function () {\n      _this.addClass('vjs-hover');\n\n      _this.menu.show();\n\n      on(document, 'keyup', _this.handleMenuKeyUp_);\n    });\n\n    _this.on('mouseleave', function (e) {\n      return _this.handleMouseLeave(e);\n    });\n\n    _this.on('keydown', function (e) {\n      return _this.handleSubmenuKeyDown(e);\n    });\n\n    return _this;\n  }\n  /**\n   * Update the menu based on the current state of its items.\n   */\n\n\n  var _proto = MenuButton.prototype;\n\n  _proto.update = function update() {\n    var menu = this.createMenu();\n\n    if (this.menu) {\n      this.menu.dispose();\n      this.removeChild(this.menu);\n    }\n\n    this.menu = menu;\n    this.addChild(menu);\n    /**\n     * Track the state of the menu button\n     *\n     * @type {Boolean}\n     * @private\n     */\n\n    this.buttonPressed_ = false;\n    this.menuButton_.el_.setAttribute('aria-expanded', 'false');\n\n    if (this.items && this.items.length <= this.hideThreshold_) {\n      this.hide();\n    } else {\n      this.show();\n    }\n  }\n  /**\n   * Create the menu and add all items to it.\n   *\n   * @return {Menu}\n   *         The constructed menu\n   */\n  ;\n\n  _proto.createMenu = function createMenu() {\n    var menu = new Menu(this.player_, {\n      menuButton: this\n    });\n    /**\n     * Hide the menu if the number of items is less than or equal to this threshold. This defaults\n     * to 0 and whenever we add items which can be hidden to the menu we'll increment it. We list\n     * it here because every time we run `createMenu` we need to reset the value.\n     *\n     * @protected\n     * @type {Number}\n     */\n\n    this.hideThreshold_ = 0; // Add a title list item to the top\n\n    if (this.options_.title) {\n      var titleEl = createEl('li', {\n        className: 'vjs-menu-title',\n        textContent: toTitleCase$1(this.options_.title),\n        tabIndex: -1\n      });\n      var titleComponent = new Component$1(this.player_, {\n        el: titleEl\n      });\n      menu.addItem(titleComponent);\n    }\n\n    this.items = this.createItems();\n\n    if (this.items) {\n      // Add menu items to the menu\n      for (var i = 0; i < this.items.length; i++) {\n        menu.addItem(this.items[i]);\n      }\n    }\n\n    return menu;\n  }\n  /**\n   * Create the list of menu items. Specific to each subclass.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.createItems = function createItems() {}\n  /**\n   * Create the `MenuButtons`s DOM element.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n  ;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: this.buildWrapperCSSClass()\n    }, {});\n  }\n  /**\n   * Allow sub components to stack CSS class names for the wrapper element\n   *\n   * @return {string}\n   *         The constructed wrapper DOM `className`\n   */\n  ;\n\n  _proto.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    var menuButtonClass = 'vjs-menu-button'; // If the inline option is passed, we want to use different styles altogether.\n\n    if (this.options_.inline === true) {\n      menuButtonClass += '-inline';\n    } else {\n      menuButtonClass += '-popup';\n    } // TODO: Fix the CSS so that this isn't necessary\n\n\n    var buttonClass = Button.prototype.buildCSSClass();\n    return \"vjs-menu-button \" + menuButtonClass + \" \" + buttonClass + \" \" + _Component.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n  ;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    var menuButtonClass = 'vjs-menu-button'; // If the inline option is passed, we want to use different styles altogether.\n\n    if (this.options_.inline === true) {\n      menuButtonClass += '-inline';\n    } else {\n      menuButtonClass += '-popup';\n    }\n\n    return \"vjs-menu-button \" + menuButtonClass + \" \" + _Component.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Get or set the localized control text that will be used for accessibility.\n   *\n   * > NOTE: This will come from the internal `menuButton_` element.\n   *\n   * @param {string} [text]\n   *        Control text for element.\n   *\n   * @param {Element} [el=this.menuButton_.el()]\n   *        Element to set the title on.\n   *\n   * @return {string}\n   *         - The control text when getting\n   */\n  ;\n\n  _proto.controlText = function controlText(text, el) {\n    if (el === void 0) {\n      el = this.menuButton_.el();\n    }\n\n    return this.menuButton_.controlText(text, el);\n  }\n  /**\n   * Dispose of the `menu-button` and all child components.\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    this.handleMouseLeave();\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Handle a click on a `MenuButton`.\n   * See {@link ClickableComponent#handleClick} for instances where this is called.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    if (this.buttonPressed_) {\n      this.unpressButton();\n    } else {\n      this.pressButton();\n    }\n  }\n  /**\n   * Handle `mouseleave` for `MenuButton`.\n   *\n   * @param {EventTarget~Event} event\n   *        The `mouseleave` event that caused this function to be called.\n   *\n   * @listens mouseleave\n   */\n  ;\n\n  _proto.handleMouseLeave = function handleMouseLeave(event) {\n    this.removeClass('vjs-hover');\n    off(document, 'keyup', this.handleMenuKeyUp_);\n  }\n  /**\n   * Set the focus to the actual button, not to this element\n   */\n  ;\n\n  _proto.focus = function focus() {\n    this.menuButton_.focus();\n  }\n  /**\n   * Remove the focus from the actual button, not this element\n   */\n  ;\n\n  _proto.blur = function blur() {\n    this.menuButton_.blur();\n  }\n  /**\n   * Handle tab, escape, down arrow, and up arrow keys for `MenuButton`. See\n   * {@link ClickableComponent#handleKeyDown} for instances where this is called.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    // Escape or Tab unpress the 'button'\n    if (keycode.isEventKey(event, 'Esc') || keycode.isEventKey(event, 'Tab')) {\n      if (this.buttonPressed_) {\n        this.unpressButton();\n      } // Don't preventDefault for Tab key - we still want to lose focus\n\n\n      if (!keycode.isEventKey(event, 'Tab')) {\n        event.preventDefault(); // Set focus back to the menu button's button\n\n        this.menuButton_.focus();\n      } // Up Arrow or Down Arrow also 'press' the button to open the menu\n\n    } else if (keycode.isEventKey(event, 'Up') || keycode.isEventKey(event, 'Down')) {\n      if (!this.buttonPressed_) {\n        event.preventDefault();\n        this.pressButton();\n      }\n    }\n  }\n  /**\n   * Handle a `keyup` event on a `MenuButton`. The listener for this is added in\n   * the constructor.\n   *\n   * @param {EventTarget~Event} event\n   *        Key press event\n   *\n   * @listens keyup\n   */\n  ;\n\n  _proto.handleMenuKeyUp = function handleMenuKeyUp(event) {\n    // Escape hides popup menu\n    if (keycode.isEventKey(event, 'Esc') || keycode.isEventKey(event, 'Tab')) {\n      this.removeClass('vjs-hover');\n    }\n  }\n  /**\n   * This method name now delegates to `handleSubmenuKeyDown`. This means\n   * anyone calling `handleSubmenuKeyPress` will not see their method calls\n   * stop working.\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to be called.\n   */\n  ;\n\n  _proto.handleSubmenuKeyPress = function handleSubmenuKeyPress(event) {\n    this.handleSubmenuKeyDown(event);\n  }\n  /**\n   * Handle a `keydown` event on a sub-menu. The listener for this is added in\n   * the constructor.\n   *\n   * @param {EventTarget~Event} event\n   *        Key press event\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleSubmenuKeyDown = function handleSubmenuKeyDown(event) {\n    // Escape or Tab unpress the 'button'\n    if (keycode.isEventKey(event, 'Esc') || keycode.isEventKey(event, 'Tab')) {\n      if (this.buttonPressed_) {\n        this.unpressButton();\n      } // Don't preventDefault for Tab key - we still want to lose focus\n\n\n      if (!keycode.isEventKey(event, 'Tab')) {\n        event.preventDefault(); // Set focus back to the menu button's button\n\n        this.menuButton_.focus();\n      }\n    }\n  }\n  /**\n   * Put the current `MenuButton` into a pressed state.\n   */\n  ;\n\n  _proto.pressButton = function pressButton() {\n    if (this.enabled_) {\n      this.buttonPressed_ = true;\n      this.menu.show();\n      this.menu.lockShowing();\n      this.menuButton_.el_.setAttribute('aria-expanded', 'true'); // set the focus into the submenu, except on iOS where it is resulting in\n      // undesired scrolling behavior when the player is in an iframe\n\n      if (IS_IOS && isInFrame()) {\n        // Return early so that the menu isn't focused\n        return;\n      }\n\n      this.menu.focus();\n    }\n  }\n  /**\n   * Take the current `MenuButton` out of a pressed state.\n   */\n  ;\n\n  _proto.unpressButton = function unpressButton() {\n    if (this.enabled_) {\n      this.buttonPressed_ = false;\n      this.menu.unlockShowing();\n      this.menu.hide();\n      this.menuButton_.el_.setAttribute('aria-expanded', 'false');\n    }\n  }\n  /**\n   * Disable the `MenuButton`. Don't allow it to be clicked.\n   */\n  ;\n\n  _proto.disable = function disable() {\n    this.unpressButton();\n    this.enabled_ = false;\n    this.addClass('vjs-disabled');\n    this.menuButton_.disable();\n  }\n  /**\n   * Enable the `MenuButton`. Allow it to be clicked.\n   */\n  ;\n\n  _proto.enable = function enable() {\n    this.enabled_ = true;\n    this.removeClass('vjs-disabled');\n    this.menuButton_.enable();\n  };\n\n  return MenuButton;\n}(Component$1);\n\nComponent$1.registerComponent('MenuButton', MenuButton);\n\n/**\n * The base class for buttons that toggle specific  track types (e.g. subtitles).\n *\n * @extends MenuButton\n */\n\nvar TrackButton = /*#__PURE__*/function (_MenuButton) {\n  _inheritsLoose(TrackButton, _MenuButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function TrackButton(player, options) {\n    var _this;\n\n    var tracks = options.tracks;\n    _this = _MenuButton.call(this, player, options) || this;\n\n    if (_this.items.length <= 1) {\n      _this.hide();\n    }\n\n    if (!tracks) {\n      return _assertThisInitialized(_this);\n    }\n\n    var updateHandler = bind(_assertThisInitialized(_this), _this.update);\n    tracks.addEventListener('removetrack', updateHandler);\n    tracks.addEventListener('addtrack', updateHandler);\n    tracks.addEventListener('labelchange', updateHandler);\n\n    _this.player_.on('ready', updateHandler);\n\n    _this.player_.on('dispose', function () {\n      tracks.removeEventListener('removetrack', updateHandler);\n      tracks.removeEventListener('addtrack', updateHandler);\n      tracks.removeEventListener('labelchange', updateHandler);\n    });\n\n    return _this;\n  }\n\n  return TrackButton;\n}(MenuButton);\n\nComponent$1.registerComponent('TrackButton', TrackButton);\n\n/**\n * @file menu-keys.js\n */\n\n/**\n  * All keys used for operation of a menu (`MenuButton`, `Menu`, and `MenuItem`)\n  * Note that 'Enter' and 'Space' are not included here (otherwise they would\n  * prevent the `MenuButton` and `MenuItem` from being keyboard-clickable)\n  * @typedef MenuKeys\n  * @array\n  */\nvar MenuKeys = ['Tab', 'Esc', 'Up', 'Down', 'Right', 'Left'];\n\n/**\n * The component for a menu item. `<li>`\n *\n * @extends ClickableComponent\n */\n\nvar MenuItem = /*#__PURE__*/function (_ClickableComponent) {\n  _inheritsLoose(MenuItem, _ClickableComponent);\n\n  /**\n   * Creates an instance of the this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   *\n   */\n  function MenuItem(player, options) {\n    var _this;\n\n    _this = _ClickableComponent.call(this, player, options) || this;\n    _this.selectable = options.selectable;\n    _this.isSelected_ = options.selected || false;\n    _this.multiSelectable = options.multiSelectable;\n\n    _this.selected(_this.isSelected_);\n\n    if (_this.selectable) {\n      if (_this.multiSelectable) {\n        _this.el_.setAttribute('role', 'menuitemcheckbox');\n      } else {\n        _this.el_.setAttribute('role', 'menuitemradio');\n      }\n    } else {\n      _this.el_.setAttribute('role', 'menuitem');\n    }\n\n    return _this;\n  }\n  /**\n   * Create the `MenuItem's DOM element\n   *\n   * @param {string} [type=li]\n   *        Element's node type, not actually used, always set to `li`.\n   *\n   * @param {Object} [props={}]\n   *        An object of properties that should be set on the element\n   *\n   * @param {Object} [attrs={}]\n   *        An object of attributes that should be set on the element\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n\n\n  var _proto = MenuItem.prototype;\n\n  _proto.createEl = function createEl$1(type, props, attrs) {\n    // The control is textual, not just an icon\n    this.nonIconControl = true;\n\n    var el = _ClickableComponent.prototype.createEl.call(this, 'li', assign({\n      className: 'vjs-menu-item',\n      tabIndex: -1\n    }, props), attrs); // swap icon with menu item text.\n\n\n    el.replaceChild(createEl('span', {\n      className: 'vjs-menu-item-text',\n      textContent: this.localize(this.options_.label)\n    }), el.querySelector('.vjs-icon-placeholder'));\n    return el;\n  }\n  /**\n   * Ignore keys which are used by the menu, but pass any other ones up. See\n   * {@link ClickableComponent#handleKeyDown} for instances where this is called.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    if (!MenuKeys.some(function (key) {\n      return keycode.isEventKey(event, key);\n    })) {\n      // Pass keydown handling up for unused keys\n      _ClickableComponent.prototype.handleKeyDown.call(this, event);\n    }\n  }\n  /**\n   * Any click on a `MenuItem` puts it into the selected state.\n   * See {@link ClickableComponent#handleClick} for instances where this is called.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    this.selected(true);\n  }\n  /**\n   * Set the state for this menu item as selected or not.\n   *\n   * @param {boolean} selected\n   *        if the menu item is selected or not\n   */\n  ;\n\n  _proto.selected = function selected(_selected) {\n    if (this.selectable) {\n      if (_selected) {\n        this.addClass('vjs-selected');\n        this.el_.setAttribute('aria-checked', 'true'); // aria-checked isn't fully supported by browsers/screen readers,\n        // so indicate selected state to screen reader in the control text.\n\n        this.controlText(', selected');\n        this.isSelected_ = true;\n      } else {\n        this.removeClass('vjs-selected');\n        this.el_.setAttribute('aria-checked', 'false'); // Indicate un-selected state to screen reader\n\n        this.controlText('');\n        this.isSelected_ = false;\n      }\n    }\n  };\n\n  return MenuItem;\n}(ClickableComponent);\n\nComponent$1.registerComponent('MenuItem', MenuItem);\n\n/**\n * The specific menu item type for selecting a language within a text track kind\n *\n * @extends MenuItem\n */\n\nvar TextTrackMenuItem = /*#__PURE__*/function (_MenuItem) {\n  _inheritsLoose(TextTrackMenuItem, _MenuItem);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function TextTrackMenuItem(player, options) {\n    var _this;\n\n    var track = options.track;\n    var tracks = player.textTracks(); // Modify options for parent MenuItem class's init.\n\n    options.label = track.label || track.language || 'Unknown';\n    options.selected = track.mode === 'showing';\n    _this = _MenuItem.call(this, player, options) || this;\n    _this.track = track; // Determine the relevant kind(s) of tracks for this component and filter\n    // out empty kinds.\n\n    _this.kinds = (options.kinds || [options.kind || _this.track.kind]).filter(Boolean);\n\n    var changeHandler = function changeHandler() {\n      for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n        args[_key] = arguments[_key];\n      }\n\n      _this.handleTracksChange.apply(_assertThisInitialized(_this), args);\n    };\n\n    var selectedLanguageChangeHandler = function selectedLanguageChangeHandler() {\n      for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {\n        args[_key2] = arguments[_key2];\n      }\n\n      _this.handleSelectedLanguageChange.apply(_assertThisInitialized(_this), args);\n    };\n\n    player.on(['loadstart', 'texttrackchange'], changeHandler);\n    tracks.addEventListener('change', changeHandler);\n    tracks.addEventListener('selectedlanguagechange', selectedLanguageChangeHandler);\n\n    _this.on('dispose', function () {\n      player.off(['loadstart', 'texttrackchange'], changeHandler);\n      tracks.removeEventListener('change', changeHandler);\n      tracks.removeEventListener('selectedlanguagechange', selectedLanguageChangeHandler);\n    }); // iOS7 doesn't dispatch change events to TextTrackLists when an\n    // associated track's mode changes. Without something like\n    // Object.observe() (also not present on iOS7), it's not\n    // possible to detect changes to the mode attribute and polyfill\n    // the change event. As a poor substitute, we manually dispatch\n    // change events whenever the controls modify the mode.\n\n\n    if (tracks.onchange === undefined) {\n      var event;\n\n      _this.on(['tap', 'click'], function () {\n        if (typeof window$1.Event !== 'object') {\n          // Android 2.3 throws an Illegal Constructor error for window.Event\n          try {\n            event = new window$1.Event('change');\n          } catch (err) {// continue regardless of error\n          }\n        }\n\n        if (!event) {\n          event = document.createEvent('Event');\n          event.initEvent('change', true, true);\n        }\n\n        tracks.dispatchEvent(event);\n      });\n    } // set the default state based on current tracks\n\n\n    _this.handleTracksChange();\n\n    return _this;\n  }\n  /**\n   * This gets called when an `TextTrackMenuItem` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  var _proto = TextTrackMenuItem.prototype;\n\n  _proto.handleClick = function handleClick(event) {\n    var referenceTrack = this.track;\n    var tracks = this.player_.textTracks();\n\n    _MenuItem.prototype.handleClick.call(this, event);\n\n    if (!tracks) {\n      return;\n    }\n\n    for (var i = 0; i < tracks.length; i++) {\n      var track = tracks[i]; // If the track from the text tracks list is not of the right kind,\n      // skip it. We do not want to affect tracks of incompatible kind(s).\n\n      if (this.kinds.indexOf(track.kind) === -1) {\n        continue;\n      } // If this text track is the component's track and it is not showing,\n      // set it to showing.\n\n\n      if (track === referenceTrack) {\n        if (track.mode !== 'showing') {\n          track.mode = 'showing';\n        } // If this text track is not the component's track and it is not\n        // disabled, set it to disabled.\n\n      } else if (track.mode !== 'disabled') {\n        track.mode = 'disabled';\n      }\n    }\n  }\n  /**\n   * Handle text track list change\n   *\n   * @param {EventTarget~Event} event\n   *        The `change` event that caused this function to be called.\n   *\n   * @listens TextTrackList#change\n   */\n  ;\n\n  _proto.handleTracksChange = function handleTracksChange(event) {\n    var shouldBeSelected = this.track.mode === 'showing'; // Prevent redundant selected() calls because they may cause\n    // screen readers to read the appended control text unnecessarily\n\n    if (shouldBeSelected !== this.isSelected_) {\n      this.selected(shouldBeSelected);\n    }\n  };\n\n  _proto.handleSelectedLanguageChange = function handleSelectedLanguageChange(event) {\n    if (this.track.mode === 'showing') {\n      var selectedLanguage = this.player_.cache_.selectedLanguage; // Don't replace the kind of track across the same language\n\n      if (selectedLanguage && selectedLanguage.enabled && selectedLanguage.language === this.track.language && selectedLanguage.kind !== this.track.kind) {\n        return;\n      }\n\n      this.player_.cache_.selectedLanguage = {\n        enabled: true,\n        language: this.track.language,\n        kind: this.track.kind\n      };\n    }\n  };\n\n  _proto.dispose = function dispose() {\n    // remove reference to track object on dispose\n    this.track = null;\n\n    _MenuItem.prototype.dispose.call(this);\n  };\n\n  return TextTrackMenuItem;\n}(MenuItem);\n\nComponent$1.registerComponent('TextTrackMenuItem', TextTrackMenuItem);\n\n/**\n * A special menu item for turning of a specific type of text track\n *\n * @extends TextTrackMenuItem\n */\n\nvar OffTextTrackMenuItem = /*#__PURE__*/function (_TextTrackMenuItem) {\n  _inheritsLoose(OffTextTrackMenuItem, _TextTrackMenuItem);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function OffTextTrackMenuItem(player, options) {\n    // Create pseudo track info\n    // Requires options['kind']\n    options.track = {\n      player: player,\n      // it is no longer necessary to store `kind` or `kinds` on the track itself\n      // since they are now stored in the `kinds` property of all instances of\n      // TextTrackMenuItem, but this will remain for backwards compatibility\n      kind: options.kind,\n      kinds: options.kinds,\n      \"default\": false,\n      mode: 'disabled'\n    };\n\n    if (!options.kinds) {\n      options.kinds = [options.kind];\n    }\n\n    if (options.label) {\n      options.track.label = options.label;\n    } else {\n      options.track.label = options.kinds.join(' and ') + ' off';\n    } // MenuItem is selectable\n\n\n    options.selectable = true; // MenuItem is NOT multiSelectable (i.e. only one can be marked \"selected\" at a time)\n\n    options.multiSelectable = false;\n    return _TextTrackMenuItem.call(this, player, options) || this;\n  }\n  /**\n   * Handle text track change\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to run\n   */\n\n\n  var _proto = OffTextTrackMenuItem.prototype;\n\n  _proto.handleTracksChange = function handleTracksChange(event) {\n    var tracks = this.player().textTracks();\n    var shouldBeSelected = true;\n\n    for (var i = 0, l = tracks.length; i < l; i++) {\n      var track = tracks[i];\n\n      if (this.options_.kinds.indexOf(track.kind) > -1 && track.mode === 'showing') {\n        shouldBeSelected = false;\n        break;\n      }\n    } // Prevent redundant selected() calls because they may cause\n    // screen readers to read the appended control text unnecessarily\n\n\n    if (shouldBeSelected !== this.isSelected_) {\n      this.selected(shouldBeSelected);\n    }\n  };\n\n  _proto.handleSelectedLanguageChange = function handleSelectedLanguageChange(event) {\n    var tracks = this.player().textTracks();\n    var allHidden = true;\n\n    for (var i = 0, l = tracks.length; i < l; i++) {\n      var track = tracks[i];\n\n      if (['captions', 'descriptions', 'subtitles'].indexOf(track.kind) > -1 && track.mode === 'showing') {\n        allHidden = false;\n        break;\n      }\n    }\n\n    if (allHidden) {\n      this.player_.cache_.selectedLanguage = {\n        enabled: false\n      };\n    }\n  };\n\n  return OffTextTrackMenuItem;\n}(TextTrackMenuItem);\n\nComponent$1.registerComponent('OffTextTrackMenuItem', OffTextTrackMenuItem);\n\n/**\n * The base class for buttons that toggle specific text track types (e.g. subtitles)\n *\n * @extends MenuButton\n */\n\nvar TextTrackButton = /*#__PURE__*/function (_TrackButton) {\n  _inheritsLoose(TextTrackButton, _TrackButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   */\n  function TextTrackButton(player, options) {\n    if (options === void 0) {\n      options = {};\n    }\n\n    options.tracks = player.textTracks();\n    return _TrackButton.call(this, player, options) || this;\n  }\n  /**\n   * Create a menu item for each text track\n   *\n   * @param {TextTrackMenuItem[]} [items=[]]\n   *        Existing array of items to use during creation\n   *\n   * @return {TextTrackMenuItem[]}\n   *         Array of menu items that were created\n   */\n\n\n  var _proto = TextTrackButton.prototype;\n\n  _proto.createItems = function createItems(items, TrackMenuItem) {\n    if (items === void 0) {\n      items = [];\n    }\n\n    if (TrackMenuItem === void 0) {\n      TrackMenuItem = TextTrackMenuItem;\n    }\n\n    // Label is an override for the [track] off label\n    // USed to localise captions/subtitles\n    var label;\n\n    if (this.label_) {\n      label = this.label_ + \" off\";\n    } // Add an OFF menu item to turn all tracks off\n\n\n    items.push(new OffTextTrackMenuItem(this.player_, {\n      kinds: this.kinds_,\n      kind: this.kind_,\n      label: label\n    }));\n    this.hideThreshold_ += 1;\n    var tracks = this.player_.textTracks();\n\n    if (!Array.isArray(this.kinds_)) {\n      this.kinds_ = [this.kind_];\n    }\n\n    for (var i = 0; i < tracks.length; i++) {\n      var track = tracks[i]; // only add tracks that are of an appropriate kind and have a label\n\n      if (this.kinds_.indexOf(track.kind) > -1) {\n        var item = new TrackMenuItem(this.player_, {\n          track: track,\n          kinds: this.kinds_,\n          kind: this.kind_,\n          // MenuItem is selectable\n          selectable: true,\n          // MenuItem is NOT multiSelectable (i.e. only one can be marked \"selected\" at a time)\n          multiSelectable: false\n        });\n        item.addClass(\"vjs-\" + track.kind + \"-menu-item\");\n        items.push(item);\n      }\n    }\n\n    return items;\n  };\n\n  return TextTrackButton;\n}(TrackButton);\n\nComponent$1.registerComponent('TextTrackButton', TextTrackButton);\n\n/**\n * The chapter track menu item\n *\n * @extends MenuItem\n */\n\nvar ChaptersTrackMenuItem = /*#__PURE__*/function (_MenuItem) {\n  _inheritsLoose(ChaptersTrackMenuItem, _MenuItem);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function ChaptersTrackMenuItem(player, options) {\n    var _this;\n\n    var track = options.track;\n    var cue = options.cue;\n    var currentTime = player.currentTime(); // Modify options for parent MenuItem class's init.\n\n    options.selectable = true;\n    options.multiSelectable = false;\n    options.label = cue.text;\n    options.selected = cue.startTime <= currentTime && currentTime < cue.endTime;\n    _this = _MenuItem.call(this, player, options) || this;\n    _this.track = track;\n    _this.cue = cue;\n    track.addEventListener('cuechange', bind(_assertThisInitialized(_this), _this.update));\n    return _this;\n  }\n  /**\n   * This gets called when an `ChaptersTrackMenuItem` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  var _proto = ChaptersTrackMenuItem.prototype;\n\n  _proto.handleClick = function handleClick(event) {\n    _MenuItem.prototype.handleClick.call(this);\n\n    this.player_.currentTime(this.cue.startTime);\n    this.update(this.cue.startTime);\n  }\n  /**\n   * Update chapter menu item\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `cuechange` event that caused this function to run.\n   *\n   * @listens TextTrack#cuechange\n   */\n  ;\n\n  _proto.update = function update(event) {\n    var cue = this.cue;\n    var currentTime = this.player_.currentTime(); // vjs.log(currentTime, cue.startTime);\n\n    this.selected(cue.startTime <= currentTime && currentTime < cue.endTime);\n  };\n\n  return ChaptersTrackMenuItem;\n}(MenuItem);\n\nComponent$1.registerComponent('ChaptersTrackMenuItem', ChaptersTrackMenuItem);\n\n/**\n * The button component for toggling and selecting chapters\n * Chapters act much differently than other text tracks\n * Cues are navigation vs. other tracks of alternative languages\n *\n * @extends TextTrackButton\n */\n\nvar ChaptersButton = /*#__PURE__*/function (_TextTrackButton) {\n  _inheritsLoose(ChaptersButton, _TextTrackButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function to call when this function is ready.\n   */\n  function ChaptersButton(player, options, ready) {\n    return _TextTrackButton.call(this, player, options, ready) || this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = ChaptersButton.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-chapters-button \" + _TextTrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  _proto.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return \"vjs-chapters-button \" + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);\n  }\n  /**\n   * Update the menu based on the current state of its items.\n   *\n   * @param {EventTarget~Event} [event]\n   *        An event that triggered this function to run.\n   *\n   * @listens TextTrackList#addtrack\n   * @listens TextTrackList#removetrack\n   * @listens TextTrackList#change\n   */\n  ;\n\n  _proto.update = function update(event) {\n    if (!this.track_ || event && (event.type === 'addtrack' || event.type === 'removetrack')) {\n      this.setTrack(this.findChaptersTrack());\n    }\n\n    _TextTrackButton.prototype.update.call(this);\n  }\n  /**\n   * Set the currently selected track for the chapters button.\n   *\n   * @param {TextTrack} track\n   *        The new track to select. Nothing will change if this is the currently selected\n   *        track.\n   */\n  ;\n\n  _proto.setTrack = function setTrack(track) {\n    if (this.track_ === track) {\n      return;\n    }\n\n    if (!this.updateHandler_) {\n      this.updateHandler_ = this.update.bind(this);\n    } // here this.track_ refers to the old track instance\n\n\n    if (this.track_) {\n      var remoteTextTrackEl = this.player_.remoteTextTrackEls().getTrackElementByTrack_(this.track_);\n\n      if (remoteTextTrackEl) {\n        remoteTextTrackEl.removeEventListener('load', this.updateHandler_);\n      }\n\n      this.track_ = null;\n    }\n\n    this.track_ = track; // here this.track_ refers to the new track instance\n\n    if (this.track_) {\n      this.track_.mode = 'hidden';\n\n      var _remoteTextTrackEl = this.player_.remoteTextTrackEls().getTrackElementByTrack_(this.track_);\n\n      if (_remoteTextTrackEl) {\n        _remoteTextTrackEl.addEventListener('load', this.updateHandler_);\n      }\n    }\n  }\n  /**\n   * Find the track object that is currently in use by this ChaptersButton\n   *\n   * @return {TextTrack|undefined}\n   *         The current track or undefined if none was found.\n   */\n  ;\n\n  _proto.findChaptersTrack = function findChaptersTrack() {\n    var tracks = this.player_.textTracks() || [];\n\n    for (var i = tracks.length - 1; i >= 0; i--) {\n      // We will always choose the last track as our chaptersTrack\n      var track = tracks[i];\n\n      if (track.kind === this.kind_) {\n        return track;\n      }\n    }\n  }\n  /**\n   * Get the caption for the ChaptersButton based on the track label. This will also\n   * use the current tracks localized kind as a fallback if a label does not exist.\n   *\n   * @return {string}\n   *         The tracks current label or the localized track kind.\n   */\n  ;\n\n  _proto.getMenuCaption = function getMenuCaption() {\n    if (this.track_ && this.track_.label) {\n      return this.track_.label;\n    }\n\n    return this.localize(toTitleCase$1(this.kind_));\n  }\n  /**\n   * Create menu from chapter track\n   *\n   * @return {Menu}\n   *         New menu for the chapter buttons\n   */\n  ;\n\n  _proto.createMenu = function createMenu() {\n    this.options_.title = this.getMenuCaption();\n    return _TextTrackButton.prototype.createMenu.call(this);\n  }\n  /**\n   * Create a menu item for each text track\n   *\n   * @return {TextTrackMenuItem[]}\n   *         Array of menu items\n   */\n  ;\n\n  _proto.createItems = function createItems() {\n    var items = [];\n\n    if (!this.track_) {\n      return items;\n    }\n\n    var cues = this.track_.cues;\n\n    if (!cues) {\n      return items;\n    }\n\n    for (var i = 0, l = cues.length; i < l; i++) {\n      var cue = cues[i];\n      var mi = new ChaptersTrackMenuItem(this.player_, {\n        track: this.track_,\n        cue: cue\n      });\n      items.push(mi);\n    }\n\n    return items;\n  };\n\n  return ChaptersButton;\n}(TextTrackButton);\n/**\n * `kind` of TextTrack to look for to associate it with this menu.\n *\n * @type {string}\n * @private\n */\n\n\nChaptersButton.prototype.kind_ = 'chapters';\n/**\n * The text that should display over the `ChaptersButton`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\nChaptersButton.prototype.controlText_ = 'Chapters';\nComponent$1.registerComponent('ChaptersButton', ChaptersButton);\n\n/**\n * The button component for toggling and selecting descriptions\n *\n * @extends TextTrackButton\n */\n\nvar DescriptionsButton = /*#__PURE__*/function (_TextTrackButton) {\n  _inheritsLoose(DescriptionsButton, _TextTrackButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function to call when this component is ready.\n   */\n  function DescriptionsButton(player, options, ready) {\n    var _this;\n\n    _this = _TextTrackButton.call(this, player, options, ready) || this;\n    var tracks = player.textTracks();\n    var changeHandler = bind(_assertThisInitialized(_this), _this.handleTracksChange);\n    tracks.addEventListener('change', changeHandler);\n\n    _this.on('dispose', function () {\n      tracks.removeEventListener('change', changeHandler);\n    });\n\n    return _this;\n  }\n  /**\n   * Handle text track change\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to run\n   *\n   * @listens TextTrackList#change\n   */\n\n\n  var _proto = DescriptionsButton.prototype;\n\n  _proto.handleTracksChange = function handleTracksChange(event) {\n    var tracks = this.player().textTracks();\n    var disabled = false; // Check whether a track of a different kind is showing\n\n    for (var i = 0, l = tracks.length; i < l; i++) {\n      var track = tracks[i];\n\n      if (track.kind !== this.kind_ && track.mode === 'showing') {\n        disabled = true;\n        break;\n      }\n    } // If another track is showing, disable this menu button\n\n\n    if (disabled) {\n      this.disable();\n    } else {\n      this.enable();\n    }\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n  ;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-descriptions-button \" + _TextTrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  _proto.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return \"vjs-descriptions-button \" + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);\n  };\n\n  return DescriptionsButton;\n}(TextTrackButton);\n/**\n * `kind` of TextTrack to look for to associate it with this menu.\n *\n * @type {string}\n * @private\n */\n\n\nDescriptionsButton.prototype.kind_ = 'descriptions';\n/**\n * The text that should display over the `DescriptionsButton`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\nDescriptionsButton.prototype.controlText_ = 'Descriptions';\nComponent$1.registerComponent('DescriptionsButton', DescriptionsButton);\n\n/**\n * The button component for toggling and selecting subtitles\n *\n * @extends TextTrackButton\n */\n\nvar SubtitlesButton = /*#__PURE__*/function (_TextTrackButton) {\n  _inheritsLoose(SubtitlesButton, _TextTrackButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function to call when this component is ready.\n   */\n  function SubtitlesButton(player, options, ready) {\n    return _TextTrackButton.call(this, player, options, ready) || this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = SubtitlesButton.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-subtitles-button \" + _TextTrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  _proto.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return \"vjs-subtitles-button \" + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);\n  };\n\n  return SubtitlesButton;\n}(TextTrackButton);\n/**\n * `kind` of TextTrack to look for to associate it with this menu.\n *\n * @type {string}\n * @private\n */\n\n\nSubtitlesButton.prototype.kind_ = 'subtitles';\n/**\n * The text that should display over the `SubtitlesButton`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\nSubtitlesButton.prototype.controlText_ = 'Subtitles';\nComponent$1.registerComponent('SubtitlesButton', SubtitlesButton);\n\n/**\n * The menu item for caption track settings menu\n *\n * @extends TextTrackMenuItem\n */\n\nvar CaptionSettingsMenuItem = /*#__PURE__*/function (_TextTrackMenuItem) {\n  _inheritsLoose(CaptionSettingsMenuItem, _TextTrackMenuItem);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function CaptionSettingsMenuItem(player, options) {\n    var _this;\n\n    options.track = {\n      player: player,\n      kind: options.kind,\n      label: options.kind + ' settings',\n      selectable: false,\n      \"default\": false,\n      mode: 'disabled'\n    }; // CaptionSettingsMenuItem has no concept of 'selected'\n\n    options.selectable = false;\n    options.name = 'CaptionSettingsMenuItem';\n    _this = _TextTrackMenuItem.call(this, player, options) || this;\n\n    _this.addClass('vjs-texttrack-settings');\n\n    _this.controlText(', opens ' + options.kind + ' settings dialog');\n\n    return _this;\n  }\n  /**\n   * This gets called when an `CaptionSettingsMenuItem` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  var _proto = CaptionSettingsMenuItem.prototype;\n\n  _proto.handleClick = function handleClick(event) {\n    this.player().getChild('textTrackSettings').open();\n  };\n\n  return CaptionSettingsMenuItem;\n}(TextTrackMenuItem);\n\nComponent$1.registerComponent('CaptionSettingsMenuItem', CaptionSettingsMenuItem);\n\n/**\n * The button component for toggling and selecting captions\n *\n * @extends TextTrackButton\n */\n\nvar CaptionsButton = /*#__PURE__*/function (_TextTrackButton) {\n  _inheritsLoose(CaptionsButton, _TextTrackButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function to call when this component is ready.\n   */\n  function CaptionsButton(player, options, ready) {\n    return _TextTrackButton.call(this, player, options, ready) || this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = CaptionsButton.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-captions-button \" + _TextTrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  _proto.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return \"vjs-captions-button \" + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);\n  }\n  /**\n   * Create caption menu items\n   *\n   * @return {CaptionSettingsMenuItem[]}\n   *         The array of current menu items.\n   */\n  ;\n\n  _proto.createItems = function createItems() {\n    var items = [];\n\n    if (!(this.player().tech_ && this.player().tech_.featuresNativeTextTracks) && this.player().getChild('textTrackSettings')) {\n      items.push(new CaptionSettingsMenuItem(this.player_, {\n        kind: this.kind_\n      }));\n      this.hideThreshold_ += 1;\n    }\n\n    return _TextTrackButton.prototype.createItems.call(this, items);\n  };\n\n  return CaptionsButton;\n}(TextTrackButton);\n/**\n * `kind` of TextTrack to look for to associate it with this menu.\n *\n * @type {string}\n * @private\n */\n\n\nCaptionsButton.prototype.kind_ = 'captions';\n/**\n * The text that should display over the `CaptionsButton`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\nCaptionsButton.prototype.controlText_ = 'Captions';\nComponent$1.registerComponent('CaptionsButton', CaptionsButton);\n\n/**\n * SubsCapsMenuItem has an [cc] icon to distinguish captions from subtitles\n * in the SubsCapsMenu.\n *\n * @extends TextTrackMenuItem\n */\n\nvar SubsCapsMenuItem = /*#__PURE__*/function (_TextTrackMenuItem) {\n  _inheritsLoose(SubsCapsMenuItem, _TextTrackMenuItem);\n\n  function SubsCapsMenuItem() {\n    return _TextTrackMenuItem.apply(this, arguments) || this;\n  }\n\n  var _proto = SubsCapsMenuItem.prototype;\n\n  _proto.createEl = function createEl$1(type, props, attrs) {\n    var el = _TextTrackMenuItem.prototype.createEl.call(this, type, props, attrs);\n\n    var parentSpan = el.querySelector('.vjs-menu-item-text');\n\n    if (this.options_.track.kind === 'captions') {\n      parentSpan.appendChild(createEl('span', {\n        className: 'vjs-icon-placeholder'\n      }, {\n        'aria-hidden': true\n      }));\n      parentSpan.appendChild(createEl('span', {\n        className: 'vjs-control-text',\n        // space added as the text will visually flow with the\n        // label\n        textContent: \" \" + this.localize('Captions')\n      }));\n    }\n\n    return el;\n  };\n\n  return SubsCapsMenuItem;\n}(TextTrackMenuItem);\n\nComponent$1.registerComponent('SubsCapsMenuItem', SubsCapsMenuItem);\n\n/**\n * The button component for toggling and selecting captions and/or subtitles\n *\n * @extends TextTrackButton\n */\n\nvar SubsCapsButton = /*#__PURE__*/function (_TextTrackButton) {\n  _inheritsLoose(SubsCapsButton, _TextTrackButton);\n\n  function SubsCapsButton(player, options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    _this = _TextTrackButton.call(this, player, options) || this; // Although North America uses \"captions\" in most cases for\n    // \"captions and subtitles\" other locales use \"subtitles\"\n\n    _this.label_ = 'subtitles';\n\n    if (['en', 'en-us', 'en-ca', 'fr-ca'].indexOf(_this.player_.language_) > -1) {\n      _this.label_ = 'captions';\n    }\n\n    _this.menuButton_.controlText(toTitleCase$1(_this.label_));\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = SubsCapsButton.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-subs-caps-button \" + _TextTrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  _proto.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return \"vjs-subs-caps-button \" + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);\n  }\n  /**\n   * Create caption/subtitles menu items\n   *\n   * @return {CaptionSettingsMenuItem[]}\n   *         The array of current menu items.\n   */\n  ;\n\n  _proto.createItems = function createItems() {\n    var items = [];\n\n    if (!(this.player().tech_ && this.player().tech_.featuresNativeTextTracks) && this.player().getChild('textTrackSettings')) {\n      items.push(new CaptionSettingsMenuItem(this.player_, {\n        kind: this.label_\n      }));\n      this.hideThreshold_ += 1;\n    }\n\n    items = _TextTrackButton.prototype.createItems.call(this, items, SubsCapsMenuItem);\n    return items;\n  };\n\n  return SubsCapsButton;\n}(TextTrackButton);\n/**\n * `kind`s of TextTrack to look for to associate it with this menu.\n *\n * @type {array}\n * @private\n */\n\n\nSubsCapsButton.prototype.kinds_ = ['captions', 'subtitles'];\n/**\n * The text that should display over the `SubsCapsButton`s controls.\n *\n *\n * @type {string}\n * @private\n */\n\nSubsCapsButton.prototype.controlText_ = 'Subtitles';\nComponent$1.registerComponent('SubsCapsButton', SubsCapsButton);\n\n/**\n * An {@link AudioTrack} {@link MenuItem}\n *\n * @extends MenuItem\n */\n\nvar AudioTrackMenuItem = /*#__PURE__*/function (_MenuItem) {\n  _inheritsLoose(AudioTrackMenuItem, _MenuItem);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function AudioTrackMenuItem(player, options) {\n    var _this;\n\n    var track = options.track;\n    var tracks = player.audioTracks(); // Modify options for parent MenuItem class's init.\n\n    options.label = track.label || track.language || 'Unknown';\n    options.selected = track.enabled;\n    _this = _MenuItem.call(this, player, options) || this;\n    _this.track = track;\n\n    _this.addClass(\"vjs-\" + track.kind + \"-menu-item\");\n\n    var changeHandler = function changeHandler() {\n      for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n        args[_key] = arguments[_key];\n      }\n\n      _this.handleTracksChange.apply(_assertThisInitialized(_this), args);\n    };\n\n    tracks.addEventListener('change', changeHandler);\n\n    _this.on('dispose', function () {\n      tracks.removeEventListener('change', changeHandler);\n    });\n\n    return _this;\n  }\n\n  var _proto = AudioTrackMenuItem.prototype;\n\n  _proto.createEl = function createEl$1(type, props, attrs) {\n    var el = _MenuItem.prototype.createEl.call(this, type, props, attrs);\n\n    var parentSpan = el.querySelector('.vjs-menu-item-text');\n\n    if (this.options_.track.kind === 'main-desc') {\n      parentSpan.appendChild(createEl('span', {\n        className: 'vjs-icon-placeholder'\n      }, {\n        'aria-hidden': true\n      }));\n      parentSpan.appendChild(createEl('span', {\n        className: 'vjs-control-text',\n        textContent: ' ' + this.localize('Descriptions')\n      }));\n    }\n\n    return el;\n  }\n  /**\n   * This gets called when an `AudioTrackMenuItem is \"clicked\". See {@link ClickableComponent}\n   * for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    _MenuItem.prototype.handleClick.call(this, event); // the audio track list will automatically toggle other tracks\n    // off for us.\n\n\n    this.track.enabled = true; // when native audio tracks are used, we want to make sure that other tracks are turned off\n\n    if (this.player_.tech_.featuresNativeAudioTracks) {\n      var tracks = this.player_.audioTracks();\n\n      for (var i = 0; i < tracks.length; i++) {\n        var track = tracks[i]; // skip the current track since we enabled it above\n\n        if (track === this.track) {\n          continue;\n        }\n\n        track.enabled = track === this.track;\n      }\n    }\n  }\n  /**\n   * Handle any {@link AudioTrack} change.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The {@link AudioTrackList#change} event that caused this to run.\n   *\n   * @listens AudioTrackList#change\n   */\n  ;\n\n  _proto.handleTracksChange = function handleTracksChange(event) {\n    this.selected(this.track.enabled);\n  };\n\n  return AudioTrackMenuItem;\n}(MenuItem);\n\nComponent$1.registerComponent('AudioTrackMenuItem', AudioTrackMenuItem);\n\n/**\n * The base class for buttons that toggle specific {@link AudioTrack} types.\n *\n * @extends TrackButton\n */\n\nvar AudioTrackButton = /*#__PURE__*/function (_TrackButton) {\n  _inheritsLoose(AudioTrackButton, _TrackButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   */\n  function AudioTrackButton(player, options) {\n    if (options === void 0) {\n      options = {};\n    }\n\n    options.tracks = player.audioTracks();\n    return _TrackButton.call(this, player, options) || this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = AudioTrackButton.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-audio-button \" + _TrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  _proto.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return \"vjs-audio-button \" + _TrackButton.prototype.buildWrapperCSSClass.call(this);\n  }\n  /**\n   * Create a menu item for each audio track\n   *\n   * @param {AudioTrackMenuItem[]} [items=[]]\n   *        An array of existing menu items to use.\n   *\n   * @return {AudioTrackMenuItem[]}\n   *         An array of menu items\n   */\n  ;\n\n  _proto.createItems = function createItems(items) {\n    if (items === void 0) {\n      items = [];\n    }\n\n    // if there's only one audio track, there no point in showing it\n    this.hideThreshold_ = 1;\n    var tracks = this.player_.audioTracks();\n\n    for (var i = 0; i < tracks.length; i++) {\n      var track = tracks[i];\n      items.push(new AudioTrackMenuItem(this.player_, {\n        track: track,\n        // MenuItem is selectable\n        selectable: true,\n        // MenuItem is NOT multiSelectable (i.e. only one can be marked \"selected\" at a time)\n        multiSelectable: false\n      }));\n    }\n\n    return items;\n  };\n\n  return AudioTrackButton;\n}(TrackButton);\n/**\n * The text that should display over the `AudioTrackButton`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nAudioTrackButton.prototype.controlText_ = 'Audio Track';\nComponent$1.registerComponent('AudioTrackButton', AudioTrackButton);\n\n/**\n * The specific menu item type for selecting a playback rate.\n *\n * @extends MenuItem\n */\n\nvar PlaybackRateMenuItem = /*#__PURE__*/function (_MenuItem) {\n  _inheritsLoose(PlaybackRateMenuItem, _MenuItem);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function PlaybackRateMenuItem(player, options) {\n    var _this;\n\n    var label = options.rate;\n    var rate = parseFloat(label, 10); // Modify options for parent MenuItem class's init.\n\n    options.label = label;\n    options.selected = rate === player.playbackRate();\n    options.selectable = true;\n    options.multiSelectable = false;\n    _this = _MenuItem.call(this, player, options) || this;\n    _this.label = label;\n    _this.rate = rate;\n\n    _this.on(player, 'ratechange', function (e) {\n      return _this.update(e);\n    });\n\n    return _this;\n  }\n  /**\n   * This gets called when an `PlaybackRateMenuItem` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  var _proto = PlaybackRateMenuItem.prototype;\n\n  _proto.handleClick = function handleClick(event) {\n    _MenuItem.prototype.handleClick.call(this);\n\n    this.player().playbackRate(this.rate);\n  }\n  /**\n   * Update the PlaybackRateMenuItem when the playbackrate changes.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `ratechange` event that caused this function to run.\n   *\n   * @listens Player#ratechange\n   */\n  ;\n\n  _proto.update = function update(event) {\n    this.selected(this.player().playbackRate() === this.rate);\n  };\n\n  return PlaybackRateMenuItem;\n}(MenuItem);\n/**\n * The text that should display over the `PlaybackRateMenuItem`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nPlaybackRateMenuItem.prototype.contentElType = 'button';\nComponent$1.registerComponent('PlaybackRateMenuItem', PlaybackRateMenuItem);\n\n/**\n * The component for controlling the playback rate.\n *\n * @extends MenuButton\n */\n\nvar PlaybackRateMenuButton = /*#__PURE__*/function (_MenuButton) {\n  _inheritsLoose(PlaybackRateMenuButton, _MenuButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function PlaybackRateMenuButton(player, options) {\n    var _this;\n\n    _this = _MenuButton.call(this, player, options) || this;\n\n    _this.menuButton_.el_.setAttribute('aria-describedby', _this.labelElId_);\n\n    _this.updateVisibility();\n\n    _this.updateLabel();\n\n    _this.on(player, 'loadstart', function (e) {\n      return _this.updateVisibility(e);\n    });\n\n    _this.on(player, 'ratechange', function (e) {\n      return _this.updateLabel(e);\n    });\n\n    _this.on(player, 'playbackrateschange', function (e) {\n      return _this.handlePlaybackRateschange(e);\n    });\n\n    return _this;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = PlaybackRateMenuButton.prototype;\n\n  _proto.createEl = function createEl$1() {\n    var el = _MenuButton.prototype.createEl.call(this);\n\n    this.labelElId_ = 'vjs-playback-rate-value-label-' + this.id_;\n    this.labelEl_ = createEl('div', {\n      className: 'vjs-playback-rate-value',\n      id: this.labelElId_,\n      textContent: '1x'\n    });\n    el.appendChild(this.labelEl_);\n    return el;\n  };\n\n  _proto.dispose = function dispose() {\n    this.labelEl_ = null;\n\n    _MenuButton.prototype.dispose.call(this);\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n  ;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-playback-rate \" + _MenuButton.prototype.buildCSSClass.call(this);\n  };\n\n  _proto.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return \"vjs-playback-rate \" + _MenuButton.prototype.buildWrapperCSSClass.call(this);\n  }\n  /**\n   * Create the list of menu items. Specific to each subclass.\n   *\n   */\n  ;\n\n  _proto.createItems = function createItems() {\n    var rates = this.playbackRates();\n    var items = [];\n\n    for (var i = rates.length - 1; i >= 0; i--) {\n      items.push(new PlaybackRateMenuItem(this.player(), {\n        rate: rates[i] + 'x'\n      }));\n    }\n\n    return items;\n  }\n  /**\n   * Updates ARIA accessibility attributes\n   */\n  ;\n\n  _proto.updateARIAAttributes = function updateARIAAttributes() {\n    // Current playback rate\n    this.el().setAttribute('aria-valuenow', this.player().playbackRate());\n  }\n  /**\n   * This gets called when an `PlaybackRateMenuButton` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    // select next rate option\n    var currentRate = this.player().playbackRate();\n    var rates = this.playbackRates();\n    var currentIndex = rates.indexOf(currentRate); // this get the next rate and it will select first one if the last one currently selected\n\n    var newIndex = (currentIndex + 1) % rates.length;\n    this.player().playbackRate(rates[newIndex]);\n  }\n  /**\n   * On playbackrateschange, update the menu to account for the new items.\n   *\n   * @listens Player#playbackrateschange\n   */\n  ;\n\n  _proto.handlePlaybackRateschange = function handlePlaybackRateschange(event) {\n    this.update();\n  }\n  /**\n   * Get possible playback rates\n   *\n   * @return {Array}\n   *         All possible playback rates\n   */\n  ;\n\n  _proto.playbackRates = function playbackRates() {\n    var player = this.player();\n    return player.playbackRates && player.playbackRates() || [];\n  }\n  /**\n   * Get whether playback rates is supported by the tech\n   * and an array of playback rates exists\n   *\n   * @return {boolean}\n   *         Whether changing playback rate is supported\n   */\n  ;\n\n  _proto.playbackRateSupported = function playbackRateSupported() {\n    return this.player().tech_ && this.player().tech_.featuresPlaybackRate && this.playbackRates() && this.playbackRates().length > 0;\n  }\n  /**\n   * Hide playback rate controls when they're no playback rate options to select\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#loadstart\n   */\n  ;\n\n  _proto.updateVisibility = function updateVisibility(event) {\n    if (this.playbackRateSupported()) {\n      this.removeClass('vjs-hidden');\n    } else {\n      this.addClass('vjs-hidden');\n    }\n  }\n  /**\n   * Update button label when rate changed\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#ratechange\n   */\n  ;\n\n  _proto.updateLabel = function updateLabel(event) {\n    if (this.playbackRateSupported()) {\n      this.labelEl_.textContent = this.player().playbackRate() + 'x';\n    }\n  };\n\n  return PlaybackRateMenuButton;\n}(MenuButton);\n/**\n * The text that should display over the `FullscreenToggle`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nPlaybackRateMenuButton.prototype.controlText_ = 'Playback Rate';\nComponent$1.registerComponent('PlaybackRateMenuButton', PlaybackRateMenuButton);\n\n/**\n * Just an empty spacer element that can be used as an append point for plugins, etc.\n * Also can be used to create space between elements when necessary.\n *\n * @extends Component\n */\n\nvar Spacer = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(Spacer, _Component);\n\n  function Spacer() {\n    return _Component.apply(this, arguments) || this;\n  }\n\n  var _proto = Spacer.prototype;\n\n  /**\n  * Builds the default DOM `className`.\n  *\n  * @return {string}\n  *         The DOM `className` for this object.\n  */\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-spacer \" + _Component.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  ;\n\n  _proto.createEl = function createEl(tag, props, attributes) {\n    if (tag === void 0) {\n      tag = 'div';\n    }\n\n    if (props === void 0) {\n      props = {};\n    }\n\n    if (attributes === void 0) {\n      attributes = {};\n    }\n\n    if (!props.className) {\n      props.className = this.buildCSSClass();\n    }\n\n    return _Component.prototype.createEl.call(this, tag, props, attributes);\n  };\n\n  return Spacer;\n}(Component$1);\n\nComponent$1.registerComponent('Spacer', Spacer);\n\n/**\n * Spacer specifically meant to be used as an insertion point for new plugins, etc.\n *\n * @extends Spacer\n */\n\nvar CustomControlSpacer = /*#__PURE__*/function (_Spacer) {\n  _inheritsLoose(CustomControlSpacer, _Spacer);\n\n  function CustomControlSpacer() {\n    return _Spacer.apply(this, arguments) || this;\n  }\n\n  var _proto = CustomControlSpacer.prototype;\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-custom-control-spacer \" + _Spacer.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  ;\n\n  _proto.createEl = function createEl() {\n    return _Spacer.prototype.createEl.call(this, 'div', {\n      className: this.buildCSSClass(),\n      // No-flex/table-cell mode requires there be some content\n      // in the cell to fill the remaining space of the table.\n      textContent: \"\\xA0\"\n    });\n  };\n\n  return CustomControlSpacer;\n}(Spacer);\n\nComponent$1.registerComponent('CustomControlSpacer', CustomControlSpacer);\n\n/**\n * Container of main controls.\n *\n * @extends Component\n */\n\nvar ControlBar = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(ControlBar, _Component);\n\n  function ControlBar() {\n    return _Component.apply(this, arguments) || this;\n  }\n\n  var _proto = ControlBar.prototype;\n\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-control-bar',\n      dir: 'ltr'\n    });\n  };\n\n  return ControlBar;\n}(Component$1);\n/**\n * Default options for `ControlBar`\n *\n * @type {Object}\n * @private\n */\n\n\nControlBar.prototype.options_ = {\n  children: ['playToggle', 'volumePanel', 'currentTimeDisplay', 'timeDivider', 'durationDisplay', 'progressControl', 'liveDisplay', 'seekToLive', 'remainingTimeDisplay', 'customControlSpacer', 'playbackRateMenuButton', 'chaptersButton', 'descriptionsButton', 'subsCapsButton', 'audioTrackButton', 'fullscreenToggle']\n};\n\nif ('exitPictureInPicture' in document) {\n  ControlBar.prototype.options_.children.splice(ControlBar.prototype.options_.children.length - 1, 0, 'pictureInPictureToggle');\n}\n\nComponent$1.registerComponent('ControlBar', ControlBar);\n\n/**\n * A display that indicates an error has occurred. This means that the video\n * is unplayable.\n *\n * @extends ModalDialog\n */\n\nvar ErrorDisplay = /*#__PURE__*/function (_ModalDialog) {\n  _inheritsLoose(ErrorDisplay, _ModalDialog);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param  {Player} player\n   *         The `Player` that this class should be attached to.\n   *\n   * @param  {Object} [options]\n   *         The key/value store of player options.\n   */\n  function ErrorDisplay(player, options) {\n    var _this;\n\n    _this = _ModalDialog.call(this, player, options) || this;\n\n    _this.on(player, 'error', function (e) {\n      return _this.open(e);\n    });\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   *\n   * @deprecated Since version 5.\n   */\n\n\n  var _proto = ErrorDisplay.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-error-display \" + _ModalDialog.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Gets the localized error message based on the `Player`s error.\n   *\n   * @return {string}\n   *         The `Player`s error message localized or an empty string.\n   */\n  ;\n\n  _proto.content = function content() {\n    var error = this.player().error();\n    return error ? this.localize(error.message) : '';\n  };\n\n  return ErrorDisplay;\n}(ModalDialog);\n/**\n * The default options for an `ErrorDisplay`.\n *\n * @private\n */\n\n\nErrorDisplay.prototype.options_ = _extends({}, ModalDialog.prototype.options_, {\n  pauseOnOpen: false,\n  fillAlways: true,\n  temporary: false,\n  uncloseable: true\n});\nComponent$1.registerComponent('ErrorDisplay', ErrorDisplay);\n\nvar LOCAL_STORAGE_KEY$1 = 'vjs-text-track-settings';\nvar COLOR_BLACK = ['#000', 'Black'];\nvar COLOR_BLUE = ['#00F', 'Blue'];\nvar COLOR_CYAN = ['#0FF', 'Cyan'];\nvar COLOR_GREEN = ['#0F0', 'Green'];\nvar COLOR_MAGENTA = ['#F0F', 'Magenta'];\nvar COLOR_RED = ['#F00', 'Red'];\nvar COLOR_WHITE = ['#FFF', 'White'];\nvar COLOR_YELLOW = ['#FF0', 'Yellow'];\nvar OPACITY_OPAQUE = ['1', 'Opaque'];\nvar OPACITY_SEMI = ['0.5', 'Semi-Transparent'];\nvar OPACITY_TRANS = ['0', 'Transparent']; // Configuration for the various <select> elements in the DOM of this component.\n//\n// Possible keys include:\n//\n// `default`:\n//   The default option index. Only needs to be provided if not zero.\n// `parser`:\n//   A function which is used to parse the value from the selected option in\n//   a customized way.\n// `selector`:\n//   The selector used to find the associated <select> element.\n\nvar selectConfigs = {\n  backgroundColor: {\n    selector: '.vjs-bg-color > select',\n    id: 'captions-background-color-%s',\n    label: 'Color',\n    options: [COLOR_BLACK, COLOR_WHITE, COLOR_RED, COLOR_GREEN, COLOR_BLUE, COLOR_YELLOW, COLOR_MAGENTA, COLOR_CYAN]\n  },\n  backgroundOpacity: {\n    selector: '.vjs-bg-opacity > select',\n    id: 'captions-background-opacity-%s',\n    label: 'Transparency',\n    options: [OPACITY_OPAQUE, OPACITY_SEMI, OPACITY_TRANS]\n  },\n  color: {\n    selector: '.vjs-fg-color > select',\n    id: 'captions-foreground-color-%s',\n    label: 'Color',\n    options: [COLOR_WHITE, COLOR_BLACK, COLOR_RED, COLOR_GREEN, COLOR_BLUE, COLOR_YELLOW, COLOR_MAGENTA, COLOR_CYAN]\n  },\n  edgeStyle: {\n    selector: '.vjs-edge-style > select',\n    id: '%s',\n    label: 'Text Edge Style',\n    options: [['none', 'None'], ['raised', 'Raised'], ['depressed', 'Depressed'], ['uniform', 'Uniform'], ['dropshadow', 'Dropshadow']]\n  },\n  fontFamily: {\n    selector: '.vjs-font-family > select',\n    id: 'captions-font-family-%s',\n    label: 'Font Family',\n    options: [['proportionalSansSerif', 'Proportional Sans-Serif'], ['monospaceSansSerif', 'Monospace Sans-Serif'], ['proportionalSerif', 'Proportional Serif'], ['monospaceSerif', 'Monospace Serif'], ['casual', 'Casual'], ['script', 'Script'], ['small-caps', 'Small Caps']]\n  },\n  fontPercent: {\n    selector: '.vjs-font-percent > select',\n    id: 'captions-font-size-%s',\n    label: 'Font Size',\n    options: [['0.50', '50%'], ['0.75', '75%'], ['1.00', '100%'], ['1.25', '125%'], ['1.50', '150%'], ['1.75', '175%'], ['2.00', '200%'], ['3.00', '300%'], ['4.00', '400%']],\n    \"default\": 2,\n    parser: function parser(v) {\n      return v === '1.00' ? null : Number(v);\n    }\n  },\n  textOpacity: {\n    selector: '.vjs-text-opacity > select',\n    id: 'captions-foreground-opacity-%s',\n    label: 'Transparency',\n    options: [OPACITY_OPAQUE, OPACITY_SEMI]\n  },\n  // Options for this object are defined below.\n  windowColor: {\n    selector: '.vjs-window-color > select',\n    id: 'captions-window-color-%s',\n    label: 'Color'\n  },\n  // Options for this object are defined below.\n  windowOpacity: {\n    selector: '.vjs-window-opacity > select',\n    id: 'captions-window-opacity-%s',\n    label: 'Transparency',\n    options: [OPACITY_TRANS, OPACITY_SEMI, OPACITY_OPAQUE]\n  }\n};\nselectConfigs.windowColor.options = selectConfigs.backgroundColor.options;\n/**\n * Get the actual value of an option.\n *\n * @param  {string} value\n *         The value to get\n *\n * @param  {Function} [parser]\n *         Optional function to adjust the value.\n *\n * @return {Mixed}\n *         - Will be `undefined` if no value exists\n *         - Will be `undefined` if the given value is \"none\".\n *         - Will be the actual value otherwise.\n *\n * @private\n */\n\nfunction parseOptionValue(value, parser) {\n  if (parser) {\n    value = parser(value);\n  }\n\n  if (value && value !== 'none') {\n    return value;\n  }\n}\n/**\n * Gets the value of the selected <option> element within a <select> element.\n *\n * @param  {Element} el\n *         the element to look in\n *\n * @param  {Function} [parser]\n *         Optional function to adjust the value.\n *\n * @return {Mixed}\n *         - Will be `undefined` if no value exists\n *         - Will be `undefined` if the given value is \"none\".\n *         - Will be the actual value otherwise.\n *\n * @private\n */\n\n\nfunction getSelectedOptionValue(el, parser) {\n  var value = el.options[el.options.selectedIndex].value;\n  return parseOptionValue(value, parser);\n}\n/**\n * Sets the selected <option> element within a <select> element based on a\n * given value.\n *\n * @param {Element} el\n *        The element to look in.\n *\n * @param {string} value\n *        the property to look on.\n *\n * @param {Function} [parser]\n *        Optional function to adjust the value before comparing.\n *\n * @private\n */\n\n\nfunction setSelectedOption(el, value, parser) {\n  if (!value) {\n    return;\n  }\n\n  for (var i = 0; i < el.options.length; i++) {\n    if (parseOptionValue(el.options[i].value, parser) === value) {\n      el.selectedIndex = i;\n      break;\n    }\n  }\n}\n/**\n * Manipulate Text Tracks settings.\n *\n * @extends ModalDialog\n */\n\n\nvar TextTrackSettings = /*#__PURE__*/function (_ModalDialog) {\n  _inheritsLoose(TextTrackSettings, _ModalDialog);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *         The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *         The key/value store of player options.\n   */\n  function TextTrackSettings(player, options) {\n    var _this;\n\n    options.temporary = false;\n    _this = _ModalDialog.call(this, player, options) || this;\n    _this.updateDisplay = _this.updateDisplay.bind(_assertThisInitialized(_this)); // fill the modal and pretend we have opened it\n\n    _this.fill();\n\n    _this.hasBeenOpened_ = _this.hasBeenFilled_ = true;\n    _this.endDialog = createEl('p', {\n      className: 'vjs-control-text',\n      textContent: _this.localize('End of dialog window.')\n    });\n\n    _this.el().appendChild(_this.endDialog);\n\n    _this.setDefaults(); // Grab `persistTextTrackSettings` from the player options if not passed in child options\n\n\n    if (options.persistTextTrackSettings === undefined) {\n      _this.options_.persistTextTrackSettings = _this.options_.playerOptions.persistTextTrackSettings;\n    }\n\n    _this.on(_this.$('.vjs-done-button'), 'click', function () {\n      _this.saveSettings();\n\n      _this.close();\n    });\n\n    _this.on(_this.$('.vjs-default-button'), 'click', function () {\n      _this.setDefaults();\n\n      _this.updateDisplay();\n    });\n\n    each(selectConfigs, function (config) {\n      _this.on(_this.$(config.selector), 'change', _this.updateDisplay);\n    });\n\n    if (_this.options_.persistTextTrackSettings) {\n      _this.restoreSettings();\n    }\n\n    return _this;\n  }\n\n  var _proto = TextTrackSettings.prototype;\n\n  _proto.dispose = function dispose() {\n    this.endDialog = null;\n\n    _ModalDialog.prototype.dispose.call(this);\n  }\n  /**\n   * Create a <select> element with configured options.\n   *\n   * @param {string} key\n   *        Configuration key to use during creation.\n   *\n   * @return {string}\n   *         An HTML string.\n   *\n   * @private\n   */\n  ;\n\n  _proto.createElSelect_ = function createElSelect_(key, legendId, type) {\n    var _this2 = this;\n\n    if (legendId === void 0) {\n      legendId = '';\n    }\n\n    if (type === void 0) {\n      type = 'label';\n    }\n\n    var config = selectConfigs[key];\n    var id = config.id.replace('%s', this.id_);\n    var selectLabelledbyIds = [legendId, id].join(' ').trim();\n    return [\"<\" + type + \" id=\\\"\" + id + \"\\\" class=\\\"\" + (type === 'label' ? 'vjs-label' : '') + \"\\\">\", this.localize(config.label), \"</\" + type + \">\", \"<select aria-labelledby=\\\"\" + selectLabelledbyIds + \"\\\">\"].concat(config.options.map(function (o) {\n      var optionId = id + '-' + o[1].replace(/\\W+/g, '');\n      return [\"<option id=\\\"\" + optionId + \"\\\" value=\\\"\" + o[0] + \"\\\" \", \"aria-labelledby=\\\"\" + selectLabelledbyIds + \" \" + optionId + \"\\\">\", _this2.localize(o[1]), '</option>'].join('');\n    })).concat('</select>').join('');\n  }\n  /**\n   * Create foreground color element for the component\n   *\n   * @return {string}\n   *         An HTML string.\n   *\n   * @private\n   */\n  ;\n\n  _proto.createElFgColor_ = function createElFgColor_() {\n    var legendId = \"captions-text-legend-\" + this.id_;\n    return ['<fieldset class=\"vjs-fg-color vjs-track-setting\">', \"<legend id=\\\"\" + legendId + \"\\\">\", this.localize('Text'), '</legend>', this.createElSelect_('color', legendId), '<span class=\"vjs-text-opacity vjs-opacity\">', this.createElSelect_('textOpacity', legendId), '</span>', '</fieldset>'].join('');\n  }\n  /**\n   * Create background color element for the component\n   *\n   * @return {string}\n   *         An HTML string.\n   *\n   * @private\n   */\n  ;\n\n  _proto.createElBgColor_ = function createElBgColor_() {\n    var legendId = \"captions-background-\" + this.id_;\n    return ['<fieldset class=\"vjs-bg-color vjs-track-setting\">', \"<legend id=\\\"\" + legendId + \"\\\">\", this.localize('Background'), '</legend>', this.createElSelect_('backgroundColor', legendId), '<span class=\"vjs-bg-opacity vjs-opacity\">', this.createElSelect_('backgroundOpacity', legendId), '</span>', '</fieldset>'].join('');\n  }\n  /**\n   * Create window color element for the component\n   *\n   * @return {string}\n   *         An HTML string.\n   *\n   * @private\n   */\n  ;\n\n  _proto.createElWinColor_ = function createElWinColor_() {\n    var legendId = \"captions-window-\" + this.id_;\n    return ['<fieldset class=\"vjs-window-color vjs-track-setting\">', \"<legend id=\\\"\" + legendId + \"\\\">\", this.localize('Window'), '</legend>', this.createElSelect_('windowColor', legendId), '<span class=\"vjs-window-opacity vjs-opacity\">', this.createElSelect_('windowOpacity', legendId), '</span>', '</fieldset>'].join('');\n  }\n  /**\n   * Create color elements for the component\n   *\n   * @return {Element}\n   *         The element that was created\n   *\n   * @private\n   */\n  ;\n\n  _proto.createElColors_ = function createElColors_() {\n    return createEl('div', {\n      className: 'vjs-track-settings-colors',\n      innerHTML: [this.createElFgColor_(), this.createElBgColor_(), this.createElWinColor_()].join('')\n    });\n  }\n  /**\n   * Create font elements for the component\n   *\n   * @return {Element}\n   *         The element that was created.\n   *\n   * @private\n   */\n  ;\n\n  _proto.createElFont_ = function createElFont_() {\n    return createEl('div', {\n      className: 'vjs-track-settings-font',\n      innerHTML: ['<fieldset class=\"vjs-font-percent vjs-track-setting\">', this.createElSelect_('fontPercent', '', 'legend'), '</fieldset>', '<fieldset class=\"vjs-edge-style vjs-track-setting\">', this.createElSelect_('edgeStyle', '', 'legend'), '</fieldset>', '<fieldset class=\"vjs-font-family vjs-track-setting\">', this.createElSelect_('fontFamily', '', 'legend'), '</fieldset>'].join('')\n    });\n  }\n  /**\n   * Create controls for the component\n   *\n   * @return {Element}\n   *         The element that was created.\n   *\n   * @private\n   */\n  ;\n\n  _proto.createElControls_ = function createElControls_() {\n    var defaultsDescription = this.localize('restore all settings to the default values');\n    return createEl('div', {\n      className: 'vjs-track-settings-controls',\n      innerHTML: [\"<button type=\\\"button\\\" class=\\\"vjs-default-button\\\" title=\\\"\" + defaultsDescription + \"\\\">\", this.localize('Reset'), \"<span class=\\\"vjs-control-text\\\"> \" + defaultsDescription + \"</span>\", '</button>', \"<button type=\\\"button\\\" class=\\\"vjs-done-button\\\">\" + this.localize('Done') + \"</button>\"].join('')\n    });\n  };\n\n  _proto.content = function content() {\n    return [this.createElColors_(), this.createElFont_(), this.createElControls_()];\n  };\n\n  _proto.label = function label() {\n    return this.localize('Caption Settings Dialog');\n  };\n\n  _proto.description = function description() {\n    return this.localize('Beginning of dialog window. Escape will cancel and close the window.');\n  };\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return _ModalDialog.prototype.buildCSSClass.call(this) + ' vjs-text-track-settings';\n  }\n  /**\n   * Gets an object of text track settings (or null).\n   *\n   * @return {Object}\n   *         An object with config values parsed from the DOM or localStorage.\n   */\n  ;\n\n  _proto.getValues = function getValues() {\n    var _this3 = this;\n\n    return reduce(selectConfigs, function (accum, config, key) {\n      var value = getSelectedOptionValue(_this3.$(config.selector), config.parser);\n\n      if (value !== undefined) {\n        accum[key] = value;\n      }\n\n      return accum;\n    }, {});\n  }\n  /**\n   * Sets text track settings from an object of values.\n   *\n   * @param {Object} values\n   *        An object with config values parsed from the DOM or localStorage.\n   */\n  ;\n\n  _proto.setValues = function setValues(values) {\n    var _this4 = this;\n\n    each(selectConfigs, function (config, key) {\n      setSelectedOption(_this4.$(config.selector), values[key], config.parser);\n    });\n  }\n  /**\n   * Sets all `<select>` elements to their default values.\n   */\n  ;\n\n  _proto.setDefaults = function setDefaults() {\n    var _this5 = this;\n\n    each(selectConfigs, function (config) {\n      var index = config.hasOwnProperty('default') ? config[\"default\"] : 0;\n      _this5.$(config.selector).selectedIndex = index;\n    });\n  }\n  /**\n   * Restore texttrack settings from localStorage\n   */\n  ;\n\n  _proto.restoreSettings = function restoreSettings() {\n    var values;\n\n    try {\n      values = JSON.parse(window$1.localStorage.getItem(LOCAL_STORAGE_KEY$1));\n    } catch (err) {\n      log$1.warn(err);\n    }\n\n    if (values) {\n      this.setValues(values);\n    }\n  }\n  /**\n   * Save text track settings to localStorage\n   */\n  ;\n\n  _proto.saveSettings = function saveSettings() {\n    if (!this.options_.persistTextTrackSettings) {\n      return;\n    }\n\n    var values = this.getValues();\n\n    try {\n      if (Object.keys(values).length) {\n        window$1.localStorage.setItem(LOCAL_STORAGE_KEY$1, JSON.stringify(values));\n      } else {\n        window$1.localStorage.removeItem(LOCAL_STORAGE_KEY$1);\n      }\n    } catch (err) {\n      log$1.warn(err);\n    }\n  }\n  /**\n   * Update display of text track settings\n   */\n  ;\n\n  _proto.updateDisplay = function updateDisplay() {\n    var ttDisplay = this.player_.getChild('textTrackDisplay');\n\n    if (ttDisplay) {\n      ttDisplay.updateDisplay();\n    }\n  }\n  /**\n   * conditionally blur the element and refocus the captions button\n   *\n   * @private\n   */\n  ;\n\n  _proto.conditionalBlur_ = function conditionalBlur_() {\n    this.previouslyActiveEl_ = null;\n    var cb = this.player_.controlBar;\n    var subsCapsBtn = cb && cb.subsCapsButton;\n    var ccBtn = cb && cb.captionsButton;\n\n    if (subsCapsBtn) {\n      subsCapsBtn.focus();\n    } else if (ccBtn) {\n      ccBtn.focus();\n    }\n  };\n\n  return TextTrackSettings;\n}(ModalDialog);\n\nComponent$1.registerComponent('TextTrackSettings', TextTrackSettings);\n\n/**\n * A Resize Manager. It is in charge of triggering `playerresize` on the player in the right conditions.\n *\n * It'll either create an iframe and use a debounced resize handler on it or use the new {@link https://wicg.github.io/ResizeObserver/|ResizeObserver}.\n *\n * If the ResizeObserver is available natively, it will be used. A polyfill can be passed in as an option.\n * If a `playerresize` event is not needed, the ResizeManager component can be removed from the player, see the example below.\n * @example <caption>How to disable the resize manager</caption>\n * const player = videojs('#vid', {\n *   resizeManager: false\n * });\n *\n * @see {@link https://wicg.github.io/ResizeObserver/|ResizeObserver specification}\n *\n * @extends Component\n */\n\nvar ResizeManager = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(ResizeManager, _Component);\n\n  /**\n   * Create the ResizeManager.\n   *\n   * @param {Object} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of ResizeManager options.\n   *\n   * @param {Object} [options.ResizeObserver]\n   *        A polyfill for ResizeObserver can be passed in here.\n   *        If this is set to null it will ignore the native ResizeObserver and fall back to the iframe fallback.\n   */\n  function ResizeManager(player, options) {\n    var _this;\n\n    var RESIZE_OBSERVER_AVAILABLE = options.ResizeObserver || window$1.ResizeObserver; // if `null` was passed, we want to disable the ResizeObserver\n\n    if (options.ResizeObserver === null) {\n      RESIZE_OBSERVER_AVAILABLE = false;\n    } // Only create an element when ResizeObserver isn't available\n\n\n    var options_ = mergeOptions$3({\n      createEl: !RESIZE_OBSERVER_AVAILABLE,\n      reportTouchActivity: false\n    }, options);\n    _this = _Component.call(this, player, options_) || this;\n    _this.ResizeObserver = options.ResizeObserver || window$1.ResizeObserver;\n    _this.loadListener_ = null;\n    _this.resizeObserver_ = null;\n    _this.debouncedHandler_ = debounce(function () {\n      _this.resizeHandler();\n    }, 100, false, _assertThisInitialized(_this));\n\n    if (RESIZE_OBSERVER_AVAILABLE) {\n      _this.resizeObserver_ = new _this.ResizeObserver(_this.debouncedHandler_);\n\n      _this.resizeObserver_.observe(player.el());\n    } else {\n      _this.loadListener_ = function () {\n        if (!_this.el_ || !_this.el_.contentWindow) {\n          return;\n        }\n\n        var debouncedHandler_ = _this.debouncedHandler_;\n\n        var unloadListener_ = _this.unloadListener_ = function () {\n          off(this, 'resize', debouncedHandler_);\n          off(this, 'unload', unloadListener_);\n          unloadListener_ = null;\n        }; // safari and edge can unload the iframe before resizemanager dispose\n        // we have to dispose of event handlers correctly before that happens\n\n\n        on(_this.el_.contentWindow, 'unload', unloadListener_);\n        on(_this.el_.contentWindow, 'resize', debouncedHandler_);\n      };\n\n      _this.one('load', _this.loadListener_);\n    }\n\n    return _this;\n  }\n\n  var _proto = ResizeManager.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'iframe', {\n      className: 'vjs-resize-manager',\n      tabIndex: -1\n    }, {\n      'aria-hidden': 'true'\n    });\n  }\n  /**\n   * Called when a resize is triggered on the iframe or a resize is observed via the ResizeObserver\n   *\n   * @fires Player#playerresize\n   */\n  ;\n\n  _proto.resizeHandler = function resizeHandler() {\n    /**\n     * Called when the player size has changed\n     *\n     * @event Player#playerresize\n     * @type {EventTarget~Event}\n     */\n    // make sure player is still around to trigger\n    // prevents this from causing an error after dispose\n    if (!this.player_ || !this.player_.trigger) {\n      return;\n    }\n\n    this.player_.trigger('playerresize');\n  };\n\n  _proto.dispose = function dispose() {\n    if (this.debouncedHandler_) {\n      this.debouncedHandler_.cancel();\n    }\n\n    if (this.resizeObserver_) {\n      if (this.player_.el()) {\n        this.resizeObserver_.unobserve(this.player_.el());\n      }\n\n      this.resizeObserver_.disconnect();\n    }\n\n    if (this.loadListener_) {\n      this.off('load', this.loadListener_);\n    }\n\n    if (this.el_ && this.el_.contentWindow && this.unloadListener_) {\n      this.unloadListener_.call(this.el_.contentWindow);\n    }\n\n    this.ResizeObserver = null;\n    this.resizeObserver = null;\n    this.debouncedHandler_ = null;\n    this.loadListener_ = null;\n\n    _Component.prototype.dispose.call(this);\n  };\n\n  return ResizeManager;\n}(Component$1);\n\nComponent$1.registerComponent('ResizeManager', ResizeManager);\n\nvar defaults = {\n  trackingThreshold: 20,\n  liveTolerance: 15\n};\n/*\n  track when we are at the live edge, and other helpers for live playback */\n\n/**\n * A class for checking live current time and determining when the player\n * is at or behind the live edge.\n */\n\nvar LiveTracker = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(LiveTracker, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {number} [options.trackingThreshold=20]\n   *        Number of seconds of live window (seekableEnd - seekableStart) that\n   *        media needs to have before the liveui will be shown.\n   *\n   * @param {number} [options.liveTolerance=15]\n   *        Number of seconds behind live that we have to be\n   *        before we will be considered non-live. Note that this will only\n   *        be used when playing at the live edge. This allows large seekable end\n   *        changes to not effect wether we are live or not.\n   */\n  function LiveTracker(player, options) {\n    var _this;\n\n    // LiveTracker does not need an element\n    var options_ = mergeOptions$3(defaults, options, {\n      createEl: false\n    });\n    _this = _Component.call(this, player, options_) || this;\n\n    _this.handleVisibilityChange_ = function (e) {\n      return _this.handleVisibilityChange(e);\n    };\n\n    _this.trackLiveHandler_ = function () {\n      return _this.trackLive_();\n    };\n\n    _this.handlePlay_ = function (e) {\n      return _this.handlePlay(e);\n    };\n\n    _this.handleFirstTimeupdate_ = function (e) {\n      return _this.handleFirstTimeupdate(e);\n    };\n\n    _this.handleSeeked_ = function (e) {\n      return _this.handleSeeked(e);\n    };\n\n    _this.seekToLiveEdge_ = function (e) {\n      return _this.seekToLiveEdge(e);\n    };\n\n    _this.reset_();\n\n    _this.on(_this.player_, 'durationchange', function (e) {\n      return _this.handleDurationchange(e);\n    }); // we should try to toggle tracking on canplay as native playback engines, like Safari\n    // may not have the proper values for things like seekableEnd until then\n\n\n    _this.on(_this.player_, 'canplay', function () {\n      return _this.toggleTracking();\n    }); // we don't need to track live playback if the document is hidden,\n    // also, tracking when the document is hidden can\n    // cause the CPU to spike and eventually crash the page on IE11.\n\n\n    if (IE_VERSION && 'hidden' in document && 'visibilityState' in document) {\n      _this.on(document, 'visibilitychange', _this.handleVisibilityChange_);\n    }\n\n    return _this;\n  }\n  /**\n   * toggle tracking based on document visiblility\n   */\n\n\n  var _proto = LiveTracker.prototype;\n\n  _proto.handleVisibilityChange = function handleVisibilityChange() {\n    if (this.player_.duration() !== Infinity) {\n      return;\n    }\n\n    if (document.hidden) {\n      this.stopTracking();\n    } else {\n      this.startTracking();\n    }\n  }\n  /**\n   * all the functionality for tracking when seek end changes\n   * and for tracking how far past seek end we should be\n   */\n  ;\n\n  _proto.trackLive_ = function trackLive_() {\n    var seekable = this.player_.seekable(); // skip undefined seekable\n\n    if (!seekable || !seekable.length) {\n      return;\n    }\n\n    var newTime = Number(window$1.performance.now().toFixed(4));\n    var deltaTime = this.lastTime_ === -1 ? 0 : (newTime - this.lastTime_) / 1000;\n    this.lastTime_ = newTime;\n    this.pastSeekEnd_ = this.pastSeekEnd() + deltaTime;\n    var liveCurrentTime = this.liveCurrentTime();\n    var currentTime = this.player_.currentTime(); // we are behind live if any are true\n    // 1. the player is paused\n    // 2. the user seeked to a location 2 seconds away from live\n    // 3. the difference between live and current time is greater\n    //    liveTolerance which defaults to 15s\n\n    var isBehind = this.player_.paused() || this.seekedBehindLive_ || Math.abs(liveCurrentTime - currentTime) > this.options_.liveTolerance; // we cannot be behind if\n    // 1. until we have not seen a timeupdate yet\n    // 2. liveCurrentTime is Infinity, which happens on Android and Native Safari\n\n    if (!this.timeupdateSeen_ || liveCurrentTime === Infinity) {\n      isBehind = false;\n    }\n\n    if (isBehind !== this.behindLiveEdge_) {\n      this.behindLiveEdge_ = isBehind;\n      this.trigger('liveedgechange');\n    }\n  }\n  /**\n   * handle a durationchange event on the player\n   * and start/stop tracking accordingly.\n   */\n  ;\n\n  _proto.handleDurationchange = function handleDurationchange() {\n    this.toggleTracking();\n  }\n  /**\n   * start/stop tracking\n   */\n  ;\n\n  _proto.toggleTracking = function toggleTracking() {\n    if (this.player_.duration() === Infinity && this.liveWindow() >= this.options_.trackingThreshold) {\n      if (this.player_.options_.liveui) {\n        this.player_.addClass('vjs-liveui');\n      }\n\n      this.startTracking();\n    } else {\n      this.player_.removeClass('vjs-liveui');\n      this.stopTracking();\n    }\n  }\n  /**\n   * start tracking live playback\n   */\n  ;\n\n  _proto.startTracking = function startTracking() {\n    if (this.isTracking()) {\n      return;\n    } // If we haven't seen a timeupdate, we need to check whether playback\n    // began before this component started tracking. This can happen commonly\n    // when using autoplay.\n\n\n    if (!this.timeupdateSeen_) {\n      this.timeupdateSeen_ = this.player_.hasStarted();\n    }\n\n    this.trackingInterval_ = this.setInterval(this.trackLiveHandler_, UPDATE_REFRESH_INTERVAL);\n    this.trackLive_();\n    this.on(this.player_, ['play', 'pause'], this.trackLiveHandler_);\n\n    if (!this.timeupdateSeen_) {\n      this.one(this.player_, 'play', this.handlePlay_);\n      this.one(this.player_, 'timeupdate', this.handleFirstTimeupdate_);\n    } else {\n      this.on(this.player_, 'seeked', this.handleSeeked_);\n    }\n  }\n  /**\n   * handle the first timeupdate on the player if it wasn't already playing\n   * when live tracker started tracking.\n   */\n  ;\n\n  _proto.handleFirstTimeupdate = function handleFirstTimeupdate() {\n    this.timeupdateSeen_ = true;\n    this.on(this.player_, 'seeked', this.handleSeeked_);\n  }\n  /**\n   * Keep track of what time a seek starts, and listen for seeked\n   * to find where a seek ends.\n   */\n  ;\n\n  _proto.handleSeeked = function handleSeeked() {\n    var timeDiff = Math.abs(this.liveCurrentTime() - this.player_.currentTime());\n    this.seekedBehindLive_ = this.nextSeekedFromUser_ && timeDiff > 2;\n    this.nextSeekedFromUser_ = false;\n    this.trackLive_();\n  }\n  /**\n   * handle the first play on the player, and make sure that we seek\n   * right to the live edge.\n   */\n  ;\n\n  _proto.handlePlay = function handlePlay() {\n    this.one(this.player_, 'timeupdate', this.seekToLiveEdge_);\n  }\n  /**\n   * Stop tracking, and set all internal variables to\n   * their initial value.\n   */\n  ;\n\n  _proto.reset_ = function reset_() {\n    this.lastTime_ = -1;\n    this.pastSeekEnd_ = 0;\n    this.lastSeekEnd_ = -1;\n    this.behindLiveEdge_ = true;\n    this.timeupdateSeen_ = false;\n    this.seekedBehindLive_ = false;\n    this.nextSeekedFromUser_ = false;\n    this.clearInterval(this.trackingInterval_);\n    this.trackingInterval_ = null;\n    this.off(this.player_, ['play', 'pause'], this.trackLiveHandler_);\n    this.off(this.player_, 'seeked', this.handleSeeked_);\n    this.off(this.player_, 'play', this.handlePlay_);\n    this.off(this.player_, 'timeupdate', this.handleFirstTimeupdate_);\n    this.off(this.player_, 'timeupdate', this.seekToLiveEdge_);\n  }\n  /**\n   * The next seeked event is from the user. Meaning that any seek\n   * > 2s behind live will be considered behind live for real and\n   * liveTolerance will be ignored.\n   */\n  ;\n\n  _proto.nextSeekedFromUser = function nextSeekedFromUser() {\n    this.nextSeekedFromUser_ = true;\n  }\n  /**\n   * stop tracking live playback\n   */\n  ;\n\n  _proto.stopTracking = function stopTracking() {\n    if (!this.isTracking()) {\n      return;\n    }\n\n    this.reset_();\n    this.trigger('liveedgechange');\n  }\n  /**\n   * A helper to get the player seekable end\n   * so that we don't have to null check everywhere\n   *\n   * @return {number}\n   *         The furthest seekable end or Infinity.\n   */\n  ;\n\n  _proto.seekableEnd = function seekableEnd() {\n    var seekable = this.player_.seekable();\n    var seekableEnds = [];\n    var i = seekable ? seekable.length : 0;\n\n    while (i--) {\n      seekableEnds.push(seekable.end(i));\n    } // grab the furthest seekable end after sorting, or if there are none\n    // default to Infinity\n\n\n    return seekableEnds.length ? seekableEnds.sort()[seekableEnds.length - 1] : Infinity;\n  }\n  /**\n   * A helper to get the player seekable start\n   * so that we don't have to null check everywhere\n   *\n   * @return {number}\n   *         The earliest seekable start or 0.\n   */\n  ;\n\n  _proto.seekableStart = function seekableStart() {\n    var seekable = this.player_.seekable();\n    var seekableStarts = [];\n    var i = seekable ? seekable.length : 0;\n\n    while (i--) {\n      seekableStarts.push(seekable.start(i));\n    } // grab the first seekable start after sorting, or if there are none\n    // default to 0\n\n\n    return seekableStarts.length ? seekableStarts.sort()[0] : 0;\n  }\n  /**\n   * Get the live time window aka\n   * the amount of time between seekable start and\n   * live current time.\n   *\n   * @return {number}\n   *         The amount of seconds that are seekable in\n   *         the live video.\n   */\n  ;\n\n  _proto.liveWindow = function liveWindow() {\n    var liveCurrentTime = this.liveCurrentTime(); // if liveCurrenTime is Infinity then we don't have a liveWindow at all\n\n    if (liveCurrentTime === Infinity) {\n      return 0;\n    }\n\n    return liveCurrentTime - this.seekableStart();\n  }\n  /**\n   * Determines if the player is live, only checks if this component\n   * is tracking live playback or not\n   *\n   * @return {boolean}\n   *         Wether liveTracker is tracking\n   */\n  ;\n\n  _proto.isLive = function isLive() {\n    return this.isTracking();\n  }\n  /**\n   * Determines if currentTime is at the live edge and won't fall behind\n   * on each seekableendchange\n   *\n   * @return {boolean}\n   *         Wether playback is at the live edge\n   */\n  ;\n\n  _proto.atLiveEdge = function atLiveEdge() {\n    return !this.behindLiveEdge();\n  }\n  /**\n   * get what we expect the live current time to be\n   *\n   * @return {number}\n   *         The expected live current time\n   */\n  ;\n\n  _proto.liveCurrentTime = function liveCurrentTime() {\n    return this.pastSeekEnd() + this.seekableEnd();\n  }\n  /**\n   * The number of seconds that have occured after seekable end\n   * changed. This will be reset to 0 once seekable end changes.\n   *\n   * @return {number}\n   *         Seconds past the current seekable end\n   */\n  ;\n\n  _proto.pastSeekEnd = function pastSeekEnd() {\n    var seekableEnd = this.seekableEnd();\n\n    if (this.lastSeekEnd_ !== -1 && seekableEnd !== this.lastSeekEnd_) {\n      this.pastSeekEnd_ = 0;\n    }\n\n    this.lastSeekEnd_ = seekableEnd;\n    return this.pastSeekEnd_;\n  }\n  /**\n   * If we are currently behind the live edge, aka currentTime will be\n   * behind on a seekableendchange\n   *\n   * @return {boolean}\n   *         If we are behind the live edge\n   */\n  ;\n\n  _proto.behindLiveEdge = function behindLiveEdge() {\n    return this.behindLiveEdge_;\n  }\n  /**\n   * Wether live tracker is currently tracking or not.\n   */\n  ;\n\n  _proto.isTracking = function isTracking() {\n    return typeof this.trackingInterval_ === 'number';\n  }\n  /**\n   * Seek to the live edge if we are behind the live edge\n   */\n  ;\n\n  _proto.seekToLiveEdge = function seekToLiveEdge() {\n    this.seekedBehindLive_ = false;\n\n    if (this.atLiveEdge()) {\n      return;\n    }\n\n    this.nextSeekedFromUser_ = false;\n    this.player_.currentTime(this.liveCurrentTime());\n  }\n  /**\n   * Dispose of liveTracker\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    this.off(document, 'visibilitychange', this.handleVisibilityChange_);\n    this.stopTracking();\n\n    _Component.prototype.dispose.call(this);\n  };\n\n  return LiveTracker;\n}(Component$1);\n\nComponent$1.registerComponent('LiveTracker', LiveTracker);\n\n/**\n * This function is used to fire a sourceset when there is something\n * similar to `mediaEl.load()` being called. It will try to find the source via\n * the `src` attribute and then the `<source>` elements. It will then fire `sourceset`\n * with the source that was found or empty string if we cannot know. If it cannot\n * find a source then `sourceset` will not be fired.\n *\n * @param {Html5} tech\n *        The tech object that sourceset was setup on\n *\n * @return {boolean}\n *         returns false if the sourceset was not fired and true otherwise.\n */\n\nvar sourcesetLoad = function sourcesetLoad(tech) {\n  var el = tech.el(); // if `el.src` is set, that source will be loaded.\n\n  if (el.hasAttribute('src')) {\n    tech.triggerSourceset(el.src);\n    return true;\n  }\n  /**\n   * Since there isn't a src property on the media element, source elements will be used for\n   * implementing the source selection algorithm. This happens asynchronously and\n   * for most cases were there is more than one source we cannot tell what source will\n   * be loaded, without re-implementing the source selection algorithm. At this time we are not\n   * going to do that. There are three special cases that we do handle here though:\n   *\n   * 1. If there are no sources, do not fire `sourceset`.\n   * 2. If there is only one `<source>` with a `src` property/attribute that is our `src`\n   * 3. If there is more than one `<source>` but all of them have the same `src` url.\n   *    That will be our src.\n   */\n\n\n  var sources = tech.$$('source');\n  var srcUrls = [];\n  var src = ''; // if there are no sources, do not fire sourceset\n\n  if (!sources.length) {\n    return false;\n  } // only count valid/non-duplicate source elements\n\n\n  for (var i = 0; i < sources.length; i++) {\n    var url = sources[i].src;\n\n    if (url && srcUrls.indexOf(url) === -1) {\n      srcUrls.push(url);\n    }\n  } // there were no valid sources\n\n\n  if (!srcUrls.length) {\n    return false;\n  } // there is only one valid source element url\n  // use that\n\n\n  if (srcUrls.length === 1) {\n    src = srcUrls[0];\n  }\n\n  tech.triggerSourceset(src);\n  return true;\n};\n/**\n * our implementation of an `innerHTML` descriptor for browsers\n * that do not have one.\n */\n\n\nvar innerHTMLDescriptorPolyfill = Object.defineProperty({}, 'innerHTML', {\n  get: function get() {\n    return this.cloneNode(true).innerHTML;\n  },\n  set: function set(v) {\n    // make a dummy node to use innerHTML on\n    var dummy = document.createElement(this.nodeName.toLowerCase()); // set innerHTML to the value provided\n\n    dummy.innerHTML = v; // make a document fragment to hold the nodes from dummy\n\n    var docFrag = document.createDocumentFragment(); // copy all of the nodes created by the innerHTML on dummy\n    // to the document fragment\n\n    while (dummy.childNodes.length) {\n      docFrag.appendChild(dummy.childNodes[0]);\n    } // remove content\n\n\n    this.innerText = ''; // now we add all of that html in one by appending the\n    // document fragment. This is how innerHTML does it.\n\n    window$1.Element.prototype.appendChild.call(this, docFrag); // then return the result that innerHTML's setter would\n\n    return this.innerHTML;\n  }\n});\n/**\n * Get a property descriptor given a list of priorities and the\n * property to get.\n */\n\nvar getDescriptor = function getDescriptor(priority, prop) {\n  var descriptor = {};\n\n  for (var i = 0; i < priority.length; i++) {\n    descriptor = Object.getOwnPropertyDescriptor(priority[i], prop);\n\n    if (descriptor && descriptor.set && descriptor.get) {\n      break;\n    }\n  }\n\n  descriptor.enumerable = true;\n  descriptor.configurable = true;\n  return descriptor;\n};\n\nvar getInnerHTMLDescriptor = function getInnerHTMLDescriptor(tech) {\n  return getDescriptor([tech.el(), window$1.HTMLMediaElement.prototype, window$1.Element.prototype, innerHTMLDescriptorPolyfill], 'innerHTML');\n};\n/**\n * Patches browser internal functions so that we can tell synchronously\n * if a `<source>` was appended to the media element. For some reason this\n * causes a `sourceset` if the the media element is ready and has no source.\n * This happens when:\n * - The page has just loaded and the media element does not have a source.\n * - The media element was emptied of all sources, then `load()` was called.\n *\n * It does this by patching the following functions/properties when they are supported:\n *\n * - `append()` - can be used to add a `<source>` element to the media element\n * - `appendChild()` - can be used to add a `<source>` element to the media element\n * - `insertAdjacentHTML()` -  can be used to add a `<source>` element to the media element\n * - `innerHTML` -  can be used to add a `<source>` element to the media element\n *\n * @param {Html5} tech\n *        The tech object that sourceset is being setup on.\n */\n\n\nvar firstSourceWatch = function firstSourceWatch(tech) {\n  var el = tech.el(); // make sure firstSourceWatch isn't setup twice.\n\n  if (el.resetSourceWatch_) {\n    return;\n  }\n\n  var old = {};\n  var innerDescriptor = getInnerHTMLDescriptor(tech);\n\n  var appendWrapper = function appendWrapper(appendFn) {\n    return function () {\n      for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n        args[_key] = arguments[_key];\n      }\n\n      var retval = appendFn.apply(el, args);\n      sourcesetLoad(tech);\n      return retval;\n    };\n  };\n\n  ['append', 'appendChild', 'insertAdjacentHTML'].forEach(function (k) {\n    if (!el[k]) {\n      return;\n    } // store the old function\n\n\n    old[k] = el[k]; // call the old function with a sourceset if a source\n    // was loaded\n\n    el[k] = appendWrapper(old[k]);\n  });\n  Object.defineProperty(el, 'innerHTML', mergeOptions$3(innerDescriptor, {\n    set: appendWrapper(innerDescriptor.set)\n  }));\n\n  el.resetSourceWatch_ = function () {\n    el.resetSourceWatch_ = null;\n    Object.keys(old).forEach(function (k) {\n      el[k] = old[k];\n    });\n    Object.defineProperty(el, 'innerHTML', innerDescriptor);\n  }; // on the first sourceset, we need to revert our changes\n\n\n  tech.one('sourceset', el.resetSourceWatch_);\n};\n/**\n * our implementation of a `src` descriptor for browsers\n * that do not have one.\n */\n\n\nvar srcDescriptorPolyfill = Object.defineProperty({}, 'src', {\n  get: function get() {\n    if (this.hasAttribute('src')) {\n      return getAbsoluteURL(window$1.Element.prototype.getAttribute.call(this, 'src'));\n    }\n\n    return '';\n  },\n  set: function set(v) {\n    window$1.Element.prototype.setAttribute.call(this, 'src', v);\n    return v;\n  }\n});\n\nvar getSrcDescriptor = function getSrcDescriptor(tech) {\n  return getDescriptor([tech.el(), window$1.HTMLMediaElement.prototype, srcDescriptorPolyfill], 'src');\n};\n/**\n * setup `sourceset` handling on the `Html5` tech. This function\n * patches the following element properties/functions:\n *\n * - `src` - to determine when `src` is set\n * - `setAttribute()` - to determine when `src` is set\n * - `load()` - this re-triggers the source selection algorithm, and can\n *              cause a sourceset.\n *\n * If there is no source when we are adding `sourceset` support or during a `load()`\n * we also patch the functions listed in `firstSourceWatch`.\n *\n * @param {Html5} tech\n *        The tech to patch\n */\n\n\nvar setupSourceset = function setupSourceset(tech) {\n  if (!tech.featuresSourceset) {\n    return;\n  }\n\n  var el = tech.el(); // make sure sourceset isn't setup twice.\n\n  if (el.resetSourceset_) {\n    return;\n  }\n\n  var srcDescriptor = getSrcDescriptor(tech);\n  var oldSetAttribute = el.setAttribute;\n  var oldLoad = el.load;\n  Object.defineProperty(el, 'src', mergeOptions$3(srcDescriptor, {\n    set: function set(v) {\n      var retval = srcDescriptor.set.call(el, v); // we use the getter here to get the actual value set on src\n\n      tech.triggerSourceset(el.src);\n      return retval;\n    }\n  }));\n\n  el.setAttribute = function (n, v) {\n    var retval = oldSetAttribute.call(el, n, v);\n\n    if (/src/i.test(n)) {\n      tech.triggerSourceset(el.src);\n    }\n\n    return retval;\n  };\n\n  el.load = function () {\n    var retval = oldLoad.call(el); // if load was called, but there was no source to fire\n    // sourceset on. We have to watch for a source append\n    // as that can trigger a `sourceset` when the media element\n    // has no source\n\n    if (!sourcesetLoad(tech)) {\n      tech.triggerSourceset('');\n      firstSourceWatch(tech);\n    }\n\n    return retval;\n  };\n\n  if (el.currentSrc) {\n    tech.triggerSourceset(el.currentSrc);\n  } else if (!sourcesetLoad(tech)) {\n    firstSourceWatch(tech);\n  }\n\n  el.resetSourceset_ = function () {\n    el.resetSourceset_ = null;\n    el.load = oldLoad;\n    el.setAttribute = oldSetAttribute;\n    Object.defineProperty(el, 'src', srcDescriptor);\n\n    if (el.resetSourceWatch_) {\n      el.resetSourceWatch_();\n    }\n  };\n};\n\n/**\n * Object.defineProperty but \"lazy\", which means that the value is only set after\n * it retrieved the first time, rather than being set right away.\n *\n * @param {Object} obj the object to set the property on\n * @param {string} key the key for the property to set\n * @param {Function} getValue the function used to get the value when it is needed.\n * @param {boolean} setter wether a setter shoould be allowed or not\n */\nvar defineLazyProperty = function defineLazyProperty(obj, key, getValue, setter) {\n  if (setter === void 0) {\n    setter = true;\n  }\n\n  var set = function set(value) {\n    return Object.defineProperty(obj, key, {\n      value: value,\n      enumerable: true,\n      writable: true\n    });\n  };\n\n  var options = {\n    configurable: true,\n    enumerable: true,\n    get: function get() {\n      var value = getValue();\n      set(value);\n      return value;\n    }\n  };\n\n  if (setter) {\n    options.set = set;\n  }\n\n  return Object.defineProperty(obj, key, options);\n};\n\n/**\n * HTML5 Media Controller - Wrapper for HTML5 Media API\n *\n * @mixes Tech~SourceHandlerAdditions\n * @extends Tech\n */\n\nvar Html5 = /*#__PURE__*/function (_Tech) {\n  _inheritsLoose(Html5, _Tech);\n\n  /**\n  * Create an instance of this Tech.\n  *\n  * @param {Object} [options]\n  *        The key/value store of player options.\n  *\n  * @param {Component~ReadyCallback} ready\n  *        Callback function to call when the `HTML5` Tech is ready.\n  */\n  function Html5(options, ready) {\n    var _this;\n\n    _this = _Tech.call(this, options, ready) || this;\n    var source = options.source;\n    var crossoriginTracks = false; // Set the source if one is provided\n    // 1) Check if the source is new (if not, we want to keep the original so playback isn't interrupted)\n    // 2) Check to see if the network state of the tag was failed at init, and if so, reset the source\n    // anyway so the error gets fired.\n\n    if (source && (_this.el_.currentSrc !== source.src || options.tag && options.tag.initNetworkState_ === 3)) {\n      _this.setSource(source);\n    } else {\n      _this.handleLateInit_(_this.el_);\n    } // setup sourceset after late sourceset/init\n\n\n    if (options.enableSourceset) {\n      _this.setupSourcesetHandling_();\n    }\n\n    _this.isScrubbing_ = false;\n\n    if (_this.el_.hasChildNodes()) {\n      var nodes = _this.el_.childNodes;\n      var nodesLength = nodes.length;\n      var removeNodes = [];\n\n      while (nodesLength--) {\n        var node = nodes[nodesLength];\n        var nodeName = node.nodeName.toLowerCase();\n\n        if (nodeName === 'track') {\n          if (!_this.featuresNativeTextTracks) {\n            // Empty video tag tracks so the built-in player doesn't use them also.\n            // This may not be fast enough to stop HTML5 browsers from reading the tags\n            // so we'll need to turn off any default tracks if we're manually doing\n            // captions and subtitles. videoElement.textTracks\n            removeNodes.push(node);\n          } else {\n            // store HTMLTrackElement and TextTrack to remote list\n            _this.remoteTextTrackEls().addTrackElement_(node);\n\n            _this.remoteTextTracks().addTrack(node.track);\n\n            _this.textTracks().addTrack(node.track);\n\n            if (!crossoriginTracks && !_this.el_.hasAttribute('crossorigin') && isCrossOrigin(node.src)) {\n              crossoriginTracks = true;\n            }\n          }\n        }\n      }\n\n      for (var i = 0; i < removeNodes.length; i++) {\n        _this.el_.removeChild(removeNodes[i]);\n      }\n    }\n\n    _this.proxyNativeTracks_();\n\n    if (_this.featuresNativeTextTracks && crossoriginTracks) {\n      log$1.warn('Text Tracks are being loaded from another origin but the crossorigin attribute isn\\'t used.\\n' + 'This may prevent text tracks from loading.');\n    } // prevent iOS Safari from disabling metadata text tracks during native playback\n\n\n    _this.restoreMetadataTracksInIOSNativePlayer_(); // Determine if native controls should be used\n    // Our goal should be to get the custom controls on mobile solid everywhere\n    // so we can remove this all together. Right now this will block custom\n    // controls on touch enabled laptops like the Chrome Pixel\n\n\n    if ((TOUCH_ENABLED || IS_IPHONE || IS_NATIVE_ANDROID) && options.nativeControlsForTouch === true) {\n      _this.setControls(true);\n    } // on iOS, we want to proxy `webkitbeginfullscreen` and `webkitendfullscreen`\n    // into a `fullscreenchange` event\n\n\n    _this.proxyWebkitFullscreen_();\n\n    _this.triggerReady();\n\n    return _this;\n  }\n  /**\n   * Dispose of `HTML5` media element and remove all tracks.\n   */\n\n\n  var _proto = Html5.prototype;\n\n  _proto.dispose = function dispose() {\n    if (this.el_ && this.el_.resetSourceset_) {\n      this.el_.resetSourceset_();\n    }\n\n    Html5.disposeMediaElement(this.el_);\n    this.options_ = null; // tech will handle clearing of the emulated track list\n\n    _Tech.prototype.dispose.call(this);\n  }\n  /**\n   * Modify the media element so that we can detect when\n   * the source is changed. Fires `sourceset` just after the source has changed\n   */\n  ;\n\n  _proto.setupSourcesetHandling_ = function setupSourcesetHandling_() {\n    setupSourceset(this);\n  }\n  /**\n   * When a captions track is enabled in the iOS Safari native player, all other\n   * tracks are disabled (including metadata tracks), which nulls all of their\n   * associated cue points. This will restore metadata tracks to their pre-fullscreen\n   * state in those cases so that cue points are not needlessly lost.\n   *\n   * @private\n   */\n  ;\n\n  _proto.restoreMetadataTracksInIOSNativePlayer_ = function restoreMetadataTracksInIOSNativePlayer_() {\n    var textTracks = this.textTracks();\n    var metadataTracksPreFullscreenState; // captures a snapshot of every metadata track's current state\n\n    var takeMetadataTrackSnapshot = function takeMetadataTrackSnapshot() {\n      metadataTracksPreFullscreenState = [];\n\n      for (var i = 0; i < textTracks.length; i++) {\n        var track = textTracks[i];\n\n        if (track.kind === 'metadata') {\n          metadataTracksPreFullscreenState.push({\n            track: track,\n            storedMode: track.mode\n          });\n        }\n      }\n    }; // snapshot each metadata track's initial state, and update the snapshot\n    // each time there is a track 'change' event\n\n\n    takeMetadataTrackSnapshot();\n    textTracks.addEventListener('change', takeMetadataTrackSnapshot);\n    this.on('dispose', function () {\n      return textTracks.removeEventListener('change', takeMetadataTrackSnapshot);\n    });\n\n    var restoreTrackMode = function restoreTrackMode() {\n      for (var i = 0; i < metadataTracksPreFullscreenState.length; i++) {\n        var storedTrack = metadataTracksPreFullscreenState[i];\n\n        if (storedTrack.track.mode === 'disabled' && storedTrack.track.mode !== storedTrack.storedMode) {\n          storedTrack.track.mode = storedTrack.storedMode;\n        }\n      } // we only want this handler to be executed on the first 'change' event\n\n\n      textTracks.removeEventListener('change', restoreTrackMode);\n    }; // when we enter fullscreen playback, stop updating the snapshot and\n    // restore all track modes to their pre-fullscreen state\n\n\n    this.on('webkitbeginfullscreen', function () {\n      textTracks.removeEventListener('change', takeMetadataTrackSnapshot); // remove the listener before adding it just in case it wasn't previously removed\n\n      textTracks.removeEventListener('change', restoreTrackMode);\n      textTracks.addEventListener('change', restoreTrackMode);\n    }); // start updating the snapshot again after leaving fullscreen\n\n    this.on('webkitendfullscreen', function () {\n      // remove the listener before adding it just in case it wasn't previously removed\n      textTracks.removeEventListener('change', takeMetadataTrackSnapshot);\n      textTracks.addEventListener('change', takeMetadataTrackSnapshot); // remove the restoreTrackMode handler in case it wasn't triggered during fullscreen playback\n\n      textTracks.removeEventListener('change', restoreTrackMode);\n    });\n  }\n  /**\n   * Attempt to force override of tracks for the given type\n   *\n   * @param {string} type - Track type to override, possible values include 'Audio',\n   * 'Video', and 'Text'.\n   * @param {boolean} override - If set to true native audio/video will be overridden,\n   * otherwise native audio/video will potentially be used.\n   * @private\n   */\n  ;\n\n  _proto.overrideNative_ = function overrideNative_(type, override) {\n    var _this2 = this;\n\n    // If there is no behavioral change don't add/remove listeners\n    if (override !== this[\"featuresNative\" + type + \"Tracks\"]) {\n      return;\n    }\n\n    var lowerCaseType = type.toLowerCase();\n\n    if (this[lowerCaseType + \"TracksListeners_\"]) {\n      Object.keys(this[lowerCaseType + \"TracksListeners_\"]).forEach(function (eventName) {\n        var elTracks = _this2.el()[lowerCaseType + \"Tracks\"];\n\n        elTracks.removeEventListener(eventName, _this2[lowerCaseType + \"TracksListeners_\"][eventName]);\n      });\n    }\n\n    this[\"featuresNative\" + type + \"Tracks\"] = !override;\n    this[lowerCaseType + \"TracksListeners_\"] = null;\n    this.proxyNativeTracksForType_(lowerCaseType);\n  }\n  /**\n   * Attempt to force override of native audio tracks.\n   *\n   * @param {boolean} override - If set to true native audio will be overridden,\n   * otherwise native audio will potentially be used.\n   */\n  ;\n\n  _proto.overrideNativeAudioTracks = function overrideNativeAudioTracks(override) {\n    this.overrideNative_('Audio', override);\n  }\n  /**\n   * Attempt to force override of native video tracks.\n   *\n   * @param {boolean} override - If set to true native video will be overridden,\n   * otherwise native video will potentially be used.\n   */\n  ;\n\n  _proto.overrideNativeVideoTracks = function overrideNativeVideoTracks(override) {\n    this.overrideNative_('Video', override);\n  }\n  /**\n   * Proxy native track list events for the given type to our track\n   * lists if the browser we are playing in supports that type of track list.\n   *\n   * @param {string} name - Track type; values include 'audio', 'video', and 'text'\n   * @private\n   */\n  ;\n\n  _proto.proxyNativeTracksForType_ = function proxyNativeTracksForType_(name) {\n    var _this3 = this;\n\n    var props = NORMAL[name];\n    var elTracks = this.el()[props.getterName];\n    var techTracks = this[props.getterName]();\n\n    if (!this[\"featuresNative\" + props.capitalName + \"Tracks\"] || !elTracks || !elTracks.addEventListener) {\n      return;\n    }\n\n    var listeners = {\n      change: function change(e) {\n        var event = {\n          type: 'change',\n          target: techTracks,\n          currentTarget: techTracks,\n          srcElement: techTracks\n        };\n        techTracks.trigger(event); // if we are a text track change event, we should also notify the\n        // remote text track list. This can potentially cause a false positive\n        // if we were to get a change event on a non-remote track and\n        // we triggered the event on the remote text track list which doesn't\n        // contain that track. However, best practices mean looping through the\n        // list of tracks and searching for the appropriate mode value, so,\n        // this shouldn't pose an issue\n\n        if (name === 'text') {\n          _this3[REMOTE.remoteText.getterName]().trigger(event);\n        }\n      },\n      addtrack: function addtrack(e) {\n        techTracks.addTrack(e.track);\n      },\n      removetrack: function removetrack(e) {\n        techTracks.removeTrack(e.track);\n      }\n    };\n\n    var removeOldTracks = function removeOldTracks() {\n      var removeTracks = [];\n\n      for (var i = 0; i < techTracks.length; i++) {\n        var found = false;\n\n        for (var j = 0; j < elTracks.length; j++) {\n          if (elTracks[j] === techTracks[i]) {\n            found = true;\n            break;\n          }\n        }\n\n        if (!found) {\n          removeTracks.push(techTracks[i]);\n        }\n      }\n\n      while (removeTracks.length) {\n        techTracks.removeTrack(removeTracks.shift());\n      }\n    };\n\n    this[props.getterName + 'Listeners_'] = listeners;\n    Object.keys(listeners).forEach(function (eventName) {\n      var listener = listeners[eventName];\n      elTracks.addEventListener(eventName, listener);\n\n      _this3.on('dispose', function (e) {\n        return elTracks.removeEventListener(eventName, listener);\n      });\n    }); // Remove (native) tracks that are not used anymore\n\n    this.on('loadstart', removeOldTracks);\n    this.on('dispose', function (e) {\n      return _this3.off('loadstart', removeOldTracks);\n    });\n  }\n  /**\n   * Proxy all native track list events to our track lists if the browser we are playing\n   * in supports that type of track list.\n   *\n   * @private\n   */\n  ;\n\n  _proto.proxyNativeTracks_ = function proxyNativeTracks_() {\n    var _this4 = this;\n\n    NORMAL.names.forEach(function (name) {\n      _this4.proxyNativeTracksForType_(name);\n    });\n  }\n  /**\n   * Create the `Html5` Tech's DOM element.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n  ;\n\n  _proto.createEl = function createEl() {\n    var el = this.options_.tag; // Check if this browser supports moving the element into the box.\n    // On the iPhone video will break if you move the element,\n    // So we have to create a brand new element.\n    // If we ingested the player div, we do not need to move the media element.\n\n    if (!el || !(this.options_.playerElIngest || this.movingMediaElementInDOM)) {\n      // If the original tag is still there, clone and remove it.\n      if (el) {\n        var clone = el.cloneNode(true);\n\n        if (el.parentNode) {\n          el.parentNode.insertBefore(clone, el);\n        }\n\n        Html5.disposeMediaElement(el);\n        el = clone;\n      } else {\n        el = document.createElement('video'); // determine if native controls should be used\n\n        var tagAttributes = this.options_.tag && getAttributes(this.options_.tag);\n        var attributes = mergeOptions$3({}, tagAttributes);\n\n        if (!TOUCH_ENABLED || this.options_.nativeControlsForTouch !== true) {\n          delete attributes.controls;\n        }\n\n        setAttributes(el, assign(attributes, {\n          id: this.options_.techId,\n          \"class\": 'vjs-tech'\n        }));\n      }\n\n      el.playerId = this.options_.playerId;\n    }\n\n    if (typeof this.options_.preload !== 'undefined') {\n      setAttribute(el, 'preload', this.options_.preload);\n    }\n\n    if (this.options_.disablePictureInPicture !== undefined) {\n      el.disablePictureInPicture = this.options_.disablePictureInPicture;\n    } // Update specific tag settings, in case they were overridden\n    // `autoplay` has to be *last* so that `muted` and `playsinline` are present\n    // when iOS/Safari or other browsers attempt to autoplay.\n\n\n    var settingsAttrs = ['loop', 'muted', 'playsinline', 'autoplay'];\n\n    for (var i = 0; i < settingsAttrs.length; i++) {\n      var attr = settingsAttrs[i];\n      var value = this.options_[attr];\n\n      if (typeof value !== 'undefined') {\n        if (value) {\n          setAttribute(el, attr, attr);\n        } else {\n          removeAttribute(el, attr);\n        }\n\n        el[attr] = value;\n      }\n    }\n\n    return el;\n  }\n  /**\n   * This will be triggered if the loadstart event has already fired, before videojs was\n   * ready. Two known examples of when this can happen are:\n   * 1. If we're loading the playback object after it has started loading\n   * 2. The media is already playing the (often with autoplay on) then\n   *\n   * This function will fire another loadstart so that videojs can catchup.\n   *\n   * @fires Tech#loadstart\n   *\n   * @return {undefined}\n   *         returns nothing.\n   */\n  ;\n\n  _proto.handleLateInit_ = function handleLateInit_(el) {\n    if (el.networkState === 0 || el.networkState === 3) {\n      // The video element hasn't started loading the source yet\n      // or didn't find a source\n      return;\n    }\n\n    if (el.readyState === 0) {\n      // NetworkState is set synchronously BUT loadstart is fired at the\n      // end of the current stack, usually before setInterval(fn, 0).\n      // So at this point we know loadstart may have already fired or is\n      // about to fire, and either way the player hasn't seen it yet.\n      // We don't want to fire loadstart prematurely here and cause a\n      // double loadstart so we'll wait and see if it happens between now\n      // and the next loop, and fire it if not.\n      // HOWEVER, we also want to make sure it fires before loadedmetadata\n      // which could also happen between now and the next loop, so we'll\n      // watch for that also.\n      var loadstartFired = false;\n\n      var setLoadstartFired = function setLoadstartFired() {\n        loadstartFired = true;\n      };\n\n      this.on('loadstart', setLoadstartFired);\n\n      var triggerLoadstart = function triggerLoadstart() {\n        // We did miss the original loadstart. Make sure the player\n        // sees loadstart before loadedmetadata\n        if (!loadstartFired) {\n          this.trigger('loadstart');\n        }\n      };\n\n      this.on('loadedmetadata', triggerLoadstart);\n      this.ready(function () {\n        this.off('loadstart', setLoadstartFired);\n        this.off('loadedmetadata', triggerLoadstart);\n\n        if (!loadstartFired) {\n          // We did miss the original native loadstart. Fire it now.\n          this.trigger('loadstart');\n        }\n      });\n      return;\n    } // From here on we know that loadstart already fired and we missed it.\n    // The other readyState events aren't as much of a problem if we double\n    // them, so not going to go to as much trouble as loadstart to prevent\n    // that unless we find reason to.\n\n\n    var eventsToTrigger = ['loadstart']; // loadedmetadata: newly equal to HAVE_METADATA (1) or greater\n\n    eventsToTrigger.push('loadedmetadata'); // loadeddata: newly increased to HAVE_CURRENT_DATA (2) or greater\n\n    if (el.readyState >= 2) {\n      eventsToTrigger.push('loadeddata');\n    } // canplay: newly increased to HAVE_FUTURE_DATA (3) or greater\n\n\n    if (el.readyState >= 3) {\n      eventsToTrigger.push('canplay');\n    } // canplaythrough: newly equal to HAVE_ENOUGH_DATA (4)\n\n\n    if (el.readyState >= 4) {\n      eventsToTrigger.push('canplaythrough');\n    } // We still need to give the player time to add event listeners\n\n\n    this.ready(function () {\n      eventsToTrigger.forEach(function (type) {\n        this.trigger(type);\n      }, this);\n    });\n  }\n  /**\n   * Set whether we are scrubbing or not.\n   * This is used to decide whether we should use `fastSeek` or not.\n   * `fastSeek` is used to provide trick play on Safari browsers.\n   *\n   * @param {boolean} isScrubbing\n   *                  - true for we are currently scrubbing\n   *                  - false for we are no longer scrubbing\n   */\n  ;\n\n  _proto.setScrubbing = function setScrubbing(isScrubbing) {\n    this.isScrubbing_ = isScrubbing;\n  }\n  /**\n   * Get whether we are scrubbing or not.\n   *\n   * @return {boolean} isScrubbing\n   *                  - true for we are currently scrubbing\n   *                  - false for we are no longer scrubbing\n   */\n  ;\n\n  _proto.scrubbing = function scrubbing() {\n    return this.isScrubbing_;\n  }\n  /**\n   * Set current time for the `HTML5` tech.\n   *\n   * @param {number} seconds\n   *        Set the current time of the media to this.\n   */\n  ;\n\n  _proto.setCurrentTime = function setCurrentTime(seconds) {\n    try {\n      if (this.isScrubbing_ && this.el_.fastSeek && IS_ANY_SAFARI) {\n        this.el_.fastSeek(seconds);\n      } else {\n        this.el_.currentTime = seconds;\n      }\n    } catch (e) {\n      log$1(e, 'Video is not ready. (Video.js)'); // this.warning(VideoJS.warnings.videoNotReady);\n    }\n  }\n  /**\n   * Get the current duration of the HTML5 media element.\n   *\n   * @return {number}\n   *         The duration of the media or 0 if there is no duration.\n   */\n  ;\n\n  _proto.duration = function duration() {\n    var _this5 = this;\n\n    // Android Chrome will report duration as Infinity for VOD HLS until after\n    // playback has started, which triggers the live display erroneously.\n    // Return NaN if playback has not started and trigger a durationupdate once\n    // the duration can be reliably known.\n    if (this.el_.duration === Infinity && IS_ANDROID && IS_CHROME && this.el_.currentTime === 0) {\n      // Wait for the first `timeupdate` with currentTime > 0 - there may be\n      // several with 0\n      var checkProgress = function checkProgress() {\n        if (_this5.el_.currentTime > 0) {\n          // Trigger durationchange for genuinely live video\n          if (_this5.el_.duration === Infinity) {\n            _this5.trigger('durationchange');\n          }\n\n          _this5.off('timeupdate', checkProgress);\n        }\n      };\n\n      this.on('timeupdate', checkProgress);\n      return NaN;\n    }\n\n    return this.el_.duration || NaN;\n  }\n  /**\n   * Get the current width of the HTML5 media element.\n   *\n   * @return {number}\n   *         The width of the HTML5 media element.\n   */\n  ;\n\n  _proto.width = function width() {\n    return this.el_.offsetWidth;\n  }\n  /**\n   * Get the current height of the HTML5 media element.\n   *\n   * @return {number}\n   *         The height of the HTML5 media element.\n   */\n  ;\n\n  _proto.height = function height() {\n    return this.el_.offsetHeight;\n  }\n  /**\n   * Proxy iOS `webkitbeginfullscreen` and `webkitendfullscreen` into\n   * `fullscreenchange` event.\n   *\n   * @private\n   * @fires fullscreenchange\n   * @listens webkitendfullscreen\n   * @listens webkitbeginfullscreen\n   * @listens webkitbeginfullscreen\n   */\n  ;\n\n  _proto.proxyWebkitFullscreen_ = function proxyWebkitFullscreen_() {\n    var _this6 = this;\n\n    if (!('webkitDisplayingFullscreen' in this.el_)) {\n      return;\n    }\n\n    var endFn = function endFn() {\n      this.trigger('fullscreenchange', {\n        isFullscreen: false\n      }); // Safari will sometimes set contols on the videoelement when existing fullscreen.\n\n      if (this.el_.controls && !this.options_.nativeControlsForTouch && this.controls()) {\n        this.el_.controls = false;\n      }\n    };\n\n    var beginFn = function beginFn() {\n      if ('webkitPresentationMode' in this.el_ && this.el_.webkitPresentationMode !== 'picture-in-picture') {\n        this.one('webkitendfullscreen', endFn);\n        this.trigger('fullscreenchange', {\n          isFullscreen: true,\n          // set a flag in case another tech triggers fullscreenchange\n          nativeIOSFullscreen: true\n        });\n      }\n    };\n\n    this.on('webkitbeginfullscreen', beginFn);\n    this.on('dispose', function () {\n      _this6.off('webkitbeginfullscreen', beginFn);\n\n      _this6.off('webkitendfullscreen', endFn);\n    });\n  }\n  /**\n   * Check if fullscreen is supported on the current playback device.\n   *\n   * @return {boolean}\n   *         - True if fullscreen is supported.\n   *         - False if fullscreen is not supported.\n   */\n  ;\n\n  _proto.supportsFullScreen = function supportsFullScreen() {\n    if (typeof this.el_.webkitEnterFullScreen === 'function') {\n      var userAgent = window$1.navigator && window$1.navigator.userAgent || ''; // Seems to be broken in Chromium/Chrome && Safari in Leopard\n\n      if (/Android/.test(userAgent) || !/Chrome|Mac OS X 10.5/.test(userAgent)) {\n        return true;\n      }\n    }\n\n    return false;\n  }\n  /**\n   * Request that the `HTML5` Tech enter fullscreen.\n   */\n  ;\n\n  _proto.enterFullScreen = function enterFullScreen() {\n    var video = this.el_;\n\n    if (video.paused && video.networkState <= video.HAVE_METADATA) {\n      // attempt to prime the video element for programmatic access\n      // this isn't necessary on the desktop but shouldn't hurt\n      silencePromise(this.el_.play()); // playing and pausing synchronously during the transition to fullscreen\n      // can get iOS ~6.1 devices into a play/pause loop\n\n      this.setTimeout(function () {\n        video.pause();\n\n        try {\n          video.webkitEnterFullScreen();\n        } catch (e) {\n          this.trigger('fullscreenerror', e);\n        }\n      }, 0);\n    } else {\n      try {\n        video.webkitEnterFullScreen();\n      } catch (e) {\n        this.trigger('fullscreenerror', e);\n      }\n    }\n  }\n  /**\n   * Request that the `HTML5` Tech exit fullscreen.\n   */\n  ;\n\n  _proto.exitFullScreen = function exitFullScreen() {\n    if (!this.el_.webkitDisplayingFullscreen) {\n      this.trigger('fullscreenerror', new Error('The video is not fullscreen'));\n      return;\n    }\n\n    this.el_.webkitExitFullScreen();\n  }\n  /**\n   * Create a floating video window always on top of other windows so that users may\n   * continue consuming media while they interact with other content sites, or\n   * applications on their device.\n   *\n   * @see [Spec]{@link https://wicg.github.io/picture-in-picture}\n   *\n   * @return {Promise}\n   *         A promise with a Picture-in-Picture window.\n   */\n  ;\n\n  _proto.requestPictureInPicture = function requestPictureInPicture() {\n    return this.el_.requestPictureInPicture();\n  }\n  /**\n   * A getter/setter for the `Html5` Tech's source object.\n   * > Note: Please use {@link Html5#setSource}\n   *\n   * @param {Tech~SourceObject} [src]\n   *        The source object you want to set on the `HTML5` techs element.\n   *\n   * @return {Tech~SourceObject|undefined}\n   *         - The current source object when a source is not passed in.\n   *         - undefined when setting\n   *\n   * @deprecated Since version 5.\n   */\n  ;\n\n  _proto.src = function src(_src) {\n    if (_src === undefined) {\n      return this.el_.src;\n    } // Setting src through `src` instead of `setSrc` will be deprecated\n\n\n    this.setSrc(_src);\n  }\n  /**\n   * Reset the tech by removing all sources and then calling\n   * {@link Html5.resetMediaElement}.\n   */\n  ;\n\n  _proto.reset = function reset() {\n    Html5.resetMediaElement(this.el_);\n  }\n  /**\n   * Get the current source on the `HTML5` Tech. Falls back to returning the source from\n   * the HTML5 media element.\n   *\n   * @return {Tech~SourceObject}\n   *         The current source object from the HTML5 tech. With a fallback to the\n   *         elements source.\n   */\n  ;\n\n  _proto.currentSrc = function currentSrc() {\n    if (this.currentSource_) {\n      return this.currentSource_.src;\n    }\n\n    return this.el_.currentSrc;\n  }\n  /**\n   * Set controls attribute for the HTML5 media Element.\n   *\n   * @param {string} val\n   *        Value to set the controls attribute to\n   */\n  ;\n\n  _proto.setControls = function setControls(val) {\n    this.el_.controls = !!val;\n  }\n  /**\n   * Create and returns a remote {@link TextTrack} object.\n   *\n   * @param {string} kind\n   *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata)\n   *\n   * @param {string} [label]\n   *        Label to identify the text track\n   *\n   * @param {string} [language]\n   *        Two letter language abbreviation\n   *\n   * @return {TextTrack}\n   *         The TextTrack that gets created.\n   */\n  ;\n\n  _proto.addTextTrack = function addTextTrack(kind, label, language) {\n    if (!this.featuresNativeTextTracks) {\n      return _Tech.prototype.addTextTrack.call(this, kind, label, language);\n    }\n\n    return this.el_.addTextTrack(kind, label, language);\n  }\n  /**\n   * Creates either native TextTrack or an emulated TextTrack depending\n   * on the value of `featuresNativeTextTracks`\n   *\n   * @param {Object} options\n   *        The object should contain the options to initialize the TextTrack with.\n   *\n   * @param {string} [options.kind]\n   *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata).\n   *\n   * @param {string} [options.label]\n   *        Label to identify the text track\n   *\n   * @param {string} [options.language]\n   *        Two letter language abbreviation.\n   *\n   * @param {boolean} [options.default]\n   *        Default this track to on.\n   *\n   * @param {string} [options.id]\n   *        The internal id to assign this track.\n   *\n   * @param {string} [options.src]\n   *        A source url for the track.\n   *\n   * @return {HTMLTrackElement}\n   *         The track element that gets created.\n   */\n  ;\n\n  _proto.createRemoteTextTrack = function createRemoteTextTrack(options) {\n    if (!this.featuresNativeTextTracks) {\n      return _Tech.prototype.createRemoteTextTrack.call(this, options);\n    }\n\n    var htmlTrackElement = document.createElement('track');\n\n    if (options.kind) {\n      htmlTrackElement.kind = options.kind;\n    }\n\n    if (options.label) {\n      htmlTrackElement.label = options.label;\n    }\n\n    if (options.language || options.srclang) {\n      htmlTrackElement.srclang = options.language || options.srclang;\n    }\n\n    if (options[\"default\"]) {\n      htmlTrackElement[\"default\"] = options[\"default\"];\n    }\n\n    if (options.id) {\n      htmlTrackElement.id = options.id;\n    }\n\n    if (options.src) {\n      htmlTrackElement.src = options.src;\n    }\n\n    return htmlTrackElement;\n  }\n  /**\n   * Creates a remote text track object and returns an html track element.\n   *\n   * @param {Object} options The object should contain values for\n   * kind, language, label, and src (location of the WebVTT file)\n   * @param {boolean} [manualCleanup=true] if set to false, the TextTrack will be\n   * automatically removed from the video element whenever the source changes\n   * @return {HTMLTrackElement} An Html Track Element.\n   * This can be an emulated {@link HTMLTrackElement} or a native one.\n   * @deprecated The default value of the \"manualCleanup\" parameter will default\n   * to \"false\" in upcoming versions of Video.js\n   */\n  ;\n\n  _proto.addRemoteTextTrack = function addRemoteTextTrack(options, manualCleanup) {\n    var htmlTrackElement = _Tech.prototype.addRemoteTextTrack.call(this, options, manualCleanup);\n\n    if (this.featuresNativeTextTracks) {\n      this.el().appendChild(htmlTrackElement);\n    }\n\n    return htmlTrackElement;\n  }\n  /**\n   * Remove remote `TextTrack` from `TextTrackList` object\n   *\n   * @param {TextTrack} track\n   *        `TextTrack` object to remove\n   */\n  ;\n\n  _proto.removeRemoteTextTrack = function removeRemoteTextTrack(track) {\n    _Tech.prototype.removeRemoteTextTrack.call(this, track);\n\n    if (this.featuresNativeTextTracks) {\n      var tracks = this.$$('track');\n      var i = tracks.length;\n\n      while (i--) {\n        if (track === tracks[i] || track === tracks[i].track) {\n          this.el().removeChild(tracks[i]);\n        }\n      }\n    }\n  }\n  /**\n   * Gets available media playback quality metrics as specified by the W3C's Media\n   * Playback Quality API.\n   *\n   * @see [Spec]{@link https://wicg.github.io/media-playback-quality}\n   *\n   * @return {Object}\n   *         An object with supported media playback quality metrics\n   */\n  ;\n\n  _proto.getVideoPlaybackQuality = function getVideoPlaybackQuality() {\n    if (typeof this.el().getVideoPlaybackQuality === 'function') {\n      return this.el().getVideoPlaybackQuality();\n    }\n\n    var videoPlaybackQuality = {};\n\n    if (typeof this.el().webkitDroppedFrameCount !== 'undefined' && typeof this.el().webkitDecodedFrameCount !== 'undefined') {\n      videoPlaybackQuality.droppedVideoFrames = this.el().webkitDroppedFrameCount;\n      videoPlaybackQuality.totalVideoFrames = this.el().webkitDecodedFrameCount;\n    }\n\n    if (window$1.performance && typeof window$1.performance.now === 'function') {\n      videoPlaybackQuality.creationTime = window$1.performance.now();\n    } else if (window$1.performance && window$1.performance.timing && typeof window$1.performance.timing.navigationStart === 'number') {\n      videoPlaybackQuality.creationTime = window$1.Date.now() - window$1.performance.timing.navigationStart;\n    }\n\n    return videoPlaybackQuality;\n  };\n\n  return Html5;\n}(Tech);\n/* HTML5 Support Testing ---------------------------------------------------- */\n\n/**\n * Element for testing browser HTML5 media capabilities\n *\n * @type {Element}\n * @constant\n * @private\n */\n\n\ndefineLazyProperty(Html5, 'TEST_VID', function () {\n  if (!isReal()) {\n    return;\n  }\n\n  var video = document.createElement('video');\n  var track = document.createElement('track');\n  track.kind = 'captions';\n  track.srclang = 'en';\n  track.label = 'English';\n  video.appendChild(track);\n  return video;\n});\n/**\n * Check if HTML5 media is supported by this browser/device.\n *\n * @return {boolean}\n *         - True if HTML5 media is supported.\n *         - False if HTML5 media is not supported.\n */\n\nHtml5.isSupported = function () {\n  // IE with no Media Player is a LIAR! (#984)\n  try {\n    Html5.TEST_VID.volume = 0.5;\n  } catch (e) {\n    return false;\n  }\n\n  return !!(Html5.TEST_VID && Html5.TEST_VID.canPlayType);\n};\n/**\n * Check if the tech can support the given type\n *\n * @param {string} type\n *        The mimetype to check\n * @return {string} 'probably', 'maybe', or '' (empty string)\n */\n\n\nHtml5.canPlayType = function (type) {\n  return Html5.TEST_VID.canPlayType(type);\n};\n/**\n * Check if the tech can support the given source\n *\n * @param {Object} srcObj\n *        The source object\n * @param {Object} options\n *        The options passed to the tech\n * @return {string} 'probably', 'maybe', or '' (empty string)\n */\n\n\nHtml5.canPlaySource = function (srcObj, options) {\n  return Html5.canPlayType(srcObj.type);\n};\n/**\n * Check if the volume can be changed in this browser/device.\n * Volume cannot be changed in a lot of mobile devices.\n * Specifically, it can't be changed from 1 on iOS.\n *\n * @return {boolean}\n *         - True if volume can be controlled\n *         - False otherwise\n */\n\n\nHtml5.canControlVolume = function () {\n  // IE will error if Windows Media Player not installed #3315\n  try {\n    var volume = Html5.TEST_VID.volume;\n    Html5.TEST_VID.volume = volume / 2 + 0.1;\n    var canControl = volume !== Html5.TEST_VID.volume; // With the introduction of iOS 15, there are cases where the volume is read as\n    // changed but reverts back to its original state at the start of the next tick.\n    // To determine whether volume can be controlled on iOS,\n    // a timeout is set and the volume is checked asynchronously.\n    // Since `features` doesn't currently work asynchronously, the value is manually set.\n\n    if (canControl && IS_IOS) {\n      window$1.setTimeout(function () {\n        if (Html5 && Html5.prototype) {\n          Html5.prototype.featuresVolumeControl = volume !== Html5.TEST_VID.volume;\n        }\n      }); // default iOS to false, which will be updated in the timeout above.\n\n      return false;\n    }\n\n    return canControl;\n  } catch (e) {\n    return false;\n  }\n};\n/**\n * Check if the volume can be muted in this browser/device.\n * Some devices, e.g. iOS, don't allow changing volume\n * but permits muting/unmuting.\n *\n * @return {bolean}\n *      - True if volume can be muted\n *      - False otherwise\n */\n\n\nHtml5.canMuteVolume = function () {\n  try {\n    var muted = Html5.TEST_VID.muted; // in some versions of iOS muted property doesn't always\n    // work, so we want to set both property and attribute\n\n    Html5.TEST_VID.muted = !muted;\n\n    if (Html5.TEST_VID.muted) {\n      setAttribute(Html5.TEST_VID, 'muted', 'muted');\n    } else {\n      removeAttribute(Html5.TEST_VID, 'muted', 'muted');\n    }\n\n    return muted !== Html5.TEST_VID.muted;\n  } catch (e) {\n    return false;\n  }\n};\n/**\n * Check if the playback rate can be changed in this browser/device.\n *\n * @return {boolean}\n *         - True if playback rate can be controlled\n *         - False otherwise\n */\n\n\nHtml5.canControlPlaybackRate = function () {\n  // Playback rate API is implemented in Android Chrome, but doesn't do anything\n  // https://github.com/videojs/video.js/issues/3180\n  if (IS_ANDROID && IS_CHROME && CHROME_VERSION < 58) {\n    return false;\n  } // IE will error if Windows Media Player not installed #3315\n\n\n  try {\n    var playbackRate = Html5.TEST_VID.playbackRate;\n    Html5.TEST_VID.playbackRate = playbackRate / 2 + 0.1;\n    return playbackRate !== Html5.TEST_VID.playbackRate;\n  } catch (e) {\n    return false;\n  }\n};\n/**\n * Check if we can override a video/audio elements attributes, with\n * Object.defineProperty.\n *\n * @return {boolean}\n *         - True if builtin attributes can be overridden\n *         - False otherwise\n */\n\n\nHtml5.canOverrideAttributes = function () {\n  // if we cannot overwrite the src/innerHTML property, there is no support\n  // iOS 7 safari for instance cannot do this.\n  try {\n    var noop = function noop() {};\n\n    Object.defineProperty(document.createElement('video'), 'src', {\n      get: noop,\n      set: noop\n    });\n    Object.defineProperty(document.createElement('audio'), 'src', {\n      get: noop,\n      set: noop\n    });\n    Object.defineProperty(document.createElement('video'), 'innerHTML', {\n      get: noop,\n      set: noop\n    });\n    Object.defineProperty(document.createElement('audio'), 'innerHTML', {\n      get: noop,\n      set: noop\n    });\n  } catch (e) {\n    return false;\n  }\n\n  return true;\n};\n/**\n * Check to see if native `TextTrack`s are supported by this browser/device.\n *\n * @return {boolean}\n *         - True if native `TextTrack`s are supported.\n *         - False otherwise\n */\n\n\nHtml5.supportsNativeTextTracks = function () {\n  return IS_ANY_SAFARI || IS_IOS && IS_CHROME;\n};\n/**\n * Check to see if native `VideoTrack`s are supported by this browser/device\n *\n * @return {boolean}\n *        - True if native `VideoTrack`s are supported.\n *        - False otherwise\n */\n\n\nHtml5.supportsNativeVideoTracks = function () {\n  return !!(Html5.TEST_VID && Html5.TEST_VID.videoTracks);\n};\n/**\n * Check to see if native `AudioTrack`s are supported by this browser/device\n *\n * @return {boolean}\n *        - True if native `AudioTrack`s are supported.\n *        - False otherwise\n */\n\n\nHtml5.supportsNativeAudioTracks = function () {\n  return !!(Html5.TEST_VID && Html5.TEST_VID.audioTracks);\n};\n/**\n * An array of events available on the Html5 tech.\n *\n * @private\n * @type {Array}\n */\n\n\nHtml5.Events = ['loadstart', 'suspend', 'abort', 'error', 'emptied', 'stalled', 'loadedmetadata', 'loadeddata', 'canplay', 'canplaythrough', 'playing', 'waiting', 'seeking', 'seeked', 'ended', 'durationchange', 'timeupdate', 'progress', 'play', 'pause', 'ratechange', 'resize', 'volumechange'];\n/**\n * Boolean indicating whether the `Tech` supports volume control.\n *\n * @type {boolean}\n * @default {@link Html5.canControlVolume}\n */\n\n/**\n * Boolean indicating whether the `Tech` supports muting volume.\n *\n * @type {bolean}\n * @default {@link Html5.canMuteVolume}\n */\n\n/**\n * Boolean indicating whether the `Tech` supports changing the speed at which the media\n * plays. Examples:\n *   - Set player to play 2x (twice) as fast\n *   - Set player to play 0.5x (half) as fast\n *\n * @type {boolean}\n * @default {@link Html5.canControlPlaybackRate}\n */\n\n/**\n * Boolean indicating whether the `Tech` supports the `sourceset` event.\n *\n * @type {boolean}\n * @default\n */\n\n/**\n * Boolean indicating whether the `HTML5` tech currently supports native `TextTrack`s.\n *\n * @type {boolean}\n * @default {@link Html5.supportsNativeTextTracks}\n */\n\n/**\n * Boolean indicating whether the `HTML5` tech currently supports native `VideoTrack`s.\n *\n * @type {boolean}\n * @default {@link Html5.supportsNativeVideoTracks}\n */\n\n/**\n * Boolean indicating whether the `HTML5` tech currently supports native `AudioTrack`s.\n *\n * @type {boolean}\n * @default {@link Html5.supportsNativeAudioTracks}\n */\n\n[['featuresMuteControl', 'canMuteVolume'], ['featuresPlaybackRate', 'canControlPlaybackRate'], ['featuresSourceset', 'canOverrideAttributes'], ['featuresNativeTextTracks', 'supportsNativeTextTracks'], ['featuresNativeVideoTracks', 'supportsNativeVideoTracks'], ['featuresNativeAudioTracks', 'supportsNativeAudioTracks']].forEach(function (_ref) {\n  var key = _ref[0],\n      fn = _ref[1];\n  defineLazyProperty(Html5.prototype, key, function () {\n    return Html5[fn]();\n  }, true);\n});\nHtml5.prototype.featuresVolumeControl = Html5.canControlVolume();\n/**\n * Boolean indicating whether the `HTML5` tech currently supports the media element\n * moving in the DOM. iOS breaks if you move the media element, so this is set this to\n * false there. Everywhere else this should be true.\n *\n * @type {boolean}\n * @default\n */\n\nHtml5.prototype.movingMediaElementInDOM = !IS_IOS; // TODO: Previous comment: No longer appears to be used. Can probably be removed.\n//       Is this true?\n\n/**\n * Boolean indicating whether the `HTML5` tech currently supports automatic media resize\n * when going into fullscreen.\n *\n * @type {boolean}\n * @default\n */\n\nHtml5.prototype.featuresFullscreenResize = true;\n/**\n * Boolean indicating whether the `HTML5` tech currently supports the progress event.\n * If this is false, manual `progress` events will be triggered instead.\n *\n * @type {boolean}\n * @default\n */\n\nHtml5.prototype.featuresProgressEvents = true;\n/**\n * Boolean indicating whether the `HTML5` tech currently supports the timeupdate event.\n * If this is false, manual `timeupdate` events will be triggered instead.\n *\n * @default\n */\n\nHtml5.prototype.featuresTimeupdateEvents = true; // HTML5 Feature detection and Device Fixes --------------------------------- //\n\nvar canPlayType;\n\nHtml5.patchCanPlayType = function () {\n  // Android 4.0 and above can play HLS to some extent but it reports being unable to do so\n  // Firefox and Chrome report correctly\n  if (ANDROID_VERSION >= 4.0 && !IS_FIREFOX && !IS_CHROME) {\n    canPlayType = Html5.TEST_VID && Html5.TEST_VID.constructor.prototype.canPlayType;\n\n    Html5.TEST_VID.constructor.prototype.canPlayType = function (type) {\n      var mpegurlRE = /^application\\/(?:x-|vnd\\.apple\\.)mpegurl/i;\n\n      if (type && mpegurlRE.test(type)) {\n        return 'maybe';\n      }\n\n      return canPlayType.call(this, type);\n    };\n  }\n};\n\nHtml5.unpatchCanPlayType = function () {\n  var r = Html5.TEST_VID.constructor.prototype.canPlayType;\n\n  if (canPlayType) {\n    Html5.TEST_VID.constructor.prototype.canPlayType = canPlayType;\n  }\n\n  return r;\n}; // by default, patch the media element\n\n\nHtml5.patchCanPlayType();\n\nHtml5.disposeMediaElement = function (el) {\n  if (!el) {\n    return;\n  }\n\n  if (el.parentNode) {\n    el.parentNode.removeChild(el);\n  } // remove any child track or source nodes to prevent their loading\n\n\n  while (el.hasChildNodes()) {\n    el.removeChild(el.firstChild);\n  } // remove any src reference. not setting `src=''` because that causes a warning\n  // in firefox\n\n\n  el.removeAttribute('src'); // force the media element to update its loading state by calling load()\n  // however IE on Windows 7N has a bug that throws an error so need a try/catch (#793)\n\n  if (typeof el.load === 'function') {\n    // wrapping in an iife so it's not deoptimized (#1060#discussion_r10324473)\n    (function () {\n      try {\n        el.load();\n      } catch (e) {// not supported\n      }\n    })();\n  }\n};\n\nHtml5.resetMediaElement = function (el) {\n  if (!el) {\n    return;\n  }\n\n  var sources = el.querySelectorAll('source');\n  var i = sources.length;\n\n  while (i--) {\n    el.removeChild(sources[i]);\n  } // remove any src reference.\n  // not setting `src=''` because that throws an error\n\n\n  el.removeAttribute('src');\n\n  if (typeof el.load === 'function') {\n    // wrapping in an iife so it's not deoptimized (#1060#discussion_r10324473)\n    (function () {\n      try {\n        el.load();\n      } catch (e) {// satisfy linter\n      }\n    })();\n  }\n};\n/* Native HTML5 element property wrapping ----------------------------------- */\n// Wrap native boolean attributes with getters that check both property and attribute\n// The list is as followed:\n// muted, defaultMuted, autoplay, controls, loop, playsinline\n\n\n[\n/**\n * Get the value of `muted` from the media element. `muted` indicates\n * that the volume for the media should be set to silent. This does not actually change\n * the `volume` attribute.\n *\n * @method Html5#muted\n * @return {boolean}\n *         - True if the value of `volume` should be ignored and the audio set to silent.\n *         - False if the value of `volume` should be used.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-muted}\n */\n'muted',\n/**\n * Get the value of `defaultMuted` from the media element. `defaultMuted` indicates\n * whether the media should start muted or not. Only changes the default state of the\n * media. `muted` and `defaultMuted` can have different values. {@link Html5#muted} indicates the\n * current state.\n *\n * @method Html5#defaultMuted\n * @return {boolean}\n *         - The value of `defaultMuted` from the media element.\n *         - True indicates that the media should start muted.\n *         - False indicates that the media should not start muted\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-defaultmuted}\n */\n'defaultMuted',\n/**\n * Get the value of `autoplay` from the media element. `autoplay` indicates\n * that the media should start to play as soon as the page is ready.\n *\n * @method Html5#autoplay\n * @return {boolean}\n *         - The value of `autoplay` from the media element.\n *         - True indicates that the media should start as soon as the page loads.\n *         - False indicates that the media should not start as soon as the page loads.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-autoplay}\n */\n'autoplay',\n/**\n * Get the value of `controls` from the media element. `controls` indicates\n * whether the native media controls should be shown or hidden.\n *\n * @method Html5#controls\n * @return {boolean}\n *         - The value of `controls` from the media element.\n *         - True indicates that native controls should be showing.\n *         - False indicates that native controls should be hidden.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-controls}\n */\n'controls',\n/**\n * Get the value of `loop` from the media element. `loop` indicates\n * that the media should return to the start of the media and continue playing once\n * it reaches the end.\n *\n * @method Html5#loop\n * @return {boolean}\n *         - The value of `loop` from the media element.\n *         - True indicates that playback should seek back to start once\n *           the end of a media is reached.\n *         - False indicates that playback should not loop back to the start when the\n *           end of the media is reached.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-loop}\n */\n'loop',\n/**\n * Get the value of `playsinline` from the media element. `playsinline` indicates\n * to the browser that non-fullscreen playback is preferred when fullscreen\n * playback is the native default, such as in iOS Safari.\n *\n * @method Html5#playsinline\n * @return {boolean}\n *         - The value of `playsinline` from the media element.\n *         - True indicates that the media should play inline.\n *         - False indicates that the media should not play inline.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/#attr-video-playsinline}\n */\n'playsinline'].forEach(function (prop) {\n  Html5.prototype[prop] = function () {\n    return this.el_[prop] || this.el_.hasAttribute(prop);\n  };\n}); // Wrap native boolean attributes with setters that set both property and attribute\n// The list is as followed:\n// setMuted, setDefaultMuted, setAutoplay, setLoop, setPlaysinline\n// setControls is special-cased above\n\n[\n/**\n * Set the value of `muted` on the media element. `muted` indicates that the current\n * audio level should be silent.\n *\n * @method Html5#setMuted\n * @param {boolean} muted\n *        - True if the audio should be set to silent\n *        - False otherwise\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-muted}\n */\n'muted',\n/**\n * Set the value of `defaultMuted` on the media element. `defaultMuted` indicates that the current\n * audio level should be silent, but will only effect the muted level on initial playback..\n *\n * @method Html5.prototype.setDefaultMuted\n * @param {boolean} defaultMuted\n *        - True if the audio should be set to silent\n *        - False otherwise\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-defaultmuted}\n */\n'defaultMuted',\n/**\n * Set the value of `autoplay` on the media element. `autoplay` indicates\n * that the media should start to play as soon as the page is ready.\n *\n * @method Html5#setAutoplay\n * @param {boolean} autoplay\n *         - True indicates that the media should start as soon as the page loads.\n *         - False indicates that the media should not start as soon as the page loads.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-autoplay}\n */\n'autoplay',\n/**\n * Set the value of `loop` on the media element. `loop` indicates\n * that the media should return to the start of the media and continue playing once\n * it reaches the end.\n *\n * @method Html5#setLoop\n * @param {boolean} loop\n *         - True indicates that playback should seek back to start once\n *           the end of a media is reached.\n *         - False indicates that playback should not loop back to the start when the\n *           end of the media is reached.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-loop}\n */\n'loop',\n/**\n * Set the value of `playsinline` from the media element. `playsinline` indicates\n * to the browser that non-fullscreen playback is preferred when fullscreen\n * playback is the native default, such as in iOS Safari.\n *\n * @method Html5#setPlaysinline\n * @param {boolean} playsinline\n *         - True indicates that the media should play inline.\n *         - False indicates that the media should not play inline.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/#attr-video-playsinline}\n */\n'playsinline'].forEach(function (prop) {\n  Html5.prototype['set' + toTitleCase$1(prop)] = function (v) {\n    this.el_[prop] = v;\n\n    if (v) {\n      this.el_.setAttribute(prop, prop);\n    } else {\n      this.el_.removeAttribute(prop);\n    }\n  };\n}); // Wrap native properties with a getter\n// The list is as followed\n// paused, currentTime, buffered, volume, poster, preload, error, seeking\n// seekable, ended, playbackRate, defaultPlaybackRate, disablePictureInPicture\n// played, networkState, readyState, videoWidth, videoHeight, crossOrigin\n\n[\n/**\n * Get the value of `paused` from the media element. `paused` indicates whether the media element\n * is currently paused or not.\n *\n * @method Html5#paused\n * @return {boolean}\n *         The value of `paused` from the media element.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-paused}\n */\n'paused',\n/**\n * Get the value of `currentTime` from the media element. `currentTime` indicates\n * the current second that the media is at in playback.\n *\n * @method Html5#currentTime\n * @return {number}\n *         The value of `currentTime` from the media element.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-currenttime}\n */\n'currentTime',\n/**\n * Get the value of `buffered` from the media element. `buffered` is a `TimeRange`\n * object that represents the parts of the media that are already downloaded and\n * available for playback.\n *\n * @method Html5#buffered\n * @return {TimeRange}\n *         The value of `buffered` from the media element.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-buffered}\n */\n'buffered',\n/**\n * Get the value of `volume` from the media element. `volume` indicates\n * the current playback volume of audio for a media. `volume` will be a value from 0\n * (silent) to 1 (loudest and default).\n *\n * @method Html5#volume\n * @return {number}\n *         The value of `volume` from the media element. Value will be between 0-1.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-a-volume}\n */\n'volume',\n/**\n * Get the value of `poster` from the media element. `poster` indicates\n * that the url of an image file that can/will be shown when no media data is available.\n *\n * @method Html5#poster\n * @return {string}\n *         The value of `poster` from the media element. Value will be a url to an\n *         image.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-video-poster}\n */\n'poster',\n/**\n * Get the value of `preload` from the media element. `preload` indicates\n * what should download before the media is interacted with. It can have the following\n * values:\n * - none: nothing should be downloaded\n * - metadata: poster and the first few frames of the media may be downloaded to get\n *   media dimensions and other metadata\n * - auto: allow the media and metadata for the media to be downloaded before\n *    interaction\n *\n * @method Html5#preload\n * @return {string}\n *         The value of `preload` from the media element. Will be 'none', 'metadata',\n *         or 'auto'.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-preload}\n */\n'preload',\n/**\n * Get the value of the `error` from the media element. `error` indicates any\n * MediaError that may have occurred during playback. If error returns null there is no\n * current error.\n *\n * @method Html5#error\n * @return {MediaError|null}\n *         The value of `error` from the media element. Will be `MediaError` if there\n *         is a current error and null otherwise.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-error}\n */\n'error',\n/**\n * Get the value of `seeking` from the media element. `seeking` indicates whether the\n * media is currently seeking to a new position or not.\n *\n * @method Html5#seeking\n * @return {boolean}\n *         - The value of `seeking` from the media element.\n *         - True indicates that the media is currently seeking to a new position.\n *         - False indicates that the media is not seeking to a new position at this time.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-seeking}\n */\n'seeking',\n/**\n * Get the value of `seekable` from the media element. `seekable` returns a\n * `TimeRange` object indicating ranges of time that can currently be `seeked` to.\n *\n * @method Html5#seekable\n * @return {TimeRange}\n *         The value of `seekable` from the media element. A `TimeRange` object\n *         indicating the current ranges of time that can be seeked to.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-seekable}\n */\n'seekable',\n/**\n * Get the value of `ended` from the media element. `ended` indicates whether\n * the media has reached the end or not.\n *\n * @method Html5#ended\n * @return {boolean}\n *         - The value of `ended` from the media element.\n *         - True indicates that the media has ended.\n *         - False indicates that the media has not ended.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-ended}\n */\n'ended',\n/**\n * Get the value of `playbackRate` from the media element. `playbackRate` indicates\n * the rate at which the media is currently playing back. Examples:\n *   - if playbackRate is set to 2, media will play twice as fast.\n *   - if playbackRate is set to 0.5, media will play half as fast.\n *\n * @method Html5#playbackRate\n * @return {number}\n *         The value of `playbackRate` from the media element. A number indicating\n *         the current playback speed of the media, where 1 is normal speed.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-playbackrate}\n */\n'playbackRate',\n/**\n * Get the value of `defaultPlaybackRate` from the media element. `defaultPlaybackRate` indicates\n * the rate at which the media is currently playing back. This value will not indicate the current\n * `playbackRate` after playback has started, use {@link Html5#playbackRate} for that.\n *\n * Examples:\n *   - if defaultPlaybackRate is set to 2, media will play twice as fast.\n *   - if defaultPlaybackRate is set to 0.5, media will play half as fast.\n *\n * @method Html5.prototype.defaultPlaybackRate\n * @return {number}\n *         The value of `defaultPlaybackRate` from the media element. A number indicating\n *         the current playback speed of the media, where 1 is normal speed.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-playbackrate}\n */\n'defaultPlaybackRate',\n/**\n * Get the value of 'disablePictureInPicture' from the video element.\n *\n * @method Html5#disablePictureInPicture\n * @return {boolean} value\n *         - The value of `disablePictureInPicture` from the video element.\n *         - True indicates that the video can't be played in Picture-In-Picture mode\n *         - False indicates that the video can be played in Picture-In-Picture mode\n *\n * @see [Spec]{@link https://w3c.github.io/picture-in-picture/#disable-pip}\n */\n'disablePictureInPicture',\n/**\n * Get the value of `played` from the media element. `played` returns a `TimeRange`\n * object representing points in the media timeline that have been played.\n *\n * @method Html5#played\n * @return {TimeRange}\n *         The value of `played` from the media element. A `TimeRange` object indicating\n *         the ranges of time that have been played.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-played}\n */\n'played',\n/**\n * Get the value of `networkState` from the media element. `networkState` indicates\n * the current network state. It returns an enumeration from the following list:\n * - 0: NETWORK_EMPTY\n * - 1: NETWORK_IDLE\n * - 2: NETWORK_LOADING\n * - 3: NETWORK_NO_SOURCE\n *\n * @method Html5#networkState\n * @return {number}\n *         The value of `networkState` from the media element. This will be a number\n *         from the list in the description.\n *\n * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-networkstate}\n */\n'networkState',\n/**\n * Get the value of `readyState` from the media element. `readyState` indicates\n * the current state of the media element. It returns an enumeration from the\n * following list:\n * - 0: HAVE_NOTHING\n * - 1: HAVE_METADATA\n * - 2: HAVE_CURRENT_DATA\n * - 3: HAVE_FUTURE_DATA\n * - 4: HAVE_ENOUGH_DATA\n *\n * @method Html5#readyState\n * @return {number}\n *         The value of `readyState` from the media element. This will be a number\n *         from the list in the description.\n *\n * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#ready-states}\n */\n'readyState',\n/**\n * Get the value of `videoWidth` from the video element. `videoWidth` indicates\n * the current width of the video in css pixels.\n *\n * @method Html5#videoWidth\n * @return {number}\n *         The value of `videoWidth` from the video element. This will be a number\n *         in css pixels.\n *\n * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-video-videowidth}\n */\n'videoWidth',\n/**\n * Get the value of `videoHeight` from the video element. `videoHeight` indicates\n * the current height of the video in css pixels.\n *\n * @method Html5#videoHeight\n * @return {number}\n *         The value of `videoHeight` from the video element. This will be a number\n *         in css pixels.\n *\n * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-video-videowidth}\n */\n'videoHeight',\n/**\n * Get the value of `crossOrigin` from the media element. `crossOrigin` indicates\n * to the browser that should sent the cookies along with the requests for the\n * different assets/playlists\n *\n * @method Html5#crossOrigin\n * @return {string}\n *         - anonymous indicates that the media should not sent cookies.\n *         - use-credentials indicates that the media should sent cookies along the requests.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/#attr-media-crossorigin}\n */\n'crossOrigin'].forEach(function (prop) {\n  Html5.prototype[prop] = function () {\n    return this.el_[prop];\n  };\n}); // Wrap native properties with a setter in this format:\n// set + toTitleCase(name)\n// The list is as follows:\n// setVolume, setSrc, setPoster, setPreload, setPlaybackRate, setDefaultPlaybackRate,\n// setDisablePictureInPicture, setCrossOrigin\n\n[\n/**\n * Set the value of `volume` on the media element. `volume` indicates the current\n * audio level as a percentage in decimal form. This means that 1 is 100%, 0.5 is 50%, and\n * so on.\n *\n * @method Html5#setVolume\n * @param {number} percentAsDecimal\n *        The volume percent as a decimal. Valid range is from 0-1.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-a-volume}\n */\n'volume',\n/**\n * Set the value of `src` on the media element. `src` indicates the current\n * {@link Tech~SourceObject} for the media.\n *\n * @method Html5#setSrc\n * @param {Tech~SourceObject} src\n *        The source object to set as the current source.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-src}\n */\n'src',\n/**\n * Set the value of `poster` on the media element. `poster` is the url to\n * an image file that can/will be shown when no media data is available.\n *\n * @method Html5#setPoster\n * @param {string} poster\n *        The url to an image that should be used as the `poster` for the media\n *        element.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-poster}\n */\n'poster',\n/**\n * Set the value of `preload` on the media element. `preload` indicates\n * what should download before the media is interacted with. It can have the following\n * values:\n * - none: nothing should be downloaded\n * - metadata: poster and the first few frames of the media may be downloaded to get\n *   media dimensions and other metadata\n * - auto: allow the media and metadata for the media to be downloaded before\n *    interaction\n *\n * @method Html5#setPreload\n * @param {string} preload\n *         The value of `preload` to set on the media element. Must be 'none', 'metadata',\n *         or 'auto'.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-preload}\n */\n'preload',\n/**\n * Set the value of `playbackRate` on the media element. `playbackRate` indicates\n * the rate at which the media should play back. Examples:\n *   - if playbackRate is set to 2, media will play twice as fast.\n *   - if playbackRate is set to 0.5, media will play half as fast.\n *\n * @method Html5#setPlaybackRate\n * @return {number}\n *         The value of `playbackRate` from the media element. A number indicating\n *         the current playback speed of the media, where 1 is normal speed.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-playbackrate}\n */\n'playbackRate',\n/**\n * Set the value of `defaultPlaybackRate` on the media element. `defaultPlaybackRate` indicates\n * the rate at which the media should play back upon initial startup. Changing this value\n * after a video has started will do nothing. Instead you should used {@link Html5#setPlaybackRate}.\n *\n * Example Values:\n *   - if playbackRate is set to 2, media will play twice as fast.\n *   - if playbackRate is set to 0.5, media will play half as fast.\n *\n * @method Html5.prototype.setDefaultPlaybackRate\n * @return {number}\n *         The value of `defaultPlaybackRate` from the media element. A number indicating\n *         the current playback speed of the media, where 1 is normal speed.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-defaultplaybackrate}\n */\n'defaultPlaybackRate',\n/**\n * Prevents the browser from suggesting a Picture-in-Picture context menu\n * or to request Picture-in-Picture automatically in some cases.\n *\n * @method Html5#setDisablePictureInPicture\n * @param {boolean} value\n *         The true value will disable Picture-in-Picture mode.\n *\n * @see [Spec]{@link https://w3c.github.io/picture-in-picture/#disable-pip}\n */\n'disablePictureInPicture',\n/**\n * Set the value of `crossOrigin` from the media element. `crossOrigin` indicates\n * to the browser that should sent the cookies along with the requests for the\n * different assets/playlists\n *\n * @method Html5#setCrossOrigin\n * @param {string} crossOrigin\n *         - anonymous indicates that the media should not sent cookies.\n *         - use-credentials indicates that the media should sent cookies along the requests.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/#attr-media-crossorigin}\n */\n'crossOrigin'].forEach(function (prop) {\n  Html5.prototype['set' + toTitleCase$1(prop)] = function (v) {\n    this.el_[prop] = v;\n  };\n}); // wrap native functions with a function\n// The list is as follows:\n// pause, load, play\n\n[\n/**\n * A wrapper around the media elements `pause` function. This will call the `HTML5`\n * media elements `pause` function.\n *\n * @method Html5#pause\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-pause}\n */\n'pause',\n/**\n * A wrapper around the media elements `load` function. This will call the `HTML5`s\n * media element `load` function.\n *\n * @method Html5#load\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-load}\n */\n'load',\n/**\n * A wrapper around the media elements `play` function. This will call the `HTML5`s\n * media element `play` function.\n *\n * @method Html5#play\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-play}\n */\n'play'].forEach(function (prop) {\n  Html5.prototype[prop] = function () {\n    return this.el_[prop]();\n  };\n});\nTech.withSourceHandlers(Html5);\n/**\n * Native source handler for Html5, simply passes the source to the media element.\n *\n * @property {Tech~SourceObject} source\n *        The source object\n *\n * @property {Html5} tech\n *        The instance of the HTML5 tech.\n */\n\nHtml5.nativeSourceHandler = {};\n/**\n * Check if the media element can play the given mime type.\n *\n * @param {string} type\n *        The mimetype to check\n *\n * @return {string}\n *         'probably', 'maybe', or '' (empty string)\n */\n\nHtml5.nativeSourceHandler.canPlayType = function (type) {\n  // IE without MediaPlayer throws an error (#519)\n  try {\n    return Html5.TEST_VID.canPlayType(type);\n  } catch (e) {\n    return '';\n  }\n};\n/**\n * Check if the media element can handle a source natively.\n *\n * @param {Tech~SourceObject} source\n *         The source object\n *\n * @param {Object} [options]\n *         Options to be passed to the tech.\n *\n * @return {string}\n *         'probably', 'maybe', or '' (empty string).\n */\n\n\nHtml5.nativeSourceHandler.canHandleSource = function (source, options) {\n  // If a type was provided we should rely on that\n  if (source.type) {\n    return Html5.nativeSourceHandler.canPlayType(source.type); // If no type, fall back to checking 'video/[EXTENSION]'\n  } else if (source.src) {\n    var ext = getFileExtension(source.src);\n    return Html5.nativeSourceHandler.canPlayType(\"video/\" + ext);\n  }\n\n  return '';\n};\n/**\n * Pass the source to the native media element.\n *\n * @param {Tech~SourceObject} source\n *        The source object\n *\n * @param {Html5} tech\n *        The instance of the Html5 tech\n *\n * @param {Object} [options]\n *        The options to pass to the source\n */\n\n\nHtml5.nativeSourceHandler.handleSource = function (source, tech, options) {\n  tech.setSrc(source.src);\n};\n/**\n * A noop for the native dispose function, as cleanup is not needed.\n */\n\n\nHtml5.nativeSourceHandler.dispose = function () {}; // Register the native source handler\n\n\nHtml5.registerSourceHandler(Html5.nativeSourceHandler);\nTech.registerTech('Html5', Html5);\n\n// on the player when they happen\n\nvar TECH_EVENTS_RETRIGGER = [\n/**\n * Fired while the user agent is downloading media data.\n *\n * @event Player#progress\n * @type {EventTarget~Event}\n */\n\n/**\n * Retrigger the `progress` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechProgress_\n * @fires Player#progress\n * @listens Tech#progress\n */\n'progress',\n/**\n * Fires when the loading of an audio/video is aborted.\n *\n * @event Player#abort\n * @type {EventTarget~Event}\n */\n\n/**\n * Retrigger the `abort` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechAbort_\n * @fires Player#abort\n * @listens Tech#abort\n */\n'abort',\n/**\n * Fires when the browser is intentionally not getting media data.\n *\n * @event Player#suspend\n * @type {EventTarget~Event}\n */\n\n/**\n * Retrigger the `suspend` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechSuspend_\n * @fires Player#suspend\n * @listens Tech#suspend\n */\n'suspend',\n/**\n * Fires when the current playlist is empty.\n *\n * @event Player#emptied\n * @type {EventTarget~Event}\n */\n\n/**\n * Retrigger the `emptied` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechEmptied_\n * @fires Player#emptied\n * @listens Tech#emptied\n */\n'emptied',\n/**\n * Fires when the browser is trying to get media data, but data is not available.\n *\n * @event Player#stalled\n * @type {EventTarget~Event}\n */\n\n/**\n * Retrigger the `stalled` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechStalled_\n * @fires Player#stalled\n * @listens Tech#stalled\n */\n'stalled',\n/**\n * Fires when the browser has loaded meta data for the audio/video.\n *\n * @event Player#loadedmetadata\n * @type {EventTarget~Event}\n */\n\n/**\n * Retrigger the `loadedmetadata` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechLoadedmetadata_\n * @fires Player#loadedmetadata\n * @listens Tech#loadedmetadata\n */\n'loadedmetadata',\n/**\n * Fires when the browser has loaded the current frame of the audio/video.\n *\n * @event Player#loadeddata\n * @type {event}\n */\n\n/**\n * Retrigger the `loadeddata` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechLoaddeddata_\n * @fires Player#loadeddata\n * @listens Tech#loadeddata\n */\n'loadeddata',\n/**\n * Fires when the current playback position has changed.\n *\n * @event Player#timeupdate\n * @type {event}\n */\n\n/**\n * Retrigger the `timeupdate` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechTimeUpdate_\n * @fires Player#timeupdate\n * @listens Tech#timeupdate\n */\n'timeupdate',\n/**\n * Fires when the video's intrinsic dimensions change\n *\n * @event Player#resize\n * @type {event}\n */\n\n/**\n * Retrigger the `resize` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechResize_\n * @fires Player#resize\n * @listens Tech#resize\n */\n'resize',\n/**\n * Fires when the volume has been changed\n *\n * @event Player#volumechange\n * @type {event}\n */\n\n/**\n * Retrigger the `volumechange` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechVolumechange_\n * @fires Player#volumechange\n * @listens Tech#volumechange\n */\n'volumechange',\n/**\n * Fires when the text track has been changed\n *\n * @event Player#texttrackchange\n * @type {event}\n */\n\n/**\n * Retrigger the `texttrackchange` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechTexttrackchange_\n * @fires Player#texttrackchange\n * @listens Tech#texttrackchange\n */\n'texttrackchange']; // events to queue when playback rate is zero\n// this is a hash for the sole purpose of mapping non-camel-cased event names\n// to camel-cased function names\n\nvar TECH_EVENTS_QUEUE = {\n  canplay: 'CanPlay',\n  canplaythrough: 'CanPlayThrough',\n  playing: 'Playing',\n  seeked: 'Seeked'\n};\nvar BREAKPOINT_ORDER = ['tiny', 'xsmall', 'small', 'medium', 'large', 'xlarge', 'huge'];\nvar BREAKPOINT_CLASSES = {}; // grep: vjs-layout-tiny\n// grep: vjs-layout-x-small\n// grep: vjs-layout-small\n// grep: vjs-layout-medium\n// grep: vjs-layout-large\n// grep: vjs-layout-x-large\n// grep: vjs-layout-huge\n\nBREAKPOINT_ORDER.forEach(function (k) {\n  var v = k.charAt(0) === 'x' ? \"x-\" + k.substring(1) : k;\n  BREAKPOINT_CLASSES[k] = \"vjs-layout-\" + v;\n});\nvar DEFAULT_BREAKPOINTS = {\n  tiny: 210,\n  xsmall: 320,\n  small: 425,\n  medium: 768,\n  large: 1440,\n  xlarge: 2560,\n  huge: Infinity\n};\n/**\n * An instance of the `Player` class is created when any of the Video.js setup methods\n * are used to initialize a video.\n *\n * After an instance has been created it can be accessed globally in two ways:\n * 1. By calling `videojs('example_video_1');`\n * 2. By using it directly via  `videojs.players.example_video_1;`\n *\n * @extends Component\n */\n\nvar Player = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(Player, _Component);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Element} tag\n   *        The original video DOM element used for configuring options.\n   *\n   * @param {Object} [options]\n   *        Object of option names and values.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        Ready callback function.\n   */\n  function Player(tag, options, ready) {\n    var _this;\n\n    // Make sure tag ID exists\n    tag.id = tag.id || options.id || \"vjs_video_\" + newGUID(); // Set Options\n    // The options argument overrides options set in the video tag\n    // which overrides globally set options.\n    // This latter part coincides with the load order\n    // (tag must exist before Player)\n\n    options = assign(Player.getTagSettings(tag), options); // Delay the initialization of children because we need to set up\n    // player properties first, and can't use `this` before `super()`\n\n    options.initChildren = false; // Same with creating the element\n\n    options.createEl = false; // don't auto mixin the evented mixin\n\n    options.evented = false; // we don't want the player to report touch activity on itself\n    // see enableTouchActivity in Component\n\n    options.reportTouchActivity = false; // If language is not set, get the closest lang attribute\n\n    if (!options.language) {\n      if (typeof tag.closest === 'function') {\n        var closest = tag.closest('[lang]');\n\n        if (closest && closest.getAttribute) {\n          options.language = closest.getAttribute('lang');\n        }\n      } else {\n        var element = tag;\n\n        while (element && element.nodeType === 1) {\n          if (getAttributes(element).hasOwnProperty('lang')) {\n            options.language = element.getAttribute('lang');\n            break;\n          }\n\n          element = element.parentNode;\n        }\n      }\n    } // Run base component initializing with new options\n\n\n    _this = _Component.call(this, null, options, ready) || this; // Create bound methods for document listeners.\n\n    _this.boundDocumentFullscreenChange_ = function (e) {\n      return _this.documentFullscreenChange_(e);\n    };\n\n    _this.boundFullWindowOnEscKey_ = function (e) {\n      return _this.fullWindowOnEscKey(e);\n    };\n\n    _this.boundUpdateStyleEl_ = function (e) {\n      return _this.updateStyleEl_(e);\n    };\n\n    _this.boundApplyInitTime_ = function (e) {\n      return _this.applyInitTime_(e);\n    };\n\n    _this.boundUpdateCurrentBreakpoint_ = function (e) {\n      return _this.updateCurrentBreakpoint_(e);\n    };\n\n    _this.boundHandleTechClick_ = function (e) {\n      return _this.handleTechClick_(e);\n    };\n\n    _this.boundHandleTechDoubleClick_ = function (e) {\n      return _this.handleTechDoubleClick_(e);\n    };\n\n    _this.boundHandleTechTouchStart_ = function (e) {\n      return _this.handleTechTouchStart_(e);\n    };\n\n    _this.boundHandleTechTouchMove_ = function (e) {\n      return _this.handleTechTouchMove_(e);\n    };\n\n    _this.boundHandleTechTouchEnd_ = function (e) {\n      return _this.handleTechTouchEnd_(e);\n    };\n\n    _this.boundHandleTechTap_ = function (e) {\n      return _this.handleTechTap_(e);\n    }; // default isFullscreen_ to false\n\n\n    _this.isFullscreen_ = false; // create logger\n\n    _this.log = createLogger(_this.id_); // Hold our own reference to fullscreen api so it can be mocked in tests\n\n    _this.fsApi_ = FullscreenApi; // Tracks when a tech changes the poster\n\n    _this.isPosterFromTech_ = false; // Holds callback info that gets queued when playback rate is zero\n    // and a seek is happening\n\n    _this.queuedCallbacks_ = []; // Turn off API access because we're loading a new tech that might load asynchronously\n\n    _this.isReady_ = false; // Init state hasStarted_\n\n    _this.hasStarted_ = false; // Init state userActive_\n\n    _this.userActive_ = false; // Init debugEnabled_\n\n    _this.debugEnabled_ = false; // if the global option object was accidentally blown away by\n    // someone, bail early with an informative error\n\n    if (!_this.options_ || !_this.options_.techOrder || !_this.options_.techOrder.length) {\n      throw new Error('No techOrder specified. Did you overwrite ' + 'videojs.options instead of just changing the ' + 'properties you want to override?');\n    } // Store the original tag used to set options\n\n\n    _this.tag = tag; // Store the tag attributes used to restore html5 element\n\n    _this.tagAttributes = tag && getAttributes(tag); // Update current language\n\n    _this.language(_this.options_.language); // Update Supported Languages\n\n\n    if (options.languages) {\n      // Normalise player option languages to lowercase\n      var languagesToLower = {};\n      Object.getOwnPropertyNames(options.languages).forEach(function (name) {\n        languagesToLower[name.toLowerCase()] = options.languages[name];\n      });\n      _this.languages_ = languagesToLower;\n    } else {\n      _this.languages_ = Player.prototype.options_.languages;\n    }\n\n    _this.resetCache_(); // Set poster\n\n\n    _this.poster_ = options.poster || ''; // Set controls\n\n    _this.controls_ = !!options.controls; // Original tag settings stored in options\n    // now remove immediately so native controls don't flash.\n    // May be turned back on by HTML5 tech if nativeControlsForTouch is true\n\n    tag.controls = false;\n    tag.removeAttribute('controls');\n    _this.changingSrc_ = false;\n    _this.playCallbacks_ = [];\n    _this.playTerminatedQueue_ = []; // the attribute overrides the option\n\n    if (tag.hasAttribute('autoplay')) {\n      _this.autoplay(true);\n    } else {\n      // otherwise use the setter to validate and\n      // set the correct value.\n      _this.autoplay(_this.options_.autoplay);\n    } // check plugins\n\n\n    if (options.plugins) {\n      Object.keys(options.plugins).forEach(function (name) {\n        if (typeof _this[name] !== 'function') {\n          throw new Error(\"plugin \\\"\" + name + \"\\\" does not exist\");\n        }\n      });\n    }\n    /*\n     * Store the internal state of scrubbing\n     *\n     * @private\n     * @return {Boolean} True if the user is scrubbing\n     */\n\n\n    _this.scrubbing_ = false;\n    _this.el_ = _this.createEl(); // Make this an evented object and use `el_` as its event bus.\n\n    evented(_assertThisInitialized(_this), {\n      eventBusKey: 'el_'\n    }); // listen to document and player fullscreenchange handlers so we receive those events\n    // before a user can receive them so we can update isFullscreen appropriately.\n    // make sure that we listen to fullscreenchange events before everything else to make sure that\n    // our isFullscreen method is updated properly for internal components as well as external.\n\n    if (_this.fsApi_.requestFullscreen) {\n      on(document, _this.fsApi_.fullscreenchange, _this.boundDocumentFullscreenChange_);\n\n      _this.on(_this.fsApi_.fullscreenchange, _this.boundDocumentFullscreenChange_);\n    }\n\n    if (_this.fluid_) {\n      _this.on(['playerreset', 'resize'], _this.boundUpdateStyleEl_);\n    } // We also want to pass the original player options to each component and plugin\n    // as well so they don't need to reach back into the player for options later.\n    // We also need to do another copy of this.options_ so we don't end up with\n    // an infinite loop.\n\n\n    var playerOptionsCopy = mergeOptions$3(_this.options_); // Load plugins\n\n    if (options.plugins) {\n      Object.keys(options.plugins).forEach(function (name) {\n        _this[name](options.plugins[name]);\n      });\n    } // Enable debug mode to fire debugon event for all plugins.\n\n\n    if (options.debug) {\n      _this.debug(true);\n    }\n\n    _this.options_.playerOptions = playerOptionsCopy;\n    _this.middleware_ = [];\n\n    _this.playbackRates(options.playbackRates);\n\n    _this.initChildren(); // Set isAudio based on whether or not an audio tag was used\n\n\n    _this.isAudio(tag.nodeName.toLowerCase() === 'audio'); // Update controls className. Can't do this when the controls are initially\n    // set because the element doesn't exist yet.\n\n\n    if (_this.controls()) {\n      _this.addClass('vjs-controls-enabled');\n    } else {\n      _this.addClass('vjs-controls-disabled');\n    } // Set ARIA label and region role depending on player type\n\n\n    _this.el_.setAttribute('role', 'region');\n\n    if (_this.isAudio()) {\n      _this.el_.setAttribute('aria-label', _this.localize('Audio Player'));\n    } else {\n      _this.el_.setAttribute('aria-label', _this.localize('Video Player'));\n    }\n\n    if (_this.isAudio()) {\n      _this.addClass('vjs-audio');\n    }\n\n    if (_this.flexNotSupported_()) {\n      _this.addClass('vjs-no-flex');\n    } // TODO: Make this smarter. Toggle user state between touching/mousing\n    // using events, since devices can have both touch and mouse events.\n    // TODO: Make this check be performed again when the window switches between monitors\n    // (See https://github.com/videojs/video.js/issues/5683)\n\n\n    if (TOUCH_ENABLED) {\n      _this.addClass('vjs-touch-enabled');\n    } // iOS Safari has broken hover handling\n\n\n    if (!IS_IOS) {\n      _this.addClass('vjs-workinghover');\n    } // Make player easily findable by ID\n\n\n    Player.players[_this.id_] = _assertThisInitialized(_this); // Add a major version class to aid css in plugins\n\n    var majorVersion = version$5.split('.')[0];\n\n    _this.addClass(\"vjs-v\" + majorVersion); // When the player is first initialized, trigger activity so components\n    // like the control bar show themselves if needed\n\n\n    _this.userActive(true);\n\n    _this.reportUserActivity();\n\n    _this.one('play', function (e) {\n      return _this.listenForUserActivity_(e);\n    });\n\n    _this.on('stageclick', function (e) {\n      return _this.handleStageClick_(e);\n    });\n\n    _this.on('keydown', function (e) {\n      return _this.handleKeyDown(e);\n    });\n\n    _this.on('languagechange', function (e) {\n      return _this.handleLanguagechange(e);\n    });\n\n    _this.breakpoints(_this.options_.breakpoints);\n\n    _this.responsive(_this.options_.responsive);\n\n    return _this;\n  }\n  /**\n   * Destroys the video player and does any necessary cleanup.\n   *\n   * This is especially helpful if you are dynamically adding and removing videos\n   * to/from the DOM.\n   *\n   * @fires Player#dispose\n   */\n\n\n  var _proto = Player.prototype;\n\n  _proto.dispose = function dispose() {\n    var _this2 = this;\n\n    /**\n     * Called when the player is being disposed of.\n     *\n     * @event Player#dispose\n     * @type {EventTarget~Event}\n     */\n    this.trigger('dispose'); // prevent dispose from being called twice\n\n    this.off('dispose'); // Make sure all player-specific document listeners are unbound. This is\n\n    off(document, this.fsApi_.fullscreenchange, this.boundDocumentFullscreenChange_);\n    off(document, 'keydown', this.boundFullWindowOnEscKey_);\n\n    if (this.styleEl_ && this.styleEl_.parentNode) {\n      this.styleEl_.parentNode.removeChild(this.styleEl_);\n      this.styleEl_ = null;\n    } // Kill reference to this player\n\n\n    Player.players[this.id_] = null;\n\n    if (this.tag && this.tag.player) {\n      this.tag.player = null;\n    }\n\n    if (this.el_ && this.el_.player) {\n      this.el_.player = null;\n    }\n\n    if (this.tech_) {\n      this.tech_.dispose();\n      this.isPosterFromTech_ = false;\n      this.poster_ = '';\n    }\n\n    if (this.playerElIngest_) {\n      this.playerElIngest_ = null;\n    }\n\n    if (this.tag) {\n      this.tag = null;\n    }\n\n    clearCacheForPlayer(this); // remove all event handlers for track lists\n    // all tracks and track listeners are removed on\n    // tech dispose\n\n    ALL.names.forEach(function (name) {\n      var props = ALL[name];\n\n      var list = _this2[props.getterName](); // if it is not a native list\n      // we have to manually remove event listeners\n\n\n      if (list && list.off) {\n        list.off();\n      }\n    }); // the actual .el_ is removed here\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Create the `Player`'s DOM element.\n   *\n   * @return {Element}\n   *         The DOM element that gets created.\n   */\n  ;\n\n  _proto.createEl = function createEl() {\n    var tag = this.tag;\n    var el;\n    var playerElIngest = this.playerElIngest_ = tag.parentNode && tag.parentNode.hasAttribute && tag.parentNode.hasAttribute('data-vjs-player');\n    var divEmbed = this.tag.tagName.toLowerCase() === 'video-js';\n\n    if (playerElIngest) {\n      el = this.el_ = tag.parentNode;\n    } else if (!divEmbed) {\n      el = this.el_ = _Component.prototype.createEl.call(this, 'div');\n    } // Copy over all the attributes from the tag, including ID and class\n    // ID will now reference player box, not the video tag\n\n\n    var attrs = getAttributes(tag);\n\n    if (divEmbed) {\n      el = this.el_ = tag;\n      tag = this.tag = document.createElement('video');\n\n      while (el.children.length) {\n        tag.appendChild(el.firstChild);\n      }\n\n      if (!hasClass(el, 'video-js')) {\n        addClass(el, 'video-js');\n      }\n\n      el.appendChild(tag);\n      playerElIngest = this.playerElIngest_ = el; // move properties over from our custom `video-js` element\n      // to our new `video` element. This will move things like\n      // `src` or `controls` that were set via js before the player\n      // was initialized.\n\n      Object.keys(el).forEach(function (k) {\n        try {\n          tag[k] = el[k];\n        } catch (e) {// we got a a property like outerHTML which we can't actually copy, ignore it\n        }\n      });\n    } // set tabindex to -1 to remove the video element from the focus order\n\n\n    tag.setAttribute('tabindex', '-1');\n    attrs.tabindex = '-1'; // Workaround for #4583 (JAWS+IE doesn't announce BPB or play button), and\n    // for the same issue with Chrome (on Windows) with JAWS.\n    // See https://github.com/FreedomScientific/VFO-standards-support/issues/78\n    // Note that we can't detect if JAWS is being used, but this ARIA attribute\n    //  doesn't change behavior of IE11 or Chrome if JAWS is not being used\n\n    if (IE_VERSION || IS_CHROME && IS_WINDOWS) {\n      tag.setAttribute('role', 'application');\n      attrs.role = 'application';\n    } // Remove width/height attrs from tag so CSS can make it 100% width/height\n\n\n    tag.removeAttribute('width');\n    tag.removeAttribute('height');\n\n    if ('width' in attrs) {\n      delete attrs.width;\n    }\n\n    if ('height' in attrs) {\n      delete attrs.height;\n    }\n\n    Object.getOwnPropertyNames(attrs).forEach(function (attr) {\n      // don't copy over the class attribute to the player element when we're in a div embed\n      // the class is already set up properly in the divEmbed case\n      // and we want to make sure that the `video-js` class doesn't get lost\n      if (!(divEmbed && attr === 'class')) {\n        el.setAttribute(attr, attrs[attr]);\n      }\n\n      if (divEmbed) {\n        tag.setAttribute(attr, attrs[attr]);\n      }\n    }); // Update tag id/class for use as HTML5 playback tech\n    // Might think we should do this after embedding in container so .vjs-tech class\n    // doesn't flash 100% width/height, but class only applies with .video-js parent\n\n    tag.playerId = tag.id;\n    tag.id += '_html5_api';\n    tag.className = 'vjs-tech'; // Make player findable on elements\n\n    tag.player = el.player = this; // Default state of video is paused\n\n    this.addClass('vjs-paused'); // Add a style element in the player that we'll use to set the width/height\n    // of the player in a way that's still overrideable by CSS, just like the\n    // video element\n\n    if (window$1.VIDEOJS_NO_DYNAMIC_STYLE !== true) {\n      this.styleEl_ = createStyleElement('vjs-styles-dimensions');\n      var defaultsStyleEl = $('.vjs-styles-defaults');\n      var head = $('head');\n      head.insertBefore(this.styleEl_, defaultsStyleEl ? defaultsStyleEl.nextSibling : head.firstChild);\n    }\n\n    this.fill_ = false;\n    this.fluid_ = false; // Pass in the width/height/aspectRatio options which will update the style el\n\n    this.width(this.options_.width);\n    this.height(this.options_.height);\n    this.fill(this.options_.fill);\n    this.fluid(this.options_.fluid);\n    this.aspectRatio(this.options_.aspectRatio); // support both crossOrigin and crossorigin to reduce confusion and issues around the name\n\n    this.crossOrigin(this.options_.crossOrigin || this.options_.crossorigin); // Hide any links within the video/audio tag,\n    // because IE doesn't hide them completely from screen readers.\n\n    var links = tag.getElementsByTagName('a');\n\n    for (var i = 0; i < links.length; i++) {\n      var linkEl = links.item(i);\n      addClass(linkEl, 'vjs-hidden');\n      linkEl.setAttribute('hidden', 'hidden');\n    } // insertElFirst seems to cause the networkState to flicker from 3 to 2, so\n    // keep track of the original for later so we can know if the source originally failed\n\n\n    tag.initNetworkState_ = tag.networkState; // Wrap video tag in div (el/box) container\n\n    if (tag.parentNode && !playerElIngest) {\n      tag.parentNode.insertBefore(el, tag);\n    } // insert the tag as the first child of the player element\n    // then manually add it to the children array so that this.addChild\n    // will work properly for other components\n    //\n    // Breaks iPhone, fixed in HTML5 setup.\n\n\n    prependTo(tag, el);\n    this.children_.unshift(tag); // Set lang attr on player to ensure CSS :lang() in consistent with player\n    // if it's been set to something different to the doc\n\n    this.el_.setAttribute('lang', this.language_);\n    this.el_.setAttribute('translate', 'no');\n    this.el_ = el;\n    return el;\n  }\n  /**\n   * Get or set the `Player`'s crossOrigin option. For the HTML5 player, this\n   * sets the `crossOrigin` property on the `<video>` tag to control the CORS\n   * behavior.\n   *\n   * @see [Video Element Attributes]{@link https://developer.mozilla.org/en-US/docs/Web/HTML/Element/video#attr-crossorigin}\n   *\n   * @param {string} [value]\n   *        The value to set the `Player`'s crossOrigin to. If an argument is\n   *        given, must be one of `anonymous` or `use-credentials`.\n   *\n   * @return {string|undefined}\n   *         - The current crossOrigin value of the `Player` when getting.\n   *         - undefined when setting\n   */\n  ;\n\n  _proto.crossOrigin = function crossOrigin(value) {\n    if (!value) {\n      return this.techGet_('crossOrigin');\n    }\n\n    if (value !== 'anonymous' && value !== 'use-credentials') {\n      log$1.warn(\"crossOrigin must be \\\"anonymous\\\" or \\\"use-credentials\\\", given \\\"\" + value + \"\\\"\");\n      return;\n    }\n\n    this.techCall_('setCrossOrigin', value);\n    return;\n  }\n  /**\n   * A getter/setter for the `Player`'s width. Returns the player's configured value.\n   * To get the current width use `currentWidth()`.\n   *\n   * @param {number} [value]\n   *        The value to set the `Player`'s width to.\n   *\n   * @return {number}\n   *         The current width of the `Player` when getting.\n   */\n  ;\n\n  _proto.width = function width(value) {\n    return this.dimension('width', value);\n  }\n  /**\n   * A getter/setter for the `Player`'s height. Returns the player's configured value.\n   * To get the current height use `currentheight()`.\n   *\n   * @param {number} [value]\n   *        The value to set the `Player`'s heigth to.\n   *\n   * @return {number}\n   *         The current height of the `Player` when getting.\n   */\n  ;\n\n  _proto.height = function height(value) {\n    return this.dimension('height', value);\n  }\n  /**\n   * A getter/setter for the `Player`'s width & height.\n   *\n   * @param {string} dimension\n   *        This string can be:\n   *        - 'width'\n   *        - 'height'\n   *\n   * @param {number} [value]\n   *        Value for dimension specified in the first argument.\n   *\n   * @return {number}\n   *         The dimension arguments value when getting (width/height).\n   */\n  ;\n\n  _proto.dimension = function dimension(_dimension, value) {\n    var privDimension = _dimension + '_';\n\n    if (value === undefined) {\n      return this[privDimension] || 0;\n    }\n\n    if (value === '' || value === 'auto') {\n      // If an empty string is given, reset the dimension to be automatic\n      this[privDimension] = undefined;\n      this.updateStyleEl_();\n      return;\n    }\n\n    var parsedVal = parseFloat(value);\n\n    if (isNaN(parsedVal)) {\n      log$1.error(\"Improper value \\\"\" + value + \"\\\" supplied for for \" + _dimension);\n      return;\n    }\n\n    this[privDimension] = parsedVal;\n    this.updateStyleEl_();\n  }\n  /**\n   * A getter/setter/toggler for the vjs-fluid `className` on the `Player`.\n   *\n   * Turning this on will turn off fill mode.\n   *\n   * @param {boolean} [bool]\n   *        - A value of true adds the class.\n   *        - A value of false removes the class.\n   *        - No value will be a getter.\n   *\n   * @return {boolean|undefined}\n   *         - The value of fluid when getting.\n   *         - `undefined` when setting.\n   */\n  ;\n\n  _proto.fluid = function fluid(bool) {\n    var _this3 = this;\n\n    if (bool === undefined) {\n      return !!this.fluid_;\n    }\n\n    this.fluid_ = !!bool;\n\n    if (isEvented(this)) {\n      this.off(['playerreset', 'resize'], this.boundUpdateStyleEl_);\n    }\n\n    if (bool) {\n      this.addClass('vjs-fluid');\n      this.fill(false);\n      addEventedCallback(this, function () {\n        _this3.on(['playerreset', 'resize'], _this3.boundUpdateStyleEl_);\n      });\n    } else {\n      this.removeClass('vjs-fluid');\n    }\n\n    this.updateStyleEl_();\n  }\n  /**\n   * A getter/setter/toggler for the vjs-fill `className` on the `Player`.\n   *\n   * Turning this on will turn off fluid mode.\n   *\n   * @param {boolean} [bool]\n   *        - A value of true adds the class.\n   *        - A value of false removes the class.\n   *        - No value will be a getter.\n   *\n   * @return {boolean|undefined}\n   *         - The value of fluid when getting.\n   *         - `undefined` when setting.\n   */\n  ;\n\n  _proto.fill = function fill(bool) {\n    if (bool === undefined) {\n      return !!this.fill_;\n    }\n\n    this.fill_ = !!bool;\n\n    if (bool) {\n      this.addClass('vjs-fill');\n      this.fluid(false);\n    } else {\n      this.removeClass('vjs-fill');\n    }\n  }\n  /**\n   * Get/Set the aspect ratio\n   *\n   * @param {string} [ratio]\n   *        Aspect ratio for player\n   *\n   * @return {string|undefined}\n   *         returns the current aspect ratio when getting\n   */\n\n  /**\n   * A getter/setter for the `Player`'s aspect ratio.\n   *\n   * @param {string} [ratio]\n   *        The value to set the `Player`'s aspect ratio to.\n   *\n   * @return {string|undefined}\n   *         - The current aspect ratio of the `Player` when getting.\n   *         - undefined when setting\n   */\n  ;\n\n  _proto.aspectRatio = function aspectRatio(ratio) {\n    if (ratio === undefined) {\n      return this.aspectRatio_;\n    } // Check for width:height format\n\n\n    if (!/^\\d+\\:\\d+$/.test(ratio)) {\n      throw new Error('Improper value supplied for aspect ratio. The format should be width:height, for example 16:9.');\n    }\n\n    this.aspectRatio_ = ratio; // We're assuming if you set an aspect ratio you want fluid mode,\n    // because in fixed mode you could calculate width and height yourself.\n\n    this.fluid(true);\n    this.updateStyleEl_();\n  }\n  /**\n   * Update styles of the `Player` element (height, width and aspect ratio).\n   *\n   * @private\n   * @listens Tech#loadedmetadata\n   */\n  ;\n\n  _proto.updateStyleEl_ = function updateStyleEl_() {\n    if (window$1.VIDEOJS_NO_DYNAMIC_STYLE === true) {\n      var _width = typeof this.width_ === 'number' ? this.width_ : this.options_.width;\n\n      var _height = typeof this.height_ === 'number' ? this.height_ : this.options_.height;\n\n      var techEl = this.tech_ && this.tech_.el();\n\n      if (techEl) {\n        if (_width >= 0) {\n          techEl.width = _width;\n        }\n\n        if (_height >= 0) {\n          techEl.height = _height;\n        }\n      }\n\n      return;\n    }\n\n    var width;\n    var height;\n    var aspectRatio;\n    var idClass; // The aspect ratio is either used directly or to calculate width and height.\n\n    if (this.aspectRatio_ !== undefined && this.aspectRatio_ !== 'auto') {\n      // Use any aspectRatio that's been specifically set\n      aspectRatio = this.aspectRatio_;\n    } else if (this.videoWidth() > 0) {\n      // Otherwise try to get the aspect ratio from the video metadata\n      aspectRatio = this.videoWidth() + ':' + this.videoHeight();\n    } else {\n      // Or use a default. The video element's is 2:1, but 16:9 is more common.\n      aspectRatio = '16:9';\n    } // Get the ratio as a decimal we can use to calculate dimensions\n\n\n    var ratioParts = aspectRatio.split(':');\n    var ratioMultiplier = ratioParts[1] / ratioParts[0];\n\n    if (this.width_ !== undefined) {\n      // Use any width that's been specifically set\n      width = this.width_;\n    } else if (this.height_ !== undefined) {\n      // Or calulate the width from the aspect ratio if a height has been set\n      width = this.height_ / ratioMultiplier;\n    } else {\n      // Or use the video's metadata, or use the video el's default of 300\n      width = this.videoWidth() || 300;\n    }\n\n    if (this.height_ !== undefined) {\n      // Use any height that's been specifically set\n      height = this.height_;\n    } else {\n      // Otherwise calculate the height from the ratio and the width\n      height = width * ratioMultiplier;\n    } // Ensure the CSS class is valid by starting with an alpha character\n\n\n    if (/^[^a-zA-Z]/.test(this.id())) {\n      idClass = 'dimensions-' + this.id();\n    } else {\n      idClass = this.id() + '-dimensions';\n    } // Ensure the right class is still on the player for the style element\n\n\n    this.addClass(idClass);\n    setTextContent(this.styleEl_, \"\\n      .\" + idClass + \" {\\n        width: \" + width + \"px;\\n        height: \" + height + \"px;\\n      }\\n\\n      .\" + idClass + \".vjs-fluid {\\n        padding-top: \" + ratioMultiplier * 100 + \"%;\\n      }\\n    \");\n  }\n  /**\n   * Load/Create an instance of playback {@link Tech} including element\n   * and API methods. Then append the `Tech` element in `Player` as a child.\n   *\n   * @param {string} techName\n   *        name of the playback technology\n   *\n   * @param {string} source\n   *        video source\n   *\n   * @private\n   */\n  ;\n\n  _proto.loadTech_ = function loadTech_(techName, source) {\n    var _this4 = this;\n\n    // Pause and remove current playback technology\n    if (this.tech_) {\n      this.unloadTech_();\n    }\n\n    var titleTechName = toTitleCase$1(techName);\n    var camelTechName = techName.charAt(0).toLowerCase() + techName.slice(1); // get rid of the HTML5 video tag as soon as we are using another tech\n\n    if (titleTechName !== 'Html5' && this.tag) {\n      Tech.getTech('Html5').disposeMediaElement(this.tag);\n      this.tag.player = null;\n      this.tag = null;\n    }\n\n    this.techName_ = titleTechName; // Turn off API access because we're loading a new tech that might load asynchronously\n\n    this.isReady_ = false;\n    var autoplay = this.autoplay(); // if autoplay is a string (or `true` with normalizeAutoplay: true) we pass false to the tech\n    // because the player is going to handle autoplay on `loadstart`\n\n    if (typeof this.autoplay() === 'string' || this.autoplay() === true && this.options_.normalizeAutoplay) {\n      autoplay = false;\n    } // Grab tech-specific options from player options and add source and parent element to use.\n\n\n    var techOptions = {\n      source: source,\n      autoplay: autoplay,\n      'nativeControlsForTouch': this.options_.nativeControlsForTouch,\n      'playerId': this.id(),\n      'techId': this.id() + \"_\" + camelTechName + \"_api\",\n      'playsinline': this.options_.playsinline,\n      'preload': this.options_.preload,\n      'loop': this.options_.loop,\n      'disablePictureInPicture': this.options_.disablePictureInPicture,\n      'muted': this.options_.muted,\n      'poster': this.poster(),\n      'language': this.language(),\n      'playerElIngest': this.playerElIngest_ || false,\n      'vtt.js': this.options_['vtt.js'],\n      'canOverridePoster': !!this.options_.techCanOverridePoster,\n      'enableSourceset': this.options_.enableSourceset,\n      'Promise': this.options_.Promise\n    };\n    ALL.names.forEach(function (name) {\n      var props = ALL[name];\n      techOptions[props.getterName] = _this4[props.privateName];\n    });\n    assign(techOptions, this.options_[titleTechName]);\n    assign(techOptions, this.options_[camelTechName]);\n    assign(techOptions, this.options_[techName.toLowerCase()]);\n\n    if (this.tag) {\n      techOptions.tag = this.tag;\n    }\n\n    if (source && source.src === this.cache_.src && this.cache_.currentTime > 0) {\n      techOptions.startTime = this.cache_.currentTime;\n    } // Initialize tech instance\n\n\n    var TechClass = Tech.getTech(techName);\n\n    if (!TechClass) {\n      throw new Error(\"No Tech named '\" + titleTechName + \"' exists! '\" + titleTechName + \"' should be registered using videojs.registerTech()'\");\n    }\n\n    this.tech_ = new TechClass(techOptions); // player.triggerReady is always async, so don't need this to be async\n\n    this.tech_.ready(bind(this, this.handleTechReady_), true);\n    textTrackConverter.jsonToTextTracks(this.textTracksJson_ || [], this.tech_); // Listen to all HTML5-defined events and trigger them on the player\n\n    TECH_EVENTS_RETRIGGER.forEach(function (event) {\n      _this4.on(_this4.tech_, event, function (e) {\n        return _this4[\"handleTech\" + toTitleCase$1(event) + \"_\"](e);\n      });\n    });\n    Object.keys(TECH_EVENTS_QUEUE).forEach(function (event) {\n      _this4.on(_this4.tech_, event, function (eventObj) {\n        if (_this4.tech_.playbackRate() === 0 && _this4.tech_.seeking()) {\n          _this4.queuedCallbacks_.push({\n            callback: _this4[\"handleTech\" + TECH_EVENTS_QUEUE[event] + \"_\"].bind(_this4),\n            event: eventObj\n          });\n\n          return;\n        }\n\n        _this4[\"handleTech\" + TECH_EVENTS_QUEUE[event] + \"_\"](eventObj);\n      });\n    });\n    this.on(this.tech_, 'loadstart', function (e) {\n      return _this4.handleTechLoadStart_(e);\n    });\n    this.on(this.tech_, 'sourceset', function (e) {\n      return _this4.handleTechSourceset_(e);\n    });\n    this.on(this.tech_, 'waiting', function (e) {\n      return _this4.handleTechWaiting_(e);\n    });\n    this.on(this.tech_, 'ended', function (e) {\n      return _this4.handleTechEnded_(e);\n    });\n    this.on(this.tech_, 'seeking', function (e) {\n      return _this4.handleTechSeeking_(e);\n    });\n    this.on(this.tech_, 'play', function (e) {\n      return _this4.handleTechPlay_(e);\n    });\n    this.on(this.tech_, 'firstplay', function (e) {\n      return _this4.handleTechFirstPlay_(e);\n    });\n    this.on(this.tech_, 'pause', function (e) {\n      return _this4.handleTechPause_(e);\n    });\n    this.on(this.tech_, 'durationchange', function (e) {\n      return _this4.handleTechDurationChange_(e);\n    });\n    this.on(this.tech_, 'fullscreenchange', function (e, data) {\n      return _this4.handleTechFullscreenChange_(e, data);\n    });\n    this.on(this.tech_, 'fullscreenerror', function (e, err) {\n      return _this4.handleTechFullscreenError_(e, err);\n    });\n    this.on(this.tech_, 'enterpictureinpicture', function (e) {\n      return _this4.handleTechEnterPictureInPicture_(e);\n    });\n    this.on(this.tech_, 'leavepictureinpicture', function (e) {\n      return _this4.handleTechLeavePictureInPicture_(e);\n    });\n    this.on(this.tech_, 'error', function (e) {\n      return _this4.handleTechError_(e);\n    });\n    this.on(this.tech_, 'posterchange', function (e) {\n      return _this4.handleTechPosterChange_(e);\n    });\n    this.on(this.tech_, 'textdata', function (e) {\n      return _this4.handleTechTextData_(e);\n    });\n    this.on(this.tech_, 'ratechange', function (e) {\n      return _this4.handleTechRateChange_(e);\n    });\n    this.on(this.tech_, 'loadedmetadata', this.boundUpdateStyleEl_);\n    this.usingNativeControls(this.techGet_('controls'));\n\n    if (this.controls() && !this.usingNativeControls()) {\n      this.addTechControlsListeners_();\n    } // Add the tech element in the DOM if it was not already there\n    // Make sure to not insert the original video element if using Html5\n\n\n    if (this.tech_.el().parentNode !== this.el() && (titleTechName !== 'Html5' || !this.tag)) {\n      prependTo(this.tech_.el(), this.el());\n    } // Get rid of the original video tag reference after the first tech is loaded\n\n\n    if (this.tag) {\n      this.tag.player = null;\n      this.tag = null;\n    }\n  }\n  /**\n   * Unload and dispose of the current playback {@link Tech}.\n   *\n   * @private\n   */\n  ;\n\n  _proto.unloadTech_ = function unloadTech_() {\n    var _this5 = this;\n\n    // Save the current text tracks so that we can reuse the same text tracks with the next tech\n    ALL.names.forEach(function (name) {\n      var props = ALL[name];\n      _this5[props.privateName] = _this5[props.getterName]();\n    });\n    this.textTracksJson_ = textTrackConverter.textTracksToJson(this.tech_);\n    this.isReady_ = false;\n    this.tech_.dispose();\n    this.tech_ = false;\n\n    if (this.isPosterFromTech_) {\n      this.poster_ = '';\n      this.trigger('posterchange');\n    }\n\n    this.isPosterFromTech_ = false;\n  }\n  /**\n   * Return a reference to the current {@link Tech}.\n   * It will print a warning by default about the danger of using the tech directly\n   * but any argument that is passed in will silence the warning.\n   *\n   * @param {*} [safety]\n   *        Anything passed in to silence the warning\n   *\n   * @return {Tech}\n   *         The Tech\n   */\n  ;\n\n  _proto.tech = function tech(safety) {\n    if (safety === undefined) {\n      log$1.warn('Using the tech directly can be dangerous. I hope you know what you\\'re doing.\\n' + 'See https://github.com/videojs/video.js/issues/2617 for more info.\\n');\n    }\n\n    return this.tech_;\n  }\n  /**\n   * Set up click and touch listeners for the playback element\n   *\n   * - On desktops: a click on the video itself will toggle playback\n   * - On mobile devices: a click on the video toggles controls\n   *   which is done by toggling the user state between active and\n   *   inactive\n   * - A tap can signal that a user has become active or has become inactive\n   *   e.g. a quick tap on an iPhone movie should reveal the controls. Another\n   *   quick tap should hide them again (signaling the user is in an inactive\n   *   viewing state)\n   * - In addition to this, we still want the user to be considered inactive after\n   *   a few seconds of inactivity.\n   *\n   * > Note: the only part of iOS interaction we can't mimic with this setup\n   * is a touch and hold on the video element counting as activity in order to\n   * keep the controls showing, but that shouldn't be an issue. A touch and hold\n   * on any controls will still keep the user active\n   *\n   * @private\n   */\n  ;\n\n  _proto.addTechControlsListeners_ = function addTechControlsListeners_() {\n    // Make sure to remove all the previous listeners in case we are called multiple times.\n    this.removeTechControlsListeners_();\n    this.on(this.tech_, 'click', this.boundHandleTechClick_);\n    this.on(this.tech_, 'dblclick', this.boundHandleTechDoubleClick_); // If the controls were hidden we don't want that to change without a tap event\n    // so we'll check if the controls were already showing before reporting user\n    // activity\n\n    this.on(this.tech_, 'touchstart', this.boundHandleTechTouchStart_);\n    this.on(this.tech_, 'touchmove', this.boundHandleTechTouchMove_);\n    this.on(this.tech_, 'touchend', this.boundHandleTechTouchEnd_); // The tap listener needs to come after the touchend listener because the tap\n    // listener cancels out any reportedUserActivity when setting userActive(false)\n\n    this.on(this.tech_, 'tap', this.boundHandleTechTap_);\n  }\n  /**\n   * Remove the listeners used for click and tap controls. This is needed for\n   * toggling to controls disabled, where a tap/touch should do nothing.\n   *\n   * @private\n   */\n  ;\n\n  _proto.removeTechControlsListeners_ = function removeTechControlsListeners_() {\n    // We don't want to just use `this.off()` because there might be other needed\n    // listeners added by techs that extend this.\n    this.off(this.tech_, 'tap', this.boundHandleTechTap_);\n    this.off(this.tech_, 'touchstart', this.boundHandleTechTouchStart_);\n    this.off(this.tech_, 'touchmove', this.boundHandleTechTouchMove_);\n    this.off(this.tech_, 'touchend', this.boundHandleTechTouchEnd_);\n    this.off(this.tech_, 'click', this.boundHandleTechClick_);\n    this.off(this.tech_, 'dblclick', this.boundHandleTechDoubleClick_);\n  }\n  /**\n   * Player waits for the tech to be ready\n   *\n   * @private\n   */\n  ;\n\n  _proto.handleTechReady_ = function handleTechReady_() {\n    this.triggerReady(); // Keep the same volume as before\n\n    if (this.cache_.volume) {\n      this.techCall_('setVolume', this.cache_.volume);\n    } // Look if the tech found a higher resolution poster while loading\n\n\n    this.handleTechPosterChange_(); // Update the duration if available\n\n    this.handleTechDurationChange_();\n  }\n  /**\n   * Retrigger the `loadstart` event that was triggered by the {@link Tech}. This\n   * function will also trigger {@link Player#firstplay} if it is the first loadstart\n   * for a video.\n   *\n   * @fires Player#loadstart\n   * @fires Player#firstplay\n   * @listens Tech#loadstart\n   * @private\n   */\n  ;\n\n  _proto.handleTechLoadStart_ = function handleTechLoadStart_() {\n    // TODO: Update to use `emptied` event instead. See #1277.\n    this.removeClass('vjs-ended');\n    this.removeClass('vjs-seeking'); // reset the error state\n\n    this.error(null); // Update the duration\n\n    this.handleTechDurationChange_(); // If it's already playing we want to trigger a firstplay event now.\n    // The firstplay event relies on both the play and loadstart events\n    // which can happen in any order for a new source\n\n    if (!this.paused()) {\n      /**\n       * Fired when the user agent begins looking for media data\n       *\n       * @event Player#loadstart\n       * @type {EventTarget~Event}\n       */\n      this.trigger('loadstart');\n      this.trigger('firstplay');\n    } else {\n      // reset the hasStarted state\n      this.hasStarted(false);\n      this.trigger('loadstart');\n    } // autoplay happens after loadstart for the browser,\n    // so we mimic that behavior\n\n\n    this.manualAutoplay_(this.autoplay() === true && this.options_.normalizeAutoplay ? 'play' : this.autoplay());\n  }\n  /**\n   * Handle autoplay string values, rather than the typical boolean\n   * values that should be handled by the tech. Note that this is not\n   * part of any specification. Valid values and what they do can be\n   * found on the autoplay getter at Player#autoplay()\n   */\n  ;\n\n  _proto.manualAutoplay_ = function manualAutoplay_(type) {\n    var _this6 = this;\n\n    if (!this.tech_ || typeof type !== 'string') {\n      return;\n    } // Save original muted() value, set muted to true, and attempt to play().\n    // On promise rejection, restore muted from saved value\n\n\n    var resolveMuted = function resolveMuted() {\n      var previouslyMuted = _this6.muted();\n\n      _this6.muted(true);\n\n      var restoreMuted = function restoreMuted() {\n        _this6.muted(previouslyMuted);\n      }; // restore muted on play terminatation\n\n\n      _this6.playTerminatedQueue_.push(restoreMuted);\n\n      var mutedPromise = _this6.play();\n\n      if (!isPromise(mutedPromise)) {\n        return;\n      }\n\n      return mutedPromise[\"catch\"](function (err) {\n        restoreMuted();\n        throw new Error(\"Rejection at manualAutoplay. Restoring muted value. \" + (err ? err : ''));\n      });\n    };\n\n    var promise; // if muted defaults to true\n    // the only thing we can do is call play\n\n    if (type === 'any' && !this.muted()) {\n      promise = this.play();\n\n      if (isPromise(promise)) {\n        promise = promise[\"catch\"](resolveMuted);\n      }\n    } else if (type === 'muted' && !this.muted()) {\n      promise = resolveMuted();\n    } else {\n      promise = this.play();\n    }\n\n    if (!isPromise(promise)) {\n      return;\n    }\n\n    return promise.then(function () {\n      _this6.trigger({\n        type: 'autoplay-success',\n        autoplay: type\n      });\n    })[\"catch\"](function () {\n      _this6.trigger({\n        type: 'autoplay-failure',\n        autoplay: type\n      });\n    });\n  }\n  /**\n   * Update the internal source caches so that we return the correct source from\n   * `src()`, `currentSource()`, and `currentSources()`.\n   *\n   * > Note: `currentSources` will not be updated if the source that is passed in exists\n   *         in the current `currentSources` cache.\n   *\n   *\n   * @param {Tech~SourceObject} srcObj\n   *        A string or object source to update our caches to.\n   */\n  ;\n\n  _proto.updateSourceCaches_ = function updateSourceCaches_(srcObj) {\n    if (srcObj === void 0) {\n      srcObj = '';\n    }\n\n    var src = srcObj;\n    var type = '';\n\n    if (typeof src !== 'string') {\n      src = srcObj.src;\n      type = srcObj.type;\n    } // make sure all the caches are set to default values\n    // to prevent null checking\n\n\n    this.cache_.source = this.cache_.source || {};\n    this.cache_.sources = this.cache_.sources || []; // try to get the type of the src that was passed in\n\n    if (src && !type) {\n      type = findMimetype(this, src);\n    } // update `currentSource` cache always\n\n\n    this.cache_.source = mergeOptions$3({}, srcObj, {\n      src: src,\n      type: type\n    });\n    var matchingSources = this.cache_.sources.filter(function (s) {\n      return s.src && s.src === src;\n    });\n    var sourceElSources = [];\n    var sourceEls = this.$$('source');\n    var matchingSourceEls = [];\n\n    for (var i = 0; i < sourceEls.length; i++) {\n      var sourceObj = getAttributes(sourceEls[i]);\n      sourceElSources.push(sourceObj);\n\n      if (sourceObj.src && sourceObj.src === src) {\n        matchingSourceEls.push(sourceObj.src);\n      }\n    } // if we have matching source els but not matching sources\n    // the current source cache is not up to date\n\n\n    if (matchingSourceEls.length && !matchingSources.length) {\n      this.cache_.sources = sourceElSources; // if we don't have matching source or source els set the\n      // sources cache to the `currentSource` cache\n    } else if (!matchingSources.length) {\n      this.cache_.sources = [this.cache_.source];\n    } // update the tech `src` cache\n\n\n    this.cache_.src = src;\n  }\n  /**\n   * *EXPERIMENTAL* Fired when the source is set or changed on the {@link Tech}\n   * causing the media element to reload.\n   *\n   * It will fire for the initial source and each subsequent source.\n   * This event is a custom event from Video.js and is triggered by the {@link Tech}.\n   *\n   * The event object for this event contains a `src` property that will contain the source\n   * that was available when the event was triggered. This is generally only necessary if Video.js\n   * is switching techs while the source was being changed.\n   *\n   * It is also fired when `load` is called on the player (or media element)\n   * because the {@link https://html.spec.whatwg.org/multipage/media.html#dom-media-load|specification for `load`}\n   * says that the resource selection algorithm needs to be aborted and restarted.\n   * In this case, it is very likely that the `src` property will be set to the\n   * empty string `\"\"` to indicate we do not know what the source will be but\n   * that it is changing.\n   *\n   * *This event is currently still experimental and may change in minor releases.*\n   * __To use this, pass `enableSourceset` option to the player.__\n   *\n   * @event Player#sourceset\n   * @type {EventTarget~Event}\n   * @prop {string} src\n   *                The source url available when the `sourceset` was triggered.\n   *                It will be an empty string if we cannot know what the source is\n   *                but know that the source will change.\n   */\n\n  /**\n   * Retrigger the `sourceset` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#sourceset\n   * @listens Tech#sourceset\n   * @private\n   */\n  ;\n\n  _proto.handleTechSourceset_ = function handleTechSourceset_(event) {\n    var _this7 = this;\n\n    // only update the source cache when the source\n    // was not updated using the player api\n    if (!this.changingSrc_) {\n      var updateSourceCaches = function updateSourceCaches(src) {\n        return _this7.updateSourceCaches_(src);\n      };\n\n      var playerSrc = this.currentSource().src;\n      var eventSrc = event.src; // if we have a playerSrc that is not a blob, and a tech src that is a blob\n\n      if (playerSrc && !/^blob:/.test(playerSrc) && /^blob:/.test(eventSrc)) {\n        // if both the tech source and the player source were updated we assume\n        // something like @videojs/http-streaming did the sourceset and skip updating the source cache.\n        if (!this.lastSource_ || this.lastSource_.tech !== eventSrc && this.lastSource_.player !== playerSrc) {\n          updateSourceCaches = function updateSourceCaches() {};\n        }\n      } // update the source to the initial source right away\n      // in some cases this will be empty string\n\n\n      updateSourceCaches(eventSrc); // if the `sourceset` `src` was an empty string\n      // wait for a `loadstart` to update the cache to `currentSrc`.\n      // If a sourceset happens before a `loadstart`, we reset the state\n\n      if (!event.src) {\n        this.tech_.any(['sourceset', 'loadstart'], function (e) {\n          // if a sourceset happens before a `loadstart` there\n          // is nothing to do as this `handleTechSourceset_`\n          // will be called again and this will be handled there.\n          if (e.type === 'sourceset') {\n            return;\n          }\n\n          var techSrc = _this7.techGet('currentSrc');\n\n          _this7.lastSource_.tech = techSrc;\n\n          _this7.updateSourceCaches_(techSrc);\n        });\n      }\n    }\n\n    this.lastSource_ = {\n      player: this.currentSource().src,\n      tech: event.src\n    };\n    this.trigger({\n      src: event.src,\n      type: 'sourceset'\n    });\n  }\n  /**\n   * Add/remove the vjs-has-started class\n   *\n   * @fires Player#firstplay\n   *\n   * @param {boolean} request\n   *        - true: adds the class\n   *        - false: remove the class\n   *\n   * @return {boolean}\n   *         the boolean value of hasStarted_\n   */\n  ;\n\n  _proto.hasStarted = function hasStarted(request) {\n    if (request === undefined) {\n      // act as getter, if we have no request to change\n      return this.hasStarted_;\n    }\n\n    if (request === this.hasStarted_) {\n      return;\n    }\n\n    this.hasStarted_ = request;\n\n    if (this.hasStarted_) {\n      this.addClass('vjs-has-started');\n      this.trigger('firstplay');\n    } else {\n      this.removeClass('vjs-has-started');\n    }\n  }\n  /**\n   * Fired whenever the media begins or resumes playback\n   *\n   * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-play}\n   * @fires Player#play\n   * @listens Tech#play\n   * @private\n   */\n  ;\n\n  _proto.handleTechPlay_ = function handleTechPlay_() {\n    this.removeClass('vjs-ended');\n    this.removeClass('vjs-paused');\n    this.addClass('vjs-playing'); // hide the poster when the user hits play\n\n    this.hasStarted(true);\n    /**\n     * Triggered whenever an {@link Tech#play} event happens. Indicates that\n     * playback has started or resumed.\n     *\n     * @event Player#play\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('play');\n  }\n  /**\n   * Retrigger the `ratechange` event that was triggered by the {@link Tech}.\n   *\n   * If there were any events queued while the playback rate was zero, fire\n   * those events now.\n   *\n   * @private\n   * @method Player#handleTechRateChange_\n   * @fires Player#ratechange\n   * @listens Tech#ratechange\n   */\n  ;\n\n  _proto.handleTechRateChange_ = function handleTechRateChange_() {\n    if (this.tech_.playbackRate() > 0 && this.cache_.lastPlaybackRate === 0) {\n      this.queuedCallbacks_.forEach(function (queued) {\n        return queued.callback(queued.event);\n      });\n      this.queuedCallbacks_ = [];\n    }\n\n    this.cache_.lastPlaybackRate = this.tech_.playbackRate();\n    /**\n     * Fires when the playing speed of the audio/video is changed\n     *\n     * @event Player#ratechange\n     * @type {event}\n     */\n\n    this.trigger('ratechange');\n  }\n  /**\n   * Retrigger the `waiting` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#waiting\n   * @listens Tech#waiting\n   * @private\n   */\n  ;\n\n  _proto.handleTechWaiting_ = function handleTechWaiting_() {\n    var _this8 = this;\n\n    this.addClass('vjs-waiting');\n    /**\n     * A readyState change on the DOM element has caused playback to stop.\n     *\n     * @event Player#waiting\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('waiting'); // Browsers may emit a timeupdate event after a waiting event. In order to prevent\n    // premature removal of the waiting class, wait for the time to change.\n\n    var timeWhenWaiting = this.currentTime();\n\n    var timeUpdateListener = function timeUpdateListener() {\n      if (timeWhenWaiting !== _this8.currentTime()) {\n        _this8.removeClass('vjs-waiting');\n\n        _this8.off('timeupdate', timeUpdateListener);\n      }\n    };\n\n    this.on('timeupdate', timeUpdateListener);\n  }\n  /**\n   * Retrigger the `canplay` event that was triggered by the {@link Tech}.\n   * > Note: This is not consistent between browsers. See #1351\n   *\n   * @fires Player#canplay\n   * @listens Tech#canplay\n   * @private\n   */\n  ;\n\n  _proto.handleTechCanPlay_ = function handleTechCanPlay_() {\n    this.removeClass('vjs-waiting');\n    /**\n     * The media has a readyState of HAVE_FUTURE_DATA or greater.\n     *\n     * @event Player#canplay\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('canplay');\n  }\n  /**\n   * Retrigger the `canplaythrough` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#canplaythrough\n   * @listens Tech#canplaythrough\n   * @private\n   */\n  ;\n\n  _proto.handleTechCanPlayThrough_ = function handleTechCanPlayThrough_() {\n    this.removeClass('vjs-waiting');\n    /**\n     * The media has a readyState of HAVE_ENOUGH_DATA or greater. This means that the\n     * entire media file can be played without buffering.\n     *\n     * @event Player#canplaythrough\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('canplaythrough');\n  }\n  /**\n   * Retrigger the `playing` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#playing\n   * @listens Tech#playing\n   * @private\n   */\n  ;\n\n  _proto.handleTechPlaying_ = function handleTechPlaying_() {\n    this.removeClass('vjs-waiting');\n    /**\n     * The media is no longer blocked from playback, and has started playing.\n     *\n     * @event Player#playing\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('playing');\n  }\n  /**\n   * Retrigger the `seeking` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#seeking\n   * @listens Tech#seeking\n   * @private\n   */\n  ;\n\n  _proto.handleTechSeeking_ = function handleTechSeeking_() {\n    this.addClass('vjs-seeking');\n    /**\n     * Fired whenever the player is jumping to a new time\n     *\n     * @event Player#seeking\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('seeking');\n  }\n  /**\n   * Retrigger the `seeked` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#seeked\n   * @listens Tech#seeked\n   * @private\n   */\n  ;\n\n  _proto.handleTechSeeked_ = function handleTechSeeked_() {\n    this.removeClass('vjs-seeking');\n    this.removeClass('vjs-ended');\n    /**\n     * Fired when the player has finished jumping to a new time\n     *\n     * @event Player#seeked\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('seeked');\n  }\n  /**\n   * Retrigger the `firstplay` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#firstplay\n   * @listens Tech#firstplay\n   * @deprecated As of 6.0 firstplay event is deprecated.\n   *             As of 6.0 passing the `starttime` option to the player and the firstplay event are deprecated.\n   * @private\n   */\n  ;\n\n  _proto.handleTechFirstPlay_ = function handleTechFirstPlay_() {\n    // If the first starttime attribute is specified\n    // then we will start at the given offset in seconds\n    if (this.options_.starttime) {\n      log$1.warn('Passing the `starttime` option to the player will be deprecated in 6.0');\n      this.currentTime(this.options_.starttime);\n    }\n\n    this.addClass('vjs-has-started');\n    /**\n     * Fired the first time a video is played. Not part of the HLS spec, and this is\n     * probably not the best implementation yet, so use sparingly. If you don't have a\n     * reason to prevent playback, use `myPlayer.one('play');` instead.\n     *\n     * @event Player#firstplay\n     * @deprecated As of 6.0 firstplay event is deprecated.\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('firstplay');\n  }\n  /**\n   * Retrigger the `pause` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#pause\n   * @listens Tech#pause\n   * @private\n   */\n  ;\n\n  _proto.handleTechPause_ = function handleTechPause_() {\n    this.removeClass('vjs-playing');\n    this.addClass('vjs-paused');\n    /**\n     * Fired whenever the media has been paused\n     *\n     * @event Player#pause\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('pause');\n  }\n  /**\n   * Retrigger the `ended` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#ended\n   * @listens Tech#ended\n   * @private\n   */\n  ;\n\n  _proto.handleTechEnded_ = function handleTechEnded_() {\n    this.addClass('vjs-ended');\n    this.removeClass('vjs-waiting');\n\n    if (this.options_.loop) {\n      this.currentTime(0);\n      this.play();\n    } else if (!this.paused()) {\n      this.pause();\n    }\n    /**\n     * Fired when the end of the media resource is reached (currentTime == duration)\n     *\n     * @event Player#ended\n     * @type {EventTarget~Event}\n     */\n\n\n    this.trigger('ended');\n  }\n  /**\n   * Fired when the duration of the media resource is first known or changed\n   *\n   * @listens Tech#durationchange\n   * @private\n   */\n  ;\n\n  _proto.handleTechDurationChange_ = function handleTechDurationChange_() {\n    this.duration(this.techGet_('duration'));\n  }\n  /**\n   * Handle a click on the media element to play/pause\n   *\n   * @param {EventTarget~Event} event\n   *        the event that caused this function to trigger\n   *\n   * @listens Tech#click\n   * @private\n   */\n  ;\n\n  _proto.handleTechClick_ = function handleTechClick_(event) {\n    // When controls are disabled a click should not toggle playback because\n    // the click is considered a control\n    if (!this.controls_) {\n      return;\n    }\n\n    if (this.options_ === undefined || this.options_.userActions === undefined || this.options_.userActions.click === undefined || this.options_.userActions.click !== false) {\n      if (this.options_ !== undefined && this.options_.userActions !== undefined && typeof this.options_.userActions.click === 'function') {\n        this.options_.userActions.click.call(this, event);\n      } else if (this.paused()) {\n        silencePromise(this.play());\n      } else {\n        this.pause();\n      }\n    }\n  }\n  /**\n   * Handle a double-click on the media element to enter/exit fullscreen\n   *\n   * @param {EventTarget~Event} event\n   *        the event that caused this function to trigger\n   *\n   * @listens Tech#dblclick\n   * @private\n   */\n  ;\n\n  _proto.handleTechDoubleClick_ = function handleTechDoubleClick_(event) {\n    if (!this.controls_) {\n      return;\n    } // we do not want to toggle fullscreen state\n    // when double-clicking inside a control bar or a modal\n\n\n    var inAllowedEls = Array.prototype.some.call(this.$$('.vjs-control-bar, .vjs-modal-dialog'), function (el) {\n      return el.contains(event.target);\n    });\n\n    if (!inAllowedEls) {\n      /*\n       * options.userActions.doubleClick\n       *\n       * If `undefined` or `true`, double-click toggles fullscreen if controls are present\n       * Set to `false` to disable double-click handling\n       * Set to a function to substitute an external double-click handler\n       */\n      if (this.options_ === undefined || this.options_.userActions === undefined || this.options_.userActions.doubleClick === undefined || this.options_.userActions.doubleClick !== false) {\n        if (this.options_ !== undefined && this.options_.userActions !== undefined && typeof this.options_.userActions.doubleClick === 'function') {\n          this.options_.userActions.doubleClick.call(this, event);\n        } else if (this.isFullscreen()) {\n          this.exitFullscreen();\n        } else {\n          this.requestFullscreen();\n        }\n      }\n    }\n  }\n  /**\n   * Handle a tap on the media element. It will toggle the user\n   * activity state, which hides and shows the controls.\n   *\n   * @listens Tech#tap\n   * @private\n   */\n  ;\n\n  _proto.handleTechTap_ = function handleTechTap_() {\n    this.userActive(!this.userActive());\n  }\n  /**\n   * Handle touch to start\n   *\n   * @listens Tech#touchstart\n   * @private\n   */\n  ;\n\n  _proto.handleTechTouchStart_ = function handleTechTouchStart_() {\n    this.userWasActive = this.userActive();\n  }\n  /**\n   * Handle touch to move\n   *\n   * @listens Tech#touchmove\n   * @private\n   */\n  ;\n\n  _proto.handleTechTouchMove_ = function handleTechTouchMove_() {\n    if (this.userWasActive) {\n      this.reportUserActivity();\n    }\n  }\n  /**\n   * Handle touch to end\n   *\n   * @param {EventTarget~Event} event\n   *        the touchend event that triggered\n   *        this function\n   *\n   * @listens Tech#touchend\n   * @private\n   */\n  ;\n\n  _proto.handleTechTouchEnd_ = function handleTechTouchEnd_(event) {\n    // Stop the mouse events from also happening\n    if (event.cancelable) {\n      event.preventDefault();\n    }\n  }\n  /**\n   * native click events on the SWF aren't triggered on IE11, Win8.1RT\n   * use stageclick events triggered from inside the SWF instead\n   *\n   * @private\n   * @listens stageclick\n   */\n  ;\n\n  _proto.handleStageClick_ = function handleStageClick_() {\n    this.reportUserActivity();\n  }\n  /**\n   * @private\n   */\n  ;\n\n  _proto.toggleFullscreenClass_ = function toggleFullscreenClass_() {\n    if (this.isFullscreen()) {\n      this.addClass('vjs-fullscreen');\n    } else {\n      this.removeClass('vjs-fullscreen');\n    }\n  }\n  /**\n   * when the document fschange event triggers it calls this\n   */\n  ;\n\n  _proto.documentFullscreenChange_ = function documentFullscreenChange_(e) {\n    var targetPlayer = e.target.player; // if another player was fullscreen\n    // do a null check for targetPlayer because older firefox's would put document as e.target\n\n    if (targetPlayer && targetPlayer !== this) {\n      return;\n    }\n\n    var el = this.el();\n    var isFs = document[this.fsApi_.fullscreenElement] === el;\n\n    if (!isFs && el.matches) {\n      isFs = el.matches(':' + this.fsApi_.fullscreen);\n    } else if (!isFs && el.msMatchesSelector) {\n      isFs = el.msMatchesSelector(':' + this.fsApi_.fullscreen);\n    }\n\n    this.isFullscreen(isFs);\n  }\n  /**\n   * Handle Tech Fullscreen Change\n   *\n   * @param {EventTarget~Event} event\n   *        the fullscreenchange event that triggered this function\n   *\n   * @param {Object} data\n   *        the data that was sent with the event\n   *\n   * @private\n   * @listens Tech#fullscreenchange\n   * @fires Player#fullscreenchange\n   */\n  ;\n\n  _proto.handleTechFullscreenChange_ = function handleTechFullscreenChange_(event, data) {\n    var _this9 = this;\n\n    if (data) {\n      if (data.nativeIOSFullscreen) {\n        this.addClass('vjs-ios-native-fs');\n        this.tech_.one('webkitendfullscreen', function () {\n          _this9.removeClass('vjs-ios-native-fs');\n        });\n      }\n\n      this.isFullscreen(data.isFullscreen);\n    }\n  };\n\n  _proto.handleTechFullscreenError_ = function handleTechFullscreenError_(event, err) {\n    this.trigger('fullscreenerror', err);\n  }\n  /**\n   * @private\n   */\n  ;\n\n  _proto.togglePictureInPictureClass_ = function togglePictureInPictureClass_() {\n    if (this.isInPictureInPicture()) {\n      this.addClass('vjs-picture-in-picture');\n    } else {\n      this.removeClass('vjs-picture-in-picture');\n    }\n  }\n  /**\n   * Handle Tech Enter Picture-in-Picture.\n   *\n   * @param {EventTarget~Event} event\n   *        the enterpictureinpicture event that triggered this function\n   *\n   * @private\n   * @listens Tech#enterpictureinpicture\n   */\n  ;\n\n  _proto.handleTechEnterPictureInPicture_ = function handleTechEnterPictureInPicture_(event) {\n    this.isInPictureInPicture(true);\n  }\n  /**\n   * Handle Tech Leave Picture-in-Picture.\n   *\n   * @param {EventTarget~Event} event\n   *        the leavepictureinpicture event that triggered this function\n   *\n   * @private\n   * @listens Tech#leavepictureinpicture\n   */\n  ;\n\n  _proto.handleTechLeavePictureInPicture_ = function handleTechLeavePictureInPicture_(event) {\n    this.isInPictureInPicture(false);\n  }\n  /**\n   * Fires when an error occurred during the loading of an audio/video.\n   *\n   * @private\n   * @listens Tech#error\n   */\n  ;\n\n  _proto.handleTechError_ = function handleTechError_() {\n    var error = this.tech_.error();\n    this.error(error);\n  }\n  /**\n   * Retrigger the `textdata` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#textdata\n   * @listens Tech#textdata\n   * @private\n   */\n  ;\n\n  _proto.handleTechTextData_ = function handleTechTextData_() {\n    var data = null;\n\n    if (arguments.length > 1) {\n      data = arguments[1];\n    }\n    /**\n     * Fires when we get a textdata event from tech\n     *\n     * @event Player#textdata\n     * @type {EventTarget~Event}\n     */\n\n\n    this.trigger('textdata', data);\n  }\n  /**\n   * Get object for cached values.\n   *\n   * @return {Object}\n   *         get the current object cache\n   */\n  ;\n\n  _proto.getCache = function getCache() {\n    return this.cache_;\n  }\n  /**\n   * Resets the internal cache object.\n   *\n   * Using this function outside the player constructor or reset method may\n   * have unintended side-effects.\n   *\n   * @private\n   */\n  ;\n\n  _proto.resetCache_ = function resetCache_() {\n    this.cache_ = {\n      // Right now, the currentTime is not _really_ cached because it is always\n      // retrieved from the tech (see: currentTime). However, for completeness,\n      // we set it to zero here to ensure that if we do start actually caching\n      // it, we reset it along with everything else.\n      currentTime: 0,\n      initTime: 0,\n      inactivityTimeout: this.options_.inactivityTimeout,\n      duration: NaN,\n      lastVolume: 1,\n      lastPlaybackRate: this.defaultPlaybackRate(),\n      media: null,\n      src: '',\n      source: {},\n      sources: [],\n      playbackRates: [],\n      volume: 1\n    };\n  }\n  /**\n   * Pass values to the playback tech\n   *\n   * @param {string} [method]\n   *        the method to call\n   *\n   * @param {Object} arg\n   *        the argument to pass\n   *\n   * @private\n   */\n  ;\n\n  _proto.techCall_ = function techCall_(method, arg) {\n    // If it's not ready yet, call method when it is\n    this.ready(function () {\n      if (method in allowedSetters) {\n        return set(this.middleware_, this.tech_, method, arg);\n      } else if (method in allowedMediators) {\n        return mediate(this.middleware_, this.tech_, method, arg);\n      }\n\n      try {\n        if (this.tech_) {\n          this.tech_[method](arg);\n        }\n      } catch (e) {\n        log$1(e);\n        throw e;\n      }\n    }, true);\n  }\n  /**\n   * Get calls can't wait for the tech, and sometimes don't need to.\n   *\n   * @param {string} method\n   *        Tech method\n   *\n   * @return {Function|undefined}\n   *         the method or undefined\n   *\n   * @private\n   */\n  ;\n\n  _proto.techGet_ = function techGet_(method) {\n    if (!this.tech_ || !this.tech_.isReady_) {\n      return;\n    }\n\n    if (method in allowedGetters) {\n      return get(this.middleware_, this.tech_, method);\n    } else if (method in allowedMediators) {\n      return mediate(this.middleware_, this.tech_, method);\n    } // Flash likes to die and reload when you hide or reposition it.\n    // In these cases the object methods go away and we get errors.\n    // TODO: Is this needed for techs other than Flash?\n    // When that happens we'll catch the errors and inform tech that it's not ready any more.\n\n\n    try {\n      return this.tech_[method]();\n    } catch (e) {\n      // When building additional tech libs, an expected method may not be defined yet\n      if (this.tech_[method] === undefined) {\n        log$1(\"Video.js: \" + method + \" method not defined for \" + this.techName_ + \" playback technology.\", e);\n        throw e;\n      } // When a method isn't available on the object it throws a TypeError\n\n\n      if (e.name === 'TypeError') {\n        log$1(\"Video.js: \" + method + \" unavailable on \" + this.techName_ + \" playback technology element.\", e);\n        this.tech_.isReady_ = false;\n        throw e;\n      } // If error unknown, just log and throw\n\n\n      log$1(e);\n      throw e;\n    }\n  }\n  /**\n   * Attempt to begin playback at the first opportunity.\n   *\n   * @return {Promise|undefined}\n   *         Returns a promise if the browser supports Promises (or one\n   *         was passed in as an option). This promise will be resolved on\n   *         the return value of play. If this is undefined it will fulfill the\n   *         promise chain otherwise the promise chain will be fulfilled when\n   *         the promise from play is fulfilled.\n   */\n  ;\n\n  _proto.play = function play() {\n    var _this10 = this;\n\n    var PromiseClass = this.options_.Promise || window$1.Promise;\n\n    if (PromiseClass) {\n      return new PromiseClass(function (resolve) {\n        _this10.play_(resolve);\n      });\n    }\n\n    return this.play_();\n  }\n  /**\n   * The actual logic for play, takes a callback that will be resolved on the\n   * return value of play. This allows us to resolve to the play promise if there\n   * is one on modern browsers.\n   *\n   * @private\n   * @param {Function} [callback]\n   *        The callback that should be called when the techs play is actually called\n   */\n  ;\n\n  _proto.play_ = function play_(callback) {\n    var _this11 = this;\n\n    if (callback === void 0) {\n      callback = silencePromise;\n    }\n\n    this.playCallbacks_.push(callback);\n    var isSrcReady = Boolean(!this.changingSrc_ && (this.src() || this.currentSrc())); // treat calls to play_ somewhat like the `one` event function\n\n    if (this.waitToPlay_) {\n      this.off(['ready', 'loadstart'], this.waitToPlay_);\n      this.waitToPlay_ = null;\n    } // if the player/tech is not ready or the src itself is not ready\n    // queue up a call to play on `ready` or `loadstart`\n\n\n    if (!this.isReady_ || !isSrcReady) {\n      this.waitToPlay_ = function (e) {\n        _this11.play_();\n      };\n\n      this.one(['ready', 'loadstart'], this.waitToPlay_); // if we are in Safari, there is a high chance that loadstart will trigger after the gesture timeperiod\n      // in that case, we need to prime the video element by calling load so it'll be ready in time\n\n      if (!isSrcReady && (IS_ANY_SAFARI || IS_IOS)) {\n        this.load();\n      }\n\n      return;\n    } // If the player/tech is ready and we have a source, we can attempt playback.\n\n\n    var val = this.techGet_('play'); // play was terminated if the returned value is null\n\n    if (val === null) {\n      this.runPlayTerminatedQueue_();\n    } else {\n      this.runPlayCallbacks_(val);\n    }\n  }\n  /**\n   * These functions will be run when if play is terminated. If play\n   * runPlayCallbacks_ is run these function will not be run. This allows us\n   * to differenciate between a terminated play and an actual call to play.\n   */\n  ;\n\n  _proto.runPlayTerminatedQueue_ = function runPlayTerminatedQueue_() {\n    var queue = this.playTerminatedQueue_.slice(0);\n    this.playTerminatedQueue_ = [];\n    queue.forEach(function (q) {\n      q();\n    });\n  }\n  /**\n   * When a callback to play is delayed we have to run these\n   * callbacks when play is actually called on the tech. This function\n   * runs the callbacks that were delayed and accepts the return value\n   * from the tech.\n   *\n   * @param {undefined|Promise} val\n   *        The return value from the tech.\n   */\n  ;\n\n  _proto.runPlayCallbacks_ = function runPlayCallbacks_(val) {\n    var callbacks = this.playCallbacks_.slice(0);\n    this.playCallbacks_ = []; // clear play terminatedQueue since we finished a real play\n\n    this.playTerminatedQueue_ = [];\n    callbacks.forEach(function (cb) {\n      cb(val);\n    });\n  }\n  /**\n   * Pause the video playback\n   *\n   * @return {Player}\n   *         A reference to the player object this function was called on\n   */\n  ;\n\n  _proto.pause = function pause() {\n    this.techCall_('pause');\n  }\n  /**\n   * Check if the player is paused or has yet to play\n   *\n   * @return {boolean}\n   *         - false: if the media is currently playing\n   *         - true: if media is not currently playing\n   */\n  ;\n\n  _proto.paused = function paused() {\n    // The initial state of paused should be true (in Safari it's actually false)\n    return this.techGet_('paused') === false ? false : true;\n  }\n  /**\n   * Get a TimeRange object representing the current ranges of time that the user\n   * has played.\n   *\n   * @return {TimeRange}\n   *         A time range object that represents all the increments of time that have\n   *         been played.\n   */\n  ;\n\n  _proto.played = function played() {\n    return this.techGet_('played') || createTimeRanges(0, 0);\n  }\n  /**\n   * Returns whether or not the user is \"scrubbing\". Scrubbing is\n   * when the user has clicked the progress bar handle and is\n   * dragging it along the progress bar.\n   *\n   * @param {boolean} [isScrubbing]\n   *        whether the user is or is not scrubbing\n   *\n   * @return {boolean}\n   *         The value of scrubbing when getting\n   */\n  ;\n\n  _proto.scrubbing = function scrubbing(isScrubbing) {\n    if (typeof isScrubbing === 'undefined') {\n      return this.scrubbing_;\n    }\n\n    this.scrubbing_ = !!isScrubbing;\n    this.techCall_('setScrubbing', this.scrubbing_);\n\n    if (isScrubbing) {\n      this.addClass('vjs-scrubbing');\n    } else {\n      this.removeClass('vjs-scrubbing');\n    }\n  }\n  /**\n   * Get or set the current time (in seconds)\n   *\n   * @param {number|string} [seconds]\n   *        The time to seek to in seconds\n   *\n   * @return {number}\n   *         - the current time in seconds when getting\n   */\n  ;\n\n  _proto.currentTime = function currentTime(seconds) {\n    if (typeof seconds !== 'undefined') {\n      if (seconds < 0) {\n        seconds = 0;\n      }\n\n      if (!this.isReady_ || this.changingSrc_ || !this.tech_ || !this.tech_.isReady_) {\n        this.cache_.initTime = seconds;\n        this.off('canplay', this.boundApplyInitTime_);\n        this.one('canplay', this.boundApplyInitTime_);\n        return;\n      }\n\n      this.techCall_('setCurrentTime', seconds);\n      this.cache_.initTime = 0;\n      return;\n    } // cache last currentTime and return. default to 0 seconds\n    //\n    // Caching the currentTime is meant to prevent a massive amount of reads on the tech's\n    // currentTime when scrubbing, but may not provide much performance benefit afterall.\n    // Should be tested. Also something has to read the actual current time or the cache will\n    // never get updated.\n\n\n    this.cache_.currentTime = this.techGet_('currentTime') || 0;\n    return this.cache_.currentTime;\n  }\n  /**\n   * Apply the value of initTime stored in cache as currentTime.\n   *\n   * @private\n   */\n  ;\n\n  _proto.applyInitTime_ = function applyInitTime_() {\n    this.currentTime(this.cache_.initTime);\n  }\n  /**\n   * Normally gets the length in time of the video in seconds;\n   * in all but the rarest use cases an argument will NOT be passed to the method\n   *\n   * > **NOTE**: The video must have started loading before the duration can be\n   * known, and depending on preload behaviour may not be known until the video starts\n   * playing.\n   *\n   * @fires Player#durationchange\n   *\n   * @param {number} [seconds]\n   *        The duration of the video to set in seconds\n   *\n   * @return {number}\n   *         - The duration of the video in seconds when getting\n   */\n  ;\n\n  _proto.duration = function duration(seconds) {\n    if (seconds === undefined) {\n      // return NaN if the duration is not known\n      return this.cache_.duration !== undefined ? this.cache_.duration : NaN;\n    }\n\n    seconds = parseFloat(seconds); // Standardize on Infinity for signaling video is live\n\n    if (seconds < 0) {\n      seconds = Infinity;\n    }\n\n    if (seconds !== this.cache_.duration) {\n      // Cache the last set value for optimized scrubbing (esp. Flash)\n      // TODO: Required for techs other than Flash?\n      this.cache_.duration = seconds;\n\n      if (seconds === Infinity) {\n        this.addClass('vjs-live');\n      } else {\n        this.removeClass('vjs-live');\n      }\n\n      if (!isNaN(seconds)) {\n        // Do not fire durationchange unless the duration value is known.\n        // @see [Spec]{@link https://www.w3.org/TR/2011/WD-html5-20110113/video.html#media-element-load-algorithm}\n\n        /**\n         * @event Player#durationchange\n         * @type {EventTarget~Event}\n         */\n        this.trigger('durationchange');\n      }\n    }\n  }\n  /**\n   * Calculates how much time is left in the video. Not part\n   * of the native video API.\n   *\n   * @return {number}\n   *         The time remaining in seconds\n   */\n  ;\n\n  _proto.remainingTime = function remainingTime() {\n    return this.duration() - this.currentTime();\n  }\n  /**\n   * A remaining time function that is intented to be used when\n   * the time is to be displayed directly to the user.\n   *\n   * @return {number}\n   *         The rounded time remaining in seconds\n   */\n  ;\n\n  _proto.remainingTimeDisplay = function remainingTimeDisplay() {\n    return Math.floor(this.duration()) - Math.floor(this.currentTime());\n  } //\n  // Kind of like an array of portions of the video that have been downloaded.\n\n  /**\n   * Get a TimeRange object with an array of the times of the video\n   * that have been downloaded. If you just want the percent of the\n   * video that's been downloaded, use bufferedPercent.\n   *\n   * @see [Buffered Spec]{@link http://dev.w3.org/html5/spec/video.html#dom-media-buffered}\n   *\n   * @return {TimeRange}\n   *         A mock TimeRange object (following HTML spec)\n   */\n  ;\n\n  _proto.buffered = function buffered() {\n    var buffered = this.techGet_('buffered');\n\n    if (!buffered || !buffered.length) {\n      buffered = createTimeRanges(0, 0);\n    }\n\n    return buffered;\n  }\n  /**\n   * Get the percent (as a decimal) of the video that's been downloaded.\n   * This method is not a part of the native HTML video API.\n   *\n   * @return {number}\n   *         A decimal between 0 and 1 representing the percent\n   *         that is buffered 0 being 0% and 1 being 100%\n   */\n  ;\n\n  _proto.bufferedPercent = function bufferedPercent$1() {\n    return bufferedPercent(this.buffered(), this.duration());\n  }\n  /**\n   * Get the ending time of the last buffered time range\n   * This is used in the progress bar to encapsulate all time ranges.\n   *\n   * @return {number}\n   *         The end of the last buffered time range\n   */\n  ;\n\n  _proto.bufferedEnd = function bufferedEnd() {\n    var buffered = this.buffered();\n    var duration = this.duration();\n    var end = buffered.end(buffered.length - 1);\n\n    if (end > duration) {\n      end = duration;\n    }\n\n    return end;\n  }\n  /**\n   * Get or set the current volume of the media\n   *\n   * @param  {number} [percentAsDecimal]\n   *         The new volume as a decimal percent:\n   *         - 0 is muted/0%/off\n   *         - 1.0 is 100%/full\n   *         - 0.5 is half volume or 50%\n   *\n   * @return {number}\n   *         The current volume as a percent when getting\n   */\n  ;\n\n  _proto.volume = function volume(percentAsDecimal) {\n    var vol;\n\n    if (percentAsDecimal !== undefined) {\n      // Force value to between 0 and 1\n      vol = Math.max(0, Math.min(1, parseFloat(percentAsDecimal)));\n      this.cache_.volume = vol;\n      this.techCall_('setVolume', vol);\n\n      if (vol > 0) {\n        this.lastVolume_(vol);\n      }\n\n      return;\n    } // Default to 1 when returning current volume.\n\n\n    vol = parseFloat(this.techGet_('volume'));\n    return isNaN(vol) ? 1 : vol;\n  }\n  /**\n   * Get the current muted state, or turn mute on or off\n   *\n   * @param {boolean} [muted]\n   *        - true to mute\n   *        - false to unmute\n   *\n   * @return {boolean}\n   *         - true if mute is on and getting\n   *         - false if mute is off and getting\n   */\n  ;\n\n  _proto.muted = function muted(_muted) {\n    if (_muted !== undefined) {\n      this.techCall_('setMuted', _muted);\n      return;\n    }\n\n    return this.techGet_('muted') || false;\n  }\n  /**\n   * Get the current defaultMuted state, or turn defaultMuted on or off. defaultMuted\n   * indicates the state of muted on initial playback.\n   *\n   * ```js\n   *   var myPlayer = videojs('some-player-id');\n   *\n   *   myPlayer.src(\"http://www.example.com/path/to/video.mp4\");\n   *\n   *   // get, should be false\n   *   console.log(myPlayer.defaultMuted());\n   *   // set to true\n   *   myPlayer.defaultMuted(true);\n   *   // get should be true\n   *   console.log(myPlayer.defaultMuted());\n   * ```\n   *\n   * @param {boolean} [defaultMuted]\n   *        - true to mute\n   *        - false to unmute\n   *\n   * @return {boolean|Player}\n   *         - true if defaultMuted is on and getting\n   *         - false if defaultMuted is off and getting\n   *         - A reference to the current player when setting\n   */\n  ;\n\n  _proto.defaultMuted = function defaultMuted(_defaultMuted) {\n    if (_defaultMuted !== undefined) {\n      return this.techCall_('setDefaultMuted', _defaultMuted);\n    }\n\n    return this.techGet_('defaultMuted') || false;\n  }\n  /**\n   * Get the last volume, or set it\n   *\n   * @param  {number} [percentAsDecimal]\n   *         The new last volume as a decimal percent:\n   *         - 0 is muted/0%/off\n   *         - 1.0 is 100%/full\n   *         - 0.5 is half volume or 50%\n   *\n   * @return {number}\n   *         the current value of lastVolume as a percent when getting\n   *\n   * @private\n   */\n  ;\n\n  _proto.lastVolume_ = function lastVolume_(percentAsDecimal) {\n    if (percentAsDecimal !== undefined && percentAsDecimal !== 0) {\n      this.cache_.lastVolume = percentAsDecimal;\n      return;\n    }\n\n    return this.cache_.lastVolume;\n  }\n  /**\n   * Check if current tech can support native fullscreen\n   * (e.g. with built in controls like iOS)\n   *\n   * @return {boolean}\n   *         if native fullscreen is supported\n   */\n  ;\n\n  _proto.supportsFullScreen = function supportsFullScreen() {\n    return this.techGet_('supportsFullScreen') || false;\n  }\n  /**\n   * Check if the player is in fullscreen mode or tell the player that it\n   * is or is not in fullscreen mode.\n   *\n   * > NOTE: As of the latest HTML5 spec, isFullscreen is no longer an official\n   * property and instead document.fullscreenElement is used. But isFullscreen is\n   * still a valuable property for internal player workings.\n   *\n   * @param  {boolean} [isFS]\n   *         Set the players current fullscreen state\n   *\n   * @return {boolean}\n   *         - true if fullscreen is on and getting\n   *         - false if fullscreen is off and getting\n   */\n  ;\n\n  _proto.isFullscreen = function isFullscreen(isFS) {\n    if (isFS !== undefined) {\n      var oldValue = this.isFullscreen_;\n      this.isFullscreen_ = Boolean(isFS); // if we changed fullscreen state and we're in prefixed mode, trigger fullscreenchange\n      // this is the only place where we trigger fullscreenchange events for older browsers\n      // fullWindow mode is treated as a prefixed event and will get a fullscreenchange event as well\n\n      if (this.isFullscreen_ !== oldValue && this.fsApi_.prefixed) {\n        /**\n           * @event Player#fullscreenchange\n           * @type {EventTarget~Event}\n           */\n        this.trigger('fullscreenchange');\n      }\n\n      this.toggleFullscreenClass_();\n      return;\n    }\n\n    return this.isFullscreen_;\n  }\n  /**\n   * Increase the size of the video to full screen\n   * In some browsers, full screen is not supported natively, so it enters\n   * \"full window mode\", where the video fills the browser window.\n   * In browsers and devices that support native full screen, sometimes the\n   * browser's default controls will be shown, and not the Video.js custom skin.\n   * This includes most mobile devices (iOS, Android) and older versions of\n   * Safari.\n   *\n   * @param  {Object} [fullscreenOptions]\n   *         Override the player fullscreen options\n   *\n   * @fires Player#fullscreenchange\n   */\n  ;\n\n  _proto.requestFullscreen = function requestFullscreen(fullscreenOptions) {\n    var PromiseClass = this.options_.Promise || window$1.Promise;\n\n    if (PromiseClass) {\n      var self = this;\n      return new PromiseClass(function (resolve, reject) {\n        function offHandler() {\n          self.off('fullscreenerror', errorHandler);\n          self.off('fullscreenchange', changeHandler);\n        }\n\n        function changeHandler() {\n          offHandler();\n          resolve();\n        }\n\n        function errorHandler(e, err) {\n          offHandler();\n          reject(err);\n        }\n\n        self.one('fullscreenchange', changeHandler);\n        self.one('fullscreenerror', errorHandler);\n        var promise = self.requestFullscreenHelper_(fullscreenOptions);\n\n        if (promise) {\n          promise.then(offHandler, offHandler);\n          promise.then(resolve, reject);\n        }\n      });\n    }\n\n    return this.requestFullscreenHelper_();\n  };\n\n  _proto.requestFullscreenHelper_ = function requestFullscreenHelper_(fullscreenOptions) {\n    var _this12 = this;\n\n    var fsOptions; // Only pass fullscreen options to requestFullscreen in spec-compliant browsers.\n    // Use defaults or player configured option unless passed directly to this method.\n\n    if (!this.fsApi_.prefixed) {\n      fsOptions = this.options_.fullscreen && this.options_.fullscreen.options || {};\n\n      if (fullscreenOptions !== undefined) {\n        fsOptions = fullscreenOptions;\n      }\n    } // This method works as follows:\n    // 1. if a fullscreen api is available, use it\n    //   1. call requestFullscreen with potential options\n    //   2. if we got a promise from above, use it to update isFullscreen()\n    // 2. otherwise, if the tech supports fullscreen, call `enterFullScreen` on it.\n    //   This is particularly used for iPhone, older iPads, and non-safari browser on iOS.\n    // 3. otherwise, use \"fullWindow\" mode\n\n\n    if (this.fsApi_.requestFullscreen) {\n      var promise = this.el_[this.fsApi_.requestFullscreen](fsOptions);\n\n      if (promise) {\n        promise.then(function () {\n          return _this12.isFullscreen(true);\n        }, function () {\n          return _this12.isFullscreen(false);\n        });\n      }\n\n      return promise;\n    } else if (this.tech_.supportsFullScreen() && !this.options_.preferFullWindow === true) {\n      // we can't take the video.js controls fullscreen but we can go fullscreen\n      // with native controls\n      this.techCall_('enterFullScreen');\n    } else {\n      // fullscreen isn't supported so we'll just stretch the video element to\n      // fill the viewport\n      this.enterFullWindow();\n    }\n  }\n  /**\n   * Return the video to its normal size after having been in full screen mode\n   *\n   * @fires Player#fullscreenchange\n   */\n  ;\n\n  _proto.exitFullscreen = function exitFullscreen() {\n    var PromiseClass = this.options_.Promise || window$1.Promise;\n\n    if (PromiseClass) {\n      var self = this;\n      return new PromiseClass(function (resolve, reject) {\n        function offHandler() {\n          self.off('fullscreenerror', errorHandler);\n          self.off('fullscreenchange', changeHandler);\n        }\n\n        function changeHandler() {\n          offHandler();\n          resolve();\n        }\n\n        function errorHandler(e, err) {\n          offHandler();\n          reject(err);\n        }\n\n        self.one('fullscreenchange', changeHandler);\n        self.one('fullscreenerror', errorHandler);\n        var promise = self.exitFullscreenHelper_();\n\n        if (promise) {\n          promise.then(offHandler, offHandler); // map the promise to our resolve/reject methods\n\n          promise.then(resolve, reject);\n        }\n      });\n    }\n\n    return this.exitFullscreenHelper_();\n  };\n\n  _proto.exitFullscreenHelper_ = function exitFullscreenHelper_() {\n    var _this13 = this;\n\n    if (this.fsApi_.requestFullscreen) {\n      var promise = document[this.fsApi_.exitFullscreen]();\n\n      if (promise) {\n        // we're splitting the promise here, so, we want to catch the\n        // potential error so that this chain doesn't have unhandled errors\n        silencePromise(promise.then(function () {\n          return _this13.isFullscreen(false);\n        }));\n      }\n\n      return promise;\n    } else if (this.tech_.supportsFullScreen() && !this.options_.preferFullWindow === true) {\n      this.techCall_('exitFullScreen');\n    } else {\n      this.exitFullWindow();\n    }\n  }\n  /**\n   * When fullscreen isn't supported we can stretch the\n   * video container to as wide as the browser will let us.\n   *\n   * @fires Player#enterFullWindow\n   */\n  ;\n\n  _proto.enterFullWindow = function enterFullWindow() {\n    this.isFullscreen(true);\n    this.isFullWindow = true; // Storing original doc overflow value to return to when fullscreen is off\n\n    this.docOrigOverflow = document.documentElement.style.overflow; // Add listener for esc key to exit fullscreen\n\n    on(document, 'keydown', this.boundFullWindowOnEscKey_); // Hide any scroll bars\n\n    document.documentElement.style.overflow = 'hidden'; // Apply fullscreen styles\n\n    addClass(document.body, 'vjs-full-window');\n    /**\n     * @event Player#enterFullWindow\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('enterFullWindow');\n  }\n  /**\n   * Check for call to either exit full window or\n   * full screen on ESC key\n   *\n   * @param {string} event\n   *        Event to check for key press\n   */\n  ;\n\n  _proto.fullWindowOnEscKey = function fullWindowOnEscKey(event) {\n    if (keycode.isEventKey(event, 'Esc')) {\n      if (this.isFullscreen() === true) {\n        if (!this.isFullWindow) {\n          this.exitFullscreen();\n        } else {\n          this.exitFullWindow();\n        }\n      }\n    }\n  }\n  /**\n   * Exit full window\n   *\n   * @fires Player#exitFullWindow\n   */\n  ;\n\n  _proto.exitFullWindow = function exitFullWindow() {\n    this.isFullscreen(false);\n    this.isFullWindow = false;\n    off(document, 'keydown', this.boundFullWindowOnEscKey_); // Unhide scroll bars.\n\n    document.documentElement.style.overflow = this.docOrigOverflow; // Remove fullscreen styles\n\n    removeClass(document.body, 'vjs-full-window'); // Resize the box, controller, and poster to original sizes\n    // this.positionAll();\n\n    /**\n     * @event Player#exitFullWindow\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('exitFullWindow');\n  }\n  /**\n   * Disable Picture-in-Picture mode.\n   *\n   * @param {boolean} value\n   *                  - true will disable Picture-in-Picture mode\n   *                  - false will enable Picture-in-Picture mode\n   */\n  ;\n\n  _proto.disablePictureInPicture = function disablePictureInPicture(value) {\n    if (value === undefined) {\n      return this.techGet_('disablePictureInPicture');\n    }\n\n    this.techCall_('setDisablePictureInPicture', value);\n    this.options_.disablePictureInPicture = value;\n    this.trigger('disablepictureinpicturechanged');\n  }\n  /**\n   * Check if the player is in Picture-in-Picture mode or tell the player that it\n   * is or is not in Picture-in-Picture mode.\n   *\n   * @param  {boolean} [isPiP]\n   *         Set the players current Picture-in-Picture state\n   *\n   * @return {boolean}\n   *         - true if Picture-in-Picture is on and getting\n   *         - false if Picture-in-Picture is off and getting\n   */\n  ;\n\n  _proto.isInPictureInPicture = function isInPictureInPicture(isPiP) {\n    if (isPiP !== undefined) {\n      this.isInPictureInPicture_ = !!isPiP;\n      this.togglePictureInPictureClass_();\n      return;\n    }\n\n    return !!this.isInPictureInPicture_;\n  }\n  /**\n   * Create a floating video window always on top of other windows so that users may\n   * continue consuming media while they interact with other content sites, or\n   * applications on their device.\n   *\n   * @see [Spec]{@link https://wicg.github.io/picture-in-picture}\n   *\n   * @fires Player#enterpictureinpicture\n   *\n   * @return {Promise}\n   *         A promise with a Picture-in-Picture window.\n   */\n  ;\n\n  _proto.requestPictureInPicture = function requestPictureInPicture() {\n    if ('pictureInPictureEnabled' in document && this.disablePictureInPicture() === false) {\n      /**\n       * This event fires when the player enters picture in picture mode\n       *\n       * @event Player#enterpictureinpicture\n       * @type {EventTarget~Event}\n       */\n      return this.techGet_('requestPictureInPicture');\n    }\n  }\n  /**\n   * Exit Picture-in-Picture mode.\n   *\n   * @see [Spec]{@link https://wicg.github.io/picture-in-picture}\n   *\n   * @fires Player#leavepictureinpicture\n   *\n   * @return {Promise}\n   *         A promise.\n   */\n  ;\n\n  _proto.exitPictureInPicture = function exitPictureInPicture() {\n    if ('pictureInPictureEnabled' in document) {\n      /**\n       * This event fires when the player leaves picture in picture mode\n       *\n       * @event Player#leavepictureinpicture\n       * @type {EventTarget~Event}\n       */\n      return document.exitPictureInPicture();\n    }\n  }\n  /**\n   * Called when this Player has focus and a key gets pressed down, or when\n   * any Component of this player receives a key press that it doesn't handle.\n   * This allows player-wide hotkeys (either as defined below, or optionally\n   * by an external function).\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    var userActions = this.options_.userActions; // Bail out if hotkeys are not configured.\n\n    if (!userActions || !userActions.hotkeys) {\n      return;\n    } // Function that determines whether or not to exclude an element from\n    // hotkeys handling.\n\n\n    var excludeElement = function excludeElement(el) {\n      var tagName = el.tagName.toLowerCase(); // The first and easiest test is for `contenteditable` elements.\n\n      if (el.isContentEditable) {\n        return true;\n      } // Inputs matching these types will still trigger hotkey handling as\n      // they are not text inputs.\n\n\n      var allowedInputTypes = ['button', 'checkbox', 'hidden', 'radio', 'reset', 'submit'];\n\n      if (tagName === 'input') {\n        return allowedInputTypes.indexOf(el.type) === -1;\n      } // The final test is by tag name. These tags will be excluded entirely.\n\n\n      var excludedTags = ['textarea'];\n      return excludedTags.indexOf(tagName) !== -1;\n    }; // Bail out if the user is focused on an interactive form element.\n\n\n    if (excludeElement(this.el_.ownerDocument.activeElement)) {\n      return;\n    }\n\n    if (typeof userActions.hotkeys === 'function') {\n      userActions.hotkeys.call(this, event);\n    } else {\n      this.handleHotkeys(event);\n    }\n  }\n  /**\n   * Called when this Player receives a hotkey keydown event.\n   * Supported player-wide hotkeys are:\n   *\n   *   f          - toggle fullscreen\n   *   m          - toggle mute\n   *   k or Space - toggle play/pause\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   */\n  ;\n\n  _proto.handleHotkeys = function handleHotkeys(event) {\n    var hotkeys = this.options_.userActions ? this.options_.userActions.hotkeys : {}; // set fullscreenKey, muteKey, playPauseKey from `hotkeys`, use defaults if not set\n\n    var _hotkeys$fullscreenKe = hotkeys.fullscreenKey,\n        fullscreenKey = _hotkeys$fullscreenKe === void 0 ? function (keydownEvent) {\n      return keycode.isEventKey(keydownEvent, 'f');\n    } : _hotkeys$fullscreenKe,\n        _hotkeys$muteKey = hotkeys.muteKey,\n        muteKey = _hotkeys$muteKey === void 0 ? function (keydownEvent) {\n      return keycode.isEventKey(keydownEvent, 'm');\n    } : _hotkeys$muteKey,\n        _hotkeys$playPauseKey = hotkeys.playPauseKey,\n        playPauseKey = _hotkeys$playPauseKey === void 0 ? function (keydownEvent) {\n      return keycode.isEventKey(keydownEvent, 'k') || keycode.isEventKey(keydownEvent, 'Space');\n    } : _hotkeys$playPauseKey;\n\n    if (fullscreenKey.call(this, event)) {\n      event.preventDefault();\n      event.stopPropagation();\n      var FSToggle = Component$1.getComponent('FullscreenToggle');\n\n      if (document[this.fsApi_.fullscreenEnabled] !== false) {\n        FSToggle.prototype.handleClick.call(this, event);\n      }\n    } else if (muteKey.call(this, event)) {\n      event.preventDefault();\n      event.stopPropagation();\n      var MuteToggle = Component$1.getComponent('MuteToggle');\n      MuteToggle.prototype.handleClick.call(this, event);\n    } else if (playPauseKey.call(this, event)) {\n      event.preventDefault();\n      event.stopPropagation();\n      var PlayToggle = Component$1.getComponent('PlayToggle');\n      PlayToggle.prototype.handleClick.call(this, event);\n    }\n  }\n  /**\n   * Check whether the player can play a given mimetype\n   *\n   * @see https://www.w3.org/TR/2011/WD-html5-20110113/video.html#dom-navigator-canplaytype\n   *\n   * @param {string} type\n   *        The mimetype to check\n   *\n   * @return {string}\n   *         'probably', 'maybe', or '' (empty string)\n   */\n  ;\n\n  _proto.canPlayType = function canPlayType(type) {\n    var can; // Loop through each playback technology in the options order\n\n    for (var i = 0, j = this.options_.techOrder; i < j.length; i++) {\n      var techName = j[i];\n      var tech = Tech.getTech(techName); // Support old behavior of techs being registered as components.\n      // Remove once that deprecated behavior is removed.\n\n      if (!tech) {\n        tech = Component$1.getComponent(techName);\n      } // Check if the current tech is defined before continuing\n\n\n      if (!tech) {\n        log$1.error(\"The \\\"\" + techName + \"\\\" tech is undefined. Skipped browser support check for that tech.\");\n        continue;\n      } // Check if the browser supports this technology\n\n\n      if (tech.isSupported()) {\n        can = tech.canPlayType(type);\n\n        if (can) {\n          return can;\n        }\n      }\n    }\n\n    return '';\n  }\n  /**\n   * Select source based on tech-order or source-order\n   * Uses source-order selection if `options.sourceOrder` is truthy. Otherwise,\n   * defaults to tech-order selection\n   *\n   * @param {Array} sources\n   *        The sources for a media asset\n   *\n   * @return {Object|boolean}\n   *         Object of source and tech order or false\n   */\n  ;\n\n  _proto.selectSource = function selectSource(sources) {\n    var _this14 = this;\n\n    // Get only the techs specified in `techOrder` that exist and are supported by the\n    // current platform\n    var techs = this.options_.techOrder.map(function (techName) {\n      return [techName, Tech.getTech(techName)];\n    }).filter(function (_ref) {\n      var techName = _ref[0],\n          tech = _ref[1];\n\n      // Check if the current tech is defined before continuing\n      if (tech) {\n        // Check if the browser supports this technology\n        return tech.isSupported();\n      }\n\n      log$1.error(\"The \\\"\" + techName + \"\\\" tech is undefined. Skipped browser support check for that tech.\");\n      return false;\n    }); // Iterate over each `innerArray` element once per `outerArray` element and execute\n    // `tester` with both. If `tester` returns a non-falsy value, exit early and return\n    // that value.\n\n    var findFirstPassingTechSourcePair = function findFirstPassingTechSourcePair(outerArray, innerArray, tester) {\n      var found;\n      outerArray.some(function (outerChoice) {\n        return innerArray.some(function (innerChoice) {\n          found = tester(outerChoice, innerChoice);\n\n          if (found) {\n            return true;\n          }\n        });\n      });\n      return found;\n    };\n\n    var foundSourceAndTech;\n\n    var flip = function flip(fn) {\n      return function (a, b) {\n        return fn(b, a);\n      };\n    };\n\n    var finder = function finder(_ref2, source) {\n      var techName = _ref2[0],\n          tech = _ref2[1];\n\n      if (tech.canPlaySource(source, _this14.options_[techName.toLowerCase()])) {\n        return {\n          source: source,\n          tech: techName\n        };\n      }\n    }; // Depending on the truthiness of `options.sourceOrder`, we swap the order of techs and sources\n    // to select from them based on their priority.\n\n\n    if (this.options_.sourceOrder) {\n      // Source-first ordering\n      foundSourceAndTech = findFirstPassingTechSourcePair(sources, techs, flip(finder));\n    } else {\n      // Tech-first ordering\n      foundSourceAndTech = findFirstPassingTechSourcePair(techs, sources, finder);\n    }\n\n    return foundSourceAndTech || false;\n  }\n  /**\n   * Executes source setting and getting logic\n   *\n   * @param {Tech~SourceObject|Tech~SourceObject[]|string} [source]\n   *        A SourceObject, an array of SourceObjects, or a string referencing\n   *        a URL to a media source. It is _highly recommended_ that an object\n   *        or array of objects is used here, so that source selection\n   *        algorithms can take the `type` into account.\n   *\n   *        If not provided, this method acts as a getter.\n   * @param {boolean} isRetry\n   *        Indicates whether this is being called internally as a result of a retry\n   *\n   * @return {string|undefined}\n   *         If the `source` argument is missing, returns the current source\n   *         URL. Otherwise, returns nothing/undefined.\n   */\n  ;\n\n  _proto.handleSrc_ = function handleSrc_(source, isRetry) {\n    var _this15 = this;\n\n    // getter usage\n    if (typeof source === 'undefined') {\n      return this.cache_.src || '';\n    } // Reset retry behavior for new source\n\n\n    if (this.resetRetryOnError_) {\n      this.resetRetryOnError_();\n    } // filter out invalid sources and turn our source into\n    // an array of source objects\n\n\n    var sources = filterSource(source); // if a source was passed in then it is invalid because\n    // it was filtered to a zero length Array. So we have to\n    // show an error\n\n    if (!sources.length) {\n      this.setTimeout(function () {\n        this.error({\n          code: 4,\n          message: this.localize(this.options_.notSupportedMessage)\n        });\n      }, 0);\n      return;\n    } // initial sources\n\n\n    this.changingSrc_ = true; // Only update the cached source list if we are not retrying a new source after error,\n    // since in that case we want to include the failed source(s) in the cache\n\n    if (!isRetry) {\n      this.cache_.sources = sources;\n    }\n\n    this.updateSourceCaches_(sources[0]); // middlewareSource is the source after it has been changed by middleware\n\n    setSource(this, sources[0], function (middlewareSource, mws) {\n      _this15.middleware_ = mws; // since sourceSet is async we have to update the cache again after we select a source since\n      // the source that is selected could be out of order from the cache update above this callback.\n\n      if (!isRetry) {\n        _this15.cache_.sources = sources;\n      }\n\n      _this15.updateSourceCaches_(middlewareSource);\n\n      var err = _this15.src_(middlewareSource);\n\n      if (err) {\n        if (sources.length > 1) {\n          return _this15.handleSrc_(sources.slice(1));\n        }\n\n        _this15.changingSrc_ = false; // We need to wrap this in a timeout to give folks a chance to add error event handlers\n\n        _this15.setTimeout(function () {\n          this.error({\n            code: 4,\n            message: this.localize(this.options_.notSupportedMessage)\n          });\n        }, 0); // we could not find an appropriate tech, but let's still notify the delegate that this is it\n        // this needs a better comment about why this is needed\n\n\n        _this15.triggerReady();\n\n        return;\n      }\n\n      setTech(mws, _this15.tech_);\n    }); // Try another available source if this one fails before playback.\n\n    if (this.options_.retryOnError && sources.length > 1) {\n      var retry = function retry() {\n        // Remove the error modal\n        _this15.error(null);\n\n        _this15.handleSrc_(sources.slice(1), true);\n      };\n\n      var stopListeningForErrors = function stopListeningForErrors() {\n        _this15.off('error', retry);\n      };\n\n      this.one('error', retry);\n      this.one('playing', stopListeningForErrors);\n\n      this.resetRetryOnError_ = function () {\n        _this15.off('error', retry);\n\n        _this15.off('playing', stopListeningForErrors);\n      };\n    }\n  }\n  /**\n   * Get or set the video source.\n   *\n   * @param {Tech~SourceObject|Tech~SourceObject[]|string} [source]\n   *        A SourceObject, an array of SourceObjects, or a string referencing\n   *        a URL to a media source. It is _highly recommended_ that an object\n   *        or array of objects is used here, so that source selection\n   *        algorithms can take the `type` into account.\n   *\n   *        If not provided, this method acts as a getter.\n   *\n   * @return {string|undefined}\n   *         If the `source` argument is missing, returns the current source\n   *         URL. Otherwise, returns nothing/undefined.\n   */\n  ;\n\n  _proto.src = function src(source) {\n    return this.handleSrc_(source, false);\n  }\n  /**\n   * Set the source object on the tech, returns a boolean that indicates whether\n   * there is a tech that can play the source or not\n   *\n   * @param {Tech~SourceObject} source\n   *        The source object to set on the Tech\n   *\n   * @return {boolean}\n   *         - True if there is no Tech to playback this source\n   *         - False otherwise\n   *\n   * @private\n   */\n  ;\n\n  _proto.src_ = function src_(source) {\n    var _this16 = this;\n\n    var sourceTech = this.selectSource([source]);\n\n    if (!sourceTech) {\n      return true;\n    }\n\n    if (!titleCaseEquals(sourceTech.tech, this.techName_)) {\n      this.changingSrc_ = true; // load this technology with the chosen source\n\n      this.loadTech_(sourceTech.tech, sourceTech.source);\n      this.tech_.ready(function () {\n        _this16.changingSrc_ = false;\n      });\n      return false;\n    } // wait until the tech is ready to set the source\n    // and set it synchronously if possible (#2326)\n\n\n    this.ready(function () {\n      // The setSource tech method was added with source handlers\n      // so older techs won't support it\n      // We need to check the direct prototype for the case where subclasses\n      // of the tech do not support source handlers\n      if (this.tech_.constructor.prototype.hasOwnProperty('setSource')) {\n        this.techCall_('setSource', source);\n      } else {\n        this.techCall_('src', source.src);\n      }\n\n      this.changingSrc_ = false;\n    }, true);\n    return false;\n  }\n  /**\n   * Begin loading the src data.\n   */\n  ;\n\n  _proto.load = function load() {\n    this.techCall_('load');\n  }\n  /**\n   * Reset the player. Loads the first tech in the techOrder,\n   * removes all the text tracks in the existing `tech`,\n   * and calls `reset` on the `tech`.\n   */\n  ;\n\n  _proto.reset = function reset() {\n    var _this17 = this;\n\n    var PromiseClass = this.options_.Promise || window$1.Promise;\n\n    if (this.paused() || !PromiseClass) {\n      this.doReset_();\n    } else {\n      var playPromise = this.play();\n      silencePromise(playPromise.then(function () {\n        return _this17.doReset_();\n      }));\n    }\n  };\n\n  _proto.doReset_ = function doReset_() {\n    if (this.tech_) {\n      this.tech_.clearTracks('text');\n    }\n\n    this.resetCache_();\n    this.poster('');\n    this.loadTech_(this.options_.techOrder[0], null);\n    this.techCall_('reset');\n    this.resetControlBarUI_();\n\n    if (isEvented(this)) {\n      this.trigger('playerreset');\n    }\n  }\n  /**\n   * Reset Control Bar's UI by calling sub-methods that reset\n   * all of Control Bar's components\n   */\n  ;\n\n  _proto.resetControlBarUI_ = function resetControlBarUI_() {\n    this.resetProgressBar_();\n    this.resetPlaybackRate_();\n    this.resetVolumeBar_();\n  }\n  /**\n   * Reset tech's progress so progress bar is reset in the UI\n   */\n  ;\n\n  _proto.resetProgressBar_ = function resetProgressBar_() {\n    this.currentTime(0);\n    var _this$controlBar = this.controlBar,\n        durationDisplay = _this$controlBar.durationDisplay,\n        remainingTimeDisplay = _this$controlBar.remainingTimeDisplay;\n\n    if (durationDisplay) {\n      durationDisplay.updateContent();\n    }\n\n    if (remainingTimeDisplay) {\n      remainingTimeDisplay.updateContent();\n    }\n  }\n  /**\n   * Reset Playback ratio\n   */\n  ;\n\n  _proto.resetPlaybackRate_ = function resetPlaybackRate_() {\n    this.playbackRate(this.defaultPlaybackRate());\n    this.handleTechRateChange_();\n  }\n  /**\n   * Reset Volume bar\n   */\n  ;\n\n  _proto.resetVolumeBar_ = function resetVolumeBar_() {\n    this.volume(1.0);\n    this.trigger('volumechange');\n  }\n  /**\n   * Returns all of the current source objects.\n   *\n   * @return {Tech~SourceObject[]}\n   *         The current source objects\n   */\n  ;\n\n  _proto.currentSources = function currentSources() {\n    var source = this.currentSource();\n    var sources = []; // assume `{}` or `{ src }`\n\n    if (Object.keys(source).length !== 0) {\n      sources.push(source);\n    }\n\n    return this.cache_.sources || sources;\n  }\n  /**\n   * Returns the current source object.\n   *\n   * @return {Tech~SourceObject}\n   *         The current source object\n   */\n  ;\n\n  _proto.currentSource = function currentSource() {\n    return this.cache_.source || {};\n  }\n  /**\n   * Returns the fully qualified URL of the current source value e.g. http://mysite.com/video.mp4\n   * Can be used in conjunction with `currentType` to assist in rebuilding the current source object.\n   *\n   * @return {string}\n   *         The current source\n   */\n  ;\n\n  _proto.currentSrc = function currentSrc() {\n    return this.currentSource() && this.currentSource().src || '';\n  }\n  /**\n   * Get the current source type e.g. video/mp4\n   * This can allow you rebuild the current source object so that you could load the same\n   * source and tech later\n   *\n   * @return {string}\n   *         The source MIME type\n   */\n  ;\n\n  _proto.currentType = function currentType() {\n    return this.currentSource() && this.currentSource().type || '';\n  }\n  /**\n   * Get or set the preload attribute\n   *\n   * @param {boolean} [value]\n   *        - true means that we should preload\n   *        - false means that we should not preload\n   *\n   * @return {string}\n   *         The preload attribute value when getting\n   */\n  ;\n\n  _proto.preload = function preload(value) {\n    if (value !== undefined) {\n      this.techCall_('setPreload', value);\n      this.options_.preload = value;\n      return;\n    }\n\n    return this.techGet_('preload');\n  }\n  /**\n   * Get or set the autoplay option. When this is a boolean it will\n   * modify the attribute on the tech. When this is a string the attribute on\n   * the tech will be removed and `Player` will handle autoplay on loadstarts.\n   *\n   * @param {boolean|string} [value]\n   *        - true: autoplay using the browser behavior\n   *        - false: do not autoplay\n   *        - 'play': call play() on every loadstart\n   *        - 'muted': call muted() then play() on every loadstart\n   *        - 'any': call play() on every loadstart. if that fails call muted() then play().\n   *        - *: values other than those listed here will be set `autoplay` to true\n   *\n   * @return {boolean|string}\n   *         The current value of autoplay when getting\n   */\n  ;\n\n  _proto.autoplay = function autoplay(value) {\n    // getter usage\n    if (value === undefined) {\n      return this.options_.autoplay || false;\n    }\n\n    var techAutoplay; // if the value is a valid string set it to that, or normalize `true` to 'play', if need be\n\n    if (typeof value === 'string' && /(any|play|muted)/.test(value) || value === true && this.options_.normalizeAutoplay) {\n      this.options_.autoplay = value;\n      this.manualAutoplay_(typeof value === 'string' ? value : 'play');\n      techAutoplay = false; // any falsy value sets autoplay to false in the browser,\n      // lets do the same\n    } else if (!value) {\n      this.options_.autoplay = false; // any other value (ie truthy) sets autoplay to true\n    } else {\n      this.options_.autoplay = true;\n    }\n\n    techAutoplay = typeof techAutoplay === 'undefined' ? this.options_.autoplay : techAutoplay; // if we don't have a tech then we do not queue up\n    // a setAutoplay call on tech ready. We do this because the\n    // autoplay option will be passed in the constructor and we\n    // do not need to set it twice\n\n    if (this.tech_) {\n      this.techCall_('setAutoplay', techAutoplay);\n    }\n  }\n  /**\n   * Set or unset the playsinline attribute.\n   * Playsinline tells the browser that non-fullscreen playback is preferred.\n   *\n   * @param {boolean} [value]\n   *        - true means that we should try to play inline by default\n   *        - false means that we should use the browser's default playback mode,\n   *          which in most cases is inline. iOS Safari is a notable exception\n   *          and plays fullscreen by default.\n   *\n   * @return {string|Player}\n   *         - the current value of playsinline\n   *         - the player when setting\n   *\n   * @see [Spec]{@link https://html.spec.whatwg.org/#attr-video-playsinline}\n   */\n  ;\n\n  _proto.playsinline = function playsinline(value) {\n    if (value !== undefined) {\n      this.techCall_('setPlaysinline', value);\n      this.options_.playsinline = value;\n      return this;\n    }\n\n    return this.techGet_('playsinline');\n  }\n  /**\n   * Get or set the loop attribute on the video element.\n   *\n   * @param {boolean} [value]\n   *        - true means that we should loop the video\n   *        - false means that we should not loop the video\n   *\n   * @return {boolean}\n   *         The current value of loop when getting\n   */\n  ;\n\n  _proto.loop = function loop(value) {\n    if (value !== undefined) {\n      this.techCall_('setLoop', value);\n      this.options_.loop = value;\n      return;\n    }\n\n    return this.techGet_('loop');\n  }\n  /**\n   * Get or set the poster image source url\n   *\n   * @fires Player#posterchange\n   *\n   * @param {string} [src]\n   *        Poster image source URL\n   *\n   * @return {string}\n   *         The current value of poster when getting\n   */\n  ;\n\n  _proto.poster = function poster(src) {\n    if (src === undefined) {\n      return this.poster_;\n    } // The correct way to remove a poster is to set as an empty string\n    // other falsey values will throw errors\n\n\n    if (!src) {\n      src = '';\n    }\n\n    if (src === this.poster_) {\n      return;\n    } // update the internal poster variable\n\n\n    this.poster_ = src; // update the tech's poster\n\n    this.techCall_('setPoster', src);\n    this.isPosterFromTech_ = false; // alert components that the poster has been set\n\n    /**\n     * This event fires when the poster image is changed on the player.\n     *\n     * @event Player#posterchange\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('posterchange');\n  }\n  /**\n   * Some techs (e.g. YouTube) can provide a poster source in an\n   * asynchronous way. We want the poster component to use this\n   * poster source so that it covers up the tech's controls.\n   * (YouTube's play button). However we only want to use this\n   * source if the player user hasn't set a poster through\n   * the normal APIs.\n   *\n   * @fires Player#posterchange\n   * @listens Tech#posterchange\n   * @private\n   */\n  ;\n\n  _proto.handleTechPosterChange_ = function handleTechPosterChange_() {\n    if ((!this.poster_ || this.options_.techCanOverridePoster) && this.tech_ && this.tech_.poster) {\n      var newPoster = this.tech_.poster() || '';\n\n      if (newPoster !== this.poster_) {\n        this.poster_ = newPoster;\n        this.isPosterFromTech_ = true; // Let components know the poster has changed\n\n        this.trigger('posterchange');\n      }\n    }\n  }\n  /**\n   * Get or set whether or not the controls are showing.\n   *\n   * @fires Player#controlsenabled\n   *\n   * @param {boolean} [bool]\n   *        - true to turn controls on\n   *        - false to turn controls off\n   *\n   * @return {boolean}\n   *         The current value of controls when getting\n   */\n  ;\n\n  _proto.controls = function controls(bool) {\n    if (bool === undefined) {\n      return !!this.controls_;\n    }\n\n    bool = !!bool; // Don't trigger a change event unless it actually changed\n\n    if (this.controls_ === bool) {\n      return;\n    }\n\n    this.controls_ = bool;\n\n    if (this.usingNativeControls()) {\n      this.techCall_('setControls', bool);\n    }\n\n    if (this.controls_) {\n      this.removeClass('vjs-controls-disabled');\n      this.addClass('vjs-controls-enabled');\n      /**\n       * @event Player#controlsenabled\n       * @type {EventTarget~Event}\n       */\n\n      this.trigger('controlsenabled');\n\n      if (!this.usingNativeControls()) {\n        this.addTechControlsListeners_();\n      }\n    } else {\n      this.removeClass('vjs-controls-enabled');\n      this.addClass('vjs-controls-disabled');\n      /**\n       * @event Player#controlsdisabled\n       * @type {EventTarget~Event}\n       */\n\n      this.trigger('controlsdisabled');\n\n      if (!this.usingNativeControls()) {\n        this.removeTechControlsListeners_();\n      }\n    }\n  }\n  /**\n   * Toggle native controls on/off. Native controls are the controls built into\n   * devices (e.g. default iPhone controls) or other techs\n   * (e.g. Vimeo Controls)\n   * **This should only be set by the current tech, because only the tech knows\n   * if it can support native controls**\n   *\n   * @fires Player#usingnativecontrols\n   * @fires Player#usingcustomcontrols\n   *\n   * @param {boolean} [bool]\n   *        - true to turn native controls on\n   *        - false to turn native controls off\n   *\n   * @return {boolean}\n   *         The current value of native controls when getting\n   */\n  ;\n\n  _proto.usingNativeControls = function usingNativeControls(bool) {\n    if (bool === undefined) {\n      return !!this.usingNativeControls_;\n    }\n\n    bool = !!bool; // Don't trigger a change event unless it actually changed\n\n    if (this.usingNativeControls_ === bool) {\n      return;\n    }\n\n    this.usingNativeControls_ = bool;\n\n    if (this.usingNativeControls_) {\n      this.addClass('vjs-using-native-controls');\n      /**\n       * player is using the native device controls\n       *\n       * @event Player#usingnativecontrols\n       * @type {EventTarget~Event}\n       */\n\n      this.trigger('usingnativecontrols');\n    } else {\n      this.removeClass('vjs-using-native-controls');\n      /**\n       * player is using the custom HTML controls\n       *\n       * @event Player#usingcustomcontrols\n       * @type {EventTarget~Event}\n       */\n\n      this.trigger('usingcustomcontrols');\n    }\n  }\n  /**\n   * Set or get the current MediaError\n   *\n   * @fires Player#error\n   *\n   * @param  {MediaError|string|number} [err]\n   *         A MediaError or a string/number to be turned\n   *         into a MediaError\n   *\n   * @return {MediaError|null}\n   *         The current MediaError when getting (or null)\n   */\n  ;\n\n  _proto.error = function error(err) {\n    var _this18 = this;\n\n    if (err === undefined) {\n      return this.error_ || null;\n    } // allow hooks to modify error object\n\n\n    hooks('beforeerror').forEach(function (hookFunction) {\n      var newErr = hookFunction(_this18, err);\n\n      if (!(isObject(newErr) && !Array.isArray(newErr) || typeof newErr === 'string' || typeof newErr === 'number' || newErr === null)) {\n        _this18.log.error('please return a value that MediaError expects in beforeerror hooks');\n\n        return;\n      }\n\n      err = newErr;\n    }); // Suppress the first error message for no compatible source until\n    // user interaction\n\n    if (this.options_.suppressNotSupportedError && err && err.code === 4) {\n      var triggerSuppressedError = function triggerSuppressedError() {\n        this.error(err);\n      };\n\n      this.options_.suppressNotSupportedError = false;\n      this.any(['click', 'touchstart'], triggerSuppressedError);\n      this.one('loadstart', function () {\n        this.off(['click', 'touchstart'], triggerSuppressedError);\n      });\n      return;\n    } // restoring to default\n\n\n    if (err === null) {\n      this.error_ = err;\n      this.removeClass('vjs-error');\n\n      if (this.errorDisplay) {\n        this.errorDisplay.close();\n      }\n\n      return;\n    }\n\n    this.error_ = new MediaError(err); // add the vjs-error classname to the player\n\n    this.addClass('vjs-error'); // log the name of the error type and any message\n    // IE11 logs \"[object object]\" and required you to expand message to see error object\n\n    log$1.error(\"(CODE:\" + this.error_.code + \" \" + MediaError.errorTypes[this.error_.code] + \")\", this.error_.message, this.error_);\n    /**\n     * @event Player#error\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('error'); // notify hooks of the per player error\n\n    hooks('error').forEach(function (hookFunction) {\n      return hookFunction(_this18, _this18.error_);\n    });\n    return;\n  }\n  /**\n   * Report user activity\n   *\n   * @param {Object} event\n   *        Event object\n   */\n  ;\n\n  _proto.reportUserActivity = function reportUserActivity(event) {\n    this.userActivity_ = true;\n  }\n  /**\n   * Get/set if user is active\n   *\n   * @fires Player#useractive\n   * @fires Player#userinactive\n   *\n   * @param {boolean} [bool]\n   *        - true if the user is active\n   *        - false if the user is inactive\n   *\n   * @return {boolean}\n   *         The current value of userActive when getting\n   */\n  ;\n\n  _proto.userActive = function userActive(bool) {\n    if (bool === undefined) {\n      return this.userActive_;\n    }\n\n    bool = !!bool;\n\n    if (bool === this.userActive_) {\n      return;\n    }\n\n    this.userActive_ = bool;\n\n    if (this.userActive_) {\n      this.userActivity_ = true;\n      this.removeClass('vjs-user-inactive');\n      this.addClass('vjs-user-active');\n      /**\n       * @event Player#useractive\n       * @type {EventTarget~Event}\n       */\n\n      this.trigger('useractive');\n      return;\n    } // Chrome/Safari/IE have bugs where when you change the cursor it can\n    // trigger a mousemove event. This causes an issue when you're hiding\n    // the cursor when the user is inactive, and a mousemove signals user\n    // activity. Making it impossible to go into inactive mode. Specifically\n    // this happens in fullscreen when we really need to hide the cursor.\n    //\n    // When this gets resolved in ALL browsers it can be removed\n    // https://code.google.com/p/chromium/issues/detail?id=103041\n\n\n    if (this.tech_) {\n      this.tech_.one('mousemove', function (e) {\n        e.stopPropagation();\n        e.preventDefault();\n      });\n    }\n\n    this.userActivity_ = false;\n    this.removeClass('vjs-user-active');\n    this.addClass('vjs-user-inactive');\n    /**\n     * @event Player#userinactive\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('userinactive');\n  }\n  /**\n   * Listen for user activity based on timeout value\n   *\n   * @private\n   */\n  ;\n\n  _proto.listenForUserActivity_ = function listenForUserActivity_() {\n    var mouseInProgress;\n    var lastMoveX;\n    var lastMoveY;\n    var handleActivity = bind(this, this.reportUserActivity);\n\n    var handleMouseMove = function handleMouseMove(e) {\n      // #1068 - Prevent mousemove spamming\n      // Chrome Bug: https://code.google.com/p/chromium/issues/detail?id=366970\n      if (e.screenX !== lastMoveX || e.screenY !== lastMoveY) {\n        lastMoveX = e.screenX;\n        lastMoveY = e.screenY;\n        handleActivity();\n      }\n    };\n\n    var handleMouseDown = function handleMouseDown() {\n      handleActivity(); // For as long as the they are touching the device or have their mouse down,\n      // we consider them active even if they're not moving their finger or mouse.\n      // So we want to continue to update that they are active\n\n      this.clearInterval(mouseInProgress); // Setting userActivity=true now and setting the interval to the same time\n      // as the activityCheck interval (250) should ensure we never miss the\n      // next activityCheck\n\n      mouseInProgress = this.setInterval(handleActivity, 250);\n    };\n\n    var handleMouseUpAndMouseLeave = function handleMouseUpAndMouseLeave(event) {\n      handleActivity(); // Stop the interval that maintains activity if the mouse/touch is down\n\n      this.clearInterval(mouseInProgress);\n    }; // Any mouse movement will be considered user activity\n\n\n    this.on('mousedown', handleMouseDown);\n    this.on('mousemove', handleMouseMove);\n    this.on('mouseup', handleMouseUpAndMouseLeave);\n    this.on('mouseleave', handleMouseUpAndMouseLeave);\n    var controlBar = this.getChild('controlBar'); // Fixes bug on Android & iOS where when tapping progressBar (when control bar is displayed)\n    // controlBar would no longer be hidden by default timeout.\n\n    if (controlBar && !IS_IOS && !IS_ANDROID) {\n      controlBar.on('mouseenter', function (event) {\n        if (this.player().options_.inactivityTimeout !== 0) {\n          this.player().cache_.inactivityTimeout = this.player().options_.inactivityTimeout;\n        }\n\n        this.player().options_.inactivityTimeout = 0;\n      });\n      controlBar.on('mouseleave', function (event) {\n        this.player().options_.inactivityTimeout = this.player().cache_.inactivityTimeout;\n      });\n    } // Listen for keyboard navigation\n    // Shouldn't need to use inProgress interval because of key repeat\n\n\n    this.on('keydown', handleActivity);\n    this.on('keyup', handleActivity); // Run an interval every 250 milliseconds instead of stuffing everything into\n    // the mousemove/touchmove function itself, to prevent performance degradation.\n    // `this.reportUserActivity` simply sets this.userActivity_ to true, which\n    // then gets picked up by this loop\n    // http://ejohn.org/blog/learning-from-twitter/\n\n    var inactivityTimeout;\n    this.setInterval(function () {\n      // Check to see if mouse/touch activity has happened\n      if (!this.userActivity_) {\n        return;\n      } // Reset the activity tracker\n\n\n      this.userActivity_ = false; // If the user state was inactive, set the state to active\n\n      this.userActive(true); // Clear any existing inactivity timeout to start the timer over\n\n      this.clearTimeout(inactivityTimeout);\n      var timeout = this.options_.inactivityTimeout;\n\n      if (timeout <= 0) {\n        return;\n      } // In <timeout> milliseconds, if no more activity has occurred the\n      // user will be considered inactive\n\n\n      inactivityTimeout = this.setTimeout(function () {\n        // Protect against the case where the inactivityTimeout can trigger just\n        // before the next user activity is picked up by the activity check loop\n        // causing a flicker\n        if (!this.userActivity_) {\n          this.userActive(false);\n        }\n      }, timeout);\n    }, 250);\n  }\n  /**\n   * Gets or sets the current playback rate. A playback rate of\n   * 1.0 represents normal speed and 0.5 would indicate half-speed\n   * playback, for instance.\n   *\n   * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-playbackrate\n   *\n   * @param {number} [rate]\n   *       New playback rate to set.\n   *\n   * @return {number}\n   *         The current playback rate when getting or 1.0\n   */\n  ;\n\n  _proto.playbackRate = function playbackRate(rate) {\n    if (rate !== undefined) {\n      // NOTE: this.cache_.lastPlaybackRate is set from the tech handler\n      // that is registered above\n      this.techCall_('setPlaybackRate', rate);\n      return;\n    }\n\n    if (this.tech_ && this.tech_.featuresPlaybackRate) {\n      return this.cache_.lastPlaybackRate || this.techGet_('playbackRate');\n    }\n\n    return 1.0;\n  }\n  /**\n   * Gets or sets the current default playback rate. A default playback rate of\n   * 1.0 represents normal speed and 0.5 would indicate half-speed playback, for instance.\n   * defaultPlaybackRate will only represent what the initial playbackRate of a video was, not\n   * not the current playbackRate.\n   *\n   * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-defaultplaybackrate\n   *\n   * @param {number} [rate]\n   *       New default playback rate to set.\n   *\n   * @return {number|Player}\n   *         - The default playback rate when getting or 1.0\n   *         - the player when setting\n   */\n  ;\n\n  _proto.defaultPlaybackRate = function defaultPlaybackRate(rate) {\n    if (rate !== undefined) {\n      return this.techCall_('setDefaultPlaybackRate', rate);\n    }\n\n    if (this.tech_ && this.tech_.featuresPlaybackRate) {\n      return this.techGet_('defaultPlaybackRate');\n    }\n\n    return 1.0;\n  }\n  /**\n   * Gets or sets the audio flag\n   *\n   * @param {boolean} bool\n   *        - true signals that this is an audio player\n   *        - false signals that this is not an audio player\n   *\n   * @return {boolean}\n   *         The current value of isAudio when getting\n   */\n  ;\n\n  _proto.isAudio = function isAudio(bool) {\n    if (bool !== undefined) {\n      this.isAudio_ = !!bool;\n      return;\n    }\n\n    return !!this.isAudio_;\n  }\n  /**\n   * A helper method for adding a {@link TextTrack} to our\n   * {@link TextTrackList}.\n   *\n   * In addition to the W3C settings we allow adding additional info through options.\n   *\n   * @see http://www.w3.org/html/wg/drafts/html/master/embedded-content-0.html#dom-media-addtexttrack\n   *\n   * @param {string} [kind]\n   *        the kind of TextTrack you are adding\n   *\n   * @param {string} [label]\n   *        the label to give the TextTrack label\n   *\n   * @param {string} [language]\n   *        the language to set on the TextTrack\n   *\n   * @return {TextTrack|undefined}\n   *         the TextTrack that was added or undefined\n   *         if there is no tech\n   */\n  ;\n\n  _proto.addTextTrack = function addTextTrack(kind, label, language) {\n    if (this.tech_) {\n      return this.tech_.addTextTrack(kind, label, language);\n    }\n  }\n  /**\n   * Create a remote {@link TextTrack} and an {@link HTMLTrackElement}.\n   * When manualCleanup is set to false, the track will be automatically removed\n   * on source changes.\n   *\n   * @param {Object} options\n   *        Options to pass to {@link HTMLTrackElement} during creation. See\n   *        {@link HTMLTrackElement} for object properties that you should use.\n   *\n   * @param {boolean} [manualCleanup=true] if set to false, the TextTrack will be\n   *                                       removed on a source change\n   *\n   * @return {HtmlTrackElement}\n   *         the HTMLTrackElement that was created and added\n   *         to the HtmlTrackElementList and the remote\n   *         TextTrackList\n   *\n   * @deprecated The default value of the \"manualCleanup\" parameter will default\n   *             to \"false\" in upcoming versions of Video.js\n   */\n  ;\n\n  _proto.addRemoteTextTrack = function addRemoteTextTrack(options, manualCleanup) {\n    if (this.tech_) {\n      return this.tech_.addRemoteTextTrack(options, manualCleanup);\n    }\n  }\n  /**\n   * Remove a remote {@link TextTrack} from the respective\n   * {@link TextTrackList} and {@link HtmlTrackElementList}.\n   *\n   * @param {Object} track\n   *        Remote {@link TextTrack} to remove\n   *\n   * @return {undefined}\n   *         does not return anything\n   */\n  ;\n\n  _proto.removeRemoteTextTrack = function removeRemoteTextTrack(obj) {\n    if (obj === void 0) {\n      obj = {};\n    }\n\n    var _obj = obj,\n        track = _obj.track;\n\n    if (!track) {\n      track = obj;\n    } // destructure the input into an object with a track argument, defaulting to arguments[0]\n    // default the whole argument to an empty object if nothing was passed in\n\n\n    if (this.tech_) {\n      return this.tech_.removeRemoteTextTrack(track);\n    }\n  }\n  /**\n   * Gets available media playback quality metrics as specified by the W3C's Media\n   * Playback Quality API.\n   *\n   * @see [Spec]{@link https://wicg.github.io/media-playback-quality}\n   *\n   * @return {Object|undefined}\n   *         An object with supported media playback quality metrics or undefined if there\n   *         is no tech or the tech does not support it.\n   */\n  ;\n\n  _proto.getVideoPlaybackQuality = function getVideoPlaybackQuality() {\n    return this.techGet_('getVideoPlaybackQuality');\n  }\n  /**\n   * Get video width\n   *\n   * @return {number}\n   *         current video width\n   */\n  ;\n\n  _proto.videoWidth = function videoWidth() {\n    return this.tech_ && this.tech_.videoWidth && this.tech_.videoWidth() || 0;\n  }\n  /**\n   * Get video height\n   *\n   * @return {number}\n   *         current video height\n   */\n  ;\n\n  _proto.videoHeight = function videoHeight() {\n    return this.tech_ && this.tech_.videoHeight && this.tech_.videoHeight() || 0;\n  }\n  /**\n   * The player's language code.\n   *\n   * Changing the langauge will trigger\n   * [languagechange]{@link Player#event:languagechange}\n   * which Components can use to update control text.\n   * ClickableComponent will update its control text by default on\n   * [languagechange]{@link Player#event:languagechange}.\n   *\n   * @fires Player#languagechange\n   *\n   * @param {string} [code]\n   *        the language code to set the player to\n   *\n   * @return {string}\n   *         The current language code when getting\n   */\n  ;\n\n  _proto.language = function language(code) {\n    if (code === undefined) {\n      return this.language_;\n    }\n\n    if (this.language_ !== String(code).toLowerCase()) {\n      this.language_ = String(code).toLowerCase(); // during first init, it's possible some things won't be evented\n\n      if (isEvented(this)) {\n        /**\n        * fires when the player language change\n        *\n        * @event Player#languagechange\n        * @type {EventTarget~Event}\n        */\n        this.trigger('languagechange');\n      }\n    }\n  }\n  /**\n   * Get the player's language dictionary\n   * Merge every time, because a newly added plugin might call videojs.addLanguage() at any time\n   * Languages specified directly in the player options have precedence\n   *\n   * @return {Array}\n   *         An array of of supported languages\n   */\n  ;\n\n  _proto.languages = function languages() {\n    return mergeOptions$3(Player.prototype.options_.languages, this.languages_);\n  }\n  /**\n   * returns a JavaScript object reperesenting the current track\n   * information. **DOES not return it as JSON**\n   *\n   * @return {Object}\n   *         Object representing the current of track info\n   */\n  ;\n\n  _proto.toJSON = function toJSON() {\n    var options = mergeOptions$3(this.options_);\n    var tracks = options.tracks;\n    options.tracks = [];\n\n    for (var i = 0; i < tracks.length; i++) {\n      var track = tracks[i]; // deep merge tracks and null out player so no circular references\n\n      track = mergeOptions$3(track);\n      track.player = undefined;\n      options.tracks[i] = track;\n    }\n\n    return options;\n  }\n  /**\n   * Creates a simple modal dialog (an instance of the {@link ModalDialog}\n   * component) that immediately overlays the player with arbitrary\n   * content and removes itself when closed.\n   *\n   * @param {string|Function|Element|Array|null} content\n   *        Same as {@link ModalDialog#content}'s param of the same name.\n   *        The most straight-forward usage is to provide a string or DOM\n   *        element.\n   *\n   * @param {Object} [options]\n   *        Extra options which will be passed on to the {@link ModalDialog}.\n   *\n   * @return {ModalDialog}\n   *         the {@link ModalDialog} that was created\n   */\n  ;\n\n  _proto.createModal = function createModal(content, options) {\n    var _this19 = this;\n\n    options = options || {};\n    options.content = content || '';\n    var modal = new ModalDialog(this, options);\n    this.addChild(modal);\n    modal.on('dispose', function () {\n      _this19.removeChild(modal);\n    });\n    modal.open();\n    return modal;\n  }\n  /**\n   * Change breakpoint classes when the player resizes.\n   *\n   * @private\n   */\n  ;\n\n  _proto.updateCurrentBreakpoint_ = function updateCurrentBreakpoint_() {\n    if (!this.responsive()) {\n      return;\n    }\n\n    var currentBreakpoint = this.currentBreakpoint();\n    var currentWidth = this.currentWidth();\n\n    for (var i = 0; i < BREAKPOINT_ORDER.length; i++) {\n      var candidateBreakpoint = BREAKPOINT_ORDER[i];\n      var maxWidth = this.breakpoints_[candidateBreakpoint];\n\n      if (currentWidth <= maxWidth) {\n        // The current breakpoint did not change, nothing to do.\n        if (currentBreakpoint === candidateBreakpoint) {\n          return;\n        } // Only remove a class if there is a current breakpoint.\n\n\n        if (currentBreakpoint) {\n          this.removeClass(BREAKPOINT_CLASSES[currentBreakpoint]);\n        }\n\n        this.addClass(BREAKPOINT_CLASSES[candidateBreakpoint]);\n        this.breakpoint_ = candidateBreakpoint;\n        break;\n      }\n    }\n  }\n  /**\n   * Removes the current breakpoint.\n   *\n   * @private\n   */\n  ;\n\n  _proto.removeCurrentBreakpoint_ = function removeCurrentBreakpoint_() {\n    var className = this.currentBreakpointClass();\n    this.breakpoint_ = '';\n\n    if (className) {\n      this.removeClass(className);\n    }\n  }\n  /**\n   * Get or set breakpoints on the player.\n   *\n   * Calling this method with an object or `true` will remove any previous\n   * custom breakpoints and start from the defaults again.\n   *\n   * @param  {Object|boolean} [breakpoints]\n   *         If an object is given, it can be used to provide custom\n   *         breakpoints. If `true` is given, will set default breakpoints.\n   *         If this argument is not given, will simply return the current\n   *         breakpoints.\n   *\n   * @param  {number} [breakpoints.tiny]\n   *         The maximum width for the \"vjs-layout-tiny\" class.\n   *\n   * @param  {number} [breakpoints.xsmall]\n   *         The maximum width for the \"vjs-layout-x-small\" class.\n   *\n   * @param  {number} [breakpoints.small]\n   *         The maximum width for the \"vjs-layout-small\" class.\n   *\n   * @param  {number} [breakpoints.medium]\n   *         The maximum width for the \"vjs-layout-medium\" class.\n   *\n   * @param  {number} [breakpoints.large]\n   *         The maximum width for the \"vjs-layout-large\" class.\n   *\n   * @param  {number} [breakpoints.xlarge]\n   *         The maximum width for the \"vjs-layout-x-large\" class.\n   *\n   * @param  {number} [breakpoints.huge]\n   *         The maximum width for the \"vjs-layout-huge\" class.\n   *\n   * @return {Object}\n   *         An object mapping breakpoint names to maximum width values.\n   */\n  ;\n\n  _proto.breakpoints = function breakpoints(_breakpoints) {\n    // Used as a getter.\n    if (_breakpoints === undefined) {\n      return assign(this.breakpoints_);\n    }\n\n    this.breakpoint_ = '';\n    this.breakpoints_ = assign({}, DEFAULT_BREAKPOINTS, _breakpoints); // When breakpoint definitions change, we need to update the currently\n    // selected breakpoint.\n\n    this.updateCurrentBreakpoint_(); // Clone the breakpoints before returning.\n\n    return assign(this.breakpoints_);\n  }\n  /**\n   * Get or set a flag indicating whether or not this player should adjust\n   * its UI based on its dimensions.\n   *\n   * @param  {boolean} value\n   *         Should be `true` if the player should adjust its UI based on its\n   *         dimensions; otherwise, should be `false`.\n   *\n   * @return {boolean}\n   *         Will be `true` if this player should adjust its UI based on its\n   *         dimensions; otherwise, will be `false`.\n   */\n  ;\n\n  _proto.responsive = function responsive(value) {\n    // Used as a getter.\n    if (value === undefined) {\n      return this.responsive_;\n    }\n\n    value = Boolean(value);\n    var current = this.responsive_; // Nothing changed.\n\n    if (value === current) {\n      return;\n    } // The value actually changed, set it.\n\n\n    this.responsive_ = value; // Start listening for breakpoints and set the initial breakpoint if the\n    // player is now responsive.\n\n    if (value) {\n      this.on('playerresize', this.boundUpdateCurrentBreakpoint_);\n      this.updateCurrentBreakpoint_(); // Stop listening for breakpoints if the player is no longer responsive.\n    } else {\n      this.off('playerresize', this.boundUpdateCurrentBreakpoint_);\n      this.removeCurrentBreakpoint_();\n    }\n\n    return value;\n  }\n  /**\n   * Get current breakpoint name, if any.\n   *\n   * @return {string}\n   *         If there is currently a breakpoint set, returns a the key from the\n   *         breakpoints object matching it. Otherwise, returns an empty string.\n   */\n  ;\n\n  _proto.currentBreakpoint = function currentBreakpoint() {\n    return this.breakpoint_;\n  }\n  /**\n   * Get the current breakpoint class name.\n   *\n   * @return {string}\n   *         The matching class name (e.g. `\"vjs-layout-tiny\"` or\n   *         `\"vjs-layout-large\"`) for the current breakpoint. Empty string if\n   *         there is no current breakpoint.\n   */\n  ;\n\n  _proto.currentBreakpointClass = function currentBreakpointClass() {\n    return BREAKPOINT_CLASSES[this.breakpoint_] || '';\n  }\n  /**\n   * An object that describes a single piece of media.\n   *\n   * Properties that are not part of this type description will be retained; so,\n   * this can be viewed as a generic metadata storage mechanism as well.\n   *\n   * @see      {@link https://wicg.github.io/mediasession/#the-mediametadata-interface}\n   * @typedef  {Object} Player~MediaObject\n   *\n   * @property {string} [album]\n   *           Unused, except if this object is passed to the `MediaSession`\n   *           API.\n   *\n   * @property {string} [artist]\n   *           Unused, except if this object is passed to the `MediaSession`\n   *           API.\n   *\n   * @property {Object[]} [artwork]\n   *           Unused, except if this object is passed to the `MediaSession`\n   *           API. If not specified, will be populated via the `poster`, if\n   *           available.\n   *\n   * @property {string} [poster]\n   *           URL to an image that will display before playback.\n   *\n   * @property {Tech~SourceObject|Tech~SourceObject[]|string} [src]\n   *           A single source object, an array of source objects, or a string\n   *           referencing a URL to a media source. It is _highly recommended_\n   *           that an object or array of objects is used here, so that source\n   *           selection algorithms can take the `type` into account.\n   *\n   * @property {string} [title]\n   *           Unused, except if this object is passed to the `MediaSession`\n   *           API.\n   *\n   * @property {Object[]} [textTracks]\n   *           An array of objects to be used to create text tracks, following\n   *           the {@link https://www.w3.org/TR/html50/embedded-content-0.html#the-track-element|native track element format}.\n   *           For ease of removal, these will be created as \"remote\" text\n   *           tracks and set to automatically clean up on source changes.\n   *\n   *           These objects may have properties like `src`, `kind`, `label`,\n   *           and `language`, see {@link Tech#createRemoteTextTrack}.\n   */\n\n  /**\n   * Populate the player using a {@link Player~MediaObject|MediaObject}.\n   *\n   * @param  {Player~MediaObject} media\n   *         A media object.\n   *\n   * @param  {Function} ready\n   *         A callback to be called when the player is ready.\n   */\n  ;\n\n  _proto.loadMedia = function loadMedia(media, ready) {\n    var _this20 = this;\n\n    if (!media || typeof media !== 'object') {\n      return;\n    }\n\n    this.reset(); // Clone the media object so it cannot be mutated from outside.\n\n    this.cache_.media = mergeOptions$3(media);\n    var _this$cache_$media = this.cache_.media,\n        artwork = _this$cache_$media.artwork,\n        poster = _this$cache_$media.poster,\n        src = _this$cache_$media.src,\n        textTracks = _this$cache_$media.textTracks; // If `artwork` is not given, create it using `poster`.\n\n    if (!artwork && poster) {\n      this.cache_.media.artwork = [{\n        src: poster,\n        type: getMimetype(poster)\n      }];\n    }\n\n    if (src) {\n      this.src(src);\n    }\n\n    if (poster) {\n      this.poster(poster);\n    }\n\n    if (Array.isArray(textTracks)) {\n      textTracks.forEach(function (tt) {\n        return _this20.addRemoteTextTrack(tt, false);\n      });\n    }\n\n    this.ready(ready);\n  }\n  /**\n   * Get a clone of the current {@link Player~MediaObject} for this player.\n   *\n   * If the `loadMedia` method has not been used, will attempt to return a\n   * {@link Player~MediaObject} based on the current state of the player.\n   *\n   * @return {Player~MediaObject}\n   */\n  ;\n\n  _proto.getMedia = function getMedia() {\n    if (!this.cache_.media) {\n      var poster = this.poster();\n      var src = this.currentSources();\n      var textTracks = Array.prototype.map.call(this.remoteTextTracks(), function (tt) {\n        return {\n          kind: tt.kind,\n          label: tt.label,\n          language: tt.language,\n          src: tt.src\n        };\n      });\n      var media = {\n        src: src,\n        textTracks: textTracks\n      };\n\n      if (poster) {\n        media.poster = poster;\n        media.artwork = [{\n          src: media.poster,\n          type: getMimetype(media.poster)\n        }];\n      }\n\n      return media;\n    }\n\n    return mergeOptions$3(this.cache_.media);\n  }\n  /**\n   * Gets tag settings\n   *\n   * @param {Element} tag\n   *        The player tag\n   *\n   * @return {Object}\n   *         An object containing all of the settings\n   *         for a player tag\n   */\n  ;\n\n  Player.getTagSettings = function getTagSettings(tag) {\n    var baseOptions = {\n      sources: [],\n      tracks: []\n    };\n    var tagOptions = getAttributes(tag);\n    var dataSetup = tagOptions['data-setup'];\n\n    if (hasClass(tag, 'vjs-fill')) {\n      tagOptions.fill = true;\n    }\n\n    if (hasClass(tag, 'vjs-fluid')) {\n      tagOptions.fluid = true;\n    } // Check if data-setup attr exists.\n\n\n    if (dataSetup !== null) {\n      // Parse options JSON\n      // If empty string, make it a parsable json object.\n      var _safeParseTuple = safeParseTuple(dataSetup || '{}'),\n          err = _safeParseTuple[0],\n          data = _safeParseTuple[1];\n\n      if (err) {\n        log$1.error(err);\n      }\n\n      assign(tagOptions, data);\n    }\n\n    assign(baseOptions, tagOptions); // Get tag children settings\n\n    if (tag.hasChildNodes()) {\n      var children = tag.childNodes;\n\n      for (var i = 0, j = children.length; i < j; i++) {\n        var child = children[i]; // Change case needed: http://ejohn.org/blog/nodename-case-sensitivity/\n\n        var childName = child.nodeName.toLowerCase();\n\n        if (childName === 'source') {\n          baseOptions.sources.push(getAttributes(child));\n        } else if (childName === 'track') {\n          baseOptions.tracks.push(getAttributes(child));\n        }\n      }\n    }\n\n    return baseOptions;\n  }\n  /**\n   * Determine whether or not flexbox is supported\n   *\n   * @return {boolean}\n   *         - true if flexbox is supported\n   *         - false if flexbox is not supported\n   */\n  ;\n\n  _proto.flexNotSupported_ = function flexNotSupported_() {\n    var elem = document.createElement('i'); // Note: We don't actually use flexBasis (or flexOrder), but it's one of the more\n    // common flex features that we can rely on when checking for flex support.\n\n    return !('flexBasis' in elem.style || 'webkitFlexBasis' in elem.style || 'mozFlexBasis' in elem.style || 'msFlexBasis' in elem.style || // IE10-specific (2012 flex spec), available for completeness\n    'msFlexOrder' in elem.style);\n  }\n  /**\n   * Set debug mode to enable/disable logs at info level.\n   *\n   * @param {boolean} enabled\n   * @fires Player#debugon\n   * @fires Player#debugoff\n   */\n  ;\n\n  _proto.debug = function debug(enabled) {\n    if (enabled === undefined) {\n      return this.debugEnabled_;\n    }\n\n    if (enabled) {\n      this.trigger('debugon');\n      this.previousLogLevel_ = this.log.level;\n      this.log.level('debug');\n      this.debugEnabled_ = true;\n    } else {\n      this.trigger('debugoff');\n      this.log.level(this.previousLogLevel_);\n      this.previousLogLevel_ = undefined;\n      this.debugEnabled_ = false;\n    }\n  }\n  /**\n   * Set or get current playback rates.\n   * Takes an array and updates the playback rates menu with the new items.\n   * Pass in an empty array to hide the menu.\n   * Values other than arrays are ignored.\n   *\n   * @fires Player#playbackrateschange\n   * @param {number[]} newRates\n   *                   The new rates that the playback rates menu should update to.\n   *                   An empty array will hide the menu\n   * @return {number[]} When used as a getter will return the current playback rates\n   */\n  ;\n\n  _proto.playbackRates = function playbackRates(newRates) {\n    if (newRates === undefined) {\n      return this.cache_.playbackRates;\n    } // ignore any value that isn't an array\n\n\n    if (!Array.isArray(newRates)) {\n      return;\n    } // ignore any arrays that don't only contain numbers\n\n\n    if (!newRates.every(function (rate) {\n      return typeof rate === 'number';\n    })) {\n      return;\n    }\n\n    this.cache_.playbackRates = newRates;\n    /**\n    * fires when the playback rates in a player are changed\n    *\n    * @event Player#playbackrateschange\n    * @type {EventTarget~Event}\n    */\n\n    this.trigger('playbackrateschange');\n  };\n\n  return Player;\n}(Component$1);\n/**\n * Get the {@link VideoTrackList}\n * @link https://html.spec.whatwg.org/multipage/embedded-content.html#videotracklist\n *\n * @return {VideoTrackList}\n *         the current video track list\n *\n * @method Player.prototype.videoTracks\n */\n\n/**\n * Get the {@link AudioTrackList}\n * @link https://html.spec.whatwg.org/multipage/embedded-content.html#audiotracklist\n *\n * @return {AudioTrackList}\n *         the current audio track list\n *\n * @method Player.prototype.audioTracks\n */\n\n/**\n * Get the {@link TextTrackList}\n *\n * @link http://www.w3.org/html/wg/drafts/html/master/embedded-content-0.html#dom-media-texttracks\n *\n * @return {TextTrackList}\n *         the current text track list\n *\n * @method Player.prototype.textTracks\n */\n\n/**\n * Get the remote {@link TextTrackList}\n *\n * @return {TextTrackList}\n *         The current remote text track list\n *\n * @method Player.prototype.remoteTextTracks\n */\n\n/**\n * Get the remote {@link HtmlTrackElementList} tracks.\n *\n * @return {HtmlTrackElementList}\n *         The current remote text track element list\n *\n * @method Player.prototype.remoteTextTrackEls\n */\n\n\nALL.names.forEach(function (name) {\n  var props = ALL[name];\n\n  Player.prototype[props.getterName] = function () {\n    if (this.tech_) {\n      return this.tech_[props.getterName]();\n    } // if we have not yet loadTech_, we create {video,audio,text}Tracks_\n    // these will be passed to the tech during loading\n\n\n    this[props.privateName] = this[props.privateName] || new props.ListClass();\n    return this[props.privateName];\n  };\n});\n/**\n * Get or set the `Player`'s crossorigin option. For the HTML5 player, this\n * sets the `crossOrigin` property on the `<video>` tag to control the CORS\n * behavior.\n *\n * @see [Video Element Attributes]{@link https://developer.mozilla.org/en-US/docs/Web/HTML/Element/video#attr-crossorigin}\n *\n * @param {string} [value]\n *        The value to set the `Player`'s crossorigin to. If an argument is\n *        given, must be one of `anonymous` or `use-credentials`.\n *\n * @return {string|undefined}\n *         - The current crossorigin value of the `Player` when getting.\n *         - undefined when setting\n */\n\nPlayer.prototype.crossorigin = Player.prototype.crossOrigin;\n/**\n * Global enumeration of players.\n *\n * The keys are the player IDs and the values are either the {@link Player}\n * instance or `null` for disposed players.\n *\n * @type {Object}\n */\n\nPlayer.players = {};\nvar navigator = window$1.navigator;\n/*\n * Player instance options, surfaced using options\n * options = Player.prototype.options_\n * Make changes in options, not here.\n *\n * @type {Object}\n * @private\n */\n\nPlayer.prototype.options_ = {\n  // Default order of fallback technology\n  techOrder: Tech.defaultTechOrder_,\n  html5: {},\n  // default inactivity timeout\n  inactivityTimeout: 2000,\n  // default playback rates\n  playbackRates: [],\n  // Add playback rate selection by adding rates\n  // 'playbackRates': [0.5, 1, 1.5, 2],\n  liveui: false,\n  // Included control sets\n  children: ['mediaLoader', 'posterImage', 'textTrackDisplay', 'loadingSpinner', 'bigPlayButton', 'liveTracker', 'controlBar', 'errorDisplay', 'textTrackSettings', 'resizeManager'],\n  language: navigator && (navigator.languages && navigator.languages[0] || navigator.userLanguage || navigator.language) || 'en',\n  // locales and their language translations\n  languages: {},\n  // Default message to show when a video cannot be played.\n  notSupportedMessage: 'No compatible source was found for this media.',\n  normalizeAutoplay: false,\n  fullscreen: {\n    options: {\n      navigationUI: 'hide'\n    }\n  },\n  breakpoints: {},\n  responsive: false\n};\n[\n/**\n * Returns whether or not the player is in the \"ended\" state.\n *\n * @return {Boolean} True if the player is in the ended state, false if not.\n * @method Player#ended\n */\n'ended',\n/**\n * Returns whether or not the player is in the \"seeking\" state.\n *\n * @return {Boolean} True if the player is in the seeking state, false if not.\n * @method Player#seeking\n */\n'seeking',\n/**\n * Returns the TimeRanges of the media that are currently available\n * for seeking to.\n *\n * @return {TimeRanges} the seekable intervals of the media timeline\n * @method Player#seekable\n */\n'seekable',\n/**\n * Returns the current state of network activity for the element, from\n * the codes in the list below.\n * - NETWORK_EMPTY (numeric value 0)\n *   The element has not yet been initialised. All attributes are in\n *   their initial states.\n * - NETWORK_IDLE (numeric value 1)\n *   The element's resource selection algorithm is active and has\n *   selected a resource, but it is not actually using the network at\n *   this time.\n * - NETWORK_LOADING (numeric value 2)\n *   The user agent is actively trying to download data.\n * - NETWORK_NO_SOURCE (numeric value 3)\n *   The element's resource selection algorithm is active, but it has\n *   not yet found a resource to use.\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#network-states\n * @return {number} the current network activity state\n * @method Player#networkState\n */\n'networkState',\n/**\n * Returns a value that expresses the current state of the element\n * with respect to rendering the current playback position, from the\n * codes in the list below.\n * - HAVE_NOTHING (numeric value 0)\n *   No information regarding the media resource is available.\n * - HAVE_METADATA (numeric value 1)\n *   Enough of the resource has been obtained that the duration of the\n *   resource is available.\n * - HAVE_CURRENT_DATA (numeric value 2)\n *   Data for the immediate current playback position is available.\n * - HAVE_FUTURE_DATA (numeric value 3)\n *   Data for the immediate current playback position is available, as\n *   well as enough data for the user agent to advance the current\n *   playback position in the direction of playback.\n * - HAVE_ENOUGH_DATA (numeric value 4)\n *   The user agent estimates that enough data is available for\n *   playback to proceed uninterrupted.\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-readystate\n * @return {number} the current playback rendering state\n * @method Player#readyState\n */\n'readyState'].forEach(function (fn) {\n  Player.prototype[fn] = function () {\n    return this.techGet_(fn);\n  };\n});\nTECH_EVENTS_RETRIGGER.forEach(function (event) {\n  Player.prototype[\"handleTech\" + toTitleCase$1(event) + \"_\"] = function () {\n    return this.trigger(event);\n  };\n});\n/**\n * Fired when the player has initial duration and dimension information\n *\n * @event Player#loadedmetadata\n * @type {EventTarget~Event}\n */\n\n/**\n * Fired when the player has downloaded data at the current playback position\n *\n * @event Player#loadeddata\n * @type {EventTarget~Event}\n */\n\n/**\n * Fired when the current playback position has changed *\n * During playback this is fired every 15-250 milliseconds, depending on the\n * playback technology in use.\n *\n * @event Player#timeupdate\n * @type {EventTarget~Event}\n */\n\n/**\n * Fired when the volume changes\n *\n * @event Player#volumechange\n * @type {EventTarget~Event}\n */\n\n/**\n * Reports whether or not a player has a plugin available.\n *\n * This does not report whether or not the plugin has ever been initialized\n * on this player. For that, [usingPlugin]{@link Player#usingPlugin}.\n *\n * @method Player#hasPlugin\n * @param  {string}  name\n *         The name of a plugin.\n *\n * @return {boolean}\n *         Whether or not this player has the requested plugin available.\n */\n\n/**\n * Reports whether or not a player is using a plugin by name.\n *\n * For basic plugins, this only reports whether the plugin has _ever_ been\n * initialized on this player.\n *\n * @method Player#usingPlugin\n * @param  {string} name\n *         The name of a plugin.\n *\n * @return {boolean}\n *         Whether or not this player is using the requested plugin.\n */\n\nComponent$1.registerComponent('Player', Player);\n\n/**\n * The base plugin name.\n *\n * @private\n * @constant\n * @type {string}\n */\n\nvar BASE_PLUGIN_NAME = 'plugin';\n/**\n * The key on which a player's active plugins cache is stored.\n *\n * @private\n * @constant\n * @type     {string}\n */\n\nvar PLUGIN_CACHE_KEY = 'activePlugins_';\n/**\n * Stores registered plugins in a private space.\n *\n * @private\n * @type    {Object}\n */\n\nvar pluginStorage = {};\n/**\n * Reports whether or not a plugin has been registered.\n *\n * @private\n * @param   {string} name\n *          The name of a plugin.\n *\n * @return {boolean}\n *          Whether or not the plugin has been registered.\n */\n\nvar pluginExists = function pluginExists(name) {\n  return pluginStorage.hasOwnProperty(name);\n};\n/**\n * Get a single registered plugin by name.\n *\n * @private\n * @param   {string} name\n *          The name of a plugin.\n *\n * @return {Function|undefined}\n *          The plugin (or undefined).\n */\n\n\nvar getPlugin = function getPlugin(name) {\n  return pluginExists(name) ? pluginStorage[name] : undefined;\n};\n/**\n * Marks a plugin as \"active\" on a player.\n *\n * Also, ensures that the player has an object for tracking active plugins.\n *\n * @private\n * @param   {Player} player\n *          A Video.js player instance.\n *\n * @param   {string} name\n *          The name of a plugin.\n */\n\n\nvar markPluginAsActive = function markPluginAsActive(player, name) {\n  player[PLUGIN_CACHE_KEY] = player[PLUGIN_CACHE_KEY] || {};\n  player[PLUGIN_CACHE_KEY][name] = true;\n};\n/**\n * Triggers a pair of plugin setup events.\n *\n * @private\n * @param  {Player} player\n *         A Video.js player instance.\n *\n * @param  {Plugin~PluginEventHash} hash\n *         A plugin event hash.\n *\n * @param  {boolean} [before]\n *         If true, prefixes the event name with \"before\". In other words,\n *         use this to trigger \"beforepluginsetup\" instead of \"pluginsetup\".\n */\n\n\nvar triggerSetupEvent = function triggerSetupEvent(player, hash, before) {\n  var eventName = (before ? 'before' : '') + 'pluginsetup';\n  player.trigger(eventName, hash);\n  player.trigger(eventName + ':' + hash.name, hash);\n};\n/**\n * Takes a basic plugin function and returns a wrapper function which marks\n * on the player that the plugin has been activated.\n *\n * @private\n * @param   {string} name\n *          The name of the plugin.\n *\n * @param   {Function} plugin\n *          The basic plugin.\n *\n * @return {Function}\n *          A wrapper function for the given plugin.\n */\n\n\nvar createBasicPlugin = function createBasicPlugin(name, plugin) {\n  var basicPluginWrapper = function basicPluginWrapper() {\n    // We trigger the \"beforepluginsetup\" and \"pluginsetup\" events on the player\n    // regardless, but we want the hash to be consistent with the hash provided\n    // for advanced plugins.\n    //\n    // The only potentially counter-intuitive thing here is the `instance` in\n    // the \"pluginsetup\" event is the value returned by the `plugin` function.\n    triggerSetupEvent(this, {\n      name: name,\n      plugin: plugin,\n      instance: null\n    }, true);\n    var instance = plugin.apply(this, arguments);\n    markPluginAsActive(this, name);\n    triggerSetupEvent(this, {\n      name: name,\n      plugin: plugin,\n      instance: instance\n    });\n    return instance;\n  };\n\n  Object.keys(plugin).forEach(function (prop) {\n    basicPluginWrapper[prop] = plugin[prop];\n  });\n  return basicPluginWrapper;\n};\n/**\n * Takes a plugin sub-class and returns a factory function for generating\n * instances of it.\n *\n * This factory function will replace itself with an instance of the requested\n * sub-class of Plugin.\n *\n * @private\n * @param   {string} name\n *          The name of the plugin.\n *\n * @param   {Plugin} PluginSubClass\n *          The advanced plugin.\n *\n * @return {Function}\n */\n\n\nvar createPluginFactory = function createPluginFactory(name, PluginSubClass) {\n  // Add a `name` property to the plugin prototype so that each plugin can\n  // refer to itself by name.\n  PluginSubClass.prototype.name = name;\n  return function () {\n    triggerSetupEvent(this, {\n      name: name,\n      plugin: PluginSubClass,\n      instance: null\n    }, true);\n\n    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n      args[_key] = arguments[_key];\n    }\n\n    var instance = _construct(PluginSubClass, [this].concat(args)); // The plugin is replaced by a function that returns the current instance.\n\n\n    this[name] = function () {\n      return instance;\n    };\n\n    triggerSetupEvent(this, instance.getEventHash());\n    return instance;\n  };\n};\n/**\n * Parent class for all advanced plugins.\n *\n * @mixes   module:evented~EventedMixin\n * @mixes   module:stateful~StatefulMixin\n * @fires   Player#beforepluginsetup\n * @fires   Player#beforepluginsetup:$name\n * @fires   Player#pluginsetup\n * @fires   Player#pluginsetup:$name\n * @listens Player#dispose\n * @throws  {Error}\n *          If attempting to instantiate the base {@link Plugin} class\n *          directly instead of via a sub-class.\n */\n\n\nvar Plugin = /*#__PURE__*/function () {\n  /**\n   * Creates an instance of this class.\n   *\n   * Sub-classes should call `super` to ensure plugins are properly initialized.\n   *\n   * @param {Player} player\n   *        A Video.js player instance.\n   */\n  function Plugin(player) {\n    if (this.constructor === Plugin) {\n      throw new Error('Plugin must be sub-classed; not directly instantiated.');\n    }\n\n    this.player = player;\n\n    if (!this.log) {\n      this.log = this.player.log.createLogger(this.name);\n    } // Make this object evented, but remove the added `trigger` method so we\n    // use the prototype version instead.\n\n\n    evented(this);\n    delete this.trigger;\n    stateful(this, this.constructor.defaultState);\n    markPluginAsActive(player, this.name); // Auto-bind the dispose method so we can use it as a listener and unbind\n    // it later easily.\n\n    this.dispose = this.dispose.bind(this); // If the player is disposed, dispose the plugin.\n\n    player.on('dispose', this.dispose);\n  }\n  /**\n   * Get the version of the plugin that was set on <pluginName>.VERSION\n   */\n\n\n  var _proto = Plugin.prototype;\n\n  _proto.version = function version() {\n    return this.constructor.VERSION;\n  }\n  /**\n   * Each event triggered by plugins includes a hash of additional data with\n   * conventional properties.\n   *\n   * This returns that object or mutates an existing hash.\n   *\n   * @param   {Object} [hash={}]\n   *          An object to be used as event an event hash.\n   *\n   * @return {Plugin~PluginEventHash}\n   *          An event hash object with provided properties mixed-in.\n   */\n  ;\n\n  _proto.getEventHash = function getEventHash(hash) {\n    if (hash === void 0) {\n      hash = {};\n    }\n\n    hash.name = this.name;\n    hash.plugin = this.constructor;\n    hash.instance = this;\n    return hash;\n  }\n  /**\n   * Triggers an event on the plugin object and overrides\n   * {@link module:evented~EventedMixin.trigger|EventedMixin.trigger}.\n   *\n   * @param   {string|Object} event\n   *          An event type or an object with a type property.\n   *\n   * @param   {Object} [hash={}]\n   *          Additional data hash to merge with a\n   *          {@link Plugin~PluginEventHash|PluginEventHash}.\n   *\n   * @return {boolean}\n   *          Whether or not default was prevented.\n   */\n  ;\n\n  _proto.trigger = function trigger$1(event, hash) {\n    if (hash === void 0) {\n      hash = {};\n    }\n\n    return trigger(this.eventBusEl_, event, this.getEventHash(hash));\n  }\n  /**\n   * Handles \"statechanged\" events on the plugin. No-op by default, override by\n   * subclassing.\n   *\n   * @abstract\n   * @param    {Event} e\n   *           An event object provided by a \"statechanged\" event.\n   *\n   * @param    {Object} e.changes\n   *           An object describing changes that occurred with the \"statechanged\"\n   *           event.\n   */\n  ;\n\n  _proto.handleStateChanged = function handleStateChanged(e) {}\n  /**\n   * Disposes a plugin.\n   *\n   * Subclasses can override this if they want, but for the sake of safety,\n   * it's probably best to subscribe the \"dispose\" event.\n   *\n   * @fires Plugin#dispose\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    var name = this.name,\n        player = this.player;\n    /**\n     * Signals that a advanced plugin is about to be disposed.\n     *\n     * @event Plugin#dispose\n     * @type  {EventTarget~Event}\n     */\n\n    this.trigger('dispose');\n    this.off();\n    player.off('dispose', this.dispose); // Eliminate any possible sources of leaking memory by clearing up\n    // references between the player and the plugin instance and nulling out\n    // the plugin's state and replacing methods with a function that throws.\n\n    player[PLUGIN_CACHE_KEY][name] = false;\n    this.player = this.state = null; // Finally, replace the plugin name on the player with a new factory\n    // function, so that the plugin is ready to be set up again.\n\n    player[name] = createPluginFactory(name, pluginStorage[name]);\n  }\n  /**\n   * Determines if a plugin is a basic plugin (i.e. not a sub-class of `Plugin`).\n   *\n   * @param   {string|Function} plugin\n   *          If a string, matches the name of a plugin. If a function, will be\n   *          tested directly.\n   *\n   * @return {boolean}\n   *          Whether or not a plugin is a basic plugin.\n   */\n  ;\n\n  Plugin.isBasic = function isBasic(plugin) {\n    var p = typeof plugin === 'string' ? getPlugin(plugin) : plugin;\n    return typeof p === 'function' && !Plugin.prototype.isPrototypeOf(p.prototype);\n  }\n  /**\n   * Register a Video.js plugin.\n   *\n   * @param   {string} name\n   *          The name of the plugin to be registered. Must be a string and\n   *          must not match an existing plugin or a method on the `Player`\n   *          prototype.\n   *\n   * @param   {Function} plugin\n   *          A sub-class of `Plugin` or a function for basic plugins.\n   *\n   * @return {Function}\n   *          For advanced plugins, a factory function for that plugin. For\n   *          basic plugins, a wrapper function that initializes the plugin.\n   */\n  ;\n\n  Plugin.registerPlugin = function registerPlugin(name, plugin) {\n    if (typeof name !== 'string') {\n      throw new Error(\"Illegal plugin name, \\\"\" + name + \"\\\", must be a string, was \" + typeof name + \".\");\n    }\n\n    if (pluginExists(name)) {\n      log$1.warn(\"A plugin named \\\"\" + name + \"\\\" already exists. You may want to avoid re-registering plugins!\");\n    } else if (Player.prototype.hasOwnProperty(name)) {\n      throw new Error(\"Illegal plugin name, \\\"\" + name + \"\\\", cannot share a name with an existing player method!\");\n    }\n\n    if (typeof plugin !== 'function') {\n      throw new Error(\"Illegal plugin for \\\"\" + name + \"\\\", must be a function, was \" + typeof plugin + \".\");\n    }\n\n    pluginStorage[name] = plugin; // Add a player prototype method for all sub-classed plugins (but not for\n    // the base Plugin class).\n\n    if (name !== BASE_PLUGIN_NAME) {\n      if (Plugin.isBasic(plugin)) {\n        Player.prototype[name] = createBasicPlugin(name, plugin);\n      } else {\n        Player.prototype[name] = createPluginFactory(name, plugin);\n      }\n    }\n\n    return plugin;\n  }\n  /**\n   * De-register a Video.js plugin.\n   *\n   * @param  {string} name\n   *         The name of the plugin to be de-registered. Must be a string that\n   *         matches an existing plugin.\n   *\n   * @throws {Error}\n   *         If an attempt is made to de-register the base plugin.\n   */\n  ;\n\n  Plugin.deregisterPlugin = function deregisterPlugin(name) {\n    if (name === BASE_PLUGIN_NAME) {\n      throw new Error('Cannot de-register base plugin.');\n    }\n\n    if (pluginExists(name)) {\n      delete pluginStorage[name];\n      delete Player.prototype[name];\n    }\n  }\n  /**\n   * Gets an object containing multiple Video.js plugins.\n   *\n   * @param   {Array} [names]\n   *          If provided, should be an array of plugin names. Defaults to _all_\n   *          plugin names.\n   *\n   * @return {Object|undefined}\n   *          An object containing plugin(s) associated with their name(s) or\n   *          `undefined` if no matching plugins exist).\n   */\n  ;\n\n  Plugin.getPlugins = function getPlugins(names) {\n    if (names === void 0) {\n      names = Object.keys(pluginStorage);\n    }\n\n    var result;\n    names.forEach(function (name) {\n      var plugin = getPlugin(name);\n\n      if (plugin) {\n        result = result || {};\n        result[name] = plugin;\n      }\n    });\n    return result;\n  }\n  /**\n   * Gets a plugin's version, if available\n   *\n   * @param   {string} name\n   *          The name of a plugin.\n   *\n   * @return {string}\n   *          The plugin's version or an empty string.\n   */\n  ;\n\n  Plugin.getPluginVersion = function getPluginVersion(name) {\n    var plugin = getPlugin(name);\n    return plugin && plugin.VERSION || '';\n  };\n\n  return Plugin;\n}();\n/**\n * Gets a plugin by name if it exists.\n *\n * @static\n * @method   getPlugin\n * @memberOf Plugin\n * @param    {string} name\n *           The name of a plugin.\n *\n * @returns  {Function|undefined}\n *           The plugin (or `undefined`).\n */\n\n\nPlugin.getPlugin = getPlugin;\n/**\n * The name of the base plugin class as it is registered.\n *\n * @type {string}\n */\n\nPlugin.BASE_PLUGIN_NAME = BASE_PLUGIN_NAME;\nPlugin.registerPlugin(BASE_PLUGIN_NAME, Plugin);\n/**\n * Documented in player.js\n *\n * @ignore\n */\n\nPlayer.prototype.usingPlugin = function (name) {\n  return !!this[PLUGIN_CACHE_KEY] && this[PLUGIN_CACHE_KEY][name] === true;\n};\n/**\n * Documented in player.js\n *\n * @ignore\n */\n\n\nPlayer.prototype.hasPlugin = function (name) {\n  return !!pluginExists(name);\n};\n/**\n * Signals that a plugin is about to be set up on a player.\n *\n * @event    Player#beforepluginsetup\n * @type     {Plugin~PluginEventHash}\n */\n\n/**\n * Signals that a plugin is about to be set up on a player - by name. The name\n * is the name of the plugin.\n *\n * @event    Player#beforepluginsetup:$name\n * @type     {Plugin~PluginEventHash}\n */\n\n/**\n * Signals that a plugin has just been set up on a player.\n *\n * @event    Player#pluginsetup\n * @type     {Plugin~PluginEventHash}\n */\n\n/**\n * Signals that a plugin has just been set up on a player - by name. The name\n * is the name of the plugin.\n *\n * @event    Player#pluginsetup:$name\n * @type     {Plugin~PluginEventHash}\n */\n\n/**\n * @typedef  {Object} Plugin~PluginEventHash\n *\n * @property {string} instance\n *           For basic plugins, the return value of the plugin function. For\n *           advanced plugins, the plugin instance on which the event is fired.\n *\n * @property {string} name\n *           The name of the plugin.\n *\n * @property {string} plugin\n *           For basic plugins, the plugin function. For advanced plugins, the\n *           plugin class/constructor.\n */\n\n/**\n * @file extend.js\n * @module extend\n */\n/**\n * Used to subclass an existing class by emulating ES subclassing using the\n * `extends` keyword.\n *\n * @function\n * @example\n * var MyComponent = videojs.extend(videojs.getComponent('Component'), {\n *   myCustomMethod: function() {\n *     // Do things in my method.\n *   }\n * });\n *\n * @param    {Function} superClass\n *           The class to inherit from\n *\n * @param    {Object}   [subClassMethods={}]\n *           Methods of the new class\n *\n * @return   {Function}\n *           The new class with subClassMethods that inherited superClass.\n */\n\nvar extend = function extend(superClass, subClassMethods) {\n  if (subClassMethods === void 0) {\n    subClassMethods = {};\n  }\n\n  var subClass = function subClass() {\n    superClass.apply(this, arguments);\n  };\n\n  var methods = {};\n\n  if (typeof subClassMethods === 'object') {\n    if (subClassMethods.constructor !== Object.prototype.constructor) {\n      subClass = subClassMethods.constructor;\n    }\n\n    methods = subClassMethods;\n  } else if (typeof subClassMethods === 'function') {\n    subClass = subClassMethods;\n  }\n\n  _inherits(subClass, superClass); // this is needed for backward-compatibility and node compatibility.\n\n\n  if (superClass) {\n    subClass.super_ = superClass;\n  } // Extend subObj's prototype with functions and other properties from props\n\n\n  for (var name in methods) {\n    if (methods.hasOwnProperty(name)) {\n      subClass.prototype[name] = methods[name];\n    }\n  }\n\n  return subClass;\n};\n\n/**\n * @file video.js\n * @module videojs\n */\n/**\n * Normalize an `id` value by trimming off a leading `#`\n *\n * @private\n * @param   {string} id\n *          A string, maybe with a leading `#`.\n *\n * @return {string}\n *          The string, without any leading `#`.\n */\n\nvar normalizeId = function normalizeId(id) {\n  return id.indexOf('#') === 0 ? id.slice(1) : id;\n};\n/**\n * The `videojs()` function doubles as the main function for users to create a\n * {@link Player} instance as well as the main library namespace.\n *\n * It can also be used as a getter for a pre-existing {@link Player} instance.\n * However, we _strongly_ recommend using `videojs.getPlayer()` for this\n * purpose because it avoids any potential for unintended initialization.\n *\n * Due to [limitations](https://github.com/jsdoc3/jsdoc/issues/955#issuecomment-313829149)\n * of our JSDoc template, we cannot properly document this as both a function\n * and a namespace, so its function signature is documented here.\n *\n * #### Arguments\n * ##### id\n * string|Element, **required**\n *\n * Video element or video element ID.\n *\n * ##### options\n * Object, optional\n *\n * Options object for providing settings.\n * See: [Options Guide](https://docs.videojs.com/tutorial-options.html).\n *\n * ##### ready\n * {@link Component~ReadyCallback}, optional\n *\n * A function to be called when the {@link Player} and {@link Tech} are ready.\n *\n * #### Return Value\n *\n * The `videojs()` function returns a {@link Player} instance.\n *\n * @namespace\n *\n * @borrows AudioTrack as AudioTrack\n * @borrows Component.getComponent as getComponent\n * @borrows module:computed-style~computedStyle as computedStyle\n * @borrows module:events.on as on\n * @borrows module:events.one as one\n * @borrows module:events.off as off\n * @borrows module:events.trigger as trigger\n * @borrows EventTarget as EventTarget\n * @borrows module:extend~extend as extend\n * @borrows module:fn.bind as bind\n * @borrows module:format-time.formatTime as formatTime\n * @borrows module:format-time.resetFormatTime as resetFormatTime\n * @borrows module:format-time.setFormatTime as setFormatTime\n * @borrows module:merge-options.mergeOptions as mergeOptions\n * @borrows module:middleware.use as use\n * @borrows Player.players as players\n * @borrows Plugin.registerPlugin as registerPlugin\n * @borrows Plugin.deregisterPlugin as deregisterPlugin\n * @borrows Plugin.getPlugins as getPlugins\n * @borrows Plugin.getPlugin as getPlugin\n * @borrows Plugin.getPluginVersion as getPluginVersion\n * @borrows Tech.getTech as getTech\n * @borrows Tech.registerTech as registerTech\n * @borrows TextTrack as TextTrack\n * @borrows module:time-ranges.createTimeRanges as createTimeRange\n * @borrows module:time-ranges.createTimeRanges as createTimeRanges\n * @borrows module:url.isCrossOrigin as isCrossOrigin\n * @borrows module:url.parseUrl as parseUrl\n * @borrows VideoTrack as VideoTrack\n *\n * @param  {string|Element} id\n *         Video element or video element ID.\n *\n * @param  {Object} [options]\n *         Options object for providing settings.\n *         See: [Options Guide](https://docs.videojs.com/tutorial-options.html).\n *\n * @param  {Component~ReadyCallback} [ready]\n *         A function to be called when the {@link Player} and {@link Tech} are\n *         ready.\n *\n * @return {Player}\n *         The `videojs()` function returns a {@link Player|Player} instance.\n */\n\n\nfunction videojs(id, options, ready) {\n  var player = videojs.getPlayer(id);\n\n  if (player) {\n    if (options) {\n      log$1.warn(\"Player \\\"\" + id + \"\\\" is already initialised. Options will not be applied.\");\n    }\n\n    if (ready) {\n      player.ready(ready);\n    }\n\n    return player;\n  }\n\n  var el = typeof id === 'string' ? $('#' + normalizeId(id)) : id;\n\n  if (!isEl(el)) {\n    throw new TypeError('The element or ID supplied is not valid. (videojs)');\n  } // document.body.contains(el) will only check if el is contained within that one document.\n  // This causes problems for elements in iframes.\n  // Instead, use the element's ownerDocument instead of the global document.\n  // This will make sure that the element is indeed in the dom of that document.\n  // Additionally, check that the document in question has a default view.\n  // If the document is no longer attached to the dom, the defaultView of the document will be null.\n\n\n  if (!el.ownerDocument.defaultView || !el.ownerDocument.body.contains(el)) {\n    log$1.warn('The element supplied is not included in the DOM');\n  }\n\n  options = options || {};\n  hooks('beforesetup').forEach(function (hookFunction) {\n    var opts = hookFunction(el, mergeOptions$3(options));\n\n    if (!isObject(opts) || Array.isArray(opts)) {\n      log$1.error('please return an object in beforesetup hooks');\n      return;\n    }\n\n    options = mergeOptions$3(options, opts);\n  }); // We get the current \"Player\" component here in case an integration has\n  // replaced it with a custom player.\n\n  var PlayerComponent = Component$1.getComponent('Player');\n  player = new PlayerComponent(el, options, ready);\n  hooks('setup').forEach(function (hookFunction) {\n    return hookFunction(player);\n  });\n  return player;\n}\n\nvideojs.hooks_ = hooks_;\nvideojs.hooks = hooks;\nvideojs.hook = hook;\nvideojs.hookOnce = hookOnce;\nvideojs.removeHook = removeHook; // Add default styles\n\nif (window$1.VIDEOJS_NO_DYNAMIC_STYLE !== true && isReal()) {\n  var style = $('.vjs-styles-defaults');\n\n  if (!style) {\n    style = createStyleElement('vjs-styles-defaults');\n    var head = $('head');\n\n    if (head) {\n      head.insertBefore(style, head.firstChild);\n    }\n\n    setTextContent(style, \"\\n      .video-js {\\n        width: 300px;\\n        height: 150px;\\n      }\\n\\n      .vjs-fluid {\\n        padding-top: 56.25%\\n      }\\n    \");\n  }\n} // Run Auto-load players\n// You have to wait at least once in case this script is loaded after your\n// video in the DOM (weird behavior only with minified version)\n\n\nautoSetupTimeout(1, videojs);\n/**\n * Current Video.js version. Follows [semantic versioning](https://semver.org/).\n *\n * @type {string}\n */\n\nvideojs.VERSION = version$5;\n/**\n * The global options object. These are the settings that take effect\n * if no overrides are specified when the player is created.\n *\n * @type {Object}\n */\n\nvideojs.options = Player.prototype.options_;\n/**\n * Get an object with the currently created players, keyed by player ID\n *\n * @return {Object}\n *         The created players\n */\n\nvideojs.getPlayers = function () {\n  return Player.players;\n};\n/**\n * Get a single player based on an ID or DOM element.\n *\n * This is useful if you want to check if an element or ID has an associated\n * Video.js player, but not create one if it doesn't.\n *\n * @param   {string|Element} id\n *          An HTML element - `<video>`, `<audio>`, or `<video-js>` -\n *          or a string matching the `id` of such an element.\n *\n * @return {Player|undefined}\n *          A player instance or `undefined` if there is no player instance\n *          matching the argument.\n */\n\n\nvideojs.getPlayer = function (id) {\n  var players = Player.players;\n  var tag;\n\n  if (typeof id === 'string') {\n    var nId = normalizeId(id);\n    var player = players[nId];\n\n    if (player) {\n      return player;\n    }\n\n    tag = $('#' + nId);\n  } else {\n    tag = id;\n  }\n\n  if (isEl(tag)) {\n    var _tag = tag,\n        _player = _tag.player,\n        playerId = _tag.playerId; // Element may have a `player` property referring to an already created\n    // player instance. If so, return that.\n\n    if (_player || players[playerId]) {\n      return _player || players[playerId];\n    }\n  }\n};\n/**\n * Returns an array of all current players.\n *\n * @return {Array}\n *         An array of all players. The array will be in the order that\n *         `Object.keys` provides, which could potentially vary between\n *         JavaScript engines.\n *\n */\n\n\nvideojs.getAllPlayers = function () {\n  return (// Disposed players leave a key with a `null` value, so we need to make sure\n    // we filter those out.\n    Object.keys(Player.players).map(function (k) {\n      return Player.players[k];\n    }).filter(Boolean)\n  );\n};\n\nvideojs.players = Player.players;\nvideojs.getComponent = Component$1.getComponent;\n/**\n * Register a component so it can referred to by name. Used when adding to other\n * components, either through addChild `component.addChild('myComponent')` or through\n * default children options  `{ children: ['myComponent'] }`.\n *\n * > NOTE: You could also just initialize the component before adding.\n * `component.addChild(new MyComponent());`\n *\n * @param {string} name\n *        The class name of the component\n *\n * @param {Component} comp\n *        The component class\n *\n * @return {Component}\n *         The newly registered component\n */\n\nvideojs.registerComponent = function (name, comp) {\n  if (Tech.isTech(comp)) {\n    log$1.warn(\"The \" + name + \" tech was registered as a component. It should instead be registered using videojs.registerTech(name, tech)\");\n  }\n\n  Component$1.registerComponent.call(Component$1, name, comp);\n};\n\nvideojs.getTech = Tech.getTech;\nvideojs.registerTech = Tech.registerTech;\nvideojs.use = use;\n/**\n * An object that can be returned by a middleware to signify\n * that the middleware is being terminated.\n *\n * @type {object}\n * @property {object} middleware.TERMINATOR\n */\n\nObject.defineProperty(videojs, 'middleware', {\n  value: {},\n  writeable: false,\n  enumerable: true\n});\nObject.defineProperty(videojs.middleware, 'TERMINATOR', {\n  value: TERMINATOR,\n  writeable: false,\n  enumerable: true\n});\n/**\n * A reference to the {@link module:browser|browser utility module} as an object.\n *\n * @type {Object}\n * @see  {@link module:browser|browser}\n */\n\nvideojs.browser = browser;\n/**\n * Use {@link module:browser.TOUCH_ENABLED|browser.TOUCH_ENABLED} instead; only\n * included for backward-compatibility with 4.x.\n *\n * @deprecated Since version 5.0, use {@link module:browser.TOUCH_ENABLED|browser.TOUCH_ENABLED instead.\n * @type {boolean}\n */\n\nvideojs.TOUCH_ENABLED = TOUCH_ENABLED;\nvideojs.extend = extend;\nvideojs.mergeOptions = mergeOptions$3;\nvideojs.bind = bind;\nvideojs.registerPlugin = Plugin.registerPlugin;\nvideojs.deregisterPlugin = Plugin.deregisterPlugin;\n/**\n * Deprecated method to register a plugin with Video.js\n *\n * @deprecated videojs.plugin() is deprecated; use videojs.registerPlugin() instead\n *\n * @param {string} name\n *        The plugin name\n *\n * @param {Plugin|Function} plugin\n *         The plugin sub-class or function\n */\n\nvideojs.plugin = function (name, plugin) {\n  log$1.warn('videojs.plugin() is deprecated; use videojs.registerPlugin() instead');\n  return Plugin.registerPlugin(name, plugin);\n};\n\nvideojs.getPlugins = Plugin.getPlugins;\nvideojs.getPlugin = Plugin.getPlugin;\nvideojs.getPluginVersion = Plugin.getPluginVersion;\n/**\n * Adding languages so that they're available to all players.\n * Example: `videojs.addLanguage('es', { 'Hello': 'Hola' });`\n *\n * @param {string} code\n *        The language code or dictionary property\n *\n * @param {Object} data\n *        The data values to be translated\n *\n * @return {Object}\n *         The resulting language dictionary object\n */\n\nvideojs.addLanguage = function (code, data) {\n  var _mergeOptions;\n\n  code = ('' + code).toLowerCase();\n  videojs.options.languages = mergeOptions$3(videojs.options.languages, (_mergeOptions = {}, _mergeOptions[code] = data, _mergeOptions));\n  return videojs.options.languages[code];\n};\n/**\n * A reference to the {@link module:log|log utility module} as an object.\n *\n * @type {Function}\n * @see  {@link module:log|log}\n */\n\n\nvideojs.log = log$1;\nvideojs.createLogger = createLogger;\nvideojs.createTimeRange = videojs.createTimeRanges = createTimeRanges;\nvideojs.formatTime = formatTime;\nvideojs.setFormatTime = setFormatTime;\nvideojs.resetFormatTime = resetFormatTime;\nvideojs.parseUrl = parseUrl;\nvideojs.isCrossOrigin = isCrossOrigin;\nvideojs.EventTarget = EventTarget$2;\nvideojs.on = on;\nvideojs.one = one;\nvideojs.off = off;\nvideojs.trigger = trigger;\n/**\n * A cross-browser XMLHttpRequest wrapper.\n *\n * @function\n * @param    {Object} options\n *           Settings for the request.\n *\n * @return   {XMLHttpRequest|XDomainRequest}\n *           The request object.\n *\n * @see      https://github.com/Raynos/xhr\n */\n\nvideojs.xhr = XHR;\nvideojs.TextTrack = TextTrack;\nvideojs.AudioTrack = AudioTrack;\nvideojs.VideoTrack = VideoTrack;\n['isEl', 'isTextNode', 'createEl', 'hasClass', 'addClass', 'removeClass', 'toggleClass', 'setAttributes', 'getAttributes', 'emptyEl', 'appendContent', 'insertContent'].forEach(function (k) {\n  videojs[k] = function () {\n    log$1.warn(\"videojs.\" + k + \"() is deprecated; use videojs.dom.\" + k + \"() instead\");\n    return Dom[k].apply(null, arguments);\n  };\n});\nvideojs.computedStyle = computedStyle;\n/**\n * A reference to the {@link module:dom|DOM utility module} as an object.\n *\n * @type {Object}\n * @see  {@link module:dom|dom}\n */\n\nvideojs.dom = Dom;\n/**\n * A reference to the {@link module:url|URL utility module} as an object.\n *\n * @type {Object}\n * @see  {@link module:url|url}\n */\n\nvideojs.url = Url;\nvideojs.defineLazyProperty = defineLazyProperty; // Adding less ambiguous text for fullscreen button.\n// In a major update this could become the default text and key.\n\nvideojs.addLanguage('en', {\n  'Non-Fullscreen': 'Exit Fullscreen'\n});\n\n/*! @name @videojs/http-streaming @version 2.13.1 @license Apache-2.0 */\n/**\n * @file resolve-url.js - Handling how URLs are resolved and manipulated\n */\n\nvar resolveUrl = _resolveUrl;\n/**\n * Checks whether xhr request was redirected and returns correct url depending\n * on `handleManifestRedirects` option\n *\n * @api private\n *\n * @param  {string} url - an url being requested\n * @param  {XMLHttpRequest} req - xhr request result\n *\n * @return {string}\n */\n\nvar resolveManifestRedirect = function resolveManifestRedirect(handleManifestRedirect, url, req) {\n  // To understand how the responseURL below is set and generated:\n  // - https://fetch.spec.whatwg.org/#concept-response-url\n  // - https://fetch.spec.whatwg.org/#atomic-http-redirect-handling\n  if (handleManifestRedirect && req && req.responseURL && url !== req.responseURL) {\n    return req.responseURL;\n  }\n\n  return url;\n};\n\nvar logger = function logger(source) {\n  if (videojs.log.debug) {\n    return videojs.log.debug.bind(videojs, 'VHS:', source + \" >\");\n  }\n\n  return function () {};\n};\n/**\n * ranges\n *\n * Utilities for working with TimeRanges.\n *\n */\n\n\nvar TIME_FUDGE_FACTOR = 1 / 30; // Comparisons between time values such as current time and the end of the buffered range\n// can be misleading because of precision differences or when the current media has poorly\n// aligned audio and video, which can cause values to be slightly off from what you would\n// expect. This value is what we consider to be safe to use in such comparisons to account\n// for these scenarios.\n\nvar SAFE_TIME_DELTA = TIME_FUDGE_FACTOR * 3;\n\nvar filterRanges = function filterRanges(timeRanges, predicate) {\n  var results = [];\n  var i;\n\n  if (timeRanges && timeRanges.length) {\n    // Search for ranges that match the predicate\n    for (i = 0; i < timeRanges.length; i++) {\n      if (predicate(timeRanges.start(i), timeRanges.end(i))) {\n        results.push([timeRanges.start(i), timeRanges.end(i)]);\n      }\n    }\n  }\n\n  return videojs.createTimeRanges(results);\n};\n/**\n * Attempts to find the buffered TimeRange that contains the specified\n * time.\n *\n * @param {TimeRanges} buffered - the TimeRanges object to query\n * @param {number} time  - the time to filter on.\n * @return {TimeRanges} a new TimeRanges object\n */\n\n\nvar findRange = function findRange(buffered, time) {\n  return filterRanges(buffered, function (start, end) {\n    return start - SAFE_TIME_DELTA <= time && end + SAFE_TIME_DELTA >= time;\n  });\n};\n/**\n * Returns the TimeRanges that begin later than the specified time.\n *\n * @param {TimeRanges} timeRanges - the TimeRanges object to query\n * @param {number} time - the time to filter on.\n * @return {TimeRanges} a new TimeRanges object.\n */\n\n\nvar findNextRange = function findNextRange(timeRanges, time) {\n  return filterRanges(timeRanges, function (start) {\n    return start - TIME_FUDGE_FACTOR >= time;\n  });\n};\n/**\n * Returns gaps within a list of TimeRanges\n *\n * @param {TimeRanges} buffered - the TimeRanges object\n * @return {TimeRanges} a TimeRanges object of gaps\n */\n\n\nvar findGaps = function findGaps(buffered) {\n  if (buffered.length < 2) {\n    return videojs.createTimeRanges();\n  }\n\n  var ranges = [];\n\n  for (var i = 1; i < buffered.length; i++) {\n    var start = buffered.end(i - 1);\n    var end = buffered.start(i);\n    ranges.push([start, end]);\n  }\n\n  return videojs.createTimeRanges(ranges);\n};\n/**\n * Calculate the intersection of two TimeRanges\n *\n * @param {TimeRanges} bufferA\n * @param {TimeRanges} bufferB\n * @return {TimeRanges} The interesection of `bufferA` with `bufferB`\n */\n\n\nvar bufferIntersection = function bufferIntersection(bufferA, bufferB) {\n  var start = null;\n  var end = null;\n  var arity = 0;\n  var extents = [];\n  var ranges = [];\n\n  if (!bufferA || !bufferA.length || !bufferB || !bufferB.length) {\n    return videojs.createTimeRange();\n  } // Handle the case where we have both buffers and create an\n  // intersection of the two\n\n\n  var count = bufferA.length; // A) Gather up all start and end times\n\n  while (count--) {\n    extents.push({\n      time: bufferA.start(count),\n      type: 'start'\n    });\n    extents.push({\n      time: bufferA.end(count),\n      type: 'end'\n    });\n  }\n\n  count = bufferB.length;\n\n  while (count--) {\n    extents.push({\n      time: bufferB.start(count),\n      type: 'start'\n    });\n    extents.push({\n      time: bufferB.end(count),\n      type: 'end'\n    });\n  } // B) Sort them by time\n\n\n  extents.sort(function (a, b) {\n    return a.time - b.time;\n  }); // C) Go along one by one incrementing arity for start and decrementing\n  //    arity for ends\n\n  for (count = 0; count < extents.length; count++) {\n    if (extents[count].type === 'start') {\n      arity++; // D) If arity is ever incremented to 2 we are entering an\n      //    overlapping range\n\n      if (arity === 2) {\n        start = extents[count].time;\n      }\n    } else if (extents[count].type === 'end') {\n      arity--; // E) If arity is ever decremented to 1 we leaving an\n      //    overlapping range\n\n      if (arity === 1) {\n        end = extents[count].time;\n      }\n    } // F) Record overlapping ranges\n\n\n    if (start !== null && end !== null) {\n      ranges.push([start, end]);\n      start = null;\n      end = null;\n    }\n  }\n\n  return videojs.createTimeRanges(ranges);\n};\n/**\n * Gets a human readable string for a TimeRange\n *\n * @param {TimeRange} range\n * @return {string} a human readable string\n */\n\n\nvar printableRange = function printableRange(range) {\n  var strArr = [];\n\n  if (!range || !range.length) {\n    return '';\n  }\n\n  for (var i = 0; i < range.length; i++) {\n    strArr.push(range.start(i) + ' => ' + range.end(i));\n  }\n\n  return strArr.join(', ');\n};\n/**\n * Calculates the amount of time left in seconds until the player hits the end of the\n * buffer and causes a rebuffer\n *\n * @param {TimeRange} buffered\n *        The state of the buffer\n * @param {Numnber} currentTime\n *        The current time of the player\n * @param {number} playbackRate\n *        The current playback rate of the player. Defaults to 1.\n * @return {number}\n *         Time until the player has to start rebuffering in seconds.\n * @function timeUntilRebuffer\n */\n\n\nvar timeUntilRebuffer = function timeUntilRebuffer(buffered, currentTime, playbackRate) {\n  if (playbackRate === void 0) {\n    playbackRate = 1;\n  }\n\n  var bufferedEnd = buffered.length ? buffered.end(buffered.length - 1) : 0;\n  return (bufferedEnd - currentTime) / playbackRate;\n};\n/**\n * Converts a TimeRanges object into an array representation\n *\n * @param {TimeRanges} timeRanges\n * @return {Array}\n */\n\n\nvar timeRangesToArray = function timeRangesToArray(timeRanges) {\n  var timeRangesList = [];\n\n  for (var i = 0; i < timeRanges.length; i++) {\n    timeRangesList.push({\n      start: timeRanges.start(i),\n      end: timeRanges.end(i)\n    });\n  }\n\n  return timeRangesList;\n};\n/**\n * Determines if two time range objects are different.\n *\n * @param {TimeRange} a\n *        the first time range object to check\n *\n * @param {TimeRange} b\n *        the second time range object to check\n *\n * @return {Boolean}\n *         Whether the time range objects differ\n */\n\n\nvar isRangeDifferent = function isRangeDifferent(a, b) {\n  // same object\n  if (a === b) {\n    return false;\n  } // one or the other is undefined\n\n\n  if (!a && b || !b && a) {\n    return true;\n  } // length is different\n\n\n  if (a.length !== b.length) {\n    return true;\n  } // see if any start/end pair is different\n\n\n  for (var i = 0; i < a.length; i++) {\n    if (a.start(i) !== b.start(i) || a.end(i) !== b.end(i)) {\n      return true;\n    }\n  } // if the length and every pair is the same\n  // this is the same time range\n\n\n  return false;\n};\n\nvar lastBufferedEnd = function lastBufferedEnd(a) {\n  if (!a || !a.length || !a.end) {\n    return;\n  }\n\n  return a.end(a.length - 1);\n};\n/**\n * A utility function to add up the amount of time in a timeRange\n * after a specified startTime.\n * ie:[[0, 10], [20, 40], [50, 60]] with a startTime 0\n *     would return 40 as there are 40s seconds after 0 in the timeRange\n *\n * @param {TimeRange} range\n *        The range to check against\n * @param {number} startTime\n *        The time in the time range that you should start counting from\n *\n * @return {number}\n *          The number of seconds in the buffer passed the specified time.\n */\n\n\nvar timeAheadOf = function timeAheadOf(range, startTime) {\n  var time = 0;\n\n  if (!range || !range.length) {\n    return time;\n  }\n\n  for (var i = 0; i < range.length; i++) {\n    var start = range.start(i);\n    var end = range.end(i); // startTime is after this range entirely\n\n    if (startTime > end) {\n      continue;\n    } // startTime is within this range\n\n\n    if (startTime > start && startTime <= end) {\n      time += end - startTime;\n      continue;\n    } // startTime is before this range.\n\n\n    time += end - start;\n  }\n\n  return time;\n};\n/**\n * @file playlist.js\n *\n * Playlist related utilities.\n */\n\n\nvar createTimeRange = videojs.createTimeRange;\n/**\n * Get the duration of a segment, with special cases for\n * llhls segments that do not have a duration yet.\n *\n * @param {Object} playlist\n *        the playlist that the segment belongs to.\n * @param {Object} segment\n *        the segment to get a duration for.\n *\n * @return {number}\n *          the segment duration\n */\n\nvar segmentDurationWithParts = function segmentDurationWithParts(playlist, segment) {\n  // if this isn't a preload segment\n  // then we will have a segment duration that is accurate.\n  if (!segment.preload) {\n    return segment.duration;\n  } // otherwise we have to add up parts and preload hints\n  // to get an up to date duration.\n\n\n  var result = 0;\n  (segment.parts || []).forEach(function (p) {\n    result += p.duration;\n  }); // for preload hints we have to use partTargetDuration\n  // as they won't even have a duration yet.\n\n  (segment.preloadHints || []).forEach(function (p) {\n    if (p.type === 'PART') {\n      result += playlist.partTargetDuration;\n    }\n  });\n  return result;\n};\n/**\n * A function to get a combined list of parts and segments with durations\n * and indexes.\n *\n * @param {Playlist} playlist the playlist to get the list for.\n *\n * @return {Array} The part/segment list.\n */\n\n\nvar getPartsAndSegments = function getPartsAndSegments(playlist) {\n  return (playlist.segments || []).reduce(function (acc, segment, si) {\n    if (segment.parts) {\n      segment.parts.forEach(function (part, pi) {\n        acc.push({\n          duration: part.duration,\n          segmentIndex: si,\n          partIndex: pi,\n          part: part,\n          segment: segment\n        });\n      });\n    } else {\n      acc.push({\n        duration: segment.duration,\n        segmentIndex: si,\n        partIndex: null,\n        segment: segment,\n        part: null\n      });\n    }\n\n    return acc;\n  }, []);\n};\n\nvar getLastParts = function getLastParts(media) {\n  var lastSegment = media.segments && media.segments.length && media.segments[media.segments.length - 1];\n  return lastSegment && lastSegment.parts || [];\n};\n\nvar getKnownPartCount = function getKnownPartCount(_ref) {\n  var preloadSegment = _ref.preloadSegment;\n\n  if (!preloadSegment) {\n    return;\n  }\n\n  var parts = preloadSegment.parts,\n      preloadHints = preloadSegment.preloadHints;\n  var partCount = (preloadHints || []).reduce(function (count, hint) {\n    return count + (hint.type === 'PART' ? 1 : 0);\n  }, 0);\n  partCount += parts && parts.length ? parts.length : 0;\n  return partCount;\n};\n/**\n * Get the number of seconds to delay from the end of a\n * live playlist.\n *\n * @param {Playlist} master the master playlist\n * @param {Playlist} media the media playlist\n * @return {number} the hold back in seconds.\n */\n\n\nvar liveEdgeDelay = function liveEdgeDelay(master, media) {\n  if (media.endList) {\n    return 0;\n  } // dash suggestedPresentationDelay trumps everything\n\n\n  if (master && master.suggestedPresentationDelay) {\n    return master.suggestedPresentationDelay;\n  }\n\n  var hasParts = getLastParts(media).length > 0; // look for \"part\" delays from ll-hls first\n\n  if (hasParts && media.serverControl && media.serverControl.partHoldBack) {\n    return media.serverControl.partHoldBack;\n  } else if (hasParts && media.partTargetDuration) {\n    return media.partTargetDuration * 3; // finally look for full segment delays\n  } else if (media.serverControl && media.serverControl.holdBack) {\n    return media.serverControl.holdBack;\n  } else if (media.targetDuration) {\n    return media.targetDuration * 3;\n  }\n\n  return 0;\n};\n/**\n * walk backward until we find a duration we can use\n * or return a failure\n *\n * @param {Playlist} playlist the playlist to walk through\n * @param {Number} endSequence the mediaSequence to stop walking on\n */\n\n\nvar backwardDuration = function backwardDuration(playlist, endSequence) {\n  var result = 0;\n  var i = endSequence - playlist.mediaSequence; // if a start time is available for segment immediately following\n  // the interval, use it\n\n  var segment = playlist.segments[i]; // Walk backward until we find the latest segment with timeline\n  // information that is earlier than endSequence\n\n  if (segment) {\n    if (typeof segment.start !== 'undefined') {\n      return {\n        result: segment.start,\n        precise: true\n      };\n    }\n\n    if (typeof segment.end !== 'undefined') {\n      return {\n        result: segment.end - segment.duration,\n        precise: true\n      };\n    }\n  }\n\n  while (i--) {\n    segment = playlist.segments[i];\n\n    if (typeof segment.end !== 'undefined') {\n      return {\n        result: result + segment.end,\n        precise: true\n      };\n    }\n\n    result += segmentDurationWithParts(playlist, segment);\n\n    if (typeof segment.start !== 'undefined') {\n      return {\n        result: result + segment.start,\n        precise: true\n      };\n    }\n  }\n\n  return {\n    result: result,\n    precise: false\n  };\n};\n/**\n * walk forward until we find a duration we can use\n * or return a failure\n *\n * @param {Playlist} playlist the playlist to walk through\n * @param {number} endSequence the mediaSequence to stop walking on\n */\n\n\nvar forwardDuration = function forwardDuration(playlist, endSequence) {\n  var result = 0;\n  var segment;\n  var i = endSequence - playlist.mediaSequence; // Walk forward until we find the earliest segment with timeline\n  // information\n\n  for (; i < playlist.segments.length; i++) {\n    segment = playlist.segments[i];\n\n    if (typeof segment.start !== 'undefined') {\n      return {\n        result: segment.start - result,\n        precise: true\n      };\n    }\n\n    result += segmentDurationWithParts(playlist, segment);\n\n    if (typeof segment.end !== 'undefined') {\n      return {\n        result: segment.end - result,\n        precise: true\n      };\n    }\n  } // indicate we didn't find a useful duration estimate\n\n\n  return {\n    result: -1,\n    precise: false\n  };\n};\n/**\n  * Calculate the media duration from the segments associated with a\n  * playlist. The duration of a subinterval of the available segments\n  * may be calculated by specifying an end index.\n  *\n  * @param {Object} playlist a media playlist object\n  * @param {number=} endSequence an exclusive upper boundary\n  * for the playlist.  Defaults to playlist length.\n  * @param {number} expired the amount of time that has dropped\n  * off the front of the playlist in a live scenario\n  * @return {number} the duration between the first available segment\n  * and end index.\n  */\n\n\nvar intervalDuration = function intervalDuration(playlist, endSequence, expired) {\n  if (typeof endSequence === 'undefined') {\n    endSequence = playlist.mediaSequence + playlist.segments.length;\n  }\n\n  if (endSequence < playlist.mediaSequence) {\n    return 0;\n  } // do a backward walk to estimate the duration\n\n\n  var backward = backwardDuration(playlist, endSequence);\n\n  if (backward.precise) {\n    // if we were able to base our duration estimate on timing\n    // information provided directly from the Media Source, return\n    // it\n    return backward.result;\n  } // walk forward to see if a precise duration estimate can be made\n  // that way\n\n\n  var forward = forwardDuration(playlist, endSequence);\n\n  if (forward.precise) {\n    // we found a segment that has been buffered and so it's\n    // position is known precisely\n    return forward.result;\n  } // return the less-precise, playlist-based duration estimate\n\n\n  return backward.result + expired;\n};\n/**\n  * Calculates the duration of a playlist. If a start and end index\n  * are specified, the duration will be for the subset of the media\n  * timeline between those two indices. The total duration for live\n  * playlists is always Infinity.\n  *\n  * @param {Object} playlist a media playlist object\n  * @param {number=} endSequence an exclusive upper\n  * boundary for the playlist. Defaults to the playlist media\n  * sequence number plus its length.\n  * @param {number=} expired the amount of time that has\n  * dropped off the front of the playlist in a live scenario\n  * @return {number} the duration between the start index and end\n  * index.\n  */\n\n\nvar duration = function duration(playlist, endSequence, expired) {\n  if (!playlist) {\n    return 0;\n  }\n\n  if (typeof expired !== 'number') {\n    expired = 0;\n  } // if a slice of the total duration is not requested, use\n  // playlist-level duration indicators when they're present\n\n\n  if (typeof endSequence === 'undefined') {\n    // if present, use the duration specified in the playlist\n    if (playlist.totalDuration) {\n      return playlist.totalDuration;\n    } // duration should be Infinity for live playlists\n\n\n    if (!playlist.endList) {\n      return window$1.Infinity;\n    }\n  } // calculate the total duration based on the segment durations\n\n\n  return intervalDuration(playlist, endSequence, expired);\n};\n/**\n  * Calculate the time between two indexes in the current playlist\n  * neight the start- nor the end-index need to be within the current\n  * playlist in which case, the targetDuration of the playlist is used\n  * to approximate the durations of the segments\n  *\n  * @param {Array} options.durationList list to iterate over for durations.\n  * @param {number} options.defaultDuration duration to use for elements before or after the durationList\n  * @param {number} options.startIndex partsAndSegments index to start\n  * @param {number} options.endIndex partsAndSegments index to end.\n  * @return {number} the number of seconds between startIndex and endIndex\n  */\n\n\nvar sumDurations = function sumDurations(_ref2) {\n  var defaultDuration = _ref2.defaultDuration,\n      durationList = _ref2.durationList,\n      startIndex = _ref2.startIndex,\n      endIndex = _ref2.endIndex;\n  var durations = 0;\n\n  if (startIndex > endIndex) {\n    var _ref3 = [endIndex, startIndex];\n    startIndex = _ref3[0];\n    endIndex = _ref3[1];\n  }\n\n  if (startIndex < 0) {\n    for (var i = startIndex; i < Math.min(0, endIndex); i++) {\n      durations += defaultDuration;\n    }\n\n    startIndex = 0;\n  }\n\n  for (var _i = startIndex; _i < endIndex; _i++) {\n    durations += durationList[_i].duration;\n  }\n\n  return durations;\n};\n/**\n * Calculates the playlist end time\n *\n * @param {Object} playlist a media playlist object\n * @param {number=} expired the amount of time that has\n *                  dropped off the front of the playlist in a live scenario\n * @param {boolean|false} useSafeLiveEnd a boolean value indicating whether or not the\n *                        playlist end calculation should consider the safe live end\n *                        (truncate the playlist end by three segments). This is normally\n *                        used for calculating the end of the playlist's seekable range.\n *                        This takes into account the value of liveEdgePadding.\n *                        Setting liveEdgePadding to 0 is equivalent to setting this to false.\n * @param {number} liveEdgePadding a number indicating how far from the end of the playlist we should be in seconds.\n *                 If this is provided, it is used in the safe live end calculation.\n *                 Setting useSafeLiveEnd=false or liveEdgePadding=0 are equivalent.\n *                 Corresponds to suggestedPresentationDelay in DASH manifests.\n * @return {number} the end time of playlist\n * @function playlistEnd\n */\n\n\nvar playlistEnd = function playlistEnd(playlist, expired, useSafeLiveEnd, liveEdgePadding) {\n  if (!playlist || !playlist.segments) {\n    return null;\n  }\n\n  if (playlist.endList) {\n    return duration(playlist);\n  }\n\n  if (expired === null) {\n    return null;\n  }\n\n  expired = expired || 0;\n  var lastSegmentEndTime = intervalDuration(playlist, playlist.mediaSequence + playlist.segments.length, expired);\n\n  if (useSafeLiveEnd) {\n    liveEdgePadding = typeof liveEdgePadding === 'number' ? liveEdgePadding : liveEdgeDelay(null, playlist);\n    lastSegmentEndTime -= liveEdgePadding;\n  } // don't return a time less than zero\n\n\n  return Math.max(0, lastSegmentEndTime);\n};\n/**\n  * Calculates the interval of time that is currently seekable in a\n  * playlist. The returned time ranges are relative to the earliest\n  * moment in the specified playlist that is still available. A full\n  * seekable implementation for live streams would need to offset\n  * these values by the duration of content that has expired from the\n  * stream.\n  *\n  * @param {Object} playlist a media playlist object\n  * dropped off the front of the playlist in a live scenario\n  * @param {number=} expired the amount of time that has\n  * dropped off the front of the playlist in a live scenario\n  * @param {number} liveEdgePadding how far from the end of the playlist we should be in seconds.\n  *        Corresponds to suggestedPresentationDelay in DASH manifests.\n  * @return {TimeRanges} the periods of time that are valid targets\n  * for seeking\n  */\n\n\nvar seekable = function seekable(playlist, expired, liveEdgePadding) {\n  var useSafeLiveEnd = true;\n  var seekableStart = expired || 0;\n  var seekableEnd = playlistEnd(playlist, expired, useSafeLiveEnd, liveEdgePadding);\n\n  if (seekableEnd === null) {\n    return createTimeRange();\n  }\n\n  return createTimeRange(seekableStart, seekableEnd);\n};\n/**\n * Determine the index and estimated starting time of the segment that\n * contains a specified playback position in a media playlist.\n *\n * @param {Object} options.playlist the media playlist to query\n * @param {number} options.currentTime The number of seconds since the earliest\n * possible position to determine the containing segment for\n * @param {number} options.startTime the time when the segment/part starts\n * @param {number} options.startingSegmentIndex the segment index to start looking at.\n * @param {number?} [options.startingPartIndex] the part index to look at within the segment.\n *\n * @return {Object} an object with partIndex, segmentIndex, and startTime.\n */\n\n\nvar getMediaInfoForTime = function getMediaInfoForTime(_ref4) {\n  var playlist = _ref4.playlist,\n      currentTime = _ref4.currentTime,\n      startingSegmentIndex = _ref4.startingSegmentIndex,\n      startingPartIndex = _ref4.startingPartIndex,\n      startTime = _ref4.startTime,\n      experimentalExactManifestTimings = _ref4.experimentalExactManifestTimings;\n  var time = currentTime - startTime;\n  var partsAndSegments = getPartsAndSegments(playlist);\n  var startIndex = 0;\n\n  for (var i = 0; i < partsAndSegments.length; i++) {\n    var partAndSegment = partsAndSegments[i];\n\n    if (startingSegmentIndex !== partAndSegment.segmentIndex) {\n      continue;\n    } // skip this if part index does not match.\n\n\n    if (typeof startingPartIndex === 'number' && typeof partAndSegment.partIndex === 'number' && startingPartIndex !== partAndSegment.partIndex) {\n      continue;\n    }\n\n    startIndex = i;\n    break;\n  }\n\n  if (time < 0) {\n    // Walk backward from startIndex in the playlist, adding durations\n    // until we find a segment that contains `time` and return it\n    if (startIndex > 0) {\n      for (var _i2 = startIndex - 1; _i2 >= 0; _i2--) {\n        var _partAndSegment = partsAndSegments[_i2];\n        time += _partAndSegment.duration;\n\n        if (experimentalExactManifestTimings) {\n          if (time < 0) {\n            continue;\n          }\n        } else if (time + TIME_FUDGE_FACTOR <= 0) {\n          continue;\n        }\n\n        return {\n          partIndex: _partAndSegment.partIndex,\n          segmentIndex: _partAndSegment.segmentIndex,\n          startTime: startTime - sumDurations({\n            defaultDuration: playlist.targetDuration,\n            durationList: partsAndSegments,\n            startIndex: startIndex,\n            endIndex: _i2\n          })\n        };\n      }\n    } // We were unable to find a good segment within the playlist\n    // so select the first segment\n\n\n    return {\n      partIndex: partsAndSegments[0] && partsAndSegments[0].partIndex || null,\n      segmentIndex: partsAndSegments[0] && partsAndSegments[0].segmentIndex || 0,\n      startTime: currentTime\n    };\n  } // When startIndex is negative, we first walk forward to first segment\n  // adding target durations. If we \"run out of time\" before getting to\n  // the first segment, return the first segment\n\n\n  if (startIndex < 0) {\n    for (var _i3 = startIndex; _i3 < 0; _i3++) {\n      time -= playlist.targetDuration;\n\n      if (time < 0) {\n        return {\n          partIndex: partsAndSegments[0] && partsAndSegments[0].partIndex || null,\n          segmentIndex: partsAndSegments[0] && partsAndSegments[0].segmentIndex || 0,\n          startTime: currentTime\n        };\n      }\n    }\n\n    startIndex = 0;\n  } // Walk forward from startIndex in the playlist, subtracting durations\n  // until we find a segment that contains `time` and return it\n\n\n  for (var _i4 = startIndex; _i4 < partsAndSegments.length; _i4++) {\n    var _partAndSegment2 = partsAndSegments[_i4];\n    time -= _partAndSegment2.duration;\n\n    if (experimentalExactManifestTimings) {\n      if (time > 0) {\n        continue;\n      }\n    } else if (time - TIME_FUDGE_FACTOR >= 0) {\n      continue;\n    }\n\n    return {\n      partIndex: _partAndSegment2.partIndex,\n      segmentIndex: _partAndSegment2.segmentIndex,\n      startTime: startTime + sumDurations({\n        defaultDuration: playlist.targetDuration,\n        durationList: partsAndSegments,\n        startIndex: startIndex,\n        endIndex: _i4\n      })\n    };\n  } // We are out of possible candidates so load the last one...\n\n\n  return {\n    segmentIndex: partsAndSegments[partsAndSegments.length - 1].segmentIndex,\n    partIndex: partsAndSegments[partsAndSegments.length - 1].partIndex,\n    startTime: currentTime\n  };\n};\n/**\n * Check whether the playlist is blacklisted or not.\n *\n * @param {Object} playlist the media playlist object\n * @return {boolean} whether the playlist is blacklisted or not\n * @function isBlacklisted\n */\n\n\nvar isBlacklisted = function isBlacklisted(playlist) {\n  return playlist.excludeUntil && playlist.excludeUntil > Date.now();\n};\n/**\n * Check whether the playlist is compatible with current playback configuration or has\n * been blacklisted permanently for being incompatible.\n *\n * @param {Object} playlist the media playlist object\n * @return {boolean} whether the playlist is incompatible or not\n * @function isIncompatible\n */\n\n\nvar isIncompatible = function isIncompatible(playlist) {\n  return playlist.excludeUntil && playlist.excludeUntil === Infinity;\n};\n/**\n * Check whether the playlist is enabled or not.\n *\n * @param {Object} playlist the media playlist object\n * @return {boolean} whether the playlist is enabled or not\n * @function isEnabled\n */\n\n\nvar isEnabled = function isEnabled(playlist) {\n  var blacklisted = isBlacklisted(playlist);\n  return !playlist.disabled && !blacklisted;\n};\n/**\n * Check whether the playlist has been manually disabled through the representations api.\n *\n * @param {Object} playlist the media playlist object\n * @return {boolean} whether the playlist is disabled manually or not\n * @function isDisabled\n */\n\n\nvar isDisabled = function isDisabled(playlist) {\n  return playlist.disabled;\n};\n/**\n * Returns whether the current playlist is an AES encrypted HLS stream\n *\n * @return {boolean} true if it's an AES encrypted HLS stream\n */\n\n\nvar isAes = function isAes(media) {\n  for (var i = 0; i < media.segments.length; i++) {\n    if (media.segments[i].key) {\n      return true;\n    }\n  }\n\n  return false;\n};\n/**\n * Checks if the playlist has a value for the specified attribute\n *\n * @param {string} attr\n *        Attribute to check for\n * @param {Object} playlist\n *        The media playlist object\n * @return {boolean}\n *         Whether the playlist contains a value for the attribute or not\n * @function hasAttribute\n */\n\n\nvar hasAttribute = function hasAttribute(attr, playlist) {\n  return playlist.attributes && playlist.attributes[attr];\n};\n/**\n * Estimates the time required to complete a segment download from the specified playlist\n *\n * @param {number} segmentDuration\n *        Duration of requested segment\n * @param {number} bandwidth\n *        Current measured bandwidth of the player\n * @param {Object} playlist\n *        The media playlist object\n * @param {number=} bytesReceived\n *        Number of bytes already received for the request. Defaults to 0\n * @return {number|NaN}\n *         The estimated time to request the segment. NaN if bandwidth information for\n *         the given playlist is unavailable\n * @function estimateSegmentRequestTime\n */\n\n\nvar estimateSegmentRequestTime = function estimateSegmentRequestTime(segmentDuration, bandwidth, playlist, bytesReceived) {\n  if (bytesReceived === void 0) {\n    bytesReceived = 0;\n  }\n\n  if (!hasAttribute('BANDWIDTH', playlist)) {\n    return NaN;\n  }\n\n  var size = segmentDuration * playlist.attributes.BANDWIDTH;\n  return (size - bytesReceived * 8) / bandwidth;\n};\n/*\n * Returns whether the current playlist is the lowest rendition\n *\n * @return {Boolean} true if on lowest rendition\n */\n\n\nvar isLowestEnabledRendition = function isLowestEnabledRendition(master, media) {\n  if (master.playlists.length === 1) {\n    return true;\n  }\n\n  var currentBandwidth = media.attributes.BANDWIDTH || Number.MAX_VALUE;\n  return master.playlists.filter(function (playlist) {\n    if (!isEnabled(playlist)) {\n      return false;\n    }\n\n    return (playlist.attributes.BANDWIDTH || 0) < currentBandwidth;\n  }).length === 0;\n};\n\nvar playlistMatch = function playlistMatch(a, b) {\n  // both playlits are null\n  // or only one playlist is non-null\n  // no match\n  if (!a && !b || !a && b || a && !b) {\n    return false;\n  } // playlist objects are the same, match\n\n\n  if (a === b) {\n    return true;\n  } // first try to use id as it should be the most\n  // accurate\n\n\n  if (a.id && b.id && a.id === b.id) {\n    return true;\n  } // next try to use reslovedUri as it should be the\n  // second most accurate.\n\n\n  if (a.resolvedUri && b.resolvedUri && a.resolvedUri === b.resolvedUri) {\n    return true;\n  } // finally try to use uri as it should be accurate\n  // but might miss a few cases for relative uris\n\n\n  if (a.uri && b.uri && a.uri === b.uri) {\n    return true;\n  }\n\n  return false;\n};\n\nvar someAudioVariant = function someAudioVariant(master, callback) {\n  var AUDIO = master && master.mediaGroups && master.mediaGroups.AUDIO || {};\n  var found = false;\n\n  for (var groupName in AUDIO) {\n    for (var label in AUDIO[groupName]) {\n      found = callback(AUDIO[groupName][label]);\n\n      if (found) {\n        break;\n      }\n    }\n\n    if (found) {\n      break;\n    }\n  }\n\n  return !!found;\n};\n\nvar isAudioOnly = function isAudioOnly(master) {\n  // we are audio only if we have no main playlists but do\n  // have media group playlists.\n  if (!master || !master.playlists || !master.playlists.length) {\n    // without audio variants or playlists this\n    // is not an audio only master.\n    var found = someAudioVariant(master, function (variant) {\n      return variant.playlists && variant.playlists.length || variant.uri;\n    });\n    return found;\n  } // if every playlist has only an audio codec it is audio only\n\n\n  var _loop = function _loop(i) {\n    var playlist = master.playlists[i];\n    var CODECS = playlist.attributes && playlist.attributes.CODECS; // all codecs are audio, this is an audio playlist.\n\n    if (CODECS && CODECS.split(',').every(function (c) {\n      return isAudioCodec(c);\n    })) {\n      return \"continue\";\n    } // playlist is in an audio group it is audio only\n\n\n    var found = someAudioVariant(master, function (variant) {\n      return playlistMatch(playlist, variant);\n    });\n\n    if (found) {\n      return \"continue\";\n    } // if we make it here this playlist isn't audio and we\n    // are not audio only\n\n\n    return {\n      v: false\n    };\n  };\n\n  for (var i = 0; i < master.playlists.length; i++) {\n    var _ret = _loop(i);\n\n    if (_ret === \"continue\") continue;\n    if (typeof _ret === \"object\") return _ret.v;\n  } // if we make it past every playlist without returning, then\n  // this is an audio only playlist.\n\n\n  return true;\n}; // exports\n\n\nvar Playlist = {\n  liveEdgeDelay: liveEdgeDelay,\n  duration: duration,\n  seekable: seekable,\n  getMediaInfoForTime: getMediaInfoForTime,\n  isEnabled: isEnabled,\n  isDisabled: isDisabled,\n  isBlacklisted: isBlacklisted,\n  isIncompatible: isIncompatible,\n  playlistEnd: playlistEnd,\n  isAes: isAes,\n  hasAttribute: hasAttribute,\n  estimateSegmentRequestTime: estimateSegmentRequestTime,\n  isLowestEnabledRendition: isLowestEnabledRendition,\n  isAudioOnly: isAudioOnly,\n  playlistMatch: playlistMatch,\n  segmentDurationWithParts: segmentDurationWithParts\n};\nvar log = videojs.log;\n\nvar createPlaylistID = function createPlaylistID(index, uri) {\n  return index + \"-\" + uri;\n};\n/**\n * Parses a given m3u8 playlist\n *\n * @param {Function} [onwarn]\n *        a function to call when the parser triggers a warning event.\n * @param {Function} [oninfo]\n *        a function to call when the parser triggers an info event.\n * @param {string} manifestString\n *        The downloaded manifest string\n * @param {Object[]} [customTagParsers]\n *        An array of custom tag parsers for the m3u8-parser instance\n * @param {Object[]} [customTagMappers]\n *        An array of custom tag mappers for the m3u8-parser instance\n * @param {boolean} [experimentalLLHLS=false]\n *        Whether to keep ll-hls features in the manifest after parsing.\n * @return {Object}\n *         The manifest object\n */\n\n\nvar parseManifest = function parseManifest(_ref) {\n  var onwarn = _ref.onwarn,\n      oninfo = _ref.oninfo,\n      manifestString = _ref.manifestString,\n      _ref$customTagParsers = _ref.customTagParsers,\n      customTagParsers = _ref$customTagParsers === void 0 ? [] : _ref$customTagParsers,\n      _ref$customTagMappers = _ref.customTagMappers,\n      customTagMappers = _ref$customTagMappers === void 0 ? [] : _ref$customTagMappers,\n      experimentalLLHLS = _ref.experimentalLLHLS;\n  var parser = new Parser();\n\n  if (onwarn) {\n    parser.on('warn', onwarn);\n  }\n\n  if (oninfo) {\n    parser.on('info', oninfo);\n  }\n\n  customTagParsers.forEach(function (customParser) {\n    return parser.addParser(customParser);\n  });\n  customTagMappers.forEach(function (mapper) {\n    return parser.addTagMapper(mapper);\n  });\n  parser.push(manifestString);\n  parser.end();\n  var manifest = parser.manifest; // remove llhls features from the parsed manifest\n  // if we don't want llhls support.\n\n  if (!experimentalLLHLS) {\n    ['preloadSegment', 'skip', 'serverControl', 'renditionReports', 'partInf', 'partTargetDuration'].forEach(function (k) {\n      if (manifest.hasOwnProperty(k)) {\n        delete manifest[k];\n      }\n    });\n\n    if (manifest.segments) {\n      manifest.segments.forEach(function (segment) {\n        ['parts', 'preloadHints'].forEach(function (k) {\n          if (segment.hasOwnProperty(k)) {\n            delete segment[k];\n          }\n        });\n      });\n    }\n  }\n\n  if (!manifest.targetDuration) {\n    var targetDuration = 10;\n\n    if (manifest.segments && manifest.segments.length) {\n      targetDuration = manifest.segments.reduce(function (acc, s) {\n        return Math.max(acc, s.duration);\n      }, 0);\n    }\n\n    if (onwarn) {\n      onwarn(\"manifest has no targetDuration defaulting to \" + targetDuration);\n    }\n\n    manifest.targetDuration = targetDuration;\n  }\n\n  var parts = getLastParts(manifest);\n\n  if (parts.length && !manifest.partTargetDuration) {\n    var partTargetDuration = parts.reduce(function (acc, p) {\n      return Math.max(acc, p.duration);\n    }, 0);\n\n    if (onwarn) {\n      onwarn(\"manifest has no partTargetDuration defaulting to \" + partTargetDuration);\n      log.error('LL-HLS manifest has parts but lacks required #EXT-X-PART-INF:PART-TARGET value. See https://datatracker.ietf.org/doc/html/draft-pantos-hls-rfc8216bis-09#section-4.4.3.7. Playback is not guaranteed.');\n    }\n\n    manifest.partTargetDuration = partTargetDuration;\n  }\n\n  return manifest;\n};\n/**\n * Loops through all supported media groups in master and calls the provided\n * callback for each group\n *\n * @param {Object} master\n *        The parsed master manifest object\n * @param {Function} callback\n *        Callback to call for each media group\n */\n\n\nvar forEachMediaGroup = function forEachMediaGroup(master, callback) {\n  if (!master.mediaGroups) {\n    return;\n  }\n\n  ['AUDIO', 'SUBTITLES'].forEach(function (mediaType) {\n    if (!master.mediaGroups[mediaType]) {\n      return;\n    }\n\n    for (var groupKey in master.mediaGroups[mediaType]) {\n      for (var labelKey in master.mediaGroups[mediaType][groupKey]) {\n        var mediaProperties = master.mediaGroups[mediaType][groupKey][labelKey];\n        callback(mediaProperties, mediaType, groupKey, labelKey);\n      }\n    }\n  });\n};\n/**\n * Adds properties and attributes to the playlist to keep consistent functionality for\n * playlists throughout VHS.\n *\n * @param {Object} config\n *        Arguments object\n * @param {Object} config.playlist\n *        The media playlist\n * @param {string} [config.uri]\n *        The uri to the media playlist (if media playlist is not from within a master\n *        playlist)\n * @param {string} id\n *        ID to use for the playlist\n */\n\n\nvar setupMediaPlaylist = function setupMediaPlaylist(_ref2) {\n  var playlist = _ref2.playlist,\n      uri = _ref2.uri,\n      id = _ref2.id;\n  playlist.id = id;\n  playlist.playlistErrors_ = 0;\n\n  if (uri) {\n    // For media playlists, m3u8-parser does not have access to a URI, as HLS media\n    // playlists do not contain their own source URI, but one is needed for consistency in\n    // VHS.\n    playlist.uri = uri;\n  } // For HLS master playlists, even though certain attributes MUST be defined, the\n  // stream may still be played without them.\n  // For HLS media playlists, m3u8-parser does not attach an attributes object to the\n  // manifest.\n  //\n  // To avoid undefined reference errors through the project, and make the code easier\n  // to write/read, add an empty attributes object for these cases.\n\n\n  playlist.attributes = playlist.attributes || {};\n};\n/**\n * Adds ID, resolvedUri, and attributes properties to each playlist of the master, where\n * necessary. In addition, creates playlist IDs for each playlist and adds playlist ID to\n * playlist references to the playlists array.\n *\n * @param {Object} master\n *        The master playlist\n */\n\n\nvar setupMediaPlaylists = function setupMediaPlaylists(master) {\n  var i = master.playlists.length;\n\n  while (i--) {\n    var playlist = master.playlists[i];\n    setupMediaPlaylist({\n      playlist: playlist,\n      id: createPlaylistID(i, playlist.uri)\n    });\n    playlist.resolvedUri = resolveUrl(master.uri, playlist.uri);\n    master.playlists[playlist.id] = playlist; // URI reference added for backwards compatibility\n\n    master.playlists[playlist.uri] = playlist; // Although the spec states an #EXT-X-STREAM-INF tag MUST have a BANDWIDTH attribute,\n    // the stream can be played without it. Although an attributes property may have been\n    // added to the playlist to prevent undefined references, issue a warning to fix the\n    // manifest.\n\n    if (!playlist.attributes.BANDWIDTH) {\n      log.warn('Invalid playlist STREAM-INF detected. Missing BANDWIDTH attribute.');\n    }\n  }\n};\n/**\n * Adds resolvedUri properties to each media group.\n *\n * @param {Object} master\n *        The master playlist\n */\n\n\nvar resolveMediaGroupUris = function resolveMediaGroupUris(master) {\n  forEachMediaGroup(master, function (properties) {\n    if (properties.uri) {\n      properties.resolvedUri = resolveUrl(master.uri, properties.uri);\n    }\n  });\n};\n/**\n * Creates a master playlist wrapper to insert a sole media playlist into.\n *\n * @param {Object} media\n *        Media playlist\n * @param {string} uri\n *        The media URI\n *\n * @return {Object}\n *         Master playlist\n */\n\n\nvar masterForMedia = function masterForMedia(media, uri) {\n  var id = createPlaylistID(0, uri);\n  var master = {\n    mediaGroups: {\n      'AUDIO': {},\n      'VIDEO': {},\n      'CLOSED-CAPTIONS': {},\n      'SUBTITLES': {}\n    },\n    uri: window$1.location.href,\n    resolvedUri: window$1.location.href,\n    playlists: [{\n      uri: uri,\n      id: id,\n      resolvedUri: uri,\n      // m3u8-parser does not attach an attributes property to media playlists so make\n      // sure that the property is attached to avoid undefined reference errors\n      attributes: {}\n    }]\n  }; // set up ID reference\n\n  master.playlists[id] = master.playlists[0]; // URI reference added for backwards compatibility\n\n  master.playlists[uri] = master.playlists[0];\n  return master;\n};\n/**\n * Does an in-place update of the master manifest to add updated playlist URI references\n * as well as other properties needed by VHS that aren't included by the parser.\n *\n * @param {Object} master\n *        Master manifest object\n * @param {string} uri\n *        The source URI\n */\n\n\nvar addPropertiesToMaster = function addPropertiesToMaster(master, uri) {\n  master.uri = uri;\n\n  for (var i = 0; i < master.playlists.length; i++) {\n    if (!master.playlists[i].uri) {\n      // Set up phony URIs for the playlists since playlists are referenced by their URIs\n      // throughout VHS, but some formats (e.g., DASH) don't have external URIs\n      // TODO: consider adding dummy URIs in mpd-parser\n      var phonyUri = \"placeholder-uri-\" + i;\n      master.playlists[i].uri = phonyUri;\n    }\n  }\n\n  var audioOnlyMaster = isAudioOnly(master);\n  forEachMediaGroup(master, function (properties, mediaType, groupKey, labelKey) {\n    var groupId = \"placeholder-uri-\" + mediaType + \"-\" + groupKey + \"-\" + labelKey; // add a playlist array under properties\n\n    if (!properties.playlists || !properties.playlists.length) {\n      // If the manifest is audio only and this media group does not have a uri, check\n      // if the media group is located in the main list of playlists. If it is, don't add\n      // placeholder properties as it shouldn't be considered an alternate audio track.\n      if (audioOnlyMaster && mediaType === 'AUDIO' && !properties.uri) {\n        for (var _i = 0; _i < master.playlists.length; _i++) {\n          var p = master.playlists[_i];\n\n          if (p.attributes && p.attributes.AUDIO && p.attributes.AUDIO === groupKey) {\n            return;\n          }\n        }\n      }\n\n      properties.playlists = [_extends({}, properties)];\n    }\n\n    properties.playlists.forEach(function (p, i) {\n      var id = createPlaylistID(i, groupId);\n\n      if (p.uri) {\n        p.resolvedUri = p.resolvedUri || resolveUrl(master.uri, p.uri);\n      } else {\n        // DEPRECATED, this has been added to prevent a breaking change.\n        // previously we only ever had a single media group playlist, so\n        // we mark the first playlist uri without prepending the index as we used to\n        // ideally we would do all of the playlists the same way.\n        p.uri = i === 0 ? groupId : id; // don't resolve a placeholder uri to an absolute url, just use\n        // the placeholder again\n\n        p.resolvedUri = p.uri;\n      }\n\n      p.id = p.id || id; // add an empty attributes object, all playlists are\n      // expected to have this.\n\n      p.attributes = p.attributes || {}; // setup ID and URI references (URI for backwards compatibility)\n\n      master.playlists[p.id] = p;\n      master.playlists[p.uri] = p;\n    });\n  });\n  setupMediaPlaylists(master);\n  resolveMediaGroupUris(master);\n};\n\nvar mergeOptions$2 = videojs.mergeOptions,\n    EventTarget$1 = videojs.EventTarget;\n\nvar addLLHLSQueryDirectives = function addLLHLSQueryDirectives(uri, media) {\n  if (media.endList || !media.serverControl) {\n    return uri;\n  }\n\n  var parameters = {};\n\n  if (media.serverControl.canBlockReload) {\n    var preloadSegment = media.preloadSegment; // next msn is a zero based value, length is not.\n\n    var nextMSN = media.mediaSequence + media.segments.length; // If preload segment has parts then it is likely\n    // that we are going to request a part of that preload segment.\n    // the logic below is used to determine that.\n\n    if (preloadSegment) {\n      var parts = preloadSegment.parts || []; // _HLS_part is a zero based index\n\n      var nextPart = getKnownPartCount(media) - 1; // if nextPart is > -1 and not equal to just the\n      // length of parts, then we know we had part preload hints\n      // and we need to add the _HLS_part= query\n\n      if (nextPart > -1 && nextPart !== parts.length - 1) {\n        // add existing parts to our preload hints\n        // eslint-disable-next-line\n        parameters._HLS_part = nextPart;\n      } // this if statement makes sure that we request the msn\n      // of the preload segment if:\n      // 1. the preload segment had parts (and was not yet a full segment)\n      //    but was added to our segments array\n      // 2. the preload segment had preload hints for parts that are not in\n      //    the manifest yet.\n      // in all other cases we want the segment after the preload segment\n      // which will be given by using media.segments.length because it is 1 based\n      // rather than 0 based.\n\n\n      if (nextPart > -1 || parts.length) {\n        nextMSN--;\n      }\n    } // add _HLS_msn= in front of any _HLS_part query\n    // eslint-disable-next-line\n\n\n    parameters._HLS_msn = nextMSN;\n  }\n\n  if (media.serverControl && media.serverControl.canSkipUntil) {\n    // add _HLS_skip= infront of all other queries.\n    // eslint-disable-next-line\n    parameters._HLS_skip = media.serverControl.canSkipDateranges ? 'v2' : 'YES';\n  }\n\n  if (Object.keys(parameters).length) {\n    var parsedUri = new window$1.URL(uri);\n    ['_HLS_skip', '_HLS_msn', '_HLS_part'].forEach(function (name) {\n      if (!parameters.hasOwnProperty(name)) {\n        return;\n      }\n\n      parsedUri.searchParams.set(name, parameters[name]);\n    });\n    uri = parsedUri.toString();\n  }\n\n  return uri;\n};\n/**\n * Returns a new segment object with properties and\n * the parts array merged.\n *\n * @param {Object} a the old segment\n * @param {Object} b the new segment\n *\n * @return {Object} the merged segment\n */\n\n\nvar updateSegment = function updateSegment(a, b) {\n  if (!a) {\n    return b;\n  }\n\n  var result = mergeOptions$2(a, b); // if only the old segment has preload hints\n  // and the new one does not, remove preload hints.\n\n  if (a.preloadHints && !b.preloadHints) {\n    delete result.preloadHints;\n  } // if only the old segment has parts\n  // then the parts are no longer valid\n\n\n  if (a.parts && !b.parts) {\n    delete result.parts; // if both segments have parts\n    // copy part propeties from the old segment\n    // to the new one.\n  } else if (a.parts && b.parts) {\n    for (var i = 0; i < b.parts.length; i++) {\n      if (a.parts && a.parts[i]) {\n        result.parts[i] = mergeOptions$2(a.parts[i], b.parts[i]);\n      }\n    }\n  } // set skipped to false for segments that have\n  // have had information merged from the old segment.\n\n\n  if (!a.skipped && b.skipped) {\n    result.skipped = false;\n  } // set preload to false for segments that have\n  // had information added in the new segment.\n\n\n  if (a.preload && !b.preload) {\n    result.preload = false;\n  }\n\n  return result;\n};\n/**\n * Returns a new array of segments that is the result of merging\n * properties from an older list of segments onto an updated\n * list. No properties on the updated playlist will be ovewritten.\n *\n * @param {Array} original the outdated list of segments\n * @param {Array} update the updated list of segments\n * @param {number=} offset the index of the first update\n * segment in the original segment list. For non-live playlists,\n * this should always be zero and does not need to be\n * specified. For live playlists, it should be the difference\n * between the media sequence numbers in the original and updated\n * playlists.\n * @return {Array} a list of merged segment objects\n */\n\n\nvar updateSegments = function updateSegments(original, update, offset) {\n  var oldSegments = original.slice();\n  var newSegments = update.slice();\n  offset = offset || 0;\n  var result = [];\n  var currentMap;\n\n  for (var newIndex = 0; newIndex < newSegments.length; newIndex++) {\n    var oldSegment = oldSegments[newIndex + offset];\n    var newSegment = newSegments[newIndex];\n\n    if (oldSegment) {\n      currentMap = oldSegment.map || currentMap;\n      result.push(updateSegment(oldSegment, newSegment));\n    } else {\n      // carry over map to new segment if it is missing\n      if (currentMap && !newSegment.map) {\n        newSegment.map = currentMap;\n      }\n\n      result.push(newSegment);\n    }\n  }\n\n  return result;\n};\n\nvar resolveSegmentUris = function resolveSegmentUris(segment, baseUri) {\n  // preloadSegment will not have a uri at all\n  // as the segment isn't actually in the manifest yet, only parts\n  if (!segment.resolvedUri && segment.uri) {\n    segment.resolvedUri = resolveUrl(baseUri, segment.uri);\n  }\n\n  if (segment.key && !segment.key.resolvedUri) {\n    segment.key.resolvedUri = resolveUrl(baseUri, segment.key.uri);\n  }\n\n  if (segment.map && !segment.map.resolvedUri) {\n    segment.map.resolvedUri = resolveUrl(baseUri, segment.map.uri);\n  }\n\n  if (segment.map && segment.map.key && !segment.map.key.resolvedUri) {\n    segment.map.key.resolvedUri = resolveUrl(baseUri, segment.map.key.uri);\n  }\n\n  if (segment.parts && segment.parts.length) {\n    segment.parts.forEach(function (p) {\n      if (p.resolvedUri) {\n        return;\n      }\n\n      p.resolvedUri = resolveUrl(baseUri, p.uri);\n    });\n  }\n\n  if (segment.preloadHints && segment.preloadHints.length) {\n    segment.preloadHints.forEach(function (p) {\n      if (p.resolvedUri) {\n        return;\n      }\n\n      p.resolvedUri = resolveUrl(baseUri, p.uri);\n    });\n  }\n};\n\nvar getAllSegments = function getAllSegments(media) {\n  var segments = media.segments || [];\n  var preloadSegment = media.preloadSegment; // a preloadSegment with only preloadHints is not currently\n  // a usable segment, only include a preloadSegment that has\n  // parts.\n\n  if (preloadSegment && preloadSegment.parts && preloadSegment.parts.length) {\n    // if preloadHints has a MAP that means that the\n    // init segment is going to change. We cannot use any of the parts\n    // from this preload segment.\n    if (preloadSegment.preloadHints) {\n      for (var i = 0; i < preloadSegment.preloadHints.length; i++) {\n        if (preloadSegment.preloadHints[i].type === 'MAP') {\n          return segments;\n        }\n      }\n    } // set the duration for our preload segment to target duration.\n\n\n    preloadSegment.duration = media.targetDuration;\n    preloadSegment.preload = true;\n    segments.push(preloadSegment);\n  }\n\n  return segments;\n}; // consider the playlist unchanged if the playlist object is the same or\n// the number of segments is equal, the media sequence number is unchanged,\n// and this playlist hasn't become the end of the playlist\n\n\nvar isPlaylistUnchanged = function isPlaylistUnchanged(a, b) {\n  return a === b || a.segments && b.segments && a.segments.length === b.segments.length && a.endList === b.endList && a.mediaSequence === b.mediaSequence && a.preloadSegment === b.preloadSegment;\n};\n/**\n  * Returns a new master playlist that is the result of merging an\n  * updated media playlist into the original version. If the\n  * updated media playlist does not match any of the playlist\n  * entries in the original master playlist, null is returned.\n  *\n  * @param {Object} master a parsed master M3U8 object\n  * @param {Object} media a parsed media M3U8 object\n  * @return {Object} a new object that represents the original\n  * master playlist with the updated media playlist merged in, or\n  * null if the merge produced no change.\n  */\n\n\nvar updateMaster$1 = function updateMaster(master, newMedia, unchangedCheck) {\n  if (unchangedCheck === void 0) {\n    unchangedCheck = isPlaylistUnchanged;\n  }\n\n  var result = mergeOptions$2(master, {});\n  var oldMedia = result.playlists[newMedia.id];\n\n  if (!oldMedia) {\n    return null;\n  }\n\n  if (unchangedCheck(oldMedia, newMedia)) {\n    return null;\n  }\n\n  newMedia.segments = getAllSegments(newMedia);\n  var mergedPlaylist = mergeOptions$2(oldMedia, newMedia); // always use the new media's preload segment\n\n  if (mergedPlaylist.preloadSegment && !newMedia.preloadSegment) {\n    delete mergedPlaylist.preloadSegment;\n  } // if the update could overlap existing segment information, merge the two segment lists\n\n\n  if (oldMedia.segments) {\n    if (newMedia.skip) {\n      newMedia.segments = newMedia.segments || []; // add back in objects for skipped segments, so that we merge\n      // old properties into the new segments\n\n      for (var i = 0; i < newMedia.skip.skippedSegments; i++) {\n        newMedia.segments.unshift({\n          skipped: true\n        });\n      }\n    }\n\n    mergedPlaylist.segments = updateSegments(oldMedia.segments, newMedia.segments, newMedia.mediaSequence - oldMedia.mediaSequence);\n  } // resolve any segment URIs to prevent us from having to do it later\n\n\n  mergedPlaylist.segments.forEach(function (segment) {\n    resolveSegmentUris(segment, mergedPlaylist.resolvedUri);\n  }); // TODO Right now in the playlists array there are two references to each playlist, one\n  // that is referenced by index, and one by URI. The index reference may no longer be\n  // necessary.\n\n  for (var _i = 0; _i < result.playlists.length; _i++) {\n    if (result.playlists[_i].id === newMedia.id) {\n      result.playlists[_i] = mergedPlaylist;\n    }\n  }\n\n  result.playlists[newMedia.id] = mergedPlaylist; // URI reference added for backwards compatibility\n\n  result.playlists[newMedia.uri] = mergedPlaylist; // update media group playlist references.\n\n  forEachMediaGroup(master, function (properties, mediaType, groupKey, labelKey) {\n    if (!properties.playlists) {\n      return;\n    }\n\n    for (var _i2 = 0; _i2 < properties.playlists.length; _i2++) {\n      if (newMedia.id === properties.playlists[_i2].id) {\n        properties.playlists[_i2] = newMedia;\n      }\n    }\n  });\n  return result;\n};\n/**\n * Calculates the time to wait before refreshing a live playlist\n *\n * @param {Object} media\n *        The current media\n * @param {boolean} update\n *        True if there were any updates from the last refresh, false otherwise\n * @return {number}\n *         The time in ms to wait before refreshing the live playlist\n */\n\n\nvar refreshDelay = function refreshDelay(media, update) {\n  var segments = media.segments || [];\n  var lastSegment = segments[segments.length - 1];\n  var lastPart = lastSegment && lastSegment.parts && lastSegment.parts[lastSegment.parts.length - 1];\n  var lastDuration = lastPart && lastPart.duration || lastSegment && lastSegment.duration;\n\n  if (update && lastDuration) {\n    return lastDuration * 1000;\n  } // if the playlist is unchanged since the last reload or last segment duration\n  // cannot be determined, try again after half the target duration\n\n\n  return (media.partTargetDuration || media.targetDuration || 10) * 500;\n};\n/**\n * Load a playlist from a remote location\n *\n * @class PlaylistLoader\n * @extends Stream\n * @param {string|Object} src url or object of manifest\n * @param {boolean} withCredentials the withCredentials xhr option\n * @class\n */\n\n\nvar PlaylistLoader = /*#__PURE__*/function (_EventTarget) {\n  _inheritsLoose(PlaylistLoader, _EventTarget);\n\n  function PlaylistLoader(src, vhs, options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    _this = _EventTarget.call(this) || this;\n\n    if (!src) {\n      throw new Error('A non-empty playlist URL or object is required');\n    }\n\n    _this.logger_ = logger('PlaylistLoader');\n    var _options = options,\n        _options$withCredenti = _options.withCredentials,\n        withCredentials = _options$withCredenti === void 0 ? false : _options$withCredenti,\n        _options$handleManife = _options.handleManifestRedirects,\n        handleManifestRedirects = _options$handleManife === void 0 ? false : _options$handleManife;\n    _this.src = src;\n    _this.vhs_ = vhs;\n    _this.withCredentials = withCredentials;\n    _this.handleManifestRedirects = handleManifestRedirects;\n    var vhsOptions = vhs.options_;\n    _this.customTagParsers = vhsOptions && vhsOptions.customTagParsers || [];\n    _this.customTagMappers = vhsOptions && vhsOptions.customTagMappers || [];\n    _this.experimentalLLHLS = vhsOptions && vhsOptions.experimentalLLHLS || false; // force experimentalLLHLS for IE 11\n\n    if (videojs.browser.IE_VERSION) {\n      _this.experimentalLLHLS = false;\n    } // initialize the loader state\n\n\n    _this.state = 'HAVE_NOTHING'; // live playlist staleness timeout\n\n    _this.handleMediaupdatetimeout_ = _this.handleMediaupdatetimeout_.bind(_assertThisInitialized(_this));\n\n    _this.on('mediaupdatetimeout', _this.handleMediaupdatetimeout_);\n\n    return _this;\n  }\n\n  var _proto = PlaylistLoader.prototype;\n\n  _proto.handleMediaupdatetimeout_ = function handleMediaupdatetimeout_() {\n    var _this2 = this;\n\n    if (this.state !== 'HAVE_METADATA') {\n      // only refresh the media playlist if no other activity is going on\n      return;\n    }\n\n    var media = this.media();\n    var uri = resolveUrl(this.master.uri, media.uri);\n\n    if (this.experimentalLLHLS) {\n      uri = addLLHLSQueryDirectives(uri, media);\n    }\n\n    this.state = 'HAVE_CURRENT_METADATA';\n    this.request = this.vhs_.xhr({\n      uri: uri,\n      withCredentials: this.withCredentials\n    }, function (error, req) {\n      // disposed\n      if (!_this2.request) {\n        return;\n      }\n\n      if (error) {\n        return _this2.playlistRequestError(_this2.request, _this2.media(), 'HAVE_METADATA');\n      }\n\n      _this2.haveMetadata({\n        playlistString: _this2.request.responseText,\n        url: _this2.media().uri,\n        id: _this2.media().id\n      });\n    });\n  };\n\n  _proto.playlistRequestError = function playlistRequestError(xhr, playlist, startingState) {\n    var uri = playlist.uri,\n        id = playlist.id; // any in-flight request is now finished\n\n    this.request = null;\n\n    if (startingState) {\n      this.state = startingState;\n    }\n\n    this.error = {\n      playlist: this.master.playlists[id],\n      status: xhr.status,\n      message: \"HLS playlist request error at URL: \" + uri + \".\",\n      responseText: xhr.responseText,\n      code: xhr.status >= 500 ? 4 : 2\n    };\n    this.trigger('error');\n  };\n\n  _proto.parseManifest_ = function parseManifest_(_ref) {\n    var _this3 = this;\n\n    var url = _ref.url,\n        manifestString = _ref.manifestString;\n    return parseManifest({\n      onwarn: function onwarn(_ref2) {\n        var message = _ref2.message;\n        return _this3.logger_(\"m3u8-parser warn for \" + url + \": \" + message);\n      },\n      oninfo: function oninfo(_ref3) {\n        var message = _ref3.message;\n        return _this3.logger_(\"m3u8-parser info for \" + url + \": \" + message);\n      },\n      manifestString: manifestString,\n      customTagParsers: this.customTagParsers,\n      customTagMappers: this.customTagMappers,\n      experimentalLLHLS: this.experimentalLLHLS\n    });\n  }\n  /**\n   * Update the playlist loader's state in response to a new or updated playlist.\n   *\n   * @param {string} [playlistString]\n   *        Playlist string (if playlistObject is not provided)\n   * @param {Object} [playlistObject]\n   *        Playlist object (if playlistString is not provided)\n   * @param {string} url\n   *        URL of playlist\n   * @param {string} id\n   *        ID to use for playlist\n   */\n  ;\n\n  _proto.haveMetadata = function haveMetadata(_ref4) {\n    var playlistString = _ref4.playlistString,\n        playlistObject = _ref4.playlistObject,\n        url = _ref4.url,\n        id = _ref4.id; // any in-flight request is now finished\n\n    this.request = null;\n    this.state = 'HAVE_METADATA';\n    var playlist = playlistObject || this.parseManifest_({\n      url: url,\n      manifestString: playlistString\n    });\n    playlist.lastRequest = Date.now();\n    setupMediaPlaylist({\n      playlist: playlist,\n      uri: url,\n      id: id\n    }); // merge this playlist into the master\n\n    var update = updateMaster$1(this.master, playlist);\n    this.targetDuration = playlist.partTargetDuration || playlist.targetDuration;\n    this.pendingMedia_ = null;\n\n    if (update) {\n      this.master = update;\n      this.media_ = this.master.playlists[id];\n    } else {\n      this.trigger('playlistunchanged');\n    }\n\n    this.updateMediaUpdateTimeout_(refreshDelay(this.media(), !!update));\n    this.trigger('loadedplaylist');\n  }\n  /**\n    * Abort any outstanding work and clean up.\n    */\n  ;\n\n  _proto.dispose = function dispose() {\n    this.trigger('dispose');\n    this.stopRequest();\n    window$1.clearTimeout(this.mediaUpdateTimeout);\n    window$1.clearTimeout(this.finalRenditionTimeout);\n    this.off();\n  };\n\n  _proto.stopRequest = function stopRequest() {\n    if (this.request) {\n      var oldRequest = this.request;\n      this.request = null;\n      oldRequest.onreadystatechange = null;\n      oldRequest.abort();\n    }\n  }\n  /**\n    * When called without any arguments, returns the currently\n    * active media playlist. When called with a single argument,\n    * triggers the playlist loader to asynchronously switch to the\n    * specified media playlist. Calling this method while the\n    * loader is in the HAVE_NOTHING causes an error to be emitted\n    * but otherwise has no effect.\n    *\n    * @param {Object=} playlist the parsed media playlist\n    * object to switch to\n    * @param {boolean=} shouldDelay whether we should delay the request by half target duration\n    *\n    * @return {Playlist} the current loaded media\n    */\n  ;\n\n  _proto.media = function media(playlist, shouldDelay) {\n    var _this4 = this; // getter\n\n\n    if (!playlist) {\n      return this.media_;\n    } // setter\n\n\n    if (this.state === 'HAVE_NOTHING') {\n      throw new Error('Cannot switch media playlist from ' + this.state);\n    } // find the playlist object if the target playlist has been\n    // specified by URI\n\n\n    if (typeof playlist === 'string') {\n      if (!this.master.playlists[playlist]) {\n        throw new Error('Unknown playlist URI: ' + playlist);\n      }\n\n      playlist = this.master.playlists[playlist];\n    }\n\n    window$1.clearTimeout(this.finalRenditionTimeout);\n\n    if (shouldDelay) {\n      var delay = (playlist.partTargetDuration || playlist.targetDuration) / 2 * 1000 || 5 * 1000;\n      this.finalRenditionTimeout = window$1.setTimeout(this.media.bind(this, playlist, false), delay);\n      return;\n    }\n\n    var startingState = this.state;\n    var mediaChange = !this.media_ || playlist.id !== this.media_.id;\n    var masterPlaylistRef = this.master.playlists[playlist.id]; // switch to fully loaded playlists immediately\n\n    if (masterPlaylistRef && masterPlaylistRef.endList || // handle the case of a playlist object (e.g., if using vhs-json with a resolved\n    // media playlist or, for the case of demuxed audio, a resolved audio media group)\n    playlist.endList && playlist.segments.length) {\n      // abort outstanding playlist requests\n      if (this.request) {\n        this.request.onreadystatechange = null;\n        this.request.abort();\n        this.request = null;\n      }\n\n      this.state = 'HAVE_METADATA';\n      this.media_ = playlist; // trigger media change if the active media has been updated\n\n      if (mediaChange) {\n        this.trigger('mediachanging');\n\n        if (startingState === 'HAVE_MASTER') {\n          // The initial playlist was a master manifest, and the first media selected was\n          // also provided (in the form of a resolved playlist object) as part of the\n          // source object (rather than just a URL). Therefore, since the media playlist\n          // doesn't need to be requested, loadedmetadata won't trigger as part of the\n          // normal flow, and needs an explicit trigger here.\n          this.trigger('loadedmetadata');\n        } else {\n          this.trigger('mediachange');\n        }\n      }\n\n      return;\n    } // We update/set the timeout here so that live playlists\n    // that are not a media change will \"start\" the loader as expected.\n    // We expect that this function will start the media update timeout\n    // cycle again. This also prevents a playlist switch failure from\n    // causing us to stall during live.\n\n\n    this.updateMediaUpdateTimeout_(refreshDelay(playlist, true)); // switching to the active playlist is a no-op\n\n    if (!mediaChange) {\n      return;\n    }\n\n    this.state = 'SWITCHING_MEDIA'; // there is already an outstanding playlist request\n\n    if (this.request) {\n      if (playlist.resolvedUri === this.request.url) {\n        // requesting to switch to the same playlist multiple times\n        // has no effect after the first\n        return;\n      }\n\n      this.request.onreadystatechange = null;\n      this.request.abort();\n      this.request = null;\n    } // request the new playlist\n\n\n    if (this.media_) {\n      this.trigger('mediachanging');\n    }\n\n    this.pendingMedia_ = playlist;\n    this.request = this.vhs_.xhr({\n      uri: playlist.resolvedUri,\n      withCredentials: this.withCredentials\n    }, function (error, req) {\n      // disposed\n      if (!_this4.request) {\n        return;\n      }\n\n      playlist.lastRequest = Date.now();\n      playlist.resolvedUri = resolveManifestRedirect(_this4.handleManifestRedirects, playlist.resolvedUri, req);\n\n      if (error) {\n        return _this4.playlistRequestError(_this4.request, playlist, startingState);\n      }\n\n      _this4.haveMetadata({\n        playlistString: req.responseText,\n        url: playlist.uri,\n        id: playlist.id\n      }); // fire loadedmetadata the first time a media playlist is loaded\n\n\n      if (startingState === 'HAVE_MASTER') {\n        _this4.trigger('loadedmetadata');\n      } else {\n        _this4.trigger('mediachange');\n      }\n    });\n  }\n  /**\n   * pause loading of the playlist\n   */\n  ;\n\n  _proto.pause = function pause() {\n    if (this.mediaUpdateTimeout) {\n      window$1.clearTimeout(this.mediaUpdateTimeout);\n      this.mediaUpdateTimeout = null;\n    }\n\n    this.stopRequest();\n\n    if (this.state === 'HAVE_NOTHING') {\n      // If we pause the loader before any data has been retrieved, its as if we never\n      // started, so reset to an unstarted state.\n      this.started = false;\n    } // Need to restore state now that no activity is happening\n\n\n    if (this.state === 'SWITCHING_MEDIA') {\n      // if the loader was in the process of switching media, it should either return to\n      // HAVE_MASTER or HAVE_METADATA depending on if the loader has loaded a media\n      // playlist yet. This is determined by the existence of loader.media_\n      if (this.media_) {\n        this.state = 'HAVE_METADATA';\n      } else {\n        this.state = 'HAVE_MASTER';\n      }\n    } else if (this.state === 'HAVE_CURRENT_METADATA') {\n      this.state = 'HAVE_METADATA';\n    }\n  }\n  /**\n   * start loading of the playlist\n   */\n  ;\n\n  _proto.load = function load(shouldDelay) {\n    var _this5 = this;\n\n    if (this.mediaUpdateTimeout) {\n      window$1.clearTimeout(this.mediaUpdateTimeout);\n      this.mediaUpdateTimeout = null;\n    }\n\n    var media = this.media();\n\n    if (shouldDelay) {\n      var delay = media ? (media.partTargetDuration || media.targetDuration) / 2 * 1000 : 5 * 1000;\n      this.mediaUpdateTimeout = window$1.setTimeout(function () {\n        _this5.mediaUpdateTimeout = null;\n\n        _this5.load();\n      }, delay);\n      return;\n    }\n\n    if (!this.started) {\n      this.start();\n      return;\n    }\n\n    if (media && !media.endList) {\n      this.trigger('mediaupdatetimeout');\n    } else {\n      this.trigger('loadedplaylist');\n    }\n  };\n\n  _proto.updateMediaUpdateTimeout_ = function updateMediaUpdateTimeout_(delay) {\n    var _this6 = this;\n\n    if (this.mediaUpdateTimeout) {\n      window$1.clearTimeout(this.mediaUpdateTimeout);\n      this.mediaUpdateTimeout = null;\n    } // we only have use mediaupdatetimeout for live playlists.\n\n\n    if (!this.media() || this.media().endList) {\n      return;\n    }\n\n    this.mediaUpdateTimeout = window$1.setTimeout(function () {\n      _this6.mediaUpdateTimeout = null;\n\n      _this6.trigger('mediaupdatetimeout');\n\n      _this6.updateMediaUpdateTimeout_(delay);\n    }, delay);\n  }\n  /**\n   * start loading of the playlist\n   */\n  ;\n\n  _proto.start = function start() {\n    var _this7 = this;\n\n    this.started = true;\n\n    if (typeof this.src === 'object') {\n      // in the case of an entirely constructed manifest object (meaning there's no actual\n      // manifest on a server), default the uri to the page's href\n      if (!this.src.uri) {\n        this.src.uri = window$1.location.href;\n      } // resolvedUri is added on internally after the initial request. Since there's no\n      // request for pre-resolved manifests, add on resolvedUri here.\n\n\n      this.src.resolvedUri = this.src.uri; // Since a manifest object was passed in as the source (instead of a URL), the first\n      // request can be skipped (since the top level of the manifest, at a minimum, is\n      // already available as a parsed manifest object). However, if the manifest object\n      // represents a master playlist, some media playlists may need to be resolved before\n      // the starting segment list is available. Therefore, go directly to setup of the\n      // initial playlist, and let the normal flow continue from there.\n      //\n      // Note that the call to setup is asynchronous, as other sections of VHS may assume\n      // that the first request is asynchronous.\n\n      setTimeout(function () {\n        _this7.setupInitialPlaylist(_this7.src);\n      }, 0);\n      return;\n    } // request the specified URL\n\n\n    this.request = this.vhs_.xhr({\n      uri: this.src,\n      withCredentials: this.withCredentials\n    }, function (error, req) {\n      // disposed\n      if (!_this7.request) {\n        return;\n      } // clear the loader's request reference\n\n\n      _this7.request = null;\n\n      if (error) {\n        _this7.error = {\n          status: req.status,\n          message: \"HLS playlist request error at URL: \" + _this7.src + \".\",\n          responseText: req.responseText,\n          // MEDIA_ERR_NETWORK\n          code: 2\n        };\n\n        if (_this7.state === 'HAVE_NOTHING') {\n          _this7.started = false;\n        }\n\n        return _this7.trigger('error');\n      }\n\n      _this7.src = resolveManifestRedirect(_this7.handleManifestRedirects, _this7.src, req);\n\n      var manifest = _this7.parseManifest_({\n        manifestString: req.responseText,\n        url: _this7.src\n      });\n\n      _this7.setupInitialPlaylist(manifest);\n    });\n  };\n\n  _proto.srcUri = function srcUri() {\n    return typeof this.src === 'string' ? this.src : this.src.uri;\n  }\n  /**\n   * Given a manifest object that's either a master or media playlist, trigger the proper\n   * events and set the state of the playlist loader.\n   *\n   * If the manifest object represents a master playlist, `loadedplaylist` will be\n   * triggered to allow listeners to select a playlist. If none is selected, the loader\n   * will default to the first one in the playlists array.\n   *\n   * If the manifest object represents a media playlist, `loadedplaylist` will be\n   * triggered followed by `loadedmetadata`, as the only available playlist is loaded.\n   *\n   * In the case of a media playlist, a master playlist object wrapper with one playlist\n   * will be created so that all logic can handle playlists in the same fashion (as an\n   * assumed manifest object schema).\n   *\n   * @param {Object} manifest\n   *        The parsed manifest object\n   */\n  ;\n\n  _proto.setupInitialPlaylist = function setupInitialPlaylist(manifest) {\n    this.state = 'HAVE_MASTER';\n\n    if (manifest.playlists) {\n      this.master = manifest;\n      addPropertiesToMaster(this.master, this.srcUri()); // If the initial master playlist has playlists wtih segments already resolved,\n      // then resolve URIs in advance, as they are usually done after a playlist request,\n      // which may not happen if the playlist is resolved.\n\n      manifest.playlists.forEach(function (playlist) {\n        playlist.segments = getAllSegments(playlist);\n        playlist.segments.forEach(function (segment) {\n          resolveSegmentUris(segment, playlist.resolvedUri);\n        });\n      });\n      this.trigger('loadedplaylist');\n\n      if (!this.request) {\n        // no media playlist was specifically selected so start\n        // from the first listed one\n        this.media(this.master.playlists[0]);\n      }\n\n      return;\n    } // In order to support media playlists passed in as vhs-json, the case where the uri\n    // is not provided as part of the manifest should be considered, and an appropriate\n    // default used.\n\n\n    var uri = this.srcUri() || window$1.location.href;\n    this.master = masterForMedia(manifest, uri);\n    this.haveMetadata({\n      playlistObject: manifest,\n      url: uri,\n      id: this.master.playlists[0].id\n    });\n    this.trigger('loadedmetadata');\n  };\n\n  return PlaylistLoader;\n}(EventTarget$1);\n/**\n * @file xhr.js\n */\n\n\nvar videojsXHR = videojs.xhr,\n    mergeOptions$1 = videojs.mergeOptions;\n\nvar callbackWrapper = function callbackWrapper(request, error, response, callback) {\n  var reqResponse = request.responseType === 'arraybuffer' ? request.response : request.responseText;\n\n  if (!error && reqResponse) {\n    request.responseTime = Date.now();\n    request.roundTripTime = request.responseTime - request.requestTime;\n    request.bytesReceived = reqResponse.byteLength || reqResponse.length;\n\n    if (!request.bandwidth) {\n      request.bandwidth = Math.floor(request.bytesReceived / request.roundTripTime * 8 * 1000);\n    }\n  }\n\n  if (response.headers) {\n    request.responseHeaders = response.headers;\n  } // videojs.xhr now uses a specific code on the error\n  // object to signal that a request has timed out instead\n  // of setting a boolean on the request object\n\n\n  if (error && error.code === 'ETIMEDOUT') {\n    request.timedout = true;\n  } // videojs.xhr no longer considers status codes outside of 200 and 0\n  // (for file uris) to be errors, but the old XHR did, so emulate that\n  // behavior. Status 206 may be used in response to byterange requests.\n\n\n  if (!error && !request.aborted && response.statusCode !== 200 && response.statusCode !== 206 && response.statusCode !== 0) {\n    error = new Error('XHR Failed with a response of: ' + (request && (reqResponse || request.responseText)));\n  }\n\n  callback(error, request);\n};\n\nvar xhrFactory = function xhrFactory() {\n  var xhr = function XhrFunction(options, callback) {\n    // Add a default timeout\n    options = mergeOptions$1({\n      timeout: 45e3\n    }, options); // Allow an optional user-specified function to modify the option\n    // object before we construct the xhr request\n\n    var beforeRequest = XhrFunction.beforeRequest || videojs.Vhs.xhr.beforeRequest;\n\n    if (beforeRequest && typeof beforeRequest === 'function') {\n      var newOptions = beforeRequest(options);\n\n      if (newOptions) {\n        options = newOptions;\n      }\n    } // Use the standard videojs.xhr() method unless `videojs.Vhs.xhr` has been overriden\n    // TODO: switch back to videojs.Vhs.xhr.name === 'XhrFunction' when we drop IE11\n\n\n    var xhrMethod = videojs.Vhs.xhr.original === true ? videojsXHR : videojs.Vhs.xhr;\n    var request = xhrMethod(options, function (error, response) {\n      return callbackWrapper(request, error, response, callback);\n    });\n    var originalAbort = request.abort;\n\n    request.abort = function () {\n      request.aborted = true;\n      return originalAbort.apply(request, arguments);\n    };\n\n    request.uri = options.uri;\n    request.requestTime = Date.now();\n    return request;\n  };\n\n  xhr.original = true;\n  return xhr;\n};\n/**\n * Turns segment byterange into a string suitable for use in\n * HTTP Range requests\n *\n * @param {Object} byterange - an object with two values defining the start and end\n *                             of a byte-range\n */\n\n\nvar byterangeStr = function byterangeStr(byterange) {\n  // `byterangeEnd` is one less than `offset + length` because the HTTP range\n  // header uses inclusive ranges\n  var byterangeEnd;\n  var byterangeStart = byterange.offset;\n\n  if (typeof byterange.offset === 'bigint' || typeof byterange.length === 'bigint') {\n    byterangeEnd = window$1.BigInt(byterange.offset) + window$1.BigInt(byterange.length) - window$1.BigInt(1);\n  } else {\n    byterangeEnd = byterange.offset + byterange.length - 1;\n  }\n\n  return 'bytes=' + byterangeStart + '-' + byterangeEnd;\n};\n/**\n * Defines headers for use in the xhr request for a particular segment.\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n */\n\n\nvar segmentXhrHeaders = function segmentXhrHeaders(segment) {\n  var headers = {};\n\n  if (segment.byterange) {\n    headers.Range = byterangeStr(segment.byterange);\n  }\n\n  return headers;\n};\n/**\n * @file bin-utils.js\n */\n\n/**\n * convert a TimeRange to text\n *\n * @param {TimeRange} range the timerange to use for conversion\n * @param {number} i the iterator on the range to convert\n * @return {string} the range in string format\n */\n\n\nvar textRange = function textRange(range, i) {\n  return range.start(i) + '-' + range.end(i);\n};\n/**\n * format a number as hex string\n *\n * @param {number} e The number\n * @param {number} i the iterator\n * @return {string} the hex formatted number as a string\n */\n\n\nvar formatHexString = function formatHexString(e, i) {\n  var value = e.toString(16);\n  return '00'.substring(0, 2 - value.length) + value + (i % 2 ? ' ' : '');\n};\n\nvar formatAsciiString = function formatAsciiString(e) {\n  if (e >= 0x20 && e < 0x7e) {\n    return String.fromCharCode(e);\n  }\n\n  return '.';\n};\n/**\n * Creates an object for sending to a web worker modifying properties that are TypedArrays\n * into a new object with seperated properties for the buffer, byteOffset, and byteLength.\n *\n * @param {Object} message\n *        Object of properties and values to send to the web worker\n * @return {Object}\n *         Modified message with TypedArray values expanded\n * @function createTransferableMessage\n */\n\n\nvar createTransferableMessage = function createTransferableMessage(message) {\n  var transferable = {};\n  Object.keys(message).forEach(function (key) {\n    var value = message[key];\n\n    if (ArrayBuffer.isView(value)) {\n      transferable[key] = {\n        bytes: value.buffer,\n        byteOffset: value.byteOffset,\n        byteLength: value.byteLength\n      };\n    } else {\n      transferable[key] = value;\n    }\n  });\n  return transferable;\n};\n/**\n * Returns a unique string identifier for a media initialization\n * segment.\n *\n * @param {Object} initSegment\n *        the init segment object.\n *\n * @return {string} the generated init segment id\n */\n\n\nvar initSegmentId = function initSegmentId(initSegment) {\n  var byterange = initSegment.byterange || {\n    length: Infinity,\n    offset: 0\n  };\n  return [byterange.length, byterange.offset, initSegment.resolvedUri].join(',');\n};\n/**\n * Returns a unique string identifier for a media segment key.\n *\n * @param {Object} key the encryption key\n * @return {string} the unique id for the media segment key.\n */\n\n\nvar segmentKeyId = function segmentKeyId(key) {\n  return key.resolvedUri;\n};\n/**\n * utils to help dump binary data to the console\n *\n * @param {Array|TypedArray} data\n *        data to dump to a string\n *\n * @return {string} the data as a hex string.\n */\n\n\nvar hexDump = function hexDump(data) {\n  var bytes = Array.prototype.slice.call(data);\n  var step = 16;\n  var result = '';\n  var hex;\n  var ascii;\n\n  for (var j = 0; j < bytes.length / step; j++) {\n    hex = bytes.slice(j * step, j * step + step).map(formatHexString).join('');\n    ascii = bytes.slice(j * step, j * step + step).map(formatAsciiString).join('');\n    result += hex + ' ' + ascii + '\\n';\n  }\n\n  return result;\n};\n\nvar tagDump = function tagDump(_ref) {\n  var bytes = _ref.bytes;\n  return hexDump(bytes);\n};\n\nvar textRanges = function textRanges(ranges) {\n  var result = '';\n  var i;\n\n  for (i = 0; i < ranges.length; i++) {\n    result += textRange(ranges, i) + ' ';\n  }\n\n  return result;\n};\n\nvar utils = /*#__PURE__*/Object.freeze({\n  __proto__: null,\n  createTransferableMessage: createTransferableMessage,\n  initSegmentId: initSegmentId,\n  segmentKeyId: segmentKeyId,\n  hexDump: hexDump,\n  tagDump: tagDump,\n  textRanges: textRanges\n}); // TODO handle fmp4 case where the timing info is accurate and doesn't involve transmux\n// 25% was arbitrarily chosen, and may need to be refined over time.\n\nvar SEGMENT_END_FUDGE_PERCENT = 0.25;\n/**\n * Converts a player time (any time that can be gotten/set from player.currentTime(),\n * e.g., any time within player.seekable().start(0) to player.seekable().end(0)) to a\n * program time (any time referencing the real world (e.g., EXT-X-PROGRAM-DATE-TIME)).\n *\n * The containing segment is required as the EXT-X-PROGRAM-DATE-TIME serves as an \"anchor\n * point\" (a point where we have a mapping from program time to player time, with player\n * time being the post transmux start of the segment).\n *\n * For more details, see [this doc](../../docs/program-time-from-player-time.md).\n *\n * @param {number} playerTime the player time\n * @param {Object} segment the segment which contains the player time\n * @return {Date} program time\n */\n\nvar playerTimeToProgramTime = function playerTimeToProgramTime(playerTime, segment) {\n  if (!segment.dateTimeObject) {\n    // Can't convert without an \"anchor point\" for the program time (i.e., a time that can\n    // be used to map the start of a segment with a real world time).\n    return null;\n  }\n\n  var transmuxerPrependedSeconds = segment.videoTimingInfo.transmuxerPrependedSeconds;\n  var transmuxedStart = segment.videoTimingInfo.transmuxedPresentationStart; // get the start of the content from before old content is prepended\n\n  var startOfSegment = transmuxedStart + transmuxerPrependedSeconds;\n  var offsetFromSegmentStart = playerTime - startOfSegment;\n  return new Date(segment.dateTimeObject.getTime() + offsetFromSegmentStart * 1000);\n};\n\nvar originalSegmentVideoDuration = function originalSegmentVideoDuration(videoTimingInfo) {\n  return videoTimingInfo.transmuxedPresentationEnd - videoTimingInfo.transmuxedPresentationStart - videoTimingInfo.transmuxerPrependedSeconds;\n};\n/**\n * Finds a segment that contains the time requested given as an ISO-8601 string. The\n * returned segment might be an estimate or an accurate match.\n *\n * @param {string} programTime The ISO-8601 programTime to find a match for\n * @param {Object} playlist A playlist object to search within\n */\n\n\nvar findSegmentForProgramTime = function findSegmentForProgramTime(programTime, playlist) {\n  // Assumptions:\n  //  - verifyProgramDateTimeTags has already been run\n  //  - live streams have been started\n  var dateTimeObject;\n\n  try {\n    dateTimeObject = new Date(programTime);\n  } catch (e) {\n    return null;\n  }\n\n  if (!playlist || !playlist.segments || playlist.segments.length === 0) {\n    return null;\n  }\n\n  var segment = playlist.segments[0];\n\n  if (dateTimeObject < segment.dateTimeObject) {\n    // Requested time is before stream start.\n    return null;\n  }\n\n  for (var i = 0; i < playlist.segments.length - 1; i++) {\n    segment = playlist.segments[i];\n    var nextSegmentStart = playlist.segments[i + 1].dateTimeObject;\n\n    if (dateTimeObject < nextSegmentStart) {\n      break;\n    }\n  }\n\n  var lastSegment = playlist.segments[playlist.segments.length - 1];\n  var lastSegmentStart = lastSegment.dateTimeObject;\n  var lastSegmentDuration = lastSegment.videoTimingInfo ? originalSegmentVideoDuration(lastSegment.videoTimingInfo) : lastSegment.duration + lastSegment.duration * SEGMENT_END_FUDGE_PERCENT;\n  var lastSegmentEnd = new Date(lastSegmentStart.getTime() + lastSegmentDuration * 1000);\n\n  if (dateTimeObject > lastSegmentEnd) {\n    // Beyond the end of the stream, or our best guess of the end of the stream.\n    return null;\n  }\n\n  if (dateTimeObject > lastSegmentStart) {\n    segment = lastSegment;\n  }\n\n  return {\n    segment: segment,\n    estimatedStart: segment.videoTimingInfo ? segment.videoTimingInfo.transmuxedPresentationStart : Playlist.duration(playlist, playlist.mediaSequence + playlist.segments.indexOf(segment)),\n    // Although, given that all segments have accurate date time objects, the segment\n    // selected should be accurate, unless the video has been transmuxed at some point\n    // (determined by the presence of the videoTimingInfo object), the segment's \"player\n    // time\" (the start time in the player) can't be considered accurate.\n    type: segment.videoTimingInfo ? 'accurate' : 'estimate'\n  };\n};\n/**\n * Finds a segment that contains the given player time(in seconds).\n *\n * @param {number} time The player time to find a match for\n * @param {Object} playlist A playlist object to search within\n */\n\n\nvar findSegmentForPlayerTime = function findSegmentForPlayerTime(time, playlist) {\n  // Assumptions:\n  // - there will always be a segment.duration\n  // - we can start from zero\n  // - segments are in time order\n  if (!playlist || !playlist.segments || playlist.segments.length === 0) {\n    return null;\n  }\n\n  var segmentEnd = 0;\n  var segment;\n\n  for (var i = 0; i < playlist.segments.length; i++) {\n    segment = playlist.segments[i]; // videoTimingInfo is set after the segment is downloaded and transmuxed, and\n    // should contain the most accurate values we have for the segment's player times.\n    //\n    // Use the accurate transmuxedPresentationEnd value if it is available, otherwise fall\n    // back to an estimate based on the manifest derived (inaccurate) segment.duration, to\n    // calculate an end value.\n\n    segmentEnd = segment.videoTimingInfo ? segment.videoTimingInfo.transmuxedPresentationEnd : segmentEnd + segment.duration;\n\n    if (time <= segmentEnd) {\n      break;\n    }\n  }\n\n  var lastSegment = playlist.segments[playlist.segments.length - 1];\n\n  if (lastSegment.videoTimingInfo && lastSegment.videoTimingInfo.transmuxedPresentationEnd < time) {\n    // The time requested is beyond the stream end.\n    return null;\n  }\n\n  if (time > segmentEnd) {\n    // The time is within or beyond the last segment.\n    //\n    // Check to see if the time is beyond a reasonable guess of the end of the stream.\n    if (time > segmentEnd + lastSegment.duration * SEGMENT_END_FUDGE_PERCENT) {\n      // Technically, because the duration value is only an estimate, the time may still\n      // exist in the last segment, however, there isn't enough information to make even\n      // a reasonable estimate.\n      return null;\n    }\n\n    segment = lastSegment;\n  }\n\n  return {\n    segment: segment,\n    estimatedStart: segment.videoTimingInfo ? segment.videoTimingInfo.transmuxedPresentationStart : segmentEnd - segment.duration,\n    // Because videoTimingInfo is only set after transmux, it is the only way to get\n    // accurate timing values.\n    type: segment.videoTimingInfo ? 'accurate' : 'estimate'\n  };\n};\n/**\n * Gives the offset of the comparisonTimestamp from the programTime timestamp in seconds.\n * If the offset returned is positive, the programTime occurs after the\n * comparisonTimestamp.\n * If the offset is negative, the programTime occurs before the comparisonTimestamp.\n *\n * @param {string} comparisonTimeStamp An ISO-8601 timestamp to compare against\n * @param {string} programTime The programTime as an ISO-8601 string\n * @return {number} offset\n */\n\n\nvar getOffsetFromTimestamp = function getOffsetFromTimestamp(comparisonTimeStamp, programTime) {\n  var segmentDateTime;\n  var programDateTime;\n\n  try {\n    segmentDateTime = new Date(comparisonTimeStamp);\n    programDateTime = new Date(programTime);\n  } catch (e) {// TODO handle error\n  }\n\n  var segmentTimeEpoch = segmentDateTime.getTime();\n  var programTimeEpoch = programDateTime.getTime();\n  return (programTimeEpoch - segmentTimeEpoch) / 1000;\n};\n/**\n * Checks that all segments in this playlist have programDateTime tags.\n *\n * @param {Object} playlist A playlist object\n */\n\n\nvar verifyProgramDateTimeTags = function verifyProgramDateTimeTags(playlist) {\n  if (!playlist.segments || playlist.segments.length === 0) {\n    return false;\n  }\n\n  for (var i = 0; i < playlist.segments.length; i++) {\n    var segment = playlist.segments[i];\n\n    if (!segment.dateTimeObject) {\n      return false;\n    }\n  }\n\n  return true;\n};\n/**\n * Returns the programTime of the media given a playlist and a playerTime.\n * The playlist must have programDateTime tags for a programDateTime tag to be returned.\n * If the segments containing the time requested have not been buffered yet, an estimate\n * may be returned to the callback.\n *\n * @param {Object} args\n * @param {Object} args.playlist A playlist object to search within\n * @param {number} time A playerTime in seconds\n * @param {Function} callback(err, programTime)\n * @return {string} err.message A detailed error message\n * @return {Object} programTime\n * @return {number} programTime.mediaSeconds The streamTime in seconds\n * @return {string} programTime.programDateTime The programTime as an ISO-8601 String\n */\n\n\nvar getProgramTime = function getProgramTime(_ref) {\n  var playlist = _ref.playlist,\n      _ref$time = _ref.time,\n      time = _ref$time === void 0 ? undefined : _ref$time,\n      callback = _ref.callback;\n\n  if (!callback) {\n    throw new Error('getProgramTime: callback must be provided');\n  }\n\n  if (!playlist || time === undefined) {\n    return callback({\n      message: 'getProgramTime: playlist and time must be provided'\n    });\n  }\n\n  var matchedSegment = findSegmentForPlayerTime(time, playlist);\n\n  if (!matchedSegment) {\n    return callback({\n      message: 'valid programTime was not found'\n    });\n  }\n\n  if (matchedSegment.type === 'estimate') {\n    return callback({\n      message: 'Accurate programTime could not be determined.' + ' Please seek to e.seekTime and try again',\n      seekTime: matchedSegment.estimatedStart\n    });\n  }\n\n  var programTimeObject = {\n    mediaSeconds: time\n  };\n  var programTime = playerTimeToProgramTime(time, matchedSegment.segment);\n\n  if (programTime) {\n    programTimeObject.programDateTime = programTime.toISOString();\n  }\n\n  return callback(null, programTimeObject);\n};\n/**\n * Seeks in the player to a time that matches the given programTime ISO-8601 string.\n *\n * @param {Object} args\n * @param {string} args.programTime A programTime to seek to as an ISO-8601 String\n * @param {Object} args.playlist A playlist to look within\n * @param {number} args.retryCount The number of times to try for an accurate seek. Default is 2.\n * @param {Function} args.seekTo A method to perform a seek\n * @param {boolean} args.pauseAfterSeek Whether to end in a paused state after seeking. Default is true.\n * @param {Object} args.tech The tech to seek on\n * @param {Function} args.callback(err, newTime) A callback to return the new time to\n * @return {string} err.message A detailed error message\n * @return {number} newTime The exact time that was seeked to in seconds\n */\n\n\nvar seekToProgramTime = function seekToProgramTime(_ref2) {\n  var programTime = _ref2.programTime,\n      playlist = _ref2.playlist,\n      _ref2$retryCount = _ref2.retryCount,\n      retryCount = _ref2$retryCount === void 0 ? 2 : _ref2$retryCount,\n      seekTo = _ref2.seekTo,\n      _ref2$pauseAfterSeek = _ref2.pauseAfterSeek,\n      pauseAfterSeek = _ref2$pauseAfterSeek === void 0 ? true : _ref2$pauseAfterSeek,\n      tech = _ref2.tech,\n      callback = _ref2.callback;\n\n  if (!callback) {\n    throw new Error('seekToProgramTime: callback must be provided');\n  }\n\n  if (typeof programTime === 'undefined' || !playlist || !seekTo) {\n    return callback({\n      message: 'seekToProgramTime: programTime, seekTo and playlist must be provided'\n    });\n  }\n\n  if (!playlist.endList && !tech.hasStarted_) {\n    return callback({\n      message: 'player must be playing a live stream to start buffering'\n    });\n  }\n\n  if (!verifyProgramDateTimeTags(playlist)) {\n    return callback({\n      message: 'programDateTime tags must be provided in the manifest ' + playlist.resolvedUri\n    });\n  }\n\n  var matchedSegment = findSegmentForProgramTime(programTime, playlist); // no match\n\n  if (!matchedSegment) {\n    return callback({\n      message: programTime + \" was not found in the stream\"\n    });\n  }\n\n  var segment = matchedSegment.segment;\n  var mediaOffset = getOffsetFromTimestamp(segment.dateTimeObject, programTime);\n\n  if (matchedSegment.type === 'estimate') {\n    // we've run out of retries\n    if (retryCount === 0) {\n      return callback({\n        message: programTime + \" is not buffered yet. Try again\"\n      });\n    }\n\n    seekTo(matchedSegment.estimatedStart + mediaOffset);\n    tech.one('seeked', function () {\n      seekToProgramTime({\n        programTime: programTime,\n        playlist: playlist,\n        retryCount: retryCount - 1,\n        seekTo: seekTo,\n        pauseAfterSeek: pauseAfterSeek,\n        tech: tech,\n        callback: callback\n      });\n    });\n    return;\n  } // Since the segment.start value is determined from the buffered end or ending time\n  // of the prior segment, the seekToTime doesn't need to account for any transmuxer\n  // modifications.\n\n\n  var seekToTime = segment.start + mediaOffset;\n\n  var seekedCallback = function seekedCallback() {\n    return callback(null, tech.currentTime());\n  }; // listen for seeked event\n\n\n  tech.one('seeked', seekedCallback); // pause before seeking as video.js will restore this state\n\n  if (pauseAfterSeek) {\n    tech.pause();\n  }\n\n  seekTo(seekToTime);\n}; // which will only happen if the request is complete.\n\n\nvar callbackOnCompleted = function callbackOnCompleted(request, cb) {\n  if (request.readyState === 4) {\n    return cb();\n  }\n\n  return;\n};\n\nvar containerRequest = function containerRequest(uri, xhr, cb) {\n  var bytes = [];\n  var id3Offset;\n  var finished = false;\n\n  var endRequestAndCallback = function endRequestAndCallback(err, req, type, _bytes) {\n    req.abort();\n    finished = true;\n    return cb(err, req, type, _bytes);\n  };\n\n  var progressListener = function progressListener(error, request) {\n    if (finished) {\n      return;\n    }\n\n    if (error) {\n      return endRequestAndCallback(error, request, '', bytes);\n    } // grap the new part of content that was just downloaded\n\n\n    var newPart = request.responseText.substring(bytes && bytes.byteLength || 0, request.responseText.length); // add that onto bytes\n\n    bytes = concatTypedArrays(bytes, stringToBytes(newPart, true));\n    id3Offset = id3Offset || getId3Offset(bytes); // we need at least 10 bytes to determine a type\n    // or we need at least two bytes after an id3Offset\n\n    if (bytes.length < 10 || id3Offset && bytes.length < id3Offset + 2) {\n      return callbackOnCompleted(request, function () {\n        return endRequestAndCallback(error, request, '', bytes);\n      });\n    }\n\n    var type = detectContainerForBytes(bytes); // if this looks like a ts segment but we don't have enough data\n    // to see the second sync byte, wait until we have enough data\n    // before declaring it ts\n\n    if (type === 'ts' && bytes.length < 188) {\n      return callbackOnCompleted(request, function () {\n        return endRequestAndCallback(error, request, '', bytes);\n      });\n    } // this may be an unsynced ts segment\n    // wait for 376 bytes before detecting no container\n\n\n    if (!type && bytes.length < 376) {\n      return callbackOnCompleted(request, function () {\n        return endRequestAndCallback(error, request, '', bytes);\n      });\n    }\n\n    return endRequestAndCallback(null, request, type, bytes);\n  };\n\n  var options = {\n    uri: uri,\n    beforeSend: function beforeSend(request) {\n      // this forces the browser to pass the bytes to us unprocessed\n      request.overrideMimeType('text/plain; charset=x-user-defined');\n      request.addEventListener('progress', function (_ref) {\n        _ref.total;\n        _ref.loaded;\n        return callbackWrapper(request, null, {\n          statusCode: request.status\n        }, progressListener);\n      });\n    }\n  };\n  var request = xhr(options, function (error, response) {\n    return callbackWrapper(request, error, response, progressListener);\n  });\n  return request;\n};\n\nvar EventTarget = videojs.EventTarget,\n    mergeOptions = videojs.mergeOptions;\n\nvar dashPlaylistUnchanged = function dashPlaylistUnchanged(a, b) {\n  if (!isPlaylistUnchanged(a, b)) {\n    return false;\n  } // for dash the above check will often return true in scenarios where\n  // the playlist actually has changed because mediaSequence isn't a\n  // dash thing, and we often set it to 1. So if the playlists have the same amount\n  // of segments we return true.\n  // So for dash we need to make sure that the underlying segments are different.\n  // if sidx changed then the playlists are different.\n\n\n  if (a.sidx && b.sidx && (a.sidx.offset !== b.sidx.offset || a.sidx.length !== b.sidx.length)) {\n    return false;\n  } else if (!a.sidx && b.sidx || a.sidx && !b.sidx) {\n    return false;\n  } // one or the other does not have segments\n  // there was a change.\n\n\n  if (a.segments && !b.segments || !a.segments && b.segments) {\n    return false;\n  } // neither has segments nothing changed\n\n\n  if (!a.segments && !b.segments) {\n    return true;\n  } // check segments themselves\n\n\n  for (var i = 0; i < a.segments.length; i++) {\n    var aSegment = a.segments[i];\n    var bSegment = b.segments[i]; // if uris are different between segments there was a change\n\n    if (aSegment.uri !== bSegment.uri) {\n      return false;\n    } // neither segment has a byterange, there will be no byterange change.\n\n\n    if (!aSegment.byterange && !bSegment.byterange) {\n      continue;\n    }\n\n    var aByterange = aSegment.byterange;\n    var bByterange = bSegment.byterange; // if byterange only exists on one of the segments, there was a change.\n\n    if (aByterange && !bByterange || !aByterange && bByterange) {\n      return false;\n    } // if both segments have byterange with different offsets, there was a change.\n\n\n    if (aByterange.offset !== bByterange.offset || aByterange.length !== bByterange.length) {\n      return false;\n    }\n  } // if everything was the same with segments, this is the same playlist.\n\n\n  return true;\n};\n/**\n * Parses the master XML string and updates playlist URI references.\n *\n * @param {Object} config\n *        Object of arguments\n * @param {string} config.masterXml\n *        The mpd XML\n * @param {string} config.srcUrl\n *        The mpd URL\n * @param {Date} config.clientOffset\n *         A time difference between server and client\n * @param {Object} config.sidxMapping\n *        SIDX mappings for moof/mdat URIs and byte ranges\n * @return {Object}\n *         The parsed mpd manifest object\n */\n\n\nvar parseMasterXml = function parseMasterXml(_ref) {\n  var masterXml = _ref.masterXml,\n      srcUrl = _ref.srcUrl,\n      clientOffset = _ref.clientOffset,\n      sidxMapping = _ref.sidxMapping,\n      previousManifest = _ref.previousManifest;\n  var manifest = parse(masterXml, {\n    manifestUri: srcUrl,\n    clientOffset: clientOffset,\n    sidxMapping: sidxMapping,\n    previousManifest: previousManifest\n  });\n  addPropertiesToMaster(manifest, srcUrl);\n  return manifest;\n};\n/**\n * Returns a new master manifest that is the result of merging an updated master manifest\n * into the original version.\n *\n * @param {Object} oldMaster\n *        The old parsed mpd object\n * @param {Object} newMaster\n *        The updated parsed mpd object\n * @return {Object}\n *         A new object representing the original master manifest with the updated media\n *         playlists merged in\n */\n\n\nvar updateMaster = function updateMaster(oldMaster, newMaster, sidxMapping) {\n  var noChanges = true;\n  var update = mergeOptions(oldMaster, {\n    // These are top level properties that can be updated\n    duration: newMaster.duration,\n    minimumUpdatePeriod: newMaster.minimumUpdatePeriod,\n    timelineStarts: newMaster.timelineStarts\n  }); // First update the playlists in playlist list\n\n  for (var i = 0; i < newMaster.playlists.length; i++) {\n    var playlist = newMaster.playlists[i];\n\n    if (playlist.sidx) {\n      var sidxKey = generateSidxKey(playlist.sidx); // add sidx segments to the playlist if we have all the sidx info already\n\n      if (sidxMapping && sidxMapping[sidxKey] && sidxMapping[sidxKey].sidx) {\n        addSidxSegmentsToPlaylist(playlist, sidxMapping[sidxKey].sidx, playlist.sidx.resolvedUri);\n      }\n    }\n\n    var playlistUpdate = updateMaster$1(update, playlist, dashPlaylistUnchanged);\n\n    if (playlistUpdate) {\n      update = playlistUpdate;\n      noChanges = false;\n    }\n  } // Then update media group playlists\n\n\n  forEachMediaGroup(newMaster, function (properties, type, group, label) {\n    if (properties.playlists && properties.playlists.length) {\n      var id = properties.playlists[0].id;\n\n      var _playlistUpdate = updateMaster$1(update, properties.playlists[0], dashPlaylistUnchanged);\n\n      if (_playlistUpdate) {\n        update = _playlistUpdate; // update the playlist reference within media groups\n\n        update.mediaGroups[type][group][label].playlists[0] = update.playlists[id];\n        noChanges = false;\n      }\n    }\n  });\n\n  if (newMaster.minimumUpdatePeriod !== oldMaster.minimumUpdatePeriod) {\n    noChanges = false;\n  }\n\n  if (noChanges) {\n    return null;\n  }\n\n  return update;\n}; // SIDX should be equivalent if the URI and byteranges of the SIDX match.\n// If the SIDXs have maps, the two maps should match,\n// both `a` and `b` missing SIDXs is considered matching.\n// If `a` or `b` but not both have a map, they aren't matching.\n\n\nvar equivalentSidx = function equivalentSidx(a, b) {\n  var neitherMap = Boolean(!a.map && !b.map);\n  var equivalentMap = neitherMap || Boolean(a.map && b.map && a.map.byterange.offset === b.map.byterange.offset && a.map.byterange.length === b.map.byterange.length);\n  return equivalentMap && a.uri === b.uri && a.byterange.offset === b.byterange.offset && a.byterange.length === b.byterange.length;\n}; // exported for testing\n\n\nvar compareSidxEntry = function compareSidxEntry(playlists, oldSidxMapping) {\n  var newSidxMapping = {};\n\n  for (var id in playlists) {\n    var playlist = playlists[id];\n    var currentSidxInfo = playlist.sidx;\n\n    if (currentSidxInfo) {\n      var key = generateSidxKey(currentSidxInfo);\n\n      if (!oldSidxMapping[key]) {\n        break;\n      }\n\n      var savedSidxInfo = oldSidxMapping[key].sidxInfo;\n\n      if (equivalentSidx(savedSidxInfo, currentSidxInfo)) {\n        newSidxMapping[key] = oldSidxMapping[key];\n      }\n    }\n  }\n\n  return newSidxMapping;\n};\n/**\n *  A function that filters out changed items as they need to be requested separately.\n *\n *  The method is exported for testing\n *\n *  @param {Object} master the parsed mpd XML returned via mpd-parser\n *  @param {Object} oldSidxMapping the SIDX to compare against\n */\n\n\nvar filterChangedSidxMappings = function filterChangedSidxMappings(master, oldSidxMapping) {\n  var videoSidx = compareSidxEntry(master.playlists, oldSidxMapping);\n  var mediaGroupSidx = videoSidx;\n  forEachMediaGroup(master, function (properties, mediaType, groupKey, labelKey) {\n    if (properties.playlists && properties.playlists.length) {\n      var playlists = properties.playlists;\n      mediaGroupSidx = mergeOptions(mediaGroupSidx, compareSidxEntry(playlists, oldSidxMapping));\n    }\n  });\n  return mediaGroupSidx;\n};\n\nvar DashPlaylistLoader = /*#__PURE__*/function (_EventTarget) {\n  _inheritsLoose(DashPlaylistLoader, _EventTarget); // DashPlaylistLoader must accept either a src url or a playlist because subsequent\n  // playlist loader setups from media groups will expect to be able to pass a playlist\n  // (since there aren't external URLs to media playlists with DASH)\n\n\n  function DashPlaylistLoader(srcUrlOrPlaylist, vhs, options, masterPlaylistLoader) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    _this = _EventTarget.call(this) || this;\n    _this.masterPlaylistLoader_ = masterPlaylistLoader || _assertThisInitialized(_this);\n\n    if (!masterPlaylistLoader) {\n      _this.isMaster_ = true;\n    }\n\n    var _options = options,\n        _options$withCredenti = _options.withCredentials,\n        withCredentials = _options$withCredenti === void 0 ? false : _options$withCredenti,\n        _options$handleManife = _options.handleManifestRedirects,\n        handleManifestRedirects = _options$handleManife === void 0 ? false : _options$handleManife;\n    _this.vhs_ = vhs;\n    _this.withCredentials = withCredentials;\n    _this.handleManifestRedirects = handleManifestRedirects;\n\n    if (!srcUrlOrPlaylist) {\n      throw new Error('A non-empty playlist URL or object is required');\n    } // event naming?\n\n\n    _this.on('minimumUpdatePeriod', function () {\n      _this.refreshXml_();\n    }); // live playlist staleness timeout\n\n\n    _this.on('mediaupdatetimeout', function () {\n      _this.refreshMedia_(_this.media().id);\n    });\n\n    _this.state = 'HAVE_NOTHING';\n    _this.loadedPlaylists_ = {};\n    _this.logger_ = logger('DashPlaylistLoader'); // initialize the loader state\n    // The masterPlaylistLoader will be created with a string\n\n    if (_this.isMaster_) {\n      _this.masterPlaylistLoader_.srcUrl = srcUrlOrPlaylist; // TODO: reset sidxMapping between period changes\n      // once multi-period is refactored\n\n      _this.masterPlaylistLoader_.sidxMapping_ = {};\n    } else {\n      _this.childPlaylist_ = srcUrlOrPlaylist;\n    }\n\n    return _this;\n  }\n\n  var _proto = DashPlaylistLoader.prototype;\n\n  _proto.requestErrored_ = function requestErrored_(err, request, startingState) {\n    // disposed\n    if (!this.request) {\n      return true;\n    } // pending request is cleared\n\n\n    this.request = null;\n\n    if (err) {\n      // use the provided error object or create one\n      // based on the request/response\n      this.error = typeof err === 'object' && !(err instanceof Error) ? err : {\n        status: request.status,\n        message: 'DASH request error at URL: ' + request.uri,\n        response: request.response,\n        // MEDIA_ERR_NETWORK\n        code: 2\n      };\n\n      if (startingState) {\n        this.state = startingState;\n      }\n\n      this.trigger('error');\n      return true;\n    }\n  }\n  /**\n   * Verify that the container of the sidx segment can be parsed\n   * and if it can, get and parse that segment.\n   */\n  ;\n\n  _proto.addSidxSegments_ = function addSidxSegments_(playlist, startingState, cb) {\n    var _this2 = this;\n\n    var sidxKey = playlist.sidx && generateSidxKey(playlist.sidx); // playlist lacks sidx or sidx segments were added to this playlist already.\n\n    if (!playlist.sidx || !sidxKey || this.masterPlaylistLoader_.sidxMapping_[sidxKey]) {\n      // keep this function async\n      this.mediaRequest_ = window$1.setTimeout(function () {\n        return cb(false);\n      }, 0);\n      return;\n    } // resolve the segment URL relative to the playlist\n\n\n    var uri = resolveManifestRedirect(this.handleManifestRedirects, playlist.sidx.resolvedUri);\n\n    var fin = function fin(err, request) {\n      if (_this2.requestErrored_(err, request, startingState)) {\n        return;\n      }\n\n      var sidxMapping = _this2.masterPlaylistLoader_.sidxMapping_;\n      var sidx;\n\n      try {\n        sidx = parseSidx(toUint8(request.response).subarray(8));\n      } catch (e) {\n        // sidx parsing failed.\n        _this2.requestErrored_(e, request, startingState);\n\n        return;\n      }\n\n      sidxMapping[sidxKey] = {\n        sidxInfo: playlist.sidx,\n        sidx: sidx\n      };\n      addSidxSegmentsToPlaylist(playlist, sidx, playlist.sidx.resolvedUri);\n      return cb(true);\n    };\n\n    this.request = containerRequest(uri, this.vhs_.xhr, function (err, request, container, bytes) {\n      if (err) {\n        return fin(err, request);\n      }\n\n      if (!container || container !== 'mp4') {\n        return fin({\n          status: request.status,\n          message: \"Unsupported \" + (container || 'unknown') + \" container type for sidx segment at URL: \" + uri,\n          // response is just bytes in this case\n          // but we really don't want to return that.\n          response: '',\n          playlist: playlist,\n          internal: true,\n          blacklistDuration: Infinity,\n          // MEDIA_ERR_NETWORK\n          code: 2\n        }, request);\n      } // if we already downloaded the sidx bytes in the container request, use them\n\n\n      var _playlist$sidx$bytera = playlist.sidx.byterange,\n          offset = _playlist$sidx$bytera.offset,\n          length = _playlist$sidx$bytera.length;\n\n      if (bytes.length >= length + offset) {\n        return fin(err, {\n          response: bytes.subarray(offset, offset + length),\n          status: request.status,\n          uri: request.uri\n        });\n      } // otherwise request sidx bytes\n\n\n      _this2.request = _this2.vhs_.xhr({\n        uri: uri,\n        responseType: 'arraybuffer',\n        headers: segmentXhrHeaders({\n          byterange: playlist.sidx.byterange\n        })\n      }, fin);\n    });\n  };\n\n  _proto.dispose = function dispose() {\n    this.trigger('dispose');\n    this.stopRequest();\n    this.loadedPlaylists_ = {};\n    window$1.clearTimeout(this.minimumUpdatePeriodTimeout_);\n    window$1.clearTimeout(this.mediaRequest_);\n    window$1.clearTimeout(this.mediaUpdateTimeout);\n    this.mediaUpdateTimeout = null;\n    this.mediaRequest_ = null;\n    this.minimumUpdatePeriodTimeout_ = null;\n\n    if (this.masterPlaylistLoader_.createMupOnMedia_) {\n      this.off('loadedmetadata', this.masterPlaylistLoader_.createMupOnMedia_);\n      this.masterPlaylistLoader_.createMupOnMedia_ = null;\n    }\n\n    this.off();\n  };\n\n  _proto.hasPendingRequest = function hasPendingRequest() {\n    return this.request || this.mediaRequest_;\n  };\n\n  _proto.stopRequest = function stopRequest() {\n    if (this.request) {\n      var oldRequest = this.request;\n      this.request = null;\n      oldRequest.onreadystatechange = null;\n      oldRequest.abort();\n    }\n  };\n\n  _proto.media = function media(playlist) {\n    var _this3 = this; // getter\n\n\n    if (!playlist) {\n      return this.media_;\n    } // setter\n\n\n    if (this.state === 'HAVE_NOTHING') {\n      throw new Error('Cannot switch media playlist from ' + this.state);\n    }\n\n    var startingState = this.state; // find the playlist object if the target playlist has been specified by URI\n\n    if (typeof playlist === 'string') {\n      if (!this.masterPlaylistLoader_.master.playlists[playlist]) {\n        throw new Error('Unknown playlist URI: ' + playlist);\n      }\n\n      playlist = this.masterPlaylistLoader_.master.playlists[playlist];\n    }\n\n    var mediaChange = !this.media_ || playlist.id !== this.media_.id; // switch to previously loaded playlists immediately\n\n    if (mediaChange && this.loadedPlaylists_[playlist.id] && this.loadedPlaylists_[playlist.id].endList) {\n      this.state = 'HAVE_METADATA';\n      this.media_ = playlist; // trigger media change if the active media has been updated\n\n      if (mediaChange) {\n        this.trigger('mediachanging');\n        this.trigger('mediachange');\n      }\n\n      return;\n    } // switching to the active playlist is a no-op\n\n\n    if (!mediaChange) {\n      return;\n    } // switching from an already loaded playlist\n\n\n    if (this.media_) {\n      this.trigger('mediachanging');\n    }\n\n    this.addSidxSegments_(playlist, startingState, function (sidxChanged) {\n      // everything is ready just continue to haveMetadata\n      _this3.haveMetadata({\n        startingState: startingState,\n        playlist: playlist\n      });\n    });\n  };\n\n  _proto.haveMetadata = function haveMetadata(_ref2) {\n    var startingState = _ref2.startingState,\n        playlist = _ref2.playlist;\n    this.state = 'HAVE_METADATA';\n    this.loadedPlaylists_[playlist.id] = playlist;\n    this.mediaRequest_ = null; // This will trigger loadedplaylist\n\n    this.refreshMedia_(playlist.id); // fire loadedmetadata the first time a media playlist is loaded\n    // to resolve setup of media groups\n\n    if (startingState === 'HAVE_MASTER') {\n      this.trigger('loadedmetadata');\n    } else {\n      // trigger media change if the active media has been updated\n      this.trigger('mediachange');\n    }\n  };\n\n  _proto.pause = function pause() {\n    if (this.masterPlaylistLoader_.createMupOnMedia_) {\n      this.off('loadedmetadata', this.masterPlaylistLoader_.createMupOnMedia_);\n      this.masterPlaylistLoader_.createMupOnMedia_ = null;\n    }\n\n    this.stopRequest();\n    window$1.clearTimeout(this.mediaUpdateTimeout);\n    this.mediaUpdateTimeout = null;\n\n    if (this.isMaster_) {\n      window$1.clearTimeout(this.masterPlaylistLoader_.minimumUpdatePeriodTimeout_);\n      this.masterPlaylistLoader_.minimumUpdatePeriodTimeout_ = null;\n    }\n\n    if (this.state === 'HAVE_NOTHING') {\n      // If we pause the loader before any data has been retrieved, its as if we never\n      // started, so reset to an unstarted state.\n      this.started = false;\n    }\n  };\n\n  _proto.load = function load(isFinalRendition) {\n    var _this4 = this;\n\n    window$1.clearTimeout(this.mediaUpdateTimeout);\n    this.mediaUpdateTimeout = null;\n    var media = this.media();\n\n    if (isFinalRendition) {\n      var delay = media ? media.targetDuration / 2 * 1000 : 5 * 1000;\n      this.mediaUpdateTimeout = window$1.setTimeout(function () {\n        return _this4.load();\n      }, delay);\n      return;\n    } // because the playlists are internal to the manifest, load should either load the\n    // main manifest, or do nothing but trigger an event\n\n\n    if (!this.started) {\n      this.start();\n      return;\n    }\n\n    if (media && !media.endList) {\n      // Check to see if this is the master loader and the MUP was cleared (this happens\n      // when the loader was paused). `media` should be set at this point since one is always\n      // set during `start()`.\n      if (this.isMaster_ && !this.minimumUpdatePeriodTimeout_) {\n        // Trigger minimumUpdatePeriod to refresh the master manifest\n        this.trigger('minimumUpdatePeriod'); // Since there was no prior minimumUpdatePeriodTimeout it should be recreated\n\n        this.updateMinimumUpdatePeriodTimeout_();\n      }\n\n      this.trigger('mediaupdatetimeout');\n    } else {\n      this.trigger('loadedplaylist');\n    }\n  };\n\n  _proto.start = function start() {\n    var _this5 = this;\n\n    this.started = true; // We don't need to request the master manifest again\n    // Call this asynchronously to match the xhr request behavior below\n\n    if (!this.isMaster_) {\n      this.mediaRequest_ = window$1.setTimeout(function () {\n        return _this5.haveMaster_();\n      }, 0);\n      return;\n    }\n\n    this.requestMaster_(function (req, masterChanged) {\n      _this5.haveMaster_();\n\n      if (!_this5.hasPendingRequest() && !_this5.media_) {\n        _this5.media(_this5.masterPlaylistLoader_.master.playlists[0]);\n      }\n    });\n  };\n\n  _proto.requestMaster_ = function requestMaster_(cb) {\n    var _this6 = this;\n\n    this.request = this.vhs_.xhr({\n      uri: this.masterPlaylistLoader_.srcUrl,\n      withCredentials: this.withCredentials\n    }, function (error, req) {\n      if (_this6.requestErrored_(error, req)) {\n        if (_this6.state === 'HAVE_NOTHING') {\n          _this6.started = false;\n        }\n\n        return;\n      }\n\n      var masterChanged = req.responseText !== _this6.masterPlaylistLoader_.masterXml_;\n      _this6.masterPlaylistLoader_.masterXml_ = req.responseText;\n\n      if (req.responseHeaders && req.responseHeaders.date) {\n        _this6.masterLoaded_ = Date.parse(req.responseHeaders.date);\n      } else {\n        _this6.masterLoaded_ = Date.now();\n      }\n\n      _this6.masterPlaylistLoader_.srcUrl = resolveManifestRedirect(_this6.handleManifestRedirects, _this6.masterPlaylistLoader_.srcUrl, req);\n\n      if (masterChanged) {\n        _this6.handleMaster_();\n\n        _this6.syncClientServerClock_(function () {\n          return cb(req, masterChanged);\n        });\n\n        return;\n      }\n\n      return cb(req, masterChanged);\n    });\n  }\n  /**\n   * Parses the master xml for UTCTiming node to sync the client clock to the server\n   * clock. If the UTCTiming node requires a HEAD or GET request, that request is made.\n   *\n   * @param {Function} done\n   *        Function to call when clock sync has completed\n   */\n  ;\n\n  _proto.syncClientServerClock_ = function syncClientServerClock_(done) {\n    var _this7 = this;\n\n    var utcTiming = parseUTCTiming(this.masterPlaylistLoader_.masterXml_); // No UTCTiming element found in the mpd. Use Date header from mpd request as the\n    // server clock\n\n    if (utcTiming === null) {\n      this.masterPlaylistLoader_.clientOffset_ = this.masterLoaded_ - Date.now();\n      return done();\n    }\n\n    if (utcTiming.method === 'DIRECT') {\n      this.masterPlaylistLoader_.clientOffset_ = utcTiming.value - Date.now();\n      return done();\n    }\n\n    this.request = this.vhs_.xhr({\n      uri: resolveUrl(this.masterPlaylistLoader_.srcUrl, utcTiming.value),\n      method: utcTiming.method,\n      withCredentials: this.withCredentials\n    }, function (error, req) {\n      // disposed\n      if (!_this7.request) {\n        return;\n      }\n\n      if (error) {\n        // sync request failed, fall back to using date header from mpd\n        // TODO: log warning\n        _this7.masterPlaylistLoader_.clientOffset_ = _this7.masterLoaded_ - Date.now();\n        return done();\n      }\n\n      var serverTime;\n\n      if (utcTiming.method === 'HEAD') {\n        if (!req.responseHeaders || !req.responseHeaders.date) {\n          // expected date header not preset, fall back to using date header from mpd\n          // TODO: log warning\n          serverTime = _this7.masterLoaded_;\n        } else {\n          serverTime = Date.parse(req.responseHeaders.date);\n        }\n      } else {\n        serverTime = Date.parse(req.responseText);\n      }\n\n      _this7.masterPlaylistLoader_.clientOffset_ = serverTime - Date.now();\n      done();\n    });\n  };\n\n  _proto.haveMaster_ = function haveMaster_() {\n    this.state = 'HAVE_MASTER';\n\n    if (this.isMaster_) {\n      // We have the master playlist at this point, so\n      // trigger this to allow MasterPlaylistController\n      // to make an initial playlist selection\n      this.trigger('loadedplaylist');\n    } else if (!this.media_) {\n      // no media playlist was specifically selected so select\n      // the one the child playlist loader was created with\n      this.media(this.childPlaylist_);\n    }\n  };\n\n  _proto.handleMaster_ = function handleMaster_() {\n    // clear media request\n    this.mediaRequest_ = null;\n    var oldMaster = this.masterPlaylistLoader_.master;\n    var newMaster = parseMasterXml({\n      masterXml: this.masterPlaylistLoader_.masterXml_,\n      srcUrl: this.masterPlaylistLoader_.srcUrl,\n      clientOffset: this.masterPlaylistLoader_.clientOffset_,\n      sidxMapping: this.masterPlaylistLoader_.sidxMapping_,\n      previousManifest: oldMaster\n    }); // if we have an old master to compare the new master against\n\n    if (oldMaster) {\n      newMaster = updateMaster(oldMaster, newMaster, this.masterPlaylistLoader_.sidxMapping_);\n    } // only update master if we have a new master\n\n\n    this.masterPlaylistLoader_.master = newMaster ? newMaster : oldMaster;\n    var location = this.masterPlaylistLoader_.master.locations && this.masterPlaylistLoader_.master.locations[0];\n\n    if (location && location !== this.masterPlaylistLoader_.srcUrl) {\n      this.masterPlaylistLoader_.srcUrl = location;\n    }\n\n    if (!oldMaster || newMaster && newMaster.minimumUpdatePeriod !== oldMaster.minimumUpdatePeriod) {\n      this.updateMinimumUpdatePeriodTimeout_();\n    }\n\n    return Boolean(newMaster);\n  };\n\n  _proto.updateMinimumUpdatePeriodTimeout_ = function updateMinimumUpdatePeriodTimeout_() {\n    var mpl = this.masterPlaylistLoader_; // cancel any pending creation of mup on media\n    // a new one will be added if needed.\n\n    if (mpl.createMupOnMedia_) {\n      mpl.off('loadedmetadata', mpl.createMupOnMedia_);\n      mpl.createMupOnMedia_ = null;\n    } // clear any pending timeouts\n\n\n    if (mpl.minimumUpdatePeriodTimeout_) {\n      window$1.clearTimeout(mpl.minimumUpdatePeriodTimeout_);\n      mpl.minimumUpdatePeriodTimeout_ = null;\n    }\n\n    var mup = mpl.master && mpl.master.minimumUpdatePeriod; // If the minimumUpdatePeriod has a value of 0, that indicates that the current\n    // MPD has no future validity, so a new one will need to be acquired when new\n    // media segments are to be made available. Thus, we use the target duration\n    // in this case\n\n    if (mup === 0) {\n      if (mpl.media()) {\n        mup = mpl.media().targetDuration * 1000;\n      } else {\n        mpl.createMupOnMedia_ = mpl.updateMinimumUpdatePeriodTimeout_;\n        mpl.one('loadedmetadata', mpl.createMupOnMedia_);\n      }\n    } // if minimumUpdatePeriod is invalid or <= zero, which\n    // can happen when a live video becomes VOD. skip timeout\n    // creation.\n\n\n    if (typeof mup !== 'number' || mup <= 0) {\n      if (mup < 0) {\n        this.logger_(\"found invalid minimumUpdatePeriod of \" + mup + \", not setting a timeout\");\n      }\n\n      return;\n    }\n\n    this.createMUPTimeout_(mup);\n  };\n\n  _proto.createMUPTimeout_ = function createMUPTimeout_(mup) {\n    var mpl = this.masterPlaylistLoader_;\n    mpl.minimumUpdatePeriodTimeout_ = window$1.setTimeout(function () {\n      mpl.minimumUpdatePeriodTimeout_ = null;\n      mpl.trigger('minimumUpdatePeriod');\n      mpl.createMUPTimeout_(mup);\n    }, mup);\n  }\n  /**\n   * Sends request to refresh the master xml and updates the parsed master manifest\n   */\n  ;\n\n  _proto.refreshXml_ = function refreshXml_() {\n    var _this8 = this;\n\n    this.requestMaster_(function (req, masterChanged) {\n      if (!masterChanged) {\n        return;\n      }\n\n      if (_this8.media_) {\n        _this8.media_ = _this8.masterPlaylistLoader_.master.playlists[_this8.media_.id];\n      } // This will filter out updated sidx info from the mapping\n\n\n      _this8.masterPlaylistLoader_.sidxMapping_ = filterChangedSidxMappings(_this8.masterPlaylistLoader_.master, _this8.masterPlaylistLoader_.sidxMapping_);\n\n      _this8.addSidxSegments_(_this8.media(), _this8.state, function (sidxChanged) {\n        // TODO: do we need to reload the current playlist?\n        _this8.refreshMedia_(_this8.media().id);\n      });\n    });\n  }\n  /**\n   * Refreshes the media playlist by re-parsing the master xml and updating playlist\n   * references. If this is an alternate loader, the updated parsed manifest is retrieved\n   * from the master loader.\n   */\n  ;\n\n  _proto.refreshMedia_ = function refreshMedia_(mediaID) {\n    var _this9 = this;\n\n    if (!mediaID) {\n      throw new Error('refreshMedia_ must take a media id');\n    } // for master we have to reparse the master xml\n    // to re-create segments based on current timing values\n    // which may change media. We only skip updating master\n    // if this is the first time this.media_ is being set.\n    // as master was just parsed in that case.\n\n\n    if (this.media_ && this.isMaster_) {\n      this.handleMaster_();\n    }\n\n    var playlists = this.masterPlaylistLoader_.master.playlists;\n    var mediaChanged = !this.media_ || this.media_ !== playlists[mediaID];\n\n    if (mediaChanged) {\n      this.media_ = playlists[mediaID];\n    } else {\n      this.trigger('playlistunchanged');\n    }\n\n    if (!this.mediaUpdateTimeout) {\n      var createMediaUpdateTimeout = function createMediaUpdateTimeout() {\n        if (_this9.media().endList) {\n          return;\n        }\n\n        _this9.mediaUpdateTimeout = window$1.setTimeout(function () {\n          _this9.trigger('mediaupdatetimeout');\n\n          createMediaUpdateTimeout();\n        }, refreshDelay(_this9.media(), Boolean(mediaChanged)));\n      };\n\n      createMediaUpdateTimeout();\n    }\n\n    this.trigger('loadedplaylist');\n  };\n\n  return DashPlaylistLoader;\n}(EventTarget);\n\nvar Config = {\n  GOAL_BUFFER_LENGTH: 30,\n  MAX_GOAL_BUFFER_LENGTH: 60,\n  BACK_BUFFER_LENGTH: 30,\n  GOAL_BUFFER_LENGTH_RATE: 1,\n  // 0.5 MB/s\n  INITIAL_BANDWIDTH: 4194304,\n  // A fudge factor to apply to advertised playlist bitrates to account for\n  // temporary flucations in client bandwidth\n  BANDWIDTH_VARIANCE: 1.2,\n  // How much of the buffer must be filled before we consider upswitching\n  BUFFER_LOW_WATER_LINE: 0,\n  MAX_BUFFER_LOW_WATER_LINE: 30,\n  // TODO: Remove this when experimentalBufferBasedABR is removed\n  EXPERIMENTAL_MAX_BUFFER_LOW_WATER_LINE: 16,\n  BUFFER_LOW_WATER_LINE_RATE: 1,\n  // If the buffer is greater than the high water line, we won't switch down\n  BUFFER_HIGH_WATER_LINE: 30\n};\n\nvar stringToArrayBuffer = function stringToArrayBuffer(string) {\n  var view = new Uint8Array(new ArrayBuffer(string.length));\n\n  for (var i = 0; i < string.length; i++) {\n    view[i] = string.charCodeAt(i);\n  }\n\n  return view.buffer;\n};\n/* global Blob, BlobBuilder, Worker */\n// unify worker interface\n\n\nvar browserWorkerPolyFill = function browserWorkerPolyFill(workerObj) {\n  // node only supports on/off\n  workerObj.on = workerObj.addEventListener;\n  workerObj.off = workerObj.removeEventListener;\n  return workerObj;\n};\n\nvar createObjectURL = function createObjectURL(str) {\n  try {\n    return URL.createObjectURL(new Blob([str], {\n      type: 'application/javascript'\n    }));\n  } catch (e) {\n    var blob = new BlobBuilder();\n    blob.append(str);\n    return URL.createObjectURL(blob.getBlob());\n  }\n};\n\nvar factory = function factory(code) {\n  return function () {\n    var objectUrl = createObjectURL(code);\n    var worker = browserWorkerPolyFill(new Worker(objectUrl));\n    worker.objURL = objectUrl;\n    var terminate = worker.terminate;\n    worker.on = worker.addEventListener;\n    worker.off = worker.removeEventListener;\n\n    worker.terminate = function () {\n      URL.revokeObjectURL(objectUrl);\n      return terminate.call(this);\n    };\n\n    return worker;\n  };\n};\n\nvar transform = function transform(code) {\n  return \"var browserWorkerPolyFill = \" + browserWorkerPolyFill.toString() + \";\\n\" + 'browserWorkerPolyFill(self);\\n' + code;\n};\n\nvar getWorkerString = function getWorkerString(fn) {\n  return fn.toString().replace(/^function.+?{/, '').slice(0, -1);\n};\n/* rollup-plugin-worker-factory start for worker!/Users/gsinger/repos/clean/http-streaming/src/transmuxer-worker.js */\n\n\nvar workerCode$1 = transform(getWorkerString(function () {\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   *\n   * A lightweight readable stream implemention that handles event dispatching.\n   * Objects that inherit from streams should call init in their constructors.\n   */\n  var Stream = function Stream() {\n    this.init = function () {\n      var listeners = {};\n      /**\n       * Add a listener for a specified event type.\n       * @param type {string} the event name\n       * @param listener {function} the callback to be invoked when an event of\n       * the specified type occurs\n       */\n\n      this.on = function (type, listener) {\n        if (!listeners[type]) {\n          listeners[type] = [];\n        }\n\n        listeners[type] = listeners[type].concat(listener);\n      };\n      /**\n       * Remove a listener for a specified event type.\n       * @param type {string} the event name\n       * @param listener {function} a function previously registered for this\n       * type of event through `on`\n       */\n\n\n      this.off = function (type, listener) {\n        var index;\n\n        if (!listeners[type]) {\n          return false;\n        }\n\n        index = listeners[type].indexOf(listener);\n        listeners[type] = listeners[type].slice();\n        listeners[type].splice(index, 1);\n        return index > -1;\n      };\n      /**\n       * Trigger an event of the specified type on this stream. Any additional\n       * arguments to this function are passed as parameters to event listeners.\n       * @param type {string} the event name\n       */\n\n\n      this.trigger = function (type) {\n        var callbacks, i, length, args;\n        callbacks = listeners[type];\n\n        if (!callbacks) {\n          return;\n        } // Slicing the arguments on every invocation of this method\n        // can add a significant amount of overhead. Avoid the\n        // intermediate object creation for the common case of a\n        // single callback argument\n\n\n        if (arguments.length === 2) {\n          length = callbacks.length;\n\n          for (i = 0; i < length; ++i) {\n            callbacks[i].call(this, arguments[1]);\n          }\n        } else {\n          args = [];\n          i = arguments.length;\n\n          for (i = 1; i < arguments.length; ++i) {\n            args.push(arguments[i]);\n          }\n\n          length = callbacks.length;\n\n          for (i = 0; i < length; ++i) {\n            callbacks[i].apply(this, args);\n          }\n        }\n      };\n      /**\n       * Destroys the stream and cleans up.\n       */\n\n\n      this.dispose = function () {\n        listeners = {};\n      };\n    };\n  };\n  /**\n   * Forwards all `data` events on this stream to the destination stream. The\n   * destination stream should provide a method `push` to receive the data\n   * events as they arrive.\n   * @param destination {stream} the stream that will receive all `data` events\n   * @param autoFlush {boolean} if false, we will not call `flush` on the destination\n   *                            when the current stream emits a 'done' event\n   * @see http://nodejs.org/api/stream.html#stream_readable_pipe_destination_options\n   */\n\n\n  Stream.prototype.pipe = function (destination) {\n    this.on('data', function (data) {\n      destination.push(data);\n    });\n    this.on('done', function (flushSource) {\n      destination.flush(flushSource);\n    });\n    this.on('partialdone', function (flushSource) {\n      destination.partialFlush(flushSource);\n    });\n    this.on('endedtimeline', function (flushSource) {\n      destination.endTimeline(flushSource);\n    });\n    this.on('reset', function (flushSource) {\n      destination.reset(flushSource);\n    });\n    return destination;\n  }; // Default stream functions that are expected to be overridden to perform\n  // actual work. These are provided by the prototype as a sort of no-op\n  // implementation so that we don't have to check for their existence in the\n  // `pipe` function above.\n\n\n  Stream.prototype.push = function (data) {\n    this.trigger('data', data);\n  };\n\n  Stream.prototype.flush = function (flushSource) {\n    this.trigger('done', flushSource);\n  };\n\n  Stream.prototype.partialFlush = function (flushSource) {\n    this.trigger('partialdone', flushSource);\n  };\n\n  Stream.prototype.endTimeline = function (flushSource) {\n    this.trigger('endedtimeline', flushSource);\n  };\n\n  Stream.prototype.reset = function (flushSource) {\n    this.trigger('reset', flushSource);\n  };\n\n  var stream = Stream;\n  var MAX_UINT32$1 = Math.pow(2, 32);\n\n  var getUint64$2 = function getUint64(uint8) {\n    var dv = new DataView(uint8.buffer, uint8.byteOffset, uint8.byteLength);\n    var value;\n\n    if (dv.getBigUint64) {\n      value = dv.getBigUint64(0);\n\n      if (value < Number.MAX_SAFE_INTEGER) {\n        return Number(value);\n      }\n\n      return value;\n    }\n\n    return dv.getUint32(0) * MAX_UINT32$1 + dv.getUint32(4);\n  };\n\n  var numbers = {\n    getUint64: getUint64$2,\n    MAX_UINT32: MAX_UINT32$1\n  };\n  var MAX_UINT32 = numbers.MAX_UINT32;\n  var box, dinf, esds, ftyp, mdat, mfhd, minf, moof, moov, mvex, mvhd, trak, tkhd, mdia, mdhd, hdlr, sdtp, stbl, stsd, traf, trex, trun$1, types, MAJOR_BRAND, MINOR_VERSION, AVC1_BRAND, VIDEO_HDLR, AUDIO_HDLR, HDLR_TYPES, VMHD, SMHD, DREF, STCO, STSC, STSZ, STTS; // pre-calculate constants\n\n  (function () {\n    var i;\n    types = {\n      avc1: [],\n      // codingname\n      avcC: [],\n      btrt: [],\n      dinf: [],\n      dref: [],\n      esds: [],\n      ftyp: [],\n      hdlr: [],\n      mdat: [],\n      mdhd: [],\n      mdia: [],\n      mfhd: [],\n      minf: [],\n      moof: [],\n      moov: [],\n      mp4a: [],\n      // codingname\n      mvex: [],\n      mvhd: [],\n      pasp: [],\n      sdtp: [],\n      smhd: [],\n      stbl: [],\n      stco: [],\n      stsc: [],\n      stsd: [],\n      stsz: [],\n      stts: [],\n      styp: [],\n      tfdt: [],\n      tfhd: [],\n      traf: [],\n      trak: [],\n      trun: [],\n      trex: [],\n      tkhd: [],\n      vmhd: []\n    }; // In environments where Uint8Array is undefined (e.g., IE8), skip set up so that we\n    // don't throw an error\n\n    if (typeof Uint8Array === 'undefined') {\n      return;\n    }\n\n    for (i in types) {\n      if (types.hasOwnProperty(i)) {\n        types[i] = [i.charCodeAt(0), i.charCodeAt(1), i.charCodeAt(2), i.charCodeAt(3)];\n      }\n    }\n\n    MAJOR_BRAND = new Uint8Array(['i'.charCodeAt(0), 's'.charCodeAt(0), 'o'.charCodeAt(0), 'm'.charCodeAt(0)]);\n    AVC1_BRAND = new Uint8Array(['a'.charCodeAt(0), 'v'.charCodeAt(0), 'c'.charCodeAt(0), '1'.charCodeAt(0)]);\n    MINOR_VERSION = new Uint8Array([0, 0, 0, 1]);\n    VIDEO_HDLR = new Uint8Array([0x00, // version 0\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, 0x00, 0x00, // pre_defined\n    0x76, 0x69, 0x64, 0x65, // handler_type: 'vide'\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x56, 0x69, 0x64, 0x65, 0x6f, 0x48, 0x61, 0x6e, 0x64, 0x6c, 0x65, 0x72, 0x00 // name: 'VideoHandler'\n    ]);\n    AUDIO_HDLR = new Uint8Array([0x00, // version 0\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, 0x00, 0x00, // pre_defined\n    0x73, 0x6f, 0x75, 0x6e, // handler_type: 'soun'\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x53, 0x6f, 0x75, 0x6e, 0x64, 0x48, 0x61, 0x6e, 0x64, 0x6c, 0x65, 0x72, 0x00 // name: 'SoundHandler'\n    ]);\n    HDLR_TYPES = {\n      video: VIDEO_HDLR,\n      audio: AUDIO_HDLR\n    };\n    DREF = new Uint8Array([0x00, // version 0\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, 0x00, 0x01, // entry_count\n    0x00, 0x00, 0x00, 0x0c, // entry_size\n    0x75, 0x72, 0x6c, 0x20, // 'url' type\n    0x00, // version 0\n    0x00, 0x00, 0x01 // entry_flags\n    ]);\n    SMHD = new Uint8Array([0x00, // version\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, // balance, 0 means centered\n    0x00, 0x00 // reserved\n    ]);\n    STCO = new Uint8Array([0x00, // version\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, 0x00, 0x00 // entry_count\n    ]);\n    STSC = STCO;\n    STSZ = new Uint8Array([0x00, // version\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, 0x00, 0x00, // sample_size\n    0x00, 0x00, 0x00, 0x00 // sample_count\n    ]);\n    STTS = STCO;\n    VMHD = new Uint8Array([0x00, // version\n    0x00, 0x00, 0x01, // flags\n    0x00, 0x00, // graphicsmode\n    0x00, 0x00, 0x00, 0x00, 0x00, 0x00 // opcolor\n    ]);\n  })();\n\n  box = function box(type) {\n    var payload = [],\n        size = 0,\n        i,\n        result,\n        view;\n\n    for (i = 1; i < arguments.length; i++) {\n      payload.push(arguments[i]);\n    }\n\n    i = payload.length; // calculate the total size we need to allocate\n\n    while (i--) {\n      size += payload[i].byteLength;\n    }\n\n    result = new Uint8Array(size + 8);\n    view = new DataView(result.buffer, result.byteOffset, result.byteLength);\n    view.setUint32(0, result.byteLength);\n    result.set(type, 4); // copy the payload into the result\n\n    for (i = 0, size = 8; i < payload.length; i++) {\n      result.set(payload[i], size);\n      size += payload[i].byteLength;\n    }\n\n    return result;\n  };\n\n  dinf = function dinf() {\n    return box(types.dinf, box(types.dref, DREF));\n  };\n\n  esds = function esds(track) {\n    return box(types.esds, new Uint8Array([0x00, // version\n    0x00, 0x00, 0x00, // flags\n    // ES_Descriptor\n    0x03, // tag, ES_DescrTag\n    0x19, // length\n    0x00, 0x00, // ES_ID\n    0x00, // streamDependenceFlag, URL_flag, reserved, streamPriority\n    // DecoderConfigDescriptor\n    0x04, // tag, DecoderConfigDescrTag\n    0x11, // length\n    0x40, // object type\n    0x15, // streamType\n    0x00, 0x06, 0x00, // bufferSizeDB\n    0x00, 0x00, 0xda, 0xc0, // maxBitrate\n    0x00, 0x00, 0xda, 0xc0, // avgBitrate\n    // DecoderSpecificInfo\n    0x05, // tag, DecoderSpecificInfoTag\n    0x02, // length\n    // ISO/IEC 14496-3, AudioSpecificConfig\n    // for samplingFrequencyIndex see ISO/IEC 13818-7:2006, 8.1.3.2.2, Table 35\n    track.audioobjecttype << 3 | track.samplingfrequencyindex >>> 1, track.samplingfrequencyindex << 7 | track.channelcount << 3, 0x06, 0x01, 0x02 // GASpecificConfig\n    ]));\n  };\n\n  ftyp = function ftyp() {\n    return box(types.ftyp, MAJOR_BRAND, MINOR_VERSION, MAJOR_BRAND, AVC1_BRAND);\n  };\n\n  hdlr = function hdlr(type) {\n    return box(types.hdlr, HDLR_TYPES[type]);\n  };\n\n  mdat = function mdat(data) {\n    return box(types.mdat, data);\n  };\n\n  mdhd = function mdhd(track) {\n    var result = new Uint8Array([0x00, // version 0\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, 0x00, 0x02, // creation_time\n    0x00, 0x00, 0x00, 0x03, // modification_time\n    0x00, 0x01, 0x5f, 0x90, // timescale, 90,000 \"ticks\" per second\n    track.duration >>> 24 & 0xFF, track.duration >>> 16 & 0xFF, track.duration >>> 8 & 0xFF, track.duration & 0xFF, // duration\n    0x55, 0xc4, // 'und' language (undetermined)\n    0x00, 0x00]); // Use the sample rate from the track metadata, when it is\n    // defined. The sample rate can be parsed out of an ADTS header, for\n    // instance.\n\n    if (track.samplerate) {\n      result[12] = track.samplerate >>> 24 & 0xFF;\n      result[13] = track.samplerate >>> 16 & 0xFF;\n      result[14] = track.samplerate >>> 8 & 0xFF;\n      result[15] = track.samplerate & 0xFF;\n    }\n\n    return box(types.mdhd, result);\n  };\n\n  mdia = function mdia(track) {\n    return box(types.mdia, mdhd(track), hdlr(track.type), minf(track));\n  };\n\n  mfhd = function mfhd(sequenceNumber) {\n    return box(types.mfhd, new Uint8Array([0x00, 0x00, 0x00, 0x00, // flags\n    (sequenceNumber & 0xFF000000) >> 24, (sequenceNumber & 0xFF0000) >> 16, (sequenceNumber & 0xFF00) >> 8, sequenceNumber & 0xFF // sequence_number\n    ]));\n  };\n\n  minf = function minf(track) {\n    return box(types.minf, track.type === 'video' ? box(types.vmhd, VMHD) : box(types.smhd, SMHD), dinf(), stbl(track));\n  };\n\n  moof = function moof(sequenceNumber, tracks) {\n    var trackFragments = [],\n        i = tracks.length; // build traf boxes for each track fragment\n\n    while (i--) {\n      trackFragments[i] = traf(tracks[i]);\n    }\n\n    return box.apply(null, [types.moof, mfhd(sequenceNumber)].concat(trackFragments));\n  };\n  /**\n   * Returns a movie box.\n   * @param tracks {array} the tracks associated with this movie\n   * @see ISO/IEC 14496-12:2012(E), section 8.2.1\n   */\n\n\n  moov = function moov(tracks) {\n    var i = tracks.length,\n        boxes = [];\n\n    while (i--) {\n      boxes[i] = trak(tracks[i]);\n    }\n\n    return box.apply(null, [types.moov, mvhd(0xffffffff)].concat(boxes).concat(mvex(tracks)));\n  };\n\n  mvex = function mvex(tracks) {\n    var i = tracks.length,\n        boxes = [];\n\n    while (i--) {\n      boxes[i] = trex(tracks[i]);\n    }\n\n    return box.apply(null, [types.mvex].concat(boxes));\n  };\n\n  mvhd = function mvhd(duration) {\n    var bytes = new Uint8Array([0x00, // version 0\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, 0x00, 0x01, // creation_time\n    0x00, 0x00, 0x00, 0x02, // modification_time\n    0x00, 0x01, 0x5f, 0x90, // timescale, 90,000 \"ticks\" per second\n    (duration & 0xFF000000) >> 24, (duration & 0xFF0000) >> 16, (duration & 0xFF00) >> 8, duration & 0xFF, // duration\n    0x00, 0x01, 0x00, 0x00, // 1.0 rate\n    0x01, 0x00, // 1.0 volume\n    0x00, 0x00, // reserved\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, // transformation: unity matrix\n    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // pre_defined\n    0xff, 0xff, 0xff, 0xff // next_track_ID\n    ]);\n    return box(types.mvhd, bytes);\n  };\n\n  sdtp = function sdtp(track) {\n    var samples = track.samples || [],\n        bytes = new Uint8Array(4 + samples.length),\n        flags,\n        i; // leave the full box header (4 bytes) all zero\n    // write the sample table\n\n    for (i = 0; i < samples.length; i++) {\n      flags = samples[i].flags;\n      bytes[i + 4] = flags.dependsOn << 4 | flags.isDependedOn << 2 | flags.hasRedundancy;\n    }\n\n    return box(types.sdtp, bytes);\n  };\n\n  stbl = function stbl(track) {\n    return box(types.stbl, stsd(track), box(types.stts, STTS), box(types.stsc, STSC), box(types.stsz, STSZ), box(types.stco, STCO));\n  };\n\n  (function () {\n    var videoSample, audioSample;\n\n    stsd = function stsd(track) {\n      return box(types.stsd, new Uint8Array([0x00, // version 0\n      0x00, 0x00, 0x00, // flags\n      0x00, 0x00, 0x00, 0x01]), track.type === 'video' ? videoSample(track) : audioSample(track));\n    };\n\n    videoSample = function videoSample(track) {\n      var sps = track.sps || [],\n          pps = track.pps || [],\n          sequenceParameterSets = [],\n          pictureParameterSets = [],\n          i,\n          avc1Box; // assemble the SPSs\n\n      for (i = 0; i < sps.length; i++) {\n        sequenceParameterSets.push((sps[i].byteLength & 0xFF00) >>> 8);\n        sequenceParameterSets.push(sps[i].byteLength & 0xFF); // sequenceParameterSetLength\n\n        sequenceParameterSets = sequenceParameterSets.concat(Array.prototype.slice.call(sps[i])); // SPS\n      } // assemble the PPSs\n\n\n      for (i = 0; i < pps.length; i++) {\n        pictureParameterSets.push((pps[i].byteLength & 0xFF00) >>> 8);\n        pictureParameterSets.push(pps[i].byteLength & 0xFF);\n        pictureParameterSets = pictureParameterSets.concat(Array.prototype.slice.call(pps[i]));\n      }\n\n      avc1Box = [types.avc1, new Uint8Array([0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // reserved\n      0x00, 0x01, // data_reference_index\n      0x00, 0x00, // pre_defined\n      0x00, 0x00, // reserved\n      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // pre_defined\n      (track.width & 0xff00) >> 8, track.width & 0xff, // width\n      (track.height & 0xff00) >> 8, track.height & 0xff, // height\n      0x00, 0x48, 0x00, 0x00, // horizresolution\n      0x00, 0x48, 0x00, 0x00, // vertresolution\n      0x00, 0x00, 0x00, 0x00, // reserved\n      0x00, 0x01, // frame_count\n      0x13, 0x76, 0x69, 0x64, 0x65, 0x6f, 0x6a, 0x73, 0x2d, 0x63, 0x6f, 0x6e, 0x74, 0x72, 0x69, 0x62, 0x2d, 0x68, 0x6c, 0x73, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // compressorname\n      0x00, 0x18, // depth = 24\n      0x11, 0x11 // pre_defined = -1\n      ]), box(types.avcC, new Uint8Array([0x01, // configurationVersion\n      track.profileIdc, // AVCProfileIndication\n      track.profileCompatibility, // profile_compatibility\n      track.levelIdc, // AVCLevelIndication\n      0xff // lengthSizeMinusOne, hard-coded to 4 bytes\n      ].concat([sps.length], // numOfSequenceParameterSets\n      sequenceParameterSets, // \"SPS\"\n      [pps.length], // numOfPictureParameterSets\n      pictureParameterSets // \"PPS\"\n      ))), box(types.btrt, new Uint8Array([0x00, 0x1c, 0x9c, 0x80, // bufferSizeDB\n      0x00, 0x2d, 0xc6, 0xc0, // maxBitrate\n      0x00, 0x2d, 0xc6, 0xc0 // avgBitrate\n      ]))];\n\n      if (track.sarRatio) {\n        var hSpacing = track.sarRatio[0],\n            vSpacing = track.sarRatio[1];\n        avc1Box.push(box(types.pasp, new Uint8Array([(hSpacing & 0xFF000000) >> 24, (hSpacing & 0xFF0000) >> 16, (hSpacing & 0xFF00) >> 8, hSpacing & 0xFF, (vSpacing & 0xFF000000) >> 24, (vSpacing & 0xFF0000) >> 16, (vSpacing & 0xFF00) >> 8, vSpacing & 0xFF])));\n      }\n\n      return box.apply(null, avc1Box);\n    };\n\n    audioSample = function audioSample(track) {\n      return box(types.mp4a, new Uint8Array([// SampleEntry, ISO/IEC 14496-12\n      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // reserved\n      0x00, 0x01, // data_reference_index\n      // AudioSampleEntry, ISO/IEC 14496-12\n      0x00, 0x00, 0x00, 0x00, // reserved\n      0x00, 0x00, 0x00, 0x00, // reserved\n      (track.channelcount & 0xff00) >> 8, track.channelcount & 0xff, // channelcount\n      (track.samplesize & 0xff00) >> 8, track.samplesize & 0xff, // samplesize\n      0x00, 0x00, // pre_defined\n      0x00, 0x00, // reserved\n      (track.samplerate & 0xff00) >> 8, track.samplerate & 0xff, 0x00, 0x00 // samplerate, 16.16\n      // MP4AudioSampleEntry, ISO/IEC 14496-14\n      ]), esds(track));\n    };\n  })();\n\n  tkhd = function tkhd(track) {\n    var result = new Uint8Array([0x00, // version 0\n    0x00, 0x00, 0x07, // flags\n    0x00, 0x00, 0x00, 0x00, // creation_time\n    0x00, 0x00, 0x00, 0x00, // modification_time\n    (track.id & 0xFF000000) >> 24, (track.id & 0xFF0000) >> 16, (track.id & 0xFF00) >> 8, track.id & 0xFF, // track_ID\n    0x00, 0x00, 0x00, 0x00, // reserved\n    (track.duration & 0xFF000000) >> 24, (track.duration & 0xFF0000) >> 16, (track.duration & 0xFF00) >> 8, track.duration & 0xFF, // duration\n    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // reserved\n    0x00, 0x00, // layer\n    0x00, 0x00, // alternate_group\n    0x01, 0x00, // non-audio track volume\n    0x00, 0x00, // reserved\n    0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, // transformation: unity matrix\n    (track.width & 0xFF00) >> 8, track.width & 0xFF, 0x00, 0x00, // width\n    (track.height & 0xFF00) >> 8, track.height & 0xFF, 0x00, 0x00 // height\n    ]);\n    return box(types.tkhd, result);\n  };\n  /**\n   * Generate a track fragment (traf) box. A traf box collects metadata\n   * about tracks in a movie fragment (moof) box.\n   */\n\n\n  traf = function traf(track) {\n    var trackFragmentHeader, trackFragmentDecodeTime, trackFragmentRun, sampleDependencyTable, dataOffset, upperWordBaseMediaDecodeTime, lowerWordBaseMediaDecodeTime;\n    trackFragmentHeader = box(types.tfhd, new Uint8Array([0x00, // version 0\n    0x00, 0x00, 0x3a, // flags\n    (track.id & 0xFF000000) >> 24, (track.id & 0xFF0000) >> 16, (track.id & 0xFF00) >> 8, track.id & 0xFF, // track_ID\n    0x00, 0x00, 0x00, 0x01, // sample_description_index\n    0x00, 0x00, 0x00, 0x00, // default_sample_duration\n    0x00, 0x00, 0x00, 0x00, // default_sample_size\n    0x00, 0x00, 0x00, 0x00 // default_sample_flags\n    ]));\n    upperWordBaseMediaDecodeTime = Math.floor(track.baseMediaDecodeTime / MAX_UINT32);\n    lowerWordBaseMediaDecodeTime = Math.floor(track.baseMediaDecodeTime % MAX_UINT32);\n    trackFragmentDecodeTime = box(types.tfdt, new Uint8Array([0x01, // version 1\n    0x00, 0x00, 0x00, // flags\n    // baseMediaDecodeTime\n    upperWordBaseMediaDecodeTime >>> 24 & 0xFF, upperWordBaseMediaDecodeTime >>> 16 & 0xFF, upperWordBaseMediaDecodeTime >>> 8 & 0xFF, upperWordBaseMediaDecodeTime & 0xFF, lowerWordBaseMediaDecodeTime >>> 24 & 0xFF, lowerWordBaseMediaDecodeTime >>> 16 & 0xFF, lowerWordBaseMediaDecodeTime >>> 8 & 0xFF, lowerWordBaseMediaDecodeTime & 0xFF])); // the data offset specifies the number of bytes from the start of\n    // the containing moof to the first payload byte of the associated\n    // mdat\n\n    dataOffset = 32 + // tfhd\n    20 + // tfdt\n    8 + // traf header\n    16 + // mfhd\n    8 + // moof header\n    8; // mdat header\n    // audio tracks require less metadata\n\n    if (track.type === 'audio') {\n      trackFragmentRun = trun$1(track, dataOffset);\n      return box(types.traf, trackFragmentHeader, trackFragmentDecodeTime, trackFragmentRun);\n    } // video tracks should contain an independent and disposable samples\n    // box (sdtp)\n    // generate one and adjust offsets to match\n\n\n    sampleDependencyTable = sdtp(track);\n    trackFragmentRun = trun$1(track, sampleDependencyTable.length + dataOffset);\n    return box(types.traf, trackFragmentHeader, trackFragmentDecodeTime, trackFragmentRun, sampleDependencyTable);\n  };\n  /**\n   * Generate a track box.\n   * @param track {object} a track definition\n   * @return {Uint8Array} the track box\n   */\n\n\n  trak = function trak(track) {\n    track.duration = track.duration || 0xffffffff;\n    return box(types.trak, tkhd(track), mdia(track));\n  };\n\n  trex = function trex(track) {\n    var result = new Uint8Array([0x00, // version 0\n    0x00, 0x00, 0x00, // flags\n    (track.id & 0xFF000000) >> 24, (track.id & 0xFF0000) >> 16, (track.id & 0xFF00) >> 8, track.id & 0xFF, // track_ID\n    0x00, 0x00, 0x00, 0x01, // default_sample_description_index\n    0x00, 0x00, 0x00, 0x00, // default_sample_duration\n    0x00, 0x00, 0x00, 0x00, // default_sample_size\n    0x00, 0x01, 0x00, 0x01 // default_sample_flags\n    ]); // the last two bytes of default_sample_flags is the sample\n    // degradation priority, a hint about the importance of this sample\n    // relative to others. Lower the degradation priority for all sample\n    // types other than video.\n\n    if (track.type !== 'video') {\n      result[result.length - 1] = 0x00;\n    }\n\n    return box(types.trex, result);\n  };\n\n  (function () {\n    var audioTrun, videoTrun, trunHeader; // This method assumes all samples are uniform. That is, if a\n    // duration is present for the first sample, it will be present for\n    // all subsequent samples.\n    // see ISO/IEC 14496-12:2012, Section 8.8.8.1\n\n    trunHeader = function trunHeader(samples, offset) {\n      var durationPresent = 0,\n          sizePresent = 0,\n          flagsPresent = 0,\n          compositionTimeOffset = 0; // trun flag constants\n\n      if (samples.length) {\n        if (samples[0].duration !== undefined) {\n          durationPresent = 0x1;\n        }\n\n        if (samples[0].size !== undefined) {\n          sizePresent = 0x2;\n        }\n\n        if (samples[0].flags !== undefined) {\n          flagsPresent = 0x4;\n        }\n\n        if (samples[0].compositionTimeOffset !== undefined) {\n          compositionTimeOffset = 0x8;\n        }\n      }\n\n      return [0x00, // version 0\n      0x00, durationPresent | sizePresent | flagsPresent | compositionTimeOffset, 0x01, // flags\n      (samples.length & 0xFF000000) >>> 24, (samples.length & 0xFF0000) >>> 16, (samples.length & 0xFF00) >>> 8, samples.length & 0xFF, // sample_count\n      (offset & 0xFF000000) >>> 24, (offset & 0xFF0000) >>> 16, (offset & 0xFF00) >>> 8, offset & 0xFF // data_offset\n      ];\n    };\n\n    videoTrun = function videoTrun(track, offset) {\n      var bytesOffest, bytes, header, samples, sample, i;\n      samples = track.samples || [];\n      offset += 8 + 12 + 16 * samples.length;\n      header = trunHeader(samples, offset);\n      bytes = new Uint8Array(header.length + samples.length * 16);\n      bytes.set(header);\n      bytesOffest = header.length;\n\n      for (i = 0; i < samples.length; i++) {\n        sample = samples[i];\n        bytes[bytesOffest++] = (sample.duration & 0xFF000000) >>> 24;\n        bytes[bytesOffest++] = (sample.duration & 0xFF0000) >>> 16;\n        bytes[bytesOffest++] = (sample.duration & 0xFF00) >>> 8;\n        bytes[bytesOffest++] = sample.duration & 0xFF; // sample_duration\n\n        bytes[bytesOffest++] = (sample.size & 0xFF000000) >>> 24;\n        bytes[bytesOffest++] = (sample.size & 0xFF0000) >>> 16;\n        bytes[bytesOffest++] = (sample.size & 0xFF00) >>> 8;\n        bytes[bytesOffest++] = sample.size & 0xFF; // sample_size\n\n        bytes[bytesOffest++] = sample.flags.isLeading << 2 | sample.flags.dependsOn;\n        bytes[bytesOffest++] = sample.flags.isDependedOn << 6 | sample.flags.hasRedundancy << 4 | sample.flags.paddingValue << 1 | sample.flags.isNonSyncSample;\n        bytes[bytesOffest++] = sample.flags.degradationPriority & 0xF0 << 8;\n        bytes[bytesOffest++] = sample.flags.degradationPriority & 0x0F; // sample_flags\n\n        bytes[bytesOffest++] = (sample.compositionTimeOffset & 0xFF000000) >>> 24;\n        bytes[bytesOffest++] = (sample.compositionTimeOffset & 0xFF0000) >>> 16;\n        bytes[bytesOffest++] = (sample.compositionTimeOffset & 0xFF00) >>> 8;\n        bytes[bytesOffest++] = sample.compositionTimeOffset & 0xFF; // sample_composition_time_offset\n      }\n\n      return box(types.trun, bytes);\n    };\n\n    audioTrun = function audioTrun(track, offset) {\n      var bytes, bytesOffest, header, samples, sample, i;\n      samples = track.samples || [];\n      offset += 8 + 12 + 8 * samples.length;\n      header = trunHeader(samples, offset);\n      bytes = new Uint8Array(header.length + samples.length * 8);\n      bytes.set(header);\n      bytesOffest = header.length;\n\n      for (i = 0; i < samples.length; i++) {\n        sample = samples[i];\n        bytes[bytesOffest++] = (sample.duration & 0xFF000000) >>> 24;\n        bytes[bytesOffest++] = (sample.duration & 0xFF0000) >>> 16;\n        bytes[bytesOffest++] = (sample.duration & 0xFF00) >>> 8;\n        bytes[bytesOffest++] = sample.duration & 0xFF; // sample_duration\n\n        bytes[bytesOffest++] = (sample.size & 0xFF000000) >>> 24;\n        bytes[bytesOffest++] = (sample.size & 0xFF0000) >>> 16;\n        bytes[bytesOffest++] = (sample.size & 0xFF00) >>> 8;\n        bytes[bytesOffest++] = sample.size & 0xFF; // sample_size\n      }\n\n      return box(types.trun, bytes);\n    };\n\n    trun$1 = function trun(track, offset) {\n      if (track.type === 'audio') {\n        return audioTrun(track, offset);\n      }\n\n      return videoTrun(track, offset);\n    };\n  })();\n\n  var mp4Generator = {\n    ftyp: ftyp,\n    mdat: mdat,\n    moof: moof,\n    moov: moov,\n    initSegment: function initSegment(tracks) {\n      var fileType = ftyp(),\n          movie = moov(tracks),\n          result;\n      result = new Uint8Array(fileType.byteLength + movie.byteLength);\n      result.set(fileType);\n      result.set(movie, fileType.byteLength);\n      return result;\n    }\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   */\n  // Convert an array of nal units into an array of frames with each frame being\n  // composed of the nal units that make up that frame\n  // Also keep track of cummulative data about the frame from the nal units such\n  // as the frame duration, starting pts, etc.\n\n  var groupNalsIntoFrames = function groupNalsIntoFrames(nalUnits) {\n    var i,\n        currentNal,\n        currentFrame = [],\n        frames = []; // TODO added for LHLS, make sure this is OK\n\n    frames.byteLength = 0;\n    frames.nalCount = 0;\n    frames.duration = 0;\n    currentFrame.byteLength = 0;\n\n    for (i = 0; i < nalUnits.length; i++) {\n      currentNal = nalUnits[i]; // Split on 'aud'-type nal units\n\n      if (currentNal.nalUnitType === 'access_unit_delimiter_rbsp') {\n        // Since the very first nal unit is expected to be an AUD\n        // only push to the frames array when currentFrame is not empty\n        if (currentFrame.length) {\n          currentFrame.duration = currentNal.dts - currentFrame.dts; // TODO added for LHLS, make sure this is OK\n\n          frames.byteLength += currentFrame.byteLength;\n          frames.nalCount += currentFrame.length;\n          frames.duration += currentFrame.duration;\n          frames.push(currentFrame);\n        }\n\n        currentFrame = [currentNal];\n        currentFrame.byteLength = currentNal.data.byteLength;\n        currentFrame.pts = currentNal.pts;\n        currentFrame.dts = currentNal.dts;\n      } else {\n        // Specifically flag key frames for ease of use later\n        if (currentNal.nalUnitType === 'slice_layer_without_partitioning_rbsp_idr') {\n          currentFrame.keyFrame = true;\n        }\n\n        currentFrame.duration = currentNal.dts - currentFrame.dts;\n        currentFrame.byteLength += currentNal.data.byteLength;\n        currentFrame.push(currentNal);\n      }\n    } // For the last frame, use the duration of the previous frame if we\n    // have nothing better to go on\n\n\n    if (frames.length && (!currentFrame.duration || currentFrame.duration <= 0)) {\n      currentFrame.duration = frames[frames.length - 1].duration;\n    } // Push the final frame\n    // TODO added for LHLS, make sure this is OK\n\n\n    frames.byteLength += currentFrame.byteLength;\n    frames.nalCount += currentFrame.length;\n    frames.duration += currentFrame.duration;\n    frames.push(currentFrame);\n    return frames;\n  }; // Convert an array of frames into an array of Gop with each Gop being composed\n  // of the frames that make up that Gop\n  // Also keep track of cummulative data about the Gop from the frames such as the\n  // Gop duration, starting pts, etc.\n\n\n  var groupFramesIntoGops = function groupFramesIntoGops(frames) {\n    var i,\n        currentFrame,\n        currentGop = [],\n        gops = []; // We must pre-set some of the values on the Gop since we\n    // keep running totals of these values\n\n    currentGop.byteLength = 0;\n    currentGop.nalCount = 0;\n    currentGop.duration = 0;\n    currentGop.pts = frames[0].pts;\n    currentGop.dts = frames[0].dts; // store some metadata about all the Gops\n\n    gops.byteLength = 0;\n    gops.nalCount = 0;\n    gops.duration = 0;\n    gops.pts = frames[0].pts;\n    gops.dts = frames[0].dts;\n\n    for (i = 0; i < frames.length; i++) {\n      currentFrame = frames[i];\n\n      if (currentFrame.keyFrame) {\n        // Since the very first frame is expected to be an keyframe\n        // only push to the gops array when currentGop is not empty\n        if (currentGop.length) {\n          gops.push(currentGop);\n          gops.byteLength += currentGop.byteLength;\n          gops.nalCount += currentGop.nalCount;\n          gops.duration += currentGop.duration;\n        }\n\n        currentGop = [currentFrame];\n        currentGop.nalCount = currentFrame.length;\n        currentGop.byteLength = currentFrame.byteLength;\n        currentGop.pts = currentFrame.pts;\n        currentGop.dts = currentFrame.dts;\n        currentGop.duration = currentFrame.duration;\n      } else {\n        currentGop.duration += currentFrame.duration;\n        currentGop.nalCount += currentFrame.length;\n        currentGop.byteLength += currentFrame.byteLength;\n        currentGop.push(currentFrame);\n      }\n    }\n\n    if (gops.length && currentGop.duration <= 0) {\n      currentGop.duration = gops[gops.length - 1].duration;\n    }\n\n    gops.byteLength += currentGop.byteLength;\n    gops.nalCount += currentGop.nalCount;\n    gops.duration += currentGop.duration; // push the final Gop\n\n    gops.push(currentGop);\n    return gops;\n  };\n  /*\n   * Search for the first keyframe in the GOPs and throw away all frames\n   * until that keyframe. Then extend the duration of the pulled keyframe\n   * and pull the PTS and DTS of the keyframe so that it covers the time\n   * range of the frames that were disposed.\n   *\n   * @param {Array} gops video GOPs\n   * @returns {Array} modified video GOPs\n   */\n\n\n  var extendFirstKeyFrame = function extendFirstKeyFrame(gops) {\n    var currentGop;\n\n    if (!gops[0][0].keyFrame && gops.length > 1) {\n      // Remove the first GOP\n      currentGop = gops.shift();\n      gops.byteLength -= currentGop.byteLength;\n      gops.nalCount -= currentGop.nalCount; // Extend the first frame of what is now the\n      // first gop to cover the time period of the\n      // frames we just removed\n\n      gops[0][0].dts = currentGop.dts;\n      gops[0][0].pts = currentGop.pts;\n      gops[0][0].duration += currentGop.duration;\n    }\n\n    return gops;\n  };\n  /**\n   * Default sample object\n   * see ISO/IEC 14496-12:2012, section 8.6.4.3\n   */\n\n\n  var createDefaultSample = function createDefaultSample() {\n    return {\n      size: 0,\n      flags: {\n        isLeading: 0,\n        dependsOn: 1,\n        isDependedOn: 0,\n        hasRedundancy: 0,\n        degradationPriority: 0,\n        isNonSyncSample: 1\n      }\n    };\n  };\n  /*\n   * Collates information from a video frame into an object for eventual\n   * entry into an MP4 sample table.\n   *\n   * @param {Object} frame the video frame\n   * @param {Number} dataOffset the byte offset to position the sample\n   * @return {Object} object containing sample table info for a frame\n   */\n\n\n  var sampleForFrame = function sampleForFrame(frame, dataOffset) {\n    var sample = createDefaultSample();\n    sample.dataOffset = dataOffset;\n    sample.compositionTimeOffset = frame.pts - frame.dts;\n    sample.duration = frame.duration;\n    sample.size = 4 * frame.length; // Space for nal unit size\n\n    sample.size += frame.byteLength;\n\n    if (frame.keyFrame) {\n      sample.flags.dependsOn = 2;\n      sample.flags.isNonSyncSample = 0;\n    }\n\n    return sample;\n  }; // generate the track's sample table from an array of gops\n\n\n  var generateSampleTable$1 = function generateSampleTable(gops, baseDataOffset) {\n    var h,\n        i,\n        sample,\n        currentGop,\n        currentFrame,\n        dataOffset = baseDataOffset || 0,\n        samples = [];\n\n    for (h = 0; h < gops.length; h++) {\n      currentGop = gops[h];\n\n      for (i = 0; i < currentGop.length; i++) {\n        currentFrame = currentGop[i];\n        sample = sampleForFrame(currentFrame, dataOffset);\n        dataOffset += sample.size;\n        samples.push(sample);\n      }\n    }\n\n    return samples;\n  }; // generate the track's raw mdat data from an array of gops\n\n\n  var concatenateNalData = function concatenateNalData(gops) {\n    var h,\n        i,\n        j,\n        currentGop,\n        currentFrame,\n        currentNal,\n        dataOffset = 0,\n        nalsByteLength = gops.byteLength,\n        numberOfNals = gops.nalCount,\n        totalByteLength = nalsByteLength + 4 * numberOfNals,\n        data = new Uint8Array(totalByteLength),\n        view = new DataView(data.buffer); // For each Gop..\n\n    for (h = 0; h < gops.length; h++) {\n      currentGop = gops[h]; // For each Frame..\n\n      for (i = 0; i < currentGop.length; i++) {\n        currentFrame = currentGop[i]; // For each NAL..\n\n        for (j = 0; j < currentFrame.length; j++) {\n          currentNal = currentFrame[j];\n          view.setUint32(dataOffset, currentNal.data.byteLength);\n          dataOffset += 4;\n          data.set(currentNal.data, dataOffset);\n          dataOffset += currentNal.data.byteLength;\n        }\n      }\n    }\n\n    return data;\n  }; // generate the track's sample table from a frame\n\n\n  var generateSampleTableForFrame = function generateSampleTableForFrame(frame, baseDataOffset) {\n    var sample,\n        dataOffset = baseDataOffset || 0,\n        samples = [];\n    sample = sampleForFrame(frame, dataOffset);\n    samples.push(sample);\n    return samples;\n  }; // generate the track's raw mdat data from a frame\n\n\n  var concatenateNalDataForFrame = function concatenateNalDataForFrame(frame) {\n    var i,\n        currentNal,\n        dataOffset = 0,\n        nalsByteLength = frame.byteLength,\n        numberOfNals = frame.length,\n        totalByteLength = nalsByteLength + 4 * numberOfNals,\n        data = new Uint8Array(totalByteLength),\n        view = new DataView(data.buffer); // For each NAL..\n\n    for (i = 0; i < frame.length; i++) {\n      currentNal = frame[i];\n      view.setUint32(dataOffset, currentNal.data.byteLength);\n      dataOffset += 4;\n      data.set(currentNal.data, dataOffset);\n      dataOffset += currentNal.data.byteLength;\n    }\n\n    return data;\n  };\n\n  var frameUtils = {\n    groupNalsIntoFrames: groupNalsIntoFrames,\n    groupFramesIntoGops: groupFramesIntoGops,\n    extendFirstKeyFrame: extendFirstKeyFrame,\n    generateSampleTable: generateSampleTable$1,\n    concatenateNalData: concatenateNalData,\n    generateSampleTableForFrame: generateSampleTableForFrame,\n    concatenateNalDataForFrame: concatenateNalDataForFrame\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   */\n\n  var highPrefix = [33, 16, 5, 32, 164, 27];\n  var lowPrefix = [33, 65, 108, 84, 1, 2, 4, 8, 168, 2, 4, 8, 17, 191, 252];\n\n  var zeroFill = function zeroFill(count) {\n    var a = [];\n\n    while (count--) {\n      a.push(0);\n    }\n\n    return a;\n  };\n\n  var makeTable = function makeTable(metaTable) {\n    return Object.keys(metaTable).reduce(function (obj, key) {\n      obj[key] = new Uint8Array(metaTable[key].reduce(function (arr, part) {\n        return arr.concat(part);\n      }, []));\n      return obj;\n    }, {});\n  };\n\n  var silence;\n\n  var silence_1 = function silence_1() {\n    if (!silence) {\n      // Frames-of-silence to use for filling in missing AAC frames\n      var coneOfSilence = {\n        96000: [highPrefix, [227, 64], zeroFill(154), [56]],\n        88200: [highPrefix, [231], zeroFill(170), [56]],\n        64000: [highPrefix, [248, 192], zeroFill(240), [56]],\n        48000: [highPrefix, [255, 192], zeroFill(268), [55, 148, 128], zeroFill(54), [112]],\n        44100: [highPrefix, [255, 192], zeroFill(268), [55, 163, 128], zeroFill(84), [112]],\n        32000: [highPrefix, [255, 192], zeroFill(268), [55, 234], zeroFill(226), [112]],\n        24000: [highPrefix, [255, 192], zeroFill(268), [55, 255, 128], zeroFill(268), [111, 112], zeroFill(126), [224]],\n        16000: [highPrefix, [255, 192], zeroFill(268), [55, 255, 128], zeroFill(268), [111, 255], zeroFill(269), [223, 108], zeroFill(195), [1, 192]],\n        12000: [lowPrefix, zeroFill(268), [3, 127, 248], zeroFill(268), [6, 255, 240], zeroFill(268), [13, 255, 224], zeroFill(268), [27, 253, 128], zeroFill(259), [56]],\n        11025: [lowPrefix, zeroFill(268), [3, 127, 248], zeroFill(268), [6, 255, 240], zeroFill(268), [13, 255, 224], zeroFill(268), [27, 255, 192], zeroFill(268), [55, 175, 128], zeroFill(108), [112]],\n        8000: [lowPrefix, zeroFill(268), [3, 121, 16], zeroFill(47), [7]]\n      };\n      silence = makeTable(coneOfSilence);\n    }\n\n    return silence;\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   */\n\n\n  var ONE_SECOND_IN_TS$4 = 90000,\n      // 90kHz clock\n  secondsToVideoTs,\n      secondsToAudioTs,\n      videoTsToSeconds,\n      audioTsToSeconds,\n      audioTsToVideoTs,\n      videoTsToAudioTs,\n      metadataTsToSeconds;\n\n  secondsToVideoTs = function secondsToVideoTs(seconds) {\n    return seconds * ONE_SECOND_IN_TS$4;\n  };\n\n  secondsToAudioTs = function secondsToAudioTs(seconds, sampleRate) {\n    return seconds * sampleRate;\n  };\n\n  videoTsToSeconds = function videoTsToSeconds(timestamp) {\n    return timestamp / ONE_SECOND_IN_TS$4;\n  };\n\n  audioTsToSeconds = function audioTsToSeconds(timestamp, sampleRate) {\n    return timestamp / sampleRate;\n  };\n\n  audioTsToVideoTs = function audioTsToVideoTs(timestamp, sampleRate) {\n    return secondsToVideoTs(audioTsToSeconds(timestamp, sampleRate));\n  };\n\n  videoTsToAudioTs = function videoTsToAudioTs(timestamp, sampleRate) {\n    return secondsToAudioTs(videoTsToSeconds(timestamp), sampleRate);\n  };\n  /**\n   * Adjust ID3 tag or caption timing information by the timeline pts values\n   * (if keepOriginalTimestamps is false) and convert to seconds\n   */\n\n\n  metadataTsToSeconds = function metadataTsToSeconds(timestamp, timelineStartPts, keepOriginalTimestamps) {\n    return videoTsToSeconds(keepOriginalTimestamps ? timestamp : timestamp - timelineStartPts);\n  };\n\n  var clock = {\n    ONE_SECOND_IN_TS: ONE_SECOND_IN_TS$4,\n    secondsToVideoTs: secondsToVideoTs,\n    secondsToAudioTs: secondsToAudioTs,\n    videoTsToSeconds: videoTsToSeconds,\n    audioTsToSeconds: audioTsToSeconds,\n    audioTsToVideoTs: audioTsToVideoTs,\n    videoTsToAudioTs: videoTsToAudioTs,\n    metadataTsToSeconds: metadataTsToSeconds\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   */\n\n  /**\n   * Sum the `byteLength` properties of the data in each AAC frame\n   */\n\n  var sumFrameByteLengths = function sumFrameByteLengths(array) {\n    var i,\n        currentObj,\n        sum = 0; // sum the byteLength's all each nal unit in the frame\n\n    for (i = 0; i < array.length; i++) {\n      currentObj = array[i];\n      sum += currentObj.data.byteLength;\n    }\n\n    return sum;\n  }; // Possibly pad (prefix) the audio track with silence if appending this track\n  // would lead to the introduction of a gap in the audio buffer\n\n\n  var prefixWithSilence = function prefixWithSilence(track, frames, audioAppendStartTs, videoBaseMediaDecodeTime) {\n    var baseMediaDecodeTimeTs,\n        frameDuration = 0,\n        audioGapDuration = 0,\n        audioFillFrameCount = 0,\n        audioFillDuration = 0,\n        silentFrame,\n        i,\n        firstFrame;\n\n    if (!frames.length) {\n      return;\n    }\n\n    baseMediaDecodeTimeTs = clock.audioTsToVideoTs(track.baseMediaDecodeTime, track.samplerate); // determine frame clock duration based on sample rate, round up to avoid overfills\n\n    frameDuration = Math.ceil(clock.ONE_SECOND_IN_TS / (track.samplerate / 1024));\n\n    if (audioAppendStartTs && videoBaseMediaDecodeTime) {\n      // insert the shortest possible amount (audio gap or audio to video gap)\n      audioGapDuration = baseMediaDecodeTimeTs - Math.max(audioAppendStartTs, videoBaseMediaDecodeTime); // number of full frames in the audio gap\n\n      audioFillFrameCount = Math.floor(audioGapDuration / frameDuration);\n      audioFillDuration = audioFillFrameCount * frameDuration;\n    } // don't attempt to fill gaps smaller than a single frame or larger\n    // than a half second\n\n\n    if (audioFillFrameCount < 1 || audioFillDuration > clock.ONE_SECOND_IN_TS / 2) {\n      return;\n    }\n\n    silentFrame = silence_1()[track.samplerate];\n\n    if (!silentFrame) {\n      // we don't have a silent frame pregenerated for the sample rate, so use a frame\n      // from the content instead\n      silentFrame = frames[0].data;\n    }\n\n    for (i = 0; i < audioFillFrameCount; i++) {\n      firstFrame = frames[0];\n      frames.splice(0, 0, {\n        data: silentFrame,\n        dts: firstFrame.dts - frameDuration,\n        pts: firstFrame.pts - frameDuration\n      });\n    }\n\n    track.baseMediaDecodeTime -= Math.floor(clock.videoTsToAudioTs(audioFillDuration, track.samplerate));\n    return audioFillDuration;\n  }; // If the audio segment extends before the earliest allowed dts\n  // value, remove AAC frames until starts at or after the earliest\n  // allowed DTS so that we don't end up with a negative baseMedia-\n  // DecodeTime for the audio track\n\n\n  var trimAdtsFramesByEarliestDts = function trimAdtsFramesByEarliestDts(adtsFrames, track, earliestAllowedDts) {\n    if (track.minSegmentDts >= earliestAllowedDts) {\n      return adtsFrames;\n    } // We will need to recalculate the earliest segment Dts\n\n\n    track.minSegmentDts = Infinity;\n    return adtsFrames.filter(function (currentFrame) {\n      // If this is an allowed frame, keep it and record it's Dts\n      if (currentFrame.dts >= earliestAllowedDts) {\n        track.minSegmentDts = Math.min(track.minSegmentDts, currentFrame.dts);\n        track.minSegmentPts = track.minSegmentDts;\n        return true;\n      } // Otherwise, discard it\n\n\n      return false;\n    });\n  }; // generate the track's raw mdat data from an array of frames\n\n\n  var generateSampleTable = function generateSampleTable(frames) {\n    var i,\n        currentFrame,\n        samples = [];\n\n    for (i = 0; i < frames.length; i++) {\n      currentFrame = frames[i];\n      samples.push({\n        size: currentFrame.data.byteLength,\n        duration: 1024 // For AAC audio, all samples contain 1024 samples\n\n      });\n    }\n\n    return samples;\n  }; // generate the track's sample table from an array of frames\n\n\n  var concatenateFrameData = function concatenateFrameData(frames) {\n    var i,\n        currentFrame,\n        dataOffset = 0,\n        data = new Uint8Array(sumFrameByteLengths(frames));\n\n    for (i = 0; i < frames.length; i++) {\n      currentFrame = frames[i];\n      data.set(currentFrame.data, dataOffset);\n      dataOffset += currentFrame.data.byteLength;\n    }\n\n    return data;\n  };\n\n  var audioFrameUtils = {\n    prefixWithSilence: prefixWithSilence,\n    trimAdtsFramesByEarliestDts: trimAdtsFramesByEarliestDts,\n    generateSampleTable: generateSampleTable,\n    concatenateFrameData: concatenateFrameData\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   */\n\n  var ONE_SECOND_IN_TS$3 = clock.ONE_SECOND_IN_TS;\n  /**\n   * Store information about the start and end of the track and the\n   * duration for each frame/sample we process in order to calculate\n   * the baseMediaDecodeTime\n   */\n\n  var collectDtsInfo = function collectDtsInfo(track, data) {\n    if (typeof data.pts === 'number') {\n      if (track.timelineStartInfo.pts === undefined) {\n        track.timelineStartInfo.pts = data.pts;\n      }\n\n      if (track.minSegmentPts === undefined) {\n        track.minSegmentPts = data.pts;\n      } else {\n        track.minSegmentPts = Math.min(track.minSegmentPts, data.pts);\n      }\n\n      if (track.maxSegmentPts === undefined) {\n        track.maxSegmentPts = data.pts;\n      } else {\n        track.maxSegmentPts = Math.max(track.maxSegmentPts, data.pts);\n      }\n    }\n\n    if (typeof data.dts === 'number') {\n      if (track.timelineStartInfo.dts === undefined) {\n        track.timelineStartInfo.dts = data.dts;\n      }\n\n      if (track.minSegmentDts === undefined) {\n        track.minSegmentDts = data.dts;\n      } else {\n        track.minSegmentDts = Math.min(track.minSegmentDts, data.dts);\n      }\n\n      if (track.maxSegmentDts === undefined) {\n        track.maxSegmentDts = data.dts;\n      } else {\n        track.maxSegmentDts = Math.max(track.maxSegmentDts, data.dts);\n      }\n    }\n  };\n  /**\n   * Clear values used to calculate the baseMediaDecodeTime between\n   * tracks\n   */\n\n\n  var clearDtsInfo = function clearDtsInfo(track) {\n    delete track.minSegmentDts;\n    delete track.maxSegmentDts;\n    delete track.minSegmentPts;\n    delete track.maxSegmentPts;\n  };\n  /**\n   * Calculate the track's baseMediaDecodeTime based on the earliest\n   * DTS the transmuxer has ever seen and the minimum DTS for the\n   * current track\n   * @param track {object} track metadata configuration\n   * @param keepOriginalTimestamps {boolean} If true, keep the timestamps\n   *        in the source; false to adjust the first segment to start at 0.\n   */\n\n\n  var calculateTrackBaseMediaDecodeTime = function calculateTrackBaseMediaDecodeTime(track, keepOriginalTimestamps) {\n    var baseMediaDecodeTime,\n        scale,\n        minSegmentDts = track.minSegmentDts; // Optionally adjust the time so the first segment starts at zero.\n\n    if (!keepOriginalTimestamps) {\n      minSegmentDts -= track.timelineStartInfo.dts;\n    } // track.timelineStartInfo.baseMediaDecodeTime is the location, in time, where\n    // we want the start of the first segment to be placed\n\n\n    baseMediaDecodeTime = track.timelineStartInfo.baseMediaDecodeTime; // Add to that the distance this segment is from the very first\n\n    baseMediaDecodeTime += minSegmentDts; // baseMediaDecodeTime must not become negative\n\n    baseMediaDecodeTime = Math.max(0, baseMediaDecodeTime);\n\n    if (track.type === 'audio') {\n      // Audio has a different clock equal to the sampling_rate so we need to\n      // scale the PTS values into the clock rate of the track\n      scale = track.samplerate / ONE_SECOND_IN_TS$3;\n      baseMediaDecodeTime *= scale;\n      baseMediaDecodeTime = Math.floor(baseMediaDecodeTime);\n    }\n\n    return baseMediaDecodeTime;\n  };\n\n  var trackDecodeInfo = {\n    clearDtsInfo: clearDtsInfo,\n    calculateTrackBaseMediaDecodeTime: calculateTrackBaseMediaDecodeTime,\n    collectDtsInfo: collectDtsInfo\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   *\n   * Reads in-band caption information from a video elementary\n   * stream. Captions must follow the CEA-708 standard for injection\n   * into an MPEG-2 transport streams.\n   * @see https://en.wikipedia.org/wiki/CEA-708\n   * @see https://www.gpo.gov/fdsys/pkg/CFR-2007-title47-vol1/pdf/CFR-2007-title47-vol1-sec15-119.pdf\n   */\n  // payload type field to indicate how they are to be\n  // interpreted. CEAS-708 caption content is always transmitted with\n  // payload type 0x04.\n\n  var USER_DATA_REGISTERED_ITU_T_T35 = 4,\n      RBSP_TRAILING_BITS = 128;\n  /**\n    * Parse a supplemental enhancement information (SEI) NAL unit.\n    * Stops parsing once a message of type ITU T T35 has been found.\n    *\n    * @param bytes {Uint8Array} the bytes of a SEI NAL unit\n    * @return {object} the parsed SEI payload\n    * @see Rec. ITU-T H.264, 7.3.2.3.1\n    */\n\n  var parseSei = function parseSei(bytes) {\n    var i = 0,\n        result = {\n      payloadType: -1,\n      payloadSize: 0\n    },\n        payloadType = 0,\n        payloadSize = 0; // go through the sei_rbsp parsing each each individual sei_message\n\n    while (i < bytes.byteLength) {\n      // stop once we have hit the end of the sei_rbsp\n      if (bytes[i] === RBSP_TRAILING_BITS) {\n        break;\n      } // Parse payload type\n\n\n      while (bytes[i] === 0xFF) {\n        payloadType += 255;\n        i++;\n      }\n\n      payloadType += bytes[i++]; // Parse payload size\n\n      while (bytes[i] === 0xFF) {\n        payloadSize += 255;\n        i++;\n      }\n\n      payloadSize += bytes[i++]; // this sei_message is a 608/708 caption so save it and break\n      // there can only ever be one caption message in a frame's sei\n\n      if (!result.payload && payloadType === USER_DATA_REGISTERED_ITU_T_T35) {\n        var userIdentifier = String.fromCharCode(bytes[i + 3], bytes[i + 4], bytes[i + 5], bytes[i + 6]);\n\n        if (userIdentifier === 'GA94') {\n          result.payloadType = payloadType;\n          result.payloadSize = payloadSize;\n          result.payload = bytes.subarray(i, i + payloadSize);\n          break;\n        } else {\n          result.payload = void 0;\n        }\n      } // skip the payload and parse the next message\n\n\n      i += payloadSize;\n      payloadType = 0;\n      payloadSize = 0;\n    }\n\n    return result;\n  }; // see ANSI/SCTE 128-1 (2013), section 8.1\n\n\n  var parseUserData = function parseUserData(sei) {\n    // itu_t_t35_contry_code must be 181 (United States) for\n    // captions\n    if (sei.payload[0] !== 181) {\n      return null;\n    } // itu_t_t35_provider_code should be 49 (ATSC) for captions\n\n\n    if ((sei.payload[1] << 8 | sei.payload[2]) !== 49) {\n      return null;\n    } // the user_identifier should be \"GA94\" to indicate ATSC1 data\n\n\n    if (String.fromCharCode(sei.payload[3], sei.payload[4], sei.payload[5], sei.payload[6]) !== 'GA94') {\n      return null;\n    } // finally, user_data_type_code should be 0x03 for caption data\n\n\n    if (sei.payload[7] !== 0x03) {\n      return null;\n    } // return the user_data_type_structure and strip the trailing\n    // marker bits\n\n\n    return sei.payload.subarray(8, sei.payload.length - 1);\n  }; // see CEA-708-D, section 4.4\n\n\n  var parseCaptionPackets = function parseCaptionPackets(pts, userData) {\n    var results = [],\n        i,\n        count,\n        offset,\n        data; // if this is just filler, return immediately\n\n    if (!(userData[0] & 0x40)) {\n      return results;\n    } // parse out the cc_data_1 and cc_data_2 fields\n\n\n    count = userData[0] & 0x1f;\n\n    for (i = 0; i < count; i++) {\n      offset = i * 3;\n      data = {\n        type: userData[offset + 2] & 0x03,\n        pts: pts\n      }; // capture cc data when cc_valid is 1\n\n      if (userData[offset + 2] & 0x04) {\n        data.ccData = userData[offset + 3] << 8 | userData[offset + 4];\n        results.push(data);\n      }\n    }\n\n    return results;\n  };\n\n  var discardEmulationPreventionBytes$1 = function discardEmulationPreventionBytes(data) {\n    var length = data.byteLength,\n        emulationPreventionBytesPositions = [],\n        i = 1,\n        newLength,\n        newData; // Find all `Emulation Prevention Bytes`\n\n    while (i < length - 2) {\n      if (data[i] === 0 && data[i + 1] === 0 && data[i + 2] === 0x03) {\n        emulationPreventionBytesPositions.push(i + 2);\n        i += 2;\n      } else {\n        i++;\n      }\n    } // If no Emulation Prevention Bytes were found just return the original\n    // array\n\n\n    if (emulationPreventionBytesPositions.length === 0) {\n      return data;\n    } // Create a new array to hold the NAL unit data\n\n\n    newLength = length - emulationPreventionBytesPositions.length;\n    newData = new Uint8Array(newLength);\n    var sourceIndex = 0;\n\n    for (i = 0; i < newLength; sourceIndex++, i++) {\n      if (sourceIndex === emulationPreventionBytesPositions[0]) {\n        // Skip this byte\n        sourceIndex++; // Remove this position index\n\n        emulationPreventionBytesPositions.shift();\n      }\n\n      newData[i] = data[sourceIndex];\n    }\n\n    return newData;\n  }; // exports\n\n\n  var captionPacketParser = {\n    parseSei: parseSei,\n    parseUserData: parseUserData,\n    parseCaptionPackets: parseCaptionPackets,\n    discardEmulationPreventionBytes: discardEmulationPreventionBytes$1,\n    USER_DATA_REGISTERED_ITU_T_T35: USER_DATA_REGISTERED_ITU_T_T35\n  }; // Link To Transport\n  // -----------------\n\n  var CaptionStream$1 = function CaptionStream(options) {\n    options = options || {};\n    CaptionStream.prototype.init.call(this); // parse708captions flag, default to true\n\n    this.parse708captions_ = typeof options.parse708captions === 'boolean' ? options.parse708captions : true;\n    this.captionPackets_ = [];\n    this.ccStreams_ = [new Cea608Stream(0, 0), // eslint-disable-line no-use-before-define\n    new Cea608Stream(0, 1), // eslint-disable-line no-use-before-define\n    new Cea608Stream(1, 0), // eslint-disable-line no-use-before-define\n    new Cea608Stream(1, 1) // eslint-disable-line no-use-before-define\n    ];\n\n    if (this.parse708captions_) {\n      this.cc708Stream_ = new Cea708Stream({\n        captionServices: options.captionServices\n      }); // eslint-disable-line no-use-before-define\n    }\n\n    this.reset(); // forward data and done events from CCs to this CaptionStream\n\n    this.ccStreams_.forEach(function (cc) {\n      cc.on('data', this.trigger.bind(this, 'data'));\n      cc.on('partialdone', this.trigger.bind(this, 'partialdone'));\n      cc.on('done', this.trigger.bind(this, 'done'));\n    }, this);\n\n    if (this.parse708captions_) {\n      this.cc708Stream_.on('data', this.trigger.bind(this, 'data'));\n      this.cc708Stream_.on('partialdone', this.trigger.bind(this, 'partialdone'));\n      this.cc708Stream_.on('done', this.trigger.bind(this, 'done'));\n    }\n  };\n\n  CaptionStream$1.prototype = new stream();\n\n  CaptionStream$1.prototype.push = function (event) {\n    var sei, userData, newCaptionPackets; // only examine SEI NALs\n\n    if (event.nalUnitType !== 'sei_rbsp') {\n      return;\n    } // parse the sei\n\n\n    sei = captionPacketParser.parseSei(event.escapedRBSP); // no payload data, skip\n\n    if (!sei.payload) {\n      return;\n    } // ignore everything but user_data_registered_itu_t_t35\n\n\n    if (sei.payloadType !== captionPacketParser.USER_DATA_REGISTERED_ITU_T_T35) {\n      return;\n    } // parse out the user data payload\n\n\n    userData = captionPacketParser.parseUserData(sei); // ignore unrecognized userData\n\n    if (!userData) {\n      return;\n    } // Sometimes, the same segment # will be downloaded twice. To stop the\n    // caption data from being processed twice, we track the latest dts we've\n    // received and ignore everything with a dts before that. However, since\n    // data for a specific dts can be split across packets on either side of\n    // a segment boundary, we need to make sure we *don't* ignore the packets\n    // from the *next* segment that have dts === this.latestDts_. By constantly\n    // tracking the number of packets received with dts === this.latestDts_, we\n    // know how many should be ignored once we start receiving duplicates.\n\n\n    if (event.dts < this.latestDts_) {\n      // We've started getting older data, so set the flag.\n      this.ignoreNextEqualDts_ = true;\n      return;\n    } else if (event.dts === this.latestDts_ && this.ignoreNextEqualDts_) {\n      this.numSameDts_--;\n\n      if (!this.numSameDts_) {\n        // We've received the last duplicate packet, time to start processing again\n        this.ignoreNextEqualDts_ = false;\n      }\n\n      return;\n    } // parse out CC data packets and save them for later\n\n\n    newCaptionPackets = captionPacketParser.parseCaptionPackets(event.pts, userData);\n    this.captionPackets_ = this.captionPackets_.concat(newCaptionPackets);\n\n    if (this.latestDts_ !== event.dts) {\n      this.numSameDts_ = 0;\n    }\n\n    this.numSameDts_++;\n    this.latestDts_ = event.dts;\n  };\n\n  CaptionStream$1.prototype.flushCCStreams = function (flushType) {\n    this.ccStreams_.forEach(function (cc) {\n      return flushType === 'flush' ? cc.flush() : cc.partialFlush();\n    }, this);\n  };\n\n  CaptionStream$1.prototype.flushStream = function (flushType) {\n    // make sure we actually parsed captions before proceeding\n    if (!this.captionPackets_.length) {\n      this.flushCCStreams(flushType);\n      return;\n    } // In Chrome, the Array#sort function is not stable so add a\n    // presortIndex that we can use to ensure we get a stable-sort\n\n\n    this.captionPackets_.forEach(function (elem, idx) {\n      elem.presortIndex = idx;\n    }); // sort caption byte-pairs based on their PTS values\n\n    this.captionPackets_.sort(function (a, b) {\n      if (a.pts === b.pts) {\n        return a.presortIndex - b.presortIndex;\n      }\n\n      return a.pts - b.pts;\n    });\n    this.captionPackets_.forEach(function (packet) {\n      if (packet.type < 2) {\n        // Dispatch packet to the right Cea608Stream\n        this.dispatchCea608Packet(packet);\n      } else {\n        // Dispatch packet to the Cea708Stream\n        this.dispatchCea708Packet(packet);\n      }\n    }, this);\n    this.captionPackets_.length = 0;\n    this.flushCCStreams(flushType);\n  };\n\n  CaptionStream$1.prototype.flush = function () {\n    return this.flushStream('flush');\n  }; // Only called if handling partial data\n\n\n  CaptionStream$1.prototype.partialFlush = function () {\n    return this.flushStream('partialFlush');\n  };\n\n  CaptionStream$1.prototype.reset = function () {\n    this.latestDts_ = null;\n    this.ignoreNextEqualDts_ = false;\n    this.numSameDts_ = 0;\n    this.activeCea608Channel_ = [null, null];\n    this.ccStreams_.forEach(function (ccStream) {\n      ccStream.reset();\n    });\n  }; // From the CEA-608 spec:\n\n  /*\n   * When XDS sub-packets are interleaved with other services, the end of each sub-packet shall be followed\n   * by a control pair to change to a different service. When any of the control codes from 0x10 to 0x1F is\n   * used to begin a control code pair, it indicates the return to captioning or Text data. The control code pair\n   * and subsequent data should then be processed according to the FCC rules. It may be necessary for the\n   * line 21 data encoder to automatically insert a control code pair (i.e. RCL, RU2, RU3, RU4, RDC, or RTD)\n   * to switch to captioning or Text.\n  */\n  // With that in mind, we ignore any data between an XDS control code and a\n  // subsequent closed-captioning control code.\n\n\n  CaptionStream$1.prototype.dispatchCea608Packet = function (packet) {\n    // NOTE: packet.type is the CEA608 field\n    if (this.setsTextOrXDSActive(packet)) {\n      this.activeCea608Channel_[packet.type] = null;\n    } else if (this.setsChannel1Active(packet)) {\n      this.activeCea608Channel_[packet.type] = 0;\n    } else if (this.setsChannel2Active(packet)) {\n      this.activeCea608Channel_[packet.type] = 1;\n    }\n\n    if (this.activeCea608Channel_[packet.type] === null) {\n      // If we haven't received anything to set the active channel, or the\n      // packets are Text/XDS data, discard the data; we don't want jumbled\n      // captions\n      return;\n    }\n\n    this.ccStreams_[(packet.type << 1) + this.activeCea608Channel_[packet.type]].push(packet);\n  };\n\n  CaptionStream$1.prototype.setsChannel1Active = function (packet) {\n    return (packet.ccData & 0x7800) === 0x1000;\n  };\n\n  CaptionStream$1.prototype.setsChannel2Active = function (packet) {\n    return (packet.ccData & 0x7800) === 0x1800;\n  };\n\n  CaptionStream$1.prototype.setsTextOrXDSActive = function (packet) {\n    return (packet.ccData & 0x7100) === 0x0100 || (packet.ccData & 0x78fe) === 0x102a || (packet.ccData & 0x78fe) === 0x182a;\n  };\n\n  CaptionStream$1.prototype.dispatchCea708Packet = function (packet) {\n    if (this.parse708captions_) {\n      this.cc708Stream_.push(packet);\n    }\n  }; // ----------------------\n  // Session to Application\n  // ----------------------\n  // This hash maps special and extended character codes to their\n  // proper Unicode equivalent. The first one-byte key is just a\n  // non-standard character code. The two-byte keys that follow are\n  // the extended CEA708 character codes, along with the preceding\n  // 0x10 extended character byte to distinguish these codes from\n  // non-extended character codes. Every CEA708 character code that\n  // is not in this object maps directly to a standard unicode\n  // character code.\n  // The transparent space and non-breaking transparent space are\n  // technically not fully supported since there is no code to\n  // make them transparent, so they have normal non-transparent\n  // stand-ins.\n  // The special closed caption (CC) character isn't a standard\n  // unicode character, so a fairly similar unicode character was\n  // chosen in it's place.\n\n\n  var CHARACTER_TRANSLATION_708 = {\n    0x7f: 0x266a,\n    // ♪\n    0x1020: 0x20,\n    // Transparent Space\n    0x1021: 0xa0,\n    // Nob-breaking Transparent Space\n    0x1025: 0x2026,\n    // …\n    0x102a: 0x0160,\n    // Š\n    0x102c: 0x0152,\n    // Œ\n    0x1030: 0x2588,\n    // █\n    0x1031: 0x2018,\n    // ‘\n    0x1032: 0x2019,\n    // ’\n    0x1033: 0x201c,\n    // “\n    0x1034: 0x201d,\n    // ”\n    0x1035: 0x2022,\n    // •\n    0x1039: 0x2122,\n    // ™\n    0x103a: 0x0161,\n    // š\n    0x103c: 0x0153,\n    // œ\n    0x103d: 0x2120,\n    // ℠\n    0x103f: 0x0178,\n    // Ÿ\n    0x1076: 0x215b,\n    // ⅛\n    0x1077: 0x215c,\n    // ⅜\n    0x1078: 0x215d,\n    // ⅝\n    0x1079: 0x215e,\n    // ⅞\n    0x107a: 0x23d0,\n    // ⏐\n    0x107b: 0x23a4,\n    // ⎤\n    0x107c: 0x23a3,\n    // ⎣\n    0x107d: 0x23af,\n    // ⎯\n    0x107e: 0x23a6,\n    // ⎦\n    0x107f: 0x23a1,\n    // ⎡\n    0x10a0: 0x3138 // ㄸ (CC char)\n\n  };\n\n  var get708CharFromCode = function get708CharFromCode(code) {\n    var newCode = CHARACTER_TRANSLATION_708[code] || code;\n\n    if (code & 0x1000 && code === newCode) {\n      // Invalid extended code\n      return '';\n    }\n\n    return String.fromCharCode(newCode);\n  };\n\n  var within708TextBlock = function within708TextBlock(b) {\n    return 0x20 <= b && b <= 0x7f || 0xa0 <= b && b <= 0xff;\n  };\n\n  var Cea708Window = function Cea708Window(windowNum) {\n    this.windowNum = windowNum;\n    this.reset();\n  };\n\n  Cea708Window.prototype.reset = function () {\n    this.clearText();\n    this.pendingNewLine = false;\n    this.winAttr = {};\n    this.penAttr = {};\n    this.penLoc = {};\n    this.penColor = {}; // These default values are arbitrary,\n    // defineWindow will usually override them\n\n    this.visible = 0;\n    this.rowLock = 0;\n    this.columnLock = 0;\n    this.priority = 0;\n    this.relativePositioning = 0;\n    this.anchorVertical = 0;\n    this.anchorHorizontal = 0;\n    this.anchorPoint = 0;\n    this.rowCount = 1;\n    this.virtualRowCount = this.rowCount + 1;\n    this.columnCount = 41;\n    this.windowStyle = 0;\n    this.penStyle = 0;\n  };\n\n  Cea708Window.prototype.getText = function () {\n    return this.rows.join('\\n');\n  };\n\n  Cea708Window.prototype.clearText = function () {\n    this.rows = [''];\n    this.rowIdx = 0;\n  };\n\n  Cea708Window.prototype.newLine = function (pts) {\n    if (this.rows.length >= this.virtualRowCount && typeof this.beforeRowOverflow === 'function') {\n      this.beforeRowOverflow(pts);\n    }\n\n    if (this.rows.length > 0) {\n      this.rows.push('');\n      this.rowIdx++;\n    } // Show all virtual rows since there's no visible scrolling\n\n\n    while (this.rows.length > this.virtualRowCount) {\n      this.rows.shift();\n      this.rowIdx--;\n    }\n  };\n\n  Cea708Window.prototype.isEmpty = function () {\n    if (this.rows.length === 0) {\n      return true;\n    } else if (this.rows.length === 1) {\n      return this.rows[0] === '';\n    }\n\n    return false;\n  };\n\n  Cea708Window.prototype.addText = function (text) {\n    this.rows[this.rowIdx] += text;\n  };\n\n  Cea708Window.prototype.backspace = function () {\n    if (!this.isEmpty()) {\n      var row = this.rows[this.rowIdx];\n      this.rows[this.rowIdx] = row.substr(0, row.length - 1);\n    }\n  };\n\n  var Cea708Service = function Cea708Service(serviceNum, encoding, stream) {\n    this.serviceNum = serviceNum;\n    this.text = '';\n    this.currentWindow = new Cea708Window(-1);\n    this.windows = [];\n    this.stream = stream; // Try to setup a TextDecoder if an `encoding` value was provided\n\n    if (typeof encoding === 'string') {\n      this.createTextDecoder(encoding);\n    }\n  };\n  /**\n   * Initialize service windows\n   * Must be run before service use\n   *\n   * @param  {Integer}  pts               PTS value\n   * @param  {Function} beforeRowOverflow Function to execute before row overflow of a window\n   */\n\n\n  Cea708Service.prototype.init = function (pts, beforeRowOverflow) {\n    this.startPts = pts;\n\n    for (var win = 0; win < 8; win++) {\n      this.windows[win] = new Cea708Window(win);\n\n      if (typeof beforeRowOverflow === 'function') {\n        this.windows[win].beforeRowOverflow = beforeRowOverflow;\n      }\n    }\n  };\n  /**\n   * Set current window of service to be affected by commands\n   *\n   * @param  {Integer} windowNum Window number\n   */\n\n\n  Cea708Service.prototype.setCurrentWindow = function (windowNum) {\n    this.currentWindow = this.windows[windowNum];\n  };\n  /**\n   * Try to create a TextDecoder if it is natively supported\n   */\n\n\n  Cea708Service.prototype.createTextDecoder = function (encoding) {\n    if (typeof TextDecoder === 'undefined') {\n      this.stream.trigger('log', {\n        level: 'warn',\n        message: 'The `encoding` option is unsupported without TextDecoder support'\n      });\n    } else {\n      try {\n        this.textDecoder_ = new TextDecoder(encoding);\n      } catch (error) {\n        this.stream.trigger('log', {\n          level: 'warn',\n          message: 'TextDecoder could not be created with ' + encoding + ' encoding. ' + error\n        });\n      }\n    }\n  };\n\n  var Cea708Stream = function Cea708Stream(options) {\n    options = options || {};\n    Cea708Stream.prototype.init.call(this);\n    var self = this;\n    var captionServices = options.captionServices || {};\n    var captionServiceEncodings = {};\n    var serviceProps; // Get service encodings from captionServices option block\n\n    Object.keys(captionServices).forEach(function (serviceName) {\n      serviceProps = captionServices[serviceName];\n\n      if (/^SERVICE/.test(serviceName)) {\n        captionServiceEncodings[serviceName] = serviceProps.encoding;\n      }\n    });\n    this.serviceEncodings = captionServiceEncodings;\n    this.current708Packet = null;\n    this.services = {};\n\n    this.push = function (packet) {\n      if (packet.type === 3) {\n        // 708 packet start\n        self.new708Packet();\n        self.add708Bytes(packet);\n      } else {\n        if (self.current708Packet === null) {\n          // This should only happen at the start of a file if there's no packet start.\n          self.new708Packet();\n        }\n\n        self.add708Bytes(packet);\n      }\n    };\n  };\n\n  Cea708Stream.prototype = new stream();\n  /**\n   * Push current 708 packet, create new 708 packet.\n   */\n\n  Cea708Stream.prototype.new708Packet = function () {\n    if (this.current708Packet !== null) {\n      this.push708Packet();\n    }\n\n    this.current708Packet = {\n      data: [],\n      ptsVals: []\n    };\n  };\n  /**\n   * Add pts and both bytes from packet into current 708 packet.\n   */\n\n\n  Cea708Stream.prototype.add708Bytes = function (packet) {\n    var data = packet.ccData;\n    var byte0 = data >>> 8;\n    var byte1 = data & 0xff; // I would just keep a list of packets instead of bytes, but it isn't clear in the spec\n    // that service blocks will always line up with byte pairs.\n\n    this.current708Packet.ptsVals.push(packet.pts);\n    this.current708Packet.data.push(byte0);\n    this.current708Packet.data.push(byte1);\n  };\n  /**\n   * Parse completed 708 packet into service blocks and push each service block.\n   */\n\n\n  Cea708Stream.prototype.push708Packet = function () {\n    var packet708 = this.current708Packet;\n    var packetData = packet708.data;\n    var serviceNum = null;\n    var blockSize = null;\n    var i = 0;\n    var b = packetData[i++];\n    packet708.seq = b >> 6;\n    packet708.sizeCode = b & 0x3f; // 0b00111111;\n\n    for (; i < packetData.length; i++) {\n      b = packetData[i++];\n      serviceNum = b >> 5;\n      blockSize = b & 0x1f; // 0b00011111\n\n      if (serviceNum === 7 && blockSize > 0) {\n        // Extended service num\n        b = packetData[i++];\n        serviceNum = b;\n      }\n\n      this.pushServiceBlock(serviceNum, i, blockSize);\n\n      if (blockSize > 0) {\n        i += blockSize - 1;\n      }\n    }\n  };\n  /**\n   * Parse service block, execute commands, read text.\n   *\n   * Note: While many of these commands serve important purposes,\n   * many others just parse out the parameters or attributes, but\n   * nothing is done with them because this is not a full and complete\n   * implementation of the entire 708 spec.\n   *\n   * @param  {Integer} serviceNum Service number\n   * @param  {Integer} start      Start index of the 708 packet data\n   * @param  {Integer} size       Block size\n   */\n\n\n  Cea708Stream.prototype.pushServiceBlock = function (serviceNum, start, size) {\n    var b;\n    var i = start;\n    var packetData = this.current708Packet.data;\n    var service = this.services[serviceNum];\n\n    if (!service) {\n      service = this.initService(serviceNum, i);\n    }\n\n    for (; i < start + size && i < packetData.length; i++) {\n      b = packetData[i];\n\n      if (within708TextBlock(b)) {\n        i = this.handleText(i, service);\n      } else if (b === 0x18) {\n        i = this.multiByteCharacter(i, service);\n      } else if (b === 0x10) {\n        i = this.extendedCommands(i, service);\n      } else if (0x80 <= b && b <= 0x87) {\n        i = this.setCurrentWindow(i, service);\n      } else if (0x98 <= b && b <= 0x9f) {\n        i = this.defineWindow(i, service);\n      } else if (b === 0x88) {\n        i = this.clearWindows(i, service);\n      } else if (b === 0x8c) {\n        i = this.deleteWindows(i, service);\n      } else if (b === 0x89) {\n        i = this.displayWindows(i, service);\n      } else if (b === 0x8a) {\n        i = this.hideWindows(i, service);\n      } else if (b === 0x8b) {\n        i = this.toggleWindows(i, service);\n      } else if (b === 0x97) {\n        i = this.setWindowAttributes(i, service);\n      } else if (b === 0x90) {\n        i = this.setPenAttributes(i, service);\n      } else if (b === 0x91) {\n        i = this.setPenColor(i, service);\n      } else if (b === 0x92) {\n        i = this.setPenLocation(i, service);\n      } else if (b === 0x8f) {\n        service = this.reset(i, service);\n      } else if (b === 0x08) {\n        // BS: Backspace\n        service.currentWindow.backspace();\n      } else if (b === 0x0c) {\n        // FF: Form feed\n        service.currentWindow.clearText();\n      } else if (b === 0x0d) {\n        // CR: Carriage return\n        service.currentWindow.pendingNewLine = true;\n      } else if (b === 0x0e) {\n        // HCR: Horizontal carriage return\n        service.currentWindow.clearText();\n      } else if (b === 0x8d) {\n        // DLY: Delay, nothing to do\n        i++;\n      } else ;\n    }\n  };\n  /**\n   * Execute an extended command\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.extendedCommands = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[++i];\n\n    if (within708TextBlock(b)) {\n      i = this.handleText(i, service, {\n        isExtended: true\n      });\n    }\n\n    return i;\n  };\n  /**\n   * Get PTS value of a given byte index\n   *\n   * @param  {Integer} byteIndex  Index of the byte\n   * @return {Integer}            PTS\n   */\n\n\n  Cea708Stream.prototype.getPts = function (byteIndex) {\n    // There's 1 pts value per 2 bytes\n    return this.current708Packet.ptsVals[Math.floor(byteIndex / 2)];\n  };\n  /**\n   * Initializes a service\n   *\n   * @param  {Integer} serviceNum Service number\n   * @return {Service}            Initialized service object\n   */\n\n\n  Cea708Stream.prototype.initService = function (serviceNum, i) {\n    var serviceName = 'SERVICE' + serviceNum;\n    var self = this;\n    var serviceName;\n    var encoding;\n\n    if (serviceName in this.serviceEncodings) {\n      encoding = this.serviceEncodings[serviceName];\n    }\n\n    this.services[serviceNum] = new Cea708Service(serviceNum, encoding, self);\n    this.services[serviceNum].init(this.getPts(i), function (pts) {\n      self.flushDisplayed(pts, self.services[serviceNum]);\n    });\n    return this.services[serviceNum];\n  };\n  /**\n   * Execute text writing to current window\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.handleText = function (i, service, options) {\n    var isExtended = options && options.isExtended;\n    var isMultiByte = options && options.isMultiByte;\n    var packetData = this.current708Packet.data;\n    var extended = isExtended ? 0x1000 : 0x0000;\n    var currentByte = packetData[i];\n    var nextByte = packetData[i + 1];\n    var win = service.currentWindow;\n\n    var _char;\n\n    var charCodeArray; // Use the TextDecoder if one was created for this service\n\n    if (service.textDecoder_ && !isExtended) {\n      if (isMultiByte) {\n        charCodeArray = [currentByte, nextByte];\n        i++;\n      } else {\n        charCodeArray = [currentByte];\n      }\n\n      _char = service.textDecoder_.decode(new Uint8Array(charCodeArray));\n    } else {\n      _char = get708CharFromCode(extended | currentByte);\n    }\n\n    if (win.pendingNewLine && !win.isEmpty()) {\n      win.newLine(this.getPts(i));\n    }\n\n    win.pendingNewLine = false;\n    win.addText(_char);\n    return i;\n  };\n  /**\n   * Handle decoding of multibyte character\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.multiByteCharacter = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var firstByte = packetData[i + 1];\n    var secondByte = packetData[i + 2];\n\n    if (within708TextBlock(firstByte) && within708TextBlock(secondByte)) {\n      i = this.handleText(++i, service, {\n        isMultiByte: true\n      });\n    }\n\n    return i;\n  };\n  /**\n   * Parse and execute the CW# command.\n   *\n   * Set the current window.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.setCurrentWindow = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[i];\n    var windowNum = b & 0x07;\n    service.setCurrentWindow(windowNum);\n    return i;\n  };\n  /**\n   * Parse and execute the DF# command.\n   *\n   * Define a window and set it as the current window.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.defineWindow = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[i];\n    var windowNum = b & 0x07;\n    service.setCurrentWindow(windowNum);\n    var win = service.currentWindow;\n    b = packetData[++i];\n    win.visible = (b & 0x20) >> 5; // v\n\n    win.rowLock = (b & 0x10) >> 4; // rl\n\n    win.columnLock = (b & 0x08) >> 3; // cl\n\n    win.priority = b & 0x07; // p\n\n    b = packetData[++i];\n    win.relativePositioning = (b & 0x80) >> 7; // rp\n\n    win.anchorVertical = b & 0x7f; // av\n\n    b = packetData[++i];\n    win.anchorHorizontal = b; // ah\n\n    b = packetData[++i];\n    win.anchorPoint = (b & 0xf0) >> 4; // ap\n\n    win.rowCount = b & 0x0f; // rc\n\n    b = packetData[++i];\n    win.columnCount = b & 0x3f; // cc\n\n    b = packetData[++i];\n    win.windowStyle = (b & 0x38) >> 3; // ws\n\n    win.penStyle = b & 0x07; // ps\n    // The spec says there are (rowCount+1) \"virtual rows\"\n\n    win.virtualRowCount = win.rowCount + 1;\n    return i;\n  };\n  /**\n   * Parse and execute the SWA command.\n   *\n   * Set attributes of the current window.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.setWindowAttributes = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[i];\n    var winAttr = service.currentWindow.winAttr;\n    b = packetData[++i];\n    winAttr.fillOpacity = (b & 0xc0) >> 6; // fo\n\n    winAttr.fillRed = (b & 0x30) >> 4; // fr\n\n    winAttr.fillGreen = (b & 0x0c) >> 2; // fg\n\n    winAttr.fillBlue = b & 0x03; // fb\n\n    b = packetData[++i];\n    winAttr.borderType = (b & 0xc0) >> 6; // bt\n\n    winAttr.borderRed = (b & 0x30) >> 4; // br\n\n    winAttr.borderGreen = (b & 0x0c) >> 2; // bg\n\n    winAttr.borderBlue = b & 0x03; // bb\n\n    b = packetData[++i];\n    winAttr.borderType += (b & 0x80) >> 5; // bt\n\n    winAttr.wordWrap = (b & 0x40) >> 6; // ww\n\n    winAttr.printDirection = (b & 0x30) >> 4; // pd\n\n    winAttr.scrollDirection = (b & 0x0c) >> 2; // sd\n\n    winAttr.justify = b & 0x03; // j\n\n    b = packetData[++i];\n    winAttr.effectSpeed = (b & 0xf0) >> 4; // es\n\n    winAttr.effectDirection = (b & 0x0c) >> 2; // ed\n\n    winAttr.displayEffect = b & 0x03; // de\n\n    return i;\n  };\n  /**\n   * Gather text from all displayed windows and push a caption to output.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   */\n\n\n  Cea708Stream.prototype.flushDisplayed = function (pts, service) {\n    var displayedText = []; // TODO: Positioning not supported, displaying multiple windows will not necessarily\n    // display text in the correct order, but sample files so far have not shown any issue.\n\n    for (var winId = 0; winId < 8; winId++) {\n      if (service.windows[winId].visible && !service.windows[winId].isEmpty()) {\n        displayedText.push(service.windows[winId].getText());\n      }\n    }\n\n    service.endPts = pts;\n    service.text = displayedText.join('\\n\\n');\n    this.pushCaption(service);\n    service.startPts = pts;\n  };\n  /**\n   * Push a caption to output if the caption contains text.\n   *\n   * @param  {Service} service  The service object to be affected\n   */\n\n\n  Cea708Stream.prototype.pushCaption = function (service) {\n    if (service.text !== '') {\n      this.trigger('data', {\n        startPts: service.startPts,\n        endPts: service.endPts,\n        text: service.text,\n        stream: 'cc708_' + service.serviceNum\n      });\n      service.text = '';\n      service.startPts = service.endPts;\n    }\n  };\n  /**\n   * Parse and execute the DSW command.\n   *\n   * Set visible property of windows based on the parsed bitmask.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.displayWindows = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[++i];\n    var pts = this.getPts(i);\n    this.flushDisplayed(pts, service);\n\n    for (var winId = 0; winId < 8; winId++) {\n      if (b & 0x01 << winId) {\n        service.windows[winId].visible = 1;\n      }\n    }\n\n    return i;\n  };\n  /**\n   * Parse and execute the HDW command.\n   *\n   * Set visible property of windows based on the parsed bitmask.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.hideWindows = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[++i];\n    var pts = this.getPts(i);\n    this.flushDisplayed(pts, service);\n\n    for (var winId = 0; winId < 8; winId++) {\n      if (b & 0x01 << winId) {\n        service.windows[winId].visible = 0;\n      }\n    }\n\n    return i;\n  };\n  /**\n   * Parse and execute the TGW command.\n   *\n   * Set visible property of windows based on the parsed bitmask.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.toggleWindows = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[++i];\n    var pts = this.getPts(i);\n    this.flushDisplayed(pts, service);\n\n    for (var winId = 0; winId < 8; winId++) {\n      if (b & 0x01 << winId) {\n        service.windows[winId].visible ^= 1;\n      }\n    }\n\n    return i;\n  };\n  /**\n   * Parse and execute the CLW command.\n   *\n   * Clear text of windows based on the parsed bitmask.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.clearWindows = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[++i];\n    var pts = this.getPts(i);\n    this.flushDisplayed(pts, service);\n\n    for (var winId = 0; winId < 8; winId++) {\n      if (b & 0x01 << winId) {\n        service.windows[winId].clearText();\n      }\n    }\n\n    return i;\n  };\n  /**\n   * Parse and execute the DLW command.\n   *\n   * Re-initialize windows based on the parsed bitmask.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.deleteWindows = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[++i];\n    var pts = this.getPts(i);\n    this.flushDisplayed(pts, service);\n\n    for (var winId = 0; winId < 8; winId++) {\n      if (b & 0x01 << winId) {\n        service.windows[winId].reset();\n      }\n    }\n\n    return i;\n  };\n  /**\n   * Parse and execute the SPA command.\n   *\n   * Set pen attributes of the current window.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.setPenAttributes = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[i];\n    var penAttr = service.currentWindow.penAttr;\n    b = packetData[++i];\n    penAttr.textTag = (b & 0xf0) >> 4; // tt\n\n    penAttr.offset = (b & 0x0c) >> 2; // o\n\n    penAttr.penSize = b & 0x03; // s\n\n    b = packetData[++i];\n    penAttr.italics = (b & 0x80) >> 7; // i\n\n    penAttr.underline = (b & 0x40) >> 6; // u\n\n    penAttr.edgeType = (b & 0x38) >> 3; // et\n\n    penAttr.fontStyle = b & 0x07; // fs\n\n    return i;\n  };\n  /**\n   * Parse and execute the SPC command.\n   *\n   * Set pen color of the current window.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.setPenColor = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[i];\n    var penColor = service.currentWindow.penColor;\n    b = packetData[++i];\n    penColor.fgOpacity = (b & 0xc0) >> 6; // fo\n\n    penColor.fgRed = (b & 0x30) >> 4; // fr\n\n    penColor.fgGreen = (b & 0x0c) >> 2; // fg\n\n    penColor.fgBlue = b & 0x03; // fb\n\n    b = packetData[++i];\n    penColor.bgOpacity = (b & 0xc0) >> 6; // bo\n\n    penColor.bgRed = (b & 0x30) >> 4; // br\n\n    penColor.bgGreen = (b & 0x0c) >> 2; // bg\n\n    penColor.bgBlue = b & 0x03; // bb\n\n    b = packetData[++i];\n    penColor.edgeRed = (b & 0x30) >> 4; // er\n\n    penColor.edgeGreen = (b & 0x0c) >> 2; // eg\n\n    penColor.edgeBlue = b & 0x03; // eb\n\n    return i;\n  };\n  /**\n   * Parse and execute the SPL command.\n   *\n   * Set pen location of the current window.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.setPenLocation = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[i];\n    var penLoc = service.currentWindow.penLoc; // Positioning isn't really supported at the moment, so this essentially just inserts a linebreak\n\n    service.currentWindow.pendingNewLine = true;\n    b = packetData[++i];\n    penLoc.row = b & 0x0f; // r\n\n    b = packetData[++i];\n    penLoc.column = b & 0x3f; // c\n\n    return i;\n  };\n  /**\n   * Execute the RST command.\n   *\n   * Reset service to a clean slate. Re-initialize.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Service}          Re-initialized service\n   */\n\n\n  Cea708Stream.prototype.reset = function (i, service) {\n    var pts = this.getPts(i);\n    this.flushDisplayed(pts, service);\n    return this.initService(service.serviceNum, i);\n  }; // This hash maps non-ASCII, special, and extended character codes to their\n  // proper Unicode equivalent. The first keys that are only a single byte\n  // are the non-standard ASCII characters, which simply map the CEA608 byte\n  // to the standard ASCII/Unicode. The two-byte keys that follow are the CEA608\n  // character codes, but have their MSB bitmasked with 0x03 so that a lookup\n  // can be performed regardless of the field and data channel on which the\n  // character code was received.\n\n\n  var CHARACTER_TRANSLATION = {\n    0x2a: 0xe1,\n    // á\n    0x5c: 0xe9,\n    // é\n    0x5e: 0xed,\n    // í\n    0x5f: 0xf3,\n    // ó\n    0x60: 0xfa,\n    // ú\n    0x7b: 0xe7,\n    // ç\n    0x7c: 0xf7,\n    // ÷\n    0x7d: 0xd1,\n    // Ñ\n    0x7e: 0xf1,\n    // ñ\n    0x7f: 0x2588,\n    // █\n    0x0130: 0xae,\n    // ®\n    0x0131: 0xb0,\n    // °\n    0x0132: 0xbd,\n    // ½\n    0x0133: 0xbf,\n    // ¿\n    0x0134: 0x2122,\n    // ™\n    0x0135: 0xa2,\n    // ¢\n    0x0136: 0xa3,\n    // £\n    0x0137: 0x266a,\n    // ♪\n    0x0138: 0xe0,\n    // à\n    0x0139: 0xa0,\n    //\n    0x013a: 0xe8,\n    // è\n    0x013b: 0xe2,\n    // â\n    0x013c: 0xea,\n    // ê\n    0x013d: 0xee,\n    // î\n    0x013e: 0xf4,\n    // ô\n    0x013f: 0xfb,\n    // û\n    0x0220: 0xc1,\n    // Á\n    0x0221: 0xc9,\n    // É\n    0x0222: 0xd3,\n    // Ó\n    0x0223: 0xda,\n    // Ú\n    0x0224: 0xdc,\n    // Ü\n    0x0225: 0xfc,\n    // ü\n    0x0226: 0x2018,\n    // ‘\n    0x0227: 0xa1,\n    // ¡\n    0x0228: 0x2a,\n    // *\n    0x0229: 0x27,\n    // '\n    0x022a: 0x2014,\n    // —\n    0x022b: 0xa9,\n    // ©\n    0x022c: 0x2120,\n    // ℠\n    0x022d: 0x2022,\n    // •\n    0x022e: 0x201c,\n    // “\n    0x022f: 0x201d,\n    // ”\n    0x0230: 0xc0,\n    // À\n    0x0231: 0xc2,\n    // Â\n    0x0232: 0xc7,\n    // Ç\n    0x0233: 0xc8,\n    // È\n    0x0234: 0xca,\n    // Ê\n    0x0235: 0xcb,\n    // Ë\n    0x0236: 0xeb,\n    // ë\n    0x0237: 0xce,\n    // Î\n    0x0238: 0xcf,\n    // Ï\n    0x0239: 0xef,\n    // ï\n    0x023a: 0xd4,\n    // Ô\n    0x023b: 0xd9,\n    // Ù\n    0x023c: 0xf9,\n    // ù\n    0x023d: 0xdb,\n    // Û\n    0x023e: 0xab,\n    // «\n    0x023f: 0xbb,\n    // »\n    0x0320: 0xc3,\n    // Ã\n    0x0321: 0xe3,\n    // ã\n    0x0322: 0xcd,\n    // Í\n    0x0323: 0xcc,\n    // Ì\n    0x0324: 0xec,\n    // ì\n    0x0325: 0xd2,\n    // Ò\n    0x0326: 0xf2,\n    // ò\n    0x0327: 0xd5,\n    // Õ\n    0x0328: 0xf5,\n    // õ\n    0x0329: 0x7b,\n    // {\n    0x032a: 0x7d,\n    // }\n    0x032b: 0x5c,\n    // \\\n    0x032c: 0x5e,\n    // ^\n    0x032d: 0x5f,\n    // _\n    0x032e: 0x7c,\n    // |\n    0x032f: 0x7e,\n    // ~\n    0x0330: 0xc4,\n    // Ä\n    0x0331: 0xe4,\n    // ä\n    0x0332: 0xd6,\n    // Ö\n    0x0333: 0xf6,\n    // ö\n    0x0334: 0xdf,\n    // ß\n    0x0335: 0xa5,\n    // ¥\n    0x0336: 0xa4,\n    // ¤\n    0x0337: 0x2502,\n    // │\n    0x0338: 0xc5,\n    // Å\n    0x0339: 0xe5,\n    // å\n    0x033a: 0xd8,\n    // Ø\n    0x033b: 0xf8,\n    // ø\n    0x033c: 0x250c,\n    // ┌\n    0x033d: 0x2510,\n    // ┐\n    0x033e: 0x2514,\n    // └\n    0x033f: 0x2518 // ┘\n\n  };\n\n  var getCharFromCode = function getCharFromCode(code) {\n    if (code === null) {\n      return '';\n    }\n\n    code = CHARACTER_TRANSLATION[code] || code;\n    return String.fromCharCode(code);\n  }; // the index of the last row in a CEA-608 display buffer\n\n\n  var BOTTOM_ROW = 14; // This array is used for mapping PACs -> row #, since there's no way of\n  // getting it through bit logic.\n\n  var ROWS = [0x1100, 0x1120, 0x1200, 0x1220, 0x1500, 0x1520, 0x1600, 0x1620, 0x1700, 0x1720, 0x1000, 0x1300, 0x1320, 0x1400, 0x1420]; // CEA-608 captions are rendered onto a 34x15 matrix of character\n  // cells. The \"bottom\" row is the last element in the outer array.\n\n  var createDisplayBuffer = function createDisplayBuffer() {\n    var result = [],\n        i = BOTTOM_ROW + 1;\n\n    while (i--) {\n      result.push('');\n    }\n\n    return result;\n  };\n\n  var Cea608Stream = function Cea608Stream(field, dataChannel) {\n    Cea608Stream.prototype.init.call(this);\n    this.field_ = field || 0;\n    this.dataChannel_ = dataChannel || 0;\n    this.name_ = 'CC' + ((this.field_ << 1 | this.dataChannel_) + 1);\n    this.setConstants();\n    this.reset();\n\n    this.push = function (packet) {\n      var data, swap, char0, char1, text; // remove the parity bits\n\n      data = packet.ccData & 0x7f7f; // ignore duplicate control codes; the spec demands they're sent twice\n\n      if (data === this.lastControlCode_) {\n        this.lastControlCode_ = null;\n        return;\n      } // Store control codes\n\n\n      if ((data & 0xf000) === 0x1000) {\n        this.lastControlCode_ = data;\n      } else if (data !== this.PADDING_) {\n        this.lastControlCode_ = null;\n      }\n\n      char0 = data >>> 8;\n      char1 = data & 0xff;\n\n      if (data === this.PADDING_) {\n        return;\n      } else if (data === this.RESUME_CAPTION_LOADING_) {\n        this.mode_ = 'popOn';\n      } else if (data === this.END_OF_CAPTION_) {\n        // If an EOC is received while in paint-on mode, the displayed caption\n        // text should be swapped to non-displayed memory as if it was a pop-on\n        // caption. Because of that, we should explicitly switch back to pop-on\n        // mode\n        this.mode_ = 'popOn';\n        this.clearFormatting(packet.pts); // if a caption was being displayed, it's gone now\n\n        this.flushDisplayed(packet.pts); // flip memory\n\n        swap = this.displayed_;\n        this.displayed_ = this.nonDisplayed_;\n        this.nonDisplayed_ = swap; // start measuring the time to display the caption\n\n        this.startPts_ = packet.pts;\n      } else if (data === this.ROLL_UP_2_ROWS_) {\n        this.rollUpRows_ = 2;\n        this.setRollUp(packet.pts);\n      } else if (data === this.ROLL_UP_3_ROWS_) {\n        this.rollUpRows_ = 3;\n        this.setRollUp(packet.pts);\n      } else if (data === this.ROLL_UP_4_ROWS_) {\n        this.rollUpRows_ = 4;\n        this.setRollUp(packet.pts);\n      } else if (data === this.CARRIAGE_RETURN_) {\n        this.clearFormatting(packet.pts);\n        this.flushDisplayed(packet.pts);\n        this.shiftRowsUp_();\n        this.startPts_ = packet.pts;\n      } else if (data === this.BACKSPACE_) {\n        if (this.mode_ === 'popOn') {\n          this.nonDisplayed_[this.row_] = this.nonDisplayed_[this.row_].slice(0, -1);\n        } else {\n          this.displayed_[this.row_] = this.displayed_[this.row_].slice(0, -1);\n        }\n      } else if (data === this.ERASE_DISPLAYED_MEMORY_) {\n        this.flushDisplayed(packet.pts);\n        this.displayed_ = createDisplayBuffer();\n      } else if (data === this.ERASE_NON_DISPLAYED_MEMORY_) {\n        this.nonDisplayed_ = createDisplayBuffer();\n      } else if (data === this.RESUME_DIRECT_CAPTIONING_) {\n        if (this.mode_ !== 'paintOn') {\n          // NOTE: This should be removed when proper caption positioning is\n          // implemented\n          this.flushDisplayed(packet.pts);\n          this.displayed_ = createDisplayBuffer();\n        }\n\n        this.mode_ = 'paintOn';\n        this.startPts_ = packet.pts; // Append special characters to caption text\n      } else if (this.isSpecialCharacter(char0, char1)) {\n        // Bitmask char0 so that we can apply character transformations\n        // regardless of field and data channel.\n        // Then byte-shift to the left and OR with char1 so we can pass the\n        // entire character code to `getCharFromCode`.\n        char0 = (char0 & 0x03) << 8;\n        text = getCharFromCode(char0 | char1);\n        this[this.mode_](packet.pts, text);\n        this.column_++; // Append extended characters to caption text\n      } else if (this.isExtCharacter(char0, char1)) {\n        // Extended characters always follow their \"non-extended\" equivalents.\n        // IE if a \"è\" is desired, you'll always receive \"eè\"; non-compliant\n        // decoders are supposed to drop the \"è\", while compliant decoders\n        // backspace the \"e\" and insert \"è\".\n        // Delete the previous character\n        if (this.mode_ === 'popOn') {\n          this.nonDisplayed_[this.row_] = this.nonDisplayed_[this.row_].slice(0, -1);\n        } else {\n          this.displayed_[this.row_] = this.displayed_[this.row_].slice(0, -1);\n        } // Bitmask char0 so that we can apply character transformations\n        // regardless of field and data channel.\n        // Then byte-shift to the left and OR with char1 so we can pass the\n        // entire character code to `getCharFromCode`.\n\n\n        char0 = (char0 & 0x03) << 8;\n        text = getCharFromCode(char0 | char1);\n        this[this.mode_](packet.pts, text);\n        this.column_++; // Process mid-row codes\n      } else if (this.isMidRowCode(char0, char1)) {\n        // Attributes are not additive, so clear all formatting\n        this.clearFormatting(packet.pts); // According to the standard, mid-row codes\n        // should be replaced with spaces, so add one now\n\n        this[this.mode_](packet.pts, ' ');\n        this.column_++;\n\n        if ((char1 & 0xe) === 0xe) {\n          this.addFormatting(packet.pts, ['i']);\n        }\n\n        if ((char1 & 0x1) === 0x1) {\n          this.addFormatting(packet.pts, ['u']);\n        } // Detect offset control codes and adjust cursor\n\n      } else if (this.isOffsetControlCode(char0, char1)) {\n        // Cursor position is set by indent PAC (see below) in 4-column\n        // increments, with an additional offset code of 1-3 to reach any\n        // of the 32 columns specified by CEA-608. So all we need to do\n        // here is increment the column cursor by the given offset.\n        this.column_ += char1 & 0x03; // Detect PACs (Preamble Address Codes)\n      } else if (this.isPAC(char0, char1)) {\n        // There's no logic for PAC -> row mapping, so we have to just\n        // find the row code in an array and use its index :(\n        var row = ROWS.indexOf(data & 0x1f20); // Configure the caption window if we're in roll-up mode\n\n        if (this.mode_ === 'rollUp') {\n          // This implies that the base row is incorrectly set.\n          // As per the recommendation in CEA-608(Base Row Implementation), defer to the number\n          // of roll-up rows set.\n          if (row - this.rollUpRows_ + 1 < 0) {\n            row = this.rollUpRows_ - 1;\n          }\n\n          this.setRollUp(packet.pts, row);\n        }\n\n        if (row !== this.row_) {\n          // formatting is only persistent for current row\n          this.clearFormatting(packet.pts);\n          this.row_ = row;\n        } // All PACs can apply underline, so detect and apply\n        // (All odd-numbered second bytes set underline)\n\n\n        if (char1 & 0x1 && this.formatting_.indexOf('u') === -1) {\n          this.addFormatting(packet.pts, ['u']);\n        }\n\n        if ((data & 0x10) === 0x10) {\n          // We've got an indent level code. Each successive even number\n          // increments the column cursor by 4, so we can get the desired\n          // column position by bit-shifting to the right (to get n/2)\n          // and multiplying by 4.\n          this.column_ = ((data & 0xe) >> 1) * 4;\n        }\n\n        if (this.isColorPAC(char1)) {\n          // it's a color code, though we only support white, which\n          // can be either normal or italicized. white italics can be\n          // either 0x4e or 0x6e depending on the row, so we just\n          // bitwise-and with 0xe to see if italics should be turned on\n          if ((char1 & 0xe) === 0xe) {\n            this.addFormatting(packet.pts, ['i']);\n          }\n        } // We have a normal character in char0, and possibly one in char1\n\n      } else if (this.isNormalChar(char0)) {\n        if (char1 === 0x00) {\n          char1 = null;\n        }\n\n        text = getCharFromCode(char0);\n        text += getCharFromCode(char1);\n        this[this.mode_](packet.pts, text);\n        this.column_ += text.length;\n      } // finish data processing\n\n    };\n  };\n\n  Cea608Stream.prototype = new stream(); // Trigger a cue point that captures the current state of the\n  // display buffer\n\n  Cea608Stream.prototype.flushDisplayed = function (pts) {\n    var content = this.displayed_ // remove spaces from the start and end of the string\n    .map(function (row, index) {\n      try {\n        return row.trim();\n      } catch (e) {\n        // Ordinarily, this shouldn't happen. However, caption\n        // parsing errors should not throw exceptions and\n        // break playback.\n        this.trigger('log', {\n          level: 'warn',\n          message: 'Skipping a malformed 608 caption at index ' + index + '.'\n        });\n        return '';\n      }\n    }, this) // combine all text rows to display in one cue\n    .join('\\n') // and remove blank rows from the start and end, but not the middle\n    .replace(/^\\n+|\\n+$/g, '');\n\n    if (content.length) {\n      this.trigger('data', {\n        startPts: this.startPts_,\n        endPts: pts,\n        text: content,\n        stream: this.name_\n      });\n    }\n  };\n  /**\n   * Zero out the data, used for startup and on seek\n   */\n\n\n  Cea608Stream.prototype.reset = function () {\n    this.mode_ = 'popOn'; // When in roll-up mode, the index of the last row that will\n    // actually display captions. If a caption is shifted to a row\n    // with a lower index than this, it is cleared from the display\n    // buffer\n\n    this.topRow_ = 0;\n    this.startPts_ = 0;\n    this.displayed_ = createDisplayBuffer();\n    this.nonDisplayed_ = createDisplayBuffer();\n    this.lastControlCode_ = null; // Track row and column for proper line-breaking and spacing\n\n    this.column_ = 0;\n    this.row_ = BOTTOM_ROW;\n    this.rollUpRows_ = 2; // This variable holds currently-applied formatting\n\n    this.formatting_ = [];\n  };\n  /**\n   * Sets up control code and related constants for this instance\n   */\n\n\n  Cea608Stream.prototype.setConstants = function () {\n    // The following attributes have these uses:\n    // ext_ :    char0 for mid-row codes, and the base for extended\n    //           chars (ext_+0, ext_+1, and ext_+2 are char0s for\n    //           extended codes)\n    // control_: char0 for control codes, except byte-shifted to the\n    //           left so that we can do this.control_ | CONTROL_CODE\n    // offset_:  char0 for tab offset codes\n    //\n    // It's also worth noting that control codes, and _only_ control codes,\n    // differ between field 1 and field2. Field 2 control codes are always\n    // their field 1 value plus 1. That's why there's the \"| field\" on the\n    // control value.\n    if (this.dataChannel_ === 0) {\n      this.BASE_ = 0x10;\n      this.EXT_ = 0x11;\n      this.CONTROL_ = (0x14 | this.field_) << 8;\n      this.OFFSET_ = 0x17;\n    } else if (this.dataChannel_ === 1) {\n      this.BASE_ = 0x18;\n      this.EXT_ = 0x19;\n      this.CONTROL_ = (0x1c | this.field_) << 8;\n      this.OFFSET_ = 0x1f;\n    } // Constants for the LSByte command codes recognized by Cea608Stream. This\n    // list is not exhaustive. For a more comprehensive listing and semantics see\n    // http://www.gpo.gov/fdsys/pkg/CFR-2010-title47-vol1/pdf/CFR-2010-title47-vol1-sec15-119.pdf\n    // Padding\n\n\n    this.PADDING_ = 0x0000; // Pop-on Mode\n\n    this.RESUME_CAPTION_LOADING_ = this.CONTROL_ | 0x20;\n    this.END_OF_CAPTION_ = this.CONTROL_ | 0x2f; // Roll-up Mode\n\n    this.ROLL_UP_2_ROWS_ = this.CONTROL_ | 0x25;\n    this.ROLL_UP_3_ROWS_ = this.CONTROL_ | 0x26;\n    this.ROLL_UP_4_ROWS_ = this.CONTROL_ | 0x27;\n    this.CARRIAGE_RETURN_ = this.CONTROL_ | 0x2d; // paint-on mode\n\n    this.RESUME_DIRECT_CAPTIONING_ = this.CONTROL_ | 0x29; // Erasure\n\n    this.BACKSPACE_ = this.CONTROL_ | 0x21;\n    this.ERASE_DISPLAYED_MEMORY_ = this.CONTROL_ | 0x2c;\n    this.ERASE_NON_DISPLAYED_MEMORY_ = this.CONTROL_ | 0x2e;\n  };\n  /**\n   * Detects if the 2-byte packet data is a special character\n   *\n   * Special characters have a second byte in the range 0x30 to 0x3f,\n   * with the first byte being 0x11 (for data channel 1) or 0x19 (for\n   * data channel 2).\n   *\n   * @param  {Integer} char0 The first byte\n   * @param  {Integer} char1 The second byte\n   * @return {Boolean}       Whether the 2 bytes are an special character\n   */\n\n\n  Cea608Stream.prototype.isSpecialCharacter = function (char0, char1) {\n    return char0 === this.EXT_ && char1 >= 0x30 && char1 <= 0x3f;\n  };\n  /**\n   * Detects if the 2-byte packet data is an extended character\n   *\n   * Extended characters have a second byte in the range 0x20 to 0x3f,\n   * with the first byte being 0x12 or 0x13 (for data channel 1) or\n   * 0x1a or 0x1b (for data channel 2).\n   *\n   * @param  {Integer} char0 The first byte\n   * @param  {Integer} char1 The second byte\n   * @return {Boolean}       Whether the 2 bytes are an extended character\n   */\n\n\n  Cea608Stream.prototype.isExtCharacter = function (char0, char1) {\n    return (char0 === this.EXT_ + 1 || char0 === this.EXT_ + 2) && char1 >= 0x20 && char1 <= 0x3f;\n  };\n  /**\n   * Detects if the 2-byte packet is a mid-row code\n   *\n   * Mid-row codes have a second byte in the range 0x20 to 0x2f, with\n   * the first byte being 0x11 (for data channel 1) or 0x19 (for data\n   * channel 2).\n   *\n   * @param  {Integer} char0 The first byte\n   * @param  {Integer} char1 The second byte\n   * @return {Boolean}       Whether the 2 bytes are a mid-row code\n   */\n\n\n  Cea608Stream.prototype.isMidRowCode = function (char0, char1) {\n    return char0 === this.EXT_ && char1 >= 0x20 && char1 <= 0x2f;\n  };\n  /**\n   * Detects if the 2-byte packet is an offset control code\n   *\n   * Offset control codes have a second byte in the range 0x21 to 0x23,\n   * with the first byte being 0x17 (for data channel 1) or 0x1f (for\n   * data channel 2).\n   *\n   * @param  {Integer} char0 The first byte\n   * @param  {Integer} char1 The second byte\n   * @return {Boolean}       Whether the 2 bytes are an offset control code\n   */\n\n\n  Cea608Stream.prototype.isOffsetControlCode = function (char0, char1) {\n    return char0 === this.OFFSET_ && char1 >= 0x21 && char1 <= 0x23;\n  };\n  /**\n   * Detects if the 2-byte packet is a Preamble Address Code\n   *\n   * PACs have a first byte in the range 0x10 to 0x17 (for data channel 1)\n   * or 0x18 to 0x1f (for data channel 2), with the second byte in the\n   * range 0x40 to 0x7f.\n   *\n   * @param  {Integer} char0 The first byte\n   * @param  {Integer} char1 The second byte\n   * @return {Boolean}       Whether the 2 bytes are a PAC\n   */\n\n\n  Cea608Stream.prototype.isPAC = function (char0, char1) {\n    return char0 >= this.BASE_ && char0 < this.BASE_ + 8 && char1 >= 0x40 && char1 <= 0x7f;\n  };\n  /**\n   * Detects if a packet's second byte is in the range of a PAC color code\n   *\n   * PAC color codes have the second byte be in the range 0x40 to 0x4f, or\n   * 0x60 to 0x6f.\n   *\n   * @param  {Integer} char1 The second byte\n   * @return {Boolean}       Whether the byte is a color PAC\n   */\n\n\n  Cea608Stream.prototype.isColorPAC = function (char1) {\n    return char1 >= 0x40 && char1 <= 0x4f || char1 >= 0x60 && char1 <= 0x7f;\n  };\n  /**\n   * Detects if a single byte is in the range of a normal character\n   *\n   * Normal text bytes are in the range 0x20 to 0x7f.\n   *\n   * @param  {Integer} char  The byte\n   * @return {Boolean}       Whether the byte is a normal character\n   */\n\n\n  Cea608Stream.prototype.isNormalChar = function (_char2) {\n    return _char2 >= 0x20 && _char2 <= 0x7f;\n  };\n  /**\n   * Configures roll-up\n   *\n   * @param  {Integer} pts         Current PTS\n   * @param  {Integer} newBaseRow  Used by PACs to slide the current window to\n   *                               a new position\n   */\n\n\n  Cea608Stream.prototype.setRollUp = function (pts, newBaseRow) {\n    // Reset the base row to the bottom row when switching modes\n    if (this.mode_ !== 'rollUp') {\n      this.row_ = BOTTOM_ROW;\n      this.mode_ = 'rollUp'; // Spec says to wipe memories when switching to roll-up\n\n      this.flushDisplayed(pts);\n      this.nonDisplayed_ = createDisplayBuffer();\n      this.displayed_ = createDisplayBuffer();\n    }\n\n    if (newBaseRow !== undefined && newBaseRow !== this.row_) {\n      // move currently displayed captions (up or down) to the new base row\n      for (var i = 0; i < this.rollUpRows_; i++) {\n        this.displayed_[newBaseRow - i] = this.displayed_[this.row_ - i];\n        this.displayed_[this.row_ - i] = '';\n      }\n    }\n\n    if (newBaseRow === undefined) {\n      newBaseRow = this.row_;\n    }\n\n    this.topRow_ = newBaseRow - this.rollUpRows_ + 1;\n  }; // Adds the opening HTML tag for the passed character to the caption text,\n  // and keeps track of it for later closing\n\n\n  Cea608Stream.prototype.addFormatting = function (pts, format) {\n    this.formatting_ = this.formatting_.concat(format);\n    var text = format.reduce(function (text, format) {\n      return text + '<' + format + '>';\n    }, '');\n    this[this.mode_](pts, text);\n  }; // Adds HTML closing tags for current formatting to caption text and\n  // clears remembered formatting\n\n\n  Cea608Stream.prototype.clearFormatting = function (pts) {\n    if (!this.formatting_.length) {\n      return;\n    }\n\n    var text = this.formatting_.reverse().reduce(function (text, format) {\n      return text + '</' + format + '>';\n    }, '');\n    this.formatting_ = [];\n    this[this.mode_](pts, text);\n  }; // Mode Implementations\n\n\n  Cea608Stream.prototype.popOn = function (pts, text) {\n    var baseRow = this.nonDisplayed_[this.row_]; // buffer characters\n\n    baseRow += text;\n    this.nonDisplayed_[this.row_] = baseRow;\n  };\n\n  Cea608Stream.prototype.rollUp = function (pts, text) {\n    var baseRow = this.displayed_[this.row_];\n    baseRow += text;\n    this.displayed_[this.row_] = baseRow;\n  };\n\n  Cea608Stream.prototype.shiftRowsUp_ = function () {\n    var i; // clear out inactive rows\n\n    for (i = 0; i < this.topRow_; i++) {\n      this.displayed_[i] = '';\n    }\n\n    for (i = this.row_ + 1; i < BOTTOM_ROW + 1; i++) {\n      this.displayed_[i] = '';\n    } // shift displayed rows up\n\n\n    for (i = this.topRow_; i < this.row_; i++) {\n      this.displayed_[i] = this.displayed_[i + 1];\n    } // clear out the bottom row\n\n\n    this.displayed_[this.row_] = '';\n  };\n\n  Cea608Stream.prototype.paintOn = function (pts, text) {\n    var baseRow = this.displayed_[this.row_];\n    baseRow += text;\n    this.displayed_[this.row_] = baseRow;\n  }; // exports\n\n\n  var captionStream = {\n    CaptionStream: CaptionStream$1,\n    Cea608Stream: Cea608Stream,\n    Cea708Stream: Cea708Stream\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   */\n\n  var streamTypes = {\n    H264_STREAM_TYPE: 0x1B,\n    ADTS_STREAM_TYPE: 0x0F,\n    METADATA_STREAM_TYPE: 0x15\n  };\n  var MAX_TS = 8589934592;\n  var RO_THRESH = 4294967296;\n  var TYPE_SHARED = 'shared';\n\n  var handleRollover$1 = function handleRollover(value, reference) {\n    var direction = 1;\n\n    if (value > reference) {\n      // If the current timestamp value is greater than our reference timestamp and we detect a\n      // timestamp rollover, this means the roll over is happening in the opposite direction.\n      // Example scenario: Enter a long stream/video just after a rollover occurred. The reference\n      // point will be set to a small number, e.g. 1. The user then seeks backwards over the\n      // rollover point. In loading this segment, the timestamp values will be very large,\n      // e.g. 2^33 - 1. Since this comes before the data we loaded previously, we want to adjust\n      // the time stamp to be `value - 2^33`.\n      direction = -1;\n    } // Note: A seek forwards or back that is greater than the RO_THRESH (2^32, ~13 hours) will\n    // cause an incorrect adjustment.\n\n\n    while (Math.abs(reference - value) > RO_THRESH) {\n      value += direction * MAX_TS;\n    }\n\n    return value;\n  };\n\n  var TimestampRolloverStream$1 = function TimestampRolloverStream(type) {\n    var lastDTS, referenceDTS;\n    TimestampRolloverStream.prototype.init.call(this); // The \"shared\" type is used in cases where a stream will contain muxed\n    // video and audio. We could use `undefined` here, but having a string\n    // makes debugging a little clearer.\n\n    this.type_ = type || TYPE_SHARED;\n\n    this.push = function (data) {\n      // Any \"shared\" rollover streams will accept _all_ data. Otherwise,\n      // streams will only accept data that matches their type.\n      if (this.type_ !== TYPE_SHARED && data.type !== this.type_) {\n        return;\n      }\n\n      if (referenceDTS === undefined) {\n        referenceDTS = data.dts;\n      }\n\n      data.dts = handleRollover$1(data.dts, referenceDTS);\n      data.pts = handleRollover$1(data.pts, referenceDTS);\n      lastDTS = data.dts;\n      this.trigger('data', data);\n    };\n\n    this.flush = function () {\n      referenceDTS = lastDTS;\n      this.trigger('done');\n    };\n\n    this.endTimeline = function () {\n      this.flush();\n      this.trigger('endedtimeline');\n    };\n\n    this.discontinuity = function () {\n      referenceDTS = void 0;\n      lastDTS = void 0;\n    };\n\n    this.reset = function () {\n      this.discontinuity();\n      this.trigger('reset');\n    };\n  };\n\n  TimestampRolloverStream$1.prototype = new stream();\n  var timestampRolloverStream = {\n    TimestampRolloverStream: TimestampRolloverStream$1,\n    handleRollover: handleRollover$1\n  };\n\n  var percentEncode$1 = function percentEncode(bytes, start, end) {\n    var i,\n        result = '';\n\n    for (i = start; i < end; i++) {\n      result += '%' + ('00' + bytes[i].toString(16)).slice(-2);\n    }\n\n    return result;\n  },\n      // return the string representation of the specified byte range,\n  // interpreted as UTf-8.\n  parseUtf8 = function parseUtf8(bytes, start, end) {\n    return decodeURIComponent(percentEncode$1(bytes, start, end));\n  },\n      // return the string representation of the specified byte range,\n  // interpreted as ISO-8859-1.\n  parseIso88591$1 = function parseIso88591(bytes, start, end) {\n    return unescape(percentEncode$1(bytes, start, end)); // jshint ignore:line\n  },\n      parseSyncSafeInteger$1 = function parseSyncSafeInteger(data) {\n    return data[0] << 21 | data[1] << 14 | data[2] << 7 | data[3];\n  },\n      tagParsers = {\n    TXXX: function TXXX(tag) {\n      var i;\n\n      if (tag.data[0] !== 3) {\n        // ignore frames with unrecognized character encodings\n        return;\n      }\n\n      for (i = 1; i < tag.data.length; i++) {\n        if (tag.data[i] === 0) {\n          // parse the text fields\n          tag.description = parseUtf8(tag.data, 1, i); // do not include the null terminator in the tag value\n\n          tag.value = parseUtf8(tag.data, i + 1, tag.data.length).replace(/\\0*$/, '');\n          break;\n        }\n      }\n\n      tag.data = tag.value;\n    },\n    WXXX: function WXXX(tag) {\n      var i;\n\n      if (tag.data[0] !== 3) {\n        // ignore frames with unrecognized character encodings\n        return;\n      }\n\n      for (i = 1; i < tag.data.length; i++) {\n        if (tag.data[i] === 0) {\n          // parse the description and URL fields\n          tag.description = parseUtf8(tag.data, 1, i);\n          tag.url = parseUtf8(tag.data, i + 1, tag.data.length);\n          break;\n        }\n      }\n    },\n    PRIV: function PRIV(tag) {\n      var i;\n\n      for (i = 0; i < tag.data.length; i++) {\n        if (tag.data[i] === 0) {\n          // parse the description and URL fields\n          tag.owner = parseIso88591$1(tag.data, 0, i);\n          break;\n        }\n      }\n\n      tag.privateData = tag.data.subarray(i + 1);\n      tag.data = tag.privateData;\n    }\n  },\n      _MetadataStream;\n\n  _MetadataStream = function MetadataStream(options) {\n    var settings = {\n      // the bytes of the program-level descriptor field in MP2T\n      // see ISO/IEC 13818-1:2013 (E), section 2.6 \"Program and\n      // program element descriptors\"\n      descriptor: options && options.descriptor\n    },\n        // the total size in bytes of the ID3 tag being parsed\n    tagSize = 0,\n        // tag data that is not complete enough to be parsed\n    buffer = [],\n        // the total number of bytes currently in the buffer\n    bufferSize = 0,\n        i;\n\n    _MetadataStream.prototype.init.call(this); // calculate the text track in-band metadata track dispatch type\n    // https://html.spec.whatwg.org/multipage/embedded-content.html#steps-to-expose-a-media-resource-specific-text-track\n\n\n    this.dispatchType = streamTypes.METADATA_STREAM_TYPE.toString(16);\n\n    if (settings.descriptor) {\n      for (i = 0; i < settings.descriptor.length; i++) {\n        this.dispatchType += ('00' + settings.descriptor[i].toString(16)).slice(-2);\n      }\n    }\n\n    this.push = function (chunk) {\n      var tag, frameStart, frameSize, frame, i, frameHeader;\n\n      if (chunk.type !== 'timed-metadata') {\n        return;\n      } // if data_alignment_indicator is set in the PES header,\n      // we must have the start of a new ID3 tag. Assume anything\n      // remaining in the buffer was malformed and throw it out\n\n\n      if (chunk.dataAlignmentIndicator) {\n        bufferSize = 0;\n        buffer.length = 0;\n      } // ignore events that don't look like ID3 data\n\n\n      if (buffer.length === 0 && (chunk.data.length < 10 || chunk.data[0] !== 'I'.charCodeAt(0) || chunk.data[1] !== 'D'.charCodeAt(0) || chunk.data[2] !== '3'.charCodeAt(0))) {\n        this.trigger('log', {\n          level: 'warn',\n          message: 'Skipping unrecognized metadata packet'\n        });\n        return;\n      } // add this chunk to the data we've collected so far\n\n\n      buffer.push(chunk);\n      bufferSize += chunk.data.byteLength; // grab the size of the entire frame from the ID3 header\n\n      if (buffer.length === 1) {\n        // the frame size is transmitted as a 28-bit integer in the\n        // last four bytes of the ID3 header.\n        // The most significant bit of each byte is dropped and the\n        // results concatenated to recover the actual value.\n        tagSize = parseSyncSafeInteger$1(chunk.data.subarray(6, 10)); // ID3 reports the tag size excluding the header but it's more\n        // convenient for our comparisons to include it\n\n        tagSize += 10;\n      } // if the entire frame has not arrived, wait for more data\n\n\n      if (bufferSize < tagSize) {\n        return;\n      } // collect the entire frame so it can be parsed\n\n\n      tag = {\n        data: new Uint8Array(tagSize),\n        frames: [],\n        pts: buffer[0].pts,\n        dts: buffer[0].dts\n      };\n\n      for (i = 0; i < tagSize;) {\n        tag.data.set(buffer[0].data.subarray(0, tagSize - i), i);\n        i += buffer[0].data.byteLength;\n        bufferSize -= buffer[0].data.byteLength;\n        buffer.shift();\n      } // find the start of the first frame and the end of the tag\n\n\n      frameStart = 10;\n\n      if (tag.data[5] & 0x40) {\n        // advance the frame start past the extended header\n        frameStart += 4; // header size field\n\n        frameStart += parseSyncSafeInteger$1(tag.data.subarray(10, 14)); // clip any padding off the end\n\n        tagSize -= parseSyncSafeInteger$1(tag.data.subarray(16, 20));\n      } // parse one or more ID3 frames\n      // http://id3.org/id3v2.3.0#ID3v2_frame_overview\n\n\n      do {\n        // determine the number of bytes in this frame\n        frameSize = parseSyncSafeInteger$1(tag.data.subarray(frameStart + 4, frameStart + 8));\n\n        if (frameSize < 1) {\n          this.trigger('log', {\n            level: 'warn',\n            message: 'Malformed ID3 frame encountered. Skipping metadata parsing.'\n          });\n          return;\n        }\n\n        frameHeader = String.fromCharCode(tag.data[frameStart], tag.data[frameStart + 1], tag.data[frameStart + 2], tag.data[frameStart + 3]);\n        frame = {\n          id: frameHeader,\n          data: tag.data.subarray(frameStart + 10, frameStart + frameSize + 10)\n        };\n        frame.key = frame.id;\n\n        if (tagParsers[frame.id]) {\n          tagParsers[frame.id](frame); // handle the special PRIV frame used to indicate the start\n          // time for raw AAC data\n\n          if (frame.owner === 'com.apple.streaming.transportStreamTimestamp') {\n            var d = frame.data,\n                size = (d[3] & 0x01) << 30 | d[4] << 22 | d[5] << 14 | d[6] << 6 | d[7] >>> 2;\n            size *= 4;\n            size += d[7] & 0x03;\n            frame.timeStamp = size; // in raw AAC, all subsequent data will be timestamped based\n            // on the value of this frame\n            // we couldn't have known the appropriate pts and dts before\n            // parsing this ID3 tag so set those values now\n\n            if (tag.pts === undefined && tag.dts === undefined) {\n              tag.pts = frame.timeStamp;\n              tag.dts = frame.timeStamp;\n            }\n\n            this.trigger('timestamp', frame);\n          }\n        }\n\n        tag.frames.push(frame);\n        frameStart += 10; // advance past the frame header\n\n        frameStart += frameSize; // advance past the frame body\n      } while (frameStart < tagSize);\n\n      this.trigger('data', tag);\n    };\n  };\n\n  _MetadataStream.prototype = new stream();\n  var metadataStream = _MetadataStream;\n  var TimestampRolloverStream = timestampRolloverStream.TimestampRolloverStream; // object types\n\n  var _TransportPacketStream, _TransportParseStream, _ElementaryStream; // constants\n\n\n  var MP2T_PACKET_LENGTH$1 = 188,\n      // bytes\n  SYNC_BYTE$1 = 0x47;\n  /**\n   * Splits an incoming stream of binary data into MPEG-2 Transport\n   * Stream packets.\n   */\n\n  _TransportPacketStream = function TransportPacketStream() {\n    var buffer = new Uint8Array(MP2T_PACKET_LENGTH$1),\n        bytesInBuffer = 0;\n\n    _TransportPacketStream.prototype.init.call(this); // Deliver new bytes to the stream.\n\n    /**\n     * Split a stream of data into M2TS packets\n    **/\n\n\n    this.push = function (bytes) {\n      var startIndex = 0,\n          endIndex = MP2T_PACKET_LENGTH$1,\n          everything; // If there are bytes remaining from the last segment, prepend them to the\n      // bytes that were pushed in\n\n      if (bytesInBuffer) {\n        everything = new Uint8Array(bytes.byteLength + bytesInBuffer);\n        everything.set(buffer.subarray(0, bytesInBuffer));\n        everything.set(bytes, bytesInBuffer);\n        bytesInBuffer = 0;\n      } else {\n        everything = bytes;\n      } // While we have enough data for a packet\n\n\n      while (endIndex < everything.byteLength) {\n        // Look for a pair of start and end sync bytes in the data..\n        if (everything[startIndex] === SYNC_BYTE$1 && everything[endIndex] === SYNC_BYTE$1) {\n          // We found a packet so emit it and jump one whole packet forward in\n          // the stream\n          this.trigger('data', everything.subarray(startIndex, endIndex));\n          startIndex += MP2T_PACKET_LENGTH$1;\n          endIndex += MP2T_PACKET_LENGTH$1;\n          continue;\n        } // If we get here, we have somehow become de-synchronized and we need to step\n        // forward one byte at a time until we find a pair of sync bytes that denote\n        // a packet\n\n\n        startIndex++;\n        endIndex++;\n      } // If there was some data left over at the end of the segment that couldn't\n      // possibly be a whole packet, keep it because it might be the start of a packet\n      // that continues in the next segment\n\n\n      if (startIndex < everything.byteLength) {\n        buffer.set(everything.subarray(startIndex), 0);\n        bytesInBuffer = everything.byteLength - startIndex;\n      }\n    };\n    /**\n     * Passes identified M2TS packets to the TransportParseStream to be parsed\n    **/\n\n\n    this.flush = function () {\n      // If the buffer contains a whole packet when we are being flushed, emit it\n      // and empty the buffer. Otherwise hold onto the data because it may be\n      // important for decoding the next segment\n      if (bytesInBuffer === MP2T_PACKET_LENGTH$1 && buffer[0] === SYNC_BYTE$1) {\n        this.trigger('data', buffer);\n        bytesInBuffer = 0;\n      }\n\n      this.trigger('done');\n    };\n\n    this.endTimeline = function () {\n      this.flush();\n      this.trigger('endedtimeline');\n    };\n\n    this.reset = function () {\n      bytesInBuffer = 0;\n      this.trigger('reset');\n    };\n  };\n\n  _TransportPacketStream.prototype = new stream();\n  /**\n   * Accepts an MP2T TransportPacketStream and emits data events with parsed\n   * forms of the individual transport stream packets.\n   */\n\n  _TransportParseStream = function TransportParseStream() {\n    var parsePsi, parsePat, parsePmt, self;\n\n    _TransportParseStream.prototype.init.call(this);\n\n    self = this;\n    this.packetsWaitingForPmt = [];\n    this.programMapTable = undefined;\n\n    parsePsi = function parsePsi(payload, psi) {\n      var offset = 0; // PSI packets may be split into multiple sections and those\n      // sections may be split into multiple packets. If a PSI\n      // section starts in this packet, the payload_unit_start_indicator\n      // will be true and the first byte of the payload will indicate\n      // the offset from the current position to the start of the\n      // section.\n\n      if (psi.payloadUnitStartIndicator) {\n        offset += payload[offset] + 1;\n      }\n\n      if (psi.type === 'pat') {\n        parsePat(payload.subarray(offset), psi);\n      } else {\n        parsePmt(payload.subarray(offset), psi);\n      }\n    };\n\n    parsePat = function parsePat(payload, pat) {\n      pat.section_number = payload[7]; // eslint-disable-line camelcase\n\n      pat.last_section_number = payload[8]; // eslint-disable-line camelcase\n      // skip the PSI header and parse the first PMT entry\n\n      self.pmtPid = (payload[10] & 0x1F) << 8 | payload[11];\n      pat.pmtPid = self.pmtPid;\n    };\n    /**\n     * Parse out the relevant fields of a Program Map Table (PMT).\n     * @param payload {Uint8Array} the PMT-specific portion of an MP2T\n     * packet. The first byte in this array should be the table_id\n     * field.\n     * @param pmt {object} the object that should be decorated with\n     * fields parsed from the PMT.\n     */\n\n\n    parsePmt = function parsePmt(payload, pmt) {\n      var sectionLength, tableEnd, programInfoLength, offset; // PMTs can be sent ahead of the time when they should actually\n      // take effect. We don't believe this should ever be the case\n      // for HLS but we'll ignore \"forward\" PMT declarations if we see\n      // them. Future PMT declarations have the current_next_indicator\n      // set to zero.\n\n      if (!(payload[5] & 0x01)) {\n        return;\n      } // overwrite any existing program map table\n\n\n      self.programMapTable = {\n        video: null,\n        audio: null,\n        'timed-metadata': {}\n      }; // the mapping table ends at the end of the current section\n\n      sectionLength = (payload[1] & 0x0f) << 8 | payload[2];\n      tableEnd = 3 + sectionLength - 4; // to determine where the table is, we have to figure out how\n      // long the program info descriptors are\n\n      programInfoLength = (payload[10] & 0x0f) << 8 | payload[11]; // advance the offset to the first entry in the mapping table\n\n      offset = 12 + programInfoLength;\n\n      while (offset < tableEnd) {\n        var streamType = payload[offset];\n        var pid = (payload[offset + 1] & 0x1F) << 8 | payload[offset + 2]; // only map a single elementary_pid for audio and video stream types\n        // TODO: should this be done for metadata too? for now maintain behavior of\n        //       multiple metadata streams\n\n        if (streamType === streamTypes.H264_STREAM_TYPE && self.programMapTable.video === null) {\n          self.programMapTable.video = pid;\n        } else if (streamType === streamTypes.ADTS_STREAM_TYPE && self.programMapTable.audio === null) {\n          self.programMapTable.audio = pid;\n        } else if (streamType === streamTypes.METADATA_STREAM_TYPE) {\n          // map pid to stream type for metadata streams\n          self.programMapTable['timed-metadata'][pid] = streamType;\n        } // move to the next table entry\n        // skip past the elementary stream descriptors, if present\n\n\n        offset += ((payload[offset + 3] & 0x0F) << 8 | payload[offset + 4]) + 5;\n      } // record the map on the packet as well\n\n\n      pmt.programMapTable = self.programMapTable;\n    };\n    /**\n     * Deliver a new MP2T packet to the next stream in the pipeline.\n     */\n\n\n    this.push = function (packet) {\n      var result = {},\n          offset = 4;\n      result.payloadUnitStartIndicator = !!(packet[1] & 0x40); // pid is a 13-bit field starting at the last bit of packet[1]\n\n      result.pid = packet[1] & 0x1f;\n      result.pid <<= 8;\n      result.pid |= packet[2]; // if an adaption field is present, its length is specified by the\n      // fifth byte of the TS packet header. The adaptation field is\n      // used to add stuffing to PES packets that don't fill a complete\n      // TS packet, and to specify some forms of timing and control data\n      // that we do not currently use.\n\n      if ((packet[3] & 0x30) >>> 4 > 0x01) {\n        offset += packet[offset] + 1;\n      } // parse the rest of the packet based on the type\n\n\n      if (result.pid === 0) {\n        result.type = 'pat';\n        parsePsi(packet.subarray(offset), result);\n        this.trigger('data', result);\n      } else if (result.pid === this.pmtPid) {\n        result.type = 'pmt';\n        parsePsi(packet.subarray(offset), result);\n        this.trigger('data', result); // if there are any packets waiting for a PMT to be found, process them now\n\n        while (this.packetsWaitingForPmt.length) {\n          this.processPes_.apply(this, this.packetsWaitingForPmt.shift());\n        }\n      } else if (this.programMapTable === undefined) {\n        // When we have not seen a PMT yet, defer further processing of\n        // PES packets until one has been parsed\n        this.packetsWaitingForPmt.push([packet, offset, result]);\n      } else {\n        this.processPes_(packet, offset, result);\n      }\n    };\n\n    this.processPes_ = function (packet, offset, result) {\n      // set the appropriate stream type\n      if (result.pid === this.programMapTable.video) {\n        result.streamType = streamTypes.H264_STREAM_TYPE;\n      } else if (result.pid === this.programMapTable.audio) {\n        result.streamType = streamTypes.ADTS_STREAM_TYPE;\n      } else {\n        // if not video or audio, it is timed-metadata or unknown\n        // if unknown, streamType will be undefined\n        result.streamType = this.programMapTable['timed-metadata'][result.pid];\n      }\n\n      result.type = 'pes';\n      result.data = packet.subarray(offset);\n      this.trigger('data', result);\n    };\n  };\n\n  _TransportParseStream.prototype = new stream();\n  _TransportParseStream.STREAM_TYPES = {\n    h264: 0x1b,\n    adts: 0x0f\n  };\n  /**\n   * Reconsistutes program elementary stream (PES) packets from parsed\n   * transport stream packets. That is, if you pipe an\n   * mp2t.TransportParseStream into a mp2t.ElementaryStream, the output\n   * events will be events which capture the bytes for individual PES\n   * packets plus relevant metadata that has been extracted from the\n   * container.\n   */\n\n  _ElementaryStream = function ElementaryStream() {\n    var self = this,\n        segmentHadPmt = false,\n        // PES packet fragments\n    video = {\n      data: [],\n      size: 0\n    },\n        audio = {\n      data: [],\n      size: 0\n    },\n        timedMetadata = {\n      data: [],\n      size: 0\n    },\n        programMapTable,\n        parsePes = function parsePes(payload, pes) {\n      var ptsDtsFlags;\n      var startPrefix = payload[0] << 16 | payload[1] << 8 | payload[2]; // default to an empty array\n\n      pes.data = new Uint8Array(); // In certain live streams, the start of a TS fragment has ts packets\n      // that are frame data that is continuing from the previous fragment. This\n      // is to check that the pes data is the start of a new pes payload\n\n      if (startPrefix !== 1) {\n        return;\n      } // get the packet length, this will be 0 for video\n\n\n      pes.packetLength = 6 + (payload[4] << 8 | payload[5]); // find out if this packets starts a new keyframe\n\n      pes.dataAlignmentIndicator = (payload[6] & 0x04) !== 0; // PES packets may be annotated with a PTS value, or a PTS value\n      // and a DTS value. Determine what combination of values is\n      // available to work with.\n\n      ptsDtsFlags = payload[7]; // PTS and DTS are normally stored as a 33-bit number.  Javascript\n      // performs all bitwise operations on 32-bit integers but javascript\n      // supports a much greater range (52-bits) of integer using standard\n      // mathematical operations.\n      // We construct a 31-bit value using bitwise operators over the 31\n      // most significant bits and then multiply by 4 (equal to a left-shift\n      // of 2) before we add the final 2 least significant bits of the\n      // timestamp (equal to an OR.)\n\n      if (ptsDtsFlags & 0xC0) {\n        // the PTS and DTS are not written out directly. For information\n        // on how they are encoded, see\n        // http://dvd.sourceforge.net/dvdinfo/pes-hdr.html\n        pes.pts = (payload[9] & 0x0E) << 27 | (payload[10] & 0xFF) << 20 | (payload[11] & 0xFE) << 12 | (payload[12] & 0xFF) << 5 | (payload[13] & 0xFE) >>> 3;\n        pes.pts *= 4; // Left shift by 2\n\n        pes.pts += (payload[13] & 0x06) >>> 1; // OR by the two LSBs\n\n        pes.dts = pes.pts;\n\n        if (ptsDtsFlags & 0x40) {\n          pes.dts = (payload[14] & 0x0E) << 27 | (payload[15] & 0xFF) << 20 | (payload[16] & 0xFE) << 12 | (payload[17] & 0xFF) << 5 | (payload[18] & 0xFE) >>> 3;\n          pes.dts *= 4; // Left shift by 2\n\n          pes.dts += (payload[18] & 0x06) >>> 1; // OR by the two LSBs\n        }\n      } // the data section starts immediately after the PES header.\n      // pes_header_data_length specifies the number of header bytes\n      // that follow the last byte of the field.\n\n\n      pes.data = payload.subarray(9 + payload[8]);\n    },\n\n    /**\n      * Pass completely parsed PES packets to the next stream in the pipeline\n     **/\n    flushStream = function flushStream(stream, type, forceFlush) {\n      var packetData = new Uint8Array(stream.size),\n          event = {\n        type: type\n      },\n          i = 0,\n          offset = 0,\n          packetFlushable = false,\n          fragment; // do nothing if there is not enough buffered data for a complete\n      // PES header\n\n      if (!stream.data.length || stream.size < 9) {\n        return;\n      }\n\n      event.trackId = stream.data[0].pid; // reassemble the packet\n\n      for (i = 0; i < stream.data.length; i++) {\n        fragment = stream.data[i];\n        packetData.set(fragment.data, offset);\n        offset += fragment.data.byteLength;\n      } // parse assembled packet's PES header\n\n\n      parsePes(packetData, event); // non-video PES packets MUST have a non-zero PES_packet_length\n      // check that there is enough stream data to fill the packet\n\n      packetFlushable = type === 'video' || event.packetLength <= stream.size; // flush pending packets if the conditions are right\n\n      if (forceFlush || packetFlushable) {\n        stream.size = 0;\n        stream.data.length = 0;\n      } // only emit packets that are complete. this is to avoid assembling\n      // incomplete PES packets due to poor segmentation\n\n\n      if (packetFlushable) {\n        self.trigger('data', event);\n      }\n    };\n\n    _ElementaryStream.prototype.init.call(this);\n    /**\n     * Identifies M2TS packet types and parses PES packets using metadata\n     * parsed from the PMT\n     **/\n\n\n    this.push = function (data) {\n      ({\n        pat: function pat() {// we have to wait for the PMT to arrive as well before we\n          // have any meaningful metadata\n        },\n        pes: function pes() {\n          var stream, streamType;\n\n          switch (data.streamType) {\n            case streamTypes.H264_STREAM_TYPE:\n              stream = video;\n              streamType = 'video';\n              break;\n\n            case streamTypes.ADTS_STREAM_TYPE:\n              stream = audio;\n              streamType = 'audio';\n              break;\n\n            case streamTypes.METADATA_STREAM_TYPE:\n              stream = timedMetadata;\n              streamType = 'timed-metadata';\n              break;\n\n            default:\n              // ignore unknown stream types\n              return;\n          } // if a new packet is starting, we can flush the completed\n          // packet\n\n\n          if (data.payloadUnitStartIndicator) {\n            flushStream(stream, streamType, true);\n          } // buffer this fragment until we are sure we've received the\n          // complete payload\n\n\n          stream.data.push(data);\n          stream.size += data.data.byteLength;\n        },\n        pmt: function pmt() {\n          var event = {\n            type: 'metadata',\n            tracks: []\n          };\n          programMapTable = data.programMapTable; // translate audio and video streams to tracks\n\n          if (programMapTable.video !== null) {\n            event.tracks.push({\n              timelineStartInfo: {\n                baseMediaDecodeTime: 0\n              },\n              id: +programMapTable.video,\n              codec: 'avc',\n              type: 'video'\n            });\n          }\n\n          if (programMapTable.audio !== null) {\n            event.tracks.push({\n              timelineStartInfo: {\n                baseMediaDecodeTime: 0\n              },\n              id: +programMapTable.audio,\n              codec: 'adts',\n              type: 'audio'\n            });\n          }\n\n          segmentHadPmt = true;\n          self.trigger('data', event);\n        }\n      })[data.type]();\n    };\n\n    this.reset = function () {\n      video.size = 0;\n      video.data.length = 0;\n      audio.size = 0;\n      audio.data.length = 0;\n      this.trigger('reset');\n    };\n    /**\n     * Flush any remaining input. Video PES packets may be of variable\n     * length. Normally, the start of a new video packet can trigger the\n     * finalization of the previous packet. That is not possible if no\n     * more video is forthcoming, however. In that case, some other\n     * mechanism (like the end of the file) has to be employed. When it is\n     * clear that no additional data is forthcoming, calling this method\n     * will flush the buffered packets.\n     */\n\n\n    this.flushStreams_ = function () {\n      // !!THIS ORDER IS IMPORTANT!!\n      // video first then audio\n      flushStream(video, 'video');\n      flushStream(audio, 'audio');\n      flushStream(timedMetadata, 'timed-metadata');\n    };\n\n    this.flush = function () {\n      // if on flush we haven't had a pmt emitted\n      // and we have a pmt to emit. emit the pmt\n      // so that we trigger a trackinfo downstream.\n      if (!segmentHadPmt && programMapTable) {\n        var pmt = {\n          type: 'metadata',\n          tracks: []\n        }; // translate audio and video streams to tracks\n\n        if (programMapTable.video !== null) {\n          pmt.tracks.push({\n            timelineStartInfo: {\n              baseMediaDecodeTime: 0\n            },\n            id: +programMapTable.video,\n            codec: 'avc',\n            type: 'video'\n          });\n        }\n\n        if (programMapTable.audio !== null) {\n          pmt.tracks.push({\n            timelineStartInfo: {\n              baseMediaDecodeTime: 0\n            },\n            id: +programMapTable.audio,\n            codec: 'adts',\n            type: 'audio'\n          });\n        }\n\n        self.trigger('data', pmt);\n      }\n\n      segmentHadPmt = false;\n      this.flushStreams_();\n      this.trigger('done');\n    };\n  };\n\n  _ElementaryStream.prototype = new stream();\n  var m2ts = {\n    PAT_PID: 0x0000,\n    MP2T_PACKET_LENGTH: MP2T_PACKET_LENGTH$1,\n    TransportPacketStream: _TransportPacketStream,\n    TransportParseStream: _TransportParseStream,\n    ElementaryStream: _ElementaryStream,\n    TimestampRolloverStream: TimestampRolloverStream,\n    CaptionStream: captionStream.CaptionStream,\n    Cea608Stream: captionStream.Cea608Stream,\n    Cea708Stream: captionStream.Cea708Stream,\n    MetadataStream: metadataStream\n  };\n\n  for (var type in streamTypes) {\n    if (streamTypes.hasOwnProperty(type)) {\n      m2ts[type] = streamTypes[type];\n    }\n  }\n\n  var m2ts_1 = m2ts;\n  var ONE_SECOND_IN_TS$2 = clock.ONE_SECOND_IN_TS;\n\n  var _AdtsStream;\n\n  var ADTS_SAMPLING_FREQUENCIES$1 = [96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000, 7350];\n  /*\n   * Accepts a ElementaryStream and emits data events with parsed\n   * AAC Audio Frames of the individual packets. Input audio in ADTS\n   * format is unpacked and re-emitted as AAC frames.\n   *\n   * @see http://wiki.multimedia.cx/index.php?title=ADTS\n   * @see http://wiki.multimedia.cx/?title=Understanding_AAC\n   */\n\n  _AdtsStream = function AdtsStream(handlePartialSegments) {\n    var buffer,\n        frameNum = 0;\n\n    _AdtsStream.prototype.init.call(this);\n\n    this.skipWarn_ = function (start, end) {\n      this.trigger('log', {\n        level: 'warn',\n        message: \"adts skiping bytes \" + start + \" to \" + end + \" in frame \" + frameNum + \" outside syncword\"\n      });\n    };\n\n    this.push = function (packet) {\n      var i = 0,\n          frameLength,\n          protectionSkipBytes,\n          oldBuffer,\n          sampleCount,\n          adtsFrameDuration;\n\n      if (!handlePartialSegments) {\n        frameNum = 0;\n      }\n\n      if (packet.type !== 'audio') {\n        // ignore non-audio data\n        return;\n      } // Prepend any data in the buffer to the input data so that we can parse\n      // aac frames the cross a PES packet boundary\n\n\n      if (buffer && buffer.length) {\n        oldBuffer = buffer;\n        buffer = new Uint8Array(oldBuffer.byteLength + packet.data.byteLength);\n        buffer.set(oldBuffer);\n        buffer.set(packet.data, oldBuffer.byteLength);\n      } else {\n        buffer = packet.data;\n      } // unpack any ADTS frames which have been fully received\n      // for details on the ADTS header, see http://wiki.multimedia.cx/index.php?title=ADTS\n\n\n      var skip; // We use i + 7 here because we want to be able to parse the entire header.\n      // If we don't have enough bytes to do that, then we definitely won't have a full frame.\n\n      while (i + 7 < buffer.length) {\n        // Look for the start of an ADTS header..\n        if (buffer[i] !== 0xFF || (buffer[i + 1] & 0xF6) !== 0xF0) {\n          if (typeof skip !== 'number') {\n            skip = i;\n          } // If a valid header was not found,  jump one forward and attempt to\n          // find a valid ADTS header starting at the next byte\n\n\n          i++;\n          continue;\n        }\n\n        if (typeof skip === 'number') {\n          this.skipWarn_(skip, i);\n          skip = null;\n        } // The protection skip bit tells us if we have 2 bytes of CRC data at the\n        // end of the ADTS header\n\n\n        protectionSkipBytes = (~buffer[i + 1] & 0x01) * 2; // Frame length is a 13 bit integer starting 16 bits from the\n        // end of the sync sequence\n        // NOTE: frame length includes the size of the header\n\n        frameLength = (buffer[i + 3] & 0x03) << 11 | buffer[i + 4] << 3 | (buffer[i + 5] & 0xe0) >> 5;\n        sampleCount = ((buffer[i + 6] & 0x03) + 1) * 1024;\n        adtsFrameDuration = sampleCount * ONE_SECOND_IN_TS$2 / ADTS_SAMPLING_FREQUENCIES$1[(buffer[i + 2] & 0x3c) >>> 2]; // If we don't have enough data to actually finish this ADTS frame,\n        // then we have to wait for more data\n\n        if (buffer.byteLength - i < frameLength) {\n          break;\n        } // Otherwise, deliver the complete AAC frame\n\n\n        this.trigger('data', {\n          pts: packet.pts + frameNum * adtsFrameDuration,\n          dts: packet.dts + frameNum * adtsFrameDuration,\n          sampleCount: sampleCount,\n          audioobjecttype: (buffer[i + 2] >>> 6 & 0x03) + 1,\n          channelcount: (buffer[i + 2] & 1) << 2 | (buffer[i + 3] & 0xc0) >>> 6,\n          samplerate: ADTS_SAMPLING_FREQUENCIES$1[(buffer[i + 2] & 0x3c) >>> 2],\n          samplingfrequencyindex: (buffer[i + 2] & 0x3c) >>> 2,\n          // assume ISO/IEC 14496-12 AudioSampleEntry default of 16\n          samplesize: 16,\n          // data is the frame without it's header\n          data: buffer.subarray(i + 7 + protectionSkipBytes, i + frameLength)\n        });\n        frameNum++;\n        i += frameLength;\n      }\n\n      if (typeof skip === 'number') {\n        this.skipWarn_(skip, i);\n        skip = null;\n      } // remove processed bytes from the buffer.\n\n\n      buffer = buffer.subarray(i);\n    };\n\n    this.flush = function () {\n      frameNum = 0;\n      this.trigger('done');\n    };\n\n    this.reset = function () {\n      buffer = void 0;\n      this.trigger('reset');\n    };\n\n    this.endTimeline = function () {\n      buffer = void 0;\n      this.trigger('endedtimeline');\n    };\n  };\n\n  _AdtsStream.prototype = new stream();\n  var adts = _AdtsStream;\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   */\n\n  var ExpGolomb;\n  /**\n   * Parser for exponential Golomb codes, a variable-bitwidth number encoding\n   * scheme used by h264.\n   */\n\n  ExpGolomb = function ExpGolomb(workingData) {\n    var // the number of bytes left to examine in workingData\n    workingBytesAvailable = workingData.byteLength,\n        // the current word being examined\n    workingWord = 0,\n        // :uint\n    // the number of bits left to examine in the current word\n    workingBitsAvailable = 0; // :uint;\n    // ():uint\n\n    this.length = function () {\n      return 8 * workingBytesAvailable;\n    }; // ():uint\n\n\n    this.bitsAvailable = function () {\n      return 8 * workingBytesAvailable + workingBitsAvailable;\n    }; // ():void\n\n\n    this.loadWord = function () {\n      var position = workingData.byteLength - workingBytesAvailable,\n          workingBytes = new Uint8Array(4),\n          availableBytes = Math.min(4, workingBytesAvailable);\n\n      if (availableBytes === 0) {\n        throw new Error('no bytes available');\n      }\n\n      workingBytes.set(workingData.subarray(position, position + availableBytes));\n      workingWord = new DataView(workingBytes.buffer).getUint32(0); // track the amount of workingData that has been processed\n\n      workingBitsAvailable = availableBytes * 8;\n      workingBytesAvailable -= availableBytes;\n    }; // (count:int):void\n\n\n    this.skipBits = function (count) {\n      var skipBytes; // :int\n\n      if (workingBitsAvailable > count) {\n        workingWord <<= count;\n        workingBitsAvailable -= count;\n      } else {\n        count -= workingBitsAvailable;\n        skipBytes = Math.floor(count / 8);\n        count -= skipBytes * 8;\n        workingBytesAvailable -= skipBytes;\n        this.loadWord();\n        workingWord <<= count;\n        workingBitsAvailable -= count;\n      }\n    }; // (size:int):uint\n\n\n    this.readBits = function (size) {\n      var bits = Math.min(workingBitsAvailable, size),\n          // :uint\n      valu = workingWord >>> 32 - bits; // :uint\n      // if size > 31, handle error\n\n      workingBitsAvailable -= bits;\n\n      if (workingBitsAvailable > 0) {\n        workingWord <<= bits;\n      } else if (workingBytesAvailable > 0) {\n        this.loadWord();\n      }\n\n      bits = size - bits;\n\n      if (bits > 0) {\n        return valu << bits | this.readBits(bits);\n      }\n\n      return valu;\n    }; // ():uint\n\n\n    this.skipLeadingZeros = function () {\n      var leadingZeroCount; // :uint\n\n      for (leadingZeroCount = 0; leadingZeroCount < workingBitsAvailable; ++leadingZeroCount) {\n        if ((workingWord & 0x80000000 >>> leadingZeroCount) !== 0) {\n          // the first bit of working word is 1\n          workingWord <<= leadingZeroCount;\n          workingBitsAvailable -= leadingZeroCount;\n          return leadingZeroCount;\n        }\n      } // we exhausted workingWord and still have not found a 1\n\n\n      this.loadWord();\n      return leadingZeroCount + this.skipLeadingZeros();\n    }; // ():void\n\n\n    this.skipUnsignedExpGolomb = function () {\n      this.skipBits(1 + this.skipLeadingZeros());\n    }; // ():void\n\n\n    this.skipExpGolomb = function () {\n      this.skipBits(1 + this.skipLeadingZeros());\n    }; // ():uint\n\n\n    this.readUnsignedExpGolomb = function () {\n      var clz = this.skipLeadingZeros(); // :uint\n\n      return this.readBits(clz + 1) - 1;\n    }; // ():int\n\n\n    this.readExpGolomb = function () {\n      var valu = this.readUnsignedExpGolomb(); // :int\n\n      if (0x01 & valu) {\n        // the number is odd if the low order bit is set\n        return 1 + valu >>> 1; // add 1 to make it even, and divide by 2\n      }\n\n      return -1 * (valu >>> 1); // divide by two then make it negative\n    }; // Some convenience functions\n    // :Boolean\n\n\n    this.readBoolean = function () {\n      return this.readBits(1) === 1;\n    }; // ():int\n\n\n    this.readUnsignedByte = function () {\n      return this.readBits(8);\n    };\n\n    this.loadWord();\n  };\n\n  var expGolomb = ExpGolomb;\n\n  var _H264Stream, _NalByteStream;\n\n  var PROFILES_WITH_OPTIONAL_SPS_DATA;\n  /**\n   * Accepts a NAL unit byte stream and unpacks the embedded NAL units.\n   */\n\n  _NalByteStream = function NalByteStream() {\n    var syncPoint = 0,\n        i,\n        buffer;\n\n    _NalByteStream.prototype.init.call(this);\n    /*\n     * Scans a byte stream and triggers a data event with the NAL units found.\n     * @param {Object} data Event received from H264Stream\n     * @param {Uint8Array} data.data The h264 byte stream to be scanned\n     *\n     * @see H264Stream.push\n     */\n\n\n    this.push = function (data) {\n      var swapBuffer;\n\n      if (!buffer) {\n        buffer = data.data;\n      } else {\n        swapBuffer = new Uint8Array(buffer.byteLength + data.data.byteLength);\n        swapBuffer.set(buffer);\n        swapBuffer.set(data.data, buffer.byteLength);\n        buffer = swapBuffer;\n      }\n\n      var len = buffer.byteLength; // Rec. ITU-T H.264, Annex B\n      // scan for NAL unit boundaries\n      // a match looks like this:\n      // 0 0 1 .. NAL .. 0 0 1\n      // ^ sync point        ^ i\n      // or this:\n      // 0 0 1 .. NAL .. 0 0 0\n      // ^ sync point        ^ i\n      // advance the sync point to a NAL start, if necessary\n\n      for (; syncPoint < len - 3; syncPoint++) {\n        if (buffer[syncPoint + 2] === 1) {\n          // the sync point is properly aligned\n          i = syncPoint + 5;\n          break;\n        }\n      }\n\n      while (i < len) {\n        // look at the current byte to determine if we've hit the end of\n        // a NAL unit boundary\n        switch (buffer[i]) {\n          case 0:\n            // skip past non-sync sequences\n            if (buffer[i - 1] !== 0) {\n              i += 2;\n              break;\n            } else if (buffer[i - 2] !== 0) {\n              i++;\n              break;\n            } // deliver the NAL unit if it isn't empty\n\n\n            if (syncPoint + 3 !== i - 2) {\n              this.trigger('data', buffer.subarray(syncPoint + 3, i - 2));\n            } // drop trailing zeroes\n\n\n            do {\n              i++;\n            } while (buffer[i] !== 1 && i < len);\n\n            syncPoint = i - 2;\n            i += 3;\n            break;\n\n          case 1:\n            // skip past non-sync sequences\n            if (buffer[i - 1] !== 0 || buffer[i - 2] !== 0) {\n              i += 3;\n              break;\n            } // deliver the NAL unit\n\n\n            this.trigger('data', buffer.subarray(syncPoint + 3, i - 2));\n            syncPoint = i - 2;\n            i += 3;\n            break;\n\n          default:\n            // the current byte isn't a one or zero, so it cannot be part\n            // of a sync sequence\n            i += 3;\n            break;\n        }\n      } // filter out the NAL units that were delivered\n\n\n      buffer = buffer.subarray(syncPoint);\n      i -= syncPoint;\n      syncPoint = 0;\n    };\n\n    this.reset = function () {\n      buffer = null;\n      syncPoint = 0;\n      this.trigger('reset');\n    };\n\n    this.flush = function () {\n      // deliver the last buffered NAL unit\n      if (buffer && buffer.byteLength > 3) {\n        this.trigger('data', buffer.subarray(syncPoint + 3));\n      } // reset the stream state\n\n\n      buffer = null;\n      syncPoint = 0;\n      this.trigger('done');\n    };\n\n    this.endTimeline = function () {\n      this.flush();\n      this.trigger('endedtimeline');\n    };\n  };\n\n  _NalByteStream.prototype = new stream(); // values of profile_idc that indicate additional fields are included in the SPS\n  // see Recommendation ITU-T H.264 (4/2013),\n  // 7.3.2.1.1 Sequence parameter set data syntax\n\n  PROFILES_WITH_OPTIONAL_SPS_DATA = {\n    100: true,\n    110: true,\n    122: true,\n    244: true,\n    44: true,\n    83: true,\n    86: true,\n    118: true,\n    128: true,\n    // TODO: the three profiles below don't\n    // appear to have sps data in the specificiation anymore?\n    138: true,\n    139: true,\n    134: true\n  };\n  /**\n   * Accepts input from a ElementaryStream and produces H.264 NAL unit data\n   * events.\n   */\n\n  _H264Stream = function H264Stream() {\n    var nalByteStream = new _NalByteStream(),\n        self,\n        trackId,\n        currentPts,\n        currentDts,\n        discardEmulationPreventionBytes,\n        readSequenceParameterSet,\n        skipScalingList;\n\n    _H264Stream.prototype.init.call(this);\n\n    self = this;\n    /*\n     * Pushes a packet from a stream onto the NalByteStream\n     *\n     * @param {Object} packet - A packet received from a stream\n     * @param {Uint8Array} packet.data - The raw bytes of the packet\n     * @param {Number} packet.dts - Decode timestamp of the packet\n     * @param {Number} packet.pts - Presentation timestamp of the packet\n     * @param {Number} packet.trackId - The id of the h264 track this packet came from\n     * @param {('video'|'audio')} packet.type - The type of packet\n     *\n     */\n\n    this.push = function (packet) {\n      if (packet.type !== 'video') {\n        return;\n      }\n\n      trackId = packet.trackId;\n      currentPts = packet.pts;\n      currentDts = packet.dts;\n      nalByteStream.push(packet);\n    };\n    /*\n     * Identify NAL unit types and pass on the NALU, trackId, presentation and decode timestamps\n     * for the NALUs to the next stream component.\n     * Also, preprocess caption and sequence parameter NALUs.\n     *\n     * @param {Uint8Array} data - A NAL unit identified by `NalByteStream.push`\n     * @see NalByteStream.push\n     */\n\n\n    nalByteStream.on('data', function (data) {\n      var event = {\n        trackId: trackId,\n        pts: currentPts,\n        dts: currentDts,\n        data: data,\n        nalUnitTypeCode: data[0] & 0x1f\n      };\n\n      switch (event.nalUnitTypeCode) {\n        case 0x05:\n          event.nalUnitType = 'slice_layer_without_partitioning_rbsp_idr';\n          break;\n\n        case 0x06:\n          event.nalUnitType = 'sei_rbsp';\n          event.escapedRBSP = discardEmulationPreventionBytes(data.subarray(1));\n          break;\n\n        case 0x07:\n          event.nalUnitType = 'seq_parameter_set_rbsp';\n          event.escapedRBSP = discardEmulationPreventionBytes(data.subarray(1));\n          event.config = readSequenceParameterSet(event.escapedRBSP);\n          break;\n\n        case 0x08:\n          event.nalUnitType = 'pic_parameter_set_rbsp';\n          break;\n\n        case 0x09:\n          event.nalUnitType = 'access_unit_delimiter_rbsp';\n          break;\n      } // This triggers data on the H264Stream\n\n\n      self.trigger('data', event);\n    });\n    nalByteStream.on('done', function () {\n      self.trigger('done');\n    });\n    nalByteStream.on('partialdone', function () {\n      self.trigger('partialdone');\n    });\n    nalByteStream.on('reset', function () {\n      self.trigger('reset');\n    });\n    nalByteStream.on('endedtimeline', function () {\n      self.trigger('endedtimeline');\n    });\n\n    this.flush = function () {\n      nalByteStream.flush();\n    };\n\n    this.partialFlush = function () {\n      nalByteStream.partialFlush();\n    };\n\n    this.reset = function () {\n      nalByteStream.reset();\n    };\n\n    this.endTimeline = function () {\n      nalByteStream.endTimeline();\n    };\n    /**\n     * Advance the ExpGolomb decoder past a scaling list. The scaling\n     * list is optionally transmitted as part of a sequence parameter\n     * set and is not relevant to transmuxing.\n     * @param count {number} the number of entries in this scaling list\n     * @param expGolombDecoder {object} an ExpGolomb pointed to the\n     * start of a scaling list\n     * @see Recommendation ITU-T H.264, Section 7.3.2.1.1.1\n     */\n\n\n    skipScalingList = function skipScalingList(count, expGolombDecoder) {\n      var lastScale = 8,\n          nextScale = 8,\n          j,\n          deltaScale;\n\n      for (j = 0; j < count; j++) {\n        if (nextScale !== 0) {\n          deltaScale = expGolombDecoder.readExpGolomb();\n          nextScale = (lastScale + deltaScale + 256) % 256;\n        }\n\n        lastScale = nextScale === 0 ? lastScale : nextScale;\n      }\n    };\n    /**\n     * Expunge any \"Emulation Prevention\" bytes from a \"Raw Byte\n     * Sequence Payload\"\n     * @param data {Uint8Array} the bytes of a RBSP from a NAL\n     * unit\n     * @return {Uint8Array} the RBSP without any Emulation\n     * Prevention Bytes\n     */\n\n\n    discardEmulationPreventionBytes = function discardEmulationPreventionBytes(data) {\n      var length = data.byteLength,\n          emulationPreventionBytesPositions = [],\n          i = 1,\n          newLength,\n          newData; // Find all `Emulation Prevention Bytes`\n\n      while (i < length - 2) {\n        if (data[i] === 0 && data[i + 1] === 0 && data[i + 2] === 0x03) {\n          emulationPreventionBytesPositions.push(i + 2);\n          i += 2;\n        } else {\n          i++;\n        }\n      } // If no Emulation Prevention Bytes were found just return the original\n      // array\n\n\n      if (emulationPreventionBytesPositions.length === 0) {\n        return data;\n      } // Create a new array to hold the NAL unit data\n\n\n      newLength = length - emulationPreventionBytesPositions.length;\n      newData = new Uint8Array(newLength);\n      var sourceIndex = 0;\n\n      for (i = 0; i < newLength; sourceIndex++, i++) {\n        if (sourceIndex === emulationPreventionBytesPositions[0]) {\n          // Skip this byte\n          sourceIndex++; // Remove this position index\n\n          emulationPreventionBytesPositions.shift();\n        }\n\n        newData[i] = data[sourceIndex];\n      }\n\n      return newData;\n    };\n    /**\n     * Read a sequence parameter set and return some interesting video\n     * properties. A sequence parameter set is the H264 metadata that\n     * describes the properties of upcoming video frames.\n     * @param data {Uint8Array} the bytes of a sequence parameter set\n     * @return {object} an object with configuration parsed from the\n     * sequence parameter set, including the dimensions of the\n     * associated video frames.\n     */\n\n\n    readSequenceParameterSet = function readSequenceParameterSet(data) {\n      var frameCropLeftOffset = 0,\n          frameCropRightOffset = 0,\n          frameCropTopOffset = 0,\n          frameCropBottomOffset = 0,\n          expGolombDecoder,\n          profileIdc,\n          levelIdc,\n          profileCompatibility,\n          chromaFormatIdc,\n          picOrderCntType,\n          numRefFramesInPicOrderCntCycle,\n          picWidthInMbsMinus1,\n          picHeightInMapUnitsMinus1,\n          frameMbsOnlyFlag,\n          scalingListCount,\n          sarRatio = [1, 1],\n          aspectRatioIdc,\n          i;\n      expGolombDecoder = new expGolomb(data);\n      profileIdc = expGolombDecoder.readUnsignedByte(); // profile_idc\n\n      profileCompatibility = expGolombDecoder.readUnsignedByte(); // constraint_set[0-5]_flag\n\n      levelIdc = expGolombDecoder.readUnsignedByte(); // level_idc u(8)\n\n      expGolombDecoder.skipUnsignedExpGolomb(); // seq_parameter_set_id\n      // some profiles have more optional data we don't need\n\n      if (PROFILES_WITH_OPTIONAL_SPS_DATA[profileIdc]) {\n        chromaFormatIdc = expGolombDecoder.readUnsignedExpGolomb();\n\n        if (chromaFormatIdc === 3) {\n          expGolombDecoder.skipBits(1); // separate_colour_plane_flag\n        }\n\n        expGolombDecoder.skipUnsignedExpGolomb(); // bit_depth_luma_minus8\n\n        expGolombDecoder.skipUnsignedExpGolomb(); // bit_depth_chroma_minus8\n\n        expGolombDecoder.skipBits(1); // qpprime_y_zero_transform_bypass_flag\n\n        if (expGolombDecoder.readBoolean()) {\n          // seq_scaling_matrix_present_flag\n          scalingListCount = chromaFormatIdc !== 3 ? 8 : 12;\n\n          for (i = 0; i < scalingListCount; i++) {\n            if (expGolombDecoder.readBoolean()) {\n              // seq_scaling_list_present_flag[ i ]\n              if (i < 6) {\n                skipScalingList(16, expGolombDecoder);\n              } else {\n                skipScalingList(64, expGolombDecoder);\n              }\n            }\n          }\n        }\n      }\n\n      expGolombDecoder.skipUnsignedExpGolomb(); // log2_max_frame_num_minus4\n\n      picOrderCntType = expGolombDecoder.readUnsignedExpGolomb();\n\n      if (picOrderCntType === 0) {\n        expGolombDecoder.readUnsignedExpGolomb(); // log2_max_pic_order_cnt_lsb_minus4\n      } else if (picOrderCntType === 1) {\n        expGolombDecoder.skipBits(1); // delta_pic_order_always_zero_flag\n\n        expGolombDecoder.skipExpGolomb(); // offset_for_non_ref_pic\n\n        expGolombDecoder.skipExpGolomb(); // offset_for_top_to_bottom_field\n\n        numRefFramesInPicOrderCntCycle = expGolombDecoder.readUnsignedExpGolomb();\n\n        for (i = 0; i < numRefFramesInPicOrderCntCycle; i++) {\n          expGolombDecoder.skipExpGolomb(); // offset_for_ref_frame[ i ]\n        }\n      }\n\n      expGolombDecoder.skipUnsignedExpGolomb(); // max_num_ref_frames\n\n      expGolombDecoder.skipBits(1); // gaps_in_frame_num_value_allowed_flag\n\n      picWidthInMbsMinus1 = expGolombDecoder.readUnsignedExpGolomb();\n      picHeightInMapUnitsMinus1 = expGolombDecoder.readUnsignedExpGolomb();\n      frameMbsOnlyFlag = expGolombDecoder.readBits(1);\n\n      if (frameMbsOnlyFlag === 0) {\n        expGolombDecoder.skipBits(1); // mb_adaptive_frame_field_flag\n      }\n\n      expGolombDecoder.skipBits(1); // direct_8x8_inference_flag\n\n      if (expGolombDecoder.readBoolean()) {\n        // frame_cropping_flag\n        frameCropLeftOffset = expGolombDecoder.readUnsignedExpGolomb();\n        frameCropRightOffset = expGolombDecoder.readUnsignedExpGolomb();\n        frameCropTopOffset = expGolombDecoder.readUnsignedExpGolomb();\n        frameCropBottomOffset = expGolombDecoder.readUnsignedExpGolomb();\n      }\n\n      if (expGolombDecoder.readBoolean()) {\n        // vui_parameters_present_flag\n        if (expGolombDecoder.readBoolean()) {\n          // aspect_ratio_info_present_flag\n          aspectRatioIdc = expGolombDecoder.readUnsignedByte();\n\n          switch (aspectRatioIdc) {\n            case 1:\n              sarRatio = [1, 1];\n              break;\n\n            case 2:\n              sarRatio = [12, 11];\n              break;\n\n            case 3:\n              sarRatio = [10, 11];\n              break;\n\n            case 4:\n              sarRatio = [16, 11];\n              break;\n\n            case 5:\n              sarRatio = [40, 33];\n              break;\n\n            case 6:\n              sarRatio = [24, 11];\n              break;\n\n            case 7:\n              sarRatio = [20, 11];\n              break;\n\n            case 8:\n              sarRatio = [32, 11];\n              break;\n\n            case 9:\n              sarRatio = [80, 33];\n              break;\n\n            case 10:\n              sarRatio = [18, 11];\n              break;\n\n            case 11:\n              sarRatio = [15, 11];\n              break;\n\n            case 12:\n              sarRatio = [64, 33];\n              break;\n\n            case 13:\n              sarRatio = [160, 99];\n              break;\n\n            case 14:\n              sarRatio = [4, 3];\n              break;\n\n            case 15:\n              sarRatio = [3, 2];\n              break;\n\n            case 16:\n              sarRatio = [2, 1];\n              break;\n\n            case 255:\n              {\n                sarRatio = [expGolombDecoder.readUnsignedByte() << 8 | expGolombDecoder.readUnsignedByte(), expGolombDecoder.readUnsignedByte() << 8 | expGolombDecoder.readUnsignedByte()];\n                break;\n              }\n          }\n\n          if (sarRatio) {\n            sarRatio[0] / sarRatio[1];\n          }\n        }\n      }\n\n      return {\n        profileIdc: profileIdc,\n        levelIdc: levelIdc,\n        profileCompatibility: profileCompatibility,\n        width: (picWidthInMbsMinus1 + 1) * 16 - frameCropLeftOffset * 2 - frameCropRightOffset * 2,\n        height: (2 - frameMbsOnlyFlag) * (picHeightInMapUnitsMinus1 + 1) * 16 - frameCropTopOffset * 2 - frameCropBottomOffset * 2,\n        // sar is sample aspect ratio\n        sarRatio: sarRatio\n      };\n    };\n  };\n\n  _H264Stream.prototype = new stream();\n  var h264 = {\n    H264Stream: _H264Stream,\n    NalByteStream: _NalByteStream\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   *\n   * Utilities to detect basic properties and metadata about Aac data.\n   */\n\n  var ADTS_SAMPLING_FREQUENCIES = [96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000, 7350];\n\n  var parseId3TagSize = function parseId3TagSize(header, byteIndex) {\n    var returnSize = header[byteIndex + 6] << 21 | header[byteIndex + 7] << 14 | header[byteIndex + 8] << 7 | header[byteIndex + 9],\n        flags = header[byteIndex + 5],\n        footerPresent = (flags & 16) >> 4; // if we get a negative returnSize clamp it to 0\n\n    returnSize = returnSize >= 0 ? returnSize : 0;\n\n    if (footerPresent) {\n      return returnSize + 20;\n    }\n\n    return returnSize + 10;\n  };\n\n  var getId3Offset = function getId3Offset(data, offset) {\n    if (data.length - offset < 10 || data[offset] !== 'I'.charCodeAt(0) || data[offset + 1] !== 'D'.charCodeAt(0) || data[offset + 2] !== '3'.charCodeAt(0)) {\n      return offset;\n    }\n\n    offset += parseId3TagSize(data, offset);\n    return getId3Offset(data, offset);\n  }; // TODO: use vhs-utils\n\n\n  var isLikelyAacData$1 = function isLikelyAacData(data) {\n    var offset = getId3Offset(data, 0);\n    return data.length >= offset + 2 && (data[offset] & 0xFF) === 0xFF && (data[offset + 1] & 0xF0) === 0xF0 && // verify that the 2 layer bits are 0, aka this\n    // is not mp3 data but aac data.\n    (data[offset + 1] & 0x16) === 0x10;\n  };\n\n  var parseSyncSafeInteger = function parseSyncSafeInteger(data) {\n    return data[0] << 21 | data[1] << 14 | data[2] << 7 | data[3];\n  }; // return a percent-encoded representation of the specified byte range\n  // @see http://en.wikipedia.org/wiki/Percent-encoding\n\n\n  var percentEncode = function percentEncode(bytes, start, end) {\n    var i,\n        result = '';\n\n    for (i = start; i < end; i++) {\n      result += '%' + ('00' + bytes[i].toString(16)).slice(-2);\n    }\n\n    return result;\n  }; // return the string representation of the specified byte range,\n  // interpreted as ISO-8859-1.\n\n\n  var parseIso88591 = function parseIso88591(bytes, start, end) {\n    return unescape(percentEncode(bytes, start, end)); // jshint ignore:line\n  };\n\n  var parseAdtsSize = function parseAdtsSize(header, byteIndex) {\n    var lowThree = (header[byteIndex + 5] & 0xE0) >> 5,\n        middle = header[byteIndex + 4] << 3,\n        highTwo = header[byteIndex + 3] & 0x3 << 11;\n    return highTwo | middle | lowThree;\n  };\n\n  var parseType$2 = function parseType(header, byteIndex) {\n    if (header[byteIndex] === 'I'.charCodeAt(0) && header[byteIndex + 1] === 'D'.charCodeAt(0) && header[byteIndex + 2] === '3'.charCodeAt(0)) {\n      return 'timed-metadata';\n    } else if (header[byteIndex] & 0xff === 0xff && (header[byteIndex + 1] & 0xf0) === 0xf0) {\n      return 'audio';\n    }\n\n    return null;\n  };\n\n  var parseSampleRate = function parseSampleRate(packet) {\n    var i = 0;\n\n    while (i + 5 < packet.length) {\n      if (packet[i] !== 0xFF || (packet[i + 1] & 0xF6) !== 0xF0) {\n        // If a valid header was not found,  jump one forward and attempt to\n        // find a valid ADTS header starting at the next byte\n        i++;\n        continue;\n      }\n\n      return ADTS_SAMPLING_FREQUENCIES[(packet[i + 2] & 0x3c) >>> 2];\n    }\n\n    return null;\n  };\n\n  var parseAacTimestamp = function parseAacTimestamp(packet) {\n    var frameStart, frameSize, frame, frameHeader; // find the start of the first frame and the end of the tag\n\n    frameStart = 10;\n\n    if (packet[5] & 0x40) {\n      // advance the frame start past the extended header\n      frameStart += 4; // header size field\n\n      frameStart += parseSyncSafeInteger(packet.subarray(10, 14));\n    } // parse one or more ID3 frames\n    // http://id3.org/id3v2.3.0#ID3v2_frame_overview\n\n\n    do {\n      // determine the number of bytes in this frame\n      frameSize = parseSyncSafeInteger(packet.subarray(frameStart + 4, frameStart + 8));\n\n      if (frameSize < 1) {\n        return null;\n      }\n\n      frameHeader = String.fromCharCode(packet[frameStart], packet[frameStart + 1], packet[frameStart + 2], packet[frameStart + 3]);\n\n      if (frameHeader === 'PRIV') {\n        frame = packet.subarray(frameStart + 10, frameStart + frameSize + 10);\n\n        for (var i = 0; i < frame.byteLength; i++) {\n          if (frame[i] === 0) {\n            var owner = parseIso88591(frame, 0, i);\n\n            if (owner === 'com.apple.streaming.transportStreamTimestamp') {\n              var d = frame.subarray(i + 1);\n              var size = (d[3] & 0x01) << 30 | d[4] << 22 | d[5] << 14 | d[6] << 6 | d[7] >>> 2;\n              size *= 4;\n              size += d[7] & 0x03;\n              return size;\n            }\n\n            break;\n          }\n        }\n      }\n\n      frameStart += 10; // advance past the frame header\n\n      frameStart += frameSize; // advance past the frame body\n    } while (frameStart < packet.byteLength);\n\n    return null;\n  };\n\n  var utils = {\n    isLikelyAacData: isLikelyAacData$1,\n    parseId3TagSize: parseId3TagSize,\n    parseAdtsSize: parseAdtsSize,\n    parseType: parseType$2,\n    parseSampleRate: parseSampleRate,\n    parseAacTimestamp: parseAacTimestamp\n  };\n\n  var _AacStream;\n  /**\n   * Splits an incoming stream of binary data into ADTS and ID3 Frames.\n   */\n\n\n  _AacStream = function AacStream() {\n    var everything = new Uint8Array(),\n        timeStamp = 0;\n\n    _AacStream.prototype.init.call(this);\n\n    this.setTimestamp = function (timestamp) {\n      timeStamp = timestamp;\n    };\n\n    this.push = function (bytes) {\n      var frameSize = 0,\n          byteIndex = 0,\n          bytesLeft,\n          chunk,\n          packet,\n          tempLength; // If there are bytes remaining from the last segment, prepend them to the\n      // bytes that were pushed in\n\n      if (everything.length) {\n        tempLength = everything.length;\n        everything = new Uint8Array(bytes.byteLength + tempLength);\n        everything.set(everything.subarray(0, tempLength));\n        everything.set(bytes, tempLength);\n      } else {\n        everything = bytes;\n      }\n\n      while (everything.length - byteIndex >= 3) {\n        if (everything[byteIndex] === 'I'.charCodeAt(0) && everything[byteIndex + 1] === 'D'.charCodeAt(0) && everything[byteIndex + 2] === '3'.charCodeAt(0)) {\n          // Exit early because we don't have enough to parse\n          // the ID3 tag header\n          if (everything.length - byteIndex < 10) {\n            break;\n          } // check framesize\n\n\n          frameSize = utils.parseId3TagSize(everything, byteIndex); // Exit early if we don't have enough in the buffer\n          // to emit a full packet\n          // Add to byteIndex to support multiple ID3 tags in sequence\n\n          if (byteIndex + frameSize > everything.length) {\n            break;\n          }\n\n          chunk = {\n            type: 'timed-metadata',\n            data: everything.subarray(byteIndex, byteIndex + frameSize)\n          };\n          this.trigger('data', chunk);\n          byteIndex += frameSize;\n          continue;\n        } else if ((everything[byteIndex] & 0xff) === 0xff && (everything[byteIndex + 1] & 0xf0) === 0xf0) {\n          // Exit early because we don't have enough to parse\n          // the ADTS frame header\n          if (everything.length - byteIndex < 7) {\n            break;\n          }\n\n          frameSize = utils.parseAdtsSize(everything, byteIndex); // Exit early if we don't have enough in the buffer\n          // to emit a full packet\n\n          if (byteIndex + frameSize > everything.length) {\n            break;\n          }\n\n          packet = {\n            type: 'audio',\n            data: everything.subarray(byteIndex, byteIndex + frameSize),\n            pts: timeStamp,\n            dts: timeStamp\n          };\n          this.trigger('data', packet);\n          byteIndex += frameSize;\n          continue;\n        }\n\n        byteIndex++;\n      }\n\n      bytesLeft = everything.length - byteIndex;\n\n      if (bytesLeft > 0) {\n        everything = everything.subarray(byteIndex);\n      } else {\n        everything = new Uint8Array();\n      }\n    };\n\n    this.reset = function () {\n      everything = new Uint8Array();\n      this.trigger('reset');\n    };\n\n    this.endTimeline = function () {\n      everything = new Uint8Array();\n      this.trigger('endedtimeline');\n    };\n  };\n\n  _AacStream.prototype = new stream();\n  var aac = _AacStream; // constants\n\n  var AUDIO_PROPERTIES = ['audioobjecttype', 'channelcount', 'samplerate', 'samplingfrequencyindex', 'samplesize'];\n  var audioProperties = AUDIO_PROPERTIES;\n  var VIDEO_PROPERTIES = ['width', 'height', 'profileIdc', 'levelIdc', 'profileCompatibility', 'sarRatio'];\n  var videoProperties = VIDEO_PROPERTIES;\n  var H264Stream = h264.H264Stream;\n  var isLikelyAacData = utils.isLikelyAacData;\n  var ONE_SECOND_IN_TS$1 = clock.ONE_SECOND_IN_TS; // object types\n\n  var _VideoSegmentStream, _AudioSegmentStream, _Transmuxer, _CoalesceStream;\n\n  var retriggerForStream = function retriggerForStream(key, event) {\n    event.stream = key;\n    this.trigger('log', event);\n  };\n\n  var addPipelineLogRetriggers = function addPipelineLogRetriggers(transmuxer, pipeline) {\n    var keys = Object.keys(pipeline);\n\n    for (var i = 0; i < keys.length; i++) {\n      var key = keys[i]; // skip non-stream keys and headOfPipeline\n      // which is just a duplicate\n\n      if (key === 'headOfPipeline' || !pipeline[key].on) {\n        continue;\n      }\n\n      pipeline[key].on('log', retriggerForStream.bind(transmuxer, key));\n    }\n  };\n  /**\n   * Compare two arrays (even typed) for same-ness\n   */\n\n\n  var arrayEquals = function arrayEquals(a, b) {\n    var i;\n\n    if (a.length !== b.length) {\n      return false;\n    } // compare the value of each element in the array\n\n\n    for (i = 0; i < a.length; i++) {\n      if (a[i] !== b[i]) {\n        return false;\n      }\n    }\n\n    return true;\n  };\n\n  var generateSegmentTimingInfo = function generateSegmentTimingInfo(baseMediaDecodeTime, startDts, startPts, endDts, endPts, prependedContentDuration) {\n    var ptsOffsetFromDts = startPts - startDts,\n        decodeDuration = endDts - startDts,\n        presentationDuration = endPts - startPts; // The PTS and DTS values are based on the actual stream times from the segment,\n    // however, the player time values will reflect a start from the baseMediaDecodeTime.\n    // In order to provide relevant values for the player times, base timing info on the\n    // baseMediaDecodeTime and the DTS and PTS durations of the segment.\n\n    return {\n      start: {\n        dts: baseMediaDecodeTime,\n        pts: baseMediaDecodeTime + ptsOffsetFromDts\n      },\n      end: {\n        dts: baseMediaDecodeTime + decodeDuration,\n        pts: baseMediaDecodeTime + presentationDuration\n      },\n      prependedContentDuration: prependedContentDuration,\n      baseMediaDecodeTime: baseMediaDecodeTime\n    };\n  };\n  /**\n   * Constructs a single-track, ISO BMFF media segment from AAC data\n   * events. The output of this stream can be fed to a SourceBuffer\n   * configured with a suitable initialization segment.\n   * @param track {object} track metadata configuration\n   * @param options {object} transmuxer options object\n   * @param options.keepOriginalTimestamps {boolean} If true, keep the timestamps\n   *        in the source; false to adjust the first segment to start at 0.\n   */\n\n\n  _AudioSegmentStream = function AudioSegmentStream(track, options) {\n    var adtsFrames = [],\n        sequenceNumber,\n        earliestAllowedDts = 0,\n        audioAppendStartTs = 0,\n        videoBaseMediaDecodeTime = Infinity;\n    options = options || {};\n    sequenceNumber = options.firstSequenceNumber || 0;\n\n    _AudioSegmentStream.prototype.init.call(this);\n\n    this.push = function (data) {\n      trackDecodeInfo.collectDtsInfo(track, data);\n\n      if (track) {\n        audioProperties.forEach(function (prop) {\n          track[prop] = data[prop];\n        });\n      } // buffer audio data until end() is called\n\n\n      adtsFrames.push(data);\n    };\n\n    this.setEarliestDts = function (earliestDts) {\n      earliestAllowedDts = earliestDts;\n    };\n\n    this.setVideoBaseMediaDecodeTime = function (baseMediaDecodeTime) {\n      videoBaseMediaDecodeTime = baseMediaDecodeTime;\n    };\n\n    this.setAudioAppendStart = function (timestamp) {\n      audioAppendStartTs = timestamp;\n    };\n\n    this.flush = function () {\n      var frames, moof, mdat, boxes, frameDuration, segmentDuration, videoClockCyclesOfSilencePrefixed; // return early if no audio data has been observed\n\n      if (adtsFrames.length === 0) {\n        this.trigger('done', 'AudioSegmentStream');\n        return;\n      }\n\n      frames = audioFrameUtils.trimAdtsFramesByEarliestDts(adtsFrames, track, earliestAllowedDts);\n      track.baseMediaDecodeTime = trackDecodeInfo.calculateTrackBaseMediaDecodeTime(track, options.keepOriginalTimestamps); // amount of audio filled but the value is in video clock rather than audio clock\n\n      videoClockCyclesOfSilencePrefixed = audioFrameUtils.prefixWithSilence(track, frames, audioAppendStartTs, videoBaseMediaDecodeTime); // we have to build the index from byte locations to\n      // samples (that is, adts frames) in the audio data\n\n      track.samples = audioFrameUtils.generateSampleTable(frames); // concatenate the audio data to constuct the mdat\n\n      mdat = mp4Generator.mdat(audioFrameUtils.concatenateFrameData(frames));\n      adtsFrames = [];\n      moof = mp4Generator.moof(sequenceNumber, [track]);\n      boxes = new Uint8Array(moof.byteLength + mdat.byteLength); // bump the sequence number for next time\n\n      sequenceNumber++;\n      boxes.set(moof);\n      boxes.set(mdat, moof.byteLength);\n      trackDecodeInfo.clearDtsInfo(track);\n      frameDuration = Math.ceil(ONE_SECOND_IN_TS$1 * 1024 / track.samplerate); // TODO this check was added to maintain backwards compatibility (particularly with\n      // tests) on adding the timingInfo event. However, it seems unlikely that there's a\n      // valid use-case where an init segment/data should be triggered without associated\n      // frames. Leaving for now, but should be looked into.\n\n      if (frames.length) {\n        segmentDuration = frames.length * frameDuration;\n        this.trigger('segmentTimingInfo', generateSegmentTimingInfo( // The audio track's baseMediaDecodeTime is in audio clock cycles, but the\n        // frame info is in video clock cycles. Convert to match expectation of\n        // listeners (that all timestamps will be based on video clock cycles).\n        clock.audioTsToVideoTs(track.baseMediaDecodeTime, track.samplerate), // frame times are already in video clock, as is segment duration\n        frames[0].dts, frames[0].pts, frames[0].dts + segmentDuration, frames[0].pts + segmentDuration, videoClockCyclesOfSilencePrefixed || 0));\n        this.trigger('timingInfo', {\n          start: frames[0].pts,\n          end: frames[0].pts + segmentDuration\n        });\n      }\n\n      this.trigger('data', {\n        track: track,\n        boxes: boxes\n      });\n      this.trigger('done', 'AudioSegmentStream');\n    };\n\n    this.reset = function () {\n      trackDecodeInfo.clearDtsInfo(track);\n      adtsFrames = [];\n      this.trigger('reset');\n    };\n  };\n\n  _AudioSegmentStream.prototype = new stream();\n  /**\n   * Constructs a single-track, ISO BMFF media segment from H264 data\n   * events. The output of this stream can be fed to a SourceBuffer\n   * configured with a suitable initialization segment.\n   * @param track {object} track metadata configuration\n   * @param options {object} transmuxer options object\n   * @param options.alignGopsAtEnd {boolean} If true, start from the end of the\n   *        gopsToAlignWith list when attempting to align gop pts\n   * @param options.keepOriginalTimestamps {boolean} If true, keep the timestamps\n   *        in the source; false to adjust the first segment to start at 0.\n   */\n\n  _VideoSegmentStream = function VideoSegmentStream(track, options) {\n    var sequenceNumber,\n        nalUnits = [],\n        gopsToAlignWith = [],\n        config,\n        pps;\n    options = options || {};\n    sequenceNumber = options.firstSequenceNumber || 0;\n\n    _VideoSegmentStream.prototype.init.call(this);\n\n    delete track.minPTS;\n    this.gopCache_ = [];\n    /**\n      * Constructs a ISO BMFF segment given H264 nalUnits\n      * @param {Object} nalUnit A data event representing a nalUnit\n      * @param {String} nalUnit.nalUnitType\n      * @param {Object} nalUnit.config Properties for a mp4 track\n      * @param {Uint8Array} nalUnit.data The nalUnit bytes\n      * @see lib/codecs/h264.js\n     **/\n\n    this.push = function (nalUnit) {\n      trackDecodeInfo.collectDtsInfo(track, nalUnit); // record the track config\n\n      if (nalUnit.nalUnitType === 'seq_parameter_set_rbsp' && !config) {\n        config = nalUnit.config;\n        track.sps = [nalUnit.data];\n        videoProperties.forEach(function (prop) {\n          track[prop] = config[prop];\n        }, this);\n      }\n\n      if (nalUnit.nalUnitType === 'pic_parameter_set_rbsp' && !pps) {\n        pps = nalUnit.data;\n        track.pps = [nalUnit.data];\n      } // buffer video until flush() is called\n\n\n      nalUnits.push(nalUnit);\n    };\n    /**\n      * Pass constructed ISO BMFF track and boxes on to the\n      * next stream in the pipeline\n     **/\n\n\n    this.flush = function () {\n      var frames,\n          gopForFusion,\n          gops,\n          moof,\n          mdat,\n          boxes,\n          prependedContentDuration = 0,\n          firstGop,\n          lastGop; // Throw away nalUnits at the start of the byte stream until\n      // we find the first AUD\n\n      while (nalUnits.length) {\n        if (nalUnits[0].nalUnitType === 'access_unit_delimiter_rbsp') {\n          break;\n        }\n\n        nalUnits.shift();\n      } // Return early if no video data has been observed\n\n\n      if (nalUnits.length === 0) {\n        this.resetStream_();\n        this.trigger('done', 'VideoSegmentStream');\n        return;\n      } // Organize the raw nal-units into arrays that represent\n      // higher-level constructs such as frames and gops\n      // (group-of-pictures)\n\n\n      frames = frameUtils.groupNalsIntoFrames(nalUnits);\n      gops = frameUtils.groupFramesIntoGops(frames); // If the first frame of this fragment is not a keyframe we have\n      // a problem since MSE (on Chrome) requires a leading keyframe.\n      //\n      // We have two approaches to repairing this situation:\n      // 1) GOP-FUSION:\n      //    This is where we keep track of the GOPS (group-of-pictures)\n      //    from previous fragments and attempt to find one that we can\n      //    prepend to the current fragment in order to create a valid\n      //    fragment.\n      // 2) KEYFRAME-PULLING:\n      //    Here we search for the first keyframe in the fragment and\n      //    throw away all the frames between the start of the fragment\n      //    and that keyframe. We then extend the duration and pull the\n      //    PTS of the keyframe forward so that it covers the time range\n      //    of the frames that were disposed of.\n      //\n      // #1 is far prefereable over #2 which can cause \"stuttering\" but\n      // requires more things to be just right.\n\n      if (!gops[0][0].keyFrame) {\n        // Search for a gop for fusion from our gopCache\n        gopForFusion = this.getGopForFusion_(nalUnits[0], track);\n\n        if (gopForFusion) {\n          // in order to provide more accurate timing information about the segment, save\n          // the number of seconds prepended to the original segment due to GOP fusion\n          prependedContentDuration = gopForFusion.duration;\n          gops.unshift(gopForFusion); // Adjust Gops' metadata to account for the inclusion of the\n          // new gop at the beginning\n\n          gops.byteLength += gopForFusion.byteLength;\n          gops.nalCount += gopForFusion.nalCount;\n          gops.pts = gopForFusion.pts;\n          gops.dts = gopForFusion.dts;\n          gops.duration += gopForFusion.duration;\n        } else {\n          // If we didn't find a candidate gop fall back to keyframe-pulling\n          gops = frameUtils.extendFirstKeyFrame(gops);\n        }\n      } // Trim gops to align with gopsToAlignWith\n\n\n      if (gopsToAlignWith.length) {\n        var alignedGops;\n\n        if (options.alignGopsAtEnd) {\n          alignedGops = this.alignGopsAtEnd_(gops);\n        } else {\n          alignedGops = this.alignGopsAtStart_(gops);\n        }\n\n        if (!alignedGops) {\n          // save all the nals in the last GOP into the gop cache\n          this.gopCache_.unshift({\n            gop: gops.pop(),\n            pps: track.pps,\n            sps: track.sps\n          }); // Keep a maximum of 6 GOPs in the cache\n\n          this.gopCache_.length = Math.min(6, this.gopCache_.length); // Clear nalUnits\n\n          nalUnits = []; // return early no gops can be aligned with desired gopsToAlignWith\n\n          this.resetStream_();\n          this.trigger('done', 'VideoSegmentStream');\n          return;\n        } // Some gops were trimmed. clear dts info so minSegmentDts and pts are correct\n        // when recalculated before sending off to CoalesceStream\n\n\n        trackDecodeInfo.clearDtsInfo(track);\n        gops = alignedGops;\n      }\n\n      trackDecodeInfo.collectDtsInfo(track, gops); // First, we have to build the index from byte locations to\n      // samples (that is, frames) in the video data\n\n      track.samples = frameUtils.generateSampleTable(gops); // Concatenate the video data and construct the mdat\n\n      mdat = mp4Generator.mdat(frameUtils.concatenateNalData(gops));\n      track.baseMediaDecodeTime = trackDecodeInfo.calculateTrackBaseMediaDecodeTime(track, options.keepOriginalTimestamps);\n      this.trigger('processedGopsInfo', gops.map(function (gop) {\n        return {\n          pts: gop.pts,\n          dts: gop.dts,\n          byteLength: gop.byteLength\n        };\n      }));\n      firstGop = gops[0];\n      lastGop = gops[gops.length - 1];\n      this.trigger('segmentTimingInfo', generateSegmentTimingInfo(track.baseMediaDecodeTime, firstGop.dts, firstGop.pts, lastGop.dts + lastGop.duration, lastGop.pts + lastGop.duration, prependedContentDuration));\n      this.trigger('timingInfo', {\n        start: gops[0].pts,\n        end: gops[gops.length - 1].pts + gops[gops.length - 1].duration\n      }); // save all the nals in the last GOP into the gop cache\n\n      this.gopCache_.unshift({\n        gop: gops.pop(),\n        pps: track.pps,\n        sps: track.sps\n      }); // Keep a maximum of 6 GOPs in the cache\n\n      this.gopCache_.length = Math.min(6, this.gopCache_.length); // Clear nalUnits\n\n      nalUnits = [];\n      this.trigger('baseMediaDecodeTime', track.baseMediaDecodeTime);\n      this.trigger('timelineStartInfo', track.timelineStartInfo);\n      moof = mp4Generator.moof(sequenceNumber, [track]); // it would be great to allocate this array up front instead of\n      // throwing away hundreds of media segment fragments\n\n      boxes = new Uint8Array(moof.byteLength + mdat.byteLength); // Bump the sequence number for next time\n\n      sequenceNumber++;\n      boxes.set(moof);\n      boxes.set(mdat, moof.byteLength);\n      this.trigger('data', {\n        track: track,\n        boxes: boxes\n      });\n      this.resetStream_(); // Continue with the flush process now\n\n      this.trigger('done', 'VideoSegmentStream');\n    };\n\n    this.reset = function () {\n      this.resetStream_();\n      nalUnits = [];\n      this.gopCache_.length = 0;\n      gopsToAlignWith.length = 0;\n      this.trigger('reset');\n    };\n\n    this.resetStream_ = function () {\n      trackDecodeInfo.clearDtsInfo(track); // reset config and pps because they may differ across segments\n      // for instance, when we are rendition switching\n\n      config = undefined;\n      pps = undefined;\n    }; // Search for a candidate Gop for gop-fusion from the gop cache and\n    // return it or return null if no good candidate was found\n\n\n    this.getGopForFusion_ = function (nalUnit) {\n      var halfSecond = 45000,\n          // Half-a-second in a 90khz clock\n      allowableOverlap = 10000,\n          // About 3 frames @ 30fps\n      nearestDistance = Infinity,\n          dtsDistance,\n          nearestGopObj,\n          currentGop,\n          currentGopObj,\n          i; // Search for the GOP nearest to the beginning of this nal unit\n\n      for (i = 0; i < this.gopCache_.length; i++) {\n        currentGopObj = this.gopCache_[i];\n        currentGop = currentGopObj.gop; // Reject Gops with different SPS or PPS\n\n        if (!(track.pps && arrayEquals(track.pps[0], currentGopObj.pps[0])) || !(track.sps && arrayEquals(track.sps[0], currentGopObj.sps[0]))) {\n          continue;\n        } // Reject Gops that would require a negative baseMediaDecodeTime\n\n\n        if (currentGop.dts < track.timelineStartInfo.dts) {\n          continue;\n        } // The distance between the end of the gop and the start of the nalUnit\n\n\n        dtsDistance = nalUnit.dts - currentGop.dts - currentGop.duration; // Only consider GOPS that start before the nal unit and end within\n        // a half-second of the nal unit\n\n        if (dtsDistance >= -allowableOverlap && dtsDistance <= halfSecond) {\n          // Always use the closest GOP we found if there is more than\n          // one candidate\n          if (!nearestGopObj || nearestDistance > dtsDistance) {\n            nearestGopObj = currentGopObj;\n            nearestDistance = dtsDistance;\n          }\n        }\n      }\n\n      if (nearestGopObj) {\n        return nearestGopObj.gop;\n      }\n\n      return null;\n    }; // trim gop list to the first gop found that has a matching pts with a gop in the list\n    // of gopsToAlignWith starting from the START of the list\n\n\n    this.alignGopsAtStart_ = function (gops) {\n      var alignIndex, gopIndex, align, gop, byteLength, nalCount, duration, alignedGops;\n      byteLength = gops.byteLength;\n      nalCount = gops.nalCount;\n      duration = gops.duration;\n      alignIndex = gopIndex = 0;\n\n      while (alignIndex < gopsToAlignWith.length && gopIndex < gops.length) {\n        align = gopsToAlignWith[alignIndex];\n        gop = gops[gopIndex];\n\n        if (align.pts === gop.pts) {\n          break;\n        }\n\n        if (gop.pts > align.pts) {\n          // this current gop starts after the current gop we want to align on, so increment\n          // align index\n          alignIndex++;\n          continue;\n        } // current gop starts before the current gop we want to align on. so increment gop\n        // index\n\n\n        gopIndex++;\n        byteLength -= gop.byteLength;\n        nalCount -= gop.nalCount;\n        duration -= gop.duration;\n      }\n\n      if (gopIndex === 0) {\n        // no gops to trim\n        return gops;\n      }\n\n      if (gopIndex === gops.length) {\n        // all gops trimmed, skip appending all gops\n        return null;\n      }\n\n      alignedGops = gops.slice(gopIndex);\n      alignedGops.byteLength = byteLength;\n      alignedGops.duration = duration;\n      alignedGops.nalCount = nalCount;\n      alignedGops.pts = alignedGops[0].pts;\n      alignedGops.dts = alignedGops[0].dts;\n      return alignedGops;\n    }; // trim gop list to the first gop found that has a matching pts with a gop in the list\n    // of gopsToAlignWith starting from the END of the list\n\n\n    this.alignGopsAtEnd_ = function (gops) {\n      var alignIndex, gopIndex, align, gop, alignEndIndex, matchFound;\n      alignIndex = gopsToAlignWith.length - 1;\n      gopIndex = gops.length - 1;\n      alignEndIndex = null;\n      matchFound = false;\n\n      while (alignIndex >= 0 && gopIndex >= 0) {\n        align = gopsToAlignWith[alignIndex];\n        gop = gops[gopIndex];\n\n        if (align.pts === gop.pts) {\n          matchFound = true;\n          break;\n        }\n\n        if (align.pts > gop.pts) {\n          alignIndex--;\n          continue;\n        }\n\n        if (alignIndex === gopsToAlignWith.length - 1) {\n          // gop.pts is greater than the last alignment candidate. If no match is found\n          // by the end of this loop, we still want to append gops that come after this\n          // point\n          alignEndIndex = gopIndex;\n        }\n\n        gopIndex--;\n      }\n\n      if (!matchFound && alignEndIndex === null) {\n        return null;\n      }\n\n      var trimIndex;\n\n      if (matchFound) {\n        trimIndex = gopIndex;\n      } else {\n        trimIndex = alignEndIndex;\n      }\n\n      if (trimIndex === 0) {\n        return gops;\n      }\n\n      var alignedGops = gops.slice(trimIndex);\n      var metadata = alignedGops.reduce(function (total, gop) {\n        total.byteLength += gop.byteLength;\n        total.duration += gop.duration;\n        total.nalCount += gop.nalCount;\n        return total;\n      }, {\n        byteLength: 0,\n        duration: 0,\n        nalCount: 0\n      });\n      alignedGops.byteLength = metadata.byteLength;\n      alignedGops.duration = metadata.duration;\n      alignedGops.nalCount = metadata.nalCount;\n      alignedGops.pts = alignedGops[0].pts;\n      alignedGops.dts = alignedGops[0].dts;\n      return alignedGops;\n    };\n\n    this.alignGopsWith = function (newGopsToAlignWith) {\n      gopsToAlignWith = newGopsToAlignWith;\n    };\n  };\n\n  _VideoSegmentStream.prototype = new stream();\n  /**\n   * A Stream that can combine multiple streams (ie. audio & video)\n   * into a single output segment for MSE. Also supports audio-only\n   * and video-only streams.\n   * @param options {object} transmuxer options object\n   * @param options.keepOriginalTimestamps {boolean} If true, keep the timestamps\n   *        in the source; false to adjust the first segment to start at media timeline start.\n   */\n\n  _CoalesceStream = function CoalesceStream(options, metadataStream) {\n    // Number of Tracks per output segment\n    // If greater than 1, we combine multiple\n    // tracks into a single segment\n    this.numberOfTracks = 0;\n    this.metadataStream = metadataStream;\n    options = options || {};\n\n    if (typeof options.remux !== 'undefined') {\n      this.remuxTracks = !!options.remux;\n    } else {\n      this.remuxTracks = true;\n    }\n\n    if (typeof options.keepOriginalTimestamps === 'boolean') {\n      this.keepOriginalTimestamps = options.keepOriginalTimestamps;\n    } else {\n      this.keepOriginalTimestamps = false;\n    }\n\n    this.pendingTracks = [];\n    this.videoTrack = null;\n    this.pendingBoxes = [];\n    this.pendingCaptions = [];\n    this.pendingMetadata = [];\n    this.pendingBytes = 0;\n    this.emittedTracks = 0;\n\n    _CoalesceStream.prototype.init.call(this); // Take output from multiple\n\n\n    this.push = function (output) {\n      // buffer incoming captions until the associated video segment\n      // finishes\n      if (output.text) {\n        return this.pendingCaptions.push(output);\n      } // buffer incoming id3 tags until the final flush\n\n\n      if (output.frames) {\n        return this.pendingMetadata.push(output);\n      } // Add this track to the list of pending tracks and store\n      // important information required for the construction of\n      // the final segment\n\n\n      this.pendingTracks.push(output.track);\n      this.pendingBytes += output.boxes.byteLength; // TODO: is there an issue for this against chrome?\n      // We unshift audio and push video because\n      // as of Chrome 75 when switching from\n      // one init segment to another if the video\n      // mdat does not appear after the audio mdat\n      // only audio will play for the duration of our transmux.\n\n      if (output.track.type === 'video') {\n        this.videoTrack = output.track;\n        this.pendingBoxes.push(output.boxes);\n      }\n\n      if (output.track.type === 'audio') {\n        this.audioTrack = output.track;\n        this.pendingBoxes.unshift(output.boxes);\n      }\n    };\n  };\n\n  _CoalesceStream.prototype = new stream();\n\n  _CoalesceStream.prototype.flush = function (flushSource) {\n    var offset = 0,\n        event = {\n      captions: [],\n      captionStreams: {},\n      metadata: [],\n      info: {}\n    },\n        caption,\n        id3,\n        initSegment,\n        timelineStartPts = 0,\n        i;\n\n    if (this.pendingTracks.length < this.numberOfTracks) {\n      if (flushSource !== 'VideoSegmentStream' && flushSource !== 'AudioSegmentStream') {\n        // Return because we haven't received a flush from a data-generating\n        // portion of the segment (meaning that we have only recieved meta-data\n        // or captions.)\n        return;\n      } else if (this.remuxTracks) {\n        // Return until we have enough tracks from the pipeline to remux (if we\n        // are remuxing audio and video into a single MP4)\n        return;\n      } else if (this.pendingTracks.length === 0) {\n        // In the case where we receive a flush without any data having been\n        // received we consider it an emitted track for the purposes of coalescing\n        // `done` events.\n        // We do this for the case where there is an audio and video track in the\n        // segment but no audio data. (seen in several playlists with alternate\n        // audio tracks and no audio present in the main TS segments.)\n        this.emittedTracks++;\n\n        if (this.emittedTracks >= this.numberOfTracks) {\n          this.trigger('done');\n          this.emittedTracks = 0;\n        }\n\n        return;\n      }\n    }\n\n    if (this.videoTrack) {\n      timelineStartPts = this.videoTrack.timelineStartInfo.pts;\n      videoProperties.forEach(function (prop) {\n        event.info[prop] = this.videoTrack[prop];\n      }, this);\n    } else if (this.audioTrack) {\n      timelineStartPts = this.audioTrack.timelineStartInfo.pts;\n      audioProperties.forEach(function (prop) {\n        event.info[prop] = this.audioTrack[prop];\n      }, this);\n    }\n\n    if (this.videoTrack || this.audioTrack) {\n      if (this.pendingTracks.length === 1) {\n        event.type = this.pendingTracks[0].type;\n      } else {\n        event.type = 'combined';\n      }\n\n      this.emittedTracks += this.pendingTracks.length;\n      initSegment = mp4Generator.initSegment(this.pendingTracks); // Create a new typed array to hold the init segment\n\n      event.initSegment = new Uint8Array(initSegment.byteLength); // Create an init segment containing a moov\n      // and track definitions\n\n      event.initSegment.set(initSegment); // Create a new typed array to hold the moof+mdats\n\n      event.data = new Uint8Array(this.pendingBytes); // Append each moof+mdat (one per track) together\n\n      for (i = 0; i < this.pendingBoxes.length; i++) {\n        event.data.set(this.pendingBoxes[i], offset);\n        offset += this.pendingBoxes[i].byteLength;\n      } // Translate caption PTS times into second offsets to match the\n      // video timeline for the segment, and add track info\n\n\n      for (i = 0; i < this.pendingCaptions.length; i++) {\n        caption = this.pendingCaptions[i];\n        caption.startTime = clock.metadataTsToSeconds(caption.startPts, timelineStartPts, this.keepOriginalTimestamps);\n        caption.endTime = clock.metadataTsToSeconds(caption.endPts, timelineStartPts, this.keepOriginalTimestamps);\n        event.captionStreams[caption.stream] = true;\n        event.captions.push(caption);\n      } // Translate ID3 frame PTS times into second offsets to match the\n      // video timeline for the segment\n\n\n      for (i = 0; i < this.pendingMetadata.length; i++) {\n        id3 = this.pendingMetadata[i];\n        id3.cueTime = clock.metadataTsToSeconds(id3.pts, timelineStartPts, this.keepOriginalTimestamps);\n        event.metadata.push(id3);\n      } // We add this to every single emitted segment even though we only need\n      // it for the first\n\n\n      event.metadata.dispatchType = this.metadataStream.dispatchType; // Reset stream state\n\n      this.pendingTracks.length = 0;\n      this.videoTrack = null;\n      this.pendingBoxes.length = 0;\n      this.pendingCaptions.length = 0;\n      this.pendingBytes = 0;\n      this.pendingMetadata.length = 0; // Emit the built segment\n      // We include captions and ID3 tags for backwards compatibility,\n      // ideally we should send only video and audio in the data event\n\n      this.trigger('data', event); // Emit each caption to the outside world\n      // Ideally, this would happen immediately on parsing captions,\n      // but we need to ensure that video data is sent back first\n      // so that caption timing can be adjusted to match video timing\n\n      for (i = 0; i < event.captions.length; i++) {\n        caption = event.captions[i];\n        this.trigger('caption', caption);\n      } // Emit each id3 tag to the outside world\n      // Ideally, this would happen immediately on parsing the tag,\n      // but we need to ensure that video data is sent back first\n      // so that ID3 frame timing can be adjusted to match video timing\n\n\n      for (i = 0; i < event.metadata.length; i++) {\n        id3 = event.metadata[i];\n        this.trigger('id3Frame', id3);\n      }\n    } // Only emit `done` if all tracks have been flushed and emitted\n\n\n    if (this.emittedTracks >= this.numberOfTracks) {\n      this.trigger('done');\n      this.emittedTracks = 0;\n    }\n  };\n\n  _CoalesceStream.prototype.setRemux = function (val) {\n    this.remuxTracks = val;\n  };\n  /**\n   * A Stream that expects MP2T binary data as input and produces\n   * corresponding media segments, suitable for use with Media Source\n   * Extension (MSE) implementations that support the ISO BMFF byte\n   * stream format, like Chrome.\n   */\n\n\n  _Transmuxer = function Transmuxer(options) {\n    var self = this,\n        hasFlushed = true,\n        videoTrack,\n        audioTrack;\n\n    _Transmuxer.prototype.init.call(this);\n\n    options = options || {};\n    this.baseMediaDecodeTime = options.baseMediaDecodeTime || 0;\n    this.transmuxPipeline_ = {};\n\n    this.setupAacPipeline = function () {\n      var pipeline = {};\n      this.transmuxPipeline_ = pipeline;\n      pipeline.type = 'aac';\n      pipeline.metadataStream = new m2ts_1.MetadataStream(); // set up the parsing pipeline\n\n      pipeline.aacStream = new aac();\n      pipeline.audioTimestampRolloverStream = new m2ts_1.TimestampRolloverStream('audio');\n      pipeline.timedMetadataTimestampRolloverStream = new m2ts_1.TimestampRolloverStream('timed-metadata');\n      pipeline.adtsStream = new adts();\n      pipeline.coalesceStream = new _CoalesceStream(options, pipeline.metadataStream);\n      pipeline.headOfPipeline = pipeline.aacStream;\n      pipeline.aacStream.pipe(pipeline.audioTimestampRolloverStream).pipe(pipeline.adtsStream);\n      pipeline.aacStream.pipe(pipeline.timedMetadataTimestampRolloverStream).pipe(pipeline.metadataStream).pipe(pipeline.coalesceStream);\n      pipeline.metadataStream.on('timestamp', function (frame) {\n        pipeline.aacStream.setTimestamp(frame.timeStamp);\n      });\n      pipeline.aacStream.on('data', function (data) {\n        if (data.type !== 'timed-metadata' && data.type !== 'audio' || pipeline.audioSegmentStream) {\n          return;\n        }\n\n        audioTrack = audioTrack || {\n          timelineStartInfo: {\n            baseMediaDecodeTime: self.baseMediaDecodeTime\n          },\n          codec: 'adts',\n          type: 'audio'\n        }; // hook up the audio segment stream to the first track with aac data\n\n        pipeline.coalesceStream.numberOfTracks++;\n        pipeline.audioSegmentStream = new _AudioSegmentStream(audioTrack, options);\n        pipeline.audioSegmentStream.on('log', self.getLogTrigger_('audioSegmentStream'));\n        pipeline.audioSegmentStream.on('timingInfo', self.trigger.bind(self, 'audioTimingInfo')); // Set up the final part of the audio pipeline\n\n        pipeline.adtsStream.pipe(pipeline.audioSegmentStream).pipe(pipeline.coalesceStream); // emit pmt info\n\n        self.trigger('trackinfo', {\n          hasAudio: !!audioTrack,\n          hasVideo: !!videoTrack\n        });\n      }); // Re-emit any data coming from the coalesce stream to the outside world\n\n      pipeline.coalesceStream.on('data', this.trigger.bind(this, 'data')); // Let the consumer know we have finished flushing the entire pipeline\n\n      pipeline.coalesceStream.on('done', this.trigger.bind(this, 'done'));\n      addPipelineLogRetriggers(this, pipeline);\n    };\n\n    this.setupTsPipeline = function () {\n      var pipeline = {};\n      this.transmuxPipeline_ = pipeline;\n      pipeline.type = 'ts';\n      pipeline.metadataStream = new m2ts_1.MetadataStream(); // set up the parsing pipeline\n\n      pipeline.packetStream = new m2ts_1.TransportPacketStream();\n      pipeline.parseStream = new m2ts_1.TransportParseStream();\n      pipeline.elementaryStream = new m2ts_1.ElementaryStream();\n      pipeline.timestampRolloverStream = new m2ts_1.TimestampRolloverStream();\n      pipeline.adtsStream = new adts();\n      pipeline.h264Stream = new H264Stream();\n      pipeline.captionStream = new m2ts_1.CaptionStream(options);\n      pipeline.coalesceStream = new _CoalesceStream(options, pipeline.metadataStream);\n      pipeline.headOfPipeline = pipeline.packetStream; // disassemble MPEG2-TS packets into elementary streams\n\n      pipeline.packetStream.pipe(pipeline.parseStream).pipe(pipeline.elementaryStream).pipe(pipeline.timestampRolloverStream); // !!THIS ORDER IS IMPORTANT!!\n      // demux the streams\n\n      pipeline.timestampRolloverStream.pipe(pipeline.h264Stream);\n      pipeline.timestampRolloverStream.pipe(pipeline.adtsStream);\n      pipeline.timestampRolloverStream.pipe(pipeline.metadataStream).pipe(pipeline.coalesceStream); // Hook up CEA-608/708 caption stream\n\n      pipeline.h264Stream.pipe(pipeline.captionStream).pipe(pipeline.coalesceStream);\n      pipeline.elementaryStream.on('data', function (data) {\n        var i;\n\n        if (data.type === 'metadata') {\n          i = data.tracks.length; // scan the tracks listed in the metadata\n\n          while (i--) {\n            if (!videoTrack && data.tracks[i].type === 'video') {\n              videoTrack = data.tracks[i];\n              videoTrack.timelineStartInfo.baseMediaDecodeTime = self.baseMediaDecodeTime;\n            } else if (!audioTrack && data.tracks[i].type === 'audio') {\n              audioTrack = data.tracks[i];\n              audioTrack.timelineStartInfo.baseMediaDecodeTime = self.baseMediaDecodeTime;\n            }\n          } // hook up the video segment stream to the first track with h264 data\n\n\n          if (videoTrack && !pipeline.videoSegmentStream) {\n            pipeline.coalesceStream.numberOfTracks++;\n            pipeline.videoSegmentStream = new _VideoSegmentStream(videoTrack, options);\n            pipeline.videoSegmentStream.on('log', self.getLogTrigger_('videoSegmentStream'));\n            pipeline.videoSegmentStream.on('timelineStartInfo', function (timelineStartInfo) {\n              // When video emits timelineStartInfo data after a flush, we forward that\n              // info to the AudioSegmentStream, if it exists, because video timeline\n              // data takes precedence.  Do not do this if keepOriginalTimestamps is set,\n              // because this is a particularly subtle form of timestamp alteration.\n              if (audioTrack && !options.keepOriginalTimestamps) {\n                audioTrack.timelineStartInfo = timelineStartInfo; // On the first segment we trim AAC frames that exist before the\n                // very earliest DTS we have seen in video because Chrome will\n                // interpret any video track with a baseMediaDecodeTime that is\n                // non-zero as a gap.\n\n                pipeline.audioSegmentStream.setEarliestDts(timelineStartInfo.dts - self.baseMediaDecodeTime);\n              }\n            });\n            pipeline.videoSegmentStream.on('processedGopsInfo', self.trigger.bind(self, 'gopInfo'));\n            pipeline.videoSegmentStream.on('segmentTimingInfo', self.trigger.bind(self, 'videoSegmentTimingInfo'));\n            pipeline.videoSegmentStream.on('baseMediaDecodeTime', function (baseMediaDecodeTime) {\n              if (audioTrack) {\n                pipeline.audioSegmentStream.setVideoBaseMediaDecodeTime(baseMediaDecodeTime);\n              }\n            });\n            pipeline.videoSegmentStream.on('timingInfo', self.trigger.bind(self, 'videoTimingInfo')); // Set up the final part of the video pipeline\n\n            pipeline.h264Stream.pipe(pipeline.videoSegmentStream).pipe(pipeline.coalesceStream);\n          }\n\n          if (audioTrack && !pipeline.audioSegmentStream) {\n            // hook up the audio segment stream to the first track with aac data\n            pipeline.coalesceStream.numberOfTracks++;\n            pipeline.audioSegmentStream = new _AudioSegmentStream(audioTrack, options);\n            pipeline.audioSegmentStream.on('log', self.getLogTrigger_('audioSegmentStream'));\n            pipeline.audioSegmentStream.on('timingInfo', self.trigger.bind(self, 'audioTimingInfo'));\n            pipeline.audioSegmentStream.on('segmentTimingInfo', self.trigger.bind(self, 'audioSegmentTimingInfo')); // Set up the final part of the audio pipeline\n\n            pipeline.adtsStream.pipe(pipeline.audioSegmentStream).pipe(pipeline.coalesceStream);\n          } // emit pmt info\n\n\n          self.trigger('trackinfo', {\n            hasAudio: !!audioTrack,\n            hasVideo: !!videoTrack\n          });\n        }\n      }); // Re-emit any data coming from the coalesce stream to the outside world\n\n      pipeline.coalesceStream.on('data', this.trigger.bind(this, 'data'));\n      pipeline.coalesceStream.on('id3Frame', function (id3Frame) {\n        id3Frame.dispatchType = pipeline.metadataStream.dispatchType;\n        self.trigger('id3Frame', id3Frame);\n      });\n      pipeline.coalesceStream.on('caption', this.trigger.bind(this, 'caption')); // Let the consumer know we have finished flushing the entire pipeline\n\n      pipeline.coalesceStream.on('done', this.trigger.bind(this, 'done'));\n      addPipelineLogRetriggers(this, pipeline);\n    }; // hook up the segment streams once track metadata is delivered\n\n\n    this.setBaseMediaDecodeTime = function (baseMediaDecodeTime) {\n      var pipeline = this.transmuxPipeline_;\n\n      if (!options.keepOriginalTimestamps) {\n        this.baseMediaDecodeTime = baseMediaDecodeTime;\n      }\n\n      if (audioTrack) {\n        audioTrack.timelineStartInfo.dts = undefined;\n        audioTrack.timelineStartInfo.pts = undefined;\n        trackDecodeInfo.clearDtsInfo(audioTrack);\n\n        if (pipeline.audioTimestampRolloverStream) {\n          pipeline.audioTimestampRolloverStream.discontinuity();\n        }\n      }\n\n      if (videoTrack) {\n        if (pipeline.videoSegmentStream) {\n          pipeline.videoSegmentStream.gopCache_ = [];\n        }\n\n        videoTrack.timelineStartInfo.dts = undefined;\n        videoTrack.timelineStartInfo.pts = undefined;\n        trackDecodeInfo.clearDtsInfo(videoTrack);\n        pipeline.captionStream.reset();\n      }\n\n      if (pipeline.timestampRolloverStream) {\n        pipeline.timestampRolloverStream.discontinuity();\n      }\n    };\n\n    this.setAudioAppendStart = function (timestamp) {\n      if (audioTrack) {\n        this.transmuxPipeline_.audioSegmentStream.setAudioAppendStart(timestamp);\n      }\n    };\n\n    this.setRemux = function (val) {\n      var pipeline = this.transmuxPipeline_;\n      options.remux = val;\n\n      if (pipeline && pipeline.coalesceStream) {\n        pipeline.coalesceStream.setRemux(val);\n      }\n    };\n\n    this.alignGopsWith = function (gopsToAlignWith) {\n      if (videoTrack && this.transmuxPipeline_.videoSegmentStream) {\n        this.transmuxPipeline_.videoSegmentStream.alignGopsWith(gopsToAlignWith);\n      }\n    };\n\n    this.getLogTrigger_ = function (key) {\n      var self = this;\n      return function (event) {\n        event.stream = key;\n        self.trigger('log', event);\n      };\n    }; // feed incoming data to the front of the parsing pipeline\n\n\n    this.push = function (data) {\n      if (hasFlushed) {\n        var isAac = isLikelyAacData(data);\n\n        if (isAac && this.transmuxPipeline_.type !== 'aac') {\n          this.setupAacPipeline();\n        } else if (!isAac && this.transmuxPipeline_.type !== 'ts') {\n          this.setupTsPipeline();\n        }\n\n        hasFlushed = false;\n      }\n\n      this.transmuxPipeline_.headOfPipeline.push(data);\n    }; // flush any buffered data\n\n\n    this.flush = function () {\n      hasFlushed = true; // Start at the top of the pipeline and flush all pending work\n\n      this.transmuxPipeline_.headOfPipeline.flush();\n    };\n\n    this.endTimeline = function () {\n      this.transmuxPipeline_.headOfPipeline.endTimeline();\n    };\n\n    this.reset = function () {\n      if (this.transmuxPipeline_.headOfPipeline) {\n        this.transmuxPipeline_.headOfPipeline.reset();\n      }\n    }; // Caption data has to be reset when seeking outside buffered range\n\n\n    this.resetCaptions = function () {\n      if (this.transmuxPipeline_.captionStream) {\n        this.transmuxPipeline_.captionStream.reset();\n      }\n    };\n  };\n\n  _Transmuxer.prototype = new stream();\n  var transmuxer = {\n    Transmuxer: _Transmuxer,\n    VideoSegmentStream: _VideoSegmentStream,\n    AudioSegmentStream: _AudioSegmentStream,\n    AUDIO_PROPERTIES: audioProperties,\n    VIDEO_PROPERTIES: videoProperties,\n    // exported for testing\n    generateSegmentTimingInfo: generateSegmentTimingInfo\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   */\n\n  var toUnsigned$3 = function toUnsigned(value) {\n    return value >>> 0;\n  };\n\n  var toHexString$1 = function toHexString(value) {\n    return ('00' + value.toString(16)).slice(-2);\n  };\n\n  var bin = {\n    toUnsigned: toUnsigned$3,\n    toHexString: toHexString$1\n  };\n\n  var parseType$1 = function parseType(buffer) {\n    var result = '';\n    result += String.fromCharCode(buffer[0]);\n    result += String.fromCharCode(buffer[1]);\n    result += String.fromCharCode(buffer[2]);\n    result += String.fromCharCode(buffer[3]);\n    return result;\n  };\n\n  var parseType_1 = parseType$1;\n  var toUnsigned$2 = bin.toUnsigned;\n\n  var findBox = function findBox(data, path) {\n    var results = [],\n        i,\n        size,\n        type,\n        end,\n        subresults;\n\n    if (!path.length) {\n      // short-circuit the search for empty paths\n      return null;\n    }\n\n    for (i = 0; i < data.byteLength;) {\n      size = toUnsigned$2(data[i] << 24 | data[i + 1] << 16 | data[i + 2] << 8 | data[i + 3]);\n      type = parseType_1(data.subarray(i + 4, i + 8));\n      end = size > 1 ? i + size : data.byteLength;\n\n      if (type === path[0]) {\n        if (path.length === 1) {\n          // this is the end of the path and we've found the box we were\n          // looking for\n          results.push(data.subarray(i + 8, end));\n        } else {\n          // recursively search for the next box along the path\n          subresults = findBox(data.subarray(i + 8, end), path.slice(1));\n\n          if (subresults.length) {\n            results = results.concat(subresults);\n          }\n        }\n      }\n\n      i = end;\n    } // we've finished searching all of data\n\n\n    return results;\n  };\n\n  var findBox_1 = findBox;\n  var toUnsigned$1 = bin.toUnsigned;\n  var getUint64$1 = numbers.getUint64;\n\n  var tfdt = function tfdt(data) {\n    var result = {\n      version: data[0],\n      flags: new Uint8Array(data.subarray(1, 4))\n    };\n\n    if (result.version === 1) {\n      result.baseMediaDecodeTime = getUint64$1(data.subarray(4));\n    } else {\n      result.baseMediaDecodeTime = toUnsigned$1(data[4] << 24 | data[5] << 16 | data[6] << 8 | data[7]);\n    }\n\n    return result;\n  };\n\n  var parseTfdt = tfdt;\n\n  var parseSampleFlags = function parseSampleFlags(flags) {\n    return {\n      isLeading: (flags[0] & 0x0c) >>> 2,\n      dependsOn: flags[0] & 0x03,\n      isDependedOn: (flags[1] & 0xc0) >>> 6,\n      hasRedundancy: (flags[1] & 0x30) >>> 4,\n      paddingValue: (flags[1] & 0x0e) >>> 1,\n      isNonSyncSample: flags[1] & 0x01,\n      degradationPriority: flags[2] << 8 | flags[3]\n    };\n  };\n\n  var parseSampleFlags_1 = parseSampleFlags;\n\n  var trun = function trun(data) {\n    var result = {\n      version: data[0],\n      flags: new Uint8Array(data.subarray(1, 4)),\n      samples: []\n    },\n        view = new DataView(data.buffer, data.byteOffset, data.byteLength),\n        // Flag interpretation\n    dataOffsetPresent = result.flags[2] & 0x01,\n        // compare with 2nd byte of 0x1\n    firstSampleFlagsPresent = result.flags[2] & 0x04,\n        // compare with 2nd byte of 0x4\n    sampleDurationPresent = result.flags[1] & 0x01,\n        // compare with 2nd byte of 0x100\n    sampleSizePresent = result.flags[1] & 0x02,\n        // compare with 2nd byte of 0x200\n    sampleFlagsPresent = result.flags[1] & 0x04,\n        // compare with 2nd byte of 0x400\n    sampleCompositionTimeOffsetPresent = result.flags[1] & 0x08,\n        // compare with 2nd byte of 0x800\n    sampleCount = view.getUint32(4),\n        offset = 8,\n        sample;\n\n    if (dataOffsetPresent) {\n      // 32 bit signed integer\n      result.dataOffset = view.getInt32(offset);\n      offset += 4;\n    } // Overrides the flags for the first sample only. The order of\n    // optional values will be: duration, size, compositionTimeOffset\n\n\n    if (firstSampleFlagsPresent && sampleCount) {\n      sample = {\n        flags: parseSampleFlags_1(data.subarray(offset, offset + 4))\n      };\n      offset += 4;\n\n      if (sampleDurationPresent) {\n        sample.duration = view.getUint32(offset);\n        offset += 4;\n      }\n\n      if (sampleSizePresent) {\n        sample.size = view.getUint32(offset);\n        offset += 4;\n      }\n\n      if (sampleCompositionTimeOffsetPresent) {\n        if (result.version === 1) {\n          sample.compositionTimeOffset = view.getInt32(offset);\n        } else {\n          sample.compositionTimeOffset = view.getUint32(offset);\n        }\n\n        offset += 4;\n      }\n\n      result.samples.push(sample);\n      sampleCount--;\n    }\n\n    while (sampleCount--) {\n      sample = {};\n\n      if (sampleDurationPresent) {\n        sample.duration = view.getUint32(offset);\n        offset += 4;\n      }\n\n      if (sampleSizePresent) {\n        sample.size = view.getUint32(offset);\n        offset += 4;\n      }\n\n      if (sampleFlagsPresent) {\n        sample.flags = parseSampleFlags_1(data.subarray(offset, offset + 4));\n        offset += 4;\n      }\n\n      if (sampleCompositionTimeOffsetPresent) {\n        if (result.version === 1) {\n          sample.compositionTimeOffset = view.getInt32(offset);\n        } else {\n          sample.compositionTimeOffset = view.getUint32(offset);\n        }\n\n        offset += 4;\n      }\n\n      result.samples.push(sample);\n    }\n\n    return result;\n  };\n\n  var parseTrun = trun;\n\n  var tfhd = function tfhd(data) {\n    var view = new DataView(data.buffer, data.byteOffset, data.byteLength),\n        result = {\n      version: data[0],\n      flags: new Uint8Array(data.subarray(1, 4)),\n      trackId: view.getUint32(4)\n    },\n        baseDataOffsetPresent = result.flags[2] & 0x01,\n        sampleDescriptionIndexPresent = result.flags[2] & 0x02,\n        defaultSampleDurationPresent = result.flags[2] & 0x08,\n        defaultSampleSizePresent = result.flags[2] & 0x10,\n        defaultSampleFlagsPresent = result.flags[2] & 0x20,\n        durationIsEmpty = result.flags[0] & 0x010000,\n        defaultBaseIsMoof = result.flags[0] & 0x020000,\n        i;\n    i = 8;\n\n    if (baseDataOffsetPresent) {\n      i += 4; // truncate top 4 bytes\n      // FIXME: should we read the full 64 bits?\n\n      result.baseDataOffset = view.getUint32(12);\n      i += 4;\n    }\n\n    if (sampleDescriptionIndexPresent) {\n      result.sampleDescriptionIndex = view.getUint32(i);\n      i += 4;\n    }\n\n    if (defaultSampleDurationPresent) {\n      result.defaultSampleDuration = view.getUint32(i);\n      i += 4;\n    }\n\n    if (defaultSampleSizePresent) {\n      result.defaultSampleSize = view.getUint32(i);\n      i += 4;\n    }\n\n    if (defaultSampleFlagsPresent) {\n      result.defaultSampleFlags = view.getUint32(i);\n    }\n\n    if (durationIsEmpty) {\n      result.durationIsEmpty = true;\n    }\n\n    if (!baseDataOffsetPresent && defaultBaseIsMoof) {\n      result.baseDataOffsetIsMoof = true;\n    }\n\n    return result;\n  };\n\n  var parseTfhd = tfhd;\n  var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};\n  var win;\n\n  if (typeof window !== \"undefined\") {\n    win = window;\n  } else if (typeof commonjsGlobal !== \"undefined\") {\n    win = commonjsGlobal;\n  } else if (typeof self !== \"undefined\") {\n    win = self;\n  } else {\n    win = {};\n  }\n\n  var window_1 = win;\n  var discardEmulationPreventionBytes = captionPacketParser.discardEmulationPreventionBytes;\n  var CaptionStream = captionStream.CaptionStream;\n  /**\n    * Maps an offset in the mdat to a sample based on the the size of the samples.\n    * Assumes that `parseSamples` has been called first.\n    *\n    * @param {Number} offset - The offset into the mdat\n    * @param {Object[]} samples - An array of samples, parsed using `parseSamples`\n    * @return {?Object} The matching sample, or null if no match was found.\n    *\n    * @see ISO-BMFF-12/2015, Section 8.8.8\n   **/\n\n  var mapToSample = function mapToSample(offset, samples) {\n    var approximateOffset = offset;\n\n    for (var i = 0; i < samples.length; i++) {\n      var sample = samples[i];\n\n      if (approximateOffset < sample.size) {\n        return sample;\n      }\n\n      approximateOffset -= sample.size;\n    }\n\n    return null;\n  };\n  /**\n    * Finds SEI nal units contained in a Media Data Box.\n    * Assumes that `parseSamples` has been called first.\n    *\n    * @param {Uint8Array} avcStream - The bytes of the mdat\n    * @param {Object[]} samples - The samples parsed out by `parseSamples`\n    * @param {Number} trackId - The trackId of this video track\n    * @return {Object[]} seiNals - the parsed SEI NALUs found.\n    *   The contents of the seiNal should match what is expected by\n    *   CaptionStream.push (nalUnitType, size, data, escapedRBSP, pts, dts)\n    *\n    * @see ISO-BMFF-12/2015, Section 8.1.1\n    * @see Rec. ITU-T H.264, 7.3.2.3.1\n   **/\n\n\n  var findSeiNals = function findSeiNals(avcStream, samples, trackId) {\n    var avcView = new DataView(avcStream.buffer, avcStream.byteOffset, avcStream.byteLength),\n        result = {\n      logs: [],\n      seiNals: []\n    },\n        seiNal,\n        i,\n        length,\n        lastMatchedSample;\n\n    for (i = 0; i + 4 < avcStream.length; i += length) {\n      length = avcView.getUint32(i);\n      i += 4; // Bail if this doesn't appear to be an H264 stream\n\n      if (length <= 0) {\n        continue;\n      }\n\n      switch (avcStream[i] & 0x1F) {\n        case 0x06:\n          var data = avcStream.subarray(i + 1, i + 1 + length);\n          var matchingSample = mapToSample(i, samples);\n          seiNal = {\n            nalUnitType: 'sei_rbsp',\n            size: length,\n            data: data,\n            escapedRBSP: discardEmulationPreventionBytes(data),\n            trackId: trackId\n          };\n\n          if (matchingSample) {\n            seiNal.pts = matchingSample.pts;\n            seiNal.dts = matchingSample.dts;\n            lastMatchedSample = matchingSample;\n          } else if (lastMatchedSample) {\n            // If a matching sample cannot be found, use the last\n            // sample's values as they should be as close as possible\n            seiNal.pts = lastMatchedSample.pts;\n            seiNal.dts = lastMatchedSample.dts;\n          } else {\n            result.logs.push({\n              level: 'warn',\n              message: 'We\\'ve encountered a nal unit without data at ' + i + ' for trackId ' + trackId + '. See mux.js#223.'\n            });\n            break;\n          }\n\n          result.seiNals.push(seiNal);\n          break;\n      }\n    }\n\n    return result;\n  };\n  /**\n    * Parses sample information out of Track Run Boxes and calculates\n    * the absolute presentation and decode timestamps of each sample.\n    *\n    * @param {Array<Uint8Array>} truns - The Trun Run boxes to be parsed\n    * @param {Number|BigInt} baseMediaDecodeTime - base media decode time from tfdt\n        @see ISO-BMFF-12/2015, Section 8.8.12\n    * @param {Object} tfhd - The parsed Track Fragment Header\n    *   @see inspect.parseTfhd\n    * @return {Object[]} the parsed samples\n    *\n    * @see ISO-BMFF-12/2015, Section 8.8.8\n   **/\n\n\n  var parseSamples = function parseSamples(truns, baseMediaDecodeTime, tfhd) {\n    var currentDts = baseMediaDecodeTime;\n    var defaultSampleDuration = tfhd.defaultSampleDuration || 0;\n    var defaultSampleSize = tfhd.defaultSampleSize || 0;\n    var trackId = tfhd.trackId;\n    var allSamples = [];\n    truns.forEach(function (trun) {\n      // Note: We currently do not parse the sample table as well\n      // as the trun. It's possible some sources will require this.\n      // moov > trak > mdia > minf > stbl\n      var trackRun = parseTrun(trun);\n      var samples = trackRun.samples;\n      samples.forEach(function (sample) {\n        if (sample.duration === undefined) {\n          sample.duration = defaultSampleDuration;\n        }\n\n        if (sample.size === undefined) {\n          sample.size = defaultSampleSize;\n        }\n\n        sample.trackId = trackId;\n        sample.dts = currentDts;\n\n        if (sample.compositionTimeOffset === undefined) {\n          sample.compositionTimeOffset = 0;\n        }\n\n        if (typeof currentDts === 'bigint') {\n          sample.pts = currentDts + window_1.BigInt(sample.compositionTimeOffset);\n          currentDts += window_1.BigInt(sample.duration);\n        } else {\n          sample.pts = currentDts + sample.compositionTimeOffset;\n          currentDts += sample.duration;\n        }\n      });\n      allSamples = allSamples.concat(samples);\n    });\n    return allSamples;\n  };\n  /**\n    * Parses out caption nals from an FMP4 segment's video tracks.\n    *\n    * @param {Uint8Array} segment - The bytes of a single segment\n    * @param {Number} videoTrackId - The trackId of a video track in the segment\n    * @return {Object.<Number, Object[]>} A mapping of video trackId to\n    *   a list of seiNals found in that track\n   **/\n\n\n  var parseCaptionNals = function parseCaptionNals(segment, videoTrackId) {\n    // To get the samples\n    var trafs = findBox_1(segment, ['moof', 'traf']); // To get SEI NAL units\n\n    var mdats = findBox_1(segment, ['mdat']);\n    var captionNals = {};\n    var mdatTrafPairs = []; // Pair up each traf with a mdat as moofs and mdats are in pairs\n\n    mdats.forEach(function (mdat, index) {\n      var matchingTraf = trafs[index];\n      mdatTrafPairs.push({\n        mdat: mdat,\n        traf: matchingTraf\n      });\n    });\n    mdatTrafPairs.forEach(function (pair) {\n      var mdat = pair.mdat;\n      var traf = pair.traf;\n      var tfhd = findBox_1(traf, ['tfhd']); // Exactly 1 tfhd per traf\n\n      var headerInfo = parseTfhd(tfhd[0]);\n      var trackId = headerInfo.trackId;\n      var tfdt = findBox_1(traf, ['tfdt']); // Either 0 or 1 tfdt per traf\n\n      var baseMediaDecodeTime = tfdt.length > 0 ? parseTfdt(tfdt[0]).baseMediaDecodeTime : 0;\n      var truns = findBox_1(traf, ['trun']);\n      var samples;\n      var result; // Only parse video data for the chosen video track\n\n      if (videoTrackId === trackId && truns.length > 0) {\n        samples = parseSamples(truns, baseMediaDecodeTime, headerInfo);\n        result = findSeiNals(mdat, samples, trackId);\n\n        if (!captionNals[trackId]) {\n          captionNals[trackId] = {\n            seiNals: [],\n            logs: []\n          };\n        }\n\n        captionNals[trackId].seiNals = captionNals[trackId].seiNals.concat(result.seiNals);\n        captionNals[trackId].logs = captionNals[trackId].logs.concat(result.logs);\n      }\n    });\n    return captionNals;\n  };\n  /**\n    * Parses out inband captions from an MP4 container and returns\n    * caption objects that can be used by WebVTT and the TextTrack API.\n    * @see https://developer.mozilla.org/en-US/docs/Web/API/VTTCue\n    * @see https://developer.mozilla.org/en-US/docs/Web/API/TextTrack\n    * Assumes that `probe.getVideoTrackIds` and `probe.timescale` have been called first\n    *\n    * @param {Uint8Array} segment - The fmp4 segment containing embedded captions\n    * @param {Number} trackId - The id of the video track to parse\n    * @param {Number} timescale - The timescale for the video track from the init segment\n    *\n    * @return {?Object[]} parsedCaptions - A list of captions or null if no video tracks\n    * @return {Number} parsedCaptions[].startTime - The time to show the caption in seconds\n    * @return {Number} parsedCaptions[].endTime - The time to stop showing the caption in seconds\n    * @return {String} parsedCaptions[].text - The visible content of the caption\n   **/\n\n\n  var parseEmbeddedCaptions = function parseEmbeddedCaptions(segment, trackId, timescale) {\n    var captionNals; // the ISO-BMFF spec says that trackId can't be zero, but there's some broken content out there\n\n    if (trackId === null) {\n      return null;\n    }\n\n    captionNals = parseCaptionNals(segment, trackId);\n    var trackNals = captionNals[trackId] || {};\n    return {\n      seiNals: trackNals.seiNals,\n      logs: trackNals.logs,\n      timescale: timescale\n    };\n  };\n  /**\n    * Converts SEI NALUs into captions that can be used by video.js\n   **/\n\n\n  var CaptionParser = function CaptionParser() {\n    var isInitialized = false;\n    var captionStream; // Stores segments seen before trackId and timescale are set\n\n    var segmentCache; // Stores video track ID of the track being parsed\n\n    var trackId; // Stores the timescale of the track being parsed\n\n    var timescale; // Stores captions parsed so far\n\n    var parsedCaptions; // Stores whether we are receiving partial data or not\n\n    var parsingPartial;\n    /**\n      * A method to indicate whether a CaptionParser has been initalized\n      * @returns {Boolean}\n     **/\n\n    this.isInitialized = function () {\n      return isInitialized;\n    };\n    /**\n      * Initializes the underlying CaptionStream, SEI NAL parsing\n      * and management, and caption collection\n     **/\n\n\n    this.init = function (options) {\n      captionStream = new CaptionStream();\n      isInitialized = true;\n      parsingPartial = options ? options.isPartial : false; // Collect dispatched captions\n\n      captionStream.on('data', function (event) {\n        // Convert to seconds in the source's timescale\n        event.startTime = event.startPts / timescale;\n        event.endTime = event.endPts / timescale;\n        parsedCaptions.captions.push(event);\n        parsedCaptions.captionStreams[event.stream] = true;\n      });\n      captionStream.on('log', function (log) {\n        parsedCaptions.logs.push(log);\n      });\n    };\n    /**\n      * Determines if a new video track will be selected\n      * or if the timescale changed\n      * @return {Boolean}\n     **/\n\n\n    this.isNewInit = function (videoTrackIds, timescales) {\n      if (videoTrackIds && videoTrackIds.length === 0 || timescales && typeof timescales === 'object' && Object.keys(timescales).length === 0) {\n        return false;\n      }\n\n      return trackId !== videoTrackIds[0] || timescale !== timescales[trackId];\n    };\n    /**\n      * Parses out SEI captions and interacts with underlying\n      * CaptionStream to return dispatched captions\n      *\n      * @param {Uint8Array} segment - The fmp4 segment containing embedded captions\n      * @param {Number[]} videoTrackIds - A list of video tracks found in the init segment\n      * @param {Object.<Number, Number>} timescales - The timescales found in the init segment\n      * @see parseEmbeddedCaptions\n      * @see m2ts/caption-stream.js\n     **/\n\n\n    this.parse = function (segment, videoTrackIds, timescales) {\n      var parsedData;\n\n      if (!this.isInitialized()) {\n        return null; // This is not likely to be a video segment\n      } else if (!videoTrackIds || !timescales) {\n        return null;\n      } else if (this.isNewInit(videoTrackIds, timescales)) {\n        // Use the first video track only as there is no\n        // mechanism to switch to other video tracks\n        trackId = videoTrackIds[0];\n        timescale = timescales[trackId]; // If an init segment has not been seen yet, hold onto segment\n        // data until we have one.\n        // the ISO-BMFF spec says that trackId can't be zero, but there's some broken content out there\n      } else if (trackId === null || !timescale) {\n        segmentCache.push(segment);\n        return null;\n      } // Now that a timescale and trackId is set, parse cached segments\n\n\n      while (segmentCache.length > 0) {\n        var cachedSegment = segmentCache.shift();\n        this.parse(cachedSegment, videoTrackIds, timescales);\n      }\n\n      parsedData = parseEmbeddedCaptions(segment, trackId, timescale);\n\n      if (parsedData && parsedData.logs) {\n        parsedCaptions.logs = parsedCaptions.logs.concat(parsedData.logs);\n      }\n\n      if (parsedData === null || !parsedData.seiNals) {\n        if (parsedCaptions.logs.length) {\n          return {\n            logs: parsedCaptions.logs,\n            captions: [],\n            captionStreams: []\n          };\n        }\n\n        return null;\n      }\n\n      this.pushNals(parsedData.seiNals); // Force the parsed captions to be dispatched\n\n      this.flushStream();\n      return parsedCaptions;\n    };\n    /**\n      * Pushes SEI NALUs onto CaptionStream\n      * @param {Object[]} nals - A list of SEI nals parsed using `parseCaptionNals`\n      * Assumes that `parseCaptionNals` has been called first\n      * @see m2ts/caption-stream.js\n      **/\n\n\n    this.pushNals = function (nals) {\n      if (!this.isInitialized() || !nals || nals.length === 0) {\n        return null;\n      }\n\n      nals.forEach(function (nal) {\n        captionStream.push(nal);\n      });\n    };\n    /**\n      * Flushes underlying CaptionStream to dispatch processed, displayable captions\n      * @see m2ts/caption-stream.js\n     **/\n\n\n    this.flushStream = function () {\n      if (!this.isInitialized()) {\n        return null;\n      }\n\n      if (!parsingPartial) {\n        captionStream.flush();\n      } else {\n        captionStream.partialFlush();\n      }\n    };\n    /**\n      * Reset caption buckets for new data\n     **/\n\n\n    this.clearParsedCaptions = function () {\n      parsedCaptions.captions = [];\n      parsedCaptions.captionStreams = {};\n      parsedCaptions.logs = [];\n    };\n    /**\n      * Resets underlying CaptionStream\n      * @see m2ts/caption-stream.js\n     **/\n\n\n    this.resetCaptionStream = function () {\n      if (!this.isInitialized()) {\n        return null;\n      }\n\n      captionStream.reset();\n    };\n    /**\n      * Convenience method to clear all captions flushed from the\n      * CaptionStream and still being parsed\n      * @see m2ts/caption-stream.js\n     **/\n\n\n    this.clearAllCaptions = function () {\n      this.clearParsedCaptions();\n      this.resetCaptionStream();\n    };\n    /**\n      * Reset caption parser\n     **/\n\n\n    this.reset = function () {\n      segmentCache = [];\n      trackId = null;\n      timescale = null;\n\n      if (!parsedCaptions) {\n        parsedCaptions = {\n          captions: [],\n          // CC1, CC2, CC3, CC4\n          captionStreams: {},\n          logs: []\n        };\n      } else {\n        this.clearParsedCaptions();\n      }\n\n      this.resetCaptionStream();\n    };\n\n    this.reset();\n  };\n\n  var captionParser = CaptionParser;\n  var toUnsigned = bin.toUnsigned;\n  var toHexString = bin.toHexString;\n  var getUint64 = numbers.getUint64;\n  var timescale, startTime, compositionStartTime, getVideoTrackIds, getTracks, getTimescaleFromMediaHeader;\n  /**\n   * Parses an MP4 initialization segment and extracts the timescale\n   * values for any declared tracks. Timescale values indicate the\n   * number of clock ticks per second to assume for time-based values\n   * elsewhere in the MP4.\n   *\n   * To determine the start time of an MP4, you need two pieces of\n   * information: the timescale unit and the earliest base media decode\n   * time. Multiple timescales can be specified within an MP4 but the\n   * base media decode time is always expressed in the timescale from\n   * the media header box for the track:\n   * ```\n   * moov > trak > mdia > mdhd.timescale\n   * ```\n   * @param init {Uint8Array} the bytes of the init segment\n   * @return {object} a hash of track ids to timescale values or null if\n   * the init segment is malformed.\n   */\n\n  timescale = function timescale(init) {\n    var result = {},\n        traks = findBox_1(init, ['moov', 'trak']); // mdhd timescale\n\n    return traks.reduce(function (result, trak) {\n      var tkhd, version, index, id, mdhd;\n      tkhd = findBox_1(trak, ['tkhd'])[0];\n\n      if (!tkhd) {\n        return null;\n      }\n\n      version = tkhd[0];\n      index = version === 0 ? 12 : 20;\n      id = toUnsigned(tkhd[index] << 24 | tkhd[index + 1] << 16 | tkhd[index + 2] << 8 | tkhd[index + 3]);\n      mdhd = findBox_1(trak, ['mdia', 'mdhd'])[0];\n\n      if (!mdhd) {\n        return null;\n      }\n\n      version = mdhd[0];\n      index = version === 0 ? 12 : 20;\n      result[id] = toUnsigned(mdhd[index] << 24 | mdhd[index + 1] << 16 | mdhd[index + 2] << 8 | mdhd[index + 3]);\n      return result;\n    }, result);\n  };\n  /**\n   * Determine the base media decode start time, in seconds, for an MP4\n   * fragment. If multiple fragments are specified, the earliest time is\n   * returned.\n   *\n   * The base media decode time can be parsed from track fragment\n   * metadata:\n   * ```\n   * moof > traf > tfdt.baseMediaDecodeTime\n   * ```\n   * It requires the timescale value from the mdhd to interpret.\n   *\n   * @param timescale {object} a hash of track ids to timescale values.\n   * @return {number} the earliest base media decode start time for the\n   * fragment, in seconds\n   */\n\n\n  startTime = function startTime(timescale, fragment) {\n    var trafs; // we need info from two childrend of each track fragment box\n\n    trafs = findBox_1(fragment, ['moof', 'traf']); // determine the start times for each track\n\n    var lowestTime = trafs.reduce(function (acc, traf) {\n      var tfhd = findBox_1(traf, ['tfhd'])[0]; // get the track id from the tfhd\n\n      var id = toUnsigned(tfhd[4] << 24 | tfhd[5] << 16 | tfhd[6] << 8 | tfhd[7]); // assume a 90kHz clock if no timescale was specified\n\n      var scale = timescale[id] || 90e3; // get the base media decode time from the tfdt\n\n      var tfdt = findBox_1(traf, ['tfdt'])[0];\n      var dv = new DataView(tfdt.buffer, tfdt.byteOffset, tfdt.byteLength);\n      var baseTime; // version 1 is 64 bit\n\n      if (tfdt[0] === 1) {\n        baseTime = getUint64(tfdt.subarray(4, 12));\n      } else {\n        baseTime = dv.getUint32(4);\n      } // convert base time to seconds if it is a valid number.\n\n\n      var seconds;\n\n      if (typeof baseTime === 'bigint') {\n        seconds = baseTime / window_1.BigInt(scale);\n      } else if (typeof baseTime === 'number' && !isNaN(baseTime)) {\n        seconds = baseTime / scale;\n      }\n\n      if (seconds < Number.MAX_SAFE_INTEGER) {\n        seconds = Number(seconds);\n      }\n\n      if (seconds < acc) {\n        acc = seconds;\n      }\n\n      return acc;\n    }, Infinity);\n    return typeof lowestTime === 'bigint' || isFinite(lowestTime) ? lowestTime : 0;\n  };\n  /**\n   * Determine the composition start, in seconds, for an MP4\n   * fragment.\n   *\n   * The composition start time of a fragment can be calculated using the base\n   * media decode time, composition time offset, and timescale, as follows:\n   *\n   * compositionStartTime = (baseMediaDecodeTime + compositionTimeOffset) / timescale\n   *\n   * All of the aforementioned information is contained within a media fragment's\n   * `traf` box, except for timescale info, which comes from the initialization\n   * segment, so a track id (also contained within a `traf`) is also necessary to\n   * associate it with a timescale\n   *\n   *\n   * @param timescales {object} - a hash of track ids to timescale values.\n   * @param fragment {Unit8Array} - the bytes of a media segment\n   * @return {number} the composition start time for the fragment, in seconds\n   **/\n\n\n  compositionStartTime = function compositionStartTime(timescales, fragment) {\n    var trafBoxes = findBox_1(fragment, ['moof', 'traf']);\n    var baseMediaDecodeTime = 0;\n    var compositionTimeOffset = 0;\n    var trackId;\n\n    if (trafBoxes && trafBoxes.length) {\n      // The spec states that track run samples contained within a `traf` box are contiguous, but\n      // it does not explicitly state whether the `traf` boxes themselves are contiguous.\n      // We will assume that they are, so we only need the first to calculate start time.\n      var tfhd = findBox_1(trafBoxes[0], ['tfhd'])[0];\n      var trun = findBox_1(trafBoxes[0], ['trun'])[0];\n      var tfdt = findBox_1(trafBoxes[0], ['tfdt'])[0];\n\n      if (tfhd) {\n        var parsedTfhd = parseTfhd(tfhd);\n        trackId = parsedTfhd.trackId;\n      }\n\n      if (tfdt) {\n        var parsedTfdt = parseTfdt(tfdt);\n        baseMediaDecodeTime = parsedTfdt.baseMediaDecodeTime;\n      }\n\n      if (trun) {\n        var parsedTrun = parseTrun(trun);\n\n        if (parsedTrun.samples && parsedTrun.samples.length) {\n          compositionTimeOffset = parsedTrun.samples[0].compositionTimeOffset || 0;\n        }\n      }\n    } // Get timescale for this specific track. Assume a 90kHz clock if no timescale was\n    // specified.\n\n\n    var timescale = timescales[trackId] || 90e3; // return the composition start time, in seconds\n\n    if (typeof baseMediaDecodeTime === 'bigint') {\n      compositionTimeOffset = window_1.BigInt(compositionTimeOffset);\n      timescale = window_1.BigInt(timescale);\n    }\n\n    var result = (baseMediaDecodeTime + compositionTimeOffset) / timescale;\n\n    if (typeof result === 'bigint' && result < Number.MAX_SAFE_INTEGER) {\n      result = Number(result);\n    }\n\n    return result;\n  };\n  /**\n    * Find the trackIds of the video tracks in this source.\n    * Found by parsing the Handler Reference and Track Header Boxes:\n    *   moov > trak > mdia > hdlr\n    *   moov > trak > tkhd\n    *\n    * @param {Uint8Array} init - The bytes of the init segment for this source\n    * @return {Number[]} A list of trackIds\n    *\n    * @see ISO-BMFF-12/2015, Section 8.4.3\n   **/\n\n\n  getVideoTrackIds = function getVideoTrackIds(init) {\n    var traks = findBox_1(init, ['moov', 'trak']);\n    var videoTrackIds = [];\n    traks.forEach(function (trak) {\n      var hdlrs = findBox_1(trak, ['mdia', 'hdlr']);\n      var tkhds = findBox_1(trak, ['tkhd']);\n      hdlrs.forEach(function (hdlr, index) {\n        var handlerType = parseType_1(hdlr.subarray(8, 12));\n        var tkhd = tkhds[index];\n        var view;\n        var version;\n        var trackId;\n\n        if (handlerType === 'vide') {\n          view = new DataView(tkhd.buffer, tkhd.byteOffset, tkhd.byteLength);\n          version = view.getUint8(0);\n          trackId = version === 0 ? view.getUint32(12) : view.getUint32(20);\n          videoTrackIds.push(trackId);\n        }\n      });\n    });\n    return videoTrackIds;\n  };\n\n  getTimescaleFromMediaHeader = function getTimescaleFromMediaHeader(mdhd) {\n    // mdhd is a FullBox, meaning it will have its own version as the first byte\n    var version = mdhd[0];\n    var index = version === 0 ? 12 : 20;\n    return toUnsigned(mdhd[index] << 24 | mdhd[index + 1] << 16 | mdhd[index + 2] << 8 | mdhd[index + 3]);\n  };\n  /**\n   * Get all the video, audio, and hint tracks from a non fragmented\n   * mp4 segment\n   */\n\n\n  getTracks = function getTracks(init) {\n    var traks = findBox_1(init, ['moov', 'trak']);\n    var tracks = [];\n    traks.forEach(function (trak) {\n      var track = {};\n      var tkhd = findBox_1(trak, ['tkhd'])[0];\n      var view, tkhdVersion; // id\n\n      if (tkhd) {\n        view = new DataView(tkhd.buffer, tkhd.byteOffset, tkhd.byteLength);\n        tkhdVersion = view.getUint8(0);\n        track.id = tkhdVersion === 0 ? view.getUint32(12) : view.getUint32(20);\n      }\n\n      var hdlr = findBox_1(trak, ['mdia', 'hdlr'])[0]; // type\n\n      if (hdlr) {\n        var type = parseType_1(hdlr.subarray(8, 12));\n\n        if (type === 'vide') {\n          track.type = 'video';\n        } else if (type === 'soun') {\n          track.type = 'audio';\n        } else {\n          track.type = type;\n        }\n      } // codec\n\n\n      var stsd = findBox_1(trak, ['mdia', 'minf', 'stbl', 'stsd'])[0];\n\n      if (stsd) {\n        var sampleDescriptions = stsd.subarray(8); // gives the codec type string\n\n        track.codec = parseType_1(sampleDescriptions.subarray(4, 8));\n        var codecBox = findBox_1(sampleDescriptions, [track.codec])[0];\n        var codecConfig, codecConfigType;\n\n        if (codecBox) {\n          // https://tools.ietf.org/html/rfc6381#section-3.3\n          if (/^[asm]vc[1-9]$/i.test(track.codec)) {\n            // we don't need anything but the \"config\" parameter of the\n            // avc1 codecBox\n            codecConfig = codecBox.subarray(78);\n            codecConfigType = parseType_1(codecConfig.subarray(4, 8));\n\n            if (codecConfigType === 'avcC' && codecConfig.length > 11) {\n              track.codec += '.'; // left padded with zeroes for single digit hex\n              // profile idc\n\n              track.codec += toHexString(codecConfig[9]); // the byte containing the constraint_set flags\n\n              track.codec += toHexString(codecConfig[10]); // level idc\n\n              track.codec += toHexString(codecConfig[11]);\n            } else {\n              // TODO: show a warning that we couldn't parse the codec\n              // and are using the default\n              track.codec = 'avc1.4d400d';\n            }\n          } else if (/^mp4[a,v]$/i.test(track.codec)) {\n            // we do not need anything but the streamDescriptor of the mp4a codecBox\n            codecConfig = codecBox.subarray(28);\n            codecConfigType = parseType_1(codecConfig.subarray(4, 8));\n\n            if (codecConfigType === 'esds' && codecConfig.length > 20 && codecConfig[19] !== 0) {\n              track.codec += '.' + toHexString(codecConfig[19]); // this value is only a single digit\n\n              track.codec += '.' + toHexString(codecConfig[20] >>> 2 & 0x3f).replace(/^0/, '');\n            } else {\n              // TODO: show a warning that we couldn't parse the codec\n              // and are using the default\n              track.codec = 'mp4a.40.2';\n            }\n          } else {\n            // flac, opus, etc\n            track.codec = track.codec.toLowerCase();\n          }\n        }\n      }\n\n      var mdhd = findBox_1(trak, ['mdia', 'mdhd'])[0];\n\n      if (mdhd) {\n        track.timescale = getTimescaleFromMediaHeader(mdhd);\n      }\n\n      tracks.push(track);\n    });\n    return tracks;\n  };\n\n  var probe$2 = {\n    // export mp4 inspector's findBox and parseType for backwards compatibility\n    findBox: findBox_1,\n    parseType: parseType_1,\n    timescale: timescale,\n    startTime: startTime,\n    compositionStartTime: compositionStartTime,\n    videoTrackIds: getVideoTrackIds,\n    tracks: getTracks,\n    getTimescaleFromMediaHeader: getTimescaleFromMediaHeader\n  };\n\n  var parsePid = function parsePid(packet) {\n    var pid = packet[1] & 0x1f;\n    pid <<= 8;\n    pid |= packet[2];\n    return pid;\n  };\n\n  var parsePayloadUnitStartIndicator = function parsePayloadUnitStartIndicator(packet) {\n    return !!(packet[1] & 0x40);\n  };\n\n  var parseAdaptionField = function parseAdaptionField(packet) {\n    var offset = 0; // if an adaption field is present, its length is specified by the\n    // fifth byte of the TS packet header. The adaptation field is\n    // used to add stuffing to PES packets that don't fill a complete\n    // TS packet, and to specify some forms of timing and control data\n    // that we do not currently use.\n\n    if ((packet[3] & 0x30) >>> 4 > 0x01) {\n      offset += packet[4] + 1;\n    }\n\n    return offset;\n  };\n\n  var parseType = function parseType(packet, pmtPid) {\n    var pid = parsePid(packet);\n\n    if (pid === 0) {\n      return 'pat';\n    } else if (pid === pmtPid) {\n      return 'pmt';\n    } else if (pmtPid) {\n      return 'pes';\n    }\n\n    return null;\n  };\n\n  var parsePat = function parsePat(packet) {\n    var pusi = parsePayloadUnitStartIndicator(packet);\n    var offset = 4 + parseAdaptionField(packet);\n\n    if (pusi) {\n      offset += packet[offset] + 1;\n    }\n\n    return (packet[offset + 10] & 0x1f) << 8 | packet[offset + 11];\n  };\n\n  var parsePmt = function parsePmt(packet) {\n    var programMapTable = {};\n    var pusi = parsePayloadUnitStartIndicator(packet);\n    var payloadOffset = 4 + parseAdaptionField(packet);\n\n    if (pusi) {\n      payloadOffset += packet[payloadOffset] + 1;\n    } // PMTs can be sent ahead of the time when they should actually\n    // take effect. We don't believe this should ever be the case\n    // for HLS but we'll ignore \"forward\" PMT declarations if we see\n    // them. Future PMT declarations have the current_next_indicator\n    // set to zero.\n\n\n    if (!(packet[payloadOffset + 5] & 0x01)) {\n      return;\n    }\n\n    var sectionLength, tableEnd, programInfoLength; // the mapping table ends at the end of the current section\n\n    sectionLength = (packet[payloadOffset + 1] & 0x0f) << 8 | packet[payloadOffset + 2];\n    tableEnd = 3 + sectionLength - 4; // to determine where the table is, we have to figure out how\n    // long the program info descriptors are\n\n    programInfoLength = (packet[payloadOffset + 10] & 0x0f) << 8 | packet[payloadOffset + 11]; // advance the offset to the first entry in the mapping table\n\n    var offset = 12 + programInfoLength;\n\n    while (offset < tableEnd) {\n      var i = payloadOffset + offset; // add an entry that maps the elementary_pid to the stream_type\n\n      programMapTable[(packet[i + 1] & 0x1F) << 8 | packet[i + 2]] = packet[i]; // move to the next table entry\n      // skip past the elementary stream descriptors, if present\n\n      offset += ((packet[i + 3] & 0x0F) << 8 | packet[i + 4]) + 5;\n    }\n\n    return programMapTable;\n  };\n\n  var parsePesType = function parsePesType(packet, programMapTable) {\n    var pid = parsePid(packet);\n    var type = programMapTable[pid];\n\n    switch (type) {\n      case streamTypes.H264_STREAM_TYPE:\n        return 'video';\n\n      case streamTypes.ADTS_STREAM_TYPE:\n        return 'audio';\n\n      case streamTypes.METADATA_STREAM_TYPE:\n        return 'timed-metadata';\n\n      default:\n        return null;\n    }\n  };\n\n  var parsePesTime = function parsePesTime(packet) {\n    var pusi = parsePayloadUnitStartIndicator(packet);\n\n    if (!pusi) {\n      return null;\n    }\n\n    var offset = 4 + parseAdaptionField(packet);\n\n    if (offset >= packet.byteLength) {\n      // From the H 222.0 MPEG-TS spec\n      // \"For transport stream packets carrying PES packets, stuffing is needed when there\n      //  is insufficient PES packet data to completely fill the transport stream packet\n      //  payload bytes. Stuffing is accomplished by defining an adaptation field longer than\n      //  the sum of the lengths of the data elements in it, so that the payload bytes\n      //  remaining after the adaptation field exactly accommodates the available PES packet\n      //  data.\"\n      //\n      // If the offset is >= the length of the packet, then the packet contains no data\n      // and instead is just adaption field stuffing bytes\n      return null;\n    }\n\n    var pes = null;\n    var ptsDtsFlags; // PES packets may be annotated with a PTS value, or a PTS value\n    // and a DTS value. Determine what combination of values is\n    // available to work with.\n\n    ptsDtsFlags = packet[offset + 7]; // PTS and DTS are normally stored as a 33-bit number.  Javascript\n    // performs all bitwise operations on 32-bit integers but javascript\n    // supports a much greater range (52-bits) of integer using standard\n    // mathematical operations.\n    // We construct a 31-bit value using bitwise operators over the 31\n    // most significant bits and then multiply by 4 (equal to a left-shift\n    // of 2) before we add the final 2 least significant bits of the\n    // timestamp (equal to an OR.)\n\n    if (ptsDtsFlags & 0xC0) {\n      pes = {}; // the PTS and DTS are not written out directly. For information\n      // on how they are encoded, see\n      // http://dvd.sourceforge.net/dvdinfo/pes-hdr.html\n\n      pes.pts = (packet[offset + 9] & 0x0E) << 27 | (packet[offset + 10] & 0xFF) << 20 | (packet[offset + 11] & 0xFE) << 12 | (packet[offset + 12] & 0xFF) << 5 | (packet[offset + 13] & 0xFE) >>> 3;\n      pes.pts *= 4; // Left shift by 2\n\n      pes.pts += (packet[offset + 13] & 0x06) >>> 1; // OR by the two LSBs\n\n      pes.dts = pes.pts;\n\n      if (ptsDtsFlags & 0x40) {\n        pes.dts = (packet[offset + 14] & 0x0E) << 27 | (packet[offset + 15] & 0xFF) << 20 | (packet[offset + 16] & 0xFE) << 12 | (packet[offset + 17] & 0xFF) << 5 | (packet[offset + 18] & 0xFE) >>> 3;\n        pes.dts *= 4; // Left shift by 2\n\n        pes.dts += (packet[offset + 18] & 0x06) >>> 1; // OR by the two LSBs\n      }\n    }\n\n    return pes;\n  };\n\n  var parseNalUnitType = function parseNalUnitType(type) {\n    switch (type) {\n      case 0x05:\n        return 'slice_layer_without_partitioning_rbsp_idr';\n\n      case 0x06:\n        return 'sei_rbsp';\n\n      case 0x07:\n        return 'seq_parameter_set_rbsp';\n\n      case 0x08:\n        return 'pic_parameter_set_rbsp';\n\n      case 0x09:\n        return 'access_unit_delimiter_rbsp';\n\n      default:\n        return null;\n    }\n  };\n\n  var videoPacketContainsKeyFrame = function videoPacketContainsKeyFrame(packet) {\n    var offset = 4 + parseAdaptionField(packet);\n    var frameBuffer = packet.subarray(offset);\n    var frameI = 0;\n    var frameSyncPoint = 0;\n    var foundKeyFrame = false;\n    var nalType; // advance the sync point to a NAL start, if necessary\n\n    for (; frameSyncPoint < frameBuffer.byteLength - 3; frameSyncPoint++) {\n      if (frameBuffer[frameSyncPoint + 2] === 1) {\n        // the sync point is properly aligned\n        frameI = frameSyncPoint + 5;\n        break;\n      }\n    }\n\n    while (frameI < frameBuffer.byteLength) {\n      // look at the current byte to determine if we've hit the end of\n      // a NAL unit boundary\n      switch (frameBuffer[frameI]) {\n        case 0:\n          // skip past non-sync sequences\n          if (frameBuffer[frameI - 1] !== 0) {\n            frameI += 2;\n            break;\n          } else if (frameBuffer[frameI - 2] !== 0) {\n            frameI++;\n            break;\n          }\n\n          if (frameSyncPoint + 3 !== frameI - 2) {\n            nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f);\n\n            if (nalType === 'slice_layer_without_partitioning_rbsp_idr') {\n              foundKeyFrame = true;\n            }\n          } // drop trailing zeroes\n\n\n          do {\n            frameI++;\n          } while (frameBuffer[frameI] !== 1 && frameI < frameBuffer.length);\n\n          frameSyncPoint = frameI - 2;\n          frameI += 3;\n          break;\n\n        case 1:\n          // skip past non-sync sequences\n          if (frameBuffer[frameI - 1] !== 0 || frameBuffer[frameI - 2] !== 0) {\n            frameI += 3;\n            break;\n          }\n\n          nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f);\n\n          if (nalType === 'slice_layer_without_partitioning_rbsp_idr') {\n            foundKeyFrame = true;\n          }\n\n          frameSyncPoint = frameI - 2;\n          frameI += 3;\n          break;\n\n        default:\n          // the current byte isn't a one or zero, so it cannot be part\n          // of a sync sequence\n          frameI += 3;\n          break;\n      }\n    }\n\n    frameBuffer = frameBuffer.subarray(frameSyncPoint);\n    frameI -= frameSyncPoint;\n    frameSyncPoint = 0; // parse the final nal\n\n    if (frameBuffer && frameBuffer.byteLength > 3) {\n      nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f);\n\n      if (nalType === 'slice_layer_without_partitioning_rbsp_idr') {\n        foundKeyFrame = true;\n      }\n    }\n\n    return foundKeyFrame;\n  };\n\n  var probe$1 = {\n    parseType: parseType,\n    parsePat: parsePat,\n    parsePmt: parsePmt,\n    parsePayloadUnitStartIndicator: parsePayloadUnitStartIndicator,\n    parsePesType: parsePesType,\n    parsePesTime: parsePesTime,\n    videoPacketContainsKeyFrame: videoPacketContainsKeyFrame\n  };\n  var handleRollover = timestampRolloverStream.handleRollover;\n  var probe = {};\n  probe.ts = probe$1;\n  probe.aac = utils;\n  var ONE_SECOND_IN_TS = clock.ONE_SECOND_IN_TS;\n  var MP2T_PACKET_LENGTH = 188,\n      // bytes\n  SYNC_BYTE = 0x47;\n  /**\n   * walks through segment data looking for pat and pmt packets to parse out\n   * program map table information\n   */\n\n  var parsePsi_ = function parsePsi_(bytes, pmt) {\n    var startIndex = 0,\n        endIndex = MP2T_PACKET_LENGTH,\n        packet,\n        type;\n\n    while (endIndex < bytes.byteLength) {\n      // Look for a pair of start and end sync bytes in the data..\n      if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) {\n        // We found a packet\n        packet = bytes.subarray(startIndex, endIndex);\n        type = probe.ts.parseType(packet, pmt.pid);\n\n        switch (type) {\n          case 'pat':\n            pmt.pid = probe.ts.parsePat(packet);\n            break;\n\n          case 'pmt':\n            var table = probe.ts.parsePmt(packet);\n            pmt.table = pmt.table || {};\n            Object.keys(table).forEach(function (key) {\n              pmt.table[key] = table[key];\n            });\n            break;\n        }\n\n        startIndex += MP2T_PACKET_LENGTH;\n        endIndex += MP2T_PACKET_LENGTH;\n        continue;\n      } // If we get here, we have somehow become de-synchronized and we need to step\n      // forward one byte at a time until we find a pair of sync bytes that denote\n      // a packet\n\n\n      startIndex++;\n      endIndex++;\n    }\n  };\n  /**\n   * walks through the segment data from the start and end to get timing information\n   * for the first and last audio pes packets\n   */\n\n\n  var parseAudioPes_ = function parseAudioPes_(bytes, pmt, result) {\n    var startIndex = 0,\n        endIndex = MP2T_PACKET_LENGTH,\n        packet,\n        type,\n        pesType,\n        pusi,\n        parsed;\n    var endLoop = false; // Start walking from start of segment to get first audio packet\n\n    while (endIndex <= bytes.byteLength) {\n      // Look for a pair of start and end sync bytes in the data..\n      if (bytes[startIndex] === SYNC_BYTE && (bytes[endIndex] === SYNC_BYTE || endIndex === bytes.byteLength)) {\n        // We found a packet\n        packet = bytes.subarray(startIndex, endIndex);\n        type = probe.ts.parseType(packet, pmt.pid);\n\n        switch (type) {\n          case 'pes':\n            pesType = probe.ts.parsePesType(packet, pmt.table);\n            pusi = probe.ts.parsePayloadUnitStartIndicator(packet);\n\n            if (pesType === 'audio' && pusi) {\n              parsed = probe.ts.parsePesTime(packet);\n\n              if (parsed) {\n                parsed.type = 'audio';\n                result.audio.push(parsed);\n                endLoop = true;\n              }\n            }\n\n            break;\n        }\n\n        if (endLoop) {\n          break;\n        }\n\n        startIndex += MP2T_PACKET_LENGTH;\n        endIndex += MP2T_PACKET_LENGTH;\n        continue;\n      } // If we get here, we have somehow become de-synchronized and we need to step\n      // forward one byte at a time until we find a pair of sync bytes that denote\n      // a packet\n\n\n      startIndex++;\n      endIndex++;\n    } // Start walking from end of segment to get last audio packet\n\n\n    endIndex = bytes.byteLength;\n    startIndex = endIndex - MP2T_PACKET_LENGTH;\n    endLoop = false;\n\n    while (startIndex >= 0) {\n      // Look for a pair of start and end sync bytes in the data..\n      if (bytes[startIndex] === SYNC_BYTE && (bytes[endIndex] === SYNC_BYTE || endIndex === bytes.byteLength)) {\n        // We found a packet\n        packet = bytes.subarray(startIndex, endIndex);\n        type = probe.ts.parseType(packet, pmt.pid);\n\n        switch (type) {\n          case 'pes':\n            pesType = probe.ts.parsePesType(packet, pmt.table);\n            pusi = probe.ts.parsePayloadUnitStartIndicator(packet);\n\n            if (pesType === 'audio' && pusi) {\n              parsed = probe.ts.parsePesTime(packet);\n\n              if (parsed) {\n                parsed.type = 'audio';\n                result.audio.push(parsed);\n                endLoop = true;\n              }\n            }\n\n            break;\n        }\n\n        if (endLoop) {\n          break;\n        }\n\n        startIndex -= MP2T_PACKET_LENGTH;\n        endIndex -= MP2T_PACKET_LENGTH;\n        continue;\n      } // If we get here, we have somehow become de-synchronized and we need to step\n      // forward one byte at a time until we find a pair of sync bytes that denote\n      // a packet\n\n\n      startIndex--;\n      endIndex--;\n    }\n  };\n  /**\n   * walks through the segment data from the start and end to get timing information\n   * for the first and last video pes packets as well as timing information for the first\n   * key frame.\n   */\n\n\n  var parseVideoPes_ = function parseVideoPes_(bytes, pmt, result) {\n    var startIndex = 0,\n        endIndex = MP2T_PACKET_LENGTH,\n        packet,\n        type,\n        pesType,\n        pusi,\n        parsed,\n        frame,\n        i,\n        pes;\n    var endLoop = false;\n    var currentFrame = {\n      data: [],\n      size: 0\n    }; // Start walking from start of segment to get first video packet\n\n    while (endIndex < bytes.byteLength) {\n      // Look for a pair of start and end sync bytes in the data..\n      if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) {\n        // We found a packet\n        packet = bytes.subarray(startIndex, endIndex);\n        type = probe.ts.parseType(packet, pmt.pid);\n\n        switch (type) {\n          case 'pes':\n            pesType = probe.ts.parsePesType(packet, pmt.table);\n            pusi = probe.ts.parsePayloadUnitStartIndicator(packet);\n\n            if (pesType === 'video') {\n              if (pusi && !endLoop) {\n                parsed = probe.ts.parsePesTime(packet);\n\n                if (parsed) {\n                  parsed.type = 'video';\n                  result.video.push(parsed);\n                  endLoop = true;\n                }\n              }\n\n              if (!result.firstKeyFrame) {\n                if (pusi) {\n                  if (currentFrame.size !== 0) {\n                    frame = new Uint8Array(currentFrame.size);\n                    i = 0;\n\n                    while (currentFrame.data.length) {\n                      pes = currentFrame.data.shift();\n                      frame.set(pes, i);\n                      i += pes.byteLength;\n                    }\n\n                    if (probe.ts.videoPacketContainsKeyFrame(frame)) {\n                      var firstKeyFrame = probe.ts.parsePesTime(frame); // PTS/DTS may not be available. Simply *not* setting\n                      // the keyframe seems to work fine with HLS playback\n                      // and definitely preferable to a crash with TypeError...\n\n                      if (firstKeyFrame) {\n                        result.firstKeyFrame = firstKeyFrame;\n                        result.firstKeyFrame.type = 'video';\n                      } else {\n                        // eslint-disable-next-line\n                        console.warn('Failed to extract PTS/DTS from PES at first keyframe. ' + 'This could be an unusual TS segment, or else mux.js did not ' + 'parse your TS segment correctly. If you know your TS ' + 'segments do contain PTS/DTS on keyframes please file a bug ' + 'report! You can try ffprobe to double check for yourself.');\n                      }\n                    }\n\n                    currentFrame.size = 0;\n                  }\n                }\n\n                currentFrame.data.push(packet);\n                currentFrame.size += packet.byteLength;\n              }\n            }\n\n            break;\n        }\n\n        if (endLoop && result.firstKeyFrame) {\n          break;\n        }\n\n        startIndex += MP2T_PACKET_LENGTH;\n        endIndex += MP2T_PACKET_LENGTH;\n        continue;\n      } // If we get here, we have somehow become de-synchronized and we need to step\n      // forward one byte at a time until we find a pair of sync bytes that denote\n      // a packet\n\n\n      startIndex++;\n      endIndex++;\n    } // Start walking from end of segment to get last video packet\n\n\n    endIndex = bytes.byteLength;\n    startIndex = endIndex - MP2T_PACKET_LENGTH;\n    endLoop = false;\n\n    while (startIndex >= 0) {\n      // Look for a pair of start and end sync bytes in the data..\n      if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) {\n        // We found a packet\n        packet = bytes.subarray(startIndex, endIndex);\n        type = probe.ts.parseType(packet, pmt.pid);\n\n        switch (type) {\n          case 'pes':\n            pesType = probe.ts.parsePesType(packet, pmt.table);\n            pusi = probe.ts.parsePayloadUnitStartIndicator(packet);\n\n            if (pesType === 'video' && pusi) {\n              parsed = probe.ts.parsePesTime(packet);\n\n              if (parsed) {\n                parsed.type = 'video';\n                result.video.push(parsed);\n                endLoop = true;\n              }\n            }\n\n            break;\n        }\n\n        if (endLoop) {\n          break;\n        }\n\n        startIndex -= MP2T_PACKET_LENGTH;\n        endIndex -= MP2T_PACKET_LENGTH;\n        continue;\n      } // If we get here, we have somehow become de-synchronized and we need to step\n      // forward one byte at a time until we find a pair of sync bytes that denote\n      // a packet\n\n\n      startIndex--;\n      endIndex--;\n    }\n  };\n  /**\n   * Adjusts the timestamp information for the segment to account for\n   * rollover and convert to seconds based on pes packet timescale (90khz clock)\n   */\n\n\n  var adjustTimestamp_ = function adjustTimestamp_(segmentInfo, baseTimestamp) {\n    if (segmentInfo.audio && segmentInfo.audio.length) {\n      var audioBaseTimestamp = baseTimestamp;\n\n      if (typeof audioBaseTimestamp === 'undefined' || isNaN(audioBaseTimestamp)) {\n        audioBaseTimestamp = segmentInfo.audio[0].dts;\n      }\n\n      segmentInfo.audio.forEach(function (info) {\n        info.dts = handleRollover(info.dts, audioBaseTimestamp);\n        info.pts = handleRollover(info.pts, audioBaseTimestamp); // time in seconds\n\n        info.dtsTime = info.dts / ONE_SECOND_IN_TS;\n        info.ptsTime = info.pts / ONE_SECOND_IN_TS;\n      });\n    }\n\n    if (segmentInfo.video && segmentInfo.video.length) {\n      var videoBaseTimestamp = baseTimestamp;\n\n      if (typeof videoBaseTimestamp === 'undefined' || isNaN(videoBaseTimestamp)) {\n        videoBaseTimestamp = segmentInfo.video[0].dts;\n      }\n\n      segmentInfo.video.forEach(function (info) {\n        info.dts = handleRollover(info.dts, videoBaseTimestamp);\n        info.pts = handleRollover(info.pts, videoBaseTimestamp); // time in seconds\n\n        info.dtsTime = info.dts / ONE_SECOND_IN_TS;\n        info.ptsTime = info.pts / ONE_SECOND_IN_TS;\n      });\n\n      if (segmentInfo.firstKeyFrame) {\n        var frame = segmentInfo.firstKeyFrame;\n        frame.dts = handleRollover(frame.dts, videoBaseTimestamp);\n        frame.pts = handleRollover(frame.pts, videoBaseTimestamp); // time in seconds\n\n        frame.dtsTime = frame.dts / ONE_SECOND_IN_TS;\n        frame.ptsTime = frame.pts / ONE_SECOND_IN_TS;\n      }\n    }\n  };\n  /**\n   * inspects the aac data stream for start and end time information\n   */\n\n\n  var inspectAac_ = function inspectAac_(bytes) {\n    var endLoop = false,\n        audioCount = 0,\n        sampleRate = null,\n        timestamp = null,\n        frameSize = 0,\n        byteIndex = 0,\n        packet;\n\n    while (bytes.length - byteIndex >= 3) {\n      var type = probe.aac.parseType(bytes, byteIndex);\n\n      switch (type) {\n        case 'timed-metadata':\n          // Exit early because we don't have enough to parse\n          // the ID3 tag header\n          if (bytes.length - byteIndex < 10) {\n            endLoop = true;\n            break;\n          }\n\n          frameSize = probe.aac.parseId3TagSize(bytes, byteIndex); // Exit early if we don't have enough in the buffer\n          // to emit a full packet\n\n          if (frameSize > bytes.length) {\n            endLoop = true;\n            break;\n          }\n\n          if (timestamp === null) {\n            packet = bytes.subarray(byteIndex, byteIndex + frameSize);\n            timestamp = probe.aac.parseAacTimestamp(packet);\n          }\n\n          byteIndex += frameSize;\n          break;\n\n        case 'audio':\n          // Exit early because we don't have enough to parse\n          // the ADTS frame header\n          if (bytes.length - byteIndex < 7) {\n            endLoop = true;\n            break;\n          }\n\n          frameSize = probe.aac.parseAdtsSize(bytes, byteIndex); // Exit early if we don't have enough in the buffer\n          // to emit a full packet\n\n          if (frameSize > bytes.length) {\n            endLoop = true;\n            break;\n          }\n\n          if (sampleRate === null) {\n            packet = bytes.subarray(byteIndex, byteIndex + frameSize);\n            sampleRate = probe.aac.parseSampleRate(packet);\n          }\n\n          audioCount++;\n          byteIndex += frameSize;\n          break;\n\n        default:\n          byteIndex++;\n          break;\n      }\n\n      if (endLoop) {\n        return null;\n      }\n    }\n\n    if (sampleRate === null || timestamp === null) {\n      return null;\n    }\n\n    var audioTimescale = ONE_SECOND_IN_TS / sampleRate;\n    var result = {\n      audio: [{\n        type: 'audio',\n        dts: timestamp,\n        pts: timestamp\n      }, {\n        type: 'audio',\n        dts: timestamp + audioCount * 1024 * audioTimescale,\n        pts: timestamp + audioCount * 1024 * audioTimescale\n      }]\n    };\n    return result;\n  };\n  /**\n   * inspects the transport stream segment data for start and end time information\n   * of the audio and video tracks (when present) as well as the first key frame's\n   * start time.\n   */\n\n\n  var inspectTs_ = function inspectTs_(bytes) {\n    var pmt = {\n      pid: null,\n      table: null\n    };\n    var result = {};\n    parsePsi_(bytes, pmt);\n\n    for (var pid in pmt.table) {\n      if (pmt.table.hasOwnProperty(pid)) {\n        var type = pmt.table[pid];\n\n        switch (type) {\n          case streamTypes.H264_STREAM_TYPE:\n            result.video = [];\n            parseVideoPes_(bytes, pmt, result);\n\n            if (result.video.length === 0) {\n              delete result.video;\n            }\n\n            break;\n\n          case streamTypes.ADTS_STREAM_TYPE:\n            result.audio = [];\n            parseAudioPes_(bytes, pmt, result);\n\n            if (result.audio.length === 0) {\n              delete result.audio;\n            }\n\n            break;\n        }\n      }\n    }\n\n    return result;\n  };\n  /**\n   * Inspects segment byte data and returns an object with start and end timing information\n   *\n   * @param {Uint8Array} bytes The segment byte data\n   * @param {Number} baseTimestamp Relative reference timestamp used when adjusting frame\n   *  timestamps for rollover. This value must be in 90khz clock.\n   * @return {Object} Object containing start and end frame timing info of segment.\n   */\n\n\n  var inspect = function inspect(bytes, baseTimestamp) {\n    var isAacData = probe.aac.isLikelyAacData(bytes);\n    var result;\n\n    if (isAacData) {\n      result = inspectAac_(bytes);\n    } else {\n      result = inspectTs_(bytes);\n    }\n\n    if (!result || !result.audio && !result.video) {\n      return null;\n    }\n\n    adjustTimestamp_(result, baseTimestamp);\n    return result;\n  };\n\n  var tsInspector = {\n    inspect: inspect,\n    parseAudioPes_: parseAudioPes_\n  };\n  /* global self */\n\n  /**\n   * Re-emits transmuxer events by converting them into messages to the\n   * world outside the worker.\n   *\n   * @param {Object} transmuxer the transmuxer to wire events on\n   * @private\n   */\n\n  var wireTransmuxerEvents = function wireTransmuxerEvents(self, transmuxer) {\n    transmuxer.on('data', function (segment) {\n      // transfer ownership of the underlying ArrayBuffer\n      // instead of doing a copy to save memory\n      // ArrayBuffers are transferable but generic TypedArrays are not\n      // @link https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Using_web_workers#Passing_data_by_transferring_ownership_(transferable_objects)\n      var initArray = segment.initSegment;\n      segment.initSegment = {\n        data: initArray.buffer,\n        byteOffset: initArray.byteOffset,\n        byteLength: initArray.byteLength\n      };\n      var typedArray = segment.data;\n      segment.data = typedArray.buffer;\n      self.postMessage({\n        action: 'data',\n        segment: segment,\n        byteOffset: typedArray.byteOffset,\n        byteLength: typedArray.byteLength\n      }, [segment.data]);\n    });\n    transmuxer.on('done', function (data) {\n      self.postMessage({\n        action: 'done'\n      });\n    });\n    transmuxer.on('gopInfo', function (gopInfo) {\n      self.postMessage({\n        action: 'gopInfo',\n        gopInfo: gopInfo\n      });\n    });\n    transmuxer.on('videoSegmentTimingInfo', function (timingInfo) {\n      var videoSegmentTimingInfo = {\n        start: {\n          decode: clock.videoTsToSeconds(timingInfo.start.dts),\n          presentation: clock.videoTsToSeconds(timingInfo.start.pts)\n        },\n        end: {\n          decode: clock.videoTsToSeconds(timingInfo.end.dts),\n          presentation: clock.videoTsToSeconds(timingInfo.end.pts)\n        },\n        baseMediaDecodeTime: clock.videoTsToSeconds(timingInfo.baseMediaDecodeTime)\n      };\n\n      if (timingInfo.prependedContentDuration) {\n        videoSegmentTimingInfo.prependedContentDuration = clock.videoTsToSeconds(timingInfo.prependedContentDuration);\n      }\n\n      self.postMessage({\n        action: 'videoSegmentTimingInfo',\n        videoSegmentTimingInfo: videoSegmentTimingInfo\n      });\n    });\n    transmuxer.on('audioSegmentTimingInfo', function (timingInfo) {\n      // Note that all times for [audio/video]SegmentTimingInfo events are in video clock\n      var audioSegmentTimingInfo = {\n        start: {\n          decode: clock.videoTsToSeconds(timingInfo.start.dts),\n          presentation: clock.videoTsToSeconds(timingInfo.start.pts)\n        },\n        end: {\n          decode: clock.videoTsToSeconds(timingInfo.end.dts),\n          presentation: clock.videoTsToSeconds(timingInfo.end.pts)\n        },\n        baseMediaDecodeTime: clock.videoTsToSeconds(timingInfo.baseMediaDecodeTime)\n      };\n\n      if (timingInfo.prependedContentDuration) {\n        audioSegmentTimingInfo.prependedContentDuration = clock.videoTsToSeconds(timingInfo.prependedContentDuration);\n      }\n\n      self.postMessage({\n        action: 'audioSegmentTimingInfo',\n        audioSegmentTimingInfo: audioSegmentTimingInfo\n      });\n    });\n    transmuxer.on('id3Frame', function (id3Frame) {\n      self.postMessage({\n        action: 'id3Frame',\n        id3Frame: id3Frame\n      });\n    });\n    transmuxer.on('caption', function (caption) {\n      self.postMessage({\n        action: 'caption',\n        caption: caption\n      });\n    });\n    transmuxer.on('trackinfo', function (trackInfo) {\n      self.postMessage({\n        action: 'trackinfo',\n        trackInfo: trackInfo\n      });\n    });\n    transmuxer.on('audioTimingInfo', function (audioTimingInfo) {\n      // convert to video TS since we prioritize video time over audio\n      self.postMessage({\n        action: 'audioTimingInfo',\n        audioTimingInfo: {\n          start: clock.videoTsToSeconds(audioTimingInfo.start),\n          end: clock.videoTsToSeconds(audioTimingInfo.end)\n        }\n      });\n    });\n    transmuxer.on('videoTimingInfo', function (videoTimingInfo) {\n      self.postMessage({\n        action: 'videoTimingInfo',\n        videoTimingInfo: {\n          start: clock.videoTsToSeconds(videoTimingInfo.start),\n          end: clock.videoTsToSeconds(videoTimingInfo.end)\n        }\n      });\n    });\n    transmuxer.on('log', function (log) {\n      self.postMessage({\n        action: 'log',\n        log: log\n      });\n    });\n  };\n  /**\n   * All incoming messages route through this hash. If no function exists\n   * to handle an incoming message, then we ignore the message.\n   *\n   * @class MessageHandlers\n   * @param {Object} options the options to initialize with\n   */\n\n\n  var MessageHandlers = /*#__PURE__*/function () {\n    function MessageHandlers(self, options) {\n      this.options = options || {};\n      this.self = self;\n      this.init();\n    }\n    /**\n     * initialize our web worker and wire all the events.\n     */\n\n\n    var _proto = MessageHandlers.prototype;\n\n    _proto.init = function init() {\n      if (this.transmuxer) {\n        this.transmuxer.dispose();\n      }\n\n      this.transmuxer = new transmuxer.Transmuxer(this.options);\n      wireTransmuxerEvents(this.self, this.transmuxer);\n    };\n\n    _proto.pushMp4Captions = function pushMp4Captions(data) {\n      if (!this.captionParser) {\n        this.captionParser = new captionParser();\n        this.captionParser.init();\n      }\n\n      var segment = new Uint8Array(data.data, data.byteOffset, data.byteLength);\n      var parsed = this.captionParser.parse(segment, data.trackIds, data.timescales);\n      this.self.postMessage({\n        action: 'mp4Captions',\n        captions: parsed && parsed.captions || [],\n        logs: parsed && parsed.logs || [],\n        data: segment.buffer\n      }, [segment.buffer]);\n    };\n\n    _proto.probeMp4StartTime = function probeMp4StartTime(_ref) {\n      var timescales = _ref.timescales,\n          data = _ref.data;\n      var startTime = probe$2.startTime(timescales, data);\n      this.self.postMessage({\n        action: 'probeMp4StartTime',\n        startTime: startTime,\n        data: data\n      }, [data.buffer]);\n    };\n\n    _proto.probeMp4Tracks = function probeMp4Tracks(_ref2) {\n      var data = _ref2.data;\n      var tracks = probe$2.tracks(data);\n      this.self.postMessage({\n        action: 'probeMp4Tracks',\n        tracks: tracks,\n        data: data\n      }, [data.buffer]);\n    }\n    /**\n     * Probe an mpeg2-ts segment to determine the start time of the segment in it's\n     * internal \"media time,\" as well as whether it contains video and/or audio.\n     *\n     * @private\n     * @param {Uint8Array} bytes - segment bytes\n     * @param {number} baseStartTime\n     *        Relative reference timestamp used when adjusting frame timestamps for rollover.\n     *        This value should be in seconds, as it's converted to a 90khz clock within the\n     *        function body.\n     * @return {Object} The start time of the current segment in \"media time\" as well as\n     *                  whether it contains video and/or audio\n     */\n    ;\n\n    _proto.probeTs = function probeTs(_ref3) {\n      var data = _ref3.data,\n          baseStartTime = _ref3.baseStartTime;\n      var tsStartTime = typeof baseStartTime === 'number' && !isNaN(baseStartTime) ? baseStartTime * clock.ONE_SECOND_IN_TS : void 0;\n      var timeInfo = tsInspector.inspect(data, tsStartTime);\n      var result = null;\n\n      if (timeInfo) {\n        result = {\n          // each type's time info comes back as an array of 2 times, start and end\n          hasVideo: timeInfo.video && timeInfo.video.length === 2 || false,\n          hasAudio: timeInfo.audio && timeInfo.audio.length === 2 || false\n        };\n\n        if (result.hasVideo) {\n          result.videoStart = timeInfo.video[0].ptsTime;\n        }\n\n        if (result.hasAudio) {\n          result.audioStart = timeInfo.audio[0].ptsTime;\n        }\n      }\n\n      this.self.postMessage({\n        action: 'probeTs',\n        result: result,\n        data: data\n      }, [data.buffer]);\n    };\n\n    _proto.clearAllMp4Captions = function clearAllMp4Captions() {\n      if (this.captionParser) {\n        this.captionParser.clearAllCaptions();\n      }\n    };\n\n    _proto.clearParsedMp4Captions = function clearParsedMp4Captions() {\n      if (this.captionParser) {\n        this.captionParser.clearParsedCaptions();\n      }\n    }\n    /**\n     * Adds data (a ts segment) to the start of the transmuxer pipeline for\n     * processing.\n     *\n     * @param {ArrayBuffer} data data to push into the muxer\n     */\n    ;\n\n    _proto.push = function push(data) {\n      // Cast array buffer to correct type for transmuxer\n      var segment = new Uint8Array(data.data, data.byteOffset, data.byteLength);\n      this.transmuxer.push(segment);\n    }\n    /**\n     * Recreate the transmuxer so that the next segment added via `push`\n     * start with a fresh transmuxer.\n     */\n    ;\n\n    _proto.reset = function reset() {\n      this.transmuxer.reset();\n    }\n    /**\n     * Set the value that will be used as the `baseMediaDecodeTime` time for the\n     * next segment pushed in. Subsequent segments will have their `baseMediaDecodeTime`\n     * set relative to the first based on the PTS values.\n     *\n     * @param {Object} data used to set the timestamp offset in the muxer\n     */\n    ;\n\n    _proto.setTimestampOffset = function setTimestampOffset(data) {\n      var timestampOffset = data.timestampOffset || 0;\n      this.transmuxer.setBaseMediaDecodeTime(Math.round(clock.secondsToVideoTs(timestampOffset)));\n    };\n\n    _proto.setAudioAppendStart = function setAudioAppendStart(data) {\n      this.transmuxer.setAudioAppendStart(Math.ceil(clock.secondsToVideoTs(data.appendStart)));\n    };\n\n    _proto.setRemux = function setRemux(data) {\n      this.transmuxer.setRemux(data.remux);\n    }\n    /**\n     * Forces the pipeline to finish processing the last segment and emit it's\n     * results.\n     *\n     * @param {Object} data event data, not really used\n     */\n    ;\n\n    _proto.flush = function flush(data) {\n      this.transmuxer.flush(); // transmuxed done action is fired after both audio/video pipelines are flushed\n\n      self.postMessage({\n        action: 'done',\n        type: 'transmuxed'\n      });\n    };\n\n    _proto.endTimeline = function endTimeline() {\n      this.transmuxer.endTimeline(); // transmuxed endedtimeline action is fired after both audio/video pipelines end their\n      // timelines\n\n      self.postMessage({\n        action: 'endedtimeline',\n        type: 'transmuxed'\n      });\n    };\n\n    _proto.alignGopsWith = function alignGopsWith(data) {\n      this.transmuxer.alignGopsWith(data.gopsToAlignWith.slice());\n    };\n\n    return MessageHandlers;\n  }();\n  /**\n   * Our web worker interface so that things can talk to mux.js\n   * that will be running in a web worker. the scope is passed to this by\n   * webworkify.\n   *\n   * @param {Object} self the scope for the web worker\n   */\n\n\n  self.onmessage = function (event) {\n    if (event.data.action === 'init' && event.data.options) {\n      this.messageHandlers = new MessageHandlers(self, event.data.options);\n      return;\n    }\n\n    if (!this.messageHandlers) {\n      this.messageHandlers = new MessageHandlers(self);\n    }\n\n    if (event.data && event.data.action && event.data.action !== 'init') {\n      if (this.messageHandlers[event.data.action]) {\n        this.messageHandlers[event.data.action](event.data);\n      }\n    }\n  };\n}));\nvar TransmuxWorker = factory(workerCode$1);\n/* rollup-plugin-worker-factory end for worker!/Users/gsinger/repos/clean/http-streaming/src/transmuxer-worker.js */\n\nvar handleData_ = function handleData_(event, transmuxedData, callback) {\n  var _event$data$segment = event.data.segment,\n      type = _event$data$segment.type,\n      initSegment = _event$data$segment.initSegment,\n      captions = _event$data$segment.captions,\n      captionStreams = _event$data$segment.captionStreams,\n      metadata = _event$data$segment.metadata,\n      videoFrameDtsTime = _event$data$segment.videoFrameDtsTime,\n      videoFramePtsTime = _event$data$segment.videoFramePtsTime;\n  transmuxedData.buffer.push({\n    captions: captions,\n    captionStreams: captionStreams,\n    metadata: metadata\n  });\n  var boxes = event.data.segment.boxes || {\n    data: event.data.segment.data\n  };\n  var result = {\n    type: type,\n    // cast ArrayBuffer to TypedArray\n    data: new Uint8Array(boxes.data, boxes.data.byteOffset, boxes.data.byteLength),\n    initSegment: new Uint8Array(initSegment.data, initSegment.byteOffset, initSegment.byteLength)\n  };\n\n  if (typeof videoFrameDtsTime !== 'undefined') {\n    result.videoFrameDtsTime = videoFrameDtsTime;\n  }\n\n  if (typeof videoFramePtsTime !== 'undefined') {\n    result.videoFramePtsTime = videoFramePtsTime;\n  }\n\n  callback(result);\n};\n\nvar handleDone_ = function handleDone_(_ref) {\n  var transmuxedData = _ref.transmuxedData,\n      callback = _ref.callback; // Previously we only returned data on data events,\n  // not on done events. Clear out the buffer to keep that consistent.\n\n  transmuxedData.buffer = []; // all buffers should have been flushed from the muxer, so start processing anything we\n  // have received\n\n  callback(transmuxedData);\n};\n\nvar handleGopInfo_ = function handleGopInfo_(event, transmuxedData) {\n  transmuxedData.gopInfo = event.data.gopInfo;\n};\n\nvar processTransmux = function processTransmux(options) {\n  var transmuxer = options.transmuxer,\n      bytes = options.bytes,\n      audioAppendStart = options.audioAppendStart,\n      gopsToAlignWith = options.gopsToAlignWith,\n      remux = options.remux,\n      onData = options.onData,\n      onTrackInfo = options.onTrackInfo,\n      onAudioTimingInfo = options.onAudioTimingInfo,\n      onVideoTimingInfo = options.onVideoTimingInfo,\n      onVideoSegmentTimingInfo = options.onVideoSegmentTimingInfo,\n      onAudioSegmentTimingInfo = options.onAudioSegmentTimingInfo,\n      onId3 = options.onId3,\n      onCaptions = options.onCaptions,\n      onDone = options.onDone,\n      onEndedTimeline = options.onEndedTimeline,\n      onTransmuxerLog = options.onTransmuxerLog,\n      isEndOfTimeline = options.isEndOfTimeline;\n  var transmuxedData = {\n    buffer: []\n  };\n  var waitForEndedTimelineEvent = isEndOfTimeline;\n\n  var handleMessage = function handleMessage(event) {\n    if (transmuxer.currentTransmux !== options) {\n      // disposed\n      return;\n    }\n\n    if (event.data.action === 'data') {\n      handleData_(event, transmuxedData, onData);\n    }\n\n    if (event.data.action === 'trackinfo') {\n      onTrackInfo(event.data.trackInfo);\n    }\n\n    if (event.data.action === 'gopInfo') {\n      handleGopInfo_(event, transmuxedData);\n    }\n\n    if (event.data.action === 'audioTimingInfo') {\n      onAudioTimingInfo(event.data.audioTimingInfo);\n    }\n\n    if (event.data.action === 'videoTimingInfo') {\n      onVideoTimingInfo(event.data.videoTimingInfo);\n    }\n\n    if (event.data.action === 'videoSegmentTimingInfo') {\n      onVideoSegmentTimingInfo(event.data.videoSegmentTimingInfo);\n    }\n\n    if (event.data.action === 'audioSegmentTimingInfo') {\n      onAudioSegmentTimingInfo(event.data.audioSegmentTimingInfo);\n    }\n\n    if (event.data.action === 'id3Frame') {\n      onId3([event.data.id3Frame], event.data.id3Frame.dispatchType);\n    }\n\n    if (event.data.action === 'caption') {\n      onCaptions(event.data.caption);\n    }\n\n    if (event.data.action === 'endedtimeline') {\n      waitForEndedTimelineEvent = false;\n      onEndedTimeline();\n    }\n\n    if (event.data.action === 'log') {\n      onTransmuxerLog(event.data.log);\n    } // wait for the transmuxed event since we may have audio and video\n\n\n    if (event.data.type !== 'transmuxed') {\n      return;\n    } // If the \"endedtimeline\" event has not yet fired, and this segment represents the end\n    // of a timeline, that means there may still be data events before the segment\n    // processing can be considerred complete. In that case, the final event should be\n    // an \"endedtimeline\" event with the type \"transmuxed.\"\n\n\n    if (waitForEndedTimelineEvent) {\n      return;\n    }\n\n    transmuxer.onmessage = null;\n    handleDone_({\n      transmuxedData: transmuxedData,\n      callback: onDone\n    });\n    /* eslint-disable no-use-before-define */\n\n    dequeue(transmuxer);\n    /* eslint-enable */\n  };\n\n  transmuxer.onmessage = handleMessage;\n\n  if (audioAppendStart) {\n    transmuxer.postMessage({\n      action: 'setAudioAppendStart',\n      appendStart: audioAppendStart\n    });\n  } // allow empty arrays to be passed to clear out GOPs\n\n\n  if (Array.isArray(gopsToAlignWith)) {\n    transmuxer.postMessage({\n      action: 'alignGopsWith',\n      gopsToAlignWith: gopsToAlignWith\n    });\n  }\n\n  if (typeof remux !== 'undefined') {\n    transmuxer.postMessage({\n      action: 'setRemux',\n      remux: remux\n    });\n  }\n\n  if (bytes.byteLength) {\n    var buffer = bytes instanceof ArrayBuffer ? bytes : bytes.buffer;\n    var byteOffset = bytes instanceof ArrayBuffer ? 0 : bytes.byteOffset;\n    transmuxer.postMessage({\n      action: 'push',\n      // Send the typed-array of data as an ArrayBuffer so that\n      // it can be sent as a \"Transferable\" and avoid the costly\n      // memory copy\n      data: buffer,\n      // To recreate the original typed-array, we need information\n      // about what portion of the ArrayBuffer it was a view into\n      byteOffset: byteOffset,\n      byteLength: bytes.byteLength\n    }, [buffer]);\n  }\n\n  if (isEndOfTimeline) {\n    transmuxer.postMessage({\n      action: 'endTimeline'\n    });\n  } // even if we didn't push any bytes, we have to make sure we flush in case we reached\n  // the end of the segment\n\n\n  transmuxer.postMessage({\n    action: 'flush'\n  });\n};\n\nvar dequeue = function dequeue(transmuxer) {\n  transmuxer.currentTransmux = null;\n\n  if (transmuxer.transmuxQueue.length) {\n    transmuxer.currentTransmux = transmuxer.transmuxQueue.shift();\n\n    if (typeof transmuxer.currentTransmux === 'function') {\n      transmuxer.currentTransmux();\n    } else {\n      processTransmux(transmuxer.currentTransmux);\n    }\n  }\n};\n\nvar processAction = function processAction(transmuxer, action) {\n  transmuxer.postMessage({\n    action: action\n  });\n  dequeue(transmuxer);\n};\n\nvar enqueueAction = function enqueueAction(action, transmuxer) {\n  if (!transmuxer.currentTransmux) {\n    transmuxer.currentTransmux = action;\n    processAction(transmuxer, action);\n    return;\n  }\n\n  transmuxer.transmuxQueue.push(processAction.bind(null, transmuxer, action));\n};\n\nvar reset = function reset(transmuxer) {\n  enqueueAction('reset', transmuxer);\n};\n\nvar endTimeline = function endTimeline(transmuxer) {\n  enqueueAction('endTimeline', transmuxer);\n};\n\nvar transmux = function transmux(options) {\n  if (!options.transmuxer.currentTransmux) {\n    options.transmuxer.currentTransmux = options;\n    processTransmux(options);\n    return;\n  }\n\n  options.transmuxer.transmuxQueue.push(options);\n};\n\nvar createTransmuxer = function createTransmuxer(options) {\n  var transmuxer = new TransmuxWorker();\n  transmuxer.currentTransmux = null;\n  transmuxer.transmuxQueue = [];\n  var term = transmuxer.terminate;\n\n  transmuxer.terminate = function () {\n    transmuxer.currentTransmux = null;\n    transmuxer.transmuxQueue.length = 0;\n    return term.call(transmuxer);\n  };\n\n  transmuxer.postMessage({\n    action: 'init',\n    options: options\n  });\n  return transmuxer;\n};\n\nvar segmentTransmuxer = {\n  reset: reset,\n  endTimeline: endTimeline,\n  transmux: transmux,\n  createTransmuxer: createTransmuxer\n};\n\nvar workerCallback = function workerCallback(options) {\n  var transmuxer = options.transmuxer;\n  var endAction = options.endAction || options.action;\n  var callback = options.callback;\n\n  var message = _extends({}, options, {\n    endAction: null,\n    transmuxer: null,\n    callback: null\n  });\n\n  var listenForEndEvent = function listenForEndEvent(event) {\n    if (event.data.action !== endAction) {\n      return;\n    }\n\n    transmuxer.removeEventListener('message', listenForEndEvent); // transfer ownership of bytes back to us.\n\n    if (event.data.data) {\n      event.data.data = new Uint8Array(event.data.data, options.byteOffset || 0, options.byteLength || event.data.data.byteLength);\n\n      if (options.data) {\n        options.data = event.data.data;\n      }\n    }\n\n    callback(event.data);\n  };\n\n  transmuxer.addEventListener('message', listenForEndEvent);\n\n  if (options.data) {\n    var isArrayBuffer = options.data instanceof ArrayBuffer;\n    message.byteOffset = isArrayBuffer ? 0 : options.data.byteOffset;\n    message.byteLength = options.data.byteLength;\n    var transfers = [isArrayBuffer ? options.data : options.data.buffer];\n    transmuxer.postMessage(message, transfers);\n  } else {\n    transmuxer.postMessage(message);\n  }\n};\n\nvar REQUEST_ERRORS = {\n  FAILURE: 2,\n  TIMEOUT: -101,\n  ABORTED: -102\n};\n/**\n * Abort all requests\n *\n * @param {Object} activeXhrs - an object that tracks all XHR requests\n */\n\nvar abortAll = function abortAll(activeXhrs) {\n  activeXhrs.forEach(function (xhr) {\n    xhr.abort();\n  });\n};\n/**\n * Gather important bandwidth stats once a request has completed\n *\n * @param {Object} request - the XHR request from which to gather stats\n */\n\n\nvar getRequestStats = function getRequestStats(request) {\n  return {\n    bandwidth: request.bandwidth,\n    bytesReceived: request.bytesReceived || 0,\n    roundTripTime: request.roundTripTime || 0\n  };\n};\n/**\n * If possible gather bandwidth stats as a request is in\n * progress\n *\n * @param {Event} progressEvent - an event object from an XHR's progress event\n */\n\n\nvar getProgressStats = function getProgressStats(progressEvent) {\n  var request = progressEvent.target;\n  var roundTripTime = Date.now() - request.requestTime;\n  var stats = {\n    bandwidth: Infinity,\n    bytesReceived: 0,\n    roundTripTime: roundTripTime || 0\n  };\n  stats.bytesReceived = progressEvent.loaded; // This can result in Infinity if stats.roundTripTime is 0 but that is ok\n  // because we should only use bandwidth stats on progress to determine when\n  // abort a request early due to insufficient bandwidth\n\n  stats.bandwidth = Math.floor(stats.bytesReceived / stats.roundTripTime * 8 * 1000);\n  return stats;\n};\n/**\n * Handle all error conditions in one place and return an object\n * with all the information\n *\n * @param {Error|null} error - if non-null signals an error occured with the XHR\n * @param {Object} request -  the XHR request that possibly generated the error\n */\n\n\nvar handleErrors = function handleErrors(error, request) {\n  if (request.timedout) {\n    return {\n      status: request.status,\n      message: 'HLS request timed-out at URL: ' + request.uri,\n      code: REQUEST_ERRORS.TIMEOUT,\n      xhr: request\n    };\n  }\n\n  if (request.aborted) {\n    return {\n      status: request.status,\n      message: 'HLS request aborted at URL: ' + request.uri,\n      code: REQUEST_ERRORS.ABORTED,\n      xhr: request\n    };\n  }\n\n  if (error) {\n    return {\n      status: request.status,\n      message: 'HLS request errored at URL: ' + request.uri,\n      code: REQUEST_ERRORS.FAILURE,\n      xhr: request\n    };\n  }\n\n  if (request.responseType === 'arraybuffer' && request.response.byteLength === 0) {\n    return {\n      status: request.status,\n      message: 'Empty HLS response at URL: ' + request.uri,\n      code: REQUEST_ERRORS.FAILURE,\n      xhr: request\n    };\n  }\n\n  return null;\n};\n/**\n * Handle responses for key data and convert the key data to the correct format\n * for the decryption step later\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Array} objects - objects to add the key bytes to.\n * @param {Function} finishProcessingFn - a callback to execute to continue processing\n *                                        this request\n */\n\n\nvar handleKeyResponse = function handleKeyResponse(segment, objects, finishProcessingFn) {\n  return function (error, request) {\n    var response = request.response;\n    var errorObj = handleErrors(error, request);\n\n    if (errorObj) {\n      return finishProcessingFn(errorObj, segment);\n    }\n\n    if (response.byteLength !== 16) {\n      return finishProcessingFn({\n        status: request.status,\n        message: 'Invalid HLS key at URL: ' + request.uri,\n        code: REQUEST_ERRORS.FAILURE,\n        xhr: request\n      }, segment);\n    }\n\n    var view = new DataView(response);\n    var bytes = new Uint32Array([view.getUint32(0), view.getUint32(4), view.getUint32(8), view.getUint32(12)]);\n\n    for (var i = 0; i < objects.length; i++) {\n      objects[i].bytes = bytes;\n    }\n\n    return finishProcessingFn(null, segment);\n  };\n};\n\nvar parseInitSegment = function parseInitSegment(segment, _callback) {\n  var type = detectContainerForBytes(segment.map.bytes); // TODO: We should also handle ts init segments here, but we\n  // only know how to parse mp4 init segments at the moment\n\n  if (type !== 'mp4') {\n    var uri = segment.map.resolvedUri || segment.map.uri;\n    return _callback({\n      internal: true,\n      message: \"Found unsupported \" + (type || 'unknown') + \" container for initialization segment at URL: \" + uri,\n      code: REQUEST_ERRORS.FAILURE\n    });\n  }\n\n  workerCallback({\n    action: 'probeMp4Tracks',\n    data: segment.map.bytes,\n    transmuxer: segment.transmuxer,\n    callback: function callback(_ref) {\n      var tracks = _ref.tracks,\n          data = _ref.data; // transfer bytes back to us\n\n      segment.map.bytes = data;\n      tracks.forEach(function (track) {\n        segment.map.tracks = segment.map.tracks || {}; // only support one track of each type for now\n\n        if (segment.map.tracks[track.type]) {\n          return;\n        }\n\n        segment.map.tracks[track.type] = track;\n\n        if (typeof track.id === 'number' && track.timescale) {\n          segment.map.timescales = segment.map.timescales || {};\n          segment.map.timescales[track.id] = track.timescale;\n        }\n      });\n      return _callback(null);\n    }\n  });\n};\n/**\n * Handle init-segment responses\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Function} finishProcessingFn - a callback to execute to continue processing\n *                                        this request\n */\n\n\nvar handleInitSegmentResponse = function handleInitSegmentResponse(_ref2) {\n  var segment = _ref2.segment,\n      finishProcessingFn = _ref2.finishProcessingFn;\n  return function (error, request) {\n    var errorObj = handleErrors(error, request);\n\n    if (errorObj) {\n      return finishProcessingFn(errorObj, segment);\n    }\n\n    var bytes = new Uint8Array(request.response); // init segment is encypted, we will have to wait\n    // until the key request is done to decrypt.\n\n    if (segment.map.key) {\n      segment.map.encryptedBytes = bytes;\n      return finishProcessingFn(null, segment);\n    }\n\n    segment.map.bytes = bytes;\n    parseInitSegment(segment, function (parseError) {\n      if (parseError) {\n        parseError.xhr = request;\n        parseError.status = request.status;\n        return finishProcessingFn(parseError, segment);\n      }\n\n      finishProcessingFn(null, segment);\n    });\n  };\n};\n/**\n * Response handler for segment-requests being sure to set the correct\n * property depending on whether the segment is encryped or not\n * Also records and keeps track of stats that are used for ABR purposes\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Function} finishProcessingFn - a callback to execute to continue processing\n *                                        this request\n */\n\n\nvar handleSegmentResponse = function handleSegmentResponse(_ref3) {\n  var segment = _ref3.segment,\n      finishProcessingFn = _ref3.finishProcessingFn,\n      responseType = _ref3.responseType;\n  return function (error, request) {\n    var errorObj = handleErrors(error, request);\n\n    if (errorObj) {\n      return finishProcessingFn(errorObj, segment);\n    }\n\n    var newBytes = // although responseText \"should\" exist, this guard serves to prevent an error being\n    // thrown for two primary cases:\n    // 1. the mime type override stops working, or is not implemented for a specific\n    //    browser\n    // 2. when using mock XHR libraries like sinon that do not allow the override behavior\n    responseType === 'arraybuffer' || !request.responseText ? request.response : stringToArrayBuffer(request.responseText.substring(segment.lastReachedChar || 0));\n    segment.stats = getRequestStats(request);\n\n    if (segment.key) {\n      segment.encryptedBytes = new Uint8Array(newBytes);\n    } else {\n      segment.bytes = new Uint8Array(newBytes);\n    }\n\n    return finishProcessingFn(null, segment);\n  };\n};\n\nvar transmuxAndNotify = function transmuxAndNotify(_ref4) {\n  var segment = _ref4.segment,\n      bytes = _ref4.bytes,\n      trackInfoFn = _ref4.trackInfoFn,\n      timingInfoFn = _ref4.timingInfoFn,\n      videoSegmentTimingInfoFn = _ref4.videoSegmentTimingInfoFn,\n      audioSegmentTimingInfoFn = _ref4.audioSegmentTimingInfoFn,\n      id3Fn = _ref4.id3Fn,\n      captionsFn = _ref4.captionsFn,\n      isEndOfTimeline = _ref4.isEndOfTimeline,\n      endedTimelineFn = _ref4.endedTimelineFn,\n      dataFn = _ref4.dataFn,\n      doneFn = _ref4.doneFn,\n      onTransmuxerLog = _ref4.onTransmuxerLog;\n  var fmp4Tracks = segment.map && segment.map.tracks || {};\n  var isMuxed = Boolean(fmp4Tracks.audio && fmp4Tracks.video); // Keep references to each function so we can null them out after we're done with them.\n  // One reason for this is that in the case of full segments, we want to trust start\n  // times from the probe, rather than the transmuxer.\n\n  var audioStartFn = timingInfoFn.bind(null, segment, 'audio', 'start');\n  var audioEndFn = timingInfoFn.bind(null, segment, 'audio', 'end');\n  var videoStartFn = timingInfoFn.bind(null, segment, 'video', 'start');\n  var videoEndFn = timingInfoFn.bind(null, segment, 'video', 'end');\n\n  var finish = function finish() {\n    return transmux({\n      bytes: bytes,\n      transmuxer: segment.transmuxer,\n      audioAppendStart: segment.audioAppendStart,\n      gopsToAlignWith: segment.gopsToAlignWith,\n      remux: isMuxed,\n      onData: function onData(result) {\n        result.type = result.type === 'combined' ? 'video' : result.type;\n        dataFn(segment, result);\n      },\n      onTrackInfo: function onTrackInfo(trackInfo) {\n        if (trackInfoFn) {\n          if (isMuxed) {\n            trackInfo.isMuxed = true;\n          }\n\n          trackInfoFn(segment, trackInfo);\n        }\n      },\n      onAudioTimingInfo: function onAudioTimingInfo(audioTimingInfo) {\n        // we only want the first start value we encounter\n        if (audioStartFn && typeof audioTimingInfo.start !== 'undefined') {\n          audioStartFn(audioTimingInfo.start);\n          audioStartFn = null;\n        } // we want to continually update the end time\n\n\n        if (audioEndFn && typeof audioTimingInfo.end !== 'undefined') {\n          audioEndFn(audioTimingInfo.end);\n        }\n      },\n      onVideoTimingInfo: function onVideoTimingInfo(videoTimingInfo) {\n        // we only want the first start value we encounter\n        if (videoStartFn && typeof videoTimingInfo.start !== 'undefined') {\n          videoStartFn(videoTimingInfo.start);\n          videoStartFn = null;\n        } // we want to continually update the end time\n\n\n        if (videoEndFn && typeof videoTimingInfo.end !== 'undefined') {\n          videoEndFn(videoTimingInfo.end);\n        }\n      },\n      onVideoSegmentTimingInfo: function onVideoSegmentTimingInfo(videoSegmentTimingInfo) {\n        videoSegmentTimingInfoFn(videoSegmentTimingInfo);\n      },\n      onAudioSegmentTimingInfo: function onAudioSegmentTimingInfo(audioSegmentTimingInfo) {\n        audioSegmentTimingInfoFn(audioSegmentTimingInfo);\n      },\n      onId3: function onId3(id3Frames, dispatchType) {\n        id3Fn(segment, id3Frames, dispatchType);\n      },\n      onCaptions: function onCaptions(captions) {\n        captionsFn(segment, [captions]);\n      },\n      isEndOfTimeline: isEndOfTimeline,\n      onEndedTimeline: function onEndedTimeline() {\n        endedTimelineFn();\n      },\n      onTransmuxerLog: onTransmuxerLog,\n      onDone: function onDone(result) {\n        if (!doneFn) {\n          return;\n        }\n\n        result.type = result.type === 'combined' ? 'video' : result.type;\n        doneFn(null, segment, result);\n      }\n    });\n  }; // In the transmuxer, we don't yet have the ability to extract a \"proper\" start time.\n  // Meaning cached frame data may corrupt our notion of where this segment\n  // really starts. To get around this, probe for the info needed.\n\n\n  workerCallback({\n    action: 'probeTs',\n    transmuxer: segment.transmuxer,\n    data: bytes,\n    baseStartTime: segment.baseStartTime,\n    callback: function callback(data) {\n      segment.bytes = bytes = data.data;\n      var probeResult = data.result;\n\n      if (probeResult) {\n        trackInfoFn(segment, {\n          hasAudio: probeResult.hasAudio,\n          hasVideo: probeResult.hasVideo,\n          isMuxed: isMuxed\n        });\n        trackInfoFn = null;\n\n        if (probeResult.hasAudio && !isMuxed) {\n          audioStartFn(probeResult.audioStart);\n        }\n\n        if (probeResult.hasVideo) {\n          videoStartFn(probeResult.videoStart);\n        }\n\n        audioStartFn = null;\n        videoStartFn = null;\n      }\n\n      finish();\n    }\n  });\n};\n\nvar handleSegmentBytes = function handleSegmentBytes(_ref5) {\n  var segment = _ref5.segment,\n      bytes = _ref5.bytes,\n      trackInfoFn = _ref5.trackInfoFn,\n      timingInfoFn = _ref5.timingInfoFn,\n      videoSegmentTimingInfoFn = _ref5.videoSegmentTimingInfoFn,\n      audioSegmentTimingInfoFn = _ref5.audioSegmentTimingInfoFn,\n      id3Fn = _ref5.id3Fn,\n      captionsFn = _ref5.captionsFn,\n      isEndOfTimeline = _ref5.isEndOfTimeline,\n      endedTimelineFn = _ref5.endedTimelineFn,\n      dataFn = _ref5.dataFn,\n      doneFn = _ref5.doneFn,\n      onTransmuxerLog = _ref5.onTransmuxerLog;\n  var bytesAsUint8Array = new Uint8Array(bytes); // TODO:\n  // We should have a handler that fetches the number of bytes required\n  // to check if something is fmp4. This will allow us to save bandwidth\n  // because we can only blacklist a playlist and abort requests\n  // by codec after trackinfo triggers.\n\n  if (isLikelyFmp4MediaSegment(bytesAsUint8Array)) {\n    segment.isFmp4 = true;\n    var tracks = segment.map.tracks;\n    var trackInfo = {\n      isFmp4: true,\n      hasVideo: !!tracks.video,\n      hasAudio: !!tracks.audio\n    }; // if we have a audio track, with a codec that is not set to\n    // encrypted audio\n\n    if (tracks.audio && tracks.audio.codec && tracks.audio.codec !== 'enca') {\n      trackInfo.audioCodec = tracks.audio.codec;\n    } // if we have a video track, with a codec that is not set to\n    // encrypted video\n\n\n    if (tracks.video && tracks.video.codec && tracks.video.codec !== 'encv') {\n      trackInfo.videoCodec = tracks.video.codec;\n    }\n\n    if (tracks.video && tracks.audio) {\n      trackInfo.isMuxed = true;\n    } // since we don't support appending fmp4 data on progress, we know we have the full\n    // segment here\n\n\n    trackInfoFn(segment, trackInfo); // The probe doesn't provide the segment end time, so only callback with the start\n    // time. The end time can be roughly calculated by the receiver using the duration.\n    //\n    // Note that the start time returned by the probe reflects the baseMediaDecodeTime, as\n    // that is the true start of the segment (where the playback engine should begin\n    // decoding).\n\n    var finishLoading = function finishLoading(captions) {\n      // if the track still has audio at this point it is only possible\n      // for it to be audio only. See `tracks.video && tracks.audio` if statement\n      // above.\n      // we make sure to use segment.bytes here as that\n      dataFn(segment, {\n        data: bytesAsUint8Array,\n        type: trackInfo.hasAudio && !trackInfo.isMuxed ? 'audio' : 'video'\n      });\n\n      if (captions && captions.length) {\n        captionsFn(segment, captions);\n      }\n\n      doneFn(null, segment, {});\n    };\n\n    workerCallback({\n      action: 'probeMp4StartTime',\n      timescales: segment.map.timescales,\n      data: bytesAsUint8Array,\n      transmuxer: segment.transmuxer,\n      callback: function callback(_ref6) {\n        var data = _ref6.data,\n            startTime = _ref6.startTime; // transfer bytes back to us\n\n        bytes = data.buffer;\n        segment.bytes = bytesAsUint8Array = data;\n\n        if (trackInfo.hasAudio && !trackInfo.isMuxed) {\n          timingInfoFn(segment, 'audio', 'start', startTime);\n        }\n\n        if (trackInfo.hasVideo) {\n          timingInfoFn(segment, 'video', 'start', startTime);\n        } // Run through the CaptionParser in case there are captions.\n        // Initialize CaptionParser if it hasn't been yet\n\n\n        if (!tracks.video || !data.byteLength || !segment.transmuxer) {\n          finishLoading();\n          return;\n        }\n\n        workerCallback({\n          action: 'pushMp4Captions',\n          endAction: 'mp4Captions',\n          transmuxer: segment.transmuxer,\n          data: bytesAsUint8Array,\n          timescales: segment.map.timescales,\n          trackIds: [tracks.video.id],\n          callback: function callback(message) {\n            // transfer bytes back to us\n            bytes = message.data.buffer;\n            segment.bytes = bytesAsUint8Array = message.data;\n            message.logs.forEach(function (log) {\n              onTransmuxerLog(videojs.mergeOptions(log, {\n                stream: 'mp4CaptionParser'\n              }));\n            });\n            finishLoading(message.captions);\n          }\n        });\n      }\n    });\n    return;\n  } // VTT or other segments that don't need processing\n\n\n  if (!segment.transmuxer) {\n    doneFn(null, segment, {});\n    return;\n  }\n\n  if (typeof segment.container === 'undefined') {\n    segment.container = detectContainerForBytes(bytesAsUint8Array);\n  }\n\n  if (segment.container !== 'ts' && segment.container !== 'aac') {\n    trackInfoFn(segment, {\n      hasAudio: false,\n      hasVideo: false\n    });\n    doneFn(null, segment, {});\n    return;\n  } // ts or aac\n\n\n  transmuxAndNotify({\n    segment: segment,\n    bytes: bytes,\n    trackInfoFn: trackInfoFn,\n    timingInfoFn: timingInfoFn,\n    videoSegmentTimingInfoFn: videoSegmentTimingInfoFn,\n    audioSegmentTimingInfoFn: audioSegmentTimingInfoFn,\n    id3Fn: id3Fn,\n    captionsFn: captionsFn,\n    isEndOfTimeline: isEndOfTimeline,\n    endedTimelineFn: endedTimelineFn,\n    dataFn: dataFn,\n    doneFn: doneFn,\n    onTransmuxerLog: onTransmuxerLog\n  });\n};\n\nvar decrypt = function decrypt(_ref7, callback) {\n  var id = _ref7.id,\n      key = _ref7.key,\n      encryptedBytes = _ref7.encryptedBytes,\n      decryptionWorker = _ref7.decryptionWorker;\n\n  var decryptionHandler = function decryptionHandler(event) {\n    if (event.data.source === id) {\n      decryptionWorker.removeEventListener('message', decryptionHandler);\n      var decrypted = event.data.decrypted;\n      callback(new Uint8Array(decrypted.bytes, decrypted.byteOffset, decrypted.byteLength));\n    }\n  };\n\n  decryptionWorker.addEventListener('message', decryptionHandler);\n  var keyBytes;\n\n  if (key.bytes.slice) {\n    keyBytes = key.bytes.slice();\n  } else {\n    keyBytes = new Uint32Array(Array.prototype.slice.call(key.bytes));\n  } // incrementally decrypt the bytes\n\n\n  decryptionWorker.postMessage(createTransferableMessage({\n    source: id,\n    encrypted: encryptedBytes,\n    key: keyBytes,\n    iv: key.iv\n  }), [encryptedBytes.buffer, keyBytes.buffer]);\n};\n/**\n * Decrypt the segment via the decryption web worker\n *\n * @param {WebWorker} decryptionWorker - a WebWorker interface to AES-128 decryption\n *                                       routines\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Function} trackInfoFn - a callback that receives track info\n * @param {Function} timingInfoFn - a callback that receives timing info\n * @param {Function} videoSegmentTimingInfoFn\n *                   a callback that receives video timing info based on media times and\n *                   any adjustments made by the transmuxer\n * @param {Function} audioSegmentTimingInfoFn\n *                   a callback that receives audio timing info based on media times and\n *                   any adjustments made by the transmuxer\n * @param {boolean}  isEndOfTimeline\n *                   true if this segment represents the last segment in a timeline\n * @param {Function} endedTimelineFn\n *                   a callback made when a timeline is ended, will only be called if\n *                   isEndOfTimeline is true\n * @param {Function} dataFn - a callback that is executed when segment bytes are available\n *                            and ready to use\n * @param {Function} doneFn - a callback that is executed after decryption has completed\n */\n\n\nvar decryptSegment = function decryptSegment(_ref8) {\n  var decryptionWorker = _ref8.decryptionWorker,\n      segment = _ref8.segment,\n      trackInfoFn = _ref8.trackInfoFn,\n      timingInfoFn = _ref8.timingInfoFn,\n      videoSegmentTimingInfoFn = _ref8.videoSegmentTimingInfoFn,\n      audioSegmentTimingInfoFn = _ref8.audioSegmentTimingInfoFn,\n      id3Fn = _ref8.id3Fn,\n      captionsFn = _ref8.captionsFn,\n      isEndOfTimeline = _ref8.isEndOfTimeline,\n      endedTimelineFn = _ref8.endedTimelineFn,\n      dataFn = _ref8.dataFn,\n      doneFn = _ref8.doneFn,\n      onTransmuxerLog = _ref8.onTransmuxerLog;\n  decrypt({\n    id: segment.requestId,\n    key: segment.key,\n    encryptedBytes: segment.encryptedBytes,\n    decryptionWorker: decryptionWorker\n  }, function (decryptedBytes) {\n    segment.bytes = decryptedBytes;\n    handleSegmentBytes({\n      segment: segment,\n      bytes: segment.bytes,\n      trackInfoFn: trackInfoFn,\n      timingInfoFn: timingInfoFn,\n      videoSegmentTimingInfoFn: videoSegmentTimingInfoFn,\n      audioSegmentTimingInfoFn: audioSegmentTimingInfoFn,\n      id3Fn: id3Fn,\n      captionsFn: captionsFn,\n      isEndOfTimeline: isEndOfTimeline,\n      endedTimelineFn: endedTimelineFn,\n      dataFn: dataFn,\n      doneFn: doneFn,\n      onTransmuxerLog: onTransmuxerLog\n    });\n  });\n};\n/**\n * This function waits for all XHRs to finish (with either success or failure)\n * before continueing processing via it's callback. The function gathers errors\n * from each request into a single errors array so that the error status for\n * each request can be examined later.\n *\n * @param {Object} activeXhrs - an object that tracks all XHR requests\n * @param {WebWorker} decryptionWorker - a WebWorker interface to AES-128 decryption\n *                                       routines\n * @param {Function} trackInfoFn - a callback that receives track info\n * @param {Function} timingInfoFn - a callback that receives timing info\n * @param {Function} videoSegmentTimingInfoFn\n *                   a callback that receives video timing info based on media times and\n *                   any adjustments made by the transmuxer\n * @param {Function} audioSegmentTimingInfoFn\n *                   a callback that receives audio timing info based on media times and\n *                   any adjustments made by the transmuxer\n * @param {Function} id3Fn - a callback that receives ID3 metadata\n * @param {Function} captionsFn - a callback that receives captions\n * @param {boolean}  isEndOfTimeline\n *                   true if this segment represents the last segment in a timeline\n * @param {Function} endedTimelineFn\n *                   a callback made when a timeline is ended, will only be called if\n *                   isEndOfTimeline is true\n * @param {Function} dataFn - a callback that is executed when segment bytes are available\n *                            and ready to use\n * @param {Function} doneFn - a callback that is executed after all resources have been\n *                            downloaded and any decryption completed\n */\n\n\nvar waitForCompletion = function waitForCompletion(_ref9) {\n  var activeXhrs = _ref9.activeXhrs,\n      decryptionWorker = _ref9.decryptionWorker,\n      trackInfoFn = _ref9.trackInfoFn,\n      timingInfoFn = _ref9.timingInfoFn,\n      videoSegmentTimingInfoFn = _ref9.videoSegmentTimingInfoFn,\n      audioSegmentTimingInfoFn = _ref9.audioSegmentTimingInfoFn,\n      id3Fn = _ref9.id3Fn,\n      captionsFn = _ref9.captionsFn,\n      isEndOfTimeline = _ref9.isEndOfTimeline,\n      endedTimelineFn = _ref9.endedTimelineFn,\n      dataFn = _ref9.dataFn,\n      doneFn = _ref9.doneFn,\n      onTransmuxerLog = _ref9.onTransmuxerLog;\n  var count = 0;\n  var didError = false;\n  return function (error, segment) {\n    if (didError) {\n      return;\n    }\n\n    if (error) {\n      didError = true; // If there are errors, we have to abort any outstanding requests\n\n      abortAll(activeXhrs); // Even though the requests above are aborted, and in theory we could wait until we\n      // handle the aborted events from those requests, there are some cases where we may\n      // never get an aborted event. For instance, if the network connection is lost and\n      // there were two requests, the first may have triggered an error immediately, while\n      // the second request remains unsent. In that case, the aborted algorithm will not\n      // trigger an abort: see https://xhr.spec.whatwg.org/#the-abort()-method\n      //\n      // We also can't rely on the ready state of the XHR, since the request that\n      // triggered the connection error may also show as a ready state of 0 (unsent).\n      // Therefore, we have to finish this group of requests immediately after the first\n      // seen error.\n\n      return doneFn(error, segment);\n    }\n\n    count += 1;\n\n    if (count === activeXhrs.length) {\n      var segmentFinish = function segmentFinish() {\n        if (segment.encryptedBytes) {\n          return decryptSegment({\n            decryptionWorker: decryptionWorker,\n            segment: segment,\n            trackInfoFn: trackInfoFn,\n            timingInfoFn: timingInfoFn,\n            videoSegmentTimingInfoFn: videoSegmentTimingInfoFn,\n            audioSegmentTimingInfoFn: audioSegmentTimingInfoFn,\n            id3Fn: id3Fn,\n            captionsFn: captionsFn,\n            isEndOfTimeline: isEndOfTimeline,\n            endedTimelineFn: endedTimelineFn,\n            dataFn: dataFn,\n            doneFn: doneFn,\n            onTransmuxerLog: onTransmuxerLog\n          });\n        } // Otherwise, everything is ready just continue\n\n\n        handleSegmentBytes({\n          segment: segment,\n          bytes: segment.bytes,\n          trackInfoFn: trackInfoFn,\n          timingInfoFn: timingInfoFn,\n          videoSegmentTimingInfoFn: videoSegmentTimingInfoFn,\n          audioSegmentTimingInfoFn: audioSegmentTimingInfoFn,\n          id3Fn: id3Fn,\n          captionsFn: captionsFn,\n          isEndOfTimeline: isEndOfTimeline,\n          endedTimelineFn: endedTimelineFn,\n          dataFn: dataFn,\n          doneFn: doneFn,\n          onTransmuxerLog: onTransmuxerLog\n        });\n      }; // Keep track of when *all* of the requests have completed\n\n\n      segment.endOfAllRequests = Date.now();\n\n      if (segment.map && segment.map.encryptedBytes && !segment.map.bytes) {\n        return decrypt({\n          decryptionWorker: decryptionWorker,\n          // add -init to the \"id\" to differentiate between segment\n          // and init segment decryption, just in case they happen\n          // at the same time at some point in the future.\n          id: segment.requestId + '-init',\n          encryptedBytes: segment.map.encryptedBytes,\n          key: segment.map.key\n        }, function (decryptedBytes) {\n          segment.map.bytes = decryptedBytes;\n          parseInitSegment(segment, function (parseError) {\n            if (parseError) {\n              abortAll(activeXhrs);\n              return doneFn(parseError, segment);\n            }\n\n            segmentFinish();\n          });\n        });\n      }\n\n      segmentFinish();\n    }\n  };\n};\n/**\n * Calls the abort callback if any request within the batch was aborted. Will only call\n * the callback once per batch of requests, even if multiple were aborted.\n *\n * @param {Object} loadendState - state to check to see if the abort function was called\n * @param {Function} abortFn - callback to call for abort\n */\n\n\nvar handleLoadEnd = function handleLoadEnd(_ref10) {\n  var loadendState = _ref10.loadendState,\n      abortFn = _ref10.abortFn;\n  return function (event) {\n    var request = event.target;\n\n    if (request.aborted && abortFn && !loadendState.calledAbortFn) {\n      abortFn();\n      loadendState.calledAbortFn = true;\n    }\n  };\n};\n/**\n * Simple progress event callback handler that gathers some stats before\n * executing a provided callback with the `segment` object\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Function} progressFn - a callback that is executed each time a progress event\n *                                is received\n * @param {Function} trackInfoFn - a callback that receives track info\n * @param {Function} timingInfoFn - a callback that receives timing info\n * @param {Function} videoSegmentTimingInfoFn\n *                   a callback that receives video timing info based on media times and\n *                   any adjustments made by the transmuxer\n * @param {Function} audioSegmentTimingInfoFn\n *                   a callback that receives audio timing info based on media times and\n *                   any adjustments made by the transmuxer\n * @param {boolean}  isEndOfTimeline\n *                   true if this segment represents the last segment in a timeline\n * @param {Function} endedTimelineFn\n *                   a callback made when a timeline is ended, will only be called if\n *                   isEndOfTimeline is true\n * @param {Function} dataFn - a callback that is executed when segment bytes are available\n *                            and ready to use\n * @param {Event} event - the progress event object from XMLHttpRequest\n */\n\n\nvar handleProgress = function handleProgress(_ref11) {\n  var segment = _ref11.segment,\n      progressFn = _ref11.progressFn;\n  _ref11.trackInfoFn;\n  _ref11.timingInfoFn;\n  _ref11.videoSegmentTimingInfoFn;\n  _ref11.audioSegmentTimingInfoFn;\n  _ref11.id3Fn;\n  _ref11.captionsFn;\n  _ref11.isEndOfTimeline;\n  _ref11.endedTimelineFn;\n  _ref11.dataFn;\n  return function (event) {\n    var request = event.target;\n\n    if (request.aborted) {\n      return;\n    }\n\n    segment.stats = videojs.mergeOptions(segment.stats, getProgressStats(event)); // record the time that we receive the first byte of data\n\n    if (!segment.stats.firstBytesReceivedAt && segment.stats.bytesReceived) {\n      segment.stats.firstBytesReceivedAt = Date.now();\n    }\n\n    return progressFn(event, segment);\n  };\n};\n/**\n * Load all resources and does any processing necessary for a media-segment\n *\n * Features:\n *   decrypts the media-segment if it has a key uri and an iv\n *   aborts *all* requests if *any* one request fails\n *\n * The segment object, at minimum, has the following format:\n * {\n *   resolvedUri: String,\n *   [transmuxer]: Object,\n *   [byterange]: {\n *     offset: Number,\n *     length: Number\n *   },\n *   [key]: {\n *     resolvedUri: String\n *     [byterange]: {\n *       offset: Number,\n *       length: Number\n *     },\n *     iv: {\n *       bytes: Uint32Array\n *     }\n *   },\n *   [map]: {\n *     resolvedUri: String,\n *     [byterange]: {\n *       offset: Number,\n *       length: Number\n *     },\n *     [bytes]: Uint8Array\n *   }\n * }\n * ...where [name] denotes optional properties\n *\n * @param {Function} xhr - an instance of the xhr wrapper in xhr.js\n * @param {Object} xhrOptions - the base options to provide to all xhr requests\n * @param {WebWorker} decryptionWorker - a WebWorker interface to AES-128\n *                                       decryption routines\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Function} abortFn - a callback called (only once) if any piece of a request was\n *                             aborted\n * @param {Function} progressFn - a callback that receives progress events from the main\n *                                segment's xhr request\n * @param {Function} trackInfoFn - a callback that receives track info\n * @param {Function} timingInfoFn - a callback that receives timing info\n * @param {Function} videoSegmentTimingInfoFn\n *                   a callback that receives video timing info based on media times and\n *                   any adjustments made by the transmuxer\n * @param {Function} audioSegmentTimingInfoFn\n *                   a callback that receives audio timing info based on media times and\n *                   any adjustments made by the transmuxer\n * @param {Function} id3Fn - a callback that receives ID3 metadata\n * @param {Function} captionsFn - a callback that receives captions\n * @param {boolean}  isEndOfTimeline\n *                   true if this segment represents the last segment in a timeline\n * @param {Function} endedTimelineFn\n *                   a callback made when a timeline is ended, will only be called if\n *                   isEndOfTimeline is true\n * @param {Function} dataFn - a callback that receives data from the main segment's xhr\n *                            request, transmuxed if needed\n * @param {Function} doneFn - a callback that is executed only once all requests have\n *                            succeeded or failed\n * @return {Function} a function that, when invoked, immediately aborts all\n *                     outstanding requests\n */\n\n\nvar mediaSegmentRequest = function mediaSegmentRequest(_ref12) {\n  var xhr = _ref12.xhr,\n      xhrOptions = _ref12.xhrOptions,\n      decryptionWorker = _ref12.decryptionWorker,\n      segment = _ref12.segment,\n      abortFn = _ref12.abortFn,\n      progressFn = _ref12.progressFn,\n      trackInfoFn = _ref12.trackInfoFn,\n      timingInfoFn = _ref12.timingInfoFn,\n      videoSegmentTimingInfoFn = _ref12.videoSegmentTimingInfoFn,\n      audioSegmentTimingInfoFn = _ref12.audioSegmentTimingInfoFn,\n      id3Fn = _ref12.id3Fn,\n      captionsFn = _ref12.captionsFn,\n      isEndOfTimeline = _ref12.isEndOfTimeline,\n      endedTimelineFn = _ref12.endedTimelineFn,\n      dataFn = _ref12.dataFn,\n      doneFn = _ref12.doneFn,\n      onTransmuxerLog = _ref12.onTransmuxerLog;\n  var activeXhrs = [];\n  var finishProcessingFn = waitForCompletion({\n    activeXhrs: activeXhrs,\n    decryptionWorker: decryptionWorker,\n    trackInfoFn: trackInfoFn,\n    timingInfoFn: timingInfoFn,\n    videoSegmentTimingInfoFn: videoSegmentTimingInfoFn,\n    audioSegmentTimingInfoFn: audioSegmentTimingInfoFn,\n    id3Fn: id3Fn,\n    captionsFn: captionsFn,\n    isEndOfTimeline: isEndOfTimeline,\n    endedTimelineFn: endedTimelineFn,\n    dataFn: dataFn,\n    doneFn: doneFn,\n    onTransmuxerLog: onTransmuxerLog\n  }); // optionally, request the decryption key\n\n  if (segment.key && !segment.key.bytes) {\n    var objects = [segment.key];\n\n    if (segment.map && !segment.map.bytes && segment.map.key && segment.map.key.resolvedUri === segment.key.resolvedUri) {\n      objects.push(segment.map.key);\n    }\n\n    var keyRequestOptions = videojs.mergeOptions(xhrOptions, {\n      uri: segment.key.resolvedUri,\n      responseType: 'arraybuffer'\n    });\n    var keyRequestCallback = handleKeyResponse(segment, objects, finishProcessingFn);\n    var keyXhr = xhr(keyRequestOptions, keyRequestCallback);\n    activeXhrs.push(keyXhr);\n  } // optionally, request the associated media init segment\n\n\n  if (segment.map && !segment.map.bytes) {\n    var differentMapKey = segment.map.key && (!segment.key || segment.key.resolvedUri !== segment.map.key.resolvedUri);\n\n    if (differentMapKey) {\n      var mapKeyRequestOptions = videojs.mergeOptions(xhrOptions, {\n        uri: segment.map.key.resolvedUri,\n        responseType: 'arraybuffer'\n      });\n      var mapKeyRequestCallback = handleKeyResponse(segment, [segment.map.key], finishProcessingFn);\n      var mapKeyXhr = xhr(mapKeyRequestOptions, mapKeyRequestCallback);\n      activeXhrs.push(mapKeyXhr);\n    }\n\n    var initSegmentOptions = videojs.mergeOptions(xhrOptions, {\n      uri: segment.map.resolvedUri,\n      responseType: 'arraybuffer',\n      headers: segmentXhrHeaders(segment.map)\n    });\n    var initSegmentRequestCallback = handleInitSegmentResponse({\n      segment: segment,\n      finishProcessingFn: finishProcessingFn\n    });\n    var initSegmentXhr = xhr(initSegmentOptions, initSegmentRequestCallback);\n    activeXhrs.push(initSegmentXhr);\n  }\n\n  var segmentRequestOptions = videojs.mergeOptions(xhrOptions, {\n    uri: segment.part && segment.part.resolvedUri || segment.resolvedUri,\n    responseType: 'arraybuffer',\n    headers: segmentXhrHeaders(segment)\n  });\n  var segmentRequestCallback = handleSegmentResponse({\n    segment: segment,\n    finishProcessingFn: finishProcessingFn,\n    responseType: segmentRequestOptions.responseType\n  });\n  var segmentXhr = xhr(segmentRequestOptions, segmentRequestCallback);\n  segmentXhr.addEventListener('progress', handleProgress({\n    segment: segment,\n    progressFn: progressFn,\n    trackInfoFn: trackInfoFn,\n    timingInfoFn: timingInfoFn,\n    videoSegmentTimingInfoFn: videoSegmentTimingInfoFn,\n    audioSegmentTimingInfoFn: audioSegmentTimingInfoFn,\n    id3Fn: id3Fn,\n    captionsFn: captionsFn,\n    isEndOfTimeline: isEndOfTimeline,\n    endedTimelineFn: endedTimelineFn,\n    dataFn: dataFn\n  }));\n  activeXhrs.push(segmentXhr); // since all parts of the request must be considered, but should not make callbacks\n  // multiple times, provide a shared state object\n\n  var loadendState = {};\n  activeXhrs.forEach(function (activeXhr) {\n    activeXhr.addEventListener('loadend', handleLoadEnd({\n      loadendState: loadendState,\n      abortFn: abortFn\n    }));\n  });\n  return function () {\n    return abortAll(activeXhrs);\n  };\n};\n/**\n * @file - codecs.js - Handles tasks regarding codec strings such as translating them to\n * codec strings, or translating codec strings into objects that can be examined.\n */\n\n\nvar logFn$1 = logger('CodecUtils');\n/**\n * Returns a set of codec strings parsed from the playlist or the default\n * codec strings if no codecs were specified in the playlist\n *\n * @param {Playlist} media the current media playlist\n * @return {Object} an object with the video and audio codecs\n */\n\nvar getCodecs = function getCodecs(media) {\n  // if the codecs were explicitly specified, use them instead of the\n  // defaults\n  var mediaAttributes = media.attributes || {};\n\n  if (mediaAttributes.CODECS) {\n    return parseCodecs(mediaAttributes.CODECS);\n  }\n};\n\nvar isMaat = function isMaat(master, media) {\n  var mediaAttributes = media.attributes || {};\n  return master && master.mediaGroups && master.mediaGroups.AUDIO && mediaAttributes.AUDIO && master.mediaGroups.AUDIO[mediaAttributes.AUDIO];\n};\n\nvar isMuxed = function isMuxed(master, media) {\n  if (!isMaat(master, media)) {\n    return true;\n  }\n\n  var mediaAttributes = media.attributes || {};\n  var audioGroup = master.mediaGroups.AUDIO[mediaAttributes.AUDIO];\n\n  for (var groupId in audioGroup) {\n    // If an audio group has a URI (the case for HLS, as HLS will use external playlists),\n    // or there are listed playlists (the case for DASH, as the manifest will have already\n    // provided all of the details necessary to generate the audio playlist, as opposed to\n    // HLS' externally requested playlists), then the content is demuxed.\n    if (!audioGroup[groupId].uri && !audioGroup[groupId].playlists) {\n      return true;\n    }\n  }\n\n  return false;\n};\n\nvar unwrapCodecList = function unwrapCodecList(codecList) {\n  var codecs = {};\n  codecList.forEach(function (_ref) {\n    var mediaType = _ref.mediaType,\n        type = _ref.type,\n        details = _ref.details;\n    codecs[mediaType] = codecs[mediaType] || [];\n    codecs[mediaType].push(translateLegacyCodec(\"\" + type + details));\n  });\n  Object.keys(codecs).forEach(function (mediaType) {\n    if (codecs[mediaType].length > 1) {\n      logFn$1(\"multiple \" + mediaType + \" codecs found as attributes: \" + codecs[mediaType].join(', ') + \". Setting playlist codecs to null so that we wait for mux.js to probe segments for real codecs.\");\n      codecs[mediaType] = null;\n      return;\n    }\n\n    codecs[mediaType] = codecs[mediaType][0];\n  });\n  return codecs;\n};\n\nvar codecCount = function codecCount(codecObj) {\n  var count = 0;\n\n  if (codecObj.audio) {\n    count++;\n  }\n\n  if (codecObj.video) {\n    count++;\n  }\n\n  return count;\n};\n/**\n * Calculates the codec strings for a working configuration of\n * SourceBuffers to play variant streams in a master playlist. If\n * there is no possible working configuration, an empty object will be\n * returned.\n *\n * @param master {Object} the m3u8 object for the master playlist\n * @param media {Object} the m3u8 object for the variant playlist\n * @return {Object} the codec strings.\n *\n * @private\n */\n\n\nvar codecsForPlaylist = function codecsForPlaylist(master, media) {\n  var mediaAttributes = media.attributes || {};\n  var codecInfo = unwrapCodecList(getCodecs(media) || []); // HLS with multiple-audio tracks must always get an audio codec.\n  // Put another way, there is no way to have a video-only multiple-audio HLS!\n\n  if (isMaat(master, media) && !codecInfo.audio) {\n    if (!isMuxed(master, media)) {\n      // It is possible for codecs to be specified on the audio media group playlist but\n      // not on the rendition playlist. This is mostly the case for DASH, where audio and\n      // video are always separate (and separately specified).\n      var defaultCodecs = unwrapCodecList(codecsFromDefault(master, mediaAttributes.AUDIO) || []);\n\n      if (defaultCodecs.audio) {\n        codecInfo.audio = defaultCodecs.audio;\n      }\n    }\n  }\n\n  return codecInfo;\n};\n\nvar logFn = logger('PlaylistSelector');\n\nvar representationToString = function representationToString(representation) {\n  if (!representation || !representation.playlist) {\n    return;\n  }\n\n  var playlist = representation.playlist;\n  return JSON.stringify({\n    id: playlist.id,\n    bandwidth: representation.bandwidth,\n    width: representation.width,\n    height: representation.height,\n    codecs: playlist.attributes && playlist.attributes.CODECS || ''\n  });\n}; // Utilities\n\n/**\n * Returns the CSS value for the specified property on an element\n * using `getComputedStyle`. Firefox has a long-standing issue where\n * getComputedStyle() may return null when running in an iframe with\n * `display: none`.\n *\n * @see https://bugzilla.mozilla.org/show_bug.cgi?id=548397\n * @param {HTMLElement} el the htmlelement to work on\n * @param {string} the proprety to get the style for\n */\n\n\nvar safeGetComputedStyle = function safeGetComputedStyle(el, property) {\n  if (!el) {\n    return '';\n  }\n\n  var result = window$1.getComputedStyle(el);\n\n  if (!result) {\n    return '';\n  }\n\n  return result[property];\n};\n/**\n * Resuable stable sort function\n *\n * @param {Playlists} array\n * @param {Function} sortFn Different comparators\n * @function stableSort\n */\n\n\nvar stableSort = function stableSort(array, sortFn) {\n  var newArray = array.slice();\n  array.sort(function (left, right) {\n    var cmp = sortFn(left, right);\n\n    if (cmp === 0) {\n      return newArray.indexOf(left) - newArray.indexOf(right);\n    }\n\n    return cmp;\n  });\n};\n/**\n * A comparator function to sort two playlist object by bandwidth.\n *\n * @param {Object} left a media playlist object\n * @param {Object} right a media playlist object\n * @return {number} Greater than zero if the bandwidth attribute of\n * left is greater than the corresponding attribute of right. Less\n * than zero if the bandwidth of right is greater than left and\n * exactly zero if the two are equal.\n */\n\n\nvar comparePlaylistBandwidth = function comparePlaylistBandwidth(left, right) {\n  var leftBandwidth;\n  var rightBandwidth;\n\n  if (left.attributes.BANDWIDTH) {\n    leftBandwidth = left.attributes.BANDWIDTH;\n  }\n\n  leftBandwidth = leftBandwidth || window$1.Number.MAX_VALUE;\n\n  if (right.attributes.BANDWIDTH) {\n    rightBandwidth = right.attributes.BANDWIDTH;\n  }\n\n  rightBandwidth = rightBandwidth || window$1.Number.MAX_VALUE;\n  return leftBandwidth - rightBandwidth;\n};\n/**\n * A comparator function to sort two playlist object by resolution (width).\n *\n * @param {Object} left a media playlist object\n * @param {Object} right a media playlist object\n * @return {number} Greater than zero if the resolution.width attribute of\n * left is greater than the corresponding attribute of right. Less\n * than zero if the resolution.width of right is greater than left and\n * exactly zero if the two are equal.\n */\n\n\nvar comparePlaylistResolution = function comparePlaylistResolution(left, right) {\n  var leftWidth;\n  var rightWidth;\n\n  if (left.attributes.RESOLUTION && left.attributes.RESOLUTION.width) {\n    leftWidth = left.attributes.RESOLUTION.width;\n  }\n\n  leftWidth = leftWidth || window$1.Number.MAX_VALUE;\n\n  if (right.attributes.RESOLUTION && right.attributes.RESOLUTION.width) {\n    rightWidth = right.attributes.RESOLUTION.width;\n  }\n\n  rightWidth = rightWidth || window$1.Number.MAX_VALUE; // NOTE - Fallback to bandwidth sort as appropriate in cases where multiple renditions\n  // have the same media dimensions/ resolution\n\n  if (leftWidth === rightWidth && left.attributes.BANDWIDTH && right.attributes.BANDWIDTH) {\n    return left.attributes.BANDWIDTH - right.attributes.BANDWIDTH;\n  }\n\n  return leftWidth - rightWidth;\n};\n/**\n * Chooses the appropriate media playlist based on bandwidth and player size\n *\n * @param {Object} master\n *        Object representation of the master manifest\n * @param {number} playerBandwidth\n *        Current calculated bandwidth of the player\n * @param {number} playerWidth\n *        Current width of the player element (should account for the device pixel ratio)\n * @param {number} playerHeight\n *        Current height of the player element (should account for the device pixel ratio)\n * @param {boolean} limitRenditionByPlayerDimensions\n *        True if the player width and height should be used during the selection, false otherwise\n * @param {Object} masterPlaylistController\n *        the current masterPlaylistController object\n * @return {Playlist} the highest bitrate playlist less than the\n * currently detected bandwidth, accounting for some amount of\n * bandwidth variance\n */\n\n\nvar simpleSelector = function simpleSelector(master, playerBandwidth, playerWidth, playerHeight, limitRenditionByPlayerDimensions, masterPlaylistController) {\n  // If we end up getting called before `master` is available, exit early\n  if (!master) {\n    return;\n  }\n\n  var options = {\n    bandwidth: playerBandwidth,\n    width: playerWidth,\n    height: playerHeight,\n    limitRenditionByPlayerDimensions: limitRenditionByPlayerDimensions\n  };\n  var playlists = master.playlists; // if playlist is audio only, select between currently active audio group playlists.\n\n  if (Playlist.isAudioOnly(master)) {\n    playlists = masterPlaylistController.getAudioTrackPlaylists_(); // add audioOnly to options so that we log audioOnly: true\n    // at the buttom of this function for debugging.\n\n    options.audioOnly = true;\n  } // convert the playlists to an intermediary representation to make comparisons easier\n\n\n  var sortedPlaylistReps = playlists.map(function (playlist) {\n    var bandwidth;\n    var width = playlist.attributes && playlist.attributes.RESOLUTION && playlist.attributes.RESOLUTION.width;\n    var height = playlist.attributes && playlist.attributes.RESOLUTION && playlist.attributes.RESOLUTION.height;\n    bandwidth = playlist.attributes && playlist.attributes.BANDWIDTH;\n    bandwidth = bandwidth || window$1.Number.MAX_VALUE;\n    return {\n      bandwidth: bandwidth,\n      width: width,\n      height: height,\n      playlist: playlist\n    };\n  });\n  stableSort(sortedPlaylistReps, function (left, right) {\n    return left.bandwidth - right.bandwidth;\n  }); // filter out any playlists that have been excluded due to\n  // incompatible configurations\n\n  sortedPlaylistReps = sortedPlaylistReps.filter(function (rep) {\n    return !Playlist.isIncompatible(rep.playlist);\n  }); // filter out any playlists that have been disabled manually through the representations\n  // api or blacklisted temporarily due to playback errors.\n\n  var enabledPlaylistReps = sortedPlaylistReps.filter(function (rep) {\n    return Playlist.isEnabled(rep.playlist);\n  });\n\n  if (!enabledPlaylistReps.length) {\n    // if there are no enabled playlists, then they have all been blacklisted or disabled\n    // by the user through the representations api. In this case, ignore blacklisting and\n    // fallback to what the user wants by using playlists the user has not disabled.\n    enabledPlaylistReps = sortedPlaylistReps.filter(function (rep) {\n      return !Playlist.isDisabled(rep.playlist);\n    });\n  } // filter out any variant that has greater effective bitrate\n  // than the current estimated bandwidth\n\n\n  var bandwidthPlaylistReps = enabledPlaylistReps.filter(function (rep) {\n    return rep.bandwidth * Config.BANDWIDTH_VARIANCE < playerBandwidth;\n  });\n  var highestRemainingBandwidthRep = bandwidthPlaylistReps[bandwidthPlaylistReps.length - 1]; // get all of the renditions with the same (highest) bandwidth\n  // and then taking the very first element\n\n  var bandwidthBestRep = bandwidthPlaylistReps.filter(function (rep) {\n    return rep.bandwidth === highestRemainingBandwidthRep.bandwidth;\n  })[0]; // if we're not going to limit renditions by player size, make an early decision.\n\n  if (limitRenditionByPlayerDimensions === false) {\n    var _chosenRep = bandwidthBestRep || enabledPlaylistReps[0] || sortedPlaylistReps[0];\n\n    if (_chosenRep && _chosenRep.playlist) {\n      var type = 'sortedPlaylistReps';\n\n      if (bandwidthBestRep) {\n        type = 'bandwidthBestRep';\n      }\n\n      if (enabledPlaylistReps[0]) {\n        type = 'enabledPlaylistReps';\n      }\n\n      logFn(\"choosing \" + representationToString(_chosenRep) + \" using \" + type + \" with options\", options);\n      return _chosenRep.playlist;\n    }\n\n    logFn('could not choose a playlist with options', options);\n    return null;\n  } // filter out playlists without resolution information\n\n\n  var haveResolution = bandwidthPlaylistReps.filter(function (rep) {\n    return rep.width && rep.height;\n  }); // sort variants by resolution\n\n  stableSort(haveResolution, function (left, right) {\n    return left.width - right.width;\n  }); // if we have the exact resolution as the player use it\n\n  var resolutionBestRepList = haveResolution.filter(function (rep) {\n    return rep.width === playerWidth && rep.height === playerHeight;\n  });\n  highestRemainingBandwidthRep = resolutionBestRepList[resolutionBestRepList.length - 1]; // ensure that we pick the highest bandwidth variant that have exact resolution\n\n  var resolutionBestRep = resolutionBestRepList.filter(function (rep) {\n    return rep.bandwidth === highestRemainingBandwidthRep.bandwidth;\n  })[0];\n  var resolutionPlusOneList;\n  var resolutionPlusOneSmallest;\n  var resolutionPlusOneRep; // find the smallest variant that is larger than the player\n  // if there is no match of exact resolution\n\n  if (!resolutionBestRep) {\n    resolutionPlusOneList = haveResolution.filter(function (rep) {\n      return rep.width > playerWidth || rep.height > playerHeight;\n    }); // find all the variants have the same smallest resolution\n\n    resolutionPlusOneSmallest = resolutionPlusOneList.filter(function (rep) {\n      return rep.width === resolutionPlusOneList[0].width && rep.height === resolutionPlusOneList[0].height;\n    }); // ensure that we also pick the highest bandwidth variant that\n    // is just-larger-than the video player\n\n    highestRemainingBandwidthRep = resolutionPlusOneSmallest[resolutionPlusOneSmallest.length - 1];\n    resolutionPlusOneRep = resolutionPlusOneSmallest.filter(function (rep) {\n      return rep.bandwidth === highestRemainingBandwidthRep.bandwidth;\n    })[0];\n  }\n\n  var leastPixelDiffRep; // If this selector proves to be better than others,\n  // resolutionPlusOneRep and resolutionBestRep and all\n  // the code involving them should be removed.\n\n  if (masterPlaylistController.experimentalLeastPixelDiffSelector) {\n    // find the variant that is closest to the player's pixel size\n    var leastPixelDiffList = haveResolution.map(function (rep) {\n      rep.pixelDiff = Math.abs(rep.width - playerWidth) + Math.abs(rep.height - playerHeight);\n      return rep;\n    }); // get the highest bandwidth, closest resolution playlist\n\n    stableSort(leastPixelDiffList, function (left, right) {\n      // sort by highest bandwidth if pixelDiff is the same\n      if (left.pixelDiff === right.pixelDiff) {\n        return right.bandwidth - left.bandwidth;\n      }\n\n      return left.pixelDiff - right.pixelDiff;\n    });\n    leastPixelDiffRep = leastPixelDiffList[0];\n  } // fallback chain of variants\n\n\n  var chosenRep = leastPixelDiffRep || resolutionPlusOneRep || resolutionBestRep || bandwidthBestRep || enabledPlaylistReps[0] || sortedPlaylistReps[0];\n\n  if (chosenRep && chosenRep.playlist) {\n    var _type = 'sortedPlaylistReps';\n\n    if (leastPixelDiffRep) {\n      _type = 'leastPixelDiffRep';\n    } else if (resolutionPlusOneRep) {\n      _type = 'resolutionPlusOneRep';\n    } else if (resolutionBestRep) {\n      _type = 'resolutionBestRep';\n    } else if (bandwidthBestRep) {\n      _type = 'bandwidthBestRep';\n    } else if (enabledPlaylistReps[0]) {\n      _type = 'enabledPlaylistReps';\n    }\n\n    logFn(\"choosing \" + representationToString(chosenRep) + \" using \" + _type + \" with options\", options);\n    return chosenRep.playlist;\n  }\n\n  logFn('could not choose a playlist with options', options);\n  return null;\n};\n/**\n * Chooses the appropriate media playlist based on the most recent\n * bandwidth estimate and the player size.\n *\n * Expects to be called within the context of an instance of VhsHandler\n *\n * @return {Playlist} the highest bitrate playlist less than the\n * currently detected bandwidth, accounting for some amount of\n * bandwidth variance\n */\n\n\nvar lastBandwidthSelector = function lastBandwidthSelector() {\n  var pixelRatio = this.useDevicePixelRatio ? window$1.devicePixelRatio || 1 : 1;\n  return simpleSelector(this.playlists.master, this.systemBandwidth, parseInt(safeGetComputedStyle(this.tech_.el(), 'width'), 10) * pixelRatio, parseInt(safeGetComputedStyle(this.tech_.el(), 'height'), 10) * pixelRatio, this.limitRenditionByPlayerDimensions, this.masterPlaylistController_);\n};\n/**\n * Chooses the appropriate media playlist based on an\n * exponential-weighted moving average of the bandwidth after\n * filtering for player size.\n *\n * Expects to be called within the context of an instance of VhsHandler\n *\n * @param {number} decay - a number between 0 and 1. Higher values of\n * this parameter will cause previous bandwidth estimates to lose\n * significance more quickly.\n * @return {Function} a function which can be invoked to create a new\n * playlist selector function.\n * @see https://en.wikipedia.org/wiki/Moving_average#Exponential_moving_average\n */\n\n\nvar movingAverageBandwidthSelector = function movingAverageBandwidthSelector(decay) {\n  var average = -1;\n  var lastSystemBandwidth = -1;\n\n  if (decay < 0 || decay > 1) {\n    throw new Error('Moving average bandwidth decay must be between 0 and 1.');\n  }\n\n  return function () {\n    var pixelRatio = this.useDevicePixelRatio ? window$1.devicePixelRatio || 1 : 1;\n\n    if (average < 0) {\n      average = this.systemBandwidth;\n      lastSystemBandwidth = this.systemBandwidth;\n    } // stop the average value from decaying for every 250ms\n    // when the systemBandwidth is constant\n    // and\n    // stop average from setting to a very low value when the\n    // systemBandwidth becomes 0 in case of chunk cancellation\n\n\n    if (this.systemBandwidth > 0 && this.systemBandwidth !== lastSystemBandwidth) {\n      average = decay * this.systemBandwidth + (1 - decay) * average;\n      lastSystemBandwidth = this.systemBandwidth;\n    }\n\n    return simpleSelector(this.playlists.master, average, parseInt(safeGetComputedStyle(this.tech_.el(), 'width'), 10) * pixelRatio, parseInt(safeGetComputedStyle(this.tech_.el(), 'height'), 10) * pixelRatio, this.limitRenditionByPlayerDimensions, this.masterPlaylistController_);\n  };\n};\n/**\n * Chooses the appropriate media playlist based on the potential to rebuffer\n *\n * @param {Object} settings\n *        Object of information required to use this selector\n * @param {Object} settings.master\n *        Object representation of the master manifest\n * @param {number} settings.currentTime\n *        The current time of the player\n * @param {number} settings.bandwidth\n *        Current measured bandwidth\n * @param {number} settings.duration\n *        Duration of the media\n * @param {number} settings.segmentDuration\n *        Segment duration to be used in round trip time calculations\n * @param {number} settings.timeUntilRebuffer\n *        Time left in seconds until the player has to rebuffer\n * @param {number} settings.currentTimeline\n *        The current timeline segments are being loaded from\n * @param {SyncController} settings.syncController\n *        SyncController for determining if we have a sync point for a given playlist\n * @return {Object|null}\n *         {Object} return.playlist\n *         The highest bandwidth playlist with the least amount of rebuffering\n *         {Number} return.rebufferingImpact\n *         The amount of time in seconds switching to this playlist will rebuffer. A\n *         negative value means that switching will cause zero rebuffering.\n */\n\n\nvar minRebufferMaxBandwidthSelector = function minRebufferMaxBandwidthSelector(settings) {\n  var master = settings.master,\n      currentTime = settings.currentTime,\n      bandwidth = settings.bandwidth,\n      duration = settings.duration,\n      segmentDuration = settings.segmentDuration,\n      timeUntilRebuffer = settings.timeUntilRebuffer,\n      currentTimeline = settings.currentTimeline,\n      syncController = settings.syncController; // filter out any playlists that have been excluded due to\n  // incompatible configurations\n\n  var compatiblePlaylists = master.playlists.filter(function (playlist) {\n    return !Playlist.isIncompatible(playlist);\n  }); // filter out any playlists that have been disabled manually through the representations\n  // api or blacklisted temporarily due to playback errors.\n\n  var enabledPlaylists = compatiblePlaylists.filter(Playlist.isEnabled);\n\n  if (!enabledPlaylists.length) {\n    // if there are no enabled playlists, then they have all been blacklisted or disabled\n    // by the user through the representations api. In this case, ignore blacklisting and\n    // fallback to what the user wants by using playlists the user has not disabled.\n    enabledPlaylists = compatiblePlaylists.filter(function (playlist) {\n      return !Playlist.isDisabled(playlist);\n    });\n  }\n\n  var bandwidthPlaylists = enabledPlaylists.filter(Playlist.hasAttribute.bind(null, 'BANDWIDTH'));\n  var rebufferingEstimates = bandwidthPlaylists.map(function (playlist) {\n    var syncPoint = syncController.getSyncPoint(playlist, duration, currentTimeline, currentTime); // If there is no sync point for this playlist, switching to it will require a\n    // sync request first. This will double the request time\n\n    var numRequests = syncPoint ? 1 : 2;\n    var requestTimeEstimate = Playlist.estimateSegmentRequestTime(segmentDuration, bandwidth, playlist);\n    var rebufferingImpact = requestTimeEstimate * numRequests - timeUntilRebuffer;\n    return {\n      playlist: playlist,\n      rebufferingImpact: rebufferingImpact\n    };\n  });\n  var noRebufferingPlaylists = rebufferingEstimates.filter(function (estimate) {\n    return estimate.rebufferingImpact <= 0;\n  }); // Sort by bandwidth DESC\n\n  stableSort(noRebufferingPlaylists, function (a, b) {\n    return comparePlaylistBandwidth(b.playlist, a.playlist);\n  });\n\n  if (noRebufferingPlaylists.length) {\n    return noRebufferingPlaylists[0];\n  }\n\n  stableSort(rebufferingEstimates, function (a, b) {\n    return a.rebufferingImpact - b.rebufferingImpact;\n  });\n  return rebufferingEstimates[0] || null;\n};\n/**\n * Chooses the appropriate media playlist, which in this case is the lowest bitrate\n * one with video.  If no renditions with video exist, return the lowest audio rendition.\n *\n * Expects to be called within the context of an instance of VhsHandler\n *\n * @return {Object|null}\n *         {Object} return.playlist\n *         The lowest bitrate playlist that contains a video codec.  If no such rendition\n *         exists pick the lowest audio rendition.\n */\n\n\nvar lowestBitrateCompatibleVariantSelector = function lowestBitrateCompatibleVariantSelector() {\n  var _this = this; // filter out any playlists that have been excluded due to\n  // incompatible configurations or playback errors\n\n\n  var playlists = this.playlists.master.playlists.filter(Playlist.isEnabled); // Sort ascending by bitrate\n\n  stableSort(playlists, function (a, b) {\n    return comparePlaylistBandwidth(a, b);\n  }); // Parse and assume that playlists with no video codec have no video\n  // (this is not necessarily true, although it is generally true).\n  //\n  // If an entire manifest has no valid videos everything will get filtered\n  // out.\n\n  var playlistsWithVideo = playlists.filter(function (playlist) {\n    return !!codecsForPlaylist(_this.playlists.master, playlist).video;\n  });\n  return playlistsWithVideo[0] || null;\n};\n/**\n * Combine all segments into a single Uint8Array\n *\n * @param {Object} segmentObj\n * @return {Uint8Array} concatenated bytes\n * @private\n */\n\n\nvar concatSegments = function concatSegments(segmentObj) {\n  var offset = 0;\n  var tempBuffer;\n\n  if (segmentObj.bytes) {\n    tempBuffer = new Uint8Array(segmentObj.bytes); // combine the individual segments into one large typed-array\n\n    segmentObj.segments.forEach(function (segment) {\n      tempBuffer.set(segment, offset);\n      offset += segment.byteLength;\n    });\n  }\n\n  return tempBuffer;\n};\n/**\n * @file text-tracks.js\n */\n\n/**\n * Create captions text tracks on video.js if they do not exist\n *\n * @param {Object} inbandTextTracks a reference to current inbandTextTracks\n * @param {Object} tech the video.js tech\n * @param {Object} captionStream the caption stream to create\n * @private\n */\n\n\nvar createCaptionsTrackIfNotExists = function createCaptionsTrackIfNotExists(inbandTextTracks, tech, captionStream) {\n  if (!inbandTextTracks[captionStream]) {\n    tech.trigger({\n      type: 'usage',\n      name: 'vhs-608'\n    });\n    tech.trigger({\n      type: 'usage',\n      name: 'hls-608'\n    });\n    var instreamId = captionStream; // we need to translate SERVICEn for 708 to how mux.js currently labels them\n\n    if (/^cc708_/.test(captionStream)) {\n      instreamId = 'SERVICE' + captionStream.split('_')[1];\n    }\n\n    var track = tech.textTracks().getTrackById(instreamId);\n\n    if (track) {\n      // Resuse an existing track with a CC# id because this was\n      // very likely created by videojs-contrib-hls from information\n      // in the m3u8 for us to use\n      inbandTextTracks[captionStream] = track;\n    } else {\n      // This section gets called when we have caption services that aren't specified in the manifest.\n      // Manifest level caption services are handled in media-groups.js under CLOSED-CAPTIONS.\n      var captionServices = tech.options_.vhs && tech.options_.vhs.captionServices || {};\n      var label = captionStream;\n      var language = captionStream;\n      var def = false;\n      var captionService = captionServices[instreamId];\n\n      if (captionService) {\n        label = captionService.label;\n        language = captionService.language;\n        def = captionService[\"default\"];\n      } // Otherwise, create a track with the default `CC#` label and\n      // without a language\n\n\n      inbandTextTracks[captionStream] = tech.addRemoteTextTrack({\n        kind: 'captions',\n        id: instreamId,\n        // TODO: investigate why this doesn't seem to turn the caption on by default\n        \"default\": def,\n        label: label,\n        language: language\n      }, false).track;\n    }\n  }\n};\n/**\n * Add caption text track data to a source handler given an array of captions\n *\n * @param {Object}\n *   @param {Object} inbandTextTracks the inband text tracks\n *   @param {number} timestampOffset the timestamp offset of the source buffer\n *   @param {Array} captionArray an array of caption data\n * @private\n */\n\n\nvar addCaptionData = function addCaptionData(_ref) {\n  var inbandTextTracks = _ref.inbandTextTracks,\n      captionArray = _ref.captionArray,\n      timestampOffset = _ref.timestampOffset;\n\n  if (!captionArray) {\n    return;\n  }\n\n  var Cue = window$1.WebKitDataCue || window$1.VTTCue;\n  captionArray.forEach(function (caption) {\n    var track = caption.stream;\n    inbandTextTracks[track].addCue(new Cue(caption.startTime + timestampOffset, caption.endTime + timestampOffset, caption.text));\n  });\n};\n/**\n * Define properties on a cue for backwards compatability,\n * but warn the user that the way that they are using it\n * is depricated and will be removed at a later date.\n *\n * @param {Cue} cue the cue to add the properties on\n * @private\n */\n\n\nvar deprecateOldCue = function deprecateOldCue(cue) {\n  Object.defineProperties(cue.frame, {\n    id: {\n      get: function get() {\n        videojs.log.warn('cue.frame.id is deprecated. Use cue.value.key instead.');\n        return cue.value.key;\n      }\n    },\n    value: {\n      get: function get() {\n        videojs.log.warn('cue.frame.value is deprecated. Use cue.value.data instead.');\n        return cue.value.data;\n      }\n    },\n    privateData: {\n      get: function get() {\n        videojs.log.warn('cue.frame.privateData is deprecated. Use cue.value.data instead.');\n        return cue.value.data;\n      }\n    }\n  });\n};\n/**\n * Add metadata text track data to a source handler given an array of metadata\n *\n * @param {Object}\n *   @param {Object} inbandTextTracks the inband text tracks\n *   @param {Array} metadataArray an array of meta data\n *   @param {number} timestampOffset the timestamp offset of the source buffer\n *   @param {number} videoDuration the duration of the video\n * @private\n */\n\n\nvar addMetadata = function addMetadata(_ref2) {\n  var inbandTextTracks = _ref2.inbandTextTracks,\n      metadataArray = _ref2.metadataArray,\n      timestampOffset = _ref2.timestampOffset,\n      videoDuration = _ref2.videoDuration;\n\n  if (!metadataArray) {\n    return;\n  }\n\n  var Cue = window$1.WebKitDataCue || window$1.VTTCue;\n  var metadataTrack = inbandTextTracks.metadataTrack_;\n\n  if (!metadataTrack) {\n    return;\n  }\n\n  metadataArray.forEach(function (metadata) {\n    var time = metadata.cueTime + timestampOffset; // if time isn't a finite number between 0 and Infinity, like NaN,\n    // ignore this bit of metadata.\n    // This likely occurs when you have an non-timed ID3 tag like TIT2,\n    // which is the \"Title/Songname/Content description\" frame\n\n    if (typeof time !== 'number' || window$1.isNaN(time) || time < 0 || !(time < Infinity)) {\n      return;\n    }\n\n    metadata.frames.forEach(function (frame) {\n      var cue = new Cue(time, time, frame.value || frame.url || frame.data || '');\n      cue.frame = frame;\n      cue.value = frame;\n      deprecateOldCue(cue);\n      metadataTrack.addCue(cue);\n    });\n  });\n\n  if (!metadataTrack.cues || !metadataTrack.cues.length) {\n    return;\n  } // Updating the metadeta cues so that\n  // the endTime of each cue is the startTime of the next cue\n  // the endTime of last cue is the duration of the video\n\n\n  var cues = metadataTrack.cues;\n  var cuesArray = []; // Create a copy of the TextTrackCueList...\n  // ...disregarding cues with a falsey value\n\n  for (var i = 0; i < cues.length; i++) {\n    if (cues[i]) {\n      cuesArray.push(cues[i]);\n    }\n  } // Group cues by their startTime value\n\n\n  var cuesGroupedByStartTime = cuesArray.reduce(function (obj, cue) {\n    var timeSlot = obj[cue.startTime] || [];\n    timeSlot.push(cue);\n    obj[cue.startTime] = timeSlot;\n    return obj;\n  }, {}); // Sort startTimes by ascending order\n\n  var sortedStartTimes = Object.keys(cuesGroupedByStartTime).sort(function (a, b) {\n    return Number(a) - Number(b);\n  }); // Map each cue group's endTime to the next group's startTime\n\n  sortedStartTimes.forEach(function (startTime, idx) {\n    var cueGroup = cuesGroupedByStartTime[startTime];\n    var nextTime = Number(sortedStartTimes[idx + 1]) || videoDuration; // Map each cue's endTime the next group's startTime\n\n    cueGroup.forEach(function (cue) {\n      cue.endTime = nextTime;\n    });\n  });\n};\n/**\n * Create metadata text track on video.js if it does not exist\n *\n * @param {Object} inbandTextTracks a reference to current inbandTextTracks\n * @param {string} dispatchType the inband metadata track dispatch type\n * @param {Object} tech the video.js tech\n * @private\n */\n\n\nvar createMetadataTrackIfNotExists = function createMetadataTrackIfNotExists(inbandTextTracks, dispatchType, tech) {\n  if (inbandTextTracks.metadataTrack_) {\n    return;\n  }\n\n  inbandTextTracks.metadataTrack_ = tech.addRemoteTextTrack({\n    kind: 'metadata',\n    label: 'Timed Metadata'\n  }, false).track;\n  inbandTextTracks.metadataTrack_.inBandMetadataTrackDispatchType = dispatchType;\n};\n/**\n * Remove cues from a track on video.js.\n *\n * @param {Double} start start of where we should remove the cue\n * @param {Double} end end of where the we should remove the cue\n * @param {Object} track the text track to remove the cues from\n * @private\n */\n\n\nvar removeCuesFromTrack = function removeCuesFromTrack(start, end, track) {\n  var i;\n  var cue;\n\n  if (!track) {\n    return;\n  }\n\n  if (!track.cues) {\n    return;\n  }\n\n  i = track.cues.length;\n\n  while (i--) {\n    cue = track.cues[i]; // Remove any cue within the provided start and end time\n\n    if (cue.startTime >= start && cue.endTime <= end) {\n      track.removeCue(cue);\n    }\n  }\n};\n/**\n * Remove duplicate cues from a track on video.js (a cue is considered a\n * duplicate if it has the same time interval and text as another)\n *\n * @param {Object} track the text track to remove the duplicate cues from\n * @private\n */\n\n\nvar removeDuplicateCuesFromTrack = function removeDuplicateCuesFromTrack(track) {\n  var cues = track.cues;\n\n  if (!cues) {\n    return;\n  }\n\n  for (var i = 0; i < cues.length; i++) {\n    var duplicates = [];\n    var occurrences = 0;\n\n    for (var j = 0; j < cues.length; j++) {\n      if (cues[i].startTime === cues[j].startTime && cues[i].endTime === cues[j].endTime && cues[i].text === cues[j].text) {\n        occurrences++;\n\n        if (occurrences > 1) {\n          duplicates.push(cues[j]);\n        }\n      }\n    }\n\n    if (duplicates.length) {\n      duplicates.forEach(function (dupe) {\n        return track.removeCue(dupe);\n      });\n    }\n  }\n};\n/**\n * Returns a list of gops in the buffer that have a pts value of 3 seconds or more in\n * front of current time.\n *\n * @param {Array} buffer\n *        The current buffer of gop information\n * @param {number} currentTime\n *        The current time\n * @param {Double} mapping\n *        Offset to map display time to stream presentation time\n * @return {Array}\n *         List of gops considered safe to append over\n */\n\n\nvar gopsSafeToAlignWith = function gopsSafeToAlignWith(buffer, currentTime, mapping) {\n  if (typeof currentTime === 'undefined' || currentTime === null || !buffer.length) {\n    return [];\n  } // pts value for current time + 3 seconds to give a bit more wiggle room\n\n\n  var currentTimePts = Math.ceil((currentTime - mapping + 3) * ONE_SECOND_IN_TS);\n  var i;\n\n  for (i = 0; i < buffer.length; i++) {\n    if (buffer[i].pts > currentTimePts) {\n      break;\n    }\n  }\n\n  return buffer.slice(i);\n};\n/**\n * Appends gop information (timing and byteLength) received by the transmuxer for the\n * gops appended in the last call to appendBuffer\n *\n * @param {Array} buffer\n *        The current buffer of gop information\n * @param {Array} gops\n *        List of new gop information\n * @param {boolean} replace\n *        If true, replace the buffer with the new gop information. If false, append the\n *        new gop information to the buffer in the right location of time.\n * @return {Array}\n *         Updated list of gop information\n */\n\n\nvar updateGopBuffer = function updateGopBuffer(buffer, gops, replace) {\n  if (!gops.length) {\n    return buffer;\n  }\n\n  if (replace) {\n    // If we are in safe append mode, then completely overwrite the gop buffer\n    // with the most recent appeneded data. This will make sure that when appending\n    // future segments, we only try to align with gops that are both ahead of current\n    // time and in the last segment appended.\n    return gops.slice();\n  }\n\n  var start = gops[0].pts;\n  var i = 0;\n\n  for (i; i < buffer.length; i++) {\n    if (buffer[i].pts >= start) {\n      break;\n    }\n  }\n\n  return buffer.slice(0, i).concat(gops);\n};\n/**\n * Removes gop information in buffer that overlaps with provided start and end\n *\n * @param {Array} buffer\n *        The current buffer of gop information\n * @param {Double} start\n *        position to start the remove at\n * @param {Double} end\n *        position to end the remove at\n * @param {Double} mapping\n *        Offset to map display time to stream presentation time\n */\n\n\nvar removeGopBuffer = function removeGopBuffer(buffer, start, end, mapping) {\n  var startPts = Math.ceil((start - mapping) * ONE_SECOND_IN_TS);\n  var endPts = Math.ceil((end - mapping) * ONE_SECOND_IN_TS);\n  var updatedBuffer = buffer.slice();\n  var i = buffer.length;\n\n  while (i--) {\n    if (buffer[i].pts <= endPts) {\n      break;\n    }\n  }\n\n  if (i === -1) {\n    // no removal because end of remove range is before start of buffer\n    return updatedBuffer;\n  }\n\n  var j = i + 1;\n\n  while (j--) {\n    if (buffer[j].pts <= startPts) {\n      break;\n    }\n  } // clamp remove range start to 0 index\n\n\n  j = Math.max(j, 0);\n  updatedBuffer.splice(j, i - j + 1);\n  return updatedBuffer;\n};\n\nvar shallowEqual = function shallowEqual(a, b) {\n  // if both are undefined\n  // or one or the other is undefined\n  // they are not equal\n  if (!a && !b || !a && b || a && !b) {\n    return false;\n  } // they are the same object and thus, equal\n\n\n  if (a === b) {\n    return true;\n  } // sort keys so we can make sure they have\n  // all the same keys later.\n\n\n  var akeys = Object.keys(a).sort();\n  var bkeys = Object.keys(b).sort(); // different number of keys, not equal\n\n  if (akeys.length !== bkeys.length) {\n    return false;\n  }\n\n  for (var i = 0; i < akeys.length; i++) {\n    var key = akeys[i]; // different sorted keys, not equal\n\n    if (key !== bkeys[i]) {\n      return false;\n    } // different values, not equal\n\n\n    if (a[key] !== b[key]) {\n      return false;\n    }\n  }\n\n  return true;\n}; // https://www.w3.org/TR/WebIDL-1/#quotaexceedederror\n\n\nvar QUOTA_EXCEEDED_ERR = 22;\n/**\n * The segment loader has no recourse except to fetch a segment in the\n * current playlist and use the internal timestamps in that segment to\n * generate a syncPoint. This function returns a good candidate index\n * for that process.\n *\n * @param {Array} segments - the segments array from a playlist.\n * @return {number} An index of a segment from the playlist to load\n */\n\nvar getSyncSegmentCandidate = function getSyncSegmentCandidate(currentTimeline, segments, targetTime) {\n  segments = segments || [];\n  var timelineSegments = [];\n  var time = 0;\n\n  for (var i = 0; i < segments.length; i++) {\n    var segment = segments[i];\n\n    if (currentTimeline === segment.timeline) {\n      timelineSegments.push(i);\n      time += segment.duration;\n\n      if (time > targetTime) {\n        return i;\n      }\n    }\n  }\n\n  if (timelineSegments.length === 0) {\n    return 0;\n  } // default to the last timeline segment\n\n\n  return timelineSegments[timelineSegments.length - 1];\n}; // In the event of a quota exceeded error, keep at least one second of back buffer. This\n// number was arbitrarily chosen and may be updated in the future, but seemed reasonable\n// as a start to prevent any potential issues with removing content too close to the\n// playhead.\n\n\nvar MIN_BACK_BUFFER = 1; // in ms\n\nvar CHECK_BUFFER_DELAY = 500;\n\nvar finite = function finite(num) {\n  return typeof num === 'number' && isFinite(num);\n}; // With most content hovering around 30fps, if a segment has a duration less than a half\n// frame at 30fps or one frame at 60fps, the bandwidth and throughput calculations will\n// not accurately reflect the rest of the content.\n\n\nvar MIN_SEGMENT_DURATION_TO_SAVE_STATS = 1 / 60;\n\nvar illegalMediaSwitch = function illegalMediaSwitch(loaderType, startingMedia, trackInfo) {\n  // Although these checks should most likely cover non 'main' types, for now it narrows\n  // the scope of our checks.\n  if (loaderType !== 'main' || !startingMedia || !trackInfo) {\n    return null;\n  }\n\n  if (!trackInfo.hasAudio && !trackInfo.hasVideo) {\n    return 'Neither audio nor video found in segment.';\n  }\n\n  if (startingMedia.hasVideo && !trackInfo.hasVideo) {\n    return 'Only audio found in segment when we expected video.' + ' We can\\'t switch to audio only from a stream that had video.' + ' To get rid of this message, please add codec information to the manifest.';\n  }\n\n  if (!startingMedia.hasVideo && trackInfo.hasVideo) {\n    return 'Video found in segment when we expected only audio.' + ' We can\\'t switch to a stream with video from an audio only stream.' + ' To get rid of this message, please add codec information to the manifest.';\n  }\n\n  return null;\n};\n/**\n * Calculates a time value that is safe to remove from the back buffer without interrupting\n * playback.\n *\n * @param {TimeRange} seekable\n *        The current seekable range\n * @param {number} currentTime\n *        The current time of the player\n * @param {number} targetDuration\n *        The target duration of the current playlist\n * @return {number}\n *         Time that is safe to remove from the back buffer without interrupting playback\n */\n\n\nvar safeBackBufferTrimTime = function safeBackBufferTrimTime(seekable, currentTime, targetDuration) {\n  // 30 seconds before the playhead provides a safe default for trimming.\n  //\n  // Choosing a reasonable default is particularly important for high bitrate content and\n  // VOD videos/live streams with large windows, as the buffer may end up overfilled and\n  // throw an APPEND_BUFFER_ERR.\n  var trimTime = currentTime - Config.BACK_BUFFER_LENGTH;\n\n  if (seekable.length) {\n    // Some live playlists may have a shorter window of content than the full allowed back\n    // buffer. For these playlists, don't save content that's no longer within the window.\n    trimTime = Math.max(trimTime, seekable.start(0));\n  } // Don't remove within target duration of the current time to avoid the possibility of\n  // removing the GOP currently being played, as removing it can cause playback stalls.\n\n\n  var maxTrimTime = currentTime - targetDuration;\n  return Math.min(maxTrimTime, trimTime);\n};\n\nvar segmentInfoString = function segmentInfoString(segmentInfo) {\n  var startOfSegment = segmentInfo.startOfSegment,\n      duration = segmentInfo.duration,\n      segment = segmentInfo.segment,\n      part = segmentInfo.part,\n      _segmentInfo$playlist = segmentInfo.playlist,\n      seq = _segmentInfo$playlist.mediaSequence,\n      id = _segmentInfo$playlist.id,\n      _segmentInfo$playlist2 = _segmentInfo$playlist.segments,\n      segments = _segmentInfo$playlist2 === void 0 ? [] : _segmentInfo$playlist2,\n      index = segmentInfo.mediaIndex,\n      partIndex = segmentInfo.partIndex,\n      timeline = segmentInfo.timeline;\n  var segmentLen = segments.length - 1;\n  var selection = 'mediaIndex/partIndex increment';\n\n  if (segmentInfo.getMediaInfoForTime) {\n    selection = \"getMediaInfoForTime (\" + segmentInfo.getMediaInfoForTime + \")\";\n  } else if (segmentInfo.isSyncRequest) {\n    selection = 'getSyncSegmentCandidate (isSyncRequest)';\n  }\n\n  if (segmentInfo.independent) {\n    selection += \" with independent \" + segmentInfo.independent;\n  }\n\n  var hasPartIndex = typeof partIndex === 'number';\n  var name = segmentInfo.segment.uri ? 'segment' : 'pre-segment';\n  var zeroBasedPartCount = hasPartIndex ? getKnownPartCount({\n    preloadSegment: segment\n  }) - 1 : 0;\n  return name + \" [\" + (seq + index) + \"/\" + (seq + segmentLen) + \"]\" + (hasPartIndex ? \" part [\" + partIndex + \"/\" + zeroBasedPartCount + \"]\" : '') + (\" segment start/end [\" + segment.start + \" => \" + segment.end + \"]\") + (hasPartIndex ? \" part start/end [\" + part.start + \" => \" + part.end + \"]\" : '') + (\" startOfSegment [\" + startOfSegment + \"]\") + (\" duration [\" + duration + \"]\") + (\" timeline [\" + timeline + \"]\") + (\" selected by [\" + selection + \"]\") + (\" playlist [\" + id + \"]\");\n};\n\nvar timingInfoPropertyForMedia = function timingInfoPropertyForMedia(mediaType) {\n  return mediaType + \"TimingInfo\";\n};\n/**\n * Returns the timestamp offset to use for the segment.\n *\n * @param {number} segmentTimeline\n *        The timeline of the segment\n * @param {number} currentTimeline\n *        The timeline currently being followed by the loader\n * @param {number} startOfSegment\n *        The estimated segment start\n * @param {TimeRange[]} buffered\n *        The loader's buffer\n * @param {boolean} overrideCheck\n *        If true, no checks are made to see if the timestamp offset value should be set,\n *        but sets it directly to a value.\n *\n * @return {number|null}\n *         Either a number representing a new timestamp offset, or null if the segment is\n *         part of the same timeline\n */\n\n\nvar timestampOffsetForSegment = function timestampOffsetForSegment(_ref) {\n  var segmentTimeline = _ref.segmentTimeline,\n      currentTimeline = _ref.currentTimeline,\n      startOfSegment = _ref.startOfSegment,\n      buffered = _ref.buffered,\n      overrideCheck = _ref.overrideCheck; // Check to see if we are crossing a discontinuity to see if we need to set the\n  // timestamp offset on the transmuxer and source buffer.\n  //\n  // Previously, we changed the timestampOffset if the start of this segment was less than\n  // the currently set timestampOffset, but this isn't desirable as it can produce bad\n  // behavior, especially around long running live streams.\n\n  if (!overrideCheck && segmentTimeline === currentTimeline) {\n    return null;\n  } // When changing renditions, it's possible to request a segment on an older timeline. For\n  // instance, given two renditions with the following:\n  //\n  // #EXTINF:10\n  // segment1\n  // #EXT-X-DISCONTINUITY\n  // #EXTINF:10\n  // segment2\n  // #EXTINF:10\n  // segment3\n  //\n  // And the current player state:\n  //\n  // current time: 8\n  // buffer: 0 => 20\n  //\n  // The next segment on the current rendition would be segment3, filling the buffer from\n  // 20s onwards. However, if a rendition switch happens after segment2 was requested,\n  // then the next segment to be requested will be segment1 from the new rendition in\n  // order to fill time 8 and onwards. Using the buffered end would result in repeated\n  // content (since it would position segment1 of the new rendition starting at 20s). This\n  // case can be identified when the new segment's timeline is a prior value. Instead of\n  // using the buffered end, the startOfSegment can be used, which, hopefully, will be\n  // more accurate to the actual start time of the segment.\n\n\n  if (segmentTimeline < currentTimeline) {\n    return startOfSegment;\n  } // segmentInfo.startOfSegment used to be used as the timestamp offset, however, that\n  // value uses the end of the last segment if it is available. While this value\n  // should often be correct, it's better to rely on the buffered end, as the new\n  // content post discontinuity should line up with the buffered end as if it were\n  // time 0 for the new content.\n\n\n  return buffered.length ? buffered.end(buffered.length - 1) : startOfSegment;\n};\n/**\n * Returns whether or not the loader should wait for a timeline change from the timeline\n * change controller before processing the segment.\n *\n * Primary timing in VHS goes by video. This is different from most media players, as\n * audio is more often used as the primary timing source. For the foreseeable future, VHS\n * will continue to use video as the primary timing source, due to the current logic and\n * expectations built around it.\n\n * Since the timing follows video, in order to maintain sync, the video loader is\n * responsible for setting both audio and video source buffer timestamp offsets.\n *\n * Setting different values for audio and video source buffers could lead to\n * desyncing. The following examples demonstrate some of the situations where this\n * distinction is important. Note that all of these cases involve demuxed content. When\n * content is muxed, the audio and video are packaged together, therefore syncing\n * separate media playlists is not an issue.\n *\n * CASE 1: Audio prepares to load a new timeline before video:\n *\n * Timeline:       0                 1\n * Audio Segments: 0 1 2 3 4 5 DISCO 6 7 8 9\n * Audio Loader:                     ^\n * Video Segments: 0 1 2 3 4 5 DISCO 6 7 8 9\n * Video Loader              ^\n *\n * In the above example, the audio loader is preparing to load the 6th segment, the first\n * after a discontinuity, while the video loader is still loading the 5th segment, before\n * the discontinuity.\n *\n * If the audio loader goes ahead and loads and appends the 6th segment before the video\n * loader crosses the discontinuity, then when appended, the 6th audio segment will use\n * the timestamp offset from timeline 0. This will likely lead to desyncing. In addition,\n * the audio loader must provide the audioAppendStart value to trim the content in the\n * transmuxer, and that value relies on the audio timestamp offset. Since the audio\n * timestamp offset is set by the video (main) loader, the audio loader shouldn't load the\n * segment until that value is provided.\n *\n * CASE 2: Video prepares to load a new timeline before audio:\n *\n * Timeline:       0                 1\n * Audio Segments: 0 1 2 3 4 5 DISCO 6 7 8 9\n * Audio Loader:             ^\n * Video Segments: 0 1 2 3 4 5 DISCO 6 7 8 9\n * Video Loader                      ^\n *\n * In the above example, the video loader is preparing to load the 6th segment, the first\n * after a discontinuity, while the audio loader is still loading the 5th segment, before\n * the discontinuity.\n *\n * If the video loader goes ahead and loads and appends the 6th segment, then once the\n * segment is loaded and processed, both the video and audio timestamp offsets will be\n * set, since video is used as the primary timing source. This is to ensure content lines\n * up appropriately, as any modifications to the video timing are reflected by audio when\n * the video loader sets the audio and video timestamp offsets to the same value. However,\n * setting the timestamp offset for audio before audio has had a chance to change\n * timelines will likely lead to desyncing, as the audio loader will append segment 5 with\n * a timestamp intended to apply to segments from timeline 1 rather than timeline 0.\n *\n * CASE 3: When seeking, audio prepares to load a new timeline before video\n *\n * Timeline:       0                 1\n * Audio Segments: 0 1 2 3 4 5 DISCO 6 7 8 9\n * Audio Loader:           ^\n * Video Segments: 0 1 2 3 4 5 DISCO 6 7 8 9\n * Video Loader            ^\n *\n * In the above example, both audio and video loaders are loading segments from timeline\n * 0, but imagine that the seek originated from timeline 1.\n *\n * When seeking to a new timeline, the timestamp offset will be set based on the expected\n * segment start of the loaded video segment. In order to maintain sync, the audio loader\n * must wait for the video loader to load its segment and update both the audio and video\n * timestamp offsets before it may load and append its own segment. This is the case\n * whether the seek results in a mismatched segment request (e.g., the audio loader\n * chooses to load segment 3 and the video loader chooses to load segment 4) or the\n * loaders choose to load the same segment index from each playlist, as the segments may\n * not be aligned perfectly, even for matching segment indexes.\n *\n * @param {Object} timelinechangeController\n * @param {number} currentTimeline\n *        The timeline currently being followed by the loader\n * @param {number} segmentTimeline\n *        The timeline of the segment being loaded\n * @param {('main'|'audio')} loaderType\n *        The loader type\n * @param {boolean} audioDisabled\n *        Whether the audio is disabled for the loader. This should only be true when the\n *        loader may have muxed audio in its segment, but should not append it, e.g., for\n *        the main loader when an alternate audio playlist is active.\n *\n * @return {boolean}\n *         Whether the loader should wait for a timeline change from the timeline change\n *         controller before processing the segment\n */\n\n\nvar shouldWaitForTimelineChange = function shouldWaitForTimelineChange(_ref2) {\n  var timelineChangeController = _ref2.timelineChangeController,\n      currentTimeline = _ref2.currentTimeline,\n      segmentTimeline = _ref2.segmentTimeline,\n      loaderType = _ref2.loaderType,\n      audioDisabled = _ref2.audioDisabled;\n\n  if (currentTimeline === segmentTimeline) {\n    return false;\n  }\n\n  if (loaderType === 'audio') {\n    var lastMainTimelineChange = timelineChangeController.lastTimelineChange({\n      type: 'main'\n    }); // Audio loader should wait if:\n    //\n    // * main hasn't had a timeline change yet (thus has not loaded its first segment)\n    // * main hasn't yet changed to the timeline audio is looking to load\n\n    return !lastMainTimelineChange || lastMainTimelineChange.to !== segmentTimeline;\n  } // The main loader only needs to wait for timeline changes if there's demuxed audio.\n  // Otherwise, there's nothing to wait for, since audio would be muxed into the main\n  // loader's segments (or the content is audio/video only and handled by the main\n  // loader).\n\n\n  if (loaderType === 'main' && audioDisabled) {\n    var pendingAudioTimelineChange = timelineChangeController.pendingTimelineChange({\n      type: 'audio'\n    }); // Main loader should wait for the audio loader if audio is not pending a timeline\n    // change to the current timeline.\n    //\n    // Since the main loader is responsible for setting the timestamp offset for both\n    // audio and video, the main loader must wait for audio to be about to change to its\n    // timeline before setting the offset, otherwise, if audio is behind in loading,\n    // segments from the previous timeline would be adjusted by the new timestamp offset.\n    //\n    // This requirement means that video will not cross a timeline until the audio is\n    // about to cross to it, so that way audio and video will always cross the timeline\n    // together.\n    //\n    // In addition to normal timeline changes, these rules also apply to the start of a\n    // stream (going from a non-existent timeline, -1, to timeline 0). It's important\n    // that these rules apply to the first timeline change because if they did not, it's\n    // possible that the main loader will cross two timelines before the audio loader has\n    // crossed one. Logic may be implemented to handle the startup as a special case, but\n    // it's easier to simply treat all timeline changes the same.\n\n    if (pendingAudioTimelineChange && pendingAudioTimelineChange.to === segmentTimeline) {\n      return false;\n    }\n\n    return true;\n  }\n\n  return false;\n};\n\nvar mediaDuration = function mediaDuration(timingInfos) {\n  var maxDuration = 0;\n  ['video', 'audio'].forEach(function (type) {\n    var typeTimingInfo = timingInfos[type + \"TimingInfo\"];\n\n    if (!typeTimingInfo) {\n      return;\n    }\n\n    var start = typeTimingInfo.start,\n        end = typeTimingInfo.end;\n    var duration;\n\n    if (typeof start === 'bigint' || typeof end === 'bigint') {\n      duration = window$1.BigInt(end) - window$1.BigInt(start);\n    } else if (typeof start === 'number' && typeof end === 'number') {\n      duration = end - start;\n    }\n\n    if (typeof duration !== 'undefined' && duration > maxDuration) {\n      maxDuration = duration;\n    }\n  }); // convert back to a number if it is lower than MAX_SAFE_INTEGER\n  // as we only need BigInt when we are above that.\n\n  if (typeof maxDuration === 'bigint' && maxDuration < Number.MAX_SAFE_INTEGER) {\n    maxDuration = Number(maxDuration);\n  }\n\n  return maxDuration;\n};\n\nvar segmentTooLong = function segmentTooLong(_ref3) {\n  var segmentDuration = _ref3.segmentDuration,\n      maxDuration = _ref3.maxDuration; // 0 duration segments are most likely due to metadata only segments or a lack of\n  // information.\n\n  if (!segmentDuration) {\n    return false;\n  } // For HLS:\n  //\n  // https://tools.ietf.org/html/draft-pantos-http-live-streaming-23#section-4.3.3.1\n  // The EXTINF duration of each Media Segment in the Playlist\n  // file, when rounded to the nearest integer, MUST be less than or equal\n  // to the target duration; longer segments can trigger playback stalls\n  // or other errors.\n  //\n  // For DASH, the mpd-parser uses the largest reported segment duration as the target\n  // duration. Although that reported duration is occasionally approximate (i.e., not\n  // exact), a strict check may report that a segment is too long more often in DASH.\n\n\n  return Math.round(segmentDuration) > maxDuration + TIME_FUDGE_FACTOR;\n};\n\nvar getTroublesomeSegmentDurationMessage = function getTroublesomeSegmentDurationMessage(segmentInfo, sourceType) {\n  // Right now we aren't following DASH's timing model exactly, so only perform\n  // this check for HLS content.\n  if (sourceType !== 'hls') {\n    return null;\n  }\n\n  var segmentDuration = mediaDuration({\n    audioTimingInfo: segmentInfo.audioTimingInfo,\n    videoTimingInfo: segmentInfo.videoTimingInfo\n  }); // Don't report if we lack information.\n  //\n  // If the segment has a duration of 0 it is either a lack of information or a\n  // metadata only segment and shouldn't be reported here.\n\n  if (!segmentDuration) {\n    return null;\n  }\n\n  var targetDuration = segmentInfo.playlist.targetDuration;\n  var isSegmentWayTooLong = segmentTooLong({\n    segmentDuration: segmentDuration,\n    maxDuration: targetDuration * 2\n  });\n  var isSegmentSlightlyTooLong = segmentTooLong({\n    segmentDuration: segmentDuration,\n    maxDuration: targetDuration\n  });\n  var segmentTooLongMessage = \"Segment with index \" + segmentInfo.mediaIndex + \" \" + (\"from playlist \" + segmentInfo.playlist.id + \" \") + (\"has a duration of \" + segmentDuration + \" \") + (\"when the reported duration is \" + segmentInfo.duration + \" \") + (\"and the target duration is \" + targetDuration + \". \") + 'For HLS content, a duration in excess of the target duration may result in ' + 'playback issues. See the HLS specification section on EXT-X-TARGETDURATION for ' + 'more details: ' + 'https://tools.ietf.org/html/draft-pantos-http-live-streaming-23#section-4.3.3.1';\n\n  if (isSegmentWayTooLong || isSegmentSlightlyTooLong) {\n    return {\n      severity: isSegmentWayTooLong ? 'warn' : 'info',\n      message: segmentTooLongMessage\n    };\n  }\n\n  return null;\n};\n/**\n * An object that manages segment loading and appending.\n *\n * @class SegmentLoader\n * @param {Object} options required and optional options\n * @extends videojs.EventTarget\n */\n\n\nvar SegmentLoader = /*#__PURE__*/function (_videojs$EventTarget) {\n  _inheritsLoose(SegmentLoader, _videojs$EventTarget);\n\n  function SegmentLoader(settings, options) {\n    var _this;\n\n    _this = _videojs$EventTarget.call(this) || this; // check pre-conditions\n\n    if (!settings) {\n      throw new TypeError('Initialization settings are required');\n    }\n\n    if (typeof settings.currentTime !== 'function') {\n      throw new TypeError('No currentTime getter specified');\n    }\n\n    if (!settings.mediaSource) {\n      throw new TypeError('No MediaSource specified');\n    } // public properties\n\n\n    _this.bandwidth = settings.bandwidth;\n    _this.throughput = {\n      rate: 0,\n      count: 0\n    };\n    _this.roundTrip = NaN;\n\n    _this.resetStats_();\n\n    _this.mediaIndex = null;\n    _this.partIndex = null; // private settings\n\n    _this.hasPlayed_ = settings.hasPlayed;\n    _this.currentTime_ = settings.currentTime;\n    _this.seekable_ = settings.seekable;\n    _this.seeking_ = settings.seeking;\n    _this.duration_ = settings.duration;\n    _this.mediaSource_ = settings.mediaSource;\n    _this.vhs_ = settings.vhs;\n    _this.loaderType_ = settings.loaderType;\n    _this.currentMediaInfo_ = void 0;\n    _this.startingMediaInfo_ = void 0;\n    _this.segmentMetadataTrack_ = settings.segmentMetadataTrack;\n    _this.goalBufferLength_ = settings.goalBufferLength;\n    _this.sourceType_ = settings.sourceType;\n    _this.sourceUpdater_ = settings.sourceUpdater;\n    _this.inbandTextTracks_ = settings.inbandTextTracks;\n    _this.state_ = 'INIT';\n    _this.timelineChangeController_ = settings.timelineChangeController;\n    _this.shouldSaveSegmentTimingInfo_ = true;\n    _this.parse708captions_ = settings.parse708captions;\n    _this.captionServices_ = settings.captionServices;\n    _this.experimentalExactManifestTimings = settings.experimentalExactManifestTimings; // private instance variables\n\n    _this.checkBufferTimeout_ = null;\n    _this.error_ = void 0;\n    _this.currentTimeline_ = -1;\n    _this.pendingSegment_ = null;\n    _this.xhrOptions_ = null;\n    _this.pendingSegments_ = [];\n    _this.audioDisabled_ = false;\n    _this.isPendingTimestampOffset_ = false; // TODO possibly move gopBuffer and timeMapping info to a separate controller\n\n    _this.gopBuffer_ = [];\n    _this.timeMapping_ = 0;\n    _this.safeAppend_ = videojs.browser.IE_VERSION >= 11;\n    _this.appendInitSegment_ = {\n      audio: true,\n      video: true\n    };\n    _this.playlistOfLastInitSegment_ = {\n      audio: null,\n      video: null\n    };\n    _this.callQueue_ = []; // If the segment loader prepares to load a segment, but does not have enough\n    // information yet to start the loading process (e.g., if the audio loader wants to\n    // load a segment from the next timeline but the main loader hasn't yet crossed that\n    // timeline), then the load call will be added to the queue until it is ready to be\n    // processed.\n\n    _this.loadQueue_ = [];\n    _this.metadataQueue_ = {\n      id3: [],\n      caption: []\n    };\n    _this.waitingOnRemove_ = false;\n    _this.quotaExceededErrorRetryTimeout_ = null; // Fragmented mp4 playback\n\n    _this.activeInitSegmentId_ = null;\n    _this.initSegments_ = {}; // HLSe playback\n\n    _this.cacheEncryptionKeys_ = settings.cacheEncryptionKeys;\n    _this.keyCache_ = {};\n    _this.decrypter_ = settings.decrypter; // Manages the tracking and generation of sync-points, mappings\n    // between a time in the display time and a segment index within\n    // a playlist\n\n    _this.syncController_ = settings.syncController;\n    _this.syncPoint_ = {\n      segmentIndex: 0,\n      time: 0\n    };\n    _this.transmuxer_ = _this.createTransmuxer_();\n\n    _this.triggerSyncInfoUpdate_ = function () {\n      return _this.trigger('syncinfoupdate');\n    };\n\n    _this.syncController_.on('syncinfoupdate', _this.triggerSyncInfoUpdate_);\n\n    _this.mediaSource_.addEventListener('sourceopen', function () {\n      if (!_this.isEndOfStream_()) {\n        _this.ended_ = false;\n      }\n    }); // ...for determining the fetch location\n\n\n    _this.fetchAtBuffer_ = false;\n    _this.logger_ = logger(\"SegmentLoader[\" + _this.loaderType_ + \"]\");\n    Object.defineProperty(_assertThisInitialized(_this), 'state', {\n      get: function get() {\n        return this.state_;\n      },\n      set: function set(newState) {\n        if (newState !== this.state_) {\n          this.logger_(this.state_ + \" -> \" + newState);\n          this.state_ = newState;\n          this.trigger('statechange');\n        }\n      }\n    });\n\n    _this.sourceUpdater_.on('ready', function () {\n      if (_this.hasEnoughInfoToAppend_()) {\n        _this.processCallQueue_();\n      }\n    }); // Only the main loader needs to listen for pending timeline changes, as the main\n    // loader should wait for audio to be ready to change its timeline so that both main\n    // and audio timelines change together. For more details, see the\n    // shouldWaitForTimelineChange function.\n\n\n    if (_this.loaderType_ === 'main') {\n      _this.timelineChangeController_.on('pendingtimelinechange', function () {\n        if (_this.hasEnoughInfoToAppend_()) {\n          _this.processCallQueue_();\n        }\n      });\n    } // The main loader only listens on pending timeline changes, but the audio loader,\n    // since its loads follow main, needs to listen on timeline changes. For more details,\n    // see the shouldWaitForTimelineChange function.\n\n\n    if (_this.loaderType_ === 'audio') {\n      _this.timelineChangeController_.on('timelinechange', function () {\n        if (_this.hasEnoughInfoToLoad_()) {\n          _this.processLoadQueue_();\n        }\n\n        if (_this.hasEnoughInfoToAppend_()) {\n          _this.processCallQueue_();\n        }\n      });\n    }\n\n    return _this;\n  }\n\n  var _proto = SegmentLoader.prototype;\n\n  _proto.createTransmuxer_ = function createTransmuxer_() {\n    return segmentTransmuxer.createTransmuxer({\n      remux: false,\n      alignGopsAtEnd: this.safeAppend_,\n      keepOriginalTimestamps: true,\n      parse708captions: this.parse708captions_,\n      captionServices: this.captionServices_\n    });\n  }\n  /**\n   * reset all of our media stats\n   *\n   * @private\n   */\n  ;\n\n  _proto.resetStats_ = function resetStats_() {\n    this.mediaBytesTransferred = 0;\n    this.mediaRequests = 0;\n    this.mediaRequestsAborted = 0;\n    this.mediaRequestsTimedout = 0;\n    this.mediaRequestsErrored = 0;\n    this.mediaTransferDuration = 0;\n    this.mediaSecondsLoaded = 0;\n    this.mediaAppends = 0;\n  }\n  /**\n   * dispose of the SegmentLoader and reset to the default state\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    this.trigger('dispose');\n    this.state = 'DISPOSED';\n    this.pause();\n    this.abort_();\n\n    if (this.transmuxer_) {\n      this.transmuxer_.terminate();\n    }\n\n    this.resetStats_();\n\n    if (this.checkBufferTimeout_) {\n      window$1.clearTimeout(this.checkBufferTimeout_);\n    }\n\n    if (this.syncController_ && this.triggerSyncInfoUpdate_) {\n      this.syncController_.off('syncinfoupdate', this.triggerSyncInfoUpdate_);\n    }\n\n    this.off();\n  };\n\n  _proto.setAudio = function setAudio(enable) {\n    this.audioDisabled_ = !enable;\n\n    if (enable) {\n      this.appendInitSegment_.audio = true;\n    } else {\n      // remove current track audio if it gets disabled\n      this.sourceUpdater_.removeAudio(0, this.duration_());\n    }\n  }\n  /**\n   * abort anything that is currently doing on with the SegmentLoader\n   * and reset to a default state\n   */\n  ;\n\n  _proto.abort = function abort() {\n    if (this.state !== 'WAITING') {\n      if (this.pendingSegment_) {\n        this.pendingSegment_ = null;\n      }\n\n      return;\n    }\n\n    this.abort_(); // We aborted the requests we were waiting on, so reset the loader's state to READY\n    // since we are no longer \"waiting\" on any requests. XHR callback is not always run\n    // when the request is aborted. This will prevent the loader from being stuck in the\n    // WAITING state indefinitely.\n\n    this.state = 'READY'; // don't wait for buffer check timeouts to begin fetching the\n    // next segment\n\n    if (!this.paused()) {\n      this.monitorBuffer_();\n    }\n  }\n  /**\n   * abort all pending xhr requests and null any pending segements\n   *\n   * @private\n   */\n  ;\n\n  _proto.abort_ = function abort_() {\n    if (this.pendingSegment_ && this.pendingSegment_.abortRequests) {\n      this.pendingSegment_.abortRequests();\n    } // clear out the segment being processed\n\n\n    this.pendingSegment_ = null;\n    this.callQueue_ = [];\n    this.loadQueue_ = [];\n    this.metadataQueue_.id3 = [];\n    this.metadataQueue_.caption = [];\n    this.timelineChangeController_.clearPendingTimelineChange(this.loaderType_);\n    this.waitingOnRemove_ = false;\n    window$1.clearTimeout(this.quotaExceededErrorRetryTimeout_);\n    this.quotaExceededErrorRetryTimeout_ = null;\n  };\n\n  _proto.checkForAbort_ = function checkForAbort_(requestId) {\n    // If the state is APPENDING, then aborts will not modify the state, meaning the first\n    // callback that happens should reset the state to READY so that loading can continue.\n    if (this.state === 'APPENDING' && !this.pendingSegment_) {\n      this.state = 'READY';\n      return true;\n    }\n\n    if (!this.pendingSegment_ || this.pendingSegment_.requestId !== requestId) {\n      return true;\n    }\n\n    return false;\n  }\n  /**\n   * set an error on the segment loader and null out any pending segements\n   *\n   * @param {Error} error the error to set on the SegmentLoader\n   * @return {Error} the error that was set or that is currently set\n   */\n  ;\n\n  _proto.error = function error(_error) {\n    if (typeof _error !== 'undefined') {\n      this.logger_('error occurred:', _error);\n      this.error_ = _error;\n    }\n\n    this.pendingSegment_ = null;\n    return this.error_;\n  };\n\n  _proto.endOfStream = function endOfStream() {\n    this.ended_ = true;\n\n    if (this.transmuxer_) {\n      // need to clear out any cached data to prepare for the new segment\n      segmentTransmuxer.reset(this.transmuxer_);\n    }\n\n    this.gopBuffer_.length = 0;\n    this.pause();\n    this.trigger('ended');\n  }\n  /**\n   * Indicates which time ranges are buffered\n   *\n   * @return {TimeRange}\n   *         TimeRange object representing the current buffered ranges\n   */\n  ;\n\n  _proto.buffered_ = function buffered_() {\n    var trackInfo = this.getMediaInfo_();\n\n    if (!this.sourceUpdater_ || !trackInfo) {\n      return videojs.createTimeRanges();\n    }\n\n    if (this.loaderType_ === 'main') {\n      var hasAudio = trackInfo.hasAudio,\n          hasVideo = trackInfo.hasVideo,\n          isMuxed = trackInfo.isMuxed;\n\n      if (hasVideo && hasAudio && !this.audioDisabled_ && !isMuxed) {\n        return this.sourceUpdater_.buffered();\n      }\n\n      if (hasVideo) {\n        return this.sourceUpdater_.videoBuffered();\n      }\n    } // One case that can be ignored for now is audio only with alt audio,\n    // as we don't yet have proper support for that.\n\n\n    return this.sourceUpdater_.audioBuffered();\n  }\n  /**\n   * Gets and sets init segment for the provided map\n   *\n   * @param {Object} map\n   *        The map object representing the init segment to get or set\n   * @param {boolean=} set\n   *        If true, the init segment for the provided map should be saved\n   * @return {Object}\n   *         map object for desired init segment\n   */\n  ;\n\n  _proto.initSegmentForMap = function initSegmentForMap(map, set) {\n    if (set === void 0) {\n      set = false;\n    }\n\n    if (!map) {\n      return null;\n    }\n\n    var id = initSegmentId(map);\n    var storedMap = this.initSegments_[id];\n\n    if (set && !storedMap && map.bytes) {\n      this.initSegments_[id] = storedMap = {\n        resolvedUri: map.resolvedUri,\n        byterange: map.byterange,\n        bytes: map.bytes,\n        tracks: map.tracks,\n        timescales: map.timescales\n      };\n    }\n\n    return storedMap || map;\n  }\n  /**\n   * Gets and sets key for the provided key\n   *\n   * @param {Object} key\n   *        The key object representing the key to get or set\n   * @param {boolean=} set\n   *        If true, the key for the provided key should be saved\n   * @return {Object}\n   *         Key object for desired key\n   */\n  ;\n\n  _proto.segmentKey = function segmentKey(key, set) {\n    if (set === void 0) {\n      set = false;\n    }\n\n    if (!key) {\n      return null;\n    }\n\n    var id = segmentKeyId(key);\n    var storedKey = this.keyCache_[id]; // TODO: We should use the HTTP Expires header to invalidate our cache per\n    // https://tools.ietf.org/html/draft-pantos-http-live-streaming-23#section-6.2.3\n\n    if (this.cacheEncryptionKeys_ && set && !storedKey && key.bytes) {\n      this.keyCache_[id] = storedKey = {\n        resolvedUri: key.resolvedUri,\n        bytes: key.bytes\n      };\n    }\n\n    var result = {\n      resolvedUri: (storedKey || key).resolvedUri\n    };\n\n    if (storedKey) {\n      result.bytes = storedKey.bytes;\n    }\n\n    return result;\n  }\n  /**\n   * Returns true if all configuration required for loading is present, otherwise false.\n   *\n   * @return {boolean} True if the all configuration is ready for loading\n   * @private\n   */\n  ;\n\n  _proto.couldBeginLoading_ = function couldBeginLoading_() {\n    return this.playlist_ && !this.paused();\n  }\n  /**\n   * load a playlist and start to fill the buffer\n   */\n  ;\n\n  _proto.load = function load() {\n    // un-pause\n    this.monitorBuffer_(); // if we don't have a playlist yet, keep waiting for one to be\n    // specified\n\n    if (!this.playlist_) {\n      return;\n    } // if all the configuration is ready, initialize and begin loading\n\n\n    if (this.state === 'INIT' && this.couldBeginLoading_()) {\n      return this.init_();\n    } // if we're in the middle of processing a segment already, don't\n    // kick off an additional segment request\n\n\n    if (!this.couldBeginLoading_() || this.state !== 'READY' && this.state !== 'INIT') {\n      return;\n    }\n\n    this.state = 'READY';\n  }\n  /**\n   * Once all the starting parameters have been specified, begin\n   * operation. This method should only be invoked from the INIT\n   * state.\n   *\n   * @private\n   */\n  ;\n\n  _proto.init_ = function init_() {\n    this.state = 'READY'; // if this is the audio segment loader, and it hasn't been inited before, then any old\n    // audio data from the muxed content should be removed\n\n    this.resetEverything();\n    return this.monitorBuffer_();\n  }\n  /**\n   * set a playlist on the segment loader\n   *\n   * @param {PlaylistLoader} media the playlist to set on the segment loader\n   */\n  ;\n\n  _proto.playlist = function playlist(newPlaylist, options) {\n    if (options === void 0) {\n      options = {};\n    }\n\n    if (!newPlaylist) {\n      return;\n    }\n\n    var oldPlaylist = this.playlist_;\n    var segmentInfo = this.pendingSegment_;\n    this.playlist_ = newPlaylist;\n    this.xhrOptions_ = options; // when we haven't started playing yet, the start of a live playlist\n    // is always our zero-time so force a sync update each time the playlist\n    // is refreshed from the server\n    //\n    // Use the INIT state to determine if playback has started, as the playlist sync info\n    // should be fixed once requests begin (as sync points are generated based on sync\n    // info), but not before then.\n\n    if (this.state === 'INIT') {\n      newPlaylist.syncInfo = {\n        mediaSequence: newPlaylist.mediaSequence,\n        time: 0\n      }; // Setting the date time mapping means mapping the program date time (if available)\n      // to time 0 on the player's timeline. The playlist's syncInfo serves a similar\n      // purpose, mapping the initial mediaSequence to time zero. Since the syncInfo can\n      // be updated as the playlist is refreshed before the loader starts loading, the\n      // program date time mapping needs to be updated as well.\n      //\n      // This mapping is only done for the main loader because a program date time should\n      // map equivalently between playlists.\n\n      if (this.loaderType_ === 'main') {\n        this.syncController_.setDateTimeMappingForStart(newPlaylist);\n      }\n    }\n\n    var oldId = null;\n\n    if (oldPlaylist) {\n      if (oldPlaylist.id) {\n        oldId = oldPlaylist.id;\n      } else if (oldPlaylist.uri) {\n        oldId = oldPlaylist.uri;\n      }\n    }\n\n    this.logger_(\"playlist update [\" + oldId + \" => \" + (newPlaylist.id || newPlaylist.uri) + \"]\"); // in VOD, this is always a rendition switch (or we updated our syncInfo above)\n    // in LIVE, we always want to update with new playlists (including refreshes)\n\n    this.trigger('syncinfoupdate'); // if we were unpaused but waiting for a playlist, start\n    // buffering now\n\n    if (this.state === 'INIT' && this.couldBeginLoading_()) {\n      return this.init_();\n    }\n\n    if (!oldPlaylist || oldPlaylist.uri !== newPlaylist.uri) {\n      if (this.mediaIndex !== null) {\n        // we must reset/resync the segment loader when we switch renditions and\n        // the segment loader is already synced to the previous rendition\n        // on playlist changes we want it to be possible to fetch\n        // at the buffer for vod but not for live. So we use resetLoader\n        // for live and resyncLoader for vod. We want this because\n        // if a playlist uses independent and non-independent segments/parts the\n        // buffer may not accurately reflect the next segment that we should try\n        // downloading.\n        if (!newPlaylist.endList) {\n          this.resetLoader();\n        } else {\n          this.resyncLoader();\n        }\n      }\n\n      this.currentMediaInfo_ = void 0;\n      this.trigger('playlistupdate'); // the rest of this function depends on `oldPlaylist` being defined\n\n      return;\n    } // we reloaded the same playlist so we are in a live scenario\n    // and we will likely need to adjust the mediaIndex\n\n\n    var mediaSequenceDiff = newPlaylist.mediaSequence - oldPlaylist.mediaSequence;\n    this.logger_(\"live window shift [\" + mediaSequenceDiff + \"]\"); // update the mediaIndex on the SegmentLoader\n    // this is important because we can abort a request and this value must be\n    // equal to the last appended mediaIndex\n\n    if (this.mediaIndex !== null) {\n      this.mediaIndex -= mediaSequenceDiff; // this can happen if we are going to load the first segment, but get a playlist\n      // update during that. mediaIndex would go from 0 to -1 if mediaSequence in the\n      // new playlist was incremented by 1.\n\n      if (this.mediaIndex < 0) {\n        this.mediaIndex = null;\n        this.partIndex = null;\n      } else {\n        var segment = this.playlist_.segments[this.mediaIndex]; // partIndex should remain the same for the same segment\n        // unless parts fell off of the playlist for this segment.\n        // In that case we need to reset partIndex and resync\n\n        if (this.partIndex && (!segment.parts || !segment.parts.length || !segment.parts[this.partIndex])) {\n          var mediaIndex = this.mediaIndex;\n          this.logger_(\"currently processing part (index \" + this.partIndex + \") no longer exists.\");\n          this.resetLoader(); // We want to throw away the partIndex and the data associated with it,\n          // as the part was dropped from our current playlists segment.\n          // The mediaIndex will still be valid so keep that around.\n\n          this.mediaIndex = mediaIndex;\n        }\n      }\n    } // update the mediaIndex on the SegmentInfo object\n    // this is important because we will update this.mediaIndex with this value\n    // in `handleAppendsDone_` after the segment has been successfully appended\n\n\n    if (segmentInfo) {\n      segmentInfo.mediaIndex -= mediaSequenceDiff;\n\n      if (segmentInfo.mediaIndex < 0) {\n        segmentInfo.mediaIndex = null;\n        segmentInfo.partIndex = null;\n      } else {\n        // we need to update the referenced segment so that timing information is\n        // saved for the new playlist's segment, however, if the segment fell off the\n        // playlist, we can leave the old reference and just lose the timing info\n        if (segmentInfo.mediaIndex >= 0) {\n          segmentInfo.segment = newPlaylist.segments[segmentInfo.mediaIndex];\n        }\n\n        if (segmentInfo.partIndex >= 0 && segmentInfo.segment.parts) {\n          segmentInfo.part = segmentInfo.segment.parts[segmentInfo.partIndex];\n        }\n      }\n    }\n\n    this.syncController_.saveExpiredSegmentInfo(oldPlaylist, newPlaylist);\n  }\n  /**\n   * Prevent the loader from fetching additional segments. If there\n   * is a segment request outstanding, it will finish processing\n   * before the loader halts. A segment loader can be unpaused by\n   * calling load().\n   */\n  ;\n\n  _proto.pause = function pause() {\n    if (this.checkBufferTimeout_) {\n      window$1.clearTimeout(this.checkBufferTimeout_);\n      this.checkBufferTimeout_ = null;\n    }\n  }\n  /**\n   * Returns whether the segment loader is fetching additional\n   * segments when given the opportunity. This property can be\n   * modified through calls to pause() and load().\n   */\n  ;\n\n  _proto.paused = function paused() {\n    return this.checkBufferTimeout_ === null;\n  }\n  /**\n   * Delete all the buffered data and reset the SegmentLoader\n   *\n   * @param {Function} [done] an optional callback to be executed when the remove\n   * operation is complete\n   */\n  ;\n\n  _proto.resetEverything = function resetEverything(done) {\n    this.ended_ = false;\n    this.appendInitSegment_ = {\n      audio: true,\n      video: true\n    };\n    this.resetLoader(); // remove from 0, the earliest point, to Infinity, to signify removal of everything.\n    // VTT Segment Loader doesn't need to do anything but in the regular SegmentLoader,\n    // we then clamp the value to duration if necessary.\n\n    this.remove(0, Infinity, done); // clears fmp4 captions\n\n    if (this.transmuxer_) {\n      this.transmuxer_.postMessage({\n        action: 'clearAllMp4Captions'\n      }); // reset the cache in the transmuxer\n\n      this.transmuxer_.postMessage({\n        action: 'reset'\n      });\n    }\n  }\n  /**\n   * Force the SegmentLoader to resync and start loading around the currentTime instead\n   * of starting at the end of the buffer\n   *\n   * Useful for fast quality changes\n   */\n  ;\n\n  _proto.resetLoader = function resetLoader() {\n    this.fetchAtBuffer_ = false;\n    this.resyncLoader();\n  }\n  /**\n   * Force the SegmentLoader to restart synchronization and make a conservative guess\n   * before returning to the simple walk-forward method\n   */\n  ;\n\n  _proto.resyncLoader = function resyncLoader() {\n    if (this.transmuxer_) {\n      // need to clear out any cached data to prepare for the new segment\n      segmentTransmuxer.reset(this.transmuxer_);\n    }\n\n    this.mediaIndex = null;\n    this.partIndex = null;\n    this.syncPoint_ = null;\n    this.isPendingTimestampOffset_ = false;\n    this.callQueue_ = [];\n    this.loadQueue_ = [];\n    this.metadataQueue_.id3 = [];\n    this.metadataQueue_.caption = [];\n    this.abort();\n\n    if (this.transmuxer_) {\n      this.transmuxer_.postMessage({\n        action: 'clearParsedMp4Captions'\n      });\n    }\n  }\n  /**\n   * Remove any data in the source buffer between start and end times\n   *\n   * @param {number} start - the start time of the region to remove from the buffer\n   * @param {number} end - the end time of the region to remove from the buffer\n   * @param {Function} [done] - an optional callback to be executed when the remove\n   * @param {boolean} force - force all remove operations to happen\n   * operation is complete\n   */\n  ;\n\n  _proto.remove = function remove(start, end, done, force) {\n    if (done === void 0) {\n      done = function done() {};\n    }\n\n    if (force === void 0) {\n      force = false;\n    } // clamp end to duration if we need to remove everything.\n    // This is due to a browser bug that causes issues if we remove to Infinity.\n    // videojs/videojs-contrib-hls#1225\n\n\n    if (end === Infinity) {\n      end = this.duration_();\n    } // skip removes that would throw an error\n    // commonly happens during a rendition switch at the start of a video\n    // from start 0 to end 0\n\n\n    if (end <= start) {\n      this.logger_('skipping remove because end ${end} is <= start ${start}');\n      return;\n    }\n\n    if (!this.sourceUpdater_ || !this.getMediaInfo_()) {\n      this.logger_('skipping remove because no source updater or starting media info'); // nothing to remove if we haven't processed any media\n\n      return;\n    } // set it to one to complete this function's removes\n\n\n    var removesRemaining = 1;\n\n    var removeFinished = function removeFinished() {\n      removesRemaining--;\n\n      if (removesRemaining === 0) {\n        done();\n      }\n    };\n\n    if (force || !this.audioDisabled_) {\n      removesRemaining++;\n      this.sourceUpdater_.removeAudio(start, end, removeFinished);\n    } // While it would be better to only remove video if the main loader has video, this\n    // should be safe with audio only as removeVideo will call back even if there's no\n    // video buffer.\n    //\n    // In theory we can check to see if there's video before calling the remove, but in\n    // the event that we're switching between renditions and from video to audio only\n    // (when we add support for that), we may need to clear the video contents despite\n    // what the new media will contain.\n\n\n    if (force || this.loaderType_ === 'main') {\n      this.gopBuffer_ = removeGopBuffer(this.gopBuffer_, start, end, this.timeMapping_);\n      removesRemaining++;\n      this.sourceUpdater_.removeVideo(start, end, removeFinished);\n    } // remove any captions and ID3 tags\n\n\n    for (var track in this.inbandTextTracks_) {\n      removeCuesFromTrack(start, end, this.inbandTextTracks_[track]);\n    }\n\n    removeCuesFromTrack(start, end, this.segmentMetadataTrack_); // finished this function's removes\n\n    removeFinished();\n  }\n  /**\n   * (re-)schedule monitorBufferTick_ to run as soon as possible\n   *\n   * @private\n   */\n  ;\n\n  _proto.monitorBuffer_ = function monitorBuffer_() {\n    if (this.checkBufferTimeout_) {\n      window$1.clearTimeout(this.checkBufferTimeout_);\n    }\n\n    this.checkBufferTimeout_ = window$1.setTimeout(this.monitorBufferTick_.bind(this), 1);\n  }\n  /**\n   * As long as the SegmentLoader is in the READY state, periodically\n   * invoke fillBuffer_().\n   *\n   * @private\n   */\n  ;\n\n  _proto.monitorBufferTick_ = function monitorBufferTick_() {\n    if (this.state === 'READY') {\n      this.fillBuffer_();\n    }\n\n    if (this.checkBufferTimeout_) {\n      window$1.clearTimeout(this.checkBufferTimeout_);\n    }\n\n    this.checkBufferTimeout_ = window$1.setTimeout(this.monitorBufferTick_.bind(this), CHECK_BUFFER_DELAY);\n  }\n  /**\n   * fill the buffer with segements unless the sourceBuffers are\n   * currently updating\n   *\n   * Note: this function should only ever be called by monitorBuffer_\n   * and never directly\n   *\n   * @private\n   */\n  ;\n\n  _proto.fillBuffer_ = function fillBuffer_() {\n    // TODO since the source buffer maintains a queue, and we shouldn't call this function\n    // except when we're ready for the next segment, this check can most likely be removed\n    if (this.sourceUpdater_.updating()) {\n      return;\n    } // see if we need to begin loading immediately\n\n\n    var segmentInfo = this.chooseNextRequest_();\n\n    if (!segmentInfo) {\n      return;\n    }\n\n    if (typeof segmentInfo.timestampOffset === 'number') {\n      this.isPendingTimestampOffset_ = false;\n      this.timelineChangeController_.pendingTimelineChange({\n        type: this.loaderType_,\n        from: this.currentTimeline_,\n        to: segmentInfo.timeline\n      });\n    }\n\n    this.loadSegment_(segmentInfo);\n  }\n  /**\n   * Determines if we should call endOfStream on the media source based\n   * on the state of the buffer or if appened segment was the final\n   * segment in the playlist.\n   *\n   * @param {number} [mediaIndex] the media index of segment we last appended\n   * @param {Object} [playlist] a media playlist object\n   * @return {boolean} do we need to call endOfStream on the MediaSource\n   */\n  ;\n\n  _proto.isEndOfStream_ = function isEndOfStream_(mediaIndex, playlist, partIndex) {\n    if (mediaIndex === void 0) {\n      mediaIndex = this.mediaIndex;\n    }\n\n    if (playlist === void 0) {\n      playlist = this.playlist_;\n    }\n\n    if (partIndex === void 0) {\n      partIndex = this.partIndex;\n    }\n\n    if (!playlist || !this.mediaSource_) {\n      return false;\n    }\n\n    var segment = typeof mediaIndex === 'number' && playlist.segments[mediaIndex]; // mediaIndex is zero based but length is 1 based\n\n    var appendedLastSegment = mediaIndex + 1 === playlist.segments.length; // true if there are no parts, or this is the last part.\n\n    var appendedLastPart = !segment || !segment.parts || partIndex + 1 === segment.parts.length; // if we've buffered to the end of the video, we need to call endOfStream\n    // so that MediaSources can trigger the `ended` event when it runs out of\n    // buffered data instead of waiting for me\n\n    return playlist.endList && this.mediaSource_.readyState === 'open' && appendedLastSegment && appendedLastPart;\n  }\n  /**\n   * Determines what request should be made given current segment loader state.\n   *\n   * @return {Object} a request object that describes the segment/part to load\n   */\n  ;\n\n  _proto.chooseNextRequest_ = function chooseNextRequest_() {\n    var buffered = this.buffered_();\n    var bufferedEnd = lastBufferedEnd(buffered) || 0;\n    var bufferedTime = timeAheadOf(buffered, this.currentTime_());\n    var preloaded = !this.hasPlayed_() && bufferedTime >= 1;\n    var haveEnoughBuffer = bufferedTime >= this.goalBufferLength_();\n    var segments = this.playlist_.segments; // return no segment if:\n    // 1. we don't have segments\n    // 2. The video has not yet played and we already downloaded a segment\n    // 3. we already have enough buffered time\n\n    if (!segments.length || preloaded || haveEnoughBuffer) {\n      return null;\n    }\n\n    this.syncPoint_ = this.syncPoint_ || this.syncController_.getSyncPoint(this.playlist_, this.duration_(), this.currentTimeline_, this.currentTime_());\n    var next = {\n      partIndex: null,\n      mediaIndex: null,\n      startOfSegment: null,\n      playlist: this.playlist_,\n      isSyncRequest: Boolean(!this.syncPoint_)\n    };\n\n    if (next.isSyncRequest) {\n      next.mediaIndex = getSyncSegmentCandidate(this.currentTimeline_, segments, bufferedEnd);\n    } else if (this.mediaIndex !== null) {\n      var segment = segments[this.mediaIndex];\n      var partIndex = typeof this.partIndex === 'number' ? this.partIndex : -1;\n      next.startOfSegment = segment.end ? segment.end : bufferedEnd;\n\n      if (segment.parts && segment.parts[partIndex + 1]) {\n        next.mediaIndex = this.mediaIndex;\n        next.partIndex = partIndex + 1;\n      } else {\n        next.mediaIndex = this.mediaIndex + 1;\n      }\n    } else {\n      // Find the segment containing the end of the buffer or current time.\n      var _Playlist$getMediaInf = Playlist.getMediaInfoForTime({\n        experimentalExactManifestTimings: this.experimentalExactManifestTimings,\n        playlist: this.playlist_,\n        currentTime: this.fetchAtBuffer_ ? bufferedEnd : this.currentTime_(),\n        startingPartIndex: this.syncPoint_.partIndex,\n        startingSegmentIndex: this.syncPoint_.segmentIndex,\n        startTime: this.syncPoint_.time\n      }),\n          segmentIndex = _Playlist$getMediaInf.segmentIndex,\n          startTime = _Playlist$getMediaInf.startTime,\n          _partIndex = _Playlist$getMediaInf.partIndex;\n\n      next.getMediaInfoForTime = this.fetchAtBuffer_ ? \"bufferedEnd \" + bufferedEnd : \"currentTime \" + this.currentTime_();\n      next.mediaIndex = segmentIndex;\n      next.startOfSegment = startTime;\n      next.partIndex = _partIndex;\n    }\n\n    var nextSegment = segments[next.mediaIndex];\n    var nextPart = nextSegment && typeof next.partIndex === 'number' && nextSegment.parts && nextSegment.parts[next.partIndex]; // if the next segment index is invalid or\n    // the next partIndex is invalid do not choose a next segment.\n\n    if (!nextSegment || typeof next.partIndex === 'number' && !nextPart) {\n      return null;\n    } // if the next segment has parts, and we don't have a partIndex.\n    // Set partIndex to 0\n\n\n    if (typeof next.partIndex !== 'number' && nextSegment.parts) {\n      next.partIndex = 0;\n      nextPart = nextSegment.parts[0];\n    } // if we have no buffered data then we need to make sure\n    // that the next part we append is \"independent\" if possible.\n    // So we check if the previous part is independent, and request\n    // it if it is.\n\n\n    if (!bufferedTime && nextPart && !nextPart.independent) {\n      if (next.partIndex === 0) {\n        var lastSegment = segments[next.mediaIndex - 1];\n        var lastSegmentLastPart = lastSegment.parts && lastSegment.parts.length && lastSegment.parts[lastSegment.parts.length - 1];\n\n        if (lastSegmentLastPart && lastSegmentLastPart.independent) {\n          next.mediaIndex -= 1;\n          next.partIndex = lastSegment.parts.length - 1;\n          next.independent = 'previous segment';\n        }\n      } else if (nextSegment.parts[next.partIndex - 1].independent) {\n        next.partIndex -= 1;\n        next.independent = 'previous part';\n      }\n    }\n\n    var ended = this.mediaSource_ && this.mediaSource_.readyState === 'ended'; // do not choose a next segment if all of the following:\n    // 1. this is the last segment in the playlist\n    // 2. end of stream has been called on the media source already\n    // 3. the player is not seeking\n\n    if (next.mediaIndex >= segments.length - 1 && ended && !this.seeking_()) {\n      return null;\n    }\n\n    return this.generateSegmentInfo_(next);\n  };\n\n  _proto.generateSegmentInfo_ = function generateSegmentInfo_(options) {\n    var independent = options.independent,\n        playlist = options.playlist,\n        mediaIndex = options.mediaIndex,\n        startOfSegment = options.startOfSegment,\n        isSyncRequest = options.isSyncRequest,\n        partIndex = options.partIndex,\n        forceTimestampOffset = options.forceTimestampOffset,\n        getMediaInfoForTime = options.getMediaInfoForTime;\n    var segment = playlist.segments[mediaIndex];\n    var part = typeof partIndex === 'number' && segment.parts[partIndex];\n    var segmentInfo = {\n      requestId: 'segment-loader-' + Math.random(),\n      // resolve the segment URL relative to the playlist\n      uri: part && part.resolvedUri || segment.resolvedUri,\n      // the segment's mediaIndex at the time it was requested\n      mediaIndex: mediaIndex,\n      partIndex: part ? partIndex : null,\n      // whether or not to update the SegmentLoader's state with this\n      // segment's mediaIndex\n      isSyncRequest: isSyncRequest,\n      startOfSegment: startOfSegment,\n      // the segment's playlist\n      playlist: playlist,\n      // unencrypted bytes of the segment\n      bytes: null,\n      // when a key is defined for this segment, the encrypted bytes\n      encryptedBytes: null,\n      // The target timestampOffset for this segment when we append it\n      // to the source buffer\n      timestampOffset: null,\n      // The timeline that the segment is in\n      timeline: segment.timeline,\n      // The expected duration of the segment in seconds\n      duration: part && part.duration || segment.duration,\n      // retain the segment in case the playlist updates while doing an async process\n      segment: segment,\n      part: part,\n      byteLength: 0,\n      transmuxer: this.transmuxer_,\n      // type of getMediaInfoForTime that was used to get this segment\n      getMediaInfoForTime: getMediaInfoForTime,\n      independent: independent\n    };\n    var overrideCheck = typeof forceTimestampOffset !== 'undefined' ? forceTimestampOffset : this.isPendingTimestampOffset_;\n    segmentInfo.timestampOffset = this.timestampOffsetForSegment_({\n      segmentTimeline: segment.timeline,\n      currentTimeline: this.currentTimeline_,\n      startOfSegment: startOfSegment,\n      buffered: this.buffered_(),\n      overrideCheck: overrideCheck\n    });\n    var audioBufferedEnd = lastBufferedEnd(this.sourceUpdater_.audioBuffered());\n\n    if (typeof audioBufferedEnd === 'number') {\n      // since the transmuxer is using the actual timing values, but the buffer is\n      // adjusted by the timestamp offset, we must adjust the value here\n      segmentInfo.audioAppendStart = audioBufferedEnd - this.sourceUpdater_.audioTimestampOffset();\n    }\n\n    if (this.sourceUpdater_.videoBuffered().length) {\n      segmentInfo.gopsToAlignWith = gopsSafeToAlignWith(this.gopBuffer_, // since the transmuxer is using the actual timing values, but the time is\n      // adjusted by the timestmap offset, we must adjust the value here\n      this.currentTime_() - this.sourceUpdater_.videoTimestampOffset(), this.timeMapping_);\n    }\n\n    return segmentInfo;\n  } // get the timestampoffset for a segment,\n  // added so that vtt segment loader can override and prevent\n  // adding timestamp offsets.\n  ;\n\n  _proto.timestampOffsetForSegment_ = function timestampOffsetForSegment_(options) {\n    return timestampOffsetForSegment(options);\n  }\n  /**\n   * Determines if the network has enough bandwidth to complete the current segment\n   * request in a timely manner. If not, the request will be aborted early and bandwidth\n   * updated to trigger a playlist switch.\n   *\n   * @param {Object} stats\n   *        Object containing stats about the request timing and size\n   * @private\n   */\n  ;\n\n  _proto.earlyAbortWhenNeeded_ = function earlyAbortWhenNeeded_(stats) {\n    if (this.vhs_.tech_.paused() || // Don't abort if the current playlist is on the lowestEnabledRendition\n    // TODO: Replace using timeout with a boolean indicating whether this playlist is\n    //       the lowestEnabledRendition.\n    !this.xhrOptions_.timeout || // Don't abort if we have no bandwidth information to estimate segment sizes\n    !this.playlist_.attributes.BANDWIDTH) {\n      return;\n    } // Wait at least 1 second since the first byte of data has been received before\n    // using the calculated bandwidth from the progress event to allow the bitrate\n    // to stabilize\n\n\n    if (Date.now() - (stats.firstBytesReceivedAt || Date.now()) < 1000) {\n      return;\n    }\n\n    var currentTime = this.currentTime_();\n    var measuredBandwidth = stats.bandwidth;\n    var segmentDuration = this.pendingSegment_.duration;\n    var requestTimeRemaining = Playlist.estimateSegmentRequestTime(segmentDuration, measuredBandwidth, this.playlist_, stats.bytesReceived); // Subtract 1 from the timeUntilRebuffer so we still consider an early abort\n    // if we are only left with less than 1 second when the request completes.\n    // A negative timeUntilRebuffering indicates we are already rebuffering\n\n    var timeUntilRebuffer$1 = timeUntilRebuffer(this.buffered_(), currentTime, this.vhs_.tech_.playbackRate()) - 1; // Only consider aborting early if the estimated time to finish the download\n    // is larger than the estimated time until the player runs out of forward buffer\n\n    if (requestTimeRemaining <= timeUntilRebuffer$1) {\n      return;\n    }\n\n    var switchCandidate = minRebufferMaxBandwidthSelector({\n      master: this.vhs_.playlists.master,\n      currentTime: currentTime,\n      bandwidth: measuredBandwidth,\n      duration: this.duration_(),\n      segmentDuration: segmentDuration,\n      timeUntilRebuffer: timeUntilRebuffer$1,\n      currentTimeline: this.currentTimeline_,\n      syncController: this.syncController_\n    });\n\n    if (!switchCandidate) {\n      return;\n    }\n\n    var rebufferingImpact = requestTimeRemaining - timeUntilRebuffer$1;\n    var timeSavedBySwitching = rebufferingImpact - switchCandidate.rebufferingImpact;\n    var minimumTimeSaving = 0.5; // If we are already rebuffering, increase the amount of variance we add to the\n    // potential round trip time of the new request so that we are not too aggressive\n    // with switching to a playlist that might save us a fraction of a second.\n\n    if (timeUntilRebuffer$1 <= TIME_FUDGE_FACTOR) {\n      minimumTimeSaving = 1;\n    }\n\n    if (!switchCandidate.playlist || switchCandidate.playlist.uri === this.playlist_.uri || timeSavedBySwitching < minimumTimeSaving) {\n      return;\n    } // set the bandwidth to that of the desired playlist being sure to scale by\n    // BANDWIDTH_VARIANCE and add one so the playlist selector does not exclude it\n    // don't trigger a bandwidthupdate as the bandwidth is artifial\n\n\n    this.bandwidth = switchCandidate.playlist.attributes.BANDWIDTH * Config.BANDWIDTH_VARIANCE + 1;\n    this.trigger('earlyabort');\n  };\n\n  _proto.handleAbort_ = function handleAbort_(segmentInfo) {\n    this.logger_(\"Aborting \" + segmentInfoString(segmentInfo));\n    this.mediaRequestsAborted += 1;\n  }\n  /**\n   * XHR `progress` event handler\n   *\n   * @param {Event}\n   *        The XHR `progress` event\n   * @param {Object} simpleSegment\n   *        A simplified segment object copy\n   * @private\n   */\n  ;\n\n  _proto.handleProgress_ = function handleProgress_(event, simpleSegment) {\n    this.earlyAbortWhenNeeded_(simpleSegment.stats);\n\n    if (this.checkForAbort_(simpleSegment.requestId)) {\n      return;\n    }\n\n    this.trigger('progress');\n  };\n\n  _proto.handleTrackInfo_ = function handleTrackInfo_(simpleSegment, trackInfo) {\n    this.earlyAbortWhenNeeded_(simpleSegment.stats);\n\n    if (this.checkForAbort_(simpleSegment.requestId)) {\n      return;\n    }\n\n    if (this.checkForIllegalMediaSwitch(trackInfo)) {\n      return;\n    }\n\n    trackInfo = trackInfo || {}; // When we have track info, determine what media types this loader is dealing with.\n    // Guard against cases where we're not getting track info at all until we are\n    // certain that all streams will provide it.\n\n    if (!shallowEqual(this.currentMediaInfo_, trackInfo)) {\n      this.appendInitSegment_ = {\n        audio: true,\n        video: true\n      };\n      this.startingMediaInfo_ = trackInfo;\n      this.currentMediaInfo_ = trackInfo;\n      this.logger_('trackinfo update', trackInfo);\n      this.trigger('trackinfo');\n    } // trackinfo may cause an abort if the trackinfo\n    // causes a codec change to an unsupported codec.\n\n\n    if (this.checkForAbort_(simpleSegment.requestId)) {\n      return;\n    } // set trackinfo on the pending segment so that\n    // it can append.\n\n\n    this.pendingSegment_.trackInfo = trackInfo; // check if any calls were waiting on the track info\n\n    if (this.hasEnoughInfoToAppend_()) {\n      this.processCallQueue_();\n    }\n  };\n\n  _proto.handleTimingInfo_ = function handleTimingInfo_(simpleSegment, mediaType, timeType, time) {\n    this.earlyAbortWhenNeeded_(simpleSegment.stats);\n\n    if (this.checkForAbort_(simpleSegment.requestId)) {\n      return;\n    }\n\n    var segmentInfo = this.pendingSegment_;\n    var timingInfoProperty = timingInfoPropertyForMedia(mediaType);\n    segmentInfo[timingInfoProperty] = segmentInfo[timingInfoProperty] || {};\n    segmentInfo[timingInfoProperty][timeType] = time;\n    this.logger_(\"timinginfo: \" + mediaType + \" - \" + timeType + \" - \" + time); // check if any calls were waiting on the timing info\n\n    if (this.hasEnoughInfoToAppend_()) {\n      this.processCallQueue_();\n    }\n  };\n\n  _proto.handleCaptions_ = function handleCaptions_(simpleSegment, captionData) {\n    var _this2 = this;\n\n    this.earlyAbortWhenNeeded_(simpleSegment.stats);\n\n    if (this.checkForAbort_(simpleSegment.requestId)) {\n      return;\n    } // This could only happen with fmp4 segments, but\n    // should still not happen in general\n\n\n    if (captionData.length === 0) {\n      this.logger_('SegmentLoader received no captions from a caption event');\n      return;\n    }\n\n    var segmentInfo = this.pendingSegment_; // Wait until we have some video data so that caption timing\n    // can be adjusted by the timestamp offset\n\n    if (!segmentInfo.hasAppendedData_) {\n      this.metadataQueue_.caption.push(this.handleCaptions_.bind(this, simpleSegment, captionData));\n      return;\n    }\n\n    var timestampOffset = this.sourceUpdater_.videoTimestampOffset() === null ? this.sourceUpdater_.audioTimestampOffset() : this.sourceUpdater_.videoTimestampOffset();\n    var captionTracks = {}; // get total start/end and captions for each track/stream\n\n    captionData.forEach(function (caption) {\n      // caption.stream is actually a track name...\n      // set to the existing values in tracks or default values\n      captionTracks[caption.stream] = captionTracks[caption.stream] || {\n        // Infinity, as any other value will be less than this\n        startTime: Infinity,\n        captions: [],\n        // 0 as an other value will be more than this\n        endTime: 0\n      };\n      var captionTrack = captionTracks[caption.stream];\n      captionTrack.startTime = Math.min(captionTrack.startTime, caption.startTime + timestampOffset);\n      captionTrack.endTime = Math.max(captionTrack.endTime, caption.endTime + timestampOffset);\n      captionTrack.captions.push(caption);\n    });\n    Object.keys(captionTracks).forEach(function (trackName) {\n      var _captionTracks$trackN = captionTracks[trackName],\n          startTime = _captionTracks$trackN.startTime,\n          endTime = _captionTracks$trackN.endTime,\n          captions = _captionTracks$trackN.captions;\n      var inbandTextTracks = _this2.inbandTextTracks_;\n\n      _this2.logger_(\"adding cues from \" + startTime + \" -> \" + endTime + \" for \" + trackName);\n\n      createCaptionsTrackIfNotExists(inbandTextTracks, _this2.vhs_.tech_, trackName); // clear out any cues that start and end at the same time period for the same track.\n      // We do this because a rendition change that also changes the timescale for captions\n      // will result in captions being re-parsed for certain segments. If we add them again\n      // without clearing we will have two of the same captions visible.\n\n      removeCuesFromTrack(startTime, endTime, inbandTextTracks[trackName]);\n      addCaptionData({\n        captionArray: captions,\n        inbandTextTracks: inbandTextTracks,\n        timestampOffset: timestampOffset\n      });\n    }); // Reset stored captions since we added parsed\n    // captions to a text track at this point\n\n    if (this.transmuxer_) {\n      this.transmuxer_.postMessage({\n        action: 'clearParsedMp4Captions'\n      });\n    }\n  };\n\n  _proto.handleId3_ = function handleId3_(simpleSegment, id3Frames, dispatchType) {\n    this.earlyAbortWhenNeeded_(simpleSegment.stats);\n\n    if (this.checkForAbort_(simpleSegment.requestId)) {\n      return;\n    }\n\n    var segmentInfo = this.pendingSegment_; // we need to have appended data in order for the timestamp offset to be set\n\n    if (!segmentInfo.hasAppendedData_) {\n      this.metadataQueue_.id3.push(this.handleId3_.bind(this, simpleSegment, id3Frames, dispatchType));\n      return;\n    }\n\n    var timestampOffset = this.sourceUpdater_.videoTimestampOffset() === null ? this.sourceUpdater_.audioTimestampOffset() : this.sourceUpdater_.videoTimestampOffset(); // There's potentially an issue where we could double add metadata if there's a muxed\n    // audio/video source with a metadata track, and an alt audio with a metadata track.\n    // However, this probably won't happen, and if it does it can be handled then.\n\n    createMetadataTrackIfNotExists(this.inbandTextTracks_, dispatchType, this.vhs_.tech_);\n    addMetadata({\n      inbandTextTracks: this.inbandTextTracks_,\n      metadataArray: id3Frames,\n      timestampOffset: timestampOffset,\n      videoDuration: this.duration_()\n    });\n  };\n\n  _proto.processMetadataQueue_ = function processMetadataQueue_() {\n    this.metadataQueue_.id3.forEach(function (fn) {\n      return fn();\n    });\n    this.metadataQueue_.caption.forEach(function (fn) {\n      return fn();\n    });\n    this.metadataQueue_.id3 = [];\n    this.metadataQueue_.caption = [];\n  };\n\n  _proto.processCallQueue_ = function processCallQueue_() {\n    var callQueue = this.callQueue_; // Clear out the queue before the queued functions are run, since some of the\n    // functions may check the length of the load queue and default to pushing themselves\n    // back onto the queue.\n\n    this.callQueue_ = [];\n    callQueue.forEach(function (fun) {\n      return fun();\n    });\n  };\n\n  _proto.processLoadQueue_ = function processLoadQueue_() {\n    var loadQueue = this.loadQueue_; // Clear out the queue before the queued functions are run, since some of the\n    // functions may check the length of the load queue and default to pushing themselves\n    // back onto the queue.\n\n    this.loadQueue_ = [];\n    loadQueue.forEach(function (fun) {\n      return fun();\n    });\n  }\n  /**\n   * Determines whether the loader has enough info to load the next segment.\n   *\n   * @return {boolean}\n   *         Whether or not the loader has enough info to load the next segment\n   */\n  ;\n\n  _proto.hasEnoughInfoToLoad_ = function hasEnoughInfoToLoad_() {\n    // Since primary timing goes by video, only the audio loader potentially needs to wait\n    // to load.\n    if (this.loaderType_ !== 'audio') {\n      return true;\n    }\n\n    var segmentInfo = this.pendingSegment_; // A fill buffer must have already run to establish a pending segment before there's\n    // enough info to load.\n\n    if (!segmentInfo) {\n      return false;\n    } // The first segment can and should be loaded immediately so that source buffers are\n    // created together (before appending). Source buffer creation uses the presence of\n    // audio and video data to determine whether to create audio/video source buffers, and\n    // uses processed (transmuxed or parsed) media to determine the types required.\n\n\n    if (!this.getCurrentMediaInfo_()) {\n      return true;\n    }\n\n    if ( // Technically, instead of waiting to load a segment on timeline changes, a segment\n    // can be requested and downloaded and only wait before it is transmuxed or parsed.\n    // But in practice, there are a few reasons why it is better to wait until a loader\n    // is ready to append that segment before requesting and downloading:\n    //\n    // 1. Because audio and main loaders cross discontinuities together, if this loader\n    //    is waiting for the other to catch up, then instead of requesting another\n    //    segment and using up more bandwidth, by not yet loading, more bandwidth is\n    //    allotted to the loader currently behind.\n    // 2. media-segment-request doesn't have to have logic to consider whether a segment\n    // is ready to be processed or not, isolating the queueing behavior to the loader.\n    // 3. The audio loader bases some of its segment properties on timing information\n    //    provided by the main loader, meaning that, if the logic for waiting on\n    //    processing was in media-segment-request, then it would also need to know how\n    //    to re-generate the segment information after the main loader caught up.\n    shouldWaitForTimelineChange({\n      timelineChangeController: this.timelineChangeController_,\n      currentTimeline: this.currentTimeline_,\n      segmentTimeline: segmentInfo.timeline,\n      loaderType: this.loaderType_,\n      audioDisabled: this.audioDisabled_\n    })) {\n      return false;\n    }\n\n    return true;\n  };\n\n  _proto.getCurrentMediaInfo_ = function getCurrentMediaInfo_(segmentInfo) {\n    if (segmentInfo === void 0) {\n      segmentInfo = this.pendingSegment_;\n    }\n\n    return segmentInfo && segmentInfo.trackInfo || this.currentMediaInfo_;\n  };\n\n  _proto.getMediaInfo_ = function getMediaInfo_(segmentInfo) {\n    if (segmentInfo === void 0) {\n      segmentInfo = this.pendingSegment_;\n    }\n\n    return this.getCurrentMediaInfo_(segmentInfo) || this.startingMediaInfo_;\n  };\n\n  _proto.hasEnoughInfoToAppend_ = function hasEnoughInfoToAppend_() {\n    if (!this.sourceUpdater_.ready()) {\n      return false;\n    } // If content needs to be removed or the loader is waiting on an append reattempt,\n    // then no additional content should be appended until the prior append is resolved.\n\n\n    if (this.waitingOnRemove_ || this.quotaExceededErrorRetryTimeout_) {\n      return false;\n    }\n\n    var segmentInfo = this.pendingSegment_;\n    var trackInfo = this.getCurrentMediaInfo_(); // no segment to append any data for or\n    // we do not have information on this specific\n    // segment yet\n\n    if (!segmentInfo || !trackInfo) {\n      return false;\n    }\n\n    var hasAudio = trackInfo.hasAudio,\n        hasVideo = trackInfo.hasVideo,\n        isMuxed = trackInfo.isMuxed;\n\n    if (hasVideo && !segmentInfo.videoTimingInfo) {\n      return false;\n    } // muxed content only relies on video timing information for now.\n\n\n    if (hasAudio && !this.audioDisabled_ && !isMuxed && !segmentInfo.audioTimingInfo) {\n      return false;\n    }\n\n    if (shouldWaitForTimelineChange({\n      timelineChangeController: this.timelineChangeController_,\n      currentTimeline: this.currentTimeline_,\n      segmentTimeline: segmentInfo.timeline,\n      loaderType: this.loaderType_,\n      audioDisabled: this.audioDisabled_\n    })) {\n      return false;\n    }\n\n    return true;\n  };\n\n  _proto.handleData_ = function handleData_(simpleSegment, result) {\n    this.earlyAbortWhenNeeded_(simpleSegment.stats);\n\n    if (this.checkForAbort_(simpleSegment.requestId)) {\n      return;\n    } // If there's anything in the call queue, then this data came later and should be\n    // executed after the calls currently queued.\n\n\n    if (this.callQueue_.length || !this.hasEnoughInfoToAppend_()) {\n      this.callQueue_.push(this.handleData_.bind(this, simpleSegment, result));\n      return;\n    }\n\n    var segmentInfo = this.pendingSegment_; // update the time mapping so we can translate from display time to media time\n\n    this.setTimeMapping_(segmentInfo.timeline); // for tracking overall stats\n\n    this.updateMediaSecondsLoaded_(segmentInfo.part || segmentInfo.segment); // Note that the state isn't changed from loading to appending. This is because abort\n    // logic may change behavior depending on the state, and changing state too early may\n    // inflate our estimates of bandwidth. In the future this should be re-examined to\n    // note more granular states.\n    // don't process and append data if the mediaSource is closed\n\n    if (this.mediaSource_.readyState === 'closed') {\n      return;\n    } // if this request included an initialization segment, save that data\n    // to the initSegment cache\n\n\n    if (simpleSegment.map) {\n      simpleSegment.map = this.initSegmentForMap(simpleSegment.map, true); // move over init segment properties to media request\n\n      segmentInfo.segment.map = simpleSegment.map;\n    } // if this request included a segment key, save that data in the cache\n\n\n    if (simpleSegment.key) {\n      this.segmentKey(simpleSegment.key, true);\n    }\n\n    segmentInfo.isFmp4 = simpleSegment.isFmp4;\n    segmentInfo.timingInfo = segmentInfo.timingInfo || {};\n\n    if (segmentInfo.isFmp4) {\n      this.trigger('fmp4');\n      segmentInfo.timingInfo.start = segmentInfo[timingInfoPropertyForMedia(result.type)].start;\n    } else {\n      var trackInfo = this.getCurrentMediaInfo_();\n      var useVideoTimingInfo = this.loaderType_ === 'main' && trackInfo && trackInfo.hasVideo;\n      var firstVideoFrameTimeForData;\n\n      if (useVideoTimingInfo) {\n        firstVideoFrameTimeForData = segmentInfo.videoTimingInfo.start;\n      } // Segment loader knows more about segment timing than the transmuxer (in certain\n      // aspects), so make any changes required for a more accurate start time.\n      // Don't set the end time yet, as the segment may not be finished processing.\n\n\n      segmentInfo.timingInfo.start = this.trueSegmentStart_({\n        currentStart: segmentInfo.timingInfo.start,\n        playlist: segmentInfo.playlist,\n        mediaIndex: segmentInfo.mediaIndex,\n        currentVideoTimestampOffset: this.sourceUpdater_.videoTimestampOffset(),\n        useVideoTimingInfo: useVideoTimingInfo,\n        firstVideoFrameTimeForData: firstVideoFrameTimeForData,\n        videoTimingInfo: segmentInfo.videoTimingInfo,\n        audioTimingInfo: segmentInfo.audioTimingInfo\n      });\n    } // Init segments for audio and video only need to be appended in certain cases. Now\n    // that data is about to be appended, we can check the final cases to determine\n    // whether we should append an init segment.\n\n\n    this.updateAppendInitSegmentStatus(segmentInfo, result.type); // Timestamp offset should be updated once we get new data and have its timing info,\n    // as we use the start of the segment to offset the best guess (playlist provided)\n    // timestamp offset.\n\n    this.updateSourceBufferTimestampOffset_(segmentInfo); // if this is a sync request we need to determine whether it should\n    // be appended or not.\n\n    if (segmentInfo.isSyncRequest) {\n      // first save/update our timing info for this segment.\n      // this is what allows us to choose an accurate segment\n      // and the main reason we make a sync request.\n      this.updateTimingInfoEnd_(segmentInfo);\n      this.syncController_.saveSegmentTimingInfo({\n        segmentInfo: segmentInfo,\n        shouldSaveTimelineMapping: this.loaderType_ === 'main'\n      });\n      var next = this.chooseNextRequest_(); // If the sync request isn't the segment that would be requested next\n      // after taking into account its timing info, do not append it.\n\n      if (next.mediaIndex !== segmentInfo.mediaIndex || next.partIndex !== segmentInfo.partIndex) {\n        this.logger_('sync segment was incorrect, not appending');\n        return;\n      } // otherwise append it like any other segment as our guess was correct.\n\n\n      this.logger_('sync segment was correct, appending');\n    } // Save some state so that in the future anything waiting on first append (and/or\n    // timestamp offset(s)) can process immediately. While the extra state isn't optimal,\n    // we need some notion of whether the timestamp offset or other relevant information\n    // has had a chance to be set.\n\n\n    segmentInfo.hasAppendedData_ = true; // Now that the timestamp offset should be set, we can append any waiting ID3 tags.\n\n    this.processMetadataQueue_();\n    this.appendData_(segmentInfo, result);\n  };\n\n  _proto.updateAppendInitSegmentStatus = function updateAppendInitSegmentStatus(segmentInfo, type) {\n    // alt audio doesn't manage timestamp offset\n    if (this.loaderType_ === 'main' && typeof segmentInfo.timestampOffset === 'number' && // in the case that we're handling partial data, we don't want to append an init\n    // segment for each chunk\n    !segmentInfo.changedTimestampOffset) {\n      // if the timestamp offset changed, the timeline may have changed, so we have to re-\n      // append init segments\n      this.appendInitSegment_ = {\n        audio: true,\n        video: true\n      };\n    }\n\n    if (this.playlistOfLastInitSegment_[type] !== segmentInfo.playlist) {\n      // make sure we append init segment on playlist changes, in case the media config\n      // changed\n      this.appendInitSegment_[type] = true;\n    }\n  };\n\n  _proto.getInitSegmentAndUpdateState_ = function getInitSegmentAndUpdateState_(_ref4) {\n    var type = _ref4.type,\n        initSegment = _ref4.initSegment,\n        map = _ref4.map,\n        playlist = _ref4.playlist; // \"The EXT-X-MAP tag specifies how to obtain the Media Initialization Section\n    // (Section 3) required to parse the applicable Media Segments.  It applies to every\n    // Media Segment that appears after it in the Playlist until the next EXT-X-MAP tag\n    // or until the end of the playlist.\"\n    // https://tools.ietf.org/html/draft-pantos-http-live-streaming-23#section-4.3.2.5\n\n    if (map) {\n      var id = initSegmentId(map);\n\n      if (this.activeInitSegmentId_ === id) {\n        // don't need to re-append the init segment if the ID matches\n        return null;\n      } // a map-specified init segment takes priority over any transmuxed (or otherwise\n      // obtained) init segment\n      //\n      // this also caches the init segment for later use\n\n\n      initSegment = this.initSegmentForMap(map, true).bytes;\n      this.activeInitSegmentId_ = id;\n    } // We used to always prepend init segments for video, however, that shouldn't be\n    // necessary. Instead, we should only append on changes, similar to what we've always\n    // done for audio. This is more important (though may not be that important) for\n    // frame-by-frame appending for LHLS, simply because of the increased quantity of\n    // appends.\n\n\n    if (initSegment && this.appendInitSegment_[type]) {\n      // Make sure we track the playlist that we last used for the init segment, so that\n      // we can re-append the init segment in the event that we get data from a new\n      // playlist. Discontinuities and track changes are handled in other sections.\n      this.playlistOfLastInitSegment_[type] = playlist; // Disable future init segment appends for this type. Until a change is necessary.\n\n      this.appendInitSegment_[type] = false; // we need to clear out the fmp4 active init segment id, since\n      // we are appending the muxer init segment\n\n      this.activeInitSegmentId_ = null;\n      return initSegment;\n    }\n\n    return null;\n  };\n\n  _proto.handleQuotaExceededError_ = function handleQuotaExceededError_(_ref5, error) {\n    var _this3 = this;\n\n    var segmentInfo = _ref5.segmentInfo,\n        type = _ref5.type,\n        bytes = _ref5.bytes;\n    var audioBuffered = this.sourceUpdater_.audioBuffered();\n    var videoBuffered = this.sourceUpdater_.videoBuffered(); // For now we're ignoring any notion of gaps in the buffer, but they, in theory,\n    // should be cleared out during the buffer removals. However, log in case it helps\n    // debug.\n\n    if (audioBuffered.length > 1) {\n      this.logger_('On QUOTA_EXCEEDED_ERR, found gaps in the audio buffer: ' + timeRangesToArray(audioBuffered).join(', '));\n    }\n\n    if (videoBuffered.length > 1) {\n      this.logger_('On QUOTA_EXCEEDED_ERR, found gaps in the video buffer: ' + timeRangesToArray(videoBuffered).join(', '));\n    }\n\n    var audioBufferStart = audioBuffered.length ? audioBuffered.start(0) : 0;\n    var audioBufferEnd = audioBuffered.length ? audioBuffered.end(audioBuffered.length - 1) : 0;\n    var videoBufferStart = videoBuffered.length ? videoBuffered.start(0) : 0;\n    var videoBufferEnd = videoBuffered.length ? videoBuffered.end(videoBuffered.length - 1) : 0;\n\n    if (audioBufferEnd - audioBufferStart <= MIN_BACK_BUFFER && videoBufferEnd - videoBufferStart <= MIN_BACK_BUFFER) {\n      // Can't remove enough buffer to make room for new segment (or the browser doesn't\n      // allow for appends of segments this size). In the future, it may be possible to\n      // split up the segment and append in pieces, but for now, error out this playlist\n      // in an attempt to switch to a more manageable rendition.\n      this.logger_('On QUOTA_EXCEEDED_ERR, single segment too large to append to ' + 'buffer, triggering an error. ' + (\"Appended byte length: \" + bytes.byteLength + \", \") + (\"audio buffer: \" + timeRangesToArray(audioBuffered).join(', ') + \", \") + (\"video buffer: \" + timeRangesToArray(videoBuffered).join(', ') + \", \"));\n      this.error({\n        message: 'Quota exceeded error with append of a single segment of content',\n        excludeUntil: Infinity\n      });\n      this.trigger('error');\n      return;\n    } // To try to resolve the quota exceeded error, clear back buffer and retry. This means\n    // that the segment-loader should block on future events until this one is handled, so\n    // that it doesn't keep moving onto further segments. Adding the call to the call\n    // queue will prevent further appends until waitingOnRemove_ and\n    // quotaExceededErrorRetryTimeout_ are cleared.\n    //\n    // Note that this will only block the current loader. In the case of demuxed content,\n    // the other load may keep filling as fast as possible. In practice, this should be\n    // OK, as it is a rare case when either audio has a high enough bitrate to fill up a\n    // source buffer, or video fills without enough room for audio to append (and without\n    // the availability of clearing out seconds of back buffer to make room for audio).\n    // But it might still be good to handle this case in the future as a TODO.\n\n\n    this.waitingOnRemove_ = true;\n    this.callQueue_.push(this.appendToSourceBuffer_.bind(this, {\n      segmentInfo: segmentInfo,\n      type: type,\n      bytes: bytes\n    }));\n    var currentTime = this.currentTime_(); // Try to remove as much audio and video as possible to make room for new content\n    // before retrying.\n\n    var timeToRemoveUntil = currentTime - MIN_BACK_BUFFER;\n    this.logger_(\"On QUOTA_EXCEEDED_ERR, removing audio/video from 0 to \" + timeToRemoveUntil);\n    this.remove(0, timeToRemoveUntil, function () {\n      _this3.logger_(\"On QUOTA_EXCEEDED_ERR, retrying append in \" + MIN_BACK_BUFFER + \"s\");\n\n      _this3.waitingOnRemove_ = false; // wait the length of time alotted in the back buffer to prevent wasted\n      // attempts (since we can't clear less than the minimum)\n\n      _this3.quotaExceededErrorRetryTimeout_ = window$1.setTimeout(function () {\n        _this3.logger_('On QUOTA_EXCEEDED_ERR, re-processing call queue');\n\n        _this3.quotaExceededErrorRetryTimeout_ = null;\n\n        _this3.processCallQueue_();\n      }, MIN_BACK_BUFFER * 1000);\n    }, true);\n  };\n\n  _proto.handleAppendError_ = function handleAppendError_(_ref6, error) {\n    var segmentInfo = _ref6.segmentInfo,\n        type = _ref6.type,\n        bytes = _ref6.bytes; // if there's no error, nothing to do\n\n    if (!error) {\n      return;\n    }\n\n    if (error.code === QUOTA_EXCEEDED_ERR) {\n      this.handleQuotaExceededError_({\n        segmentInfo: segmentInfo,\n        type: type,\n        bytes: bytes\n      }); // A quota exceeded error should be recoverable with a future re-append, so no need\n      // to trigger an append error.\n\n      return;\n    }\n\n    this.logger_('Received non QUOTA_EXCEEDED_ERR on append', error);\n    this.error(type + \" append of \" + bytes.length + \"b failed for segment \" + (\"#\" + segmentInfo.mediaIndex + \" in playlist \" + segmentInfo.playlist.id)); // If an append errors, we often can't recover.\n    // (see https://w3c.github.io/media-source/#sourcebuffer-append-error).\n    //\n    // Trigger a special error so that it can be handled separately from normal,\n    // recoverable errors.\n\n    this.trigger('appenderror');\n  };\n\n  _proto.appendToSourceBuffer_ = function appendToSourceBuffer_(_ref7) {\n    var segmentInfo = _ref7.segmentInfo,\n        type = _ref7.type,\n        initSegment = _ref7.initSegment,\n        data = _ref7.data,\n        bytes = _ref7.bytes; // If this is a re-append, bytes were already created and don't need to be recreated\n\n    if (!bytes) {\n      var segments = [data];\n      var byteLength = data.byteLength;\n\n      if (initSegment) {\n        // if the media initialization segment is changing, append it before the content\n        // segment\n        segments.unshift(initSegment);\n        byteLength += initSegment.byteLength;\n      } // Technically we should be OK appending the init segment separately, however, we\n      // haven't yet tested that, and prepending is how we have always done things.\n\n\n      bytes = concatSegments({\n        bytes: byteLength,\n        segments: segments\n      });\n    }\n\n    this.sourceUpdater_.appendBuffer({\n      segmentInfo: segmentInfo,\n      type: type,\n      bytes: bytes\n    }, this.handleAppendError_.bind(this, {\n      segmentInfo: segmentInfo,\n      type: type,\n      bytes: bytes\n    }));\n  };\n\n  _proto.handleSegmentTimingInfo_ = function handleSegmentTimingInfo_(type, requestId, segmentTimingInfo) {\n    if (!this.pendingSegment_ || requestId !== this.pendingSegment_.requestId) {\n      return;\n    }\n\n    var segment = this.pendingSegment_.segment;\n    var timingInfoProperty = type + \"TimingInfo\";\n\n    if (!segment[timingInfoProperty]) {\n      segment[timingInfoProperty] = {};\n    }\n\n    segment[timingInfoProperty].transmuxerPrependedSeconds = segmentTimingInfo.prependedContentDuration || 0;\n    segment[timingInfoProperty].transmuxedPresentationStart = segmentTimingInfo.start.presentation;\n    segment[timingInfoProperty].transmuxedDecodeStart = segmentTimingInfo.start.decode;\n    segment[timingInfoProperty].transmuxedPresentationEnd = segmentTimingInfo.end.presentation;\n    segment[timingInfoProperty].transmuxedDecodeEnd = segmentTimingInfo.end.decode; // mainly used as a reference for debugging\n\n    segment[timingInfoProperty].baseMediaDecodeTime = segmentTimingInfo.baseMediaDecodeTime;\n  };\n\n  _proto.appendData_ = function appendData_(segmentInfo, result) {\n    var type = result.type,\n        data = result.data;\n\n    if (!data || !data.byteLength) {\n      return;\n    }\n\n    if (type === 'audio' && this.audioDisabled_) {\n      return;\n    }\n\n    var initSegment = this.getInitSegmentAndUpdateState_({\n      type: type,\n      initSegment: result.initSegment,\n      playlist: segmentInfo.playlist,\n      map: segmentInfo.isFmp4 ? segmentInfo.segment.map : null\n    });\n    this.appendToSourceBuffer_({\n      segmentInfo: segmentInfo,\n      type: type,\n      initSegment: initSegment,\n      data: data\n    });\n  }\n  /**\n   * load a specific segment from a request into the buffer\n   *\n   * @private\n   */\n  ;\n\n  _proto.loadSegment_ = function loadSegment_(segmentInfo) {\n    var _this4 = this;\n\n    this.state = 'WAITING';\n    this.pendingSegment_ = segmentInfo;\n    this.trimBackBuffer_(segmentInfo);\n\n    if (typeof segmentInfo.timestampOffset === 'number') {\n      if (this.transmuxer_) {\n        this.transmuxer_.postMessage({\n          action: 'clearAllMp4Captions'\n        });\n      }\n    }\n\n    if (!this.hasEnoughInfoToLoad_()) {\n      this.loadQueue_.push(function () {\n        // regenerate the audioAppendStart, timestampOffset, etc as they\n        // may have changed since this function was added to the queue.\n        var options = _extends({}, segmentInfo, {\n          forceTimestampOffset: true\n        });\n\n        _extends(segmentInfo, _this4.generateSegmentInfo_(options));\n\n        _this4.isPendingTimestampOffset_ = false;\n\n        _this4.updateTransmuxerAndRequestSegment_(segmentInfo);\n      });\n      return;\n    }\n\n    this.updateTransmuxerAndRequestSegment_(segmentInfo);\n  };\n\n  _proto.updateTransmuxerAndRequestSegment_ = function updateTransmuxerAndRequestSegment_(segmentInfo) {\n    var _this5 = this; // We'll update the source buffer's timestamp offset once we have transmuxed data, but\n    // the transmuxer still needs to be updated before then.\n    //\n    // Even though keepOriginalTimestamps is set to true for the transmuxer, timestamp\n    // offset must be passed to the transmuxer for stream correcting adjustments.\n\n\n    if (this.shouldUpdateTransmuxerTimestampOffset_(segmentInfo.timestampOffset)) {\n      this.gopBuffer_.length = 0; // gopsToAlignWith was set before the GOP buffer was cleared\n\n      segmentInfo.gopsToAlignWith = [];\n      this.timeMapping_ = 0; // reset values in the transmuxer since a discontinuity should start fresh\n\n      this.transmuxer_.postMessage({\n        action: 'reset'\n      });\n      this.transmuxer_.postMessage({\n        action: 'setTimestampOffset',\n        timestampOffset: segmentInfo.timestampOffset\n      });\n    }\n\n    var simpleSegment = this.createSimplifiedSegmentObj_(segmentInfo);\n    var isEndOfStream = this.isEndOfStream_(segmentInfo.mediaIndex, segmentInfo.playlist, segmentInfo.partIndex);\n    var isWalkingForward = this.mediaIndex !== null;\n    var isDiscontinuity = segmentInfo.timeline !== this.currentTimeline_ && // currentTimeline starts at -1, so we shouldn't end the timeline switching to 0,\n    // the first timeline\n    segmentInfo.timeline > 0;\n    var isEndOfTimeline = isEndOfStream || isWalkingForward && isDiscontinuity;\n    this.logger_(\"Requesting \" + segmentInfoString(segmentInfo)); // If there's an init segment associated with this segment, but it is not cached (identified by a lack of bytes),\n    // then this init segment has never been seen before and should be appended.\n    //\n    // At this point the content type (audio/video or both) is not yet known, but it should be safe to set\n    // both to true and leave the decision of whether to append the init segment to append time.\n\n    if (simpleSegment.map && !simpleSegment.map.bytes) {\n      this.logger_('going to request init segment.');\n      this.appendInitSegment_ = {\n        video: true,\n        audio: true\n      };\n    }\n\n    segmentInfo.abortRequests = mediaSegmentRequest({\n      xhr: this.vhs_.xhr,\n      xhrOptions: this.xhrOptions_,\n      decryptionWorker: this.decrypter_,\n      segment: simpleSegment,\n      abortFn: this.handleAbort_.bind(this, segmentInfo),\n      progressFn: this.handleProgress_.bind(this),\n      trackInfoFn: this.handleTrackInfo_.bind(this),\n      timingInfoFn: this.handleTimingInfo_.bind(this),\n      videoSegmentTimingInfoFn: this.handleSegmentTimingInfo_.bind(this, 'video', segmentInfo.requestId),\n      audioSegmentTimingInfoFn: this.handleSegmentTimingInfo_.bind(this, 'audio', segmentInfo.requestId),\n      captionsFn: this.handleCaptions_.bind(this),\n      isEndOfTimeline: isEndOfTimeline,\n      endedTimelineFn: function endedTimelineFn() {\n        _this5.logger_('received endedtimeline callback');\n      },\n      id3Fn: this.handleId3_.bind(this),\n      dataFn: this.handleData_.bind(this),\n      doneFn: this.segmentRequestFinished_.bind(this),\n      onTransmuxerLog: function onTransmuxerLog(_ref8) {\n        var message = _ref8.message,\n            level = _ref8.level,\n            stream = _ref8.stream;\n\n        _this5.logger_(segmentInfoString(segmentInfo) + \" logged from transmuxer stream \" + stream + \" as a \" + level + \": \" + message);\n      }\n    });\n  }\n  /**\n   * trim the back buffer so that we don't have too much data\n   * in the source buffer\n   *\n   * @private\n   *\n   * @param {Object} segmentInfo - the current segment\n   */\n  ;\n\n  _proto.trimBackBuffer_ = function trimBackBuffer_(segmentInfo) {\n    var removeToTime = safeBackBufferTrimTime(this.seekable_(), this.currentTime_(), this.playlist_.targetDuration || 10); // Chrome has a hard limit of 150MB of\n    // buffer and a very conservative \"garbage collector\"\n    // We manually clear out the old buffer to ensure\n    // we don't trigger the QuotaExceeded error\n    // on the source buffer during subsequent appends\n\n    if (removeToTime > 0) {\n      this.remove(0, removeToTime);\n    }\n  }\n  /**\n   * created a simplified copy of the segment object with just the\n   * information necessary to perform the XHR and decryption\n   *\n   * @private\n   *\n   * @param {Object} segmentInfo - the current segment\n   * @return {Object} a simplified segment object copy\n   */\n  ;\n\n  _proto.createSimplifiedSegmentObj_ = function createSimplifiedSegmentObj_(segmentInfo) {\n    var segment = segmentInfo.segment;\n    var part = segmentInfo.part;\n    var simpleSegment = {\n      resolvedUri: part ? part.resolvedUri : segment.resolvedUri,\n      byterange: part ? part.byterange : segment.byterange,\n      requestId: segmentInfo.requestId,\n      transmuxer: segmentInfo.transmuxer,\n      audioAppendStart: segmentInfo.audioAppendStart,\n      gopsToAlignWith: segmentInfo.gopsToAlignWith,\n      part: segmentInfo.part\n    };\n    var previousSegment = segmentInfo.playlist.segments[segmentInfo.mediaIndex - 1];\n\n    if (previousSegment && previousSegment.timeline === segment.timeline) {\n      // The baseStartTime of a segment is used to handle rollover when probing the TS\n      // segment to retrieve timing information. Since the probe only looks at the media's\n      // times (e.g., PTS and DTS values of the segment), and doesn't consider the\n      // player's time (e.g., player.currentTime()), baseStartTime should reflect the\n      // media time as well. transmuxedDecodeEnd represents the end time of a segment, in\n      // seconds of media time, so should be used here. The previous segment is used since\n      // the end of the previous segment should represent the beginning of the current\n      // segment, so long as they are on the same timeline.\n      if (previousSegment.videoTimingInfo) {\n        simpleSegment.baseStartTime = previousSegment.videoTimingInfo.transmuxedDecodeEnd;\n      } else if (previousSegment.audioTimingInfo) {\n        simpleSegment.baseStartTime = previousSegment.audioTimingInfo.transmuxedDecodeEnd;\n      }\n    }\n\n    if (segment.key) {\n      // if the media sequence is greater than 2^32, the IV will be incorrect\n      // assuming 10s segments, that would be about 1300 years\n      var iv = segment.key.iv || new Uint32Array([0, 0, 0, segmentInfo.mediaIndex + segmentInfo.playlist.mediaSequence]);\n      simpleSegment.key = this.segmentKey(segment.key);\n      simpleSegment.key.iv = iv;\n    }\n\n    if (segment.map) {\n      simpleSegment.map = this.initSegmentForMap(segment.map);\n    }\n\n    return simpleSegment;\n  };\n\n  _proto.saveTransferStats_ = function saveTransferStats_(stats) {\n    // every request counts as a media request even if it has been aborted\n    // or canceled due to a timeout\n    this.mediaRequests += 1;\n\n    if (stats) {\n      this.mediaBytesTransferred += stats.bytesReceived;\n      this.mediaTransferDuration += stats.roundTripTime;\n    }\n  };\n\n  _proto.saveBandwidthRelatedStats_ = function saveBandwidthRelatedStats_(duration, stats) {\n    // byteLength will be used for throughput, and should be based on bytes receieved,\n    // which we only know at the end of the request and should reflect total bytes\n    // downloaded rather than just bytes processed from components of the segment\n    this.pendingSegment_.byteLength = stats.bytesReceived;\n\n    if (duration < MIN_SEGMENT_DURATION_TO_SAVE_STATS) {\n      this.logger_(\"Ignoring segment's bandwidth because its duration of \" + duration + (\" is less than the min to record \" + MIN_SEGMENT_DURATION_TO_SAVE_STATS));\n      return;\n    }\n\n    this.bandwidth = stats.bandwidth;\n    this.roundTrip = stats.roundTripTime;\n  };\n\n  _proto.handleTimeout_ = function handleTimeout_() {\n    // although the VTT segment loader bandwidth isn't really used, it's good to\n    // maintain functinality between segment loaders\n    this.mediaRequestsTimedout += 1;\n    this.bandwidth = 1;\n    this.roundTrip = NaN;\n    this.trigger('bandwidthupdate');\n  }\n  /**\n   * Handle the callback from the segmentRequest function and set the\n   * associated SegmentLoader state and errors if necessary\n   *\n   * @private\n   */\n  ;\n\n  _proto.segmentRequestFinished_ = function segmentRequestFinished_(error, simpleSegment, result) {\n    // TODO handle special cases, e.g., muxed audio/video but only audio in the segment\n    // check the call queue directly since this function doesn't need to deal with any\n    // data, and can continue even if the source buffers are not set up and we didn't get\n    // any data from the segment\n    if (this.callQueue_.length) {\n      this.callQueue_.push(this.segmentRequestFinished_.bind(this, error, simpleSegment, result));\n      return;\n    }\n\n    this.saveTransferStats_(simpleSegment.stats); // The request was aborted and the SegmentLoader has already been reset\n\n    if (!this.pendingSegment_) {\n      return;\n    } // the request was aborted and the SegmentLoader has already started\n    // another request. this can happen when the timeout for an aborted\n    // request triggers due to a limitation in the XHR library\n    // do not count this as any sort of request or we risk double-counting\n\n\n    if (simpleSegment.requestId !== this.pendingSegment_.requestId) {\n      return;\n    } // an error occurred from the active pendingSegment_ so reset everything\n\n\n    if (error) {\n      this.pendingSegment_ = null;\n      this.state = 'READY'; // aborts are not a true error condition and nothing corrective needs to be done\n\n      if (error.code === REQUEST_ERRORS.ABORTED) {\n        return;\n      }\n\n      this.pause(); // the error is really just that at least one of the requests timed-out\n      // set the bandwidth to a very low value and trigger an ABR switch to\n      // take emergency action\n\n      if (error.code === REQUEST_ERRORS.TIMEOUT) {\n        this.handleTimeout_();\n        return;\n      } // if control-flow has arrived here, then the error is real\n      // emit an error event to blacklist the current playlist\n\n\n      this.mediaRequestsErrored += 1;\n      this.error(error);\n      this.trigger('error');\n      return;\n    }\n\n    var segmentInfo = this.pendingSegment_; // the response was a success so set any bandwidth stats the request\n    // generated for ABR purposes\n\n    this.saveBandwidthRelatedStats_(segmentInfo.duration, simpleSegment.stats);\n    segmentInfo.endOfAllRequests = simpleSegment.endOfAllRequests;\n\n    if (result.gopInfo) {\n      this.gopBuffer_ = updateGopBuffer(this.gopBuffer_, result.gopInfo, this.safeAppend_);\n    } // Although we may have already started appending on progress, we shouldn't switch the\n    // state away from loading until we are officially done loading the segment data.\n\n\n    this.state = 'APPENDING'; // used for testing\n\n    this.trigger('appending');\n    this.waitForAppendsToComplete_(segmentInfo);\n  };\n\n  _proto.setTimeMapping_ = function setTimeMapping_(timeline) {\n    var timelineMapping = this.syncController_.mappingForTimeline(timeline);\n\n    if (timelineMapping !== null) {\n      this.timeMapping_ = timelineMapping;\n    }\n  };\n\n  _proto.updateMediaSecondsLoaded_ = function updateMediaSecondsLoaded_(segment) {\n    if (typeof segment.start === 'number' && typeof segment.end === 'number') {\n      this.mediaSecondsLoaded += segment.end - segment.start;\n    } else {\n      this.mediaSecondsLoaded += segment.duration;\n    }\n  };\n\n  _proto.shouldUpdateTransmuxerTimestampOffset_ = function shouldUpdateTransmuxerTimestampOffset_(timestampOffset) {\n    if (timestampOffset === null) {\n      return false;\n    } // note that we're potentially using the same timestamp offset for both video and\n    // audio\n\n\n    if (this.loaderType_ === 'main' && timestampOffset !== this.sourceUpdater_.videoTimestampOffset()) {\n      return true;\n    }\n\n    if (!this.audioDisabled_ && timestampOffset !== this.sourceUpdater_.audioTimestampOffset()) {\n      return true;\n    }\n\n    return false;\n  };\n\n  _proto.trueSegmentStart_ = function trueSegmentStart_(_ref9) {\n    var currentStart = _ref9.currentStart,\n        playlist = _ref9.playlist,\n        mediaIndex = _ref9.mediaIndex,\n        firstVideoFrameTimeForData = _ref9.firstVideoFrameTimeForData,\n        currentVideoTimestampOffset = _ref9.currentVideoTimestampOffset,\n        useVideoTimingInfo = _ref9.useVideoTimingInfo,\n        videoTimingInfo = _ref9.videoTimingInfo,\n        audioTimingInfo = _ref9.audioTimingInfo;\n\n    if (typeof currentStart !== 'undefined') {\n      // if start was set once, keep using it\n      return currentStart;\n    }\n\n    if (!useVideoTimingInfo) {\n      return audioTimingInfo.start;\n    }\n\n    var previousSegment = playlist.segments[mediaIndex - 1]; // The start of a segment should be the start of the first full frame contained\n    // within that segment. Since the transmuxer maintains a cache of incomplete data\n    // from and/or the last frame seen, the start time may reflect a frame that starts\n    // in the previous segment. Check for that case and ensure the start time is\n    // accurate for the segment.\n\n    if (mediaIndex === 0 || !previousSegment || typeof previousSegment.start === 'undefined' || previousSegment.end !== firstVideoFrameTimeForData + currentVideoTimestampOffset) {\n      return firstVideoFrameTimeForData;\n    }\n\n    return videoTimingInfo.start;\n  };\n\n  _proto.waitForAppendsToComplete_ = function waitForAppendsToComplete_(segmentInfo) {\n    var trackInfo = this.getCurrentMediaInfo_(segmentInfo);\n\n    if (!trackInfo) {\n      this.error({\n        message: 'No starting media returned, likely due to an unsupported media format.',\n        blacklistDuration: Infinity\n      });\n      this.trigger('error');\n      return;\n    } // Although transmuxing is done, appends may not yet be finished. Throw a marker\n    // on each queue this loader is responsible for to ensure that the appends are\n    // complete.\n\n\n    var hasAudio = trackInfo.hasAudio,\n        hasVideo = trackInfo.hasVideo,\n        isMuxed = trackInfo.isMuxed;\n    var waitForVideo = this.loaderType_ === 'main' && hasVideo;\n    var waitForAudio = !this.audioDisabled_ && hasAudio && !isMuxed;\n    segmentInfo.waitingOnAppends = 0; // segments with no data\n\n    if (!segmentInfo.hasAppendedData_) {\n      if (!segmentInfo.timingInfo && typeof segmentInfo.timestampOffset === 'number') {\n        // When there's no audio or video data in the segment, there's no audio or video\n        // timing information.\n        //\n        // If there's no audio or video timing information, then the timestamp offset\n        // can't be adjusted to the appropriate value for the transmuxer and source\n        // buffers.\n        //\n        // Therefore, the next segment should be used to set the timestamp offset.\n        this.isPendingTimestampOffset_ = true;\n      } // override settings for metadata only segments\n\n\n      segmentInfo.timingInfo = {\n        start: 0\n      };\n      segmentInfo.waitingOnAppends++;\n\n      if (!this.isPendingTimestampOffset_) {\n        // update the timestampoffset\n        this.updateSourceBufferTimestampOffset_(segmentInfo); // make sure the metadata queue is processed even though we have\n        // no video/audio data.\n\n        this.processMetadataQueue_();\n      } // append is \"done\" instantly with no data.\n\n\n      this.checkAppendsDone_(segmentInfo);\n      return;\n    } // Since source updater could call back synchronously, do the increments first.\n\n\n    if (waitForVideo) {\n      segmentInfo.waitingOnAppends++;\n    }\n\n    if (waitForAudio) {\n      segmentInfo.waitingOnAppends++;\n    }\n\n    if (waitForVideo) {\n      this.sourceUpdater_.videoQueueCallback(this.checkAppendsDone_.bind(this, segmentInfo));\n    }\n\n    if (waitForAudio) {\n      this.sourceUpdater_.audioQueueCallback(this.checkAppendsDone_.bind(this, segmentInfo));\n    }\n  };\n\n  _proto.checkAppendsDone_ = function checkAppendsDone_(segmentInfo) {\n    if (this.checkForAbort_(segmentInfo.requestId)) {\n      return;\n    }\n\n    segmentInfo.waitingOnAppends--;\n\n    if (segmentInfo.waitingOnAppends === 0) {\n      this.handleAppendsDone_();\n    }\n  };\n\n  _proto.checkForIllegalMediaSwitch = function checkForIllegalMediaSwitch(trackInfo) {\n    var illegalMediaSwitchError = illegalMediaSwitch(this.loaderType_, this.getCurrentMediaInfo_(), trackInfo);\n\n    if (illegalMediaSwitchError) {\n      this.error({\n        message: illegalMediaSwitchError,\n        blacklistDuration: Infinity\n      });\n      this.trigger('error');\n      return true;\n    }\n\n    return false;\n  };\n\n  _proto.updateSourceBufferTimestampOffset_ = function updateSourceBufferTimestampOffset_(segmentInfo) {\n    if (segmentInfo.timestampOffset === null || // we don't yet have the start for whatever media type (video or audio) has\n    // priority, timing-wise, so we must wait\n    typeof segmentInfo.timingInfo.start !== 'number' || // already updated the timestamp offset for this segment\n    segmentInfo.changedTimestampOffset || // the alt audio loader should not be responsible for setting the timestamp offset\n    this.loaderType_ !== 'main') {\n      return;\n    }\n\n    var didChange = false; // Primary timing goes by video, and audio is trimmed in the transmuxer, meaning that\n    // the timing info here comes from video. In the event that the audio is longer than\n    // the video, this will trim the start of the audio.\n    // This also trims any offset from 0 at the beginning of the media\n\n    segmentInfo.timestampOffset -= segmentInfo.timingInfo.start; // In the event that there are part segment downloads, each will try to update the\n    // timestamp offset. Retaining this bit of state prevents us from updating in the\n    // future (within the same segment), however, there may be a better way to handle it.\n\n    segmentInfo.changedTimestampOffset = true;\n\n    if (segmentInfo.timestampOffset !== this.sourceUpdater_.videoTimestampOffset()) {\n      this.sourceUpdater_.videoTimestampOffset(segmentInfo.timestampOffset);\n      didChange = true;\n    }\n\n    if (segmentInfo.timestampOffset !== this.sourceUpdater_.audioTimestampOffset()) {\n      this.sourceUpdater_.audioTimestampOffset(segmentInfo.timestampOffset);\n      didChange = true;\n    }\n\n    if (didChange) {\n      this.trigger('timestampoffset');\n    }\n  };\n\n  _proto.updateTimingInfoEnd_ = function updateTimingInfoEnd_(segmentInfo) {\n    segmentInfo.timingInfo = segmentInfo.timingInfo || {};\n    var trackInfo = this.getMediaInfo_();\n    var useVideoTimingInfo = this.loaderType_ === 'main' && trackInfo && trackInfo.hasVideo;\n    var prioritizedTimingInfo = useVideoTimingInfo && segmentInfo.videoTimingInfo ? segmentInfo.videoTimingInfo : segmentInfo.audioTimingInfo;\n\n    if (!prioritizedTimingInfo) {\n      return;\n    }\n\n    segmentInfo.timingInfo.end = typeof prioritizedTimingInfo.end === 'number' ? // End time may not exist in a case where we aren't parsing the full segment (one\n    // current example is the case of fmp4), so use the rough duration to calculate an\n    // end time.\n    prioritizedTimingInfo.end : prioritizedTimingInfo.start + segmentInfo.duration;\n  }\n  /**\n   * callback to run when appendBuffer is finished. detects if we are\n   * in a good state to do things with the data we got, or if we need\n   * to wait for more\n   *\n   * @private\n   */\n  ;\n\n  _proto.handleAppendsDone_ = function handleAppendsDone_() {\n    // appendsdone can cause an abort\n    if (this.pendingSegment_) {\n      this.trigger('appendsdone');\n    }\n\n    if (!this.pendingSegment_) {\n      this.state = 'READY'; // TODO should this move into this.checkForAbort to speed up requests post abort in\n      // all appending cases?\n\n      if (!this.paused()) {\n        this.monitorBuffer_();\n      }\n\n      return;\n    }\n\n    var segmentInfo = this.pendingSegment_; // Now that the end of the segment has been reached, we can set the end time. It's\n    // best to wait until all appends are done so we're sure that the primary media is\n    // finished (and we have its end time).\n\n    this.updateTimingInfoEnd_(segmentInfo);\n\n    if (this.shouldSaveSegmentTimingInfo_) {\n      // Timeline mappings should only be saved for the main loader. This is for multiple\n      // reasons:\n      //\n      // 1) Only one mapping is saved per timeline, meaning that if both the audio loader\n      //    and the main loader try to save the timeline mapping, whichever comes later\n      //    will overwrite the first. In theory this is OK, as the mappings should be the\n      //    same, however, it breaks for (2)\n      // 2) In the event of a live stream, the initial live point will make for a somewhat\n      //    arbitrary mapping. If audio and video streams are not perfectly in-sync, then\n      //    the mapping will be off for one of the streams, dependent on which one was\n      //    first saved (see (1)).\n      // 3) Primary timing goes by video in VHS, so the mapping should be video.\n      //\n      // Since the audio loader will wait for the main loader to load the first segment,\n      // the main loader will save the first timeline mapping, and ensure that there won't\n      // be a case where audio loads two segments without saving a mapping (thus leading\n      // to missing segment timing info).\n      this.syncController_.saveSegmentTimingInfo({\n        segmentInfo: segmentInfo,\n        shouldSaveTimelineMapping: this.loaderType_ === 'main'\n      });\n    }\n\n    var segmentDurationMessage = getTroublesomeSegmentDurationMessage(segmentInfo, this.sourceType_);\n\n    if (segmentDurationMessage) {\n      if (segmentDurationMessage.severity === 'warn') {\n        videojs.log.warn(segmentDurationMessage.message);\n      } else {\n        this.logger_(segmentDurationMessage.message);\n      }\n    }\n\n    this.recordThroughput_(segmentInfo);\n    this.pendingSegment_ = null;\n    this.state = 'READY';\n\n    if (segmentInfo.isSyncRequest) {\n      this.trigger('syncinfoupdate'); // if the sync request was not appended\n      // then it was not the correct segment.\n      // throw it away and use the data it gave us\n      // to get the correct one.\n\n      if (!segmentInfo.hasAppendedData_) {\n        this.logger_(\"Throwing away un-appended sync request \" + segmentInfoString(segmentInfo));\n        return;\n      }\n    }\n\n    this.logger_(\"Appended \" + segmentInfoString(segmentInfo));\n    this.addSegmentMetadataCue_(segmentInfo);\n    this.fetchAtBuffer_ = true;\n\n    if (this.currentTimeline_ !== segmentInfo.timeline) {\n      this.timelineChangeController_.lastTimelineChange({\n        type: this.loaderType_,\n        from: this.currentTimeline_,\n        to: segmentInfo.timeline\n      }); // If audio is not disabled, the main segment loader is responsible for updating\n      // the audio timeline as well. If the content is video only, this won't have any\n      // impact.\n\n      if (this.loaderType_ === 'main' && !this.audioDisabled_) {\n        this.timelineChangeController_.lastTimelineChange({\n          type: 'audio',\n          from: this.currentTimeline_,\n          to: segmentInfo.timeline\n        });\n      }\n    }\n\n    this.currentTimeline_ = segmentInfo.timeline; // We must update the syncinfo to recalculate the seekable range before\n    // the following conditional otherwise it may consider this a bad \"guess\"\n    // and attempt to resync when the post-update seekable window and live\n    // point would mean that this was the perfect segment to fetch\n\n    this.trigger('syncinfoupdate');\n    var segment = segmentInfo.segment;\n    var part = segmentInfo.part;\n    var badSegmentGuess = segment.end && this.currentTime_() - segment.end > segmentInfo.playlist.targetDuration * 3;\n    var badPartGuess = part && part.end && this.currentTime_() - part.end > segmentInfo.playlist.partTargetDuration * 3; // If we previously appended a segment/part that ends more than 3 part/targetDurations before\n    // the currentTime_ that means that our conservative guess was too conservative.\n    // In that case, reset the loader state so that we try to use any information gained\n    // from the previous request to create a new, more accurate, sync-point.\n\n    if (badSegmentGuess || badPartGuess) {\n      this.logger_(\"bad \" + (badSegmentGuess ? 'segment' : 'part') + \" \" + segmentInfoString(segmentInfo));\n      this.resetEverything();\n      return;\n    }\n\n    var isWalkingForward = this.mediaIndex !== null; // Don't do a rendition switch unless we have enough time to get a sync segment\n    // and conservatively guess\n\n    if (isWalkingForward) {\n      this.trigger('bandwidthupdate');\n    }\n\n    this.trigger('progress');\n    this.mediaIndex = segmentInfo.mediaIndex;\n    this.partIndex = segmentInfo.partIndex; // any time an update finishes and the last segment is in the\n    // buffer, end the stream. this ensures the \"ended\" event will\n    // fire if playback reaches that point.\n\n    if (this.isEndOfStream_(segmentInfo.mediaIndex, segmentInfo.playlist, segmentInfo.partIndex)) {\n      this.endOfStream();\n    } // used for testing\n\n\n    this.trigger('appended');\n\n    if (segmentInfo.hasAppendedData_) {\n      this.mediaAppends++;\n    }\n\n    if (!this.paused()) {\n      this.monitorBuffer_();\n    }\n  }\n  /**\n   * Records the current throughput of the decrypt, transmux, and append\n   * portion of the semgment pipeline. `throughput.rate` is a the cumulative\n   * moving average of the throughput. `throughput.count` is the number of\n   * data points in the average.\n   *\n   * @private\n   * @param {Object} segmentInfo the object returned by loadSegment\n   */\n  ;\n\n  _proto.recordThroughput_ = function recordThroughput_(segmentInfo) {\n    if (segmentInfo.duration < MIN_SEGMENT_DURATION_TO_SAVE_STATS) {\n      this.logger_(\"Ignoring segment's throughput because its duration of \" + segmentInfo.duration + (\" is less than the min to record \" + MIN_SEGMENT_DURATION_TO_SAVE_STATS));\n      return;\n    }\n\n    var rate = this.throughput.rate; // Add one to the time to ensure that we don't accidentally attempt to divide\n    // by zero in the case where the throughput is ridiculously high\n\n    var segmentProcessingTime = Date.now() - segmentInfo.endOfAllRequests + 1; // Multiply by 8000 to convert from bytes/millisecond to bits/second\n\n    var segmentProcessingThroughput = Math.floor(segmentInfo.byteLength / segmentProcessingTime * 8 * 1000); // This is just a cumulative moving average calculation:\n    //   newAvg = oldAvg + (sample - oldAvg) / (sampleCount + 1)\n\n    this.throughput.rate += (segmentProcessingThroughput - rate) / ++this.throughput.count;\n  }\n  /**\n   * Adds a cue to the segment-metadata track with some metadata information about the\n   * segment\n   *\n   * @private\n   * @param {Object} segmentInfo\n   *        the object returned by loadSegment\n   * @method addSegmentMetadataCue_\n   */\n  ;\n\n  _proto.addSegmentMetadataCue_ = function addSegmentMetadataCue_(segmentInfo) {\n    if (!this.segmentMetadataTrack_) {\n      return;\n    }\n\n    var segment = segmentInfo.segment;\n    var start = segment.start;\n    var end = segment.end; // Do not try adding the cue if the start and end times are invalid.\n\n    if (!finite(start) || !finite(end)) {\n      return;\n    }\n\n    removeCuesFromTrack(start, end, this.segmentMetadataTrack_);\n    var Cue = window$1.WebKitDataCue || window$1.VTTCue;\n    var value = {\n      custom: segment.custom,\n      dateTimeObject: segment.dateTimeObject,\n      dateTimeString: segment.dateTimeString,\n      bandwidth: segmentInfo.playlist.attributes.BANDWIDTH,\n      resolution: segmentInfo.playlist.attributes.RESOLUTION,\n      codecs: segmentInfo.playlist.attributes.CODECS,\n      byteLength: segmentInfo.byteLength,\n      uri: segmentInfo.uri,\n      timeline: segmentInfo.timeline,\n      playlist: segmentInfo.playlist.id,\n      start: start,\n      end: end\n    };\n    var data = JSON.stringify(value);\n    var cue = new Cue(start, end, data); // Attach the metadata to the value property of the cue to keep consistency between\n    // the differences of WebKitDataCue in safari and VTTCue in other browsers\n\n    cue.value = value;\n    this.segmentMetadataTrack_.addCue(cue);\n  };\n\n  return SegmentLoader;\n}(videojs.EventTarget);\n\nfunction noop() {}\n\nvar toTitleCase = function toTitleCase(string) {\n  if (typeof string !== 'string') {\n    return string;\n  }\n\n  return string.replace(/./, function (w) {\n    return w.toUpperCase();\n  });\n};\n\nvar bufferTypes = ['video', 'audio'];\n\nvar _updating = function updating(type, sourceUpdater) {\n  var sourceBuffer = sourceUpdater[type + \"Buffer\"];\n  return sourceBuffer && sourceBuffer.updating || sourceUpdater.queuePending[type];\n};\n\nvar nextQueueIndexOfType = function nextQueueIndexOfType(type, queue) {\n  for (var i = 0; i < queue.length; i++) {\n    var queueEntry = queue[i];\n\n    if (queueEntry.type === 'mediaSource') {\n      // If the next entry is a media source entry (uses multiple source buffers), block\n      // processing to allow it to go through first.\n      return null;\n    }\n\n    if (queueEntry.type === type) {\n      return i;\n    }\n  }\n\n  return null;\n};\n\nvar shiftQueue = function shiftQueue(type, sourceUpdater) {\n  if (sourceUpdater.queue.length === 0) {\n    return;\n  }\n\n  var queueIndex = 0;\n  var queueEntry = sourceUpdater.queue[queueIndex];\n\n  if (queueEntry.type === 'mediaSource') {\n    if (!sourceUpdater.updating() && sourceUpdater.mediaSource.readyState !== 'closed') {\n      sourceUpdater.queue.shift();\n      queueEntry.action(sourceUpdater);\n\n      if (queueEntry.doneFn) {\n        queueEntry.doneFn();\n      } // Only specific source buffer actions must wait for async updateend events. Media\n      // Source actions process synchronously. Therefore, both audio and video source\n      // buffers are now clear to process the next queue entries.\n\n\n      shiftQueue('audio', sourceUpdater);\n      shiftQueue('video', sourceUpdater);\n    } // Media Source actions require both source buffers, so if the media source action\n    // couldn't process yet (because one or both source buffers are busy), block other\n    // queue actions until both are available and the media source action can process.\n\n\n    return;\n  }\n\n  if (type === 'mediaSource') {\n    // If the queue was shifted by a media source action (this happens when pushing a\n    // media source action onto the queue), then it wasn't from an updateend event from an\n    // audio or video source buffer, so there's no change from previous state, and no\n    // processing should be done.\n    return;\n  } // Media source queue entries don't need to consider whether the source updater is\n  // started (i.e., source buffers are created) as they don't need the source buffers, but\n  // source buffer queue entries do.\n\n\n  if (!sourceUpdater.ready() || sourceUpdater.mediaSource.readyState === 'closed' || _updating(type, sourceUpdater)) {\n    return;\n  }\n\n  if (queueEntry.type !== type) {\n    queueIndex = nextQueueIndexOfType(type, sourceUpdater.queue);\n\n    if (queueIndex === null) {\n      // Either there's no queue entry that uses this source buffer type in the queue, or\n      // there's a media source queue entry before the next entry of this type, in which\n      // case wait for that action to process first.\n      return;\n    }\n\n    queueEntry = sourceUpdater.queue[queueIndex];\n  }\n\n  sourceUpdater.queue.splice(queueIndex, 1); // Keep a record that this source buffer type is in use.\n  //\n  // The queue pending operation must be set before the action is performed in the event\n  // that the action results in a synchronous event that is acted upon. For instance, if\n  // an exception is thrown that can be handled, it's possible that new actions will be\n  // appended to an empty queue and immediately executed, but would not have the correct\n  // pending information if this property was set after the action was performed.\n\n  sourceUpdater.queuePending[type] = queueEntry;\n  queueEntry.action(type, sourceUpdater);\n\n  if (!queueEntry.doneFn) {\n    // synchronous operation, process next entry\n    sourceUpdater.queuePending[type] = null;\n    shiftQueue(type, sourceUpdater);\n    return;\n  }\n};\n\nvar cleanupBuffer = function cleanupBuffer(type, sourceUpdater) {\n  var buffer = sourceUpdater[type + \"Buffer\"];\n  var titleType = toTitleCase(type);\n\n  if (!buffer) {\n    return;\n  }\n\n  buffer.removeEventListener('updateend', sourceUpdater[\"on\" + titleType + \"UpdateEnd_\"]);\n  buffer.removeEventListener('error', sourceUpdater[\"on\" + titleType + \"Error_\"]);\n  sourceUpdater.codecs[type] = null;\n  sourceUpdater[type + \"Buffer\"] = null;\n};\n\nvar inSourceBuffers = function inSourceBuffers(mediaSource, sourceBuffer) {\n  return mediaSource && sourceBuffer && Array.prototype.indexOf.call(mediaSource.sourceBuffers, sourceBuffer) !== -1;\n};\n\nvar actions = {\n  appendBuffer: function appendBuffer(bytes, segmentInfo, onError) {\n    return function (type, sourceUpdater) {\n      var sourceBuffer = sourceUpdater[type + \"Buffer\"]; // can't do anything if the media source / source buffer is null\n      // or the media source does not contain this source buffer.\n\n      if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {\n        return;\n      }\n\n      sourceUpdater.logger_(\"Appending segment \" + segmentInfo.mediaIndex + \"'s \" + bytes.length + \" bytes to \" + type + \"Buffer\");\n\n      try {\n        sourceBuffer.appendBuffer(bytes);\n      } catch (e) {\n        sourceUpdater.logger_(\"Error with code \" + e.code + \" \" + (e.code === QUOTA_EXCEEDED_ERR ? '(QUOTA_EXCEEDED_ERR) ' : '') + (\"when appending segment \" + segmentInfo.mediaIndex + \" to \" + type + \"Buffer\"));\n        sourceUpdater.queuePending[type] = null;\n        onError(e);\n      }\n    };\n  },\n  remove: function remove(start, end) {\n    return function (type, sourceUpdater) {\n      var sourceBuffer = sourceUpdater[type + \"Buffer\"]; // can't do anything if the media source / source buffer is null\n      // or the media source does not contain this source buffer.\n\n      if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {\n        return;\n      }\n\n      sourceUpdater.logger_(\"Removing \" + start + \" to \" + end + \" from \" + type + \"Buffer\");\n\n      try {\n        sourceBuffer.remove(start, end);\n      } catch (e) {\n        sourceUpdater.logger_(\"Remove \" + start + \" to \" + end + \" from \" + type + \"Buffer failed\");\n      }\n    };\n  },\n  timestampOffset: function timestampOffset(offset) {\n    return function (type, sourceUpdater) {\n      var sourceBuffer = sourceUpdater[type + \"Buffer\"]; // can't do anything if the media source / source buffer is null\n      // or the media source does not contain this source buffer.\n\n      if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {\n        return;\n      }\n\n      sourceUpdater.logger_(\"Setting \" + type + \"timestampOffset to \" + offset);\n      sourceBuffer.timestampOffset = offset;\n    };\n  },\n  callback: function callback(_callback) {\n    return function (type, sourceUpdater) {\n      _callback();\n    };\n  },\n  endOfStream: function endOfStream(error) {\n    return function (sourceUpdater) {\n      if (sourceUpdater.mediaSource.readyState !== 'open') {\n        return;\n      }\n\n      sourceUpdater.logger_(\"Calling mediaSource endOfStream(\" + (error || '') + \")\");\n\n      try {\n        sourceUpdater.mediaSource.endOfStream(error);\n      } catch (e) {\n        videojs.log.warn('Failed to call media source endOfStream', e);\n      }\n    };\n  },\n  duration: function duration(_duration) {\n    return function (sourceUpdater) {\n      sourceUpdater.logger_(\"Setting mediaSource duration to \" + _duration);\n\n      try {\n        sourceUpdater.mediaSource.duration = _duration;\n      } catch (e) {\n        videojs.log.warn('Failed to set media source duration', e);\n      }\n    };\n  },\n  abort: function abort() {\n    return function (type, sourceUpdater) {\n      if (sourceUpdater.mediaSource.readyState !== 'open') {\n        return;\n      }\n\n      var sourceBuffer = sourceUpdater[type + \"Buffer\"]; // can't do anything if the media source / source buffer is null\n      // or the media source does not contain this source buffer.\n\n      if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {\n        return;\n      }\n\n      sourceUpdater.logger_(\"calling abort on \" + type + \"Buffer\");\n\n      try {\n        sourceBuffer.abort();\n      } catch (e) {\n        videojs.log.warn(\"Failed to abort on \" + type + \"Buffer\", e);\n      }\n    };\n  },\n  addSourceBuffer: function addSourceBuffer(type, codec) {\n    return function (sourceUpdater) {\n      var titleType = toTitleCase(type);\n      var mime = getMimeForCodec(codec);\n      sourceUpdater.logger_(\"Adding \" + type + \"Buffer with codec \" + codec + \" to mediaSource\");\n      var sourceBuffer = sourceUpdater.mediaSource.addSourceBuffer(mime);\n      sourceBuffer.addEventListener('updateend', sourceUpdater[\"on\" + titleType + \"UpdateEnd_\"]);\n      sourceBuffer.addEventListener('error', sourceUpdater[\"on\" + titleType + \"Error_\"]);\n      sourceUpdater.codecs[type] = codec;\n      sourceUpdater[type + \"Buffer\"] = sourceBuffer;\n    };\n  },\n  removeSourceBuffer: function removeSourceBuffer(type) {\n    return function (sourceUpdater) {\n      var sourceBuffer = sourceUpdater[type + \"Buffer\"];\n      cleanupBuffer(type, sourceUpdater); // can't do anything if the media source / source buffer is null\n      // or the media source does not contain this source buffer.\n\n      if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {\n        return;\n      }\n\n      sourceUpdater.logger_(\"Removing \" + type + \"Buffer with codec \" + sourceUpdater.codecs[type] + \" from mediaSource\");\n\n      try {\n        sourceUpdater.mediaSource.removeSourceBuffer(sourceBuffer);\n      } catch (e) {\n        videojs.log.warn(\"Failed to removeSourceBuffer \" + type + \"Buffer\", e);\n      }\n    };\n  },\n  changeType: function changeType(codec) {\n    return function (type, sourceUpdater) {\n      var sourceBuffer = sourceUpdater[type + \"Buffer\"];\n      var mime = getMimeForCodec(codec); // can't do anything if the media source / source buffer is null\n      // or the media source does not contain this source buffer.\n\n      if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {\n        return;\n      } // do not update codec if we don't need to.\n\n\n      if (sourceUpdater.codecs[type] === codec) {\n        return;\n      }\n\n      sourceUpdater.logger_(\"changing \" + type + \"Buffer codec from \" + sourceUpdater.codecs[type] + \" to \" + codec);\n      sourceBuffer.changeType(mime);\n      sourceUpdater.codecs[type] = codec;\n    };\n  }\n};\n\nvar pushQueue = function pushQueue(_ref) {\n  var type = _ref.type,\n      sourceUpdater = _ref.sourceUpdater,\n      action = _ref.action,\n      doneFn = _ref.doneFn,\n      name = _ref.name;\n  sourceUpdater.queue.push({\n    type: type,\n    action: action,\n    doneFn: doneFn,\n    name: name\n  });\n  shiftQueue(type, sourceUpdater);\n};\n\nvar onUpdateend = function onUpdateend(type, sourceUpdater) {\n  return function (e) {\n    // Although there should, in theory, be a pending action for any updateend receieved,\n    // there are some actions that may trigger updateend events without set definitions in\n    // the w3c spec. For instance, setting the duration on the media source may trigger\n    // updateend events on source buffers. This does not appear to be in the spec. As such,\n    // if we encounter an updateend without a corresponding pending action from our queue\n    // for that source buffer type, process the next action.\n    if (sourceUpdater.queuePending[type]) {\n      var doneFn = sourceUpdater.queuePending[type].doneFn;\n      sourceUpdater.queuePending[type] = null;\n\n      if (doneFn) {\n        // if there's an error, report it\n        doneFn(sourceUpdater[type + \"Error_\"]);\n      }\n    }\n\n    shiftQueue(type, sourceUpdater);\n  };\n};\n/**\n * A queue of callbacks to be serialized and applied when a\n * MediaSource and its associated SourceBuffers are not in the\n * updating state. It is used by the segment loader to update the\n * underlying SourceBuffers when new data is loaded, for instance.\n *\n * @class SourceUpdater\n * @param {MediaSource} mediaSource the MediaSource to create the SourceBuffer from\n * @param {string} mimeType the desired MIME type of the underlying SourceBuffer\n */\n\n\nvar SourceUpdater = /*#__PURE__*/function (_videojs$EventTarget) {\n  _inheritsLoose(SourceUpdater, _videojs$EventTarget);\n\n  function SourceUpdater(mediaSource) {\n    var _this;\n\n    _this = _videojs$EventTarget.call(this) || this;\n    _this.mediaSource = mediaSource;\n\n    _this.sourceopenListener_ = function () {\n      return shiftQueue('mediaSource', _assertThisInitialized(_this));\n    };\n\n    _this.mediaSource.addEventListener('sourceopen', _this.sourceopenListener_);\n\n    _this.logger_ = logger('SourceUpdater'); // initial timestamp offset is 0\n\n    _this.audioTimestampOffset_ = 0;\n    _this.videoTimestampOffset_ = 0;\n    _this.queue = [];\n    _this.queuePending = {\n      audio: null,\n      video: null\n    };\n    _this.delayedAudioAppendQueue_ = [];\n    _this.videoAppendQueued_ = false;\n    _this.codecs = {};\n    _this.onVideoUpdateEnd_ = onUpdateend('video', _assertThisInitialized(_this));\n    _this.onAudioUpdateEnd_ = onUpdateend('audio', _assertThisInitialized(_this));\n\n    _this.onVideoError_ = function (e) {\n      // used for debugging\n      _this.videoError_ = e;\n    };\n\n    _this.onAudioError_ = function (e) {\n      // used for debugging\n      _this.audioError_ = e;\n    };\n\n    _this.createdSourceBuffers_ = false;\n    _this.initializedEme_ = false;\n    _this.triggeredReady_ = false;\n    return _this;\n  }\n\n  var _proto = SourceUpdater.prototype;\n\n  _proto.initializedEme = function initializedEme() {\n    this.initializedEme_ = true;\n    this.triggerReady();\n  };\n\n  _proto.hasCreatedSourceBuffers = function hasCreatedSourceBuffers() {\n    // if false, likely waiting on one of the segment loaders to get enough data to create\n    // source buffers\n    return this.createdSourceBuffers_;\n  };\n\n  _proto.hasInitializedAnyEme = function hasInitializedAnyEme() {\n    return this.initializedEme_;\n  };\n\n  _proto.ready = function ready() {\n    return this.hasCreatedSourceBuffers() && this.hasInitializedAnyEme();\n  };\n\n  _proto.createSourceBuffers = function createSourceBuffers(codecs) {\n    if (this.hasCreatedSourceBuffers()) {\n      // already created them before\n      return;\n    } // the intial addOrChangeSourceBuffers will always be\n    // two add buffers.\n\n\n    this.addOrChangeSourceBuffers(codecs);\n    this.createdSourceBuffers_ = true;\n    this.trigger('createdsourcebuffers');\n    this.triggerReady();\n  };\n\n  _proto.triggerReady = function triggerReady() {\n    // only allow ready to be triggered once, this prevents the case\n    // where:\n    // 1. we trigger createdsourcebuffers\n    // 2. ie 11 synchronously initializates eme\n    // 3. the synchronous initialization causes us to trigger ready\n    // 4. We go back to the ready check in createSourceBuffers and ready is triggered again.\n    if (this.ready() && !this.triggeredReady_) {\n      this.triggeredReady_ = true;\n      this.trigger('ready');\n    }\n  }\n  /**\n   * Add a type of source buffer to the media source.\n   *\n   * @param {string} type\n   *        The type of source buffer to add.\n   *\n   * @param {string} codec\n   *        The codec to add the source buffer with.\n   */\n  ;\n\n  _proto.addSourceBuffer = function addSourceBuffer(type, codec) {\n    pushQueue({\n      type: 'mediaSource',\n      sourceUpdater: this,\n      action: actions.addSourceBuffer(type, codec),\n      name: 'addSourceBuffer'\n    });\n  }\n  /**\n   * call abort on a source buffer.\n   *\n   * @param {string} type\n   *        The type of source buffer to call abort on.\n   */\n  ;\n\n  _proto.abort = function abort(type) {\n    pushQueue({\n      type: type,\n      sourceUpdater: this,\n      action: actions.abort(type),\n      name: 'abort'\n    });\n  }\n  /**\n   * Call removeSourceBuffer and remove a specific type\n   * of source buffer on the mediaSource.\n   *\n   * @param {string} type\n   *        The type of source buffer to remove.\n   */\n  ;\n\n  _proto.removeSourceBuffer = function removeSourceBuffer(type) {\n    if (!this.canRemoveSourceBuffer()) {\n      videojs.log.error('removeSourceBuffer is not supported!');\n      return;\n    }\n\n    pushQueue({\n      type: 'mediaSource',\n      sourceUpdater: this,\n      action: actions.removeSourceBuffer(type),\n      name: 'removeSourceBuffer'\n    });\n  }\n  /**\n   * Whether or not the removeSourceBuffer function is supported\n   * on the mediaSource.\n   *\n   * @return {boolean}\n   *          if removeSourceBuffer can be called.\n   */\n  ;\n\n  _proto.canRemoveSourceBuffer = function canRemoveSourceBuffer() {\n    // IE reports that it supports removeSourceBuffer, but often throws\n    // errors when attempting to use the function. So we report that it\n    // does not support removeSourceBuffer. As of Firefox 83 removeSourceBuffer\n    // throws errors, so we report that it does not support this as well.\n    return !videojs.browser.IE_VERSION && !videojs.browser.IS_FIREFOX && window$1.MediaSource && window$1.MediaSource.prototype && typeof window$1.MediaSource.prototype.removeSourceBuffer === 'function';\n  }\n  /**\n   * Whether or not the changeType function is supported\n   * on our SourceBuffers.\n   *\n   * @return {boolean}\n   *         if changeType can be called.\n   */\n  ;\n\n  SourceUpdater.canChangeType = function canChangeType() {\n    return window$1.SourceBuffer && window$1.SourceBuffer.prototype && typeof window$1.SourceBuffer.prototype.changeType === 'function';\n  }\n  /**\n   * Whether or not the changeType function is supported\n   * on our SourceBuffers.\n   *\n   * @return {boolean}\n   *         if changeType can be called.\n   */\n  ;\n\n  _proto.canChangeType = function canChangeType() {\n    return this.constructor.canChangeType();\n  }\n  /**\n   * Call the changeType function on a source buffer, given the code and type.\n   *\n   * @param {string} type\n   *        The type of source buffer to call changeType on.\n   *\n   * @param {string} codec\n   *        The codec string to change type with on the source buffer.\n   */\n  ;\n\n  _proto.changeType = function changeType(type, codec) {\n    if (!this.canChangeType()) {\n      videojs.log.error('changeType is not supported!');\n      return;\n    }\n\n    pushQueue({\n      type: type,\n      sourceUpdater: this,\n      action: actions.changeType(codec),\n      name: 'changeType'\n    });\n  }\n  /**\n   * Add source buffers with a codec or, if they are already created,\n   * call changeType on source buffers using changeType.\n   *\n   * @param {Object} codecs\n   *        Codecs to switch to\n   */\n  ;\n\n  _proto.addOrChangeSourceBuffers = function addOrChangeSourceBuffers(codecs) {\n    var _this2 = this;\n\n    if (!codecs || typeof codecs !== 'object' || Object.keys(codecs).length === 0) {\n      throw new Error('Cannot addOrChangeSourceBuffers to undefined codecs');\n    }\n\n    Object.keys(codecs).forEach(function (type) {\n      var codec = codecs[type];\n\n      if (!_this2.hasCreatedSourceBuffers()) {\n        return _this2.addSourceBuffer(type, codec);\n      }\n\n      if (_this2.canChangeType()) {\n        _this2.changeType(type, codec);\n      }\n    });\n  }\n  /**\n   * Queue an update to append an ArrayBuffer.\n   *\n   * @param {MediaObject} object containing audioBytes and/or videoBytes\n   * @param {Function} done the function to call when done\n   * @see http://www.w3.org/TR/media-source/#widl-SourceBuffer-appendBuffer-void-ArrayBuffer-data\n   */\n  ;\n\n  _proto.appendBuffer = function appendBuffer(options, doneFn) {\n    var _this3 = this;\n\n    var segmentInfo = options.segmentInfo,\n        type = options.type,\n        bytes = options.bytes;\n    this.processedAppend_ = true;\n\n    if (type === 'audio' && this.videoBuffer && !this.videoAppendQueued_) {\n      this.delayedAudioAppendQueue_.push([options, doneFn]);\n      this.logger_(\"delayed audio append of \" + bytes.length + \" until video append\");\n      return;\n    } // In the case of certain errors, for instance, QUOTA_EXCEEDED_ERR, updateend will\n    // not be fired. This means that the queue will be blocked until the next action\n    // taken by the segment-loader. Provide a mechanism for segment-loader to handle\n    // these errors by calling the doneFn with the specific error.\n\n\n    var onError = doneFn;\n    pushQueue({\n      type: type,\n      sourceUpdater: this,\n      action: actions.appendBuffer(bytes, segmentInfo || {\n        mediaIndex: -1\n      }, onError),\n      doneFn: doneFn,\n      name: 'appendBuffer'\n    });\n\n    if (type === 'video') {\n      this.videoAppendQueued_ = true;\n\n      if (!this.delayedAudioAppendQueue_.length) {\n        return;\n      }\n\n      var queue = this.delayedAudioAppendQueue_.slice();\n      this.logger_(\"queuing delayed audio \" + queue.length + \" appendBuffers\");\n      this.delayedAudioAppendQueue_.length = 0;\n      queue.forEach(function (que) {\n        _this3.appendBuffer.apply(_this3, que);\n      });\n    }\n  }\n  /**\n   * Get the audio buffer's buffered timerange.\n   *\n   * @return {TimeRange}\n   *         The audio buffer's buffered time range\n   */\n  ;\n\n  _proto.audioBuffered = function audioBuffered() {\n    // no media source/source buffer or it isn't in the media sources\n    // source buffer list\n    if (!inSourceBuffers(this.mediaSource, this.audioBuffer)) {\n      return videojs.createTimeRange();\n    }\n\n    return this.audioBuffer.buffered ? this.audioBuffer.buffered : videojs.createTimeRange();\n  }\n  /**\n   * Get the video buffer's buffered timerange.\n   *\n   * @return {TimeRange}\n   *         The video buffer's buffered time range\n   */\n  ;\n\n  _proto.videoBuffered = function videoBuffered() {\n    // no media source/source buffer or it isn't in the media sources\n    // source buffer list\n    if (!inSourceBuffers(this.mediaSource, this.videoBuffer)) {\n      return videojs.createTimeRange();\n    }\n\n    return this.videoBuffer.buffered ? this.videoBuffer.buffered : videojs.createTimeRange();\n  }\n  /**\n   * Get a combined video/audio buffer's buffered timerange.\n   *\n   * @return {TimeRange}\n   *         the combined time range\n   */\n  ;\n\n  _proto.buffered = function buffered() {\n    var video = inSourceBuffers(this.mediaSource, this.videoBuffer) ? this.videoBuffer : null;\n    var audio = inSourceBuffers(this.mediaSource, this.audioBuffer) ? this.audioBuffer : null;\n\n    if (audio && !video) {\n      return this.audioBuffered();\n    }\n\n    if (video && !audio) {\n      return this.videoBuffered();\n    }\n\n    return bufferIntersection(this.audioBuffered(), this.videoBuffered());\n  }\n  /**\n   * Add a callback to the queue that will set duration on the mediaSource.\n   *\n   * @param {number} duration\n   *        The duration to set\n   *\n   * @param {Function} [doneFn]\n   *        function to run after duration has been set.\n   */\n  ;\n\n  _proto.setDuration = function setDuration(duration, doneFn) {\n    if (doneFn === void 0) {\n      doneFn = noop;\n    } // In order to set the duration on the media source, it's necessary to wait for all\n    // source buffers to no longer be updating. \"If the updating attribute equals true on\n    // any SourceBuffer in sourceBuffers, then throw an InvalidStateError exception and\n    // abort these steps.\" (source: https://www.w3.org/TR/media-source/#attributes).\n\n\n    pushQueue({\n      type: 'mediaSource',\n      sourceUpdater: this,\n      action: actions.duration(duration),\n      name: 'duration',\n      doneFn: doneFn\n    });\n  }\n  /**\n   * Add a mediaSource endOfStream call to the queue\n   *\n   * @param {Error} [error]\n   *        Call endOfStream with an error\n   *\n   * @param {Function} [doneFn]\n   *        A function that should be called when the\n   *        endOfStream call has finished.\n   */\n  ;\n\n  _proto.endOfStream = function endOfStream(error, doneFn) {\n    if (error === void 0) {\n      error = null;\n    }\n\n    if (doneFn === void 0) {\n      doneFn = noop;\n    }\n\n    if (typeof error !== 'string') {\n      error = undefined;\n    } // In order to set the duration on the media source, it's necessary to wait for all\n    // source buffers to no longer be updating. \"If the updating attribute equals true on\n    // any SourceBuffer in sourceBuffers, then throw an InvalidStateError exception and\n    // abort these steps.\" (source: https://www.w3.org/TR/media-source/#attributes).\n\n\n    pushQueue({\n      type: 'mediaSource',\n      sourceUpdater: this,\n      action: actions.endOfStream(error),\n      name: 'endOfStream',\n      doneFn: doneFn\n    });\n  }\n  /**\n   * Queue an update to remove a time range from the buffer.\n   *\n   * @param {number} start where to start the removal\n   * @param {number} end where to end the removal\n   * @param {Function} [done=noop] optional callback to be executed when the remove\n   * operation is complete\n   * @see http://www.w3.org/TR/media-source/#widl-SourceBuffer-remove-void-double-start-unrestricted-double-end\n   */\n  ;\n\n  _proto.removeAudio = function removeAudio(start, end, done) {\n    if (done === void 0) {\n      done = noop;\n    }\n\n    if (!this.audioBuffered().length || this.audioBuffered().end(0) === 0) {\n      done();\n      return;\n    }\n\n    pushQueue({\n      type: 'audio',\n      sourceUpdater: this,\n      action: actions.remove(start, end),\n      doneFn: done,\n      name: 'remove'\n    });\n  }\n  /**\n   * Queue an update to remove a time range from the buffer.\n   *\n   * @param {number} start where to start the removal\n   * @param {number} end where to end the removal\n   * @param {Function} [done=noop] optional callback to be executed when the remove\n   * operation is complete\n   * @see http://www.w3.org/TR/media-source/#widl-SourceBuffer-remove-void-double-start-unrestricted-double-end\n   */\n  ;\n\n  _proto.removeVideo = function removeVideo(start, end, done) {\n    if (done === void 0) {\n      done = noop;\n    }\n\n    if (!this.videoBuffered().length || this.videoBuffered().end(0) === 0) {\n      done();\n      return;\n    }\n\n    pushQueue({\n      type: 'video',\n      sourceUpdater: this,\n      action: actions.remove(start, end),\n      doneFn: done,\n      name: 'remove'\n    });\n  }\n  /**\n   * Whether the underlying sourceBuffer is updating or not\n   *\n   * @return {boolean} the updating status of the SourceBuffer\n   */\n  ;\n\n  _proto.updating = function updating() {\n    // the audio/video source buffer is updating\n    if (_updating('audio', this) || _updating('video', this)) {\n      return true;\n    }\n\n    return false;\n  }\n  /**\n   * Set/get the timestampoffset on the audio SourceBuffer\n   *\n   * @return {number} the timestamp offset\n   */\n  ;\n\n  _proto.audioTimestampOffset = function audioTimestampOffset(offset) {\n    if (typeof offset !== 'undefined' && this.audioBuffer && // no point in updating if it's the same\n    this.audioTimestampOffset_ !== offset) {\n      pushQueue({\n        type: 'audio',\n        sourceUpdater: this,\n        action: actions.timestampOffset(offset),\n        name: 'timestampOffset'\n      });\n      this.audioTimestampOffset_ = offset;\n    }\n\n    return this.audioTimestampOffset_;\n  }\n  /**\n   * Set/get the timestampoffset on the video SourceBuffer\n   *\n   * @return {number} the timestamp offset\n   */\n  ;\n\n  _proto.videoTimestampOffset = function videoTimestampOffset(offset) {\n    if (typeof offset !== 'undefined' && this.videoBuffer && // no point in updating if it's the same\n    this.videoTimestampOffset !== offset) {\n      pushQueue({\n        type: 'video',\n        sourceUpdater: this,\n        action: actions.timestampOffset(offset),\n        name: 'timestampOffset'\n      });\n      this.videoTimestampOffset_ = offset;\n    }\n\n    return this.videoTimestampOffset_;\n  }\n  /**\n   * Add a function to the queue that will be called\n   * when it is its turn to run in the audio queue.\n   *\n   * @param {Function} callback\n   *        The callback to queue.\n   */\n  ;\n\n  _proto.audioQueueCallback = function audioQueueCallback(callback) {\n    if (!this.audioBuffer) {\n      return;\n    }\n\n    pushQueue({\n      type: 'audio',\n      sourceUpdater: this,\n      action: actions.callback(callback),\n      name: 'callback'\n    });\n  }\n  /**\n   * Add a function to the queue that will be called\n   * when it is its turn to run in the video queue.\n   *\n   * @param {Function} callback\n   *        The callback to queue.\n   */\n  ;\n\n  _proto.videoQueueCallback = function videoQueueCallback(callback) {\n    if (!this.videoBuffer) {\n      return;\n    }\n\n    pushQueue({\n      type: 'video',\n      sourceUpdater: this,\n      action: actions.callback(callback),\n      name: 'callback'\n    });\n  }\n  /**\n   * dispose of the source updater and the underlying sourceBuffer\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    var _this4 = this;\n\n    this.trigger('dispose');\n    bufferTypes.forEach(function (type) {\n      _this4.abort(type);\n\n      if (_this4.canRemoveSourceBuffer()) {\n        _this4.removeSourceBuffer(type);\n      } else {\n        _this4[type + \"QueueCallback\"](function () {\n          return cleanupBuffer(type, _this4);\n        });\n      }\n    });\n    this.videoAppendQueued_ = false;\n    this.delayedAudioAppendQueue_.length = 0;\n\n    if (this.sourceopenListener_) {\n      this.mediaSource.removeEventListener('sourceopen', this.sourceopenListener_);\n    }\n\n    this.off();\n  };\n\n  return SourceUpdater;\n}(videojs.EventTarget);\n\nvar uint8ToUtf8 = function uint8ToUtf8(uintArray) {\n  return decodeURIComponent(escape(String.fromCharCode.apply(null, uintArray)));\n};\n\nvar VTT_LINE_TERMINATORS = new Uint8Array('\\n\\n'.split('').map(function (_char3) {\n  return _char3.charCodeAt(0);\n}));\n/**\n * An object that manages segment loading and appending.\n *\n * @class VTTSegmentLoader\n * @param {Object} options required and optional options\n * @extends videojs.EventTarget\n */\n\nvar VTTSegmentLoader = /*#__PURE__*/function (_SegmentLoader) {\n  _inheritsLoose(VTTSegmentLoader, _SegmentLoader);\n\n  function VTTSegmentLoader(settings, options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    _this = _SegmentLoader.call(this, settings, options) || this; // SegmentLoader requires a MediaSource be specified or it will throw an error;\n    // however, VTTSegmentLoader has no need of a media source, so delete the reference\n\n    _this.mediaSource_ = null;\n    _this.subtitlesTrack_ = null;\n    _this.loaderType_ = 'subtitle';\n    _this.featuresNativeTextTracks_ = settings.featuresNativeTextTracks; // The VTT segment will have its own time mappings. Saving VTT segment timing info in\n    // the sync controller leads to improper behavior.\n\n    _this.shouldSaveSegmentTimingInfo_ = false;\n    return _this;\n  }\n\n  var _proto = VTTSegmentLoader.prototype;\n\n  _proto.createTransmuxer_ = function createTransmuxer_() {\n    // don't need to transmux any subtitles\n    return null;\n  }\n  /**\n   * Indicates which time ranges are buffered\n   *\n   * @return {TimeRange}\n   *         TimeRange object representing the current buffered ranges\n   */\n  ;\n\n  _proto.buffered_ = function buffered_() {\n    if (!this.subtitlesTrack_ || !this.subtitlesTrack_.cues || !this.subtitlesTrack_.cues.length) {\n      return videojs.createTimeRanges();\n    }\n\n    var cues = this.subtitlesTrack_.cues;\n    var start = cues[0].startTime;\n    var end = cues[cues.length - 1].startTime;\n    return videojs.createTimeRanges([[start, end]]);\n  }\n  /**\n   * Gets and sets init segment for the provided map\n   *\n   * @param {Object} map\n   *        The map object representing the init segment to get or set\n   * @param {boolean=} set\n   *        If true, the init segment for the provided map should be saved\n   * @return {Object}\n   *         map object for desired init segment\n   */\n  ;\n\n  _proto.initSegmentForMap = function initSegmentForMap(map, set) {\n    if (set === void 0) {\n      set = false;\n    }\n\n    if (!map) {\n      return null;\n    }\n\n    var id = initSegmentId(map);\n    var storedMap = this.initSegments_[id];\n\n    if (set && !storedMap && map.bytes) {\n      // append WebVTT line terminators to the media initialization segment if it exists\n      // to follow the WebVTT spec (https://w3c.github.io/webvtt/#file-structure) that\n      // requires two or more WebVTT line terminators between the WebVTT header and the\n      // rest of the file\n      var combinedByteLength = VTT_LINE_TERMINATORS.byteLength + map.bytes.byteLength;\n      var combinedSegment = new Uint8Array(combinedByteLength);\n      combinedSegment.set(map.bytes);\n      combinedSegment.set(VTT_LINE_TERMINATORS, map.bytes.byteLength);\n      this.initSegments_[id] = storedMap = {\n        resolvedUri: map.resolvedUri,\n        byterange: map.byterange,\n        bytes: combinedSegment\n      };\n    }\n\n    return storedMap || map;\n  }\n  /**\n   * Returns true if all configuration required for loading is present, otherwise false.\n   *\n   * @return {boolean} True if the all configuration is ready for loading\n   * @private\n   */\n  ;\n\n  _proto.couldBeginLoading_ = function couldBeginLoading_() {\n    return this.playlist_ && this.subtitlesTrack_ && !this.paused();\n  }\n  /**\n   * Once all the starting parameters have been specified, begin\n   * operation. This method should only be invoked from the INIT\n   * state.\n   *\n   * @private\n   */\n  ;\n\n  _proto.init_ = function init_() {\n    this.state = 'READY';\n    this.resetEverything();\n    return this.monitorBuffer_();\n  }\n  /**\n   * Set a subtitle track on the segment loader to add subtitles to\n   *\n   * @param {TextTrack=} track\n   *        The text track to add loaded subtitles to\n   * @return {TextTrack}\n   *        Returns the subtitles track\n   */\n  ;\n\n  _proto.track = function track(_track) {\n    if (typeof _track === 'undefined') {\n      return this.subtitlesTrack_;\n    }\n\n    this.subtitlesTrack_ = _track; // if we were unpaused but waiting for a sourceUpdater, start\n    // buffering now\n\n    if (this.state === 'INIT' && this.couldBeginLoading_()) {\n      this.init_();\n    }\n\n    return this.subtitlesTrack_;\n  }\n  /**\n   * Remove any data in the source buffer between start and end times\n   *\n   * @param {number} start - the start time of the region to remove from the buffer\n   * @param {number} end - the end time of the region to remove from the buffer\n   */\n  ;\n\n  _proto.remove = function remove(start, end) {\n    removeCuesFromTrack(start, end, this.subtitlesTrack_);\n  }\n  /**\n   * fill the buffer with segements unless the sourceBuffers are\n   * currently updating\n   *\n   * Note: this function should only ever be called by monitorBuffer_\n   * and never directly\n   *\n   * @private\n   */\n  ;\n\n  _proto.fillBuffer_ = function fillBuffer_() {\n    var _this2 = this; // see if we need to begin loading immediately\n\n\n    var segmentInfo = this.chooseNextRequest_();\n\n    if (!segmentInfo) {\n      return;\n    }\n\n    if (this.syncController_.timestampOffsetForTimeline(segmentInfo.timeline) === null) {\n      // We don't have the timestamp offset that we need to sync subtitles.\n      // Rerun on a timestamp offset or user interaction.\n      var checkTimestampOffset = function checkTimestampOffset() {\n        _this2.state = 'READY';\n\n        if (!_this2.paused()) {\n          // if not paused, queue a buffer check as soon as possible\n          _this2.monitorBuffer_();\n        }\n      };\n\n      this.syncController_.one('timestampoffset', checkTimestampOffset);\n      this.state = 'WAITING_ON_TIMELINE';\n      return;\n    }\n\n    this.loadSegment_(segmentInfo);\n  } // never set a timestamp offset for vtt segments.\n  ;\n\n  _proto.timestampOffsetForSegment_ = function timestampOffsetForSegment_() {\n    return null;\n  };\n\n  _proto.chooseNextRequest_ = function chooseNextRequest_() {\n    return this.skipEmptySegments_(_SegmentLoader.prototype.chooseNextRequest_.call(this));\n  }\n  /**\n   * Prevents the segment loader from requesting segments we know contain no subtitles\n   * by walking forward until we find the next segment that we don't know whether it is\n   * empty or not.\n   *\n   * @param {Object} segmentInfo\n   *        a segment info object that describes the current segment\n   * @return {Object}\n   *         a segment info object that describes the current segment\n   */\n  ;\n\n  _proto.skipEmptySegments_ = function skipEmptySegments_(segmentInfo) {\n    while (segmentInfo && segmentInfo.segment.empty) {\n      // stop at the last possible segmentInfo\n      if (segmentInfo.mediaIndex + 1 >= segmentInfo.playlist.segments.length) {\n        segmentInfo = null;\n        break;\n      }\n\n      segmentInfo = this.generateSegmentInfo_({\n        playlist: segmentInfo.playlist,\n        mediaIndex: segmentInfo.mediaIndex + 1,\n        startOfSegment: segmentInfo.startOfSegment + segmentInfo.duration,\n        isSyncRequest: segmentInfo.isSyncRequest\n      });\n    }\n\n    return segmentInfo;\n  };\n\n  _proto.stopForError = function stopForError(error) {\n    this.error(error);\n    this.state = 'READY';\n    this.pause();\n    this.trigger('error');\n  }\n  /**\n   * append a decrypted segement to the SourceBuffer through a SourceUpdater\n   *\n   * @private\n   */\n  ;\n\n  _proto.segmentRequestFinished_ = function segmentRequestFinished_(error, simpleSegment, result) {\n    var _this3 = this;\n\n    if (!this.subtitlesTrack_) {\n      this.state = 'READY';\n      return;\n    }\n\n    this.saveTransferStats_(simpleSegment.stats); // the request was aborted\n\n    if (!this.pendingSegment_) {\n      this.state = 'READY';\n      this.mediaRequestsAborted += 1;\n      return;\n    }\n\n    if (error) {\n      if (error.code === REQUEST_ERRORS.TIMEOUT) {\n        this.handleTimeout_();\n      }\n\n      if (error.code === REQUEST_ERRORS.ABORTED) {\n        this.mediaRequestsAborted += 1;\n      } else {\n        this.mediaRequestsErrored += 1;\n      }\n\n      this.stopForError(error);\n      return;\n    }\n\n    var segmentInfo = this.pendingSegment_; // although the VTT segment loader bandwidth isn't really used, it's good to\n    // maintain functionality between segment loaders\n\n    this.saveBandwidthRelatedStats_(segmentInfo.duration, simpleSegment.stats);\n    this.state = 'APPENDING'; // used for tests\n\n    this.trigger('appending');\n    var segment = segmentInfo.segment;\n\n    if (segment.map) {\n      segment.map.bytes = simpleSegment.map.bytes;\n    }\n\n    segmentInfo.bytes = simpleSegment.bytes; // Make sure that vttjs has loaded, otherwise, wait till it finished loading\n\n    if (typeof window$1.WebVTT !== 'function' && this.subtitlesTrack_ && this.subtitlesTrack_.tech_) {\n      var loadHandler;\n\n      var errorHandler = function errorHandler() {\n        _this3.subtitlesTrack_.tech_.off('vttjsloaded', loadHandler);\n\n        _this3.stopForError({\n          message: 'Error loading vtt.js'\n        });\n\n        return;\n      };\n\n      loadHandler = function loadHandler() {\n        _this3.subtitlesTrack_.tech_.off('vttjserror', errorHandler);\n\n        _this3.segmentRequestFinished_(error, simpleSegment, result);\n      };\n\n      this.state = 'WAITING_ON_VTTJS';\n      this.subtitlesTrack_.tech_.one('vttjsloaded', loadHandler);\n      this.subtitlesTrack_.tech_.one('vttjserror', errorHandler);\n      return;\n    }\n\n    segment.requested = true;\n\n    try {\n      this.parseVTTCues_(segmentInfo);\n    } catch (e) {\n      this.stopForError({\n        message: e.message\n      });\n      return;\n    }\n\n    this.updateTimeMapping_(segmentInfo, this.syncController_.timelines[segmentInfo.timeline], this.playlist_);\n\n    if (segmentInfo.cues.length) {\n      segmentInfo.timingInfo = {\n        start: segmentInfo.cues[0].startTime,\n        end: segmentInfo.cues[segmentInfo.cues.length - 1].endTime\n      };\n    } else {\n      segmentInfo.timingInfo = {\n        start: segmentInfo.startOfSegment,\n        end: segmentInfo.startOfSegment + segmentInfo.duration\n      };\n    }\n\n    if (segmentInfo.isSyncRequest) {\n      this.trigger('syncinfoupdate');\n      this.pendingSegment_ = null;\n      this.state = 'READY';\n      return;\n    }\n\n    segmentInfo.byteLength = segmentInfo.bytes.byteLength;\n    this.mediaSecondsLoaded += segment.duration; // Create VTTCue instances for each cue in the new segment and add them to\n    // the subtitle track\n\n    segmentInfo.cues.forEach(function (cue) {\n      _this3.subtitlesTrack_.addCue(_this3.featuresNativeTextTracks_ ? new window$1.VTTCue(cue.startTime, cue.endTime, cue.text) : cue);\n    }); // Remove any duplicate cues from the subtitle track. The WebVTT spec allows\n    // cues to have identical time-intervals, but if the text is also identical\n    // we can safely assume it is a duplicate that can be removed (ex. when a cue\n    // \"overlaps\" VTT segments)\n\n    removeDuplicateCuesFromTrack(this.subtitlesTrack_);\n    this.handleAppendsDone_();\n  };\n\n  _proto.handleData_ = function handleData_() {// noop as we shouldn't be getting video/audio data captions\n    // that we do not support here.\n  };\n\n  _proto.updateTimingInfoEnd_ = function updateTimingInfoEnd_() {// noop\n  }\n  /**\n   * Uses the WebVTT parser to parse the segment response\n   *\n   * @param {Object} segmentInfo\n   *        a segment info object that describes the current segment\n   * @private\n   */\n  ;\n\n  _proto.parseVTTCues_ = function parseVTTCues_(segmentInfo) {\n    var decoder;\n    var decodeBytesToString = false;\n\n    if (typeof window$1.TextDecoder === 'function') {\n      decoder = new window$1.TextDecoder('utf8');\n    } else {\n      decoder = window$1.WebVTT.StringDecoder();\n      decodeBytesToString = true;\n    }\n\n    var parser = new window$1.WebVTT.Parser(window$1, window$1.vttjs, decoder);\n    segmentInfo.cues = [];\n    segmentInfo.timestampmap = {\n      MPEGTS: 0,\n      LOCAL: 0\n    };\n    parser.oncue = segmentInfo.cues.push.bind(segmentInfo.cues);\n\n    parser.ontimestampmap = function (map) {\n      segmentInfo.timestampmap = map;\n    };\n\n    parser.onparsingerror = function (error) {\n      videojs.log.warn('Error encountered when parsing cues: ' + error.message);\n    };\n\n    if (segmentInfo.segment.map) {\n      var mapData = segmentInfo.segment.map.bytes;\n\n      if (decodeBytesToString) {\n        mapData = uint8ToUtf8(mapData);\n      }\n\n      parser.parse(mapData);\n    }\n\n    var segmentData = segmentInfo.bytes;\n\n    if (decodeBytesToString) {\n      segmentData = uint8ToUtf8(segmentData);\n    }\n\n    parser.parse(segmentData);\n    parser.flush();\n  }\n  /**\n   * Updates the start and end times of any cues parsed by the WebVTT parser using\n   * the information parsed from the X-TIMESTAMP-MAP header and a TS to media time mapping\n   * from the SyncController\n   *\n   * @param {Object} segmentInfo\n   *        a segment info object that describes the current segment\n   * @param {Object} mappingObj\n   *        object containing a mapping from TS to media time\n   * @param {Object} playlist\n   *        the playlist object containing the segment\n   * @private\n   */\n  ;\n\n  _proto.updateTimeMapping_ = function updateTimeMapping_(segmentInfo, mappingObj, playlist) {\n    var segment = segmentInfo.segment;\n\n    if (!mappingObj) {\n      // If the sync controller does not have a mapping of TS to Media Time for the\n      // timeline, then we don't have enough information to update the cue\n      // start/end times\n      return;\n    }\n\n    if (!segmentInfo.cues.length) {\n      // If there are no cues, we also do not have enough information to figure out\n      // segment timing. Mark that the segment contains no cues so we don't re-request\n      // an empty segment.\n      segment.empty = true;\n      return;\n    }\n\n    var timestampmap = segmentInfo.timestampmap;\n    var diff = timestampmap.MPEGTS / ONE_SECOND_IN_TS - timestampmap.LOCAL + mappingObj.mapping;\n    segmentInfo.cues.forEach(function (cue) {\n      // First convert cue time to TS time using the timestamp-map provided within the vtt\n      cue.startTime += diff;\n      cue.endTime += diff;\n    });\n\n    if (!playlist.syncInfo) {\n      var firstStart = segmentInfo.cues[0].startTime;\n      var lastStart = segmentInfo.cues[segmentInfo.cues.length - 1].startTime;\n      playlist.syncInfo = {\n        mediaSequence: playlist.mediaSequence + segmentInfo.mediaIndex,\n        time: Math.min(firstStart, lastStart - segment.duration)\n      };\n    }\n  };\n\n  return VTTSegmentLoader;\n}(SegmentLoader);\n/**\n * @file ad-cue-tags.js\n */\n\n/**\n * Searches for an ad cue that overlaps with the given mediaTime\n *\n * @param {Object} track\n *        the track to find the cue for\n *\n * @param {number} mediaTime\n *        the time to find the cue at\n *\n * @return {Object|null}\n *         the found cue or null\n */\n\n\nvar findAdCue = function findAdCue(track, mediaTime) {\n  var cues = track.cues;\n\n  for (var i = 0; i < cues.length; i++) {\n    var cue = cues[i];\n\n    if (mediaTime >= cue.adStartTime && mediaTime <= cue.adEndTime) {\n      return cue;\n    }\n  }\n\n  return null;\n};\n\nvar updateAdCues = function updateAdCues(media, track, offset) {\n  if (offset === void 0) {\n    offset = 0;\n  }\n\n  if (!media.segments) {\n    return;\n  }\n\n  var mediaTime = offset;\n  var cue;\n\n  for (var i = 0; i < media.segments.length; i++) {\n    var segment = media.segments[i];\n\n    if (!cue) {\n      // Since the cues will span for at least the segment duration, adding a fudge\n      // factor of half segment duration will prevent duplicate cues from being\n      // created when timing info is not exact (e.g. cue start time initialized\n      // at 10.006677, but next call mediaTime is 10.003332 )\n      cue = findAdCue(track, mediaTime + segment.duration / 2);\n    }\n\n    if (cue) {\n      if ('cueIn' in segment) {\n        // Found a CUE-IN so end the cue\n        cue.endTime = mediaTime;\n        cue.adEndTime = mediaTime;\n        mediaTime += segment.duration;\n        cue = null;\n        continue;\n      }\n\n      if (mediaTime < cue.endTime) {\n        // Already processed this mediaTime for this cue\n        mediaTime += segment.duration;\n        continue;\n      } // otherwise extend cue until a CUE-IN is found\n\n\n      cue.endTime += segment.duration;\n    } else {\n      if ('cueOut' in segment) {\n        cue = new window$1.VTTCue(mediaTime, mediaTime + segment.duration, segment.cueOut);\n        cue.adStartTime = mediaTime; // Assumes tag format to be\n        // #EXT-X-CUE-OUT:30\n\n        cue.adEndTime = mediaTime + parseFloat(segment.cueOut);\n        track.addCue(cue);\n      }\n\n      if ('cueOutCont' in segment) {\n        // Entered into the middle of an ad cue\n        // Assumes tag formate to be\n        // #EXT-X-CUE-OUT-CONT:10/30\n        var _segment$cueOutCont$s = segment.cueOutCont.split('/').map(parseFloat),\n            adOffset = _segment$cueOutCont$s[0],\n            adTotal = _segment$cueOutCont$s[1];\n\n        cue = new window$1.VTTCue(mediaTime, mediaTime + segment.duration, '');\n        cue.adStartTime = mediaTime - adOffset;\n        cue.adEndTime = cue.adStartTime + adTotal;\n        track.addCue(cue);\n      }\n    }\n\n    mediaTime += segment.duration;\n  }\n}; // synchronize expired playlist segments.\n// the max media sequence diff is 48 hours of live stream\n// content with two second segments. Anything larger than that\n// will likely be invalid.\n\n\nvar MAX_MEDIA_SEQUENCE_DIFF_FOR_SYNC = 86400;\nvar syncPointStrategies = [// Stategy \"VOD\": Handle the VOD-case where the sync-point is *always*\n//                the equivalence display-time 0 === segment-index 0\n{\n  name: 'VOD',\n  run: function run(syncController, playlist, duration, currentTimeline, currentTime) {\n    if (duration !== Infinity) {\n      var syncPoint = {\n        time: 0,\n        segmentIndex: 0,\n        partIndex: null\n      };\n      return syncPoint;\n    }\n\n    return null;\n  }\n}, // Stategy \"ProgramDateTime\": We have a program-date-time tag in this playlist\n{\n  name: 'ProgramDateTime',\n  run: function run(syncController, playlist, duration, currentTimeline, currentTime) {\n    if (!Object.keys(syncController.timelineToDatetimeMappings).length) {\n      return null;\n    }\n\n    var syncPoint = null;\n    var lastDistance = null;\n    var partsAndSegments = getPartsAndSegments(playlist);\n    currentTime = currentTime || 0;\n\n    for (var i = 0; i < partsAndSegments.length; i++) {\n      // start from the end and loop backwards for live\n      // or start from the front and loop forwards for non-live\n      var index = playlist.endList || currentTime === 0 ? i : partsAndSegments.length - (i + 1);\n      var partAndSegment = partsAndSegments[index];\n      var segment = partAndSegment.segment;\n      var datetimeMapping = syncController.timelineToDatetimeMappings[segment.timeline];\n\n      if (!datetimeMapping || !segment.dateTimeObject) {\n        continue;\n      }\n\n      var segmentTime = segment.dateTimeObject.getTime() / 1000;\n      var start = segmentTime + datetimeMapping; // take part duration into account.\n\n      if (segment.parts && typeof partAndSegment.partIndex === 'number') {\n        for (var z = 0; z < partAndSegment.partIndex; z++) {\n          start += segment.parts[z].duration;\n        }\n      }\n\n      var distance = Math.abs(currentTime - start); // Once the distance begins to increase, or if distance is 0, we have passed\n      // currentTime and can stop looking for better candidates\n\n      if (lastDistance !== null && (distance === 0 || lastDistance < distance)) {\n        break;\n      }\n\n      lastDistance = distance;\n      syncPoint = {\n        time: start,\n        segmentIndex: partAndSegment.segmentIndex,\n        partIndex: partAndSegment.partIndex\n      };\n    }\n\n    return syncPoint;\n  }\n}, // Stategy \"Segment\": We have a known time mapping for a timeline and a\n//                    segment in the current timeline with timing data\n{\n  name: 'Segment',\n  run: function run(syncController, playlist, duration, currentTimeline, currentTime) {\n    var syncPoint = null;\n    var lastDistance = null;\n    currentTime = currentTime || 0;\n    var partsAndSegments = getPartsAndSegments(playlist);\n\n    for (var i = 0; i < partsAndSegments.length; i++) {\n      // start from the end and loop backwards for live\n      // or start from the front and loop forwards for non-live\n      var index = playlist.endList || currentTime === 0 ? i : partsAndSegments.length - (i + 1);\n      var partAndSegment = partsAndSegments[index];\n      var segment = partAndSegment.segment;\n      var start = partAndSegment.part && partAndSegment.part.start || segment && segment.start;\n\n      if (segment.timeline === currentTimeline && typeof start !== 'undefined') {\n        var distance = Math.abs(currentTime - start); // Once the distance begins to increase, we have passed\n        // currentTime and can stop looking for better candidates\n\n        if (lastDistance !== null && lastDistance < distance) {\n          break;\n        }\n\n        if (!syncPoint || lastDistance === null || lastDistance >= distance) {\n          lastDistance = distance;\n          syncPoint = {\n            time: start,\n            segmentIndex: partAndSegment.segmentIndex,\n            partIndex: partAndSegment.partIndex\n          };\n        }\n      }\n    }\n\n    return syncPoint;\n  }\n}, // Stategy \"Discontinuity\": We have a discontinuity with a known\n//                          display-time\n{\n  name: 'Discontinuity',\n  run: function run(syncController, playlist, duration, currentTimeline, currentTime) {\n    var syncPoint = null;\n    currentTime = currentTime || 0;\n\n    if (playlist.discontinuityStarts && playlist.discontinuityStarts.length) {\n      var lastDistance = null;\n\n      for (var i = 0; i < playlist.discontinuityStarts.length; i++) {\n        var segmentIndex = playlist.discontinuityStarts[i];\n        var discontinuity = playlist.discontinuitySequence + i + 1;\n        var discontinuitySync = syncController.discontinuities[discontinuity];\n\n        if (discontinuitySync) {\n          var distance = Math.abs(currentTime - discontinuitySync.time); // Once the distance begins to increase, we have passed\n          // currentTime and can stop looking for better candidates\n\n          if (lastDistance !== null && lastDistance < distance) {\n            break;\n          }\n\n          if (!syncPoint || lastDistance === null || lastDistance >= distance) {\n            lastDistance = distance;\n            syncPoint = {\n              time: discontinuitySync.time,\n              segmentIndex: segmentIndex,\n              partIndex: null\n            };\n          }\n        }\n      }\n    }\n\n    return syncPoint;\n  }\n}, // Stategy \"Playlist\": We have a playlist with a known mapping of\n//                     segment index to display time\n{\n  name: 'Playlist',\n  run: function run(syncController, playlist, duration, currentTimeline, currentTime) {\n    if (playlist.syncInfo) {\n      var syncPoint = {\n        time: playlist.syncInfo.time,\n        segmentIndex: playlist.syncInfo.mediaSequence - playlist.mediaSequence,\n        partIndex: null\n      };\n      return syncPoint;\n    }\n\n    return null;\n  }\n}];\n\nvar SyncController = /*#__PURE__*/function (_videojs$EventTarget) {\n  _inheritsLoose(SyncController, _videojs$EventTarget);\n\n  function SyncController(options) {\n    var _this;\n\n    _this = _videojs$EventTarget.call(this) || this; // ...for synching across variants\n\n    _this.timelines = [];\n    _this.discontinuities = [];\n    _this.timelineToDatetimeMappings = {};\n    _this.logger_ = logger('SyncController');\n    return _this;\n  }\n  /**\n   * Find a sync-point for the playlist specified\n   *\n   * A sync-point is defined as a known mapping from display-time to\n   * a segment-index in the current playlist.\n   *\n   * @param {Playlist} playlist\n   *        The playlist that needs a sync-point\n   * @param {number} duration\n   *        Duration of the MediaSource (Infinite if playing a live source)\n   * @param {number} currentTimeline\n   *        The last timeline from which a segment was loaded\n   * @return {Object}\n   *          A sync-point object\n   */\n\n\n  var _proto = SyncController.prototype;\n\n  _proto.getSyncPoint = function getSyncPoint(playlist, duration, currentTimeline, currentTime) {\n    var syncPoints = this.runStrategies_(playlist, duration, currentTimeline, currentTime);\n\n    if (!syncPoints.length) {\n      // Signal that we need to attempt to get a sync-point manually\n      // by fetching a segment in the playlist and constructing\n      // a sync-point from that information\n      return null;\n    } // Now find the sync-point that is closest to the currentTime because\n    // that should result in the most accurate guess about which segment\n    // to fetch\n\n\n    return this.selectSyncPoint_(syncPoints, {\n      key: 'time',\n      value: currentTime\n    });\n  }\n  /**\n   * Calculate the amount of time that has expired off the playlist during playback\n   *\n   * @param {Playlist} playlist\n   *        Playlist object to calculate expired from\n   * @param {number} duration\n   *        Duration of the MediaSource (Infinity if playling a live source)\n   * @return {number|null}\n   *          The amount of time that has expired off the playlist during playback. Null\n   *          if no sync-points for the playlist can be found.\n   */\n  ;\n\n  _proto.getExpiredTime = function getExpiredTime(playlist, duration) {\n    if (!playlist || !playlist.segments) {\n      return null;\n    }\n\n    var syncPoints = this.runStrategies_(playlist, duration, playlist.discontinuitySequence, 0); // Without sync-points, there is not enough information to determine the expired time\n\n    if (!syncPoints.length) {\n      return null;\n    }\n\n    var syncPoint = this.selectSyncPoint_(syncPoints, {\n      key: 'segmentIndex',\n      value: 0\n    }); // If the sync-point is beyond the start of the playlist, we want to subtract the\n    // duration from index 0 to syncPoint.segmentIndex instead of adding.\n\n    if (syncPoint.segmentIndex > 0) {\n      syncPoint.time *= -1;\n    }\n\n    return Math.abs(syncPoint.time + sumDurations({\n      defaultDuration: playlist.targetDuration,\n      durationList: playlist.segments,\n      startIndex: syncPoint.segmentIndex,\n      endIndex: 0\n    }));\n  }\n  /**\n   * Runs each sync-point strategy and returns a list of sync-points returned by the\n   * strategies\n   *\n   * @private\n   * @param {Playlist} playlist\n   *        The playlist that needs a sync-point\n   * @param {number} duration\n   *        Duration of the MediaSource (Infinity if playing a live source)\n   * @param {number} currentTimeline\n   *        The last timeline from which a segment was loaded\n   * @return {Array}\n   *          A list of sync-point objects\n   */\n  ;\n\n  _proto.runStrategies_ = function runStrategies_(playlist, duration, currentTimeline, currentTime) {\n    var syncPoints = []; // Try to find a sync-point in by utilizing various strategies...\n\n    for (var i = 0; i < syncPointStrategies.length; i++) {\n      var strategy = syncPointStrategies[i];\n      var syncPoint = strategy.run(this, playlist, duration, currentTimeline, currentTime);\n\n      if (syncPoint) {\n        syncPoint.strategy = strategy.name;\n        syncPoints.push({\n          strategy: strategy.name,\n          syncPoint: syncPoint\n        });\n      }\n    }\n\n    return syncPoints;\n  }\n  /**\n   * Selects the sync-point nearest the specified target\n   *\n   * @private\n   * @param {Array} syncPoints\n   *        List of sync-points to select from\n   * @param {Object} target\n   *        Object specifying the property and value we are targeting\n   * @param {string} target.key\n   *        Specifies the property to target. Must be either 'time' or 'segmentIndex'\n   * @param {number} target.value\n   *        The value to target for the specified key.\n   * @return {Object}\n   *          The sync-point nearest the target\n   */\n  ;\n\n  _proto.selectSyncPoint_ = function selectSyncPoint_(syncPoints, target) {\n    var bestSyncPoint = syncPoints[0].syncPoint;\n    var bestDistance = Math.abs(syncPoints[0].syncPoint[target.key] - target.value);\n    var bestStrategy = syncPoints[0].strategy;\n\n    for (var i = 1; i < syncPoints.length; i++) {\n      var newDistance = Math.abs(syncPoints[i].syncPoint[target.key] - target.value);\n\n      if (newDistance < bestDistance) {\n        bestDistance = newDistance;\n        bestSyncPoint = syncPoints[i].syncPoint;\n        bestStrategy = syncPoints[i].strategy;\n      }\n    }\n\n    this.logger_(\"syncPoint for [\" + target.key + \": \" + target.value + \"] chosen with strategy\" + (\" [\" + bestStrategy + \"]: [time:\" + bestSyncPoint.time + \",\") + (\" segmentIndex:\" + bestSyncPoint.segmentIndex) + (typeof bestSyncPoint.partIndex === 'number' ? \",partIndex:\" + bestSyncPoint.partIndex : '') + ']');\n    return bestSyncPoint;\n  }\n  /**\n   * Save any meta-data present on the segments when segments leave\n   * the live window to the playlist to allow for synchronization at the\n   * playlist level later.\n   *\n   * @param {Playlist} oldPlaylist - The previous active playlist\n   * @param {Playlist} newPlaylist - The updated and most current playlist\n   */\n  ;\n\n  _proto.saveExpiredSegmentInfo = function saveExpiredSegmentInfo(oldPlaylist, newPlaylist) {\n    var mediaSequenceDiff = newPlaylist.mediaSequence - oldPlaylist.mediaSequence; // Ignore large media sequence gaps\n\n    if (mediaSequenceDiff > MAX_MEDIA_SEQUENCE_DIFF_FOR_SYNC) {\n      videojs.log.warn(\"Not saving expired segment info. Media sequence gap \" + mediaSequenceDiff + \" is too large.\");\n      return;\n    } // When a segment expires from the playlist and it has a start time\n    // save that information as a possible sync-point reference in future\n\n\n    for (var i = mediaSequenceDiff - 1; i >= 0; i--) {\n      var lastRemovedSegment = oldPlaylist.segments[i];\n\n      if (lastRemovedSegment && typeof lastRemovedSegment.start !== 'undefined') {\n        newPlaylist.syncInfo = {\n          mediaSequence: oldPlaylist.mediaSequence + i,\n          time: lastRemovedSegment.start\n        };\n        this.logger_(\"playlist refresh sync: [time:\" + newPlaylist.syncInfo.time + \",\" + (\" mediaSequence: \" + newPlaylist.syncInfo.mediaSequence + \"]\"));\n        this.trigger('syncinfoupdate');\n        break;\n      }\n    }\n  }\n  /**\n   * Save the mapping from playlist's ProgramDateTime to display. This should only happen\n   * before segments start to load.\n   *\n   * @param {Playlist} playlist - The currently active playlist\n   */\n  ;\n\n  _proto.setDateTimeMappingForStart = function setDateTimeMappingForStart(playlist) {\n    // It's possible for the playlist to be updated before playback starts, meaning time\n    // zero is not yet set. If, during these playlist refreshes, a discontinuity is\n    // crossed, then the old time zero mapping (for the prior timeline) would be retained\n    // unless the mappings are cleared.\n    this.timelineToDatetimeMappings = {};\n\n    if (playlist.segments && playlist.segments.length && playlist.segments[0].dateTimeObject) {\n      var firstSegment = playlist.segments[0];\n      var playlistTimestamp = firstSegment.dateTimeObject.getTime() / 1000;\n      this.timelineToDatetimeMappings[firstSegment.timeline] = -playlistTimestamp;\n    }\n  }\n  /**\n   * Calculates and saves timeline mappings, playlist sync info, and segment timing values\n   * based on the latest timing information.\n   *\n   * @param {Object} options\n   *        Options object\n   * @param {SegmentInfo} options.segmentInfo\n   *        The current active request information\n   * @param {boolean} options.shouldSaveTimelineMapping\n   *        If there's a timeline change, determines if the timeline mapping should be\n   *        saved for timeline mapping and program date time mappings.\n   */\n  ;\n\n  _proto.saveSegmentTimingInfo = function saveSegmentTimingInfo(_ref) {\n    var segmentInfo = _ref.segmentInfo,\n        shouldSaveTimelineMapping = _ref.shouldSaveTimelineMapping;\n    var didCalculateSegmentTimeMapping = this.calculateSegmentTimeMapping_(segmentInfo, segmentInfo.timingInfo, shouldSaveTimelineMapping);\n    var segment = segmentInfo.segment;\n\n    if (didCalculateSegmentTimeMapping) {\n      this.saveDiscontinuitySyncInfo_(segmentInfo); // If the playlist does not have sync information yet, record that information\n      // now with segment timing information\n\n      if (!segmentInfo.playlist.syncInfo) {\n        segmentInfo.playlist.syncInfo = {\n          mediaSequence: segmentInfo.playlist.mediaSequence + segmentInfo.mediaIndex,\n          time: segment.start\n        };\n      }\n    }\n\n    var dateTime = segment.dateTimeObject;\n\n    if (segment.discontinuity && shouldSaveTimelineMapping && dateTime) {\n      this.timelineToDatetimeMappings[segment.timeline] = -(dateTime.getTime() / 1000);\n    }\n  };\n\n  _proto.timestampOffsetForTimeline = function timestampOffsetForTimeline(timeline) {\n    if (typeof this.timelines[timeline] === 'undefined') {\n      return null;\n    }\n\n    return this.timelines[timeline].time;\n  };\n\n  _proto.mappingForTimeline = function mappingForTimeline(timeline) {\n    if (typeof this.timelines[timeline] === 'undefined') {\n      return null;\n    }\n\n    return this.timelines[timeline].mapping;\n  }\n  /**\n   * Use the \"media time\" for a segment to generate a mapping to \"display time\" and\n   * save that display time to the segment.\n   *\n   * @private\n   * @param {SegmentInfo} segmentInfo\n   *        The current active request information\n   * @param {Object} timingInfo\n   *        The start and end time of the current segment in \"media time\"\n   * @param {boolean} shouldSaveTimelineMapping\n   *        If there's a timeline change, determines if the timeline mapping should be\n   *        saved in timelines.\n   * @return {boolean}\n   *          Returns false if segment time mapping could not be calculated\n   */\n  ;\n\n  _proto.calculateSegmentTimeMapping_ = function calculateSegmentTimeMapping_(segmentInfo, timingInfo, shouldSaveTimelineMapping) {\n    // TODO: remove side effects\n    var segment = segmentInfo.segment;\n    var part = segmentInfo.part;\n    var mappingObj = this.timelines[segmentInfo.timeline];\n    var start;\n    var end;\n\n    if (typeof segmentInfo.timestampOffset === 'number') {\n      mappingObj = {\n        time: segmentInfo.startOfSegment,\n        mapping: segmentInfo.startOfSegment - timingInfo.start\n      };\n\n      if (shouldSaveTimelineMapping) {\n        this.timelines[segmentInfo.timeline] = mappingObj;\n        this.trigger('timestampoffset');\n        this.logger_(\"time mapping for timeline \" + segmentInfo.timeline + \": \" + (\"[time: \" + mappingObj.time + \"] [mapping: \" + mappingObj.mapping + \"]\"));\n      }\n\n      start = segmentInfo.startOfSegment;\n      end = timingInfo.end + mappingObj.mapping;\n    } else if (mappingObj) {\n      start = timingInfo.start + mappingObj.mapping;\n      end = timingInfo.end + mappingObj.mapping;\n    } else {\n      return false;\n    }\n\n    if (part) {\n      part.start = start;\n      part.end = end;\n    } // If we don't have a segment start yet or the start value we got\n    // is less than our current segment.start value, save a new start value.\n    // We have to do this because parts will have segment timing info saved\n    // multiple times and we want segment start to be the earliest part start\n    // value for that segment.\n\n\n    if (!segment.start || start < segment.start) {\n      segment.start = start;\n    }\n\n    segment.end = end;\n    return true;\n  }\n  /**\n   * Each time we have discontinuity in the playlist, attempt to calculate the location\n   * in display of the start of the discontinuity and save that. We also save an accuracy\n   * value so that we save values with the most accuracy (closest to 0.)\n   *\n   * @private\n   * @param {SegmentInfo} segmentInfo - The current active request information\n   */\n  ;\n\n  _proto.saveDiscontinuitySyncInfo_ = function saveDiscontinuitySyncInfo_(segmentInfo) {\n    var playlist = segmentInfo.playlist;\n    var segment = segmentInfo.segment; // If the current segment is a discontinuity then we know exactly where\n    // the start of the range and it's accuracy is 0 (greater accuracy values\n    // mean more approximation)\n\n    if (segment.discontinuity) {\n      this.discontinuities[segment.timeline] = {\n        time: segment.start,\n        accuracy: 0\n      };\n    } else if (playlist.discontinuityStarts && playlist.discontinuityStarts.length) {\n      // Search for future discontinuities that we can provide better timing\n      // information for and save that information for sync purposes\n      for (var i = 0; i < playlist.discontinuityStarts.length; i++) {\n        var segmentIndex = playlist.discontinuityStarts[i];\n        var discontinuity = playlist.discontinuitySequence + i + 1;\n        var mediaIndexDiff = segmentIndex - segmentInfo.mediaIndex;\n        var accuracy = Math.abs(mediaIndexDiff);\n\n        if (!this.discontinuities[discontinuity] || this.discontinuities[discontinuity].accuracy > accuracy) {\n          var time = void 0;\n\n          if (mediaIndexDiff < 0) {\n            time = segment.start - sumDurations({\n              defaultDuration: playlist.targetDuration,\n              durationList: playlist.segments,\n              startIndex: segmentInfo.mediaIndex,\n              endIndex: segmentIndex\n            });\n          } else {\n            time = segment.end + sumDurations({\n              defaultDuration: playlist.targetDuration,\n              durationList: playlist.segments,\n              startIndex: segmentInfo.mediaIndex + 1,\n              endIndex: segmentIndex\n            });\n          }\n\n          this.discontinuities[discontinuity] = {\n            time: time,\n            accuracy: accuracy\n          };\n        }\n      }\n    }\n  };\n\n  _proto.dispose = function dispose() {\n    this.trigger('dispose');\n    this.off();\n  };\n\n  return SyncController;\n}(videojs.EventTarget);\n/**\n * The TimelineChangeController acts as a source for segment loaders to listen for and\n * keep track of latest and pending timeline changes. This is useful to ensure proper\n * sync, as each loader may need to make a consideration for what timeline the other\n * loader is on before making changes which could impact the other loader's media.\n *\n * @class TimelineChangeController\n * @extends videojs.EventTarget\n */\n\n\nvar TimelineChangeController = /*#__PURE__*/function (_videojs$EventTarget) {\n  _inheritsLoose(TimelineChangeController, _videojs$EventTarget);\n\n  function TimelineChangeController() {\n    var _this;\n\n    _this = _videojs$EventTarget.call(this) || this;\n    _this.pendingTimelineChanges_ = {};\n    _this.lastTimelineChanges_ = {};\n    return _this;\n  }\n\n  var _proto = TimelineChangeController.prototype;\n\n  _proto.clearPendingTimelineChange = function clearPendingTimelineChange(type) {\n    this.pendingTimelineChanges_[type] = null;\n    this.trigger('pendingtimelinechange');\n  };\n\n  _proto.pendingTimelineChange = function pendingTimelineChange(_ref) {\n    var type = _ref.type,\n        from = _ref.from,\n        to = _ref.to;\n\n    if (typeof from === 'number' && typeof to === 'number') {\n      this.pendingTimelineChanges_[type] = {\n        type: type,\n        from: from,\n        to: to\n      };\n      this.trigger('pendingtimelinechange');\n    }\n\n    return this.pendingTimelineChanges_[type];\n  };\n\n  _proto.lastTimelineChange = function lastTimelineChange(_ref2) {\n    var type = _ref2.type,\n        from = _ref2.from,\n        to = _ref2.to;\n\n    if (typeof from === 'number' && typeof to === 'number') {\n      this.lastTimelineChanges_[type] = {\n        type: type,\n        from: from,\n        to: to\n      };\n      delete this.pendingTimelineChanges_[type];\n      this.trigger('timelinechange');\n    }\n\n    return this.lastTimelineChanges_[type];\n  };\n\n  _proto.dispose = function dispose() {\n    this.trigger('dispose');\n    this.pendingTimelineChanges_ = {};\n    this.lastTimelineChanges_ = {};\n    this.off();\n  };\n\n  return TimelineChangeController;\n}(videojs.EventTarget);\n/* rollup-plugin-worker-factory start for worker!/Users/gsinger/repos/clean/http-streaming/src/decrypter-worker.js */\n\n\nvar workerCode = transform(getWorkerString(function () {\n  function createCommonjsModule(fn, basedir, module) {\n    return module = {\n      path: basedir,\n      exports: {},\n      require: function require(path, base) {\n        return commonjsRequire(path, base === undefined || base === null ? module.path : base);\n      }\n    }, fn(module, module.exports), module.exports;\n  }\n\n  function commonjsRequire() {\n    throw new Error('Dynamic requires are not currently supported by @rollup/plugin-commonjs');\n  }\n\n  var createClass = createCommonjsModule(function (module) {\n    function _defineProperties(target, props) {\n      for (var i = 0; i < props.length; i++) {\n        var descriptor = props[i];\n        descriptor.enumerable = descriptor.enumerable || false;\n        descriptor.configurable = true;\n        if (\"value\" in descriptor) descriptor.writable = true;\n        Object.defineProperty(target, descriptor.key, descriptor);\n      }\n    }\n\n    function _createClass(Constructor, protoProps, staticProps) {\n      if (protoProps) _defineProperties(Constructor.prototype, protoProps);\n      if (staticProps) _defineProperties(Constructor, staticProps);\n      return Constructor;\n    }\n\n    module.exports = _createClass;\n    module.exports[\"default\"] = module.exports, module.exports.__esModule = true;\n  });\n  var setPrototypeOf = createCommonjsModule(function (module) {\n    function _setPrototypeOf(o, p) {\n      module.exports = _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {\n        o.__proto__ = p;\n        return o;\n      };\n\n      module.exports[\"default\"] = module.exports, module.exports.__esModule = true;\n      return _setPrototypeOf(o, p);\n    }\n\n    module.exports = _setPrototypeOf;\n    module.exports[\"default\"] = module.exports, module.exports.__esModule = true;\n  });\n  var inheritsLoose = createCommonjsModule(function (module) {\n    function _inheritsLoose(subClass, superClass) {\n      subClass.prototype = Object.create(superClass.prototype);\n      subClass.prototype.constructor = subClass;\n      setPrototypeOf(subClass, superClass);\n    }\n\n    module.exports = _inheritsLoose;\n    module.exports[\"default\"] = module.exports, module.exports.__esModule = true;\n  });\n  /**\n   * @file stream.js\n   */\n\n  /**\n   * A lightweight readable stream implemention that handles event dispatching.\n   *\n   * @class Stream\n   */\n\n  var Stream = /*#__PURE__*/function () {\n    function Stream() {\n      this.listeners = {};\n    }\n    /**\n     * Add a listener for a specified event type.\n     *\n     * @param {string} type the event name\n     * @param {Function} listener the callback to be invoked when an event of\n     * the specified type occurs\n     */\n\n\n    var _proto = Stream.prototype;\n\n    _proto.on = function on(type, listener) {\n      if (!this.listeners[type]) {\n        this.listeners[type] = [];\n      }\n\n      this.listeners[type].push(listener);\n    }\n    /**\n     * Remove a listener for a specified event type.\n     *\n     * @param {string} type the event name\n     * @param {Function} listener  a function previously registered for this\n     * type of event through `on`\n     * @return {boolean} if we could turn it off or not\n     */\n    ;\n\n    _proto.off = function off(type, listener) {\n      if (!this.listeners[type]) {\n        return false;\n      }\n\n      var index = this.listeners[type].indexOf(listener); // TODO: which is better?\n      // In Video.js we slice listener functions\n      // on trigger so that it does not mess up the order\n      // while we loop through.\n      //\n      // Here we slice on off so that the loop in trigger\n      // can continue using it's old reference to loop without\n      // messing up the order.\n\n      this.listeners[type] = this.listeners[type].slice(0);\n      this.listeners[type].splice(index, 1);\n      return index > -1;\n    }\n    /**\n     * Trigger an event of the specified type on this stream. Any additional\n     * arguments to this function are passed as parameters to event listeners.\n     *\n     * @param {string} type the event name\n     */\n    ;\n\n    _proto.trigger = function trigger(type) {\n      var callbacks = this.listeners[type];\n\n      if (!callbacks) {\n        return;\n      } // Slicing the arguments on every invocation of this method\n      // can add a significant amount of overhead. Avoid the\n      // intermediate object creation for the common case of a\n      // single callback argument\n\n\n      if (arguments.length === 2) {\n        var length = callbacks.length;\n\n        for (var i = 0; i < length; ++i) {\n          callbacks[i].call(this, arguments[1]);\n        }\n      } else {\n        var args = Array.prototype.slice.call(arguments, 1);\n        var _length = callbacks.length;\n\n        for (var _i = 0; _i < _length; ++_i) {\n          callbacks[_i].apply(this, args);\n        }\n      }\n    }\n    /**\n     * Destroys the stream and cleans up.\n     */\n    ;\n\n    _proto.dispose = function dispose() {\n      this.listeners = {};\n    }\n    /**\n     * Forwards all `data` events on this stream to the destination stream. The\n     * destination stream should provide a method `push` to receive the data\n     * events as they arrive.\n     *\n     * @param {Stream} destination the stream that will receive all `data` events\n     * @see http://nodejs.org/api/stream.html#stream_readable_pipe_destination_options\n     */\n    ;\n\n    _proto.pipe = function pipe(destination) {\n      this.on('data', function (data) {\n        destination.push(data);\n      });\n    };\n\n    return Stream;\n  }();\n  /*! @name pkcs7 @version 1.0.4 @license Apache-2.0 */\n\n  /**\n   * Returns the subarray of a Uint8Array without PKCS#7 padding.\n   *\n   * @param padded {Uint8Array} unencrypted bytes that have been padded\n   * @return {Uint8Array} the unpadded bytes\n   * @see http://tools.ietf.org/html/rfc5652\n   */\n\n\n  function unpad(padded) {\n    return padded.subarray(0, padded.byteLength - padded[padded.byteLength - 1]);\n  }\n  /*! @name aes-decrypter @version 3.1.2 @license Apache-2.0 */\n\n  /**\n   * @file aes.js\n   *\n   * This file contains an adaptation of the AES decryption algorithm\n   * from the Standford Javascript Cryptography Library. That work is\n   * covered by the following copyright and permissions notice:\n   *\n   * Copyright 2009-2010 Emily Stark, Mike Hamburg, Dan Boneh.\n   * All rights reserved.\n   *\n   * Redistribution and use in source and binary forms, with or without\n   * modification, are permitted provided that the following conditions are\n   * met:\n   *\n   * 1. Redistributions of source code must retain the above copyright\n   *    notice, this list of conditions and the following disclaimer.\n   *\n   * 2. Redistributions in binary form must reproduce the above\n   *    copyright notice, this list of conditions and the following\n   *    disclaimer in the documentation and/or other materials provided\n   *    with the distribution.\n   *\n   * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR\n   * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED\n   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE\n   * DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> OR CONTRIBUTORS BE\n   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR\n   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF\n   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR\n   * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,\n   * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE\n   * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN\n   * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n   *\n   * The views and conclusions contained in the software and documentation\n   * are those of the authors and should not be interpreted as representing\n   * official policies, either expressed or implied, of the authors.\n   */\n\n  /**\n   * Expand the S-box tables.\n   *\n   * @private\n   */\n\n\n  var precompute = function precompute() {\n    var tables = [[[], [], [], [], []], [[], [], [], [], []]];\n    var encTable = tables[0];\n    var decTable = tables[1];\n    var sbox = encTable[4];\n    var sboxInv = decTable[4];\n    var i;\n    var x;\n    var xInv;\n    var d = [];\n    var th = [];\n    var x2;\n    var x4;\n    var x8;\n    var s;\n    var tEnc;\n    var tDec; // Compute double and third tables\n\n    for (i = 0; i < 256; i++) {\n      th[(d[i] = i << 1 ^ (i >> 7) * 283) ^ i] = i;\n    }\n\n    for (x = xInv = 0; !sbox[x]; x ^= x2 || 1, xInv = th[xInv] || 1) {\n      // Compute sbox\n      s = xInv ^ xInv << 1 ^ xInv << 2 ^ xInv << 3 ^ xInv << 4;\n      s = s >> 8 ^ s & 255 ^ 99;\n      sbox[x] = s;\n      sboxInv[s] = x; // Compute MixColumns\n\n      x8 = d[x4 = d[x2 = d[x]]];\n      tDec = x8 * 0x1010101 ^ x4 * 0x10001 ^ x2 * 0x101 ^ x * 0x1010100;\n      tEnc = d[s] * 0x101 ^ s * 0x1010100;\n\n      for (i = 0; i < 4; i++) {\n        encTable[i][x] = tEnc = tEnc << 24 ^ tEnc >>> 8;\n        decTable[i][s] = tDec = tDec << 24 ^ tDec >>> 8;\n      }\n    } // Compactify. Considerable speedup on Firefox.\n\n\n    for (i = 0; i < 5; i++) {\n      encTable[i] = encTable[i].slice(0);\n      decTable[i] = decTable[i].slice(0);\n    }\n\n    return tables;\n  };\n\n  var aesTables = null;\n  /**\n   * Schedule out an AES key for both encryption and decryption. This\n   * is a low-level class. Use a cipher mode to do bulk encryption.\n   *\n   * @class AES\n   * @param key {Array} The key as an array of 4, 6 or 8 words.\n   */\n\n  var AES = /*#__PURE__*/function () {\n    function AES(key) {\n      /**\n      * The expanded S-box and inverse S-box tables. These will be computed\n      * on the client so that we don't have to send them down the wire.\n      *\n      * There are two tables, _tables[0] is for encryption and\n      * _tables[1] is for decryption.\n      *\n      * The first 4 sub-tables are the expanded S-box with MixColumns. The\n      * last (_tables[01][4]) is the S-box itself.\n      *\n      * @private\n      */\n      // if we have yet to precompute the S-box tables\n      // do so now\n      if (!aesTables) {\n        aesTables = precompute();\n      } // then make a copy of that object for use\n\n\n      this._tables = [[aesTables[0][0].slice(), aesTables[0][1].slice(), aesTables[0][2].slice(), aesTables[0][3].slice(), aesTables[0][4].slice()], [aesTables[1][0].slice(), aesTables[1][1].slice(), aesTables[1][2].slice(), aesTables[1][3].slice(), aesTables[1][4].slice()]];\n      var i;\n      var j;\n      var tmp;\n      var sbox = this._tables[0][4];\n      var decTable = this._tables[1];\n      var keyLen = key.length;\n      var rcon = 1;\n\n      if (keyLen !== 4 && keyLen !== 6 && keyLen !== 8) {\n        throw new Error('Invalid aes key size');\n      }\n\n      var encKey = key.slice(0);\n      var decKey = [];\n      this._key = [encKey, decKey]; // schedule encryption keys\n\n      for (i = keyLen; i < 4 * keyLen + 28; i++) {\n        tmp = encKey[i - 1]; // apply sbox\n\n        if (i % keyLen === 0 || keyLen === 8 && i % keyLen === 4) {\n          tmp = sbox[tmp >>> 24] << 24 ^ sbox[tmp >> 16 & 255] << 16 ^ sbox[tmp >> 8 & 255] << 8 ^ sbox[tmp & 255]; // shift rows and add rcon\n\n          if (i % keyLen === 0) {\n            tmp = tmp << 8 ^ tmp >>> 24 ^ rcon << 24;\n            rcon = rcon << 1 ^ (rcon >> 7) * 283;\n          }\n        }\n\n        encKey[i] = encKey[i - keyLen] ^ tmp;\n      } // schedule decryption keys\n\n\n      for (j = 0; i; j++, i--) {\n        tmp = encKey[j & 3 ? i : i - 4];\n\n        if (i <= 4 || j < 4) {\n          decKey[j] = tmp;\n        } else {\n          decKey[j] = decTable[0][sbox[tmp >>> 24]] ^ decTable[1][sbox[tmp >> 16 & 255]] ^ decTable[2][sbox[tmp >> 8 & 255]] ^ decTable[3][sbox[tmp & 255]];\n        }\n      }\n    }\n    /**\n     * Decrypt 16 bytes, specified as four 32-bit words.\n     *\n     * @param {number} encrypted0 the first word to decrypt\n     * @param {number} encrypted1 the second word to decrypt\n     * @param {number} encrypted2 the third word to decrypt\n     * @param {number} encrypted3 the fourth word to decrypt\n     * @param {Int32Array} out the array to write the decrypted words\n     * into\n     * @param {number} offset the offset into the output array to start\n     * writing results\n     * @return {Array} The plaintext.\n     */\n\n\n    var _proto = AES.prototype;\n\n    _proto.decrypt = function decrypt(encrypted0, encrypted1, encrypted2, encrypted3, out, offset) {\n      var key = this._key[1]; // state variables a,b,c,d are loaded with pre-whitened data\n\n      var a = encrypted0 ^ key[0];\n      var b = encrypted3 ^ key[1];\n      var c = encrypted2 ^ key[2];\n      var d = encrypted1 ^ key[3];\n      var a2;\n      var b2;\n      var c2; // key.length === 2 ?\n\n      var nInnerRounds = key.length / 4 - 2;\n      var i;\n      var kIndex = 4;\n      var table = this._tables[1]; // load up the tables\n\n      var table0 = table[0];\n      var table1 = table[1];\n      var table2 = table[2];\n      var table3 = table[3];\n      var sbox = table[4]; // Inner rounds. Cribbed from OpenSSL.\n\n      for (i = 0; i < nInnerRounds; i++) {\n        a2 = table0[a >>> 24] ^ table1[b >> 16 & 255] ^ table2[c >> 8 & 255] ^ table3[d & 255] ^ key[kIndex];\n        b2 = table0[b >>> 24] ^ table1[c >> 16 & 255] ^ table2[d >> 8 & 255] ^ table3[a & 255] ^ key[kIndex + 1];\n        c2 = table0[c >>> 24] ^ table1[d >> 16 & 255] ^ table2[a >> 8 & 255] ^ table3[b & 255] ^ key[kIndex + 2];\n        d = table0[d >>> 24] ^ table1[a >> 16 & 255] ^ table2[b >> 8 & 255] ^ table3[c & 255] ^ key[kIndex + 3];\n        kIndex += 4;\n        a = a2;\n        b = b2;\n        c = c2;\n      } // Last round.\n\n\n      for (i = 0; i < 4; i++) {\n        out[(3 & -i) + offset] = sbox[a >>> 24] << 24 ^ sbox[b >> 16 & 255] << 16 ^ sbox[c >> 8 & 255] << 8 ^ sbox[d & 255] ^ key[kIndex++];\n        a2 = a;\n        a = b;\n        b = c;\n        c = d;\n        d = a2;\n      }\n    };\n\n    return AES;\n  }();\n  /**\n   * A wrapper around the Stream class to use setTimeout\n   * and run stream \"jobs\" Asynchronously\n   *\n   * @class AsyncStream\n   * @extends Stream\n   */\n\n\n  var AsyncStream = /*#__PURE__*/function (_Stream) {\n    inheritsLoose(AsyncStream, _Stream);\n\n    function AsyncStream() {\n      var _this;\n\n      _this = _Stream.call(this, Stream) || this;\n      _this.jobs = [];\n      _this.delay = 1;\n      _this.timeout_ = null;\n      return _this;\n    }\n    /**\n     * process an async job\n     *\n     * @private\n     */\n\n\n    var _proto = AsyncStream.prototype;\n\n    _proto.processJob_ = function processJob_() {\n      this.jobs.shift()();\n\n      if (this.jobs.length) {\n        this.timeout_ = setTimeout(this.processJob_.bind(this), this.delay);\n      } else {\n        this.timeout_ = null;\n      }\n    }\n    /**\n     * push a job into the stream\n     *\n     * @param {Function} job the job to push into the stream\n     */\n    ;\n\n    _proto.push = function push(job) {\n      this.jobs.push(job);\n\n      if (!this.timeout_) {\n        this.timeout_ = setTimeout(this.processJob_.bind(this), this.delay);\n      }\n    };\n\n    return AsyncStream;\n  }(Stream);\n  /**\n   * Convert network-order (big-endian) bytes into their little-endian\n   * representation.\n   */\n\n\n  var ntoh = function ntoh(word) {\n    return word << 24 | (word & 0xff00) << 8 | (word & 0xff0000) >> 8 | word >>> 24;\n  };\n  /**\n   * Decrypt bytes using AES-128 with CBC and PKCS#7 padding.\n   *\n   * @param {Uint8Array} encrypted the encrypted bytes\n   * @param {Uint32Array} key the bytes of the decryption key\n   * @param {Uint32Array} initVector the initialization vector (IV) to\n   * use for the first round of CBC.\n   * @return {Uint8Array} the decrypted bytes\n   *\n   * @see http://en.wikipedia.org/wiki/Advanced_Encryption_Standard\n   * @see http://en.wikipedia.org/wiki/Block_cipher_mode_of_operation#Cipher_Block_Chaining_.28CBC.29\n   * @see https://tools.ietf.org/html/rfc2315\n   */\n\n\n  var decrypt = function decrypt(encrypted, key, initVector) {\n    // word-level access to the encrypted bytes\n    var encrypted32 = new Int32Array(encrypted.buffer, encrypted.byteOffset, encrypted.byteLength >> 2);\n    var decipher = new AES(Array.prototype.slice.call(key)); // byte and word-level access for the decrypted output\n\n    var decrypted = new Uint8Array(encrypted.byteLength);\n    var decrypted32 = new Int32Array(decrypted.buffer); // temporary variables for working with the IV, encrypted, and\n    // decrypted data\n\n    var init0;\n    var init1;\n    var init2;\n    var init3;\n    var encrypted0;\n    var encrypted1;\n    var encrypted2;\n    var encrypted3; // iteration variable\n\n    var wordIx; // pull out the words of the IV to ensure we don't modify the\n    // passed-in reference and easier access\n\n    init0 = initVector[0];\n    init1 = initVector[1];\n    init2 = initVector[2];\n    init3 = initVector[3]; // decrypt four word sequences, applying cipher-block chaining (CBC)\n    // to each decrypted block\n\n    for (wordIx = 0; wordIx < encrypted32.length; wordIx += 4) {\n      // convert big-endian (network order) words into little-endian\n      // (javascript order)\n      encrypted0 = ntoh(encrypted32[wordIx]);\n      encrypted1 = ntoh(encrypted32[wordIx + 1]);\n      encrypted2 = ntoh(encrypted32[wordIx + 2]);\n      encrypted3 = ntoh(encrypted32[wordIx + 3]); // decrypt the block\n\n      decipher.decrypt(encrypted0, encrypted1, encrypted2, encrypted3, decrypted32, wordIx); // XOR with the IV, and restore network byte-order to obtain the\n      // plaintext\n\n      decrypted32[wordIx] = ntoh(decrypted32[wordIx] ^ init0);\n      decrypted32[wordIx + 1] = ntoh(decrypted32[wordIx + 1] ^ init1);\n      decrypted32[wordIx + 2] = ntoh(decrypted32[wordIx + 2] ^ init2);\n      decrypted32[wordIx + 3] = ntoh(decrypted32[wordIx + 3] ^ init3); // setup the IV for the next round\n\n      init0 = encrypted0;\n      init1 = encrypted1;\n      init2 = encrypted2;\n      init3 = encrypted3;\n    }\n\n    return decrypted;\n  };\n  /**\n   * The `Decrypter` class that manages decryption of AES\n   * data through `AsyncStream` objects and the `decrypt`\n   * function\n   *\n   * @param {Uint8Array} encrypted the encrypted bytes\n   * @param {Uint32Array} key the bytes of the decryption key\n   * @param {Uint32Array} initVector the initialization vector (IV) to\n   * @param {Function} done the function to run when done\n   * @class Decrypter\n   */\n\n\n  var Decrypter = /*#__PURE__*/function () {\n    function Decrypter(encrypted, key, initVector, done) {\n      var step = Decrypter.STEP;\n      var encrypted32 = new Int32Array(encrypted.buffer);\n      var decrypted = new Uint8Array(encrypted.byteLength);\n      var i = 0;\n      this.asyncStream_ = new AsyncStream(); // split up the encryption job and do the individual chunks asynchronously\n\n      this.asyncStream_.push(this.decryptChunk_(encrypted32.subarray(i, i + step), key, initVector, decrypted));\n\n      for (i = step; i < encrypted32.length; i += step) {\n        initVector = new Uint32Array([ntoh(encrypted32[i - 4]), ntoh(encrypted32[i - 3]), ntoh(encrypted32[i - 2]), ntoh(encrypted32[i - 1])]);\n        this.asyncStream_.push(this.decryptChunk_(encrypted32.subarray(i, i + step), key, initVector, decrypted));\n      } // invoke the done() callback when everything is finished\n\n\n      this.asyncStream_.push(function () {\n        // remove pkcs#7 padding from the decrypted bytes\n        done(null, unpad(decrypted));\n      });\n    }\n    /**\n     * a getter for step the maximum number of bytes to process at one time\n     *\n     * @return {number} the value of step 32000\n     */\n\n\n    var _proto = Decrypter.prototype;\n    /**\n     * @private\n     */\n\n    _proto.decryptChunk_ = function decryptChunk_(encrypted, key, initVector, decrypted) {\n      return function () {\n        var bytes = decrypt(encrypted, key, initVector);\n        decrypted.set(bytes, encrypted.byteOffset);\n      };\n    };\n\n    createClass(Decrypter, null, [{\n      key: \"STEP\",\n      get: function get() {\n        // 4 * 8000;\n        return 32000;\n      }\n    }]);\n    return Decrypter;\n  }();\n  /**\n   * @file bin-utils.js\n   */\n\n  /**\n   * Creates an object for sending to a web worker modifying properties that are TypedArrays\n   * into a new object with seperated properties for the buffer, byteOffset, and byteLength.\n   *\n   * @param {Object} message\n   *        Object of properties and values to send to the web worker\n   * @return {Object}\n   *         Modified message with TypedArray values expanded\n   * @function createTransferableMessage\n   */\n\n\n  var createTransferableMessage = function createTransferableMessage(message) {\n    var transferable = {};\n    Object.keys(message).forEach(function (key) {\n      var value = message[key];\n\n      if (ArrayBuffer.isView(value)) {\n        transferable[key] = {\n          bytes: value.buffer,\n          byteOffset: value.byteOffset,\n          byteLength: value.byteLength\n        };\n      } else {\n        transferable[key] = value;\n      }\n    });\n    return transferable;\n  };\n  /* global self */\n\n  /**\n   * Our web worker interface so that things can talk to aes-decrypter\n   * that will be running in a web worker. the scope is passed to this by\n   * webworkify.\n   */\n\n\n  self.onmessage = function (event) {\n    var data = event.data;\n    var encrypted = new Uint8Array(data.encrypted.bytes, data.encrypted.byteOffset, data.encrypted.byteLength);\n    var key = new Uint32Array(data.key.bytes, data.key.byteOffset, data.key.byteLength / 4);\n    var iv = new Uint32Array(data.iv.bytes, data.iv.byteOffset, data.iv.byteLength / 4);\n    /* eslint-disable no-new, handle-callback-err */\n\n    new Decrypter(encrypted, key, iv, function (err, bytes) {\n      self.postMessage(createTransferableMessage({\n        source: data.source,\n        decrypted: bytes\n      }), [bytes.buffer]);\n    });\n    /* eslint-enable */\n  };\n}));\nvar Decrypter = factory(workerCode);\n/* rollup-plugin-worker-factory end for worker!/Users/gsinger/repos/clean/http-streaming/src/decrypter-worker.js */\n\n/**\n * Convert the properties of an HLS track into an audioTrackKind.\n *\n * @private\n */\n\nvar audioTrackKind_ = function audioTrackKind_(properties) {\n  var kind = properties[\"default\"] ? 'main' : 'alternative';\n\n  if (properties.characteristics && properties.characteristics.indexOf('public.accessibility.describes-video') >= 0) {\n    kind = 'main-desc';\n  }\n\n  return kind;\n};\n/**\n * Pause provided segment loader and playlist loader if active\n *\n * @param {SegmentLoader} segmentLoader\n *        SegmentLoader to pause\n * @param {Object} mediaType\n *        Active media type\n * @function stopLoaders\n */\n\n\nvar stopLoaders = function stopLoaders(segmentLoader, mediaType) {\n  segmentLoader.abort();\n  segmentLoader.pause();\n\n  if (mediaType && mediaType.activePlaylistLoader) {\n    mediaType.activePlaylistLoader.pause();\n    mediaType.activePlaylistLoader = null;\n  }\n};\n/**\n * Start loading provided segment loader and playlist loader\n *\n * @param {PlaylistLoader} playlistLoader\n *        PlaylistLoader to start loading\n * @param {Object} mediaType\n *        Active media type\n * @function startLoaders\n */\n\n\nvar startLoaders = function startLoaders(playlistLoader, mediaType) {\n  // Segment loader will be started after `loadedmetadata` or `loadedplaylist` from the\n  // playlist loader\n  mediaType.activePlaylistLoader = playlistLoader;\n  playlistLoader.load();\n};\n/**\n * Returns a function to be called when the media group changes. It performs a\n * non-destructive (preserve the buffer) resync of the SegmentLoader. This is because a\n * change of group is merely a rendition switch of the same content at another encoding,\n * rather than a change of content, such as switching audio from English to Spanish.\n *\n * @param {string} type\n *        MediaGroup type\n * @param {Object} settings\n *        Object containing required information for media groups\n * @return {Function}\n *         Handler for a non-destructive resync of SegmentLoader when the active media\n *         group changes.\n * @function onGroupChanged\n */\n\n\nvar onGroupChanged = function onGroupChanged(type, settings) {\n  return function () {\n    var _settings$segmentLoad = settings.segmentLoaders,\n        segmentLoader = _settings$segmentLoad[type],\n        mainSegmentLoader = _settings$segmentLoad.main,\n        mediaType = settings.mediaTypes[type];\n    var activeTrack = mediaType.activeTrack();\n    var activeGroup = mediaType.getActiveGroup();\n    var previousActiveLoader = mediaType.activePlaylistLoader;\n    var lastGroup = mediaType.lastGroup_; // the group did not change do nothing\n\n    if (activeGroup && lastGroup && activeGroup.id === lastGroup.id) {\n      return;\n    }\n\n    mediaType.lastGroup_ = activeGroup;\n    mediaType.lastTrack_ = activeTrack;\n    stopLoaders(segmentLoader, mediaType);\n\n    if (!activeGroup || activeGroup.isMasterPlaylist) {\n      // there is no group active or active group is a main playlist and won't change\n      return;\n    }\n\n    if (!activeGroup.playlistLoader) {\n      if (previousActiveLoader) {\n        // The previous group had a playlist loader but the new active group does not\n        // this means we are switching from demuxed to muxed audio. In this case we want to\n        // do a destructive reset of the main segment loader and not restart the audio\n        // loaders.\n        mainSegmentLoader.resetEverything();\n      }\n\n      return;\n    } // Non-destructive resync\n\n\n    segmentLoader.resyncLoader();\n    startLoaders(activeGroup.playlistLoader, mediaType);\n  };\n};\n\nvar onGroupChanging = function onGroupChanging(type, settings) {\n  return function () {\n    var segmentLoader = settings.segmentLoaders[type],\n        mediaType = settings.mediaTypes[type];\n    mediaType.lastGroup_ = null;\n    segmentLoader.abort();\n    segmentLoader.pause();\n  };\n};\n/**\n * Returns a function to be called when the media track changes. It performs a\n * destructive reset of the SegmentLoader to ensure we start loading as close to\n * currentTime as possible.\n *\n * @param {string} type\n *        MediaGroup type\n * @param {Object} settings\n *        Object containing required information for media groups\n * @return {Function}\n *         Handler for a destructive reset of SegmentLoader when the active media\n *         track changes.\n * @function onTrackChanged\n */\n\n\nvar onTrackChanged = function onTrackChanged(type, settings) {\n  return function () {\n    var masterPlaylistLoader = settings.masterPlaylistLoader,\n        _settings$segmentLoad2 = settings.segmentLoaders,\n        segmentLoader = _settings$segmentLoad2[type],\n        mainSegmentLoader = _settings$segmentLoad2.main,\n        mediaType = settings.mediaTypes[type];\n    var activeTrack = mediaType.activeTrack();\n    var activeGroup = mediaType.getActiveGroup();\n    var previousActiveLoader = mediaType.activePlaylistLoader;\n    var lastTrack = mediaType.lastTrack_; // track did not change, do nothing\n\n    if (lastTrack && activeTrack && lastTrack.id === activeTrack.id) {\n      return;\n    }\n\n    mediaType.lastGroup_ = activeGroup;\n    mediaType.lastTrack_ = activeTrack;\n    stopLoaders(segmentLoader, mediaType);\n\n    if (!activeGroup) {\n      // there is no group active so we do not want to restart loaders\n      return;\n    }\n\n    if (activeGroup.isMasterPlaylist) {\n      // track did not change, do nothing\n      if (!activeTrack || !lastTrack || activeTrack.id === lastTrack.id) {\n        return;\n      }\n\n      var mpc = settings.vhs.masterPlaylistController_;\n      var newPlaylist = mpc.selectPlaylist(); // media will not change do nothing\n\n      if (mpc.media() === newPlaylist) {\n        return;\n      }\n\n      mediaType.logger_(\"track change. Switching master audio from \" + lastTrack.id + \" to \" + activeTrack.id);\n      masterPlaylistLoader.pause();\n      mainSegmentLoader.resetEverything();\n      mpc.fastQualityChange_(newPlaylist);\n      return;\n    }\n\n    if (type === 'AUDIO') {\n      if (!activeGroup.playlistLoader) {\n        // when switching from demuxed audio/video to muxed audio/video (noted by no\n        // playlist loader for the audio group), we want to do a destructive reset of the\n        // main segment loader and not restart the audio loaders\n        mainSegmentLoader.setAudio(true); // don't have to worry about disabling the audio of the audio segment loader since\n        // it should be stopped\n\n        mainSegmentLoader.resetEverything();\n        return;\n      } // although the segment loader is an audio segment loader, call the setAudio\n      // function to ensure it is prepared to re-append the init segment (or handle other\n      // config changes)\n\n\n      segmentLoader.setAudio(true);\n      mainSegmentLoader.setAudio(false);\n    }\n\n    if (previousActiveLoader === activeGroup.playlistLoader) {\n      // Nothing has actually changed. This can happen because track change events can fire\n      // multiple times for a \"single\" change. One for enabling the new active track, and\n      // one for disabling the track that was active\n      startLoaders(activeGroup.playlistLoader, mediaType);\n      return;\n    }\n\n    if (segmentLoader.track) {\n      // For WebVTT, set the new text track in the segmentloader\n      segmentLoader.track(activeTrack);\n    } // destructive reset\n\n\n    segmentLoader.resetEverything();\n    startLoaders(activeGroup.playlistLoader, mediaType);\n  };\n};\n\nvar onError = {\n  /**\n   * Returns a function to be called when a SegmentLoader or PlaylistLoader encounters\n   * an error.\n   *\n   * @param {string} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @return {Function}\n   *         Error handler. Logs warning (or error if the playlist is blacklisted) to\n   *         console and switches back to default audio track.\n   * @function onError.AUDIO\n   */\n  AUDIO: function AUDIO(type, settings) {\n    return function () {\n      var segmentLoader = settings.segmentLoaders[type],\n          mediaType = settings.mediaTypes[type],\n          blacklistCurrentPlaylist = settings.blacklistCurrentPlaylist;\n      stopLoaders(segmentLoader, mediaType); // switch back to default audio track\n\n      var activeTrack = mediaType.activeTrack();\n      var activeGroup = mediaType.activeGroup();\n      var id = (activeGroup.filter(function (group) {\n        return group[\"default\"];\n      })[0] || activeGroup[0]).id;\n      var defaultTrack = mediaType.tracks[id];\n\n      if (activeTrack === defaultTrack) {\n        // Default track encountered an error. All we can do now is blacklist the current\n        // rendition and hope another will switch audio groups\n        blacklistCurrentPlaylist({\n          message: 'Problem encountered loading the default audio track.'\n        });\n        return;\n      }\n\n      videojs.log.warn('Problem encountered loading the alternate audio track.' + 'Switching back to default.');\n\n      for (var trackId in mediaType.tracks) {\n        mediaType.tracks[trackId].enabled = mediaType.tracks[trackId] === defaultTrack;\n      }\n\n      mediaType.onTrackChanged();\n    };\n  },\n\n  /**\n   * Returns a function to be called when a SegmentLoader or PlaylistLoader encounters\n   * an error.\n   *\n   * @param {string} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @return {Function}\n   *         Error handler. Logs warning to console and disables the active subtitle track\n   * @function onError.SUBTITLES\n   */\n  SUBTITLES: function SUBTITLES(type, settings) {\n    return function () {\n      var segmentLoader = settings.segmentLoaders[type],\n          mediaType = settings.mediaTypes[type];\n      videojs.log.warn('Problem encountered loading the subtitle track.' + 'Disabling subtitle track.');\n      stopLoaders(segmentLoader, mediaType);\n      var track = mediaType.activeTrack();\n\n      if (track) {\n        track.mode = 'disabled';\n      }\n\n      mediaType.onTrackChanged();\n    };\n  }\n};\nvar setupListeners = {\n  /**\n   * Setup event listeners for audio playlist loader\n   *\n   * @param {string} type\n   *        MediaGroup type\n   * @param {PlaylistLoader|null} playlistLoader\n   *        PlaylistLoader to register listeners on\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @function setupListeners.AUDIO\n   */\n  AUDIO: function AUDIO(type, playlistLoader, settings) {\n    if (!playlistLoader) {\n      // no playlist loader means audio will be muxed with the video\n      return;\n    }\n\n    var tech = settings.tech,\n        requestOptions = settings.requestOptions,\n        segmentLoader = settings.segmentLoaders[type];\n    playlistLoader.on('loadedmetadata', function () {\n      var media = playlistLoader.media();\n      segmentLoader.playlist(media, requestOptions); // if the video is already playing, or if this isn't a live video and preload\n      // permits, start downloading segments\n\n      if (!tech.paused() || media.endList && tech.preload() !== 'none') {\n        segmentLoader.load();\n      }\n    });\n    playlistLoader.on('loadedplaylist', function () {\n      segmentLoader.playlist(playlistLoader.media(), requestOptions); // If the player isn't paused, ensure that the segment loader is running\n\n      if (!tech.paused()) {\n        segmentLoader.load();\n      }\n    });\n    playlistLoader.on('error', onError[type](type, settings));\n  },\n\n  /**\n   * Setup event listeners for subtitle playlist loader\n   *\n   * @param {string} type\n   *        MediaGroup type\n   * @param {PlaylistLoader|null} playlistLoader\n   *        PlaylistLoader to register listeners on\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @function setupListeners.SUBTITLES\n   */\n  SUBTITLES: function SUBTITLES(type, playlistLoader, settings) {\n    var tech = settings.tech,\n        requestOptions = settings.requestOptions,\n        segmentLoader = settings.segmentLoaders[type],\n        mediaType = settings.mediaTypes[type];\n    playlistLoader.on('loadedmetadata', function () {\n      var media = playlistLoader.media();\n      segmentLoader.playlist(media, requestOptions);\n      segmentLoader.track(mediaType.activeTrack()); // if the video is already playing, or if this isn't a live video and preload\n      // permits, start downloading segments\n\n      if (!tech.paused() || media.endList && tech.preload() !== 'none') {\n        segmentLoader.load();\n      }\n    });\n    playlistLoader.on('loadedplaylist', function () {\n      segmentLoader.playlist(playlistLoader.media(), requestOptions); // If the player isn't paused, ensure that the segment loader is running\n\n      if (!tech.paused()) {\n        segmentLoader.load();\n      }\n    });\n    playlistLoader.on('error', onError[type](type, settings));\n  }\n};\nvar initialize = {\n  /**\n   * Setup PlaylistLoaders and AudioTracks for the audio groups\n   *\n   * @param {string} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @function initialize.AUDIO\n   */\n  'AUDIO': function AUDIO(type, settings) {\n    var vhs = settings.vhs,\n        sourceType = settings.sourceType,\n        segmentLoader = settings.segmentLoaders[type],\n        requestOptions = settings.requestOptions,\n        mediaGroups = settings.master.mediaGroups,\n        _settings$mediaTypes$ = settings.mediaTypes[type],\n        groups = _settings$mediaTypes$.groups,\n        tracks = _settings$mediaTypes$.tracks,\n        logger_ = _settings$mediaTypes$.logger_,\n        masterPlaylistLoader = settings.masterPlaylistLoader;\n    var audioOnlyMaster = isAudioOnly(masterPlaylistLoader.master); // force a default if we have none\n\n    if (!mediaGroups[type] || Object.keys(mediaGroups[type]).length === 0) {\n      mediaGroups[type] = {\n        main: {\n          \"default\": {\n            \"default\": true\n          }\n        }\n      };\n\n      if (audioOnlyMaster) {\n        mediaGroups[type].main[\"default\"].playlists = masterPlaylistLoader.master.playlists;\n      }\n    }\n\n    for (var groupId in mediaGroups[type]) {\n      if (!groups[groupId]) {\n        groups[groupId] = [];\n      }\n\n      for (var variantLabel in mediaGroups[type][groupId]) {\n        var properties = mediaGroups[type][groupId][variantLabel];\n        var playlistLoader = void 0;\n\n        if (audioOnlyMaster) {\n          logger_(\"AUDIO group '\" + groupId + \"' label '\" + variantLabel + \"' is a master playlist\");\n          properties.isMasterPlaylist = true;\n          playlistLoader = null; // if vhs-json was provided as the source, and the media playlist was resolved,\n          // use the resolved media playlist object\n        } else if (sourceType === 'vhs-json' && properties.playlists) {\n          playlistLoader = new PlaylistLoader(properties.playlists[0], vhs, requestOptions);\n        } else if (properties.resolvedUri) {\n          playlistLoader = new PlaylistLoader(properties.resolvedUri, vhs, requestOptions); // TODO: dash isn't the only type with properties.playlists\n          // should we even have properties.playlists in this check.\n        } else if (properties.playlists && sourceType === 'dash') {\n          playlistLoader = new DashPlaylistLoader(properties.playlists[0], vhs, requestOptions, masterPlaylistLoader);\n        } else {\n          // no resolvedUri means the audio is muxed with the video when using this\n          // audio track\n          playlistLoader = null;\n        }\n\n        properties = videojs.mergeOptions({\n          id: variantLabel,\n          playlistLoader: playlistLoader\n        }, properties);\n        setupListeners[type](type, properties.playlistLoader, settings);\n        groups[groupId].push(properties);\n\n        if (typeof tracks[variantLabel] === 'undefined') {\n          var track = new videojs.AudioTrack({\n            id: variantLabel,\n            kind: audioTrackKind_(properties),\n            enabled: false,\n            language: properties.language,\n            \"default\": properties[\"default\"],\n            label: variantLabel\n          });\n          tracks[variantLabel] = track;\n        }\n      }\n    } // setup single error event handler for the segment loader\n\n\n    segmentLoader.on('error', onError[type](type, settings));\n  },\n\n  /**\n   * Setup PlaylistLoaders and TextTracks for the subtitle groups\n   *\n   * @param {string} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @function initialize.SUBTITLES\n   */\n  'SUBTITLES': function SUBTITLES(type, settings) {\n    var tech = settings.tech,\n        vhs = settings.vhs,\n        sourceType = settings.sourceType,\n        segmentLoader = settings.segmentLoaders[type],\n        requestOptions = settings.requestOptions,\n        mediaGroups = settings.master.mediaGroups,\n        _settings$mediaTypes$2 = settings.mediaTypes[type],\n        groups = _settings$mediaTypes$2.groups,\n        tracks = _settings$mediaTypes$2.tracks,\n        masterPlaylistLoader = settings.masterPlaylistLoader;\n\n    for (var groupId in mediaGroups[type]) {\n      if (!groups[groupId]) {\n        groups[groupId] = [];\n      }\n\n      for (var variantLabel in mediaGroups[type][groupId]) {\n        if (mediaGroups[type][groupId][variantLabel].forced) {\n          // Subtitle playlists with the forced attribute are not selectable in Safari.\n          // According to Apple's HLS Authoring Specification:\n          //   If content has forced subtitles and regular subtitles in a given language,\n          //   the regular subtitles track in that language MUST contain both the forced\n          //   subtitles and the regular subtitles for that language.\n          // Because of this requirement and that Safari does not add forced subtitles,\n          // forced subtitles are skipped here to maintain consistent experience across\n          // all platforms\n          continue;\n        }\n\n        var properties = mediaGroups[type][groupId][variantLabel];\n        var playlistLoader = void 0;\n\n        if (sourceType === 'hls') {\n          playlistLoader = new PlaylistLoader(properties.resolvedUri, vhs, requestOptions);\n        } else if (sourceType === 'dash') {\n          var playlists = properties.playlists.filter(function (p) {\n            return p.excludeUntil !== Infinity;\n          });\n\n          if (!playlists.length) {\n            return;\n          }\n\n          playlistLoader = new DashPlaylistLoader(properties.playlists[0], vhs, requestOptions, masterPlaylistLoader);\n        } else if (sourceType === 'vhs-json') {\n          playlistLoader = new PlaylistLoader( // if the vhs-json object included the media playlist, use the media playlist\n          // as provided, otherwise use the resolved URI to load the playlist\n          properties.playlists ? properties.playlists[0] : properties.resolvedUri, vhs, requestOptions);\n        }\n\n        properties = videojs.mergeOptions({\n          id: variantLabel,\n          playlistLoader: playlistLoader\n        }, properties);\n        setupListeners[type](type, properties.playlistLoader, settings);\n        groups[groupId].push(properties);\n\n        if (typeof tracks[variantLabel] === 'undefined') {\n          var track = tech.addRemoteTextTrack({\n            id: variantLabel,\n            kind: 'subtitles',\n            \"default\": properties[\"default\"] && properties.autoselect,\n            language: properties.language,\n            label: variantLabel\n          }, false).track;\n          tracks[variantLabel] = track;\n        }\n      }\n    } // setup single error event handler for the segment loader\n\n\n    segmentLoader.on('error', onError[type](type, settings));\n  },\n\n  /**\n   * Setup TextTracks for the closed-caption groups\n   *\n   * @param {String} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @function initialize['CLOSED-CAPTIONS']\n   */\n  'CLOSED-CAPTIONS': function CLOSEDCAPTIONS(type, settings) {\n    var tech = settings.tech,\n        mediaGroups = settings.master.mediaGroups,\n        _settings$mediaTypes$3 = settings.mediaTypes[type],\n        groups = _settings$mediaTypes$3.groups,\n        tracks = _settings$mediaTypes$3.tracks;\n\n    for (var groupId in mediaGroups[type]) {\n      if (!groups[groupId]) {\n        groups[groupId] = [];\n      }\n\n      for (var variantLabel in mediaGroups[type][groupId]) {\n        var properties = mediaGroups[type][groupId][variantLabel]; // Look for either 608 (CCn) or 708 (SERVICEn) caption services\n\n        if (!/^(?:CC|SERVICE)/.test(properties.instreamId)) {\n          continue;\n        }\n\n        var captionServices = tech.options_.vhs && tech.options_.vhs.captionServices || {};\n        var newProps = {\n          label: variantLabel,\n          language: properties.language,\n          instreamId: properties.instreamId,\n          \"default\": properties[\"default\"] && properties.autoselect\n        };\n\n        if (captionServices[newProps.instreamId]) {\n          newProps = videojs.mergeOptions(newProps, captionServices[newProps.instreamId]);\n        }\n\n        if (newProps[\"default\"] === undefined) {\n          delete newProps[\"default\"];\n        } // No PlaylistLoader is required for Closed-Captions because the captions are\n        // embedded within the video stream\n\n\n        groups[groupId].push(videojs.mergeOptions({\n          id: variantLabel\n        }, properties));\n\n        if (typeof tracks[variantLabel] === 'undefined') {\n          var track = tech.addRemoteTextTrack({\n            id: newProps.instreamId,\n            kind: 'captions',\n            \"default\": newProps[\"default\"],\n            language: newProps.language,\n            label: newProps.label\n          }, false).track;\n          tracks[variantLabel] = track;\n        }\n      }\n    }\n  }\n};\n\nvar groupMatch = function groupMatch(list, media) {\n  for (var i = 0; i < list.length; i++) {\n    if (playlistMatch(media, list[i])) {\n      return true;\n    }\n\n    if (list[i].playlists && groupMatch(list[i].playlists, media)) {\n      return true;\n    }\n  }\n\n  return false;\n};\n/**\n * Returns a function used to get the active group of the provided type\n *\n * @param {string} type\n *        MediaGroup type\n * @param {Object} settings\n *        Object containing required information for media groups\n * @return {Function}\n *         Function that returns the active media group for the provided type. Takes an\n *         optional parameter {TextTrack} track. If no track is provided, a list of all\n *         variants in the group, otherwise the variant corresponding to the provided\n *         track is returned.\n * @function activeGroup\n */\n\n\nvar activeGroup = function activeGroup(type, settings) {\n  return function (track) {\n    var masterPlaylistLoader = settings.masterPlaylistLoader,\n        groups = settings.mediaTypes[type].groups;\n    var media = masterPlaylistLoader.media();\n\n    if (!media) {\n      return null;\n    }\n\n    var variants = null; // set to variants to main media active group\n\n    if (media.attributes[type]) {\n      variants = groups[media.attributes[type]];\n    }\n\n    var groupKeys = Object.keys(groups);\n\n    if (!variants) {\n      // find the masterPlaylistLoader media\n      // that is in a media group if we are dealing\n      // with audio only\n      if (type === 'AUDIO' && groupKeys.length > 1 && isAudioOnly(settings.master)) {\n        for (var i = 0; i < groupKeys.length; i++) {\n          var groupPropertyList = groups[groupKeys[i]];\n\n          if (groupMatch(groupPropertyList, media)) {\n            variants = groupPropertyList;\n            break;\n          }\n        } // use the main group if it exists\n\n      } else if (groups.main) {\n        variants = groups.main; // only one group, use that one\n      } else if (groupKeys.length === 1) {\n        variants = groups[groupKeys[0]];\n      }\n    }\n\n    if (typeof track === 'undefined') {\n      return variants;\n    }\n\n    if (track === null || !variants) {\n      // An active track was specified so a corresponding group is expected. track === null\n      // means no track is currently active so there is no corresponding group\n      return null;\n    }\n\n    return variants.filter(function (props) {\n      return props.id === track.id;\n    })[0] || null;\n  };\n};\n\nvar activeTrack = {\n  /**\n   * Returns a function used to get the active track of type provided\n   *\n   * @param {string} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @return {Function}\n   *         Function that returns the active media track for the provided type. Returns\n   *         null if no track is active\n   * @function activeTrack.AUDIO\n   */\n  AUDIO: function AUDIO(type, settings) {\n    return function () {\n      var tracks = settings.mediaTypes[type].tracks;\n\n      for (var id in tracks) {\n        if (tracks[id].enabled) {\n          return tracks[id];\n        }\n      }\n\n      return null;\n    };\n  },\n\n  /**\n   * Returns a function used to get the active track of type provided\n   *\n   * @param {string} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @return {Function}\n   *         Function that returns the active media track for the provided type. Returns\n   *         null if no track is active\n   * @function activeTrack.SUBTITLES\n   */\n  SUBTITLES: function SUBTITLES(type, settings) {\n    return function () {\n      var tracks = settings.mediaTypes[type].tracks;\n\n      for (var id in tracks) {\n        if (tracks[id].mode === 'showing' || tracks[id].mode === 'hidden') {\n          return tracks[id];\n        }\n      }\n\n      return null;\n    };\n  }\n};\n\nvar getActiveGroup = function getActiveGroup(type, _ref) {\n  var mediaTypes = _ref.mediaTypes;\n  return function () {\n    var activeTrack_ = mediaTypes[type].activeTrack();\n\n    if (!activeTrack_) {\n      return null;\n    }\n\n    return mediaTypes[type].activeGroup(activeTrack_);\n  };\n};\n/**\n * Setup PlaylistLoaders and Tracks for media groups (Audio, Subtitles,\n * Closed-Captions) specified in the master manifest.\n *\n * @param {Object} settings\n *        Object containing required information for setting up the media groups\n * @param {Tech} settings.tech\n *        The tech of the player\n * @param {Object} settings.requestOptions\n *        XHR request options used by the segment loaders\n * @param {PlaylistLoader} settings.masterPlaylistLoader\n *        PlaylistLoader for the master source\n * @param {VhsHandler} settings.vhs\n *        VHS SourceHandler\n * @param {Object} settings.master\n *        The parsed master manifest\n * @param {Object} settings.mediaTypes\n *        Object to store the loaders, tracks, and utility methods for each media type\n * @param {Function} settings.blacklistCurrentPlaylist\n *        Blacklists the current rendition and forces a rendition switch.\n * @function setupMediaGroups\n */\n\n\nvar setupMediaGroups = function setupMediaGroups(settings) {\n  ['AUDIO', 'SUBTITLES', 'CLOSED-CAPTIONS'].forEach(function (type) {\n    initialize[type](type, settings);\n  });\n  var mediaTypes = settings.mediaTypes,\n      masterPlaylistLoader = settings.masterPlaylistLoader,\n      tech = settings.tech,\n      vhs = settings.vhs,\n      _settings$segmentLoad3 = settings.segmentLoaders,\n      audioSegmentLoader = _settings$segmentLoad3['AUDIO'],\n      mainSegmentLoader = _settings$segmentLoad3.main; // setup active group and track getters and change event handlers\n\n  ['AUDIO', 'SUBTITLES'].forEach(function (type) {\n    mediaTypes[type].activeGroup = activeGroup(type, settings);\n    mediaTypes[type].activeTrack = activeTrack[type](type, settings);\n    mediaTypes[type].onGroupChanged = onGroupChanged(type, settings);\n    mediaTypes[type].onGroupChanging = onGroupChanging(type, settings);\n    mediaTypes[type].onTrackChanged = onTrackChanged(type, settings);\n    mediaTypes[type].getActiveGroup = getActiveGroup(type, settings);\n  }); // DO NOT enable the default subtitle or caption track.\n  // DO enable the default audio track\n\n  var audioGroup = mediaTypes.AUDIO.activeGroup();\n\n  if (audioGroup) {\n    var groupId = (audioGroup.filter(function (group) {\n      return group[\"default\"];\n    })[0] || audioGroup[0]).id;\n    mediaTypes.AUDIO.tracks[groupId].enabled = true;\n    mediaTypes.AUDIO.onGroupChanged();\n    mediaTypes.AUDIO.onTrackChanged();\n    var activeAudioGroup = mediaTypes.AUDIO.getActiveGroup(); // a similar check for handling setAudio on each loader is run again each time the\n    // track is changed, but needs to be handled here since the track may not be considered\n    // changed on the first call to onTrackChanged\n\n    if (!activeAudioGroup.playlistLoader) {\n      // either audio is muxed with video or the stream is audio only\n      mainSegmentLoader.setAudio(true);\n    } else {\n      // audio is demuxed\n      mainSegmentLoader.setAudio(false);\n      audioSegmentLoader.setAudio(true);\n    }\n  }\n\n  masterPlaylistLoader.on('mediachange', function () {\n    ['AUDIO', 'SUBTITLES'].forEach(function (type) {\n      return mediaTypes[type].onGroupChanged();\n    });\n  });\n  masterPlaylistLoader.on('mediachanging', function () {\n    ['AUDIO', 'SUBTITLES'].forEach(function (type) {\n      return mediaTypes[type].onGroupChanging();\n    });\n  }); // custom audio track change event handler for usage event\n\n  var onAudioTrackChanged = function onAudioTrackChanged() {\n    mediaTypes.AUDIO.onTrackChanged();\n    tech.trigger({\n      type: 'usage',\n      name: 'vhs-audio-change'\n    });\n    tech.trigger({\n      type: 'usage',\n      name: 'hls-audio-change'\n    });\n  };\n\n  tech.audioTracks().addEventListener('change', onAudioTrackChanged);\n  tech.remoteTextTracks().addEventListener('change', mediaTypes.SUBTITLES.onTrackChanged);\n  vhs.on('dispose', function () {\n    tech.audioTracks().removeEventListener('change', onAudioTrackChanged);\n    tech.remoteTextTracks().removeEventListener('change', mediaTypes.SUBTITLES.onTrackChanged);\n  }); // clear existing audio tracks and add the ones we just created\n\n  tech.clearTracks('audio');\n\n  for (var id in mediaTypes.AUDIO.tracks) {\n    tech.audioTracks().addTrack(mediaTypes.AUDIO.tracks[id]);\n  }\n};\n/**\n * Creates skeleton object used to store the loaders, tracks, and utility methods for each\n * media type\n *\n * @return {Object}\n *         Object to store the loaders, tracks, and utility methods for each media type\n * @function createMediaTypes\n */\n\n\nvar createMediaTypes = function createMediaTypes() {\n  var mediaTypes = {};\n  ['AUDIO', 'SUBTITLES', 'CLOSED-CAPTIONS'].forEach(function (type) {\n    mediaTypes[type] = {\n      groups: {},\n      tracks: {},\n      activePlaylistLoader: null,\n      activeGroup: noop,\n      activeTrack: noop,\n      getActiveGroup: noop,\n      onGroupChanged: noop,\n      onTrackChanged: noop,\n      lastTrack_: null,\n      logger_: logger(\"MediaGroups[\" + type + \"]\")\n    };\n  });\n  return mediaTypes;\n};\n\nvar ABORT_EARLY_BLACKLIST_SECONDS = 60 * 2;\nvar Vhs$1; // SegmentLoader stats that need to have each loader's\n// values summed to calculate the final value\n\nvar loaderStats = ['mediaRequests', 'mediaRequestsAborted', 'mediaRequestsTimedout', 'mediaRequestsErrored', 'mediaTransferDuration', 'mediaBytesTransferred', 'mediaAppends'];\n\nvar sumLoaderStat = function sumLoaderStat(stat) {\n  return this.audioSegmentLoader_[stat] + this.mainSegmentLoader_[stat];\n};\n\nvar shouldSwitchToMedia = function shouldSwitchToMedia(_ref) {\n  var currentPlaylist = _ref.currentPlaylist,\n      buffered = _ref.buffered,\n      currentTime = _ref.currentTime,\n      nextPlaylist = _ref.nextPlaylist,\n      bufferLowWaterLine = _ref.bufferLowWaterLine,\n      bufferHighWaterLine = _ref.bufferHighWaterLine,\n      duration = _ref.duration,\n      experimentalBufferBasedABR = _ref.experimentalBufferBasedABR,\n      log = _ref.log; // we have no other playlist to switch to\n\n  if (!nextPlaylist) {\n    videojs.log.warn('We received no playlist to switch to. Please check your stream.');\n    return false;\n  }\n\n  var sharedLogLine = \"allowing switch \" + (currentPlaylist && currentPlaylist.id || 'null') + \" -> \" + nextPlaylist.id;\n\n  if (!currentPlaylist) {\n    log(sharedLogLine + \" as current playlist is not set\");\n    return true;\n  } // no need to switch if playlist is the same\n\n\n  if (nextPlaylist.id === currentPlaylist.id) {\n    return false;\n  } // determine if current time is in a buffered range.\n\n\n  var isBuffered = Boolean(findRange(buffered, currentTime).length); // If the playlist is live, then we want to not take low water line into account.\n  // This is because in LIVE, the player plays 3 segments from the end of the\n  // playlist, and if `BUFFER_LOW_WATER_LINE` is greater than the duration availble\n  // in those segments, a viewer will never experience a rendition upswitch.\n\n  if (!currentPlaylist.endList) {\n    // For LLHLS live streams, don't switch renditions before playback has started, as it almost\n    // doubles the time to first playback.\n    if (!isBuffered && typeof currentPlaylist.partTargetDuration === 'number') {\n      log(\"not \" + sharedLogLine + \" as current playlist is live llhls, but currentTime isn't in buffered.\");\n      return false;\n    }\n\n    log(sharedLogLine + \" as current playlist is live\");\n    return true;\n  }\n\n  var forwardBuffer = timeAheadOf(buffered, currentTime);\n  var maxBufferLowWaterLine = experimentalBufferBasedABR ? Config.EXPERIMENTAL_MAX_BUFFER_LOW_WATER_LINE : Config.MAX_BUFFER_LOW_WATER_LINE; // For the same reason as LIVE, we ignore the low water line when the VOD\n  // duration is below the max potential low water line\n\n  if (duration < maxBufferLowWaterLine) {\n    log(sharedLogLine + \" as duration < max low water line (\" + duration + \" < \" + maxBufferLowWaterLine + \")\");\n    return true;\n  }\n\n  var nextBandwidth = nextPlaylist.attributes.BANDWIDTH;\n  var currBandwidth = currentPlaylist.attributes.BANDWIDTH; // when switching down, if our buffer is lower than the high water line,\n  // we can switch down\n\n  if (nextBandwidth < currBandwidth && (!experimentalBufferBasedABR || forwardBuffer < bufferHighWaterLine)) {\n    var logLine = sharedLogLine + \" as next bandwidth < current bandwidth (\" + nextBandwidth + \" < \" + currBandwidth + \")\";\n\n    if (experimentalBufferBasedABR) {\n      logLine += \" and forwardBuffer < bufferHighWaterLine (\" + forwardBuffer + \" < \" + bufferHighWaterLine + \")\";\n    }\n\n    log(logLine);\n    return true;\n  } // and if our buffer is higher than the low water line,\n  // we can switch up\n\n\n  if ((!experimentalBufferBasedABR || nextBandwidth > currBandwidth) && forwardBuffer >= bufferLowWaterLine) {\n    var _logLine = sharedLogLine + \" as forwardBuffer >= bufferLowWaterLine (\" + forwardBuffer + \" >= \" + bufferLowWaterLine + \")\";\n\n    if (experimentalBufferBasedABR) {\n      _logLine += \" and next bandwidth > current bandwidth (\" + nextBandwidth + \" > \" + currBandwidth + \")\";\n    }\n\n    log(_logLine);\n    return true;\n  }\n\n  log(\"not \" + sharedLogLine + \" as no switching criteria met\");\n  return false;\n};\n/**\n * the master playlist controller controller all interactons\n * between playlists and segmentloaders. At this time this mainly\n * involves a master playlist and a series of audio playlists\n * if they are available\n *\n * @class MasterPlaylistController\n * @extends videojs.EventTarget\n */\n\n\nvar MasterPlaylistController = /*#__PURE__*/function (_videojs$EventTarget) {\n  _inheritsLoose(MasterPlaylistController, _videojs$EventTarget);\n\n  function MasterPlaylistController(options) {\n    var _this;\n\n    _this = _videojs$EventTarget.call(this) || this;\n    var src = options.src,\n        handleManifestRedirects = options.handleManifestRedirects,\n        withCredentials = options.withCredentials,\n        tech = options.tech,\n        bandwidth = options.bandwidth,\n        externVhs = options.externVhs,\n        useCueTags = options.useCueTags,\n        blacklistDuration = options.blacklistDuration,\n        enableLowInitialPlaylist = options.enableLowInitialPlaylist,\n        sourceType = options.sourceType,\n        cacheEncryptionKeys = options.cacheEncryptionKeys,\n        experimentalBufferBasedABR = options.experimentalBufferBasedABR,\n        experimentalLeastPixelDiffSelector = options.experimentalLeastPixelDiffSelector,\n        captionServices = options.captionServices;\n\n    if (!src) {\n      throw new Error('A non-empty playlist URL or JSON manifest string is required');\n    }\n\n    var maxPlaylistRetries = options.maxPlaylistRetries;\n\n    if (maxPlaylistRetries === null || typeof maxPlaylistRetries === 'undefined') {\n      maxPlaylistRetries = Infinity;\n    }\n\n    Vhs$1 = externVhs;\n    _this.experimentalBufferBasedABR = Boolean(experimentalBufferBasedABR);\n    _this.experimentalLeastPixelDiffSelector = Boolean(experimentalLeastPixelDiffSelector);\n    _this.withCredentials = withCredentials;\n    _this.tech_ = tech;\n    _this.vhs_ = tech.vhs;\n    _this.sourceType_ = sourceType;\n    _this.useCueTags_ = useCueTags;\n    _this.blacklistDuration = blacklistDuration;\n    _this.maxPlaylistRetries = maxPlaylistRetries;\n    _this.enableLowInitialPlaylist = enableLowInitialPlaylist;\n\n    if (_this.useCueTags_) {\n      _this.cueTagsTrack_ = _this.tech_.addTextTrack('metadata', 'ad-cues');\n      _this.cueTagsTrack_.inBandMetadataTrackDispatchType = '';\n    }\n\n    _this.requestOptions_ = {\n      withCredentials: withCredentials,\n      handleManifestRedirects: handleManifestRedirects,\n      maxPlaylistRetries: maxPlaylistRetries,\n      timeout: null\n    };\n\n    _this.on('error', _this.pauseLoading);\n\n    _this.mediaTypes_ = createMediaTypes();\n    _this.mediaSource = new window$1.MediaSource();\n    _this.handleDurationChange_ = _this.handleDurationChange_.bind(_assertThisInitialized(_this));\n    _this.handleSourceOpen_ = _this.handleSourceOpen_.bind(_assertThisInitialized(_this));\n    _this.handleSourceEnded_ = _this.handleSourceEnded_.bind(_assertThisInitialized(_this));\n\n    _this.mediaSource.addEventListener('durationchange', _this.handleDurationChange_); // load the media source into the player\n\n\n    _this.mediaSource.addEventListener('sourceopen', _this.handleSourceOpen_);\n\n    _this.mediaSource.addEventListener('sourceended', _this.handleSourceEnded_); // we don't have to handle sourceclose since dispose will handle termination of\n    // everything, and the MediaSource should not be detached without a proper disposal\n\n\n    _this.seekable_ = videojs.createTimeRanges();\n    _this.hasPlayed_ = false;\n    _this.syncController_ = new SyncController(options);\n    _this.segmentMetadataTrack_ = tech.addRemoteTextTrack({\n      kind: 'metadata',\n      label: 'segment-metadata'\n    }, false).track;\n    _this.decrypter_ = new Decrypter();\n    _this.sourceUpdater_ = new SourceUpdater(_this.mediaSource);\n    _this.inbandTextTracks_ = {};\n    _this.timelineChangeController_ = new TimelineChangeController();\n    var segmentLoaderSettings = {\n      vhs: _this.vhs_,\n      parse708captions: options.parse708captions,\n      captionServices: captionServices,\n      mediaSource: _this.mediaSource,\n      currentTime: _this.tech_.currentTime.bind(_this.tech_),\n      seekable: function seekable() {\n        return _this.seekable();\n      },\n      seeking: function seeking() {\n        return _this.tech_.seeking();\n      },\n      duration: function duration() {\n        return _this.duration();\n      },\n      hasPlayed: function hasPlayed() {\n        return _this.hasPlayed_;\n      },\n      goalBufferLength: function goalBufferLength() {\n        return _this.goalBufferLength();\n      },\n      bandwidth: bandwidth,\n      syncController: _this.syncController_,\n      decrypter: _this.decrypter_,\n      sourceType: _this.sourceType_,\n      inbandTextTracks: _this.inbandTextTracks_,\n      cacheEncryptionKeys: cacheEncryptionKeys,\n      sourceUpdater: _this.sourceUpdater_,\n      timelineChangeController: _this.timelineChangeController_,\n      experimentalExactManifestTimings: options.experimentalExactManifestTimings\n    }; // The source type check not only determines whether a special DASH playlist loader\n    // should be used, but also covers the case where the provided src is a vhs-json\n    // manifest object (instead of a URL). In the case of vhs-json, the default\n    // PlaylistLoader should be used.\n\n    _this.masterPlaylistLoader_ = _this.sourceType_ === 'dash' ? new DashPlaylistLoader(src, _this.vhs_, _this.requestOptions_) : new PlaylistLoader(src, _this.vhs_, _this.requestOptions_);\n\n    _this.setupMasterPlaylistLoaderListeners_(); // setup segment loaders\n    // combined audio/video or just video when alternate audio track is selected\n\n\n    _this.mainSegmentLoader_ = new SegmentLoader(videojs.mergeOptions(segmentLoaderSettings, {\n      segmentMetadataTrack: _this.segmentMetadataTrack_,\n      loaderType: 'main'\n    }), options); // alternate audio track\n\n    _this.audioSegmentLoader_ = new SegmentLoader(videojs.mergeOptions(segmentLoaderSettings, {\n      loaderType: 'audio'\n    }), options);\n    _this.subtitleSegmentLoader_ = new VTTSegmentLoader(videojs.mergeOptions(segmentLoaderSettings, {\n      loaderType: 'vtt',\n      featuresNativeTextTracks: _this.tech_.featuresNativeTextTracks\n    }), options);\n\n    _this.setupSegmentLoaderListeners_();\n\n    if (_this.experimentalBufferBasedABR) {\n      _this.masterPlaylistLoader_.one('loadedplaylist', function () {\n        return _this.startABRTimer_();\n      });\n\n      _this.tech_.on('pause', function () {\n        return _this.stopABRTimer_();\n      });\n\n      _this.tech_.on('play', function () {\n        return _this.startABRTimer_();\n      });\n    } // Create SegmentLoader stat-getters\n    // mediaRequests_\n    // mediaRequestsAborted_\n    // mediaRequestsTimedout_\n    // mediaRequestsErrored_\n    // mediaTransferDuration_\n    // mediaBytesTransferred_\n    // mediaAppends_\n\n\n    loaderStats.forEach(function (stat) {\n      _this[stat + '_'] = sumLoaderStat.bind(_assertThisInitialized(_this), stat);\n    });\n    _this.logger_ = logger('MPC');\n    _this.triggeredFmp4Usage = false;\n\n    if (_this.tech_.preload() === 'none') {\n      _this.loadOnPlay_ = function () {\n        _this.loadOnPlay_ = null;\n\n        _this.masterPlaylistLoader_.load();\n      };\n\n      _this.tech_.one('play', _this.loadOnPlay_);\n    } else {\n      _this.masterPlaylistLoader_.load();\n    }\n\n    _this.timeToLoadedData__ = -1;\n    _this.mainAppendsToLoadedData__ = -1;\n    _this.audioAppendsToLoadedData__ = -1;\n    var event = _this.tech_.preload() === 'none' ? 'play' : 'loadstart'; // start the first frame timer on loadstart or play (for preload none)\n\n    _this.tech_.one(event, function () {\n      var timeToLoadedDataStart = Date.now();\n\n      _this.tech_.one('loadeddata', function () {\n        _this.timeToLoadedData__ = Date.now() - timeToLoadedDataStart;\n        _this.mainAppendsToLoadedData__ = _this.mainSegmentLoader_.mediaAppends;\n        _this.audioAppendsToLoadedData__ = _this.audioSegmentLoader_.mediaAppends;\n      });\n    });\n\n    return _this;\n  }\n\n  var _proto = MasterPlaylistController.prototype;\n\n  _proto.mainAppendsToLoadedData_ = function mainAppendsToLoadedData_() {\n    return this.mainAppendsToLoadedData__;\n  };\n\n  _proto.audioAppendsToLoadedData_ = function audioAppendsToLoadedData_() {\n    return this.audioAppendsToLoadedData__;\n  };\n\n  _proto.appendsToLoadedData_ = function appendsToLoadedData_() {\n    var main = this.mainAppendsToLoadedData_();\n    var audio = this.audioAppendsToLoadedData_();\n\n    if (main === -1 || audio === -1) {\n      return -1;\n    }\n\n    return main + audio;\n  };\n\n  _proto.timeToLoadedData_ = function timeToLoadedData_() {\n    return this.timeToLoadedData__;\n  }\n  /**\n   * Run selectPlaylist and switch to the new playlist if we should\n   *\n   * @private\n   *\n   */\n  ;\n\n  _proto.checkABR_ = function checkABR_() {\n    var nextPlaylist = this.selectPlaylist();\n\n    if (nextPlaylist && this.shouldSwitchToMedia_(nextPlaylist)) {\n      this.switchMedia_(nextPlaylist, 'abr');\n    }\n  };\n\n  _proto.switchMedia_ = function switchMedia_(playlist, cause, delay) {\n    var oldMedia = this.media();\n    var oldId = oldMedia && (oldMedia.id || oldMedia.uri);\n    var newId = playlist.id || playlist.uri;\n\n    if (oldId && oldId !== newId) {\n      this.logger_(\"switch media \" + oldId + \" -> \" + newId + \" from \" + cause);\n      this.tech_.trigger({\n        type: 'usage',\n        name: \"vhs-rendition-change-\" + cause\n      });\n    }\n\n    this.masterPlaylistLoader_.media(playlist, delay);\n  }\n  /**\n   * Start a timer that periodically calls checkABR_\n   *\n   * @private\n   */\n  ;\n\n  _proto.startABRTimer_ = function startABRTimer_() {\n    var _this2 = this;\n\n    this.stopABRTimer_();\n    this.abrTimer_ = window$1.setInterval(function () {\n      return _this2.checkABR_();\n    }, 250);\n  }\n  /**\n   * Stop the timer that periodically calls checkABR_\n   *\n   * @private\n   */\n  ;\n\n  _proto.stopABRTimer_ = function stopABRTimer_() {\n    // if we're scrubbing, we don't need to pause.\n    // This getter will be added to Video.js in version 7.11.\n    if (this.tech_.scrubbing && this.tech_.scrubbing()) {\n      return;\n    }\n\n    window$1.clearInterval(this.abrTimer_);\n    this.abrTimer_ = null;\n  }\n  /**\n   * Get a list of playlists for the currently selected audio playlist\n   *\n   * @return {Array} the array of audio playlists\n   */\n  ;\n\n  _proto.getAudioTrackPlaylists_ = function getAudioTrackPlaylists_() {\n    var master = this.master();\n    var defaultPlaylists = master && master.playlists || []; // if we don't have any audio groups then we can only\n    // assume that the audio tracks are contained in masters\n    // playlist array, use that or an empty array.\n\n    if (!master || !master.mediaGroups || !master.mediaGroups.AUDIO) {\n      return defaultPlaylists;\n    }\n\n    var AUDIO = master.mediaGroups.AUDIO;\n    var groupKeys = Object.keys(AUDIO);\n    var track; // get the current active track\n\n    if (Object.keys(this.mediaTypes_.AUDIO.groups).length) {\n      track = this.mediaTypes_.AUDIO.activeTrack(); // or get the default track from master if mediaTypes_ isn't setup yet\n    } else {\n      // default group is `main` or just the first group.\n      var defaultGroup = AUDIO.main || groupKeys.length && AUDIO[groupKeys[0]];\n\n      for (var label in defaultGroup) {\n        if (defaultGroup[label][\"default\"]) {\n          track = {\n            label: label\n          };\n          break;\n        }\n      }\n    } // no active track no playlists.\n\n\n    if (!track) {\n      return defaultPlaylists;\n    }\n\n    var playlists = []; // get all of the playlists that are possible for the\n    // active track.\n\n    for (var group in AUDIO) {\n      if (AUDIO[group][track.label]) {\n        var properties = AUDIO[group][track.label];\n\n        if (properties.playlists && properties.playlists.length) {\n          playlists.push.apply(playlists, properties.playlists);\n        } else if (properties.uri) {\n          playlists.push(properties);\n        } else if (master.playlists.length) {\n          // if an audio group does not have a uri\n          // see if we have main playlists that use it as a group.\n          // if we do then add those to the playlists list.\n          for (var i = 0; i < master.playlists.length; i++) {\n            var playlist = master.playlists[i];\n\n            if (playlist.attributes && playlist.attributes.AUDIO && playlist.attributes.AUDIO === group) {\n              playlists.push(playlist);\n            }\n          }\n        }\n      }\n    }\n\n    if (!playlists.length) {\n      return defaultPlaylists;\n    }\n\n    return playlists;\n  }\n  /**\n   * Register event handlers on the master playlist loader. A helper\n   * function for construction time.\n   *\n   * @private\n   */\n  ;\n\n  _proto.setupMasterPlaylistLoaderListeners_ = function setupMasterPlaylistLoaderListeners_() {\n    var _this3 = this;\n\n    this.masterPlaylistLoader_.on('loadedmetadata', function () {\n      var media = _this3.masterPlaylistLoader_.media();\n\n      var requestTimeout = media.targetDuration * 1.5 * 1000; // If we don't have any more available playlists, we don't want to\n      // timeout the request.\n\n      if (isLowestEnabledRendition(_this3.masterPlaylistLoader_.master, _this3.masterPlaylistLoader_.media())) {\n        _this3.requestOptions_.timeout = 0;\n      } else {\n        _this3.requestOptions_.timeout = requestTimeout;\n      } // if this isn't a live video and preload permits, start\n      // downloading segments\n\n\n      if (media.endList && _this3.tech_.preload() !== 'none') {\n        _this3.mainSegmentLoader_.playlist(media, _this3.requestOptions_);\n\n        _this3.mainSegmentLoader_.load();\n      }\n\n      setupMediaGroups({\n        sourceType: _this3.sourceType_,\n        segmentLoaders: {\n          AUDIO: _this3.audioSegmentLoader_,\n          SUBTITLES: _this3.subtitleSegmentLoader_,\n          main: _this3.mainSegmentLoader_\n        },\n        tech: _this3.tech_,\n        requestOptions: _this3.requestOptions_,\n        masterPlaylistLoader: _this3.masterPlaylistLoader_,\n        vhs: _this3.vhs_,\n        master: _this3.master(),\n        mediaTypes: _this3.mediaTypes_,\n        blacklistCurrentPlaylist: _this3.blacklistCurrentPlaylist.bind(_this3)\n      });\n\n      _this3.triggerPresenceUsage_(_this3.master(), media);\n\n      _this3.setupFirstPlay();\n\n      if (!_this3.mediaTypes_.AUDIO.activePlaylistLoader || _this3.mediaTypes_.AUDIO.activePlaylistLoader.media()) {\n        _this3.trigger('selectedinitialmedia');\n      } else {\n        // We must wait for the active audio playlist loader to\n        // finish setting up before triggering this event so the\n        // representations API and EME setup is correct\n        _this3.mediaTypes_.AUDIO.activePlaylistLoader.one('loadedmetadata', function () {\n          _this3.trigger('selectedinitialmedia');\n        });\n      }\n    });\n    this.masterPlaylistLoader_.on('loadedplaylist', function () {\n      if (_this3.loadOnPlay_) {\n        _this3.tech_.off('play', _this3.loadOnPlay_);\n      }\n\n      var updatedPlaylist = _this3.masterPlaylistLoader_.media();\n\n      if (!updatedPlaylist) {\n        // exclude any variants that are not supported by the browser before selecting\n        // an initial media as the playlist selectors do not consider browser support\n        _this3.excludeUnsupportedVariants_();\n\n        var selectedMedia;\n\n        if (_this3.enableLowInitialPlaylist) {\n          selectedMedia = _this3.selectInitialPlaylist();\n        }\n\n        if (!selectedMedia) {\n          selectedMedia = _this3.selectPlaylist();\n        }\n\n        if (!selectedMedia || !_this3.shouldSwitchToMedia_(selectedMedia)) {\n          return;\n        }\n\n        _this3.initialMedia_ = selectedMedia;\n\n        _this3.switchMedia_(_this3.initialMedia_, 'initial'); // Under the standard case where a source URL is provided, loadedplaylist will\n        // fire again since the playlist will be requested. In the case of vhs-json\n        // (where the manifest object is provided as the source), when the media\n        // playlist's `segments` list is already available, a media playlist won't be\n        // requested, and loadedplaylist won't fire again, so the playlist handler must be\n        // called on its own here.\n\n\n        var haveJsonSource = _this3.sourceType_ === 'vhs-json' && _this3.initialMedia_.segments;\n\n        if (!haveJsonSource) {\n          return;\n        }\n\n        updatedPlaylist = _this3.initialMedia_;\n      }\n\n      _this3.handleUpdatedMediaPlaylist(updatedPlaylist);\n    });\n    this.masterPlaylistLoader_.on('error', function () {\n      _this3.blacklistCurrentPlaylist(_this3.masterPlaylistLoader_.error);\n    });\n    this.masterPlaylistLoader_.on('mediachanging', function () {\n      _this3.mainSegmentLoader_.abort();\n\n      _this3.mainSegmentLoader_.pause();\n    });\n    this.masterPlaylistLoader_.on('mediachange', function () {\n      var media = _this3.masterPlaylistLoader_.media();\n\n      var requestTimeout = media.targetDuration * 1.5 * 1000; // If we don't have any more available playlists, we don't want to\n      // timeout the request.\n\n      if (isLowestEnabledRendition(_this3.masterPlaylistLoader_.master, _this3.masterPlaylistLoader_.media())) {\n        _this3.requestOptions_.timeout = 0;\n      } else {\n        _this3.requestOptions_.timeout = requestTimeout;\n      } // TODO: Create a new event on the PlaylistLoader that signals\n      // that the segments have changed in some way and use that to\n      // update the SegmentLoader instead of doing it twice here and\n      // on `loadedplaylist`\n\n\n      _this3.mainSegmentLoader_.playlist(media, _this3.requestOptions_);\n\n      _this3.mainSegmentLoader_.load();\n\n      _this3.tech_.trigger({\n        type: 'mediachange',\n        bubbles: true\n      });\n    });\n    this.masterPlaylistLoader_.on('playlistunchanged', function () {\n      var updatedPlaylist = _this3.masterPlaylistLoader_.media(); // ignore unchanged playlists that have already been\n      // excluded for not-changing. We likely just have a really slowly updating\n      // playlist.\n\n\n      if (updatedPlaylist.lastExcludeReason_ === 'playlist-unchanged') {\n        return;\n      }\n\n      var playlistOutdated = _this3.stuckAtPlaylistEnd_(updatedPlaylist);\n\n      if (playlistOutdated) {\n        // Playlist has stopped updating and we're stuck at its end. Try to\n        // blacklist it and switch to another playlist in the hope that that\n        // one is updating (and give the player a chance to re-adjust to the\n        // safe live point).\n        _this3.blacklistCurrentPlaylist({\n          message: 'Playlist no longer updating.',\n          reason: 'playlist-unchanged'\n        }); // useful for monitoring QoS\n\n\n        _this3.tech_.trigger('playliststuck');\n      }\n    });\n    this.masterPlaylistLoader_.on('renditiondisabled', function () {\n      _this3.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-rendition-disabled'\n      });\n\n      _this3.tech_.trigger({\n        type: 'usage',\n        name: 'hls-rendition-disabled'\n      });\n    });\n    this.masterPlaylistLoader_.on('renditionenabled', function () {\n      _this3.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-rendition-enabled'\n      });\n\n      _this3.tech_.trigger({\n        type: 'usage',\n        name: 'hls-rendition-enabled'\n      });\n    });\n  }\n  /**\n   * Given an updated media playlist (whether it was loaded for the first time, or\n   * refreshed for live playlists), update any relevant properties and state to reflect\n   * changes in the media that should be accounted for (e.g., cues and duration).\n   *\n   * @param {Object} updatedPlaylist the updated media playlist object\n   *\n   * @private\n   */\n  ;\n\n  _proto.handleUpdatedMediaPlaylist = function handleUpdatedMediaPlaylist(updatedPlaylist) {\n    if (this.useCueTags_) {\n      this.updateAdCues_(updatedPlaylist);\n    } // TODO: Create a new event on the PlaylistLoader that signals\n    // that the segments have changed in some way and use that to\n    // update the SegmentLoader instead of doing it twice here and\n    // on `mediachange`\n\n\n    this.mainSegmentLoader_.playlist(updatedPlaylist, this.requestOptions_);\n    this.updateDuration(!updatedPlaylist.endList); // If the player isn't paused, ensure that the segment loader is running,\n    // as it is possible that it was temporarily stopped while waiting for\n    // a playlist (e.g., in case the playlist errored and we re-requested it).\n\n    if (!this.tech_.paused()) {\n      this.mainSegmentLoader_.load();\n\n      if (this.audioSegmentLoader_) {\n        this.audioSegmentLoader_.load();\n      }\n    }\n  }\n  /**\n   * A helper function for triggerring presence usage events once per source\n   *\n   * @private\n   */\n  ;\n\n  _proto.triggerPresenceUsage_ = function triggerPresenceUsage_(master, media) {\n    var mediaGroups = master.mediaGroups || {};\n    var defaultDemuxed = true;\n    var audioGroupKeys = Object.keys(mediaGroups.AUDIO);\n\n    for (var mediaGroup in mediaGroups.AUDIO) {\n      for (var label in mediaGroups.AUDIO[mediaGroup]) {\n        var properties = mediaGroups.AUDIO[mediaGroup][label];\n\n        if (!properties.uri) {\n          defaultDemuxed = false;\n        }\n      }\n    }\n\n    if (defaultDemuxed) {\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-demuxed'\n      });\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'hls-demuxed'\n      });\n    }\n\n    if (Object.keys(mediaGroups.SUBTITLES).length) {\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-webvtt'\n      });\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'hls-webvtt'\n      });\n    }\n\n    if (Vhs$1.Playlist.isAes(media)) {\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-aes'\n      });\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'hls-aes'\n      });\n    }\n\n    if (audioGroupKeys.length && Object.keys(mediaGroups.AUDIO[audioGroupKeys[0]]).length > 1) {\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-alternate-audio'\n      });\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'hls-alternate-audio'\n      });\n    }\n\n    if (this.useCueTags_) {\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-playlist-cue-tags'\n      });\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'hls-playlist-cue-tags'\n      });\n    }\n  };\n\n  _proto.shouldSwitchToMedia_ = function shouldSwitchToMedia_(nextPlaylist) {\n    var currentPlaylist = this.masterPlaylistLoader_.media() || this.masterPlaylistLoader_.pendingMedia_;\n    var currentTime = this.tech_.currentTime();\n    var bufferLowWaterLine = this.bufferLowWaterLine();\n    var bufferHighWaterLine = this.bufferHighWaterLine();\n    var buffered = this.tech_.buffered();\n    return shouldSwitchToMedia({\n      buffered: buffered,\n      currentTime: currentTime,\n      currentPlaylist: currentPlaylist,\n      nextPlaylist: nextPlaylist,\n      bufferLowWaterLine: bufferLowWaterLine,\n      bufferHighWaterLine: bufferHighWaterLine,\n      duration: this.duration(),\n      experimentalBufferBasedABR: this.experimentalBufferBasedABR,\n      log: this.logger_\n    });\n  }\n  /**\n   * Register event handlers on the segment loaders. A helper function\n   * for construction time.\n   *\n   * @private\n   */\n  ;\n\n  _proto.setupSegmentLoaderListeners_ = function setupSegmentLoaderListeners_() {\n    var _this4 = this;\n\n    if (!this.experimentalBufferBasedABR) {\n      this.mainSegmentLoader_.on('bandwidthupdate', function () {\n        var nextPlaylist = _this4.selectPlaylist();\n\n        if (_this4.shouldSwitchToMedia_(nextPlaylist)) {\n          _this4.switchMedia_(nextPlaylist, 'bandwidthupdate');\n        }\n\n        _this4.tech_.trigger('bandwidthupdate');\n      });\n      this.mainSegmentLoader_.on('progress', function () {\n        _this4.trigger('progress');\n      });\n    }\n\n    this.mainSegmentLoader_.on('error', function () {\n      _this4.blacklistCurrentPlaylist(_this4.mainSegmentLoader_.error());\n    });\n    this.mainSegmentLoader_.on('appenderror', function () {\n      _this4.error = _this4.mainSegmentLoader_.error_;\n\n      _this4.trigger('error');\n    });\n    this.mainSegmentLoader_.on('syncinfoupdate', function () {\n      _this4.onSyncInfoUpdate_();\n    });\n    this.mainSegmentLoader_.on('timestampoffset', function () {\n      _this4.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-timestamp-offset'\n      });\n\n      _this4.tech_.trigger({\n        type: 'usage',\n        name: 'hls-timestamp-offset'\n      });\n    });\n    this.audioSegmentLoader_.on('syncinfoupdate', function () {\n      _this4.onSyncInfoUpdate_();\n    });\n    this.audioSegmentLoader_.on('appenderror', function () {\n      _this4.error = _this4.audioSegmentLoader_.error_;\n\n      _this4.trigger('error');\n    });\n    this.mainSegmentLoader_.on('ended', function () {\n      _this4.logger_('main segment loader ended');\n\n      _this4.onEndOfStream();\n    });\n    this.mainSegmentLoader_.on('earlyabort', function (event) {\n      // never try to early abort with the new ABR algorithm\n      if (_this4.experimentalBufferBasedABR) {\n        return;\n      }\n\n      _this4.delegateLoaders_('all', ['abort']);\n\n      _this4.blacklistCurrentPlaylist({\n        message: 'Aborted early because there isn\\'t enough bandwidth to complete the ' + 'request without rebuffering.'\n      }, ABORT_EARLY_BLACKLIST_SECONDS);\n    });\n\n    var updateCodecs = function updateCodecs() {\n      if (!_this4.sourceUpdater_.hasCreatedSourceBuffers()) {\n        return _this4.tryToCreateSourceBuffers_();\n      }\n\n      var codecs = _this4.getCodecsOrExclude_(); // no codecs means that the playlist was excluded\n\n\n      if (!codecs) {\n        return;\n      }\n\n      _this4.sourceUpdater_.addOrChangeSourceBuffers(codecs);\n    };\n\n    this.mainSegmentLoader_.on('trackinfo', updateCodecs);\n    this.audioSegmentLoader_.on('trackinfo', updateCodecs);\n    this.mainSegmentLoader_.on('fmp4', function () {\n      if (!_this4.triggeredFmp4Usage) {\n        _this4.tech_.trigger({\n          type: 'usage',\n          name: 'vhs-fmp4'\n        });\n\n        _this4.tech_.trigger({\n          type: 'usage',\n          name: 'hls-fmp4'\n        });\n\n        _this4.triggeredFmp4Usage = true;\n      }\n    });\n    this.audioSegmentLoader_.on('fmp4', function () {\n      if (!_this4.triggeredFmp4Usage) {\n        _this4.tech_.trigger({\n          type: 'usage',\n          name: 'vhs-fmp4'\n        });\n\n        _this4.tech_.trigger({\n          type: 'usage',\n          name: 'hls-fmp4'\n        });\n\n        _this4.triggeredFmp4Usage = true;\n      }\n    });\n    this.audioSegmentLoader_.on('ended', function () {\n      _this4.logger_('audioSegmentLoader ended');\n\n      _this4.onEndOfStream();\n    });\n  };\n\n  _proto.mediaSecondsLoaded_ = function mediaSecondsLoaded_() {\n    return Math.max(this.audioSegmentLoader_.mediaSecondsLoaded + this.mainSegmentLoader_.mediaSecondsLoaded);\n  }\n  /**\n   * Call load on our SegmentLoaders\n   */\n  ;\n\n  _proto.load = function load() {\n    this.mainSegmentLoader_.load();\n\n    if (this.mediaTypes_.AUDIO.activePlaylistLoader) {\n      this.audioSegmentLoader_.load();\n    }\n\n    if (this.mediaTypes_.SUBTITLES.activePlaylistLoader) {\n      this.subtitleSegmentLoader_.load();\n    }\n  }\n  /**\n   * Re-tune playback quality level for the current player\n   * conditions without performing destructive actions, like\n   * removing already buffered content\n   *\n   * @private\n   * @deprecated\n   */\n  ;\n\n  _proto.smoothQualityChange_ = function smoothQualityChange_(media) {\n    if (media === void 0) {\n      media = this.selectPlaylist();\n    }\n\n    this.fastQualityChange_(media);\n  }\n  /**\n   * Re-tune playback quality level for the current player\n   * conditions. This method will perform destructive actions like removing\n   * already buffered content in order to readjust the currently active\n   * playlist quickly. This is good for manual quality changes\n   *\n   * @private\n   */\n  ;\n\n  _proto.fastQualityChange_ = function fastQualityChange_(media) {\n    var _this5 = this;\n\n    if (media === void 0) {\n      media = this.selectPlaylist();\n    }\n\n    if (media === this.masterPlaylistLoader_.media()) {\n      this.logger_('skipping fastQualityChange because new media is same as old');\n      return;\n    }\n\n    this.switchMedia_(media, 'fast-quality'); // Delete all buffered data to allow an immediate quality switch, then seek to give\n    // the browser a kick to remove any cached frames from the previous rendtion (.04 seconds\n    // ahead is roughly the minimum that will accomplish this across a variety of content\n    // in IE and Edge, but seeking in place is sufficient on all other browsers)\n    // Edge/IE bug: https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/14600375/\n    // Chrome bug: https://bugs.chromium.org/p/chromium/issues/detail?id=651904\n\n    this.mainSegmentLoader_.resetEverything(function () {\n      // Since this is not a typical seek, we avoid the seekTo method which can cause segments\n      // from the previously enabled rendition to load before the new playlist has finished loading\n      if (videojs.browser.IE_VERSION || videojs.browser.IS_EDGE) {\n        _this5.tech_.setCurrentTime(_this5.tech_.currentTime() + 0.04);\n      } else {\n        _this5.tech_.setCurrentTime(_this5.tech_.currentTime());\n      }\n    }); // don't need to reset audio as it is reset when media changes\n  }\n  /**\n   * Begin playback.\n   */\n  ;\n\n  _proto.play = function play() {\n    if (this.setupFirstPlay()) {\n      return;\n    }\n\n    if (this.tech_.ended()) {\n      this.tech_.setCurrentTime(0);\n    }\n\n    if (this.hasPlayed_) {\n      this.load();\n    }\n\n    var seekable = this.tech_.seekable(); // if the viewer has paused and we fell out of the live window,\n    // seek forward to the live point\n\n    if (this.tech_.duration() === Infinity) {\n      if (this.tech_.currentTime() < seekable.start(0)) {\n        return this.tech_.setCurrentTime(seekable.end(seekable.length - 1));\n      }\n    }\n  }\n  /**\n   * Seek to the latest media position if this is a live video and the\n   * player and video are loaded and initialized.\n   */\n  ;\n\n  _proto.setupFirstPlay = function setupFirstPlay() {\n    var _this6 = this;\n\n    var media = this.masterPlaylistLoader_.media(); // Check that everything is ready to begin buffering for the first call to play\n    //  If 1) there is no active media\n    //     2) the player is paused\n    //     3) the first play has already been setup\n    // then exit early\n\n    if (!media || this.tech_.paused() || this.hasPlayed_) {\n      return false;\n    } // when the video is a live stream\n\n\n    if (!media.endList) {\n      var seekable = this.seekable();\n\n      if (!seekable.length) {\n        // without a seekable range, the player cannot seek to begin buffering at the live\n        // point\n        return false;\n      }\n\n      if (videojs.browser.IE_VERSION && this.tech_.readyState() === 0) {\n        // IE11 throws an InvalidStateError if you try to set currentTime while the\n        // readyState is 0, so it must be delayed until the tech fires loadedmetadata.\n        this.tech_.one('loadedmetadata', function () {\n          _this6.trigger('firstplay');\n\n          _this6.tech_.setCurrentTime(seekable.end(0));\n\n          _this6.hasPlayed_ = true;\n        });\n        return false;\n      } // trigger firstplay to inform the source handler to ignore the next seek event\n\n\n      this.trigger('firstplay'); // seek to the live point\n\n      this.tech_.setCurrentTime(seekable.end(0));\n    }\n\n    this.hasPlayed_ = true; // we can begin loading now that everything is ready\n\n    this.load();\n    return true;\n  }\n  /**\n   * handle the sourceopen event on the MediaSource\n   *\n   * @private\n   */\n  ;\n\n  _proto.handleSourceOpen_ = function handleSourceOpen_() {\n    // Only attempt to create the source buffer if none already exist.\n    // handleSourceOpen is also called when we are \"re-opening\" a source buffer\n    // after `endOfStream` has been called (in response to a seek for instance)\n    this.tryToCreateSourceBuffers_(); // if autoplay is enabled, begin playback. This is duplicative of\n    // code in video.js but is required because play() must be invoked\n    // *after* the media source has opened.\n\n    if (this.tech_.autoplay()) {\n      var playPromise = this.tech_.play(); // Catch/silence error when a pause interrupts a play request\n      // on browsers which return a promise\n\n      if (typeof playPromise !== 'undefined' && typeof playPromise.then === 'function') {\n        playPromise.then(null, function (e) {});\n      }\n    }\n\n    this.trigger('sourceopen');\n  }\n  /**\n   * handle the sourceended event on the MediaSource\n   *\n   * @private\n   */\n  ;\n\n  _proto.handleSourceEnded_ = function handleSourceEnded_() {\n    if (!this.inbandTextTracks_.metadataTrack_) {\n      return;\n    }\n\n    var cues = this.inbandTextTracks_.metadataTrack_.cues;\n\n    if (!cues || !cues.length) {\n      return;\n    }\n\n    var duration = this.duration();\n    cues[cues.length - 1].endTime = isNaN(duration) || Math.abs(duration) === Infinity ? Number.MAX_VALUE : duration;\n  }\n  /**\n   * handle the durationchange event on the MediaSource\n   *\n   * @private\n   */\n  ;\n\n  _proto.handleDurationChange_ = function handleDurationChange_() {\n    this.tech_.trigger('durationchange');\n  }\n  /**\n   * Calls endOfStream on the media source when all active stream types have called\n   * endOfStream\n   *\n   * @param {string} streamType\n   *        Stream type of the segment loader that called endOfStream\n   * @private\n   */\n  ;\n\n  _proto.onEndOfStream = function onEndOfStream() {\n    var isEndOfStream = this.mainSegmentLoader_.ended_;\n\n    if (this.mediaTypes_.AUDIO.activePlaylistLoader) {\n      var mainMediaInfo = this.mainSegmentLoader_.getCurrentMediaInfo_(); // if the audio playlist loader exists, then alternate audio is active\n\n      if (!mainMediaInfo || mainMediaInfo.hasVideo) {\n        // if we do not know if the main segment loader contains video yet or if we\n        // definitively know the main segment loader contains video, then we need to wait\n        // for both main and audio segment loaders to call endOfStream\n        isEndOfStream = isEndOfStream && this.audioSegmentLoader_.ended_;\n      } else {\n        // otherwise just rely on the audio loader\n        isEndOfStream = this.audioSegmentLoader_.ended_;\n      }\n    }\n\n    if (!isEndOfStream) {\n      return;\n    }\n\n    this.stopABRTimer_();\n    this.sourceUpdater_.endOfStream();\n  }\n  /**\n   * Check if a playlist has stopped being updated\n   *\n   * @param {Object} playlist the media playlist object\n   * @return {boolean} whether the playlist has stopped being updated or not\n   */\n  ;\n\n  _proto.stuckAtPlaylistEnd_ = function stuckAtPlaylistEnd_(playlist) {\n    var seekable = this.seekable();\n\n    if (!seekable.length) {\n      // playlist doesn't have enough information to determine whether we are stuck\n      return false;\n    }\n\n    var expired = this.syncController_.getExpiredTime(playlist, this.duration());\n\n    if (expired === null) {\n      return false;\n    } // does not use the safe live end to calculate playlist end, since we\n    // don't want to say we are stuck while there is still content\n\n\n    var absolutePlaylistEnd = Vhs$1.Playlist.playlistEnd(playlist, expired);\n    var currentTime = this.tech_.currentTime();\n    var buffered = this.tech_.buffered();\n\n    if (!buffered.length) {\n      // return true if the playhead reached the absolute end of the playlist\n      return absolutePlaylistEnd - currentTime <= SAFE_TIME_DELTA;\n    }\n\n    var bufferedEnd = buffered.end(buffered.length - 1); // return true if there is too little buffer left and buffer has reached absolute\n    // end of playlist\n\n    return bufferedEnd - currentTime <= SAFE_TIME_DELTA && absolutePlaylistEnd - bufferedEnd <= SAFE_TIME_DELTA;\n  }\n  /**\n   * Blacklists a playlist when an error occurs for a set amount of time\n   * making it unavailable for selection by the rendition selection algorithm\n   * and then forces a new playlist (rendition) selection.\n   *\n   * @param {Object=} error an optional error that may include the playlist\n   * to blacklist\n   * @param {number=} blacklistDuration an optional number of seconds to blacklist the\n   * playlist\n   */\n  ;\n\n  _proto.blacklistCurrentPlaylist = function blacklistCurrentPlaylist(error, blacklistDuration) {\n    if (error === void 0) {\n      error = {};\n    } // If the `error` was generated by the playlist loader, it will contain\n    // the playlist we were trying to load (but failed) and that should be\n    // blacklisted instead of the currently selected playlist which is likely\n    // out-of-date in this scenario\n\n\n    var currentPlaylist = error.playlist || this.masterPlaylistLoader_.media();\n    blacklistDuration = blacklistDuration || error.blacklistDuration || this.blacklistDuration; // If there is no current playlist, then an error occurred while we were\n    // trying to load the master OR while we were disposing of the tech\n\n    if (!currentPlaylist) {\n      this.error = error;\n\n      if (this.mediaSource.readyState !== 'open') {\n        this.trigger('error');\n      } else {\n        this.sourceUpdater_.endOfStream('network');\n      }\n\n      return;\n    }\n\n    currentPlaylist.playlistErrors_++;\n    var playlists = this.masterPlaylistLoader_.master.playlists;\n    var enabledPlaylists = playlists.filter(isEnabled);\n    var isFinalRendition = enabledPlaylists.length === 1 && enabledPlaylists[0] === currentPlaylist; // Don't blacklist the only playlist unless it was blacklisted\n    // forever\n\n    if (playlists.length === 1 && blacklistDuration !== Infinity) {\n      videojs.log.warn(\"Problem encountered with playlist \" + currentPlaylist.id + \". \" + 'Trying again since it is the only playlist.');\n      this.tech_.trigger('retryplaylist'); // if this is a final rendition, we should delay\n\n      return this.masterPlaylistLoader_.load(isFinalRendition);\n    }\n\n    if (isFinalRendition) {\n      // Since we're on the final non-blacklisted playlist, and we're about to blacklist\n      // it, instead of erring the player or retrying this playlist, clear out the current\n      // blacklist. This allows other playlists to be attempted in case any have been\n      // fixed.\n      var reincluded = false;\n      playlists.forEach(function (playlist) {\n        // skip current playlist which is about to be blacklisted\n        if (playlist === currentPlaylist) {\n          return;\n        }\n\n        var excludeUntil = playlist.excludeUntil; // a playlist cannot be reincluded if it wasn't excluded to begin with.\n\n        if (typeof excludeUntil !== 'undefined' && excludeUntil !== Infinity) {\n          reincluded = true;\n          delete playlist.excludeUntil;\n        }\n      });\n\n      if (reincluded) {\n        videojs.log.warn('Removing other playlists from the exclusion list because the last ' + 'rendition is about to be excluded.'); // Technically we are retrying a playlist, in that we are simply retrying a previous\n        // playlist. This is needed for users relying on the retryplaylist event to catch a\n        // case where the player might be stuck and looping through \"dead\" playlists.\n\n        this.tech_.trigger('retryplaylist');\n      }\n    } // Blacklist this playlist\n\n\n    var excludeUntil;\n\n    if (currentPlaylist.playlistErrors_ > this.maxPlaylistRetries) {\n      excludeUntil = Infinity;\n    } else {\n      excludeUntil = Date.now() + blacklistDuration * 1000;\n    }\n\n    currentPlaylist.excludeUntil = excludeUntil;\n\n    if (error.reason) {\n      currentPlaylist.lastExcludeReason_ = error.reason;\n    }\n\n    this.tech_.trigger('blacklistplaylist');\n    this.tech_.trigger({\n      type: 'usage',\n      name: 'vhs-rendition-blacklisted'\n    });\n    this.tech_.trigger({\n      type: 'usage',\n      name: 'hls-rendition-blacklisted'\n    }); // TODO: should we select a new playlist if this blacklist wasn't for the currentPlaylist?\n    // Would be something like media().id !=== currentPlaylist.id and we  would need something\n    // like `pendingMedia` in playlist loaders to check against that too. This will prevent us\n    // from loading a new playlist on any blacklist.\n    // Select a new playlist\n\n    var nextPlaylist = this.selectPlaylist();\n\n    if (!nextPlaylist) {\n      this.error = 'Playback cannot continue. No available working or supported playlists.';\n      this.trigger('error');\n      return;\n    }\n\n    var logFn = error.internal ? this.logger_ : videojs.log.warn;\n    var errorMessage = error.message ? ' ' + error.message : '';\n    logFn((error.internal ? 'Internal problem' : 'Problem') + \" encountered with playlist \" + currentPlaylist.id + \".\" + (errorMessage + \" Switching to playlist \" + nextPlaylist.id + \".\")); // if audio group changed reset audio loaders\n\n    if (nextPlaylist.attributes.AUDIO !== currentPlaylist.attributes.AUDIO) {\n      this.delegateLoaders_('audio', ['abort', 'pause']);\n    } // if subtitle group changed reset subtitle loaders\n\n\n    if (nextPlaylist.attributes.SUBTITLES !== currentPlaylist.attributes.SUBTITLES) {\n      this.delegateLoaders_('subtitle', ['abort', 'pause']);\n    }\n\n    this.delegateLoaders_('main', ['abort', 'pause']);\n    var delayDuration = nextPlaylist.targetDuration / 2 * 1000 || 5 * 1000;\n    var shouldDelay = typeof nextPlaylist.lastRequest === 'number' && Date.now() - nextPlaylist.lastRequest <= delayDuration; // delay if it's a final rendition or if the last refresh is sooner than half targetDuration\n\n    return this.switchMedia_(nextPlaylist, 'exclude', isFinalRendition || shouldDelay);\n  }\n  /**\n   * Pause all segment/playlist loaders\n   */\n  ;\n\n  _proto.pauseLoading = function pauseLoading() {\n    this.delegateLoaders_('all', ['abort', 'pause']);\n    this.stopABRTimer_();\n  }\n  /**\n   * Call a set of functions in order on playlist loaders, segment loaders,\n   * or both types of loaders.\n   *\n   * @param {string} filter\n   *        Filter loaders that should call fnNames using a string. Can be:\n   *        * all - run on all loaders\n   *        * audio - run on all audio loaders\n   *        * subtitle - run on all subtitle loaders\n   *        * main - run on the main/master loaders\n   *\n   * @param {Array|string} fnNames\n   *        A string or array of function names to call.\n   */\n  ;\n\n  _proto.delegateLoaders_ = function delegateLoaders_(filter, fnNames) {\n    var _this7 = this;\n\n    var loaders = [];\n    var dontFilterPlaylist = filter === 'all';\n\n    if (dontFilterPlaylist || filter === 'main') {\n      loaders.push(this.masterPlaylistLoader_);\n    }\n\n    var mediaTypes = [];\n\n    if (dontFilterPlaylist || filter === 'audio') {\n      mediaTypes.push('AUDIO');\n    }\n\n    if (dontFilterPlaylist || filter === 'subtitle') {\n      mediaTypes.push('CLOSED-CAPTIONS');\n      mediaTypes.push('SUBTITLES');\n    }\n\n    mediaTypes.forEach(function (mediaType) {\n      var loader = _this7.mediaTypes_[mediaType] && _this7.mediaTypes_[mediaType].activePlaylistLoader;\n\n      if (loader) {\n        loaders.push(loader);\n      }\n    });\n    ['main', 'audio', 'subtitle'].forEach(function (name) {\n      var loader = _this7[name + \"SegmentLoader_\"];\n\n      if (loader && (filter === name || filter === 'all')) {\n        loaders.push(loader);\n      }\n    });\n    loaders.forEach(function (loader) {\n      return fnNames.forEach(function (fnName) {\n        if (typeof loader[fnName] === 'function') {\n          loader[fnName]();\n        }\n      });\n    });\n  }\n  /**\n   * set the current time on all segment loaders\n   *\n   * @param {TimeRange} currentTime the current time to set\n   * @return {TimeRange} the current time\n   */\n  ;\n\n  _proto.setCurrentTime = function setCurrentTime(currentTime) {\n    var buffered = findRange(this.tech_.buffered(), currentTime);\n\n    if (!(this.masterPlaylistLoader_ && this.masterPlaylistLoader_.media())) {\n      // return immediately if the metadata is not ready yet\n      return 0;\n    } // it's clearly an edge-case but don't thrown an error if asked to\n    // seek within an empty playlist\n\n\n    if (!this.masterPlaylistLoader_.media().segments) {\n      return 0;\n    } // if the seek location is already buffered, continue buffering as usual\n\n\n    if (buffered && buffered.length) {\n      return currentTime;\n    } // cancel outstanding requests so we begin buffering at the new\n    // location\n\n\n    this.mainSegmentLoader_.resetEverything();\n    this.mainSegmentLoader_.abort();\n\n    if (this.mediaTypes_.AUDIO.activePlaylistLoader) {\n      this.audioSegmentLoader_.resetEverything();\n      this.audioSegmentLoader_.abort();\n    }\n\n    if (this.mediaTypes_.SUBTITLES.activePlaylistLoader) {\n      this.subtitleSegmentLoader_.resetEverything();\n      this.subtitleSegmentLoader_.abort();\n    } // start segment loader loading in case they are paused\n\n\n    this.load();\n  }\n  /**\n   * get the current duration\n   *\n   * @return {TimeRange} the duration\n   */\n  ;\n\n  _proto.duration = function duration() {\n    if (!this.masterPlaylistLoader_) {\n      return 0;\n    }\n\n    var media = this.masterPlaylistLoader_.media();\n\n    if (!media) {\n      // no playlists loaded yet, so can't determine a duration\n      return 0;\n    } // Don't rely on the media source for duration in the case of a live playlist since\n    // setting the native MediaSource's duration to infinity ends up with consequences to\n    // seekable behavior. See https://github.com/w3c/media-source/issues/5 for details.\n    //\n    // This is resolved in the spec by https://github.com/w3c/media-source/pull/92,\n    // however, few browsers have support for setLiveSeekableRange()\n    // https://developer.mozilla.org/en-US/docs/Web/API/MediaSource/setLiveSeekableRange\n    //\n    // Until a time when the duration of the media source can be set to infinity, and a\n    // seekable range specified across browsers, just return Infinity.\n\n\n    if (!media.endList) {\n      return Infinity;\n    } // Since this is a VOD video, it is safe to rely on the media source's duration (if\n    // available). If it's not available, fall back to a playlist-calculated estimate.\n\n\n    if (this.mediaSource) {\n      return this.mediaSource.duration;\n    }\n\n    return Vhs$1.Playlist.duration(media);\n  }\n  /**\n   * check the seekable range\n   *\n   * @return {TimeRange} the seekable range\n   */\n  ;\n\n  _proto.seekable = function seekable() {\n    return this.seekable_;\n  };\n\n  _proto.onSyncInfoUpdate_ = function onSyncInfoUpdate_() {\n    var audioSeekable; // TODO check for creation of both source buffers before updating seekable\n    //\n    // A fix was made to this function where a check for\n    // this.sourceUpdater_.hasCreatedSourceBuffers\n    // was added to ensure that both source buffers were created before seekable was\n    // updated. However, it originally had a bug where it was checking for a true and\n    // returning early instead of checking for false. Setting it to check for false to\n    // return early though created other issues. A call to play() would check for seekable\n    // end without verifying that a seekable range was present. In addition, even checking\n    // for that didn't solve some issues, as handleFirstPlay is sometimes worked around\n    // due to a media update calling load on the segment loaders, skipping a seek to live,\n    // thereby starting live streams at the beginning of the stream rather than at the end.\n    //\n    // This conditional should be fixed to wait for the creation of two source buffers at\n    // the same time as the other sections of code are fixed to properly seek to live and\n    // not throw an error due to checking for a seekable end when no seekable range exists.\n    //\n    // For now, fall back to the older behavior, with the understanding that the seekable\n    // range may not be completely correct, leading to a suboptimal initial live point.\n\n    if (!this.masterPlaylistLoader_) {\n      return;\n    }\n\n    var media = this.masterPlaylistLoader_.media();\n\n    if (!media) {\n      return;\n    }\n\n    var expired = this.syncController_.getExpiredTime(media, this.duration());\n\n    if (expired === null) {\n      // not enough information to update seekable\n      return;\n    }\n\n    var master = this.masterPlaylistLoader_.master;\n    var mainSeekable = Vhs$1.Playlist.seekable(media, expired, Vhs$1.Playlist.liveEdgeDelay(master, media));\n\n    if (mainSeekable.length === 0) {\n      return;\n    }\n\n    if (this.mediaTypes_.AUDIO.activePlaylistLoader) {\n      media = this.mediaTypes_.AUDIO.activePlaylistLoader.media();\n      expired = this.syncController_.getExpiredTime(media, this.duration());\n\n      if (expired === null) {\n        return;\n      }\n\n      audioSeekable = Vhs$1.Playlist.seekable(media, expired, Vhs$1.Playlist.liveEdgeDelay(master, media));\n\n      if (audioSeekable.length === 0) {\n        return;\n      }\n    }\n\n    var oldEnd;\n    var oldStart;\n\n    if (this.seekable_ && this.seekable_.length) {\n      oldEnd = this.seekable_.end(0);\n      oldStart = this.seekable_.start(0);\n    }\n\n    if (!audioSeekable) {\n      // seekable has been calculated based on buffering video data so it\n      // can be returned directly\n      this.seekable_ = mainSeekable;\n    } else if (audioSeekable.start(0) > mainSeekable.end(0) || mainSeekable.start(0) > audioSeekable.end(0)) {\n      // seekables are pretty far off, rely on main\n      this.seekable_ = mainSeekable;\n    } else {\n      this.seekable_ = videojs.createTimeRanges([[audioSeekable.start(0) > mainSeekable.start(0) ? audioSeekable.start(0) : mainSeekable.start(0), audioSeekable.end(0) < mainSeekable.end(0) ? audioSeekable.end(0) : mainSeekable.end(0)]]);\n    } // seekable is the same as last time\n\n\n    if (this.seekable_ && this.seekable_.length) {\n      if (this.seekable_.end(0) === oldEnd && this.seekable_.start(0) === oldStart) {\n        return;\n      }\n    }\n\n    this.logger_(\"seekable updated [\" + printableRange(this.seekable_) + \"]\");\n    this.tech_.trigger('seekablechanged');\n  }\n  /**\n   * Update the player duration\n   */\n  ;\n\n  _proto.updateDuration = function updateDuration(isLive) {\n    if (this.updateDuration_) {\n      this.mediaSource.removeEventListener('sourceopen', this.updateDuration_);\n      this.updateDuration_ = null;\n    }\n\n    if (this.mediaSource.readyState !== 'open') {\n      this.updateDuration_ = this.updateDuration.bind(this, isLive);\n      this.mediaSource.addEventListener('sourceopen', this.updateDuration_);\n      return;\n    }\n\n    if (isLive) {\n      var seekable = this.seekable();\n\n      if (!seekable.length) {\n        return;\n      } // Even in the case of a live playlist, the native MediaSource's duration should not\n      // be set to Infinity (even though this would be expected for a live playlist), since\n      // setting the native MediaSource's duration to infinity ends up with consequences to\n      // seekable behavior. See https://github.com/w3c/media-source/issues/5 for details.\n      //\n      // This is resolved in the spec by https://github.com/w3c/media-source/pull/92,\n      // however, few browsers have support for setLiveSeekableRange()\n      // https://developer.mozilla.org/en-US/docs/Web/API/MediaSource/setLiveSeekableRange\n      //\n      // Until a time when the duration of the media source can be set to infinity, and a\n      // seekable range specified across browsers, the duration should be greater than or\n      // equal to the last possible seekable value.\n      // MediaSource duration starts as NaN\n      // It is possible (and probable) that this case will never be reached for many\n      // sources, since the MediaSource reports duration as the highest value without\n      // accounting for timestamp offset. For example, if the timestamp offset is -100 and\n      // we buffered times 0 to 100 with real times of 100 to 200, even though current\n      // time will be between 0 and 100, the native media source may report the duration\n      // as 200. However, since we report duration separate from the media source (as\n      // Infinity), and as long as the native media source duration value is greater than\n      // our reported seekable range, seeks will work as expected. The large number as\n      // duration for live is actually a strategy used by some players to work around the\n      // issue of live seekable ranges cited above.\n\n\n      if (isNaN(this.mediaSource.duration) || this.mediaSource.duration < seekable.end(seekable.length - 1)) {\n        this.sourceUpdater_.setDuration(seekable.end(seekable.length - 1));\n      }\n\n      return;\n    }\n\n    var buffered = this.tech_.buffered();\n    var duration = Vhs$1.Playlist.duration(this.masterPlaylistLoader_.media());\n\n    if (buffered.length > 0) {\n      duration = Math.max(duration, buffered.end(buffered.length - 1));\n    }\n\n    if (this.mediaSource.duration !== duration) {\n      this.sourceUpdater_.setDuration(duration);\n    }\n  }\n  /**\n   * dispose of the MasterPlaylistController and everything\n   * that it controls\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    var _this8 = this;\n\n    this.trigger('dispose');\n    this.decrypter_.terminate();\n    this.masterPlaylistLoader_.dispose();\n    this.mainSegmentLoader_.dispose();\n\n    if (this.loadOnPlay_) {\n      this.tech_.off('play', this.loadOnPlay_);\n    }\n\n    ['AUDIO', 'SUBTITLES'].forEach(function (type) {\n      var groups = _this8.mediaTypes_[type].groups;\n\n      for (var id in groups) {\n        groups[id].forEach(function (group) {\n          if (group.playlistLoader) {\n            group.playlistLoader.dispose();\n          }\n        });\n      }\n    });\n    this.audioSegmentLoader_.dispose();\n    this.subtitleSegmentLoader_.dispose();\n    this.sourceUpdater_.dispose();\n    this.timelineChangeController_.dispose();\n    this.stopABRTimer_();\n\n    if (this.updateDuration_) {\n      this.mediaSource.removeEventListener('sourceopen', this.updateDuration_);\n    }\n\n    this.mediaSource.removeEventListener('durationchange', this.handleDurationChange_); // load the media source into the player\n\n    this.mediaSource.removeEventListener('sourceopen', this.handleSourceOpen_);\n    this.mediaSource.removeEventListener('sourceended', this.handleSourceEnded_);\n    this.off();\n  }\n  /**\n   * return the master playlist object if we have one\n   *\n   * @return {Object} the master playlist object that we parsed\n   */\n  ;\n\n  _proto.master = function master() {\n    return this.masterPlaylistLoader_.master;\n  }\n  /**\n   * return the currently selected playlist\n   *\n   * @return {Object} the currently selected playlist object that we parsed\n   */\n  ;\n\n  _proto.media = function media() {\n    // playlist loader will not return media if it has not been fully loaded\n    return this.masterPlaylistLoader_.media() || this.initialMedia_;\n  };\n\n  _proto.areMediaTypesKnown_ = function areMediaTypesKnown_() {\n    var usingAudioLoader = !!this.mediaTypes_.AUDIO.activePlaylistLoader;\n    var hasMainMediaInfo = !!this.mainSegmentLoader_.getCurrentMediaInfo_(); // if we are not using an audio loader, then we have audio media info\n    // otherwise check on the segment loader.\n\n    var hasAudioMediaInfo = !usingAudioLoader ? true : !!this.audioSegmentLoader_.getCurrentMediaInfo_(); // one or both loaders has not loaded sufficently to get codecs\n\n    if (!hasMainMediaInfo || !hasAudioMediaInfo) {\n      return false;\n    }\n\n    return true;\n  };\n\n  _proto.getCodecsOrExclude_ = function getCodecsOrExclude_() {\n    var _this9 = this;\n\n    var media = {\n      main: this.mainSegmentLoader_.getCurrentMediaInfo_() || {},\n      audio: this.audioSegmentLoader_.getCurrentMediaInfo_() || {}\n    }; // set \"main\" media equal to video\n\n    media.video = media.main;\n    var playlistCodecs = codecsForPlaylist(this.master(), this.media());\n    var codecs = {};\n    var usingAudioLoader = !!this.mediaTypes_.AUDIO.activePlaylistLoader;\n\n    if (media.main.hasVideo) {\n      codecs.video = playlistCodecs.video || media.main.videoCodec || DEFAULT_VIDEO_CODEC;\n    }\n\n    if (media.main.isMuxed) {\n      codecs.video += \",\" + (playlistCodecs.audio || media.main.audioCodec || DEFAULT_AUDIO_CODEC);\n    }\n\n    if (media.main.hasAudio && !media.main.isMuxed || media.audio.hasAudio || usingAudioLoader) {\n      codecs.audio = playlistCodecs.audio || media.main.audioCodec || media.audio.audioCodec || DEFAULT_AUDIO_CODEC; // set audio isFmp4 so we use the correct \"supports\" function below\n\n      media.audio.isFmp4 = media.main.hasAudio && !media.main.isMuxed ? media.main.isFmp4 : media.audio.isFmp4;\n    } // no codecs, no playback.\n\n\n    if (!codecs.audio && !codecs.video) {\n      this.blacklistCurrentPlaylist({\n        playlist: this.media(),\n        message: 'Could not determine codecs for playlist.',\n        blacklistDuration: Infinity\n      });\n      return;\n    } // fmp4 relies on browser support, while ts relies on muxer support\n\n\n    var supportFunction = function supportFunction(isFmp4, codec) {\n      return isFmp4 ? browserSupportsCodec(codec) : muxerSupportsCodec(codec);\n    };\n\n    var unsupportedCodecs = {};\n    var unsupportedAudio;\n    ['video', 'audio'].forEach(function (type) {\n      if (codecs.hasOwnProperty(type) && !supportFunction(media[type].isFmp4, codecs[type])) {\n        var supporter = media[type].isFmp4 ? 'browser' : 'muxer';\n        unsupportedCodecs[supporter] = unsupportedCodecs[supporter] || [];\n        unsupportedCodecs[supporter].push(codecs[type]);\n\n        if (type === 'audio') {\n          unsupportedAudio = supporter;\n        }\n      }\n    });\n\n    if (usingAudioLoader && unsupportedAudio && this.media().attributes.AUDIO) {\n      var audioGroup = this.media().attributes.AUDIO;\n      this.master().playlists.forEach(function (variant) {\n        var variantAudioGroup = variant.attributes && variant.attributes.AUDIO;\n\n        if (variantAudioGroup === audioGroup && variant !== _this9.media()) {\n          variant.excludeUntil = Infinity;\n        }\n      });\n      this.logger_(\"excluding audio group \" + audioGroup + \" as \" + unsupportedAudio + \" does not support codec(s): \\\"\" + codecs.audio + \"\\\"\");\n    } // if we have any unsupported codecs blacklist this playlist.\n\n\n    if (Object.keys(unsupportedCodecs).length) {\n      var message = Object.keys(unsupportedCodecs).reduce(function (acc, supporter) {\n        if (acc) {\n          acc += ', ';\n        }\n\n        acc += supporter + \" does not support codec(s): \\\"\" + unsupportedCodecs[supporter].join(',') + \"\\\"\";\n        return acc;\n      }, '') + '.';\n      this.blacklistCurrentPlaylist({\n        playlist: this.media(),\n        internal: true,\n        message: message,\n        blacklistDuration: Infinity\n      });\n      return;\n    } // check if codec switching is happening\n\n\n    if (this.sourceUpdater_.hasCreatedSourceBuffers() && !this.sourceUpdater_.canChangeType()) {\n      var switchMessages = [];\n      ['video', 'audio'].forEach(function (type) {\n        var newCodec = (parseCodecs(_this9.sourceUpdater_.codecs[type] || '')[0] || {}).type;\n        var oldCodec = (parseCodecs(codecs[type] || '')[0] || {}).type;\n\n        if (newCodec && oldCodec && newCodec.toLowerCase() !== oldCodec.toLowerCase()) {\n          switchMessages.push(\"\\\"\" + _this9.sourceUpdater_.codecs[type] + \"\\\" -> \\\"\" + codecs[type] + \"\\\"\");\n        }\n      });\n\n      if (switchMessages.length) {\n        this.blacklistCurrentPlaylist({\n          playlist: this.media(),\n          message: \"Codec switching not supported: \" + switchMessages.join(', ') + \".\",\n          blacklistDuration: Infinity,\n          internal: true\n        });\n        return;\n      }\n    } // TODO: when using the muxer shouldn't we just return\n    // the codecs that the muxer outputs?\n\n\n    return codecs;\n  }\n  /**\n   * Create source buffers and exlude any incompatible renditions.\n   *\n   * @private\n   */\n  ;\n\n  _proto.tryToCreateSourceBuffers_ = function tryToCreateSourceBuffers_() {\n    // media source is not ready yet or sourceBuffers are already\n    // created.\n    if (this.mediaSource.readyState !== 'open' || this.sourceUpdater_.hasCreatedSourceBuffers()) {\n      return;\n    }\n\n    if (!this.areMediaTypesKnown_()) {\n      return;\n    }\n\n    var codecs = this.getCodecsOrExclude_(); // no codecs means that the playlist was excluded\n\n    if (!codecs) {\n      return;\n    }\n\n    this.sourceUpdater_.createSourceBuffers(codecs);\n    var codecString = [codecs.video, codecs.audio].filter(Boolean).join(',');\n    this.excludeIncompatibleVariants_(codecString);\n  }\n  /**\n   * Excludes playlists with codecs that are unsupported by the muxer and browser.\n   */\n  ;\n\n  _proto.excludeUnsupportedVariants_ = function excludeUnsupportedVariants_() {\n    var _this10 = this;\n\n    var playlists = this.master().playlists;\n    var ids = []; // TODO: why don't we have a property to loop through all\n    // playlist? Why did we ever mix indexes and keys?\n\n    Object.keys(playlists).forEach(function (key) {\n      var variant = playlists[key]; // check if we already processed this playlist.\n\n      if (ids.indexOf(variant.id) !== -1) {\n        return;\n      }\n\n      ids.push(variant.id);\n      var codecs = codecsForPlaylist(_this10.master, variant);\n      var unsupported = [];\n\n      if (codecs.audio && !muxerSupportsCodec(codecs.audio) && !browserSupportsCodec(codecs.audio)) {\n        unsupported.push(\"audio codec \" + codecs.audio);\n      }\n\n      if (codecs.video && !muxerSupportsCodec(codecs.video) && !browserSupportsCodec(codecs.video)) {\n        unsupported.push(\"video codec \" + codecs.video);\n      }\n\n      if (codecs.text && codecs.text === 'stpp.ttml.im1t') {\n        unsupported.push(\"text codec \" + codecs.text);\n      }\n\n      if (unsupported.length) {\n        variant.excludeUntil = Infinity;\n\n        _this10.logger_(\"excluding \" + variant.id + \" for unsupported: \" + unsupported.join(', '));\n      }\n    });\n  }\n  /**\n   * Blacklist playlists that are known to be codec or\n   * stream-incompatible with the SourceBuffer configuration. For\n   * instance, Media Source Extensions would cause the video element to\n   * stall waiting for video data if you switched from a variant with\n   * video and audio to an audio-only one.\n   *\n   * @param {Object} media a media playlist compatible with the current\n   * set of SourceBuffers. Variants in the current master playlist that\n   * do not appear to have compatible codec or stream configurations\n   * will be excluded from the default playlist selection algorithm\n   * indefinitely.\n   * @private\n   */\n  ;\n\n  _proto.excludeIncompatibleVariants_ = function excludeIncompatibleVariants_(codecString) {\n    var _this11 = this;\n\n    var ids = [];\n    var playlists = this.master().playlists;\n    var codecs = unwrapCodecList(parseCodecs(codecString));\n    var codecCount_ = codecCount(codecs);\n    var videoDetails = codecs.video && parseCodecs(codecs.video)[0] || null;\n    var audioDetails = codecs.audio && parseCodecs(codecs.audio)[0] || null;\n    Object.keys(playlists).forEach(function (key) {\n      var variant = playlists[key]; // check if we already processed this playlist.\n      // or it if it is already excluded forever.\n\n      if (ids.indexOf(variant.id) !== -1 || variant.excludeUntil === Infinity) {\n        return;\n      }\n\n      ids.push(variant.id);\n      var blacklistReasons = []; // get codecs from the playlist for this variant\n\n      var variantCodecs = codecsForPlaylist(_this11.masterPlaylistLoader_.master, variant);\n      var variantCodecCount = codecCount(variantCodecs); // if no codecs are listed, we cannot determine that this\n      // variant is incompatible. Wait for mux.js to probe\n\n      if (!variantCodecs.audio && !variantCodecs.video) {\n        return;\n      } // TODO: we can support this by removing the\n      // old media source and creating a new one, but it will take some work.\n      // The number of streams cannot change\n\n\n      if (variantCodecCount !== codecCount_) {\n        blacklistReasons.push(\"codec count \\\"\" + variantCodecCount + \"\\\" !== \\\"\" + codecCount_ + \"\\\"\");\n      } // only exclude playlists by codec change, if codecs cannot switch\n      // during playback.\n\n\n      if (!_this11.sourceUpdater_.canChangeType()) {\n        var variantVideoDetails = variantCodecs.video && parseCodecs(variantCodecs.video)[0] || null;\n        var variantAudioDetails = variantCodecs.audio && parseCodecs(variantCodecs.audio)[0] || null; // the video codec cannot change\n\n        if (variantVideoDetails && videoDetails && variantVideoDetails.type.toLowerCase() !== videoDetails.type.toLowerCase()) {\n          blacklistReasons.push(\"video codec \\\"\" + variantVideoDetails.type + \"\\\" !== \\\"\" + videoDetails.type + \"\\\"\");\n        } // the audio codec cannot change\n\n\n        if (variantAudioDetails && audioDetails && variantAudioDetails.type.toLowerCase() !== audioDetails.type.toLowerCase()) {\n          blacklistReasons.push(\"audio codec \\\"\" + variantAudioDetails.type + \"\\\" !== \\\"\" + audioDetails.type + \"\\\"\");\n        }\n      }\n\n      if (blacklistReasons.length) {\n        variant.excludeUntil = Infinity;\n\n        _this11.logger_(\"blacklisting \" + variant.id + \": \" + blacklistReasons.join(' && '));\n      }\n    });\n  };\n\n  _proto.updateAdCues_ = function updateAdCues_(media) {\n    var offset = 0;\n    var seekable = this.seekable();\n\n    if (seekable.length) {\n      offset = seekable.start(0);\n    }\n\n    updateAdCues(media, this.cueTagsTrack_, offset);\n  }\n  /**\n   * Calculates the desired forward buffer length based on current time\n   *\n   * @return {number} Desired forward buffer length in seconds\n   */\n  ;\n\n  _proto.goalBufferLength = function goalBufferLength() {\n    var currentTime = this.tech_.currentTime();\n    var initial = Config.GOAL_BUFFER_LENGTH;\n    var rate = Config.GOAL_BUFFER_LENGTH_RATE;\n    var max = Math.max(initial, Config.MAX_GOAL_BUFFER_LENGTH);\n    return Math.min(initial + currentTime * rate, max);\n  }\n  /**\n   * Calculates the desired buffer low water line based on current time\n   *\n   * @return {number} Desired buffer low water line in seconds\n   */\n  ;\n\n  _proto.bufferLowWaterLine = function bufferLowWaterLine() {\n    var currentTime = this.tech_.currentTime();\n    var initial = Config.BUFFER_LOW_WATER_LINE;\n    var rate = Config.BUFFER_LOW_WATER_LINE_RATE;\n    var max = Math.max(initial, Config.MAX_BUFFER_LOW_WATER_LINE);\n    var newMax = Math.max(initial, Config.EXPERIMENTAL_MAX_BUFFER_LOW_WATER_LINE);\n    return Math.min(initial + currentTime * rate, this.experimentalBufferBasedABR ? newMax : max);\n  };\n\n  _proto.bufferHighWaterLine = function bufferHighWaterLine() {\n    return Config.BUFFER_HIGH_WATER_LINE;\n  };\n\n  return MasterPlaylistController;\n}(videojs.EventTarget);\n/**\n * Returns a function that acts as the Enable/disable playlist function.\n *\n * @param {PlaylistLoader} loader - The master playlist loader\n * @param {string} playlistID - id of the playlist\n * @param {Function} changePlaylistFn - A function to be called after a\n * playlist's enabled-state has been changed. Will NOT be called if a\n * playlist's enabled-state is unchanged\n * @param {boolean=} enable - Value to set the playlist enabled-state to\n * or if undefined returns the current enabled-state for the playlist\n * @return {Function} Function for setting/getting enabled\n */\n\n\nvar enableFunction = function enableFunction(loader, playlistID, changePlaylistFn) {\n  return function (enable) {\n    var playlist = loader.master.playlists[playlistID];\n    var incompatible = isIncompatible(playlist);\n    var currentlyEnabled = isEnabled(playlist);\n\n    if (typeof enable === 'undefined') {\n      return currentlyEnabled;\n    }\n\n    if (enable) {\n      delete playlist.disabled;\n    } else {\n      playlist.disabled = true;\n    }\n\n    if (enable !== currentlyEnabled && !incompatible) {\n      // Ensure the outside world knows about our changes\n      changePlaylistFn();\n\n      if (enable) {\n        loader.trigger('renditionenabled');\n      } else {\n        loader.trigger('renditiondisabled');\n      }\n    }\n\n    return enable;\n  };\n};\n/**\n * The representation object encapsulates the publicly visible information\n * in a media playlist along with a setter/getter-type function (enabled)\n * for changing the enabled-state of a particular playlist entry\n *\n * @class Representation\n */\n\n\nvar Representation = function Representation(vhsHandler, playlist, id) {\n  var mpc = vhsHandler.masterPlaylistController_,\n      smoothQualityChange = vhsHandler.options_.smoothQualityChange; // Get a reference to a bound version of the quality change function\n\n  var changeType = smoothQualityChange ? 'smooth' : 'fast';\n  var qualityChangeFunction = mpc[changeType + \"QualityChange_\"].bind(mpc); // some playlist attributes are optional\n\n  if (playlist.attributes) {\n    var resolution = playlist.attributes.RESOLUTION;\n    this.width = resolution && resolution.width;\n    this.height = resolution && resolution.height;\n    this.bandwidth = playlist.attributes.BANDWIDTH;\n  }\n\n  this.codecs = codecsForPlaylist(mpc.master(), playlist);\n  this.playlist = playlist; // The id is simply the ordinality of the media playlist\n  // within the master playlist\n\n  this.id = id; // Partially-apply the enableFunction to create a playlist-\n  // specific variant\n\n  this.enabled = enableFunction(vhsHandler.playlists, playlist.id, qualityChangeFunction);\n};\n/**\n * A mixin function that adds the `representations` api to an instance\n * of the VhsHandler class\n *\n * @param {VhsHandler} vhsHandler - An instance of VhsHandler to add the\n * representation API into\n */\n\n\nvar renditionSelectionMixin = function renditionSelectionMixin(vhsHandler) {\n  // Add a single API-specific function to the VhsHandler instance\n  vhsHandler.representations = function () {\n    var master = vhsHandler.masterPlaylistController_.master();\n    var playlists = isAudioOnly(master) ? vhsHandler.masterPlaylistController_.getAudioTrackPlaylists_() : master.playlists;\n\n    if (!playlists) {\n      return [];\n    }\n\n    return playlists.filter(function (media) {\n      return !isIncompatible(media);\n    }).map(function (e, i) {\n      return new Representation(vhsHandler, e, e.id);\n    });\n  };\n};\n/**\n * @file playback-watcher.js\n *\n * Playback starts, and now my watch begins. It shall not end until my death. I shall\n * take no wait, hold no uncleared timeouts, father no bad seeks. I shall wear no crowns\n * and win no glory. I shall live and die at my post. I am the corrector of the underflow.\n * I am the watcher of gaps. I am the shield that guards the realms of seekable. I pledge\n * my life and honor to the Playback Watch, for this Player and all the Players to come.\n */\n\n\nvar timerCancelEvents = ['seeking', 'seeked', 'pause', 'playing', 'error'];\n/**\n * @class PlaybackWatcher\n */\n\nvar PlaybackWatcher = /*#__PURE__*/function () {\n  /**\n   * Represents an PlaybackWatcher object.\n   *\n   * @class\n   * @param {Object} options an object that includes the tech and settings\n   */\n  function PlaybackWatcher(options) {\n    var _this = this;\n\n    this.masterPlaylistController_ = options.masterPlaylistController;\n    this.tech_ = options.tech;\n    this.seekable = options.seekable;\n    this.allowSeeksWithinUnsafeLiveWindow = options.allowSeeksWithinUnsafeLiveWindow;\n    this.liveRangeSafeTimeDelta = options.liveRangeSafeTimeDelta;\n    this.media = options.media;\n    this.consecutiveUpdates = 0;\n    this.lastRecordedTime = null;\n    this.timer_ = null;\n    this.checkCurrentTimeTimeout_ = null;\n    this.logger_ = logger('PlaybackWatcher');\n    this.logger_('initialize');\n\n    var playHandler = function playHandler() {\n      return _this.monitorCurrentTime_();\n    };\n\n    var canPlayHandler = function canPlayHandler() {\n      return _this.monitorCurrentTime_();\n    };\n\n    var waitingHandler = function waitingHandler() {\n      return _this.techWaiting_();\n    };\n\n    var cancelTimerHandler = function cancelTimerHandler() {\n      return _this.cancelTimer_();\n    };\n\n    var mpc = this.masterPlaylistController_;\n    var loaderTypes = ['main', 'subtitle', 'audio'];\n    var loaderChecks = {};\n    loaderTypes.forEach(function (type) {\n      loaderChecks[type] = {\n        reset: function reset() {\n          return _this.resetSegmentDownloads_(type);\n        },\n        updateend: function updateend() {\n          return _this.checkSegmentDownloads_(type);\n        }\n      };\n      mpc[type + \"SegmentLoader_\"].on('appendsdone', loaderChecks[type].updateend); // If a rendition switch happens during a playback stall where the buffer\n      // isn't changing we want to reset. We cannot assume that the new rendition\n      // will also be stalled, until after new appends.\n\n      mpc[type + \"SegmentLoader_\"].on('playlistupdate', loaderChecks[type].reset); // Playback stalls should not be detected right after seeking.\n      // This prevents one segment playlists (single vtt or single segment content)\n      // from being detected as stalling. As the buffer will not change in those cases, since\n      // the buffer is the entire video duration.\n\n      _this.tech_.on(['seeked', 'seeking'], loaderChecks[type].reset);\n    });\n    /**\n     * We check if a seek was into a gap through the following steps:\n     * 1. We get a seeking event and we do not get a seeked event. This means that\n     *    a seek was attempted but not completed.\n     * 2. We run `fixesBadSeeks_` on segment loader appends. This means that we already\n     *    removed everything from our buffer and appended a segment, and should be ready\n     *    to check for gaps.\n     */\n\n    var setSeekingHandlers = function setSeekingHandlers(fn) {\n      ['main', 'audio'].forEach(function (type) {\n        mpc[type + \"SegmentLoader_\"][fn]('appended', _this.seekingAppendCheck_);\n      });\n    };\n\n    this.seekingAppendCheck_ = function () {\n      if (_this.fixesBadSeeks_()) {\n        _this.consecutiveUpdates = 0;\n        _this.lastRecordedTime = _this.tech_.currentTime();\n        setSeekingHandlers('off');\n      }\n    };\n\n    this.clearSeekingAppendCheck_ = function () {\n      return setSeekingHandlers('off');\n    };\n\n    this.watchForBadSeeking_ = function () {\n      _this.clearSeekingAppendCheck_();\n\n      setSeekingHandlers('on');\n    };\n\n    this.tech_.on('seeked', this.clearSeekingAppendCheck_);\n    this.tech_.on('seeking', this.watchForBadSeeking_);\n    this.tech_.on('waiting', waitingHandler);\n    this.tech_.on(timerCancelEvents, cancelTimerHandler);\n    this.tech_.on('canplay', canPlayHandler);\n    /*\n      An edge case exists that results in gaps not being skipped when they exist at the beginning of a stream. This case\n      is surfaced in one of two ways:\n       1)  The `waiting` event is fired before the player has buffered content, making it impossible\n          to find or skip the gap. The `waiting` event is followed by a `play` event. On first play\n          we can check if playback is stalled due to a gap, and skip the gap if necessary.\n      2)  A source with a gap at the beginning of the stream is loaded programatically while the player\n          is in a playing state. To catch this case, it's important that our one-time play listener is setup\n          even if the player is in a playing state\n    */\n\n    this.tech_.one('play', playHandler); // Define the dispose function to clean up our events\n\n    this.dispose = function () {\n      _this.clearSeekingAppendCheck_();\n\n      _this.logger_('dispose');\n\n      _this.tech_.off('waiting', waitingHandler);\n\n      _this.tech_.off(timerCancelEvents, cancelTimerHandler);\n\n      _this.tech_.off('canplay', canPlayHandler);\n\n      _this.tech_.off('play', playHandler);\n\n      _this.tech_.off('seeking', _this.watchForBadSeeking_);\n\n      _this.tech_.off('seeked', _this.clearSeekingAppendCheck_);\n\n      loaderTypes.forEach(function (type) {\n        mpc[type + \"SegmentLoader_\"].off('appendsdone', loaderChecks[type].updateend);\n        mpc[type + \"SegmentLoader_\"].off('playlistupdate', loaderChecks[type].reset);\n\n        _this.tech_.off(['seeked', 'seeking'], loaderChecks[type].reset);\n      });\n\n      if (_this.checkCurrentTimeTimeout_) {\n        window$1.clearTimeout(_this.checkCurrentTimeTimeout_);\n      }\n\n      _this.cancelTimer_();\n    };\n  }\n  /**\n   * Periodically check current time to see if playback stopped\n   *\n   * @private\n   */\n\n\n  var _proto = PlaybackWatcher.prototype;\n\n  _proto.monitorCurrentTime_ = function monitorCurrentTime_() {\n    this.checkCurrentTime_();\n\n    if (this.checkCurrentTimeTimeout_) {\n      window$1.clearTimeout(this.checkCurrentTimeTimeout_);\n    } // 42 = 24 fps // 250 is what Webkit uses // FF uses 15\n\n\n    this.checkCurrentTimeTimeout_ = window$1.setTimeout(this.monitorCurrentTime_.bind(this), 250);\n  }\n  /**\n   * Reset stalled download stats for a specific type of loader\n   *\n   * @param {string} type\n   *        The segment loader type to check.\n   *\n   * @listens SegmentLoader#playlistupdate\n   * @listens Tech#seeking\n   * @listens Tech#seeked\n   */\n  ;\n\n  _proto.resetSegmentDownloads_ = function resetSegmentDownloads_(type) {\n    var loader = this.masterPlaylistController_[type + \"SegmentLoader_\"];\n\n    if (this[type + \"StalledDownloads_\"] > 0) {\n      this.logger_(\"resetting possible stalled download count for \" + type + \" loader\");\n    }\n\n    this[type + \"StalledDownloads_\"] = 0;\n    this[type + \"Buffered_\"] = loader.buffered_();\n  }\n  /**\n   * Checks on every segment `appendsdone` to see\n   * if segment appends are making progress. If they are not\n   * and we are still downloading bytes. We blacklist the playlist.\n   *\n   * @param {string} type\n   *        The segment loader type to check.\n   *\n   * @listens SegmentLoader#appendsdone\n   */\n  ;\n\n  _proto.checkSegmentDownloads_ = function checkSegmentDownloads_(type) {\n    var mpc = this.masterPlaylistController_;\n    var loader = mpc[type + \"SegmentLoader_\"];\n    var buffered = loader.buffered_();\n    var isBufferedDifferent = isRangeDifferent(this[type + \"Buffered_\"], buffered);\n    this[type + \"Buffered_\"] = buffered; // if another watcher is going to fix the issue or\n    // the buffered value for this loader changed\n    // appends are working\n\n    if (isBufferedDifferent) {\n      this.resetSegmentDownloads_(type);\n      return;\n    }\n\n    this[type + \"StalledDownloads_\"]++;\n    this.logger_(\"found #\" + this[type + \"StalledDownloads_\"] + \" \" + type + \" appends that did not increase buffer (possible stalled download)\", {\n      playlistId: loader.playlist_ && loader.playlist_.id,\n      buffered: timeRangesToArray(buffered)\n    }); // after 10 possibly stalled appends with no reset, exclude\n\n    if (this[type + \"StalledDownloads_\"] < 10) {\n      return;\n    }\n\n    this.logger_(type + \" loader stalled download exclusion\");\n    this.resetSegmentDownloads_(type);\n    this.tech_.trigger({\n      type: 'usage',\n      name: \"vhs-\" + type + \"-download-exclusion\"\n    });\n\n    if (type === 'subtitle') {\n      return;\n    } // TODO: should we exclude audio tracks rather than main tracks\n    // when type is audio?\n\n\n    mpc.blacklistCurrentPlaylist({\n      message: \"Excessive \" + type + \" segment downloading detected.\"\n    }, Infinity);\n  }\n  /**\n   * The purpose of this function is to emulate the \"waiting\" event on\n   * browsers that do not emit it when they are waiting for more\n   * data to continue playback\n   *\n   * @private\n   */\n  ;\n\n  _proto.checkCurrentTime_ = function checkCurrentTime_() {\n    if (this.tech_.paused() || this.tech_.seeking()) {\n      return;\n    }\n\n    var currentTime = this.tech_.currentTime();\n    var buffered = this.tech_.buffered();\n\n    if (this.lastRecordedTime === currentTime && (!buffered.length || currentTime + SAFE_TIME_DELTA >= buffered.end(buffered.length - 1))) {\n      // If current time is at the end of the final buffered region, then any playback\n      // stall is most likely caused by buffering in a low bandwidth environment. The tech\n      // should fire a `waiting` event in this scenario, but due to browser and tech\n      // inconsistencies. Calling `techWaiting_` here allows us to simulate\n      // responding to a native `waiting` event when the tech fails to emit one.\n      return this.techWaiting_();\n    }\n\n    if (this.consecutiveUpdates >= 5 && currentTime === this.lastRecordedTime) {\n      this.consecutiveUpdates++;\n      this.waiting_();\n    } else if (currentTime === this.lastRecordedTime) {\n      this.consecutiveUpdates++;\n    } else {\n      this.consecutiveUpdates = 0;\n      this.lastRecordedTime = currentTime;\n    }\n  }\n  /**\n   * Cancels any pending timers and resets the 'timeupdate' mechanism\n   * designed to detect that we are stalled\n   *\n   * @private\n   */\n  ;\n\n  _proto.cancelTimer_ = function cancelTimer_() {\n    this.consecutiveUpdates = 0;\n\n    if (this.timer_) {\n      this.logger_('cancelTimer_');\n      clearTimeout(this.timer_);\n    }\n\n    this.timer_ = null;\n  }\n  /**\n   * Fixes situations where there's a bad seek\n   *\n   * @return {boolean} whether an action was taken to fix the seek\n   * @private\n   */\n  ;\n\n  _proto.fixesBadSeeks_ = function fixesBadSeeks_() {\n    var seeking = this.tech_.seeking();\n\n    if (!seeking) {\n      return false;\n    } // TODO: It's possible that these seekable checks should be moved out of this function\n    // and into a function that runs on seekablechange. It's also possible that we only need\n    // afterSeekableWindow as the buffered check at the bottom is good enough to handle before\n    // seekable range.\n\n\n    var seekable = this.seekable();\n    var currentTime = this.tech_.currentTime();\n    var isAfterSeekableRange = this.afterSeekableWindow_(seekable, currentTime, this.media(), this.allowSeeksWithinUnsafeLiveWindow);\n    var seekTo;\n\n    if (isAfterSeekableRange) {\n      var seekableEnd = seekable.end(seekable.length - 1); // sync to live point (if VOD, our seekable was updated and we're simply adjusting)\n\n      seekTo = seekableEnd;\n    }\n\n    if (this.beforeSeekableWindow_(seekable, currentTime)) {\n      var seekableStart = seekable.start(0); // sync to the beginning of the live window\n      // provide a buffer of .1 seconds to handle rounding/imprecise numbers\n\n      seekTo = seekableStart + ( // if the playlist is too short and the seekable range is an exact time (can\n      // happen in live with a 3 segment playlist), then don't use a time delta\n      seekableStart === seekable.end(0) ? 0 : SAFE_TIME_DELTA);\n    }\n\n    if (typeof seekTo !== 'undefined') {\n      this.logger_(\"Trying to seek outside of seekable at time \" + currentTime + \" with \" + (\"seekable range \" + printableRange(seekable) + \". Seeking to \") + (seekTo + \".\"));\n      this.tech_.setCurrentTime(seekTo);\n      return true;\n    }\n\n    var sourceUpdater = this.masterPlaylistController_.sourceUpdater_;\n    var buffered = this.tech_.buffered();\n    var audioBuffered = sourceUpdater.audioBuffer ? sourceUpdater.audioBuffered() : null;\n    var videoBuffered = sourceUpdater.videoBuffer ? sourceUpdater.videoBuffered() : null;\n    var media = this.media(); // verify that at least two segment durations or one part duration have been\n    // appended before checking for a gap.\n\n    var minAppendedDuration = media.partTargetDuration ? media.partTargetDuration : (media.targetDuration - TIME_FUDGE_FACTOR) * 2; // verify that at least two segment durations have been\n    // appended before checking for a gap.\n\n    var bufferedToCheck = [audioBuffered, videoBuffered];\n\n    for (var i = 0; i < bufferedToCheck.length; i++) {\n      // skip null buffered\n      if (!bufferedToCheck[i]) {\n        continue;\n      }\n\n      var timeAhead = timeAheadOf(bufferedToCheck[i], currentTime); // if we are less than two video/audio segment durations or one part\n      // duration behind we haven't appended enough to call this a bad seek.\n\n      if (timeAhead < minAppendedDuration) {\n        return false;\n      }\n    }\n\n    var nextRange = findNextRange(buffered, currentTime); // we have appended enough content, but we don't have anything buffered\n    // to seek over the gap\n\n    if (nextRange.length === 0) {\n      return false;\n    }\n\n    seekTo = nextRange.start(0) + SAFE_TIME_DELTA;\n    this.logger_(\"Buffered region starts (\" + nextRange.start(0) + \") \" + (\" just beyond seek point (\" + currentTime + \"). Seeking to \" + seekTo + \".\"));\n    this.tech_.setCurrentTime(seekTo);\n    return true;\n  }\n  /**\n   * Handler for situations when we determine the player is waiting.\n   *\n   * @private\n   */\n  ;\n\n  _proto.waiting_ = function waiting_() {\n    if (this.techWaiting_()) {\n      return;\n    } // All tech waiting checks failed. Use last resort correction\n\n\n    var currentTime = this.tech_.currentTime();\n    var buffered = this.tech_.buffered();\n    var currentRange = findRange(buffered, currentTime); // Sometimes the player can stall for unknown reasons within a contiguous buffered\n    // region with no indication that anything is amiss (seen in Firefox). Seeking to\n    // currentTime is usually enough to kickstart the player. This checks that the player\n    // is currently within a buffered region before attempting a corrective seek.\n    // Chrome does not appear to continue `timeupdate` events after a `waiting` event\n    // until there is ~ 3 seconds of forward buffer available. PlaybackWatcher should also\n    // make sure there is ~3 seconds of forward buffer before taking any corrective action\n    // to avoid triggering an `unknownwaiting` event when the network is slow.\n\n    if (currentRange.length && currentTime + 3 <= currentRange.end(0)) {\n      this.cancelTimer_();\n      this.tech_.setCurrentTime(currentTime);\n      this.logger_(\"Stopped at \" + currentTime + \" while inside a buffered region \" + (\"[\" + currentRange.start(0) + \" -> \" + currentRange.end(0) + \"]. Attempting to resume \") + 'playback by seeking to the current time.'); // unknown waiting corrections may be useful for monitoring QoS\n\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-unknown-waiting'\n      });\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'hls-unknown-waiting'\n      });\n      return;\n    }\n  }\n  /**\n   * Handler for situations when the tech fires a `waiting` event\n   *\n   * @return {boolean}\n   *         True if an action (or none) was needed to correct the waiting. False if no\n   *         checks passed\n   * @private\n   */\n  ;\n\n  _proto.techWaiting_ = function techWaiting_() {\n    var seekable = this.seekable();\n    var currentTime = this.tech_.currentTime();\n\n    if (this.tech_.seeking() || this.timer_ !== null) {\n      // Tech is seeking or already waiting on another action, no action needed\n      return true;\n    }\n\n    if (this.beforeSeekableWindow_(seekable, currentTime)) {\n      var livePoint = seekable.end(seekable.length - 1);\n      this.logger_(\"Fell out of live window at time \" + currentTime + \". Seeking to \" + (\"live point (seekable end) \" + livePoint));\n      this.cancelTimer_();\n      this.tech_.setCurrentTime(livePoint); // live window resyncs may be useful for monitoring QoS\n\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-live-resync'\n      });\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'hls-live-resync'\n      });\n      return true;\n    }\n\n    var sourceUpdater = this.tech_.vhs.masterPlaylistController_.sourceUpdater_;\n    var buffered = this.tech_.buffered();\n    var videoUnderflow = this.videoUnderflow_({\n      audioBuffered: sourceUpdater.audioBuffered(),\n      videoBuffered: sourceUpdater.videoBuffered(),\n      currentTime: currentTime\n    });\n\n    if (videoUnderflow) {\n      // Even though the video underflowed and was stuck in a gap, the audio overplayed\n      // the gap, leading currentTime into a buffered range. Seeking to currentTime\n      // allows the video to catch up to the audio position without losing any audio\n      // (only suffering ~3 seconds of frozen video and a pause in audio playback).\n      this.cancelTimer_();\n      this.tech_.setCurrentTime(currentTime); // video underflow may be useful for monitoring QoS\n\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-video-underflow'\n      });\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'hls-video-underflow'\n      });\n      return true;\n    }\n\n    var nextRange = findNextRange(buffered, currentTime); // check for gap\n\n    if (nextRange.length > 0) {\n      var difference = nextRange.start(0) - currentTime;\n      this.logger_(\"Stopped at \" + currentTime + \", setting timer for \" + difference + \", seeking \" + (\"to \" + nextRange.start(0)));\n      this.cancelTimer_();\n      this.timer_ = setTimeout(this.skipTheGap_.bind(this), difference * 1000, currentTime);\n      return true;\n    } // All checks failed. Returning false to indicate failure to correct waiting\n\n\n    return false;\n  };\n\n  _proto.afterSeekableWindow_ = function afterSeekableWindow_(seekable, currentTime, playlist, allowSeeksWithinUnsafeLiveWindow) {\n    if (allowSeeksWithinUnsafeLiveWindow === void 0) {\n      allowSeeksWithinUnsafeLiveWindow = false;\n    }\n\n    if (!seekable.length) {\n      // we can't make a solid case if there's no seekable, default to false\n      return false;\n    }\n\n    var allowedEnd = seekable.end(seekable.length - 1) + SAFE_TIME_DELTA;\n    var isLive = !playlist.endList;\n\n    if (isLive && allowSeeksWithinUnsafeLiveWindow) {\n      allowedEnd = seekable.end(seekable.length - 1) + playlist.targetDuration * 3;\n    }\n\n    if (currentTime > allowedEnd) {\n      return true;\n    }\n\n    return false;\n  };\n\n  _proto.beforeSeekableWindow_ = function beforeSeekableWindow_(seekable, currentTime) {\n    if (seekable.length && // can't fall before 0 and 0 seekable start identifies VOD stream\n    seekable.start(0) > 0 && currentTime < seekable.start(0) - this.liveRangeSafeTimeDelta) {\n      return true;\n    }\n\n    return false;\n  };\n\n  _proto.videoUnderflow_ = function videoUnderflow_(_ref) {\n    var videoBuffered = _ref.videoBuffered,\n        audioBuffered = _ref.audioBuffered,\n        currentTime = _ref.currentTime; // audio only content will not have video underflow :)\n\n    if (!videoBuffered) {\n      return;\n    }\n\n    var gap; // find a gap in demuxed content.\n\n    if (videoBuffered.length && audioBuffered.length) {\n      // in Chrome audio will continue to play for ~3s when we run out of video\n      // so we have to check that the video buffer did have some buffer in the\n      // past.\n      var lastVideoRange = findRange(videoBuffered, currentTime - 3);\n      var videoRange = findRange(videoBuffered, currentTime);\n      var audioRange = findRange(audioBuffered, currentTime);\n\n      if (audioRange.length && !videoRange.length && lastVideoRange.length) {\n        gap = {\n          start: lastVideoRange.end(0),\n          end: audioRange.end(0)\n        };\n      } // find a gap in muxed content.\n\n    } else {\n      var nextRange = findNextRange(videoBuffered, currentTime); // Even if there is no available next range, there is still a possibility we are\n      // stuck in a gap due to video underflow.\n\n      if (!nextRange.length) {\n        gap = this.gapFromVideoUnderflow_(videoBuffered, currentTime);\n      }\n    }\n\n    if (gap) {\n      this.logger_(\"Encountered a gap in video from \" + gap.start + \" to \" + gap.end + \". \" + (\"Seeking to current time \" + currentTime));\n      return true;\n    }\n\n    return false;\n  }\n  /**\n   * Timer callback. If playback still has not proceeded, then we seek\n   * to the start of the next buffered region.\n   *\n   * @private\n   */\n  ;\n\n  _proto.skipTheGap_ = function skipTheGap_(scheduledCurrentTime) {\n    var buffered = this.tech_.buffered();\n    var currentTime = this.tech_.currentTime();\n    var nextRange = findNextRange(buffered, currentTime);\n    this.cancelTimer_();\n\n    if (nextRange.length === 0 || currentTime !== scheduledCurrentTime) {\n      return;\n    }\n\n    this.logger_('skipTheGap_:', 'currentTime:', currentTime, 'scheduled currentTime:', scheduledCurrentTime, 'nextRange start:', nextRange.start(0)); // only seek if we still have not played\n\n    this.tech_.setCurrentTime(nextRange.start(0) + TIME_FUDGE_FACTOR);\n    this.tech_.trigger({\n      type: 'usage',\n      name: 'vhs-gap-skip'\n    });\n    this.tech_.trigger({\n      type: 'usage',\n      name: 'hls-gap-skip'\n    });\n  };\n\n  _proto.gapFromVideoUnderflow_ = function gapFromVideoUnderflow_(buffered, currentTime) {\n    // At least in Chrome, if there is a gap in the video buffer, the audio will continue\n    // playing for ~3 seconds after the video gap starts. This is done to account for\n    // video buffer underflow/underrun (note that this is not done when there is audio\n    // buffer underflow/underrun -- in that case the video will stop as soon as it\n    // encounters the gap, as audio stalls are more noticeable/jarring to a user than\n    // video stalls). The player's time will reflect the playthrough of audio, so the\n    // time will appear as if we are in a buffered region, even if we are stuck in a\n    // \"gap.\"\n    //\n    // Example:\n    // video buffer:   0 => 10.1, 10.2 => 20\n    // audio buffer:   0 => 20\n    // overall buffer: 0 => 10.1, 10.2 => 20\n    // current time: 13\n    //\n    // Chrome's video froze at 10 seconds, where the video buffer encountered the gap,\n    // however, the audio continued playing until it reached ~3 seconds past the gap\n    // (13 seconds), at which point it stops as well. Since current time is past the\n    // gap, findNextRange will return no ranges.\n    //\n    // To check for this issue, we see if there is a gap that starts somewhere within\n    // a 3 second range (3 seconds +/- 1 second) back from our current time.\n    var gaps = findGaps(buffered);\n\n    for (var i = 0; i < gaps.length; i++) {\n      var start = gaps.start(i);\n      var end = gaps.end(i); // gap is starts no more than 4 seconds back\n\n      if (currentTime - start < 4 && currentTime - start > 2) {\n        return {\n          start: start,\n          end: end\n        };\n      }\n    }\n\n    return null;\n  };\n\n  return PlaybackWatcher;\n}();\n\nvar defaultOptions = {\n  errorInterval: 30,\n  getSource: function getSource(next) {\n    var tech = this.tech({\n      IWillNotUseThisInPlugins: true\n    });\n    var sourceObj = tech.currentSource_ || this.currentSource();\n    return next(sourceObj);\n  }\n};\n/**\n * Main entry point for the plugin\n *\n * @param {Player} player a reference to a videojs Player instance\n * @param {Object} [options] an object with plugin options\n * @private\n */\n\nvar initPlugin = function initPlugin(player, options) {\n  var lastCalled = 0;\n  var seekTo = 0;\n  var localOptions = videojs.mergeOptions(defaultOptions, options);\n  player.ready(function () {\n    player.trigger({\n      type: 'usage',\n      name: 'vhs-error-reload-initialized'\n    });\n    player.trigger({\n      type: 'usage',\n      name: 'hls-error-reload-initialized'\n    });\n  });\n  /**\n   * Player modifications to perform that must wait until `loadedmetadata`\n   * has been triggered\n   *\n   * @private\n   */\n\n  var loadedMetadataHandler = function loadedMetadataHandler() {\n    if (seekTo) {\n      player.currentTime(seekTo);\n    }\n  };\n  /**\n   * Set the source on the player element, play, and seek if necessary\n   *\n   * @param {Object} sourceObj An object specifying the source url and mime-type to play\n   * @private\n   */\n\n\n  var setSource = function setSource(sourceObj) {\n    if (sourceObj === null || sourceObj === undefined) {\n      return;\n    }\n\n    seekTo = player.duration() !== Infinity && player.currentTime() || 0;\n    player.one('loadedmetadata', loadedMetadataHandler);\n    player.src(sourceObj);\n    player.trigger({\n      type: 'usage',\n      name: 'vhs-error-reload'\n    });\n    player.trigger({\n      type: 'usage',\n      name: 'hls-error-reload'\n    });\n    player.play();\n  };\n  /**\n   * Attempt to get a source from either the built-in getSource function\n   * or a custom function provided via the options\n   *\n   * @private\n   */\n\n\n  var errorHandler = function errorHandler() {\n    // Do not attempt to reload the source if a source-reload occurred before\n    // 'errorInterval' time has elapsed since the last source-reload\n    if (Date.now() - lastCalled < localOptions.errorInterval * 1000) {\n      player.trigger({\n        type: 'usage',\n        name: 'vhs-error-reload-canceled'\n      });\n      player.trigger({\n        type: 'usage',\n        name: 'hls-error-reload-canceled'\n      });\n      return;\n    }\n\n    if (!localOptions.getSource || typeof localOptions.getSource !== 'function') {\n      videojs.log.error('ERROR: reloadSourceOnError - The option getSource must be a function!');\n      return;\n    }\n\n    lastCalled = Date.now();\n    return localOptions.getSource.call(player, setSource);\n  };\n  /**\n   * Unbind any event handlers that were bound by the plugin\n   *\n   * @private\n   */\n\n\n  var cleanupEvents = function cleanupEvents() {\n    player.off('loadedmetadata', loadedMetadataHandler);\n    player.off('error', errorHandler);\n    player.off('dispose', cleanupEvents);\n  };\n  /**\n   * Cleanup before re-initializing the plugin\n   *\n   * @param {Object} [newOptions] an object with plugin options\n   * @private\n   */\n\n\n  var reinitPlugin = function reinitPlugin(newOptions) {\n    cleanupEvents();\n    initPlugin(player, newOptions);\n  };\n\n  player.on('error', errorHandler);\n  player.on('dispose', cleanupEvents); // Overwrite the plugin function so that we can correctly cleanup before\n  // initializing the plugin\n\n  player.reloadSourceOnError = reinitPlugin;\n};\n/**\n * Reload the source when an error is detected as long as there\n * wasn't an error previously within the last 30 seconds\n *\n * @param {Object} [options] an object with plugin options\n */\n\n\nvar reloadSourceOnError = function reloadSourceOnError(options) {\n  initPlugin(this, options);\n};\n\nvar version$4 = \"2.13.1\";\nvar version$3 = \"6.0.1\";\nvar version$2 = \"0.21.0\";\nvar version$1 = \"4.7.0\";\nvar version = \"3.1.2\";\nvar Vhs = {\n  PlaylistLoader: PlaylistLoader,\n  Playlist: Playlist,\n  utils: utils,\n  STANDARD_PLAYLIST_SELECTOR: lastBandwidthSelector,\n  INITIAL_PLAYLIST_SELECTOR: lowestBitrateCompatibleVariantSelector,\n  lastBandwidthSelector: lastBandwidthSelector,\n  movingAverageBandwidthSelector: movingAverageBandwidthSelector,\n  comparePlaylistBandwidth: comparePlaylistBandwidth,\n  comparePlaylistResolution: comparePlaylistResolution,\n  xhr: xhrFactory()\n}; // Define getter/setters for config properties\n\nObject.keys(Config).forEach(function (prop) {\n  Object.defineProperty(Vhs, prop, {\n    get: function get() {\n      videojs.log.warn(\"using Vhs.\" + prop + \" is UNSAFE be sure you know what you are doing\");\n      return Config[prop];\n    },\n    set: function set(value) {\n      videojs.log.warn(\"using Vhs.\" + prop + \" is UNSAFE be sure you know what you are doing\");\n\n      if (typeof value !== 'number' || value < 0) {\n        videojs.log.warn(\"value of Vhs.\" + prop + \" must be greater than or equal to 0\");\n        return;\n      }\n\n      Config[prop] = value;\n    }\n  });\n});\nvar LOCAL_STORAGE_KEY = 'videojs-vhs';\n/**\n * Updates the selectedIndex of the QualityLevelList when a mediachange happens in vhs.\n *\n * @param {QualityLevelList} qualityLevels The QualityLevelList to update.\n * @param {PlaylistLoader} playlistLoader PlaylistLoader containing the new media info.\n * @function handleVhsMediaChange\n */\n\nvar handleVhsMediaChange = function handleVhsMediaChange(qualityLevels, playlistLoader) {\n  var newPlaylist = playlistLoader.media();\n  var selectedIndex = -1;\n\n  for (var i = 0; i < qualityLevels.length; i++) {\n    if (qualityLevels[i].id === newPlaylist.id) {\n      selectedIndex = i;\n      break;\n    }\n  }\n\n  qualityLevels.selectedIndex_ = selectedIndex;\n  qualityLevels.trigger({\n    selectedIndex: selectedIndex,\n    type: 'change'\n  });\n};\n/**\n * Adds quality levels to list once playlist metadata is available\n *\n * @param {QualityLevelList} qualityLevels The QualityLevelList to attach events to.\n * @param {Object} vhs Vhs object to listen to for media events.\n * @function handleVhsLoadedMetadata\n */\n\n\nvar handleVhsLoadedMetadata = function handleVhsLoadedMetadata(qualityLevels, vhs) {\n  vhs.representations().forEach(function (rep) {\n    qualityLevels.addQualityLevel(rep);\n  });\n  handleVhsMediaChange(qualityLevels, vhs.playlists);\n}; // HLS is a source handler, not a tech. Make sure attempts to use it\n// as one do not cause exceptions.\n\n\nVhs.canPlaySource = function () {\n  return videojs.log.warn('HLS is no longer a tech. Please remove it from ' + 'your player\\'s techOrder.');\n};\n\nvar emeKeySystems = function emeKeySystems(keySystemOptions, mainPlaylist, audioPlaylist) {\n  if (!keySystemOptions) {\n    return keySystemOptions;\n  }\n\n  var codecs = {};\n\n  if (mainPlaylist && mainPlaylist.attributes && mainPlaylist.attributes.CODECS) {\n    codecs = unwrapCodecList(parseCodecs(mainPlaylist.attributes.CODECS));\n  }\n\n  if (audioPlaylist && audioPlaylist.attributes && audioPlaylist.attributes.CODECS) {\n    codecs.audio = audioPlaylist.attributes.CODECS;\n  }\n\n  var videoContentType = getMimeForCodec(codecs.video);\n  var audioContentType = getMimeForCodec(codecs.audio); // upsert the content types based on the selected playlist\n\n  var keySystemContentTypes = {};\n\n  for (var keySystem in keySystemOptions) {\n    keySystemContentTypes[keySystem] = {};\n\n    if (audioContentType) {\n      keySystemContentTypes[keySystem].audioContentType = audioContentType;\n    }\n\n    if (videoContentType) {\n      keySystemContentTypes[keySystem].videoContentType = videoContentType;\n    } // Default to using the video playlist's PSSH even though they may be different, as\n    // videojs-contrib-eme will only accept one in the options.\n    //\n    // This shouldn't be an issue for most cases as early intialization will handle all\n    // unique PSSH values, and if they aren't, then encrypted events should have the\n    // specific information needed for the unique license.\n\n\n    if (mainPlaylist.contentProtection && mainPlaylist.contentProtection[keySystem] && mainPlaylist.contentProtection[keySystem].pssh) {\n      keySystemContentTypes[keySystem].pssh = mainPlaylist.contentProtection[keySystem].pssh;\n    } // videojs-contrib-eme accepts the option of specifying: 'com.some.cdm': 'url'\n    // so we need to prevent overwriting the URL entirely\n\n\n    if (typeof keySystemOptions[keySystem] === 'string') {\n      keySystemContentTypes[keySystem].url = keySystemOptions[keySystem];\n    }\n  }\n\n  return videojs.mergeOptions(keySystemOptions, keySystemContentTypes);\n};\n/**\n * @typedef {Object} KeySystems\n *\n * keySystems configuration for https://github.com/videojs/videojs-contrib-eme\n * Note: not all options are listed here.\n *\n * @property {Uint8Array} [pssh]\n *           Protection System Specific Header\n */\n\n/**\n * Goes through all the playlists and collects an array of KeySystems options objects\n * containing each playlist's keySystems and their pssh values, if available.\n *\n * @param {Object[]} playlists\n *        The playlists to look through\n * @param {string[]} keySystems\n *        The keySystems to collect pssh values for\n *\n * @return {KeySystems[]}\n *         An array of KeySystems objects containing available key systems and their\n *         pssh values\n */\n\n\nvar getAllPsshKeySystemsOptions = function getAllPsshKeySystemsOptions(playlists, keySystems) {\n  return playlists.reduce(function (keySystemsArr, playlist) {\n    if (!playlist.contentProtection) {\n      return keySystemsArr;\n    }\n\n    var keySystemsOptions = keySystems.reduce(function (keySystemsObj, keySystem) {\n      var keySystemOptions = playlist.contentProtection[keySystem];\n\n      if (keySystemOptions && keySystemOptions.pssh) {\n        keySystemsObj[keySystem] = {\n          pssh: keySystemOptions.pssh\n        };\n      }\n\n      return keySystemsObj;\n    }, {});\n\n    if (Object.keys(keySystemsOptions).length) {\n      keySystemsArr.push(keySystemsOptions);\n    }\n\n    return keySystemsArr;\n  }, []);\n};\n/**\n * Returns a promise that waits for the\n * [eme plugin](https://github.com/videojs/videojs-contrib-eme) to create a key session.\n *\n * Works around https://bugs.chromium.org/p/chromium/issues/detail?id=895449 in non-IE11\n * browsers.\n *\n * As per the above ticket, this is particularly important for Chrome, where, if\n * unencrypted content is appended before encrypted content and the key session has not\n * been created, a MEDIA_ERR_DECODE will be thrown once the encrypted content is reached\n * during playback.\n *\n * @param {Object} player\n *        The player instance\n * @param {Object[]} sourceKeySystems\n *        The key systems options from the player source\n * @param {Object} [audioMedia]\n *        The active audio media playlist (optional)\n * @param {Object[]} mainPlaylists\n *        The playlists found on the master playlist object\n *\n * @return {Object}\n *         Promise that resolves when the key session has been created\n */\n\n\nvar waitForKeySessionCreation = function waitForKeySessionCreation(_ref) {\n  var player = _ref.player,\n      sourceKeySystems = _ref.sourceKeySystems,\n      audioMedia = _ref.audioMedia,\n      mainPlaylists = _ref.mainPlaylists;\n\n  if (!player.eme.initializeMediaKeys) {\n    return Promise.resolve();\n  } // TODO should all audio PSSH values be initialized for DRM?\n  //\n  // All unique video rendition pssh values are initialized for DRM, but here only\n  // the initial audio playlist license is initialized. In theory, an encrypted\n  // event should be fired if the user switches to an alternative audio playlist\n  // where a license is required, but this case hasn't yet been tested. In addition, there\n  // may be many alternate audio playlists unlikely to be used (e.g., multiple different\n  // languages).\n\n\n  var playlists = audioMedia ? mainPlaylists.concat([audioMedia]) : mainPlaylists;\n  var keySystemsOptionsArr = getAllPsshKeySystemsOptions(playlists, Object.keys(sourceKeySystems));\n  var initializationFinishedPromises = [];\n  var keySessionCreatedPromises = []; // Since PSSH values are interpreted as initData, EME will dedupe any duplicates. The\n  // only place where it should not be deduped is for ms-prefixed APIs, but the early\n  // return for IE11 above, and the existence of modern EME APIs in addition to\n  // ms-prefixed APIs on Edge should prevent this from being a concern.\n  // initializeMediaKeys also won't use the webkit-prefixed APIs.\n\n  keySystemsOptionsArr.forEach(function (keySystemsOptions) {\n    keySessionCreatedPromises.push(new Promise(function (resolve, reject) {\n      player.tech_.one('keysessioncreated', resolve);\n    }));\n    initializationFinishedPromises.push(new Promise(function (resolve, reject) {\n      player.eme.initializeMediaKeys({\n        keySystems: keySystemsOptions\n      }, function (err) {\n        if (err) {\n          reject(err);\n          return;\n        }\n\n        resolve();\n      });\n    }));\n  }); // The reasons Promise.race is chosen over Promise.any:\n  //\n  // * Promise.any is only available in Safari 14+.\n  // * None of these promises are expected to reject. If they do reject, it might be\n  //   better here for the race to surface the rejection, rather than mask it by using\n  //   Promise.any.\n\n  return Promise.race([// If a session was previously created, these will all finish resolving without\n  // creating a new session, otherwise it will take until the end of all license\n  // requests, which is why the key session check is used (to make setup much faster).\n  Promise.all(initializationFinishedPromises), // Once a single session is created, the browser knows DRM will be used.\n  Promise.race(keySessionCreatedPromises)]);\n};\n/**\n * If the [eme](https://github.com/videojs/videojs-contrib-eme) plugin is available, and\n * there are keySystems on the source, sets up source options to prepare the source for\n * eme.\n *\n * @param {Object} player\n *        The player instance\n * @param {Object[]} sourceKeySystems\n *        The key systems options from the player source\n * @param {Object} media\n *        The active media playlist\n * @param {Object} [audioMedia]\n *        The active audio media playlist (optional)\n *\n * @return {boolean}\n *         Whether or not options were configured and EME is available\n */\n\n\nvar setupEmeOptions = function setupEmeOptions(_ref2) {\n  var player = _ref2.player,\n      sourceKeySystems = _ref2.sourceKeySystems,\n      media = _ref2.media,\n      audioMedia = _ref2.audioMedia;\n  var sourceOptions = emeKeySystems(sourceKeySystems, media, audioMedia);\n\n  if (!sourceOptions) {\n    return false;\n  }\n\n  player.currentSource().keySystems = sourceOptions; // eme handles the rest of the setup, so if it is missing\n  // do nothing.\n\n  if (sourceOptions && !player.eme) {\n    videojs.log.warn('DRM encrypted source cannot be decrypted without a DRM plugin');\n    return false;\n  }\n\n  return true;\n};\n\nvar getVhsLocalStorage = function getVhsLocalStorage() {\n  if (!window$1.localStorage) {\n    return null;\n  }\n\n  var storedObject = window$1.localStorage.getItem(LOCAL_STORAGE_KEY);\n\n  if (!storedObject) {\n    return null;\n  }\n\n  try {\n    return JSON.parse(storedObject);\n  } catch (e) {\n    // someone may have tampered with the value\n    return null;\n  }\n};\n\nvar updateVhsLocalStorage = function updateVhsLocalStorage(options) {\n  if (!window$1.localStorage) {\n    return false;\n  }\n\n  var objectToStore = getVhsLocalStorage();\n  objectToStore = objectToStore ? videojs.mergeOptions(objectToStore, options) : options;\n\n  try {\n    window$1.localStorage.setItem(LOCAL_STORAGE_KEY, JSON.stringify(objectToStore));\n  } catch (e) {\n    // Throws if storage is full (e.g., always on iOS 5+ Safari private mode, where\n    // storage is set to 0).\n    // https://developer.mozilla.org/en-US/docs/Web/API/Storage/setItem#Exceptions\n    // No need to perform any operation.\n    return false;\n  }\n\n  return objectToStore;\n};\n/**\n * Parses VHS-supported media types from data URIs. See\n * https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Data_URIs\n * for information on data URIs.\n *\n * @param {string} dataUri\n *        The data URI\n *\n * @return {string|Object}\n *         The parsed object/string, or the original string if no supported media type\n *         was found\n */\n\n\nvar expandDataUri = function expandDataUri(dataUri) {\n  if (dataUri.toLowerCase().indexOf('data:application/vnd.videojs.vhs+json,') === 0) {\n    return JSON.parse(dataUri.substring(dataUri.indexOf(',') + 1));\n  } // no known case for this data URI, return the string as-is\n\n\n  return dataUri;\n};\n/**\n * Whether the browser has built-in HLS support.\n */\n\n\nVhs.supportsNativeHls = function () {\n  if (!document || !document.createElement) {\n    return false;\n  }\n\n  var video = document.createElement('video'); // native HLS is definitely not supported if HTML5 video isn't\n\n  if (!videojs.getTech('Html5').isSupported()) {\n    return false;\n  } // HLS manifests can go by many mime-types\n\n\n  var canPlay = [// Apple santioned\n  'application/vnd.apple.mpegurl', // Apple sanctioned for backwards compatibility\n  'audio/mpegurl', // Very common\n  'audio/x-mpegurl', // Very common\n  'application/x-mpegurl', // Included for completeness\n  'video/x-mpegurl', 'video/mpegurl', 'application/mpegurl'];\n  return canPlay.some(function (canItPlay) {\n    return /maybe|probably/i.test(video.canPlayType(canItPlay));\n  });\n}();\n\nVhs.supportsNativeDash = function () {\n  if (!document || !document.createElement || !videojs.getTech('Html5').isSupported()) {\n    return false;\n  }\n\n  return /maybe|probably/i.test(document.createElement('video').canPlayType('application/dash+xml'));\n}();\n\nVhs.supportsTypeNatively = function (type) {\n  if (type === 'hls') {\n    return Vhs.supportsNativeHls;\n  }\n\n  if (type === 'dash') {\n    return Vhs.supportsNativeDash;\n  }\n\n  return false;\n};\n/**\n * HLS is a source handler, not a tech. Make sure attempts to use it\n * as one do not cause exceptions.\n */\n\n\nVhs.isSupported = function () {\n  return videojs.log.warn('HLS is no longer a tech. Please remove it from ' + 'your player\\'s techOrder.');\n};\n\nvar Component = videojs.getComponent('Component');\n/**\n * The Vhs Handler object, where we orchestrate all of the parts\n * of HLS to interact with video.js\n *\n * @class VhsHandler\n * @extends videojs.Component\n * @param {Object} source the soruce object\n * @param {Tech} tech the parent tech object\n * @param {Object} options optional and required options\n */\n\nvar VhsHandler = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(VhsHandler, _Component);\n\n  function VhsHandler(source, tech, options) {\n    var _this;\n\n    _this = _Component.call(this, tech, videojs.mergeOptions(options.hls, options.vhs)) || this;\n\n    if (options.hls && Object.keys(options.hls).length) {\n      videojs.log.warn('Using hls options is deprecated. Use vhs instead.');\n    } // if a tech level `initialBandwidth` option was passed\n    // use that over the VHS level `bandwidth` option\n\n\n    if (typeof options.initialBandwidth === 'number') {\n      _this.options_.bandwidth = options.initialBandwidth;\n    }\n\n    _this.logger_ = logger('VhsHandler'); // tech.player() is deprecated but setup a reference to HLS for\n    // backwards-compatibility\n\n    if (tech.options_ && tech.options_.playerId) {\n      var _player = videojs(tech.options_.playerId);\n\n      if (!_player.hasOwnProperty('hls')) {\n        Object.defineProperty(_player, 'hls', {\n          get: function get() {\n            videojs.log.warn('player.hls is deprecated. Use player.tech().vhs instead.');\n            tech.trigger({\n              type: 'usage',\n              name: 'hls-player-access'\n            });\n            return _assertThisInitialized(_this);\n          },\n          configurable: true\n        });\n      }\n\n      if (!_player.hasOwnProperty('vhs')) {\n        Object.defineProperty(_player, 'vhs', {\n          get: function get() {\n            videojs.log.warn('player.vhs is deprecated. Use player.tech().vhs instead.');\n            tech.trigger({\n              type: 'usage',\n              name: 'vhs-player-access'\n            });\n            return _assertThisInitialized(_this);\n          },\n          configurable: true\n        });\n      }\n\n      if (!_player.hasOwnProperty('dash')) {\n        Object.defineProperty(_player, 'dash', {\n          get: function get() {\n            videojs.log.warn('player.dash is deprecated. Use player.tech().vhs instead.');\n            return _assertThisInitialized(_this);\n          },\n          configurable: true\n        });\n      }\n\n      _this.player_ = _player;\n    }\n\n    _this.tech_ = tech;\n    _this.source_ = source;\n    _this.stats = {};\n    _this.ignoreNextSeekingEvent_ = false;\n\n    _this.setOptions_();\n\n    if (_this.options_.overrideNative && tech.overrideNativeAudioTracks && tech.overrideNativeVideoTracks) {\n      tech.overrideNativeAudioTracks(true);\n      tech.overrideNativeVideoTracks(true);\n    } else if (_this.options_.overrideNative && (tech.featuresNativeVideoTracks || tech.featuresNativeAudioTracks)) {\n      // overriding native HLS only works if audio tracks have been emulated\n      // error early if we're misconfigured\n      throw new Error('Overriding native HLS requires emulated tracks. ' + 'See https://git.io/vMpjB');\n    } // listen for fullscreenchange events for this player so that we\n    // can adjust our quality selection quickly\n\n\n    _this.on(document, ['fullscreenchange', 'webkitfullscreenchange', 'mozfullscreenchange', 'MSFullscreenChange'], function (event) {\n      var fullscreenElement = document.fullscreenElement || document.webkitFullscreenElement || document.mozFullScreenElement || document.msFullscreenElement;\n\n      if (fullscreenElement && fullscreenElement.contains(_this.tech_.el())) {\n        _this.masterPlaylistController_.fastQualityChange_();\n      } else {\n        // When leaving fullscreen, since the in page pixel dimensions should be smaller\n        // than full screen, see if there should be a rendition switch down to preserve\n        // bandwidth.\n        _this.masterPlaylistController_.checkABR_();\n      }\n    });\n\n    _this.on(_this.tech_, 'seeking', function () {\n      if (this.ignoreNextSeekingEvent_) {\n        this.ignoreNextSeekingEvent_ = false;\n        return;\n      }\n\n      this.setCurrentTime(this.tech_.currentTime());\n    });\n\n    _this.on(_this.tech_, 'error', function () {\n      // verify that the error was real and we are loaded\n      // enough to have mpc loaded.\n      if (this.tech_.error() && this.masterPlaylistController_) {\n        this.masterPlaylistController_.pauseLoading();\n      }\n    });\n\n    _this.on(_this.tech_, 'play', _this.play);\n\n    return _this;\n  }\n\n  var _proto = VhsHandler.prototype;\n\n  _proto.setOptions_ = function setOptions_() {\n    var _this2 = this; // defaults\n\n\n    this.options_.withCredentials = this.options_.withCredentials || false;\n    this.options_.handleManifestRedirects = this.options_.handleManifestRedirects === false ? false : true;\n    this.options_.limitRenditionByPlayerDimensions = this.options_.limitRenditionByPlayerDimensions === false ? false : true;\n    this.options_.useDevicePixelRatio = this.options_.useDevicePixelRatio || false;\n    this.options_.smoothQualityChange = this.options_.smoothQualityChange || false;\n    this.options_.useBandwidthFromLocalStorage = typeof this.source_.useBandwidthFromLocalStorage !== 'undefined' ? this.source_.useBandwidthFromLocalStorage : this.options_.useBandwidthFromLocalStorage || false;\n    this.options_.useNetworkInformationApi = this.options_.useNetworkInformationApi || false;\n    this.options_.customTagParsers = this.options_.customTagParsers || [];\n    this.options_.customTagMappers = this.options_.customTagMappers || [];\n    this.options_.cacheEncryptionKeys = this.options_.cacheEncryptionKeys || false;\n\n    if (typeof this.options_.blacklistDuration !== 'number') {\n      this.options_.blacklistDuration = 5 * 60;\n    }\n\n    if (typeof this.options_.bandwidth !== 'number') {\n      if (this.options_.useBandwidthFromLocalStorage) {\n        var storedObject = getVhsLocalStorage();\n\n        if (storedObject && storedObject.bandwidth) {\n          this.options_.bandwidth = storedObject.bandwidth;\n          this.tech_.trigger({\n            type: 'usage',\n            name: 'vhs-bandwidth-from-local-storage'\n          });\n          this.tech_.trigger({\n            type: 'usage',\n            name: 'hls-bandwidth-from-local-storage'\n          });\n        }\n\n        if (storedObject && storedObject.throughput) {\n          this.options_.throughput = storedObject.throughput;\n          this.tech_.trigger({\n            type: 'usage',\n            name: 'vhs-throughput-from-local-storage'\n          });\n          this.tech_.trigger({\n            type: 'usage',\n            name: 'hls-throughput-from-local-storage'\n          });\n        }\n      }\n    } // if bandwidth was not set by options or pulled from local storage, start playlist\n    // selection at a reasonable bandwidth\n\n\n    if (typeof this.options_.bandwidth !== 'number') {\n      this.options_.bandwidth = Config.INITIAL_BANDWIDTH;\n    } // If the bandwidth number is unchanged from the initial setting\n    // then this takes precedence over the enableLowInitialPlaylist option\n\n\n    this.options_.enableLowInitialPlaylist = this.options_.enableLowInitialPlaylist && this.options_.bandwidth === Config.INITIAL_BANDWIDTH; // grab options passed to player.src\n\n    ['withCredentials', 'useDevicePixelRatio', 'limitRenditionByPlayerDimensions', 'bandwidth', 'smoothQualityChange', 'customTagParsers', 'customTagMappers', 'handleManifestRedirects', 'cacheEncryptionKeys', 'playlistSelector', 'initialPlaylistSelector', 'experimentalBufferBasedABR', 'liveRangeSafeTimeDelta', 'experimentalLLHLS', 'useNetworkInformationApi', 'experimentalExactManifestTimings', 'experimentalLeastPixelDiffSelector'].forEach(function (option) {\n      if (typeof _this2.source_[option] !== 'undefined') {\n        _this2.options_[option] = _this2.source_[option];\n      }\n    });\n    this.limitRenditionByPlayerDimensions = this.options_.limitRenditionByPlayerDimensions;\n    this.useDevicePixelRatio = this.options_.useDevicePixelRatio;\n  }\n  /**\n   * called when player.src gets called, handle a new source\n   *\n   * @param {Object} src the source object to handle\n   */\n  ;\n\n  _proto.src = function src(_src, type) {\n    var _this3 = this; // do nothing if the src is falsey\n\n\n    if (!_src) {\n      return;\n    }\n\n    this.setOptions_(); // add master playlist controller options\n\n    this.options_.src = expandDataUri(this.source_.src);\n    this.options_.tech = this.tech_;\n    this.options_.externVhs = Vhs;\n    this.options_.sourceType = simpleTypeFromSourceType(type); // Whenever we seek internally, we should update the tech\n\n    this.options_.seekTo = function (time) {\n      _this3.tech_.setCurrentTime(time);\n    };\n\n    if (this.options_.smoothQualityChange) {\n      videojs.log.warn('smoothQualityChange is deprecated and will be removed in the next major version');\n    }\n\n    this.masterPlaylistController_ = new MasterPlaylistController(this.options_);\n    var playbackWatcherOptions = videojs.mergeOptions({\n      liveRangeSafeTimeDelta: SAFE_TIME_DELTA\n    }, this.options_, {\n      seekable: function seekable() {\n        return _this3.seekable();\n      },\n      media: function media() {\n        return _this3.masterPlaylistController_.media();\n      },\n      masterPlaylistController: this.masterPlaylistController_\n    });\n    this.playbackWatcher_ = new PlaybackWatcher(playbackWatcherOptions);\n    this.masterPlaylistController_.on('error', function () {\n      var player = videojs.players[_this3.tech_.options_.playerId];\n      var error = _this3.masterPlaylistController_.error;\n\n      if (typeof error === 'object' && !error.code) {\n        error.code = 3;\n      } else if (typeof error === 'string') {\n        error = {\n          message: error,\n          code: 3\n        };\n      }\n\n      player.error(error);\n    });\n    var defaultSelector = this.options_.experimentalBufferBasedABR ? Vhs.movingAverageBandwidthSelector(0.55) : Vhs.STANDARD_PLAYLIST_SELECTOR; // `this` in selectPlaylist should be the VhsHandler for backwards\n    // compatibility with < v2\n\n    this.masterPlaylistController_.selectPlaylist = this.selectPlaylist ? this.selectPlaylist.bind(this) : defaultSelector.bind(this);\n    this.masterPlaylistController_.selectInitialPlaylist = Vhs.INITIAL_PLAYLIST_SELECTOR.bind(this); // re-expose some internal objects for backwards compatibility with < v2\n\n    this.playlists = this.masterPlaylistController_.masterPlaylistLoader_;\n    this.mediaSource = this.masterPlaylistController_.mediaSource; // Proxy assignment of some properties to the master playlist\n    // controller. Using a custom property for backwards compatibility\n    // with < v2\n\n    Object.defineProperties(this, {\n      selectPlaylist: {\n        get: function get() {\n          return this.masterPlaylistController_.selectPlaylist;\n        },\n        set: function set(selectPlaylist) {\n          this.masterPlaylistController_.selectPlaylist = selectPlaylist.bind(this);\n        }\n      },\n      throughput: {\n        get: function get() {\n          return this.masterPlaylistController_.mainSegmentLoader_.throughput.rate;\n        },\n        set: function set(throughput) {\n          this.masterPlaylistController_.mainSegmentLoader_.throughput.rate = throughput; // By setting `count` to 1 the throughput value becomes the starting value\n          // for the cumulative average\n\n          this.masterPlaylistController_.mainSegmentLoader_.throughput.count = 1;\n        }\n      },\n      bandwidth: {\n        get: function get() {\n          var playerBandwidthEst = this.masterPlaylistController_.mainSegmentLoader_.bandwidth;\n          var networkInformation = window$1.navigator.connection || window$1.navigator.mozConnection || window$1.navigator.webkitConnection;\n          var tenMbpsAsBitsPerSecond = 10e6;\n\n          if (this.options_.useNetworkInformationApi && networkInformation) {\n            // downlink returns Mbps\n            // https://developer.mozilla.org/en-US/docs/Web/API/NetworkInformation/downlink\n            var networkInfoBandwidthEstBitsPerSec = networkInformation.downlink * 1000 * 1000; // downlink maxes out at 10 Mbps. In the event that both networkInformationApi and the player\n            // estimate a bandwidth greater than 10 Mbps, use the larger of the two estimates to ensure that\n            // high quality streams are not filtered out.\n\n            if (networkInfoBandwidthEstBitsPerSec >= tenMbpsAsBitsPerSecond && playerBandwidthEst >= tenMbpsAsBitsPerSecond) {\n              playerBandwidthEst = Math.max(playerBandwidthEst, networkInfoBandwidthEstBitsPerSec);\n            } else {\n              playerBandwidthEst = networkInfoBandwidthEstBitsPerSec;\n            }\n          }\n\n          return playerBandwidthEst;\n        },\n        set: function set(bandwidth) {\n          this.masterPlaylistController_.mainSegmentLoader_.bandwidth = bandwidth; // setting the bandwidth manually resets the throughput counter\n          // `count` is set to zero that current value of `rate` isn't included\n          // in the cumulative average\n\n          this.masterPlaylistController_.mainSegmentLoader_.throughput = {\n            rate: 0,\n            count: 0\n          };\n        }\n      },\n\n      /**\n       * `systemBandwidth` is a combination of two serial processes bit-rates. The first\n       * is the network bitrate provided by `bandwidth` and the second is the bitrate of\n       * the entire process after that - decryption, transmuxing, and appending - provided\n       * by `throughput`.\n       *\n       * Since the two process are serial, the overall system bandwidth is given by:\n       *   sysBandwidth = 1 / (1 / bandwidth + 1 / throughput)\n       */\n      systemBandwidth: {\n        get: function get() {\n          var invBandwidth = 1 / (this.bandwidth || 1);\n          var invThroughput;\n\n          if (this.throughput > 0) {\n            invThroughput = 1 / this.throughput;\n          } else {\n            invThroughput = 0;\n          }\n\n          var systemBitrate = Math.floor(1 / (invBandwidth + invThroughput));\n          return systemBitrate;\n        },\n        set: function set() {\n          videojs.log.error('The \"systemBandwidth\" property is read-only');\n        }\n      }\n    });\n\n    if (this.options_.bandwidth) {\n      this.bandwidth = this.options_.bandwidth;\n    }\n\n    if (this.options_.throughput) {\n      this.throughput = this.options_.throughput;\n    }\n\n    Object.defineProperties(this.stats, {\n      bandwidth: {\n        get: function get() {\n          return _this3.bandwidth || 0;\n        },\n        enumerable: true\n      },\n      mediaRequests: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mediaRequests_() || 0;\n        },\n        enumerable: true\n      },\n      mediaRequestsAborted: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mediaRequestsAborted_() || 0;\n        },\n        enumerable: true\n      },\n      mediaRequestsTimedout: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mediaRequestsTimedout_() || 0;\n        },\n        enumerable: true\n      },\n      mediaRequestsErrored: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mediaRequestsErrored_() || 0;\n        },\n        enumerable: true\n      },\n      mediaTransferDuration: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mediaTransferDuration_() || 0;\n        },\n        enumerable: true\n      },\n      mediaBytesTransferred: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mediaBytesTransferred_() || 0;\n        },\n        enumerable: true\n      },\n      mediaSecondsLoaded: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mediaSecondsLoaded_() || 0;\n        },\n        enumerable: true\n      },\n      mediaAppends: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mediaAppends_() || 0;\n        },\n        enumerable: true\n      },\n      mainAppendsToLoadedData: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mainAppendsToLoadedData_() || 0;\n        },\n        enumerable: true\n      },\n      audioAppendsToLoadedData: {\n        get: function get() {\n          return _this3.masterPlaylistController_.audioAppendsToLoadedData_() || 0;\n        },\n        enumerable: true\n      },\n      appendsToLoadedData: {\n        get: function get() {\n          return _this3.masterPlaylistController_.appendsToLoadedData_() || 0;\n        },\n        enumerable: true\n      },\n      timeToLoadedData: {\n        get: function get() {\n          return _this3.masterPlaylistController_.timeToLoadedData_() || 0;\n        },\n        enumerable: true\n      },\n      buffered: {\n        get: function get() {\n          return timeRangesToArray(_this3.tech_.buffered());\n        },\n        enumerable: true\n      },\n      currentTime: {\n        get: function get() {\n          return _this3.tech_.currentTime();\n        },\n        enumerable: true\n      },\n      currentSource: {\n        get: function get() {\n          return _this3.tech_.currentSource_;\n        },\n        enumerable: true\n      },\n      currentTech: {\n        get: function get() {\n          return _this3.tech_.name_;\n        },\n        enumerable: true\n      },\n      duration: {\n        get: function get() {\n          return _this3.tech_.duration();\n        },\n        enumerable: true\n      },\n      master: {\n        get: function get() {\n          return _this3.playlists.master;\n        },\n        enumerable: true\n      },\n      playerDimensions: {\n        get: function get() {\n          return _this3.tech_.currentDimensions();\n        },\n        enumerable: true\n      },\n      seekable: {\n        get: function get() {\n          return timeRangesToArray(_this3.tech_.seekable());\n        },\n        enumerable: true\n      },\n      timestamp: {\n        get: function get() {\n          return Date.now();\n        },\n        enumerable: true\n      },\n      videoPlaybackQuality: {\n        get: function get() {\n          return _this3.tech_.getVideoPlaybackQuality();\n        },\n        enumerable: true\n      }\n    });\n    this.tech_.one('canplay', this.masterPlaylistController_.setupFirstPlay.bind(this.masterPlaylistController_));\n    this.tech_.on('bandwidthupdate', function () {\n      if (_this3.options_.useBandwidthFromLocalStorage) {\n        updateVhsLocalStorage({\n          bandwidth: _this3.bandwidth,\n          throughput: Math.round(_this3.throughput)\n        });\n      }\n    });\n    this.masterPlaylistController_.on('selectedinitialmedia', function () {\n      // Add the manual rendition mix-in to VhsHandler\n      renditionSelectionMixin(_this3);\n    });\n    this.masterPlaylistController_.sourceUpdater_.on('createdsourcebuffers', function () {\n      _this3.setupEme_();\n    }); // the bandwidth of the primary segment loader is our best\n    // estimate of overall bandwidth\n\n    this.on(this.masterPlaylistController_, 'progress', function () {\n      this.tech_.trigger('progress');\n    }); // In the live case, we need to ignore the very first `seeking` event since\n    // that will be the result of the seek-to-live behavior\n\n    this.on(this.masterPlaylistController_, 'firstplay', function () {\n      this.ignoreNextSeekingEvent_ = true;\n    });\n    this.setupQualityLevels_(); // do nothing if the tech has been disposed already\n    // this can occur if someone sets the src in player.ready(), for instance\n\n    if (!this.tech_.el()) {\n      return;\n    }\n\n    this.mediaSourceUrl_ = window$1.URL.createObjectURL(this.masterPlaylistController_.mediaSource);\n    this.tech_.src(this.mediaSourceUrl_);\n  };\n\n  _proto.createKeySessions_ = function createKeySessions_() {\n    var _this4 = this;\n\n    var audioPlaylistLoader = this.masterPlaylistController_.mediaTypes_.AUDIO.activePlaylistLoader;\n    this.logger_('waiting for EME key session creation');\n    waitForKeySessionCreation({\n      player: this.player_,\n      sourceKeySystems: this.source_.keySystems,\n      audioMedia: audioPlaylistLoader && audioPlaylistLoader.media(),\n      mainPlaylists: this.playlists.master.playlists\n    }).then(function () {\n      _this4.logger_('created EME key session');\n\n      _this4.masterPlaylistController_.sourceUpdater_.initializedEme();\n    })[\"catch\"](function (err) {\n      _this4.logger_('error while creating EME key session', err);\n\n      _this4.player_.error({\n        message: 'Failed to initialize media keys for EME',\n        code: 3\n      });\n    });\n  };\n\n  _proto.handleWaitingForKey_ = function handleWaitingForKey_() {\n    // If waitingforkey is fired, it's possible that the data that's necessary to retrieve\n    // the key is in the manifest. While this should've happened on initial source load, it\n    // may happen again in live streams where the keys change, and the manifest info\n    // reflects the update.\n    //\n    // Because videojs-contrib-eme compares the PSSH data we send to that of PSSH data it's\n    // already requested keys for, we don't have to worry about this generating extraneous\n    // requests.\n    this.logger_('waitingforkey fired, attempting to create any new key sessions');\n    this.createKeySessions_();\n  }\n  /**\n   * If necessary and EME is available, sets up EME options and waits for key session\n   * creation.\n   *\n   * This function also updates the source updater so taht it can be used, as for some\n   * browsers, EME must be configured before content is appended (if appending unencrypted\n   * content before encrypted content).\n   */\n  ;\n\n  _proto.setupEme_ = function setupEme_() {\n    var _this5 = this;\n\n    var audioPlaylistLoader = this.masterPlaylistController_.mediaTypes_.AUDIO.activePlaylistLoader;\n    var didSetupEmeOptions = setupEmeOptions({\n      player: this.player_,\n      sourceKeySystems: this.source_.keySystems,\n      media: this.playlists.media(),\n      audioMedia: audioPlaylistLoader && audioPlaylistLoader.media()\n    });\n    this.player_.tech_.on('keystatuschange', function (e) {\n      if (e.status === 'output-restricted') {\n        _this5.masterPlaylistController_.blacklistCurrentPlaylist({\n          playlist: _this5.masterPlaylistController_.media(),\n          message: \"DRM keystatus changed to \" + e.status + \". Playlist will fail to play. Check for HDCP content.\",\n          blacklistDuration: Infinity\n        });\n      }\n    });\n    this.handleWaitingForKey_ = this.handleWaitingForKey_.bind(this);\n    this.player_.tech_.on('waitingforkey', this.handleWaitingForKey_); // In IE11 this is too early to initialize media keys, and IE11 does not support\n    // promises.\n\n    if (videojs.browser.IE_VERSION === 11 || !didSetupEmeOptions) {\n      // If EME options were not set up, we've done all we could to initialize EME.\n      this.masterPlaylistController_.sourceUpdater_.initializedEme();\n      return;\n    }\n\n    this.createKeySessions_();\n  }\n  /**\n   * Initializes the quality levels and sets listeners to update them.\n   *\n   * @method setupQualityLevels_\n   * @private\n   */\n  ;\n\n  _proto.setupQualityLevels_ = function setupQualityLevels_() {\n    var _this6 = this;\n\n    var player = videojs.players[this.tech_.options_.playerId]; // if there isn't a player or there isn't a qualityLevels plugin\n    // or qualityLevels_ listeners have already been setup, do nothing.\n\n    if (!player || !player.qualityLevels || this.qualityLevels_) {\n      return;\n    }\n\n    this.qualityLevels_ = player.qualityLevels();\n    this.masterPlaylistController_.on('selectedinitialmedia', function () {\n      handleVhsLoadedMetadata(_this6.qualityLevels_, _this6);\n    });\n    this.playlists.on('mediachange', function () {\n      handleVhsMediaChange(_this6.qualityLevels_, _this6.playlists);\n    });\n  }\n  /**\n   * return the version\n   */\n  ;\n\n  VhsHandler.version = function version$5() {\n    return {\n      '@videojs/http-streaming': version$4,\n      'mux.js': version$3,\n      'mpd-parser': version$2,\n      'm3u8-parser': version$1,\n      'aes-decrypter': version\n    };\n  }\n  /**\n   * return the version\n   */\n  ;\n\n  _proto.version = function version() {\n    return this.constructor.version();\n  };\n\n  _proto.canChangeType = function canChangeType() {\n    return SourceUpdater.canChangeType();\n  }\n  /**\n   * Begin playing the video.\n   */\n  ;\n\n  _proto.play = function play() {\n    this.masterPlaylistController_.play();\n  }\n  /**\n   * a wrapper around the function in MasterPlaylistController\n   */\n  ;\n\n  _proto.setCurrentTime = function setCurrentTime(currentTime) {\n    this.masterPlaylistController_.setCurrentTime(currentTime);\n  }\n  /**\n   * a wrapper around the function in MasterPlaylistController\n   */\n  ;\n\n  _proto.duration = function duration() {\n    return this.masterPlaylistController_.duration();\n  }\n  /**\n   * a wrapper around the function in MasterPlaylistController\n   */\n  ;\n\n  _proto.seekable = function seekable() {\n    return this.masterPlaylistController_.seekable();\n  }\n  /**\n   * Abort all outstanding work and cleanup.\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    if (this.playbackWatcher_) {\n      this.playbackWatcher_.dispose();\n    }\n\n    if (this.masterPlaylistController_) {\n      this.masterPlaylistController_.dispose();\n    }\n\n    if (this.qualityLevels_) {\n      this.qualityLevels_.dispose();\n    }\n\n    if (this.player_) {\n      delete this.player_.vhs;\n      delete this.player_.dash;\n      delete this.player_.hls;\n    }\n\n    if (this.tech_ && this.tech_.vhs) {\n      delete this.tech_.vhs;\n    } // don't check this.tech_.hls as it will log a deprecated warning\n\n\n    if (this.tech_) {\n      delete this.tech_.hls;\n    }\n\n    if (this.mediaSourceUrl_ && window$1.URL.revokeObjectURL) {\n      window$1.URL.revokeObjectURL(this.mediaSourceUrl_);\n      this.mediaSourceUrl_ = null;\n    }\n\n    if (this.tech_) {\n      this.tech_.off('waitingforkey', this.handleWaitingForKey_);\n    }\n\n    _Component.prototype.dispose.call(this);\n  };\n\n  _proto.convertToProgramTime = function convertToProgramTime(time, callback) {\n    return getProgramTime({\n      playlist: this.masterPlaylistController_.media(),\n      time: time,\n      callback: callback\n    });\n  } // the player must be playing before calling this\n  ;\n\n  _proto.seekToProgramTime = function seekToProgramTime$1(programTime, callback, pauseAfterSeek, retryCount) {\n    if (pauseAfterSeek === void 0) {\n      pauseAfterSeek = true;\n    }\n\n    if (retryCount === void 0) {\n      retryCount = 2;\n    }\n\n    return seekToProgramTime({\n      programTime: programTime,\n      playlist: this.masterPlaylistController_.media(),\n      retryCount: retryCount,\n      pauseAfterSeek: pauseAfterSeek,\n      seekTo: this.options_.seekTo,\n      tech: this.options_.tech,\n      callback: callback\n    });\n  };\n\n  return VhsHandler;\n}(Component);\n/**\n * The Source Handler object, which informs video.js what additional\n * MIME types are supported and sets up playback. It is registered\n * automatically to the appropriate tech based on the capabilities of\n * the browser it is running in. It is not necessary to use or modify\n * this object in normal usage.\n */\n\n\nvar VhsSourceHandler = {\n  name: 'videojs-http-streaming',\n  VERSION: version$4,\n  canHandleSource: function canHandleSource(srcObj, options) {\n    if (options === void 0) {\n      options = {};\n    }\n\n    var localOptions = videojs.mergeOptions(videojs.options, options);\n    return VhsSourceHandler.canPlayType(srcObj.type, localOptions);\n  },\n  handleSource: function handleSource(source, tech, options) {\n    if (options === void 0) {\n      options = {};\n    }\n\n    var localOptions = videojs.mergeOptions(videojs.options, options);\n    tech.vhs = new VhsHandler(source, tech, localOptions);\n\n    if (!videojs.hasOwnProperty('hls')) {\n      Object.defineProperty(tech, 'hls', {\n        get: function get() {\n          videojs.log.warn('player.tech().hls is deprecated. Use player.tech().vhs instead.');\n          return tech.vhs;\n        },\n        configurable: true\n      });\n    }\n\n    tech.vhs.xhr = xhrFactory();\n    tech.vhs.src(source.src, source.type);\n    return tech.vhs;\n  },\n  canPlayType: function canPlayType(type, options) {\n    if (options === void 0) {\n      options = {};\n    }\n\n    var _videojs$mergeOptions = videojs.mergeOptions(videojs.options, options),\n        _videojs$mergeOptions2 = _videojs$mergeOptions.vhs;\n\n    _videojs$mergeOptions2 = _videojs$mergeOptions2 === void 0 ? {} : _videojs$mergeOptions2;\n    var _videojs$mergeOptions3 = _videojs$mergeOptions2.overrideNative,\n        overrideNative = _videojs$mergeOptions3 === void 0 ? !videojs.browser.IS_ANY_SAFARI : _videojs$mergeOptions3,\n        _videojs$mergeOptions4 = _videojs$mergeOptions.hls;\n    _videojs$mergeOptions4 = _videojs$mergeOptions4 === void 0 ? {} : _videojs$mergeOptions4;\n    var _videojs$mergeOptions5 = _videojs$mergeOptions4.overrideNative,\n        legacyOverrideNative = _videojs$mergeOptions5 === void 0 ? false : _videojs$mergeOptions5;\n    var supportedType = simpleTypeFromSourceType(type);\n    var canUseMsePlayback = supportedType && (!Vhs.supportsTypeNatively(supportedType) || legacyOverrideNative || overrideNative);\n    return canUseMsePlayback ? 'maybe' : '';\n  }\n};\n/**\n * Check to see if the native MediaSource object exists and supports\n * an MP4 container with both H.264 video and AAC-LC audio.\n *\n * @return {boolean} if  native media sources are supported\n */\n\nvar supportsNativeMediaSources = function supportsNativeMediaSources() {\n  return browserSupportsCodec('avc1.4d400d,mp4a.40.2');\n}; // register source handlers with the appropriate techs\n\n\nif (supportsNativeMediaSources()) {\n  videojs.getTech('Html5').registerSourceHandler(VhsSourceHandler, 0);\n}\n\nvideojs.VhsHandler = VhsHandler;\nObject.defineProperty(videojs, 'HlsHandler', {\n  get: function get() {\n    videojs.log.warn('videojs.HlsHandler is deprecated. Use videojs.VhsHandler instead.');\n    return VhsHandler;\n  },\n  configurable: true\n});\nvideojs.VhsSourceHandler = VhsSourceHandler;\nObject.defineProperty(videojs, 'HlsSourceHandler', {\n  get: function get() {\n    videojs.log.warn('videojs.HlsSourceHandler is deprecated. ' + 'Use videojs.VhsSourceHandler instead.');\n    return VhsSourceHandler;\n  },\n  configurable: true\n});\nvideojs.Vhs = Vhs;\nObject.defineProperty(videojs, 'Hls', {\n  get: function get() {\n    videojs.log.warn('videojs.Hls is deprecated. Use videojs.Vhs instead.');\n    return Vhs;\n  },\n  configurable: true\n});\n\nif (!videojs.use) {\n  videojs.registerComponent('Hls', Vhs);\n  videojs.registerComponent('Vhs', Vhs);\n}\n\nvideojs.options.vhs = videojs.options.vhs || {};\nvideojs.options.hls = videojs.options.hls || {};\n\nif (!videojs.getPlugin || !videojs.getPlugin('reloadSourceOnError')) {\n  var registerPlugin = videojs.registerPlugin || videojs.plugin;\n  registerPlugin('reloadSourceOnError', reloadSourceOnError);\n}\n\nexport default videojs;\n","import setPrototypeOf from \"./setPrototypeOf.js\";\nexport default function _inherits(subClass, superClass) {\n  if (typeof superClass !== \"function\" && superClass !== null) {\n    throw new TypeError(\"Super expression must either be null or a function\");\n  }\n\n  subClass.prototype = Object.create(superClass && superClass.prototype, {\n    constructor: {\n      value: subClass,\n      writable: true,\n      configurable: true\n    }\n  });\n  if (superClass) setPrototypeOf(subClass, superClass);\n}","/* videojs-hotkeys v0.2.27 - https://github.com/ctd1500/videojs-hotkeys */\n!function(e,t){\"undefined\"!=typeof window&&window.videojs?t(window.videojs):\"function\"==typeof define&&define.amd?define(\"videojs-hotkeys\",[\"video.js\"],function(e){return t(e.default||e)}):\"undefined\"!=typeof module&&module.exports&&(module.exports=t(require(\"video.js\")))}(0,function(e){\"use strict\";\"undefined\"!=typeof window&&(window.videojs_hotkeys={version:\"0.2.27\"});(e.registerPlugin||e.plugin)(\"hotkeys\",function(t){function n(e){return\"function\"==typeof s?s(e):s}function o(e){null!=e&&\"function\"==typeof e.then&&e.then(null,function(e){})}var r=this,u=r.el(),l=document,i={volumeStep:.1,seekStep:5,enableMute:!0,enableVolumeScroll:!0,enableHoverScroll:!1,enableFullscreen:!0,enableNumbers:!0,enableJogStyle:!1,alwaysCaptureHotkeys:!1,captureDocumentHotkeys:!1,documentHotkeysFocusElementFilter:function(){return!1},enableModifiersForNumbers:!0,enableInactiveFocus:!0,skipInitialFocus:!1,playPauseKey:function(e){return 32===e.which||179===e.which},rewindKey:function(e){return 37===e.which||177===e.which},forwardKey:function(e){return 39===e.which||176===e.which},volumeUpKey:function(e){return 38===e.which},volumeDownKey:function(e){return 40===e.which},muteKey:function(e){return 77===e.which},fullscreenKey:function(e){return 70===e.which},customKeys:{}},c=e.mergeOptions||e.util.mergeOptions,a=(t=c(i,t||{})).volumeStep,s=t.seekStep,m=t.enableMute,y=t.enableVolumeScroll,f=t.enableHoverScroll,v=t.enableFullscreen,d=t.enableNumbers,p=t.enableJogStyle,b=t.alwaysCaptureHotkeys,h=t.captureDocumentHotkeys,w=t.documentHotkeysFocusElementFilter,k=t.enableModifiersForNumbers,S=t.enableInactiveFocus,K=t.skipInitialFocus,F=e.VERSION;u.hasAttribute(\"tabIndex\")||u.setAttribute(\"tabIndex\",\"-1\"),u.style.outline=\"none\",!b&&r.autoplay()||K||r.one(\"play\",function(){u.focus()}),S&&r.on(\"userinactive\",function(){var e=function(){clearTimeout(t)},t=setTimeout(function(){r.off(\"useractive\",e);var t=l.activeElement,n=u.querySelector(\".vjs-control-bar\");t&&t.parentElement==n&&u.focus()},10);r.one(\"useractive\",e)}),r.on(\"play\",function(){var e=u.querySelector(\".iframeblocker\");e&&\"\"===e.style.display&&(e.style.display=\"block\",e.style.bottom=\"39px\")});var q=function(e){var i,c,s=e.which,y=e.preventDefault.bind(e),f=r.duration();if(r.controls()){var S=l.activeElement;if(b||h&&w(S)||S==u||S==u.querySelector(\".vjs-tech\")||S==u.querySelector(\".vjs-control-bar\")||S==u.querySelector(\".iframeblocker\"))switch(g(e,r)){case 1:y(),(b||h)&&e.stopPropagation(),r.paused()?o(r.play()):r.pause();break;case 2:i=!r.paused(),y(),i&&r.pause(),(c=r.currentTime()-n(e))<=0&&(c=0),r.currentTime(c),i&&o(r.play());break;case 3:i=!r.paused(),y(),i&&r.pause(),(c=r.currentTime()+n(e))>=f&&(c=i?f-.001:f),r.currentTime(c),i&&o(r.play());break;case 5:y(),p?(c=r.currentTime()-1,r.currentTime()<=1&&(c=0),r.currentTime(c)):r.volume(r.volume()-a);break;case 4:y(),p?((c=r.currentTime()+1)>=f&&(c=f),r.currentTime(c)):r.volume(r.volume()+a);break;case 6:m&&r.muted(!r.muted());break;case 7:v&&(r.isFullscreen()?r.exitFullscreen():r.requestFullscreen());break;default:if((s>47&&s<59||s>95&&s<106)&&(k||!(e.metaKey||e.ctrlKey||e.altKey))&&d){var K=48;s>95&&(K=96);var F=s-K;y(),r.currentTime(r.duration()*F*.1)}for(var q in t.customKeys){var j=t.customKeys[q];j&&j.key&&j.handler&&j.key(e)&&(y(),j.handler(r,t,e))}}}},j=!1,T=u.querySelector(\".vjs-volume-menu-button\")||u.querySelector(\".vjs-volume-panel\");null!=T&&(T.onmouseover=function(){j=!0},T.onmouseout=function(){j=!1});var E=function(e){if(f)t=0;else var t=l.activeElement;if(r.controls()&&(b||t==u||t==u.querySelector(\".vjs-tech\")||t==u.querySelector(\".iframeblocker\")||t==u.querySelector(\".vjs-control-bar\")||j)&&y){e=window.event||e;var n=Math.max(-1,Math.min(1,e.wheelDelta||-e.detail));e.preventDefault(),1==n?r.volume(r.volume()+a):-1==n&&r.volume(r.volume()-a)}},g=function(e,n){return t.playPauseKey(e,n)?1:t.rewindKey(e,n)?2:t.forwardKey(e,n)?3:t.volumeUpKey(e,n)?4:t.volumeDownKey(e,n)?5:t.muteKey(e,n)?6:t.fullscreenKey(e,n)?7:void 0};return r.on(\"keydown\",q),r.on(\"dblclick\",function(e){if(null!=F&&F<=\"7.1.0\"&&r.controls()){var t=e.relatedTarget||e.toElement||l.activeElement;t!=u&&t!=u.querySelector(\".vjs-tech\")&&t!=u.querySelector(\".iframeblocker\")||v&&(r.isFullscreen()?r.exitFullscreen():r.requestFullscreen())}}),r.on(\"mousewheel\",E),r.on(\"DOMMouseScroll\",E),h&&document.addEventListener(\"keydown\",function(e){q(e)}),this})});","/**\n * Copyright 2013 vtt.js Contributors\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n// Default exports for Node. Export the extended versions of VTTCue and\n// VTTRegion in Node since we likely want the capability to convert back and\n// forth between JSON. If we don't then it's not that big of a deal since we're\n// off browser.\n\nvar window = require('global/window');\n\nvar vttjs = module.exports = {\n  WebVTT: require(\"./vtt.js\"),\n  VTTCue: require(\"./vttcue.js\"),\n  VTTRegion: require(\"./vttregion.js\")\n};\n\nwindow.vttjs = vttjs;\nwindow.WebVTT = vttjs.WebVTT;\n\nvar cueShim = vttjs.VTTCue;\nvar regionShim = vttjs.VTTRegion;\nvar nativeVTTCue = window.VTTCue;\nvar nativeVTTRegion = window.VTTRegion;\n\nvttjs.shim = function() {\n  window.VTTCue = cueShim;\n  window.VTTRegion = regionShim;\n};\n\nvttjs.restore = function() {\n  window.VTTCue = nativeVTTCue;\n  window.VTTRegion = nativeVTTRegion;\n};\n\nif (!window.VTTCue) {\n  vttjs.shim();\n}\n","/**\n * Copyright 2013 vtt.js Contributors\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */\n/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */\nvar document = require('global/document');\n\nvar _objCreate = Object.create || (function() {\n  function F() {}\n  return function(o) {\n    if (arguments.length !== 1) {\n      throw new Error('Object.create shim only accepts one parameter.');\n    }\n    F.prototype = o;\n    return new F();\n  };\n})();\n\n// Creates a new ParserError object from an errorData object. The errorData\n// object should have default code and message properties. The default message\n// property can be overriden by passing in a message parameter.\n// See ParsingError.Errors below for acceptable errors.\nfunction ParsingError(errorData, message) {\n  this.name = \"ParsingError\";\n  this.code = errorData.code;\n  this.message = message || errorData.message;\n}\nParsingError.prototype = _objCreate(Error.prototype);\nParsingError.prototype.constructor = ParsingError;\n\n// ParsingError metadata for acceptable ParsingErrors.\nParsingError.Errors = {\n  BadSignature: {\n    code: 0,\n    message: \"Malformed WebVTT signature.\"\n  },\n  BadTimeStamp: {\n    code: 1,\n    message: \"Malformed time stamp.\"\n  }\n};\n\n// Try to parse input as a time stamp.\nfunction parseTimeStamp(input) {\n\n  function computeSeconds(h, m, s, f) {\n    return (h | 0) * 3600 + (m | 0) * 60 + (s | 0) + (f | 0) / 1000;\n  }\n\n  var m = input.match(/^(\\d+):(\\d{1,2})(:\\d{1,2})?\\.(\\d{3})/);\n  if (!m) {\n    return null;\n  }\n\n  if (m[3]) {\n    // Timestamp takes the form of [hours]:[minutes]:[seconds].[milliseconds]\n    return computeSeconds(m[1], m[2], m[3].replace(\":\", \"\"), m[4]);\n  } else if (m[1] > 59) {\n    // Timestamp takes the form of [hours]:[minutes].[milliseconds]\n    // First position is hours as it's over 59.\n    return computeSeconds(m[1], m[2], 0,  m[4]);\n  } else {\n    // Timestamp takes the form of [minutes]:[seconds].[milliseconds]\n    return computeSeconds(0, m[1], m[2], m[4]);\n  }\n}\n\n// A settings object holds key/value pairs and will ignore anything but the first\n// assignment to a specific key.\nfunction Settings() {\n  this.values = _objCreate(null);\n}\n\nSettings.prototype = {\n  // Only accept the first assignment to any key.\n  set: function(k, v) {\n    if (!this.get(k) && v !== \"\") {\n      this.values[k] = v;\n    }\n  },\n  // Return the value for a key, or a default value.\n  // If 'defaultKey' is passed then 'dflt' is assumed to be an object with\n  // a number of possible default values as properties where 'defaultKey' is\n  // the key of the property that will be chosen; otherwise it's assumed to be\n  // a single value.\n  get: function(k, dflt, defaultKey) {\n    if (defaultKey) {\n      return this.has(k) ? this.values[k] : dflt[defaultKey];\n    }\n    return this.has(k) ? this.values[k] : dflt;\n  },\n  // Check whether we have a value for a key.\n  has: function(k) {\n    return k in this.values;\n  },\n  // Accept a setting if its one of the given alternatives.\n  alt: function(k, v, a) {\n    for (var n = 0; n < a.length; ++n) {\n      if (v === a[n]) {\n        this.set(k, v);\n        break;\n      }\n    }\n  },\n  // Accept a setting if its a valid (signed) integer.\n  integer: function(k, v) {\n    if (/^-?\\d+$/.test(v)) { // integer\n      this.set(k, parseInt(v, 10));\n    }\n  },\n  // Accept a setting if its a valid percentage.\n  percent: function(k, v) {\n    var m;\n    if ((m = v.match(/^([\\d]{1,3})(\\.[\\d]*)?%$/))) {\n      v = parseFloat(v);\n      if (v >= 0 && v <= 100) {\n        this.set(k, v);\n        return true;\n      }\n    }\n    return false;\n  }\n};\n\n// Helper function to parse input into groups separated by 'groupDelim', and\n// interprete each group as a key/value pair separated by 'keyValueDelim'.\nfunction parseOptions(input, callback, keyValueDelim, groupDelim) {\n  var groups = groupDelim ? input.split(groupDelim) : [input];\n  for (var i in groups) {\n    if (typeof groups[i] !== \"string\") {\n      continue;\n    }\n    var kv = groups[i].split(keyValueDelim);\n    if (kv.length !== 2) {\n      continue;\n    }\n    var k = kv[0];\n    var v = kv[1];\n    callback(k, v);\n  }\n}\n\nfunction parseCue(input, cue, regionList) {\n  // Remember the original input if we need to throw an error.\n  var oInput = input;\n  // 4.1 WebVTT timestamp\n  function consumeTimeStamp() {\n    var ts = parseTimeStamp(input);\n    if (ts === null) {\n      throw new ParsingError(ParsingError.Errors.BadTimeStamp,\n                            \"Malformed timestamp: \" + oInput);\n    }\n    // Remove time stamp from input.\n    input = input.replace(/^[^\\sa-zA-Z-]+/, \"\");\n    return ts;\n  }\n\n  // 4.4.2 WebVTT cue settings\n  function consumeCueSettings(input, cue) {\n    var settings = new Settings();\n\n    parseOptions(input, function (k, v) {\n      switch (k) {\n      case \"region\":\n        // Find the last region we parsed with the same region id.\n        for (var i = regionList.length - 1; i >= 0; i--) {\n          if (regionList[i].id === v) {\n            settings.set(k, regionList[i].region);\n            break;\n          }\n        }\n        break;\n      case \"vertical\":\n        settings.alt(k, v, [\"rl\", \"lr\"]);\n        break;\n      case \"line\":\n        var vals = v.split(\",\"),\n            vals0 = vals[0];\n        settings.integer(k, vals0);\n        settings.percent(k, vals0) ? settings.set(\"snapToLines\", false) : null;\n        settings.alt(k, vals0, [\"auto\"]);\n        if (vals.length === 2) {\n          settings.alt(\"lineAlign\", vals[1], [\"start\", \"center\", \"end\"]);\n        }\n        break;\n      case \"position\":\n        vals = v.split(\",\");\n        settings.percent(k, vals[0]);\n        if (vals.length === 2) {\n          settings.alt(\"positionAlign\", vals[1], [\"start\", \"center\", \"end\"]);\n        }\n        break;\n      case \"size\":\n        settings.percent(k, v);\n        break;\n      case \"align\":\n        settings.alt(k, v, [\"start\", \"center\", \"end\", \"left\", \"right\"]);\n        break;\n      }\n    }, /:/, /\\s/);\n\n    // Apply default values for any missing fields.\n    cue.region = settings.get(\"region\", null);\n    cue.vertical = settings.get(\"vertical\", \"\");\n    try {\n      cue.line = settings.get(\"line\", \"auto\");\n    } catch (e) {}\n    cue.lineAlign = settings.get(\"lineAlign\", \"start\");\n    cue.snapToLines = settings.get(\"snapToLines\", true);\n    cue.size = settings.get(\"size\", 100);\n    // Safari still uses the old middle value and won't accept center\n    try {\n      cue.align = settings.get(\"align\", \"center\");\n    } catch (e) {\n      cue.align = settings.get(\"align\", \"middle\");\n    }\n    try {\n      cue.position = settings.get(\"position\", \"auto\");\n    } catch (e) {\n      cue.position = settings.get(\"position\", {\n        start: 0,\n        left: 0,\n        center: 50,\n        middle: 50,\n        end: 100,\n        right: 100\n      }, cue.align);\n    }\n\n\n    cue.positionAlign = settings.get(\"positionAlign\", {\n      start: \"start\",\n      left: \"start\",\n      center: \"center\",\n      middle: \"center\",\n      end: \"end\",\n      right: \"end\"\n    }, cue.align);\n  }\n\n  function skipWhitespace() {\n    input = input.replace(/^\\s+/, \"\");\n  }\n\n  // 4.1 WebVTT cue timings.\n  skipWhitespace();\n  cue.startTime = consumeTimeStamp();   // (1) collect cue start time\n  skipWhitespace();\n  if (input.substr(0, 3) !== \"-->\") {     // (3) next characters must match \"-->\"\n    throw new ParsingError(ParsingError.Errors.BadTimeStamp,\n                           \"Malformed time stamp (time stamps must be separated by '-->'): \" +\n                           oInput);\n  }\n  input = input.substr(3);\n  skipWhitespace();\n  cue.endTime = consumeTimeStamp();     // (5) collect cue end time\n\n  // 4.1 WebVTT cue settings list.\n  skipWhitespace();\n  consumeCueSettings(input, cue);\n}\n\n// When evaluating this file as part of a Webpack bundle for server\n// side rendering, `document` is an empty object.\nvar TEXTAREA_ELEMENT = document.createElement && document.createElement(\"textarea\");\n\nvar TAG_NAME = {\n  c: \"span\",\n  i: \"i\",\n  b: \"b\",\n  u: \"u\",\n  ruby: \"ruby\",\n  rt: \"rt\",\n  v: \"span\",\n  lang: \"span\"\n};\n\n// 5.1 default text color\n// 5.2 default text background color is equivalent to text color with bg_ prefix\nvar DEFAULT_COLOR_CLASS = {\n  white: 'rgba(255,255,255,1)',\n  lime: 'rgba(0,255,0,1)',\n  cyan: 'rgba(0,255,255,1)',\n  red: 'rgba(255,0,0,1)',\n  yellow: 'rgba(255,255,0,1)',\n  magenta: 'rgba(255,0,255,1)',\n  blue: 'rgba(0,0,255,1)',\n  black: 'rgba(0,0,0,1)'\n};\n\nvar TAG_ANNOTATION = {\n  v: \"title\",\n  lang: \"lang\"\n};\n\nvar NEEDS_PARENT = {\n  rt: \"ruby\"\n};\n\n// Parse content into a document fragment.\nfunction parseContent(window, input) {\n  function nextToken() {\n    // Check for end-of-string.\n    if (!input) {\n      return null;\n    }\n\n    // Consume 'n' characters from the input.\n    function consume(result) {\n      input = input.substr(result.length);\n      return result;\n    }\n\n    var m = input.match(/^([^<]*)(<[^>]*>?)?/);\n    // If there is some text before the next tag, return it, otherwise return\n    // the tag.\n    return consume(m[1] ? m[1] : m[2]);\n  }\n\n  function unescape(s) {\n    TEXTAREA_ELEMENT.innerHTML = s;\n    s = TEXTAREA_ELEMENT.textContent;\n    TEXTAREA_ELEMENT.textContent = \"\";\n    return s;\n  }\n\n  function shouldAdd(current, element) {\n    return !NEEDS_PARENT[element.localName] ||\n           NEEDS_PARENT[element.localName] === current.localName;\n  }\n\n  // Create an element for this tag.\n  function createElement(type, annotation) {\n    var tagName = TAG_NAME[type];\n    if (!tagName) {\n      return null;\n    }\n    var element = window.document.createElement(tagName);\n    var name = TAG_ANNOTATION[type];\n    if (name && annotation) {\n      element[name] = annotation.trim();\n    }\n    return element;\n  }\n\n  var rootDiv = window.document.createElement(\"div\"),\n      current = rootDiv,\n      t,\n      tagStack = [];\n\n  while ((t = nextToken()) !== null) {\n    if (t[0] === '<') {\n      if (t[1] === \"/\") {\n        // If the closing tag matches, move back up to the parent node.\n        if (tagStack.length &&\n            tagStack[tagStack.length - 1] === t.substr(2).replace(\">\", \"\")) {\n          tagStack.pop();\n          current = current.parentNode;\n        }\n        // Otherwise just ignore the end tag.\n        continue;\n      }\n      var ts = parseTimeStamp(t.substr(1, t.length - 2));\n      var node;\n      if (ts) {\n        // Timestamps are lead nodes as well.\n        node = window.document.createProcessingInstruction(\"timestamp\", ts);\n        current.appendChild(node);\n        continue;\n      }\n      var m = t.match(/^<([^.\\s/0-9>]+)(\\.[^\\s\\\\>]+)?([^>\\\\]+)?(\\\\?)>?$/);\n      // If we can't parse the tag, skip to the next tag.\n      if (!m) {\n        continue;\n      }\n      // Try to construct an element, and ignore the tag if we couldn't.\n      node = createElement(m[1], m[3]);\n      if (!node) {\n        continue;\n      }\n      // Determine if the tag should be added based on the context of where it\n      // is placed in the cuetext.\n      if (!shouldAdd(current, node)) {\n        continue;\n      }\n      // Set the class list (as a list of classes, separated by space).\n      if (m[2]) {\n        var classes = m[2].split('.');\n\n        classes.forEach(function(cl) {\n          var bgColor = /^bg_/.test(cl);\n          // slice out `bg_` if it's a background color\n          var colorName = bgColor ? cl.slice(3) : cl;\n\n          if (DEFAULT_COLOR_CLASS.hasOwnProperty(colorName)) {\n            var propName = bgColor ? 'background-color' : 'color';\n            var propValue = DEFAULT_COLOR_CLASS[colorName];\n\n            node.style[propName] = propValue;\n          }\n        });\n\n        node.className = classes.join(' ');\n      }\n      // Append the node to the current node, and enter the scope of the new\n      // node.\n      tagStack.push(m[1]);\n      current.appendChild(node);\n      current = node;\n      continue;\n    }\n\n    // Text nodes are leaf nodes.\n    current.appendChild(window.document.createTextNode(unescape(t)));\n  }\n\n  return rootDiv;\n}\n\n// This is a list of all the Unicode characters that have a strong\n// right-to-left category. What this means is that these characters are\n// written right-to-left for sure. It was generated by pulling all the strong\n// right-to-left characters out of the Unicode data table. That table can\n// found at: http://www.unicode.org/Public/UNIDATA/UnicodeData.txt\nvar strongRTLRanges = [[0x5be, 0x5be], [0x5c0, 0x5c0], [0x5c3, 0x5c3], [0x5c6, 0x5c6],\n [0x5d0, 0x5ea], [0x5f0, 0x5f4], [0x608, 0x608], [0x60b, 0x60b], [0x60d, 0x60d],\n [0x61b, 0x61b], [0x61e, 0x64a], [0x66d, 0x66f], [0x671, 0x6d5], [0x6e5, 0x6e6],\n [0x6ee, 0x6ef], [0x6fa, 0x70d], [0x70f, 0x710], [0x712, 0x72f], [0x74d, 0x7a5],\n [0x7b1, 0x7b1], [0x7c0, 0x7ea], [0x7f4, 0x7f5], [0x7fa, 0x7fa], [0x800, 0x815],\n [0x81a, 0x81a], [0x824, 0x824], [0x828, 0x828], [0x830, 0x83e], [0x840, 0x858],\n [0x85e, 0x85e], [0x8a0, 0x8a0], [0x8a2, 0x8ac], [0x200f, 0x200f],\n [0xfb1d, 0xfb1d], [0xfb1f, 0xfb28], [0xfb2a, 0xfb36], [0xfb38, 0xfb3c],\n [0xfb3e, 0xfb3e], [0xfb40, 0xfb41], [0xfb43, 0xfb44], [0xfb46, 0xfbc1],\n [0xfbd3, 0xfd3d], [0xfd50, 0xfd8f], [0xfd92, 0xfdc7], [0xfdf0, 0xfdfc],\n [0xfe70, 0xfe74], [0xfe76, 0xfefc], [0x10800, 0x10805], [0x10808, 0x10808],\n [0x1080a, 0x10835], [0x10837, 0x10838], [0x1083c, 0x1083c], [0x1083f, 0x10855],\n [0x10857, 0x1085f], [0x10900, 0x1091b], [0x10920, 0x10939], [0x1093f, 0x1093f],\n [0x10980, 0x109b7], [0x109be, 0x109bf], [0x10a00, 0x10a00], [0x10a10, 0x10a13],\n [0x10a15, 0x10a17], [0x10a19, 0x10a33], [0x10a40, 0x10a47], [0x10a50, 0x10a58],\n [0x10a60, 0x10a7f], [0x10b00, 0x10b35], [0x10b40, 0x10b55], [0x10b58, 0x10b72],\n [0x10b78, 0x10b7f], [0x10c00, 0x10c48], [0x1ee00, 0x1ee03], [0x1ee05, 0x1ee1f],\n [0x1ee21, 0x1ee22], [0x1ee24, 0x1ee24], [0x1ee27, 0x1ee27], [0x1ee29, 0x1ee32],\n [0x1ee34, 0x1ee37], [0x1ee39, 0x1ee39], [0x1ee3b, 0x1ee3b], [0x1ee42, 0x1ee42],\n [0x1ee47, 0x1ee47], [0x1ee49, 0x1ee49], [0x1ee4b, 0x1ee4b], [0x1ee4d, 0x1ee4f],\n [0x1ee51, 0x1ee52], [0x1ee54, 0x1ee54], [0x1ee57, 0x1ee57], [0x1ee59, 0x1ee59],\n [0x1ee5b, 0x1ee5b], [0x1ee5d, 0x1ee5d], [0x1ee5f, 0x1ee5f], [0x1ee61, 0x1ee62],\n [0x1ee64, 0x1ee64], [0x1ee67, 0x1ee6a], [0x1ee6c, 0x1ee72], [0x1ee74, 0x1ee77],\n [0x1ee79, 0x1ee7c], [0x1ee7e, 0x1ee7e], [0x1ee80, 0x1ee89], [0x1ee8b, 0x1ee9b],\n [0x1eea1, 0x1eea3], [0x1eea5, 0x1eea9], [0x1eeab, 0x1eebb], [0x10fffd, 0x10fffd]];\n\nfunction isStrongRTLChar(charCode) {\n  for (var i = 0; i < strongRTLRanges.length; i++) {\n    var currentRange = strongRTLRanges[i];\n    if (charCode >= currentRange[0] && charCode <= currentRange[1]) {\n      return true;\n    }\n  }\n\n  return false;\n}\n\nfunction determineBidi(cueDiv) {\n  var nodeStack = [],\n      text = \"\",\n      charCode;\n\n  if (!cueDiv || !cueDiv.childNodes) {\n    return \"ltr\";\n  }\n\n  function pushNodes(nodeStack, node) {\n    for (var i = node.childNodes.length - 1; i >= 0; i--) {\n      nodeStack.push(node.childNodes[i]);\n    }\n  }\n\n  function nextTextNode(nodeStack) {\n    if (!nodeStack || !nodeStack.length) {\n      return null;\n    }\n\n    var node = nodeStack.pop(),\n        text = node.textContent || node.innerText;\n    if (text) {\n      // TODO: This should match all unicode type B characters (paragraph\n      // separator characters). See issue #115.\n      var m = text.match(/^.*(\\n|\\r)/);\n      if (m) {\n        nodeStack.length = 0;\n        return m[0];\n      }\n      return text;\n    }\n    if (node.tagName === \"ruby\") {\n      return nextTextNode(nodeStack);\n    }\n    if (node.childNodes) {\n      pushNodes(nodeStack, node);\n      return nextTextNode(nodeStack);\n    }\n  }\n\n  pushNodes(nodeStack, cueDiv);\n  while ((text = nextTextNode(nodeStack))) {\n    for (var i = 0; i < text.length; i++) {\n      charCode = text.charCodeAt(i);\n      if (isStrongRTLChar(charCode)) {\n        return \"rtl\";\n      }\n    }\n  }\n  return \"ltr\";\n}\n\nfunction computeLinePos(cue) {\n  if (typeof cue.line === \"number\" &&\n      (cue.snapToLines || (cue.line >= 0 && cue.line <= 100))) {\n    return cue.line;\n  }\n  if (!cue.track || !cue.track.textTrackList ||\n      !cue.track.textTrackList.mediaElement) {\n    return -1;\n  }\n  var track = cue.track,\n      trackList = track.textTrackList,\n      count = 0;\n  for (var i = 0; i < trackList.length && trackList[i] !== track; i++) {\n    if (trackList[i].mode === \"showing\") {\n      count++;\n    }\n  }\n  return ++count * -1;\n}\n\nfunction StyleBox() {\n}\n\n// Apply styles to a div. If there is no div passed then it defaults to the\n// div on 'this'.\nStyleBox.prototype.applyStyles = function(styles, div) {\n  div = div || this.div;\n  for (var prop in styles) {\n    if (styles.hasOwnProperty(prop)) {\n      div.style[prop] = styles[prop];\n    }\n  }\n};\n\nStyleBox.prototype.formatStyle = function(val, unit) {\n  return val === 0 ? 0 : val + unit;\n};\n\n// Constructs the computed display state of the cue (a div). Places the div\n// into the overlay which should be a block level element (usually a div).\nfunction CueStyleBox(window, cue, styleOptions) {\n  StyleBox.call(this);\n  this.cue = cue;\n\n  // Parse our cue's text into a DOM tree rooted at 'cueDiv'. This div will\n  // have inline positioning and will function as the cue background box.\n  this.cueDiv = parseContent(window, cue.text);\n  var styles = {\n    color: \"rgba(255, 255, 255, 1)\",\n    backgroundColor:  \"rgba(0, 0, 0, 0.8)\",\n    position: \"relative\",\n    left: 0,\n    right: 0,\n    top: 0,\n    bottom: 0,\n    display: \"inline\",\n    writingMode: cue.vertical === \"\" ? \"horizontal-tb\"\n                                     : cue.vertical === \"lr\" ? \"vertical-lr\"\n                                                             : \"vertical-rl\",\n    unicodeBidi: \"plaintext\"\n  };\n\n  this.applyStyles(styles, this.cueDiv);\n\n  // Create an absolutely positioned div that will be used to position the cue\n  // div. Note, all WebVTT cue-setting alignments are equivalent to the CSS\n  // mirrors of them except middle instead of center on Safari.\n  this.div = window.document.createElement(\"div\");\n  styles = {\n    direction: determineBidi(this.cueDiv),\n    writingMode: cue.vertical === \"\" ? \"horizontal-tb\"\n                                     : cue.vertical === \"lr\" ? \"vertical-lr\"\n                                                             : \"vertical-rl\",\n    unicodeBidi: \"plaintext\",\n    textAlign: cue.align === \"middle\" ? \"center\" : cue.align,\n    font: styleOptions.font,\n    whiteSpace: \"pre-line\",\n    position: \"absolute\"\n  };\n\n  this.applyStyles(styles);\n  this.div.appendChild(this.cueDiv);\n\n  // Calculate the distance from the reference edge of the viewport to the text\n  // position of the cue box. The reference edge will be resolved later when\n  // the box orientation styles are applied.\n  var textPos = 0;\n  switch (cue.positionAlign) {\n  case \"start\":\n    textPos = cue.position;\n    break;\n  case \"center\":\n    textPos = cue.position - (cue.size / 2);\n    break;\n  case \"end\":\n    textPos = cue.position - cue.size;\n    break;\n  }\n\n  // Horizontal box orientation; textPos is the distance from the left edge of the\n  // area to the left edge of the box and cue.size is the distance extending to\n  // the right from there.\n  if (cue.vertical === \"\") {\n    this.applyStyles({\n      left:  this.formatStyle(textPos, \"%\"),\n      width: this.formatStyle(cue.size, \"%\")\n    });\n  // Vertical box orientation; textPos is the distance from the top edge of the\n  // area to the top edge of the box and cue.size is the height extending\n  // downwards from there.\n  } else {\n    this.applyStyles({\n      top: this.formatStyle(textPos, \"%\"),\n      height: this.formatStyle(cue.size, \"%\")\n    });\n  }\n\n  this.move = function(box) {\n    this.applyStyles({\n      top: this.formatStyle(box.top, \"px\"),\n      bottom: this.formatStyle(box.bottom, \"px\"),\n      left: this.formatStyle(box.left, \"px\"),\n      right: this.formatStyle(box.right, \"px\"),\n      height: this.formatStyle(box.height, \"px\"),\n      width: this.formatStyle(box.width, \"px\")\n    });\n  };\n}\nCueStyleBox.prototype = _objCreate(StyleBox.prototype);\nCueStyleBox.prototype.constructor = CueStyleBox;\n\n// Represents the co-ordinates of an Element in a way that we can easily\n// compute things with such as if it overlaps or intersects with another Element.\n// Can initialize it with either a StyleBox or another BoxPosition.\nfunction BoxPosition(obj) {\n  // Either a BoxPosition was passed in and we need to copy it, or a StyleBox\n  // was passed in and we need to copy the results of 'getBoundingClientRect'\n  // as the object returned is readonly. All co-ordinate values are in reference\n  // to the viewport origin (top left).\n  var lh, height, width, top;\n  if (obj.div) {\n    height = obj.div.offsetHeight;\n    width = obj.div.offsetWidth;\n    top = obj.div.offsetTop;\n\n    var rects = (rects = obj.div.childNodes) && (rects = rects[0]) &&\n                rects.getClientRects && rects.getClientRects();\n    obj = obj.div.getBoundingClientRect();\n    // In certain cases the outter div will be slightly larger then the sum of\n    // the inner div's lines. This could be due to bold text, etc, on some platforms.\n    // In this case we should get the average line height and use that. This will\n    // result in the desired behaviour.\n    lh = rects ? Math.max((rects[0] && rects[0].height) || 0, obj.height / rects.length)\n               : 0;\n\n  }\n  this.left = obj.left;\n  this.right = obj.right;\n  this.top = obj.top || top;\n  this.height = obj.height || height;\n  this.bottom = obj.bottom || (top + (obj.height || height));\n  this.width = obj.width || width;\n  this.lineHeight = lh !== undefined ? lh : obj.lineHeight;\n}\n\n// Move the box along a particular axis. Optionally pass in an amount to move\n// the box. If no amount is passed then the default is the line height of the\n// box.\nBoxPosition.prototype.move = function(axis, toMove) {\n  toMove = toMove !== undefined ? toMove : this.lineHeight;\n  switch (axis) {\n  case \"+x\":\n    this.left += toMove;\n    this.right += toMove;\n    break;\n  case \"-x\":\n    this.left -= toMove;\n    this.right -= toMove;\n    break;\n  case \"+y\":\n    this.top += toMove;\n    this.bottom += toMove;\n    break;\n  case \"-y\":\n    this.top -= toMove;\n    this.bottom -= toMove;\n    break;\n  }\n};\n\n// Check if this box overlaps another box, b2.\nBoxPosition.prototype.overlaps = function(b2) {\n  return this.left < b2.right &&\n         this.right > b2.left &&\n         this.top < b2.bottom &&\n         this.bottom > b2.top;\n};\n\n// Check if this box overlaps any other boxes in boxes.\nBoxPosition.prototype.overlapsAny = function(boxes) {\n  for (var i = 0; i < boxes.length; i++) {\n    if (this.overlaps(boxes[i])) {\n      return true;\n    }\n  }\n  return false;\n};\n\n// Check if this box is within another box.\nBoxPosition.prototype.within = function(container) {\n  return this.top >= container.top &&\n         this.bottom <= container.bottom &&\n         this.left >= container.left &&\n         this.right <= container.right;\n};\n\n// Check if this box is entirely within the container or it is overlapping\n// on the edge opposite of the axis direction passed. For example, if \"+x\" is\n// passed and the box is overlapping on the left edge of the container, then\n// return true.\nBoxPosition.prototype.overlapsOppositeAxis = function(container, axis) {\n  switch (axis) {\n  case \"+x\":\n    return this.left < container.left;\n  case \"-x\":\n    return this.right > container.right;\n  case \"+y\":\n    return this.top < container.top;\n  case \"-y\":\n    return this.bottom > container.bottom;\n  }\n};\n\n// Find the percentage of the area that this box is overlapping with another\n// box.\nBoxPosition.prototype.intersectPercentage = function(b2) {\n  var x = Math.max(0, Math.min(this.right, b2.right) - Math.max(this.left, b2.left)),\n      y = Math.max(0, Math.min(this.bottom, b2.bottom) - Math.max(this.top, b2.top)),\n      intersectArea = x * y;\n  return intersectArea / (this.height * this.width);\n};\n\n// Convert the positions from this box to CSS compatible positions using\n// the reference container's positions. This has to be done because this\n// box's positions are in reference to the viewport origin, whereas, CSS\n// values are in referecne to their respective edges.\nBoxPosition.prototype.toCSSCompatValues = function(reference) {\n  return {\n    top: this.top - reference.top,\n    bottom: reference.bottom - this.bottom,\n    left: this.left - reference.left,\n    right: reference.right - this.right,\n    height: this.height,\n    width: this.width\n  };\n};\n\n// Get an object that represents the box's position without anything extra.\n// Can pass a StyleBox, HTMLElement, or another BoxPositon.\nBoxPosition.getSimpleBoxPosition = function(obj) {\n  var height = obj.div ? obj.div.offsetHeight : obj.tagName ? obj.offsetHeight : 0;\n  var width = obj.div ? obj.div.offsetWidth : obj.tagName ? obj.offsetWidth : 0;\n  var top = obj.div ? obj.div.offsetTop : obj.tagName ? obj.offsetTop : 0;\n\n  obj = obj.div ? obj.div.getBoundingClientRect() :\n                obj.tagName ? obj.getBoundingClientRect() : obj;\n  var ret = {\n    left: obj.left,\n    right: obj.right,\n    top: obj.top || top,\n    height: obj.height || height,\n    bottom: obj.bottom || (top + (obj.height || height)),\n    width: obj.width || width\n  };\n  return ret;\n};\n\n// Move a StyleBox to its specified, or next best, position. The containerBox\n// is the box that contains the StyleBox, such as a div. boxPositions are\n// a list of other boxes that the styleBox can't overlap with.\nfunction moveBoxToLinePosition(window, styleBox, containerBox, boxPositions) {\n\n  // Find the best position for a cue box, b, on the video. The axis parameter\n  // is a list of axis, the order of which, it will move the box along. For example:\n  // Passing [\"+x\", \"-x\"] will move the box first along the x axis in the positive\n  // direction. If it doesn't find a good position for it there it will then move\n  // it along the x axis in the negative direction.\n  function findBestPosition(b, axis) {\n    var bestPosition,\n        specifiedPosition = new BoxPosition(b),\n        percentage = 1; // Highest possible so the first thing we get is better.\n\n    for (var i = 0; i < axis.length; i++) {\n      while (b.overlapsOppositeAxis(containerBox, axis[i]) ||\n             (b.within(containerBox) && b.overlapsAny(boxPositions))) {\n        b.move(axis[i]);\n      }\n      // We found a spot where we aren't overlapping anything. This is our\n      // best position.\n      if (b.within(containerBox)) {\n        return b;\n      }\n      var p = b.intersectPercentage(containerBox);\n      // If we're outside the container box less then we were on our last try\n      // then remember this position as the best position.\n      if (percentage > p) {\n        bestPosition = new BoxPosition(b);\n        percentage = p;\n      }\n      // Reset the box position to the specified position.\n      b = new BoxPosition(specifiedPosition);\n    }\n    return bestPosition || specifiedPosition;\n  }\n\n  var boxPosition = new BoxPosition(styleBox),\n      cue = styleBox.cue,\n      linePos = computeLinePos(cue),\n      axis = [];\n\n  // If we have a line number to align the cue to.\n  if (cue.snapToLines) {\n    var size;\n    switch (cue.vertical) {\n    case \"\":\n      axis = [ \"+y\", \"-y\" ];\n      size = \"height\";\n      break;\n    case \"rl\":\n      axis = [ \"+x\", \"-x\" ];\n      size = \"width\";\n      break;\n    case \"lr\":\n      axis = [ \"-x\", \"+x\" ];\n      size = \"width\";\n      break;\n    }\n\n    var step = boxPosition.lineHeight,\n        position = step * Math.round(linePos),\n        maxPosition = containerBox[size] + step,\n        initialAxis = axis[0];\n\n    // If the specified intial position is greater then the max position then\n    // clamp the box to the amount of steps it would take for the box to\n    // reach the max position.\n    if (Math.abs(position) > maxPosition) {\n      position = position < 0 ? -1 : 1;\n      position *= Math.ceil(maxPosition / step) * step;\n    }\n\n    // If computed line position returns negative then line numbers are\n    // relative to the bottom of the video instead of the top. Therefore, we\n    // need to increase our initial position by the length or width of the\n    // video, depending on the writing direction, and reverse our axis directions.\n    if (linePos < 0) {\n      position += cue.vertical === \"\" ? containerBox.height : containerBox.width;\n      axis = axis.reverse();\n    }\n\n    // Move the box to the specified position. This may not be its best\n    // position.\n    boxPosition.move(initialAxis, position);\n\n  } else {\n    // If we have a percentage line value for the cue.\n    var calculatedPercentage = (boxPosition.lineHeight / containerBox.height) * 100;\n\n    switch (cue.lineAlign) {\n    case \"center\":\n      linePos -= (calculatedPercentage / 2);\n      break;\n    case \"end\":\n      linePos -= calculatedPercentage;\n      break;\n    }\n\n    // Apply initial line position to the cue box.\n    switch (cue.vertical) {\n    case \"\":\n      styleBox.applyStyles({\n        top: styleBox.formatStyle(linePos, \"%\")\n      });\n      break;\n    case \"rl\":\n      styleBox.applyStyles({\n        left: styleBox.formatStyle(linePos, \"%\")\n      });\n      break;\n    case \"lr\":\n      styleBox.applyStyles({\n        right: styleBox.formatStyle(linePos, \"%\")\n      });\n      break;\n    }\n\n    axis = [ \"+y\", \"-x\", \"+x\", \"-y\" ];\n\n    // Get the box position again after we've applied the specified positioning\n    // to it.\n    boxPosition = new BoxPosition(styleBox);\n  }\n\n  var bestPosition = findBestPosition(boxPosition, axis);\n  styleBox.move(bestPosition.toCSSCompatValues(containerBox));\n}\n\nfunction WebVTT() {\n  // Nothing\n}\n\n// Helper to allow strings to be decoded instead of the default binary utf8 data.\nWebVTT.StringDecoder = function() {\n  return {\n    decode: function(data) {\n      if (!data) {\n        return \"\";\n      }\n      if (typeof data !== \"string\") {\n        throw new Error(\"Error - expected string data.\");\n      }\n      return decodeURIComponent(encodeURIComponent(data));\n    }\n  };\n};\n\nWebVTT.convertCueToDOMTree = function(window, cuetext) {\n  if (!window || !cuetext) {\n    return null;\n  }\n  return parseContent(window, cuetext);\n};\n\nvar FONT_SIZE_PERCENT = 0.05;\nvar FONT_STYLE = \"sans-serif\";\nvar CUE_BACKGROUND_PADDING = \"1.5%\";\n\n// Runs the processing model over the cues and regions passed to it.\n// @param overlay A block level element (usually a div) that the computed cues\n//                and regions will be placed into.\nWebVTT.processCues = function(window, cues, overlay) {\n  if (!window || !cues || !overlay) {\n    return null;\n  }\n\n  // Remove all previous children.\n  while (overlay.firstChild) {\n    overlay.removeChild(overlay.firstChild);\n  }\n\n  var paddedOverlay = window.document.createElement(\"div\");\n  paddedOverlay.style.position = \"absolute\";\n  paddedOverlay.style.left = \"0\";\n  paddedOverlay.style.right = \"0\";\n  paddedOverlay.style.top = \"0\";\n  paddedOverlay.style.bottom = \"0\";\n  paddedOverlay.style.margin = CUE_BACKGROUND_PADDING;\n  overlay.appendChild(paddedOverlay);\n\n  // Determine if we need to compute the display states of the cues. This could\n  // be the case if a cue's state has been changed since the last computation or\n  // if it has not been computed yet.\n  function shouldCompute(cues) {\n    for (var i = 0; i < cues.length; i++) {\n      if (cues[i].hasBeenReset || !cues[i].displayState) {\n        return true;\n      }\n    }\n    return false;\n  }\n\n  // We don't need to recompute the cues' display states. Just reuse them.\n  if (!shouldCompute(cues)) {\n    for (var i = 0; i < cues.length; i++) {\n      paddedOverlay.appendChild(cues[i].displayState);\n    }\n    return;\n  }\n\n  var boxPositions = [],\n      containerBox = BoxPosition.getSimpleBoxPosition(paddedOverlay),\n      fontSize = Math.round(containerBox.height * FONT_SIZE_PERCENT * 100) / 100;\n  var styleOptions = {\n    font: fontSize + \"px \" + FONT_STYLE\n  };\n\n  (function() {\n    var styleBox, cue;\n\n    for (var i = 0; i < cues.length; i++) {\n      cue = cues[i];\n\n      // Compute the intial position and styles of the cue div.\n      styleBox = new CueStyleBox(window, cue, styleOptions);\n      paddedOverlay.appendChild(styleBox.div);\n\n      // Move the cue div to it's correct line position.\n      moveBoxToLinePosition(window, styleBox, containerBox, boxPositions);\n\n      // Remember the computed div so that we don't have to recompute it later\n      // if we don't have too.\n      cue.displayState = styleBox.div;\n\n      boxPositions.push(BoxPosition.getSimpleBoxPosition(styleBox));\n    }\n  })();\n};\n\nWebVTT.Parser = function(window, vttjs, decoder) {\n  if (!decoder) {\n    decoder = vttjs;\n    vttjs = {};\n  }\n  if (!vttjs) {\n    vttjs = {};\n  }\n\n  this.window = window;\n  this.vttjs = vttjs;\n  this.state = \"INITIAL\";\n  this.buffer = \"\";\n  this.decoder = decoder || new TextDecoder(\"utf8\");\n  this.regionList = [];\n};\n\nWebVTT.Parser.prototype = {\n  // If the error is a ParsingError then report it to the consumer if\n  // possible. If it's not a ParsingError then throw it like normal.\n  reportOrThrowError: function(e) {\n    if (e instanceof ParsingError) {\n      this.onparsingerror && this.onparsingerror(e);\n    } else {\n      throw e;\n    }\n  },\n  parse: function (data) {\n    var self = this;\n\n    // If there is no data then we won't decode it, but will just try to parse\n    // whatever is in buffer already. This may occur in circumstances, for\n    // example when flush() is called.\n    if (data) {\n      // Try to decode the data that we received.\n      self.buffer += self.decoder.decode(data, {stream: true});\n    }\n\n    function collectNextLine() {\n      var buffer = self.buffer;\n      var pos = 0;\n      while (pos < buffer.length && buffer[pos] !== '\\r' && buffer[pos] !== '\\n') {\n        ++pos;\n      }\n      var line = buffer.substr(0, pos);\n      // Advance the buffer early in case we fail below.\n      if (buffer[pos] === '\\r') {\n        ++pos;\n      }\n      if (buffer[pos] === '\\n') {\n        ++pos;\n      }\n      self.buffer = buffer.substr(pos);\n      return line;\n    }\n\n    // 3.4 WebVTT region and WebVTT region settings syntax\n    function parseRegion(input) {\n      var settings = new Settings();\n\n      parseOptions(input, function (k, v) {\n        switch (k) {\n        case \"id\":\n          settings.set(k, v);\n          break;\n        case \"width\":\n          settings.percent(k, v);\n          break;\n        case \"lines\":\n          settings.integer(k, v);\n          break;\n        case \"regionanchor\":\n        case \"viewportanchor\":\n          var xy = v.split(',');\n          if (xy.length !== 2) {\n            break;\n          }\n          // We have to make sure both x and y parse, so use a temporary\n          // settings object here.\n          var anchor = new Settings();\n          anchor.percent(\"x\", xy[0]);\n          anchor.percent(\"y\", xy[1]);\n          if (!anchor.has(\"x\") || !anchor.has(\"y\")) {\n            break;\n          }\n          settings.set(k + \"X\", anchor.get(\"x\"));\n          settings.set(k + \"Y\", anchor.get(\"y\"));\n          break;\n        case \"scroll\":\n          settings.alt(k, v, [\"up\"]);\n          break;\n        }\n      }, /=/, /\\s/);\n\n      // Create the region, using default values for any values that were not\n      // specified.\n      if (settings.has(\"id\")) {\n        var region = new (self.vttjs.VTTRegion || self.window.VTTRegion)();\n        region.width = settings.get(\"width\", 100);\n        region.lines = settings.get(\"lines\", 3);\n        region.regionAnchorX = settings.get(\"regionanchorX\", 0);\n        region.regionAnchorY = settings.get(\"regionanchorY\", 100);\n        region.viewportAnchorX = settings.get(\"viewportanchorX\", 0);\n        region.viewportAnchorY = settings.get(\"viewportanchorY\", 100);\n        region.scroll = settings.get(\"scroll\", \"\");\n        // Register the region.\n        self.onregion && self.onregion(region);\n        // Remember the VTTRegion for later in case we parse any VTTCues that\n        // reference it.\n        self.regionList.push({\n          id: settings.get(\"id\"),\n          region: region\n        });\n      }\n    }\n\n    // draft-pantos-http-live-streaming-20\n    // https://tools.ietf.org/html/draft-pantos-http-live-streaming-20#section-3.5\n    // 3.5 WebVTT\n    function parseTimestampMap(input) {\n      var settings = new Settings();\n\n      parseOptions(input, function(k, v) {\n        switch(k) {\n        case \"MPEGT\":\n          settings.integer(k + 'S', v);\n          break;\n        case \"LOCA\":\n          settings.set(k + 'L', parseTimeStamp(v));\n          break;\n        }\n      }, /[^\\d]:/, /,/);\n\n      self.ontimestampmap && self.ontimestampmap({\n        \"MPEGTS\": settings.get(\"MPEGTS\"),\n        \"LOCAL\": settings.get(\"LOCAL\")\n      });\n    }\n\n    // 3.2 WebVTT metadata header syntax\n    function parseHeader(input) {\n      if (input.match(/X-TIMESTAMP-MAP/)) {\n        // This line contains HLS X-TIMESTAMP-MAP metadata\n        parseOptions(input, function(k, v) {\n          switch(k) {\n          case \"X-TIMESTAMP-MAP\":\n            parseTimestampMap(v);\n            break;\n          }\n        }, /=/);\n      } else {\n        parseOptions(input, function (k, v) {\n          switch (k) {\n          case \"Region\":\n            // 3.3 WebVTT region metadata header syntax\n            parseRegion(v);\n            break;\n          }\n        }, /:/);\n      }\n\n    }\n\n    // 5.1 WebVTT file parsing.\n    try {\n      var line;\n      if (self.state === \"INITIAL\") {\n        // We can't start parsing until we have the first line.\n        if (!/\\r\\n|\\n/.test(self.buffer)) {\n          return this;\n        }\n\n        line = collectNextLine();\n\n        var m = line.match(/^WEBVTT([ \\t].*)?$/);\n        if (!m || !m[0]) {\n          throw new ParsingError(ParsingError.Errors.BadSignature);\n        }\n\n        self.state = \"HEADER\";\n      }\n\n      var alreadyCollectedLine = false;\n      while (self.buffer) {\n        // We can't parse a line until we have the full line.\n        if (!/\\r\\n|\\n/.test(self.buffer)) {\n          return this;\n        }\n\n        if (!alreadyCollectedLine) {\n          line = collectNextLine();\n        } else {\n          alreadyCollectedLine = false;\n        }\n\n        switch (self.state) {\n        case \"HEADER\":\n          // 13-18 - Allow a header (metadata) under the WEBVTT line.\n          if (/:/.test(line)) {\n            parseHeader(line);\n          } else if (!line) {\n            // An empty line terminates the header and starts the body (cues).\n            self.state = \"ID\";\n          }\n          continue;\n        case \"NOTE\":\n          // Ignore NOTE blocks.\n          if (!line) {\n            self.state = \"ID\";\n          }\n          continue;\n        case \"ID\":\n          // Check for the start of NOTE blocks.\n          if (/^NOTE($|[ \\t])/.test(line)) {\n            self.state = \"NOTE\";\n            break;\n          }\n          // 19-29 - Allow any number of line terminators, then initialize new cue values.\n          if (!line) {\n            continue;\n          }\n          self.cue = new (self.vttjs.VTTCue || self.window.VTTCue)(0, 0, \"\");\n          // Safari still uses the old middle value and won't accept center\n          try {\n            self.cue.align = \"center\";\n          } catch (e) {\n            self.cue.align = \"middle\";\n          }\n          self.state = \"CUE\";\n          // 30-39 - Check if self line contains an optional identifier or timing data.\n          if (line.indexOf(\"-->\") === -1) {\n            self.cue.id = line;\n            continue;\n          }\n          // Process line as start of a cue.\n          /*falls through*/\n        case \"CUE\":\n          // 40 - Collect cue timings and settings.\n          try {\n            parseCue(line, self.cue, self.regionList);\n          } catch (e) {\n            self.reportOrThrowError(e);\n            // In case of an error ignore rest of the cue.\n            self.cue = null;\n            self.state = \"BADCUE\";\n            continue;\n          }\n          self.state = \"CUETEXT\";\n          continue;\n        case \"CUETEXT\":\n          var hasSubstring = line.indexOf(\"-->\") !== -1;\n          // 34 - If we have an empty line then report the cue.\n          // 35 - If we have the special substring '-->' then report the cue,\n          // but do not collect the line as we need to process the current\n          // one as a new cue.\n          if (!line || hasSubstring && (alreadyCollectedLine = true)) {\n            // We are done parsing self cue.\n            self.oncue && self.oncue(self.cue);\n            self.cue = null;\n            self.state = \"ID\";\n            continue;\n          }\n          if (self.cue.text) {\n            self.cue.text += \"\\n\";\n          }\n          self.cue.text += line.replace(/\\u2028/g, '\\n').replace(/u2029/g, '\\n');\n          continue;\n        case \"BADCUE\": // BADCUE\n          // 54-62 - Collect and discard the remaining cue.\n          if (!line) {\n            self.state = \"ID\";\n          }\n          continue;\n        }\n      }\n    } catch (e) {\n      self.reportOrThrowError(e);\n\n      // If we are currently parsing a cue, report what we have.\n      if (self.state === \"CUETEXT\" && self.cue && self.oncue) {\n        self.oncue(self.cue);\n      }\n      self.cue = null;\n      // Enter BADWEBVTT state if header was not parsed correctly otherwise\n      // another exception occurred so enter BADCUE state.\n      self.state = self.state === \"INITIAL\" ? \"BADWEBVTT\" : \"BADCUE\";\n    }\n    return this;\n  },\n  flush: function () {\n    var self = this;\n    try {\n      // Finish decoding the stream.\n      self.buffer += self.decoder.decode();\n      // Synthesize the end of the current cue or region.\n      if (self.cue || self.state === \"HEADER\") {\n        self.buffer += \"\\n\\n\";\n        self.parse();\n      }\n      // If we've flushed, parsed, and we're still on the INITIAL state then\n      // that means we don't have enough of the stream to parse the first\n      // line.\n      if (self.state === \"INITIAL\") {\n        throw new ParsingError(ParsingError.Errors.BadSignature);\n      }\n    } catch(e) {\n      self.reportOrThrowError(e);\n    }\n    self.onflush && self.onflush();\n    return this;\n  }\n};\n\nmodule.exports = WebVTT;\n","/**\n * Copyright 2013 vtt.js Contributors\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nvar autoKeyword = \"auto\";\nvar directionSetting = {\n  \"\": 1,\n  \"lr\": 1,\n  \"rl\": 1\n};\nvar alignSetting = {\n  \"start\": 1,\n  \"center\": 1,\n  \"end\": 1,\n  \"left\": 1,\n  \"right\": 1,\n  \"auto\": 1,\n  \"line-left\": 1,\n  \"line-right\": 1\n};\n\nfunction findDirectionSetting(value) {\n  if (typeof value !== \"string\") {\n    return false;\n  }\n  var dir = directionSetting[value.toLowerCase()];\n  return dir ? value.toLowerCase() : false;\n}\n\nfunction findAlignSetting(value) {\n  if (typeof value !== \"string\") {\n    return false;\n  }\n  var align = alignSetting[value.toLowerCase()];\n  return align ? value.toLowerCase() : false;\n}\n\nfunction VTTCue(startTime, endTime, text) {\n  /**\n   * Shim implementation specific properties. These properties are not in\n   * the spec.\n   */\n\n  // Lets us know when the VTTCue's data has changed in such a way that we need\n  // to recompute its display state. This lets us compute its display state\n  // lazily.\n  this.hasBeenReset = false;\n\n  /**\n   * VTTCue and TextTrackCue properties\n   * http://dev.w3.org/html5/webvtt/#vttcue-interface\n   */\n\n  var _id = \"\";\n  var _pauseOnExit = false;\n  var _startTime = startTime;\n  var _endTime = endTime;\n  var _text = text;\n  var _region = null;\n  var _vertical = \"\";\n  var _snapToLines = true;\n  var _line = \"auto\";\n  var _lineAlign = \"start\";\n  var _position = \"auto\";\n  var _positionAlign = \"auto\";\n  var _size = 100;\n  var _align = \"center\";\n\n  Object.defineProperties(this, {\n    \"id\": {\n      enumerable: true,\n      get: function() {\n        return _id;\n      },\n      set: function(value) {\n        _id = \"\" + value;\n      }\n    },\n\n    \"pauseOnExit\": {\n      enumerable: true,\n      get: function() {\n        return _pauseOnExit;\n      },\n      set: function(value) {\n        _pauseOnExit = !!value;\n      }\n    },\n\n    \"startTime\": {\n      enumerable: true,\n      get: function() {\n        return _startTime;\n      },\n      set: function(value) {\n        if (typeof value !== \"number\") {\n          throw new TypeError(\"Start time must be set to a number.\");\n        }\n        _startTime = value;\n        this.hasBeenReset = true;\n      }\n    },\n\n    \"endTime\": {\n      enumerable: true,\n      get: function() {\n        return _endTime;\n      },\n      set: function(value) {\n        if (typeof value !== \"number\") {\n          throw new TypeError(\"End time must be set to a number.\");\n        }\n        _endTime = value;\n        this.hasBeenReset = true;\n      }\n    },\n\n    \"text\": {\n      enumerable: true,\n      get: function() {\n        return _text;\n      },\n      set: function(value) {\n        _text = \"\" + value;\n        this.hasBeenReset = true;\n      }\n    },\n\n    \"region\": {\n      enumerable: true,\n      get: function() {\n        return _region;\n      },\n      set: function(value) {\n        _region = value;\n        this.hasBeenReset = true;\n      }\n    },\n\n    \"vertical\": {\n      enumerable: true,\n      get: function() {\n        return _vertical;\n      },\n      set: function(value) {\n        var setting = findDirectionSetting(value);\n        // Have to check for false because the setting an be an empty string.\n        if (setting === false) {\n          throw new SyntaxError(\"Vertical: an invalid or illegal direction string was specified.\");\n        }\n        _vertical = setting;\n        this.hasBeenReset = true;\n      }\n    },\n\n    \"snapToLines\": {\n      enumerable: true,\n      get: function() {\n        return _snapToLines;\n      },\n      set: function(value) {\n        _snapToLines = !!value;\n        this.hasBeenReset = true;\n      }\n    },\n\n    \"line\": {\n      enumerable: true,\n      get: function() {\n        return _line;\n      },\n      set: function(value) {\n        if (typeof value !== \"number\" && value !== autoKeyword) {\n          throw new SyntaxError(\"Line: an invalid number or illegal string was specified.\");\n        }\n        _line = value;\n        this.hasBeenReset = true;\n      }\n    },\n\n    \"lineAlign\": {\n      enumerable: true,\n      get: function() {\n        return _lineAlign;\n      },\n      set: function(value) {\n        var setting = findAlignSetting(value);\n        if (!setting) {\n          console.warn(\"lineAlign: an invalid or illegal string was specified.\");\n        } else {\n          _lineAlign = setting;\n          this.hasBeenReset = true;\n        }\n      }\n    },\n\n    \"position\": {\n      enumerable: true,\n      get: function() {\n        return _position;\n      },\n      set: function(value) {\n        if (value < 0 || value > 100) {\n          throw new Error(\"Position must be between 0 and 100.\");\n        }\n        _position = value;\n        this.hasBeenReset = true;\n      }\n    },\n\n    \"positionAlign\": {\n      enumerable: true,\n      get: function() {\n        return _positionAlign;\n      },\n      set: function(value) {\n        var setting = findAlignSetting(value);\n        if (!setting) {\n          console.warn(\"positionAlign: an invalid or illegal string was specified.\");\n        } else {\n          _positionAlign = setting;\n          this.hasBeenReset = true;\n        }\n      }\n    },\n\n    \"size\": {\n      enumerable: true,\n      get: function() {\n        return _size;\n      },\n      set: function(value) {\n        if (value < 0 || value > 100) {\n          throw new Error(\"Size must be between 0 and 100.\");\n        }\n        _size = value;\n        this.hasBeenReset = true;\n      }\n    },\n\n    \"align\": {\n      enumerable: true,\n      get: function() {\n        return _align;\n      },\n      set: function(value) {\n        var setting = findAlignSetting(value);\n        if (!setting) {\n          throw new SyntaxError(\"align: an invalid or illegal alignment string was specified.\");\n        }\n        _align = setting;\n        this.hasBeenReset = true;\n      }\n    }\n  });\n\n  /**\n   * Other <track> spec defined properties\n   */\n\n  // http://www.whatwg.org/specs/web-apps/current-work/multipage/the-video-element.html#text-track-cue-display-state\n  this.displayState = undefined;\n}\n\n/**\n * VTTCue methods\n */\n\nVTTCue.prototype.getCueAsHTML = function() {\n  // Assume WebVTT.convertCueToDOMTree is on the global.\n  return WebVTT.convertCueToDOMTree(window, this.text);\n};\n\nmodule.exports = VTTCue;\n","/**\n * Copyright 2013 vtt.js Contributors\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nvar scrollSetting = {\n  \"\": true,\n  \"up\": true\n};\n\nfunction findScrollSetting(value) {\n  if (typeof value !== \"string\") {\n    return false;\n  }\n  var scroll = scrollSetting[value.toLowerCase()];\n  return scroll ? value.toLowerCase() : false;\n}\n\nfunction isValidPercentValue(value) {\n  return typeof value === \"number\" && (value >= 0 && value <= 100);\n}\n\n// VTTRegion shim http://dev.w3.org/html5/webvtt/#vttregion-interface\nfunction VTTRegion() {\n  var _width = 100;\n  var _lines = 3;\n  var _regionAnchorX = 0;\n  var _regionAnchorY = 100;\n  var _viewportAnchorX = 0;\n  var _viewportAnchorY = 100;\n  var _scroll = \"\";\n\n  Object.defineProperties(this, {\n    \"width\": {\n      enumerable: true,\n      get: function() {\n        return _width;\n      },\n      set: function(value) {\n        if (!isValidPercentValue(value)) {\n          throw new Error(\"Width must be between 0 and 100.\");\n        }\n        _width = value;\n      }\n    },\n    \"lines\": {\n      enumerable: true,\n      get: function() {\n        return _lines;\n      },\n      set: function(value) {\n        if (typeof value !== \"number\") {\n          throw new TypeError(\"Lines must be set to a number.\");\n        }\n        _lines = value;\n      }\n    },\n    \"regionAnchorY\": {\n      enumerable: true,\n      get: function() {\n        return _regionAnchorY;\n      },\n      set: function(value) {\n        if (!isValidPercentValue(value)) {\n          throw new Error(\"RegionAnchorX must be between 0 and 100.\");\n        }\n        _regionAnchorY = value;\n      }\n    },\n    \"regionAnchorX\": {\n      enumerable: true,\n      get: function() {\n        return _regionAnchorX;\n      },\n      set: function(value) {\n        if(!isValidPercentValue(value)) {\n          throw new Error(\"RegionAnchorY must be between 0 and 100.\");\n        }\n        _regionAnchorX = value;\n      }\n    },\n    \"viewportAnchorY\": {\n      enumerable: true,\n      get: function() {\n        return _viewportAnchorY;\n      },\n      set: function(value) {\n        if (!isValidPercentValue(value)) {\n          throw new Error(\"ViewportAnchorY must be between 0 and 100.\");\n        }\n        _viewportAnchorY = value;\n      }\n    },\n    \"viewportAnchorX\": {\n      enumerable: true,\n      get: function() {\n        return _viewportAnchorX;\n      },\n      set: function(value) {\n        if (!isValidPercentValue(value)) {\n          throw new Error(\"ViewportAnchorX must be between 0 and 100.\");\n        }\n        _viewportAnchorX = value;\n      }\n    },\n    \"scroll\": {\n      enumerable: true,\n      get: function() {\n        return _scroll;\n      },\n      set: function(value) {\n        var setting = findScrollSetting(value);\n        // Have to check for false as an empty string is a legal value.\n        if (setting === false) {\n          console.warn(\"Scroll: an invalid or illegal string was specified.\");\n        } else {\n          _scroll = setting;\n        }\n      }\n    }\n  });\n}\n\nmodule.exports = VTTRegion;\n","/*! @name videojs-xr @version 0.0.5 @license MIT */\nimport videojs from 'video.js';\nimport window$1 from 'global/window';\n\nfunction _inheritsLoose(subClass, superClass) {\n  subClass.prototype = Object.create(superClass.prototype);\n  subClass.prototype.constructor = subClass;\n\n  _setPrototypeOf(subClass, superClass);\n}\n\nfunction _setPrototypeOf(o, p) {\n  _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {\n    o.__proto__ = p;\n    return o;\n  };\n\n  return _setPrototypeOf(o, p);\n}\n\nfunction _assertThisInitialized(self) {\n  if (self === void 0) {\n    throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\");\n  }\n\n  return self;\n}\n\nvar version = \"0.0.5\";\n\nvar commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};\n\nfunction createCommonjsModule(fn, module) {\n\treturn module = { exports: {} }, fn(module, module.exports), module.exports;\n}\n\nvar _global = createCommonjsModule(function (module) {\n// https://github.com/zloirock/core-js/issues/86#issuecomment-115759028\nvar global = module.exports = typeof window != 'undefined' && window.Math == Math\n  ? window : typeof self != 'undefined' && self.Math == Math ? self\n  // eslint-disable-next-line no-new-func\n  : Function('return this')();\nif (typeof __g == 'number') __g = global; // eslint-disable-line no-undef\n});\n\nvar hasOwnProperty = {}.hasOwnProperty;\nvar _has = function (it, key) {\n  return hasOwnProperty.call(it, key);\n};\n\nvar _fails = function (exec) {\n  try {\n    return !!exec();\n  } catch (e) {\n    return true;\n  }\n};\n\n// Thank's IE8 for his funny defineProperty\nvar _descriptors = !_fails(function () {\n  return Object.defineProperty({}, 'a', { get: function () { return 7; } }).a != 7;\n});\n\nvar _core = createCommonjsModule(function (module) {\nvar core = module.exports = { version: '2.6.12' };\nif (typeof __e == 'number') __e = core; // eslint-disable-line no-undef\n});\nvar _core_1 = _core.version;\n\nvar _isObject = function (it) {\n  return typeof it === 'object' ? it !== null : typeof it === 'function';\n};\n\nvar _anObject = function (it) {\n  if (!_isObject(it)) throw TypeError(it + ' is not an object!');\n  return it;\n};\n\nvar document$1 = _global.document;\n// typeof document.createElement is 'object' in old IE\nvar is = _isObject(document$1) && _isObject(document$1.createElement);\nvar _domCreate = function (it) {\n  return is ? document$1.createElement(it) : {};\n};\n\nvar _ie8DomDefine = !_descriptors && !_fails(function () {\n  return Object.defineProperty(_domCreate('div'), 'a', { get: function () { return 7; } }).a != 7;\n});\n\n// 7.1.1 ToPrimitive(input [, PreferredType])\n\n// instead of the ES6 spec version, we didn't implement @@toPrimitive case\n// and the second argument - flag - preferred type is a string\nvar _toPrimitive = function (it, S) {\n  if (!_isObject(it)) return it;\n  var fn, val;\n  if (S && typeof (fn = it.toString) == 'function' && !_isObject(val = fn.call(it))) return val;\n  if (typeof (fn = it.valueOf) == 'function' && !_isObject(val = fn.call(it))) return val;\n  if (!S && typeof (fn = it.toString) == 'function' && !_isObject(val = fn.call(it))) return val;\n  throw TypeError(\"Can't convert object to primitive value\");\n};\n\nvar dP = Object.defineProperty;\n\nvar f = _descriptors ? Object.defineProperty : function defineProperty(O, P, Attributes) {\n  _anObject(O);\n  P = _toPrimitive(P, true);\n  _anObject(Attributes);\n  if (_ie8DomDefine) try {\n    return dP(O, P, Attributes);\n  } catch (e) { /* empty */ }\n  if ('get' in Attributes || 'set' in Attributes) throw TypeError('Accessors not supported!');\n  if ('value' in Attributes) O[P] = Attributes.value;\n  return O;\n};\n\nvar _objectDp = {\n\tf: f\n};\n\nvar _propertyDesc = function (bitmap, value) {\n  return {\n    enumerable: !(bitmap & 1),\n    configurable: !(bitmap & 2),\n    writable: !(bitmap & 4),\n    value: value\n  };\n};\n\nvar _hide = _descriptors ? function (object, key, value) {\n  return _objectDp.f(object, key, _propertyDesc(1, value));\n} : function (object, key, value) {\n  object[key] = value;\n  return object;\n};\n\nvar id = 0;\nvar px = Math.random();\nvar _uid = function (key) {\n  return 'Symbol('.concat(key === undefined ? '' : key, ')_', (++id + px).toString(36));\n};\n\nvar _library = false;\n\nvar _shared = createCommonjsModule(function (module) {\nvar SHARED = '__core-js_shared__';\nvar store = _global[SHARED] || (_global[SHARED] = {});\n\n(module.exports = function (key, value) {\n  return store[key] || (store[key] = value !== undefined ? value : {});\n})('versions', []).push({\n  version: _core.version,\n  mode:  'global',\n  copyright: '© 2020 Denis Pushkarev (zloirock.ru)'\n});\n});\n\nvar _functionToString = _shared('native-function-to-string', Function.toString);\n\nvar _redefine = createCommonjsModule(function (module) {\nvar SRC = _uid('src');\n\nvar TO_STRING = 'toString';\nvar TPL = ('' + _functionToString).split(TO_STRING);\n\n_core.inspectSource = function (it) {\n  return _functionToString.call(it);\n};\n\n(module.exports = function (O, key, val, safe) {\n  var isFunction = typeof val == 'function';\n  if (isFunction) _has(val, 'name') || _hide(val, 'name', key);\n  if (O[key] === val) return;\n  if (isFunction) _has(val, SRC) || _hide(val, SRC, O[key] ? '' + O[key] : TPL.join(String(key)));\n  if (O === _global) {\n    O[key] = val;\n  } else if (!safe) {\n    delete O[key];\n    _hide(O, key, val);\n  } else if (O[key]) {\n    O[key] = val;\n  } else {\n    _hide(O, key, val);\n  }\n// add fake Function#toString for correct work wrapped methods / constructors with methods like LoDash isNative\n})(Function.prototype, TO_STRING, function toString() {\n  return typeof this == 'function' && this[SRC] || _functionToString.call(this);\n});\n});\n\nvar _aFunction = function (it) {\n  if (typeof it != 'function') throw TypeError(it + ' is not a function!');\n  return it;\n};\n\n// optional / simple context binding\n\nvar _ctx = function (fn, that, length) {\n  _aFunction(fn);\n  if (that === undefined) return fn;\n  switch (length) {\n    case 1: return function (a) {\n      return fn.call(that, a);\n    };\n    case 2: return function (a, b) {\n      return fn.call(that, a, b);\n    };\n    case 3: return function (a, b, c) {\n      return fn.call(that, a, b, c);\n    };\n  }\n  return function (/* ...args */) {\n    return fn.apply(that, arguments);\n  };\n};\n\nvar PROTOTYPE = 'prototype';\n\nvar $export = function (type, name, source) {\n  var IS_FORCED = type & $export.F;\n  var IS_GLOBAL = type & $export.G;\n  var IS_STATIC = type & $export.S;\n  var IS_PROTO = type & $export.P;\n  var IS_BIND = type & $export.B;\n  var target = IS_GLOBAL ? _global : IS_STATIC ? _global[name] || (_global[name] = {}) : (_global[name] || {})[PROTOTYPE];\n  var exports = IS_GLOBAL ? _core : _core[name] || (_core[name] = {});\n  var expProto = exports[PROTOTYPE] || (exports[PROTOTYPE] = {});\n  var key, own, out, exp;\n  if (IS_GLOBAL) source = name;\n  for (key in source) {\n    // contains in native\n    own = !IS_FORCED && target && target[key] !== undefined;\n    // export native or passed\n    out = (own ? target : source)[key];\n    // bind timers to global for call from export context\n    exp = IS_BIND && own ? _ctx(out, _global) : IS_PROTO && typeof out == 'function' ? _ctx(Function.call, out) : out;\n    // extend global\n    if (target) _redefine(target, key, out, type & $export.U);\n    // export\n    if (exports[key] != out) _hide(exports, key, exp);\n    if (IS_PROTO && expProto[key] != out) expProto[key] = out;\n  }\n};\n_global.core = _core;\n// type bitmap\n$export.F = 1;   // forced\n$export.G = 2;   // global\n$export.S = 4;   // static\n$export.P = 8;   // proto\n$export.B = 16;  // bind\n$export.W = 32;  // wrap\n$export.U = 64;  // safe\n$export.R = 128; // real proto method for `library`\nvar _export = $export;\n\nvar _meta = createCommonjsModule(function (module) {\nvar META = _uid('meta');\n\n\nvar setDesc = _objectDp.f;\nvar id = 0;\nvar isExtensible = Object.isExtensible || function () {\n  return true;\n};\nvar FREEZE = !_fails(function () {\n  return isExtensible(Object.preventExtensions({}));\n});\nvar setMeta = function (it) {\n  setDesc(it, META, { value: {\n    i: 'O' + ++id, // object ID\n    w: {}          // weak collections IDs\n  } });\n};\nvar fastKey = function (it, create) {\n  // return primitive with prefix\n  if (!_isObject(it)) return typeof it == 'symbol' ? it : (typeof it == 'string' ? 'S' : 'P') + it;\n  if (!_has(it, META)) {\n    // can't set metadata to uncaught frozen object\n    if (!isExtensible(it)) return 'F';\n    // not necessary to add metadata\n    if (!create) return 'E';\n    // add missing metadata\n    setMeta(it);\n  // return object ID\n  } return it[META].i;\n};\nvar getWeak = function (it, create) {\n  if (!_has(it, META)) {\n    // can't set metadata to uncaught frozen object\n    if (!isExtensible(it)) return true;\n    // not necessary to add metadata\n    if (!create) return false;\n    // add missing metadata\n    setMeta(it);\n  // return hash weak collections IDs\n  } return it[META].w;\n};\n// add metadata on freeze-family methods calling\nvar onFreeze = function (it) {\n  if (FREEZE && meta.NEED && isExtensible(it) && !_has(it, META)) setMeta(it);\n  return it;\n};\nvar meta = module.exports = {\n  KEY: META,\n  NEED: false,\n  fastKey: fastKey,\n  getWeak: getWeak,\n  onFreeze: onFreeze\n};\n});\nvar _meta_1 = _meta.KEY;\nvar _meta_2 = _meta.NEED;\nvar _meta_3 = _meta.fastKey;\nvar _meta_4 = _meta.getWeak;\nvar _meta_5 = _meta.onFreeze;\n\nvar _wks = createCommonjsModule(function (module) {\nvar store = _shared('wks');\n\nvar Symbol = _global.Symbol;\nvar USE_SYMBOL = typeof Symbol == 'function';\n\nvar $exports = module.exports = function (name) {\n  return store[name] || (store[name] =\n    USE_SYMBOL && Symbol[name] || (USE_SYMBOL ? Symbol : _uid)('Symbol.' + name));\n};\n\n$exports.store = store;\n});\n\nvar def = _objectDp.f;\n\nvar TAG = _wks('toStringTag');\n\nvar _setToStringTag = function (it, tag, stat) {\n  if (it && !_has(it = stat ? it : it.prototype, TAG)) def(it, TAG, { configurable: true, value: tag });\n};\n\nvar f$1 = _wks;\n\nvar _wksExt = {\n\tf: f$1\n};\n\nvar defineProperty = _objectDp.f;\nvar _wksDefine = function (name) {\n  var $Symbol = _core.Symbol || (_core.Symbol =  _global.Symbol || {});\n  if (name.charAt(0) != '_' && !(name in $Symbol)) defineProperty($Symbol, name, { value: _wksExt.f(name) });\n};\n\nvar toString = {}.toString;\n\nvar _cof = function (it) {\n  return toString.call(it).slice(8, -1);\n};\n\n// fallback for non-array-like ES3 and non-enumerable old V8 strings\n\n// eslint-disable-next-line no-prototype-builtins\nvar _iobject = Object('z').propertyIsEnumerable(0) ? Object : function (it) {\n  return _cof(it) == 'String' ? it.split('') : Object(it);\n};\n\n// 7.2.1 RequireObjectCoercible(argument)\nvar _defined = function (it) {\n  if (it == undefined) throw TypeError(\"Can't call method on  \" + it);\n  return it;\n};\n\n// to indexed object, toObject with fallback for non-array-like ES3 strings\n\n\nvar _toIobject = function (it) {\n  return _iobject(_defined(it));\n};\n\n// 7.1.4 ToInteger\nvar ceil = Math.ceil;\nvar floor = Math.floor;\nvar _toInteger = function (it) {\n  return isNaN(it = +it) ? 0 : (it > 0 ? floor : ceil)(it);\n};\n\n// 7.1.15 ToLength\n\nvar min = Math.min;\nvar _toLength = function (it) {\n  return it > 0 ? min(_toInteger(it), 0x1fffffffffffff) : 0; // pow(2, 53) - 1 == 9007199254740991\n};\n\nvar max = Math.max;\nvar min$1 = Math.min;\nvar _toAbsoluteIndex = function (index, length) {\n  index = _toInteger(index);\n  return index < 0 ? max(index + length, 0) : min$1(index, length);\n};\n\n// false -> Array#indexOf\n// true  -> Array#includes\n\n\n\nvar _arrayIncludes = function (IS_INCLUDES) {\n  return function ($this, el, fromIndex) {\n    var O = _toIobject($this);\n    var length = _toLength(O.length);\n    var index = _toAbsoluteIndex(fromIndex, length);\n    var value;\n    // Array#includes uses SameValueZero equality algorithm\n    // eslint-disable-next-line no-self-compare\n    if (IS_INCLUDES && el != el) while (length > index) {\n      value = O[index++];\n      // eslint-disable-next-line no-self-compare\n      if (value != value) return true;\n    // Array#indexOf ignores holes, Array#includes - not\n    } else for (;length > index; index++) if (IS_INCLUDES || index in O) {\n      if (O[index] === el) return IS_INCLUDES || index || 0;\n    } return !IS_INCLUDES && -1;\n  };\n};\n\nvar shared = _shared('keys');\n\nvar _sharedKey = function (key) {\n  return shared[key] || (shared[key] = _uid(key));\n};\n\nvar arrayIndexOf = _arrayIncludes(false);\nvar IE_PROTO = _sharedKey('IE_PROTO');\n\nvar _objectKeysInternal = function (object, names) {\n  var O = _toIobject(object);\n  var i = 0;\n  var result = [];\n  var key;\n  for (key in O) if (key != IE_PROTO) _has(O, key) && result.push(key);\n  // Don't enum bug & hidden keys\n  while (names.length > i) if (_has(O, key = names[i++])) {\n    ~arrayIndexOf(result, key) || result.push(key);\n  }\n  return result;\n};\n\n// IE 8- don't enum bug keys\nvar _enumBugKeys = (\n  'constructor,hasOwnProperty,isPrototypeOf,propertyIsEnumerable,toLocaleString,toString,valueOf'\n).split(',');\n\n// 19.1.2.14 / 15.2.3.14 Object.keys(O)\n\n\n\nvar _objectKeys = Object.keys || function keys(O) {\n  return _objectKeysInternal(O, _enumBugKeys);\n};\n\nvar f$2 = Object.getOwnPropertySymbols;\n\nvar _objectGops = {\n\tf: f$2\n};\n\nvar f$3 = {}.propertyIsEnumerable;\n\nvar _objectPie = {\n\tf: f$3\n};\n\n// all enumerable object keys, includes symbols\n\n\n\nvar _enumKeys = function (it) {\n  var result = _objectKeys(it);\n  var getSymbols = _objectGops.f;\n  if (getSymbols) {\n    var symbols = getSymbols(it);\n    var isEnum = _objectPie.f;\n    var i = 0;\n    var key;\n    while (symbols.length > i) if (isEnum.call(it, key = symbols[i++])) result.push(key);\n  } return result;\n};\n\n// 7.2.2 IsArray(argument)\n\nvar _isArray = Array.isArray || function isArray(arg) {\n  return _cof(arg) == 'Array';\n};\n\n// 7.1.13 ToObject(argument)\n\nvar _toObject = function (it) {\n  return Object(_defined(it));\n};\n\nvar _objectDps = _descriptors ? Object.defineProperties : function defineProperties(O, Properties) {\n  _anObject(O);\n  var keys = _objectKeys(Properties);\n  var length = keys.length;\n  var i = 0;\n  var P;\n  while (length > i) _objectDp.f(O, P = keys[i++], Properties[P]);\n  return O;\n};\n\nvar document$2 = _global.document;\nvar _html = document$2 && document$2.documentElement;\n\n// 19.1.2.2 / 15.2.3.5 Object.create(O [, Properties])\n\n\n\nvar IE_PROTO$1 = _sharedKey('IE_PROTO');\nvar Empty = function () { /* empty */ };\nvar PROTOTYPE$1 = 'prototype';\n\n// Create object with fake `null` prototype: use iframe Object with cleared prototype\nvar createDict = function () {\n  // Thrash, waste and sodomy: IE GC bug\n  var iframe = _domCreate('iframe');\n  var i = _enumBugKeys.length;\n  var lt = '<';\n  var gt = '>';\n  var iframeDocument;\n  iframe.style.display = 'none';\n  _html.appendChild(iframe);\n  iframe.src = 'javascript:'; // eslint-disable-line no-script-url\n  // createDict = iframe.contentWindow.Object;\n  // html.removeChild(iframe);\n  iframeDocument = iframe.contentWindow.document;\n  iframeDocument.open();\n  iframeDocument.write(lt + 'script' + gt + 'document.F=Object' + lt + '/script' + gt);\n  iframeDocument.close();\n  createDict = iframeDocument.F;\n  while (i--) delete createDict[PROTOTYPE$1][_enumBugKeys[i]];\n  return createDict();\n};\n\nvar _objectCreate = Object.create || function create(O, Properties) {\n  var result;\n  if (O !== null) {\n    Empty[PROTOTYPE$1] = _anObject(O);\n    result = new Empty();\n    Empty[PROTOTYPE$1] = null;\n    // add \"__proto__\" for Object.getPrototypeOf polyfill\n    result[IE_PROTO$1] = O;\n  } else result = createDict();\n  return Properties === undefined ? result : _objectDps(result, Properties);\n};\n\n// 19.1.2.7 / 15.2.3.4 Object.getOwnPropertyNames(O)\n\nvar hiddenKeys = _enumBugKeys.concat('length', 'prototype');\n\nvar f$4 = Object.getOwnPropertyNames || function getOwnPropertyNames(O) {\n  return _objectKeysInternal(O, hiddenKeys);\n};\n\nvar _objectGopn = {\n\tf: f$4\n};\n\n// fallback for IE11 buggy Object.getOwnPropertyNames with iframe and window\n\nvar gOPN = _objectGopn.f;\nvar toString$1 = {}.toString;\n\nvar windowNames = typeof window == 'object' && window && Object.getOwnPropertyNames\n  ? Object.getOwnPropertyNames(window) : [];\n\nvar getWindowNames = function (it) {\n  try {\n    return gOPN(it);\n  } catch (e) {\n    return windowNames.slice();\n  }\n};\n\nvar f$5 = function getOwnPropertyNames(it) {\n  return windowNames && toString$1.call(it) == '[object Window]' ? getWindowNames(it) : gOPN(_toIobject(it));\n};\n\nvar _objectGopnExt = {\n\tf: f$5\n};\n\nvar gOPD = Object.getOwnPropertyDescriptor;\n\nvar f$6 = _descriptors ? gOPD : function getOwnPropertyDescriptor(O, P) {\n  O = _toIobject(O);\n  P = _toPrimitive(P, true);\n  if (_ie8DomDefine) try {\n    return gOPD(O, P);\n  } catch (e) { /* empty */ }\n  if (_has(O, P)) return _propertyDesc(!_objectPie.f.call(O, P), O[P]);\n};\n\nvar _objectGopd = {\n\tf: f$6\n};\n\n// ECMAScript 6 symbols shim\n\n\n\n\n\nvar META = _meta.KEY;\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nvar gOPD$1 = _objectGopd.f;\nvar dP$1 = _objectDp.f;\nvar gOPN$1 = _objectGopnExt.f;\nvar $Symbol = _global.Symbol;\nvar $JSON = _global.JSON;\nvar _stringify = $JSON && $JSON.stringify;\nvar PROTOTYPE$2 = 'prototype';\nvar HIDDEN = _wks('_hidden');\nvar TO_PRIMITIVE = _wks('toPrimitive');\nvar isEnum = {}.propertyIsEnumerable;\nvar SymbolRegistry = _shared('symbol-registry');\nvar AllSymbols = _shared('symbols');\nvar OPSymbols = _shared('op-symbols');\nvar ObjectProto = Object[PROTOTYPE$2];\nvar USE_NATIVE = typeof $Symbol == 'function' && !!_objectGops.f;\nvar QObject = _global.QObject;\n// Don't use setters in Qt Script, https://github.com/zloirock/core-js/issues/173\nvar setter = !QObject || !QObject[PROTOTYPE$2] || !QObject[PROTOTYPE$2].findChild;\n\n// fallback for old Android, https://code.google.com/p/v8/issues/detail?id=687\nvar setSymbolDesc = _descriptors && _fails(function () {\n  return _objectCreate(dP$1({}, 'a', {\n    get: function () { return dP$1(this, 'a', { value: 7 }).a; }\n  })).a != 7;\n}) ? function (it, key, D) {\n  var protoDesc = gOPD$1(ObjectProto, key);\n  if (protoDesc) delete ObjectProto[key];\n  dP$1(it, key, D);\n  if (protoDesc && it !== ObjectProto) dP$1(ObjectProto, key, protoDesc);\n} : dP$1;\n\nvar wrap = function (tag) {\n  var sym = AllSymbols[tag] = _objectCreate($Symbol[PROTOTYPE$2]);\n  sym._k = tag;\n  return sym;\n};\n\nvar isSymbol = USE_NATIVE && typeof $Symbol.iterator == 'symbol' ? function (it) {\n  return typeof it == 'symbol';\n} : function (it) {\n  return it instanceof $Symbol;\n};\n\nvar $defineProperty = function defineProperty(it, key, D) {\n  if (it === ObjectProto) $defineProperty(OPSymbols, key, D);\n  _anObject(it);\n  key = _toPrimitive(key, true);\n  _anObject(D);\n  if (_has(AllSymbols, key)) {\n    if (!D.enumerable) {\n      if (!_has(it, HIDDEN)) dP$1(it, HIDDEN, _propertyDesc(1, {}));\n      it[HIDDEN][key] = true;\n    } else {\n      if (_has(it, HIDDEN) && it[HIDDEN][key]) it[HIDDEN][key] = false;\n      D = _objectCreate(D, { enumerable: _propertyDesc(0, false) });\n    } return setSymbolDesc(it, key, D);\n  } return dP$1(it, key, D);\n};\nvar $defineProperties = function defineProperties(it, P) {\n  _anObject(it);\n  var keys = _enumKeys(P = _toIobject(P));\n  var i = 0;\n  var l = keys.length;\n  var key;\n  while (l > i) $defineProperty(it, key = keys[i++], P[key]);\n  return it;\n};\nvar $create = function create(it, P) {\n  return P === undefined ? _objectCreate(it) : $defineProperties(_objectCreate(it), P);\n};\nvar $propertyIsEnumerable = function propertyIsEnumerable(key) {\n  var E = isEnum.call(this, key = _toPrimitive(key, true));\n  if (this === ObjectProto && _has(AllSymbols, key) && !_has(OPSymbols, key)) return false;\n  return E || !_has(this, key) || !_has(AllSymbols, key) || _has(this, HIDDEN) && this[HIDDEN][key] ? E : true;\n};\nvar $getOwnPropertyDescriptor = function getOwnPropertyDescriptor(it, key) {\n  it = _toIobject(it);\n  key = _toPrimitive(key, true);\n  if (it === ObjectProto && _has(AllSymbols, key) && !_has(OPSymbols, key)) return;\n  var D = gOPD$1(it, key);\n  if (D && _has(AllSymbols, key) && !(_has(it, HIDDEN) && it[HIDDEN][key])) D.enumerable = true;\n  return D;\n};\nvar $getOwnPropertyNames = function getOwnPropertyNames(it) {\n  var names = gOPN$1(_toIobject(it));\n  var result = [];\n  var i = 0;\n  var key;\n  while (names.length > i) {\n    if (!_has(AllSymbols, key = names[i++]) && key != HIDDEN && key != META) result.push(key);\n  } return result;\n};\nvar $getOwnPropertySymbols = function getOwnPropertySymbols(it) {\n  var IS_OP = it === ObjectProto;\n  var names = gOPN$1(IS_OP ? OPSymbols : _toIobject(it));\n  var result = [];\n  var i = 0;\n  var key;\n  while (names.length > i) {\n    if (_has(AllSymbols, key = names[i++]) && (IS_OP ? _has(ObjectProto, key) : true)) result.push(AllSymbols[key]);\n  } return result;\n};\n\n// 19.4.1.1 Symbol([description])\nif (!USE_NATIVE) {\n  $Symbol = function Symbol() {\n    if (this instanceof $Symbol) throw TypeError('Symbol is not a constructor!');\n    var tag = _uid(arguments.length > 0 ? arguments[0] : undefined);\n    var $set = function (value) {\n      if (this === ObjectProto) $set.call(OPSymbols, value);\n      if (_has(this, HIDDEN) && _has(this[HIDDEN], tag)) this[HIDDEN][tag] = false;\n      setSymbolDesc(this, tag, _propertyDesc(1, value));\n    };\n    if (_descriptors && setter) setSymbolDesc(ObjectProto, tag, { configurable: true, set: $set });\n    return wrap(tag);\n  };\n  _redefine($Symbol[PROTOTYPE$2], 'toString', function toString() {\n    return this._k;\n  });\n\n  _objectGopd.f = $getOwnPropertyDescriptor;\n  _objectDp.f = $defineProperty;\n  _objectGopn.f = _objectGopnExt.f = $getOwnPropertyNames;\n  _objectPie.f = $propertyIsEnumerable;\n  _objectGops.f = $getOwnPropertySymbols;\n\n  if (_descriptors && !_library) {\n    _redefine(ObjectProto, 'propertyIsEnumerable', $propertyIsEnumerable, true);\n  }\n\n  _wksExt.f = function (name) {\n    return wrap(_wks(name));\n  };\n}\n\n_export(_export.G + _export.W + _export.F * !USE_NATIVE, { Symbol: $Symbol });\n\nfor (var es6Symbols = (\n  // 19.4.2.2, 19.4.2.3, 19.4.2.4, 19.4.2.6, 19.4.2.8, 19.4.2.9, 19.4.2.10, 19.4.2.11, 19.4.2.12, 19.4.2.13, 19.4.2.14\n  'hasInstance,isConcatSpreadable,iterator,match,replace,search,species,split,toPrimitive,toStringTag,unscopables'\n).split(','), j = 0; es6Symbols.length > j;)_wks(es6Symbols[j++]);\n\nfor (var wellKnownSymbols = _objectKeys(_wks.store), k = 0; wellKnownSymbols.length > k;) _wksDefine(wellKnownSymbols[k++]);\n\n_export(_export.S + _export.F * !USE_NATIVE, 'Symbol', {\n  // 19.4.2.1 Symbol.for(key)\n  'for': function (key) {\n    return _has(SymbolRegistry, key += '')\n      ? SymbolRegistry[key]\n      : SymbolRegistry[key] = $Symbol(key);\n  },\n  // 19.4.2.5 Symbol.keyFor(sym)\n  keyFor: function keyFor(sym) {\n    if (!isSymbol(sym)) throw TypeError(sym + ' is not a symbol!');\n    for (var key in SymbolRegistry) if (SymbolRegistry[key] === sym) return key;\n  },\n  useSetter: function () { setter = true; },\n  useSimple: function () { setter = false; }\n});\n\n_export(_export.S + _export.F * !USE_NATIVE, 'Object', {\n  // 19.1.2.2 Object.create(O [, Properties])\n  create: $create,\n  // 19.1.2.4 Object.defineProperty(O, P, Attributes)\n  defineProperty: $defineProperty,\n  // 19.1.2.3 Object.defineProperties(O, Properties)\n  defineProperties: $defineProperties,\n  // 19.1.2.6 Object.getOwnPropertyDescriptor(O, P)\n  getOwnPropertyDescriptor: $getOwnPropertyDescriptor,\n  // 19.1.2.7 Object.getOwnPropertyNames(O)\n  getOwnPropertyNames: $getOwnPropertyNames,\n  // 19.1.2.8 Object.getOwnPropertySymbols(O)\n  getOwnPropertySymbols: $getOwnPropertySymbols\n});\n\n// Chrome 38 and 39 `Object.getOwnPropertySymbols` fails on primitives\n// https://bugs.chromium.org/p/v8/issues/detail?id=3443\nvar FAILS_ON_PRIMITIVES = _fails(function () { _objectGops.f(1); });\n\n_export(_export.S + _export.F * FAILS_ON_PRIMITIVES, 'Object', {\n  getOwnPropertySymbols: function getOwnPropertySymbols(it) {\n    return _objectGops.f(_toObject(it));\n  }\n});\n\n// 24.3.2 JSON.stringify(value [, replacer [, space]])\n$JSON && _export(_export.S + _export.F * (!USE_NATIVE || _fails(function () {\n  var S = $Symbol();\n  // MS Edge converts symbol values to JSON as {}\n  // WebKit converts symbol values to JSON as null\n  // V8 throws on boxed symbols\n  return _stringify([S]) != '[null]' || _stringify({ a: S }) != '{}' || _stringify(Object(S)) != '{}';\n})), 'JSON', {\n  stringify: function stringify(it) {\n    var args = [it];\n    var i = 1;\n    var replacer, $replacer;\n    while (arguments.length > i) args.push(arguments[i++]);\n    $replacer = replacer = args[1];\n    if (!_isObject(replacer) && it === undefined || isSymbol(it)) return; // IE8 returns string on undefined\n    if (!_isArray(replacer)) replacer = function (key, value) {\n      if (typeof $replacer == 'function') value = $replacer.call(this, key, value);\n      if (!isSymbol(value)) return value;\n    };\n    args[1] = replacer;\n    return _stringify.apply($JSON, args);\n  }\n});\n\n// 19.4.3.4 Symbol.prototype[@@toPrimitive](hint)\n$Symbol[PROTOTYPE$2][TO_PRIMITIVE] || _hide($Symbol[PROTOTYPE$2], TO_PRIMITIVE, $Symbol[PROTOTYPE$2].valueOf);\n// 19.4.3.5 Symbol.prototype[@@toStringTag]\n_setToStringTag($Symbol, 'Symbol');\n// 20.2.1.9 Math[@@toStringTag]\n_setToStringTag(Math, 'Math', true);\n// 24.3.3 JSON[@@toStringTag]\n_setToStringTag(_global.JSON, 'JSON', true);\n\n// 19.1.2.2 / 15.2.3.5 Object.create(O [, Properties])\n_export(_export.S, 'Object', { create: _objectCreate });\n\n// 19.1.2.4 / 15.2.3.6 Object.defineProperty(O, P, Attributes)\n_export(_export.S + _export.F * !_descriptors, 'Object', { defineProperty: _objectDp.f });\n\n// 19.1.2.3 / 15.2.3.7 Object.defineProperties(O, Properties)\n_export(_export.S + _export.F * !_descriptors, 'Object', { defineProperties: _objectDps });\n\n// most Object methods by ES6 should accept primitives\n\n\n\nvar _objectSap = function (KEY, exec) {\n  var fn = (_core.Object || {})[KEY] || Object[KEY];\n  var exp = {};\n  exp[KEY] = exec(fn);\n  _export(_export.S + _export.F * _fails(function () { fn(1); }), 'Object', exp);\n};\n\n// 19.1.2.6 Object.getOwnPropertyDescriptor(O, P)\n\nvar $getOwnPropertyDescriptor$1 = _objectGopd.f;\n\n_objectSap('getOwnPropertyDescriptor', function () {\n  return function getOwnPropertyDescriptor(it, key) {\n    return $getOwnPropertyDescriptor$1(_toIobject(it), key);\n  };\n});\n\n// 19.1.2.9 / 15.2.3.2 Object.getPrototypeOf(O)\n\n\nvar IE_PROTO$2 = _sharedKey('IE_PROTO');\nvar ObjectProto$1 = Object.prototype;\n\nvar _objectGpo = Object.getPrototypeOf || function (O) {\n  O = _toObject(O);\n  if (_has(O, IE_PROTO$2)) return O[IE_PROTO$2];\n  if (typeof O.constructor == 'function' && O instanceof O.constructor) {\n    return O.constructor.prototype;\n  } return O instanceof Object ? ObjectProto$1 : null;\n};\n\n// 19.1.2.9 Object.getPrototypeOf(O)\n\n\n\n_objectSap('getPrototypeOf', function () {\n  return function getPrototypeOf(it) {\n    return _objectGpo(_toObject(it));\n  };\n});\n\n// 19.1.2.14 Object.keys(O)\n\n\n\n_objectSap('keys', function () {\n  return function keys(it) {\n    return _objectKeys(_toObject(it));\n  };\n});\n\n// 19.1.2.7 Object.getOwnPropertyNames(O)\n_objectSap('getOwnPropertyNames', function () {\n  return _objectGopnExt.f;\n});\n\n// 19.1.2.5 Object.freeze(O)\n\nvar meta = _meta.onFreeze;\n\n_objectSap('freeze', function ($freeze) {\n  return function freeze(it) {\n    return $freeze && _isObject(it) ? $freeze(meta(it)) : it;\n  };\n});\n\n// 19.1.2.17 Object.seal(O)\n\nvar meta$1 = _meta.onFreeze;\n\n_objectSap('seal', function ($seal) {\n  return function seal(it) {\n    return $seal && _isObject(it) ? $seal(meta$1(it)) : it;\n  };\n});\n\n// 19.1.2.15 Object.preventExtensions(O)\n\nvar meta$2 = _meta.onFreeze;\n\n_objectSap('preventExtensions', function ($preventExtensions) {\n  return function preventExtensions(it) {\n    return $preventExtensions && _isObject(it) ? $preventExtensions(meta$2(it)) : it;\n  };\n});\n\n// 19.1.2.12 Object.isFrozen(O)\n\n\n_objectSap('isFrozen', function ($isFrozen) {\n  return function isFrozen(it) {\n    return _isObject(it) ? $isFrozen ? $isFrozen(it) : false : true;\n  };\n});\n\n// 19.1.2.13 Object.isSealed(O)\n\n\n_objectSap('isSealed', function ($isSealed) {\n  return function isSealed(it) {\n    return _isObject(it) ? $isSealed ? $isSealed(it) : false : true;\n  };\n});\n\n// 19.1.2.11 Object.isExtensible(O)\n\n\n_objectSap('isExtensible', function ($isExtensible) {\n  return function isExtensible(it) {\n    return _isObject(it) ? $isExtensible ? $isExtensible(it) : true : false;\n  };\n});\n\n// 19.1.2.1 Object.assign(target, source, ...)\n\n\n\n\n\n\nvar $assign = Object.assign;\n\n// should work with symbols and should have deterministic property order (V8 bug)\nvar _objectAssign = !$assign || _fails(function () {\n  var A = {};\n  var B = {};\n  // eslint-disable-next-line no-undef\n  var S = Symbol();\n  var K = 'abcdefghijklmnopqrst';\n  A[S] = 7;\n  K.split('').forEach(function (k) { B[k] = k; });\n  return $assign({}, A)[S] != 7 || Object.keys($assign({}, B)).join('') != K;\n}) ? function assign(target, source) { // eslint-disable-line no-unused-vars\n  var T = _toObject(target);\n  var aLen = arguments.length;\n  var index = 1;\n  var getSymbols = _objectGops.f;\n  var isEnum = _objectPie.f;\n  while (aLen > index) {\n    var S = _iobject(arguments[index++]);\n    var keys = getSymbols ? _objectKeys(S).concat(getSymbols(S)) : _objectKeys(S);\n    var length = keys.length;\n    var j = 0;\n    var key;\n    while (length > j) {\n      key = keys[j++];\n      if (!_descriptors || isEnum.call(S, key)) T[key] = S[key];\n    }\n  } return T;\n} : $assign;\n\n// 19.1.3.1 Object.assign(target, source)\n\n\n_export(_export.S + _export.F, 'Object', { assign: _objectAssign });\n\n// 7.2.9 SameValue(x, y)\nvar _sameValue = Object.is || function is(x, y) {\n  // eslint-disable-next-line no-self-compare\n  return x === y ? x !== 0 || 1 / x === 1 / y : x != x && y != y;\n};\n\n// 19.1.3.10 Object.is(value1, value2)\n\n_export(_export.S, 'Object', { is: _sameValue });\n\n// Works with __proto__ only. Old v8 can't work with null proto objects.\n/* eslint-disable no-proto */\n\n\nvar check = function (O, proto) {\n  _anObject(O);\n  if (!_isObject(proto) && proto !== null) throw TypeError(proto + \": can't set as prototype!\");\n};\nvar _setProto = {\n  set: Object.setPrototypeOf || ('__proto__' in {} ? // eslint-disable-line\n    function (test, buggy, set) {\n      try {\n        set = _ctx(Function.call, _objectGopd.f(Object.prototype, '__proto__').set, 2);\n        set(test, []);\n        buggy = !(test instanceof Array);\n      } catch (e) { buggy = true; }\n      return function setPrototypeOf(O, proto) {\n        check(O, proto);\n        if (buggy) O.__proto__ = proto;\n        else set(O, proto);\n        return O;\n      };\n    }({}, false) : undefined),\n  check: check\n};\n\n// 19.1.3.19 Object.setPrototypeOf(O, proto)\n\n_export(_export.S, 'Object', { setPrototypeOf: _setProto.set });\n\n// getting tag from 19.1.3.6 Object.prototype.toString()\n\nvar TAG$1 = _wks('toStringTag');\n// ES3 wrong here\nvar ARG = _cof(function () { return arguments; }()) == 'Arguments';\n\n// fallback for IE11 Script Access Denied error\nvar tryGet = function (it, key) {\n  try {\n    return it[key];\n  } catch (e) { /* empty */ }\n};\n\nvar _classof = function (it) {\n  var O, T, B;\n  return it === undefined ? 'Undefined' : it === null ? 'Null'\n    // @@toStringTag case\n    : typeof (T = tryGet(O = Object(it), TAG$1)) == 'string' ? T\n    // builtinTag case\n    : ARG ? _cof(O)\n    // ES3 arguments fallback\n    : (B = _cof(O)) == 'Object' && typeof O.callee == 'function' ? 'Arguments' : B;\n};\n\n// 19.1.3.6 Object.prototype.toString()\n\nvar test = {};\ntest[_wks('toStringTag')] = 'z';\nif (test + '' != '[object z]') {\n  _redefine(Object.prototype, 'toString', function toString() {\n    return '[object ' + _classof(this) + ']';\n  }, true);\n}\n\n// fast apply, http://jsperf.lnkit.com/fast-apply/5\nvar _invoke = function (fn, args, that) {\n  var un = that === undefined;\n  switch (args.length) {\n    case 0: return un ? fn()\n                      : fn.call(that);\n    case 1: return un ? fn(args[0])\n                      : fn.call(that, args[0]);\n    case 2: return un ? fn(args[0], args[1])\n                      : fn.call(that, args[0], args[1]);\n    case 3: return un ? fn(args[0], args[1], args[2])\n                      : fn.call(that, args[0], args[1], args[2]);\n    case 4: return un ? fn(args[0], args[1], args[2], args[3])\n                      : fn.call(that, args[0], args[1], args[2], args[3]);\n  } return fn.apply(that, args);\n};\n\nvar arraySlice = [].slice;\nvar factories = {};\n\nvar construct = function (F, len, args) {\n  if (!(len in factories)) {\n    for (var n = [], i = 0; i < len; i++) n[i] = 'a[' + i + ']';\n    // eslint-disable-next-line no-new-func\n    factories[len] = Function('F,a', 'return new F(' + n.join(',') + ')');\n  } return factories[len](F, args);\n};\n\nvar _bind = Function.bind || function bind(that /* , ...args */) {\n  var fn = _aFunction(this);\n  var partArgs = arraySlice.call(arguments, 1);\n  var bound = function (/* args... */) {\n    var args = partArgs.concat(arraySlice.call(arguments));\n    return this instanceof bound ? construct(fn, args.length, args) : _invoke(fn, args, that);\n  };\n  if (_isObject(fn.prototype)) bound.prototype = fn.prototype;\n  return bound;\n};\n\n// 19.2.3.2 / 15.3.4.5 Function.prototype.bind(thisArg, args...)\n\n\n_export(_export.P, 'Function', { bind: _bind });\n\nvar dP$2 = _objectDp.f;\nvar FProto = Function.prototype;\nvar nameRE = /^\\s*function ([^ (]*)/;\nvar NAME = 'name';\n\n// 19.2.4.2 name\nNAME in FProto || _descriptors && dP$2(FProto, NAME, {\n  configurable: true,\n  get: function () {\n    try {\n      return ('' + this).match(nameRE)[1];\n    } catch (e) {\n      return '';\n    }\n  }\n});\n\nvar HAS_INSTANCE = _wks('hasInstance');\nvar FunctionProto = Function.prototype;\n// 19.2.3.6 Function.prototype[@@hasInstance](V)\nif (!(HAS_INSTANCE in FunctionProto)) _objectDp.f(FunctionProto, HAS_INSTANCE, { value: function (O) {\n  if (typeof this != 'function' || !_isObject(O)) return false;\n  if (!_isObject(this.prototype)) return O instanceof this;\n  // for environment w/o native `@@hasInstance` logic enough `instanceof`, but add this:\n  while (O = _objectGpo(O)) if (this.prototype === O) return true;\n  return false;\n} });\n\nvar _stringWs = '\\x09\\x0A\\x0B\\x0C\\x0D\\x20\\xA0\\u1680\\u180E\\u2000\\u2001\\u2002\\u2003' +\n  '\\u2004\\u2005\\u2006\\u2007\\u2008\\u2009\\u200A\\u202F\\u205F\\u3000\\u2028\\u2029\\uFEFF';\n\nvar space = '[' + _stringWs + ']';\nvar non = '\\u200b\\u0085';\nvar ltrim = RegExp('^' + space + space + '*');\nvar rtrim = RegExp(space + space + '*$');\n\nvar exporter = function (KEY, exec, ALIAS) {\n  var exp = {};\n  var FORCE = _fails(function () {\n    return !!_stringWs[KEY]() || non[KEY]() != non;\n  });\n  var fn = exp[KEY] = FORCE ? exec(trim) : _stringWs[KEY];\n  if (ALIAS) exp[ALIAS] = fn;\n  _export(_export.P + _export.F * FORCE, 'String', exp);\n};\n\n// 1 -> String#trimLeft\n// 2 -> String#trimRight\n// 3 -> String#trim\nvar trim = exporter.trim = function (string, TYPE) {\n  string = String(_defined(string));\n  if (TYPE & 1) string = string.replace(ltrim, '');\n  if (TYPE & 2) string = string.replace(rtrim, '');\n  return string;\n};\n\nvar _stringTrim = exporter;\n\nvar $parseInt = _global.parseInt;\nvar $trim = _stringTrim.trim;\n\nvar hex = /^[-+]?0[xX]/;\n\nvar _parseInt = $parseInt(_stringWs + '08') !== 8 || $parseInt(_stringWs + '0x16') !== 22 ? function parseInt(str, radix) {\n  var string = $trim(String(str), 3);\n  return $parseInt(string, (radix >>> 0) || (hex.test(string) ? 16 : 10));\n} : $parseInt;\n\n// 18.2.5 parseInt(string, radix)\n_export(_export.G + _export.F * (parseInt != _parseInt), { parseInt: _parseInt });\n\nvar $parseFloat = _global.parseFloat;\nvar $trim$1 = _stringTrim.trim;\n\nvar _parseFloat = 1 / $parseFloat(_stringWs + '-0') !== -Infinity ? function parseFloat(str) {\n  var string = $trim$1(String(str), 3);\n  var result = $parseFloat(string);\n  return result === 0 && string.charAt(0) == '-' ? -0 : result;\n} : $parseFloat;\n\n// 18.2.4 parseFloat(string)\n_export(_export.G + _export.F * (parseFloat != _parseFloat), { parseFloat: _parseFloat });\n\nvar setPrototypeOf = _setProto.set;\nvar _inheritIfRequired = function (that, target, C) {\n  var S = target.constructor;\n  var P;\n  if (S !== C && typeof S == 'function' && (P = S.prototype) !== C.prototype && _isObject(P) && setPrototypeOf) {\n    setPrototypeOf(that, P);\n  } return that;\n};\n\nvar gOPN$2 = _objectGopn.f;\nvar gOPD$2 = _objectGopd.f;\nvar dP$3 = _objectDp.f;\nvar $trim$2 = _stringTrim.trim;\nvar NUMBER = 'Number';\nvar $Number = _global[NUMBER];\nvar Base = $Number;\nvar proto = $Number.prototype;\n// Opera ~12 has broken Object#toString\nvar BROKEN_COF = _cof(_objectCreate(proto)) == NUMBER;\nvar TRIM = 'trim' in String.prototype;\n\n// 7.1.3 ToNumber(argument)\nvar toNumber = function (argument) {\n  var it = _toPrimitive(argument, false);\n  if (typeof it == 'string' && it.length > 2) {\n    it = TRIM ? it.trim() : $trim$2(it, 3);\n    var first = it.charCodeAt(0);\n    var third, radix, maxCode;\n    if (first === 43 || first === 45) {\n      third = it.charCodeAt(2);\n      if (third === 88 || third === 120) return NaN; // Number('+0x1') should be NaN, old V8 fix\n    } else if (first === 48) {\n      switch (it.charCodeAt(1)) {\n        case 66: case 98: radix = 2; maxCode = 49; break; // fast equal /^0b[01]+$/i\n        case 79: case 111: radix = 8; maxCode = 55; break; // fast equal /^0o[0-7]+$/i\n        default: return +it;\n      }\n      for (var digits = it.slice(2), i = 0, l = digits.length, code; i < l; i++) {\n        code = digits.charCodeAt(i);\n        // parseInt parses a string to a first unavailable symbol\n        // but ToNumber should return NaN if a string contains unavailable symbols\n        if (code < 48 || code > maxCode) return NaN;\n      } return parseInt(digits, radix);\n    }\n  } return +it;\n};\n\nif (!$Number(' 0o1') || !$Number('0b1') || $Number('+0x1')) {\n  $Number = function Number(value) {\n    var it = arguments.length < 1 ? 0 : value;\n    var that = this;\n    return that instanceof $Number\n      // check on 1..constructor(foo) case\n      && (BROKEN_COF ? _fails(function () { proto.valueOf.call(that); }) : _cof(that) != NUMBER)\n        ? _inheritIfRequired(new Base(toNumber(it)), that, $Number) : toNumber(it);\n  };\n  for (var keys = _descriptors ? gOPN$2(Base) : (\n    // ES3:\n    'MAX_VALUE,MIN_VALUE,NaN,NEGATIVE_INFINITY,POSITIVE_INFINITY,' +\n    // ES6 (in case, if modules with ES6 Number statics required before):\n    'EPSILON,isFinite,isInteger,isNaN,isSafeInteger,MAX_SAFE_INTEGER,' +\n    'MIN_SAFE_INTEGER,parseFloat,parseInt,isInteger'\n  ).split(','), j$1 = 0, key; keys.length > j$1; j$1++) {\n    if (_has(Base, key = keys[j$1]) && !_has($Number, key)) {\n      dP$3($Number, key, gOPD$2(Base, key));\n    }\n  }\n  $Number.prototype = proto;\n  proto.constructor = $Number;\n  _redefine(_global, NUMBER, $Number);\n}\n\nvar _aNumberValue = function (it, msg) {\n  if (typeof it != 'number' && _cof(it) != 'Number') throw TypeError(msg);\n  return +it;\n};\n\nvar _stringRepeat = function repeat(count) {\n  var str = String(_defined(this));\n  var res = '';\n  var n = _toInteger(count);\n  if (n < 0 || n == Infinity) throw RangeError(\"Count can't be negative\");\n  for (;n > 0; (n >>>= 1) && (str += str)) if (n & 1) res += str;\n  return res;\n};\n\nvar $toFixed = 1.0.toFixed;\nvar floor$1 = Math.floor;\nvar data = [0, 0, 0, 0, 0, 0];\nvar ERROR = 'Number.toFixed: incorrect invocation!';\nvar ZERO = '0';\n\nvar multiply = function (n, c) {\n  var i = -1;\n  var c2 = c;\n  while (++i < 6) {\n    c2 += n * data[i];\n    data[i] = c2 % 1e7;\n    c2 = floor$1(c2 / 1e7);\n  }\n};\nvar divide = function (n) {\n  var i = 6;\n  var c = 0;\n  while (--i >= 0) {\n    c += data[i];\n    data[i] = floor$1(c / n);\n    c = (c % n) * 1e7;\n  }\n};\nvar numToString = function () {\n  var i = 6;\n  var s = '';\n  while (--i >= 0) {\n    if (s !== '' || i === 0 || data[i] !== 0) {\n      var t = String(data[i]);\n      s = s === '' ? t : s + _stringRepeat.call(ZERO, 7 - t.length) + t;\n    }\n  } return s;\n};\nvar pow = function (x, n, acc) {\n  return n === 0 ? acc : n % 2 === 1 ? pow(x, n - 1, acc * x) : pow(x * x, n / 2, acc);\n};\nvar log = function (x) {\n  var n = 0;\n  var x2 = x;\n  while (x2 >= 4096) {\n    n += 12;\n    x2 /= 4096;\n  }\n  while (x2 >= 2) {\n    n += 1;\n    x2 /= 2;\n  } return n;\n};\n\n_export(_export.P + _export.F * (!!$toFixed && (\n  0.00008.toFixed(3) !== '0.000' ||\n  0.9.toFixed(0) !== '1' ||\n  1.255.toFixed(2) !== '1.25' ||\n  1000000000000000128.0.toFixed(0) !== '1000000000000000128'\n) || !_fails(function () {\n  // V8 ~ Android 4.3-\n  $toFixed.call({});\n})), 'Number', {\n  toFixed: function toFixed(fractionDigits) {\n    var x = _aNumberValue(this, ERROR);\n    var f = _toInteger(fractionDigits);\n    var s = '';\n    var m = ZERO;\n    var e, z, j, k;\n    if (f < 0 || f > 20) throw RangeError(ERROR);\n    // eslint-disable-next-line no-self-compare\n    if (x != x) return 'NaN';\n    if (x <= -1e21 || x >= 1e21) return String(x);\n    if (x < 0) {\n      s = '-';\n      x = -x;\n    }\n    if (x > 1e-21) {\n      e = log(x * pow(2, 69, 1)) - 69;\n      z = e < 0 ? x * pow(2, -e, 1) : x / pow(2, e, 1);\n      z *= 0x10000000000000;\n      e = 52 - e;\n      if (e > 0) {\n        multiply(0, z);\n        j = f;\n        while (j >= 7) {\n          multiply(1e7, 0);\n          j -= 7;\n        }\n        multiply(pow(10, j, 1), 0);\n        j = e - 1;\n        while (j >= 23) {\n          divide(1 << 23);\n          j -= 23;\n        }\n        divide(1 << j);\n        multiply(1, 1);\n        divide(2);\n        m = numToString();\n      } else {\n        multiply(0, z);\n        multiply(1 << -e, 0);\n        m = numToString() + _stringRepeat.call(ZERO, f);\n      }\n    }\n    if (f > 0) {\n      k = m.length;\n      m = s + (k <= f ? '0.' + _stringRepeat.call(ZERO, f - k) + m : m.slice(0, k - f) + '.' + m.slice(k - f));\n    } else {\n      m = s + m;\n    } return m;\n  }\n});\n\nvar $toPrecision = 1.0.toPrecision;\n\n_export(_export.P + _export.F * (_fails(function () {\n  // IE7-\n  return $toPrecision.call(1, undefined) !== '1';\n}) || !_fails(function () {\n  // V8 ~ Android 4.3-\n  $toPrecision.call({});\n})), 'Number', {\n  toPrecision: function toPrecision(precision) {\n    var that = _aNumberValue(this, 'Number#toPrecision: incorrect invocation!');\n    return precision === undefined ? $toPrecision.call(that) : $toPrecision.call(that, precision);\n  }\n});\n\n// 20.1.2.1 Number.EPSILON\n\n\n_export(_export.S, 'Number', { EPSILON: Math.pow(2, -52) });\n\n// 20.1.2.2 Number.isFinite(number)\n\nvar _isFinite = _global.isFinite;\n\n_export(_export.S, 'Number', {\n  isFinite: function isFinite(it) {\n    return typeof it == 'number' && _isFinite(it);\n  }\n});\n\n// 20.1.2.3 Number.isInteger(number)\n\nvar floor$2 = Math.floor;\nvar _isInteger = function isInteger(it) {\n  return !_isObject(it) && isFinite(it) && floor$2(it) === it;\n};\n\n// 20.1.2.3 Number.isInteger(number)\n\n\n_export(_export.S, 'Number', { isInteger: _isInteger });\n\n// 20.1.2.4 Number.isNaN(number)\n\n\n_export(_export.S, 'Number', {\n  isNaN: function isNaN(number) {\n    // eslint-disable-next-line no-self-compare\n    return number != number;\n  }\n});\n\n// 20.1.2.5 Number.isSafeInteger(number)\n\n\nvar abs = Math.abs;\n\n_export(_export.S, 'Number', {\n  isSafeInteger: function isSafeInteger(number) {\n    return _isInteger(number) && abs(number) <= 0x1fffffffffffff;\n  }\n});\n\n// 20.1.2.6 Number.MAX_SAFE_INTEGER\n\n\n_export(_export.S, 'Number', { MAX_SAFE_INTEGER: 0x1fffffffffffff });\n\n// 20.1.2.10 Number.MIN_SAFE_INTEGER\n\n\n_export(_export.S, 'Number', { MIN_SAFE_INTEGER: -0x1fffffffffffff });\n\n// 20.1.2.12 Number.parseFloat(string)\n_export(_export.S + _export.F * (Number.parseFloat != _parseFloat), 'Number', { parseFloat: _parseFloat });\n\n// 20.1.2.13 Number.parseInt(string, radix)\n_export(_export.S + _export.F * (Number.parseInt != _parseInt), 'Number', { parseInt: _parseInt });\n\n// 20.2.2.20 Math.log1p(x)\nvar _mathLog1p = Math.log1p || function log1p(x) {\n  return (x = +x) > -1e-8 && x < 1e-8 ? x - x * x / 2 : Math.log(1 + x);\n};\n\n// 20.2.2.3 Math.acosh(x)\n\n\nvar sqrt = Math.sqrt;\nvar $acosh = Math.acosh;\n\n_export(_export.S + _export.F * !($acosh\n  // V8 bug: https://code.google.com/p/v8/issues/detail?id=3509\n  && Math.floor($acosh(Number.MAX_VALUE)) == 710\n  // Tor Browser bug: Math.acosh(Infinity) -> NaN\n  && $acosh(Infinity) == Infinity\n), 'Math', {\n  acosh: function acosh(x) {\n    return (x = +x) < 1 ? NaN : x > 94906265.62425156\n      ? Math.log(x) + Math.LN2\n      : _mathLog1p(x - 1 + sqrt(x - 1) * sqrt(x + 1));\n  }\n});\n\n// 20.2.2.5 Math.asinh(x)\n\nvar $asinh = Math.asinh;\n\nfunction asinh(x) {\n  return !isFinite(x = +x) || x == 0 ? x : x < 0 ? -asinh(-x) : Math.log(x + Math.sqrt(x * x + 1));\n}\n\n// Tor Browser bug: Math.asinh(0) -> -0\n_export(_export.S + _export.F * !($asinh && 1 / $asinh(0) > 0), 'Math', { asinh: asinh });\n\n// 20.2.2.7 Math.atanh(x)\n\nvar $atanh = Math.atanh;\n\n// Tor Browser bug: Math.atanh(-0) -> 0\n_export(_export.S + _export.F * !($atanh && 1 / $atanh(-0) < 0), 'Math', {\n  atanh: function atanh(x) {\n    return (x = +x) == 0 ? x : Math.log((1 + x) / (1 - x)) / 2;\n  }\n});\n\n// 20.2.2.28 Math.sign(x)\nvar _mathSign = Math.sign || function sign(x) {\n  // eslint-disable-next-line no-self-compare\n  return (x = +x) == 0 || x != x ? x : x < 0 ? -1 : 1;\n};\n\n// 20.2.2.9 Math.cbrt(x)\n\n\n\n_export(_export.S, 'Math', {\n  cbrt: function cbrt(x) {\n    return _mathSign(x = +x) * Math.pow(Math.abs(x), 1 / 3);\n  }\n});\n\n// 20.2.2.11 Math.clz32(x)\n\n\n_export(_export.S, 'Math', {\n  clz32: function clz32(x) {\n    return (x >>>= 0) ? 31 - Math.floor(Math.log(x + 0.5) * Math.LOG2E) : 32;\n  }\n});\n\n// 20.2.2.12 Math.cosh(x)\n\nvar exp = Math.exp;\n\n_export(_export.S, 'Math', {\n  cosh: function cosh(x) {\n    return (exp(x = +x) + exp(-x)) / 2;\n  }\n});\n\n// 20.2.2.14 Math.expm1(x)\nvar $expm1 = Math.expm1;\nvar _mathExpm1 = (!$expm1\n  // Old FF bug\n  || $expm1(10) > 22025.465794806719 || $expm1(10) < 22025.4657948067165168\n  // Tor Browser bug\n  || $expm1(-2e-17) != -2e-17\n) ? function expm1(x) {\n  return (x = +x) == 0 ? x : x > -1e-6 && x < 1e-6 ? x + x * x / 2 : Math.exp(x) - 1;\n} : $expm1;\n\n// 20.2.2.14 Math.expm1(x)\n\n\n\n_export(_export.S + _export.F * (_mathExpm1 != Math.expm1), 'Math', { expm1: _mathExpm1 });\n\n// 20.2.2.16 Math.fround(x)\n\nvar pow$1 = Math.pow;\nvar EPSILON = pow$1(2, -52);\nvar EPSILON32 = pow$1(2, -23);\nvar MAX32 = pow$1(2, 127) * (2 - EPSILON32);\nvar MIN32 = pow$1(2, -126);\n\nvar roundTiesToEven = function (n) {\n  return n + 1 / EPSILON - 1 / EPSILON;\n};\n\nvar _mathFround = Math.fround || function fround(x) {\n  var $abs = Math.abs(x);\n  var $sign = _mathSign(x);\n  var a, result;\n  if ($abs < MIN32) return $sign * roundTiesToEven($abs / MIN32 / EPSILON32) * MIN32 * EPSILON32;\n  a = (1 + EPSILON32 / EPSILON) * $abs;\n  result = a - (a - $abs);\n  // eslint-disable-next-line no-self-compare\n  if (result > MAX32 || result != result) return $sign * Infinity;\n  return $sign * result;\n};\n\n// 20.2.2.16 Math.fround(x)\n\n\n_export(_export.S, 'Math', { fround: _mathFround });\n\n// 20.2.2.17 Math.hypot([value1[, value2[, … ]]])\n\nvar abs$1 = Math.abs;\n\n_export(_export.S, 'Math', {\n  hypot: function hypot(value1, value2) { // eslint-disable-line no-unused-vars\n    var sum = 0;\n    var i = 0;\n    var aLen = arguments.length;\n    var larg = 0;\n    var arg, div;\n    while (i < aLen) {\n      arg = abs$1(arguments[i++]);\n      if (larg < arg) {\n        div = larg / arg;\n        sum = sum * div * div + 1;\n        larg = arg;\n      } else if (arg > 0) {\n        div = arg / larg;\n        sum += div * div;\n      } else sum += arg;\n    }\n    return larg === Infinity ? Infinity : larg * Math.sqrt(sum);\n  }\n});\n\n// 20.2.2.18 Math.imul(x, y)\n\nvar $imul = Math.imul;\n\n// some WebKit versions fails with big numbers, some has wrong arity\n_export(_export.S + _export.F * _fails(function () {\n  return $imul(0xffffffff, 5) != -5 || $imul.length != 2;\n}), 'Math', {\n  imul: function imul(x, y) {\n    var UINT16 = 0xffff;\n    var xn = +x;\n    var yn = +y;\n    var xl = UINT16 & xn;\n    var yl = UINT16 & yn;\n    return 0 | xl * yl + ((UINT16 & xn >>> 16) * yl + xl * (UINT16 & yn >>> 16) << 16 >>> 0);\n  }\n});\n\n// 20.2.2.21 Math.log10(x)\n\n\n_export(_export.S, 'Math', {\n  log10: function log10(x) {\n    return Math.log(x) * Math.LOG10E;\n  }\n});\n\n// 20.2.2.20 Math.log1p(x)\n\n\n_export(_export.S, 'Math', { log1p: _mathLog1p });\n\n// 20.2.2.22 Math.log2(x)\n\n\n_export(_export.S, 'Math', {\n  log2: function log2(x) {\n    return Math.log(x) / Math.LN2;\n  }\n});\n\n// 20.2.2.28 Math.sign(x)\n\n\n_export(_export.S, 'Math', { sign: _mathSign });\n\n// 20.2.2.30 Math.sinh(x)\n\n\nvar exp$1 = Math.exp;\n\n// V8 near Chromium 38 has a problem with very small numbers\n_export(_export.S + _export.F * _fails(function () {\n  return !Math.sinh(-2e-17) != -2e-17;\n}), 'Math', {\n  sinh: function sinh(x) {\n    return Math.abs(x = +x) < 1\n      ? (_mathExpm1(x) - _mathExpm1(-x)) / 2\n      : (exp$1(x - 1) - exp$1(-x - 1)) * (Math.E / 2);\n  }\n});\n\n// 20.2.2.33 Math.tanh(x)\n\n\nvar exp$2 = Math.exp;\n\n_export(_export.S, 'Math', {\n  tanh: function tanh(x) {\n    var a = _mathExpm1(x = +x);\n    var b = _mathExpm1(-x);\n    return a == Infinity ? 1 : b == Infinity ? -1 : (a - b) / (exp$2(x) + exp$2(-x));\n  }\n});\n\n// 20.2.2.34 Math.trunc(x)\n\n\n_export(_export.S, 'Math', {\n  trunc: function trunc(it) {\n    return (it > 0 ? Math.floor : Math.ceil)(it);\n  }\n});\n\nvar fromCharCode = String.fromCharCode;\nvar $fromCodePoint = String.fromCodePoint;\n\n// length should be 1, old FF problem\n_export(_export.S + _export.F * (!!$fromCodePoint && $fromCodePoint.length != 1), 'String', {\n  // 21.1.2.2 String.fromCodePoint(...codePoints)\n  fromCodePoint: function fromCodePoint(x) { // eslint-disable-line no-unused-vars\n    var res = [];\n    var aLen = arguments.length;\n    var i = 0;\n    var code;\n    while (aLen > i) {\n      code = +arguments[i++];\n      if (_toAbsoluteIndex(code, 0x10ffff) !== code) throw RangeError(code + ' is not a valid code point');\n      res.push(code < 0x10000\n        ? fromCharCode(code)\n        : fromCharCode(((code -= 0x10000) >> 10) + 0xd800, code % 0x400 + 0xdc00)\n      );\n    } return res.join('');\n  }\n});\n\n_export(_export.S, 'String', {\n  // 21.1.2.4 String.raw(callSite, ...substitutions)\n  raw: function raw(callSite) {\n    var tpl = _toIobject(callSite.raw);\n    var len = _toLength(tpl.length);\n    var aLen = arguments.length;\n    var res = [];\n    var i = 0;\n    while (len > i) {\n      res.push(String(tpl[i++]));\n      if (i < aLen) res.push(String(arguments[i]));\n    } return res.join('');\n  }\n});\n\n// 21.1.3.25 String.prototype.trim()\n_stringTrim('trim', function ($trim) {\n  return function trim() {\n    return $trim(this, 3);\n  };\n});\n\n// true  -> String#at\n// false -> String#codePointAt\nvar _stringAt = function (TO_STRING) {\n  return function (that, pos) {\n    var s = String(_defined(that));\n    var i = _toInteger(pos);\n    var l = s.length;\n    var a, b;\n    if (i < 0 || i >= l) return TO_STRING ? '' : undefined;\n    a = s.charCodeAt(i);\n    return a < 0xd800 || a > 0xdbff || i + 1 === l || (b = s.charCodeAt(i + 1)) < 0xdc00 || b > 0xdfff\n      ? TO_STRING ? s.charAt(i) : a\n      : TO_STRING ? s.slice(i, i + 2) : (a - 0xd800 << 10) + (b - 0xdc00) + 0x10000;\n  };\n};\n\nvar _iterators = {};\n\nvar IteratorPrototype = {};\n\n// 25.1.2.1.1 %IteratorPrototype%[@@iterator]()\n_hide(IteratorPrototype, _wks('iterator'), function () { return this; });\n\nvar _iterCreate = function (Constructor, NAME, next) {\n  Constructor.prototype = _objectCreate(IteratorPrototype, { next: _propertyDesc(1, next) });\n  _setToStringTag(Constructor, NAME + ' Iterator');\n};\n\nvar ITERATOR = _wks('iterator');\nvar BUGGY = !([].keys && 'next' in [].keys()); // Safari has buggy iterators w/o `next`\nvar FF_ITERATOR = '@@iterator';\nvar KEYS = 'keys';\nvar VALUES = 'values';\n\nvar returnThis = function () { return this; };\n\nvar _iterDefine = function (Base, NAME, Constructor, next, DEFAULT, IS_SET, FORCED) {\n  _iterCreate(Constructor, NAME, next);\n  var getMethod = function (kind) {\n    if (!BUGGY && kind in proto) return proto[kind];\n    switch (kind) {\n      case KEYS: return function keys() { return new Constructor(this, kind); };\n      case VALUES: return function values() { return new Constructor(this, kind); };\n    } return function entries() { return new Constructor(this, kind); };\n  };\n  var TAG = NAME + ' Iterator';\n  var DEF_VALUES = DEFAULT == VALUES;\n  var VALUES_BUG = false;\n  var proto = Base.prototype;\n  var $native = proto[ITERATOR] || proto[FF_ITERATOR] || DEFAULT && proto[DEFAULT];\n  var $default = $native || getMethod(DEFAULT);\n  var $entries = DEFAULT ? !DEF_VALUES ? $default : getMethod('entries') : undefined;\n  var $anyNative = NAME == 'Array' ? proto.entries || $native : $native;\n  var methods, key, IteratorPrototype;\n  // Fix native\n  if ($anyNative) {\n    IteratorPrototype = _objectGpo($anyNative.call(new Base()));\n    if (IteratorPrototype !== Object.prototype && IteratorPrototype.next) {\n      // Set @@toStringTag to native iterators\n      _setToStringTag(IteratorPrototype, TAG, true);\n      // fix for some old engines\n      if ( typeof IteratorPrototype[ITERATOR] != 'function') _hide(IteratorPrototype, ITERATOR, returnThis);\n    }\n  }\n  // fix Array#{values, @@iterator}.name in V8 / FF\n  if (DEF_VALUES && $native && $native.name !== VALUES) {\n    VALUES_BUG = true;\n    $default = function values() { return $native.call(this); };\n  }\n  // Define iterator\n  if ( (BUGGY || VALUES_BUG || !proto[ITERATOR])) {\n    _hide(proto, ITERATOR, $default);\n  }\n  // Plug for library\n  _iterators[NAME] = $default;\n  _iterators[TAG] = returnThis;\n  if (DEFAULT) {\n    methods = {\n      values: DEF_VALUES ? $default : getMethod(VALUES),\n      keys: IS_SET ? $default : getMethod(KEYS),\n      entries: $entries\n    };\n    if (FORCED) for (key in methods) {\n      if (!(key in proto)) _redefine(proto, key, methods[key]);\n    } else _export(_export.P + _export.F * (BUGGY || VALUES_BUG), NAME, methods);\n  }\n  return methods;\n};\n\nvar $at = _stringAt(true);\n\n// 21.1.3.27 String.prototype[@@iterator]()\n_iterDefine(String, 'String', function (iterated) {\n  this._t = String(iterated); // target\n  this._i = 0;                // next index\n// 21.1.5.2.1 %StringIteratorPrototype%.next()\n}, function () {\n  var O = this._t;\n  var index = this._i;\n  var point;\n  if (index >= O.length) return { value: undefined, done: true };\n  point = $at(O, index);\n  this._i += point.length;\n  return { value: point, done: false };\n});\n\nvar $at$1 = _stringAt(false);\n_export(_export.P, 'String', {\n  // 21.1.3.3 String.prototype.codePointAt(pos)\n  codePointAt: function codePointAt(pos) {\n    return $at$1(this, pos);\n  }\n});\n\n// 7.2.8 IsRegExp(argument)\n\n\nvar MATCH = _wks('match');\nvar _isRegexp = function (it) {\n  var isRegExp;\n  return _isObject(it) && ((isRegExp = it[MATCH]) !== undefined ? !!isRegExp : _cof(it) == 'RegExp');\n};\n\n// helper for String#{startsWith, endsWith, includes}\n\n\n\nvar _stringContext = function (that, searchString, NAME) {\n  if (_isRegexp(searchString)) throw TypeError('String#' + NAME + \" doesn't accept regex!\");\n  return String(_defined(that));\n};\n\nvar MATCH$1 = _wks('match');\nvar _failsIsRegexp = function (KEY) {\n  var re = /./;\n  try {\n    '/./'[KEY](re);\n  } catch (e) {\n    try {\n      re[MATCH$1] = false;\n      return !'/./'[KEY](re);\n    } catch (f) { /* empty */ }\n  } return true;\n};\n\nvar ENDS_WITH = 'endsWith';\nvar $endsWith = ''[ENDS_WITH];\n\n_export(_export.P + _export.F * _failsIsRegexp(ENDS_WITH), 'String', {\n  endsWith: function endsWith(searchString /* , endPosition = @length */) {\n    var that = _stringContext(this, searchString, ENDS_WITH);\n    var endPosition = arguments.length > 1 ? arguments[1] : undefined;\n    var len = _toLength(that.length);\n    var end = endPosition === undefined ? len : Math.min(_toLength(endPosition), len);\n    var search = String(searchString);\n    return $endsWith\n      ? $endsWith.call(that, search, end)\n      : that.slice(end - search.length, end) === search;\n  }\n});\n\nvar INCLUDES = 'includes';\n\n_export(_export.P + _export.F * _failsIsRegexp(INCLUDES), 'String', {\n  includes: function includes(searchString /* , position = 0 */) {\n    return !!~_stringContext(this, searchString, INCLUDES)\n      .indexOf(searchString, arguments.length > 1 ? arguments[1] : undefined);\n  }\n});\n\n_export(_export.P, 'String', {\n  // 21.1.3.13 String.prototype.repeat(count)\n  repeat: _stringRepeat\n});\n\nvar STARTS_WITH = 'startsWith';\nvar $startsWith = ''[STARTS_WITH];\n\n_export(_export.P + _export.F * _failsIsRegexp(STARTS_WITH), 'String', {\n  startsWith: function startsWith(searchString /* , position = 0 */) {\n    var that = _stringContext(this, searchString, STARTS_WITH);\n    var index = _toLength(Math.min(arguments.length > 1 ? arguments[1] : undefined, that.length));\n    var search = String(searchString);\n    return $startsWith\n      ? $startsWith.call(that, search, index)\n      : that.slice(index, index + search.length) === search;\n  }\n});\n\nvar quot = /\"/g;\n// B.2.3.2.1 CreateHTML(string, tag, attribute, value)\nvar createHTML = function (string, tag, attribute, value) {\n  var S = String(_defined(string));\n  var p1 = '<' + tag;\n  if (attribute !== '') p1 += ' ' + attribute + '=\"' + String(value).replace(quot, '&quot;') + '\"';\n  return p1 + '>' + S + '</' + tag + '>';\n};\nvar _stringHtml = function (NAME, exec) {\n  var O = {};\n  O[NAME] = exec(createHTML);\n  _export(_export.P + _export.F * _fails(function () {\n    var test = ''[NAME]('\"');\n    return test !== test.toLowerCase() || test.split('\"').length > 3;\n  }), 'String', O);\n};\n\n// B.2.3.2 String.prototype.anchor(name)\n_stringHtml('anchor', function (createHTML) {\n  return function anchor(name) {\n    return createHTML(this, 'a', 'name', name);\n  };\n});\n\n// B.2.3.3 String.prototype.big()\n_stringHtml('big', function (createHTML) {\n  return function big() {\n    return createHTML(this, 'big', '', '');\n  };\n});\n\n// B.2.3.4 String.prototype.blink()\n_stringHtml('blink', function (createHTML) {\n  return function blink() {\n    return createHTML(this, 'blink', '', '');\n  };\n});\n\n// B.2.3.5 String.prototype.bold()\n_stringHtml('bold', function (createHTML) {\n  return function bold() {\n    return createHTML(this, 'b', '', '');\n  };\n});\n\n// B.2.3.6 String.prototype.fixed()\n_stringHtml('fixed', function (createHTML) {\n  return function fixed() {\n    return createHTML(this, 'tt', '', '');\n  };\n});\n\n// B.2.3.7 String.prototype.fontcolor(color)\n_stringHtml('fontcolor', function (createHTML) {\n  return function fontcolor(color) {\n    return createHTML(this, 'font', 'color', color);\n  };\n});\n\n// B.2.3.8 String.prototype.fontsize(size)\n_stringHtml('fontsize', function (createHTML) {\n  return function fontsize(size) {\n    return createHTML(this, 'font', 'size', size);\n  };\n});\n\n// B.2.3.9 String.prototype.italics()\n_stringHtml('italics', function (createHTML) {\n  return function italics() {\n    return createHTML(this, 'i', '', '');\n  };\n});\n\n// B.2.3.10 String.prototype.link(url)\n_stringHtml('link', function (createHTML) {\n  return function link(url) {\n    return createHTML(this, 'a', 'href', url);\n  };\n});\n\n// B.2.3.11 String.prototype.small()\n_stringHtml('small', function (createHTML) {\n  return function small() {\n    return createHTML(this, 'small', '', '');\n  };\n});\n\n// B.2.3.12 String.prototype.strike()\n_stringHtml('strike', function (createHTML) {\n  return function strike() {\n    return createHTML(this, 'strike', '', '');\n  };\n});\n\n// B.2.3.13 String.prototype.sub()\n_stringHtml('sub', function (createHTML) {\n  return function sub() {\n    return createHTML(this, 'sub', '', '');\n  };\n});\n\n// B.2.3.14 String.prototype.sup()\n_stringHtml('sup', function (createHTML) {\n  return function sup() {\n    return createHTML(this, 'sup', '', '');\n  };\n});\n\n// 20.3.3.1 / 15.9.4.4 Date.now()\n\n\n_export(_export.S, 'Date', { now: function () { return new Date().getTime(); } });\n\n_export(_export.P + _export.F * _fails(function () {\n  return new Date(NaN).toJSON() !== null\n    || Date.prototype.toJSON.call({ toISOString: function () { return 1; } }) !== 1;\n}), 'Date', {\n  // eslint-disable-next-line no-unused-vars\n  toJSON: function toJSON(key) {\n    var O = _toObject(this);\n    var pv = _toPrimitive(O);\n    return typeof pv == 'number' && !isFinite(pv) ? null : O.toISOString();\n  }\n});\n\n// 20.3.4.36 / 15.9.5.43 Date.prototype.toISOString()\n\nvar getTime = Date.prototype.getTime;\nvar $toISOString = Date.prototype.toISOString;\n\nvar lz = function (num) {\n  return num > 9 ? num : '0' + num;\n};\n\n// PhantomJS / old WebKit has a broken implementations\nvar _dateToIsoString = (_fails(function () {\n  return $toISOString.call(new Date(-5e13 - 1)) != '0385-07-25T07:06:39.999Z';\n}) || !_fails(function () {\n  $toISOString.call(new Date(NaN));\n})) ? function toISOString() {\n  if (!isFinite(getTime.call(this))) throw RangeError('Invalid time value');\n  var d = this;\n  var y = d.getUTCFullYear();\n  var m = d.getUTCMilliseconds();\n  var s = y < 0 ? '-' : y > 9999 ? '+' : '';\n  return s + ('00000' + Math.abs(y)).slice(s ? -6 : -4) +\n    '-' + lz(d.getUTCMonth() + 1) + '-' + lz(d.getUTCDate()) +\n    'T' + lz(d.getUTCHours()) + ':' + lz(d.getUTCMinutes()) +\n    ':' + lz(d.getUTCSeconds()) + '.' + (m > 99 ? m : '0' + lz(m)) + 'Z';\n} : $toISOString;\n\n// 20.3.4.36 / 15.9.5.43 Date.prototype.toISOString()\n\n\n\n// PhantomJS / old WebKit has a broken implementations\n_export(_export.P + _export.F * (Date.prototype.toISOString !== _dateToIsoString), 'Date', {\n  toISOString: _dateToIsoString\n});\n\nvar DateProto = Date.prototype;\nvar INVALID_DATE = 'Invalid Date';\nvar TO_STRING = 'toString';\nvar $toString = DateProto[TO_STRING];\nvar getTime$1 = DateProto.getTime;\nif (new Date(NaN) + '' != INVALID_DATE) {\n  _redefine(DateProto, TO_STRING, function toString() {\n    var value = getTime$1.call(this);\n    // eslint-disable-next-line no-self-compare\n    return value === value ? $toString.call(this) : INVALID_DATE;\n  });\n}\n\nvar NUMBER$1 = 'number';\n\nvar _dateToPrimitive = function (hint) {\n  if (hint !== 'string' && hint !== NUMBER$1 && hint !== 'default') throw TypeError('Incorrect hint');\n  return _toPrimitive(_anObject(this), hint != NUMBER$1);\n};\n\nvar TO_PRIMITIVE$1 = _wks('toPrimitive');\nvar proto$1 = Date.prototype;\n\nif (!(TO_PRIMITIVE$1 in proto$1)) _hide(proto$1, TO_PRIMITIVE$1, _dateToPrimitive);\n\n// 22.1.2.2 / 15.4.3.2 Array.isArray(arg)\n\n\n_export(_export.S, 'Array', { isArray: _isArray });\n\n// call something on iterator step with safe closing on error\n\nvar _iterCall = function (iterator, fn, value, entries) {\n  try {\n    return entries ? fn(_anObject(value)[0], value[1]) : fn(value);\n  // 7.4.6 IteratorClose(iterator, completion)\n  } catch (e) {\n    var ret = iterator['return'];\n    if (ret !== undefined) _anObject(ret.call(iterator));\n    throw e;\n  }\n};\n\n// check on default Array iterator\n\nvar ITERATOR$1 = _wks('iterator');\nvar ArrayProto = Array.prototype;\n\nvar _isArrayIter = function (it) {\n  return it !== undefined && (_iterators.Array === it || ArrayProto[ITERATOR$1] === it);\n};\n\nvar _createProperty = function (object, index, value) {\n  if (index in object) _objectDp.f(object, index, _propertyDesc(0, value));\n  else object[index] = value;\n};\n\nvar ITERATOR$2 = _wks('iterator');\n\nvar core_getIteratorMethod = _core.getIteratorMethod = function (it) {\n  if (it != undefined) return it[ITERATOR$2]\n    || it['@@iterator']\n    || _iterators[_classof(it)];\n};\n\nvar ITERATOR$3 = _wks('iterator');\nvar SAFE_CLOSING = false;\n\ntry {\n  var riter = [7][ITERATOR$3]();\n  riter['return'] = function () { SAFE_CLOSING = true; };\n  // eslint-disable-next-line no-throw-literal\n  Array.from(riter, function () { throw 2; });\n} catch (e) { /* empty */ }\n\nvar _iterDetect = function (exec, skipClosing) {\n  if (!skipClosing && !SAFE_CLOSING) return false;\n  var safe = false;\n  try {\n    var arr = [7];\n    var iter = arr[ITERATOR$3]();\n    iter.next = function () { return { done: safe = true }; };\n    arr[ITERATOR$3] = function () { return iter; };\n    exec(arr);\n  } catch (e) { /* empty */ }\n  return safe;\n};\n\n_export(_export.S + _export.F * !_iterDetect(function (iter) { Array.from(iter); }), 'Array', {\n  // 22.1.2.1 Array.from(arrayLike, mapfn = undefined, thisArg = undefined)\n  from: function from(arrayLike /* , mapfn = undefined, thisArg = undefined */) {\n    var O = _toObject(arrayLike);\n    var C = typeof this == 'function' ? this : Array;\n    var aLen = arguments.length;\n    var mapfn = aLen > 1 ? arguments[1] : undefined;\n    var mapping = mapfn !== undefined;\n    var index = 0;\n    var iterFn = core_getIteratorMethod(O);\n    var length, result, step, iterator;\n    if (mapping) mapfn = _ctx(mapfn, aLen > 2 ? arguments[2] : undefined, 2);\n    // if object isn't iterable or it's array with default iterator - use simple case\n    if (iterFn != undefined && !(C == Array && _isArrayIter(iterFn))) {\n      for (iterator = iterFn.call(O), result = new C(); !(step = iterator.next()).done; index++) {\n        _createProperty(result, index, mapping ? _iterCall(iterator, mapfn, [step.value, index], true) : step.value);\n      }\n    } else {\n      length = _toLength(O.length);\n      for (result = new C(length); length > index; index++) {\n        _createProperty(result, index, mapping ? mapfn(O[index], index) : O[index]);\n      }\n    }\n    result.length = index;\n    return result;\n  }\n});\n\n// WebKit Array.of isn't generic\n_export(_export.S + _export.F * _fails(function () {\n  function F() { /* empty */ }\n  return !(Array.of.call(F) instanceof F);\n}), 'Array', {\n  // 22.1.2.3 Array.of( ...items)\n  of: function of(/* ...args */) {\n    var index = 0;\n    var aLen = arguments.length;\n    var result = new (typeof this == 'function' ? this : Array)(aLen);\n    while (aLen > index) _createProperty(result, index, arguments[index++]);\n    result.length = aLen;\n    return result;\n  }\n});\n\nvar _strictMethod = function (method, arg) {\n  return !!method && _fails(function () {\n    // eslint-disable-next-line no-useless-call\n    arg ? method.call(null, function () { /* empty */ }, 1) : method.call(null);\n  });\n};\n\n// 22.1.3.13 Array.prototype.join(separator)\n\n\nvar arrayJoin = [].join;\n\n// fallback for not array-like strings\n_export(_export.P + _export.F * (_iobject != Object || !_strictMethod(arrayJoin)), 'Array', {\n  join: function join(separator) {\n    return arrayJoin.call(_toIobject(this), separator === undefined ? ',' : separator);\n  }\n});\n\nvar arraySlice$1 = [].slice;\n\n// fallback for not array-like ES3 strings and DOM objects\n_export(_export.P + _export.F * _fails(function () {\n  if (_html) arraySlice$1.call(_html);\n}), 'Array', {\n  slice: function slice(begin, end) {\n    var len = _toLength(this.length);\n    var klass = _cof(this);\n    end = end === undefined ? len : end;\n    if (klass == 'Array') return arraySlice$1.call(this, begin, end);\n    var start = _toAbsoluteIndex(begin, len);\n    var upTo = _toAbsoluteIndex(end, len);\n    var size = _toLength(upTo - start);\n    var cloned = new Array(size);\n    var i = 0;\n    for (; i < size; i++) cloned[i] = klass == 'String'\n      ? this.charAt(start + i)\n      : this[start + i];\n    return cloned;\n  }\n});\n\nvar $sort = [].sort;\nvar test$1 = [1, 2, 3];\n\n_export(_export.P + _export.F * (_fails(function () {\n  // IE8-\n  test$1.sort(undefined);\n}) || !_fails(function () {\n  // V8 bug\n  test$1.sort(null);\n  // Old WebKit\n}) || !_strictMethod($sort)), 'Array', {\n  // 22.1.3.25 Array.prototype.sort(comparefn)\n  sort: function sort(comparefn) {\n    return comparefn === undefined\n      ? $sort.call(_toObject(this))\n      : $sort.call(_toObject(this), _aFunction(comparefn));\n  }\n});\n\nvar SPECIES = _wks('species');\n\nvar _arraySpeciesConstructor = function (original) {\n  var C;\n  if (_isArray(original)) {\n    C = original.constructor;\n    // cross-realm fallback\n    if (typeof C == 'function' && (C === Array || _isArray(C.prototype))) C = undefined;\n    if (_isObject(C)) {\n      C = C[SPECIES];\n      if (C === null) C = undefined;\n    }\n  } return C === undefined ? Array : C;\n};\n\n// 9.4.2.3 ArraySpeciesCreate(originalArray, length)\n\n\nvar _arraySpeciesCreate = function (original, length) {\n  return new (_arraySpeciesConstructor(original))(length);\n};\n\n// 0 -> Array#forEach\n// 1 -> Array#map\n// 2 -> Array#filter\n// 3 -> Array#some\n// 4 -> Array#every\n// 5 -> Array#find\n// 6 -> Array#findIndex\n\n\n\n\n\nvar _arrayMethods = function (TYPE, $create) {\n  var IS_MAP = TYPE == 1;\n  var IS_FILTER = TYPE == 2;\n  var IS_SOME = TYPE == 3;\n  var IS_EVERY = TYPE == 4;\n  var IS_FIND_INDEX = TYPE == 6;\n  var NO_HOLES = TYPE == 5 || IS_FIND_INDEX;\n  var create = $create || _arraySpeciesCreate;\n  return function ($this, callbackfn, that) {\n    var O = _toObject($this);\n    var self = _iobject(O);\n    var f = _ctx(callbackfn, that, 3);\n    var length = _toLength(self.length);\n    var index = 0;\n    var result = IS_MAP ? create($this, length) : IS_FILTER ? create($this, 0) : undefined;\n    var val, res;\n    for (;length > index; index++) if (NO_HOLES || index in self) {\n      val = self[index];\n      res = f(val, index, O);\n      if (TYPE) {\n        if (IS_MAP) result[index] = res;   // map\n        else if (res) switch (TYPE) {\n          case 3: return true;             // some\n          case 5: return val;              // find\n          case 6: return index;            // findIndex\n          case 2: result.push(val);        // filter\n        } else if (IS_EVERY) return false; // every\n      }\n    }\n    return IS_FIND_INDEX ? -1 : IS_SOME || IS_EVERY ? IS_EVERY : result;\n  };\n};\n\nvar $forEach = _arrayMethods(0);\nvar STRICT = _strictMethod([].forEach, true);\n\n_export(_export.P + _export.F * !STRICT, 'Array', {\n  // 22.1.3.10 / 15.4.4.18 Array.prototype.forEach(callbackfn [, thisArg])\n  forEach: function forEach(callbackfn /* , thisArg */) {\n    return $forEach(this, callbackfn, arguments[1]);\n  }\n});\n\nvar $map = _arrayMethods(1);\n\n_export(_export.P + _export.F * !_strictMethod([].map, true), 'Array', {\n  // 22.1.3.15 / 15.4.4.19 Array.prototype.map(callbackfn [, thisArg])\n  map: function map(callbackfn /* , thisArg */) {\n    return $map(this, callbackfn, arguments[1]);\n  }\n});\n\nvar $filter = _arrayMethods(2);\n\n_export(_export.P + _export.F * !_strictMethod([].filter, true), 'Array', {\n  // 22.1.3.7 / 15.4.4.20 Array.prototype.filter(callbackfn [, thisArg])\n  filter: function filter(callbackfn /* , thisArg */) {\n    return $filter(this, callbackfn, arguments[1]);\n  }\n});\n\nvar $some = _arrayMethods(3);\n\n_export(_export.P + _export.F * !_strictMethod([].some, true), 'Array', {\n  // 22.1.3.23 / 15.4.4.17 Array.prototype.some(callbackfn [, thisArg])\n  some: function some(callbackfn /* , thisArg */) {\n    return $some(this, callbackfn, arguments[1]);\n  }\n});\n\nvar $every = _arrayMethods(4);\n\n_export(_export.P + _export.F * !_strictMethod([].every, true), 'Array', {\n  // 22.1.3.5 / 15.4.4.16 Array.prototype.every(callbackfn [, thisArg])\n  every: function every(callbackfn /* , thisArg */) {\n    return $every(this, callbackfn, arguments[1]);\n  }\n});\n\nvar _arrayReduce = function (that, callbackfn, aLen, memo, isRight) {\n  _aFunction(callbackfn);\n  var O = _toObject(that);\n  var self = _iobject(O);\n  var length = _toLength(O.length);\n  var index = isRight ? length - 1 : 0;\n  var i = isRight ? -1 : 1;\n  if (aLen < 2) for (;;) {\n    if (index in self) {\n      memo = self[index];\n      index += i;\n      break;\n    }\n    index += i;\n    if (isRight ? index < 0 : length <= index) {\n      throw TypeError('Reduce of empty array with no initial value');\n    }\n  }\n  for (;isRight ? index >= 0 : length > index; index += i) if (index in self) {\n    memo = callbackfn(memo, self[index], index, O);\n  }\n  return memo;\n};\n\n_export(_export.P + _export.F * !_strictMethod([].reduce, true), 'Array', {\n  // 22.1.3.18 / 15.4.4.21 Array.prototype.reduce(callbackfn [, initialValue])\n  reduce: function reduce(callbackfn /* , initialValue */) {\n    return _arrayReduce(this, callbackfn, arguments.length, arguments[1], false);\n  }\n});\n\n_export(_export.P + _export.F * !_strictMethod([].reduceRight, true), 'Array', {\n  // 22.1.3.19 / 15.4.4.22 Array.prototype.reduceRight(callbackfn [, initialValue])\n  reduceRight: function reduceRight(callbackfn /* , initialValue */) {\n    return _arrayReduce(this, callbackfn, arguments.length, arguments[1], true);\n  }\n});\n\nvar $indexOf = _arrayIncludes(false);\nvar $native = [].indexOf;\nvar NEGATIVE_ZERO = !!$native && 1 / [1].indexOf(1, -0) < 0;\n\n_export(_export.P + _export.F * (NEGATIVE_ZERO || !_strictMethod($native)), 'Array', {\n  // 22.1.3.11 / 15.4.4.14 Array.prototype.indexOf(searchElement [, fromIndex])\n  indexOf: function indexOf(searchElement /* , fromIndex = 0 */) {\n    return NEGATIVE_ZERO\n      // convert -0 to +0\n      ? $native.apply(this, arguments) || 0\n      : $indexOf(this, searchElement, arguments[1]);\n  }\n});\n\nvar $native$1 = [].lastIndexOf;\nvar NEGATIVE_ZERO$1 = !!$native$1 && 1 / [1].lastIndexOf(1, -0) < 0;\n\n_export(_export.P + _export.F * (NEGATIVE_ZERO$1 || !_strictMethod($native$1)), 'Array', {\n  // 22.1.3.14 / 15.4.4.15 Array.prototype.lastIndexOf(searchElement [, fromIndex])\n  lastIndexOf: function lastIndexOf(searchElement /* , fromIndex = @[*-1] */) {\n    // convert -0 to +0\n    if (NEGATIVE_ZERO$1) return $native$1.apply(this, arguments) || 0;\n    var O = _toIobject(this);\n    var length = _toLength(O.length);\n    var index = length - 1;\n    if (arguments.length > 1) index = Math.min(index, _toInteger(arguments[1]));\n    if (index < 0) index = length + index;\n    for (;index >= 0; index--) if (index in O) if (O[index] === searchElement) return index || 0;\n    return -1;\n  }\n});\n\nvar _arrayCopyWithin = [].copyWithin || function copyWithin(target /* = 0 */, start /* = 0, end = @length */) {\n  var O = _toObject(this);\n  var len = _toLength(O.length);\n  var to = _toAbsoluteIndex(target, len);\n  var from = _toAbsoluteIndex(start, len);\n  var end = arguments.length > 2 ? arguments[2] : undefined;\n  var count = Math.min((end === undefined ? len : _toAbsoluteIndex(end, len)) - from, len - to);\n  var inc = 1;\n  if (from < to && to < from + count) {\n    inc = -1;\n    from += count - 1;\n    to += count - 1;\n  }\n  while (count-- > 0) {\n    if (from in O) O[to] = O[from];\n    else delete O[to];\n    to += inc;\n    from += inc;\n  } return O;\n};\n\n// 22.1.3.31 Array.prototype[@@unscopables]\nvar UNSCOPABLES = _wks('unscopables');\nvar ArrayProto$1 = Array.prototype;\nif (ArrayProto$1[UNSCOPABLES] == undefined) _hide(ArrayProto$1, UNSCOPABLES, {});\nvar _addToUnscopables = function (key) {\n  ArrayProto$1[UNSCOPABLES][key] = true;\n};\n\n// 22.1.3.3 Array.prototype.copyWithin(target, start, end = this.length)\n\n\n_export(_export.P, 'Array', { copyWithin: _arrayCopyWithin });\n\n_addToUnscopables('copyWithin');\n\nvar _arrayFill = function fill(value /* , start = 0, end = @length */) {\n  var O = _toObject(this);\n  var length = _toLength(O.length);\n  var aLen = arguments.length;\n  var index = _toAbsoluteIndex(aLen > 1 ? arguments[1] : undefined, length);\n  var end = aLen > 2 ? arguments[2] : undefined;\n  var endPos = end === undefined ? length : _toAbsoluteIndex(end, length);\n  while (endPos > index) O[index++] = value;\n  return O;\n};\n\n// 22.1.3.6 Array.prototype.fill(value, start = 0, end = this.length)\n\n\n_export(_export.P, 'Array', { fill: _arrayFill });\n\n_addToUnscopables('fill');\n\n// 22.1.3.8 Array.prototype.find(predicate, thisArg = undefined)\n\nvar $find = _arrayMethods(5);\nvar KEY = 'find';\nvar forced = true;\n// Shouldn't skip holes\nif (KEY in []) Array(1)[KEY](function () { forced = false; });\n_export(_export.P + _export.F * forced, 'Array', {\n  find: function find(callbackfn /* , that = undefined */) {\n    return $find(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n  }\n});\n_addToUnscopables(KEY);\n\n// 22.1.3.9 Array.prototype.findIndex(predicate, thisArg = undefined)\n\nvar $find$1 = _arrayMethods(6);\nvar KEY$1 = 'findIndex';\nvar forced$1 = true;\n// Shouldn't skip holes\nif (KEY$1 in []) Array(1)[KEY$1](function () { forced$1 = false; });\n_export(_export.P + _export.F * forced$1, 'Array', {\n  findIndex: function findIndex(callbackfn /* , that = undefined */) {\n    return $find$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n  }\n});\n_addToUnscopables(KEY$1);\n\nvar SPECIES$1 = _wks('species');\n\nvar _setSpecies = function (KEY) {\n  var C = _global[KEY];\n  if (_descriptors && C && !C[SPECIES$1]) _objectDp.f(C, SPECIES$1, {\n    configurable: true,\n    get: function () { return this; }\n  });\n};\n\n_setSpecies('Array');\n\nvar _iterStep = function (done, value) {\n  return { value: value, done: !!done };\n};\n\n// 22.1.3.4 Array.prototype.entries()\n// 22.1.3.13 Array.prototype.keys()\n// 22.1.3.29 Array.prototype.values()\n// 22.1.3.30 Array.prototype[@@iterator]()\nvar es6_array_iterator = _iterDefine(Array, 'Array', function (iterated, kind) {\n  this._t = _toIobject(iterated); // target\n  this._i = 0;                   // next index\n  this._k = kind;                // kind\n// 22.1.5.2.1 %ArrayIteratorPrototype%.next()\n}, function () {\n  var O = this._t;\n  var kind = this._k;\n  var index = this._i++;\n  if (!O || index >= O.length) {\n    this._t = undefined;\n    return _iterStep(1);\n  }\n  if (kind == 'keys') return _iterStep(0, index);\n  if (kind == 'values') return _iterStep(0, O[index]);\n  return _iterStep(0, [index, O[index]]);\n}, 'values');\n\n// argumentsList[@@iterator] is %ArrayProto_values% (9.4.4.6, 9.4.4.7)\n_iterators.Arguments = _iterators.Array;\n\n_addToUnscopables('keys');\n_addToUnscopables('values');\n_addToUnscopables('entries');\n\n// 21.2.5.3 get RegExp.prototype.flags\n\nvar _flags = function () {\n  var that = _anObject(this);\n  var result = '';\n  if (that.global) result += 'g';\n  if (that.ignoreCase) result += 'i';\n  if (that.multiline) result += 'm';\n  if (that.unicode) result += 'u';\n  if (that.sticky) result += 'y';\n  return result;\n};\n\nvar dP$4 = _objectDp.f;\nvar gOPN$3 = _objectGopn.f;\n\n\nvar $RegExp = _global.RegExp;\nvar Base$1 = $RegExp;\nvar proto$2 = $RegExp.prototype;\nvar re1 = /a/g;\nvar re2 = /a/g;\n// \"new\" creates a new object, old webkit buggy here\nvar CORRECT_NEW = new $RegExp(re1) !== re1;\n\nif (_descriptors && (!CORRECT_NEW || _fails(function () {\n  re2[_wks('match')] = false;\n  // RegExp constructor can alter flags and IsRegExp works correct with @@match\n  return $RegExp(re1) != re1 || $RegExp(re2) == re2 || $RegExp(re1, 'i') != '/a/i';\n}))) {\n  $RegExp = function RegExp(p, f) {\n    var tiRE = this instanceof $RegExp;\n    var piRE = _isRegexp(p);\n    var fiU = f === undefined;\n    return !tiRE && piRE && p.constructor === $RegExp && fiU ? p\n      : _inheritIfRequired(CORRECT_NEW\n        ? new Base$1(piRE && !fiU ? p.source : p, f)\n        : Base$1((piRE = p instanceof $RegExp) ? p.source : p, piRE && fiU ? _flags.call(p) : f)\n      , tiRE ? this : proto$2, $RegExp);\n  };\n  var proxy = function (key) {\n    key in $RegExp || dP$4($RegExp, key, {\n      configurable: true,\n      get: function () { return Base$1[key]; },\n      set: function (it) { Base$1[key] = it; }\n    });\n  };\n  for (var keys$1 = gOPN$3(Base$1), i = 0; keys$1.length > i;) proxy(keys$1[i++]);\n  proto$2.constructor = $RegExp;\n  $RegExp.prototype = proto$2;\n  _redefine(_global, 'RegExp', $RegExp);\n}\n\n_setSpecies('RegExp');\n\nvar nativeExec = RegExp.prototype.exec;\n// This always refers to the native implementation, because the\n// String#replace polyfill uses ./fix-regexp-well-known-symbol-logic.js,\n// which loads this file before patching the method.\nvar nativeReplace = String.prototype.replace;\n\nvar patchedExec = nativeExec;\n\nvar LAST_INDEX = 'lastIndex';\n\nvar UPDATES_LAST_INDEX_WRONG = (function () {\n  var re1 = /a/,\n      re2 = /b*/g;\n  nativeExec.call(re1, 'a');\n  nativeExec.call(re2, 'a');\n  return re1[LAST_INDEX] !== 0 || re2[LAST_INDEX] !== 0;\n})();\n\n// nonparticipating capturing group, copied from es5-shim's String#split patch.\nvar NPCG_INCLUDED = /()??/.exec('')[1] !== undefined;\n\nvar PATCH = UPDATES_LAST_INDEX_WRONG || NPCG_INCLUDED;\n\nif (PATCH) {\n  patchedExec = function exec(str) {\n    var re = this;\n    var lastIndex, reCopy, match, i;\n\n    if (NPCG_INCLUDED) {\n      reCopy = new RegExp('^' + re.source + '$(?!\\\\s)', _flags.call(re));\n    }\n    if (UPDATES_LAST_INDEX_WRONG) lastIndex = re[LAST_INDEX];\n\n    match = nativeExec.call(re, str);\n\n    if (UPDATES_LAST_INDEX_WRONG && match) {\n      re[LAST_INDEX] = re.global ? match.index + match[0].length : lastIndex;\n    }\n    if (NPCG_INCLUDED && match && match.length > 1) {\n      // Fix browsers whose `exec` methods don't consistently return `undefined`\n      // for NPCG, like IE8. NOTE: This doesn' work for /(.?)?/\n      // eslint-disable-next-line no-loop-func\n      nativeReplace.call(match[0], reCopy, function () {\n        for (i = 1; i < arguments.length - 2; i++) {\n          if (arguments[i] === undefined) match[i] = undefined;\n        }\n      });\n    }\n\n    return match;\n  };\n}\n\nvar _regexpExec = patchedExec;\n\n_export({\n  target: 'RegExp',\n  proto: true,\n  forced: _regexpExec !== /./.exec\n}, {\n  exec: _regexpExec\n});\n\n// 21.2.5.3 get RegExp.prototype.flags()\nif (_descriptors && /./g.flags != 'g') _objectDp.f(RegExp.prototype, 'flags', {\n  configurable: true,\n  get: _flags\n});\n\nvar TO_STRING$1 = 'toString';\nvar $toString$1 = /./[TO_STRING$1];\n\nvar define = function (fn) {\n  _redefine(RegExp.prototype, TO_STRING$1, fn, true);\n};\n\n// 21.2.5.14 RegExp.prototype.toString()\nif (_fails(function () { return $toString$1.call({ source: 'a', flags: 'b' }) != '/a/b'; })) {\n  define(function toString() {\n    var R = _anObject(this);\n    return '/'.concat(R.source, '/',\n      'flags' in R ? R.flags : !_descriptors && R instanceof RegExp ? _flags.call(R) : undefined);\n  });\n// FF44- RegExp#toString has a wrong name\n} else if ($toString$1.name != TO_STRING$1) {\n  define(function toString() {\n    return $toString$1.call(this);\n  });\n}\n\nvar at = _stringAt(true);\n\n // `AdvanceStringIndex` abstract operation\n// https://tc39.github.io/ecma262/#sec-advancestringindex\nvar _advanceStringIndex = function (S, index, unicode) {\n  return index + (unicode ? at(S, index).length : 1);\n};\n\nvar builtinExec = RegExp.prototype.exec;\n\n // `RegExpExec` abstract operation\n// https://tc39.github.io/ecma262/#sec-regexpexec\nvar _regexpExecAbstract = function (R, S) {\n  var exec = R.exec;\n  if (typeof exec === 'function') {\n    var result = exec.call(R, S);\n    if (typeof result !== 'object') {\n      throw new TypeError('RegExp exec method returned something other than an Object or null');\n    }\n    return result;\n  }\n  if (_classof(R) !== 'RegExp') {\n    throw new TypeError('RegExp#exec called on incompatible receiver');\n  }\n  return builtinExec.call(R, S);\n};\n\nvar SPECIES$2 = _wks('species');\n\nvar REPLACE_SUPPORTS_NAMED_GROUPS = !_fails(function () {\n  // #replace needs built-in support for named groups.\n  // #match works fine because it just return the exec results, even if it has\n  // a \"grops\" property.\n  var re = /./;\n  re.exec = function () {\n    var result = [];\n    result.groups = { a: '7' };\n    return result;\n  };\n  return ''.replace(re, '$<a>') !== '7';\n});\n\nvar SPLIT_WORKS_WITH_OVERWRITTEN_EXEC = (function () {\n  // Chrome 51 has a buggy \"split\" implementation when RegExp#exec !== nativeExec\n  var re = /(?:)/;\n  var originalExec = re.exec;\n  re.exec = function () { return originalExec.apply(this, arguments); };\n  var result = 'ab'.split(re);\n  return result.length === 2 && result[0] === 'a' && result[1] === 'b';\n})();\n\nvar _fixReWks = function (KEY, length, exec) {\n  var SYMBOL = _wks(KEY);\n\n  var DELEGATES_TO_SYMBOL = !_fails(function () {\n    // String methods call symbol-named RegEp methods\n    var O = {};\n    O[SYMBOL] = function () { return 7; };\n    return ''[KEY](O) != 7;\n  });\n\n  var DELEGATES_TO_EXEC = DELEGATES_TO_SYMBOL ? !_fails(function () {\n    // Symbol-named RegExp methods call .exec\n    var execCalled = false;\n    var re = /a/;\n    re.exec = function () { execCalled = true; return null; };\n    if (KEY === 'split') {\n      // RegExp[@@split] doesn't call the regex's exec method, but first creates\n      // a new one. We need to return the patched regex when creating the new one.\n      re.constructor = {};\n      re.constructor[SPECIES$2] = function () { return re; };\n    }\n    re[SYMBOL]('');\n    return !execCalled;\n  }) : undefined;\n\n  if (\n    !DELEGATES_TO_SYMBOL ||\n    !DELEGATES_TO_EXEC ||\n    (KEY === 'replace' && !REPLACE_SUPPORTS_NAMED_GROUPS) ||\n    (KEY === 'split' && !SPLIT_WORKS_WITH_OVERWRITTEN_EXEC)\n  ) {\n    var nativeRegExpMethod = /./[SYMBOL];\n    var fns = exec(\n      _defined,\n      SYMBOL,\n      ''[KEY],\n      function maybeCallNative(nativeMethod, regexp, str, arg2, forceStringMethod) {\n        if (regexp.exec === _regexpExec) {\n          if (DELEGATES_TO_SYMBOL && !forceStringMethod) {\n            // The native String method already delegates to @@method (this\n            // polyfilled function), leasing to infinite recursion.\n            // We avoid it by directly calling the native @@method method.\n            return { done: true, value: nativeRegExpMethod.call(regexp, str, arg2) };\n          }\n          return { done: true, value: nativeMethod.call(str, regexp, arg2) };\n        }\n        return { done: false };\n      }\n    );\n    var strfn = fns[0];\n    var rxfn = fns[1];\n\n    _redefine(String.prototype, KEY, strfn);\n    _hide(RegExp.prototype, SYMBOL, length == 2\n      // 21.2.5.8 RegExp.prototype[@@replace](string, replaceValue)\n      // 21.2.5.11 RegExp.prototype[@@split](string, limit)\n      ? function (string, arg) { return rxfn.call(string, this, arg); }\n      // 21.2.5.6 RegExp.prototype[@@match](string)\n      // 21.2.5.9 RegExp.prototype[@@search](string)\n      : function (string) { return rxfn.call(string, this); }\n    );\n  }\n};\n\n// @@match logic\n_fixReWks('match', 1, function (defined, MATCH, $match, maybeCallNative) {\n  return [\n    // `String.prototype.match` method\n    // https://tc39.github.io/ecma262/#sec-string.prototype.match\n    function match(regexp) {\n      var O = defined(this);\n      var fn = regexp == undefined ? undefined : regexp[MATCH];\n      return fn !== undefined ? fn.call(regexp, O) : new RegExp(regexp)[MATCH](String(O));\n    },\n    // `RegExp.prototype[@@match]` method\n    // https://tc39.github.io/ecma262/#sec-regexp.prototype-@@match\n    function (regexp) {\n      var res = maybeCallNative($match, regexp, this);\n      if (res.done) return res.value;\n      var rx = _anObject(regexp);\n      var S = String(this);\n      if (!rx.global) return _regexpExecAbstract(rx, S);\n      var fullUnicode = rx.unicode;\n      rx.lastIndex = 0;\n      var A = [];\n      var n = 0;\n      var result;\n      while ((result = _regexpExecAbstract(rx, S)) !== null) {\n        var matchStr = String(result[0]);\n        A[n] = matchStr;\n        if (matchStr === '') rx.lastIndex = _advanceStringIndex(S, _toLength(rx.lastIndex), fullUnicode);\n        n++;\n      }\n      return n === 0 ? null : A;\n    }\n  ];\n});\n\nvar max$1 = Math.max;\nvar min$2 = Math.min;\nvar floor$3 = Math.floor;\nvar SUBSTITUTION_SYMBOLS = /\\$([$&`']|\\d\\d?|<[^>]*>)/g;\nvar SUBSTITUTION_SYMBOLS_NO_NAMED = /\\$([$&`']|\\d\\d?)/g;\n\nvar maybeToString = function (it) {\n  return it === undefined ? it : String(it);\n};\n\n// @@replace logic\n_fixReWks('replace', 2, function (defined, REPLACE, $replace, maybeCallNative) {\n  return [\n    // `String.prototype.replace` method\n    // https://tc39.github.io/ecma262/#sec-string.prototype.replace\n    function replace(searchValue, replaceValue) {\n      var O = defined(this);\n      var fn = searchValue == undefined ? undefined : searchValue[REPLACE];\n      return fn !== undefined\n        ? fn.call(searchValue, O, replaceValue)\n        : $replace.call(String(O), searchValue, replaceValue);\n    },\n    // `RegExp.prototype[@@replace]` method\n    // https://tc39.github.io/ecma262/#sec-regexp.prototype-@@replace\n    function (regexp, replaceValue) {\n      var res = maybeCallNative($replace, regexp, this, replaceValue);\n      if (res.done) return res.value;\n\n      var rx = _anObject(regexp);\n      var S = String(this);\n      var functionalReplace = typeof replaceValue === 'function';\n      if (!functionalReplace) replaceValue = String(replaceValue);\n      var global = rx.global;\n      if (global) {\n        var fullUnicode = rx.unicode;\n        rx.lastIndex = 0;\n      }\n      var results = [];\n      while (true) {\n        var result = _regexpExecAbstract(rx, S);\n        if (result === null) break;\n        results.push(result);\n        if (!global) break;\n        var matchStr = String(result[0]);\n        if (matchStr === '') rx.lastIndex = _advanceStringIndex(S, _toLength(rx.lastIndex), fullUnicode);\n      }\n      var accumulatedResult = '';\n      var nextSourcePosition = 0;\n      for (var i = 0; i < results.length; i++) {\n        result = results[i];\n        var matched = String(result[0]);\n        var position = max$1(min$2(_toInteger(result.index), S.length), 0);\n        var captures = [];\n        // NOTE: This is equivalent to\n        //   captures = result.slice(1).map(maybeToString)\n        // but for some reason `nativeSlice.call(result, 1, result.length)` (called in\n        // the slice polyfill when slicing native arrays) \"doesn't work\" in safari 9 and\n        // causes a crash (https://pastebin.com/N21QzeQA) when trying to debug it.\n        for (var j = 1; j < result.length; j++) captures.push(maybeToString(result[j]));\n        var namedCaptures = result.groups;\n        if (functionalReplace) {\n          var replacerArgs = [matched].concat(captures, position, S);\n          if (namedCaptures !== undefined) replacerArgs.push(namedCaptures);\n          var replacement = String(replaceValue.apply(undefined, replacerArgs));\n        } else {\n          replacement = getSubstitution(matched, S, position, captures, namedCaptures, replaceValue);\n        }\n        if (position >= nextSourcePosition) {\n          accumulatedResult += S.slice(nextSourcePosition, position) + replacement;\n          nextSourcePosition = position + matched.length;\n        }\n      }\n      return accumulatedResult + S.slice(nextSourcePosition);\n    }\n  ];\n\n    // https://tc39.github.io/ecma262/#sec-getsubstitution\n  function getSubstitution(matched, str, position, captures, namedCaptures, replacement) {\n    var tailPos = position + matched.length;\n    var m = captures.length;\n    var symbols = SUBSTITUTION_SYMBOLS_NO_NAMED;\n    if (namedCaptures !== undefined) {\n      namedCaptures = _toObject(namedCaptures);\n      symbols = SUBSTITUTION_SYMBOLS;\n    }\n    return $replace.call(replacement, symbols, function (match, ch) {\n      var capture;\n      switch (ch.charAt(0)) {\n        case '$': return '$';\n        case '&': return matched;\n        case '`': return str.slice(0, position);\n        case \"'\": return str.slice(tailPos);\n        case '<':\n          capture = namedCaptures[ch.slice(1, -1)];\n          break;\n        default: // \\d\\d?\n          var n = +ch;\n          if (n === 0) return match;\n          if (n > m) {\n            var f = floor$3(n / 10);\n            if (f === 0) return match;\n            if (f <= m) return captures[f - 1] === undefined ? ch.charAt(1) : captures[f - 1] + ch.charAt(1);\n            return match;\n          }\n          capture = captures[n - 1];\n      }\n      return capture === undefined ? '' : capture;\n    });\n  }\n});\n\n// @@search logic\n_fixReWks('search', 1, function (defined, SEARCH, $search, maybeCallNative) {\n  return [\n    // `String.prototype.search` method\n    // https://tc39.github.io/ecma262/#sec-string.prototype.search\n    function search(regexp) {\n      var O = defined(this);\n      var fn = regexp == undefined ? undefined : regexp[SEARCH];\n      return fn !== undefined ? fn.call(regexp, O) : new RegExp(regexp)[SEARCH](String(O));\n    },\n    // `RegExp.prototype[@@search]` method\n    // https://tc39.github.io/ecma262/#sec-regexp.prototype-@@search\n    function (regexp) {\n      var res = maybeCallNative($search, regexp, this);\n      if (res.done) return res.value;\n      var rx = _anObject(regexp);\n      var S = String(this);\n      var previousLastIndex = rx.lastIndex;\n      if (!_sameValue(previousLastIndex, 0)) rx.lastIndex = 0;\n      var result = _regexpExecAbstract(rx, S);\n      if (!_sameValue(rx.lastIndex, previousLastIndex)) rx.lastIndex = previousLastIndex;\n      return result === null ? -1 : result.index;\n    }\n  ];\n});\n\n// 7.3.20 SpeciesConstructor(O, defaultConstructor)\n\n\nvar SPECIES$3 = _wks('species');\nvar _speciesConstructor = function (O, D) {\n  var C = _anObject(O).constructor;\n  var S;\n  return C === undefined || (S = _anObject(C)[SPECIES$3]) == undefined ? D : _aFunction(S);\n};\n\nvar $min = Math.min;\nvar $push = [].push;\nvar $SPLIT = 'split';\nvar LENGTH = 'length';\nvar LAST_INDEX$1 = 'lastIndex';\nvar MAX_UINT32 = 0xffffffff;\n\n// babel-minify transpiles RegExp('x', 'y') -> /x/y and it causes SyntaxError\nvar SUPPORTS_Y = !_fails(function () { RegExp(MAX_UINT32, 'y'); });\n\n// @@split logic\n_fixReWks('split', 2, function (defined, SPLIT, $split, maybeCallNative) {\n  var internalSplit;\n  if (\n    'abbc'[$SPLIT](/(b)*/)[1] == 'c' ||\n    'test'[$SPLIT](/(?:)/, -1)[LENGTH] != 4 ||\n    'ab'[$SPLIT](/(?:ab)*/)[LENGTH] != 2 ||\n    '.'[$SPLIT](/(.?)(.?)/)[LENGTH] != 4 ||\n    '.'[$SPLIT](/()()/)[LENGTH] > 1 ||\n    ''[$SPLIT](/.?/)[LENGTH]\n  ) {\n    // based on es5-shim implementation, need to rework it\n    internalSplit = function (separator, limit) {\n      var string = String(this);\n      if (separator === undefined && limit === 0) return [];\n      // If `separator` is not a regex, use native split\n      if (!_isRegexp(separator)) return $split.call(string, separator, limit);\n      var output = [];\n      var flags = (separator.ignoreCase ? 'i' : '') +\n                  (separator.multiline ? 'm' : '') +\n                  (separator.unicode ? 'u' : '') +\n                  (separator.sticky ? 'y' : '');\n      var lastLastIndex = 0;\n      var splitLimit = limit === undefined ? MAX_UINT32 : limit >>> 0;\n      // Make `global` and avoid `lastIndex` issues by working with a copy\n      var separatorCopy = new RegExp(separator.source, flags + 'g');\n      var match, lastIndex, lastLength;\n      while (match = _regexpExec.call(separatorCopy, string)) {\n        lastIndex = separatorCopy[LAST_INDEX$1];\n        if (lastIndex > lastLastIndex) {\n          output.push(string.slice(lastLastIndex, match.index));\n          if (match[LENGTH] > 1 && match.index < string[LENGTH]) $push.apply(output, match.slice(1));\n          lastLength = match[0][LENGTH];\n          lastLastIndex = lastIndex;\n          if (output[LENGTH] >= splitLimit) break;\n        }\n        if (separatorCopy[LAST_INDEX$1] === match.index) separatorCopy[LAST_INDEX$1]++; // Avoid an infinite loop\n      }\n      if (lastLastIndex === string[LENGTH]) {\n        if (lastLength || !separatorCopy.test('')) output.push('');\n      } else output.push(string.slice(lastLastIndex));\n      return output[LENGTH] > splitLimit ? output.slice(0, splitLimit) : output;\n    };\n  // Chakra, V8\n  } else if ('0'[$SPLIT](undefined, 0)[LENGTH]) {\n    internalSplit = function (separator, limit) {\n      return separator === undefined && limit === 0 ? [] : $split.call(this, separator, limit);\n    };\n  } else {\n    internalSplit = $split;\n  }\n\n  return [\n    // `String.prototype.split` method\n    // https://tc39.github.io/ecma262/#sec-string.prototype.split\n    function split(separator, limit) {\n      var O = defined(this);\n      var splitter = separator == undefined ? undefined : separator[SPLIT];\n      return splitter !== undefined\n        ? splitter.call(separator, O, limit)\n        : internalSplit.call(String(O), separator, limit);\n    },\n    // `RegExp.prototype[@@split]` method\n    // https://tc39.github.io/ecma262/#sec-regexp.prototype-@@split\n    //\n    // NOTE: This cannot be properly polyfilled in engines that don't support\n    // the 'y' flag.\n    function (regexp, limit) {\n      var res = maybeCallNative(internalSplit, regexp, this, limit, internalSplit !== $split);\n      if (res.done) return res.value;\n\n      var rx = _anObject(regexp);\n      var S = String(this);\n      var C = _speciesConstructor(rx, RegExp);\n\n      var unicodeMatching = rx.unicode;\n      var flags = (rx.ignoreCase ? 'i' : '') +\n                  (rx.multiline ? 'm' : '') +\n                  (rx.unicode ? 'u' : '') +\n                  (SUPPORTS_Y ? 'y' : 'g');\n\n      // ^(? + rx + ) is needed, in combination with some S slicing, to\n      // simulate the 'y' flag.\n      var splitter = new C(SUPPORTS_Y ? rx : '^(?:' + rx.source + ')', flags);\n      var lim = limit === undefined ? MAX_UINT32 : limit >>> 0;\n      if (lim === 0) return [];\n      if (S.length === 0) return _regexpExecAbstract(splitter, S) === null ? [S] : [];\n      var p = 0;\n      var q = 0;\n      var A = [];\n      while (q < S.length) {\n        splitter.lastIndex = SUPPORTS_Y ? q : 0;\n        var z = _regexpExecAbstract(splitter, SUPPORTS_Y ? S : S.slice(q));\n        var e;\n        if (\n          z === null ||\n          (e = $min(_toLength(splitter.lastIndex + (SUPPORTS_Y ? 0 : q)), S.length)) === p\n        ) {\n          q = _advanceStringIndex(S, q, unicodeMatching);\n        } else {\n          A.push(S.slice(p, q));\n          if (A.length === lim) return A;\n          for (var i = 1; i <= z.length - 1; i++) {\n            A.push(z[i]);\n            if (A.length === lim) return A;\n          }\n          q = p = e;\n        }\n      }\n      A.push(S.slice(p));\n      return A;\n    }\n  ];\n});\n\nvar _anInstance = function (it, Constructor, name, forbiddenField) {\n  if (!(it instanceof Constructor) || (forbiddenField !== undefined && forbiddenField in it)) {\n    throw TypeError(name + ': incorrect invocation!');\n  } return it;\n};\n\nvar _forOf = createCommonjsModule(function (module) {\nvar BREAK = {};\nvar RETURN = {};\nvar exports = module.exports = function (iterable, entries, fn, that, ITERATOR) {\n  var iterFn = ITERATOR ? function () { return iterable; } : core_getIteratorMethod(iterable);\n  var f = _ctx(fn, that, entries ? 2 : 1);\n  var index = 0;\n  var length, step, iterator, result;\n  if (typeof iterFn != 'function') throw TypeError(iterable + ' is not iterable!');\n  // fast case for arrays with default iterator\n  if (_isArrayIter(iterFn)) for (length = _toLength(iterable.length); length > index; index++) {\n    result = entries ? f(_anObject(step = iterable[index])[0], step[1]) : f(iterable[index]);\n    if (result === BREAK || result === RETURN) return result;\n  } else for (iterator = iterFn.call(iterable); !(step = iterator.next()).done;) {\n    result = _iterCall(iterator, f, step.value, entries);\n    if (result === BREAK || result === RETURN) return result;\n  }\n};\nexports.BREAK = BREAK;\nexports.RETURN = RETURN;\n});\n\nvar process = _global.process;\nvar setTask = _global.setImmediate;\nvar clearTask = _global.clearImmediate;\nvar MessageChannel = _global.MessageChannel;\nvar Dispatch = _global.Dispatch;\nvar counter = 0;\nvar queue = {};\nvar ONREADYSTATECHANGE = 'onreadystatechange';\nvar defer, channel, port;\nvar run = function () {\n  var id = +this;\n  // eslint-disable-next-line no-prototype-builtins\n  if (queue.hasOwnProperty(id)) {\n    var fn = queue[id];\n    delete queue[id];\n    fn();\n  }\n};\nvar listener = function (event) {\n  run.call(event.data);\n};\n// Node.js 0.9+ & IE10+ has setImmediate, otherwise:\nif (!setTask || !clearTask) {\n  setTask = function setImmediate(fn) {\n    var args = [];\n    var i = 1;\n    while (arguments.length > i) args.push(arguments[i++]);\n    queue[++counter] = function () {\n      // eslint-disable-next-line no-new-func\n      _invoke(typeof fn == 'function' ? fn : Function(fn), args);\n    };\n    defer(counter);\n    return counter;\n  };\n  clearTask = function clearImmediate(id) {\n    delete queue[id];\n  };\n  // Node.js 0.8-\n  if (_cof(process) == 'process') {\n    defer = function (id) {\n      process.nextTick(_ctx(run, id, 1));\n    };\n  // Sphere (JS game engine) Dispatch API\n  } else if (Dispatch && Dispatch.now) {\n    defer = function (id) {\n      Dispatch.now(_ctx(run, id, 1));\n    };\n  // Browsers with MessageChannel, includes WebWorkers\n  } else if (MessageChannel) {\n    channel = new MessageChannel();\n    port = channel.port2;\n    channel.port1.onmessage = listener;\n    defer = _ctx(port.postMessage, port, 1);\n  // Browsers with postMessage, skip WebWorkers\n  // IE8 has postMessage, but it's sync & typeof its postMessage is 'object'\n  } else if (_global.addEventListener && typeof postMessage == 'function' && !_global.importScripts) {\n    defer = function (id) {\n      _global.postMessage(id + '', '*');\n    };\n    _global.addEventListener('message', listener, false);\n  // IE8-\n  } else if (ONREADYSTATECHANGE in _domCreate('script')) {\n    defer = function (id) {\n      _html.appendChild(_domCreate('script'))[ONREADYSTATECHANGE] = function () {\n        _html.removeChild(this);\n        run.call(id);\n      };\n    };\n  // Rest old browsers\n  } else {\n    defer = function (id) {\n      setTimeout(_ctx(run, id, 1), 0);\n    };\n  }\n}\nvar _task = {\n  set: setTask,\n  clear: clearTask\n};\n\nvar macrotask = _task.set;\nvar Observer = _global.MutationObserver || _global.WebKitMutationObserver;\nvar process$1 = _global.process;\nvar Promise$1 = _global.Promise;\nvar isNode = _cof(process$1) == 'process';\n\nvar _microtask = function () {\n  var head, last, notify;\n\n  var flush = function () {\n    var parent, fn;\n    if (isNode && (parent = process$1.domain)) parent.exit();\n    while (head) {\n      fn = head.fn;\n      head = head.next;\n      try {\n        fn();\n      } catch (e) {\n        if (head) notify();\n        else last = undefined;\n        throw e;\n      }\n    } last = undefined;\n    if (parent) parent.enter();\n  };\n\n  // Node.js\n  if (isNode) {\n    notify = function () {\n      process$1.nextTick(flush);\n    };\n  // browsers with MutationObserver, except iOS Safari - https://github.com/zloirock/core-js/issues/339\n  } else if (Observer && !(_global.navigator && _global.navigator.standalone)) {\n    var toggle = true;\n    var node = document.createTextNode('');\n    new Observer(flush).observe(node, { characterData: true }); // eslint-disable-line no-new\n    notify = function () {\n      node.data = toggle = !toggle;\n    };\n  // environments with maybe non-completely correct, but existent Promise\n  } else if (Promise$1 && Promise$1.resolve) {\n    // Promise.resolve without an argument throws an error in LG WebOS 2\n    var promise = Promise$1.resolve(undefined);\n    notify = function () {\n      promise.then(flush);\n    };\n  // for other environments - macrotask based on:\n  // - setImmediate\n  // - MessageChannel\n  // - window.postMessag\n  // - onreadystatechange\n  // - setTimeout\n  } else {\n    notify = function () {\n      // strange IE + webpack dev server bug - use .call(global)\n      macrotask.call(_global, flush);\n    };\n  }\n\n  return function (fn) {\n    var task = { fn: fn, next: undefined };\n    if (last) last.next = task;\n    if (!head) {\n      head = task;\n      notify();\n    } last = task;\n  };\n};\n\n// 25.4.1.5 NewPromiseCapability(C)\n\n\nfunction PromiseCapability(C) {\n  var resolve, reject;\n  this.promise = new C(function ($$resolve, $$reject) {\n    if (resolve !== undefined || reject !== undefined) throw TypeError('Bad Promise constructor');\n    resolve = $$resolve;\n    reject = $$reject;\n  });\n  this.resolve = _aFunction(resolve);\n  this.reject = _aFunction(reject);\n}\n\nvar f$7 = function (C) {\n  return new PromiseCapability(C);\n};\n\nvar _newPromiseCapability = {\n\tf: f$7\n};\n\nvar _perform = function (exec) {\n  try {\n    return { e: false, v: exec() };\n  } catch (e) {\n    return { e: true, v: e };\n  }\n};\n\nvar navigator$1 = _global.navigator;\n\nvar _userAgent = navigator$1 && navigator$1.userAgent || '';\n\nvar _promiseResolve = function (C, x) {\n  _anObject(C);\n  if (_isObject(x) && x.constructor === C) return x;\n  var promiseCapability = _newPromiseCapability.f(C);\n  var resolve = promiseCapability.resolve;\n  resolve(x);\n  return promiseCapability.promise;\n};\n\nvar _redefineAll = function (target, src, safe) {\n  for (var key in src) _redefine(target, key, src[key], safe);\n  return target;\n};\n\nvar task = _task.set;\nvar microtask = _microtask();\n\n\n\n\nvar PROMISE = 'Promise';\nvar TypeError$1 = _global.TypeError;\nvar process$2 = _global.process;\nvar versions = process$2 && process$2.versions;\nvar v8 = versions && versions.v8 || '';\nvar $Promise = _global[PROMISE];\nvar isNode$1 = _classof(process$2) == 'process';\nvar empty = function () { /* empty */ };\nvar Internal, newGenericPromiseCapability, OwnPromiseCapability, Wrapper;\nvar newPromiseCapability = newGenericPromiseCapability = _newPromiseCapability.f;\n\nvar USE_NATIVE$1 = !!function () {\n  try {\n    // correct subclassing with @@species support\n    var promise = $Promise.resolve(1);\n    var FakePromise = (promise.constructor = {})[_wks('species')] = function (exec) {\n      exec(empty, empty);\n    };\n    // unhandled rejections tracking support, NodeJS Promise without it fails @@species test\n    return (isNode$1 || typeof PromiseRejectionEvent == 'function')\n      && promise.then(empty) instanceof FakePromise\n      // v8 6.6 (Node 10 and Chrome 66) have a bug with resolving custom thenables\n      // https://bugs.chromium.org/p/chromium/issues/detail?id=830565\n      // we can't detect it synchronously, so just check versions\n      && v8.indexOf('6.6') !== 0\n      && _userAgent.indexOf('Chrome/66') === -1;\n  } catch (e) { /* empty */ }\n}();\n\n// helpers\nvar isThenable = function (it) {\n  var then;\n  return _isObject(it) && typeof (then = it.then) == 'function' ? then : false;\n};\nvar notify = function (promise, isReject) {\n  if (promise._n) return;\n  promise._n = true;\n  var chain = promise._c;\n  microtask(function () {\n    var value = promise._v;\n    var ok = promise._s == 1;\n    var i = 0;\n    var run = function (reaction) {\n      var handler = ok ? reaction.ok : reaction.fail;\n      var resolve = reaction.resolve;\n      var reject = reaction.reject;\n      var domain = reaction.domain;\n      var result, then, exited;\n      try {\n        if (handler) {\n          if (!ok) {\n            if (promise._h == 2) onHandleUnhandled(promise);\n            promise._h = 1;\n          }\n          if (handler === true) result = value;\n          else {\n            if (domain) domain.enter();\n            result = handler(value); // may throw\n            if (domain) {\n              domain.exit();\n              exited = true;\n            }\n          }\n          if (result === reaction.promise) {\n            reject(TypeError$1('Promise-chain cycle'));\n          } else if (then = isThenable(result)) {\n            then.call(result, resolve, reject);\n          } else resolve(result);\n        } else reject(value);\n      } catch (e) {\n        if (domain && !exited) domain.exit();\n        reject(e);\n      }\n    };\n    while (chain.length > i) run(chain[i++]); // variable length - can't use forEach\n    promise._c = [];\n    promise._n = false;\n    if (isReject && !promise._h) onUnhandled(promise);\n  });\n};\nvar onUnhandled = function (promise) {\n  task.call(_global, function () {\n    var value = promise._v;\n    var unhandled = isUnhandled(promise);\n    var result, handler, console;\n    if (unhandled) {\n      result = _perform(function () {\n        if (isNode$1) {\n          process$2.emit('unhandledRejection', value, promise);\n        } else if (handler = _global.onunhandledrejection) {\n          handler({ promise: promise, reason: value });\n        } else if ((console = _global.console) && console.error) {\n          console.error('Unhandled promise rejection', value);\n        }\n      });\n      // Browsers should not trigger `rejectionHandled` event if it was handled here, NodeJS - should\n      promise._h = isNode$1 || isUnhandled(promise) ? 2 : 1;\n    } promise._a = undefined;\n    if (unhandled && result.e) throw result.v;\n  });\n};\nvar isUnhandled = function (promise) {\n  return promise._h !== 1 && (promise._a || promise._c).length === 0;\n};\nvar onHandleUnhandled = function (promise) {\n  task.call(_global, function () {\n    var handler;\n    if (isNode$1) {\n      process$2.emit('rejectionHandled', promise);\n    } else if (handler = _global.onrejectionhandled) {\n      handler({ promise: promise, reason: promise._v });\n    }\n  });\n};\nvar $reject = function (value) {\n  var promise = this;\n  if (promise._d) return;\n  promise._d = true;\n  promise = promise._w || promise; // unwrap\n  promise._v = value;\n  promise._s = 2;\n  if (!promise._a) promise._a = promise._c.slice();\n  notify(promise, true);\n};\nvar $resolve = function (value) {\n  var promise = this;\n  var then;\n  if (promise._d) return;\n  promise._d = true;\n  promise = promise._w || promise; // unwrap\n  try {\n    if (promise === value) throw TypeError$1(\"Promise can't be resolved itself\");\n    if (then = isThenable(value)) {\n      microtask(function () {\n        var wrapper = { _w: promise, _d: false }; // wrap\n        try {\n          then.call(value, _ctx($resolve, wrapper, 1), _ctx($reject, wrapper, 1));\n        } catch (e) {\n          $reject.call(wrapper, e);\n        }\n      });\n    } else {\n      promise._v = value;\n      promise._s = 1;\n      notify(promise, false);\n    }\n  } catch (e) {\n    $reject.call({ _w: promise, _d: false }, e); // wrap\n  }\n};\n\n// constructor polyfill\nif (!USE_NATIVE$1) {\n  // 25.4.3.1 Promise(executor)\n  $Promise = function Promise(executor) {\n    _anInstance(this, $Promise, PROMISE, '_h');\n    _aFunction(executor);\n    Internal.call(this);\n    try {\n      executor(_ctx($resolve, this, 1), _ctx($reject, this, 1));\n    } catch (err) {\n      $reject.call(this, err);\n    }\n  };\n  // eslint-disable-next-line no-unused-vars\n  Internal = function Promise(executor) {\n    this._c = [];             // <- awaiting reactions\n    this._a = undefined;      // <- checked in isUnhandled reactions\n    this._s = 0;              // <- state\n    this._d = false;          // <- done\n    this._v = undefined;      // <- value\n    this._h = 0;              // <- rejection state, 0 - default, 1 - handled, 2 - unhandled\n    this._n = false;          // <- notify\n  };\n  Internal.prototype = _redefineAll($Promise.prototype, {\n    // 25.4.5.3 Promise.prototype.then(onFulfilled, onRejected)\n    then: function then(onFulfilled, onRejected) {\n      var reaction = newPromiseCapability(_speciesConstructor(this, $Promise));\n      reaction.ok = typeof onFulfilled == 'function' ? onFulfilled : true;\n      reaction.fail = typeof onRejected == 'function' && onRejected;\n      reaction.domain = isNode$1 ? process$2.domain : undefined;\n      this._c.push(reaction);\n      if (this._a) this._a.push(reaction);\n      if (this._s) notify(this, false);\n      return reaction.promise;\n    },\n    // 25.4.5.1 Promise.prototype.catch(onRejected)\n    'catch': function (onRejected) {\n      return this.then(undefined, onRejected);\n    }\n  });\n  OwnPromiseCapability = function () {\n    var promise = new Internal();\n    this.promise = promise;\n    this.resolve = _ctx($resolve, promise, 1);\n    this.reject = _ctx($reject, promise, 1);\n  };\n  _newPromiseCapability.f = newPromiseCapability = function (C) {\n    return C === $Promise || C === Wrapper\n      ? new OwnPromiseCapability(C)\n      : newGenericPromiseCapability(C);\n  };\n}\n\n_export(_export.G + _export.W + _export.F * !USE_NATIVE$1, { Promise: $Promise });\n_setToStringTag($Promise, PROMISE);\n_setSpecies(PROMISE);\nWrapper = _core[PROMISE];\n\n// statics\n_export(_export.S + _export.F * !USE_NATIVE$1, PROMISE, {\n  // 25.4.4.5 Promise.reject(r)\n  reject: function reject(r) {\n    var capability = newPromiseCapability(this);\n    var $$reject = capability.reject;\n    $$reject(r);\n    return capability.promise;\n  }\n});\n_export(_export.S + _export.F * ( !USE_NATIVE$1), PROMISE, {\n  // 25.4.4.6 Promise.resolve(x)\n  resolve: function resolve(x) {\n    return _promiseResolve( this, x);\n  }\n});\n_export(_export.S + _export.F * !(USE_NATIVE$1 && _iterDetect(function (iter) {\n  $Promise.all(iter)['catch'](empty);\n})), PROMISE, {\n  // 25.4.4.1 Promise.all(iterable)\n  all: function all(iterable) {\n    var C = this;\n    var capability = newPromiseCapability(C);\n    var resolve = capability.resolve;\n    var reject = capability.reject;\n    var result = _perform(function () {\n      var values = [];\n      var index = 0;\n      var remaining = 1;\n      _forOf(iterable, false, function (promise) {\n        var $index = index++;\n        var alreadyCalled = false;\n        values.push(undefined);\n        remaining++;\n        C.resolve(promise).then(function (value) {\n          if (alreadyCalled) return;\n          alreadyCalled = true;\n          values[$index] = value;\n          --remaining || resolve(values);\n        }, reject);\n      });\n      --remaining || resolve(values);\n    });\n    if (result.e) reject(result.v);\n    return capability.promise;\n  },\n  // 25.4.4.4 Promise.race(iterable)\n  race: function race(iterable) {\n    var C = this;\n    var capability = newPromiseCapability(C);\n    var reject = capability.reject;\n    var result = _perform(function () {\n      _forOf(iterable, false, function (promise) {\n        C.resolve(promise).then(capability.resolve, reject);\n      });\n    });\n    if (result.e) reject(result.v);\n    return capability.promise;\n  }\n});\n\nvar _validateCollection = function (it, TYPE) {\n  if (!_isObject(it) || it._t !== TYPE) throw TypeError('Incompatible receiver, ' + TYPE + ' required!');\n  return it;\n};\n\nvar dP$5 = _objectDp.f;\n\n\n\n\n\n\n\n\n\nvar fastKey = _meta.fastKey;\n\nvar SIZE = _descriptors ? '_s' : 'size';\n\nvar getEntry = function (that, key) {\n  // fast case\n  var index = fastKey(key);\n  var entry;\n  if (index !== 'F') return that._i[index];\n  // frozen object case\n  for (entry = that._f; entry; entry = entry.n) {\n    if (entry.k == key) return entry;\n  }\n};\n\nvar _collectionStrong = {\n  getConstructor: function (wrapper, NAME, IS_MAP, ADDER) {\n    var C = wrapper(function (that, iterable) {\n      _anInstance(that, C, NAME, '_i');\n      that._t = NAME;         // collection type\n      that._i = _objectCreate(null); // index\n      that._f = undefined;    // first entry\n      that._l = undefined;    // last entry\n      that[SIZE] = 0;         // size\n      if (iterable != undefined) _forOf(iterable, IS_MAP, that[ADDER], that);\n    });\n    _redefineAll(C.prototype, {\n      // 23.1.3.1 Map.prototype.clear()\n      // 23.2.3.2 Set.prototype.clear()\n      clear: function clear() {\n        for (var that = _validateCollection(this, NAME), data = that._i, entry = that._f; entry; entry = entry.n) {\n          entry.r = true;\n          if (entry.p) entry.p = entry.p.n = undefined;\n          delete data[entry.i];\n        }\n        that._f = that._l = undefined;\n        that[SIZE] = 0;\n      },\n      // 23.1.3.3 Map.prototype.delete(key)\n      // 23.2.3.4 Set.prototype.delete(value)\n      'delete': function (key) {\n        var that = _validateCollection(this, NAME);\n        var entry = getEntry(that, key);\n        if (entry) {\n          var next = entry.n;\n          var prev = entry.p;\n          delete that._i[entry.i];\n          entry.r = true;\n          if (prev) prev.n = next;\n          if (next) next.p = prev;\n          if (that._f == entry) that._f = next;\n          if (that._l == entry) that._l = prev;\n          that[SIZE]--;\n        } return !!entry;\n      },\n      // 23.2.3.6 Set.prototype.forEach(callbackfn, thisArg = undefined)\n      // 23.1.3.5 Map.prototype.forEach(callbackfn, thisArg = undefined)\n      forEach: function forEach(callbackfn /* , that = undefined */) {\n        _validateCollection(this, NAME);\n        var f = _ctx(callbackfn, arguments.length > 1 ? arguments[1] : undefined, 3);\n        var entry;\n        while (entry = entry ? entry.n : this._f) {\n          f(entry.v, entry.k, this);\n          // revert to the last existing entry\n          while (entry && entry.r) entry = entry.p;\n        }\n      },\n      // 23.1.3.7 Map.prototype.has(key)\n      // 23.2.3.7 Set.prototype.has(value)\n      has: function has(key) {\n        return !!getEntry(_validateCollection(this, NAME), key);\n      }\n    });\n    if (_descriptors) dP$5(C.prototype, 'size', {\n      get: function () {\n        return _validateCollection(this, NAME)[SIZE];\n      }\n    });\n    return C;\n  },\n  def: function (that, key, value) {\n    var entry = getEntry(that, key);\n    var prev, index;\n    // change existing entry\n    if (entry) {\n      entry.v = value;\n    // create new entry\n    } else {\n      that._l = entry = {\n        i: index = fastKey(key, true), // <- index\n        k: key,                        // <- key\n        v: value,                      // <- value\n        p: prev = that._l,             // <- previous entry\n        n: undefined,                  // <- next entry\n        r: false                       // <- removed\n      };\n      if (!that._f) that._f = entry;\n      if (prev) prev.n = entry;\n      that[SIZE]++;\n      // add to index\n      if (index !== 'F') that._i[index] = entry;\n    } return that;\n  },\n  getEntry: getEntry,\n  setStrong: function (C, NAME, IS_MAP) {\n    // add .keys, .values, .entries, [@@iterator]\n    // 23.1.3.4, 23.1.3.8, 23.1.3.11, 23.1.3.12, 23.2.3.5, 23.2.3.8, 23.2.3.10, 23.2.3.11\n    _iterDefine(C, NAME, function (iterated, kind) {\n      this._t = _validateCollection(iterated, NAME); // target\n      this._k = kind;                     // kind\n      this._l = undefined;                // previous\n    }, function () {\n      var that = this;\n      var kind = that._k;\n      var entry = that._l;\n      // revert to the last existing entry\n      while (entry && entry.r) entry = entry.p;\n      // get next entry\n      if (!that._t || !(that._l = entry = entry ? entry.n : that._t._f)) {\n        // or finish the iteration\n        that._t = undefined;\n        return _iterStep(1);\n      }\n      // return step by kind\n      if (kind == 'keys') return _iterStep(0, entry.k);\n      if (kind == 'values') return _iterStep(0, entry.v);\n      return _iterStep(0, [entry.k, entry.v]);\n    }, IS_MAP ? 'entries' : 'values', !IS_MAP, true);\n\n    // add [@@species], 23.1.2.2, 23.2.2.2\n    _setSpecies(NAME);\n  }\n};\n\nvar _collection = function (NAME, wrapper, methods, common, IS_MAP, IS_WEAK) {\n  var Base = _global[NAME];\n  var C = Base;\n  var ADDER = IS_MAP ? 'set' : 'add';\n  var proto = C && C.prototype;\n  var O = {};\n  var fixMethod = function (KEY) {\n    var fn = proto[KEY];\n    _redefine(proto, KEY,\n      KEY == 'delete' ? function (a) {\n        return IS_WEAK && !_isObject(a) ? false : fn.call(this, a === 0 ? 0 : a);\n      } : KEY == 'has' ? function has(a) {\n        return IS_WEAK && !_isObject(a) ? false : fn.call(this, a === 0 ? 0 : a);\n      } : KEY == 'get' ? function get(a) {\n        return IS_WEAK && !_isObject(a) ? undefined : fn.call(this, a === 0 ? 0 : a);\n      } : KEY == 'add' ? function add(a) { fn.call(this, a === 0 ? 0 : a); return this; }\n        : function set(a, b) { fn.call(this, a === 0 ? 0 : a, b); return this; }\n    );\n  };\n  if (typeof C != 'function' || !(IS_WEAK || proto.forEach && !_fails(function () {\n    new C().entries().next();\n  }))) {\n    // create collection constructor\n    C = common.getConstructor(wrapper, NAME, IS_MAP, ADDER);\n    _redefineAll(C.prototype, methods);\n    _meta.NEED = true;\n  } else {\n    var instance = new C();\n    // early implementations not supports chaining\n    var HASNT_CHAINING = instance[ADDER](IS_WEAK ? {} : -0, 1) != instance;\n    // V8 ~  Chromium 40- weak-collections throws on primitives, but should return false\n    var THROWS_ON_PRIMITIVES = _fails(function () { instance.has(1); });\n    // most early implementations doesn't supports iterables, most modern - not close it correctly\n    var ACCEPT_ITERABLES = _iterDetect(function (iter) { new C(iter); }); // eslint-disable-line no-new\n    // for early implementations -0 and +0 not the same\n    var BUGGY_ZERO = !IS_WEAK && _fails(function () {\n      // V8 ~ Chromium 42- fails only with 5+ elements\n      var $instance = new C();\n      var index = 5;\n      while (index--) $instance[ADDER](index, index);\n      return !$instance.has(-0);\n    });\n    if (!ACCEPT_ITERABLES) {\n      C = wrapper(function (target, iterable) {\n        _anInstance(target, C, NAME);\n        var that = _inheritIfRequired(new Base(), target, C);\n        if (iterable != undefined) _forOf(iterable, IS_MAP, that[ADDER], that);\n        return that;\n      });\n      C.prototype = proto;\n      proto.constructor = C;\n    }\n    if (THROWS_ON_PRIMITIVES || BUGGY_ZERO) {\n      fixMethod('delete');\n      fixMethod('has');\n      IS_MAP && fixMethod('get');\n    }\n    if (BUGGY_ZERO || HASNT_CHAINING) fixMethod(ADDER);\n    // weak collections should not contains .clear method\n    if (IS_WEAK && proto.clear) delete proto.clear;\n  }\n\n  _setToStringTag(C, NAME);\n\n  O[NAME] = C;\n  _export(_export.G + _export.W + _export.F * (C != Base), O);\n\n  if (!IS_WEAK) common.setStrong(C, NAME, IS_MAP);\n\n  return C;\n};\n\nvar MAP = 'Map';\n\n// 23.1 Map Objects\nvar es6_map = _collection(MAP, function (get) {\n  return function Map() { return get(this, arguments.length > 0 ? arguments[0] : undefined); };\n}, {\n  // 23.1.3.6 Map.prototype.get(key)\n  get: function get(key) {\n    var entry = _collectionStrong.getEntry(_validateCollection(this, MAP), key);\n    return entry && entry.v;\n  },\n  // 23.1.3.9 Map.prototype.set(key, value)\n  set: function set(key, value) {\n    return _collectionStrong.def(_validateCollection(this, MAP), key === 0 ? 0 : key, value);\n  }\n}, _collectionStrong, true);\n\nvar SET = 'Set';\n\n// 23.2 Set Objects\nvar es6_set = _collection(SET, function (get) {\n  return function Set() { return get(this, arguments.length > 0 ? arguments[0] : undefined); };\n}, {\n  // 23.2.3.1 Set.prototype.add(value)\n  add: function add(value) {\n    return _collectionStrong.def(_validateCollection(this, SET), value = value === 0 ? 0 : value, value);\n  }\n}, _collectionStrong);\n\nvar getWeak = _meta.getWeak;\n\n\n\n\n\n\n\nvar arrayFind = _arrayMethods(5);\nvar arrayFindIndex = _arrayMethods(6);\nvar id$1 = 0;\n\n// fallback for uncaught frozen keys\nvar uncaughtFrozenStore = function (that) {\n  return that._l || (that._l = new UncaughtFrozenStore());\n};\nvar UncaughtFrozenStore = function () {\n  this.a = [];\n};\nvar findUncaughtFrozen = function (store, key) {\n  return arrayFind(store.a, function (it) {\n    return it[0] === key;\n  });\n};\nUncaughtFrozenStore.prototype = {\n  get: function (key) {\n    var entry = findUncaughtFrozen(this, key);\n    if (entry) return entry[1];\n  },\n  has: function (key) {\n    return !!findUncaughtFrozen(this, key);\n  },\n  set: function (key, value) {\n    var entry = findUncaughtFrozen(this, key);\n    if (entry) entry[1] = value;\n    else this.a.push([key, value]);\n  },\n  'delete': function (key) {\n    var index = arrayFindIndex(this.a, function (it) {\n      return it[0] === key;\n    });\n    if (~index) this.a.splice(index, 1);\n    return !!~index;\n  }\n};\n\nvar _collectionWeak = {\n  getConstructor: function (wrapper, NAME, IS_MAP, ADDER) {\n    var C = wrapper(function (that, iterable) {\n      _anInstance(that, C, NAME, '_i');\n      that._t = NAME;      // collection type\n      that._i = id$1++;      // collection id\n      that._l = undefined; // leak store for uncaught frozen objects\n      if (iterable != undefined) _forOf(iterable, IS_MAP, that[ADDER], that);\n    });\n    _redefineAll(C.prototype, {\n      // 23.3.3.2 WeakMap.prototype.delete(key)\n      // 23.4.3.3 WeakSet.prototype.delete(value)\n      'delete': function (key) {\n        if (!_isObject(key)) return false;\n        var data = getWeak(key);\n        if (data === true) return uncaughtFrozenStore(_validateCollection(this, NAME))['delete'](key);\n        return data && _has(data, this._i) && delete data[this._i];\n      },\n      // 23.3.3.4 WeakMap.prototype.has(key)\n      // 23.4.3.4 WeakSet.prototype.has(value)\n      has: function has(key) {\n        if (!_isObject(key)) return false;\n        var data = getWeak(key);\n        if (data === true) return uncaughtFrozenStore(_validateCollection(this, NAME)).has(key);\n        return data && _has(data, this._i);\n      }\n    });\n    return C;\n  },\n  def: function (that, key, value) {\n    var data = getWeak(_anObject(key), true);\n    if (data === true) uncaughtFrozenStore(that).set(key, value);\n    else data[that._i] = value;\n    return that;\n  },\n  ufstore: uncaughtFrozenStore\n};\n\nvar es6_weakMap = createCommonjsModule(function (module) {\n\nvar each = _arrayMethods(0);\n\n\n\n\n\n\nvar NATIVE_WEAK_MAP = _validateCollection;\nvar IS_IE11 = !_global.ActiveXObject && 'ActiveXObject' in _global;\nvar WEAK_MAP = 'WeakMap';\nvar getWeak = _meta.getWeak;\nvar isExtensible = Object.isExtensible;\nvar uncaughtFrozenStore = _collectionWeak.ufstore;\nvar InternalMap;\n\nvar wrapper = function (get) {\n  return function WeakMap() {\n    return get(this, arguments.length > 0 ? arguments[0] : undefined);\n  };\n};\n\nvar methods = {\n  // 23.3.3.3 WeakMap.prototype.get(key)\n  get: function get(key) {\n    if (_isObject(key)) {\n      var data = getWeak(key);\n      if (data === true) return uncaughtFrozenStore(_validateCollection(this, WEAK_MAP)).get(key);\n      return data ? data[this._i] : undefined;\n    }\n  },\n  // 23.3.3.5 WeakMap.prototype.set(key, value)\n  set: function set(key, value) {\n    return _collectionWeak.def(_validateCollection(this, WEAK_MAP), key, value);\n  }\n};\n\n// 23.3 WeakMap Objects\nvar $WeakMap = module.exports = _collection(WEAK_MAP, wrapper, methods, _collectionWeak, true, true);\n\n// IE11 WeakMap frozen keys fix\nif (NATIVE_WEAK_MAP && IS_IE11) {\n  InternalMap = _collectionWeak.getConstructor(wrapper, WEAK_MAP);\n  _objectAssign(InternalMap.prototype, methods);\n  _meta.NEED = true;\n  each(['delete', 'has', 'get', 'set'], function (key) {\n    var proto = $WeakMap.prototype;\n    var method = proto[key];\n    _redefine(proto, key, function (a, b) {\n      // store frozen objects on internal weakmap shim\n      if (_isObject(a) && !isExtensible(a)) {\n        if (!this._f) this._f = new InternalMap();\n        var result = this._f[key](a, b);\n        return key == 'set' ? this : result;\n      // store all the rest on native weakmap\n      } return method.call(this, a, b);\n    });\n  });\n}\n});\n\nvar WEAK_SET = 'WeakSet';\n\n// 23.4 WeakSet Objects\n_collection(WEAK_SET, function (get) {\n  return function WeakSet() { return get(this, arguments.length > 0 ? arguments[0] : undefined); };\n}, {\n  // 23.4.3.1 WeakSet.prototype.add(value)\n  add: function add(value) {\n    return _collectionWeak.def(_validateCollection(this, WEAK_SET), value, true);\n  }\n}, _collectionWeak, false, true);\n\nvar TYPED = _uid('typed_array');\nvar VIEW = _uid('view');\nvar ABV = !!(_global.ArrayBuffer && _global.DataView);\nvar CONSTR = ABV;\nvar i$1 = 0;\nvar l = 9;\nvar Typed;\n\nvar TypedArrayConstructors = (\n  'Int8Array,Uint8Array,Uint8ClampedArray,Int16Array,Uint16Array,Int32Array,Uint32Array,Float32Array,Float64Array'\n).split(',');\n\nwhile (i$1 < l) {\n  if (Typed = _global[TypedArrayConstructors[i$1++]]) {\n    _hide(Typed.prototype, TYPED, true);\n    _hide(Typed.prototype, VIEW, true);\n  } else CONSTR = false;\n}\n\nvar _typed = {\n  ABV: ABV,\n  CONSTR: CONSTR,\n  TYPED: TYPED,\n  VIEW: VIEW\n};\n\n// https://tc39.github.io/ecma262/#sec-toindex\n\n\nvar _toIndex = function (it) {\n  if (it === undefined) return 0;\n  var number = _toInteger(it);\n  var length = _toLength(number);\n  if (number !== length) throw RangeError('Wrong length!');\n  return length;\n};\n\nvar _typedBuffer = createCommonjsModule(function (module, exports) {\n\n\n\n\n\n\n\n\n\n\n\nvar gOPN = _objectGopn.f;\nvar dP = _objectDp.f;\n\n\nvar ARRAY_BUFFER = 'ArrayBuffer';\nvar DATA_VIEW = 'DataView';\nvar PROTOTYPE = 'prototype';\nvar WRONG_LENGTH = 'Wrong length!';\nvar WRONG_INDEX = 'Wrong index!';\nvar $ArrayBuffer = _global[ARRAY_BUFFER];\nvar $DataView = _global[DATA_VIEW];\nvar Math = _global.Math;\nvar RangeError = _global.RangeError;\n// eslint-disable-next-line no-shadow-restricted-names\nvar Infinity = _global.Infinity;\nvar BaseBuffer = $ArrayBuffer;\nvar abs = Math.abs;\nvar pow = Math.pow;\nvar floor = Math.floor;\nvar log = Math.log;\nvar LN2 = Math.LN2;\nvar BUFFER = 'buffer';\nvar BYTE_LENGTH = 'byteLength';\nvar BYTE_OFFSET = 'byteOffset';\nvar $BUFFER = _descriptors ? '_b' : BUFFER;\nvar $LENGTH = _descriptors ? '_l' : BYTE_LENGTH;\nvar $OFFSET = _descriptors ? '_o' : BYTE_OFFSET;\n\n// IEEE754 conversions based on https://github.com/feross/ieee754\nfunction packIEEE754(value, mLen, nBytes) {\n  var buffer = new Array(nBytes);\n  var eLen = nBytes * 8 - mLen - 1;\n  var eMax = (1 << eLen) - 1;\n  var eBias = eMax >> 1;\n  var rt = mLen === 23 ? pow(2, -24) - pow(2, -77) : 0;\n  var i = 0;\n  var s = value < 0 || value === 0 && 1 / value < 0 ? 1 : 0;\n  var e, m, c;\n  value = abs(value);\n  // eslint-disable-next-line no-self-compare\n  if (value != value || value === Infinity) {\n    // eslint-disable-next-line no-self-compare\n    m = value != value ? 1 : 0;\n    e = eMax;\n  } else {\n    e = floor(log(value) / LN2);\n    if (value * (c = pow(2, -e)) < 1) {\n      e--;\n      c *= 2;\n    }\n    if (e + eBias >= 1) {\n      value += rt / c;\n    } else {\n      value += rt * pow(2, 1 - eBias);\n    }\n    if (value * c >= 2) {\n      e++;\n      c /= 2;\n    }\n    if (e + eBias >= eMax) {\n      m = 0;\n      e = eMax;\n    } else if (e + eBias >= 1) {\n      m = (value * c - 1) * pow(2, mLen);\n      e = e + eBias;\n    } else {\n      m = value * pow(2, eBias - 1) * pow(2, mLen);\n      e = 0;\n    }\n  }\n  for (; mLen >= 8; buffer[i++] = m & 255, m /= 256, mLen -= 8);\n  e = e << mLen | m;\n  eLen += mLen;\n  for (; eLen > 0; buffer[i++] = e & 255, e /= 256, eLen -= 8);\n  buffer[--i] |= s * 128;\n  return buffer;\n}\nfunction unpackIEEE754(buffer, mLen, nBytes) {\n  var eLen = nBytes * 8 - mLen - 1;\n  var eMax = (1 << eLen) - 1;\n  var eBias = eMax >> 1;\n  var nBits = eLen - 7;\n  var i = nBytes - 1;\n  var s = buffer[i--];\n  var e = s & 127;\n  var m;\n  s >>= 7;\n  for (; nBits > 0; e = e * 256 + buffer[i], i--, nBits -= 8);\n  m = e & (1 << -nBits) - 1;\n  e >>= -nBits;\n  nBits += mLen;\n  for (; nBits > 0; m = m * 256 + buffer[i], i--, nBits -= 8);\n  if (e === 0) {\n    e = 1 - eBias;\n  } else if (e === eMax) {\n    return m ? NaN : s ? -Infinity : Infinity;\n  } else {\n    m = m + pow(2, mLen);\n    e = e - eBias;\n  } return (s ? -1 : 1) * m * pow(2, e - mLen);\n}\n\nfunction unpackI32(bytes) {\n  return bytes[3] << 24 | bytes[2] << 16 | bytes[1] << 8 | bytes[0];\n}\nfunction packI8(it) {\n  return [it & 0xff];\n}\nfunction packI16(it) {\n  return [it & 0xff, it >> 8 & 0xff];\n}\nfunction packI32(it) {\n  return [it & 0xff, it >> 8 & 0xff, it >> 16 & 0xff, it >> 24 & 0xff];\n}\nfunction packF64(it) {\n  return packIEEE754(it, 52, 8);\n}\nfunction packF32(it) {\n  return packIEEE754(it, 23, 4);\n}\n\nfunction addGetter(C, key, internal) {\n  dP(C[PROTOTYPE], key, { get: function () { return this[internal]; } });\n}\n\nfunction get(view, bytes, index, isLittleEndian) {\n  var numIndex = +index;\n  var intIndex = _toIndex(numIndex);\n  if (intIndex + bytes > view[$LENGTH]) throw RangeError(WRONG_INDEX);\n  var store = view[$BUFFER]._b;\n  var start = intIndex + view[$OFFSET];\n  var pack = store.slice(start, start + bytes);\n  return isLittleEndian ? pack : pack.reverse();\n}\nfunction set(view, bytes, index, conversion, value, isLittleEndian) {\n  var numIndex = +index;\n  var intIndex = _toIndex(numIndex);\n  if (intIndex + bytes > view[$LENGTH]) throw RangeError(WRONG_INDEX);\n  var store = view[$BUFFER]._b;\n  var start = intIndex + view[$OFFSET];\n  var pack = conversion(+value);\n  for (var i = 0; i < bytes; i++) store[start + i] = pack[isLittleEndian ? i : bytes - i - 1];\n}\n\nif (!_typed.ABV) {\n  $ArrayBuffer = function ArrayBuffer(length) {\n    _anInstance(this, $ArrayBuffer, ARRAY_BUFFER);\n    var byteLength = _toIndex(length);\n    this._b = _arrayFill.call(new Array(byteLength), 0);\n    this[$LENGTH] = byteLength;\n  };\n\n  $DataView = function DataView(buffer, byteOffset, byteLength) {\n    _anInstance(this, $DataView, DATA_VIEW);\n    _anInstance(buffer, $ArrayBuffer, DATA_VIEW);\n    var bufferLength = buffer[$LENGTH];\n    var offset = _toInteger(byteOffset);\n    if (offset < 0 || offset > bufferLength) throw RangeError('Wrong offset!');\n    byteLength = byteLength === undefined ? bufferLength - offset : _toLength(byteLength);\n    if (offset + byteLength > bufferLength) throw RangeError(WRONG_LENGTH);\n    this[$BUFFER] = buffer;\n    this[$OFFSET] = offset;\n    this[$LENGTH] = byteLength;\n  };\n\n  if (_descriptors) {\n    addGetter($ArrayBuffer, BYTE_LENGTH, '_l');\n    addGetter($DataView, BUFFER, '_b');\n    addGetter($DataView, BYTE_LENGTH, '_l');\n    addGetter($DataView, BYTE_OFFSET, '_o');\n  }\n\n  _redefineAll($DataView[PROTOTYPE], {\n    getInt8: function getInt8(byteOffset) {\n      return get(this, 1, byteOffset)[0] << 24 >> 24;\n    },\n    getUint8: function getUint8(byteOffset) {\n      return get(this, 1, byteOffset)[0];\n    },\n    getInt16: function getInt16(byteOffset /* , littleEndian */) {\n      var bytes = get(this, 2, byteOffset, arguments[1]);\n      return (bytes[1] << 8 | bytes[0]) << 16 >> 16;\n    },\n    getUint16: function getUint16(byteOffset /* , littleEndian */) {\n      var bytes = get(this, 2, byteOffset, arguments[1]);\n      return bytes[1] << 8 | bytes[0];\n    },\n    getInt32: function getInt32(byteOffset /* , littleEndian */) {\n      return unpackI32(get(this, 4, byteOffset, arguments[1]));\n    },\n    getUint32: function getUint32(byteOffset /* , littleEndian */) {\n      return unpackI32(get(this, 4, byteOffset, arguments[1])) >>> 0;\n    },\n    getFloat32: function getFloat32(byteOffset /* , littleEndian */) {\n      return unpackIEEE754(get(this, 4, byteOffset, arguments[1]), 23, 4);\n    },\n    getFloat64: function getFloat64(byteOffset /* , littleEndian */) {\n      return unpackIEEE754(get(this, 8, byteOffset, arguments[1]), 52, 8);\n    },\n    setInt8: function setInt8(byteOffset, value) {\n      set(this, 1, byteOffset, packI8, value);\n    },\n    setUint8: function setUint8(byteOffset, value) {\n      set(this, 1, byteOffset, packI8, value);\n    },\n    setInt16: function setInt16(byteOffset, value /* , littleEndian */) {\n      set(this, 2, byteOffset, packI16, value, arguments[2]);\n    },\n    setUint16: function setUint16(byteOffset, value /* , littleEndian */) {\n      set(this, 2, byteOffset, packI16, value, arguments[2]);\n    },\n    setInt32: function setInt32(byteOffset, value /* , littleEndian */) {\n      set(this, 4, byteOffset, packI32, value, arguments[2]);\n    },\n    setUint32: function setUint32(byteOffset, value /* , littleEndian */) {\n      set(this, 4, byteOffset, packI32, value, arguments[2]);\n    },\n    setFloat32: function setFloat32(byteOffset, value /* , littleEndian */) {\n      set(this, 4, byteOffset, packF32, value, arguments[2]);\n    },\n    setFloat64: function setFloat64(byteOffset, value /* , littleEndian */) {\n      set(this, 8, byteOffset, packF64, value, arguments[2]);\n    }\n  });\n} else {\n  if (!_fails(function () {\n    $ArrayBuffer(1);\n  }) || !_fails(function () {\n    new $ArrayBuffer(-1); // eslint-disable-line no-new\n  }) || _fails(function () {\n    new $ArrayBuffer(); // eslint-disable-line no-new\n    new $ArrayBuffer(1.5); // eslint-disable-line no-new\n    new $ArrayBuffer(NaN); // eslint-disable-line no-new\n    return $ArrayBuffer.name != ARRAY_BUFFER;\n  })) {\n    $ArrayBuffer = function ArrayBuffer(length) {\n      _anInstance(this, $ArrayBuffer);\n      return new BaseBuffer(_toIndex(length));\n    };\n    var ArrayBufferProto = $ArrayBuffer[PROTOTYPE] = BaseBuffer[PROTOTYPE];\n    for (var keys = gOPN(BaseBuffer), j = 0, key; keys.length > j;) {\n      if (!((key = keys[j++]) in $ArrayBuffer)) _hide($ArrayBuffer, key, BaseBuffer[key]);\n    }\n    ArrayBufferProto.constructor = $ArrayBuffer;\n  }\n  // iOS Safari 7.x bug\n  var view = new $DataView(new $ArrayBuffer(2));\n  var $setInt8 = $DataView[PROTOTYPE].setInt8;\n  view.setInt8(0, 2147483648);\n  view.setInt8(1, 2147483649);\n  if (view.getInt8(0) || !view.getInt8(1)) _redefineAll($DataView[PROTOTYPE], {\n    setInt8: function setInt8(byteOffset, value) {\n      $setInt8.call(this, byteOffset, value << 24 >> 24);\n    },\n    setUint8: function setUint8(byteOffset, value) {\n      $setInt8.call(this, byteOffset, value << 24 >> 24);\n    }\n  }, true);\n}\n_setToStringTag($ArrayBuffer, ARRAY_BUFFER);\n_setToStringTag($DataView, DATA_VIEW);\n_hide($DataView[PROTOTYPE], _typed.VIEW, true);\nexports[ARRAY_BUFFER] = $ArrayBuffer;\nexports[DATA_VIEW] = $DataView;\n});\n\nvar ArrayBuffer$1 = _global.ArrayBuffer;\n\nvar $ArrayBuffer = _typedBuffer.ArrayBuffer;\nvar $DataView = _typedBuffer.DataView;\nvar $isView = _typed.ABV && ArrayBuffer$1.isView;\nvar $slice = $ArrayBuffer.prototype.slice;\nvar VIEW$1 = _typed.VIEW;\nvar ARRAY_BUFFER = 'ArrayBuffer';\n\n_export(_export.G + _export.W + _export.F * (ArrayBuffer$1 !== $ArrayBuffer), { ArrayBuffer: $ArrayBuffer });\n\n_export(_export.S + _export.F * !_typed.CONSTR, ARRAY_BUFFER, {\n  // 24.1.3.1 ArrayBuffer.isView(arg)\n  isView: function isView(it) {\n    return $isView && $isView(it) || _isObject(it) && VIEW$1 in it;\n  }\n});\n\n_export(_export.P + _export.U + _export.F * _fails(function () {\n  return !new $ArrayBuffer(2).slice(1, undefined).byteLength;\n}), ARRAY_BUFFER, {\n  // 24.1.4.3 ArrayBuffer.prototype.slice(start, end)\n  slice: function slice(start, end) {\n    if ($slice !== undefined && end === undefined) return $slice.call(_anObject(this), start); // FF fix\n    var len = _anObject(this).byteLength;\n    var first = _toAbsoluteIndex(start, len);\n    var fin = _toAbsoluteIndex(end === undefined ? len : end, len);\n    var result = new (_speciesConstructor(this, $ArrayBuffer))(_toLength(fin - first));\n    var viewS = new $DataView(this);\n    var viewT = new $DataView(result);\n    var index = 0;\n    while (first < fin) {\n      viewT.setUint8(index++, viewS.getUint8(first++));\n    } return result;\n  }\n});\n\n_setSpecies(ARRAY_BUFFER);\n\n_export(_export.G + _export.W + _export.F * !_typed.ABV, {\n  DataView: _typedBuffer.DataView\n});\n\nvar _typedArray = createCommonjsModule(function (module) {\nif (_descriptors) {\n  var LIBRARY = _library;\n  var global = _global;\n  var fails = _fails;\n  var $export = _export;\n  var $typed = _typed;\n  var $buffer = _typedBuffer;\n  var ctx = _ctx;\n  var anInstance = _anInstance;\n  var propertyDesc = _propertyDesc;\n  var hide = _hide;\n  var redefineAll = _redefineAll;\n  var toInteger = _toInteger;\n  var toLength = _toLength;\n  var toIndex = _toIndex;\n  var toAbsoluteIndex = _toAbsoluteIndex;\n  var toPrimitive = _toPrimitive;\n  var has = _has;\n  var classof = _classof;\n  var isObject = _isObject;\n  var toObject = _toObject;\n  var isArrayIter = _isArrayIter;\n  var create = _objectCreate;\n  var getPrototypeOf = _objectGpo;\n  var gOPN = _objectGopn.f;\n  var getIterFn = core_getIteratorMethod;\n  var uid = _uid;\n  var wks = _wks;\n  var createArrayMethod = _arrayMethods;\n  var createArrayIncludes = _arrayIncludes;\n  var speciesConstructor = _speciesConstructor;\n  var ArrayIterators = es6_array_iterator;\n  var Iterators = _iterators;\n  var $iterDetect = _iterDetect;\n  var setSpecies = _setSpecies;\n  var arrayFill = _arrayFill;\n  var arrayCopyWithin = _arrayCopyWithin;\n  var $DP = _objectDp;\n  var $GOPD = _objectGopd;\n  var dP = $DP.f;\n  var gOPD = $GOPD.f;\n  var RangeError = global.RangeError;\n  var TypeError = global.TypeError;\n  var Uint8Array = global.Uint8Array;\n  var ARRAY_BUFFER = 'ArrayBuffer';\n  var SHARED_BUFFER = 'Shared' + ARRAY_BUFFER;\n  var BYTES_PER_ELEMENT = 'BYTES_PER_ELEMENT';\n  var PROTOTYPE = 'prototype';\n  var ArrayProto = Array[PROTOTYPE];\n  var $ArrayBuffer = $buffer.ArrayBuffer;\n  var $DataView = $buffer.DataView;\n  var arrayForEach = createArrayMethod(0);\n  var arrayFilter = createArrayMethod(2);\n  var arraySome = createArrayMethod(3);\n  var arrayEvery = createArrayMethod(4);\n  var arrayFind = createArrayMethod(5);\n  var arrayFindIndex = createArrayMethod(6);\n  var arrayIncludes = createArrayIncludes(true);\n  var arrayIndexOf = createArrayIncludes(false);\n  var arrayValues = ArrayIterators.values;\n  var arrayKeys = ArrayIterators.keys;\n  var arrayEntries = ArrayIterators.entries;\n  var arrayLastIndexOf = ArrayProto.lastIndexOf;\n  var arrayReduce = ArrayProto.reduce;\n  var arrayReduceRight = ArrayProto.reduceRight;\n  var arrayJoin = ArrayProto.join;\n  var arraySort = ArrayProto.sort;\n  var arraySlice = ArrayProto.slice;\n  var arrayToString = ArrayProto.toString;\n  var arrayToLocaleString = ArrayProto.toLocaleString;\n  var ITERATOR = wks('iterator');\n  var TAG = wks('toStringTag');\n  var TYPED_CONSTRUCTOR = uid('typed_constructor');\n  var DEF_CONSTRUCTOR = uid('def_constructor');\n  var ALL_CONSTRUCTORS = $typed.CONSTR;\n  var TYPED_ARRAY = $typed.TYPED;\n  var VIEW = $typed.VIEW;\n  var WRONG_LENGTH = 'Wrong length!';\n\n  var $map = createArrayMethod(1, function (O, length) {\n    return allocate(speciesConstructor(O, O[DEF_CONSTRUCTOR]), length);\n  });\n\n  var LITTLE_ENDIAN = fails(function () {\n    // eslint-disable-next-line no-undef\n    return new Uint8Array(new Uint16Array([1]).buffer)[0] === 1;\n  });\n\n  var FORCED_SET = !!Uint8Array && !!Uint8Array[PROTOTYPE].set && fails(function () {\n    new Uint8Array(1).set({});\n  });\n\n  var toOffset = function (it, BYTES) {\n    var offset = toInteger(it);\n    if (offset < 0 || offset % BYTES) throw RangeError('Wrong offset!');\n    return offset;\n  };\n\n  var validate = function (it) {\n    if (isObject(it) && TYPED_ARRAY in it) return it;\n    throw TypeError(it + ' is not a typed array!');\n  };\n\n  var allocate = function (C, length) {\n    if (!(isObject(C) && TYPED_CONSTRUCTOR in C)) {\n      throw TypeError('It is not a typed array constructor!');\n    } return new C(length);\n  };\n\n  var speciesFromList = function (O, list) {\n    return fromList(speciesConstructor(O, O[DEF_CONSTRUCTOR]), list);\n  };\n\n  var fromList = function (C, list) {\n    var index = 0;\n    var length = list.length;\n    var result = allocate(C, length);\n    while (length > index) result[index] = list[index++];\n    return result;\n  };\n\n  var addGetter = function (it, key, internal) {\n    dP(it, key, { get: function () { return this._d[internal]; } });\n  };\n\n  var $from = function from(source /* , mapfn, thisArg */) {\n    var O = toObject(source);\n    var aLen = arguments.length;\n    var mapfn = aLen > 1 ? arguments[1] : undefined;\n    var mapping = mapfn !== undefined;\n    var iterFn = getIterFn(O);\n    var i, length, values, result, step, iterator;\n    if (iterFn != undefined && !isArrayIter(iterFn)) {\n      for (iterator = iterFn.call(O), values = [], i = 0; !(step = iterator.next()).done; i++) {\n        values.push(step.value);\n      } O = values;\n    }\n    if (mapping && aLen > 2) mapfn = ctx(mapfn, arguments[2], 2);\n    for (i = 0, length = toLength(O.length), result = allocate(this, length); length > i; i++) {\n      result[i] = mapping ? mapfn(O[i], i) : O[i];\n    }\n    return result;\n  };\n\n  var $of = function of(/* ...items */) {\n    var index = 0;\n    var length = arguments.length;\n    var result = allocate(this, length);\n    while (length > index) result[index] = arguments[index++];\n    return result;\n  };\n\n  // iOS Safari 6.x fails here\n  var TO_LOCALE_BUG = !!Uint8Array && fails(function () { arrayToLocaleString.call(new Uint8Array(1)); });\n\n  var $toLocaleString = function toLocaleString() {\n    return arrayToLocaleString.apply(TO_LOCALE_BUG ? arraySlice.call(validate(this)) : validate(this), arguments);\n  };\n\n  var proto = {\n    copyWithin: function copyWithin(target, start /* , end */) {\n      return arrayCopyWithin.call(validate(this), target, start, arguments.length > 2 ? arguments[2] : undefined);\n    },\n    every: function every(callbackfn /* , thisArg */) {\n      return arrayEvery(validate(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n    },\n    fill: function fill(value /* , start, end */) { // eslint-disable-line no-unused-vars\n      return arrayFill.apply(validate(this), arguments);\n    },\n    filter: function filter(callbackfn /* , thisArg */) {\n      return speciesFromList(this, arrayFilter(validate(this), callbackfn,\n        arguments.length > 1 ? arguments[1] : undefined));\n    },\n    find: function find(predicate /* , thisArg */) {\n      return arrayFind(validate(this), predicate, arguments.length > 1 ? arguments[1] : undefined);\n    },\n    findIndex: function findIndex(predicate /* , thisArg */) {\n      return arrayFindIndex(validate(this), predicate, arguments.length > 1 ? arguments[1] : undefined);\n    },\n    forEach: function forEach(callbackfn /* , thisArg */) {\n      arrayForEach(validate(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n    },\n    indexOf: function indexOf(searchElement /* , fromIndex */) {\n      return arrayIndexOf(validate(this), searchElement, arguments.length > 1 ? arguments[1] : undefined);\n    },\n    includes: function includes(searchElement /* , fromIndex */) {\n      return arrayIncludes(validate(this), searchElement, arguments.length > 1 ? arguments[1] : undefined);\n    },\n    join: function join(separator) { // eslint-disable-line no-unused-vars\n      return arrayJoin.apply(validate(this), arguments);\n    },\n    lastIndexOf: function lastIndexOf(searchElement /* , fromIndex */) { // eslint-disable-line no-unused-vars\n      return arrayLastIndexOf.apply(validate(this), arguments);\n    },\n    map: function map(mapfn /* , thisArg */) {\n      return $map(validate(this), mapfn, arguments.length > 1 ? arguments[1] : undefined);\n    },\n    reduce: function reduce(callbackfn /* , initialValue */) { // eslint-disable-line no-unused-vars\n      return arrayReduce.apply(validate(this), arguments);\n    },\n    reduceRight: function reduceRight(callbackfn /* , initialValue */) { // eslint-disable-line no-unused-vars\n      return arrayReduceRight.apply(validate(this), arguments);\n    },\n    reverse: function reverse() {\n      var that = this;\n      var length = validate(that).length;\n      var middle = Math.floor(length / 2);\n      var index = 0;\n      var value;\n      while (index < middle) {\n        value = that[index];\n        that[index++] = that[--length];\n        that[length] = value;\n      } return that;\n    },\n    some: function some(callbackfn /* , thisArg */) {\n      return arraySome(validate(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n    },\n    sort: function sort(comparefn) {\n      return arraySort.call(validate(this), comparefn);\n    },\n    subarray: function subarray(begin, end) {\n      var O = validate(this);\n      var length = O.length;\n      var $begin = toAbsoluteIndex(begin, length);\n      return new (speciesConstructor(O, O[DEF_CONSTRUCTOR]))(\n        O.buffer,\n        O.byteOffset + $begin * O.BYTES_PER_ELEMENT,\n        toLength((end === undefined ? length : toAbsoluteIndex(end, length)) - $begin)\n      );\n    }\n  };\n\n  var $slice = function slice(start, end) {\n    return speciesFromList(this, arraySlice.call(validate(this), start, end));\n  };\n\n  var $set = function set(arrayLike /* , offset */) {\n    validate(this);\n    var offset = toOffset(arguments[1], 1);\n    var length = this.length;\n    var src = toObject(arrayLike);\n    var len = toLength(src.length);\n    var index = 0;\n    if (len + offset > length) throw RangeError(WRONG_LENGTH);\n    while (index < len) this[offset + index] = src[index++];\n  };\n\n  var $iterators = {\n    entries: function entries() {\n      return arrayEntries.call(validate(this));\n    },\n    keys: function keys() {\n      return arrayKeys.call(validate(this));\n    },\n    values: function values() {\n      return arrayValues.call(validate(this));\n    }\n  };\n\n  var isTAIndex = function (target, key) {\n    return isObject(target)\n      && target[TYPED_ARRAY]\n      && typeof key != 'symbol'\n      && key in target\n      && String(+key) == String(key);\n  };\n  var $getDesc = function getOwnPropertyDescriptor(target, key) {\n    return isTAIndex(target, key = toPrimitive(key, true))\n      ? propertyDesc(2, target[key])\n      : gOPD(target, key);\n  };\n  var $setDesc = function defineProperty(target, key, desc) {\n    if (isTAIndex(target, key = toPrimitive(key, true))\n      && isObject(desc)\n      && has(desc, 'value')\n      && !has(desc, 'get')\n      && !has(desc, 'set')\n      // TODO: add validation descriptor w/o calling accessors\n      && !desc.configurable\n      && (!has(desc, 'writable') || desc.writable)\n      && (!has(desc, 'enumerable') || desc.enumerable)\n    ) {\n      target[key] = desc.value;\n      return target;\n    } return dP(target, key, desc);\n  };\n\n  if (!ALL_CONSTRUCTORS) {\n    $GOPD.f = $getDesc;\n    $DP.f = $setDesc;\n  }\n\n  $export($export.S + $export.F * !ALL_CONSTRUCTORS, 'Object', {\n    getOwnPropertyDescriptor: $getDesc,\n    defineProperty: $setDesc\n  });\n\n  if (fails(function () { arrayToString.call({}); })) {\n    arrayToString = arrayToLocaleString = function toString() {\n      return arrayJoin.call(this);\n    };\n  }\n\n  var $TypedArrayPrototype$ = redefineAll({}, proto);\n  redefineAll($TypedArrayPrototype$, $iterators);\n  hide($TypedArrayPrototype$, ITERATOR, $iterators.values);\n  redefineAll($TypedArrayPrototype$, {\n    slice: $slice,\n    set: $set,\n    constructor: function () { /* noop */ },\n    toString: arrayToString,\n    toLocaleString: $toLocaleString\n  });\n  addGetter($TypedArrayPrototype$, 'buffer', 'b');\n  addGetter($TypedArrayPrototype$, 'byteOffset', 'o');\n  addGetter($TypedArrayPrototype$, 'byteLength', 'l');\n  addGetter($TypedArrayPrototype$, 'length', 'e');\n  dP($TypedArrayPrototype$, TAG, {\n    get: function () { return this[TYPED_ARRAY]; }\n  });\n\n  // eslint-disable-next-line max-statements\n  module.exports = function (KEY, BYTES, wrapper, CLAMPED) {\n    CLAMPED = !!CLAMPED;\n    var NAME = KEY + (CLAMPED ? 'Clamped' : '') + 'Array';\n    var GETTER = 'get' + KEY;\n    var SETTER = 'set' + KEY;\n    var TypedArray = global[NAME];\n    var Base = TypedArray || {};\n    var TAC = TypedArray && getPrototypeOf(TypedArray);\n    var FORCED = !TypedArray || !$typed.ABV;\n    var O = {};\n    var TypedArrayPrototype = TypedArray && TypedArray[PROTOTYPE];\n    var getter = function (that, index) {\n      var data = that._d;\n      return data.v[GETTER](index * BYTES + data.o, LITTLE_ENDIAN);\n    };\n    var setter = function (that, index, value) {\n      var data = that._d;\n      if (CLAMPED) value = (value = Math.round(value)) < 0 ? 0 : value > 0xff ? 0xff : value & 0xff;\n      data.v[SETTER](index * BYTES + data.o, value, LITTLE_ENDIAN);\n    };\n    var addElement = function (that, index) {\n      dP(that, index, {\n        get: function () {\n          return getter(this, index);\n        },\n        set: function (value) {\n          return setter(this, index, value);\n        },\n        enumerable: true\n      });\n    };\n    if (FORCED) {\n      TypedArray = wrapper(function (that, data, $offset, $length) {\n        anInstance(that, TypedArray, NAME, '_d');\n        var index = 0;\n        var offset = 0;\n        var buffer, byteLength, length, klass;\n        if (!isObject(data)) {\n          length = toIndex(data);\n          byteLength = length * BYTES;\n          buffer = new $ArrayBuffer(byteLength);\n        } else if (data instanceof $ArrayBuffer || (klass = classof(data)) == ARRAY_BUFFER || klass == SHARED_BUFFER) {\n          buffer = data;\n          offset = toOffset($offset, BYTES);\n          var $len = data.byteLength;\n          if ($length === undefined) {\n            if ($len % BYTES) throw RangeError(WRONG_LENGTH);\n            byteLength = $len - offset;\n            if (byteLength < 0) throw RangeError(WRONG_LENGTH);\n          } else {\n            byteLength = toLength($length) * BYTES;\n            if (byteLength + offset > $len) throw RangeError(WRONG_LENGTH);\n          }\n          length = byteLength / BYTES;\n        } else if (TYPED_ARRAY in data) {\n          return fromList(TypedArray, data);\n        } else {\n          return $from.call(TypedArray, data);\n        }\n        hide(that, '_d', {\n          b: buffer,\n          o: offset,\n          l: byteLength,\n          e: length,\n          v: new $DataView(buffer)\n        });\n        while (index < length) addElement(that, index++);\n      });\n      TypedArrayPrototype = TypedArray[PROTOTYPE] = create($TypedArrayPrototype$);\n      hide(TypedArrayPrototype, 'constructor', TypedArray);\n    } else if (!fails(function () {\n      TypedArray(1);\n    }) || !fails(function () {\n      new TypedArray(-1); // eslint-disable-line no-new\n    }) || !$iterDetect(function (iter) {\n      new TypedArray(); // eslint-disable-line no-new\n      new TypedArray(null); // eslint-disable-line no-new\n      new TypedArray(1.5); // eslint-disable-line no-new\n      new TypedArray(iter); // eslint-disable-line no-new\n    }, true)) {\n      TypedArray = wrapper(function (that, data, $offset, $length) {\n        anInstance(that, TypedArray, NAME);\n        var klass;\n        // `ws` module bug, temporarily remove validation length for Uint8Array\n        // https://github.com/websockets/ws/pull/645\n        if (!isObject(data)) return new Base(toIndex(data));\n        if (data instanceof $ArrayBuffer || (klass = classof(data)) == ARRAY_BUFFER || klass == SHARED_BUFFER) {\n          return $length !== undefined\n            ? new Base(data, toOffset($offset, BYTES), $length)\n            : $offset !== undefined\n              ? new Base(data, toOffset($offset, BYTES))\n              : new Base(data);\n        }\n        if (TYPED_ARRAY in data) return fromList(TypedArray, data);\n        return $from.call(TypedArray, data);\n      });\n      arrayForEach(TAC !== Function.prototype ? gOPN(Base).concat(gOPN(TAC)) : gOPN(Base), function (key) {\n        if (!(key in TypedArray)) hide(TypedArray, key, Base[key]);\n      });\n      TypedArray[PROTOTYPE] = TypedArrayPrototype;\n      if (!LIBRARY) TypedArrayPrototype.constructor = TypedArray;\n    }\n    var $nativeIterator = TypedArrayPrototype[ITERATOR];\n    var CORRECT_ITER_NAME = !!$nativeIterator\n      && ($nativeIterator.name == 'values' || $nativeIterator.name == undefined);\n    var $iterator = $iterators.values;\n    hide(TypedArray, TYPED_CONSTRUCTOR, true);\n    hide(TypedArrayPrototype, TYPED_ARRAY, NAME);\n    hide(TypedArrayPrototype, VIEW, true);\n    hide(TypedArrayPrototype, DEF_CONSTRUCTOR, TypedArray);\n\n    if (CLAMPED ? new TypedArray(1)[TAG] != NAME : !(TAG in TypedArrayPrototype)) {\n      dP(TypedArrayPrototype, TAG, {\n        get: function () { return NAME; }\n      });\n    }\n\n    O[NAME] = TypedArray;\n\n    $export($export.G + $export.W + $export.F * (TypedArray != Base), O);\n\n    $export($export.S, NAME, {\n      BYTES_PER_ELEMENT: BYTES\n    });\n\n    $export($export.S + $export.F * fails(function () { Base.of.call(TypedArray, 1); }), NAME, {\n      from: $from,\n      of: $of\n    });\n\n    if (!(BYTES_PER_ELEMENT in TypedArrayPrototype)) hide(TypedArrayPrototype, BYTES_PER_ELEMENT, BYTES);\n\n    $export($export.P, NAME, proto);\n\n    setSpecies(NAME);\n\n    $export($export.P + $export.F * FORCED_SET, NAME, { set: $set });\n\n    $export($export.P + $export.F * !CORRECT_ITER_NAME, NAME, $iterators);\n\n    if (!LIBRARY && TypedArrayPrototype.toString != arrayToString) TypedArrayPrototype.toString = arrayToString;\n\n    $export($export.P + $export.F * fails(function () {\n      new TypedArray(1).slice();\n    }), NAME, { slice: $slice });\n\n    $export($export.P + $export.F * (fails(function () {\n      return [1, 2].toLocaleString() != new TypedArray([1, 2]).toLocaleString();\n    }) || !fails(function () {\n      TypedArrayPrototype.toLocaleString.call([1, 2]);\n    })), NAME, { toLocaleString: $toLocaleString });\n\n    Iterators[NAME] = CORRECT_ITER_NAME ? $nativeIterator : $iterator;\n    if (!LIBRARY && !CORRECT_ITER_NAME) hide(TypedArrayPrototype, ITERATOR, $iterator);\n  };\n} else module.exports = function () { /* empty */ };\n});\n\n_typedArray('Int8', 1, function (init) {\n  return function Int8Array(data, byteOffset, length) {\n    return init(this, data, byteOffset, length);\n  };\n});\n\n_typedArray('Uint8', 1, function (init) {\n  return function Uint8Array(data, byteOffset, length) {\n    return init(this, data, byteOffset, length);\n  };\n});\n\n_typedArray('Uint8', 1, function (init) {\n  return function Uint8ClampedArray(data, byteOffset, length) {\n    return init(this, data, byteOffset, length);\n  };\n}, true);\n\n_typedArray('Int16', 2, function (init) {\n  return function Int16Array(data, byteOffset, length) {\n    return init(this, data, byteOffset, length);\n  };\n});\n\n_typedArray('Uint16', 2, function (init) {\n  return function Uint16Array(data, byteOffset, length) {\n    return init(this, data, byteOffset, length);\n  };\n});\n\n_typedArray('Int32', 4, function (init) {\n  return function Int32Array(data, byteOffset, length) {\n    return init(this, data, byteOffset, length);\n  };\n});\n\n_typedArray('Uint32', 4, function (init) {\n  return function Uint32Array(data, byteOffset, length) {\n    return init(this, data, byteOffset, length);\n  };\n});\n\n_typedArray('Float32', 4, function (init) {\n  return function Float32Array(data, byteOffset, length) {\n    return init(this, data, byteOffset, length);\n  };\n});\n\n_typedArray('Float64', 8, function (init) {\n  return function Float64Array(data, byteOffset, length) {\n    return init(this, data, byteOffset, length);\n  };\n});\n\n// 26.1.1 Reflect.apply(target, thisArgument, argumentsList)\n\n\n\nvar rApply = (_global.Reflect || {}).apply;\nvar fApply = Function.apply;\n// MS Edge argumentsList argument is optional\n_export(_export.S + _export.F * !_fails(function () {\n  rApply(function () { /* empty */ });\n}), 'Reflect', {\n  apply: function apply(target, thisArgument, argumentsList) {\n    var T = _aFunction(target);\n    var L = _anObject(argumentsList);\n    return rApply ? rApply(T, thisArgument, L) : fApply.call(T, thisArgument, L);\n  }\n});\n\n// 26.1.2 Reflect.construct(target, argumentsList [, newTarget])\n\n\n\n\n\n\n\nvar rConstruct = (_global.Reflect || {}).construct;\n\n// MS Edge supports only 2 arguments and argumentsList argument is optional\n// FF Nightly sets third argument as `new.target`, but does not create `this` from it\nvar NEW_TARGET_BUG = _fails(function () {\n  function F() { /* empty */ }\n  return !(rConstruct(function () { /* empty */ }, [], F) instanceof F);\n});\nvar ARGS_BUG = !_fails(function () {\n  rConstruct(function () { /* empty */ });\n});\n\n_export(_export.S + _export.F * (NEW_TARGET_BUG || ARGS_BUG), 'Reflect', {\n  construct: function construct(Target, args /* , newTarget */) {\n    _aFunction(Target);\n    _anObject(args);\n    var newTarget = arguments.length < 3 ? Target : _aFunction(arguments[2]);\n    if (ARGS_BUG && !NEW_TARGET_BUG) return rConstruct(Target, args, newTarget);\n    if (Target == newTarget) {\n      // w/o altered newTarget, optimization for 0-4 arguments\n      switch (args.length) {\n        case 0: return new Target();\n        case 1: return new Target(args[0]);\n        case 2: return new Target(args[0], args[1]);\n        case 3: return new Target(args[0], args[1], args[2]);\n        case 4: return new Target(args[0], args[1], args[2], args[3]);\n      }\n      // w/o altered newTarget, lot of arguments case\n      var $args = [null];\n      $args.push.apply($args, args);\n      return new (_bind.apply(Target, $args))();\n    }\n    // with altered newTarget, not support built-in constructors\n    var proto = newTarget.prototype;\n    var instance = _objectCreate(_isObject(proto) ? proto : Object.prototype);\n    var result = Function.apply.call(Target, instance, args);\n    return _isObject(result) ? result : instance;\n  }\n});\n\n// 26.1.3 Reflect.defineProperty(target, propertyKey, attributes)\n\n\n\n\n\n// MS Edge has broken Reflect.defineProperty - throwing instead of returning false\n_export(_export.S + _export.F * _fails(function () {\n  // eslint-disable-next-line no-undef\n  Reflect.defineProperty(_objectDp.f({}, 1, { value: 1 }), 1, { value: 2 });\n}), 'Reflect', {\n  defineProperty: function defineProperty(target, propertyKey, attributes) {\n    _anObject(target);\n    propertyKey = _toPrimitive(propertyKey, true);\n    _anObject(attributes);\n    try {\n      _objectDp.f(target, propertyKey, attributes);\n      return true;\n    } catch (e) {\n      return false;\n    }\n  }\n});\n\n// 26.1.4 Reflect.deleteProperty(target, propertyKey)\n\nvar gOPD$3 = _objectGopd.f;\n\n\n_export(_export.S, 'Reflect', {\n  deleteProperty: function deleteProperty(target, propertyKey) {\n    var desc = gOPD$3(_anObject(target), propertyKey);\n    return desc && !desc.configurable ? false : delete target[propertyKey];\n  }\n});\n\n// 26.1.5 Reflect.enumerate(target)\n\n\nvar Enumerate = function (iterated) {\n  this._t = _anObject(iterated); // target\n  this._i = 0;                  // next index\n  var keys = this._k = [];      // keys\n  var key;\n  for (key in iterated) keys.push(key);\n};\n_iterCreate(Enumerate, 'Object', function () {\n  var that = this;\n  var keys = that._k;\n  var key;\n  do {\n    if (that._i >= keys.length) return { value: undefined, done: true };\n  } while (!((key = keys[that._i++]) in that._t));\n  return { value: key, done: false };\n});\n\n_export(_export.S, 'Reflect', {\n  enumerate: function enumerate(target) {\n    return new Enumerate(target);\n  }\n});\n\n// 26.1.6 Reflect.get(target, propertyKey [, receiver])\n\n\n\n\n\n\n\nfunction get(target, propertyKey /* , receiver */) {\n  var receiver = arguments.length < 3 ? target : arguments[2];\n  var desc, proto;\n  if (_anObject(target) === receiver) return target[propertyKey];\n  if (desc = _objectGopd.f(target, propertyKey)) return _has(desc, 'value')\n    ? desc.value\n    : desc.get !== undefined\n      ? desc.get.call(receiver)\n      : undefined;\n  if (_isObject(proto = _objectGpo(target))) return get(proto, propertyKey, receiver);\n}\n\n_export(_export.S, 'Reflect', { get: get });\n\n// 26.1.7 Reflect.getOwnPropertyDescriptor(target, propertyKey)\n\n\n\n\n_export(_export.S, 'Reflect', {\n  getOwnPropertyDescriptor: function getOwnPropertyDescriptor(target, propertyKey) {\n    return _objectGopd.f(_anObject(target), propertyKey);\n  }\n});\n\n// 26.1.8 Reflect.getPrototypeOf(target)\n\n\n\n\n_export(_export.S, 'Reflect', {\n  getPrototypeOf: function getPrototypeOf(target) {\n    return _objectGpo(_anObject(target));\n  }\n});\n\n// 26.1.9 Reflect.has(target, propertyKey)\n\n\n_export(_export.S, 'Reflect', {\n  has: function has(target, propertyKey) {\n    return propertyKey in target;\n  }\n});\n\n// 26.1.10 Reflect.isExtensible(target)\n\n\nvar $isExtensible = Object.isExtensible;\n\n_export(_export.S, 'Reflect', {\n  isExtensible: function isExtensible(target) {\n    _anObject(target);\n    return $isExtensible ? $isExtensible(target) : true;\n  }\n});\n\n// all object keys, includes non-enumerable and symbols\n\n\n\nvar Reflect$1 = _global.Reflect;\nvar _ownKeys = Reflect$1 && Reflect$1.ownKeys || function ownKeys(it) {\n  var keys = _objectGopn.f(_anObject(it));\n  var getSymbols = _objectGops.f;\n  return getSymbols ? keys.concat(getSymbols(it)) : keys;\n};\n\n// 26.1.11 Reflect.ownKeys(target)\n\n\n_export(_export.S, 'Reflect', { ownKeys: _ownKeys });\n\n// 26.1.12 Reflect.preventExtensions(target)\n\n\nvar $preventExtensions = Object.preventExtensions;\n\n_export(_export.S, 'Reflect', {\n  preventExtensions: function preventExtensions(target) {\n    _anObject(target);\n    try {\n      if ($preventExtensions) $preventExtensions(target);\n      return true;\n    } catch (e) {\n      return false;\n    }\n  }\n});\n\n// 26.1.13 Reflect.set(target, propertyKey, V [, receiver])\n\n\n\n\n\n\n\n\n\nfunction set(target, propertyKey, V /* , receiver */) {\n  var receiver = arguments.length < 4 ? target : arguments[3];\n  var ownDesc = _objectGopd.f(_anObject(target), propertyKey);\n  var existingDescriptor, proto;\n  if (!ownDesc) {\n    if (_isObject(proto = _objectGpo(target))) {\n      return set(proto, propertyKey, V, receiver);\n    }\n    ownDesc = _propertyDesc(0);\n  }\n  if (_has(ownDesc, 'value')) {\n    if (ownDesc.writable === false || !_isObject(receiver)) return false;\n    if (existingDescriptor = _objectGopd.f(receiver, propertyKey)) {\n      if (existingDescriptor.get || existingDescriptor.set || existingDescriptor.writable === false) return false;\n      existingDescriptor.value = V;\n      _objectDp.f(receiver, propertyKey, existingDescriptor);\n    } else _objectDp.f(receiver, propertyKey, _propertyDesc(0, V));\n    return true;\n  }\n  return ownDesc.set === undefined ? false : (ownDesc.set.call(receiver, V), true);\n}\n\n_export(_export.S, 'Reflect', { set: set });\n\n// 26.1.14 Reflect.setPrototypeOf(target, proto)\n\n\n\nif (_setProto) _export(_export.S, 'Reflect', {\n  setPrototypeOf: function setPrototypeOf(target, proto) {\n    _setProto.check(target, proto);\n    try {\n      _setProto.set(target, proto);\n      return true;\n    } catch (e) {\n      return false;\n    }\n  }\n});\n\n// https://github.com/tc39/Array.prototype.includes\n\nvar $includes = _arrayIncludes(true);\n\n_export(_export.P, 'Array', {\n  includes: function includes(el /* , fromIndex = 0 */) {\n    return $includes(this, el, arguments.length > 1 ? arguments[1] : undefined);\n  }\n});\n\n_addToUnscopables('includes');\n\n// https://tc39.github.io/proposal-flatMap/#sec-FlattenIntoArray\n\n\n\n\nvar IS_CONCAT_SPREADABLE = _wks('isConcatSpreadable');\n\nfunction flattenIntoArray(target, original, source, sourceLen, start, depth, mapper, thisArg) {\n  var targetIndex = start;\n  var sourceIndex = 0;\n  var mapFn = mapper ? _ctx(mapper, thisArg, 3) : false;\n  var element, spreadable;\n\n  while (sourceIndex < sourceLen) {\n    if (sourceIndex in source) {\n      element = mapFn ? mapFn(source[sourceIndex], sourceIndex, original) : source[sourceIndex];\n\n      spreadable = false;\n      if (_isObject(element)) {\n        spreadable = element[IS_CONCAT_SPREADABLE];\n        spreadable = spreadable !== undefined ? !!spreadable : _isArray(element);\n      }\n\n      if (spreadable && depth > 0) {\n        targetIndex = flattenIntoArray(target, original, element, _toLength(element.length), targetIndex, depth - 1) - 1;\n      } else {\n        if (targetIndex >= 0x1fffffffffffff) throw TypeError();\n        target[targetIndex] = element;\n      }\n\n      targetIndex++;\n    }\n    sourceIndex++;\n  }\n  return targetIndex;\n}\n\nvar _flattenIntoArray = flattenIntoArray;\n\n// https://tc39.github.io/proposal-flatMap/#sec-Array.prototype.flatMap\n\n\n\n\n\n\n\n_export(_export.P, 'Array', {\n  flatMap: function flatMap(callbackfn /* , thisArg */) {\n    var O = _toObject(this);\n    var sourceLen, A;\n    _aFunction(callbackfn);\n    sourceLen = _toLength(O.length);\n    A = _arraySpeciesCreate(O, 0);\n    _flattenIntoArray(A, O, O, sourceLen, 0, 1, callbackfn, arguments[1]);\n    return A;\n  }\n});\n\n_addToUnscopables('flatMap');\n\n// https://tc39.github.io/proposal-flatMap/#sec-Array.prototype.flatten\n\n\n\n\n\n\n\n_export(_export.P, 'Array', {\n  flatten: function flatten(/* depthArg = 1 */) {\n    var depthArg = arguments[0];\n    var O = _toObject(this);\n    var sourceLen = _toLength(O.length);\n    var A = _arraySpeciesCreate(O, 0);\n    _flattenIntoArray(A, O, O, sourceLen, 0, depthArg === undefined ? 1 : _toInteger(depthArg));\n    return A;\n  }\n});\n\n_addToUnscopables('flatten');\n\n// https://github.com/mathiasbynens/String.prototype.at\n\nvar $at$2 = _stringAt(true);\n\n\nvar FORCED = _fails(function () {\n  return '𠮷'.at(0) !== '𠮷';\n});\n\n_export(_export.P + _export.F * FORCED, 'String', {\n  at: function at(pos) {\n    return $at$2(this, pos);\n  }\n});\n\n// https://github.com/tc39/proposal-string-pad-start-end\n\n\n\n\nvar _stringPad = function (that, maxLength, fillString, left) {\n  var S = String(_defined(that));\n  var stringLength = S.length;\n  var fillStr = fillString === undefined ? ' ' : String(fillString);\n  var intMaxLength = _toLength(maxLength);\n  if (intMaxLength <= stringLength || fillStr == '') return S;\n  var fillLen = intMaxLength - stringLength;\n  var stringFiller = _stringRepeat.call(fillStr, Math.ceil(fillLen / fillStr.length));\n  if (stringFiller.length > fillLen) stringFiller = stringFiller.slice(0, fillLen);\n  return left ? stringFiller + S : S + stringFiller;\n};\n\n// https://github.com/tc39/proposal-string-pad-start-end\n\n\n\n\n// https://github.com/zloirock/core-js/issues/280\nvar WEBKIT_BUG = /Version\\/10\\.\\d+(\\.\\d+)?( Mobile\\/\\w+)? Safari\\//.test(_userAgent);\n\n_export(_export.P + _export.F * WEBKIT_BUG, 'String', {\n  padStart: function padStart(maxLength /* , fillString = ' ' */) {\n    return _stringPad(this, maxLength, arguments.length > 1 ? arguments[1] : undefined, true);\n  }\n});\n\n// https://github.com/tc39/proposal-string-pad-start-end\n\n\n\n\n// https://github.com/zloirock/core-js/issues/280\nvar WEBKIT_BUG$1 = /Version\\/10\\.\\d+(\\.\\d+)?( Mobile\\/\\w+)? Safari\\//.test(_userAgent);\n\n_export(_export.P + _export.F * WEBKIT_BUG$1, 'String', {\n  padEnd: function padEnd(maxLength /* , fillString = ' ' */) {\n    return _stringPad(this, maxLength, arguments.length > 1 ? arguments[1] : undefined, false);\n  }\n});\n\n// https://github.com/sebmarkbage/ecmascript-string-left-right-trim\n_stringTrim('trimLeft', function ($trim) {\n  return function trimLeft() {\n    return $trim(this, 1);\n  };\n}, 'trimStart');\n\n// https://github.com/sebmarkbage/ecmascript-string-left-right-trim\n_stringTrim('trimRight', function ($trim) {\n  return function trimRight() {\n    return $trim(this, 2);\n  };\n}, 'trimEnd');\n\n// https://tc39.github.io/String.prototype.matchAll/\n\n\n\n\n\nvar RegExpProto = RegExp.prototype;\n\nvar $RegExpStringIterator = function (regexp, string) {\n  this._r = regexp;\n  this._s = string;\n};\n\n_iterCreate($RegExpStringIterator, 'RegExp String', function next() {\n  var match = this._r.exec(this._s);\n  return { value: match, done: match === null };\n});\n\n_export(_export.P, 'String', {\n  matchAll: function matchAll(regexp) {\n    _defined(this);\n    if (!_isRegexp(regexp)) throw TypeError(regexp + ' is not a regexp!');\n    var S = String(this);\n    var flags = 'flags' in RegExpProto ? String(regexp.flags) : _flags.call(regexp);\n    var rx = new RegExp(regexp.source, ~flags.indexOf('g') ? flags : 'g' + flags);\n    rx.lastIndex = _toLength(regexp.lastIndex);\n    return new $RegExpStringIterator(rx, S);\n  }\n});\n\n_wksDefine('asyncIterator');\n\n_wksDefine('observable');\n\n// https://github.com/tc39/proposal-object-getownpropertydescriptors\n\n\n\n\n\n\n_export(_export.S, 'Object', {\n  getOwnPropertyDescriptors: function getOwnPropertyDescriptors(object) {\n    var O = _toIobject(object);\n    var getDesc = _objectGopd.f;\n    var keys = _ownKeys(O);\n    var result = {};\n    var i = 0;\n    var key, desc;\n    while (keys.length > i) {\n      desc = getDesc(O, key = keys[i++]);\n      if (desc !== undefined) _createProperty(result, key, desc);\n    }\n    return result;\n  }\n});\n\nvar isEnum$1 = _objectPie.f;\nvar _objectToArray = function (isEntries) {\n  return function (it) {\n    var O = _toIobject(it);\n    var keys = _objectKeys(O);\n    var length = keys.length;\n    var i = 0;\n    var result = [];\n    var key;\n    while (length > i) {\n      key = keys[i++];\n      if (!_descriptors || isEnum$1.call(O, key)) {\n        result.push(isEntries ? [key, O[key]] : O[key]);\n      }\n    }\n    return result;\n  };\n};\n\n// https://github.com/tc39/proposal-object-values-entries\n\nvar $values = _objectToArray(false);\n\n_export(_export.S, 'Object', {\n  values: function values(it) {\n    return $values(it);\n  }\n});\n\n// https://github.com/tc39/proposal-object-values-entries\n\nvar $entries = _objectToArray(true);\n\n_export(_export.S, 'Object', {\n  entries: function entries(it) {\n    return $entries(it);\n  }\n});\n\n// Forced replacement prototype accessors methods\nvar _objectForcedPam =  !_fails(function () {\n  var K = Math.random();\n  // In FF throws only define methods\n  // eslint-disable-next-line no-undef, no-useless-call\n  __defineSetter__.call(null, K, function () { /* empty */ });\n  delete _global[K];\n});\n\n// B.2.2.2 Object.prototype.__defineGetter__(P, getter)\n_descriptors && _export(_export.P + _objectForcedPam, 'Object', {\n  __defineGetter__: function __defineGetter__(P, getter) {\n    _objectDp.f(_toObject(this), P, { get: _aFunction(getter), enumerable: true, configurable: true });\n  }\n});\n\n// B.2.2.3 Object.prototype.__defineSetter__(P, setter)\n_descriptors && _export(_export.P + _objectForcedPam, 'Object', {\n  __defineSetter__: function __defineSetter__(P, setter) {\n    _objectDp.f(_toObject(this), P, { set: _aFunction(setter), enumerable: true, configurable: true });\n  }\n});\n\nvar getOwnPropertyDescriptor = _objectGopd.f;\n\n// B.2.2.4 Object.prototype.__lookupGetter__(P)\n_descriptors && _export(_export.P + _objectForcedPam, 'Object', {\n  __lookupGetter__: function __lookupGetter__(P) {\n    var O = _toObject(this);\n    var K = _toPrimitive(P, true);\n    var D;\n    do {\n      if (D = getOwnPropertyDescriptor(O, K)) return D.get;\n    } while (O = _objectGpo(O));\n  }\n});\n\nvar getOwnPropertyDescriptor$1 = _objectGopd.f;\n\n// B.2.2.5 Object.prototype.__lookupSetter__(P)\n_descriptors && _export(_export.P + _objectForcedPam, 'Object', {\n  __lookupSetter__: function __lookupSetter__(P) {\n    var O = _toObject(this);\n    var K = _toPrimitive(P, true);\n    var D;\n    do {\n      if (D = getOwnPropertyDescriptor$1(O, K)) return D.set;\n    } while (O = _objectGpo(O));\n  }\n});\n\nvar _arrayFromIterable = function (iter, ITERATOR) {\n  var result = [];\n  _forOf(iter, false, result.push, result, ITERATOR);\n  return result;\n};\n\n// https://github.com/DavidBruant/Map-Set.prototype.toJSON\n\n\nvar _collectionToJson = function (NAME) {\n  return function toJSON() {\n    if (_classof(this) != NAME) throw TypeError(NAME + \"#toJSON isn't generic\");\n    return _arrayFromIterable(this);\n  };\n};\n\n// https://github.com/DavidBruant/Map-Set.prototype.toJSON\n\n\n_export(_export.P + _export.R, 'Map', { toJSON: _collectionToJson('Map') });\n\n// https://github.com/DavidBruant/Map-Set.prototype.toJSON\n\n\n_export(_export.P + _export.R, 'Set', { toJSON: _collectionToJson('Set') });\n\n// https://tc39.github.io/proposal-setmap-offrom/\n\n\nvar _setCollectionOf = function (COLLECTION) {\n  _export(_export.S, COLLECTION, { of: function of() {\n    var length = arguments.length;\n    var A = new Array(length);\n    while (length--) A[length] = arguments[length];\n    return new this(A);\n  } });\n};\n\n// https://tc39.github.io/proposal-setmap-offrom/#sec-map.of\n_setCollectionOf('Map');\n\n// https://tc39.github.io/proposal-setmap-offrom/#sec-set.of\n_setCollectionOf('Set');\n\n// https://tc39.github.io/proposal-setmap-offrom/#sec-weakmap.of\n_setCollectionOf('WeakMap');\n\n// https://tc39.github.io/proposal-setmap-offrom/#sec-weakset.of\n_setCollectionOf('WeakSet');\n\n// https://tc39.github.io/proposal-setmap-offrom/\n\n\n\n\n\nvar _setCollectionFrom = function (COLLECTION) {\n  _export(_export.S, COLLECTION, { from: function from(source /* , mapFn, thisArg */) {\n    var mapFn = arguments[1];\n    var mapping, A, n, cb;\n    _aFunction(this);\n    mapping = mapFn !== undefined;\n    if (mapping) _aFunction(mapFn);\n    if (source == undefined) return new this();\n    A = [];\n    if (mapping) {\n      n = 0;\n      cb = _ctx(mapFn, arguments[2], 2);\n      _forOf(source, false, function (nextItem) {\n        A.push(cb(nextItem, n++));\n      });\n    } else {\n      _forOf(source, false, A.push, A);\n    }\n    return new this(A);\n  } });\n};\n\n// https://tc39.github.io/proposal-setmap-offrom/#sec-map.from\n_setCollectionFrom('Map');\n\n// https://tc39.github.io/proposal-setmap-offrom/#sec-set.from\n_setCollectionFrom('Set');\n\n// https://tc39.github.io/proposal-setmap-offrom/#sec-weakmap.from\n_setCollectionFrom('WeakMap');\n\n// https://tc39.github.io/proposal-setmap-offrom/#sec-weakset.from\n_setCollectionFrom('WeakSet');\n\n// https://github.com/tc39/proposal-global\n\n\n_export(_export.G, { global: _global });\n\n// https://github.com/tc39/proposal-global\n\n\n_export(_export.S, 'System', { global: _global });\n\n// https://github.com/ljharb/proposal-is-error\n\n\n\n_export(_export.S, 'Error', {\n  isError: function isError(it) {\n    return _cof(it) === 'Error';\n  }\n});\n\n// https://rwaldron.github.io/proposal-math-extensions/\n\n\n_export(_export.S, 'Math', {\n  clamp: function clamp(x, lower, upper) {\n    return Math.min(upper, Math.max(lower, x));\n  }\n});\n\n// https://rwaldron.github.io/proposal-math-extensions/\n\n\n_export(_export.S, 'Math', { DEG_PER_RAD: Math.PI / 180 });\n\n// https://rwaldron.github.io/proposal-math-extensions/\n\nvar RAD_PER_DEG = 180 / Math.PI;\n\n_export(_export.S, 'Math', {\n  degrees: function degrees(radians) {\n    return radians * RAD_PER_DEG;\n  }\n});\n\n// https://rwaldron.github.io/proposal-math-extensions/\nvar _mathScale = Math.scale || function scale(x, inLow, inHigh, outLow, outHigh) {\n  if (\n    arguments.length === 0\n      // eslint-disable-next-line no-self-compare\n      || x != x\n      // eslint-disable-next-line no-self-compare\n      || inLow != inLow\n      // eslint-disable-next-line no-self-compare\n      || inHigh != inHigh\n      // eslint-disable-next-line no-self-compare\n      || outLow != outLow\n      // eslint-disable-next-line no-self-compare\n      || outHigh != outHigh\n  ) return NaN;\n  if (x === Infinity || x === -Infinity) return x;\n  return (x - inLow) * (outHigh - outLow) / (inHigh - inLow) + outLow;\n};\n\n// https://rwaldron.github.io/proposal-math-extensions/\n\n\n\n\n_export(_export.S, 'Math', {\n  fscale: function fscale(x, inLow, inHigh, outLow, outHigh) {\n    return _mathFround(_mathScale(x, inLow, inHigh, outLow, outHigh));\n  }\n});\n\n// https://gist.github.com/BrendanEich/4294d5c212a6d2254703\n\n\n_export(_export.S, 'Math', {\n  iaddh: function iaddh(x0, x1, y0, y1) {\n    var $x0 = x0 >>> 0;\n    var $x1 = x1 >>> 0;\n    var $y0 = y0 >>> 0;\n    return $x1 + (y1 >>> 0) + (($x0 & $y0 | ($x0 | $y0) & ~($x0 + $y0 >>> 0)) >>> 31) | 0;\n  }\n});\n\n// https://gist.github.com/BrendanEich/4294d5c212a6d2254703\n\n\n_export(_export.S, 'Math', {\n  isubh: function isubh(x0, x1, y0, y1) {\n    var $x0 = x0 >>> 0;\n    var $x1 = x1 >>> 0;\n    var $y0 = y0 >>> 0;\n    return $x1 - (y1 >>> 0) - ((~$x0 & $y0 | ~($x0 ^ $y0) & $x0 - $y0 >>> 0) >>> 31) | 0;\n  }\n});\n\n// https://gist.github.com/BrendanEich/4294d5c212a6d2254703\n\n\n_export(_export.S, 'Math', {\n  imulh: function imulh(u, v) {\n    var UINT16 = 0xffff;\n    var $u = +u;\n    var $v = +v;\n    var u0 = $u & UINT16;\n    var v0 = $v & UINT16;\n    var u1 = $u >> 16;\n    var v1 = $v >> 16;\n    var t = (u1 * v0 >>> 0) + (u0 * v0 >>> 16);\n    return u1 * v1 + (t >> 16) + ((u0 * v1 >>> 0) + (t & UINT16) >> 16);\n  }\n});\n\n// https://rwaldron.github.io/proposal-math-extensions/\n\n\n_export(_export.S, 'Math', { RAD_PER_DEG: 180 / Math.PI });\n\n// https://rwaldron.github.io/proposal-math-extensions/\n\nvar DEG_PER_RAD = Math.PI / 180;\n\n_export(_export.S, 'Math', {\n  radians: function radians(degrees) {\n    return degrees * DEG_PER_RAD;\n  }\n});\n\n// https://rwaldron.github.io/proposal-math-extensions/\n\n\n_export(_export.S, 'Math', { scale: _mathScale });\n\n// https://gist.github.com/BrendanEich/4294d5c212a6d2254703\n\n\n_export(_export.S, 'Math', {\n  umulh: function umulh(u, v) {\n    var UINT16 = 0xffff;\n    var $u = +u;\n    var $v = +v;\n    var u0 = $u & UINT16;\n    var v0 = $v & UINT16;\n    var u1 = $u >>> 16;\n    var v1 = $v >>> 16;\n    var t = (u1 * v0 >>> 0) + (u0 * v0 >>> 16);\n    return u1 * v1 + (t >>> 16) + ((u0 * v1 >>> 0) + (t & UINT16) >>> 16);\n  }\n});\n\n// http://jfbastien.github.io/papers/Math.signbit.html\n\n\n_export(_export.S, 'Math', { signbit: function signbit(x) {\n  // eslint-disable-next-line no-self-compare\n  return (x = +x) != x ? x : x == 0 ? 1 / x == Infinity : x > 0;\n} });\n\n_export(_export.P + _export.R, 'Promise', { 'finally': function (onFinally) {\n  var C = _speciesConstructor(this, _core.Promise || _global.Promise);\n  var isFunction = typeof onFinally == 'function';\n  return this.then(\n    isFunction ? function (x) {\n      return _promiseResolve(C, onFinally()).then(function () { return x; });\n    } : onFinally,\n    isFunction ? function (e) {\n      return _promiseResolve(C, onFinally()).then(function () { throw e; });\n    } : onFinally\n  );\n} });\n\n// https://github.com/tc39/proposal-promise-try\n\n\n\n\n_export(_export.S, 'Promise', { 'try': function (callbackfn) {\n  var promiseCapability = _newPromiseCapability.f(this);\n  var result = _perform(callbackfn);\n  (result.e ? promiseCapability.reject : promiseCapability.resolve)(result.v);\n  return promiseCapability.promise;\n} });\n\nvar shared$1 = _shared('metadata');\nvar store = shared$1.store || (shared$1.store = new (es6_weakMap)());\n\nvar getOrCreateMetadataMap = function (target, targetKey, create) {\n  var targetMetadata = store.get(target);\n  if (!targetMetadata) {\n    if (!create) return undefined;\n    store.set(target, targetMetadata = new es6_map());\n  }\n  var keyMetadata = targetMetadata.get(targetKey);\n  if (!keyMetadata) {\n    if (!create) return undefined;\n    targetMetadata.set(targetKey, keyMetadata = new es6_map());\n  } return keyMetadata;\n};\nvar ordinaryHasOwnMetadata = function (MetadataKey, O, P) {\n  var metadataMap = getOrCreateMetadataMap(O, P, false);\n  return metadataMap === undefined ? false : metadataMap.has(MetadataKey);\n};\nvar ordinaryGetOwnMetadata = function (MetadataKey, O, P) {\n  var metadataMap = getOrCreateMetadataMap(O, P, false);\n  return metadataMap === undefined ? undefined : metadataMap.get(MetadataKey);\n};\nvar ordinaryDefineOwnMetadata = function (MetadataKey, MetadataValue, O, P) {\n  getOrCreateMetadataMap(O, P, true).set(MetadataKey, MetadataValue);\n};\nvar ordinaryOwnMetadataKeys = function (target, targetKey) {\n  var metadataMap = getOrCreateMetadataMap(target, targetKey, false);\n  var keys = [];\n  if (metadataMap) metadataMap.forEach(function (_, key) { keys.push(key); });\n  return keys;\n};\nvar toMetaKey = function (it) {\n  return it === undefined || typeof it == 'symbol' ? it : String(it);\n};\nvar exp$3 = function (O) {\n  _export(_export.S, 'Reflect', O);\n};\n\nvar _metadata = {\n  store: store,\n  map: getOrCreateMetadataMap,\n  has: ordinaryHasOwnMetadata,\n  get: ordinaryGetOwnMetadata,\n  set: ordinaryDefineOwnMetadata,\n  keys: ordinaryOwnMetadataKeys,\n  key: toMetaKey,\n  exp: exp$3\n};\n\nvar toMetaKey$1 = _metadata.key;\nvar ordinaryDefineOwnMetadata$1 = _metadata.set;\n\n_metadata.exp({ defineMetadata: function defineMetadata(metadataKey, metadataValue, target, targetKey) {\n  ordinaryDefineOwnMetadata$1(metadataKey, metadataValue, _anObject(target), toMetaKey$1(targetKey));\n} });\n\nvar toMetaKey$2 = _metadata.key;\nvar getOrCreateMetadataMap$1 = _metadata.map;\nvar store$1 = _metadata.store;\n\n_metadata.exp({ deleteMetadata: function deleteMetadata(metadataKey, target /* , targetKey */) {\n  var targetKey = arguments.length < 3 ? undefined : toMetaKey$2(arguments[2]);\n  var metadataMap = getOrCreateMetadataMap$1(_anObject(target), targetKey, false);\n  if (metadataMap === undefined || !metadataMap['delete'](metadataKey)) return false;\n  if (metadataMap.size) return true;\n  var targetMetadata = store$1.get(target);\n  targetMetadata['delete'](targetKey);\n  return !!targetMetadata.size || store$1['delete'](target);\n} });\n\nvar ordinaryHasOwnMetadata$1 = _metadata.has;\nvar ordinaryGetOwnMetadata$1 = _metadata.get;\nvar toMetaKey$3 = _metadata.key;\n\nvar ordinaryGetMetadata = function (MetadataKey, O, P) {\n  var hasOwn = ordinaryHasOwnMetadata$1(MetadataKey, O, P);\n  if (hasOwn) return ordinaryGetOwnMetadata$1(MetadataKey, O, P);\n  var parent = _objectGpo(O);\n  return parent !== null ? ordinaryGetMetadata(MetadataKey, parent, P) : undefined;\n};\n\n_metadata.exp({ getMetadata: function getMetadata(metadataKey, target /* , targetKey */) {\n  return ordinaryGetMetadata(metadataKey, _anObject(target), arguments.length < 3 ? undefined : toMetaKey$3(arguments[2]));\n} });\n\nvar ordinaryOwnMetadataKeys$1 = _metadata.keys;\nvar toMetaKey$4 = _metadata.key;\n\nvar ordinaryMetadataKeys = function (O, P) {\n  var oKeys = ordinaryOwnMetadataKeys$1(O, P);\n  var parent = _objectGpo(O);\n  if (parent === null) return oKeys;\n  var pKeys = ordinaryMetadataKeys(parent, P);\n  return pKeys.length ? oKeys.length ? _arrayFromIterable(new es6_set(oKeys.concat(pKeys))) : pKeys : oKeys;\n};\n\n_metadata.exp({ getMetadataKeys: function getMetadataKeys(target /* , targetKey */) {\n  return ordinaryMetadataKeys(_anObject(target), arguments.length < 2 ? undefined : toMetaKey$4(arguments[1]));\n} });\n\nvar ordinaryGetOwnMetadata$2 = _metadata.get;\nvar toMetaKey$5 = _metadata.key;\n\n_metadata.exp({ getOwnMetadata: function getOwnMetadata(metadataKey, target /* , targetKey */) {\n  return ordinaryGetOwnMetadata$2(metadataKey, _anObject(target)\n    , arguments.length < 3 ? undefined : toMetaKey$5(arguments[2]));\n} });\n\nvar ordinaryOwnMetadataKeys$2 = _metadata.keys;\nvar toMetaKey$6 = _metadata.key;\n\n_metadata.exp({ getOwnMetadataKeys: function getOwnMetadataKeys(target /* , targetKey */) {\n  return ordinaryOwnMetadataKeys$2(_anObject(target), arguments.length < 2 ? undefined : toMetaKey$6(arguments[1]));\n} });\n\nvar ordinaryHasOwnMetadata$2 = _metadata.has;\nvar toMetaKey$7 = _metadata.key;\n\nvar ordinaryHasMetadata = function (MetadataKey, O, P) {\n  var hasOwn = ordinaryHasOwnMetadata$2(MetadataKey, O, P);\n  if (hasOwn) return true;\n  var parent = _objectGpo(O);\n  return parent !== null ? ordinaryHasMetadata(MetadataKey, parent, P) : false;\n};\n\n_metadata.exp({ hasMetadata: function hasMetadata(metadataKey, target /* , targetKey */) {\n  return ordinaryHasMetadata(metadataKey, _anObject(target), arguments.length < 3 ? undefined : toMetaKey$7(arguments[2]));\n} });\n\nvar ordinaryHasOwnMetadata$3 = _metadata.has;\nvar toMetaKey$8 = _metadata.key;\n\n_metadata.exp({ hasOwnMetadata: function hasOwnMetadata(metadataKey, target /* , targetKey */) {\n  return ordinaryHasOwnMetadata$3(metadataKey, _anObject(target)\n    , arguments.length < 3 ? undefined : toMetaKey$8(arguments[2]));\n} });\n\nvar toMetaKey$9 = _metadata.key;\nvar ordinaryDefineOwnMetadata$2 = _metadata.set;\n\n_metadata.exp({ metadata: function metadata(metadataKey, metadataValue) {\n  return function decorator(target, targetKey) {\n    ordinaryDefineOwnMetadata$2(\n      metadataKey, metadataValue,\n      (targetKey !== undefined ? _anObject : _aFunction)(target),\n      toMetaKey$9(targetKey)\n    );\n  };\n} });\n\n// https://github.com/rwaldron/tc39-notes/blob/master/es6/2014-09/sept-25.md#510-globalasap-for-enqueuing-a-microtask\n\nvar microtask$1 = _microtask();\nvar process$3 = _global.process;\nvar isNode$2 = _cof(process$3) == 'process';\n\n_export(_export.G, {\n  asap: function asap(fn) {\n    var domain = isNode$2 && process$3.domain;\n    microtask$1(domain ? domain.bind(fn) : fn);\n  }\n});\n\n// https://github.com/zenparsing/es-observable\n\n\n\nvar microtask$2 = _microtask();\nvar OBSERVABLE = _wks('observable');\n\n\n\n\n\n\nvar RETURN = _forOf.RETURN;\n\nvar getMethod = function (fn) {\n  return fn == null ? undefined : _aFunction(fn);\n};\n\nvar cleanupSubscription = function (subscription) {\n  var cleanup = subscription._c;\n  if (cleanup) {\n    subscription._c = undefined;\n    cleanup();\n  }\n};\n\nvar subscriptionClosed = function (subscription) {\n  return subscription._o === undefined;\n};\n\nvar closeSubscription = function (subscription) {\n  if (!subscriptionClosed(subscription)) {\n    subscription._o = undefined;\n    cleanupSubscription(subscription);\n  }\n};\n\nvar Subscription = function (observer, subscriber) {\n  _anObject(observer);\n  this._c = undefined;\n  this._o = observer;\n  observer = new SubscriptionObserver(this);\n  try {\n    var cleanup = subscriber(observer);\n    var subscription = cleanup;\n    if (cleanup != null) {\n      if (typeof cleanup.unsubscribe === 'function') cleanup = function () { subscription.unsubscribe(); };\n      else _aFunction(cleanup);\n      this._c = cleanup;\n    }\n  } catch (e) {\n    observer.error(e);\n    return;\n  } if (subscriptionClosed(this)) cleanupSubscription(this);\n};\n\nSubscription.prototype = _redefineAll({}, {\n  unsubscribe: function unsubscribe() { closeSubscription(this); }\n});\n\nvar SubscriptionObserver = function (subscription) {\n  this._s = subscription;\n};\n\nSubscriptionObserver.prototype = _redefineAll({}, {\n  next: function next(value) {\n    var subscription = this._s;\n    if (!subscriptionClosed(subscription)) {\n      var observer = subscription._o;\n      try {\n        var m = getMethod(observer.next);\n        if (m) return m.call(observer, value);\n      } catch (e) {\n        try {\n          closeSubscription(subscription);\n        } finally {\n          throw e;\n        }\n      }\n    }\n  },\n  error: function error(value) {\n    var subscription = this._s;\n    if (subscriptionClosed(subscription)) throw value;\n    var observer = subscription._o;\n    subscription._o = undefined;\n    try {\n      var m = getMethod(observer.error);\n      if (!m) throw value;\n      value = m.call(observer, value);\n    } catch (e) {\n      try {\n        cleanupSubscription(subscription);\n      } finally {\n        throw e;\n      }\n    } cleanupSubscription(subscription);\n    return value;\n  },\n  complete: function complete(value) {\n    var subscription = this._s;\n    if (!subscriptionClosed(subscription)) {\n      var observer = subscription._o;\n      subscription._o = undefined;\n      try {\n        var m = getMethod(observer.complete);\n        value = m ? m.call(observer, value) : undefined;\n      } catch (e) {\n        try {\n          cleanupSubscription(subscription);\n        } finally {\n          throw e;\n        }\n      } cleanupSubscription(subscription);\n      return value;\n    }\n  }\n});\n\nvar $Observable = function Observable(subscriber) {\n  _anInstance(this, $Observable, 'Observable', '_f')._f = _aFunction(subscriber);\n};\n\n_redefineAll($Observable.prototype, {\n  subscribe: function subscribe(observer) {\n    return new Subscription(observer, this._f);\n  },\n  forEach: function forEach(fn) {\n    var that = this;\n    return new (_core.Promise || _global.Promise)(function (resolve, reject) {\n      _aFunction(fn);\n      var subscription = that.subscribe({\n        next: function (value) {\n          try {\n            return fn(value);\n          } catch (e) {\n            reject(e);\n            subscription.unsubscribe();\n          }\n        },\n        error: reject,\n        complete: resolve\n      });\n    });\n  }\n});\n\n_redefineAll($Observable, {\n  from: function from(x) {\n    var C = typeof this === 'function' ? this : $Observable;\n    var method = getMethod(_anObject(x)[OBSERVABLE]);\n    if (method) {\n      var observable = _anObject(method.call(x));\n      return observable.constructor === C ? observable : new C(function (observer) {\n        return observable.subscribe(observer);\n      });\n    }\n    return new C(function (observer) {\n      var done = false;\n      microtask$2(function () {\n        if (!done) {\n          try {\n            if (_forOf(x, false, function (it) {\n              observer.next(it);\n              if (done) return RETURN;\n            }) === RETURN) return;\n          } catch (e) {\n            if (done) throw e;\n            observer.error(e);\n            return;\n          } observer.complete();\n        }\n      });\n      return function () { done = true; };\n    });\n  },\n  of: function of() {\n    for (var i = 0, l = arguments.length, items = new Array(l); i < l;) items[i] = arguments[i++];\n    return new (typeof this === 'function' ? this : $Observable)(function (observer) {\n      var done = false;\n      microtask$2(function () {\n        if (!done) {\n          for (var j = 0; j < items.length; ++j) {\n            observer.next(items[j]);\n            if (done) return;\n          } observer.complete();\n        }\n      });\n      return function () { done = true; };\n    });\n  }\n});\n\n_hide($Observable.prototype, OBSERVABLE, function () { return this; });\n\n_export(_export.G, { Observable: $Observable });\n\n_setSpecies('Observable');\n\n// ie9- setTimeout & setInterval additional parameters fix\n\n\n\nvar slice = [].slice;\nvar MSIE = /MSIE .\\./.test(_userAgent); // <- dirty ie9- check\nvar wrap$1 = function (set) {\n  return function (fn, time /* , ...args */) {\n    var boundArgs = arguments.length > 2;\n    var args = boundArgs ? slice.call(arguments, 2) : false;\n    return set(boundArgs ? function () {\n      // eslint-disable-next-line no-new-func\n      (typeof fn == 'function' ? fn : Function(fn)).apply(this, args);\n    } : fn, time);\n  };\n};\n_export(_export.G + _export.B + _export.F * MSIE, {\n  setTimeout: wrap$1(_global.setTimeout),\n  setInterval: wrap$1(_global.setInterval)\n});\n\n_export(_export.G + _export.B, {\n  setImmediate: _task.set,\n  clearImmediate: _task.clear\n});\n\nvar ITERATOR$4 = _wks('iterator');\nvar TO_STRING_TAG = _wks('toStringTag');\nvar ArrayValues = _iterators.Array;\n\nvar DOMIterables = {\n  CSSRuleList: true, // TODO: Not spec compliant, should be false.\n  CSSStyleDeclaration: false,\n  CSSValueList: false,\n  ClientRectList: false,\n  DOMRectList: false,\n  DOMStringList: false,\n  DOMTokenList: true,\n  DataTransferItemList: false,\n  FileList: false,\n  HTMLAllCollection: false,\n  HTMLCollection: false,\n  HTMLFormElement: false,\n  HTMLSelectElement: false,\n  MediaList: true, // TODO: Not spec compliant, should be false.\n  MimeTypeArray: false,\n  NamedNodeMap: false,\n  NodeList: true,\n  PaintRequestList: false,\n  Plugin: false,\n  PluginArray: false,\n  SVGLengthList: false,\n  SVGNumberList: false,\n  SVGPathSegList: false,\n  SVGPointList: false,\n  SVGStringList: false,\n  SVGTransformList: false,\n  SourceBufferList: false,\n  StyleSheetList: true, // TODO: Not spec compliant, should be false.\n  TextTrackCueList: false,\n  TextTrackList: false,\n  TouchList: false\n};\n\nfor (var collections = _objectKeys(DOMIterables), i$2 = 0; i$2 < collections.length; i$2++) {\n  var NAME$1 = collections[i$2];\n  var explicit = DOMIterables[NAME$1];\n  var Collection = _global[NAME$1];\n  var proto$3 = Collection && Collection.prototype;\n  var key$1;\n  if (proto$3) {\n    if (!proto$3[ITERATOR$4]) _hide(proto$3, ITERATOR$4, ArrayValues);\n    if (!proto$3[TO_STRING_TAG]) _hide(proto$3, TO_STRING_TAG, NAME$1);\n    _iterators[NAME$1] = ArrayValues;\n    if (explicit) for (key$1 in es6_array_iterator) if (!proto$3[key$1]) _redefine(proto$3, key$1, es6_array_iterator[key$1], true);\n  }\n}\n\nvar runtime = createCommonjsModule(function (module) {\n/**\n * Copyright (c) 2014, Facebook, Inc.\n * All rights reserved.\n *\n * This source code is licensed under the BSD-style license found in the\n * https://raw.github.com/facebook/regenerator/master/LICENSE file. An\n * additional grant of patent rights can be found in the PATENTS file in\n * the same directory.\n */\n\n!(function(global) {\n\n  var Op = Object.prototype;\n  var hasOwn = Op.hasOwnProperty;\n  var undefined$1; // More compressible than void 0.\n  var $Symbol = typeof Symbol === \"function\" ? Symbol : {};\n  var iteratorSymbol = $Symbol.iterator || \"@@iterator\";\n  var asyncIteratorSymbol = $Symbol.asyncIterator || \"@@asyncIterator\";\n  var toStringTagSymbol = $Symbol.toStringTag || \"@@toStringTag\";\n  var runtime = global.regeneratorRuntime;\n  if (runtime) {\n    {\n      // If regeneratorRuntime is defined globally and we're in a module,\n      // make the exports object identical to regeneratorRuntime.\n      module.exports = runtime;\n    }\n    // Don't bother evaluating the rest of this file if the runtime was\n    // already defined globally.\n    return;\n  }\n\n  // Define the runtime globally (as expected by generated code) as either\n  // module.exports (if we're in a module) or a new, empty object.\n  runtime = global.regeneratorRuntime =  module.exports ;\n\n  function wrap(innerFn, outerFn, self, tryLocsList) {\n    // If outerFn provided and outerFn.prototype is a Generator, then outerFn.prototype instanceof Generator.\n    var protoGenerator = outerFn && outerFn.prototype instanceof Generator ? outerFn : Generator;\n    var generator = Object.create(protoGenerator.prototype);\n    var context = new Context(tryLocsList || []);\n\n    // The ._invoke method unifies the implementations of the .next,\n    // .throw, and .return methods.\n    generator._invoke = makeInvokeMethod(innerFn, self, context);\n\n    return generator;\n  }\n  runtime.wrap = wrap;\n\n  // Try/catch helper to minimize deoptimizations. Returns a completion\n  // record like context.tryEntries[i].completion. This interface could\n  // have been (and was previously) designed to take a closure to be\n  // invoked without arguments, but in all the cases we care about we\n  // already have an existing method we want to call, so there's no need\n  // to create a new function object. We can even get away with assuming\n  // the method takes exactly one argument, since that happens to be true\n  // in every case, so we don't have to touch the arguments object. The\n  // only additional allocation required is the completion record, which\n  // has a stable shape and so hopefully should be cheap to allocate.\n  function tryCatch(fn, obj, arg) {\n    try {\n      return { type: \"normal\", arg: fn.call(obj, arg) };\n    } catch (err) {\n      return { type: \"throw\", arg: err };\n    }\n  }\n\n  var GenStateSuspendedStart = \"suspendedStart\";\n  var GenStateSuspendedYield = \"suspendedYield\";\n  var GenStateExecuting = \"executing\";\n  var GenStateCompleted = \"completed\";\n\n  // Returning this object from the innerFn has the same effect as\n  // breaking out of the dispatch switch statement.\n  var ContinueSentinel = {};\n\n  // Dummy constructor functions that we use as the .constructor and\n  // .constructor.prototype properties for functions that return Generator\n  // objects. For full spec compliance, you may wish to configure your\n  // minifier not to mangle the names of these two functions.\n  function Generator() {}\n  function GeneratorFunction() {}\n  function GeneratorFunctionPrototype() {}\n\n  // This is a polyfill for %IteratorPrototype% for environments that\n  // don't natively support it.\n  var IteratorPrototype = {};\n  IteratorPrototype[iteratorSymbol] = function () {\n    return this;\n  };\n\n  var getProto = Object.getPrototypeOf;\n  var NativeIteratorPrototype = getProto && getProto(getProto(values([])));\n  if (NativeIteratorPrototype &&\n      NativeIteratorPrototype !== Op &&\n      hasOwn.call(NativeIteratorPrototype, iteratorSymbol)) {\n    // This environment has a native %IteratorPrototype%; use it instead\n    // of the polyfill.\n    IteratorPrototype = NativeIteratorPrototype;\n  }\n\n  var Gp = GeneratorFunctionPrototype.prototype =\n    Generator.prototype = Object.create(IteratorPrototype);\n  GeneratorFunction.prototype = Gp.constructor = GeneratorFunctionPrototype;\n  GeneratorFunctionPrototype.constructor = GeneratorFunction;\n  GeneratorFunctionPrototype[toStringTagSymbol] =\n    GeneratorFunction.displayName = \"GeneratorFunction\";\n\n  // Helper for defining the .next, .throw, and .return methods of the\n  // Iterator interface in terms of a single ._invoke method.\n  function defineIteratorMethods(prototype) {\n    [\"next\", \"throw\", \"return\"].forEach(function(method) {\n      prototype[method] = function(arg) {\n        return this._invoke(method, arg);\n      };\n    });\n  }\n\n  runtime.isGeneratorFunction = function(genFun) {\n    var ctor = typeof genFun === \"function\" && genFun.constructor;\n    return ctor\n      ? ctor === GeneratorFunction ||\n        // For the native GeneratorFunction constructor, the best we can\n        // do is to check its .name property.\n        (ctor.displayName || ctor.name) === \"GeneratorFunction\"\n      : false;\n  };\n\n  runtime.mark = function(genFun) {\n    if (Object.setPrototypeOf) {\n      Object.setPrototypeOf(genFun, GeneratorFunctionPrototype);\n    } else {\n      genFun.__proto__ = GeneratorFunctionPrototype;\n      if (!(toStringTagSymbol in genFun)) {\n        genFun[toStringTagSymbol] = \"GeneratorFunction\";\n      }\n    }\n    genFun.prototype = Object.create(Gp);\n    return genFun;\n  };\n\n  // Within the body of any async function, `await x` is transformed to\n  // `yield regeneratorRuntime.awrap(x)`, so that the runtime can test\n  // `hasOwn.call(value, \"__await\")` to determine if the yielded value is\n  // meant to be awaited.\n  runtime.awrap = function(arg) {\n    return { __await: arg };\n  };\n\n  function AsyncIterator(generator) {\n    function invoke(method, arg, resolve, reject) {\n      var record = tryCatch(generator[method], generator, arg);\n      if (record.type === \"throw\") {\n        reject(record.arg);\n      } else {\n        var result = record.arg;\n        var value = result.value;\n        if (value &&\n            typeof value === \"object\" &&\n            hasOwn.call(value, \"__await\")) {\n          return Promise.resolve(value.__await).then(function(value) {\n            invoke(\"next\", value, resolve, reject);\n          }, function(err) {\n            invoke(\"throw\", err, resolve, reject);\n          });\n        }\n\n        return Promise.resolve(value).then(function(unwrapped) {\n          // When a yielded Promise is resolved, its final value becomes\n          // the .value of the Promise<{value,done}> result for the\n          // current iteration. If the Promise is rejected, however, the\n          // result for this iteration will be rejected with the same\n          // reason. Note that rejections of yielded Promises are not\n          // thrown back into the generator function, as is the case\n          // when an awaited Promise is rejected. This difference in\n          // behavior between yield and await is important, because it\n          // allows the consumer to decide what to do with the yielded\n          // rejection (swallow it and continue, manually .throw it back\n          // into the generator, abandon iteration, whatever). With\n          // await, by contrast, there is no opportunity to examine the\n          // rejection reason outside the generator function, so the\n          // only option is to throw it from the await expression, and\n          // let the generator function handle the exception.\n          result.value = unwrapped;\n          resolve(result);\n        }, reject);\n      }\n    }\n\n    if (typeof global.process === \"object\" && global.process.domain) {\n      invoke = global.process.domain.bind(invoke);\n    }\n\n    var previousPromise;\n\n    function enqueue(method, arg) {\n      function callInvokeWithMethodAndArg() {\n        return new Promise(function(resolve, reject) {\n          invoke(method, arg, resolve, reject);\n        });\n      }\n\n      return previousPromise =\n        // If enqueue has been called before, then we want to wait until\n        // all previous Promises have been resolved before calling invoke,\n        // so that results are always delivered in the correct order. If\n        // enqueue has not been called before, then it is important to\n        // call invoke immediately, without waiting on a callback to fire,\n        // so that the async generator function has the opportunity to do\n        // any necessary setup in a predictable way. This predictability\n        // is why the Promise constructor synchronously invokes its\n        // executor callback, and why async functions synchronously\n        // execute code before the first await. Since we implement simple\n        // async functions in terms of async generators, it is especially\n        // important to get this right, even though it requires care.\n        previousPromise ? previousPromise.then(\n          callInvokeWithMethodAndArg,\n          // Avoid propagating failures to Promises returned by later\n          // invocations of the iterator.\n          callInvokeWithMethodAndArg\n        ) : callInvokeWithMethodAndArg();\n    }\n\n    // Define the unified helper method that is used to implement .next,\n    // .throw, and .return (see defineIteratorMethods).\n    this._invoke = enqueue;\n  }\n\n  defineIteratorMethods(AsyncIterator.prototype);\n  AsyncIterator.prototype[asyncIteratorSymbol] = function () {\n    return this;\n  };\n  runtime.AsyncIterator = AsyncIterator;\n\n  // Note that simple async functions are implemented on top of\n  // AsyncIterator objects; they just return a Promise for the value of\n  // the final result produced by the iterator.\n  runtime.async = function(innerFn, outerFn, self, tryLocsList) {\n    var iter = new AsyncIterator(\n      wrap(innerFn, outerFn, self, tryLocsList)\n    );\n\n    return runtime.isGeneratorFunction(outerFn)\n      ? iter // If outerFn is a generator, return the full iterator.\n      : iter.next().then(function(result) {\n          return result.done ? result.value : iter.next();\n        });\n  };\n\n  function makeInvokeMethod(innerFn, self, context) {\n    var state = GenStateSuspendedStart;\n\n    return function invoke(method, arg) {\n      if (state === GenStateExecuting) {\n        throw new Error(\"Generator is already running\");\n      }\n\n      if (state === GenStateCompleted) {\n        if (method === \"throw\") {\n          throw arg;\n        }\n\n        // Be forgiving, per 25.3.3.3.3 of the spec:\n        // https://people.mozilla.org/~jorendorff/es6-draft.html#sec-generatorresume\n        return doneResult();\n      }\n\n      context.method = method;\n      context.arg = arg;\n\n      while (true) {\n        var delegate = context.delegate;\n        if (delegate) {\n          var delegateResult = maybeInvokeDelegate(delegate, context);\n          if (delegateResult) {\n            if (delegateResult === ContinueSentinel) continue;\n            return delegateResult;\n          }\n        }\n\n        if (context.method === \"next\") {\n          // Setting context._sent for legacy support of Babel's\n          // function.sent implementation.\n          context.sent = context._sent = context.arg;\n\n        } else if (context.method === \"throw\") {\n          if (state === GenStateSuspendedStart) {\n            state = GenStateCompleted;\n            throw context.arg;\n          }\n\n          context.dispatchException(context.arg);\n\n        } else if (context.method === \"return\") {\n          context.abrupt(\"return\", context.arg);\n        }\n\n        state = GenStateExecuting;\n\n        var record = tryCatch(innerFn, self, context);\n        if (record.type === \"normal\") {\n          // If an exception is thrown from innerFn, we leave state ===\n          // GenStateExecuting and loop back for another invocation.\n          state = context.done\n            ? GenStateCompleted\n            : GenStateSuspendedYield;\n\n          if (record.arg === ContinueSentinel) {\n            continue;\n          }\n\n          return {\n            value: record.arg,\n            done: context.done\n          };\n\n        } else if (record.type === \"throw\") {\n          state = GenStateCompleted;\n          // Dispatch the exception by looping back around to the\n          // context.dispatchException(context.arg) call above.\n          context.method = \"throw\";\n          context.arg = record.arg;\n        }\n      }\n    };\n  }\n\n  // Call delegate.iterator[context.method](context.arg) and handle the\n  // result, either by returning a { value, done } result from the\n  // delegate iterator, or by modifying context.method and context.arg,\n  // setting context.delegate to null, and returning the ContinueSentinel.\n  function maybeInvokeDelegate(delegate, context) {\n    var method = delegate.iterator[context.method];\n    if (method === undefined$1) {\n      // A .throw or .return when the delegate iterator has no .throw\n      // method always terminates the yield* loop.\n      context.delegate = null;\n\n      if (context.method === \"throw\") {\n        if (delegate.iterator.return) {\n          // If the delegate iterator has a return method, give it a\n          // chance to clean up.\n          context.method = \"return\";\n          context.arg = undefined$1;\n          maybeInvokeDelegate(delegate, context);\n\n          if (context.method === \"throw\") {\n            // If maybeInvokeDelegate(context) changed context.method from\n            // \"return\" to \"throw\", let that override the TypeError below.\n            return ContinueSentinel;\n          }\n        }\n\n        context.method = \"throw\";\n        context.arg = new TypeError(\n          \"The iterator does not provide a 'throw' method\");\n      }\n\n      return ContinueSentinel;\n    }\n\n    var record = tryCatch(method, delegate.iterator, context.arg);\n\n    if (record.type === \"throw\") {\n      context.method = \"throw\";\n      context.arg = record.arg;\n      context.delegate = null;\n      return ContinueSentinel;\n    }\n\n    var info = record.arg;\n\n    if (! info) {\n      context.method = \"throw\";\n      context.arg = new TypeError(\"iterator result is not an object\");\n      context.delegate = null;\n      return ContinueSentinel;\n    }\n\n    if (info.done) {\n      // Assign the result of the finished delegate to the temporary\n      // variable specified by delegate.resultName (see delegateYield).\n      context[delegate.resultName] = info.value;\n\n      // Resume execution at the desired location (see delegateYield).\n      context.next = delegate.nextLoc;\n\n      // If context.method was \"throw\" but the delegate handled the\n      // exception, let the outer generator proceed normally. If\n      // context.method was \"next\", forget context.arg since it has been\n      // \"consumed\" by the delegate iterator. If context.method was\n      // \"return\", allow the original .return call to continue in the\n      // outer generator.\n      if (context.method !== \"return\") {\n        context.method = \"next\";\n        context.arg = undefined$1;\n      }\n\n    } else {\n      // Re-yield the result returned by the delegate method.\n      return info;\n    }\n\n    // The delegate iterator is finished, so forget it and continue with\n    // the outer generator.\n    context.delegate = null;\n    return ContinueSentinel;\n  }\n\n  // Define Generator.prototype.{next,throw,return} in terms of the\n  // unified ._invoke helper method.\n  defineIteratorMethods(Gp);\n\n  Gp[toStringTagSymbol] = \"Generator\";\n\n  // A Generator should always return itself as the iterator object when the\n  // @@iterator function is called on it. Some browsers' implementations of the\n  // iterator prototype chain incorrectly implement this, causing the Generator\n  // object to not be returned from this call. This ensures that doesn't happen.\n  // See https://github.com/facebook/regenerator/issues/274 for more details.\n  Gp[iteratorSymbol] = function() {\n    return this;\n  };\n\n  Gp.toString = function() {\n    return \"[object Generator]\";\n  };\n\n  function pushTryEntry(locs) {\n    var entry = { tryLoc: locs[0] };\n\n    if (1 in locs) {\n      entry.catchLoc = locs[1];\n    }\n\n    if (2 in locs) {\n      entry.finallyLoc = locs[2];\n      entry.afterLoc = locs[3];\n    }\n\n    this.tryEntries.push(entry);\n  }\n\n  function resetTryEntry(entry) {\n    var record = entry.completion || {};\n    record.type = \"normal\";\n    delete record.arg;\n    entry.completion = record;\n  }\n\n  function Context(tryLocsList) {\n    // The root entry object (effectively a try statement without a catch\n    // or a finally block) gives us a place to store values thrown from\n    // locations where there is no enclosing try statement.\n    this.tryEntries = [{ tryLoc: \"root\" }];\n    tryLocsList.forEach(pushTryEntry, this);\n    this.reset(true);\n  }\n\n  runtime.keys = function(object) {\n    var keys = [];\n    for (var key in object) {\n      keys.push(key);\n    }\n    keys.reverse();\n\n    // Rather than returning an object with a next method, we keep\n    // things simple and return the next function itself.\n    return function next() {\n      while (keys.length) {\n        var key = keys.pop();\n        if (key in object) {\n          next.value = key;\n          next.done = false;\n          return next;\n        }\n      }\n\n      // To avoid creating an additional object, we just hang the .value\n      // and .done properties off the next function object itself. This\n      // also ensures that the minifier will not anonymize the function.\n      next.done = true;\n      return next;\n    };\n  };\n\n  function values(iterable) {\n    if (iterable) {\n      var iteratorMethod = iterable[iteratorSymbol];\n      if (iteratorMethod) {\n        return iteratorMethod.call(iterable);\n      }\n\n      if (typeof iterable.next === \"function\") {\n        return iterable;\n      }\n\n      if (!isNaN(iterable.length)) {\n        var i = -1, next = function next() {\n          while (++i < iterable.length) {\n            if (hasOwn.call(iterable, i)) {\n              next.value = iterable[i];\n              next.done = false;\n              return next;\n            }\n          }\n\n          next.value = undefined$1;\n          next.done = true;\n\n          return next;\n        };\n\n        return next.next = next;\n      }\n    }\n\n    // Return an iterator with no values.\n    return { next: doneResult };\n  }\n  runtime.values = values;\n\n  function doneResult() {\n    return { value: undefined$1, done: true };\n  }\n\n  Context.prototype = {\n    constructor: Context,\n\n    reset: function(skipTempReset) {\n      this.prev = 0;\n      this.next = 0;\n      // Resetting context._sent for legacy support of Babel's\n      // function.sent implementation.\n      this.sent = this._sent = undefined$1;\n      this.done = false;\n      this.delegate = null;\n\n      this.method = \"next\";\n      this.arg = undefined$1;\n\n      this.tryEntries.forEach(resetTryEntry);\n\n      if (!skipTempReset) {\n        for (var name in this) {\n          // Not sure about the optimal order of these conditions:\n          if (name.charAt(0) === \"t\" &&\n              hasOwn.call(this, name) &&\n              !isNaN(+name.slice(1))) {\n            this[name] = undefined$1;\n          }\n        }\n      }\n    },\n\n    stop: function() {\n      this.done = true;\n\n      var rootEntry = this.tryEntries[0];\n      var rootRecord = rootEntry.completion;\n      if (rootRecord.type === \"throw\") {\n        throw rootRecord.arg;\n      }\n\n      return this.rval;\n    },\n\n    dispatchException: function(exception) {\n      if (this.done) {\n        throw exception;\n      }\n\n      var context = this;\n      function handle(loc, caught) {\n        record.type = \"throw\";\n        record.arg = exception;\n        context.next = loc;\n\n        if (caught) {\n          // If the dispatched exception was caught by a catch block,\n          // then let that catch block handle the exception normally.\n          context.method = \"next\";\n          context.arg = undefined$1;\n        }\n\n        return !! caught;\n      }\n\n      for (var i = this.tryEntries.length - 1; i >= 0; --i) {\n        var entry = this.tryEntries[i];\n        var record = entry.completion;\n\n        if (entry.tryLoc === \"root\") {\n          // Exception thrown outside of any try block that could handle\n          // it, so set the completion value of the entire function to\n          // throw the exception.\n          return handle(\"end\");\n        }\n\n        if (entry.tryLoc <= this.prev) {\n          var hasCatch = hasOwn.call(entry, \"catchLoc\");\n          var hasFinally = hasOwn.call(entry, \"finallyLoc\");\n\n          if (hasCatch && hasFinally) {\n            if (this.prev < entry.catchLoc) {\n              return handle(entry.catchLoc, true);\n            } else if (this.prev < entry.finallyLoc) {\n              return handle(entry.finallyLoc);\n            }\n\n          } else if (hasCatch) {\n            if (this.prev < entry.catchLoc) {\n              return handle(entry.catchLoc, true);\n            }\n\n          } else if (hasFinally) {\n            if (this.prev < entry.finallyLoc) {\n              return handle(entry.finallyLoc);\n            }\n\n          } else {\n            throw new Error(\"try statement without catch or finally\");\n          }\n        }\n      }\n    },\n\n    abrupt: function(type, arg) {\n      for (var i = this.tryEntries.length - 1; i >= 0; --i) {\n        var entry = this.tryEntries[i];\n        if (entry.tryLoc <= this.prev &&\n            hasOwn.call(entry, \"finallyLoc\") &&\n            this.prev < entry.finallyLoc) {\n          var finallyEntry = entry;\n          break;\n        }\n      }\n\n      if (finallyEntry &&\n          (type === \"break\" ||\n           type === \"continue\") &&\n          finallyEntry.tryLoc <= arg &&\n          arg <= finallyEntry.finallyLoc) {\n        // Ignore the finally entry if control is not jumping to a\n        // location outside the try/catch block.\n        finallyEntry = null;\n      }\n\n      var record = finallyEntry ? finallyEntry.completion : {};\n      record.type = type;\n      record.arg = arg;\n\n      if (finallyEntry) {\n        this.method = \"next\";\n        this.next = finallyEntry.finallyLoc;\n        return ContinueSentinel;\n      }\n\n      return this.complete(record);\n    },\n\n    complete: function(record, afterLoc) {\n      if (record.type === \"throw\") {\n        throw record.arg;\n      }\n\n      if (record.type === \"break\" ||\n          record.type === \"continue\") {\n        this.next = record.arg;\n      } else if (record.type === \"return\") {\n        this.rval = this.arg = record.arg;\n        this.method = \"return\";\n        this.next = \"end\";\n      } else if (record.type === \"normal\" && afterLoc) {\n        this.next = afterLoc;\n      }\n\n      return ContinueSentinel;\n    },\n\n    finish: function(finallyLoc) {\n      for (var i = this.tryEntries.length - 1; i >= 0; --i) {\n        var entry = this.tryEntries[i];\n        if (entry.finallyLoc === finallyLoc) {\n          this.complete(entry.completion, entry.afterLoc);\n          resetTryEntry(entry);\n          return ContinueSentinel;\n        }\n      }\n    },\n\n    \"catch\": function(tryLoc) {\n      for (var i = this.tryEntries.length - 1; i >= 0; --i) {\n        var entry = this.tryEntries[i];\n        if (entry.tryLoc === tryLoc) {\n          var record = entry.completion;\n          if (record.type === \"throw\") {\n            var thrown = record.arg;\n            resetTryEntry(entry);\n          }\n          return thrown;\n        }\n      }\n\n      // The context.catch method must only be called with a location\n      // argument that corresponds to a known catch block.\n      throw new Error(\"illegal catch attempt\");\n    },\n\n    delegateYield: function(iterable, resultName, nextLoc) {\n      this.delegate = {\n        iterator: values(iterable),\n        resultName: resultName,\n        nextLoc: nextLoc\n      };\n\n      if (this.method === \"next\") {\n        // Deliberately forget the last sent value so that we don't\n        // accidentally pass it on to the delegate.\n        this.arg = undefined$1;\n      }\n\n      return ContinueSentinel;\n    }\n  };\n})(\n  // Among the various tricks for obtaining a reference to the global\n  // object, this seems to be the most reliable technique that does not\n  // use indirect eval (which violates Content Security Policy).\n  typeof commonjsGlobal === \"object\" ? commonjsGlobal :\n  typeof window === \"object\" ? window :\n  typeof self === \"object\" ? self : commonjsGlobal\n);\n});\n\nvar _replacer = function (regExp, replace) {\n  var replacer = replace === Object(replace) ? function (part) {\n    return replace[part];\n  } : replace;\n  return function (it) {\n    return String(it).replace(regExp, replacer);\n  };\n};\n\n// https://github.com/benjamingr/RexExp.escape\n\nvar $re = _replacer(/[\\\\^$*+?.()|[\\]{}]/g, '\\\\$&');\n\n_export(_export.S, 'RegExp', { escape: function escape(it) { return $re(it); } });\n\nvar _escape = _core.RegExp.escape;\n\nif (commonjsGlobal._babelPolyfill) {\n  throw new Error(\"only one instance of babel-polyfill is allowed\");\n}\ncommonjsGlobal._babelPolyfill = true;\n\nvar DEFINE_PROPERTY = \"defineProperty\";\nfunction define$1(O, key, value) {\n  O[key] || Object[DEFINE_PROPERTY](O, key, {\n    writable: true,\n    configurable: true,\n    value: value\n  });\n}\n\ndefine$1(String.prototype, \"padLeft\", \"\".padStart);\ndefine$1(String.prototype, \"padRight\", \"\".padEnd);\n\n\"pop,reverse,shift,keys,values,entries,indexOf,every,some,forEach,map,filter,find,findIndex,includes,join,slice,concat,push,splice,unshift,sort,lastIndexOf,reduce,reduceRight,copyWithin,fill\".split(\",\").forEach(function (key) {\n  [][key] && define$1(Array, key, Function.call.bind([][key]));\n});\n\n/**\n * @license\n * webxr-polyfill\n * Copyright (c) 2017 Google\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @license\n * cardboard-vr-display\n * Copyright (c) 2015-2017 Google\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @license\n * webvr-polyfill-dpdb \n * Copyright (c) 2017 Google\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @license\n * wglu-preserve-state\n * Copyright (c) 2016, Brandon Jones.\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to deal\n * in the Software without restriction, including without limitation the rights\n * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n * copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n * THE SOFTWARE.\n */\n\n/**\n * @license\n * nosleep.js\n * Copyright (c) 2017, Rich Tibbett\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to deal\n * in the Software without restriction, including without limitation the rights\n * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n * copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n * THE SOFTWARE.\n */\n\nconst _global$1 = typeof global !== 'undefined' ? global :\n                typeof self !== 'undefined' ? self :\n                typeof window !== 'undefined' ? window : {};\n\nconst PRIVATE = Symbol('@@webxr-polyfill/EventTarget');\nclass EventTarget {\n  constructor() {\n    this[PRIVATE] = {\n      listeners: new Map(),\n    };\n  }\n  addEventListener(type, listener) {\n    if (typeof type !== 'string') { throw new Error('`type` must be a string'); }\n    if (typeof listener !== 'function') { throw new Error('`listener` must be a function'); }\n    const typedListeners = this[PRIVATE].listeners.get(type) || [];\n    typedListeners.push(listener);\n    this[PRIVATE].listeners.set(type, typedListeners);\n  }\n  removeEventListener(type, listener) {\n    if (typeof type !== 'string') { throw new Error('`type` must be a string'); }\n    if (typeof listener !== 'function') { throw new Error('`listener` must be a function'); }\n    const typedListeners = this[PRIVATE].listeners.get(type) || [];\n    for (let i = typedListeners.length; i >= 0; i--) {\n      if (typedListeners[i] === listener) {\n        typedListeners.pop();\n      }\n    }\n  }\n  dispatchEvent(type, event) {\n    const typedListeners = this[PRIVATE].listeners.get(type) || [];\n    const queue = [];\n    for (let i = 0; i < typedListeners.length; i++) {\n      queue[i] = typedListeners[i];\n    }\n    for (let listener of queue) {\n      listener(event);\n    }\n    if (typeof this[`on${type}`] === 'function') {\n      this[`on${type}`](event);\n    }\n  }\n}\n\nconst EPSILON$1 = 0.000001;\nlet ARRAY_TYPE = (typeof Float32Array !== 'undefined') ? Float32Array : Array;\n\nfunction create() {\n  let out = new ARRAY_TYPE(16);\n  if(ARRAY_TYPE != Float32Array) {\n    out[1] = 0;\n    out[2] = 0;\n    out[3] = 0;\n    out[4] = 0;\n    out[6] = 0;\n    out[7] = 0;\n    out[8] = 0;\n    out[9] = 0;\n    out[11] = 0;\n    out[12] = 0;\n    out[13] = 0;\n    out[14] = 0;\n  }\n  out[0] = 1;\n  out[5] = 1;\n  out[10] = 1;\n  out[15] = 1;\n  return out;\n}\n\nfunction copy(out, a) {\n  out[0] = a[0];\n  out[1] = a[1];\n  out[2] = a[2];\n  out[3] = a[3];\n  out[4] = a[4];\n  out[5] = a[5];\n  out[6] = a[6];\n  out[7] = a[7];\n  out[8] = a[8];\n  out[9] = a[9];\n  out[10] = a[10];\n  out[11] = a[11];\n  out[12] = a[12];\n  out[13] = a[13];\n  out[14] = a[14];\n  out[15] = a[15];\n  return out;\n}\n\n\nfunction identity(out) {\n  out[0] = 1;\n  out[1] = 0;\n  out[2] = 0;\n  out[3] = 0;\n  out[4] = 0;\n  out[5] = 1;\n  out[6] = 0;\n  out[7] = 0;\n  out[8] = 0;\n  out[9] = 0;\n  out[10] = 1;\n  out[11] = 0;\n  out[12] = 0;\n  out[13] = 0;\n  out[14] = 0;\n  out[15] = 1;\n  return out;\n}\n\nfunction invert(out, a) {\n  let a00 = a[0], a01 = a[1], a02 = a[2], a03 = a[3];\n  let a10 = a[4], a11 = a[5], a12 = a[6], a13 = a[7];\n  let a20 = a[8], a21 = a[9], a22 = a[10], a23 = a[11];\n  let a30 = a[12], a31 = a[13], a32 = a[14], a33 = a[15];\n  let b00 = a00 * a11 - a01 * a10;\n  let b01 = a00 * a12 - a02 * a10;\n  let b02 = a00 * a13 - a03 * a10;\n  let b03 = a01 * a12 - a02 * a11;\n  let b04 = a01 * a13 - a03 * a11;\n  let b05 = a02 * a13 - a03 * a12;\n  let b06 = a20 * a31 - a21 * a30;\n  let b07 = a20 * a32 - a22 * a30;\n  let b08 = a20 * a33 - a23 * a30;\n  let b09 = a21 * a32 - a22 * a31;\n  let b10 = a21 * a33 - a23 * a31;\n  let b11 = a22 * a33 - a23 * a32;\n  let det = b00 * b11 - b01 * b10 + b02 * b09 + b03 * b08 - b04 * b07 + b05 * b06;\n  if (!det) {\n    return null;\n  }\n  det = 1.0 / det;\n  out[0] = (a11 * b11 - a12 * b10 + a13 * b09) * det;\n  out[1] = (a02 * b10 - a01 * b11 - a03 * b09) * det;\n  out[2] = (a31 * b05 - a32 * b04 + a33 * b03) * det;\n  out[3] = (a22 * b04 - a21 * b05 - a23 * b03) * det;\n  out[4] = (a12 * b08 - a10 * b11 - a13 * b07) * det;\n  out[5] = (a00 * b11 - a02 * b08 + a03 * b07) * det;\n  out[6] = (a32 * b02 - a30 * b05 - a33 * b01) * det;\n  out[7] = (a20 * b05 - a22 * b02 + a23 * b01) * det;\n  out[8] = (a10 * b10 - a11 * b08 + a13 * b06) * det;\n  out[9] = (a01 * b08 - a00 * b10 - a03 * b06) * det;\n  out[10] = (a30 * b04 - a31 * b02 + a33 * b00) * det;\n  out[11] = (a21 * b02 - a20 * b04 - a23 * b00) * det;\n  out[12] = (a11 * b07 - a10 * b09 - a12 * b06) * det;\n  out[13] = (a00 * b09 - a01 * b07 + a02 * b06) * det;\n  out[14] = (a31 * b01 - a30 * b03 - a32 * b00) * det;\n  out[15] = (a20 * b03 - a21 * b01 + a22 * b00) * det;\n  return out;\n}\n\n\nfunction multiply$1(out, a, b) {\n  let a00 = a[0], a01 = a[1], a02 = a[2], a03 = a[3];\n  let a10 = a[4], a11 = a[5], a12 = a[6], a13 = a[7];\n  let a20 = a[8], a21 = a[9], a22 = a[10], a23 = a[11];\n  let a30 = a[12], a31 = a[13], a32 = a[14], a33 = a[15];\n  let b0  = b[0], b1 = b[1], b2 = b[2], b3 = b[3];\n  out[0] = b0*a00 + b1*a10 + b2*a20 + b3*a30;\n  out[1] = b0*a01 + b1*a11 + b2*a21 + b3*a31;\n  out[2] = b0*a02 + b1*a12 + b2*a22 + b3*a32;\n  out[3] = b0*a03 + b1*a13 + b2*a23 + b3*a33;\n  b0 = b[4]; b1 = b[5]; b2 = b[6]; b3 = b[7];\n  out[4] = b0*a00 + b1*a10 + b2*a20 + b3*a30;\n  out[5] = b0*a01 + b1*a11 + b2*a21 + b3*a31;\n  out[6] = b0*a02 + b1*a12 + b2*a22 + b3*a32;\n  out[7] = b0*a03 + b1*a13 + b2*a23 + b3*a33;\n  b0 = b[8]; b1 = b[9]; b2 = b[10]; b3 = b[11];\n  out[8] = b0*a00 + b1*a10 + b2*a20 + b3*a30;\n  out[9] = b0*a01 + b1*a11 + b2*a21 + b3*a31;\n  out[10] = b0*a02 + b1*a12 + b2*a22 + b3*a32;\n  out[11] = b0*a03 + b1*a13 + b2*a23 + b3*a33;\n  b0 = b[12]; b1 = b[13]; b2 = b[14]; b3 = b[15];\n  out[12] = b0*a00 + b1*a10 + b2*a20 + b3*a30;\n  out[13] = b0*a01 + b1*a11 + b2*a21 + b3*a31;\n  out[14] = b0*a02 + b1*a12 + b2*a22 + b3*a32;\n  out[15] = b0*a03 + b1*a13 + b2*a23 + b3*a33;\n  return out;\n}\n\n\n\n\n\n\n\n\n\n\n\n\nfunction fromRotationTranslation(out, q, v) {\n  let x = q[0], y = q[1], z = q[2], w = q[3];\n  let x2 = x + x;\n  let y2 = y + y;\n  let z2 = z + z;\n  let xx = x * x2;\n  let xy = x * y2;\n  let xz = x * z2;\n  let yy = y * y2;\n  let yz = y * z2;\n  let zz = z * z2;\n  let wx = w * x2;\n  let wy = w * y2;\n  let wz = w * z2;\n  out[0] = 1 - (yy + zz);\n  out[1] = xy + wz;\n  out[2] = xz - wy;\n  out[3] = 0;\n  out[4] = xy - wz;\n  out[5] = 1 - (xx + zz);\n  out[6] = yz + wx;\n  out[7] = 0;\n  out[8] = xz + wy;\n  out[9] = yz - wx;\n  out[10] = 1 - (xx + yy);\n  out[11] = 0;\n  out[12] = v[0];\n  out[13] = v[1];\n  out[14] = v[2];\n  out[15] = 1;\n  return out;\n}\n\nfunction getTranslation(out, mat) {\n  out[0] = mat[12];\n  out[1] = mat[13];\n  out[2] = mat[14];\n  return out;\n}\n\nfunction getRotation(out, mat) {\n  let trace = mat[0] + mat[5] + mat[10];\n  let S = 0;\n  if (trace > 0) {\n    S = Math.sqrt(trace + 1.0) * 2;\n    out[3] = 0.25 * S;\n    out[0] = (mat[6] - mat[9]) / S;\n    out[1] = (mat[8] - mat[2]) / S;\n    out[2] = (mat[1] - mat[4]) / S;\n  } else if ((mat[0] > mat[5]) && (mat[0] > mat[10])) {\n    S = Math.sqrt(1.0 + mat[0] - mat[5] - mat[10]) * 2;\n    out[3] = (mat[6] - mat[9]) / S;\n    out[0] = 0.25 * S;\n    out[1] = (mat[1] + mat[4]) / S;\n    out[2] = (mat[8] + mat[2]) / S;\n  } else if (mat[5] > mat[10]) {\n    S = Math.sqrt(1.0 + mat[5] - mat[0] - mat[10]) * 2;\n    out[3] = (mat[8] - mat[2]) / S;\n    out[0] = (mat[1] + mat[4]) / S;\n    out[1] = 0.25 * S;\n    out[2] = (mat[6] + mat[9]) / S;\n  } else {\n    S = Math.sqrt(1.0 + mat[10] - mat[0] - mat[5]) * 2;\n    out[3] = (mat[1] - mat[4]) / S;\n    out[0] = (mat[8] + mat[2]) / S;\n    out[1] = (mat[6] + mat[9]) / S;\n    out[2] = 0.25 * S;\n  }\n  return out;\n}\n\n\n\n\nfunction perspective(out, fovy, aspect, near, far) {\n  let f = 1.0 / Math.tan(fovy / 2), nf;\n  out[0] = f / aspect;\n  out[1] = 0;\n  out[2] = 0;\n  out[3] = 0;\n  out[4] = 0;\n  out[5] = f;\n  out[6] = 0;\n  out[7] = 0;\n  out[8] = 0;\n  out[9] = 0;\n  out[11] = -1;\n  out[12] = 0;\n  out[13] = 0;\n  out[15] = 0;\n  if (far != null && far !== Infinity) {\n    nf = 1 / (near - far);\n    out[10] = (far + near) * nf;\n    out[14] = (2 * far * near) * nf;\n  } else {\n    out[10] = -1;\n    out[14] = -2 * near;\n  }\n  return out;\n}\n\nfunction create$1() {\n  let out = new ARRAY_TYPE(3);\n  if(ARRAY_TYPE != Float32Array) {\n    out[0] = 0;\n    out[1] = 0;\n    out[2] = 0;\n  }\n  return out;\n}\nfunction clone$1(a) {\n  var out = new ARRAY_TYPE(3);\n  out[0] = a[0];\n  out[1] = a[1];\n  out[2] = a[2];\n  return out;\n}\nfunction length(a) {\n  let x = a[0];\n  let y = a[1];\n  let z = a[2];\n  return Math.sqrt(x*x + y*y + z*z);\n}\nfunction fromValues$1(x, y, z) {\n  let out = new ARRAY_TYPE(3);\n  out[0] = x;\n  out[1] = y;\n  out[2] = z;\n  return out;\n}\nfunction copy$1(out, a) {\n  out[0] = a[0];\n  out[1] = a[1];\n  out[2] = a[2];\n  return out;\n}\n\nfunction add$1(out, a, b) {\n  out[0] = a[0] + b[0];\n  out[1] = a[1] + b[1];\n  out[2] = a[2] + b[2];\n  return out;\n}\n\n\n\n\n\n\n\n\nfunction scale$1(out, a, b) {\n  out[0] = a[0] * b;\n  out[1] = a[1] * b;\n  out[2] = a[2] * b;\n  return out;\n}\n\n\n\n\n\n\nfunction normalize(out, a) {\n  let x = a[0];\n  let y = a[1];\n  let z = a[2];\n  let len = x*x + y*y + z*z;\n  if (len > 0) {\n    len = 1 / Math.sqrt(len);\n    out[0] = a[0] * len;\n    out[1] = a[1] * len;\n    out[2] = a[2] * len;\n  }\n  return out;\n}\nfunction dot(a, b) {\n  return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];\n}\nfunction cross(out, a, b) {\n  let ax = a[0], ay = a[1], az = a[2];\n  let bx = b[0], by = b[1], bz = b[2];\n  out[0] = ay * bz - az * by;\n  out[1] = az * bx - ax * bz;\n  out[2] = ax * by - ay * bx;\n  return out;\n}\n\n\n\n\n\n\nfunction transformQuat(out, a, q) {\n    let qx = q[0], qy = q[1], qz = q[2], qw = q[3];\n    let x = a[0], y = a[1], z = a[2];\n    let uvx = qy * z - qz * y,\n        uvy = qz * x - qx * z,\n        uvz = qx * y - qy * x;\n    let uuvx = qy * uvz - qz * uvy,\n        uuvy = qz * uvx - qx * uvz,\n        uuvz = qx * uvy - qy * uvx;\n    let w2 = qw * 2;\n    uvx *= w2;\n    uvy *= w2;\n    uvz *= w2;\n    uuvx *= 2;\n    uuvy *= 2;\n    uuvz *= 2;\n    out[0] = x + uvx + uuvx;\n    out[1] = y + uvy + uuvy;\n    out[2] = z + uvz + uuvz;\n    return out;\n}\n\n\n\nfunction angle(a, b) {\n  let tempA = fromValues$1(a[0], a[1], a[2]);\n  let tempB = fromValues$1(b[0], b[1], b[2]);\n  normalize(tempA, tempA);\n  normalize(tempB, tempB);\n  let cosine = dot(tempA, tempB);\n  if(cosine > 1.0) {\n    return 0;\n  }\n  else if(cosine < -1.0) {\n    return Math.PI;\n  } else {\n    return Math.acos(cosine);\n  }\n}\n\n\n\n\n\n\n\n\nconst len = length;\n\nconst forEach = (function() {\n  let vec = create$1();\n  return function(a, stride, offset, count, fn, arg) {\n    let i, l;\n    if(!stride) {\n      stride = 3;\n    }\n    if(!offset) {\n      offset = 0;\n    }\n    if(count) {\n      l = Math.min((count * stride) + offset, a.length);\n    } else {\n      l = a.length;\n    }\n    for(i = offset; i < l; i += stride) {\n      vec[0] = a[i]; vec[1] = a[i+1]; vec[2] = a[i+2];\n      fn(vec, vec, arg);\n      a[i] = vec[0]; a[i+1] = vec[1]; a[i+2] = vec[2];\n    }\n    return a;\n  };\n})();\n\nfunction create$2() {\n  let out = new ARRAY_TYPE(9);\n  if(ARRAY_TYPE != Float32Array) {\n    out[1] = 0;\n    out[2] = 0;\n    out[3] = 0;\n    out[5] = 0;\n    out[6] = 0;\n    out[7] = 0;\n  }\n  out[0] = 1;\n  out[4] = 1;\n  out[8] = 1;\n  return out;\n}\n\nfunction create$3() {\n  let out = new ARRAY_TYPE(4);\n  if(ARRAY_TYPE != Float32Array) {\n    out[0] = 0;\n    out[1] = 0;\n    out[2] = 0;\n    out[3] = 0;\n  }\n  return out;\n}\nfunction clone$3(a) {\n  let out = new ARRAY_TYPE(4);\n  out[0] = a[0];\n  out[1] = a[1];\n  out[2] = a[2];\n  out[3] = a[3];\n  return out;\n}\nfunction fromValues$3(x, y, z, w) {\n  let out = new ARRAY_TYPE(4);\n  out[0] = x;\n  out[1] = y;\n  out[2] = z;\n  out[3] = w;\n  return out;\n}\nfunction copy$3(out, a) {\n  out[0] = a[0];\n  out[1] = a[1];\n  out[2] = a[2];\n  out[3] = a[3];\n  return out;\n}\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nfunction normalize$1(out, a) {\n  let x = a[0];\n  let y = a[1];\n  let z = a[2];\n  let w = a[3];\n  let len = x*x + y*y + z*z + w*w;\n  if (len > 0) {\n    len = 1 / Math.sqrt(len);\n    out[0] = x * len;\n    out[1] = y * len;\n    out[2] = z * len;\n    out[3] = w * len;\n  }\n  return out;\n}\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nconst forEach$1 = (function() {\n  let vec = create$3();\n  return function(a, stride, offset, count, fn, arg) {\n    let i, l;\n    if(!stride) {\n      stride = 4;\n    }\n    if(!offset) {\n      offset = 0;\n    }\n    if(count) {\n      l = Math.min((count * stride) + offset, a.length);\n    } else {\n      l = a.length;\n    }\n    for(i = offset; i < l; i += stride) {\n      vec[0] = a[i]; vec[1] = a[i+1]; vec[2] = a[i+2]; vec[3] = a[i+3];\n      fn(vec, vec, arg);\n      a[i] = vec[0]; a[i+1] = vec[1]; a[i+2] = vec[2]; a[i+3] = vec[3];\n    }\n    return a;\n  };\n})();\n\nfunction create$4() {\n  let out = new ARRAY_TYPE(4);\n  if(ARRAY_TYPE != Float32Array) {\n    out[0] = 0;\n    out[1] = 0;\n    out[2] = 0;\n  }\n  out[3] = 1;\n  return out;\n}\n\nfunction setAxisAngle(out, axis, rad) {\n  rad = rad * 0.5;\n  let s = Math.sin(rad);\n  out[0] = s * axis[0];\n  out[1] = s * axis[1];\n  out[2] = s * axis[2];\n  out[3] = Math.cos(rad);\n  return out;\n}\n\nfunction multiply$4(out, a, b) {\n  let ax = a[0], ay = a[1], az = a[2], aw = a[3];\n  let bx = b[0], by = b[1], bz = b[2], bw = b[3];\n  out[0] = ax * bw + aw * bx + ay * bz - az * by;\n  out[1] = ay * bw + aw * by + az * bx - ax * bz;\n  out[2] = az * bw + aw * bz + ax * by - ay * bx;\n  out[3] = aw * bw - ax * bx - ay * by - az * bz;\n  return out;\n}\n\n\n\n\nfunction slerp(out, a, b, t) {\n  let ax = a[0], ay = a[1], az = a[2], aw = a[3];\n  let bx = b[0], by = b[1], bz = b[2], bw = b[3];\n  let omega, cosom, sinom, scale0, scale1;\n  cosom = ax * bx + ay * by + az * bz + aw * bw;\n  if ( cosom < 0.0 ) {\n    cosom = -cosom;\n    bx = - bx;\n    by = - by;\n    bz = - bz;\n    bw = - bw;\n  }\n  if ( (1.0 - cosom) > EPSILON$1 ) {\n    omega  = Math.acos(cosom);\n    sinom  = Math.sin(omega);\n    scale0 = Math.sin((1.0 - t) * omega) / sinom;\n    scale1 = Math.sin(t * omega) / sinom;\n  } else {\n    scale0 = 1.0 - t;\n    scale1 = t;\n  }\n  out[0] = scale0 * ax + scale1 * bx;\n  out[1] = scale0 * ay + scale1 * by;\n  out[2] = scale0 * az + scale1 * bz;\n  out[3] = scale0 * aw + scale1 * bw;\n  return out;\n}\n\nfunction invert$2(out, a) {\n  let a0 = a[0], a1 = a[1], a2 = a[2], a3 = a[3];\n  let dot$$1 = a0*a0 + a1*a1 + a2*a2 + a3*a3;\n  let invDot = dot$$1 ? 1.0/dot$$1 : 0;\n  out[0] = -a0*invDot;\n  out[1] = -a1*invDot;\n  out[2] = -a2*invDot;\n  out[3] = a3*invDot;\n  return out;\n}\n\nfunction fromMat3(out, m) {\n  let fTrace = m[0] + m[4] + m[8];\n  let fRoot;\n  if ( fTrace > 0.0 ) {\n    fRoot = Math.sqrt(fTrace + 1.0);\n    out[3] = 0.5 * fRoot;\n    fRoot = 0.5/fRoot;\n    out[0] = (m[5]-m[7])*fRoot;\n    out[1] = (m[6]-m[2])*fRoot;\n    out[2] = (m[1]-m[3])*fRoot;\n  } else {\n    let i = 0;\n    if ( m[4] > m[0] )\n      i = 1;\n    if ( m[8] > m[i*3+i] )\n      i = 2;\n    let j = (i+1)%3;\n    let k = (i+2)%3;\n    fRoot = Math.sqrt(m[i*3+i]-m[j*3+j]-m[k*3+k] + 1.0);\n    out[i] = 0.5 * fRoot;\n    fRoot = 0.5 / fRoot;\n    out[3] = (m[j*3+k] - m[k*3+j]) * fRoot;\n    out[j] = (m[j*3+i] + m[i*3+j]) * fRoot;\n    out[k] = (m[k*3+i] + m[i*3+k]) * fRoot;\n  }\n  return out;\n}\nfunction fromEuler(out, x, y, z) {\n    let halfToRad = 0.5 * Math.PI / 180.0;\n    x *= halfToRad;\n    y *= halfToRad;\n    z *= halfToRad;\n    let sx = Math.sin(x);\n    let cx = Math.cos(x);\n    let sy = Math.sin(y);\n    let cy = Math.cos(y);\n    let sz = Math.sin(z);\n    let cz = Math.cos(z);\n    out[0] = sx * cy * cz - cx * sy * sz;\n    out[1] = cx * sy * cz + sx * cy * sz;\n    out[2] = cx * cy * sz - sx * sy * cz;\n    out[3] = cx * cy * cz + sx * sy * sz;\n    return out;\n}\n\nconst clone$4 = clone$3;\nconst fromValues$4 = fromValues$3;\nconst copy$4 = copy$3;\n\n\n\n\n\n\n\n\n\n\nconst normalize$2 = normalize$1;\n\n\nconst rotationTo = (function() {\n  let tmpvec3 = create$1();\n  let xUnitVec3 = fromValues$1(1,0,0);\n  let yUnitVec3 = fromValues$1(0,1,0);\n  return function(out, a, b) {\n    let dot$$1 = dot(a, b);\n    if (dot$$1 < -0.999999) {\n      cross(tmpvec3, xUnitVec3, a);\n      if (len(tmpvec3) < 0.000001)\n        cross(tmpvec3, yUnitVec3, a);\n      normalize(tmpvec3, tmpvec3);\n      setAxisAngle(out, tmpvec3, Math.PI);\n      return out;\n    } else if (dot$$1 > 0.999999) {\n      out[0] = 0;\n      out[1] = 0;\n      out[2] = 0;\n      out[3] = 1;\n      return out;\n    } else {\n      cross(tmpvec3, a, b);\n      out[0] = tmpvec3[0];\n      out[1] = tmpvec3[1];\n      out[2] = tmpvec3[2];\n      out[3] = 1 + dot$$1;\n      return normalize$2(out, out);\n    }\n  };\n})();\nconst sqlerp = (function () {\n  let temp1 = create$4();\n  let temp2 = create$4();\n  return function (out, a, b, c, d, t) {\n    slerp(temp1, a, d, t);\n    slerp(temp2, b, c, t);\n    slerp(out, temp1, temp2, 2 * t * (1 - t));\n    return out;\n  };\n}());\nconst setAxes = (function() {\n  let matr = create$2();\n  return function(out, view, right, up) {\n    matr[0] = right[0];\n    matr[3] = right[1];\n    matr[6] = right[2];\n    matr[1] = up[0];\n    matr[4] = up[1];\n    matr[7] = up[2];\n    matr[2] = -view[0];\n    matr[5] = -view[1];\n    matr[8] = -view[2];\n    return normalize$2(out, fromMat3(out, matr));\n  };\n})();\n\nconst PRIVATE$1 = Symbol('@@webxr-polyfill/XRRigidTransform');\nclass XRRigidTransform$1 {\n  constructor() {\n    this[PRIVATE$1] = {\n      matrix: null,\n      position: null,\n      orientation: null,\n      inverse: null,\n    };\n    if (arguments.length === 0) {\n      this[PRIVATE$1].matrix = identity(new Float32Array(16));\n    } else if (arguments.length === 1) {\n      if (arguments[0] instanceof Float32Array) {\n        this[PRIVATE$1].matrix = arguments[0];\n      } else {\n        this[PRIVATE$1].position = this._getPoint(arguments[0]);\n        this[PRIVATE$1].orientation = DOMPointReadOnly.fromPoint({\n            x: 0, y: 0, z: 0, w: 1\n        });\n      }\n    } else if (arguments.length === 2) {\n      this[PRIVATE$1].position = this._getPoint(arguments[0]);\n      this[PRIVATE$1].orientation = this._getPoint(arguments[1]);\n    } else {\n      throw new Error(\"Too many arguments!\");\n    }\n    if (this[PRIVATE$1].matrix) {\n        let position = create$1();\n        getTranslation(position, this[PRIVATE$1].matrix);\n        this[PRIVATE$1].position = DOMPointReadOnly.fromPoint({\n            x: position[0],\n            y: position[1],\n            z: position[2]\n        });\n        let orientation = create$4();\n        getRotation(orientation, this[PRIVATE$1].matrix);\n        this[PRIVATE$1].orientation = DOMPointReadOnly.fromPoint({\n          x: orientation[0],\n          y: orientation[1],\n          z: orientation[2],\n          w: orientation[3]\n        });\n    } else {\n        this[PRIVATE$1].matrix = identity(new Float32Array(16));\n        fromRotationTranslation(\n          this[PRIVATE$1].matrix,\n          fromValues$4(\n            this[PRIVATE$1].orientation.x,\n            this[PRIVATE$1].orientation.y,\n            this[PRIVATE$1].orientation.z,\n            this[PRIVATE$1].orientation.w),\n          fromValues$1(\n            this[PRIVATE$1].position.x,\n            this[PRIVATE$1].position.y,\n            this[PRIVATE$1].position.z)\n        );\n    }\n  }\n  _getPoint(arg) {\n    if (arg instanceof DOMPointReadOnly) {\n      return arg;\n    }\n    return DOMPointReadOnly.fromPoint(arg);\n  }\n  get matrix() { return this[PRIVATE$1].matrix; }\n  get position() { return this[PRIVATE$1].position; }\n  get orientation() { return this[PRIVATE$1].orientation; }\n  get inverse() {\n    if (this[PRIVATE$1].inverse === null) {\n      let invMatrix = identity(new Float32Array(16));\n      invert(invMatrix, this[PRIVATE$1].matrix);\n      this[PRIVATE$1].inverse = new XRRigidTransform$1(invMatrix);\n      this[PRIVATE$1].inverse[PRIVATE$1].inverse = this;\n    }\n    return this[PRIVATE$1].inverse;\n  }\n}\n\nconst PRIVATE$2 = Symbol('@@webxr-polyfill/XRSpace');\n\nclass XRSpace {\n  constructor(specialType = null, inputSource = null) {\n    this[PRIVATE$2] = {\n      specialType,\n      inputSource,\n      baseMatrix: null,\n      inverseBaseMatrix: null,\n      lastFrameId: -1\n    };\n  }\n  get _specialType() {\n    return this[PRIVATE$2].specialType;\n  }\n  get _inputSource() {\n    return this[PRIVATE$2].inputSource;\n  }\n  _ensurePoseUpdated(device, frameId) {\n    if (frameId == this[PRIVATE$2].lastFrameId) return;\n    this[PRIVATE$2].lastFrameId = frameId;\n    this._onPoseUpdate(device);\n  }\n  _onPoseUpdate(device) {\n    if (this[PRIVATE$2].specialType == 'viewer') {\n      this._baseMatrix = device.getBasePoseMatrix();\n    }\n  }\n  set _baseMatrix(matrix) {\n    this[PRIVATE$2].baseMatrix = matrix;\n    this[PRIVATE$2].inverseBaseMatrix = null;\n  }\n  get _baseMatrix() {\n    if (!this[PRIVATE$2].baseMatrix) {\n      if (this[PRIVATE$2].inverseBaseMatrix) {\n        this[PRIVATE$2].baseMatrix = new Float32Array(16);\n        invert(this[PRIVATE$2].baseMatrix, this[PRIVATE$2].inverseBaseMatrix);\n      }\n    }\n    return this[PRIVATE$2].baseMatrix;\n  }\n  set _inverseBaseMatrix(matrix) {\n    this[PRIVATE$2].inverseBaseMatrix = matrix;\n    this[PRIVATE$2].baseMatrix = null;\n  }\n  get _inverseBaseMatrix() {\n    if (!this[PRIVATE$2].inverseBaseMatrix) {\n      if (this[PRIVATE$2].baseMatrix) {\n        this[PRIVATE$2].inverseBaseMatrix = new Float32Array(16);\n        invert(this[PRIVATE$2].inverseBaseMatrix, this[PRIVATE$2].baseMatrix);\n      }\n    }\n    return this[PRIVATE$2].inverseBaseMatrix;\n  }\n  _getSpaceRelativeTransform(space) {\n    if (!this._inverseBaseMatrix || !space._baseMatrix) {\n      return null;\n    }\n    let out = new Float32Array(16);\n    multiply$1(out, this._inverseBaseMatrix, space._baseMatrix);\n    return new XRRigidTransform$1(out);\n  }\n}\n\nconst DEFAULT_EMULATION_HEIGHT = 1.6;\nconst PRIVATE$3 = Symbol('@@webxr-polyfill/XRReferenceSpace');\nconst XRReferenceSpaceTypes = [\n  'viewer',\n  'local',\n  'local-floor',\n  'bounded-floor',\n  'unbounded'\n];\nfunction isFloor(type) {\n  return type === 'bounded-floor' || type === 'local-floor';\n}\nclass XRReferenceSpace extends XRSpace {\n  constructor(type, transform = null) {\n    if (!XRReferenceSpaceTypes.includes(type)) {\n      throw new Error(`XRReferenceSpaceType must be one of ${XRReferenceSpaceTypes}`);\n    }\n    super(type);\n    if (type === 'bounded-floor' && !transform) {\n      throw new Error(`XRReferenceSpace cannot use 'bounded-floor' type if the platform does not provide the floor level`);\n    }\n    if (isFloor(type) && !transform) {\n      transform = identity(new Float32Array(16));\n      transform[13] = DEFAULT_EMULATION_HEIGHT;\n    }\n    this._inverseBaseMatrix = transform || identity(new Float32Array(16));\n    this[PRIVATE$3] = {\n      type,\n      transform,\n      originOffset : identity(new Float32Array(16)),\n    };\n  }\n  _transformBasePoseMatrix(out, pose) {\n    multiply$1(out, this._inverseBaseMatrix, pose);\n  }\n  _originOffsetMatrix() {\n    return this[PRIVATE$3].originOffset;\n  }\n  _adjustForOriginOffset(transformMatrix) {\n    let inverseOriginOffsetMatrix = new Float32Array(16);\n    invert(inverseOriginOffsetMatrix, this[PRIVATE$3].originOffset);\n    multiply$1(transformMatrix, inverseOriginOffsetMatrix, transformMatrix);\n  }\n  _getSpaceRelativeTransform(space) {\n    let transform = super._getSpaceRelativeTransform(space);\n    this._adjustForOriginOffset(transform.matrix);\n    return new XRRigidTransform(transform.matrix);\n  }\n  getOffsetReferenceSpace(additionalOffset) {\n    let newSpace = new XRReferenceSpace(\n      this[PRIVATE$3].type,\n      this[PRIVATE$3].transform,\n      this[PRIVATE$3].bounds);\n    multiply$1(newSpace[PRIVATE$3].originOffset, this[PRIVATE$3].originOffset, additionalOffset.matrix);\n    return newSpace;\n  }\n}\n\nconst PRIVATE$4 = Symbol('@@webxr-polyfill/XR');\nconst XRSessionModes = ['inline', 'immersive-vr', 'immersive-ar'];\nconst DEFAULT_SESSION_OPTIONS = {\n  'inline': {\n    requiredFeatures: ['viewer'],\n    optionalFeatures: [],\n  },\n  'immersive-vr': {\n    requiredFeatures: ['viewer', 'local'],\n    optionalFeatures: [],\n  },\n  'immersive-ar': {\n    requiredFeatures: ['viewer', 'local'],\n    optionalFeatures: [],\n  }\n};\nconst POLYFILL_REQUEST_SESSION_ERROR =\n`Polyfill Error: Must call navigator.xr.isSessionSupported() with any XRSessionMode\nor navigator.xr.requestSession('inline') prior to requesting an immersive\nsession. This is a limitation specific to the WebXR Polyfill and does not apply\nto native implementations of the API.`;\nclass XRSystem extends EventTarget {\n  constructor(devicePromise) {\n    super();\n    this[PRIVATE$4] = {\n      device: null,\n      devicePromise,\n      immersiveSession: null,\n      inlineSessions: new Set(),\n    };\n    devicePromise.then((device) => { this[PRIVATE$4].device = device; });\n  }\n  async isSessionSupported(mode) {\n    if (!this[PRIVATE$4].device) {\n      await this[PRIVATE$4].devicePromise;\n    }\n    if (mode != 'inline') {\n      return Promise.resolve(this[PRIVATE$4].device.isSessionSupported(mode));\n    }\n    return Promise.resolve(true);\n  }\n  async requestSession(mode, options) {\n    if (!this[PRIVATE$4].device) {\n      if (mode != 'inline') {\n        throw new Error(POLYFILL_REQUEST_SESSION_ERROR);\n      } else {\n        await this[PRIVATE$4].devicePromise;\n      }\n    }\n    if (!XRSessionModes.includes(mode)) {\n      throw new TypeError(\n          `The provided value '${mode}' is not a valid enum value of type XRSessionMode`);\n    }\n    const defaultOptions = DEFAULT_SESSION_OPTIONS[mode];\n    const requiredFeatures = defaultOptions.requiredFeatures.concat(\n        options && options.requiredFeatures ? options.requiredFeatures : []);\n    const optionalFeatures = defaultOptions.optionalFeatures.concat(\n        options && options.optionalFeatures ? options.optionalFeatures : []);\n    const enabledFeatures = new Set();\n    let requirementsFailed = false;\n    for (let feature of requiredFeatures) {\n      if (!this[PRIVATE$4].device.isFeatureSupported(feature)) {\n        console.error(`The required feature '${feature}' is not supported`);\n        requirementsFailed = true;\n      } else {\n        enabledFeatures.add(feature);\n      }\n    }\n    if (requirementsFailed) {\n      throw new DOMException('Session does not support some required features', 'NotSupportedError');\n    }\n    for (let feature of optionalFeatures) {\n      if (!this[PRIVATE$4].device.isFeatureSupported(feature)) {\n        console.log(`The optional feature '${feature}' is not supported`);\n      } else {\n        enabledFeatures.add(feature);\n      }\n    }\n    const sessionId = await this[PRIVATE$4].device.requestSession(mode, enabledFeatures);\n    const session = new XRSession(this[PRIVATE$4].device, mode, sessionId);\n    if (mode == 'inline') {\n      this[PRIVATE$4].inlineSessions.add(session);\n    } else {\n      this[PRIVATE$4].immersiveSession = session;\n    }\n    const onSessionEnd = () => {\n      if (mode == 'inline') {\n        this[PRIVATE$4].inlineSessions.delete(session);\n      } else {\n        this[PRIVATE$4].immersiveSession = null;\n      }\n      session.removeEventListener('end', onSessionEnd);\n    };\n    session.addEventListener('end', onSessionEnd);\n    return session;\n  }\n}\n\nlet now;\nif ('performance' in _global$1 === false) {\n  let startTime = Date.now();\n  now = () => Date.now() - startTime;\n} else {\n  now = () => performance.now();\n}\nvar now$1 = now;\n\nconst PRIVATE$5 = Symbol('@@webxr-polyfill/XRPose');\nclass XRPose$1 {\n  constructor(transform, emulatedPosition) {\n    this[PRIVATE$5] = {\n      transform,\n      emulatedPosition,\n    };\n  }\n  get transform() { return this[PRIVATE$5].transform; }\n  get emulatedPosition() { return this[PRIVATE$5].emulatedPosition; }\n}\n\nconst PRIVATE$6 = Symbol('@@webxr-polyfill/XRViewerPose');\nclass XRViewerPose extends XRPose$1 {\n  constructor(transform, views, emulatedPosition = false) {\n    super(transform, emulatedPosition);\n    this[PRIVATE$6] = {\n      views\n    };\n  }\n  get views() {\n    return this[PRIVATE$6].views;\n  }\n}\n\nconst PRIVATE$7 = Symbol('@@webxr-polyfill/XRViewport');\nclass XRViewport {\n  constructor(target) {\n    this[PRIVATE$7] = { target };\n  }\n  get x() { return this[PRIVATE$7].target.x; }\n  get y() { return this[PRIVATE$7].target.y; }\n  get width() { return this[PRIVATE$7].target.width; }\n  get height() { return this[PRIVATE$7].target.height; }\n}\n\nconst XREyes = ['left', 'right', 'none'];\nconst PRIVATE$8 = Symbol('@@webxr-polyfill/XRView');\nclass XRView {\n  constructor(device, transform, eye, sessionId) {\n    if (!XREyes.includes(eye)) {\n      throw new Error(`XREye must be one of: ${XREyes}`);\n    }\n    const temp = Object.create(null);\n    const viewport = new XRViewport(temp);\n    this[PRIVATE$8] = {\n      device,\n      eye,\n      viewport,\n      temp,\n      sessionId,\n      transform,\n    };\n  }\n  get eye() { return this[PRIVATE$8].eye; }\n  get projectionMatrix() { return this[PRIVATE$8].device.getProjectionMatrix(this.eye); }\n  get transform() { return this[PRIVATE$8].transform; }\n  _getViewport(layer) {\n    if (this[PRIVATE$8].device.getViewport(this[PRIVATE$8].sessionId,\n                                           this.eye,\n                                           layer,\n                                           this[PRIVATE$8].temp)) {\n      return this[PRIVATE$8].viewport;\n    }\n    return undefined;\n  }\n}\n\nconst PRIVATE$9 = Symbol('@@webxr-polyfill/XRFrame');\nconst NON_ACTIVE_MSG = \"XRFrame access outside the callback that produced it is invalid.\";\nconst NON_ANIMFRAME_MSG = \"getViewerPose can only be called on XRFrame objects passed to XRSession.requestAnimationFrame callbacks.\";\nlet NEXT_FRAME_ID = 0;\nclass XRFrame {\n  constructor(device, session, sessionId) {\n    this[PRIVATE$9] = {\n      id: ++NEXT_FRAME_ID,\n      active: false,\n      animationFrame: false,\n      device,\n      session,\n      sessionId\n    };\n  }\n  get session() { return this[PRIVATE$9].session; }\n  getViewerPose(referenceSpace) {\n    if (!this[PRIVATE$9].animationFrame) {\n      throw new DOMException(NON_ANIMFRAME_MSG, 'InvalidStateError');\n    }\n    if (!this[PRIVATE$9].active) {\n      throw new DOMException(NON_ACTIVE_MSG, 'InvalidStateError');\n    }\n    const device = this[PRIVATE$9].device;\n    const session = this[PRIVATE$9].session;\n    session[PRIVATE$15].viewerSpace._ensurePoseUpdated(device, this[PRIVATE$9].id);\n    referenceSpace._ensurePoseUpdated(device, this[PRIVATE$9].id);\n    let viewerTransform = referenceSpace._getSpaceRelativeTransform(session[PRIVATE$15].viewerSpace);\n    const views = [];\n    for (let viewSpace of session[PRIVATE$15].viewSpaces) {\n      viewSpace._ensurePoseUpdated(device, this[PRIVATE$9].id);\n      let viewTransform = referenceSpace._getSpaceRelativeTransform(viewSpace);\n      let view = new XRView(device, viewTransform, viewSpace.eye, this[PRIVATE$9].sessionId);\n      views.push(view);\n    }\n    let viewerPose = new XRViewerPose(viewerTransform, views, false                             );\n    return viewerPose;\n  }\n  getPose(space, baseSpace) {\n    if (!this[PRIVATE$9].active) {\n      throw new DOMException(NON_ACTIVE_MSG, 'InvalidStateError');\n    }\n    const device = this[PRIVATE$9].device;\n    if (space._specialType === \"target-ray\" || space._specialType === \"grip\") {\n      return device.getInputPose(\n        space._inputSource, baseSpace, space._specialType);\n    } else {\n      space._ensurePoseUpdated(device, this[PRIVATE$9].id);\n      baseSpace._ensurePoseUpdated(device, this[PRIVATE$9].id);\n      let transform = baseSpace._getSpaceRelativeTransform(space);\n      if (!transform) { return null; }\n      return new XRPose(transform, false                             );\n    }\n  }\n}\n\nconst PRIVATE$10 = Symbol('@@webxr-polyfill/XRRenderState');\nconst XRRenderStateInit = Object.freeze({\n  depthNear: 0.1,\n  depthFar: 1000.0,\n  inlineVerticalFieldOfView: null,\n  baseLayer: null\n});\nclass XRRenderState {\n  constructor(stateInit = {}) {\n    const config = Object.assign({}, XRRenderStateInit, stateInit);\n    this[PRIVATE$10] = { config };\n  }\n  get depthNear() { return this[PRIVATE$10].config.depthNear; }\n  get depthFar() { return this[PRIVATE$10].config.depthFar; }\n  get inlineVerticalFieldOfView() { return this[PRIVATE$10].config.inlineVerticalFieldOfView; }\n  get baseLayer() { return this[PRIVATE$10].config.baseLayer; }\n}\n\nconst POLYFILLED_XR_COMPATIBLE = Symbol('@@webxr-polyfill/polyfilled-xr-compatible');\nconst XR_COMPATIBLE = Symbol('@@webxr-polyfill/xr-compatible');\n\nconst PRIVATE$11 = Symbol('@@webxr-polyfill/XRWebGLLayer');\nconst XRWebGLLayerInit = Object.freeze({\n  antialias: true,\n  depth: false,\n  stencil: false,\n  alpha: true,\n  multiview: false,\n  ignoreDepthValues: false,\n  framebufferScaleFactor: 1.0,\n});\nclass XRWebGLLayer$1 {\n  constructor(session, context, layerInit={}) {\n    const config = Object.assign({}, XRWebGLLayerInit, layerInit);\n    if (!(session instanceof XRSession$1)) {\n      throw new Error('session must be a XRSession');\n    }\n    if (session.ended) {\n      throw new Error(`InvalidStateError`);\n    }\n    if (context[POLYFILLED_XR_COMPATIBLE]) {\n      if (context[XR_COMPATIBLE] !== true) {\n        throw new Error(`InvalidStateError`);\n      }\n    }\n    const framebuffer = context.getParameter(context.FRAMEBUFFER_BINDING);\n    this[PRIVATE$11] = {\n      context,\n      config,\n      framebuffer,\n      session,\n    };\n  }\n  get context() { return this[PRIVATE$11].context; }\n  get antialias() { return this[PRIVATE$11].config.antialias; }\n  get ignoreDepthValues() { return true; }\n  get framebuffer() { return this[PRIVATE$11].framebuffer; }\n  get framebufferWidth() { return this[PRIVATE$11].context.drawingBufferWidth; }\n  get framebufferHeight() { return this[PRIVATE$11].context.drawingBufferHeight; }\n  get _session() { return this[PRIVATE$11].session; }\n  getViewport(view) {\n    return view._getViewport(this);\n  }\n  static getNativeFramebufferScaleFactor(session) {\n    if (!session) {\n      throw new TypeError('getNativeFramebufferScaleFactor must be passed a session.')\n    }\n    if (session[PRIVATE$15].ended) { return 0.0; }\n    return 1.0;\n  }\n}\n\nconst PRIVATE$12 = Symbol('@@webxr-polyfill/XRInputSourceEvent');\nclass XRInputSourceEvent extends Event {\n  constructor(type, eventInitDict) {\n    super(type, eventInitDict);\n    this[PRIVATE$12] = {\n      frame: eventInitDict.frame,\n      inputSource: eventInitDict.inputSource\n    };\n    Object.setPrototypeOf(this, XRInputSourceEvent.prototype);\n  }\n  get frame() { return this[PRIVATE$12].frame; }\n  get inputSource() { return this[PRIVATE$12].inputSource; }\n}\n\nconst PRIVATE$13 = Symbol('@@webxr-polyfill/XRSessionEvent');\nclass XRSessionEvent extends Event {\n  constructor(type, eventInitDict) {\n    super(type, eventInitDict);\n    this[PRIVATE$13] = {\n      session: eventInitDict.session\n    };\n    Object.setPrototypeOf(this, XRSessionEvent.prototype);\n  }\n  get session() { return this[PRIVATE$13].session; }\n}\n\nconst PRIVATE$14 = Symbol('@@webxr-polyfill/XRInputSourcesChangeEvent');\nclass XRInputSourcesChangeEvent extends Event {\n  constructor(type, eventInitDict) {\n    super(type, eventInitDict);\n    this[PRIVATE$14] = {\n      session: eventInitDict.session,\n      added: eventInitDict.added,\n      removed: eventInitDict.removed\n    };\n    Object.setPrototypeOf(this, XRInputSourcesChangeEvent.prototype);\n  }\n  get session() { return this[PRIVATE$14].session; }\n  get added() { return this[PRIVATE$14].added; }\n  get removed() { return this[PRIVATE$14].removed; }\n}\n\nconst PRIVATE$15 = Symbol('@@webxr-polyfill/XRSession');\nclass XRViewSpace extends XRSpace {\n  constructor(eye) {\n    super(eye);\n  }\n  get eye() {\n    return this._specialType;\n  }\n  _onPoseUpdate(device) {\n    this._inverseBaseMatrix = device.getBaseViewMatrix(this._specialType);\n  }\n}\nclass XRSession$1 extends EventTarget {\n  constructor(device, mode, id) {\n    super();\n    let immersive = mode != 'inline';\n    let initialRenderState = new XRRenderState({\n      inlineVerticalFieldOfView: immersive ? null : Math.PI * 0.5\n    });\n    this[PRIVATE$15] = {\n      device,\n      mode,\n      immersive,\n      ended: false,\n      suspended: false,\n      frameCallbacks: [],\n      currentFrameCallbacks: null,\n      frameHandle: 0,\n      deviceFrameHandle: null,\n      id,\n      activeRenderState: initialRenderState,\n      pendingRenderState: null,\n      viewerSpace: new XRReferenceSpace(\"viewer\"),\n      viewSpaces: [],\n      currentInputSources: []\n    };\n    if (immersive) {\n      this[PRIVATE$15].viewSpaces.push(new XRViewSpace('left'),\n                                    new XRViewSpace('right'));\n    } else {\n      this[PRIVATE$15].viewSpaces.push(new XRViewSpace('none'));\n    }\n    this[PRIVATE$15].onDeviceFrame = () => {\n      if (this[PRIVATE$15].ended || this[PRIVATE$15].suspended) {\n        return;\n      }\n      this[PRIVATE$15].deviceFrameHandle = null;\n      this[PRIVATE$15].startDeviceFrameLoop();\n      if (this[PRIVATE$15].pendingRenderState !== null) {\n        this[PRIVATE$15].activeRenderState = new XRRenderState(this[PRIVATE$15].pendingRenderState);\n        this[PRIVATE$15].pendingRenderState = null;\n        if (this[PRIVATE$15].activeRenderState.baseLayer) {\n          this[PRIVATE$15].device.onBaseLayerSet(\n            this[PRIVATE$15].id,\n            this[PRIVATE$15].activeRenderState.baseLayer);\n        }\n      }\n      if (this[PRIVATE$15].activeRenderState.baseLayer === null) {\n        return;\n      }\n      const frame = new XRFrame(device, this, this[PRIVATE$15].id);\n      const callbacks = this[PRIVATE$15].currentFrameCallbacks = this[PRIVATE$15].frameCallbacks;\n      this[PRIVATE$15].frameCallbacks = [];\n      frame[PRIVATE$9].active = true;\n      frame[PRIVATE$9].animationFrame = true;\n      this[PRIVATE$15].device.onFrameStart(this[PRIVATE$15].id, this[PRIVATE$15].activeRenderState);\n      this._checkInputSourcesChange();\n      const rightNow = now$1();\n      for (let i = 0; i < callbacks.length; i++) {\n        try {\n          if (!callbacks[i].cancelled && typeof callbacks[i].callback === 'function') {\n            callbacks[i].callback(rightNow, frame);\n          }\n        } catch(err) {\n          console.error(err);\n        }\n      }\n      this[PRIVATE$15].currentFrameCallbacks = null;\n      frame[PRIVATE$9].active = false;\n      this[PRIVATE$15].device.onFrameEnd(this[PRIVATE$15].id);\n    };\n    this[PRIVATE$15].startDeviceFrameLoop = () => {\n      if (this[PRIVATE$15].deviceFrameHandle === null) {\n        this[PRIVATE$15].deviceFrameHandle = this[PRIVATE$15].device.requestAnimationFrame(\n          this[PRIVATE$15].onDeviceFrame\n        );\n      }\n    };\n    this[PRIVATE$15].stopDeviceFrameLoop = () => {\n      const handle = this[PRIVATE$15].deviceFrameHandle;\n      if (handle !== null) {\n        this[PRIVATE$15].device.cancelAnimationFrame(handle);\n        this[PRIVATE$15].deviceFrameHandle = null;\n      }\n    };\n    this[PRIVATE$15].onPresentationEnd = sessionId => {\n      if (sessionId !== this[PRIVATE$15].id) {\n        this[PRIVATE$15].suspended = false;\n        this[PRIVATE$15].startDeviceFrameLoop();\n        this.dispatchEvent('focus', { session: this });\n        return;\n      }\n      this[PRIVATE$15].ended = true;\n      this[PRIVATE$15].stopDeviceFrameLoop();\n      device.removeEventListener('@@webxr-polyfill/vr-present-end', this[PRIVATE$15].onPresentationEnd);\n      device.removeEventListener('@@webxr-polyfill/vr-present-start', this[PRIVATE$15].onPresentationStart);\n      device.removeEventListener('@@webxr-polyfill/input-select-start', this[PRIVATE$15].onSelectStart);\n      device.removeEventListener('@@webxr-polyfill/input-select-end', this[PRIVATE$15].onSelectEnd);\n      this.dispatchEvent('end', new XRSessionEvent('end', { session: this }));\n    };\n    device.addEventListener('@@webxr-polyfill/vr-present-end', this[PRIVATE$15].onPresentationEnd);\n    this[PRIVATE$15].onPresentationStart = sessionId => {\n      if (sessionId === this[PRIVATE$15].id) {\n        return;\n      }\n      this[PRIVATE$15].suspended = true;\n      this[PRIVATE$15].stopDeviceFrameLoop();\n      this.dispatchEvent('blur', { session: this });\n    };\n    device.addEventListener('@@webxr-polyfill/vr-present-start', this[PRIVATE$15].onPresentationStart);\n    this[PRIVATE$15].onSelectStart = evt => {\n      if (evt.sessionId !== this[PRIVATE$15].id) {\n        return;\n      }\n      this[PRIVATE$15].dispatchInputSourceEvent('selectstart',  evt.inputSource);\n    };\n    device.addEventListener('@@webxr-polyfill/input-select-start', this[PRIVATE$15].onSelectStart);\n    this[PRIVATE$15].onSelectEnd = evt => {\n      if (evt.sessionId !== this[PRIVATE$15].id) {\n        return;\n      }\n      this[PRIVATE$15].dispatchInputSourceEvent('selectend',  evt.inputSource);\n      this[PRIVATE$15].dispatchInputSourceEvent('select',  evt.inputSource);\n    };\n    device.addEventListener('@@webxr-polyfill/input-select-end', this[PRIVATE$15].onSelectEnd);\n    this[PRIVATE$15].onSqueezeStart = evt => {\n      if (evt.sessionId !== this[PRIVATE$15].id) {\n        return;\n      }\n      this[PRIVATE$15].dispatchInputSourceEvent('squeezestart',  evt.inputSource);\n    };\n    device.addEventListener('@@webxr-polyfill/input-squeeze-start', this[PRIVATE$15].onSqueezeStart);\n    this[PRIVATE$15].onSqueezeEnd = evt => {\n      if (evt.sessionId !== this[PRIVATE$15].id) {\n        return;\n      }\n      this[PRIVATE$15].dispatchInputSourceEvent('squeezeend',  evt.inputSource);\n      this[PRIVATE$15].dispatchInputSourceEvent('squeeze',  evt.inputSource);\n    };\n    device.addEventListener('@@webxr-polyfill/input-squeeze-end', this[PRIVATE$15].onSqueezeEnd);\n    this[PRIVATE$15].dispatchInputSourceEvent = (type, inputSource) => {\n      const frame = new XRFrame(device, this, this[PRIVATE$15].id);\n      const event = new XRInputSourceEvent(type, { frame, inputSource });\n      frame[PRIVATE$9].active = true;\n      this.dispatchEvent(type, event);\n      frame[PRIVATE$9].active = false;\n    };\n    this[PRIVATE$15].startDeviceFrameLoop();\n    this.onblur = undefined;\n    this.onfocus = undefined;\n    this.onresetpose = undefined;\n    this.onend = undefined;\n    this.onselect = undefined;\n    this.onselectstart = undefined;\n    this.onselectend = undefined;\n  }\n  get renderState() { return this[PRIVATE$15].activeRenderState; }\n  get environmentBlendMode() {\n    return this[PRIVATE$15].device.environmentBlendMode || 'opaque';\n  }\n  async requestReferenceSpace(type) {\n    if (this[PRIVATE$15].ended) {\n      return;\n    }\n    if (!XRReferenceSpaceTypes.includes(type)) {\n      throw new TypeError(`XRReferenceSpaceType must be one of ${XRReferenceSpaceTypes}`);\n    }\n    if (!this[PRIVATE$15].device.doesSessionSupportReferenceSpace(this[PRIVATE$15].id, type)) {\n      throw new DOMException(`The ${type} reference space is not supported by this session.`, 'NotSupportedError');\n    }\n    if (type === 'viewer') {\n      return this[PRIVATE$15].viewerSpace;\n    }\n    let transform = await this[PRIVATE$15].device.requestFrameOfReferenceTransform(type);\n    if (type === 'bounded-floor') {\n      if (!transform) {\n        throw new DOMException(`${type} XRReferenceSpace not supported by this device.`, 'NotSupportedError');\n      }\n      let bounds = this[PRIVATE$15].device.requestStageBounds();\n      if (!bounds) {\n        throw new DOMException(`${type} XRReferenceSpace not supported by this device.`, 'NotSupportedError');\n      }\n      throw new DOMException(`The WebXR polyfill does not support the ${type} reference space yet.`, 'NotSupportedError');\n    }\n    return new XRReferenceSpace(type, transform);\n  }\n  requestAnimationFrame(callback) {\n    if (this[PRIVATE$15].ended) {\n      return;\n    }\n    const handle = ++this[PRIVATE$15].frameHandle;\n    this[PRIVATE$15].frameCallbacks.push({\n      handle,\n      callback,\n      cancelled: false\n    });\n    return handle;\n  }\n  cancelAnimationFrame(handle) {\n    let callbacks = this[PRIVATE$15].frameCallbacks;\n    let index = callbacks.findIndex(d => d && d.handle === handle);\n    if (index > -1) {\n      callbacks[index].cancelled = true;\n      callbacks.splice(index, 1);\n    }\n    callbacks = this[PRIVATE$15].currentFrameCallbacks;\n    if (callbacks) {\n      index = callbacks.findIndex(d => d && d.handle === handle);\n      if (index > -1) {\n        callbacks[index].cancelled = true;\n      }\n    }\n  }\n  get inputSources() {\n    return this[PRIVATE$15].device.getInputSources();\n  }\n  async end() {\n    if (this[PRIVATE$15].ended) {\n      return;\n    }\n    if (this[PRIVATE$15].immersive) {\n      this[PRIVATE$15].ended = true;\n      this[PRIVATE$15].device.removeEventListener('@@webxr-polyfill/vr-present-start',\n                                                 this[PRIVATE$15].onPresentationStart);\n      this[PRIVATE$15].device.removeEventListener('@@webxr-polyfill/vr-present-end',\n                                                 this[PRIVATE$15].onPresentationEnd);\n      this[PRIVATE$15].device.removeEventListener('@@webxr-polyfill/input-select-start',\n                                                 this[PRIVATE$15].onSelectStart);\n      this[PRIVATE$15].device.removeEventListener('@@webxr-polyfill/input-select-end',\n                                                 this[PRIVATE$15].onSelectEnd);\n      this.dispatchEvent('end', new XRSessionEvent('end', { session: this }));\n    }\n    this[PRIVATE$15].stopDeviceFrameLoop();\n    return this[PRIVATE$15].device.endSession(this[PRIVATE$15].id);\n  }\n  updateRenderState(newState) {\n    if (this[PRIVATE$15].ended) {\n      const message = \"Can't call updateRenderState on an XRSession \" +\n                      \"that has already ended.\";\n      throw new Error(message);\n    }\n    if (newState.baseLayer && (newState.baseLayer._session !== this)) {\n      const message = \"Called updateRenderState with a base layer that was \" +\n                      \"created by a different session.\";\n      throw new Error(message);\n    }\n    const fovSet = (newState.inlineVerticalFieldOfView !== null) &&\n                   (newState.inlineVerticalFieldOfView !== undefined);\n    if (fovSet) {\n      if (this[PRIVATE$15].immersive) {\n        const message = \"inlineVerticalFieldOfView must not be set for an \" +\n                        \"XRRenderState passed to updateRenderState for an \" +\n                        \"immersive session.\";\n        throw new Error(message);\n      } else {\n        newState.inlineVerticalFieldOfView = Math.min(\n          3.13, Math.max(0.01, newState.inlineVerticalFieldOfView));\n      }\n    }\n    if (this[PRIVATE$15].pendingRenderState === null) {\n      const activeRenderState = this[PRIVATE$15].activeRenderState;\n      this[PRIVATE$15].pendingRenderState = {\n        depthNear: activeRenderState.depthNear,\n        depthFar: activeRenderState.depthFar,\n        inlineVerticalFieldOfView: activeRenderState.inlineVerticalFieldOfView,\n        baseLayer: activeRenderState.baseLayer\n      };\n    }\n    Object.assign(this[PRIVATE$15].pendingRenderState, newState);\n  }\n  _checkInputSourcesChange() {\n    const added = [];\n    const removed = [];\n    const newInputSources = this.inputSources;\n    const oldInputSources = this[PRIVATE$15].currentInputSources;\n    for (const newInputSource of newInputSources) {\n      if (!oldInputSources.includes(newInputSource)) {\n        added.push(newInputSource);\n      }\n    }\n    for (const oldInputSource of oldInputSources) {\n      if (!newInputSources.includes(oldInputSource)) {\n        removed.push(oldInputSource);\n      }\n    }\n    if (added.length > 0 || removed.length > 0) {\n      this.dispatchEvent('inputsourceschange', new XRInputSourcesChangeEvent('inputsourceschange', {\n        session: this,\n        added: added,\n        removed: removed\n      }));\n    }\n    this[PRIVATE$15].currentInputSources.length = 0;\n    for (const newInputSource of newInputSources) {\n      this[PRIVATE$15].currentInputSources.push(newInputSource);\n    }\n  }\n}\n\nconst PRIVATE$16 = Symbol('@@webxr-polyfill/XRInputSource');\nclass XRInputSource {\n  constructor(impl) {\n    this[PRIVATE$16] = {\n      impl,\n      gripSpace: new XRSpace(\"grip\", this),\n      targetRaySpace: new XRSpace(\"target-ray\", this)\n    };\n  }\n  get handedness() { return this[PRIVATE$16].impl.handedness; }\n  get targetRayMode() { return this[PRIVATE$16].impl.targetRayMode; }\n  get gripSpace() {\n    let mode = this[PRIVATE$16].impl.targetRayMode;\n    if (mode === \"gaze\" || mode === \"screen\") {\n      return null;\n    }\n    return this[PRIVATE$16].gripSpace;\n  }\n  get targetRaySpace() { return this[PRIVATE$16].targetRaySpace; }\n  get profiles() { return this[PRIVATE$16].impl.profiles; }\n  get gamepad() { return this[PRIVATE$16].impl.gamepad; }\n}\n\nconst PRIVATE$17 = Symbol('@@webxr-polyfill/XRReferenceSpaceEvent');\nclass XRReferenceSpaceEvent extends Event {\n  constructor(type, eventInitDict) {\n    super(type, eventInitDict);\n    this[PRIVATE$17] = {\n      referenceSpace: eventInitDict.referenceSpace,\n      transform: eventInitDict.transform || null\n    };\n    Object.setPrototypeOf(this, XRReferenceSpaceEvent.prototype);\n  }\n  get referenceSpace() { return this[PRIVATE$17].referenceSpace; }\n  get transform() { return this[PRIVATE$17].transform; }\n}\n\nvar API = {\n  XRSystem,\n  XRSession: XRSession$1,\n  XRSessionEvent,\n  XRFrame,\n  XRView,\n  XRViewport,\n  XRViewerPose,\n  XRWebGLLayer: XRWebGLLayer$1,\n  XRSpace,\n  XRReferenceSpace,\n  XRReferenceSpaceEvent,\n  XRInputSource,\n  XRInputSourceEvent,\n  XRInputSourcesChangeEvent,\n  XRRenderState,\n  XRRigidTransform: XRRigidTransform$1,\n  XRPose: XRPose$1,\n};\n\nconst polyfillMakeXRCompatible = Context => {\n  if (typeof Context.prototype.makeXRCompatible === 'function') {\n    return false;\n  }\n  Context.prototype.makeXRCompatible = function () {\n    this[XR_COMPATIBLE] = true;\n    return Promise.resolve();\n  };\n  return true;\n};\nconst polyfillGetContext = (Canvas) => {\n  const getContext = Canvas.prototype.getContext;\n  Canvas.prototype.getContext = function (contextType, glAttribs) {\n    const ctx = getContext.call(this, contextType, glAttribs);\n    if (ctx) {\n      ctx[POLYFILLED_XR_COMPATIBLE] = true;\n      if (glAttribs && ('xrCompatible' in glAttribs)) {\n        ctx[XR_COMPATIBLE] = glAttribs.xrCompatible;\n      }\n    }\n    return ctx;\n  };\n};\n\nconst isImageBitmapSupported = global =>\n  !!(global.ImageBitmapRenderingContext &&\n     global.createImageBitmap);\nconst isMobile = global => {\n  var check = false;\n  (function(a){if(/(android|bb\\d+|meego).+mobile|avantgo|bada\\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\\.(browser|link)|vodafone|wap|windows ce|xda|xiino/i.test(a)||/1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\\-(n|u)|c55\\/|capi|ccwa|cdm\\-|cell|chtm|cldc|cmd\\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\\-s|devi|dica|dmob|do(c|p)o|ds(12|\\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\\-|_)|g1 u|g560|gene|gf\\-5|g\\-mo|go(\\.w|od)|gr(ad|un)|haie|hcit|hd\\-(m|p|t)|hei\\-|hi(pt|ta)|hp( i|ip)|hs\\-c|ht(c(\\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\\-(20|go|ma)|i230|iac( |\\-|\\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\\/)|klon|kpt |kwc\\-|kyo(c|k)|le(no|xi)|lg( g|\\/(k|l|u)|50|54|\\-[a-w])|libw|lynx|m1\\-w|m3ga|m50\\/|ma(te|ui|xo)|mc(01|21|ca)|m\\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\\-2|po(ck|rt|se)|prox|psio|pt\\-g|qa\\-a|qc(07|12|21|32|60|\\-[2-7]|i\\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\\-|oo|p\\-)|sdk\\/|se(c(\\-|0|1)|47|mc|nd|ri)|sgh\\-|shar|sie(\\-|m)|sk\\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\\-|v\\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\\-|tdg\\-|tel(i|m)|tim\\-|t\\-mo|to(pl|sh)|ts(70|m\\-|m3|m5)|tx\\-9|up(\\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\\-|your|zeto|zte\\-/i.test(a.substr(0,4)))check = true;})(global.navigator.userAgent||global.navigator.vendor||global.opera);\n  return check;\n};\nconst applyCanvasStylesForMinimalRendering = canvas => {\n  canvas.style.display = 'block';\n  canvas.style.position = 'absolute';\n  canvas.style.width = canvas.style.height = '1px';\n  canvas.style.top = canvas.style.left = '0px';\n};\n\nvar commonjsGlobal$1 = typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};\n\n\n\nfunction unwrapExports (x) {\n\treturn x && x.__esModule && Object.prototype.hasOwnProperty.call(x, 'default') ? x['default'] : x;\n}\n\nfunction createCommonjsModule$1(fn, module) {\n\treturn module = { exports: {} }, fn(module, module.exports), module.exports;\n}\n\nvar cardboardVrDisplay = createCommonjsModule$1(function (module, exports) {\n(function (global, factory) {\n\tmodule.exports = factory();\n}(commonjsGlobal$1, (function () { var classCallCheck = function (instance, Constructor) {\n  if (!(instance instanceof Constructor)) {\n    throw new TypeError(\"Cannot call a class as a function\");\n  }\n};\nvar createClass = function () {\n  function defineProperties(target, props) {\n    for (var i = 0; i < props.length; i++) {\n      var descriptor = props[i];\n      descriptor.enumerable = descriptor.enumerable || false;\n      descriptor.configurable = true;\n      if (\"value\" in descriptor) descriptor.writable = true;\n      Object.defineProperty(target, descriptor.key, descriptor);\n    }\n  }\n  return function (Constructor, protoProps, staticProps) {\n    if (protoProps) defineProperties(Constructor.prototype, protoProps);\n    if (staticProps) defineProperties(Constructor, staticProps);\n    return Constructor;\n  };\n}();\nvar slicedToArray = function () {\n  function sliceIterator(arr, i) {\n    var _arr = [];\n    var _n = true;\n    var _d = false;\n    var _e = undefined;\n    try {\n      for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {\n        _arr.push(_s.value);\n        if (i && _arr.length === i) break;\n      }\n    } catch (err) {\n      _d = true;\n      _e = err;\n    } finally {\n      try {\n        if (!_n && _i[\"return\"]) _i[\"return\"]();\n      } finally {\n        if (_d) throw _e;\n      }\n    }\n    return _arr;\n  }\n  return function (arr, i) {\n    if (Array.isArray(arr)) {\n      return arr;\n    } else if (Symbol.iterator in Object(arr)) {\n      return sliceIterator(arr, i);\n    } else {\n      throw new TypeError(\"Invalid attempt to destructure non-iterable instance\");\n    }\n  };\n}();\nvar MIN_TIMESTEP = 0.001;\nvar MAX_TIMESTEP = 1;\nvar dataUri = function dataUri(mimeType, svg) {\n  return 'data:' + mimeType + ',' + encodeURIComponent(svg);\n};\nvar lerp = function lerp(a, b, t) {\n  return a + (b - a) * t;\n};\nvar isIOS = function () {\n  var isIOS = /iPad|iPhone|iPod/.test(navigator.platform);\n  return function () {\n    return isIOS;\n  };\n}();\nvar isWebViewAndroid = function () {\n  var isWebViewAndroid = navigator.userAgent.indexOf('Version') !== -1 && navigator.userAgent.indexOf('Android') !== -1 && navigator.userAgent.indexOf('Chrome') !== -1;\n  return function () {\n    return isWebViewAndroid;\n  };\n}();\nvar isSafari = function () {\n  var isSafari = /^((?!chrome|android).)*safari/i.test(navigator.userAgent);\n  return function () {\n    return isSafari;\n  };\n}();\nvar isFirefoxAndroid = function () {\n  var isFirefoxAndroid = navigator.userAgent.indexOf('Firefox') !== -1 && navigator.userAgent.indexOf('Android') !== -1;\n  return function () {\n    return isFirefoxAndroid;\n  };\n}();\nvar getChromeVersion = function () {\n  var match = navigator.userAgent.match(/.*Chrome\\/([0-9]+)/);\n  var value = match ? parseInt(match[1], 10) : null;\n  return function () {\n    return value;\n  };\n}();\nvar isSafariWithoutDeviceMotion = function () {\n  var value = false;\n  value = isIOS() && isSafari() && navigator.userAgent.indexOf('13_4') !== -1;\n  return function () {\n    return value;\n  };\n}();\nvar isChromeWithoutDeviceMotion = function () {\n  var value = false;\n  if (getChromeVersion() === 65) {\n    var match = navigator.userAgent.match(/.*Chrome\\/([0-9\\.]*)/);\n    if (match) {\n      var _match$1$split = match[1].split('.'),\n          _match$1$split2 = slicedToArray(_match$1$split, 4),\n          major = _match$1$split2[0],\n          minor = _match$1$split2[1],\n          branch = _match$1$split2[2],\n          build = _match$1$split2[3];\n      value = parseInt(branch, 10) === 3325 && parseInt(build, 10) < 148;\n    }\n  }\n  return function () {\n    return value;\n  };\n}();\nvar isR7 = function () {\n  var isR7 = navigator.userAgent.indexOf('R7 Build') !== -1;\n  return function () {\n    return isR7;\n  };\n}();\nvar isLandscapeMode = function isLandscapeMode() {\n  var rtn = window.orientation == 90 || window.orientation == -90;\n  return isR7() ? !rtn : rtn;\n};\nvar isTimestampDeltaValid = function isTimestampDeltaValid(timestampDeltaS) {\n  if (isNaN(timestampDeltaS)) {\n    return false;\n  }\n  if (timestampDeltaS <= MIN_TIMESTEP) {\n    return false;\n  }\n  if (timestampDeltaS > MAX_TIMESTEP) {\n    return false;\n  }\n  return true;\n};\nvar getScreenWidth = function getScreenWidth() {\n  return Math.max(window.screen.width, window.screen.height) * window.devicePixelRatio;\n};\nvar getScreenHeight = function getScreenHeight() {\n  return Math.min(window.screen.width, window.screen.height) * window.devicePixelRatio;\n};\nvar requestFullscreen = function requestFullscreen(element) {\n  if (isWebViewAndroid()) {\n    return false;\n  }\n  if (element.requestFullscreen) {\n    element.requestFullscreen();\n  } else if (element.webkitRequestFullscreen) {\n    element.webkitRequestFullscreen();\n  } else if (element.mozRequestFullScreen) {\n    element.mozRequestFullScreen();\n  } else if (element.msRequestFullscreen) {\n    element.msRequestFullscreen();\n  } else {\n    return false;\n  }\n  return true;\n};\nvar exitFullscreen = function exitFullscreen() {\n  if (document.exitFullscreen) {\n    document.exitFullscreen();\n  } else if (document.webkitExitFullscreen) {\n    document.webkitExitFullscreen();\n  } else if (document.mozCancelFullScreen) {\n    document.mozCancelFullScreen();\n  } else if (document.msExitFullscreen) {\n    document.msExitFullscreen();\n  } else {\n    return false;\n  }\n  return true;\n};\nvar getFullscreenElement = function getFullscreenElement() {\n  return document.fullscreenElement || document.webkitFullscreenElement || document.mozFullScreenElement || document.msFullscreenElement;\n};\nvar linkProgram = function linkProgram(gl, vertexSource, fragmentSource, attribLocationMap) {\n  var vertexShader = gl.createShader(gl.VERTEX_SHADER);\n  gl.shaderSource(vertexShader, vertexSource);\n  gl.compileShader(vertexShader);\n  var fragmentShader = gl.createShader(gl.FRAGMENT_SHADER);\n  gl.shaderSource(fragmentShader, fragmentSource);\n  gl.compileShader(fragmentShader);\n  var program = gl.createProgram();\n  gl.attachShader(program, vertexShader);\n  gl.attachShader(program, fragmentShader);\n  for (var attribName in attribLocationMap) {\n    gl.bindAttribLocation(program, attribLocationMap[attribName], attribName);\n  }gl.linkProgram(program);\n  gl.deleteShader(vertexShader);\n  gl.deleteShader(fragmentShader);\n  return program;\n};\nvar getProgramUniforms = function getProgramUniforms(gl, program) {\n  var uniforms = {};\n  var uniformCount = gl.getProgramParameter(program, gl.ACTIVE_UNIFORMS);\n  var uniformName = '';\n  for (var i = 0; i < uniformCount; i++) {\n    var uniformInfo = gl.getActiveUniform(program, i);\n    uniformName = uniformInfo.name.replace('[0]', '');\n    uniforms[uniformName] = gl.getUniformLocation(program, uniformName);\n  }\n  return uniforms;\n};\nvar orthoMatrix = function orthoMatrix(out, left, right, bottom, top, near, far) {\n  var lr = 1 / (left - right),\n      bt = 1 / (bottom - top),\n      nf = 1 / (near - far);\n  out[0] = -2 * lr;\n  out[1] = 0;\n  out[2] = 0;\n  out[3] = 0;\n  out[4] = 0;\n  out[5] = -2 * bt;\n  out[6] = 0;\n  out[7] = 0;\n  out[8] = 0;\n  out[9] = 0;\n  out[10] = 2 * nf;\n  out[11] = 0;\n  out[12] = (left + right) * lr;\n  out[13] = (top + bottom) * bt;\n  out[14] = (far + near) * nf;\n  out[15] = 1;\n  return out;\n};\nvar isMobile = function isMobile() {\n  var check = false;\n  (function (a) {\n    if (/(android|bb\\d+|meego).+mobile|avantgo|bada\\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\\.(browser|link)|vodafone|wap|windows ce|xda|xiino/i.test(a) || /1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\\-(n|u)|c55\\/|capi|ccwa|cdm\\-|cell|chtm|cldc|cmd\\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\\-s|devi|dica|dmob|do(c|p)o|ds(12|\\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\\-|_)|g1 u|g560|gene|gf\\-5|g\\-mo|go(\\.w|od)|gr(ad|un)|haie|hcit|hd\\-(m|p|t)|hei\\-|hi(pt|ta)|hp( i|ip)|hs\\-c|ht(c(\\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\\-(20|go|ma)|i230|iac( |\\-|\\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\\/)|klon|kpt |kwc\\-|kyo(c|k)|le(no|xi)|lg( g|\\/(k|l|u)|50|54|\\-[a-w])|libw|lynx|m1\\-w|m3ga|m50\\/|ma(te|ui|xo)|mc(01|21|ca)|m\\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\\-2|po(ck|rt|se)|prox|psio|pt\\-g|qa\\-a|qc(07|12|21|32|60|\\-[2-7]|i\\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\\-|oo|p\\-)|sdk\\/|se(c(\\-|0|1)|47|mc|nd|ri)|sgh\\-|shar|sie(\\-|m)|sk\\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\\-|v\\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\\-|tdg\\-|tel(i|m)|tim\\-|t\\-mo|to(pl|sh)|ts(70|m\\-|m3|m5)|tx\\-9|up(\\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\\-|your|zeto|zte\\-/i.test(a.substr(0, 4))) check = true;\n  })(navigator.userAgent || navigator.vendor || window.opera);\n  return check;\n};\nvar extend = function extend(dest, src) {\n  for (var key in src) {\n    if (src.hasOwnProperty(key)) {\n      dest[key] = src[key];\n    }\n  }\n  return dest;\n};\nvar safariCssSizeWorkaround = function safariCssSizeWorkaround(canvas) {\n  if (isIOS()) {\n    var width = canvas.style.width;\n    var height = canvas.style.height;\n    canvas.style.width = parseInt(width) + 1 + 'px';\n    canvas.style.height = parseInt(height) + 'px';\n    setTimeout(function () {\n      canvas.style.width = width;\n      canvas.style.height = height;\n    }, 100);\n  }\n  window.canvas = canvas;\n};\nvar frameDataFromPose = function () {\n  var piOver180 = Math.PI / 180.0;\n  var rad45 = Math.PI * 0.25;\n  function mat4_perspectiveFromFieldOfView(out, fov, near, far) {\n    var upTan = Math.tan(fov ? fov.upDegrees * piOver180 : rad45),\n        downTan = Math.tan(fov ? fov.downDegrees * piOver180 : rad45),\n        leftTan = Math.tan(fov ? fov.leftDegrees * piOver180 : rad45),\n        rightTan = Math.tan(fov ? fov.rightDegrees * piOver180 : rad45),\n        xScale = 2.0 / (leftTan + rightTan),\n        yScale = 2.0 / (upTan + downTan);\n    out[0] = xScale;\n    out[1] = 0.0;\n    out[2] = 0.0;\n    out[3] = 0.0;\n    out[4] = 0.0;\n    out[5] = yScale;\n    out[6] = 0.0;\n    out[7] = 0.0;\n    out[8] = -((leftTan - rightTan) * xScale * 0.5);\n    out[9] = (upTan - downTan) * yScale * 0.5;\n    out[10] = far / (near - far);\n    out[11] = -1.0;\n    out[12] = 0.0;\n    out[13] = 0.0;\n    out[14] = far * near / (near - far);\n    out[15] = 0.0;\n    return out;\n  }\n  function mat4_fromRotationTranslation(out, q, v) {\n    var x = q[0],\n        y = q[1],\n        z = q[2],\n        w = q[3],\n        x2 = x + x,\n        y2 = y + y,\n        z2 = z + z,\n        xx = x * x2,\n        xy = x * y2,\n        xz = x * z2,\n        yy = y * y2,\n        yz = y * z2,\n        zz = z * z2,\n        wx = w * x2,\n        wy = w * y2,\n        wz = w * z2;\n    out[0] = 1 - (yy + zz);\n    out[1] = xy + wz;\n    out[2] = xz - wy;\n    out[3] = 0;\n    out[4] = xy - wz;\n    out[5] = 1 - (xx + zz);\n    out[6] = yz + wx;\n    out[7] = 0;\n    out[8] = xz + wy;\n    out[9] = yz - wx;\n    out[10] = 1 - (xx + yy);\n    out[11] = 0;\n    out[12] = v[0];\n    out[13] = v[1];\n    out[14] = v[2];\n    out[15] = 1;\n    return out;\n  }\n  function mat4_translate(out, a, v) {\n    var x = v[0],\n        y = v[1],\n        z = v[2],\n        a00,\n        a01,\n        a02,\n        a03,\n        a10,\n        a11,\n        a12,\n        a13,\n        a20,\n        a21,\n        a22,\n        a23;\n    if (a === out) {\n      out[12] = a[0] * x + a[4] * y + a[8] * z + a[12];\n      out[13] = a[1] * x + a[5] * y + a[9] * z + a[13];\n      out[14] = a[2] * x + a[6] * y + a[10] * z + a[14];\n      out[15] = a[3] * x + a[7] * y + a[11] * z + a[15];\n    } else {\n      a00 = a[0];a01 = a[1];a02 = a[2];a03 = a[3];\n      a10 = a[4];a11 = a[5];a12 = a[6];a13 = a[7];\n      a20 = a[8];a21 = a[9];a22 = a[10];a23 = a[11];\n      out[0] = a00;out[1] = a01;out[2] = a02;out[3] = a03;\n      out[4] = a10;out[5] = a11;out[6] = a12;out[7] = a13;\n      out[8] = a20;out[9] = a21;out[10] = a22;out[11] = a23;\n      out[12] = a00 * x + a10 * y + a20 * z + a[12];\n      out[13] = a01 * x + a11 * y + a21 * z + a[13];\n      out[14] = a02 * x + a12 * y + a22 * z + a[14];\n      out[15] = a03 * x + a13 * y + a23 * z + a[15];\n    }\n    return out;\n  }\n  function mat4_invert(out, a) {\n    var a00 = a[0],\n        a01 = a[1],\n        a02 = a[2],\n        a03 = a[3],\n        a10 = a[4],\n        a11 = a[5],\n        a12 = a[6],\n        a13 = a[7],\n        a20 = a[8],\n        a21 = a[9],\n        a22 = a[10],\n        a23 = a[11],\n        a30 = a[12],\n        a31 = a[13],\n        a32 = a[14],\n        a33 = a[15],\n        b00 = a00 * a11 - a01 * a10,\n        b01 = a00 * a12 - a02 * a10,\n        b02 = a00 * a13 - a03 * a10,\n        b03 = a01 * a12 - a02 * a11,\n        b04 = a01 * a13 - a03 * a11,\n        b05 = a02 * a13 - a03 * a12,\n        b06 = a20 * a31 - a21 * a30,\n        b07 = a20 * a32 - a22 * a30,\n        b08 = a20 * a33 - a23 * a30,\n        b09 = a21 * a32 - a22 * a31,\n        b10 = a21 * a33 - a23 * a31,\n        b11 = a22 * a33 - a23 * a32,\n    det = b00 * b11 - b01 * b10 + b02 * b09 + b03 * b08 - b04 * b07 + b05 * b06;\n    if (!det) {\n      return null;\n    }\n    det = 1.0 / det;\n    out[0] = (a11 * b11 - a12 * b10 + a13 * b09) * det;\n    out[1] = (a02 * b10 - a01 * b11 - a03 * b09) * det;\n    out[2] = (a31 * b05 - a32 * b04 + a33 * b03) * det;\n    out[3] = (a22 * b04 - a21 * b05 - a23 * b03) * det;\n    out[4] = (a12 * b08 - a10 * b11 - a13 * b07) * det;\n    out[5] = (a00 * b11 - a02 * b08 + a03 * b07) * det;\n    out[6] = (a32 * b02 - a30 * b05 - a33 * b01) * det;\n    out[7] = (a20 * b05 - a22 * b02 + a23 * b01) * det;\n    out[8] = (a10 * b10 - a11 * b08 + a13 * b06) * det;\n    out[9] = (a01 * b08 - a00 * b10 - a03 * b06) * det;\n    out[10] = (a30 * b04 - a31 * b02 + a33 * b00) * det;\n    out[11] = (a21 * b02 - a20 * b04 - a23 * b00) * det;\n    out[12] = (a11 * b07 - a10 * b09 - a12 * b06) * det;\n    out[13] = (a00 * b09 - a01 * b07 + a02 * b06) * det;\n    out[14] = (a31 * b01 - a30 * b03 - a32 * b00) * det;\n    out[15] = (a20 * b03 - a21 * b01 + a22 * b00) * det;\n    return out;\n  }\n  var defaultOrientation = new Float32Array([0, 0, 0, 1]);\n  var defaultPosition = new Float32Array([0, 0, 0]);\n  function updateEyeMatrices(projection, view, pose, fov, offset, vrDisplay) {\n    mat4_perspectiveFromFieldOfView(projection, fov || null, vrDisplay.depthNear, vrDisplay.depthFar);\n    var orientation = pose.orientation || defaultOrientation;\n    var position = pose.position || defaultPosition;\n    mat4_fromRotationTranslation(view, orientation, position);\n    if (offset) mat4_translate(view, view, offset);\n    mat4_invert(view, view);\n  }\n  return function (frameData, pose, vrDisplay) {\n    if (!frameData || !pose) return false;\n    frameData.pose = pose;\n    frameData.timestamp = pose.timestamp;\n    updateEyeMatrices(frameData.leftProjectionMatrix, frameData.leftViewMatrix, pose, vrDisplay._getFieldOfView(\"left\"), vrDisplay._getEyeOffset(\"left\"), vrDisplay);\n    updateEyeMatrices(frameData.rightProjectionMatrix, frameData.rightViewMatrix, pose, vrDisplay._getFieldOfView(\"right\"), vrDisplay._getEyeOffset(\"right\"), vrDisplay);\n    return true;\n  };\n}();\nvar isInsideCrossOriginIFrame = function isInsideCrossOriginIFrame() {\n  var isFramed = window.self !== window.top;\n  var refOrigin = getOriginFromUrl(document.referrer);\n  var thisOrigin = getOriginFromUrl(window.location.href);\n  return isFramed && refOrigin !== thisOrigin;\n};\nvar getOriginFromUrl = function getOriginFromUrl(url) {\n  var domainIdx;\n  var protoSepIdx = url.indexOf(\"://\");\n  if (protoSepIdx !== -1) {\n    domainIdx = protoSepIdx + 3;\n  } else {\n    domainIdx = 0;\n  }\n  var domainEndIdx = url.indexOf('/', domainIdx);\n  if (domainEndIdx === -1) {\n    domainEndIdx = url.length;\n  }\n  return url.substring(0, domainEndIdx);\n};\nvar getQuaternionAngle = function getQuaternionAngle(quat) {\n  if (quat.w > 1) {\n    console.warn('getQuaternionAngle: w > 1');\n    return 0;\n  }\n  var angle = 2 * Math.acos(quat.w);\n  return angle;\n};\nvar warnOnce = function () {\n  var observedWarnings = {};\n  return function (key, message) {\n    if (observedWarnings[key] === undefined) {\n      console.warn('webvr-polyfill: ' + message);\n      observedWarnings[key] = true;\n    }\n  };\n}();\nvar deprecateWarning = function deprecateWarning(deprecated, suggested) {\n  var alternative = suggested ? 'Please use ' + suggested + ' instead.' : '';\n  warnOnce(deprecated, deprecated + ' has been deprecated. ' + 'This may not work on native WebVR displays. ' + alternative);\n};\nfunction WGLUPreserveGLState(gl, bindings, callback) {\n  if (!bindings) {\n    callback(gl);\n    return;\n  }\n  var boundValues = [];\n  var activeTexture = null;\n  for (var i = 0; i < bindings.length; ++i) {\n    var binding = bindings[i];\n    switch (binding) {\n      case gl.TEXTURE_BINDING_2D:\n      case gl.TEXTURE_BINDING_CUBE_MAP:\n        var textureUnit = bindings[++i];\n        if (textureUnit < gl.TEXTURE0 || textureUnit > gl.TEXTURE31) {\n          console.error(\"TEXTURE_BINDING_2D or TEXTURE_BINDING_CUBE_MAP must be followed by a valid texture unit\");\n          boundValues.push(null, null);\n          break;\n        }\n        if (!activeTexture) {\n          activeTexture = gl.getParameter(gl.ACTIVE_TEXTURE);\n        }\n        gl.activeTexture(textureUnit);\n        boundValues.push(gl.getParameter(binding), null);\n        break;\n      case gl.ACTIVE_TEXTURE:\n        activeTexture = gl.getParameter(gl.ACTIVE_TEXTURE);\n        boundValues.push(null);\n        break;\n      default:\n        boundValues.push(gl.getParameter(binding));\n        break;\n    }\n  }\n  callback(gl);\n  for (var i = 0; i < bindings.length; ++i) {\n    var binding = bindings[i];\n    var boundValue = boundValues[i];\n    switch (binding) {\n      case gl.ACTIVE_TEXTURE:\n        break;\n      case gl.ARRAY_BUFFER_BINDING:\n        gl.bindBuffer(gl.ARRAY_BUFFER, boundValue);\n        break;\n      case gl.COLOR_CLEAR_VALUE:\n        gl.clearColor(boundValue[0], boundValue[1], boundValue[2], boundValue[3]);\n        break;\n      case gl.COLOR_WRITEMASK:\n        gl.colorMask(boundValue[0], boundValue[1], boundValue[2], boundValue[3]);\n        break;\n      case gl.CURRENT_PROGRAM:\n        gl.useProgram(boundValue);\n        break;\n      case gl.ELEMENT_ARRAY_BUFFER_BINDING:\n        gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, boundValue);\n        break;\n      case gl.FRAMEBUFFER_BINDING:\n        gl.bindFramebuffer(gl.FRAMEBUFFER, boundValue);\n        break;\n      case gl.RENDERBUFFER_BINDING:\n        gl.bindRenderbuffer(gl.RENDERBUFFER, boundValue);\n        break;\n      case gl.TEXTURE_BINDING_2D:\n        var textureUnit = bindings[++i];\n        if (textureUnit < gl.TEXTURE0 || textureUnit > gl.TEXTURE31)\n          break;\n        gl.activeTexture(textureUnit);\n        gl.bindTexture(gl.TEXTURE_2D, boundValue);\n        break;\n      case gl.TEXTURE_BINDING_CUBE_MAP:\n        var textureUnit = bindings[++i];\n        if (textureUnit < gl.TEXTURE0 || textureUnit > gl.TEXTURE31)\n          break;\n        gl.activeTexture(textureUnit);\n        gl.bindTexture(gl.TEXTURE_CUBE_MAP, boundValue);\n        break;\n      case gl.VIEWPORT:\n        gl.viewport(boundValue[0], boundValue[1], boundValue[2], boundValue[3]);\n        break;\n      case gl.BLEND:\n      case gl.CULL_FACE:\n      case gl.DEPTH_TEST:\n      case gl.SCISSOR_TEST:\n      case gl.STENCIL_TEST:\n        if (boundValue) {\n          gl.enable(binding);\n        } else {\n          gl.disable(binding);\n        }\n        break;\n      default:\n        console.log(\"No GL restore behavior for 0x\" + binding.toString(16));\n        break;\n    }\n    if (activeTexture) {\n      gl.activeTexture(activeTexture);\n    }\n  }\n}\nvar glPreserveState = WGLUPreserveGLState;\nvar distortionVS = ['attribute vec2 position;', 'attribute vec3 texCoord;', 'varying vec2 vTexCoord;', 'uniform vec4 viewportOffsetScale[2];', 'void main() {', '  vec4 viewport = viewportOffsetScale[int(texCoord.z)];', '  vTexCoord = (texCoord.xy * viewport.zw) + viewport.xy;', '  gl_Position = vec4( position, 1.0, 1.0 );', '}'].join('\\n');\nvar distortionFS = ['precision mediump float;', 'uniform sampler2D diffuse;', 'varying vec2 vTexCoord;', 'void main() {', '  gl_FragColor = texture2D(diffuse, vTexCoord);', '}'].join('\\n');\nfunction CardboardDistorter(gl, cardboardUI, bufferScale, dirtySubmitFrameBindings) {\n  this.gl = gl;\n  this.cardboardUI = cardboardUI;\n  this.bufferScale = bufferScale;\n  this.dirtySubmitFrameBindings = dirtySubmitFrameBindings;\n  this.ctxAttribs = gl.getContextAttributes();\n  this.instanceExt = gl.getExtension('ANGLE_instanced_arrays');\n  this.meshWidth = 20;\n  this.meshHeight = 20;\n  this.bufferWidth = gl.drawingBufferWidth;\n  this.bufferHeight = gl.drawingBufferHeight;\n  this.realBindFramebuffer = gl.bindFramebuffer;\n  this.realEnable = gl.enable;\n  this.realDisable = gl.disable;\n  this.realColorMask = gl.colorMask;\n  this.realClearColor = gl.clearColor;\n  this.realViewport = gl.viewport;\n  if (!isIOS()) {\n    this.realCanvasWidth = Object.getOwnPropertyDescriptor(gl.canvas.__proto__, 'width');\n    this.realCanvasHeight = Object.getOwnPropertyDescriptor(gl.canvas.__proto__, 'height');\n  }\n  this.isPatched = false;\n  this.lastBoundFramebuffer = null;\n  this.cullFace = false;\n  this.depthTest = false;\n  this.blend = false;\n  this.scissorTest = false;\n  this.stencilTest = false;\n  this.viewport = [0, 0, 0, 0];\n  this.colorMask = [true, true, true, true];\n  this.clearColor = [0, 0, 0, 0];\n  this.attribs = {\n    position: 0,\n    texCoord: 1\n  };\n  this.program = linkProgram(gl, distortionVS, distortionFS, this.attribs);\n  this.uniforms = getProgramUniforms(gl, this.program);\n  this.viewportOffsetScale = new Float32Array(8);\n  this.setTextureBounds();\n  this.vertexBuffer = gl.createBuffer();\n  this.indexBuffer = gl.createBuffer();\n  this.indexCount = 0;\n  this.renderTarget = gl.createTexture();\n  this.framebuffer = gl.createFramebuffer();\n  this.depthStencilBuffer = null;\n  this.depthBuffer = null;\n  this.stencilBuffer = null;\n  if (this.ctxAttribs.depth && this.ctxAttribs.stencil) {\n    this.depthStencilBuffer = gl.createRenderbuffer();\n  } else if (this.ctxAttribs.depth) {\n    this.depthBuffer = gl.createRenderbuffer();\n  } else if (this.ctxAttribs.stencil) {\n    this.stencilBuffer = gl.createRenderbuffer();\n  }\n  this.patch();\n  this.onResize();\n}\nCardboardDistorter.prototype.destroy = function () {\n  var gl = this.gl;\n  this.unpatch();\n  gl.deleteProgram(this.program);\n  gl.deleteBuffer(this.vertexBuffer);\n  gl.deleteBuffer(this.indexBuffer);\n  gl.deleteTexture(this.renderTarget);\n  gl.deleteFramebuffer(this.framebuffer);\n  if (this.depthStencilBuffer) {\n    gl.deleteRenderbuffer(this.depthStencilBuffer);\n  }\n  if (this.depthBuffer) {\n    gl.deleteRenderbuffer(this.depthBuffer);\n  }\n  if (this.stencilBuffer) {\n    gl.deleteRenderbuffer(this.stencilBuffer);\n  }\n  if (this.cardboardUI) {\n    this.cardboardUI.destroy();\n  }\n};\nCardboardDistorter.prototype.onResize = function () {\n  var gl = this.gl;\n  var self = this;\n  var glState = [gl.RENDERBUFFER_BINDING, gl.TEXTURE_BINDING_2D, gl.TEXTURE0];\n  glPreserveState(gl, glState, function (gl) {\n    self.realBindFramebuffer.call(gl, gl.FRAMEBUFFER, null);\n    if (self.scissorTest) {\n      self.realDisable.call(gl, gl.SCISSOR_TEST);\n    }\n    self.realColorMask.call(gl, true, true, true, true);\n    self.realViewport.call(gl, 0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight);\n    self.realClearColor.call(gl, 0, 0, 0, 1);\n    gl.clear(gl.COLOR_BUFFER_BIT);\n    self.realBindFramebuffer.call(gl, gl.FRAMEBUFFER, self.framebuffer);\n    gl.bindTexture(gl.TEXTURE_2D, self.renderTarget);\n    gl.texImage2D(gl.TEXTURE_2D, 0, self.ctxAttribs.alpha ? gl.RGBA : gl.RGB, self.bufferWidth, self.bufferHeight, 0, self.ctxAttribs.alpha ? gl.RGBA : gl.RGB, gl.UNSIGNED_BYTE, null);\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);\n    gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, self.renderTarget, 0);\n    if (self.ctxAttribs.depth && self.ctxAttribs.stencil) {\n      gl.bindRenderbuffer(gl.RENDERBUFFER, self.depthStencilBuffer);\n      gl.renderbufferStorage(gl.RENDERBUFFER, gl.DEPTH_STENCIL, self.bufferWidth, self.bufferHeight);\n      gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.DEPTH_STENCIL_ATTACHMENT, gl.RENDERBUFFER, self.depthStencilBuffer);\n    } else if (self.ctxAttribs.depth) {\n      gl.bindRenderbuffer(gl.RENDERBUFFER, self.depthBuffer);\n      gl.renderbufferStorage(gl.RENDERBUFFER, gl.DEPTH_COMPONENT16, self.bufferWidth, self.bufferHeight);\n      gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.DEPTH_ATTACHMENT, gl.RENDERBUFFER, self.depthBuffer);\n    } else if (self.ctxAttribs.stencil) {\n      gl.bindRenderbuffer(gl.RENDERBUFFER, self.stencilBuffer);\n      gl.renderbufferStorage(gl.RENDERBUFFER, gl.STENCIL_INDEX8, self.bufferWidth, self.bufferHeight);\n      gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.STENCIL_ATTACHMENT, gl.RENDERBUFFER, self.stencilBuffer);\n    }\n    if (!gl.checkFramebufferStatus(gl.FRAMEBUFFER) === gl.FRAMEBUFFER_COMPLETE) {\n      console.error('Framebuffer incomplete!');\n    }\n    self.realBindFramebuffer.call(gl, gl.FRAMEBUFFER, self.lastBoundFramebuffer);\n    if (self.scissorTest) {\n      self.realEnable.call(gl, gl.SCISSOR_TEST);\n    }\n    self.realColorMask.apply(gl, self.colorMask);\n    self.realViewport.apply(gl, self.viewport);\n    self.realClearColor.apply(gl, self.clearColor);\n  });\n  if (this.cardboardUI) {\n    this.cardboardUI.onResize();\n  }\n};\nCardboardDistorter.prototype.patch = function () {\n  if (this.isPatched) {\n    return;\n  }\n  var self = this;\n  var canvas = this.gl.canvas;\n  var gl = this.gl;\n  if (!isIOS()) {\n    canvas.width = getScreenWidth() * this.bufferScale;\n    canvas.height = getScreenHeight() * this.bufferScale;\n    Object.defineProperty(canvas, 'width', {\n      configurable: true,\n      enumerable: true,\n      get: function get() {\n        return self.bufferWidth;\n      },\n      set: function set(value) {\n        self.bufferWidth = value;\n        self.realCanvasWidth.set.call(canvas, value);\n        self.onResize();\n      }\n    });\n    Object.defineProperty(canvas, 'height', {\n      configurable: true,\n      enumerable: true,\n      get: function get() {\n        return self.bufferHeight;\n      },\n      set: function set(value) {\n        self.bufferHeight = value;\n        self.realCanvasHeight.set.call(canvas, value);\n        self.onResize();\n      }\n    });\n  }\n  this.lastBoundFramebuffer = gl.getParameter(gl.FRAMEBUFFER_BINDING);\n  if (this.lastBoundFramebuffer == null) {\n    this.lastBoundFramebuffer = this.framebuffer;\n    this.gl.bindFramebuffer(gl.FRAMEBUFFER, this.framebuffer);\n  }\n  this.gl.bindFramebuffer = function (target, framebuffer) {\n    self.lastBoundFramebuffer = framebuffer ? framebuffer : self.framebuffer;\n    self.realBindFramebuffer.call(gl, target, self.lastBoundFramebuffer);\n  };\n  this.cullFace = gl.getParameter(gl.CULL_FACE);\n  this.depthTest = gl.getParameter(gl.DEPTH_TEST);\n  this.blend = gl.getParameter(gl.BLEND);\n  this.scissorTest = gl.getParameter(gl.SCISSOR_TEST);\n  this.stencilTest = gl.getParameter(gl.STENCIL_TEST);\n  gl.enable = function (pname) {\n    switch (pname) {\n      case gl.CULL_FACE:\n        self.cullFace = true;break;\n      case gl.DEPTH_TEST:\n        self.depthTest = true;break;\n      case gl.BLEND:\n        self.blend = true;break;\n      case gl.SCISSOR_TEST:\n        self.scissorTest = true;break;\n      case gl.STENCIL_TEST:\n        self.stencilTest = true;break;\n    }\n    self.realEnable.call(gl, pname);\n  };\n  gl.disable = function (pname) {\n    switch (pname) {\n      case gl.CULL_FACE:\n        self.cullFace = false;break;\n      case gl.DEPTH_TEST:\n        self.depthTest = false;break;\n      case gl.BLEND:\n        self.blend = false;break;\n      case gl.SCISSOR_TEST:\n        self.scissorTest = false;break;\n      case gl.STENCIL_TEST:\n        self.stencilTest = false;break;\n    }\n    self.realDisable.call(gl, pname);\n  };\n  this.colorMask = gl.getParameter(gl.COLOR_WRITEMASK);\n  gl.colorMask = function (r, g, b, a) {\n    self.colorMask[0] = r;\n    self.colorMask[1] = g;\n    self.colorMask[2] = b;\n    self.colorMask[3] = a;\n    self.realColorMask.call(gl, r, g, b, a);\n  };\n  this.clearColor = gl.getParameter(gl.COLOR_CLEAR_VALUE);\n  gl.clearColor = function (r, g, b, a) {\n    self.clearColor[0] = r;\n    self.clearColor[1] = g;\n    self.clearColor[2] = b;\n    self.clearColor[3] = a;\n    self.realClearColor.call(gl, r, g, b, a);\n  };\n  this.viewport = gl.getParameter(gl.VIEWPORT);\n  gl.viewport = function (x, y, w, h) {\n    self.viewport[0] = x;\n    self.viewport[1] = y;\n    self.viewport[2] = w;\n    self.viewport[3] = h;\n    self.realViewport.call(gl, x, y, w, h);\n  };\n  this.isPatched = true;\n  safariCssSizeWorkaround(canvas);\n};\nCardboardDistorter.prototype.unpatch = function () {\n  if (!this.isPatched) {\n    return;\n  }\n  var gl = this.gl;\n  var canvas = this.gl.canvas;\n  if (!isIOS()) {\n    Object.defineProperty(canvas, 'width', this.realCanvasWidth);\n    Object.defineProperty(canvas, 'height', this.realCanvasHeight);\n  }\n  canvas.width = this.bufferWidth;\n  canvas.height = this.bufferHeight;\n  gl.bindFramebuffer = this.realBindFramebuffer;\n  gl.enable = this.realEnable;\n  gl.disable = this.realDisable;\n  gl.colorMask = this.realColorMask;\n  gl.clearColor = this.realClearColor;\n  gl.viewport = this.realViewport;\n  if (this.lastBoundFramebuffer == this.framebuffer) {\n    gl.bindFramebuffer(gl.FRAMEBUFFER, null);\n  }\n  this.isPatched = false;\n  setTimeout(function () {\n    safariCssSizeWorkaround(canvas);\n  }, 1);\n};\nCardboardDistorter.prototype.setTextureBounds = function (leftBounds, rightBounds) {\n  if (!leftBounds) {\n    leftBounds = [0, 0, 0.5, 1];\n  }\n  if (!rightBounds) {\n    rightBounds = [0.5, 0, 0.5, 1];\n  }\n  this.viewportOffsetScale[0] = leftBounds[0];\n  this.viewportOffsetScale[1] = leftBounds[1];\n  this.viewportOffsetScale[2] = leftBounds[2];\n  this.viewportOffsetScale[3] = leftBounds[3];\n  this.viewportOffsetScale[4] = rightBounds[0];\n  this.viewportOffsetScale[5] = rightBounds[1];\n  this.viewportOffsetScale[6] = rightBounds[2];\n  this.viewportOffsetScale[7] = rightBounds[3];\n};\nCardboardDistorter.prototype.submitFrame = function () {\n  var gl = this.gl;\n  var self = this;\n  var glState = [];\n  if (!this.dirtySubmitFrameBindings) {\n    glState.push(gl.CURRENT_PROGRAM, gl.ARRAY_BUFFER_BINDING, gl.ELEMENT_ARRAY_BUFFER_BINDING, gl.TEXTURE_BINDING_2D, gl.TEXTURE0);\n  }\n  glPreserveState(gl, glState, function (gl) {\n    self.realBindFramebuffer.call(gl, gl.FRAMEBUFFER, null);\n    var positionDivisor = 0;\n    var texCoordDivisor = 0;\n    if (self.instanceExt) {\n      positionDivisor = gl.getVertexAttrib(self.attribs.position, self.instanceExt.VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE);\n      texCoordDivisor = gl.getVertexAttrib(self.attribs.texCoord, self.instanceExt.VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE);\n    }\n    if (self.cullFace) {\n      self.realDisable.call(gl, gl.CULL_FACE);\n    }\n    if (self.depthTest) {\n      self.realDisable.call(gl, gl.DEPTH_TEST);\n    }\n    if (self.blend) {\n      self.realDisable.call(gl, gl.BLEND);\n    }\n    if (self.scissorTest) {\n      self.realDisable.call(gl, gl.SCISSOR_TEST);\n    }\n    if (self.stencilTest) {\n      self.realDisable.call(gl, gl.STENCIL_TEST);\n    }\n    self.realColorMask.call(gl, true, true, true, true);\n    self.realViewport.call(gl, 0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight);\n    if (self.ctxAttribs.alpha || isIOS()) {\n      self.realClearColor.call(gl, 0, 0, 0, 1);\n      gl.clear(gl.COLOR_BUFFER_BIT);\n    }\n    gl.useProgram(self.program);\n    gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, self.indexBuffer);\n    gl.bindBuffer(gl.ARRAY_BUFFER, self.vertexBuffer);\n    gl.enableVertexAttribArray(self.attribs.position);\n    gl.enableVertexAttribArray(self.attribs.texCoord);\n    gl.vertexAttribPointer(self.attribs.position, 2, gl.FLOAT, false, 20, 0);\n    gl.vertexAttribPointer(self.attribs.texCoord, 3, gl.FLOAT, false, 20, 8);\n    if (self.instanceExt) {\n      if (positionDivisor != 0) {\n        self.instanceExt.vertexAttribDivisorANGLE(self.attribs.position, 0);\n      }\n      if (texCoordDivisor != 0) {\n        self.instanceExt.vertexAttribDivisorANGLE(self.attribs.texCoord, 0);\n      }\n    }\n    gl.activeTexture(gl.TEXTURE0);\n    gl.uniform1i(self.uniforms.diffuse, 0);\n    gl.bindTexture(gl.TEXTURE_2D, self.renderTarget);\n    gl.uniform4fv(self.uniforms.viewportOffsetScale, self.viewportOffsetScale);\n    gl.drawElements(gl.TRIANGLES, self.indexCount, gl.UNSIGNED_SHORT, 0);\n    if (self.cardboardUI) {\n      self.cardboardUI.renderNoState();\n    }\n    self.realBindFramebuffer.call(self.gl, gl.FRAMEBUFFER, self.framebuffer);\n    if (!self.ctxAttribs.preserveDrawingBuffer) {\n      self.realClearColor.call(gl, 0, 0, 0, 0);\n      gl.clear(gl.COLOR_BUFFER_BIT);\n    }\n    if (!self.dirtySubmitFrameBindings) {\n      self.realBindFramebuffer.call(gl, gl.FRAMEBUFFER, self.lastBoundFramebuffer);\n    }\n    if (self.cullFace) {\n      self.realEnable.call(gl, gl.CULL_FACE);\n    }\n    if (self.depthTest) {\n      self.realEnable.call(gl, gl.DEPTH_TEST);\n    }\n    if (self.blend) {\n      self.realEnable.call(gl, gl.BLEND);\n    }\n    if (self.scissorTest) {\n      self.realEnable.call(gl, gl.SCISSOR_TEST);\n    }\n    if (self.stencilTest) {\n      self.realEnable.call(gl, gl.STENCIL_TEST);\n    }\n    self.realColorMask.apply(gl, self.colorMask);\n    self.realViewport.apply(gl, self.viewport);\n    if (self.ctxAttribs.alpha || !self.ctxAttribs.preserveDrawingBuffer) {\n      self.realClearColor.apply(gl, self.clearColor);\n    }\n    if (self.instanceExt) {\n      if (positionDivisor != 0) {\n        self.instanceExt.vertexAttribDivisorANGLE(self.attribs.position, positionDivisor);\n      }\n      if (texCoordDivisor != 0) {\n        self.instanceExt.vertexAttribDivisorANGLE(self.attribs.texCoord, texCoordDivisor);\n      }\n    }\n  });\n  if (isIOS()) {\n    var canvas = gl.canvas;\n    if (canvas.width != self.bufferWidth || canvas.height != self.bufferHeight) {\n      self.bufferWidth = canvas.width;\n      self.bufferHeight = canvas.height;\n      self.onResize();\n    }\n  }\n};\nCardboardDistorter.prototype.updateDeviceInfo = function (deviceInfo) {\n  var gl = this.gl;\n  var self = this;\n  var glState = [gl.ARRAY_BUFFER_BINDING, gl.ELEMENT_ARRAY_BUFFER_BINDING];\n  glPreserveState(gl, glState, function (gl) {\n    var vertices = self.computeMeshVertices_(self.meshWidth, self.meshHeight, deviceInfo);\n    gl.bindBuffer(gl.ARRAY_BUFFER, self.vertexBuffer);\n    gl.bufferData(gl.ARRAY_BUFFER, vertices, gl.STATIC_DRAW);\n    if (!self.indexCount) {\n      var indices = self.computeMeshIndices_(self.meshWidth, self.meshHeight);\n      gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, self.indexBuffer);\n      gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, indices, gl.STATIC_DRAW);\n      self.indexCount = indices.length;\n    }\n  });\n};\nCardboardDistorter.prototype.computeMeshVertices_ = function (width, height, deviceInfo) {\n  var vertices = new Float32Array(2 * width * height * 5);\n  var lensFrustum = deviceInfo.getLeftEyeVisibleTanAngles();\n  var noLensFrustum = deviceInfo.getLeftEyeNoLensTanAngles();\n  var viewport = deviceInfo.getLeftEyeVisibleScreenRect(noLensFrustum);\n  var vidx = 0;\n  for (var e = 0; e < 2; e++) {\n    for (var j = 0; j < height; j++) {\n      for (var i = 0; i < width; i++, vidx++) {\n        var u = i / (width - 1);\n        var v = j / (height - 1);\n        var s = u;\n        var t = v;\n        var x = lerp(lensFrustum[0], lensFrustum[2], u);\n        var y = lerp(lensFrustum[3], lensFrustum[1], v);\n        var d = Math.sqrt(x * x + y * y);\n        var r = deviceInfo.distortion.distortInverse(d);\n        var p = x * r / d;\n        var q = y * r / d;\n        u = (p - noLensFrustum[0]) / (noLensFrustum[2] - noLensFrustum[0]);\n        v = (q - noLensFrustum[3]) / (noLensFrustum[1] - noLensFrustum[3]);\n        u = (viewport.x + u * viewport.width - 0.5) * 2.0;\n        v = (viewport.y + v * viewport.height - 0.5) * 2.0;\n        vertices[vidx * 5 + 0] = u;\n        vertices[vidx * 5 + 1] = v;\n        vertices[vidx * 5 + 2] = s;\n        vertices[vidx * 5 + 3] = t;\n        vertices[vidx * 5 + 4] = e;\n      }\n    }\n    var w = lensFrustum[2] - lensFrustum[0];\n    lensFrustum[0] = -(w + lensFrustum[0]);\n    lensFrustum[2] = w - lensFrustum[2];\n    w = noLensFrustum[2] - noLensFrustum[0];\n    noLensFrustum[0] = -(w + noLensFrustum[0]);\n    noLensFrustum[2] = w - noLensFrustum[2];\n    viewport.x = 1 - (viewport.x + viewport.width);\n  }\n  return vertices;\n};\nCardboardDistorter.prototype.computeMeshIndices_ = function (width, height) {\n  var indices = new Uint16Array(2 * (width - 1) * (height - 1) * 6);\n  var halfwidth = width / 2;\n  var halfheight = height / 2;\n  var vidx = 0;\n  var iidx = 0;\n  for (var e = 0; e < 2; e++) {\n    for (var j = 0; j < height; j++) {\n      for (var i = 0; i < width; i++, vidx++) {\n        if (i == 0 || j == 0) continue;\n        if (i <= halfwidth == j <= halfheight) {\n          indices[iidx++] = vidx;\n          indices[iidx++] = vidx - width - 1;\n          indices[iidx++] = vidx - width;\n          indices[iidx++] = vidx - width - 1;\n          indices[iidx++] = vidx;\n          indices[iidx++] = vidx - 1;\n        } else {\n          indices[iidx++] = vidx - 1;\n          indices[iidx++] = vidx - width;\n          indices[iidx++] = vidx;\n          indices[iidx++] = vidx - width;\n          indices[iidx++] = vidx - 1;\n          indices[iidx++] = vidx - width - 1;\n        }\n      }\n    }\n  }\n  return indices;\n};\nCardboardDistorter.prototype.getOwnPropertyDescriptor_ = function (proto, attrName) {\n  var descriptor = Object.getOwnPropertyDescriptor(proto, attrName);\n  if (descriptor.get === undefined || descriptor.set === undefined) {\n    descriptor.configurable = true;\n    descriptor.enumerable = true;\n    descriptor.get = function () {\n      return this.getAttribute(attrName);\n    };\n    descriptor.set = function (val) {\n      this.setAttribute(attrName, val);\n    };\n  }\n  return descriptor;\n};\nvar uiVS = ['attribute vec2 position;', 'uniform mat4 projectionMat;', 'void main() {', '  gl_Position = projectionMat * vec4( position, -1.0, 1.0 );', '}'].join('\\n');\nvar uiFS = ['precision mediump float;', 'uniform vec4 color;', 'void main() {', '  gl_FragColor = color;', '}'].join('\\n');\nvar DEG2RAD = Math.PI / 180.0;\nvar kAnglePerGearSection = 60;\nvar kOuterRimEndAngle = 12;\nvar kInnerRimBeginAngle = 20;\nvar kOuterRadius = 1;\nvar kMiddleRadius = 0.75;\nvar kInnerRadius = 0.3125;\nvar kCenterLineThicknessDp = 4;\nvar kButtonWidthDp = 28;\nvar kTouchSlopFactor = 1.5;\nfunction CardboardUI(gl) {\n  this.gl = gl;\n  this.attribs = {\n    position: 0\n  };\n  this.program = linkProgram(gl, uiVS, uiFS, this.attribs);\n  this.uniforms = getProgramUniforms(gl, this.program);\n  this.vertexBuffer = gl.createBuffer();\n  this.gearOffset = 0;\n  this.gearVertexCount = 0;\n  this.arrowOffset = 0;\n  this.arrowVertexCount = 0;\n  this.projMat = new Float32Array(16);\n  this.listener = null;\n  this.onResize();\n}\nCardboardUI.prototype.destroy = function () {\n  var gl = this.gl;\n  if (this.listener) {\n    gl.canvas.removeEventListener('click', this.listener, false);\n  }\n  gl.deleteProgram(this.program);\n  gl.deleteBuffer(this.vertexBuffer);\n};\nCardboardUI.prototype.listen = function (optionsCallback, backCallback) {\n  var canvas = this.gl.canvas;\n  this.listener = function (event) {\n    var midline = canvas.clientWidth / 2;\n    var buttonSize = kButtonWidthDp * kTouchSlopFactor;\n    if (event.clientX > midline - buttonSize && event.clientX < midline + buttonSize && event.clientY > canvas.clientHeight - buttonSize) {\n      optionsCallback(event);\n    }\n    else if (event.clientX < buttonSize && event.clientY < buttonSize) {\n        backCallback(event);\n      }\n  };\n  canvas.addEventListener('click', this.listener, false);\n};\nCardboardUI.prototype.onResize = function () {\n  var gl = this.gl;\n  var self = this;\n  var glState = [gl.ARRAY_BUFFER_BINDING];\n  glPreserveState(gl, glState, function (gl) {\n    var vertices = [];\n    var midline = gl.drawingBufferWidth / 2;\n    var physicalPixels = Math.max(screen.width, screen.height) * window.devicePixelRatio;\n    var scalingRatio = gl.drawingBufferWidth / physicalPixels;\n    var dps = scalingRatio * window.devicePixelRatio;\n    var lineWidth = kCenterLineThicknessDp * dps / 2;\n    var buttonSize = kButtonWidthDp * kTouchSlopFactor * dps;\n    var buttonScale = kButtonWidthDp * dps / 2;\n    var buttonBorder = (kButtonWidthDp * kTouchSlopFactor - kButtonWidthDp) * dps;\n    vertices.push(midline - lineWidth, buttonSize);\n    vertices.push(midline - lineWidth, gl.drawingBufferHeight);\n    vertices.push(midline + lineWidth, buttonSize);\n    vertices.push(midline + lineWidth, gl.drawingBufferHeight);\n    self.gearOffset = vertices.length / 2;\n    function addGearSegment(theta, r) {\n      var angle = (90 - theta) * DEG2RAD;\n      var x = Math.cos(angle);\n      var y = Math.sin(angle);\n      vertices.push(kInnerRadius * x * buttonScale + midline, kInnerRadius * y * buttonScale + buttonScale);\n      vertices.push(r * x * buttonScale + midline, r * y * buttonScale + buttonScale);\n    }\n    for (var i = 0; i <= 6; i++) {\n      var segmentTheta = i * kAnglePerGearSection;\n      addGearSegment(segmentTheta, kOuterRadius);\n      addGearSegment(segmentTheta + kOuterRimEndAngle, kOuterRadius);\n      addGearSegment(segmentTheta + kInnerRimBeginAngle, kMiddleRadius);\n      addGearSegment(segmentTheta + (kAnglePerGearSection - kInnerRimBeginAngle), kMiddleRadius);\n      addGearSegment(segmentTheta + (kAnglePerGearSection - kOuterRimEndAngle), kOuterRadius);\n    }\n    self.gearVertexCount = vertices.length / 2 - self.gearOffset;\n    self.arrowOffset = vertices.length / 2;\n    function addArrowVertex(x, y) {\n      vertices.push(buttonBorder + x, gl.drawingBufferHeight - buttonBorder - y);\n    }\n    var angledLineWidth = lineWidth / Math.sin(45 * DEG2RAD);\n    addArrowVertex(0, buttonScale);\n    addArrowVertex(buttonScale, 0);\n    addArrowVertex(buttonScale + angledLineWidth, angledLineWidth);\n    addArrowVertex(angledLineWidth, buttonScale + angledLineWidth);\n    addArrowVertex(angledLineWidth, buttonScale - angledLineWidth);\n    addArrowVertex(0, buttonScale);\n    addArrowVertex(buttonScale, buttonScale * 2);\n    addArrowVertex(buttonScale + angledLineWidth, buttonScale * 2 - angledLineWidth);\n    addArrowVertex(angledLineWidth, buttonScale - angledLineWidth);\n    addArrowVertex(0, buttonScale);\n    addArrowVertex(angledLineWidth, buttonScale - lineWidth);\n    addArrowVertex(kButtonWidthDp * dps, buttonScale - lineWidth);\n    addArrowVertex(angledLineWidth, buttonScale + lineWidth);\n    addArrowVertex(kButtonWidthDp * dps, buttonScale + lineWidth);\n    self.arrowVertexCount = vertices.length / 2 - self.arrowOffset;\n    gl.bindBuffer(gl.ARRAY_BUFFER, self.vertexBuffer);\n    gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(vertices), gl.STATIC_DRAW);\n  });\n};\nCardboardUI.prototype.render = function () {\n  var gl = this.gl;\n  var self = this;\n  var glState = [gl.CULL_FACE, gl.DEPTH_TEST, gl.BLEND, gl.SCISSOR_TEST, gl.STENCIL_TEST, gl.COLOR_WRITEMASK, gl.VIEWPORT, gl.CURRENT_PROGRAM, gl.ARRAY_BUFFER_BINDING];\n  glPreserveState(gl, glState, function (gl) {\n    gl.disable(gl.CULL_FACE);\n    gl.disable(gl.DEPTH_TEST);\n    gl.disable(gl.BLEND);\n    gl.disable(gl.SCISSOR_TEST);\n    gl.disable(gl.STENCIL_TEST);\n    gl.colorMask(true, true, true, true);\n    gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight);\n    self.renderNoState();\n  });\n};\nCardboardUI.prototype.renderNoState = function () {\n  var gl = this.gl;\n  gl.useProgram(this.program);\n  gl.bindBuffer(gl.ARRAY_BUFFER, this.vertexBuffer);\n  gl.enableVertexAttribArray(this.attribs.position);\n  gl.vertexAttribPointer(this.attribs.position, 2, gl.FLOAT, false, 8, 0);\n  gl.uniform4f(this.uniforms.color, 1.0, 1.0, 1.0, 1.0);\n  orthoMatrix(this.projMat, 0, gl.drawingBufferWidth, 0, gl.drawingBufferHeight, 0.1, 1024.0);\n  gl.uniformMatrix4fv(this.uniforms.projectionMat, false, this.projMat);\n  gl.drawArrays(gl.TRIANGLE_STRIP, 0, 4);\n  gl.drawArrays(gl.TRIANGLE_STRIP, this.gearOffset, this.gearVertexCount);\n  gl.drawArrays(gl.TRIANGLE_STRIP, this.arrowOffset, this.arrowVertexCount);\n};\nfunction Distortion(coefficients) {\n  this.coefficients = coefficients;\n}\nDistortion.prototype.distortInverse = function (radius) {\n  var r0 = 0;\n  var r1 = 1;\n  var dr0 = radius - this.distort(r0);\n  while (Math.abs(r1 - r0) > 0.0001             ) {\n    var dr1 = radius - this.distort(r1);\n    var r2 = r1 - dr1 * ((r1 - r0) / (dr1 - dr0));\n    r0 = r1;\n    r1 = r2;\n    dr0 = dr1;\n  }\n  return r1;\n};\nDistortion.prototype.distort = function (radius) {\n  var r2 = radius * radius;\n  var ret = 0;\n  for (var i = 0; i < this.coefficients.length; i++) {\n    ret = r2 * (ret + this.coefficients[i]);\n  }\n  return (ret + 1) * radius;\n};\nvar degToRad = Math.PI / 180;\nvar radToDeg = 180 / Math.PI;\nvar Vector3 = function Vector3(x, y, z) {\n  this.x = x || 0;\n  this.y = y || 0;\n  this.z = z || 0;\n};\nVector3.prototype = {\n  constructor: Vector3,\n  set: function set(x, y, z) {\n    this.x = x;\n    this.y = y;\n    this.z = z;\n    return this;\n  },\n  copy: function copy(v) {\n    this.x = v.x;\n    this.y = v.y;\n    this.z = v.z;\n    return this;\n  },\n  length: function length() {\n    return Math.sqrt(this.x * this.x + this.y * this.y + this.z * this.z);\n  },\n  normalize: function normalize() {\n    var scalar = this.length();\n    if (scalar !== 0) {\n      var invScalar = 1 / scalar;\n      this.multiplyScalar(invScalar);\n    } else {\n      this.x = 0;\n      this.y = 0;\n      this.z = 0;\n    }\n    return this;\n  },\n  multiplyScalar: function multiplyScalar(scalar) {\n    this.x *= scalar;\n    this.y *= scalar;\n    this.z *= scalar;\n  },\n  applyQuaternion: function applyQuaternion(q) {\n    var x = this.x;\n    var y = this.y;\n    var z = this.z;\n    var qx = q.x;\n    var qy = q.y;\n    var qz = q.z;\n    var qw = q.w;\n    var ix = qw * x + qy * z - qz * y;\n    var iy = qw * y + qz * x - qx * z;\n    var iz = qw * z + qx * y - qy * x;\n    var iw = -qx * x - qy * y - qz * z;\n    this.x = ix * qw + iw * -qx + iy * -qz - iz * -qy;\n    this.y = iy * qw + iw * -qy + iz * -qx - ix * -qz;\n    this.z = iz * qw + iw * -qz + ix * -qy - iy * -qx;\n    return this;\n  },\n  dot: function dot(v) {\n    return this.x * v.x + this.y * v.y + this.z * v.z;\n  },\n  crossVectors: function crossVectors(a, b) {\n    var ax = a.x,\n        ay = a.y,\n        az = a.z;\n    var bx = b.x,\n        by = b.y,\n        bz = b.z;\n    this.x = ay * bz - az * by;\n    this.y = az * bx - ax * bz;\n    this.z = ax * by - ay * bx;\n    return this;\n  }\n};\nvar Quaternion = function Quaternion(x, y, z, w) {\n  this.x = x || 0;\n  this.y = y || 0;\n  this.z = z || 0;\n  this.w = w !== undefined ? w : 1;\n};\nQuaternion.prototype = {\n  constructor: Quaternion,\n  set: function set(x, y, z, w) {\n    this.x = x;\n    this.y = y;\n    this.z = z;\n    this.w = w;\n    return this;\n  },\n  copy: function copy(quaternion) {\n    this.x = quaternion.x;\n    this.y = quaternion.y;\n    this.z = quaternion.z;\n    this.w = quaternion.w;\n    return this;\n  },\n  setFromEulerXYZ: function setFromEulerXYZ(x, y, z) {\n    var c1 = Math.cos(x / 2);\n    var c2 = Math.cos(y / 2);\n    var c3 = Math.cos(z / 2);\n    var s1 = Math.sin(x / 2);\n    var s2 = Math.sin(y / 2);\n    var s3 = Math.sin(z / 2);\n    this.x = s1 * c2 * c3 + c1 * s2 * s3;\n    this.y = c1 * s2 * c3 - s1 * c2 * s3;\n    this.z = c1 * c2 * s3 + s1 * s2 * c3;\n    this.w = c1 * c2 * c3 - s1 * s2 * s3;\n    return this;\n  },\n  setFromEulerYXZ: function setFromEulerYXZ(x, y, z) {\n    var c1 = Math.cos(x / 2);\n    var c2 = Math.cos(y / 2);\n    var c3 = Math.cos(z / 2);\n    var s1 = Math.sin(x / 2);\n    var s2 = Math.sin(y / 2);\n    var s3 = Math.sin(z / 2);\n    this.x = s1 * c2 * c3 + c1 * s2 * s3;\n    this.y = c1 * s2 * c3 - s1 * c2 * s3;\n    this.z = c1 * c2 * s3 - s1 * s2 * c3;\n    this.w = c1 * c2 * c3 + s1 * s2 * s3;\n    return this;\n  },\n  setFromAxisAngle: function setFromAxisAngle(axis, angle) {\n    var halfAngle = angle / 2,\n        s = Math.sin(halfAngle);\n    this.x = axis.x * s;\n    this.y = axis.y * s;\n    this.z = axis.z * s;\n    this.w = Math.cos(halfAngle);\n    return this;\n  },\n  multiply: function multiply(q) {\n    return this.multiplyQuaternions(this, q);\n  },\n  multiplyQuaternions: function multiplyQuaternions(a, b) {\n    var qax = a.x,\n        qay = a.y,\n        qaz = a.z,\n        qaw = a.w;\n    var qbx = b.x,\n        qby = b.y,\n        qbz = b.z,\n        qbw = b.w;\n    this.x = qax * qbw + qaw * qbx + qay * qbz - qaz * qby;\n    this.y = qay * qbw + qaw * qby + qaz * qbx - qax * qbz;\n    this.z = qaz * qbw + qaw * qbz + qax * qby - qay * qbx;\n    this.w = qaw * qbw - qax * qbx - qay * qby - qaz * qbz;\n    return this;\n  },\n  inverse: function inverse() {\n    this.x *= -1;\n    this.y *= -1;\n    this.z *= -1;\n    this.normalize();\n    return this;\n  },\n  normalize: function normalize() {\n    var l = Math.sqrt(this.x * this.x + this.y * this.y + this.z * this.z + this.w * this.w);\n    if (l === 0) {\n      this.x = 0;\n      this.y = 0;\n      this.z = 0;\n      this.w = 1;\n    } else {\n      l = 1 / l;\n      this.x = this.x * l;\n      this.y = this.y * l;\n      this.z = this.z * l;\n      this.w = this.w * l;\n    }\n    return this;\n  },\n  slerp: function slerp(qb, t) {\n    if (t === 0) return this;\n    if (t === 1) return this.copy(qb);\n    var x = this.x,\n        y = this.y,\n        z = this.z,\n        w = this.w;\n    var cosHalfTheta = w * qb.w + x * qb.x + y * qb.y + z * qb.z;\n    if (cosHalfTheta < 0) {\n      this.w = -qb.w;\n      this.x = -qb.x;\n      this.y = -qb.y;\n      this.z = -qb.z;\n      cosHalfTheta = -cosHalfTheta;\n    } else {\n      this.copy(qb);\n    }\n    if (cosHalfTheta >= 1.0) {\n      this.w = w;\n      this.x = x;\n      this.y = y;\n      this.z = z;\n      return this;\n    }\n    var halfTheta = Math.acos(cosHalfTheta);\n    var sinHalfTheta = Math.sqrt(1.0 - cosHalfTheta * cosHalfTheta);\n    if (Math.abs(sinHalfTheta) < 0.001) {\n      this.w = 0.5 * (w + this.w);\n      this.x = 0.5 * (x + this.x);\n      this.y = 0.5 * (y + this.y);\n      this.z = 0.5 * (z + this.z);\n      return this;\n    }\n    var ratioA = Math.sin((1 - t) * halfTheta) / sinHalfTheta,\n        ratioB = Math.sin(t * halfTheta) / sinHalfTheta;\n    this.w = w * ratioA + this.w * ratioB;\n    this.x = x * ratioA + this.x * ratioB;\n    this.y = y * ratioA + this.y * ratioB;\n    this.z = z * ratioA + this.z * ratioB;\n    return this;\n  },\n  setFromUnitVectors: function () {\n    var v1, r;\n    var EPS = 0.000001;\n    return function (vFrom, vTo) {\n      if (v1 === undefined) v1 = new Vector3();\n      r = vFrom.dot(vTo) + 1;\n      if (r < EPS) {\n        r = 0;\n        if (Math.abs(vFrom.x) > Math.abs(vFrom.z)) {\n          v1.set(-vFrom.y, vFrom.x, 0);\n        } else {\n          v1.set(0, -vFrom.z, vFrom.y);\n        }\n      } else {\n        v1.crossVectors(vFrom, vTo);\n      }\n      this.x = v1.x;\n      this.y = v1.y;\n      this.z = v1.z;\n      this.w = r;\n      this.normalize();\n      return this;\n    };\n  }()\n};\nfunction Device(params) {\n  this.width = params.width || getScreenWidth();\n  this.height = params.height || getScreenHeight();\n  this.widthMeters = params.widthMeters;\n  this.heightMeters = params.heightMeters;\n  this.bevelMeters = params.bevelMeters;\n}\nvar DEFAULT_ANDROID = new Device({\n  widthMeters: 0.110,\n  heightMeters: 0.062,\n  bevelMeters: 0.004\n});\nvar DEFAULT_IOS = new Device({\n  widthMeters: 0.1038,\n  heightMeters: 0.0584,\n  bevelMeters: 0.004\n});\nvar Viewers = {\n  CardboardV1: new CardboardViewer({\n    id: 'CardboardV1',\n    label: 'Cardboard I/O 2014',\n    fov: 40,\n    interLensDistance: 0.060,\n    baselineLensDistance: 0.035,\n    screenLensDistance: 0.042,\n    distortionCoefficients: [0.441, 0.156],\n    inverseCoefficients: [-0.4410035, 0.42756155, -0.4804439, 0.5460139, -0.58821183, 0.5733938, -0.48303202, 0.33299083, -0.17573841, 0.0651772, -0.01488963, 0.001559834]\n  }),\n  CardboardV2: new CardboardViewer({\n    id: 'CardboardV2',\n    label: 'Cardboard I/O 2015',\n    fov: 60,\n    interLensDistance: 0.064,\n    baselineLensDistance: 0.035,\n    screenLensDistance: 0.039,\n    distortionCoefficients: [0.34, 0.55],\n    inverseCoefficients: [-0.33836704, -0.18162185, 0.862655, -1.2462051, 1.0560602, -0.58208317, 0.21609078, -0.05444823, 0.009177956, -9.904169E-4, 6.183535E-5, -1.6981803E-6]\n  })\n};\nfunction DeviceInfo(deviceParams, additionalViewers) {\n  this.viewer = Viewers.CardboardV2;\n  this.updateDeviceParams(deviceParams);\n  this.distortion = new Distortion(this.viewer.distortionCoefficients);\n  for (var i = 0; i < additionalViewers.length; i++) {\n    var viewer = additionalViewers[i];\n    Viewers[viewer.id] = new CardboardViewer(viewer);\n  }\n}\nDeviceInfo.prototype.updateDeviceParams = function (deviceParams) {\n  this.device = this.determineDevice_(deviceParams) || this.device;\n};\nDeviceInfo.prototype.getDevice = function () {\n  return this.device;\n};\nDeviceInfo.prototype.setViewer = function (viewer) {\n  this.viewer = viewer;\n  this.distortion = new Distortion(this.viewer.distortionCoefficients);\n};\nDeviceInfo.prototype.determineDevice_ = function (deviceParams) {\n  if (!deviceParams) {\n    if (isIOS()) {\n      console.warn('Using fallback iOS device measurements.');\n      return DEFAULT_IOS;\n    } else {\n      console.warn('Using fallback Android device measurements.');\n      return DEFAULT_ANDROID;\n    }\n  }\n  var METERS_PER_INCH = 0.0254;\n  var metersPerPixelX = METERS_PER_INCH / deviceParams.xdpi;\n  var metersPerPixelY = METERS_PER_INCH / deviceParams.ydpi;\n  var width = getScreenWidth();\n  var height = getScreenHeight();\n  return new Device({\n    widthMeters: metersPerPixelX * width,\n    heightMeters: metersPerPixelY * height,\n    bevelMeters: deviceParams.bevelMm * 0.001\n  });\n};\nDeviceInfo.prototype.getDistortedFieldOfViewLeftEye = function () {\n  var viewer = this.viewer;\n  var device = this.device;\n  var distortion = this.distortion;\n  var eyeToScreenDistance = viewer.screenLensDistance;\n  var outerDist = (device.widthMeters - viewer.interLensDistance) / 2;\n  var innerDist = viewer.interLensDistance / 2;\n  var bottomDist = viewer.baselineLensDistance - device.bevelMeters;\n  var topDist = device.heightMeters - bottomDist;\n  var outerAngle = radToDeg * Math.atan(distortion.distort(outerDist / eyeToScreenDistance));\n  var innerAngle = radToDeg * Math.atan(distortion.distort(innerDist / eyeToScreenDistance));\n  var bottomAngle = radToDeg * Math.atan(distortion.distort(bottomDist / eyeToScreenDistance));\n  var topAngle = radToDeg * Math.atan(distortion.distort(topDist / eyeToScreenDistance));\n  return {\n    leftDegrees: Math.min(outerAngle, viewer.fov),\n    rightDegrees: Math.min(innerAngle, viewer.fov),\n    downDegrees: Math.min(bottomAngle, viewer.fov),\n    upDegrees: Math.min(topAngle, viewer.fov)\n  };\n};\nDeviceInfo.prototype.getLeftEyeVisibleTanAngles = function () {\n  var viewer = this.viewer;\n  var device = this.device;\n  var distortion = this.distortion;\n  var fovLeft = Math.tan(-degToRad * viewer.fov);\n  var fovTop = Math.tan(degToRad * viewer.fov);\n  var fovRight = Math.tan(degToRad * viewer.fov);\n  var fovBottom = Math.tan(-degToRad * viewer.fov);\n  var halfWidth = device.widthMeters / 4;\n  var halfHeight = device.heightMeters / 2;\n  var verticalLensOffset = viewer.baselineLensDistance - device.bevelMeters - halfHeight;\n  var centerX = viewer.interLensDistance / 2 - halfWidth;\n  var centerY = -verticalLensOffset;\n  var centerZ = viewer.screenLensDistance;\n  var screenLeft = distortion.distort((centerX - halfWidth) / centerZ);\n  var screenTop = distortion.distort((centerY + halfHeight) / centerZ);\n  var screenRight = distortion.distort((centerX + halfWidth) / centerZ);\n  var screenBottom = distortion.distort((centerY - halfHeight) / centerZ);\n  var result = new Float32Array(4);\n  result[0] = Math.max(fovLeft, screenLeft);\n  result[1] = Math.min(fovTop, screenTop);\n  result[2] = Math.min(fovRight, screenRight);\n  result[3] = Math.max(fovBottom, screenBottom);\n  return result;\n};\nDeviceInfo.prototype.getLeftEyeNoLensTanAngles = function () {\n  var viewer = this.viewer;\n  var device = this.device;\n  var distortion = this.distortion;\n  var result = new Float32Array(4);\n  var fovLeft = distortion.distortInverse(Math.tan(-degToRad * viewer.fov));\n  var fovTop = distortion.distortInverse(Math.tan(degToRad * viewer.fov));\n  var fovRight = distortion.distortInverse(Math.tan(degToRad * viewer.fov));\n  var fovBottom = distortion.distortInverse(Math.tan(-degToRad * viewer.fov));\n  var halfWidth = device.widthMeters / 4;\n  var halfHeight = device.heightMeters / 2;\n  var verticalLensOffset = viewer.baselineLensDistance - device.bevelMeters - halfHeight;\n  var centerX = viewer.interLensDistance / 2 - halfWidth;\n  var centerY = -verticalLensOffset;\n  var centerZ = viewer.screenLensDistance;\n  var screenLeft = (centerX - halfWidth) / centerZ;\n  var screenTop = (centerY + halfHeight) / centerZ;\n  var screenRight = (centerX + halfWidth) / centerZ;\n  var screenBottom = (centerY - halfHeight) / centerZ;\n  result[0] = Math.max(fovLeft, screenLeft);\n  result[1] = Math.min(fovTop, screenTop);\n  result[2] = Math.min(fovRight, screenRight);\n  result[3] = Math.max(fovBottom, screenBottom);\n  return result;\n};\nDeviceInfo.prototype.getLeftEyeVisibleScreenRect = function (undistortedFrustum) {\n  var viewer = this.viewer;\n  var device = this.device;\n  var dist = viewer.screenLensDistance;\n  var eyeX = (device.widthMeters - viewer.interLensDistance) / 2;\n  var eyeY = viewer.baselineLensDistance - device.bevelMeters;\n  var left = (undistortedFrustum[0] * dist + eyeX) / device.widthMeters;\n  var top = (undistortedFrustum[1] * dist + eyeY) / device.heightMeters;\n  var right = (undistortedFrustum[2] * dist + eyeX) / device.widthMeters;\n  var bottom = (undistortedFrustum[3] * dist + eyeY) / device.heightMeters;\n  return {\n    x: left,\n    y: bottom,\n    width: right - left,\n    height: top - bottom\n  };\n};\nDeviceInfo.prototype.getFieldOfViewLeftEye = function (opt_isUndistorted) {\n  return opt_isUndistorted ? this.getUndistortedFieldOfViewLeftEye() : this.getDistortedFieldOfViewLeftEye();\n};\nDeviceInfo.prototype.getFieldOfViewRightEye = function (opt_isUndistorted) {\n  var fov = this.getFieldOfViewLeftEye(opt_isUndistorted);\n  return {\n    leftDegrees: fov.rightDegrees,\n    rightDegrees: fov.leftDegrees,\n    upDegrees: fov.upDegrees,\n    downDegrees: fov.downDegrees\n  };\n};\nDeviceInfo.prototype.getUndistortedFieldOfViewLeftEye = function () {\n  var p = this.getUndistortedParams_();\n  return {\n    leftDegrees: radToDeg * Math.atan(p.outerDist),\n    rightDegrees: radToDeg * Math.atan(p.innerDist),\n    downDegrees: radToDeg * Math.atan(p.bottomDist),\n    upDegrees: radToDeg * Math.atan(p.topDist)\n  };\n};\nDeviceInfo.prototype.getUndistortedViewportLeftEye = function () {\n  var p = this.getUndistortedParams_();\n  var viewer = this.viewer;\n  var device = this.device;\n  var eyeToScreenDistance = viewer.screenLensDistance;\n  var screenWidth = device.widthMeters / eyeToScreenDistance;\n  var screenHeight = device.heightMeters / eyeToScreenDistance;\n  var xPxPerTanAngle = device.width / screenWidth;\n  var yPxPerTanAngle = device.height / screenHeight;\n  var x = Math.round((p.eyePosX - p.outerDist) * xPxPerTanAngle);\n  var y = Math.round((p.eyePosY - p.bottomDist) * yPxPerTanAngle);\n  return {\n    x: x,\n    y: y,\n    width: Math.round((p.eyePosX + p.innerDist) * xPxPerTanAngle) - x,\n    height: Math.round((p.eyePosY + p.topDist) * yPxPerTanAngle) - y\n  };\n};\nDeviceInfo.prototype.getUndistortedParams_ = function () {\n  var viewer = this.viewer;\n  var device = this.device;\n  var distortion = this.distortion;\n  var eyeToScreenDistance = viewer.screenLensDistance;\n  var halfLensDistance = viewer.interLensDistance / 2 / eyeToScreenDistance;\n  var screenWidth = device.widthMeters / eyeToScreenDistance;\n  var screenHeight = device.heightMeters / eyeToScreenDistance;\n  var eyePosX = screenWidth / 2 - halfLensDistance;\n  var eyePosY = (viewer.baselineLensDistance - device.bevelMeters) / eyeToScreenDistance;\n  var maxFov = viewer.fov;\n  var viewerMax = distortion.distortInverse(Math.tan(degToRad * maxFov));\n  var outerDist = Math.min(eyePosX, viewerMax);\n  var innerDist = Math.min(halfLensDistance, viewerMax);\n  var bottomDist = Math.min(eyePosY, viewerMax);\n  var topDist = Math.min(screenHeight - eyePosY, viewerMax);\n  return {\n    outerDist: outerDist,\n    innerDist: innerDist,\n    topDist: topDist,\n    bottomDist: bottomDist,\n    eyePosX: eyePosX,\n    eyePosY: eyePosY\n  };\n};\nfunction CardboardViewer(params) {\n  this.id = params.id;\n  this.label = params.label;\n  this.fov = params.fov;\n  this.interLensDistance = params.interLensDistance;\n  this.baselineLensDistance = params.baselineLensDistance;\n  this.screenLensDistance = params.screenLensDistance;\n  this.distortionCoefficients = params.distortionCoefficients;\n  this.inverseCoefficients = params.inverseCoefficients;\n}\nDeviceInfo.Viewers = Viewers;\nvar format = 1;\nvar last_updated = \"2019-11-09T17:36:14Z\";\nvar devices = [{\"type\":\"android\",\"rules\":[{\"mdmh\":\"asus/*/Nexus 7/*\"},{\"ua\":\"Nexus 7\"}],\"dpi\":[320.8,323],\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"asus/*/ASUS_X00PD/*\"},{\"ua\":\"ASUS_X00PD\"}],\"dpi\":245,\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"asus/*/ASUS_X008D/*\"},{\"ua\":\"ASUS_X008D\"}],\"dpi\":282,\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"asus/*/ASUS_Z00AD/*\"},{\"ua\":\"ASUS_Z00AD\"}],\"dpi\":[403,404.6],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"Google/*/Pixel 2 XL/*\"},{\"ua\":\"Pixel 2 XL\"}],\"dpi\":537.9,\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"Google/*/Pixel 3 XL/*\"},{\"ua\":\"Pixel 3 XL\"}],\"dpi\":[558.5,553.8],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"Google/*/Pixel XL/*\"},{\"ua\":\"Pixel XL\"}],\"dpi\":[537.9,533],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"Google/*/Pixel 3/*\"},{\"ua\":\"Pixel 3\"}],\"dpi\":442.4,\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"Google/*/Pixel 2/*\"},{\"ua\":\"Pixel 2\"}],\"dpi\":441,\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"Google/*/Pixel/*\"},{\"ua\":\"Pixel\"}],\"dpi\":[432.6,436.7],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"HTC/*/HTC6435LVW/*\"},{\"ua\":\"HTC6435LVW\"}],\"dpi\":[449.7,443.3],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"HTC/*/HTC One XL/*\"},{\"ua\":\"HTC One XL\"}],\"dpi\":[315.3,314.6],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"htc/*/Nexus 9/*\"},{\"ua\":\"Nexus 9\"}],\"dpi\":289,\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"HTC/*/HTC One M9/*\"},{\"ua\":\"HTC One M9\"}],\"dpi\":[442.5,443.3],\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"HTC/*/HTC One_M8/*\"},{\"ua\":\"HTC One_M8\"}],\"dpi\":[449.7,447.4],\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"HTC/*/HTC One/*\"},{\"ua\":\"HTC One\"}],\"dpi\":472.8,\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"Huawei/*/Nexus 6P/*\"},{\"ua\":\"Nexus 6P\"}],\"dpi\":[515.1,518],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"Huawei/*/BLN-L24/*\"},{\"ua\":\"HONORBLN-L24\"}],\"dpi\":480,\"bw\":4,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"Huawei/*/BKL-L09/*\"},{\"ua\":\"BKL-L09\"}],\"dpi\":403,\"bw\":3.47,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"LENOVO/*/Lenovo PB2-690Y/*\"},{\"ua\":\"Lenovo PB2-690Y\"}],\"dpi\":[457.2,454.713],\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"LGE/*/Nexus 5X/*\"},{\"ua\":\"Nexus 5X\"}],\"dpi\":[422,419.9],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"LGE/*/LGMS345/*\"},{\"ua\":\"LGMS345\"}],\"dpi\":[221.7,219.1],\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"LGE/*/LG-D800/*\"},{\"ua\":\"LG-D800\"}],\"dpi\":[422,424.1],\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"LGE/*/LG-D850/*\"},{\"ua\":\"LG-D850\"}],\"dpi\":[537.9,541.9],\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"LGE/*/VS985 4G/*\"},{\"ua\":\"VS985 4G\"}],\"dpi\":[537.9,535.6],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"LGE/*/Nexus 5/*\"},{\"ua\":\"Nexus 5 B\"}],\"dpi\":[442.4,444.8],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"LGE/*/Nexus 4/*\"},{\"ua\":\"Nexus 4\"}],\"dpi\":[319.8,318.4],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"LGE/*/LG-P769/*\"},{\"ua\":\"LG-P769\"}],\"dpi\":[240.6,247.5],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"LGE/*/LGMS323/*\"},{\"ua\":\"LGMS323\"}],\"dpi\":[206.6,204.6],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"LGE/*/LGLS996/*\"},{\"ua\":\"LGLS996\"}],\"dpi\":[403.4,401.5],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"Micromax/*/4560MMX/*\"},{\"ua\":\"4560MMX\"}],\"dpi\":[240,219.4],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"Micromax/*/A250/*\"},{\"ua\":\"Micromax A250\"}],\"dpi\":[480,446.4],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"Micromax/*/Micromax AQ4501/*\"},{\"ua\":\"Micromax AQ4501\"}],\"dpi\":240,\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"motorola/*/G5/*\"},{\"ua\":\"Moto G (5) Plus\"}],\"dpi\":[403.4,403],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"motorola/*/DROID RAZR/*\"},{\"ua\":\"DROID RAZR\"}],\"dpi\":[368.1,256.7],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"motorola/*/XT830C/*\"},{\"ua\":\"XT830C\"}],\"dpi\":[254,255.9],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"motorola/*/XT1021/*\"},{\"ua\":\"XT1021\"}],\"dpi\":[254,256.7],\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"motorola/*/XT1023/*\"},{\"ua\":\"XT1023\"}],\"dpi\":[254,256.7],\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"motorola/*/XT1028/*\"},{\"ua\":\"XT1028\"}],\"dpi\":[326.6,327.6],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"motorola/*/XT1034/*\"},{\"ua\":\"XT1034\"}],\"dpi\":[326.6,328.4],\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"motorola/*/XT1053/*\"},{\"ua\":\"XT1053\"}],\"dpi\":[315.3,316.1],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"motorola/*/XT1562/*\"},{\"ua\":\"XT1562\"}],\"dpi\":[403.4,402.7],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"motorola/*/Nexus 6/*\"},{\"ua\":\"Nexus 6 B\"}],\"dpi\":[494.3,489.7],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"motorola/*/XT1063/*\"},{\"ua\":\"XT1063\"}],\"dpi\":[295,296.6],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"motorola/*/XT1064/*\"},{\"ua\":\"XT1064\"}],\"dpi\":[295,295.6],\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"motorola/*/XT1092/*\"},{\"ua\":\"XT1092\"}],\"dpi\":[422,424.1],\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"motorola/*/XT1095/*\"},{\"ua\":\"XT1095\"}],\"dpi\":[422,423.4],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"motorola/*/G4/*\"},{\"ua\":\"Moto G (4)\"}],\"dpi\":401,\"bw\":4,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"OnePlus/*/A0001/*\"},{\"ua\":\"A0001\"}],\"dpi\":[403.4,401],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"OnePlus/*/ONE E1001/*\"},{\"ua\":\"ONE E1001\"}],\"dpi\":[442.4,441.4],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"OnePlus/*/ONE E1003/*\"},{\"ua\":\"ONE E1003\"}],\"dpi\":[442.4,441.4],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"OnePlus/*/ONE E1005/*\"},{\"ua\":\"ONE E1005\"}],\"dpi\":[442.4,441.4],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"OnePlus/*/ONE A2001/*\"},{\"ua\":\"ONE A2001\"}],\"dpi\":[391.9,405.4],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"OnePlus/*/ONE A2003/*\"},{\"ua\":\"ONE A2003\"}],\"dpi\":[391.9,405.4],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"OnePlus/*/ONE A2005/*\"},{\"ua\":\"ONE A2005\"}],\"dpi\":[391.9,405.4],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"OnePlus/*/ONEPLUS A3000/*\"},{\"ua\":\"ONEPLUS A3000\"}],\"dpi\":401,\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"OnePlus/*/ONEPLUS A3003/*\"},{\"ua\":\"ONEPLUS A3003\"}],\"dpi\":401,\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"OnePlus/*/ONEPLUS A3010/*\"},{\"ua\":\"ONEPLUS A3010\"}],\"dpi\":401,\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"OnePlus/*/ONEPLUS A5000/*\"},{\"ua\":\"ONEPLUS A5000 \"}],\"dpi\":[403.411,399.737],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"OnePlus/*/ONE A5010/*\"},{\"ua\":\"ONEPLUS A5010\"}],\"dpi\":[403,400],\"bw\":2,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"OnePlus/*/ONEPLUS A6000/*\"},{\"ua\":\"ONEPLUS A6000\"}],\"dpi\":401,\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"OnePlus/*/ONEPLUS A6003/*\"},{\"ua\":\"ONEPLUS A6003\"}],\"dpi\":401,\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"OnePlus/*/ONEPLUS A6010/*\"},{\"ua\":\"ONEPLUS A6010\"}],\"dpi\":401,\"bw\":2,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"OnePlus/*/ONEPLUS A6013/*\"},{\"ua\":\"ONEPLUS A6013\"}],\"dpi\":401,\"bw\":2,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"OPPO/*/X909/*\"},{\"ua\":\"X909\"}],\"dpi\":[442.4,444.1],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/GT-I9082/*\"},{\"ua\":\"GT-I9082\"}],\"dpi\":[184.7,185.4],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-G360P/*\"},{\"ua\":\"SM-G360P\"}],\"dpi\":[196.7,205.4],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/Nexus S/*\"},{\"ua\":\"Nexus S\"}],\"dpi\":[234.5,229.8],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/GT-I9300/*\"},{\"ua\":\"GT-I9300\"}],\"dpi\":[304.8,303.9],\"bw\":5,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-T230NU/*\"},{\"ua\":\"SM-T230NU\"}],\"dpi\":216,\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SGH-T399/*\"},{\"ua\":\"SGH-T399\"}],\"dpi\":[217.7,231.4],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SGH-M919/*\"},{\"ua\":\"SGH-M919\"}],\"dpi\":[440.8,437.7],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-N9005/*\"},{\"ua\":\"SM-N9005\"}],\"dpi\":[386.4,387],\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SAMSUNG-SM-N900A/*\"},{\"ua\":\"SAMSUNG-SM-N900A\"}],\"dpi\":[386.4,387.7],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/GT-I9500/*\"},{\"ua\":\"GT-I9500\"}],\"dpi\":[442.5,443.3],\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/GT-I9505/*\"},{\"ua\":\"GT-I9505\"}],\"dpi\":439.4,\"bw\":4,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-G900F/*\"},{\"ua\":\"SM-G900F\"}],\"dpi\":[415.6,431.6],\"bw\":5,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-G900M/*\"},{\"ua\":\"SM-G900M\"}],\"dpi\":[415.6,431.6],\"bw\":5,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-G800F/*\"},{\"ua\":\"SM-G800F\"}],\"dpi\":326.8,\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-G906S/*\"},{\"ua\":\"SM-G906S\"}],\"dpi\":[562.7,572.4],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/GT-I9300/*\"},{\"ua\":\"GT-I9300\"}],\"dpi\":[306.7,304.8],\"bw\":5,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-T535/*\"},{\"ua\":\"SM-T535\"}],\"dpi\":[142.6,136.4],\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-N920C/*\"},{\"ua\":\"SM-N920C\"}],\"dpi\":[515.1,518.4],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-N920P/*\"},{\"ua\":\"SM-N920P\"}],\"dpi\":[386.3655,390.144],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-N920W8/*\"},{\"ua\":\"SM-N920W8\"}],\"dpi\":[515.1,518.4],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/GT-I9300I/*\"},{\"ua\":\"GT-I9300I\"}],\"dpi\":[304.8,305.8],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/GT-I9195/*\"},{\"ua\":\"GT-I9195\"}],\"dpi\":[249.4,256.7],\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SPH-L520/*\"},{\"ua\":\"SPH-L520\"}],\"dpi\":[249.4,255.9],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SAMSUNG-SGH-I717/*\"},{\"ua\":\"SAMSUNG-SGH-I717\"}],\"dpi\":285.8,\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SPH-D710/*\"},{\"ua\":\"SPH-D710\"}],\"dpi\":[217.7,204.2],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/GT-N7100/*\"},{\"ua\":\"GT-N7100\"}],\"dpi\":265.1,\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SCH-I605/*\"},{\"ua\":\"SCH-I605\"}],\"dpi\":265.1,\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/Galaxy Nexus/*\"},{\"ua\":\"Galaxy Nexus\"}],\"dpi\":[315.3,314.2],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-N910H/*\"},{\"ua\":\"SM-N910H\"}],\"dpi\":[515.1,518],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-N910C/*\"},{\"ua\":\"SM-N910C\"}],\"dpi\":[515.2,520.2],\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-G130M/*\"},{\"ua\":\"SM-G130M\"}],\"dpi\":[165.9,164.8],\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-G928I/*\"},{\"ua\":\"SM-G928I\"}],\"dpi\":[515.1,518.4],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-G920F/*\"},{\"ua\":\"SM-G920F\"}],\"dpi\":580.6,\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-G920P/*\"},{\"ua\":\"SM-G920P\"}],\"dpi\":[522.5,577],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-G925F/*\"},{\"ua\":\"SM-G925F\"}],\"dpi\":580.6,\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-G925V/*\"},{\"ua\":\"SM-G925V\"}],\"dpi\":[522.5,576.6],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-G930F/*\"},{\"ua\":\"SM-G930F\"}],\"dpi\":576.6,\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-G935F/*\"},{\"ua\":\"SM-G935F\"}],\"dpi\":533,\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-G950F/*\"},{\"ua\":\"SM-G950F\"}],\"dpi\":[562.707,565.293],\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-G955U/*\"},{\"ua\":\"SM-G955U\"}],\"dpi\":[522.514,525.762],\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-G955F/*\"},{\"ua\":\"SM-G955F\"}],\"dpi\":[522.514,525.762],\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-G960F/*\"},{\"ua\":\"SM-G960F\"}],\"dpi\":[569.575,571.5],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-G9600/*\"},{\"ua\":\"SM-G9600\"}],\"dpi\":[569.575,571.5],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-G960T/*\"},{\"ua\":\"SM-G960T\"}],\"dpi\":[569.575,571.5],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-G960N/*\"},{\"ua\":\"SM-G960N\"}],\"dpi\":[569.575,571.5],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-G960U/*\"},{\"ua\":\"SM-G960U\"}],\"dpi\":[569.575,571.5],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-G9608/*\"},{\"ua\":\"SM-G9608\"}],\"dpi\":[569.575,571.5],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-G960FD/*\"},{\"ua\":\"SM-G960FD\"}],\"dpi\":[569.575,571.5],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-G960W/*\"},{\"ua\":\"SM-G960W\"}],\"dpi\":[569.575,571.5],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-G965F/*\"},{\"ua\":\"SM-G965F\"}],\"dpi\":529,\"bw\":2,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"Sony/*/C6903/*\"},{\"ua\":\"C6903\"}],\"dpi\":[442.5,443.3],\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"Sony/*/D6653/*\"},{\"ua\":\"D6653\"}],\"dpi\":[428.6,427.6],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"Sony/*/E6653/*\"},{\"ua\":\"E6653\"}],\"dpi\":[428.6,425.7],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"Sony/*/E6853/*\"},{\"ua\":\"E6853\"}],\"dpi\":[403.4,401.9],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"Sony/*/SGP321/*\"},{\"ua\":\"SGP321\"}],\"dpi\":[224.7,224.1],\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"TCT/*/ALCATEL ONE TOUCH Fierce/*\"},{\"ua\":\"ALCATEL ONE TOUCH Fierce\"}],\"dpi\":[240,247.5],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"THL/*/thl 5000/*\"},{\"ua\":\"thl 5000\"}],\"dpi\":[480,443.3],\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"Fly/*/IQ4412/*\"},{\"ua\":\"IQ4412\"}],\"dpi\":307.9,\"bw\":3,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"ZTE/*/ZTE Blade L2/*\"},{\"ua\":\"ZTE Blade L2\"}],\"dpi\":240,\"bw\":3,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"BENEVE/*/VR518/*\"},{\"ua\":\"VR518\"}],\"dpi\":480,\"bw\":3,\"ac\":500},{\"type\":\"ios\",\"rules\":[{\"res\":[640,960]}],\"dpi\":[325.1,328.4],\"bw\":4,\"ac\":1000},{\"type\":\"ios\",\"rules\":[{\"res\":[640,1136]}],\"dpi\":[317.1,320.2],\"bw\":3,\"ac\":1000},{\"type\":\"ios\",\"rules\":[{\"res\":[750,1334]}],\"dpi\":326.4,\"bw\":4,\"ac\":1000},{\"type\":\"ios\",\"rules\":[{\"res\":[1242,2208]}],\"dpi\":[453.6,458.4],\"bw\":4,\"ac\":1000},{\"type\":\"ios\",\"rules\":[{\"res\":[1125,2001]}],\"dpi\":[410.9,415.4],\"bw\":4,\"ac\":1000},{\"type\":\"ios\",\"rules\":[{\"res\":[1125,2436]}],\"dpi\":458,\"bw\":4,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"Huawei/*/EML-L29/*\"},{\"ua\":\"EML-L29\"}],\"dpi\":428,\"bw\":3.45,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"Nokia/*/Nokia 7.1/*\"},{\"ua\":\"Nokia 7.1\"}],\"dpi\":[432,431.9],\"bw\":3,\"ac\":500},{\"type\":\"ios\",\"rules\":[{\"res\":[1242,2688]}],\"dpi\":458,\"bw\":4,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-G570M/*\"},{\"ua\":\"SM-G570M\"}],\"dpi\":320,\"bw\":3.684,\"ac\":1000},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-G970F/*\"},{\"ua\":\"SM-G970F\"}],\"dpi\":438,\"bw\":2.281,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-G973F/*\"},{\"ua\":\"SM-G973F\"}],\"dpi\":550,\"bw\":2.002,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-G975F/*\"},{\"ua\":\"SM-G975F\"}],\"dpi\":522,\"bw\":2.054,\"ac\":500},{\"type\":\"android\",\"rules\":[{\"mdmh\":\"samsung/*/SM-G977F/*\"},{\"ua\":\"SM-G977F\"}],\"dpi\":505,\"bw\":2.334,\"ac\":500},{\"type\":\"ios\",\"rules\":[{\"res\":[828,1792]}],\"dpi\":326,\"bw\":5,\"ac\":500}];\nvar DPDB_CACHE = {\n\tformat: format,\n\tlast_updated: last_updated,\n\tdevices: devices\n};\nfunction Dpdb(url, onDeviceParamsUpdated) {\n  this.dpdb = DPDB_CACHE;\n  this.recalculateDeviceParams_();\n  if (url) {\n    this.onDeviceParamsUpdated = onDeviceParamsUpdated;\n    var xhr = new XMLHttpRequest();\n    var obj = this;\n    xhr.open('GET', url, true);\n    xhr.addEventListener('load', function () {\n      obj.loading = false;\n      if (xhr.status >= 200 && xhr.status <= 299) {\n        obj.dpdb = JSON.parse(xhr.response);\n        obj.recalculateDeviceParams_();\n      } else {\n        console.error('Error loading online DPDB!');\n      }\n    });\n    xhr.send();\n  }\n}\nDpdb.prototype.getDeviceParams = function () {\n  return this.deviceParams;\n};\nDpdb.prototype.recalculateDeviceParams_ = function () {\n  var newDeviceParams = this.calcDeviceParams_();\n  if (newDeviceParams) {\n    this.deviceParams = newDeviceParams;\n    if (this.onDeviceParamsUpdated) {\n      this.onDeviceParamsUpdated(this.deviceParams);\n    }\n  } else {\n    console.error('Failed to recalculate device parameters.');\n  }\n};\nDpdb.prototype.calcDeviceParams_ = function () {\n  var db = this.dpdb;\n  if (!db) {\n    console.error('DPDB not available.');\n    return null;\n  }\n  if (db.format != 1) {\n    console.error('DPDB has unexpected format version.');\n    return null;\n  }\n  if (!db.devices || !db.devices.length) {\n    console.error('DPDB does not have a devices section.');\n    return null;\n  }\n  var userAgent = navigator.userAgent || navigator.vendor || window.opera;\n  var width = getScreenWidth();\n  var height = getScreenHeight();\n  if (!db.devices) {\n    console.error('DPDB has no devices section.');\n    return null;\n  }\n  for (var i = 0; i < db.devices.length; i++) {\n    var device = db.devices[i];\n    if (!device.rules) {\n      console.warn('Device[' + i + '] has no rules section.');\n      continue;\n    }\n    if (device.type != 'ios' && device.type != 'android') {\n      console.warn('Device[' + i + '] has invalid type.');\n      continue;\n    }\n    if (isIOS() != (device.type == 'ios')) continue;\n    var matched = false;\n    for (var j = 0; j < device.rules.length; j++) {\n      var rule = device.rules[j];\n      if (this.ruleMatches_(rule, userAgent, width, height)) {\n        matched = true;\n        break;\n      }\n    }\n    if (!matched) continue;\n    var xdpi = device.dpi[0] || device.dpi;\n    var ydpi = device.dpi[1] || device.dpi;\n    return new DeviceParams({ xdpi: xdpi, ydpi: ydpi, bevelMm: device.bw });\n  }\n  console.warn('No DPDB device match.');\n  return null;\n};\nDpdb.prototype.ruleMatches_ = function (rule, ua, screenWidth, screenHeight) {\n  if (!rule.ua && !rule.res) return false;\n  if (rule.ua && rule.ua.substring(0, 2) === 'SM') rule.ua = rule.ua.substring(0, 7);\n  if (rule.ua && ua.indexOf(rule.ua) < 0) return false;\n  if (rule.res) {\n    if (!rule.res[0] || !rule.res[1]) return false;\n    var resX = rule.res[0];\n    var resY = rule.res[1];\n    if (Math.min(screenWidth, screenHeight) != Math.min(resX, resY) || Math.max(screenWidth, screenHeight) != Math.max(resX, resY)) {\n      return false;\n    }\n  }\n  return true;\n};\nfunction DeviceParams(params) {\n  this.xdpi = params.xdpi;\n  this.ydpi = params.ydpi;\n  this.bevelMm = params.bevelMm;\n}\nfunction SensorSample(sample, timestampS) {\n  this.set(sample, timestampS);\n}\nSensorSample.prototype.set = function (sample, timestampS) {\n  this.sample = sample;\n  this.timestampS = timestampS;\n};\nSensorSample.prototype.copy = function (sensorSample) {\n  this.set(sensorSample.sample, sensorSample.timestampS);\n};\nfunction ComplementaryFilter(kFilter, isDebug) {\n  this.kFilter = kFilter;\n  this.isDebug = isDebug;\n  this.currentAccelMeasurement = new SensorSample();\n  this.currentGyroMeasurement = new SensorSample();\n  this.previousGyroMeasurement = new SensorSample();\n  if (isIOS()) {\n    this.filterQ = new Quaternion(-1, 0, 0, 1);\n  } else {\n    this.filterQ = new Quaternion(1, 0, 0, 1);\n  }\n  this.previousFilterQ = new Quaternion();\n  this.previousFilterQ.copy(this.filterQ);\n  this.accelQ = new Quaternion();\n  this.isOrientationInitialized = false;\n  this.estimatedGravity = new Vector3();\n  this.measuredGravity = new Vector3();\n  this.gyroIntegralQ = new Quaternion();\n}\nComplementaryFilter.prototype.addAccelMeasurement = function (vector, timestampS) {\n  this.currentAccelMeasurement.set(vector, timestampS);\n};\nComplementaryFilter.prototype.addGyroMeasurement = function (vector, timestampS) {\n  this.currentGyroMeasurement.set(vector, timestampS);\n  var deltaT = timestampS - this.previousGyroMeasurement.timestampS;\n  if (isTimestampDeltaValid(deltaT)) {\n    this.run_();\n  }\n  this.previousGyroMeasurement.copy(this.currentGyroMeasurement);\n};\nComplementaryFilter.prototype.run_ = function () {\n  if (!this.isOrientationInitialized) {\n    this.accelQ = this.accelToQuaternion_(this.currentAccelMeasurement.sample);\n    this.previousFilterQ.copy(this.accelQ);\n    this.isOrientationInitialized = true;\n    return;\n  }\n  var deltaT = this.currentGyroMeasurement.timestampS - this.previousGyroMeasurement.timestampS;\n  var gyroDeltaQ = this.gyroToQuaternionDelta_(this.currentGyroMeasurement.sample, deltaT);\n  this.gyroIntegralQ.multiply(gyroDeltaQ);\n  this.filterQ.copy(this.previousFilterQ);\n  this.filterQ.multiply(gyroDeltaQ);\n  var invFilterQ = new Quaternion();\n  invFilterQ.copy(this.filterQ);\n  invFilterQ.inverse();\n  this.estimatedGravity.set(0, 0, -1);\n  this.estimatedGravity.applyQuaternion(invFilterQ);\n  this.estimatedGravity.normalize();\n  this.measuredGravity.copy(this.currentAccelMeasurement.sample);\n  this.measuredGravity.normalize();\n  var deltaQ = new Quaternion();\n  deltaQ.setFromUnitVectors(this.estimatedGravity, this.measuredGravity);\n  deltaQ.inverse();\n  if (this.isDebug) {\n    console.log('Delta: %d deg, G_est: (%s, %s, %s), G_meas: (%s, %s, %s)', radToDeg * getQuaternionAngle(deltaQ), this.estimatedGravity.x.toFixed(1), this.estimatedGravity.y.toFixed(1), this.estimatedGravity.z.toFixed(1), this.measuredGravity.x.toFixed(1), this.measuredGravity.y.toFixed(1), this.measuredGravity.z.toFixed(1));\n  }\n  var targetQ = new Quaternion();\n  targetQ.copy(this.filterQ);\n  targetQ.multiply(deltaQ);\n  this.filterQ.slerp(targetQ, 1 - this.kFilter);\n  this.previousFilterQ.copy(this.filterQ);\n};\nComplementaryFilter.prototype.getOrientation = function () {\n  return this.filterQ;\n};\nComplementaryFilter.prototype.accelToQuaternion_ = function (accel) {\n  var normAccel = new Vector3();\n  normAccel.copy(accel);\n  normAccel.normalize();\n  var quat = new Quaternion();\n  quat.setFromUnitVectors(new Vector3(0, 0, -1), normAccel);\n  quat.inverse();\n  return quat;\n};\nComplementaryFilter.prototype.gyroToQuaternionDelta_ = function (gyro, dt) {\n  var quat = new Quaternion();\n  var axis = new Vector3();\n  axis.copy(gyro);\n  axis.normalize();\n  quat.setFromAxisAngle(axis, gyro.length() * dt);\n  return quat;\n};\nfunction PosePredictor(predictionTimeS, isDebug) {\n  this.predictionTimeS = predictionTimeS;\n  this.isDebug = isDebug;\n  this.previousQ = new Quaternion();\n  this.previousTimestampS = null;\n  this.deltaQ = new Quaternion();\n  this.outQ = new Quaternion();\n}\nPosePredictor.prototype.getPrediction = function (currentQ, gyro, timestampS) {\n  if (!this.previousTimestampS) {\n    this.previousQ.copy(currentQ);\n    this.previousTimestampS = timestampS;\n    return currentQ;\n  }\n  var axis = new Vector3();\n  axis.copy(gyro);\n  axis.normalize();\n  var angularSpeed = gyro.length();\n  if (angularSpeed < degToRad * 20) {\n    if (this.isDebug) {\n      console.log('Moving slowly, at %s deg/s: no prediction', (radToDeg * angularSpeed).toFixed(1));\n    }\n    this.outQ.copy(currentQ);\n    this.previousQ.copy(currentQ);\n    return this.outQ;\n  }\n  var predictAngle = angularSpeed * this.predictionTimeS;\n  this.deltaQ.setFromAxisAngle(axis, predictAngle);\n  this.outQ.copy(this.previousQ);\n  this.outQ.multiply(this.deltaQ);\n  this.previousQ.copy(currentQ);\n  this.previousTimestampS = timestampS;\n  return this.outQ;\n};\nfunction FusionPoseSensor(kFilter, predictionTime, yawOnly, isDebug) {\n  this.yawOnly = yawOnly;\n  this.accelerometer = new Vector3();\n  this.gyroscope = new Vector3();\n  this.filter = new ComplementaryFilter(kFilter, isDebug);\n  this.posePredictor = new PosePredictor(predictionTime, isDebug);\n  this.isFirefoxAndroid = isFirefoxAndroid();\n  this.isIOS = isIOS();\n  var chromeVersion = getChromeVersion();\n  this.isDeviceMotionInRadians = !this.isIOS && chromeVersion && chromeVersion < 66;\n  this.isWithoutDeviceMotion = isChromeWithoutDeviceMotion() || isSafariWithoutDeviceMotion();\n  this.filterToWorldQ = new Quaternion();\n  if (isIOS()) {\n    this.filterToWorldQ.setFromAxisAngle(new Vector3(1, 0, 0), Math.PI / 2);\n  } else {\n    this.filterToWorldQ.setFromAxisAngle(new Vector3(1, 0, 0), -Math.PI / 2);\n  }\n  this.inverseWorldToScreenQ = new Quaternion();\n  this.worldToScreenQ = new Quaternion();\n  this.originalPoseAdjustQ = new Quaternion();\n  this.originalPoseAdjustQ.setFromAxisAngle(new Vector3(0, 0, 1), -window.orientation * Math.PI / 180);\n  this.setScreenTransform_();\n  if (isLandscapeMode()) {\n    this.filterToWorldQ.multiply(this.inverseWorldToScreenQ);\n  }\n  this.resetQ = new Quaternion();\n  this.orientationOut_ = new Float32Array(4);\n  this.start();\n}\nFusionPoseSensor.prototype.getPosition = function () {\n  return null;\n};\nFusionPoseSensor.prototype.getOrientation = function () {\n  var orientation = void 0;\n  if (this.isWithoutDeviceMotion && this._deviceOrientationQ) {\n    this.deviceOrientationFixQ = this.deviceOrientationFixQ || function () {\n      var z = new Quaternion().setFromAxisAngle(new Vector3(0, 0, -1), 0);\n      var y = new Quaternion();\n      if (window.orientation === -90) {\n        y.setFromAxisAngle(new Vector3(0, 1, 0), Math.PI / -2);\n      } else {\n        y.setFromAxisAngle(new Vector3(0, 1, 0), Math.PI / 2);\n      }\n      return z.multiply(y);\n    }();\n    this.deviceOrientationFilterToWorldQ = this.deviceOrientationFilterToWorldQ || function () {\n      var q = new Quaternion();\n      q.setFromAxisAngle(new Vector3(1, 0, 0), -Math.PI / 2);\n      return q;\n    }();\n    orientation = this._deviceOrientationQ;\n    var out = new Quaternion();\n    out.copy(orientation);\n    out.multiply(this.deviceOrientationFilterToWorldQ);\n    out.multiply(this.resetQ);\n    out.multiply(this.worldToScreenQ);\n    out.multiplyQuaternions(this.deviceOrientationFixQ, out);\n    if (this.yawOnly) {\n      out.x = 0;\n      out.z = 0;\n      out.normalize();\n    }\n    this.orientationOut_[0] = out.x;\n    this.orientationOut_[1] = out.y;\n    this.orientationOut_[2] = out.z;\n    this.orientationOut_[3] = out.w;\n    return this.orientationOut_;\n  } else {\n    var filterOrientation = this.filter.getOrientation();\n    orientation = this.posePredictor.getPrediction(filterOrientation, this.gyroscope, this.previousTimestampS);\n  }\n  var out = new Quaternion();\n  out.copy(this.filterToWorldQ);\n  out.multiply(this.resetQ);\n  out.multiply(orientation);\n  out.multiply(this.worldToScreenQ);\n  if (this.yawOnly) {\n    out.x = 0;\n    out.z = 0;\n    out.normalize();\n  }\n  this.orientationOut_[0] = out.x;\n  this.orientationOut_[1] = out.y;\n  this.orientationOut_[2] = out.z;\n  this.orientationOut_[3] = out.w;\n  return this.orientationOut_;\n};\nFusionPoseSensor.prototype.resetPose = function () {\n  this.resetQ.copy(this.filter.getOrientation());\n  this.resetQ.x = 0;\n  this.resetQ.y = 0;\n  this.resetQ.z *= -1;\n  this.resetQ.normalize();\n  if (isLandscapeMode()) {\n    this.resetQ.multiply(this.inverseWorldToScreenQ);\n  }\n  this.resetQ.multiply(this.originalPoseAdjustQ);\n};\nFusionPoseSensor.prototype.onDeviceOrientation_ = function (e) {\n  this._deviceOrientationQ = this._deviceOrientationQ || new Quaternion();\n  var alpha = e.alpha,\n      beta = e.beta,\n      gamma = e.gamma;\n  alpha = (alpha || 0) * Math.PI / 180;\n  beta = (beta || 0) * Math.PI / 180;\n  gamma = (gamma || 0) * Math.PI / 180;\n  this._deviceOrientationQ.setFromEulerYXZ(beta, alpha, -gamma);\n};\nFusionPoseSensor.prototype.onDeviceMotion_ = function (deviceMotion) {\n  this.updateDeviceMotion_(deviceMotion);\n};\nFusionPoseSensor.prototype.updateDeviceMotion_ = function (deviceMotion) {\n  var accGravity = deviceMotion.accelerationIncludingGravity;\n  var rotRate = deviceMotion.rotationRate;\n  var timestampS = deviceMotion.timeStamp / 1000;\n  var deltaS = timestampS - this.previousTimestampS;\n  if (deltaS < 0) {\n    warnOnce('fusion-pose-sensor:invalid:non-monotonic', 'Invalid timestamps detected: non-monotonic timestamp from devicemotion');\n    this.previousTimestampS = timestampS;\n    return;\n  } else if (deltaS <= MIN_TIMESTEP || deltaS > MAX_TIMESTEP) {\n    warnOnce('fusion-pose-sensor:invalid:outside-threshold', 'Invalid timestamps detected: Timestamp from devicemotion outside expected range.');\n    this.previousTimestampS = timestampS;\n    return;\n  }\n  this.accelerometer.set(-accGravity.x, -accGravity.y, -accGravity.z);\n  if (rotRate) {\n    if (isR7()) {\n      this.gyroscope.set(-rotRate.beta, rotRate.alpha, rotRate.gamma);\n    } else {\n      this.gyroscope.set(rotRate.alpha, rotRate.beta, rotRate.gamma);\n    }\n    if (!this.isDeviceMotionInRadians) {\n      this.gyroscope.multiplyScalar(Math.PI / 180);\n    }\n    this.filter.addGyroMeasurement(this.gyroscope, timestampS);\n  }\n  this.filter.addAccelMeasurement(this.accelerometer, timestampS);\n  this.previousTimestampS = timestampS;\n};\nFusionPoseSensor.prototype.onOrientationChange_ = function (screenOrientation) {\n  this.setScreenTransform_();\n};\nFusionPoseSensor.prototype.onMessage_ = function (event) {\n  var message = event.data;\n  if (!message || !message.type) {\n    return;\n  }\n  var type = message.type.toLowerCase();\n  if (type !== 'devicemotion') {\n    return;\n  }\n  this.updateDeviceMotion_(message.deviceMotionEvent);\n};\nFusionPoseSensor.prototype.setScreenTransform_ = function () {\n  this.worldToScreenQ.set(0, 0, 0, 1);\n  switch (window.orientation) {\n    case 0:\n      break;\n    case 90:\n      this.worldToScreenQ.setFromAxisAngle(new Vector3(0, 0, 1), -Math.PI / 2);\n      break;\n    case -90:\n      this.worldToScreenQ.setFromAxisAngle(new Vector3(0, 0, 1), Math.PI / 2);\n      break;\n  }\n  this.inverseWorldToScreenQ.copy(this.worldToScreenQ);\n  this.inverseWorldToScreenQ.inverse();\n};\nFusionPoseSensor.prototype.start = function () {\n  this.onDeviceMotionCallback_ = this.onDeviceMotion_.bind(this);\n  this.onOrientationChangeCallback_ = this.onOrientationChange_.bind(this);\n  this.onMessageCallback_ = this.onMessage_.bind(this);\n  this.onDeviceOrientationCallback_ = this.onDeviceOrientation_.bind(this);\n  if (isIOS() && isInsideCrossOriginIFrame()) {\n    window.addEventListener('message', this.onMessageCallback_);\n  }\n  window.addEventListener('orientationchange', this.onOrientationChangeCallback_);\n  if (this.isWithoutDeviceMotion) {\n    window.addEventListener('deviceorientation', this.onDeviceOrientationCallback_);\n  } else {\n    window.addEventListener('devicemotion', this.onDeviceMotionCallback_);\n  }\n};\nFusionPoseSensor.prototype.stop = function () {\n  window.removeEventListener('devicemotion', this.onDeviceMotionCallback_);\n  window.removeEventListener('deviceorientation', this.onDeviceOrientationCallback_);\n  window.removeEventListener('orientationchange', this.onOrientationChangeCallback_);\n  window.removeEventListener('message', this.onMessageCallback_);\n};\nvar SENSOR_FREQUENCY = 60;\nvar X_AXIS = new Vector3(1, 0, 0);\nvar Z_AXIS = new Vector3(0, 0, 1);\nvar SENSOR_TO_VR = new Quaternion();\nSENSOR_TO_VR.setFromAxisAngle(X_AXIS, -Math.PI / 2);\nSENSOR_TO_VR.multiply(new Quaternion().setFromAxisAngle(Z_AXIS, Math.PI / 2));\nvar PoseSensor = function () {\n  function PoseSensor(config) {\n    classCallCheck(this, PoseSensor);\n    this.config = config;\n    this.sensor = null;\n    this.fusionSensor = null;\n    this._out = new Float32Array(4);\n    this.api = null;\n    this.errors = [];\n    this._sensorQ = new Quaternion();\n    this._outQ = new Quaternion();\n    this._onSensorRead = this._onSensorRead.bind(this);\n    this._onSensorError = this._onSensorError.bind(this);\n    this.init();\n  }\n  createClass(PoseSensor, [{\n    key: 'init',\n    value: function init() {\n      var sensor = null;\n      try {\n        sensor = new RelativeOrientationSensor({\n          frequency: SENSOR_FREQUENCY,\n          referenceFrame: 'screen'\n        });\n        sensor.addEventListener('error', this._onSensorError);\n      } catch (error) {\n        this.errors.push(error);\n        if (error.name === 'SecurityError') {\n          console.error('Cannot construct sensors due to the Feature Policy');\n          console.warn('Attempting to fall back using \"devicemotion\"; however this will ' + 'fail in the future without correct permissions.');\n          this.useDeviceMotion();\n        } else if (error.name === 'ReferenceError') {\n          this.useDeviceMotion();\n        } else {\n          console.error(error);\n        }\n      }\n      if (sensor) {\n        this.api = 'sensor';\n        this.sensor = sensor;\n        this.sensor.addEventListener('reading', this._onSensorRead);\n        this.sensor.start();\n      }\n    }\n  }, {\n    key: 'useDeviceMotion',\n    value: function useDeviceMotion() {\n      this.api = 'devicemotion';\n      this.fusionSensor = new FusionPoseSensor(this.config.K_FILTER, this.config.PREDICTION_TIME_S, this.config.YAW_ONLY, this.config.DEBUG);\n      if (this.sensor) {\n        this.sensor.removeEventListener('reading', this._onSensorRead);\n        this.sensor.removeEventListener('error', this._onSensorError);\n        this.sensor = null;\n      }\n    }\n  }, {\n    key: 'getOrientation',\n    value: function getOrientation() {\n      if (this.fusionSensor) {\n        return this.fusionSensor.getOrientation();\n      }\n      if (!this.sensor || !this.sensor.quaternion) {\n        this._out[0] = this._out[1] = this._out[2] = 0;\n        this._out[3] = 1;\n        return this._out;\n      }\n      var q = this.sensor.quaternion;\n      this._sensorQ.set(q[0], q[1], q[2], q[3]);\n      var out = this._outQ;\n      out.copy(SENSOR_TO_VR);\n      out.multiply(this._sensorQ);\n      if (this.config.YAW_ONLY) {\n        out.x = out.z = 0;\n        out.normalize();\n      }\n      this._out[0] = out.x;\n      this._out[1] = out.y;\n      this._out[2] = out.z;\n      this._out[3] = out.w;\n      return this._out;\n    }\n  }, {\n    key: '_onSensorError',\n    value: function _onSensorError(event) {\n      this.errors.push(event.error);\n      if (event.error.name === 'NotAllowedError') {\n        console.error('Permission to access sensor was denied');\n      } else if (event.error.name === 'NotReadableError') {\n        console.error('Sensor could not be read');\n      } else {\n        console.error(event.error);\n      }\n      this.useDeviceMotion();\n    }\n  }, {\n    key: '_onSensorRead',\n    value: function _onSensorRead() {}\n  }]);\n  return PoseSensor;\n}();\nvar rotateInstructionsAsset = \"<svg width='198' height='240' viewBox='0 0 198 240' xmlns='http://www.w3.org/2000/svg'><g fill='none' fill-rule='evenodd'><path d='M149.625 109.527l6.737 3.891v.886c0 .177.013.36.038.549.01.081.02.162.027.242.14 1.415.974 2.998 2.105 3.999l5.72 5.062.081-.09s4.382-2.53 5.235-3.024l25.97 14.993v54.001c0 .771-.386 1.217-.948 1.217-.233 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document.createElement('div');\n  var s = overlay.style;\n  s.position = 'fixed';\n  s.top = 0;\n  s.right = 0;\n  s.bottom = 0;\n  s.left = 0;\n  s.backgroundColor = 'gray';\n  s.fontFamily = 'sans-serif';\n  s.zIndex = 1000000;\n  var img = document.createElement('img');\n  img.src = this.icon;\n  var s = img.style;\n  s.marginLeft = '25%';\n  s.marginTop = '25%';\n  s.width = '50%';\n  overlay.appendChild(img);\n  var text = document.createElement('div');\n  var s = text.style;\n  s.textAlign = 'center';\n  s.fontSize = '16px';\n  s.lineHeight = '24px';\n  s.margin = '24px 25%';\n  s.width = '50%';\n  text.innerHTML = 'Place your phone into your Cardboard viewer.';\n  overlay.appendChild(text);\n  var snackbar = document.createElement('div');\n  var s = snackbar.style;\n  s.backgroundColor = '#CFD8DC';\n  s.position = 'fixed';\n  s.bottom = 0;\n  s.width = '100%';\n  s.height = '48px';\n  s.padding = '14px 24px';\n  s.boxSizing = 'border-box';\n  s.color = '#656A6B';\n  overlay.appendChild(snackbar);\n  var snackbarText = document.createElement('div');\n  snackbarText.style.float = 'left';\n  snackbarText.innerHTML = 'No Cardboard viewer?';\n  var snackbarButton = document.createElement('a');\n  snackbarButton.href = 'https://www.google.com/get/cardboard/get-cardboard/';\n  snackbarButton.innerHTML = 'get one';\n  snackbarButton.target = '_blank';\n  var s = snackbarButton.style;\n  s.float = 'right';\n  s.fontWeight = 600;\n  s.textTransform = 'uppercase';\n  s.borderLeft = '1px solid gray';\n  s.paddingLeft = '24px';\n  s.textDecoration = 'none';\n  s.color = '#656A6B';\n  snackbar.appendChild(snackbarText);\n  snackbar.appendChild(snackbarButton);\n  this.overlay = overlay;\n  this.text = text;\n  this.hide();\n}\nRotateInstructions.prototype.show = function (parent) {\n  if (!parent && !this.overlay.parentElement) {\n    document.body.appendChild(this.overlay);\n  } else if (parent) {\n    if (this.overlay.parentElement && this.overlay.parentElement != parent) this.overlay.parentElement.removeChild(this.overlay);\n    parent.appendChild(this.overlay);\n  }\n  this.overlay.style.display = 'block';\n  var img = this.overlay.querySelector('img');\n  var s = img.style;\n  if (isLandscapeMode()) {\n    s.width = '20%';\n    s.marginLeft = '40%';\n    s.marginTop = '3%';\n  } else {\n    s.width = '50%';\n    s.marginLeft = '25%';\n    s.marginTop = '25%';\n  }\n};\nRotateInstructions.prototype.hide = function () {\n  this.overlay.style.display = 'none';\n};\nRotateInstructions.prototype.showTemporarily = function (ms, parent) {\n  this.show(parent);\n  this.timer = setTimeout(this.hide.bind(this), ms);\n};\nRotateInstructions.prototype.disableShowTemporarily = function () {\n  clearTimeout(this.timer);\n};\nRotateInstructions.prototype.update = function () {\n  this.disableShowTemporarily();\n  if (!isLandscapeMode() && isMobile()) {\n    this.show();\n  } else {\n    this.hide();\n  }\n};\nRotateInstructions.prototype.loadIcon_ = function () {\n  this.icon = dataUri('image/svg+xml', rotateInstructionsAsset);\n};\nvar DEFAULT_VIEWER = 'CardboardV1';\nvar VIEWER_KEY = 'WEBVR_CARDBOARD_VIEWER';\nvar CLASS_NAME = 'webvr-polyfill-viewer-selector';\nfunction ViewerSelector(defaultViewer) {\n  try {\n    this.selectedKey = localStorage.getItem(VIEWER_KEY);\n  } catch (error) {\n    console.error('Failed to load viewer profile: %s', error);\n  }\n  if (!this.selectedKey) {\n    this.selectedKey = defaultViewer || DEFAULT_VIEWER;\n  }\n  this.dialog = this.createDialog_(DeviceInfo.Viewers);\n  this.root = null;\n  this.onChangeCallbacks_ = [];\n}\nViewerSelector.prototype.show = function (root) {\n  this.root = root;\n  root.appendChild(this.dialog);\n  var selected = this.dialog.querySelector('#' + this.selectedKey);\n  selected.checked = true;\n  this.dialog.style.display = 'block';\n};\nViewerSelector.prototype.hide = function () {\n  if (this.root && this.root.contains(this.dialog)) {\n    this.root.removeChild(this.dialog);\n  }\n  this.dialog.style.display = 'none';\n};\nViewerSelector.prototype.getCurrentViewer = function () {\n  return DeviceInfo.Viewers[this.selectedKey];\n};\nViewerSelector.prototype.getSelectedKey_ = function () {\n  var input = this.dialog.querySelector('input[name=field]:checked');\n  if (input) {\n    return input.id;\n  }\n  return null;\n};\nViewerSelector.prototype.onChange = function (cb) {\n  this.onChangeCallbacks_.push(cb);\n};\nViewerSelector.prototype.fireOnChange_ = function (viewer) {\n  for (var i = 0; i < this.onChangeCallbacks_.length; i++) {\n    this.onChangeCallbacks_[i](viewer);\n  }\n};\nViewerSelector.prototype.onSave_ = function () {\n  this.selectedKey = this.getSelectedKey_();\n  if (!this.selectedKey || !DeviceInfo.Viewers[this.selectedKey]) {\n    console.error('ViewerSelector.onSave_: this should never happen!');\n    return;\n  }\n  this.fireOnChange_(DeviceInfo.Viewers[this.selectedKey]);\n  try {\n    localStorage.setItem(VIEWER_KEY, this.selectedKey);\n  } catch (error) {\n    console.error('Failed to save viewer profile: %s', error);\n  }\n  this.hide();\n};\nViewerSelector.prototype.createDialog_ = function (options) {\n  var container = document.createElement('div');\n  container.classList.add(CLASS_NAME);\n  container.style.display = 'none';\n  var overlay = document.createElement('div');\n  var s = overlay.style;\n  s.position = 'fixed';\n  s.left = 0;\n  s.top = 0;\n  s.width = '100%';\n  s.height = '100%';\n  s.background = 'rgba(0, 0, 0, 0.3)';\n  overlay.addEventListener('click', this.hide.bind(this));\n  var width = 280;\n  var dialog = document.createElement('div');\n  var s = dialog.style;\n  s.boxSizing = 'border-box';\n  s.position = 'fixed';\n  s.top = '24px';\n  s.left = '50%';\n  s.marginLeft = -width / 2 + 'px';\n  s.width = width + 'px';\n  s.padding = '24px';\n  s.overflow = 'hidden';\n  s.background = '#fafafa';\n  s.fontFamily = \"'Roboto', sans-serif\";\n  s.boxShadow = '0px 5px 20px #666';\n  dialog.appendChild(this.createH1_('Select your viewer'));\n  for (var id in options) {\n    dialog.appendChild(this.createChoice_(id, options[id].label));\n  }\n  dialog.appendChild(this.createButton_('Save', this.onSave_.bind(this)));\n  container.appendChild(overlay);\n  container.appendChild(dialog);\n  return container;\n};\nViewerSelector.prototype.createH1_ = function (name) {\n  var h1 = document.createElement('h1');\n  var s = h1.style;\n  s.color = 'black';\n  s.fontSize = '20px';\n  s.fontWeight = 'bold';\n  s.marginTop = 0;\n  s.marginBottom = '24px';\n  h1.innerHTML = name;\n  return h1;\n};\nViewerSelector.prototype.createChoice_ = function (id, name) {\n  var div = document.createElement('div');\n  div.style.marginTop = '8px';\n  div.style.color = 'black';\n  var input = document.createElement('input');\n  input.style.fontSize = '30px';\n  input.setAttribute('id', id);\n  input.setAttribute('type', 'radio');\n  input.setAttribute('value', id);\n  input.setAttribute('name', 'field');\n  var label = document.createElement('label');\n  label.style.marginLeft = '4px';\n  label.setAttribute('for', id);\n  label.innerHTML = name;\n  div.appendChild(input);\n  div.appendChild(label);\n  return div;\n};\nViewerSelector.prototype.createButton_ = function (label, onclick) {\n  var button = document.createElement('button');\n  button.innerHTML = label;\n  var s = button.style;\n  s.float = 'right';\n  s.textTransform = 'uppercase';\n  s.color = '#1094f7';\n  s.fontSize = '14px';\n  s.letterSpacing = 0;\n  s.border = 0;\n  s.background = 'none';\n  s.marginTop = '16px';\n  button.addEventListener('click', onclick);\n  return button;\n};\nvar commonjsGlobal$$1 = typeof window !== 'undefined' ? window : typeof commonjsGlobal$1 !== 'undefined' ? commonjsGlobal$1 : typeof self !== 'undefined' ? self : {};\nfunction unwrapExports$$1 (x) {\n\treturn x && x.__esModule && Object.prototype.hasOwnProperty.call(x, 'default') ? x['default'] : x;\n}\nfunction createCommonjsModule$$1(fn, module) {\n\treturn module = { exports: {} }, fn(module, module.exports), module.exports;\n}\nvar NoSleep = createCommonjsModule$$1(function (module, exports) {\n(function webpackUniversalModuleDefinition(root, factory) {\n\tmodule.exports = factory();\n})(commonjsGlobal$$1, function() {\nreturn          (function(modules) {\n         \tvar installedModules = {};\n         \tfunction __webpack_require__(moduleId) {\n         \t\tif(installedModules[moduleId]) {\n         \t\t\treturn installedModules[moduleId].exports;\n         \t\t}\n         \t\tvar module = installedModules[moduleId] = {\n         \t\t\ti: moduleId,\n         \t\t\tl: false,\n         \t\t\texports: {}\n         \t\t};\n         \t\tmodules[moduleId].call(module.exports, module, module.exports, __webpack_require__);\n         \t\tmodule.l = true;\n         \t\treturn module.exports;\n         \t}\n         \t__webpack_require__.m = modules;\n         \t__webpack_require__.c = installedModules;\n         \t__webpack_require__.d = function(exports, name, getter) {\n         \t\tif(!__webpack_require__.o(exports, name)) {\n         \t\t\tObject.defineProperty(exports, name, {\n         \t\t\t\tconfigurable: false,\n         \t\t\t\tenumerable: true,\n         \t\t\t\tget: getter\n         \t\t\t});\n         \t\t}\n         \t};\n         \t__webpack_require__.n = function(module) {\n         \t\tvar getter = module && module.__esModule ?\n         \t\t\tfunction getDefault() { return module['default']; } :\n         \t\t\tfunction getModuleExports() { return module; };\n         \t\t__webpack_require__.d(getter, 'a', getter);\n         \t\treturn getter;\n         \t};\n         \t__webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };\n         \t__webpack_require__.p = \"\";\n         \treturn __webpack_require__(__webpack_require__.s = 0);\n         })\n         ([\n      (function(module, exports, __webpack_require__) {\nvar _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\nvar mediaFile = __webpack_require__(1);\nvar oldIOS = typeof navigator !== 'undefined' && parseFloat(('' + (/CPU.*OS ([0-9_]{3,4})[0-9_]{0,1}|(CPU like).*AppleWebKit.*Mobile/i.exec(navigator.userAgent) || [0, ''])[1]).replace('undefined', '3_2').replace('_', '.').replace('_', '')) < 10 && !window.MSStream;\nvar NoSleep = function () {\n  function NoSleep() {\n    _classCallCheck(this, NoSleep);\n    if (oldIOS) {\n      this.noSleepTimer = null;\n    } else {\n      this.noSleepVideo = document.createElement('video');\n      this.noSleepVideo.setAttribute('playsinline', '');\n      this.noSleepVideo.setAttribute('src', mediaFile);\n      this.noSleepVideo.addEventListener('timeupdate', function (e) {\n        if (this.noSleepVideo.currentTime > 0.5) {\n          this.noSleepVideo.currentTime = Math.random();\n        }\n      }.bind(this));\n    }\n  }\n  _createClass(NoSleep, [{\n    key: 'enable',\n    value: function enable() {\n      if (oldIOS) {\n        this.disable();\n        this.noSleepTimer = window.setInterval(function () {\n          window.location.href = '/';\n          window.setTimeout(window.stop, 0);\n        }, 15000);\n      } else {\n        this.noSleepVideo.play();\n      }\n    }\n  }, {\n    key: 'disable',\n    value: function disable() {\n      if (oldIOS) {\n        if (this.noSleepTimer) {\n          window.clearInterval(this.noSleepTimer);\n          this.noSleepTimer = null;\n        }\n      } else {\n        this.noSleepVideo.pause();\n      }\n    }\n  }]);\n  return NoSleep;\n}();\nmodule.exports = NoSleep;\n      }),\n      (function(module, exports, __webpack_require__) {\nmodule.exports = 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     })\n         ]);\n});\n});\nvar NoSleep$1 = unwrapExports$$1(NoSleep);\nvar nextDisplayId = 1000;\nvar defaultLeftBounds = [0, 0, 0.5, 1];\nvar defaultRightBounds = [0.5, 0, 0.5, 1];\nvar raf = window.requestAnimationFrame;\nvar caf = window.cancelAnimationFrame;\nfunction VRFrameData() {\n  this.leftProjectionMatrix = new Float32Array(16);\n  this.leftViewMatrix = new Float32Array(16);\n  this.rightProjectionMatrix = new Float32Array(16);\n  this.rightViewMatrix = new Float32Array(16);\n  this.pose = null;\n}\nfunction VRDisplayCapabilities(config) {\n  Object.defineProperties(this, {\n    hasPosition: {\n      writable: false, enumerable: true, value: config.hasPosition\n    },\n    hasExternalDisplay: {\n      writable: false, enumerable: true, value: config.hasExternalDisplay\n    },\n    canPresent: {\n      writable: false, enumerable: true, value: config.canPresent\n    },\n    maxLayers: {\n      writable: false, enumerable: true, value: config.maxLayers\n    },\n    hasOrientation: {\n      enumerable: true, get: function get() {\n        deprecateWarning('VRDisplayCapabilities.prototype.hasOrientation', 'VRDisplay.prototype.getFrameData');\n        return config.hasOrientation;\n      }\n    }\n  });\n}\nfunction VRDisplay(config) {\n  config = config || {};\n  var USE_WAKELOCK = 'wakelock' in config ? config.wakelock : true;\n  this.isPolyfilled = true;\n  this.displayId = nextDisplayId++;\n  this.displayName = '';\n  this.depthNear = 0.01;\n  this.depthFar = 10000.0;\n  this.isPresenting = false;\n  Object.defineProperty(this, 'isConnected', {\n    get: function get() {\n      deprecateWarning('VRDisplay.prototype.isConnected', 'VRDisplayCapabilities.prototype.hasExternalDisplay');\n      return false;\n    }\n  });\n  this.capabilities = new VRDisplayCapabilities({\n    hasPosition: false,\n    hasOrientation: false,\n    hasExternalDisplay: false,\n    canPresent: false,\n    maxLayers: 1\n  });\n  this.stageParameters = null;\n  this.waitingForPresent_ = false;\n  this.layer_ = null;\n  this.originalParent_ = null;\n  this.fullscreenElement_ = null;\n  this.fullscreenWrapper_ = null;\n  this.fullscreenElementCachedStyle_ = null;\n  this.fullscreenEventTarget_ = null;\n  this.fullscreenChangeHandler_ = null;\n  this.fullscreenErrorHandler_ = null;\n  if (USE_WAKELOCK && isMobile()) {\n    this.wakelock_ = new NoSleep$1();\n  }\n}\nVRDisplay.prototype.getFrameData = function (frameData) {\n  return frameDataFromPose(frameData, this._getPose(), this);\n};\nVRDisplay.prototype.getPose = function () {\n  deprecateWarning('VRDisplay.prototype.getPose', 'VRDisplay.prototype.getFrameData');\n  return this._getPose();\n};\nVRDisplay.prototype.resetPose = function () {\n  deprecateWarning('VRDisplay.prototype.resetPose');\n  return this._resetPose();\n};\nVRDisplay.prototype.getImmediatePose = function () {\n  deprecateWarning('VRDisplay.prototype.getImmediatePose', 'VRDisplay.prototype.getFrameData');\n  return this._getPose();\n};\nVRDisplay.prototype.requestAnimationFrame = function (callback) {\n  return raf(callback);\n};\nVRDisplay.prototype.cancelAnimationFrame = function (id) {\n  return caf(id);\n};\nVRDisplay.prototype.wrapForFullscreen = function (element) {\n  if (isIOS()) {\n    return element;\n  }\n  if (!this.fullscreenWrapper_) {\n    this.fullscreenWrapper_ = document.createElement('div');\n    var cssProperties = ['height: ' + Math.min(screen.height, screen.width) + 'px !important', 'top: 0 !important', 'left: 0 !important', 'right: 0 !important', 'border: 0', 'margin: 0', 'padding: 0', 'z-index: 999999 !important', 'position: fixed'];\n    this.fullscreenWrapper_.setAttribute('style', cssProperties.join('; ') + ';');\n    this.fullscreenWrapper_.classList.add('webvr-polyfill-fullscreen-wrapper');\n  }\n  if (this.fullscreenElement_ == element) {\n    return this.fullscreenWrapper_;\n  }\n  if (this.fullscreenElement_) {\n    if (this.originalParent_) {\n      this.originalParent_.appendChild(this.fullscreenElement_);\n    } else {\n      this.fullscreenElement_.parentElement.removeChild(this.fullscreenElement_);\n    }\n  }\n  this.fullscreenElement_ = element;\n  this.originalParent_ = element.parentElement;\n  if (!this.originalParent_) {\n    document.body.appendChild(element);\n  }\n  if (!this.fullscreenWrapper_.parentElement) {\n    var parent = this.fullscreenElement_.parentElement;\n    parent.insertBefore(this.fullscreenWrapper_, this.fullscreenElement_);\n    parent.removeChild(this.fullscreenElement_);\n  }\n  this.fullscreenWrapper_.insertBefore(this.fullscreenElement_, this.fullscreenWrapper_.firstChild);\n  this.fullscreenElementCachedStyle_ = this.fullscreenElement_.getAttribute('style');\n  var self = this;\n  function applyFullscreenElementStyle() {\n    if (!self.fullscreenElement_) {\n      return;\n    }\n    var cssProperties = ['position: absolute', 'top: 0', 'left: 0', 'width: ' + Math.max(screen.width, screen.height) + 'px', 'height: ' + Math.min(screen.height, screen.width) + 'px', 'border: 0', 'margin: 0', 'padding: 0'];\n    self.fullscreenElement_.setAttribute('style', cssProperties.join('; ') + ';');\n  }\n  applyFullscreenElementStyle();\n  return this.fullscreenWrapper_;\n};\nVRDisplay.prototype.removeFullscreenWrapper = function () {\n  if (!this.fullscreenElement_) {\n    return;\n  }\n  var element = this.fullscreenElement_;\n  if (this.fullscreenElementCachedStyle_) {\n    element.setAttribute('style', this.fullscreenElementCachedStyle_);\n  } else {\n    element.removeAttribute('style');\n  }\n  this.fullscreenElement_ = null;\n  this.fullscreenElementCachedStyle_ = null;\n  var parent = this.fullscreenWrapper_.parentElement;\n  this.fullscreenWrapper_.removeChild(element);\n  if (this.originalParent_ === parent) {\n    parent.insertBefore(element, this.fullscreenWrapper_);\n  }\n  else if (this.originalParent_) {\n      this.originalParent_.appendChild(element);\n    }\n  parent.removeChild(this.fullscreenWrapper_);\n  return element;\n};\nVRDisplay.prototype.requestPresent = function (layers) {\n  var wasPresenting = this.isPresenting;\n  var self = this;\n  if (!(layers instanceof Array)) {\n    deprecateWarning('VRDisplay.prototype.requestPresent with non-array argument', 'an array of VRLayers as the first argument');\n    layers = [layers];\n  }\n  return new Promise(function (resolve, reject) {\n    if (!self.capabilities.canPresent) {\n      reject(new Error('VRDisplay is not capable of presenting.'));\n      return;\n    }\n    if (layers.length == 0 || layers.length > self.capabilities.maxLayers) {\n      reject(new Error('Invalid number of layers.'));\n      return;\n    }\n    var incomingLayer = layers[0];\n    if (!incomingLayer.source) {\n      resolve();\n      return;\n    }\n    var leftBounds = incomingLayer.leftBounds || defaultLeftBounds;\n    var rightBounds = incomingLayer.rightBounds || defaultRightBounds;\n    if (wasPresenting) {\n      var layer = self.layer_;\n      if (layer.source !== incomingLayer.source) {\n        layer.source = incomingLayer.source;\n      }\n      for (var i = 0; i < 4; i++) {\n        layer.leftBounds[i] = leftBounds[i];\n        layer.rightBounds[i] = rightBounds[i];\n      }\n      self.wrapForFullscreen(self.layer_.source);\n      self.updatePresent_();\n      resolve();\n      return;\n    }\n    self.layer_ = {\n      predistorted: incomingLayer.predistorted,\n      source: incomingLayer.source,\n      leftBounds: leftBounds.slice(0),\n      rightBounds: rightBounds.slice(0)\n    };\n    self.waitingForPresent_ = false;\n    if (self.layer_ && self.layer_.source) {\n      var fullscreenElement = self.wrapForFullscreen(self.layer_.source);\n      var onFullscreenChange = function onFullscreenChange() {\n        var actualFullscreenElement = getFullscreenElement();\n        self.isPresenting = fullscreenElement === actualFullscreenElement;\n        if (self.isPresenting) {\n          if (screen.orientation && screen.orientation.lock) {\n            screen.orientation.lock('landscape-primary').catch(function (error) {\n              console.error('screen.orientation.lock() failed due to', error.message);\n            });\n          }\n          self.waitingForPresent_ = false;\n          self.beginPresent_();\n          resolve();\n        } else {\n          if (screen.orientation && screen.orientation.unlock) {\n            screen.orientation.unlock();\n          }\n          self.removeFullscreenWrapper();\n          self.disableWakeLock();\n          self.endPresent_();\n          self.removeFullscreenListeners_();\n        }\n        self.fireVRDisplayPresentChange_();\n      };\n      var onFullscreenError = function onFullscreenError() {\n        if (!self.waitingForPresent_) {\n          return;\n        }\n        self.removeFullscreenWrapper();\n        self.removeFullscreenListeners_();\n        self.disableWakeLock();\n        self.waitingForPresent_ = false;\n        self.isPresenting = false;\n        reject(new Error('Unable to present.'));\n      };\n      self.addFullscreenListeners_(fullscreenElement, onFullscreenChange, onFullscreenError);\n      if (requestFullscreen(fullscreenElement)) {\n        self.enableWakeLock();\n        self.waitingForPresent_ = true;\n      } else if (isIOS() || isWebViewAndroid()) {\n        self.enableWakeLock();\n        self.isPresenting = true;\n        self.beginPresent_();\n        self.fireVRDisplayPresentChange_();\n        resolve();\n      }\n    }\n    if (!self.waitingForPresent_ && !isIOS()) {\n      exitFullscreen();\n      reject(new Error('Unable to present.'));\n    }\n  });\n};\nVRDisplay.prototype.exitPresent = function () {\n  var wasPresenting = this.isPresenting;\n  var self = this;\n  this.isPresenting = false;\n  this.layer_ = null;\n  this.disableWakeLock();\n  return new Promise(function (resolve, reject) {\n    if (wasPresenting) {\n      if (!exitFullscreen() && isIOS()) {\n        self.endPresent_();\n        self.fireVRDisplayPresentChange_();\n      }\n      if (isWebViewAndroid()) {\n        self.removeFullscreenWrapper();\n        self.removeFullscreenListeners_();\n        self.endPresent_();\n        self.fireVRDisplayPresentChange_();\n      }\n      resolve();\n    } else {\n      reject(new Error('Was not presenting to VRDisplay.'));\n    }\n  });\n};\nVRDisplay.prototype.getLayers = function () {\n  if (this.layer_) {\n    return [this.layer_];\n  }\n  return [];\n};\nVRDisplay.prototype.fireVRDisplayPresentChange_ = function () {\n  var event = new CustomEvent('vrdisplaypresentchange', { detail: { display: this } });\n  window.dispatchEvent(event);\n};\nVRDisplay.prototype.fireVRDisplayConnect_ = function () {\n  var event = new CustomEvent('vrdisplayconnect', { detail: { display: this } });\n  window.dispatchEvent(event);\n};\nVRDisplay.prototype.addFullscreenListeners_ = function (element, changeHandler, errorHandler) {\n  this.removeFullscreenListeners_();\n  this.fullscreenEventTarget_ = element;\n  this.fullscreenChangeHandler_ = changeHandler;\n  this.fullscreenErrorHandler_ = errorHandler;\n  if (changeHandler) {\n    if (document.fullscreenEnabled) {\n      element.addEventListener('fullscreenchange', changeHandler, false);\n    } else if (document.webkitFullscreenEnabled) {\n      element.addEventListener('webkitfullscreenchange', changeHandler, false);\n    } else if (document.mozFullScreenEnabled) {\n      document.addEventListener('mozfullscreenchange', changeHandler, false);\n    } else if (document.msFullscreenEnabled) {\n      element.addEventListener('msfullscreenchange', changeHandler, false);\n    }\n  }\n  if (errorHandler) {\n    if (document.fullscreenEnabled) {\n      element.addEventListener('fullscreenerror', errorHandler, false);\n    } else if (document.webkitFullscreenEnabled) {\n      element.addEventListener('webkitfullscreenerror', errorHandler, false);\n    } else if (document.mozFullScreenEnabled) {\n      document.addEventListener('mozfullscreenerror', errorHandler, false);\n    } else if (document.msFullscreenEnabled) {\n      element.addEventListener('msfullscreenerror', errorHandler, false);\n    }\n  }\n};\nVRDisplay.prototype.removeFullscreenListeners_ = function () {\n  if (!this.fullscreenEventTarget_) return;\n  var element = this.fullscreenEventTarget_;\n  if (this.fullscreenChangeHandler_) {\n    var changeHandler = this.fullscreenChangeHandler_;\n    element.removeEventListener('fullscreenchange', changeHandler, false);\n    element.removeEventListener('webkitfullscreenchange', changeHandler, false);\n    document.removeEventListener('mozfullscreenchange', changeHandler, false);\n    element.removeEventListener('msfullscreenchange', changeHandler, false);\n  }\n  if (this.fullscreenErrorHandler_) {\n    var errorHandler = this.fullscreenErrorHandler_;\n    element.removeEventListener('fullscreenerror', errorHandler, false);\n    element.removeEventListener('webkitfullscreenerror', errorHandler, false);\n    document.removeEventListener('mozfullscreenerror', errorHandler, false);\n    element.removeEventListener('msfullscreenerror', errorHandler, false);\n  }\n  this.fullscreenEventTarget_ = null;\n  this.fullscreenChangeHandler_ = null;\n  this.fullscreenErrorHandler_ = null;\n};\nVRDisplay.prototype.enableWakeLock = function () {\n  if (this.wakelock_) {\n    this.wakelock_.enable();\n  }\n};\nVRDisplay.prototype.disableWakeLock = function () {\n  if (this.wakelock_) {\n    this.wakelock_.disable();\n  }\n};\nVRDisplay.prototype.beginPresent_ = function () {\n};\nVRDisplay.prototype.endPresent_ = function () {\n};\nVRDisplay.prototype.submitFrame = function (pose) {\n};\nVRDisplay.prototype.getEyeParameters = function (whichEye) {\n  return null;\n};\nvar config = {\n  ADDITIONAL_VIEWERS: [],\n  DEFAULT_VIEWER: '',\n  MOBILE_WAKE_LOCK: true,\n  DEBUG: false,\n  DPDB_URL: 'https://dpdb.webvr.rocks/dpdb.json',\n  K_FILTER: 0.98,\n  PREDICTION_TIME_S: 0.040,\n  CARDBOARD_UI_DISABLED: false,\n  ROTATE_INSTRUCTIONS_DISABLED: false,\n  YAW_ONLY: false,\n  BUFFER_SCALE: 0.5,\n  DIRTY_SUBMIT_FRAME_BINDINGS: false\n};\nvar Eye = {\n  LEFT: 'left',\n  RIGHT: 'right'\n};\nfunction CardboardVRDisplay(config$$1) {\n  var defaults = extend({}, config);\n  config$$1 = extend(defaults, config$$1 || {});\n  VRDisplay.call(this, {\n    wakelock: config$$1.MOBILE_WAKE_LOCK\n  });\n  this.config = config$$1;\n  this.displayName = 'Cardboard VRDisplay';\n  this.capabilities = new VRDisplayCapabilities({\n    hasPosition: false,\n    hasOrientation: true,\n    hasExternalDisplay: false,\n    canPresent: true,\n    maxLayers: 1\n  });\n  this.stageParameters = null;\n  this.bufferScale_ = this.config.BUFFER_SCALE;\n  this.poseSensor_ = new PoseSensor(this.config);\n  this.distorter_ = null;\n  this.cardboardUI_ = null;\n  this.dpdb_ = new Dpdb(this.config.DPDB_URL, this.onDeviceParamsUpdated_.bind(this));\n  this.deviceInfo_ = new DeviceInfo(this.dpdb_.getDeviceParams(), config$$1.ADDITIONAL_VIEWERS);\n  this.viewerSelector_ = new ViewerSelector(config$$1.DEFAULT_VIEWER);\n  this.viewerSelector_.onChange(this.onViewerChanged_.bind(this));\n  this.deviceInfo_.setViewer(this.viewerSelector_.getCurrentViewer());\n  if (!this.config.ROTATE_INSTRUCTIONS_DISABLED) {\n    this.rotateInstructions_ = new RotateInstructions();\n  }\n  if (isIOS()) {\n    window.addEventListener('resize', this.onResize_.bind(this));\n  }\n}\nCardboardVRDisplay.prototype = Object.create(VRDisplay.prototype);\nCardboardVRDisplay.prototype._getPose = function () {\n  return {\n    position: null,\n    orientation: this.poseSensor_.getOrientation(),\n    linearVelocity: null,\n    linearAcceleration: null,\n    angularVelocity: null,\n    angularAcceleration: null\n  };\n};\nCardboardVRDisplay.prototype._resetPose = function () {\n  if (this.poseSensor_.resetPose) {\n    this.poseSensor_.resetPose();\n  }\n};\nCardboardVRDisplay.prototype._getFieldOfView = function (whichEye) {\n  var fieldOfView;\n  if (whichEye == Eye.LEFT) {\n    fieldOfView = this.deviceInfo_.getFieldOfViewLeftEye();\n  } else if (whichEye == Eye.RIGHT) {\n    fieldOfView = this.deviceInfo_.getFieldOfViewRightEye();\n  } else {\n    console.error('Invalid eye provided: %s', whichEye);\n    return null;\n  }\n  return fieldOfView;\n};\nCardboardVRDisplay.prototype._getEyeOffset = function (whichEye) {\n  var offset;\n  if (whichEye == Eye.LEFT) {\n    offset = [-this.deviceInfo_.viewer.interLensDistance * 0.5, 0.0, 0.0];\n  } else if (whichEye == Eye.RIGHT) {\n    offset = [this.deviceInfo_.viewer.interLensDistance * 0.5, 0.0, 0.0];\n  } else {\n    console.error('Invalid eye provided: %s', whichEye);\n    return null;\n  }\n  return offset;\n};\nCardboardVRDisplay.prototype.getEyeParameters = function (whichEye) {\n  var offset = this._getEyeOffset(whichEye);\n  var fieldOfView = this._getFieldOfView(whichEye);\n  var eyeParams = {\n    offset: offset,\n    renderWidth: this.deviceInfo_.device.width * 0.5 * this.bufferScale_,\n    renderHeight: this.deviceInfo_.device.height * this.bufferScale_\n  };\n  Object.defineProperty(eyeParams, 'fieldOfView', {\n    enumerable: true,\n    get: function get() {\n      deprecateWarning('VRFieldOfView', 'VRFrameData\\'s projection matrices');\n      return fieldOfView;\n    }\n  });\n  return eyeParams;\n};\nCardboardVRDisplay.prototype.onDeviceParamsUpdated_ = function (newParams) {\n  if (this.config.DEBUG) {\n    console.log('DPDB reported that device params were updated.');\n  }\n  this.deviceInfo_.updateDeviceParams(newParams);\n  if (this.distorter_) {\n    this.distorter_.updateDeviceInfo(this.deviceInfo_);\n  }\n};\nCardboardVRDisplay.prototype.updateBounds_ = function () {\n  if (this.layer_ && this.distorter_ && (this.layer_.leftBounds || this.layer_.rightBounds)) {\n    this.distorter_.setTextureBounds(this.layer_.leftBounds, this.layer_.rightBounds);\n  }\n};\nCardboardVRDisplay.prototype.beginPresent_ = function () {\n  var gl = this.layer_.source.getContext('webgl');\n  if (!gl) gl = this.layer_.source.getContext('experimental-webgl');\n  if (!gl) gl = this.layer_.source.getContext('webgl2');\n  if (!gl) return;\n  if (this.layer_.predistorted) {\n    if (!this.config.CARDBOARD_UI_DISABLED) {\n      gl.canvas.width = getScreenWidth() * this.bufferScale_;\n      gl.canvas.height = getScreenHeight() * this.bufferScale_;\n      this.cardboardUI_ = new CardboardUI(gl);\n    }\n  } else {\n    if (!this.config.CARDBOARD_UI_DISABLED) {\n      this.cardboardUI_ = new CardboardUI(gl);\n    }\n    this.distorter_ = new CardboardDistorter(gl, this.cardboardUI_, this.config.BUFFER_SCALE, this.config.DIRTY_SUBMIT_FRAME_BINDINGS);\n    this.distorter_.updateDeviceInfo(this.deviceInfo_);\n  }\n  if (this.cardboardUI_) {\n    this.cardboardUI_.listen(function (e) {\n      this.viewerSelector_.show(this.layer_.source.parentElement);\n      e.stopPropagation();\n      e.preventDefault();\n    }.bind(this), function (e) {\n      this.exitPresent();\n      e.stopPropagation();\n      e.preventDefault();\n    }.bind(this));\n  }\n  if (this.rotateInstructions_) {\n    if (isLandscapeMode() && isMobile()) {\n      this.rotateInstructions_.showTemporarily(3000, this.layer_.source.parentElement);\n    } else {\n      this.rotateInstructions_.update();\n    }\n  }\n  this.orientationHandler = this.onOrientationChange_.bind(this);\n  window.addEventListener('orientationchange', this.orientationHandler);\n  this.vrdisplaypresentchangeHandler = this.updateBounds_.bind(this);\n  window.addEventListener('vrdisplaypresentchange', this.vrdisplaypresentchangeHandler);\n  this.fireVRDisplayDeviceParamsChange_();\n};\nCardboardVRDisplay.prototype.endPresent_ = function () {\n  if (this.distorter_) {\n    this.distorter_.destroy();\n    this.distorter_ = null;\n  }\n  if (this.cardboardUI_) {\n    this.cardboardUI_.destroy();\n    this.cardboardUI_ = null;\n  }\n  if (this.rotateInstructions_) {\n    this.rotateInstructions_.hide();\n  }\n  this.viewerSelector_.hide();\n  window.removeEventListener('orientationchange', this.orientationHandler);\n  window.removeEventListener('vrdisplaypresentchange', this.vrdisplaypresentchangeHandler);\n};\nCardboardVRDisplay.prototype.updatePresent_ = function () {\n  this.endPresent_();\n  this.beginPresent_();\n};\nCardboardVRDisplay.prototype.submitFrame = function (pose) {\n  if (this.distorter_) {\n    this.updateBounds_();\n    this.distorter_.submitFrame();\n  } else if (this.cardboardUI_ && this.layer_) {\n    var gl = this.layer_.source.getContext('webgl');\n    if (!gl) gl = this.layer_.source.getContext('experimental-webgl');\n    if (!gl) gl = this.layer_.source.getContext('webgl2');\n    var canvas = gl.canvas;\n    if (canvas.width != this.lastWidth || canvas.height != this.lastHeight) {\n      this.cardboardUI_.onResize();\n    }\n    this.lastWidth = canvas.width;\n    this.lastHeight = canvas.height;\n    this.cardboardUI_.render();\n  }\n};\nCardboardVRDisplay.prototype.onOrientationChange_ = function (e) {\n  this.viewerSelector_.hide();\n  if (this.rotateInstructions_) {\n    this.rotateInstructions_.update();\n  }\n  this.onResize_();\n};\nCardboardVRDisplay.prototype.onResize_ = function (e) {\n  if (this.layer_) {\n    var gl = this.layer_.source.getContext('webgl');\n    if (!gl) gl = this.layer_.source.getContext('experimental-webgl');\n    if (!gl) gl = this.layer_.source.getContext('webgl2');\n    var cssProperties = ['position: absolute', 'top: 0', 'left: 0',\n    'width: 100vw', 'height: 100vh', 'border: 0', 'margin: 0',\n    'padding: 0px', 'box-sizing: content-box'];\n    gl.canvas.setAttribute('style', cssProperties.join('; ') + ';');\n    safariCssSizeWorkaround(gl.canvas);\n  }\n};\nCardboardVRDisplay.prototype.onViewerChanged_ = function (viewer) {\n  this.deviceInfo_.setViewer(viewer);\n  if (this.distorter_) {\n    this.distorter_.updateDeviceInfo(this.deviceInfo_);\n  }\n  this.fireVRDisplayDeviceParamsChange_();\n};\nCardboardVRDisplay.prototype.fireVRDisplayDeviceParamsChange_ = function () {\n  var event = new CustomEvent('vrdisplaydeviceparamschange', {\n    detail: {\n      vrdisplay: this,\n      deviceInfo: this.deviceInfo_\n    }\n  });\n  window.dispatchEvent(event);\n};\nCardboardVRDisplay.VRFrameData = VRFrameData;\nCardboardVRDisplay.VRDisplay = VRDisplay;\nreturn CardboardVRDisplay;\n})));\n});\nvar CardboardVRDisplay = unwrapExports(cardboardVrDisplay);\n\nclass XRDevice extends EventTarget {\n  constructor(global) {\n    super();\n    this.global = global;\n    this.onWindowResize = this.onWindowResize.bind(this);\n    this.global.window.addEventListener('resize', this.onWindowResize);\n    this.environmentBlendMode = 'opaque';\n  }\n  onBaseLayerSet(sessionId, layer) { throw new Error('Not implemented'); }\n  isSessionSupported(mode) { throw new Error('Not implemented'); }\n  isFeatureSupported(featureDescriptor) { throw new Error('Not implemented'); }\n  async requestSession(mode, enabledFeatures) { throw new Error('Not implemented'); }\n  requestAnimationFrame(callback) { throw new Error('Not implemented'); }\n  onFrameStart(sessionId) { throw new Error('Not implemented'); }\n  onFrameEnd(sessionId) { throw new Error('Not implemented'); }\n  doesSessionSupportReferenceSpace(sessionId, type) { throw new Error('Not implemented'); }\n  requestStageBounds() { throw new Error('Not implemented'); }\n  async requestFrameOfReferenceTransform(type, options) {\n    return undefined;\n  }\n  cancelAnimationFrame(handle) { throw new Error('Not implemented'); }\n  endSession(sessionId) { throw new Error('Not implemented'); }\n  getViewport(sessionId, eye, layer, target) { throw new Error('Not implemented'); }\n  getProjectionMatrix(eye) { throw new Error('Not implemented'); }\n  getBasePoseMatrix() { throw new Error('Not implemented'); }\n  getBaseViewMatrix(eye) { throw new Error('Not implemented'); }\n  getInputSources() { throw new Error('Not implemented'); }\n  getInputPose(inputSource, coordinateSystem, poseType) { throw new Error('Not implemented'); }\n  onWindowResize() {\n    this.onWindowResize();\n  }\n}\n\nlet daydream = {\n  mapping: '',\n  profiles: ['google-daydream', 'generic-trigger-touchpad'],\n  buttons: {\n    length: 3,\n    0: null,\n    1: null,\n    2: 0\n  },\n};\nlet viveFocus = {\n  mapping: 'xr-standard',\n  profiles: ['htc-vive-focus', 'generic-trigger-touchpad'],\n  buttons: {\n    length: 3,\n    0: 1,\n    1: null,\n    2: 0\n  },\n};\nlet oculusGo = {\n  mapping: 'xr-standard',\n  profiles: ['oculus-go', 'generic-trigger-touchpad'],\n  buttons: {\n    length: 3,\n    0: 1,\n    1: null,\n    2: 0\n  },\n  gripTransform: {\n    orientation: [Math.PI * 0.11, 0, 0, 1]\n  }\n};\nlet oculusTouch = {\n  mapping: 'xr-standard',\n  displayProfiles: {\n    'Oculus Quest': ['oculus-touch-v2', 'oculus-touch', 'generic-trigger-squeeze-thumbstick']\n  },\n  profiles: ['oculus-touch', 'generic-trigger-squeeze-thumbstick'],\n  axes: {\n    length: 4,\n    0: null,\n    1: null,\n    2: 0,\n    3: 1\n  },\n  buttons: {\n    length: 7,\n    0: 1,\n    1: 2,\n    2: null,\n    3: 0,\n    4: 3,\n    5: 4,\n    6: null\n  },\n  gripTransform: {\n    position: [0, -0.02, 0.04, 1],\n    orientation: [Math.PI * 0.11, 0, 0, 1]\n  }\n};\nlet openVr = {\n  mapping: 'xr-standard',\n  profiles: ['htc-vive', 'generic-trigger-squeeze-touchpad'],\n  displayProfiles: {\n    'HTC Vive': ['htc-vive', 'generic-trigger-squeeze-touchpad'],\n    'HTC Vive DVT': ['htc-vive', 'generic-trigger-squeeze-touchpad'],\n    'Valve Index': ['valve-index', 'generic-trigger-squeeze-touchpad-thumbstick']\n  },\n  buttons: {\n    length: 3,\n    0: 1,\n    1: 2,\n    2: 0\n  },\n  gripTransform: {\n    position: [0, 0, 0.05, 1],\n  },\n  targetRayTransform: {\n    orientation: [Math.PI * -0.08, 0, 0, 1]\n  },\n  userAgentOverrides: {\n    \"Firefox\": {\n      axes: {\n        invert: [1, 3]\n      }\n    }\n  }\n};\nlet samsungGearVR = {\n  mapping: 'xr-standard',\n  profiles: ['samsung-gearvr', 'generic-trigger-touchpad'],\n  buttons: {\n    length: 3,\n    0: 1,\n    1: null,\n    2: 0\n  },\n  gripTransform: {\n    orientation: [Math.PI * 0.11, 0, 0, 1]\n  }\n};\nlet samsungOdyssey = {\n  mapping: 'xr-standard',\n  profiles: ['samsung-odyssey', 'microsoft-mixed-reality', 'generic-trigger-squeeze-touchpad-thumbstick'],\n  buttons: {\n    length: 4,\n    0: 1,\n    1: 0,\n    2: 2,\n    3: 4,\n  },\n  gripTransform: {\n    position: [0, -0.02, 0.04, 1],\n    orientation: [Math.PI * 0.11, 0, 0, 1]\n  }\n};\nlet windowsMixedReality = {\n  mapping: 'xr-standard',\n  profiles: ['microsoft-mixed-reality', 'generic-trigger-squeeze-touchpad-thumbstick'],\n  buttons: {\n    length: 4,\n    0: 1,\n    1: 0,\n    2: 2,\n    3: 4,\n  },\n  gripTransform: {\n    position: [0, -0.02, 0.04, 1],\n    orientation: [Math.PI * 0.11, 0, 0, 1]\n  }\n};\nlet GamepadMappings = {\n  'Daydream Controller': daydream,\n  'Gear VR Controller': samsungGearVR,\n  'HTC Vive Focus Controller': viveFocus,\n  'Oculus Go Controller': oculusGo,\n  'Oculus Touch (Right)': oculusTouch,\n  'Oculus Touch (Left)': oculusTouch,\n  'OpenVR Gamepad': openVr,\n  'Spatial Controller (Spatial Interaction Source) 045E-065A': windowsMixedReality,\n  'Spatial Controller (Spatial Interaction Source) 045E-065D': samsungOdyssey,\n  'Windows Mixed Reality (Right)': windowsMixedReality,\n  'Windows Mixed Reality (Left)': windowsMixedReality,\n};\n\nconst HEAD_ELBOW_OFFSET_RIGHTHANDED = fromValues$1(0.155, -0.465, -0.15);\nconst HEAD_ELBOW_OFFSET_LEFTHANDED = fromValues$1(-0.155, -0.465, -0.15);\nconst ELBOW_WRIST_OFFSET = fromValues$1(0, 0, -0.25);\nconst WRIST_CONTROLLER_OFFSET = fromValues$1(0, 0, 0.05);\nconst ARM_EXTENSION_OFFSET = fromValues$1(-0.08, 0.14, 0.08);\nconst ELBOW_BEND_RATIO = 0.4;\nconst EXTENSION_RATIO_WEIGHT = 0.4;\nconst MIN_ANGULAR_SPEED = 0.61;\nconst MIN_ANGLE_DELTA = 0.175;\nconst MIN_EXTENSION_COS = 0.12;\nconst MAX_EXTENSION_COS = 0.87;\nconst RAD_TO_DEG = 180 / Math.PI;\nfunction eulerFromQuaternion(out, q, order) {\n  function clamp(value, min$$1, max$$1) {\n    return (value < min$$1 ? min$$1 : (value > max$$1 ? max$$1 : value));\n  }\n  var sqx = q[0] * q[0];\n  var sqy = q[1] * q[1];\n  var sqz = q[2] * q[2];\n  var sqw = q[3] * q[3];\n  if ( order === 'XYZ' ) {\n    out[0] = Math.atan2( 2 * ( q[0] * q[3] - q[1] * q[2] ), ( sqw - sqx - sqy + sqz ) );\n    out[1] = Math.asin(  clamp( 2 * ( q[0] * q[2] + q[1] * q[3] ), -1, 1 ) );\n    out[2] = Math.atan2( 2 * ( q[2] * q[3] - q[0] * q[1] ), ( sqw + sqx - sqy - sqz ) );\n  } else if ( order ===  'YXZ' ) {\n    out[0] = Math.asin(  clamp( 2 * ( q[0] * q[3] - q[1] * q[2] ), -1, 1 ) );\n    out[1] = Math.atan2( 2 * ( q[0] * q[2] + q[1] * q[3] ), ( sqw - sqx - sqy + sqz ) );\n    out[2] = Math.atan2( 2 * ( q[0] * q[1] + q[2] * q[3] ), ( sqw - sqx + sqy - sqz ) );\n  } else if ( order === 'ZXY' ) {\n    out[0] = Math.asin(  clamp( 2 * ( q[0] * q[3] + q[1] * q[2] ), -1, 1 ) );\n    out[1] = Math.atan2( 2 * ( q[1] * q[3] - q[2] * q[0] ), ( sqw - sqx - sqy + sqz ) );\n    out[2] = Math.atan2( 2 * ( q[2] * q[3] - q[0] * q[1] ), ( sqw - sqx + sqy - sqz ) );\n  } else if ( order === 'ZYX' ) {\n    out[0] = Math.atan2( 2 * ( q[0] * q[3] + q[2] * q[1] ), ( sqw - sqx - sqy + sqz ) );\n    out[1] = Math.asin(  clamp( 2 * ( q[1] * q[3] - q[0] * q[2] ), -1, 1 ) );\n    out[2] = Math.atan2( 2 * ( q[0] * q[1] + q[2] * q[3] ), ( sqw + sqx - sqy - sqz ) );\n  } else if ( order === 'YZX' ) {\n    out[0] = Math.atan2( 2 * ( q[0] * q[3] - q[2] * q[1] ), ( sqw - sqx + sqy - sqz ) );\n    out[1] = Math.atan2( 2 * ( q[1] * q[3] - q[0] * q[2] ), ( sqw + sqx - sqy - sqz ) );\n    out[2] = Math.asin(  clamp( 2 * ( q[0] * q[1] + q[2] * q[3] ), -1, 1 ) );\n  } else if ( order === 'XZY' ) {\n    out[0] = Math.atan2( 2 * ( q[0] * q[3] + q[1] * q[2] ), ( sqw - sqx + sqy - sqz ) );\n    out[1] = Math.atan2( 2 * ( q[0] * q[2] + q[1] * q[3] ), ( sqw + sqx - sqy - sqz ) );\n    out[2] = Math.asin(  clamp( 2 * ( q[2] * q[3] - q[0] * q[1] ), -1, 1 ) );\n  } else {\n    console.log('No order given for quaternion to euler conversion.');\n    return;\n  }\n}\nclass OrientationArmModel {\n  constructor() {\n    this.hand = 'right';\n    this.headElbowOffset = HEAD_ELBOW_OFFSET_RIGHTHANDED;\n    this.controllerQ = create$4();\n    this.lastControllerQ = create$4();\n    this.headQ = create$4();\n    this.headPos = create$1();\n    this.elbowPos = create$1();\n    this.wristPos = create$1();\n    this.time = null;\n    this.lastTime = null;\n    this.rootQ = create$4();\n    this.position = create$1();\n  }\n  setHandedness(hand) {\n    if (this.hand != hand) {\n      this.hand = hand;\n      if (this.hand == 'left') {\n        this.headElbowOffset = HEAD_ELBOW_OFFSET_LEFTHANDED;\n      } else {\n        this.headElbowOffset = HEAD_ELBOW_OFFSET_RIGHTHANDED;\n      }\n    }\n  }\n  update(controllerOrientation, headPoseMatrix) {\n    this.time = now$1();\n    if (controllerOrientation) {\n      copy$4(this.lastControllerQ, this.controllerQ);\n      copy$4(this.controllerQ, controllerOrientation);\n    }\n    if (headPoseMatrix) {\n      getTranslation(this.headPos, headPoseMatrix);\n      getRotation(this.headQ, headPoseMatrix);\n    }\n    let headYawQ = this.getHeadYawOrientation_();\n    let angleDelta = this.quatAngle_(this.lastControllerQ, this.controllerQ);\n    let timeDelta = (this.time - this.lastTime) / 1000;\n    let controllerAngularSpeed = angleDelta / timeDelta;\n    if (controllerAngularSpeed > MIN_ANGULAR_SPEED) {\n      slerp(this.rootQ, this.rootQ, headYawQ,\n                 Math.min(angleDelta / MIN_ANGLE_DELTA, 1.0));\n    } else {\n      copy$4(this.rootQ, headYawQ);\n    }\n    let controllerForward = fromValues$1(0, 0, -1.0);\n    transformQuat(controllerForward, controllerForward, this.controllerQ);\n    let controllerDotY = dot(controllerForward, [0, 1, 0]);\n    let extensionRatio = this.clamp_(\n        (controllerDotY - MIN_EXTENSION_COS) / MAX_EXTENSION_COS, 0.0, 1.0);\n    let controllerCameraQ = clone$4(this.rootQ);\n    invert$2(controllerCameraQ, controllerCameraQ);\n    multiply$4(controllerCameraQ, controllerCameraQ, this.controllerQ);\n    let elbowPos = this.elbowPos;\n    copy$1(elbowPos, this.headPos);\n    add$1(elbowPos, elbowPos, this.headElbowOffset);\n    let elbowOffset = clone$1(ARM_EXTENSION_OFFSET);\n    scale$1(elbowOffset, elbowOffset, extensionRatio);\n    add$1(elbowPos, elbowPos, elbowOffset);\n    let totalAngle = this.quatAngle_(controllerCameraQ, create$4());\n    let totalAngleDeg = totalAngle * RAD_TO_DEG;\n    let lerpSuppression = 1 - Math.pow(totalAngleDeg / 180, 4);let elbowRatio = ELBOW_BEND_RATIO;\n    let wristRatio = 1 - ELBOW_BEND_RATIO;\n    let lerpValue = lerpSuppression *\n        (elbowRatio + wristRatio * extensionRatio * EXTENSION_RATIO_WEIGHT);\n    let wristQ = create$4();\n    slerp(wristQ, wristQ, controllerCameraQ, lerpValue);\n    let invWristQ = invert$2(create$4(), wristQ);\n    let elbowQ = clone$4(controllerCameraQ);\n    multiply$4(elbowQ, elbowQ, invWristQ);\n    let wristPos = this.wristPos;\n    copy$1(wristPos, WRIST_CONTROLLER_OFFSET);\n    transformQuat(wristPos, wristPos, wristQ);\n    add$1(wristPos, wristPos, ELBOW_WRIST_OFFSET);\n    transformQuat(wristPos, wristPos, elbowQ);\n    add$1(wristPos, wristPos, elbowPos);\n    let offset = clone$1(ARM_EXTENSION_OFFSET);\n    scale$1(offset, offset, extensionRatio);\n    add$1(this.position, this.wristPos, offset);\n    transformQuat(this.position, this.position, this.rootQ);\n    this.lastTime = this.time;\n  }\n  getPosition() {\n    return this.position;\n  }\n  getHeadYawOrientation_() {\n    let headEuler = create$1();\n    eulerFromQuaternion(headEuler, this.headQ, 'YXZ');\n    let destinationQ = fromEuler(create$4(), 0, headEuler[1] * RAD_TO_DEG, 0);\n    return destinationQ;\n  }\n  clamp_(value, min$$1, max$$1) {\n    return Math.min(Math.max(value, min$$1), max$$1);\n  }\n  quatAngle_(q1, q2) {\n    let vec1 = [0, 0, -1];\n    let vec2 = [0, 0, -1];\n    transformQuat(vec1, vec1, q1);\n    transformQuat(vec2, vec2, q2);\n    return angle(vec1, vec2);\n  }\n}\n\nconst PRIVATE$18 = Symbol('@@webxr-polyfill/XRRemappedGamepad');\nconst PLACEHOLDER_BUTTON = { pressed: false, touched: false, value: 0.0 };\nObject.freeze(PLACEHOLDER_BUTTON);\nclass XRRemappedGamepad {\n  constructor(gamepad, display, map) {\n    if (!map) {\n      map = {};\n    }\n    if (map.userAgentOverrides) {\n      for (let agent in map.userAgentOverrides) {\n        if (navigator.userAgent.includes(agent)) {\n          let override = map.userAgentOverrides[agent];\n          for (let key in override) {\n            if (key in map) {\n              Object.assign(map[key], override[key]);\n            } else {\n              map[key] = override[key];\n            }\n          }\n          break;\n        }\n      }\n    }\n    let axes = new Array(map.axes && map.axes.length ? map.axes.length : gamepad.axes.length);\n    let buttons = new Array(map.buttons && map.buttons.length ? map.buttons.length : gamepad.buttons.length);\n    let gripTransform = null;\n    if (map.gripTransform) {\n      let orientation = map.gripTransform.orientation || [0, 0, 0, 1];\n      gripTransform = create();\n      fromRotationTranslation(\n        gripTransform,\n        normalize$2(orientation, orientation),\n        map.gripTransform.position || [0, 0, 0]\n      );\n    }\n    let targetRayTransform = null;\n    if (map.targetRayTransform) {\n      let orientation =  map.targetRayTransform.orientation || [0, 0, 0, 1];\n      targetRayTransform = create();\n      fromRotationTranslation(\n        targetRayTransform,\n        normalize$2(orientation, orientation),\n        map.targetRayTransform.position || [0, 0, 0]\n      );\n    }\n    let profiles = map.profiles;\n    if (map.displayProfiles) {\n      if (display.displayName in map.displayProfiles) {\n        profiles = map.displayProfiles[display.displayName];\n      }\n    }\n    this[PRIVATE$18] = {\n      gamepad,\n      map,\n      profiles: profiles || [gamepad.id],\n      mapping: map.mapping || gamepad.mapping,\n      axes,\n      buttons,\n      gripTransform,\n      targetRayTransform,\n    };\n    this._update();\n  }\n  _update() {\n    let gamepad = this[PRIVATE$18].gamepad;\n    let map = this[PRIVATE$18].map;\n    let axes = this[PRIVATE$18].axes;\n    for (let i = 0; i < axes.length; ++i) {\n      if (map.axes && i in map.axes) {\n        if (map.axes[i] === null) {\n          axes[i] = 0;\n        } else {\n          axes[i] = gamepad.axes[map.axes[i]];\n        }\n      } else {\n        axes[i] = gamepad.axes[i];\n      }\n    }\n    if (map.axes && map.axes.invert) {\n      for (let axis of map.axes.invert) {\n        if (axis < axes.length) {\n          axes[axis] *= -1;\n        }\n      }\n    }\n    let buttons = this[PRIVATE$18].buttons;\n    for (let i = 0; i < buttons.length; ++i) {\n      if (map.buttons && i in map.buttons) {\n        if (map.buttons[i] === null) {\n          buttons[i] = PLACEHOLDER_BUTTON;\n        } else {\n          buttons[i] = gamepad.buttons[map.buttons[i]];\n        }\n      } else {\n        buttons[i] = gamepad.buttons[i];\n      }\n    }\n  }\n  get id() {\n    return '';\n  }\n  get _profiles() {\n    return this[PRIVATE$18].profiles;\n  }\n  get index() {\n    return -1;\n  }\n  get connected() {\n    return this[PRIVATE$18].gamepad.connected;\n  }\n  get timestamp() {\n    return this[PRIVATE$18].gamepad.timestamp;\n  }\n  get mapping() {\n    return this[PRIVATE$18].mapping;\n  }\n  get axes() {\n    return this[PRIVATE$18].axes;\n  }\n  get buttons() {\n    return this[PRIVATE$18].buttons;\n  }\n  get hapticActuators() {\n    return this[PRIVATE$18].gamepad.hapticActuators;\n  }\n}\nclass GamepadXRInputSource {\n  constructor(polyfill, display, primaryButtonIndex = 0, primarySqueezeButtonIndex = -1) {\n    this.polyfill = polyfill;\n    this.display = display;\n    this.nativeGamepad = null;\n    this.gamepad = null;\n    this.inputSource = new XRInputSource(this);\n    this.lastPosition = create$1();\n    this.emulatedPosition = false;\n    this.basePoseMatrix = create();\n    this.outputMatrix = create();\n    this.primaryButtonIndex = primaryButtonIndex;\n    this.primaryActionPressed = false;\n    this.primarySqueezeButtonIndex = primarySqueezeButtonIndex;\n    this.primarySqueezeActionPressed = false;\n    this.handedness = '';\n    this.targetRayMode = 'gaze';\n    this.armModel = null;\n  }\n  get profiles() {\n    return this.gamepad ? this.gamepad._profiles : [];\n  }\n  updateFromGamepad(gamepad) {\n    if (this.nativeGamepad !== gamepad) {\n      this.nativeGamepad = gamepad;\n      if (gamepad) {\n        this.gamepad = new XRRemappedGamepad(gamepad, this.display, GamepadMappings[gamepad.id]);\n      } else {\n        this.gamepad = null;\n      }\n    }\n    this.handedness = gamepad.hand === '' ? 'none' : gamepad.hand;\n    if (this.gamepad) {\n      this.gamepad._update();\n    }\n    if (gamepad.pose) {\n      this.targetRayMode = 'tracked-pointer';\n      this.emulatedPosition = !gamepad.pose.hasPosition;\n    } else if (gamepad.hand === '') {\n      this.targetRayMode = 'gaze';\n      this.emulatedPosition = false;\n    }\n  }\n  updateBasePoseMatrix() {\n    if (this.nativeGamepad && this.nativeGamepad.pose) {\n      let pose = this.nativeGamepad.pose;\n      let position = pose.position;\n      let orientation = pose.orientation;\n      if (!position && !orientation) {\n        return;\n      }\n      if (!position) {\n        if (!pose.hasPosition) {\n          if (!this.armModel) {\n            this.armModel = new OrientationArmModel();\n          }\n          this.armModel.setHandedness(this.nativeGamepad.hand);\n          this.armModel.update(orientation, this.polyfill.getBasePoseMatrix());\n          position = this.armModel.getPosition();\n        } else {\n          position = this.lastPosition;\n        }\n      } else {\n        this.lastPosition[0] = position[0];\n        this.lastPosition[1] = position[1];\n        this.lastPosition[2] = position[2];\n      }\n      fromRotationTranslation(this.basePoseMatrix, orientation, position);\n    } else {\n      copy(this.basePoseMatrix, this.polyfill.getBasePoseMatrix());\n    }\n    return this.basePoseMatrix;\n  }\n  getXRPose(coordinateSystem, poseType) {\n    this.updateBasePoseMatrix();\n    switch(poseType) {\n      case \"target-ray\":\n        coordinateSystem._transformBasePoseMatrix(this.outputMatrix, this.basePoseMatrix);\n        if (this.gamepad && this.gamepad[PRIVATE$18].targetRayTransform) {\n          multiply$1(this.outputMatrix, this.outputMatrix, this.gamepad[PRIVATE$18].targetRayTransform);\n        }\n        break;\n      case \"grip\":\n        if (!this.nativeGamepad || !this.nativeGamepad.pose) {\n          return null;\n        }\n        coordinateSystem._transformBasePoseMatrix(this.outputMatrix, this.basePoseMatrix);\n        if (this.gamepad && this.gamepad[PRIVATE$18].gripTransform) {\n          multiply$1(this.outputMatrix, this.outputMatrix, this.gamepad[PRIVATE$18].gripTransform);\n        }\n        break;\n      default:\n        return null;\n    }\n    coordinateSystem._adjustForOriginOffset(this.outputMatrix);\n    return new XRPose(new XRRigidTransform(this.outputMatrix), this.emulatedPosition);\n  }\n}\n\nconst TEST_ENV = \"production\" === 'test';\nconst EXTRA_PRESENTATION_ATTRIBUTES = {\n  highRefreshRate: true,\n};\nconst PRIMARY_BUTTON_MAP = {\n  oculus: 1,\n  openvr: 1,\n  'spatial controller (spatial interaction source)': 1\n};\nlet SESSION_ID = 0;\nclass Session {\n  constructor(mode, enabledFeatures, polyfillOptions={}) {\n    this.mode = mode;\n    this.enabledFeatures = enabledFeatures;\n    this.outputContext = null;\n    this.immersive = mode == 'immersive-vr' || mode == 'immersive-ar';\n    this.ended = null;\n    this.baseLayer = null;\n    this.id = ++SESSION_ID;\n    this.modifiedCanvasLayer = false;\n    if (this.outputContext && !TEST_ENV) {\n      const renderContextType = polyfillOptions.renderContextType || '2d';\n      this.renderContext = this.outputContext.canvas.getContext(renderContextType);\n    }\n  }\n}\nclass WebVRDevice extends XRDevice {\n  constructor(global, display) {\n    const { canPresent } = display.capabilities;\n    super(global);\n    this.display = display;\n    this.frame = new global.VRFrameData();\n    this.sessions = new Map();\n    this.immersiveSession = null;\n    this.canPresent = canPresent;\n    this.baseModelMatrix = create();\n    this.gamepadInputSources = {};\n    this.tempVec3 = new Float32Array(3);\n    this.onVRDisplayPresentChange = this.onVRDisplayPresentChange.bind(this);\n    global.window.addEventListener('vrdisplaypresentchange', this.onVRDisplayPresentChange);\n    this.CAN_USE_GAMEPAD = global.navigator && ('getGamepads' in global.navigator);\n    this.HAS_BITMAP_SUPPORT = isImageBitmapSupported(global);\n  }\n  get depthNear() { return this.display.depthNear; }\n  set depthNear(val) { this.display.depthNear = val; }\n  get depthFar() { return this.display.depthFar; }\n  set depthFar(val) { this.display.depthFar = val; }\n  onBaseLayerSet(sessionId, layer) {\n    const session = this.sessions.get(sessionId);\n    const canvas = layer.context.canvas;\n    if (session.immersive) {\n      const left = this.display.getEyeParameters('left');\n      const right = this.display.getEyeParameters('right');\n      canvas.width = Math.max(left.renderWidth, right.renderWidth) * 2;\n      canvas.height = Math.max(left.renderHeight, right.renderHeight);\n      this.display.requestPresent([{\n          source: canvas, attributes: EXTRA_PRESENTATION_ATTRIBUTES\n        }]).then(() => {\n        if ( !this.global.document.body.contains(canvas)) {\n          session.modifiedCanvasLayer = true;\n          this.global.document.body.appendChild(canvas);\n          applyCanvasStylesForMinimalRendering(canvas);\n        }\n        session.baseLayer = layer;\n      });\n    }\n    else {\n      session.baseLayer = layer;\n    }\n  }\n  isSessionSupported(mode) {\n    if (mode == 'immersive-ar') {\n      return false;\n    }\n    if (mode == 'immersive-vr' && this.canPresent === false) {\n      return false;\n    }\n    return true;\n  }\n  isFeatureSupported(featureDescriptor) {\n    switch(featureDescriptor) {\n      case 'viewer': return true;\n      case 'local': return true;\n      case 'local-floor': return true;\n      case 'bounded': return false;\n      case 'unbounded': return false;\n      default: return false;\n    }\n  }\n  async requestSession(mode, enabledFeatures) {\n    if (!this.isSessionSupported(mode)) {\n      return Promise.reject();\n    }\n    let immersive = mode == 'immersive-vr';\n    if (immersive) {\n      const canvas = this.global.document.createElement('canvas');\n      {\n        const ctx = canvas.getContext('webgl');\n      }\n      await this.display.requestPresent([{\n          source: canvas, attributes: EXTRA_PRESENTATION_ATTRIBUTES }]);\n    }\n    const session = new Session(mode, enabledFeatures, {\n      renderContextType: this.HAS_BITMAP_SUPPORT ? 'bitmaprenderer' : '2d'\n    });\n    this.sessions.set(session.id, session);\n    if (immersive) {\n      this.immersiveSession = session;\n      this.dispatchEvent('@@webxr-polyfill/vr-present-start', session.id);\n    }\n    return Promise.resolve(session.id);\n  }\n  requestAnimationFrame(callback) {\n    return this.display.requestAnimationFrame(callback);\n  }\n  getPrimaryButtonIndex(gamepad) {\n    let primaryButton = 0;\n    let name = gamepad.id.toLowerCase();\n    for (let key in PRIMARY_BUTTON_MAP) {\n      if (name.includes(key)) {\n        primaryButton = PRIMARY_BUTTON_MAP[key];\n        break;\n      }\n    }\n    return Math.min(primaryButton, gamepad.buttons.length - 1);\n  }\n  onFrameStart(sessionId, renderState) {\n    this.display.depthNear = renderState.depthNear;\n    this.display.depthFar = renderState.depthFar;\n    this.display.getFrameData(this.frame);\n    const session = this.sessions.get(sessionId);\n    if (session.immersive && this.CAN_USE_GAMEPAD) {\n      let prevInputSources = this.gamepadInputSources;\n      this.gamepadInputSources = {};\n      let gamepads = this.global.navigator.getGamepads();\n      for (let i = 0; i < gamepads.length; ++i) {\n        let gamepad = gamepads[i];\n        if (gamepad && gamepad.displayId > 0) {\n          let inputSourceImpl = prevInputSources[i];\n          if (!inputSourceImpl) {\n            inputSourceImpl = new GamepadXRInputSource(this, this.display, this.getPrimaryButtonIndex(gamepad));\n          }\n          inputSourceImpl.updateFromGamepad(gamepad);\n          this.gamepadInputSources[i] = inputSourceImpl;\n          if (inputSourceImpl.primaryButtonIndex != -1) {\n            let primaryActionPressed = gamepad.buttons[inputSourceImpl.primaryButtonIndex].pressed;\n            if (primaryActionPressed && !inputSourceImpl.primaryActionPressed) {\n              this.dispatchEvent('@@webxr-polyfill/input-select-start', { sessionId: session.id, inputSource: inputSourceImpl.inputSource });\n            } else if (!primaryActionPressed && inputSourceImpl.primaryActionPressed) {\n              this.dispatchEvent('@@webxr-polyfill/input-select-end', { sessionId: session.id, inputSource: inputSourceImpl.inputSource });\n            }\n            inputSourceImpl.primaryActionPressed = primaryActionPressed;\n          }\n          if (inputSourceImpl.primarySqueezeButtonIndex != -1) {\n            let primarySqueezeActionPressed = gamepad.buttons[inputSourceImpl.primarySqueezeButtonIndex].pressed;\n            if (primarySqueezeActionPressed && !inputSourceImpl.primarySqueezeActionPressed) {\n              this.dispatchEvent('@@webxr-polyfill/input-squeeze-start', { sessionId: session.id, inputSource: inputSourceImpl.inputSource });\n            } else if (!primarySqueezeActionPressed && inputSourceImpl.primarySqueezeActionPressed) {\n              this.dispatchEvent('@@webxr-polyfill/input-squeeze-end', { sessionId: session.id, inputSource: inputSourceImpl.inputSource });\n            }\n            inputSourceImpl.primarySqueezeActionPressed = primarySqueezeActionPressed;\n          }\n        }\n      }\n    }\n    if (!session.immersive && session.baseLayer) {\n      const canvas = session.baseLayer.context.canvas;\n      perspective(this.frame.leftProjectionMatrix, renderState.inlineVerticalFieldOfView,\n          canvas.width/canvas.height, renderState.depthNear, renderState.depthFar);\n    }\n  }\n  onFrameEnd(sessionId) {\n    const session = this.sessions.get(sessionId);\n    if (session.ended || !session.baseLayer) {\n      return;\n    }\n    if (session.outputContext &&\n        !(session.immersive && !this.display.capabilities.hasExternalDisplay)) {\n      const mirroring =\n        session.immersive && this.display.capabilities.hasExternalDisplay;\n      const iCanvas = session.baseLayer.context.canvas;\n      const iWidth = mirroring ? iCanvas.width / 2 : iCanvas.width;\n      const iHeight = iCanvas.height;\n      {\n        const oCanvas = session.outputContext.canvas;\n        const oWidth = oCanvas.width;\n        const oHeight = oCanvas.height;\n        const renderContext = session.renderContext;\n        if (this.HAS_BITMAP_SUPPORT) {\n          if (iCanvas.transferToImageBitmap) {\n            renderContext.transferFromImageBitmap(iCanvas.transferToImageBitmap());\n          }\n          else {\n            this.global.createImageBitmap(iCanvas, 0, 0, iWidth, iHeight, {\n              resizeWidth: oWidth,\n              resizeHeight: oHeight,\n            }).then(bitmap => renderContext.transferFromImageBitmap(bitmap));\n          }\n        } else {\n          renderContext.drawImage(iCanvas, 0, 0, iWidth, iHeight,\n                                           0, 0, oWidth, oHeight);\n        }\n      }\n    }\n    if (session.immersive && session.baseLayer) {\n      this.display.submitFrame();\n    }\n  }\n  cancelAnimationFrame(handle) {\n    this.display.cancelAnimationFrame(handle);\n  }\n  async endSession(sessionId) {\n    const session = this.sessions.get(sessionId);\n    if (session.ended) {\n      return;\n    }\n    if (session.immersive) {\n      return this.display.exitPresent();\n    } else {\n      session.ended = true;\n    }\n  }\n  doesSessionSupportReferenceSpace(sessionId, type) {\n    const session = this.sessions.get(sessionId);\n    if (session.ended) {\n      return false;\n    }\n    return session.enabledFeatures.has(type);\n  }\n  requestStageBounds() {\n    if (this.display.stageParameters) {\n      const width = this.display.stageParameters.sizeX;\n      const depth = this.display.stageParameters.sizeZ;\n      const data = [];\n      data.push(-width / 2);\n      data.push(-depth / 2);\n      data.push(width / 2);\n      data.push(-depth / 2);\n      data.push(width / 2);\n      data.push(depth / 2);\n      data.push(-width / 2);\n      data.push(depth / 2);\n      return data;\n    }\n    return null;\n  }\n  async requestFrameOfReferenceTransform(type, options) {\n    if ((type === 'local-floor' || type === 'bounded-floor') &&\n        this.display.stageParameters &&\n        this.display.stageParameters.sittingToStandingTransform) {\n      return this.display.stageParameters.sittingToStandingTransform;\n    }\n    return null;\n  }\n  getProjectionMatrix(eye) {\n    if (eye === 'left') {\n      return this.frame.leftProjectionMatrix;\n    } else if (eye === 'right') {\n      return this.frame.rightProjectionMatrix;\n    } else if (eye === 'none') {\n      return this.frame.leftProjectionMatrix;\n    } else {\n      throw new Error(`eye must be of type 'left' or 'right'`);\n    }\n  }\n  getViewport(sessionId, eye, layer, target) {\n    const session = this.sessions.get(sessionId);\n    const { width, height } = layer.context.canvas;\n    if (!session.immersive) {\n      target.x = target.y = 0;\n      target.width = width;\n      target.height = height;\n      return true;\n    }\n    if (eye === 'left' || eye === 'none') {\n      target.x = 0;\n    } else if (eye === 'right') {\n      target.x = width / 2;\n    } else {\n      return false;\n    }\n    target.y = 0;\n    target.width = width / 2;\n    target.height = height;\n    return true;\n  }\n  getBasePoseMatrix() {\n    let { position, orientation } = this.frame.pose;\n    if (!position && !orientation) {\n      return this.baseModelMatrix;\n    }\n    if (!position) {\n      position = this.tempVec3;\n      position[0] = position[1] = position[2] = 0;\n    }\n    fromRotationTranslation(this.baseModelMatrix, orientation, position);\n    return this.baseModelMatrix;\n  }\n  getBaseViewMatrix(eye) {\n    if (eye === 'left' || eye === 'none') {\n      return this.frame.leftViewMatrix;\n    } else if (eye === 'right') {\n      return this.frame.rightViewMatrix;\n    } else {\n      throw new Error(`eye must be of type 'left' or 'right'`);\n    }\n  }\n  getInputSources() {\n    let inputSources = [];\n    for (let i in this.gamepadInputSources) {\n      inputSources.push(this.gamepadInputSources[i].inputSource);\n    }\n    return inputSources;\n  }\n  getInputPose(inputSource, coordinateSystem, poseType) {\n    if (!coordinateSystem) {\n      return null;\n    }\n    for (let i in this.gamepadInputSources) {\n      let inputSourceImpl = this.gamepadInputSources[i];\n      if (inputSourceImpl.inputSource === inputSource) {\n        return inputSourceImpl.getXRPose(coordinateSystem, poseType);\n      }\n    }\n    return null;\n  }\n  onWindowResize() {\n  }\n  onVRDisplayPresentChange(e) {\n    if (!this.display.isPresenting) {\n      this.sessions.forEach(session => {\n        if (session.immersive && !session.ended) {\n          if (session.modifiedCanvasLayer) {\n            const canvas = session.baseLayer.context.canvas;\n            document.body.removeChild(canvas);\n            canvas.setAttribute('style', '');\n          }\n          if (this.immersiveSession === session) {\n            this.immersiveSession = null;\n          }\n          this.dispatchEvent('@@webxr-polyfill/vr-present-end', session.id);\n        }\n      });\n    }\n  }\n}\n\nclass CardboardXRDevice extends WebVRDevice {\n  constructor(global, cardboardConfig) {\n    const display = new CardboardVRDisplay(cardboardConfig || {});\n    super(global, display);\n    this.display = display;\n    this.frame = {\n      rightViewMatrix: new Float32Array(16),\n      leftViewMatrix: new Float32Array(16),\n      rightProjectionMatrix: new Float32Array(16),\n      leftProjectionMatrix: new Float32Array(16),\n      pose: null,\n      timestamp: null,\n    };\n  }\n}\nlet SESSION_ID$1 = 0;\nclass Session$1 {\n  constructor(mode, enabledFeatures) {\n    this.mode = mode;\n    this.enabledFeatures = enabledFeatures;\n    this.ended = null;\n    this.baseLayer = null;\n    this.id = ++SESSION_ID$1;\n  }\n}\nclass InlineDevice extends XRDevice {\n  constructor(global) {\n    super(global);\n    this.sessions = new Map();\n    this.projectionMatrix = create();\n    this.identityMatrix = create();\n  }\n  onBaseLayerSet(sessionId, layer) {\n    const session = this.sessions.get(sessionId);\n    session.baseLayer = layer;\n  }\n  isSessionSupported(mode) {\n    return mode == 'inline';\n  }\n  isFeatureSupported(featureDescriptor) {\n    switch(featureDescriptor) {\n      case 'viewer': return true;\n      default: return false;\n    }\n  }\n  async requestSession(mode, enabledFeatures) {\n    if (!this.isSessionSupported(mode)) {\n      return Promise.reject();\n    }\n    const session = new Session$1(mode, enabledFeatures);\n    this.sessions.set(session.id, session);\n    return Promise.resolve(session.id);\n  }\n  requestAnimationFrame(callback) {\n    return window.requestAnimationFrame(callback);\n  }\n  cancelAnimationFrame(handle) {\n    window.cancelAnimationFrame(handle);\n  }\n  onFrameStart(sessionId, renderState) {\n    const session = this.sessions.get(sessionId);\n    if (session.baseLayer) {\n      const canvas = session.baseLayer.context.canvas;\n      perspective(this.projectionMatrix, renderState.inlineVerticalFieldOfView,\n          canvas.width/canvas.height, renderState.depthNear, renderState.depthFar);\n    }\n  }\n  onFrameEnd(sessionId) {\n  }\n  async endSession(sessionId) {\n    const session = this.sessions.get(sessionId);\n    session.ended = true;\n  }\n  doesSessionSupportReferenceSpace(sessionId, type) {\n    const session = this.sessions.get(sessionId);\n    if (session.ended) {\n      return false;\n    }\n    return session.enabledFeatures.has(type);\n  }\n  requestStageBounds() {\n    return null;\n  }\n  async requestFrameOfReferenceTransform(type, options) {\n    return null;\n  }\n  getProjectionMatrix(eye) {\n    return this.projectionMatrix;\n  }\n  getViewport(sessionId, eye, layer, target) {\n    const session = this.sessions.get(sessionId);\n    const { width, height } = layer.context.canvas;\n    target.x = target.y = 0;\n    target.width = width;\n    target.height = height;\n    return true;\n  }\n  getBasePoseMatrix() {\n    return this.identityMatrix;\n  }\n  getBaseViewMatrix(eye) {\n    return this.identityMatrix;\n  }\n  getInputSources() {\n    return [];\n  }\n  getInputPose(inputSource, coordinateSystem, poseType) {\n    return null;\n  }\n  onWindowResize() {\n  }\n}\n\nconst getWebVRDevice = async function (global) {\n  let device = null;\n  if ('getVRDisplays' in global.navigator) {\n    try {\n      const displays = await global.navigator.getVRDisplays();\n      if (displays && displays.length) {\n        device = new WebVRDevice(global, displays[0]);\n      }\n    } catch (e) {}\n  }\n  return device;\n};\nconst requestXRDevice = async function (global, config) {\n  if (config.webvr) {\n    let xr = await getWebVRDevice(global);\n    if (xr) {\n      return xr;\n    }\n  }\n  let mobile = isMobile(global);\n  if ((mobile && config.cardboard) ||\n      (!mobile && config.allowCardboardOnDesktop)) {\n    if (!global.VRFrameData) {\n      global.VRFrameData = function () {\n        this.rightViewMatrix = new Float32Array(16);\n        this.leftViewMatrix = new Float32Array(16);\n        this.rightProjectionMatrix = new Float32Array(16);\n        this.leftProjectionMatrix = new Float32Array(16);\n        this.pose = null;\n      };\n    }\n    return new CardboardXRDevice(global, config.cardboardConfig);\n  }\n  return new InlineDevice(global);\n};\n\nconst CONFIG_DEFAULTS = {\n  global: _global$1,\n  webvr: true,\n  cardboard: true,\n  cardboardConfig: null,\n  allowCardboardOnDesktop: false,\n};\nconst partials = ['navigator', 'HTMLCanvasElement', 'WebGLRenderingContext'];\nclass WebXRPolyfill {\n  constructor(config={}) {\n    this.config = Object.freeze(Object.assign({}, CONFIG_DEFAULTS, config));\n    this.global = this.config.global;\n    this.nativeWebXR = 'xr' in this.global.navigator;\n    this.injected = false;\n    if (!this.nativeWebXR) {\n      this._injectPolyfill(this.global);\n    } else {\n      this._injectCompatibilityShims(this.global);\n    }\n  }\n  _injectPolyfill(global) {\n    if (!partials.every(iface => !!global[iface])) {\n      throw new Error(`Global must have the following attributes : ${partials}`);\n    }\n    for (const className of Object.keys(API)) {\n      if (global[className] !== undefined) {\n        console.warn(`${className} already defined on global.`);\n      } else {\n        global[className] = API[className];\n      }\n    }\n    {\n      const polyfilledCtx = polyfillMakeXRCompatible(global.WebGLRenderingContext);\n      if (polyfilledCtx) {\n        polyfillGetContext(global.HTMLCanvasElement);\n        if (global.OffscreenCanvas) {\n          polyfillGetContext(global.OffscreenCanvas);\n        }\n        if (global.WebGL2RenderingContext){\n          polyfillMakeXRCompatible(global.WebGL2RenderingContext);\n        }\n        if (!window.isSecureContext) {\n          console.warn(`WebXR Polyfill Warning:\nThis page is not running in a secure context (https:// or localhost)!\nThis means that although the page may be able to use the WebXR Polyfill it will\nnot be able to use native WebXR implementations, and as such will not be able to\naccess dedicated VR or AR hardware, and will not be able to take advantage of\nany performance improvements a native WebXR implementation may offer. Please\nhost this content on a secure origin for the best user experience.\n`);\n        }\n      }\n    }\n    this.injected = true;\n    this._patchNavigatorXR();\n  }\n  _patchNavigatorXR() {\n    let devicePromise = requestXRDevice(this.global, this.config);\n    this.xr = new API.XRSystem(devicePromise);\n    Object.defineProperty(this.global.navigator, 'xr', {\n      value: this.xr,\n      configurable: true,\n    });\n  }\n  _injectCompatibilityShims(global) {\n    if (!partials.every(iface => !!global[iface])) {\n      throw new Error(`Global must have the following attributes : ${partials}`);\n    }\n    if (global.navigator.xr &&\n        'supportsSession' in global.navigator.xr &&\n        !('isSessionSupported' in global.navigator.xr)) {\n      let originalSupportsSession = global.navigator.xr.supportsSession;\n      global.navigator.xr.isSessionSupported = function(mode) {\n        return originalSupportsSession.call(this, mode).then(() => {\n          return true;\n        }).catch(() => {\n          return false;\n        });\n      };\n      global.navigator.xr.supportsSession = function(mode) {\n        console.warn(\"navigator.xr.supportsSession() is deprecated. Please \" +\n        \"call navigator.xr.isSessionSupported() instead and check the boolean \" +\n        \"value returned when the promise resolves.\");\n        return originalSupportsSession.call(this, mode);\n      };\n    }\n  }\n}\n\n// Polyfills\n\nif ( Number.EPSILON === undefined ) {\n\n\tNumber.EPSILON = Math.pow( 2, - 52 );\n\n}\n\nif ( Number.isInteger === undefined ) {\n\n\t// Missing in IE\n\t// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isInteger\n\n\tNumber.isInteger = function ( value ) {\n\n\t\treturn typeof value === 'number' && isFinite( value ) && Math.floor( value ) === value;\n\n\t};\n\n}\n\n//\n\nif ( Math.sign === undefined ) {\n\n\t// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/sign\n\n\tMath.sign = function ( x ) {\n\n\t\treturn ( x < 0 ) ? - 1 : ( x > 0 ) ? 1 : + x;\n\n\t};\n\n}\n\nif ( 'name' in Function.prototype === false ) {\n\n\t// Missing in IE\n\t// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name\n\n\tObject.defineProperty( Function.prototype, 'name', {\n\n\t\tget: function () {\n\n\t\t\treturn this.toString().match( /^\\s*function\\s*([^\\(\\s]*)/ )[ 1 ];\n\n\t\t}\n\n\t} );\n\n}\n\nif ( Object.assign === undefined ) {\n\n\t// Missing in IE\n\t// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign\n\n\tObject.assign = function ( target ) {\n\n\t\tif ( target === undefined || target === null ) {\n\n\t\t\tthrow new TypeError( 'Cannot convert undefined or null to object' );\n\n\t\t}\n\n\t\tvar output = Object( target );\n\n\t\tfor ( var index = 1; index < arguments.length; index ++ ) {\n\n\t\t\tvar source = arguments[ index ];\n\n\t\t\tif ( source !== undefined && source !== null ) {\n\n\t\t\t\tfor ( var nextKey in source ) {\n\n\t\t\t\t\tif ( Object.prototype.hasOwnProperty.call( source, nextKey ) ) {\n\n\t\t\t\t\t\toutput[ nextKey ] = source[ nextKey ];\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn output;\n\n\t};\n\n}\n\nvar REVISION = '114';\nvar MOUSE = { LEFT: 0, MIDDLE: 1, RIGHT: 2, ROTATE: 0, DOLLY: 1, PAN: 2 };\nvar TOUCH = { ROTATE: 0, PAN: 1, DOLLY_PAN: 2, DOLLY_ROTATE: 3 };\nvar CullFaceNone = 0;\nvar CullFaceBack = 1;\nvar CullFaceFront = 2;\nvar PCFShadowMap = 1;\nvar PCFSoftShadowMap = 2;\nvar VSMShadowMap = 3;\nvar FrontSide = 0;\nvar BackSide = 1;\nvar DoubleSide = 2;\nvar FlatShading = 1;\nvar NoBlending = 0;\nvar NormalBlending = 1;\nvar AdditiveBlending = 2;\nvar SubtractiveBlending = 3;\nvar MultiplyBlending = 4;\nvar CustomBlending = 5;\nvar AddEquation = 100;\nvar SubtractEquation = 101;\nvar ReverseSubtractEquation = 102;\nvar MinEquation = 103;\nvar MaxEquation = 104;\nvar ZeroFactor = 200;\nvar OneFactor = 201;\nvar SrcColorFactor = 202;\nvar OneMinusSrcColorFactor = 203;\nvar SrcAlphaFactor = 204;\nvar OneMinusSrcAlphaFactor = 205;\nvar DstAlphaFactor = 206;\nvar OneMinusDstAlphaFactor = 207;\nvar DstColorFactor = 208;\nvar OneMinusDstColorFactor = 209;\nvar SrcAlphaSaturateFactor = 210;\nvar NeverDepth = 0;\nvar AlwaysDepth = 1;\nvar LessDepth = 2;\nvar LessEqualDepth = 3;\nvar EqualDepth = 4;\nvar GreaterEqualDepth = 5;\nvar GreaterDepth = 6;\nvar NotEqualDepth = 7;\nvar MultiplyOperation = 0;\nvar MixOperation = 1;\nvar AddOperation = 2;\nvar NoToneMapping = 0;\nvar LinearToneMapping = 1;\nvar ReinhardToneMapping = 2;\nvar Uncharted2ToneMapping = 3;\nvar CineonToneMapping = 4;\nvar ACESFilmicToneMapping = 5;\n\nvar UVMapping = 300;\nvar CubeReflectionMapping = 301;\nvar CubeRefractionMapping = 302;\nvar EquirectangularReflectionMapping = 303;\nvar EquirectangularRefractionMapping = 304;\nvar SphericalReflectionMapping = 305;\nvar CubeUVReflectionMapping = 306;\nvar CubeUVRefractionMapping = 307;\nvar RepeatWrapping = 1000;\nvar ClampToEdgeWrapping = 1001;\nvar MirroredRepeatWrapping = 1002;\nvar NearestFilter = 1003;\nvar NearestMipmapNearestFilter = 1004;\nvar NearestMipmapLinearFilter = 1005;\nvar LinearFilter = 1006;\nvar LinearMipmapNearestFilter = 1007;\nvar LinearMipmapLinearFilter = 1008;\nvar UnsignedByteType = 1009;\nvar ByteType = 1010;\nvar ShortType = 1011;\nvar UnsignedShortType = 1012;\nvar IntType = 1013;\nvar UnsignedIntType = 1014;\nvar FloatType = 1015;\nvar HalfFloatType = 1016;\nvar UnsignedShort4444Type = 1017;\nvar UnsignedShort5551Type = 1018;\nvar UnsignedShort565Type = 1019;\nvar UnsignedInt248Type = 1020;\nvar AlphaFormat = 1021;\nvar RGBFormat = 1022;\nvar RGBAFormat = 1023;\nvar LuminanceFormat = 1024;\nvar LuminanceAlphaFormat = 1025;\nvar DepthFormat = 1026;\nvar DepthStencilFormat = 1027;\nvar RedFormat = 1028;\nvar RedIntegerFormat = 1029;\nvar RGFormat = 1030;\nvar RGIntegerFormat = 1031;\nvar RGBIntegerFormat = 1032;\nvar RGBAIntegerFormat = 1033;\n\nvar RGB_S3TC_DXT1_Format = 33776;\nvar RGBA_S3TC_DXT1_Format = 33777;\nvar RGBA_S3TC_DXT3_Format = 33778;\nvar RGBA_S3TC_DXT5_Format = 33779;\nvar RGB_PVRTC_4BPPV1_Format = 35840;\nvar RGB_PVRTC_2BPPV1_Format = 35841;\nvar RGBA_PVRTC_4BPPV1_Format = 35842;\nvar RGBA_PVRTC_2BPPV1_Format = 35843;\nvar RGB_ETC1_Format = 36196;\nvar RGB_ETC2_Format = 37492;\nvar RGBA_ETC2_EAC_Format = 37496;\nvar RGBA_ASTC_4x4_Format = 37808;\nvar RGBA_ASTC_5x4_Format = 37809;\nvar RGBA_ASTC_5x5_Format = 37810;\nvar RGBA_ASTC_6x5_Format = 37811;\nvar RGBA_ASTC_6x6_Format = 37812;\nvar RGBA_ASTC_8x5_Format = 37813;\nvar RGBA_ASTC_8x6_Format = 37814;\nvar RGBA_ASTC_8x8_Format = 37815;\nvar RGBA_ASTC_10x5_Format = 37816;\nvar RGBA_ASTC_10x6_Format = 37817;\nvar RGBA_ASTC_10x8_Format = 37818;\nvar RGBA_ASTC_10x10_Format = 37819;\nvar RGBA_ASTC_12x10_Format = 37820;\nvar RGBA_ASTC_12x12_Format = 37821;\nvar SRGB8_ALPHA8_ASTC_4x4_Format = 37840;\nvar SRGB8_ALPHA8_ASTC_5x4_Format = 37841;\nvar SRGB8_ALPHA8_ASTC_5x5_Format = 37842;\nvar SRGB8_ALPHA8_ASTC_6x5_Format = 37843;\nvar SRGB8_ALPHA8_ASTC_6x6_Format = 37844;\nvar SRGB8_ALPHA8_ASTC_8x5_Format = 37845;\nvar SRGB8_ALPHA8_ASTC_8x6_Format = 37846;\nvar SRGB8_ALPHA8_ASTC_8x8_Format = 37847;\nvar SRGB8_ALPHA8_ASTC_10x5_Format = 37848;\nvar SRGB8_ALPHA8_ASTC_10x6_Format = 37849;\nvar SRGB8_ALPHA8_ASTC_10x8_Format = 37850;\nvar SRGB8_ALPHA8_ASTC_10x10_Format = 37851;\nvar SRGB8_ALPHA8_ASTC_12x10_Format = 37852;\nvar SRGB8_ALPHA8_ASTC_12x12_Format = 37853;\nvar LoopOnce = 2200;\nvar LoopRepeat = 2201;\nvar LoopPingPong = 2202;\nvar InterpolateDiscrete = 2300;\nvar InterpolateLinear = 2301;\nvar InterpolateSmooth = 2302;\nvar ZeroCurvatureEnding = 2400;\nvar ZeroSlopeEnding = 2401;\nvar WrapAroundEnding = 2402;\nvar TrianglesDrawMode = 0;\nvar LinearEncoding = 3000;\nvar sRGBEncoding = 3001;\nvar GammaEncoding = 3007;\nvar RGBEEncoding = 3002;\nvar LogLuvEncoding = 3003;\nvar RGBM7Encoding = 3004;\nvar RGBM16Encoding = 3005;\nvar RGBDEncoding = 3006;\nvar BasicDepthPacking = 3200;\nvar RGBADepthPacking = 3201;\nvar TangentSpaceNormalMap = 0;\nvar ObjectSpaceNormalMap = 1;\nvar KeepStencilOp = 7680;\nvar AlwaysStencilFunc = 519;\n\nvar StaticDrawUsage = 35044;\nvar DynamicDrawUsage = 35048;\n\n/**\n * https://github.com/mrdoob/eventdispatcher.js/\n */\n\nfunction EventDispatcher() {}\n\nObject.assign( EventDispatcher.prototype, {\n\n\taddEventListener: function ( type, listener ) {\n\n\t\tif ( this._listeners === undefined ) this._listeners = {};\n\n\t\tvar listeners = this._listeners;\n\n\t\tif ( listeners[ type ] === undefined ) {\n\n\t\t\tlisteners[ type ] = [];\n\n\t\t}\n\n\t\tif ( listeners[ type ].indexOf( listener ) === - 1 ) {\n\n\t\t\tlisteners[ type ].push( listener );\n\n\t\t}\n\n\t},\n\n\thasEventListener: function ( type, listener ) {\n\n\t\tif ( this._listeners === undefined ) return false;\n\n\t\tvar listeners = this._listeners;\n\n\t\treturn listeners[ type ] !== undefined && listeners[ type ].indexOf( listener ) !== - 1;\n\n\t},\n\n\tremoveEventListener: function ( type, listener ) {\n\n\t\tif ( this._listeners === undefined ) return;\n\n\t\tvar listeners = this._listeners;\n\t\tvar listenerArray = listeners[ type ];\n\n\t\tif ( listenerArray !== undefined ) {\n\n\t\t\tvar index = listenerArray.indexOf( listener );\n\n\t\t\tif ( index !== - 1 ) {\n\n\t\t\t\tlistenerArray.splice( index, 1 );\n\n\t\t\t}\n\n\t\t}\n\n\t},\n\n\tdispatchEvent: function ( event ) {\n\n\t\tif ( this._listeners === undefined ) return;\n\n\t\tvar listeners = this._listeners;\n\t\tvar listenerArray = listeners[ event.type ];\n\n\t\tif ( listenerArray !== undefined ) {\n\n\t\t\tevent.target = this;\n\n\t\t\tvar array = listenerArray.slice( 0 );\n\n\t\t\tfor ( var i = 0, l = array.length; i < l; i ++ ) {\n\n\t\t\t\tarray[ i ].call( this, event );\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n} );\n\n/**\n * @author alteredq / http://alteredqualia.com/\n * @author mrdoob / http://mrdoob.com/\n * @author WestLangley / http://github.com/WestLangley\n * @author thezwap\n */\n\nvar _lut = [];\n\nfor ( var i$3 = 0; i$3 < 256; i$3 ++ ) {\n\n\t_lut[ i$3 ] = ( i$3 < 16 ? '0' : '' ) + ( i$3 ).toString( 16 );\n\n}\n\nvar MathUtils = {\n\n\tDEG2RAD: Math.PI / 180,\n\tRAD2DEG: 180 / Math.PI,\n\n\tgenerateUUID: function () {\n\n\t\t// http://stackoverflow.com/questions/105034/how-to-create-a-guid-uuid-in-javascript/21963136#21963136\n\n\t\tvar d0 = Math.random() * 0xffffffff | 0;\n\t\tvar d1 = Math.random() * 0xffffffff | 0;\n\t\tvar d2 = Math.random() * 0xffffffff | 0;\n\t\tvar d3 = Math.random() * 0xffffffff | 0;\n\t\tvar uuid = _lut[ d0 & 0xff ] + _lut[ d0 >> 8 & 0xff ] + _lut[ d0 >> 16 & 0xff ] + _lut[ d0 >> 24 & 0xff ] + '-' +\n\t\t\t_lut[ d1 & 0xff ] + _lut[ d1 >> 8 & 0xff ] + '-' + _lut[ d1 >> 16 & 0x0f | 0x40 ] + _lut[ d1 >> 24 & 0xff ] + '-' +\n\t\t\t_lut[ d2 & 0x3f | 0x80 ] + _lut[ d2 >> 8 & 0xff ] + '-' + _lut[ d2 >> 16 & 0xff ] + _lut[ d2 >> 24 & 0xff ] +\n\t\t\t_lut[ d3 & 0xff ] + _lut[ d3 >> 8 & 0xff ] + _lut[ d3 >> 16 & 0xff ] + _lut[ d3 >> 24 & 0xff ];\n\n\t\t// .toUpperCase() here flattens concatenated strings to save heap memory space.\n\t\treturn uuid.toUpperCase();\n\n\t},\n\n\tclamp: function ( value, min, max ) {\n\n\t\treturn Math.max( min, Math.min( max, value ) );\n\n\t},\n\n\t// compute euclidian modulo of m % n\n\t// https://en.wikipedia.org/wiki/Modulo_operation\n\n\teuclideanModulo: function ( n, m ) {\n\n\t\treturn ( ( n % m ) + m ) % m;\n\n\t},\n\n\t// Linear mapping from range <a1, a2> to range <b1, b2>\n\n\tmapLinear: function ( x, a1, a2, b1, b2 ) {\n\n\t\treturn b1 + ( x - a1 ) * ( b2 - b1 ) / ( a2 - a1 );\n\n\t},\n\n\t// https://en.wikipedia.org/wiki/Linear_interpolation\n\n\tlerp: function ( x, y, t ) {\n\n\t\treturn ( 1 - t ) * x + t * y;\n\n\t},\n\n\t// http://en.wikipedia.org/wiki/Smoothstep\n\n\tsmoothstep: function ( x, min, max ) {\n\n\t\tif ( x <= min ) return 0;\n\t\tif ( x >= max ) return 1;\n\n\t\tx = ( x - min ) / ( max - min );\n\n\t\treturn x * x * ( 3 - 2 * x );\n\n\t},\n\n\tsmootherstep: function ( x, min, max ) {\n\n\t\tif ( x <= min ) return 0;\n\t\tif ( x >= max ) return 1;\n\n\t\tx = ( x - min ) / ( max - min );\n\n\t\treturn x * x * x * ( x * ( x * 6 - 15 ) + 10 );\n\n\t},\n\n\t// Random integer from <low, high> interval\n\n\trandInt: function ( low, high ) {\n\n\t\treturn low + Math.floor( Math.random() * ( high - low + 1 ) );\n\n\t},\n\n\t// Random float from <low, high> interval\n\n\trandFloat: function ( low, high ) {\n\n\t\treturn low + Math.random() * ( high - low );\n\n\t},\n\n\t// Random float from <-range/2, range/2> interval\n\n\trandFloatSpread: function ( range ) {\n\n\t\treturn range * ( 0.5 - Math.random() );\n\n\t},\n\n\tdegToRad: function ( degrees ) {\n\n\t\treturn degrees * MathUtils.DEG2RAD;\n\n\t},\n\n\tradToDeg: function ( radians ) {\n\n\t\treturn radians * MathUtils.RAD2DEG;\n\n\t},\n\n\tisPowerOfTwo: function ( value ) {\n\n\t\treturn ( value & ( value - 1 ) ) === 0 && value !== 0;\n\n\t},\n\n\tceilPowerOfTwo: function ( value ) {\n\n\t\treturn Math.pow( 2, Math.ceil( Math.log( value ) / Math.LN2 ) );\n\n\t},\n\n\tfloorPowerOfTwo: function ( value ) {\n\n\t\treturn Math.pow( 2, Math.floor( Math.log( value ) / Math.LN2 ) );\n\n\t},\n\n\tsetQuaternionFromProperEuler: function ( q, a, b, c, order ) {\n\n\t\t// Intrinsic Proper Euler Angles - see https://en.wikipedia.org/wiki/Euler_angles\n\n\t\t// rotations are applied to the axes in the order specified by 'order'\n\t\t// rotation by angle 'a' is applied first, then by angle 'b', then by angle 'c'\n\t\t// angles are in radians\n\n\t\tvar cos = Math.cos;\n\t\tvar sin = Math.sin;\n\n\t\tvar c2 = cos( b / 2 );\n\t\tvar s2 = sin( b / 2 );\n\n\t\tvar c13 = cos( ( a + c ) / 2 );\n\t\tvar s13 = sin( ( a + c ) / 2 );\n\n\t\tvar c1_3 = cos( ( a - c ) / 2 );\n\t\tvar s1_3 = sin( ( a - c ) / 2 );\n\n\t\tvar c3_1 = cos( ( c - a ) / 2 );\n\t\tvar s3_1 = sin( ( c - a ) / 2 );\n\n\t\tif ( order === 'XYX' ) {\n\n\t\t\tq.set( c2 * s13, s2 * c1_3, s2 * s1_3, c2 * c13 );\n\n\t\t} else if ( order === 'YZY' ) {\n\n\t\t\tq.set( s2 * s1_3, c2 * s13, s2 * c1_3, c2 * c13 );\n\n\t\t} else if ( order === 'ZXZ' ) {\n\n\t\t\tq.set( s2 * c1_3, s2 * s1_3, c2 * s13, c2 * c13 );\n\n\t\t} else if ( order === 'XZX' ) {\n\n\t\t\tq.set( c2 * s13, s2 * s3_1, s2 * c3_1, c2 * c13 );\n\n\t\t} else if ( order === 'YXY' ) {\n\n\t\t\tq.set( s2 * c3_1, c2 * s13, s2 * s3_1, c2 * c13 );\n\n\t\t} else if ( order === 'ZYZ' ) {\n\n\t\t\tq.set( s2 * s3_1, s2 * c3_1, c2 * s13, c2 * c13 );\n\n\t\t} else {\n\n\t\t\tconsole.warn( 'THREE.MathUtils: .setQuaternionFromProperEuler() encountered an unknown order.' );\n\n\t\t}\n\n\t}\n\n};\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author philogb / http://blog.thejit.org/\n * @author egraether / http://egraether.com/\n * @author zz85 / http://www.lab4games.net/zz85/blog\n */\n\nfunction Vector2( x, y ) {\n\n\tthis.x = x || 0;\n\tthis.y = y || 0;\n\n}\n\nObject.defineProperties( Vector2.prototype, {\n\n\t\"width\": {\n\n\t\tget: function () {\n\n\t\t\treturn this.x;\n\n\t\t},\n\n\t\tset: function ( value ) {\n\n\t\t\tthis.x = value;\n\n\t\t}\n\n\t},\n\n\t\"height\": {\n\n\t\tget: function () {\n\n\t\t\treturn this.y;\n\n\t\t},\n\n\t\tset: function ( value ) {\n\n\t\t\tthis.y = value;\n\n\t\t}\n\n\t}\n\n} );\n\nObject.assign( Vector2.prototype, {\n\n\tisVector2: true,\n\n\tset: function ( x, y ) {\n\n\t\tthis.x = x;\n\t\tthis.y = y;\n\n\t\treturn this;\n\n\t},\n\n\tsetScalar: function ( scalar ) {\n\n\t\tthis.x = scalar;\n\t\tthis.y = scalar;\n\n\t\treturn this;\n\n\t},\n\n\tsetX: function ( x ) {\n\n\t\tthis.x = x;\n\n\t\treturn this;\n\n\t},\n\n\tsetY: function ( y ) {\n\n\t\tthis.y = y;\n\n\t\treturn this;\n\n\t},\n\n\tsetComponent: function ( index, value ) {\n\n\t\tswitch ( index ) {\n\n\t\t\tcase 0: this.x = value; break;\n\t\t\tcase 1: this.y = value; break;\n\t\t\tdefault: throw new Error( 'index is out of range: ' + index );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tgetComponent: function ( index ) {\n\n\t\tswitch ( index ) {\n\n\t\t\tcase 0: return this.x;\n\t\t\tcase 1: return this.y;\n\t\t\tdefault: throw new Error( 'index is out of range: ' + index );\n\n\t\t}\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor( this.x, this.y );\n\n\t},\n\n\tcopy: function ( v ) {\n\n\t\tthis.x = v.x;\n\t\tthis.y = v.y;\n\n\t\treturn this;\n\n\t},\n\n\tadd: function ( v, w ) {\n\n\t\tif ( w !== undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Vector2: .add() now only accepts one argument. Use .addVectors( a, b ) instead.' );\n\t\t\treturn this.addVectors( v, w );\n\n\t\t}\n\n\t\tthis.x += v.x;\n\t\tthis.y += v.y;\n\n\t\treturn this;\n\n\t},\n\n\taddScalar: function ( s ) {\n\n\t\tthis.x += s;\n\t\tthis.y += s;\n\n\t\treturn this;\n\n\t},\n\n\taddVectors: function ( a, b ) {\n\n\t\tthis.x = a.x + b.x;\n\t\tthis.y = a.y + b.y;\n\n\t\treturn this;\n\n\t},\n\n\taddScaledVector: function ( v, s ) {\n\n\t\tthis.x += v.x * s;\n\t\tthis.y += v.y * s;\n\n\t\treturn this;\n\n\t},\n\n\tsub: function ( v, w ) {\n\n\t\tif ( w !== undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Vector2: .sub() now only accepts one argument. Use .subVectors( a, b ) instead.' );\n\t\t\treturn this.subVectors( v, w );\n\n\t\t}\n\n\t\tthis.x -= v.x;\n\t\tthis.y -= v.y;\n\n\t\treturn this;\n\n\t},\n\n\tsubScalar: function ( s ) {\n\n\t\tthis.x -= s;\n\t\tthis.y -= s;\n\n\t\treturn this;\n\n\t},\n\n\tsubVectors: function ( a, b ) {\n\n\t\tthis.x = a.x - b.x;\n\t\tthis.y = a.y - b.y;\n\n\t\treturn this;\n\n\t},\n\n\tmultiply: function ( v ) {\n\n\t\tthis.x *= v.x;\n\t\tthis.y *= v.y;\n\n\t\treturn this;\n\n\t},\n\n\tmultiplyScalar: function ( scalar ) {\n\n\t\tthis.x *= scalar;\n\t\tthis.y *= scalar;\n\n\t\treturn this;\n\n\t},\n\n\tdivide: function ( v ) {\n\n\t\tthis.x /= v.x;\n\t\tthis.y /= v.y;\n\n\t\treturn this;\n\n\t},\n\n\tdivideScalar: function ( scalar ) {\n\n\t\treturn this.multiplyScalar( 1 / scalar );\n\n\t},\n\n\tapplyMatrix3: function ( m ) {\n\n\t\tvar x = this.x, y = this.y;\n\t\tvar e = m.elements;\n\n\t\tthis.x = e[ 0 ] * x + e[ 3 ] * y + e[ 6 ];\n\t\tthis.y = e[ 1 ] * x + e[ 4 ] * y + e[ 7 ];\n\n\t\treturn this;\n\n\t},\n\n\tmin: function ( v ) {\n\n\t\tthis.x = Math.min( this.x, v.x );\n\t\tthis.y = Math.min( this.y, v.y );\n\n\t\treturn this;\n\n\t},\n\n\tmax: function ( v ) {\n\n\t\tthis.x = Math.max( this.x, v.x );\n\t\tthis.y = Math.max( this.y, v.y );\n\n\t\treturn this;\n\n\t},\n\n\tclamp: function ( min, max ) {\n\n\t\t// assumes min < max, componentwise\n\n\t\tthis.x = Math.max( min.x, Math.min( max.x, this.x ) );\n\t\tthis.y = Math.max( min.y, Math.min( max.y, this.y ) );\n\n\t\treturn this;\n\n\t},\n\n\tclampScalar: function ( minVal, maxVal ) {\n\n\t\tthis.x = Math.max( minVal, Math.min( maxVal, this.x ) );\n\t\tthis.y = Math.max( minVal, Math.min( maxVal, this.y ) );\n\n\t\treturn this;\n\n\t},\n\n\tclampLength: function ( min, max ) {\n\n\t\tvar length = this.length();\n\n\t\treturn this.divideScalar( length || 1 ).multiplyScalar( Math.max( min, Math.min( max, length ) ) );\n\n\t},\n\n\tfloor: function () {\n\n\t\tthis.x = Math.floor( this.x );\n\t\tthis.y = Math.floor( this.y );\n\n\t\treturn this;\n\n\t},\n\n\tceil: function () {\n\n\t\tthis.x = Math.ceil( this.x );\n\t\tthis.y = Math.ceil( this.y );\n\n\t\treturn this;\n\n\t},\n\n\tround: function () {\n\n\t\tthis.x = Math.round( this.x );\n\t\tthis.y = Math.round( this.y );\n\n\t\treturn this;\n\n\t},\n\n\troundToZero: function () {\n\n\t\tthis.x = ( this.x < 0 ) ? Math.ceil( this.x ) : Math.floor( this.x );\n\t\tthis.y = ( this.y < 0 ) ? Math.ceil( this.y ) : Math.floor( this.y );\n\n\t\treturn this;\n\n\t},\n\n\tnegate: function () {\n\n\t\tthis.x = - this.x;\n\t\tthis.y = - this.y;\n\n\t\treturn this;\n\n\t},\n\n\tdot: function ( v ) {\n\n\t\treturn this.x * v.x + this.y * v.y;\n\n\t},\n\n\tcross: function ( v ) {\n\n\t\treturn this.x * v.y - this.y * v.x;\n\n\t},\n\n\tlengthSq: function () {\n\n\t\treturn this.x * this.x + this.y * this.y;\n\n\t},\n\n\tlength: function () {\n\n\t\treturn Math.sqrt( this.x * this.x + this.y * this.y );\n\n\t},\n\n\tmanhattanLength: function () {\n\n\t\treturn Math.abs( this.x ) + Math.abs( this.y );\n\n\t},\n\n\tnormalize: function () {\n\n\t\treturn this.divideScalar( this.length() || 1 );\n\n\t},\n\n\tangle: function () {\n\n\t\t// computes the angle in radians with respect to the positive x-axis\n\n\t\tvar angle = Math.atan2( - this.y, - this.x ) + Math.PI;\n\n\t\treturn angle;\n\n\t},\n\n\tdistanceTo: function ( v ) {\n\n\t\treturn Math.sqrt( this.distanceToSquared( v ) );\n\n\t},\n\n\tdistanceToSquared: function ( v ) {\n\n\t\tvar dx = this.x - v.x, dy = this.y - v.y;\n\t\treturn dx * dx + dy * dy;\n\n\t},\n\n\tmanhattanDistanceTo: function ( v ) {\n\n\t\treturn Math.abs( this.x - v.x ) + Math.abs( this.y - v.y );\n\n\t},\n\n\tsetLength: function ( length ) {\n\n\t\treturn this.normalize().multiplyScalar( length );\n\n\t},\n\n\tlerp: function ( v, alpha ) {\n\n\t\tthis.x += ( v.x - this.x ) * alpha;\n\t\tthis.y += ( v.y - this.y ) * alpha;\n\n\t\treturn this;\n\n\t},\n\n\tlerpVectors: function ( v1, v2, alpha ) {\n\n\t\treturn this.subVectors( v2, v1 ).multiplyScalar( alpha ).add( v1 );\n\n\t},\n\n\tequals: function ( v ) {\n\n\t\treturn ( ( v.x === this.x ) && ( v.y === this.y ) );\n\n\t},\n\n\tfromArray: function ( array, offset ) {\n\n\t\tif ( offset === undefined ) offset = 0;\n\n\t\tthis.x = array[ offset ];\n\t\tthis.y = array[ offset + 1 ];\n\n\t\treturn this;\n\n\t},\n\n\ttoArray: function ( array, offset ) {\n\n\t\tif ( array === undefined ) array = [];\n\t\tif ( offset === undefined ) offset = 0;\n\n\t\tarray[ offset ] = this.x;\n\t\tarray[ offset + 1 ] = this.y;\n\n\t\treturn array;\n\n\t},\n\n\tfromBufferAttribute: function ( attribute, index, offset ) {\n\n\t\tif ( offset !== undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Vector2: offset has been removed from .fromBufferAttribute().' );\n\n\t\t}\n\n\t\tthis.x = attribute.getX( index );\n\t\tthis.y = attribute.getY( index );\n\n\t\treturn this;\n\n\t},\n\n\trotateAround: function ( center, angle ) {\n\n\t\tvar c = Math.cos( angle ), s = Math.sin( angle );\n\n\t\tvar x = this.x - center.x;\n\t\tvar y = this.y - center.y;\n\n\t\tthis.x = x * c - y * s + center.x;\n\t\tthis.y = x * s + y * c + center.y;\n\n\t\treturn this;\n\n\t}\n\n} );\n\n/**\n * @author alteredq / http://alteredqualia.com/\n * @author WestLangley / http://github.com/WestLangley\n * @author bhouston / http://clara.io\n * @author tschw\n */\n\nfunction Matrix3() {\n\n\tthis.elements = [\n\n\t\t1, 0, 0,\n\t\t0, 1, 0,\n\t\t0, 0, 1\n\n\t];\n\n\tif ( arguments.length > 0 ) {\n\n\t\tconsole.error( 'THREE.Matrix3: the constructor no longer reads arguments. use .set() instead.' );\n\n\t}\n\n}\n\nObject.assign( Matrix3.prototype, {\n\n\tisMatrix3: true,\n\n\tset: function ( n11, n12, n13, n21, n22, n23, n31, n32, n33 ) {\n\n\t\tvar te = this.elements;\n\n\t\tte[ 0 ] = n11; te[ 1 ] = n21; te[ 2 ] = n31;\n\t\tte[ 3 ] = n12; te[ 4 ] = n22; te[ 5 ] = n32;\n\t\tte[ 6 ] = n13; te[ 7 ] = n23; te[ 8 ] = n33;\n\n\t\treturn this;\n\n\t},\n\n\tidentity: function () {\n\n\t\tthis.set(\n\n\t\t\t1, 0, 0,\n\t\t\t0, 1, 0,\n\t\t\t0, 0, 1\n\n\t\t);\n\n\t\treturn this;\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor().fromArray( this.elements );\n\n\t},\n\n\tcopy: function ( m ) {\n\n\t\tvar te = this.elements;\n\t\tvar me = m.elements;\n\n\t\tte[ 0 ] = me[ 0 ]; te[ 1 ] = me[ 1 ]; te[ 2 ] = me[ 2 ];\n\t\tte[ 3 ] = me[ 3 ]; te[ 4 ] = me[ 4 ]; te[ 5 ] = me[ 5 ];\n\t\tte[ 6 ] = me[ 6 ]; te[ 7 ] = me[ 7 ]; te[ 8 ] = me[ 8 ];\n\n\t\treturn this;\n\n\t},\n\n\textractBasis: function ( xAxis, yAxis, zAxis ) {\n\n\t\txAxis.setFromMatrix3Column( this, 0 );\n\t\tyAxis.setFromMatrix3Column( this, 1 );\n\t\tzAxis.setFromMatrix3Column( this, 2 );\n\n\t\treturn this;\n\n\t},\n\n\tsetFromMatrix4: function ( m ) {\n\n\t\tvar me = m.elements;\n\n\t\tthis.set(\n\n\t\t\tme[ 0 ], me[ 4 ], me[ 8 ],\n\t\t\tme[ 1 ], me[ 5 ], me[ 9 ],\n\t\t\tme[ 2 ], me[ 6 ], me[ 10 ]\n\n\t\t);\n\n\t\treturn this;\n\n\t},\n\n\tmultiply: function ( m ) {\n\n\t\treturn this.multiplyMatrices( this, m );\n\n\t},\n\n\tpremultiply: function ( m ) {\n\n\t\treturn this.multiplyMatrices( m, this );\n\n\t},\n\n\tmultiplyMatrices: function ( a, b ) {\n\n\t\tvar ae = a.elements;\n\t\tvar be = b.elements;\n\t\tvar te = this.elements;\n\n\t\tvar a11 = ae[ 0 ], a12 = ae[ 3 ], a13 = ae[ 6 ];\n\t\tvar a21 = ae[ 1 ], a22 = ae[ 4 ], a23 = ae[ 7 ];\n\t\tvar a31 = ae[ 2 ], a32 = ae[ 5 ], a33 = ae[ 8 ];\n\n\t\tvar b11 = be[ 0 ], b12 = be[ 3 ], b13 = be[ 6 ];\n\t\tvar b21 = be[ 1 ], b22 = be[ 4 ], b23 = be[ 7 ];\n\t\tvar b31 = be[ 2 ], b32 = be[ 5 ], b33 = be[ 8 ];\n\n\t\tte[ 0 ] = a11 * b11 + a12 * b21 + a13 * b31;\n\t\tte[ 3 ] = a11 * b12 + a12 * b22 + a13 * b32;\n\t\tte[ 6 ] = a11 * b13 + a12 * b23 + a13 * b33;\n\n\t\tte[ 1 ] = a21 * b11 + a22 * b21 + a23 * b31;\n\t\tte[ 4 ] = a21 * b12 + a22 * b22 + a23 * b32;\n\t\tte[ 7 ] = a21 * b13 + a22 * b23 + a23 * b33;\n\n\t\tte[ 2 ] = a31 * b11 + a32 * b21 + a33 * b31;\n\t\tte[ 5 ] = a31 * b12 + a32 * b22 + a33 * b32;\n\t\tte[ 8 ] = a31 * b13 + a32 * b23 + a33 * b33;\n\n\t\treturn this;\n\n\t},\n\n\tmultiplyScalar: function ( s ) {\n\n\t\tvar te = this.elements;\n\n\t\tte[ 0 ] *= s; te[ 3 ] *= s; te[ 6 ] *= s;\n\t\tte[ 1 ] *= s; te[ 4 ] *= s; te[ 7 ] *= s;\n\t\tte[ 2 ] *= s; te[ 5 ] *= s; te[ 8 ] *= s;\n\n\t\treturn this;\n\n\t},\n\n\tdeterminant: function () {\n\n\t\tvar te = this.elements;\n\n\t\tvar a = te[ 0 ], b = te[ 1 ], c = te[ 2 ],\n\t\t\td = te[ 3 ], e = te[ 4 ], f = te[ 5 ],\n\t\t\tg = te[ 6 ], h = te[ 7 ], i = te[ 8 ];\n\n\t\treturn a * e * i - a * f * h - b * d * i + b * f * g + c * d * h - c * e * g;\n\n\t},\n\n\tgetInverse: function ( matrix, throwOnDegenerate ) {\n\n\t\tif ( matrix && matrix.isMatrix4 ) {\n\n\t\t\tconsole.error( \"THREE.Matrix3: .getInverse() no longer takes a Matrix4 argument.\" );\n\n\t\t}\n\n\t\tvar me = matrix.elements,\n\t\t\tte = this.elements,\n\n\t\t\tn11 = me[ 0 ], n21 = me[ 1 ], n31 = me[ 2 ],\n\t\t\tn12 = me[ 3 ], n22 = me[ 4 ], n32 = me[ 5 ],\n\t\t\tn13 = me[ 6 ], n23 = me[ 7 ], n33 = me[ 8 ],\n\n\t\t\tt11 = n33 * n22 - n32 * n23,\n\t\t\tt12 = n32 * n13 - n33 * n12,\n\t\t\tt13 = n23 * n12 - n22 * n13,\n\n\t\t\tdet = n11 * t11 + n21 * t12 + n31 * t13;\n\n\t\tif ( det === 0 ) {\n\n\t\t\tvar msg = \"THREE.Matrix3: .getInverse() can't invert matrix, determinant is 0\";\n\n\t\t\tif ( throwOnDegenerate === true ) {\n\n\t\t\t\tthrow new Error( msg );\n\n\t\t\t} else {\n\n\t\t\t\tconsole.warn( msg );\n\n\t\t\t}\n\n\t\t\treturn this.identity();\n\n\t\t}\n\n\t\tvar detInv = 1 / det;\n\n\t\tte[ 0 ] = t11 * detInv;\n\t\tte[ 1 ] = ( n31 * n23 - n33 * n21 ) * detInv;\n\t\tte[ 2 ] = ( n32 * n21 - n31 * n22 ) * detInv;\n\n\t\tte[ 3 ] = t12 * detInv;\n\t\tte[ 4 ] = ( n33 * n11 - n31 * n13 ) * detInv;\n\t\tte[ 5 ] = ( n31 * n12 - n32 * n11 ) * detInv;\n\n\t\tte[ 6 ] = t13 * detInv;\n\t\tte[ 7 ] = ( n21 * n13 - n23 * n11 ) * detInv;\n\t\tte[ 8 ] = ( n22 * n11 - n21 * n12 ) * detInv;\n\n\t\treturn this;\n\n\t},\n\n\ttranspose: function () {\n\n\t\tvar tmp, m = this.elements;\n\n\t\ttmp = m[ 1 ]; m[ 1 ] = m[ 3 ]; m[ 3 ] = tmp;\n\t\ttmp = m[ 2 ]; m[ 2 ] = m[ 6 ]; m[ 6 ] = tmp;\n\t\ttmp = m[ 5 ]; m[ 5 ] = m[ 7 ]; m[ 7 ] = tmp;\n\n\t\treturn this;\n\n\t},\n\n\tgetNormalMatrix: function ( matrix4 ) {\n\n\t\treturn this.setFromMatrix4( matrix4 ).getInverse( this ).transpose();\n\n\t},\n\n\ttransposeIntoArray: function ( r ) {\n\n\t\tvar m = this.elements;\n\n\t\tr[ 0 ] = m[ 0 ];\n\t\tr[ 1 ] = m[ 3 ];\n\t\tr[ 2 ] = m[ 6 ];\n\t\tr[ 3 ] = m[ 1 ];\n\t\tr[ 4 ] = m[ 4 ];\n\t\tr[ 5 ] = m[ 7 ];\n\t\tr[ 6 ] = m[ 2 ];\n\t\tr[ 7 ] = m[ 5 ];\n\t\tr[ 8 ] = m[ 8 ];\n\n\t\treturn this;\n\n\t},\n\n\tsetUvTransform: function ( tx, ty, sx, sy, rotation, cx, cy ) {\n\n\t\tvar c = Math.cos( rotation );\n\t\tvar s = Math.sin( rotation );\n\n\t\tthis.set(\n\t\t\tsx * c, sx * s, - sx * ( c * cx + s * cy ) + cx + tx,\n\t\t\t- sy * s, sy * c, - sy * ( - s * cx + c * cy ) + cy + ty,\n\t\t\t0, 0, 1\n\t\t);\n\n\t},\n\n\tscale: function ( sx, sy ) {\n\n\t\tvar te = this.elements;\n\n\t\tte[ 0 ] *= sx; te[ 3 ] *= sx; te[ 6 ] *= sx;\n\t\tte[ 1 ] *= sy; te[ 4 ] *= sy; te[ 7 ] *= sy;\n\n\t\treturn this;\n\n\t},\n\n\trotate: function ( theta ) {\n\n\t\tvar c = Math.cos( theta );\n\t\tvar s = Math.sin( theta );\n\n\t\tvar te = this.elements;\n\n\t\tvar a11 = te[ 0 ], a12 = te[ 3 ], a13 = te[ 6 ];\n\t\tvar a21 = te[ 1 ], a22 = te[ 4 ], a23 = te[ 7 ];\n\n\t\tte[ 0 ] = c * a11 + s * a21;\n\t\tte[ 3 ] = c * a12 + s * a22;\n\t\tte[ 6 ] = c * a13 + s * a23;\n\n\t\tte[ 1 ] = - s * a11 + c * a21;\n\t\tte[ 4 ] = - s * a12 + c * a22;\n\t\tte[ 7 ] = - s * a13 + c * a23;\n\n\t\treturn this;\n\n\t},\n\n\ttranslate: function ( tx, ty ) {\n\n\t\tvar te = this.elements;\n\n\t\tte[ 0 ] += tx * te[ 2 ]; te[ 3 ] += tx * te[ 5 ]; te[ 6 ] += tx * te[ 8 ];\n\t\tte[ 1 ] += ty * te[ 2 ]; te[ 4 ] += ty * te[ 5 ]; te[ 7 ] += ty * te[ 8 ];\n\n\t\treturn this;\n\n\t},\n\n\tequals: function ( matrix ) {\n\n\t\tvar te = this.elements;\n\t\tvar me = matrix.elements;\n\n\t\tfor ( var i = 0; i < 9; i ++ ) {\n\n\t\t\tif ( te[ i ] !== me[ i ] ) return false;\n\n\t\t}\n\n\t\treturn true;\n\n\t},\n\n\tfromArray: function ( array, offset ) {\n\n\t\tif ( offset === undefined ) offset = 0;\n\n\t\tfor ( var i = 0; i < 9; i ++ ) {\n\n\t\t\tthis.elements[ i ] = array[ i + offset ];\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\ttoArray: function ( array, offset ) {\n\n\t\tif ( array === undefined ) array = [];\n\t\tif ( offset === undefined ) offset = 0;\n\n\t\tvar te = this.elements;\n\n\t\tarray[ offset ] = te[ 0 ];\n\t\tarray[ offset + 1 ] = te[ 1 ];\n\t\tarray[ offset + 2 ] = te[ 2 ];\n\n\t\tarray[ offset + 3 ] = te[ 3 ];\n\t\tarray[ offset + 4 ] = te[ 4 ];\n\t\tarray[ offset + 5 ] = te[ 5 ];\n\n\t\tarray[ offset + 6 ] = te[ 6 ];\n\t\tarray[ offset + 7 ] = te[ 7 ];\n\t\tarray[ offset + 8 ] = te[ 8 ];\n\n\t\treturn array;\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n * @author szimek / https://github.com/szimek/\n */\n\nvar _canvas;\n\nvar ImageUtils = {\n\n\tgetDataURL: function ( image ) {\n\n\t\tvar canvas;\n\n\t\tif ( typeof HTMLCanvasElement == 'undefined' ) {\n\n\t\t\treturn image.src;\n\n\t\t} else if ( image instanceof HTMLCanvasElement ) {\n\n\t\t\tcanvas = image;\n\n\t\t} else {\n\n\t\t\tif ( _canvas === undefined ) _canvas = document.createElementNS( 'http://www.w3.org/1999/xhtml', 'canvas' );\n\n\t\t\t_canvas.width = image.width;\n\t\t\t_canvas.height = image.height;\n\n\t\t\tvar context = _canvas.getContext( '2d' );\n\n\t\t\tif ( image instanceof ImageData ) {\n\n\t\t\t\tcontext.putImageData( image, 0, 0 );\n\n\t\t\t} else {\n\n\t\t\t\tcontext.drawImage( image, 0, 0, image.width, image.height );\n\n\t\t\t}\n\n\t\t\tcanvas = _canvas;\n\n\t\t}\n\n\t\tif ( canvas.width > 2048 || canvas.height > 2048 ) {\n\n\t\t\treturn canvas.toDataURL( 'image/jpeg', 0.6 );\n\n\t\t} else {\n\n\t\t\treturn canvas.toDataURL( 'image/png' );\n\n\t\t}\n\n\t}\n\n};\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n * @author szimek / https://github.com/szimek/\n */\n\nvar textureId = 0;\n\nfunction Texture( image, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding ) {\n\n\tObject.defineProperty( this, 'id', { value: textureId ++ } );\n\n\tthis.uuid = MathUtils.generateUUID();\n\n\tthis.name = '';\n\n\tthis.image = image !== undefined ? image : Texture.DEFAULT_IMAGE;\n\tthis.mipmaps = [];\n\n\tthis.mapping = mapping !== undefined ? mapping : Texture.DEFAULT_MAPPING;\n\n\tthis.wrapS = wrapS !== undefined ? wrapS : ClampToEdgeWrapping;\n\tthis.wrapT = wrapT !== undefined ? wrapT : ClampToEdgeWrapping;\n\n\tthis.magFilter = magFilter !== undefined ? magFilter : LinearFilter;\n\tthis.minFilter = minFilter !== undefined ? minFilter : LinearMipmapLinearFilter;\n\n\tthis.anisotropy = anisotropy !== undefined ? anisotropy : 1;\n\n\tthis.format = format !== undefined ? format : RGBAFormat;\n\tthis.internalFormat = null;\n\tthis.type = type !== undefined ? type : UnsignedByteType;\n\n\tthis.offset = new Vector2( 0, 0 );\n\tthis.repeat = new Vector2( 1, 1 );\n\tthis.center = new Vector2( 0, 0 );\n\tthis.rotation = 0;\n\n\tthis.matrixAutoUpdate = true;\n\tthis.matrix = new Matrix3();\n\n\tthis.generateMipmaps = true;\n\tthis.premultiplyAlpha = false;\n\tthis.flipY = true;\n\tthis.unpackAlignment = 4;\t// valid values: 1, 2, 4, 8 (see http://www.khronos.org/opengles/sdk/docs/man/xhtml/glPixelStorei.xml)\n\n\t// Values of encoding !== THREE.LinearEncoding only supported on map, envMap and emissiveMap.\n\t//\n\t// Also changing the encoding after already used by a Material will not automatically make the Material\n\t// update. You need to explicitly call Material.needsUpdate to trigger it to recompile.\n\tthis.encoding = encoding !== undefined ? encoding : LinearEncoding;\n\n\tthis.version = 0;\n\tthis.onUpdate = null;\n\n}\n\nTexture.DEFAULT_IMAGE = undefined;\nTexture.DEFAULT_MAPPING = UVMapping;\n\nTexture.prototype = Object.assign( Object.create( EventDispatcher.prototype ), {\n\n\tconstructor: Texture,\n\n\tisTexture: true,\n\n\tupdateMatrix: function () {\n\n\t\tthis.matrix.setUvTransform( this.offset.x, this.offset.y, this.repeat.x, this.repeat.y, this.rotation, this.center.x, this.center.y );\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor().copy( this );\n\n\t},\n\n\tcopy: function ( source ) {\n\n\t\tthis.name = source.name;\n\n\t\tthis.image = source.image;\n\t\tthis.mipmaps = source.mipmaps.slice( 0 );\n\n\t\tthis.mapping = source.mapping;\n\n\t\tthis.wrapS = source.wrapS;\n\t\tthis.wrapT = source.wrapT;\n\n\t\tthis.magFilter = source.magFilter;\n\t\tthis.minFilter = source.minFilter;\n\n\t\tthis.anisotropy = source.anisotropy;\n\n\t\tthis.format = source.format;\n\t\tthis.internalFormat = source.internalFormat;\n\t\tthis.type = source.type;\n\n\t\tthis.offset.copy( source.offset );\n\t\tthis.repeat.copy( source.repeat );\n\t\tthis.center.copy( source.center );\n\t\tthis.rotation = source.rotation;\n\n\t\tthis.matrixAutoUpdate = source.matrixAutoUpdate;\n\t\tthis.matrix.copy( source.matrix );\n\n\t\tthis.generateMipmaps = source.generateMipmaps;\n\t\tthis.premultiplyAlpha = source.premultiplyAlpha;\n\t\tthis.flipY = source.flipY;\n\t\tthis.unpackAlignment = source.unpackAlignment;\n\t\tthis.encoding = source.encoding;\n\n\t\treturn this;\n\n\t},\n\n\ttoJSON: function ( meta ) {\n\n\t\tvar isRootObject = ( meta === undefined || typeof meta === 'string' );\n\n\t\tif ( ! isRootObject && meta.textures[ this.uuid ] !== undefined ) {\n\n\t\t\treturn meta.textures[ this.uuid ];\n\n\t\t}\n\n\t\tvar output = {\n\n\t\t\tmetadata: {\n\t\t\t\tversion: 4.5,\n\t\t\t\ttype: 'Texture',\n\t\t\t\tgenerator: 'Texture.toJSON'\n\t\t\t},\n\n\t\t\tuuid: this.uuid,\n\t\t\tname: this.name,\n\n\t\t\tmapping: this.mapping,\n\n\t\t\trepeat: [ this.repeat.x, this.repeat.y ],\n\t\t\toffset: [ this.offset.x, this.offset.y ],\n\t\t\tcenter: [ this.center.x, this.center.y ],\n\t\t\trotation: this.rotation,\n\n\t\t\twrap: [ this.wrapS, this.wrapT ],\n\n\t\t\tformat: this.format,\n\t\t\ttype: this.type,\n\t\t\tencoding: this.encoding,\n\n\t\t\tminFilter: this.minFilter,\n\t\t\tmagFilter: this.magFilter,\n\t\t\tanisotropy: this.anisotropy,\n\n\t\t\tflipY: this.flipY,\n\n\t\t\tpremultiplyAlpha: this.premultiplyAlpha,\n\t\t\tunpackAlignment: this.unpackAlignment\n\n\t\t};\n\n\t\tif ( this.image !== undefined ) {\n\n\t\t\t// TODO: Move to THREE.Image\n\n\t\t\tvar image = this.image;\n\n\t\t\tif ( image.uuid === undefined ) {\n\n\t\t\t\timage.uuid = MathUtils.generateUUID(); // UGH\n\n\t\t\t}\n\n\t\t\tif ( ! isRootObject && meta.images[ image.uuid ] === undefined ) {\n\n\t\t\t\tvar url;\n\n\t\t\t\tif ( Array.isArray( image ) ) {\n\n\t\t\t\t\t// process array of images e.g. CubeTexture\n\n\t\t\t\t\turl = [];\n\n\t\t\t\t\tfor ( var i = 0, l = image.length; i < l; i ++ ) {\n\n\t\t\t\t\t\turl.push( ImageUtils.getDataURL( image[ i ] ) );\n\n\t\t\t\t\t}\n\n\t\t\t\t} else {\n\n\t\t\t\t\t// process single image\n\n\t\t\t\t\turl = ImageUtils.getDataURL( image );\n\n\t\t\t\t}\n\n\t\t\t\tmeta.images[ image.uuid ] = {\n\t\t\t\t\tuuid: image.uuid,\n\t\t\t\t\turl: url\n\t\t\t\t};\n\n\t\t\t}\n\n\t\t\toutput.image = image.uuid;\n\n\t\t}\n\n\t\tif ( ! isRootObject ) {\n\n\t\t\tmeta.textures[ this.uuid ] = output;\n\n\t\t}\n\n\t\treturn output;\n\n\t},\n\n\tdispose: function () {\n\n\t\tthis.dispatchEvent( { type: 'dispose' } );\n\n\t},\n\n\ttransformUv: function ( uv ) {\n\n\t\tif ( this.mapping !== UVMapping ) return uv;\n\n\t\tuv.applyMatrix3( this.matrix );\n\n\t\tif ( uv.x < 0 || uv.x > 1 ) {\n\n\t\t\tswitch ( this.wrapS ) {\n\n\t\t\t\tcase RepeatWrapping:\n\n\t\t\t\t\tuv.x = uv.x - Math.floor( uv.x );\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase ClampToEdgeWrapping:\n\n\t\t\t\t\tuv.x = uv.x < 0 ? 0 : 1;\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase MirroredRepeatWrapping:\n\n\t\t\t\t\tif ( Math.abs( Math.floor( uv.x ) % 2 ) === 1 ) {\n\n\t\t\t\t\t\tuv.x = Math.ceil( uv.x ) - uv.x;\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\tuv.x = uv.x - Math.floor( uv.x );\n\n\t\t\t\t\t}\n\t\t\t\t\tbreak;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( uv.y < 0 || uv.y > 1 ) {\n\n\t\t\tswitch ( this.wrapT ) {\n\n\t\t\t\tcase RepeatWrapping:\n\n\t\t\t\t\tuv.y = uv.y - Math.floor( uv.y );\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase ClampToEdgeWrapping:\n\n\t\t\t\t\tuv.y = uv.y < 0 ? 0 : 1;\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase MirroredRepeatWrapping:\n\n\t\t\t\t\tif ( Math.abs( Math.floor( uv.y ) % 2 ) === 1 ) {\n\n\t\t\t\t\t\tuv.y = Math.ceil( uv.y ) - uv.y;\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\tuv.y = uv.y - Math.floor( uv.y );\n\n\t\t\t\t\t}\n\t\t\t\t\tbreak;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( this.flipY ) {\n\n\t\t\tuv.y = 1 - uv.y;\n\n\t\t}\n\n\t\treturn uv;\n\n\t}\n\n} );\n\nObject.defineProperty( Texture.prototype, \"needsUpdate\", {\n\n\tset: function ( value ) {\n\n\t\tif ( value === true ) this.version ++;\n\n\t}\n\n} );\n\n/**\n * @author supereggbert / http://www.paulbrunt.co.uk/\n * @author philogb / http://blog.thejit.org/\n * @author mikael emtinger / http://gomo.se/\n * @author egraether / http://egraether.com/\n * @author WestLangley / http://github.com/WestLangley\n */\n\nfunction Vector4( x, y, z, w ) {\n\n\tthis.x = x || 0;\n\tthis.y = y || 0;\n\tthis.z = z || 0;\n\tthis.w = ( w !== undefined ) ? w : 1;\n\n}\n\nObject.defineProperties( Vector4.prototype, {\n\n\t\"width\": {\n\n\t\tget: function () {\n\n\t\t\treturn this.z;\n\n\t\t},\n\n\t\tset: function ( value ) {\n\n\t\t\tthis.z = value;\n\n\t\t}\n\n\t},\n\n\t\"height\": {\n\n\t\tget: function () {\n\n\t\t\treturn this.w;\n\n\t\t},\n\n\t\tset: function ( value ) {\n\n\t\t\tthis.w = value;\n\n\t\t}\n\n\t}\n\n} );\n\nObject.assign( Vector4.prototype, {\n\n\tisVector4: true,\n\n\tset: function ( x, y, z, w ) {\n\n\t\tthis.x = x;\n\t\tthis.y = y;\n\t\tthis.z = z;\n\t\tthis.w = w;\n\n\t\treturn this;\n\n\t},\n\n\tsetScalar: function ( scalar ) {\n\n\t\tthis.x = scalar;\n\t\tthis.y = scalar;\n\t\tthis.z = scalar;\n\t\tthis.w = scalar;\n\n\t\treturn this;\n\n\t},\n\n\tsetX: function ( x ) {\n\n\t\tthis.x = x;\n\n\t\treturn this;\n\n\t},\n\n\tsetY: function ( y ) {\n\n\t\tthis.y = y;\n\n\t\treturn this;\n\n\t},\n\n\tsetZ: function ( z ) {\n\n\t\tthis.z = z;\n\n\t\treturn this;\n\n\t},\n\n\tsetW: function ( w ) {\n\n\t\tthis.w = w;\n\n\t\treturn this;\n\n\t},\n\n\tsetComponent: function ( index, value ) {\n\n\t\tswitch ( index ) {\n\n\t\t\tcase 0: this.x = value; break;\n\t\t\tcase 1: this.y = value; break;\n\t\t\tcase 2: this.z = value; break;\n\t\t\tcase 3: this.w = value; break;\n\t\t\tdefault: throw new Error( 'index is out of range: ' + index );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tgetComponent: function ( index ) {\n\n\t\tswitch ( index ) {\n\n\t\t\tcase 0: return this.x;\n\t\t\tcase 1: return this.y;\n\t\t\tcase 2: return this.z;\n\t\t\tcase 3: return this.w;\n\t\t\tdefault: throw new Error( 'index is out of range: ' + index );\n\n\t\t}\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor( this.x, this.y, this.z, this.w );\n\n\t},\n\n\tcopy: function ( v ) {\n\n\t\tthis.x = v.x;\n\t\tthis.y = v.y;\n\t\tthis.z = v.z;\n\t\tthis.w = ( v.w !== undefined ) ? v.w : 1;\n\n\t\treturn this;\n\n\t},\n\n\tadd: function ( v, w ) {\n\n\t\tif ( w !== undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Vector4: .add() now only accepts one argument. Use .addVectors( a, b ) instead.' );\n\t\t\treturn this.addVectors( v, w );\n\n\t\t}\n\n\t\tthis.x += v.x;\n\t\tthis.y += v.y;\n\t\tthis.z += v.z;\n\t\tthis.w += v.w;\n\n\t\treturn this;\n\n\t},\n\n\taddScalar: function ( s ) {\n\n\t\tthis.x += s;\n\t\tthis.y += s;\n\t\tthis.z += s;\n\t\tthis.w += s;\n\n\t\treturn this;\n\n\t},\n\n\taddVectors: function ( a, b ) {\n\n\t\tthis.x = a.x + b.x;\n\t\tthis.y = a.y + b.y;\n\t\tthis.z = a.z + b.z;\n\t\tthis.w = a.w + b.w;\n\n\t\treturn this;\n\n\t},\n\n\taddScaledVector: function ( v, s ) {\n\n\t\tthis.x += v.x * s;\n\t\tthis.y += v.y * s;\n\t\tthis.z += v.z * s;\n\t\tthis.w += v.w * s;\n\n\t\treturn this;\n\n\t},\n\n\tsub: function ( v, w ) {\n\n\t\tif ( w !== undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Vector4: .sub() now only accepts one argument. Use .subVectors( a, b ) instead.' );\n\t\t\treturn this.subVectors( v, w );\n\n\t\t}\n\n\t\tthis.x -= v.x;\n\t\tthis.y -= v.y;\n\t\tthis.z -= v.z;\n\t\tthis.w -= v.w;\n\n\t\treturn this;\n\n\t},\n\n\tsubScalar: function ( s ) {\n\n\t\tthis.x -= s;\n\t\tthis.y -= s;\n\t\tthis.z -= s;\n\t\tthis.w -= s;\n\n\t\treturn this;\n\n\t},\n\n\tsubVectors: function ( a, b ) {\n\n\t\tthis.x = a.x - b.x;\n\t\tthis.y = a.y - b.y;\n\t\tthis.z = a.z - b.z;\n\t\tthis.w = a.w - b.w;\n\n\t\treturn this;\n\n\t},\n\n\tmultiplyScalar: function ( scalar ) {\n\n\t\tthis.x *= scalar;\n\t\tthis.y *= scalar;\n\t\tthis.z *= scalar;\n\t\tthis.w *= scalar;\n\n\t\treturn this;\n\n\t},\n\n\tapplyMatrix4: function ( m ) {\n\n\t\tvar x = this.x, y = this.y, z = this.z, w = this.w;\n\t\tvar e = m.elements;\n\n\t\tthis.x = e[ 0 ] * x + e[ 4 ] * y + e[ 8 ] * z + e[ 12 ] * w;\n\t\tthis.y = e[ 1 ] * x + e[ 5 ] * y + e[ 9 ] * z + e[ 13 ] * w;\n\t\tthis.z = e[ 2 ] * x + e[ 6 ] * y + e[ 10 ] * z + e[ 14 ] * w;\n\t\tthis.w = e[ 3 ] * x + e[ 7 ] * y + e[ 11 ] * z + e[ 15 ] * w;\n\n\t\treturn this;\n\n\t},\n\n\tdivideScalar: function ( scalar ) {\n\n\t\treturn this.multiplyScalar( 1 / scalar );\n\n\t},\n\n\tsetAxisAngleFromQuaternion: function ( q ) {\n\n\t\t// http://www.euclideanspace.com/maths/geometry/rotations/conversions/quaternionToAngle/index.htm\n\n\t\t// q is assumed to be normalized\n\n\t\tthis.w = 2 * Math.acos( q.w );\n\n\t\tvar s = Math.sqrt( 1 - q.w * q.w );\n\n\t\tif ( s < 0.0001 ) {\n\n\t\t\tthis.x = 1;\n\t\t\tthis.y = 0;\n\t\t\tthis.z = 0;\n\n\t\t} else {\n\n\t\t\tthis.x = q.x / s;\n\t\t\tthis.y = q.y / s;\n\t\t\tthis.z = q.z / s;\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tsetAxisAngleFromRotationMatrix: function ( m ) {\n\n\t\t// http://www.euclideanspace.com/maths/geometry/rotations/conversions/matrixToAngle/index.htm\n\n\t\t// assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)\n\n\t\tvar angle, x, y, z,\t\t// variables for result\n\t\t\tepsilon = 0.01,\t\t// margin to allow for rounding errors\n\t\t\tepsilon2 = 0.1,\t\t// margin to distinguish between 0 and 180 degrees\n\n\t\t\tte = m.elements,\n\n\t\t\tm11 = te[ 0 ], m12 = te[ 4 ], m13 = te[ 8 ],\n\t\t\tm21 = te[ 1 ], m22 = te[ 5 ], m23 = te[ 9 ],\n\t\t\tm31 = te[ 2 ], m32 = te[ 6 ], m33 = te[ 10 ];\n\n\t\tif ( ( Math.abs( m12 - m21 ) < epsilon ) &&\n\t\t     ( Math.abs( m13 - m31 ) < epsilon ) &&\n\t\t     ( Math.abs( m23 - m32 ) < epsilon ) ) {\n\n\t\t\t// singularity found\n\t\t\t// first check for identity matrix which must have +1 for all terms\n\t\t\t// in leading diagonal and zero in other terms\n\n\t\t\tif ( ( Math.abs( m12 + m21 ) < epsilon2 ) &&\n\t\t\t     ( Math.abs( m13 + m31 ) < epsilon2 ) &&\n\t\t\t     ( Math.abs( m23 + m32 ) < epsilon2 ) &&\n\t\t\t     ( Math.abs( m11 + m22 + m33 - 3 ) < epsilon2 ) ) {\n\n\t\t\t\t// this singularity is identity matrix so angle = 0\n\n\t\t\t\tthis.set( 1, 0, 0, 0 );\n\n\t\t\t\treturn this; // zero angle, arbitrary axis\n\n\t\t\t}\n\n\t\t\t// otherwise this singularity is angle = 180\n\n\t\t\tangle = Math.PI;\n\n\t\t\tvar xx = ( m11 + 1 ) / 2;\n\t\t\tvar yy = ( m22 + 1 ) / 2;\n\t\t\tvar zz = ( m33 + 1 ) / 2;\n\t\t\tvar xy = ( m12 + m21 ) / 4;\n\t\t\tvar xz = ( m13 + m31 ) / 4;\n\t\t\tvar yz = ( m23 + m32 ) / 4;\n\n\t\t\tif ( ( xx > yy ) && ( xx > zz ) ) {\n\n\t\t\t\t// m11 is the largest diagonal term\n\n\t\t\t\tif ( xx < epsilon ) {\n\n\t\t\t\t\tx = 0;\n\t\t\t\t\ty = 0.707106781;\n\t\t\t\t\tz = 0.707106781;\n\n\t\t\t\t} else {\n\n\t\t\t\t\tx = Math.sqrt( xx );\n\t\t\t\t\ty = xy / x;\n\t\t\t\t\tz = xz / x;\n\n\t\t\t\t}\n\n\t\t\t} else if ( yy > zz ) {\n\n\t\t\t\t// m22 is the largest diagonal term\n\n\t\t\t\tif ( yy < epsilon ) {\n\n\t\t\t\t\tx = 0.707106781;\n\t\t\t\t\ty = 0;\n\t\t\t\t\tz = 0.707106781;\n\n\t\t\t\t} else {\n\n\t\t\t\t\ty = Math.sqrt( yy );\n\t\t\t\t\tx = xy / y;\n\t\t\t\t\tz = yz / y;\n\n\t\t\t\t}\n\n\t\t\t} else {\n\n\t\t\t\t// m33 is the largest diagonal term so base result on this\n\n\t\t\t\tif ( zz < epsilon ) {\n\n\t\t\t\t\tx = 0.707106781;\n\t\t\t\t\ty = 0.707106781;\n\t\t\t\t\tz = 0;\n\n\t\t\t\t} else {\n\n\t\t\t\t\tz = Math.sqrt( zz );\n\t\t\t\t\tx = xz / z;\n\t\t\t\t\ty = yz / z;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tthis.set( x, y, z, angle );\n\n\t\t\treturn this; // return 180 deg rotation\n\n\t\t}\n\n\t\t// as we have reached here there are no singularities so we can handle normally\n\n\t\tvar s = Math.sqrt( ( m32 - m23 ) * ( m32 - m23 ) +\n\t\t                   ( m13 - m31 ) * ( m13 - m31 ) +\n\t\t                   ( m21 - m12 ) * ( m21 - m12 ) ); // used to normalize\n\n\t\tif ( Math.abs( s ) < 0.001 ) s = 1;\n\n\t\t// prevent divide by zero, should not happen if matrix is orthogonal and should be\n\t\t// caught by singularity test above, but I've left it in just in case\n\n\t\tthis.x = ( m32 - m23 ) / s;\n\t\tthis.y = ( m13 - m31 ) / s;\n\t\tthis.z = ( m21 - m12 ) / s;\n\t\tthis.w = Math.acos( ( m11 + m22 + m33 - 1 ) / 2 );\n\n\t\treturn this;\n\n\t},\n\n\tmin: function ( v ) {\n\n\t\tthis.x = Math.min( this.x, v.x );\n\t\tthis.y = Math.min( this.y, v.y );\n\t\tthis.z = Math.min( this.z, v.z );\n\t\tthis.w = Math.min( this.w, v.w );\n\n\t\treturn this;\n\n\t},\n\n\tmax: function ( v ) {\n\n\t\tthis.x = Math.max( this.x, v.x );\n\t\tthis.y = Math.max( this.y, v.y );\n\t\tthis.z = Math.max( this.z, v.z );\n\t\tthis.w = Math.max( this.w, v.w );\n\n\t\treturn this;\n\n\t},\n\n\tclamp: function ( min, max ) {\n\n\t\t// assumes min < max, componentwise\n\n\t\tthis.x = Math.max( min.x, Math.min( max.x, this.x ) );\n\t\tthis.y = Math.max( min.y, Math.min( max.y, this.y ) );\n\t\tthis.z = Math.max( min.z, Math.min( max.z, this.z ) );\n\t\tthis.w = Math.max( min.w, Math.min( max.w, this.w ) );\n\n\t\treturn this;\n\n\t},\n\n\tclampScalar: function ( minVal, maxVal ) {\n\n\t\tthis.x = Math.max( minVal, Math.min( maxVal, this.x ) );\n\t\tthis.y = Math.max( minVal, Math.min( maxVal, this.y ) );\n\t\tthis.z = Math.max( minVal, Math.min( maxVal, this.z ) );\n\t\tthis.w = Math.max( minVal, Math.min( maxVal, this.w ) );\n\n\t\treturn this;\n\n\t},\n\n\tclampLength: function ( min, max ) {\n\n\t\tvar length = this.length();\n\n\t\treturn this.divideScalar( length || 1 ).multiplyScalar( Math.max( min, Math.min( max, length ) ) );\n\n\t},\n\n\tfloor: function () {\n\n\t\tthis.x = Math.floor( this.x );\n\t\tthis.y = Math.floor( this.y );\n\t\tthis.z = Math.floor( this.z );\n\t\tthis.w = Math.floor( this.w );\n\n\t\treturn this;\n\n\t},\n\n\tceil: function () {\n\n\t\tthis.x = Math.ceil( this.x );\n\t\tthis.y = Math.ceil( this.y );\n\t\tthis.z = Math.ceil( this.z );\n\t\tthis.w = Math.ceil( this.w );\n\n\t\treturn this;\n\n\t},\n\n\tround: function () {\n\n\t\tthis.x = Math.round( this.x );\n\t\tthis.y = Math.round( this.y );\n\t\tthis.z = Math.round( this.z );\n\t\tthis.w = Math.round( this.w );\n\n\t\treturn this;\n\n\t},\n\n\troundToZero: function () {\n\n\t\tthis.x = ( this.x < 0 ) ? Math.ceil( this.x ) : Math.floor( this.x );\n\t\tthis.y = ( this.y < 0 ) ? Math.ceil( this.y ) : Math.floor( this.y );\n\t\tthis.z = ( this.z < 0 ) ? Math.ceil( this.z ) : Math.floor( this.z );\n\t\tthis.w = ( this.w < 0 ) ? Math.ceil( this.w ) : Math.floor( this.w );\n\n\t\treturn this;\n\n\t},\n\n\tnegate: function () {\n\n\t\tthis.x = - this.x;\n\t\tthis.y = - this.y;\n\t\tthis.z = - this.z;\n\t\tthis.w = - this.w;\n\n\t\treturn this;\n\n\t},\n\n\tdot: function ( v ) {\n\n\t\treturn this.x * v.x + this.y * v.y + this.z * v.z + this.w * v.w;\n\n\t},\n\n\tlengthSq: function () {\n\n\t\treturn this.x * this.x + this.y * this.y + this.z * this.z + this.w * this.w;\n\n\t},\n\n\tlength: function () {\n\n\t\treturn Math.sqrt( this.x * this.x + this.y * this.y + this.z * this.z + this.w * this.w );\n\n\t},\n\n\tmanhattanLength: function () {\n\n\t\treturn Math.abs( this.x ) + Math.abs( this.y ) + Math.abs( this.z ) + Math.abs( this.w );\n\n\t},\n\n\tnormalize: function () {\n\n\t\treturn this.divideScalar( this.length() || 1 );\n\n\t},\n\n\tsetLength: function ( length ) {\n\n\t\treturn this.normalize().multiplyScalar( length );\n\n\t},\n\n\tlerp: function ( v, alpha ) {\n\n\t\tthis.x += ( v.x - this.x ) * alpha;\n\t\tthis.y += ( v.y - this.y ) * alpha;\n\t\tthis.z += ( v.z - this.z ) * alpha;\n\t\tthis.w += ( v.w - this.w ) * alpha;\n\n\t\treturn this;\n\n\t},\n\n\tlerpVectors: function ( v1, v2, alpha ) {\n\n\t\treturn this.subVectors( v2, v1 ).multiplyScalar( alpha ).add( v1 );\n\n\t},\n\n\tequals: function ( v ) {\n\n\t\treturn ( ( v.x === this.x ) && ( v.y === this.y ) && ( v.z === this.z ) && ( v.w === this.w ) );\n\n\t},\n\n\tfromArray: function ( array, offset ) {\n\n\t\tif ( offset === undefined ) offset = 0;\n\n\t\tthis.x = array[ offset ];\n\t\tthis.y = array[ offset + 1 ];\n\t\tthis.z = array[ offset + 2 ];\n\t\tthis.w = array[ offset + 3 ];\n\n\t\treturn this;\n\n\t},\n\n\ttoArray: function ( array, offset ) {\n\n\t\tif ( array === undefined ) array = [];\n\t\tif ( offset === undefined ) offset = 0;\n\n\t\tarray[ offset ] = this.x;\n\t\tarray[ offset + 1 ] = this.y;\n\t\tarray[ offset + 2 ] = this.z;\n\t\tarray[ offset + 3 ] = this.w;\n\n\t\treturn array;\n\n\t},\n\n\tfromBufferAttribute: function ( attribute, index, offset ) {\n\n\t\tif ( offset !== undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Vector4: offset has been removed from .fromBufferAttribute().' );\n\n\t\t}\n\n\t\tthis.x = attribute.getX( index );\n\t\tthis.y = attribute.getY( index );\n\t\tthis.z = attribute.getZ( index );\n\t\tthis.w = attribute.getW( index );\n\n\t\treturn this;\n\n\t}\n\n} );\n\n/**\n * @author szimek / https://github.com/szimek/\n * @author alteredq / http://alteredqualia.com/\n * @author Marius Kintel / https://github.com/kintel\n */\n\n/*\n In options, we can specify:\n * Texture parameters for an auto-generated target texture\n * depthBuffer/stencilBuffer: Booleans to indicate if we should generate these buffers\n*/\nfunction WebGLRenderTarget( width, height, options ) {\n\n\tthis.width = width;\n\tthis.height = height;\n\n\tthis.scissor = new Vector4( 0, 0, width, height );\n\tthis.scissorTest = false;\n\n\tthis.viewport = new Vector4( 0, 0, width, height );\n\n\toptions = options || {};\n\n\tthis.texture = new Texture( undefined, options.mapping, options.wrapS, options.wrapT, options.magFilter, options.minFilter, options.format, options.type, options.anisotropy, options.encoding );\n\n\tthis.texture.image = {};\n\tthis.texture.image.width = width;\n\tthis.texture.image.height = height;\n\n\tthis.texture.generateMipmaps = options.generateMipmaps !== undefined ? options.generateMipmaps : false;\n\tthis.texture.minFilter = options.minFilter !== undefined ? options.minFilter : LinearFilter;\n\n\tthis.depthBuffer = options.depthBuffer !== undefined ? options.depthBuffer : true;\n\tthis.stencilBuffer = options.stencilBuffer !== undefined ? options.stencilBuffer : true;\n\tthis.depthTexture = options.depthTexture !== undefined ? options.depthTexture : null;\n\n}\n\nWebGLRenderTarget.prototype = Object.assign( Object.create( EventDispatcher.prototype ), {\n\n\tconstructor: WebGLRenderTarget,\n\n\tisWebGLRenderTarget: true,\n\n\tsetSize: function ( width, height ) {\n\n\t\tif ( this.width !== width || this.height !== height ) {\n\n\t\t\tthis.width = width;\n\t\t\tthis.height = height;\n\n\t\t\tthis.texture.image.width = width;\n\t\t\tthis.texture.image.height = height;\n\n\t\t\tthis.dispose();\n\n\t\t}\n\n\t\tthis.viewport.set( 0, 0, width, height );\n\t\tthis.scissor.set( 0, 0, width, height );\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor().copy( this );\n\n\t},\n\n\tcopy: function ( source ) {\n\n\t\tthis.width = source.width;\n\t\tthis.height = source.height;\n\n\t\tthis.viewport.copy( source.viewport );\n\n\t\tthis.texture = source.texture.clone();\n\n\t\tthis.depthBuffer = source.depthBuffer;\n\t\tthis.stencilBuffer = source.stencilBuffer;\n\t\tthis.depthTexture = source.depthTexture;\n\n\t\treturn this;\n\n\t},\n\n\tdispose: function () {\n\n\t\tthis.dispatchEvent( { type: 'dispose' } );\n\n\t}\n\n} );\n\n/**\n * @author Mugen87 / https://github.com/Mugen87\n * @author Matt DesLauriers / @mattdesl\n */\n\nfunction WebGLMultisampleRenderTarget( width, height, options ) {\n\n\tWebGLRenderTarget.call( this, width, height, options );\n\n\tthis.samples = 4;\n\n}\n\nWebGLMultisampleRenderTarget.prototype = Object.assign( Object.create( WebGLRenderTarget.prototype ), {\n\n\tconstructor: WebGLMultisampleRenderTarget,\n\n\tisWebGLMultisampleRenderTarget: true,\n\n\tcopy: function ( source ) {\n\n\t\tWebGLRenderTarget.prototype.copy.call( this, source );\n\n\t\tthis.samples = source.samples;\n\n\t\treturn this;\n\n\t}\n\n} );\n\n/**\n * @author mikael emtinger / http://gomo.se/\n * @author alteredq / http://alteredqualia.com/\n * @author WestLangley / http://github.com/WestLangley\n * @author bhouston / http://clara.io\n */\n\nfunction Quaternion( x, y, z, w ) {\n\n\tthis._x = x || 0;\n\tthis._y = y || 0;\n\tthis._z = z || 0;\n\tthis._w = ( w !== undefined ) ? w : 1;\n\n}\n\nObject.assign( Quaternion, {\n\n\tslerp: function ( qa, qb, qm, t ) {\n\n\t\treturn qm.copy( qa ).slerp( qb, t );\n\n\t},\n\n\tslerpFlat: function ( dst, dstOffset, src0, srcOffset0, src1, srcOffset1, t ) {\n\n\t\t// fuzz-free, array-based Quaternion SLERP operation\n\n\t\tvar x0 = src0[ srcOffset0 + 0 ],\n\t\t\ty0 = src0[ srcOffset0 + 1 ],\n\t\t\tz0 = src0[ srcOffset0 + 2 ],\n\t\t\tw0 = src0[ srcOffset0 + 3 ],\n\n\t\t\tx1 = src1[ srcOffset1 + 0 ],\n\t\t\ty1 = src1[ srcOffset1 + 1 ],\n\t\t\tz1 = src1[ srcOffset1 + 2 ],\n\t\t\tw1 = src1[ srcOffset1 + 3 ];\n\n\t\tif ( w0 !== w1 || x0 !== x1 || y0 !== y1 || z0 !== z1 ) {\n\n\t\t\tvar s = 1 - t,\n\n\t\t\t\tcos = x0 * x1 + y0 * y1 + z0 * z1 + w0 * w1,\n\n\t\t\t\tdir = ( cos >= 0 ? 1 : - 1 ),\n\t\t\t\tsqrSin = 1 - cos * cos;\n\n\t\t\t// Skip the Slerp for tiny steps to avoid numeric problems:\n\t\t\tif ( sqrSin > Number.EPSILON ) {\n\n\t\t\t\tvar sin = Math.sqrt( sqrSin ),\n\t\t\t\t\tlen = Math.atan2( sin, cos * dir );\n\n\t\t\t\ts = Math.sin( s * len ) / sin;\n\t\t\t\tt = Math.sin( t * len ) / sin;\n\n\t\t\t}\n\n\t\t\tvar tDir = t * dir;\n\n\t\t\tx0 = x0 * s + x1 * tDir;\n\t\t\ty0 = y0 * s + y1 * tDir;\n\t\t\tz0 = z0 * s + z1 * tDir;\n\t\t\tw0 = w0 * s + w1 * tDir;\n\n\t\t\t// Normalize in case we just did a lerp:\n\t\t\tif ( s === 1 - t ) {\n\n\t\t\t\tvar f = 1 / Math.sqrt( x0 * x0 + y0 * y0 + z0 * z0 + w0 * w0 );\n\n\t\t\t\tx0 *= f;\n\t\t\t\ty0 *= f;\n\t\t\t\tz0 *= f;\n\t\t\t\tw0 *= f;\n\n\t\t\t}\n\n\t\t}\n\n\t\tdst[ dstOffset ] = x0;\n\t\tdst[ dstOffset + 1 ] = y0;\n\t\tdst[ dstOffset + 2 ] = z0;\n\t\tdst[ dstOffset + 3 ] = w0;\n\n\t}\n\n} );\n\nObject.defineProperties( Quaternion.prototype, {\n\n\tx: {\n\n\t\tget: function () {\n\n\t\t\treturn this._x;\n\n\t\t},\n\n\t\tset: function ( value ) {\n\n\t\t\tthis._x = value;\n\t\t\tthis._onChangeCallback();\n\n\t\t}\n\n\t},\n\n\ty: {\n\n\t\tget: function () {\n\n\t\t\treturn this._y;\n\n\t\t},\n\n\t\tset: function ( value ) {\n\n\t\t\tthis._y = value;\n\t\t\tthis._onChangeCallback();\n\n\t\t}\n\n\t},\n\n\tz: {\n\n\t\tget: function () {\n\n\t\t\treturn this._z;\n\n\t\t},\n\n\t\tset: function ( value ) {\n\n\t\t\tthis._z = value;\n\t\t\tthis._onChangeCallback();\n\n\t\t}\n\n\t},\n\n\tw: {\n\n\t\tget: function () {\n\n\t\t\treturn this._w;\n\n\t\t},\n\n\t\tset: function ( value ) {\n\n\t\t\tthis._w = value;\n\t\t\tthis._onChangeCallback();\n\n\t\t}\n\n\t}\n\n} );\n\nObject.assign( Quaternion.prototype, {\n\n\tisQuaternion: true,\n\n\tset: function ( x, y, z, w ) {\n\n\t\tthis._x = x;\n\t\tthis._y = y;\n\t\tthis._z = z;\n\t\tthis._w = w;\n\n\t\tthis._onChangeCallback();\n\n\t\treturn this;\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor( this._x, this._y, this._z, this._w );\n\n\t},\n\n\tcopy: function ( quaternion ) {\n\n\t\tthis._x = quaternion.x;\n\t\tthis._y = quaternion.y;\n\t\tthis._z = quaternion.z;\n\t\tthis._w = quaternion.w;\n\n\t\tthis._onChangeCallback();\n\n\t\treturn this;\n\n\t},\n\n\tsetFromEuler: function ( euler, update ) {\n\n\t\tif ( ! ( euler && euler.isEuler ) ) {\n\n\t\t\tthrow new Error( 'THREE.Quaternion: .setFromEuler() now expects an Euler rotation rather than a Vector3 and order.' );\n\n\t\t}\n\n\t\tvar x = euler._x, y = euler._y, z = euler._z, order = euler.order;\n\n\t\t// http://www.mathworks.com/matlabcentral/fileexchange/\n\t\t// \t20696-function-to-convert-between-dcm-euler-angles-quaternions-and-euler-vectors/\n\t\t//\tcontent/SpinCalc.m\n\n\t\tvar cos = Math.cos;\n\t\tvar sin = Math.sin;\n\n\t\tvar c1 = cos( x / 2 );\n\t\tvar c2 = cos( y / 2 );\n\t\tvar c3 = cos( z / 2 );\n\n\t\tvar s1 = sin( x / 2 );\n\t\tvar s2 = sin( y / 2 );\n\t\tvar s3 = sin( z / 2 );\n\n\t\tif ( order === 'XYZ' ) {\n\n\t\t\tthis._x = s1 * c2 * c3 + c1 * s2 * s3;\n\t\t\tthis._y = c1 * s2 * c3 - s1 * c2 * s3;\n\t\t\tthis._z = c1 * c2 * s3 + s1 * s2 * c3;\n\t\t\tthis._w = c1 * c2 * c3 - s1 * s2 * s3;\n\n\t\t} else if ( order === 'YXZ' ) {\n\n\t\t\tthis._x = s1 * c2 * c3 + c1 * s2 * s3;\n\t\t\tthis._y = c1 * s2 * c3 - s1 * c2 * s3;\n\t\t\tthis._z = c1 * c2 * s3 - s1 * s2 * c3;\n\t\t\tthis._w = c1 * c2 * c3 + s1 * s2 * s3;\n\n\t\t} else if ( order === 'ZXY' ) {\n\n\t\t\tthis._x = s1 * c2 * c3 - c1 * s2 * s3;\n\t\t\tthis._y = c1 * s2 * c3 + s1 * c2 * s3;\n\t\t\tthis._z = c1 * c2 * s3 + s1 * s2 * c3;\n\t\t\tthis._w = c1 * c2 * c3 - s1 * s2 * s3;\n\n\t\t} else if ( order === 'ZYX' ) {\n\n\t\t\tthis._x = s1 * c2 * c3 - c1 * s2 * s3;\n\t\t\tthis._y = c1 * s2 * c3 + s1 * c2 * s3;\n\t\t\tthis._z = c1 * c2 * s3 - s1 * s2 * c3;\n\t\t\tthis._w = c1 * c2 * c3 + s1 * s2 * s3;\n\n\t\t} else if ( order === 'YZX' ) {\n\n\t\t\tthis._x = s1 * c2 * c3 + c1 * s2 * s3;\n\t\t\tthis._y = c1 * s2 * c3 + s1 * c2 * s3;\n\t\t\tthis._z = c1 * c2 * s3 - s1 * s2 * c3;\n\t\t\tthis._w = c1 * c2 * c3 - s1 * s2 * s3;\n\n\t\t} else if ( order === 'XZY' ) {\n\n\t\t\tthis._x = s1 * c2 * c3 - c1 * s2 * s3;\n\t\t\tthis._y = c1 * s2 * c3 - s1 * c2 * s3;\n\t\t\tthis._z = c1 * c2 * s3 + s1 * s2 * c3;\n\t\t\tthis._w = c1 * c2 * c3 + s1 * s2 * s3;\n\n\t\t}\n\n\t\tif ( update !== false ) this._onChangeCallback();\n\n\t\treturn this;\n\n\t},\n\n\tsetFromAxisAngle: function ( axis, angle ) {\n\n\t\t// http://www.euclideanspace.com/maths/geometry/rotations/conversions/angleToQuaternion/index.htm\n\n\t\t// assumes axis is normalized\n\n\t\tvar halfAngle = angle / 2, s = Math.sin( halfAngle );\n\n\t\tthis._x = axis.x * s;\n\t\tthis._y = axis.y * s;\n\t\tthis._z = axis.z * s;\n\t\tthis._w = Math.cos( halfAngle );\n\n\t\tthis._onChangeCallback();\n\n\t\treturn this;\n\n\t},\n\n\tsetFromRotationMatrix: function ( m ) {\n\n\t\t// http://www.euclideanspace.com/maths/geometry/rotations/conversions/matrixToQuaternion/index.htm\n\n\t\t// assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)\n\n\t\tvar te = m.elements,\n\n\t\t\tm11 = te[ 0 ], m12 = te[ 4 ], m13 = te[ 8 ],\n\t\t\tm21 = te[ 1 ], m22 = te[ 5 ], m23 = te[ 9 ],\n\t\t\tm31 = te[ 2 ], m32 = te[ 6 ], m33 = te[ 10 ],\n\n\t\t\ttrace = m11 + m22 + m33,\n\t\t\ts;\n\n\t\tif ( trace > 0 ) {\n\n\t\t\ts = 0.5 / Math.sqrt( trace + 1.0 );\n\n\t\t\tthis._w = 0.25 / s;\n\t\t\tthis._x = ( m32 - m23 ) * s;\n\t\t\tthis._y = ( m13 - m31 ) * s;\n\t\t\tthis._z = ( m21 - m12 ) * s;\n\n\t\t} else if ( m11 > m22 && m11 > m33 ) {\n\n\t\t\ts = 2.0 * Math.sqrt( 1.0 + m11 - m22 - m33 );\n\n\t\t\tthis._w = ( m32 - m23 ) / s;\n\t\t\tthis._x = 0.25 * s;\n\t\t\tthis._y = ( m12 + m21 ) / s;\n\t\t\tthis._z = ( m13 + m31 ) / s;\n\n\t\t} else if ( m22 > m33 ) {\n\n\t\t\ts = 2.0 * Math.sqrt( 1.0 + m22 - m11 - m33 );\n\n\t\t\tthis._w = ( m13 - m31 ) / s;\n\t\t\tthis._x = ( m12 + m21 ) / s;\n\t\t\tthis._y = 0.25 * s;\n\t\t\tthis._z = ( m23 + m32 ) / s;\n\n\t\t} else {\n\n\t\t\ts = 2.0 * Math.sqrt( 1.0 + m33 - m11 - m22 );\n\n\t\t\tthis._w = ( m21 - m12 ) / s;\n\t\t\tthis._x = ( m13 + m31 ) / s;\n\t\t\tthis._y = ( m23 + m32 ) / s;\n\t\t\tthis._z = 0.25 * s;\n\n\t\t}\n\n\t\tthis._onChangeCallback();\n\n\t\treturn this;\n\n\t},\n\n\tsetFromUnitVectors: function ( vFrom, vTo ) {\n\n\t\t// assumes direction vectors vFrom and vTo are normalized\n\n\t\tvar EPS = 0.000001;\n\n\t\tvar r = vFrom.dot( vTo ) + 1;\n\n\t\tif ( r < EPS ) {\n\n\t\t\tr = 0;\n\n\t\t\tif ( Math.abs( vFrom.x ) > Math.abs( vFrom.z ) ) {\n\n\t\t\t\tthis._x = - vFrom.y;\n\t\t\t\tthis._y = vFrom.x;\n\t\t\t\tthis._z = 0;\n\t\t\t\tthis._w = r;\n\n\t\t\t} else {\n\n\t\t\t\tthis._x = 0;\n\t\t\t\tthis._y = - vFrom.z;\n\t\t\t\tthis._z = vFrom.y;\n\t\t\t\tthis._w = r;\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\t// crossVectors( vFrom, vTo ); // inlined to avoid cyclic dependency on Vector3\n\n\t\t\tthis._x = vFrom.y * vTo.z - vFrom.z * vTo.y;\n\t\t\tthis._y = vFrom.z * vTo.x - vFrom.x * vTo.z;\n\t\t\tthis._z = vFrom.x * vTo.y - vFrom.y * vTo.x;\n\t\t\tthis._w = r;\n\n\t\t}\n\n\t\treturn this.normalize();\n\n\t},\n\n\tangleTo: function ( q ) {\n\n\t\treturn 2 * Math.acos( Math.abs( MathUtils.clamp( this.dot( q ), - 1, 1 ) ) );\n\n\t},\n\n\trotateTowards: function ( q, step ) {\n\n\t\tvar angle = this.angleTo( q );\n\n\t\tif ( angle === 0 ) return this;\n\n\t\tvar t = Math.min( 1, step / angle );\n\n\t\tthis.slerp( q, t );\n\n\t\treturn this;\n\n\t},\n\n\tinverse: function () {\n\n\t\t// quaternion is assumed to have unit length\n\n\t\treturn this.conjugate();\n\n\t},\n\n\tconjugate: function () {\n\n\t\tthis._x *= - 1;\n\t\tthis._y *= - 1;\n\t\tthis._z *= - 1;\n\n\t\tthis._onChangeCallback();\n\n\t\treturn this;\n\n\t},\n\n\tdot: function ( v ) {\n\n\t\treturn this._x * v._x + this._y * v._y + this._z * v._z + this._w * v._w;\n\n\t},\n\n\tlengthSq: function () {\n\n\t\treturn this._x * this._x + this._y * this._y + this._z * this._z + this._w * this._w;\n\n\t},\n\n\tlength: function () {\n\n\t\treturn Math.sqrt( this._x * this._x + this._y * this._y + this._z * this._z + this._w * this._w );\n\n\t},\n\n\tnormalize: function () {\n\n\t\tvar l = this.length();\n\n\t\tif ( l === 0 ) {\n\n\t\t\tthis._x = 0;\n\t\t\tthis._y = 0;\n\t\t\tthis._z = 0;\n\t\t\tthis._w = 1;\n\n\t\t} else {\n\n\t\t\tl = 1 / l;\n\n\t\t\tthis._x = this._x * l;\n\t\t\tthis._y = this._y * l;\n\t\t\tthis._z = this._z * l;\n\t\t\tthis._w = this._w * l;\n\n\t\t}\n\n\t\tthis._onChangeCallback();\n\n\t\treturn this;\n\n\t},\n\n\tmultiply: function ( q, p ) {\n\n\t\tif ( p !== undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Quaternion: .multiply() now only accepts one argument. Use .multiplyQuaternions( a, b ) instead.' );\n\t\t\treturn this.multiplyQuaternions( q, p );\n\n\t\t}\n\n\t\treturn this.multiplyQuaternions( this, q );\n\n\t},\n\n\tpremultiply: function ( q ) {\n\n\t\treturn this.multiplyQuaternions( q, this );\n\n\t},\n\n\tmultiplyQuaternions: function ( a, b ) {\n\n\t\t// from http://www.euclideanspace.com/maths/algebra/realNormedAlgebra/quaternions/code/index.htm\n\n\t\tvar qax = a._x, qay = a._y, qaz = a._z, qaw = a._w;\n\t\tvar qbx = b._x, qby = b._y, qbz = b._z, qbw = b._w;\n\n\t\tthis._x = qax * qbw + qaw * qbx + qay * qbz - qaz * qby;\n\t\tthis._y = qay * qbw + qaw * qby + qaz * qbx - qax * qbz;\n\t\tthis._z = qaz * qbw + qaw * qbz + qax * qby - qay * qbx;\n\t\tthis._w = qaw * qbw - qax * qbx - qay * qby - qaz * qbz;\n\n\t\tthis._onChangeCallback();\n\n\t\treturn this;\n\n\t},\n\n\tslerp: function ( qb, t ) {\n\n\t\tif ( t === 0 ) return this;\n\t\tif ( t === 1 ) return this.copy( qb );\n\n\t\tvar x = this._x, y = this._y, z = this._z, w = this._w;\n\n\t\t// http://www.euclideanspace.com/maths/algebra/realNormedAlgebra/quaternions/slerp/\n\n\t\tvar cosHalfTheta = w * qb._w + x * qb._x + y * qb._y + z * qb._z;\n\n\t\tif ( cosHalfTheta < 0 ) {\n\n\t\t\tthis._w = - qb._w;\n\t\t\tthis._x = - qb._x;\n\t\t\tthis._y = - qb._y;\n\t\t\tthis._z = - qb._z;\n\n\t\t\tcosHalfTheta = - cosHalfTheta;\n\n\t\t} else {\n\n\t\t\tthis.copy( qb );\n\n\t\t}\n\n\t\tif ( cosHalfTheta >= 1.0 ) {\n\n\t\t\tthis._w = w;\n\t\t\tthis._x = x;\n\t\t\tthis._y = y;\n\t\t\tthis._z = z;\n\n\t\t\treturn this;\n\n\t\t}\n\n\t\tvar sqrSinHalfTheta = 1.0 - cosHalfTheta * cosHalfTheta;\n\n\t\tif ( sqrSinHalfTheta <= Number.EPSILON ) {\n\n\t\t\tvar s = 1 - t;\n\t\t\tthis._w = s * w + t * this._w;\n\t\t\tthis._x = s * x + t * this._x;\n\t\t\tthis._y = s * y + t * this._y;\n\t\t\tthis._z = s * z + t * this._z;\n\n\t\t\tthis.normalize();\n\t\t\tthis._onChangeCallback();\n\n\t\t\treturn this;\n\n\t\t}\n\n\t\tvar sinHalfTheta = Math.sqrt( sqrSinHalfTheta );\n\t\tvar halfTheta = Math.atan2( sinHalfTheta, cosHalfTheta );\n\t\tvar ratioA = Math.sin( ( 1 - t ) * halfTheta ) / sinHalfTheta,\n\t\t\tratioB = Math.sin( t * halfTheta ) / sinHalfTheta;\n\n\t\tthis._w = ( w * ratioA + this._w * ratioB );\n\t\tthis._x = ( x * ratioA + this._x * ratioB );\n\t\tthis._y = ( y * ratioA + this._y * ratioB );\n\t\tthis._z = ( z * ratioA + this._z * ratioB );\n\n\t\tthis._onChangeCallback();\n\n\t\treturn this;\n\n\t},\n\n\tequals: function ( quaternion ) {\n\n\t\treturn ( quaternion._x === this._x ) && ( quaternion._y === this._y ) && ( quaternion._z === this._z ) && ( quaternion._w === this._w );\n\n\t},\n\n\tfromArray: function ( array, offset ) {\n\n\t\tif ( offset === undefined ) offset = 0;\n\n\t\tthis._x = array[ offset ];\n\t\tthis._y = array[ offset + 1 ];\n\t\tthis._z = array[ offset + 2 ];\n\t\tthis._w = array[ offset + 3 ];\n\n\t\tthis._onChangeCallback();\n\n\t\treturn this;\n\n\t},\n\n\ttoArray: function ( array, offset ) {\n\n\t\tif ( array === undefined ) array = [];\n\t\tif ( offset === undefined ) offset = 0;\n\n\t\tarray[ offset ] = this._x;\n\t\tarray[ offset + 1 ] = this._y;\n\t\tarray[ offset + 2 ] = this._z;\n\t\tarray[ offset + 3 ] = this._w;\n\n\t\treturn array;\n\n\t},\n\n\t_onChange: function ( callback ) {\n\n\t\tthis._onChangeCallback = callback;\n\n\t\treturn this;\n\n\t},\n\n\t_onChangeCallback: function () {}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author kile / http://kile.stravaganza.org/\n * @author philogb / http://blog.thejit.org/\n * @author mikael emtinger / http://gomo.se/\n * @author egraether / http://egraether.com/\n * @author WestLangley / http://github.com/WestLangley\n */\n\nvar _vector = new Vector3();\nvar _quaternion = new Quaternion();\n\nfunction Vector3( x, y, z ) {\n\n\tthis.x = x || 0;\n\tthis.y = y || 0;\n\tthis.z = z || 0;\n\n}\n\nObject.assign( Vector3.prototype, {\n\n\tisVector3: true,\n\n\tset: function ( x, y, z ) {\n\n\t\tthis.x = x;\n\t\tthis.y = y;\n\t\tthis.z = z;\n\n\t\treturn this;\n\n\t},\n\n\tsetScalar: function ( scalar ) {\n\n\t\tthis.x = scalar;\n\t\tthis.y = scalar;\n\t\tthis.z = scalar;\n\n\t\treturn this;\n\n\t},\n\n\tsetX: function ( x ) {\n\n\t\tthis.x = x;\n\n\t\treturn this;\n\n\t},\n\n\tsetY: function ( y ) {\n\n\t\tthis.y = y;\n\n\t\treturn this;\n\n\t},\n\n\tsetZ: function ( z ) {\n\n\t\tthis.z = z;\n\n\t\treturn this;\n\n\t},\n\n\tsetComponent: function ( index, value ) {\n\n\t\tswitch ( index ) {\n\n\t\t\tcase 0: this.x = value; break;\n\t\t\tcase 1: this.y = value; break;\n\t\t\tcase 2: this.z = value; break;\n\t\t\tdefault: throw new Error( 'index is out of range: ' + index );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tgetComponent: function ( index ) {\n\n\t\tswitch ( index ) {\n\n\t\t\tcase 0: return this.x;\n\t\t\tcase 1: return this.y;\n\t\t\tcase 2: return this.z;\n\t\t\tdefault: throw new Error( 'index is out of range: ' + index );\n\n\t\t}\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor( this.x, this.y, this.z );\n\n\t},\n\n\tcopy: function ( v ) {\n\n\t\tthis.x = v.x;\n\t\tthis.y = v.y;\n\t\tthis.z = v.z;\n\n\t\treturn this;\n\n\t},\n\n\tadd: function ( v, w ) {\n\n\t\tif ( w !== undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Vector3: .add() now only accepts one argument. Use .addVectors( a, b ) instead.' );\n\t\t\treturn this.addVectors( v, w );\n\n\t\t}\n\n\t\tthis.x += v.x;\n\t\tthis.y += v.y;\n\t\tthis.z += v.z;\n\n\t\treturn this;\n\n\t},\n\n\taddScalar: function ( s ) {\n\n\t\tthis.x += s;\n\t\tthis.y += s;\n\t\tthis.z += s;\n\n\t\treturn this;\n\n\t},\n\n\taddVectors: function ( a, b ) {\n\n\t\tthis.x = a.x + b.x;\n\t\tthis.y = a.y + b.y;\n\t\tthis.z = a.z + b.z;\n\n\t\treturn this;\n\n\t},\n\n\taddScaledVector: function ( v, s ) {\n\n\t\tthis.x += v.x * s;\n\t\tthis.y += v.y * s;\n\t\tthis.z += v.z * s;\n\n\t\treturn this;\n\n\t},\n\n\tsub: function ( v, w ) {\n\n\t\tif ( w !== undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Vector3: .sub() now only accepts one argument. Use .subVectors( a, b ) instead.' );\n\t\t\treturn this.subVectors( v, w );\n\n\t\t}\n\n\t\tthis.x -= v.x;\n\t\tthis.y -= v.y;\n\t\tthis.z -= v.z;\n\n\t\treturn this;\n\n\t},\n\n\tsubScalar: function ( s ) {\n\n\t\tthis.x -= s;\n\t\tthis.y -= s;\n\t\tthis.z -= s;\n\n\t\treturn this;\n\n\t},\n\n\tsubVectors: function ( a, b ) {\n\n\t\tthis.x = a.x - b.x;\n\t\tthis.y = a.y - b.y;\n\t\tthis.z = a.z - b.z;\n\n\t\treturn this;\n\n\t},\n\n\tmultiply: function ( v, w ) {\n\n\t\tif ( w !== undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Vector3: .multiply() now only accepts one argument. Use .multiplyVectors( a, b ) instead.' );\n\t\t\treturn this.multiplyVectors( v, w );\n\n\t\t}\n\n\t\tthis.x *= v.x;\n\t\tthis.y *= v.y;\n\t\tthis.z *= v.z;\n\n\t\treturn this;\n\n\t},\n\n\tmultiplyScalar: function ( scalar ) {\n\n\t\tthis.x *= scalar;\n\t\tthis.y *= scalar;\n\t\tthis.z *= scalar;\n\n\t\treturn this;\n\n\t},\n\n\tmultiplyVectors: function ( a, b ) {\n\n\t\tthis.x = a.x * b.x;\n\t\tthis.y = a.y * b.y;\n\t\tthis.z = a.z * b.z;\n\n\t\treturn this;\n\n\t},\n\n\tapplyEuler: function ( euler ) {\n\n\t\tif ( ! ( euler && euler.isEuler ) ) {\n\n\t\t\tconsole.error( 'THREE.Vector3: .applyEuler() now expects an Euler rotation rather than a Vector3 and order.' );\n\n\t\t}\n\n\t\treturn this.applyQuaternion( _quaternion.setFromEuler( euler ) );\n\n\t},\n\n\tapplyAxisAngle: function ( axis, angle ) {\n\n\t\treturn this.applyQuaternion( _quaternion.setFromAxisAngle( axis, angle ) );\n\n\t},\n\n\tapplyMatrix3: function ( m ) {\n\n\t\tvar x = this.x, y = this.y, z = this.z;\n\t\tvar e = m.elements;\n\n\t\tthis.x = e[ 0 ] * x + e[ 3 ] * y + e[ 6 ] * z;\n\t\tthis.y = e[ 1 ] * x + e[ 4 ] * y + e[ 7 ] * z;\n\t\tthis.z = e[ 2 ] * x + e[ 5 ] * y + e[ 8 ] * z;\n\n\t\treturn this;\n\n\t},\n\n\tapplyNormalMatrix: function ( m ) {\n\n\t\treturn this.applyMatrix3( m ).normalize();\n\n\t},\n\n\tapplyMatrix4: function ( m ) {\n\n\t\tvar x = this.x, y = this.y, z = this.z;\n\t\tvar e = m.elements;\n\n\t\tvar w = 1 / ( e[ 3 ] * x + e[ 7 ] * y + e[ 11 ] * z + e[ 15 ] );\n\n\t\tthis.x = ( e[ 0 ] * x + e[ 4 ] * y + e[ 8 ] * z + e[ 12 ] ) * w;\n\t\tthis.y = ( e[ 1 ] * x + e[ 5 ] * y + e[ 9 ] * z + e[ 13 ] ) * w;\n\t\tthis.z = ( e[ 2 ] * x + e[ 6 ] * y + e[ 10 ] * z + e[ 14 ] ) * w;\n\n\t\treturn this;\n\n\t},\n\n\tapplyQuaternion: function ( q ) {\n\n\t\tvar x = this.x, y = this.y, z = this.z;\n\t\tvar qx = q.x, qy = q.y, qz = q.z, qw = q.w;\n\n\t\t// calculate quat * vector\n\n\t\tvar ix = qw * x + qy * z - qz * y;\n\t\tvar iy = qw * y + qz * x - qx * z;\n\t\tvar iz = qw * z + qx * y - qy * x;\n\t\tvar iw = - qx * x - qy * y - qz * z;\n\n\t\t// calculate result * inverse quat\n\n\t\tthis.x = ix * qw + iw * - qx + iy * - qz - iz * - qy;\n\t\tthis.y = iy * qw + iw * - qy + iz * - qx - ix * - qz;\n\t\tthis.z = iz * qw + iw * - qz + ix * - qy - iy * - qx;\n\n\t\treturn this;\n\n\t},\n\n\tproject: function ( camera ) {\n\n\t\treturn this.applyMatrix4( camera.matrixWorldInverse ).applyMatrix4( camera.projectionMatrix );\n\n\t},\n\n\tunproject: function ( camera ) {\n\n\t\treturn this.applyMatrix4( camera.projectionMatrixInverse ).applyMatrix4( camera.matrixWorld );\n\n\t},\n\n\ttransformDirection: function ( m ) {\n\n\t\t// input: THREE.Matrix4 affine matrix\n\t\t// vector interpreted as a direction\n\n\t\tvar x = this.x, y = this.y, z = this.z;\n\t\tvar e = m.elements;\n\n\t\tthis.x = e[ 0 ] * x + e[ 4 ] * y + e[ 8 ] * z;\n\t\tthis.y = e[ 1 ] * x + e[ 5 ] * y + e[ 9 ] * z;\n\t\tthis.z = e[ 2 ] * x + e[ 6 ] * y + e[ 10 ] * z;\n\n\t\treturn this.normalize();\n\n\t},\n\n\tdivide: function ( v ) {\n\n\t\tthis.x /= v.x;\n\t\tthis.y /= v.y;\n\t\tthis.z /= v.z;\n\n\t\treturn this;\n\n\t},\n\n\tdivideScalar: function ( scalar ) {\n\n\t\treturn this.multiplyScalar( 1 / scalar );\n\n\t},\n\n\tmin: function ( v ) {\n\n\t\tthis.x = Math.min( this.x, v.x );\n\t\tthis.y = Math.min( this.y, v.y );\n\t\tthis.z = Math.min( this.z, v.z );\n\n\t\treturn this;\n\n\t},\n\n\tmax: function ( v ) {\n\n\t\tthis.x = Math.max( this.x, v.x );\n\t\tthis.y = Math.max( this.y, v.y );\n\t\tthis.z = Math.max( this.z, v.z );\n\n\t\treturn this;\n\n\t},\n\n\tclamp: function ( min, max ) {\n\n\t\t// assumes min < max, componentwise\n\n\t\tthis.x = Math.max( min.x, Math.min( max.x, this.x ) );\n\t\tthis.y = Math.max( min.y, Math.min( max.y, this.y ) );\n\t\tthis.z = Math.max( min.z, Math.min( max.z, this.z ) );\n\n\t\treturn this;\n\n\t},\n\n\tclampScalar: function ( minVal, maxVal ) {\n\n\t\tthis.x = Math.max( minVal, Math.min( maxVal, this.x ) );\n\t\tthis.y = Math.max( minVal, Math.min( maxVal, this.y ) );\n\t\tthis.z = Math.max( minVal, Math.min( maxVal, this.z ) );\n\n\t\treturn this;\n\n\t},\n\n\tclampLength: function ( min, max ) {\n\n\t\tvar length = this.length();\n\n\t\treturn this.divideScalar( length || 1 ).multiplyScalar( Math.max( min, Math.min( max, length ) ) );\n\n\t},\n\n\tfloor: function () {\n\n\t\tthis.x = Math.floor( this.x );\n\t\tthis.y = Math.floor( this.y );\n\t\tthis.z = Math.floor( this.z );\n\n\t\treturn this;\n\n\t},\n\n\tceil: function () {\n\n\t\tthis.x = Math.ceil( this.x );\n\t\tthis.y = Math.ceil( this.y );\n\t\tthis.z = Math.ceil( this.z );\n\n\t\treturn this;\n\n\t},\n\n\tround: function () {\n\n\t\tthis.x = Math.round( this.x );\n\t\tthis.y = Math.round( this.y );\n\t\tthis.z = Math.round( this.z );\n\n\t\treturn this;\n\n\t},\n\n\troundToZero: function () {\n\n\t\tthis.x = ( this.x < 0 ) ? Math.ceil( this.x ) : Math.floor( this.x );\n\t\tthis.y = ( this.y < 0 ) ? Math.ceil( this.y ) : Math.floor( this.y );\n\t\tthis.z = ( this.z < 0 ) ? Math.ceil( this.z ) : Math.floor( this.z );\n\n\t\treturn this;\n\n\t},\n\n\tnegate: function () {\n\n\t\tthis.x = - this.x;\n\t\tthis.y = - this.y;\n\t\tthis.z = - this.z;\n\n\t\treturn this;\n\n\t},\n\n\tdot: function ( v ) {\n\n\t\treturn this.x * v.x + this.y * v.y + this.z * v.z;\n\n\t},\n\n\t// TODO lengthSquared?\n\n\tlengthSq: function () {\n\n\t\treturn this.x * this.x + this.y * this.y + this.z * this.z;\n\n\t},\n\n\tlength: function () {\n\n\t\treturn Math.sqrt( this.x * this.x + this.y * this.y + this.z * this.z );\n\n\t},\n\n\tmanhattanLength: function () {\n\n\t\treturn Math.abs( this.x ) + Math.abs( this.y ) + Math.abs( this.z );\n\n\t},\n\n\tnormalize: function () {\n\n\t\treturn this.divideScalar( this.length() || 1 );\n\n\t},\n\n\tsetLength: function ( length ) {\n\n\t\treturn this.normalize().multiplyScalar( length );\n\n\t},\n\n\tlerp: function ( v, alpha ) {\n\n\t\tthis.x += ( v.x - this.x ) * alpha;\n\t\tthis.y += ( v.y - this.y ) * alpha;\n\t\tthis.z += ( v.z - this.z ) * alpha;\n\n\t\treturn this;\n\n\t},\n\n\tlerpVectors: function ( v1, v2, alpha ) {\n\n\t\treturn this.subVectors( v2, v1 ).multiplyScalar( alpha ).add( v1 );\n\n\t},\n\n\tcross: function ( v, w ) {\n\n\t\tif ( w !== undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Vector3: .cross() now only accepts one argument. Use .crossVectors( a, b ) instead.' );\n\t\t\treturn this.crossVectors( v, w );\n\n\t\t}\n\n\t\treturn this.crossVectors( this, v );\n\n\t},\n\n\tcrossVectors: function ( a, b ) {\n\n\t\tvar ax = a.x, ay = a.y, az = a.z;\n\t\tvar bx = b.x, by = b.y, bz = b.z;\n\n\t\tthis.x = ay * bz - az * by;\n\t\tthis.y = az * bx - ax * bz;\n\t\tthis.z = ax * by - ay * bx;\n\n\t\treturn this;\n\n\t},\n\n\tprojectOnVector: function ( v ) {\n\n\t\tvar denominator = v.lengthSq();\n\n\t\tif ( denominator === 0 ) return this.set( 0, 0, 0 );\n\n\t\tvar scalar = v.dot( this ) / denominator;\n\n\t\treturn this.copy( v ).multiplyScalar( scalar );\n\n\t},\n\n\tprojectOnPlane: function ( planeNormal ) {\n\n\t\t_vector.copy( this ).projectOnVector( planeNormal );\n\n\t\treturn this.sub( _vector );\n\n\t},\n\n\treflect: function ( normal ) {\n\n\t\t// reflect incident vector off plane orthogonal to normal\n\t\t// normal is assumed to have unit length\n\n\t\treturn this.sub( _vector.copy( normal ).multiplyScalar( 2 * this.dot( normal ) ) );\n\n\t},\n\n\tangleTo: function ( v ) {\n\n\t\tvar denominator = Math.sqrt( this.lengthSq() * v.lengthSq() );\n\n\t\tif ( denominator === 0 ) return Math.PI / 2;\n\n\t\tvar theta = this.dot( v ) / denominator;\n\n\t\t// clamp, to handle numerical problems\n\n\t\treturn Math.acos( MathUtils.clamp( theta, - 1, 1 ) );\n\n\t},\n\n\tdistanceTo: function ( v ) {\n\n\t\treturn Math.sqrt( this.distanceToSquared( v ) );\n\n\t},\n\n\tdistanceToSquared: function ( v ) {\n\n\t\tvar dx = this.x - v.x, dy = this.y - v.y, dz = this.z - v.z;\n\n\t\treturn dx * dx + dy * dy + dz * dz;\n\n\t},\n\n\tmanhattanDistanceTo: function ( v ) {\n\n\t\treturn Math.abs( this.x - v.x ) + Math.abs( this.y - v.y ) + Math.abs( this.z - v.z );\n\n\t},\n\n\tsetFromSpherical: function ( s ) {\n\n\t\treturn this.setFromSphericalCoords( s.radius, s.phi, s.theta );\n\n\t},\n\n\tsetFromSphericalCoords: function ( radius, phi, theta ) {\n\n\t\tvar sinPhiRadius = Math.sin( phi ) * radius;\n\n\t\tthis.x = sinPhiRadius * Math.sin( theta );\n\t\tthis.y = Math.cos( phi ) * radius;\n\t\tthis.z = sinPhiRadius * Math.cos( theta );\n\n\t\treturn this;\n\n\t},\n\n\tsetFromCylindrical: function ( c ) {\n\n\t\treturn this.setFromCylindricalCoords( c.radius, c.theta, c.y );\n\n\t},\n\n\tsetFromCylindricalCoords: function ( radius, theta, y ) {\n\n\t\tthis.x = radius * Math.sin( theta );\n\t\tthis.y = y;\n\t\tthis.z = radius * Math.cos( theta );\n\n\t\treturn this;\n\n\t},\n\n\tsetFromMatrixPosition: function ( m ) {\n\n\t\tvar e = m.elements;\n\n\t\tthis.x = e[ 12 ];\n\t\tthis.y = e[ 13 ];\n\t\tthis.z = e[ 14 ];\n\n\t\treturn this;\n\n\t},\n\n\tsetFromMatrixScale: function ( m ) {\n\n\t\tvar sx = this.setFromMatrixColumn( m, 0 ).length();\n\t\tvar sy = this.setFromMatrixColumn( m, 1 ).length();\n\t\tvar sz = this.setFromMatrixColumn( m, 2 ).length();\n\n\t\tthis.x = sx;\n\t\tthis.y = sy;\n\t\tthis.z = sz;\n\n\t\treturn this;\n\n\t},\n\n\tsetFromMatrixColumn: function ( m, index ) {\n\n\t\treturn this.fromArray( m.elements, index * 4 );\n\n\t},\n\n\tsetFromMatrix3Column: function ( m, index ) {\n\n\t\treturn this.fromArray( m.elements, index * 3 );\n\n\t},\n\n\tequals: function ( v ) {\n\n\t\treturn ( ( v.x === this.x ) && ( v.y === this.y ) && ( v.z === this.z ) );\n\n\t},\n\n\tfromArray: function ( array, offset ) {\n\n\t\tif ( offset === undefined ) offset = 0;\n\n\t\tthis.x = array[ offset ];\n\t\tthis.y = array[ offset + 1 ];\n\t\tthis.z = array[ offset + 2 ];\n\n\t\treturn this;\n\n\t},\n\n\ttoArray: function ( array, offset ) {\n\n\t\tif ( array === undefined ) array = [];\n\t\tif ( offset === undefined ) offset = 0;\n\n\t\tarray[ offset ] = this.x;\n\t\tarray[ offset + 1 ] = this.y;\n\t\tarray[ offset + 2 ] = this.z;\n\n\t\treturn array;\n\n\t},\n\n\tfromBufferAttribute: function ( attribute, index, offset ) {\n\n\t\tif ( offset !== undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Vector3: offset has been removed from .fromBufferAttribute().' );\n\n\t\t}\n\n\t\tthis.x = attribute.getX( index );\n\t\tthis.y = attribute.getY( index );\n\t\tthis.z = attribute.getZ( index );\n\n\t\treturn this;\n\n\t}\n\n} );\n\nvar _v1 = new Vector3();\nvar _m1 = new Matrix4();\nvar _zero = new Vector3( 0, 0, 0 );\nvar _one = new Vector3( 1, 1, 1 );\nvar _x = new Vector3();\nvar _y = new Vector3();\nvar _z = new Vector3();\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author supereggbert / http://www.paulbrunt.co.uk/\n * @author philogb / http://blog.thejit.org/\n * @author jordi_ros / http://plattsoft.com\n * @author D1plo1d / http://github.com/D1plo1d\n * @author alteredq / http://alteredqualia.com/\n * @author mikael emtinger / http://gomo.se/\n * @author timknip / http://www.floorplanner.com/\n * @author bhouston / http://clara.io\n * @author WestLangley / http://github.com/WestLangley\n */\n\nfunction Matrix4() {\n\n\tthis.elements = [\n\n\t\t1, 0, 0, 0,\n\t\t0, 1, 0, 0,\n\t\t0, 0, 1, 0,\n\t\t0, 0, 0, 1\n\n\t];\n\n\tif ( arguments.length > 0 ) {\n\n\t\tconsole.error( 'THREE.Matrix4: the constructor no longer reads arguments. use .set() instead.' );\n\n\t}\n\n}\n\nObject.assign( Matrix4.prototype, {\n\n\tisMatrix4: true,\n\n\tset: function ( n11, n12, n13, n14, n21, n22, n23, n24, n31, n32, n33, n34, n41, n42, n43, n44 ) {\n\n\t\tvar te = this.elements;\n\n\t\tte[ 0 ] = n11; te[ 4 ] = n12; te[ 8 ] = n13; te[ 12 ] = n14;\n\t\tte[ 1 ] = n21; te[ 5 ] = n22; te[ 9 ] = n23; te[ 13 ] = n24;\n\t\tte[ 2 ] = n31; te[ 6 ] = n32; te[ 10 ] = n33; te[ 14 ] = n34;\n\t\tte[ 3 ] = n41; te[ 7 ] = n42; te[ 11 ] = n43; te[ 15 ] = n44;\n\n\t\treturn this;\n\n\t},\n\n\tidentity: function () {\n\n\t\tthis.set(\n\n\t\t\t1, 0, 0, 0,\n\t\t\t0, 1, 0, 0,\n\t\t\t0, 0, 1, 0,\n\t\t\t0, 0, 0, 1\n\n\t\t);\n\n\t\treturn this;\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new Matrix4().fromArray( this.elements );\n\n\t},\n\n\tcopy: function ( m ) {\n\n\t\tvar te = this.elements;\n\t\tvar me = m.elements;\n\n\t\tte[ 0 ] = me[ 0 ]; te[ 1 ] = me[ 1 ]; te[ 2 ] = me[ 2 ]; te[ 3 ] = me[ 3 ];\n\t\tte[ 4 ] = me[ 4 ]; te[ 5 ] = me[ 5 ]; te[ 6 ] = me[ 6 ]; te[ 7 ] = me[ 7 ];\n\t\tte[ 8 ] = me[ 8 ]; te[ 9 ] = me[ 9 ]; te[ 10 ] = me[ 10 ]; te[ 11 ] = me[ 11 ];\n\t\tte[ 12 ] = me[ 12 ]; te[ 13 ] = me[ 13 ]; te[ 14 ] = me[ 14 ]; te[ 15 ] = me[ 15 ];\n\n\t\treturn this;\n\n\t},\n\n\tcopyPosition: function ( m ) {\n\n\t\tvar te = this.elements, me = m.elements;\n\n\t\tte[ 12 ] = me[ 12 ];\n\t\tte[ 13 ] = me[ 13 ];\n\t\tte[ 14 ] = me[ 14 ];\n\n\t\treturn this;\n\n\t},\n\n\textractBasis: function ( xAxis, yAxis, zAxis ) {\n\n\t\txAxis.setFromMatrixColumn( this, 0 );\n\t\tyAxis.setFromMatrixColumn( this, 1 );\n\t\tzAxis.setFromMatrixColumn( this, 2 );\n\n\t\treturn this;\n\n\t},\n\n\tmakeBasis: function ( xAxis, yAxis, zAxis ) {\n\n\t\tthis.set(\n\t\t\txAxis.x, yAxis.x, zAxis.x, 0,\n\t\t\txAxis.y, yAxis.y, zAxis.y, 0,\n\t\t\txAxis.z, yAxis.z, zAxis.z, 0,\n\t\t\t0, 0, 0, 1\n\t\t);\n\n\t\treturn this;\n\n\t},\n\n\textractRotation: function ( m ) {\n\n\t\t// this method does not support reflection matrices\n\n\t\tvar te = this.elements;\n\t\tvar me = m.elements;\n\n\t\tvar scaleX = 1 / _v1.setFromMatrixColumn( m, 0 ).length();\n\t\tvar scaleY = 1 / _v1.setFromMatrixColumn( m, 1 ).length();\n\t\tvar scaleZ = 1 / _v1.setFromMatrixColumn( m, 2 ).length();\n\n\t\tte[ 0 ] = me[ 0 ] * scaleX;\n\t\tte[ 1 ] = me[ 1 ] * scaleX;\n\t\tte[ 2 ] = me[ 2 ] * scaleX;\n\t\tte[ 3 ] = 0;\n\n\t\tte[ 4 ] = me[ 4 ] * scaleY;\n\t\tte[ 5 ] = me[ 5 ] * scaleY;\n\t\tte[ 6 ] = me[ 6 ] * scaleY;\n\t\tte[ 7 ] = 0;\n\n\t\tte[ 8 ] = me[ 8 ] * scaleZ;\n\t\tte[ 9 ] = me[ 9 ] * scaleZ;\n\t\tte[ 10 ] = me[ 10 ] * scaleZ;\n\t\tte[ 11 ] = 0;\n\n\t\tte[ 12 ] = 0;\n\t\tte[ 13 ] = 0;\n\t\tte[ 14 ] = 0;\n\t\tte[ 15 ] = 1;\n\n\t\treturn this;\n\n\t},\n\n\tmakeRotationFromEuler: function ( euler ) {\n\n\t\tif ( ! ( euler && euler.isEuler ) ) {\n\n\t\t\tconsole.error( 'THREE.Matrix4: .makeRotationFromEuler() now expects a Euler rotation rather than a Vector3 and order.' );\n\n\t\t}\n\n\t\tvar te = this.elements;\n\n\t\tvar x = euler.x, y = euler.y, z = euler.z;\n\t\tvar a = Math.cos( x ), b = Math.sin( x );\n\t\tvar c = Math.cos( y ), d = Math.sin( y );\n\t\tvar e = Math.cos( z ), f = Math.sin( z );\n\n\t\tif ( euler.order === 'XYZ' ) {\n\n\t\t\tvar ae = a * e, af = a * f, be = b * e, bf = b * f;\n\n\t\t\tte[ 0 ] = c * e;\n\t\t\tte[ 4 ] = - c * f;\n\t\t\tte[ 8 ] = d;\n\n\t\t\tte[ 1 ] = af + be * d;\n\t\t\tte[ 5 ] = ae - bf * d;\n\t\t\tte[ 9 ] = - b * c;\n\n\t\t\tte[ 2 ] = bf - ae * d;\n\t\t\tte[ 6 ] = be + af * d;\n\t\t\tte[ 10 ] = a * c;\n\n\t\t} else if ( euler.order === 'YXZ' ) {\n\n\t\t\tvar ce = c * e, cf = c * f, de = d * e, df = d * f;\n\n\t\t\tte[ 0 ] = ce + df * b;\n\t\t\tte[ 4 ] = de * b - cf;\n\t\t\tte[ 8 ] = a * d;\n\n\t\t\tte[ 1 ] = a * f;\n\t\t\tte[ 5 ] = a * e;\n\t\t\tte[ 9 ] = - b;\n\n\t\t\tte[ 2 ] = cf * b - de;\n\t\t\tte[ 6 ] = df + ce * b;\n\t\t\tte[ 10 ] = a * c;\n\n\t\t} else if ( euler.order === 'ZXY' ) {\n\n\t\t\tvar ce = c * e, cf = c * f, de = d * e, df = d * f;\n\n\t\t\tte[ 0 ] = ce - df * b;\n\t\t\tte[ 4 ] = - a * f;\n\t\t\tte[ 8 ] = de + cf * b;\n\n\t\t\tte[ 1 ] = cf + de * b;\n\t\t\tte[ 5 ] = a * e;\n\t\t\tte[ 9 ] = df - ce * b;\n\n\t\t\tte[ 2 ] = - a * d;\n\t\t\tte[ 6 ] = b;\n\t\t\tte[ 10 ] = a * c;\n\n\t\t} else if ( euler.order === 'ZYX' ) {\n\n\t\t\tvar ae = a * e, af = a * f, be = b * e, bf = b * f;\n\n\t\t\tte[ 0 ] = c * e;\n\t\t\tte[ 4 ] = be * d - af;\n\t\t\tte[ 8 ] = ae * d + bf;\n\n\t\t\tte[ 1 ] = c * f;\n\t\t\tte[ 5 ] = bf * d + ae;\n\t\t\tte[ 9 ] = af * d - be;\n\n\t\t\tte[ 2 ] = - d;\n\t\t\tte[ 6 ] = b * c;\n\t\t\tte[ 10 ] = a * c;\n\n\t\t} else if ( euler.order === 'YZX' ) {\n\n\t\t\tvar ac = a * c, ad = a * d, bc = b * c, bd = b * d;\n\n\t\t\tte[ 0 ] = c * e;\n\t\t\tte[ 4 ] = bd - ac * f;\n\t\t\tte[ 8 ] = bc * f + ad;\n\n\t\t\tte[ 1 ] = f;\n\t\t\tte[ 5 ] = a * e;\n\t\t\tte[ 9 ] = - b * e;\n\n\t\t\tte[ 2 ] = - d * e;\n\t\t\tte[ 6 ] = ad * f + bc;\n\t\t\tte[ 10 ] = ac - bd * f;\n\n\t\t} else if ( euler.order === 'XZY' ) {\n\n\t\t\tvar ac = a * c, ad = a * d, bc = b * c, bd = b * d;\n\n\t\t\tte[ 0 ] = c * e;\n\t\t\tte[ 4 ] = - f;\n\t\t\tte[ 8 ] = d * e;\n\n\t\t\tte[ 1 ] = ac * f + bd;\n\t\t\tte[ 5 ] = a * e;\n\t\t\tte[ 9 ] = ad * f - bc;\n\n\t\t\tte[ 2 ] = bc * f - ad;\n\t\t\tte[ 6 ] = b * e;\n\t\t\tte[ 10 ] = bd * f + ac;\n\n\t\t}\n\n\t\t// bottom row\n\t\tte[ 3 ] = 0;\n\t\tte[ 7 ] = 0;\n\t\tte[ 11 ] = 0;\n\n\t\t// last column\n\t\tte[ 12 ] = 0;\n\t\tte[ 13 ] = 0;\n\t\tte[ 14 ] = 0;\n\t\tte[ 15 ] = 1;\n\n\t\treturn this;\n\n\t},\n\n\tmakeRotationFromQuaternion: function ( q ) {\n\n\t\treturn this.compose( _zero, q, _one );\n\n\t},\n\n\tlookAt: function ( eye, target, up ) {\n\n\t\tvar te = this.elements;\n\n\t\t_z.subVectors( eye, target );\n\n\t\tif ( _z.lengthSq() === 0 ) {\n\n\t\t\t// eye and target are in the same position\n\n\t\t\t_z.z = 1;\n\n\t\t}\n\n\t\t_z.normalize();\n\t\t_x.crossVectors( up, _z );\n\n\t\tif ( _x.lengthSq() === 0 ) {\n\n\t\t\t// up and z are parallel\n\n\t\t\tif ( Math.abs( up.z ) === 1 ) {\n\n\t\t\t\t_z.x += 0.0001;\n\n\t\t\t} else {\n\n\t\t\t\t_z.z += 0.0001;\n\n\t\t\t}\n\n\t\t\t_z.normalize();\n\t\t\t_x.crossVectors( up, _z );\n\n\t\t}\n\n\t\t_x.normalize();\n\t\t_y.crossVectors( _z, _x );\n\n\t\tte[ 0 ] = _x.x; te[ 4 ] = _y.x; te[ 8 ] = _z.x;\n\t\tte[ 1 ] = _x.y; te[ 5 ] = _y.y; te[ 9 ] = _z.y;\n\t\tte[ 2 ] = _x.z; te[ 6 ] = _y.z; te[ 10 ] = _z.z;\n\n\t\treturn this;\n\n\t},\n\n\tmultiply: function ( m, n ) {\n\n\t\tif ( n !== undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Matrix4: .multiply() now only accepts one argument. Use .multiplyMatrices( a, b ) instead.' );\n\t\t\treturn this.multiplyMatrices( m, n );\n\n\t\t}\n\n\t\treturn this.multiplyMatrices( this, m );\n\n\t},\n\n\tpremultiply: function ( m ) {\n\n\t\treturn this.multiplyMatrices( m, this );\n\n\t},\n\n\tmultiplyMatrices: function ( a, b ) {\n\n\t\tvar ae = a.elements;\n\t\tvar be = b.elements;\n\t\tvar te = this.elements;\n\n\t\tvar a11 = ae[ 0 ], a12 = ae[ 4 ], a13 = ae[ 8 ], a14 = ae[ 12 ];\n\t\tvar a21 = ae[ 1 ], a22 = ae[ 5 ], a23 = ae[ 9 ], a24 = ae[ 13 ];\n\t\tvar a31 = ae[ 2 ], a32 = ae[ 6 ], a33 = ae[ 10 ], a34 = ae[ 14 ];\n\t\tvar a41 = ae[ 3 ], a42 = ae[ 7 ], a43 = ae[ 11 ], a44 = ae[ 15 ];\n\n\t\tvar b11 = be[ 0 ], b12 = be[ 4 ], b13 = be[ 8 ], b14 = be[ 12 ];\n\t\tvar b21 = be[ 1 ], b22 = be[ 5 ], b23 = be[ 9 ], b24 = be[ 13 ];\n\t\tvar b31 = be[ 2 ], b32 = be[ 6 ], b33 = be[ 10 ], b34 = be[ 14 ];\n\t\tvar b41 = be[ 3 ], b42 = be[ 7 ], b43 = be[ 11 ], b44 = be[ 15 ];\n\n\t\tte[ 0 ] = a11 * b11 + a12 * b21 + a13 * b31 + a14 * b41;\n\t\tte[ 4 ] = a11 * b12 + a12 * b22 + a13 * b32 + a14 * b42;\n\t\tte[ 8 ] = a11 * b13 + a12 * b23 + a13 * b33 + a14 * b43;\n\t\tte[ 12 ] = a11 * b14 + a12 * b24 + a13 * b34 + a14 * b44;\n\n\t\tte[ 1 ] = a21 * b11 + a22 * b21 + a23 * b31 + a24 * b41;\n\t\tte[ 5 ] = a21 * b12 + a22 * b22 + a23 * b32 + a24 * b42;\n\t\tte[ 9 ] = a21 * b13 + a22 * b23 + a23 * b33 + a24 * b43;\n\t\tte[ 13 ] = a21 * b14 + a22 * b24 + a23 * b34 + a24 * b44;\n\n\t\tte[ 2 ] = a31 * b11 + a32 * b21 + a33 * b31 + a34 * b41;\n\t\tte[ 6 ] = a31 * b12 + a32 * b22 + a33 * b32 + a34 * b42;\n\t\tte[ 10 ] = a31 * b13 + a32 * b23 + a33 * b33 + a34 * b43;\n\t\tte[ 14 ] = a31 * b14 + a32 * b24 + a33 * b34 + a34 * b44;\n\n\t\tte[ 3 ] = a41 * b11 + a42 * b21 + a43 * b31 + a44 * b41;\n\t\tte[ 7 ] = a41 * b12 + a42 * b22 + a43 * b32 + a44 * b42;\n\t\tte[ 11 ] = a41 * b13 + a42 * b23 + a43 * b33 + a44 * b43;\n\t\tte[ 15 ] = a41 * b14 + a42 * b24 + a43 * b34 + a44 * b44;\n\n\t\treturn this;\n\n\t},\n\n\tmultiplyScalar: function ( s ) {\n\n\t\tvar te = this.elements;\n\n\t\tte[ 0 ] *= s; te[ 4 ] *= s; te[ 8 ] *= s; te[ 12 ] *= s;\n\t\tte[ 1 ] *= s; te[ 5 ] *= s; te[ 9 ] *= s; te[ 13 ] *= s;\n\t\tte[ 2 ] *= s; te[ 6 ] *= s; te[ 10 ] *= s; te[ 14 ] *= s;\n\t\tte[ 3 ] *= s; te[ 7 ] *= s; te[ 11 ] *= s; te[ 15 ] *= s;\n\n\t\treturn this;\n\n\t},\n\n\tdeterminant: function () {\n\n\t\tvar te = this.elements;\n\n\t\tvar n11 = te[ 0 ], n12 = te[ 4 ], n13 = te[ 8 ], n14 = te[ 12 ];\n\t\tvar n21 = te[ 1 ], n22 = te[ 5 ], n23 = te[ 9 ], n24 = te[ 13 ];\n\t\tvar n31 = te[ 2 ], n32 = te[ 6 ], n33 = te[ 10 ], n34 = te[ 14 ];\n\t\tvar n41 = te[ 3 ], n42 = te[ 7 ], n43 = te[ 11 ], n44 = te[ 15 ];\n\n\t\t//TODO: make this more efficient\n\t\t//( based on http://www.euclideanspace.com/maths/algebra/matrix/functions/inverse/fourD/index.htm )\n\n\t\treturn (\n\t\t\tn41 * (\n\t\t\t\t+ n14 * n23 * n32\n\t\t\t\t - n13 * n24 * n32\n\t\t\t\t - n14 * n22 * n33\n\t\t\t\t + n12 * n24 * n33\n\t\t\t\t + n13 * n22 * n34\n\t\t\t\t - n12 * n23 * n34\n\t\t\t) +\n\t\t\tn42 * (\n\t\t\t\t+ n11 * n23 * n34\n\t\t\t\t - n11 * n24 * n33\n\t\t\t\t + n14 * n21 * n33\n\t\t\t\t - n13 * n21 * n34\n\t\t\t\t + n13 * n24 * n31\n\t\t\t\t - n14 * n23 * n31\n\t\t\t) +\n\t\t\tn43 * (\n\t\t\t\t+ n11 * n24 * n32\n\t\t\t\t - n11 * n22 * n34\n\t\t\t\t - n14 * n21 * n32\n\t\t\t\t + n12 * n21 * n34\n\t\t\t\t + n14 * n22 * n31\n\t\t\t\t - n12 * n24 * n31\n\t\t\t) +\n\t\t\tn44 * (\n\t\t\t\t- n13 * n22 * n31\n\t\t\t\t - n11 * n23 * n32\n\t\t\t\t + n11 * n22 * n33\n\t\t\t\t + n13 * n21 * n32\n\t\t\t\t - n12 * n21 * n33\n\t\t\t\t + n12 * n23 * n31\n\t\t\t)\n\n\t\t);\n\n\t},\n\n\ttranspose: function () {\n\n\t\tvar te = this.elements;\n\t\tvar tmp;\n\n\t\ttmp = te[ 1 ]; te[ 1 ] = te[ 4 ]; te[ 4 ] = tmp;\n\t\ttmp = te[ 2 ]; te[ 2 ] = te[ 8 ]; te[ 8 ] = tmp;\n\t\ttmp = te[ 6 ]; te[ 6 ] = te[ 9 ]; te[ 9 ] = tmp;\n\n\t\ttmp = te[ 3 ]; te[ 3 ] = te[ 12 ]; te[ 12 ] = tmp;\n\t\ttmp = te[ 7 ]; te[ 7 ] = te[ 13 ]; te[ 13 ] = tmp;\n\t\ttmp = te[ 11 ]; te[ 11 ] = te[ 14 ]; te[ 14 ] = tmp;\n\n\t\treturn this;\n\n\t},\n\n\tsetPosition: function ( x, y, z ) {\n\n\t\tvar te = this.elements;\n\n\t\tif ( x.isVector3 ) {\n\n\t\t\tte[ 12 ] = x.x;\n\t\t\tte[ 13 ] = x.y;\n\t\t\tte[ 14 ] = x.z;\n\n\t\t} else {\n\n\t\t\tte[ 12 ] = x;\n\t\t\tte[ 13 ] = y;\n\t\t\tte[ 14 ] = z;\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tgetInverse: function ( m, throwOnDegenerate ) {\n\n\t\t// based on http://www.euclideanspace.com/maths/algebra/matrix/functions/inverse/fourD/index.htm\n\t\tvar te = this.elements,\n\t\t\tme = m.elements,\n\n\t\t\tn11 = me[ 0 ], n21 = me[ 1 ], n31 = me[ 2 ], n41 = me[ 3 ],\n\t\t\tn12 = me[ 4 ], n22 = me[ 5 ], n32 = me[ 6 ], n42 = me[ 7 ],\n\t\t\tn13 = me[ 8 ], n23 = me[ 9 ], n33 = me[ 10 ], n43 = me[ 11 ],\n\t\t\tn14 = me[ 12 ], n24 = me[ 13 ], n34 = me[ 14 ], n44 = me[ 15 ],\n\n\t\t\tt11 = n23 * n34 * n42 - n24 * n33 * n42 + n24 * n32 * n43 - n22 * n34 * n43 - n23 * n32 * n44 + n22 * n33 * n44,\n\t\t\tt12 = n14 * n33 * n42 - n13 * n34 * n42 - n14 * n32 * n43 + n12 * n34 * n43 + n13 * n32 * n44 - n12 * n33 * n44,\n\t\t\tt13 = n13 * n24 * n42 - n14 * n23 * n42 + n14 * n22 * n43 - n12 * n24 * n43 - n13 * n22 * n44 + n12 * n23 * n44,\n\t\t\tt14 = n14 * n23 * n32 - n13 * n24 * n32 - n14 * n22 * n33 + n12 * n24 * n33 + n13 * n22 * n34 - n12 * n23 * n34;\n\n\t\tvar det = n11 * t11 + n21 * t12 + n31 * t13 + n41 * t14;\n\n\t\tif ( det === 0 ) {\n\n\t\t\tvar msg = \"THREE.Matrix4: .getInverse() can't invert matrix, determinant is 0\";\n\n\t\t\tif ( throwOnDegenerate === true ) {\n\n\t\t\t\tthrow new Error( msg );\n\n\t\t\t} else {\n\n\t\t\t\tconsole.warn( msg );\n\n\t\t\t}\n\n\t\t\treturn this.identity();\n\n\t\t}\n\n\t\tvar detInv = 1 / det;\n\n\t\tte[ 0 ] = t11 * detInv;\n\t\tte[ 1 ] = ( n24 * n33 * n41 - n23 * n34 * n41 - n24 * n31 * n43 + n21 * n34 * n43 + n23 * n31 * n44 - n21 * n33 * n44 ) * detInv;\n\t\tte[ 2 ] = ( n22 * n34 * n41 - n24 * n32 * n41 + n24 * n31 * n42 - n21 * n34 * n42 - n22 * n31 * n44 + n21 * n32 * n44 ) * detInv;\n\t\tte[ 3 ] = ( n23 * n32 * n41 - n22 * n33 * n41 - n23 * n31 * n42 + n21 * n33 * n42 + n22 * n31 * n43 - n21 * n32 * n43 ) * detInv;\n\n\t\tte[ 4 ] = t12 * detInv;\n\t\tte[ 5 ] = ( n13 * n34 * n41 - n14 * n33 * n41 + n14 * n31 * n43 - n11 * n34 * n43 - n13 * n31 * n44 + n11 * n33 * n44 ) * detInv;\n\t\tte[ 6 ] = ( n14 * n32 * n41 - n12 * n34 * n41 - n14 * n31 * n42 + n11 * n34 * n42 + n12 * n31 * n44 - n11 * n32 * n44 ) * detInv;\n\t\tte[ 7 ] = ( n12 * n33 * n41 - n13 * n32 * n41 + n13 * n31 * n42 - n11 * n33 * n42 - n12 * n31 * n43 + n11 * n32 * n43 ) * detInv;\n\n\t\tte[ 8 ] = t13 * detInv;\n\t\tte[ 9 ] = ( n14 * n23 * n41 - n13 * n24 * n41 - n14 * n21 * n43 + n11 * n24 * n43 + n13 * n21 * n44 - n11 * n23 * n44 ) * detInv;\n\t\tte[ 10 ] = ( n12 * n24 * n41 - n14 * n22 * n41 + n14 * n21 * n42 - n11 * n24 * n42 - n12 * n21 * n44 + n11 * n22 * n44 ) * detInv;\n\t\tte[ 11 ] = ( n13 * n22 * n41 - n12 * n23 * n41 - n13 * n21 * n42 + n11 * n23 * n42 + n12 * n21 * n43 - n11 * n22 * n43 ) * detInv;\n\n\t\tte[ 12 ] = t14 * detInv;\n\t\tte[ 13 ] = ( n13 * n24 * n31 - n14 * n23 * n31 + n14 * n21 * n33 - n11 * n24 * n33 - n13 * n21 * n34 + n11 * n23 * n34 ) * detInv;\n\t\tte[ 14 ] = ( n14 * n22 * n31 - n12 * n24 * n31 - n14 * n21 * n32 + n11 * n24 * n32 + n12 * n21 * n34 - n11 * n22 * n34 ) * detInv;\n\t\tte[ 15 ] = ( n12 * n23 * n31 - n13 * n22 * n31 + n13 * n21 * n32 - n11 * n23 * n32 - n12 * n21 * n33 + n11 * n22 * n33 ) * detInv;\n\n\t\treturn this;\n\n\t},\n\n\tscale: function ( v ) {\n\n\t\tvar te = this.elements;\n\t\tvar x = v.x, y = v.y, z = v.z;\n\n\t\tte[ 0 ] *= x; te[ 4 ] *= y; te[ 8 ] *= z;\n\t\tte[ 1 ] *= x; te[ 5 ] *= y; te[ 9 ] *= z;\n\t\tte[ 2 ] *= x; te[ 6 ] *= y; te[ 10 ] *= z;\n\t\tte[ 3 ] *= x; te[ 7 ] *= y; te[ 11 ] *= z;\n\n\t\treturn this;\n\n\t},\n\n\tgetMaxScaleOnAxis: function () {\n\n\t\tvar te = this.elements;\n\n\t\tvar scaleXSq = te[ 0 ] * te[ 0 ] + te[ 1 ] * te[ 1 ] + te[ 2 ] * te[ 2 ];\n\t\tvar scaleYSq = te[ 4 ] * te[ 4 ] + te[ 5 ] * te[ 5 ] + te[ 6 ] * te[ 6 ];\n\t\tvar scaleZSq = te[ 8 ] * te[ 8 ] + te[ 9 ] * te[ 9 ] + te[ 10 ] * te[ 10 ];\n\n\t\treturn Math.sqrt( Math.max( scaleXSq, scaleYSq, scaleZSq ) );\n\n\t},\n\n\tmakeTranslation: function ( x, y, z ) {\n\n\t\tthis.set(\n\n\t\t\t1, 0, 0, x,\n\t\t\t0, 1, 0, y,\n\t\t\t0, 0, 1, z,\n\t\t\t0, 0, 0, 1\n\n\t\t);\n\n\t\treturn this;\n\n\t},\n\n\tmakeRotationX: function ( theta ) {\n\n\t\tvar c = Math.cos( theta ), s = Math.sin( theta );\n\n\t\tthis.set(\n\n\t\t\t1, 0, 0, 0,\n\t\t\t0, c, - s, 0,\n\t\t\t0, s, c, 0,\n\t\t\t0, 0, 0, 1\n\n\t\t);\n\n\t\treturn this;\n\n\t},\n\n\tmakeRotationY: function ( theta ) {\n\n\t\tvar c = Math.cos( theta ), s = Math.sin( theta );\n\n\t\tthis.set(\n\n\t\t\t c, 0, s, 0,\n\t\t\t 0, 1, 0, 0,\n\t\t\t- s, 0, c, 0,\n\t\t\t 0, 0, 0, 1\n\n\t\t);\n\n\t\treturn this;\n\n\t},\n\n\tmakeRotationZ: function ( theta ) {\n\n\t\tvar c = Math.cos( theta ), s = Math.sin( theta );\n\n\t\tthis.set(\n\n\t\t\tc, - s, 0, 0,\n\t\t\ts, c, 0, 0,\n\t\t\t0, 0, 1, 0,\n\t\t\t0, 0, 0, 1\n\n\t\t);\n\n\t\treturn this;\n\n\t},\n\n\tmakeRotationAxis: function ( axis, angle ) {\n\n\t\t// Based on http://www.gamedev.net/reference/articles/article1199.asp\n\n\t\tvar c = Math.cos( angle );\n\t\tvar s = Math.sin( angle );\n\t\tvar t = 1 - c;\n\t\tvar x = axis.x, y = axis.y, z = axis.z;\n\t\tvar tx = t * x, ty = t * y;\n\n\t\tthis.set(\n\n\t\t\ttx * x + c, tx * y - s * z, tx * z + s * y, 0,\n\t\t\ttx * y + s * z, ty * y + c, ty * z - s * x, 0,\n\t\t\ttx * z - s * y, ty * z + s * x, t * z * z + c, 0,\n\t\t\t0, 0, 0, 1\n\n\t\t);\n\n\t\t return this;\n\n\t},\n\n\tmakeScale: function ( x, y, z ) {\n\n\t\tthis.set(\n\n\t\t\tx, 0, 0, 0,\n\t\t\t0, y, 0, 0,\n\t\t\t0, 0, z, 0,\n\t\t\t0, 0, 0, 1\n\n\t\t);\n\n\t\treturn this;\n\n\t},\n\n\tmakeShear: function ( x, y, z ) {\n\n\t\tthis.set(\n\n\t\t\t1, y, z, 0,\n\t\t\tx, 1, z, 0,\n\t\t\tx, y, 1, 0,\n\t\t\t0, 0, 0, 1\n\n\t\t);\n\n\t\treturn this;\n\n\t},\n\n\tcompose: function ( position, quaternion, scale ) {\n\n\t\tvar te = this.elements;\n\n\t\tvar x = quaternion._x, y = quaternion._y, z = quaternion._z, w = quaternion._w;\n\t\tvar x2 = x + x,\ty2 = y + y, z2 = z + z;\n\t\tvar xx = x * x2, xy = x * y2, xz = x * z2;\n\t\tvar yy = y * y2, yz = y * z2, zz = z * z2;\n\t\tvar wx = w * x2, wy = w * y2, wz = w * z2;\n\n\t\tvar sx = scale.x, sy = scale.y, sz = scale.z;\n\n\t\tte[ 0 ] = ( 1 - ( yy + zz ) ) * sx;\n\t\tte[ 1 ] = ( xy + wz ) * sx;\n\t\tte[ 2 ] = ( xz - wy ) * sx;\n\t\tte[ 3 ] = 0;\n\n\t\tte[ 4 ] = ( xy - wz ) * sy;\n\t\tte[ 5 ] = ( 1 - ( xx + zz ) ) * sy;\n\t\tte[ 6 ] = ( yz + wx ) * sy;\n\t\tte[ 7 ] = 0;\n\n\t\tte[ 8 ] = ( xz + wy ) * sz;\n\t\tte[ 9 ] = ( yz - wx ) * sz;\n\t\tte[ 10 ] = ( 1 - ( xx + yy ) ) * sz;\n\t\tte[ 11 ] = 0;\n\n\t\tte[ 12 ] = position.x;\n\t\tte[ 13 ] = position.y;\n\t\tte[ 14 ] = position.z;\n\t\tte[ 15 ] = 1;\n\n\t\treturn this;\n\n\t},\n\n\tdecompose: function ( position, quaternion, scale ) {\n\n\t\tvar te = this.elements;\n\n\t\tvar sx = _v1.set( te[ 0 ], te[ 1 ], te[ 2 ] ).length();\n\t\tvar sy = _v1.set( te[ 4 ], te[ 5 ], te[ 6 ] ).length();\n\t\tvar sz = _v1.set( te[ 8 ], te[ 9 ], te[ 10 ] ).length();\n\n\t\t// if determine is negative, we need to invert one scale\n\t\tvar det = this.determinant();\n\t\tif ( det < 0 ) sx = - sx;\n\n\t\tposition.x = te[ 12 ];\n\t\tposition.y = te[ 13 ];\n\t\tposition.z = te[ 14 ];\n\n\t\t// scale the rotation part\n\t\t_m1.copy( this );\n\n\t\tvar invSX = 1 / sx;\n\t\tvar invSY = 1 / sy;\n\t\tvar invSZ = 1 / sz;\n\n\t\t_m1.elements[ 0 ] *= invSX;\n\t\t_m1.elements[ 1 ] *= invSX;\n\t\t_m1.elements[ 2 ] *= invSX;\n\n\t\t_m1.elements[ 4 ] *= invSY;\n\t\t_m1.elements[ 5 ] *= invSY;\n\t\t_m1.elements[ 6 ] *= invSY;\n\n\t\t_m1.elements[ 8 ] *= invSZ;\n\t\t_m1.elements[ 9 ] *= invSZ;\n\t\t_m1.elements[ 10 ] *= invSZ;\n\n\t\tquaternion.setFromRotationMatrix( _m1 );\n\n\t\tscale.x = sx;\n\t\tscale.y = sy;\n\t\tscale.z = sz;\n\n\t\treturn this;\n\n\t},\n\n\tmakePerspective: function ( left, right, top, bottom, near, far ) {\n\n\t\tif ( far === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Matrix4: .makePerspective() has been redefined and has a new signature. Please check the docs.' );\n\n\t\t}\n\n\t\tvar te = this.elements;\n\t\tvar x = 2 * near / ( right - left );\n\t\tvar y = 2 * near / ( top - bottom );\n\n\t\tvar a = ( right + left ) / ( right - left );\n\t\tvar b = ( top + bottom ) / ( top - bottom );\n\t\tvar c = - ( far + near ) / ( far - near );\n\t\tvar d = - 2 * far * near / ( far - near );\n\n\t\tte[ 0 ] = x;\tte[ 4 ] = 0;\tte[ 8 ] = a;\tte[ 12 ] = 0;\n\t\tte[ 1 ] = 0;\tte[ 5 ] = y;\tte[ 9 ] = b;\tte[ 13 ] = 0;\n\t\tte[ 2 ] = 0;\tte[ 6 ] = 0;\tte[ 10 ] = c;\tte[ 14 ] = d;\n\t\tte[ 3 ] = 0;\tte[ 7 ] = 0;\tte[ 11 ] = - 1;\tte[ 15 ] = 0;\n\n\t\treturn this;\n\n\t},\n\n\tmakeOrthographic: function ( left, right, top, bottom, near, far ) {\n\n\t\tvar te = this.elements;\n\t\tvar w = 1.0 / ( right - left );\n\t\tvar h = 1.0 / ( top - bottom );\n\t\tvar p = 1.0 / ( far - near );\n\n\t\tvar x = ( right + left ) * w;\n\t\tvar y = ( top + bottom ) * h;\n\t\tvar z = ( far + near ) * p;\n\n\t\tte[ 0 ] = 2 * w;\tte[ 4 ] = 0;\tte[ 8 ] = 0;\tte[ 12 ] = - x;\n\t\tte[ 1 ] = 0;\tte[ 5 ] = 2 * h;\tte[ 9 ] = 0;\tte[ 13 ] = - y;\n\t\tte[ 2 ] = 0;\tte[ 6 ] = 0;\tte[ 10 ] = - 2 * p;\tte[ 14 ] = - z;\n\t\tte[ 3 ] = 0;\tte[ 7 ] = 0;\tte[ 11 ] = 0;\tte[ 15 ] = 1;\n\n\t\treturn this;\n\n\t},\n\n\tequals: function ( matrix ) {\n\n\t\tvar te = this.elements;\n\t\tvar me = matrix.elements;\n\n\t\tfor ( var i = 0; i < 16; i ++ ) {\n\n\t\t\tif ( te[ i ] !== me[ i ] ) return false;\n\n\t\t}\n\n\t\treturn true;\n\n\t},\n\n\tfromArray: function ( array, offset ) {\n\n\t\tif ( offset === undefined ) offset = 0;\n\n\t\tfor ( var i = 0; i < 16; i ++ ) {\n\n\t\t\tthis.elements[ i ] = array[ i + offset ];\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\ttoArray: function ( array, offset ) {\n\n\t\tif ( array === undefined ) array = [];\n\t\tif ( offset === undefined ) offset = 0;\n\n\t\tvar te = this.elements;\n\n\t\tarray[ offset ] = te[ 0 ];\n\t\tarray[ offset + 1 ] = te[ 1 ];\n\t\tarray[ offset + 2 ] = te[ 2 ];\n\t\tarray[ offset + 3 ] = te[ 3 ];\n\n\t\tarray[ offset + 4 ] = te[ 4 ];\n\t\tarray[ offset + 5 ] = te[ 5 ];\n\t\tarray[ offset + 6 ] = te[ 6 ];\n\t\tarray[ offset + 7 ] = te[ 7 ];\n\n\t\tarray[ offset + 8 ] = te[ 8 ];\n\t\tarray[ offset + 9 ] = te[ 9 ];\n\t\tarray[ offset + 10 ] = te[ 10 ];\n\t\tarray[ offset + 11 ] = te[ 11 ];\n\n\t\tarray[ offset + 12 ] = te[ 12 ];\n\t\tarray[ offset + 13 ] = te[ 13 ];\n\t\tarray[ offset + 14 ] = te[ 14 ];\n\t\tarray[ offset + 15 ] = te[ 15 ];\n\n\t\treturn array;\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author WestLangley / http://github.com/WestLangley\n * @author bhouston / http://clara.io\n */\n\nvar _matrix = new Matrix4();\nvar _quaternion$1 = new Quaternion();\n\nfunction Euler( x, y, z, order ) {\n\n\tthis._x = x || 0;\n\tthis._y = y || 0;\n\tthis._z = z || 0;\n\tthis._order = order || Euler.DefaultOrder;\n\n}\n\nEuler.RotationOrders = [ 'XYZ', 'YZX', 'ZXY', 'XZY', 'YXZ', 'ZYX' ];\n\nEuler.DefaultOrder = 'XYZ';\n\nObject.defineProperties( Euler.prototype, {\n\n\tx: {\n\n\t\tget: function () {\n\n\t\t\treturn this._x;\n\n\t\t},\n\n\t\tset: function ( value ) {\n\n\t\t\tthis._x = value;\n\t\t\tthis._onChangeCallback();\n\n\t\t}\n\n\t},\n\n\ty: {\n\n\t\tget: function () {\n\n\t\t\treturn this._y;\n\n\t\t},\n\n\t\tset: function ( value ) {\n\n\t\t\tthis._y = value;\n\t\t\tthis._onChangeCallback();\n\n\t\t}\n\n\t},\n\n\tz: {\n\n\t\tget: function () {\n\n\t\t\treturn this._z;\n\n\t\t},\n\n\t\tset: function ( value ) {\n\n\t\t\tthis._z = value;\n\t\t\tthis._onChangeCallback();\n\n\t\t}\n\n\t},\n\n\torder: {\n\n\t\tget: function () {\n\n\t\t\treturn this._order;\n\n\t\t},\n\n\t\tset: function ( value ) {\n\n\t\t\tthis._order = value;\n\t\t\tthis._onChangeCallback();\n\n\t\t}\n\n\t}\n\n} );\n\nObject.assign( Euler.prototype, {\n\n\tisEuler: true,\n\n\tset: function ( x, y, z, order ) {\n\n\t\tthis._x = x;\n\t\tthis._y = y;\n\t\tthis._z = z;\n\t\tthis._order = order || this._order;\n\n\t\tthis._onChangeCallback();\n\n\t\treturn this;\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor( this._x, this._y, this._z, this._order );\n\n\t},\n\n\tcopy: function ( euler ) {\n\n\t\tthis._x = euler._x;\n\t\tthis._y = euler._y;\n\t\tthis._z = euler._z;\n\t\tthis._order = euler._order;\n\n\t\tthis._onChangeCallback();\n\n\t\treturn this;\n\n\t},\n\n\tsetFromRotationMatrix: function ( m, order, update ) {\n\n\t\tvar clamp = MathUtils.clamp;\n\n\t\t// assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)\n\n\t\tvar te = m.elements;\n\t\tvar m11 = te[ 0 ], m12 = te[ 4 ], m13 = te[ 8 ];\n\t\tvar m21 = te[ 1 ], m22 = te[ 5 ], m23 = te[ 9 ];\n\t\tvar m31 = te[ 2 ], m32 = te[ 6 ], m33 = te[ 10 ];\n\n\t\torder = order || this._order;\n\n\t\tif ( order === 'XYZ' ) {\n\n\t\t\tthis._y = Math.asin( clamp( m13, - 1, 1 ) );\n\n\t\t\tif ( Math.abs( m13 ) < 0.9999999 ) {\n\n\t\t\t\tthis._x = Math.atan2( - m23, m33 );\n\t\t\t\tthis._z = Math.atan2( - m12, m11 );\n\n\t\t\t} else {\n\n\t\t\t\tthis._x = Math.atan2( m32, m22 );\n\t\t\t\tthis._z = 0;\n\n\t\t\t}\n\n\t\t} else if ( order === 'YXZ' ) {\n\n\t\t\tthis._x = Math.asin( - clamp( m23, - 1, 1 ) );\n\n\t\t\tif ( Math.abs( m23 ) < 0.9999999 ) {\n\n\t\t\t\tthis._y = Math.atan2( m13, m33 );\n\t\t\t\tthis._z = Math.atan2( m21, m22 );\n\n\t\t\t} else {\n\n\t\t\t\tthis._y = Math.atan2( - m31, m11 );\n\t\t\t\tthis._z = 0;\n\n\t\t\t}\n\n\t\t} else if ( order === 'ZXY' ) {\n\n\t\t\tthis._x = Math.asin( clamp( m32, - 1, 1 ) );\n\n\t\t\tif ( Math.abs( m32 ) < 0.9999999 ) {\n\n\t\t\t\tthis._y = Math.atan2( - m31, m33 );\n\t\t\t\tthis._z = Math.atan2( - m12, m22 );\n\n\t\t\t} else {\n\n\t\t\t\tthis._y = 0;\n\t\t\t\tthis._z = Math.atan2( m21, m11 );\n\n\t\t\t}\n\n\t\t} else if ( order === 'ZYX' ) {\n\n\t\t\tthis._y = Math.asin( - clamp( m31, - 1, 1 ) );\n\n\t\t\tif ( Math.abs( m31 ) < 0.9999999 ) {\n\n\t\t\t\tthis._x = Math.atan2( m32, m33 );\n\t\t\t\tthis._z = Math.atan2( m21, m11 );\n\n\t\t\t} else {\n\n\t\t\t\tthis._x = 0;\n\t\t\t\tthis._z = Math.atan2( - m12, m22 );\n\n\t\t\t}\n\n\t\t} else if ( order === 'YZX' ) {\n\n\t\t\tthis._z = Math.asin( clamp( m21, - 1, 1 ) );\n\n\t\t\tif ( Math.abs( m21 ) < 0.9999999 ) {\n\n\t\t\t\tthis._x = Math.atan2( - m23, m22 );\n\t\t\t\tthis._y = Math.atan2( - m31, m11 );\n\n\t\t\t} else {\n\n\t\t\t\tthis._x = 0;\n\t\t\t\tthis._y = Math.atan2( m13, m33 );\n\n\t\t\t}\n\n\t\t} else if ( order === 'XZY' ) {\n\n\t\t\tthis._z = Math.asin( - clamp( m12, - 1, 1 ) );\n\n\t\t\tif ( Math.abs( m12 ) < 0.9999999 ) {\n\n\t\t\t\tthis._x = Math.atan2( m32, m22 );\n\t\t\t\tthis._y = Math.atan2( m13, m11 );\n\n\t\t\t} else {\n\n\t\t\t\tthis._x = Math.atan2( - m23, m33 );\n\t\t\t\tthis._y = 0;\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\tconsole.warn( 'THREE.Euler: .setFromRotationMatrix() given unsupported order: ' + order );\n\n\t\t}\n\n\t\tthis._order = order;\n\n\t\tif ( update !== false ) this._onChangeCallback();\n\n\t\treturn this;\n\n\t},\n\n\tsetFromQuaternion: function ( q, order, update ) {\n\n\t\t_matrix.makeRotationFromQuaternion( q );\n\n\t\treturn this.setFromRotationMatrix( _matrix, order, update );\n\n\t},\n\n\tsetFromVector3: function ( v, order ) {\n\n\t\treturn this.set( v.x, v.y, v.z, order || this._order );\n\n\t},\n\n\treorder: function ( newOrder ) {\n\n\t\t// WARNING: this discards revolution information -bhouston\n\n\t\t_quaternion$1.setFromEuler( this );\n\n\t\treturn this.setFromQuaternion( _quaternion$1, newOrder );\n\n\t},\n\n\tequals: function ( euler ) {\n\n\t\treturn ( euler._x === this._x ) && ( euler._y === this._y ) && ( euler._z === this._z ) && ( euler._order === this._order );\n\n\t},\n\n\tfromArray: function ( array ) {\n\n\t\tthis._x = array[ 0 ];\n\t\tthis._y = array[ 1 ];\n\t\tthis._z = array[ 2 ];\n\t\tif ( array[ 3 ] !== undefined ) this._order = array[ 3 ];\n\n\t\tthis._onChangeCallback();\n\n\t\treturn this;\n\n\t},\n\n\ttoArray: function ( array, offset ) {\n\n\t\tif ( array === undefined ) array = [];\n\t\tif ( offset === undefined ) offset = 0;\n\n\t\tarray[ offset ] = this._x;\n\t\tarray[ offset + 1 ] = this._y;\n\t\tarray[ offset + 2 ] = this._z;\n\t\tarray[ offset + 3 ] = this._order;\n\n\t\treturn array;\n\n\t},\n\n\ttoVector3: function ( optionalResult ) {\n\n\t\tif ( optionalResult ) {\n\n\t\t\treturn optionalResult.set( this._x, this._y, this._z );\n\n\t\t} else {\n\n\t\t\treturn new Vector3( this._x, this._y, this._z );\n\n\t\t}\n\n\t},\n\n\t_onChange: function ( callback ) {\n\n\t\tthis._onChangeCallback = callback;\n\n\t\treturn this;\n\n\t},\n\n\t_onChangeCallback: function () {}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction Layers() {\n\n\tthis.mask = 1 | 0;\n\n}\n\nObject.assign( Layers.prototype, {\n\n\tset: function ( channel ) {\n\n\t\tthis.mask = 1 << channel | 0;\n\n\t},\n\n\tenable: function ( channel ) {\n\n\t\tthis.mask |= 1 << channel | 0;\n\n\t},\n\n\tenableAll: function () {\n\n\t\tthis.mask = 0xffffffff | 0;\n\n\t},\n\n\ttoggle: function ( channel ) {\n\n\t\tthis.mask ^= 1 << channel | 0;\n\n\t},\n\n\tdisable: function ( channel ) {\n\n\t\tthis.mask &= ~ ( 1 << channel | 0 );\n\n\t},\n\n\tdisableAll: function () {\n\n\t\tthis.mask = 0;\n\n\t},\n\n\ttest: function ( layers ) {\n\n\t\treturn ( this.mask & layers.mask ) !== 0;\n\n\t}\n\n} );\n\nvar _object3DId = 0;\n\nvar _v1$1 = new Vector3();\nvar _q1 = new Quaternion();\nvar _m1$1 = new Matrix4();\nvar _target = new Vector3();\n\nvar _position = new Vector3();\nvar _scale = new Vector3();\nvar _quaternion$2 = new Quaternion();\n\nvar _xAxis = new Vector3( 1, 0, 0 );\nvar _yAxis = new Vector3( 0, 1, 0 );\nvar _zAxis = new Vector3( 0, 0, 1 );\n\nvar _addedEvent = { type: 'added' };\nvar _removedEvent = { type: 'removed' };\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author mikael emtinger / http://gomo.se/\n * @author alteredq / http://alteredqualia.com/\n * @author WestLangley / http://github.com/WestLangley\n * @author elephantatwork / www.elephantatwork.ch\n */\n\nfunction Object3D() {\n\n\tObject.defineProperty( this, 'id', { value: _object3DId ++ } );\n\n\tthis.uuid = MathUtils.generateUUID();\n\n\tthis.name = '';\n\tthis.type = 'Object3D';\n\n\tthis.parent = null;\n\tthis.children = [];\n\n\tthis.up = Object3D.DefaultUp.clone();\n\n\tvar position = new Vector3();\n\tvar rotation = new Euler();\n\tvar quaternion = new Quaternion();\n\tvar scale = new Vector3( 1, 1, 1 );\n\n\tfunction onRotationChange() {\n\n\t\tquaternion.setFromEuler( rotation, false );\n\n\t}\n\n\tfunction onQuaternionChange() {\n\n\t\trotation.setFromQuaternion( quaternion, undefined, false );\n\n\t}\n\n\trotation._onChange( onRotationChange );\n\tquaternion._onChange( onQuaternionChange );\n\n\tObject.defineProperties( this, {\n\t\tposition: {\n\t\t\tconfigurable: true,\n\t\t\tenumerable: true,\n\t\t\tvalue: position\n\t\t},\n\t\trotation: {\n\t\t\tconfigurable: true,\n\t\t\tenumerable: true,\n\t\t\tvalue: rotation\n\t\t},\n\t\tquaternion: {\n\t\t\tconfigurable: true,\n\t\t\tenumerable: true,\n\t\t\tvalue: quaternion\n\t\t},\n\t\tscale: {\n\t\t\tconfigurable: true,\n\t\t\tenumerable: true,\n\t\t\tvalue: scale\n\t\t},\n\t\tmodelViewMatrix: {\n\t\t\tvalue: new Matrix4()\n\t\t},\n\t\tnormalMatrix: {\n\t\t\tvalue: new Matrix3()\n\t\t}\n\t} );\n\n\tthis.matrix = new Matrix4();\n\tthis.matrixWorld = new Matrix4();\n\n\tthis.matrixAutoUpdate = Object3D.DefaultMatrixAutoUpdate;\n\tthis.matrixWorldNeedsUpdate = false;\n\n\tthis.layers = new Layers();\n\tthis.visible = true;\n\n\tthis.castShadow = false;\n\tthis.receiveShadow = false;\n\n\tthis.frustumCulled = true;\n\tthis.renderOrder = 0;\n\n\tthis.userData = {};\n\n}\n\nObject3D.DefaultUp = new Vector3( 0, 1, 0 );\nObject3D.DefaultMatrixAutoUpdate = true;\n\nObject3D.prototype = Object.assign( Object.create( EventDispatcher.prototype ), {\n\n\tconstructor: Object3D,\n\n\tisObject3D: true,\n\n\tonBeforeRender: function () {},\n\tonAfterRender: function () {},\n\n\tapplyMatrix4: function ( matrix ) {\n\n\t\tif ( this.matrixAutoUpdate ) this.updateMatrix();\n\n\t\tthis.matrix.premultiply( matrix );\n\n\t\tthis.matrix.decompose( this.position, this.quaternion, this.scale );\n\n\t},\n\n\tapplyQuaternion: function ( q ) {\n\n\t\tthis.quaternion.premultiply( q );\n\n\t\treturn this;\n\n\t},\n\n\tsetRotationFromAxisAngle: function ( axis, angle ) {\n\n\t\t// assumes axis is normalized\n\n\t\tthis.quaternion.setFromAxisAngle( axis, angle );\n\n\t},\n\n\tsetRotationFromEuler: function ( euler ) {\n\n\t\tthis.quaternion.setFromEuler( euler, true );\n\n\t},\n\n\tsetRotationFromMatrix: function ( m ) {\n\n\t\t// assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)\n\n\t\tthis.quaternion.setFromRotationMatrix( m );\n\n\t},\n\n\tsetRotationFromQuaternion: function ( q ) {\n\n\t\t// assumes q is normalized\n\n\t\tthis.quaternion.copy( q );\n\n\t},\n\n\trotateOnAxis: function ( axis, angle ) {\n\n\t\t// rotate object on axis in object space\n\t\t// axis is assumed to be normalized\n\n\t\t_q1.setFromAxisAngle( axis, angle );\n\n\t\tthis.quaternion.multiply( _q1 );\n\n\t\treturn this;\n\n\t},\n\n\trotateOnWorldAxis: function ( axis, angle ) {\n\n\t\t// rotate object on axis in world space\n\t\t// axis is assumed to be normalized\n\t\t// method assumes no rotated parent\n\n\t\t_q1.setFromAxisAngle( axis, angle );\n\n\t\tthis.quaternion.premultiply( _q1 );\n\n\t\treturn this;\n\n\t},\n\n\trotateX: function ( angle ) {\n\n\t\treturn this.rotateOnAxis( _xAxis, angle );\n\n\t},\n\n\trotateY: function ( angle ) {\n\n\t\treturn this.rotateOnAxis( _yAxis, angle );\n\n\t},\n\n\trotateZ: function ( angle ) {\n\n\t\treturn this.rotateOnAxis( _zAxis, angle );\n\n\t},\n\n\ttranslateOnAxis: function ( axis, distance ) {\n\n\t\t// translate object by distance along axis in object space\n\t\t// axis is assumed to be normalized\n\n\t\t_v1$1.copy( axis ).applyQuaternion( this.quaternion );\n\n\t\tthis.position.add( _v1$1.multiplyScalar( distance ) );\n\n\t\treturn this;\n\n\t},\n\n\ttranslateX: function ( distance ) {\n\n\t\treturn this.translateOnAxis( _xAxis, distance );\n\n\t},\n\n\ttranslateY: function ( distance ) {\n\n\t\treturn this.translateOnAxis( _yAxis, distance );\n\n\t},\n\n\ttranslateZ: function ( distance ) {\n\n\t\treturn this.translateOnAxis( _zAxis, distance );\n\n\t},\n\n\tlocalToWorld: function ( vector ) {\n\n\t\treturn vector.applyMatrix4( this.matrixWorld );\n\n\t},\n\n\tworldToLocal: function ( vector ) {\n\n\t\treturn vector.applyMatrix4( _m1$1.getInverse( this.matrixWorld ) );\n\n\t},\n\n\tlookAt: function ( x, y, z ) {\n\n\t\t// This method does not support objects having non-uniformly-scaled parent(s)\n\n\t\tif ( x.isVector3 ) {\n\n\t\t\t_target.copy( x );\n\n\t\t} else {\n\n\t\t\t_target.set( x, y, z );\n\n\t\t}\n\n\t\tvar parent = this.parent;\n\n\t\tthis.updateWorldMatrix( true, false );\n\n\t\t_position.setFromMatrixPosition( this.matrixWorld );\n\n\t\tif ( this.isCamera || this.isLight ) {\n\n\t\t\t_m1$1.lookAt( _position, _target, this.up );\n\n\t\t} else {\n\n\t\t\t_m1$1.lookAt( _target, _position, this.up );\n\n\t\t}\n\n\t\tthis.quaternion.setFromRotationMatrix( _m1$1 );\n\n\t\tif ( parent ) {\n\n\t\t\t_m1$1.extractRotation( parent.matrixWorld );\n\t\t\t_q1.setFromRotationMatrix( _m1$1 );\n\t\t\tthis.quaternion.premultiply( _q1.inverse() );\n\n\t\t}\n\n\t},\n\n\tadd: function ( object ) {\n\n\t\tif ( arguments.length > 1 ) {\n\n\t\t\tfor ( var i = 0; i < arguments.length; i ++ ) {\n\n\t\t\t\tthis.add( arguments[ i ] );\n\n\t\t\t}\n\n\t\t\treturn this;\n\n\t\t}\n\n\t\tif ( object === this ) {\n\n\t\t\tconsole.error( \"THREE.Object3D.add: object can't be added as a child of itself.\", object );\n\t\t\treturn this;\n\n\t\t}\n\n\t\tif ( ( object && object.isObject3D ) ) {\n\n\t\t\tif ( object.parent !== null ) {\n\n\t\t\t\tobject.parent.remove( object );\n\n\t\t\t}\n\n\t\t\tobject.parent = this;\n\t\t\tthis.children.push( object );\n\n\t\t\tobject.dispatchEvent( _addedEvent );\n\n\t\t} else {\n\n\t\t\tconsole.error( \"THREE.Object3D.add: object not an instance of THREE.Object3D.\", object );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tremove: function ( object ) {\n\n\t\tif ( arguments.length > 1 ) {\n\n\t\t\tfor ( var i = 0; i < arguments.length; i ++ ) {\n\n\t\t\t\tthis.remove( arguments[ i ] );\n\n\t\t\t}\n\n\t\t\treturn this;\n\n\t\t}\n\n\t\tvar index = this.children.indexOf( object );\n\n\t\tif ( index !== - 1 ) {\n\n\t\t\tobject.parent = null;\n\t\t\tthis.children.splice( index, 1 );\n\n\t\t\tobject.dispatchEvent( _removedEvent );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tattach: function ( object ) {\n\n\t\t// adds object as a child of this, while maintaining the object's world transform\n\n\t\tthis.updateWorldMatrix( true, false );\n\n\t\t_m1$1.getInverse( this.matrixWorld );\n\n\t\tif ( object.parent !== null ) {\n\n\t\t\tobject.parent.updateWorldMatrix( true, false );\n\n\t\t\t_m1$1.multiply( object.parent.matrixWorld );\n\n\t\t}\n\n\t\tobject.applyMatrix4( _m1$1 );\n\n\t\tobject.updateWorldMatrix( false, false );\n\n\t\tthis.add( object );\n\n\t\treturn this;\n\n\t},\n\n\tgetObjectById: function ( id ) {\n\n\t\treturn this.getObjectByProperty( 'id', id );\n\n\t},\n\n\tgetObjectByName: function ( name ) {\n\n\t\treturn this.getObjectByProperty( 'name', name );\n\n\t},\n\n\tgetObjectByProperty: function ( name, value ) {\n\n\t\tif ( this[ name ] === value ) return this;\n\n\t\tfor ( var i = 0, l = this.children.length; i < l; i ++ ) {\n\n\t\t\tvar child = this.children[ i ];\n\t\t\tvar object = child.getObjectByProperty( name, value );\n\n\t\t\tif ( object !== undefined ) {\n\n\t\t\t\treturn object;\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn undefined;\n\n\t},\n\n\tgetWorldPosition: function ( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Object3D: .getWorldPosition() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\tthis.updateMatrixWorld( true );\n\n\t\treturn target.setFromMatrixPosition( this.matrixWorld );\n\n\t},\n\n\tgetWorldQuaternion: function ( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Object3D: .getWorldQuaternion() target is now required' );\n\t\t\ttarget = new Quaternion();\n\n\t\t}\n\n\t\tthis.updateMatrixWorld( true );\n\n\t\tthis.matrixWorld.decompose( _position, target, _scale );\n\n\t\treturn target;\n\n\t},\n\n\tgetWorldScale: function ( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Object3D: .getWorldScale() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\tthis.updateMatrixWorld( true );\n\n\t\tthis.matrixWorld.decompose( _position, _quaternion$2, target );\n\n\t\treturn target;\n\n\t},\n\n\tgetWorldDirection: function ( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Object3D: .getWorldDirection() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\tthis.updateMatrixWorld( true );\n\n\t\tvar e = this.matrixWorld.elements;\n\n\t\treturn target.set( e[ 8 ], e[ 9 ], e[ 10 ] ).normalize();\n\n\t},\n\n\traycast: function () {},\n\n\ttraverse: function ( callback ) {\n\n\t\tcallback( this );\n\n\t\tvar children = this.children;\n\n\t\tfor ( var i = 0, l = children.length; i < l; i ++ ) {\n\n\t\t\tchildren[ i ].traverse( callback );\n\n\t\t}\n\n\t},\n\n\ttraverseVisible: function ( callback ) {\n\n\t\tif ( this.visible === false ) return;\n\n\t\tcallback( this );\n\n\t\tvar children = this.children;\n\n\t\tfor ( var i = 0, l = children.length; i < l; i ++ ) {\n\n\t\t\tchildren[ i ].traverseVisible( callback );\n\n\t\t}\n\n\t},\n\n\ttraverseAncestors: function ( callback ) {\n\n\t\tvar parent = this.parent;\n\n\t\tif ( parent !== null ) {\n\n\t\t\tcallback( parent );\n\n\t\t\tparent.traverseAncestors( callback );\n\n\t\t}\n\n\t},\n\n\tupdateMatrix: function () {\n\n\t\tthis.matrix.compose( this.position, this.quaternion, this.scale );\n\n\t\tthis.matrixWorldNeedsUpdate = true;\n\n\t},\n\n\tupdateMatrixWorld: function ( force ) {\n\n\t\tif ( this.matrixAutoUpdate ) this.updateMatrix();\n\n\t\tif ( this.matrixWorldNeedsUpdate || force ) {\n\n\t\t\tif ( this.parent === null ) {\n\n\t\t\t\tthis.matrixWorld.copy( this.matrix );\n\n\t\t\t} else {\n\n\t\t\t\tthis.matrixWorld.multiplyMatrices( this.parent.matrixWorld, this.matrix );\n\n\t\t\t}\n\n\t\t\tthis.matrixWorldNeedsUpdate = false;\n\n\t\t\tforce = true;\n\n\t\t}\n\n\t\t// update children\n\n\t\tvar children = this.children;\n\n\t\tfor ( var i = 0, l = children.length; i < l; i ++ ) {\n\n\t\t\tchildren[ i ].updateMatrixWorld( force );\n\n\t\t}\n\n\t},\n\n\tupdateWorldMatrix: function ( updateParents, updateChildren ) {\n\n\t\tvar parent = this.parent;\n\n\t\tif ( updateParents === true && parent !== null ) {\n\n\t\t\tparent.updateWorldMatrix( true, false );\n\n\t\t}\n\n\t\tif ( this.matrixAutoUpdate ) this.updateMatrix();\n\n\t\tif ( this.parent === null ) {\n\n\t\t\tthis.matrixWorld.copy( this.matrix );\n\n\t\t} else {\n\n\t\t\tthis.matrixWorld.multiplyMatrices( this.parent.matrixWorld, this.matrix );\n\n\t\t}\n\n\t\t// update children\n\n\t\tif ( updateChildren === true ) {\n\n\t\t\tvar children = this.children;\n\n\t\t\tfor ( var i = 0, l = children.length; i < l; i ++ ) {\n\n\t\t\t\tchildren[ i ].updateWorldMatrix( false, true );\n\n\t\t\t}\n\n\t\t}\n\n\t},\n\n\ttoJSON: function ( meta ) {\n\n\t\t// meta is a string when called from JSON.stringify\n\t\tvar isRootObject = ( meta === undefined || typeof meta === 'string' );\n\n\t\tvar output = {};\n\n\t\t// meta is a hash used to collect geometries, materials.\n\t\t// not providing it implies that this is the root object\n\t\t// being serialized.\n\t\tif ( isRootObject ) {\n\n\t\t\t// initialize meta obj\n\t\t\tmeta = {\n\t\t\t\tgeometries: {},\n\t\t\t\tmaterials: {},\n\t\t\t\ttextures: {},\n\t\t\t\timages: {},\n\t\t\t\tshapes: {}\n\t\t\t};\n\n\t\t\toutput.metadata = {\n\t\t\t\tversion: 4.5,\n\t\t\t\ttype: 'Object',\n\t\t\t\tgenerator: 'Object3D.toJSON'\n\t\t\t};\n\n\t\t}\n\n\t\t// standard Object3D serialization\n\n\t\tvar object = {};\n\n\t\tobject.uuid = this.uuid;\n\t\tobject.type = this.type;\n\n\t\tif ( this.name !== '' ) object.name = this.name;\n\t\tif ( this.castShadow === true ) object.castShadow = true;\n\t\tif ( this.receiveShadow === true ) object.receiveShadow = true;\n\t\tif ( this.visible === false ) object.visible = false;\n\t\tif ( this.frustumCulled === false ) object.frustumCulled = false;\n\t\tif ( this.renderOrder !== 0 ) object.renderOrder = this.renderOrder;\n\t\tif ( JSON.stringify( this.userData ) !== '{}' ) object.userData = this.userData;\n\n\t\tobject.layers = this.layers.mask;\n\t\tobject.matrix = this.matrix.toArray();\n\n\t\tif ( this.matrixAutoUpdate === false ) object.matrixAutoUpdate = false;\n\n\t\t// object specific properties\n\n\t\tif ( this.isInstancedMesh ) {\n\n\t\t\tobject.type = 'InstancedMesh';\n\t\t\tobject.count = this.count;\n\t\t\tobject.instanceMatrix = this.instanceMatrix.toJSON();\n\n\t\t}\n\n\t\t//\n\n\t\tfunction serialize( library, element ) {\n\n\t\t\tif ( library[ element.uuid ] === undefined ) {\n\n\t\t\t\tlibrary[ element.uuid ] = element.toJSON( meta );\n\n\t\t\t}\n\n\t\t\treturn element.uuid;\n\n\t\t}\n\n\t\tif ( this.isMesh || this.isLine || this.isPoints ) {\n\n\t\t\tobject.geometry = serialize( meta.geometries, this.geometry );\n\n\t\t\tvar parameters = this.geometry.parameters;\n\n\t\t\tif ( parameters !== undefined && parameters.shapes !== undefined ) {\n\n\t\t\t\tvar shapes = parameters.shapes;\n\n\t\t\t\tif ( Array.isArray( shapes ) ) {\n\n\t\t\t\t\tfor ( var i = 0, l = shapes.length; i < l; i ++ ) {\n\n\t\t\t\t\t\tvar shape = shapes[ i ];\n\n\t\t\t\t\t\tserialize( meta.shapes, shape );\n\n\t\t\t\t\t}\n\n\t\t\t\t} else {\n\n\t\t\t\t\tserialize( meta.shapes, shapes );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( this.material !== undefined ) {\n\n\t\t\tif ( Array.isArray( this.material ) ) {\n\n\t\t\t\tvar uuids = [];\n\n\t\t\t\tfor ( var i = 0, l = this.material.length; i < l; i ++ ) {\n\n\t\t\t\t\tuuids.push( serialize( meta.materials, this.material[ i ] ) );\n\n\t\t\t\t}\n\n\t\t\t\tobject.material = uuids;\n\n\t\t\t} else {\n\n\t\t\t\tobject.material = serialize( meta.materials, this.material );\n\n\t\t\t}\n\n\t\t}\n\n\t\t//\n\n\t\tif ( this.children.length > 0 ) {\n\n\t\t\tobject.children = [];\n\n\t\t\tfor ( var i = 0; i < this.children.length; i ++ ) {\n\n\t\t\t\tobject.children.push( this.children[ i ].toJSON( meta ).object );\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( isRootObject ) {\n\n\t\t\tvar geometries = extractFromCache( meta.geometries );\n\t\t\tvar materials = extractFromCache( meta.materials );\n\t\t\tvar textures = extractFromCache( meta.textures );\n\t\t\tvar images = extractFromCache( meta.images );\n\t\t\tvar shapes = extractFromCache( meta.shapes );\n\n\t\t\tif ( geometries.length > 0 ) output.geometries = geometries;\n\t\t\tif ( materials.length > 0 ) output.materials = materials;\n\t\t\tif ( textures.length > 0 ) output.textures = textures;\n\t\t\tif ( images.length > 0 ) output.images = images;\n\t\t\tif ( shapes.length > 0 ) output.shapes = shapes;\n\n\t\t}\n\n\t\toutput.object = object;\n\n\t\treturn output;\n\n\t\t// extract data from the cache hash\n\t\t// remove metadata on each item\n\t\t// and return as array\n\t\tfunction extractFromCache( cache ) {\n\n\t\t\tvar values = [];\n\t\t\tfor ( var key in cache ) {\n\n\t\t\t\tvar data = cache[ key ];\n\t\t\t\tdelete data.metadata;\n\t\t\t\tvalues.push( data );\n\n\t\t\t}\n\t\t\treturn values;\n\n\t\t}\n\n\t},\n\n\tclone: function ( recursive ) {\n\n\t\treturn new this.constructor().copy( this, recursive );\n\n\t},\n\n\tcopy: function ( source, recursive ) {\n\n\t\tif ( recursive === undefined ) recursive = true;\n\n\t\tthis.name = source.name;\n\n\t\tthis.up.copy( source.up );\n\n\t\tthis.position.copy( source.position );\n\t\tthis.quaternion.copy( source.quaternion );\n\t\tthis.scale.copy( source.scale );\n\n\t\tthis.matrix.copy( source.matrix );\n\t\tthis.matrixWorld.copy( source.matrixWorld );\n\n\t\tthis.matrixAutoUpdate = source.matrixAutoUpdate;\n\t\tthis.matrixWorldNeedsUpdate = source.matrixWorldNeedsUpdate;\n\n\t\tthis.layers.mask = source.layers.mask;\n\t\tthis.visible = source.visible;\n\n\t\tthis.castShadow = source.castShadow;\n\t\tthis.receiveShadow = source.receiveShadow;\n\n\t\tthis.frustumCulled = source.frustumCulled;\n\t\tthis.renderOrder = source.renderOrder;\n\n\t\tthis.userData = JSON.parse( JSON.stringify( source.userData ) );\n\n\t\tif ( recursive === true ) {\n\n\t\t\tfor ( var i = 0; i < source.children.length; i ++ ) {\n\n\t\t\t\tvar child = source.children[ i ];\n\t\t\t\tthis.add( child.clone() );\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction Scene() {\n\n\tObject3D.call( this );\n\n\tthis.type = 'Scene';\n\n\tthis.background = null;\n\tthis.environment = null;\n\tthis.fog = null;\n\n\tthis.overrideMaterial = null;\n\n\tthis.autoUpdate = true; // checked by the renderer\n\n\tif ( typeof __THREE_DEVTOOLS__ !== 'undefined' ) {\n\n\t\t__THREE_DEVTOOLS__.dispatchEvent( new CustomEvent( 'observe', { detail: this } ) ); // eslint-disable-line no-undef\n\n\t}\n\n}\n\nScene.prototype = Object.assign( Object.create( Object3D.prototype ), {\n\n\tconstructor: Scene,\n\n\tisScene: true,\n\n\tcopy: function ( source, recursive ) {\n\n\t\tObject3D.prototype.copy.call( this, source, recursive );\n\n\t\tif ( source.background !== null ) this.background = source.background.clone();\n\t\tif ( source.environment !== null ) this.environment = source.environment.clone();\n\t\tif ( source.fog !== null ) this.fog = source.fog.clone();\n\n\t\tif ( source.overrideMaterial !== null ) this.overrideMaterial = source.overrideMaterial.clone();\n\n\t\tthis.autoUpdate = source.autoUpdate;\n\t\tthis.matrixAutoUpdate = source.matrixAutoUpdate;\n\n\t\treturn this;\n\n\t},\n\n\ttoJSON: function ( meta ) {\n\n\t\tvar data = Object3D.prototype.toJSON.call( this, meta );\n\n\t\tif ( this.background !== null ) data.object.background = this.background.toJSON( meta );\n\t\tif ( this.environment !== null ) data.object.environment = this.environment.toJSON( meta );\n\t\tif ( this.fog !== null ) data.object.fog = this.fog.toJSON();\n\n\t\treturn data;\n\n\t},\n\n\tdispose: function () {\n\n\t\tthis.dispatchEvent( { type: 'dispose' } );\n\n\t}\n\n} );\n\nvar _points = [\n\tnew Vector3(),\n\tnew Vector3(),\n\tnew Vector3(),\n\tnew Vector3(),\n\tnew Vector3(),\n\tnew Vector3(),\n\tnew Vector3(),\n\tnew Vector3()\n];\n\nvar _vector$1 = new Vector3();\n\nvar _box = new Box3();\n\n// triangle centered vertices\n\nvar _v0 = new Vector3();\nvar _v1$2 = new Vector3();\nvar _v2 = new Vector3();\n\n// triangle edge vectors\n\nvar _f0 = new Vector3();\nvar _f1 = new Vector3();\nvar _f2 = new Vector3();\n\nvar _center = new Vector3();\nvar _extents = new Vector3();\nvar _triangleNormal = new Vector3();\nvar _testAxis = new Vector3();\n\n/**\n * @author bhouston / http://clara.io\n * @author WestLangley / http://github.com/WestLangley\n */\n\nfunction Box3( min, max ) {\n\n\tthis.min = ( min !== undefined ) ? min : new Vector3( + Infinity, + Infinity, + Infinity );\n\tthis.max = ( max !== undefined ) ? max : new Vector3( - Infinity, - Infinity, - Infinity );\n\n}\n\n\nObject.assign( Box3.prototype, {\n\n\tisBox3: true,\n\n\tset: function ( min, max ) {\n\n\t\tthis.min.copy( min );\n\t\tthis.max.copy( max );\n\n\t\treturn this;\n\n\t},\n\n\tsetFromArray: function ( array ) {\n\n\t\tvar minX = + Infinity;\n\t\tvar minY = + Infinity;\n\t\tvar minZ = + Infinity;\n\n\t\tvar maxX = - Infinity;\n\t\tvar maxY = - Infinity;\n\t\tvar maxZ = - Infinity;\n\n\t\tfor ( var i = 0, l = array.length; i < l; i += 3 ) {\n\n\t\t\tvar x = array[ i ];\n\t\t\tvar y = array[ i + 1 ];\n\t\t\tvar z = array[ i + 2 ];\n\n\t\t\tif ( x < minX ) minX = x;\n\t\t\tif ( y < minY ) minY = y;\n\t\t\tif ( z < minZ ) minZ = z;\n\n\t\t\tif ( x > maxX ) maxX = x;\n\t\t\tif ( y > maxY ) maxY = y;\n\t\t\tif ( z > maxZ ) maxZ = z;\n\n\t\t}\n\n\t\tthis.min.set( minX, minY, minZ );\n\t\tthis.max.set( maxX, maxY, maxZ );\n\n\t\treturn this;\n\n\t},\n\n\tsetFromBufferAttribute: function ( attribute ) {\n\n\t\tvar minX = + Infinity;\n\t\tvar minY = + Infinity;\n\t\tvar minZ = + Infinity;\n\n\t\tvar maxX = - Infinity;\n\t\tvar maxY = - Infinity;\n\t\tvar maxZ = - Infinity;\n\n\t\tfor ( var i = 0, l = attribute.count; i < l; i ++ ) {\n\n\t\t\tvar x = attribute.getX( i );\n\t\t\tvar y = attribute.getY( i );\n\t\t\tvar z = attribute.getZ( i );\n\n\t\t\tif ( x < minX ) minX = x;\n\t\t\tif ( y < minY ) minY = y;\n\t\t\tif ( z < minZ ) minZ = z;\n\n\t\t\tif ( x > maxX ) maxX = x;\n\t\t\tif ( y > maxY ) maxY = y;\n\t\t\tif ( z > maxZ ) maxZ = z;\n\n\t\t}\n\n\t\tthis.min.set( minX, minY, minZ );\n\t\tthis.max.set( maxX, maxY, maxZ );\n\n\t\treturn this;\n\n\t},\n\n\tsetFromPoints: function ( points ) {\n\n\t\tthis.makeEmpty();\n\n\t\tfor ( var i = 0, il = points.length; i < il; i ++ ) {\n\n\t\t\tthis.expandByPoint( points[ i ] );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tsetFromCenterAndSize: function ( center, size ) {\n\n\t\tvar halfSize = _vector$1.copy( size ).multiplyScalar( 0.5 );\n\n\t\tthis.min.copy( center ).sub( halfSize );\n\t\tthis.max.copy( center ).add( halfSize );\n\n\t\treturn this;\n\n\t},\n\n\tsetFromObject: function ( object ) {\n\n\t\tthis.makeEmpty();\n\n\t\treturn this.expandByObject( object );\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor().copy( this );\n\n\t},\n\n\tcopy: function ( box ) {\n\n\t\tthis.min.copy( box.min );\n\t\tthis.max.copy( box.max );\n\n\t\treturn this;\n\n\t},\n\n\tmakeEmpty: function () {\n\n\t\tthis.min.x = this.min.y = this.min.z = + Infinity;\n\t\tthis.max.x = this.max.y = this.max.z = - Infinity;\n\n\t\treturn this;\n\n\t},\n\n\tisEmpty: function () {\n\n\t\t// this is a more robust check for empty than ( volume <= 0 ) because volume can get positive with two negative axes\n\n\t\treturn ( this.max.x < this.min.x ) || ( this.max.y < this.min.y ) || ( this.max.z < this.min.z );\n\n\t},\n\n\tgetCenter: function ( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Box3: .getCenter() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\treturn this.isEmpty() ? target.set( 0, 0, 0 ) : target.addVectors( this.min, this.max ).multiplyScalar( 0.5 );\n\n\t},\n\n\tgetSize: function ( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Box3: .getSize() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\treturn this.isEmpty() ? target.set( 0, 0, 0 ) : target.subVectors( this.max, this.min );\n\n\t},\n\n\texpandByPoint: function ( point ) {\n\n\t\tthis.min.min( point );\n\t\tthis.max.max( point );\n\n\t\treturn this;\n\n\t},\n\n\texpandByVector: function ( vector ) {\n\n\t\tthis.min.sub( vector );\n\t\tthis.max.add( vector );\n\n\t\treturn this;\n\n\t},\n\n\texpandByScalar: function ( scalar ) {\n\n\t\tthis.min.addScalar( - scalar );\n\t\tthis.max.addScalar( scalar );\n\n\t\treturn this;\n\n\t},\n\n\texpandByObject: function ( object ) {\n\n\t\t// Computes the world-axis-aligned bounding box of an object (including its children),\n\t\t// accounting for both the object's, and children's, world transforms\n\n\t\tobject.updateWorldMatrix( false, false );\n\n\t\tvar geometry = object.geometry;\n\n\t\tif ( geometry !== undefined ) {\n\n\t\t\tif ( geometry.boundingBox === null ) {\n\n\t\t\t\tgeometry.computeBoundingBox();\n\n\t\t\t}\n\n\t\t\t_box.copy( geometry.boundingBox );\n\t\t\t_box.applyMatrix4( object.matrixWorld );\n\n\t\t\tthis.union( _box );\n\n\t\t}\n\n\t\tvar children = object.children;\n\n\t\tfor ( var i = 0, l = children.length; i < l; i ++ ) {\n\n\t\t\tthis.expandByObject( children[ i ] );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tcontainsPoint: function ( point ) {\n\n\t\treturn point.x < this.min.x || point.x > this.max.x ||\n\t\t\tpoint.y < this.min.y || point.y > this.max.y ||\n\t\t\tpoint.z < this.min.z || point.z > this.max.z ? false : true;\n\n\t},\n\n\tcontainsBox: function ( box ) {\n\n\t\treturn this.min.x <= box.min.x && box.max.x <= this.max.x &&\n\t\t\tthis.min.y <= box.min.y && box.max.y <= this.max.y &&\n\t\t\tthis.min.z <= box.min.z && box.max.z <= this.max.z;\n\n\t},\n\n\tgetParameter: function ( point, target ) {\n\n\t\t// This can potentially have a divide by zero if the box\n\t\t// has a size dimension of 0.\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Box3: .getParameter() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\treturn target.set(\n\t\t\t( point.x - this.min.x ) / ( this.max.x - this.min.x ),\n\t\t\t( point.y - this.min.y ) / ( this.max.y - this.min.y ),\n\t\t\t( point.z - this.min.z ) / ( this.max.z - this.min.z )\n\t\t);\n\n\t},\n\n\tintersectsBox: function ( box ) {\n\n\t\t// using 6 splitting planes to rule out intersections.\n\t\treturn box.max.x < this.min.x || box.min.x > this.max.x ||\n\t\t\tbox.max.y < this.min.y || box.min.y > this.max.y ||\n\t\t\tbox.max.z < this.min.z || box.min.z > this.max.z ? false : true;\n\n\t},\n\n\tintersectsSphere: function ( sphere ) {\n\n\t\t// Find the point on the AABB closest to the sphere center.\n\t\tthis.clampPoint( sphere.center, _vector$1 );\n\n\t\t// If that point is inside the sphere, the AABB and sphere intersect.\n\t\treturn _vector$1.distanceToSquared( sphere.center ) <= ( sphere.radius * sphere.radius );\n\n\t},\n\n\tintersectsPlane: function ( plane ) {\n\n\t\t// We compute the minimum and maximum dot product values. If those values\n\t\t// are on the same side (back or front) of the plane, then there is no intersection.\n\n\t\tvar min, max;\n\n\t\tif ( plane.normal.x > 0 ) {\n\n\t\t\tmin = plane.normal.x * this.min.x;\n\t\t\tmax = plane.normal.x * this.max.x;\n\n\t\t} else {\n\n\t\t\tmin = plane.normal.x * this.max.x;\n\t\t\tmax = plane.normal.x * this.min.x;\n\n\t\t}\n\n\t\tif ( plane.normal.y > 0 ) {\n\n\t\t\tmin += plane.normal.y * this.min.y;\n\t\t\tmax += plane.normal.y * this.max.y;\n\n\t\t} else {\n\n\t\t\tmin += plane.normal.y * this.max.y;\n\t\t\tmax += plane.normal.y * this.min.y;\n\n\t\t}\n\n\t\tif ( plane.normal.z > 0 ) {\n\n\t\t\tmin += plane.normal.z * this.min.z;\n\t\t\tmax += plane.normal.z * this.max.z;\n\n\t\t} else {\n\n\t\t\tmin += plane.normal.z * this.max.z;\n\t\t\tmax += plane.normal.z * this.min.z;\n\n\t\t}\n\n\t\treturn ( min <= - plane.constant && max >= - plane.constant );\n\n\t},\n\n\tintersectsTriangle: function ( triangle ) {\n\n\t\tif ( this.isEmpty() ) {\n\n\t\t\treturn false;\n\n\t\t}\n\n\t\t// compute box center and extents\n\t\tthis.getCenter( _center );\n\t\t_extents.subVectors( this.max, _center );\n\n\t\t// translate triangle to aabb origin\n\t\t_v0.subVectors( triangle.a, _center );\n\t\t_v1$2.subVectors( triangle.b, _center );\n\t\t_v2.subVectors( triangle.c, _center );\n\n\t\t// compute edge vectors for triangle\n\t\t_f0.subVectors( _v1$2, _v0 );\n\t\t_f1.subVectors( _v2, _v1$2 );\n\t\t_f2.subVectors( _v0, _v2 );\n\n\t\t// test against axes that are given by cross product combinations of the edges of the triangle and the edges of the aabb\n\t\t// make an axis testing of each of the 3 sides of the aabb against each of the 3 sides of the triangle = 9 axis of separation\n\t\t// axis_ij = u_i x f_j (u0, u1, u2 = face normals of aabb = x,y,z axes vectors since aabb is axis aligned)\n\t\tvar axes = [\n\t\t\t0, - _f0.z, _f0.y, 0, - _f1.z, _f1.y, 0, - _f2.z, _f2.y,\n\t\t\t_f0.z, 0, - _f0.x, _f1.z, 0, - _f1.x, _f2.z, 0, - _f2.x,\n\t\t\t- _f0.y, _f0.x, 0, - _f1.y, _f1.x, 0, - _f2.y, _f2.x, 0\n\t\t];\n\t\tif ( ! satForAxes( axes, _v0, _v1$2, _v2, _extents ) ) {\n\n\t\t\treturn false;\n\n\t\t}\n\n\t\t// test 3 face normals from the aabb\n\t\taxes = [ 1, 0, 0, 0, 1, 0, 0, 0, 1 ];\n\t\tif ( ! satForAxes( axes, _v0, _v1$2, _v2, _extents ) ) {\n\n\t\t\treturn false;\n\n\t\t}\n\n\t\t// finally testing the face normal of the triangle\n\t\t// use already existing triangle edge vectors here\n\t\t_triangleNormal.crossVectors( _f0, _f1 );\n\t\taxes = [ _triangleNormal.x, _triangleNormal.y, _triangleNormal.z ];\n\n\t\treturn satForAxes( axes, _v0, _v1$2, _v2, _extents );\n\n\t},\n\n\tclampPoint: function ( point, target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Box3: .clampPoint() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\treturn target.copy( point ).clamp( this.min, this.max );\n\n\t},\n\n\tdistanceToPoint: function ( point ) {\n\n\t\tvar clampedPoint = _vector$1.copy( point ).clamp( this.min, this.max );\n\n\t\treturn clampedPoint.sub( point ).length();\n\n\t},\n\n\tgetBoundingSphere: function ( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.error( 'THREE.Box3: .getBoundingSphere() target is now required' );\n\t\t\t//target = new Sphere(); // removed to avoid cyclic dependency\n\n\t\t}\n\n\t\tthis.getCenter( target.center );\n\n\t\ttarget.radius = this.getSize( _vector$1 ).length() * 0.5;\n\n\t\treturn target;\n\n\t},\n\n\tintersect: function ( box ) {\n\n\t\tthis.min.max( box.min );\n\t\tthis.max.min( box.max );\n\n\t\t// ensure that if there is no overlap, the result is fully empty, not slightly empty with non-inf/+inf values that will cause subsequence intersects to erroneously return valid values.\n\t\tif ( this.isEmpty() ) this.makeEmpty();\n\n\t\treturn this;\n\n\t},\n\n\tunion: function ( box ) {\n\n\t\tthis.min.min( box.min );\n\t\tthis.max.max( box.max );\n\n\t\treturn this;\n\n\t},\n\n\tapplyMatrix4: function ( matrix ) {\n\n\t\t// transform of empty box is an empty box.\n\t\tif ( this.isEmpty() ) return this;\n\n\t\t// NOTE: I am using a binary pattern to specify all 2^3 combinations below\n\t\t_points[ 0 ].set( this.min.x, this.min.y, this.min.z ).applyMatrix4( matrix ); // 000\n\t\t_points[ 1 ].set( this.min.x, this.min.y, this.max.z ).applyMatrix4( matrix ); // 001\n\t\t_points[ 2 ].set( this.min.x, this.max.y, this.min.z ).applyMatrix4( matrix ); // 010\n\t\t_points[ 3 ].set( this.min.x, this.max.y, this.max.z ).applyMatrix4( matrix ); // 011\n\t\t_points[ 4 ].set( this.max.x, this.min.y, this.min.z ).applyMatrix4( matrix ); // 100\n\t\t_points[ 5 ].set( this.max.x, this.min.y, this.max.z ).applyMatrix4( matrix ); // 101\n\t\t_points[ 6 ].set( this.max.x, this.max.y, this.min.z ).applyMatrix4( matrix ); // 110\n\t\t_points[ 7 ].set( this.max.x, this.max.y, this.max.z ).applyMatrix4( matrix ); // 111\n\n\t\tthis.setFromPoints( _points );\n\n\t\treturn this;\n\n\t},\n\n\ttranslate: function ( offset ) {\n\n\t\tthis.min.add( offset );\n\t\tthis.max.add( offset );\n\n\t\treturn this;\n\n\t},\n\n\tequals: function ( box ) {\n\n\t\treturn box.min.equals( this.min ) && box.max.equals( this.max );\n\n\t}\n\n} );\n\nfunction satForAxes( axes, v0, v1, v2, extents ) {\n\n\tvar i, j;\n\n\tfor ( i = 0, j = axes.length - 3; i <= j; i += 3 ) {\n\n\t\t_testAxis.fromArray( axes, i );\n\t\t// project the aabb onto the seperating axis\n\t\tvar r = extents.x * Math.abs( _testAxis.x ) + extents.y * Math.abs( _testAxis.y ) + extents.z * Math.abs( _testAxis.z );\n\t\t// project all 3 vertices of the triangle onto the seperating axis\n\t\tvar p0 = v0.dot( _testAxis );\n\t\tvar p1 = v1.dot( _testAxis );\n\t\tvar p2 = v2.dot( _testAxis );\n\t\t// actual test, basically see if either of the most extreme of the triangle points intersects r\n\t\tif ( Math.max( - Math.max( p0, p1, p2 ), Math.min( p0, p1, p2 ) ) > r ) {\n\n\t\t\t// points of the projected triangle are outside the projected half-length of the aabb\n\t\t\t// the axis is seperating and we can exit\n\t\t\treturn false;\n\n\t\t}\n\n\t}\n\n\treturn true;\n\n}\n\nvar _box$1 = new Box3();\n\n/**\n * @author bhouston / http://clara.io\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction Sphere( center, radius ) {\n\n\tthis.center = ( center !== undefined ) ? center : new Vector3();\n\tthis.radius = ( radius !== undefined ) ? radius : 0;\n\n}\n\nObject.assign( Sphere.prototype, {\n\n\tset: function ( center, radius ) {\n\n\t\tthis.center.copy( center );\n\t\tthis.radius = radius;\n\n\t\treturn this;\n\n\t},\n\n\tsetFromPoints: function ( points, optionalCenter ) {\n\n\t\tvar center = this.center;\n\n\t\tif ( optionalCenter !== undefined ) {\n\n\t\t\tcenter.copy( optionalCenter );\n\n\t\t} else {\n\n\t\t\t_box$1.setFromPoints( points ).getCenter( center );\n\n\t\t}\n\n\t\tvar maxRadiusSq = 0;\n\n\t\tfor ( var i = 0, il = points.length; i < il; i ++ ) {\n\n\t\t\tmaxRadiusSq = Math.max( maxRadiusSq, center.distanceToSquared( points[ i ] ) );\n\n\t\t}\n\n\t\tthis.radius = Math.sqrt( maxRadiusSq );\n\n\t\treturn this;\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor().copy( this );\n\n\t},\n\n\tcopy: function ( sphere ) {\n\n\t\tthis.center.copy( sphere.center );\n\t\tthis.radius = sphere.radius;\n\n\t\treturn this;\n\n\t},\n\n\tempty: function () {\n\n\t\treturn ( this.radius <= 0 );\n\n\t},\n\n\tcontainsPoint: function ( point ) {\n\n\t\treturn ( point.distanceToSquared( this.center ) <= ( this.radius * this.radius ) );\n\n\t},\n\n\tdistanceToPoint: function ( point ) {\n\n\t\treturn ( point.distanceTo( this.center ) - this.radius );\n\n\t},\n\n\tintersectsSphere: function ( sphere ) {\n\n\t\tvar radiusSum = this.radius + sphere.radius;\n\n\t\treturn sphere.center.distanceToSquared( this.center ) <= ( radiusSum * radiusSum );\n\n\t},\n\n\tintersectsBox: function ( box ) {\n\n\t\treturn box.intersectsSphere( this );\n\n\t},\n\n\tintersectsPlane: function ( plane ) {\n\n\t\treturn Math.abs( plane.distanceToPoint( this.center ) ) <= this.radius;\n\n\t},\n\n\tclampPoint: function ( point, target ) {\n\n\t\tvar deltaLengthSq = this.center.distanceToSquared( point );\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Sphere: .clampPoint() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\ttarget.copy( point );\n\n\t\tif ( deltaLengthSq > ( this.radius * this.radius ) ) {\n\n\t\t\ttarget.sub( this.center ).normalize();\n\t\t\ttarget.multiplyScalar( this.radius ).add( this.center );\n\n\t\t}\n\n\t\treturn target;\n\n\t},\n\n\tgetBoundingBox: function ( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Sphere: .getBoundingBox() target is now required' );\n\t\t\ttarget = new Box3();\n\n\t\t}\n\n\t\ttarget.set( this.center, this.center );\n\t\ttarget.expandByScalar( this.radius );\n\n\t\treturn target;\n\n\t},\n\n\tapplyMatrix4: function ( matrix ) {\n\n\t\tthis.center.applyMatrix4( matrix );\n\t\tthis.radius = this.radius * matrix.getMaxScaleOnAxis();\n\n\t\treturn this;\n\n\t},\n\n\ttranslate: function ( offset ) {\n\n\t\tthis.center.add( offset );\n\n\t\treturn this;\n\n\t},\n\n\tequals: function ( sphere ) {\n\n\t\treturn sphere.center.equals( this.center ) && ( sphere.radius === this.radius );\n\n\t}\n\n} );\n\nvar _vector$2 = new Vector3();\nvar _segCenter = new Vector3();\nvar _segDir = new Vector3();\nvar _diff = new Vector3();\n\nvar _edge1 = new Vector3();\nvar _edge2 = new Vector3();\nvar _normal = new Vector3();\n\n/**\n * @author bhouston / http://clara.io\n */\n\nfunction Ray( origin, direction ) {\n\n\tthis.origin = ( origin !== undefined ) ? origin : new Vector3();\n\tthis.direction = ( direction !== undefined ) ? direction : new Vector3( 0, 0, - 1 );\n\n}\n\nObject.assign( Ray.prototype, {\n\n\tset: function ( origin, direction ) {\n\n\t\tthis.origin.copy( origin );\n\t\tthis.direction.copy( direction );\n\n\t\treturn this;\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor().copy( this );\n\n\t},\n\n\tcopy: function ( ray ) {\n\n\t\tthis.origin.copy( ray.origin );\n\t\tthis.direction.copy( ray.direction );\n\n\t\treturn this;\n\n\t},\n\n\tat: function ( t, target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Ray: .at() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\treturn target.copy( this.direction ).multiplyScalar( t ).add( this.origin );\n\n\t},\n\n\tlookAt: function ( v ) {\n\n\t\tthis.direction.copy( v ).sub( this.origin ).normalize();\n\n\t\treturn this;\n\n\t},\n\n\trecast: function ( t ) {\n\n\t\tthis.origin.copy( this.at( t, _vector$2 ) );\n\n\t\treturn this;\n\n\t},\n\n\tclosestPointToPoint: function ( point, target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Ray: .closestPointToPoint() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\ttarget.subVectors( point, this.origin );\n\n\t\tvar directionDistance = target.dot( this.direction );\n\n\t\tif ( directionDistance < 0 ) {\n\n\t\t\treturn target.copy( this.origin );\n\n\t\t}\n\n\t\treturn target.copy( this.direction ).multiplyScalar( directionDistance ).add( this.origin );\n\n\t},\n\n\tdistanceToPoint: function ( point ) {\n\n\t\treturn Math.sqrt( this.distanceSqToPoint( point ) );\n\n\t},\n\n\tdistanceSqToPoint: function ( point ) {\n\n\t\tvar directionDistance = _vector$2.subVectors( point, this.origin ).dot( this.direction );\n\n\t\t// point behind the ray\n\n\t\tif ( directionDistance < 0 ) {\n\n\t\t\treturn this.origin.distanceToSquared( point );\n\n\t\t}\n\n\t\t_vector$2.copy( this.direction ).multiplyScalar( directionDistance ).add( this.origin );\n\n\t\treturn _vector$2.distanceToSquared( point );\n\n\t},\n\n\tdistanceSqToSegment: function ( v0, v1, optionalPointOnRay, optionalPointOnSegment ) {\n\n\t\t// from http://www.geometrictools.com/GTEngine/Include/Mathematics/GteDistRaySegment.h\n\t\t// It returns the min distance between the ray and the segment\n\t\t// defined by v0 and v1\n\t\t// It can also set two optional targets :\n\t\t// - The closest point on the ray\n\t\t// - The closest point on the segment\n\n\t\t_segCenter.copy( v0 ).add( v1 ).multiplyScalar( 0.5 );\n\t\t_segDir.copy( v1 ).sub( v0 ).normalize();\n\t\t_diff.copy( this.origin ).sub( _segCenter );\n\n\t\tvar segExtent = v0.distanceTo( v1 ) * 0.5;\n\t\tvar a01 = - this.direction.dot( _segDir );\n\t\tvar b0 = _diff.dot( this.direction );\n\t\tvar b1 = - _diff.dot( _segDir );\n\t\tvar c = _diff.lengthSq();\n\t\tvar det = Math.abs( 1 - a01 * a01 );\n\t\tvar s0, s1, sqrDist, extDet;\n\n\t\tif ( det > 0 ) {\n\n\t\t\t// The ray and segment are not parallel.\n\n\t\t\ts0 = a01 * b1 - b0;\n\t\t\ts1 = a01 * b0 - b1;\n\t\t\textDet = segExtent * det;\n\n\t\t\tif ( s0 >= 0 ) {\n\n\t\t\t\tif ( s1 >= - extDet ) {\n\n\t\t\t\t\tif ( s1 <= extDet ) {\n\n\t\t\t\t\t\t// region 0\n\t\t\t\t\t\t// Minimum at interior points of ray and segment.\n\n\t\t\t\t\t\tvar invDet = 1 / det;\n\t\t\t\t\t\ts0 *= invDet;\n\t\t\t\t\t\ts1 *= invDet;\n\t\t\t\t\t\tsqrDist = s0 * ( s0 + a01 * s1 + 2 * b0 ) + s1 * ( a01 * s0 + s1 + 2 * b1 ) + c;\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\t// region 1\n\n\t\t\t\t\t\ts1 = segExtent;\n\t\t\t\t\t\ts0 = Math.max( 0, - ( a01 * s1 + b0 ) );\n\t\t\t\t\t\tsqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;\n\n\t\t\t\t\t}\n\n\t\t\t\t} else {\n\n\t\t\t\t\t// region 5\n\n\t\t\t\t\ts1 = - segExtent;\n\t\t\t\t\ts0 = Math.max( 0, - ( a01 * s1 + b0 ) );\n\t\t\t\t\tsqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;\n\n\t\t\t\t}\n\n\t\t\t} else {\n\n\t\t\t\tif ( s1 <= - extDet ) {\n\n\t\t\t\t\t// region 4\n\n\t\t\t\t\ts0 = Math.max( 0, - ( - a01 * segExtent + b0 ) );\n\t\t\t\t\ts1 = ( s0 > 0 ) ? - segExtent : Math.min( Math.max( - segExtent, - b1 ), segExtent );\n\t\t\t\t\tsqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;\n\n\t\t\t\t} else if ( s1 <= extDet ) {\n\n\t\t\t\t\t// region 3\n\n\t\t\t\t\ts0 = 0;\n\t\t\t\t\ts1 = Math.min( Math.max( - segExtent, - b1 ), segExtent );\n\t\t\t\t\tsqrDist = s1 * ( s1 + 2 * b1 ) + c;\n\n\t\t\t\t} else {\n\n\t\t\t\t\t// region 2\n\n\t\t\t\t\ts0 = Math.max( 0, - ( a01 * segExtent + b0 ) );\n\t\t\t\t\ts1 = ( s0 > 0 ) ? segExtent : Math.min( Math.max( - segExtent, - b1 ), segExtent );\n\t\t\t\t\tsqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\t// Ray and segment are parallel.\n\n\t\t\ts1 = ( a01 > 0 ) ? - segExtent : segExtent;\n\t\t\ts0 = Math.max( 0, - ( a01 * s1 + b0 ) );\n\t\t\tsqrDist = - s0 * s0 + s1 * ( s1 + 2 * b1 ) + c;\n\n\t\t}\n\n\t\tif ( optionalPointOnRay ) {\n\n\t\t\toptionalPointOnRay.copy( this.direction ).multiplyScalar( s0 ).add( this.origin );\n\n\t\t}\n\n\t\tif ( optionalPointOnSegment ) {\n\n\t\t\toptionalPointOnSegment.copy( _segDir ).multiplyScalar( s1 ).add( _segCenter );\n\n\t\t}\n\n\t\treturn sqrDist;\n\n\t},\n\n\tintersectSphere: function ( sphere, target ) {\n\n\t\t_vector$2.subVectors( sphere.center, this.origin );\n\t\tvar tca = _vector$2.dot( this.direction );\n\t\tvar d2 = _vector$2.dot( _vector$2 ) - tca * tca;\n\t\tvar radius2 = sphere.radius * sphere.radius;\n\n\t\tif ( d2 > radius2 ) return null;\n\n\t\tvar thc = Math.sqrt( radius2 - d2 );\n\n\t\t// t0 = first intersect point - entrance on front of sphere\n\t\tvar t0 = tca - thc;\n\n\t\t// t1 = second intersect point - exit point on back of sphere\n\t\tvar t1 = tca + thc;\n\n\t\t// test to see if both t0 and t1 are behind the ray - if so, return null\n\t\tif ( t0 < 0 && t1 < 0 ) return null;\n\n\t\t// test to see if t0 is behind the ray:\n\t\t// if it is, the ray is inside the sphere, so return the second exit point scaled by t1,\n\t\t// in order to always return an intersect point that is in front of the ray.\n\t\tif ( t0 < 0 ) return this.at( t1, target );\n\n\t\t// else t0 is in front of the ray, so return the first collision point scaled by t0\n\t\treturn this.at( t0, target );\n\n\t},\n\n\tintersectsSphere: function ( sphere ) {\n\n\t\treturn this.distanceSqToPoint( sphere.center ) <= ( sphere.radius * sphere.radius );\n\n\t},\n\n\tdistanceToPlane: function ( plane ) {\n\n\t\tvar denominator = plane.normal.dot( this.direction );\n\n\t\tif ( denominator === 0 ) {\n\n\t\t\t// line is coplanar, return origin\n\t\t\tif ( plane.distanceToPoint( this.origin ) === 0 ) {\n\n\t\t\t\treturn 0;\n\n\t\t\t}\n\n\t\t\t// Null is preferable to undefined since undefined means.... it is undefined\n\n\t\t\treturn null;\n\n\t\t}\n\n\t\tvar t = - ( this.origin.dot( plane.normal ) + plane.constant ) / denominator;\n\n\t\t// Return if the ray never intersects the plane\n\n\t\treturn t >= 0 ? t : null;\n\n\t},\n\n\tintersectPlane: function ( plane, target ) {\n\n\t\tvar t = this.distanceToPlane( plane );\n\n\t\tif ( t === null ) {\n\n\t\t\treturn null;\n\n\t\t}\n\n\t\treturn this.at( t, target );\n\n\t},\n\n\tintersectsPlane: function ( plane ) {\n\n\t\t// check if the ray lies on the plane first\n\n\t\tvar distToPoint = plane.distanceToPoint( this.origin );\n\n\t\tif ( distToPoint === 0 ) {\n\n\t\t\treturn true;\n\n\t\t}\n\n\t\tvar denominator = plane.normal.dot( this.direction );\n\n\t\tif ( denominator * distToPoint < 0 ) {\n\n\t\t\treturn true;\n\n\t\t}\n\n\t\t// ray origin is behind the plane (and is pointing behind it)\n\n\t\treturn false;\n\n\t},\n\n\tintersectBox: function ( box, target ) {\n\n\t\tvar tmin, tmax, tymin, tymax, tzmin, tzmax;\n\n\t\tvar invdirx = 1 / this.direction.x,\n\t\t\tinvdiry = 1 / this.direction.y,\n\t\t\tinvdirz = 1 / this.direction.z;\n\n\t\tvar origin = this.origin;\n\n\t\tif ( invdirx >= 0 ) {\n\n\t\t\ttmin = ( box.min.x - origin.x ) * invdirx;\n\t\t\ttmax = ( box.max.x - origin.x ) * invdirx;\n\n\t\t} else {\n\n\t\t\ttmin = ( box.max.x - origin.x ) * invdirx;\n\t\t\ttmax = ( box.min.x - origin.x ) * invdirx;\n\n\t\t}\n\n\t\tif ( invdiry >= 0 ) {\n\n\t\t\ttymin = ( box.min.y - origin.y ) * invdiry;\n\t\t\ttymax = ( box.max.y - origin.y ) * invdiry;\n\n\t\t} else {\n\n\t\t\ttymin = ( box.max.y - origin.y ) * invdiry;\n\t\t\ttymax = ( box.min.y - origin.y ) * invdiry;\n\n\t\t}\n\n\t\tif ( ( tmin > tymax ) || ( tymin > tmax ) ) return null;\n\n\t\t// These lines also handle the case where tmin or tmax is NaN\n\t\t// (result of 0 * Infinity). x !== x returns true if x is NaN\n\n\t\tif ( tymin > tmin || tmin !== tmin ) tmin = tymin;\n\n\t\tif ( tymax < tmax || tmax !== tmax ) tmax = tymax;\n\n\t\tif ( invdirz >= 0 ) {\n\n\t\t\ttzmin = ( box.min.z - origin.z ) * invdirz;\n\t\t\ttzmax = ( box.max.z - origin.z ) * invdirz;\n\n\t\t} else {\n\n\t\t\ttzmin = ( box.max.z - origin.z ) * invdirz;\n\t\t\ttzmax = ( box.min.z - origin.z ) * invdirz;\n\n\t\t}\n\n\t\tif ( ( tmin > tzmax ) || ( tzmin > tmax ) ) return null;\n\n\t\tif ( tzmin > tmin || tmin !== tmin ) tmin = tzmin;\n\n\t\tif ( tzmax < tmax || tmax !== tmax ) tmax = tzmax;\n\n\t\t//return point closest to the ray (positive side)\n\n\t\tif ( tmax < 0 ) return null;\n\n\t\treturn this.at( tmin >= 0 ? tmin : tmax, target );\n\n\t},\n\n\tintersectsBox: function ( box ) {\n\n\t\treturn this.intersectBox( box, _vector$2 ) !== null;\n\n\t},\n\n\tintersectTriangle: function ( a, b, c, backfaceCulling, target ) {\n\n\t\t// Compute the offset origin, edges, and normal.\n\n\t\t// from http://www.geometrictools.com/GTEngine/Include/Mathematics/GteIntrRay3Triangle3.h\n\n\t\t_edge1.subVectors( b, a );\n\t\t_edge2.subVectors( c, a );\n\t\t_normal.crossVectors( _edge1, _edge2 );\n\n\t\t// Solve Q + t*D = b1*E1 + b2*E2 (Q = kDiff, D = ray direction,\n\t\t// E1 = kEdge1, E2 = kEdge2, N = Cross(E1,E2)) by\n\t\t//   |Dot(D,N)|*b1 = sign(Dot(D,N))*Dot(D,Cross(Q,E2))\n\t\t//   |Dot(D,N)|*b2 = sign(Dot(D,N))*Dot(D,Cross(E1,Q))\n\t\t//   |Dot(D,N)|*t = -sign(Dot(D,N))*Dot(Q,N)\n\t\tvar DdN = this.direction.dot( _normal );\n\t\tvar sign;\n\n\t\tif ( DdN > 0 ) {\n\n\t\t\tif ( backfaceCulling ) return null;\n\t\t\tsign = 1;\n\n\t\t} else if ( DdN < 0 ) {\n\n\t\t\tsign = - 1;\n\t\t\tDdN = - DdN;\n\n\t\t} else {\n\n\t\t\treturn null;\n\n\t\t}\n\n\t\t_diff.subVectors( this.origin, a );\n\t\tvar DdQxE2 = sign * this.direction.dot( _edge2.crossVectors( _diff, _edge2 ) );\n\n\t\t// b1 < 0, no intersection\n\t\tif ( DdQxE2 < 0 ) {\n\n\t\t\treturn null;\n\n\t\t}\n\n\t\tvar DdE1xQ = sign * this.direction.dot( _edge1.cross( _diff ) );\n\n\t\t// b2 < 0, no intersection\n\t\tif ( DdE1xQ < 0 ) {\n\n\t\t\treturn null;\n\n\t\t}\n\n\t\t// b1+b2 > 1, no intersection\n\t\tif ( DdQxE2 + DdE1xQ > DdN ) {\n\n\t\t\treturn null;\n\n\t\t}\n\n\t\t// Line intersects triangle, check if ray does.\n\t\tvar QdN = - sign * _diff.dot( _normal );\n\n\t\t// t < 0, no intersection\n\t\tif ( QdN < 0 ) {\n\n\t\t\treturn null;\n\n\t\t}\n\n\t\t// Ray intersects triangle.\n\t\treturn this.at( QdN / DdN, target );\n\n\t},\n\n\tapplyMatrix4: function ( matrix4 ) {\n\n\t\tthis.origin.applyMatrix4( matrix4 );\n\t\tthis.direction.transformDirection( matrix4 );\n\n\t\treturn this;\n\n\t},\n\n\tequals: function ( ray ) {\n\n\t\treturn ray.origin.equals( this.origin ) && ray.direction.equals( this.direction );\n\n\t}\n\n} );\n\n/**\n * @author bhouston / http://clara.io\n */\n\nvar _vector1 = new Vector3();\nvar _vector2 = new Vector3();\nvar _normalMatrix = new Matrix3();\n\nfunction Plane( normal, constant ) {\n\n\t// normal is assumed to be normalized\n\n\tthis.normal = ( normal !== undefined ) ? normal : new Vector3( 1, 0, 0 );\n\tthis.constant = ( constant !== undefined ) ? constant : 0;\n\n}\n\nObject.assign( Plane.prototype, {\n\n\tisPlane: true,\n\n\tset: function ( normal, constant ) {\n\n\t\tthis.normal.copy( normal );\n\t\tthis.constant = constant;\n\n\t\treturn this;\n\n\t},\n\n\tsetComponents: function ( x, y, z, w ) {\n\n\t\tthis.normal.set( x, y, z );\n\t\tthis.constant = w;\n\n\t\treturn this;\n\n\t},\n\n\tsetFromNormalAndCoplanarPoint: function ( normal, point ) {\n\n\t\tthis.normal.copy( normal );\n\t\tthis.constant = - point.dot( this.normal );\n\n\t\treturn this;\n\n\t},\n\n\tsetFromCoplanarPoints: function ( a, b, c ) {\n\n\t\tvar normal = _vector1.subVectors( c, b ).cross( _vector2.subVectors( a, b ) ).normalize();\n\n\t\t// Q: should an error be thrown if normal is zero (e.g. degenerate plane)?\n\n\t\tthis.setFromNormalAndCoplanarPoint( normal, a );\n\n\t\treturn this;\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor().copy( this );\n\n\t},\n\n\tcopy: function ( plane ) {\n\n\t\tthis.normal.copy( plane.normal );\n\t\tthis.constant = plane.constant;\n\n\t\treturn this;\n\n\t},\n\n\tnormalize: function () {\n\n\t\t// Note: will lead to a divide by zero if the plane is invalid.\n\n\t\tvar inverseNormalLength = 1.0 / this.normal.length();\n\t\tthis.normal.multiplyScalar( inverseNormalLength );\n\t\tthis.constant *= inverseNormalLength;\n\n\t\treturn this;\n\n\t},\n\n\tnegate: function () {\n\n\t\tthis.constant *= - 1;\n\t\tthis.normal.negate();\n\n\t\treturn this;\n\n\t},\n\n\tdistanceToPoint: function ( point ) {\n\n\t\treturn this.normal.dot( point ) + this.constant;\n\n\t},\n\n\tdistanceToSphere: function ( sphere ) {\n\n\t\treturn this.distanceToPoint( sphere.center ) - sphere.radius;\n\n\t},\n\n\tprojectPoint: function ( point, target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Plane: .projectPoint() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\treturn target.copy( this.normal ).multiplyScalar( - this.distanceToPoint( point ) ).add( point );\n\n\t},\n\n\tintersectLine: function ( line, target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Plane: .intersectLine() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\tvar direction = line.delta( _vector1 );\n\n\t\tvar denominator = this.normal.dot( direction );\n\n\t\tif ( denominator === 0 ) {\n\n\t\t\t// line is coplanar, return origin\n\t\t\tif ( this.distanceToPoint( line.start ) === 0 ) {\n\n\t\t\t\treturn target.copy( line.start );\n\n\t\t\t}\n\n\t\t\t// Unsure if this is the correct method to handle this case.\n\t\t\treturn undefined;\n\n\t\t}\n\n\t\tvar t = - ( line.start.dot( this.normal ) + this.constant ) / denominator;\n\n\t\tif ( t < 0 || t > 1 ) {\n\n\t\t\treturn undefined;\n\n\t\t}\n\n\t\treturn target.copy( direction ).multiplyScalar( t ).add( line.start );\n\n\t},\n\n\tintersectsLine: function ( line ) {\n\n\t\t// Note: this tests if a line intersects the plane, not whether it (or its end-points) are coplanar with it.\n\n\t\tvar startSign = this.distanceToPoint( line.start );\n\t\tvar endSign = this.distanceToPoint( line.end );\n\n\t\treturn ( startSign < 0 && endSign > 0 ) || ( endSign < 0 && startSign > 0 );\n\n\t},\n\n\tintersectsBox: function ( box ) {\n\n\t\treturn box.intersectsPlane( this );\n\n\t},\n\n\tintersectsSphere: function ( sphere ) {\n\n\t\treturn sphere.intersectsPlane( this );\n\n\t},\n\n\tcoplanarPoint: function ( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Plane: .coplanarPoint() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\treturn target.copy( this.normal ).multiplyScalar( - this.constant );\n\n\t},\n\n\tapplyMatrix4: function ( matrix, optionalNormalMatrix ) {\n\n\t\tvar normalMatrix = optionalNormalMatrix || _normalMatrix.getNormalMatrix( matrix );\n\n\t\tvar referencePoint = this.coplanarPoint( _vector1 ).applyMatrix4( matrix );\n\n\t\tvar normal = this.normal.applyMatrix3( normalMatrix ).normalize();\n\n\t\tthis.constant = - referencePoint.dot( normal );\n\n\t\treturn this;\n\n\t},\n\n\ttranslate: function ( offset ) {\n\n\t\tthis.constant -= offset.dot( this.normal );\n\n\t\treturn this;\n\n\t},\n\n\tequals: function ( plane ) {\n\n\t\treturn plane.normal.equals( this.normal ) && ( plane.constant === this.constant );\n\n\t}\n\n} );\n\n/**\n * @author bhouston / http://clara.io\n * @author mrdoob / http://mrdoob.com/\n */\n\nvar _v0$1 = new Vector3();\nvar _v1$3 = new Vector3();\nvar _v2$1 = new Vector3();\nvar _v3 = new Vector3();\n\nvar _vab = new Vector3();\nvar _vac = new Vector3();\nvar _vbc = new Vector3();\nvar _vap = new Vector3();\nvar _vbp = new Vector3();\nvar _vcp = new Vector3();\n\nfunction Triangle( a, b, c ) {\n\n\tthis.a = ( a !== undefined ) ? a : new Vector3();\n\tthis.b = ( b !== undefined ) ? b : new Vector3();\n\tthis.c = ( c !== undefined ) ? c : new Vector3();\n\n}\n\nObject.assign( Triangle, {\n\n\tgetNormal: function ( a, b, c, target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Triangle: .getNormal() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\ttarget.subVectors( c, b );\n\t\t_v0$1.subVectors( a, b );\n\t\ttarget.cross( _v0$1 );\n\n\t\tvar targetLengthSq = target.lengthSq();\n\t\tif ( targetLengthSq > 0 ) {\n\n\t\t\treturn target.multiplyScalar( 1 / Math.sqrt( targetLengthSq ) );\n\n\t\t}\n\n\t\treturn target.set( 0, 0, 0 );\n\n\t},\n\n\t// static/instance method to calculate barycentric coordinates\n\t// based on: http://www.blackpawn.com/texts/pointinpoly/default.html\n\tgetBarycoord: function ( point, a, b, c, target ) {\n\n\t\t_v0$1.subVectors( c, a );\n\t\t_v1$3.subVectors( b, a );\n\t\t_v2$1.subVectors( point, a );\n\n\t\tvar dot00 = _v0$1.dot( _v0$1 );\n\t\tvar dot01 = _v0$1.dot( _v1$3 );\n\t\tvar dot02 = _v0$1.dot( _v2$1 );\n\t\tvar dot11 = _v1$3.dot( _v1$3 );\n\t\tvar dot12 = _v1$3.dot( _v2$1 );\n\n\t\tvar denom = ( dot00 * dot11 - dot01 * dot01 );\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Triangle: .getBarycoord() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\t// collinear or singular triangle\n\t\tif ( denom === 0 ) {\n\n\t\t\t// arbitrary location outside of triangle?\n\t\t\t// not sure if this is the best idea, maybe should be returning undefined\n\t\t\treturn target.set( - 2, - 1, - 1 );\n\n\t\t}\n\n\t\tvar invDenom = 1 / denom;\n\t\tvar u = ( dot11 * dot02 - dot01 * dot12 ) * invDenom;\n\t\tvar v = ( dot00 * dot12 - dot01 * dot02 ) * invDenom;\n\n\t\t// barycentric coordinates must always sum to 1\n\t\treturn target.set( 1 - u - v, v, u );\n\n\t},\n\n\tcontainsPoint: function ( point, a, b, c ) {\n\n\t\tTriangle.getBarycoord( point, a, b, c, _v3 );\n\n\t\treturn ( _v3.x >= 0 ) && ( _v3.y >= 0 ) && ( ( _v3.x + _v3.y ) <= 1 );\n\n\t},\n\n\tgetUV: function ( point, p1, p2, p3, uv1, uv2, uv3, target ) {\n\n\t\tthis.getBarycoord( point, p1, p2, p3, _v3 );\n\n\t\ttarget.set( 0, 0 );\n\t\ttarget.addScaledVector( uv1, _v3.x );\n\t\ttarget.addScaledVector( uv2, _v3.y );\n\t\ttarget.addScaledVector( uv3, _v3.z );\n\n\t\treturn target;\n\n\t},\n\n\tisFrontFacing: function ( a, b, c, direction ) {\n\n\t\t_v0$1.subVectors( c, b );\n\t\t_v1$3.subVectors( a, b );\n\n\t\t// strictly front facing\n\t\treturn ( _v0$1.cross( _v1$3 ).dot( direction ) < 0 ) ? true : false;\n\n\t}\n\n} );\n\nObject.assign( Triangle.prototype, {\n\n\tset: function ( a, b, c ) {\n\n\t\tthis.a.copy( a );\n\t\tthis.b.copy( b );\n\t\tthis.c.copy( c );\n\n\t\treturn this;\n\n\t},\n\n\tsetFromPointsAndIndices: function ( points, i0, i1, i2 ) {\n\n\t\tthis.a.copy( points[ i0 ] );\n\t\tthis.b.copy( points[ i1 ] );\n\t\tthis.c.copy( points[ i2 ] );\n\n\t\treturn this;\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor().copy( this );\n\n\t},\n\n\tcopy: function ( triangle ) {\n\n\t\tthis.a.copy( triangle.a );\n\t\tthis.b.copy( triangle.b );\n\t\tthis.c.copy( triangle.c );\n\n\t\treturn this;\n\n\t},\n\n\tgetArea: function () {\n\n\t\t_v0$1.subVectors( this.c, this.b );\n\t\t_v1$3.subVectors( this.a, this.b );\n\n\t\treturn _v0$1.cross( _v1$3 ).length() * 0.5;\n\n\t},\n\n\tgetMidpoint: function ( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Triangle: .getMidpoint() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\treturn target.addVectors( this.a, this.b ).add( this.c ).multiplyScalar( 1 / 3 );\n\n\t},\n\n\tgetNormal: function ( target ) {\n\n\t\treturn Triangle.getNormal( this.a, this.b, this.c, target );\n\n\t},\n\n\tgetPlane: function ( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Triangle: .getPlane() target is now required' );\n\t\t\ttarget = new Plane();\n\n\t\t}\n\n\t\treturn target.setFromCoplanarPoints( this.a, this.b, this.c );\n\n\t},\n\n\tgetBarycoord: function ( point, target ) {\n\n\t\treturn Triangle.getBarycoord( point, this.a, this.b, this.c, target );\n\n\t},\n\n\tgetUV: function ( point, uv1, uv2, uv3, target ) {\n\n\t\treturn Triangle.getUV( point, this.a, this.b, this.c, uv1, uv2, uv3, target );\n\n\t},\n\n\tcontainsPoint: function ( point ) {\n\n\t\treturn Triangle.containsPoint( point, this.a, this.b, this.c );\n\n\t},\n\n\tisFrontFacing: function ( direction ) {\n\n\t\treturn Triangle.isFrontFacing( this.a, this.b, this.c, direction );\n\n\t},\n\n\tintersectsBox: function ( box ) {\n\n\t\treturn box.intersectsTriangle( this );\n\n\t},\n\n\tclosestPointToPoint: function ( p, target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Triangle: .closestPointToPoint() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\tvar a = this.a, b = this.b, c = this.c;\n\t\tvar v, w;\n\n\t\t// algorithm thanks to Real-Time Collision Detection by Christer Ericson,\n\t\t// published by Morgan Kaufmann Publishers, (c) 2005 Elsevier Inc.,\n\t\t// under the accompanying license; see chapter 5.1.5 for detailed explanation.\n\t\t// basically, we're distinguishing which of the voronoi regions of the triangle\n\t\t// the point lies in with the minimum amount of redundant computation.\n\n\t\t_vab.subVectors( b, a );\n\t\t_vac.subVectors( c, a );\n\t\t_vap.subVectors( p, a );\n\t\tvar d1 = _vab.dot( _vap );\n\t\tvar d2 = _vac.dot( _vap );\n\t\tif ( d1 <= 0 && d2 <= 0 ) {\n\n\t\t\t// vertex region of A; barycentric coords (1, 0, 0)\n\t\t\treturn target.copy( a );\n\n\t\t}\n\n\t\t_vbp.subVectors( p, b );\n\t\tvar d3 = _vab.dot( _vbp );\n\t\tvar d4 = _vac.dot( _vbp );\n\t\tif ( d3 >= 0 && d4 <= d3 ) {\n\n\t\t\t// vertex region of B; barycentric coords (0, 1, 0)\n\t\t\treturn target.copy( b );\n\n\t\t}\n\n\t\tvar vc = d1 * d4 - d3 * d2;\n\t\tif ( vc <= 0 && d1 >= 0 && d3 <= 0 ) {\n\n\t\t\tv = d1 / ( d1 - d3 );\n\t\t\t// edge region of AB; barycentric coords (1-v, v, 0)\n\t\t\treturn target.copy( a ).addScaledVector( _vab, v );\n\n\t\t}\n\n\t\t_vcp.subVectors( p, c );\n\t\tvar d5 = _vab.dot( _vcp );\n\t\tvar d6 = _vac.dot( _vcp );\n\t\tif ( d6 >= 0 && d5 <= d6 ) {\n\n\t\t\t// vertex region of C; barycentric coords (0, 0, 1)\n\t\t\treturn target.copy( c );\n\n\t\t}\n\n\t\tvar vb = d5 * d2 - d1 * d6;\n\t\tif ( vb <= 0 && d2 >= 0 && d6 <= 0 ) {\n\n\t\t\tw = d2 / ( d2 - d6 );\n\t\t\t// edge region of AC; barycentric coords (1-w, 0, w)\n\t\t\treturn target.copy( a ).addScaledVector( _vac, w );\n\n\t\t}\n\n\t\tvar va = d3 * d6 - d5 * d4;\n\t\tif ( va <= 0 && ( d4 - d3 ) >= 0 && ( d5 - d6 ) >= 0 ) {\n\n\t\t\t_vbc.subVectors( c, b );\n\t\t\tw = ( d4 - d3 ) / ( ( d4 - d3 ) + ( d5 - d6 ) );\n\t\t\t// edge region of BC; barycentric coords (0, 1-w, w)\n\t\t\treturn target.copy( b ).addScaledVector( _vbc, w ); // edge region of BC\n\n\t\t}\n\n\t\t// face region\n\t\tvar denom = 1 / ( va + vb + vc );\n\t\t// u = va * denom\n\t\tv = vb * denom;\n\t\tw = vc * denom;\n\n\t\treturn target.copy( a ).addScaledVector( _vab, v ).addScaledVector( _vac, w );\n\n\t},\n\n\tequals: function ( triangle ) {\n\n\t\treturn triangle.a.equals( this.a ) && triangle.b.equals( this.b ) && triangle.c.equals( this.c );\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nvar _colorKeywords = { 'aliceblue': 0xF0F8FF, 'antiquewhite': 0xFAEBD7, 'aqua': 0x00FFFF, 'aquamarine': 0x7FFFD4, 'azure': 0xF0FFFF,\n\t'beige': 0xF5F5DC, 'bisque': 0xFFE4C4, 'black': 0x000000, 'blanchedalmond': 0xFFEBCD, 'blue': 0x0000FF, 'blueviolet': 0x8A2BE2,\n\t'brown': 0xA52A2A, 'burlywood': 0xDEB887, 'cadetblue': 0x5F9EA0, 'chartreuse': 0x7FFF00, 'chocolate': 0xD2691E, 'coral': 0xFF7F50,\n\t'cornflowerblue': 0x6495ED, 'cornsilk': 0xFFF8DC, 'crimson': 0xDC143C, 'cyan': 0x00FFFF, 'darkblue': 0x00008B, 'darkcyan': 0x008B8B,\n\t'darkgoldenrod': 0xB8860B, 'darkgray': 0xA9A9A9, 'darkgreen': 0x006400, 'darkgrey': 0xA9A9A9, 'darkkhaki': 0xBDB76B, 'darkmagenta': 0x8B008B,\n\t'darkolivegreen': 0x556B2F, 'darkorange': 0xFF8C00, 'darkorchid': 0x9932CC, 'darkred': 0x8B0000, 'darksalmon': 0xE9967A, 'darkseagreen': 0x8FBC8F,\n\t'darkslateblue': 0x483D8B, 'darkslategray': 0x2F4F4F, 'darkslategrey': 0x2F4F4F, 'darkturquoise': 0x00CED1, 'darkviolet': 0x9400D3,\n\t'deeppink': 0xFF1493, 'deepskyblue': 0x00BFFF, 'dimgray': 0x696969, 'dimgrey': 0x696969, 'dodgerblue': 0x1E90FF, 'firebrick': 0xB22222,\n\t'floralwhite': 0xFFFAF0, 'forestgreen': 0x228B22, 'fuchsia': 0xFF00FF, 'gainsboro': 0xDCDCDC, 'ghostwhite': 0xF8F8FF, 'gold': 0xFFD700,\n\t'goldenrod': 0xDAA520, 'gray': 0x808080, 'green': 0x008000, 'greenyellow': 0xADFF2F, 'grey': 0x808080, 'honeydew': 0xF0FFF0, 'hotpink': 0xFF69B4,\n\t'indianred': 0xCD5C5C, 'indigo': 0x4B0082, 'ivory': 0xFFFFF0, 'khaki': 0xF0E68C, 'lavender': 0xE6E6FA, 'lavenderblush': 0xFFF0F5, 'lawngreen': 0x7CFC00,\n\t'lemonchiffon': 0xFFFACD, 'lightblue': 0xADD8E6, 'lightcoral': 0xF08080, 'lightcyan': 0xE0FFFF, 'lightgoldenrodyellow': 0xFAFAD2, 'lightgray': 0xD3D3D3,\n\t'lightgreen': 0x90EE90, 'lightgrey': 0xD3D3D3, 'lightpink': 0xFFB6C1, 'lightsalmon': 0xFFA07A, 'lightseagreen': 0x20B2AA, 'lightskyblue': 0x87CEFA,\n\t'lightslategray': 0x778899, 'lightslategrey': 0x778899, 'lightsteelblue': 0xB0C4DE, 'lightyellow': 0xFFFFE0, 'lime': 0x00FF00, 'limegreen': 0x32CD32,\n\t'linen': 0xFAF0E6, 'magenta': 0xFF00FF, 'maroon': 0x800000, 'mediumaquamarine': 0x66CDAA, 'mediumblue': 0x0000CD, 'mediumorchid': 0xBA55D3,\n\t'mediumpurple': 0x9370DB, 'mediumseagreen': 0x3CB371, 'mediumslateblue': 0x7B68EE, 'mediumspringgreen': 0x00FA9A, 'mediumturquoise': 0x48D1CC,\n\t'mediumvioletred': 0xC71585, 'midnightblue': 0x191970, 'mintcream': 0xF5FFFA, 'mistyrose': 0xFFE4E1, 'moccasin': 0xFFE4B5, 'navajowhite': 0xFFDEAD,\n\t'navy': 0x000080, 'oldlace': 0xFDF5E6, 'olive': 0x808000, 'olivedrab': 0x6B8E23, 'orange': 0xFFA500, 'orangered': 0xFF4500, 'orchid': 0xDA70D6,\n\t'palegoldenrod': 0xEEE8AA, 'palegreen': 0x98FB98, 'paleturquoise': 0xAFEEEE, 'palevioletred': 0xDB7093, 'papayawhip': 0xFFEFD5, 'peachpuff': 0xFFDAB9,\n\t'peru': 0xCD853F, 'pink': 0xFFC0CB, 'plum': 0xDDA0DD, 'powderblue': 0xB0E0E6, 'purple': 0x800080, 'rebeccapurple': 0x663399, 'red': 0xFF0000, 'rosybrown': 0xBC8F8F,\n\t'royalblue': 0x4169E1, 'saddlebrown': 0x8B4513, 'salmon': 0xFA8072, 'sandybrown': 0xF4A460, 'seagreen': 0x2E8B57, 'seashell': 0xFFF5EE,\n\t'sienna': 0xA0522D, 'silver': 0xC0C0C0, 'skyblue': 0x87CEEB, 'slateblue': 0x6A5ACD, 'slategray': 0x708090, 'slategrey': 0x708090, 'snow': 0xFFFAFA,\n\t'springgreen': 0x00FF7F, 'steelblue': 0x4682B4, 'tan': 0xD2B48C, 'teal': 0x008080, 'thistle': 0xD8BFD8, 'tomato': 0xFF6347, 'turquoise': 0x40E0D0,\n\t'violet': 0xEE82EE, 'wheat': 0xF5DEB3, 'white': 0xFFFFFF, 'whitesmoke': 0xF5F5F5, 'yellow': 0xFFFF00, 'yellowgreen': 0x9ACD32 };\n\nvar _hslA = { h: 0, s: 0, l: 0 };\nvar _hslB = { h: 0, s: 0, l: 0 };\n\nfunction Color( r, g, b ) {\n\n\tif ( g === undefined && b === undefined ) {\n\n\t\t// r is THREE.Color, hex or string\n\t\treturn this.set( r );\n\n\t}\n\n\treturn this.setRGB( r, g, b );\n\n}\n\nfunction hue2rgb( p, q, t ) {\n\n\tif ( t < 0 ) t += 1;\n\tif ( t > 1 ) t -= 1;\n\tif ( t < 1 / 6 ) return p + ( q - p ) * 6 * t;\n\tif ( t < 1 / 2 ) return q;\n\tif ( t < 2 / 3 ) return p + ( q - p ) * 6 * ( 2 / 3 - t );\n\treturn p;\n\n}\n\nfunction SRGBToLinear( c ) {\n\n\treturn ( c < 0.04045 ) ? c * 0.0773993808 : Math.pow( c * 0.9478672986 + 0.0521327014, 2.4 );\n\n}\n\nfunction LinearToSRGB( c ) {\n\n\treturn ( c < 0.0031308 ) ? c * 12.92 : 1.055 * ( Math.pow( c, 0.41666 ) ) - 0.055;\n\n}\n\nObject.assign( Color.prototype, {\n\n\tisColor: true,\n\n\tr: 1, g: 1, b: 1,\n\n\tset: function ( value ) {\n\n\t\tif ( value && value.isColor ) {\n\n\t\t\tthis.copy( value );\n\n\t\t} else if ( typeof value === 'number' ) {\n\n\t\t\tthis.setHex( value );\n\n\t\t} else if ( typeof value === 'string' ) {\n\n\t\t\tthis.setStyle( value );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tsetScalar: function ( scalar ) {\n\n\t\tthis.r = scalar;\n\t\tthis.g = scalar;\n\t\tthis.b = scalar;\n\n\t\treturn this;\n\n\t},\n\n\tsetHex: function ( hex ) {\n\n\t\thex = Math.floor( hex );\n\n\t\tthis.r = ( hex >> 16 & 255 ) / 255;\n\t\tthis.g = ( hex >> 8 & 255 ) / 255;\n\t\tthis.b = ( hex & 255 ) / 255;\n\n\t\treturn this;\n\n\t},\n\n\tsetRGB: function ( r, g, b ) {\n\n\t\tthis.r = r;\n\t\tthis.g = g;\n\t\tthis.b = b;\n\n\t\treturn this;\n\n\t},\n\n\tsetHSL: function ( h, s, l ) {\n\n\t\t// h,s,l ranges are in 0.0 - 1.0\n\t\th = MathUtils.euclideanModulo( h, 1 );\n\t\ts = MathUtils.clamp( s, 0, 1 );\n\t\tl = MathUtils.clamp( l, 0, 1 );\n\n\t\tif ( s === 0 ) {\n\n\t\t\tthis.r = this.g = this.b = l;\n\n\t\t} else {\n\n\t\t\tvar p = l <= 0.5 ? l * ( 1 + s ) : l + s - ( l * s );\n\t\t\tvar q = ( 2 * l ) - p;\n\n\t\t\tthis.r = hue2rgb( q, p, h + 1 / 3 );\n\t\t\tthis.g = hue2rgb( q, p, h );\n\t\t\tthis.b = hue2rgb( q, p, h - 1 / 3 );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tsetStyle: function ( style ) {\n\n\t\tfunction handleAlpha( string ) {\n\n\t\t\tif ( string === undefined ) return;\n\n\t\t\tif ( parseFloat( string ) < 1 ) {\n\n\t\t\t\tconsole.warn( 'THREE.Color: Alpha component of ' + style + ' will be ignored.' );\n\n\t\t\t}\n\n\t\t}\n\n\n\t\tvar m;\n\n\t\tif ( m = /^((?:rgb|hsl)a?)\\(\\s*([^\\)]*)\\)/.exec( style ) ) {\n\n\t\t\t// rgb / hsl\n\n\t\t\tvar color;\n\t\t\tvar name = m[ 1 ];\n\t\t\tvar components = m[ 2 ];\n\n\t\t\tswitch ( name ) {\n\n\t\t\t\tcase 'rgb':\n\t\t\t\tcase 'rgba':\n\n\t\t\t\t\tif ( color = /^(\\d+)\\s*,\\s*(\\d+)\\s*,\\s*(\\d+)\\s*(,\\s*([0-9]*\\.?[0-9]+)\\s*)?$/.exec( components ) ) {\n\n\t\t\t\t\t\t// rgb(255,0,0) rgba(255,0,0,0.5)\n\t\t\t\t\t\tthis.r = Math.min( 255, parseInt( color[ 1 ], 10 ) ) / 255;\n\t\t\t\t\t\tthis.g = Math.min( 255, parseInt( color[ 2 ], 10 ) ) / 255;\n\t\t\t\t\t\tthis.b = Math.min( 255, parseInt( color[ 3 ], 10 ) ) / 255;\n\n\t\t\t\t\t\thandleAlpha( color[ 5 ] );\n\n\t\t\t\t\t\treturn this;\n\n\t\t\t\t\t}\n\n\t\t\t\t\tif ( color = /^(\\d+)\\%\\s*,\\s*(\\d+)\\%\\s*,\\s*(\\d+)\\%\\s*(,\\s*([0-9]*\\.?[0-9]+)\\s*)?$/.exec( components ) ) {\n\n\t\t\t\t\t\t// rgb(100%,0%,0%) rgba(100%,0%,0%,0.5)\n\t\t\t\t\t\tthis.r = Math.min( 100, parseInt( color[ 1 ], 10 ) ) / 100;\n\t\t\t\t\t\tthis.g = Math.min( 100, parseInt( color[ 2 ], 10 ) ) / 100;\n\t\t\t\t\t\tthis.b = Math.min( 100, parseInt( color[ 3 ], 10 ) ) / 100;\n\n\t\t\t\t\t\thandleAlpha( color[ 5 ] );\n\n\t\t\t\t\t\treturn this;\n\n\t\t\t\t\t}\n\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase 'hsl':\n\t\t\t\tcase 'hsla':\n\n\t\t\t\t\tif ( color = /^([0-9]*\\.?[0-9]+)\\s*,\\s*(\\d+)\\%\\s*,\\s*(\\d+)\\%\\s*(,\\s*([0-9]*\\.?[0-9]+)\\s*)?$/.exec( components ) ) {\n\n\t\t\t\t\t\t// hsl(120,50%,50%) hsla(120,50%,50%,0.5)\n\t\t\t\t\t\tvar h = parseFloat( color[ 1 ] ) / 360;\n\t\t\t\t\t\tvar s = parseInt( color[ 2 ], 10 ) / 100;\n\t\t\t\t\t\tvar l = parseInt( color[ 3 ], 10 ) / 100;\n\n\t\t\t\t\t\thandleAlpha( color[ 5 ] );\n\n\t\t\t\t\t\treturn this.setHSL( h, s, l );\n\n\t\t\t\t\t}\n\n\t\t\t\t\tbreak;\n\n\t\t\t}\n\n\t\t} else if ( m = /^\\#([A-Fa-f0-9]+)$/.exec( style ) ) {\n\n\t\t\t// hex color\n\n\t\t\tvar hex = m[ 1 ];\n\t\t\tvar size = hex.length;\n\n\t\t\tif ( size === 3 ) {\n\n\t\t\t\t// #ff0\n\t\t\t\tthis.r = parseInt( hex.charAt( 0 ) + hex.charAt( 0 ), 16 ) / 255;\n\t\t\t\tthis.g = parseInt( hex.charAt( 1 ) + hex.charAt( 1 ), 16 ) / 255;\n\t\t\t\tthis.b = parseInt( hex.charAt( 2 ) + hex.charAt( 2 ), 16 ) / 255;\n\n\t\t\t\treturn this;\n\n\t\t\t} else if ( size === 6 ) {\n\n\t\t\t\t// #ff0000\n\t\t\t\tthis.r = parseInt( hex.charAt( 0 ) + hex.charAt( 1 ), 16 ) / 255;\n\t\t\t\tthis.g = parseInt( hex.charAt( 2 ) + hex.charAt( 3 ), 16 ) / 255;\n\t\t\t\tthis.b = parseInt( hex.charAt( 4 ) + hex.charAt( 5 ), 16 ) / 255;\n\n\t\t\t\treturn this;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( style && style.length > 0 ) {\n\n\t\t\treturn this.setColorName( style );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tsetColorName: function ( style ) {\n\n\t\t// color keywords\n\t\tvar hex = _colorKeywords[ style ];\n\n\t\tif ( hex !== undefined ) {\n\n\t\t\t// red\n\t\t\tthis.setHex( hex );\n\n\t\t} else {\n\n\t\t\t// unknown color\n\t\t\tconsole.warn( 'THREE.Color: Unknown color ' + style );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor( this.r, this.g, this.b );\n\n\t},\n\n\tcopy: function ( color ) {\n\n\t\tthis.r = color.r;\n\t\tthis.g = color.g;\n\t\tthis.b = color.b;\n\n\t\treturn this;\n\n\t},\n\n\tcopyGammaToLinear: function ( color, gammaFactor ) {\n\n\t\tif ( gammaFactor === undefined ) gammaFactor = 2.0;\n\n\t\tthis.r = Math.pow( color.r, gammaFactor );\n\t\tthis.g = Math.pow( color.g, gammaFactor );\n\t\tthis.b = Math.pow( color.b, gammaFactor );\n\n\t\treturn this;\n\n\t},\n\n\tcopyLinearToGamma: function ( color, gammaFactor ) {\n\n\t\tif ( gammaFactor === undefined ) gammaFactor = 2.0;\n\n\t\tvar safeInverse = ( gammaFactor > 0 ) ? ( 1.0 / gammaFactor ) : 1.0;\n\n\t\tthis.r = Math.pow( color.r, safeInverse );\n\t\tthis.g = Math.pow( color.g, safeInverse );\n\t\tthis.b = Math.pow( color.b, safeInverse );\n\n\t\treturn this;\n\n\t},\n\n\tconvertGammaToLinear: function ( gammaFactor ) {\n\n\t\tthis.copyGammaToLinear( this, gammaFactor );\n\n\t\treturn this;\n\n\t},\n\n\tconvertLinearToGamma: function ( gammaFactor ) {\n\n\t\tthis.copyLinearToGamma( this, gammaFactor );\n\n\t\treturn this;\n\n\t},\n\n\tcopySRGBToLinear: function ( color ) {\n\n\t\tthis.r = SRGBToLinear( color.r );\n\t\tthis.g = SRGBToLinear( color.g );\n\t\tthis.b = SRGBToLinear( color.b );\n\n\t\treturn this;\n\n\t},\n\n\tcopyLinearToSRGB: function ( color ) {\n\n\t\tthis.r = LinearToSRGB( color.r );\n\t\tthis.g = LinearToSRGB( color.g );\n\t\tthis.b = LinearToSRGB( color.b );\n\n\t\treturn this;\n\n\t},\n\n\tconvertSRGBToLinear: function () {\n\n\t\tthis.copySRGBToLinear( this );\n\n\t\treturn this;\n\n\t},\n\n\tconvertLinearToSRGB: function () {\n\n\t\tthis.copyLinearToSRGB( this );\n\n\t\treturn this;\n\n\t},\n\n\tgetHex: function () {\n\n\t\treturn ( this.r * 255 ) << 16 ^ ( this.g * 255 ) << 8 ^ ( this.b * 255 ) << 0;\n\n\t},\n\n\tgetHexString: function () {\n\n\t\treturn ( '000000' + this.getHex().toString( 16 ) ).slice( - 6 );\n\n\t},\n\n\tgetHSL: function ( target ) {\n\n\t\t// h,s,l ranges are in 0.0 - 1.0\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Color: .getHSL() target is now required' );\n\t\t\ttarget = { h: 0, s: 0, l: 0 };\n\n\t\t}\n\n\t\tvar r = this.r, g = this.g, b = this.b;\n\n\t\tvar max = Math.max( r, g, b );\n\t\tvar min = Math.min( r, g, b );\n\n\t\tvar hue, saturation;\n\t\tvar lightness = ( min + max ) / 2.0;\n\n\t\tif ( min === max ) {\n\n\t\t\thue = 0;\n\t\t\tsaturation = 0;\n\n\t\t} else {\n\n\t\t\tvar delta = max - min;\n\n\t\t\tsaturation = lightness <= 0.5 ? delta / ( max + min ) : delta / ( 2 - max - min );\n\n\t\t\tswitch ( max ) {\n\n\t\t\t\tcase r: hue = ( g - b ) / delta + ( g < b ? 6 : 0 ); break;\n\t\t\t\tcase g: hue = ( b - r ) / delta + 2; break;\n\t\t\t\tcase b: hue = ( r - g ) / delta + 4; break;\n\n\t\t\t}\n\n\t\t\thue /= 6;\n\n\t\t}\n\n\t\ttarget.h = hue;\n\t\ttarget.s = saturation;\n\t\ttarget.l = lightness;\n\n\t\treturn target;\n\n\t},\n\n\tgetStyle: function () {\n\n\t\treturn 'rgb(' + ( ( this.r * 255 ) | 0 ) + ',' + ( ( this.g * 255 ) | 0 ) + ',' + ( ( this.b * 255 ) | 0 ) + ')';\n\n\t},\n\n\toffsetHSL: function ( h, s, l ) {\n\n\t\tthis.getHSL( _hslA );\n\n\t\t_hslA.h += h; _hslA.s += s; _hslA.l += l;\n\n\t\tthis.setHSL( _hslA.h, _hslA.s, _hslA.l );\n\n\t\treturn this;\n\n\t},\n\n\tadd: function ( color ) {\n\n\t\tthis.r += color.r;\n\t\tthis.g += color.g;\n\t\tthis.b += color.b;\n\n\t\treturn this;\n\n\t},\n\n\taddColors: function ( color1, color2 ) {\n\n\t\tthis.r = color1.r + color2.r;\n\t\tthis.g = color1.g + color2.g;\n\t\tthis.b = color1.b + color2.b;\n\n\t\treturn this;\n\n\t},\n\n\taddScalar: function ( s ) {\n\n\t\tthis.r += s;\n\t\tthis.g += s;\n\t\tthis.b += s;\n\n\t\treturn this;\n\n\t},\n\n\tsub: function ( color ) {\n\n\t\tthis.r = Math.max( 0, this.r - color.r );\n\t\tthis.g = Math.max( 0, this.g - color.g );\n\t\tthis.b = Math.max( 0, this.b - color.b );\n\n\t\treturn this;\n\n\t},\n\n\tmultiply: function ( color ) {\n\n\t\tthis.r *= color.r;\n\t\tthis.g *= color.g;\n\t\tthis.b *= color.b;\n\n\t\treturn this;\n\n\t},\n\n\tmultiplyScalar: function ( s ) {\n\n\t\tthis.r *= s;\n\t\tthis.g *= s;\n\t\tthis.b *= s;\n\n\t\treturn this;\n\n\t},\n\n\tlerp: function ( color, alpha ) {\n\n\t\tthis.r += ( color.r - this.r ) * alpha;\n\t\tthis.g += ( color.g - this.g ) * alpha;\n\t\tthis.b += ( color.b - this.b ) * alpha;\n\n\t\treturn this;\n\n\t},\n\n\tlerpHSL: function ( color, alpha ) {\n\n\t\tthis.getHSL( _hslA );\n\t\tcolor.getHSL( _hslB );\n\n\t\tvar h = MathUtils.lerp( _hslA.h, _hslB.h, alpha );\n\t\tvar s = MathUtils.lerp( _hslA.s, _hslB.s, alpha );\n\t\tvar l = MathUtils.lerp( _hslA.l, _hslB.l, alpha );\n\n\t\tthis.setHSL( h, s, l );\n\n\t\treturn this;\n\n\t},\n\n\tequals: function ( c ) {\n\n\t\treturn ( c.r === this.r ) && ( c.g === this.g ) && ( c.b === this.b );\n\n\t},\n\n\tfromArray: function ( array, offset ) {\n\n\t\tif ( offset === undefined ) offset = 0;\n\n\t\tthis.r = array[ offset ];\n\t\tthis.g = array[ offset + 1 ];\n\t\tthis.b = array[ offset + 2 ];\n\n\t\treturn this;\n\n\t},\n\n\ttoArray: function ( array, offset ) {\n\n\t\tif ( array === undefined ) array = [];\n\t\tif ( offset === undefined ) offset = 0;\n\n\t\tarray[ offset ] = this.r;\n\t\tarray[ offset + 1 ] = this.g;\n\t\tarray[ offset + 2 ] = this.b;\n\n\t\treturn array;\n\n\t},\n\n\ttoJSON: function () {\n\n\t\treturn this.getHex();\n\n\t}\n\n} );\n\nColor.NAMES = _colorKeywords;\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n */\n\nfunction Face3( a, b, c, normal, color, materialIndex ) {\n\n\tthis.a = a;\n\tthis.b = b;\n\tthis.c = c;\n\n\tthis.normal = ( normal && normal.isVector3 ) ? normal : new Vector3();\n\tthis.vertexNormals = Array.isArray( normal ) ? normal : [];\n\n\tthis.color = ( color && color.isColor ) ? color : new Color();\n\tthis.vertexColors = Array.isArray( color ) ? color : [];\n\n\tthis.materialIndex = materialIndex !== undefined ? materialIndex : 0;\n\n}\n\nObject.assign( Face3.prototype, {\n\n\tclone: function () {\n\n\t\treturn new this.constructor().copy( this );\n\n\t},\n\n\tcopy: function ( source ) {\n\n\t\tthis.a = source.a;\n\t\tthis.b = source.b;\n\t\tthis.c = source.c;\n\n\t\tthis.normal.copy( source.normal );\n\t\tthis.color.copy( source.color );\n\n\t\tthis.materialIndex = source.materialIndex;\n\n\t\tfor ( var i = 0, il = source.vertexNormals.length; i < il; i ++ ) {\n\n\t\t\tthis.vertexNormals[ i ] = source.vertexNormals[ i ].clone();\n\n\t\t}\n\n\t\tfor ( var i = 0, il = source.vertexColors.length; i < il; i ++ ) {\n\n\t\t\tthis.vertexColors[ i ] = source.vertexColors[ i ].clone();\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n */\n\nvar materialId = 0;\n\nfunction Material() {\n\n\tObject.defineProperty( this, 'id', { value: materialId ++ } );\n\n\tthis.uuid = MathUtils.generateUUID();\n\n\tthis.name = '';\n\tthis.type = 'Material';\n\n\tthis.fog = true;\n\n\tthis.blending = NormalBlending;\n\tthis.side = FrontSide;\n\tthis.flatShading = false;\n\tthis.vertexColors = false;\n\n\tthis.opacity = 1;\n\tthis.transparent = false;\n\n\tthis.blendSrc = SrcAlphaFactor;\n\tthis.blendDst = OneMinusSrcAlphaFactor;\n\tthis.blendEquation = AddEquation;\n\tthis.blendSrcAlpha = null;\n\tthis.blendDstAlpha = null;\n\tthis.blendEquationAlpha = null;\n\n\tthis.depthFunc = LessEqualDepth;\n\tthis.depthTest = true;\n\tthis.depthWrite = true;\n\n\tthis.stencilWriteMask = 0xff;\n\tthis.stencilFunc = AlwaysStencilFunc;\n\tthis.stencilRef = 0;\n\tthis.stencilFuncMask = 0xff;\n\tthis.stencilFail = KeepStencilOp;\n\tthis.stencilZFail = KeepStencilOp;\n\tthis.stencilZPass = KeepStencilOp;\n\tthis.stencilWrite = false;\n\n\tthis.clippingPlanes = null;\n\tthis.clipIntersection = false;\n\tthis.clipShadows = false;\n\n\tthis.shadowSide = null;\n\n\tthis.colorWrite = true;\n\n\tthis.precision = null; // override the renderer's default precision for this material\n\n\tthis.polygonOffset = false;\n\tthis.polygonOffsetFactor = 0;\n\tthis.polygonOffsetUnits = 0;\n\n\tthis.dithering = false;\n\n\tthis.alphaTest = 0;\n\tthis.premultipliedAlpha = false;\n\n\tthis.visible = true;\n\n\tthis.toneMapped = true;\n\n\tthis.userData = {};\n\n\tthis.version = 0;\n\n}\n\nMaterial.prototype = Object.assign( Object.create( EventDispatcher.prototype ), {\n\n\tconstructor: Material,\n\n\tisMaterial: true,\n\n\tonBeforeCompile: function () {},\n\n\tsetValues: function ( values ) {\n\n\t\tif ( values === undefined ) return;\n\n\t\tfor ( var key in values ) {\n\n\t\t\tvar newValue = values[ key ];\n\n\t\t\tif ( newValue === undefined ) {\n\n\t\t\t\tconsole.warn( \"THREE.Material: '\" + key + \"' parameter is undefined.\" );\n\t\t\t\tcontinue;\n\n\t\t\t}\n\n\t\t\t// for backward compatability if shading is set in the constructor\n\t\t\tif ( key === 'shading' ) {\n\n\t\t\t\tconsole.warn( 'THREE.' + this.type + ': .shading has been removed. Use the boolean .flatShading instead.' );\n\t\t\t\tthis.flatShading = ( newValue === FlatShading ) ? true : false;\n\t\t\t\tcontinue;\n\n\t\t\t}\n\n\t\t\tvar currentValue = this[ key ];\n\n\t\t\tif ( currentValue === undefined ) {\n\n\t\t\t\tconsole.warn( \"THREE.\" + this.type + \": '\" + key + \"' is not a property of this material.\" );\n\t\t\t\tcontinue;\n\n\t\t\t}\n\n\t\t\tif ( currentValue && currentValue.isColor ) {\n\n\t\t\t\tcurrentValue.set( newValue );\n\n\t\t\t} else if ( ( currentValue && currentValue.isVector3 ) && ( newValue && newValue.isVector3 ) ) {\n\n\t\t\t\tcurrentValue.copy( newValue );\n\n\t\t\t} else {\n\n\t\t\t\tthis[ key ] = newValue;\n\n\t\t\t}\n\n\t\t}\n\n\t},\n\n\ttoJSON: function ( meta ) {\n\n\t\tvar isRoot = ( meta === undefined || typeof meta === 'string' );\n\n\t\tif ( isRoot ) {\n\n\t\t\tmeta = {\n\t\t\t\ttextures: {},\n\t\t\t\timages: {}\n\t\t\t};\n\n\t\t}\n\n\t\tvar data = {\n\t\t\tmetadata: {\n\t\t\t\tversion: 4.5,\n\t\t\t\ttype: 'Material',\n\t\t\t\tgenerator: 'Material.toJSON'\n\t\t\t}\n\t\t};\n\n\t\t// standard Material serialization\n\t\tdata.uuid = this.uuid;\n\t\tdata.type = this.type;\n\n\t\tif ( this.name !== '' ) data.name = this.name;\n\n\t\tif ( this.color && this.color.isColor ) data.color = this.color.getHex();\n\n\t\tif ( this.roughness !== undefined ) data.roughness = this.roughness;\n\t\tif ( this.metalness !== undefined ) data.metalness = this.metalness;\n\n\t\tif ( this.sheen && this.sheen.isColor ) data.sheen = this.sheen.getHex();\n\t\tif ( this.emissive && this.emissive.isColor ) data.emissive = this.emissive.getHex();\n\t\tif ( this.emissiveIntensity && this.emissiveIntensity !== 1 ) data.emissiveIntensity = this.emissiveIntensity;\n\n\t\tif ( this.specular && this.specular.isColor ) data.specular = this.specular.getHex();\n\t\tif ( this.shininess !== undefined ) data.shininess = this.shininess;\n\t\tif ( this.clearcoat !== undefined ) data.clearcoat = this.clearcoat;\n\t\tif ( this.clearcoatRoughness !== undefined ) data.clearcoatRoughness = this.clearcoatRoughness;\n\n\t\tif ( this.clearcoatNormalMap && this.clearcoatNormalMap.isTexture ) {\n\n\t\t\tdata.clearcoatNormalMap = this.clearcoatNormalMap.toJSON( meta ).uuid;\n\t\t\tdata.clearcoatNormalScale = this.clearcoatNormalScale.toArray();\n\n\t\t}\n\n\t\tif ( this.map && this.map.isTexture ) data.map = this.map.toJSON( meta ).uuid;\n\t\tif ( this.matcap && this.matcap.isTexture ) data.matcap = this.matcap.toJSON( meta ).uuid;\n\t\tif ( this.alphaMap && this.alphaMap.isTexture ) data.alphaMap = this.alphaMap.toJSON( meta ).uuid;\n\t\tif ( this.lightMap && this.lightMap.isTexture ) data.lightMap = this.lightMap.toJSON( meta ).uuid;\n\n\t\tif ( this.aoMap && this.aoMap.isTexture ) {\n\n\t\t\tdata.aoMap = this.aoMap.toJSON( meta ).uuid;\n\t\t\tdata.aoMapIntensity = this.aoMapIntensity;\n\n\t\t}\n\n\t\tif ( this.bumpMap && this.bumpMap.isTexture ) {\n\n\t\t\tdata.bumpMap = this.bumpMap.toJSON( meta ).uuid;\n\t\t\tdata.bumpScale = this.bumpScale;\n\n\t\t}\n\n\t\tif ( this.normalMap && this.normalMap.isTexture ) {\n\n\t\t\tdata.normalMap = this.normalMap.toJSON( meta ).uuid;\n\t\t\tdata.normalMapType = this.normalMapType;\n\t\t\tdata.normalScale = this.normalScale.toArray();\n\n\t\t}\n\n\t\tif ( this.displacementMap && this.displacementMap.isTexture ) {\n\n\t\t\tdata.displacementMap = this.displacementMap.toJSON( meta ).uuid;\n\t\t\tdata.displacementScale = this.displacementScale;\n\t\t\tdata.displacementBias = this.displacementBias;\n\n\t\t}\n\n\t\tif ( this.roughnessMap && this.roughnessMap.isTexture ) data.roughnessMap = this.roughnessMap.toJSON( meta ).uuid;\n\t\tif ( this.metalnessMap && this.metalnessMap.isTexture ) data.metalnessMap = this.metalnessMap.toJSON( meta ).uuid;\n\n\t\tif ( this.emissiveMap && this.emissiveMap.isTexture ) data.emissiveMap = this.emissiveMap.toJSON( meta ).uuid;\n\t\tif ( this.specularMap && this.specularMap.isTexture ) data.specularMap = this.specularMap.toJSON( meta ).uuid;\n\n\t\tif ( this.envMap && this.envMap.isTexture ) {\n\n\t\t\tdata.envMap = this.envMap.toJSON( meta ).uuid;\n\t\t\tdata.reflectivity = this.reflectivity; // Scale behind envMap\n\t\t\tdata.refractionRatio = this.refractionRatio;\n\n\t\t\tif ( this.combine !== undefined ) data.combine = this.combine;\n\t\t\tif ( this.envMapIntensity !== undefined ) data.envMapIntensity = this.envMapIntensity;\n\n\t\t}\n\n\t\tif ( this.gradientMap && this.gradientMap.isTexture ) {\n\n\t\t\tdata.gradientMap = this.gradientMap.toJSON( meta ).uuid;\n\n\t\t}\n\n\t\tif ( this.size !== undefined ) data.size = this.size;\n\t\tif ( this.sizeAttenuation !== undefined ) data.sizeAttenuation = this.sizeAttenuation;\n\n\t\tif ( this.blending !== NormalBlending ) data.blending = this.blending;\n\t\tif ( this.flatShading === true ) data.flatShading = this.flatShading;\n\t\tif ( this.side !== FrontSide ) data.side = this.side;\n\t\tif ( this.vertexColors ) data.vertexColors = true;\n\n\t\tif ( this.opacity < 1 ) data.opacity = this.opacity;\n\t\tif ( this.transparent === true ) data.transparent = this.transparent;\n\n\t\tdata.depthFunc = this.depthFunc;\n\t\tdata.depthTest = this.depthTest;\n\t\tdata.depthWrite = this.depthWrite;\n\n\t\tdata.stencilWrite = this.stencilWrite;\n\t\tdata.stencilWriteMask = this.stencilWriteMask;\n\t\tdata.stencilFunc = this.stencilFunc;\n\t\tdata.stencilRef = this.stencilRef;\n\t\tdata.stencilFuncMask = this.stencilFuncMask;\n\t\tdata.stencilFail = this.stencilFail;\n\t\tdata.stencilZFail = this.stencilZFail;\n\t\tdata.stencilZPass = this.stencilZPass;\n\n\t\t// rotation (SpriteMaterial)\n\t\tif ( this.rotation && this.rotation !== 0 ) data.rotation = this.rotation;\n\n\t\tif ( this.polygonOffset === true ) data.polygonOffset = true;\n\t\tif ( this.polygonOffsetFactor !== 0 ) data.polygonOffsetFactor = this.polygonOffsetFactor;\n\t\tif ( this.polygonOffsetUnits !== 0 ) data.polygonOffsetUnits = this.polygonOffsetUnits;\n\n\t\tif ( this.linewidth && this.linewidth !== 1 ) data.linewidth = this.linewidth;\n\t\tif ( this.dashSize !== undefined ) data.dashSize = this.dashSize;\n\t\tif ( this.gapSize !== undefined ) data.gapSize = this.gapSize;\n\t\tif ( this.scale !== undefined ) data.scale = this.scale;\n\n\t\tif ( this.dithering === true ) data.dithering = true;\n\n\t\tif ( this.alphaTest > 0 ) data.alphaTest = this.alphaTest;\n\t\tif ( this.premultipliedAlpha === true ) data.premultipliedAlpha = this.premultipliedAlpha;\n\n\t\tif ( this.wireframe === true ) data.wireframe = this.wireframe;\n\t\tif ( this.wireframeLinewidth > 1 ) data.wireframeLinewidth = this.wireframeLinewidth;\n\t\tif ( this.wireframeLinecap !== 'round' ) data.wireframeLinecap = this.wireframeLinecap;\n\t\tif ( this.wireframeLinejoin !== 'round' ) data.wireframeLinejoin = this.wireframeLinejoin;\n\n\t\tif ( this.morphTargets === true ) data.morphTargets = true;\n\t\tif ( this.morphNormals === true ) data.morphNormals = true;\n\t\tif ( this.skinning === true ) data.skinning = true;\n\n\t\tif ( this.visible === false ) data.visible = false;\n\n\t\tif ( this.toneMapped === false ) data.toneMapped = false;\n\n\t\tif ( JSON.stringify( this.userData ) !== '{}' ) data.userData = this.userData;\n\n\t\t// TODO: Copied from Object3D.toJSON\n\n\t\tfunction extractFromCache( cache ) {\n\n\t\t\tvar values = [];\n\n\t\t\tfor ( var key in cache ) {\n\n\t\t\t\tvar data = cache[ key ];\n\t\t\t\tdelete data.metadata;\n\t\t\t\tvalues.push( data );\n\n\t\t\t}\n\n\t\t\treturn values;\n\n\t\t}\n\n\t\tif ( isRoot ) {\n\n\t\t\tvar textures = extractFromCache( meta.textures );\n\t\t\tvar images = extractFromCache( meta.images );\n\n\t\t\tif ( textures.length > 0 ) data.textures = textures;\n\t\t\tif ( images.length > 0 ) data.images = images;\n\n\t\t}\n\n\t\treturn data;\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor().copy( this );\n\n\t},\n\n\tcopy: function ( source ) {\n\n\t\tthis.name = source.name;\n\n\t\tthis.fog = source.fog;\n\n\t\tthis.blending = source.blending;\n\t\tthis.side = source.side;\n\t\tthis.flatShading = source.flatShading;\n\t\tthis.vertexColors = source.vertexColors;\n\n\t\tthis.opacity = source.opacity;\n\t\tthis.transparent = source.transparent;\n\n\t\tthis.blendSrc = source.blendSrc;\n\t\tthis.blendDst = source.blendDst;\n\t\tthis.blendEquation = source.blendEquation;\n\t\tthis.blendSrcAlpha = source.blendSrcAlpha;\n\t\tthis.blendDstAlpha = source.blendDstAlpha;\n\t\tthis.blendEquationAlpha = source.blendEquationAlpha;\n\n\t\tthis.depthFunc = source.depthFunc;\n\t\tthis.depthTest = source.depthTest;\n\t\tthis.depthWrite = source.depthWrite;\n\n\t\tthis.stencilWriteMask = source.stencilWriteMask;\n\t\tthis.stencilFunc = source.stencilFunc;\n\t\tthis.stencilRef = source.stencilRef;\n\t\tthis.stencilFuncMask = source.stencilFuncMask;\n\t\tthis.stencilFail = source.stencilFail;\n\t\tthis.stencilZFail = source.stencilZFail;\n\t\tthis.stencilZPass = source.stencilZPass;\n\t\tthis.stencilWrite = source.stencilWrite;\n\n\t\tvar srcPlanes = source.clippingPlanes,\n\t\t\tdstPlanes = null;\n\n\t\tif ( srcPlanes !== null ) {\n\n\t\t\tvar n = srcPlanes.length;\n\t\t\tdstPlanes = new Array( n );\n\n\t\t\tfor ( var i = 0; i !== n; ++ i )\n\t\t\t\tdstPlanes[ i ] = srcPlanes[ i ].clone();\n\n\t\t}\n\n\t\tthis.clippingPlanes = dstPlanes;\n\t\tthis.clipIntersection = source.clipIntersection;\n\t\tthis.clipShadows = source.clipShadows;\n\n\t\tthis.shadowSide = source.shadowSide;\n\n\t\tthis.colorWrite = source.colorWrite;\n\n\t\tthis.precision = source.precision;\n\n\t\tthis.polygonOffset = source.polygonOffset;\n\t\tthis.polygonOffsetFactor = source.polygonOffsetFactor;\n\t\tthis.polygonOffsetUnits = source.polygonOffsetUnits;\n\n\t\tthis.dithering = source.dithering;\n\n\t\tthis.alphaTest = source.alphaTest;\n\t\tthis.premultipliedAlpha = source.premultipliedAlpha;\n\n\t\tthis.visible = source.visible;\n\n\t\tthis.toneMapped = source.toneMapped;\n\n\t\tthis.userData = JSON.parse( JSON.stringify( source.userData ) );\n\n\t\treturn this;\n\n\t},\n\n\tdispose: function () {\n\n\t\tthis.dispatchEvent( { type: 'dispose' } );\n\n\t}\n\n} );\n\nObject.defineProperty( Material.prototype, 'needsUpdate', {\n\n\tset: function ( value ) {\n\n\t\tif ( value === true ) this.version ++;\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n *\n * parameters = {\n *  color: <hex>,\n *  opacity: <float>,\n *  map: new THREE.Texture( <Image> ),\n *\n *  lightMap: new THREE.Texture( <Image> ),\n *  lightMapIntensity: <float>\n *\n *  aoMap: new THREE.Texture( <Image> ),\n *  aoMapIntensity: <float>\n *\n *  specularMap: new THREE.Texture( <Image> ),\n *\n *  alphaMap: new THREE.Texture( <Image> ),\n *\n *  envMap: new THREE.CubeTexture( [posx, negx, posy, negy, posz, negz] ),\n *  combine: THREE.Multiply,\n *  reflectivity: <float>,\n *  refractionRatio: <float>,\n *\n *  depthTest: <bool>,\n *  depthWrite: <bool>,\n *\n *  wireframe: <boolean>,\n *  wireframeLinewidth: <float>,\n *\n *  skinning: <bool>,\n *  morphTargets: <bool>\n * }\n */\n\nfunction MeshBasicMaterial( parameters ) {\n\n\tMaterial.call( this );\n\n\tthis.type = 'MeshBasicMaterial';\n\n\tthis.color = new Color( 0xffffff ); // emissive\n\n\tthis.map = null;\n\n\tthis.lightMap = null;\n\tthis.lightMapIntensity = 1.0;\n\n\tthis.aoMap = null;\n\tthis.aoMapIntensity = 1.0;\n\n\tthis.specularMap = null;\n\n\tthis.alphaMap = null;\n\n\tthis.envMap = null;\n\tthis.combine = MultiplyOperation;\n\tthis.reflectivity = 1;\n\tthis.refractionRatio = 0.98;\n\n\tthis.wireframe = false;\n\tthis.wireframeLinewidth = 1;\n\tthis.wireframeLinecap = 'round';\n\tthis.wireframeLinejoin = 'round';\n\n\tthis.skinning = false;\n\tthis.morphTargets = false;\n\n\tthis.setValues( parameters );\n\n}\n\nMeshBasicMaterial.prototype = Object.create( Material.prototype );\nMeshBasicMaterial.prototype.constructor = MeshBasicMaterial;\n\nMeshBasicMaterial.prototype.isMeshBasicMaterial = true;\n\nMeshBasicMaterial.prototype.copy = function ( source ) {\n\n\tMaterial.prototype.copy.call( this, source );\n\n\tthis.color.copy( source.color );\n\n\tthis.map = source.map;\n\n\tthis.lightMap = source.lightMap;\n\tthis.lightMapIntensity = source.lightMapIntensity;\n\n\tthis.aoMap = source.aoMap;\n\tthis.aoMapIntensity = source.aoMapIntensity;\n\n\tthis.specularMap = source.specularMap;\n\n\tthis.alphaMap = source.alphaMap;\n\n\tthis.envMap = source.envMap;\n\tthis.combine = source.combine;\n\tthis.reflectivity = source.reflectivity;\n\tthis.refractionRatio = source.refractionRatio;\n\n\tthis.wireframe = source.wireframe;\n\tthis.wireframeLinewidth = source.wireframeLinewidth;\n\tthis.wireframeLinecap = source.wireframeLinecap;\n\tthis.wireframeLinejoin = source.wireframeLinejoin;\n\n\tthis.skinning = source.skinning;\n\tthis.morphTargets = source.morphTargets;\n\n\treturn this;\n\n};\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nvar _vector$3 = new Vector3();\n\nfunction BufferAttribute( array, itemSize, normalized ) {\n\n\tif ( Array.isArray( array ) ) {\n\n\t\tthrow new TypeError( 'THREE.BufferAttribute: array should be a Typed Array.' );\n\n\t}\n\n\tthis.name = '';\n\n\tthis.array = array;\n\tthis.itemSize = itemSize;\n\tthis.count = array !== undefined ? array.length / itemSize : 0;\n\tthis.normalized = normalized === true;\n\n\tthis.usage = StaticDrawUsage;\n\tthis.updateRange = { offset: 0, count: - 1 };\n\n\tthis.version = 0;\n\n}\n\nObject.defineProperty( BufferAttribute.prototype, 'needsUpdate', {\n\n\tset: function ( value ) {\n\n\t\tif ( value === true ) this.version ++;\n\n\t}\n\n} );\n\nObject.assign( BufferAttribute.prototype, {\n\n\tisBufferAttribute: true,\n\n\tonUploadCallback: function () {},\n\n\tsetUsage: function ( value ) {\n\n\t\tthis.usage = value;\n\n\t\treturn this;\n\n\t},\n\n\tcopy: function ( source ) {\n\n\t\tthis.name = source.name;\n\t\tthis.array = new source.array.constructor( source.array );\n\t\tthis.itemSize = source.itemSize;\n\t\tthis.count = source.count;\n\t\tthis.normalized = source.normalized;\n\n\t\tthis.usage = source.usage;\n\n\t\treturn this;\n\n\t},\n\n\tcopyAt: function ( index1, attribute, index2 ) {\n\n\t\tindex1 *= this.itemSize;\n\t\tindex2 *= attribute.itemSize;\n\n\t\tfor ( var i = 0, l = this.itemSize; i < l; i ++ ) {\n\n\t\t\tthis.array[ index1 + i ] = attribute.array[ index2 + i ];\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tcopyArray: function ( array ) {\n\n\t\tthis.array.set( array );\n\n\t\treturn this;\n\n\t},\n\n\tcopyColorsArray: function ( colors ) {\n\n\t\tvar array = this.array, offset = 0;\n\n\t\tfor ( var i = 0, l = colors.length; i < l; i ++ ) {\n\n\t\t\tvar color = colors[ i ];\n\n\t\t\tif ( color === undefined ) {\n\n\t\t\t\tconsole.warn( 'THREE.BufferAttribute.copyColorsArray(): color is undefined', i );\n\t\t\t\tcolor = new Color();\n\n\t\t\t}\n\n\t\t\tarray[ offset ++ ] = color.r;\n\t\t\tarray[ offset ++ ] = color.g;\n\t\t\tarray[ offset ++ ] = color.b;\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tcopyVector2sArray: function ( vectors ) {\n\n\t\tvar array = this.array, offset = 0;\n\n\t\tfor ( var i = 0, l = vectors.length; i < l; i ++ ) {\n\n\t\t\tvar vector = vectors[ i ];\n\n\t\t\tif ( vector === undefined ) {\n\n\t\t\t\tconsole.warn( 'THREE.BufferAttribute.copyVector2sArray(): vector is undefined', i );\n\t\t\t\tvector = new Vector2();\n\n\t\t\t}\n\n\t\t\tarray[ offset ++ ] = vector.x;\n\t\t\tarray[ offset ++ ] = vector.y;\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tcopyVector3sArray: function ( vectors ) {\n\n\t\tvar array = this.array, offset = 0;\n\n\t\tfor ( var i = 0, l = vectors.length; i < l; i ++ ) {\n\n\t\t\tvar vector = vectors[ i ];\n\n\t\t\tif ( vector === undefined ) {\n\n\t\t\t\tconsole.warn( 'THREE.BufferAttribute.copyVector3sArray(): vector is undefined', i );\n\t\t\t\tvector = new Vector3();\n\n\t\t\t}\n\n\t\t\tarray[ offset ++ ] = vector.x;\n\t\t\tarray[ offset ++ ] = vector.y;\n\t\t\tarray[ offset ++ ] = vector.z;\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tcopyVector4sArray: function ( vectors ) {\n\n\t\tvar array = this.array, offset = 0;\n\n\t\tfor ( var i = 0, l = vectors.length; i < l; i ++ ) {\n\n\t\t\tvar vector = vectors[ i ];\n\n\t\t\tif ( vector === undefined ) {\n\n\t\t\t\tconsole.warn( 'THREE.BufferAttribute.copyVector4sArray(): vector is undefined', i );\n\t\t\t\tvector = new Vector4();\n\n\t\t\t}\n\n\t\t\tarray[ offset ++ ] = vector.x;\n\t\t\tarray[ offset ++ ] = vector.y;\n\t\t\tarray[ offset ++ ] = vector.z;\n\t\t\tarray[ offset ++ ] = vector.w;\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tapplyMatrix3: function ( m ) {\n\n\t\tfor ( var i = 0, l = this.count; i < l; i ++ ) {\n\n\t\t\t_vector$3.x = this.getX( i );\n\t\t\t_vector$3.y = this.getY( i );\n\t\t\t_vector$3.z = this.getZ( i );\n\n\t\t\t_vector$3.applyMatrix3( m );\n\n\t\t\tthis.setXYZ( i, _vector$3.x, _vector$3.y, _vector$3.z );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tapplyMatrix4: function ( m ) {\n\n\t\tfor ( var i = 0, l = this.count; i < l; i ++ ) {\n\n\t\t\t_vector$3.x = this.getX( i );\n\t\t\t_vector$3.y = this.getY( i );\n\t\t\t_vector$3.z = this.getZ( i );\n\n\t\t\t_vector$3.applyMatrix4( m );\n\n\t\t\tthis.setXYZ( i, _vector$3.x, _vector$3.y, _vector$3.z );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tapplyNormalMatrix: function ( m ) {\n\n\t\tfor ( var i = 0, l = this.count; i < l; i ++ ) {\n\n\t\t\t_vector$3.x = this.getX( i );\n\t\t\t_vector$3.y = this.getY( i );\n\t\t\t_vector$3.z = this.getZ( i );\n\n\t\t\t_vector$3.applyNormalMatrix( m );\n\n\t\t\tthis.setXYZ( i, _vector$3.x, _vector$3.y, _vector$3.z );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\ttransformDirection: function ( m ) {\n\n\t\tfor ( var i = 0, l = this.count; i < l; i ++ ) {\n\n\t\t\t_vector$3.x = this.getX( i );\n\t\t\t_vector$3.y = this.getY( i );\n\t\t\t_vector$3.z = this.getZ( i );\n\n\t\t\t_vector$3.transformDirection( m );\n\n\t\t\tthis.setXYZ( i, _vector$3.x, _vector$3.y, _vector$3.z );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tset: function ( value, offset ) {\n\n\t\tif ( offset === undefined ) offset = 0;\n\n\t\tthis.array.set( value, offset );\n\n\t\treturn this;\n\n\t},\n\n\tgetX: function ( index ) {\n\n\t\treturn this.array[ index * this.itemSize ];\n\n\t},\n\n\tsetX: function ( index, x ) {\n\n\t\tthis.array[ index * this.itemSize ] = x;\n\n\t\treturn this;\n\n\t},\n\n\tgetY: function ( index ) {\n\n\t\treturn this.array[ index * this.itemSize + 1 ];\n\n\t},\n\n\tsetY: function ( index, y ) {\n\n\t\tthis.array[ index * this.itemSize + 1 ] = y;\n\n\t\treturn this;\n\n\t},\n\n\tgetZ: function ( index ) {\n\n\t\treturn this.array[ index * this.itemSize + 2 ];\n\n\t},\n\n\tsetZ: function ( index, z ) {\n\n\t\tthis.array[ index * this.itemSize + 2 ] = z;\n\n\t\treturn this;\n\n\t},\n\n\tgetW: function ( index ) {\n\n\t\treturn this.array[ index * this.itemSize + 3 ];\n\n\t},\n\n\tsetW: function ( index, w ) {\n\n\t\tthis.array[ index * this.itemSize + 3 ] = w;\n\n\t\treturn this;\n\n\t},\n\n\tsetXY: function ( index, x, y ) {\n\n\t\tindex *= this.itemSize;\n\n\t\tthis.array[ index + 0 ] = x;\n\t\tthis.array[ index + 1 ] = y;\n\n\t\treturn this;\n\n\t},\n\n\tsetXYZ: function ( index, x, y, z ) {\n\n\t\tindex *= this.itemSize;\n\n\t\tthis.array[ index + 0 ] = x;\n\t\tthis.array[ index + 1 ] = y;\n\t\tthis.array[ index + 2 ] = z;\n\n\t\treturn this;\n\n\t},\n\n\tsetXYZW: function ( index, x, y, z, w ) {\n\n\t\tindex *= this.itemSize;\n\n\t\tthis.array[ index + 0 ] = x;\n\t\tthis.array[ index + 1 ] = y;\n\t\tthis.array[ index + 2 ] = z;\n\t\tthis.array[ index + 3 ] = w;\n\n\t\treturn this;\n\n\t},\n\n\tonUpload: function ( callback ) {\n\n\t\tthis.onUploadCallback = callback;\n\n\t\treturn this;\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor( this.array, this.itemSize ).copy( this );\n\n\t},\n\n\ttoJSON: function () {\n\n\t\treturn {\n\t\t\titemSize: this.itemSize,\n\t\t\ttype: this.array.constructor.name,\n\t\t\tarray: Array.prototype.slice.call( this.array ),\n\t\t\tnormalized: this.normalized\n\t\t};\n\n\t}\n\n} );\n\n//\n\nfunction Int8BufferAttribute( array, itemSize, normalized ) {\n\n\tBufferAttribute.call( this, new Int8Array( array ), itemSize, normalized );\n\n}\n\nInt8BufferAttribute.prototype = Object.create( BufferAttribute.prototype );\nInt8BufferAttribute.prototype.constructor = Int8BufferAttribute;\n\n\nfunction Uint8BufferAttribute( array, itemSize, normalized ) {\n\n\tBufferAttribute.call( this, new Uint8Array( array ), itemSize, normalized );\n\n}\n\nUint8BufferAttribute.prototype = Object.create( BufferAttribute.prototype );\nUint8BufferAttribute.prototype.constructor = Uint8BufferAttribute;\n\n\nfunction Uint8ClampedBufferAttribute( array, itemSize, normalized ) {\n\n\tBufferAttribute.call( this, new Uint8ClampedArray( array ), itemSize, normalized );\n\n}\n\nUint8ClampedBufferAttribute.prototype = Object.create( BufferAttribute.prototype );\nUint8ClampedBufferAttribute.prototype.constructor = Uint8ClampedBufferAttribute;\n\n\nfunction Int16BufferAttribute( array, itemSize, normalized ) {\n\n\tBufferAttribute.call( this, new Int16Array( array ), itemSize, normalized );\n\n}\n\nInt16BufferAttribute.prototype = Object.create( BufferAttribute.prototype );\nInt16BufferAttribute.prototype.constructor = Int16BufferAttribute;\n\n\nfunction Uint16BufferAttribute( array, itemSize, normalized ) {\n\n\tBufferAttribute.call( this, new Uint16Array( array ), itemSize, normalized );\n\n}\n\nUint16BufferAttribute.prototype = Object.create( BufferAttribute.prototype );\nUint16BufferAttribute.prototype.constructor = Uint16BufferAttribute;\n\n\nfunction Int32BufferAttribute( array, itemSize, normalized ) {\n\n\tBufferAttribute.call( this, new Int32Array( array ), itemSize, normalized );\n\n}\n\nInt32BufferAttribute.prototype = Object.create( BufferAttribute.prototype );\nInt32BufferAttribute.prototype.constructor = Int32BufferAttribute;\n\n\nfunction Uint32BufferAttribute( array, itemSize, normalized ) {\n\n\tBufferAttribute.call( this, new Uint32Array( array ), itemSize, normalized );\n\n}\n\nUint32BufferAttribute.prototype = Object.create( BufferAttribute.prototype );\nUint32BufferAttribute.prototype.constructor = Uint32BufferAttribute;\n\n\nfunction Float32BufferAttribute( array, itemSize, normalized ) {\n\n\tBufferAttribute.call( this, new Float32Array( array ), itemSize, normalized );\n\n}\n\nFloat32BufferAttribute.prototype = Object.create( BufferAttribute.prototype );\nFloat32BufferAttribute.prototype.constructor = Float32BufferAttribute;\n\n\nfunction Float64BufferAttribute( array, itemSize, normalized ) {\n\n\tBufferAttribute.call( this, new Float64Array( array ), itemSize, normalized );\n\n}\n\nFloat64BufferAttribute.prototype = Object.create( BufferAttribute.prototype );\nFloat64BufferAttribute.prototype.constructor = Float64BufferAttribute;\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction DirectGeometry() {\n\n\tthis.vertices = [];\n\tthis.normals = [];\n\tthis.colors = [];\n\tthis.uvs = [];\n\tthis.uvs2 = [];\n\n\tthis.groups = [];\n\n\tthis.morphTargets = {};\n\n\tthis.skinWeights = [];\n\tthis.skinIndices = [];\n\n\t// this.lineDistances = [];\n\n\tthis.boundingBox = null;\n\tthis.boundingSphere = null;\n\n\t// update flags\n\n\tthis.verticesNeedUpdate = false;\n\tthis.normalsNeedUpdate = false;\n\tthis.colorsNeedUpdate = false;\n\tthis.uvsNeedUpdate = false;\n\tthis.groupsNeedUpdate = false;\n\n}\n\nObject.assign( DirectGeometry.prototype, {\n\n\tcomputeGroups: function ( geometry ) {\n\n\t\tvar group;\n\t\tvar groups = [];\n\t\tvar materialIndex = undefined;\n\n\t\tvar faces = geometry.faces;\n\n\t\tfor ( var i = 0; i < faces.length; i ++ ) {\n\n\t\t\tvar face = faces[ i ];\n\n\t\t\t// materials\n\n\t\t\tif ( face.materialIndex !== materialIndex ) {\n\n\t\t\t\tmaterialIndex = face.materialIndex;\n\n\t\t\t\tif ( group !== undefined ) {\n\n\t\t\t\t\tgroup.count = ( i * 3 ) - group.start;\n\t\t\t\t\tgroups.push( group );\n\n\t\t\t\t}\n\n\t\t\t\tgroup = {\n\t\t\t\t\tstart: i * 3,\n\t\t\t\t\tmaterialIndex: materialIndex\n\t\t\t\t};\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( group !== undefined ) {\n\n\t\t\tgroup.count = ( i * 3 ) - group.start;\n\t\t\tgroups.push( group );\n\n\t\t}\n\n\t\tthis.groups = groups;\n\n\t},\n\n\tfromGeometry: function ( geometry ) {\n\n\t\tvar faces = geometry.faces;\n\t\tvar vertices = geometry.vertices;\n\t\tvar faceVertexUvs = geometry.faceVertexUvs;\n\n\t\tvar hasFaceVertexUv = faceVertexUvs[ 0 ] && faceVertexUvs[ 0 ].length > 0;\n\t\tvar hasFaceVertexUv2 = faceVertexUvs[ 1 ] && faceVertexUvs[ 1 ].length > 0;\n\n\t\t// morphs\n\n\t\tvar morphTargets = geometry.morphTargets;\n\t\tvar morphTargetsLength = morphTargets.length;\n\n\t\tvar morphTargetsPosition;\n\n\t\tif ( morphTargetsLength > 0 ) {\n\n\t\t\tmorphTargetsPosition = [];\n\n\t\t\tfor ( var i = 0; i < morphTargetsLength; i ++ ) {\n\n\t\t\t\tmorphTargetsPosition[ i ] = {\n\t\t\t\t\tname: morphTargets[ i ].name,\n\t\t\t\t \tdata: []\n\t\t\t\t};\n\n\t\t\t}\n\n\t\t\tthis.morphTargets.position = morphTargetsPosition;\n\n\t\t}\n\n\t\tvar morphNormals = geometry.morphNormals;\n\t\tvar morphNormalsLength = morphNormals.length;\n\n\t\tvar morphTargetsNormal;\n\n\t\tif ( morphNormalsLength > 0 ) {\n\n\t\t\tmorphTargetsNormal = [];\n\n\t\t\tfor ( var i = 0; i < morphNormalsLength; i ++ ) {\n\n\t\t\t\tmorphTargetsNormal[ i ] = {\n\t\t\t\t\tname: morphNormals[ i ].name,\n\t\t\t\t \tdata: []\n\t\t\t\t};\n\n\t\t\t}\n\n\t\t\tthis.morphTargets.normal = morphTargetsNormal;\n\n\t\t}\n\n\t\t// skins\n\n\t\tvar skinIndices = geometry.skinIndices;\n\t\tvar skinWeights = geometry.skinWeights;\n\n\t\tvar hasSkinIndices = skinIndices.length === vertices.length;\n\t\tvar hasSkinWeights = skinWeights.length === vertices.length;\n\n\t\t//\n\n\t\tif ( vertices.length > 0 && faces.length === 0 ) {\n\n\t\t\tconsole.error( 'THREE.DirectGeometry: Faceless geometries are not supported.' );\n\n\t\t}\n\n\t\tfor ( var i = 0; i < faces.length; i ++ ) {\n\n\t\t\tvar face = faces[ i ];\n\n\t\t\tthis.vertices.push( vertices[ face.a ], vertices[ face.b ], vertices[ face.c ] );\n\n\t\t\tvar vertexNormals = face.vertexNormals;\n\n\t\t\tif ( vertexNormals.length === 3 ) {\n\n\t\t\t\tthis.normals.push( vertexNormals[ 0 ], vertexNormals[ 1 ], vertexNormals[ 2 ] );\n\n\t\t\t} else {\n\n\t\t\t\tvar normal = face.normal;\n\n\t\t\t\tthis.normals.push( normal, normal, normal );\n\n\t\t\t}\n\n\t\t\tvar vertexColors = face.vertexColors;\n\n\t\t\tif ( vertexColors.length === 3 ) {\n\n\t\t\t\tthis.colors.push( vertexColors[ 0 ], vertexColors[ 1 ], vertexColors[ 2 ] );\n\n\t\t\t} else {\n\n\t\t\t\tvar color = face.color;\n\n\t\t\t\tthis.colors.push( color, color, color );\n\n\t\t\t}\n\n\t\t\tif ( hasFaceVertexUv === true ) {\n\n\t\t\t\tvar vertexUvs = faceVertexUvs[ 0 ][ i ];\n\n\t\t\t\tif ( vertexUvs !== undefined ) {\n\n\t\t\t\t\tthis.uvs.push( vertexUvs[ 0 ], vertexUvs[ 1 ], vertexUvs[ 2 ] );\n\n\t\t\t\t} else {\n\n\t\t\t\t\tconsole.warn( 'THREE.DirectGeometry.fromGeometry(): Undefined vertexUv ', i );\n\n\t\t\t\t\tthis.uvs.push( new Vector2(), new Vector2(), new Vector2() );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tif ( hasFaceVertexUv2 === true ) {\n\n\t\t\t\tvar vertexUvs = faceVertexUvs[ 1 ][ i ];\n\n\t\t\t\tif ( vertexUvs !== undefined ) {\n\n\t\t\t\t\tthis.uvs2.push( vertexUvs[ 0 ], vertexUvs[ 1 ], vertexUvs[ 2 ] );\n\n\t\t\t\t} else {\n\n\t\t\t\t\tconsole.warn( 'THREE.DirectGeometry.fromGeometry(): Undefined vertexUv2 ', i );\n\n\t\t\t\t\tthis.uvs2.push( new Vector2(), new Vector2(), new Vector2() );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\t// morphs\n\n\t\t\tfor ( var j = 0; j < morphTargetsLength; j ++ ) {\n\n\t\t\t\tvar morphTarget = morphTargets[ j ].vertices;\n\n\t\t\t\tmorphTargetsPosition[ j ].data.push( morphTarget[ face.a ], morphTarget[ face.b ], morphTarget[ face.c ] );\n\n\t\t\t}\n\n\t\t\tfor ( var j = 0; j < morphNormalsLength; j ++ ) {\n\n\t\t\t\tvar morphNormal = morphNormals[ j ].vertexNormals[ i ];\n\n\t\t\t\tmorphTargetsNormal[ j ].data.push( morphNormal.a, morphNormal.b, morphNormal.c );\n\n\t\t\t}\n\n\t\t\t// skins\n\n\t\t\tif ( hasSkinIndices ) {\n\n\t\t\t\tthis.skinIndices.push( skinIndices[ face.a ], skinIndices[ face.b ], skinIndices[ face.c ] );\n\n\t\t\t}\n\n\t\t\tif ( hasSkinWeights ) {\n\n\t\t\t\tthis.skinWeights.push( skinWeights[ face.a ], skinWeights[ face.b ], skinWeights[ face.c ] );\n\n\t\t\t}\n\n\t\t}\n\n\t\tthis.computeGroups( geometry );\n\n\t\tthis.verticesNeedUpdate = geometry.verticesNeedUpdate;\n\t\tthis.normalsNeedUpdate = geometry.normalsNeedUpdate;\n\t\tthis.colorsNeedUpdate = geometry.colorsNeedUpdate;\n\t\tthis.uvsNeedUpdate = geometry.uvsNeedUpdate;\n\t\tthis.groupsNeedUpdate = geometry.groupsNeedUpdate;\n\n\t\tif ( geometry.boundingSphere !== null ) {\n\n\t\t\tthis.boundingSphere = geometry.boundingSphere.clone();\n\n\t\t}\n\n\t\tif ( geometry.boundingBox !== null ) {\n\n\t\t\tthis.boundingBox = geometry.boundingBox.clone();\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction arrayMax( array ) {\n\n\tif ( array.length === 0 ) return - Infinity;\n\n\tvar max = array[ 0 ];\n\n\tfor ( var i = 1, l = array.length; i < l; ++ i ) {\n\n\t\tif ( array[ i ] > max ) max = array[ i ];\n\n\t}\n\n\treturn max;\n\n}\n\n/**\n * @author alteredq / http://alteredqualia.com/\n * @author mrdoob / http://mrdoob.com/\n */\n\nvar _bufferGeometryId = 1; // BufferGeometry uses odd numbers as Id\n\nvar _m1$2 = new Matrix4();\nvar _obj = new Object3D();\nvar _offset = new Vector3();\nvar _box$2 = new Box3();\nvar _boxMorphTargets = new Box3();\nvar _vector$4 = new Vector3();\n\nfunction BufferGeometry() {\n\n\tObject.defineProperty( this, 'id', { value: _bufferGeometryId += 2 } );\n\n\tthis.uuid = MathUtils.generateUUID();\n\n\tthis.name = '';\n\tthis.type = 'BufferGeometry';\n\n\tthis.index = null;\n\tthis.attributes = {};\n\n\tthis.morphAttributes = {};\n\tthis.morphTargetsRelative = false;\n\n\tthis.groups = [];\n\n\tthis.boundingBox = null;\n\tthis.boundingSphere = null;\n\n\tthis.drawRange = { start: 0, count: Infinity };\n\n\tthis.userData = {};\n\n}\n\nBufferGeometry.prototype = Object.assign( Object.create( EventDispatcher.prototype ), {\n\n\tconstructor: BufferGeometry,\n\n\tisBufferGeometry: true,\n\n\tgetIndex: function () {\n\n\t\treturn this.index;\n\n\t},\n\n\tsetIndex: function ( index ) {\n\n\t\tif ( Array.isArray( index ) ) {\n\n\t\t\tthis.index = new ( arrayMax( index ) > 65535 ? Uint32BufferAttribute : Uint16BufferAttribute )( index, 1 );\n\n\t\t} else {\n\n\t\t\tthis.index = index;\n\n\t\t}\n\n\t},\n\n\tgetAttribute: function ( name ) {\n\n\t\treturn this.attributes[ name ];\n\n\t},\n\n\tsetAttribute: function ( name, attribute ) {\n\n\t\tthis.attributes[ name ] = attribute;\n\n\t\treturn this;\n\n\t},\n\n\tdeleteAttribute: function ( name ) {\n\n\t\tdelete this.attributes[ name ];\n\n\t\treturn this;\n\n\t},\n\n\taddGroup: function ( start, count, materialIndex ) {\n\n\t\tthis.groups.push( {\n\n\t\t\tstart: start,\n\t\t\tcount: count,\n\t\t\tmaterialIndex: materialIndex !== undefined ? materialIndex : 0\n\n\t\t} );\n\n\t},\n\n\tclearGroups: function () {\n\n\t\tthis.groups = [];\n\n\t},\n\n\tsetDrawRange: function ( start, count ) {\n\n\t\tthis.drawRange.start = start;\n\t\tthis.drawRange.count = count;\n\n\t},\n\n\tapplyMatrix4: function ( matrix ) {\n\n\t\tvar position = this.attributes.position;\n\n\t\tif ( position !== undefined ) {\n\n\t\t\tposition.applyMatrix4( matrix );\n\n\t\t\tposition.needsUpdate = true;\n\n\t\t}\n\n\t\tvar normal = this.attributes.normal;\n\n\t\tif ( normal !== undefined ) {\n\n\t\t\tvar normalMatrix = new Matrix3().getNormalMatrix( matrix );\n\n\t\t\tnormal.applyNormalMatrix( normalMatrix );\n\n\t\t\tnormal.needsUpdate = true;\n\n\t\t}\n\n\t\tvar tangent = this.attributes.tangent;\n\n\t\tif ( tangent !== undefined ) {\n\n\t\t\ttangent.transformDirection( matrix );\n\n\t\t\ttangent.needsUpdate = true;\n\n\t\t}\n\n\t\tif ( this.boundingBox !== null ) {\n\n\t\t\tthis.computeBoundingBox();\n\n\t\t}\n\n\t\tif ( this.boundingSphere !== null ) {\n\n\t\t\tthis.computeBoundingSphere();\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\trotateX: function ( angle ) {\n\n\t\t// rotate geometry around world x-axis\n\n\t\t_m1$2.makeRotationX( angle );\n\n\t\tthis.applyMatrix4( _m1$2 );\n\n\t\treturn this;\n\n\t},\n\n\trotateY: function ( angle ) {\n\n\t\t// rotate geometry around world y-axis\n\n\t\t_m1$2.makeRotationY( angle );\n\n\t\tthis.applyMatrix4( _m1$2 );\n\n\t\treturn this;\n\n\t},\n\n\trotateZ: function ( angle ) {\n\n\t\t// rotate geometry around world z-axis\n\n\t\t_m1$2.makeRotationZ( angle );\n\n\t\tthis.applyMatrix4( _m1$2 );\n\n\t\treturn this;\n\n\t},\n\n\ttranslate: function ( x, y, z ) {\n\n\t\t// translate geometry\n\n\t\t_m1$2.makeTranslation( x, y, z );\n\n\t\tthis.applyMatrix4( _m1$2 );\n\n\t\treturn this;\n\n\t},\n\n\tscale: function ( x, y, z ) {\n\n\t\t// scale geometry\n\n\t\t_m1$2.makeScale( x, y, z );\n\n\t\tthis.applyMatrix4( _m1$2 );\n\n\t\treturn this;\n\n\t},\n\n\tlookAt: function ( vector ) {\n\n\t\t_obj.lookAt( vector );\n\n\t\t_obj.updateMatrix();\n\n\t\tthis.applyMatrix4( _obj.matrix );\n\n\t\treturn this;\n\n\t},\n\n\tcenter: function () {\n\n\t\tthis.computeBoundingBox();\n\n\t\tthis.boundingBox.getCenter( _offset ).negate();\n\n\t\tthis.translate( _offset.x, _offset.y, _offset.z );\n\n\t\treturn this;\n\n\t},\n\n\tsetFromObject: function ( object ) {\n\n\t\t// console.log( 'THREE.BufferGeometry.setFromObject(). Converting', object, this );\n\n\t\tvar geometry = object.geometry;\n\n\t\tif ( object.isPoints || object.isLine ) {\n\n\t\t\tvar positions = new Float32BufferAttribute( geometry.vertices.length * 3, 3 );\n\t\t\tvar colors = new Float32BufferAttribute( geometry.colors.length * 3, 3 );\n\n\t\t\tthis.setAttribute( 'position', positions.copyVector3sArray( geometry.vertices ) );\n\t\t\tthis.setAttribute( 'color', colors.copyColorsArray( geometry.colors ) );\n\n\t\t\tif ( geometry.lineDistances && geometry.lineDistances.length === geometry.vertices.length ) {\n\n\t\t\t\tvar lineDistances = new Float32BufferAttribute( geometry.lineDistances.length, 1 );\n\n\t\t\t\tthis.setAttribute( 'lineDistance', lineDistances.copyArray( geometry.lineDistances ) );\n\n\t\t\t}\n\n\t\t\tif ( geometry.boundingSphere !== null ) {\n\n\t\t\t\tthis.boundingSphere = geometry.boundingSphere.clone();\n\n\t\t\t}\n\n\t\t\tif ( geometry.boundingBox !== null ) {\n\n\t\t\t\tthis.boundingBox = geometry.boundingBox.clone();\n\n\t\t\t}\n\n\t\t} else if ( object.isMesh ) {\n\n\t\t\tif ( geometry && geometry.isGeometry ) {\n\n\t\t\t\tthis.fromGeometry( geometry );\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tsetFromPoints: function ( points ) {\n\n\t\tvar position = [];\n\n\t\tfor ( var i = 0, l = points.length; i < l; i ++ ) {\n\n\t\t\tvar point = points[ i ];\n\t\t\tposition.push( point.x, point.y, point.z || 0 );\n\n\t\t}\n\n\t\tthis.setAttribute( 'position', new Float32BufferAttribute( position, 3 ) );\n\n\t\treturn this;\n\n\t},\n\n\tupdateFromObject: function ( object ) {\n\n\t\tvar geometry = object.geometry;\n\n\t\tif ( object.isMesh ) {\n\n\t\t\tvar direct = geometry.__directGeometry;\n\n\t\t\tif ( geometry.elementsNeedUpdate === true ) {\n\n\t\t\t\tdirect = undefined;\n\t\t\t\tgeometry.elementsNeedUpdate = false;\n\n\t\t\t}\n\n\t\t\tif ( direct === undefined ) {\n\n\t\t\t\treturn this.fromGeometry( geometry );\n\n\t\t\t}\n\n\t\t\tdirect.verticesNeedUpdate = geometry.verticesNeedUpdate;\n\t\t\tdirect.normalsNeedUpdate = geometry.normalsNeedUpdate;\n\t\t\tdirect.colorsNeedUpdate = geometry.colorsNeedUpdate;\n\t\t\tdirect.uvsNeedUpdate = geometry.uvsNeedUpdate;\n\t\t\tdirect.groupsNeedUpdate = geometry.groupsNeedUpdate;\n\n\t\t\tgeometry.verticesNeedUpdate = false;\n\t\t\tgeometry.normalsNeedUpdate = false;\n\t\t\tgeometry.colorsNeedUpdate = false;\n\t\t\tgeometry.uvsNeedUpdate = false;\n\t\t\tgeometry.groupsNeedUpdate = false;\n\n\t\t\tgeometry = direct;\n\n\t\t}\n\n\t\tvar attribute;\n\n\t\tif ( geometry.verticesNeedUpdate === true ) {\n\n\t\t\tattribute = this.attributes.position;\n\n\t\t\tif ( attribute !== undefined ) {\n\n\t\t\t\tattribute.copyVector3sArray( geometry.vertices );\n\t\t\t\tattribute.needsUpdate = true;\n\n\t\t\t}\n\n\t\t\tgeometry.verticesNeedUpdate = false;\n\n\t\t}\n\n\t\tif ( geometry.normalsNeedUpdate === true ) {\n\n\t\t\tattribute = this.attributes.normal;\n\n\t\t\tif ( attribute !== undefined ) {\n\n\t\t\t\tattribute.copyVector3sArray( geometry.normals );\n\t\t\t\tattribute.needsUpdate = true;\n\n\t\t\t}\n\n\t\t\tgeometry.normalsNeedUpdate = false;\n\n\t\t}\n\n\t\tif ( geometry.colorsNeedUpdate === true ) {\n\n\t\t\tattribute = this.attributes.color;\n\n\t\t\tif ( attribute !== undefined ) {\n\n\t\t\t\tattribute.copyColorsArray( geometry.colors );\n\t\t\t\tattribute.needsUpdate = true;\n\n\t\t\t}\n\n\t\t\tgeometry.colorsNeedUpdate = false;\n\n\t\t}\n\n\t\tif ( geometry.uvsNeedUpdate ) {\n\n\t\t\tattribute = this.attributes.uv;\n\n\t\t\tif ( attribute !== undefined ) {\n\n\t\t\t\tattribute.copyVector2sArray( geometry.uvs );\n\t\t\t\tattribute.needsUpdate = true;\n\n\t\t\t}\n\n\t\t\tgeometry.uvsNeedUpdate = false;\n\n\t\t}\n\n\t\tif ( geometry.lineDistancesNeedUpdate ) {\n\n\t\t\tattribute = this.attributes.lineDistance;\n\n\t\t\tif ( attribute !== undefined ) {\n\n\t\t\t\tattribute.copyArray( geometry.lineDistances );\n\t\t\t\tattribute.needsUpdate = true;\n\n\t\t\t}\n\n\t\t\tgeometry.lineDistancesNeedUpdate = false;\n\n\t\t}\n\n\t\tif ( geometry.groupsNeedUpdate ) {\n\n\t\t\tgeometry.computeGroups( object.geometry );\n\t\t\tthis.groups = geometry.groups;\n\n\t\t\tgeometry.groupsNeedUpdate = false;\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tfromGeometry: function ( geometry ) {\n\n\t\tgeometry.__directGeometry = new DirectGeometry().fromGeometry( geometry );\n\n\t\treturn this.fromDirectGeometry( geometry.__directGeometry );\n\n\t},\n\n\tfromDirectGeometry: function ( geometry ) {\n\n\t\tvar positions = new Float32Array( geometry.vertices.length * 3 );\n\t\tthis.setAttribute( 'position', new BufferAttribute( positions, 3 ).copyVector3sArray( geometry.vertices ) );\n\n\t\tif ( geometry.normals.length > 0 ) {\n\n\t\t\tvar normals = new Float32Array( geometry.normals.length * 3 );\n\t\t\tthis.setAttribute( 'normal', new BufferAttribute( normals, 3 ).copyVector3sArray( geometry.normals ) );\n\n\t\t}\n\n\t\tif ( geometry.colors.length > 0 ) {\n\n\t\t\tvar colors = new Float32Array( geometry.colors.length * 3 );\n\t\t\tthis.setAttribute( 'color', new BufferAttribute( colors, 3 ).copyColorsArray( geometry.colors ) );\n\n\t\t}\n\n\t\tif ( geometry.uvs.length > 0 ) {\n\n\t\t\tvar uvs = new Float32Array( geometry.uvs.length * 2 );\n\t\t\tthis.setAttribute( 'uv', new BufferAttribute( uvs, 2 ).copyVector2sArray( geometry.uvs ) );\n\n\t\t}\n\n\t\tif ( geometry.uvs2.length > 0 ) {\n\n\t\t\tvar uvs2 = new Float32Array( geometry.uvs2.length * 2 );\n\t\t\tthis.setAttribute( 'uv2', new BufferAttribute( uvs2, 2 ).copyVector2sArray( geometry.uvs2 ) );\n\n\t\t}\n\n\t\t// groups\n\n\t\tthis.groups = geometry.groups;\n\n\t\t// morphs\n\n\t\tfor ( var name in geometry.morphTargets ) {\n\n\t\t\tvar array = [];\n\t\t\tvar morphTargets = geometry.morphTargets[ name ];\n\n\t\t\tfor ( var i = 0, l = morphTargets.length; i < l; i ++ ) {\n\n\t\t\t\tvar morphTarget = morphTargets[ i ];\n\n\t\t\t\tvar attribute = new Float32BufferAttribute( morphTarget.data.length * 3, 3 );\n\t\t\t\tattribute.name = morphTarget.name;\n\n\t\t\t\tarray.push( attribute.copyVector3sArray( morphTarget.data ) );\n\n\t\t\t}\n\n\t\t\tthis.morphAttributes[ name ] = array;\n\n\t\t}\n\n\t\t// skinning\n\n\t\tif ( geometry.skinIndices.length > 0 ) {\n\n\t\t\tvar skinIndices = new Float32BufferAttribute( geometry.skinIndices.length * 4, 4 );\n\t\t\tthis.setAttribute( 'skinIndex', skinIndices.copyVector4sArray( geometry.skinIndices ) );\n\n\t\t}\n\n\t\tif ( geometry.skinWeights.length > 0 ) {\n\n\t\t\tvar skinWeights = new Float32BufferAttribute( geometry.skinWeights.length * 4, 4 );\n\t\t\tthis.setAttribute( 'skinWeight', skinWeights.copyVector4sArray( geometry.skinWeights ) );\n\n\t\t}\n\n\t\t//\n\n\t\tif ( geometry.boundingSphere !== null ) {\n\n\t\t\tthis.boundingSphere = geometry.boundingSphere.clone();\n\n\t\t}\n\n\t\tif ( geometry.boundingBox !== null ) {\n\n\t\t\tthis.boundingBox = geometry.boundingBox.clone();\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tcomputeBoundingBox: function () {\n\n\t\tif ( this.boundingBox === null ) {\n\n\t\t\tthis.boundingBox = new Box3();\n\n\t\t}\n\n\t\tvar position = this.attributes.position;\n\t\tvar morphAttributesPosition = this.morphAttributes.position;\n\n\t\tif ( position !== undefined ) {\n\n\t\t\tthis.boundingBox.setFromBufferAttribute( position );\n\n\t\t\t// process morph attributes if present\n\n\t\t\tif ( morphAttributesPosition ) {\n\n\t\t\t\tfor ( var i = 0, il = morphAttributesPosition.length; i < il; i ++ ) {\n\n\t\t\t\t\tvar morphAttribute = morphAttributesPosition[ i ];\n\t\t\t\t\t_box$2.setFromBufferAttribute( morphAttribute );\n\n\t\t\t\t\tif ( this.morphTargetsRelative ) {\n\n\t\t\t\t\t\t_vector$4.addVectors( this.boundingBox.min, _box$2.min );\n\t\t\t\t\t\tthis.boundingBox.expandByPoint( _vector$4 );\n\n\t\t\t\t\t\t_vector$4.addVectors( this.boundingBox.max, _box$2.max );\n\t\t\t\t\t\tthis.boundingBox.expandByPoint( _vector$4 );\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\tthis.boundingBox.expandByPoint( _box$2.min );\n\t\t\t\t\t\tthis.boundingBox.expandByPoint( _box$2.max );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\tthis.boundingBox.makeEmpty();\n\n\t\t}\n\n\t\tif ( isNaN( this.boundingBox.min.x ) || isNaN( this.boundingBox.min.y ) || isNaN( this.boundingBox.min.z ) ) {\n\n\t\t\tconsole.error( 'THREE.BufferGeometry.computeBoundingBox: Computed min/max have NaN values. The \"position\" attribute is likely to have NaN values.', this );\n\n\t\t}\n\n\t},\n\n\tcomputeBoundingSphere: function () {\n\n\t\tif ( this.boundingSphere === null ) {\n\n\t\t\tthis.boundingSphere = new Sphere();\n\n\t\t}\n\n\t\tvar position = this.attributes.position;\n\t\tvar morphAttributesPosition = this.morphAttributes.position;\n\n\t\tif ( position ) {\n\n\t\t\t// first, find the center of the bounding sphere\n\n\t\t\tvar center = this.boundingSphere.center;\n\n\t\t\t_box$2.setFromBufferAttribute( position );\n\n\t\t\t// process morph attributes if present\n\n\t\t\tif ( morphAttributesPosition ) {\n\n\t\t\t\tfor ( var i = 0, il = morphAttributesPosition.length; i < il; i ++ ) {\n\n\t\t\t\t\tvar morphAttribute = morphAttributesPosition[ i ];\n\t\t\t\t\t_boxMorphTargets.setFromBufferAttribute( morphAttribute );\n\n\t\t\t\t\tif ( this.morphTargetsRelative ) {\n\n\t\t\t\t\t\t_vector$4.addVectors( _box$2.min, _boxMorphTargets.min );\n\t\t\t\t\t\t_box$2.expandByPoint( _vector$4 );\n\n\t\t\t\t\t\t_vector$4.addVectors( _box$2.max, _boxMorphTargets.max );\n\t\t\t\t\t\t_box$2.expandByPoint( _vector$4 );\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\t_box$2.expandByPoint( _boxMorphTargets.min );\n\t\t\t\t\t\t_box$2.expandByPoint( _boxMorphTargets.max );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\t_box$2.getCenter( center );\n\n\t\t\t// second, try to find a boundingSphere with a radius smaller than the\n\t\t\t// boundingSphere of the boundingBox: sqrt(3) smaller in the best case\n\n\t\t\tvar maxRadiusSq = 0;\n\n\t\t\tfor ( var i = 0, il = position.count; i < il; i ++ ) {\n\n\t\t\t\t_vector$4.fromBufferAttribute( position, i );\n\n\t\t\t\tmaxRadiusSq = Math.max( maxRadiusSq, center.distanceToSquared( _vector$4 ) );\n\n\t\t\t}\n\n\t\t\t// process morph attributes if present\n\n\t\t\tif ( morphAttributesPosition ) {\n\n\t\t\t\tfor ( var i = 0, il = morphAttributesPosition.length; i < il; i ++ ) {\n\n\t\t\t\t\tvar morphAttribute = morphAttributesPosition[ i ];\n\t\t\t\t\tvar morphTargetsRelative = this.morphTargetsRelative;\n\n\t\t\t\t\tfor ( var j = 0, jl = morphAttribute.count; j < jl; j ++ ) {\n\n\t\t\t\t\t\t_vector$4.fromBufferAttribute( morphAttribute, j );\n\n\t\t\t\t\t\tif ( morphTargetsRelative ) {\n\n\t\t\t\t\t\t\t_offset.fromBufferAttribute( position, j );\n\t\t\t\t\t\t\t_vector$4.add( _offset );\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tmaxRadiusSq = Math.max( maxRadiusSq, center.distanceToSquared( _vector$4 ) );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tthis.boundingSphere.radius = Math.sqrt( maxRadiusSq );\n\n\t\t\tif ( isNaN( this.boundingSphere.radius ) ) {\n\n\t\t\t\tconsole.error( 'THREE.BufferGeometry.computeBoundingSphere(): Computed radius is NaN. The \"position\" attribute is likely to have NaN values.', this );\n\n\t\t\t}\n\n\t\t}\n\n\t},\n\n\tcomputeFaceNormals: function () {\n\n\t\t// backwards compatibility\n\n\t},\n\n\tcomputeVertexNormals: function () {\n\n\t\tvar index = this.index;\n\t\tvar attributes = this.attributes;\n\n\t\tif ( attributes.position ) {\n\n\t\t\tvar positions = attributes.position.array;\n\n\t\t\tif ( attributes.normal === undefined ) {\n\n\t\t\t\tthis.setAttribute( 'normal', new BufferAttribute( new Float32Array( positions.length ), 3 ) );\n\n\t\t\t} else {\n\n\t\t\t\t// reset existing normals to zero\n\n\t\t\t\tvar array = attributes.normal.array;\n\n\t\t\t\tfor ( var i = 0, il = array.length; i < il; i ++ ) {\n\n\t\t\t\t\tarray[ i ] = 0;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tvar normals = attributes.normal.array;\n\n\t\t\tvar vA, vB, vC;\n\t\t\tvar pA = new Vector3(), pB = new Vector3(), pC = new Vector3();\n\t\t\tvar cb = new Vector3(), ab = new Vector3();\n\n\t\t\t// indexed elements\n\n\t\t\tif ( index ) {\n\n\t\t\t\tvar indices = index.array;\n\n\t\t\t\tfor ( var i = 0, il = index.count; i < il; i += 3 ) {\n\n\t\t\t\t\tvA = indices[ i + 0 ] * 3;\n\t\t\t\t\tvB = indices[ i + 1 ] * 3;\n\t\t\t\t\tvC = indices[ i + 2 ] * 3;\n\n\t\t\t\t\tpA.fromArray( positions, vA );\n\t\t\t\t\tpB.fromArray( positions, vB );\n\t\t\t\t\tpC.fromArray( positions, vC );\n\n\t\t\t\t\tcb.subVectors( pC, pB );\n\t\t\t\t\tab.subVectors( pA, pB );\n\t\t\t\t\tcb.cross( ab );\n\n\t\t\t\t\tnormals[ vA ] += cb.x;\n\t\t\t\t\tnormals[ vA + 1 ] += cb.y;\n\t\t\t\t\tnormals[ vA + 2 ] += cb.z;\n\n\t\t\t\t\tnormals[ vB ] += cb.x;\n\t\t\t\t\tnormals[ vB + 1 ] += cb.y;\n\t\t\t\t\tnormals[ vB + 2 ] += cb.z;\n\n\t\t\t\t\tnormals[ vC ] += cb.x;\n\t\t\t\t\tnormals[ vC + 1 ] += cb.y;\n\t\t\t\t\tnormals[ vC + 2 ] += cb.z;\n\n\t\t\t\t}\n\n\t\t\t} else {\n\n\t\t\t\t// non-indexed elements (unconnected triangle soup)\n\n\t\t\t\tfor ( var i = 0, il = positions.length; i < il; i += 9 ) {\n\n\t\t\t\t\tpA.fromArray( positions, i );\n\t\t\t\t\tpB.fromArray( positions, i + 3 );\n\t\t\t\t\tpC.fromArray( positions, i + 6 );\n\n\t\t\t\t\tcb.subVectors( pC, pB );\n\t\t\t\t\tab.subVectors( pA, pB );\n\t\t\t\t\tcb.cross( ab );\n\n\t\t\t\t\tnormals[ i ] = cb.x;\n\t\t\t\t\tnormals[ i + 1 ] = cb.y;\n\t\t\t\t\tnormals[ i + 2 ] = cb.z;\n\n\t\t\t\t\tnormals[ i + 3 ] = cb.x;\n\t\t\t\t\tnormals[ i + 4 ] = cb.y;\n\t\t\t\t\tnormals[ i + 5 ] = cb.z;\n\n\t\t\t\t\tnormals[ i + 6 ] = cb.x;\n\t\t\t\t\tnormals[ i + 7 ] = cb.y;\n\t\t\t\t\tnormals[ i + 8 ] = cb.z;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tthis.normalizeNormals();\n\n\t\t\tattributes.normal.needsUpdate = true;\n\n\t\t}\n\n\t},\n\n\tmerge: function ( geometry, offset ) {\n\n\t\tif ( ! ( geometry && geometry.isBufferGeometry ) ) {\n\n\t\t\tconsole.error( 'THREE.BufferGeometry.merge(): geometry not an instance of THREE.BufferGeometry.', geometry );\n\t\t\treturn;\n\n\t\t}\n\n\t\tif ( offset === undefined ) {\n\n\t\t\toffset = 0;\n\n\t\t\tconsole.warn(\n\t\t\t\t'THREE.BufferGeometry.merge(): Overwriting original geometry, starting at offset=0. '\n\t\t\t\t+ 'Use BufferGeometryUtils.mergeBufferGeometries() for lossless merge.'\n\t\t\t);\n\n\t\t}\n\n\t\tvar attributes = this.attributes;\n\n\t\tfor ( var key in attributes ) {\n\n\t\t\tif ( geometry.attributes[ key ] === undefined ) continue;\n\n\t\t\tvar attribute1 = attributes[ key ];\n\t\t\tvar attributeArray1 = attribute1.array;\n\n\t\t\tvar attribute2 = geometry.attributes[ key ];\n\t\t\tvar attributeArray2 = attribute2.array;\n\n\t\t\tvar attributeOffset = attribute2.itemSize * offset;\n\t\t\tvar length = Math.min( attributeArray2.length, attributeArray1.length - attributeOffset );\n\n\t\t\tfor ( var i = 0, j = attributeOffset; i < length; i ++, j ++ ) {\n\n\t\t\t\tattributeArray1[ j ] = attributeArray2[ i ];\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tnormalizeNormals: function () {\n\n\t\tvar normals = this.attributes.normal;\n\n\t\tfor ( var i = 0, il = normals.count; i < il; i ++ ) {\n\n\t\t\t_vector$4.x = normals.getX( i );\n\t\t\t_vector$4.y = normals.getY( i );\n\t\t\t_vector$4.z = normals.getZ( i );\n\n\t\t\t_vector$4.normalize();\n\n\t\t\tnormals.setXYZ( i, _vector$4.x, _vector$4.y, _vector$4.z );\n\n\t\t}\n\n\t},\n\n\ttoNonIndexed: function () {\n\n\t\tfunction convertBufferAttribute( attribute, indices ) {\n\n\t\t\tvar array = attribute.array;\n\t\t\tvar itemSize = attribute.itemSize;\n\n\t\t\tvar array2 = new array.constructor( indices.length * itemSize );\n\n\t\t\tvar index = 0, index2 = 0;\n\n\t\t\tfor ( var i = 0, l = indices.length; i < l; i ++ ) {\n\n\t\t\t\tindex = indices[ i ] * itemSize;\n\n\t\t\t\tfor ( var j = 0; j < itemSize; j ++ ) {\n\n\t\t\t\t\tarray2[ index2 ++ ] = array[ index ++ ];\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\treturn new BufferAttribute( array2, itemSize );\n\n\t\t}\n\n\t\t//\n\n\t\tif ( this.index === null ) {\n\n\t\t\tconsole.warn( 'THREE.BufferGeometry.toNonIndexed(): Geometry is already non-indexed.' );\n\t\t\treturn this;\n\n\t\t}\n\n\t\tvar geometry2 = new BufferGeometry();\n\n\t\tvar indices = this.index.array;\n\t\tvar attributes = this.attributes;\n\n\t\t// attributes\n\n\t\tfor ( var name in attributes ) {\n\n\t\t\tvar attribute = attributes[ name ];\n\n\t\t\tvar newAttribute = convertBufferAttribute( attribute, indices );\n\n\t\t\tgeometry2.setAttribute( name, newAttribute );\n\n\t\t}\n\n\t\t// morph attributes\n\n\t\tvar morphAttributes = this.morphAttributes;\n\n\t\tfor ( name in morphAttributes ) {\n\n\t\t\tvar morphArray = [];\n\t\t\tvar morphAttribute = morphAttributes[ name ]; // morphAttribute: array of Float32BufferAttributes\n\n\t\t\tfor ( var i = 0, il = morphAttribute.length; i < il; i ++ ) {\n\n\t\t\t\tvar attribute = morphAttribute[ i ];\n\n\t\t\t\tvar newAttribute = convertBufferAttribute( attribute, indices );\n\n\t\t\t\tmorphArray.push( newAttribute );\n\n\t\t\t}\n\n\t\t\tgeometry2.morphAttributes[ name ] = morphArray;\n\n\t\t}\n\n\t\tgeometry2.morphTargetsRelative = this.morphTargetsRelative;\n\n\t\t// groups\n\n\t\tvar groups = this.groups;\n\n\t\tfor ( var i = 0, l = groups.length; i < l; i ++ ) {\n\n\t\t\tvar group = groups[ i ];\n\t\t\tgeometry2.addGroup( group.start, group.count, group.materialIndex );\n\n\t\t}\n\n\t\treturn geometry2;\n\n\t},\n\n\ttoJSON: function () {\n\n\t\tvar data = {\n\t\t\tmetadata: {\n\t\t\t\tversion: 4.5,\n\t\t\t\ttype: 'BufferGeometry',\n\t\t\t\tgenerator: 'BufferGeometry.toJSON'\n\t\t\t}\n\t\t};\n\n\t\t// standard BufferGeometry serialization\n\n\t\tdata.uuid = this.uuid;\n\t\tdata.type = this.type;\n\t\tif ( this.name !== '' ) data.name = this.name;\n\t\tif ( Object.keys( this.userData ).length > 0 ) data.userData = this.userData;\n\n\t\tif ( this.parameters !== undefined ) {\n\n\t\t\tvar parameters = this.parameters;\n\n\t\t\tfor ( var key in parameters ) {\n\n\t\t\t\tif ( parameters[ key ] !== undefined ) data[ key ] = parameters[ key ];\n\n\t\t\t}\n\n\t\t\treturn data;\n\n\t\t}\n\n\t\tdata.data = { attributes: {} };\n\n\t\tvar index = this.index;\n\n\t\tif ( index !== null ) {\n\n\t\t\tdata.data.index = {\n\t\t\t\ttype: index.array.constructor.name,\n\t\t\t\tarray: Array.prototype.slice.call( index.array )\n\t\t\t};\n\n\t\t}\n\n\t\tvar attributes = this.attributes;\n\n\t\tfor ( var key in attributes ) {\n\n\t\t\tvar attribute = attributes[ key ];\n\n\t\t\tvar attributeData = attribute.toJSON();\n\n\t\t\tif ( attribute.name !== '' ) attributeData.name = attribute.name;\n\n\t\t\tdata.data.attributes[ key ] = attributeData;\n\n\t\t}\n\n\t\tvar morphAttributes = {};\n\t\tvar hasMorphAttributes = false;\n\n\t\tfor ( var key in this.morphAttributes ) {\n\n\t\t\tvar attributeArray = this.morphAttributes[ key ];\n\n\t\t\tvar array = [];\n\n\t\t\tfor ( var i = 0, il = attributeArray.length; i < il; i ++ ) {\n\n\t\t\t\tvar attribute = attributeArray[ i ];\n\n\t\t\t\tvar attributeData = attribute.toJSON();\n\n\t\t\t\tif ( attribute.name !== '' ) attributeData.name = attribute.name;\n\n\t\t\t\tarray.push( attributeData );\n\n\t\t\t}\n\n\t\t\tif ( array.length > 0 ) {\n\n\t\t\t\tmorphAttributes[ key ] = array;\n\n\t\t\t\thasMorphAttributes = true;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( hasMorphAttributes ) {\n\n\t\t\tdata.data.morphAttributes = morphAttributes;\n\t\t\tdata.data.morphTargetsRelative = this.morphTargetsRelative;\n\n\t\t}\n\n\t\tvar groups = this.groups;\n\n\t\tif ( groups.length > 0 ) {\n\n\t\t\tdata.data.groups = JSON.parse( JSON.stringify( groups ) );\n\n\t\t}\n\n\t\tvar boundingSphere = this.boundingSphere;\n\n\t\tif ( boundingSphere !== null ) {\n\n\t\t\tdata.data.boundingSphere = {\n\t\t\t\tcenter: boundingSphere.center.toArray(),\n\t\t\t\tradius: boundingSphere.radius\n\t\t\t};\n\n\t\t}\n\n\t\treturn data;\n\n\t},\n\n\tclone: function () {\n\n\t\t/*\n\t\t // Handle primitives\n\n\t\t var parameters = this.parameters;\n\n\t\t if ( parameters !== undefined ) {\n\n\t\t var values = [];\n\n\t\t for ( var key in parameters ) {\n\n\t\t values.push( parameters[ key ] );\n\n\t\t }\n\n\t\t var geometry = Object.create( this.constructor.prototype );\n\t\t this.constructor.apply( geometry, values );\n\t\t return geometry;\n\n\t\t }\n\n\t\t return new this.constructor().copy( this );\n\t\t */\n\n\t\treturn new BufferGeometry().copy( this );\n\n\t},\n\n\tcopy: function ( source ) {\n\n\t\tvar name, i, l;\n\n\t\t// reset\n\n\t\tthis.index = null;\n\t\tthis.attributes = {};\n\t\tthis.morphAttributes = {};\n\t\tthis.groups = [];\n\t\tthis.boundingBox = null;\n\t\tthis.boundingSphere = null;\n\n\t\t// name\n\n\t\tthis.name = source.name;\n\n\t\t// index\n\n\t\tvar index = source.index;\n\n\t\tif ( index !== null ) {\n\n\t\t\tthis.setIndex( index.clone() );\n\n\t\t}\n\n\t\t// attributes\n\n\t\tvar attributes = source.attributes;\n\n\t\tfor ( name in attributes ) {\n\n\t\t\tvar attribute = attributes[ name ];\n\t\t\tthis.setAttribute( name, attribute.clone() );\n\n\t\t}\n\n\t\t// morph attributes\n\n\t\tvar morphAttributes = source.morphAttributes;\n\n\t\tfor ( name in morphAttributes ) {\n\n\t\t\tvar array = [];\n\t\t\tvar morphAttribute = morphAttributes[ name ]; // morphAttribute: array of Float32BufferAttributes\n\n\t\t\tfor ( i = 0, l = morphAttribute.length; i < l; i ++ ) {\n\n\t\t\t\tarray.push( morphAttribute[ i ].clone() );\n\n\t\t\t}\n\n\t\t\tthis.morphAttributes[ name ] = array;\n\n\t\t}\n\n\t\tthis.morphTargetsRelative = source.morphTargetsRelative;\n\n\t\t// groups\n\n\t\tvar groups = source.groups;\n\n\t\tfor ( i = 0, l = groups.length; i < l; i ++ ) {\n\n\t\t\tvar group = groups[ i ];\n\t\t\tthis.addGroup( group.start, group.count, group.materialIndex );\n\n\t\t}\n\n\t\t// bounding box\n\n\t\tvar boundingBox = source.boundingBox;\n\n\t\tif ( boundingBox !== null ) {\n\n\t\t\tthis.boundingBox = boundingBox.clone();\n\n\t\t}\n\n\t\t// bounding sphere\n\n\t\tvar boundingSphere = source.boundingSphere;\n\n\t\tif ( boundingSphere !== null ) {\n\n\t\t\tthis.boundingSphere = boundingSphere.clone();\n\n\t\t}\n\n\t\t// draw range\n\n\t\tthis.drawRange.start = source.drawRange.start;\n\t\tthis.drawRange.count = source.drawRange.count;\n\n\t\t// user data\n\n\t\tthis.userData = source.userData;\n\n\t\treturn this;\n\n\t},\n\n\tdispose: function () {\n\n\t\tthis.dispatchEvent( { type: 'dispose' } );\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n * @author mikael emtinger / http://gomo.se/\n * @author jonobr1 / http://jonobr1.com/\n */\n\nvar _inverseMatrix = new Matrix4();\nvar _ray = new Ray();\nvar _sphere = new Sphere();\n\nvar _vA = new Vector3();\nvar _vB = new Vector3();\nvar _vC = new Vector3();\n\nvar _tempA = new Vector3();\nvar _tempB = new Vector3();\nvar _tempC = new Vector3();\n\nvar _morphA = new Vector3();\nvar _morphB = new Vector3();\nvar _morphC = new Vector3();\n\nvar _uvA = new Vector2();\nvar _uvB = new Vector2();\nvar _uvC = new Vector2();\n\nvar _intersectionPoint = new Vector3();\nvar _intersectionPointWorld = new Vector3();\n\nfunction Mesh( geometry, material ) {\n\n\tObject3D.call( this );\n\n\tthis.type = 'Mesh';\n\n\tthis.geometry = geometry !== undefined ? geometry : new BufferGeometry();\n\tthis.material = material !== undefined ? material : new MeshBasicMaterial();\n\n\tthis.updateMorphTargets();\n\n}\n\nMesh.prototype = Object.assign( Object.create( Object3D.prototype ), {\n\n\tconstructor: Mesh,\n\n\tisMesh: true,\n\n\tcopy: function ( source ) {\n\n\t\tObject3D.prototype.copy.call( this, source );\n\n\t\tif ( source.morphTargetInfluences !== undefined ) {\n\n\t\t\tthis.morphTargetInfluences = source.morphTargetInfluences.slice();\n\n\t\t}\n\n\t\tif ( source.morphTargetDictionary !== undefined ) {\n\n\t\t\tthis.morphTargetDictionary = Object.assign( {}, source.morphTargetDictionary );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tupdateMorphTargets: function () {\n\n\t\tvar geometry = this.geometry;\n\t\tvar m, ml, name;\n\n\t\tif ( geometry.isBufferGeometry ) {\n\n\t\t\tvar morphAttributes = geometry.morphAttributes;\n\t\t\tvar keys = Object.keys( morphAttributes );\n\n\t\t\tif ( keys.length > 0 ) {\n\n\t\t\t\tvar morphAttribute = morphAttributes[ keys[ 0 ] ];\n\n\t\t\t\tif ( morphAttribute !== undefined ) {\n\n\t\t\t\t\tthis.morphTargetInfluences = [];\n\t\t\t\t\tthis.morphTargetDictionary = {};\n\n\t\t\t\t\tfor ( m = 0, ml = morphAttribute.length; m < ml; m ++ ) {\n\n\t\t\t\t\t\tname = morphAttribute[ m ].name || String( m );\n\n\t\t\t\t\t\tthis.morphTargetInfluences.push( 0 );\n\t\t\t\t\t\tthis.morphTargetDictionary[ name ] = m;\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\tvar morphTargets = geometry.morphTargets;\n\n\t\t\tif ( morphTargets !== undefined && morphTargets.length > 0 ) {\n\n\t\t\t\tconsole.error( 'THREE.Mesh.updateMorphTargets() no longer supports THREE.Geometry. Use THREE.BufferGeometry instead.' );\n\n\t\t\t}\n\n\t\t}\n\n\t},\n\n\traycast: function ( raycaster, intersects ) {\n\n\t\tvar geometry = this.geometry;\n\t\tvar material = this.material;\n\t\tvar matrixWorld = this.matrixWorld;\n\n\t\tif ( material === undefined ) return;\n\n\t\t// Checking boundingSphere distance to ray\n\n\t\tif ( geometry.boundingSphere === null ) geometry.computeBoundingSphere();\n\n\t\t_sphere.copy( geometry.boundingSphere );\n\t\t_sphere.applyMatrix4( matrixWorld );\n\n\t\tif ( raycaster.ray.intersectsSphere( _sphere ) === false ) return;\n\n\t\t//\n\n\t\t_inverseMatrix.getInverse( matrixWorld );\n\t\t_ray.copy( raycaster.ray ).applyMatrix4( _inverseMatrix );\n\n\t\t// Check boundingBox before continuing\n\n\t\tif ( geometry.boundingBox !== null ) {\n\n\t\t\tif ( _ray.intersectsBox( geometry.boundingBox ) === false ) return;\n\n\t\t}\n\n\t\tvar intersection;\n\n\t\tif ( geometry.isBufferGeometry ) {\n\n\t\t\tvar a, b, c;\n\t\t\tvar index = geometry.index;\n\t\t\tvar position = geometry.attributes.position;\n\t\t\tvar morphPosition = geometry.morphAttributes.position;\n\t\t\tvar morphTargetsRelative = geometry.morphTargetsRelative;\n\t\t\tvar uv = geometry.attributes.uv;\n\t\t\tvar uv2 = geometry.attributes.uv2;\n\t\t\tvar groups = geometry.groups;\n\t\t\tvar drawRange = geometry.drawRange;\n\t\t\tvar i, j, il, jl;\n\t\t\tvar group, groupMaterial;\n\t\t\tvar start, end;\n\n\t\t\tif ( index !== null ) {\n\n\t\t\t\t// indexed buffer geometry\n\n\t\t\t\tif ( Array.isArray( material ) ) {\n\n\t\t\t\t\tfor ( i = 0, il = groups.length; i < il; i ++ ) {\n\n\t\t\t\t\t\tgroup = groups[ i ];\n\t\t\t\t\t\tgroupMaterial = material[ group.materialIndex ];\n\n\t\t\t\t\t\tstart = Math.max( group.start, drawRange.start );\n\t\t\t\t\t\tend = Math.min( ( group.start + group.count ), ( drawRange.start + drawRange.count ) );\n\n\t\t\t\t\t\tfor ( j = start, jl = end; j < jl; j += 3 ) {\n\n\t\t\t\t\t\t\ta = index.getX( j );\n\t\t\t\t\t\t\tb = index.getX( j + 1 );\n\t\t\t\t\t\t\tc = index.getX( j + 2 );\n\n\t\t\t\t\t\t\tintersection = checkBufferGeometryIntersection( this, groupMaterial, raycaster, _ray, position, morphPosition, morphTargetsRelative, uv, uv2, a, b, c );\n\n\t\t\t\t\t\t\tif ( intersection ) {\n\n\t\t\t\t\t\t\t\tintersection.faceIndex = Math.floor( j / 3 ); // triangle number in indexed buffer semantics\n\t\t\t\t\t\t\t\tintersection.face.materialIndex = group.materialIndex;\n\t\t\t\t\t\t\t\tintersects.push( intersection );\n\n\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t} else {\n\n\t\t\t\t\tstart = Math.max( 0, drawRange.start );\n\t\t\t\t\tend = Math.min( index.count, ( drawRange.start + drawRange.count ) );\n\n\t\t\t\t\tfor ( i = start, il = end; i < il; i += 3 ) {\n\n\t\t\t\t\t\ta = index.getX( i );\n\t\t\t\t\t\tb = index.getX( i + 1 );\n\t\t\t\t\t\tc = index.getX( i + 2 );\n\n\t\t\t\t\t\tintersection = checkBufferGeometryIntersection( this, material, raycaster, _ray, position, morphPosition, morphTargetsRelative, uv, uv2, a, b, c );\n\n\t\t\t\t\t\tif ( intersection ) {\n\n\t\t\t\t\t\t\tintersection.faceIndex = Math.floor( i / 3 ); // triangle number in indexed buffer semantics\n\t\t\t\t\t\t\tintersects.push( intersection );\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t} else if ( position !== undefined ) {\n\n\t\t\t\t// non-indexed buffer geometry\n\n\t\t\t\tif ( Array.isArray( material ) ) {\n\n\t\t\t\t\tfor ( i = 0, il = groups.length; i < il; i ++ ) {\n\n\t\t\t\t\t\tgroup = groups[ i ];\n\t\t\t\t\t\tgroupMaterial = material[ group.materialIndex ];\n\n\t\t\t\t\t\tstart = Math.max( group.start, drawRange.start );\n\t\t\t\t\t\tend = Math.min( ( group.start + group.count ), ( drawRange.start + drawRange.count ) );\n\n\t\t\t\t\t\tfor ( j = start, jl = end; j < jl; j += 3 ) {\n\n\t\t\t\t\t\t\ta = j;\n\t\t\t\t\t\t\tb = j + 1;\n\t\t\t\t\t\t\tc = j + 2;\n\n\t\t\t\t\t\t\tintersection = checkBufferGeometryIntersection( this, groupMaterial, raycaster, _ray, position, morphPosition, morphTargetsRelative, uv, uv2, a, b, c );\n\n\t\t\t\t\t\t\tif ( intersection ) {\n\n\t\t\t\t\t\t\t\tintersection.faceIndex = Math.floor( j / 3 ); // triangle number in non-indexed buffer semantics\n\t\t\t\t\t\t\t\tintersection.face.materialIndex = group.materialIndex;\n\t\t\t\t\t\t\t\tintersects.push( intersection );\n\n\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t} else {\n\n\t\t\t\t\tstart = Math.max( 0, drawRange.start );\n\t\t\t\t\tend = Math.min( position.count, ( drawRange.start + drawRange.count ) );\n\n\t\t\t\t\tfor ( i = start, il = end; i < il; i += 3 ) {\n\n\t\t\t\t\t\ta = i;\n\t\t\t\t\t\tb = i + 1;\n\t\t\t\t\t\tc = i + 2;\n\n\t\t\t\t\t\tintersection = checkBufferGeometryIntersection( this, material, raycaster, _ray, position, morphPosition, morphTargetsRelative, uv, uv2, a, b, c );\n\n\t\t\t\t\t\tif ( intersection ) {\n\n\t\t\t\t\t\t\tintersection.faceIndex = Math.floor( i / 3 ); // triangle number in non-indexed buffer semantics\n\t\t\t\t\t\t\tintersects.push( intersection );\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t} else if ( geometry.isGeometry ) {\n\n\t\t\tvar fvA, fvB, fvC;\n\t\t\tvar isMultiMaterial = Array.isArray( material );\n\n\t\t\tvar vertices = geometry.vertices;\n\t\t\tvar faces = geometry.faces;\n\t\t\tvar uvs;\n\n\t\t\tvar faceVertexUvs = geometry.faceVertexUvs[ 0 ];\n\t\t\tif ( faceVertexUvs.length > 0 ) uvs = faceVertexUvs;\n\n\t\t\tfor ( var f = 0, fl = faces.length; f < fl; f ++ ) {\n\n\t\t\t\tvar face = faces[ f ];\n\t\t\t\tvar faceMaterial = isMultiMaterial ? material[ face.materialIndex ] : material;\n\n\t\t\t\tif ( faceMaterial === undefined ) continue;\n\n\t\t\t\tfvA = vertices[ face.a ];\n\t\t\t\tfvB = vertices[ face.b ];\n\t\t\t\tfvC = vertices[ face.c ];\n\n\t\t\t\tintersection = checkIntersection( this, faceMaterial, raycaster, _ray, fvA, fvB, fvC, _intersectionPoint );\n\n\t\t\t\tif ( intersection ) {\n\n\t\t\t\t\tif ( uvs && uvs[ f ] ) {\n\n\t\t\t\t\t\tvar uvs_f = uvs[ f ];\n\t\t\t\t\t\t_uvA.copy( uvs_f[ 0 ] );\n\t\t\t\t\t\t_uvB.copy( uvs_f[ 1 ] );\n\t\t\t\t\t\t_uvC.copy( uvs_f[ 2 ] );\n\n\t\t\t\t\t\tintersection.uv = Triangle.getUV( _intersectionPoint, fvA, fvB, fvC, _uvA, _uvB, _uvC, new Vector2() );\n\n\t\t\t\t\t}\n\n\t\t\t\t\tintersection.face = face;\n\t\t\t\t\tintersection.faceIndex = f;\n\t\t\t\t\tintersects.push( intersection );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor( this.geometry, this.material ).copy( this );\n\n\t}\n\n} );\n\nfunction checkIntersection( object, material, raycaster, ray, pA, pB, pC, point ) {\n\n\tvar intersect;\n\n\tif ( material.side === BackSide ) {\n\n\t\tintersect = ray.intersectTriangle( pC, pB, pA, true, point );\n\n\t} else {\n\n\t\tintersect = ray.intersectTriangle( pA, pB, pC, material.side !== DoubleSide, point );\n\n\t}\n\n\tif ( intersect === null ) return null;\n\n\t_intersectionPointWorld.copy( point );\n\t_intersectionPointWorld.applyMatrix4( object.matrixWorld );\n\n\tvar distance = raycaster.ray.origin.distanceTo( _intersectionPointWorld );\n\n\tif ( distance < raycaster.near || distance > raycaster.far ) return null;\n\n\treturn {\n\t\tdistance: distance,\n\t\tpoint: _intersectionPointWorld.clone(),\n\t\tobject: object\n\t};\n\n}\n\nfunction checkBufferGeometryIntersection( object, material, raycaster, ray, position, morphPosition, morphTargetsRelative, uv, uv2, a, b, c ) {\n\n\t_vA.fromBufferAttribute( position, a );\n\t_vB.fromBufferAttribute( position, b );\n\t_vC.fromBufferAttribute( position, c );\n\n\tvar morphInfluences = object.morphTargetInfluences;\n\n\tif ( material.morphTargets && morphPosition && morphInfluences ) {\n\n\t\t_morphA.set( 0, 0, 0 );\n\t\t_morphB.set( 0, 0, 0 );\n\t\t_morphC.set( 0, 0, 0 );\n\n\t\tfor ( var i = 0, il = morphPosition.length; i < il; i ++ ) {\n\n\t\t\tvar influence = morphInfluences[ i ];\n\t\t\tvar morphAttribute = morphPosition[ i ];\n\n\t\t\tif ( influence === 0 ) continue;\n\n\t\t\t_tempA.fromBufferAttribute( morphAttribute, a );\n\t\t\t_tempB.fromBufferAttribute( morphAttribute, b );\n\t\t\t_tempC.fromBufferAttribute( morphAttribute, c );\n\n\t\t\tif ( morphTargetsRelative ) {\n\n\t\t\t\t_morphA.addScaledVector( _tempA, influence );\n\t\t\t\t_morphB.addScaledVector( _tempB, influence );\n\t\t\t\t_morphC.addScaledVector( _tempC, influence );\n\n\t\t\t} else {\n\n\t\t\t\t_morphA.addScaledVector( _tempA.sub( _vA ), influence );\n\t\t\t\t_morphB.addScaledVector( _tempB.sub( _vB ), influence );\n\t\t\t\t_morphC.addScaledVector( _tempC.sub( _vC ), influence );\n\n\t\t\t}\n\n\t\t}\n\n\t\t_vA.add( _morphA );\n\t\t_vB.add( _morphB );\n\t\t_vC.add( _morphC );\n\n\t}\n\n\tvar intersection = checkIntersection( object, material, raycaster, ray, _vA, _vB, _vC, _intersectionPoint );\n\n\tif ( intersection ) {\n\n\t\tif ( uv ) {\n\n\t\t\t_uvA.fromBufferAttribute( uv, a );\n\t\t\t_uvB.fromBufferAttribute( uv, b );\n\t\t\t_uvC.fromBufferAttribute( uv, c );\n\n\t\t\tintersection.uv = Triangle.getUV( _intersectionPoint, _vA, _vB, _vC, _uvA, _uvB, _uvC, new Vector2() );\n\n\t\t}\n\n\t\tif ( uv2 ) {\n\n\t\t\t_uvA.fromBufferAttribute( uv2, a );\n\t\t\t_uvB.fromBufferAttribute( uv2, b );\n\t\t\t_uvC.fromBufferAttribute( uv2, c );\n\n\t\t\tintersection.uv2 = Triangle.getUV( _intersectionPoint, _vA, _vB, _vC, _uvA, _uvB, _uvC, new Vector2() );\n\n\t\t}\n\n\t\tvar face = new Face3( a, b, c );\n\t\tTriangle.getNormal( _vA, _vB, _vC, face.normal );\n\n\t\tintersection.face = face;\n\n\t}\n\n\treturn intersection;\n\n}\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author kile / http://kile.stravaganza.org/\n * @author alteredq / http://alteredqualia.com/\n * @author mikael emtinger / http://gomo.se/\n * @author zz85 / http://www.lab4games.net/zz85/blog\n * @author bhouston / http://clara.io\n */\n\nvar _geometryId = 0; // Geometry uses even numbers as Id\nvar _m1$3 = new Matrix4();\nvar _obj$1 = new Object3D();\nvar _offset$1 = new Vector3();\n\nfunction Geometry() {\n\n\tObject.defineProperty( this, 'id', { value: _geometryId += 2 } );\n\n\tthis.uuid = MathUtils.generateUUID();\n\n\tthis.name = '';\n\tthis.type = 'Geometry';\n\n\tthis.vertices = [];\n\tthis.colors = [];\n\tthis.faces = [];\n\tthis.faceVertexUvs = [[]];\n\n\tthis.morphTargets = [];\n\tthis.morphNormals = [];\n\n\tthis.skinWeights = [];\n\tthis.skinIndices = [];\n\n\tthis.lineDistances = [];\n\n\tthis.boundingBox = null;\n\tthis.boundingSphere = null;\n\n\t// update flags\n\n\tthis.elementsNeedUpdate = false;\n\tthis.verticesNeedUpdate = false;\n\tthis.uvsNeedUpdate = false;\n\tthis.normalsNeedUpdate = false;\n\tthis.colorsNeedUpdate = false;\n\tthis.lineDistancesNeedUpdate = false;\n\tthis.groupsNeedUpdate = false;\n\n}\n\nGeometry.prototype = Object.assign( Object.create( EventDispatcher.prototype ), {\n\n\tconstructor: Geometry,\n\n\tisGeometry: true,\n\n\tapplyMatrix4: function ( matrix ) {\n\n\t\tvar normalMatrix = new Matrix3().getNormalMatrix( matrix );\n\n\t\tfor ( var i = 0, il = this.vertices.length; i < il; i ++ ) {\n\n\t\t\tvar vertex = this.vertices[ i ];\n\t\t\tvertex.applyMatrix4( matrix );\n\n\t\t}\n\n\t\tfor ( var i = 0, il = this.faces.length; i < il; i ++ ) {\n\n\t\t\tvar face = this.faces[ i ];\n\t\t\tface.normal.applyMatrix3( normalMatrix ).normalize();\n\n\t\t\tfor ( var j = 0, jl = face.vertexNormals.length; j < jl; j ++ ) {\n\n\t\t\t\tface.vertexNormals[ j ].applyMatrix3( normalMatrix ).normalize();\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( this.boundingBox !== null ) {\n\n\t\t\tthis.computeBoundingBox();\n\n\t\t}\n\n\t\tif ( this.boundingSphere !== null ) {\n\n\t\t\tthis.computeBoundingSphere();\n\n\t\t}\n\n\t\tthis.verticesNeedUpdate = true;\n\t\tthis.normalsNeedUpdate = true;\n\n\t\treturn this;\n\n\t},\n\n\trotateX: function ( angle ) {\n\n\t\t// rotate geometry around world x-axis\n\n\t\t_m1$3.makeRotationX( angle );\n\n\t\tthis.applyMatrix4( _m1$3 );\n\n\t\treturn this;\n\n\t},\n\n\trotateY: function ( angle ) {\n\n\t\t// rotate geometry around world y-axis\n\n\t\t_m1$3.makeRotationY( angle );\n\n\t\tthis.applyMatrix4( _m1$3 );\n\n\t\treturn this;\n\n\t},\n\n\trotateZ: function ( angle ) {\n\n\t\t// rotate geometry around world z-axis\n\n\t\t_m1$3.makeRotationZ( angle );\n\n\t\tthis.applyMatrix4( _m1$3 );\n\n\t\treturn this;\n\n\t},\n\n\ttranslate: function ( x, y, z ) {\n\n\t\t// translate geometry\n\n\t\t_m1$3.makeTranslation( x, y, z );\n\n\t\tthis.applyMatrix4( _m1$3 );\n\n\t\treturn this;\n\n\t},\n\n\tscale: function ( x, y, z ) {\n\n\t\t// scale geometry\n\n\t\t_m1$3.makeScale( x, y, z );\n\n\t\tthis.applyMatrix4( _m1$3 );\n\n\t\treturn this;\n\n\t},\n\n\tlookAt: function ( vector ) {\n\n\t\t_obj$1.lookAt( vector );\n\n\t\t_obj$1.updateMatrix();\n\n\t\tthis.applyMatrix4( _obj$1.matrix );\n\n\t\treturn this;\n\n\t},\n\n\tfromBufferGeometry: function ( geometry ) {\n\n\t\tvar scope = this;\n\n\t\tvar indices = geometry.index !== null ? geometry.index.array : undefined;\n\t\tvar attributes = geometry.attributes;\n\n\t\tif ( attributes.position === undefined ) {\n\n\t\t\tconsole.error( 'THREE.Geometry.fromBufferGeometry(): Position attribute required for conversion.' );\n\t\t\treturn this;\n\n\t\t}\n\n\t\tvar positions = attributes.position.array;\n\t\tvar normals = attributes.normal !== undefined ? attributes.normal.array : undefined;\n\t\tvar colors = attributes.color !== undefined ? attributes.color.array : undefined;\n\t\tvar uvs = attributes.uv !== undefined ? attributes.uv.array : undefined;\n\t\tvar uvs2 = attributes.uv2 !== undefined ? attributes.uv2.array : undefined;\n\n\t\tif ( uvs2 !== undefined ) this.faceVertexUvs[ 1 ] = [];\n\n\t\tfor ( var i = 0; i < positions.length; i += 3 ) {\n\n\t\t\tscope.vertices.push( new Vector3().fromArray( positions, i ) );\n\n\t\t\tif ( colors !== undefined ) {\n\n\t\t\t\tscope.colors.push( new Color().fromArray( colors, i ) );\n\n\t\t\t}\n\n\t\t}\n\n\t\tfunction addFace( a, b, c, materialIndex ) {\n\n\t\t\tvar vertexColors = ( colors === undefined ) ? [] : [\n\t\t\t\tscope.colors[ a ].clone(),\n\t\t\t\tscope.colors[ b ].clone(),\n\t\t\t\tscope.colors[ c ].clone() ];\n\n\t\t\tvar vertexNormals = ( normals === undefined ) ? [] : [\n\t\t\t\tnew Vector3().fromArray( normals, a * 3 ),\n\t\t\t\tnew Vector3().fromArray( normals, b * 3 ),\n\t\t\t\tnew Vector3().fromArray( normals, c * 3 )\n\t\t\t];\n\n\t\t\tvar face = new Face3( a, b, c, vertexNormals, vertexColors, materialIndex );\n\n\t\t\tscope.faces.push( face );\n\n\t\t\tif ( uvs !== undefined ) {\n\n\t\t\t\tscope.faceVertexUvs[ 0 ].push( [\n\t\t\t\t\tnew Vector2().fromArray( uvs, a * 2 ),\n\t\t\t\t\tnew Vector2().fromArray( uvs, b * 2 ),\n\t\t\t\t\tnew Vector2().fromArray( uvs, c * 2 )\n\t\t\t\t] );\n\n\t\t\t}\n\n\t\t\tif ( uvs2 !== undefined ) {\n\n\t\t\t\tscope.faceVertexUvs[ 1 ].push( [\n\t\t\t\t\tnew Vector2().fromArray( uvs2, a * 2 ),\n\t\t\t\t\tnew Vector2().fromArray( uvs2, b * 2 ),\n\t\t\t\t\tnew Vector2().fromArray( uvs2, c * 2 )\n\t\t\t\t] );\n\n\t\t\t}\n\n\t\t}\n\n\t\tvar groups = geometry.groups;\n\n\t\tif ( groups.length > 0 ) {\n\n\t\t\tfor ( var i = 0; i < groups.length; i ++ ) {\n\n\t\t\t\tvar group = groups[ i ];\n\n\t\t\t\tvar start = group.start;\n\t\t\t\tvar count = group.count;\n\n\t\t\t\tfor ( var j = start, jl = start + count; j < jl; j += 3 ) {\n\n\t\t\t\t\tif ( indices !== undefined ) {\n\n\t\t\t\t\t\taddFace( indices[ j ], indices[ j + 1 ], indices[ j + 2 ], group.materialIndex );\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\taddFace( j, j + 1, j + 2, group.materialIndex );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\tif ( indices !== undefined ) {\n\n\t\t\t\tfor ( var i = 0; i < indices.length; i += 3 ) {\n\n\t\t\t\t\taddFace( indices[ i ], indices[ i + 1 ], indices[ i + 2 ] );\n\n\t\t\t\t}\n\n\t\t\t} else {\n\n\t\t\t\tfor ( var i = 0; i < positions.length / 3; i += 3 ) {\n\n\t\t\t\t\taddFace( i, i + 1, i + 2 );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\tthis.computeFaceNormals();\n\n\t\tif ( geometry.boundingBox !== null ) {\n\n\t\t\tthis.boundingBox = geometry.boundingBox.clone();\n\n\t\t}\n\n\t\tif ( geometry.boundingSphere !== null ) {\n\n\t\t\tthis.boundingSphere = geometry.boundingSphere.clone();\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tcenter: function () {\n\n\t\tthis.computeBoundingBox();\n\n\t\tthis.boundingBox.getCenter( _offset$1 ).negate();\n\n\t\tthis.translate( _offset$1.x, _offset$1.y, _offset$1.z );\n\n\t\treturn this;\n\n\t},\n\n\tnormalize: function () {\n\n\t\tthis.computeBoundingSphere();\n\n\t\tvar center = this.boundingSphere.center;\n\t\tvar radius = this.boundingSphere.radius;\n\n\t\tvar s = radius === 0 ? 1 : 1.0 / radius;\n\n\t\tvar matrix = new Matrix4();\n\t\tmatrix.set(\n\t\t\ts, 0, 0, - s * center.x,\n\t\t\t0, s, 0, - s * center.y,\n\t\t\t0, 0, s, - s * center.z,\n\t\t\t0, 0, 0, 1\n\t\t);\n\n\t\tthis.applyMatrix4( matrix );\n\n\t\treturn this;\n\n\t},\n\n\tcomputeFaceNormals: function () {\n\n\t\tvar cb = new Vector3(), ab = new Vector3();\n\n\t\tfor ( var f = 0, fl = this.faces.length; f < fl; f ++ ) {\n\n\t\t\tvar face = this.faces[ f ];\n\n\t\t\tvar vA = this.vertices[ face.a ];\n\t\t\tvar vB = this.vertices[ face.b ];\n\t\t\tvar vC = this.vertices[ face.c ];\n\n\t\t\tcb.subVectors( vC, vB );\n\t\t\tab.subVectors( vA, vB );\n\t\t\tcb.cross( ab );\n\n\t\t\tcb.normalize();\n\n\t\t\tface.normal.copy( cb );\n\n\t\t}\n\n\t},\n\n\tcomputeVertexNormals: function ( areaWeighted ) {\n\n\t\tif ( areaWeighted === undefined ) areaWeighted = true;\n\n\t\tvar v, vl, f, fl, face, vertices;\n\n\t\tvertices = new Array( this.vertices.length );\n\n\t\tfor ( v = 0, vl = this.vertices.length; v < vl; v ++ ) {\n\n\t\t\tvertices[ v ] = new Vector3();\n\n\t\t}\n\n\t\tif ( areaWeighted ) {\n\n\t\t\t// vertex normals weighted by triangle areas\n\t\t\t// http://www.iquilezles.org/www/articles/normals/normals.htm\n\n\t\t\tvar vA, vB, vC;\n\t\t\tvar cb = new Vector3(), ab = new Vector3();\n\n\t\t\tfor ( f = 0, fl = this.faces.length; f < fl; f ++ ) {\n\n\t\t\t\tface = this.faces[ f ];\n\n\t\t\t\tvA = this.vertices[ face.a ];\n\t\t\t\tvB = this.vertices[ face.b ];\n\t\t\t\tvC = this.vertices[ face.c ];\n\n\t\t\t\tcb.subVectors( vC, vB );\n\t\t\t\tab.subVectors( vA, vB );\n\t\t\t\tcb.cross( ab );\n\n\t\t\t\tvertices[ face.a ].add( cb );\n\t\t\t\tvertices[ face.b ].add( cb );\n\t\t\t\tvertices[ face.c ].add( cb );\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\tthis.computeFaceNormals();\n\n\t\t\tfor ( f = 0, fl = this.faces.length; f < fl; f ++ ) {\n\n\t\t\t\tface = this.faces[ f ];\n\n\t\t\t\tvertices[ face.a ].add( face.normal );\n\t\t\t\tvertices[ face.b ].add( face.normal );\n\t\t\t\tvertices[ face.c ].add( face.normal );\n\n\t\t\t}\n\n\t\t}\n\n\t\tfor ( v = 0, vl = this.vertices.length; v < vl; v ++ ) {\n\n\t\t\tvertices[ v ].normalize();\n\n\t\t}\n\n\t\tfor ( f = 0, fl = this.faces.length; f < fl; f ++ ) {\n\n\t\t\tface = this.faces[ f ];\n\n\t\t\tvar vertexNormals = face.vertexNormals;\n\n\t\t\tif ( vertexNormals.length === 3 ) {\n\n\t\t\t\tvertexNormals[ 0 ].copy( vertices[ face.a ] );\n\t\t\t\tvertexNormals[ 1 ].copy( vertices[ face.b ] );\n\t\t\t\tvertexNormals[ 2 ].copy( vertices[ face.c ] );\n\n\t\t\t} else {\n\n\t\t\t\tvertexNormals[ 0 ] = vertices[ face.a ].clone();\n\t\t\t\tvertexNormals[ 1 ] = vertices[ face.b ].clone();\n\t\t\t\tvertexNormals[ 2 ] = vertices[ face.c ].clone();\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( this.faces.length > 0 ) {\n\n\t\t\tthis.normalsNeedUpdate = true;\n\n\t\t}\n\n\t},\n\n\tcomputeFlatVertexNormals: function () {\n\n\t\tvar f, fl, face;\n\n\t\tthis.computeFaceNormals();\n\n\t\tfor ( f = 0, fl = this.faces.length; f < fl; f ++ ) {\n\n\t\t\tface = this.faces[ f ];\n\n\t\t\tvar vertexNormals = face.vertexNormals;\n\n\t\t\tif ( vertexNormals.length === 3 ) {\n\n\t\t\t\tvertexNormals[ 0 ].copy( face.normal );\n\t\t\t\tvertexNormals[ 1 ].copy( face.normal );\n\t\t\t\tvertexNormals[ 2 ].copy( face.normal );\n\n\t\t\t} else {\n\n\t\t\t\tvertexNormals[ 0 ] = face.normal.clone();\n\t\t\t\tvertexNormals[ 1 ] = face.normal.clone();\n\t\t\t\tvertexNormals[ 2 ] = face.normal.clone();\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( this.faces.length > 0 ) {\n\n\t\t\tthis.normalsNeedUpdate = true;\n\n\t\t}\n\n\t},\n\n\tcomputeMorphNormals: function () {\n\n\t\tvar i, il, f, fl, face;\n\n\t\t// save original normals\n\t\t// - create temp variables on first access\n\t\t//   otherwise just copy (for faster repeated calls)\n\n\t\tfor ( f = 0, fl = this.faces.length; f < fl; f ++ ) {\n\n\t\t\tface = this.faces[ f ];\n\n\t\t\tif ( ! face.__originalFaceNormal ) {\n\n\t\t\t\tface.__originalFaceNormal = face.normal.clone();\n\n\t\t\t} else {\n\n\t\t\t\tface.__originalFaceNormal.copy( face.normal );\n\n\t\t\t}\n\n\t\t\tif ( ! face.__originalVertexNormals ) face.__originalVertexNormals = [];\n\n\t\t\tfor ( i = 0, il = face.vertexNormals.length; i < il; i ++ ) {\n\n\t\t\t\tif ( ! face.__originalVertexNormals[ i ] ) {\n\n\t\t\t\t\tface.__originalVertexNormals[ i ] = face.vertexNormals[ i ].clone();\n\n\t\t\t\t} else {\n\n\t\t\t\t\tface.__originalVertexNormals[ i ].copy( face.vertexNormals[ i ] );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\t// use temp geometry to compute face and vertex normals for each morph\n\n\t\tvar tmpGeo = new Geometry();\n\t\ttmpGeo.faces = this.faces;\n\n\t\tfor ( i = 0, il = this.morphTargets.length; i < il; i ++ ) {\n\n\t\t\t// create on first access\n\n\t\t\tif ( ! this.morphNormals[ i ] ) {\n\n\t\t\t\tthis.morphNormals[ i ] = {};\n\t\t\t\tthis.morphNormals[ i ].faceNormals = [];\n\t\t\t\tthis.morphNormals[ i ].vertexNormals = [];\n\n\t\t\t\tvar dstNormalsFace = this.morphNormals[ i ].faceNormals;\n\t\t\t\tvar dstNormalsVertex = this.morphNormals[ i ].vertexNormals;\n\n\t\t\t\tvar faceNormal, vertexNormals;\n\n\t\t\t\tfor ( f = 0, fl = this.faces.length; f < fl; f ++ ) {\n\n\t\t\t\t\tfaceNormal = new Vector3();\n\t\t\t\t\tvertexNormals = { a: new Vector3(), b: new Vector3(), c: new Vector3() };\n\n\t\t\t\t\tdstNormalsFace.push( faceNormal );\n\t\t\t\t\tdstNormalsVertex.push( vertexNormals );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tvar morphNormals = this.morphNormals[ i ];\n\n\t\t\t// set vertices to morph target\n\n\t\t\ttmpGeo.vertices = this.morphTargets[ i ].vertices;\n\n\t\t\t// compute morph normals\n\n\t\t\ttmpGeo.computeFaceNormals();\n\t\t\ttmpGeo.computeVertexNormals();\n\n\t\t\t// store morph normals\n\n\t\t\tvar faceNormal, vertexNormals;\n\n\t\t\tfor ( f = 0, fl = this.faces.length; f < fl; f ++ ) {\n\n\t\t\t\tface = this.faces[ f ];\n\n\t\t\t\tfaceNormal = morphNormals.faceNormals[ f ];\n\t\t\t\tvertexNormals = morphNormals.vertexNormals[ f ];\n\n\t\t\t\tfaceNormal.copy( face.normal );\n\n\t\t\t\tvertexNormals.a.copy( face.vertexNormals[ 0 ] );\n\t\t\t\tvertexNormals.b.copy( face.vertexNormals[ 1 ] );\n\t\t\t\tvertexNormals.c.copy( face.vertexNormals[ 2 ] );\n\n\t\t\t}\n\n\t\t}\n\n\t\t// restore original normals\n\n\t\tfor ( f = 0, fl = this.faces.length; f < fl; f ++ ) {\n\n\t\t\tface = this.faces[ f ];\n\n\t\t\tface.normal = face.__originalFaceNormal;\n\t\t\tface.vertexNormals = face.__originalVertexNormals;\n\n\t\t}\n\n\t},\n\n\tcomputeBoundingBox: function () {\n\n\t\tif ( this.boundingBox === null ) {\n\n\t\t\tthis.boundingBox = new Box3();\n\n\t\t}\n\n\t\tthis.boundingBox.setFromPoints( this.vertices );\n\n\t},\n\n\tcomputeBoundingSphere: function () {\n\n\t\tif ( this.boundingSphere === null ) {\n\n\t\t\tthis.boundingSphere = new Sphere();\n\n\t\t}\n\n\t\tthis.boundingSphere.setFromPoints( this.vertices );\n\n\t},\n\n\tmerge: function ( geometry, matrix, materialIndexOffset ) {\n\n\t\tif ( ! ( geometry && geometry.isGeometry ) ) {\n\n\t\t\tconsole.error( 'THREE.Geometry.merge(): geometry not an instance of THREE.Geometry.', geometry );\n\t\t\treturn;\n\n\t\t}\n\n\t\tvar normalMatrix,\n\t\t\tvertexOffset = this.vertices.length,\n\t\t\tvertices1 = this.vertices,\n\t\t\tvertices2 = geometry.vertices,\n\t\t\tfaces1 = this.faces,\n\t\t\tfaces2 = geometry.faces,\n\t\t\tcolors1 = this.colors,\n\t\t\tcolors2 = geometry.colors;\n\n\t\tif ( materialIndexOffset === undefined ) materialIndexOffset = 0;\n\n\t\tif ( matrix !== undefined ) {\n\n\t\t\tnormalMatrix = new Matrix3().getNormalMatrix( matrix );\n\n\t\t}\n\n\t\t// vertices\n\n\t\tfor ( var i = 0, il = vertices2.length; i < il; i ++ ) {\n\n\t\t\tvar vertex = vertices2[ i ];\n\n\t\t\tvar vertexCopy = vertex.clone();\n\n\t\t\tif ( matrix !== undefined ) vertexCopy.applyMatrix4( matrix );\n\n\t\t\tvertices1.push( vertexCopy );\n\n\t\t}\n\n\t\t// colors\n\n\t\tfor ( var i = 0, il = colors2.length; i < il; i ++ ) {\n\n\t\t\tcolors1.push( colors2[ i ].clone() );\n\n\t\t}\n\n\t\t// faces\n\n\t\tfor ( i = 0, il = faces2.length; i < il; i ++ ) {\n\n\t\t\tvar face = faces2[ i ], faceCopy, normal, color,\n\t\t\t\tfaceVertexNormals = face.vertexNormals,\n\t\t\t\tfaceVertexColors = face.vertexColors;\n\n\t\t\tfaceCopy = new Face3( face.a + vertexOffset, face.b + vertexOffset, face.c + vertexOffset );\n\t\t\tfaceCopy.normal.copy( face.normal );\n\n\t\t\tif ( normalMatrix !== undefined ) {\n\n\t\t\t\tfaceCopy.normal.applyMatrix3( normalMatrix ).normalize();\n\n\t\t\t}\n\n\t\t\tfor ( var j = 0, jl = faceVertexNormals.length; j < jl; j ++ ) {\n\n\t\t\t\tnormal = faceVertexNormals[ j ].clone();\n\n\t\t\t\tif ( normalMatrix !== undefined ) {\n\n\t\t\t\t\tnormal.applyMatrix3( normalMatrix ).normalize();\n\n\t\t\t\t}\n\n\t\t\t\tfaceCopy.vertexNormals.push( normal );\n\n\t\t\t}\n\n\t\t\tfaceCopy.color.copy( face.color );\n\n\t\t\tfor ( var j = 0, jl = faceVertexColors.length; j < jl; j ++ ) {\n\n\t\t\t\tcolor = faceVertexColors[ j ];\n\t\t\t\tfaceCopy.vertexColors.push( color.clone() );\n\n\t\t\t}\n\n\t\t\tfaceCopy.materialIndex = face.materialIndex + materialIndexOffset;\n\n\t\t\tfaces1.push( faceCopy );\n\n\t\t}\n\n\t\t// uvs\n\n\t\tfor ( var i = 0, il = geometry.faceVertexUvs.length; i < il; i ++ ) {\n\n\t\t\tvar faceVertexUvs2 = geometry.faceVertexUvs[ i ];\n\n\t\t\tif ( this.faceVertexUvs[ i ] === undefined ) this.faceVertexUvs[ i ] = [];\n\n\t\t\tfor ( var j = 0, jl = faceVertexUvs2.length; j < jl; j ++ ) {\n\n\t\t\t\tvar uvs2 = faceVertexUvs2[ j ], uvsCopy = [];\n\n\t\t\t\tfor ( var k = 0, kl = uvs2.length; k < kl; k ++ ) {\n\n\t\t\t\t\tuvsCopy.push( uvs2[ k ].clone() );\n\n\t\t\t\t}\n\n\t\t\t\tthis.faceVertexUvs[ i ].push( uvsCopy );\n\n\t\t\t}\n\n\t\t}\n\n\t},\n\n\tmergeMesh: function ( mesh ) {\n\n\t\tif ( ! ( mesh && mesh.isMesh ) ) {\n\n\t\t\tconsole.error( 'THREE.Geometry.mergeMesh(): mesh not an instance of THREE.Mesh.', mesh );\n\t\t\treturn;\n\n\t\t}\n\n\t\tif ( mesh.matrixAutoUpdate ) mesh.updateMatrix();\n\n\t\tthis.merge( mesh.geometry, mesh.matrix );\n\n\t},\n\n\t/*\n\t * Checks for duplicate vertices with hashmap.\n\t * Duplicated vertices are removed\n\t * and faces' vertices are updated.\n\t */\n\n\tmergeVertices: function () {\n\n\t\tvar verticesMap = {}; // Hashmap for looking up vertices by position coordinates (and making sure they are unique)\n\t\tvar unique = [], changes = [];\n\n\t\tvar v, key;\n\t\tvar precisionPoints = 4; // number of decimal points, e.g. 4 for epsilon of 0.0001\n\t\tvar precision = Math.pow( 10, precisionPoints );\n\t\tvar i, il, face;\n\t\tvar indices, j, jl;\n\n\t\tfor ( i = 0, il = this.vertices.length; i < il; i ++ ) {\n\n\t\t\tv = this.vertices[ i ];\n\t\t\tkey = Math.round( v.x * precision ) + '_' + Math.round( v.y * precision ) + '_' + Math.round( v.z * precision );\n\n\t\t\tif ( verticesMap[ key ] === undefined ) {\n\n\t\t\t\tverticesMap[ key ] = i;\n\t\t\t\tunique.push( this.vertices[ i ] );\n\t\t\t\tchanges[ i ] = unique.length - 1;\n\n\t\t\t} else {\n\n\t\t\t\t//console.log('Duplicate vertex found. ', i, ' could be using ', verticesMap[key]);\n\t\t\t\tchanges[ i ] = changes[ verticesMap[ key ] ];\n\n\t\t\t}\n\n\t\t}\n\n\n\t\t// if faces are completely degenerate after merging vertices, we\n\t\t// have to remove them from the geometry.\n\t\tvar faceIndicesToRemove = [];\n\n\t\tfor ( i = 0, il = this.faces.length; i < il; i ++ ) {\n\n\t\t\tface = this.faces[ i ];\n\n\t\t\tface.a = changes[ face.a ];\n\t\t\tface.b = changes[ face.b ];\n\t\t\tface.c = changes[ face.c ];\n\n\t\t\tindices = [ face.a, face.b, face.c ];\n\n\t\t\t// if any duplicate vertices are found in a Face3\n\t\t\t// we have to remove the face as nothing can be saved\n\t\t\tfor ( var n = 0; n < 3; n ++ ) {\n\n\t\t\t\tif ( indices[ n ] === indices[ ( n + 1 ) % 3 ] ) {\n\n\t\t\t\t\tfaceIndicesToRemove.push( i );\n\t\t\t\t\tbreak;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\tfor ( i = faceIndicesToRemove.length - 1; i >= 0; i -- ) {\n\n\t\t\tvar idx = faceIndicesToRemove[ i ];\n\n\t\t\tthis.faces.splice( idx, 1 );\n\n\t\t\tfor ( j = 0, jl = this.faceVertexUvs.length; j < jl; j ++ ) {\n\n\t\t\t\tthis.faceVertexUvs[ j ].splice( idx, 1 );\n\n\t\t\t}\n\n\t\t}\n\n\t\t// Use unique set of vertices\n\n\t\tvar diff = this.vertices.length - unique.length;\n\t\tthis.vertices = unique;\n\t\treturn diff;\n\n\t},\n\n\tsetFromPoints: function ( points ) {\n\n\t\tthis.vertices = [];\n\n\t\tfor ( var i = 0, l = points.length; i < l; i ++ ) {\n\n\t\t\tvar point = points[ i ];\n\t\t\tthis.vertices.push( new Vector3( point.x, point.y, point.z || 0 ) );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tsortFacesByMaterialIndex: function () {\n\n\t\tvar faces = this.faces;\n\t\tvar length = faces.length;\n\n\t\t// tag faces\n\n\t\tfor ( var i = 0; i < length; i ++ ) {\n\n\t\t\tfaces[ i ]._id = i;\n\n\t\t}\n\n\t\t// sort faces\n\n\t\tfunction materialIndexSort( a, b ) {\n\n\t\t\treturn a.materialIndex - b.materialIndex;\n\n\t\t}\n\n\t\tfaces.sort( materialIndexSort );\n\n\t\t// sort uvs\n\n\t\tvar uvs1 = this.faceVertexUvs[ 0 ];\n\t\tvar uvs2 = this.faceVertexUvs[ 1 ];\n\n\t\tvar newUvs1, newUvs2;\n\n\t\tif ( uvs1 && uvs1.length === length ) newUvs1 = [];\n\t\tif ( uvs2 && uvs2.length === length ) newUvs2 = [];\n\n\t\tfor ( var i = 0; i < length; i ++ ) {\n\n\t\t\tvar id = faces[ i ]._id;\n\n\t\t\tif ( newUvs1 ) newUvs1.push( uvs1[ id ] );\n\t\t\tif ( newUvs2 ) newUvs2.push( uvs2[ id ] );\n\n\t\t}\n\n\t\tif ( newUvs1 ) this.faceVertexUvs[ 0 ] = newUvs1;\n\t\tif ( newUvs2 ) this.faceVertexUvs[ 1 ] = newUvs2;\n\n\t},\n\n\ttoJSON: function () {\n\n\t\tvar data = {\n\t\t\tmetadata: {\n\t\t\t\tversion: 4.5,\n\t\t\t\ttype: 'Geometry',\n\t\t\t\tgenerator: 'Geometry.toJSON'\n\t\t\t}\n\t\t};\n\n\t\t// standard Geometry serialization\n\n\t\tdata.uuid = this.uuid;\n\t\tdata.type = this.type;\n\t\tif ( this.name !== '' ) data.name = this.name;\n\n\t\tif ( this.parameters !== undefined ) {\n\n\t\t\tvar parameters = this.parameters;\n\n\t\t\tfor ( var key in parameters ) {\n\n\t\t\t\tif ( parameters[ key ] !== undefined ) data[ key ] = parameters[ key ];\n\n\t\t\t}\n\n\t\t\treturn data;\n\n\t\t}\n\n\t\tvar vertices = [];\n\n\t\tfor ( var i = 0; i < this.vertices.length; i ++ ) {\n\n\t\t\tvar vertex = this.vertices[ i ];\n\t\t\tvertices.push( vertex.x, vertex.y, vertex.z );\n\n\t\t}\n\n\t\tvar faces = [];\n\t\tvar normals = [];\n\t\tvar normalsHash = {};\n\t\tvar colors = [];\n\t\tvar colorsHash = {};\n\t\tvar uvs = [];\n\t\tvar uvsHash = {};\n\n\t\tfor ( var i = 0; i < this.faces.length; i ++ ) {\n\n\t\t\tvar face = this.faces[ i ];\n\n\t\t\tvar hasMaterial = true;\n\t\t\tvar hasFaceUv = false; // deprecated\n\t\t\tvar hasFaceVertexUv = this.faceVertexUvs[ 0 ][ i ] !== undefined;\n\t\t\tvar hasFaceNormal = face.normal.length() > 0;\n\t\t\tvar hasFaceVertexNormal = face.vertexNormals.length > 0;\n\t\t\tvar hasFaceColor = face.color.r !== 1 || face.color.g !== 1 || face.color.b !== 1;\n\t\t\tvar hasFaceVertexColor = face.vertexColors.length > 0;\n\n\t\t\tvar faceType = 0;\n\n\t\t\tfaceType = setBit( faceType, 0, 0 ); // isQuad\n\t\t\tfaceType = setBit( faceType, 1, hasMaterial );\n\t\t\tfaceType = setBit( faceType, 2, hasFaceUv );\n\t\t\tfaceType = setBit( faceType, 3, hasFaceVertexUv );\n\t\t\tfaceType = setBit( faceType, 4, hasFaceNormal );\n\t\t\tfaceType = setBit( faceType, 5, hasFaceVertexNormal );\n\t\t\tfaceType = setBit( faceType, 6, hasFaceColor );\n\t\t\tfaceType = setBit( faceType, 7, hasFaceVertexColor );\n\n\t\t\tfaces.push( faceType );\n\t\t\tfaces.push( face.a, face.b, face.c );\n\t\t\tfaces.push( face.materialIndex );\n\n\t\t\tif ( hasFaceVertexUv ) {\n\n\t\t\t\tvar faceVertexUvs = this.faceVertexUvs[ 0 ][ i ];\n\n\t\t\t\tfaces.push(\n\t\t\t\t\tgetUvIndex( faceVertexUvs[ 0 ] ),\n\t\t\t\t\tgetUvIndex( faceVertexUvs[ 1 ] ),\n\t\t\t\t\tgetUvIndex( faceVertexUvs[ 2 ] )\n\t\t\t\t);\n\n\t\t\t}\n\n\t\t\tif ( hasFaceNormal ) {\n\n\t\t\t\tfaces.push( getNormalIndex( face.normal ) );\n\n\t\t\t}\n\n\t\t\tif ( hasFaceVertexNormal ) {\n\n\t\t\t\tvar vertexNormals = face.vertexNormals;\n\n\t\t\t\tfaces.push(\n\t\t\t\t\tgetNormalIndex( vertexNormals[ 0 ] ),\n\t\t\t\t\tgetNormalIndex( vertexNormals[ 1 ] ),\n\t\t\t\t\tgetNormalIndex( vertexNormals[ 2 ] )\n\t\t\t\t);\n\n\t\t\t}\n\n\t\t\tif ( hasFaceColor ) {\n\n\t\t\t\tfaces.push( getColorIndex( face.color ) );\n\n\t\t\t}\n\n\t\t\tif ( hasFaceVertexColor ) {\n\n\t\t\t\tvar vertexColors = face.vertexColors;\n\n\t\t\t\tfaces.push(\n\t\t\t\t\tgetColorIndex( vertexColors[ 0 ] ),\n\t\t\t\t\tgetColorIndex( vertexColors[ 1 ] ),\n\t\t\t\t\tgetColorIndex( vertexColors[ 2 ] )\n\t\t\t\t);\n\n\t\t\t}\n\n\t\t}\n\n\t\tfunction setBit( value, position, enabled ) {\n\n\t\t\treturn enabled ? value | ( 1 << position ) : value & ( ~ ( 1 << position ) );\n\n\t\t}\n\n\t\tfunction getNormalIndex( normal ) {\n\n\t\t\tvar hash = normal.x.toString() + normal.y.toString() + normal.z.toString();\n\n\t\t\tif ( normalsHash[ hash ] !== undefined ) {\n\n\t\t\t\treturn normalsHash[ hash ];\n\n\t\t\t}\n\n\t\t\tnormalsHash[ hash ] = normals.length / 3;\n\t\t\tnormals.push( normal.x, normal.y, normal.z );\n\n\t\t\treturn normalsHash[ hash ];\n\n\t\t}\n\n\t\tfunction getColorIndex( color ) {\n\n\t\t\tvar hash = color.r.toString() + color.g.toString() + color.b.toString();\n\n\t\t\tif ( colorsHash[ hash ] !== undefined ) {\n\n\t\t\t\treturn colorsHash[ hash ];\n\n\t\t\t}\n\n\t\t\tcolorsHash[ hash ] = colors.length;\n\t\t\tcolors.push( color.getHex() );\n\n\t\t\treturn colorsHash[ hash ];\n\n\t\t}\n\n\t\tfunction getUvIndex( uv ) {\n\n\t\t\tvar hash = uv.x.toString() + uv.y.toString();\n\n\t\t\tif ( uvsHash[ hash ] !== undefined ) {\n\n\t\t\t\treturn uvsHash[ hash ];\n\n\t\t\t}\n\n\t\t\tuvsHash[ hash ] = uvs.length / 2;\n\t\t\tuvs.push( uv.x, uv.y );\n\n\t\t\treturn uvsHash[ hash ];\n\n\t\t}\n\n\t\tdata.data = {};\n\n\t\tdata.data.vertices = vertices;\n\t\tdata.data.normals = normals;\n\t\tif ( colors.length > 0 ) data.data.colors = colors;\n\t\tif ( uvs.length > 0 ) data.data.uvs = [ uvs ]; // temporal backward compatibility\n\t\tdata.data.faces = faces;\n\n\t\treturn data;\n\n\t},\n\n\tclone: function () {\n\n\t\t/*\n\t\t // Handle primitives\n\n\t\t var parameters = this.parameters;\n\n\t\t if ( parameters !== undefined ) {\n\n\t\t var values = [];\n\n\t\t for ( var key in parameters ) {\n\n\t\t values.push( parameters[ key ] );\n\n\t\t }\n\n\t\t var geometry = Object.create( this.constructor.prototype );\n\t\t this.constructor.apply( geometry, values );\n\t\t return geometry;\n\n\t\t }\n\n\t\t return new this.constructor().copy( this );\n\t\t */\n\n\t\treturn new Geometry().copy( this );\n\n\t},\n\n\tcopy: function ( source ) {\n\n\t\tvar i, il, j, jl, k, kl;\n\n\t\t// reset\n\n\t\tthis.vertices = [];\n\t\tthis.colors = [];\n\t\tthis.faces = [];\n\t\tthis.faceVertexUvs = [[]];\n\t\tthis.morphTargets = [];\n\t\tthis.morphNormals = [];\n\t\tthis.skinWeights = [];\n\t\tthis.skinIndices = [];\n\t\tthis.lineDistances = [];\n\t\tthis.boundingBox = null;\n\t\tthis.boundingSphere = null;\n\n\t\t// name\n\n\t\tthis.name = source.name;\n\n\t\t// vertices\n\n\t\tvar vertices = source.vertices;\n\n\t\tfor ( i = 0, il = vertices.length; i < il; i ++ ) {\n\n\t\t\tthis.vertices.push( vertices[ i ].clone() );\n\n\t\t}\n\n\t\t// colors\n\n\t\tvar colors = source.colors;\n\n\t\tfor ( i = 0, il = colors.length; i < il; i ++ ) {\n\n\t\t\tthis.colors.push( colors[ i ].clone() );\n\n\t\t}\n\n\t\t// faces\n\n\t\tvar faces = source.faces;\n\n\t\tfor ( i = 0, il = faces.length; i < il; i ++ ) {\n\n\t\t\tthis.faces.push( faces[ i ].clone() );\n\n\t\t}\n\n\t\t// face vertex uvs\n\n\t\tfor ( i = 0, il = source.faceVertexUvs.length; i < il; i ++ ) {\n\n\t\t\tvar faceVertexUvs = source.faceVertexUvs[ i ];\n\n\t\t\tif ( this.faceVertexUvs[ i ] === undefined ) {\n\n\t\t\t\tthis.faceVertexUvs[ i ] = [];\n\n\t\t\t}\n\n\t\t\tfor ( j = 0, jl = faceVertexUvs.length; j < jl; j ++ ) {\n\n\t\t\t\tvar uvs = faceVertexUvs[ j ], uvsCopy = [];\n\n\t\t\t\tfor ( k = 0, kl = uvs.length; k < kl; k ++ ) {\n\n\t\t\t\t\tvar uv = uvs[ k ];\n\n\t\t\t\t\tuvsCopy.push( uv.clone() );\n\n\t\t\t\t}\n\n\t\t\t\tthis.faceVertexUvs[ i ].push( uvsCopy );\n\n\t\t\t}\n\n\t\t}\n\n\t\t// morph targets\n\n\t\tvar morphTargets = source.morphTargets;\n\n\t\tfor ( i = 0, il = morphTargets.length; i < il; i ++ ) {\n\n\t\t\tvar morphTarget = {};\n\t\t\tmorphTarget.name = morphTargets[ i ].name;\n\n\t\t\t// vertices\n\n\t\t\tif ( morphTargets[ i ].vertices !== undefined ) {\n\n\t\t\t\tmorphTarget.vertices = [];\n\n\t\t\t\tfor ( j = 0, jl = morphTargets[ i ].vertices.length; j < jl; j ++ ) {\n\n\t\t\t\t\tmorphTarget.vertices.push( morphTargets[ i ].vertices[ j ].clone() );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\t// normals\n\n\t\t\tif ( morphTargets[ i ].normals !== undefined ) {\n\n\t\t\t\tmorphTarget.normals = [];\n\n\t\t\t\tfor ( j = 0, jl = morphTargets[ i ].normals.length; j < jl; j ++ ) {\n\n\t\t\t\t\tmorphTarget.normals.push( morphTargets[ i ].normals[ j ].clone() );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tthis.morphTargets.push( morphTarget );\n\n\t\t}\n\n\t\t// morph normals\n\n\t\tvar morphNormals = source.morphNormals;\n\n\t\tfor ( i = 0, il = morphNormals.length; i < il; i ++ ) {\n\n\t\t\tvar morphNormal = {};\n\n\t\t\t// vertex normals\n\n\t\t\tif ( morphNormals[ i ].vertexNormals !== undefined ) {\n\n\t\t\t\tmorphNormal.vertexNormals = [];\n\n\t\t\t\tfor ( j = 0, jl = morphNormals[ i ].vertexNormals.length; j < jl; j ++ ) {\n\n\t\t\t\t\tvar srcVertexNormal = morphNormals[ i ].vertexNormals[ j ];\n\t\t\t\t\tvar destVertexNormal = {};\n\n\t\t\t\t\tdestVertexNormal.a = srcVertexNormal.a.clone();\n\t\t\t\t\tdestVertexNormal.b = srcVertexNormal.b.clone();\n\t\t\t\t\tdestVertexNormal.c = srcVertexNormal.c.clone();\n\n\t\t\t\t\tmorphNormal.vertexNormals.push( destVertexNormal );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\t// face normals\n\n\t\t\tif ( morphNormals[ i ].faceNormals !== undefined ) {\n\n\t\t\t\tmorphNormal.faceNormals = [];\n\n\t\t\t\tfor ( j = 0, jl = morphNormals[ i ].faceNormals.length; j < jl; j ++ ) {\n\n\t\t\t\t\tmorphNormal.faceNormals.push( morphNormals[ i ].faceNormals[ j ].clone() );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tthis.morphNormals.push( morphNormal );\n\n\t\t}\n\n\t\t// skin weights\n\n\t\tvar skinWeights = source.skinWeights;\n\n\t\tfor ( i = 0, il = skinWeights.length; i < il; i ++ ) {\n\n\t\t\tthis.skinWeights.push( skinWeights[ i ].clone() );\n\n\t\t}\n\n\t\t// skin indices\n\n\t\tvar skinIndices = source.skinIndices;\n\n\t\tfor ( i = 0, il = skinIndices.length; i < il; i ++ ) {\n\n\t\t\tthis.skinIndices.push( skinIndices[ i ].clone() );\n\n\t\t}\n\n\t\t// line distances\n\n\t\tvar lineDistances = source.lineDistances;\n\n\t\tfor ( i = 0, il = lineDistances.length; i < il; i ++ ) {\n\n\t\t\tthis.lineDistances.push( lineDistances[ i ] );\n\n\t\t}\n\n\t\t// bounding box\n\n\t\tvar boundingBox = source.boundingBox;\n\n\t\tif ( boundingBox !== null ) {\n\n\t\t\tthis.boundingBox = boundingBox.clone();\n\n\t\t}\n\n\t\t// bounding sphere\n\n\t\tvar boundingSphere = source.boundingSphere;\n\n\t\tif ( boundingSphere !== null ) {\n\n\t\t\tthis.boundingSphere = boundingSphere.clone();\n\n\t\t}\n\n\t\t// update flags\n\n\t\tthis.elementsNeedUpdate = source.elementsNeedUpdate;\n\t\tthis.verticesNeedUpdate = source.verticesNeedUpdate;\n\t\tthis.uvsNeedUpdate = source.uvsNeedUpdate;\n\t\tthis.normalsNeedUpdate = source.normalsNeedUpdate;\n\t\tthis.colorsNeedUpdate = source.colorsNeedUpdate;\n\t\tthis.lineDistancesNeedUpdate = source.lineDistancesNeedUpdate;\n\t\tthis.groupsNeedUpdate = source.groupsNeedUpdate;\n\n\t\treturn this;\n\n\t},\n\n\tdispose: function () {\n\n\t\tthis.dispatchEvent( { type: 'dispose' } );\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author Mugen87 / https://github.com/Mugen87\n */\n\n// BoxGeometry\n\nclass BoxGeometry extends Geometry {\n\n\tconstructor( width, height, depth, widthSegments, heightSegments, depthSegments ) {\n\n\t\tsuper();\n\n\t\tthis.type = 'BoxGeometry';\n\n\t\tthis.parameters = {\n\t\t\twidth: width,\n\t\t\theight: height,\n\t\t\tdepth: depth,\n\t\t\twidthSegments: widthSegments,\n\t\t\theightSegments: heightSegments,\n\t\t\tdepthSegments: depthSegments\n\t\t};\n\n\t\tthis.fromBufferGeometry( new BoxBufferGeometry( width, height, depth, widthSegments, heightSegments, depthSegments ) );\n\t\tthis.mergeVertices();\n\n\t}\n\n}\n\n// BoxBufferGeometry\n\nclass BoxBufferGeometry extends BufferGeometry {\n\n\tconstructor( width, height, depth, widthSegments, heightSegments, depthSegments ) {\n\n\t\tsuper();\n\n\t\tthis.type = 'BoxBufferGeometry';\n\n\t\tthis.parameters = {\n\t\t\twidth: width,\n\t\t\theight: height,\n\t\t\tdepth: depth,\n\t\t\twidthSegments: widthSegments,\n\t\t\theightSegments: heightSegments,\n\t\t\tdepthSegments: depthSegments\n\t\t};\n\n\t\tvar scope = this;\n\n\t\twidth = width || 1;\n\t\theight = height || 1;\n\t\tdepth = depth || 1;\n\n\t\t// segments\n\n\t\twidthSegments = Math.floor( widthSegments ) || 1;\n\t\theightSegments = Math.floor( heightSegments ) || 1;\n\t\tdepthSegments = Math.floor( depthSegments ) || 1;\n\n\t\t// buffers\n\n\t\tvar indices = [];\n\t\tvar vertices = [];\n\t\tvar normals = [];\n\t\tvar uvs = [];\n\n\t\t// helper variables\n\n\t\tvar numberOfVertices = 0;\n\t\tvar groupStart = 0;\n\n\t\t// build each side of the box geometry\n\n\t\tbuildPlane( 'z', 'y', 'x', - 1, - 1, depth, height, width, depthSegments, heightSegments, 0 ); // px\n\t\tbuildPlane( 'z', 'y', 'x', 1, - 1, depth, height, - width, depthSegments, heightSegments, 1 ); // nx\n\t\tbuildPlane( 'x', 'z', 'y', 1, 1, width, depth, height, widthSegments, depthSegments, 2 ); // py\n\t\tbuildPlane( 'x', 'z', 'y', 1, - 1, width, depth, - height, widthSegments, depthSegments, 3 ); // ny\n\t\tbuildPlane( 'x', 'y', 'z', 1, - 1, width, height, depth, widthSegments, heightSegments, 4 ); // pz\n\t\tbuildPlane( 'x', 'y', 'z', - 1, - 1, width, height, - depth, widthSegments, heightSegments, 5 ); // nz\n\n\t\t// build geometry\n\n\t\tthis.setIndex( indices );\n\t\tthis.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\t\tthis.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );\n\t\tthis.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );\n\n\t\tfunction buildPlane( u, v, w, udir, vdir, width, height, depth, gridX, gridY, materialIndex ) {\n\n\t\t\tvar segmentWidth = width / gridX;\n\t\t\tvar segmentHeight = height / gridY;\n\n\t\t\tvar widthHalf = width / 2;\n\t\t\tvar heightHalf = height / 2;\n\t\t\tvar depthHalf = depth / 2;\n\n\t\t\tvar gridX1 = gridX + 1;\n\t\t\tvar gridY1 = gridY + 1;\n\n\t\t\tvar vertexCounter = 0;\n\t\t\tvar groupCount = 0;\n\n\t\t\tvar ix, iy;\n\n\t\t\tvar vector = new Vector3();\n\n\t\t\t// generate vertices, normals and uvs\n\n\t\t\tfor ( iy = 0; iy < gridY1; iy ++ ) {\n\n\t\t\t\tvar y = iy * segmentHeight - heightHalf;\n\n\t\t\t\tfor ( ix = 0; ix < gridX1; ix ++ ) {\n\n\t\t\t\t\tvar x = ix * segmentWidth - widthHalf;\n\n\t\t\t\t\t// set values to correct vector component\n\n\t\t\t\t\tvector[ u ] = x * udir;\n\t\t\t\t\tvector[ v ] = y * vdir;\n\t\t\t\t\tvector[ w ] = depthHalf;\n\n\t\t\t\t\t// now apply vector to vertex buffer\n\n\t\t\t\t\tvertices.push( vector.x, vector.y, vector.z );\n\n\t\t\t\t\t// set values to correct vector component\n\n\t\t\t\t\tvector[ u ] = 0;\n\t\t\t\t\tvector[ v ] = 0;\n\t\t\t\t\tvector[ w ] = depth > 0 ? 1 : - 1;\n\n\t\t\t\t\t// now apply vector to normal buffer\n\n\t\t\t\t\tnormals.push( vector.x, vector.y, vector.z );\n\n\t\t\t\t\t// uvs\n\n\t\t\t\t\tuvs.push( ix / gridX );\n\t\t\t\t\tuvs.push( 1 - ( iy / gridY ) );\n\n\t\t\t\t\t// counters\n\n\t\t\t\t\tvertexCounter += 1;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\t// indices\n\n\t\t\t// 1. you need three indices to draw a single face\n\t\t\t// 2. a single segment consists of two faces\n\t\t\t// 3. so we need to generate six (2*3) indices per segment\n\n\t\t\tfor ( iy = 0; iy < gridY; iy ++ ) {\n\n\t\t\t\tfor ( ix = 0; ix < gridX; ix ++ ) {\n\n\t\t\t\t\tvar a = numberOfVertices + ix + gridX1 * iy;\n\t\t\t\t\tvar b = numberOfVertices + ix + gridX1 * ( iy + 1 );\n\t\t\t\t\tvar c = numberOfVertices + ( ix + 1 ) + gridX1 * ( iy + 1 );\n\t\t\t\t\tvar d = numberOfVertices + ( ix + 1 ) + gridX1 * iy;\n\n\t\t\t\t\t// faces\n\n\t\t\t\t\tindices.push( a, b, d );\n\t\t\t\t\tindices.push( b, c, d );\n\n\t\t\t\t\t// increase counter\n\n\t\t\t\t\tgroupCount += 6;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\t// add a group to the geometry. this will ensure multi material support\n\n\t\t\tscope.addGroup( groupStart, groupCount, materialIndex );\n\n\t\t\t// calculate new start value for groups\n\n\t\t\tgroupStart += groupCount;\n\n\t\t\t// update total number of vertices\n\n\t\t\tnumberOfVertices += vertexCounter;\n\n\t\t}\n\n\t}\n\n}\n\n/**\n * Uniform Utilities\n */\n\nfunction cloneUniforms( src ) {\n\n\tvar dst = {};\n\n\tfor ( var u in src ) {\n\n\t\tdst[ u ] = {};\n\n\t\tfor ( var p in src[ u ] ) {\n\n\t\t\tvar property = src[ u ][ p ];\n\n\t\t\tif ( property && ( property.isColor ||\n\t\t\t\tproperty.isMatrix3 || property.isMatrix4 ||\n\t\t\t\tproperty.isVector2 || property.isVector3 || property.isVector4 ||\n\t\t\t\tproperty.isTexture ) ) {\n\n\t\t\t\tdst[ u ][ p ] = property.clone();\n\n\t\t\t} else if ( Array.isArray( property ) ) {\n\n\t\t\t\tdst[ u ][ p ] = property.slice();\n\n\t\t\t} else {\n\n\t\t\t\tdst[ u ][ p ] = property;\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\treturn dst;\n\n}\n\nfunction mergeUniforms( uniforms ) {\n\n\tvar merged = {};\n\n\tfor ( var u = 0; u < uniforms.length; u ++ ) {\n\n\t\tvar tmp = cloneUniforms( uniforms[ u ] );\n\n\t\tfor ( var p in tmp ) {\n\n\t\t\tmerged[ p ] = tmp[ p ];\n\n\t\t}\n\n\t}\n\n\treturn merged;\n\n}\n\n// Legacy\n\nvar UniformsUtils = { clone: cloneUniforms, merge: mergeUniforms };\n\nvar default_vertex = \"void main() {\\n\\tgl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );\\n}\";\n\nvar default_fragment = \"void main() {\\n\\tgl_FragColor = vec4( 1.0, 0.0, 0.0, 1.0 );\\n}\";\n\n/**\n * @author alteredq / http://alteredqualia.com/\n *\n * parameters = {\n *  defines: { \"label\" : \"value\" },\n *  uniforms: { \"parameter1\": { value: 1.0 }, \"parameter2\": { value2: 2 } },\n *\n *  fragmentShader: <string>,\n *  vertexShader: <string>,\n *\n *  wireframe: <boolean>,\n *  wireframeLinewidth: <float>,\n *\n *  lights: <bool>,\n *\n *  skinning: <bool>,\n *  morphTargets: <bool>,\n *  morphNormals: <bool>\n * }\n */\n\nfunction ShaderMaterial( parameters ) {\n\n\tMaterial.call( this );\n\n\tthis.type = 'ShaderMaterial';\n\n\tthis.defines = {};\n\tthis.uniforms = {};\n\n\tthis.vertexShader = default_vertex;\n\tthis.fragmentShader = default_fragment;\n\n\tthis.linewidth = 1;\n\n\tthis.wireframe = false;\n\tthis.wireframeLinewidth = 1;\n\n\tthis.fog = false; // set to use scene fog\n\tthis.lights = false; // set to use scene lights\n\tthis.clipping = false; // set to use user-defined clipping planes\n\n\tthis.skinning = false; // set to use skinning attribute streams\n\tthis.morphTargets = false; // set to use morph targets\n\tthis.morphNormals = false; // set to use morph normals\n\n\tthis.extensions = {\n\t\tderivatives: false, // set to use derivatives\n\t\tfragDepth: false, // set to use fragment depth values\n\t\tdrawBuffers: false, // set to use draw buffers\n\t\tshaderTextureLOD: false // set to use shader texture LOD\n\t};\n\n\t// When rendered geometry doesn't include these attributes but the material does,\n\t// use these default values in WebGL. This avoids errors when buffer data is missing.\n\tthis.defaultAttributeValues = {\n\t\t'color': [ 1, 1, 1 ],\n\t\t'uv': [ 0, 0 ],\n\t\t'uv2': [ 0, 0 ]\n\t};\n\n\tthis.index0AttributeName = undefined;\n\tthis.uniformsNeedUpdate = false;\n\n\tif ( parameters !== undefined ) {\n\n\t\tif ( parameters.attributes !== undefined ) {\n\n\t\t\tconsole.error( 'THREE.ShaderMaterial: attributes should now be defined in THREE.BufferGeometry instead.' );\n\n\t\t}\n\n\t\tthis.setValues( parameters );\n\n\t}\n\n}\n\nShaderMaterial.prototype = Object.create( Material.prototype );\nShaderMaterial.prototype.constructor = ShaderMaterial;\n\nShaderMaterial.prototype.isShaderMaterial = true;\n\nShaderMaterial.prototype.copy = function ( source ) {\n\n\tMaterial.prototype.copy.call( this, source );\n\n\tthis.fragmentShader = source.fragmentShader;\n\tthis.vertexShader = source.vertexShader;\n\n\tthis.uniforms = cloneUniforms( source.uniforms );\n\n\tthis.defines = Object.assign( {}, source.defines );\n\n\tthis.wireframe = source.wireframe;\n\tthis.wireframeLinewidth = source.wireframeLinewidth;\n\n\tthis.lights = source.lights;\n\tthis.clipping = source.clipping;\n\n\tthis.skinning = source.skinning;\n\n\tthis.morphTargets = source.morphTargets;\n\tthis.morphNormals = source.morphNormals;\n\n\tthis.extensions = source.extensions;\n\n\treturn this;\n\n};\n\nShaderMaterial.prototype.toJSON = function ( meta ) {\n\n\tvar data = Material.prototype.toJSON.call( this, meta );\n\n\tdata.uniforms = {};\n\n\tfor ( var name in this.uniforms ) {\n\n\t\tvar uniform = this.uniforms[ name ];\n\t\tvar value = uniform.value;\n\n\t\tif ( value && value.isTexture ) {\n\n\t\t\tdata.uniforms[ name ] = {\n\t\t\t\ttype: 't',\n\t\t\t\tvalue: value.toJSON( meta ).uuid\n\t\t\t};\n\n\t\t} else if ( value && value.isColor ) {\n\n\t\t\tdata.uniforms[ name ] = {\n\t\t\t\ttype: 'c',\n\t\t\t\tvalue: value.getHex()\n\t\t\t};\n\n\t\t} else if ( value && value.isVector2 ) {\n\n\t\t\tdata.uniforms[ name ] = {\n\t\t\t\ttype: 'v2',\n\t\t\t\tvalue: value.toArray()\n\t\t\t};\n\n\t\t} else if ( value && value.isVector3 ) {\n\n\t\t\tdata.uniforms[ name ] = {\n\t\t\t\ttype: 'v3',\n\t\t\t\tvalue: value.toArray()\n\t\t\t};\n\n\t\t} else if ( value && value.isVector4 ) {\n\n\t\t\tdata.uniforms[ name ] = {\n\t\t\t\ttype: 'v4',\n\t\t\t\tvalue: value.toArray()\n\t\t\t};\n\n\t\t} else if ( value && value.isMatrix3 ) {\n\n\t\t\tdata.uniforms[ name ] = {\n\t\t\t\ttype: 'm3',\n\t\t\t\tvalue: value.toArray()\n\t\t\t};\n\n\t\t} else if ( value && value.isMatrix4 ) {\n\n\t\t\tdata.uniforms[ name ] = {\n\t\t\t\ttype: 'm4',\n\t\t\t\tvalue: value.toArray()\n\t\t\t};\n\n\t\t} else {\n\n\t\t\tdata.uniforms[ name ] = {\n\t\t\t\tvalue: value\n\t\t\t};\n\n\t\t\t// note: the array variants v2v, v3v, v4v, m4v and tv are not supported so far\n\n\t\t}\n\n\t}\n\n\tif ( Object.keys( this.defines ).length > 0 ) data.defines = this.defines;\n\n\tdata.vertexShader = this.vertexShader;\n\tdata.fragmentShader = this.fragmentShader;\n\n\tvar extensions = {};\n\n\tfor ( var key in this.extensions ) {\n\n\t\tif ( this.extensions[ key ] === true ) extensions[ key ] = true;\n\n\t}\n\n\tif ( Object.keys( extensions ).length > 0 ) data.extensions = extensions;\n\n\treturn data;\n\n};\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author mikael emtinger / http://gomo.se/\n * @author WestLangley / http://github.com/WestLangley\n*/\n\nfunction Camera() {\n\n\tObject3D.call( this );\n\n\tthis.type = 'Camera';\n\n\tthis.matrixWorldInverse = new Matrix4();\n\n\tthis.projectionMatrix = new Matrix4();\n\tthis.projectionMatrixInverse = new Matrix4();\n\n}\n\nCamera.prototype = Object.assign( Object.create( Object3D.prototype ), {\n\n\tconstructor: Camera,\n\n\tisCamera: true,\n\n\tcopy: function ( source, recursive ) {\n\n\t\tObject3D.prototype.copy.call( this, source, recursive );\n\n\t\tthis.matrixWorldInverse.copy( source.matrixWorldInverse );\n\n\t\tthis.projectionMatrix.copy( source.projectionMatrix );\n\t\tthis.projectionMatrixInverse.copy( source.projectionMatrixInverse );\n\n\t\treturn this;\n\n\t},\n\n\tgetWorldDirection: function ( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Camera: .getWorldDirection() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\tthis.updateMatrixWorld( true );\n\n\t\tvar e = this.matrixWorld.elements;\n\n\t\treturn target.set( - e[ 8 ], - e[ 9 ], - e[ 10 ] ).normalize();\n\n\t},\n\n\tupdateMatrixWorld: function ( force ) {\n\n\t\tObject3D.prototype.updateMatrixWorld.call( this, force );\n\n\t\tthis.matrixWorldInverse.getInverse( this.matrixWorld );\n\n\t},\n\n\tupdateWorldMatrix: function ( updateParents, updateChildren ) {\n\n\t\tObject3D.prototype.updateWorldMatrix.call( this, updateParents, updateChildren );\n\n\t\tthis.matrixWorldInverse.getInverse( this.matrixWorld );\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor().copy( this );\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author greggman / http://games.greggman.com/\n * @author zz85 / http://www.lab4games.net/zz85/blog\n * @author tschw\n */\n\nfunction PerspectiveCamera( fov, aspect, near, far ) {\n\n\tCamera.call( this );\n\n\tthis.type = 'PerspectiveCamera';\n\n\tthis.fov = fov !== undefined ? fov : 50;\n\tthis.zoom = 1;\n\n\tthis.near = near !== undefined ? near : 0.1;\n\tthis.far = far !== undefined ? far : 2000;\n\tthis.focus = 10;\n\n\tthis.aspect = aspect !== undefined ? aspect : 1;\n\tthis.view = null;\n\n\tthis.filmGauge = 35;\t// width of the film (default in millimeters)\n\tthis.filmOffset = 0;\t// horizontal film offset (same unit as gauge)\n\n\tthis.updateProjectionMatrix();\n\n}\n\nPerspectiveCamera.prototype = Object.assign( Object.create( Camera.prototype ), {\n\n\tconstructor: PerspectiveCamera,\n\n\tisPerspectiveCamera: true,\n\n\tcopy: function ( source, recursive ) {\n\n\t\tCamera.prototype.copy.call( this, source, recursive );\n\n\t\tthis.fov = source.fov;\n\t\tthis.zoom = source.zoom;\n\n\t\tthis.near = source.near;\n\t\tthis.far = source.far;\n\t\tthis.focus = source.focus;\n\n\t\tthis.aspect = source.aspect;\n\t\tthis.view = source.view === null ? null : Object.assign( {}, source.view );\n\n\t\tthis.filmGauge = source.filmGauge;\n\t\tthis.filmOffset = source.filmOffset;\n\n\t\treturn this;\n\n\t},\n\n\t/**\n\t * Sets the FOV by focal length in respect to the current .filmGauge.\n\t *\n\t * The default film gauge is 35, so that the focal length can be specified for\n\t * a 35mm (full frame) camera.\n\t *\n\t * Values for focal length and film gauge must have the same unit.\n\t */\n\tsetFocalLength: function ( focalLength ) {\n\n\t\t// see http://www.bobatkins.com/photography/technical/field_of_view.html\n\t\tvar vExtentSlope = 0.5 * this.getFilmHeight() / focalLength;\n\n\t\tthis.fov = MathUtils.RAD2DEG * 2 * Math.atan( vExtentSlope );\n\t\tthis.updateProjectionMatrix();\n\n\t},\n\n\t/**\n\t * Calculates the focal length from the current .fov and .filmGauge.\n\t */\n\tgetFocalLength: function () {\n\n\t\tvar vExtentSlope = Math.tan( MathUtils.DEG2RAD * 0.5 * this.fov );\n\n\t\treturn 0.5 * this.getFilmHeight() / vExtentSlope;\n\n\t},\n\n\tgetEffectiveFOV: function () {\n\n\t\treturn MathUtils.RAD2DEG * 2 * Math.atan(\n\t\t\tMath.tan( MathUtils.DEG2RAD * 0.5 * this.fov ) / this.zoom );\n\n\t},\n\n\tgetFilmWidth: function () {\n\n\t\t// film not completely covered in portrait format (aspect < 1)\n\t\treturn this.filmGauge * Math.min( this.aspect, 1 );\n\n\t},\n\n\tgetFilmHeight: function () {\n\n\t\t// film not completely covered in landscape format (aspect > 1)\n\t\treturn this.filmGauge / Math.max( this.aspect, 1 );\n\n\t},\n\n\t/**\n\t * Sets an offset in a larger frustum. This is useful for multi-window or\n\t * multi-monitor/multi-machine setups.\n\t *\n\t * For example, if you have 3x2 monitors and each monitor is 1920x1080 and\n\t * the monitors are in grid like this\n\t *\n\t *   +---+---+---+\n\t *   | A | B | C |\n\t *   +---+---+---+\n\t *   | D | E | F |\n\t *   +---+---+---+\n\t *\n\t * then for each monitor you would call it like this\n\t *\n\t *   var w = 1920;\n\t *   var h = 1080;\n\t *   var fullWidth = w * 3;\n\t *   var fullHeight = h * 2;\n\t *\n\t *   --A--\n\t *   camera.setViewOffset( fullWidth, fullHeight, w * 0, h * 0, w, h );\n\t *   --B--\n\t *   camera.setViewOffset( fullWidth, fullHeight, w * 1, h * 0, w, h );\n\t *   --C--\n\t *   camera.setViewOffset( fullWidth, fullHeight, w * 2, h * 0, w, h );\n\t *   --D--\n\t *   camera.setViewOffset( fullWidth, fullHeight, w * 0, h * 1, w, h );\n\t *   --E--\n\t *   camera.setViewOffset( fullWidth, fullHeight, w * 1, h * 1, w, h );\n\t *   --F--\n\t *   camera.setViewOffset( fullWidth, fullHeight, w * 2, h * 1, w, h );\n\t *\n\t *   Note there is no reason monitors have to be the same size or in a grid.\n\t */\n\tsetViewOffset: function ( fullWidth, fullHeight, x, y, width, height ) {\n\n\t\tthis.aspect = fullWidth / fullHeight;\n\n\t\tif ( this.view === null ) {\n\n\t\t\tthis.view = {\n\t\t\t\tenabled: true,\n\t\t\t\tfullWidth: 1,\n\t\t\t\tfullHeight: 1,\n\t\t\t\toffsetX: 0,\n\t\t\t\toffsetY: 0,\n\t\t\t\twidth: 1,\n\t\t\t\theight: 1\n\t\t\t};\n\n\t\t}\n\n\t\tthis.view.enabled = true;\n\t\tthis.view.fullWidth = fullWidth;\n\t\tthis.view.fullHeight = fullHeight;\n\t\tthis.view.offsetX = x;\n\t\tthis.view.offsetY = y;\n\t\tthis.view.width = width;\n\t\tthis.view.height = height;\n\n\t\tthis.updateProjectionMatrix();\n\n\t},\n\n\tclearViewOffset: function () {\n\n\t\tif ( this.view !== null ) {\n\n\t\t\tthis.view.enabled = false;\n\n\t\t}\n\n\t\tthis.updateProjectionMatrix();\n\n\t},\n\n\tupdateProjectionMatrix: function () {\n\n\t\tvar near = this.near,\n\t\t\ttop = near * Math.tan( MathUtils.DEG2RAD * 0.5 * this.fov ) / this.zoom,\n\t\t\theight = 2 * top,\n\t\t\twidth = this.aspect * height,\n\t\t\tleft = - 0.5 * width,\n\t\t\tview = this.view;\n\n\t\tif ( this.view !== null && this.view.enabled ) {\n\n\t\t\tvar fullWidth = view.fullWidth,\n\t\t\t\tfullHeight = view.fullHeight;\n\n\t\t\tleft += view.offsetX * width / fullWidth;\n\t\t\ttop -= view.offsetY * height / fullHeight;\n\t\t\twidth *= view.width / fullWidth;\n\t\t\theight *= view.height / fullHeight;\n\n\t\t}\n\n\t\tvar skew = this.filmOffset;\n\t\tif ( skew !== 0 ) left += near * skew / this.getFilmWidth();\n\n\t\tthis.projectionMatrix.makePerspective( left, left + width, top, top - height, near, this.far );\n\n\t\tthis.projectionMatrixInverse.getInverse( this.projectionMatrix );\n\n\t},\n\n\ttoJSON: function ( meta ) {\n\n\t\tvar data = Object3D.prototype.toJSON.call( this, meta );\n\n\t\tdata.object.fov = this.fov;\n\t\tdata.object.zoom = this.zoom;\n\n\t\tdata.object.near = this.near;\n\t\tdata.object.far = this.far;\n\t\tdata.object.focus = this.focus;\n\n\t\tdata.object.aspect = this.aspect;\n\n\t\tif ( this.view !== null ) data.object.view = Object.assign( {}, this.view );\n\n\t\tdata.object.filmGauge = this.filmGauge;\n\t\tdata.object.filmOffset = this.filmOffset;\n\n\t\treturn data;\n\n\t}\n\n} );\n\n/**\n * Camera for rendering cube maps\n *\t- renders scene into axis-aligned cube\n *\n * @author alteredq / http://alteredqualia.com/\n */\n\nvar fov = 90, aspect = 1;\n\nfunction CubeCamera( near, far, cubeResolution, options ) {\n\n\tObject3D.call( this );\n\n\tthis.type = 'CubeCamera';\n\n\tvar cameraPX = new PerspectiveCamera( fov, aspect, near, far );\n\tcameraPX.up.set( 0, - 1, 0 );\n\tcameraPX.lookAt( new Vector3( 1, 0, 0 ) );\n\tthis.add( cameraPX );\n\n\tvar cameraNX = new PerspectiveCamera( fov, aspect, near, far );\n\tcameraNX.up.set( 0, - 1, 0 );\n\tcameraNX.lookAt( new Vector3( - 1, 0, 0 ) );\n\tthis.add( cameraNX );\n\n\tvar cameraPY = new PerspectiveCamera( fov, aspect, near, far );\n\tcameraPY.up.set( 0, 0, 1 );\n\tcameraPY.lookAt( new Vector3( 0, 1, 0 ) );\n\tthis.add( cameraPY );\n\n\tvar cameraNY = new PerspectiveCamera( fov, aspect, near, far );\n\tcameraNY.up.set( 0, 0, - 1 );\n\tcameraNY.lookAt( new Vector3( 0, - 1, 0 ) );\n\tthis.add( cameraNY );\n\n\tvar cameraPZ = new PerspectiveCamera( fov, aspect, near, far );\n\tcameraPZ.up.set( 0, - 1, 0 );\n\tcameraPZ.lookAt( new Vector3( 0, 0, 1 ) );\n\tthis.add( cameraPZ );\n\n\tvar cameraNZ = new PerspectiveCamera( fov, aspect, near, far );\n\tcameraNZ.up.set( 0, - 1, 0 );\n\tcameraNZ.lookAt( new Vector3( 0, 0, - 1 ) );\n\tthis.add( cameraNZ );\n\n\toptions = options || { format: RGBFormat, magFilter: LinearFilter, minFilter: LinearFilter };\n\n\tthis.renderTarget = new WebGLCubeRenderTarget( cubeResolution, options );\n\tthis.renderTarget.texture.name = \"CubeCamera\";\n\n\tthis.update = function ( renderer, scene ) {\n\n\t\tif ( this.parent === null ) this.updateMatrixWorld();\n\n\t\tvar currentRenderTarget = renderer.getRenderTarget();\n\n\t\tvar renderTarget = this.renderTarget;\n\t\tvar generateMipmaps = renderTarget.texture.generateMipmaps;\n\n\t\trenderTarget.texture.generateMipmaps = false;\n\n\t\trenderer.setRenderTarget( renderTarget, 0 );\n\t\trenderer.render( scene, cameraPX );\n\n\t\trenderer.setRenderTarget( renderTarget, 1 );\n\t\trenderer.render( scene, cameraNX );\n\n\t\trenderer.setRenderTarget( renderTarget, 2 );\n\t\trenderer.render( scene, cameraPY );\n\n\t\trenderer.setRenderTarget( renderTarget, 3 );\n\t\trenderer.render( scene, cameraNY );\n\n\t\trenderer.setRenderTarget( renderTarget, 4 );\n\t\trenderer.render( scene, cameraPZ );\n\n\t\trenderTarget.texture.generateMipmaps = generateMipmaps;\n\n\t\trenderer.setRenderTarget( renderTarget, 5 );\n\t\trenderer.render( scene, cameraNZ );\n\n\t\trenderer.setRenderTarget( currentRenderTarget );\n\n\t};\n\n\tthis.clear = function ( renderer, color, depth, stencil ) {\n\n\t\tvar currentRenderTarget = renderer.getRenderTarget();\n\n\t\tvar renderTarget = this.renderTarget;\n\n\t\tfor ( var i = 0; i < 6; i ++ ) {\n\n\t\t\trenderer.setRenderTarget( renderTarget, i );\n\n\t\t\trenderer.clear( color, depth, stencil );\n\n\t\t}\n\n\t\trenderer.setRenderTarget( currentRenderTarget );\n\n\t};\n\n}\n\nCubeCamera.prototype = Object.create( Object3D.prototype );\nCubeCamera.prototype.constructor = CubeCamera;\n\n/**\n * @author alteredq / http://alteredqualia.com\n * @author WestLangley / http://github.com/WestLangley\n */\n\nfunction WebGLCubeRenderTarget( size, options, dummy ) {\n\n\tif ( Number.isInteger( options ) ) {\n\n\t\tconsole.warn( 'THREE.WebGLCubeRenderTarget: constructor signature is now WebGLCubeRenderTarget( size, options )' );\n\n\t\toptions = dummy;\n\n\t}\n\n\tWebGLRenderTarget.call( this, size, size, options );\n\n}\n\nWebGLCubeRenderTarget.prototype = Object.create( WebGLRenderTarget.prototype );\nWebGLCubeRenderTarget.prototype.constructor = WebGLCubeRenderTarget;\n\nWebGLCubeRenderTarget.prototype.isWebGLCubeRenderTarget = true;\n\nWebGLCubeRenderTarget.prototype.fromEquirectangularTexture = function ( renderer, texture ) {\n\n\tthis.texture.type = texture.type;\n\tthis.texture.format = texture.format;\n\tthis.texture.encoding = texture.encoding;\n\n\tvar scene = new Scene();\n\n\tvar shader = {\n\n\t\tuniforms: {\n\t\t\ttEquirect: { value: null },\n\t\t},\n\n\t\tvertexShader: [\n\n\t\t\t\"varying vec3 vWorldDirection;\",\n\n\t\t\t\"vec3 transformDirection( in vec3 dir, in mat4 matrix ) {\",\n\n\t\t\t\"\treturn normalize( ( matrix * vec4( dir, 0.0 ) ).xyz );\",\n\n\t\t\t\"}\",\n\n\t\t\t\"void main() {\",\n\n\t\t\t\"\tvWorldDirection = transformDirection( position, modelMatrix );\",\n\n\t\t\t\"\t#include <begin_vertex>\",\n\t\t\t\"\t#include <project_vertex>\",\n\n\t\t\t\"}\"\n\n\t\t].join( '\\n' ),\n\n\t\tfragmentShader: [\n\n\t\t\t\"uniform sampler2D tEquirect;\",\n\n\t\t\t\"varying vec3 vWorldDirection;\",\n\n\t\t\t\"#define RECIPROCAL_PI 0.31830988618\",\n\t\t\t\"#define RECIPROCAL_PI2 0.15915494\",\n\n\t\t\t\"void main() {\",\n\n\t\t\t\"\tvec3 direction = normalize( vWorldDirection );\",\n\n\t\t\t\"\tvec2 sampleUV;\",\n\n\t\t\t\"\tsampleUV.y = asin( clamp( direction.y, - 1.0, 1.0 ) ) * RECIPROCAL_PI + 0.5;\",\n\n\t\t\t\"\tsampleUV.x = atan( direction.z, direction.x ) * RECIPROCAL_PI2 + 0.5;\",\n\n\t\t\t\"\tgl_FragColor = texture2D( tEquirect, sampleUV );\",\n\n\t\t\t\"}\"\n\n\t\t].join( '\\n' ),\n\t};\n\n\tvar material = new ShaderMaterial( {\n\n\t\ttype: 'CubemapFromEquirect',\n\n\t\tuniforms: cloneUniforms( shader.uniforms ),\n\t\tvertexShader: shader.vertexShader,\n\t\tfragmentShader: shader.fragmentShader,\n\t\tside: BackSide,\n\t\tblending: NoBlending\n\n\t} );\n\n\tmaterial.uniforms.tEquirect.value = texture;\n\n\tvar mesh = new Mesh( new BoxBufferGeometry( 5, 5, 5 ), material );\n\n\tscene.add( mesh );\n\n\tvar camera = new CubeCamera( 1, 10, 1 );\n\n\tcamera.renderTarget = this;\n\tcamera.renderTarget.texture.name = 'CubeCameraTexture';\n\n\tcamera.update( renderer, scene );\n\n\tmesh.geometry.dispose();\n\tmesh.material.dispose();\n\n\treturn this;\n\n};\n\n/**\n * @author alteredq / http://alteredqualia.com/\n */\n\nfunction DataTexture( data, width, height, format, type, mapping, wrapS, wrapT, magFilter, minFilter, anisotropy, encoding ) {\n\n\tTexture.call( this, null, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding );\n\n\tthis.image = { data: data || null, width: width || 1, height: height || 1 };\n\n\tthis.magFilter = magFilter !== undefined ? magFilter : NearestFilter;\n\tthis.minFilter = minFilter !== undefined ? minFilter : NearestFilter;\n\n\tthis.generateMipmaps = false;\n\tthis.flipY = false;\n\tthis.unpackAlignment = 1;\n\n\tthis.needsUpdate = true;\n\n}\n\nDataTexture.prototype = Object.create( Texture.prototype );\nDataTexture.prototype.constructor = DataTexture;\n\nDataTexture.prototype.isDataTexture = true;\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n * @author bhouston / http://clara.io\n */\n\nvar _sphere$1 = new Sphere();\nvar _vector$5 = new Vector3();\n\nfunction Frustum( p0, p1, p2, p3, p4, p5 ) {\n\n\tthis.planes = [\n\n\t\t( p0 !== undefined ) ? p0 : new Plane(),\n\t\t( p1 !== undefined ) ? p1 : new Plane(),\n\t\t( p2 !== undefined ) ? p2 : new Plane(),\n\t\t( p3 !== undefined ) ? p3 : new Plane(),\n\t\t( p4 !== undefined ) ? p4 : new Plane(),\n\t\t( p5 !== undefined ) ? p5 : new Plane()\n\n\t];\n\n}\n\nObject.assign( Frustum.prototype, {\n\n\tset: function ( p0, p1, p2, p3, p4, p5 ) {\n\n\t\tvar planes = this.planes;\n\n\t\tplanes[ 0 ].copy( p0 );\n\t\tplanes[ 1 ].copy( p1 );\n\t\tplanes[ 2 ].copy( p2 );\n\t\tplanes[ 3 ].copy( p3 );\n\t\tplanes[ 4 ].copy( p4 );\n\t\tplanes[ 5 ].copy( p5 );\n\n\t\treturn this;\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor().copy( this );\n\n\t},\n\n\tcopy: function ( frustum ) {\n\n\t\tvar planes = this.planes;\n\n\t\tfor ( var i = 0; i < 6; i ++ ) {\n\n\t\t\tplanes[ i ].copy( frustum.planes[ i ] );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tsetFromProjectionMatrix: function ( m ) {\n\n\t\tvar planes = this.planes;\n\t\tvar me = m.elements;\n\t\tvar me0 = me[ 0 ], me1 = me[ 1 ], me2 = me[ 2 ], me3 = me[ 3 ];\n\t\tvar me4 = me[ 4 ], me5 = me[ 5 ], me6 = me[ 6 ], me7 = me[ 7 ];\n\t\tvar me8 = me[ 8 ], me9 = me[ 9 ], me10 = me[ 10 ], me11 = me[ 11 ];\n\t\tvar me12 = me[ 12 ], me13 = me[ 13 ], me14 = me[ 14 ], me15 = me[ 15 ];\n\n\t\tplanes[ 0 ].setComponents( me3 - me0, me7 - me4, me11 - me8, me15 - me12 ).normalize();\n\t\tplanes[ 1 ].setComponents( me3 + me0, me7 + me4, me11 + me8, me15 + me12 ).normalize();\n\t\tplanes[ 2 ].setComponents( me3 + me1, me7 + me5, me11 + me9, me15 + me13 ).normalize();\n\t\tplanes[ 3 ].setComponents( me3 - me1, me7 - me5, me11 - me9, me15 - me13 ).normalize();\n\t\tplanes[ 4 ].setComponents( me3 - me2, me7 - me6, me11 - me10, me15 - me14 ).normalize();\n\t\tplanes[ 5 ].setComponents( me3 + me2, me7 + me6, me11 + me10, me15 + me14 ).normalize();\n\n\t\treturn this;\n\n\t},\n\n\tintersectsObject: function ( object ) {\n\n\t\tvar geometry = object.geometry;\n\n\t\tif ( geometry.boundingSphere === null ) geometry.computeBoundingSphere();\n\n\t\t_sphere$1.copy( geometry.boundingSphere ).applyMatrix4( object.matrixWorld );\n\n\t\treturn this.intersectsSphere( _sphere$1 );\n\n\t},\n\n\tintersectsSprite: function ( sprite ) {\n\n\t\t_sphere$1.center.set( 0, 0, 0 );\n\t\t_sphere$1.radius = 0.7071067811865476;\n\t\t_sphere$1.applyMatrix4( sprite.matrixWorld );\n\n\t\treturn this.intersectsSphere( _sphere$1 );\n\n\t},\n\n\tintersectsSphere: function ( sphere ) {\n\n\t\tvar planes = this.planes;\n\t\tvar center = sphere.center;\n\t\tvar negRadius = - sphere.radius;\n\n\t\tfor ( var i = 0; i < 6; i ++ ) {\n\n\t\t\tvar distance = planes[ i ].distanceToPoint( center );\n\n\t\t\tif ( distance < negRadius ) {\n\n\t\t\t\treturn false;\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn true;\n\n\t},\n\n\tintersectsBox: function ( box ) {\n\n\t\tvar planes = this.planes;\n\n\t\tfor ( var i = 0; i < 6; i ++ ) {\n\n\t\t\tvar plane = planes[ i ];\n\n\t\t\t// corner at max distance\n\n\t\t\t_vector$5.x = plane.normal.x > 0 ? box.max.x : box.min.x;\n\t\t\t_vector$5.y = plane.normal.y > 0 ? box.max.y : box.min.y;\n\t\t\t_vector$5.z = plane.normal.z > 0 ? box.max.z : box.min.z;\n\n\t\t\tif ( plane.distanceToPoint( _vector$5 ) < 0 ) {\n\n\t\t\t\treturn false;\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn true;\n\n\t},\n\n\tcontainsPoint: function ( point ) {\n\n\t\tvar planes = this.planes;\n\n\t\tfor ( var i = 0; i < 6; i ++ ) {\n\n\t\t\tif ( planes[ i ].distanceToPoint( point ) < 0 ) {\n\n\t\t\t\treturn false;\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn true;\n\n\t}\n\n} );\n\n/**\n * Uniforms library for shared webgl shaders\n */\n\nvar UniformsLib = {\n\n\tcommon: {\n\n\t\tdiffuse: { value: new Color( 0xeeeeee ) },\n\t\topacity: { value: 1.0 },\n\n\t\tmap: { value: null },\n\t\tuvTransform: { value: new Matrix3() },\n\t\tuv2Transform: { value: new Matrix3() },\n\n\t\talphaMap: { value: null },\n\n\t},\n\n\tspecularmap: {\n\n\t\tspecularMap: { value: null },\n\n\t},\n\n\tenvmap: {\n\n\t\tenvMap: { value: null },\n\t\tflipEnvMap: { value: - 1 },\n\t\treflectivity: { value: 1.0 },\n\t\trefractionRatio: { value: 0.98 },\n\t\tmaxMipLevel: { value: 0 }\n\n\t},\n\n\taomap: {\n\n\t\taoMap: { value: null },\n\t\taoMapIntensity: { value: 1 }\n\n\t},\n\n\tlightmap: {\n\n\t\tlightMap: { value: null },\n\t\tlightMapIntensity: { value: 1 }\n\n\t},\n\n\temissivemap: {\n\n\t\temissiveMap: { value: null }\n\n\t},\n\n\tbumpmap: {\n\n\t\tbumpMap: { value: null },\n\t\tbumpScale: { value: 1 }\n\n\t},\n\n\tnormalmap: {\n\n\t\tnormalMap: { value: null },\n\t\tnormalScale: { value: new Vector2( 1, 1 ) }\n\n\t},\n\n\tdisplacementmap: {\n\n\t\tdisplacementMap: { value: null },\n\t\tdisplacementScale: { value: 1 },\n\t\tdisplacementBias: { value: 0 }\n\n\t},\n\n\troughnessmap: {\n\n\t\troughnessMap: { value: null }\n\n\t},\n\n\tmetalnessmap: {\n\n\t\tmetalnessMap: { value: null }\n\n\t},\n\n\tgradientmap: {\n\n\t\tgradientMap: { value: null }\n\n\t},\n\n\tfog: {\n\n\t\tfogDensity: { value: 0.00025 },\n\t\tfogNear: { value: 1 },\n\t\tfogFar: { value: 2000 },\n\t\tfogColor: { value: new Color( 0xffffff ) }\n\n\t},\n\n\tlights: {\n\n\t\tambientLightColor: { value: [] },\n\n\t\tlightProbe: { value: [] },\n\n\t\tdirectionalLights: { value: [], properties: {\n\t\t\tdirection: {},\n\t\t\tcolor: {}\n\t\t} },\n\n\t\tdirectionalLightShadows: { value: [], properties: {\n\t\t\tshadowBias: {},\n\t\t\tshadowRadius: {},\n\t\t\tshadowMapSize: {}\n\t\t} },\n\n\t\tdirectionalShadowMap: { value: [] },\n\t\tdirectionalShadowMatrix: { value: [] },\n\n\t\tspotLights: { value: [], properties: {\n\t\t\tcolor: {},\n\t\t\tposition: {},\n\t\t\tdirection: {},\n\t\t\tdistance: {},\n\t\t\tconeCos: {},\n\t\t\tpenumbraCos: {},\n\t\t\tdecay: {}\n\t\t} },\n\n\t\tspotLightShadows: { value: [], properties: {\n\t\t\tshadowBias: {},\n\t\t\tshadowRadius: {},\n\t\t\tshadowMapSize: {}\n\t\t} },\n\n\t\tspotShadowMap: { value: [] },\n\t\tspotShadowMatrix: { value: [] },\n\n\t\tpointLights: { value: [], properties: {\n\t\t\tcolor: {},\n\t\t\tposition: {},\n\t\t\tdecay: {},\n\t\t\tdistance: {}\n\t\t} },\n\n\t\tpointLightShadows: { value: [], properties: {\n\t\t\tshadowBias: {},\n\t\t\tshadowRadius: {},\n\t\t\tshadowMapSize: {},\n\t\t\tshadowCameraNear: {},\n\t\t\tshadowCameraFar: {}\n\t\t} },\n\n\t\tpointShadowMap: { value: [] },\n\t\tpointShadowMatrix: { value: [] },\n\n\t\themisphereLights: { value: [], properties: {\n\t\t\tdirection: {},\n\t\t\tskyColor: {},\n\t\t\tgroundColor: {}\n\t\t} },\n\n\t\t// TODO (abelnation): RectAreaLight BRDF data needs to be moved from example to main src\n\t\trectAreaLights: { value: [], properties: {\n\t\t\tcolor: {},\n\t\t\tposition: {},\n\t\t\twidth: {},\n\t\t\theight: {}\n\t\t} }\n\n\t},\n\n\tpoints: {\n\n\t\tdiffuse: { value: new Color( 0xeeeeee ) },\n\t\topacity: { value: 1.0 },\n\t\tsize: { value: 1.0 },\n\t\tscale: { value: 1.0 },\n\t\tmap: { value: null },\n\t\talphaMap: { value: null },\n\t\tuvTransform: { value: new Matrix3() }\n\n\t},\n\n\tsprite: {\n\n\t\tdiffuse: { value: new Color( 0xeeeeee ) },\n\t\topacity: { value: 1.0 },\n\t\tcenter: { value: new Vector2( 0.5, 0.5 ) },\n\t\trotation: { value: 0.0 },\n\t\tmap: { value: null },\n\t\talphaMap: { value: null },\n\t\tuvTransform: { value: new Matrix3() }\n\n\t}\n\n};\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction WebGLAnimation() {\n\n\tvar context = null;\n\tvar isAnimating = false;\n\tvar animationLoop = null;\n\n\tfunction onAnimationFrame( time, frame ) {\n\n\t\tif ( isAnimating === false ) return;\n\n\t\tanimationLoop( time, frame );\n\n\t\tcontext.requestAnimationFrame( onAnimationFrame );\n\n\t}\n\n\treturn {\n\n\t\tstart: function () {\n\n\t\t\tif ( isAnimating === true ) return;\n\t\t\tif ( animationLoop === null ) return;\n\n\t\t\tcontext.requestAnimationFrame( onAnimationFrame );\n\n\t\t\tisAnimating = true;\n\n\t\t},\n\n\t\tstop: function () {\n\n\t\t\tisAnimating = false;\n\n\t\t},\n\n\t\tsetAnimationLoop: function ( callback ) {\n\n\t\t\tanimationLoop = callback;\n\n\t\t},\n\n\t\tsetContext: function ( value ) {\n\n\t\t\tcontext = value;\n\n\t\t}\n\n\t};\n\n}\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction WebGLAttributes( gl, capabilities ) {\n\n\tvar isWebGL2 = capabilities.isWebGL2;\n\n\tvar buffers = new WeakMap();\n\n\tfunction createBuffer( attribute, bufferType ) {\n\n\t\tvar array = attribute.array;\n\t\tvar usage = attribute.usage;\n\n\t\tvar buffer = gl.createBuffer();\n\n\t\tgl.bindBuffer( bufferType, buffer );\n\t\tgl.bufferData( bufferType, array, usage );\n\n\t\tattribute.onUploadCallback();\n\n\t\tvar type = 5126;\n\n\t\tif ( array instanceof Float32Array ) {\n\n\t\t\ttype = 5126;\n\n\t\t} else if ( array instanceof Float64Array ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLAttributes: Unsupported data buffer format: Float64Array.' );\n\n\t\t} else if ( array instanceof Uint16Array ) {\n\n\t\t\ttype = 5123;\n\n\t\t} else if ( array instanceof Int16Array ) {\n\n\t\t\ttype = 5122;\n\n\t\t} else if ( array instanceof Uint32Array ) {\n\n\t\t\ttype = 5125;\n\n\t\t} else if ( array instanceof Int32Array ) {\n\n\t\t\ttype = 5124;\n\n\t\t} else if ( array instanceof Int8Array ) {\n\n\t\t\ttype = 5120;\n\n\t\t} else if ( array instanceof Uint8Array ) {\n\n\t\t\ttype = 5121;\n\n\t\t}\n\n\t\treturn {\n\t\t\tbuffer: buffer,\n\t\t\ttype: type,\n\t\t\tbytesPerElement: array.BYTES_PER_ELEMENT,\n\t\t\tversion: attribute.version\n\t\t};\n\n\t}\n\n\tfunction updateBuffer( buffer, attribute, bufferType ) {\n\n\t\tvar array = attribute.array;\n\t\tvar updateRange = attribute.updateRange;\n\n\t\tgl.bindBuffer( bufferType, buffer );\n\n\t\tif ( updateRange.count === - 1 ) {\n\n\t\t\t// Not using update ranges\n\n\t\t\tgl.bufferSubData( bufferType, 0, array );\n\n\t\t} else {\n\n\t\t\tif ( isWebGL2 ) {\n\n\t\t\t\tgl.bufferSubData( bufferType, updateRange.offset * array.BYTES_PER_ELEMENT,\n\t\t\t\t\tarray, updateRange.offset, updateRange.count );\n\n\t\t\t} else {\n\n\t\t\t\tgl.bufferSubData( bufferType, updateRange.offset * array.BYTES_PER_ELEMENT,\n\t\t\t\t\tarray.subarray( updateRange.offset, updateRange.offset + updateRange.count ) );\n\n\t\t\t}\n\n\t\t\tupdateRange.count = - 1; // reset range\n\n\t\t}\n\n\t}\n\n\t//\n\n\tfunction get( attribute ) {\n\n\t\tif ( attribute.isInterleavedBufferAttribute ) attribute = attribute.data;\n\n\t\treturn buffers.get( attribute );\n\n\t}\n\n\tfunction remove( attribute ) {\n\n\t\tif ( attribute.isInterleavedBufferAttribute ) attribute = attribute.data;\n\n\t\tvar data = buffers.get( attribute );\n\n\t\tif ( data ) {\n\n\t\t\tgl.deleteBuffer( data.buffer );\n\n\t\t\tbuffers.delete( attribute );\n\n\t\t}\n\n\t}\n\n\tfunction update( attribute, bufferType ) {\n\n\t\tif ( attribute.isInterleavedBufferAttribute ) attribute = attribute.data;\n\n\t\tvar data = buffers.get( attribute );\n\n\t\tif ( data === undefined ) {\n\n\t\t\tbuffers.set( attribute, createBuffer( attribute, bufferType ) );\n\n\t\t} else if ( data.version < attribute.version ) {\n\n\t\t\tupdateBuffer( data.buffer, attribute, bufferType );\n\n\t\t\tdata.version = attribute.version;\n\n\t\t}\n\n\t}\n\n\treturn {\n\n\t\tget: get,\n\t\tremove: remove,\n\t\tupdate: update\n\n\t};\n\n}\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author Mugen87 / https://github.com/Mugen87\n */\n\n// PlaneGeometry\n\nfunction PlaneGeometry( width, height, widthSegments, heightSegments ) {\n\n\tGeometry.call( this );\n\n\tthis.type = 'PlaneGeometry';\n\n\tthis.parameters = {\n\t\twidth: width,\n\t\theight: height,\n\t\twidthSegments: widthSegments,\n\t\theightSegments: heightSegments\n\t};\n\n\tthis.fromBufferGeometry( new PlaneBufferGeometry( width, height, widthSegments, heightSegments ) );\n\tthis.mergeVertices();\n\n}\n\nPlaneGeometry.prototype = Object.create( Geometry.prototype );\nPlaneGeometry.prototype.constructor = PlaneGeometry;\n\n// PlaneBufferGeometry\n\nfunction PlaneBufferGeometry( width, height, widthSegments, heightSegments ) {\n\n\tBufferGeometry.call( this );\n\n\tthis.type = 'PlaneBufferGeometry';\n\n\tthis.parameters = {\n\t\twidth: width,\n\t\theight: height,\n\t\twidthSegments: widthSegments,\n\t\theightSegments: heightSegments\n\t};\n\n\twidth = width || 1;\n\theight = height || 1;\n\n\tvar width_half = width / 2;\n\tvar height_half = height / 2;\n\n\tvar gridX = Math.floor( widthSegments ) || 1;\n\tvar gridY = Math.floor( heightSegments ) || 1;\n\n\tvar gridX1 = gridX + 1;\n\tvar gridY1 = gridY + 1;\n\n\tvar segment_width = width / gridX;\n\tvar segment_height = height / gridY;\n\n\tvar ix, iy;\n\n\t// buffers\n\n\tvar indices = [];\n\tvar vertices = [];\n\tvar normals = [];\n\tvar uvs = [];\n\n\t// generate vertices, normals and uvs\n\n\tfor ( iy = 0; iy < gridY1; iy ++ ) {\n\n\t\tvar y = iy * segment_height - height_half;\n\n\t\tfor ( ix = 0; ix < gridX1; ix ++ ) {\n\n\t\t\tvar x = ix * segment_width - width_half;\n\n\t\t\tvertices.push( x, - y, 0 );\n\n\t\t\tnormals.push( 0, 0, 1 );\n\n\t\t\tuvs.push( ix / gridX );\n\t\t\tuvs.push( 1 - ( iy / gridY ) );\n\n\t\t}\n\n\t}\n\n\t// indices\n\n\tfor ( iy = 0; iy < gridY; iy ++ ) {\n\n\t\tfor ( ix = 0; ix < gridX; ix ++ ) {\n\n\t\t\tvar a = ix + gridX1 * iy;\n\t\t\tvar b = ix + gridX1 * ( iy + 1 );\n\t\t\tvar c = ( ix + 1 ) + gridX1 * ( iy + 1 );\n\t\t\tvar d = ( ix + 1 ) + gridX1 * iy;\n\n\t\t\t// faces\n\n\t\t\tindices.push( a, b, d );\n\t\t\tindices.push( b, c, d );\n\n\t\t}\n\n\t}\n\n\t// build geometry\n\n\tthis.setIndex( indices );\n\tthis.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\tthis.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );\n\tthis.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );\n\n}\n\nPlaneBufferGeometry.prototype = Object.create( BufferGeometry.prototype );\nPlaneBufferGeometry.prototype.constructor = PlaneBufferGeometry;\n\nvar alphamap_fragment = \"#ifdef USE_ALPHAMAP\\n\\tdiffuseColor.a *= texture2D( alphaMap, vUv ).g;\\n#endif\";\n\nvar alphamap_pars_fragment = \"#ifdef USE_ALPHAMAP\\n\\tuniform sampler2D alphaMap;\\n#endif\";\n\nvar alphatest_fragment = \"#ifdef ALPHATEST\\n\\tif ( diffuseColor.a < ALPHATEST ) discard;\\n#endif\";\n\nvar aomap_fragment = \"#ifdef USE_AOMAP\\n\\tfloat ambientOcclusion = ( texture2D( aoMap, vUv2 ).r - 1.0 ) * aoMapIntensity + 1.0;\\n\\treflectedLight.indirectDiffuse *= ambientOcclusion;\\n\\t#if defined( USE_ENVMAP ) && defined( STANDARD )\\n\\t\\tfloat dotNV = saturate( dot( geometry.normal, geometry.viewDir ) );\\n\\t\\treflectedLight.indirectSpecular *= computeSpecularOcclusion( dotNV, ambientOcclusion, material.specularRoughness );\\n\\t#endif\\n#endif\";\n\nvar aomap_pars_fragment = \"#ifdef USE_AOMAP\\n\\tuniform sampler2D aoMap;\\n\\tuniform float aoMapIntensity;\\n#endif\";\n\nvar begin_vertex = \"vec3 transformed = vec3( position );\";\n\nvar beginnormal_vertex = \"vec3 objectNormal = vec3( normal );\\n#ifdef USE_TANGENT\\n\\tvec3 objectTangent = vec3( tangent.xyz );\\n#endif\";\n\nvar bsdfs = \"vec2 integrateSpecularBRDF( const in float dotNV, const in float roughness ) {\\n\\tconst vec4 c0 = vec4( - 1, - 0.0275, - 0.572, 0.022 );\\n\\tconst vec4 c1 = vec4( 1, 0.0425, 1.04, - 0.04 );\\n\\tvec4 r = roughness * c0 + c1;\\n\\tfloat a004 = min( r.x * r.x, exp2( - 9.28 * dotNV ) ) * r.x + r.y;\\n\\treturn vec2( -1.04, 1.04 ) * a004 + r.zw;\\n}\\nfloat punctualLightIntensityToIrradianceFactor( const in float lightDistance, const in float cutoffDistance, const in float decayExponent ) {\\n#if defined ( PHYSICALLY_CORRECT_LIGHTS )\\n\\tfloat distanceFalloff = 1.0 / max( pow( lightDistance, decayExponent ), 0.01 );\\n\\tif( cutoffDistance > 0.0 ) {\\n\\t\\tdistanceFalloff *= pow2( saturate( 1.0 - pow4( lightDistance / cutoffDistance ) ) );\\n\\t}\\n\\treturn distanceFalloff;\\n#else\\n\\tif( cutoffDistance > 0.0 && decayExponent > 0.0 ) {\\n\\t\\treturn pow( saturate( -lightDistance / cutoffDistance + 1.0 ), decayExponent );\\n\\t}\\n\\treturn 1.0;\\n#endif\\n}\\nvec3 BRDF_Diffuse_Lambert( const in vec3 diffuseColor ) {\\n\\treturn RECIPROCAL_PI * diffuseColor;\\n}\\nvec3 F_Schlick( const in vec3 specularColor, const in float dotLH ) {\\n\\tfloat fresnel = exp2( ( -5.55473 * dotLH - 6.98316 ) * dotLH );\\n\\treturn ( 1.0 - specularColor ) * fresnel + specularColor;\\n}\\nvec3 F_Schlick_RoughnessDependent( const in vec3 F0, const in float dotNV, const in float roughness ) {\\n\\tfloat fresnel = exp2( ( -5.55473 * dotNV - 6.98316 ) * dotNV );\\n\\tvec3 Fr = max( vec3( 1.0 - roughness ), F0 ) - F0;\\n\\treturn Fr * fresnel + F0;\\n}\\nfloat G_GGX_Smith( const in float alpha, const in float dotNL, const in float dotNV ) {\\n\\tfloat a2 = pow2( alpha );\\n\\tfloat gl = dotNL + sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNL ) );\\n\\tfloat gv = dotNV + sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNV ) );\\n\\treturn 1.0 / ( gl * gv );\\n}\\nfloat G_GGX_SmithCorrelated( const in float alpha, const in float dotNL, const in float dotNV ) {\\n\\tfloat a2 = pow2( alpha );\\n\\tfloat gv = dotNL * sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNV ) );\\n\\tfloat gl = dotNV * sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNL ) );\\n\\treturn 0.5 / max( gv + gl, EPSILON );\\n}\\nfloat D_GGX( const in float alpha, const in float dotNH ) {\\n\\tfloat a2 = pow2( alpha );\\n\\tfloat denom = pow2( dotNH ) * ( a2 - 1.0 ) + 1.0;\\n\\treturn RECIPROCAL_PI * a2 / pow2( denom );\\n}\\nvec3 BRDF_Specular_GGX( const in IncidentLight incidentLight, const in vec3 viewDir, const in vec3 normal, const in vec3 specularColor, const in float roughness ) {\\n\\tfloat alpha = pow2( roughness );\\n\\tvec3 halfDir = normalize( incidentLight.direction + viewDir );\\n\\tfloat dotNL = saturate( dot( normal, incidentLight.direction ) );\\n\\tfloat dotNV = saturate( dot( normal, viewDir ) );\\n\\tfloat dotNH = saturate( dot( normal, halfDir ) );\\n\\tfloat dotLH = saturate( dot( incidentLight.direction, halfDir ) );\\n\\tvec3 F = F_Schlick( specularColor, dotLH );\\n\\tfloat G = G_GGX_SmithCorrelated( alpha, dotNL, dotNV );\\n\\tfloat D = D_GGX( alpha, dotNH );\\n\\treturn F * ( G * D );\\n}\\nvec2 LTC_Uv( const in vec3 N, const in vec3 V, const in float roughness ) {\\n\\tconst float LUT_SIZE  = 64.0;\\n\\tconst float LUT_SCALE = ( LUT_SIZE - 1.0 ) / LUT_SIZE;\\n\\tconst float LUT_BIAS  = 0.5 / LUT_SIZE;\\n\\tfloat dotNV = saturate( dot( N, V ) );\\n\\tvec2 uv = vec2( roughness, sqrt( 1.0 - dotNV ) );\\n\\tuv = uv * LUT_SCALE + LUT_BIAS;\\n\\treturn uv;\\n}\\nfloat LTC_ClippedSphereFormFactor( const in vec3 f ) {\\n\\tfloat l = length( f );\\n\\treturn max( ( l * l + f.z ) / ( l + 1.0 ), 0.0 );\\n}\\nvec3 LTC_EdgeVectorFormFactor( const in vec3 v1, const in vec3 v2 ) {\\n\\tfloat x = dot( v1, v2 );\\n\\tfloat y = abs( x );\\n\\tfloat a = 0.8543985 + ( 0.4965155 + 0.0145206 * y ) * y;\\n\\tfloat b = 3.4175940 + ( 4.1616724 + y ) * y;\\n\\tfloat v = a / b;\\n\\tfloat theta_sintheta = ( x > 0.0 ) ? v : 0.5 * inversesqrt( max( 1.0 - x * x, 1e-7 ) ) - v;\\n\\treturn cross( v1, v2 ) * theta_sintheta;\\n}\\nvec3 LTC_Evaluate( const in vec3 N, const in vec3 V, const in vec3 P, const in mat3 mInv, const in vec3 rectCoords[ 4 ] ) {\\n\\tvec3 v1 = rectCoords[ 1 ] - rectCoords[ 0 ];\\n\\tvec3 v2 = rectCoords[ 3 ] - rectCoords[ 0 ];\\n\\tvec3 lightNormal = cross( v1, v2 );\\n\\tif( dot( lightNormal, P - rectCoords[ 0 ] ) < 0.0 ) return vec3( 0.0 );\\n\\tvec3 T1, T2;\\n\\tT1 = normalize( V - N * dot( V, N ) );\\n\\tT2 = - cross( N, T1 );\\n\\tmat3 mat = mInv * transposeMat3( mat3( T1, T2, N ) );\\n\\tvec3 coords[ 4 ];\\n\\tcoords[ 0 ] = mat * ( rectCoords[ 0 ] - P );\\n\\tcoords[ 1 ] = mat * ( rectCoords[ 1 ] - P );\\n\\tcoords[ 2 ] = mat * ( rectCoords[ 2 ] - P );\\n\\tcoords[ 3 ] = mat * ( rectCoords[ 3 ] - P );\\n\\tcoords[ 0 ] = normalize( coords[ 0 ] );\\n\\tcoords[ 1 ] = normalize( coords[ 1 ] );\\n\\tcoords[ 2 ] = normalize( coords[ 2 ] );\\n\\tcoords[ 3 ] = normalize( coords[ 3 ] );\\n\\tvec3 vectorFormFactor = vec3( 0.0 );\\n\\tvectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 0 ], coords[ 1 ] );\\n\\tvectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 1 ], coords[ 2 ] );\\n\\tvectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 2 ], coords[ 3 ] );\\n\\tvectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 3 ], coords[ 0 ] );\\n\\tfloat result = LTC_ClippedSphereFormFactor( vectorFormFactor );\\n\\treturn vec3( result );\\n}\\nvec3 BRDF_Specular_GGX_Environment( const in vec3 viewDir, const in vec3 normal, const in vec3 specularColor, const in float roughness ) {\\n\\tfloat dotNV = saturate( dot( normal, viewDir ) );\\n\\tvec2 brdf = integrateSpecularBRDF( dotNV, roughness );\\n\\treturn specularColor * brdf.x + brdf.y;\\n}\\nvoid BRDF_Specular_Multiscattering_Environment( const in GeometricContext geometry, const in vec3 specularColor, const in float roughness, inout vec3 singleScatter, inout vec3 multiScatter ) {\\n\\tfloat dotNV = saturate( dot( geometry.normal, geometry.viewDir ) );\\n\\tvec3 F = F_Schlick_RoughnessDependent( specularColor, dotNV, roughness );\\n\\tvec2 brdf = integrateSpecularBRDF( dotNV, roughness );\\n\\tvec3 FssEss = F * brdf.x + brdf.y;\\n\\tfloat Ess = brdf.x + brdf.y;\\n\\tfloat Ems = 1.0 - Ess;\\n\\tvec3 Favg = specularColor + ( 1.0 - specularColor ) * 0.047619;\\tvec3 Fms = FssEss * Favg / ( 1.0 - Ems * Favg );\\n\\tsingleScatter += FssEss;\\n\\tmultiScatter += Fms * Ems;\\n}\\nfloat G_BlinnPhong_Implicit( ) {\\n\\treturn 0.25;\\n}\\nfloat D_BlinnPhong( const in float shininess, const in float dotNH ) {\\n\\treturn RECIPROCAL_PI * ( shininess * 0.5 + 1.0 ) * pow( dotNH, shininess );\\n}\\nvec3 BRDF_Specular_BlinnPhong( const in IncidentLight incidentLight, const in GeometricContext geometry, const in vec3 specularColor, const in float shininess ) {\\n\\tvec3 halfDir = normalize( incidentLight.direction + geometry.viewDir );\\n\\tfloat dotNH = saturate( dot( geometry.normal, halfDir ) );\\n\\tfloat dotLH = saturate( dot( incidentLight.direction, halfDir ) );\\n\\tvec3 F = F_Schlick( specularColor, dotLH );\\n\\tfloat G = G_BlinnPhong_Implicit( );\\n\\tfloat D = D_BlinnPhong( shininess, dotNH );\\n\\treturn F * ( G * D );\\n}\\nfloat GGXRoughnessToBlinnExponent( const in float ggxRoughness ) {\\n\\treturn ( 2.0 / pow2( ggxRoughness + 0.0001 ) - 2.0 );\\n}\\nfloat BlinnExponentToGGXRoughness( const in float blinnExponent ) {\\n\\treturn sqrt( 2.0 / ( blinnExponent + 2.0 ) );\\n}\\n#if defined( USE_SHEEN )\\nfloat D_Charlie(float roughness, float NoH) {\\n\\tfloat invAlpha  = 1.0 / roughness;\\n\\tfloat cos2h = NoH * NoH;\\n\\tfloat sin2h = max(1.0 - cos2h, 0.0078125);\\treturn (2.0 + invAlpha) * pow(sin2h, invAlpha * 0.5) / (2.0 * PI);\\n}\\nfloat V_Neubelt(float NoV, float NoL) {\\n\\treturn saturate(1.0 / (4.0 * (NoL + NoV - NoL * NoV)));\\n}\\nvec3 BRDF_Specular_Sheen( const in float roughness, const in vec3 L, const in GeometricContext geometry, vec3 specularColor ) {\\n\\tvec3 N = geometry.normal;\\n\\tvec3 V = geometry.viewDir;\\n\\tvec3 H = normalize( V + L );\\n\\tfloat dotNH = saturate( dot( N, H ) );\\n\\treturn specularColor * D_Charlie( roughness, dotNH ) * V_Neubelt( dot(N, V), dot(N, L) );\\n}\\n#endif\";\n\nvar bumpmap_pars_fragment = \"#ifdef USE_BUMPMAP\\n\\tuniform sampler2D bumpMap;\\n\\tuniform float bumpScale;\\n\\tvec2 dHdxy_fwd() {\\n\\t\\tvec2 dSTdx = dFdx( vUv );\\n\\t\\tvec2 dSTdy = dFdy( vUv );\\n\\t\\tfloat Hll = bumpScale * texture2D( bumpMap, vUv ).x;\\n\\t\\tfloat dBx = bumpScale * texture2D( bumpMap, vUv + dSTdx ).x - Hll;\\n\\t\\tfloat dBy = bumpScale * texture2D( bumpMap, vUv + dSTdy ).x - Hll;\\n\\t\\treturn vec2( dBx, dBy );\\n\\t}\\n\\tvec3 perturbNormalArb( vec3 surf_pos, vec3 surf_norm, vec2 dHdxy ) {\\n\\t\\tvec3 vSigmaX = vec3( dFdx( surf_pos.x ), dFdx( surf_pos.y ), dFdx( surf_pos.z ) );\\n\\t\\tvec3 vSigmaY = vec3( dFdy( surf_pos.x ), dFdy( surf_pos.y ), dFdy( surf_pos.z ) );\\n\\t\\tvec3 vN = surf_norm;\\n\\t\\tvec3 R1 = cross( vSigmaY, vN );\\n\\t\\tvec3 R2 = cross( vN, vSigmaX );\\n\\t\\tfloat fDet = dot( vSigmaX, R1 );\\n\\t\\tfDet *= ( float( gl_FrontFacing ) * 2.0 - 1.0 );\\n\\t\\tvec3 vGrad = sign( fDet ) * ( dHdxy.x * R1 + dHdxy.y * R2 );\\n\\t\\treturn normalize( abs( fDet ) * surf_norm - vGrad );\\n\\t}\\n#endif\";\n\nvar clipping_planes_fragment = \"#if NUM_CLIPPING_PLANES > 0\\n\\tvec4 plane;\\n\\t#pragma unroll_loop\\n\\tfor ( int i = 0; i < UNION_CLIPPING_PLANES; i ++ ) {\\n\\t\\tplane = clippingPlanes[ i ];\\n\\t\\tif ( dot( vViewPosition, plane.xyz ) > plane.w ) discard;\\n\\t}\\n\\t#if UNION_CLIPPING_PLANES < NUM_CLIPPING_PLANES\\n\\t\\tbool clipped = true;\\n\\t\\t#pragma unroll_loop\\n\\t\\tfor ( int i = UNION_CLIPPING_PLANES; i < NUM_CLIPPING_PLANES; i ++ ) {\\n\\t\\t\\tplane = clippingPlanes[ i ];\\n\\t\\t\\tclipped = ( dot( vViewPosition, plane.xyz ) > plane.w ) && clipped;\\n\\t\\t}\\n\\t\\tif ( clipped ) discard;\\n\\t#endif\\n#endif\";\n\nvar clipping_planes_pars_fragment = \"#if NUM_CLIPPING_PLANES > 0\\n\\t#if ! defined( STANDARD ) && ! defined( PHONG ) && ! defined( MATCAP ) && ! defined( TOON )\\n\\t\\tvarying vec3 vViewPosition;\\n\\t#endif\\n\\tuniform vec4 clippingPlanes[ NUM_CLIPPING_PLANES ];\\n#endif\";\n\nvar clipping_planes_pars_vertex = \"#if NUM_CLIPPING_PLANES > 0 && ! defined( STANDARD ) && ! defined( PHONG ) && ! defined( MATCAP ) && ! defined( TOON )\\n\\tvarying vec3 vViewPosition;\\n#endif\";\n\nvar clipping_planes_vertex = \"#if NUM_CLIPPING_PLANES > 0 && ! defined( STANDARD ) && ! defined( PHONG ) && ! defined( MATCAP ) && ! defined( TOON )\\n\\tvViewPosition = - mvPosition.xyz;\\n#endif\";\n\nvar color_fragment = \"#ifdef USE_COLOR\\n\\tdiffuseColor.rgb *= vColor;\\n#endif\";\n\nvar color_pars_fragment = \"#ifdef USE_COLOR\\n\\tvarying vec3 vColor;\\n#endif\";\n\nvar color_pars_vertex = \"#ifdef USE_COLOR\\n\\tvarying vec3 vColor;\\n#endif\";\n\nvar color_vertex = \"#ifdef USE_COLOR\\n\\tvColor.xyz = color.xyz;\\n#endif\";\n\nvar common = \"#define PI 3.14159265359\\n#define PI2 6.28318530718\\n#define PI_HALF 1.5707963267949\\n#define RECIPROCAL_PI 0.31830988618\\n#define RECIPROCAL_PI2 0.15915494\\n#define LOG2 1.442695\\n#define EPSILON 1e-6\\n#ifndef saturate\\n#define saturate(a) clamp( a, 0.0, 1.0 )\\n#endif\\n#define whiteComplement(a) ( 1.0 - saturate( a ) )\\nfloat pow2( const in float x ) { return x*x; }\\nfloat pow3( const in float x ) { return x*x*x; }\\nfloat pow4( const in float x ) { float x2 = x*x; return x2*x2; }\\nfloat average( const in vec3 color ) { return dot( color, vec3( 0.3333 ) ); }\\nhighp float rand( const in vec2 uv ) {\\n\\tconst highp float a = 12.9898, b = 78.233, c = 43758.5453;\\n\\thighp float dt = dot( uv.xy, vec2( a,b ) ), sn = mod( dt, PI );\\n\\treturn fract(sin(sn) * c);\\n}\\n#ifdef HIGH_PRECISION\\n\\tfloat precisionSafeLength( vec3 v ) { return length( v ); }\\n#else\\n\\tfloat max3( vec3 v ) { return max( max( v.x, v.y ), v.z ); }\\n\\tfloat precisionSafeLength( vec3 v ) {\\n\\t\\tfloat maxComponent = max3( abs( v ) );\\n\\t\\treturn length( v / maxComponent ) * maxComponent;\\n\\t}\\n#endif\\nstruct IncidentLight {\\n\\tvec3 color;\\n\\tvec3 direction;\\n\\tbool visible;\\n};\\nstruct ReflectedLight {\\n\\tvec3 directDiffuse;\\n\\tvec3 directSpecular;\\n\\tvec3 indirectDiffuse;\\n\\tvec3 indirectSpecular;\\n};\\nstruct GeometricContext {\\n\\tvec3 position;\\n\\tvec3 normal;\\n\\tvec3 viewDir;\\n#ifdef CLEARCOAT\\n\\tvec3 clearcoatNormal;\\n#endif\\n};\\nvec3 transformDirection( in vec3 dir, in mat4 matrix ) {\\n\\treturn normalize( ( matrix * vec4( dir, 0.0 ) ).xyz );\\n}\\nvec3 inverseTransformDirection( in vec3 dir, in mat4 matrix ) {\\n\\treturn normalize( ( vec4( dir, 0.0 ) * matrix ).xyz );\\n}\\nvec3 projectOnPlane(in vec3 point, in vec3 pointOnPlane, in vec3 planeNormal ) {\\n\\tfloat distance = dot( planeNormal, point - pointOnPlane );\\n\\treturn - distance * planeNormal + point;\\n}\\nfloat sideOfPlane( in vec3 point, in vec3 pointOnPlane, in vec3 planeNormal ) {\\n\\treturn sign( dot( point - pointOnPlane, planeNormal ) );\\n}\\nvec3 linePlaneIntersect( in vec3 pointOnLine, in vec3 lineDirection, in vec3 pointOnPlane, in vec3 planeNormal ) {\\n\\treturn lineDirection * ( dot( planeNormal, pointOnPlane - pointOnLine ) / dot( planeNormal, lineDirection ) ) + pointOnLine;\\n}\\nmat3 transposeMat3( const in mat3 m ) {\\n\\tmat3 tmp;\\n\\ttmp[ 0 ] = vec3( m[ 0 ].x, m[ 1 ].x, m[ 2 ].x );\\n\\ttmp[ 1 ] = vec3( m[ 0 ].y, m[ 1 ].y, m[ 2 ].y );\\n\\ttmp[ 2 ] = vec3( m[ 0 ].z, m[ 1 ].z, m[ 2 ].z );\\n\\treturn tmp;\\n}\\nfloat linearToRelativeLuminance( const in vec3 color ) {\\n\\tvec3 weights = vec3( 0.2126, 0.7152, 0.0722 );\\n\\treturn dot( weights, color.rgb );\\n}\\nbool isPerspectiveMatrix( mat4 m ) {\\n  return m[ 2 ][ 3 ] == - 1.0;\\n}\";\n\nvar cube_uv_reflection_fragment = \"#ifdef ENVMAP_TYPE_CUBE_UV\\n#define cubeUV_maxMipLevel 8.0\\n#define cubeUV_minMipLevel 4.0\\n#define cubeUV_maxTileSize 256.0\\n#define cubeUV_minTileSize 16.0\\nfloat getFace(vec3 direction) {\\n    vec3 absDirection = abs(direction);\\n    float face = -1.0;\\n    if (absDirection.x > absDirection.z) {\\n      if (absDirection.x > absDirection.y)\\n        face = direction.x > 0.0 ? 0.0 : 3.0;\\n      else\\n        face = direction.y > 0.0 ? 1.0 : 4.0;\\n    } else {\\n      if (absDirection.z > absDirection.y)\\n        face = direction.z > 0.0 ? 2.0 : 5.0;\\n      else\\n        face = direction.y > 0.0 ? 1.0 : 4.0;\\n    }\\n    return face;\\n}\\nvec2 getUV(vec3 direction, float face) {\\n    vec2 uv;\\n    if (face == 0.0) {\\n      uv = vec2(-direction.z, direction.y) / abs(direction.x);\\n    } else if (face == 1.0) {\\n      uv = vec2(direction.x, -direction.z) / abs(direction.y);\\n    } else if (face == 2.0) {\\n      uv = direction.xy / abs(direction.z);\\n    } else if (face == 3.0) {\\n      uv = vec2(direction.z, direction.y) / abs(direction.x);\\n    } else if (face == 4.0) {\\n      uv = direction.xz / abs(direction.y);\\n    } else {\\n      uv = vec2(-direction.x, direction.y) / abs(direction.z);\\n    }\\n    return 0.5 * (uv + 1.0);\\n}\\nvec3 bilinearCubeUV(sampler2D envMap, vec3 direction, float mipInt) {\\n  float face = getFace(direction);\\n  float filterInt = max(cubeUV_minMipLevel - mipInt, 0.0);\\n  mipInt = max(mipInt, cubeUV_minMipLevel);\\n  float faceSize = exp2(mipInt);\\n  float texelSize = 1.0 / (3.0 * cubeUV_maxTileSize);\\n  vec2 uv = getUV(direction, face) * (faceSize - 1.0);\\n  vec2 f = fract(uv);\\n  uv += 0.5 - f;\\n  if (face > 2.0) {\\n    uv.y += faceSize;\\n    face -= 3.0;\\n  }\\n  uv.x += face * faceSize;\\n  if(mipInt < cubeUV_maxMipLevel){\\n    uv.y += 2.0 * cubeUV_maxTileSize;\\n  }\\n  uv.y += filterInt * 2.0 * cubeUV_minTileSize;\\n  uv.x += 3.0 * max(0.0, cubeUV_maxTileSize - 2.0 * faceSize);\\n  uv *= texelSize;\\n  vec3 tl = envMapTexelToLinear(texture2D(envMap, uv)).rgb;\\n  uv.x += texelSize;\\n  vec3 tr = envMapTexelToLinear(texture2D(envMap, uv)).rgb;\\n  uv.y += texelSize;\\n  vec3 br = envMapTexelToLinear(texture2D(envMap, uv)).rgb;\\n  uv.x -= texelSize;\\n  vec3 bl = envMapTexelToLinear(texture2D(envMap, uv)).rgb;\\n  vec3 tm = mix(tl, tr, f.x);\\n  vec3 bm = mix(bl, br, f.x);\\n  return mix(tm, bm, f.y);\\n}\\n#define r0 1.0\\n#define v0 0.339\\n#define m0 -2.0\\n#define r1 0.8\\n#define v1 0.276\\n#define m1 -1.0\\n#define r4 0.4\\n#define v4 0.046\\n#define m4 2.0\\n#define r5 0.305\\n#define v5 0.016\\n#define m5 3.0\\n#define r6 0.21\\n#define v6 0.0038\\n#define m6 4.0\\nfloat roughnessToMip(float roughness) {\\n  float mip = 0.0;\\n  if (roughness >= r1) {\\n    mip = (r0 - roughness) * (m1 - m0) / (r0 - r1) + m0;\\n  } else if (roughness >= r4) {\\n    mip = (r1 - roughness) * (m4 - m1) / (r1 - r4) + m1;\\n  } else if (roughness >= r5) {\\n    mip = (r4 - roughness) * (m5 - m4) / (r4 - r5) + m4;\\n  } else if (roughness >= r6) {\\n    mip = (r5 - roughness) * (m6 - m5) / (r5 - r6) + m5;\\n  } else {\\n    mip = -2.0 * log2(1.16 * roughness);  }\\n  return mip;\\n}\\nvec4 textureCubeUV(sampler2D envMap, vec3 sampleDir, float roughness) {\\n  float mip = clamp(roughnessToMip(roughness), m0, cubeUV_maxMipLevel);\\n  float mipF = fract(mip);\\n  float mipInt = floor(mip);\\n  vec3 color0 = bilinearCubeUV(envMap, sampleDir, mipInt);\\n  if (mipF == 0.0) {\\n    return vec4(color0, 1.0);\\n  } else {\\n    vec3 color1 = bilinearCubeUV(envMap, sampleDir, mipInt + 1.0);\\n    return vec4(mix(color0, color1, mipF), 1.0);\\n  }\\n}\\n#endif\";\n\nvar defaultnormal_vertex = \"vec3 transformedNormal = objectNormal;\\n#ifdef USE_INSTANCING\\n\\tmat3 m = mat3( instanceMatrix );\\n\\ttransformedNormal /= vec3( dot( m[ 0 ], m[ 0 ] ), dot( m[ 1 ], m[ 1 ] ), dot( m[ 2 ], m[ 2 ] ) );\\n\\ttransformedNormal = m * transformedNormal;\\n#endif\\ntransformedNormal = normalMatrix * transformedNormal;\\n#ifdef FLIP_SIDED\\n\\ttransformedNormal = - transformedNormal;\\n#endif\\n#ifdef USE_TANGENT\\n\\tvec3 transformedTangent = ( modelViewMatrix * vec4( objectTangent, 0.0 ) ).xyz;\\n\\t#ifdef FLIP_SIDED\\n\\t\\ttransformedTangent = - transformedTangent;\\n\\t#endif\\n#endif\";\n\nvar displacementmap_pars_vertex = \"#ifdef USE_DISPLACEMENTMAP\\n\\tuniform sampler2D displacementMap;\\n\\tuniform float displacementScale;\\n\\tuniform float displacementBias;\\n#endif\";\n\nvar displacementmap_vertex = \"#ifdef USE_DISPLACEMENTMAP\\n\\ttransformed += normalize( objectNormal ) * ( texture2D( displacementMap, vUv ).x * displacementScale + displacementBias );\\n#endif\";\n\nvar emissivemap_fragment = \"#ifdef USE_EMISSIVEMAP\\n\\tvec4 emissiveColor = texture2D( emissiveMap, vUv );\\n\\temissiveColor.rgb = emissiveMapTexelToLinear( emissiveColor ).rgb;\\n\\ttotalEmissiveRadiance *= emissiveColor.rgb;\\n#endif\";\n\nvar emissivemap_pars_fragment = \"#ifdef USE_EMISSIVEMAP\\n\\tuniform sampler2D emissiveMap;\\n#endif\";\n\nvar encodings_fragment = \"gl_FragColor = linearToOutputTexel( gl_FragColor );\";\n\nvar encodings_pars_fragment = \"\\nvec4 LinearToLinear( in vec4 value ) {\\n\\treturn value;\\n}\\nvec4 GammaToLinear( in vec4 value, in float gammaFactor ) {\\n\\treturn vec4( pow( value.rgb, vec3( gammaFactor ) ), value.a );\\n}\\nvec4 LinearToGamma( in vec4 value, in float gammaFactor ) {\\n\\treturn vec4( pow( value.rgb, vec3( 1.0 / gammaFactor ) ), value.a );\\n}\\nvec4 sRGBToLinear( in vec4 value ) {\\n\\treturn vec4( mix( pow( value.rgb * 0.9478672986 + vec3( 0.0521327014 ), vec3( 2.4 ) ), value.rgb * 0.0773993808, vec3( lessThanEqual( value.rgb, vec3( 0.04045 ) ) ) ), value.a );\\n}\\nvec4 LinearTosRGB( in vec4 value ) {\\n\\treturn vec4( mix( pow( value.rgb, vec3( 0.41666 ) ) * 1.055 - vec3( 0.055 ), value.rgb * 12.92, vec3( lessThanEqual( value.rgb, vec3( 0.0031308 ) ) ) ), value.a );\\n}\\nvec4 RGBEToLinear( in vec4 value ) {\\n\\treturn vec4( value.rgb * exp2( value.a * 255.0 - 128.0 ), 1.0 );\\n}\\nvec4 LinearToRGBE( in vec4 value ) {\\n\\tfloat maxComponent = max( max( value.r, value.g ), value.b );\\n\\tfloat fExp = clamp( ceil( log2( maxComponent ) ), -128.0, 127.0 );\\n\\treturn vec4( value.rgb / exp2( fExp ), ( fExp + 128.0 ) / 255.0 );\\n}\\nvec4 RGBMToLinear( in vec4 value, in float maxRange ) {\\n\\treturn vec4( value.rgb * value.a * maxRange, 1.0 );\\n}\\nvec4 LinearToRGBM( in vec4 value, in float maxRange ) {\\n\\tfloat maxRGB = max( value.r, max( value.g, value.b ) );\\n\\tfloat M = clamp( maxRGB / maxRange, 0.0, 1.0 );\\n\\tM = ceil( M * 255.0 ) / 255.0;\\n\\treturn vec4( value.rgb / ( M * maxRange ), M );\\n}\\nvec4 RGBDToLinear( in vec4 value, in float maxRange ) {\\n\\treturn vec4( value.rgb * ( ( maxRange / 255.0 ) / value.a ), 1.0 );\\n}\\nvec4 LinearToRGBD( in vec4 value, in float maxRange ) {\\n\\tfloat maxRGB = max( value.r, max( value.g, value.b ) );\\n\\tfloat D = max( maxRange / maxRGB, 1.0 );\\n\\tD = clamp( floor( D ) / 255.0, 0.0, 1.0 );\\n\\treturn vec4( value.rgb * ( D * ( 255.0 / maxRange ) ), D );\\n}\\nconst mat3 cLogLuvM = mat3( 0.2209, 0.3390, 0.4184, 0.1138, 0.6780, 0.7319, 0.0102, 0.1130, 0.2969 );\\nvec4 LinearToLogLuv( in vec4 value )  {\\n\\tvec3 Xp_Y_XYZp = cLogLuvM * value.rgb;\\n\\tXp_Y_XYZp = max( Xp_Y_XYZp, vec3( 1e-6, 1e-6, 1e-6 ) );\\n\\tvec4 vResult;\\n\\tvResult.xy = Xp_Y_XYZp.xy / Xp_Y_XYZp.z;\\n\\tfloat Le = 2.0 * log2(Xp_Y_XYZp.y) + 127.0;\\n\\tvResult.w = fract( Le );\\n\\tvResult.z = ( Le - ( floor( vResult.w * 255.0 ) ) / 255.0 ) / 255.0;\\n\\treturn vResult;\\n}\\nconst mat3 cLogLuvInverseM = mat3( 6.0014, -2.7008, -1.7996, -1.3320, 3.1029, -5.7721, 0.3008, -1.0882, 5.6268 );\\nvec4 LogLuvToLinear( in vec4 value ) {\\n\\tfloat Le = value.z * 255.0 + value.w;\\n\\tvec3 Xp_Y_XYZp;\\n\\tXp_Y_XYZp.y = exp2( ( Le - 127.0 ) / 2.0 );\\n\\tXp_Y_XYZp.z = Xp_Y_XYZp.y / value.y;\\n\\tXp_Y_XYZp.x = value.x * Xp_Y_XYZp.z;\\n\\tvec3 vRGB = cLogLuvInverseM * Xp_Y_XYZp.rgb;\\n\\treturn vec4( max( vRGB, 0.0 ), 1.0 );\\n}\";\n\nvar envmap_fragment = \"#ifdef USE_ENVMAP\\n\\t#ifdef ENV_WORLDPOS\\n\\t\\tvec3 cameraToFrag;\\n\\t\\t\\n\\t\\tif ( isOrthographic ) {\\n\\t\\t\\tcameraToFrag = normalize( vec3( - viewMatrix[ 0 ][ 2 ], - viewMatrix[ 1 ][ 2 ], - viewMatrix[ 2 ][ 2 ] ) );\\n\\t\\t}  else {\\n\\t\\t\\tcameraToFrag = normalize( vWorldPosition - cameraPosition );\\n\\t\\t}\\n\\t\\tvec3 worldNormal = inverseTransformDirection( normal, viewMatrix );\\n\\t\\t#ifdef ENVMAP_MODE_REFLECTION\\n\\t\\t\\tvec3 reflectVec = reflect( cameraToFrag, worldNormal );\\n\\t\\t#else\\n\\t\\t\\tvec3 reflectVec = refract( cameraToFrag, worldNormal, refractionRatio );\\n\\t\\t#endif\\n\\t#else\\n\\t\\tvec3 reflectVec = vReflect;\\n\\t#endif\\n\\t#ifdef ENVMAP_TYPE_CUBE\\n\\t\\tvec4 envColor = textureCube( envMap, vec3( flipEnvMap * reflectVec.x, reflectVec.yz ) );\\n\\t#elif defined( ENVMAP_TYPE_CUBE_UV )\\n\\t\\tvec4 envColor = textureCubeUV( envMap, reflectVec, 0.0 );\\n\\t#elif defined( ENVMAP_TYPE_EQUIREC )\\n\\t\\tvec2 sampleUV;\\n\\t\\treflectVec = normalize( reflectVec );\\n\\t\\tsampleUV.y = asin( clamp( reflectVec.y, - 1.0, 1.0 ) ) * RECIPROCAL_PI + 0.5;\\n\\t\\tsampleUV.x = atan( reflectVec.z, reflectVec.x ) * RECIPROCAL_PI2 + 0.5;\\n\\t\\tvec4 envColor = texture2D( envMap, sampleUV );\\n\\t#elif defined( ENVMAP_TYPE_SPHERE )\\n\\t\\treflectVec = normalize( reflectVec );\\n\\t\\tvec3 reflectView = normalize( ( viewMatrix * vec4( reflectVec, 0.0 ) ).xyz + vec3( 0.0, 0.0, 1.0 ) );\\n\\t\\tvec4 envColor = texture2D( envMap, reflectView.xy * 0.5 + 0.5 );\\n\\t#else\\n\\t\\tvec4 envColor = vec4( 0.0 );\\n\\t#endif\\n\\t#ifndef ENVMAP_TYPE_CUBE_UV\\n\\t\\tenvColor = envMapTexelToLinear( envColor );\\n\\t#endif\\n\\t#ifdef ENVMAP_BLENDING_MULTIPLY\\n\\t\\toutgoingLight = mix( outgoingLight, outgoingLight * envColor.xyz, specularStrength * reflectivity );\\n\\t#elif defined( ENVMAP_BLENDING_MIX )\\n\\t\\toutgoingLight = mix( outgoingLight, envColor.xyz, specularStrength * reflectivity );\\n\\t#elif defined( ENVMAP_BLENDING_ADD )\\n\\t\\toutgoingLight += envColor.xyz * specularStrength * reflectivity;\\n\\t#endif\\n#endif\";\n\nvar envmap_common_pars_fragment = \"#ifdef USE_ENVMAP\\n\\tuniform float envMapIntensity;\\n\\tuniform float flipEnvMap;\\n\\tuniform int maxMipLevel;\\n\\t#ifdef ENVMAP_TYPE_CUBE\\n\\t\\tuniform samplerCube envMap;\\n\\t#else\\n\\t\\tuniform sampler2D envMap;\\n\\t#endif\\n\\t\\n#endif\";\n\nvar envmap_pars_fragment = \"#ifdef USE_ENVMAP\\n\\tuniform float reflectivity;\\n\\t#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( PHONG )\\n\\t\\t#define ENV_WORLDPOS\\n\\t#endif\\n\\t#ifdef ENV_WORLDPOS\\n\\t\\tvarying vec3 vWorldPosition;\\n\\t\\tuniform float refractionRatio;\\n\\t#else\\n\\t\\tvarying vec3 vReflect;\\n\\t#endif\\n#endif\";\n\nvar envmap_pars_vertex = \"#ifdef USE_ENVMAP\\n\\t#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) ||defined( PHONG )\\n\\t\\t#define ENV_WORLDPOS\\n\\t#endif\\n\\t#ifdef ENV_WORLDPOS\\n\\t\\t\\n\\t\\tvarying vec3 vWorldPosition;\\n\\t#else\\n\\t\\tvarying vec3 vReflect;\\n\\t\\tuniform float refractionRatio;\\n\\t#endif\\n#endif\";\n\nvar envmap_vertex = \"#ifdef USE_ENVMAP\\n\\t#ifdef ENV_WORLDPOS\\n\\t\\tvWorldPosition = worldPosition.xyz;\\n\\t#else\\n\\t\\tvec3 cameraToVertex;\\n\\t\\tif ( isOrthographic ) { \\n\\t\\t\\tcameraToVertex = normalize( vec3( - viewMatrix[ 0 ][ 2 ], - viewMatrix[ 1 ][ 2 ], - viewMatrix[ 2 ][ 2 ] ) );\\n\\t\\t} else {\\n\\t\\t\\tcameraToVertex = normalize( worldPosition.xyz - cameraPosition );\\n\\t\\t}\\n\\t\\tvec3 worldNormal = inverseTransformDirection( transformedNormal, viewMatrix );\\n\\t\\t#ifdef ENVMAP_MODE_REFLECTION\\n\\t\\t\\tvReflect = reflect( cameraToVertex, worldNormal );\\n\\t\\t#else\\n\\t\\t\\tvReflect = refract( cameraToVertex, worldNormal, refractionRatio );\\n\\t\\t#endif\\n\\t#endif\\n#endif\";\n\nvar fog_vertex = \"#ifdef USE_FOG\\n\\tfogDepth = -mvPosition.z;\\n#endif\";\n\nvar fog_pars_vertex = \"#ifdef USE_FOG\\n\\tvarying float fogDepth;\\n#endif\";\n\nvar fog_fragment = \"#ifdef USE_FOG\\n\\t#ifdef FOG_EXP2\\n\\t\\tfloat fogFactor = 1.0 - exp( - fogDensity * fogDensity * fogDepth * fogDepth );\\n\\t#else\\n\\t\\tfloat fogFactor = smoothstep( fogNear, fogFar, fogDepth );\\n\\t#endif\\n\\tgl_FragColor.rgb = mix( gl_FragColor.rgb, fogColor, fogFactor );\\n#endif\";\n\nvar fog_pars_fragment = \"#ifdef USE_FOG\\n\\tuniform vec3 fogColor;\\n\\tvarying float fogDepth;\\n\\t#ifdef FOG_EXP2\\n\\t\\tuniform float fogDensity;\\n\\t#else\\n\\t\\tuniform float fogNear;\\n\\t\\tuniform float fogFar;\\n\\t#endif\\n#endif\";\n\nvar gradientmap_pars_fragment = \"#ifdef USE_GRADIENTMAP\\n\\tuniform sampler2D gradientMap;\\n#endif\\nvec3 getGradientIrradiance( vec3 normal, vec3 lightDirection ) {\\n\\tfloat dotNL = dot( normal, lightDirection );\\n\\tvec2 coord = vec2( dotNL * 0.5 + 0.5, 0.0 );\\n\\t#ifdef USE_GRADIENTMAP\\n\\t\\treturn texture2D( gradientMap, coord ).rgb;\\n\\t#else\\n\\t\\treturn ( coord.x < 0.7 ) ? vec3( 0.7 ) : vec3( 1.0 );\\n\\t#endif\\n}\";\n\nvar lightmap_fragment = \"#ifdef USE_LIGHTMAP\\n\\tvec4 lightMapTexel= texture2D( lightMap, vUv2 );\\n\\treflectedLight.indirectDiffuse += PI * lightMapTexelToLinear( lightMapTexel ).rgb * lightMapIntensity;\\n#endif\";\n\nvar lightmap_pars_fragment = \"#ifdef USE_LIGHTMAP\\n\\tuniform sampler2D lightMap;\\n\\tuniform float lightMapIntensity;\\n#endif\";\n\nvar lights_lambert_vertex = \"vec3 diffuse = vec3( 1.0 );\\nGeometricContext geometry;\\ngeometry.position = mvPosition.xyz;\\ngeometry.normal = normalize( transformedNormal );\\ngeometry.viewDir = ( isOrthographic ) ? vec3( 0, 0, 1 ) : normalize( -mvPosition.xyz );\\nGeometricContext backGeometry;\\nbackGeometry.position = geometry.position;\\nbackGeometry.normal = -geometry.normal;\\nbackGeometry.viewDir = geometry.viewDir;\\nvLightFront = vec3( 0.0 );\\nvIndirectFront = vec3( 0.0 );\\n#ifdef DOUBLE_SIDED\\n\\tvLightBack = vec3( 0.0 );\\n\\tvIndirectBack = vec3( 0.0 );\\n#endif\\nIncidentLight directLight;\\nfloat dotNL;\\nvec3 directLightColor_Diffuse;\\n#if NUM_POINT_LIGHTS > 0\\n\\t#pragma unroll_loop\\n\\tfor ( int i = 0; i < NUM_POINT_LIGHTS; i ++ ) {\\n\\t\\tgetPointDirectLightIrradiance( pointLights[ i ], geometry, directLight );\\n\\t\\tdotNL = dot( geometry.normal, directLight.direction );\\n\\t\\tdirectLightColor_Diffuse = PI * directLight.color;\\n\\t\\tvLightFront += saturate( dotNL ) * directLightColor_Diffuse;\\n\\t\\t#ifdef DOUBLE_SIDED\\n\\t\\t\\tvLightBack += saturate( -dotNL ) * directLightColor_Diffuse;\\n\\t\\t#endif\\n\\t}\\n#endif\\n#if NUM_SPOT_LIGHTS > 0\\n\\t#pragma unroll_loop\\n\\tfor ( int i = 0; i < NUM_SPOT_LIGHTS; i ++ ) {\\n\\t\\tgetSpotDirectLightIrradiance( spotLights[ i ], geometry, directLight );\\n\\t\\tdotNL = dot( geometry.normal, directLight.direction );\\n\\t\\tdirectLightColor_Diffuse = PI * directLight.color;\\n\\t\\tvLightFront += saturate( dotNL ) * directLightColor_Diffuse;\\n\\t\\t#ifdef DOUBLE_SIDED\\n\\t\\t\\tvLightBack += saturate( -dotNL ) * directLightColor_Diffuse;\\n\\t\\t#endif\\n\\t}\\n#endif\\n#if NUM_DIR_LIGHTS > 0\\n\\t#pragma unroll_loop\\n\\tfor ( int i = 0; i < NUM_DIR_LIGHTS; i ++ ) {\\n\\t\\tgetDirectionalDirectLightIrradiance( directionalLights[ i ], geometry, directLight );\\n\\t\\tdotNL = dot( geometry.normal, directLight.direction );\\n\\t\\tdirectLightColor_Diffuse = PI * directLight.color;\\n\\t\\tvLightFront += saturate( dotNL ) * directLightColor_Diffuse;\\n\\t\\t#ifdef DOUBLE_SIDED\\n\\t\\t\\tvLightBack += saturate( -dotNL ) * directLightColor_Diffuse;\\n\\t\\t#endif\\n\\t}\\n#endif\\n#if NUM_HEMI_LIGHTS > 0\\n\\t#pragma unroll_loop\\n\\tfor ( int i = 0; i < NUM_HEMI_LIGHTS; i ++ ) {\\n\\t\\tvIndirectFront += getHemisphereLightIrradiance( hemisphereLights[ i ], geometry );\\n\\t\\t#ifdef DOUBLE_SIDED\\n\\t\\t\\tvIndirectBack += getHemisphereLightIrradiance( hemisphereLights[ i ], backGeometry );\\n\\t\\t#endif\\n\\t}\\n#endif\";\n\nvar lights_pars_begin = \"uniform bool receiveShadow;\\nuniform vec3 ambientLightColor;\\nuniform vec3 lightProbe[ 9 ];\\nvec3 shGetIrradianceAt( in vec3 normal, in vec3 shCoefficients[ 9 ] ) {\\n\\tfloat x = normal.x, y = normal.y, z = normal.z;\\n\\tvec3 result = shCoefficients[ 0 ] * 0.886227;\\n\\tresult += shCoefficients[ 1 ] * 2.0 * 0.511664 * y;\\n\\tresult += shCoefficients[ 2 ] * 2.0 * 0.511664 * z;\\n\\tresult += shCoefficients[ 3 ] * 2.0 * 0.511664 * x;\\n\\tresult += shCoefficients[ 4 ] * 2.0 * 0.429043 * x * y;\\n\\tresult += shCoefficients[ 5 ] * 2.0 * 0.429043 * y * z;\\n\\tresult += shCoefficients[ 6 ] * ( 0.743125 * z * z - 0.247708 );\\n\\tresult += shCoefficients[ 7 ] * 2.0 * 0.429043 * x * z;\\n\\tresult += shCoefficients[ 8 ] * 0.429043 * ( x * x - y * y );\\n\\treturn result;\\n}\\nvec3 getLightProbeIrradiance( const in vec3 lightProbe[ 9 ], const in GeometricContext geometry ) {\\n\\tvec3 worldNormal = inverseTransformDirection( geometry.normal, viewMatrix );\\n\\tvec3 irradiance = shGetIrradianceAt( worldNormal, lightProbe );\\n\\treturn irradiance;\\n}\\nvec3 getAmbientLightIrradiance( const in vec3 ambientLightColor ) {\\n\\tvec3 irradiance = ambientLightColor;\\n\\t#ifndef PHYSICALLY_CORRECT_LIGHTS\\n\\t\\tirradiance *= PI;\\n\\t#endif\\n\\treturn irradiance;\\n}\\n#if NUM_DIR_LIGHTS > 0\\n\\tstruct DirectionalLight {\\n\\t\\tvec3 direction;\\n\\t\\tvec3 color;\\n\\t};\\n\\tuniform DirectionalLight directionalLights[ NUM_DIR_LIGHTS ];\\n\\t#if defined( USE_SHADOWMAP ) && NUM_DIR_LIGHT_SHADOWS > 0\\n\\t\\tstruct DirectionalLightShadow {\\n\\t\\t\\tfloat shadowBias;\\n\\t\\t\\tfloat shadowRadius;\\n\\t\\t\\tvec2 shadowMapSize;\\n\\t\\t};\\n\\t\\tuniform DirectionalLightShadow directionalLightShadows[ NUM_DIR_LIGHT_SHADOWS ];\\n\\t#endif\\n\\tvoid getDirectionalDirectLightIrradiance( const in DirectionalLight directionalLight, const in GeometricContext geometry, out IncidentLight directLight ) {\\n\\t\\tdirectLight.color = directionalLight.color;\\n\\t\\tdirectLight.direction = directionalLight.direction;\\n\\t\\tdirectLight.visible = true;\\n\\t}\\n#endif\\n#if NUM_POINT_LIGHTS > 0\\n\\tstruct PointLight {\\n\\t\\tvec3 position;\\n\\t\\tvec3 color;\\n\\t\\tfloat distance;\\n\\t\\tfloat decay;\\n\\t};\\n\\tuniform PointLight pointLights[ NUM_POINT_LIGHTS ];\\n\\t#if defined( USE_SHADOWMAP ) && NUM_POINT_LIGHT_SHADOWS > 0\\n\\t\\tstruct PointLightShadow {\\n\\t\\t\\tfloat shadowBias;\\n\\t\\t\\tfloat shadowRadius;\\n\\t\\t\\tvec2 shadowMapSize;\\n\\t\\t\\tfloat shadowCameraNear;\\n\\t\\t\\tfloat shadowCameraFar;\\n\\t\\t};\\n\\t\\tuniform PointLightShadow pointLightShadows[ NUM_POINT_LIGHT_SHADOWS ];\\n\\t#endif\\n\\tvoid getPointDirectLightIrradiance( const in PointLight pointLight, const in GeometricContext geometry, out IncidentLight directLight ) {\\n\\t\\tvec3 lVector = pointLight.position - geometry.position;\\n\\t\\tdirectLight.direction = normalize( lVector );\\n\\t\\tfloat lightDistance = length( lVector );\\n\\t\\tdirectLight.color = pointLight.color;\\n\\t\\tdirectLight.color *= punctualLightIntensityToIrradianceFactor( lightDistance, pointLight.distance, pointLight.decay );\\n\\t\\tdirectLight.visible = ( directLight.color != vec3( 0.0 ) );\\n\\t}\\n#endif\\n#if NUM_SPOT_LIGHTS > 0\\n\\tstruct SpotLight {\\n\\t\\tvec3 position;\\n\\t\\tvec3 direction;\\n\\t\\tvec3 color;\\n\\t\\tfloat distance;\\n\\t\\tfloat decay;\\n\\t\\tfloat coneCos;\\n\\t\\tfloat penumbraCos;\\n\\t};\\n\\tuniform SpotLight spotLights[ NUM_SPOT_LIGHTS ];\\n\\t#if defined( USE_SHADOWMAP ) && NUM_SPOT_LIGHT_SHADOWS > 0\\n\\t\\tstruct SpotLightShadow {\\n\\t\\t\\tfloat shadowBias;\\n\\t\\t\\tfloat shadowRadius;\\n\\t\\t\\tvec2 shadowMapSize;\\n\\t\\t};\\n\\t\\tuniform SpotLightShadow spotLightShadows[ NUM_SPOT_LIGHT_SHADOWS ];\\n\\t#endif\\n\\tvoid getSpotDirectLightIrradiance( const in SpotLight spotLight, const in GeometricContext geometry, out IncidentLight directLight  ) {\\n\\t\\tvec3 lVector = spotLight.position - geometry.position;\\n\\t\\tdirectLight.direction = normalize( lVector );\\n\\t\\tfloat lightDistance = length( lVector );\\n\\t\\tfloat angleCos = dot( directLight.direction, spotLight.direction );\\n\\t\\tif ( angleCos > spotLight.coneCos ) {\\n\\t\\t\\tfloat spotEffect = smoothstep( spotLight.coneCos, spotLight.penumbraCos, angleCos );\\n\\t\\t\\tdirectLight.color = spotLight.color;\\n\\t\\t\\tdirectLight.color *= spotEffect * punctualLightIntensityToIrradianceFactor( lightDistance, spotLight.distance, spotLight.decay );\\n\\t\\t\\tdirectLight.visible = true;\\n\\t\\t} else {\\n\\t\\t\\tdirectLight.color = vec3( 0.0 );\\n\\t\\t\\tdirectLight.visible = false;\\n\\t\\t}\\n\\t}\\n#endif\\n#if NUM_RECT_AREA_LIGHTS > 0\\n\\tstruct RectAreaLight {\\n\\t\\tvec3 color;\\n\\t\\tvec3 position;\\n\\t\\tvec3 halfWidth;\\n\\t\\tvec3 halfHeight;\\n\\t};\\n\\tuniform sampler2D ltc_1;\\tuniform sampler2D ltc_2;\\n\\tuniform RectAreaLight rectAreaLights[ NUM_RECT_AREA_LIGHTS ];\\n#endif\\n#if NUM_HEMI_LIGHTS > 0\\n\\tstruct HemisphereLight {\\n\\t\\tvec3 direction;\\n\\t\\tvec3 skyColor;\\n\\t\\tvec3 groundColor;\\n\\t};\\n\\tuniform HemisphereLight hemisphereLights[ NUM_HEMI_LIGHTS ];\\n\\tvec3 getHemisphereLightIrradiance( const in HemisphereLight hemiLight, const in GeometricContext geometry ) {\\n\\t\\tfloat dotNL = dot( geometry.normal, hemiLight.direction );\\n\\t\\tfloat hemiDiffuseWeight = 0.5 * dotNL + 0.5;\\n\\t\\tvec3 irradiance = mix( hemiLight.groundColor, hemiLight.skyColor, hemiDiffuseWeight );\\n\\t\\t#ifndef PHYSICALLY_CORRECT_LIGHTS\\n\\t\\t\\tirradiance *= PI;\\n\\t\\t#endif\\n\\t\\treturn irradiance;\\n\\t}\\n#endif\";\n\nvar envmap_physical_pars_fragment = \"#if defined( USE_ENVMAP )\\n\\t#ifdef ENVMAP_MODE_REFRACTION\\n\\t\\tuniform float refractionRatio;\\n\\t#endif\\n\\tvec3 getLightProbeIndirectIrradiance( const in GeometricContext geometry, const in int maxMIPLevel ) {\\n\\t\\tvec3 worldNormal = inverseTransformDirection( geometry.normal, viewMatrix );\\n\\t\\t#ifdef ENVMAP_TYPE_CUBE\\n\\t\\t\\tvec3 queryVec = vec3( flipEnvMap * worldNormal.x, worldNormal.yz );\\n\\t\\t\\t#ifdef TEXTURE_LOD_EXT\\n\\t\\t\\t\\tvec4 envMapColor = textureCubeLodEXT( envMap, queryVec, float( maxMIPLevel ) );\\n\\t\\t\\t#else\\n\\t\\t\\t\\tvec4 envMapColor = textureCube( envMap, queryVec, float( maxMIPLevel ) );\\n\\t\\t\\t#endif\\n\\t\\t\\tenvMapColor.rgb = envMapTexelToLinear( envMapColor ).rgb;\\n\\t\\t#elif defined( ENVMAP_TYPE_CUBE_UV )\\n\\t\\t\\tvec4 envMapColor = textureCubeUV( envMap, worldNormal, 1.0 );\\n\\t\\t#else\\n\\t\\t\\tvec4 envMapColor = vec4( 0.0 );\\n\\t\\t#endif\\n\\t\\treturn PI * envMapColor.rgb * envMapIntensity;\\n\\t}\\n\\tfloat getSpecularMIPLevel( const in float roughness, const in int maxMIPLevel ) {\\n\\t\\tfloat maxMIPLevelScalar = float( maxMIPLevel );\\n\\t\\tfloat sigma = PI * roughness * roughness / ( 1.0 + roughness );\\n\\t\\tfloat desiredMIPLevel = maxMIPLevelScalar + log2( sigma );\\n\\t\\treturn clamp( desiredMIPLevel, 0.0, maxMIPLevelScalar );\\n\\t}\\n\\tvec3 getLightProbeIndirectRadiance( const in vec3 viewDir, const in vec3 normal, const in float roughness, const in int maxMIPLevel ) {\\n\\t\\t#ifdef ENVMAP_MODE_REFLECTION\\n\\t\\t  vec3 reflectVec = reflect( -viewDir, normal );\\n\\t\\t  reflectVec = normalize( mix( reflectVec, normal, roughness * roughness) );\\n\\t\\t#else\\n\\t\\t  vec3 reflectVec = refract( -viewDir, normal, refractionRatio );\\n\\t\\t#endif\\n\\t\\treflectVec = inverseTransformDirection( reflectVec, viewMatrix );\\n\\t\\tfloat specularMIPLevel = getSpecularMIPLevel( roughness, maxMIPLevel );\\n\\t\\t#ifdef ENVMAP_TYPE_CUBE\\n\\t\\t\\tvec3 queryReflectVec = vec3( flipEnvMap * reflectVec.x, reflectVec.yz );\\n\\t\\t\\t#ifdef TEXTURE_LOD_EXT\\n\\t\\t\\t\\tvec4 envMapColor = textureCubeLodEXT( envMap, queryReflectVec, specularMIPLevel );\\n\\t\\t\\t#else\\n\\t\\t\\t\\tvec4 envMapColor = textureCube( envMap, queryReflectVec, specularMIPLevel );\\n\\t\\t\\t#endif\\n\\t\\t\\tenvMapColor.rgb = envMapTexelToLinear( envMapColor ).rgb;\\n\\t\\t#elif defined( ENVMAP_TYPE_CUBE_UV )\\n\\t\\t\\tvec4 envMapColor = textureCubeUV( envMap, reflectVec, roughness );\\n\\t\\t#elif defined( ENVMAP_TYPE_EQUIREC )\\n\\t\\t\\tvec2 sampleUV;\\n\\t\\t\\tsampleUV.y = asin( clamp( reflectVec.y, - 1.0, 1.0 ) ) * RECIPROCAL_PI + 0.5;\\n\\t\\t\\tsampleUV.x = atan( reflectVec.z, reflectVec.x ) * RECIPROCAL_PI2 + 0.5;\\n\\t\\t\\t#ifdef TEXTURE_LOD_EXT\\n\\t\\t\\t\\tvec4 envMapColor = texture2DLodEXT( envMap, sampleUV, specularMIPLevel );\\n\\t\\t\\t#else\\n\\t\\t\\t\\tvec4 envMapColor = texture2D( envMap, sampleUV, specularMIPLevel );\\n\\t\\t\\t#endif\\n\\t\\t\\tenvMapColor.rgb = envMapTexelToLinear( envMapColor ).rgb;\\n\\t\\t#elif defined( ENVMAP_TYPE_SPHERE )\\n\\t\\t\\tvec3 reflectView = normalize( ( viewMatrix * vec4( reflectVec, 0.0 ) ).xyz + vec3( 0.0,0.0,1.0 ) );\\n\\t\\t\\t#ifdef TEXTURE_LOD_EXT\\n\\t\\t\\t\\tvec4 envMapColor = texture2DLodEXT( envMap, reflectView.xy * 0.5 + 0.5, specularMIPLevel );\\n\\t\\t\\t#else\\n\\t\\t\\t\\tvec4 envMapColor = texture2D( envMap, reflectView.xy * 0.5 + 0.5, specularMIPLevel );\\n\\t\\t\\t#endif\\n\\t\\t\\tenvMapColor.rgb = envMapTexelToLinear( envMapColor ).rgb;\\n\\t\\t#endif\\n\\t\\treturn envMapColor.rgb * envMapIntensity;\\n\\t}\\n#endif\";\n\nvar lights_toon_fragment = \"ToonMaterial material;\\nmaterial.diffuseColor = diffuseColor.rgb;\\nmaterial.specularColor = specular;\\nmaterial.specularShininess = shininess;\\nmaterial.specularStrength = specularStrength;\";\n\nvar lights_toon_pars_fragment = \"varying vec3 vViewPosition;\\n#ifndef FLAT_SHADED\\n\\tvarying vec3 vNormal;\\n#endif\\nstruct ToonMaterial {\\n\\tvec3\\tdiffuseColor;\\n\\tvec3\\tspecularColor;\\n\\tfloat\\tspecularShininess;\\n\\tfloat\\tspecularStrength;\\n};\\nvoid RE_Direct_Toon( const in IncidentLight directLight, const in GeometricContext geometry, const in ToonMaterial material, inout ReflectedLight reflectedLight ) {\\n\\tvec3 irradiance = getGradientIrradiance( geometry.normal, directLight.direction ) * directLight.color;\\n\\t#ifndef PHYSICALLY_CORRECT_LIGHTS\\n\\t\\tirradiance *= PI;\\n\\t#endif\\n\\treflectedLight.directDiffuse += irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\\n\\treflectedLight.directSpecular += irradiance * BRDF_Specular_BlinnPhong( directLight, geometry, material.specularColor, material.specularShininess ) * material.specularStrength;\\n}\\nvoid RE_IndirectDiffuse_Toon( const in vec3 irradiance, const in GeometricContext geometry, const in ToonMaterial material, inout ReflectedLight reflectedLight ) {\\n\\treflectedLight.indirectDiffuse += irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\\n}\\n#define RE_Direct\\t\\t\\t\\tRE_Direct_Toon\\n#define RE_IndirectDiffuse\\t\\tRE_IndirectDiffuse_Toon\\n#define Material_LightProbeLOD( material )\\t(0)\";\n\nvar lights_phong_fragment = \"BlinnPhongMaterial material;\\nmaterial.diffuseColor = diffuseColor.rgb;\\nmaterial.specularColor = specular;\\nmaterial.specularShininess = shininess;\\nmaterial.specularStrength = specularStrength;\";\n\nvar lights_phong_pars_fragment = \"varying vec3 vViewPosition;\\n#ifndef FLAT_SHADED\\n\\tvarying vec3 vNormal;\\n#endif\\nstruct BlinnPhongMaterial {\\n\\tvec3\\tdiffuseColor;\\n\\tvec3\\tspecularColor;\\n\\tfloat\\tspecularShininess;\\n\\tfloat\\tspecularStrength;\\n};\\nvoid RE_Direct_BlinnPhong( const in IncidentLight directLight, const in GeometricContext geometry, const in BlinnPhongMaterial material, inout ReflectedLight reflectedLight ) {\\n\\tfloat dotNL = saturate( dot( geometry.normal, directLight.direction ) );\\n\\tvec3 irradiance = dotNL * directLight.color;\\n\\t#ifndef PHYSICALLY_CORRECT_LIGHTS\\n\\t\\tirradiance *= PI;\\n\\t#endif\\n\\treflectedLight.directDiffuse += irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\\n\\treflectedLight.directSpecular += irradiance * BRDF_Specular_BlinnPhong( directLight, geometry, material.specularColor, material.specularShininess ) * material.specularStrength;\\n}\\nvoid RE_IndirectDiffuse_BlinnPhong( const in vec3 irradiance, const in GeometricContext geometry, const in BlinnPhongMaterial material, inout ReflectedLight reflectedLight ) {\\n\\treflectedLight.indirectDiffuse += irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\\n}\\n#define RE_Direct\\t\\t\\t\\tRE_Direct_BlinnPhong\\n#define RE_IndirectDiffuse\\t\\tRE_IndirectDiffuse_BlinnPhong\\n#define Material_LightProbeLOD( material )\\t(0)\";\n\nvar lights_physical_fragment = \"PhysicalMaterial material;\\nmaterial.diffuseColor = diffuseColor.rgb * ( 1.0 - metalnessFactor );\\nvec3 dxy = max( abs( dFdx( geometryNormal ) ), abs( dFdy( geometryNormal ) ) );\\nfloat geometryRoughness = max( max( dxy.x, dxy.y ), dxy.z );\\nmaterial.specularRoughness = max( roughnessFactor, 0.0525 );material.specularRoughness += geometryRoughness;\\nmaterial.specularRoughness = min( material.specularRoughness, 1.0 );\\n#ifdef REFLECTIVITY\\n\\tmaterial.specularColor = mix( vec3( MAXIMUM_SPECULAR_COEFFICIENT * pow2( reflectivity ) ), diffuseColor.rgb, metalnessFactor );\\n#else\\n\\tmaterial.specularColor = mix( vec3( DEFAULT_SPECULAR_COEFFICIENT ), diffuseColor.rgb, metalnessFactor );\\n#endif\\n#ifdef CLEARCOAT\\n\\tmaterial.clearcoat = saturate( clearcoat );\\tmaterial.clearcoatRoughness = max( clearcoatRoughness, 0.0525 );\\n\\tmaterial.clearcoatRoughness += geometryRoughness;\\n\\tmaterial.clearcoatRoughness = min( material.clearcoatRoughness, 1.0 );\\n#endif\\n#ifdef USE_SHEEN\\n\\tmaterial.sheenColor = sheen;\\n#endif\";\n\nvar lights_physical_pars_fragment = \"struct PhysicalMaterial {\\n\\tvec3\\tdiffuseColor;\\n\\tfloat\\tspecularRoughness;\\n\\tvec3\\tspecularColor;\\n#ifdef CLEARCOAT\\n\\tfloat clearcoat;\\n\\tfloat clearcoatRoughness;\\n#endif\\n#ifdef USE_SHEEN\\n\\tvec3 sheenColor;\\n#endif\\n};\\n#define MAXIMUM_SPECULAR_COEFFICIENT 0.16\\n#define DEFAULT_SPECULAR_COEFFICIENT 0.04\\nfloat clearcoatDHRApprox( const in float roughness, const in float dotNL ) {\\n\\treturn DEFAULT_SPECULAR_COEFFICIENT + ( 1.0 - DEFAULT_SPECULAR_COEFFICIENT ) * ( pow( 1.0 - dotNL, 5.0 ) * pow( 1.0 - roughness, 2.0 ) );\\n}\\n#if NUM_RECT_AREA_LIGHTS > 0\\n\\tvoid RE_Direct_RectArea_Physical( const in RectAreaLight rectAreaLight, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {\\n\\t\\tvec3 normal = geometry.normal;\\n\\t\\tvec3 viewDir = geometry.viewDir;\\n\\t\\tvec3 position = geometry.position;\\n\\t\\tvec3 lightPos = rectAreaLight.position;\\n\\t\\tvec3 halfWidth = rectAreaLight.halfWidth;\\n\\t\\tvec3 halfHeight = rectAreaLight.halfHeight;\\n\\t\\tvec3 lightColor = rectAreaLight.color;\\n\\t\\tfloat roughness = material.specularRoughness;\\n\\t\\tvec3 rectCoords[ 4 ];\\n\\t\\trectCoords[ 0 ] = lightPos + halfWidth - halfHeight;\\t\\trectCoords[ 1 ] = lightPos - halfWidth - halfHeight;\\n\\t\\trectCoords[ 2 ] = lightPos - halfWidth + halfHeight;\\n\\t\\trectCoords[ 3 ] = lightPos + halfWidth + halfHeight;\\n\\t\\tvec2 uv = LTC_Uv( normal, viewDir, roughness );\\n\\t\\tvec4 t1 = texture2D( ltc_1, uv );\\n\\t\\tvec4 t2 = texture2D( ltc_2, uv );\\n\\t\\tmat3 mInv = mat3(\\n\\t\\t\\tvec3( t1.x, 0, t1.y ),\\n\\t\\t\\tvec3(    0, 1,    0 ),\\n\\t\\t\\tvec3( t1.z, 0, t1.w )\\n\\t\\t);\\n\\t\\tvec3 fresnel = ( material.specularColor * t2.x + ( vec3( 1.0 ) - material.specularColor ) * t2.y );\\n\\t\\treflectedLight.directSpecular += lightColor * fresnel * LTC_Evaluate( normal, viewDir, position, mInv, rectCoords );\\n\\t\\treflectedLight.directDiffuse += lightColor * material.diffuseColor * LTC_Evaluate( normal, viewDir, position, mat3( 1.0 ), rectCoords );\\n\\t}\\n#endif\\nvoid RE_Direct_Physical( const in IncidentLight directLight, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {\\n\\tfloat dotNL = saturate( dot( geometry.normal, directLight.direction ) );\\n\\tvec3 irradiance = dotNL * directLight.color;\\n\\t#ifndef PHYSICALLY_CORRECT_LIGHTS\\n\\t\\tirradiance *= PI;\\n\\t#endif\\n\\t#ifdef CLEARCOAT\\n\\t\\tfloat ccDotNL = saturate( dot( geometry.clearcoatNormal, directLight.direction ) );\\n\\t\\tvec3 ccIrradiance = ccDotNL * directLight.color;\\n\\t\\t#ifndef PHYSICALLY_CORRECT_LIGHTS\\n\\t\\t\\tccIrradiance *= PI;\\n\\t\\t#endif\\n\\t\\tfloat clearcoatDHR = material.clearcoat * clearcoatDHRApprox( material.clearcoatRoughness, ccDotNL );\\n\\t\\treflectedLight.directSpecular += ccIrradiance * material.clearcoat * BRDF_Specular_GGX( directLight, geometry.viewDir, geometry.clearcoatNormal, vec3( DEFAULT_SPECULAR_COEFFICIENT ), material.clearcoatRoughness );\\n\\t#else\\n\\t\\tfloat clearcoatDHR = 0.0;\\n\\t#endif\\n\\t#ifdef USE_SHEEN\\n\\t\\treflectedLight.directSpecular += ( 1.0 - clearcoatDHR ) * irradiance * BRDF_Specular_Sheen(\\n\\t\\t\\tmaterial.specularRoughness,\\n\\t\\t\\tdirectLight.direction,\\n\\t\\t\\tgeometry,\\n\\t\\t\\tmaterial.sheenColor\\n\\t\\t);\\n\\t#else\\n\\t\\treflectedLight.directSpecular += ( 1.0 - clearcoatDHR ) * irradiance * BRDF_Specular_GGX( directLight, geometry.viewDir, geometry.normal, material.specularColor, material.specularRoughness);\\n\\t#endif\\n\\treflectedLight.directDiffuse += ( 1.0 - clearcoatDHR ) * irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\\n}\\nvoid RE_IndirectDiffuse_Physical( const in vec3 irradiance, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {\\n\\treflectedLight.indirectDiffuse += irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );\\n}\\nvoid RE_IndirectSpecular_Physical( const in vec3 radiance, const in vec3 irradiance, const in vec3 clearcoatRadiance, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight) {\\n\\t#ifdef CLEARCOAT\\n\\t\\tfloat ccDotNV = saturate( dot( geometry.clearcoatNormal, geometry.viewDir ) );\\n\\t\\treflectedLight.indirectSpecular += clearcoatRadiance * material.clearcoat * BRDF_Specular_GGX_Environment( geometry.viewDir, geometry.clearcoatNormal, vec3( DEFAULT_SPECULAR_COEFFICIENT ), material.clearcoatRoughness );\\n\\t\\tfloat ccDotNL = ccDotNV;\\n\\t\\tfloat clearcoatDHR = material.clearcoat * clearcoatDHRApprox( material.clearcoatRoughness, ccDotNL );\\n\\t#else\\n\\t\\tfloat clearcoatDHR = 0.0;\\n\\t#endif\\n\\tfloat clearcoatInv = 1.0 - clearcoatDHR;\\n\\tvec3 singleScattering = vec3( 0.0 );\\n\\tvec3 multiScattering = vec3( 0.0 );\\n\\tvec3 cosineWeightedIrradiance = irradiance * RECIPROCAL_PI;\\n\\tBRDF_Specular_Multiscattering_Environment( geometry, material.specularColor, material.specularRoughness, singleScattering, multiScattering );\\n\\tvec3 diffuse = material.diffuseColor * ( 1.0 - ( singleScattering + multiScattering ) );\\n\\treflectedLight.indirectSpecular += clearcoatInv * radiance * singleScattering;\\n\\treflectedLight.indirectSpecular += multiScattering * cosineWeightedIrradiance;\\n\\treflectedLight.indirectDiffuse += diffuse * cosineWeightedIrradiance;\\n}\\n#define RE_Direct\\t\\t\\t\\tRE_Direct_Physical\\n#define RE_Direct_RectArea\\t\\tRE_Direct_RectArea_Physical\\n#define RE_IndirectDiffuse\\t\\tRE_IndirectDiffuse_Physical\\n#define RE_IndirectSpecular\\t\\tRE_IndirectSpecular_Physical\\nfloat computeSpecularOcclusion( const in float dotNV, const in float ambientOcclusion, const in float roughness ) {\\n\\treturn saturate( pow( dotNV + ambientOcclusion, exp2( - 16.0 * roughness - 1.0 ) ) - 1.0 + ambientOcclusion );\\n}\";\n\nvar lights_fragment_begin = \"\\nGeometricContext geometry;\\ngeometry.position = - vViewPosition;\\ngeometry.normal = normal;\\ngeometry.viewDir = ( isOrthographic ) ? vec3( 0, 0, 1 ) : normalize( vViewPosition );\\n#ifdef CLEARCOAT\\n\\tgeometry.clearcoatNormal = clearcoatNormal;\\n#endif\\nIncidentLight directLight;\\n#if ( NUM_POINT_LIGHTS > 0 ) && defined( RE_Direct )\\n\\tPointLight pointLight;\\n\\t#if defined( USE_SHADOWMAP ) && NUM_POINT_LIGHT_SHADOWS > 0\\n\\tPointLightShadow pointLightShadow;\\n\\t#endif\\n\\t#pragma unroll_loop\\n\\tfor ( int i = 0; i < NUM_POINT_LIGHTS; i ++ ) {\\n\\t\\tpointLight = pointLights[ i ];\\n\\t\\tgetPointDirectLightIrradiance( pointLight, geometry, directLight );\\n\\t\\t#if defined( USE_SHADOWMAP ) && ( UNROLLED_LOOP_INDEX < NUM_POINT_LIGHT_SHADOWS )\\n\\t\\tpointLightShadow = pointLightShadows[ i ];\\n\\t\\tdirectLight.color *= all( bvec2( directLight.visible, receiveShadow ) ) ? getPointShadow( pointShadowMap[ i ], pointLightShadow.shadowMapSize, pointLightShadow.shadowBias, pointLightShadow.shadowRadius, vPointShadowCoord[ i ], pointLightShadow.shadowCameraNear, pointLightShadow.shadowCameraFar ) : 1.0;\\n\\t\\t#endif\\n\\t\\tRE_Direct( directLight, geometry, material, reflectedLight );\\n\\t}\\n#endif\\n#if ( NUM_SPOT_LIGHTS > 0 ) && defined( RE_Direct )\\n\\tSpotLight spotLight;\\n\\t#if defined( USE_SHADOWMAP ) && NUM_SPOT_LIGHT_SHADOWS > 0\\n\\tSpotLightShadow spotLightShadow;\\n\\t#endif\\n\\t#pragma unroll_loop\\n\\tfor ( int i = 0; i < NUM_SPOT_LIGHTS; i ++ ) {\\n\\t\\tspotLight = spotLights[ i ];\\n\\t\\tgetSpotDirectLightIrradiance( spotLight, geometry, directLight );\\n\\t\\t#if defined( USE_SHADOWMAP ) && ( UNROLLED_LOOP_INDEX < NUM_SPOT_LIGHT_SHADOWS )\\n\\t\\tspotLightShadow = spotLightShadows[ i ];\\n\\t\\tdirectLight.color *= all( bvec2( directLight.visible, receiveShadow ) ) ? getShadow( spotShadowMap[ i ], spotLightShadow.shadowMapSize, spotLightShadow.shadowBias, spotLightShadow.shadowRadius, vSpotShadowCoord[ i ] ) : 1.0;\\n\\t\\t#endif\\n\\t\\tRE_Direct( directLight, geometry, material, reflectedLight );\\n\\t}\\n#endif\\n#if ( NUM_DIR_LIGHTS > 0 ) && defined( RE_Direct )\\n\\tDirectionalLight directionalLight;\\n\\t#if defined( USE_SHADOWMAP ) && NUM_DIR_LIGHT_SHADOWS > 0\\n\\tDirectionalLightShadow directionalLightShadow;\\n\\t#endif\\n\\t#pragma unroll_loop\\n\\tfor ( int i = 0; i < NUM_DIR_LIGHTS; i ++ ) {\\n\\t\\tdirectionalLight = directionalLights[ i ];\\n\\t\\tgetDirectionalDirectLightIrradiance( directionalLight, geometry, directLight );\\n\\t\\t#if defined( USE_SHADOWMAP ) && ( UNROLLED_LOOP_INDEX < NUM_DIR_LIGHT_SHADOWS )\\n\\t\\tdirectionalLightShadow = directionalLightShadows[ i ];\\n\\t\\tdirectLight.color *= all( bvec2( directLight.visible, receiveShadow ) ) ? getShadow( directionalShadowMap[ i ], directionalLightShadow.shadowMapSize, directionalLightShadow.shadowBias, directionalLightShadow.shadowRadius, vDirectionalShadowCoord[ i ] ) : 1.0;\\n\\t\\t#endif\\n\\t\\tRE_Direct( directLight, geometry, material, reflectedLight );\\n\\t}\\n#endif\\n#if ( NUM_RECT_AREA_LIGHTS > 0 ) && defined( RE_Direct_RectArea )\\n\\tRectAreaLight rectAreaLight;\\n\\t#pragma unroll_loop\\n\\tfor ( int i = 0; i < NUM_RECT_AREA_LIGHTS; i ++ ) {\\n\\t\\trectAreaLight = rectAreaLights[ i ];\\n\\t\\tRE_Direct_RectArea( rectAreaLight, geometry, material, reflectedLight );\\n\\t}\\n#endif\\n#if defined( RE_IndirectDiffuse )\\n\\tvec3 iblIrradiance = vec3( 0.0 );\\n\\tvec3 irradiance = getAmbientLightIrradiance( ambientLightColor );\\n\\tirradiance += getLightProbeIrradiance( lightProbe, geometry );\\n\\t#if ( NUM_HEMI_LIGHTS > 0 )\\n\\t\\t#pragma unroll_loop\\n\\t\\tfor ( int i = 0; i < NUM_HEMI_LIGHTS; i ++ ) {\\n\\t\\t\\tirradiance += getHemisphereLightIrradiance( hemisphereLights[ i ], geometry );\\n\\t\\t}\\n\\t#endif\\n#endif\\n#if defined( RE_IndirectSpecular )\\n\\tvec3 radiance = vec3( 0.0 );\\n\\tvec3 clearcoatRadiance = vec3( 0.0 );\\n#endif\";\n\nvar lights_fragment_maps = \"#if defined( RE_IndirectDiffuse )\\n\\t#ifdef USE_LIGHTMAP\\n\\t\\tvec4 lightMapTexel= texture2D( lightMap, vUv2 );\\n\\t\\tvec3 lightMapIrradiance = lightMapTexelToLinear( lightMapTexel ).rgb * lightMapIntensity;\\n\\t\\t#ifndef PHYSICALLY_CORRECT_LIGHTS\\n\\t\\t\\tlightMapIrradiance *= PI;\\n\\t\\t#endif\\n\\t\\tirradiance += lightMapIrradiance;\\n\\t#endif\\n\\t#if defined( USE_ENVMAP ) && defined( STANDARD ) && defined( ENVMAP_TYPE_CUBE_UV )\\n\\t\\tiblIrradiance += getLightProbeIndirectIrradiance( geometry, maxMipLevel );\\n\\t#endif\\n#endif\\n#if defined( USE_ENVMAP ) && defined( RE_IndirectSpecular )\\n\\tradiance += getLightProbeIndirectRadiance( geometry.viewDir, geometry.normal, material.specularRoughness, maxMipLevel );\\n\\t#ifdef CLEARCOAT\\n\\t\\tclearcoatRadiance += getLightProbeIndirectRadiance( geometry.viewDir, geometry.clearcoatNormal, material.clearcoatRoughness, maxMipLevel );\\n\\t#endif\\n#endif\";\n\nvar lights_fragment_end = \"#if defined( RE_IndirectDiffuse )\\n\\tRE_IndirectDiffuse( irradiance, geometry, material, reflectedLight );\\n#endif\\n#if defined( RE_IndirectSpecular )\\n\\tRE_IndirectSpecular( radiance, iblIrradiance, clearcoatRadiance, geometry, material, reflectedLight );\\n#endif\";\n\nvar logdepthbuf_fragment = \"#if defined( USE_LOGDEPTHBUF ) && defined( USE_LOGDEPTHBUF_EXT )\\n\\tgl_FragDepthEXT = vIsPerspective == 0.0 ? gl_FragCoord.z : log2( vFragDepth ) * logDepthBufFC * 0.5;\\n#endif\";\n\nvar logdepthbuf_pars_fragment = \"#if defined( USE_LOGDEPTHBUF ) && defined( USE_LOGDEPTHBUF_EXT )\\n\\tuniform float logDepthBufFC;\\n\\tvarying float vFragDepth;\\n\\tvarying float vIsPerspective;\\n#endif\";\n\nvar logdepthbuf_pars_vertex = \"#ifdef USE_LOGDEPTHBUF\\n\\t#ifdef USE_LOGDEPTHBUF_EXT\\n\\t\\tvarying float vFragDepth;\\n\\t\\tvarying float vIsPerspective;\\n\\t#else\\n\\t\\tuniform float logDepthBufFC;\\n\\t#endif\\n#endif\";\n\nvar logdepthbuf_vertex = \"#ifdef USE_LOGDEPTHBUF\\n\\t#ifdef USE_LOGDEPTHBUF_EXT\\n\\t\\tvFragDepth = 1.0 + gl_Position.w;\\n\\t\\tvIsPerspective = float( isPerspectiveMatrix( projectionMatrix ) );\\n\\t#else\\n\\t\\tif ( isPerspectiveMatrix( projectionMatrix ) ) {\\n\\t\\t\\tgl_Position.z = log2( max( EPSILON, gl_Position.w + 1.0 ) ) * logDepthBufFC - 1.0;\\n\\t\\t\\tgl_Position.z *= gl_Position.w;\\n\\t\\t}\\n\\t#endif\\n#endif\";\n\nvar map_fragment = \"#ifdef USE_MAP\\n\\tvec4 texelColor = texture2D( map, vUv );\\n\\ttexelColor = mapTexelToLinear( texelColor );\\n\\tdiffuseColor *= texelColor;\\n#endif\";\n\nvar map_pars_fragment = \"#ifdef USE_MAP\\n\\tuniform sampler2D map;\\n#endif\";\n\nvar map_particle_fragment = \"#if defined( USE_MAP ) || defined( USE_ALPHAMAP )\\n\\tvec2 uv = ( uvTransform * vec3( gl_PointCoord.x, 1.0 - gl_PointCoord.y, 1 ) ).xy;\\n#endif\\n#ifdef USE_MAP\\n\\tvec4 mapTexel = texture2D( map, uv );\\n\\tdiffuseColor *= mapTexelToLinear( mapTexel );\\n#endif\\n#ifdef USE_ALPHAMAP\\n\\tdiffuseColor.a *= texture2D( alphaMap, uv ).g;\\n#endif\";\n\nvar map_particle_pars_fragment = \"#if defined( USE_MAP ) || defined( USE_ALPHAMAP )\\n\\tuniform mat3 uvTransform;\\n#endif\\n#ifdef USE_MAP\\n\\tuniform sampler2D map;\\n#endif\\n#ifdef USE_ALPHAMAP\\n\\tuniform sampler2D alphaMap;\\n#endif\";\n\nvar metalnessmap_fragment = \"float metalnessFactor = metalness;\\n#ifdef USE_METALNESSMAP\\n\\tvec4 texelMetalness = texture2D( metalnessMap, vUv );\\n\\tmetalnessFactor *= texelMetalness.b;\\n#endif\";\n\nvar metalnessmap_pars_fragment = \"#ifdef USE_METALNESSMAP\\n\\tuniform sampler2D metalnessMap;\\n#endif\";\n\nvar morphnormal_vertex = \"#ifdef USE_MORPHNORMALS\\n\\tobjectNormal *= morphTargetBaseInfluence;\\n\\tobjectNormal += morphNormal0 * morphTargetInfluences[ 0 ];\\n\\tobjectNormal += morphNormal1 * morphTargetInfluences[ 1 ];\\n\\tobjectNormal += morphNormal2 * morphTargetInfluences[ 2 ];\\n\\tobjectNormal += morphNormal3 * morphTargetInfluences[ 3 ];\\n#endif\";\n\nvar morphtarget_pars_vertex = \"#ifdef USE_MORPHTARGETS\\n\\tuniform float morphTargetBaseInfluence;\\n\\t#ifndef USE_MORPHNORMALS\\n\\tuniform float morphTargetInfluences[ 8 ];\\n\\t#else\\n\\tuniform float morphTargetInfluences[ 4 ];\\n\\t#endif\\n#endif\";\n\nvar morphtarget_vertex = \"#ifdef USE_MORPHTARGETS\\n\\ttransformed *= morphTargetBaseInfluence;\\n\\ttransformed += morphTarget0 * morphTargetInfluences[ 0 ];\\n\\ttransformed += morphTarget1 * morphTargetInfluences[ 1 ];\\n\\ttransformed += morphTarget2 * morphTargetInfluences[ 2 ];\\n\\ttransformed += morphTarget3 * morphTargetInfluences[ 3 ];\\n\\t#ifndef USE_MORPHNORMALS\\n\\ttransformed += morphTarget4 * morphTargetInfluences[ 4 ];\\n\\ttransformed += morphTarget5 * morphTargetInfluences[ 5 ];\\n\\ttransformed += morphTarget6 * morphTargetInfluences[ 6 ];\\n\\ttransformed += morphTarget7 * morphTargetInfluences[ 7 ];\\n\\t#endif\\n#endif\";\n\nvar normal_fragment_begin = \"#ifdef FLAT_SHADED\\n\\tvec3 fdx = vec3( dFdx( vViewPosition.x ), dFdx( vViewPosition.y ), dFdx( vViewPosition.z ) );\\n\\tvec3 fdy = vec3( dFdy( vViewPosition.x ), dFdy( vViewPosition.y ), dFdy( vViewPosition.z ) );\\n\\tvec3 normal = normalize( cross( fdx, fdy ) );\\n#else\\n\\tvec3 normal = normalize( vNormal );\\n\\t#ifdef DOUBLE_SIDED\\n\\t\\tnormal = normal * ( float( gl_FrontFacing ) * 2.0 - 1.0 );\\n\\t#endif\\n\\t#ifdef USE_TANGENT\\n\\t\\tvec3 tangent = normalize( vTangent );\\n\\t\\tvec3 bitangent = normalize( vBitangent );\\n\\t\\t#ifdef DOUBLE_SIDED\\n\\t\\t\\ttangent = tangent * ( float( gl_FrontFacing ) * 2.0 - 1.0 );\\n\\t\\t\\tbitangent = bitangent * ( float( gl_FrontFacing ) * 2.0 - 1.0 );\\n\\t\\t#endif\\n\\t\\t#if defined( TANGENTSPACE_NORMALMAP ) || defined( USE_CLEARCOAT_NORMALMAP )\\n\\t\\t\\tmat3 vTBN = mat3( tangent, bitangent, normal );\\n\\t\\t#endif\\n\\t#endif\\n#endif\\nvec3 geometryNormal = normal;\";\n\nvar normal_fragment_maps = \"#ifdef OBJECTSPACE_NORMALMAP\\n\\tnormal = texture2D( normalMap, vUv ).xyz * 2.0 - 1.0;\\n\\t#ifdef FLIP_SIDED\\n\\t\\tnormal = - normal;\\n\\t#endif\\n\\t#ifdef DOUBLE_SIDED\\n\\t\\tnormal = normal * ( float( gl_FrontFacing ) * 2.0 - 1.0 );\\n\\t#endif\\n\\tnormal = normalize( normalMatrix * normal );\\n#elif defined( TANGENTSPACE_NORMALMAP )\\n\\tvec3 mapN = texture2D( normalMap, vUv ).xyz * 2.0 - 1.0;\\n\\tmapN.xy *= normalScale;\\n\\t#ifdef USE_TANGENT\\n\\t\\tnormal = normalize( vTBN * mapN );\\n\\t#else\\n\\t\\tnormal = perturbNormal2Arb( -vViewPosition, normal, mapN );\\n\\t#endif\\n#elif defined( USE_BUMPMAP )\\n\\tnormal = perturbNormalArb( -vViewPosition, normal, dHdxy_fwd() );\\n#endif\";\n\nvar normalmap_pars_fragment = \"#ifdef USE_NORMALMAP\\n\\tuniform sampler2D normalMap;\\n\\tuniform vec2 normalScale;\\n#endif\\n#ifdef OBJECTSPACE_NORMALMAP\\n\\tuniform mat3 normalMatrix;\\n#endif\\n#if ! defined ( USE_TANGENT ) && ( defined ( TANGENTSPACE_NORMALMAP ) || defined ( USE_CLEARCOAT_NORMALMAP ) )\\n\\tvec3 perturbNormal2Arb( vec3 eye_pos, vec3 surf_norm, vec3 mapN ) {\\n\\t\\tvec3 q0 = vec3( dFdx( eye_pos.x ), dFdx( eye_pos.y ), dFdx( eye_pos.z ) );\\n\\t\\tvec3 q1 = vec3( dFdy( eye_pos.x ), dFdy( eye_pos.y ), dFdy( eye_pos.z ) );\\n\\t\\tvec2 st0 = dFdx( vUv.st );\\n\\t\\tvec2 st1 = dFdy( vUv.st );\\n\\t\\tfloat scale = sign( st1.t * st0.s - st0.t * st1.s );\\n\\t\\tvec3 S = normalize( ( q0 * st1.t - q1 * st0.t ) * scale );\\n\\t\\tvec3 T = normalize( ( - q0 * st1.s + q1 * st0.s ) * scale );\\n\\t\\tvec3 N = normalize( surf_norm );\\n\\t\\tmat3 tsn = mat3( S, T, N );\\n\\t\\tmapN.xy *= ( float( gl_FrontFacing ) * 2.0 - 1.0 );\\n\\t\\treturn normalize( tsn * mapN );\\n\\t}\\n#endif\";\n\nvar clearcoat_normal_fragment_begin = \"#ifdef CLEARCOAT\\n\\tvec3 clearcoatNormal = geometryNormal;\\n#endif\";\n\nvar clearcoat_normal_fragment_maps = \"#ifdef USE_CLEARCOAT_NORMALMAP\\n\\tvec3 clearcoatMapN = texture2D( clearcoatNormalMap, vUv ).xyz * 2.0 - 1.0;\\n\\tclearcoatMapN.xy *= clearcoatNormalScale;\\n\\t#ifdef USE_TANGENT\\n\\t\\tclearcoatNormal = normalize( vTBN * clearcoatMapN );\\n\\t#else\\n\\t\\tclearcoatNormal = perturbNormal2Arb( - vViewPosition, clearcoatNormal, clearcoatMapN );\\n\\t#endif\\n#endif\";\n\nvar clearcoat_normalmap_pars_fragment = \"#ifdef USE_CLEARCOAT_NORMALMAP\\n\\tuniform sampler2D clearcoatNormalMap;\\n\\tuniform vec2 clearcoatNormalScale;\\n#endif\";\n\nvar packing = \"vec3 packNormalToRGB( const in vec3 normal ) {\\n\\treturn normalize( normal ) * 0.5 + 0.5;\\n}\\nvec3 unpackRGBToNormal( const in vec3 rgb ) {\\n\\treturn 2.0 * rgb.xyz - 1.0;\\n}\\nconst float PackUpscale = 256. / 255.;const float UnpackDownscale = 255. / 256.;\\nconst vec3 PackFactors = vec3( 256. * 256. * 256., 256. * 256.,  256. );\\nconst vec4 UnpackFactors = UnpackDownscale / vec4( PackFactors, 1. );\\nconst float ShiftRight8 = 1. / 256.;\\nvec4 packDepthToRGBA( const in float v ) {\\n\\tvec4 r = vec4( fract( v * PackFactors ), v );\\n\\tr.yzw -= r.xyz * ShiftRight8;\\treturn r * PackUpscale;\\n}\\nfloat unpackRGBAToDepth( const in vec4 v ) {\\n\\treturn dot( v, UnpackFactors );\\n}\\nvec4 pack2HalfToRGBA( vec2 v ) {\\n\\tvec4 r = vec4( v.x, fract( v.x * 255.0 ), v.y, fract( v.y * 255.0 ));\\n\\treturn vec4( r.x - r.y / 255.0, r.y, r.z - r.w / 255.0, r.w);\\n}\\nvec2 unpackRGBATo2Half( vec4 v ) {\\n\\treturn vec2( v.x + ( v.y / 255.0 ), v.z + ( v.w / 255.0 ) );\\n}\\nfloat viewZToOrthographicDepth( const in float viewZ, const in float near, const in float far ) {\\n\\treturn ( viewZ + near ) / ( near - far );\\n}\\nfloat orthographicDepthToViewZ( const in float linearClipZ, const in float near, const in float far ) {\\n\\treturn linearClipZ * ( near - far ) - near;\\n}\\nfloat viewZToPerspectiveDepth( const in float viewZ, const in float near, const in float far ) {\\n\\treturn (( near + viewZ ) * far ) / (( far - near ) * viewZ );\\n}\\nfloat perspectiveDepthToViewZ( const in float invClipZ, const in float near, const in float far ) {\\n\\treturn ( near * far ) / ( ( far - near ) * invClipZ - far );\\n}\";\n\nvar premultiplied_alpha_fragment = \"#ifdef PREMULTIPLIED_ALPHA\\n\\tgl_FragColor.rgb *= gl_FragColor.a;\\n#endif\";\n\nvar project_vertex = \"vec4 mvPosition = vec4( transformed, 1.0 );\\n#ifdef USE_INSTANCING\\n\\tmvPosition = instanceMatrix * mvPosition;\\n#endif\\nmvPosition = modelViewMatrix * mvPosition;\\ngl_Position = projectionMatrix * mvPosition;\";\n\nvar dithering_fragment = \"#ifdef DITHERING\\n\\tgl_FragColor.rgb = dithering( gl_FragColor.rgb );\\n#endif\";\n\nvar dithering_pars_fragment = \"#ifdef DITHERING\\n\\tvec3 dithering( vec3 color ) {\\n\\t\\tfloat grid_position = rand( gl_FragCoord.xy );\\n\\t\\tvec3 dither_shift_RGB = vec3( 0.25 / 255.0, -0.25 / 255.0, 0.25 / 255.0 );\\n\\t\\tdither_shift_RGB = mix( 2.0 * dither_shift_RGB, -2.0 * dither_shift_RGB, grid_position );\\n\\t\\treturn color + dither_shift_RGB;\\n\\t}\\n#endif\";\n\nvar roughnessmap_fragment = \"float roughnessFactor = roughness;\\n#ifdef USE_ROUGHNESSMAP\\n\\tvec4 texelRoughness = texture2D( roughnessMap, vUv );\\n\\troughnessFactor *= texelRoughness.g;\\n#endif\";\n\nvar roughnessmap_pars_fragment = \"#ifdef USE_ROUGHNESSMAP\\n\\tuniform sampler2D roughnessMap;\\n#endif\";\n\nvar shadowmap_pars_fragment = \"#ifdef USE_SHADOWMAP\\n\\t#if NUM_DIR_LIGHT_SHADOWS > 0\\n\\t\\tuniform sampler2D directionalShadowMap[ NUM_DIR_LIGHT_SHADOWS ];\\n\\t\\tvarying vec4 vDirectionalShadowCoord[ NUM_DIR_LIGHT_SHADOWS ];\\n\\t#endif\\n\\t#if NUM_SPOT_LIGHT_SHADOWS > 0\\n\\t\\tuniform sampler2D spotShadowMap[ NUM_SPOT_LIGHT_SHADOWS ];\\n\\t\\tvarying vec4 vSpotShadowCoord[ NUM_SPOT_LIGHT_SHADOWS ];\\n\\t#endif\\n\\t#if NUM_POINT_LIGHT_SHADOWS > 0\\n\\t\\tuniform sampler2D pointShadowMap[ NUM_POINT_LIGHT_SHADOWS ];\\n\\t\\tvarying vec4 vPointShadowCoord[ NUM_POINT_LIGHT_SHADOWS ];\\n\\t#endif\\n\\tfloat texture2DCompare( sampler2D depths, vec2 uv, float compare ) {\\n\\t\\treturn step( compare, unpackRGBAToDepth( texture2D( depths, uv ) ) );\\n\\t}\\n\\tvec2 texture2DDistribution( sampler2D shadow, vec2 uv ) {\\n\\t\\treturn unpackRGBATo2Half( texture2D( shadow, uv ) );\\n\\t}\\n\\tfloat VSMShadow (sampler2D shadow, vec2 uv, float compare ){\\n\\t\\tfloat occlusion = 1.0;\\n\\t\\tvec2 distribution = texture2DDistribution( shadow, uv );\\n\\t\\tfloat hard_shadow = step( compare , distribution.x );\\n\\t\\tif (hard_shadow != 1.0 ) {\\n\\t\\t\\tfloat distance = compare - distribution.x ;\\n\\t\\t\\tfloat variance = max( 0.00000, distribution.y * distribution.y );\\n\\t\\t\\tfloat softness_probability = variance / (variance + distance * distance );\\t\\t\\tsoftness_probability = clamp( ( softness_probability - 0.3 ) / ( 0.95 - 0.3 ), 0.0, 1.0 );\\t\\t\\tocclusion = clamp( max( hard_shadow, softness_probability ), 0.0, 1.0 );\\n\\t\\t}\\n\\t\\treturn occlusion;\\n\\t}\\n\\tfloat getShadow( sampler2D shadowMap, vec2 shadowMapSize, float shadowBias, float shadowRadius, vec4 shadowCoord ) {\\n\\t\\tfloat shadow = 1.0;\\n\\t\\tshadowCoord.xyz /= shadowCoord.w;\\n\\t\\tshadowCoord.z += shadowBias;\\n\\t\\tbvec4 inFrustumVec = bvec4 ( shadowCoord.x >= 0.0, shadowCoord.x <= 1.0, shadowCoord.y >= 0.0, shadowCoord.y <= 1.0 );\\n\\t\\tbool inFrustum = all( inFrustumVec );\\n\\t\\tbvec2 frustumTestVec = bvec2( inFrustum, shadowCoord.z <= 1.0 );\\n\\t\\tbool frustumTest = all( frustumTestVec );\\n\\t\\tif ( frustumTest ) {\\n\\t\\t#if defined( SHADOWMAP_TYPE_PCF )\\n\\t\\t\\tvec2 texelSize = vec2( 1.0 ) / shadowMapSize;\\n\\t\\t\\tfloat dx0 = - texelSize.x * shadowRadius;\\n\\t\\t\\tfloat dy0 = - texelSize.y * shadowRadius;\\n\\t\\t\\tfloat dx1 = + texelSize.x * shadowRadius;\\n\\t\\t\\tfloat dy1 = + texelSize.y * shadowRadius;\\n\\t\\t\\tfloat dx2 = dx0 / 2.0;\\n\\t\\t\\tfloat dy2 = dy0 / 2.0;\\n\\t\\t\\tfloat dx3 = dx1 / 2.0;\\n\\t\\t\\tfloat dy3 = dy1 / 2.0;\\n\\t\\t\\tshadow = (\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, dy0 ), shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy0 ), shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, dy0 ), shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx2, dy2 ), shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy2 ), shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx3, dy2 ), shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, 0.0 ), shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx2, 0.0 ), shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, shadowCoord.xy, shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx3, 0.0 ), shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, 0.0 ), shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx2, dy3 ), shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy3 ), shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx3, dy3 ), shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, dy1 ), shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy1 ), shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, dy1 ), shadowCoord.z )\\n\\t\\t\\t) * ( 1.0 / 17.0 );\\n\\t\\t#elif defined( SHADOWMAP_TYPE_PCF_SOFT )\\n\\t\\t\\tvec2 texelSize = vec2( 1.0 ) / shadowMapSize;\\n\\t\\t\\tfloat dx = texelSize.x;\\n\\t\\t\\tfloat dy = texelSize.y;\\n\\t\\t\\tvec2 uv = shadowCoord.xy;\\n\\t\\t\\tvec2 f = fract( uv * shadowMapSize + 0.5 );\\n\\t\\t\\tuv -= f * texelSize;\\n\\t\\t\\tshadow = (\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, uv, shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, uv + vec2( dx, 0.0 ), shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, uv + vec2( 0.0, dy ), shadowCoord.z ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, uv + texelSize, shadowCoord.z ) +\\n\\t\\t\\t\\tmix( texture2DCompare( shadowMap, uv + vec2( -dx, 0.0 ), shadowCoord.z ), \\n\\t\\t\\t\\t\\t texture2DCompare( shadowMap, uv + vec2( 2.0 * dx, 0.0 ), shadowCoord.z ),\\n\\t\\t\\t\\t\\t f.x ) +\\n\\t\\t\\t\\tmix( texture2DCompare( shadowMap, uv + vec2( -dx, dy ), shadowCoord.z ), \\n\\t\\t\\t\\t\\t texture2DCompare( shadowMap, uv + vec2( 2.0 * dx, dy ), shadowCoord.z ),\\n\\t\\t\\t\\t\\t f.x ) +\\n\\t\\t\\t\\tmix( texture2DCompare( shadowMap, uv + vec2( 0.0, -dy ), shadowCoord.z ), \\n\\t\\t\\t\\t\\t texture2DCompare( shadowMap, uv + vec2( 0.0, 2.0 * dy ), shadowCoord.z ),\\n\\t\\t\\t\\t\\t f.y ) +\\n\\t\\t\\t\\tmix( texture2DCompare( shadowMap, uv + vec2( dx, -dy ), shadowCoord.z ), \\n\\t\\t\\t\\t\\t texture2DCompare( shadowMap, uv + vec2( dx, 2.0 * dy ), shadowCoord.z ),\\n\\t\\t\\t\\t\\t f.y ) +\\n\\t\\t\\t\\tmix( mix( texture2DCompare( shadowMap, uv + vec2( -dx, -dy ), shadowCoord.z ), \\n\\t\\t\\t\\t\\t\\t  texture2DCompare( shadowMap, uv + vec2( 2.0 * dx, -dy ), shadowCoord.z ),\\n\\t\\t\\t\\t\\t\\t  f.x ),\\n\\t\\t\\t\\t\\t mix( texture2DCompare( shadowMap, uv + vec2( -dx, 2.0 * dy ), shadowCoord.z ), \\n\\t\\t\\t\\t\\t\\t  texture2DCompare( shadowMap, uv + + vec2( 2.0 * dx, 2.0 * dy ), shadowCoord.z ),\\n\\t\\t\\t\\t\\t\\t  f.x ),\\n\\t\\t\\t\\t\\t f.y )\\n\\t\\t\\t) * ( 1.0 / 9.0 );\\n\\t\\t#elif defined( SHADOWMAP_TYPE_VSM )\\n\\t\\t\\tshadow = VSMShadow( shadowMap, shadowCoord.xy, shadowCoord.z );\\n\\t\\t#else\\n\\t\\t\\tshadow = texture2DCompare( shadowMap, shadowCoord.xy, shadowCoord.z );\\n\\t\\t#endif\\n\\t\\t}\\n\\t\\treturn shadow;\\n\\t}\\n\\tvec2 cubeToUV( vec3 v, float texelSizeY ) {\\n\\t\\tvec3 absV = abs( v );\\n\\t\\tfloat scaleToCube = 1.0 / max( absV.x, max( absV.y, absV.z ) );\\n\\t\\tabsV *= scaleToCube;\\n\\t\\tv *= scaleToCube * ( 1.0 - 2.0 * texelSizeY );\\n\\t\\tvec2 planar = v.xy;\\n\\t\\tfloat almostATexel = 1.5 * texelSizeY;\\n\\t\\tfloat almostOne = 1.0 - almostATexel;\\n\\t\\tif ( absV.z >= almostOne ) {\\n\\t\\t\\tif ( v.z > 0.0 )\\n\\t\\t\\t\\tplanar.x = 4.0 - v.x;\\n\\t\\t} else if ( absV.x >= almostOne ) {\\n\\t\\t\\tfloat signX = sign( v.x );\\n\\t\\t\\tplanar.x = v.z * signX + 2.0 * signX;\\n\\t\\t} else if ( absV.y >= almostOne ) {\\n\\t\\t\\tfloat signY = sign( v.y );\\n\\t\\t\\tplanar.x = v.x + 2.0 * signY + 2.0;\\n\\t\\t\\tplanar.y = v.z * signY - 2.0;\\n\\t\\t}\\n\\t\\treturn vec2( 0.125, 0.25 ) * planar + vec2( 0.375, 0.75 );\\n\\t}\\n\\tfloat getPointShadow( sampler2D shadowMap, vec2 shadowMapSize, float shadowBias, float shadowRadius, vec4 shadowCoord, float shadowCameraNear, float shadowCameraFar ) {\\n\\t\\tvec2 texelSize = vec2( 1.0 ) / ( shadowMapSize * vec2( 4.0, 2.0 ) );\\n\\t\\tvec3 lightToPosition = shadowCoord.xyz;\\n\\t\\tfloat dp = ( length( lightToPosition ) - shadowCameraNear ) / ( shadowCameraFar - shadowCameraNear );\\t\\tdp += shadowBias;\\n\\t\\tvec3 bd3D = normalize( lightToPosition );\\n\\t\\t#if defined( SHADOWMAP_TYPE_PCF ) || defined( SHADOWMAP_TYPE_PCF_SOFT ) || defined( SHADOWMAP_TYPE_VSM )\\n\\t\\t\\tvec2 offset = vec2( - 1, 1 ) * shadowRadius * texelSize.y;\\n\\t\\t\\treturn (\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.xyy, texelSize.y ), dp ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.yyy, texelSize.y ), dp ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.xyx, texelSize.y ), dp ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.yyx, texelSize.y ), dp ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, cubeToUV( bd3D, texelSize.y ), dp ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.xxy, texelSize.y ), dp ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.yxy, texelSize.y ), dp ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.xxx, texelSize.y ), dp ) +\\n\\t\\t\\t\\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.yxx, texelSize.y ), dp )\\n\\t\\t\\t) * ( 1.0 / 9.0 );\\n\\t\\t#else\\n\\t\\t\\treturn texture2DCompare( shadowMap, cubeToUV( bd3D, texelSize.y ), dp );\\n\\t\\t#endif\\n\\t}\\n#endif\";\n\nvar shadowmap_pars_vertex = \"#ifdef USE_SHADOWMAP\\n\\t#if NUM_DIR_LIGHT_SHADOWS > 0\\n\\t\\tuniform mat4 directionalShadowMatrix[ NUM_DIR_LIGHT_SHADOWS ];\\n\\t\\tvarying vec4 vDirectionalShadowCoord[ NUM_DIR_LIGHT_SHADOWS ];\\n\\t#endif\\n\\t#if NUM_SPOT_LIGHT_SHADOWS > 0\\n\\t\\tuniform mat4 spotShadowMatrix[ NUM_SPOT_LIGHT_SHADOWS ];\\n\\t\\tvarying vec4 vSpotShadowCoord[ NUM_SPOT_LIGHT_SHADOWS ];\\n\\t#endif\\n\\t#if NUM_POINT_LIGHT_SHADOWS > 0\\n\\t\\tuniform mat4 pointShadowMatrix[ NUM_POINT_LIGHT_SHADOWS ];\\n\\t\\tvarying vec4 vPointShadowCoord[ NUM_POINT_LIGHT_SHADOWS ];\\n\\t#endif\\n#endif\";\n\nvar shadowmap_vertex = \"#ifdef USE_SHADOWMAP\\n\\t#if NUM_DIR_LIGHT_SHADOWS > 0\\n\\t#pragma unroll_loop\\n\\tfor ( int i = 0; i < NUM_DIR_LIGHT_SHADOWS; i ++ ) {\\n\\t\\tvDirectionalShadowCoord[ i ] = directionalShadowMatrix[ i ] * worldPosition;\\n\\t}\\n\\t#endif\\n\\t#if NUM_SPOT_LIGHT_SHADOWS > 0\\n\\t#pragma unroll_loop\\n\\tfor ( int i = 0; i < NUM_SPOT_LIGHT_SHADOWS; i ++ ) {\\n\\t\\tvSpotShadowCoord[ i ] = spotShadowMatrix[ i ] * worldPosition;\\n\\t}\\n\\t#endif\\n\\t#if NUM_POINT_LIGHT_SHADOWS > 0\\n\\t#pragma unroll_loop\\n\\tfor ( int i = 0; i < NUM_POINT_LIGHT_SHADOWS; i ++ ) {\\n\\t\\tvPointShadowCoord[ i ] = pointShadowMatrix[ i ] * worldPosition;\\n\\t}\\n\\t#endif\\n#endif\";\n\nvar shadowmask_pars_fragment = \"float getShadowMask() {\\n\\tfloat shadow = 1.0;\\n\\t#ifdef USE_SHADOWMAP\\n\\t#if NUM_DIR_LIGHT_SHADOWS > 0\\n\\tDirectionalLightShadow directionalLight;\\n\\t#pragma unroll_loop\\n\\tfor ( int i = 0; i < NUM_DIR_LIGHT_SHADOWS; i ++ ) {\\n\\t\\tdirectionalLight = directionalLightShadows[ i ];\\n\\t\\tshadow *= receiveShadow ? getShadow( directionalShadowMap[ i ], directionalLight.shadowMapSize, directionalLight.shadowBias, directionalLight.shadowRadius, vDirectionalShadowCoord[ i ] ) : 1.0;\\n\\t}\\n\\t#endif\\n\\t#if NUM_SPOT_LIGHT_SHADOWS > 0\\n\\tSpotLightShadow spotLight;\\n\\t#pragma unroll_loop\\n\\tfor ( int i = 0; i < NUM_SPOT_LIGHT_SHADOWS; i ++ ) {\\n\\t\\tspotLight = spotLightShadows[ i ];\\n\\t\\tshadow *= receiveShadow ? getShadow( spotShadowMap[ i ], spotLight.shadowMapSize, spotLight.shadowBias, spotLight.shadowRadius, vSpotShadowCoord[ i ] ) : 1.0;\\n\\t}\\n\\t#endif\\n\\t#if NUM_POINT_LIGHT_SHADOWS > 0\\n\\tPointLightShadow pointLight;\\n\\t#pragma unroll_loop\\n\\tfor ( int i = 0; i < NUM_POINT_LIGHT_SHADOWS; i ++ ) {\\n\\t\\tpointLight = pointLightShadows[ i ];\\n\\t\\tshadow *= receiveShadow ? getPointShadow( pointShadowMap[ i ], pointLight.shadowMapSize, pointLight.shadowBias, pointLight.shadowRadius, vPointShadowCoord[ i ], pointLight.shadowCameraNear, pointLight.shadowCameraFar ) : 1.0;\\n\\t}\\n\\t#endif\\n\\t#endif\\n\\treturn shadow;\\n}\";\n\nvar skinbase_vertex = \"#ifdef USE_SKINNING\\n\\tmat4 boneMatX = getBoneMatrix( skinIndex.x );\\n\\tmat4 boneMatY = getBoneMatrix( skinIndex.y );\\n\\tmat4 boneMatZ = getBoneMatrix( skinIndex.z );\\n\\tmat4 boneMatW = getBoneMatrix( skinIndex.w );\\n#endif\";\n\nvar skinning_pars_vertex = \"#ifdef USE_SKINNING\\n\\tuniform mat4 bindMatrix;\\n\\tuniform mat4 bindMatrixInverse;\\n\\t#ifdef BONE_TEXTURE\\n\\t\\tuniform highp sampler2D boneTexture;\\n\\t\\tuniform int boneTextureSize;\\n\\t\\tmat4 getBoneMatrix( const in float i ) {\\n\\t\\t\\tfloat j = i * 4.0;\\n\\t\\t\\tfloat x = mod( j, float( boneTextureSize ) );\\n\\t\\t\\tfloat y = floor( j / float( boneTextureSize ) );\\n\\t\\t\\tfloat dx = 1.0 / float( boneTextureSize );\\n\\t\\t\\tfloat dy = 1.0 / float( boneTextureSize );\\n\\t\\t\\ty = dy * ( y + 0.5 );\\n\\t\\t\\tvec4 v1 = texture2D( boneTexture, vec2( dx * ( x + 0.5 ), y ) );\\n\\t\\t\\tvec4 v2 = texture2D( boneTexture, vec2( dx * ( x + 1.5 ), y ) );\\n\\t\\t\\tvec4 v3 = texture2D( boneTexture, vec2( dx * ( x + 2.5 ), y ) );\\n\\t\\t\\tvec4 v4 = texture2D( boneTexture, vec2( dx * ( x + 3.5 ), y ) );\\n\\t\\t\\tmat4 bone = mat4( v1, v2, v3, v4 );\\n\\t\\t\\treturn bone;\\n\\t\\t}\\n\\t#else\\n\\t\\tuniform mat4 boneMatrices[ MAX_BONES ];\\n\\t\\tmat4 getBoneMatrix( const in float i ) {\\n\\t\\t\\tmat4 bone = boneMatrices[ int(i) ];\\n\\t\\t\\treturn bone;\\n\\t\\t}\\n\\t#endif\\n#endif\";\n\nvar skinning_vertex = \"#ifdef USE_SKINNING\\n\\tvec4 skinVertex = bindMatrix * vec4( transformed, 1.0 );\\n\\tvec4 skinned = vec4( 0.0 );\\n\\tskinned += boneMatX * skinVertex * skinWeight.x;\\n\\tskinned += boneMatY * skinVertex * skinWeight.y;\\n\\tskinned += boneMatZ * skinVertex * skinWeight.z;\\n\\tskinned += boneMatW * skinVertex * skinWeight.w;\\n\\ttransformed = ( bindMatrixInverse * skinned ).xyz;\\n#endif\";\n\nvar skinnormal_vertex = \"#ifdef USE_SKINNING\\n\\tmat4 skinMatrix = mat4( 0.0 );\\n\\tskinMatrix += skinWeight.x * boneMatX;\\n\\tskinMatrix += skinWeight.y * boneMatY;\\n\\tskinMatrix += skinWeight.z * boneMatZ;\\n\\tskinMatrix += skinWeight.w * boneMatW;\\n\\tskinMatrix  = bindMatrixInverse * skinMatrix * bindMatrix;\\n\\tobjectNormal = vec4( skinMatrix * vec4( objectNormal, 0.0 ) ).xyz;\\n\\t#ifdef USE_TANGENT\\n\\t\\tobjectTangent = vec4( skinMatrix * vec4( objectTangent, 0.0 ) ).xyz;\\n\\t#endif\\n#endif\";\n\nvar specularmap_fragment = \"float specularStrength;\\n#ifdef USE_SPECULARMAP\\n\\tvec4 texelSpecular = texture2D( specularMap, vUv );\\n\\tspecularStrength = texelSpecular.r;\\n#else\\n\\tspecularStrength = 1.0;\\n#endif\";\n\nvar specularmap_pars_fragment = \"#ifdef USE_SPECULARMAP\\n\\tuniform sampler2D specularMap;\\n#endif\";\n\nvar tonemapping_fragment = \"#if defined( TONE_MAPPING )\\n\\tgl_FragColor.rgb = toneMapping( gl_FragColor.rgb );\\n#endif\";\n\nvar tonemapping_pars_fragment = \"#ifndef saturate\\n#define saturate(a) clamp( a, 0.0, 1.0 )\\n#endif\\nuniform float toneMappingExposure;\\nuniform float toneMappingWhitePoint;\\nvec3 LinearToneMapping( vec3 color ) {\\n\\treturn toneMappingExposure * color;\\n}\\nvec3 ReinhardToneMapping( vec3 color ) {\\n\\tcolor *= toneMappingExposure;\\n\\treturn saturate( color / ( vec3( 1.0 ) + color ) );\\n}\\n#define Uncharted2Helper( x ) max( ( ( x * ( 0.15 * x + 0.10 * 0.50 ) + 0.20 * 0.02 ) / ( x * ( 0.15 * x + 0.50 ) + 0.20 * 0.30 ) ) - 0.02 / 0.30, vec3( 0.0 ) )\\nvec3 Uncharted2ToneMapping( vec3 color ) {\\n\\tcolor *= toneMappingExposure;\\n\\treturn saturate( Uncharted2Helper( color ) / Uncharted2Helper( vec3( toneMappingWhitePoint ) ) );\\n}\\nvec3 OptimizedCineonToneMapping( vec3 color ) {\\n\\tcolor *= toneMappingExposure;\\n\\tcolor = max( vec3( 0.0 ), color - 0.004 );\\n\\treturn pow( ( color * ( 6.2 * color + 0.5 ) ) / ( color * ( 6.2 * color + 1.7 ) + 0.06 ), vec3( 2.2 ) );\\n}\\nvec3 ACESFilmicToneMapping( vec3 color ) {\\n\\tcolor *= toneMappingExposure;\\n\\treturn saturate( ( color * ( 2.51 * color + 0.03 ) ) / ( color * ( 2.43 * color + 0.59 ) + 0.14 ) );\\n}\";\n\nvar uv_pars_fragment = \"#if ( defined( USE_UV ) && ! defined( UVS_VERTEX_ONLY ) )\\n\\tvarying vec2 vUv;\\n#endif\";\n\nvar uv_pars_vertex = \"#ifdef USE_UV\\n\\t#ifdef UVS_VERTEX_ONLY\\n\\t\\tvec2 vUv;\\n\\t#else\\n\\t\\tvarying vec2 vUv;\\n\\t#endif\\n\\tuniform mat3 uvTransform;\\n#endif\";\n\nvar uv_vertex = \"#ifdef USE_UV\\n\\tvUv = ( uvTransform * vec3( uv, 1 ) ).xy;\\n#endif\";\n\nvar uv2_pars_fragment = \"#if defined( USE_LIGHTMAP ) || defined( USE_AOMAP )\\n\\tvarying vec2 vUv2;\\n#endif\";\n\nvar uv2_pars_vertex = \"#if defined( USE_LIGHTMAP ) || defined( USE_AOMAP )\\n\\tattribute vec2 uv2;\\n\\tvarying vec2 vUv2;\\n\\tuniform mat3 uv2Transform;\\n#endif\";\n\nvar uv2_vertex = \"#if defined( USE_LIGHTMAP ) || defined( USE_AOMAP )\\n\\tvUv2 = ( uv2Transform * vec3( uv2, 1 ) ).xy;\\n#endif\";\n\nvar worldpos_vertex = \"#if defined( USE_ENVMAP ) || defined( DISTANCE ) || defined ( USE_SHADOWMAP )\\n\\tvec4 worldPosition = vec4( transformed, 1.0 );\\n\\t#ifdef USE_INSTANCING\\n\\t\\tworldPosition = instanceMatrix * worldPosition;\\n\\t#endif\\n\\tworldPosition = modelMatrix * worldPosition;\\n#endif\";\n\nvar background_frag = \"uniform sampler2D t2D;\\nvarying vec2 vUv;\\nvoid main() {\\n\\tvec4 texColor = texture2D( t2D, vUv );\\n\\tgl_FragColor = mapTexelToLinear( texColor );\\n\\t#include <tonemapping_fragment>\\n\\t#include <encodings_fragment>\\n}\";\n\nvar background_vert = \"varying vec2 vUv;\\nuniform mat3 uvTransform;\\nvoid main() {\\n\\tvUv = ( uvTransform * vec3( uv, 1 ) ).xy;\\n\\tgl_Position = vec4( position.xy, 1.0, 1.0 );\\n}\";\n\nvar cube_frag = \"#include <envmap_common_pars_fragment>\\nuniform float opacity;\\nvarying vec3 vWorldDirection;\\n#include <cube_uv_reflection_fragment>\\nvoid main() {\\n\\tvec3 vReflect = vWorldDirection;\\n\\t#include <envmap_fragment>\\n\\tgl_FragColor = envColor;\\n\\tgl_FragColor.a *= opacity;\\n\\t#include <tonemapping_fragment>\\n\\t#include <encodings_fragment>\\n}\";\n\nvar cube_vert = \"varying vec3 vWorldDirection;\\n#include <common>\\nvoid main() {\\n\\tvWorldDirection = transformDirection( position, modelMatrix );\\n\\t#include <begin_vertex>\\n\\t#include <project_vertex>\\n\\tgl_Position.z = gl_Position.w;\\n}\";\n\nvar depth_frag = \"#if DEPTH_PACKING == 3200\\n\\tuniform float opacity;\\n#endif\\n#include <common>\\n#include <packing>\\n#include <uv_pars_fragment>\\n#include <map_pars_fragment>\\n#include <alphamap_pars_fragment>\\n#include <logdepthbuf_pars_fragment>\\n#include <clipping_planes_pars_fragment>\\nvarying vec2 vHighPrecisionZW;\\nvoid main() {\\n\\t#include <clipping_planes_fragment>\\n\\tvec4 diffuseColor = vec4( 1.0 );\\n\\t#if DEPTH_PACKING == 3200\\n\\t\\tdiffuseColor.a = opacity;\\n\\t#endif\\n\\t#include <map_fragment>\\n\\t#include <alphamap_fragment>\\n\\t#include <alphatest_fragment>\\n\\t#include <logdepthbuf_fragment>\\n\\tfloat fragCoordZ = 0.5 * vHighPrecisionZW[0] / vHighPrecisionZW[1] + 0.5;\\n\\t#if DEPTH_PACKING == 3200\\n\\t\\tgl_FragColor = vec4( vec3( 1.0 - fragCoordZ ), opacity );\\n\\t#elif DEPTH_PACKING == 3201\\n\\t\\tgl_FragColor = packDepthToRGBA( fragCoordZ );\\n\\t#endif\\n}\";\n\nvar depth_vert = \"#include <common>\\n#include <uv_pars_vertex>\\n#include <displacementmap_pars_vertex>\\n#include <morphtarget_pars_vertex>\\n#include <skinning_pars_vertex>\\n#include <logdepthbuf_pars_vertex>\\n#include <clipping_planes_pars_vertex>\\nvarying vec2 vHighPrecisionZW;\\nvoid main() {\\n\\t#include <uv_vertex>\\n\\t#include <skinbase_vertex>\\n\\t#ifdef USE_DISPLACEMENTMAP\\n\\t\\t#include <beginnormal_vertex>\\n\\t\\t#include <morphnormal_vertex>\\n\\t\\t#include <skinnormal_vertex>\\n\\t#endif\\n\\t#include <begin_vertex>\\n\\t#include <morphtarget_vertex>\\n\\t#include <skinning_vertex>\\n\\t#include <displacementmap_vertex>\\n\\t#include <project_vertex>\\n\\t#include <logdepthbuf_vertex>\\n\\t#include <clipping_planes_vertex>\\n\\tvHighPrecisionZW = gl_Position.zw;\\n}\";\n\nvar distanceRGBA_frag = \"#define DISTANCE\\nuniform vec3 referencePosition;\\nuniform float nearDistance;\\nuniform float farDistance;\\nvarying vec3 vWorldPosition;\\n#include <common>\\n#include <packing>\\n#include <uv_pars_fragment>\\n#include <map_pars_fragment>\\n#include <alphamap_pars_fragment>\\n#include <clipping_planes_pars_fragment>\\nvoid main () {\\n\\t#include <clipping_planes_fragment>\\n\\tvec4 diffuseColor = vec4( 1.0 );\\n\\t#include <map_fragment>\\n\\t#include <alphamap_fragment>\\n\\t#include <alphatest_fragment>\\n\\tfloat dist = length( vWorldPosition - referencePosition );\\n\\tdist = ( dist - nearDistance ) / ( farDistance - nearDistance );\\n\\tdist = saturate( dist );\\n\\tgl_FragColor = packDepthToRGBA( dist );\\n}\";\n\nvar distanceRGBA_vert = \"#define DISTANCE\\nvarying vec3 vWorldPosition;\\n#include <common>\\n#include <uv_pars_vertex>\\n#include <displacementmap_pars_vertex>\\n#include <morphtarget_pars_vertex>\\n#include <skinning_pars_vertex>\\n#include <clipping_planes_pars_vertex>\\nvoid main() {\\n\\t#include <uv_vertex>\\n\\t#include <skinbase_vertex>\\n\\t#ifdef USE_DISPLACEMENTMAP\\n\\t\\t#include <beginnormal_vertex>\\n\\t\\t#include <morphnormal_vertex>\\n\\t\\t#include <skinnormal_vertex>\\n\\t#endif\\n\\t#include <begin_vertex>\\n\\t#include <morphtarget_vertex>\\n\\t#include <skinning_vertex>\\n\\t#include <displacementmap_vertex>\\n\\t#include <project_vertex>\\n\\t#include <worldpos_vertex>\\n\\t#include <clipping_planes_vertex>\\n\\tvWorldPosition = worldPosition.xyz;\\n}\";\n\nvar equirect_frag = \"uniform sampler2D tEquirect;\\nvarying vec3 vWorldDirection;\\n#include <common>\\nvoid main() {\\n\\tvec3 direction = normalize( vWorldDirection );\\n\\tvec2 sampleUV;\\n\\tsampleUV.y = asin( clamp( direction.y, - 1.0, 1.0 ) ) * RECIPROCAL_PI + 0.5;\\n\\tsampleUV.x = atan( direction.z, direction.x ) * RECIPROCAL_PI2 + 0.5;\\n\\tvec4 texColor = texture2D( tEquirect, sampleUV );\\n\\tgl_FragColor = mapTexelToLinear( texColor );\\n\\t#include <tonemapping_fragment>\\n\\t#include <encodings_fragment>\\n}\";\n\nvar equirect_vert = \"varying vec3 vWorldDirection;\\n#include <common>\\nvoid main() {\\n\\tvWorldDirection = transformDirection( position, modelMatrix );\\n\\t#include <begin_vertex>\\n\\t#include <project_vertex>\\n}\";\n\nvar linedashed_frag = \"uniform vec3 diffuse;\\nuniform float opacity;\\nuniform float dashSize;\\nuniform float totalSize;\\nvarying float vLineDistance;\\n#include <common>\\n#include <color_pars_fragment>\\n#include <fog_pars_fragment>\\n#include <logdepthbuf_pars_fragment>\\n#include <clipping_planes_pars_fragment>\\nvoid main() {\\n\\t#include <clipping_planes_fragment>\\n\\tif ( mod( vLineDistance, totalSize ) > dashSize ) {\\n\\t\\tdiscard;\\n\\t}\\n\\tvec3 outgoingLight = vec3( 0.0 );\\n\\tvec4 diffuseColor = vec4( diffuse, opacity );\\n\\t#include <logdepthbuf_fragment>\\n\\t#include <color_fragment>\\n\\toutgoingLight = diffuseColor.rgb;\\n\\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\\n\\t#include <tonemapping_fragment>\\n\\t#include <encodings_fragment>\\n\\t#include <fog_fragment>\\n\\t#include <premultiplied_alpha_fragment>\\n}\";\n\nvar linedashed_vert = \"uniform float scale;\\nattribute float lineDistance;\\nvarying float vLineDistance;\\n#include <common>\\n#include <color_pars_vertex>\\n#include <fog_pars_vertex>\\n#include <logdepthbuf_pars_vertex>\\n#include <clipping_planes_pars_vertex>\\nvoid main() {\\n\\t#include <color_vertex>\\n\\tvLineDistance = scale * lineDistance;\\n\\tvec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );\\n\\tgl_Position = projectionMatrix * mvPosition;\\n\\t#include <logdepthbuf_vertex>\\n\\t#include <clipping_planes_vertex>\\n\\t#include <fog_vertex>\\n}\";\n\nvar meshbasic_frag = \"uniform vec3 diffuse;\\nuniform float opacity;\\n#ifndef FLAT_SHADED\\n\\tvarying vec3 vNormal;\\n#endif\\n#include <common>\\n#include <color_pars_fragment>\\n#include <uv_pars_fragment>\\n#include <uv2_pars_fragment>\\n#include <map_pars_fragment>\\n#include <alphamap_pars_fragment>\\n#include <aomap_pars_fragment>\\n#include <lightmap_pars_fragment>\\n#include <envmap_common_pars_fragment>\\n#include <envmap_pars_fragment>\\n#include <cube_uv_reflection_fragment>\\n#include <fog_pars_fragment>\\n#include <specularmap_pars_fragment>\\n#include <logdepthbuf_pars_fragment>\\n#include <clipping_planes_pars_fragment>\\nvoid main() {\\n\\t#include <clipping_planes_fragment>\\n\\tvec4 diffuseColor = vec4( diffuse, opacity );\\n\\t#include <logdepthbuf_fragment>\\n\\t#include <map_fragment>\\n\\t#include <color_fragment>\\n\\t#include <alphamap_fragment>\\n\\t#include <alphatest_fragment>\\n\\t#include <specularmap_fragment>\\n\\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\\n\\t#ifdef USE_LIGHTMAP\\n\\t\\n\\t\\tvec4 lightMapTexel= texture2D( lightMap, vUv2 );\\n\\t\\treflectedLight.indirectDiffuse += lightMapTexelToLinear( lightMapTexel ).rgb * lightMapIntensity;\\n\\t#else\\n\\t\\treflectedLight.indirectDiffuse += vec3( 1.0 );\\n\\t#endif\\n\\t#include <aomap_fragment>\\n\\treflectedLight.indirectDiffuse *= diffuseColor.rgb;\\n\\tvec3 outgoingLight = reflectedLight.indirectDiffuse;\\n\\t#include <envmap_fragment>\\n\\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\\n\\t#include <tonemapping_fragment>\\n\\t#include <encodings_fragment>\\n\\t#include <fog_fragment>\\n\\t#include <premultiplied_alpha_fragment>\\n}\";\n\nvar meshbasic_vert = \"#include <common>\\n#include <uv_pars_vertex>\\n#include <uv2_pars_vertex>\\n#include <envmap_pars_vertex>\\n#include <color_pars_vertex>\\n#include <fog_pars_vertex>\\n#include <morphtarget_pars_vertex>\\n#include <skinning_pars_vertex>\\n#include <logdepthbuf_pars_vertex>\\n#include <clipping_planes_pars_vertex>\\nvoid main() {\\n\\t#include <uv_vertex>\\n\\t#include <uv2_vertex>\\n\\t#include <color_vertex>\\n\\t#include <skinbase_vertex>\\n\\t#ifdef USE_ENVMAP\\n\\t#include <beginnormal_vertex>\\n\\t#include <morphnormal_vertex>\\n\\t#include <skinnormal_vertex>\\n\\t#include <defaultnormal_vertex>\\n\\t#endif\\n\\t#include <begin_vertex>\\n\\t#include <morphtarget_vertex>\\n\\t#include <skinning_vertex>\\n\\t#include <project_vertex>\\n\\t#include <logdepthbuf_vertex>\\n\\t#include <worldpos_vertex>\\n\\t#include <clipping_planes_vertex>\\n\\t#include <envmap_vertex>\\n\\t#include <fog_vertex>\\n}\";\n\nvar meshlambert_frag = \"uniform vec3 diffuse;\\nuniform vec3 emissive;\\nuniform float opacity;\\nvarying vec3 vLightFront;\\nvarying vec3 vIndirectFront;\\n#ifdef DOUBLE_SIDED\\n\\tvarying vec3 vLightBack;\\n\\tvarying vec3 vIndirectBack;\\n#endif\\n#include <common>\\n#include <packing>\\n#include <dithering_pars_fragment>\\n#include <color_pars_fragment>\\n#include <uv_pars_fragment>\\n#include <uv2_pars_fragment>\\n#include <map_pars_fragment>\\n#include <alphamap_pars_fragment>\\n#include <aomap_pars_fragment>\\n#include <lightmap_pars_fragment>\\n#include <emissivemap_pars_fragment>\\n#include <envmap_common_pars_fragment>\\n#include <envmap_pars_fragment>\\n#include <cube_uv_reflection_fragment>\\n#include <bsdfs>\\n#include <lights_pars_begin>\\n#include <fog_pars_fragment>\\n#include <shadowmap_pars_fragment>\\n#include <shadowmask_pars_fragment>\\n#include <specularmap_pars_fragment>\\n#include <logdepthbuf_pars_fragment>\\n#include <clipping_planes_pars_fragment>\\nvoid main() {\\n\\t#include <clipping_planes_fragment>\\n\\tvec4 diffuseColor = vec4( diffuse, opacity );\\n\\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\\n\\tvec3 totalEmissiveRadiance = emissive;\\n\\t#include <logdepthbuf_fragment>\\n\\t#include <map_fragment>\\n\\t#include <color_fragment>\\n\\t#include <alphamap_fragment>\\n\\t#include <alphatest_fragment>\\n\\t#include <specularmap_fragment>\\n\\t#include <emissivemap_fragment>\\n\\treflectedLight.indirectDiffuse = getAmbientLightIrradiance( ambientLightColor );\\n\\t#ifdef DOUBLE_SIDED\\n\\t\\treflectedLight.indirectDiffuse += ( gl_FrontFacing ) ? vIndirectFront : vIndirectBack;\\n\\t#else\\n\\t\\treflectedLight.indirectDiffuse += vIndirectFront;\\n\\t#endif\\n\\t#include <lightmap_fragment>\\n\\treflectedLight.indirectDiffuse *= BRDF_Diffuse_Lambert( diffuseColor.rgb );\\n\\t#ifdef DOUBLE_SIDED\\n\\t\\treflectedLight.directDiffuse = ( gl_FrontFacing ) ? vLightFront : vLightBack;\\n\\t#else\\n\\t\\treflectedLight.directDiffuse = vLightFront;\\n\\t#endif\\n\\treflectedLight.directDiffuse *= BRDF_Diffuse_Lambert( diffuseColor.rgb ) * getShadowMask();\\n\\t#include <aomap_fragment>\\n\\tvec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + totalEmissiveRadiance;\\n\\t#include <envmap_fragment>\\n\\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\\n\\t#include <tonemapping_fragment>\\n\\t#include <encodings_fragment>\\n\\t#include <fog_fragment>\\n\\t#include <premultiplied_alpha_fragment>\\n\\t#include <dithering_fragment>\\n}\";\n\nvar meshlambert_vert = \"#define LAMBERT\\nvarying vec3 vLightFront;\\nvarying vec3 vIndirectFront;\\n#ifdef DOUBLE_SIDED\\n\\tvarying vec3 vLightBack;\\n\\tvarying vec3 vIndirectBack;\\n#endif\\n#include <common>\\n#include <uv_pars_vertex>\\n#include <uv2_pars_vertex>\\n#include <envmap_pars_vertex>\\n#include <bsdfs>\\n#include <lights_pars_begin>\\n#include <color_pars_vertex>\\n#include <fog_pars_vertex>\\n#include <morphtarget_pars_vertex>\\n#include <skinning_pars_vertex>\\n#include <shadowmap_pars_vertex>\\n#include <logdepthbuf_pars_vertex>\\n#include <clipping_planes_pars_vertex>\\nvoid main() {\\n\\t#include <uv_vertex>\\n\\t#include <uv2_vertex>\\n\\t#include <color_vertex>\\n\\t#include <beginnormal_vertex>\\n\\t#include <morphnormal_vertex>\\n\\t#include <skinbase_vertex>\\n\\t#include <skinnormal_vertex>\\n\\t#include <defaultnormal_vertex>\\n\\t#include <begin_vertex>\\n\\t#include <morphtarget_vertex>\\n\\t#include <skinning_vertex>\\n\\t#include <project_vertex>\\n\\t#include <logdepthbuf_vertex>\\n\\t#include <clipping_planes_vertex>\\n\\t#include <worldpos_vertex>\\n\\t#include <envmap_vertex>\\n\\t#include <lights_lambert_vertex>\\n\\t#include <shadowmap_vertex>\\n\\t#include <fog_vertex>\\n}\";\n\nvar meshmatcap_frag = \"#define MATCAP\\nuniform vec3 diffuse;\\nuniform float opacity;\\nuniform sampler2D matcap;\\nvarying vec3 vViewPosition;\\n#ifndef FLAT_SHADED\\n\\tvarying vec3 vNormal;\\n#endif\\n#include <common>\\n#include <uv_pars_fragment>\\n#include <map_pars_fragment>\\n#include <alphamap_pars_fragment>\\n#include <fog_pars_fragment>\\n#include <bumpmap_pars_fragment>\\n#include <normalmap_pars_fragment>\\n#include <logdepthbuf_pars_fragment>\\n#include <clipping_planes_pars_fragment>\\nvoid main() {\\n\\t#include <clipping_planes_fragment>\\n\\tvec4 diffuseColor = vec4( diffuse, opacity );\\n\\t#include <logdepthbuf_fragment>\\n\\t#include <map_fragment>\\n\\t#include <alphamap_fragment>\\n\\t#include <alphatest_fragment>\\n\\t#include <normal_fragment_begin>\\n\\t#include <normal_fragment_maps>\\n\\tvec3 viewDir = normalize( vViewPosition );\\n\\tvec3 x = normalize( vec3( viewDir.z, 0.0, - viewDir.x ) );\\n\\tvec3 y = cross( viewDir, x );\\n\\tvec2 uv = vec2( dot( x, normal ), dot( y, normal ) ) * 0.495 + 0.5;\\n\\t#ifdef USE_MATCAP\\n\\t\\tvec4 matcapColor = texture2D( matcap, uv );\\n\\t\\tmatcapColor = matcapTexelToLinear( matcapColor );\\n\\t#else\\n\\t\\tvec4 matcapColor = vec4( 1.0 );\\n\\t#endif\\n\\tvec3 outgoingLight = diffuseColor.rgb * matcapColor.rgb;\\n\\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\\n\\t#include <tonemapping_fragment>\\n\\t#include <encodings_fragment>\\n\\t#include <fog_fragment>\\n\\t#include <premultiplied_alpha_fragment>\\n}\";\n\nvar meshmatcap_vert = \"#define MATCAP\\nvarying vec3 vViewPosition;\\n#ifndef FLAT_SHADED\\n\\tvarying vec3 vNormal;\\n#endif\\n#include <common>\\n#include <uv_pars_vertex>\\n#include <displacementmap_pars_vertex>\\n#include <fog_pars_vertex>\\n#include <morphtarget_pars_vertex>\\n#include <skinning_pars_vertex>\\n#include <logdepthbuf_pars_vertex>\\n#include <clipping_planes_pars_vertex>\\nvoid main() {\\n\\t#include <uv_vertex>\\n\\t#include <beginnormal_vertex>\\n\\t#include <morphnormal_vertex>\\n\\t#include <skinbase_vertex>\\n\\t#include <skinnormal_vertex>\\n\\t#include <defaultnormal_vertex>\\n\\t#ifndef FLAT_SHADED\\n\\t\\tvNormal = normalize( transformedNormal );\\n\\t#endif\\n\\t#include <begin_vertex>\\n\\t#include <morphtarget_vertex>\\n\\t#include <skinning_vertex>\\n\\t#include <displacementmap_vertex>\\n\\t#include <project_vertex>\\n\\t#include <logdepthbuf_vertex>\\n\\t#include <clipping_planes_vertex>\\n\\t#include <fog_vertex>\\n\\tvViewPosition = - mvPosition.xyz;\\n}\";\n\nvar meshtoon_frag = \"#define TOON\\nuniform vec3 diffuse;\\nuniform vec3 emissive;\\nuniform vec3 specular;\\nuniform float shininess;\\nuniform float opacity;\\n#include <common>\\n#include <packing>\\n#include <dithering_pars_fragment>\\n#include <color_pars_fragment>\\n#include <uv_pars_fragment>\\n#include <uv2_pars_fragment>\\n#include <map_pars_fragment>\\n#include <alphamap_pars_fragment>\\n#include <aomap_pars_fragment>\\n#include <lightmap_pars_fragment>\\n#include <emissivemap_pars_fragment>\\n#include <gradientmap_pars_fragment>\\n#include <fog_pars_fragment>\\n#include <bsdfs>\\n#include <lights_pars_begin>\\n#include <lights_toon_pars_fragment>\\n#include <shadowmap_pars_fragment>\\n#include <bumpmap_pars_fragment>\\n#include <normalmap_pars_fragment>\\n#include <specularmap_pars_fragment>\\n#include <logdepthbuf_pars_fragment>\\n#include <clipping_planes_pars_fragment>\\nvoid main() {\\n\\t#include <clipping_planes_fragment>\\n\\tvec4 diffuseColor = vec4( diffuse, opacity );\\n\\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\\n\\tvec3 totalEmissiveRadiance = emissive;\\n\\t#include <logdepthbuf_fragment>\\n\\t#include <map_fragment>\\n\\t#include <color_fragment>\\n\\t#include <alphamap_fragment>\\n\\t#include <alphatest_fragment>\\n\\t#include <specularmap_fragment>\\n\\t#include <normal_fragment_begin>\\n\\t#include <normal_fragment_maps>\\n\\t#include <emissivemap_fragment>\\n\\t#include <lights_toon_fragment>\\n\\t#include <lights_fragment_begin>\\n\\t#include <lights_fragment_maps>\\n\\t#include <lights_fragment_end>\\n\\t#include <aomap_fragment>\\n\\tvec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + reflectedLight.directSpecular + reflectedLight.indirectSpecular + totalEmissiveRadiance;\\n\\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\\n\\t#include <tonemapping_fragment>\\n\\t#include <encodings_fragment>\\n\\t#include <fog_fragment>\\n\\t#include <premultiplied_alpha_fragment>\\n\\t#include <dithering_fragment>\\n}\";\n\nvar meshtoon_vert = \"#define TOON\\nvarying vec3 vViewPosition;\\n#ifndef FLAT_SHADED\\n\\tvarying vec3 vNormal;\\n#endif\\n#include <common>\\n#include <uv_pars_vertex>\\n#include <uv2_pars_vertex>\\n#include <displacementmap_pars_vertex>\\n#include <color_pars_vertex>\\n#include <fog_pars_vertex>\\n#include <morphtarget_pars_vertex>\\n#include <skinning_pars_vertex>\\n#include <shadowmap_pars_vertex>\\n#include <logdepthbuf_pars_vertex>\\n#include <clipping_planes_pars_vertex>\\nvoid main() {\\n\\t#include <uv_vertex>\\n\\t#include <uv2_vertex>\\n\\t#include <color_vertex>\\n\\t#include <beginnormal_vertex>\\n\\t#include <morphnormal_vertex>\\n\\t#include <skinbase_vertex>\\n\\t#include <skinnormal_vertex>\\n\\t#include <defaultnormal_vertex>\\n#ifndef FLAT_SHADED\\n\\tvNormal = normalize( transformedNormal );\\n#endif\\n\\t#include <begin_vertex>\\n\\t#include <morphtarget_vertex>\\n\\t#include <skinning_vertex>\\n\\t#include <displacementmap_vertex>\\n\\t#include <project_vertex>\\n\\t#include <logdepthbuf_vertex>\\n\\t#include <clipping_planes_vertex>\\n\\tvViewPosition = - mvPosition.xyz;\\n\\t#include <worldpos_vertex>\\n\\t#include <shadowmap_vertex>\\n\\t#include <fog_vertex>\\n}\";\n\nvar meshphong_frag = \"#define PHONG\\nuniform vec3 diffuse;\\nuniform vec3 emissive;\\nuniform vec3 specular;\\nuniform float shininess;\\nuniform float opacity;\\n#include <common>\\n#include <packing>\\n#include <dithering_pars_fragment>\\n#include <color_pars_fragment>\\n#include <uv_pars_fragment>\\n#include <uv2_pars_fragment>\\n#include <map_pars_fragment>\\n#include <alphamap_pars_fragment>\\n#include <aomap_pars_fragment>\\n#include <lightmap_pars_fragment>\\n#include <emissivemap_pars_fragment>\\n#include <envmap_common_pars_fragment>\\n#include <envmap_pars_fragment>\\n#include <cube_uv_reflection_fragment>\\n#include <fog_pars_fragment>\\n#include <bsdfs>\\n#include <lights_pars_begin>\\n#include <lights_phong_pars_fragment>\\n#include <shadowmap_pars_fragment>\\n#include <bumpmap_pars_fragment>\\n#include <normalmap_pars_fragment>\\n#include <specularmap_pars_fragment>\\n#include <logdepthbuf_pars_fragment>\\n#include <clipping_planes_pars_fragment>\\nvoid main() {\\n\\t#include <clipping_planes_fragment>\\n\\tvec4 diffuseColor = vec4( diffuse, opacity );\\n\\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\\n\\tvec3 totalEmissiveRadiance = emissive;\\n\\t#include <logdepthbuf_fragment>\\n\\t#include <map_fragment>\\n\\t#include <color_fragment>\\n\\t#include <alphamap_fragment>\\n\\t#include <alphatest_fragment>\\n\\t#include <specularmap_fragment>\\n\\t#include <normal_fragment_begin>\\n\\t#include <normal_fragment_maps>\\n\\t#include <emissivemap_fragment>\\n\\t#include <lights_phong_fragment>\\n\\t#include <lights_fragment_begin>\\n\\t#include <lights_fragment_maps>\\n\\t#include <lights_fragment_end>\\n\\t#include <aomap_fragment>\\n\\tvec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + reflectedLight.directSpecular + reflectedLight.indirectSpecular + totalEmissiveRadiance;\\n\\t#include <envmap_fragment>\\n\\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\\n\\t#include <tonemapping_fragment>\\n\\t#include <encodings_fragment>\\n\\t#include <fog_fragment>\\n\\t#include <premultiplied_alpha_fragment>\\n\\t#include <dithering_fragment>\\n}\";\n\nvar meshphong_vert = \"#define PHONG\\nvarying vec3 vViewPosition;\\n#ifndef FLAT_SHADED\\n\\tvarying vec3 vNormal;\\n#endif\\n#include <common>\\n#include <uv_pars_vertex>\\n#include <uv2_pars_vertex>\\n#include <displacementmap_pars_vertex>\\n#include <envmap_pars_vertex>\\n#include <color_pars_vertex>\\n#include <fog_pars_vertex>\\n#include <morphtarget_pars_vertex>\\n#include <skinning_pars_vertex>\\n#include <shadowmap_pars_vertex>\\n#include <logdepthbuf_pars_vertex>\\n#include <clipping_planes_pars_vertex>\\nvoid main() {\\n\\t#include <uv_vertex>\\n\\t#include <uv2_vertex>\\n\\t#include <color_vertex>\\n\\t#include <beginnormal_vertex>\\n\\t#include <morphnormal_vertex>\\n\\t#include <skinbase_vertex>\\n\\t#include <skinnormal_vertex>\\n\\t#include <defaultnormal_vertex>\\n#ifndef FLAT_SHADED\\n\\tvNormal = normalize( transformedNormal );\\n#endif\\n\\t#include <begin_vertex>\\n\\t#include <morphtarget_vertex>\\n\\t#include <skinning_vertex>\\n\\t#include <displacementmap_vertex>\\n\\t#include <project_vertex>\\n\\t#include <logdepthbuf_vertex>\\n\\t#include <clipping_planes_vertex>\\n\\tvViewPosition = - mvPosition.xyz;\\n\\t#include <worldpos_vertex>\\n\\t#include <envmap_vertex>\\n\\t#include <shadowmap_vertex>\\n\\t#include <fog_vertex>\\n}\";\n\nvar meshphysical_frag = \"#define STANDARD\\n#ifdef PHYSICAL\\n\\t#define REFLECTIVITY\\n\\t#define CLEARCOAT\\n\\t#define TRANSPARENCY\\n#endif\\nuniform vec3 diffuse;\\nuniform vec3 emissive;\\nuniform float roughness;\\nuniform float metalness;\\nuniform float opacity;\\n#ifdef TRANSPARENCY\\n\\tuniform float transparency;\\n#endif\\n#ifdef REFLECTIVITY\\n\\tuniform float reflectivity;\\n#endif\\n#ifdef CLEARCOAT\\n\\tuniform float clearcoat;\\n\\tuniform float clearcoatRoughness;\\n#endif\\n#ifdef USE_SHEEN\\n\\tuniform vec3 sheen;\\n#endif\\nvarying vec3 vViewPosition;\\n#ifndef FLAT_SHADED\\n\\tvarying vec3 vNormal;\\n\\t#ifdef USE_TANGENT\\n\\t\\tvarying vec3 vTangent;\\n\\t\\tvarying vec3 vBitangent;\\n\\t#endif\\n#endif\\n#include <common>\\n#include <packing>\\n#include <dithering_pars_fragment>\\n#include <color_pars_fragment>\\n#include <uv_pars_fragment>\\n#include <uv2_pars_fragment>\\n#include <map_pars_fragment>\\n#include <alphamap_pars_fragment>\\n#include <aomap_pars_fragment>\\n#include <lightmap_pars_fragment>\\n#include <emissivemap_pars_fragment>\\n#include <bsdfs>\\n#include <cube_uv_reflection_fragment>\\n#include <envmap_common_pars_fragment>\\n#include <envmap_physical_pars_fragment>\\n#include <fog_pars_fragment>\\n#include <lights_pars_begin>\\n#include <lights_physical_pars_fragment>\\n#include <shadowmap_pars_fragment>\\n#include <bumpmap_pars_fragment>\\n#include <normalmap_pars_fragment>\\n#include <clearcoat_normalmap_pars_fragment>\\n#include <roughnessmap_pars_fragment>\\n#include <metalnessmap_pars_fragment>\\n#include <logdepthbuf_pars_fragment>\\n#include <clipping_planes_pars_fragment>\\nvoid main() {\\n\\t#include <clipping_planes_fragment>\\n\\tvec4 diffuseColor = vec4( diffuse, opacity );\\n\\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\\n\\tvec3 totalEmissiveRadiance = emissive;\\n\\t#include <logdepthbuf_fragment>\\n\\t#include <map_fragment>\\n\\t#include <color_fragment>\\n\\t#include <alphamap_fragment>\\n\\t#include <alphatest_fragment>\\n\\t#include <roughnessmap_fragment>\\n\\t#include <metalnessmap_fragment>\\n\\t#include <normal_fragment_begin>\\n\\t#include <normal_fragment_maps>\\n\\t#include <clearcoat_normal_fragment_begin>\\n\\t#include <clearcoat_normal_fragment_maps>\\n\\t#include <emissivemap_fragment>\\n\\t#include <lights_physical_fragment>\\n\\t#include <lights_fragment_begin>\\n\\t#include <lights_fragment_maps>\\n\\t#include <lights_fragment_end>\\n\\t#include <aomap_fragment>\\n\\tvec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + reflectedLight.directSpecular + reflectedLight.indirectSpecular + totalEmissiveRadiance;\\n\\t#ifdef TRANSPARENCY\\n\\t\\tdiffuseColor.a *= saturate( 1. - transparency + linearToRelativeLuminance( reflectedLight.directSpecular + reflectedLight.indirectSpecular ) );\\n\\t#endif\\n\\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\\n\\t#include <tonemapping_fragment>\\n\\t#include <encodings_fragment>\\n\\t#include <fog_fragment>\\n\\t#include <premultiplied_alpha_fragment>\\n\\t#include <dithering_fragment>\\n}\";\n\nvar meshphysical_vert = \"#define STANDARD\\nvarying vec3 vViewPosition;\\n#ifndef FLAT_SHADED\\n\\tvarying vec3 vNormal;\\n\\t#ifdef USE_TANGENT\\n\\t\\tvarying vec3 vTangent;\\n\\t\\tvarying vec3 vBitangent;\\n\\t#endif\\n#endif\\n#include <common>\\n#include <uv_pars_vertex>\\n#include <uv2_pars_vertex>\\n#include <displacementmap_pars_vertex>\\n#include <color_pars_vertex>\\n#include <fog_pars_vertex>\\n#include <morphtarget_pars_vertex>\\n#include <skinning_pars_vertex>\\n#include <shadowmap_pars_vertex>\\n#include <logdepthbuf_pars_vertex>\\n#include <clipping_planes_pars_vertex>\\nvoid main() {\\n\\t#include <uv_vertex>\\n\\t#include <uv2_vertex>\\n\\t#include <color_vertex>\\n\\t#include <beginnormal_vertex>\\n\\t#include <morphnormal_vertex>\\n\\t#include <skinbase_vertex>\\n\\t#include <skinnormal_vertex>\\n\\t#include <defaultnormal_vertex>\\n#ifndef FLAT_SHADED\\n\\tvNormal = normalize( transformedNormal );\\n\\t#ifdef USE_TANGENT\\n\\t\\tvTangent = normalize( transformedTangent );\\n\\t\\tvBitangent = normalize( cross( vNormal, vTangent ) * tangent.w );\\n\\t#endif\\n#endif\\n\\t#include <begin_vertex>\\n\\t#include <morphtarget_vertex>\\n\\t#include <skinning_vertex>\\n\\t#include <displacementmap_vertex>\\n\\t#include <project_vertex>\\n\\t#include <logdepthbuf_vertex>\\n\\t#include <clipping_planes_vertex>\\n\\tvViewPosition = - mvPosition.xyz;\\n\\t#include <worldpos_vertex>\\n\\t#include <shadowmap_vertex>\\n\\t#include <fog_vertex>\\n}\";\n\nvar normal_frag = \"#define NORMAL\\nuniform float opacity;\\n#if defined( FLAT_SHADED ) || defined( USE_BUMPMAP ) || defined( TANGENTSPACE_NORMALMAP )\\n\\tvarying vec3 vViewPosition;\\n#endif\\n#ifndef FLAT_SHADED\\n\\tvarying vec3 vNormal;\\n\\t#ifdef USE_TANGENT\\n\\t\\tvarying vec3 vTangent;\\n\\t\\tvarying vec3 vBitangent;\\n\\t#endif\\n#endif\\n#include <packing>\\n#include <uv_pars_fragment>\\n#include <bumpmap_pars_fragment>\\n#include <normalmap_pars_fragment>\\n#include <logdepthbuf_pars_fragment>\\n#include <clipping_planes_pars_fragment>\\nvoid main() {\\n\\t#include <clipping_planes_fragment>\\n\\t#include <logdepthbuf_fragment>\\n\\t#include <normal_fragment_begin>\\n\\t#include <normal_fragment_maps>\\n\\tgl_FragColor = vec4( packNormalToRGB( normal ), opacity );\\n}\";\n\nvar normal_vert = \"#define NORMAL\\n#if defined( FLAT_SHADED ) || defined( USE_BUMPMAP ) || defined( TANGENTSPACE_NORMALMAP )\\n\\tvarying vec3 vViewPosition;\\n#endif\\n#ifndef FLAT_SHADED\\n\\tvarying vec3 vNormal;\\n\\t#ifdef USE_TANGENT\\n\\t\\tvarying vec3 vTangent;\\n\\t\\tvarying vec3 vBitangent;\\n\\t#endif\\n#endif\\n#include <common>\\n#include <uv_pars_vertex>\\n#include <displacementmap_pars_vertex>\\n#include <morphtarget_pars_vertex>\\n#include <skinning_pars_vertex>\\n#include <logdepthbuf_pars_vertex>\\n#include <clipping_planes_pars_vertex>\\nvoid main() {\\n\\t#include <uv_vertex>\\n\\t#include <beginnormal_vertex>\\n\\t#include <morphnormal_vertex>\\n\\t#include <skinbase_vertex>\\n\\t#include <skinnormal_vertex>\\n\\t#include <defaultnormal_vertex>\\n#ifndef FLAT_SHADED\\n\\tvNormal = normalize( transformedNormal );\\n\\t#ifdef USE_TANGENT\\n\\t\\tvTangent = normalize( transformedTangent );\\n\\t\\tvBitangent = normalize( cross( vNormal, vTangent ) * tangent.w );\\n\\t#endif\\n#endif\\n\\t#include <begin_vertex>\\n\\t#include <morphtarget_vertex>\\n\\t#include <skinning_vertex>\\n\\t#include <displacementmap_vertex>\\n\\t#include <project_vertex>\\n\\t#include <logdepthbuf_vertex>\\n\\t#include <clipping_planes_vertex>\\n#if defined( FLAT_SHADED ) || defined( USE_BUMPMAP ) || defined( TANGENTSPACE_NORMALMAP )\\n\\tvViewPosition = - mvPosition.xyz;\\n#endif\\n}\";\n\nvar points_frag = \"uniform vec3 diffuse;\\nuniform float opacity;\\n#include <common>\\n#include <color_pars_fragment>\\n#include <map_particle_pars_fragment>\\n#include <fog_pars_fragment>\\n#include <logdepthbuf_pars_fragment>\\n#include <clipping_planes_pars_fragment>\\nvoid main() {\\n\\t#include <clipping_planes_fragment>\\n\\tvec3 outgoingLight = vec3( 0.0 );\\n\\tvec4 diffuseColor = vec4( diffuse, opacity );\\n\\t#include <logdepthbuf_fragment>\\n\\t#include <map_particle_fragment>\\n\\t#include <color_fragment>\\n\\t#include <alphatest_fragment>\\n\\toutgoingLight = diffuseColor.rgb;\\n\\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\\n\\t#include <tonemapping_fragment>\\n\\t#include <encodings_fragment>\\n\\t#include <fog_fragment>\\n\\t#include <premultiplied_alpha_fragment>\\n}\";\n\nvar points_vert = \"uniform float size;\\nuniform float scale;\\n#include <common>\\n#include <color_pars_vertex>\\n#include <fog_pars_vertex>\\n#include <morphtarget_pars_vertex>\\n#include <logdepthbuf_pars_vertex>\\n#include <clipping_planes_pars_vertex>\\nvoid main() {\\n\\t#include <color_vertex>\\n\\t#include <begin_vertex>\\n\\t#include <morphtarget_vertex>\\n\\t#include <project_vertex>\\n\\tgl_PointSize = size;\\n\\t#ifdef USE_SIZEATTENUATION\\n\\t\\tbool isPerspective = isPerspectiveMatrix( projectionMatrix );\\n\\t\\tif ( isPerspective ) gl_PointSize *= ( scale / - mvPosition.z );\\n\\t#endif\\n\\t#include <logdepthbuf_vertex>\\n\\t#include <clipping_planes_vertex>\\n\\t#include <worldpos_vertex>\\n\\t#include <fog_vertex>\\n}\";\n\nvar shadow_frag = \"uniform vec3 color;\\nuniform float opacity;\\n#include <common>\\n#include <packing>\\n#include <fog_pars_fragment>\\n#include <bsdfs>\\n#include <lights_pars_begin>\\n#include <shadowmap_pars_fragment>\\n#include <shadowmask_pars_fragment>\\nvoid main() {\\n\\tgl_FragColor = vec4( color, opacity * ( 1.0 - getShadowMask() ) );\\n\\t#include <tonemapping_fragment>\\n\\t#include <encodings_fragment>\\n\\t#include <fog_fragment>\\n}\";\n\nvar shadow_vert = \"#include <fog_pars_vertex>\\n#include <shadowmap_pars_vertex>\\nvoid main() {\\n\\t#include <begin_vertex>\\n\\t#include <project_vertex>\\n\\t#include <worldpos_vertex>\\n\\t#include <shadowmap_vertex>\\n\\t#include <fog_vertex>\\n}\";\n\nvar sprite_frag = \"uniform vec3 diffuse;\\nuniform float opacity;\\n#include <common>\\n#include <uv_pars_fragment>\\n#include <map_pars_fragment>\\n#include <alphamap_pars_fragment>\\n#include <fog_pars_fragment>\\n#include <logdepthbuf_pars_fragment>\\n#include <clipping_planes_pars_fragment>\\nvoid main() {\\n\\t#include <clipping_planes_fragment>\\n\\tvec3 outgoingLight = vec3( 0.0 );\\n\\tvec4 diffuseColor = vec4( diffuse, opacity );\\n\\t#include <logdepthbuf_fragment>\\n\\t#include <map_fragment>\\n\\t#include <alphamap_fragment>\\n\\t#include <alphatest_fragment>\\n\\toutgoingLight = diffuseColor.rgb;\\n\\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\\n\\t#include <tonemapping_fragment>\\n\\t#include <encodings_fragment>\\n\\t#include <fog_fragment>\\n}\";\n\nvar sprite_vert = \"uniform float rotation;\\nuniform vec2 center;\\n#include <common>\\n#include <uv_pars_vertex>\\n#include <fog_pars_vertex>\\n#include <logdepthbuf_pars_vertex>\\n#include <clipping_planes_pars_vertex>\\nvoid main() {\\n\\t#include <uv_vertex>\\n\\tvec4 mvPosition = modelViewMatrix * vec4( 0.0, 0.0, 0.0, 1.0 );\\n\\tvec2 scale;\\n\\tscale.x = length( vec3( modelMatrix[ 0 ].x, modelMatrix[ 0 ].y, modelMatrix[ 0 ].z ) );\\n\\tscale.y = length( vec3( modelMatrix[ 1 ].x, modelMatrix[ 1 ].y, modelMatrix[ 1 ].z ) );\\n\\t#ifndef USE_SIZEATTENUATION\\n\\t\\tbool isPerspective = isPerspectiveMatrix( projectionMatrix );\\n\\t\\tif ( isPerspective ) scale *= - mvPosition.z;\\n\\t#endif\\n\\tvec2 alignedPosition = ( position.xy - ( center - vec2( 0.5 ) ) ) * scale;\\n\\tvec2 rotatedPosition;\\n\\trotatedPosition.x = cos( rotation ) * alignedPosition.x - sin( rotation ) * alignedPosition.y;\\n\\trotatedPosition.y = sin( rotation ) * alignedPosition.x + cos( rotation ) * alignedPosition.y;\\n\\tmvPosition.xy += rotatedPosition;\\n\\tgl_Position = projectionMatrix * mvPosition;\\n\\t#include <logdepthbuf_vertex>\\n\\t#include <clipping_planes_vertex>\\n\\t#include <fog_vertex>\\n}\";\n\nvar ShaderChunk = {\n\talphamap_fragment: alphamap_fragment,\n\talphamap_pars_fragment: alphamap_pars_fragment,\n\talphatest_fragment: alphatest_fragment,\n\taomap_fragment: aomap_fragment,\n\taomap_pars_fragment: aomap_pars_fragment,\n\tbegin_vertex: begin_vertex,\n\tbeginnormal_vertex: beginnormal_vertex,\n\tbsdfs: bsdfs,\n\tbumpmap_pars_fragment: bumpmap_pars_fragment,\n\tclipping_planes_fragment: clipping_planes_fragment,\n\tclipping_planes_pars_fragment: clipping_planes_pars_fragment,\n\tclipping_planes_pars_vertex: clipping_planes_pars_vertex,\n\tclipping_planes_vertex: clipping_planes_vertex,\n\tcolor_fragment: color_fragment,\n\tcolor_pars_fragment: color_pars_fragment,\n\tcolor_pars_vertex: color_pars_vertex,\n\tcolor_vertex: color_vertex,\n\tcommon: common,\n\tcube_uv_reflection_fragment: cube_uv_reflection_fragment,\n\tdefaultnormal_vertex: defaultnormal_vertex,\n\tdisplacementmap_pars_vertex: displacementmap_pars_vertex,\n\tdisplacementmap_vertex: displacementmap_vertex,\n\temissivemap_fragment: emissivemap_fragment,\n\temissivemap_pars_fragment: emissivemap_pars_fragment,\n\tencodings_fragment: encodings_fragment,\n\tencodings_pars_fragment: encodings_pars_fragment,\n\tenvmap_fragment: envmap_fragment,\n\tenvmap_common_pars_fragment: envmap_common_pars_fragment,\n\tenvmap_pars_fragment: envmap_pars_fragment,\n\tenvmap_pars_vertex: envmap_pars_vertex,\n\tenvmap_physical_pars_fragment: envmap_physical_pars_fragment,\n\tenvmap_vertex: envmap_vertex,\n\tfog_vertex: fog_vertex,\n\tfog_pars_vertex: fog_pars_vertex,\n\tfog_fragment: fog_fragment,\n\tfog_pars_fragment: fog_pars_fragment,\n\tgradientmap_pars_fragment: gradientmap_pars_fragment,\n\tlightmap_fragment: lightmap_fragment,\n\tlightmap_pars_fragment: lightmap_pars_fragment,\n\tlights_lambert_vertex: lights_lambert_vertex,\n\tlights_pars_begin: lights_pars_begin,\n\tlights_toon_fragment: lights_toon_fragment,\n\tlights_toon_pars_fragment: lights_toon_pars_fragment,\n\tlights_phong_fragment: lights_phong_fragment,\n\tlights_phong_pars_fragment: lights_phong_pars_fragment,\n\tlights_physical_fragment: lights_physical_fragment,\n\tlights_physical_pars_fragment: lights_physical_pars_fragment,\n\tlights_fragment_begin: lights_fragment_begin,\n\tlights_fragment_maps: lights_fragment_maps,\n\tlights_fragment_end: lights_fragment_end,\n\tlogdepthbuf_fragment: logdepthbuf_fragment,\n\tlogdepthbuf_pars_fragment: logdepthbuf_pars_fragment,\n\tlogdepthbuf_pars_vertex: logdepthbuf_pars_vertex,\n\tlogdepthbuf_vertex: logdepthbuf_vertex,\n\tmap_fragment: map_fragment,\n\tmap_pars_fragment: map_pars_fragment,\n\tmap_particle_fragment: map_particle_fragment,\n\tmap_particle_pars_fragment: map_particle_pars_fragment,\n\tmetalnessmap_fragment: metalnessmap_fragment,\n\tmetalnessmap_pars_fragment: metalnessmap_pars_fragment,\n\tmorphnormal_vertex: morphnormal_vertex,\n\tmorphtarget_pars_vertex: morphtarget_pars_vertex,\n\tmorphtarget_vertex: morphtarget_vertex,\n\tnormal_fragment_begin: normal_fragment_begin,\n\tnormal_fragment_maps: normal_fragment_maps,\n\tnormalmap_pars_fragment: normalmap_pars_fragment,\n\tclearcoat_normal_fragment_begin: clearcoat_normal_fragment_begin,\n\tclearcoat_normal_fragment_maps: clearcoat_normal_fragment_maps,\n\tclearcoat_normalmap_pars_fragment: clearcoat_normalmap_pars_fragment,\n\tpacking: packing,\n\tpremultiplied_alpha_fragment: premultiplied_alpha_fragment,\n\tproject_vertex: project_vertex,\n\tdithering_fragment: dithering_fragment,\n\tdithering_pars_fragment: dithering_pars_fragment,\n\troughnessmap_fragment: roughnessmap_fragment,\n\troughnessmap_pars_fragment: roughnessmap_pars_fragment,\n\tshadowmap_pars_fragment: shadowmap_pars_fragment,\n\tshadowmap_pars_vertex: shadowmap_pars_vertex,\n\tshadowmap_vertex: shadowmap_vertex,\n\tshadowmask_pars_fragment: shadowmask_pars_fragment,\n\tskinbase_vertex: skinbase_vertex,\n\tskinning_pars_vertex: skinning_pars_vertex,\n\tskinning_vertex: skinning_vertex,\n\tskinnormal_vertex: skinnormal_vertex,\n\tspecularmap_fragment: specularmap_fragment,\n\tspecularmap_pars_fragment: specularmap_pars_fragment,\n\ttonemapping_fragment: tonemapping_fragment,\n\ttonemapping_pars_fragment: tonemapping_pars_fragment,\n\tuv_pars_fragment: uv_pars_fragment,\n\tuv_pars_vertex: uv_pars_vertex,\n\tuv_vertex: uv_vertex,\n\tuv2_pars_fragment: uv2_pars_fragment,\n\tuv2_pars_vertex: uv2_pars_vertex,\n\tuv2_vertex: uv2_vertex,\n\tworldpos_vertex: worldpos_vertex,\n\n\tbackground_frag: background_frag,\n\tbackground_vert: background_vert,\n\tcube_frag: cube_frag,\n\tcube_vert: cube_vert,\n\tdepth_frag: depth_frag,\n\tdepth_vert: depth_vert,\n\tdistanceRGBA_frag: distanceRGBA_frag,\n\tdistanceRGBA_vert: distanceRGBA_vert,\n\tequirect_frag: equirect_frag,\n\tequirect_vert: equirect_vert,\n\tlinedashed_frag: linedashed_frag,\n\tlinedashed_vert: linedashed_vert,\n\tmeshbasic_frag: meshbasic_frag,\n\tmeshbasic_vert: meshbasic_vert,\n\tmeshlambert_frag: meshlambert_frag,\n\tmeshlambert_vert: meshlambert_vert,\n\tmeshmatcap_frag: meshmatcap_frag,\n\tmeshmatcap_vert: meshmatcap_vert,\n\tmeshtoon_frag: meshtoon_frag,\n\tmeshtoon_vert: meshtoon_vert,\n\tmeshphong_frag: meshphong_frag,\n\tmeshphong_vert: meshphong_vert,\n\tmeshphysical_frag: meshphysical_frag,\n\tmeshphysical_vert: meshphysical_vert,\n\tnormal_frag: normal_frag,\n\tnormal_vert: normal_vert,\n\tpoints_frag: points_frag,\n\tpoints_vert: points_vert,\n\tshadow_frag: shadow_frag,\n\tshadow_vert: shadow_vert,\n\tsprite_frag: sprite_frag,\n\tsprite_vert: sprite_vert\n};\n\n/**\n * @author alteredq / http://alteredqualia.com/\n * @author mrdoob / http://mrdoob.com/\n * @author mikael emtinger / http://gomo.se/\n */\n\nvar ShaderLib = {\n\n\tbasic: {\n\n\t\tuniforms: mergeUniforms( [\n\t\t\tUniformsLib.common,\n\t\t\tUniformsLib.specularmap,\n\t\t\tUniformsLib.envmap,\n\t\t\tUniformsLib.aomap,\n\t\t\tUniformsLib.lightmap,\n\t\t\tUniformsLib.fog\n\t\t] ),\n\n\t\tvertexShader: ShaderChunk.meshbasic_vert,\n\t\tfragmentShader: ShaderChunk.meshbasic_frag\n\n\t},\n\n\tlambert: {\n\n\t\tuniforms: mergeUniforms( [\n\t\t\tUniformsLib.common,\n\t\t\tUniformsLib.specularmap,\n\t\t\tUniformsLib.envmap,\n\t\t\tUniformsLib.aomap,\n\t\t\tUniformsLib.lightmap,\n\t\t\tUniformsLib.emissivemap,\n\t\t\tUniformsLib.fog,\n\t\t\tUniformsLib.lights,\n\t\t\t{\n\t\t\t\temissive: { value: new Color( 0x000000 ) }\n\t\t\t}\n\t\t] ),\n\n\t\tvertexShader: ShaderChunk.meshlambert_vert,\n\t\tfragmentShader: ShaderChunk.meshlambert_frag\n\n\t},\n\n\tphong: {\n\n\t\tuniforms: mergeUniforms( [\n\t\t\tUniformsLib.common,\n\t\t\tUniformsLib.specularmap,\n\t\t\tUniformsLib.envmap,\n\t\t\tUniformsLib.aomap,\n\t\t\tUniformsLib.lightmap,\n\t\t\tUniformsLib.emissivemap,\n\t\t\tUniformsLib.bumpmap,\n\t\t\tUniformsLib.normalmap,\n\t\t\tUniformsLib.displacementmap,\n\t\t\tUniformsLib.fog,\n\t\t\tUniformsLib.lights,\n\t\t\t{\n\t\t\t\temissive: { value: new Color( 0x000000 ) },\n\t\t\t\tspecular: { value: new Color( 0x111111 ) },\n\t\t\t\tshininess: { value: 30 }\n\t\t\t}\n\t\t] ),\n\n\t\tvertexShader: ShaderChunk.meshphong_vert,\n\t\tfragmentShader: ShaderChunk.meshphong_frag\n\n\t},\n\n\tstandard: {\n\n\t\tuniforms: mergeUniforms( [\n\t\t\tUniformsLib.common,\n\t\t\tUniformsLib.envmap,\n\t\t\tUniformsLib.aomap,\n\t\t\tUniformsLib.lightmap,\n\t\t\tUniformsLib.emissivemap,\n\t\t\tUniformsLib.bumpmap,\n\t\t\tUniformsLib.normalmap,\n\t\t\tUniformsLib.displacementmap,\n\t\t\tUniformsLib.roughnessmap,\n\t\t\tUniformsLib.metalnessmap,\n\t\t\tUniformsLib.fog,\n\t\t\tUniformsLib.lights,\n\t\t\t{\n\t\t\t\temissive: { value: new Color( 0x000000 ) },\n\t\t\t\troughness: { value: 0.5 },\n\t\t\t\tmetalness: { value: 0.5 },\n\t\t\t\tenvMapIntensity: { value: 1 } // temporary\n\t\t\t}\n\t\t] ),\n\n\t\tvertexShader: ShaderChunk.meshphysical_vert,\n\t\tfragmentShader: ShaderChunk.meshphysical_frag\n\n\t},\n\n\ttoon: {\n\n\t\tuniforms: mergeUniforms( [\n\t\t\tUniformsLib.common,\n\t\t\tUniformsLib.specularmap,\n\t\t\tUniformsLib.aomap,\n\t\t\tUniformsLib.lightmap,\n\t\t\tUniformsLib.emissivemap,\n\t\t\tUniformsLib.bumpmap,\n\t\t\tUniformsLib.normalmap,\n\t\t\tUniformsLib.displacementmap,\n\t\t\tUniformsLib.gradientmap,\n\t\t\tUniformsLib.fog,\n\t\t\tUniformsLib.lights,\n\t\t\t{\n\t\t\t\temissive: { value: new Color( 0x000000 ) },\n\t\t\t\tspecular: { value: new Color( 0x111111 ) },\n\t\t\t\tshininess: { value: 30 }\n\t\t\t}\n\t\t] ),\n\n\t\tvertexShader: ShaderChunk.meshtoon_vert,\n\t\tfragmentShader: ShaderChunk.meshtoon_frag\n\n\t},\n\n\tmatcap: {\n\n\t\tuniforms: mergeUniforms( [\n\t\t\tUniformsLib.common,\n\t\t\tUniformsLib.bumpmap,\n\t\t\tUniformsLib.normalmap,\n\t\t\tUniformsLib.displacementmap,\n\t\t\tUniformsLib.fog,\n\t\t\t{\n\t\t\t\tmatcap: { value: null }\n\t\t\t}\n\t\t] ),\n\n\t\tvertexShader: ShaderChunk.meshmatcap_vert,\n\t\tfragmentShader: ShaderChunk.meshmatcap_frag\n\n\t},\n\n\tpoints: {\n\n\t\tuniforms: mergeUniforms( [\n\t\t\tUniformsLib.points,\n\t\t\tUniformsLib.fog\n\t\t] ),\n\n\t\tvertexShader: ShaderChunk.points_vert,\n\t\tfragmentShader: ShaderChunk.points_frag\n\n\t},\n\n\tdashed: {\n\n\t\tuniforms: mergeUniforms( [\n\t\t\tUniformsLib.common,\n\t\t\tUniformsLib.fog,\n\t\t\t{\n\t\t\t\tscale: { value: 1 },\n\t\t\t\tdashSize: { value: 1 },\n\t\t\t\ttotalSize: { value: 2 }\n\t\t\t}\n\t\t] ),\n\n\t\tvertexShader: ShaderChunk.linedashed_vert,\n\t\tfragmentShader: ShaderChunk.linedashed_frag\n\n\t},\n\n\tdepth: {\n\n\t\tuniforms: mergeUniforms( [\n\t\t\tUniformsLib.common,\n\t\t\tUniformsLib.displacementmap\n\t\t] ),\n\n\t\tvertexShader: ShaderChunk.depth_vert,\n\t\tfragmentShader: ShaderChunk.depth_frag\n\n\t},\n\n\tnormal: {\n\n\t\tuniforms: mergeUniforms( [\n\t\t\tUniformsLib.common,\n\t\t\tUniformsLib.bumpmap,\n\t\t\tUniformsLib.normalmap,\n\t\t\tUniformsLib.displacementmap,\n\t\t\t{\n\t\t\t\topacity: { value: 1.0 }\n\t\t\t}\n\t\t] ),\n\n\t\tvertexShader: ShaderChunk.normal_vert,\n\t\tfragmentShader: ShaderChunk.normal_frag\n\n\t},\n\n\tsprite: {\n\n\t\tuniforms: mergeUniforms( [\n\t\t\tUniformsLib.sprite,\n\t\t\tUniformsLib.fog\n\t\t] ),\n\n\t\tvertexShader: ShaderChunk.sprite_vert,\n\t\tfragmentShader: ShaderChunk.sprite_frag\n\n\t},\n\n\tbackground: {\n\n\t\tuniforms: {\n\t\t\tuvTransform: { value: new Matrix3() },\n\t\t\tt2D: { value: null },\n\t\t},\n\n\t\tvertexShader: ShaderChunk.background_vert,\n\t\tfragmentShader: ShaderChunk.background_frag\n\n\t},\n\t/* -------------------------------------------------------------------------\n\t//\tCube map shader\n\t ------------------------------------------------------------------------- */\n\n\tcube: {\n\n\t\tuniforms: mergeUniforms( [\n\t\t\tUniformsLib.envmap,\n\t\t\t{\n\t\t\t\topacity: { value: 1.0 }\n\t\t\t}\n\t\t] ),\n\n\t\tvertexShader: ShaderChunk.cube_vert,\n\t\tfragmentShader: ShaderChunk.cube_frag\n\n\t},\n\n\tequirect: {\n\n\t\tuniforms: {\n\t\t\ttEquirect: { value: null },\n\t\t},\n\n\t\tvertexShader: ShaderChunk.equirect_vert,\n\t\tfragmentShader: ShaderChunk.equirect_frag\n\n\t},\n\n\tdistanceRGBA: {\n\n\t\tuniforms: mergeUniforms( [\n\t\t\tUniformsLib.common,\n\t\t\tUniformsLib.displacementmap,\n\t\t\t{\n\t\t\t\treferencePosition: { value: new Vector3() },\n\t\t\t\tnearDistance: { value: 1 },\n\t\t\t\tfarDistance: { value: 1000 }\n\t\t\t}\n\t\t] ),\n\n\t\tvertexShader: ShaderChunk.distanceRGBA_vert,\n\t\tfragmentShader: ShaderChunk.distanceRGBA_frag\n\n\t},\n\n\tshadow: {\n\n\t\tuniforms: mergeUniforms( [\n\t\t\tUniformsLib.lights,\n\t\t\tUniformsLib.fog,\n\t\t\t{\n\t\t\t\tcolor: { value: new Color( 0x00000 ) },\n\t\t\t\topacity: { value: 1.0 }\n\t\t\t},\n\t\t] ),\n\n\t\tvertexShader: ShaderChunk.shadow_vert,\n\t\tfragmentShader: ShaderChunk.shadow_frag\n\n\t}\n\n};\n\nShaderLib.physical = {\n\n\tuniforms: mergeUniforms( [\n\t\tShaderLib.standard.uniforms,\n\t\t{\n\t\t\ttransparency: { value: 0 },\n\t\t\tclearcoat: { value: 0 },\n\t\t\tclearcoatRoughness: { value: 0 },\n\t\t\tsheen: { value: new Color( 0x000000 ) },\n\t\t\tclearcoatNormalScale: { value: new Vector2( 1, 1 ) },\n\t\t\tclearcoatNormalMap: { value: null },\n\t\t}\n\t] ),\n\n\tvertexShader: ShaderChunk.meshphysical_vert,\n\tfragmentShader: ShaderChunk.meshphysical_frag\n\n};\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction WebGLBackground( renderer, state, objects, premultipliedAlpha ) {\n\n\tvar clearColor = new Color( 0x000000 );\n\tvar clearAlpha = 0;\n\n\tvar planeMesh;\n\tvar boxMesh;\n\n\tvar currentBackground = null;\n\tvar currentBackgroundVersion = 0;\n\tvar currentTonemapping = null;\n\n\tfunction render( renderList, scene, camera, forceClear ) {\n\n\t\tvar background = scene.background;\n\n\t\t// Ignore background in AR\n\t\t// TODO: Reconsider this.\n\n\t\tvar xr = renderer.xr;\n\t\tvar session = xr.getSession && xr.getSession();\n\n\t\tif ( session && session.environmentBlendMode === 'additive' ) {\n\n\t\t\tbackground = null;\n\n\t\t}\n\n\t\tif ( background === null ) {\n\n\t\t\tsetClear( clearColor, clearAlpha );\n\n\t\t} else if ( background && background.isColor ) {\n\n\t\t\tsetClear( background, 1 );\n\t\t\tforceClear = true;\n\n\t\t}\n\n\t\tif ( renderer.autoClear || forceClear ) {\n\n\t\t\trenderer.clear( renderer.autoClearColor, renderer.autoClearDepth, renderer.autoClearStencil );\n\n\t\t}\n\n\t\tif ( background && ( background.isCubeTexture || background.isWebGLCubeRenderTarget || background.mapping === CubeUVReflectionMapping ) ) {\n\n\t\t\tif ( boxMesh === undefined ) {\n\n\t\t\t\tboxMesh = new Mesh(\n\t\t\t\t\tnew BoxBufferGeometry( 1, 1, 1 ),\n\t\t\t\t\tnew ShaderMaterial( {\n\t\t\t\t\t\ttype: 'BackgroundCubeMaterial',\n\t\t\t\t\t\tuniforms: cloneUniforms( ShaderLib.cube.uniforms ),\n\t\t\t\t\t\tvertexShader: ShaderLib.cube.vertexShader,\n\t\t\t\t\t\tfragmentShader: ShaderLib.cube.fragmentShader,\n\t\t\t\t\t\tside: BackSide,\n\t\t\t\t\t\tdepthTest: false,\n\t\t\t\t\t\tdepthWrite: false,\n\t\t\t\t\t\tfog: false\n\t\t\t\t\t} )\n\t\t\t\t);\n\n\t\t\t\tboxMesh.geometry.deleteAttribute( 'normal' );\n\t\t\t\tboxMesh.geometry.deleteAttribute( 'uv' );\n\n\t\t\t\tboxMesh.onBeforeRender = function ( renderer, scene, camera ) {\n\n\t\t\t\t\tthis.matrixWorld.copyPosition( camera.matrixWorld );\n\n\t\t\t\t};\n\n\t\t\t\t// enable code injection for non-built-in material\n\t\t\t\tObject.defineProperty( boxMesh.material, 'envMap', {\n\n\t\t\t\t\tget: function () {\n\n\t\t\t\t\t\treturn this.uniforms.envMap.value;\n\n\t\t\t\t\t}\n\n\t\t\t\t} );\n\n\t\t\t\tobjects.update( boxMesh );\n\n\t\t\t}\n\n\t\t\tvar texture = background.isWebGLCubeRenderTarget ? background.texture : background;\n\n\t\t\tboxMesh.material.uniforms.envMap.value = texture;\n\t\t\tboxMesh.material.uniforms.flipEnvMap.value = texture.isCubeTexture ? - 1 : 1;\n\n\t\t\tif ( currentBackground !== background ||\n\t\t\t\tcurrentBackgroundVersion !== texture.version ||\n\t\t\t\tcurrentTonemapping !== renderer.toneMapping ) {\n\n\t\t\t\tboxMesh.material.needsUpdate = true;\n\n\t\t\t\tcurrentBackground = background;\n\t\t\t\tcurrentBackgroundVersion = texture.version;\n\t\t\t\tcurrentTonemapping = renderer.toneMapping;\n\n\t\t\t}\n\n\t\t\t// push to the pre-sorted opaque render list\n\t\t\trenderList.unshift( boxMesh, boxMesh.geometry, boxMesh.material, 0, 0, null );\n\n\t\t} else if ( background && background.isTexture ) {\n\n\t\t\tif ( planeMesh === undefined ) {\n\n\t\t\t\tplaneMesh = new Mesh(\n\t\t\t\t\tnew PlaneBufferGeometry( 2, 2 ),\n\t\t\t\t\tnew ShaderMaterial( {\n\t\t\t\t\t\ttype: 'BackgroundMaterial',\n\t\t\t\t\t\tuniforms: cloneUniforms( ShaderLib.background.uniforms ),\n\t\t\t\t\t\tvertexShader: ShaderLib.background.vertexShader,\n\t\t\t\t\t\tfragmentShader: ShaderLib.background.fragmentShader,\n\t\t\t\t\t\tside: FrontSide,\n\t\t\t\t\t\tdepthTest: false,\n\t\t\t\t\t\tdepthWrite: false,\n\t\t\t\t\t\tfog: false\n\t\t\t\t\t} )\n\t\t\t\t);\n\n\t\t\t\tplaneMesh.geometry.deleteAttribute( 'normal' );\n\n\t\t\t\t// enable code injection for non-built-in material\n\t\t\t\tObject.defineProperty( planeMesh.material, 'map', {\n\n\t\t\t\t\tget: function () {\n\n\t\t\t\t\t\treturn this.uniforms.t2D.value;\n\n\t\t\t\t\t}\n\n\t\t\t\t} );\n\n\t\t\t\tobjects.update( planeMesh );\n\n\t\t\t}\n\n\t\t\tplaneMesh.material.uniforms.t2D.value = background;\n\n\t\t\tif ( background.matrixAutoUpdate === true ) {\n\n\t\t\t\tbackground.updateMatrix();\n\n\t\t\t}\n\n\t\t\tplaneMesh.material.uniforms.uvTransform.value.copy( background.matrix );\n\n\t\t\tif ( currentBackground !== background ||\n\t\t\t\tcurrentBackgroundVersion !== background.version ||\n\t\t\t\tcurrentTonemapping !== renderer.toneMapping ) {\n\n\t\t\t\tplaneMesh.material.needsUpdate = true;\n\n\t\t\t\tcurrentBackground = background;\n\t\t\t\tcurrentBackgroundVersion = background.version;\n\t\t\t\tcurrentTonemapping = renderer.toneMapping;\n\n\t\t\t}\n\n\n\t\t\t// push to the pre-sorted opaque render list\n\t\t\trenderList.unshift( planeMesh, planeMesh.geometry, planeMesh.material, 0, 0, null );\n\n\t\t}\n\n\t}\n\n\tfunction setClear( color, alpha ) {\n\n\t\tstate.buffers.color.setClear( color.r, color.g, color.b, alpha, premultipliedAlpha );\n\n\t}\n\n\treturn {\n\n\t\tgetClearColor: function () {\n\n\t\t\treturn clearColor;\n\n\t\t},\n\t\tsetClearColor: function ( color, alpha ) {\n\n\t\t\tclearColor.set( color );\n\t\t\tclearAlpha = alpha !== undefined ? alpha : 1;\n\t\t\tsetClear( clearColor, clearAlpha );\n\n\t\t},\n\t\tgetClearAlpha: function () {\n\n\t\t\treturn clearAlpha;\n\n\t\t},\n\t\tsetClearAlpha: function ( alpha ) {\n\n\t\t\tclearAlpha = alpha;\n\t\t\tsetClear( clearColor, clearAlpha );\n\n\t\t},\n\t\trender: render\n\n\t};\n\n}\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction WebGLBufferRenderer( gl, extensions, info, capabilities ) {\n\n\tvar isWebGL2 = capabilities.isWebGL2;\n\n\tvar mode;\n\n\tfunction setMode( value ) {\n\n\t\tmode = value;\n\n\t}\n\n\tfunction render( start, count ) {\n\n\t\tgl.drawArrays( mode, start, count );\n\n\t\tinfo.update( count, mode );\n\n\t}\n\n\tfunction renderInstances( geometry, start, count, primcount ) {\n\n\t\tif ( primcount === 0 ) return;\n\n\t\tvar extension, methodName;\n\n\t\tif ( isWebGL2 ) {\n\n\t\t\textension = gl;\n\t\t\tmethodName = 'drawArraysInstanced';\n\n\t\t} else {\n\n\t\t\textension = extensions.get( 'ANGLE_instanced_arrays' );\n\t\t\tmethodName = 'drawArraysInstancedANGLE';\n\n\t\t\tif ( extension === null ) {\n\n\t\t\t\tconsole.error( 'THREE.WebGLBufferRenderer: using THREE.InstancedBufferGeometry but hardware does not support extension ANGLE_instanced_arrays.' );\n\t\t\t\treturn;\n\n\t\t\t}\n\n\t\t}\n\n\t\textension[ methodName ]( mode, start, count, primcount );\n\n\t\tinfo.update( count, mode, primcount );\n\n\t}\n\n\t//\n\n\tthis.setMode = setMode;\n\tthis.render = render;\n\tthis.renderInstances = renderInstances;\n\n}\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction WebGLCapabilities( gl, extensions, parameters ) {\n\n\tvar maxAnisotropy;\n\n\tfunction getMaxAnisotropy() {\n\n\t\tif ( maxAnisotropy !== undefined ) return maxAnisotropy;\n\n\t\tvar extension = extensions.get( 'EXT_texture_filter_anisotropic' );\n\n\t\tif ( extension !== null ) {\n\n\t\t\tmaxAnisotropy = gl.getParameter( extension.MAX_TEXTURE_MAX_ANISOTROPY_EXT );\n\n\t\t} else {\n\n\t\t\tmaxAnisotropy = 0;\n\n\t\t}\n\n\t\treturn maxAnisotropy;\n\n\t}\n\n\tfunction getMaxPrecision( precision ) {\n\n\t\tif ( precision === 'highp' ) {\n\n\t\t\tif ( gl.getShaderPrecisionFormat( 35633, 36338 ).precision > 0 &&\n\t\t\t\tgl.getShaderPrecisionFormat( 35632, 36338 ).precision > 0 ) {\n\n\t\t\t\treturn 'highp';\n\n\t\t\t}\n\n\t\t\tprecision = 'mediump';\n\n\t\t}\n\n\t\tif ( precision === 'mediump' ) {\n\n\t\t\tif ( gl.getShaderPrecisionFormat( 35633, 36337 ).precision > 0 &&\n\t\t\t\tgl.getShaderPrecisionFormat( 35632, 36337 ).precision > 0 ) {\n\n\t\t\t\treturn 'mediump';\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn 'lowp';\n\n\t}\n\n\t/* eslint-disable no-undef */\n\tvar isWebGL2 = ( typeof WebGL2RenderingContext !== 'undefined' && gl instanceof WebGL2RenderingContext ) ||\n\t\t( typeof WebGL2ComputeRenderingContext !== 'undefined' && gl instanceof WebGL2ComputeRenderingContext );\n\t/* eslint-enable no-undef */\n\n\tvar precision = parameters.precision !== undefined ? parameters.precision : 'highp';\n\tvar maxPrecision = getMaxPrecision( precision );\n\n\tif ( maxPrecision !== precision ) {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer:', precision, 'not supported, using', maxPrecision, 'instead.' );\n\t\tprecision = maxPrecision;\n\n\t}\n\n\tvar logarithmicDepthBuffer = parameters.logarithmicDepthBuffer === true;\n\n\tvar maxTextures = gl.getParameter( 34930 );\n\tvar maxVertexTextures = gl.getParameter( 35660 );\n\tvar maxTextureSize = gl.getParameter( 3379 );\n\tvar maxCubemapSize = gl.getParameter( 34076 );\n\n\tvar maxAttributes = gl.getParameter( 34921 );\n\tvar maxVertexUniforms = gl.getParameter( 36347 );\n\tvar maxVaryings = gl.getParameter( 36348 );\n\tvar maxFragmentUniforms = gl.getParameter( 36349 );\n\n\tvar vertexTextures = maxVertexTextures > 0;\n\tvar floatFragmentTextures = isWebGL2 || !! extensions.get( 'OES_texture_float' );\n\tvar floatVertexTextures = vertexTextures && floatFragmentTextures;\n\n\tvar maxSamples = isWebGL2 ? gl.getParameter( 36183 ) : 0;\n\n\treturn {\n\n\t\tisWebGL2: isWebGL2,\n\n\t\tgetMaxAnisotropy: getMaxAnisotropy,\n\t\tgetMaxPrecision: getMaxPrecision,\n\n\t\tprecision: precision,\n\t\tlogarithmicDepthBuffer: logarithmicDepthBuffer,\n\n\t\tmaxTextures: maxTextures,\n\t\tmaxVertexTextures: maxVertexTextures,\n\t\tmaxTextureSize: maxTextureSize,\n\t\tmaxCubemapSize: maxCubemapSize,\n\n\t\tmaxAttributes: maxAttributes,\n\t\tmaxVertexUniforms: maxVertexUniforms,\n\t\tmaxVaryings: maxVaryings,\n\t\tmaxFragmentUniforms: maxFragmentUniforms,\n\n\t\tvertexTextures: vertexTextures,\n\t\tfloatFragmentTextures: floatFragmentTextures,\n\t\tfloatVertexTextures: floatVertexTextures,\n\n\t\tmaxSamples: maxSamples\n\n\t};\n\n}\n\n/**\n * @author tschw\n */\n\nfunction WebGLClipping() {\n\n\tvar scope = this,\n\n\t\tglobalState = null,\n\t\tnumGlobalPlanes = 0,\n\t\tlocalClippingEnabled = false,\n\t\trenderingShadows = false,\n\n\t\tplane = new Plane(),\n\t\tviewNormalMatrix = new Matrix3(),\n\n\t\tuniform = { value: null, needsUpdate: false };\n\n\tthis.uniform = uniform;\n\tthis.numPlanes = 0;\n\tthis.numIntersection = 0;\n\n\tthis.init = function ( planes, enableLocalClipping, camera ) {\n\n\t\tvar enabled =\n\t\t\tplanes.length !== 0 ||\n\t\t\tenableLocalClipping ||\n\t\t\t// enable state of previous frame - the clipping code has to\n\t\t\t// run another frame in order to reset the state:\n\t\t\tnumGlobalPlanes !== 0 ||\n\t\t\tlocalClippingEnabled;\n\n\t\tlocalClippingEnabled = enableLocalClipping;\n\n\t\tglobalState = projectPlanes( planes, camera, 0 );\n\t\tnumGlobalPlanes = planes.length;\n\n\t\treturn enabled;\n\n\t};\n\n\tthis.beginShadows = function () {\n\n\t\trenderingShadows = true;\n\t\tprojectPlanes( null );\n\n\t};\n\n\tthis.endShadows = function () {\n\n\t\trenderingShadows = false;\n\t\tresetGlobalState();\n\n\t};\n\n\tthis.setState = function ( planes, clipIntersection, clipShadows, camera, cache, fromCache ) {\n\n\t\tif ( ! localClippingEnabled || planes === null || planes.length === 0 || renderingShadows && ! clipShadows ) {\n\n\t\t\t// there's no local clipping\n\n\t\t\tif ( renderingShadows ) {\n\n\t\t\t\t// there's no global clipping\n\n\t\t\t\tprojectPlanes( null );\n\n\t\t\t} else {\n\n\t\t\t\tresetGlobalState();\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\tvar nGlobal = renderingShadows ? 0 : numGlobalPlanes,\n\t\t\t\tlGlobal = nGlobal * 4,\n\n\t\t\t\tdstArray = cache.clippingState || null;\n\n\t\t\tuniform.value = dstArray; // ensure unique state\n\n\t\t\tdstArray = projectPlanes( planes, camera, lGlobal, fromCache );\n\n\t\t\tfor ( var i = 0; i !== lGlobal; ++ i ) {\n\n\t\t\t\tdstArray[ i ] = globalState[ i ];\n\n\t\t\t}\n\n\t\t\tcache.clippingState = dstArray;\n\t\t\tthis.numIntersection = clipIntersection ? this.numPlanes : 0;\n\t\t\tthis.numPlanes += nGlobal;\n\n\t\t}\n\n\n\t};\n\n\tfunction resetGlobalState() {\n\n\t\tif ( uniform.value !== globalState ) {\n\n\t\t\tuniform.value = globalState;\n\t\t\tuniform.needsUpdate = numGlobalPlanes > 0;\n\n\t\t}\n\n\t\tscope.numPlanes = numGlobalPlanes;\n\t\tscope.numIntersection = 0;\n\n\t}\n\n\tfunction projectPlanes( planes, camera, dstOffset, skipTransform ) {\n\n\t\tvar nPlanes = planes !== null ? planes.length : 0,\n\t\t\tdstArray = null;\n\n\t\tif ( nPlanes !== 0 ) {\n\n\t\t\tdstArray = uniform.value;\n\n\t\t\tif ( skipTransform !== true || dstArray === null ) {\n\n\t\t\t\tvar flatSize = dstOffset + nPlanes * 4,\n\t\t\t\t\tviewMatrix = camera.matrixWorldInverse;\n\n\t\t\t\tviewNormalMatrix.getNormalMatrix( viewMatrix );\n\n\t\t\t\tif ( dstArray === null || dstArray.length < flatSize ) {\n\n\t\t\t\t\tdstArray = new Float32Array( flatSize );\n\n\t\t\t\t}\n\n\t\t\t\tfor ( var i = 0, i4 = dstOffset; i !== nPlanes; ++ i, i4 += 4 ) {\n\n\t\t\t\t\tplane.copy( planes[ i ] ).applyMatrix4( viewMatrix, viewNormalMatrix );\n\n\t\t\t\t\tplane.normal.toArray( dstArray, i4 );\n\t\t\t\t\tdstArray[ i4 + 3 ] = plane.constant;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tuniform.value = dstArray;\n\t\t\tuniform.needsUpdate = true;\n\n\t\t}\n\n\t\tscope.numPlanes = nPlanes;\n\t\tscope.numIntersection = 0;\n\n\t\treturn dstArray;\n\n\t}\n\n}\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction WebGLExtensions( gl ) {\n\n\tvar extensions = {};\n\n\treturn {\n\n\t\tget: function ( name ) {\n\n\t\t\tif ( extensions[ name ] !== undefined ) {\n\n\t\t\t\treturn extensions[ name ];\n\n\t\t\t}\n\n\t\t\tvar extension;\n\n\t\t\tswitch ( name ) {\n\n\t\t\t\tcase 'WEBGL_depth_texture':\n\t\t\t\t\textension = gl.getExtension( 'WEBGL_depth_texture' ) || gl.getExtension( 'MOZ_WEBGL_depth_texture' ) || gl.getExtension( 'WEBKIT_WEBGL_depth_texture' );\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase 'EXT_texture_filter_anisotropic':\n\t\t\t\t\textension = gl.getExtension( 'EXT_texture_filter_anisotropic' ) || gl.getExtension( 'MOZ_EXT_texture_filter_anisotropic' ) || gl.getExtension( 'WEBKIT_EXT_texture_filter_anisotropic' );\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase 'WEBGL_compressed_texture_s3tc':\n\t\t\t\t\textension = gl.getExtension( 'WEBGL_compressed_texture_s3tc' ) || gl.getExtension( 'MOZ_WEBGL_compressed_texture_s3tc' ) || gl.getExtension( 'WEBKIT_WEBGL_compressed_texture_s3tc' );\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase 'WEBGL_compressed_texture_pvrtc':\n\t\t\t\t\textension = gl.getExtension( 'WEBGL_compressed_texture_pvrtc' ) || gl.getExtension( 'WEBKIT_WEBGL_compressed_texture_pvrtc' );\n\t\t\t\t\tbreak;\n\n\t\t\t\tdefault:\n\t\t\t\t\textension = gl.getExtension( name );\n\n\t\t\t}\n\n\t\t\tif ( extension === null ) {\n\n\t\t\t\tconsole.warn( 'THREE.WebGLRenderer: ' + name + ' extension not supported.' );\n\n\t\t\t}\n\n\t\t\textensions[ name ] = extension;\n\n\t\t\treturn extension;\n\n\t\t}\n\n\t};\n\n}\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction WebGLGeometries( gl, attributes, info ) {\n\n\tvar geometries = new WeakMap();\n\tvar wireframeAttributes = new WeakMap();\n\n\tfunction onGeometryDispose( event ) {\n\n\t\tvar geometry = event.target;\n\t\tvar buffergeometry = geometries.get( geometry );\n\n\t\tif ( buffergeometry.index !== null ) {\n\n\t\t\tattributes.remove( buffergeometry.index );\n\n\t\t}\n\n\t\tfor ( var name in buffergeometry.attributes ) {\n\n\t\t\tattributes.remove( buffergeometry.attributes[ name ] );\n\n\t\t}\n\n\t\tgeometry.removeEventListener( 'dispose', onGeometryDispose );\n\n\t\tgeometries.delete( geometry );\n\n\t\tvar attribute = wireframeAttributes.get( buffergeometry );\n\n\t\tif ( attribute ) {\n\n\t\t\tattributes.remove( attribute );\n\t\t\twireframeAttributes.delete( buffergeometry );\n\n\t\t}\n\n\t\t//\n\n\t\tinfo.memory.geometries --;\n\n\t}\n\n\tfunction get( object, geometry ) {\n\n\t\tvar buffergeometry = geometries.get( geometry );\n\n\t\tif ( buffergeometry ) return buffergeometry;\n\n\t\tgeometry.addEventListener( 'dispose', onGeometryDispose );\n\n\t\tif ( geometry.isBufferGeometry ) {\n\n\t\t\tbuffergeometry = geometry;\n\n\t\t} else if ( geometry.isGeometry ) {\n\n\t\t\tif ( geometry._bufferGeometry === undefined ) {\n\n\t\t\t\tgeometry._bufferGeometry = new BufferGeometry().setFromObject( object );\n\n\t\t\t}\n\n\t\t\tbuffergeometry = geometry._bufferGeometry;\n\n\t\t}\n\n\t\tgeometries.set( geometry, buffergeometry );\n\n\t\tinfo.memory.geometries ++;\n\n\t\treturn buffergeometry;\n\n\t}\n\n\tfunction update( geometry ) {\n\n\t\tvar index = geometry.index;\n\t\tvar geometryAttributes = geometry.attributes;\n\n\t\tif ( index !== null ) {\n\n\t\t\tattributes.update( index, 34963 );\n\n\t\t}\n\n\t\tfor ( var name in geometryAttributes ) {\n\n\t\t\tattributes.update( geometryAttributes[ name ], 34962 );\n\n\t\t}\n\n\t\t// morph targets\n\n\t\tvar morphAttributes = geometry.morphAttributes;\n\n\t\tfor ( var name in morphAttributes ) {\n\n\t\t\tvar array = morphAttributes[ name ];\n\n\t\t\tfor ( var i = 0, l = array.length; i < l; i ++ ) {\n\n\t\t\t\tattributes.update( array[ i ], 34962 );\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\tfunction updateWireframeAttribute( geometry ) {\n\n\t\tvar indices = [];\n\n\t\tvar geometryIndex = geometry.index;\n\t\tvar geometryPosition = geometry.attributes.position;\n\t\tvar version = 0;\n\n\t\tif ( geometryIndex !== null ) {\n\n\t\t\tvar array = geometryIndex.array;\n\t\t\tversion = geometryIndex.version;\n\n\t\t\tfor ( var i = 0, l = array.length; i < l; i += 3 ) {\n\n\t\t\t\tvar a = array[ i + 0 ];\n\t\t\t\tvar b = array[ i + 1 ];\n\t\t\t\tvar c = array[ i + 2 ];\n\n\t\t\t\tindices.push( a, b, b, c, c, a );\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\tvar array = geometryPosition.array;\n\t\t\tversion = geometryPosition.version;\n\n\t\t\tfor ( var i = 0, l = ( array.length / 3 ) - 1; i < l; i += 3 ) {\n\n\t\t\t\tvar a = i + 0;\n\t\t\t\tvar b = i + 1;\n\t\t\t\tvar c = i + 2;\n\n\t\t\t\tindices.push( a, b, b, c, c, a );\n\n\t\t\t}\n\n\t\t}\n\n\t\tvar attribute = new ( arrayMax( indices ) > 65535 ? Uint32BufferAttribute : Uint16BufferAttribute )( indices, 1 );\n\t\tattribute.version = version;\n\n\t\tattributes.update( attribute, 34963 );\n\n\t\t//\n\n\t\tvar previousAttribute = wireframeAttributes.get( geometry );\n\n\t\tif ( previousAttribute ) attributes.remove( previousAttribute );\n\n\t\t//\n\n\t\twireframeAttributes.set( geometry, attribute );\n\n\t}\n\n\tfunction getWireframeAttribute( geometry ) {\n\n\t\tvar currentAttribute = wireframeAttributes.get( geometry );\n\n\t\tif ( currentAttribute ) {\n\n\t\t\tvar geometryIndex = geometry.index;\n\n\t\t\tif ( geometryIndex !== null ) {\n\n\t\t\t\t// if the attribute is obsolete, create a new one\n\n\t\t\t\tif ( currentAttribute.version < geometryIndex.version ) {\n\n\t\t\t\t\tupdateWireframeAttribute( geometry );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\tupdateWireframeAttribute( geometry );\n\n\t\t}\n\n\t\treturn wireframeAttributes.get( geometry );\n\n\t}\n\n\treturn {\n\n\t\tget: get,\n\t\tupdate: update,\n\n\t\tgetWireframeAttribute: getWireframeAttribute\n\n\t};\n\n}\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction WebGLIndexedBufferRenderer( gl, extensions, info, capabilities ) {\n\n\tvar isWebGL2 = capabilities.isWebGL2;\n\n\tvar mode;\n\n\tfunction setMode( value ) {\n\n\t\tmode = value;\n\n\t}\n\n\tvar type, bytesPerElement;\n\n\tfunction setIndex( value ) {\n\n\t\ttype = value.type;\n\t\tbytesPerElement = value.bytesPerElement;\n\n\t}\n\n\tfunction render( start, count ) {\n\n\t\tgl.drawElements( mode, count, type, start * bytesPerElement );\n\n\t\tinfo.update( count, mode );\n\n\t}\n\n\tfunction renderInstances( geometry, start, count, primcount ) {\n\n\t\tif ( primcount === 0 ) return;\n\n\t\tvar extension, methodName;\n\n\t\tif ( isWebGL2 ) {\n\n\t\t\textension = gl;\n\t\t\tmethodName = 'drawElementsInstanced';\n\n\t\t} else {\n\n\t\t\textension = extensions.get( 'ANGLE_instanced_arrays' );\n\t\t\tmethodName = 'drawElementsInstancedANGLE';\n\n\t\t\tif ( extension === null ) {\n\n\t\t\t\tconsole.error( 'THREE.WebGLIndexedBufferRenderer: using THREE.InstancedBufferGeometry but hardware does not support extension ANGLE_instanced_arrays.' );\n\t\t\t\treturn;\n\n\t\t\t}\n\n\t\t}\n\n\t\textension[ methodName ]( mode, count, type, start * bytesPerElement, primcount );\n\n\t\tinfo.update( count, mode, primcount );\n\n\t}\n\n\t//\n\n\tthis.setMode = setMode;\n\tthis.setIndex = setIndex;\n\tthis.render = render;\n\tthis.renderInstances = renderInstances;\n\n}\n\n/**\n * @author Mugen87 / https://github.com/Mugen87\n */\n\nfunction WebGLInfo( gl ) {\n\n\tvar memory = {\n\t\tgeometries: 0,\n\t\ttextures: 0\n\t};\n\n\tvar render = {\n\t\tframe: 0,\n\t\tcalls: 0,\n\t\ttriangles: 0,\n\t\tpoints: 0,\n\t\tlines: 0\n\t};\n\n\tfunction update( count, mode, instanceCount ) {\n\n\t\tinstanceCount = instanceCount || 1;\n\n\t\trender.calls ++;\n\n\t\tswitch ( mode ) {\n\n\t\t\tcase 4:\n\t\t\t\trender.triangles += instanceCount * ( count / 3 );\n\t\t\t\tbreak;\n\n\t\t\tcase 1:\n\t\t\t\trender.lines += instanceCount * ( count / 2 );\n\t\t\t\tbreak;\n\n\t\t\tcase 3:\n\t\t\t\trender.lines += instanceCount * ( count - 1 );\n\t\t\t\tbreak;\n\n\t\t\tcase 2:\n\t\t\t\trender.lines += instanceCount * count;\n\t\t\t\tbreak;\n\n\t\t\tcase 0:\n\t\t\t\trender.points += instanceCount * count;\n\t\t\t\tbreak;\n\n\t\t\tdefault:\n\t\t\t\tconsole.error( 'THREE.WebGLInfo: Unknown draw mode:', mode );\n\t\t\t\tbreak;\n\n\t\t}\n\n\t}\n\n\tfunction reset() {\n\n\t\trender.frame ++;\n\t\trender.calls = 0;\n\t\trender.triangles = 0;\n\t\trender.points = 0;\n\t\trender.lines = 0;\n\n\t}\n\n\treturn {\n\t\tmemory: memory,\n\t\trender: render,\n\t\tprograms: null,\n\t\tautoReset: true,\n\t\treset: reset,\n\t\tupdate: update\n\t};\n\n}\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction absNumericalSort( a, b ) {\n\n\treturn Math.abs( b[ 1 ] ) - Math.abs( a[ 1 ] );\n\n}\n\nfunction WebGLMorphtargets( gl ) {\n\n\tvar influencesList = {};\n\tvar morphInfluences = new Float32Array( 8 );\n\n\tfunction update( object, geometry, material, program ) {\n\n\t\tvar objectInfluences = object.morphTargetInfluences;\n\n\t\t// When object doesn't have morph target influences defined, we treat it as a 0-length array\n\t\t// This is important to make sure we set up morphTargetBaseInfluence / morphTargetInfluences\n\n\t\tvar length = objectInfluences === undefined ? 0 : objectInfluences.length;\n\n\t\tvar influences = influencesList[ geometry.id ];\n\n\t\tif ( influences === undefined ) {\n\n\t\t\t// initialise list\n\n\t\t\tinfluences = [];\n\n\t\t\tfor ( var i = 0; i < length; i ++ ) {\n\n\t\t\t\tinfluences[ i ] = [ i, 0 ];\n\n\t\t\t}\n\n\t\t\tinfluencesList[ geometry.id ] = influences;\n\n\t\t}\n\n\t\tvar morphTargets = material.morphTargets && geometry.morphAttributes.position;\n\t\tvar morphNormals = material.morphNormals && geometry.morphAttributes.normal;\n\n\t\t// Remove current morphAttributes\n\n\t\tfor ( var i = 0; i < length; i ++ ) {\n\n\t\t\tvar influence = influences[ i ];\n\n\t\t\tif ( influence[ 1 ] !== 0 ) {\n\n\t\t\t\tif ( morphTargets ) geometry.deleteAttribute( 'morphTarget' + i );\n\t\t\t\tif ( morphNormals ) geometry.deleteAttribute( 'morphNormal' + i );\n\n\t\t\t}\n\n\t\t}\n\n\t\t// Collect influences\n\n\t\tfor ( var i = 0; i < length; i ++ ) {\n\n\t\t\tvar influence = influences[ i ];\n\n\t\t\tinfluence[ 0 ] = i;\n\t\t\tinfluence[ 1 ] = objectInfluences[ i ];\n\n\t\t}\n\n\t\tinfluences.sort( absNumericalSort );\n\n\t\t// Add morphAttributes\n\n\t\tvar morphInfluencesSum = 0;\n\n\t\tfor ( var i = 0; i < 8; i ++ ) {\n\n\t\t\tvar influence = influences[ i ];\n\n\t\t\tif ( influence ) {\n\n\t\t\t\tvar index = influence[ 0 ];\n\t\t\t\tvar value = influence[ 1 ];\n\n\t\t\t\tif ( value ) {\n\n\t\t\t\t\tif ( morphTargets ) geometry.setAttribute( 'morphTarget' + i, morphTargets[ index ] );\n\t\t\t\t\tif ( morphNormals ) geometry.setAttribute( 'morphNormal' + i, morphNormals[ index ] );\n\n\t\t\t\t\tmorphInfluences[ i ] = value;\n\t\t\t\t\tmorphInfluencesSum += value;\n\t\t\t\t\tcontinue;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tmorphInfluences[ i ] = 0;\n\n\t\t}\n\n\t\t// GLSL shader uses formula baseinfluence * base + sum(target * influence)\n\t\t// This allows us to switch between absolute morphs and relative morphs without changing shader code\n\t\t// When baseinfluence = 1 - sum(influence), the above is equivalent to sum((target - base) * influence)\n\t\tvar morphBaseInfluence = geometry.morphTargetsRelative ? 1 : 1 - morphInfluencesSum;\n\n\t\tprogram.getUniforms().setValue( gl, 'morphTargetBaseInfluence', morphBaseInfluence );\n\t\tprogram.getUniforms().setValue( gl, 'morphTargetInfluences', morphInfluences );\n\n\t}\n\n\treturn {\n\n\t\tupdate: update\n\n\t};\n\n}\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction WebGLObjects( gl, geometries, attributes, info ) {\n\n\tvar updateMap = new WeakMap();\n\n\tfunction update( object ) {\n\n\t\tvar frame = info.render.frame;\n\n\t\tvar geometry = object.geometry;\n\t\tvar buffergeometry = geometries.get( object, geometry );\n\n\t\t// Update once per frame\n\n\t\tif ( updateMap.get( buffergeometry ) !== frame ) {\n\n\t\t\tif ( geometry.isGeometry ) {\n\n\t\t\t\tbuffergeometry.updateFromObject( object );\n\n\t\t\t}\n\n\t\t\tgeometries.update( buffergeometry );\n\n\t\t\tupdateMap.set( buffergeometry, frame );\n\n\t\t}\n\n\t\tif ( object.isInstancedMesh ) {\n\n\t\t\tattributes.update( object.instanceMatrix, 34962 );\n\n\t\t}\n\n\t\treturn buffergeometry;\n\n\t}\n\n\tfunction dispose() {\n\n\t\tupdateMap = new WeakMap();\n\n\t}\n\n\treturn {\n\n\t\tupdate: update,\n\t\tdispose: dispose\n\n\t};\n\n}\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction CubeTexture( images, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding ) {\n\n\timages = images !== undefined ? images : [];\n\tmapping = mapping !== undefined ? mapping : CubeReflectionMapping;\n\tformat = format !== undefined ? format : RGBFormat;\n\n\tTexture.call( this, images, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding );\n\n\tthis.flipY = false;\n\n}\n\nCubeTexture.prototype = Object.create( Texture.prototype );\nCubeTexture.prototype.constructor = CubeTexture;\n\nCubeTexture.prototype.isCubeTexture = true;\n\nObject.defineProperty( CubeTexture.prototype, 'images', {\n\n\tget: function () {\n\n\t\treturn this.image;\n\n\t},\n\n\tset: function ( value ) {\n\n\t\tthis.image = value;\n\n\t}\n\n} );\n\n/**\n * @author Takahiro https://github.com/takahirox\n */\n\nfunction DataTexture2DArray( data, width, height, depth ) {\n\n\tTexture.call( this, null );\n\n\tthis.image = { data: data || null, width: width || 1, height: height || 1, depth: depth || 1 };\n\n\tthis.magFilter = NearestFilter;\n\tthis.minFilter = NearestFilter;\n\n\tthis.wrapR = ClampToEdgeWrapping;\n\n\tthis.generateMipmaps = false;\n\tthis.flipY = false;\n\n\tthis.needsUpdate = true;\n\n}\n\nDataTexture2DArray.prototype = Object.create( Texture.prototype );\nDataTexture2DArray.prototype.constructor = DataTexture2DArray;\nDataTexture2DArray.prototype.isDataTexture2DArray = true;\n\n/**\n * @author Artur Trzesiok\n */\n\nfunction DataTexture3D( data, width, height, depth ) {\n\n\t// We're going to add .setXXX() methods for setting properties later.\n\t// Users can still set in DataTexture3D directly.\n\t//\n\t//\tvar texture = new THREE.DataTexture3D( data, width, height, depth );\n\t// \ttexture.anisotropy = 16;\n\t//\n\t// See #14839\n\n\tTexture.call( this, null );\n\n\tthis.image = { data: data || null, width: width || 1, height: height || 1, depth: depth || 1 };\n\n\tthis.magFilter = NearestFilter;\n\tthis.minFilter = NearestFilter;\n\n\tthis.wrapR = ClampToEdgeWrapping;\n\n\tthis.generateMipmaps = false;\n\tthis.flipY = false;\n\n\tthis.needsUpdate = true;\n\n\n}\n\nDataTexture3D.prototype = Object.create( Texture.prototype );\nDataTexture3D.prototype.constructor = DataTexture3D;\nDataTexture3D.prototype.isDataTexture3D = true;\n\n/**\n * @author tschw\n * @author Mugen87 / https://github.com/Mugen87\n * @author mrdoob / http://mrdoob.com/\n *\n * Uniforms of a program.\n * Those form a tree structure with a special top-level container for the root,\n * which you get by calling 'new WebGLUniforms( gl, program )'.\n *\n *\n * Properties of inner nodes including the top-level container:\n *\n * .seq - array of nested uniforms\n * .map - nested uniforms by name\n *\n *\n * Methods of all nodes except the top-level container:\n *\n * .setValue( gl, value, [textures] )\n *\n * \t\tuploads a uniform value(s)\n *  \tthe 'textures' parameter is needed for sampler uniforms\n *\n *\n * Static methods of the top-level container (textures factorizations):\n *\n * .upload( gl, seq, values, textures )\n *\n * \t\tsets uniforms in 'seq' to 'values[id].value'\n *\n * .seqWithValue( seq, values ) : filteredSeq\n *\n * \t\tfilters 'seq' entries with corresponding entry in values\n *\n *\n * Methods of the top-level container (textures factorizations):\n *\n * .setValue( gl, name, value, textures )\n *\n * \t\tsets uniform with  name 'name' to 'value'\n *\n * .setOptional( gl, obj, prop )\n *\n * \t\tlike .set for an optional property of the object\n *\n */\n\nvar emptyTexture = new Texture();\nvar emptyTexture2dArray = new DataTexture2DArray();\nvar emptyTexture3d = new DataTexture3D();\nvar emptyCubeTexture = new CubeTexture();\n\n// --- Utilities ---\n\n// Array Caches (provide typed arrays for temporary by size)\n\nvar arrayCacheF32 = [];\nvar arrayCacheI32 = [];\n\n// Float32Array caches used for uploading Matrix uniforms\n\nvar mat4array = new Float32Array( 16 );\nvar mat3array = new Float32Array( 9 );\nvar mat2array = new Float32Array( 4 );\n\n// Flattening for arrays of vectors and matrices\n\nfunction flatten( array, nBlocks, blockSize ) {\n\n\tvar firstElem = array[ 0 ];\n\n\tif ( firstElem <= 0 || firstElem > 0 ) return array;\n\t// unoptimized: ! isNaN( firstElem )\n\t// see http://jacksondunstan.com/articles/983\n\n\tvar n = nBlocks * blockSize,\n\t\tr = arrayCacheF32[ n ];\n\n\tif ( r === undefined ) {\n\n\t\tr = new Float32Array( n );\n\t\tarrayCacheF32[ n ] = r;\n\n\t}\n\n\tif ( nBlocks !== 0 ) {\n\n\t\tfirstElem.toArray( r, 0 );\n\n\t\tfor ( var i = 1, offset = 0; i !== nBlocks; ++ i ) {\n\n\t\t\toffset += blockSize;\n\t\t\tarray[ i ].toArray( r, offset );\n\n\t\t}\n\n\t}\n\n\treturn r;\n\n}\n\nfunction arraysEqual( a, b ) {\n\n\tif ( a.length !== b.length ) return false;\n\n\tfor ( var i = 0, l = a.length; i < l; i ++ ) {\n\n\t\tif ( a[ i ] !== b[ i ] ) return false;\n\n\t}\n\n\treturn true;\n\n}\n\nfunction copyArray( a, b ) {\n\n\tfor ( var i = 0, l = b.length; i < l; i ++ ) {\n\n\t\ta[ i ] = b[ i ];\n\n\t}\n\n}\n\n// Texture unit allocation\n\nfunction allocTexUnits( textures, n ) {\n\n\tvar r = arrayCacheI32[ n ];\n\n\tif ( r === undefined ) {\n\n\t\tr = new Int32Array( n );\n\t\tarrayCacheI32[ n ] = r;\n\n\t}\n\n\tfor ( var i = 0; i !== n; ++ i )\n\t\tr[ i ] = textures.allocateTextureUnit();\n\n\treturn r;\n\n}\n\n// --- Setters ---\n\n// Note: Defining these methods externally, because they come in a bunch\n// and this way their names minify.\n\n// Single scalar\n\nfunction setValueV1f( gl, v ) {\n\n\tvar cache = this.cache;\n\n\tif ( cache[ 0 ] === v ) return;\n\n\tgl.uniform1f( this.addr, v );\n\n\tcache[ 0 ] = v;\n\n}\n\n// Single float vector (from flat array or THREE.VectorN)\n\nfunction setValueV2f( gl, v ) {\n\n\tvar cache = this.cache;\n\n\tif ( v.x !== undefined ) {\n\n\t\tif ( cache[ 0 ] !== v.x || cache[ 1 ] !== v.y ) {\n\n\t\t\tgl.uniform2f( this.addr, v.x, v.y );\n\n\t\t\tcache[ 0 ] = v.x;\n\t\t\tcache[ 1 ] = v.y;\n\n\t\t}\n\n\t} else {\n\n\t\tif ( arraysEqual( cache, v ) ) return;\n\n\t\tgl.uniform2fv( this.addr, v );\n\n\t\tcopyArray( cache, v );\n\n\t}\n\n}\n\nfunction setValueV3f( gl, v ) {\n\n\tvar cache = this.cache;\n\n\tif ( v.x !== undefined ) {\n\n\t\tif ( cache[ 0 ] !== v.x || cache[ 1 ] !== v.y || cache[ 2 ] !== v.z ) {\n\n\t\t\tgl.uniform3f( this.addr, v.x, v.y, v.z );\n\n\t\t\tcache[ 0 ] = v.x;\n\t\t\tcache[ 1 ] = v.y;\n\t\t\tcache[ 2 ] = v.z;\n\n\t\t}\n\n\t} else if ( v.r !== undefined ) {\n\n\t\tif ( cache[ 0 ] !== v.r || cache[ 1 ] !== v.g || cache[ 2 ] !== v.b ) {\n\n\t\t\tgl.uniform3f( this.addr, v.r, v.g, v.b );\n\n\t\t\tcache[ 0 ] = v.r;\n\t\t\tcache[ 1 ] = v.g;\n\t\t\tcache[ 2 ] = v.b;\n\n\t\t}\n\n\t} else {\n\n\t\tif ( arraysEqual( cache, v ) ) return;\n\n\t\tgl.uniform3fv( this.addr, v );\n\n\t\tcopyArray( cache, v );\n\n\t}\n\n}\n\nfunction setValueV4f( gl, v ) {\n\n\tvar cache = this.cache;\n\n\tif ( v.x !== undefined ) {\n\n\t\tif ( cache[ 0 ] !== v.x || cache[ 1 ] !== v.y || cache[ 2 ] !== v.z || cache[ 3 ] !== v.w ) {\n\n\t\t\tgl.uniform4f( this.addr, v.x, v.y, v.z, v.w );\n\n\t\t\tcache[ 0 ] = v.x;\n\t\t\tcache[ 1 ] = v.y;\n\t\t\tcache[ 2 ] = v.z;\n\t\t\tcache[ 3 ] = v.w;\n\n\t\t}\n\n\t} else {\n\n\t\tif ( arraysEqual( cache, v ) ) return;\n\n\t\tgl.uniform4fv( this.addr, v );\n\n\t\tcopyArray( cache, v );\n\n\t}\n\n}\n\n// Single matrix (from flat array or MatrixN)\n\nfunction setValueM2( gl, v ) {\n\n\tvar cache = this.cache;\n\tvar elements = v.elements;\n\n\tif ( elements === undefined ) {\n\n\t\tif ( arraysEqual( cache, v ) ) return;\n\n\t\tgl.uniformMatrix2fv( this.addr, false, v );\n\n\t\tcopyArray( cache, v );\n\n\t} else {\n\n\t\tif ( arraysEqual( cache, elements ) ) return;\n\n\t\tmat2array.set( elements );\n\n\t\tgl.uniformMatrix2fv( this.addr, false, mat2array );\n\n\t\tcopyArray( cache, elements );\n\n\t}\n\n}\n\nfunction setValueM3( gl, v ) {\n\n\tvar cache = this.cache;\n\tvar elements = v.elements;\n\n\tif ( elements === undefined ) {\n\n\t\tif ( arraysEqual( cache, v ) ) return;\n\n\t\tgl.uniformMatrix3fv( this.addr, false, v );\n\n\t\tcopyArray( cache, v );\n\n\t} else {\n\n\t\tif ( arraysEqual( cache, elements ) ) return;\n\n\t\tmat3array.set( elements );\n\n\t\tgl.uniformMatrix3fv( this.addr, false, mat3array );\n\n\t\tcopyArray( cache, elements );\n\n\t}\n\n}\n\nfunction setValueM4( gl, v ) {\n\n\tvar cache = this.cache;\n\tvar elements = v.elements;\n\n\tif ( elements === undefined ) {\n\n\t\tif ( arraysEqual( cache, v ) ) return;\n\n\t\tgl.uniformMatrix4fv( this.addr, false, v );\n\n\t\tcopyArray( cache, v );\n\n\t} else {\n\n\t\tif ( arraysEqual( cache, elements ) ) return;\n\n\t\tmat4array.set( elements );\n\n\t\tgl.uniformMatrix4fv( this.addr, false, mat4array );\n\n\t\tcopyArray( cache, elements );\n\n\t}\n\n}\n\n// Single texture (2D / Cube)\n\nfunction setValueT1( gl, v, textures ) {\n\n\tvar cache = this.cache;\n\tvar unit = textures.allocateTextureUnit();\n\n\tif ( cache[ 0 ] !== unit ) {\n\n\t\tgl.uniform1i( this.addr, unit );\n\t\tcache[ 0 ] = unit;\n\n\t}\n\n\ttextures.safeSetTexture2D( v || emptyTexture, unit );\n\n}\n\nfunction setValueT2DArray1( gl, v, textures ) {\n\n\tvar cache = this.cache;\n\tvar unit = textures.allocateTextureUnit();\n\n\tif ( cache[ 0 ] !== unit ) {\n\n\t\tgl.uniform1i( this.addr, unit );\n\t\tcache[ 0 ] = unit;\n\n\t}\n\n\ttextures.setTexture2DArray( v || emptyTexture2dArray, unit );\n\n}\n\nfunction setValueT3D1( gl, v, textures ) {\n\n\tvar cache = this.cache;\n\tvar unit = textures.allocateTextureUnit();\n\n\tif ( cache[ 0 ] !== unit ) {\n\n\t\tgl.uniform1i( this.addr, unit );\n\t\tcache[ 0 ] = unit;\n\n\t}\n\n\ttextures.setTexture3D( v || emptyTexture3d, unit );\n\n}\n\nfunction setValueT6( gl, v, textures ) {\n\n\tvar cache = this.cache;\n\tvar unit = textures.allocateTextureUnit();\n\n\tif ( cache[ 0 ] !== unit ) {\n\n\t\tgl.uniform1i( this.addr, unit );\n\t\tcache[ 0 ] = unit;\n\n\t}\n\n\ttextures.safeSetTextureCube( v || emptyCubeTexture, unit );\n\n}\n\n// Integer / Boolean vectors or arrays thereof (always flat arrays)\n\nfunction setValueV1i( gl, v ) {\n\n\tvar cache = this.cache;\n\n\tif ( cache[ 0 ] === v ) return;\n\n\tgl.uniform1i( this.addr, v );\n\n\tcache[ 0 ] = v;\n\n}\n\nfunction setValueV2i( gl, v ) {\n\n\tvar cache = this.cache;\n\n\tif ( arraysEqual( cache, v ) ) return;\n\n\tgl.uniform2iv( this.addr, v );\n\n\tcopyArray( cache, v );\n\n}\n\nfunction setValueV3i( gl, v ) {\n\n\tvar cache = this.cache;\n\n\tif ( arraysEqual( cache, v ) ) return;\n\n\tgl.uniform3iv( this.addr, v );\n\n\tcopyArray( cache, v );\n\n}\n\nfunction setValueV4i( gl, v ) {\n\n\tvar cache = this.cache;\n\n\tif ( arraysEqual( cache, v ) ) return;\n\n\tgl.uniform4iv( this.addr, v );\n\n\tcopyArray( cache, v );\n\n}\n\n// uint\n\nfunction setValueV1ui( gl, v ) {\n\n\tvar cache = this.cache;\n\n\tif ( cache[ 0 ] === v ) return;\n\n\tgl.uniform1ui( this.addr, v );\n\n\tcache[ 0 ] = v;\n\n}\n\n// Helper to pick the right setter for the singular case\n\nfunction getSingularSetter( type ) {\n\n\tswitch ( type ) {\n\n\t\tcase 0x1406: return setValueV1f; // FLOAT\n\t\tcase 0x8b50: return setValueV2f; // _VEC2\n\t\tcase 0x8b51: return setValueV3f; // _VEC3\n\t\tcase 0x8b52: return setValueV4f; // _VEC4\n\n\t\tcase 0x8b5a: return setValueM2; // _MAT2\n\t\tcase 0x8b5b: return setValueM3; // _MAT3\n\t\tcase 0x8b5c: return setValueM4; // _MAT4\n\n\t\tcase 0x1404: case 0x8b56: return setValueV1i; // INT, BOOL\n\t\tcase 0x8b53: case 0x8b57: return setValueV2i; // _VEC2\n\t\tcase 0x8b54: case 0x8b58: return setValueV3i; // _VEC3\n\t\tcase 0x8b55: case 0x8b59: return setValueV4i; // _VEC4\n\n\t\tcase 0x1405: return setValueV1ui; // UINT\n\n\t\tcase 0x8b5e: // SAMPLER_2D\n\t\tcase 0x8d66: // SAMPLER_EXTERNAL_OES\n\t\tcase 0x8dca: // INT_SAMPLER_2D\n\t\tcase 0x8dd2: // UNSIGNED_INT_SAMPLER_2D\n\t\tcase 0x8b62: // SAMPLER_2D_SHADOW\n\t\t\treturn setValueT1;\n\n\t\tcase 0x8b5f: // SAMPLER_3D\n\t\tcase 0x8dcb: // INT_SAMPLER_3D\n\t\tcase 0x8dd3: // UNSIGNED_INT_SAMPLER_3D\n\t\t\treturn setValueT3D1;\n\n\t\tcase 0x8b60: // SAMPLER_CUBE\n\t\tcase 0x8dcc: // INT_SAMPLER_CUBE\n\t\tcase 0x8dd4: // UNSIGNED_INT_SAMPLER_CUBE\n\t\tcase 0x8dc5: // SAMPLER_CUBE_SHADOW\n\t\t\treturn setValueT6;\n\n\t\tcase 0x8dc1: // SAMPLER_2D_ARRAY\n\t\tcase 0x8dcf: // INT_SAMPLER_2D_ARRAY\n\t\tcase 0x8dd7: // UNSIGNED_INT_SAMPLER_2D_ARRAY\n\t\tcase 0x8dc4: // SAMPLER_2D_ARRAY_SHADOW\n\t\t\treturn setValueT2DArray1;\n\n\t}\n\n}\n\n// Array of scalars\nfunction setValueV1fArray( gl, v ) {\n\n\tgl.uniform1fv( this.addr, v );\n\n}\n\n// Integer / Boolean vectors or arrays thereof (always flat arrays)\nfunction setValueV1iArray( gl, v ) {\n\n\tgl.uniform1iv( this.addr, v );\n\n}\n\nfunction setValueV2iArray( gl, v ) {\n\n\tgl.uniform2iv( this.addr, v );\n\n}\n\nfunction setValueV3iArray( gl, v ) {\n\n\tgl.uniform3iv( this.addr, v );\n\n}\n\nfunction setValueV4iArray( gl, v ) {\n\n\tgl.uniform4iv( this.addr, v );\n\n}\n\n\n// Array of vectors (flat or from THREE classes)\n\nfunction setValueV2fArray( gl, v ) {\n\n\tvar data = flatten( v, this.size, 2 );\n\n\tgl.uniform2fv( this.addr, data );\n\n}\n\nfunction setValueV3fArray( gl, v ) {\n\n\tvar data = flatten( v, this.size, 3 );\n\n\tgl.uniform3fv( this.addr, data );\n\n}\n\nfunction setValueV4fArray( gl, v ) {\n\n\tvar data = flatten( v, this.size, 4 );\n\n\tgl.uniform4fv( this.addr, data );\n\n}\n\n// Array of matrices (flat or from THREE clases)\n\nfunction setValueM2Array( gl, v ) {\n\n\tvar data = flatten( v, this.size, 4 );\n\n\tgl.uniformMatrix2fv( this.addr, false, data );\n\n}\n\nfunction setValueM3Array( gl, v ) {\n\n\tvar data = flatten( v, this.size, 9 );\n\n\tgl.uniformMatrix3fv( this.addr, false, data );\n\n}\n\nfunction setValueM4Array( gl, v ) {\n\n\tvar data = flatten( v, this.size, 16 );\n\n\tgl.uniformMatrix4fv( this.addr, false, data );\n\n}\n\n// Array of textures (2D / Cube)\n\nfunction setValueT1Array( gl, v, textures ) {\n\n\tvar n = v.length;\n\n\tvar units = allocTexUnits( textures, n );\n\n\tgl.uniform1iv( this.addr, units );\n\n\tfor ( var i = 0; i !== n; ++ i ) {\n\n\t\ttextures.safeSetTexture2D( v[ i ] || emptyTexture, units[ i ] );\n\n\t}\n\n}\n\nfunction setValueT6Array( gl, v, textures ) {\n\n\tvar n = v.length;\n\n\tvar units = allocTexUnits( textures, n );\n\n\tgl.uniform1iv( this.addr, units );\n\n\tfor ( var i = 0; i !== n; ++ i ) {\n\n\t\ttextures.safeSetTextureCube( v[ i ] || emptyCubeTexture, units[ i ] );\n\n\t}\n\n}\n\n// Helper to pick the right setter for a pure (bottom-level) array\n\nfunction getPureArraySetter( type ) {\n\n\tswitch ( type ) {\n\n\t\tcase 0x1406: return setValueV1fArray; // FLOAT\n\t\tcase 0x8b50: return setValueV2fArray; // _VEC2\n\t\tcase 0x8b51: return setValueV3fArray; // _VEC3\n\t\tcase 0x8b52: return setValueV4fArray; // _VEC4\n\n\t\tcase 0x8b5a: return setValueM2Array; // _MAT2\n\t\tcase 0x8b5b: return setValueM3Array; // _MAT3\n\t\tcase 0x8b5c: return setValueM4Array; // _MAT4\n\n\t\tcase 0x1404: case 0x8b56: return setValueV1iArray; // INT, BOOL\n\t\tcase 0x8b53: case 0x8b57: return setValueV2iArray; // _VEC2\n\t\tcase 0x8b54: case 0x8b58: return setValueV3iArray; // _VEC3\n\t\tcase 0x8b55: case 0x8b59: return setValueV4iArray; // _VEC4\n\n\t\tcase 0x8b5e: // SAMPLER_2D\n\t\tcase 0x8d66: // SAMPLER_EXTERNAL_OES\n\t\tcase 0x8dca: // INT_SAMPLER_2D\n\t\tcase 0x8dd2: // UNSIGNED_INT_SAMPLER_2D\n\t\tcase 0x8b62: // SAMPLER_2D_SHADOW\n\t\t\treturn setValueT1Array;\n\n\t\tcase 0x8b60: // SAMPLER_CUBE\n\t\tcase 0x8dcc: // INT_SAMPLER_CUBE\n\t\tcase 0x8dd4: // UNSIGNED_INT_SAMPLER_CUBE\n\t\tcase 0x8dc5: // SAMPLER_CUBE_SHADOW\n\t\t\treturn setValueT6Array;\n\n\t}\n\n}\n\n// --- Uniform Classes ---\n\nfunction SingleUniform( id, activeInfo, addr ) {\n\n\tthis.id = id;\n\tthis.addr = addr;\n\tthis.cache = [];\n\tthis.setValue = getSingularSetter( activeInfo.type );\n\n\t// this.path = activeInfo.name; // DEBUG\n\n}\n\nfunction PureArrayUniform( id, activeInfo, addr ) {\n\n\tthis.id = id;\n\tthis.addr = addr;\n\tthis.cache = [];\n\tthis.size = activeInfo.size;\n\tthis.setValue = getPureArraySetter( activeInfo.type );\n\n\t// this.path = activeInfo.name; // DEBUG\n\n}\n\nPureArrayUniform.prototype.updateCache = function ( data ) {\n\n\tvar cache = this.cache;\n\n\tif ( data instanceof Float32Array && cache.length !== data.length ) {\n\n\t\tthis.cache = new Float32Array( data.length );\n\n\t}\n\n\tcopyArray( cache, data );\n\n};\n\nfunction StructuredUniform( id ) {\n\n\tthis.id = id;\n\n\tthis.seq = [];\n\tthis.map = {};\n\n}\n\nStructuredUniform.prototype.setValue = function ( gl, value, textures ) {\n\n\tvar seq = this.seq;\n\n\tfor ( var i = 0, n = seq.length; i !== n; ++ i ) {\n\n\t\tvar u = seq[ i ];\n\t\tu.setValue( gl, value[ u.id ], textures );\n\n\t}\n\n};\n\n// --- Top-level ---\n\n// Parser - builds up the property tree from the path strings\n\nvar RePathPart = /([\\w\\d_]+)(\\])?(\\[|\\.)?/g;\n\n// extracts\n// \t- the identifier (member name or array index)\n//  - followed by an optional right bracket (found when array index)\n//  - followed by an optional left bracket or dot (type of subscript)\n//\n// Note: These portions can be read in a non-overlapping fashion and\n// allow straightforward parsing of the hierarchy that WebGL encodes\n// in the uniform names.\n\nfunction addUniform( container, uniformObject ) {\n\n\tcontainer.seq.push( uniformObject );\n\tcontainer.map[ uniformObject.id ] = uniformObject;\n\n}\n\nfunction parseUniform( activeInfo, addr, container ) {\n\n\tvar path = activeInfo.name,\n\t\tpathLength = path.length;\n\n\t// reset RegExp object, because of the early exit of a previous run\n\tRePathPart.lastIndex = 0;\n\n\twhile ( true ) {\n\n\t\tvar match = RePathPart.exec( path ),\n\t\t\tmatchEnd = RePathPart.lastIndex,\n\n\t\t\tid = match[ 1 ],\n\t\t\tidIsIndex = match[ 2 ] === ']',\n\t\t\tsubscript = match[ 3 ];\n\n\t\tif ( idIsIndex ) id = id | 0; // convert to integer\n\n\t\tif ( subscript === undefined || subscript === '[' && matchEnd + 2 === pathLength ) {\n\n\t\t\t// bare name or \"pure\" bottom-level array \"[0]\" suffix\n\n\t\t\taddUniform( container, subscript === undefined ?\n\t\t\t\tnew SingleUniform( id, activeInfo, addr ) :\n\t\t\t\tnew PureArrayUniform( id, activeInfo, addr ) );\n\n\t\t\tbreak;\n\n\t\t} else {\n\n\t\t\t// step into inner node / create it in case it doesn't exist\n\n\t\t\tvar map = container.map, next = map[ id ];\n\n\t\t\tif ( next === undefined ) {\n\n\t\t\t\tnext = new StructuredUniform( id );\n\t\t\t\taddUniform( container, next );\n\n\t\t\t}\n\n\t\t\tcontainer = next;\n\n\t\t}\n\n\t}\n\n}\n\n// Root Container\n\nfunction WebGLUniforms( gl, program ) {\n\n\tthis.seq = [];\n\tthis.map = {};\n\n\tvar n = gl.getProgramParameter( program, 35718 );\n\n\tfor ( var i = 0; i < n; ++ i ) {\n\n\t\tvar info = gl.getActiveUniform( program, i ),\n\t\t\taddr = gl.getUniformLocation( program, info.name );\n\n\t\tparseUniform( info, addr, this );\n\n\t}\n\n}\n\nWebGLUniforms.prototype.setValue = function ( gl, name, value, textures ) {\n\n\tvar u = this.map[ name ];\n\n\tif ( u !== undefined ) u.setValue( gl, value, textures );\n\n};\n\nWebGLUniforms.prototype.setOptional = function ( gl, object, name ) {\n\n\tvar v = object[ name ];\n\n\tif ( v !== undefined ) this.setValue( gl, name, v );\n\n};\n\n\n// Static interface\n\nWebGLUniforms.upload = function ( gl, seq, values, textures ) {\n\n\tfor ( var i = 0, n = seq.length; i !== n; ++ i ) {\n\n\t\tvar u = seq[ i ],\n\t\t\tv = values[ u.id ];\n\n\t\tif ( v.needsUpdate !== false ) {\n\n\t\t\t// note: always updating when .needsUpdate is undefined\n\t\t\tu.setValue( gl, v.value, textures );\n\n\t\t}\n\n\t}\n\n};\n\nWebGLUniforms.seqWithValue = function ( seq, values ) {\n\n\tvar r = [];\n\n\tfor ( var i = 0, n = seq.length; i !== n; ++ i ) {\n\n\t\tvar u = seq[ i ];\n\t\tif ( u.id in values ) r.push( u );\n\n\t}\n\n\treturn r;\n\n};\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction WebGLShader( gl, type, string ) {\n\n\tvar shader = gl.createShader( type );\n\n\tgl.shaderSource( shader, string );\n\tgl.compileShader( shader );\n\n\treturn shader;\n\n}\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nvar programIdCount = 0;\n\nfunction addLineNumbers( string ) {\n\n\tvar lines = string.split( '\\n' );\n\n\tfor ( var i = 0; i < lines.length; i ++ ) {\n\n\t\tlines[ i ] = ( i + 1 ) + ': ' + lines[ i ];\n\n\t}\n\n\treturn lines.join( '\\n' );\n\n}\n\nfunction getEncodingComponents( encoding ) {\n\n\tswitch ( encoding ) {\n\n\t\tcase LinearEncoding:\n\t\t\treturn [ 'Linear', '( value )' ];\n\t\tcase sRGBEncoding:\n\t\t\treturn [ 'sRGB', '( value )' ];\n\t\tcase RGBEEncoding:\n\t\t\treturn [ 'RGBE', '( value )' ];\n\t\tcase RGBM7Encoding:\n\t\t\treturn [ 'RGBM', '( value, 7.0 )' ];\n\t\tcase RGBM16Encoding:\n\t\t\treturn [ 'RGBM', '( value, 16.0 )' ];\n\t\tcase RGBDEncoding:\n\t\t\treturn [ 'RGBD', '( value, 256.0 )' ];\n\t\tcase GammaEncoding:\n\t\t\treturn [ 'Gamma', '( value, float( GAMMA_FACTOR ) )' ];\n\t\tcase LogLuvEncoding:\n\t\t\treturn [ 'LogLuv', '( value )' ];\n\t\tdefault:\n\t\t\tthrow new Error( 'unsupported encoding: ' + encoding );\n\n\t}\n\n}\n\nfunction getShaderErrors( gl, shader, type ) {\n\n\tvar status = gl.getShaderParameter( shader, 35713 );\n\tvar log = gl.getShaderInfoLog( shader ).trim();\n\n\tif ( status && log === '' ) return '';\n\n\t// --enable-privileged-webgl-extension\n\t// console.log( '**' + type + '**', gl.getExtension( 'WEBGL_debug_shaders' ).getTranslatedShaderSource( shader ) );\n\n\tvar source = gl.getShaderSource( shader );\n\n\treturn 'THREE.WebGLShader: gl.getShaderInfoLog() ' + type + '\\n' + log + addLineNumbers( source );\n\n}\n\nfunction getTexelDecodingFunction( functionName, encoding ) {\n\n\tvar components = getEncodingComponents( encoding );\n\treturn 'vec4 ' + functionName + '( vec4 value ) { return ' + components[ 0 ] + 'ToLinear' + components[ 1 ] + '; }';\n\n}\n\nfunction getTexelEncodingFunction( functionName, encoding ) {\n\n\tvar components = getEncodingComponents( encoding );\n\treturn 'vec4 ' + functionName + '( vec4 value ) { return LinearTo' + components[ 0 ] + components[ 1 ] + '; }';\n\n}\n\nfunction getToneMappingFunction( functionName, toneMapping ) {\n\n\tvar toneMappingName;\n\n\tswitch ( toneMapping ) {\n\n\t\tcase LinearToneMapping:\n\t\t\ttoneMappingName = 'Linear';\n\t\t\tbreak;\n\n\t\tcase ReinhardToneMapping:\n\t\t\ttoneMappingName = 'Reinhard';\n\t\t\tbreak;\n\n\t\tcase Uncharted2ToneMapping:\n\t\t\ttoneMappingName = 'Uncharted2';\n\t\t\tbreak;\n\n\t\tcase CineonToneMapping:\n\t\t\ttoneMappingName = 'OptimizedCineon';\n\t\t\tbreak;\n\n\t\tcase ACESFilmicToneMapping:\n\t\t\ttoneMappingName = 'ACESFilmic';\n\t\t\tbreak;\n\n\t\tdefault:\n\t\t\tthrow new Error( 'unsupported toneMapping: ' + toneMapping );\n\n\t}\n\n\treturn 'vec3 ' + functionName + '( vec3 color ) { return ' + toneMappingName + 'ToneMapping( color ); }';\n\n}\n\nfunction generateExtensions( parameters ) {\n\n\tvar chunks = [\n\t\t( parameters.extensionDerivatives || parameters.envMapCubeUV || parameters.bumpMap || parameters.tangentSpaceNormalMap || parameters.clearcoatNormalMap || parameters.flatShading || parameters.shaderID === 'physical' ) ? '#extension GL_OES_standard_derivatives : enable' : '',\n\t\t( parameters.extensionFragDepth || parameters.logarithmicDepthBuffer ) && parameters.rendererExtensionFragDepth ? '#extension GL_EXT_frag_depth : enable' : '',\n\t\t( parameters.extensionDrawBuffers && parameters.rendererExtensionDrawBuffers ) ? '#extension GL_EXT_draw_buffers : require' : '',\n\t\t( parameters.extensionShaderTextureLOD || parameters.envMap ) && parameters.rendererExtensionShaderTextureLod ? '#extension GL_EXT_shader_texture_lod : enable' : ''\n\t];\n\n\treturn chunks.filter( filterEmptyLine ).join( '\\n' );\n\n}\n\nfunction generateDefines( defines ) {\n\n\tvar chunks = [];\n\n\tfor ( var name in defines ) {\n\n\t\tvar value = defines[ name ];\n\n\t\tif ( value === false ) continue;\n\n\t\tchunks.push( '#define ' + name + ' ' + value );\n\n\t}\n\n\treturn chunks.join( '\\n' );\n\n}\n\nfunction fetchAttributeLocations( gl, program ) {\n\n\tvar attributes = {};\n\n\tvar n = gl.getProgramParameter( program, 35721 );\n\n\tfor ( var i = 0; i < n; i ++ ) {\n\n\t\tvar info = gl.getActiveAttrib( program, i );\n\t\tvar name = info.name;\n\n\t\t// console.log( 'THREE.WebGLProgram: ACTIVE VERTEX ATTRIBUTE:', name, i );\n\n\t\tattributes[ name ] = gl.getAttribLocation( program, name );\n\n\t}\n\n\treturn attributes;\n\n}\n\nfunction filterEmptyLine( string ) {\n\n\treturn string !== '';\n\n}\n\nfunction replaceLightNums( string, parameters ) {\n\n\treturn string\n\t\t.replace( /NUM_DIR_LIGHTS/g, parameters.numDirLights )\n\t\t.replace( /NUM_SPOT_LIGHTS/g, parameters.numSpotLights )\n\t\t.replace( /NUM_RECT_AREA_LIGHTS/g, parameters.numRectAreaLights )\n\t\t.replace( /NUM_POINT_LIGHTS/g, parameters.numPointLights )\n\t\t.replace( /NUM_HEMI_LIGHTS/g, parameters.numHemiLights )\n\t\t.replace( /NUM_DIR_LIGHT_SHADOWS/g, parameters.numDirLightShadows )\n\t\t.replace( /NUM_SPOT_LIGHT_SHADOWS/g, parameters.numSpotLightShadows )\n\t\t.replace( /NUM_POINT_LIGHT_SHADOWS/g, parameters.numPointLightShadows );\n\n}\n\nfunction replaceClippingPlaneNums( string, parameters ) {\n\n\treturn string\n\t\t.replace( /NUM_CLIPPING_PLANES/g, parameters.numClippingPlanes )\n\t\t.replace( /UNION_CLIPPING_PLANES/g, ( parameters.numClippingPlanes - parameters.numClipIntersection ) );\n\n}\n\n// Resolve Includes\n\nvar includePattern = /^[ \\t]*#include +<([\\w\\d./]+)>/gm;\n\nfunction resolveIncludes( string ) {\n\n\treturn string.replace( includePattern, includeReplacer );\n\n}\n\nfunction includeReplacer( match, include ) {\n\n\tvar string = ShaderChunk[ include ];\n\n\tif ( string === undefined ) {\n\n\t\tthrow new Error( 'Can not resolve #include <' + include + '>' );\n\n\t}\n\n\treturn resolveIncludes( string );\n\n}\n\n// Unroll Loops\n\nvar loopPattern = /#pragma unroll_loop[\\s]+?for \\( int i \\= (\\d+)\\; i < (\\d+)\\; i \\+\\+ \\) \\{([\\s\\S]+?)(?=\\})\\}/g;\n\nfunction unrollLoops( string ) {\n\n\treturn string.replace( loopPattern, loopReplacer );\n\n}\n\nfunction loopReplacer( match, start, end, snippet ) {\n\n\tvar string = '';\n\n\tfor ( var i = parseInt( start ); i < parseInt( end ); i ++ ) {\n\n\t\tstring += snippet\n\t\t\t.replace( /\\[ i \\]/g, '[ ' + i + ' ]' )\n\t\t\t.replace( /UNROLLED_LOOP_INDEX/g, i );\n\n\t}\n\n\treturn string;\n\n}\n\n//\n\nfunction generatePrecision( parameters ) {\n\n\tvar precisionstring = \"precision \" + parameters.precision + \" float;\\nprecision \" + parameters.precision + \" int;\";\n\n\tif ( parameters.precision === \"highp\" ) {\n\n\t\tprecisionstring += \"\\n#define HIGH_PRECISION\";\n\n\t} else if ( parameters.precision === \"mediump\" ) {\n\n\t\tprecisionstring += \"\\n#define MEDIUM_PRECISION\";\n\n\t} else if ( parameters.precision === \"lowp\" ) {\n\n\t\tprecisionstring += \"\\n#define LOW_PRECISION\";\n\n\t}\n\n\treturn precisionstring;\n\n}\n\nfunction generateShadowMapTypeDefine( parameters ) {\n\n\tvar shadowMapTypeDefine = 'SHADOWMAP_TYPE_BASIC';\n\n\tif ( parameters.shadowMapType === PCFShadowMap ) {\n\n\t\tshadowMapTypeDefine = 'SHADOWMAP_TYPE_PCF';\n\n\t} else if ( parameters.shadowMapType === PCFSoftShadowMap ) {\n\n\t\tshadowMapTypeDefine = 'SHADOWMAP_TYPE_PCF_SOFT';\n\n\t} else if ( parameters.shadowMapType === VSMShadowMap ) {\n\n\t\tshadowMapTypeDefine = 'SHADOWMAP_TYPE_VSM';\n\n\t}\n\n\treturn shadowMapTypeDefine;\n\n}\n\nfunction generateEnvMapTypeDefine( parameters ) {\n\n\tvar envMapTypeDefine = 'ENVMAP_TYPE_CUBE';\n\n\tif ( parameters.envMap ) {\n\n\t\tswitch ( parameters.envMapMode ) {\n\n\t\t\tcase CubeReflectionMapping:\n\t\t\tcase CubeRefractionMapping:\n\t\t\t\tenvMapTypeDefine = 'ENVMAP_TYPE_CUBE';\n\t\t\t\tbreak;\n\n\t\t\tcase CubeUVReflectionMapping:\n\t\t\tcase CubeUVRefractionMapping:\n\t\t\t\tenvMapTypeDefine = 'ENVMAP_TYPE_CUBE_UV';\n\t\t\t\tbreak;\n\n\t\t\tcase EquirectangularReflectionMapping:\n\t\t\tcase EquirectangularRefractionMapping:\n\t\t\t\tenvMapTypeDefine = 'ENVMAP_TYPE_EQUIREC';\n\t\t\t\tbreak;\n\n\t\t\tcase SphericalReflectionMapping:\n\t\t\t\tenvMapTypeDefine = 'ENVMAP_TYPE_SPHERE';\n\t\t\t\tbreak;\n\n\t\t}\n\n\t}\n\n\treturn envMapTypeDefine;\n\n}\n\nfunction generateEnvMapModeDefine( parameters ) {\n\n\tvar envMapModeDefine = 'ENVMAP_MODE_REFLECTION';\n\n\tif ( parameters.envMap ) {\n\n\t\tswitch ( parameters.envMapMode ) {\n\n\t\t\tcase CubeRefractionMapping:\n\t\t\tcase EquirectangularRefractionMapping:\n\t\t\t\tenvMapModeDefine = 'ENVMAP_MODE_REFRACTION';\n\t\t\t\tbreak;\n\n\t\t}\n\n\t}\n\n\treturn envMapModeDefine;\n\n}\n\nfunction generateEnvMapBlendingDefine( parameters ) {\n\n\tvar envMapBlendingDefine = 'ENVMAP_BLENDING_NONE';\n\n\tif ( parameters.envMap ) {\n\n\t\tswitch ( parameters.combine ) {\n\n\t\t\tcase MultiplyOperation:\n\t\t\t\tenvMapBlendingDefine = 'ENVMAP_BLENDING_MULTIPLY';\n\t\t\t\tbreak;\n\n\t\t\tcase MixOperation:\n\t\t\t\tenvMapBlendingDefine = 'ENVMAP_BLENDING_MIX';\n\t\t\t\tbreak;\n\n\t\t\tcase AddOperation:\n\t\t\t\tenvMapBlendingDefine = 'ENVMAP_BLENDING_ADD';\n\t\t\t\tbreak;\n\n\t\t}\n\n\t}\n\n\treturn envMapBlendingDefine;\n\n}\n\nfunction WebGLProgram( renderer, cacheKey, parameters ) {\n\n\tvar gl = renderer.getContext();\n\n\tvar defines = parameters.defines;\n\n\tvar vertexShader = parameters.vertexShader;\n\tvar fragmentShader = parameters.fragmentShader;\n\tvar shadowMapTypeDefine = generateShadowMapTypeDefine( parameters );\n\tvar envMapTypeDefine = generateEnvMapTypeDefine( parameters );\n\tvar envMapModeDefine = generateEnvMapModeDefine( parameters );\n\tvar envMapBlendingDefine = generateEnvMapBlendingDefine( parameters );\n\n\n\tvar gammaFactorDefine = ( renderer.gammaFactor > 0 ) ? renderer.gammaFactor : 1.0;\n\n\tvar customExtensions = parameters.isWebGL2 ? '' : generateExtensions( parameters );\n\n\tvar customDefines = generateDefines( defines );\n\n\tvar program = gl.createProgram();\n\n\tvar prefixVertex, prefixFragment;\n\n\tif ( parameters.isRawShaderMaterial ) {\n\n\t\tprefixVertex = [\n\n\t\t\tcustomDefines\n\n\t\t].filter( filterEmptyLine ).join( '\\n' );\n\n\t\tif ( prefixVertex.length > 0 ) {\n\n\t\t\tprefixVertex += '\\n';\n\n\t\t}\n\n\t\tprefixFragment = [\n\n\t\t\tcustomExtensions,\n\t\t\tcustomDefines\n\n\t\t].filter( filterEmptyLine ).join( '\\n' );\n\n\t\tif ( prefixFragment.length > 0 ) {\n\n\t\t\tprefixFragment += '\\n';\n\n\t\t}\n\n\t} else {\n\n\t\tprefixVertex = [\n\n\t\t\tgeneratePrecision( parameters ),\n\n\t\t\t'#define SHADER_NAME ' + parameters.shaderName,\n\n\t\t\tcustomDefines,\n\n\t\t\tparameters.instancing ? '#define USE_INSTANCING' : '',\n\t\t\tparameters.supportsVertexTextures ? '#define VERTEX_TEXTURES' : '',\n\n\t\t\t'#define GAMMA_FACTOR ' + gammaFactorDefine,\n\n\t\t\t'#define MAX_BONES ' + parameters.maxBones,\n\t\t\t( parameters.useFog && parameters.fog ) ? '#define USE_FOG' : '',\n\t\t\t( parameters.useFog && parameters.fogExp2 ) ? '#define FOG_EXP2' : '',\n\n\t\t\tparameters.map ? '#define USE_MAP' : '',\n\t\t\tparameters.envMap ? '#define USE_ENVMAP' : '',\n\t\t\tparameters.envMap ? '#define ' + envMapModeDefine : '',\n\t\t\tparameters.lightMap ? '#define USE_LIGHTMAP' : '',\n\t\t\tparameters.aoMap ? '#define USE_AOMAP' : '',\n\t\t\tparameters.emissiveMap ? '#define USE_EMISSIVEMAP' : '',\n\t\t\tparameters.bumpMap ? '#define USE_BUMPMAP' : '',\n\t\t\tparameters.normalMap ? '#define USE_NORMALMAP' : '',\n\t\t\t( parameters.normalMap && parameters.objectSpaceNormalMap ) ? '#define OBJECTSPACE_NORMALMAP' : '',\n\t\t\t( parameters.normalMap && parameters.tangentSpaceNormalMap ) ? '#define TANGENTSPACE_NORMALMAP' : '',\n\n\t\t\tparameters.clearcoatNormalMap ? '#define USE_CLEARCOAT_NORMALMAP' : '',\n\t\t\tparameters.displacementMap && parameters.supportsVertexTextures ? '#define USE_DISPLACEMENTMAP' : '',\n\t\t\tparameters.specularMap ? '#define USE_SPECULARMAP' : '',\n\t\t\tparameters.roughnessMap ? '#define USE_ROUGHNESSMAP' : '',\n\t\t\tparameters.metalnessMap ? '#define USE_METALNESSMAP' : '',\n\t\t\tparameters.alphaMap ? '#define USE_ALPHAMAP' : '',\n\n\t\t\tparameters.vertexTangents ? '#define USE_TANGENT' : '',\n\t\t\tparameters.vertexColors ? '#define USE_COLOR' : '',\n\t\t\tparameters.vertexUvs ? '#define USE_UV' : '',\n\t\t\tparameters.uvsVertexOnly ? '#define UVS_VERTEX_ONLY' : '',\n\n\t\t\tparameters.flatShading ? '#define FLAT_SHADED' : '',\n\n\t\t\tparameters.skinning ? '#define USE_SKINNING' : '',\n\t\t\tparameters.useVertexTexture ? '#define BONE_TEXTURE' : '',\n\n\t\t\tparameters.morphTargets ? '#define USE_MORPHTARGETS' : '',\n\t\t\tparameters.morphNormals && parameters.flatShading === false ? '#define USE_MORPHNORMALS' : '',\n\t\t\tparameters.doubleSided ? '#define DOUBLE_SIDED' : '',\n\t\t\tparameters.flipSided ? '#define FLIP_SIDED' : '',\n\n\t\t\tparameters.shadowMapEnabled ? '#define USE_SHADOWMAP' : '',\n\t\t\tparameters.shadowMapEnabled ? '#define ' + shadowMapTypeDefine : '',\n\n\t\t\tparameters.sizeAttenuation ? '#define USE_SIZEATTENUATION' : '',\n\n\t\t\tparameters.logarithmicDepthBuffer ? '#define USE_LOGDEPTHBUF' : '',\n\t\t\t( parameters.logarithmicDepthBuffer && parameters.rendererExtensionFragDepth ) ? '#define USE_LOGDEPTHBUF_EXT' : '',\n\n\t\t\t'uniform mat4 modelMatrix;',\n\t\t\t'uniform mat4 modelViewMatrix;',\n\t\t\t'uniform mat4 projectionMatrix;',\n\t\t\t'uniform mat4 viewMatrix;',\n\t\t\t'uniform mat3 normalMatrix;',\n\t\t\t'uniform vec3 cameraPosition;',\n\t\t\t'uniform bool isOrthographic;',\n\n\t\t\t'#ifdef USE_INSTANCING',\n\n\t\t\t' attribute mat4 instanceMatrix;',\n\n\t\t\t'#endif',\n\n\t\t\t'attribute vec3 position;',\n\t\t\t'attribute vec3 normal;',\n\t\t\t'attribute vec2 uv;',\n\n\t\t\t'#ifdef USE_TANGENT',\n\n\t\t\t'\tattribute vec4 tangent;',\n\n\t\t\t'#endif',\n\n\t\t\t'#ifdef USE_COLOR',\n\n\t\t\t'\tattribute vec3 color;',\n\n\t\t\t'#endif',\n\n\t\t\t'#ifdef USE_MORPHTARGETS',\n\n\t\t\t'\tattribute vec3 morphTarget0;',\n\t\t\t'\tattribute vec3 morphTarget1;',\n\t\t\t'\tattribute vec3 morphTarget2;',\n\t\t\t'\tattribute vec3 morphTarget3;',\n\n\t\t\t'\t#ifdef USE_MORPHNORMALS',\n\n\t\t\t'\t\tattribute vec3 morphNormal0;',\n\t\t\t'\t\tattribute vec3 morphNormal1;',\n\t\t\t'\t\tattribute vec3 morphNormal2;',\n\t\t\t'\t\tattribute vec3 morphNormal3;',\n\n\t\t\t'\t#else',\n\n\t\t\t'\t\tattribute vec3 morphTarget4;',\n\t\t\t'\t\tattribute vec3 morphTarget5;',\n\t\t\t'\t\tattribute vec3 morphTarget6;',\n\t\t\t'\t\tattribute vec3 morphTarget7;',\n\n\t\t\t'\t#endif',\n\n\t\t\t'#endif',\n\n\t\t\t'#ifdef USE_SKINNING',\n\n\t\t\t'\tattribute vec4 skinIndex;',\n\t\t\t'\tattribute vec4 skinWeight;',\n\n\t\t\t'#endif',\n\n\t\t\t'\\n'\n\n\t\t].filter( filterEmptyLine ).join( '\\n' );\n\n\t\tprefixFragment = [\n\n\t\t\tcustomExtensions,\n\n\t\t\tgeneratePrecision( parameters ),\n\n\t\t\t'#define SHADER_NAME ' + parameters.shaderName,\n\n\t\t\tcustomDefines,\n\n\t\t\tparameters.alphaTest ? '#define ALPHATEST ' + parameters.alphaTest + ( parameters.alphaTest % 1 ? '' : '.0' ) : '', // add '.0' if integer\n\n\t\t\t'#define GAMMA_FACTOR ' + gammaFactorDefine,\n\n\t\t\t( parameters.useFog && parameters.fog ) ? '#define USE_FOG' : '',\n\t\t\t( parameters.useFog && parameters.fogExp2 ) ? '#define FOG_EXP2' : '',\n\n\t\t\tparameters.map ? '#define USE_MAP' : '',\n\t\t\tparameters.matcap ? '#define USE_MATCAP' : '',\n\t\t\tparameters.envMap ? '#define USE_ENVMAP' : '',\n\t\t\tparameters.envMap ? '#define ' + envMapTypeDefine : '',\n\t\t\tparameters.envMap ? '#define ' + envMapModeDefine : '',\n\t\t\tparameters.envMap ? '#define ' + envMapBlendingDefine : '',\n\t\t\tparameters.lightMap ? '#define USE_LIGHTMAP' : '',\n\t\t\tparameters.aoMap ? '#define USE_AOMAP' : '',\n\t\t\tparameters.emissiveMap ? '#define USE_EMISSIVEMAP' : '',\n\t\t\tparameters.bumpMap ? '#define USE_BUMPMAP' : '',\n\t\t\tparameters.normalMap ? '#define USE_NORMALMAP' : '',\n\t\t\t( parameters.normalMap && parameters.objectSpaceNormalMap ) ? '#define OBJECTSPACE_NORMALMAP' : '',\n\t\t\t( parameters.normalMap && parameters.tangentSpaceNormalMap ) ? '#define TANGENTSPACE_NORMALMAP' : '',\n\t\t\tparameters.clearcoatNormalMap ? '#define USE_CLEARCOAT_NORMALMAP' : '',\n\t\t\tparameters.specularMap ? '#define USE_SPECULARMAP' : '',\n\t\t\tparameters.roughnessMap ? '#define USE_ROUGHNESSMAP' : '',\n\t\t\tparameters.metalnessMap ? '#define USE_METALNESSMAP' : '',\n\t\t\tparameters.alphaMap ? '#define USE_ALPHAMAP' : '',\n\n\t\t\tparameters.sheen ? '#define USE_SHEEN' : '',\n\n\t\t\tparameters.vertexTangents ? '#define USE_TANGENT' : '',\n\t\t\tparameters.vertexColors ? '#define USE_COLOR' : '',\n\t\t\tparameters.vertexUvs ? '#define USE_UV' : '',\n\t\t\tparameters.uvsVertexOnly ? '#define UVS_VERTEX_ONLY' : '',\n\n\t\t\tparameters.gradientMap ? '#define USE_GRADIENTMAP' : '',\n\n\t\t\tparameters.flatShading ? '#define FLAT_SHADED' : '',\n\n\t\t\tparameters.doubleSided ? '#define DOUBLE_SIDED' : '',\n\t\t\tparameters.flipSided ? '#define FLIP_SIDED' : '',\n\n\t\t\tparameters.shadowMapEnabled ? '#define USE_SHADOWMAP' : '',\n\t\t\tparameters.shadowMapEnabled ? '#define ' + shadowMapTypeDefine : '',\n\n\t\t\tparameters.premultipliedAlpha ? '#define PREMULTIPLIED_ALPHA' : '',\n\n\t\t\tparameters.physicallyCorrectLights ? '#define PHYSICALLY_CORRECT_LIGHTS' : '',\n\n\t\t\tparameters.logarithmicDepthBuffer ? '#define USE_LOGDEPTHBUF' : '',\n\t\t\t( parameters.logarithmicDepthBuffer && parameters.rendererExtensionFragDepth ) ? '#define USE_LOGDEPTHBUF_EXT' : '',\n\n\t\t\t( ( parameters.extensionShaderTextureLOD || parameters.envMap ) && parameters.rendererExtensionShaderTextureLod ) ? '#define TEXTURE_LOD_EXT' : '',\n\n\t\t\t'uniform mat4 viewMatrix;',\n\t\t\t'uniform vec3 cameraPosition;',\n\t\t\t'uniform bool isOrthographic;',\n\n\t\t\t( parameters.toneMapping !== NoToneMapping ) ? '#define TONE_MAPPING' : '',\n\t\t\t( parameters.toneMapping !== NoToneMapping ) ? ShaderChunk[ 'tonemapping_pars_fragment' ] : '', // this code is required here because it is used by the toneMapping() function defined below\n\t\t\t( parameters.toneMapping !== NoToneMapping ) ? getToneMappingFunction( 'toneMapping', parameters.toneMapping ) : '',\n\n\t\t\tparameters.dithering ? '#define DITHERING' : '',\n\n\t\t\t( parameters.outputEncoding || parameters.mapEncoding || parameters.matcapEncoding || parameters.envMapEncoding || parameters.emissiveMapEncoding || parameters.lightMapEncoding ) ?\n\t\t\t\tShaderChunk[ 'encodings_pars_fragment' ] : '', // this code is required here because it is used by the various encoding/decoding function defined below\n\t\t\tparameters.mapEncoding ? getTexelDecodingFunction( 'mapTexelToLinear', parameters.mapEncoding ) : '',\n\t\t\tparameters.matcapEncoding ? getTexelDecodingFunction( 'matcapTexelToLinear', parameters.matcapEncoding ) : '',\n\t\t\tparameters.envMapEncoding ? getTexelDecodingFunction( 'envMapTexelToLinear', parameters.envMapEncoding ) : '',\n\t\t\tparameters.emissiveMapEncoding ? getTexelDecodingFunction( 'emissiveMapTexelToLinear', parameters.emissiveMapEncoding ) : '',\n\t\t\tparameters.lightMapEncoding ? getTexelDecodingFunction( 'lightMapTexelToLinear', parameters.lightMapEncoding ) : '',\n\t\t\tparameters.outputEncoding ? getTexelEncodingFunction( 'linearToOutputTexel', parameters.outputEncoding ) : '',\n\n\t\t\tparameters.depthPacking ? '#define DEPTH_PACKING ' + parameters.depthPacking : '',\n\n\t\t\t'\\n'\n\n\t\t].filter( filterEmptyLine ).join( '\\n' );\n\n\t}\n\n\tvertexShader = resolveIncludes( vertexShader );\n\tvertexShader = replaceLightNums( vertexShader, parameters );\n\tvertexShader = replaceClippingPlaneNums( vertexShader, parameters );\n\n\tfragmentShader = resolveIncludes( fragmentShader );\n\tfragmentShader = replaceLightNums( fragmentShader, parameters );\n\tfragmentShader = replaceClippingPlaneNums( fragmentShader, parameters );\n\n\tvertexShader = unrollLoops( vertexShader );\n\tfragmentShader = unrollLoops( fragmentShader );\n\n\tif ( parameters.isWebGL2 && ! parameters.isRawShaderMaterial ) {\n\n\t\tvar isGLSL3ShaderMaterial = false;\n\n\t\tvar versionRegex = /^\\s*#version\\s+300\\s+es\\s*\\n/;\n\n\t\tif ( parameters.isShaderMaterial &&\n\t\t\tvertexShader.match( versionRegex ) !== null &&\n\t\t\tfragmentShader.match( versionRegex ) !== null ) {\n\n\t\t\tisGLSL3ShaderMaterial = true;\n\n\t\t\tvertexShader = vertexShader.replace( versionRegex, '' );\n\t\t\tfragmentShader = fragmentShader.replace( versionRegex, '' );\n\n\t\t}\n\n\t\t// GLSL 3.0 conversion\n\n\t\tprefixVertex = [\n\t\t\t'#version 300 es\\n',\n\t\t\t'#define attribute in',\n\t\t\t'#define varying out',\n\t\t\t'#define texture2D texture'\n\t\t].join( '\\n' ) + '\\n' + prefixVertex;\n\n\t\tprefixFragment = [\n\t\t\t'#version 300 es\\n',\n\t\t\t'#define varying in',\n\t\t\tisGLSL3ShaderMaterial ? '' : 'out highp vec4 pc_fragColor;',\n\t\t\tisGLSL3ShaderMaterial ? '' : '#define gl_FragColor pc_fragColor',\n\t\t\t'#define gl_FragDepthEXT gl_FragDepth',\n\t\t\t'#define texture2D texture',\n\t\t\t'#define textureCube texture',\n\t\t\t'#define texture2DProj textureProj',\n\t\t\t'#define texture2DLodEXT textureLod',\n\t\t\t'#define texture2DProjLodEXT textureProjLod',\n\t\t\t'#define textureCubeLodEXT textureLod',\n\t\t\t'#define texture2DGradEXT textureGrad',\n\t\t\t'#define texture2DProjGradEXT textureProjGrad',\n\t\t\t'#define textureCubeGradEXT textureGrad'\n\t\t].join( '\\n' ) + '\\n' + prefixFragment;\n\n\t}\n\n\tvar vertexGlsl = prefixVertex + vertexShader;\n\tvar fragmentGlsl = prefixFragment + fragmentShader;\n\n\t// console.log( '*VERTEX*', vertexGlsl );\n\t// console.log( '*FRAGMENT*', fragmentGlsl );\n\n\tvar glVertexShader = WebGLShader( gl, 35633, vertexGlsl );\n\tvar glFragmentShader = WebGLShader( gl, 35632, fragmentGlsl );\n\n\tgl.attachShader( program, glVertexShader );\n\tgl.attachShader( program, glFragmentShader );\n\n\t// Force a particular attribute to index 0.\n\n\tif ( parameters.index0AttributeName !== undefined ) {\n\n\t\tgl.bindAttribLocation( program, 0, parameters.index0AttributeName );\n\n\t} else if ( parameters.morphTargets === true ) {\n\n\t\t// programs with morphTargets displace position out of attribute 0\n\t\tgl.bindAttribLocation( program, 0, 'position' );\n\n\t}\n\n\tgl.linkProgram( program );\n\n\t// check for link errors\n\tif ( renderer.debug.checkShaderErrors ) {\n\n\t\tvar programLog = gl.getProgramInfoLog( program ).trim();\n\t\tvar vertexLog = gl.getShaderInfoLog( glVertexShader ).trim();\n\t\tvar fragmentLog = gl.getShaderInfoLog( glFragmentShader ).trim();\n\n\t\tvar runnable = true;\n\t\tvar haveDiagnostics = true;\n\n\t\tif ( gl.getProgramParameter( program, 35714 ) === false ) {\n\n\t\t\trunnable = false;\n\n\t\t\tvar vertexErrors = getShaderErrors( gl, glVertexShader, 'vertex' );\n\t\t\tvar fragmentErrors = getShaderErrors( gl, glFragmentShader, 'fragment' );\n\n\t\t\tconsole.error( 'THREE.WebGLProgram: shader error: ', gl.getError(), '35715', gl.getProgramParameter( program, 35715 ), 'gl.getProgramInfoLog', programLog, vertexErrors, fragmentErrors );\n\n\t\t} else if ( programLog !== '' ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLProgram: gl.getProgramInfoLog()', programLog );\n\n\t\t} else if ( vertexLog === '' || fragmentLog === '' ) {\n\n\t\t\thaveDiagnostics = false;\n\n\t\t}\n\n\t\tif ( haveDiagnostics ) {\n\n\t\t\tthis.diagnostics = {\n\n\t\t\t\trunnable: runnable,\n\n\t\t\t\tprogramLog: programLog,\n\n\t\t\t\tvertexShader: {\n\n\t\t\t\t\tlog: vertexLog,\n\t\t\t\t\tprefix: prefixVertex\n\n\t\t\t\t},\n\n\t\t\t\tfragmentShader: {\n\n\t\t\t\t\tlog: fragmentLog,\n\t\t\t\t\tprefix: prefixFragment\n\n\t\t\t\t}\n\n\t\t\t};\n\n\t\t}\n\n\t}\n\n\t// clean up\n\n\tgl.detachShader( program, glVertexShader );\n\tgl.detachShader( program, glFragmentShader );\n\n\tgl.deleteShader( glVertexShader );\n\tgl.deleteShader( glFragmentShader );\n\n\t// set up caching for uniform locations\n\n\tvar cachedUniforms;\n\n\tthis.getUniforms = function () {\n\n\t\tif ( cachedUniforms === undefined ) {\n\n\t\t\tcachedUniforms = new WebGLUniforms( gl, program );\n\n\t\t}\n\n\t\treturn cachedUniforms;\n\n\t};\n\n\t// set up caching for attribute locations\n\n\tvar cachedAttributes;\n\n\tthis.getAttributes = function () {\n\n\t\tif ( cachedAttributes === undefined ) {\n\n\t\t\tcachedAttributes = fetchAttributeLocations( gl, program );\n\n\t\t}\n\n\t\treturn cachedAttributes;\n\n\t};\n\n\t// free resource\n\n\tthis.destroy = function () {\n\n\t\tgl.deleteProgram( program );\n\t\tthis.program = undefined;\n\n\t};\n\n\t//\n\n\tthis.name = parameters.shaderName;\n\tthis.id = programIdCount ++;\n\tthis.cacheKey = cacheKey;\n\tthis.usedTimes = 1;\n\tthis.program = program;\n\tthis.vertexShader = glVertexShader;\n\tthis.fragmentShader = glFragmentShader;\n\n\treturn this;\n\n}\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction WebGLPrograms( renderer, extensions, capabilities ) {\n\n\tvar programs = [];\n\n\tvar isWebGL2 = capabilities.isWebGL2;\n\tvar logarithmicDepthBuffer = capabilities.logarithmicDepthBuffer;\n\tvar floatVertexTextures = capabilities.floatVertexTextures;\n\tvar precision = capabilities.precision;\n\tvar maxVertexUniforms = capabilities.maxVertexUniforms;\n\tvar vertexTextures = capabilities.vertexTextures;\n\n\tvar shaderIDs = {\n\t\tMeshDepthMaterial: 'depth',\n\t\tMeshDistanceMaterial: 'distanceRGBA',\n\t\tMeshNormalMaterial: 'normal',\n\t\tMeshBasicMaterial: 'basic',\n\t\tMeshLambertMaterial: 'lambert',\n\t\tMeshPhongMaterial: 'phong',\n\t\tMeshToonMaterial: 'toon',\n\t\tMeshStandardMaterial: 'physical',\n\t\tMeshPhysicalMaterial: 'physical',\n\t\tMeshMatcapMaterial: 'matcap',\n\t\tLineBasicMaterial: 'basic',\n\t\tLineDashedMaterial: 'dashed',\n\t\tPointsMaterial: 'points',\n\t\tShadowMaterial: 'shadow',\n\t\tSpriteMaterial: 'sprite'\n\t};\n\n\tvar parameterNames = [\n\t\t\"precision\", \"isWebGL2\", \"supportsVertexTextures\", \"outputEncoding\", \"instancing\",\n\t\t\"map\", \"mapEncoding\", \"matcap\", \"matcapEncoding\", \"envMap\", \"envMapMode\", \"envMapEncoding\", \"envMapCubeUV\",\n\t\t\"lightMap\", \"lightMapEncoding\", \"aoMap\", \"emissiveMap\", \"emissiveMapEncoding\", \"bumpMap\", \"normalMap\", \"objectSpaceNormalMap\", \"tangentSpaceNormalMap\", \"clearcoatNormalMap\", \"displacementMap\", \"specularMap\",\n\t\t\"roughnessMap\", \"metalnessMap\", \"gradientMap\",\n\t\t\"alphaMap\", \"combine\", \"vertexColors\", \"vertexTangents\", \"vertexUvs\", \"uvsVertexOnly\", \"fog\", \"useFog\", \"fogExp2\",\n\t\t\"flatShading\", \"sizeAttenuation\", \"logarithmicDepthBuffer\", \"skinning\",\n\t\t\"maxBones\", \"useVertexTexture\", \"morphTargets\", \"morphNormals\",\n\t\t\"maxMorphTargets\", \"maxMorphNormals\", \"premultipliedAlpha\",\n\t\t\"numDirLights\", \"numPointLights\", \"numSpotLights\", \"numHemiLights\", \"numRectAreaLights\",\n\t\t\"numDirLightShadows\", \"numPointLightShadows\", \"numSpotLightShadows\",\n\t\t\"shadowMapEnabled\", \"shadowMapType\", \"toneMapping\", 'physicallyCorrectLights',\n\t\t\"alphaTest\", \"doubleSided\", \"flipSided\", \"numClippingPlanes\", \"numClipIntersection\", \"depthPacking\", \"dithering\",\n\t\t\"sheen\"\n\t];\n\n\tfunction getShaderObject( material, shaderID ) {\n\n\t\tvar shaderobject;\n\n\t\tif ( shaderID ) {\n\n\t\t\tvar shader = ShaderLib[ shaderID ];\n\n\t\t\tshaderobject = {\n\t\t\t\tname: material.type,\n\t\t\t\tuniforms: UniformsUtils.clone( shader.uniforms ),\n\t\t\t\tvertexShader: shader.vertexShader,\n\t\t\t\tfragmentShader: shader.fragmentShader\n\t\t\t};\n\n\t\t} else {\n\n\t\t\tshaderobject = {\n\t\t\t\tname: material.type,\n\t\t\t\tuniforms: material.uniforms,\n\t\t\t\tvertexShader: material.vertexShader,\n\t\t\t\tfragmentShader: material.fragmentShader\n\t\t\t};\n\n\t\t}\n\n\t\treturn shaderobject;\n\n\t}\n\n\tfunction allocateBones( object ) {\n\n\t\tvar skeleton = object.skeleton;\n\t\tvar bones = skeleton.bones;\n\n\t\tif ( floatVertexTextures ) {\n\n\t\t\treturn 1024;\n\n\t\t} else {\n\n\t\t\t// default for when object is not specified\n\t\t\t// ( for example when prebuilding shader to be used with multiple objects )\n\t\t\t//\n\t\t\t//  - leave some extra space for other uniforms\n\t\t\t//  - limit here is ANGLE's 254 max uniform vectors\n\t\t\t//    (up to 54 should be safe)\n\n\t\t\tvar nVertexUniforms = maxVertexUniforms;\n\t\t\tvar nVertexMatrices = Math.floor( ( nVertexUniforms - 20 ) / 4 );\n\n\t\t\tvar maxBones = Math.min( nVertexMatrices, bones.length );\n\n\t\t\tif ( maxBones < bones.length ) {\n\n\t\t\t\tconsole.warn( 'THREE.WebGLRenderer: Skeleton has ' + bones.length + ' bones. This GPU supports ' + maxBones + '.' );\n\t\t\t\treturn 0;\n\n\t\t\t}\n\n\t\t\treturn maxBones;\n\n\t\t}\n\n\t}\n\n\tfunction getTextureEncodingFromMap( map ) {\n\n\t\tvar encoding;\n\n\t\tif ( ! map ) {\n\n\t\t\tencoding = LinearEncoding;\n\n\t\t} else if ( map.isTexture ) {\n\n\t\t\tencoding = map.encoding;\n\n\t\t} else if ( map.isWebGLRenderTarget ) {\n\n\t\t\tconsole.warn( \"THREE.WebGLPrograms.getTextureEncodingFromMap: don't use render targets as textures. Use their .texture property instead.\" );\n\t\t\tencoding = map.texture.encoding;\n\n\t\t}\n\n\t\treturn encoding;\n\n\t}\n\n\tthis.getParameters = function ( material, lights, shadows, scene, nClipPlanes, nClipIntersection, object ) {\n\n\t\tvar fog = scene.fog;\n\t\tvar environment = material.isMeshStandardMaterial ? scene.environment : null;\n\n\t\tvar envMap = material.envMap || environment;\n\n\t\tvar shaderID = shaderIDs[ material.type ];\n\n\t\t// heuristics to create shader parameters according to lights in the scene\n\t\t// (not to blow over maxLights budget)\n\n\t\tvar maxBones = object.isSkinnedMesh ? allocateBones( object ) : 0;\n\n\t\tif ( material.precision !== null ) {\n\n\t\t\tprecision = capabilities.getMaxPrecision( material.precision );\n\n\t\t\tif ( precision !== material.precision ) {\n\n\t\t\t\tconsole.warn( 'THREE.WebGLProgram.getParameters:', material.precision, 'not supported, using', precision, 'instead.' );\n\n\t\t\t}\n\n\t\t}\n\n\t\tvar shaderobject = getShaderObject( material, shaderID );\n\t\tmaterial.onBeforeCompile( shaderobject, renderer );\n\n\t\tvar currentRenderTarget = renderer.getRenderTarget();\n\n\t\tvar parameters = {\n\n\t\t\tisWebGL2: isWebGL2,\n\n\t\t\tshaderID: shaderID,\n\t\t\tshaderName: shaderobject.name,\n\n\t\t\tuniforms: shaderobject.uniforms,\n\t\t\tvertexShader: shaderobject.vertexShader,\n\t\t\tfragmentShader: shaderobject.fragmentShader,\n\t\t\tdefines: material.defines,\n\n\t\t\tisRawShaderMaterial: material.isRawShaderMaterial,\n\t\t\tisShaderMaterial: material.isShaderMaterial,\n\n\t\t\tprecision: precision,\n\n\t\t\tinstancing: object.isInstancedMesh === true,\n\n\t\t\tsupportsVertexTextures: vertexTextures,\n\t\t\toutputEncoding: ( currentRenderTarget !== null ) ? getTextureEncodingFromMap( currentRenderTarget.texture ) : renderer.outputEncoding,\n\t\t\tmap: !! material.map,\n\t\t\tmapEncoding: getTextureEncodingFromMap( material.map ),\n\t\t\tmatcap: !! material.matcap,\n\t\t\tmatcapEncoding: getTextureEncodingFromMap( material.matcap ),\n\t\t\tenvMap: !! envMap,\n\t\t\tenvMapMode: envMap && envMap.mapping,\n\t\t\tenvMapEncoding: getTextureEncodingFromMap( envMap ),\n\t\t\tenvMapCubeUV: ( !! envMap ) && ( ( envMap.mapping === CubeUVReflectionMapping ) || ( envMap.mapping === CubeUVRefractionMapping ) ),\n\t\t\tlightMap: !! material.lightMap,\n\t\t\tlightMapEncoding: getTextureEncodingFromMap( material.lightMap ),\n\t\t\taoMap: !! material.aoMap,\n\t\t\temissiveMap: !! material.emissiveMap,\n\t\t\temissiveMapEncoding: getTextureEncodingFromMap( material.emissiveMap ),\n\t\t\tbumpMap: !! material.bumpMap,\n\t\t\tnormalMap: !! material.normalMap,\n\t\t\tobjectSpaceNormalMap: material.normalMapType === ObjectSpaceNormalMap,\n\t\t\ttangentSpaceNormalMap: material.normalMapType === TangentSpaceNormalMap,\n\t\t\tclearcoatNormalMap: !! material.clearcoatNormalMap,\n\t\t\tdisplacementMap: !! material.displacementMap,\n\t\t\troughnessMap: !! material.roughnessMap,\n\t\t\tmetalnessMap: !! material.metalnessMap,\n\t\t\tspecularMap: !! material.specularMap,\n\t\t\talphaMap: !! material.alphaMap,\n\n\t\t\tgradientMap: !! material.gradientMap,\n\n\t\t\tsheen: !! material.sheen,\n\n\t\t\tcombine: material.combine,\n\n\t\t\tvertexTangents: ( material.normalMap && material.vertexTangents ),\n\t\t\tvertexColors: material.vertexColors,\n\t\t\tvertexUvs: !! material.map || !! material.bumpMap || !! material.normalMap || !! material.specularMap || !! material.alphaMap || !! material.emissiveMap || !! material.roughnessMap || !! material.metalnessMap || !! material.clearcoatNormalMap || !! material.displacementMap,\n\t\t\tuvsVertexOnly: ! ( !! material.map || !! material.bumpMap || !! material.normalMap || !! material.specularMap || !! material.alphaMap || !! material.emissiveMap || !! material.roughnessMap || !! material.metalnessMap || !! material.clearcoatNormalMap ) && !! material.displacementMap,\n\n\t\t\tfog: !! fog,\n\t\t\tuseFog: material.fog,\n\t\t\tfogExp2: ( fog && fog.isFogExp2 ),\n\n\t\t\tflatShading: material.flatShading,\n\n\t\t\tsizeAttenuation: material.sizeAttenuation,\n\t\t\tlogarithmicDepthBuffer: logarithmicDepthBuffer,\n\n\t\t\tskinning: material.skinning && maxBones > 0,\n\t\t\tmaxBones: maxBones,\n\t\t\tuseVertexTexture: floatVertexTextures,\n\n\t\t\tmorphTargets: material.morphTargets,\n\t\t\tmorphNormals: material.morphNormals,\n\t\t\tmaxMorphTargets: renderer.maxMorphTargets,\n\t\t\tmaxMorphNormals: renderer.maxMorphNormals,\n\n\t\t\tnumDirLights: lights.directional.length,\n\t\t\tnumPointLights: lights.point.length,\n\t\t\tnumSpotLights: lights.spot.length,\n\t\t\tnumRectAreaLights: lights.rectArea.length,\n\t\t\tnumHemiLights: lights.hemi.length,\n\n\t\t\tnumDirLightShadows: lights.directionalShadowMap.length,\n\t\t\tnumPointLightShadows: lights.pointShadowMap.length,\n\t\t\tnumSpotLightShadows: lights.spotShadowMap.length,\n\n\t\t\tnumClippingPlanes: nClipPlanes,\n\t\t\tnumClipIntersection: nClipIntersection,\n\n\t\t\tdithering: material.dithering,\n\n\t\t\tshadowMapEnabled: renderer.shadowMap.enabled && shadows.length > 0,\n\t\t\tshadowMapType: renderer.shadowMap.type,\n\n\t\t\ttoneMapping: material.toneMapped ? renderer.toneMapping : NoToneMapping,\n\t\t\tphysicallyCorrectLights: renderer.physicallyCorrectLights,\n\n\t\t\tpremultipliedAlpha: material.premultipliedAlpha,\n\n\t\t\talphaTest: material.alphaTest,\n\t\t\tdoubleSided: material.side === DoubleSide,\n\t\t\tflipSided: material.side === BackSide,\n\n\t\t\tdepthPacking: ( material.depthPacking !== undefined ) ? material.depthPacking : false,\n\n\t\t\tindex0AttributeName: material.index0AttributeName,\n\n\t\t\textensionDerivatives: material.extensions && material.extensions.derivatives,\n\t\t\textensionFragDepth: material.extensions && material.extensions.fragDepth,\n\t\t\textensionDrawbuffers: material.extensions && material.extensions.drawBuffers,\n\t\t\textensionShaderTextureLOD: material.extensions && material.extensions.shaderTextureLOD,\n\n\t\t\trendererExtensionFragDepth: isWebGL2 || extensions.get( 'EXT_frag_depth' ) !== null,\n\t\t\trendererExtensionDrawBuffers: isWebGL2 || extensions.get( 'WEBGL_draw_buffers' ) !== null,\n\t\t\trendererExtensionShaderTextureLod: isWebGL2 || extensions.get( 'EXT_shader_texture_lod' ) !== null,\n\n\t\t\tonBeforeCompile: material.onBeforeCompile\n\n\t\t};\n\n\t\treturn parameters;\n\n\t};\n\n\tthis.getProgramCacheKey = function ( parameters ) {\n\n\t\tvar array = [];\n\n\t\tif ( parameters.shaderID ) {\n\n\t\t\tarray.push( parameters.shaderID );\n\n\t\t} else {\n\n\t\t\tarray.push( parameters.fragmentShader );\n\t\t\tarray.push( parameters.vertexShader );\n\n\t\t}\n\n\t\tif ( parameters.defines !== undefined ) {\n\n\t\t\tfor ( var name in parameters.defines ) {\n\n\t\t\t\tarray.push( name );\n\t\t\t\tarray.push( parameters.defines[ name ] );\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( parameters.isRawShaderMaterial === undefined ) {\n\n\t\t\tfor ( var i = 0; i < parameterNames.length; i ++ ) {\n\n\t\t\t\tarray.push( parameters[ parameterNames[ i ] ] );\n\n\t\t\t}\n\n\t\t\tarray.push( renderer.outputEncoding );\n\t\t\tarray.push( renderer.gammaFactor );\n\n\t\t}\n\n\t\tarray.push( parameters.onBeforeCompile.toString() );\n\n\t\treturn array.join();\n\n\t};\n\n\tthis.acquireProgram = function ( parameters, cacheKey ) {\n\n\t\tvar program;\n\n\t\t// Check if code has been already compiled\n\t\tfor ( var p = 0, pl = programs.length; p < pl; p ++ ) {\n\n\t\t\tvar preexistingProgram = programs[ p ];\n\n\t\t\tif ( preexistingProgram.cacheKey === cacheKey ) {\n\n\t\t\t\tprogram = preexistingProgram;\n\t\t\t\t++ program.usedTimes;\n\n\t\t\t\tbreak;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( program === undefined ) {\n\n\t\t\tprogram = new WebGLProgram( renderer, cacheKey, parameters );\n\t\t\tprograms.push( program );\n\n\t\t}\n\n\t\treturn program;\n\n\t};\n\n\tthis.releaseProgram = function ( program ) {\n\n\t\tif ( -- program.usedTimes === 0 ) {\n\n\t\t\t// Remove from unordered set\n\t\t\tvar i = programs.indexOf( program );\n\t\t\tprograms[ i ] = programs[ programs.length - 1 ];\n\t\t\tprograms.pop();\n\n\t\t\t// Free WebGL resources\n\t\t\tprogram.destroy();\n\n\t\t}\n\n\t};\n\n\t// Exposed for resource monitoring & error feedback via renderer.info:\n\tthis.programs = programs;\n\n}\n\n/**\n * @author fordacious / fordacious.github.io\n */\n\nfunction WebGLProperties() {\n\n\tvar properties = new WeakMap();\n\n\tfunction get( object ) {\n\n\t\tvar map = properties.get( object );\n\n\t\tif ( map === undefined ) {\n\n\t\t\tmap = {};\n\t\t\tproperties.set( object, map );\n\n\t\t}\n\n\t\treturn map;\n\n\t}\n\n\tfunction remove( object ) {\n\n\t\tproperties.delete( object );\n\n\t}\n\n\tfunction update( object, key, value ) {\n\n\t\tproperties.get( object )[ key ] = value;\n\n\t}\n\n\tfunction dispose() {\n\n\t\tproperties = new WeakMap();\n\n\t}\n\n\treturn {\n\t\tget: get,\n\t\tremove: remove,\n\t\tupdate: update,\n\t\tdispose: dispose\n\t};\n\n}\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction painterSortStable( a, b ) {\n\n\tif ( a.groupOrder !== b.groupOrder ) {\n\n\t\treturn a.groupOrder - b.groupOrder;\n\n\t} else if ( a.renderOrder !== b.renderOrder ) {\n\n\t\treturn a.renderOrder - b.renderOrder;\n\n\t} else if ( a.program !== b.program ) {\n\n\t\treturn a.program.id - b.program.id;\n\n\t} else if ( a.material.id !== b.material.id ) {\n\n\t\treturn a.material.id - b.material.id;\n\n\t} else if ( a.z !== b.z ) {\n\n\t\treturn a.z - b.z;\n\n\t} else {\n\n\t\treturn a.id - b.id;\n\n\t}\n\n}\n\nfunction reversePainterSortStable( a, b ) {\n\n\tif ( a.groupOrder !== b.groupOrder ) {\n\n\t\treturn a.groupOrder - b.groupOrder;\n\n\t} else if ( a.renderOrder !== b.renderOrder ) {\n\n\t\treturn a.renderOrder - b.renderOrder;\n\n\t} else if ( a.z !== b.z ) {\n\n\t\treturn b.z - a.z;\n\n\t} else {\n\n\t\treturn a.id - b.id;\n\n\t}\n\n}\n\n\nfunction WebGLRenderList() {\n\n\tvar renderItems = [];\n\tvar renderItemsIndex = 0;\n\n\tvar opaque = [];\n\tvar transparent = [];\n\n\tvar defaultProgram = { id: - 1 };\n\n\tfunction init() {\n\n\t\trenderItemsIndex = 0;\n\n\t\topaque.length = 0;\n\t\ttransparent.length = 0;\n\n\t}\n\n\tfunction getNextRenderItem( object, geometry, material, groupOrder, z, group ) {\n\n\t\tvar renderItem = renderItems[ renderItemsIndex ];\n\n\t\tif ( renderItem === undefined ) {\n\n\t\t\trenderItem = {\n\t\t\t\tid: object.id,\n\t\t\t\tobject: object,\n\t\t\t\tgeometry: geometry,\n\t\t\t\tmaterial: material,\n\t\t\t\tprogram: material.program || defaultProgram,\n\t\t\t\tgroupOrder: groupOrder,\n\t\t\t\trenderOrder: object.renderOrder,\n\t\t\t\tz: z,\n\t\t\t\tgroup: group\n\t\t\t};\n\n\t\t\trenderItems[ renderItemsIndex ] = renderItem;\n\n\t\t} else {\n\n\t\t\trenderItem.id = object.id;\n\t\t\trenderItem.object = object;\n\t\t\trenderItem.geometry = geometry;\n\t\t\trenderItem.material = material;\n\t\t\trenderItem.program = material.program || defaultProgram;\n\t\t\trenderItem.groupOrder = groupOrder;\n\t\t\trenderItem.renderOrder = object.renderOrder;\n\t\t\trenderItem.z = z;\n\t\t\trenderItem.group = group;\n\n\t\t}\n\n\t\trenderItemsIndex ++;\n\n\t\treturn renderItem;\n\n\t}\n\n\tfunction push( object, geometry, material, groupOrder, z, group ) {\n\n\t\tvar renderItem = getNextRenderItem( object, geometry, material, groupOrder, z, group );\n\n\t\t( material.transparent === true ? transparent : opaque ).push( renderItem );\n\n\t}\n\n\tfunction unshift( object, geometry, material, groupOrder, z, group ) {\n\n\t\tvar renderItem = getNextRenderItem( object, geometry, material, groupOrder, z, group );\n\n\t\t( material.transparent === true ? transparent : opaque ).unshift( renderItem );\n\n\t}\n\n\tfunction sort( customOpaqueSort, customTransparentSort ) {\n\n\t\tif ( opaque.length > 1 ) opaque.sort( customOpaqueSort || painterSortStable );\n\t\tif ( transparent.length > 1 ) transparent.sort( customTransparentSort || reversePainterSortStable );\n\n\t}\n\n\tfunction finish() {\n\n\t\t// Clear references from inactive renderItems in the list\n\n\t\tfor ( var i = renderItemsIndex, il = renderItems.length; i < il; i ++ ) {\n\n\t\t\tvar renderItem = renderItems[ i ];\n\n\t\t\tif ( renderItem.id === null ) break;\n\n\t\t\trenderItem.id = null;\n\t\t\trenderItem.object = null;\n\t\t\trenderItem.geometry = null;\n\t\t\trenderItem.material = null;\n\t\t\trenderItem.program = null;\n\t\t\trenderItem.group = null;\n\n\t\t}\n\n\t}\n\n\treturn {\n\t\topaque: opaque,\n\t\ttransparent: transparent,\n\n\t\tinit: init,\n\t\tpush: push,\n\t\tunshift: unshift,\n\t\tfinish: finish,\n\n\t\tsort: sort\n\t};\n\n}\n\nfunction WebGLRenderLists() {\n\n\tvar lists = new WeakMap();\n\n\tfunction onSceneDispose( event ) {\n\n\t\tvar scene = event.target;\n\n\t\tscene.removeEventListener( 'dispose', onSceneDispose );\n\n\t\tlists.delete( scene );\n\n\t}\n\n\tfunction get( scene, camera ) {\n\n\t\tvar cameras = lists.get( scene );\n\t\tvar list;\n\t\tif ( cameras === undefined ) {\n\n\t\t\tlist = new WebGLRenderList();\n\t\t\tlists.set( scene, new WeakMap() );\n\t\t\tlists.get( scene ).set( camera, list );\n\n\t\t\tscene.addEventListener( 'dispose', onSceneDispose );\n\n\t\t} else {\n\n\t\t\tlist = cameras.get( camera );\n\t\t\tif ( list === undefined ) {\n\n\t\t\t\tlist = new WebGLRenderList();\n\t\t\t\tcameras.set( camera, list );\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn list;\n\n\t}\n\n\tfunction dispose() {\n\n\t\tlists = new WeakMap();\n\n\t}\n\n\treturn {\n\t\tget: get,\n\t\tdispose: dispose\n\t};\n\n}\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction UniformsCache() {\n\n\tvar lights = {};\n\n\treturn {\n\n\t\tget: function ( light ) {\n\n\t\t\tif ( lights[ light.id ] !== undefined ) {\n\n\t\t\t\treturn lights[ light.id ];\n\n\t\t\t}\n\n\t\t\tvar uniforms;\n\n\t\t\tswitch ( light.type ) {\n\n\t\t\t\tcase 'DirectionalLight':\n\t\t\t\t\tuniforms = {\n\t\t\t\t\t\tdirection: new Vector3(),\n\t\t\t\t\t\tcolor: new Color()\n\t\t\t\t\t};\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase 'SpotLight':\n\t\t\t\t\tuniforms = {\n\t\t\t\t\t\tposition: new Vector3(),\n\t\t\t\t\t\tdirection: new Vector3(),\n\t\t\t\t\t\tcolor: new Color(),\n\t\t\t\t\t\tdistance: 0,\n\t\t\t\t\t\tconeCos: 0,\n\t\t\t\t\t\tpenumbraCos: 0,\n\t\t\t\t\t\tdecay: 0\n\t\t\t\t\t};\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase 'PointLight':\n\t\t\t\t\tuniforms = {\n\t\t\t\t\t\tposition: new Vector3(),\n\t\t\t\t\t\tcolor: new Color(),\n\t\t\t\t\t\tdistance: 0,\n\t\t\t\t\t\tdecay: 0\n\t\t\t\t\t};\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase 'HemisphereLight':\n\t\t\t\t\tuniforms = {\n\t\t\t\t\t\tdirection: new Vector3(),\n\t\t\t\t\t\tskyColor: new Color(),\n\t\t\t\t\t\tgroundColor: new Color()\n\t\t\t\t\t};\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase 'RectAreaLight':\n\t\t\t\t\tuniforms = {\n\t\t\t\t\t\tcolor: new Color(),\n\t\t\t\t\t\tposition: new Vector3(),\n\t\t\t\t\t\thalfWidth: new Vector3(),\n\t\t\t\t\t\thalfHeight: new Vector3()\n\t\t\t\t\t};\n\t\t\t\t\tbreak;\n\n\t\t\t}\n\n\t\t\tlights[ light.id ] = uniforms;\n\n\t\t\treturn uniforms;\n\n\t\t}\n\n\t};\n\n}\n\nfunction ShadowUniformsCache() {\n\n\tvar lights = {};\n\n\treturn {\n\n\t\tget: function ( light ) {\n\n\t\t\tif ( lights[ light.id ] !== undefined ) {\n\n\t\t\t\treturn lights[ light.id ];\n\n\t\t\t}\n\n\t\t\tvar uniforms;\n\n\t\t\tswitch ( light.type ) {\n\n\t\t\t\tcase 'DirectionalLight':\n\t\t\t\t\tuniforms = {\n\t\t\t\t\t\tshadowBias: 0,\n\t\t\t\t\t\tshadowRadius: 1,\n\t\t\t\t\t\tshadowMapSize: new Vector2()\n\t\t\t\t\t};\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase 'SpotLight':\n\t\t\t\t\tuniforms = {\n\t\t\t\t\t\tshadowBias: 0,\n\t\t\t\t\t\tshadowRadius: 1,\n\t\t\t\t\t\tshadowMapSize: new Vector2()\n\t\t\t\t\t};\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase 'PointLight':\n\t\t\t\t\tuniforms = {\n\t\t\t\t\t\tshadowBias: 0,\n\t\t\t\t\t\tshadowRadius: 1,\n\t\t\t\t\t\tshadowMapSize: new Vector2(),\n\t\t\t\t\t\tshadowCameraNear: 1,\n\t\t\t\t\t\tshadowCameraFar: 1000\n\t\t\t\t\t};\n\t\t\t\t\tbreak;\n\n\t\t\t\t// TODO (abelnation): set RectAreaLight shadow uniforms\n\n\t\t\t}\n\n\t\t\tlights[ light.id ] = uniforms;\n\n\t\t\treturn uniforms;\n\n\t\t}\n\n\t};\n\n}\n\n\n\nvar nextVersion = 0;\n\nfunction shadowCastingLightsFirst( lightA, lightB ) {\n\n\treturn ( lightB.castShadow ? 1 : 0 ) - ( lightA.castShadow ? 1 : 0 );\n\n}\n\nfunction WebGLLights() {\n\n\tvar cache = new UniformsCache();\n\n\tvar shadowCache = ShadowUniformsCache();\n\n\tvar state = {\n\n\t\tversion: 0,\n\n\t\thash: {\n\t\t\tdirectionalLength: - 1,\n\t\t\tpointLength: - 1,\n\t\t\tspotLength: - 1,\n\t\t\trectAreaLength: - 1,\n\t\t\themiLength: - 1,\n\n\t\t\tnumDirectionalShadows: - 1,\n\t\t\tnumPointShadows: - 1,\n\t\t\tnumSpotShadows: - 1\n\t\t},\n\n\t\tambient: [ 0, 0, 0 ],\n\t\tprobe: [],\n\t\tdirectional: [],\n\t\tdirectionalShadow: [],\n\t\tdirectionalShadowMap: [],\n\t\tdirectionalShadowMatrix: [],\n\t\tspot: [],\n\t\tspotShadow: [],\n\t\tspotShadowMap: [],\n\t\tspotShadowMatrix: [],\n\t\trectArea: [],\n\t\tpoint: [],\n\t\tpointShadow: [],\n\t\tpointShadowMap: [],\n\t\tpointShadowMatrix: [],\n\t\themi: []\n\n\t};\n\n\tfor ( var i = 0; i < 9; i ++ ) state.probe.push( new Vector3() );\n\n\tvar vector3 = new Vector3();\n\tvar matrix4 = new Matrix4();\n\tvar matrix42 = new Matrix4();\n\n\tfunction setup( lights, shadows, camera ) {\n\n\t\tvar r = 0, g = 0, b = 0;\n\n\t\tfor ( var i = 0; i < 9; i ++ ) state.probe[ i ].set( 0, 0, 0 );\n\n\t\tvar directionalLength = 0;\n\t\tvar pointLength = 0;\n\t\tvar spotLength = 0;\n\t\tvar rectAreaLength = 0;\n\t\tvar hemiLength = 0;\n\n\t\tvar numDirectionalShadows = 0;\n\t\tvar numPointShadows = 0;\n\t\tvar numSpotShadows = 0;\n\n\t\tvar viewMatrix = camera.matrixWorldInverse;\n\n\t\tlights.sort( shadowCastingLightsFirst );\n\n\t\tfor ( var i = 0, l = lights.length; i < l; i ++ ) {\n\n\t\t\tvar light = lights[ i ];\n\n\t\t\tvar color = light.color;\n\t\t\tvar intensity = light.intensity;\n\t\t\tvar distance = light.distance;\n\n\t\t\tvar shadowMap = ( light.shadow && light.shadow.map ) ? light.shadow.map.texture : null;\n\n\t\t\tif ( light.isAmbientLight ) {\n\n\t\t\t\tr += color.r * intensity;\n\t\t\t\tg += color.g * intensity;\n\t\t\t\tb += color.b * intensity;\n\n\t\t\t} else if ( light.isLightProbe ) {\n\n\t\t\t\tfor ( var j = 0; j < 9; j ++ ) {\n\n\t\t\t\t\tstate.probe[ j ].addScaledVector( light.sh.coefficients[ j ], intensity );\n\n\t\t\t\t}\n\n\t\t\t} else if ( light.isDirectionalLight ) {\n\n\t\t\t\tvar uniforms = cache.get( light );\n\n\t\t\t\tuniforms.color.copy( light.color ).multiplyScalar( light.intensity );\n\t\t\t\tuniforms.direction.setFromMatrixPosition( light.matrixWorld );\n\t\t\t\tvector3.setFromMatrixPosition( light.target.matrixWorld );\n\t\t\t\tuniforms.direction.sub( vector3 );\n\t\t\t\tuniforms.direction.transformDirection( viewMatrix );\n\n\t\t\t\tif ( light.castShadow ) {\n\n\t\t\t\t\tvar shadow = light.shadow;\n\n\t\t\t\t\tvar shadowUniforms = shadowCache.get( light );\n\n\t\t\t\t\tshadowUniforms.shadowBias = shadow.bias;\n\t\t\t\t\tshadowUniforms.shadowRadius = shadow.radius;\n\t\t\t\t\tshadowUniforms.shadowMapSize = shadow.mapSize;\n\n\t\t\t\t\tstate.directionalShadow[ directionalLength ] = shadowUniforms;\n\t\t\t\t\tstate.directionalShadowMap[ directionalLength ] = shadowMap;\n\t\t\t\t\tstate.directionalShadowMatrix[ directionalLength ] = light.shadow.matrix;\n\n\t\t\t\t\tnumDirectionalShadows ++;\n\n\t\t\t\t}\n\n\t\t\t\tstate.directional[ directionalLength ] = uniforms;\n\n\t\t\t\tdirectionalLength ++;\n\n\t\t\t} else if ( light.isSpotLight ) {\n\n\t\t\t\tvar uniforms = cache.get( light );\n\n\t\t\t\tuniforms.position.setFromMatrixPosition( light.matrixWorld );\n\t\t\t\tuniforms.position.applyMatrix4( viewMatrix );\n\n\t\t\t\tuniforms.color.copy( color ).multiplyScalar( intensity );\n\t\t\t\tuniforms.distance = distance;\n\n\t\t\t\tuniforms.direction.setFromMatrixPosition( light.matrixWorld );\n\t\t\t\tvector3.setFromMatrixPosition( light.target.matrixWorld );\n\t\t\t\tuniforms.direction.sub( vector3 );\n\t\t\t\tuniforms.direction.transformDirection( viewMatrix );\n\n\t\t\t\tuniforms.coneCos = Math.cos( light.angle );\n\t\t\t\tuniforms.penumbraCos = Math.cos( light.angle * ( 1 - light.penumbra ) );\n\t\t\t\tuniforms.decay = light.decay;\n\n\t\t\t\tif ( light.castShadow ) {\n\n\t\t\t\t\tvar shadow = light.shadow;\n\n\t\t\t\t\tvar shadowUniforms = shadowCache.get( light );\n\n\t\t\t\t\tshadowUniforms.shadowBias = shadow.bias;\n\t\t\t\t\tshadowUniforms.shadowRadius = shadow.radius;\n\t\t\t\t\tshadowUniforms.shadowMapSize = shadow.mapSize;\n\n\t\t\t\t\tstate.spotShadow[ spotLength ] = shadowUniforms;\n\t\t\t\t\tstate.spotShadowMap[ spotLength ] = shadowMap;\n\t\t\t\t\tstate.spotShadowMatrix[ spotLength ] = light.shadow.matrix;\n\n\t\t\t\t\tnumSpotShadows ++;\n\n\t\t\t\t}\n\n\t\t\t\tstate.spot[ spotLength ] = uniforms;\n\n\t\t\t\tspotLength ++;\n\n\t\t\t} else if ( light.isRectAreaLight ) {\n\n\t\t\t\tvar uniforms = cache.get( light );\n\n\t\t\t\t// (a) intensity is the total visible light emitted\n\t\t\t\t//uniforms.color.copy( color ).multiplyScalar( intensity / ( light.width * light.height * Math.PI ) );\n\n\t\t\t\t// (b) intensity is the brightness of the light\n\t\t\t\tuniforms.color.copy( color ).multiplyScalar( intensity );\n\n\t\t\t\tuniforms.position.setFromMatrixPosition( light.matrixWorld );\n\t\t\t\tuniforms.position.applyMatrix4( viewMatrix );\n\n\t\t\t\t// extract local rotation of light to derive width/height half vectors\n\t\t\t\tmatrix42.identity();\n\t\t\t\tmatrix4.copy( light.matrixWorld );\n\t\t\t\tmatrix4.premultiply( viewMatrix );\n\t\t\t\tmatrix42.extractRotation( matrix4 );\n\n\t\t\t\tuniforms.halfWidth.set( light.width * 0.5, 0.0, 0.0 );\n\t\t\t\tuniforms.halfHeight.set( 0.0, light.height * 0.5, 0.0 );\n\n\t\t\t\tuniforms.halfWidth.applyMatrix4( matrix42 );\n\t\t\t\tuniforms.halfHeight.applyMatrix4( matrix42 );\n\n\t\t\t\t// TODO (abelnation): RectAreaLight distance?\n\t\t\t\t// uniforms.distance = distance;\n\n\t\t\t\tstate.rectArea[ rectAreaLength ] = uniforms;\n\n\t\t\t\trectAreaLength ++;\n\n\t\t\t} else if ( light.isPointLight ) {\n\n\t\t\t\tvar uniforms = cache.get( light );\n\n\t\t\t\tuniforms.position.setFromMatrixPosition( light.matrixWorld );\n\t\t\t\tuniforms.position.applyMatrix4( viewMatrix );\n\n\t\t\t\tuniforms.color.copy( light.color ).multiplyScalar( light.intensity );\n\t\t\t\tuniforms.distance = light.distance;\n\t\t\t\tuniforms.decay = light.decay;\n\n\t\t\t\tif ( light.castShadow ) {\n\n\t\t\t\t\tvar shadow = light.shadow;\n\n\t\t\t\t\tvar shadowUniforms = shadowCache.get( light );\n\n\t\t\t\t\tshadowUniforms.shadowBias = shadow.bias;\n\t\t\t\t\tshadowUniforms.shadowRadius = shadow.radius;\n\t\t\t\t\tshadowUniforms.shadowMapSize = shadow.mapSize;\n\t\t\t\t\tshadowUniforms.shadowCameraNear = shadow.camera.near;\n\t\t\t\t\tshadowUniforms.shadowCameraFar = shadow.camera.far;\n\n\t\t\t\t\tstate.pointShadow[ pointLength ] = shadowUniforms;\n\t\t\t\t\tstate.pointShadowMap[ pointLength ] = shadowMap;\n\t\t\t\t\tstate.pointShadowMatrix[ pointLength ] = light.shadow.matrix;\n\n\t\t\t\t\tnumPointShadows ++;\n\n\t\t\t\t}\n\n\t\t\t\tstate.point[ pointLength ] = uniforms;\n\n\t\t\t\tpointLength ++;\n\n\t\t\t} else if ( light.isHemisphereLight ) {\n\n\t\t\t\tvar uniforms = cache.get( light );\n\n\t\t\t\tuniforms.direction.setFromMatrixPosition( light.matrixWorld );\n\t\t\t\tuniforms.direction.transformDirection( viewMatrix );\n\t\t\t\tuniforms.direction.normalize();\n\n\t\t\t\tuniforms.skyColor.copy( light.color ).multiplyScalar( intensity );\n\t\t\t\tuniforms.groundColor.copy( light.groundColor ).multiplyScalar( intensity );\n\n\t\t\t\tstate.hemi[ hemiLength ] = uniforms;\n\n\t\t\t\themiLength ++;\n\n\t\t\t}\n\n\t\t}\n\n\t\tstate.ambient[ 0 ] = r;\n\t\tstate.ambient[ 1 ] = g;\n\t\tstate.ambient[ 2 ] = b;\n\n\t\tvar hash = state.hash;\n\n\t\tif ( hash.directionalLength !== directionalLength ||\n\t\t\thash.pointLength !== pointLength ||\n\t\t\thash.spotLength !== spotLength ||\n\t\t\thash.rectAreaLength !== rectAreaLength ||\n\t\t\thash.hemiLength !== hemiLength ||\n\t\t\thash.numDirectionalShadows !== numDirectionalShadows ||\n\t\t\thash.numPointShadows !== numPointShadows ||\n\t\t\thash.numSpotShadows !== numSpotShadows ) {\n\n\t\t\tstate.directional.length = directionalLength;\n\t\t\tstate.spot.length = spotLength;\n\t\t\tstate.rectArea.length = rectAreaLength;\n\t\t\tstate.point.length = pointLength;\n\t\t\tstate.hemi.length = hemiLength;\n\n\t\t\tstate.directionalShadow.length = numDirectionalShadows;\n\t\t\tstate.directionalShadowMap.length = numDirectionalShadows;\n\t\t\tstate.pointShadow.length = numPointShadows;\n\t\t\tstate.pointShadowMap.length = numPointShadows;\n\t\t\tstate.spotShadow.length = numSpotShadows;\n\t\t\tstate.spotShadowMap.length = numSpotShadows;\n\t\t\tstate.directionalShadowMatrix.length = numDirectionalShadows;\n\t\t\tstate.pointShadowMatrix.length = numPointShadows;\n\t\t\tstate.spotShadowMatrix.length = numSpotShadows;\n\n\t\t\thash.directionalLength = directionalLength;\n\t\t\thash.pointLength = pointLength;\n\t\t\thash.spotLength = spotLength;\n\t\t\thash.rectAreaLength = rectAreaLength;\n\t\t\thash.hemiLength = hemiLength;\n\n\t\t\thash.numDirectionalShadows = numDirectionalShadows;\n\t\t\thash.numPointShadows = numPointShadows;\n\t\t\thash.numSpotShadows = numSpotShadows;\n\n\t\t\tstate.version = nextVersion ++;\n\n\t\t}\n\n\t}\n\n\treturn {\n\t\tsetup: setup,\n\t\tstate: state\n\t};\n\n}\n\n/**\n * @author Mugen87 / https://github.com/Mugen87\n */\n\nfunction WebGLRenderState() {\n\n\tvar lights = new WebGLLights();\n\n\tvar lightsArray = [];\n\tvar shadowsArray = [];\n\n\tfunction init() {\n\n\t\tlightsArray.length = 0;\n\t\tshadowsArray.length = 0;\n\n\t}\n\n\tfunction pushLight( light ) {\n\n\t\tlightsArray.push( light );\n\n\t}\n\n\tfunction pushShadow( shadowLight ) {\n\n\t\tshadowsArray.push( shadowLight );\n\n\t}\n\n\tfunction setupLights( camera ) {\n\n\t\tlights.setup( lightsArray, shadowsArray, camera );\n\n\t}\n\n\tvar state = {\n\t\tlightsArray: lightsArray,\n\t\tshadowsArray: shadowsArray,\n\n\t\tlights: lights\n\t};\n\n\treturn {\n\t\tinit: init,\n\t\tstate: state,\n\t\tsetupLights: setupLights,\n\n\t\tpushLight: pushLight,\n\t\tpushShadow: pushShadow\n\t};\n\n}\n\nfunction WebGLRenderStates() {\n\n\tvar renderStates = new WeakMap();\n\n\tfunction onSceneDispose( event ) {\n\n\t\tvar scene = event.target;\n\n\t\tscene.removeEventListener( 'dispose', onSceneDispose );\n\n\t\trenderStates.delete( scene );\n\n\t}\n\n\tfunction get( scene, camera ) {\n\n\t\tvar renderState;\n\n\t\tif ( renderStates.has( scene ) === false ) {\n\n\t\t\trenderState = new WebGLRenderState();\n\t\t\trenderStates.set( scene, new WeakMap() );\n\t\t\trenderStates.get( scene ).set( camera, renderState );\n\n\t\t\tscene.addEventListener( 'dispose', onSceneDispose );\n\n\t\t} else {\n\n\t\t\tif ( renderStates.get( scene ).has( camera ) === false ) {\n\n\t\t\t\trenderState = new WebGLRenderState();\n\t\t\t\trenderStates.get( scene ).set( camera, renderState );\n\n\t\t\t} else {\n\n\t\t\t\trenderState = renderStates.get( scene ).get( camera );\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn renderState;\n\n\t}\n\n\tfunction dispose() {\n\n\t\trenderStates = new WeakMap();\n\n\t}\n\n\treturn {\n\t\tget: get,\n\t\tdispose: dispose\n\t};\n\n}\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n * @author bhouston / https://clara.io\n * @author WestLangley / http://github.com/WestLangley\n *\n * parameters = {\n *\n *  opacity: <float>,\n *\n *  map: new THREE.Texture( <Image> ),\n *\n *  alphaMap: new THREE.Texture( <Image> ),\n *\n *  displacementMap: new THREE.Texture( <Image> ),\n *  displacementScale: <float>,\n *  displacementBias: <float>,\n *\n *  wireframe: <boolean>,\n *  wireframeLinewidth: <float>\n * }\n */\n\nfunction MeshDepthMaterial( parameters ) {\n\n\tMaterial.call( this );\n\n\tthis.type = 'MeshDepthMaterial';\n\n\tthis.depthPacking = BasicDepthPacking;\n\n\tthis.skinning = false;\n\tthis.morphTargets = false;\n\n\tthis.map = null;\n\n\tthis.alphaMap = null;\n\n\tthis.displacementMap = null;\n\tthis.displacementScale = 1;\n\tthis.displacementBias = 0;\n\n\tthis.wireframe = false;\n\tthis.wireframeLinewidth = 1;\n\n\tthis.fog = false;\n\n\tthis.setValues( parameters );\n\n}\n\nMeshDepthMaterial.prototype = Object.create( Material.prototype );\nMeshDepthMaterial.prototype.constructor = MeshDepthMaterial;\n\nMeshDepthMaterial.prototype.isMeshDepthMaterial = true;\n\nMeshDepthMaterial.prototype.copy = function ( source ) {\n\n\tMaterial.prototype.copy.call( this, source );\n\n\tthis.depthPacking = source.depthPacking;\n\n\tthis.skinning = source.skinning;\n\tthis.morphTargets = source.morphTargets;\n\n\tthis.map = source.map;\n\n\tthis.alphaMap = source.alphaMap;\n\n\tthis.displacementMap = source.displacementMap;\n\tthis.displacementScale = source.displacementScale;\n\tthis.displacementBias = source.displacementBias;\n\n\tthis.wireframe = source.wireframe;\n\tthis.wireframeLinewidth = source.wireframeLinewidth;\n\n\treturn this;\n\n};\n\n/**\n * @author WestLangley / http://github.com/WestLangley\n *\n * parameters = {\n *\n *  referencePosition: <float>,\n *  nearDistance: <float>,\n *  farDistance: <float>,\n *\n *  skinning: <bool>,\n *  morphTargets: <bool>,\n *\n *  map: new THREE.Texture( <Image> ),\n *\n *  alphaMap: new THREE.Texture( <Image> ),\n *\n *  displacementMap: new THREE.Texture( <Image> ),\n *  displacementScale: <float>,\n *  displacementBias: <float>\n *\n * }\n */\n\nfunction MeshDistanceMaterial( parameters ) {\n\n\tMaterial.call( this );\n\n\tthis.type = 'MeshDistanceMaterial';\n\n\tthis.referencePosition = new Vector3();\n\tthis.nearDistance = 1;\n\tthis.farDistance = 1000;\n\n\tthis.skinning = false;\n\tthis.morphTargets = false;\n\n\tthis.map = null;\n\n\tthis.alphaMap = null;\n\n\tthis.displacementMap = null;\n\tthis.displacementScale = 1;\n\tthis.displacementBias = 0;\n\n\tthis.fog = false;\n\n\tthis.setValues( parameters );\n\n}\n\nMeshDistanceMaterial.prototype = Object.create( Material.prototype );\nMeshDistanceMaterial.prototype.constructor = MeshDistanceMaterial;\n\nMeshDistanceMaterial.prototype.isMeshDistanceMaterial = true;\n\nMeshDistanceMaterial.prototype.copy = function ( source ) {\n\n\tMaterial.prototype.copy.call( this, source );\n\n\tthis.referencePosition.copy( source.referencePosition );\n\tthis.nearDistance = source.nearDistance;\n\tthis.farDistance = source.farDistance;\n\n\tthis.skinning = source.skinning;\n\tthis.morphTargets = source.morphTargets;\n\n\tthis.map = source.map;\n\n\tthis.alphaMap = source.alphaMap;\n\n\tthis.displacementMap = source.displacementMap;\n\tthis.displacementScale = source.displacementScale;\n\tthis.displacementBias = source.displacementBias;\n\n\treturn this;\n\n};\n\nvar vsm_frag = \"uniform sampler2D shadow_pass;\\nuniform vec2 resolution;\\nuniform float radius;\\n#include <packing>\\nvoid main() {\\n  float mean = 0.0;\\n  float squared_mean = 0.0;\\n\\tfloat depth = unpackRGBAToDepth( texture2D( shadow_pass, ( gl_FragCoord.xy  ) / resolution ) );\\n  for ( float i = -1.0; i < 1.0 ; i += SAMPLE_RATE) {\\n    #ifdef HORIZONAL_PASS\\n      vec2 distribution = unpackRGBATo2Half( texture2D( shadow_pass, ( gl_FragCoord.xy + vec2( i, 0.0 ) * radius ) / resolution ) );\\n      mean += distribution.x;\\n      squared_mean += distribution.y * distribution.y + distribution.x * distribution.x;\\n    #else\\n      float depth = unpackRGBAToDepth( texture2D( shadow_pass, ( gl_FragCoord.xy + vec2( 0.0,  i )  * radius ) / resolution ) );\\n      mean += depth;\\n      squared_mean += depth * depth;\\n    #endif\\n  }\\n  mean = mean * HALF_SAMPLE_RATE;\\n  squared_mean = squared_mean * HALF_SAMPLE_RATE;\\n  float std_dev = sqrt( squared_mean - mean * mean );\\n  gl_FragColor = pack2HalfToRGBA( vec2( mean, std_dev ) );\\n}\";\n\nvar vsm_vert = \"void main() {\\n\\tgl_Position = vec4( position, 1.0 );\\n}\";\n\n/**\n * @author alteredq / http://alteredqualia.com/\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction WebGLShadowMap( _renderer, _objects, maxTextureSize ) {\n\n\tvar _frustum = new Frustum(),\n\n\t\t_shadowMapSize = new Vector2(),\n\t\t_viewportSize = new Vector2(),\n\n\t\t_viewport = new Vector4(),\n\n\t\t_depthMaterials = [],\n\t\t_distanceMaterials = [],\n\n\t\t_materialCache = {};\n\n\tvar shadowSide = { 0: BackSide, 1: FrontSide, 2: DoubleSide };\n\n\tvar shadowMaterialVertical = new ShaderMaterial( {\n\n\t\tdefines: {\n\t\t\tSAMPLE_RATE: 2.0 / 8.0,\n\t\t\tHALF_SAMPLE_RATE: 1.0 / 8.0\n\t\t},\n\n\t\tuniforms: {\n\t\t\tshadow_pass: { value: null },\n\t\t\tresolution: { value: new Vector2() },\n\t\t\tradius: { value: 4.0 }\n\t\t},\n\n\t\tvertexShader: vsm_vert,\n\n\t\tfragmentShader: vsm_frag\n\n\t} );\n\n\tvar shadowMaterialHorizonal = shadowMaterialVertical.clone();\n\tshadowMaterialHorizonal.defines.HORIZONAL_PASS = 1;\n\n\tvar fullScreenTri = new BufferGeometry();\n\tfullScreenTri.setAttribute(\n\t\t\"position\",\n\t\tnew BufferAttribute(\n\t\t\tnew Float32Array( [ - 1, - 1, 0.5, 3, - 1, 0.5, - 1, 3, 0.5 ] ),\n\t\t\t3\n\t\t)\n\t);\n\n\tvar fullScreenMesh = new Mesh( fullScreenTri, shadowMaterialVertical );\n\n\tvar scope = this;\n\n\tthis.enabled = false;\n\n\tthis.autoUpdate = true;\n\tthis.needsUpdate = false;\n\n\tthis.type = PCFShadowMap;\n\n\tthis.render = function ( lights, scene, camera ) {\n\n\t\tif ( scope.enabled === false ) return;\n\t\tif ( scope.autoUpdate === false && scope.needsUpdate === false ) return;\n\n\t\tif ( lights.length === 0 ) return;\n\n\t\tvar currentRenderTarget = _renderer.getRenderTarget();\n\t\tvar activeCubeFace = _renderer.getActiveCubeFace();\n\t\tvar activeMipmapLevel = _renderer.getActiveMipmapLevel();\n\n\t\tvar _state = _renderer.state;\n\n\t\t// Set GL state for depth map.\n\t\t_state.setBlending( NoBlending );\n\t\t_state.buffers.color.setClear( 1, 1, 1, 1 );\n\t\t_state.buffers.depth.setTest( true );\n\t\t_state.setScissorTest( false );\n\n\t\t// render depth map\n\n\t\tfor ( var i = 0, il = lights.length; i < il; i ++ ) {\n\n\t\t\tvar light = lights[ i ];\n\t\t\tvar shadow = light.shadow;\n\n\t\t\tif ( shadow === undefined ) {\n\n\t\t\t\tconsole.warn( 'THREE.WebGLShadowMap:', light, 'has no shadow.' );\n\t\t\t\tcontinue;\n\n\t\t\t}\n\n\t\t\t_shadowMapSize.copy( shadow.mapSize );\n\n\t\t\tvar shadowFrameExtents = shadow.getFrameExtents();\n\n\t\t\t_shadowMapSize.multiply( shadowFrameExtents );\n\n\t\t\t_viewportSize.copy( shadow.mapSize );\n\n\t\t\tif ( _shadowMapSize.x > maxTextureSize || _shadowMapSize.y > maxTextureSize ) {\n\n\t\t\t\tconsole.warn( 'THREE.WebGLShadowMap:', light, 'has shadow exceeding max texture size, reducing' );\n\n\t\t\t\tif ( _shadowMapSize.x > maxTextureSize ) {\n\n\t\t\t\t\t_viewportSize.x = Math.floor( maxTextureSize / shadowFrameExtents.x );\n\t\t\t\t\t_shadowMapSize.x = _viewportSize.x * shadowFrameExtents.x;\n\t\t\t\t\tshadow.mapSize.x = _viewportSize.x;\n\n\t\t\t\t}\n\n\t\t\t\tif ( _shadowMapSize.y > maxTextureSize ) {\n\n\t\t\t\t\t_viewportSize.y = Math.floor( maxTextureSize / shadowFrameExtents.y );\n\t\t\t\t\t_shadowMapSize.y = _viewportSize.y * shadowFrameExtents.y;\n\t\t\t\t\tshadow.mapSize.y = _viewportSize.y;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tif ( shadow.map === null && ! shadow.isPointLightShadow && this.type === VSMShadowMap ) {\n\n\t\t\t\tvar pars = { minFilter: LinearFilter, magFilter: LinearFilter, format: RGBAFormat };\n\n\t\t\t\tshadow.map = new WebGLRenderTarget( _shadowMapSize.x, _shadowMapSize.y, pars );\n\t\t\t\tshadow.map.texture.name = light.name + \".shadowMap\";\n\n\t\t\t\tshadow.mapPass = new WebGLRenderTarget( _shadowMapSize.x, _shadowMapSize.y, pars );\n\n\t\t\t\tshadow.camera.updateProjectionMatrix();\n\n\t\t\t}\n\n\t\t\tif ( shadow.map === null ) {\n\n\t\t\t\tvar pars = { minFilter: NearestFilter, magFilter: NearestFilter, format: RGBAFormat };\n\n\t\t\t\tshadow.map = new WebGLRenderTarget( _shadowMapSize.x, _shadowMapSize.y, pars );\n\t\t\t\tshadow.map.texture.name = light.name + \".shadowMap\";\n\n\t\t\t\tshadow.camera.updateProjectionMatrix();\n\n\t\t\t}\n\n\t\t\t_renderer.setRenderTarget( shadow.map );\n\t\t\t_renderer.clear();\n\n\t\t\tvar viewportCount = shadow.getViewportCount();\n\n\t\t\tfor ( var vp = 0; vp < viewportCount; vp ++ ) {\n\n\t\t\t\tvar viewport = shadow.getViewport( vp );\n\n\t\t\t\t_viewport.set(\n\t\t\t\t\t_viewportSize.x * viewport.x,\n\t\t\t\t\t_viewportSize.y * viewport.y,\n\t\t\t\t\t_viewportSize.x * viewport.z,\n\t\t\t\t\t_viewportSize.y * viewport.w\n\t\t\t\t);\n\n\t\t\t\t_state.viewport( _viewport );\n\n\t\t\t\tshadow.updateMatrices( light, vp );\n\n\t\t\t\t_frustum = shadow.getFrustum();\n\n\t\t\t\trenderObject( scene, camera, shadow.camera, light, this.type );\n\n\t\t\t}\n\n\t\t\t// do blur pass for VSM\n\n\t\t\tif ( ! shadow.isPointLightShadow && this.type === VSMShadowMap ) {\n\n\t\t\t\tVSMPass( shadow, camera );\n\n\t\t\t}\n\n\t\t}\n\n\t\tscope.needsUpdate = false;\n\n\t\t_renderer.setRenderTarget( currentRenderTarget, activeCubeFace, activeMipmapLevel );\n\n\t};\n\n\tfunction VSMPass( shadow, camera ) {\n\n\t\tvar geometry = _objects.update( fullScreenMesh );\n\n\t\t// vertical pass\n\n\t\tshadowMaterialVertical.uniforms.shadow_pass.value = shadow.map.texture;\n\t\tshadowMaterialVertical.uniforms.resolution.value = shadow.mapSize;\n\t\tshadowMaterialVertical.uniforms.radius.value = shadow.radius;\n\t\t_renderer.setRenderTarget( shadow.mapPass );\n\t\t_renderer.clear();\n\t\t_renderer.renderBufferDirect( camera, null, geometry, shadowMaterialVertical, fullScreenMesh, null );\n\n\t\t// horizonal pass\n\n\t\tshadowMaterialHorizonal.uniforms.shadow_pass.value = shadow.mapPass.texture;\n\t\tshadowMaterialHorizonal.uniforms.resolution.value = shadow.mapSize;\n\t\tshadowMaterialHorizonal.uniforms.radius.value = shadow.radius;\n\t\t_renderer.setRenderTarget( shadow.map );\n\t\t_renderer.clear();\n\t\t_renderer.renderBufferDirect( camera, null, geometry, shadowMaterialHorizonal, fullScreenMesh, null );\n\n\t}\n\n\tfunction getDepthMaterialVariant( useMorphing, useSkinning, useInstancing ) {\n\n\t\tvar index = useMorphing << 0 | useSkinning << 1 | useInstancing << 2;\n\n\t\tvar material = _depthMaterials[ index ];\n\n\t\tif ( material === undefined ) {\n\n\t\t\tmaterial = new MeshDepthMaterial( {\n\n\t\t\t\tdepthPacking: RGBADepthPacking,\n\n\t\t\t\tmorphTargets: useMorphing,\n\t\t\t\tskinning: useSkinning\n\n\t\t\t} );\n\n\t\t\t_depthMaterials[ index ] = material;\n\n\t\t}\n\n\t\treturn material;\n\n\t}\n\n\tfunction getDistanceMaterialVariant( useMorphing, useSkinning, useInstancing ) {\n\n\t\tvar index = useMorphing << 0 | useSkinning << 1 | useInstancing << 2;\n\n\t\tvar material = _distanceMaterials[ index ];\n\n\t\tif ( material === undefined ) {\n\n\t\t\tmaterial = new MeshDistanceMaterial( {\n\n\t\t\t\tmorphTargets: useMorphing,\n\t\t\t\tskinning: useSkinning\n\n\t\t\t} );\n\n\t\t\t_distanceMaterials[ index ] = material;\n\n\t\t}\n\n\t\treturn material;\n\n\t}\n\n\tfunction getDepthMaterial( object, material, light, shadowCameraNear, shadowCameraFar, type ) {\n\n\t\tvar geometry = object.geometry;\n\n\t\tvar result = null;\n\n\t\tvar getMaterialVariant = getDepthMaterialVariant;\n\t\tvar customMaterial = object.customDepthMaterial;\n\n\t\tif ( light.isPointLight === true ) {\n\n\t\t\tgetMaterialVariant = getDistanceMaterialVariant;\n\t\t\tcustomMaterial = object.customDistanceMaterial;\n\n\t\t}\n\n\t\tif ( customMaterial === undefined ) {\n\n\t\t\tvar useMorphing = false;\n\n\t\t\tif ( material.morphTargets === true ) {\n\n\t\t\t\tif ( geometry.isBufferGeometry === true ) {\n\n\t\t\t\t\tuseMorphing = geometry.morphAttributes && geometry.morphAttributes.position && geometry.morphAttributes.position.length > 0;\n\n\t\t\t\t} else if ( geometry.isGeometry === true ) {\n\n\t\t\t\t\tuseMorphing = geometry.morphTargets && geometry.morphTargets.length > 0;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tvar useSkinning = false;\n\n\t\t\tif ( object.isSkinnedMesh === true ) {\n\n\t\t\t\tif ( material.skinning === true ) {\n\n\t\t\t\t\tuseSkinning = true;\n\n\t\t\t\t} else {\n\n\t\t\t\t\tconsole.warn( 'THREE.WebGLShadowMap: THREE.SkinnedMesh with material.skinning set to false:', object );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tvar useInstancing = object.isInstancedMesh === true;\n\n\t\t\tresult = getMaterialVariant( useMorphing, useSkinning, useInstancing );\n\n\t\t} else {\n\n\t\t\tresult = customMaterial;\n\n\t\t}\n\n\t\tif ( _renderer.localClippingEnabled &&\n\t\t\t\tmaterial.clipShadows === true &&\n\t\t\t\tmaterial.clippingPlanes.length !== 0 ) {\n\n\t\t\t// in this case we need a unique material instance reflecting the\n\t\t\t// appropriate state\n\n\t\t\tvar keyA = result.uuid, keyB = material.uuid;\n\n\t\t\tvar materialsForVariant = _materialCache[ keyA ];\n\n\t\t\tif ( materialsForVariant === undefined ) {\n\n\t\t\t\tmaterialsForVariant = {};\n\t\t\t\t_materialCache[ keyA ] = materialsForVariant;\n\n\t\t\t}\n\n\t\t\tvar cachedMaterial = materialsForVariant[ keyB ];\n\n\t\t\tif ( cachedMaterial === undefined ) {\n\n\t\t\t\tcachedMaterial = result.clone();\n\t\t\t\tmaterialsForVariant[ keyB ] = cachedMaterial;\n\n\t\t\t}\n\n\t\t\tresult = cachedMaterial;\n\n\t\t}\n\n\t\tresult.visible = material.visible;\n\t\tresult.wireframe = material.wireframe;\n\n\t\tif ( type === VSMShadowMap ) {\n\n\t\t\tresult.side = ( material.shadowSide !== null ) ? material.shadowSide : material.side;\n\n\t\t} else {\n\n\t\t\tresult.side = ( material.shadowSide !== null ) ? material.shadowSide : shadowSide[ material.side ];\n\n\t\t}\n\n\t\tresult.clipShadows = material.clipShadows;\n\t\tresult.clippingPlanes = material.clippingPlanes;\n\t\tresult.clipIntersection = material.clipIntersection;\n\n\t\tresult.wireframeLinewidth = material.wireframeLinewidth;\n\t\tresult.linewidth = material.linewidth;\n\n\t\tif ( light.isPointLight === true && result.isMeshDistanceMaterial === true ) {\n\n\t\t\tresult.referencePosition.setFromMatrixPosition( light.matrixWorld );\n\t\t\tresult.nearDistance = shadowCameraNear;\n\t\t\tresult.farDistance = shadowCameraFar;\n\n\t\t}\n\n\t\treturn result;\n\n\t}\n\n\tfunction renderObject( object, camera, shadowCamera, light, type ) {\n\n\t\tif ( object.visible === false ) return;\n\n\t\tvar visible = object.layers.test( camera.layers );\n\n\t\tif ( visible && ( object.isMesh || object.isLine || object.isPoints ) ) {\n\n\t\t\tif ( ( object.castShadow || ( object.receiveShadow && type === VSMShadowMap ) ) && ( ! object.frustumCulled || _frustum.intersectsObject( object ) ) ) {\n\n\t\t\t\tobject.modelViewMatrix.multiplyMatrices( shadowCamera.matrixWorldInverse, object.matrixWorld );\n\n\t\t\t\tvar geometry = _objects.update( object );\n\t\t\t\tvar material = object.material;\n\n\t\t\t\tif ( Array.isArray( material ) ) {\n\n\t\t\t\t\tvar groups = geometry.groups;\n\n\t\t\t\t\tfor ( var k = 0, kl = groups.length; k < kl; k ++ ) {\n\n\t\t\t\t\t\tvar group = groups[ k ];\n\t\t\t\t\t\tvar groupMaterial = material[ group.materialIndex ];\n\n\t\t\t\t\t\tif ( groupMaterial && groupMaterial.visible ) {\n\n\t\t\t\t\t\t\tvar depthMaterial = getDepthMaterial( object, groupMaterial, light, shadowCamera.near, shadowCamera.far, type );\n\n\t\t\t\t\t\t\t_renderer.renderBufferDirect( shadowCamera, null, geometry, depthMaterial, object, group );\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t} else if ( material.visible ) {\n\n\t\t\t\t\tvar depthMaterial = getDepthMaterial( object, material, light, shadowCamera.near, shadowCamera.far, type );\n\n\t\t\t\t\t_renderer.renderBufferDirect( shadowCamera, null, geometry, depthMaterial, object, null );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\tvar children = object.children;\n\n\t\tfor ( var i = 0, l = children.length; i < l; i ++ ) {\n\n\t\t\trenderObject( children[ i ], camera, shadowCamera, light, type );\n\n\t\t}\n\n\t}\n\n}\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction WebGLState( gl, extensions, capabilities ) {\n\n\tvar isWebGL2 = capabilities.isWebGL2;\n\n\tfunction ColorBuffer() {\n\n\t\tvar locked = false;\n\n\t\tvar color = new Vector4();\n\t\tvar currentColorMask = null;\n\t\tvar currentColorClear = new Vector4( 0, 0, 0, 0 );\n\n\t\treturn {\n\n\t\t\tsetMask: function ( colorMask ) {\n\n\t\t\t\tif ( currentColorMask !== colorMask && ! locked ) {\n\n\t\t\t\t\tgl.colorMask( colorMask, colorMask, colorMask, colorMask );\n\t\t\t\t\tcurrentColorMask = colorMask;\n\n\t\t\t\t}\n\n\t\t\t},\n\n\t\t\tsetLocked: function ( lock ) {\n\n\t\t\t\tlocked = lock;\n\n\t\t\t},\n\n\t\t\tsetClear: function ( r, g, b, a, premultipliedAlpha ) {\n\n\t\t\t\tif ( premultipliedAlpha === true ) {\n\n\t\t\t\t\tr *= a; g *= a; b *= a;\n\n\t\t\t\t}\n\n\t\t\t\tcolor.set( r, g, b, a );\n\n\t\t\t\tif ( currentColorClear.equals( color ) === false ) {\n\n\t\t\t\t\tgl.clearColor( r, g, b, a );\n\t\t\t\t\tcurrentColorClear.copy( color );\n\n\t\t\t\t}\n\n\t\t\t},\n\n\t\t\treset: function () {\n\n\t\t\t\tlocked = false;\n\n\t\t\t\tcurrentColorMask = null;\n\t\t\t\tcurrentColorClear.set( - 1, 0, 0, 0 ); // set to invalid state\n\n\t\t\t}\n\n\t\t};\n\n\t}\n\n\tfunction DepthBuffer() {\n\n\t\tvar locked = false;\n\n\t\tvar currentDepthMask = null;\n\t\tvar currentDepthFunc = null;\n\t\tvar currentDepthClear = null;\n\n\t\treturn {\n\n\t\t\tsetTest: function ( depthTest ) {\n\n\t\t\t\tif ( depthTest ) {\n\n\t\t\t\t\tenable( 2929 );\n\n\t\t\t\t} else {\n\n\t\t\t\t\tdisable( 2929 );\n\n\t\t\t\t}\n\n\t\t\t},\n\n\t\t\tsetMask: function ( depthMask ) {\n\n\t\t\t\tif ( currentDepthMask !== depthMask && ! locked ) {\n\n\t\t\t\t\tgl.depthMask( depthMask );\n\t\t\t\t\tcurrentDepthMask = depthMask;\n\n\t\t\t\t}\n\n\t\t\t},\n\n\t\t\tsetFunc: function ( depthFunc ) {\n\n\t\t\t\tif ( currentDepthFunc !== depthFunc ) {\n\n\t\t\t\t\tif ( depthFunc ) {\n\n\t\t\t\t\t\tswitch ( depthFunc ) {\n\n\t\t\t\t\t\t\tcase NeverDepth:\n\n\t\t\t\t\t\t\t\tgl.depthFunc( 512 );\n\t\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\t\tcase AlwaysDepth:\n\n\t\t\t\t\t\t\t\tgl.depthFunc( 519 );\n\t\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\t\tcase LessDepth:\n\n\t\t\t\t\t\t\t\tgl.depthFunc( 513 );\n\t\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\t\tcase LessEqualDepth:\n\n\t\t\t\t\t\t\t\tgl.depthFunc( 515 );\n\t\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\t\tcase EqualDepth:\n\n\t\t\t\t\t\t\t\tgl.depthFunc( 514 );\n\t\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\t\tcase GreaterEqualDepth:\n\n\t\t\t\t\t\t\t\tgl.depthFunc( 518 );\n\t\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\t\tcase GreaterDepth:\n\n\t\t\t\t\t\t\t\tgl.depthFunc( 516 );\n\t\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\t\tcase NotEqualDepth:\n\n\t\t\t\t\t\t\t\tgl.depthFunc( 517 );\n\t\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\t\tdefault:\n\n\t\t\t\t\t\t\t\tgl.depthFunc( 515 );\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\tgl.depthFunc( 515 );\n\n\t\t\t\t\t}\n\n\t\t\t\t\tcurrentDepthFunc = depthFunc;\n\n\t\t\t\t}\n\n\t\t\t},\n\n\t\t\tsetLocked: function ( lock ) {\n\n\t\t\t\tlocked = lock;\n\n\t\t\t},\n\n\t\t\tsetClear: function ( depth ) {\n\n\t\t\t\tif ( currentDepthClear !== depth ) {\n\n\t\t\t\t\tgl.clearDepth( depth );\n\t\t\t\t\tcurrentDepthClear = depth;\n\n\t\t\t\t}\n\n\t\t\t},\n\n\t\t\treset: function () {\n\n\t\t\t\tlocked = false;\n\n\t\t\t\tcurrentDepthMask = null;\n\t\t\t\tcurrentDepthFunc = null;\n\t\t\t\tcurrentDepthClear = null;\n\n\t\t\t}\n\n\t\t};\n\n\t}\n\n\tfunction StencilBuffer() {\n\n\t\tvar locked = false;\n\n\t\tvar currentStencilMask = null;\n\t\tvar currentStencilFunc = null;\n\t\tvar currentStencilRef = null;\n\t\tvar currentStencilFuncMask = null;\n\t\tvar currentStencilFail = null;\n\t\tvar currentStencilZFail = null;\n\t\tvar currentStencilZPass = null;\n\t\tvar currentStencilClear = null;\n\n\t\treturn {\n\n\t\t\tsetTest: function ( stencilTest ) {\n\n\t\t\t\tif ( ! locked ) {\n\n\t\t\t\t\tif ( stencilTest ) {\n\n\t\t\t\t\t\tenable( 2960 );\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\tdisable( 2960 );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t},\n\n\t\t\tsetMask: function ( stencilMask ) {\n\n\t\t\t\tif ( currentStencilMask !== stencilMask && ! locked ) {\n\n\t\t\t\t\tgl.stencilMask( stencilMask );\n\t\t\t\t\tcurrentStencilMask = stencilMask;\n\n\t\t\t\t}\n\n\t\t\t},\n\n\t\t\tsetFunc: function ( stencilFunc, stencilRef, stencilMask ) {\n\n\t\t\t\tif ( currentStencilFunc !== stencilFunc ||\n\t\t\t\t     currentStencilRef \t!== stencilRef \t||\n\t\t\t\t     currentStencilFuncMask !== stencilMask ) {\n\n\t\t\t\t\tgl.stencilFunc( stencilFunc, stencilRef, stencilMask );\n\n\t\t\t\t\tcurrentStencilFunc = stencilFunc;\n\t\t\t\t\tcurrentStencilRef = stencilRef;\n\t\t\t\t\tcurrentStencilFuncMask = stencilMask;\n\n\t\t\t\t}\n\n\t\t\t},\n\n\t\t\tsetOp: function ( stencilFail, stencilZFail, stencilZPass ) {\n\n\t\t\t\tif ( currentStencilFail\t !== stencilFail \t||\n\t\t\t\t     currentStencilZFail !== stencilZFail ||\n\t\t\t\t     currentStencilZPass !== stencilZPass ) {\n\n\t\t\t\t\tgl.stencilOp( stencilFail, stencilZFail, stencilZPass );\n\n\t\t\t\t\tcurrentStencilFail = stencilFail;\n\t\t\t\t\tcurrentStencilZFail = stencilZFail;\n\t\t\t\t\tcurrentStencilZPass = stencilZPass;\n\n\t\t\t\t}\n\n\t\t\t},\n\n\t\t\tsetLocked: function ( lock ) {\n\n\t\t\t\tlocked = lock;\n\n\t\t\t},\n\n\t\t\tsetClear: function ( stencil ) {\n\n\t\t\t\tif ( currentStencilClear !== stencil ) {\n\n\t\t\t\t\tgl.clearStencil( stencil );\n\t\t\t\t\tcurrentStencilClear = stencil;\n\n\t\t\t\t}\n\n\t\t\t},\n\n\t\t\treset: function () {\n\n\t\t\t\tlocked = false;\n\n\t\t\t\tcurrentStencilMask = null;\n\t\t\t\tcurrentStencilFunc = null;\n\t\t\t\tcurrentStencilRef = null;\n\t\t\t\tcurrentStencilFuncMask = null;\n\t\t\t\tcurrentStencilFail = null;\n\t\t\t\tcurrentStencilZFail = null;\n\t\t\t\tcurrentStencilZPass = null;\n\t\t\t\tcurrentStencilClear = null;\n\n\t\t\t}\n\n\t\t};\n\n\t}\n\n\t//\n\n\tvar colorBuffer = new ColorBuffer();\n\tvar depthBuffer = new DepthBuffer();\n\tvar stencilBuffer = new StencilBuffer();\n\n\tvar maxVertexAttributes = gl.getParameter( 34921 );\n\tvar newAttributes = new Uint8Array( maxVertexAttributes );\n\tvar enabledAttributes = new Uint8Array( maxVertexAttributes );\n\tvar attributeDivisors = new Uint8Array( maxVertexAttributes );\n\n\tvar enabledCapabilities = {};\n\n\tvar currentProgram = null;\n\n\tvar currentBlendingEnabled = null;\n\tvar currentBlending = null;\n\tvar currentBlendEquation = null;\n\tvar currentBlendSrc = null;\n\tvar currentBlendDst = null;\n\tvar currentBlendEquationAlpha = null;\n\tvar currentBlendSrcAlpha = null;\n\tvar currentBlendDstAlpha = null;\n\tvar currentPremultipledAlpha = false;\n\n\tvar currentFlipSided = null;\n\tvar currentCullFace = null;\n\n\tvar currentLineWidth = null;\n\n\tvar currentPolygonOffsetFactor = null;\n\tvar currentPolygonOffsetUnits = null;\n\n\tvar maxTextures = gl.getParameter( 35661 );\n\n\tvar lineWidthAvailable = false;\n\tvar version = 0;\n\tvar glVersion = gl.getParameter( 7938 );\n\n\tif ( glVersion.indexOf( 'WebGL' ) !== - 1 ) {\n\n\t\tversion = parseFloat( /^WebGL\\ ([0-9])/.exec( glVersion )[ 1 ] );\n\t\tlineWidthAvailable = ( version >= 1.0 );\n\n\t} else if ( glVersion.indexOf( 'OpenGL ES' ) !== - 1 ) {\n\n\t\tversion = parseFloat( /^OpenGL\\ ES\\ ([0-9])/.exec( glVersion )[ 1 ] );\n\t\tlineWidthAvailable = ( version >= 2.0 );\n\n\t}\n\n\tvar currentTextureSlot = null;\n\tvar currentBoundTextures = {};\n\n\tvar currentScissor = new Vector4();\n\tvar currentViewport = new Vector4();\n\n\tfunction createTexture( type, target, count ) {\n\n\t\tvar data = new Uint8Array( 4 ); // 4 is required to match default unpack alignment of 4.\n\t\tvar texture = gl.createTexture();\n\n\t\tgl.bindTexture( type, texture );\n\t\tgl.texParameteri( type, 10241, 9728 );\n\t\tgl.texParameteri( type, 10240, 9728 );\n\n\t\tfor ( var i = 0; i < count; i ++ ) {\n\n\t\t\tgl.texImage2D( target + i, 0, 6408, 1, 1, 0, 6408, 5121, data );\n\n\t\t}\n\n\t\treturn texture;\n\n\t}\n\n\tvar emptyTextures = {};\n\temptyTextures[ 3553 ] = createTexture( 3553, 3553, 1 );\n\temptyTextures[ 34067 ] = createTexture( 34067, 34069, 6 );\n\n\t// init\n\n\tcolorBuffer.setClear( 0, 0, 0, 1 );\n\tdepthBuffer.setClear( 1 );\n\tstencilBuffer.setClear( 0 );\n\n\tenable( 2929 );\n\tdepthBuffer.setFunc( LessEqualDepth );\n\n\tsetFlipSided( false );\n\tsetCullFace( CullFaceBack );\n\tenable( 2884 );\n\n\tsetBlending( NoBlending );\n\n\t//\n\n\tfunction initAttributes() {\n\n\t\tfor ( var i = 0, l = newAttributes.length; i < l; i ++ ) {\n\n\t\t\tnewAttributes[ i ] = 0;\n\n\t\t}\n\n\t}\n\n\tfunction enableAttribute( attribute ) {\n\n\t\tenableAttributeAndDivisor( attribute, 0 );\n\n\t}\n\n\tfunction enableAttributeAndDivisor( attribute, meshPerAttribute ) {\n\n\t\tnewAttributes[ attribute ] = 1;\n\n\t\tif ( enabledAttributes[ attribute ] === 0 ) {\n\n\t\t\tgl.enableVertexAttribArray( attribute );\n\t\t\tenabledAttributes[ attribute ] = 1;\n\n\t\t}\n\n\t\tif ( attributeDivisors[ attribute ] !== meshPerAttribute ) {\n\n\t\t\tvar extension = isWebGL2 ? gl : extensions.get( 'ANGLE_instanced_arrays' );\n\n\t\t\textension[ isWebGL2 ? 'vertexAttribDivisor' : 'vertexAttribDivisorANGLE' ]( attribute, meshPerAttribute );\n\t\t\tattributeDivisors[ attribute ] = meshPerAttribute;\n\n\t\t}\n\n\t}\n\n\tfunction disableUnusedAttributes() {\n\n\t\tfor ( var i = 0, l = enabledAttributes.length; i !== l; ++ i ) {\n\n\t\t\tif ( enabledAttributes[ i ] !== newAttributes[ i ] ) {\n\n\t\t\t\tgl.disableVertexAttribArray( i );\n\t\t\t\tenabledAttributes[ i ] = 0;\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\tfunction enable( id ) {\n\n\t\tif ( enabledCapabilities[ id ] !== true ) {\n\n\t\t\tgl.enable( id );\n\t\t\tenabledCapabilities[ id ] = true;\n\n\t\t}\n\n\t}\n\n\tfunction disable( id ) {\n\n\t\tif ( enabledCapabilities[ id ] !== false ) {\n\n\t\t\tgl.disable( id );\n\t\t\tenabledCapabilities[ id ] = false;\n\n\t\t}\n\n\t}\n\n\tfunction useProgram( program ) {\n\n\t\tif ( currentProgram !== program ) {\n\n\t\t\tgl.useProgram( program );\n\n\t\t\tcurrentProgram = program;\n\n\t\t\treturn true;\n\n\t\t}\n\n\t\treturn false;\n\n\t}\n\n\tvar equationToGL = {\n\t\t[ AddEquation ]: 32774,\n\t\t[ SubtractEquation ]: 32778,\n\t\t[ ReverseSubtractEquation ]: 32779\n\t};\n\n\tif ( isWebGL2 ) {\n\n\t\tequationToGL[ MinEquation ] = 32775;\n\t\tequationToGL[ MaxEquation ] = 32776;\n\n\t} else {\n\n\t\tvar extension = extensions.get( 'EXT_blend_minmax' );\n\n\t\tif ( extension !== null ) {\n\n\t\t\tequationToGL[ MinEquation ] = extension.MIN_EXT;\n\t\t\tequationToGL[ MaxEquation ] = extension.MAX_EXT;\n\n\t\t}\n\n\t}\n\n\tvar factorToGL = {\n\t\t[ ZeroFactor ]: 0,\n\t\t[ OneFactor ]: 1,\n\t\t[ SrcColorFactor ]: 768,\n\t\t[ SrcAlphaFactor ]: 770,\n\t\t[ SrcAlphaSaturateFactor ]: 776,\n\t\t[ DstColorFactor ]: 774,\n\t\t[ DstAlphaFactor ]: 772,\n\t\t[ OneMinusSrcColorFactor ]: 769,\n\t\t[ OneMinusSrcAlphaFactor ]: 771,\n\t\t[ OneMinusDstColorFactor ]: 775,\n\t\t[ OneMinusDstAlphaFactor ]: 773\n\t};\n\n\tfunction setBlending( blending, blendEquation, blendSrc, blendDst, blendEquationAlpha, blendSrcAlpha, blendDstAlpha, premultipliedAlpha ) {\n\n\t\tif ( blending === NoBlending ) {\n\n\t\t\tif ( currentBlendingEnabled ) {\n\n\t\t\t\tdisable( 3042 );\n\t\t\t\tcurrentBlendingEnabled = false;\n\n\t\t\t}\n\n\t\t\treturn;\n\n\t\t}\n\n\t\tif ( ! currentBlendingEnabled ) {\n\n\t\t\tenable( 3042 );\n\t\t\tcurrentBlendingEnabled = true;\n\n\t\t}\n\n\t\tif ( blending !== CustomBlending ) {\n\n\t\t\tif ( blending !== currentBlending || premultipliedAlpha !== currentPremultipledAlpha ) {\n\n\t\t\t\tif ( currentBlendEquation !== AddEquation || currentBlendEquationAlpha !== AddEquation ) {\n\n\t\t\t\t\tgl.blendEquation( 32774 );\n\n\t\t\t\t\tcurrentBlendEquation = AddEquation;\n\t\t\t\t\tcurrentBlendEquationAlpha = AddEquation;\n\n\t\t\t\t}\n\n\t\t\t\tif ( premultipliedAlpha ) {\n\n\t\t\t\t\tswitch ( blending ) {\n\n\t\t\t\t\t\tcase NormalBlending:\n\t\t\t\t\t\t\tgl.blendFuncSeparate( 1, 771, 1, 771 );\n\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\tcase AdditiveBlending:\n\t\t\t\t\t\t\tgl.blendFunc( 1, 1 );\n\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\tcase SubtractiveBlending:\n\t\t\t\t\t\t\tgl.blendFuncSeparate( 0, 0, 769, 771 );\n\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\tcase MultiplyBlending:\n\t\t\t\t\t\t\tgl.blendFuncSeparate( 0, 768, 0, 770 );\n\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\tdefault:\n\t\t\t\t\t\t\tconsole.error( 'THREE.WebGLState: Invalid blending: ', blending );\n\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t}\n\n\t\t\t\t} else {\n\n\t\t\t\t\tswitch ( blending ) {\n\n\t\t\t\t\t\tcase NormalBlending:\n\t\t\t\t\t\t\tgl.blendFuncSeparate( 770, 771, 1, 771 );\n\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\tcase AdditiveBlending:\n\t\t\t\t\t\t\tgl.blendFunc( 770, 1 );\n\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\tcase SubtractiveBlending:\n\t\t\t\t\t\t\tgl.blendFunc( 0, 769 );\n\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\tcase MultiplyBlending:\n\t\t\t\t\t\t\tgl.blendFunc( 0, 768 );\n\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\tdefault:\n\t\t\t\t\t\t\tconsole.error( 'THREE.WebGLState: Invalid blending: ', blending );\n\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\tcurrentBlendSrc = null;\n\t\t\t\tcurrentBlendDst = null;\n\t\t\t\tcurrentBlendSrcAlpha = null;\n\t\t\t\tcurrentBlendDstAlpha = null;\n\n\t\t\t\tcurrentBlending = blending;\n\t\t\t\tcurrentPremultipledAlpha = premultipliedAlpha;\n\n\t\t\t}\n\n\t\t\treturn;\n\n\t\t}\n\n\t\t// custom blending\n\n\t\tblendEquationAlpha = blendEquationAlpha || blendEquation;\n\t\tblendSrcAlpha = blendSrcAlpha || blendSrc;\n\t\tblendDstAlpha = blendDstAlpha || blendDst;\n\n\t\tif ( blendEquation !== currentBlendEquation || blendEquationAlpha !== currentBlendEquationAlpha ) {\n\n\t\t\tgl.blendEquationSeparate( equationToGL[ blendEquation ], equationToGL[ blendEquationAlpha ] );\n\n\t\t\tcurrentBlendEquation = blendEquation;\n\t\t\tcurrentBlendEquationAlpha = blendEquationAlpha;\n\n\t\t}\n\n\t\tif ( blendSrc !== currentBlendSrc || blendDst !== currentBlendDst || blendSrcAlpha !== currentBlendSrcAlpha || blendDstAlpha !== currentBlendDstAlpha ) {\n\n\t\t\tgl.blendFuncSeparate( factorToGL[ blendSrc ], factorToGL[ blendDst ], factorToGL[ blendSrcAlpha ], factorToGL[ blendDstAlpha ] );\n\n\t\t\tcurrentBlendSrc = blendSrc;\n\t\t\tcurrentBlendDst = blendDst;\n\t\t\tcurrentBlendSrcAlpha = blendSrcAlpha;\n\t\t\tcurrentBlendDstAlpha = blendDstAlpha;\n\n\t\t}\n\n\t\tcurrentBlending = blending;\n\t\tcurrentPremultipledAlpha = null;\n\n\t}\n\n\tfunction setMaterial( material, frontFaceCW ) {\n\n\t\tmaterial.side === DoubleSide\n\t\t\t? disable( 2884 )\n\t\t\t: enable( 2884 );\n\n\t\tvar flipSided = ( material.side === BackSide );\n\t\tif ( frontFaceCW ) flipSided = ! flipSided;\n\n\t\tsetFlipSided( flipSided );\n\n\t\t( material.blending === NormalBlending && material.transparent === false )\n\t\t\t? setBlending( NoBlending )\n\t\t\t: setBlending( material.blending, material.blendEquation, material.blendSrc, material.blendDst, material.blendEquationAlpha, material.blendSrcAlpha, material.blendDstAlpha, material.premultipliedAlpha );\n\n\t\tdepthBuffer.setFunc( material.depthFunc );\n\t\tdepthBuffer.setTest( material.depthTest );\n\t\tdepthBuffer.setMask( material.depthWrite );\n\t\tcolorBuffer.setMask( material.colorWrite );\n\n\t\tvar stencilWrite = material.stencilWrite;\n\t\tstencilBuffer.setTest( stencilWrite );\n\t\tif ( stencilWrite ) {\n\n\t\t\tstencilBuffer.setMask( material.stencilWriteMask );\n\t\t\tstencilBuffer.setFunc( material.stencilFunc, material.stencilRef, material.stencilFuncMask );\n\t\t\tstencilBuffer.setOp( material.stencilFail, material.stencilZFail, material.stencilZPass );\n\n\t\t}\n\n\t\tsetPolygonOffset( material.polygonOffset, material.polygonOffsetFactor, material.polygonOffsetUnits );\n\n\t}\n\n\t//\n\n\tfunction setFlipSided( flipSided ) {\n\n\t\tif ( currentFlipSided !== flipSided ) {\n\n\t\t\tif ( flipSided ) {\n\n\t\t\t\tgl.frontFace( 2304 );\n\n\t\t\t} else {\n\n\t\t\t\tgl.frontFace( 2305 );\n\n\t\t\t}\n\n\t\t\tcurrentFlipSided = flipSided;\n\n\t\t}\n\n\t}\n\n\tfunction setCullFace( cullFace ) {\n\n\t\tif ( cullFace !== CullFaceNone ) {\n\n\t\t\tenable( 2884 );\n\n\t\t\tif ( cullFace !== currentCullFace ) {\n\n\t\t\t\tif ( cullFace === CullFaceBack ) {\n\n\t\t\t\t\tgl.cullFace( 1029 );\n\n\t\t\t\t} else if ( cullFace === CullFaceFront ) {\n\n\t\t\t\t\tgl.cullFace( 1028 );\n\n\t\t\t\t} else {\n\n\t\t\t\t\tgl.cullFace( 1032 );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\tdisable( 2884 );\n\n\t\t}\n\n\t\tcurrentCullFace = cullFace;\n\n\t}\n\n\tfunction setLineWidth( width ) {\n\n\t\tif ( width !== currentLineWidth ) {\n\n\t\t\tif ( lineWidthAvailable ) gl.lineWidth( width );\n\n\t\t\tcurrentLineWidth = width;\n\n\t\t}\n\n\t}\n\n\tfunction setPolygonOffset( polygonOffset, factor, units ) {\n\n\t\tif ( polygonOffset ) {\n\n\t\t\tenable( 32823 );\n\n\t\t\tif ( currentPolygonOffsetFactor !== factor || currentPolygonOffsetUnits !== units ) {\n\n\t\t\t\tgl.polygonOffset( factor, units );\n\n\t\t\t\tcurrentPolygonOffsetFactor = factor;\n\t\t\t\tcurrentPolygonOffsetUnits = units;\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\tdisable( 32823 );\n\n\t\t}\n\n\t}\n\n\tfunction setScissorTest( scissorTest ) {\n\n\t\tif ( scissorTest ) {\n\n\t\t\tenable( 3089 );\n\n\t\t} else {\n\n\t\t\tdisable( 3089 );\n\n\t\t}\n\n\t}\n\n\t// texture\n\n\tfunction activeTexture( webglSlot ) {\n\n\t\tif ( webglSlot === undefined ) webglSlot = 33984 + maxTextures - 1;\n\n\t\tif ( currentTextureSlot !== webglSlot ) {\n\n\t\t\tgl.activeTexture( webglSlot );\n\t\t\tcurrentTextureSlot = webglSlot;\n\n\t\t}\n\n\t}\n\n\tfunction bindTexture( webglType, webglTexture ) {\n\n\t\tif ( currentTextureSlot === null ) {\n\n\t\t\tactiveTexture();\n\n\t\t}\n\n\t\tvar boundTexture = currentBoundTextures[ currentTextureSlot ];\n\n\t\tif ( boundTexture === undefined ) {\n\n\t\t\tboundTexture = { type: undefined, texture: undefined };\n\t\t\tcurrentBoundTextures[ currentTextureSlot ] = boundTexture;\n\n\t\t}\n\n\t\tif ( boundTexture.type !== webglType || boundTexture.texture !== webglTexture ) {\n\n\t\t\tgl.bindTexture( webglType, webglTexture || emptyTextures[ webglType ] );\n\n\t\t\tboundTexture.type = webglType;\n\t\t\tboundTexture.texture = webglTexture;\n\n\t\t}\n\n\t}\n\n\tfunction unbindTexture() {\n\n\t\tvar boundTexture = currentBoundTextures[ currentTextureSlot ];\n\n\t\tif ( boundTexture !== undefined && boundTexture.type !== undefined ) {\n\n\t\t\tgl.bindTexture( boundTexture.type, null );\n\n\t\t\tboundTexture.type = undefined;\n\t\t\tboundTexture.texture = undefined;\n\n\t\t}\n\n\t}\n\n\tfunction compressedTexImage2D() {\n\n\t\ttry {\n\n\t\t\tgl.compressedTexImage2D.apply( gl, arguments );\n\n\t\t} catch ( error ) {\n\n\t\t\tconsole.error( 'THREE.WebGLState:', error );\n\n\t\t}\n\n\t}\n\n\tfunction texImage2D() {\n\n\t\ttry {\n\n\t\t\tgl.texImage2D.apply( gl, arguments );\n\n\t\t} catch ( error ) {\n\n\t\t\tconsole.error( 'THREE.WebGLState:', error );\n\n\t\t}\n\n\t}\n\n\tfunction texImage3D() {\n\n\t\ttry {\n\n\t\t\tgl.texImage3D.apply( gl, arguments );\n\n\t\t} catch ( error ) {\n\n\t\t\tconsole.error( 'THREE.WebGLState:', error );\n\n\t\t}\n\n\t}\n\n\t//\n\n\tfunction scissor( scissor ) {\n\n\t\tif ( currentScissor.equals( scissor ) === false ) {\n\n\t\t\tgl.scissor( scissor.x, scissor.y, scissor.z, scissor.w );\n\t\t\tcurrentScissor.copy( scissor );\n\n\t\t}\n\n\t}\n\n\tfunction viewport( viewport ) {\n\n\t\tif ( currentViewport.equals( viewport ) === false ) {\n\n\t\t\tgl.viewport( viewport.x, viewport.y, viewport.z, viewport.w );\n\t\t\tcurrentViewport.copy( viewport );\n\n\t\t}\n\n\t}\n\n\t//\n\n\tfunction reset() {\n\n\t\tfor ( var i = 0; i < enabledAttributes.length; i ++ ) {\n\n\t\t\tif ( enabledAttributes[ i ] === 1 ) {\n\n\t\t\t\tgl.disableVertexAttribArray( i );\n\t\t\t\tenabledAttributes[ i ] = 0;\n\n\t\t\t}\n\n\t\t}\n\n\t\tenabledCapabilities = {};\n\n\t\tcurrentTextureSlot = null;\n\t\tcurrentBoundTextures = {};\n\n\t\tcurrentProgram = null;\n\n\t\tcurrentBlending = null;\n\n\t\tcurrentFlipSided = null;\n\t\tcurrentCullFace = null;\n\n\t\tcolorBuffer.reset();\n\t\tdepthBuffer.reset();\n\t\tstencilBuffer.reset();\n\n\t}\n\n\treturn {\n\n\t\tbuffers: {\n\t\t\tcolor: colorBuffer,\n\t\t\tdepth: depthBuffer,\n\t\t\tstencil: stencilBuffer\n\t\t},\n\n\t\tinitAttributes: initAttributes,\n\t\tenableAttribute: enableAttribute,\n\t\tenableAttributeAndDivisor: enableAttributeAndDivisor,\n\t\tdisableUnusedAttributes: disableUnusedAttributes,\n\t\tenable: enable,\n\t\tdisable: disable,\n\n\t\tuseProgram: useProgram,\n\n\t\tsetBlending: setBlending,\n\t\tsetMaterial: setMaterial,\n\n\t\tsetFlipSided: setFlipSided,\n\t\tsetCullFace: setCullFace,\n\n\t\tsetLineWidth: setLineWidth,\n\t\tsetPolygonOffset: setPolygonOffset,\n\n\t\tsetScissorTest: setScissorTest,\n\n\t\tactiveTexture: activeTexture,\n\t\tbindTexture: bindTexture,\n\t\tunbindTexture: unbindTexture,\n\t\tcompressedTexImage2D: compressedTexImage2D,\n\t\ttexImage2D: texImage2D,\n\t\ttexImage3D: texImage3D,\n\n\t\tscissor: scissor,\n\t\tviewport: viewport,\n\n\t\treset: reset\n\n\t};\n\n}\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction WebGLTextures( _gl, extensions, state, properties, capabilities, utils, info ) {\n\n\tvar isWebGL2 = capabilities.isWebGL2;\n\tvar maxTextures = capabilities.maxTextures;\n\tvar maxCubemapSize = capabilities.maxCubemapSize;\n\tvar maxTextureSize = capabilities.maxTextureSize;\n\tvar maxSamples = capabilities.maxSamples;\n\n\tvar _videoTextures = new WeakMap();\n\tvar _canvas;\n\n\t// cordova iOS (as of 5.0) still uses UIWebView, which provides OffscreenCanvas,\n\t// also OffscreenCanvas.getContext(\"webgl\"), but not OffscreenCanvas.getContext(\"2d\")!\n\t// Some implementations may only implement OffscreenCanvas partially (e.g. lacking 2d).\n\n\tvar useOffscreenCanvas = false;\n\n\ttry {\n\n\t\tuseOffscreenCanvas = typeof OffscreenCanvas !== 'undefined'\n\t\t\t&& ( new OffscreenCanvas( 1, 1 ).getContext( \"2d\" ) ) !== null;\n\n\t} catch ( err ) {\n\n\t\t// Ignore any errors\n\n\t}\n\n\tfunction createCanvas( width, height ) {\n\n\t\t// Use OffscreenCanvas when available. Specially needed in web workers\n\n\t\treturn useOffscreenCanvas ?\n\t\t\tnew OffscreenCanvas( width, height ) :\n\t\t\tdocument.createElementNS( 'http://www.w3.org/1999/xhtml', 'canvas' );\n\n\t}\n\n\tfunction resizeImage( image, needsPowerOfTwo, needsNewCanvas, maxSize ) {\n\n\t\tvar scale = 1;\n\n\t\t// handle case if texture exceeds max size\n\n\t\tif ( image.width > maxSize || image.height > maxSize ) {\n\n\t\t\tscale = maxSize / Math.max( image.width, image.height );\n\n\t\t}\n\n\t\t// only perform resize if necessary\n\n\t\tif ( scale < 1 || needsPowerOfTwo === true ) {\n\n\t\t\t// only perform resize for certain image types\n\n\t\t\tif ( ( typeof HTMLImageElement !== 'undefined' && image instanceof HTMLImageElement ) ||\n\t\t\t\t( typeof HTMLCanvasElement !== 'undefined' && image instanceof HTMLCanvasElement ) ||\n\t\t\t\t( typeof ImageBitmap !== 'undefined' && image instanceof ImageBitmap ) ) {\n\n\t\t\t\tvar floor = needsPowerOfTwo ? MathUtils.floorPowerOfTwo : Math.floor;\n\n\t\t\t\tvar width = floor( scale * image.width );\n\t\t\t\tvar height = floor( scale * image.height );\n\n\t\t\t\tif ( _canvas === undefined ) _canvas = createCanvas( width, height );\n\n\t\t\t\t// cube textures can't reuse the same canvas\n\n\t\t\t\tvar canvas = needsNewCanvas ? createCanvas( width, height ) : _canvas;\n\n\t\t\t\tcanvas.width = width;\n\t\t\t\tcanvas.height = height;\n\n\t\t\t\tvar context = canvas.getContext( '2d' );\n\t\t\t\tcontext.drawImage( image, 0, 0, width, height );\n\n\t\t\t\tconsole.warn( 'THREE.WebGLRenderer: Texture has been resized from (' + image.width + 'x' + image.height + ') to (' + width + 'x' + height + ').' );\n\n\t\t\t\treturn canvas;\n\n\t\t\t} else {\n\n\t\t\t\tif ( 'data' in image ) {\n\n\t\t\t\t\tconsole.warn( 'THREE.WebGLRenderer: Image in DataTexture is too big (' + image.width + 'x' + image.height + ').' );\n\n\t\t\t\t}\n\n\t\t\t\treturn image;\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn image;\n\n\t}\n\n\tfunction isPowerOfTwo( image ) {\n\n\t\treturn MathUtils.isPowerOfTwo( image.width ) && MathUtils.isPowerOfTwo( image.height );\n\n\t}\n\n\tfunction textureNeedsPowerOfTwo( texture ) {\n\n\t\tif ( isWebGL2 ) return false;\n\n\t\treturn ( texture.wrapS !== ClampToEdgeWrapping || texture.wrapT !== ClampToEdgeWrapping ) ||\n\t\t\t( texture.minFilter !== NearestFilter && texture.minFilter !== LinearFilter );\n\n\t}\n\n\tfunction textureNeedsGenerateMipmaps( texture, supportsMips ) {\n\n\t\treturn texture.generateMipmaps && supportsMips &&\n\t\t\ttexture.minFilter !== NearestFilter && texture.minFilter !== LinearFilter;\n\n\t}\n\n\tfunction generateMipmap( target, texture, width, height ) {\n\n\t\t_gl.generateMipmap( target );\n\n\t\tvar textureProperties = properties.get( texture );\n\n\t\t// Note: Math.log( x ) * Math.LOG2E used instead of Math.log2( x ) which is not supported by IE11\n\t\ttextureProperties.__maxMipLevel = Math.log( Math.max( width, height ) ) * Math.LOG2E;\n\n\t}\n\n\tfunction getInternalFormat( internalFormatName, glFormat, glType ) {\n\n\t\tif ( isWebGL2 === false ) return glFormat;\n\n\t\tif ( internalFormatName !== null ) {\n\n\t\t\tif ( _gl[ internalFormatName ] !== undefined ) return _gl[ internalFormatName ];\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: Attempt to use non-existing WebGL internal format \\'' + internalFormatName + '\\'' );\n\n\t\t}\n\n\t\tvar internalFormat = glFormat;\n\n\t\tif ( glFormat === 6403 ) {\n\n\t\t\tif ( glType === 5126 ) internalFormat = 33326;\n\t\t\tif ( glType === 5131 ) internalFormat = 33325;\n\t\t\tif ( glType === 5121 ) internalFormat = 33321;\n\n\t\t}\n\n\t\tif ( glFormat === 6407 ) {\n\n\t\t\tif ( glType === 5126 ) internalFormat = 34837;\n\t\t\tif ( glType === 5131 ) internalFormat = 34843;\n\t\t\tif ( glType === 5121 ) internalFormat = 32849;\n\n\t\t}\n\n\t\tif ( glFormat === 6408 ) {\n\n\t\t\tif ( glType === 5126 ) internalFormat = 34836;\n\t\t\tif ( glType === 5131 ) internalFormat = 34842;\n\t\t\tif ( glType === 5121 ) internalFormat = 32856;\n\n\t\t}\n\n\t\tif ( internalFormat === 33325 || internalFormat === 33326 ||\n\t\t\tinternalFormat === 34842 || internalFormat === 34836 ) {\n\n\t\t\textensions.get( 'EXT_color_buffer_float' );\n\n\t\t} else if ( internalFormat === 34843 || internalFormat === 34837 ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: Floating point textures with RGB format not supported. Please use RGBA instead.' );\n\n\t\t}\n\n\t\treturn internalFormat;\n\n\t}\n\n\t// Fallback filters for non-power-of-2 textures\n\n\tfunction filterFallback( f ) {\n\n\t\tif ( f === NearestFilter || f === NearestMipmapNearestFilter || f === NearestMipmapLinearFilter ) {\n\n\t\t\treturn 9728;\n\n\t\t}\n\n\t\treturn 9729;\n\n\t}\n\n\t//\n\n\tfunction onTextureDispose( event ) {\n\n\t\tvar texture = event.target;\n\n\t\ttexture.removeEventListener( 'dispose', onTextureDispose );\n\n\t\tdeallocateTexture( texture );\n\n\t\tif ( texture.isVideoTexture ) {\n\n\t\t\t_videoTextures.delete( texture );\n\n\t\t}\n\n\t\tinfo.memory.textures --;\n\n\t}\n\n\tfunction onRenderTargetDispose( event ) {\n\n\t\tvar renderTarget = event.target;\n\n\t\trenderTarget.removeEventListener( 'dispose', onRenderTargetDispose );\n\n\t\tdeallocateRenderTarget( renderTarget );\n\n\t\tinfo.memory.textures --;\n\n\t}\n\n\t//\n\n\tfunction deallocateTexture( texture ) {\n\n\t\tvar textureProperties = properties.get( texture );\n\n\t\tif ( textureProperties.__webglInit === undefined ) return;\n\n\t\t_gl.deleteTexture( textureProperties.__webglTexture );\n\n\t\tproperties.remove( texture );\n\n\t}\n\n\tfunction deallocateRenderTarget( renderTarget ) {\n\n\t\tvar renderTargetProperties = properties.get( renderTarget );\n\t\tvar textureProperties = properties.get( renderTarget.texture );\n\n\t\tif ( ! renderTarget ) return;\n\n\t\tif ( textureProperties.__webglTexture !== undefined ) {\n\n\t\t\t_gl.deleteTexture( textureProperties.__webglTexture );\n\n\t\t}\n\n\t\tif ( renderTarget.depthTexture ) {\n\n\t\t\trenderTarget.depthTexture.dispose();\n\n\t\t}\n\n\t\tif ( renderTarget.isWebGLCubeRenderTarget ) {\n\n\t\t\tfor ( var i = 0; i < 6; i ++ ) {\n\n\t\t\t\t_gl.deleteFramebuffer( renderTargetProperties.__webglFramebuffer[ i ] );\n\t\t\t\tif ( renderTargetProperties.__webglDepthbuffer ) _gl.deleteRenderbuffer( renderTargetProperties.__webglDepthbuffer[ i ] );\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\t_gl.deleteFramebuffer( renderTargetProperties.__webglFramebuffer );\n\t\t\tif ( renderTargetProperties.__webglDepthbuffer ) _gl.deleteRenderbuffer( renderTargetProperties.__webglDepthbuffer );\n\n\t\t}\n\n\t\tproperties.remove( renderTarget.texture );\n\t\tproperties.remove( renderTarget );\n\n\t}\n\n\t//\n\n\tvar textureUnits = 0;\n\n\tfunction resetTextureUnits() {\n\n\t\ttextureUnits = 0;\n\n\t}\n\n\tfunction allocateTextureUnit() {\n\n\t\tvar textureUnit = textureUnits;\n\n\t\tif ( textureUnit >= maxTextures ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLTextures: Trying to use ' + textureUnit + ' texture units while this GPU supports only ' + maxTextures );\n\n\t\t}\n\n\t\ttextureUnits += 1;\n\n\t\treturn textureUnit;\n\n\t}\n\n\t//\n\n\tfunction setTexture2D( texture, slot ) {\n\n\t\tvar textureProperties = properties.get( texture );\n\n\t\tif ( texture.isVideoTexture ) updateVideoTexture( texture );\n\n\t\tif ( texture.version > 0 && textureProperties.__version !== texture.version ) {\n\n\t\t\tvar image = texture.image;\n\n\t\t\tif ( image === undefined ) {\n\n\t\t\t\tconsole.warn( 'THREE.WebGLRenderer: Texture marked for update but image is undefined' );\n\n\t\t\t} else if ( image.complete === false ) {\n\n\t\t\t\tconsole.warn( 'THREE.WebGLRenderer: Texture marked for update but image is incomplete' );\n\n\t\t\t} else {\n\n\t\t\t\tuploadTexture( textureProperties, texture, slot );\n\t\t\t\treturn;\n\n\t\t\t}\n\n\t\t}\n\n\t\tstate.activeTexture( 33984 + slot );\n\t\tstate.bindTexture( 3553, textureProperties.__webglTexture );\n\n\t}\n\n\tfunction setTexture2DArray( texture, slot ) {\n\n\t\tvar textureProperties = properties.get( texture );\n\n\t\tif ( texture.version > 0 && textureProperties.__version !== texture.version ) {\n\n\t\t\tuploadTexture( textureProperties, texture, slot );\n\t\t\treturn;\n\n\t\t}\n\n\t\tstate.activeTexture( 33984 + slot );\n\t\tstate.bindTexture( 35866, textureProperties.__webglTexture );\n\n\t}\n\n\tfunction setTexture3D( texture, slot ) {\n\n\t\tvar textureProperties = properties.get( texture );\n\n\t\tif ( texture.version > 0 && textureProperties.__version !== texture.version ) {\n\n\t\t\tuploadTexture( textureProperties, texture, slot );\n\t\t\treturn;\n\n\t\t}\n\n\t\tstate.activeTexture( 33984 + slot );\n\t\tstate.bindTexture( 32879, textureProperties.__webglTexture );\n\n\t}\n\n\tfunction setTextureCube( texture, slot ) {\n\n\t\tif ( texture.image.length !== 6 ) return;\n\n\t\tvar textureProperties = properties.get( texture );\n\n\t\tif ( texture.version > 0 && textureProperties.__version !== texture.version ) {\n\n\t\t\tinitTexture( textureProperties, texture );\n\n\t\t\tstate.activeTexture( 33984 + slot );\n\t\t\tstate.bindTexture( 34067, textureProperties.__webglTexture );\n\n\t\t\t_gl.pixelStorei( 37440, texture.flipY );\n\n\t\t\tvar isCompressed = ( texture && ( texture.isCompressedTexture || texture.image[ 0 ].isCompressedTexture ) );\n\t\t\tvar isDataTexture = ( texture.image[ 0 ] && texture.image[ 0 ].isDataTexture );\n\n\t\t\tvar cubeImage = [];\n\n\t\t\tfor ( var i = 0; i < 6; i ++ ) {\n\n\t\t\t\tif ( ! isCompressed && ! isDataTexture ) {\n\n\t\t\t\t\tcubeImage[ i ] = resizeImage( texture.image[ i ], false, true, maxCubemapSize );\n\n\t\t\t\t} else {\n\n\t\t\t\t\tcubeImage[ i ] = isDataTexture ? texture.image[ i ].image : texture.image[ i ];\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tvar image = cubeImage[ 0 ],\n\t\t\t\tsupportsMips = isPowerOfTwo( image ) || isWebGL2,\n\t\t\t\tglFormat = utils.convert( texture.format ),\n\t\t\t\tglType = utils.convert( texture.type ),\n\t\t\t\tglInternalFormat = getInternalFormat( texture.internalFormat, glFormat, glType );\n\n\t\t\tsetTextureParameters( 34067, texture, supportsMips );\n\n\t\t\tvar mipmaps;\n\n\t\t\tif ( isCompressed ) {\n\n\t\t\t\tfor ( var i = 0; i < 6; i ++ ) {\n\n\t\t\t\t\tmipmaps = cubeImage[ i ].mipmaps;\n\n\t\t\t\t\tfor ( var j = 0; j < mipmaps.length; j ++ ) {\n\n\t\t\t\t\t\tvar mipmap = mipmaps[ j ];\n\n\t\t\t\t\t\tif ( texture.format !== RGBAFormat && texture.format !== RGBFormat ) {\n\n\t\t\t\t\t\t\tif ( glFormat !== null ) {\n\n\t\t\t\t\t\t\t\tstate.compressedTexImage2D( 34069 + i, j, glInternalFormat, mipmap.width, mipmap.height, 0, mipmap.data );\n\n\t\t\t\t\t\t\t} else {\n\n\t\t\t\t\t\t\t\tconsole.warn( 'THREE.WebGLRenderer: Attempt to load unsupported compressed texture format in .setTextureCube()' );\n\n\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t} else {\n\n\t\t\t\t\t\t\tstate.texImage2D( 34069 + i, j, glInternalFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data );\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\ttextureProperties.__maxMipLevel = mipmaps.length - 1;\n\n\t\t\t} else {\n\n\t\t\t\tmipmaps = texture.mipmaps;\n\n\t\t\t\tfor ( var i = 0; i < 6; i ++ ) {\n\n\t\t\t\t\tif ( isDataTexture ) {\n\n\t\t\t\t\t\tstate.texImage2D( 34069 + i, 0, glInternalFormat, cubeImage[ i ].width, cubeImage[ i ].height, 0, glFormat, glType, cubeImage[ i ].data );\n\n\t\t\t\t\t\tfor ( var j = 0; j < mipmaps.length; j ++ ) {\n\n\t\t\t\t\t\t\tvar mipmap = mipmaps[ j ];\n\t\t\t\t\t\t\tvar mipmapImage = mipmap.image[ i ].image;\n\n\t\t\t\t\t\t\tstate.texImage2D( 34069 + i, j + 1, glInternalFormat, mipmapImage.width, mipmapImage.height, 0, glFormat, glType, mipmapImage.data );\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\tstate.texImage2D( 34069 + i, 0, glInternalFormat, glFormat, glType, cubeImage[ i ] );\n\n\t\t\t\t\t\tfor ( var j = 0; j < mipmaps.length; j ++ ) {\n\n\t\t\t\t\t\t\tvar mipmap = mipmaps[ j ];\n\n\t\t\t\t\t\t\tstate.texImage2D( 34069 + i, j + 1, glInternalFormat, glFormat, glType, mipmap.image[ i ] );\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\ttextureProperties.__maxMipLevel = mipmaps.length;\n\n\t\t\t}\n\n\t\t\tif ( textureNeedsGenerateMipmaps( texture, supportsMips ) ) {\n\n\t\t\t\t// We assume images for cube map have the same size.\n\t\t\t\tgenerateMipmap( 34067, texture, image.width, image.height );\n\n\t\t\t}\n\n\t\t\ttextureProperties.__version = texture.version;\n\n\t\t\tif ( texture.onUpdate ) texture.onUpdate( texture );\n\n\t\t} else {\n\n\t\t\tstate.activeTexture( 33984 + slot );\n\t\t\tstate.bindTexture( 34067, textureProperties.__webglTexture );\n\n\t\t}\n\n\t}\n\n\tfunction setTextureCubeDynamic( texture, slot ) {\n\n\t\tstate.activeTexture( 33984 + slot );\n\t\tstate.bindTexture( 34067, properties.get( texture ).__webglTexture );\n\n\t}\n\n\tvar wrappingToGL = {\n\t\t[ RepeatWrapping ]: 10497,\n\t\t[ ClampToEdgeWrapping ]: 33071,\n\t\t[ MirroredRepeatWrapping ]: 33648\n\t};\n\n\tvar filterToGL = {\n\t\t[ NearestFilter ]: 9728,\n\t\t[ NearestMipmapNearestFilter ]: 9984,\n\t\t[ NearestMipmapLinearFilter ]: 9986,\n\n\t\t[ LinearFilter ]: 9729,\n\t\t[ LinearMipmapNearestFilter ]: 9985,\n\t\t[ LinearMipmapLinearFilter ]: 9987\n\t};\n\n\tfunction setTextureParameters( textureType, texture, supportsMips ) {\n\n\t\tif ( supportsMips ) {\n\n\t\t\t_gl.texParameteri( textureType, 10242, wrappingToGL[ texture.wrapS ] );\n\t\t\t_gl.texParameteri( textureType, 10243, wrappingToGL[ texture.wrapT ] );\n\n\t\t\tif ( textureType === 32879 || textureType === 35866 ) {\n\n\t\t\t\t_gl.texParameteri( textureType, 32882, wrappingToGL[ texture.wrapR ] );\n\n\t\t\t}\n\n\t\t\t_gl.texParameteri( textureType, 10240, filterToGL[ texture.magFilter ] );\n\t\t\t_gl.texParameteri( textureType, 10241, filterToGL[ texture.minFilter ] );\n\n\t\t} else {\n\n\t\t\t_gl.texParameteri( textureType, 10242, 33071 );\n\t\t\t_gl.texParameteri( textureType, 10243, 33071 );\n\n\t\t\tif ( textureType === 32879 || textureType === 35866 ) {\n\n\t\t\t\t_gl.texParameteri( textureType, 32882, 33071 );\n\n\t\t\t}\n\n\t\t\tif ( texture.wrapS !== ClampToEdgeWrapping || texture.wrapT !== ClampToEdgeWrapping ) {\n\n\t\t\t\tconsole.warn( 'THREE.WebGLRenderer: Texture is not power of two. Texture.wrapS and Texture.wrapT should be set to THREE.ClampToEdgeWrapping.' );\n\n\t\t\t}\n\n\t\t\t_gl.texParameteri( textureType, 10240, filterFallback( texture.magFilter ) );\n\t\t\t_gl.texParameteri( textureType, 10241, filterFallback( texture.minFilter ) );\n\n\t\t\tif ( texture.minFilter !== NearestFilter && texture.minFilter !== LinearFilter ) {\n\n\t\t\t\tconsole.warn( 'THREE.WebGLRenderer: Texture is not power of two. Texture.minFilter should be set to THREE.NearestFilter or THREE.LinearFilter.' );\n\n\t\t\t}\n\n\t\t}\n\n\t\tvar extension = extensions.get( 'EXT_texture_filter_anisotropic' );\n\n\t\tif ( extension ) {\n\n\t\t\tif ( texture.type === FloatType && extensions.get( 'OES_texture_float_linear' ) === null ) return;\n\t\t\tif ( texture.type === HalfFloatType && ( isWebGL2 || extensions.get( 'OES_texture_half_float_linear' ) ) === null ) return;\n\n\t\t\tif ( texture.anisotropy > 1 || properties.get( texture ).__currentAnisotropy ) {\n\n\t\t\t\t_gl.texParameterf( textureType, extension.TEXTURE_MAX_ANISOTROPY_EXT, Math.min( texture.anisotropy, capabilities.getMaxAnisotropy() ) );\n\t\t\t\tproperties.get( texture ).__currentAnisotropy = texture.anisotropy;\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\tfunction initTexture( textureProperties, texture ) {\n\n\t\tif ( textureProperties.__webglInit === undefined ) {\n\n\t\t\ttextureProperties.__webglInit = true;\n\n\t\t\ttexture.addEventListener( 'dispose', onTextureDispose );\n\n\t\t\ttextureProperties.__webglTexture = _gl.createTexture();\n\n\t\t\tinfo.memory.textures ++;\n\n\t\t}\n\n\t}\n\n\tfunction uploadTexture( textureProperties, texture, slot ) {\n\n\t\tvar textureType = 3553;\n\n\t\tif ( texture.isDataTexture2DArray ) textureType = 35866;\n\t\tif ( texture.isDataTexture3D ) textureType = 32879;\n\n\t\tinitTexture( textureProperties, texture );\n\n\t\tstate.activeTexture( 33984 + slot );\n\t\tstate.bindTexture( textureType, textureProperties.__webglTexture );\n\n\t\t_gl.pixelStorei( 37440, texture.flipY );\n\t\t_gl.pixelStorei( 37441, texture.premultiplyAlpha );\n\t\t_gl.pixelStorei( 3317, texture.unpackAlignment );\n\n\t\tvar needsPowerOfTwo = textureNeedsPowerOfTwo( texture ) && isPowerOfTwo( texture.image ) === false;\n\t\tvar image = resizeImage( texture.image, needsPowerOfTwo, false, maxTextureSize );\n\n\t\tvar supportsMips = isPowerOfTwo( image ) || isWebGL2,\n\t\t\tglFormat = utils.convert( texture.format ),\n\t\t\tglType = utils.convert( texture.type ),\n\t\t\tglInternalFormat = getInternalFormat( texture.internalFormat, glFormat, glType );\n\n\t\tsetTextureParameters( textureType, texture, supportsMips );\n\n\t\tvar mipmap, mipmaps = texture.mipmaps;\n\n\t\tif ( texture.isDepthTexture ) {\n\n\t\t\t// populate depth texture with dummy data\n\n\t\t\tglInternalFormat = 6402;\n\n\t\t\tif ( texture.type === FloatType ) {\n\n\t\t\t\tif ( isWebGL2 === false ) throw new Error( 'Float Depth Texture only supported in WebGL2.0' );\n\t\t\t\tglInternalFormat = 36012;\n\n\t\t\t} else if ( isWebGL2 ) {\n\n\t\t\t\t// WebGL 2.0 requires signed internalformat for glTexImage2D\n\t\t\t\tglInternalFormat = 33189;\n\n\t\t\t}\n\n\t\t\tif ( texture.format === DepthFormat && glInternalFormat === 6402 ) {\n\n\t\t\t\t// The error INVALID_OPERATION is generated by texImage2D if format and internalformat are\n\t\t\t\t// DEPTH_COMPONENT and type is not UNSIGNED_SHORT or UNSIGNED_INT\n\t\t\t\t// (https://www.khronos.org/registry/webgl/extensions/WEBGL_depth_texture/)\n\t\t\t\tif ( texture.type !== UnsignedShortType && texture.type !== UnsignedIntType ) {\n\n\t\t\t\t\tconsole.warn( 'THREE.WebGLRenderer: Use UnsignedShortType or UnsignedIntType for DepthFormat DepthTexture.' );\n\n\t\t\t\t\ttexture.type = UnsignedShortType;\n\t\t\t\t\tglType = utils.convert( texture.type );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\t// Depth stencil textures need the DEPTH_STENCIL internal format\n\t\t\t// (https://www.khronos.org/registry/webgl/extensions/WEBGL_depth_texture/)\n\t\t\tif ( texture.format === DepthStencilFormat ) {\n\n\t\t\t\tglInternalFormat = 34041;\n\n\t\t\t\t// The error INVALID_OPERATION is generated by texImage2D if format and internalformat are\n\t\t\t\t// DEPTH_STENCIL and type is not UNSIGNED_INT_24_8_WEBGL.\n\t\t\t\t// (https://www.khronos.org/registry/webgl/extensions/WEBGL_depth_texture/)\n\t\t\t\tif ( texture.type !== UnsignedInt248Type ) {\n\n\t\t\t\t\tconsole.warn( 'THREE.WebGLRenderer: Use UnsignedInt248Type for DepthStencilFormat DepthTexture.' );\n\n\t\t\t\t\ttexture.type = UnsignedInt248Type;\n\t\t\t\t\tglType = utils.convert( texture.type );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tstate.texImage2D( 3553, 0, glInternalFormat, image.width, image.height, 0, glFormat, glType, null );\n\n\t\t} else if ( texture.isDataTexture ) {\n\n\t\t\t// use manually created mipmaps if available\n\t\t\t// if there are no manual mipmaps\n\t\t\t// set 0 level mipmap and then use GL to generate other mipmap levels\n\n\t\t\tif ( mipmaps.length > 0 && supportsMips ) {\n\n\t\t\t\tfor ( var i = 0, il = mipmaps.length; i < il; i ++ ) {\n\n\t\t\t\t\tmipmap = mipmaps[ i ];\n\t\t\t\t\tstate.texImage2D( 3553, i, glInternalFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data );\n\n\t\t\t\t}\n\n\t\t\t\ttexture.generateMipmaps = false;\n\t\t\t\ttextureProperties.__maxMipLevel = mipmaps.length - 1;\n\n\t\t\t} else {\n\n\t\t\t\tstate.texImage2D( 3553, 0, glInternalFormat, image.width, image.height, 0, glFormat, glType, image.data );\n\t\t\t\ttextureProperties.__maxMipLevel = 0;\n\n\t\t\t}\n\n\t\t} else if ( texture.isCompressedTexture ) {\n\n\t\t\tfor ( var i = 0, il = mipmaps.length; i < il; i ++ ) {\n\n\t\t\t\tmipmap = mipmaps[ i ];\n\n\t\t\t\tif ( texture.format !== RGBAFormat && texture.format !== RGBFormat ) {\n\n\t\t\t\t\tif ( glFormat !== null ) {\n\n\t\t\t\t\t\tstate.compressedTexImage2D( 3553, i, glInternalFormat, mipmap.width, mipmap.height, 0, mipmap.data );\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\tconsole.warn( 'THREE.WebGLRenderer: Attempt to load unsupported compressed texture format in .uploadTexture()' );\n\n\t\t\t\t\t}\n\n\t\t\t\t} else {\n\n\t\t\t\t\tstate.texImage2D( 3553, i, glInternalFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\ttextureProperties.__maxMipLevel = mipmaps.length - 1;\n\n\t\t} else if ( texture.isDataTexture2DArray ) {\n\n\t\t\tstate.texImage3D( 35866, 0, glInternalFormat, image.width, image.height, image.depth, 0, glFormat, glType, image.data );\n\t\t\ttextureProperties.__maxMipLevel = 0;\n\n\t\t} else if ( texture.isDataTexture3D ) {\n\n\t\t\tstate.texImage3D( 32879, 0, glInternalFormat, image.width, image.height, image.depth, 0, glFormat, glType, image.data );\n\t\t\ttextureProperties.__maxMipLevel = 0;\n\n\t\t} else {\n\n\t\t\t// regular Texture (image, video, canvas)\n\n\t\t\t// use manually created mipmaps if available\n\t\t\t// if there are no manual mipmaps\n\t\t\t// set 0 level mipmap and then use GL to generate other mipmap levels\n\n\t\t\tif ( mipmaps.length > 0 && supportsMips ) {\n\n\t\t\t\tfor ( var i = 0, il = mipmaps.length; i < il; i ++ ) {\n\n\t\t\t\t\tmipmap = mipmaps[ i ];\n\t\t\t\t\tstate.texImage2D( 3553, i, glInternalFormat, glFormat, glType, mipmap );\n\n\t\t\t\t}\n\n\t\t\t\ttexture.generateMipmaps = false;\n\t\t\t\ttextureProperties.__maxMipLevel = mipmaps.length - 1;\n\n\t\t\t} else {\n\n\t\t\t\tstate.texImage2D( 3553, 0, glInternalFormat, glFormat, glType, image );\n\t\t\t\ttextureProperties.__maxMipLevel = 0;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( textureNeedsGenerateMipmaps( texture, supportsMips ) ) {\n\n\t\t\tgenerateMipmap( textureType, texture, image.width, image.height );\n\n\t\t}\n\n\t\ttextureProperties.__version = texture.version;\n\n\t\tif ( texture.onUpdate ) texture.onUpdate( texture );\n\n\t}\n\n\t// Render targets\n\n\t// Setup storage for target texture and bind it to correct framebuffer\n\tfunction setupFrameBufferTexture( framebuffer, renderTarget, attachment, textureTarget ) {\n\n\t\tvar glFormat = utils.convert( renderTarget.texture.format );\n\t\tvar glType = utils.convert( renderTarget.texture.type );\n\t\tvar glInternalFormat = getInternalFormat( renderTarget.texture.internalFormat, glFormat, glType );\n\t\tstate.texImage2D( textureTarget, 0, glInternalFormat, renderTarget.width, renderTarget.height, 0, glFormat, glType, null );\n\t\t_gl.bindFramebuffer( 36160, framebuffer );\n\t\t_gl.framebufferTexture2D( 36160, attachment, textureTarget, properties.get( renderTarget.texture ).__webglTexture, 0 );\n\t\t_gl.bindFramebuffer( 36160, null );\n\n\t}\n\n\t// Setup storage for internal depth/stencil buffers and bind to correct framebuffer\n\tfunction setupRenderBufferStorage( renderbuffer, renderTarget, isMultisample ) {\n\n\t\t_gl.bindRenderbuffer( 36161, renderbuffer );\n\n\t\tif ( renderTarget.depthBuffer && ! renderTarget.stencilBuffer ) {\n\n\t\t\tif ( isMultisample ) {\n\n\t\t\t\tvar samples = getRenderTargetSamples( renderTarget );\n\n\t\t\t\t_gl.renderbufferStorageMultisample( 36161, samples, 33189, renderTarget.width, renderTarget.height );\n\n\t\t\t} else {\n\n\t\t\t\t_gl.renderbufferStorage( 36161, 33189, renderTarget.width, renderTarget.height );\n\n\t\t\t}\n\n\t\t\t_gl.framebufferRenderbuffer( 36160, 36096, 36161, renderbuffer );\n\n\t\t} else if ( renderTarget.depthBuffer && renderTarget.stencilBuffer ) {\n\n\t\t\tif ( isMultisample ) {\n\n\t\t\t\tvar samples = getRenderTargetSamples( renderTarget );\n\n\t\t\t\t_gl.renderbufferStorageMultisample( 36161, samples, 35056, renderTarget.width, renderTarget.height );\n\n\t\t\t} else {\n\n\t\t\t\t_gl.renderbufferStorage( 36161, 34041, renderTarget.width, renderTarget.height );\n\n\t\t\t}\n\n\n\t\t\t_gl.framebufferRenderbuffer( 36160, 33306, 36161, renderbuffer );\n\n\t\t} else {\n\n\t\t\tvar glFormat = utils.convert( renderTarget.texture.format );\n\t\t\tvar glType = utils.convert( renderTarget.texture.type );\n\t\t\tvar glInternalFormat = getInternalFormat( renderTarget.texture.internalFormat, glFormat, glType );\n\n\t\t\tif ( isMultisample ) {\n\n\t\t\t\tvar samples = getRenderTargetSamples( renderTarget );\n\n\t\t\t\t_gl.renderbufferStorageMultisample( 36161, samples, glInternalFormat, renderTarget.width, renderTarget.height );\n\n\t\t\t} else {\n\n\t\t\t\t_gl.renderbufferStorage( 36161, glInternalFormat, renderTarget.width, renderTarget.height );\n\n\t\t\t}\n\n\t\t}\n\n\t\t_gl.bindRenderbuffer( 36161, null );\n\n\t}\n\n\t// Setup resources for a Depth Texture for a FBO (needs an extension)\n\tfunction setupDepthTexture( framebuffer, renderTarget ) {\n\n\t\tvar isCube = ( renderTarget && renderTarget.isWebGLCubeRenderTarget );\n\t\tif ( isCube ) throw new Error( 'Depth Texture with cube render targets is not supported' );\n\n\t\t_gl.bindFramebuffer( 36160, framebuffer );\n\n\t\tif ( ! ( renderTarget.depthTexture && renderTarget.depthTexture.isDepthTexture ) ) {\n\n\t\t\tthrow new Error( 'renderTarget.depthTexture must be an instance of THREE.DepthTexture' );\n\n\t\t}\n\n\t\t// upload an empty depth texture with framebuffer size\n\t\tif ( ! properties.get( renderTarget.depthTexture ).__webglTexture ||\n\t\t\t\trenderTarget.depthTexture.image.width !== renderTarget.width ||\n\t\t\t\trenderTarget.depthTexture.image.height !== renderTarget.height ) {\n\n\t\t\trenderTarget.depthTexture.image.width = renderTarget.width;\n\t\t\trenderTarget.depthTexture.image.height = renderTarget.height;\n\t\t\trenderTarget.depthTexture.needsUpdate = true;\n\n\t\t}\n\n\t\tsetTexture2D( renderTarget.depthTexture, 0 );\n\n\t\tvar webglDepthTexture = properties.get( renderTarget.depthTexture ).__webglTexture;\n\n\t\tif ( renderTarget.depthTexture.format === DepthFormat ) {\n\n\t\t\t_gl.framebufferTexture2D( 36160, 36096, 3553, webglDepthTexture, 0 );\n\n\t\t} else if ( renderTarget.depthTexture.format === DepthStencilFormat ) {\n\n\t\t\t_gl.framebufferTexture2D( 36160, 33306, 3553, webglDepthTexture, 0 );\n\n\t\t} else {\n\n\t\t\tthrow new Error( 'Unknown depthTexture format' );\n\n\t\t}\n\n\t}\n\n\t// Setup GL resources for a non-texture depth buffer\n\tfunction setupDepthRenderbuffer( renderTarget ) {\n\n\t\tvar renderTargetProperties = properties.get( renderTarget );\n\n\t\tvar isCube = ( renderTarget.isWebGLCubeRenderTarget === true );\n\n\t\tif ( renderTarget.depthTexture ) {\n\n\t\t\tif ( isCube ) throw new Error( 'target.depthTexture not supported in Cube render targets' );\n\n\t\t\tsetupDepthTexture( renderTargetProperties.__webglFramebuffer, renderTarget );\n\n\t\t} else {\n\n\t\t\tif ( isCube ) {\n\n\t\t\t\trenderTargetProperties.__webglDepthbuffer = [];\n\n\t\t\t\tfor ( var i = 0; i < 6; i ++ ) {\n\n\t\t\t\t\t_gl.bindFramebuffer( 36160, renderTargetProperties.__webglFramebuffer[ i ] );\n\t\t\t\t\trenderTargetProperties.__webglDepthbuffer[ i ] = _gl.createRenderbuffer();\n\t\t\t\t\tsetupRenderBufferStorage( renderTargetProperties.__webglDepthbuffer[ i ], renderTarget );\n\n\t\t\t\t}\n\n\t\t\t} else {\n\n\t\t\t\t_gl.bindFramebuffer( 36160, renderTargetProperties.__webglFramebuffer );\n\t\t\t\trenderTargetProperties.__webglDepthbuffer = _gl.createRenderbuffer();\n\t\t\t\tsetupRenderBufferStorage( renderTargetProperties.__webglDepthbuffer, renderTarget );\n\n\t\t\t}\n\n\t\t}\n\n\t\t_gl.bindFramebuffer( 36160, null );\n\n\t}\n\n\t// Set up GL resources for the render target\n\tfunction setupRenderTarget( renderTarget ) {\n\n\t\tvar renderTargetProperties = properties.get( renderTarget );\n\t\tvar textureProperties = properties.get( renderTarget.texture );\n\n\t\trenderTarget.addEventListener( 'dispose', onRenderTargetDispose );\n\n\t\ttextureProperties.__webglTexture = _gl.createTexture();\n\n\t\tinfo.memory.textures ++;\n\n\t\tvar isCube = ( renderTarget.isWebGLCubeRenderTarget === true );\n\t\tvar isMultisample = ( renderTarget.isWebGLMultisampleRenderTarget === true );\n\t\tvar supportsMips = isPowerOfTwo( renderTarget ) || isWebGL2;\n\n\t\t// Setup framebuffer\n\n\t\tif ( isCube ) {\n\n\t\t\trenderTargetProperties.__webglFramebuffer = [];\n\n\t\t\tfor ( var i = 0; i < 6; i ++ ) {\n\n\t\t\t\trenderTargetProperties.__webglFramebuffer[ i ] = _gl.createFramebuffer();\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\trenderTargetProperties.__webglFramebuffer = _gl.createFramebuffer();\n\n\t\t\tif ( isMultisample ) {\n\n\t\t\t\tif ( isWebGL2 ) {\n\n\t\t\t\t\trenderTargetProperties.__webglMultisampledFramebuffer = _gl.createFramebuffer();\n\t\t\t\t\trenderTargetProperties.__webglColorRenderbuffer = _gl.createRenderbuffer();\n\n\t\t\t\t\t_gl.bindRenderbuffer( 36161, renderTargetProperties.__webglColorRenderbuffer );\n\n\t\t\t\t\tvar glFormat = utils.convert( renderTarget.texture.format );\n\t\t\t\t\tvar glType = utils.convert( renderTarget.texture.type );\n\t\t\t\t\tvar glInternalFormat = getInternalFormat( renderTarget.texture.internalFormat, glFormat, glType );\n\t\t\t\t\tvar samples = getRenderTargetSamples( renderTarget );\n\t\t\t\t\t_gl.renderbufferStorageMultisample( 36161, samples, glInternalFormat, renderTarget.width, renderTarget.height );\n\n\t\t\t\t\t_gl.bindFramebuffer( 36160, renderTargetProperties.__webglMultisampledFramebuffer );\n\t\t\t\t\t_gl.framebufferRenderbuffer( 36160, 36064, 36161, renderTargetProperties.__webglColorRenderbuffer );\n\t\t\t\t\t_gl.bindRenderbuffer( 36161, null );\n\n\t\t\t\t\tif ( renderTarget.depthBuffer ) {\n\n\t\t\t\t\t\trenderTargetProperties.__webglDepthRenderbuffer = _gl.createRenderbuffer();\n\t\t\t\t\t\tsetupRenderBufferStorage( renderTargetProperties.__webglDepthRenderbuffer, renderTarget, true );\n\n\t\t\t\t\t}\n\n\t\t\t\t\t_gl.bindFramebuffer( 36160, null );\n\n\n\t\t\t\t} else {\n\n\t\t\t\t\tconsole.warn( 'THREE.WebGLRenderer: WebGLMultisampleRenderTarget can only be used with WebGL2.' );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\t// Setup color buffer\n\n\t\tif ( isCube ) {\n\n\t\t\tstate.bindTexture( 34067, textureProperties.__webglTexture );\n\t\t\tsetTextureParameters( 34067, renderTarget.texture, supportsMips );\n\n\t\t\tfor ( var i = 0; i < 6; i ++ ) {\n\n\t\t\t\tsetupFrameBufferTexture( renderTargetProperties.__webglFramebuffer[ i ], renderTarget, 36064, 34069 + i );\n\n\t\t\t}\n\n\t\t\tif ( textureNeedsGenerateMipmaps( renderTarget.texture, supportsMips ) ) {\n\n\t\t\t\tgenerateMipmap( 34067, renderTarget.texture, renderTarget.width, renderTarget.height );\n\n\t\t\t}\n\n\t\t\tstate.bindTexture( 34067, null );\n\n\t\t} else {\n\n\t\t\tstate.bindTexture( 3553, textureProperties.__webglTexture );\n\t\t\tsetTextureParameters( 3553, renderTarget.texture, supportsMips );\n\t\t\tsetupFrameBufferTexture( renderTargetProperties.__webglFramebuffer, renderTarget, 36064, 3553 );\n\n\t\t\tif ( textureNeedsGenerateMipmaps( renderTarget.texture, supportsMips ) ) {\n\n\t\t\t\tgenerateMipmap( 3553, renderTarget.texture, renderTarget.width, renderTarget.height );\n\n\t\t\t}\n\n\t\t\tstate.bindTexture( 3553, null );\n\n\t\t}\n\n\t\t// Setup depth and stencil buffers\n\n\t\tif ( renderTarget.depthBuffer ) {\n\n\t\t\tsetupDepthRenderbuffer( renderTarget );\n\n\t\t}\n\n\t}\n\n\tfunction updateRenderTargetMipmap( renderTarget ) {\n\n\t\tvar texture = renderTarget.texture;\n\t\tvar supportsMips = isPowerOfTwo( renderTarget ) || isWebGL2;\n\n\t\tif ( textureNeedsGenerateMipmaps( texture, supportsMips ) ) {\n\n\t\t\tvar target = renderTarget.isWebGLCubeRenderTarget ? 34067 : 3553;\n\t\t\tvar webglTexture = properties.get( texture ).__webglTexture;\n\n\t\t\tstate.bindTexture( target, webglTexture );\n\t\t\tgenerateMipmap( target, texture, renderTarget.width, renderTarget.height );\n\t\t\tstate.bindTexture( target, null );\n\n\t\t}\n\n\t}\n\n\tfunction updateMultisampleRenderTarget( renderTarget ) {\n\n\t\tif ( renderTarget.isWebGLMultisampleRenderTarget ) {\n\n\t\t\tif ( isWebGL2 ) {\n\n\t\t\t\tvar renderTargetProperties = properties.get( renderTarget );\n\n\t\t\t\t_gl.bindFramebuffer( 36008, renderTargetProperties.__webglMultisampledFramebuffer );\n\t\t\t\t_gl.bindFramebuffer( 36009, renderTargetProperties.__webglFramebuffer );\n\n\t\t\t\tvar width = renderTarget.width;\n\t\t\t\tvar height = renderTarget.height;\n\t\t\t\tvar mask = 16384;\n\n\t\t\t\tif ( renderTarget.depthBuffer ) mask |= 256;\n\t\t\t\tif ( renderTarget.stencilBuffer ) mask |= 1024;\n\n\t\t\t\t_gl.blitFramebuffer( 0, 0, width, height, 0, 0, width, height, mask, 9728 );\n\n\t\t\t} else {\n\n\t\t\t\tconsole.warn( 'THREE.WebGLRenderer: WebGLMultisampleRenderTarget can only be used with WebGL2.' );\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\tfunction getRenderTargetSamples( renderTarget ) {\n\n\t\treturn ( isWebGL2 && renderTarget.isWebGLMultisampleRenderTarget ) ?\n\t\t\tMath.min( maxSamples, renderTarget.samples ) : 0;\n\n\t}\n\n\tfunction updateVideoTexture( texture ) {\n\n\t\tvar frame = info.render.frame;\n\n\t\t// Check the last frame we updated the VideoTexture\n\n\t\tif ( _videoTextures.get( texture ) !== frame ) {\n\n\t\t\t_videoTextures.set( texture, frame );\n\t\t\ttexture.update();\n\n\t\t}\n\n\t}\n\n\t// backwards compatibility\n\n\tvar warnedTexture2D = false;\n\tvar warnedTextureCube = false;\n\n\tfunction safeSetTexture2D( texture, slot ) {\n\n\t\tif ( texture && texture.isWebGLRenderTarget ) {\n\n\t\t\tif ( warnedTexture2D === false ) {\n\n\t\t\t\tconsole.warn( \"THREE.WebGLTextures.safeSetTexture2D: don't use render targets as textures. Use their .texture property instead.\" );\n\t\t\t\twarnedTexture2D = true;\n\n\t\t\t}\n\n\t\t\ttexture = texture.texture;\n\n\t\t}\n\n\t\tsetTexture2D( texture, slot );\n\n\t}\n\n\tfunction safeSetTextureCube( texture, slot ) {\n\n\t\tif ( texture && texture.isWebGLCubeRenderTarget ) {\n\n\t\t\tif ( warnedTextureCube === false ) {\n\n\t\t\t\tconsole.warn( \"THREE.WebGLTextures.safeSetTextureCube: don't use cube render targets as textures. Use their .texture property instead.\" );\n\t\t\t\twarnedTextureCube = true;\n\n\t\t\t}\n\n\t\t\ttexture = texture.texture;\n\n\t\t}\n\n\t\t// currently relying on the fact that WebGLCubeRenderTarget.texture is a Texture and NOT a CubeTexture\n\t\t// TODO: unify these code paths\n\t\tif ( ( texture && texture.isCubeTexture ) ||\n\t\t\t( Array.isArray( texture.image ) && texture.image.length === 6 ) ) {\n\n\t\t\t// CompressedTexture can have Array in image :/\n\n\t\t\t// this function alone should take care of cube textures\n\t\t\tsetTextureCube( texture, slot );\n\n\t\t} else {\n\n\t\t\t// assumed: texture property of THREE.WebGLCubeRenderTarget\n\t\t\tsetTextureCubeDynamic( texture, slot );\n\n\t\t}\n\n\t}\n\n\t//\n\n\tthis.allocateTextureUnit = allocateTextureUnit;\n\tthis.resetTextureUnits = resetTextureUnits;\n\n\tthis.setTexture2D = setTexture2D;\n\tthis.setTexture2DArray = setTexture2DArray;\n\tthis.setTexture3D = setTexture3D;\n\tthis.setTextureCube = setTextureCube;\n\tthis.setTextureCubeDynamic = setTextureCubeDynamic;\n\tthis.setupRenderTarget = setupRenderTarget;\n\tthis.updateRenderTargetMipmap = updateRenderTargetMipmap;\n\tthis.updateMultisampleRenderTarget = updateMultisampleRenderTarget;\n\n\tthis.safeSetTexture2D = safeSetTexture2D;\n\tthis.safeSetTextureCube = safeSetTextureCube;\n\n}\n\n/**\n * @author thespite / http://www.twitter.com/thespite\n */\n\nfunction WebGLUtils( gl, extensions, capabilities ) {\n\n\tvar isWebGL2 = capabilities.isWebGL2;\n\n\tfunction convert( p ) {\n\n\t\tvar extension;\n\n\t\tif ( p === UnsignedByteType ) return 5121;\n\t\tif ( p === UnsignedShort4444Type ) return 32819;\n\t\tif ( p === UnsignedShort5551Type ) return 32820;\n\t\tif ( p === UnsignedShort565Type ) return 33635;\n\n\t\tif ( p === ByteType ) return 5120;\n\t\tif ( p === ShortType ) return 5122;\n\t\tif ( p === UnsignedShortType ) return 5123;\n\t\tif ( p === IntType ) return 5124;\n\t\tif ( p === UnsignedIntType ) return 5125;\n\t\tif ( p === FloatType ) return 5126;\n\n\t\tif ( p === HalfFloatType ) {\n\n\t\t\tif ( isWebGL2 ) return 5131;\n\n\t\t\textension = extensions.get( 'OES_texture_half_float' );\n\n\t\t\tif ( extension !== null ) {\n\n\t\t\t\treturn extension.HALF_FLOAT_OES;\n\n\t\t\t} else {\n\n\t\t\t\treturn null;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( p === AlphaFormat ) return 6406;\n\t\tif ( p === RGBFormat ) return 6407;\n\t\tif ( p === RGBAFormat ) return 6408;\n\t\tif ( p === LuminanceFormat ) return 6409;\n\t\tif ( p === LuminanceAlphaFormat ) return 6410;\n\t\tif ( p === DepthFormat ) return 6402;\n\t\tif ( p === DepthStencilFormat ) return 34041;\n\t\tif ( p === RedFormat ) return 6403;\n\n\t\t// WebGL2 formats.\n\n\t\tif ( p === RedIntegerFormat ) return 36244;\n\t\tif ( p === RGFormat ) return 33319;\n\t\tif ( p === RGIntegerFormat ) return 33320;\n\t\tif ( p === RGBIntegerFormat ) return 36248;\n\t\tif ( p === RGBAIntegerFormat ) return 36249;\n\n\t\tif ( p === RGB_S3TC_DXT1_Format || p === RGBA_S3TC_DXT1_Format ||\n\t\t\tp === RGBA_S3TC_DXT3_Format || p === RGBA_S3TC_DXT5_Format ) {\n\n\t\t\textension = extensions.get( 'WEBGL_compressed_texture_s3tc' );\n\n\t\t\tif ( extension !== null ) {\n\n\t\t\t\tif ( p === RGB_S3TC_DXT1_Format ) return extension.COMPRESSED_RGB_S3TC_DXT1_EXT;\n\t\t\t\tif ( p === RGBA_S3TC_DXT1_Format ) return extension.COMPRESSED_RGBA_S3TC_DXT1_EXT;\n\t\t\t\tif ( p === RGBA_S3TC_DXT3_Format ) return extension.COMPRESSED_RGBA_S3TC_DXT3_EXT;\n\t\t\t\tif ( p === RGBA_S3TC_DXT5_Format ) return extension.COMPRESSED_RGBA_S3TC_DXT5_EXT;\n\n\t\t\t} else {\n\n\t\t\t\treturn null;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( p === RGB_PVRTC_4BPPV1_Format || p === RGB_PVRTC_2BPPV1_Format ||\n\t\t\tp === RGBA_PVRTC_4BPPV1_Format || p === RGBA_PVRTC_2BPPV1_Format ) {\n\n\t\t\textension = extensions.get( 'WEBGL_compressed_texture_pvrtc' );\n\n\t\t\tif ( extension !== null ) {\n\n\t\t\t\tif ( p === RGB_PVRTC_4BPPV1_Format ) return extension.COMPRESSED_RGB_PVRTC_4BPPV1_IMG;\n\t\t\t\tif ( p === RGB_PVRTC_2BPPV1_Format ) return extension.COMPRESSED_RGB_PVRTC_2BPPV1_IMG;\n\t\t\t\tif ( p === RGBA_PVRTC_4BPPV1_Format ) return extension.COMPRESSED_RGBA_PVRTC_4BPPV1_IMG;\n\t\t\t\tif ( p === RGBA_PVRTC_2BPPV1_Format ) return extension.COMPRESSED_RGBA_PVRTC_2BPPV1_IMG;\n\n\t\t\t} else {\n\n\t\t\t\treturn null;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( p === RGB_ETC1_Format ) {\n\n\t\t\textension = extensions.get( 'WEBGL_compressed_texture_etc1' );\n\n\t\t\tif ( extension !== null ) {\n\n\t\t\t\treturn extension.COMPRESSED_RGB_ETC1_WEBGL;\n\n\t\t\t} else {\n\n\t\t\t\treturn null;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( p === RGB_ETC2_Format || p === RGBA_ETC2_EAC_Format ) {\n\n\t\t\textension = extensions.get( 'WEBGL_compressed_texture_etc' );\n\n\t\t\tif ( extension !== null ) {\n\n\t\t\t\tif ( p === RGB_ETC2_Format ) return extension.COMPRESSED_RGB8_ETC2;\n\t\t\t\tif ( p === RGBA_ETC2_EAC_Format ) return extension.COMPRESSED_RGBA8_ETC2_EAC;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( p === RGBA_ASTC_4x4_Format || p === RGBA_ASTC_5x4_Format || p === RGBA_ASTC_5x5_Format ||\n\t\t\tp === RGBA_ASTC_6x5_Format || p === RGBA_ASTC_6x6_Format || p === RGBA_ASTC_8x5_Format ||\n\t\t\tp === RGBA_ASTC_8x6_Format || p === RGBA_ASTC_8x8_Format || p === RGBA_ASTC_10x5_Format ||\n\t\t\tp === RGBA_ASTC_10x6_Format || p === RGBA_ASTC_10x8_Format || p === RGBA_ASTC_10x10_Format ||\n\t\t\tp === RGBA_ASTC_12x10_Format || p === RGBA_ASTC_12x12_Format ||\n\t\t\tp === SRGB8_ALPHA8_ASTC_4x4_Format || p === SRGB8_ALPHA8_ASTC_5x4_Format || p === SRGB8_ALPHA8_ASTC_5x5_Format ||\n\t\t\tp === SRGB8_ALPHA8_ASTC_6x5_Format || p === SRGB8_ALPHA8_ASTC_6x6_Format || p === SRGB8_ALPHA8_ASTC_8x5_Format ||\n\t\t\tp === SRGB8_ALPHA8_ASTC_8x6_Format || p === SRGB8_ALPHA8_ASTC_8x8_Format || p === SRGB8_ALPHA8_ASTC_10x5_Format ||\n\t\t\tp === SRGB8_ALPHA8_ASTC_10x6_Format || p === SRGB8_ALPHA8_ASTC_10x8_Format || p === SRGB8_ALPHA8_ASTC_10x10_Format ||\n\t\t\tp === SRGB8_ALPHA8_ASTC_12x10_Format || p === SRGB8_ALPHA8_ASTC_12x12_Format ) {\n\n\t\t\textension = extensions.get( 'WEBGL_compressed_texture_astc' );\n\n\t\t\tif ( extension !== null ) {\n\n\t\t\t\t// TODO Complete?\n\n\t\t\t\treturn p;\n\n\t\t\t} else {\n\n\t\t\t\treturn null;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( p === UnsignedInt248Type ) {\n\n\t\t\tif ( isWebGL2 ) return 34042;\n\n\t\t\textension = extensions.get( 'WEBGL_depth_texture' );\n\n\t\t\tif ( extension !== null ) {\n\n\t\t\t\treturn extension.UNSIGNED_INT_24_8_WEBGL;\n\n\t\t\t} else {\n\n\t\t\t\treturn null;\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\treturn { convert: convert };\n\n}\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction ArrayCamera( array ) {\n\n\tPerspectiveCamera.call( this );\n\n\tthis.cameras = array || [];\n\n}\n\nArrayCamera.prototype = Object.assign( Object.create( PerspectiveCamera.prototype ), {\n\n\tconstructor: ArrayCamera,\n\n\tisArrayCamera: true\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction Group() {\n\n\tObject3D.call( this );\n\n\tthis.type = 'Group';\n\n}\n\nGroup.prototype = Object.assign( Object.create( Object3D.prototype ), {\n\n\tconstructor: Group,\n\n\tisGroup: true\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction WebXRManager( renderer, gl ) {\n\n\tvar scope = this;\n\n\tvar session = null;\n\n\tvar framebufferScaleFactor = 1.0;\n\n\tvar referenceSpace = null;\n\tvar referenceSpaceType = 'local-floor';\n\n\tvar pose = null;\n\n\tvar controllers = [];\n\tvar inputSourcesMap = new Map();\n\n\t//\n\n\tvar cameraL = new PerspectiveCamera();\n\tcameraL.layers.enable( 1 );\n\tcameraL.viewport = new Vector4();\n\n\tvar cameraR = new PerspectiveCamera();\n\tcameraR.layers.enable( 2 );\n\tcameraR.viewport = new Vector4();\n\n\tvar cameraVR = new ArrayCamera( [ cameraL, cameraR ] );\n\tcameraVR.layers.enable( 1 );\n\tcameraVR.layers.enable( 2 );\n\n\tvar _currentDepthNear = null;\n\tvar _currentDepthFar = null;\n\n\t//\n\n\tthis.enabled = false;\n\n\tthis.isPresenting = false;\n\n\tthis.getController = function ( id ) {\n\n\t\tvar controller = controllers[ id ];\n\n\t\tif ( controller === undefined ) {\n\n\t\t\tcontroller = {};\n\t\t\tcontrollers[ id ] = controller;\n\n\t\t}\n\n\t\tif ( controller.targetRay === undefined ) {\n\n\t\t\tcontroller.targetRay = new Group();\n\t\t\tcontroller.targetRay.matrixAutoUpdate = false;\n\t\t\tcontroller.targetRay.visible = false;\n\n\t\t}\n\n\t\treturn controller.targetRay;\n\n\t};\n\n\tthis.getControllerGrip = function ( id ) {\n\n\t\tvar controller = controllers[ id ];\n\n\t\tif ( controller === undefined ) {\n\n\t\t\tcontroller = {};\n\t\t\tcontrollers[ id ] = controller;\n\n\t\t}\n\n\t\tif ( controller.grip === undefined ) {\n\n\t\t\tcontroller.grip = new Group();\n\t\t\tcontroller.grip.matrixAutoUpdate = false;\n\t\t\tcontroller.grip.visible = false;\n\n\t\t}\n\n\t\treturn controller.grip;\n\n\t};\n\n\t//\n\n\tfunction onSessionEvent( event ) {\n\n\t\tvar controller = inputSourcesMap.get( event.inputSource );\n\n\t\tif ( controller ) {\n\n\t\t\tif ( controller.targetRay ) {\n\n\t\t\t\tcontroller.targetRay.dispatchEvent( { type: event.type } );\n\n\t\t\t}\n\n\t\t\tif ( controller.grip ) {\n\n\t\t\t\tcontroller.grip.dispatchEvent( { type: event.type } );\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\tfunction onSessionEnd() {\n\n\t\tinputSourcesMap.forEach( function ( controller, inputSource ) {\n\n\t\t\tif ( controller.targetRay ) {\n\n\t\t\t\tcontroller.targetRay.dispatchEvent( { type: 'disconnected', data: inputSource } );\n\t\t\t\tcontroller.targetRay.visible = false;\n\n\t\t\t}\n\n\t\t\tif ( controller.grip ) {\n\n\t\t\t\tcontroller.grip.dispatchEvent( { type: 'disconnected', data: inputSource } );\n\t\t\t\tcontroller.grip.visible = false;\n\n\t\t\t}\n\n\t\t} );\n\n\t\tinputSourcesMap.clear();\n\n\t\t//\n\n\t\trenderer.setFramebuffer( null );\n\t\trenderer.setRenderTarget( renderer.getRenderTarget() ); // Hack #15830\n\t\tanimation.stop();\n\n\t\tscope.isPresenting = false;\n\n\t\tscope.dispatchEvent( { type: 'sessionend' } );\n\n\t}\n\n\tfunction onRequestReferenceSpace( value ) {\n\n\t\treferenceSpace = value;\n\n\t\tanimation.setContext( session );\n\t\tanimation.start();\n\n\t\tscope.isPresenting = true;\n\n\t\tscope.dispatchEvent( { type: 'sessionstart' } );\n\n\t}\n\n\tthis.setFramebufferScaleFactor = function ( value ) {\n\n\t\tframebufferScaleFactor = value;\n\n\t\t// Warn if function is used while presenting\n\t\tif ( scope.isPresenting == true ) {\n\n\t\t\tconsole.warn( \"WebXRManager: Cannot change framebuffer scale while presenting VR content\" );\n\n\t\t}\n\n\t};\n\n\tthis.setReferenceSpaceType = function ( value ) {\n\n\t\treferenceSpaceType = value;\n\n\t};\n\n\tthis.getReferenceSpace = function () {\n\n\t\treturn referenceSpace;\n\n\t};\n\n\tthis.getSession = function () {\n\n\t\treturn session;\n\n\t};\n\n\tthis.setSession = function ( value ) {\n\n\t\tsession = value;\n\n\t\tif ( session !== null ) {\n\n\t\t\tsession.addEventListener( 'select', onSessionEvent );\n\t\t\tsession.addEventListener( 'selectstart', onSessionEvent );\n\t\t\tsession.addEventListener( 'selectend', onSessionEvent );\n\t\t\tsession.addEventListener( 'squeeze', onSessionEvent );\n\t\t\tsession.addEventListener( 'squeezestart', onSessionEvent );\n\t\t\tsession.addEventListener( 'squeezeend', onSessionEvent );\n\t\t\tsession.addEventListener( 'end', onSessionEnd );\n\n\t\t\tvar attributes = gl.getContextAttributes();\n\n\t\t\tvar layerInit = {\n\t\t\t\tantialias: attributes.antialias,\n\t\t\t\talpha: attributes.alpha,\n\t\t\t\tdepth: attributes.depth,\n\t\t\t\tstencil: attributes.stencil,\n\t\t\t\tframebufferScaleFactor: framebufferScaleFactor\n\t\t\t};\n\n\t\t\t// eslint-disable-next-line no-undef\n\t\t\tvar baseLayer = new XRWebGLLayer( session, gl, layerInit );\n\n\t\t\tsession.updateRenderState( { baseLayer: baseLayer } );\n\n\t\t\tsession.requestReferenceSpace( referenceSpaceType ).then( onRequestReferenceSpace );\n\n\t\t\t//\n\n\t\t\tsession.addEventListener( 'inputsourceschange', updateInputSources );\n\n\t\t}\n\n\t};\n\n\tfunction updateInputSources( event ) {\n\n\t\tvar inputSources = session.inputSources;\n\n\t\t// Assign inputSources to available controllers\n\n\t\tfor ( var i = 0; i < controllers.length; i ++ ) {\n\n\t\t\tinputSourcesMap.set( inputSources[ i ], controllers[ i ] );\n\n\t\t}\n\n\t\t// Notify disconnected\n\n\t\tfor ( var i = 0; i < event.removed.length; i ++ ) {\n\n\t\t\tvar inputSource = event.removed[ i ];\n\t\t\tvar controller = inputSourcesMap.get( inputSource );\n\n\t\t\tif ( controller ) {\n\n\t\t\t\tif ( controller.targetRay ) {\n\n\t\t\t\t\tcontroller.targetRay.dispatchEvent( { type: 'disconnected', data: inputSource } );\n\n\t\t\t\t}\n\n\t\t\t\tif ( controller.grip ) {\n\n\t\t\t\t\tcontroller.grip.dispatchEvent( { type: 'disconnected', data: inputSource } );\n\n\t\t\t\t}\n\n\t\t\t\tinputSourcesMap.delete( inputSource );\n\n\t\t\t}\n\n\t\t}\n\n\t\t// Notify connected\n\n\t\tfor ( var i = 0; i < event.added.length; i ++ ) {\n\n\t\t\tvar inputSource = event.added[ i ];\n\t\t\tvar controller = inputSourcesMap.get( inputSource );\n\n\t\t\tif ( controller ) {\n\n\t\t\t\tif ( controller.targetRay ) {\n\n\t\t\t\t\tcontroller.targetRay.dispatchEvent( { type: 'connected', data: inputSource } );\n\n\t\t\t\t}\n\n\t\t\t\tif ( controller.grip ) {\n\n\t\t\t\t\tcontroller.grip.dispatchEvent( { type: 'connected', data: inputSource } );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\t//\n\n\tvar cameraLPos = new Vector3();\n\tvar cameraRPos = new Vector3();\n\n\t/**\n\t * @author jsantell / https://www.jsantell.com/\n\t *\n\t * Assumes 2 cameras that are parallel and share an X-axis, and that\n\t * the cameras' projection and world matrices have already been set.\n\t * And that near and far planes are identical for both cameras.\n\t * Visualization of this technique: https://computergraphics.stackexchange.com/a/4765\n\t */\n\tfunction setProjectionFromUnion( camera, cameraL, cameraR ) {\n\n\t\tcameraLPos.setFromMatrixPosition( cameraL.matrixWorld );\n\t\tcameraRPos.setFromMatrixPosition( cameraR.matrixWorld );\n\n\t\tvar ipd = cameraLPos.distanceTo( cameraRPos );\n\n\t\tvar projL = cameraL.projectionMatrix.elements;\n\t\tvar projR = cameraR.projectionMatrix.elements;\n\n\t\t// VR systems will have identical far and near planes, and\n\t\t// most likely identical top and bottom frustum extents.\n\t\t// Use the left camera for these values.\n\t\tvar near = projL[ 14 ] / ( projL[ 10 ] - 1 );\n\t\tvar far = projL[ 14 ] / ( projL[ 10 ] + 1 );\n\t\tvar topFov = ( projL[ 9 ] + 1 ) / projL[ 5 ];\n\t\tvar bottomFov = ( projL[ 9 ] - 1 ) / projL[ 5 ];\n\n\t\tvar leftFov = ( projL[ 8 ] - 1 ) / projL[ 0 ];\n\t\tvar rightFov = ( projR[ 8 ] + 1 ) / projR[ 0 ];\n\t\tvar left = near * leftFov;\n\t\tvar right = near * rightFov;\n\n\t\t// Calculate the new camera's position offset from the\n\t\t// left camera. xOffset should be roughly half `ipd`.\n\t\tvar zOffset = ipd / ( - leftFov + rightFov );\n\t\tvar xOffset = zOffset * - leftFov;\n\n\t\t// TODO: Better way to apply this offset?\n\t\tcameraL.matrixWorld.decompose( camera.position, camera.quaternion, camera.scale );\n\t\tcamera.translateX( xOffset );\n\t\tcamera.translateZ( zOffset );\n\t\tcamera.matrixWorld.compose( camera.position, camera.quaternion, camera.scale );\n\t\tcamera.matrixWorldInverse.getInverse( camera.matrixWorld );\n\n\t\t// Find the union of the frustum values of the cameras and scale\n\t\t// the values so that the near plane's position does not change in world space,\n\t\t// although must now be relative to the new union camera.\n\t\tvar near2 = near + zOffset;\n\t\tvar far2 = far + zOffset;\n\t\tvar left2 = left - xOffset;\n\t\tvar right2 = right + ( ipd - xOffset );\n\t\tvar top2 = topFov * far / far2 * near2;\n\t\tvar bottom2 = bottomFov * far / far2 * near2;\n\n\t\tcamera.projectionMatrix.makePerspective( left2, right2, top2, bottom2, near2, far2 );\n\n\t}\n\n\tfunction updateCamera( camera, parent ) {\n\n\t\tif ( parent === null ) {\n\n\t\t\tcamera.matrixWorld.copy( camera.matrix );\n\n\t\t} else {\n\n\t\t\tcamera.matrixWorld.multiplyMatrices( parent.matrixWorld, camera.matrix );\n\n\t\t}\n\n\t\tcamera.matrixWorldInverse.getInverse( camera.matrixWorld );\n\n\t}\n\n\tthis.getCamera = function ( camera ) {\n\n\t\tcameraVR.near = cameraR.near = cameraL.near = camera.near;\n\t\tcameraVR.far = cameraR.far = cameraL.far = camera.far;\n\n\t\tif ( _currentDepthNear !== cameraVR.near || _currentDepthFar !== cameraVR.far ) {\n\n\t\t\t// Note that the new renderState won't apply until the next frame. See #18320\n\n\t\t\tsession.updateRenderState( {\n\t\t\t\tdepthNear: cameraVR.near,\n\t\t\t\tdepthFar: cameraVR.far\n\t\t\t} );\n\n\t\t\t_currentDepthNear = cameraVR.near;\n\t\t\t_currentDepthFar = cameraVR.far;\n\n\t\t}\n\n\t\tvar parent = camera.parent;\n\t\tvar cameras = cameraVR.cameras;\n\n\t\tupdateCamera( cameraVR, parent );\n\n\t\tfor ( var i = 0; i < cameras.length; i ++ ) {\n\n\t\t\tupdateCamera( cameras[ i ], parent );\n\n\t\t}\n\n\t\t// update camera and its children\n\n\t\tcamera.matrixWorld.copy( cameraVR.matrixWorld );\n\n\t\tvar children = camera.children;\n\n\t\tfor ( var i = 0, l = children.length; i < l; i ++ ) {\n\n\t\t\tchildren[ i ].updateMatrixWorld( true );\n\n\t\t}\n\n\t\tsetProjectionFromUnion( cameraVR, cameraL, cameraR );\n\n\t\treturn cameraVR;\n\n\t};\n\n\t// Animation Loop\n\n\tvar onAnimationFrameCallback = null;\n\n\tfunction onAnimationFrame( time, frame ) {\n\n\t\tpose = frame.getViewerPose( referenceSpace );\n\n\t\tif ( pose !== null ) {\n\n\t\t\tvar views = pose.views;\n\t\t\tvar baseLayer = session.renderState.baseLayer;\n\n\t\t\trenderer.setFramebuffer( baseLayer.framebuffer );\n\n\t\t\tfor ( var i = 0; i < views.length; i ++ ) {\n\n\t\t\t\tvar view = views[ i ];\n\t\t\t\tvar viewport = baseLayer.getViewport( view );\n\n\t\t\t\tvar camera = cameraVR.cameras[ i ];\n\t\t\t\tcamera.matrix.fromArray( view.transform.matrix );\n\t\t\t\tcamera.projectionMatrix.fromArray( view.projectionMatrix );\n\t\t\t\tcamera.viewport.set( viewport.x, viewport.y, viewport.width, viewport.height );\n\n\t\t\t\tif ( i === 0 ) {\n\n\t\t\t\t\tcameraVR.matrix.copy( camera.matrix );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\t//\n\n\t\tvar inputSources = session.inputSources;\n\n\t\tfor ( var i = 0; i < controllers.length; i ++ ) {\n\n\t\t\tvar controller = controllers[ i ];\n\n\t\t\tvar inputSource = inputSources[ i ];\n\n\t\t\tvar inputPose = null;\n\t\t\tvar gripPose = null;\n\n\t\t\tif ( inputSource ) {\n\n\t\t\t\tif ( controller.targetRay ) {\n\n\t\t\t\t\tinputPose = frame.getPose( inputSource.targetRaySpace, referenceSpace );\n\n\t\t\t\t\tif ( inputPose !== null ) {\n\n\t\t\t\t\t\tcontroller.targetRay.matrix.fromArray( inputPose.transform.matrix );\n\t\t\t\t\t\tcontroller.targetRay.matrix.decompose( controller.targetRay.position, controller.targetRay.rotation, controller.targetRay.scale );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\tif ( controller.grip && inputSource.gripSpace ) {\n\n\t\t\t\t\tgripPose = frame.getPose( inputSource.gripSpace, referenceSpace );\n\n\t\t\t\t\tif ( gripPose !== null ) {\n\n\t\t\t\t\t\tcontroller.grip.matrix.fromArray( gripPose.transform.matrix );\n\t\t\t\t\t\tcontroller.grip.matrix.decompose( controller.grip.position, controller.grip.rotation, controller.grip.scale );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tif ( controller.targetRay ) {\n\n\t\t\t\tcontroller.targetRay.visible = inputPose !== null;\n\n\t\t\t}\n\n\t\t\tif ( controller.grip ) {\n\n\t\t\t\tcontroller.grip.visible = gripPose !== null;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( onAnimationFrameCallback ) onAnimationFrameCallback( time, frame );\n\n\t}\n\n\tvar animation = new WebGLAnimation();\n\tanimation.setAnimationLoop( onAnimationFrame );\n\n\tthis.setAnimationLoop = function ( callback ) {\n\n\t\tonAnimationFrameCallback = callback;\n\n\t};\n\n\tthis.dispose = function () {};\n\n}\n\nObject.assign( WebXRManager.prototype, EventDispatcher.prototype );\n\n/**\n * @author supereggbert / http://www.paulbrunt.co.uk/\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n * @author szimek / https://github.com/szimek/\n * @author tschw\n */\n\nfunction WebGLRenderer( parameters ) {\n\n\tparameters = parameters || {};\n\n\tvar _canvas = parameters.canvas !== undefined ? parameters.canvas : document.createElementNS( 'http://www.w3.org/1999/xhtml', 'canvas' ),\n\t\t_context = parameters.context !== undefined ? parameters.context : null,\n\n\t\t_alpha = parameters.alpha !== undefined ? parameters.alpha : false,\n\t\t_depth = parameters.depth !== undefined ? parameters.depth : true,\n\t\t_stencil = parameters.stencil !== undefined ? parameters.stencil : true,\n\t\t_antialias = parameters.antialias !== undefined ? parameters.antialias : false,\n\t\t_premultipliedAlpha = parameters.premultipliedAlpha !== undefined ? parameters.premultipliedAlpha : true,\n\t\t_preserveDrawingBuffer = parameters.preserveDrawingBuffer !== undefined ? parameters.preserveDrawingBuffer : false,\n\t\t_powerPreference = parameters.powerPreference !== undefined ? parameters.powerPreference : 'default',\n\t\t_failIfMajorPerformanceCaveat = parameters.failIfMajorPerformanceCaveat !== undefined ? parameters.failIfMajorPerformanceCaveat : false;\n\n\tvar currentRenderList = null;\n\tvar currentRenderState = null;\n\n\t// public properties\n\n\tthis.domElement = _canvas;\n\n\t// Debug configuration container\n\tthis.debug = {\n\n\t\t/**\n\t\t * Enables error checking and reporting when shader programs are being compiled\n\t\t * @type {boolean}\n\t\t */\n\t\tcheckShaderErrors: true\n\t};\n\n\t// clearing\n\n\tthis.autoClear = true;\n\tthis.autoClearColor = true;\n\tthis.autoClearDepth = true;\n\tthis.autoClearStencil = true;\n\n\t// scene graph\n\n\tthis.sortObjects = true;\n\n\t// user-defined clipping\n\n\tthis.clippingPlanes = [];\n\tthis.localClippingEnabled = false;\n\n\t// physically based shading\n\n\tthis.gammaFactor = 2.0;\t// for backwards compatibility\n\tthis.outputEncoding = LinearEncoding;\n\n\t// physical lights\n\n\tthis.physicallyCorrectLights = false;\n\n\t// tone mapping\n\n\tthis.toneMapping = LinearToneMapping;\n\tthis.toneMappingExposure = 1.0;\n\tthis.toneMappingWhitePoint = 1.0;\n\n\t// morphs\n\n\tthis.maxMorphTargets = 8;\n\tthis.maxMorphNormals = 4;\n\n\t// internal properties\n\n\tvar _this = this,\n\n\t\t_isContextLost = false,\n\n\t\t// internal state cache\n\n\t\t_framebuffer = null,\n\n\t\t_currentActiveCubeFace = 0,\n\t\t_currentActiveMipmapLevel = 0,\n\t\t_currentRenderTarget = null,\n\t\t_currentFramebuffer = null,\n\t\t_currentMaterialId = - 1,\n\n\t\t// geometry and program caching\n\n\t\t_currentGeometryProgram = {\n\t\t\tgeometry: null,\n\t\t\tprogram: null,\n\t\t\twireframe: false\n\t\t},\n\n\t\t_currentCamera = null,\n\t\t_currentArrayCamera = null,\n\n\t\t_currentViewport = new Vector4(),\n\t\t_currentScissor = new Vector4(),\n\t\t_currentScissorTest = null,\n\n\t\t//\n\n\t\t_width = _canvas.width,\n\t\t_height = _canvas.height,\n\n\t\t_pixelRatio = 1,\n\t\t_opaqueSort = null,\n\t\t_transparentSort = null,\n\n\t\t_viewport = new Vector4( 0, 0, _width, _height ),\n\t\t_scissor = new Vector4( 0, 0, _width, _height ),\n\t\t_scissorTest = false,\n\n\t\t// frustum\n\n\t\t_frustum = new Frustum(),\n\n\t\t// clipping\n\n\t\t_clipping = new WebGLClipping(),\n\t\t_clippingEnabled = false,\n\t\t_localClippingEnabled = false,\n\n\t\t// camera matrices cache\n\n\t\t_projScreenMatrix = new Matrix4(),\n\n\t\t_vector3 = new Vector3();\n\n\tfunction getTargetPixelRatio() {\n\n\t\treturn _currentRenderTarget === null ? _pixelRatio : 1;\n\n\t}\n\n\t// initialize\n\n\tvar _gl;\n\n\ttry {\n\n\t\tvar contextAttributes = {\n\t\t\talpha: _alpha,\n\t\t\tdepth: _depth,\n\t\t\tstencil: _stencil,\n\t\t\tantialias: _antialias,\n\t\t\tpremultipliedAlpha: _premultipliedAlpha,\n\t\t\tpreserveDrawingBuffer: _preserveDrawingBuffer,\n\t\t\tpowerPreference: _powerPreference,\n\t\t\tfailIfMajorPerformanceCaveat: _failIfMajorPerformanceCaveat,\n\t\t\txrCompatible: true\n\t\t};\n\n\t\t// event listeners must be registered before WebGL context is created, see #12753\n\n\t\t_canvas.addEventListener( 'webglcontextlost', onContextLost, false );\n\t\t_canvas.addEventListener( 'webglcontextrestored', onContextRestore, false );\n\n\t\t_gl = _context || _canvas.getContext( 'webgl', contextAttributes ) || _canvas.getContext( 'experimental-webgl', contextAttributes );\n\n\t\tif ( _gl === null ) {\n\n\t\t\tif ( _canvas.getContext( 'webgl' ) !== null ) {\n\n\t\t\t\tthrow new Error( 'Error creating WebGL context with your selected attributes.' );\n\n\t\t\t} else {\n\n\t\t\t\tthrow new Error( 'Error creating WebGL context.' );\n\n\t\t\t}\n\n\t\t}\n\n\t\t// Some experimental-webgl implementations do not have getShaderPrecisionFormat\n\n\t\tif ( _gl.getShaderPrecisionFormat === undefined ) {\n\n\t\t\t_gl.getShaderPrecisionFormat = function () {\n\n\t\t\t\treturn { 'rangeMin': 1, 'rangeMax': 1, 'precision': 1 };\n\n\t\t\t};\n\n\t\t}\n\n\t} catch ( error ) {\n\n\t\tconsole.error( 'THREE.WebGLRenderer: ' + error.message );\n\t\tthrow error;\n\n\t}\n\n\tvar extensions, capabilities, state, info;\n\tvar properties, textures, attributes, geometries, objects;\n\tvar programCache, renderLists, renderStates;\n\n\tvar background, morphtargets, bufferRenderer, indexedBufferRenderer;\n\n\tvar utils;\n\n\tfunction initGLContext() {\n\n\t\textensions = new WebGLExtensions( _gl );\n\n\t\tcapabilities = new WebGLCapabilities( _gl, extensions, parameters );\n\n\t\tif ( capabilities.isWebGL2 === false ) {\n\n\t\t\textensions.get( 'WEBGL_depth_texture' );\n\t\t\textensions.get( 'OES_texture_float' );\n\t\t\textensions.get( 'OES_texture_half_float' );\n\t\t\textensions.get( 'OES_texture_half_float_linear' );\n\t\t\textensions.get( 'OES_standard_derivatives' );\n\t\t\textensions.get( 'OES_element_index_uint' );\n\t\t\textensions.get( 'ANGLE_instanced_arrays' );\n\n\t\t}\n\n\t\textensions.get( 'OES_texture_float_linear' );\n\n\t\tutils = new WebGLUtils( _gl, extensions, capabilities );\n\n\t\tstate = new WebGLState( _gl, extensions, capabilities );\n\t\tstate.scissor( _currentScissor.copy( _scissor ).multiplyScalar( _pixelRatio ).floor() );\n\t\tstate.viewport( _currentViewport.copy( _viewport ).multiplyScalar( _pixelRatio ).floor() );\n\n\t\tinfo = new WebGLInfo( _gl );\n\t\tproperties = new WebGLProperties();\n\t\ttextures = new WebGLTextures( _gl, extensions, state, properties, capabilities, utils, info );\n\t\tattributes = new WebGLAttributes( _gl, capabilities );\n\t\tgeometries = new WebGLGeometries( _gl, attributes, info );\n\t\tobjects = new WebGLObjects( _gl, geometries, attributes, info );\n\t\tmorphtargets = new WebGLMorphtargets( _gl );\n\t\tprogramCache = new WebGLPrograms( _this, extensions, capabilities );\n\t\trenderLists = new WebGLRenderLists();\n\t\trenderStates = new WebGLRenderStates();\n\n\t\tbackground = new WebGLBackground( _this, state, objects, _premultipliedAlpha );\n\n\t\tbufferRenderer = new WebGLBufferRenderer( _gl, extensions, info, capabilities );\n\t\tindexedBufferRenderer = new WebGLIndexedBufferRenderer( _gl, extensions, info, capabilities );\n\n\t\tinfo.programs = programCache.programs;\n\n\t\t_this.capabilities = capabilities;\n\t\t_this.extensions = extensions;\n\t\t_this.properties = properties;\n\t\t_this.renderLists = renderLists;\n\t\t_this.state = state;\n\t\t_this.info = info;\n\n\t}\n\n\tinitGLContext();\n\n\t// xr\n\n\tvar xr = new WebXRManager( _this, _gl );\n\n\tthis.xr = xr;\n\n\t// shadow map\n\n\tvar shadowMap = new WebGLShadowMap( _this, objects, capabilities.maxTextureSize );\n\n\tthis.shadowMap = shadowMap;\n\n\t// API\n\n\tthis.getContext = function () {\n\n\t\treturn _gl;\n\n\t};\n\n\tthis.getContextAttributes = function () {\n\n\t\treturn _gl.getContextAttributes();\n\n\t};\n\n\tthis.forceContextLoss = function () {\n\n\t\tvar extension = extensions.get( 'WEBGL_lose_context' );\n\t\tif ( extension ) extension.loseContext();\n\n\t};\n\n\tthis.forceContextRestore = function () {\n\n\t\tvar extension = extensions.get( 'WEBGL_lose_context' );\n\t\tif ( extension ) extension.restoreContext();\n\n\t};\n\n\tthis.getPixelRatio = function () {\n\n\t\treturn _pixelRatio;\n\n\t};\n\n\tthis.setPixelRatio = function ( value ) {\n\n\t\tif ( value === undefined ) return;\n\n\t\t_pixelRatio = value;\n\n\t\tthis.setSize( _width, _height, false );\n\n\t};\n\n\tthis.getSize = function ( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'WebGLRenderer: .getsize() now requires a Vector2 as an argument' );\n\n\t\t\ttarget = new Vector2();\n\n\t\t}\n\n\t\treturn target.set( _width, _height );\n\n\t};\n\n\tthis.setSize = function ( width, height, updateStyle ) {\n\n\t\tif ( xr.isPresenting ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: Can\\'t change size while VR device is presenting.' );\n\t\t\treturn;\n\n\t\t}\n\n\t\t_width = width;\n\t\t_height = height;\n\n\t\t_canvas.width = Math.floor( width * _pixelRatio );\n\t\t_canvas.height = Math.floor( height * _pixelRatio );\n\n\t\tif ( updateStyle !== false ) {\n\n\t\t\t_canvas.style.width = width + 'px';\n\t\t\t_canvas.style.height = height + 'px';\n\n\t\t}\n\n\t\tthis.setViewport( 0, 0, width, height );\n\n\t};\n\n\tthis.getDrawingBufferSize = function ( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'WebGLRenderer: .getdrawingBufferSize() now requires a Vector2 as an argument' );\n\n\t\t\ttarget = new Vector2();\n\n\t\t}\n\n\t\treturn target.set( _width * _pixelRatio, _height * _pixelRatio ).floor();\n\n\t};\n\n\tthis.setDrawingBufferSize = function ( width, height, pixelRatio ) {\n\n\t\t_width = width;\n\t\t_height = height;\n\n\t\t_pixelRatio = pixelRatio;\n\n\t\t_canvas.width = Math.floor( width * pixelRatio );\n\t\t_canvas.height = Math.floor( height * pixelRatio );\n\n\t\tthis.setViewport( 0, 0, width, height );\n\n\t};\n\n\tthis.getCurrentViewport = function ( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'WebGLRenderer: .getCurrentViewport() now requires a Vector4 as an argument' );\n\n\t\t\ttarget = new Vector4();\n\n\t\t}\n\n\t\treturn target.copy( _currentViewport );\n\n\t};\n\n\tthis.getViewport = function ( target ) {\n\n\t\treturn target.copy( _viewport );\n\n\t};\n\n\tthis.setViewport = function ( x, y, width, height ) {\n\n\t\tif ( x.isVector4 ) {\n\n\t\t\t_viewport.set( x.x, x.y, x.z, x.w );\n\n\t\t} else {\n\n\t\t\t_viewport.set( x, y, width, height );\n\n\t\t}\n\n\t\tstate.viewport( _currentViewport.copy( _viewport ).multiplyScalar( _pixelRatio ).floor() );\n\n\t};\n\n\tthis.getScissor = function ( target ) {\n\n\t\treturn target.copy( _scissor );\n\n\t};\n\n\tthis.setScissor = function ( x, y, width, height ) {\n\n\t\tif ( x.isVector4 ) {\n\n\t\t\t_scissor.set( x.x, x.y, x.z, x.w );\n\n\t\t} else {\n\n\t\t\t_scissor.set( x, y, width, height );\n\n\t\t}\n\n\t\tstate.scissor( _currentScissor.copy( _scissor ).multiplyScalar( _pixelRatio ).floor() );\n\n\t};\n\n\tthis.getScissorTest = function () {\n\n\t\treturn _scissorTest;\n\n\t};\n\n\tthis.setScissorTest = function ( boolean ) {\n\n\t\tstate.setScissorTest( _scissorTest = boolean );\n\n\t};\n\n\tthis.setOpaqueSort = function ( method ) {\n\n\t\t_opaqueSort = method;\n\n\t};\n\n\tthis.setTransparentSort = function ( method ) {\n\n\t\t_transparentSort = method;\n\n\t};\n\n\t// Clearing\n\n\tthis.getClearColor = function () {\n\n\t\treturn background.getClearColor();\n\n\t};\n\n\tthis.setClearColor = function () {\n\n\t\tbackground.setClearColor.apply( background, arguments );\n\n\t};\n\n\tthis.getClearAlpha = function () {\n\n\t\treturn background.getClearAlpha();\n\n\t};\n\n\tthis.setClearAlpha = function () {\n\n\t\tbackground.setClearAlpha.apply( background, arguments );\n\n\t};\n\n\tthis.clear = function ( color, depth, stencil ) {\n\n\t\tvar bits = 0;\n\n\t\tif ( color === undefined || color ) bits |= 16384;\n\t\tif ( depth === undefined || depth ) bits |= 256;\n\t\tif ( stencil === undefined || stencil ) bits |= 1024;\n\n\t\t_gl.clear( bits );\n\n\t};\n\n\tthis.clearColor = function () {\n\n\t\tthis.clear( true, false, false );\n\n\t};\n\n\tthis.clearDepth = function () {\n\n\t\tthis.clear( false, true, false );\n\n\t};\n\n\tthis.clearStencil = function () {\n\n\t\tthis.clear( false, false, true );\n\n\t};\n\n\t//\n\n\tthis.dispose = function () {\n\n\t\t_canvas.removeEventListener( 'webglcontextlost', onContextLost, false );\n\t\t_canvas.removeEventListener( 'webglcontextrestored', onContextRestore, false );\n\n\t\trenderLists.dispose();\n\t\trenderStates.dispose();\n\t\tproperties.dispose();\n\t\tobjects.dispose();\n\n\t\txr.dispose();\n\n\t\tanimation.stop();\n\n\t};\n\n\t// Events\n\n\tfunction onContextLost( event ) {\n\n\t\tevent.preventDefault();\n\n\t\tconsole.log( 'THREE.WebGLRenderer: Context Lost.' );\n\n\t\t_isContextLost = true;\n\n\t}\n\n\tfunction onContextRestore( /* event */ ) {\n\n\t\tconsole.log( 'THREE.WebGLRenderer: Context Restored.' );\n\n\t\t_isContextLost = false;\n\n\t\tinitGLContext();\n\n\t}\n\n\tfunction onMaterialDispose( event ) {\n\n\t\tvar material = event.target;\n\n\t\tmaterial.removeEventListener( 'dispose', onMaterialDispose );\n\n\t\tdeallocateMaterial( material );\n\n\t}\n\n\t// Buffer deallocation\n\n\tfunction deallocateMaterial( material ) {\n\n\t\treleaseMaterialProgramReference( material );\n\n\t\tproperties.remove( material );\n\n\t}\n\n\n\tfunction releaseMaterialProgramReference( material ) {\n\n\t\tvar programInfo = properties.get( material ).program;\n\n\t\tmaterial.program = undefined;\n\n\t\tif ( programInfo !== undefined ) {\n\n\t\t\tprogramCache.releaseProgram( programInfo );\n\n\t\t}\n\n\t}\n\n\t// Buffer rendering\n\n\tfunction renderObjectImmediate( object, program ) {\n\n\t\tobject.render( function ( object ) {\n\n\t\t\t_this.renderBufferImmediate( object, program );\n\n\t\t} );\n\n\t}\n\n\tthis.renderBufferImmediate = function ( object, program ) {\n\n\t\tstate.initAttributes();\n\n\t\tvar buffers = properties.get( object );\n\n\t\tif ( object.hasPositions && ! buffers.position ) buffers.position = _gl.createBuffer();\n\t\tif ( object.hasNormals && ! buffers.normal ) buffers.normal = _gl.createBuffer();\n\t\tif ( object.hasUvs && ! buffers.uv ) buffers.uv = _gl.createBuffer();\n\t\tif ( object.hasColors && ! buffers.color ) buffers.color = _gl.createBuffer();\n\n\t\tvar programAttributes = program.getAttributes();\n\n\t\tif ( object.hasPositions ) {\n\n\t\t\t_gl.bindBuffer( 34962, buffers.position );\n\t\t\t_gl.bufferData( 34962, object.positionArray, 35048 );\n\n\t\t\tstate.enableAttribute( programAttributes.position );\n\t\t\t_gl.vertexAttribPointer( programAttributes.position, 3, 5126, false, 0, 0 );\n\n\t\t}\n\n\t\tif ( object.hasNormals ) {\n\n\t\t\t_gl.bindBuffer( 34962, buffers.normal );\n\t\t\t_gl.bufferData( 34962, object.normalArray, 35048 );\n\n\t\t\tstate.enableAttribute( programAttributes.normal );\n\t\t\t_gl.vertexAttribPointer( programAttributes.normal, 3, 5126, false, 0, 0 );\n\n\t\t}\n\n\t\tif ( object.hasUvs ) {\n\n\t\t\t_gl.bindBuffer( 34962, buffers.uv );\n\t\t\t_gl.bufferData( 34962, object.uvArray, 35048 );\n\n\t\t\tstate.enableAttribute( programAttributes.uv );\n\t\t\t_gl.vertexAttribPointer( programAttributes.uv, 2, 5126, false, 0, 0 );\n\n\t\t}\n\n\t\tif ( object.hasColors ) {\n\n\t\t\t_gl.bindBuffer( 34962, buffers.color );\n\t\t\t_gl.bufferData( 34962, object.colorArray, 35048 );\n\n\t\t\tstate.enableAttribute( programAttributes.color );\n\t\t\t_gl.vertexAttribPointer( programAttributes.color, 3, 5126, false, 0, 0 );\n\n\t\t}\n\n\t\tstate.disableUnusedAttributes();\n\n\t\t_gl.drawArrays( 4, 0, object.count );\n\n\t\tobject.count = 0;\n\n\t};\n\n\tvar tempScene = new Scene();\n\n\tthis.renderBufferDirect = function ( camera, scene, geometry, material, object, group ) {\n\n\t\tif ( scene === null ) scene = tempScene; // renderBufferDirect second parameter used to be fog (could be null)\n\n\t\tvar frontFaceCW = ( object.isMesh && object.matrixWorld.determinant() < 0 );\n\n\t\tvar program = setProgram( camera, scene, material, object );\n\n\t\tstate.setMaterial( material, frontFaceCW );\n\n\t\tvar updateBuffers = false;\n\n\t\tif ( _currentGeometryProgram.geometry !== geometry.id ||\n\t\t\t_currentGeometryProgram.program !== program.id ||\n\t\t\t_currentGeometryProgram.wireframe !== ( material.wireframe === true ) ) {\n\n\t\t\t_currentGeometryProgram.geometry = geometry.id;\n\t\t\t_currentGeometryProgram.program = program.id;\n\t\t\t_currentGeometryProgram.wireframe = material.wireframe === true;\n\t\t\tupdateBuffers = true;\n\n\t\t}\n\n\t\tif ( material.morphTargets || material.morphNormals ) {\n\n\t\t\tmorphtargets.update( object, geometry, material, program );\n\n\t\t\tupdateBuffers = true;\n\n\t\t}\n\n\t\t//\n\n\t\tvar index = geometry.index;\n\t\tvar position = geometry.attributes.position;\n\n\t\t//\n\n\t\tif ( index === null ) {\n\n\t\t\tif ( position === undefined || position.count === 0 ) return;\n\n\t\t} else if ( index.count === 0 ) {\n\n\t\t\treturn;\n\n\t\t}\n\n\t\t//\n\n\t\tvar rangeFactor = 1;\n\n\t\tif ( material.wireframe === true ) {\n\n\t\t\tindex = geometries.getWireframeAttribute( geometry );\n\t\t\trangeFactor = 2;\n\n\t\t}\n\n\t\tvar attribute;\n\t\tvar renderer = bufferRenderer;\n\n\t\tif ( index !== null ) {\n\n\t\t\tattribute = attributes.get( index );\n\n\t\t\trenderer = indexedBufferRenderer;\n\t\t\trenderer.setIndex( attribute );\n\n\t\t}\n\n\t\tif ( updateBuffers ) {\n\n\t\t\tsetupVertexAttributes( object, geometry, material, program );\n\n\t\t\tif ( index !== null ) {\n\n\t\t\t\t_gl.bindBuffer( 34963, attribute.buffer );\n\n\t\t\t}\n\n\t\t}\n\n\t\t//\n\n\t\tvar dataCount = ( index !== null ) ? index.count : position.count;\n\n\t\tvar rangeStart = geometry.drawRange.start * rangeFactor;\n\t\tvar rangeCount = geometry.drawRange.count * rangeFactor;\n\n\t\tvar groupStart = group !== null ? group.start * rangeFactor : 0;\n\t\tvar groupCount = group !== null ? group.count * rangeFactor : Infinity;\n\n\t\tvar drawStart = Math.max( rangeStart, groupStart );\n\t\tvar drawEnd = Math.min( dataCount, rangeStart + rangeCount, groupStart + groupCount ) - 1;\n\n\t\tvar drawCount = Math.max( 0, drawEnd - drawStart + 1 );\n\n\t\tif ( drawCount === 0 ) return;\n\n\t\t//\n\n\t\tif ( object.isMesh ) {\n\n\t\t\tif ( material.wireframe === true ) {\n\n\t\t\t\tstate.setLineWidth( material.wireframeLinewidth * getTargetPixelRatio() );\n\t\t\t\trenderer.setMode( 1 );\n\n\t\t\t} else {\n\n\t\t\t\trenderer.setMode( 4 );\n\n\t\t\t}\n\n\t\t} else if ( object.isLine ) {\n\n\t\t\tvar lineWidth = material.linewidth;\n\n\t\t\tif ( lineWidth === undefined ) lineWidth = 1; // Not using Line*Material\n\n\t\t\tstate.setLineWidth( lineWidth * getTargetPixelRatio() );\n\n\t\t\tif ( object.isLineSegments ) {\n\n\t\t\t\trenderer.setMode( 1 );\n\n\t\t\t} else if ( object.isLineLoop ) {\n\n\t\t\t\trenderer.setMode( 2 );\n\n\t\t\t} else {\n\n\t\t\t\trenderer.setMode( 3 );\n\n\t\t\t}\n\n\t\t} else if ( object.isPoints ) {\n\n\t\t\trenderer.setMode( 0 );\n\n\t\t} else if ( object.isSprite ) {\n\n\t\t\trenderer.setMode( 4 );\n\n\t\t}\n\n\t\tif ( object.isInstancedMesh ) {\n\n\t\t\trenderer.renderInstances( geometry, drawStart, drawCount, object.count );\n\n\t\t} else if ( geometry.isInstancedBufferGeometry ) {\n\n\t\t\trenderer.renderInstances( geometry, drawStart, drawCount, geometry.maxInstancedCount );\n\n\t\t} else {\n\n\t\t\trenderer.render( drawStart, drawCount );\n\n\t\t}\n\n\t};\n\n\tfunction setupVertexAttributes( object, geometry, material, program ) {\n\n\t\tif ( capabilities.isWebGL2 === false && ( object.isInstancedMesh || geometry.isInstancedBufferGeometry ) ) {\n\n\t\t\tif ( extensions.get( 'ANGLE_instanced_arrays' ) === null ) return;\n\n\t\t}\n\n\t\tstate.initAttributes();\n\n\t\tvar geometryAttributes = geometry.attributes;\n\n\t\tvar programAttributes = program.getAttributes();\n\n\t\tvar materialDefaultAttributeValues = material.defaultAttributeValues;\n\n\t\tfor ( var name in programAttributes ) {\n\n\t\t\tvar programAttribute = programAttributes[ name ];\n\n\t\t\tif ( programAttribute >= 0 ) {\n\n\t\t\t\tvar geometryAttribute = geometryAttributes[ name ];\n\n\t\t\t\tif ( geometryAttribute !== undefined ) {\n\n\t\t\t\t\tvar normalized = geometryAttribute.normalized;\n\t\t\t\t\tvar size = geometryAttribute.itemSize;\n\n\t\t\t\t\tvar attribute = attributes.get( geometryAttribute );\n\n\t\t\t\t\t// TODO Attribute may not be available on context restore\n\n\t\t\t\t\tif ( attribute === undefined ) continue;\n\n\t\t\t\t\tvar buffer = attribute.buffer;\n\t\t\t\t\tvar type = attribute.type;\n\t\t\t\t\tvar bytesPerElement = attribute.bytesPerElement;\n\n\t\t\t\t\tif ( geometryAttribute.isInterleavedBufferAttribute ) {\n\n\t\t\t\t\t\tvar data = geometryAttribute.data;\n\t\t\t\t\t\tvar stride = data.stride;\n\t\t\t\t\t\tvar offset = geometryAttribute.offset;\n\n\t\t\t\t\t\tif ( data && data.isInstancedInterleavedBuffer ) {\n\n\t\t\t\t\t\t\tstate.enableAttributeAndDivisor( programAttribute, data.meshPerAttribute );\n\n\t\t\t\t\t\t\tif ( geometry.maxInstancedCount === undefined ) {\n\n\t\t\t\t\t\t\t\tgeometry.maxInstancedCount = data.meshPerAttribute * data.count;\n\n\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t} else {\n\n\t\t\t\t\t\t\tstate.enableAttribute( programAttribute );\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\t_gl.bindBuffer( 34962, buffer );\n\t\t\t\t\t\t_gl.vertexAttribPointer( programAttribute, size, type, normalized, stride * bytesPerElement, offset * bytesPerElement );\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\tif ( geometryAttribute.isInstancedBufferAttribute ) {\n\n\t\t\t\t\t\t\tstate.enableAttributeAndDivisor( programAttribute, geometryAttribute.meshPerAttribute );\n\n\t\t\t\t\t\t\tif ( geometry.maxInstancedCount === undefined ) {\n\n\t\t\t\t\t\t\t\tgeometry.maxInstancedCount = geometryAttribute.meshPerAttribute * geometryAttribute.count;\n\n\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t} else {\n\n\t\t\t\t\t\t\tstate.enableAttribute( programAttribute );\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\t_gl.bindBuffer( 34962, buffer );\n\t\t\t\t\t\t_gl.vertexAttribPointer( programAttribute, size, type, normalized, 0, 0 );\n\n\t\t\t\t\t}\n\n\t\t\t\t} else if ( name === 'instanceMatrix' ) {\n\n\t\t\t\t\tvar attribute = attributes.get( object.instanceMatrix );\n\n\t\t\t\t\t// TODO Attribute may not be available on context restore\n\n\t\t\t\t\tif ( attribute === undefined ) continue;\n\n\t\t\t\t\tvar buffer = attribute.buffer;\n\t\t\t\t\tvar type = attribute.type;\n\n\t\t\t\t\tstate.enableAttributeAndDivisor( programAttribute + 0, 1 );\n\t\t\t\t\tstate.enableAttributeAndDivisor( programAttribute + 1, 1 );\n\t\t\t\t\tstate.enableAttributeAndDivisor( programAttribute + 2, 1 );\n\t\t\t\t\tstate.enableAttributeAndDivisor( programAttribute + 3, 1 );\n\n\t\t\t\t\t_gl.bindBuffer( 34962, buffer );\n\n\t\t\t\t\t_gl.vertexAttribPointer( programAttribute + 0, 4, type, false, 64, 0 );\n\t\t\t\t\t_gl.vertexAttribPointer( programAttribute + 1, 4, type, false, 64, 16 );\n\t\t\t\t\t_gl.vertexAttribPointer( programAttribute + 2, 4, type, false, 64, 32 );\n\t\t\t\t\t_gl.vertexAttribPointer( programAttribute + 3, 4, type, false, 64, 48 );\n\n\t\t\t\t} else if ( materialDefaultAttributeValues !== undefined ) {\n\n\t\t\t\t\tvar value = materialDefaultAttributeValues[ name ];\n\n\t\t\t\t\tif ( value !== undefined ) {\n\n\t\t\t\t\t\tswitch ( value.length ) {\n\n\t\t\t\t\t\t\tcase 2:\n\t\t\t\t\t\t\t\t_gl.vertexAttrib2fv( programAttribute, value );\n\t\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\t\tcase 3:\n\t\t\t\t\t\t\t\t_gl.vertexAttrib3fv( programAttribute, value );\n\t\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\t\tcase 4:\n\t\t\t\t\t\t\t\t_gl.vertexAttrib4fv( programAttribute, value );\n\t\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\t\tdefault:\n\t\t\t\t\t\t\t\t_gl.vertexAttrib1fv( programAttribute, value );\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\tstate.disableUnusedAttributes();\n\n\t}\n\n\t// Compile\n\n\tthis.compile = function ( scene, camera ) {\n\n\t\tcurrentRenderState = renderStates.get( scene, camera );\n\t\tcurrentRenderState.init();\n\n\t\tscene.traverse( function ( object ) {\n\n\t\t\tif ( object.isLight ) {\n\n\t\t\t\tcurrentRenderState.pushLight( object );\n\n\t\t\t\tif ( object.castShadow ) {\n\n\t\t\t\t\tcurrentRenderState.pushShadow( object );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t} );\n\n\t\tcurrentRenderState.setupLights( camera );\n\n\t\tvar compiled = {};\n\n\t\tscene.traverse( function ( object ) {\n\n\t\t\tif ( object.material ) {\n\n\t\t\t\tif ( Array.isArray( object.material ) ) {\n\n\t\t\t\t\tfor ( var i = 0; i < object.material.length; i ++ ) {\n\n\t\t\t\t\t\tif ( object.material[ i ].uuid in compiled === false ) {\n\n\t\t\t\t\t\t\tinitMaterial( object.material[ i ], scene, object );\n\t\t\t\t\t\t\tcompiled[ object.material[ i ].uuid ] = true;\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t} else if ( object.material.uuid in compiled === false ) {\n\n\t\t\t\t\tinitMaterial( object.material, scene, object );\n\t\t\t\t\tcompiled[ object.material.uuid ] = true;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t} );\n\n\t};\n\n\t// Animation Loop\n\n\tvar onAnimationFrameCallback = null;\n\n\tfunction onAnimationFrame( time ) {\n\n\t\tif ( xr.isPresenting ) return;\n\t\tif ( onAnimationFrameCallback ) onAnimationFrameCallback( time );\n\n\t}\n\n\tvar animation = new WebGLAnimation();\n\tanimation.setAnimationLoop( onAnimationFrame );\n\n\tif ( typeof window !== 'undefined' ) animation.setContext( window );\n\n\tthis.setAnimationLoop = function ( callback ) {\n\n\t\tonAnimationFrameCallback = callback;\n\t\txr.setAnimationLoop( callback );\n\n\t\tanimation.start();\n\n\t};\n\n\t// Rendering\n\n\tthis.render = function ( scene, camera ) {\n\n\t\tvar renderTarget, forceClear;\n\n\t\tif ( arguments[ 2 ] !== undefined ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer.render(): the renderTarget argument has been removed. Use .setRenderTarget() instead.' );\n\t\t\trenderTarget = arguments[ 2 ];\n\n\t\t}\n\n\t\tif ( arguments[ 3 ] !== undefined ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer.render(): the forceClear argument has been removed. Use .clear() instead.' );\n\t\t\tforceClear = arguments[ 3 ];\n\n\t\t}\n\n\t\tif ( ! ( camera && camera.isCamera ) ) {\n\n\t\t\tconsole.error( 'THREE.WebGLRenderer.render: camera is not an instance of THREE.Camera.' );\n\t\t\treturn;\n\n\t\t}\n\n\t\tif ( _isContextLost ) return;\n\n\t\t// reset caching for this frame\n\n\t\t_currentGeometryProgram.geometry = null;\n\t\t_currentGeometryProgram.program = null;\n\t\t_currentGeometryProgram.wireframe = false;\n\t\t_currentMaterialId = - 1;\n\t\t_currentCamera = null;\n\n\t\t// update scene graph\n\n\t\tif ( scene.autoUpdate === true ) scene.updateMatrixWorld();\n\n\t\t// update camera matrices and frustum\n\n\t\tif ( camera.parent === null ) camera.updateMatrixWorld();\n\n\t\tif ( xr.enabled && xr.isPresenting ) {\n\n\t\t\tcamera = xr.getCamera( camera );\n\n\t\t}\n\n\t\t//\n\n\t\tcurrentRenderState = renderStates.get( scene, camera );\n\t\tcurrentRenderState.init();\n\n\t\tscene.onBeforeRender( _this, scene, camera, renderTarget || _currentRenderTarget );\n\n\t\t_projScreenMatrix.multiplyMatrices( camera.projectionMatrix, camera.matrixWorldInverse );\n\t\t_frustum.setFromProjectionMatrix( _projScreenMatrix );\n\n\t\t_localClippingEnabled = this.localClippingEnabled;\n\t\t_clippingEnabled = _clipping.init( this.clippingPlanes, _localClippingEnabled, camera );\n\n\t\tcurrentRenderList = renderLists.get( scene, camera );\n\t\tcurrentRenderList.init();\n\n\t\tprojectObject( scene, camera, 0, _this.sortObjects );\n\n\t\tcurrentRenderList.finish();\n\n\t\tif ( _this.sortObjects === true ) {\n\n\t\t\tcurrentRenderList.sort( _opaqueSort, _transparentSort );\n\n\t\t}\n\n\t\t//\n\n\t\tif ( _clippingEnabled ) _clipping.beginShadows();\n\n\t\tvar shadowsArray = currentRenderState.state.shadowsArray;\n\n\t\tshadowMap.render( shadowsArray, scene, camera );\n\n\t\tcurrentRenderState.setupLights( camera );\n\n\t\tif ( _clippingEnabled ) _clipping.endShadows();\n\n\t\t//\n\n\t\tif ( this.info.autoReset ) this.info.reset();\n\n\t\tif ( renderTarget !== undefined ) {\n\n\t\t\tthis.setRenderTarget( renderTarget );\n\n\t\t}\n\n\t\t//\n\n\t\tbackground.render( currentRenderList, scene, camera, forceClear );\n\n\t\t// render scene\n\n\t\tvar opaqueObjects = currentRenderList.opaque;\n\t\tvar transparentObjects = currentRenderList.transparent;\n\n\t\tif ( scene.overrideMaterial ) {\n\n\t\t\tvar overrideMaterial = scene.overrideMaterial;\n\n\t\t\tif ( opaqueObjects.length ) renderObjects( opaqueObjects, scene, camera, overrideMaterial );\n\t\t\tif ( transparentObjects.length ) renderObjects( transparentObjects, scene, camera, overrideMaterial );\n\n\t\t} else {\n\n\t\t\t// opaque pass (front-to-back order)\n\n\t\t\tif ( opaqueObjects.length ) renderObjects( opaqueObjects, scene, camera );\n\n\t\t\t// transparent pass (back-to-front order)\n\n\t\t\tif ( transparentObjects.length ) renderObjects( transparentObjects, scene, camera );\n\n\t\t}\n\n\t\t//\n\n\t\tscene.onAfterRender( _this, scene, camera );\n\n\t\t//\n\n\t\tif ( _currentRenderTarget !== null ) {\n\n\t\t\t// Generate mipmap if we're using any kind of mipmap filtering\n\n\t\t\ttextures.updateRenderTargetMipmap( _currentRenderTarget );\n\n\t\t\t// resolve multisample renderbuffers to a single-sample texture if necessary\n\n\t\t\ttextures.updateMultisampleRenderTarget( _currentRenderTarget );\n\n\t\t}\n\n\t\t// Ensure depth buffer writing is enabled so it can be cleared on next render\n\n\t\tstate.buffers.depth.setTest( true );\n\t\tstate.buffers.depth.setMask( true );\n\t\tstate.buffers.color.setMask( true );\n\n\t\tstate.setPolygonOffset( false );\n\n\t\t// _gl.finish();\n\n\t\tcurrentRenderList = null;\n\t\tcurrentRenderState = null;\n\n\t};\n\n\tfunction projectObject( object, camera, groupOrder, sortObjects ) {\n\n\t\tif ( object.visible === false ) return;\n\n\t\tvar visible = object.layers.test( camera.layers );\n\n\t\tif ( visible ) {\n\n\t\t\tif ( object.isGroup ) {\n\n\t\t\t\tgroupOrder = object.renderOrder;\n\n\t\t\t} else if ( object.isLOD ) {\n\n\t\t\t\tif ( object.autoUpdate === true ) object.update( camera );\n\n\t\t\t} else if ( object.isLight ) {\n\n\t\t\t\tcurrentRenderState.pushLight( object );\n\n\t\t\t\tif ( object.castShadow ) {\n\n\t\t\t\t\tcurrentRenderState.pushShadow( object );\n\n\t\t\t\t}\n\n\t\t\t} else if ( object.isSprite ) {\n\n\t\t\t\tif ( ! object.frustumCulled || _frustum.intersectsSprite( object ) ) {\n\n\t\t\t\t\tif ( sortObjects ) {\n\n\t\t\t\t\t\t_vector3.setFromMatrixPosition( object.matrixWorld )\n\t\t\t\t\t\t\t.applyMatrix4( _projScreenMatrix );\n\n\t\t\t\t\t}\n\n\t\t\t\t\tvar geometry = objects.update( object );\n\t\t\t\t\tvar material = object.material;\n\n\t\t\t\t\tif ( material.visible ) {\n\n\t\t\t\t\t\tcurrentRenderList.push( object, geometry, material, groupOrder, _vector3.z, null );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t} else if ( object.isImmediateRenderObject ) {\n\n\t\t\t\tif ( sortObjects ) {\n\n\t\t\t\t\t_vector3.setFromMatrixPosition( object.matrixWorld )\n\t\t\t\t\t\t.applyMatrix4( _projScreenMatrix );\n\n\t\t\t\t}\n\n\t\t\t\tcurrentRenderList.push( object, null, object.material, groupOrder, _vector3.z, null );\n\n\t\t\t} else if ( object.isMesh || object.isLine || object.isPoints ) {\n\n\t\t\t\tif ( object.isSkinnedMesh ) {\n\n\t\t\t\t\t// update skeleton only once in a frame\n\n\t\t\t\t\tif ( object.skeleton.frame !== info.render.frame ) {\n\n\t\t\t\t\t\tobject.skeleton.update();\n\t\t\t\t\t\tobject.skeleton.frame = info.render.frame;\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\tif ( ! object.frustumCulled || _frustum.intersectsObject( object ) ) {\n\n\t\t\t\t\tif ( sortObjects ) {\n\n\t\t\t\t\t\t_vector3.setFromMatrixPosition( object.matrixWorld )\n\t\t\t\t\t\t\t.applyMatrix4( _projScreenMatrix );\n\n\t\t\t\t\t}\n\n\t\t\t\t\tvar geometry = objects.update( object );\n\t\t\t\t\tvar material = object.material;\n\n\t\t\t\t\tif ( Array.isArray( material ) ) {\n\n\t\t\t\t\t\tvar groups = geometry.groups;\n\n\t\t\t\t\t\tfor ( var i = 0, l = groups.length; i < l; i ++ ) {\n\n\t\t\t\t\t\t\tvar group = groups[ i ];\n\t\t\t\t\t\t\tvar groupMaterial = material[ group.materialIndex ];\n\n\t\t\t\t\t\t\tif ( groupMaterial && groupMaterial.visible ) {\n\n\t\t\t\t\t\t\t\tcurrentRenderList.push( object, geometry, groupMaterial, groupOrder, _vector3.z, group );\n\n\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t} else if ( material.visible ) {\n\n\t\t\t\t\t\tcurrentRenderList.push( object, geometry, material, groupOrder, _vector3.z, null );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\tvar children = object.children;\n\n\t\tfor ( var i = 0, l = children.length; i < l; i ++ ) {\n\n\t\t\tprojectObject( children[ i ], camera, groupOrder, sortObjects );\n\n\t\t}\n\n\t}\n\n\tfunction renderObjects( renderList, scene, camera, overrideMaterial ) {\n\n\t\tfor ( var i = 0, l = renderList.length; i < l; i ++ ) {\n\n\t\t\tvar renderItem = renderList[ i ];\n\n\t\t\tvar object = renderItem.object;\n\t\t\tvar geometry = renderItem.geometry;\n\t\t\tvar material = overrideMaterial === undefined ? renderItem.material : overrideMaterial;\n\t\t\tvar group = renderItem.group;\n\n\t\t\tif ( camera.isArrayCamera ) {\n\n\t\t\t\t_currentArrayCamera = camera;\n\n\t\t\t\tvar cameras = camera.cameras;\n\n\t\t\t\tfor ( var j = 0, jl = cameras.length; j < jl; j ++ ) {\n\n\t\t\t\t\tvar camera2 = cameras[ j ];\n\n\t\t\t\t\tif ( object.layers.test( camera2.layers ) ) {\n\n\t\t\t\t\t\tstate.viewport( _currentViewport.copy( camera2.viewport ) );\n\n\t\t\t\t\t\tcurrentRenderState.setupLights( camera2 );\n\n\t\t\t\t\t\trenderObject( object, scene, camera2, geometry, material, group );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t} else {\n\n\t\t\t\t_currentArrayCamera = null;\n\n\t\t\t\trenderObject( object, scene, camera, geometry, material, group );\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\tfunction renderObject( object, scene, camera, geometry, material, group ) {\n\n\t\tobject.onBeforeRender( _this, scene, camera, geometry, material, group );\n\t\tcurrentRenderState = renderStates.get( scene, _currentArrayCamera || camera );\n\n\t\tobject.modelViewMatrix.multiplyMatrices( camera.matrixWorldInverse, object.matrixWorld );\n\t\tobject.normalMatrix.getNormalMatrix( object.modelViewMatrix );\n\n\t\tif ( object.isImmediateRenderObject ) {\n\n\t\t\tvar program = setProgram( camera, scene, material, object );\n\n\t\t\tstate.setMaterial( material );\n\n\t\t\t_currentGeometryProgram.geometry = null;\n\t\t\t_currentGeometryProgram.program = null;\n\t\t\t_currentGeometryProgram.wireframe = false;\n\n\t\t\trenderObjectImmediate( object, program );\n\n\t\t} else {\n\n\t\t\t_this.renderBufferDirect( camera, scene, geometry, material, object, group );\n\n\t\t}\n\n\t\tobject.onAfterRender( _this, scene, camera, geometry, material, group );\n\t\tcurrentRenderState = renderStates.get( scene, _currentArrayCamera || camera );\n\n\t}\n\n\tfunction initMaterial( material, scene, object ) {\n\n\t\tvar materialProperties = properties.get( material );\n\n\t\tvar lights = currentRenderState.state.lights;\n\t\tvar shadowsArray = currentRenderState.state.shadowsArray;\n\n\t\tvar lightsStateVersion = lights.state.version;\n\n\t\tvar parameters = programCache.getParameters( material, lights.state, shadowsArray, scene, _clipping.numPlanes, _clipping.numIntersection, object );\n\t\tvar programCacheKey = programCache.getProgramCacheKey( parameters );\n\n\t\tvar program = materialProperties.program;\n\t\tvar programChange = true;\n\n\t\tif ( program === undefined ) {\n\n\t\t\t// new material\n\t\t\tmaterial.addEventListener( 'dispose', onMaterialDispose );\n\n\t\t} else if ( program.cacheKey !== programCacheKey ) {\n\n\t\t\t// changed glsl or parameters\n\t\t\treleaseMaterialProgramReference( material );\n\n\t\t} else if ( materialProperties.lightsStateVersion !== lightsStateVersion ) {\n\n\t\t\tmaterialProperties.lightsStateVersion = lightsStateVersion;\n\n\t\t\tprogramChange = false;\n\n\t\t} else if ( parameters.shaderID !== undefined ) {\n\n\t\t\t// same glsl and uniform list\n\t\t\treturn;\n\n\t\t} else {\n\n\t\t\t// only rebuild uniform list\n\t\t\tprogramChange = false;\n\n\t\t}\n\n\t\tif ( programChange ) {\n\n\t\t\tprogram = programCache.acquireProgram( parameters, programCacheKey );\n\n\t\t\tmaterialProperties.program = program;\n\t\t\tmaterialProperties.uniforms = parameters.uniforms;\n\t\t\tmaterialProperties.environment = material.isMeshStandardMaterial ? scene.environment : null;\n\t\t\tmaterialProperties.outputEncoding = _this.outputEncoding;\n\t\t\tmaterial.program = program;\n\n\t\t}\n\n\t\tvar programAttributes = program.getAttributes();\n\n\t\tif ( material.morphTargets ) {\n\n\t\t\tmaterial.numSupportedMorphTargets = 0;\n\n\t\t\tfor ( var i = 0; i < _this.maxMorphTargets; i ++ ) {\n\n\t\t\t\tif ( programAttributes[ 'morphTarget' + i ] >= 0 ) {\n\n\t\t\t\t\tmaterial.numSupportedMorphTargets ++;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( material.morphNormals ) {\n\n\t\t\tmaterial.numSupportedMorphNormals = 0;\n\n\t\t\tfor ( var i = 0; i < _this.maxMorphNormals; i ++ ) {\n\n\t\t\t\tif ( programAttributes[ 'morphNormal' + i ] >= 0 ) {\n\n\t\t\t\t\tmaterial.numSupportedMorphNormals ++;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\tvar uniforms = materialProperties.uniforms;\n\n\t\tif ( ! material.isShaderMaterial &&\n\t\t\t! material.isRawShaderMaterial ||\n\t\t\tmaterial.clipping === true ) {\n\n\t\t\tmaterialProperties.numClippingPlanes = _clipping.numPlanes;\n\t\t\tmaterialProperties.numIntersection = _clipping.numIntersection;\n\t\t\tuniforms.clippingPlanes = _clipping.uniform;\n\n\t\t}\n\n\t\tmaterialProperties.fog = scene.fog;\n\n\t\t// store the light setup it was created for\n\n\t\tmaterialProperties.needsLights = materialNeedsLights( material );\n\t\tmaterialProperties.lightsStateVersion = lightsStateVersion;\n\n\t\tif ( materialProperties.needsLights ) {\n\n\t\t\t// wire up the material to this renderer's lighting state\n\n\t\t\tuniforms.ambientLightColor.value = lights.state.ambient;\n\t\t\tuniforms.lightProbe.value = lights.state.probe;\n\t\t\tuniforms.directionalLights.value = lights.state.directional;\n\t\t\tuniforms.directionalLightShadows.value = lights.state.directionalShadow;\n\t\t\tuniforms.spotLights.value = lights.state.spot;\n\t\t\tuniforms.spotLightShadows.value = lights.state.spotShadow;\n\t\t\tuniforms.rectAreaLights.value = lights.state.rectArea;\n\t\t\tuniforms.pointLights.value = lights.state.point;\n\t\t\tuniforms.pointLightShadows.value = lights.state.pointShadow;\n\t\t\tuniforms.hemisphereLights.value = lights.state.hemi;\n\n\t\t\tuniforms.directionalShadowMap.value = lights.state.directionalShadowMap;\n\t\t\tuniforms.directionalShadowMatrix.value = lights.state.directionalShadowMatrix;\n\t\t\tuniforms.spotShadowMap.value = lights.state.spotShadowMap;\n\t\t\tuniforms.spotShadowMatrix.value = lights.state.spotShadowMatrix;\n\t\t\tuniforms.pointShadowMap.value = lights.state.pointShadowMap;\n\t\t\tuniforms.pointShadowMatrix.value = lights.state.pointShadowMatrix;\n\t\t\t// TODO (abelnation): add area lights shadow info to uniforms\n\n\t\t}\n\n\t\tvar progUniforms = materialProperties.program.getUniforms(),\n\t\t\tuniformsList =\n\t\t\t\tWebGLUniforms.seqWithValue( progUniforms.seq, uniforms );\n\n\t\tmaterialProperties.uniformsList = uniformsList;\n\n\t}\n\n\tfunction setProgram( camera, scene, material, object ) {\n\n\t\ttextures.resetTextureUnits();\n\n\t\tvar fog = scene.fog;\n\t\tvar environment = material.isMeshStandardMaterial ? scene.environment : null;\n\n\t\tvar materialProperties = properties.get( material );\n\t\tvar lights = currentRenderState.state.lights;\n\n\t\tif ( _clippingEnabled ) {\n\n\t\t\tif ( _localClippingEnabled || camera !== _currentCamera ) {\n\n\t\t\t\tvar useCache =\n\t\t\t\t\tcamera === _currentCamera &&\n\t\t\t\t\tmaterial.id === _currentMaterialId;\n\n\t\t\t\t// we might want to call this function with some ClippingGroup\n\t\t\t\t// object instead of the material, once it becomes feasible\n\t\t\t\t// (#8465, #8379)\n\t\t\t\t_clipping.setState(\n\t\t\t\t\tmaterial.clippingPlanes, material.clipIntersection, material.clipShadows,\n\t\t\t\t\tcamera, materialProperties, useCache );\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( material.version === materialProperties.__version ) {\n\n\t\t\tif ( materialProperties.program === undefined ) {\n\n\t\t\t\tinitMaterial( material, scene, object );\n\n\t\t\t} else if ( material.fog && materialProperties.fog !== fog ) {\n\n\t\t\t\tinitMaterial( material, scene, object );\n\n\t\t\t} else if ( materialProperties.environment !== environment ) {\n\n\t\t\t\tinitMaterial( material, scene, object );\n\n\t\t\t} else if ( materialProperties.needsLights && ( materialProperties.lightsStateVersion !== lights.state.version ) ) {\n\n\t\t\t\tinitMaterial( material, scene, object );\n\n\t\t\t} else if ( materialProperties.numClippingPlanes !== undefined &&\n\t\t\t\t( materialProperties.numClippingPlanes !== _clipping.numPlanes ||\n\t\t\t\tmaterialProperties.numIntersection !== _clipping.numIntersection ) ) {\n\n\t\t\t\tinitMaterial( material, scene, object );\n\n\t\t\t} else if ( materialProperties.outputEncoding !== _this.outputEncoding ) {\n\n\t\t\t\tinitMaterial( material, scene, object );\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\tinitMaterial( material, scene, object );\n\t\t\tmaterialProperties.__version = material.version;\n\n\t\t}\n\n\t\tvar refreshProgram = false;\n\t\tvar refreshMaterial = false;\n\t\tvar refreshLights = false;\n\n\t\tvar program = materialProperties.program,\n\t\t\tp_uniforms = program.getUniforms(),\n\t\t\tm_uniforms = materialProperties.uniforms;\n\n\t\tif ( state.useProgram( program.program ) ) {\n\n\t\t\trefreshProgram = true;\n\t\t\trefreshMaterial = true;\n\t\t\trefreshLights = true;\n\n\t\t}\n\n\t\tif ( material.id !== _currentMaterialId ) {\n\n\t\t\t_currentMaterialId = material.id;\n\n\t\t\trefreshMaterial = true;\n\n\t\t}\n\n\t\tif ( refreshProgram || _currentCamera !== camera ) {\n\n\t\t\tp_uniforms.setValue( _gl, 'projectionMatrix', camera.projectionMatrix );\n\n\t\t\tif ( capabilities.logarithmicDepthBuffer ) {\n\n\t\t\t\tp_uniforms.setValue( _gl, 'logDepthBufFC',\n\t\t\t\t\t2.0 / ( Math.log( camera.far + 1.0 ) / Math.LN2 ) );\n\n\t\t\t}\n\n\t\t\tif ( _currentCamera !== camera ) {\n\n\t\t\t\t_currentCamera = camera;\n\n\t\t\t\t// lighting uniforms depend on the camera so enforce an update\n\t\t\t\t// now, in case this material supports lights - or later, when\n\t\t\t\t// the next material that does gets activated:\n\n\t\t\t\trefreshMaterial = true;\t\t// set to true on material change\n\t\t\t\trefreshLights = true;\t\t// remains set until update done\n\n\t\t\t}\n\n\t\t\t// load material specific uniforms\n\t\t\t// (shader material also gets them for the sake of genericity)\n\n\t\t\tif ( material.isShaderMaterial ||\n\t\t\t\tmaterial.isMeshPhongMaterial ||\n\t\t\t\tmaterial.isMeshToonMaterial ||\n\t\t\t\tmaterial.isMeshStandardMaterial ||\n\t\t\t\tmaterial.envMap ) {\n\n\t\t\t\tvar uCamPos = p_uniforms.map.cameraPosition;\n\n\t\t\t\tif ( uCamPos !== undefined ) {\n\n\t\t\t\t\tuCamPos.setValue( _gl,\n\t\t\t\t\t\t_vector3.setFromMatrixPosition( camera.matrixWorld ) );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tif ( material.isMeshPhongMaterial ||\n\t\t\t\tmaterial.isMeshToonMaterial ||\n\t\t\t\tmaterial.isMeshLambertMaterial ||\n\t\t\t\tmaterial.isMeshBasicMaterial ||\n\t\t\t\tmaterial.isMeshStandardMaterial ||\n\t\t\t\tmaterial.isShaderMaterial ) {\n\n\t\t\t\tp_uniforms.setValue( _gl, 'isOrthographic', camera.isOrthographicCamera === true );\n\n\t\t\t}\n\n\t\t\tif ( material.isMeshPhongMaterial ||\n\t\t\t\tmaterial.isMeshToonMaterial ||\n\t\t\t\tmaterial.isMeshLambertMaterial ||\n\t\t\t\tmaterial.isMeshBasicMaterial ||\n\t\t\t\tmaterial.isMeshStandardMaterial ||\n\t\t\t\tmaterial.isShaderMaterial ||\n\t\t\t\tmaterial.skinning ) {\n\n\t\t\t\tp_uniforms.setValue( _gl, 'viewMatrix', camera.matrixWorldInverse );\n\n\t\t\t}\n\n\t\t}\n\n\t\t// skinning uniforms must be set even if material didn't change\n\t\t// auto-setting of texture unit for bone texture must go before other textures\n\t\t// otherwise textures used for skinning can take over texture units reserved for other material textures\n\n\t\tif ( material.skinning ) {\n\n\t\t\tp_uniforms.setOptional( _gl, object, 'bindMatrix' );\n\t\t\tp_uniforms.setOptional( _gl, object, 'bindMatrixInverse' );\n\n\t\t\tvar skeleton = object.skeleton;\n\n\t\t\tif ( skeleton ) {\n\n\t\t\t\tvar bones = skeleton.bones;\n\n\t\t\t\tif ( capabilities.floatVertexTextures ) {\n\n\t\t\t\t\tif ( skeleton.boneTexture === undefined ) {\n\n\t\t\t\t\t\t// layout (1 matrix = 4 pixels)\n\t\t\t\t\t\t//      RGBA RGBA RGBA RGBA (=> column1, column2, column3, column4)\n\t\t\t\t\t\t//  with  8x8  pixel texture max   16 bones * 4 pixels =  (8 * 8)\n\t\t\t\t\t\t//       16x16 pixel texture max   64 bones * 4 pixels = (16 * 16)\n\t\t\t\t\t\t//       32x32 pixel texture max  256 bones * 4 pixels = (32 * 32)\n\t\t\t\t\t\t//       64x64 pixel texture max 1024 bones * 4 pixels = (64 * 64)\n\n\n\t\t\t\t\t\tvar size = Math.sqrt( bones.length * 4 ); // 4 pixels needed for 1 matrix\n\t\t\t\t\t\tsize = MathUtils.ceilPowerOfTwo( size );\n\t\t\t\t\t\tsize = Math.max( size, 4 );\n\n\t\t\t\t\t\tvar boneMatrices = new Float32Array( size * size * 4 ); // 4 floats per RGBA pixel\n\t\t\t\t\t\tboneMatrices.set( skeleton.boneMatrices ); // copy current values\n\n\t\t\t\t\t\tvar boneTexture = new DataTexture( boneMatrices, size, size, RGBAFormat, FloatType );\n\n\t\t\t\t\t\tskeleton.boneMatrices = boneMatrices;\n\t\t\t\t\t\tskeleton.boneTexture = boneTexture;\n\t\t\t\t\t\tskeleton.boneTextureSize = size;\n\n\t\t\t\t\t}\n\n\t\t\t\t\tp_uniforms.setValue( _gl, 'boneTexture', skeleton.boneTexture, textures );\n\t\t\t\t\tp_uniforms.setValue( _gl, 'boneTextureSize', skeleton.boneTextureSize );\n\n\t\t\t\t} else {\n\n\t\t\t\t\tp_uniforms.setOptional( _gl, skeleton, 'boneMatrices' );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( refreshMaterial || materialProperties.receiveShadow !== object.receiveShadow ) {\n\n\t\t\tmaterialProperties.receiveShadow = object.receiveShadow;\n\t\t\tp_uniforms.setValue( _gl, 'receiveShadow', object.receiveShadow );\n\n\t\t}\n\n\t\tif ( refreshMaterial ) {\n\n\t\t\tp_uniforms.setValue( _gl, 'toneMappingExposure', _this.toneMappingExposure );\n\t\t\tp_uniforms.setValue( _gl, 'toneMappingWhitePoint', _this.toneMappingWhitePoint );\n\n\t\t\tif ( materialProperties.needsLights ) {\n\n\t\t\t\t// the current material requires lighting info\n\n\t\t\t\t// note: all lighting uniforms are always set correctly\n\t\t\t\t// they simply reference the renderer's state for their\n\t\t\t\t// values\n\t\t\t\t//\n\t\t\t\t// use the current material's .needsUpdate flags to set\n\t\t\t\t// the GL state when required\n\n\t\t\t\tmarkUniformsLightsNeedsUpdate( m_uniforms, refreshLights );\n\n\t\t\t}\n\n\t\t\t// refresh uniforms common to several materials\n\n\t\t\tif ( fog && material.fog ) {\n\n\t\t\t\trefreshUniformsFog( m_uniforms, fog );\n\n\t\t\t}\n\n\t\t\tif ( material.isMeshBasicMaterial ) {\n\n\t\t\t\trefreshUniformsCommon( m_uniforms, material );\n\n\t\t\t} else if ( material.isMeshLambertMaterial ) {\n\n\t\t\t\trefreshUniformsCommon( m_uniforms, material );\n\t\t\t\trefreshUniformsLambert( m_uniforms, material );\n\n\t\t\t} else if ( material.isMeshToonMaterial ) {\n\n\t\t\t\trefreshUniformsCommon( m_uniforms, material );\n\t\t\t\trefreshUniformsToon( m_uniforms, material );\n\n\t\t\t} else if ( material.isMeshPhongMaterial ) {\n\n\t\t\t\trefreshUniformsCommon( m_uniforms, material );\n\t\t\t\trefreshUniformsPhong( m_uniforms, material );\n\n\t\t\t} else if ( material.isMeshStandardMaterial ) {\n\n\t\t\t\trefreshUniformsCommon( m_uniforms, material, environment );\n\n\t\t\t\tif ( material.isMeshPhysicalMaterial ) {\n\n\t\t\t\t\trefreshUniformsPhysical( m_uniforms, material, environment );\n\n\t\t\t\t} else {\n\n\t\t\t\t\trefreshUniformsStandard( m_uniforms, material, environment );\n\n\t\t\t\t}\n\n\t\t\t} else if ( material.isMeshMatcapMaterial ) {\n\n\t\t\t\trefreshUniformsCommon( m_uniforms, material );\n\t\t\t\trefreshUniformsMatcap( m_uniforms, material );\n\n\t\t\t} else if ( material.isMeshDepthMaterial ) {\n\n\t\t\t\trefreshUniformsCommon( m_uniforms, material );\n\t\t\t\trefreshUniformsDepth( m_uniforms, material );\n\n\t\t\t} else if ( material.isMeshDistanceMaterial ) {\n\n\t\t\t\trefreshUniformsCommon( m_uniforms, material );\n\t\t\t\trefreshUniformsDistance( m_uniforms, material );\n\n\t\t\t} else if ( material.isMeshNormalMaterial ) {\n\n\t\t\t\trefreshUniformsCommon( m_uniforms, material );\n\t\t\t\trefreshUniformsNormal( m_uniforms, material );\n\n\t\t\t} else if ( material.isLineBasicMaterial ) {\n\n\t\t\t\trefreshUniformsLine( m_uniforms, material );\n\n\t\t\t\tif ( material.isLineDashedMaterial ) {\n\n\t\t\t\t\trefreshUniformsDash( m_uniforms, material );\n\n\t\t\t\t}\n\n\t\t\t} else if ( material.isPointsMaterial ) {\n\n\t\t\t\trefreshUniformsPoints( m_uniforms, material );\n\n\t\t\t} else if ( material.isSpriteMaterial ) {\n\n\t\t\t\trefreshUniformsSprites( m_uniforms, material );\n\n\t\t\t} else if ( material.isShadowMaterial ) {\n\n\t\t\t\tm_uniforms.color.value.copy( material.color );\n\t\t\t\tm_uniforms.opacity.value = material.opacity;\n\n\t\t\t}\n\n\t\t\t// RectAreaLight Texture\n\t\t\t// TODO (mrdoob): Find a nicer implementation\n\n\t\t\tif ( m_uniforms.ltc_1 !== undefined ) m_uniforms.ltc_1.value = UniformsLib.LTC_1;\n\t\t\tif ( m_uniforms.ltc_2 !== undefined ) m_uniforms.ltc_2.value = UniformsLib.LTC_2;\n\n\t\t\tWebGLUniforms.upload( _gl, materialProperties.uniformsList, m_uniforms, textures );\n\n\t\t\tif ( material.isShaderMaterial ) {\n\n\t\t\t\tmaterial.uniformsNeedUpdate = false; // #15581\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( material.isShaderMaterial && material.uniformsNeedUpdate === true ) {\n\n\t\t\tWebGLUniforms.upload( _gl, materialProperties.uniformsList, m_uniforms, textures );\n\t\t\tmaterial.uniformsNeedUpdate = false;\n\n\t\t}\n\n\t\tif ( material.isSpriteMaterial ) {\n\n\t\t\tp_uniforms.setValue( _gl, 'center', object.center );\n\n\t\t}\n\n\t\t// common matrices\n\n\t\tp_uniforms.setValue( _gl, 'modelViewMatrix', object.modelViewMatrix );\n\t\tp_uniforms.setValue( _gl, 'normalMatrix', object.normalMatrix );\n\t\tp_uniforms.setValue( _gl, 'modelMatrix', object.matrixWorld );\n\n\t\treturn program;\n\n\t}\n\n\t// Uniforms (refresh uniforms objects)\n\n\tfunction refreshUniformsCommon( uniforms, material, environment ) {\n\n\t\tuniforms.opacity.value = material.opacity;\n\n\t\tif ( material.color ) {\n\n\t\t\tuniforms.diffuse.value.copy( material.color );\n\n\t\t}\n\n\t\tif ( material.emissive ) {\n\n\t\t\tuniforms.emissive.value.copy( material.emissive ).multiplyScalar( material.emissiveIntensity );\n\n\t\t}\n\n\t\tif ( material.map ) {\n\n\t\t\tuniforms.map.value = material.map;\n\n\t\t}\n\n\t\tif ( material.alphaMap ) {\n\n\t\t\tuniforms.alphaMap.value = material.alphaMap;\n\n\t\t}\n\n\t\tif ( material.specularMap ) {\n\n\t\t\tuniforms.specularMap.value = material.specularMap;\n\n\t\t}\n\n\t\tvar envMap = material.envMap || environment;\n\n\t\tif ( envMap ) {\n\n\t\t\tuniforms.envMap.value = envMap;\n\n\t\t\tuniforms.flipEnvMap.value = envMap.isCubeTexture ? - 1 : 1;\n\n\t\t\tuniforms.reflectivity.value = material.reflectivity;\n\t\t\tuniforms.refractionRatio.value = material.refractionRatio;\n\n\t\t\tuniforms.maxMipLevel.value = properties.get( envMap ).__maxMipLevel;\n\n\t\t}\n\n\t\tif ( material.lightMap ) {\n\n\t\t\tuniforms.lightMap.value = material.lightMap;\n\t\t\tuniforms.lightMapIntensity.value = material.lightMapIntensity;\n\n\t\t}\n\n\t\tif ( material.aoMap ) {\n\n\t\t\tuniforms.aoMap.value = material.aoMap;\n\t\t\tuniforms.aoMapIntensity.value = material.aoMapIntensity;\n\n\t\t}\n\n\t\t// uv repeat and offset setting priorities\n\t\t// 1. color map\n\t\t// 2. specular map\n\t\t// 3. normal map\n\t\t// 4. bump map\n\t\t// 5. alpha map\n\t\t// 6. emissive map\n\n\t\tvar uvScaleMap;\n\n\t\tif ( material.map ) {\n\n\t\t\tuvScaleMap = material.map;\n\n\t\t} else if ( material.specularMap ) {\n\n\t\t\tuvScaleMap = material.specularMap;\n\n\t\t} else if ( material.displacementMap ) {\n\n\t\t\tuvScaleMap = material.displacementMap;\n\n\t\t} else if ( material.normalMap ) {\n\n\t\t\tuvScaleMap = material.normalMap;\n\n\t\t} else if ( material.bumpMap ) {\n\n\t\t\tuvScaleMap = material.bumpMap;\n\n\t\t} else if ( material.roughnessMap ) {\n\n\t\t\tuvScaleMap = material.roughnessMap;\n\n\t\t} else if ( material.metalnessMap ) {\n\n\t\t\tuvScaleMap = material.metalnessMap;\n\n\t\t} else if ( material.alphaMap ) {\n\n\t\t\tuvScaleMap = material.alphaMap;\n\n\t\t} else if ( material.emissiveMap ) {\n\n\t\t\tuvScaleMap = material.emissiveMap;\n\n\t\t}\n\n\t\tif ( uvScaleMap !== undefined ) {\n\n\t\t\t// backwards compatibility\n\t\t\tif ( uvScaleMap.isWebGLRenderTarget ) {\n\n\t\t\t\tuvScaleMap = uvScaleMap.texture;\n\n\t\t\t}\n\n\t\t\tif ( uvScaleMap.matrixAutoUpdate === true ) {\n\n\t\t\t\tuvScaleMap.updateMatrix();\n\n\t\t\t}\n\n\t\t\tuniforms.uvTransform.value.copy( uvScaleMap.matrix );\n\n\t\t}\n\n\t\t// uv repeat and offset setting priorities for uv2\n\t\t// 1. ao map\n\t\t// 2. light map\n\n\t\tvar uv2ScaleMap;\n\n\t\tif ( material.aoMap ) {\n\n\t\t\tuv2ScaleMap = material.aoMap;\n\n\t\t} else if ( material.lightMap ) {\n\n\t\t\tuv2ScaleMap = material.lightMap;\n\n\t\t}\n\n\t\tif ( uv2ScaleMap !== undefined ) {\n\n\t\t\t// backwards compatibility\n\t\t\tif ( uv2ScaleMap.isWebGLRenderTarget ) {\n\n\t\t\t\tuv2ScaleMap = uv2ScaleMap.texture;\n\n\t\t\t}\n\n\t\t\tif ( uv2ScaleMap.matrixAutoUpdate === true ) {\n\n\t\t\t\tuv2ScaleMap.updateMatrix();\n\n\t\t\t}\n\n\t\t\tuniforms.uv2Transform.value.copy( uv2ScaleMap.matrix );\n\n\t\t}\n\n\t}\n\n\tfunction refreshUniformsLine( uniforms, material ) {\n\n\t\tuniforms.diffuse.value.copy( material.color );\n\t\tuniforms.opacity.value = material.opacity;\n\n\t}\n\n\tfunction refreshUniformsDash( uniforms, material ) {\n\n\t\tuniforms.dashSize.value = material.dashSize;\n\t\tuniforms.totalSize.value = material.dashSize + material.gapSize;\n\t\tuniforms.scale.value = material.scale;\n\n\t}\n\n\tfunction refreshUniformsPoints( uniforms, material ) {\n\n\t\tuniforms.diffuse.value.copy( material.color );\n\t\tuniforms.opacity.value = material.opacity;\n\t\tuniforms.size.value = material.size * _pixelRatio;\n\t\tuniforms.scale.value = _height * 0.5;\n\n\t\tif ( material.map ) {\n\n\t\t\tuniforms.map.value = material.map;\n\n\t\t}\n\n\t\tif ( material.alphaMap ) {\n\n\t\t\tuniforms.alphaMap.value = material.alphaMap;\n\n\t\t}\n\n\t\t// uv repeat and offset setting priorities\n\t\t// 1. color map\n\t\t// 2. alpha map\n\n\t\tvar uvScaleMap;\n\n\t\tif ( material.map ) {\n\n\t\t\tuvScaleMap = material.map;\n\n\t\t} else if ( material.alphaMap ) {\n\n\t\t\tuvScaleMap = material.alphaMap;\n\n\t\t}\n\n\t\tif ( uvScaleMap !== undefined ) {\n\n\t\t\tif ( uvScaleMap.matrixAutoUpdate === true ) {\n\n\t\t\t\tuvScaleMap.updateMatrix();\n\n\t\t\t}\n\n\t\t\tuniforms.uvTransform.value.copy( uvScaleMap.matrix );\n\n\t\t}\n\n\t}\n\n\tfunction refreshUniformsSprites( uniforms, material ) {\n\n\t\tuniforms.diffuse.value.copy( material.color );\n\t\tuniforms.opacity.value = material.opacity;\n\t\tuniforms.rotation.value = material.rotation;\n\n\t\tif ( material.map ) {\n\n\t\t\tuniforms.map.value = material.map;\n\n\t\t}\n\n\t\tif ( material.alphaMap ) {\n\n\t\t\tuniforms.alphaMap.value = material.alphaMap;\n\n\t\t}\n\n\t\t// uv repeat and offset setting priorities\n\t\t// 1. color map\n\t\t// 2. alpha map\n\n\t\tvar uvScaleMap;\n\n\t\tif ( material.map ) {\n\n\t\t\tuvScaleMap = material.map;\n\n\t\t} else if ( material.alphaMap ) {\n\n\t\t\tuvScaleMap = material.alphaMap;\n\n\t\t}\n\n\t\tif ( uvScaleMap !== undefined ) {\n\n\t\t\tif ( uvScaleMap.matrixAutoUpdate === true ) {\n\n\t\t\t\tuvScaleMap.updateMatrix();\n\n\t\t\t}\n\n\t\t\tuniforms.uvTransform.value.copy( uvScaleMap.matrix );\n\n\t\t}\n\n\t}\n\n\tfunction refreshUniformsFog( uniforms, fog ) {\n\n\t\tuniforms.fogColor.value.copy( fog.color );\n\n\t\tif ( fog.isFog ) {\n\n\t\t\tuniforms.fogNear.value = fog.near;\n\t\t\tuniforms.fogFar.value = fog.far;\n\n\t\t} else if ( fog.isFogExp2 ) {\n\n\t\t\tuniforms.fogDensity.value = fog.density;\n\n\t\t}\n\n\t}\n\n\tfunction refreshUniformsLambert( uniforms, material ) {\n\n\t\tif ( material.emissiveMap ) {\n\n\t\t\tuniforms.emissiveMap.value = material.emissiveMap;\n\n\t\t}\n\n\t}\n\n\tfunction refreshUniformsPhong( uniforms, material ) {\n\n\t\tuniforms.specular.value.copy( material.specular );\n\t\tuniforms.shininess.value = Math.max( material.shininess, 1e-4 ); // to prevent pow( 0.0, 0.0 )\n\n\t\tif ( material.emissiveMap ) {\n\n\t\t\tuniforms.emissiveMap.value = material.emissiveMap;\n\n\t\t}\n\n\t\tif ( material.bumpMap ) {\n\n\t\t\tuniforms.bumpMap.value = material.bumpMap;\n\t\t\tuniforms.bumpScale.value = material.bumpScale;\n\t\t\tif ( material.side === BackSide ) uniforms.bumpScale.value *= - 1;\n\n\t\t}\n\n\t\tif ( material.normalMap ) {\n\n\t\t\tuniforms.normalMap.value = material.normalMap;\n\t\t\tuniforms.normalScale.value.copy( material.normalScale );\n\t\t\tif ( material.side === BackSide ) uniforms.normalScale.value.negate();\n\n\t\t}\n\n\t\tif ( material.displacementMap ) {\n\n\t\t\tuniforms.displacementMap.value = material.displacementMap;\n\t\t\tuniforms.displacementScale.value = material.displacementScale;\n\t\t\tuniforms.displacementBias.value = material.displacementBias;\n\n\t\t}\n\n\t}\n\n\tfunction refreshUniformsToon( uniforms, material ) {\n\n\t\tuniforms.specular.value.copy( material.specular );\n\t\tuniforms.shininess.value = Math.max( material.shininess, 1e-4 ); // to prevent pow( 0.0, 0.0 )\n\n\t\tif ( material.gradientMap ) {\n\n\t\t\tuniforms.gradientMap.value = material.gradientMap;\n\n\t\t}\n\n\t\tif ( material.emissiveMap ) {\n\n\t\t\tuniforms.emissiveMap.value = material.emissiveMap;\n\n\t\t}\n\n\t\tif ( material.bumpMap ) {\n\n\t\t\tuniforms.bumpMap.value = material.bumpMap;\n\t\t\tuniforms.bumpScale.value = material.bumpScale;\n\t\t\tif ( material.side === BackSide ) uniforms.bumpScale.value *= - 1;\n\n\t\t}\n\n\t\tif ( material.normalMap ) {\n\n\t\t\tuniforms.normalMap.value = material.normalMap;\n\t\t\tuniforms.normalScale.value.copy( material.normalScale );\n\t\t\tif ( material.side === BackSide ) uniforms.normalScale.value.negate();\n\n\t\t}\n\n\t\tif ( material.displacementMap ) {\n\n\t\t\tuniforms.displacementMap.value = material.displacementMap;\n\t\t\tuniforms.displacementScale.value = material.displacementScale;\n\t\t\tuniforms.displacementBias.value = material.displacementBias;\n\n\t\t}\n\n\t}\n\n\tfunction refreshUniformsStandard( uniforms, material, environment ) {\n\n\t\tuniforms.roughness.value = material.roughness;\n\t\tuniforms.metalness.value = material.metalness;\n\n\t\tif ( material.roughnessMap ) {\n\n\t\t\tuniforms.roughnessMap.value = material.roughnessMap;\n\n\t\t}\n\n\t\tif ( material.metalnessMap ) {\n\n\t\t\tuniforms.metalnessMap.value = material.metalnessMap;\n\n\t\t}\n\n\t\tif ( material.emissiveMap ) {\n\n\t\t\tuniforms.emissiveMap.value = material.emissiveMap;\n\n\t\t}\n\n\t\tif ( material.bumpMap ) {\n\n\t\t\tuniforms.bumpMap.value = material.bumpMap;\n\t\t\tuniforms.bumpScale.value = material.bumpScale;\n\t\t\tif ( material.side === BackSide ) uniforms.bumpScale.value *= - 1;\n\n\t\t}\n\n\t\tif ( material.normalMap ) {\n\n\t\t\tuniforms.normalMap.value = material.normalMap;\n\t\t\tuniforms.normalScale.value.copy( material.normalScale );\n\t\t\tif ( material.side === BackSide ) uniforms.normalScale.value.negate();\n\n\t\t}\n\n\t\tif ( material.displacementMap ) {\n\n\t\t\tuniforms.displacementMap.value = material.displacementMap;\n\t\t\tuniforms.displacementScale.value = material.displacementScale;\n\t\t\tuniforms.displacementBias.value = material.displacementBias;\n\n\t\t}\n\n\t\tif ( material.envMap || environment ) {\n\n\t\t\t//uniforms.envMap.value = material.envMap; // part of uniforms common\n\t\t\tuniforms.envMapIntensity.value = material.envMapIntensity;\n\n\t\t}\n\n\t}\n\n\tfunction refreshUniformsPhysical( uniforms, material, environment ) {\n\n\t\trefreshUniformsStandard( uniforms, material, environment );\n\n\t\tuniforms.reflectivity.value = material.reflectivity; // also part of uniforms common\n\n\t\tuniforms.clearcoat.value = material.clearcoat;\n\t\tuniforms.clearcoatRoughness.value = material.clearcoatRoughness;\n\t\tif ( material.sheen ) uniforms.sheen.value.copy( material.sheen );\n\n\t\tif ( material.clearcoatNormalMap ) {\n\n\t\t\tuniforms.clearcoatNormalScale.value.copy( material.clearcoatNormalScale );\n\t\t\tuniforms.clearcoatNormalMap.value = material.clearcoatNormalMap;\n\n\t\t\tif ( material.side === BackSide ) {\n\n\t\t\t\tuniforms.clearcoatNormalScale.value.negate();\n\n\t\t\t}\n\n\t\t}\n\n\t\tuniforms.transparency.value = material.transparency;\n\n\t}\n\n\tfunction refreshUniformsMatcap( uniforms, material ) {\n\n\t\tif ( material.matcap ) {\n\n\t\t\tuniforms.matcap.value = material.matcap;\n\n\t\t}\n\n\t\tif ( material.bumpMap ) {\n\n\t\t\tuniforms.bumpMap.value = material.bumpMap;\n\t\t\tuniforms.bumpScale.value = material.bumpScale;\n\t\t\tif ( material.side === BackSide ) uniforms.bumpScale.value *= - 1;\n\n\t\t}\n\n\t\tif ( material.normalMap ) {\n\n\t\t\tuniforms.normalMap.value = material.normalMap;\n\t\t\tuniforms.normalScale.value.copy( material.normalScale );\n\t\t\tif ( material.side === BackSide ) uniforms.normalScale.value.negate();\n\n\t\t}\n\n\t\tif ( material.displacementMap ) {\n\n\t\t\tuniforms.displacementMap.value = material.displacementMap;\n\t\t\tuniforms.displacementScale.value = material.displacementScale;\n\t\t\tuniforms.displacementBias.value = material.displacementBias;\n\n\t\t}\n\n\t}\n\n\tfunction refreshUniformsDepth( uniforms, material ) {\n\n\t\tif ( material.displacementMap ) {\n\n\t\t\tuniforms.displacementMap.value = material.displacementMap;\n\t\t\tuniforms.displacementScale.value = material.displacementScale;\n\t\t\tuniforms.displacementBias.value = material.displacementBias;\n\n\t\t}\n\n\t}\n\n\tfunction refreshUniformsDistance( uniforms, material ) {\n\n\t\tif ( material.displacementMap ) {\n\n\t\t\tuniforms.displacementMap.value = material.displacementMap;\n\t\t\tuniforms.displacementScale.value = material.displacementScale;\n\t\t\tuniforms.displacementBias.value = material.displacementBias;\n\n\t\t}\n\n\t\tuniforms.referencePosition.value.copy( material.referencePosition );\n\t\tuniforms.nearDistance.value = material.nearDistance;\n\t\tuniforms.farDistance.value = material.farDistance;\n\n\t}\n\n\tfunction refreshUniformsNormal( uniforms, material ) {\n\n\t\tif ( material.bumpMap ) {\n\n\t\t\tuniforms.bumpMap.value = material.bumpMap;\n\t\t\tuniforms.bumpScale.value = material.bumpScale;\n\t\t\tif ( material.side === BackSide ) uniforms.bumpScale.value *= - 1;\n\n\t\t}\n\n\t\tif ( material.normalMap ) {\n\n\t\t\tuniforms.normalMap.value = material.normalMap;\n\t\t\tuniforms.normalScale.value.copy( material.normalScale );\n\t\t\tif ( material.side === BackSide ) uniforms.normalScale.value.negate();\n\n\t\t}\n\n\t\tif ( material.displacementMap ) {\n\n\t\t\tuniforms.displacementMap.value = material.displacementMap;\n\t\t\tuniforms.displacementScale.value = material.displacementScale;\n\t\t\tuniforms.displacementBias.value = material.displacementBias;\n\n\t\t}\n\n\t}\n\n\t// If uniforms are marked as clean, they don't need to be loaded to the GPU.\n\n\tfunction markUniformsLightsNeedsUpdate( uniforms, value ) {\n\n\t\tuniforms.ambientLightColor.needsUpdate = value;\n\t\tuniforms.lightProbe.needsUpdate = value;\n\n\t\tuniforms.directionalLights.needsUpdate = value;\n\t\tuniforms.directionalLightShadows.needsUpdate = value;\n\t\tuniforms.pointLights.needsUpdate = value;\n\t\tuniforms.pointLightShadows.needsUpdate = value;\n\t\tuniforms.spotLights.needsUpdate = value;\n\t\tuniforms.spotLightShadows.needsUpdate = value;\n\t\tuniforms.rectAreaLights.needsUpdate = value;\n\t\tuniforms.hemisphereLights.needsUpdate = value;\n\n\t}\n\n\tfunction materialNeedsLights( material ) {\n\n\t\treturn material.isMeshLambertMaterial || material.isMeshToonMaterial || material.isMeshPhongMaterial ||\n\t\t\tmaterial.isMeshStandardMaterial || material.isShadowMaterial ||\n\t\t\t( material.isShaderMaterial && material.lights === true );\n\n\t}\n\n\t//\n\tthis.setFramebuffer = function ( value ) {\n\n\t\tif ( _framebuffer !== value && _currentRenderTarget === null ) _gl.bindFramebuffer( 36160, value );\n\n\t\t_framebuffer = value;\n\n\t};\n\n\tthis.getActiveCubeFace = function () {\n\n\t\treturn _currentActiveCubeFace;\n\n\t};\n\n\tthis.getActiveMipmapLevel = function () {\n\n\t\treturn _currentActiveMipmapLevel;\n\n\t};\n\n\tthis.getRenderTarget = function () {\n\n\t\treturn _currentRenderTarget;\n\n\t};\n\n\tthis.setRenderTarget = function ( renderTarget, activeCubeFace, activeMipmapLevel ) {\n\n\t\t_currentRenderTarget = renderTarget;\n\t\t_currentActiveCubeFace = activeCubeFace;\n\t\t_currentActiveMipmapLevel = activeMipmapLevel;\n\n\t\tif ( renderTarget && properties.get( renderTarget ).__webglFramebuffer === undefined ) {\n\n\t\t\ttextures.setupRenderTarget( renderTarget );\n\n\t\t}\n\n\t\tvar framebuffer = _framebuffer;\n\t\tvar isCube = false;\n\n\t\tif ( renderTarget ) {\n\n\t\t\tvar __webglFramebuffer = properties.get( renderTarget ).__webglFramebuffer;\n\n\t\t\tif ( renderTarget.isWebGLCubeRenderTarget ) {\n\n\t\t\t\tframebuffer = __webglFramebuffer[ activeCubeFace || 0 ];\n\t\t\t\tisCube = true;\n\n\t\t\t} else if ( renderTarget.isWebGLMultisampleRenderTarget ) {\n\n\t\t\t\tframebuffer = properties.get( renderTarget ).__webglMultisampledFramebuffer;\n\n\t\t\t} else {\n\n\t\t\t\tframebuffer = __webglFramebuffer;\n\n\t\t\t}\n\n\t\t\t_currentViewport.copy( renderTarget.viewport );\n\t\t\t_currentScissor.copy( renderTarget.scissor );\n\t\t\t_currentScissorTest = renderTarget.scissorTest;\n\n\t\t} else {\n\n\t\t\t_currentViewport.copy( _viewport ).multiplyScalar( _pixelRatio ).floor();\n\t\t\t_currentScissor.copy( _scissor ).multiplyScalar( _pixelRatio ).floor();\n\t\t\t_currentScissorTest = _scissorTest;\n\n\t\t}\n\n\t\tif ( _currentFramebuffer !== framebuffer ) {\n\n\t\t\t_gl.bindFramebuffer( 36160, framebuffer );\n\t\t\t_currentFramebuffer = framebuffer;\n\n\t\t}\n\n\t\tstate.viewport( _currentViewport );\n\t\tstate.scissor( _currentScissor );\n\t\tstate.setScissorTest( _currentScissorTest );\n\n\t\tif ( isCube ) {\n\n\t\t\tvar textureProperties = properties.get( renderTarget.texture );\n\t\t\t_gl.framebufferTexture2D( 36160, 36064, 34069 + ( activeCubeFace || 0 ), textureProperties.__webglTexture, activeMipmapLevel || 0 );\n\n\t\t}\n\n\t};\n\n\tthis.readRenderTargetPixels = function ( renderTarget, x, y, width, height, buffer, activeCubeFaceIndex ) {\n\n\t\tif ( ! ( renderTarget && renderTarget.isWebGLRenderTarget ) ) {\n\n\t\t\tconsole.error( 'THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not THREE.WebGLRenderTarget.' );\n\t\t\treturn;\n\n\t\t}\n\n\t\tvar framebuffer = properties.get( renderTarget ).__webglFramebuffer;\n\n\t\tif ( renderTarget.isWebGLCubeRenderTarget && activeCubeFaceIndex !== undefined ) {\n\n\t\t\tframebuffer = framebuffer[ activeCubeFaceIndex ];\n\n\t\t}\n\n\t\tif ( framebuffer ) {\n\n\t\t\tvar restore = false;\n\n\t\t\tif ( framebuffer !== _currentFramebuffer ) {\n\n\t\t\t\t_gl.bindFramebuffer( 36160, framebuffer );\n\n\t\t\t\trestore = true;\n\n\t\t\t}\n\n\t\t\ttry {\n\n\t\t\t\tvar texture = renderTarget.texture;\n\t\t\t\tvar textureFormat = texture.format;\n\t\t\t\tvar textureType = texture.type;\n\n\t\t\t\tif ( textureFormat !== RGBAFormat && utils.convert( textureFormat ) !== _gl.getParameter( 35739 ) ) {\n\n\t\t\t\t\tconsole.error( 'THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not in RGBA or implementation defined format.' );\n\t\t\t\t\treturn;\n\n\t\t\t\t}\n\n\t\t\t\tif ( textureType !== UnsignedByteType && utils.convert( textureType ) !== _gl.getParameter( 35738 ) && // IE11, Edge and Chrome Mac < 52 (#9513)\n\t\t\t\t\t! ( textureType === FloatType && ( capabilities.isWebGL2 || extensions.get( 'OES_texture_float' ) || extensions.get( 'WEBGL_color_buffer_float' ) ) ) && // Chrome Mac >= 52 and Firefox\n\t\t\t\t\t! ( textureType === HalfFloatType && ( capabilities.isWebGL2 ? extensions.get( 'EXT_color_buffer_float' ) : extensions.get( 'EXT_color_buffer_half_float' ) ) ) ) {\n\n\t\t\t\t\tconsole.error( 'THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not in UnsignedByteType or implementation defined type.' );\n\t\t\t\t\treturn;\n\n\t\t\t\t}\n\n\t\t\t\tif ( _gl.checkFramebufferStatus( 36160 ) === 36053 ) {\n\n\t\t\t\t\t// the following if statement ensures valid read requests (no out-of-bounds pixels, see #8604)\n\n\t\t\t\t\tif ( ( x >= 0 && x <= ( renderTarget.width - width ) ) && ( y >= 0 && y <= ( renderTarget.height - height ) ) ) {\n\n\t\t\t\t\t\t_gl.readPixels( x, y, width, height, utils.convert( textureFormat ), utils.convert( textureType ), buffer );\n\n\t\t\t\t\t}\n\n\t\t\t\t} else {\n\n\t\t\t\t\tconsole.error( 'THREE.WebGLRenderer.readRenderTargetPixels: readPixels from renderTarget failed. Framebuffer not complete.' );\n\n\t\t\t\t}\n\n\t\t\t} finally {\n\n\t\t\t\tif ( restore ) {\n\n\t\t\t\t\t_gl.bindFramebuffer( 36160, _currentFramebuffer );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t};\n\n\tthis.copyFramebufferToTexture = function ( position, texture, level ) {\n\n\t\tif ( level === undefined ) level = 0;\n\n\t\tvar levelScale = Math.pow( 2, - level );\n\t\tvar width = Math.floor( texture.image.width * levelScale );\n\t\tvar height = Math.floor( texture.image.height * levelScale );\n\t\tvar glFormat = utils.convert( texture.format );\n\n\t\ttextures.setTexture2D( texture, 0 );\n\n\t\t_gl.copyTexImage2D( 3553, level, glFormat, position.x, position.y, width, height, 0 );\n\n\t\tstate.unbindTexture();\n\n\t};\n\n\tthis.copyTextureToTexture = function ( position, srcTexture, dstTexture, level ) {\n\n\t\tvar width = srcTexture.image.width;\n\t\tvar height = srcTexture.image.height;\n\t\tvar glFormat = utils.convert( dstTexture.format );\n\t\tvar glType = utils.convert( dstTexture.type );\n\n\t\ttextures.setTexture2D( dstTexture, 0 );\n\n\t\tif ( srcTexture.isDataTexture ) {\n\n\t\t\t_gl.texSubImage2D( 3553, level || 0, position.x, position.y, width, height, glFormat, glType, srcTexture.image.data );\n\n\t\t} else {\n\n\t\t\t_gl.texSubImage2D( 3553, level || 0, position.x, position.y, glFormat, glType, srcTexture.image );\n\n\t\t}\n\n\t\tstate.unbindTexture();\n\n\t};\n\n\tthis.initTexture = function ( texture ) {\n\n\t\ttextures.setTexture2D( texture, 0 );\n\n\t\tstate.unbindTexture();\n\n\t};\n\n\tif ( typeof __THREE_DEVTOOLS__ !== 'undefined' ) {\n\n\t\t__THREE_DEVTOOLS__.dispatchEvent( new CustomEvent( 'observe', { detail: this } ) ); // eslint-disable-line no-undef\n\n\t}\n\n}\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n */\n\nfunction FogExp2( color, density ) {\n\n\tthis.name = '';\n\n\tthis.color = new Color( color );\n\tthis.density = ( density !== undefined ) ? density : 0.00025;\n\n}\n\nObject.assign( FogExp2.prototype, {\n\n\tisFogExp2: true,\n\n\tclone: function () {\n\n\t\treturn new FogExp2( this.color, this.density );\n\n\t},\n\n\ttoJSON: function ( /* meta */ ) {\n\n\t\treturn {\n\t\t\ttype: 'FogExp2',\n\t\t\tcolor: this.color.getHex(),\n\t\t\tdensity: this.density\n\t\t};\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n */\n\nfunction Fog( color, near, far ) {\n\n\tthis.name = '';\n\n\tthis.color = new Color( color );\n\n\tthis.near = ( near !== undefined ) ? near : 1;\n\tthis.far = ( far !== undefined ) ? far : 1000;\n\n}\n\nObject.assign( Fog.prototype, {\n\n\tisFog: true,\n\n\tclone: function () {\n\n\t\treturn new Fog( this.color, this.near, this.far );\n\n\t},\n\n\ttoJSON: function ( /* meta */ ) {\n\n\t\treturn {\n\t\t\ttype: 'Fog',\n\t\t\tcolor: this.color.getHex(),\n\t\t\tnear: this.near,\n\t\t\tfar: this.far\n\t\t};\n\n\t}\n\n} );\n\n/**\n * @author benaadams / https://twitter.com/ben_a_adams\n */\n\nfunction InterleavedBuffer( array, stride ) {\n\n\tthis.array = array;\n\tthis.stride = stride;\n\tthis.count = array !== undefined ? array.length / stride : 0;\n\n\tthis.usage = StaticDrawUsage;\n\tthis.updateRange = { offset: 0, count: - 1 };\n\n\tthis.version = 0;\n\n}\n\nObject.defineProperty( InterleavedBuffer.prototype, 'needsUpdate', {\n\n\tset: function ( value ) {\n\n\t\tif ( value === true ) this.version ++;\n\n\t}\n\n} );\n\nObject.assign( InterleavedBuffer.prototype, {\n\n\tisInterleavedBuffer: true,\n\n\tonUploadCallback: function () {},\n\n\tsetUsage: function ( value ) {\n\n\t\tthis.usage = value;\n\n\t\treturn this;\n\n\t},\n\n\tcopy: function ( source ) {\n\n\t\tthis.array = new source.array.constructor( source.array );\n\t\tthis.count = source.count;\n\t\tthis.stride = source.stride;\n\t\tthis.usage = source.usage;\n\n\t\treturn this;\n\n\t},\n\n\tcopyAt: function ( index1, attribute, index2 ) {\n\n\t\tindex1 *= this.stride;\n\t\tindex2 *= attribute.stride;\n\n\t\tfor ( var i = 0, l = this.stride; i < l; i ++ ) {\n\n\t\t\tthis.array[ index1 + i ] = attribute.array[ index2 + i ];\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tset: function ( value, offset ) {\n\n\t\tif ( offset === undefined ) offset = 0;\n\n\t\tthis.array.set( value, offset );\n\n\t\treturn this;\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor().copy( this );\n\n\t},\n\n\tonUpload: function ( callback ) {\n\n\t\tthis.onUploadCallback = callback;\n\n\t\treturn this;\n\n\t}\n\n} );\n\n/**\n * @author benaadams / https://twitter.com/ben_a_adams\n */\n\nvar _vector$6 = new Vector3();\n\nfunction InterleavedBufferAttribute( interleavedBuffer, itemSize, offset, normalized ) {\n\n\tthis.data = interleavedBuffer;\n\tthis.itemSize = itemSize;\n\tthis.offset = offset;\n\n\tthis.normalized = normalized === true;\n\n}\n\nObject.defineProperties( InterleavedBufferAttribute.prototype, {\n\n\tcount: {\n\n\t\tget: function () {\n\n\t\t\treturn this.data.count;\n\n\t\t}\n\n\t},\n\n\tarray: {\n\n\t\tget: function () {\n\n\t\t\treturn this.data.array;\n\n\t\t}\n\n\t}\n\n} );\n\nObject.assign( InterleavedBufferAttribute.prototype, {\n\n\tisInterleavedBufferAttribute: true,\n\n\tapplyMatrix4: function ( m ) {\n\n\t\tfor ( var i = 0, l = this.data.count; i < l; i ++ ) {\n\n\t\t\t_vector$6.x = this.getX( i );\n\t\t\t_vector$6.y = this.getY( i );\n\t\t\t_vector$6.z = this.getZ( i );\n\n\t\t\t_vector$6.applyMatrix4( m );\n\n\t\t\tthis.setXYZ( i, _vector$6.x, _vector$6.y, _vector$6.z );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tsetX: function ( index, x ) {\n\n\t\tthis.data.array[ index * this.data.stride + this.offset ] = x;\n\n\t\treturn this;\n\n\t},\n\n\tsetY: function ( index, y ) {\n\n\t\tthis.data.array[ index * this.data.stride + this.offset + 1 ] = y;\n\n\t\treturn this;\n\n\t},\n\n\tsetZ: function ( index, z ) {\n\n\t\tthis.data.array[ index * this.data.stride + this.offset + 2 ] = z;\n\n\t\treturn this;\n\n\t},\n\n\tsetW: function ( index, w ) {\n\n\t\tthis.data.array[ index * this.data.stride + this.offset + 3 ] = w;\n\n\t\treturn this;\n\n\t},\n\n\tgetX: function ( index ) {\n\n\t\treturn this.data.array[ index * this.data.stride + this.offset ];\n\n\t},\n\n\tgetY: function ( index ) {\n\n\t\treturn this.data.array[ index * this.data.stride + this.offset + 1 ];\n\n\t},\n\n\tgetZ: function ( index ) {\n\n\t\treturn this.data.array[ index * this.data.stride + this.offset + 2 ];\n\n\t},\n\n\tgetW: function ( index ) {\n\n\t\treturn this.data.array[ index * this.data.stride + this.offset + 3 ];\n\n\t},\n\n\tsetXY: function ( index, x, y ) {\n\n\t\tindex = index * this.data.stride + this.offset;\n\n\t\tthis.data.array[ index + 0 ] = x;\n\t\tthis.data.array[ index + 1 ] = y;\n\n\t\treturn this;\n\n\t},\n\n\tsetXYZ: function ( index, x, y, z ) {\n\n\t\tindex = index * this.data.stride + this.offset;\n\n\t\tthis.data.array[ index + 0 ] = x;\n\t\tthis.data.array[ index + 1 ] = y;\n\t\tthis.data.array[ index + 2 ] = z;\n\n\t\treturn this;\n\n\t},\n\n\tsetXYZW: function ( index, x, y, z, w ) {\n\n\t\tindex = index * this.data.stride + this.offset;\n\n\t\tthis.data.array[ index + 0 ] = x;\n\t\tthis.data.array[ index + 1 ] = y;\n\t\tthis.data.array[ index + 2 ] = z;\n\t\tthis.data.array[ index + 3 ] = w;\n\n\t\treturn this;\n\n\t}\n\n} );\n\n/**\n * @author alteredq / http://alteredqualia.com/\n *\n * parameters = {\n *  color: <hex>,\n *  map: new THREE.Texture( <Image> ),\n *  alphaMap: new THREE.Texture( <Image> ),\n *  rotation: <float>,\n *  sizeAttenuation: <bool>\n * }\n */\n\nfunction SpriteMaterial( parameters ) {\n\n\tMaterial.call( this );\n\n\tthis.type = 'SpriteMaterial';\n\n\tthis.color = new Color( 0xffffff );\n\n\tthis.map = null;\n\n\tthis.alphaMap = null;\n\n\tthis.rotation = 0;\n\n\tthis.sizeAttenuation = true;\n\n\tthis.transparent = true;\n\n\tthis.setValues( parameters );\n\n}\n\nSpriteMaterial.prototype = Object.create( Material.prototype );\nSpriteMaterial.prototype.constructor = SpriteMaterial;\nSpriteMaterial.prototype.isSpriteMaterial = true;\n\nSpriteMaterial.prototype.copy = function ( source ) {\n\n\tMaterial.prototype.copy.call( this, source );\n\n\tthis.color.copy( source.color );\n\n\tthis.map = source.map;\n\n\tthis.alphaMap = source.alphaMap;\n\n\tthis.rotation = source.rotation;\n\n\tthis.sizeAttenuation = source.sizeAttenuation;\n\n\treturn this;\n\n};\n\n/**\n * @author mikael emtinger / http://gomo.se/\n * @author alteredq / http://alteredqualia.com/\n */\n\nvar _geometry;\n\nvar _intersectPoint = new Vector3();\nvar _worldScale = new Vector3();\nvar _mvPosition = new Vector3();\n\nvar _alignedPosition = new Vector2();\nvar _rotatedPosition = new Vector2();\nvar _viewWorldMatrix = new Matrix4();\n\nvar _vA$1 = new Vector3();\nvar _vB$1 = new Vector3();\nvar _vC$1 = new Vector3();\n\nvar _uvA$1 = new Vector2();\nvar _uvB$1 = new Vector2();\nvar _uvC$1 = new Vector2();\n\nfunction Sprite( material ) {\n\n\tObject3D.call( this );\n\n\tthis.type = 'Sprite';\n\n\tif ( _geometry === undefined ) {\n\n\t\t_geometry = new BufferGeometry();\n\n\t\tvar float32Array = new Float32Array( [\n\t\t\t- 0.5, - 0.5, 0, 0, 0,\n\t\t\t0.5, - 0.5, 0, 1, 0,\n\t\t\t0.5, 0.5, 0, 1, 1,\n\t\t\t- 0.5, 0.5, 0, 0, 1\n\t\t] );\n\n\t\tvar interleavedBuffer = new InterleavedBuffer( float32Array, 5 );\n\n\t\t_geometry.setIndex( [ 0, 1, 2,\t0, 2, 3 ] );\n\t\t_geometry.setAttribute( 'position', new InterleavedBufferAttribute( interleavedBuffer, 3, 0, false ) );\n\t\t_geometry.setAttribute( 'uv', new InterleavedBufferAttribute( interleavedBuffer, 2, 3, false ) );\n\n\t}\n\n\tthis.geometry = _geometry;\n\tthis.material = ( material !== undefined ) ? material : new SpriteMaterial();\n\n\tthis.center = new Vector2( 0.5, 0.5 );\n\n}\n\nSprite.prototype = Object.assign( Object.create( Object3D.prototype ), {\n\n\tconstructor: Sprite,\n\n\tisSprite: true,\n\n\traycast: function ( raycaster, intersects ) {\n\n\t\tif ( raycaster.camera === null ) {\n\n\t\t\tconsole.error( 'THREE.Sprite: \"Raycaster.camera\" needs to be set in order to raycast against sprites.' );\n\n\t\t}\n\n\t\t_worldScale.setFromMatrixScale( this.matrixWorld );\n\n\t\t_viewWorldMatrix.copy( raycaster.camera.matrixWorld );\n\t\tthis.modelViewMatrix.multiplyMatrices( raycaster.camera.matrixWorldInverse, this.matrixWorld );\n\n\t\t_mvPosition.setFromMatrixPosition( this.modelViewMatrix );\n\n\t\tif ( raycaster.camera.isPerspectiveCamera && this.material.sizeAttenuation === false ) {\n\n\t\t\t_worldScale.multiplyScalar( - _mvPosition.z );\n\n\t\t}\n\n\t\tvar rotation = this.material.rotation;\n\t\tvar sin, cos;\n\t\tif ( rotation !== 0 ) {\n\n\t\t\tcos = Math.cos( rotation );\n\t\t\tsin = Math.sin( rotation );\n\n\t\t}\n\n\t\tvar center = this.center;\n\n\t\ttransformVertex( _vA$1.set( - 0.5, - 0.5, 0 ), _mvPosition, center, _worldScale, sin, cos );\n\t\ttransformVertex( _vB$1.set( 0.5, - 0.5, 0 ), _mvPosition, center, _worldScale, sin, cos );\n\t\ttransformVertex( _vC$1.set( 0.5, 0.5, 0 ), _mvPosition, center, _worldScale, sin, cos );\n\n\t\t_uvA$1.set( 0, 0 );\n\t\t_uvB$1.set( 1, 0 );\n\t\t_uvC$1.set( 1, 1 );\n\n\t\t// check first triangle\n\t\tvar intersect = raycaster.ray.intersectTriangle( _vA$1, _vB$1, _vC$1, false, _intersectPoint );\n\n\t\tif ( intersect === null ) {\n\n\t\t\t// check second triangle\n\t\t\ttransformVertex( _vB$1.set( - 0.5, 0.5, 0 ), _mvPosition, center, _worldScale, sin, cos );\n\t\t\t_uvB$1.set( 0, 1 );\n\n\t\t\tintersect = raycaster.ray.intersectTriangle( _vA$1, _vC$1, _vB$1, false, _intersectPoint );\n\t\t\tif ( intersect === null ) {\n\n\t\t\t\treturn;\n\n\t\t\t}\n\n\t\t}\n\n\t\tvar distance = raycaster.ray.origin.distanceTo( _intersectPoint );\n\n\t\tif ( distance < raycaster.near || distance > raycaster.far ) return;\n\n\t\tintersects.push( {\n\n\t\t\tdistance: distance,\n\t\t\tpoint: _intersectPoint.clone(),\n\t\t\tuv: Triangle.getUV( _intersectPoint, _vA$1, _vB$1, _vC$1, _uvA$1, _uvB$1, _uvC$1, new Vector2() ),\n\t\t\tface: null,\n\t\t\tobject: this\n\n\t\t} );\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor( this.material ).copy( this );\n\n\t},\n\n\tcopy: function ( source ) {\n\n\t\tObject3D.prototype.copy.call( this, source );\n\n\t\tif ( source.center !== undefined ) this.center.copy( source.center );\n\n\t\treturn this;\n\n\t}\n\n\n} );\n\nfunction transformVertex( vertexPosition, mvPosition, center, scale, sin, cos ) {\n\n\t// compute position in camera space\n\t_alignedPosition.subVectors( vertexPosition, center ).addScalar( 0.5 ).multiply( scale );\n\n\t// to check if rotation is not zero\n\tif ( sin !== undefined ) {\n\n\t\t_rotatedPosition.x = ( cos * _alignedPosition.x ) - ( sin * _alignedPosition.y );\n\t\t_rotatedPosition.y = ( sin * _alignedPosition.x ) + ( cos * _alignedPosition.y );\n\n\t} else {\n\n\t\t_rotatedPosition.copy( _alignedPosition );\n\n\t}\n\n\n\tvertexPosition.copy( mvPosition );\n\tvertexPosition.x += _rotatedPosition.x;\n\tvertexPosition.y += _rotatedPosition.y;\n\n\t// transform to world space\n\tvertexPosition.applyMatrix4( _viewWorldMatrix );\n\n}\n\n/**\n * @author mikael emtinger / http://gomo.se/\n * @author alteredq / http://alteredqualia.com/\n * @author mrdoob / http://mrdoob.com/\n */\n\nvar _v1$4 = new Vector3();\nvar _v2$2 = new Vector3();\n\nfunction LOD() {\n\n\tObject3D.call( this );\n\n\tthis._currentLevel = 0;\n\n\tthis.type = 'LOD';\n\n\tObject.defineProperties( this, {\n\t\tlevels: {\n\t\t\tenumerable: true,\n\t\t\tvalue: []\n\t\t}\n\t} );\n\n\tthis.autoUpdate = true;\n\n}\n\nLOD.prototype = Object.assign( Object.create( Object3D.prototype ), {\n\n\tconstructor: LOD,\n\n\tisLOD: true,\n\n\tcopy: function ( source ) {\n\n\t\tObject3D.prototype.copy.call( this, source, false );\n\n\t\tvar levels = source.levels;\n\n\t\tfor ( var i = 0, l = levels.length; i < l; i ++ ) {\n\n\t\t\tvar level = levels[ i ];\n\n\t\t\tthis.addLevel( level.object.clone(), level.distance );\n\n\t\t}\n\n\t\tthis.autoUpdate = source.autoUpdate;\n\n\t\treturn this;\n\n\t},\n\n\taddLevel: function ( object, distance ) {\n\n\t\tif ( distance === undefined ) distance = 0;\n\n\t\tdistance = Math.abs( distance );\n\n\t\tvar levels = this.levels;\n\n\t\tfor ( var l = 0; l < levels.length; l ++ ) {\n\n\t\t\tif ( distance < levels[ l ].distance ) {\n\n\t\t\t\tbreak;\n\n\t\t\t}\n\n\t\t}\n\n\t\tlevels.splice( l, 0, { distance: distance, object: object } );\n\n\t\tthis.add( object );\n\n\t\treturn this;\n\n\t},\n\n\tgetCurrentLevel: function () {\n\n\t\treturn this._currentLevel;\n\n\t},\n\n\tgetObjectForDistance: function ( distance ) {\n\n\t\tvar levels = this.levels;\n\n\t\tif ( levels.length > 0 ) {\n\n\t\t\tfor ( var i = 1, l = levels.length; i < l; i ++ ) {\n\n\t\t\t\tif ( distance < levels[ i ].distance ) {\n\n\t\t\t\t\tbreak;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\treturn levels[ i - 1 ].object;\n\n\t\t}\n\n\t\treturn null;\n\n\t},\n\n\traycast: function ( raycaster, intersects ) {\n\n\t\tvar levels = this.levels;\n\n\t\tif ( levels.length > 0 ) {\n\n\t\t\t_v1$4.setFromMatrixPosition( this.matrixWorld );\n\n\t\t\tvar distance = raycaster.ray.origin.distanceTo( _v1$4 );\n\n\t\t\tthis.getObjectForDistance( distance ).raycast( raycaster, intersects );\n\n\t\t}\n\n\t},\n\n\tupdate: function ( camera ) {\n\n\t\tvar levels = this.levels;\n\n\t\tif ( levels.length > 1 ) {\n\n\t\t\t_v1$4.setFromMatrixPosition( camera.matrixWorld );\n\t\t\t_v2$2.setFromMatrixPosition( this.matrixWorld );\n\n\t\t\tvar distance = _v1$4.distanceTo( _v2$2 ) / camera.zoom;\n\n\t\t\tlevels[ 0 ].object.visible = true;\n\n\t\t\tfor ( var i = 1, l = levels.length; i < l; i ++ ) {\n\n\t\t\t\tif ( distance >= levels[ i ].distance ) {\n\n\t\t\t\t\tlevels[ i - 1 ].object.visible = false;\n\t\t\t\t\tlevels[ i ].object.visible = true;\n\n\t\t\t\t} else {\n\n\t\t\t\t\tbreak;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tthis._currentLevel = i - 1;\n\n\t\t\tfor ( ; i < l; i ++ ) {\n\n\t\t\t\tlevels[ i ].object.visible = false;\n\n\t\t\t}\n\n\t\t}\n\n\t},\n\n\ttoJSON: function ( meta ) {\n\n\t\tvar data = Object3D.prototype.toJSON.call( this, meta );\n\n\t\tif ( this.autoUpdate === false ) data.object.autoUpdate = false;\n\n\t\tdata.object.levels = [];\n\n\t\tvar levels = this.levels;\n\n\t\tfor ( var i = 0, l = levels.length; i < l; i ++ ) {\n\n\t\t\tvar level = levels[ i ];\n\n\t\t\tdata.object.levels.push( {\n\t\t\t\tobject: level.object.uuid,\n\t\t\t\tdistance: level.distance\n\t\t\t} );\n\n\t\t}\n\n\t\treturn data;\n\n\t}\n\n} );\n\n/**\n * @author mikael emtinger / http://gomo.se/\n * @author alteredq / http://alteredqualia.com/\n * @author ikerr / http://verold.com\n */\n\nfunction SkinnedMesh( geometry, material ) {\n\n\tif ( geometry && geometry.isGeometry ) {\n\n\t\tconsole.error( 'THREE.SkinnedMesh no longer supports THREE.Geometry. Use THREE.BufferGeometry instead.' );\n\n\t}\n\n\tMesh.call( this, geometry, material );\n\n\tthis.type = 'SkinnedMesh';\n\n\tthis.bindMode = 'attached';\n\tthis.bindMatrix = new Matrix4();\n\tthis.bindMatrixInverse = new Matrix4();\n\n}\n\nSkinnedMesh.prototype = Object.assign( Object.create( Mesh.prototype ), {\n\n\tconstructor: SkinnedMesh,\n\n\tisSkinnedMesh: true,\n\n\tbind: function ( skeleton, bindMatrix ) {\n\n\t\tthis.skeleton = skeleton;\n\n\t\tif ( bindMatrix === undefined ) {\n\n\t\t\tthis.updateMatrixWorld( true );\n\n\t\t\tthis.skeleton.calculateInverses();\n\n\t\t\tbindMatrix = this.matrixWorld;\n\n\t\t}\n\n\t\tthis.bindMatrix.copy( bindMatrix );\n\t\tthis.bindMatrixInverse.getInverse( bindMatrix );\n\n\t},\n\n\tpose: function () {\n\n\t\tthis.skeleton.pose();\n\n\t},\n\n\tnormalizeSkinWeights: function () {\n\n\t\tvar vector = new Vector4();\n\n\t\tvar skinWeight = this.geometry.attributes.skinWeight;\n\n\t\tfor ( var i = 0, l = skinWeight.count; i < l; i ++ ) {\n\n\t\t\tvector.x = skinWeight.getX( i );\n\t\t\tvector.y = skinWeight.getY( i );\n\t\t\tvector.z = skinWeight.getZ( i );\n\t\t\tvector.w = skinWeight.getW( i );\n\n\t\t\tvar scale = 1.0 / vector.manhattanLength();\n\n\t\t\tif ( scale !== Infinity ) {\n\n\t\t\t\tvector.multiplyScalar( scale );\n\n\t\t\t} else {\n\n\t\t\t\tvector.set( 1, 0, 0, 0 ); // do something reasonable\n\n\t\t\t}\n\n\t\t\tskinWeight.setXYZW( i, vector.x, vector.y, vector.z, vector.w );\n\n\t\t}\n\n\t},\n\n\tupdateMatrixWorld: function ( force ) {\n\n\t\tMesh.prototype.updateMatrixWorld.call( this, force );\n\n\t\tif ( this.bindMode === 'attached' ) {\n\n\t\t\tthis.bindMatrixInverse.getInverse( this.matrixWorld );\n\n\t\t} else if ( this.bindMode === 'detached' ) {\n\n\t\t\tthis.bindMatrixInverse.getInverse( this.bindMatrix );\n\n\t\t} else {\n\n\t\t\tconsole.warn( 'THREE.SkinnedMesh: Unrecognized bindMode: ' + this.bindMode );\n\n\t\t}\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor( this.geometry, this.material ).copy( this );\n\n\t}\n\n} );\n\n/**\n * @author mikael emtinger / http://gomo.se/\n * @author alteredq / http://alteredqualia.com/\n * @author michael guerrero / http://realitymeltdown.com\n * @author ikerr / http://verold.com\n */\n\nvar _offsetMatrix = new Matrix4();\nvar _identityMatrix = new Matrix4();\n\nfunction Skeleton( bones, boneInverses ) {\n\n\t// copy the bone array\n\n\tbones = bones || [];\n\n\tthis.bones = bones.slice( 0 );\n\tthis.boneMatrices = new Float32Array( this.bones.length * 16 );\n\n\tthis.frame = - 1;\n\n\t// use the supplied bone inverses or calculate the inverses\n\n\tif ( boneInverses === undefined ) {\n\n\t\tthis.calculateInverses();\n\n\t} else {\n\n\t\tif ( this.bones.length === boneInverses.length ) {\n\n\t\t\tthis.boneInverses = boneInverses.slice( 0 );\n\n\t\t} else {\n\n\t\t\tconsole.warn( 'THREE.Skeleton boneInverses is the wrong length.' );\n\n\t\t\tthis.boneInverses = [];\n\n\t\t\tfor ( var i = 0, il = this.bones.length; i < il; i ++ ) {\n\n\t\t\t\tthis.boneInverses.push( new Matrix4() );\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n}\n\nObject.assign( Skeleton.prototype, {\n\n\tcalculateInverses: function () {\n\n\t\tthis.boneInverses = [];\n\n\t\tfor ( var i = 0, il = this.bones.length; i < il; i ++ ) {\n\n\t\t\tvar inverse = new Matrix4();\n\n\t\t\tif ( this.bones[ i ] ) {\n\n\t\t\t\tinverse.getInverse( this.bones[ i ].matrixWorld );\n\n\t\t\t}\n\n\t\t\tthis.boneInverses.push( inverse );\n\n\t\t}\n\n\t},\n\n\tpose: function () {\n\n\t\tvar bone, i, il;\n\n\t\t// recover the bind-time world matrices\n\n\t\tfor ( i = 0, il = this.bones.length; i < il; i ++ ) {\n\n\t\t\tbone = this.bones[ i ];\n\n\t\t\tif ( bone ) {\n\n\t\t\t\tbone.matrixWorld.getInverse( this.boneInverses[ i ] );\n\n\t\t\t}\n\n\t\t}\n\n\t\t// compute the local matrices, positions, rotations and scales\n\n\t\tfor ( i = 0, il = this.bones.length; i < il; i ++ ) {\n\n\t\t\tbone = this.bones[ i ];\n\n\t\t\tif ( bone ) {\n\n\t\t\t\tif ( bone.parent && bone.parent.isBone ) {\n\n\t\t\t\t\tbone.matrix.getInverse( bone.parent.matrixWorld );\n\t\t\t\t\tbone.matrix.multiply( bone.matrixWorld );\n\n\t\t\t\t} else {\n\n\t\t\t\t\tbone.matrix.copy( bone.matrixWorld );\n\n\t\t\t\t}\n\n\t\t\t\tbone.matrix.decompose( bone.position, bone.quaternion, bone.scale );\n\n\t\t\t}\n\n\t\t}\n\n\t},\n\n\tupdate: function () {\n\n\t\tvar bones = this.bones;\n\t\tvar boneInverses = this.boneInverses;\n\t\tvar boneMatrices = this.boneMatrices;\n\t\tvar boneTexture = this.boneTexture;\n\n\t\t// flatten bone matrices to array\n\n\t\tfor ( var i = 0, il = bones.length; i < il; i ++ ) {\n\n\t\t\t// compute the offset between the current and the original transform\n\n\t\t\tvar matrix = bones[ i ] ? bones[ i ].matrixWorld : _identityMatrix;\n\n\t\t\t_offsetMatrix.multiplyMatrices( matrix, boneInverses[ i ] );\n\t\t\t_offsetMatrix.toArray( boneMatrices, i * 16 );\n\n\t\t}\n\n\t\tif ( boneTexture !== undefined ) {\n\n\t\t\tboneTexture.needsUpdate = true;\n\n\t\t}\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new Skeleton( this.bones, this.boneInverses );\n\n\t},\n\n\tgetBoneByName: function ( name ) {\n\n\t\tfor ( var i = 0, il = this.bones.length; i < il; i ++ ) {\n\n\t\t\tvar bone = this.bones[ i ];\n\n\t\t\tif ( bone.name === name ) {\n\n\t\t\t\treturn bone;\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn undefined;\n\n\t}\n\n} );\n\n/**\n * @author mikael emtinger / http://gomo.se/\n * @author alteredq / http://alteredqualia.com/\n * @author ikerr / http://verold.com\n */\n\nfunction Bone() {\n\n\tObject3D.call( this );\n\n\tthis.type = 'Bone';\n\n}\n\nBone.prototype = Object.assign( Object.create( Object3D.prototype ), {\n\n\tconstructor: Bone,\n\n\tisBone: true\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nvar _instanceLocalMatrix = new Matrix4();\nvar _instanceWorldMatrix = new Matrix4();\n\nvar _instanceIntersects = [];\n\nvar _mesh = new Mesh();\n\nfunction InstancedMesh( geometry, material, count ) {\n\n\tMesh.call( this, geometry, material );\n\n\tthis.instanceMatrix = new BufferAttribute( new Float32Array( count * 16 ), 16 );\n\n\tthis.count = count;\n\n\tthis.frustumCulled = false;\n\n}\n\nInstancedMesh.prototype = Object.assign( Object.create( Mesh.prototype ), {\n\n\tconstructor: InstancedMesh,\n\n\tisInstancedMesh: true,\n\n\tgetMatrixAt: function ( index, matrix ) {\n\n\t\tmatrix.fromArray( this.instanceMatrix.array, index * 16 );\n\n\t},\n\n\traycast: function ( raycaster, intersects ) {\n\n\t\tvar matrixWorld = this.matrixWorld;\n\t\tvar raycastTimes = this.count;\n\n\t\t_mesh.geometry = this.geometry;\n\t\t_mesh.material = this.material;\n\n\t\tif ( _mesh.material === undefined ) return;\n\n\t\tfor ( var instanceId = 0; instanceId < raycastTimes; instanceId ++ ) {\n\n\t\t\t// calculate the world matrix for each instance\n\n\t\t\tthis.getMatrixAt( instanceId, _instanceLocalMatrix );\n\n\t\t\t_instanceWorldMatrix.multiplyMatrices( matrixWorld, _instanceLocalMatrix );\n\n\t\t\t// the mesh represents this single instance\n\n\t\t\t_mesh.matrixWorld = _instanceWorldMatrix;\n\n\t\t\t_mesh.raycast( raycaster, _instanceIntersects );\n\n\t\t\t// process the result of raycast\n\n\t\t\tif ( _instanceIntersects.length > 0 ) {\n\n\t\t\t\t_instanceIntersects[ 0 ].instanceId = instanceId;\n\t\t\t\t_instanceIntersects[ 0 ].object = this;\n\n\t\t\t\tintersects.push( _instanceIntersects[ 0 ] );\n\n\t\t\t\t_instanceIntersects.length = 0;\n\n\t\t\t}\n\n\t\t}\n\n\t},\n\n\tsetMatrixAt: function ( index, matrix ) {\n\n\t\tmatrix.toArray( this.instanceMatrix.array, index * 16 );\n\n\t},\n\n\tupdateMorphTargets: function () {\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n *\n * parameters = {\n *  color: <hex>,\n *  opacity: <float>,\n *\n *  linewidth: <float>,\n *  linecap: \"round\",\n *  linejoin: \"round\"\n * }\n */\n\nfunction LineBasicMaterial( parameters ) {\n\n\tMaterial.call( this );\n\n\tthis.type = 'LineBasicMaterial';\n\n\tthis.color = new Color( 0xffffff );\n\n\tthis.linewidth = 1;\n\tthis.linecap = 'round';\n\tthis.linejoin = 'round';\n\n\tthis.setValues( parameters );\n\n}\n\nLineBasicMaterial.prototype = Object.create( Material.prototype );\nLineBasicMaterial.prototype.constructor = LineBasicMaterial;\n\nLineBasicMaterial.prototype.isLineBasicMaterial = true;\n\nLineBasicMaterial.prototype.copy = function ( source ) {\n\n\tMaterial.prototype.copy.call( this, source );\n\n\tthis.color.copy( source.color );\n\n\tthis.linewidth = source.linewidth;\n\tthis.linecap = source.linecap;\n\tthis.linejoin = source.linejoin;\n\n\treturn this;\n\n};\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nvar _start = new Vector3();\nvar _end = new Vector3();\nvar _inverseMatrix$1 = new Matrix4();\nvar _ray$1 = new Ray();\nvar _sphere$2 = new Sphere();\n\nfunction Line( geometry, material, mode ) {\n\n\tif ( mode === 1 ) {\n\n\t\tconsole.error( 'THREE.Line: parameter THREE.LinePieces no longer supported. Use THREE.LineSegments instead.' );\n\n\t}\n\n\tObject3D.call( this );\n\n\tthis.type = 'Line';\n\n\tthis.geometry = geometry !== undefined ? geometry : new BufferGeometry();\n\tthis.material = material !== undefined ? material : new LineBasicMaterial();\n\n}\n\nLine.prototype = Object.assign( Object.create( Object3D.prototype ), {\n\n\tconstructor: Line,\n\n\tisLine: true,\n\n\tcomputeLineDistances: function () {\n\n\t\tvar geometry = this.geometry;\n\n\t\tif ( geometry.isBufferGeometry ) {\n\n\t\t\t// we assume non-indexed geometry\n\n\t\t\tif ( geometry.index === null ) {\n\n\t\t\t\tvar positionAttribute = geometry.attributes.position;\n\t\t\t\tvar lineDistances = [ 0 ];\n\n\t\t\t\tfor ( var i = 1, l = positionAttribute.count; i < l; i ++ ) {\n\n\t\t\t\t\t_start.fromBufferAttribute( positionAttribute, i - 1 );\n\t\t\t\t\t_end.fromBufferAttribute( positionAttribute, i );\n\n\t\t\t\t\tlineDistances[ i ] = lineDistances[ i - 1 ];\n\t\t\t\t\tlineDistances[ i ] += _start.distanceTo( _end );\n\n\t\t\t\t}\n\n\t\t\t\tgeometry.setAttribute( 'lineDistance', new Float32BufferAttribute( lineDistances, 1 ) );\n\n\t\t\t} else {\n\n\t\t\t\tconsole.warn( 'THREE.Line.computeLineDistances(): Computation only possible with non-indexed BufferGeometry.' );\n\n\t\t\t}\n\n\t\t} else if ( geometry.isGeometry ) {\n\n\t\t\tvar vertices = geometry.vertices;\n\t\t\tvar lineDistances = geometry.lineDistances;\n\n\t\t\tlineDistances[ 0 ] = 0;\n\n\t\t\tfor ( var i = 1, l = vertices.length; i < l; i ++ ) {\n\n\t\t\t\tlineDistances[ i ] = lineDistances[ i - 1 ];\n\t\t\t\tlineDistances[ i ] += vertices[ i - 1 ].distanceTo( vertices[ i ] );\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\traycast: function ( raycaster, intersects ) {\n\n\t\tvar geometry = this.geometry;\n\t\tvar matrixWorld = this.matrixWorld;\n\t\tvar threshold = raycaster.params.Line.threshold;\n\n\t\t// Checking boundingSphere distance to ray\n\n\t\tif ( geometry.boundingSphere === null ) geometry.computeBoundingSphere();\n\n\t\t_sphere$2.copy( geometry.boundingSphere );\n\t\t_sphere$2.applyMatrix4( matrixWorld );\n\t\t_sphere$2.radius += threshold;\n\n\t\tif ( raycaster.ray.intersectsSphere( _sphere$2 ) === false ) return;\n\n\t\t//\n\n\t\t_inverseMatrix$1.getInverse( matrixWorld );\n\t\t_ray$1.copy( raycaster.ray ).applyMatrix4( _inverseMatrix$1 );\n\n\t\tvar localThreshold = threshold / ( ( this.scale.x + this.scale.y + this.scale.z ) / 3 );\n\t\tvar localThresholdSq = localThreshold * localThreshold;\n\n\t\tvar vStart = new Vector3();\n\t\tvar vEnd = new Vector3();\n\t\tvar interSegment = new Vector3();\n\t\tvar interRay = new Vector3();\n\t\tvar step = ( this && this.isLineSegments ) ? 2 : 1;\n\n\t\tif ( geometry.isBufferGeometry ) {\n\n\t\t\tvar index = geometry.index;\n\t\t\tvar attributes = geometry.attributes;\n\t\t\tvar positions = attributes.position.array;\n\n\t\t\tif ( index !== null ) {\n\n\t\t\t\tvar indices = index.array;\n\n\t\t\t\tfor ( var i = 0, l = indices.length - 1; i < l; i += step ) {\n\n\t\t\t\t\tvar a = indices[ i ];\n\t\t\t\t\tvar b = indices[ i + 1 ];\n\n\t\t\t\t\tvStart.fromArray( positions, a * 3 );\n\t\t\t\t\tvEnd.fromArray( positions, b * 3 );\n\n\t\t\t\t\tvar distSq = _ray$1.distanceSqToSegment( vStart, vEnd, interRay, interSegment );\n\n\t\t\t\t\tif ( distSq > localThresholdSq ) continue;\n\n\t\t\t\t\tinterRay.applyMatrix4( this.matrixWorld ); //Move back to world space for distance calculation\n\n\t\t\t\t\tvar distance = raycaster.ray.origin.distanceTo( interRay );\n\n\t\t\t\t\tif ( distance < raycaster.near || distance > raycaster.far ) continue;\n\n\t\t\t\t\tintersects.push( {\n\n\t\t\t\t\t\tdistance: distance,\n\t\t\t\t\t\t// What do we want? intersection point on the ray or on the segment??\n\t\t\t\t\t\t// point: raycaster.ray.at( distance ),\n\t\t\t\t\t\tpoint: interSegment.clone().applyMatrix4( this.matrixWorld ),\n\t\t\t\t\t\tindex: i,\n\t\t\t\t\t\tface: null,\n\t\t\t\t\t\tfaceIndex: null,\n\t\t\t\t\t\tobject: this\n\n\t\t\t\t\t} );\n\n\t\t\t\t}\n\n\t\t\t} else {\n\n\t\t\t\tfor ( var i = 0, l = positions.length / 3 - 1; i < l; i += step ) {\n\n\t\t\t\t\tvStart.fromArray( positions, 3 * i );\n\t\t\t\t\tvEnd.fromArray( positions, 3 * i + 3 );\n\n\t\t\t\t\tvar distSq = _ray$1.distanceSqToSegment( vStart, vEnd, interRay, interSegment );\n\n\t\t\t\t\tif ( distSq > localThresholdSq ) continue;\n\n\t\t\t\t\tinterRay.applyMatrix4( this.matrixWorld ); //Move back to world space for distance calculation\n\n\t\t\t\t\tvar distance = raycaster.ray.origin.distanceTo( interRay );\n\n\t\t\t\t\tif ( distance < raycaster.near || distance > raycaster.far ) continue;\n\n\t\t\t\t\tintersects.push( {\n\n\t\t\t\t\t\tdistance: distance,\n\t\t\t\t\t\t// What do we want? intersection point on the ray or on the segment??\n\t\t\t\t\t\t// point: raycaster.ray.at( distance ),\n\t\t\t\t\t\tpoint: interSegment.clone().applyMatrix4( this.matrixWorld ),\n\t\t\t\t\t\tindex: i,\n\t\t\t\t\t\tface: null,\n\t\t\t\t\t\tfaceIndex: null,\n\t\t\t\t\t\tobject: this\n\n\t\t\t\t\t} );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t} else if ( geometry.isGeometry ) {\n\n\t\t\tvar vertices = geometry.vertices;\n\t\t\tvar nbVertices = vertices.length;\n\n\t\t\tfor ( var i = 0; i < nbVertices - 1; i += step ) {\n\n\t\t\t\tvar distSq = _ray$1.distanceSqToSegment( vertices[ i ], vertices[ i + 1 ], interRay, interSegment );\n\n\t\t\t\tif ( distSq > localThresholdSq ) continue;\n\n\t\t\t\tinterRay.applyMatrix4( this.matrixWorld ); //Move back to world space for distance calculation\n\n\t\t\t\tvar distance = raycaster.ray.origin.distanceTo( interRay );\n\n\t\t\t\tif ( distance < raycaster.near || distance > raycaster.far ) continue;\n\n\t\t\t\tintersects.push( {\n\n\t\t\t\t\tdistance: distance,\n\t\t\t\t\t// What do we want? intersection point on the ray or on the segment??\n\t\t\t\t\t// point: raycaster.ray.at( distance ),\n\t\t\t\t\tpoint: interSegment.clone().applyMatrix4( this.matrixWorld ),\n\t\t\t\t\tindex: i,\n\t\t\t\t\tface: null,\n\t\t\t\t\tfaceIndex: null,\n\t\t\t\t\tobject: this\n\n\t\t\t\t} );\n\n\t\t\t}\n\n\t\t}\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor( this.geometry, this.material ).copy( this );\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nvar _start$1 = new Vector3();\nvar _end$1 = new Vector3();\n\nfunction LineSegments( geometry, material ) {\n\n\tLine.call( this, geometry, material );\n\n\tthis.type = 'LineSegments';\n\n}\n\nLineSegments.prototype = Object.assign( Object.create( Line.prototype ), {\n\n\tconstructor: LineSegments,\n\n\tisLineSegments: true,\n\n\tcomputeLineDistances: function () {\n\n\t\tvar geometry = this.geometry;\n\n\t\tif ( geometry.isBufferGeometry ) {\n\n\t\t\t// we assume non-indexed geometry\n\n\t\t\tif ( geometry.index === null ) {\n\n\t\t\t\tvar positionAttribute = geometry.attributes.position;\n\t\t\t\tvar lineDistances = [];\n\n\t\t\t\tfor ( var i = 0, l = positionAttribute.count; i < l; i += 2 ) {\n\n\t\t\t\t\t_start$1.fromBufferAttribute( positionAttribute, i );\n\t\t\t\t\t_end$1.fromBufferAttribute( positionAttribute, i + 1 );\n\n\t\t\t\t\tlineDistances[ i ] = ( i === 0 ) ? 0 : lineDistances[ i - 1 ];\n\t\t\t\t\tlineDistances[ i + 1 ] = lineDistances[ i ] + _start$1.distanceTo( _end$1 );\n\n\t\t\t\t}\n\n\t\t\t\tgeometry.setAttribute( 'lineDistance', new Float32BufferAttribute( lineDistances, 1 ) );\n\n\t\t\t} else {\n\n\t\t\t\tconsole.warn( 'THREE.LineSegments.computeLineDistances(): Computation only possible with non-indexed BufferGeometry.' );\n\n\t\t\t}\n\n\t\t} else if ( geometry.isGeometry ) {\n\n\t\t\tvar vertices = geometry.vertices;\n\t\t\tvar lineDistances = geometry.lineDistances;\n\n\t\t\tfor ( var i = 0, l = vertices.length; i < l; i += 2 ) {\n\n\t\t\t\t_start$1.copy( vertices[ i ] );\n\t\t\t\t_end$1.copy( vertices[ i + 1 ] );\n\n\t\t\t\tlineDistances[ i ] = ( i === 0 ) ? 0 : lineDistances[ i - 1 ];\n\t\t\t\tlineDistances[ i + 1 ] = lineDistances[ i ] + _start$1.distanceTo( _end$1 );\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n} );\n\n/**\n * @author mgreter / http://github.com/mgreter\n */\n\nfunction LineLoop( geometry, material ) {\n\n\tLine.call( this, geometry, material );\n\n\tthis.type = 'LineLoop';\n\n}\n\nLineLoop.prototype = Object.assign( Object.create( Line.prototype ), {\n\n\tconstructor: LineLoop,\n\n\tisLineLoop: true,\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n *\n * parameters = {\n *  color: <hex>,\n *  opacity: <float>,\n *  map: new THREE.Texture( <Image> ),\n *  alphaMap: new THREE.Texture( <Image> ),\n *\n *  size: <float>,\n *  sizeAttenuation: <bool>\n *\n *  morphTargets: <bool>\n * }\n */\n\nfunction PointsMaterial( parameters ) {\n\n\tMaterial.call( this );\n\n\tthis.type = 'PointsMaterial';\n\n\tthis.color = new Color( 0xffffff );\n\n\tthis.map = null;\n\n\tthis.alphaMap = null;\n\n\tthis.size = 1;\n\tthis.sizeAttenuation = true;\n\n\tthis.morphTargets = false;\n\n\tthis.setValues( parameters );\n\n}\n\nPointsMaterial.prototype = Object.create( Material.prototype );\nPointsMaterial.prototype.constructor = PointsMaterial;\n\nPointsMaterial.prototype.isPointsMaterial = true;\n\nPointsMaterial.prototype.copy = function ( source ) {\n\n\tMaterial.prototype.copy.call( this, source );\n\n\tthis.color.copy( source.color );\n\n\tthis.map = source.map;\n\n\tthis.alphaMap = source.alphaMap;\n\n\tthis.size = source.size;\n\tthis.sizeAttenuation = source.sizeAttenuation;\n\n\tthis.morphTargets = source.morphTargets;\n\n\treturn this;\n\n};\n\n/**\n * @author alteredq / http://alteredqualia.com/\n */\n\nvar _inverseMatrix$2 = new Matrix4();\nvar _ray$2 = new Ray();\nvar _sphere$3 = new Sphere();\nvar _position$1 = new Vector3();\n\nfunction Points( geometry, material ) {\n\n\tObject3D.call( this );\n\n\tthis.type = 'Points';\n\n\tthis.geometry = geometry !== undefined ? geometry : new BufferGeometry();\n\tthis.material = material !== undefined ? material : new PointsMaterial();\n\n\tthis.updateMorphTargets();\n\n}\n\nPoints.prototype = Object.assign( Object.create( Object3D.prototype ), {\n\n\tconstructor: Points,\n\n\tisPoints: true,\n\n\traycast: function ( raycaster, intersects ) {\n\n\t\tvar geometry = this.geometry;\n\t\tvar matrixWorld = this.matrixWorld;\n\t\tvar threshold = raycaster.params.Points.threshold;\n\n\t\t// Checking boundingSphere distance to ray\n\n\t\tif ( geometry.boundingSphere === null ) geometry.computeBoundingSphere();\n\n\t\t_sphere$3.copy( geometry.boundingSphere );\n\t\t_sphere$3.applyMatrix4( matrixWorld );\n\t\t_sphere$3.radius += threshold;\n\n\t\tif ( raycaster.ray.intersectsSphere( _sphere$3 ) === false ) return;\n\n\t\t//\n\n\t\t_inverseMatrix$2.getInverse( matrixWorld );\n\t\t_ray$2.copy( raycaster.ray ).applyMatrix4( _inverseMatrix$2 );\n\n\t\tvar localThreshold = threshold / ( ( this.scale.x + this.scale.y + this.scale.z ) / 3 );\n\t\tvar localThresholdSq = localThreshold * localThreshold;\n\n\t\tif ( geometry.isBufferGeometry ) {\n\n\t\t\tvar index = geometry.index;\n\t\t\tvar attributes = geometry.attributes;\n\t\t\tvar positions = attributes.position.array;\n\n\t\t\tif ( index !== null ) {\n\n\t\t\t\tvar indices = index.array;\n\n\t\t\t\tfor ( var i = 0, il = indices.length; i < il; i ++ ) {\n\n\t\t\t\t\tvar a = indices[ i ];\n\n\t\t\t\t\t_position$1.fromArray( positions, a * 3 );\n\n\t\t\t\t\ttestPoint( _position$1, a, localThresholdSq, matrixWorld, raycaster, intersects, this );\n\n\t\t\t\t}\n\n\t\t\t} else {\n\n\t\t\t\tfor ( var i = 0, l = positions.length / 3; i < l; i ++ ) {\n\n\t\t\t\t\t_position$1.fromArray( positions, i * 3 );\n\n\t\t\t\t\ttestPoint( _position$1, i, localThresholdSq, matrixWorld, raycaster, intersects, this );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\tvar vertices = geometry.vertices;\n\n\t\t\tfor ( var i = 0, l = vertices.length; i < l; i ++ ) {\n\n\t\t\t\ttestPoint( vertices[ i ], i, localThresholdSq, matrixWorld, raycaster, intersects, this );\n\n\t\t\t}\n\n\t\t}\n\n\t},\n\n\tupdateMorphTargets: function () {\n\n\t\tvar geometry = this.geometry;\n\t\tvar m, ml, name;\n\n\t\tif ( geometry.isBufferGeometry ) {\n\n\t\t\tvar morphAttributes = geometry.morphAttributes;\n\t\t\tvar keys = Object.keys( morphAttributes );\n\n\t\t\tif ( keys.length > 0 ) {\n\n\t\t\t\tvar morphAttribute = morphAttributes[ keys[ 0 ] ];\n\n\t\t\t\tif ( morphAttribute !== undefined ) {\n\n\t\t\t\t\tthis.morphTargetInfluences = [];\n\t\t\t\t\tthis.morphTargetDictionary = {};\n\n\t\t\t\t\tfor ( m = 0, ml = morphAttribute.length; m < ml; m ++ ) {\n\n\t\t\t\t\t\tname = morphAttribute[ m ].name || String( m );\n\n\t\t\t\t\t\tthis.morphTargetInfluences.push( 0 );\n\t\t\t\t\t\tthis.morphTargetDictionary[ name ] = m;\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\tvar morphTargets = geometry.morphTargets;\n\n\t\t\tif ( morphTargets !== undefined && morphTargets.length > 0 ) {\n\n\t\t\t\tconsole.error( 'THREE.Points.updateMorphTargets() does not support THREE.Geometry. Use THREE.BufferGeometry instead.' );\n\n\t\t\t}\n\n\t\t}\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor( this.geometry, this.material ).copy( this );\n\n\t}\n\n} );\n\nfunction testPoint( point, index, localThresholdSq, matrixWorld, raycaster, intersects, object ) {\n\n\tvar rayPointDistanceSq = _ray$2.distanceSqToPoint( point );\n\n\tif ( rayPointDistanceSq < localThresholdSq ) {\n\n\t\tvar intersectPoint = new Vector3();\n\n\t\t_ray$2.closestPointToPoint( point, intersectPoint );\n\t\tintersectPoint.applyMatrix4( matrixWorld );\n\n\t\tvar distance = raycaster.ray.origin.distanceTo( intersectPoint );\n\n\t\tif ( distance < raycaster.near || distance > raycaster.far ) return;\n\n\t\tintersects.push( {\n\n\t\t\tdistance: distance,\n\t\t\tdistanceToRay: Math.sqrt( rayPointDistanceSq ),\n\t\t\tpoint: intersectPoint,\n\t\t\tindex: index,\n\t\t\tface: null,\n\t\t\tobject: object\n\n\t\t} );\n\n\t}\n\n}\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction VideoTexture( video, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy ) {\n\n\tTexture.call( this, video, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy );\n\n\tthis.format = format !== undefined ? format : RGBFormat;\n\n\tthis.minFilter = minFilter !== undefined ? minFilter : LinearFilter;\n\tthis.magFilter = magFilter !== undefined ? magFilter : LinearFilter;\n\n\tthis.generateMipmaps = false;\n\n}\n\nVideoTexture.prototype = Object.assign( Object.create( Texture.prototype ), {\n\n\tconstructor: VideoTexture,\n\n\tisVideoTexture: true,\n\n\tupdate: function () {\n\n\t\tvar video = this.image;\n\n\t\tif ( video.readyState >= video.HAVE_CURRENT_DATA ) {\n\n\t\t\tthis.needsUpdate = true;\n\n\t\t}\n\n\t}\n\n} );\n\n/**\n * @author alteredq / http://alteredqualia.com/\n */\n\nfunction CompressedTexture( mipmaps, width, height, format, type, mapping, wrapS, wrapT, magFilter, minFilter, anisotropy, encoding ) {\n\n\tTexture.call( this, null, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding );\n\n\tthis.image = { width: width, height: height };\n\tthis.mipmaps = mipmaps;\n\n\t// no flipping for cube textures\n\t// (also flipping doesn't work for compressed textures )\n\n\tthis.flipY = false;\n\n\t// can't generate mipmaps for compressed textures\n\t// mips must be embedded in DDS files\n\n\tthis.generateMipmaps = false;\n\n}\n\nCompressedTexture.prototype = Object.create( Texture.prototype );\nCompressedTexture.prototype.constructor = CompressedTexture;\n\nCompressedTexture.prototype.isCompressedTexture = true;\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction CanvasTexture( canvas, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy ) {\n\n\tTexture.call( this, canvas, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy );\n\n\tthis.needsUpdate = true;\n\n}\n\nCanvasTexture.prototype = Object.create( Texture.prototype );\nCanvasTexture.prototype.constructor = CanvasTexture;\nCanvasTexture.prototype.isCanvasTexture = true;\n\n/**\n * @author Matt DesLauriers / @mattdesl\n * @author atix / arthursilber.de\n */\n\nfunction DepthTexture( width, height, type, mapping, wrapS, wrapT, magFilter, minFilter, anisotropy, format ) {\n\n\tformat = format !== undefined ? format : DepthFormat;\n\n\tif ( format !== DepthFormat && format !== DepthStencilFormat ) {\n\n\t\tthrow new Error( 'DepthTexture format must be either THREE.DepthFormat or THREE.DepthStencilFormat' );\n\n\t}\n\n\tif ( type === undefined && format === DepthFormat ) type = UnsignedShortType;\n\tif ( type === undefined && format === DepthStencilFormat ) type = UnsignedInt248Type;\n\n\tTexture.call( this, null, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy );\n\n\tthis.image = { width: width, height: height };\n\n\tthis.magFilter = magFilter !== undefined ? magFilter : NearestFilter;\n\tthis.minFilter = minFilter !== undefined ? minFilter : NearestFilter;\n\n\tthis.flipY = false;\n\tthis.generateMipmaps\t= false;\n\n}\n\nDepthTexture.prototype = Object.create( Texture.prototype );\nDepthTexture.prototype.constructor = DepthTexture;\nDepthTexture.prototype.isDepthTexture = true;\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author Mugen87 / https://github.com/Mugen87\n */\n\nfunction WireframeGeometry( geometry ) {\n\n\tBufferGeometry.call( this );\n\n\tthis.type = 'WireframeGeometry';\n\n\t// buffer\n\n\tvar vertices = [];\n\n\t// helper variables\n\n\tvar i, j, l, o, ol;\n\tvar edge = [ 0, 0 ], edges = {}, e, edge1, edge2;\n\tvar key, keys = [ 'a', 'b', 'c' ];\n\tvar vertex;\n\n\t// different logic for Geometry and BufferGeometry\n\n\tif ( geometry && geometry.isGeometry ) {\n\n\t\t// create a data structure that contains all edges without duplicates\n\n\t\tvar faces = geometry.faces;\n\n\t\tfor ( i = 0, l = faces.length; i < l; i ++ ) {\n\n\t\t\tvar face = faces[ i ];\n\n\t\t\tfor ( j = 0; j < 3; j ++ ) {\n\n\t\t\t\tedge1 = face[ keys[ j ] ];\n\t\t\t\tedge2 = face[ keys[ ( j + 1 ) % 3 ] ];\n\t\t\t\tedge[ 0 ] = Math.min( edge1, edge2 ); // sorting prevents duplicates\n\t\t\t\tedge[ 1 ] = Math.max( edge1, edge2 );\n\n\t\t\t\tkey = edge[ 0 ] + ',' + edge[ 1 ];\n\n\t\t\t\tif ( edges[ key ] === undefined ) {\n\n\t\t\t\t\tedges[ key ] = { index1: edge[ 0 ], index2: edge[ 1 ] };\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\t// generate vertices\n\n\t\tfor ( key in edges ) {\n\n\t\t\te = edges[ key ];\n\n\t\t\tvertex = geometry.vertices[ e.index1 ];\n\t\t\tvertices.push( vertex.x, vertex.y, vertex.z );\n\n\t\t\tvertex = geometry.vertices[ e.index2 ];\n\t\t\tvertices.push( vertex.x, vertex.y, vertex.z );\n\n\t\t}\n\n\t} else if ( geometry && geometry.isBufferGeometry ) {\n\n\t\tvar position, indices, groups;\n\t\tvar group, start, count;\n\t\tvar index1, index2;\n\n\t\tvertex = new Vector3();\n\n\t\tif ( geometry.index !== null ) {\n\n\t\t\t// indexed BufferGeometry\n\n\t\t\tposition = geometry.attributes.position;\n\t\t\tindices = geometry.index;\n\t\t\tgroups = geometry.groups;\n\n\t\t\tif ( groups.length === 0 ) {\n\n\t\t\t\tgroups = [ { start: 0, count: indices.count, materialIndex: 0 } ];\n\n\t\t\t}\n\n\t\t\t// create a data structure that contains all eges without duplicates\n\n\t\t\tfor ( o = 0, ol = groups.length; o < ol; ++ o ) {\n\n\t\t\t\tgroup = groups[ o ];\n\n\t\t\t\tstart = group.start;\n\t\t\t\tcount = group.count;\n\n\t\t\t\tfor ( i = start, l = ( start + count ); i < l; i += 3 ) {\n\n\t\t\t\t\tfor ( j = 0; j < 3; j ++ ) {\n\n\t\t\t\t\t\tedge1 = indices.getX( i + j );\n\t\t\t\t\t\tedge2 = indices.getX( i + ( j + 1 ) % 3 );\n\t\t\t\t\t\tedge[ 0 ] = Math.min( edge1, edge2 ); // sorting prevents duplicates\n\t\t\t\t\t\tedge[ 1 ] = Math.max( edge1, edge2 );\n\n\t\t\t\t\t\tkey = edge[ 0 ] + ',' + edge[ 1 ];\n\n\t\t\t\t\t\tif ( edges[ key ] === undefined ) {\n\n\t\t\t\t\t\t\tedges[ key ] = { index1: edge[ 0 ], index2: edge[ 1 ] };\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\t// generate vertices\n\n\t\t\tfor ( key in edges ) {\n\n\t\t\t\te = edges[ key ];\n\n\t\t\t\tvertex.fromBufferAttribute( position, e.index1 );\n\t\t\t\tvertices.push( vertex.x, vertex.y, vertex.z );\n\n\t\t\t\tvertex.fromBufferAttribute( position, e.index2 );\n\t\t\t\tvertices.push( vertex.x, vertex.y, vertex.z );\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\t// non-indexed BufferGeometry\n\n\t\t\tposition = geometry.attributes.position;\n\n\t\t\tfor ( i = 0, l = ( position.count / 3 ); i < l; i ++ ) {\n\n\t\t\t\tfor ( j = 0; j < 3; j ++ ) {\n\n\t\t\t\t\t// three edges per triangle, an edge is represented as (index1, index2)\n\t\t\t\t\t// e.g. the first triangle has the following edges: (0,1),(1,2),(2,0)\n\n\t\t\t\t\tindex1 = 3 * i + j;\n\t\t\t\t\tvertex.fromBufferAttribute( position, index1 );\n\t\t\t\t\tvertices.push( vertex.x, vertex.y, vertex.z );\n\n\t\t\t\t\tindex2 = 3 * i + ( ( j + 1 ) % 3 );\n\t\t\t\t\tvertex.fromBufferAttribute( position, index2 );\n\t\t\t\t\tvertices.push( vertex.x, vertex.y, vertex.z );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\t// build geometry\n\n\tthis.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\n}\n\nWireframeGeometry.prototype = Object.create( BufferGeometry.prototype );\nWireframeGeometry.prototype.constructor = WireframeGeometry;\n\n/**\n * @author zz85 / https://github.com/zz85\n * @author Mugen87 / https://github.com/Mugen87\n *\n * Parametric Surfaces Geometry\n * based on the brilliant article by @prideout https://prideout.net/blog/old/blog/index.html@p=44.html\n */\n\n// ParametricGeometry\n\nfunction ParametricGeometry( func, slices, stacks ) {\n\n\tGeometry.call( this );\n\n\tthis.type = 'ParametricGeometry';\n\n\tthis.parameters = {\n\t\tfunc: func,\n\t\tslices: slices,\n\t\tstacks: stacks\n\t};\n\n\tthis.fromBufferGeometry( new ParametricBufferGeometry( func, slices, stacks ) );\n\tthis.mergeVertices();\n\n}\n\nParametricGeometry.prototype = Object.create( Geometry.prototype );\nParametricGeometry.prototype.constructor = ParametricGeometry;\n\n// ParametricBufferGeometry\n\nfunction ParametricBufferGeometry( func, slices, stacks ) {\n\n\tBufferGeometry.call( this );\n\n\tthis.type = 'ParametricBufferGeometry';\n\n\tthis.parameters = {\n\t\tfunc: func,\n\t\tslices: slices,\n\t\tstacks: stacks\n\t};\n\n\t// buffers\n\n\tvar indices = [];\n\tvar vertices = [];\n\tvar normals = [];\n\tvar uvs = [];\n\n\tvar EPS = 0.00001;\n\n\tvar normal = new Vector3();\n\n\tvar p0 = new Vector3(), p1 = new Vector3();\n\tvar pu = new Vector3(), pv = new Vector3();\n\n\tvar i, j;\n\n\tif ( func.length < 3 ) {\n\n\t\tconsole.error( 'THREE.ParametricGeometry: Function must now modify a Vector3 as third parameter.' );\n\n\t}\n\n\t// generate vertices, normals and uvs\n\n\tvar sliceCount = slices + 1;\n\n\tfor ( i = 0; i <= stacks; i ++ ) {\n\n\t\tvar v = i / stacks;\n\n\t\tfor ( j = 0; j <= slices; j ++ ) {\n\n\t\t\tvar u = j / slices;\n\n\t\t\t// vertex\n\n\t\t\tfunc( u, v, p0 );\n\t\t\tvertices.push( p0.x, p0.y, p0.z );\n\n\t\t\t// normal\n\n\t\t\t// approximate tangent vectors via finite differences\n\n\t\t\tif ( u - EPS >= 0 ) {\n\n\t\t\t\tfunc( u - EPS, v, p1 );\n\t\t\t\tpu.subVectors( p0, p1 );\n\n\t\t\t} else {\n\n\t\t\t\tfunc( u + EPS, v, p1 );\n\t\t\t\tpu.subVectors( p1, p0 );\n\n\t\t\t}\n\n\t\t\tif ( v - EPS >= 0 ) {\n\n\t\t\t\tfunc( u, v - EPS, p1 );\n\t\t\t\tpv.subVectors( p0, p1 );\n\n\t\t\t} else {\n\n\t\t\t\tfunc( u, v + EPS, p1 );\n\t\t\t\tpv.subVectors( p1, p0 );\n\n\t\t\t}\n\n\t\t\t// cross product of tangent vectors returns surface normal\n\n\t\t\tnormal.crossVectors( pu, pv ).normalize();\n\t\t\tnormals.push( normal.x, normal.y, normal.z );\n\n\t\t\t// uv\n\n\t\t\tuvs.push( u, v );\n\n\t\t}\n\n\t}\n\n\t// generate indices\n\n\tfor ( i = 0; i < stacks; i ++ ) {\n\n\t\tfor ( j = 0; j < slices; j ++ ) {\n\n\t\t\tvar a = i * sliceCount + j;\n\t\t\tvar b = i * sliceCount + j + 1;\n\t\t\tvar c = ( i + 1 ) * sliceCount + j + 1;\n\t\t\tvar d = ( i + 1 ) * sliceCount + j;\n\n\t\t\t// faces one and two\n\n\t\t\tindices.push( a, b, d );\n\t\t\tindices.push( b, c, d );\n\n\t\t}\n\n\t}\n\n\t// build geometry\n\n\tthis.setIndex( indices );\n\tthis.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\tthis.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );\n\tthis.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );\n\n}\n\nParametricBufferGeometry.prototype = Object.create( BufferGeometry.prototype );\nParametricBufferGeometry.prototype.constructor = ParametricBufferGeometry;\n\n/**\n * @author clockworkgeek / https://github.com/clockworkgeek\n * @author timothypratley / https://github.com/timothypratley\n * @author WestLangley / http://github.com/WestLangley\n * @author Mugen87 / https://github.com/Mugen87\n */\n\n// PolyhedronGeometry\n\nfunction PolyhedronGeometry( vertices, indices, radius, detail ) {\n\n\tGeometry.call( this );\n\n\tthis.type = 'PolyhedronGeometry';\n\n\tthis.parameters = {\n\t\tvertices: vertices,\n\t\tindices: indices,\n\t\tradius: radius,\n\t\tdetail: detail\n\t};\n\n\tthis.fromBufferGeometry( new PolyhedronBufferGeometry( vertices, indices, radius, detail ) );\n\tthis.mergeVertices();\n\n}\n\nPolyhedronGeometry.prototype = Object.create( Geometry.prototype );\nPolyhedronGeometry.prototype.constructor = PolyhedronGeometry;\n\n// PolyhedronBufferGeometry\n\nfunction PolyhedronBufferGeometry( vertices, indices, radius, detail ) {\n\n\tBufferGeometry.call( this );\n\n\tthis.type = 'PolyhedronBufferGeometry';\n\n\tthis.parameters = {\n\t\tvertices: vertices,\n\t\tindices: indices,\n\t\tradius: radius,\n\t\tdetail: detail\n\t};\n\n\tradius = radius || 1;\n\tdetail = detail || 0;\n\n\t// default buffer data\n\n\tvar vertexBuffer = [];\n\tvar uvBuffer = [];\n\n\t// the subdivision creates the vertex buffer data\n\n\tsubdivide( detail );\n\n\t// all vertices should lie on a conceptual sphere with a given radius\n\n\tapplyRadius( radius );\n\n\t// finally, create the uv data\n\n\tgenerateUVs();\n\n\t// build non-indexed geometry\n\n\tthis.setAttribute( 'position', new Float32BufferAttribute( vertexBuffer, 3 ) );\n\tthis.setAttribute( 'normal', new Float32BufferAttribute( vertexBuffer.slice(), 3 ) );\n\tthis.setAttribute( 'uv', new Float32BufferAttribute( uvBuffer, 2 ) );\n\n\tif ( detail === 0 ) {\n\n\t\tthis.computeVertexNormals(); // flat normals\n\n\t} else {\n\n\t\tthis.normalizeNormals(); // smooth normals\n\n\t}\n\n\t// helper functions\n\n\tfunction subdivide( detail ) {\n\n\t\tvar a = new Vector3();\n\t\tvar b = new Vector3();\n\t\tvar c = new Vector3();\n\n\t\t// iterate over all faces and apply a subdivison with the given detail value\n\n\t\tfor ( var i = 0; i < indices.length; i += 3 ) {\n\n\t\t\t// get the vertices of the face\n\n\t\t\tgetVertexByIndex( indices[ i + 0 ], a );\n\t\t\tgetVertexByIndex( indices[ i + 1 ], b );\n\t\t\tgetVertexByIndex( indices[ i + 2 ], c );\n\n\t\t\t// perform subdivision\n\n\t\t\tsubdivideFace( a, b, c, detail );\n\n\t\t}\n\n\t}\n\n\tfunction subdivideFace( a, b, c, detail ) {\n\n\t\tvar cols = Math.pow( 2, detail );\n\n\t\t// we use this multidimensional array as a data structure for creating the subdivision\n\n\t\tvar v = [];\n\n\t\tvar i, j;\n\n\t\t// construct all of the vertices for this subdivision\n\n\t\tfor ( i = 0; i <= cols; i ++ ) {\n\n\t\t\tv[ i ] = [];\n\n\t\t\tvar aj = a.clone().lerp( c, i / cols );\n\t\t\tvar bj = b.clone().lerp( c, i / cols );\n\n\t\t\tvar rows = cols - i;\n\n\t\t\tfor ( j = 0; j <= rows; j ++ ) {\n\n\t\t\t\tif ( j === 0 && i === cols ) {\n\n\t\t\t\t\tv[ i ][ j ] = aj;\n\n\t\t\t\t} else {\n\n\t\t\t\t\tv[ i ][ j ] = aj.clone().lerp( bj, j / rows );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\t// construct all of the faces\n\n\t\tfor ( i = 0; i < cols; i ++ ) {\n\n\t\t\tfor ( j = 0; j < 2 * ( cols - i ) - 1; j ++ ) {\n\n\t\t\t\tvar k = Math.floor( j / 2 );\n\n\t\t\t\tif ( j % 2 === 0 ) {\n\n\t\t\t\t\tpushVertex( v[ i ][ k + 1 ] );\n\t\t\t\t\tpushVertex( v[ i + 1 ][ k ] );\n\t\t\t\t\tpushVertex( v[ i ][ k ] );\n\n\t\t\t\t} else {\n\n\t\t\t\t\tpushVertex( v[ i ][ k + 1 ] );\n\t\t\t\t\tpushVertex( v[ i + 1 ][ k + 1 ] );\n\t\t\t\t\tpushVertex( v[ i + 1 ][ k ] );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\tfunction applyRadius( radius ) {\n\n\t\tvar vertex = new Vector3();\n\n\t\t// iterate over the entire buffer and apply the radius to each vertex\n\n\t\tfor ( var i = 0; i < vertexBuffer.length; i += 3 ) {\n\n\t\t\tvertex.x = vertexBuffer[ i + 0 ];\n\t\t\tvertex.y = vertexBuffer[ i + 1 ];\n\t\t\tvertex.z = vertexBuffer[ i + 2 ];\n\n\t\t\tvertex.normalize().multiplyScalar( radius );\n\n\t\t\tvertexBuffer[ i + 0 ] = vertex.x;\n\t\t\tvertexBuffer[ i + 1 ] = vertex.y;\n\t\t\tvertexBuffer[ i + 2 ] = vertex.z;\n\n\t\t}\n\n\t}\n\n\tfunction generateUVs() {\n\n\t\tvar vertex = new Vector3();\n\n\t\tfor ( var i = 0; i < vertexBuffer.length; i += 3 ) {\n\n\t\t\tvertex.x = vertexBuffer[ i + 0 ];\n\t\t\tvertex.y = vertexBuffer[ i + 1 ];\n\t\t\tvertex.z = vertexBuffer[ i + 2 ];\n\n\t\t\tvar u = azimuth( vertex ) / 2 / Math.PI + 0.5;\n\t\t\tvar v = inclination( vertex ) / Math.PI + 0.5;\n\t\t\tuvBuffer.push( u, 1 - v );\n\n\t\t}\n\n\t\tcorrectUVs();\n\n\t\tcorrectSeam();\n\n\t}\n\n\tfunction correctSeam() {\n\n\t\t// handle case when face straddles the seam, see #3269\n\n\t\tfor ( var i = 0; i < uvBuffer.length; i += 6 ) {\n\n\t\t\t// uv data of a single face\n\n\t\t\tvar x0 = uvBuffer[ i + 0 ];\n\t\t\tvar x1 = uvBuffer[ i + 2 ];\n\t\t\tvar x2 = uvBuffer[ i + 4 ];\n\n\t\t\tvar max = Math.max( x0, x1, x2 );\n\t\t\tvar min = Math.min( x0, x1, x2 );\n\n\t\t\t// 0.9 is somewhat arbitrary\n\n\t\t\tif ( max > 0.9 && min < 0.1 ) {\n\n\t\t\t\tif ( x0 < 0.2 ) uvBuffer[ i + 0 ] += 1;\n\t\t\t\tif ( x1 < 0.2 ) uvBuffer[ i + 2 ] += 1;\n\t\t\t\tif ( x2 < 0.2 ) uvBuffer[ i + 4 ] += 1;\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\tfunction pushVertex( vertex ) {\n\n\t\tvertexBuffer.push( vertex.x, vertex.y, vertex.z );\n\n\t}\n\n\tfunction getVertexByIndex( index, vertex ) {\n\n\t\tvar stride = index * 3;\n\n\t\tvertex.x = vertices[ stride + 0 ];\n\t\tvertex.y = vertices[ stride + 1 ];\n\t\tvertex.z = vertices[ stride + 2 ];\n\n\t}\n\n\tfunction correctUVs() {\n\n\t\tvar a = new Vector3();\n\t\tvar b = new Vector3();\n\t\tvar c = new Vector3();\n\n\t\tvar centroid = new Vector3();\n\n\t\tvar uvA = new Vector2();\n\t\tvar uvB = new Vector2();\n\t\tvar uvC = new Vector2();\n\n\t\tfor ( var i = 0, j = 0; i < vertexBuffer.length; i += 9, j += 6 ) {\n\n\t\t\ta.set( vertexBuffer[ i + 0 ], vertexBuffer[ i + 1 ], vertexBuffer[ i + 2 ] );\n\t\t\tb.set( vertexBuffer[ i + 3 ], vertexBuffer[ i + 4 ], vertexBuffer[ i + 5 ] );\n\t\t\tc.set( vertexBuffer[ i + 6 ], vertexBuffer[ i + 7 ], vertexBuffer[ i + 8 ] );\n\n\t\t\tuvA.set( uvBuffer[ j + 0 ], uvBuffer[ j + 1 ] );\n\t\t\tuvB.set( uvBuffer[ j + 2 ], uvBuffer[ j + 3 ] );\n\t\t\tuvC.set( uvBuffer[ j + 4 ], uvBuffer[ j + 5 ] );\n\n\t\t\tcentroid.copy( a ).add( b ).add( c ).divideScalar( 3 );\n\n\t\t\tvar azi = azimuth( centroid );\n\n\t\t\tcorrectUV( uvA, j + 0, a, azi );\n\t\t\tcorrectUV( uvB, j + 2, b, azi );\n\t\t\tcorrectUV( uvC, j + 4, c, azi );\n\n\t\t}\n\n\t}\n\n\tfunction correctUV( uv, stride, vector, azimuth ) {\n\n\t\tif ( ( azimuth < 0 ) && ( uv.x === 1 ) ) {\n\n\t\t\tuvBuffer[ stride ] = uv.x - 1;\n\n\t\t}\n\n\t\tif ( ( vector.x === 0 ) && ( vector.z === 0 ) ) {\n\n\t\t\tuvBuffer[ stride ] = azimuth / 2 / Math.PI + 0.5;\n\n\t\t}\n\n\t}\n\n\t// Angle around the Y axis, counter-clockwise when looking from above.\n\n\tfunction azimuth( vector ) {\n\n\t\treturn Math.atan2( vector.z, - vector.x );\n\n\t}\n\n\n\t// Angle above the XZ plane.\n\n\tfunction inclination( vector ) {\n\n\t\treturn Math.atan2( - vector.y, Math.sqrt( ( vector.x * vector.x ) + ( vector.z * vector.z ) ) );\n\n\t}\n\n}\n\nPolyhedronBufferGeometry.prototype = Object.create( BufferGeometry.prototype );\nPolyhedronBufferGeometry.prototype.constructor = PolyhedronBufferGeometry;\n\n/**\n * @author timothypratley / https://github.com/timothypratley\n * @author Mugen87 / https://github.com/Mugen87\n */\n\n// TetrahedronGeometry\n\nfunction TetrahedronGeometry( radius, detail ) {\n\n\tGeometry.call( this );\n\n\tthis.type = 'TetrahedronGeometry';\n\n\tthis.parameters = {\n\t\tradius: radius,\n\t\tdetail: detail\n\t};\n\n\tthis.fromBufferGeometry( new TetrahedronBufferGeometry( radius, detail ) );\n\tthis.mergeVertices();\n\n}\n\nTetrahedronGeometry.prototype = Object.create( Geometry.prototype );\nTetrahedronGeometry.prototype.constructor = TetrahedronGeometry;\n\n// TetrahedronBufferGeometry\n\nfunction TetrahedronBufferGeometry( radius, detail ) {\n\n\tvar vertices = [\n\t\t1, 1, 1, \t- 1, - 1, 1, \t- 1, 1, - 1, \t1, - 1, - 1\n\t];\n\n\tvar indices = [\n\t\t2, 1, 0, \t0, 3, 2,\t1, 3, 0,\t2, 3, 1\n\t];\n\n\tPolyhedronBufferGeometry.call( this, vertices, indices, radius, detail );\n\n\tthis.type = 'TetrahedronBufferGeometry';\n\n\tthis.parameters = {\n\t\tradius: radius,\n\t\tdetail: detail\n\t};\n\n}\n\nTetrahedronBufferGeometry.prototype = Object.create( PolyhedronBufferGeometry.prototype );\nTetrahedronBufferGeometry.prototype.constructor = TetrahedronBufferGeometry;\n\n/**\n * @author timothypratley / https://github.com/timothypratley\n * @author Mugen87 / https://github.com/Mugen87\n */\n\n// OctahedronGeometry\n\nfunction OctahedronGeometry( radius, detail ) {\n\n\tGeometry.call( this );\n\n\tthis.type = 'OctahedronGeometry';\n\n\tthis.parameters = {\n\t\tradius: radius,\n\t\tdetail: detail\n\t};\n\n\tthis.fromBufferGeometry( new OctahedronBufferGeometry( radius, detail ) );\n\tthis.mergeVertices();\n\n}\n\nOctahedronGeometry.prototype = Object.create( Geometry.prototype );\nOctahedronGeometry.prototype.constructor = OctahedronGeometry;\n\n// OctahedronBufferGeometry\n\nfunction OctahedronBufferGeometry( radius, detail ) {\n\n\tvar vertices = [\n\t\t1, 0, 0, \t- 1, 0, 0,\t0, 1, 0,\n\t\t0, - 1, 0, \t0, 0, 1,\t0, 0, - 1\n\t];\n\n\tvar indices = [\n\t\t0, 2, 4,\t0, 4, 3,\t0, 3, 5,\n\t\t0, 5, 2,\t1, 2, 5,\t1, 5, 3,\n\t\t1, 3, 4,\t1, 4, 2\n\t];\n\n\tPolyhedronBufferGeometry.call( this, vertices, indices, radius, detail );\n\n\tthis.type = 'OctahedronBufferGeometry';\n\n\tthis.parameters = {\n\t\tradius: radius,\n\t\tdetail: detail\n\t};\n\n}\n\nOctahedronBufferGeometry.prototype = Object.create( PolyhedronBufferGeometry.prototype );\nOctahedronBufferGeometry.prototype.constructor = OctahedronBufferGeometry;\n\n/**\n * @author timothypratley / https://github.com/timothypratley\n * @author Mugen87 / https://github.com/Mugen87\n */\n\n// IcosahedronGeometry\n\nfunction IcosahedronGeometry( radius, detail ) {\n\n\tGeometry.call( this );\n\n\tthis.type = 'IcosahedronGeometry';\n\n\tthis.parameters = {\n\t\tradius: radius,\n\t\tdetail: detail\n\t};\n\n\tthis.fromBufferGeometry( new IcosahedronBufferGeometry( radius, detail ) );\n\tthis.mergeVertices();\n\n}\n\nIcosahedronGeometry.prototype = Object.create( Geometry.prototype );\nIcosahedronGeometry.prototype.constructor = IcosahedronGeometry;\n\n// IcosahedronBufferGeometry\n\nfunction IcosahedronBufferGeometry( radius, detail ) {\n\n\tvar t = ( 1 + Math.sqrt( 5 ) ) / 2;\n\n\tvar vertices = [\n\t\t- 1, t, 0, \t1, t, 0, \t- 1, - t, 0, \t1, - t, 0,\n\t\t 0, - 1, t, \t0, 1, t,\t0, - 1, - t, \t0, 1, - t,\n\t\t t, 0, - 1, \tt, 0, 1, \t- t, 0, - 1, \t- t, 0, 1\n\t];\n\n\tvar indices = [\n\t\t 0, 11, 5, \t0, 5, 1, \t0, 1, 7, \t0, 7, 10, \t0, 10, 11,\n\t\t 1, 5, 9, \t5, 11, 4,\t11, 10, 2,\t10, 7, 6,\t7, 1, 8,\n\t\t 3, 9, 4, \t3, 4, 2,\t3, 2, 6,\t3, 6, 8,\t3, 8, 9,\n\t\t 4, 9, 5, \t2, 4, 11,\t6, 2, 10,\t8, 6, 7,\t9, 8, 1\n\t];\n\n\tPolyhedronBufferGeometry.call( this, vertices, indices, radius, detail );\n\n\tthis.type = 'IcosahedronBufferGeometry';\n\n\tthis.parameters = {\n\t\tradius: radius,\n\t\tdetail: detail\n\t};\n\n}\n\nIcosahedronBufferGeometry.prototype = Object.create( PolyhedronBufferGeometry.prototype );\nIcosahedronBufferGeometry.prototype.constructor = IcosahedronBufferGeometry;\n\n/**\n * @author Abe Pazos / https://hamoid.com\n * @author Mugen87 / https://github.com/Mugen87\n */\n\n// DodecahedronGeometry\n\nfunction DodecahedronGeometry( radius, detail ) {\n\n\tGeometry.call( this );\n\n\tthis.type = 'DodecahedronGeometry';\n\n\tthis.parameters = {\n\t\tradius: radius,\n\t\tdetail: detail\n\t};\n\n\tthis.fromBufferGeometry( new DodecahedronBufferGeometry( radius, detail ) );\n\tthis.mergeVertices();\n\n}\n\nDodecahedronGeometry.prototype = Object.create( Geometry.prototype );\nDodecahedronGeometry.prototype.constructor = DodecahedronGeometry;\n\n// DodecahedronBufferGeometry\n\nfunction DodecahedronBufferGeometry( radius, detail ) {\n\n\tvar t = ( 1 + Math.sqrt( 5 ) ) / 2;\n\tvar r = 1 / t;\n\n\tvar vertices = [\n\n\t\t// (±1, ±1, ±1)\n\t\t- 1, - 1, - 1,\t- 1, - 1, 1,\n\t\t- 1, 1, - 1, - 1, 1, 1,\n\t\t1, - 1, - 1, 1, - 1, 1,\n\t\t1, 1, - 1, 1, 1, 1,\n\n\t\t// (0, ±1/φ, ±φ)\n\t\t 0, - r, - t, 0, - r, t,\n\t\t 0, r, - t, 0, r, t,\n\n\t\t// (±1/φ, ±φ, 0)\n\t\t- r, - t, 0, - r, t, 0,\n\t\t r, - t, 0, r, t, 0,\n\n\t\t// (±φ, 0, ±1/φ)\n\t\t- t, 0, - r, t, 0, - r,\n\t\t- t, 0, r, t, 0, r\n\t];\n\n\tvar indices = [\n\t\t3, 11, 7, \t3, 7, 15, \t3, 15, 13,\n\t\t7, 19, 17, \t7, 17, 6, \t7, 6, 15,\n\t\t17, 4, 8, \t17, 8, 10, \t17, 10, 6,\n\t\t8, 0, 16, \t8, 16, 2, \t8, 2, 10,\n\t\t0, 12, 1, \t0, 1, 18, \t0, 18, 16,\n\t\t6, 10, 2, \t6, 2, 13, \t6, 13, 15,\n\t\t2, 16, 18, \t2, 18, 3, \t2, 3, 13,\n\t\t18, 1, 9, \t18, 9, 11, \t18, 11, 3,\n\t\t4, 14, 12, \t4, 12, 0, \t4, 0, 8,\n\t\t11, 9, 5, \t11, 5, 19, \t11, 19, 7,\n\t\t19, 5, 14, \t19, 14, 4, \t19, 4, 17,\n\t\t1, 12, 14, \t1, 14, 5, \t1, 5, 9\n\t];\n\n\tPolyhedronBufferGeometry.call( this, vertices, indices, radius, detail );\n\n\tthis.type = 'DodecahedronBufferGeometry';\n\n\tthis.parameters = {\n\t\tradius: radius,\n\t\tdetail: detail\n\t};\n\n}\n\nDodecahedronBufferGeometry.prototype = Object.create( PolyhedronBufferGeometry.prototype );\nDodecahedronBufferGeometry.prototype.constructor = DodecahedronBufferGeometry;\n\n/**\n * @author oosmoxiecode / https://github.com/oosmoxiecode\n * @author WestLangley / https://github.com/WestLangley\n * @author zz85 / https://github.com/zz85\n * @author miningold / https://github.com/miningold\n * @author jonobr1 / https://github.com/jonobr1\n * @author Mugen87 / https://github.com/Mugen87\n *\n */\n\n// TubeGeometry\n\nfunction TubeGeometry( path, tubularSegments, radius, radialSegments, closed, taper ) {\n\n\tGeometry.call( this );\n\n\tthis.type = 'TubeGeometry';\n\n\tthis.parameters = {\n\t\tpath: path,\n\t\ttubularSegments: tubularSegments,\n\t\tradius: radius,\n\t\tradialSegments: radialSegments,\n\t\tclosed: closed\n\t};\n\n\tif ( taper !== undefined ) console.warn( 'THREE.TubeGeometry: taper has been removed.' );\n\n\tvar bufferGeometry = new TubeBufferGeometry( path, tubularSegments, radius, radialSegments, closed );\n\n\t// expose internals\n\n\tthis.tangents = bufferGeometry.tangents;\n\tthis.normals = bufferGeometry.normals;\n\tthis.binormals = bufferGeometry.binormals;\n\n\t// create geometry\n\n\tthis.fromBufferGeometry( bufferGeometry );\n\tthis.mergeVertices();\n\n}\n\nTubeGeometry.prototype = Object.create( Geometry.prototype );\nTubeGeometry.prototype.constructor = TubeGeometry;\n\n// TubeBufferGeometry\n\nfunction TubeBufferGeometry( path, tubularSegments, radius, radialSegments, closed ) {\n\n\tBufferGeometry.call( this );\n\n\tthis.type = 'TubeBufferGeometry';\n\n\tthis.parameters = {\n\t\tpath: path,\n\t\ttubularSegments: tubularSegments,\n\t\tradius: radius,\n\t\tradialSegments: radialSegments,\n\t\tclosed: closed\n\t};\n\n\ttubularSegments = tubularSegments || 64;\n\tradius = radius || 1;\n\tradialSegments = radialSegments || 8;\n\tclosed = closed || false;\n\n\tvar frames = path.computeFrenetFrames( tubularSegments, closed );\n\n\t// expose internals\n\n\tthis.tangents = frames.tangents;\n\tthis.normals = frames.normals;\n\tthis.binormals = frames.binormals;\n\n\t// helper variables\n\n\tvar vertex = new Vector3();\n\tvar normal = new Vector3();\n\tvar uv = new Vector2();\n\tvar P = new Vector3();\n\n\tvar i, j;\n\n\t// buffer\n\n\tvar vertices = [];\n\tvar normals = [];\n\tvar uvs = [];\n\tvar indices = [];\n\n\t// create buffer data\n\n\tgenerateBufferData();\n\n\t// build geometry\n\n\tthis.setIndex( indices );\n\tthis.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\tthis.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );\n\tthis.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );\n\n\t// functions\n\n\tfunction generateBufferData() {\n\n\t\tfor ( i = 0; i < tubularSegments; i ++ ) {\n\n\t\t\tgenerateSegment( i );\n\n\t\t}\n\n\t\t// if the geometry is not closed, generate the last row of vertices and normals\n\t\t// at the regular position on the given path\n\t\t//\n\t\t// if the geometry is closed, duplicate the first row of vertices and normals (uvs will differ)\n\n\t\tgenerateSegment( ( closed === false ) ? tubularSegments : 0 );\n\n\t\t// uvs are generated in a separate function.\n\t\t// this makes it easy compute correct values for closed geometries\n\n\t\tgenerateUVs();\n\n\t\t// finally create faces\n\n\t\tgenerateIndices();\n\n\t}\n\n\tfunction generateSegment( i ) {\n\n\t\t// we use getPointAt to sample evenly distributed points from the given path\n\n\t\tP = path.getPointAt( i / tubularSegments, P );\n\n\t\t// retrieve corresponding normal and binormal\n\n\t\tvar N = frames.normals[ i ];\n\t\tvar B = frames.binormals[ i ];\n\n\t\t// generate normals and vertices for the current segment\n\n\t\tfor ( j = 0; j <= radialSegments; j ++ ) {\n\n\t\t\tvar v = j / radialSegments * Math.PI * 2;\n\n\t\t\tvar sin = Math.sin( v );\n\t\t\tvar cos = - Math.cos( v );\n\n\t\t\t// normal\n\n\t\t\tnormal.x = ( cos * N.x + sin * B.x );\n\t\t\tnormal.y = ( cos * N.y + sin * B.y );\n\t\t\tnormal.z = ( cos * N.z + sin * B.z );\n\t\t\tnormal.normalize();\n\n\t\t\tnormals.push( normal.x, normal.y, normal.z );\n\n\t\t\t// vertex\n\n\t\t\tvertex.x = P.x + radius * normal.x;\n\t\t\tvertex.y = P.y + radius * normal.y;\n\t\t\tvertex.z = P.z + radius * normal.z;\n\n\t\t\tvertices.push( vertex.x, vertex.y, vertex.z );\n\n\t\t}\n\n\t}\n\n\tfunction generateIndices() {\n\n\t\tfor ( j = 1; j <= tubularSegments; j ++ ) {\n\n\t\t\tfor ( i = 1; i <= radialSegments; i ++ ) {\n\n\t\t\t\tvar a = ( radialSegments + 1 ) * ( j - 1 ) + ( i - 1 );\n\t\t\t\tvar b = ( radialSegments + 1 ) * j + ( i - 1 );\n\t\t\t\tvar c = ( radialSegments + 1 ) * j + i;\n\t\t\t\tvar d = ( radialSegments + 1 ) * ( j - 1 ) + i;\n\n\t\t\t\t// faces\n\n\t\t\t\tindices.push( a, b, d );\n\t\t\t\tindices.push( b, c, d );\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\tfunction generateUVs() {\n\n\t\tfor ( i = 0; i <= tubularSegments; i ++ ) {\n\n\t\t\tfor ( j = 0; j <= radialSegments; j ++ ) {\n\n\t\t\t\tuv.x = i / tubularSegments;\n\t\t\t\tuv.y = j / radialSegments;\n\n\t\t\t\tuvs.push( uv.x, uv.y );\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n}\n\nTubeBufferGeometry.prototype = Object.create( BufferGeometry.prototype );\nTubeBufferGeometry.prototype.constructor = TubeBufferGeometry;\n\nTubeBufferGeometry.prototype.toJSON = function () {\n\n\tvar data = BufferGeometry.prototype.toJSON.call( this );\n\n\tdata.path = this.parameters.path.toJSON();\n\n\treturn data;\n\n};\n\n/**\n * @author oosmoxiecode\n * @author Mugen87 / https://github.com/Mugen87\n *\n * based on http://www.blackpawn.com/texts/pqtorus/\n */\n\n// TorusKnotGeometry\n\nfunction TorusKnotGeometry( radius, tube, tubularSegments, radialSegments, p, q, heightScale ) {\n\n\tGeometry.call( this );\n\n\tthis.type = 'TorusKnotGeometry';\n\n\tthis.parameters = {\n\t\tradius: radius,\n\t\ttube: tube,\n\t\ttubularSegments: tubularSegments,\n\t\tradialSegments: radialSegments,\n\t\tp: p,\n\t\tq: q\n\t};\n\n\tif ( heightScale !== undefined ) console.warn( 'THREE.TorusKnotGeometry: heightScale has been deprecated. Use .scale( x, y, z ) instead.' );\n\n\tthis.fromBufferGeometry( new TorusKnotBufferGeometry( radius, tube, tubularSegments, radialSegments, p, q ) );\n\tthis.mergeVertices();\n\n}\n\nTorusKnotGeometry.prototype = Object.create( Geometry.prototype );\nTorusKnotGeometry.prototype.constructor = TorusKnotGeometry;\n\n// TorusKnotBufferGeometry\n\nfunction TorusKnotBufferGeometry( radius, tube, tubularSegments, radialSegments, p, q ) {\n\n\tBufferGeometry.call( this );\n\n\tthis.type = 'TorusKnotBufferGeometry';\n\n\tthis.parameters = {\n\t\tradius: radius,\n\t\ttube: tube,\n\t\ttubularSegments: tubularSegments,\n\t\tradialSegments: radialSegments,\n\t\tp: p,\n\t\tq: q\n\t};\n\n\tradius = radius || 1;\n\ttube = tube || 0.4;\n\ttubularSegments = Math.floor( tubularSegments ) || 64;\n\tradialSegments = Math.floor( radialSegments ) || 8;\n\tp = p || 2;\n\tq = q || 3;\n\n\t// buffers\n\n\tvar indices = [];\n\tvar vertices = [];\n\tvar normals = [];\n\tvar uvs = [];\n\n\t// helper variables\n\n\tvar i, j;\n\n\tvar vertex = new Vector3();\n\tvar normal = new Vector3();\n\n\tvar P1 = new Vector3();\n\tvar P2 = new Vector3();\n\n\tvar B = new Vector3();\n\tvar T = new Vector3();\n\tvar N = new Vector3();\n\n\t// generate vertices, normals and uvs\n\n\tfor ( i = 0; i <= tubularSegments; ++ i ) {\n\n\t\t// the radian \"u\" is used to calculate the position on the torus curve of the current tubular segement\n\n\t\tvar u = i / tubularSegments * p * Math.PI * 2;\n\n\t\t// now we calculate two points. P1 is our current position on the curve, P2 is a little farther ahead.\n\t\t// these points are used to create a special \"coordinate space\", which is necessary to calculate the correct vertex positions\n\n\t\tcalculatePositionOnCurve( u, p, q, radius, P1 );\n\t\tcalculatePositionOnCurve( u + 0.01, p, q, radius, P2 );\n\n\t\t// calculate orthonormal basis\n\n\t\tT.subVectors( P2, P1 );\n\t\tN.addVectors( P2, P1 );\n\t\tB.crossVectors( T, N );\n\t\tN.crossVectors( B, T );\n\n\t\t// normalize B, N. T can be ignored, we don't use it\n\n\t\tB.normalize();\n\t\tN.normalize();\n\n\t\tfor ( j = 0; j <= radialSegments; ++ j ) {\n\n\t\t\t// now calculate the vertices. they are nothing more than an extrusion of the torus curve.\n\t\t\t// because we extrude a shape in the xy-plane, there is no need to calculate a z-value.\n\n\t\t\tvar v = j / radialSegments * Math.PI * 2;\n\t\t\tvar cx = - tube * Math.cos( v );\n\t\t\tvar cy = tube * Math.sin( v );\n\n\t\t\t// now calculate the final vertex position.\n\t\t\t// first we orient the extrusion with our basis vectos, then we add it to the current position on the curve\n\n\t\t\tvertex.x = P1.x + ( cx * N.x + cy * B.x );\n\t\t\tvertex.y = P1.y + ( cx * N.y + cy * B.y );\n\t\t\tvertex.z = P1.z + ( cx * N.z + cy * B.z );\n\n\t\t\tvertices.push( vertex.x, vertex.y, vertex.z );\n\n\t\t\t// normal (P1 is always the center/origin of the extrusion, thus we can use it to calculate the normal)\n\n\t\t\tnormal.subVectors( vertex, P1 ).normalize();\n\n\t\t\tnormals.push( normal.x, normal.y, normal.z );\n\n\t\t\t// uv\n\n\t\t\tuvs.push( i / tubularSegments );\n\t\t\tuvs.push( j / radialSegments );\n\n\t\t}\n\n\t}\n\n\t// generate indices\n\n\tfor ( j = 1; j <= tubularSegments; j ++ ) {\n\n\t\tfor ( i = 1; i <= radialSegments; i ++ ) {\n\n\t\t\t// indices\n\n\t\t\tvar a = ( radialSegments + 1 ) * ( j - 1 ) + ( i - 1 );\n\t\t\tvar b = ( radialSegments + 1 ) * j + ( i - 1 );\n\t\t\tvar c = ( radialSegments + 1 ) * j + i;\n\t\t\tvar d = ( radialSegments + 1 ) * ( j - 1 ) + i;\n\n\t\t\t// faces\n\n\t\t\tindices.push( a, b, d );\n\t\t\tindices.push( b, c, d );\n\n\t\t}\n\n\t}\n\n\t// build geometry\n\n\tthis.setIndex( indices );\n\tthis.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\tthis.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );\n\tthis.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );\n\n\t// this function calculates the current position on the torus curve\n\n\tfunction calculatePositionOnCurve( u, p, q, radius, position ) {\n\n\t\tvar cu = Math.cos( u );\n\t\tvar su = Math.sin( u );\n\t\tvar quOverP = q / p * u;\n\t\tvar cs = Math.cos( quOverP );\n\n\t\tposition.x = radius * ( 2 + cs ) * 0.5 * cu;\n\t\tposition.y = radius * ( 2 + cs ) * su * 0.5;\n\t\tposition.z = radius * Math.sin( quOverP ) * 0.5;\n\n\t}\n\n}\n\nTorusKnotBufferGeometry.prototype = Object.create( BufferGeometry.prototype );\nTorusKnotBufferGeometry.prototype.constructor = TorusKnotBufferGeometry;\n\n/**\n * @author oosmoxiecode\n * @author mrdoob / http://mrdoob.com/\n * @author Mugen87 / https://github.com/Mugen87\n */\n\n// TorusGeometry\n\nfunction TorusGeometry( radius, tube, radialSegments, tubularSegments, arc ) {\n\n\tGeometry.call( this );\n\n\tthis.type = 'TorusGeometry';\n\n\tthis.parameters = {\n\t\tradius: radius,\n\t\ttube: tube,\n\t\tradialSegments: radialSegments,\n\t\ttubularSegments: tubularSegments,\n\t\tarc: arc\n\t};\n\n\tthis.fromBufferGeometry( new TorusBufferGeometry( radius, tube, radialSegments, tubularSegments, arc ) );\n\tthis.mergeVertices();\n\n}\n\nTorusGeometry.prototype = Object.create( Geometry.prototype );\nTorusGeometry.prototype.constructor = TorusGeometry;\n\n// TorusBufferGeometry\n\nfunction TorusBufferGeometry( radius, tube, radialSegments, tubularSegments, arc ) {\n\n\tBufferGeometry.call( this );\n\n\tthis.type = 'TorusBufferGeometry';\n\n\tthis.parameters = {\n\t\tradius: radius,\n\t\ttube: tube,\n\t\tradialSegments: radialSegments,\n\t\ttubularSegments: tubularSegments,\n\t\tarc: arc\n\t};\n\n\tradius = radius || 1;\n\ttube = tube || 0.4;\n\tradialSegments = Math.floor( radialSegments ) || 8;\n\ttubularSegments = Math.floor( tubularSegments ) || 6;\n\tarc = arc || Math.PI * 2;\n\n\t// buffers\n\n\tvar indices = [];\n\tvar vertices = [];\n\tvar normals = [];\n\tvar uvs = [];\n\n\t// helper variables\n\n\tvar center = new Vector3();\n\tvar vertex = new Vector3();\n\tvar normal = new Vector3();\n\n\tvar j, i;\n\n\t// generate vertices, normals and uvs\n\n\tfor ( j = 0; j <= radialSegments; j ++ ) {\n\n\t\tfor ( i = 0; i <= tubularSegments; i ++ ) {\n\n\t\t\tvar u = i / tubularSegments * arc;\n\t\t\tvar v = j / radialSegments * Math.PI * 2;\n\n\t\t\t// vertex\n\n\t\t\tvertex.x = ( radius + tube * Math.cos( v ) ) * Math.cos( u );\n\t\t\tvertex.y = ( radius + tube * Math.cos( v ) ) * Math.sin( u );\n\t\t\tvertex.z = tube * Math.sin( v );\n\n\t\t\tvertices.push( vertex.x, vertex.y, vertex.z );\n\n\t\t\t// normal\n\n\t\t\tcenter.x = radius * Math.cos( u );\n\t\t\tcenter.y = radius * Math.sin( u );\n\t\t\tnormal.subVectors( vertex, center ).normalize();\n\n\t\t\tnormals.push( normal.x, normal.y, normal.z );\n\n\t\t\t// uv\n\n\t\t\tuvs.push( i / tubularSegments );\n\t\t\tuvs.push( j / radialSegments );\n\n\t\t}\n\n\t}\n\n\t// generate indices\n\n\tfor ( j = 1; j <= radialSegments; j ++ ) {\n\n\t\tfor ( i = 1; i <= tubularSegments; i ++ ) {\n\n\t\t\t// indices\n\n\t\t\tvar a = ( tubularSegments + 1 ) * j + i - 1;\n\t\t\tvar b = ( tubularSegments + 1 ) * ( j - 1 ) + i - 1;\n\t\t\tvar c = ( tubularSegments + 1 ) * ( j - 1 ) + i;\n\t\t\tvar d = ( tubularSegments + 1 ) * j + i;\n\n\t\t\t// faces\n\n\t\t\tindices.push( a, b, d );\n\t\t\tindices.push( b, c, d );\n\n\t\t}\n\n\t}\n\n\t// build geometry\n\n\tthis.setIndex( indices );\n\tthis.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\tthis.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );\n\tthis.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );\n\n}\n\nTorusBufferGeometry.prototype = Object.create( BufferGeometry.prototype );\nTorusBufferGeometry.prototype.constructor = TorusBufferGeometry;\n\n/**\n * @author Mugen87 / https://github.com/Mugen87\n * Port from https://github.com/mapbox/earcut (v2.1.5)\n */\n\nvar Earcut = {\n\n\ttriangulate: function ( data, holeIndices, dim ) {\n\n\t\tdim = dim || 2;\n\n\t\tvar hasHoles = holeIndices && holeIndices.length,\n\t\t\touterLen = hasHoles ? holeIndices[ 0 ] * dim : data.length,\n\t\t\touterNode = linkedList( data, 0, outerLen, dim, true ),\n\t\t\ttriangles = [];\n\n\t\tif ( ! outerNode || outerNode.next === outerNode.prev ) return triangles;\n\n\t\tvar minX, minY, maxX, maxY, x, y, invSize;\n\n\t\tif ( hasHoles ) outerNode = eliminateHoles( data, holeIndices, outerNode, dim );\n\n\t\t// if the shape is not too simple, we'll use z-order curve hash later; calculate polygon bbox\n\t\tif ( data.length > 80 * dim ) {\n\n\t\t\tminX = maxX = data[ 0 ];\n\t\t\tminY = maxY = data[ 1 ];\n\n\t\t\tfor ( var i = dim; i < outerLen; i += dim ) {\n\n\t\t\t\tx = data[ i ];\n\t\t\t\ty = data[ i + 1 ];\n\t\t\t\tif ( x < minX ) minX = x;\n\t\t\t\tif ( y < minY ) minY = y;\n\t\t\t\tif ( x > maxX ) maxX = x;\n\t\t\t\tif ( y > maxY ) maxY = y;\n\n\t\t\t}\n\n\t\t\t// minX, minY and invSize are later used to transform coords into integers for z-order calculation\n\t\t\tinvSize = Math.max( maxX - minX, maxY - minY );\n\t\t\tinvSize = invSize !== 0 ? 1 / invSize : 0;\n\n\t\t}\n\n\t\tearcutLinked( outerNode, triangles, dim, minX, minY, invSize );\n\n\t\treturn triangles;\n\n\t}\n\n};\n\n// create a circular doubly linked list from polygon points in the specified winding order\nfunction linkedList( data, start, end, dim, clockwise ) {\n\n\tvar i, last;\n\n\tif ( clockwise === ( signedArea( data, start, end, dim ) > 0 ) ) {\n\n\t\tfor ( i = start; i < end; i += dim ) last = insertNode( i, data[ i ], data[ i + 1 ], last );\n\n\t} else {\n\n\t\tfor ( i = end - dim; i >= start; i -= dim ) last = insertNode( i, data[ i ], data[ i + 1 ], last );\n\n\t}\n\n\tif ( last && equals( last, last.next ) ) {\n\n\t\tremoveNode( last );\n\t\tlast = last.next;\n\n\t}\n\n\treturn last;\n\n}\n\n// eliminate colinear or duplicate points\nfunction filterPoints( start, end ) {\n\n\tif ( ! start ) return start;\n\tif ( ! end ) end = start;\n\n\tvar p = start,\n\t\tagain;\n\tdo {\n\n\t\tagain = false;\n\n\t\tif ( ! p.steiner && ( equals( p, p.next ) || area( p.prev, p, p.next ) === 0 ) ) {\n\n\t\t\tremoveNode( p );\n\t\t\tp = end = p.prev;\n\t\t\tif ( p === p.next ) break;\n\t\t\tagain = true;\n\n\t\t} else {\n\n\t\t\tp = p.next;\n\n\t\t}\n\n\t} while ( again || p !== end );\n\n\treturn end;\n\n}\n\n// main ear slicing loop which triangulates a polygon (given as a linked list)\nfunction earcutLinked( ear, triangles, dim, minX, minY, invSize, pass ) {\n\n\tif ( ! ear ) return;\n\n\t// interlink polygon nodes in z-order\n\tif ( ! pass && invSize ) indexCurve( ear, minX, minY, invSize );\n\n\tvar stop = ear,\n\t\tprev, next;\n\n\t// iterate through ears, slicing them one by one\n\twhile ( ear.prev !== ear.next ) {\n\n\t\tprev = ear.prev;\n\t\tnext = ear.next;\n\n\t\tif ( invSize ? isEarHashed( ear, minX, minY, invSize ) : isEar( ear ) ) {\n\n\t\t\t// cut off the triangle\n\t\t\ttriangles.push( prev.i / dim );\n\t\t\ttriangles.push( ear.i / dim );\n\t\t\ttriangles.push( next.i / dim );\n\n\t\t\tremoveNode( ear );\n\n\t\t\t// skipping the next vertex leads to less sliver triangles\n\t\t\tear = next.next;\n\t\t\tstop = next.next;\n\n\t\t\tcontinue;\n\n\t\t}\n\n\t\tear = next;\n\n\t\t// if we looped through the whole remaining polygon and can't find any more ears\n\t\tif ( ear === stop ) {\n\n\t\t\t// try filtering points and slicing again\n\t\t\tif ( ! pass ) {\n\n\t\t\t\tearcutLinked( filterPoints( ear ), triangles, dim, minX, minY, invSize, 1 );\n\n\t\t\t\t// if this didn't work, try curing all small self-intersections locally\n\n\t\t\t} else if ( pass === 1 ) {\n\n\t\t\t\tear = cureLocalIntersections( ear, triangles, dim );\n\t\t\t\tearcutLinked( ear, triangles, dim, minX, minY, invSize, 2 );\n\n\t\t\t\t// as a last resort, try splitting the remaining polygon into two\n\n\t\t\t} else if ( pass === 2 ) {\n\n\t\t\t\tsplitEarcut( ear, triangles, dim, minX, minY, invSize );\n\n\t\t\t}\n\n\t\t\tbreak;\n\n\t\t}\n\n\t}\n\n}\n\n// check whether a polygon node forms a valid ear with adjacent nodes\nfunction isEar( ear ) {\n\n\tvar a = ear.prev,\n\t\tb = ear,\n\t\tc = ear.next;\n\n\tif ( area( a, b, c ) >= 0 ) return false; // reflex, can't be an ear\n\n\t// now make sure we don't have other points inside the potential ear\n\tvar p = ear.next.next;\n\n\twhile ( p !== ear.prev ) {\n\n\t\tif ( pointInTriangle( a.x, a.y, b.x, b.y, c.x, c.y, p.x, p.y ) &&\n\t\t\tarea( p.prev, p, p.next ) >= 0 ) return false;\n\t\tp = p.next;\n\n\t}\n\n\treturn true;\n\n}\n\nfunction isEarHashed( ear, minX, minY, invSize ) {\n\n\tvar a = ear.prev,\n\t\tb = ear,\n\t\tc = ear.next;\n\n\tif ( area( a, b, c ) >= 0 ) return false; // reflex, can't be an ear\n\n\t// triangle bbox; min & max are calculated like this for speed\n\tvar minTX = a.x < b.x ? ( a.x < c.x ? a.x : c.x ) : ( b.x < c.x ? b.x : c.x ),\n\t\tminTY = a.y < b.y ? ( a.y < c.y ? a.y : c.y ) : ( b.y < c.y ? b.y : c.y ),\n\t\tmaxTX = a.x > b.x ? ( a.x > c.x ? a.x : c.x ) : ( b.x > c.x ? b.x : c.x ),\n\t\tmaxTY = a.y > b.y ? ( a.y > c.y ? a.y : c.y ) : ( b.y > c.y ? b.y : c.y );\n\n\t// z-order range for the current triangle bbox;\n\tvar minZ = zOrder( minTX, minTY, minX, minY, invSize ),\n\t\tmaxZ = zOrder( maxTX, maxTY, minX, minY, invSize );\n\n\tvar p = ear.prevZ,\n\t\tn = ear.nextZ;\n\n\t// look for points inside the triangle in both directions\n\twhile ( p && p.z >= minZ && n && n.z <= maxZ ) {\n\n\t\tif ( p !== ear.prev && p !== ear.next &&\n\t\t\tpointInTriangle( a.x, a.y, b.x, b.y, c.x, c.y, p.x, p.y ) &&\n\t\t\tarea( p.prev, p, p.next ) >= 0 ) return false;\n\t\tp = p.prevZ;\n\n\t\tif ( n !== ear.prev && n !== ear.next &&\n\t\t\tpointInTriangle( a.x, a.y, b.x, b.y, c.x, c.y, n.x, n.y ) &&\n\t\t\tarea( n.prev, n, n.next ) >= 0 ) return false;\n\t\tn = n.nextZ;\n\n\t}\n\n\t// look for remaining points in decreasing z-order\n\twhile ( p && p.z >= minZ ) {\n\n\t\tif ( p !== ear.prev && p !== ear.next &&\n\t\t\tpointInTriangle( a.x, a.y, b.x, b.y, c.x, c.y, p.x, p.y ) &&\n\t\t\tarea( p.prev, p, p.next ) >= 0 ) return false;\n\t\tp = p.prevZ;\n\n\t}\n\n\t// look for remaining points in increasing z-order\n\twhile ( n && n.z <= maxZ ) {\n\n\t\tif ( n !== ear.prev && n !== ear.next &&\n\t\t\tpointInTriangle( a.x, a.y, b.x, b.y, c.x, c.y, n.x, n.y ) &&\n\t\t\tarea( n.prev, n, n.next ) >= 0 ) return false;\n\t\tn = n.nextZ;\n\n\t}\n\n\treturn true;\n\n}\n\n// go through all polygon nodes and cure small local self-intersections\nfunction cureLocalIntersections( start, triangles, dim ) {\n\n\tvar p = start;\n\tdo {\n\n\t\tvar a = p.prev,\n\t\t\tb = p.next.next;\n\n\t\tif ( ! equals( a, b ) && intersects( a, p, p.next, b ) && locallyInside( a, b ) && locallyInside( b, a ) ) {\n\n\t\t\ttriangles.push( a.i / dim );\n\t\t\ttriangles.push( p.i / dim );\n\t\t\ttriangles.push( b.i / dim );\n\n\t\t\t// remove two nodes involved\n\t\t\tremoveNode( p );\n\t\t\tremoveNode( p.next );\n\n\t\t\tp = start = b;\n\n\t\t}\n\n\t\tp = p.next;\n\n\t} while ( p !== start );\n\n\treturn p;\n\n}\n\n// try splitting polygon into two and triangulate them independently\nfunction splitEarcut( start, triangles, dim, minX, minY, invSize ) {\n\n\t// look for a valid diagonal that divides the polygon into two\n\tvar a = start;\n\tdo {\n\n\t\tvar b = a.next.next;\n\t\twhile ( b !== a.prev ) {\n\n\t\t\tif ( a.i !== b.i && isValidDiagonal( a, b ) ) {\n\n\t\t\t\t// split the polygon in two by the diagonal\n\t\t\t\tvar c = splitPolygon( a, b );\n\n\t\t\t\t// filter colinear points around the cuts\n\t\t\t\ta = filterPoints( a, a.next );\n\t\t\t\tc = filterPoints( c, c.next );\n\n\t\t\t\t// run earcut on each half\n\t\t\t\tearcutLinked( a, triangles, dim, minX, minY, invSize );\n\t\t\t\tearcutLinked( c, triangles, dim, minX, minY, invSize );\n\t\t\t\treturn;\n\n\t\t\t}\n\n\t\t\tb = b.next;\n\n\t\t}\n\n\t\ta = a.next;\n\n\t} while ( a !== start );\n\n}\n\n// link every hole into the outer loop, producing a single-ring polygon without holes\nfunction eliminateHoles( data, holeIndices, outerNode, dim ) {\n\n\tvar queue = [],\n\t\ti, len, start, end, list;\n\n\tfor ( i = 0, len = holeIndices.length; i < len; i ++ ) {\n\n\t\tstart = holeIndices[ i ] * dim;\n\t\tend = i < len - 1 ? holeIndices[ i + 1 ] * dim : data.length;\n\t\tlist = linkedList( data, start, end, dim, false );\n\t\tif ( list === list.next ) list.steiner = true;\n\t\tqueue.push( getLeftmost( list ) );\n\n\t}\n\n\tqueue.sort( compareX );\n\n\t// process holes from left to right\n\tfor ( i = 0; i < queue.length; i ++ ) {\n\n\t\teliminateHole( queue[ i ], outerNode );\n\t\touterNode = filterPoints( outerNode, outerNode.next );\n\n\t}\n\n\treturn outerNode;\n\n}\n\nfunction compareX( a, b ) {\n\n\treturn a.x - b.x;\n\n}\n\n// find a bridge between vertices that connects hole with an outer ring and and link it\nfunction eliminateHole( hole, outerNode ) {\n\n\touterNode = findHoleBridge( hole, outerNode );\n\tif ( outerNode ) {\n\n\t\tvar b = splitPolygon( outerNode, hole );\n\t\tfilterPoints( b, b.next );\n\n\t}\n\n}\n\n// David Eberly's algorithm for finding a bridge between hole and outer polygon\nfunction findHoleBridge( hole, outerNode ) {\n\n\tvar p = outerNode,\n\t\thx = hole.x,\n\t\thy = hole.y,\n\t\tqx = - Infinity,\n\t\tm;\n\n\t// find a segment intersected by a ray from the hole's leftmost point to the left;\n\t// segment's endpoint with lesser x will be potential connection point\n\tdo {\n\n\t\tif ( hy <= p.y && hy >= p.next.y && p.next.y !== p.y ) {\n\n\t\t\tvar x = p.x + ( hy - p.y ) * ( p.next.x - p.x ) / ( p.next.y - p.y );\n\t\t\tif ( x <= hx && x > qx ) {\n\n\t\t\t\tqx = x;\n\t\t\t\tif ( x === hx ) {\n\n\t\t\t\t\tif ( hy === p.y ) return p;\n\t\t\t\t\tif ( hy === p.next.y ) return p.next;\n\n\t\t\t\t}\n\n\t\t\t\tm = p.x < p.next.x ? p : p.next;\n\n\t\t\t}\n\n\t\t}\n\n\t\tp = p.next;\n\n\t} while ( p !== outerNode );\n\n\tif ( ! m ) return null;\n\n\tif ( hx === qx ) return m.prev; // hole touches outer segment; pick lower endpoint\n\n\t// look for points inside the triangle of hole point, segment intersection and endpoint;\n\t// if there are no points found, we have a valid connection;\n\t// otherwise choose the point of the minimum angle with the ray as connection point\n\n\tvar stop = m,\n\t\tmx = m.x,\n\t\tmy = m.y,\n\t\ttanMin = Infinity,\n\t\ttan;\n\n\tp = m.next;\n\n\twhile ( p !== stop ) {\n\n\t\tif ( hx >= p.x && p.x >= mx && hx !== p.x &&\n\t\t\t\tpointInTriangle( hy < my ? hx : qx, hy, mx, my, hy < my ? qx : hx, hy, p.x, p.y ) ) {\n\n\t\t\ttan = Math.abs( hy - p.y ) / ( hx - p.x ); // tangential\n\n\t\t\tif ( ( tan < tanMin || ( tan === tanMin && p.x > m.x ) ) && locallyInside( p, hole ) ) {\n\n\t\t\t\tm = p;\n\t\t\t\ttanMin = tan;\n\n\t\t\t}\n\n\t\t}\n\n\t\tp = p.next;\n\n\t}\n\n\treturn m;\n\n}\n\n// interlink polygon nodes in z-order\nfunction indexCurve( start, minX, minY, invSize ) {\n\n\tvar p = start;\n\tdo {\n\n\t\tif ( p.z === null ) p.z = zOrder( p.x, p.y, minX, minY, invSize );\n\t\tp.prevZ = p.prev;\n\t\tp.nextZ = p.next;\n\t\tp = p.next;\n\n\t} while ( p !== start );\n\n\tp.prevZ.nextZ = null;\n\tp.prevZ = null;\n\n\tsortLinked( p );\n\n}\n\n// Simon Tatham's linked list merge sort algorithm\n// http://www.chiark.greenend.org.uk/~sgtatham/algorithms/listsort.html\nfunction sortLinked( list ) {\n\n\tvar i, p, q, e, tail, numMerges, pSize, qSize,\n\t\tinSize = 1;\n\n\tdo {\n\n\t\tp = list;\n\t\tlist = null;\n\t\ttail = null;\n\t\tnumMerges = 0;\n\n\t\twhile ( p ) {\n\n\t\t\tnumMerges ++;\n\t\t\tq = p;\n\t\t\tpSize = 0;\n\t\t\tfor ( i = 0; i < inSize; i ++ ) {\n\n\t\t\t\tpSize ++;\n\t\t\t\tq = q.nextZ;\n\t\t\t\tif ( ! q ) break;\n\n\t\t\t}\n\n\t\t\tqSize = inSize;\n\n\t\t\twhile ( pSize > 0 || ( qSize > 0 && q ) ) {\n\n\t\t\t\tif ( pSize !== 0 && ( qSize === 0 || ! q || p.z <= q.z ) ) {\n\n\t\t\t\t\te = p;\n\t\t\t\t\tp = p.nextZ;\n\t\t\t\t\tpSize --;\n\n\t\t\t\t} else {\n\n\t\t\t\t\te = q;\n\t\t\t\t\tq = q.nextZ;\n\t\t\t\t\tqSize --;\n\n\t\t\t\t}\n\n\t\t\t\tif ( tail ) tail.nextZ = e;\n\t\t\t\telse list = e;\n\n\t\t\t\te.prevZ = tail;\n\t\t\t\ttail = e;\n\n\t\t\t}\n\n\t\t\tp = q;\n\n\t\t}\n\n\t\ttail.nextZ = null;\n\t\tinSize *= 2;\n\n\t} while ( numMerges > 1 );\n\n\treturn list;\n\n}\n\n// z-order of a point given coords and inverse of the longer side of data bbox\nfunction zOrder( x, y, minX, minY, invSize ) {\n\n\t// coords are transformed into non-negative 15-bit integer range\n\tx = 32767 * ( x - minX ) * invSize;\n\ty = 32767 * ( y - minY ) * invSize;\n\n\tx = ( x | ( x << 8 ) ) & 0x00FF00FF;\n\tx = ( x | ( x << 4 ) ) & 0x0F0F0F0F;\n\tx = ( x | ( x << 2 ) ) & 0x33333333;\n\tx = ( x | ( x << 1 ) ) & 0x55555555;\n\n\ty = ( y | ( y << 8 ) ) & 0x00FF00FF;\n\ty = ( y | ( y << 4 ) ) & 0x0F0F0F0F;\n\ty = ( y | ( y << 2 ) ) & 0x33333333;\n\ty = ( y | ( y << 1 ) ) & 0x55555555;\n\n\treturn x | ( y << 1 );\n\n}\n\n// find the leftmost node of a polygon ring\nfunction getLeftmost( start ) {\n\n\tvar p = start,\n\t\tleftmost = start;\n\tdo {\n\n\t\tif ( p.x < leftmost.x || ( p.x === leftmost.x && p.y < leftmost.y ) ) leftmost = p;\n\t\tp = p.next;\n\n\t} while ( p !== start );\n\n\treturn leftmost;\n\n}\n\n// check if a point lies within a convex triangle\nfunction pointInTriangle( ax, ay, bx, by, cx, cy, px, py ) {\n\n\treturn ( cx - px ) * ( ay - py ) - ( ax - px ) * ( cy - py ) >= 0 &&\n\t\t   ( ax - px ) * ( by - py ) - ( bx - px ) * ( ay - py ) >= 0 &&\n\t\t   ( bx - px ) * ( cy - py ) - ( cx - px ) * ( by - py ) >= 0;\n\n}\n\n// check if a diagonal between two polygon nodes is valid (lies in polygon interior)\nfunction isValidDiagonal( a, b ) {\n\n\treturn a.next.i !== b.i && a.prev.i !== b.i && ! intersectsPolygon( a, b ) &&\n\t\t   locallyInside( a, b ) && locallyInside( b, a ) && middleInside( a, b );\n\n}\n\n// signed area of a triangle\nfunction area( p, q, r ) {\n\n\treturn ( q.y - p.y ) * ( r.x - q.x ) - ( q.x - p.x ) * ( r.y - q.y );\n\n}\n\n// check if two points are equal\nfunction equals( p1, p2 ) {\n\n\treturn p1.x === p2.x && p1.y === p2.y;\n\n}\n\n// check if two segments intersect\nfunction intersects( p1, q1, p2, q2 ) {\n\n\tif ( ( equals( p1, p2 ) && equals( q1, q2 ) ) ||\n\t\t( equals( p1, q2 ) && equals( p2, q1 ) ) ) return true;\n\treturn area( p1, q1, p2 ) > 0 !== area( p1, q1, q2 ) > 0 &&\n\t\t   area( p2, q2, p1 ) > 0 !== area( p2, q2, q1 ) > 0;\n\n}\n\n// check if a polygon diagonal intersects any polygon segments\nfunction intersectsPolygon( a, b ) {\n\n\tvar p = a;\n\tdo {\n\n\t\tif ( p.i !== a.i && p.next.i !== a.i && p.i !== b.i && p.next.i !== b.i &&\n\t\t\t\tintersects( p, p.next, a, b ) ) return true;\n\t\tp = p.next;\n\n\t} while ( p !== a );\n\n\treturn false;\n\n}\n\n// check if a polygon diagonal is locally inside the polygon\nfunction locallyInside( a, b ) {\n\n\treturn area( a.prev, a, a.next ) < 0 ?\n\t\tarea( a, b, a.next ) >= 0 && area( a, a.prev, b ) >= 0 :\n\t\tarea( a, b, a.prev ) < 0 || area( a, a.next, b ) < 0;\n\n}\n\n// check if the middle point of a polygon diagonal is inside the polygon\nfunction middleInside( a, b ) {\n\n\tvar p = a,\n\t\tinside = false,\n\t\tpx = ( a.x + b.x ) / 2,\n\t\tpy = ( a.y + b.y ) / 2;\n\tdo {\n\n\t\tif ( ( ( p.y > py ) !== ( p.next.y > py ) ) && p.next.y !== p.y &&\n\t\t\t\t( px < ( p.next.x - p.x ) * ( py - p.y ) / ( p.next.y - p.y ) + p.x ) )\n\t\t\tinside = ! inside;\n\t\tp = p.next;\n\n\t} while ( p !== a );\n\n\treturn inside;\n\n}\n\n// link two polygon vertices with a bridge; if the vertices belong to the same ring, it splits polygon into two;\n// if one belongs to the outer ring and another to a hole, it merges it into a single ring\nfunction splitPolygon( a, b ) {\n\n\tvar a2 = new Node( a.i, a.x, a.y ),\n\t\tb2 = new Node( b.i, b.x, b.y ),\n\t\tan = a.next,\n\t\tbp = b.prev;\n\n\ta.next = b;\n\tb.prev = a;\n\n\ta2.next = an;\n\tan.prev = a2;\n\n\tb2.next = a2;\n\ta2.prev = b2;\n\n\tbp.next = b2;\n\tb2.prev = bp;\n\n\treturn b2;\n\n}\n\n// create a node and optionally link it with previous one (in a circular doubly linked list)\nfunction insertNode( i, x, y, last ) {\n\n\tvar p = new Node( i, x, y );\n\n\tif ( ! last ) {\n\n\t\tp.prev = p;\n\t\tp.next = p;\n\n\t} else {\n\n\t\tp.next = last.next;\n\t\tp.prev = last;\n\t\tlast.next.prev = p;\n\t\tlast.next = p;\n\n\t}\n\n\treturn p;\n\n}\n\nfunction removeNode( p ) {\n\n\tp.next.prev = p.prev;\n\tp.prev.next = p.next;\n\n\tif ( p.prevZ ) p.prevZ.nextZ = p.nextZ;\n\tif ( p.nextZ ) p.nextZ.prevZ = p.prevZ;\n\n}\n\nfunction Node( i, x, y ) {\n\n\t// vertex index in coordinates array\n\tthis.i = i;\n\n\t// vertex coordinates\n\tthis.x = x;\n\tthis.y = y;\n\n\t// previous and next vertex nodes in a polygon ring\n\tthis.prev = null;\n\tthis.next = null;\n\n\t// z-order curve value\n\tthis.z = null;\n\n\t// previous and next nodes in z-order\n\tthis.prevZ = null;\n\tthis.nextZ = null;\n\n\t// indicates whether this is a steiner point\n\tthis.steiner = false;\n\n}\n\nfunction signedArea( data, start, end, dim ) {\n\n\tvar sum = 0;\n\tfor ( var i = start, j = end - dim; i < end; i += dim ) {\n\n\t\tsum += ( data[ j ] - data[ i ] ) * ( data[ i + 1 ] + data[ j + 1 ] );\n\t\tj = i;\n\n\t}\n\n\treturn sum;\n\n}\n\n/**\n * @author zz85 / http://www.lab4games.net/zz85/blog\n */\n\nvar ShapeUtils = {\n\n\t// calculate area of the contour polygon\n\n\tarea: function ( contour ) {\n\n\t\tvar n = contour.length;\n\t\tvar a = 0.0;\n\n\t\tfor ( var p = n - 1, q = 0; q < n; p = q ++ ) {\n\n\t\t\ta += contour[ p ].x * contour[ q ].y - contour[ q ].x * contour[ p ].y;\n\n\t\t}\n\n\t\treturn a * 0.5;\n\n\t},\n\n\tisClockWise: function ( pts ) {\n\n\t\treturn ShapeUtils.area( pts ) < 0;\n\n\t},\n\n\ttriangulateShape: function ( contour, holes ) {\n\n\t\tvar vertices = []; // flat array of vertices like [ x0,y0, x1,y1, x2,y2, ... ]\n\t\tvar holeIndices = []; // array of hole indices\n\t\tvar faces = []; // final array of vertex indices like [ [ a,b,d ], [ b,c,d ] ]\n\n\t\tremoveDupEndPts( contour );\n\t\taddContour( vertices, contour );\n\n\t\t//\n\n\t\tvar holeIndex = contour.length;\n\n\t\tholes.forEach( removeDupEndPts );\n\n\t\tfor ( var i = 0; i < holes.length; i ++ ) {\n\n\t\t\tholeIndices.push( holeIndex );\n\t\t\tholeIndex += holes[ i ].length;\n\t\t\taddContour( vertices, holes[ i ] );\n\n\t\t}\n\n\t\t//\n\n\t\tvar triangles = Earcut.triangulate( vertices, holeIndices );\n\n\t\t//\n\n\t\tfor ( var i = 0; i < triangles.length; i += 3 ) {\n\n\t\t\tfaces.push( triangles.slice( i, i + 3 ) );\n\n\t\t}\n\n\t\treturn faces;\n\n\t}\n\n};\n\nfunction removeDupEndPts( points ) {\n\n\tvar l = points.length;\n\n\tif ( l > 2 && points[ l - 1 ].equals( points[ 0 ] ) ) {\n\n\t\tpoints.pop();\n\n\t}\n\n}\n\nfunction addContour( vertices, contour ) {\n\n\tfor ( var i = 0; i < contour.length; i ++ ) {\n\n\t\tvertices.push( contour[ i ].x );\n\t\tvertices.push( contour[ i ].y );\n\n\t}\n\n}\n\n/**\n * @author zz85 / http://www.lab4games.net/zz85/blog\n *\n * Creates extruded geometry from a path shape.\n *\n * parameters = {\n *\n *  curveSegments: <int>, // number of points on the curves\n *  steps: <int>, // number of points for z-side extrusions / used for subdividing segments of extrude spline too\n *  depth: <float>, // Depth to extrude the shape\n *\n *  bevelEnabled: <bool>, // turn on bevel\n *  bevelThickness: <float>, // how deep into the original shape bevel goes\n *  bevelSize: <float>, // how far from shape outline (including bevelOffset) is bevel\n *  bevelOffset: <float>, // how far from shape outline does bevel start\n *  bevelSegments: <int>, // number of bevel layers\n *\n *  extrudePath: <THREE.Curve> // curve to extrude shape along\n *\n *  UVGenerator: <Object> // object that provides UV generator functions\n *\n * }\n */\n\n// ExtrudeGeometry\n\nfunction ExtrudeGeometry( shapes, options ) {\n\n\tGeometry.call( this );\n\n\tthis.type = 'ExtrudeGeometry';\n\n\tthis.parameters = {\n\t\tshapes: shapes,\n\t\toptions: options\n\t};\n\n\tthis.fromBufferGeometry( new ExtrudeBufferGeometry( shapes, options ) );\n\tthis.mergeVertices();\n\n}\n\nExtrudeGeometry.prototype = Object.create( Geometry.prototype );\nExtrudeGeometry.prototype.constructor = ExtrudeGeometry;\n\nExtrudeGeometry.prototype.toJSON = function () {\n\n\tvar data = Geometry.prototype.toJSON.call( this );\n\n\tvar shapes = this.parameters.shapes;\n\tvar options = this.parameters.options;\n\n\treturn toJSON( shapes, options, data );\n\n};\n\n// ExtrudeBufferGeometry\n\nfunction ExtrudeBufferGeometry( shapes, options ) {\n\n\tBufferGeometry.call( this );\n\n\tthis.type = 'ExtrudeBufferGeometry';\n\n\tthis.parameters = {\n\t\tshapes: shapes,\n\t\toptions: options\n\t};\n\n\tshapes = Array.isArray( shapes ) ? shapes : [ shapes ];\n\n\tvar scope = this;\n\n\tvar verticesArray = [];\n\tvar uvArray = [];\n\n\tfor ( var i = 0, l = shapes.length; i < l; i ++ ) {\n\n\t\tvar shape = shapes[ i ];\n\t\taddShape( shape );\n\n\t}\n\n\t// build geometry\n\n\tthis.setAttribute( 'position', new Float32BufferAttribute( verticesArray, 3 ) );\n\tthis.setAttribute( 'uv', new Float32BufferAttribute( uvArray, 2 ) );\n\n\tthis.computeVertexNormals();\n\n\t// functions\n\n\tfunction addShape( shape ) {\n\n\t\tvar placeholder = [];\n\n\t\t// options\n\n\t\tvar curveSegments = options.curveSegments !== undefined ? options.curveSegments : 12;\n\t\tvar steps = options.steps !== undefined ? options.steps : 1;\n\t\tvar depth = options.depth !== undefined ? options.depth : 100;\n\n\t\tvar bevelEnabled = options.bevelEnabled !== undefined ? options.bevelEnabled : true;\n\t\tvar bevelThickness = options.bevelThickness !== undefined ? options.bevelThickness : 6;\n\t\tvar bevelSize = options.bevelSize !== undefined ? options.bevelSize : bevelThickness - 2;\n\t\tvar bevelOffset = options.bevelOffset !== undefined ? options.bevelOffset : 0;\n\t\tvar bevelSegments = options.bevelSegments !== undefined ? options.bevelSegments : 3;\n\n\t\tvar extrudePath = options.extrudePath;\n\n\t\tvar uvgen = options.UVGenerator !== undefined ? options.UVGenerator : WorldUVGenerator;\n\n\t\t// deprecated options\n\n\t\tif ( options.amount !== undefined ) {\n\n\t\t\tconsole.warn( 'THREE.ExtrudeBufferGeometry: amount has been renamed to depth.' );\n\t\t\tdepth = options.amount;\n\n\t\t}\n\n\t\t//\n\n\t\tvar extrudePts, extrudeByPath = false;\n\t\tvar splineTube, binormal, normal, position2;\n\n\t\tif ( extrudePath ) {\n\n\t\t\textrudePts = extrudePath.getSpacedPoints( steps );\n\n\t\t\textrudeByPath = true;\n\t\t\tbevelEnabled = false; // bevels not supported for path extrusion\n\n\t\t\t// SETUP TNB variables\n\n\t\t\t// TODO1 - have a .isClosed in spline?\n\n\t\t\tsplineTube = extrudePath.computeFrenetFrames( steps, false );\n\n\t\t\t// console.log(splineTube, 'splineTube', splineTube.normals.length, 'steps', steps, 'extrudePts', extrudePts.length);\n\n\t\t\tbinormal = new Vector3();\n\t\t\tnormal = new Vector3();\n\t\t\tposition2 = new Vector3();\n\n\t\t}\n\n\t\t// Safeguards if bevels are not enabled\n\n\t\tif ( ! bevelEnabled ) {\n\n\t\t\tbevelSegments = 0;\n\t\t\tbevelThickness = 0;\n\t\t\tbevelSize = 0;\n\t\t\tbevelOffset = 0;\n\n\t\t}\n\n\t\t// Variables initialization\n\n\t\tvar ahole, h, hl; // looping of holes\n\n\t\tvar shapePoints = shape.extractPoints( curveSegments );\n\n\t\tvar vertices = shapePoints.shape;\n\t\tvar holes = shapePoints.holes;\n\n\t\tvar reverse = ! ShapeUtils.isClockWise( vertices );\n\n\t\tif ( reverse ) {\n\n\t\t\tvertices = vertices.reverse();\n\n\t\t\t// Maybe we should also check if holes are in the opposite direction, just to be safe ...\n\n\t\t\tfor ( h = 0, hl = holes.length; h < hl; h ++ ) {\n\n\t\t\t\tahole = holes[ h ];\n\n\t\t\t\tif ( ShapeUtils.isClockWise( ahole ) ) {\n\n\t\t\t\t\tholes[ h ] = ahole.reverse();\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\n\t\tvar faces = ShapeUtils.triangulateShape( vertices, holes );\n\n\t\t/* Vertices */\n\n\t\tvar contour = vertices; // vertices has all points but contour has only points of circumference\n\n\t\tfor ( h = 0, hl = holes.length; h < hl; h ++ ) {\n\n\t\t\tahole = holes[ h ];\n\n\t\t\tvertices = vertices.concat( ahole );\n\n\t\t}\n\n\n\t\tfunction scalePt2( pt, vec, size ) {\n\n\t\t\tif ( ! vec ) console.error( \"THREE.ExtrudeGeometry: vec does not exist\" );\n\n\t\t\treturn vec.clone().multiplyScalar( size ).add( pt );\n\n\t\t}\n\n\t\tvar b, bs, t, z,\n\t\t\tvert, vlen = vertices.length,\n\t\t\tface, flen = faces.length;\n\n\n\t\t// Find directions for point movement\n\n\n\t\tfunction getBevelVec( inPt, inPrev, inNext ) {\n\n\t\t\t// computes for inPt the corresponding point inPt' on a new contour\n\t\t\t//   shifted by 1 unit (length of normalized vector) to the left\n\t\t\t// if we walk along contour clockwise, this new contour is outside the old one\n\t\t\t//\n\t\t\t// inPt' is the intersection of the two lines parallel to the two\n\t\t\t//  adjacent edges of inPt at a distance of 1 unit on the left side.\n\n\t\t\tvar v_trans_x, v_trans_y, shrink_by; // resulting translation vector for inPt\n\n\t\t\t// good reading for geometry algorithms (here: line-line intersection)\n\t\t\t// http://geomalgorithms.com/a05-_intersect-1.html\n\n\t\t\tvar v_prev_x = inPt.x - inPrev.x,\n\t\t\t\tv_prev_y = inPt.y - inPrev.y;\n\t\t\tvar v_next_x = inNext.x - inPt.x,\n\t\t\t\tv_next_y = inNext.y - inPt.y;\n\n\t\t\tvar v_prev_lensq = ( v_prev_x * v_prev_x + v_prev_y * v_prev_y );\n\n\t\t\t// check for collinear edges\n\t\t\tvar collinear0 = ( v_prev_x * v_next_y - v_prev_y * v_next_x );\n\n\t\t\tif ( Math.abs( collinear0 ) > Number.EPSILON ) {\n\n\t\t\t\t// not collinear\n\n\t\t\t\t// length of vectors for normalizing\n\n\t\t\t\tvar v_prev_len = Math.sqrt( v_prev_lensq );\n\t\t\t\tvar v_next_len = Math.sqrt( v_next_x * v_next_x + v_next_y * v_next_y );\n\n\t\t\t\t// shift adjacent points by unit vectors to the left\n\n\t\t\t\tvar ptPrevShift_x = ( inPrev.x - v_prev_y / v_prev_len );\n\t\t\t\tvar ptPrevShift_y = ( inPrev.y + v_prev_x / v_prev_len );\n\n\t\t\t\tvar ptNextShift_x = ( inNext.x - v_next_y / v_next_len );\n\t\t\t\tvar ptNextShift_y = ( inNext.y + v_next_x / v_next_len );\n\n\t\t\t\t// scaling factor for v_prev to intersection point\n\n\t\t\t\tvar sf = ( ( ptNextShift_x - ptPrevShift_x ) * v_next_y -\n\t\t\t\t\t\t( ptNextShift_y - ptPrevShift_y ) * v_next_x ) /\n\t\t\t\t\t( v_prev_x * v_next_y - v_prev_y * v_next_x );\n\n\t\t\t\t// vector from inPt to intersection point\n\n\t\t\t\tv_trans_x = ( ptPrevShift_x + v_prev_x * sf - inPt.x );\n\t\t\t\tv_trans_y = ( ptPrevShift_y + v_prev_y * sf - inPt.y );\n\n\t\t\t\t// Don't normalize!, otherwise sharp corners become ugly\n\t\t\t\t//  but prevent crazy spikes\n\t\t\t\tvar v_trans_lensq = ( v_trans_x * v_trans_x + v_trans_y * v_trans_y );\n\t\t\t\tif ( v_trans_lensq <= 2 ) {\n\n\t\t\t\t\treturn new Vector2( v_trans_x, v_trans_y );\n\n\t\t\t\t} else {\n\n\t\t\t\t\tshrink_by = Math.sqrt( v_trans_lensq / 2 );\n\n\t\t\t\t}\n\n\t\t\t} else {\n\n\t\t\t\t// handle special case of collinear edges\n\n\t\t\t\tvar direction_eq = false; // assumes: opposite\n\t\t\t\tif ( v_prev_x > Number.EPSILON ) {\n\n\t\t\t\t\tif ( v_next_x > Number.EPSILON ) {\n\n\t\t\t\t\t\tdirection_eq = true;\n\n\t\t\t\t\t}\n\n\t\t\t\t} else {\n\n\t\t\t\t\tif ( v_prev_x < - Number.EPSILON ) {\n\n\t\t\t\t\t\tif ( v_next_x < - Number.EPSILON ) {\n\n\t\t\t\t\t\t\tdirection_eq = true;\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\tif ( Math.sign( v_prev_y ) === Math.sign( v_next_y ) ) {\n\n\t\t\t\t\t\t\tdirection_eq = true;\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\tif ( direction_eq ) {\n\n\t\t\t\t\t// console.log(\"Warning: lines are a straight sequence\");\n\t\t\t\t\tv_trans_x = - v_prev_y;\n\t\t\t\t\tv_trans_y = v_prev_x;\n\t\t\t\t\tshrink_by = Math.sqrt( v_prev_lensq );\n\n\t\t\t\t} else {\n\n\t\t\t\t\t// console.log(\"Warning: lines are a straight spike\");\n\t\t\t\t\tv_trans_x = v_prev_x;\n\t\t\t\t\tv_trans_y = v_prev_y;\n\t\t\t\t\tshrink_by = Math.sqrt( v_prev_lensq / 2 );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\treturn new Vector2( v_trans_x / shrink_by, v_trans_y / shrink_by );\n\n\t\t}\n\n\n\t\tvar contourMovements = [];\n\n\t\tfor ( var i = 0, il = contour.length, j = il - 1, k = i + 1; i < il; i ++, j ++, k ++ ) {\n\n\t\t\tif ( j === il ) j = 0;\n\t\t\tif ( k === il ) k = 0;\n\n\t\t\t//  (j)---(i)---(k)\n\t\t\t// console.log('i,j,k', i, j , k)\n\n\t\t\tcontourMovements[ i ] = getBevelVec( contour[ i ], contour[ j ], contour[ k ] );\n\n\t\t}\n\n\t\tvar holesMovements = [],\n\t\t\toneHoleMovements, verticesMovements = contourMovements.concat();\n\n\t\tfor ( h = 0, hl = holes.length; h < hl; h ++ ) {\n\n\t\t\tahole = holes[ h ];\n\n\t\t\toneHoleMovements = [];\n\n\t\t\tfor ( i = 0, il = ahole.length, j = il - 1, k = i + 1; i < il; i ++, j ++, k ++ ) {\n\n\t\t\t\tif ( j === il ) j = 0;\n\t\t\t\tif ( k === il ) k = 0;\n\n\t\t\t\t//  (j)---(i)---(k)\n\t\t\t\toneHoleMovements[ i ] = getBevelVec( ahole[ i ], ahole[ j ], ahole[ k ] );\n\n\t\t\t}\n\n\t\t\tholesMovements.push( oneHoleMovements );\n\t\t\tverticesMovements = verticesMovements.concat( oneHoleMovements );\n\n\t\t}\n\n\n\t\t// Loop bevelSegments, 1 for the front, 1 for the back\n\n\t\tfor ( b = 0; b < bevelSegments; b ++ ) {\n\n\t\t\t//for ( b = bevelSegments; b > 0; b -- ) {\n\n\t\t\tt = b / bevelSegments;\n\t\t\tz = bevelThickness * Math.cos( t * Math.PI / 2 );\n\t\t\tbs = bevelSize * Math.sin( t * Math.PI / 2 ) + bevelOffset;\n\n\t\t\t// contract shape\n\n\t\t\tfor ( i = 0, il = contour.length; i < il; i ++ ) {\n\n\t\t\t\tvert = scalePt2( contour[ i ], contourMovements[ i ], bs );\n\n\t\t\t\tv( vert.x, vert.y, - z );\n\n\t\t\t}\n\n\t\t\t// expand holes\n\n\t\t\tfor ( h = 0, hl = holes.length; h < hl; h ++ ) {\n\n\t\t\t\tahole = holes[ h ];\n\t\t\t\toneHoleMovements = holesMovements[ h ];\n\n\t\t\t\tfor ( i = 0, il = ahole.length; i < il; i ++ ) {\n\n\t\t\t\t\tvert = scalePt2( ahole[ i ], oneHoleMovements[ i ], bs );\n\n\t\t\t\t\tv( vert.x, vert.y, - z );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\tbs = bevelSize + bevelOffset;\n\n\t\t// Back facing vertices\n\n\t\tfor ( i = 0; i < vlen; i ++ ) {\n\n\t\t\tvert = bevelEnabled ? scalePt2( vertices[ i ], verticesMovements[ i ], bs ) : vertices[ i ];\n\n\t\t\tif ( ! extrudeByPath ) {\n\n\t\t\t\tv( vert.x, vert.y, 0 );\n\n\t\t\t} else {\n\n\t\t\t\t// v( vert.x, vert.y + extrudePts[ 0 ].y, extrudePts[ 0 ].x );\n\n\t\t\t\tnormal.copy( splineTube.normals[ 0 ] ).multiplyScalar( vert.x );\n\t\t\t\tbinormal.copy( splineTube.binormals[ 0 ] ).multiplyScalar( vert.y );\n\n\t\t\t\tposition2.copy( extrudePts[ 0 ] ).add( normal ).add( binormal );\n\n\t\t\t\tv( position2.x, position2.y, position2.z );\n\n\t\t\t}\n\n\t\t}\n\n\t\t// Add stepped vertices...\n\t\t// Including front facing vertices\n\n\t\tvar s;\n\n\t\tfor ( s = 1; s <= steps; s ++ ) {\n\n\t\t\tfor ( i = 0; i < vlen; i ++ ) {\n\n\t\t\t\tvert = bevelEnabled ? scalePt2( vertices[ i ], verticesMovements[ i ], bs ) : vertices[ i ];\n\n\t\t\t\tif ( ! extrudeByPath ) {\n\n\t\t\t\t\tv( vert.x, vert.y, depth / steps * s );\n\n\t\t\t\t} else {\n\n\t\t\t\t\t// v( vert.x, vert.y + extrudePts[ s - 1 ].y, extrudePts[ s - 1 ].x );\n\n\t\t\t\t\tnormal.copy( splineTube.normals[ s ] ).multiplyScalar( vert.x );\n\t\t\t\t\tbinormal.copy( splineTube.binormals[ s ] ).multiplyScalar( vert.y );\n\n\t\t\t\t\tposition2.copy( extrudePts[ s ] ).add( normal ).add( binormal );\n\n\t\t\t\t\tv( position2.x, position2.y, position2.z );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\n\t\t// Add bevel segments planes\n\n\t\t//for ( b = 1; b <= bevelSegments; b ++ ) {\n\t\tfor ( b = bevelSegments - 1; b >= 0; b -- ) {\n\n\t\t\tt = b / bevelSegments;\n\t\t\tz = bevelThickness * Math.cos( t * Math.PI / 2 );\n\t\t\tbs = bevelSize * Math.sin( t * Math.PI / 2 ) + bevelOffset;\n\n\t\t\t// contract shape\n\n\t\t\tfor ( i = 0, il = contour.length; i < il; i ++ ) {\n\n\t\t\t\tvert = scalePt2( contour[ i ], contourMovements[ i ], bs );\n\t\t\t\tv( vert.x, vert.y, depth + z );\n\n\t\t\t}\n\n\t\t\t// expand holes\n\n\t\t\tfor ( h = 0, hl = holes.length; h < hl; h ++ ) {\n\n\t\t\t\tahole = holes[ h ];\n\t\t\t\toneHoleMovements = holesMovements[ h ];\n\n\t\t\t\tfor ( i = 0, il = ahole.length; i < il; i ++ ) {\n\n\t\t\t\t\tvert = scalePt2( ahole[ i ], oneHoleMovements[ i ], bs );\n\n\t\t\t\t\tif ( ! extrudeByPath ) {\n\n\t\t\t\t\t\tv( vert.x, vert.y, depth + z );\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\tv( vert.x, vert.y + extrudePts[ steps - 1 ].y, extrudePts[ steps - 1 ].x + z );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\t/* Faces */\n\n\t\t// Top and bottom faces\n\n\t\tbuildLidFaces();\n\n\t\t// Sides faces\n\n\t\tbuildSideFaces();\n\n\n\t\t/////  Internal functions\n\n\t\tfunction buildLidFaces() {\n\n\t\t\tvar start = verticesArray.length / 3;\n\n\t\t\tif ( bevelEnabled ) {\n\n\t\t\t\tvar layer = 0; // steps + 1\n\t\t\t\tvar offset = vlen * layer;\n\n\t\t\t\t// Bottom faces\n\n\t\t\t\tfor ( i = 0; i < flen; i ++ ) {\n\n\t\t\t\t\tface = faces[ i ];\n\t\t\t\t\tf3( face[ 2 ] + offset, face[ 1 ] + offset, face[ 0 ] + offset );\n\n\t\t\t\t}\n\n\t\t\t\tlayer = steps + bevelSegments * 2;\n\t\t\t\toffset = vlen * layer;\n\n\t\t\t\t// Top faces\n\n\t\t\t\tfor ( i = 0; i < flen; i ++ ) {\n\n\t\t\t\t\tface = faces[ i ];\n\t\t\t\t\tf3( face[ 0 ] + offset, face[ 1 ] + offset, face[ 2 ] + offset );\n\n\t\t\t\t}\n\n\t\t\t} else {\n\n\t\t\t\t// Bottom faces\n\n\t\t\t\tfor ( i = 0; i < flen; i ++ ) {\n\n\t\t\t\t\tface = faces[ i ];\n\t\t\t\t\tf3( face[ 2 ], face[ 1 ], face[ 0 ] );\n\n\t\t\t\t}\n\n\t\t\t\t// Top faces\n\n\t\t\t\tfor ( i = 0; i < flen; i ++ ) {\n\n\t\t\t\t\tface = faces[ i ];\n\t\t\t\t\tf3( face[ 0 ] + vlen * steps, face[ 1 ] + vlen * steps, face[ 2 ] + vlen * steps );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tscope.addGroup( start, verticesArray.length / 3 - start, 0 );\n\n\t\t}\n\n\t\t// Create faces for the z-sides of the shape\n\n\t\tfunction buildSideFaces() {\n\n\t\t\tvar start = verticesArray.length / 3;\n\t\t\tvar layeroffset = 0;\n\t\t\tsidewalls( contour, layeroffset );\n\t\t\tlayeroffset += contour.length;\n\n\t\t\tfor ( h = 0, hl = holes.length; h < hl; h ++ ) {\n\n\t\t\t\tahole = holes[ h ];\n\t\t\t\tsidewalls( ahole, layeroffset );\n\n\t\t\t\t//, true\n\t\t\t\tlayeroffset += ahole.length;\n\n\t\t\t}\n\n\n\t\t\tscope.addGroup( start, verticesArray.length / 3 - start, 1 );\n\n\n\t\t}\n\n\t\tfunction sidewalls( contour, layeroffset ) {\n\n\t\t\tvar j, k;\n\t\t\ti = contour.length;\n\n\t\t\twhile ( -- i >= 0 ) {\n\n\t\t\t\tj = i;\n\t\t\t\tk = i - 1;\n\t\t\t\tif ( k < 0 ) k = contour.length - 1;\n\n\t\t\t\t//console.log('b', i,j, i-1, k,vertices.length);\n\n\t\t\t\tvar s = 0,\n\t\t\t\t\tsl = steps + bevelSegments * 2;\n\n\t\t\t\tfor ( s = 0; s < sl; s ++ ) {\n\n\t\t\t\t\tvar slen1 = vlen * s;\n\t\t\t\t\tvar slen2 = vlen * ( s + 1 );\n\n\t\t\t\t\tvar a = layeroffset + j + slen1,\n\t\t\t\t\t\tb = layeroffset + k + slen1,\n\t\t\t\t\t\tc = layeroffset + k + slen2,\n\t\t\t\t\t\td = layeroffset + j + slen2;\n\n\t\t\t\t\tf4( a, b, c, d );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\tfunction v( x, y, z ) {\n\n\t\t\tplaceholder.push( x );\n\t\t\tplaceholder.push( y );\n\t\t\tplaceholder.push( z );\n\n\t\t}\n\n\n\t\tfunction f3( a, b, c ) {\n\n\t\t\taddVertex( a );\n\t\t\taddVertex( b );\n\t\t\taddVertex( c );\n\n\t\t\tvar nextIndex = verticesArray.length / 3;\n\t\t\tvar uvs = uvgen.generateTopUV( scope, verticesArray, nextIndex - 3, nextIndex - 2, nextIndex - 1 );\n\n\t\t\taddUV( uvs[ 0 ] );\n\t\t\taddUV( uvs[ 1 ] );\n\t\t\taddUV( uvs[ 2 ] );\n\n\t\t}\n\n\t\tfunction f4( a, b, c, d ) {\n\n\t\t\taddVertex( a );\n\t\t\taddVertex( b );\n\t\t\taddVertex( d );\n\n\t\t\taddVertex( b );\n\t\t\taddVertex( c );\n\t\t\taddVertex( d );\n\n\n\t\t\tvar nextIndex = verticesArray.length / 3;\n\t\t\tvar uvs = uvgen.generateSideWallUV( scope, verticesArray, nextIndex - 6, nextIndex - 3, nextIndex - 2, nextIndex - 1 );\n\n\t\t\taddUV( uvs[ 0 ] );\n\t\t\taddUV( uvs[ 1 ] );\n\t\t\taddUV( uvs[ 3 ] );\n\n\t\t\taddUV( uvs[ 1 ] );\n\t\t\taddUV( uvs[ 2 ] );\n\t\t\taddUV( uvs[ 3 ] );\n\n\t\t}\n\n\t\tfunction addVertex( index ) {\n\n\t\t\tverticesArray.push( placeholder[ index * 3 + 0 ] );\n\t\t\tverticesArray.push( placeholder[ index * 3 + 1 ] );\n\t\t\tverticesArray.push( placeholder[ index * 3 + 2 ] );\n\n\t\t}\n\n\n\t\tfunction addUV( vector2 ) {\n\n\t\t\tuvArray.push( vector2.x );\n\t\t\tuvArray.push( vector2.y );\n\n\t\t}\n\n\t}\n\n}\n\nExtrudeBufferGeometry.prototype = Object.create( BufferGeometry.prototype );\nExtrudeBufferGeometry.prototype.constructor = ExtrudeBufferGeometry;\n\nExtrudeBufferGeometry.prototype.toJSON = function () {\n\n\tvar data = BufferGeometry.prototype.toJSON.call( this );\n\n\tvar shapes = this.parameters.shapes;\n\tvar options = this.parameters.options;\n\n\treturn toJSON( shapes, options, data );\n\n};\n\n//\n\nvar WorldUVGenerator = {\n\n\tgenerateTopUV: function ( geometry, vertices, indexA, indexB, indexC ) {\n\n\t\tvar a_x = vertices[ indexA * 3 ];\n\t\tvar a_y = vertices[ indexA * 3 + 1 ];\n\t\tvar b_x = vertices[ indexB * 3 ];\n\t\tvar b_y = vertices[ indexB * 3 + 1 ];\n\t\tvar c_x = vertices[ indexC * 3 ];\n\t\tvar c_y = vertices[ indexC * 3 + 1 ];\n\n\t\treturn [\n\t\t\tnew Vector2( a_x, a_y ),\n\t\t\tnew Vector2( b_x, b_y ),\n\t\t\tnew Vector2( c_x, c_y )\n\t\t];\n\n\t},\n\n\tgenerateSideWallUV: function ( geometry, vertices, indexA, indexB, indexC, indexD ) {\n\n\t\tvar a_x = vertices[ indexA * 3 ];\n\t\tvar a_y = vertices[ indexA * 3 + 1 ];\n\t\tvar a_z = vertices[ indexA * 3 + 2 ];\n\t\tvar b_x = vertices[ indexB * 3 ];\n\t\tvar b_y = vertices[ indexB * 3 + 1 ];\n\t\tvar b_z = vertices[ indexB * 3 + 2 ];\n\t\tvar c_x = vertices[ indexC * 3 ];\n\t\tvar c_y = vertices[ indexC * 3 + 1 ];\n\t\tvar c_z = vertices[ indexC * 3 + 2 ];\n\t\tvar d_x = vertices[ indexD * 3 ];\n\t\tvar d_y = vertices[ indexD * 3 + 1 ];\n\t\tvar d_z = vertices[ indexD * 3 + 2 ];\n\n\t\tif ( Math.abs( a_y - b_y ) < 0.01 ) {\n\n\t\t\treturn [\n\t\t\t\tnew Vector2( a_x, 1 - a_z ),\n\t\t\t\tnew Vector2( b_x, 1 - b_z ),\n\t\t\t\tnew Vector2( c_x, 1 - c_z ),\n\t\t\t\tnew Vector2( d_x, 1 - d_z )\n\t\t\t];\n\n\t\t} else {\n\n\t\t\treturn [\n\t\t\t\tnew Vector2( a_y, 1 - a_z ),\n\t\t\t\tnew Vector2( b_y, 1 - b_z ),\n\t\t\t\tnew Vector2( c_y, 1 - c_z ),\n\t\t\t\tnew Vector2( d_y, 1 - d_z )\n\t\t\t];\n\n\t\t}\n\n\t}\n};\n\nfunction toJSON( shapes, options, data ) {\n\n\t//\n\n\tdata.shapes = [];\n\n\tif ( Array.isArray( shapes ) ) {\n\n\t\tfor ( var i = 0, l = shapes.length; i < l; i ++ ) {\n\n\t\t\tvar shape = shapes[ i ];\n\n\t\t\tdata.shapes.push( shape.uuid );\n\n\t\t}\n\n\t} else {\n\n\t\tdata.shapes.push( shapes.uuid );\n\n\t}\n\n\t//\n\n\tif ( options.extrudePath !== undefined ) data.options.extrudePath = options.extrudePath.toJSON();\n\n\treturn data;\n\n}\n\n/**\n * @author zz85 / http://www.lab4games.net/zz85/blog\n * @author alteredq / http://alteredqualia.com/\n *\n * Text = 3D Text\n *\n * parameters = {\n *  font: <THREE.Font>, // font\n *\n *  size: <float>, // size of the text\n *  height: <float>, // thickness to extrude text\n *  curveSegments: <int>, // number of points on the curves\n *\n *  bevelEnabled: <bool>, // turn on bevel\n *  bevelThickness: <float>, // how deep into text bevel goes\n *  bevelSize: <float>, // how far from text outline (including bevelOffset) is bevel\n *  bevelOffset: <float> // how far from text outline does bevel start\n * }\n */\n\n// TextGeometry\n\nfunction TextGeometry( text, parameters ) {\n\n\tGeometry.call( this );\n\n\tthis.type = 'TextGeometry';\n\n\tthis.parameters = {\n\t\ttext: text,\n\t\tparameters: parameters\n\t};\n\n\tthis.fromBufferGeometry( new TextBufferGeometry( text, parameters ) );\n\tthis.mergeVertices();\n\n}\n\nTextGeometry.prototype = Object.create( Geometry.prototype );\nTextGeometry.prototype.constructor = TextGeometry;\n\n// TextBufferGeometry\n\nfunction TextBufferGeometry( text, parameters ) {\n\n\tparameters = parameters || {};\n\n\tvar font = parameters.font;\n\n\tif ( ! ( font && font.isFont ) ) {\n\n\t\tconsole.error( 'THREE.TextGeometry: font parameter is not an instance of THREE.Font.' );\n\t\treturn new Geometry();\n\n\t}\n\n\tvar shapes = font.generateShapes( text, parameters.size );\n\n\t// translate parameters to ExtrudeGeometry API\n\n\tparameters.depth = parameters.height !== undefined ? parameters.height : 50;\n\n\t// defaults\n\n\tif ( parameters.bevelThickness === undefined ) parameters.bevelThickness = 10;\n\tif ( parameters.bevelSize === undefined ) parameters.bevelSize = 8;\n\tif ( parameters.bevelEnabled === undefined ) parameters.bevelEnabled = false;\n\n\tExtrudeBufferGeometry.call( this, shapes, parameters );\n\n\tthis.type = 'TextBufferGeometry';\n\n}\n\nTextBufferGeometry.prototype = Object.create( ExtrudeBufferGeometry.prototype );\nTextBufferGeometry.prototype.constructor = TextBufferGeometry;\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author benaadams / https://twitter.com/ben_a_adams\n * @author Mugen87 / https://github.com/Mugen87\n */\n\n// SphereGeometry\n\nfunction SphereGeometry( radius, widthSegments, heightSegments, phiStart, phiLength, thetaStart, thetaLength ) {\n\n\tGeometry.call( this );\n\n\tthis.type = 'SphereGeometry';\n\n\tthis.parameters = {\n\t\tradius: radius,\n\t\twidthSegments: widthSegments,\n\t\theightSegments: heightSegments,\n\t\tphiStart: phiStart,\n\t\tphiLength: phiLength,\n\t\tthetaStart: thetaStart,\n\t\tthetaLength: thetaLength\n\t};\n\n\tthis.fromBufferGeometry( new SphereBufferGeometry( radius, widthSegments, heightSegments, phiStart, phiLength, thetaStart, thetaLength ) );\n\tthis.mergeVertices();\n\n}\n\nSphereGeometry.prototype = Object.create( Geometry.prototype );\nSphereGeometry.prototype.constructor = SphereGeometry;\n\n// SphereBufferGeometry\n\nfunction SphereBufferGeometry( radius, widthSegments, heightSegments, phiStart, phiLength, thetaStart, thetaLength ) {\n\n\tBufferGeometry.call( this );\n\n\tthis.type = 'SphereBufferGeometry';\n\n\tthis.parameters = {\n\t\tradius: radius,\n\t\twidthSegments: widthSegments,\n\t\theightSegments: heightSegments,\n\t\tphiStart: phiStart,\n\t\tphiLength: phiLength,\n\t\tthetaStart: thetaStart,\n\t\tthetaLength: thetaLength\n\t};\n\n\tradius = radius || 1;\n\n\twidthSegments = Math.max( 3, Math.floor( widthSegments ) || 8 );\n\theightSegments = Math.max( 2, Math.floor( heightSegments ) || 6 );\n\n\tphiStart = phiStart !== undefined ? phiStart : 0;\n\tphiLength = phiLength !== undefined ? phiLength : Math.PI * 2;\n\n\tthetaStart = thetaStart !== undefined ? thetaStart : 0;\n\tthetaLength = thetaLength !== undefined ? thetaLength : Math.PI;\n\n\tvar thetaEnd = Math.min( thetaStart + thetaLength, Math.PI );\n\n\tvar ix, iy;\n\n\tvar index = 0;\n\tvar grid = [];\n\n\tvar vertex = new Vector3();\n\tvar normal = new Vector3();\n\n\t// buffers\n\n\tvar indices = [];\n\tvar vertices = [];\n\tvar normals = [];\n\tvar uvs = [];\n\n\t// generate vertices, normals and uvs\n\n\tfor ( iy = 0; iy <= heightSegments; iy ++ ) {\n\n\t\tvar verticesRow = [];\n\n\t\tvar v = iy / heightSegments;\n\n\t\t// special case for the poles\n\n\t\tvar uOffset = 0;\n\n\t\tif ( iy == 0 && thetaStart == 0 ) {\n\n\t\t\tuOffset = 0.5 / widthSegments;\n\n\t\t} else if ( iy == heightSegments && thetaEnd == Math.PI ) {\n\n\t\t\tuOffset = - 0.5 / widthSegments;\n\n\t\t}\n\n\t\tfor ( ix = 0; ix <= widthSegments; ix ++ ) {\n\n\t\t\tvar u = ix / widthSegments;\n\n\t\t\t// vertex\n\n\t\t\tvertex.x = - radius * Math.cos( phiStart + u * phiLength ) * Math.sin( thetaStart + v * thetaLength );\n\t\t\tvertex.y = radius * Math.cos( thetaStart + v * thetaLength );\n\t\t\tvertex.z = radius * Math.sin( phiStart + u * phiLength ) * Math.sin( thetaStart + v * thetaLength );\n\n\t\t\tvertices.push( vertex.x, vertex.y, vertex.z );\n\n\t\t\t// normal\n\n\t\t\tnormal.copy( vertex ).normalize();\n\t\t\tnormals.push( normal.x, normal.y, normal.z );\n\n\t\t\t// uv\n\n\t\t\tuvs.push( u + uOffset, 1 - v );\n\n\t\t\tverticesRow.push( index ++ );\n\n\t\t}\n\n\t\tgrid.push( verticesRow );\n\n\t}\n\n\t// indices\n\n\tfor ( iy = 0; iy < heightSegments; iy ++ ) {\n\n\t\tfor ( ix = 0; ix < widthSegments; ix ++ ) {\n\n\t\t\tvar a = grid[ iy ][ ix + 1 ];\n\t\t\tvar b = grid[ iy ][ ix ];\n\t\t\tvar c = grid[ iy + 1 ][ ix ];\n\t\t\tvar d = grid[ iy + 1 ][ ix + 1 ];\n\n\t\t\tif ( iy !== 0 || thetaStart > 0 ) indices.push( a, b, d );\n\t\t\tif ( iy !== heightSegments - 1 || thetaEnd < Math.PI ) indices.push( b, c, d );\n\n\t\t}\n\n\t}\n\n\t// build geometry\n\n\tthis.setIndex( indices );\n\tthis.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\tthis.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );\n\tthis.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );\n\n}\n\nSphereBufferGeometry.prototype = Object.create( BufferGeometry.prototype );\nSphereBufferGeometry.prototype.constructor = SphereBufferGeometry;\n\n/**\n * @author Kaleb Murphy\n * @author Mugen87 / https://github.com/Mugen87\n */\n\n// RingGeometry\n\nfunction RingGeometry( innerRadius, outerRadius, thetaSegments, phiSegments, thetaStart, thetaLength ) {\n\n\tGeometry.call( this );\n\n\tthis.type = 'RingGeometry';\n\n\tthis.parameters = {\n\t\tinnerRadius: innerRadius,\n\t\touterRadius: outerRadius,\n\t\tthetaSegments: thetaSegments,\n\t\tphiSegments: phiSegments,\n\t\tthetaStart: thetaStart,\n\t\tthetaLength: thetaLength\n\t};\n\n\tthis.fromBufferGeometry( new RingBufferGeometry( innerRadius, outerRadius, thetaSegments, phiSegments, thetaStart, thetaLength ) );\n\tthis.mergeVertices();\n\n}\n\nRingGeometry.prototype = Object.create( Geometry.prototype );\nRingGeometry.prototype.constructor = RingGeometry;\n\n// RingBufferGeometry\n\nfunction RingBufferGeometry( innerRadius, outerRadius, thetaSegments, phiSegments, thetaStart, thetaLength ) {\n\n\tBufferGeometry.call( this );\n\n\tthis.type = 'RingBufferGeometry';\n\n\tthis.parameters = {\n\t\tinnerRadius: innerRadius,\n\t\touterRadius: outerRadius,\n\t\tthetaSegments: thetaSegments,\n\t\tphiSegments: phiSegments,\n\t\tthetaStart: thetaStart,\n\t\tthetaLength: thetaLength\n\t};\n\n\tinnerRadius = innerRadius || 0.5;\n\touterRadius = outerRadius || 1;\n\n\tthetaStart = thetaStart !== undefined ? thetaStart : 0;\n\tthetaLength = thetaLength !== undefined ? thetaLength : Math.PI * 2;\n\n\tthetaSegments = thetaSegments !== undefined ? Math.max( 3, thetaSegments ) : 8;\n\tphiSegments = phiSegments !== undefined ? Math.max( 1, phiSegments ) : 1;\n\n\t// buffers\n\n\tvar indices = [];\n\tvar vertices = [];\n\tvar normals = [];\n\tvar uvs = [];\n\n\t// some helper variables\n\n\tvar segment;\n\tvar radius = innerRadius;\n\tvar radiusStep = ( ( outerRadius - innerRadius ) / phiSegments );\n\tvar vertex = new Vector3();\n\tvar uv = new Vector2();\n\tvar j, i;\n\n\t// generate vertices, normals and uvs\n\n\tfor ( j = 0; j <= phiSegments; j ++ ) {\n\n\t\tfor ( i = 0; i <= thetaSegments; i ++ ) {\n\n\t\t\t// values are generate from the inside of the ring to the outside\n\n\t\t\tsegment = thetaStart + i / thetaSegments * thetaLength;\n\n\t\t\t// vertex\n\n\t\t\tvertex.x = radius * Math.cos( segment );\n\t\t\tvertex.y = radius * Math.sin( segment );\n\n\t\t\tvertices.push( vertex.x, vertex.y, vertex.z );\n\n\t\t\t// normal\n\n\t\t\tnormals.push( 0, 0, 1 );\n\n\t\t\t// uv\n\n\t\t\tuv.x = ( vertex.x / outerRadius + 1 ) / 2;\n\t\t\tuv.y = ( vertex.y / outerRadius + 1 ) / 2;\n\n\t\t\tuvs.push( uv.x, uv.y );\n\n\t\t}\n\n\t\t// increase the radius for next row of vertices\n\n\t\tradius += radiusStep;\n\n\t}\n\n\t// indices\n\n\tfor ( j = 0; j < phiSegments; j ++ ) {\n\n\t\tvar thetaSegmentLevel = j * ( thetaSegments + 1 );\n\n\t\tfor ( i = 0; i < thetaSegments; i ++ ) {\n\n\t\t\tsegment = i + thetaSegmentLevel;\n\n\t\t\tvar a = segment;\n\t\t\tvar b = segment + thetaSegments + 1;\n\t\t\tvar c = segment + thetaSegments + 2;\n\t\t\tvar d = segment + 1;\n\n\t\t\t// faces\n\n\t\t\tindices.push( a, b, d );\n\t\t\tindices.push( b, c, d );\n\n\t\t}\n\n\t}\n\n\t// build geometry\n\n\tthis.setIndex( indices );\n\tthis.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\tthis.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );\n\tthis.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );\n\n}\n\nRingBufferGeometry.prototype = Object.create( BufferGeometry.prototype );\nRingBufferGeometry.prototype.constructor = RingBufferGeometry;\n\n/**\n * @author zz85 / https://github.com/zz85\n * @author bhouston / http://clara.io\n * @author Mugen87 / https://github.com/Mugen87\n */\n\n// LatheGeometry\n\nfunction LatheGeometry( points, segments, phiStart, phiLength ) {\n\n\tGeometry.call( this );\n\n\tthis.type = 'LatheGeometry';\n\n\tthis.parameters = {\n\t\tpoints: points,\n\t\tsegments: segments,\n\t\tphiStart: phiStart,\n\t\tphiLength: phiLength\n\t};\n\n\tthis.fromBufferGeometry( new LatheBufferGeometry( points, segments, phiStart, phiLength ) );\n\tthis.mergeVertices();\n\n}\n\nLatheGeometry.prototype = Object.create( Geometry.prototype );\nLatheGeometry.prototype.constructor = LatheGeometry;\n\n// LatheBufferGeometry\n\nfunction LatheBufferGeometry( points, segments, phiStart, phiLength ) {\n\n\tBufferGeometry.call( this );\n\n\tthis.type = 'LatheBufferGeometry';\n\n\tthis.parameters = {\n\t\tpoints: points,\n\t\tsegments: segments,\n\t\tphiStart: phiStart,\n\t\tphiLength: phiLength\n\t};\n\n\tsegments = Math.floor( segments ) || 12;\n\tphiStart = phiStart || 0;\n\tphiLength = phiLength || Math.PI * 2;\n\n\t// clamp phiLength so it's in range of [ 0, 2PI ]\n\n\tphiLength = MathUtils.clamp( phiLength, 0, Math.PI * 2 );\n\n\n\t// buffers\n\n\tvar indices = [];\n\tvar vertices = [];\n\tvar uvs = [];\n\n\t// helper variables\n\n\tvar base;\n\tvar inverseSegments = 1.0 / segments;\n\tvar vertex = new Vector3();\n\tvar uv = new Vector2();\n\tvar i, j;\n\n\t// generate vertices and uvs\n\n\tfor ( i = 0; i <= segments; i ++ ) {\n\n\t\tvar phi = phiStart + i * inverseSegments * phiLength;\n\n\t\tvar sin = Math.sin( phi );\n\t\tvar cos = Math.cos( phi );\n\n\t\tfor ( j = 0; j <= ( points.length - 1 ); j ++ ) {\n\n\t\t\t// vertex\n\n\t\t\tvertex.x = points[ j ].x * sin;\n\t\t\tvertex.y = points[ j ].y;\n\t\t\tvertex.z = points[ j ].x * cos;\n\n\t\t\tvertices.push( vertex.x, vertex.y, vertex.z );\n\n\t\t\t// uv\n\n\t\t\tuv.x = i / segments;\n\t\t\tuv.y = j / ( points.length - 1 );\n\n\t\t\tuvs.push( uv.x, uv.y );\n\n\n\t\t}\n\n\t}\n\n\t// indices\n\n\tfor ( i = 0; i < segments; i ++ ) {\n\n\t\tfor ( j = 0; j < ( points.length - 1 ); j ++ ) {\n\n\t\t\tbase = j + i * points.length;\n\n\t\t\tvar a = base;\n\t\t\tvar b = base + points.length;\n\t\t\tvar c = base + points.length + 1;\n\t\t\tvar d = base + 1;\n\n\t\t\t// faces\n\n\t\t\tindices.push( a, b, d );\n\t\t\tindices.push( b, c, d );\n\n\t\t}\n\n\t}\n\n\t// build geometry\n\n\tthis.setIndex( indices );\n\tthis.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\tthis.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );\n\n\t// generate normals\n\n\tthis.computeVertexNormals();\n\n\t// if the geometry is closed, we need to average the normals along the seam.\n\t// because the corresponding vertices are identical (but still have different UVs).\n\n\tif ( phiLength === Math.PI * 2 ) {\n\n\t\tvar normals = this.attributes.normal.array;\n\t\tvar n1 = new Vector3();\n\t\tvar n2 = new Vector3();\n\t\tvar n = new Vector3();\n\n\t\t// this is the buffer offset for the last line of vertices\n\n\t\tbase = segments * points.length * 3;\n\n\t\tfor ( i = 0, j = 0; i < points.length; i ++, j += 3 ) {\n\n\t\t\t// select the normal of the vertex in the first line\n\n\t\t\tn1.x = normals[ j + 0 ];\n\t\t\tn1.y = normals[ j + 1 ];\n\t\t\tn1.z = normals[ j + 2 ];\n\n\t\t\t// select the normal of the vertex in the last line\n\n\t\t\tn2.x = normals[ base + j + 0 ];\n\t\t\tn2.y = normals[ base + j + 1 ];\n\t\t\tn2.z = normals[ base + j + 2 ];\n\n\t\t\t// average normals\n\n\t\t\tn.addVectors( n1, n2 ).normalize();\n\n\t\t\t// assign the new values to both normals\n\n\t\t\tnormals[ j + 0 ] = normals[ base + j + 0 ] = n.x;\n\t\t\tnormals[ j + 1 ] = normals[ base + j + 1 ] = n.y;\n\t\t\tnormals[ j + 2 ] = normals[ base + j + 2 ] = n.z;\n\n\t\t}\n\n\t}\n\n}\n\nLatheBufferGeometry.prototype = Object.create( BufferGeometry.prototype );\nLatheBufferGeometry.prototype.constructor = LatheBufferGeometry;\n\n/**\n * @author jonobr1 / http://jonobr1.com\n * @author Mugen87 / https://github.com/Mugen87\n */\n\n// ShapeGeometry\n\nfunction ShapeGeometry( shapes, curveSegments ) {\n\n\tGeometry.call( this );\n\n\tthis.type = 'ShapeGeometry';\n\n\tif ( typeof curveSegments === 'object' ) {\n\n\t\tconsole.warn( 'THREE.ShapeGeometry: Options parameter has been removed.' );\n\n\t\tcurveSegments = curveSegments.curveSegments;\n\n\t}\n\n\tthis.parameters = {\n\t\tshapes: shapes,\n\t\tcurveSegments: curveSegments\n\t};\n\n\tthis.fromBufferGeometry( new ShapeBufferGeometry( shapes, curveSegments ) );\n\tthis.mergeVertices();\n\n}\n\nShapeGeometry.prototype = Object.create( Geometry.prototype );\nShapeGeometry.prototype.constructor = ShapeGeometry;\n\nShapeGeometry.prototype.toJSON = function () {\n\n\tvar data = Geometry.prototype.toJSON.call( this );\n\n\tvar shapes = this.parameters.shapes;\n\n\treturn toJSON$1( shapes, data );\n\n};\n\n// ShapeBufferGeometry\n\nfunction ShapeBufferGeometry( shapes, curveSegments ) {\n\n\tBufferGeometry.call( this );\n\n\tthis.type = 'ShapeBufferGeometry';\n\n\tthis.parameters = {\n\t\tshapes: shapes,\n\t\tcurveSegments: curveSegments\n\t};\n\n\tcurveSegments = curveSegments || 12;\n\n\t// buffers\n\n\tvar indices = [];\n\tvar vertices = [];\n\tvar normals = [];\n\tvar uvs = [];\n\n\t// helper variables\n\n\tvar groupStart = 0;\n\tvar groupCount = 0;\n\n\t// allow single and array values for \"shapes\" parameter\n\n\tif ( Array.isArray( shapes ) === false ) {\n\n\t\taddShape( shapes );\n\n\t} else {\n\n\t\tfor ( var i = 0; i < shapes.length; i ++ ) {\n\n\t\t\taddShape( shapes[ i ] );\n\n\t\t\tthis.addGroup( groupStart, groupCount, i ); // enables MultiMaterial support\n\n\t\t\tgroupStart += groupCount;\n\t\t\tgroupCount = 0;\n\n\t\t}\n\n\t}\n\n\t// build geometry\n\n\tthis.setIndex( indices );\n\tthis.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\tthis.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );\n\tthis.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );\n\n\n\t// helper functions\n\n\tfunction addShape( shape ) {\n\n\t\tvar i, l, shapeHole;\n\n\t\tvar indexOffset = vertices.length / 3;\n\t\tvar points = shape.extractPoints( curveSegments );\n\n\t\tvar shapeVertices = points.shape;\n\t\tvar shapeHoles = points.holes;\n\n\t\t// check direction of vertices\n\n\t\tif ( ShapeUtils.isClockWise( shapeVertices ) === false ) {\n\n\t\t\tshapeVertices = shapeVertices.reverse();\n\n\t\t}\n\n\t\tfor ( i = 0, l = shapeHoles.length; i < l; i ++ ) {\n\n\t\t\tshapeHole = shapeHoles[ i ];\n\n\t\t\tif ( ShapeUtils.isClockWise( shapeHole ) === true ) {\n\n\t\t\t\tshapeHoles[ i ] = shapeHole.reverse();\n\n\t\t\t}\n\n\t\t}\n\n\t\tvar faces = ShapeUtils.triangulateShape( shapeVertices, shapeHoles );\n\n\t\t// join vertices of inner and outer paths to a single array\n\n\t\tfor ( i = 0, l = shapeHoles.length; i < l; i ++ ) {\n\n\t\t\tshapeHole = shapeHoles[ i ];\n\t\t\tshapeVertices = shapeVertices.concat( shapeHole );\n\n\t\t}\n\n\t\t// vertices, normals, uvs\n\n\t\tfor ( i = 0, l = shapeVertices.length; i < l; i ++ ) {\n\n\t\t\tvar vertex = shapeVertices[ i ];\n\n\t\t\tvertices.push( vertex.x, vertex.y, 0 );\n\t\t\tnormals.push( 0, 0, 1 );\n\t\t\tuvs.push( vertex.x, vertex.y ); // world uvs\n\n\t\t}\n\n\t\t// incides\n\n\t\tfor ( i = 0, l = faces.length; i < l; i ++ ) {\n\n\t\t\tvar face = faces[ i ];\n\n\t\t\tvar a = face[ 0 ] + indexOffset;\n\t\t\tvar b = face[ 1 ] + indexOffset;\n\t\t\tvar c = face[ 2 ] + indexOffset;\n\n\t\t\tindices.push( a, b, c );\n\t\t\tgroupCount += 3;\n\n\t\t}\n\n\t}\n\n}\n\nShapeBufferGeometry.prototype = Object.create( BufferGeometry.prototype );\nShapeBufferGeometry.prototype.constructor = ShapeBufferGeometry;\n\nShapeBufferGeometry.prototype.toJSON = function () {\n\n\tvar data = BufferGeometry.prototype.toJSON.call( this );\n\n\tvar shapes = this.parameters.shapes;\n\n\treturn toJSON$1( shapes, data );\n\n};\n\n//\n\nfunction toJSON$1( shapes, data ) {\n\n\tdata.shapes = [];\n\n\tif ( Array.isArray( shapes ) ) {\n\n\t\tfor ( var i = 0, l = shapes.length; i < l; i ++ ) {\n\n\t\t\tvar shape = shapes[ i ];\n\n\t\t\tdata.shapes.push( shape.uuid );\n\n\t\t}\n\n\t} else {\n\n\t\tdata.shapes.push( shapes.uuid );\n\n\t}\n\n\treturn data;\n\n}\n\n/**\n * @author WestLangley / http://github.com/WestLangley\n * @author Mugen87 / https://github.com/Mugen87\n */\n\nfunction EdgesGeometry( geometry, thresholdAngle ) {\n\n\tBufferGeometry.call( this );\n\n\tthis.type = 'EdgesGeometry';\n\n\tthis.parameters = {\n\t\tthresholdAngle: thresholdAngle\n\t};\n\n\tthresholdAngle = ( thresholdAngle !== undefined ) ? thresholdAngle : 1;\n\n\t// buffer\n\n\tvar vertices = [];\n\n\t// helper variables\n\n\tvar thresholdDot = Math.cos( MathUtils.DEG2RAD * thresholdAngle );\n\tvar edge = [ 0, 0 ], edges = {}, edge1, edge2;\n\tvar key, keys = [ 'a', 'b', 'c' ];\n\n\t// prepare source geometry\n\n\tvar geometry2;\n\n\tif ( geometry.isBufferGeometry ) {\n\n\t\tgeometry2 = new Geometry();\n\t\tgeometry2.fromBufferGeometry( geometry );\n\n\t} else {\n\n\t\tgeometry2 = geometry.clone();\n\n\t}\n\n\tgeometry2.mergeVertices();\n\tgeometry2.computeFaceNormals();\n\n\tvar sourceVertices = geometry2.vertices;\n\tvar faces = geometry2.faces;\n\n\t// now create a data structure where each entry represents an edge with its adjoining faces\n\n\tfor ( var i = 0, l = faces.length; i < l; i ++ ) {\n\n\t\tvar face = faces[ i ];\n\n\t\tfor ( var j = 0; j < 3; j ++ ) {\n\n\t\t\tedge1 = face[ keys[ j ] ];\n\t\t\tedge2 = face[ keys[ ( j + 1 ) % 3 ] ];\n\t\t\tedge[ 0 ] = Math.min( edge1, edge2 );\n\t\t\tedge[ 1 ] = Math.max( edge1, edge2 );\n\n\t\t\tkey = edge[ 0 ] + ',' + edge[ 1 ];\n\n\t\t\tif ( edges[ key ] === undefined ) {\n\n\t\t\t\tedges[ key ] = { index1: edge[ 0 ], index2: edge[ 1 ], face1: i, face2: undefined };\n\n\t\t\t} else {\n\n\t\t\t\tedges[ key ].face2 = i;\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\t// generate vertices\n\n\tfor ( key in edges ) {\n\n\t\tvar e = edges[ key ];\n\n\t\t// an edge is only rendered if the angle (in degrees) between the face normals of the adjoining faces exceeds this value. default = 1 degree.\n\n\t\tif ( e.face2 === undefined || faces[ e.face1 ].normal.dot( faces[ e.face2 ].normal ) <= thresholdDot ) {\n\n\t\t\tvar vertex = sourceVertices[ e.index1 ];\n\t\t\tvertices.push( vertex.x, vertex.y, vertex.z );\n\n\t\t\tvertex = sourceVertices[ e.index2 ];\n\t\t\tvertices.push( vertex.x, vertex.y, vertex.z );\n\n\t\t}\n\n\t}\n\n\t// build geometry\n\n\tthis.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\n}\n\nEdgesGeometry.prototype = Object.create( BufferGeometry.prototype );\nEdgesGeometry.prototype.constructor = EdgesGeometry;\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author Mugen87 / https://github.com/Mugen87\n */\n\n// CylinderGeometry\n\nfunction CylinderGeometry( radiusTop, radiusBottom, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength ) {\n\n\tGeometry.call( this );\n\n\tthis.type = 'CylinderGeometry';\n\n\tthis.parameters = {\n\t\tradiusTop: radiusTop,\n\t\tradiusBottom: radiusBottom,\n\t\theight: height,\n\t\tradialSegments: radialSegments,\n\t\theightSegments: heightSegments,\n\t\topenEnded: openEnded,\n\t\tthetaStart: thetaStart,\n\t\tthetaLength: thetaLength\n\t};\n\n\tthis.fromBufferGeometry( new CylinderBufferGeometry( radiusTop, radiusBottom, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength ) );\n\tthis.mergeVertices();\n\n}\n\nCylinderGeometry.prototype = Object.create( Geometry.prototype );\nCylinderGeometry.prototype.constructor = CylinderGeometry;\n\n// CylinderBufferGeometry\n\nfunction CylinderBufferGeometry( radiusTop, radiusBottom, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength ) {\n\n\tBufferGeometry.call( this );\n\n\tthis.type = 'CylinderBufferGeometry';\n\n\tthis.parameters = {\n\t\tradiusTop: radiusTop,\n\t\tradiusBottom: radiusBottom,\n\t\theight: height,\n\t\tradialSegments: radialSegments,\n\t\theightSegments: heightSegments,\n\t\topenEnded: openEnded,\n\t\tthetaStart: thetaStart,\n\t\tthetaLength: thetaLength\n\t};\n\n\tvar scope = this;\n\n\tradiusTop = radiusTop !== undefined ? radiusTop : 1;\n\tradiusBottom = radiusBottom !== undefined ? radiusBottom : 1;\n\theight = height || 1;\n\n\tradialSegments = Math.floor( radialSegments ) || 8;\n\theightSegments = Math.floor( heightSegments ) || 1;\n\n\topenEnded = openEnded !== undefined ? openEnded : false;\n\tthetaStart = thetaStart !== undefined ? thetaStart : 0.0;\n\tthetaLength = thetaLength !== undefined ? thetaLength : Math.PI * 2;\n\n\t// buffers\n\n\tvar indices = [];\n\tvar vertices = [];\n\tvar normals = [];\n\tvar uvs = [];\n\n\t// helper variables\n\n\tvar index = 0;\n\tvar indexArray = [];\n\tvar halfHeight = height / 2;\n\tvar groupStart = 0;\n\n\t// generate geometry\n\n\tgenerateTorso();\n\n\tif ( openEnded === false ) {\n\n\t\tif ( radiusTop > 0 ) generateCap( true );\n\t\tif ( radiusBottom > 0 ) generateCap( false );\n\n\t}\n\n\t// build geometry\n\n\tthis.setIndex( indices );\n\tthis.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\tthis.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );\n\tthis.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );\n\n\tfunction generateTorso() {\n\n\t\tvar x, y;\n\t\tvar normal = new Vector3();\n\t\tvar vertex = new Vector3();\n\n\t\tvar groupCount = 0;\n\n\t\t// this will be used to calculate the normal\n\t\tvar slope = ( radiusBottom - radiusTop ) / height;\n\n\t\t// generate vertices, normals and uvs\n\n\t\tfor ( y = 0; y <= heightSegments; y ++ ) {\n\n\t\t\tvar indexRow = [];\n\n\t\t\tvar v = y / heightSegments;\n\n\t\t\t// calculate the radius of the current row\n\n\t\t\tvar radius = v * ( radiusBottom - radiusTop ) + radiusTop;\n\n\t\t\tfor ( x = 0; x <= radialSegments; x ++ ) {\n\n\t\t\t\tvar u = x / radialSegments;\n\n\t\t\t\tvar theta = u * thetaLength + thetaStart;\n\n\t\t\t\tvar sinTheta = Math.sin( theta );\n\t\t\t\tvar cosTheta = Math.cos( theta );\n\n\t\t\t\t// vertex\n\n\t\t\t\tvertex.x = radius * sinTheta;\n\t\t\t\tvertex.y = - v * height + halfHeight;\n\t\t\t\tvertex.z = radius * cosTheta;\n\t\t\t\tvertices.push( vertex.x, vertex.y, vertex.z );\n\n\t\t\t\t// normal\n\n\t\t\t\tnormal.set( sinTheta, slope, cosTheta ).normalize();\n\t\t\t\tnormals.push( normal.x, normal.y, normal.z );\n\n\t\t\t\t// uv\n\n\t\t\t\tuvs.push( u, 1 - v );\n\n\t\t\t\t// save index of vertex in respective row\n\n\t\t\t\tindexRow.push( index ++ );\n\n\t\t\t}\n\n\t\t\t// now save vertices of the row in our index array\n\n\t\t\tindexArray.push( indexRow );\n\n\t\t}\n\n\t\t// generate indices\n\n\t\tfor ( x = 0; x < radialSegments; x ++ ) {\n\n\t\t\tfor ( y = 0; y < heightSegments; y ++ ) {\n\n\t\t\t\t// we use the index array to access the correct indices\n\n\t\t\t\tvar a = indexArray[ y ][ x ];\n\t\t\t\tvar b = indexArray[ y + 1 ][ x ];\n\t\t\t\tvar c = indexArray[ y + 1 ][ x + 1 ];\n\t\t\t\tvar d = indexArray[ y ][ x + 1 ];\n\n\t\t\t\t// faces\n\n\t\t\t\tindices.push( a, b, d );\n\t\t\t\tindices.push( b, c, d );\n\n\t\t\t\t// update group counter\n\n\t\t\t\tgroupCount += 6;\n\n\t\t\t}\n\n\t\t}\n\n\t\t// add a group to the geometry. this will ensure multi material support\n\n\t\tscope.addGroup( groupStart, groupCount, 0 );\n\n\t\t// calculate new start value for groups\n\n\t\tgroupStart += groupCount;\n\n\t}\n\n\tfunction generateCap( top ) {\n\n\t\tvar x, centerIndexStart, centerIndexEnd;\n\n\t\tvar uv = new Vector2();\n\t\tvar vertex = new Vector3();\n\n\t\tvar groupCount = 0;\n\n\t\tvar radius = ( top === true ) ? radiusTop : radiusBottom;\n\t\tvar sign = ( top === true ) ? 1 : - 1;\n\n\t\t// save the index of the first center vertex\n\t\tcenterIndexStart = index;\n\n\t\t// first we generate the center vertex data of the cap.\n\t\t// because the geometry needs one set of uvs per face,\n\t\t// we must generate a center vertex per face/segment\n\n\t\tfor ( x = 1; x <= radialSegments; x ++ ) {\n\n\t\t\t// vertex\n\n\t\t\tvertices.push( 0, halfHeight * sign, 0 );\n\n\t\t\t// normal\n\n\t\t\tnormals.push( 0, sign, 0 );\n\n\t\t\t// uv\n\n\t\t\tuvs.push( 0.5, 0.5 );\n\n\t\t\t// increase index\n\n\t\t\tindex ++;\n\n\t\t}\n\n\t\t// save the index of the last center vertex\n\n\t\tcenterIndexEnd = index;\n\n\t\t// now we generate the surrounding vertices, normals and uvs\n\n\t\tfor ( x = 0; x <= radialSegments; x ++ ) {\n\n\t\t\tvar u = x / radialSegments;\n\t\t\tvar theta = u * thetaLength + thetaStart;\n\n\t\t\tvar cosTheta = Math.cos( theta );\n\t\t\tvar sinTheta = Math.sin( theta );\n\n\t\t\t// vertex\n\n\t\t\tvertex.x = radius * sinTheta;\n\t\t\tvertex.y = halfHeight * sign;\n\t\t\tvertex.z = radius * cosTheta;\n\t\t\tvertices.push( vertex.x, vertex.y, vertex.z );\n\n\t\t\t// normal\n\n\t\t\tnormals.push( 0, sign, 0 );\n\n\t\t\t// uv\n\n\t\t\tuv.x = ( cosTheta * 0.5 ) + 0.5;\n\t\t\tuv.y = ( sinTheta * 0.5 * sign ) + 0.5;\n\t\t\tuvs.push( uv.x, uv.y );\n\n\t\t\t// increase index\n\n\t\t\tindex ++;\n\n\t\t}\n\n\t\t// generate indices\n\n\t\tfor ( x = 0; x < radialSegments; x ++ ) {\n\n\t\t\tvar c = centerIndexStart + x;\n\t\t\tvar i = centerIndexEnd + x;\n\n\t\t\tif ( top === true ) {\n\n\t\t\t\t// face top\n\n\t\t\t\tindices.push( i, i + 1, c );\n\n\t\t\t} else {\n\n\t\t\t\t// face bottom\n\n\t\t\t\tindices.push( i + 1, i, c );\n\n\t\t\t}\n\n\t\t\tgroupCount += 3;\n\n\t\t}\n\n\t\t// add a group to the geometry. this will ensure multi material support\n\n\t\tscope.addGroup( groupStart, groupCount, top === true ? 1 : 2 );\n\n\t\t// calculate new start value for groups\n\n\t\tgroupStart += groupCount;\n\n\t}\n\n}\n\nCylinderBufferGeometry.prototype = Object.create( BufferGeometry.prototype );\nCylinderBufferGeometry.prototype.constructor = CylinderBufferGeometry;\n\n/**\n * @author abelnation / http://github.com/abelnation\n */\n\n// ConeGeometry\n\nfunction ConeGeometry( radius, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength ) {\n\n\tCylinderGeometry.call( this, 0, radius, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength );\n\n\tthis.type = 'ConeGeometry';\n\n\tthis.parameters = {\n\t\tradius: radius,\n\t\theight: height,\n\t\tradialSegments: radialSegments,\n\t\theightSegments: heightSegments,\n\t\topenEnded: openEnded,\n\t\tthetaStart: thetaStart,\n\t\tthetaLength: thetaLength\n\t};\n\n}\n\nConeGeometry.prototype = Object.create( CylinderGeometry.prototype );\nConeGeometry.prototype.constructor = ConeGeometry;\n\n// ConeBufferGeometry\n\nfunction ConeBufferGeometry( radius, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength ) {\n\n\tCylinderBufferGeometry.call( this, 0, radius, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength );\n\n\tthis.type = 'ConeBufferGeometry';\n\n\tthis.parameters = {\n\t\tradius: radius,\n\t\theight: height,\n\t\tradialSegments: radialSegments,\n\t\theightSegments: heightSegments,\n\t\topenEnded: openEnded,\n\t\tthetaStart: thetaStart,\n\t\tthetaLength: thetaLength\n\t};\n\n}\n\nConeBufferGeometry.prototype = Object.create( CylinderBufferGeometry.prototype );\nConeBufferGeometry.prototype.constructor = ConeBufferGeometry;\n\n/**\n * @author benaadams / https://twitter.com/ben_a_adams\n * @author Mugen87 / https://github.com/Mugen87\n * @author hughes\n */\n\n// CircleGeometry\n\nfunction CircleGeometry( radius, segments, thetaStart, thetaLength ) {\n\n\tGeometry.call( this );\n\n\tthis.type = 'CircleGeometry';\n\n\tthis.parameters = {\n\t\tradius: radius,\n\t\tsegments: segments,\n\t\tthetaStart: thetaStart,\n\t\tthetaLength: thetaLength\n\t};\n\n\tthis.fromBufferGeometry( new CircleBufferGeometry( radius, segments, thetaStart, thetaLength ) );\n\tthis.mergeVertices();\n\n}\n\nCircleGeometry.prototype = Object.create( Geometry.prototype );\nCircleGeometry.prototype.constructor = CircleGeometry;\n\n// CircleBufferGeometry\n\nfunction CircleBufferGeometry( radius, segments, thetaStart, thetaLength ) {\n\n\tBufferGeometry.call( this );\n\n\tthis.type = 'CircleBufferGeometry';\n\n\tthis.parameters = {\n\t\tradius: radius,\n\t\tsegments: segments,\n\t\tthetaStart: thetaStart,\n\t\tthetaLength: thetaLength\n\t};\n\n\tradius = radius || 1;\n\tsegments = segments !== undefined ? Math.max( 3, segments ) : 8;\n\n\tthetaStart = thetaStart !== undefined ? thetaStart : 0;\n\tthetaLength = thetaLength !== undefined ? thetaLength : Math.PI * 2;\n\n\t// buffers\n\n\tvar indices = [];\n\tvar vertices = [];\n\tvar normals = [];\n\tvar uvs = [];\n\n\t// helper variables\n\n\tvar i, s;\n\tvar vertex = new Vector3();\n\tvar uv = new Vector2();\n\n\t// center point\n\n\tvertices.push( 0, 0, 0 );\n\tnormals.push( 0, 0, 1 );\n\tuvs.push( 0.5, 0.5 );\n\n\tfor ( s = 0, i = 3; s <= segments; s ++, i += 3 ) {\n\n\t\tvar segment = thetaStart + s / segments * thetaLength;\n\n\t\t// vertex\n\n\t\tvertex.x = radius * Math.cos( segment );\n\t\tvertex.y = radius * Math.sin( segment );\n\n\t\tvertices.push( vertex.x, vertex.y, vertex.z );\n\n\t\t// normal\n\n\t\tnormals.push( 0, 0, 1 );\n\n\t\t// uvs\n\n\t\tuv.x = ( vertices[ i ] / radius + 1 ) / 2;\n\t\tuv.y = ( vertices[ i + 1 ] / radius + 1 ) / 2;\n\n\t\tuvs.push( uv.x, uv.y );\n\n\t}\n\n\t// indices\n\n\tfor ( i = 1; i <= segments; i ++ ) {\n\n\t\tindices.push( i, i + 1, 0 );\n\n\t}\n\n\t// build geometry\n\n\tthis.setIndex( indices );\n\tthis.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\tthis.setAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );\n\tthis.setAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );\n\n}\n\nCircleBufferGeometry.prototype = Object.create( BufferGeometry.prototype );\nCircleBufferGeometry.prototype.constructor = CircleBufferGeometry;\n\n\n\nvar Geometries = /*#__PURE__*/Object.freeze({\n\t__proto__: null,\n\tWireframeGeometry: WireframeGeometry,\n\tParametricGeometry: ParametricGeometry,\n\tParametricBufferGeometry: ParametricBufferGeometry,\n\tTetrahedronGeometry: TetrahedronGeometry,\n\tTetrahedronBufferGeometry: TetrahedronBufferGeometry,\n\tOctahedronGeometry: OctahedronGeometry,\n\tOctahedronBufferGeometry: OctahedronBufferGeometry,\n\tIcosahedronGeometry: IcosahedronGeometry,\n\tIcosahedronBufferGeometry: IcosahedronBufferGeometry,\n\tDodecahedronGeometry: DodecahedronGeometry,\n\tDodecahedronBufferGeometry: DodecahedronBufferGeometry,\n\tPolyhedronGeometry: PolyhedronGeometry,\n\tPolyhedronBufferGeometry: PolyhedronBufferGeometry,\n\tTubeGeometry: TubeGeometry,\n\tTubeBufferGeometry: TubeBufferGeometry,\n\tTorusKnotGeometry: TorusKnotGeometry,\n\tTorusKnotBufferGeometry: TorusKnotBufferGeometry,\n\tTorusGeometry: TorusGeometry,\n\tTorusBufferGeometry: TorusBufferGeometry,\n\tTextGeometry: TextGeometry,\n\tTextBufferGeometry: TextBufferGeometry,\n\tSphereGeometry: SphereGeometry,\n\tSphereBufferGeometry: SphereBufferGeometry,\n\tRingGeometry: RingGeometry,\n\tRingBufferGeometry: RingBufferGeometry,\n\tPlaneGeometry: PlaneGeometry,\n\tPlaneBufferGeometry: PlaneBufferGeometry,\n\tLatheGeometry: LatheGeometry,\n\tLatheBufferGeometry: LatheBufferGeometry,\n\tShapeGeometry: ShapeGeometry,\n\tShapeBufferGeometry: ShapeBufferGeometry,\n\tExtrudeGeometry: ExtrudeGeometry,\n\tExtrudeBufferGeometry: ExtrudeBufferGeometry,\n\tEdgesGeometry: EdgesGeometry,\n\tConeGeometry: ConeGeometry,\n\tConeBufferGeometry: ConeBufferGeometry,\n\tCylinderGeometry: CylinderGeometry,\n\tCylinderBufferGeometry: CylinderBufferGeometry,\n\tCircleGeometry: CircleGeometry,\n\tCircleBufferGeometry: CircleBufferGeometry,\n\tBoxGeometry: BoxGeometry,\n\tBoxBufferGeometry: BoxBufferGeometry\n});\n\n/**\n * @author mrdoob / http://mrdoob.com/\n *\n * parameters = {\n *  color: <THREE.Color>\n * }\n */\n\nfunction ShadowMaterial( parameters ) {\n\n\tMaterial.call( this );\n\n\tthis.type = 'ShadowMaterial';\n\n\tthis.color = new Color( 0x000000 );\n\tthis.transparent = true;\n\n\tthis.setValues( parameters );\n\n}\n\nShadowMaterial.prototype = Object.create( Material.prototype );\nShadowMaterial.prototype.constructor = ShadowMaterial;\n\nShadowMaterial.prototype.isShadowMaterial = true;\n\nShadowMaterial.prototype.copy = function ( source ) {\n\n\tMaterial.prototype.copy.call( this, source );\n\n\tthis.color.copy( source.color );\n\n\treturn this;\n\n};\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction RawShaderMaterial( parameters ) {\n\n\tShaderMaterial.call( this, parameters );\n\n\tthis.type = 'RawShaderMaterial';\n\n}\n\nRawShaderMaterial.prototype = Object.create( ShaderMaterial.prototype );\nRawShaderMaterial.prototype.constructor = RawShaderMaterial;\n\nRawShaderMaterial.prototype.isRawShaderMaterial = true;\n\n/**\n * @author WestLangley / http://github.com/WestLangley\n *\n * parameters = {\n *  color: <hex>,\n *  roughness: <float>,\n *  metalness: <float>,\n *  opacity: <float>,\n *\n *  map: new THREE.Texture( <Image> ),\n *\n *  lightMap: new THREE.Texture( <Image> ),\n *  lightMapIntensity: <float>\n *\n *  aoMap: new THREE.Texture( <Image> ),\n *  aoMapIntensity: <float>\n *\n *  emissive: <hex>,\n *  emissiveIntensity: <float>\n *  emissiveMap: new THREE.Texture( <Image> ),\n *\n *  bumpMap: new THREE.Texture( <Image> ),\n *  bumpScale: <float>,\n *\n *  normalMap: new THREE.Texture( <Image> ),\n *  normalMapType: THREE.TangentSpaceNormalMap,\n *  normalScale: <Vector2>,\n *\n *  displacementMap: new THREE.Texture( <Image> ),\n *  displacementScale: <float>,\n *  displacementBias: <float>,\n *\n *  roughnessMap: new THREE.Texture( <Image> ),\n *\n *  metalnessMap: new THREE.Texture( <Image> ),\n *\n *  alphaMap: new THREE.Texture( <Image> ),\n *\n *  envMap: new THREE.CubeTexture( [posx, negx, posy, negy, posz, negz] ),\n *  envMapIntensity: <float>\n *\n *  refractionRatio: <float>,\n *\n *  wireframe: <boolean>,\n *  wireframeLinewidth: <float>,\n *\n *  skinning: <bool>,\n *  morphTargets: <bool>,\n *  morphNormals: <bool>\n * }\n */\n\nfunction MeshStandardMaterial( parameters ) {\n\n\tMaterial.call( this );\n\n\tthis.defines = { 'STANDARD': '' };\n\n\tthis.type = 'MeshStandardMaterial';\n\n\tthis.color = new Color( 0xffffff ); // diffuse\n\tthis.roughness = 1.0;\n\tthis.metalness = 0.0;\n\n\tthis.map = null;\n\n\tthis.lightMap = null;\n\tthis.lightMapIntensity = 1.0;\n\n\tthis.aoMap = null;\n\tthis.aoMapIntensity = 1.0;\n\n\tthis.emissive = new Color( 0x000000 );\n\tthis.emissiveIntensity = 1.0;\n\tthis.emissiveMap = null;\n\n\tthis.bumpMap = null;\n\tthis.bumpScale = 1;\n\n\tthis.normalMap = null;\n\tthis.normalMapType = TangentSpaceNormalMap;\n\tthis.normalScale = new Vector2( 1, 1 );\n\n\tthis.displacementMap = null;\n\tthis.displacementScale = 1;\n\tthis.displacementBias = 0;\n\n\tthis.roughnessMap = null;\n\n\tthis.metalnessMap = null;\n\n\tthis.alphaMap = null;\n\n\tthis.envMap = null;\n\tthis.envMapIntensity = 1.0;\n\n\tthis.refractionRatio = 0.98;\n\n\tthis.wireframe = false;\n\tthis.wireframeLinewidth = 1;\n\tthis.wireframeLinecap = 'round';\n\tthis.wireframeLinejoin = 'round';\n\n\tthis.skinning = false;\n\tthis.morphTargets = false;\n\tthis.morphNormals = false;\n\n\tthis.vertexTangents = false;\n\n\tthis.setValues( parameters );\n\n}\n\nMeshStandardMaterial.prototype = Object.create( Material.prototype );\nMeshStandardMaterial.prototype.constructor = MeshStandardMaterial;\n\nMeshStandardMaterial.prototype.isMeshStandardMaterial = true;\n\nMeshStandardMaterial.prototype.copy = function ( source ) {\n\n\tMaterial.prototype.copy.call( this, source );\n\n\tthis.defines = { 'STANDARD': '' };\n\n\tthis.color.copy( source.color );\n\tthis.roughness = source.roughness;\n\tthis.metalness = source.metalness;\n\n\tthis.map = source.map;\n\n\tthis.lightMap = source.lightMap;\n\tthis.lightMapIntensity = source.lightMapIntensity;\n\n\tthis.aoMap = source.aoMap;\n\tthis.aoMapIntensity = source.aoMapIntensity;\n\n\tthis.emissive.copy( source.emissive );\n\tthis.emissiveMap = source.emissiveMap;\n\tthis.emissiveIntensity = source.emissiveIntensity;\n\n\tthis.bumpMap = source.bumpMap;\n\tthis.bumpScale = source.bumpScale;\n\n\tthis.normalMap = source.normalMap;\n\tthis.normalMapType = source.normalMapType;\n\tthis.normalScale.copy( source.normalScale );\n\n\tthis.displacementMap = source.displacementMap;\n\tthis.displacementScale = source.displacementScale;\n\tthis.displacementBias = source.displacementBias;\n\n\tthis.roughnessMap = source.roughnessMap;\n\n\tthis.metalnessMap = source.metalnessMap;\n\n\tthis.alphaMap = source.alphaMap;\n\n\tthis.envMap = source.envMap;\n\tthis.envMapIntensity = source.envMapIntensity;\n\n\tthis.refractionRatio = source.refractionRatio;\n\n\tthis.wireframe = source.wireframe;\n\tthis.wireframeLinewidth = source.wireframeLinewidth;\n\tthis.wireframeLinecap = source.wireframeLinecap;\n\tthis.wireframeLinejoin = source.wireframeLinejoin;\n\n\tthis.skinning = source.skinning;\n\tthis.morphTargets = source.morphTargets;\n\tthis.morphNormals = source.morphNormals;\n\n\tthis.vertexTangents = source.vertexTangents;\n\n\treturn this;\n\n};\n\n/**\n * @author WestLangley / http://github.com/WestLangley\n *\n * parameters = {\n *  reflectivity: <float>\n *  clearcoat: <float>\n *  clearcoatRoughness: <float>\n *\n *  sheen: <Color>\n *\n *  clearcoatNormalScale: <Vector2>,\n *  clearcoatNormalMap: new THREE.Texture( <Image> ),\n * }\n */\n\nfunction MeshPhysicalMaterial( parameters ) {\n\n\tMeshStandardMaterial.call( this );\n\n\tthis.defines = {\n\n\t\t'STANDARD': '',\n\t\t'PHYSICAL': ''\n\n\t};\n\n\tthis.type = 'MeshPhysicalMaterial';\n\n\tthis.reflectivity = 0.5; // maps to F0 = 0.04\n\n\tthis.clearcoat = 0.0;\n\tthis.clearcoatRoughness = 0.0;\n\n\tthis.sheen = null; // null will disable sheen bsdf\n\n\tthis.clearcoatNormalScale = new Vector2( 1, 1 );\n\tthis.clearcoatNormalMap = null;\n\n\tthis.transparency = 0.0;\n\n\tthis.setValues( parameters );\n\n}\n\nMeshPhysicalMaterial.prototype = Object.create( MeshStandardMaterial.prototype );\nMeshPhysicalMaterial.prototype.constructor = MeshPhysicalMaterial;\n\nMeshPhysicalMaterial.prototype.isMeshPhysicalMaterial = true;\n\nMeshPhysicalMaterial.prototype.copy = function ( source ) {\n\n\tMeshStandardMaterial.prototype.copy.call( this, source );\n\n\tthis.defines = {\n\n\t\t'STANDARD': '',\n\t\t'PHYSICAL': ''\n\n\t};\n\n\tthis.reflectivity = source.reflectivity;\n\n\tthis.clearcoat = source.clearcoat;\n\tthis.clearcoatRoughness = source.clearcoatRoughness;\n\n\tif ( source.sheen ) this.sheen = ( this.sheen || new Color() ).copy( source.sheen );\n\telse this.sheen = null;\n\n\tthis.clearcoatNormalMap = source.clearcoatNormalMap;\n\tthis.clearcoatNormalScale.copy( source.clearcoatNormalScale );\n\n\tthis.transparency = source.transparency;\n\n\treturn this;\n\n};\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n *\n * parameters = {\n *  color: <hex>,\n *  specular: <hex>,\n *  shininess: <float>,\n *  opacity: <float>,\n *\n *  map: new THREE.Texture( <Image> ),\n *\n *  lightMap: new THREE.Texture( <Image> ),\n *  lightMapIntensity: <float>\n *\n *  aoMap: new THREE.Texture( <Image> ),\n *  aoMapIntensity: <float>\n *\n *  emissive: <hex>,\n *  emissiveIntensity: <float>\n *  emissiveMap: new THREE.Texture( <Image> ),\n *\n *  bumpMap: new THREE.Texture( <Image> ),\n *  bumpScale: <float>,\n *\n *  normalMap: new THREE.Texture( <Image> ),\n *  normalMapType: THREE.TangentSpaceNormalMap,\n *  normalScale: <Vector2>,\n *\n *  displacementMap: new THREE.Texture( <Image> ),\n *  displacementScale: <float>,\n *  displacementBias: <float>,\n *\n *  specularMap: new THREE.Texture( <Image> ),\n *\n *  alphaMap: new THREE.Texture( <Image> ),\n *\n *  envMap: new THREE.CubeTexture( [posx, negx, posy, negy, posz, negz] ),\n *  combine: THREE.MultiplyOperation,\n *  reflectivity: <float>,\n *  refractionRatio: <float>,\n *\n *  wireframe: <boolean>,\n *  wireframeLinewidth: <float>,\n *\n *  skinning: <bool>,\n *  morphTargets: <bool>,\n *  morphNormals: <bool>\n * }\n */\n\nfunction MeshPhongMaterial( parameters ) {\n\n\tMaterial.call( this );\n\n\tthis.type = 'MeshPhongMaterial';\n\n\tthis.color = new Color( 0xffffff ); // diffuse\n\tthis.specular = new Color( 0x111111 );\n\tthis.shininess = 30;\n\n\tthis.map = null;\n\n\tthis.lightMap = null;\n\tthis.lightMapIntensity = 1.0;\n\n\tthis.aoMap = null;\n\tthis.aoMapIntensity = 1.0;\n\n\tthis.emissive = new Color( 0x000000 );\n\tthis.emissiveIntensity = 1.0;\n\tthis.emissiveMap = null;\n\n\tthis.bumpMap = null;\n\tthis.bumpScale = 1;\n\n\tthis.normalMap = null;\n\tthis.normalMapType = TangentSpaceNormalMap;\n\tthis.normalScale = new Vector2( 1, 1 );\n\n\tthis.displacementMap = null;\n\tthis.displacementScale = 1;\n\tthis.displacementBias = 0;\n\n\tthis.specularMap = null;\n\n\tthis.alphaMap = null;\n\n\tthis.envMap = null;\n\tthis.combine = MultiplyOperation;\n\tthis.reflectivity = 1;\n\tthis.refractionRatio = 0.98;\n\n\tthis.wireframe = false;\n\tthis.wireframeLinewidth = 1;\n\tthis.wireframeLinecap = 'round';\n\tthis.wireframeLinejoin = 'round';\n\n\tthis.skinning = false;\n\tthis.morphTargets = false;\n\tthis.morphNormals = false;\n\n\tthis.setValues( parameters );\n\n}\n\nMeshPhongMaterial.prototype = Object.create( Material.prototype );\nMeshPhongMaterial.prototype.constructor = MeshPhongMaterial;\n\nMeshPhongMaterial.prototype.isMeshPhongMaterial = true;\n\nMeshPhongMaterial.prototype.copy = function ( source ) {\n\n\tMaterial.prototype.copy.call( this, source );\n\n\tthis.color.copy( source.color );\n\tthis.specular.copy( source.specular );\n\tthis.shininess = source.shininess;\n\n\tthis.map = source.map;\n\n\tthis.lightMap = source.lightMap;\n\tthis.lightMapIntensity = source.lightMapIntensity;\n\n\tthis.aoMap = source.aoMap;\n\tthis.aoMapIntensity = source.aoMapIntensity;\n\n\tthis.emissive.copy( source.emissive );\n\tthis.emissiveMap = source.emissiveMap;\n\tthis.emissiveIntensity = source.emissiveIntensity;\n\n\tthis.bumpMap = source.bumpMap;\n\tthis.bumpScale = source.bumpScale;\n\n\tthis.normalMap = source.normalMap;\n\tthis.normalMapType = source.normalMapType;\n\tthis.normalScale.copy( source.normalScale );\n\n\tthis.displacementMap = source.displacementMap;\n\tthis.displacementScale = source.displacementScale;\n\tthis.displacementBias = source.displacementBias;\n\n\tthis.specularMap = source.specularMap;\n\n\tthis.alphaMap = source.alphaMap;\n\n\tthis.envMap = source.envMap;\n\tthis.combine = source.combine;\n\tthis.reflectivity = source.reflectivity;\n\tthis.refractionRatio = source.refractionRatio;\n\n\tthis.wireframe = source.wireframe;\n\tthis.wireframeLinewidth = source.wireframeLinewidth;\n\tthis.wireframeLinecap = source.wireframeLinecap;\n\tthis.wireframeLinejoin = source.wireframeLinejoin;\n\n\tthis.skinning = source.skinning;\n\tthis.morphTargets = source.morphTargets;\n\tthis.morphNormals = source.morphNormals;\n\n\treturn this;\n\n};\n\n/**\n * @author takahirox / http://github.com/takahirox\n *\n * parameters = {\n *  color: <hex>,\n *  specular: <hex>,\n *  shininess: <float>,\n *\n *  map: new THREE.Texture( <Image> ),\n *  gradientMap: new THREE.Texture( <Image> ),\n *\n *  lightMap: new THREE.Texture( <Image> ),\n *  lightMapIntensity: <float>\n *\n *  aoMap: new THREE.Texture( <Image> ),\n *  aoMapIntensity: <float>\n *\n *  emissive: <hex>,\n *  emissiveIntensity: <float>\n *  emissiveMap: new THREE.Texture( <Image> ),\n *\n *  bumpMap: new THREE.Texture( <Image> ),\n *  bumpScale: <float>,\n *\n *  normalMap: new THREE.Texture( <Image> ),\n *  normalMapType: THREE.TangentSpaceNormalMap,\n *  normalScale: <Vector2>,\n *\n *  displacementMap: new THREE.Texture( <Image> ),\n *  displacementScale: <float>,\n *  displacementBias: <float>,\n *\n *  specularMap: new THREE.Texture( <Image> ),\n *\n *  alphaMap: new THREE.Texture( <Image> ),\n *\n *  wireframe: <boolean>,\n *  wireframeLinewidth: <float>,\n *\n *  skinning: <bool>,\n *  morphTargets: <bool>,\n *  morphNormals: <bool>\n * }\n */\n\nfunction MeshToonMaterial( parameters ) {\n\n\tMaterial.call( this );\n\n\tthis.defines = { 'TOON': '' };\n\n\tthis.type = 'MeshToonMaterial';\n\n\tthis.color = new Color( 0xffffff );\n\tthis.specular = new Color( 0x111111 );\n\tthis.shininess = 30;\n\n\tthis.map = null;\n\tthis.gradientMap = null;\n\n\tthis.lightMap = null;\n\tthis.lightMapIntensity = 1.0;\n\n\tthis.aoMap = null;\n\tthis.aoMapIntensity = 1.0;\n\n\tthis.emissive = new Color( 0x000000 );\n\tthis.emissiveIntensity = 1.0;\n\tthis.emissiveMap = null;\n\n\tthis.bumpMap = null;\n\tthis.bumpScale = 1;\n\n\tthis.normalMap = null;\n\tthis.normalMapType = TangentSpaceNormalMap;\n\tthis.normalScale = new Vector2( 1, 1 );\n\n\tthis.displacementMap = null;\n\tthis.displacementScale = 1;\n\tthis.displacementBias = 0;\n\n\tthis.specularMap = null;\n\n\tthis.alphaMap = null;\n\n\tthis.wireframe = false;\n\tthis.wireframeLinewidth = 1;\n\tthis.wireframeLinecap = 'round';\n\tthis.wireframeLinejoin = 'round';\n\n\tthis.skinning = false;\n\tthis.morphTargets = false;\n\tthis.morphNormals = false;\n\n\tthis.setValues( parameters );\n\n}\n\nMeshToonMaterial.prototype = Object.create( Material.prototype );\nMeshToonMaterial.prototype.constructor = MeshToonMaterial;\n\nMeshToonMaterial.prototype.isMeshToonMaterial = true;\n\nMeshToonMaterial.prototype.copy = function ( source ) {\n\n\tMaterial.prototype.copy.call( this, source );\n\n\tthis.color.copy( source.color );\n\tthis.specular.copy( source.specular );\n\tthis.shininess = source.shininess;\n\n\tthis.map = source.map;\n\tthis.gradientMap = source.gradientMap;\n\n\tthis.lightMap = source.lightMap;\n\tthis.lightMapIntensity = source.lightMapIntensity;\n\n\tthis.aoMap = source.aoMap;\n\tthis.aoMapIntensity = source.aoMapIntensity;\n\n\tthis.emissive.copy( source.emissive );\n\tthis.emissiveMap = source.emissiveMap;\n\tthis.emissiveIntensity = source.emissiveIntensity;\n\n\tthis.bumpMap = source.bumpMap;\n\tthis.bumpScale = source.bumpScale;\n\n\tthis.normalMap = source.normalMap;\n\tthis.normalMapType = source.normalMapType;\n\tthis.normalScale.copy( source.normalScale );\n\n\tthis.displacementMap = source.displacementMap;\n\tthis.displacementScale = source.displacementScale;\n\tthis.displacementBias = source.displacementBias;\n\n\tthis.specularMap = source.specularMap;\n\n\tthis.alphaMap = source.alphaMap;\n\n\tthis.wireframe = source.wireframe;\n\tthis.wireframeLinewidth = source.wireframeLinewidth;\n\tthis.wireframeLinecap = source.wireframeLinecap;\n\tthis.wireframeLinejoin = source.wireframeLinejoin;\n\n\tthis.skinning = source.skinning;\n\tthis.morphTargets = source.morphTargets;\n\tthis.morphNormals = source.morphNormals;\n\n\treturn this;\n\n};\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author WestLangley / http://github.com/WestLangley\n *\n * parameters = {\n *  opacity: <float>,\n *\n *  bumpMap: new THREE.Texture( <Image> ),\n *  bumpScale: <float>,\n *\n *  normalMap: new THREE.Texture( <Image> ),\n *  normalMapType: THREE.TangentSpaceNormalMap,\n *  normalScale: <Vector2>,\n *\n *  displacementMap: new THREE.Texture( <Image> ),\n *  displacementScale: <float>,\n *  displacementBias: <float>,\n *\n *  wireframe: <boolean>,\n *  wireframeLinewidth: <float>\n *\n *  skinning: <bool>,\n *  morphTargets: <bool>,\n *  morphNormals: <bool>\n * }\n */\n\nfunction MeshNormalMaterial( parameters ) {\n\n\tMaterial.call( this );\n\n\tthis.type = 'MeshNormalMaterial';\n\n\tthis.bumpMap = null;\n\tthis.bumpScale = 1;\n\n\tthis.normalMap = null;\n\tthis.normalMapType = TangentSpaceNormalMap;\n\tthis.normalScale = new Vector2( 1, 1 );\n\n\tthis.displacementMap = null;\n\tthis.displacementScale = 1;\n\tthis.displacementBias = 0;\n\n\tthis.wireframe = false;\n\tthis.wireframeLinewidth = 1;\n\n\tthis.fog = false;\n\n\tthis.skinning = false;\n\tthis.morphTargets = false;\n\tthis.morphNormals = false;\n\n\tthis.setValues( parameters );\n\n}\n\nMeshNormalMaterial.prototype = Object.create( Material.prototype );\nMeshNormalMaterial.prototype.constructor = MeshNormalMaterial;\n\nMeshNormalMaterial.prototype.isMeshNormalMaterial = true;\n\nMeshNormalMaterial.prototype.copy = function ( source ) {\n\n\tMaterial.prototype.copy.call( this, source );\n\n\tthis.bumpMap = source.bumpMap;\n\tthis.bumpScale = source.bumpScale;\n\n\tthis.normalMap = source.normalMap;\n\tthis.normalMapType = source.normalMapType;\n\tthis.normalScale.copy( source.normalScale );\n\n\tthis.displacementMap = source.displacementMap;\n\tthis.displacementScale = source.displacementScale;\n\tthis.displacementBias = source.displacementBias;\n\n\tthis.wireframe = source.wireframe;\n\tthis.wireframeLinewidth = source.wireframeLinewidth;\n\n\tthis.skinning = source.skinning;\n\tthis.morphTargets = source.morphTargets;\n\tthis.morphNormals = source.morphNormals;\n\n\treturn this;\n\n};\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n *\n * parameters = {\n *  color: <hex>,\n *  opacity: <float>,\n *\n *  map: new THREE.Texture( <Image> ),\n *\n *  lightMap: new THREE.Texture( <Image> ),\n *  lightMapIntensity: <float>\n *\n *  aoMap: new THREE.Texture( <Image> ),\n *  aoMapIntensity: <float>\n *\n *  emissive: <hex>,\n *  emissiveIntensity: <float>\n *  emissiveMap: new THREE.Texture( <Image> ),\n *\n *  specularMap: new THREE.Texture( <Image> ),\n *\n *  alphaMap: new THREE.Texture( <Image> ),\n *\n *  envMap: new THREE.CubeTexture( [posx, negx, posy, negy, posz, negz] ),\n *  combine: THREE.Multiply,\n *  reflectivity: <float>,\n *  refractionRatio: <float>,\n *\n *  wireframe: <boolean>,\n *  wireframeLinewidth: <float>,\n *\n *  skinning: <bool>,\n *  morphTargets: <bool>,\n *  morphNormals: <bool>\n * }\n */\n\nfunction MeshLambertMaterial( parameters ) {\n\n\tMaterial.call( this );\n\n\tthis.type = 'MeshLambertMaterial';\n\n\tthis.color = new Color( 0xffffff ); // diffuse\n\n\tthis.map = null;\n\n\tthis.lightMap = null;\n\tthis.lightMapIntensity = 1.0;\n\n\tthis.aoMap = null;\n\tthis.aoMapIntensity = 1.0;\n\n\tthis.emissive = new Color( 0x000000 );\n\tthis.emissiveIntensity = 1.0;\n\tthis.emissiveMap = null;\n\n\tthis.specularMap = null;\n\n\tthis.alphaMap = null;\n\n\tthis.envMap = null;\n\tthis.combine = MultiplyOperation;\n\tthis.reflectivity = 1;\n\tthis.refractionRatio = 0.98;\n\n\tthis.wireframe = false;\n\tthis.wireframeLinewidth = 1;\n\tthis.wireframeLinecap = 'round';\n\tthis.wireframeLinejoin = 'round';\n\n\tthis.skinning = false;\n\tthis.morphTargets = false;\n\tthis.morphNormals = false;\n\n\tthis.setValues( parameters );\n\n}\n\nMeshLambertMaterial.prototype = Object.create( Material.prototype );\nMeshLambertMaterial.prototype.constructor = MeshLambertMaterial;\n\nMeshLambertMaterial.prototype.isMeshLambertMaterial = true;\n\nMeshLambertMaterial.prototype.copy = function ( source ) {\n\n\tMaterial.prototype.copy.call( this, source );\n\n\tthis.color.copy( source.color );\n\n\tthis.map = source.map;\n\n\tthis.lightMap = source.lightMap;\n\tthis.lightMapIntensity = source.lightMapIntensity;\n\n\tthis.aoMap = source.aoMap;\n\tthis.aoMapIntensity = source.aoMapIntensity;\n\n\tthis.emissive.copy( source.emissive );\n\tthis.emissiveMap = source.emissiveMap;\n\tthis.emissiveIntensity = source.emissiveIntensity;\n\n\tthis.specularMap = source.specularMap;\n\n\tthis.alphaMap = source.alphaMap;\n\n\tthis.envMap = source.envMap;\n\tthis.combine = source.combine;\n\tthis.reflectivity = source.reflectivity;\n\tthis.refractionRatio = source.refractionRatio;\n\n\tthis.wireframe = source.wireframe;\n\tthis.wireframeLinewidth = source.wireframeLinewidth;\n\tthis.wireframeLinecap = source.wireframeLinecap;\n\tthis.wireframeLinejoin = source.wireframeLinejoin;\n\n\tthis.skinning = source.skinning;\n\tthis.morphTargets = source.morphTargets;\n\tthis.morphNormals = source.morphNormals;\n\n\treturn this;\n\n};\n\n/**\n * @author WestLangley / http://github.com/WestLangley\n *\n * parameters = {\n *  color: <hex>,\n *  opacity: <float>,\n *\n *  matcap: new THREE.Texture( <Image> ),\n *\n *  map: new THREE.Texture( <Image> ),\n *\n *  bumpMap: new THREE.Texture( <Image> ),\n *  bumpScale: <float>,\n *\n *  normalMap: new THREE.Texture( <Image> ),\n *  normalMapType: THREE.TangentSpaceNormalMap,\n *  normalScale: <Vector2>,\n *\n *  displacementMap: new THREE.Texture( <Image> ),\n *  displacementScale: <float>,\n *  displacementBias: <float>,\n *\n *  alphaMap: new THREE.Texture( <Image> ),\n *\n *  skinning: <bool>,\n *  morphTargets: <bool>,\n *  morphNormals: <bool>\n * }\n */\n\nfunction MeshMatcapMaterial( parameters ) {\n\n\tMaterial.call( this );\n\n\tthis.defines = { 'MATCAP': '' };\n\n\tthis.type = 'MeshMatcapMaterial';\n\n\tthis.color = new Color( 0xffffff ); // diffuse\n\n\tthis.matcap = null;\n\n\tthis.map = null;\n\n\tthis.bumpMap = null;\n\tthis.bumpScale = 1;\n\n\tthis.normalMap = null;\n\tthis.normalMapType = TangentSpaceNormalMap;\n\tthis.normalScale = new Vector2( 1, 1 );\n\n\tthis.displacementMap = null;\n\tthis.displacementScale = 1;\n\tthis.displacementBias = 0;\n\n\tthis.alphaMap = null;\n\n\tthis.skinning = false;\n\tthis.morphTargets = false;\n\tthis.morphNormals = false;\n\n\tthis.setValues( parameters );\n\n}\n\nMeshMatcapMaterial.prototype = Object.create( Material.prototype );\nMeshMatcapMaterial.prototype.constructor = MeshMatcapMaterial;\n\nMeshMatcapMaterial.prototype.isMeshMatcapMaterial = true;\n\nMeshMatcapMaterial.prototype.copy = function ( source ) {\n\n\tMaterial.prototype.copy.call( this, source );\n\n\tthis.defines = { 'MATCAP': '' };\n\n\tthis.color.copy( source.color );\n\n\tthis.matcap = source.matcap;\n\n\tthis.map = source.map;\n\n\tthis.bumpMap = source.bumpMap;\n\tthis.bumpScale = source.bumpScale;\n\n\tthis.normalMap = source.normalMap;\n\tthis.normalMapType = source.normalMapType;\n\tthis.normalScale.copy( source.normalScale );\n\n\tthis.displacementMap = source.displacementMap;\n\tthis.displacementScale = source.displacementScale;\n\tthis.displacementBias = source.displacementBias;\n\n\tthis.alphaMap = source.alphaMap;\n\n\tthis.skinning = source.skinning;\n\tthis.morphTargets = source.morphTargets;\n\tthis.morphNormals = source.morphNormals;\n\n\treturn this;\n\n};\n\n/**\n * @author alteredq / http://alteredqualia.com/\n *\n * parameters = {\n *  color: <hex>,\n *  opacity: <float>,\n *\n *  linewidth: <float>,\n *\n *  scale: <float>,\n *  dashSize: <float>,\n *  gapSize: <float>\n * }\n */\n\nfunction LineDashedMaterial( parameters ) {\n\n\tLineBasicMaterial.call( this );\n\n\tthis.type = 'LineDashedMaterial';\n\n\tthis.scale = 1;\n\tthis.dashSize = 3;\n\tthis.gapSize = 1;\n\n\tthis.setValues( parameters );\n\n}\n\nLineDashedMaterial.prototype = Object.create( LineBasicMaterial.prototype );\nLineDashedMaterial.prototype.constructor = LineDashedMaterial;\n\nLineDashedMaterial.prototype.isLineDashedMaterial = true;\n\nLineDashedMaterial.prototype.copy = function ( source ) {\n\n\tLineBasicMaterial.prototype.copy.call( this, source );\n\n\tthis.scale = source.scale;\n\tthis.dashSize = source.dashSize;\n\tthis.gapSize = source.gapSize;\n\n\treturn this;\n\n};\n\n\n\nvar Materials = /*#__PURE__*/Object.freeze({\n\t__proto__: null,\n\tShadowMaterial: ShadowMaterial,\n\tSpriteMaterial: SpriteMaterial,\n\tRawShaderMaterial: RawShaderMaterial,\n\tShaderMaterial: ShaderMaterial,\n\tPointsMaterial: PointsMaterial,\n\tMeshPhysicalMaterial: MeshPhysicalMaterial,\n\tMeshStandardMaterial: MeshStandardMaterial,\n\tMeshPhongMaterial: MeshPhongMaterial,\n\tMeshToonMaterial: MeshToonMaterial,\n\tMeshNormalMaterial: MeshNormalMaterial,\n\tMeshLambertMaterial: MeshLambertMaterial,\n\tMeshDepthMaterial: MeshDepthMaterial,\n\tMeshDistanceMaterial: MeshDistanceMaterial,\n\tMeshBasicMaterial: MeshBasicMaterial,\n\tMeshMatcapMaterial: MeshMatcapMaterial,\n\tLineDashedMaterial: LineDashedMaterial,\n\tLineBasicMaterial: LineBasicMaterial,\n\tMaterial: Material\n});\n\n/**\n * @author tschw\n * @author Ben Houston / http://clara.io/\n * @author David Sarno / http://lighthaus.us/\n */\n\nvar AnimationUtils = {\n\n\t// same as Array.prototype.slice, but also works on typed arrays\n\tarraySlice: function ( array, from, to ) {\n\n\t\tif ( AnimationUtils.isTypedArray( array ) ) {\n\n\t\t\t// in ios9 array.subarray(from, undefined) will return empty array\n\t\t\t// but array.subarray(from) or array.subarray(from, len) is correct\n\t\t\treturn new array.constructor( array.subarray( from, to !== undefined ? to : array.length ) );\n\n\t\t}\n\n\t\treturn array.slice( from, to );\n\n\t},\n\n\t// converts an array to a specific type\n\tconvertArray: function ( array, type, forceClone ) {\n\n\t\tif ( ! array || // let 'undefined' and 'null' pass\n\t\t\t! forceClone && array.constructor === type ) return array;\n\n\t\tif ( typeof type.BYTES_PER_ELEMENT === 'number' ) {\n\n\t\t\treturn new type( array ); // create typed array\n\n\t\t}\n\n\t\treturn Array.prototype.slice.call( array ); // create Array\n\n\t},\n\n\tisTypedArray: function ( object ) {\n\n\t\treturn ArrayBuffer.isView( object ) &&\n\t\t\t! ( object instanceof DataView );\n\n\t},\n\n\t// returns an array by which times and values can be sorted\n\tgetKeyframeOrder: function ( times ) {\n\n\t\tfunction compareTime( i, j ) {\n\n\t\t\treturn times[ i ] - times[ j ];\n\n\t\t}\n\n\t\tvar n = times.length;\n\t\tvar result = new Array( n );\n\t\tfor ( var i = 0; i !== n; ++ i ) result[ i ] = i;\n\n\t\tresult.sort( compareTime );\n\n\t\treturn result;\n\n\t},\n\n\t// uses the array previously returned by 'getKeyframeOrder' to sort data\n\tsortedArray: function ( values, stride, order ) {\n\n\t\tvar nValues = values.length;\n\t\tvar result = new values.constructor( nValues );\n\n\t\tfor ( var i = 0, dstOffset = 0; dstOffset !== nValues; ++ i ) {\n\n\t\t\tvar srcOffset = order[ i ] * stride;\n\n\t\t\tfor ( var j = 0; j !== stride; ++ j ) {\n\n\t\t\t\tresult[ dstOffset ++ ] = values[ srcOffset + j ];\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn result;\n\n\t},\n\n\t// function for parsing AOS keyframe formats\n\tflattenJSON: function ( jsonKeys, times, values, valuePropertyName ) {\n\n\t\tvar i = 1, key = jsonKeys[ 0 ];\n\n\t\twhile ( key !== undefined && key[ valuePropertyName ] === undefined ) {\n\n\t\t\tkey = jsonKeys[ i ++ ];\n\n\t\t}\n\n\t\tif ( key === undefined ) return; // no data\n\n\t\tvar value = key[ valuePropertyName ];\n\t\tif ( value === undefined ) return; // no data\n\n\t\tif ( Array.isArray( value ) ) {\n\n\t\t\tdo {\n\n\t\t\t\tvalue = key[ valuePropertyName ];\n\n\t\t\t\tif ( value !== undefined ) {\n\n\t\t\t\t\ttimes.push( key.time );\n\t\t\t\t\tvalues.push.apply( values, value ); // push all elements\n\n\t\t\t\t}\n\n\t\t\t\tkey = jsonKeys[ i ++ ];\n\n\t\t\t} while ( key !== undefined );\n\n\t\t} else if ( value.toArray !== undefined ) {\n\n\t\t\t// ...assume THREE.Math-ish\n\n\t\t\tdo {\n\n\t\t\t\tvalue = key[ valuePropertyName ];\n\n\t\t\t\tif ( value !== undefined ) {\n\n\t\t\t\t\ttimes.push( key.time );\n\t\t\t\t\tvalue.toArray( values, values.length );\n\n\t\t\t\t}\n\n\t\t\t\tkey = jsonKeys[ i ++ ];\n\n\t\t\t} while ( key !== undefined );\n\n\t\t} else {\n\n\t\t\t// otherwise push as-is\n\n\t\t\tdo {\n\n\t\t\t\tvalue = key[ valuePropertyName ];\n\n\t\t\t\tif ( value !== undefined ) {\n\n\t\t\t\t\ttimes.push( key.time );\n\t\t\t\t\tvalues.push( value );\n\n\t\t\t\t}\n\n\t\t\t\tkey = jsonKeys[ i ++ ];\n\n\t\t\t} while ( key !== undefined );\n\n\t\t}\n\n\t},\n\n\tsubclip: function ( sourceClip, name, startFrame, endFrame, fps ) {\n\n\t\tfps = fps || 30;\n\n\t\tvar clip = sourceClip.clone();\n\n\t\tclip.name = name;\n\n\t\tvar tracks = [];\n\n\t\tfor ( var i = 0; i < clip.tracks.length; ++ i ) {\n\n\t\t\tvar track = clip.tracks[ i ];\n\t\t\tvar valueSize = track.getValueSize();\n\n\t\t\tvar times = [];\n\t\t\tvar values = [];\n\n\t\t\tfor ( var j = 0; j < track.times.length; ++ j ) {\n\n\t\t\t\tvar frame = track.times[ j ] * fps;\n\n\t\t\t\tif ( frame < startFrame || frame >= endFrame ) continue;\n\n\t\t\t\ttimes.push( track.times[ j ] );\n\n\t\t\t\tfor ( var k = 0; k < valueSize; ++ k ) {\n\n\t\t\t\t\tvalues.push( track.values[ j * valueSize + k ] );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tif ( times.length === 0 ) continue;\n\n\t\t\ttrack.times = AnimationUtils.convertArray( times, track.times.constructor );\n\t\t\ttrack.values = AnimationUtils.convertArray( values, track.values.constructor );\n\n\t\t\ttracks.push( track );\n\n\t\t}\n\n\t\tclip.tracks = tracks;\n\n\t\t// find minimum .times value across all tracks in the trimmed clip\n\n\t\tvar minStartTime = Infinity;\n\n\t\tfor ( var i = 0; i < clip.tracks.length; ++ i ) {\n\n\t\t\tif ( minStartTime > clip.tracks[ i ].times[ 0 ] ) {\n\n\t\t\t\tminStartTime = clip.tracks[ i ].times[ 0 ];\n\n\t\t\t}\n\n\t\t}\n\n\t\t// shift all tracks such that clip begins at t=0\n\n\t\tfor ( var i = 0; i < clip.tracks.length; ++ i ) {\n\n\t\t\tclip.tracks[ i ].shift( - 1 * minStartTime );\n\n\t\t}\n\n\t\tclip.resetDuration();\n\n\t\treturn clip;\n\n\t}\n\n};\n\n/**\n * Abstract base class of interpolants over parametric samples.\n *\n * The parameter domain is one dimensional, typically the time or a path\n * along a curve defined by the data.\n *\n * The sample values can have any dimensionality and derived classes may\n * apply special interpretations to the data.\n *\n * This class provides the interval seek in a Template Method, deferring\n * the actual interpolation to derived classes.\n *\n * Time complexity is O(1) for linear access crossing at most two points\n * and O(log N) for random access, where N is the number of positions.\n *\n * References:\n *\n * \t\thttp://www.oodesign.com/template-method-pattern.html\n *\n * @author tschw\n */\n\nfunction Interpolant( parameterPositions, sampleValues, sampleSize, resultBuffer ) {\n\n\tthis.parameterPositions = parameterPositions;\n\tthis._cachedIndex = 0;\n\n\tthis.resultBuffer = resultBuffer !== undefined ?\n\t\tresultBuffer : new sampleValues.constructor( sampleSize );\n\tthis.sampleValues = sampleValues;\n\tthis.valueSize = sampleSize;\n\n}\n\nObject.assign( Interpolant.prototype, {\n\n\tevaluate: function ( t ) {\n\n\t\tvar pp = this.parameterPositions,\n\t\t\ti1 = this._cachedIndex,\n\n\t\t\tt1 = pp[ i1 ],\n\t\t\tt0 = pp[ i1 - 1 ];\n\n\t\tvalidate_interval: {\n\n\t\t\tseek: {\n\n\t\t\t\tvar right;\n\n\t\t\t\tlinear_scan: {\n\n\t\t\t\t\t//- See http://jsperf.com/comparison-to-undefined/3\n\t\t\t\t\t//- slower code:\n\t\t\t\t\t//-\n\t\t\t\t\t//- \t\t\t\tif ( t >= t1 || t1 === undefined ) {\n\t\t\t\t\tforward_scan: if ( ! ( t < t1 ) ) {\n\n\t\t\t\t\t\tfor ( var giveUpAt = i1 + 2; ; ) {\n\n\t\t\t\t\t\t\tif ( t1 === undefined ) {\n\n\t\t\t\t\t\t\t\tif ( t < t0 ) break forward_scan;\n\n\t\t\t\t\t\t\t\t// after end\n\n\t\t\t\t\t\t\t\ti1 = pp.length;\n\t\t\t\t\t\t\t\tthis._cachedIndex = i1;\n\t\t\t\t\t\t\t\treturn this.afterEnd_( i1 - 1, t, t0 );\n\n\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t\tif ( i1 === giveUpAt ) break; // this loop\n\n\t\t\t\t\t\t\tt0 = t1;\n\t\t\t\t\t\t\tt1 = pp[ ++ i1 ];\n\n\t\t\t\t\t\t\tif ( t < t1 ) {\n\n\t\t\t\t\t\t\t\t// we have arrived at the sought interval\n\t\t\t\t\t\t\t\tbreak seek;\n\n\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\t// prepare binary search on the right side of the index\n\t\t\t\t\t\tright = pp.length;\n\t\t\t\t\t\tbreak linear_scan;\n\n\t\t\t\t\t}\n\n\t\t\t\t\t//- slower code:\n\t\t\t\t\t//-\t\t\t\t\tif ( t < t0 || t0 === undefined ) {\n\t\t\t\t\tif ( ! ( t >= t0 ) ) {\n\n\t\t\t\t\t\t// looping?\n\n\t\t\t\t\t\tvar t1global = pp[ 1 ];\n\n\t\t\t\t\t\tif ( t < t1global ) {\n\n\t\t\t\t\t\t\ti1 = 2; // + 1, using the scan for the details\n\t\t\t\t\t\t\tt0 = t1global;\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\t// linear reverse scan\n\n\t\t\t\t\t\tfor ( var giveUpAt = i1 - 2; ; ) {\n\n\t\t\t\t\t\t\tif ( t0 === undefined ) {\n\n\t\t\t\t\t\t\t\t// before start\n\n\t\t\t\t\t\t\t\tthis._cachedIndex = 0;\n\t\t\t\t\t\t\t\treturn this.beforeStart_( 0, t, t1 );\n\n\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t\tif ( i1 === giveUpAt ) break; // this loop\n\n\t\t\t\t\t\t\tt1 = t0;\n\t\t\t\t\t\t\tt0 = pp[ -- i1 - 1 ];\n\n\t\t\t\t\t\t\tif ( t >= t0 ) {\n\n\t\t\t\t\t\t\t\t// we have arrived at the sought interval\n\t\t\t\t\t\t\t\tbreak seek;\n\n\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\t// prepare binary search on the left side of the index\n\t\t\t\t\t\tright = i1;\n\t\t\t\t\t\ti1 = 0;\n\t\t\t\t\t\tbreak linear_scan;\n\n\t\t\t\t\t}\n\n\t\t\t\t\t// the interval is valid\n\n\t\t\t\t\tbreak validate_interval;\n\n\t\t\t\t} // linear scan\n\n\t\t\t\t// binary search\n\n\t\t\t\twhile ( i1 < right ) {\n\n\t\t\t\t\tvar mid = ( i1 + right ) >>> 1;\n\n\t\t\t\t\tif ( t < pp[ mid ] ) {\n\n\t\t\t\t\t\tright = mid;\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\ti1 = mid + 1;\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\tt1 = pp[ i1 ];\n\t\t\t\tt0 = pp[ i1 - 1 ];\n\n\t\t\t\t// check boundary cases, again\n\n\t\t\t\tif ( t0 === undefined ) {\n\n\t\t\t\t\tthis._cachedIndex = 0;\n\t\t\t\t\treturn this.beforeStart_( 0, t, t1 );\n\n\t\t\t\t}\n\n\t\t\t\tif ( t1 === undefined ) {\n\n\t\t\t\t\ti1 = pp.length;\n\t\t\t\t\tthis._cachedIndex = i1;\n\t\t\t\t\treturn this.afterEnd_( i1 - 1, t0, t );\n\n\t\t\t\t}\n\n\t\t\t} // seek\n\n\t\t\tthis._cachedIndex = i1;\n\n\t\t\tthis.intervalChanged_( i1, t0, t1 );\n\n\t\t} // validate_interval\n\n\t\treturn this.interpolate_( i1, t0, t, t1 );\n\n\t},\n\n\tsettings: null, // optional, subclass-specific settings structure\n\t// Note: The indirection allows central control of many interpolants.\n\n\t// --- Protected interface\n\n\tDefaultSettings_: {},\n\n\tgetSettings_: function () {\n\n\t\treturn this.settings || this.DefaultSettings_;\n\n\t},\n\n\tcopySampleValue_: function ( index ) {\n\n\t\t// copies a sample value to the result buffer\n\n\t\tvar result = this.resultBuffer,\n\t\t\tvalues = this.sampleValues,\n\t\t\tstride = this.valueSize,\n\t\t\toffset = index * stride;\n\n\t\tfor ( var i = 0; i !== stride; ++ i ) {\n\n\t\t\tresult[ i ] = values[ offset + i ];\n\n\t\t}\n\n\t\treturn result;\n\n\t},\n\n\t// Template methods for derived classes:\n\n\tinterpolate_: function ( /* i1, t0, t, t1 */ ) {\n\n\t\tthrow new Error( 'call to abstract method' );\n\t\t// implementations shall return this.resultBuffer\n\n\t},\n\n\tintervalChanged_: function ( /* i1, t0, t1 */ ) {\n\n\t\t// empty\n\n\t}\n\n} );\n\n//!\\ DECLARE ALIAS AFTER assign prototype !\nObject.assign( Interpolant.prototype, {\n\n\t//( 0, t, t0 ), returns this.resultBuffer\n\tbeforeStart_: Interpolant.prototype.copySampleValue_,\n\n\t//( N-1, tN-1, t ), returns this.resultBuffer\n\tafterEnd_: Interpolant.prototype.copySampleValue_,\n\n} );\n\n/**\n * Fast and simple cubic spline interpolant.\n *\n * It was derived from a Hermitian construction setting the first derivative\n * at each sample position to the linear slope between neighboring positions\n * over their parameter interval.\n *\n * @author tschw\n */\n\nfunction CubicInterpolant( parameterPositions, sampleValues, sampleSize, resultBuffer ) {\n\n\tInterpolant.call( this, parameterPositions, sampleValues, sampleSize, resultBuffer );\n\n\tthis._weightPrev = - 0;\n\tthis._offsetPrev = - 0;\n\tthis._weightNext = - 0;\n\tthis._offsetNext = - 0;\n\n}\n\nCubicInterpolant.prototype = Object.assign( Object.create( Interpolant.prototype ), {\n\n\tconstructor: CubicInterpolant,\n\n\tDefaultSettings_: {\n\n\t\tendingStart: ZeroCurvatureEnding,\n\t\tendingEnd: ZeroCurvatureEnding\n\n\t},\n\n\tintervalChanged_: function ( i1, t0, t1 ) {\n\n\t\tvar pp = this.parameterPositions,\n\t\t\tiPrev = i1 - 2,\n\t\t\tiNext = i1 + 1,\n\n\t\t\ttPrev = pp[ iPrev ],\n\t\t\ttNext = pp[ iNext ];\n\n\t\tif ( tPrev === undefined ) {\n\n\t\t\tswitch ( this.getSettings_().endingStart ) {\n\n\t\t\t\tcase ZeroSlopeEnding:\n\n\t\t\t\t\t// f'(t0) = 0\n\t\t\t\t\tiPrev = i1;\n\t\t\t\t\ttPrev = 2 * t0 - t1;\n\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase WrapAroundEnding:\n\n\t\t\t\t\t// use the other end of the curve\n\t\t\t\t\tiPrev = pp.length - 2;\n\t\t\t\t\ttPrev = t0 + pp[ iPrev ] - pp[ iPrev + 1 ];\n\n\t\t\t\t\tbreak;\n\n\t\t\t\tdefault: // ZeroCurvatureEnding\n\n\t\t\t\t\t// f''(t0) = 0 a.k.a. Natural Spline\n\t\t\t\t\tiPrev = i1;\n\t\t\t\t\ttPrev = t1;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( tNext === undefined ) {\n\n\t\t\tswitch ( this.getSettings_().endingEnd ) {\n\n\t\t\t\tcase ZeroSlopeEnding:\n\n\t\t\t\t\t// f'(tN) = 0\n\t\t\t\t\tiNext = i1;\n\t\t\t\t\ttNext = 2 * t1 - t0;\n\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase WrapAroundEnding:\n\n\t\t\t\t\t// use the other end of the curve\n\t\t\t\t\tiNext = 1;\n\t\t\t\t\ttNext = t1 + pp[ 1 ] - pp[ 0 ];\n\n\t\t\t\t\tbreak;\n\n\t\t\t\tdefault: // ZeroCurvatureEnding\n\n\t\t\t\t\t// f''(tN) = 0, a.k.a. Natural Spline\n\t\t\t\t\tiNext = i1 - 1;\n\t\t\t\t\ttNext = t0;\n\n\t\t\t}\n\n\t\t}\n\n\t\tvar halfDt = ( t1 - t0 ) * 0.5,\n\t\t\tstride = this.valueSize;\n\n\t\tthis._weightPrev = halfDt / ( t0 - tPrev );\n\t\tthis._weightNext = halfDt / ( tNext - t1 );\n\t\tthis._offsetPrev = iPrev * stride;\n\t\tthis._offsetNext = iNext * stride;\n\n\t},\n\n\tinterpolate_: function ( i1, t0, t, t1 ) {\n\n\t\tvar result = this.resultBuffer,\n\t\t\tvalues = this.sampleValues,\n\t\t\tstride = this.valueSize,\n\n\t\t\to1 = i1 * stride,\t\to0 = o1 - stride,\n\t\t\toP = this._offsetPrev, \toN = this._offsetNext,\n\t\t\twP = this._weightPrev,\twN = this._weightNext,\n\n\t\t\tp = ( t - t0 ) / ( t1 - t0 ),\n\t\t\tpp = p * p,\n\t\t\tppp = pp * p;\n\n\t\t// evaluate polynomials\n\n\t\tvar sP = - wP * ppp + 2 * wP * pp - wP * p;\n\t\tvar s0 = ( 1 + wP ) * ppp + ( - 1.5 - 2 * wP ) * pp + ( - 0.5 + wP ) * p + 1;\n\t\tvar s1 = ( - 1 - wN ) * ppp + ( 1.5 + wN ) * pp + 0.5 * p;\n\t\tvar sN = wN * ppp - wN * pp;\n\n\t\t// combine data linearly\n\n\t\tfor ( var i = 0; i !== stride; ++ i ) {\n\n\t\t\tresult[ i ] =\n\t\t\t\t\tsP * values[ oP + i ] +\n\t\t\t\t\ts0 * values[ o0 + i ] +\n\t\t\t\t\ts1 * values[ o1 + i ] +\n\t\t\t\t\tsN * values[ oN + i ];\n\n\t\t}\n\n\t\treturn result;\n\n\t}\n\n} );\n\n/**\n * @author tschw\n */\n\nfunction LinearInterpolant( parameterPositions, sampleValues, sampleSize, resultBuffer ) {\n\n\tInterpolant.call( this, parameterPositions, sampleValues, sampleSize, resultBuffer );\n\n}\n\nLinearInterpolant.prototype = Object.assign( Object.create( Interpolant.prototype ), {\n\n\tconstructor: LinearInterpolant,\n\n\tinterpolate_: function ( i1, t0, t, t1 ) {\n\n\t\tvar result = this.resultBuffer,\n\t\t\tvalues = this.sampleValues,\n\t\t\tstride = this.valueSize,\n\n\t\t\toffset1 = i1 * stride,\n\t\t\toffset0 = offset1 - stride,\n\n\t\t\tweight1 = ( t - t0 ) / ( t1 - t0 ),\n\t\t\tweight0 = 1 - weight1;\n\n\t\tfor ( var i = 0; i !== stride; ++ i ) {\n\n\t\t\tresult[ i ] =\n\t\t\t\t\tvalues[ offset0 + i ] * weight0 +\n\t\t\t\t\tvalues[ offset1 + i ] * weight1;\n\n\t\t}\n\n\t\treturn result;\n\n\t}\n\n} );\n\n/**\n *\n * Interpolant that evaluates to the sample value at the position preceeding\n * the parameter.\n *\n * @author tschw\n */\n\nfunction DiscreteInterpolant( parameterPositions, sampleValues, sampleSize, resultBuffer ) {\n\n\tInterpolant.call( this, parameterPositions, sampleValues, sampleSize, resultBuffer );\n\n}\n\nDiscreteInterpolant.prototype = Object.assign( Object.create( Interpolant.prototype ), {\n\n\tconstructor: DiscreteInterpolant,\n\n\tinterpolate_: function ( i1 /*, t0, t, t1 */ ) {\n\n\t\treturn this.copySampleValue_( i1 - 1 );\n\n\t}\n\n} );\n\n/**\n *\n * A timed sequence of keyframes for a specific property.\n *\n *\n * @author Ben Houston / http://clara.io/\n * @author David Sarno / http://lighthaus.us/\n * @author tschw\n */\n\nfunction KeyframeTrack( name, times, values, interpolation ) {\n\n\tif ( name === undefined ) throw new Error( 'THREE.KeyframeTrack: track name is undefined' );\n\tif ( times === undefined || times.length === 0 ) throw new Error( 'THREE.KeyframeTrack: no keyframes in track named ' + name );\n\n\tthis.name = name;\n\n\tthis.times = AnimationUtils.convertArray( times, this.TimeBufferType );\n\tthis.values = AnimationUtils.convertArray( values, this.ValueBufferType );\n\n\tthis.setInterpolation( interpolation || this.DefaultInterpolation );\n\n}\n\n// Static methods\n\nObject.assign( KeyframeTrack, {\n\n\t// Serialization (in static context, because of constructor invocation\n\t// and automatic invocation of .toJSON):\n\n\ttoJSON: function ( track ) {\n\n\t\tvar trackType = track.constructor;\n\n\t\tvar json;\n\n\t\t// derived classes can define a static toJSON method\n\t\tif ( trackType.toJSON !== undefined ) {\n\n\t\t\tjson = trackType.toJSON( track );\n\n\t\t} else {\n\n\t\t\t// by default, we assume the data can be serialized as-is\n\t\t\tjson = {\n\n\t\t\t\t'name': track.name,\n\t\t\t\t'times': AnimationUtils.convertArray( track.times, Array ),\n\t\t\t\t'values': AnimationUtils.convertArray( track.values, Array )\n\n\t\t\t};\n\n\t\t\tvar interpolation = track.getInterpolation();\n\n\t\t\tif ( interpolation !== track.DefaultInterpolation ) {\n\n\t\t\t\tjson.interpolation = interpolation;\n\n\t\t\t}\n\n\t\t}\n\n\t\tjson.type = track.ValueTypeName; // mandatory\n\n\t\treturn json;\n\n\t}\n\n} );\n\nObject.assign( KeyframeTrack.prototype, {\n\n\tconstructor: KeyframeTrack,\n\n\tTimeBufferType: Float32Array,\n\n\tValueBufferType: Float32Array,\n\n\tDefaultInterpolation: InterpolateLinear,\n\n\tInterpolantFactoryMethodDiscrete: function ( result ) {\n\n\t\treturn new DiscreteInterpolant( this.times, this.values, this.getValueSize(), result );\n\n\t},\n\n\tInterpolantFactoryMethodLinear: function ( result ) {\n\n\t\treturn new LinearInterpolant( this.times, this.values, this.getValueSize(), result );\n\n\t},\n\n\tInterpolantFactoryMethodSmooth: function ( result ) {\n\n\t\treturn new CubicInterpolant( this.times, this.values, this.getValueSize(), result );\n\n\t},\n\n\tsetInterpolation: function ( interpolation ) {\n\n\t\tvar factoryMethod;\n\n\t\tswitch ( interpolation ) {\n\n\t\t\tcase InterpolateDiscrete:\n\n\t\t\t\tfactoryMethod = this.InterpolantFactoryMethodDiscrete;\n\n\t\t\t\tbreak;\n\n\t\t\tcase InterpolateLinear:\n\n\t\t\t\tfactoryMethod = this.InterpolantFactoryMethodLinear;\n\n\t\t\t\tbreak;\n\n\t\t\tcase InterpolateSmooth:\n\n\t\t\t\tfactoryMethod = this.InterpolantFactoryMethodSmooth;\n\n\t\t\t\tbreak;\n\n\t\t}\n\n\t\tif ( factoryMethod === undefined ) {\n\n\t\t\tvar message = \"unsupported interpolation for \" +\n\t\t\t\tthis.ValueTypeName + \" keyframe track named \" + this.name;\n\n\t\t\tif ( this.createInterpolant === undefined ) {\n\n\t\t\t\t// fall back to default, unless the default itself is messed up\n\t\t\t\tif ( interpolation !== this.DefaultInterpolation ) {\n\n\t\t\t\t\tthis.setInterpolation( this.DefaultInterpolation );\n\n\t\t\t\t} else {\n\n\t\t\t\t\tthrow new Error( message ); // fatal, in this case\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tconsole.warn( 'THREE.KeyframeTrack:', message );\n\t\t\treturn this;\n\n\t\t}\n\n\t\tthis.createInterpolant = factoryMethod;\n\n\t\treturn this;\n\n\t},\n\n\tgetInterpolation: function () {\n\n\t\tswitch ( this.createInterpolant ) {\n\n\t\t\tcase this.InterpolantFactoryMethodDiscrete:\n\n\t\t\t\treturn InterpolateDiscrete;\n\n\t\t\tcase this.InterpolantFactoryMethodLinear:\n\n\t\t\t\treturn InterpolateLinear;\n\n\t\t\tcase this.InterpolantFactoryMethodSmooth:\n\n\t\t\t\treturn InterpolateSmooth;\n\n\t\t}\n\n\t},\n\n\tgetValueSize: function () {\n\n\t\treturn this.values.length / this.times.length;\n\n\t},\n\n\t// move all keyframes either forwards or backwards in time\n\tshift: function ( timeOffset ) {\n\n\t\tif ( timeOffset !== 0.0 ) {\n\n\t\t\tvar times = this.times;\n\n\t\t\tfor ( var i = 0, n = times.length; i !== n; ++ i ) {\n\n\t\t\t\ttimes[ i ] += timeOffset;\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\t// scale all keyframe times by a factor (useful for frame <-> seconds conversions)\n\tscale: function ( timeScale ) {\n\n\t\tif ( timeScale !== 1.0 ) {\n\n\t\t\tvar times = this.times;\n\n\t\t\tfor ( var i = 0, n = times.length; i !== n; ++ i ) {\n\n\t\t\t\ttimes[ i ] *= timeScale;\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\t// removes keyframes before and after animation without changing any values within the range [startTime, endTime].\n\t// IMPORTANT: We do not shift around keys to the start of the track time, because for interpolated keys this will change their values\n\ttrim: function ( startTime, endTime ) {\n\n\t\tvar times = this.times,\n\t\t\tnKeys = times.length,\n\t\t\tfrom = 0,\n\t\t\tto = nKeys - 1;\n\n\t\twhile ( from !== nKeys && times[ from ] < startTime ) {\n\n\t\t\t++ from;\n\n\t\t}\n\n\t\twhile ( to !== - 1 && times[ to ] > endTime ) {\n\n\t\t\t-- to;\n\n\t\t}\n\n\t\t++ to; // inclusive -> exclusive bound\n\n\t\tif ( from !== 0 || to !== nKeys ) {\n\n\t\t\t// empty tracks are forbidden, so keep at least one keyframe\n\t\t\tif ( from >= to ) {\n\n\t\t\t\tto = Math.max( to, 1 );\n\t\t\t\tfrom = to - 1;\n\n\t\t\t}\n\n\t\t\tvar stride = this.getValueSize();\n\t\t\tthis.times = AnimationUtils.arraySlice( times, from, to );\n\t\t\tthis.values = AnimationUtils.arraySlice( this.values, from * stride, to * stride );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\t// ensure we do not get a GarbageInGarbageOut situation, make sure tracks are at least minimally viable\n\tvalidate: function () {\n\n\t\tvar valid = true;\n\n\t\tvar valueSize = this.getValueSize();\n\t\tif ( valueSize - Math.floor( valueSize ) !== 0 ) {\n\n\t\t\tconsole.error( 'THREE.KeyframeTrack: Invalid value size in track.', this );\n\t\t\tvalid = false;\n\n\t\t}\n\n\t\tvar times = this.times,\n\t\t\tvalues = this.values,\n\n\t\t\tnKeys = times.length;\n\n\t\tif ( nKeys === 0 ) {\n\n\t\t\tconsole.error( 'THREE.KeyframeTrack: Track is empty.', this );\n\t\t\tvalid = false;\n\n\t\t}\n\n\t\tvar prevTime = null;\n\n\t\tfor ( var i = 0; i !== nKeys; i ++ ) {\n\n\t\t\tvar currTime = times[ i ];\n\n\t\t\tif ( typeof currTime === 'number' && isNaN( currTime ) ) {\n\n\t\t\t\tconsole.error( 'THREE.KeyframeTrack: Time is not a valid number.', this, i, currTime );\n\t\t\t\tvalid = false;\n\t\t\t\tbreak;\n\n\t\t\t}\n\n\t\t\tif ( prevTime !== null && prevTime > currTime ) {\n\n\t\t\t\tconsole.error( 'THREE.KeyframeTrack: Out of order keys.', this, i, currTime, prevTime );\n\t\t\t\tvalid = false;\n\t\t\t\tbreak;\n\n\t\t\t}\n\n\t\t\tprevTime = currTime;\n\n\t\t}\n\n\t\tif ( values !== undefined ) {\n\n\t\t\tif ( AnimationUtils.isTypedArray( values ) ) {\n\n\t\t\t\tfor ( var i = 0, n = values.length; i !== n; ++ i ) {\n\n\t\t\t\t\tvar value = values[ i ];\n\n\t\t\t\t\tif ( isNaN( value ) ) {\n\n\t\t\t\t\t\tconsole.error( 'THREE.KeyframeTrack: Value is not a valid number.', this, i, value );\n\t\t\t\t\t\tvalid = false;\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn valid;\n\n\t},\n\n\t// removes equivalent sequential keys as common in morph target sequences\n\t// (0,0,0,0,1,1,1,0,0,0,0,0,0,0) --> (0,0,1,1,0,0)\n\toptimize: function () {\n\n\t\t// times or values may be shared with other tracks, so overwriting is unsafe\n\t\tvar times = AnimationUtils.arraySlice( this.times ),\n\t\t\tvalues = AnimationUtils.arraySlice( this.values ),\n\t\t\tstride = this.getValueSize(),\n\n\t\t\tsmoothInterpolation = this.getInterpolation() === InterpolateSmooth,\n\n\t\t\twriteIndex = 1,\n\t\t\tlastIndex = times.length - 1;\n\n\t\tfor ( var i = 1; i < lastIndex; ++ i ) {\n\n\t\t\tvar keep = false;\n\n\t\t\tvar time = times[ i ];\n\t\t\tvar timeNext = times[ i + 1 ];\n\n\t\t\t// remove adjacent keyframes scheduled at the same time\n\n\t\t\tif ( time !== timeNext && ( i !== 1 || time !== time[ 0 ] ) ) {\n\n\t\t\t\tif ( ! smoothInterpolation ) {\n\n\t\t\t\t\t// remove unnecessary keyframes same as their neighbors\n\n\t\t\t\t\tvar offset = i * stride,\n\t\t\t\t\t\toffsetP = offset - stride,\n\t\t\t\t\t\toffsetN = offset + stride;\n\n\t\t\t\t\tfor ( var j = 0; j !== stride; ++ j ) {\n\n\t\t\t\t\t\tvar value = values[ offset + j ];\n\n\t\t\t\t\t\tif ( value !== values[ offsetP + j ] ||\n\t\t\t\t\t\t\tvalue !== values[ offsetN + j ] ) {\n\n\t\t\t\t\t\t\tkeep = true;\n\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t} else {\n\n\t\t\t\t\tkeep = true;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\t// in-place compaction\n\n\t\t\tif ( keep ) {\n\n\t\t\t\tif ( i !== writeIndex ) {\n\n\t\t\t\t\ttimes[ writeIndex ] = times[ i ];\n\n\t\t\t\t\tvar readOffset = i * stride,\n\t\t\t\t\t\twriteOffset = writeIndex * stride;\n\n\t\t\t\t\tfor ( var j = 0; j !== stride; ++ j ) {\n\n\t\t\t\t\t\tvalues[ writeOffset + j ] = values[ readOffset + j ];\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\t++ writeIndex;\n\n\t\t\t}\n\n\t\t}\n\n\t\t// flush last keyframe (compaction looks ahead)\n\n\t\tif ( lastIndex > 0 ) {\n\n\t\t\ttimes[ writeIndex ] = times[ lastIndex ];\n\n\t\t\tfor ( var readOffset = lastIndex * stride, writeOffset = writeIndex * stride, j = 0; j !== stride; ++ j ) {\n\n\t\t\t\tvalues[ writeOffset + j ] = values[ readOffset + j ];\n\n\t\t\t}\n\n\t\t\t++ writeIndex;\n\n\t\t}\n\n\t\tif ( writeIndex !== times.length ) {\n\n\t\t\tthis.times = AnimationUtils.arraySlice( times, 0, writeIndex );\n\t\t\tthis.values = AnimationUtils.arraySlice( values, 0, writeIndex * stride );\n\n\t\t} else {\n\n\t\t\tthis.times = times;\n\t\t\tthis.values = values;\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tclone: function () {\n\n\t\tvar times = AnimationUtils.arraySlice( this.times, 0 );\n\t\tvar values = AnimationUtils.arraySlice( this.values, 0 );\n\n\t\tvar TypedKeyframeTrack = this.constructor;\n\t\tvar track = new TypedKeyframeTrack( this.name, times, values );\n\n\t\t// Interpolant argument to constructor is not saved, so copy the factory method directly.\n\t\ttrack.createInterpolant = this.createInterpolant;\n\n\t\treturn track;\n\n\t}\n\n} );\n\n/**\n *\n * A Track of Boolean keyframe values.\n *\n *\n * @author Ben Houston / http://clara.io/\n * @author David Sarno / http://lighthaus.us/\n * @author tschw\n */\n\nfunction BooleanKeyframeTrack( name, times, values ) {\n\n\tKeyframeTrack.call( this, name, times, values );\n\n}\n\nBooleanKeyframeTrack.prototype = Object.assign( Object.create( KeyframeTrack.prototype ), {\n\n\tconstructor: BooleanKeyframeTrack,\n\n\tValueTypeName: 'bool',\n\tValueBufferType: Array,\n\n\tDefaultInterpolation: InterpolateDiscrete,\n\n\tInterpolantFactoryMethodLinear: undefined,\n\tInterpolantFactoryMethodSmooth: undefined\n\n\t// Note: Actually this track could have a optimized / compressed\n\t// representation of a single value and a custom interpolant that\n\t// computes \"firstValue ^ isOdd( index )\".\n\n} );\n\n/**\n *\n * A Track of keyframe values that represent color.\n *\n *\n * @author Ben Houston / http://clara.io/\n * @author David Sarno / http://lighthaus.us/\n * @author tschw\n */\n\nfunction ColorKeyframeTrack( name, times, values, interpolation ) {\n\n\tKeyframeTrack.call( this, name, times, values, interpolation );\n\n}\n\nColorKeyframeTrack.prototype = Object.assign( Object.create( KeyframeTrack.prototype ), {\n\n\tconstructor: ColorKeyframeTrack,\n\n\tValueTypeName: 'color'\n\n\t// ValueBufferType is inherited\n\n\t// DefaultInterpolation is inherited\n\n\t// Note: Very basic implementation and nothing special yet.\n\t// However, this is the place for color space parameterization.\n\n} );\n\n/**\n *\n * A Track of numeric keyframe values.\n *\n * @author Ben Houston / http://clara.io/\n * @author David Sarno / http://lighthaus.us/\n * @author tschw\n */\n\nfunction NumberKeyframeTrack( name, times, values, interpolation ) {\n\n\tKeyframeTrack.call( this, name, times, values, interpolation );\n\n}\n\nNumberKeyframeTrack.prototype = Object.assign( Object.create( KeyframeTrack.prototype ), {\n\n\tconstructor: NumberKeyframeTrack,\n\n\tValueTypeName: 'number'\n\n\t// ValueBufferType is inherited\n\n\t// DefaultInterpolation is inherited\n\n} );\n\n/**\n * Spherical linear unit quaternion interpolant.\n *\n * @author tschw\n */\n\nfunction QuaternionLinearInterpolant( parameterPositions, sampleValues, sampleSize, resultBuffer ) {\n\n\tInterpolant.call( this, parameterPositions, sampleValues, sampleSize, resultBuffer );\n\n}\n\nQuaternionLinearInterpolant.prototype = Object.assign( Object.create( Interpolant.prototype ), {\n\n\tconstructor: QuaternionLinearInterpolant,\n\n\tinterpolate_: function ( i1, t0, t, t1 ) {\n\n\t\tvar result = this.resultBuffer,\n\t\t\tvalues = this.sampleValues,\n\t\t\tstride = this.valueSize,\n\n\t\t\toffset = i1 * stride,\n\n\t\t\talpha = ( t - t0 ) / ( t1 - t0 );\n\n\t\tfor ( var end = offset + stride; offset !== end; offset += 4 ) {\n\n\t\t\tQuaternion.slerpFlat( result, 0, values, offset - stride, values, offset, alpha );\n\n\t\t}\n\n\t\treturn result;\n\n\t}\n\n} );\n\n/**\n *\n * A Track of quaternion keyframe values.\n *\n * @author Ben Houston / http://clara.io/\n * @author David Sarno / http://lighthaus.us/\n * @author tschw\n */\n\nfunction QuaternionKeyframeTrack( name, times, values, interpolation ) {\n\n\tKeyframeTrack.call( this, name, times, values, interpolation );\n\n}\n\nQuaternionKeyframeTrack.prototype = Object.assign( Object.create( KeyframeTrack.prototype ), {\n\n\tconstructor: QuaternionKeyframeTrack,\n\n\tValueTypeName: 'quaternion',\n\n\t// ValueBufferType is inherited\n\n\tDefaultInterpolation: InterpolateLinear,\n\n\tInterpolantFactoryMethodLinear: function ( result ) {\n\n\t\treturn new QuaternionLinearInterpolant( this.times, this.values, this.getValueSize(), result );\n\n\t},\n\n\tInterpolantFactoryMethodSmooth: undefined // not yet implemented\n\n} );\n\n/**\n *\n * A Track that interpolates Strings\n *\n *\n * @author Ben Houston / http://clara.io/\n * @author David Sarno / http://lighthaus.us/\n * @author tschw\n */\n\nfunction StringKeyframeTrack( name, times, values, interpolation ) {\n\n\tKeyframeTrack.call( this, name, times, values, interpolation );\n\n}\n\nStringKeyframeTrack.prototype = Object.assign( Object.create( KeyframeTrack.prototype ), {\n\n\tconstructor: StringKeyframeTrack,\n\n\tValueTypeName: 'string',\n\tValueBufferType: Array,\n\n\tDefaultInterpolation: InterpolateDiscrete,\n\n\tInterpolantFactoryMethodLinear: undefined,\n\n\tInterpolantFactoryMethodSmooth: undefined\n\n} );\n\n/**\n *\n * A Track of vectored keyframe values.\n *\n *\n * @author Ben Houston / http://clara.io/\n * @author David Sarno / http://lighthaus.us/\n * @author tschw\n */\n\nfunction VectorKeyframeTrack( name, times, values, interpolation ) {\n\n\tKeyframeTrack.call( this, name, times, values, interpolation );\n\n}\n\nVectorKeyframeTrack.prototype = Object.assign( Object.create( KeyframeTrack.prototype ), {\n\n\tconstructor: VectorKeyframeTrack,\n\n\tValueTypeName: 'vector'\n\n\t// ValueBufferType is inherited\n\n\t// DefaultInterpolation is inherited\n\n} );\n\n/**\n *\n * Reusable set of Tracks that represent an animation.\n *\n * @author Ben Houston / http://clara.io/\n * @author David Sarno / http://lighthaus.us/\n */\n\nfunction AnimationClip( name, duration, tracks ) {\n\n\tthis.name = name;\n\tthis.tracks = tracks;\n\tthis.duration = ( duration !== undefined ) ? duration : - 1;\n\n\tthis.uuid = MathUtils.generateUUID();\n\n\t// this means it should figure out its duration by scanning the tracks\n\tif ( this.duration < 0 ) {\n\n\t\tthis.resetDuration();\n\n\t}\n\n}\n\nfunction getTrackTypeForValueTypeName( typeName ) {\n\n\tswitch ( typeName.toLowerCase() ) {\n\n\t\tcase 'scalar':\n\t\tcase 'double':\n\t\tcase 'float':\n\t\tcase 'number':\n\t\tcase 'integer':\n\n\t\t\treturn NumberKeyframeTrack;\n\n\t\tcase 'vector':\n\t\tcase 'vector2':\n\t\tcase 'vector3':\n\t\tcase 'vector4':\n\n\t\t\treturn VectorKeyframeTrack;\n\n\t\tcase 'color':\n\n\t\t\treturn ColorKeyframeTrack;\n\n\t\tcase 'quaternion':\n\n\t\t\treturn QuaternionKeyframeTrack;\n\n\t\tcase 'bool':\n\t\tcase 'boolean':\n\n\t\t\treturn BooleanKeyframeTrack;\n\n\t\tcase 'string':\n\n\t\t\treturn StringKeyframeTrack;\n\n\t}\n\n\tthrow new Error( 'THREE.KeyframeTrack: Unsupported typeName: ' + typeName );\n\n}\n\nfunction parseKeyframeTrack( json ) {\n\n\tif ( json.type === undefined ) {\n\n\t\tthrow new Error( 'THREE.KeyframeTrack: track type undefined, can not parse' );\n\n\t}\n\n\tvar trackType = getTrackTypeForValueTypeName( json.type );\n\n\tif ( json.times === undefined ) {\n\n\t\tvar times = [], values = [];\n\n\t\tAnimationUtils.flattenJSON( json.keys, times, values, 'value' );\n\n\t\tjson.times = times;\n\t\tjson.values = values;\n\n\t}\n\n\t// derived classes can define a static parse method\n\tif ( trackType.parse !== undefined ) {\n\n\t\treturn trackType.parse( json );\n\n\t} else {\n\n\t\t// by default, we assume a constructor compatible with the base\n\t\treturn new trackType( json.name, json.times, json.values, json.interpolation );\n\n\t}\n\n}\n\nObject.assign( AnimationClip, {\n\n\tparse: function ( json ) {\n\n\t\tvar tracks = [],\n\t\t\tjsonTracks = json.tracks,\n\t\t\tframeTime = 1.0 / ( json.fps || 1.0 );\n\n\t\tfor ( var i = 0, n = jsonTracks.length; i !== n; ++ i ) {\n\n\t\t\ttracks.push( parseKeyframeTrack( jsonTracks[ i ] ).scale( frameTime ) );\n\n\t\t}\n\n\t\treturn new AnimationClip( json.name, json.duration, tracks );\n\n\t},\n\n\ttoJSON: function ( clip ) {\n\n\t\tvar tracks = [],\n\t\t\tclipTracks = clip.tracks;\n\n\t\tvar json = {\n\n\t\t\t'name': clip.name,\n\t\t\t'duration': clip.duration,\n\t\t\t'tracks': tracks,\n\t\t\t'uuid': clip.uuid\n\n\t\t};\n\n\t\tfor ( var i = 0, n = clipTracks.length; i !== n; ++ i ) {\n\n\t\t\ttracks.push( KeyframeTrack.toJSON( clipTracks[ i ] ) );\n\n\t\t}\n\n\t\treturn json;\n\n\t},\n\n\tCreateFromMorphTargetSequence: function ( name, morphTargetSequence, fps, noLoop ) {\n\n\t\tvar numMorphTargets = morphTargetSequence.length;\n\t\tvar tracks = [];\n\n\t\tfor ( var i = 0; i < numMorphTargets; i ++ ) {\n\n\t\t\tvar times = [];\n\t\t\tvar values = [];\n\n\t\t\ttimes.push(\n\t\t\t\t( i + numMorphTargets - 1 ) % numMorphTargets,\n\t\t\t\ti,\n\t\t\t\t( i + 1 ) % numMorphTargets );\n\n\t\t\tvalues.push( 0, 1, 0 );\n\n\t\t\tvar order = AnimationUtils.getKeyframeOrder( times );\n\t\t\ttimes = AnimationUtils.sortedArray( times, 1, order );\n\t\t\tvalues = AnimationUtils.sortedArray( values, 1, order );\n\n\t\t\t// if there is a key at the first frame, duplicate it as the\n\t\t\t// last frame as well for perfect loop.\n\t\t\tif ( ! noLoop && times[ 0 ] === 0 ) {\n\n\t\t\t\ttimes.push( numMorphTargets );\n\t\t\t\tvalues.push( values[ 0 ] );\n\n\t\t\t}\n\n\t\t\ttracks.push(\n\t\t\t\tnew NumberKeyframeTrack(\n\t\t\t\t\t'.morphTargetInfluences[' + morphTargetSequence[ i ].name + ']',\n\t\t\t\t\ttimes, values\n\t\t\t\t).scale( 1.0 / fps ) );\n\n\t\t}\n\n\t\treturn new AnimationClip( name, - 1, tracks );\n\n\t},\n\n\tfindByName: function ( objectOrClipArray, name ) {\n\n\t\tvar clipArray = objectOrClipArray;\n\n\t\tif ( ! Array.isArray( objectOrClipArray ) ) {\n\n\t\t\tvar o = objectOrClipArray;\n\t\t\tclipArray = o.geometry && o.geometry.animations || o.animations;\n\n\t\t}\n\n\t\tfor ( var i = 0; i < clipArray.length; i ++ ) {\n\n\t\t\tif ( clipArray[ i ].name === name ) {\n\n\t\t\t\treturn clipArray[ i ];\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn null;\n\n\t},\n\n\tCreateClipsFromMorphTargetSequences: function ( morphTargets, fps, noLoop ) {\n\n\t\tvar animationToMorphTargets = {};\n\n\t\t// tested with https://regex101.com/ on trick sequences\n\t\t// such flamingo_flyA_003, flamingo_run1_003, crdeath0059\n\t\tvar pattern = /^([\\w-]*?)([\\d]+)$/;\n\n\t\t// sort morph target names into animation groups based\n\t\t// patterns like Walk_001, Walk_002, Run_001, Run_002\n\t\tfor ( var i = 0, il = morphTargets.length; i < il; i ++ ) {\n\n\t\t\tvar morphTarget = morphTargets[ i ];\n\t\t\tvar parts = morphTarget.name.match( pattern );\n\n\t\t\tif ( parts && parts.length > 1 ) {\n\n\t\t\t\tvar name = parts[ 1 ];\n\n\t\t\t\tvar animationMorphTargets = animationToMorphTargets[ name ];\n\t\t\t\tif ( ! animationMorphTargets ) {\n\n\t\t\t\t\tanimationToMorphTargets[ name ] = animationMorphTargets = [];\n\n\t\t\t\t}\n\n\t\t\t\tanimationMorphTargets.push( morphTarget );\n\n\t\t\t}\n\n\t\t}\n\n\t\tvar clips = [];\n\n\t\tfor ( var name in animationToMorphTargets ) {\n\n\t\t\tclips.push( AnimationClip.CreateFromMorphTargetSequence( name, animationToMorphTargets[ name ], fps, noLoop ) );\n\n\t\t}\n\n\t\treturn clips;\n\n\t},\n\n\t// parse the animation.hierarchy format\n\tparseAnimation: function ( animation, bones ) {\n\n\t\tif ( ! animation ) {\n\n\t\t\tconsole.error( 'THREE.AnimationClip: No animation in JSONLoader data.' );\n\t\t\treturn null;\n\n\t\t}\n\n\t\tvar addNonemptyTrack = function ( trackType, trackName, animationKeys, propertyName, destTracks ) {\n\n\t\t\t// only return track if there are actually keys.\n\t\t\tif ( animationKeys.length !== 0 ) {\n\n\t\t\t\tvar times = [];\n\t\t\t\tvar values = [];\n\n\t\t\t\tAnimationUtils.flattenJSON( animationKeys, times, values, propertyName );\n\n\t\t\t\t// empty keys are filtered out, so check again\n\t\t\t\tif ( times.length !== 0 ) {\n\n\t\t\t\t\tdestTracks.push( new trackType( trackName, times, values ) );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t};\n\n\t\tvar tracks = [];\n\n\t\tvar clipName = animation.name || 'default';\n\t\t// automatic length determination in AnimationClip.\n\t\tvar duration = animation.length || - 1;\n\t\tvar fps = animation.fps || 30;\n\n\t\tvar hierarchyTracks = animation.hierarchy || [];\n\n\t\tfor ( var h = 0; h < hierarchyTracks.length; h ++ ) {\n\n\t\t\tvar animationKeys = hierarchyTracks[ h ].keys;\n\n\t\t\t// skip empty tracks\n\t\t\tif ( ! animationKeys || animationKeys.length === 0 ) continue;\n\n\t\t\t// process morph targets\n\t\t\tif ( animationKeys[ 0 ].morphTargets ) {\n\n\t\t\t\t// figure out all morph targets used in this track\n\t\t\t\tvar morphTargetNames = {};\n\n\t\t\t\tfor ( var k = 0; k < animationKeys.length; k ++ ) {\n\n\t\t\t\t\tif ( animationKeys[ k ].morphTargets ) {\n\n\t\t\t\t\t\tfor ( var m = 0; m < animationKeys[ k ].morphTargets.length; m ++ ) {\n\n\t\t\t\t\t\t\tmorphTargetNames[ animationKeys[ k ].morphTargets[ m ] ] = - 1;\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\t// create a track for each morph target with all zero\n\t\t\t\t// morphTargetInfluences except for the keys in which\n\t\t\t\t// the morphTarget is named.\n\t\t\t\tfor ( var morphTargetName in morphTargetNames ) {\n\n\t\t\t\t\tvar times = [];\n\t\t\t\t\tvar values = [];\n\n\t\t\t\t\tfor ( var m = 0; m !== animationKeys[ k ].morphTargets.length; ++ m ) {\n\n\t\t\t\t\t\tvar animationKey = animationKeys[ k ];\n\n\t\t\t\t\t\ttimes.push( animationKey.time );\n\t\t\t\t\t\tvalues.push( ( animationKey.morphTarget === morphTargetName ) ? 1 : 0 );\n\n\t\t\t\t\t}\n\n\t\t\t\t\ttracks.push( new NumberKeyframeTrack( '.morphTargetInfluence[' + morphTargetName + ']', times, values ) );\n\n\t\t\t\t}\n\n\t\t\t\tduration = morphTargetNames.length * ( fps || 1.0 );\n\n\t\t\t} else {\n\n\t\t\t\t// ...assume skeletal animation\n\n\t\t\t\tvar boneName = '.bones[' + bones[ h ].name + ']';\n\n\t\t\t\taddNonemptyTrack(\n\t\t\t\t\tVectorKeyframeTrack, boneName + '.position',\n\t\t\t\t\tanimationKeys, 'pos', tracks );\n\n\t\t\t\taddNonemptyTrack(\n\t\t\t\t\tQuaternionKeyframeTrack, boneName + '.quaternion',\n\t\t\t\t\tanimationKeys, 'rot', tracks );\n\n\t\t\t\taddNonemptyTrack(\n\t\t\t\t\tVectorKeyframeTrack, boneName + '.scale',\n\t\t\t\t\tanimationKeys, 'scl', tracks );\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( tracks.length === 0 ) {\n\n\t\t\treturn null;\n\n\t\t}\n\n\t\tvar clip = new AnimationClip( clipName, duration, tracks );\n\n\t\treturn clip;\n\n\t}\n\n} );\n\nObject.assign( AnimationClip.prototype, {\n\n\tresetDuration: function () {\n\n\t\tvar tracks = this.tracks, duration = 0;\n\n\t\tfor ( var i = 0, n = tracks.length; i !== n; ++ i ) {\n\n\t\t\tvar track = this.tracks[ i ];\n\n\t\t\tduration = Math.max( duration, track.times[ track.times.length - 1 ] );\n\n\t\t}\n\n\t\tthis.duration = duration;\n\n\t\treturn this;\n\n\t},\n\n\ttrim: function () {\n\n\t\tfor ( var i = 0; i < this.tracks.length; i ++ ) {\n\n\t\t\tthis.tracks[ i ].trim( 0, this.duration );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tvalidate: function () {\n\n\t\tvar valid = true;\n\n\t\tfor ( var i = 0; i < this.tracks.length; i ++ ) {\n\n\t\t\tvalid = valid && this.tracks[ i ].validate();\n\n\t\t}\n\n\t\treturn valid;\n\n\t},\n\n\toptimize: function () {\n\n\t\tfor ( var i = 0; i < this.tracks.length; i ++ ) {\n\n\t\t\tthis.tracks[ i ].optimize();\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tclone: function () {\n\n\t\tvar tracks = [];\n\n\t\tfor ( var i = 0; i < this.tracks.length; i ++ ) {\n\n\t\t\ttracks.push( this.tracks[ i ].clone() );\n\n\t\t}\n\n\t\treturn new AnimationClip( this.name, this.duration, tracks );\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nvar Cache = {\n\n\tenabled: false,\n\n\tfiles: {},\n\n\tadd: function ( key, file ) {\n\n\t\tif ( this.enabled === false ) return;\n\n\t\t// console.log( 'THREE.Cache', 'Adding key:', key );\n\n\t\tthis.files[ key ] = file;\n\n\t},\n\n\tget: function ( key ) {\n\n\t\tif ( this.enabled === false ) return;\n\n\t\t// console.log( 'THREE.Cache', 'Checking key:', key );\n\n\t\treturn this.files[ key ];\n\n\t},\n\n\tremove: function ( key ) {\n\n\t\tdelete this.files[ key ];\n\n\t},\n\n\tclear: function () {\n\n\t\tthis.files = {};\n\n\t}\n\n};\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction LoadingManager( onLoad, onProgress, onError ) {\n\n\tvar scope = this;\n\n\tvar isLoading = false;\n\tvar itemsLoaded = 0;\n\tvar itemsTotal = 0;\n\tvar urlModifier = undefined;\n\tvar handlers = [];\n\n\t// Refer to #5689 for the reason why we don't set .onStart\n\t// in the constructor\n\n\tthis.onStart = undefined;\n\tthis.onLoad = onLoad;\n\tthis.onProgress = onProgress;\n\tthis.onError = onError;\n\n\tthis.itemStart = function ( url ) {\n\n\t\titemsTotal ++;\n\n\t\tif ( isLoading === false ) {\n\n\t\t\tif ( scope.onStart !== undefined ) {\n\n\t\t\t\tscope.onStart( url, itemsLoaded, itemsTotal );\n\n\t\t\t}\n\n\t\t}\n\n\t\tisLoading = true;\n\n\t};\n\n\tthis.itemEnd = function ( url ) {\n\n\t\titemsLoaded ++;\n\n\t\tif ( scope.onProgress !== undefined ) {\n\n\t\t\tscope.onProgress( url, itemsLoaded, itemsTotal );\n\n\t\t}\n\n\t\tif ( itemsLoaded === itemsTotal ) {\n\n\t\t\tisLoading = false;\n\n\t\t\tif ( scope.onLoad !== undefined ) {\n\n\t\t\t\tscope.onLoad();\n\n\t\t\t}\n\n\t\t}\n\n\t};\n\n\tthis.itemError = function ( url ) {\n\n\t\tif ( scope.onError !== undefined ) {\n\n\t\t\tscope.onError( url );\n\n\t\t}\n\n\t};\n\n\tthis.resolveURL = function ( url ) {\n\n\t\tif ( urlModifier ) {\n\n\t\t\treturn urlModifier( url );\n\n\t\t}\n\n\t\treturn url;\n\n\t};\n\n\tthis.setURLModifier = function ( transform ) {\n\n\t\turlModifier = transform;\n\n\t\treturn this;\n\n\t};\n\n\tthis.addHandler = function ( regex, loader ) {\n\n\t\thandlers.push( regex, loader );\n\n\t\treturn this;\n\n\t};\n\n\tthis.removeHandler = function ( regex ) {\n\n\t\tvar index = handlers.indexOf( regex );\n\n\t\tif ( index !== - 1 ) {\n\n\t\t\thandlers.splice( index, 2 );\n\n\t\t}\n\n\t\treturn this;\n\n\t};\n\n\tthis.getHandler = function ( file ) {\n\n\t\tfor ( var i = 0, l = handlers.length; i < l; i += 2 ) {\n\n\t\t\tvar regex = handlers[ i ];\n\t\t\tvar loader = handlers[ i + 1 ];\n\n\t\t\tif ( regex.global ) regex.lastIndex = 0; // see #17920\n\n\t\t\tif ( regex.test( file ) ) {\n\n\t\t\t\treturn loader;\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn null;\n\n\t};\n\n}\n\nvar DefaultLoadingManager = new LoadingManager();\n\n/**\n * @author alteredq / http://alteredqualia.com/\n */\n\nfunction Loader( manager ) {\n\n\tthis.manager = ( manager !== undefined ) ? manager : DefaultLoadingManager;\n\n\tthis.crossOrigin = 'anonymous';\n\tthis.path = '';\n\tthis.resourcePath = '';\n\n}\n\nObject.assign( Loader.prototype, {\n\n\tload: function ( /* url, onLoad, onProgress, onError */ ) {},\n\n\tparse: function ( /* data */ ) {},\n\n\tsetCrossOrigin: function ( crossOrigin ) {\n\n\t\tthis.crossOrigin = crossOrigin;\n\t\treturn this;\n\n\t},\n\n\tsetPath: function ( path ) {\n\n\t\tthis.path = path;\n\t\treturn this;\n\n\t},\n\n\tsetResourcePath: function ( resourcePath ) {\n\n\t\tthis.resourcePath = resourcePath;\n\t\treturn this;\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nvar loading = {};\n\nfunction FileLoader( manager ) {\n\n\tLoader.call( this, manager );\n\n}\n\nFileLoader.prototype = Object.assign( Object.create( Loader.prototype ), {\n\n\tconstructor: FileLoader,\n\n\tload: function ( url, onLoad, onProgress, onError ) {\n\n\t\tif ( url === undefined ) url = '';\n\n\t\tif ( this.path !== undefined ) url = this.path + url;\n\n\t\turl = this.manager.resolveURL( url );\n\n\t\tvar scope = this;\n\n\t\tvar cached = Cache.get( url );\n\n\t\tif ( cached !== undefined ) {\n\n\t\t\tscope.manager.itemStart( url );\n\n\t\t\tsetTimeout( function () {\n\n\t\t\t\tif ( onLoad ) onLoad( cached );\n\n\t\t\t\tscope.manager.itemEnd( url );\n\n\t\t\t}, 0 );\n\n\t\t\treturn cached;\n\n\t\t}\n\n\t\t// Check if request is duplicate\n\n\t\tif ( loading[ url ] !== undefined ) {\n\n\t\t\tloading[ url ].push( {\n\n\t\t\t\tonLoad: onLoad,\n\t\t\t\tonProgress: onProgress,\n\t\t\t\tonError: onError\n\n\t\t\t} );\n\n\t\t\treturn;\n\n\t\t}\n\n\t\t// Check for data: URI\n\t\tvar dataUriRegex = /^data:(.*?)(;base64)?,(.*)$/;\n\t\tvar dataUriRegexResult = url.match( dataUriRegex );\n\n\t\t// Safari can not handle Data URIs through XMLHttpRequest so process manually\n\t\tif ( dataUriRegexResult ) {\n\n\t\t\tvar mimeType = dataUriRegexResult[ 1 ];\n\t\t\tvar isBase64 = !! dataUriRegexResult[ 2 ];\n\t\t\tvar data = dataUriRegexResult[ 3 ];\n\n\t\t\tdata = decodeURIComponent( data );\n\n\t\t\tif ( isBase64 ) data = atob( data );\n\n\t\t\ttry {\n\n\t\t\t\tvar response;\n\t\t\t\tvar responseType = ( this.responseType || '' ).toLowerCase();\n\n\t\t\t\tswitch ( responseType ) {\n\n\t\t\t\t\tcase 'arraybuffer':\n\t\t\t\t\tcase 'blob':\n\n\t\t\t\t\t\tvar view = new Uint8Array( data.length );\n\n\t\t\t\t\t\tfor ( var i = 0; i < data.length; i ++ ) {\n\n\t\t\t\t\t\t\tview[ i ] = data.charCodeAt( i );\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tif ( responseType === 'blob' ) {\n\n\t\t\t\t\t\t\tresponse = new Blob( [ view.buffer ], { type: mimeType } );\n\n\t\t\t\t\t\t} else {\n\n\t\t\t\t\t\t\tresponse = view.buffer;\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'document':\n\n\t\t\t\t\t\tvar parser = new DOMParser();\n\t\t\t\t\t\tresponse = parser.parseFromString( data, mimeType );\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'json':\n\n\t\t\t\t\t\tresponse = JSON.parse( data );\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tdefault: // 'text' or other\n\n\t\t\t\t\t\tresponse = data;\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t}\n\n\t\t\t\t// Wait for next browser tick like standard XMLHttpRequest event dispatching does\n\t\t\t\tsetTimeout( function () {\n\n\t\t\t\t\tif ( onLoad ) onLoad( response );\n\n\t\t\t\t\tscope.manager.itemEnd( url );\n\n\t\t\t\t}, 0 );\n\n\t\t\t} catch ( error ) {\n\n\t\t\t\t// Wait for next browser tick like standard XMLHttpRequest event dispatching does\n\t\t\t\tsetTimeout( function () {\n\n\t\t\t\t\tif ( onError ) onError( error );\n\n\t\t\t\t\tscope.manager.itemError( url );\n\t\t\t\t\tscope.manager.itemEnd( url );\n\n\t\t\t\t}, 0 );\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\t// Initialise array for duplicate requests\n\n\t\t\tloading[ url ] = [];\n\n\t\t\tloading[ url ].push( {\n\n\t\t\t\tonLoad: onLoad,\n\t\t\t\tonProgress: onProgress,\n\t\t\t\tonError: onError\n\n\t\t\t} );\n\n\t\t\tvar request = new XMLHttpRequest();\n\n\t\t\trequest.open( 'GET', url, true );\n\n\t\t\trequest.addEventListener( 'load', function ( event ) {\n\n\t\t\t\tvar response = this.response;\n\n\t\t\t\tvar callbacks = loading[ url ];\n\n\t\t\t\tdelete loading[ url ];\n\n\t\t\t\tif ( this.status === 200 || this.status === 0 ) {\n\n\t\t\t\t\t// Some browsers return HTTP Status 0 when using non-http protocol\n\t\t\t\t\t// e.g. 'file://' or 'data://'. Handle as success.\n\n\t\t\t\t\tif ( this.status === 0 ) console.warn( 'THREE.FileLoader: HTTP Status 0 received.' );\n\n\t\t\t\t\t// Add to cache only on HTTP success, so that we do not cache\n\t\t\t\t\t// error response bodies as proper responses to requests.\n\t\t\t\t\tCache.add( url, response );\n\n\t\t\t\t\tfor ( var i = 0, il = callbacks.length; i < il; i ++ ) {\n\n\t\t\t\t\t\tvar callback = callbacks[ i ];\n\t\t\t\t\t\tif ( callback.onLoad ) callback.onLoad( response );\n\n\t\t\t\t\t}\n\n\t\t\t\t\tscope.manager.itemEnd( url );\n\n\t\t\t\t} else {\n\n\t\t\t\t\tfor ( var i = 0, il = callbacks.length; i < il; i ++ ) {\n\n\t\t\t\t\t\tvar callback = callbacks[ i ];\n\t\t\t\t\t\tif ( callback.onError ) callback.onError( event );\n\n\t\t\t\t\t}\n\n\t\t\t\t\tscope.manager.itemError( url );\n\t\t\t\t\tscope.manager.itemEnd( url );\n\n\t\t\t\t}\n\n\t\t\t}, false );\n\n\t\t\trequest.addEventListener( 'progress', function ( event ) {\n\n\t\t\t\tvar callbacks = loading[ url ];\n\n\t\t\t\tfor ( var i = 0, il = callbacks.length; i < il; i ++ ) {\n\n\t\t\t\t\tvar callback = callbacks[ i ];\n\t\t\t\t\tif ( callback.onProgress ) callback.onProgress( event );\n\n\t\t\t\t}\n\n\t\t\t}, false );\n\n\t\t\trequest.addEventListener( 'error', function ( event ) {\n\n\t\t\t\tvar callbacks = loading[ url ];\n\n\t\t\t\tdelete loading[ url ];\n\n\t\t\t\tfor ( var i = 0, il = callbacks.length; i < il; i ++ ) {\n\n\t\t\t\t\tvar callback = callbacks[ i ];\n\t\t\t\t\tif ( callback.onError ) callback.onError( event );\n\n\t\t\t\t}\n\n\t\t\t\tscope.manager.itemError( url );\n\t\t\t\tscope.manager.itemEnd( url );\n\n\t\t\t}, false );\n\n\t\t\trequest.addEventListener( 'abort', function ( event ) {\n\n\t\t\t\tvar callbacks = loading[ url ];\n\n\t\t\t\tdelete loading[ url ];\n\n\t\t\t\tfor ( var i = 0, il = callbacks.length; i < il; i ++ ) {\n\n\t\t\t\t\tvar callback = callbacks[ i ];\n\t\t\t\t\tif ( callback.onError ) callback.onError( event );\n\n\t\t\t\t}\n\n\t\t\t\tscope.manager.itemError( url );\n\t\t\t\tscope.manager.itemEnd( url );\n\n\t\t\t}, false );\n\n\t\t\tif ( this.responseType !== undefined ) request.responseType = this.responseType;\n\t\t\tif ( this.withCredentials !== undefined ) request.withCredentials = this.withCredentials;\n\n\t\t\tif ( request.overrideMimeType ) request.overrideMimeType( this.mimeType !== undefined ? this.mimeType : 'text/plain' );\n\n\t\t\tfor ( var header in this.requestHeader ) {\n\n\t\t\t\trequest.setRequestHeader( header, this.requestHeader[ header ] );\n\n\t\t\t}\n\n\t\t\trequest.send( null );\n\n\t\t}\n\n\t\tscope.manager.itemStart( url );\n\n\t\treturn request;\n\n\t},\n\n\tsetResponseType: function ( value ) {\n\n\t\tthis.responseType = value;\n\t\treturn this;\n\n\t},\n\n\tsetWithCredentials: function ( value ) {\n\n\t\tthis.withCredentials = value;\n\t\treturn this;\n\n\t},\n\n\tsetMimeType: function ( value ) {\n\n\t\tthis.mimeType = value;\n\t\treturn this;\n\n\t},\n\n\tsetRequestHeader: function ( value ) {\n\n\t\tthis.requestHeader = value;\n\t\treturn this;\n\n\t}\n\n} );\n\n/**\n * @author bhouston / http://clara.io/\n */\n\nfunction AnimationLoader( manager ) {\n\n\tLoader.call( this, manager );\n\n}\n\nAnimationLoader.prototype = Object.assign( Object.create( Loader.prototype ), {\n\n\tconstructor: AnimationLoader,\n\n\tload: function ( url, onLoad, onProgress, onError ) {\n\n\t\tvar scope = this;\n\n\t\tvar loader = new FileLoader( scope.manager );\n\t\tloader.setPath( scope.path );\n\t\tloader.load( url, function ( text ) {\n\n\t\t\tonLoad( scope.parse( JSON.parse( text ) ) );\n\n\t\t}, onProgress, onError );\n\n\t},\n\n\tparse: function ( json ) {\n\n\t\tvar animations = [];\n\n\t\tfor ( var i = 0; i < json.length; i ++ ) {\n\n\t\t\tvar clip = AnimationClip.parse( json[ i ] );\n\n\t\t\tanimations.push( clip );\n\n\t\t}\n\n\t\treturn animations;\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n *\n * Abstract Base class to block based textures loader (dds, pvr, ...)\n *\n * Sub classes have to implement the parse() method which will be used in load().\n */\n\nfunction CompressedTextureLoader( manager ) {\n\n\tLoader.call( this, manager );\n\n}\n\nCompressedTextureLoader.prototype = Object.assign( Object.create( Loader.prototype ), {\n\n\tconstructor: CompressedTextureLoader,\n\n\tload: function ( url, onLoad, onProgress, onError ) {\n\n\t\tvar scope = this;\n\n\t\tvar images = [];\n\n\t\tvar texture = new CompressedTexture();\n\t\ttexture.image = images;\n\n\t\tvar loader = new FileLoader( this.manager );\n\t\tloader.setPath( this.path );\n\t\tloader.setResponseType( 'arraybuffer' );\n\n\t\tfunction loadTexture( i ) {\n\n\t\t\tloader.load( url[ i ], function ( buffer ) {\n\n\t\t\t\tvar texDatas = scope.parse( buffer, true );\n\n\t\t\t\timages[ i ] = {\n\t\t\t\t\twidth: texDatas.width,\n\t\t\t\t\theight: texDatas.height,\n\t\t\t\t\tformat: texDatas.format,\n\t\t\t\t\tmipmaps: texDatas.mipmaps\n\t\t\t\t};\n\n\t\t\t\tloaded += 1;\n\n\t\t\t\tif ( loaded === 6 ) {\n\n\t\t\t\t\tif ( texDatas.mipmapCount === 1 )\n\t\t\t\t\t\ttexture.minFilter = LinearFilter;\n\n\t\t\t\t\ttexture.format = texDatas.format;\n\t\t\t\t\ttexture.needsUpdate = true;\n\n\t\t\t\t\tif ( onLoad ) onLoad( texture );\n\n\t\t\t\t}\n\n\t\t\t}, onProgress, onError );\n\n\t\t}\n\n\t\tif ( Array.isArray( url ) ) {\n\n\t\t\tvar loaded = 0;\n\n\t\t\tfor ( var i = 0, il = url.length; i < il; ++ i ) {\n\n\t\t\t\tloadTexture( i );\n\n\t\t\t}\n\n\t\t} else {\n\n\t\t\t// compressed cubemap texture stored in a single DDS file\n\n\t\t\tloader.load( url, function ( buffer ) {\n\n\t\t\t\tvar texDatas = scope.parse( buffer, true );\n\n\t\t\t\tif ( texDatas.isCubemap ) {\n\n\t\t\t\t\tvar faces = texDatas.mipmaps.length / texDatas.mipmapCount;\n\n\t\t\t\t\tfor ( var f = 0; f < faces; f ++ ) {\n\n\t\t\t\t\t\timages[ f ] = { mipmaps: [] };\n\n\t\t\t\t\t\tfor ( var i = 0; i < texDatas.mipmapCount; i ++ ) {\n\n\t\t\t\t\t\t\timages[ f ].mipmaps.push( texDatas.mipmaps[ f * texDatas.mipmapCount + i ] );\n\t\t\t\t\t\t\timages[ f ].format = texDatas.format;\n\t\t\t\t\t\t\timages[ f ].width = texDatas.width;\n\t\t\t\t\t\t\timages[ f ].height = texDatas.height;\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t} else {\n\n\t\t\t\t\ttexture.image.width = texDatas.width;\n\t\t\t\t\ttexture.image.height = texDatas.height;\n\t\t\t\t\ttexture.mipmaps = texDatas.mipmaps;\n\n\t\t\t\t}\n\n\t\t\t\tif ( texDatas.mipmapCount === 1 ) {\n\n\t\t\t\t\ttexture.minFilter = LinearFilter;\n\n\t\t\t\t}\n\n\t\t\t\ttexture.format = texDatas.format;\n\t\t\t\ttexture.needsUpdate = true;\n\n\t\t\t\tif ( onLoad ) onLoad( texture );\n\n\t\t\t}, onProgress, onError );\n\n\t\t}\n\n\t\treturn texture;\n\n\t}\n\n} );\n\n/**\n * @author Nikos M. / https://github.com/foo123/\n *\n * Abstract Base class to load generic binary textures formats (rgbe, hdr, ...)\n *\n * Sub classes have to implement the parse() method which will be used in load().\n */\n\nfunction DataTextureLoader( manager ) {\n\n\tLoader.call( this, manager );\n\n}\n\nDataTextureLoader.prototype = Object.assign( Object.create( Loader.prototype ), {\n\n\tconstructor: DataTextureLoader,\n\n\tload: function ( url, onLoad, onProgress, onError ) {\n\n\t\tvar scope = this;\n\n\t\tvar texture = new DataTexture();\n\n\t\tvar loader = new FileLoader( this.manager );\n\t\tloader.setResponseType( 'arraybuffer' );\n\t\tloader.setPath( this.path );\n\t\tloader.load( url, function ( buffer ) {\n\n\t\t\tvar texData = scope.parse( buffer );\n\n\t\t\tif ( ! texData ) return;\n\n\t\t\tif ( texData.image !== undefined ) {\n\n\t\t\t\ttexture.image = texData.image;\n\n\t\t\t} else if ( texData.data !== undefined ) {\n\n\t\t\t\ttexture.image.width = texData.width;\n\t\t\t\ttexture.image.height = texData.height;\n\t\t\t\ttexture.image.data = texData.data;\n\n\t\t\t}\n\n\t\t\ttexture.wrapS = texData.wrapS !== undefined ? texData.wrapS : ClampToEdgeWrapping;\n\t\t\ttexture.wrapT = texData.wrapT !== undefined ? texData.wrapT : ClampToEdgeWrapping;\n\n\t\t\ttexture.magFilter = texData.magFilter !== undefined ? texData.magFilter : LinearFilter;\n\t\t\ttexture.minFilter = texData.minFilter !== undefined ? texData.minFilter : LinearFilter;\n\n\t\t\ttexture.anisotropy = texData.anisotropy !== undefined ? texData.anisotropy : 1;\n\n\t\t\tif ( texData.format !== undefined ) {\n\n\t\t\t\ttexture.format = texData.format;\n\n\t\t\t}\n\t\t\tif ( texData.type !== undefined ) {\n\n\t\t\t\ttexture.type = texData.type;\n\n\t\t\t}\n\n\t\t\tif ( texData.mipmaps !== undefined ) {\n\n\t\t\t\ttexture.mipmaps = texData.mipmaps;\n\t\t\t\ttexture.minFilter = LinearMipmapLinearFilter; // presumably...\n\n\t\t\t}\n\n\t\t\tif ( texData.mipmapCount === 1 ) {\n\n\t\t\t\ttexture.minFilter = LinearFilter;\n\n\t\t\t}\n\n\t\t\ttexture.needsUpdate = true;\n\n\t\t\tif ( onLoad ) onLoad( texture, texData );\n\n\t\t}, onProgress, onError );\n\n\n\t\treturn texture;\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction ImageLoader( manager ) {\n\n\tLoader.call( this, manager );\n\n}\n\nImageLoader.prototype = Object.assign( Object.create( Loader.prototype ), {\n\n\tconstructor: ImageLoader,\n\n\tload: function ( url, onLoad, onProgress, onError ) {\n\n\t\tif ( this.path !== undefined ) url = this.path + url;\n\n\t\turl = this.manager.resolveURL( url );\n\n\t\tvar scope = this;\n\n\t\tvar cached = Cache.get( url );\n\n\t\tif ( cached !== undefined ) {\n\n\t\t\tscope.manager.itemStart( url );\n\n\t\t\tsetTimeout( function () {\n\n\t\t\t\tif ( onLoad ) onLoad( cached );\n\n\t\t\t\tscope.manager.itemEnd( url );\n\n\t\t\t}, 0 );\n\n\t\t\treturn cached;\n\n\t\t}\n\n\t\tvar image = document.createElementNS( 'http://www.w3.org/1999/xhtml', 'img' );\n\n\t\tfunction onImageLoad() {\n\n\t\t\timage.removeEventListener( 'load', onImageLoad, false );\n\t\t\timage.removeEventListener( 'error', onImageError, false );\n\n\t\t\tCache.add( url, this );\n\n\t\t\tif ( onLoad ) onLoad( this );\n\n\t\t\tscope.manager.itemEnd( url );\n\n\t\t}\n\n\t\tfunction onImageError( event ) {\n\n\t\t\timage.removeEventListener( 'load', onImageLoad, false );\n\t\t\timage.removeEventListener( 'error', onImageError, false );\n\n\t\t\tif ( onError ) onError( event );\n\n\t\t\tscope.manager.itemError( url );\n\t\t\tscope.manager.itemEnd( url );\n\n\t\t}\n\n\t\timage.addEventListener( 'load', onImageLoad, false );\n\t\timage.addEventListener( 'error', onImageError, false );\n\n\t\tif ( url.substr( 0, 5 ) !== 'data:' ) {\n\n\t\t\tif ( this.crossOrigin !== undefined ) image.crossOrigin = this.crossOrigin;\n\n\t\t}\n\n\t\tscope.manager.itemStart( url );\n\n\t\timage.src = url;\n\n\t\treturn image;\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\n\nfunction CubeTextureLoader( manager ) {\n\n\tLoader.call( this, manager );\n\n}\n\nCubeTextureLoader.prototype = Object.assign( Object.create( Loader.prototype ), {\n\n\tconstructor: CubeTextureLoader,\n\n\tload: function ( urls, onLoad, onProgress, onError ) {\n\n\t\tvar texture = new CubeTexture();\n\n\t\tvar loader = new ImageLoader( this.manager );\n\t\tloader.setCrossOrigin( this.crossOrigin );\n\t\tloader.setPath( this.path );\n\n\t\tvar loaded = 0;\n\n\t\tfunction loadTexture( i ) {\n\n\t\t\tloader.load( urls[ i ], function ( image ) {\n\n\t\t\t\ttexture.images[ i ] = image;\n\n\t\t\t\tloaded ++;\n\n\t\t\t\tif ( loaded === 6 ) {\n\n\t\t\t\t\ttexture.needsUpdate = true;\n\n\t\t\t\t\tif ( onLoad ) onLoad( texture );\n\n\t\t\t\t}\n\n\t\t\t}, undefined, onError );\n\n\t\t}\n\n\t\tfor ( var i = 0; i < urls.length; ++ i ) {\n\n\t\t\tloadTexture( i );\n\n\t\t}\n\n\t\treturn texture;\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction TextureLoader( manager ) {\n\n\tLoader.call( this, manager );\n\n}\n\nTextureLoader.prototype = Object.assign( Object.create( Loader.prototype ), {\n\n\tconstructor: TextureLoader,\n\n\tload: function ( url, onLoad, onProgress, onError ) {\n\n\t\tvar texture = new Texture();\n\n\t\tvar loader = new ImageLoader( this.manager );\n\t\tloader.setCrossOrigin( this.crossOrigin );\n\t\tloader.setPath( this.path );\n\n\t\tloader.load( url, function ( image ) {\n\n\t\t\ttexture.image = image;\n\n\t\t\t// JPEGs can't have an alpha channel, so memory can be saved by storing them as RGB.\n\t\t\tvar isJPEG = url.search( /\\.jpe?g($|\\?)/i ) > 0 || url.search( /^data\\:image\\/jpeg/ ) === 0;\n\n\t\t\ttexture.format = isJPEG ? RGBFormat : RGBAFormat;\n\t\t\ttexture.needsUpdate = true;\n\n\t\t\tif ( onLoad !== undefined ) {\n\n\t\t\t\tonLoad( texture );\n\n\t\t\t}\n\n\t\t}, onProgress, onError );\n\n\t\treturn texture;\n\n\t}\n\n} );\n\n/**\n * @author zz85 / http://www.lab4games.net/zz85/blog\n * Extensible curve object\n *\n * Some common of curve methods:\n * .getPoint( t, optionalTarget ), .getTangent( t )\n * .getPointAt( u, optionalTarget ), .getTangentAt( u )\n * .getPoints(), .getSpacedPoints()\n * .getLength()\n * .updateArcLengths()\n *\n * This following curves inherit from THREE.Curve:\n *\n * -- 2D curves --\n * THREE.ArcCurve\n * THREE.CubicBezierCurve\n * THREE.EllipseCurve\n * THREE.LineCurve\n * THREE.QuadraticBezierCurve\n * THREE.SplineCurve\n *\n * -- 3D curves --\n * THREE.CatmullRomCurve3\n * THREE.CubicBezierCurve3\n * THREE.LineCurve3\n * THREE.QuadraticBezierCurve3\n *\n * A series of curves can be represented as a THREE.CurvePath.\n *\n **/\n\n/**************************************************************\n *\tAbstract Curve base class\n **************************************************************/\n\nfunction Curve() {\n\n\tthis.type = 'Curve';\n\n\tthis.arcLengthDivisions = 200;\n\n}\n\nObject.assign( Curve.prototype, {\n\n\t// Virtual base class method to overwrite and implement in subclasses\n\t//\t- t [0 .. 1]\n\n\tgetPoint: function ( /* t, optionalTarget */ ) {\n\n\t\tconsole.warn( 'THREE.Curve: .getPoint() not implemented.' );\n\t\treturn null;\n\n\t},\n\n\t// Get point at relative position in curve according to arc length\n\t// - u [0 .. 1]\n\n\tgetPointAt: function ( u, optionalTarget ) {\n\n\t\tvar t = this.getUtoTmapping( u );\n\t\treturn this.getPoint( t, optionalTarget );\n\n\t},\n\n\t// Get sequence of points using getPoint( t )\n\n\tgetPoints: function ( divisions ) {\n\n\t\tif ( divisions === undefined ) divisions = 5;\n\n\t\tvar points = [];\n\n\t\tfor ( var d = 0; d <= divisions; d ++ ) {\n\n\t\t\tpoints.push( this.getPoint( d / divisions ) );\n\n\t\t}\n\n\t\treturn points;\n\n\t},\n\n\t// Get sequence of points using getPointAt( u )\n\n\tgetSpacedPoints: function ( divisions ) {\n\n\t\tif ( divisions === undefined ) divisions = 5;\n\n\t\tvar points = [];\n\n\t\tfor ( var d = 0; d <= divisions; d ++ ) {\n\n\t\t\tpoints.push( this.getPointAt( d / divisions ) );\n\n\t\t}\n\n\t\treturn points;\n\n\t},\n\n\t// Get total curve arc length\n\n\tgetLength: function () {\n\n\t\tvar lengths = this.getLengths();\n\t\treturn lengths[ lengths.length - 1 ];\n\n\t},\n\n\t// Get list of cumulative segment lengths\n\n\tgetLengths: function ( divisions ) {\n\n\t\tif ( divisions === undefined ) divisions = this.arcLengthDivisions;\n\n\t\tif ( this.cacheArcLengths &&\n\t\t\t( this.cacheArcLengths.length === divisions + 1 ) &&\n\t\t\t! this.needsUpdate ) {\n\n\t\t\treturn this.cacheArcLengths;\n\n\t\t}\n\n\t\tthis.needsUpdate = false;\n\n\t\tvar cache = [];\n\t\tvar current, last = this.getPoint( 0 );\n\t\tvar p, sum = 0;\n\n\t\tcache.push( 0 );\n\n\t\tfor ( p = 1; p <= divisions; p ++ ) {\n\n\t\t\tcurrent = this.getPoint( p / divisions );\n\t\t\tsum += current.distanceTo( last );\n\t\t\tcache.push( sum );\n\t\t\tlast = current;\n\n\t\t}\n\n\t\tthis.cacheArcLengths = cache;\n\n\t\treturn cache; // { sums: cache, sum: sum }; Sum is in the last element.\n\n\t},\n\n\tupdateArcLengths: function () {\n\n\t\tthis.needsUpdate = true;\n\t\tthis.getLengths();\n\n\t},\n\n\t// Given u ( 0 .. 1 ), get a t to find p. This gives you points which are equidistant\n\n\tgetUtoTmapping: function ( u, distance ) {\n\n\t\tvar arcLengths = this.getLengths();\n\n\t\tvar i = 0, il = arcLengths.length;\n\n\t\tvar targetArcLength; // The targeted u distance value to get\n\n\t\tif ( distance ) {\n\n\t\t\ttargetArcLength = distance;\n\n\t\t} else {\n\n\t\t\ttargetArcLength = u * arcLengths[ il - 1 ];\n\n\t\t}\n\n\t\t// binary search for the index with largest value smaller than target u distance\n\n\t\tvar low = 0, high = il - 1, comparison;\n\n\t\twhile ( low <= high ) {\n\n\t\t\ti = Math.floor( low + ( high - low ) / 2 ); // less likely to overflow, though probably not issue here, JS doesn't really have integers, all numbers are floats\n\n\t\t\tcomparison = arcLengths[ i ] - targetArcLength;\n\n\t\t\tif ( comparison < 0 ) {\n\n\t\t\t\tlow = i + 1;\n\n\t\t\t} else if ( comparison > 0 ) {\n\n\t\t\t\thigh = i - 1;\n\n\t\t\t} else {\n\n\t\t\t\thigh = i;\n\t\t\t\tbreak;\n\n\t\t\t\t// DONE\n\n\t\t\t}\n\n\t\t}\n\n\t\ti = high;\n\n\t\tif ( arcLengths[ i ] === targetArcLength ) {\n\n\t\t\treturn i / ( il - 1 );\n\n\t\t}\n\n\t\t// we could get finer grain at lengths, or use simple interpolation between two points\n\n\t\tvar lengthBefore = arcLengths[ i ];\n\t\tvar lengthAfter = arcLengths[ i + 1 ];\n\n\t\tvar segmentLength = lengthAfter - lengthBefore;\n\n\t\t// determine where we are between the 'before' and 'after' points\n\n\t\tvar segmentFraction = ( targetArcLength - lengthBefore ) / segmentLength;\n\n\t\t// add that fractional amount to t\n\n\t\tvar t = ( i + segmentFraction ) / ( il - 1 );\n\n\t\treturn t;\n\n\t},\n\n\t// Returns a unit vector tangent at t\n\t// In case any sub curve does not implement its tangent derivation,\n\t// 2 points a small delta apart will be used to find its gradient\n\t// which seems to give a reasonable approximation\n\n\tgetTangent: function ( t ) {\n\n\t\tvar delta = 0.0001;\n\t\tvar t1 = t - delta;\n\t\tvar t2 = t + delta;\n\n\t\t// Capping in case of danger\n\n\t\tif ( t1 < 0 ) t1 = 0;\n\t\tif ( t2 > 1 ) t2 = 1;\n\n\t\tvar pt1 = this.getPoint( t1 );\n\t\tvar pt2 = this.getPoint( t2 );\n\n\t\tvar vec = pt2.clone().sub( pt1 );\n\t\treturn vec.normalize();\n\n\t},\n\n\tgetTangentAt: function ( u ) {\n\n\t\tvar t = this.getUtoTmapping( u );\n\t\treturn this.getTangent( t );\n\n\t},\n\n\tcomputeFrenetFrames: function ( segments, closed ) {\n\n\t\t// see http://www.cs.indiana.edu/pub/techreports/TR425.pdf\n\n\t\tvar normal = new Vector3();\n\n\t\tvar tangents = [];\n\t\tvar normals = [];\n\t\tvar binormals = [];\n\n\t\tvar vec = new Vector3();\n\t\tvar mat = new Matrix4();\n\n\t\tvar i, u, theta;\n\n\t\t// compute the tangent vectors for each segment on the curve\n\n\t\tfor ( i = 0; i <= segments; i ++ ) {\n\n\t\t\tu = i / segments;\n\n\t\t\ttangents[ i ] = this.getTangentAt( u );\n\t\t\ttangents[ i ].normalize();\n\n\t\t}\n\n\t\t// select an initial normal vector perpendicular to the first tangent vector,\n\t\t// and in the direction of the minimum tangent xyz component\n\n\t\tnormals[ 0 ] = new Vector3();\n\t\tbinormals[ 0 ] = new Vector3();\n\t\tvar min = Number.MAX_VALUE;\n\t\tvar tx = Math.abs( tangents[ 0 ].x );\n\t\tvar ty = Math.abs( tangents[ 0 ].y );\n\t\tvar tz = Math.abs( tangents[ 0 ].z );\n\n\t\tif ( tx <= min ) {\n\n\t\t\tmin = tx;\n\t\t\tnormal.set( 1, 0, 0 );\n\n\t\t}\n\n\t\tif ( ty <= min ) {\n\n\t\t\tmin = ty;\n\t\t\tnormal.set( 0, 1, 0 );\n\n\t\t}\n\n\t\tif ( tz <= min ) {\n\n\t\t\tnormal.set( 0, 0, 1 );\n\n\t\t}\n\n\t\tvec.crossVectors( tangents[ 0 ], normal ).normalize();\n\n\t\tnormals[ 0 ].crossVectors( tangents[ 0 ], vec );\n\t\tbinormals[ 0 ].crossVectors( tangents[ 0 ], normals[ 0 ] );\n\n\n\t\t// compute the slowly-varying normal and binormal vectors for each segment on the curve\n\n\t\tfor ( i = 1; i <= segments; i ++ ) {\n\n\t\t\tnormals[ i ] = normals[ i - 1 ].clone();\n\n\t\t\tbinormals[ i ] = binormals[ i - 1 ].clone();\n\n\t\t\tvec.crossVectors( tangents[ i - 1 ], tangents[ i ] );\n\n\t\t\tif ( vec.length() > Number.EPSILON ) {\n\n\t\t\t\tvec.normalize();\n\n\t\t\t\ttheta = Math.acos( MathUtils.clamp( tangents[ i - 1 ].dot( tangents[ i ] ), - 1, 1 ) ); // clamp for floating pt errors\n\n\t\t\t\tnormals[ i ].applyMatrix4( mat.makeRotationAxis( vec, theta ) );\n\n\t\t\t}\n\n\t\t\tbinormals[ i ].crossVectors( tangents[ i ], normals[ i ] );\n\n\t\t}\n\n\t\t// if the curve is closed, postprocess the vectors so the first and last normal vectors are the same\n\n\t\tif ( closed === true ) {\n\n\t\t\ttheta = Math.acos( MathUtils.clamp( normals[ 0 ].dot( normals[ segments ] ), - 1, 1 ) );\n\t\t\ttheta /= segments;\n\n\t\t\tif ( tangents[ 0 ].dot( vec.crossVectors( normals[ 0 ], normals[ segments ] ) ) > 0 ) {\n\n\t\t\t\ttheta = - theta;\n\n\t\t\t}\n\n\t\t\tfor ( i = 1; i <= segments; i ++ ) {\n\n\t\t\t\t// twist a little...\n\t\t\t\tnormals[ i ].applyMatrix4( mat.makeRotationAxis( tangents[ i ], theta * i ) );\n\t\t\t\tbinormals[ i ].crossVectors( tangents[ i ], normals[ i ] );\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn {\n\t\t\ttangents: tangents,\n\t\t\tnormals: normals,\n\t\t\tbinormals: binormals\n\t\t};\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor().copy( this );\n\n\t},\n\n\tcopy: function ( source ) {\n\n\t\tthis.arcLengthDivisions = source.arcLengthDivisions;\n\n\t\treturn this;\n\n\t},\n\n\ttoJSON: function () {\n\n\t\tvar data = {\n\t\t\tmetadata: {\n\t\t\t\tversion: 4.5,\n\t\t\t\ttype: 'Curve',\n\t\t\t\tgenerator: 'Curve.toJSON'\n\t\t\t}\n\t\t};\n\n\t\tdata.arcLengthDivisions = this.arcLengthDivisions;\n\t\tdata.type = this.type;\n\n\t\treturn data;\n\n\t},\n\n\tfromJSON: function ( json ) {\n\n\t\tthis.arcLengthDivisions = json.arcLengthDivisions;\n\n\t\treturn this;\n\n\t}\n\n} );\n\nfunction EllipseCurve( aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation ) {\n\n\tCurve.call( this );\n\n\tthis.type = 'EllipseCurve';\n\n\tthis.aX = aX || 0;\n\tthis.aY = aY || 0;\n\n\tthis.xRadius = xRadius || 1;\n\tthis.yRadius = yRadius || 1;\n\n\tthis.aStartAngle = aStartAngle || 0;\n\tthis.aEndAngle = aEndAngle || 2 * Math.PI;\n\n\tthis.aClockwise = aClockwise || false;\n\n\tthis.aRotation = aRotation || 0;\n\n}\n\nEllipseCurve.prototype = Object.create( Curve.prototype );\nEllipseCurve.prototype.constructor = EllipseCurve;\n\nEllipseCurve.prototype.isEllipseCurve = true;\n\nEllipseCurve.prototype.getPoint = function ( t, optionalTarget ) {\n\n\tvar point = optionalTarget || new Vector2();\n\n\tvar twoPi = Math.PI * 2;\n\tvar deltaAngle = this.aEndAngle - this.aStartAngle;\n\tvar samePoints = Math.abs( deltaAngle ) < Number.EPSILON;\n\n\t// ensures that deltaAngle is 0 .. 2 PI\n\twhile ( deltaAngle < 0 ) deltaAngle += twoPi;\n\twhile ( deltaAngle > twoPi ) deltaAngle -= twoPi;\n\n\tif ( deltaAngle < Number.EPSILON ) {\n\n\t\tif ( samePoints ) {\n\n\t\t\tdeltaAngle = 0;\n\n\t\t} else {\n\n\t\t\tdeltaAngle = twoPi;\n\n\t\t}\n\n\t}\n\n\tif ( this.aClockwise === true && ! samePoints ) {\n\n\t\tif ( deltaAngle === twoPi ) {\n\n\t\t\tdeltaAngle = - twoPi;\n\n\t\t} else {\n\n\t\t\tdeltaAngle = deltaAngle - twoPi;\n\n\t\t}\n\n\t}\n\n\tvar angle = this.aStartAngle + t * deltaAngle;\n\tvar x = this.aX + this.xRadius * Math.cos( angle );\n\tvar y = this.aY + this.yRadius * Math.sin( angle );\n\n\tif ( this.aRotation !== 0 ) {\n\n\t\tvar cos = Math.cos( this.aRotation );\n\t\tvar sin = Math.sin( this.aRotation );\n\n\t\tvar tx = x - this.aX;\n\t\tvar ty = y - this.aY;\n\n\t\t// Rotate the point about the center of the ellipse.\n\t\tx = tx * cos - ty * sin + this.aX;\n\t\ty = tx * sin + ty * cos + this.aY;\n\n\t}\n\n\treturn point.set( x, y );\n\n};\n\nEllipseCurve.prototype.copy = function ( source ) {\n\n\tCurve.prototype.copy.call( this, source );\n\n\tthis.aX = source.aX;\n\tthis.aY = source.aY;\n\n\tthis.xRadius = source.xRadius;\n\tthis.yRadius = source.yRadius;\n\n\tthis.aStartAngle = source.aStartAngle;\n\tthis.aEndAngle = source.aEndAngle;\n\n\tthis.aClockwise = source.aClockwise;\n\n\tthis.aRotation = source.aRotation;\n\n\treturn this;\n\n};\n\n\nEllipseCurve.prototype.toJSON = function () {\n\n\tvar data = Curve.prototype.toJSON.call( this );\n\n\tdata.aX = this.aX;\n\tdata.aY = this.aY;\n\n\tdata.xRadius = this.xRadius;\n\tdata.yRadius = this.yRadius;\n\n\tdata.aStartAngle = this.aStartAngle;\n\tdata.aEndAngle = this.aEndAngle;\n\n\tdata.aClockwise = this.aClockwise;\n\n\tdata.aRotation = this.aRotation;\n\n\treturn data;\n\n};\n\nEllipseCurve.prototype.fromJSON = function ( json ) {\n\n\tCurve.prototype.fromJSON.call( this, json );\n\n\tthis.aX = json.aX;\n\tthis.aY = json.aY;\n\n\tthis.xRadius = json.xRadius;\n\tthis.yRadius = json.yRadius;\n\n\tthis.aStartAngle = json.aStartAngle;\n\tthis.aEndAngle = json.aEndAngle;\n\n\tthis.aClockwise = json.aClockwise;\n\n\tthis.aRotation = json.aRotation;\n\n\treturn this;\n\n};\n\nfunction ArcCurve( aX, aY, aRadius, aStartAngle, aEndAngle, aClockwise ) {\n\n\tEllipseCurve.call( this, aX, aY, aRadius, aRadius, aStartAngle, aEndAngle, aClockwise );\n\n\tthis.type = 'ArcCurve';\n\n}\n\nArcCurve.prototype = Object.create( EllipseCurve.prototype );\nArcCurve.prototype.constructor = ArcCurve;\n\nArcCurve.prototype.isArcCurve = true;\n\n/**\n * @author zz85 https://github.com/zz85\n *\n * Centripetal CatmullRom Curve - which is useful for avoiding\n * cusps and self-intersections in non-uniform catmull rom curves.\n * http://www.cemyuksel.com/research/catmullrom_param/catmullrom.pdf\n *\n * curve.type accepts centripetal(default), chordal and catmullrom\n * curve.tension is used for catmullrom which defaults to 0.5\n */\n\n\n/*\nBased on an optimized c++ solution in\n - http://stackoverflow.com/questions/9489736/catmull-rom-curve-with-no-cusps-and-no-self-intersections/\n - http://ideone.com/NoEbVM\n\nThis CubicPoly class could be used for reusing some variables and calculations,\nbut for three.js curve use, it could be possible inlined and flatten into a single function call\nwhich can be placed in CurveUtils.\n*/\n\nfunction CubicPoly() {\n\n\tvar c0 = 0, c1 = 0, c2 = 0, c3 = 0;\n\n\t/*\n\t * Compute coefficients for a cubic polynomial\n\t *   p(s) = c0 + c1*s + c2*s^2 + c3*s^3\n\t * such that\n\t *   p(0) = x0, p(1) = x1\n\t *  and\n\t *   p'(0) = t0, p'(1) = t1.\n\t */\n\tfunction init( x0, x1, t0, t1 ) {\n\n\t\tc0 = x0;\n\t\tc1 = t0;\n\t\tc2 = - 3 * x0 + 3 * x1 - 2 * t0 - t1;\n\t\tc3 = 2 * x0 - 2 * x1 + t0 + t1;\n\n\t}\n\n\treturn {\n\n\t\tinitCatmullRom: function ( x0, x1, x2, x3, tension ) {\n\n\t\t\tinit( x1, x2, tension * ( x2 - x0 ), tension * ( x3 - x1 ) );\n\n\t\t},\n\n\t\tinitNonuniformCatmullRom: function ( x0, x1, x2, x3, dt0, dt1, dt2 ) {\n\n\t\t\t// compute tangents when parameterized in [t1,t2]\n\t\t\tvar t1 = ( x1 - x0 ) / dt0 - ( x2 - x0 ) / ( dt0 + dt1 ) + ( x2 - x1 ) / dt1;\n\t\t\tvar t2 = ( x2 - x1 ) / dt1 - ( x3 - x1 ) / ( dt1 + dt2 ) + ( x3 - x2 ) / dt2;\n\n\t\t\t// rescale tangents for parametrization in [0,1]\n\t\t\tt1 *= dt1;\n\t\t\tt2 *= dt1;\n\n\t\t\tinit( x1, x2, t1, t2 );\n\n\t\t},\n\n\t\tcalc: function ( t ) {\n\n\t\t\tvar t2 = t * t;\n\t\t\tvar t3 = t2 * t;\n\t\t\treturn c0 + c1 * t + c2 * t2 + c3 * t3;\n\n\t\t}\n\n\t};\n\n}\n\n//\n\nvar tmp = new Vector3();\nvar px$1 = new CubicPoly(), py = new CubicPoly(), pz = new CubicPoly();\n\nfunction CatmullRomCurve3( points, closed, curveType, tension ) {\n\n\tCurve.call( this );\n\n\tthis.type = 'CatmullRomCurve3';\n\n\tthis.points = points || [];\n\tthis.closed = closed || false;\n\tthis.curveType = curveType || 'centripetal';\n\tthis.tension = tension || 0.5;\n\n}\n\nCatmullRomCurve3.prototype = Object.create( Curve.prototype );\nCatmullRomCurve3.prototype.constructor = CatmullRomCurve3;\n\nCatmullRomCurve3.prototype.isCatmullRomCurve3 = true;\n\nCatmullRomCurve3.prototype.getPoint = function ( t, optionalTarget ) {\n\n\tvar point = optionalTarget || new Vector3();\n\n\tvar points = this.points;\n\tvar l = points.length;\n\n\tvar p = ( l - ( this.closed ? 0 : 1 ) ) * t;\n\tvar intPoint = Math.floor( p );\n\tvar weight = p - intPoint;\n\n\tif ( this.closed ) {\n\n\t\tintPoint += intPoint > 0 ? 0 : ( Math.floor( Math.abs( intPoint ) / l ) + 1 ) * l;\n\n\t} else if ( weight === 0 && intPoint === l - 1 ) {\n\n\t\tintPoint = l - 2;\n\t\tweight = 1;\n\n\t}\n\n\tvar p0, p1, p2, p3; // 4 points\n\n\tif ( this.closed || intPoint > 0 ) {\n\n\t\tp0 = points[ ( intPoint - 1 ) % l ];\n\n\t} else {\n\n\t\t// extrapolate first point\n\t\ttmp.subVectors( points[ 0 ], points[ 1 ] ).add( points[ 0 ] );\n\t\tp0 = tmp;\n\n\t}\n\n\tp1 = points[ intPoint % l ];\n\tp2 = points[ ( intPoint + 1 ) % l ];\n\n\tif ( this.closed || intPoint + 2 < l ) {\n\n\t\tp3 = points[ ( intPoint + 2 ) % l ];\n\n\t} else {\n\n\t\t// extrapolate last point\n\t\ttmp.subVectors( points[ l - 1 ], points[ l - 2 ] ).add( points[ l - 1 ] );\n\t\tp3 = tmp;\n\n\t}\n\n\tif ( this.curveType === 'centripetal' || this.curveType === 'chordal' ) {\n\n\t\t// init Centripetal / Chordal Catmull-Rom\n\t\tvar pow = this.curveType === 'chordal' ? 0.5 : 0.25;\n\t\tvar dt0 = Math.pow( p0.distanceToSquared( p1 ), pow );\n\t\tvar dt1 = Math.pow( p1.distanceToSquared( p2 ), pow );\n\t\tvar dt2 = Math.pow( p2.distanceToSquared( p3 ), pow );\n\n\t\t// safety check for repeated points\n\t\tif ( dt1 < 1e-4 ) dt1 = 1.0;\n\t\tif ( dt0 < 1e-4 ) dt0 = dt1;\n\t\tif ( dt2 < 1e-4 ) dt2 = dt1;\n\n\t\tpx$1.initNonuniformCatmullRom( p0.x, p1.x, p2.x, p3.x, dt0, dt1, dt2 );\n\t\tpy.initNonuniformCatmullRom( p0.y, p1.y, p2.y, p3.y, dt0, dt1, dt2 );\n\t\tpz.initNonuniformCatmullRom( p0.z, p1.z, p2.z, p3.z, dt0, dt1, dt2 );\n\n\t} else if ( this.curveType === 'catmullrom' ) {\n\n\t\tpx$1.initCatmullRom( p0.x, p1.x, p2.x, p3.x, this.tension );\n\t\tpy.initCatmullRom( p0.y, p1.y, p2.y, p3.y, this.tension );\n\t\tpz.initCatmullRom( p0.z, p1.z, p2.z, p3.z, this.tension );\n\n\t}\n\n\tpoint.set(\n\t\tpx$1.calc( weight ),\n\t\tpy.calc( weight ),\n\t\tpz.calc( weight )\n\t);\n\n\treturn point;\n\n};\n\nCatmullRomCurve3.prototype.copy = function ( source ) {\n\n\tCurve.prototype.copy.call( this, source );\n\n\tthis.points = [];\n\n\tfor ( var i = 0, l = source.points.length; i < l; i ++ ) {\n\n\t\tvar point = source.points[ i ];\n\n\t\tthis.points.push( point.clone() );\n\n\t}\n\n\tthis.closed = source.closed;\n\tthis.curveType = source.curveType;\n\tthis.tension = source.tension;\n\n\treturn this;\n\n};\n\nCatmullRomCurve3.prototype.toJSON = function () {\n\n\tvar data = Curve.prototype.toJSON.call( this );\n\n\tdata.points = [];\n\n\tfor ( var i = 0, l = this.points.length; i < l; i ++ ) {\n\n\t\tvar point = this.points[ i ];\n\t\tdata.points.push( point.toArray() );\n\n\t}\n\n\tdata.closed = this.closed;\n\tdata.curveType = this.curveType;\n\tdata.tension = this.tension;\n\n\treturn data;\n\n};\n\nCatmullRomCurve3.prototype.fromJSON = function ( json ) {\n\n\tCurve.prototype.fromJSON.call( this, json );\n\n\tthis.points = [];\n\n\tfor ( var i = 0, l = json.points.length; i < l; i ++ ) {\n\n\t\tvar point = json.points[ i ];\n\t\tthis.points.push( new Vector3().fromArray( point ) );\n\n\t}\n\n\tthis.closed = json.closed;\n\tthis.curveType = json.curveType;\n\tthis.tension = json.tension;\n\n\treturn this;\n\n};\n\n/**\n * @author zz85 / http://www.lab4games.net/zz85/blog\n *\n * Bezier Curves formulas obtained from\n * http://en.wikipedia.org/wiki/Bézier_curve\n */\n\nfunction CatmullRom( t, p0, p1, p2, p3 ) {\n\n\tvar v0 = ( p2 - p0 ) * 0.5;\n\tvar v1 = ( p3 - p1 ) * 0.5;\n\tvar t2 = t * t;\n\tvar t3 = t * t2;\n\treturn ( 2 * p1 - 2 * p2 + v0 + v1 ) * t3 + ( - 3 * p1 + 3 * p2 - 2 * v0 - v1 ) * t2 + v0 * t + p1;\n\n}\n\n//\n\nfunction QuadraticBezierP0( t, p ) {\n\n\tvar k = 1 - t;\n\treturn k * k * p;\n\n}\n\nfunction QuadraticBezierP1( t, p ) {\n\n\treturn 2 * ( 1 - t ) * t * p;\n\n}\n\nfunction QuadraticBezierP2( t, p ) {\n\n\treturn t * t * p;\n\n}\n\nfunction QuadraticBezier( t, p0, p1, p2 ) {\n\n\treturn QuadraticBezierP0( t, p0 ) + QuadraticBezierP1( t, p1 ) +\n\t\tQuadraticBezierP2( t, p2 );\n\n}\n\n//\n\nfunction CubicBezierP0( t, p ) {\n\n\tvar k = 1 - t;\n\treturn k * k * k * p;\n\n}\n\nfunction CubicBezierP1( t, p ) {\n\n\tvar k = 1 - t;\n\treturn 3 * k * k * t * p;\n\n}\n\nfunction CubicBezierP2( t, p ) {\n\n\treturn 3 * ( 1 - t ) * t * t * p;\n\n}\n\nfunction CubicBezierP3( t, p ) {\n\n\treturn t * t * t * p;\n\n}\n\nfunction CubicBezier( t, p0, p1, p2, p3 ) {\n\n\treturn CubicBezierP0( t, p0 ) + CubicBezierP1( t, p1 ) + CubicBezierP2( t, p2 ) +\n\t\tCubicBezierP3( t, p3 );\n\n}\n\nfunction CubicBezierCurve( v0, v1, v2, v3 ) {\n\n\tCurve.call( this );\n\n\tthis.type = 'CubicBezierCurve';\n\n\tthis.v0 = v0 || new Vector2();\n\tthis.v1 = v1 || new Vector2();\n\tthis.v2 = v2 || new Vector2();\n\tthis.v3 = v3 || new Vector2();\n\n}\n\nCubicBezierCurve.prototype = Object.create( Curve.prototype );\nCubicBezierCurve.prototype.constructor = CubicBezierCurve;\n\nCubicBezierCurve.prototype.isCubicBezierCurve = true;\n\nCubicBezierCurve.prototype.getPoint = function ( t, optionalTarget ) {\n\n\tvar point = optionalTarget || new Vector2();\n\n\tvar v0 = this.v0, v1 = this.v1, v2 = this.v2, v3 = this.v3;\n\n\tpoint.set(\n\t\tCubicBezier( t, v0.x, v1.x, v2.x, v3.x ),\n\t\tCubicBezier( t, v0.y, v1.y, v2.y, v3.y )\n\t);\n\n\treturn point;\n\n};\n\nCubicBezierCurve.prototype.copy = function ( source ) {\n\n\tCurve.prototype.copy.call( this, source );\n\n\tthis.v0.copy( source.v0 );\n\tthis.v1.copy( source.v1 );\n\tthis.v2.copy( source.v2 );\n\tthis.v3.copy( source.v3 );\n\n\treturn this;\n\n};\n\nCubicBezierCurve.prototype.toJSON = function () {\n\n\tvar data = Curve.prototype.toJSON.call( this );\n\n\tdata.v0 = this.v0.toArray();\n\tdata.v1 = this.v1.toArray();\n\tdata.v2 = this.v2.toArray();\n\tdata.v3 = this.v3.toArray();\n\n\treturn data;\n\n};\n\nCubicBezierCurve.prototype.fromJSON = function ( json ) {\n\n\tCurve.prototype.fromJSON.call( this, json );\n\n\tthis.v0.fromArray( json.v0 );\n\tthis.v1.fromArray( json.v1 );\n\tthis.v2.fromArray( json.v2 );\n\tthis.v3.fromArray( json.v3 );\n\n\treturn this;\n\n};\n\nfunction CubicBezierCurve3( v0, v1, v2, v3 ) {\n\n\tCurve.call( this );\n\n\tthis.type = 'CubicBezierCurve3';\n\n\tthis.v0 = v0 || new Vector3();\n\tthis.v1 = v1 || new Vector3();\n\tthis.v2 = v2 || new Vector3();\n\tthis.v3 = v3 || new Vector3();\n\n}\n\nCubicBezierCurve3.prototype = Object.create( Curve.prototype );\nCubicBezierCurve3.prototype.constructor = CubicBezierCurve3;\n\nCubicBezierCurve3.prototype.isCubicBezierCurve3 = true;\n\nCubicBezierCurve3.prototype.getPoint = function ( t, optionalTarget ) {\n\n\tvar point = optionalTarget || new Vector3();\n\n\tvar v0 = this.v0, v1 = this.v1, v2 = this.v2, v3 = this.v3;\n\n\tpoint.set(\n\t\tCubicBezier( t, v0.x, v1.x, v2.x, v3.x ),\n\t\tCubicBezier( t, v0.y, v1.y, v2.y, v3.y ),\n\t\tCubicBezier( t, v0.z, v1.z, v2.z, v3.z )\n\t);\n\n\treturn point;\n\n};\n\nCubicBezierCurve3.prototype.copy = function ( source ) {\n\n\tCurve.prototype.copy.call( this, source );\n\n\tthis.v0.copy( source.v0 );\n\tthis.v1.copy( source.v1 );\n\tthis.v2.copy( source.v2 );\n\tthis.v3.copy( source.v3 );\n\n\treturn this;\n\n};\n\nCubicBezierCurve3.prototype.toJSON = function () {\n\n\tvar data = Curve.prototype.toJSON.call( this );\n\n\tdata.v0 = this.v0.toArray();\n\tdata.v1 = this.v1.toArray();\n\tdata.v2 = this.v2.toArray();\n\tdata.v3 = this.v3.toArray();\n\n\treturn data;\n\n};\n\nCubicBezierCurve3.prototype.fromJSON = function ( json ) {\n\n\tCurve.prototype.fromJSON.call( this, json );\n\n\tthis.v0.fromArray( json.v0 );\n\tthis.v1.fromArray( json.v1 );\n\tthis.v2.fromArray( json.v2 );\n\tthis.v3.fromArray( json.v3 );\n\n\treturn this;\n\n};\n\nfunction LineCurve( v1, v2 ) {\n\n\tCurve.call( this );\n\n\tthis.type = 'LineCurve';\n\n\tthis.v1 = v1 || new Vector2();\n\tthis.v2 = v2 || new Vector2();\n\n}\n\nLineCurve.prototype = Object.create( Curve.prototype );\nLineCurve.prototype.constructor = LineCurve;\n\nLineCurve.prototype.isLineCurve = true;\n\nLineCurve.prototype.getPoint = function ( t, optionalTarget ) {\n\n\tvar point = optionalTarget || new Vector2();\n\n\tif ( t === 1 ) {\n\n\t\tpoint.copy( this.v2 );\n\n\t} else {\n\n\t\tpoint.copy( this.v2 ).sub( this.v1 );\n\t\tpoint.multiplyScalar( t ).add( this.v1 );\n\n\t}\n\n\treturn point;\n\n};\n\n// Line curve is linear, so we can overwrite default getPointAt\n\nLineCurve.prototype.getPointAt = function ( u, optionalTarget ) {\n\n\treturn this.getPoint( u, optionalTarget );\n\n};\n\nLineCurve.prototype.getTangent = function ( /* t */ ) {\n\n\tvar tangent = this.v2.clone().sub( this.v1 );\n\n\treturn tangent.normalize();\n\n};\n\nLineCurve.prototype.copy = function ( source ) {\n\n\tCurve.prototype.copy.call( this, source );\n\n\tthis.v1.copy( source.v1 );\n\tthis.v2.copy( source.v2 );\n\n\treturn this;\n\n};\n\nLineCurve.prototype.toJSON = function () {\n\n\tvar data = Curve.prototype.toJSON.call( this );\n\n\tdata.v1 = this.v1.toArray();\n\tdata.v2 = this.v2.toArray();\n\n\treturn data;\n\n};\n\nLineCurve.prototype.fromJSON = function ( json ) {\n\n\tCurve.prototype.fromJSON.call( this, json );\n\n\tthis.v1.fromArray( json.v1 );\n\tthis.v2.fromArray( json.v2 );\n\n\treturn this;\n\n};\n\nfunction LineCurve3( v1, v2 ) {\n\n\tCurve.call( this );\n\n\tthis.type = 'LineCurve3';\n\n\tthis.v1 = v1 || new Vector3();\n\tthis.v2 = v2 || new Vector3();\n\n}\n\nLineCurve3.prototype = Object.create( Curve.prototype );\nLineCurve3.prototype.constructor = LineCurve3;\n\nLineCurve3.prototype.isLineCurve3 = true;\n\nLineCurve3.prototype.getPoint = function ( t, optionalTarget ) {\n\n\tvar point = optionalTarget || new Vector3();\n\n\tif ( t === 1 ) {\n\n\t\tpoint.copy( this.v2 );\n\n\t} else {\n\n\t\tpoint.copy( this.v2 ).sub( this.v1 );\n\t\tpoint.multiplyScalar( t ).add( this.v1 );\n\n\t}\n\n\treturn point;\n\n};\n\n// Line curve is linear, so we can overwrite default getPointAt\n\nLineCurve3.prototype.getPointAt = function ( u, optionalTarget ) {\n\n\treturn this.getPoint( u, optionalTarget );\n\n};\n\nLineCurve3.prototype.copy = function ( source ) {\n\n\tCurve.prototype.copy.call( this, source );\n\n\tthis.v1.copy( source.v1 );\n\tthis.v2.copy( source.v2 );\n\n\treturn this;\n\n};\n\nLineCurve3.prototype.toJSON = function () {\n\n\tvar data = Curve.prototype.toJSON.call( this );\n\n\tdata.v1 = this.v1.toArray();\n\tdata.v2 = this.v2.toArray();\n\n\treturn data;\n\n};\n\nLineCurve3.prototype.fromJSON = function ( json ) {\n\n\tCurve.prototype.fromJSON.call( this, json );\n\n\tthis.v1.fromArray( json.v1 );\n\tthis.v2.fromArray( json.v2 );\n\n\treturn this;\n\n};\n\nfunction QuadraticBezierCurve( v0, v1, v2 ) {\n\n\tCurve.call( this );\n\n\tthis.type = 'QuadraticBezierCurve';\n\n\tthis.v0 = v0 || new Vector2();\n\tthis.v1 = v1 || new Vector2();\n\tthis.v2 = v2 || new Vector2();\n\n}\n\nQuadraticBezierCurve.prototype = Object.create( Curve.prototype );\nQuadraticBezierCurve.prototype.constructor = QuadraticBezierCurve;\n\nQuadraticBezierCurve.prototype.isQuadraticBezierCurve = true;\n\nQuadraticBezierCurve.prototype.getPoint = function ( t, optionalTarget ) {\n\n\tvar point = optionalTarget || new Vector2();\n\n\tvar v0 = this.v0, v1 = this.v1, v2 = this.v2;\n\n\tpoint.set(\n\t\tQuadraticBezier( t, v0.x, v1.x, v2.x ),\n\t\tQuadraticBezier( t, v0.y, v1.y, v2.y )\n\t);\n\n\treturn point;\n\n};\n\nQuadraticBezierCurve.prototype.copy = function ( source ) {\n\n\tCurve.prototype.copy.call( this, source );\n\n\tthis.v0.copy( source.v0 );\n\tthis.v1.copy( source.v1 );\n\tthis.v2.copy( source.v2 );\n\n\treturn this;\n\n};\n\nQuadraticBezierCurve.prototype.toJSON = function () {\n\n\tvar data = Curve.prototype.toJSON.call( this );\n\n\tdata.v0 = this.v0.toArray();\n\tdata.v1 = this.v1.toArray();\n\tdata.v2 = this.v2.toArray();\n\n\treturn data;\n\n};\n\nQuadraticBezierCurve.prototype.fromJSON = function ( json ) {\n\n\tCurve.prototype.fromJSON.call( this, json );\n\n\tthis.v0.fromArray( json.v0 );\n\tthis.v1.fromArray( json.v1 );\n\tthis.v2.fromArray( json.v2 );\n\n\treturn this;\n\n};\n\nfunction QuadraticBezierCurve3( v0, v1, v2 ) {\n\n\tCurve.call( this );\n\n\tthis.type = 'QuadraticBezierCurve3';\n\n\tthis.v0 = v0 || new Vector3();\n\tthis.v1 = v1 || new Vector3();\n\tthis.v2 = v2 || new Vector3();\n\n}\n\nQuadraticBezierCurve3.prototype = Object.create( Curve.prototype );\nQuadraticBezierCurve3.prototype.constructor = QuadraticBezierCurve3;\n\nQuadraticBezierCurve3.prototype.isQuadraticBezierCurve3 = true;\n\nQuadraticBezierCurve3.prototype.getPoint = function ( t, optionalTarget ) {\n\n\tvar point = optionalTarget || new Vector3();\n\n\tvar v0 = this.v0, v1 = this.v1, v2 = this.v2;\n\n\tpoint.set(\n\t\tQuadraticBezier( t, v0.x, v1.x, v2.x ),\n\t\tQuadraticBezier( t, v0.y, v1.y, v2.y ),\n\t\tQuadraticBezier( t, v0.z, v1.z, v2.z )\n\t);\n\n\treturn point;\n\n};\n\nQuadraticBezierCurve3.prototype.copy = function ( source ) {\n\n\tCurve.prototype.copy.call( this, source );\n\n\tthis.v0.copy( source.v0 );\n\tthis.v1.copy( source.v1 );\n\tthis.v2.copy( source.v2 );\n\n\treturn this;\n\n};\n\nQuadraticBezierCurve3.prototype.toJSON = function () {\n\n\tvar data = Curve.prototype.toJSON.call( this );\n\n\tdata.v0 = this.v0.toArray();\n\tdata.v1 = this.v1.toArray();\n\tdata.v2 = this.v2.toArray();\n\n\treturn data;\n\n};\n\nQuadraticBezierCurve3.prototype.fromJSON = function ( json ) {\n\n\tCurve.prototype.fromJSON.call( this, json );\n\n\tthis.v0.fromArray( json.v0 );\n\tthis.v1.fromArray( json.v1 );\n\tthis.v2.fromArray( json.v2 );\n\n\treturn this;\n\n};\n\nfunction SplineCurve( points /* array of Vector2 */ ) {\n\n\tCurve.call( this );\n\n\tthis.type = 'SplineCurve';\n\n\tthis.points = points || [];\n\n}\n\nSplineCurve.prototype = Object.create( Curve.prototype );\nSplineCurve.prototype.constructor = SplineCurve;\n\nSplineCurve.prototype.isSplineCurve = true;\n\nSplineCurve.prototype.getPoint = function ( t, optionalTarget ) {\n\n\tvar point = optionalTarget || new Vector2();\n\n\tvar points = this.points;\n\tvar p = ( points.length - 1 ) * t;\n\n\tvar intPoint = Math.floor( p );\n\tvar weight = p - intPoint;\n\n\tvar p0 = points[ intPoint === 0 ? intPoint : intPoint - 1 ];\n\tvar p1 = points[ intPoint ];\n\tvar p2 = points[ intPoint > points.length - 2 ? points.length - 1 : intPoint + 1 ];\n\tvar p3 = points[ intPoint > points.length - 3 ? points.length - 1 : intPoint + 2 ];\n\n\tpoint.set(\n\t\tCatmullRom( weight, p0.x, p1.x, p2.x, p3.x ),\n\t\tCatmullRom( weight, p0.y, p1.y, p2.y, p3.y )\n\t);\n\n\treturn point;\n\n};\n\nSplineCurve.prototype.copy = function ( source ) {\n\n\tCurve.prototype.copy.call( this, source );\n\n\tthis.points = [];\n\n\tfor ( var i = 0, l = source.points.length; i < l; i ++ ) {\n\n\t\tvar point = source.points[ i ];\n\n\t\tthis.points.push( point.clone() );\n\n\t}\n\n\treturn this;\n\n};\n\nSplineCurve.prototype.toJSON = function () {\n\n\tvar data = Curve.prototype.toJSON.call( this );\n\n\tdata.points = [];\n\n\tfor ( var i = 0, l = this.points.length; i < l; i ++ ) {\n\n\t\tvar point = this.points[ i ];\n\t\tdata.points.push( point.toArray() );\n\n\t}\n\n\treturn data;\n\n};\n\nSplineCurve.prototype.fromJSON = function ( json ) {\n\n\tCurve.prototype.fromJSON.call( this, json );\n\n\tthis.points = [];\n\n\tfor ( var i = 0, l = json.points.length; i < l; i ++ ) {\n\n\t\tvar point = json.points[ i ];\n\t\tthis.points.push( new Vector2().fromArray( point ) );\n\n\t}\n\n\treturn this;\n\n};\n\n\n\nvar Curves = /*#__PURE__*/Object.freeze({\n\t__proto__: null,\n\tArcCurve: ArcCurve,\n\tCatmullRomCurve3: CatmullRomCurve3,\n\tCubicBezierCurve: CubicBezierCurve,\n\tCubicBezierCurve3: CubicBezierCurve3,\n\tEllipseCurve: EllipseCurve,\n\tLineCurve: LineCurve,\n\tLineCurve3: LineCurve3,\n\tQuadraticBezierCurve: QuadraticBezierCurve,\n\tQuadraticBezierCurve3: QuadraticBezierCurve3,\n\tSplineCurve: SplineCurve\n});\n\n/**\n * @author zz85 / http://www.lab4games.net/zz85/blog\n *\n **/\n\n/**************************************************************\n *\tCurved Path - a curve path is simply a array of connected\n *  curves, but retains the api of a curve\n **************************************************************/\n\nfunction CurvePath() {\n\n\tCurve.call( this );\n\n\tthis.type = 'CurvePath';\n\n\tthis.curves = [];\n\tthis.autoClose = false; // Automatically closes the path\n\n}\n\nCurvePath.prototype = Object.assign( Object.create( Curve.prototype ), {\n\n\tconstructor: CurvePath,\n\n\tadd: function ( curve ) {\n\n\t\tthis.curves.push( curve );\n\n\t},\n\n\tclosePath: function () {\n\n\t\t// Add a line curve if start and end of lines are not connected\n\t\tvar startPoint = this.curves[ 0 ].getPoint( 0 );\n\t\tvar endPoint = this.curves[ this.curves.length - 1 ].getPoint( 1 );\n\n\t\tif ( ! startPoint.equals( endPoint ) ) {\n\n\t\t\tthis.curves.push( new LineCurve( endPoint, startPoint ) );\n\n\t\t}\n\n\t},\n\n\t// To get accurate point with reference to\n\t// entire path distance at time t,\n\t// following has to be done:\n\n\t// 1. Length of each sub path have to be known\n\t// 2. Locate and identify type of curve\n\t// 3. Get t for the curve\n\t// 4. Return curve.getPointAt(t')\n\n\tgetPoint: function ( t ) {\n\n\t\tvar d = t * this.getLength();\n\t\tvar curveLengths = this.getCurveLengths();\n\t\tvar i = 0;\n\n\t\t// To think about boundaries points.\n\n\t\twhile ( i < curveLengths.length ) {\n\n\t\t\tif ( curveLengths[ i ] >= d ) {\n\n\t\t\t\tvar diff = curveLengths[ i ] - d;\n\t\t\t\tvar curve = this.curves[ i ];\n\n\t\t\t\tvar segmentLength = curve.getLength();\n\t\t\t\tvar u = segmentLength === 0 ? 0 : 1 - diff / segmentLength;\n\n\t\t\t\treturn curve.getPointAt( u );\n\n\t\t\t}\n\n\t\t\ti ++;\n\n\t\t}\n\n\t\treturn null;\n\n\t\t// loop where sum != 0, sum > d , sum+1 <d\n\n\t},\n\n\t// We cannot use the default THREE.Curve getPoint() with getLength() because in\n\t// THREE.Curve, getLength() depends on getPoint() but in THREE.CurvePath\n\t// getPoint() depends on getLength\n\n\tgetLength: function () {\n\n\t\tvar lens = this.getCurveLengths();\n\t\treturn lens[ lens.length - 1 ];\n\n\t},\n\n\t// cacheLengths must be recalculated.\n\tupdateArcLengths: function () {\n\n\t\tthis.needsUpdate = true;\n\t\tthis.cacheLengths = null;\n\t\tthis.getCurveLengths();\n\n\t},\n\n\t// Compute lengths and cache them\n\t// We cannot overwrite getLengths() because UtoT mapping uses it.\n\n\tgetCurveLengths: function () {\n\n\t\t// We use cache values if curves and cache array are same length\n\n\t\tif ( this.cacheLengths && this.cacheLengths.length === this.curves.length ) {\n\n\t\t\treturn this.cacheLengths;\n\n\t\t}\n\n\t\t// Get length of sub-curve\n\t\t// Push sums into cached array\n\n\t\tvar lengths = [], sums = 0;\n\n\t\tfor ( var i = 0, l = this.curves.length; i < l; i ++ ) {\n\n\t\t\tsums += this.curves[ i ].getLength();\n\t\t\tlengths.push( sums );\n\n\t\t}\n\n\t\tthis.cacheLengths = lengths;\n\n\t\treturn lengths;\n\n\t},\n\n\tgetSpacedPoints: function ( divisions ) {\n\n\t\tif ( divisions === undefined ) divisions = 40;\n\n\t\tvar points = [];\n\n\t\tfor ( var i = 0; i <= divisions; i ++ ) {\n\n\t\t\tpoints.push( this.getPoint( i / divisions ) );\n\n\t\t}\n\n\t\tif ( this.autoClose ) {\n\n\t\t\tpoints.push( points[ 0 ] );\n\n\t\t}\n\n\t\treturn points;\n\n\t},\n\n\tgetPoints: function ( divisions ) {\n\n\t\tdivisions = divisions || 12;\n\n\t\tvar points = [], last;\n\n\t\tfor ( var i = 0, curves = this.curves; i < curves.length; i ++ ) {\n\n\t\t\tvar curve = curves[ i ];\n\t\t\tvar resolution = ( curve && curve.isEllipseCurve ) ? divisions * 2\n\t\t\t\t: ( curve && ( curve.isLineCurve || curve.isLineCurve3 ) ) ? 1\n\t\t\t\t\t: ( curve && curve.isSplineCurve ) ? divisions * curve.points.length\n\t\t\t\t\t\t: divisions;\n\n\t\t\tvar pts = curve.getPoints( resolution );\n\n\t\t\tfor ( var j = 0; j < pts.length; j ++ ) {\n\n\t\t\t\tvar point = pts[ j ];\n\n\t\t\t\tif ( last && last.equals( point ) ) continue; // ensures no consecutive points are duplicates\n\n\t\t\t\tpoints.push( point );\n\t\t\t\tlast = point;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( this.autoClose && points.length > 1 && ! points[ points.length - 1 ].equals( points[ 0 ] ) ) {\n\n\t\t\tpoints.push( points[ 0 ] );\n\n\t\t}\n\n\t\treturn points;\n\n\t},\n\n\tcopy: function ( source ) {\n\n\t\tCurve.prototype.copy.call( this, source );\n\n\t\tthis.curves = [];\n\n\t\tfor ( var i = 0, l = source.curves.length; i < l; i ++ ) {\n\n\t\t\tvar curve = source.curves[ i ];\n\n\t\t\tthis.curves.push( curve.clone() );\n\n\t\t}\n\n\t\tthis.autoClose = source.autoClose;\n\n\t\treturn this;\n\n\t},\n\n\ttoJSON: function () {\n\n\t\tvar data = Curve.prototype.toJSON.call( this );\n\n\t\tdata.autoClose = this.autoClose;\n\t\tdata.curves = [];\n\n\t\tfor ( var i = 0, l = this.curves.length; i < l; i ++ ) {\n\n\t\t\tvar curve = this.curves[ i ];\n\t\t\tdata.curves.push( curve.toJSON() );\n\n\t\t}\n\n\t\treturn data;\n\n\t},\n\n\tfromJSON: function ( json ) {\n\n\t\tCurve.prototype.fromJSON.call( this, json );\n\n\t\tthis.autoClose = json.autoClose;\n\t\tthis.curves = [];\n\n\t\tfor ( var i = 0, l = json.curves.length; i < l; i ++ ) {\n\n\t\t\tvar curve = json.curves[ i ];\n\t\t\tthis.curves.push( new Curves[ curve.type ]().fromJSON( curve ) );\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n} );\n\n/**\n * @author zz85 / http://www.lab4games.net/zz85/blog\n * Creates free form 2d path using series of points, lines or curves.\n **/\n\nfunction Path( points ) {\n\n\tCurvePath.call( this );\n\n\tthis.type = 'Path';\n\n\tthis.currentPoint = new Vector2();\n\n\tif ( points ) {\n\n\t\tthis.setFromPoints( points );\n\n\t}\n\n}\n\nPath.prototype = Object.assign( Object.create( CurvePath.prototype ), {\n\n\tconstructor: Path,\n\n\tsetFromPoints: function ( points ) {\n\n\t\tthis.moveTo( points[ 0 ].x, points[ 0 ].y );\n\n\t\tfor ( var i = 1, l = points.length; i < l; i ++ ) {\n\n\t\t\tthis.lineTo( points[ i ].x, points[ i ].y );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tmoveTo: function ( x, y ) {\n\n\t\tthis.currentPoint.set( x, y ); // TODO consider referencing vectors instead of copying?\n\n\t\treturn this;\n\n\t},\n\n\tlineTo: function ( x, y ) {\n\n\t\tvar curve = new LineCurve( this.currentPoint.clone(), new Vector2( x, y ) );\n\t\tthis.curves.push( curve );\n\n\t\tthis.currentPoint.set( x, y );\n\n\t\treturn this;\n\n\t},\n\n\tquadraticCurveTo: function ( aCPx, aCPy, aX, aY ) {\n\n\t\tvar curve = new QuadraticBezierCurve(\n\t\t\tthis.currentPoint.clone(),\n\t\t\tnew Vector2( aCPx, aCPy ),\n\t\t\tnew Vector2( aX, aY )\n\t\t);\n\n\t\tthis.curves.push( curve );\n\n\t\tthis.currentPoint.set( aX, aY );\n\n\t\treturn this;\n\n\t},\n\n\tbezierCurveTo: function ( aCP1x, aCP1y, aCP2x, aCP2y, aX, aY ) {\n\n\t\tvar curve = new CubicBezierCurve(\n\t\t\tthis.currentPoint.clone(),\n\t\t\tnew Vector2( aCP1x, aCP1y ),\n\t\t\tnew Vector2( aCP2x, aCP2y ),\n\t\t\tnew Vector2( aX, aY )\n\t\t);\n\n\t\tthis.curves.push( curve );\n\n\t\tthis.currentPoint.set( aX, aY );\n\n\t\treturn this;\n\n\t},\n\n\tsplineThru: function ( pts /*Array of Vector*/ ) {\n\n\t\tvar npts = [ this.currentPoint.clone() ].concat( pts );\n\n\t\tvar curve = new SplineCurve( npts );\n\t\tthis.curves.push( curve );\n\n\t\tthis.currentPoint.copy( pts[ pts.length - 1 ] );\n\n\t\treturn this;\n\n\t},\n\n\tarc: function ( aX, aY, aRadius, aStartAngle, aEndAngle, aClockwise ) {\n\n\t\tvar x0 = this.currentPoint.x;\n\t\tvar y0 = this.currentPoint.y;\n\n\t\tthis.absarc( aX + x0, aY + y0, aRadius,\n\t\t\taStartAngle, aEndAngle, aClockwise );\n\n\t\treturn this;\n\n\t},\n\n\tabsarc: function ( aX, aY, aRadius, aStartAngle, aEndAngle, aClockwise ) {\n\n\t\tthis.absellipse( aX, aY, aRadius, aRadius, aStartAngle, aEndAngle, aClockwise );\n\n\t\treturn this;\n\n\t},\n\n\tellipse: function ( aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation ) {\n\n\t\tvar x0 = this.currentPoint.x;\n\t\tvar y0 = this.currentPoint.y;\n\n\t\tthis.absellipse( aX + x0, aY + y0, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation );\n\n\t\treturn this;\n\n\t},\n\n\tabsellipse: function ( aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation ) {\n\n\t\tvar curve = new EllipseCurve( aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation );\n\n\t\tif ( this.curves.length > 0 ) {\n\n\t\t\t// if a previous curve is present, attempt to join\n\t\t\tvar firstPoint = curve.getPoint( 0 );\n\n\t\t\tif ( ! firstPoint.equals( this.currentPoint ) ) {\n\n\t\t\t\tthis.lineTo( firstPoint.x, firstPoint.y );\n\n\t\t\t}\n\n\t\t}\n\n\t\tthis.curves.push( curve );\n\n\t\tvar lastPoint = curve.getPoint( 1 );\n\t\tthis.currentPoint.copy( lastPoint );\n\n\t\treturn this;\n\n\t},\n\n\tcopy: function ( source ) {\n\n\t\tCurvePath.prototype.copy.call( this, source );\n\n\t\tthis.currentPoint.copy( source.currentPoint );\n\n\t\treturn this;\n\n\t},\n\n\ttoJSON: function () {\n\n\t\tvar data = CurvePath.prototype.toJSON.call( this );\n\n\t\tdata.currentPoint = this.currentPoint.toArray();\n\n\t\treturn data;\n\n\t},\n\n\tfromJSON: function ( json ) {\n\n\t\tCurvePath.prototype.fromJSON.call( this, json );\n\n\t\tthis.currentPoint.fromArray( json.currentPoint );\n\n\t\treturn this;\n\n\t}\n\n} );\n\n/**\n * @author zz85 / http://www.lab4games.net/zz85/blog\n * Defines a 2d shape plane using paths.\n **/\n\n// STEP 1 Create a path.\n// STEP 2 Turn path into shape.\n// STEP 3 ExtrudeGeometry takes in Shape/Shapes\n// STEP 3a - Extract points from each shape, turn to vertices\n// STEP 3b - Triangulate each shape, add faces.\n\nfunction Shape( points ) {\n\n\tPath.call( this, points );\n\n\tthis.uuid = MathUtils.generateUUID();\n\n\tthis.type = 'Shape';\n\n\tthis.holes = [];\n\n}\n\nShape.prototype = Object.assign( Object.create( Path.prototype ), {\n\n\tconstructor: Shape,\n\n\tgetPointsHoles: function ( divisions ) {\n\n\t\tvar holesPts = [];\n\n\t\tfor ( var i = 0, l = this.holes.length; i < l; i ++ ) {\n\n\t\t\tholesPts[ i ] = this.holes[ i ].getPoints( divisions );\n\n\t\t}\n\n\t\treturn holesPts;\n\n\t},\n\n\t// get points of shape and holes (keypoints based on segments parameter)\n\n\textractPoints: function ( divisions ) {\n\n\t\treturn {\n\n\t\t\tshape: this.getPoints( divisions ),\n\t\t\tholes: this.getPointsHoles( divisions )\n\n\t\t};\n\n\t},\n\n\tcopy: function ( source ) {\n\n\t\tPath.prototype.copy.call( this, source );\n\n\t\tthis.holes = [];\n\n\t\tfor ( var i = 0, l = source.holes.length; i < l; i ++ ) {\n\n\t\t\tvar hole = source.holes[ i ];\n\n\t\t\tthis.holes.push( hole.clone() );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\ttoJSON: function () {\n\n\t\tvar data = Path.prototype.toJSON.call( this );\n\n\t\tdata.uuid = this.uuid;\n\t\tdata.holes = [];\n\n\t\tfor ( var i = 0, l = this.holes.length; i < l; i ++ ) {\n\n\t\t\tvar hole = this.holes[ i ];\n\t\t\tdata.holes.push( hole.toJSON() );\n\n\t\t}\n\n\t\treturn data;\n\n\t},\n\n\tfromJSON: function ( json ) {\n\n\t\tPath.prototype.fromJSON.call( this, json );\n\n\t\tthis.uuid = json.uuid;\n\t\tthis.holes = [];\n\n\t\tfor ( var i = 0, l = json.holes.length; i < l; i ++ ) {\n\n\t\t\tvar hole = json.holes[ i ];\n\t\t\tthis.holes.push( new Path().fromJSON( hole ) );\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n */\n\nfunction Light( color, intensity ) {\n\n\tObject3D.call( this );\n\n\tthis.type = 'Light';\n\n\tthis.color = new Color( color );\n\tthis.intensity = intensity !== undefined ? intensity : 1;\n\n\tthis.receiveShadow = undefined;\n\n}\n\nLight.prototype = Object.assign( Object.create( Object3D.prototype ), {\n\n\tconstructor: Light,\n\n\tisLight: true,\n\n\tcopy: function ( source ) {\n\n\t\tObject3D.prototype.copy.call( this, source );\n\n\t\tthis.color.copy( source.color );\n\t\tthis.intensity = source.intensity;\n\n\t\treturn this;\n\n\t},\n\n\ttoJSON: function ( meta ) {\n\n\t\tvar data = Object3D.prototype.toJSON.call( this, meta );\n\n\t\tdata.object.color = this.color.getHex();\n\t\tdata.object.intensity = this.intensity;\n\n\t\tif ( this.groundColor !== undefined ) data.object.groundColor = this.groundColor.getHex();\n\n\t\tif ( this.distance !== undefined ) data.object.distance = this.distance;\n\t\tif ( this.angle !== undefined ) data.object.angle = this.angle;\n\t\tif ( this.decay !== undefined ) data.object.decay = this.decay;\n\t\tif ( this.penumbra !== undefined ) data.object.penumbra = this.penumbra;\n\n\t\tif ( this.shadow !== undefined ) data.object.shadow = this.shadow.toJSON();\n\n\t\treturn data;\n\n\t}\n\n} );\n\n/**\n * @author alteredq / http://alteredqualia.com/\n */\n\nfunction HemisphereLight( skyColor, groundColor, intensity ) {\n\n\tLight.call( this, skyColor, intensity );\n\n\tthis.type = 'HemisphereLight';\n\n\tthis.castShadow = undefined;\n\n\tthis.position.copy( Object3D.DefaultUp );\n\tthis.updateMatrix();\n\n\tthis.groundColor = new Color( groundColor );\n\n}\n\nHemisphereLight.prototype = Object.assign( Object.create( Light.prototype ), {\n\n\tconstructor: HemisphereLight,\n\n\tisHemisphereLight: true,\n\n\tcopy: function ( source ) {\n\n\t\tLight.prototype.copy.call( this, source );\n\n\t\tthis.groundColor.copy( source.groundColor );\n\n\t\treturn this;\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction LightShadow( camera ) {\n\n\tthis.camera = camera;\n\n\tthis.bias = 0;\n\tthis.radius = 1;\n\n\tthis.mapSize = new Vector2( 512, 512 );\n\n\tthis.map = null;\n\tthis.mapPass = null;\n\tthis.matrix = new Matrix4();\n\n\tthis._frustum = new Frustum();\n\tthis._frameExtents = new Vector2( 1, 1 );\n\n\tthis._viewportCount = 1;\n\n\tthis._viewports = [\n\n\t\tnew Vector4( 0, 0, 1, 1 )\n\n\t];\n\n}\n\nObject.assign( LightShadow.prototype, {\n\n\t_projScreenMatrix: new Matrix4(),\n\n\t_lightPositionWorld: new Vector3(),\n\n\t_lookTarget: new Vector3(),\n\n\tgetViewportCount: function () {\n\n\t\treturn this._viewportCount;\n\n\t},\n\n\tgetFrustum: function () {\n\n\t\treturn this._frustum;\n\n\t},\n\n\tupdateMatrices: function ( light ) {\n\n\t\tvar shadowCamera = this.camera,\n\t\t\tshadowMatrix = this.matrix,\n\t\t\tprojScreenMatrix = this._projScreenMatrix,\n\t\t\tlookTarget = this._lookTarget,\n\t\t\tlightPositionWorld = this._lightPositionWorld;\n\n\t\tlightPositionWorld.setFromMatrixPosition( light.matrixWorld );\n\t\tshadowCamera.position.copy( lightPositionWorld );\n\n\t\tlookTarget.setFromMatrixPosition( light.target.matrixWorld );\n\t\tshadowCamera.lookAt( lookTarget );\n\t\tshadowCamera.updateMatrixWorld();\n\n\t\tprojScreenMatrix.multiplyMatrices( shadowCamera.projectionMatrix, shadowCamera.matrixWorldInverse );\n\t\tthis._frustum.setFromProjectionMatrix( projScreenMatrix );\n\n\t\tshadowMatrix.set(\n\t\t\t0.5, 0.0, 0.0, 0.5,\n\t\t\t0.0, 0.5, 0.0, 0.5,\n\t\t\t0.0, 0.0, 0.5, 0.5,\n\t\t\t0.0, 0.0, 0.0, 1.0\n\t\t);\n\n\t\tshadowMatrix.multiply( shadowCamera.projectionMatrix );\n\t\tshadowMatrix.multiply( shadowCamera.matrixWorldInverse );\n\n\t},\n\n\tgetViewport: function ( viewportIndex ) {\n\n\t\treturn this._viewports[ viewportIndex ];\n\n\t},\n\n\tgetFrameExtents: function () {\n\n\t\treturn this._frameExtents;\n\n\t},\n\n\tcopy: function ( source ) {\n\n\t\tthis.camera = source.camera.clone();\n\n\t\tthis.bias = source.bias;\n\t\tthis.radius = source.radius;\n\n\t\tthis.mapSize.copy( source.mapSize );\n\n\t\treturn this;\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor().copy( this );\n\n\t},\n\n\ttoJSON: function () {\n\n\t\tvar object = {};\n\n\t\tif ( this.bias !== 0 ) object.bias = this.bias;\n\t\tif ( this.radius !== 1 ) object.radius = this.radius;\n\t\tif ( this.mapSize.x !== 512 || this.mapSize.y !== 512 ) object.mapSize = this.mapSize.toArray();\n\n\t\tobject.camera = this.camera.toJSON( false ).object;\n\t\tdelete object.camera.matrix;\n\n\t\treturn object;\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction SpotLightShadow() {\n\n\tLightShadow.call( this, new PerspectiveCamera( 50, 1, 0.5, 500 ) );\n\n}\n\nSpotLightShadow.prototype = Object.assign( Object.create( LightShadow.prototype ), {\n\n\tconstructor: SpotLightShadow,\n\n\tisSpotLightShadow: true,\n\n\tupdateMatrices: function ( light ) {\n\n\t\tvar camera = this.camera;\n\n\t\tvar fov = MathUtils.RAD2DEG * 2 * light.angle;\n\t\tvar aspect = this.mapSize.width / this.mapSize.height;\n\t\tvar far = light.distance || camera.far;\n\n\t\tif ( fov !== camera.fov || aspect !== camera.aspect || far !== camera.far ) {\n\n\t\t\tcamera.fov = fov;\n\t\t\tcamera.aspect = aspect;\n\t\t\tcamera.far = far;\n\t\t\tcamera.updateProjectionMatrix();\n\n\t\t}\n\n\t\tLightShadow.prototype.updateMatrices.call( this, light );\n\n\t}\n\n} );\n\n/**\n * @author alteredq / http://alteredqualia.com/\n */\n\nfunction SpotLight( color, intensity, distance, angle, penumbra, decay ) {\n\n\tLight.call( this, color, intensity );\n\n\tthis.type = 'SpotLight';\n\n\tthis.position.copy( Object3D.DefaultUp );\n\tthis.updateMatrix();\n\n\tthis.target = new Object3D();\n\n\tObject.defineProperty( this, 'power', {\n\t\tget: function () {\n\n\t\t\t// intensity = power per solid angle.\n\t\t\t// ref: equation (17) from https://seblagarde.files.wordpress.com/2015/07/course_notes_moving_frostbite_to_pbr_v32.pdf\n\t\t\treturn this.intensity * Math.PI;\n\n\t\t},\n\t\tset: function ( power ) {\n\n\t\t\t// intensity = power per solid angle.\n\t\t\t// ref: equation (17) from https://seblagarde.files.wordpress.com/2015/07/course_notes_moving_frostbite_to_pbr_v32.pdf\n\t\t\tthis.intensity = power / Math.PI;\n\n\t\t}\n\t} );\n\n\tthis.distance = ( distance !== undefined ) ? distance : 0;\n\tthis.angle = ( angle !== undefined ) ? angle : Math.PI / 3;\n\tthis.penumbra = ( penumbra !== undefined ) ? penumbra : 0;\n\tthis.decay = ( decay !== undefined ) ? decay : 1;\t// for physically correct lights, should be 2.\n\n\tthis.shadow = new SpotLightShadow();\n\n}\n\nSpotLight.prototype = Object.assign( Object.create( Light.prototype ), {\n\n\tconstructor: SpotLight,\n\n\tisSpotLight: true,\n\n\tcopy: function ( source ) {\n\n\t\tLight.prototype.copy.call( this, source );\n\n\t\tthis.distance = source.distance;\n\t\tthis.angle = source.angle;\n\t\tthis.penumbra = source.penumbra;\n\t\tthis.decay = source.decay;\n\n\t\tthis.target = source.target.clone();\n\n\t\tthis.shadow = source.shadow.clone();\n\n\t\treturn this;\n\n\t}\n\n} );\n\nfunction PointLightShadow() {\n\n\tLightShadow.call( this, new PerspectiveCamera( 90, 1, 0.5, 500 ) );\n\n\tthis._frameExtents = new Vector2( 4, 2 );\n\n\tthis._viewportCount = 6;\n\n\tthis._viewports = [\n\t\t// These viewports map a cube-map onto a 2D texture with the\n\t\t// following orientation:\n\t\t//\n\t\t//  xzXZ\n\t\t//   y Y\n\t\t//\n\t\t// X - Positive x direction\n\t\t// x - Negative x direction\n\t\t// Y - Positive y direction\n\t\t// y - Negative y direction\n\t\t// Z - Positive z direction\n\t\t// z - Negative z direction\n\n\t\t// positive X\n\t\tnew Vector4( 2, 1, 1, 1 ),\n\t\t// negative X\n\t\tnew Vector4( 0, 1, 1, 1 ),\n\t\t// positive Z\n\t\tnew Vector4( 3, 1, 1, 1 ),\n\t\t// negative Z\n\t\tnew Vector4( 1, 1, 1, 1 ),\n\t\t// positive Y\n\t\tnew Vector4( 3, 0, 1, 1 ),\n\t\t// negative Y\n\t\tnew Vector4( 1, 0, 1, 1 )\n\t];\n\n\tthis._cubeDirections = [\n\t\tnew Vector3( 1, 0, 0 ), new Vector3( - 1, 0, 0 ), new Vector3( 0, 0, 1 ),\n\t\tnew Vector3( 0, 0, - 1 ), new Vector3( 0, 1, 0 ), new Vector3( 0, - 1, 0 )\n\t];\n\n\tthis._cubeUps = [\n\t\tnew Vector3( 0, 1, 0 ), new Vector3( 0, 1, 0 ), new Vector3( 0, 1, 0 ),\n\t\tnew Vector3( 0, 1, 0 ), new Vector3( 0, 0, 1 ),\tnew Vector3( 0, 0, - 1 )\n\t];\n\n}\n\nPointLightShadow.prototype = Object.assign( Object.create( LightShadow.prototype ), {\n\n\tconstructor: PointLightShadow,\n\n\tisPointLightShadow: true,\n\n\tupdateMatrices: function ( light, viewportIndex ) {\n\n\t\tif ( viewportIndex === undefined ) viewportIndex = 0;\n\n\t\tvar camera = this.camera,\n\t\t\tshadowMatrix = this.matrix,\n\t\t\tlightPositionWorld = this._lightPositionWorld,\n\t\t\tlookTarget = this._lookTarget,\n\t\t\tprojScreenMatrix = this._projScreenMatrix;\n\n\t\tlightPositionWorld.setFromMatrixPosition( light.matrixWorld );\n\t\tcamera.position.copy( lightPositionWorld );\n\n\t\tlookTarget.copy( camera.position );\n\t\tlookTarget.add( this._cubeDirections[ viewportIndex ] );\n\t\tcamera.up.copy( this._cubeUps[ viewportIndex ] );\n\t\tcamera.lookAt( lookTarget );\n\t\tcamera.updateMatrixWorld();\n\n\t\tshadowMatrix.makeTranslation( - lightPositionWorld.x, - lightPositionWorld.y, - lightPositionWorld.z );\n\n\t\tprojScreenMatrix.multiplyMatrices( camera.projectionMatrix, camera.matrixWorldInverse );\n\t\tthis._frustum.setFromProjectionMatrix( projScreenMatrix );\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\n\nfunction PointLight( color, intensity, distance, decay ) {\n\n\tLight.call( this, color, intensity );\n\n\tthis.type = 'PointLight';\n\n\tObject.defineProperty( this, 'power', {\n\t\tget: function () {\n\n\t\t\t// intensity = power per solid angle.\n\t\t\t// ref: equation (15) from https://seblagarde.files.wordpress.com/2015/07/course_notes_moving_frostbite_to_pbr_v32.pdf\n\t\t\treturn this.intensity * 4 * Math.PI;\n\n\t\t},\n\t\tset: function ( power ) {\n\n\t\t\t// intensity = power per solid angle.\n\t\t\t// ref: equation (15) from https://seblagarde.files.wordpress.com/2015/07/course_notes_moving_frostbite_to_pbr_v32.pdf\n\t\t\tthis.intensity = power / ( 4 * Math.PI );\n\n\t\t}\n\t} );\n\n\tthis.distance = ( distance !== undefined ) ? distance : 0;\n\tthis.decay = ( decay !== undefined ) ? decay : 1;\t// for physically correct lights, should be 2.\n\n\tthis.shadow = new PointLightShadow();\n\n}\n\nPointLight.prototype = Object.assign( Object.create( Light.prototype ), {\n\n\tconstructor: PointLight,\n\n\tisPointLight: true,\n\n\tcopy: function ( source ) {\n\n\t\tLight.prototype.copy.call( this, source );\n\n\t\tthis.distance = source.distance;\n\t\tthis.decay = source.decay;\n\n\t\tthis.shadow = source.shadow.clone();\n\n\t\treturn this;\n\n\t}\n\n} );\n\n/**\n * @author alteredq / http://alteredqualia.com/\n * @author arose / http://github.com/arose\n */\n\nfunction OrthographicCamera( left, right, top, bottom, near, far ) {\n\n\tCamera.call( this );\n\n\tthis.type = 'OrthographicCamera';\n\n\tthis.zoom = 1;\n\tthis.view = null;\n\n\tthis.left = ( left !== undefined ) ? left : - 1;\n\tthis.right = ( right !== undefined ) ? right : 1;\n\tthis.top = ( top !== undefined ) ? top : 1;\n\tthis.bottom = ( bottom !== undefined ) ? bottom : - 1;\n\n\tthis.near = ( near !== undefined ) ? near : 0.1;\n\tthis.far = ( far !== undefined ) ? far : 2000;\n\n\tthis.updateProjectionMatrix();\n\n}\n\nOrthographicCamera.prototype = Object.assign( Object.create( Camera.prototype ), {\n\n\tconstructor: OrthographicCamera,\n\n\tisOrthographicCamera: true,\n\n\tcopy: function ( source, recursive ) {\n\n\t\tCamera.prototype.copy.call( this, source, recursive );\n\n\t\tthis.left = source.left;\n\t\tthis.right = source.right;\n\t\tthis.top = source.top;\n\t\tthis.bottom = source.bottom;\n\t\tthis.near = source.near;\n\t\tthis.far = source.far;\n\n\t\tthis.zoom = source.zoom;\n\t\tthis.view = source.view === null ? null : Object.assign( {}, source.view );\n\n\t\treturn this;\n\n\t},\n\n\tsetViewOffset: function ( fullWidth, fullHeight, x, y, width, height ) {\n\n\t\tif ( this.view === null ) {\n\n\t\t\tthis.view = {\n\t\t\t\tenabled: true,\n\t\t\t\tfullWidth: 1,\n\t\t\t\tfullHeight: 1,\n\t\t\t\toffsetX: 0,\n\t\t\t\toffsetY: 0,\n\t\t\t\twidth: 1,\n\t\t\t\theight: 1\n\t\t\t};\n\n\t\t}\n\n\t\tthis.view.enabled = true;\n\t\tthis.view.fullWidth = fullWidth;\n\t\tthis.view.fullHeight = fullHeight;\n\t\tthis.view.offsetX = x;\n\t\tthis.view.offsetY = y;\n\t\tthis.view.width = width;\n\t\tthis.view.height = height;\n\n\t\tthis.updateProjectionMatrix();\n\n\t},\n\n\tclearViewOffset: function () {\n\n\t\tif ( this.view !== null ) {\n\n\t\t\tthis.view.enabled = false;\n\n\t\t}\n\n\t\tthis.updateProjectionMatrix();\n\n\t},\n\n\tupdateProjectionMatrix: function () {\n\n\t\tvar dx = ( this.right - this.left ) / ( 2 * this.zoom );\n\t\tvar dy = ( this.top - this.bottom ) / ( 2 * this.zoom );\n\t\tvar cx = ( this.right + this.left ) / 2;\n\t\tvar cy = ( this.top + this.bottom ) / 2;\n\n\t\tvar left = cx - dx;\n\t\tvar right = cx + dx;\n\t\tvar top = cy + dy;\n\t\tvar bottom = cy - dy;\n\n\t\tif ( this.view !== null && this.view.enabled ) {\n\n\t\t\tvar scaleW = ( this.right - this.left ) / this.view.fullWidth / this.zoom;\n\t\t\tvar scaleH = ( this.top - this.bottom ) / this.view.fullHeight / this.zoom;\n\n\t\t\tleft += scaleW * this.view.offsetX;\n\t\t\tright = left + scaleW * this.view.width;\n\t\t\ttop -= scaleH * this.view.offsetY;\n\t\t\tbottom = top - scaleH * this.view.height;\n\n\t\t}\n\n\t\tthis.projectionMatrix.makeOrthographic( left, right, top, bottom, this.near, this.far );\n\n\t\tthis.projectionMatrixInverse.getInverse( this.projectionMatrix );\n\n\t},\n\n\ttoJSON: function ( meta ) {\n\n\t\tvar data = Object3D.prototype.toJSON.call( this, meta );\n\n\t\tdata.object.zoom = this.zoom;\n\t\tdata.object.left = this.left;\n\t\tdata.object.right = this.right;\n\t\tdata.object.top = this.top;\n\t\tdata.object.bottom = this.bottom;\n\t\tdata.object.near = this.near;\n\t\tdata.object.far = this.far;\n\n\t\tif ( this.view !== null ) data.object.view = Object.assign( {}, this.view );\n\n\t\treturn data;\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction DirectionalLightShadow() {\n\n\tLightShadow.call( this, new OrthographicCamera( - 5, 5, 5, - 5, 0.5, 500 ) );\n\n}\n\nDirectionalLightShadow.prototype = Object.assign( Object.create( LightShadow.prototype ), {\n\n\tconstructor: DirectionalLightShadow,\n\n\tisDirectionalLightShadow: true,\n\n\tupdateMatrices: function ( light ) {\n\n\t\tLightShadow.prototype.updateMatrices.call( this, light );\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n */\n\nfunction DirectionalLight( color, intensity ) {\n\n\tLight.call( this, color, intensity );\n\n\tthis.type = 'DirectionalLight';\n\n\tthis.position.copy( Object3D.DefaultUp );\n\tthis.updateMatrix();\n\n\tthis.target = new Object3D();\n\n\tthis.shadow = new DirectionalLightShadow();\n\n}\n\nDirectionalLight.prototype = Object.assign( Object.create( Light.prototype ), {\n\n\tconstructor: DirectionalLight,\n\n\tisDirectionalLight: true,\n\n\tcopy: function ( source ) {\n\n\t\tLight.prototype.copy.call( this, source );\n\n\t\tthis.target = source.target.clone();\n\n\t\tthis.shadow = source.shadow.clone();\n\n\t\treturn this;\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction AmbientLight( color, intensity ) {\n\n\tLight.call( this, color, intensity );\n\n\tthis.type = 'AmbientLight';\n\n\tthis.castShadow = undefined;\n\n}\n\nAmbientLight.prototype = Object.assign( Object.create( Light.prototype ), {\n\n\tconstructor: AmbientLight,\n\n\tisAmbientLight: true\n\n} );\n\n/**\n * @author abelnation / http://github.com/abelnation\n */\n\nfunction RectAreaLight( color, intensity, width, height ) {\n\n\tLight.call( this, color, intensity );\n\n\tthis.type = 'RectAreaLight';\n\n\tthis.width = ( width !== undefined ) ? width : 10;\n\tthis.height = ( height !== undefined ) ? height : 10;\n\n}\n\nRectAreaLight.prototype = Object.assign( Object.create( Light.prototype ), {\n\n\tconstructor: RectAreaLight,\n\n\tisRectAreaLight: true,\n\n\tcopy: function ( source ) {\n\n\t\tLight.prototype.copy.call( this, source );\n\n\t\tthis.width = source.width;\n\t\tthis.height = source.height;\n\n\t\treturn this;\n\n\t},\n\n\ttoJSON: function ( meta ) {\n\n\t\tvar data = Light.prototype.toJSON.call( this, meta );\n\n\t\tdata.object.width = this.width;\n\t\tdata.object.height = this.height;\n\n\t\treturn data;\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction MaterialLoader( manager ) {\n\n\tLoader.call( this, manager );\n\n\tthis.textures = {};\n\n}\n\nMaterialLoader.prototype = Object.assign( Object.create( Loader.prototype ), {\n\n\tconstructor: MaterialLoader,\n\n\tload: function ( url, onLoad, onProgress, onError ) {\n\n\t\tvar scope = this;\n\n\t\tvar loader = new FileLoader( scope.manager );\n\t\tloader.setPath( scope.path );\n\t\tloader.load( url, function ( text ) {\n\n\t\t\tonLoad( scope.parse( JSON.parse( text ) ) );\n\n\t\t}, onProgress, onError );\n\n\t},\n\n\tparse: function ( json ) {\n\n\t\tvar textures = this.textures;\n\n\t\tfunction getTexture( name ) {\n\n\t\t\tif ( textures[ name ] === undefined ) {\n\n\t\t\t\tconsole.warn( 'THREE.MaterialLoader: Undefined texture', name );\n\n\t\t\t}\n\n\t\t\treturn textures[ name ];\n\n\t\t}\n\n\t\tvar material = new Materials[ json.type ]();\n\n\t\tif ( json.uuid !== undefined ) material.uuid = json.uuid;\n\t\tif ( json.name !== undefined ) material.name = json.name;\n\t\tif ( json.color !== undefined ) material.color.setHex( json.color );\n\t\tif ( json.roughness !== undefined ) material.roughness = json.roughness;\n\t\tif ( json.metalness !== undefined ) material.metalness = json.metalness;\n\t\tif ( json.sheen !== undefined ) material.sheen = new Color().setHex( json.sheen );\n\t\tif ( json.emissive !== undefined ) material.emissive.setHex( json.emissive );\n\t\tif ( json.specular !== undefined ) material.specular.setHex( json.specular );\n\t\tif ( json.shininess !== undefined ) material.shininess = json.shininess;\n\t\tif ( json.clearcoat !== undefined ) material.clearcoat = json.clearcoat;\n\t\tif ( json.clearcoatRoughness !== undefined ) material.clearcoatRoughness = json.clearcoatRoughness;\n\t\tif ( json.fog !== undefined ) material.fog = json.fog;\n\t\tif ( json.flatShading !== undefined ) material.flatShading = json.flatShading;\n\t\tif ( json.blending !== undefined ) material.blending = json.blending;\n\t\tif ( json.combine !== undefined ) material.combine = json.combine;\n\t\tif ( json.side !== undefined ) material.side = json.side;\n\t\tif ( json.opacity !== undefined ) material.opacity = json.opacity;\n\t\tif ( json.transparent !== undefined ) material.transparent = json.transparent;\n\t\tif ( json.alphaTest !== undefined ) material.alphaTest = json.alphaTest;\n\t\tif ( json.depthTest !== undefined ) material.depthTest = json.depthTest;\n\t\tif ( json.depthWrite !== undefined ) material.depthWrite = json.depthWrite;\n\t\tif ( json.colorWrite !== undefined ) material.colorWrite = json.colorWrite;\n\n\t\tif ( json.stencilWrite !== undefined ) material.stencilWrite = json.stencilWrite;\n\t\tif ( json.stencilWriteMask !== undefined ) material.stencilWriteMask = json.stencilWriteMask;\n\t\tif ( json.stencilFunc !== undefined ) material.stencilFunc = json.stencilFunc;\n\t\tif ( json.stencilRef !== undefined ) material.stencilRef = json.stencilRef;\n\t\tif ( json.stencilFuncMask !== undefined ) material.stencilFuncMask = json.stencilFuncMask;\n\t\tif ( json.stencilFail !== undefined ) material.stencilFail = json.stencilFail;\n\t\tif ( json.stencilZFail !== undefined ) material.stencilZFail = json.stencilZFail;\n\t\tif ( json.stencilZPass !== undefined ) material.stencilZPass = json.stencilZPass;\n\n\t\tif ( json.wireframe !== undefined ) material.wireframe = json.wireframe;\n\t\tif ( json.wireframeLinewidth !== undefined ) material.wireframeLinewidth = json.wireframeLinewidth;\n\t\tif ( json.wireframeLinecap !== undefined ) material.wireframeLinecap = json.wireframeLinecap;\n\t\tif ( json.wireframeLinejoin !== undefined ) material.wireframeLinejoin = json.wireframeLinejoin;\n\n\t\tif ( json.rotation !== undefined ) material.rotation = json.rotation;\n\n\t\tif ( json.linewidth !== 1 ) material.linewidth = json.linewidth;\n\t\tif ( json.dashSize !== undefined ) material.dashSize = json.dashSize;\n\t\tif ( json.gapSize !== undefined ) material.gapSize = json.gapSize;\n\t\tif ( json.scale !== undefined ) material.scale = json.scale;\n\n\t\tif ( json.polygonOffset !== undefined ) material.polygonOffset = json.polygonOffset;\n\t\tif ( json.polygonOffsetFactor !== undefined ) material.polygonOffsetFactor = json.polygonOffsetFactor;\n\t\tif ( json.polygonOffsetUnits !== undefined ) material.polygonOffsetUnits = json.polygonOffsetUnits;\n\n\t\tif ( json.skinning !== undefined ) material.skinning = json.skinning;\n\t\tif ( json.morphTargets !== undefined ) material.morphTargets = json.morphTargets;\n\t\tif ( json.morphNormals !== undefined ) material.morphNormals = json.morphNormals;\n\t\tif ( json.dithering !== undefined ) material.dithering = json.dithering;\n\n\t\tif ( json.vertexTangents !== undefined ) material.vertexTangents = json.vertexTangents;\n\n\t\tif ( json.visible !== undefined ) material.visible = json.visible;\n\n\t\tif ( json.toneMapped !== undefined ) material.toneMapped = json.toneMapped;\n\n\t\tif ( json.userData !== undefined ) material.userData = json.userData;\n\n\t\tif ( json.vertexColors !== undefined ) {\n\n\t\t\tif ( typeof json.vertexColors === 'number' ) {\n\n\t\t\t\tmaterial.vertexColors = ( json.vertexColors > 0 ) ? true : false;\n\n\t\t\t} else {\n\n\t\t\t\tmaterial.vertexColors = json.vertexColors;\n\n\t\t\t}\n\n\t\t}\n\n\t\t// Shader Material\n\n\t\tif ( json.uniforms !== undefined ) {\n\n\t\t\tfor ( var name in json.uniforms ) {\n\n\t\t\t\tvar uniform = json.uniforms[ name ];\n\n\t\t\t\tmaterial.uniforms[ name ] = {};\n\n\t\t\t\tswitch ( uniform.type ) {\n\n\t\t\t\t\tcase 't':\n\t\t\t\t\t\tmaterial.uniforms[ name ].value = getTexture( uniform.value );\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'c':\n\t\t\t\t\t\tmaterial.uniforms[ name ].value = new Color().setHex( uniform.value );\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'v2':\n\t\t\t\t\t\tmaterial.uniforms[ name ].value = new Vector2().fromArray( uniform.value );\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'v3':\n\t\t\t\t\t\tmaterial.uniforms[ name ].value = new Vector3().fromArray( uniform.value );\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'v4':\n\t\t\t\t\t\tmaterial.uniforms[ name ].value = new Vector4().fromArray( uniform.value );\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'm3':\n\t\t\t\t\t\tmaterial.uniforms[ name ].value = new Matrix3().fromArray( uniform.value );\n\n\t\t\t\t\tcase 'm4':\n\t\t\t\t\t\tmaterial.uniforms[ name ].value = new Matrix4().fromArray( uniform.value );\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tdefault:\n\t\t\t\t\t\tmaterial.uniforms[ name ].value = uniform.value;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( json.defines !== undefined ) material.defines = json.defines;\n\t\tif ( json.vertexShader !== undefined ) material.vertexShader = json.vertexShader;\n\t\tif ( json.fragmentShader !== undefined ) material.fragmentShader = json.fragmentShader;\n\n\t\tif ( json.extensions !== undefined ) {\n\n\t\t\tfor ( var key in json.extensions ) {\n\n\t\t\t\tmaterial.extensions[ key ] = json.extensions[ key ];\n\n\t\t\t}\n\n\t\t}\n\n\t\t// Deprecated\n\n\t\tif ( json.shading !== undefined ) material.flatShading = json.shading === 1; // THREE.FlatShading\n\n\t\t// for PointsMaterial\n\n\t\tif ( json.size !== undefined ) material.size = json.size;\n\t\tif ( json.sizeAttenuation !== undefined ) material.sizeAttenuation = json.sizeAttenuation;\n\n\t\t// maps\n\n\t\tif ( json.map !== undefined ) material.map = getTexture( json.map );\n\t\tif ( json.matcap !== undefined ) material.matcap = getTexture( json.matcap );\n\n\t\tif ( json.alphaMap !== undefined ) material.alphaMap = getTexture( json.alphaMap );\n\n\t\tif ( json.bumpMap !== undefined ) material.bumpMap = getTexture( json.bumpMap );\n\t\tif ( json.bumpScale !== undefined ) material.bumpScale = json.bumpScale;\n\n\t\tif ( json.normalMap !== undefined ) material.normalMap = getTexture( json.normalMap );\n\t\tif ( json.normalMapType !== undefined ) material.normalMapType = json.normalMapType;\n\t\tif ( json.normalScale !== undefined ) {\n\n\t\t\tvar normalScale = json.normalScale;\n\n\t\t\tif ( Array.isArray( normalScale ) === false ) {\n\n\t\t\t\t// Blender exporter used to export a scalar. See #7459\n\n\t\t\t\tnormalScale = [ normalScale, normalScale ];\n\n\t\t\t}\n\n\t\t\tmaterial.normalScale = new Vector2().fromArray( normalScale );\n\n\t\t}\n\n\t\tif ( json.displacementMap !== undefined ) material.displacementMap = getTexture( json.displacementMap );\n\t\tif ( json.displacementScale !== undefined ) material.displacementScale = json.displacementScale;\n\t\tif ( json.displacementBias !== undefined ) material.displacementBias = json.displacementBias;\n\n\t\tif ( json.roughnessMap !== undefined ) material.roughnessMap = getTexture( json.roughnessMap );\n\t\tif ( json.metalnessMap !== undefined ) material.metalnessMap = getTexture( json.metalnessMap );\n\n\t\tif ( json.emissiveMap !== undefined ) material.emissiveMap = getTexture( json.emissiveMap );\n\t\tif ( json.emissiveIntensity !== undefined ) material.emissiveIntensity = json.emissiveIntensity;\n\n\t\tif ( json.specularMap !== undefined ) material.specularMap = getTexture( json.specularMap );\n\n\t\tif ( json.envMap !== undefined ) material.envMap = getTexture( json.envMap );\n\t\tif ( json.envMapIntensity !== undefined ) material.envMapIntensity = json.envMapIntensity;\n\n\t\tif ( json.reflectivity !== undefined ) material.reflectivity = json.reflectivity;\n\t\tif ( json.refractionRatio !== undefined ) material.refractionRatio = json.refractionRatio;\n\n\t\tif ( json.lightMap !== undefined ) material.lightMap = getTexture( json.lightMap );\n\t\tif ( json.lightMapIntensity !== undefined ) material.lightMapIntensity = json.lightMapIntensity;\n\n\t\tif ( json.aoMap !== undefined ) material.aoMap = getTexture( json.aoMap );\n\t\tif ( json.aoMapIntensity !== undefined ) material.aoMapIntensity = json.aoMapIntensity;\n\n\t\tif ( json.gradientMap !== undefined ) material.gradientMap = getTexture( json.gradientMap );\n\n\t\tif ( json.clearcoatNormalMap !== undefined ) material.clearcoatNormalMap = getTexture( json.clearcoatNormalMap );\n\t\tif ( json.clearcoatNormalScale !== undefined ) material.clearcoatNormalScale = new Vector2().fromArray( json.clearcoatNormalScale );\n\n\t\treturn material;\n\n\t},\n\n\tsetTextures: function ( value ) {\n\n\t\tthis.textures = value;\n\t\treturn this;\n\n\t}\n\n} );\n\n/**\n * @author Don McCurdy / https://www.donmccurdy.com\n */\n\nvar LoaderUtils = {\n\n\tdecodeText: function ( array ) {\n\n\t\tif ( typeof TextDecoder !== 'undefined' ) {\n\n\t\t\treturn new TextDecoder().decode( array );\n\n\t\t}\n\n\t\t// Avoid the String.fromCharCode.apply(null, array) shortcut, which\n\t\t// throws a \"maximum call stack size exceeded\" error for large arrays.\n\n\t\tvar s = '';\n\n\t\tfor ( var i = 0, il = array.length; i < il; i ++ ) {\n\n\t\t\t// Implicitly assumes little-endian.\n\t\t\ts += String.fromCharCode( array[ i ] );\n\n\t\t}\n\n\t\ttry {\n\n\t\t\t// merges multi-byte utf-8 characters.\n\n\t\t\treturn decodeURIComponent( escape( s ) );\n\n\t\t} catch ( e ) { // see #16358\n\n\t\t\treturn s;\n\n\t\t}\n\n\t},\n\n\textractUrlBase: function ( url ) {\n\n\t\tvar index = url.lastIndexOf( '/' );\n\n\t\tif ( index === - 1 ) return './';\n\n\t\treturn url.substr( 0, index + 1 );\n\n\t}\n\n};\n\n/**\n * @author benaadams / https://twitter.com/ben_a_adams\n */\n\nfunction InstancedBufferGeometry() {\n\n\tBufferGeometry.call( this );\n\n\tthis.type = 'InstancedBufferGeometry';\n\tthis.maxInstancedCount = undefined;\n\n}\n\nInstancedBufferGeometry.prototype = Object.assign( Object.create( BufferGeometry.prototype ), {\n\n\tconstructor: InstancedBufferGeometry,\n\n\tisInstancedBufferGeometry: true,\n\n\tcopy: function ( source ) {\n\n\t\tBufferGeometry.prototype.copy.call( this, source );\n\n\t\tthis.maxInstancedCount = source.maxInstancedCount;\n\n\t\treturn this;\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor().copy( this );\n\n\t},\n\n\ttoJSON: function () {\n\n\t\tvar data = BufferGeometry.prototype.toJSON.call( this );\n\n\t\tdata.maxInstancedCount = this.maxInstancedCount;\n\n\t\tdata.isInstancedBufferGeometry = true;\n\n\t\treturn data;\n\n\t}\n\n} );\n\n/**\n * @author benaadams / https://twitter.com/ben_a_adams\n */\n\nfunction InstancedBufferAttribute( array, itemSize, normalized, meshPerAttribute ) {\n\n\tif ( typeof ( normalized ) === 'number' ) {\n\n\t\tmeshPerAttribute = normalized;\n\n\t\tnormalized = false;\n\n\t\tconsole.error( 'THREE.InstancedBufferAttribute: The constructor now expects normalized as the third argument.' );\n\n\t}\n\n\tBufferAttribute.call( this, array, itemSize, normalized );\n\n\tthis.meshPerAttribute = meshPerAttribute || 1;\n\n}\n\nInstancedBufferAttribute.prototype = Object.assign( Object.create( BufferAttribute.prototype ), {\n\n\tconstructor: InstancedBufferAttribute,\n\n\tisInstancedBufferAttribute: true,\n\n\tcopy: function ( source ) {\n\n\t\tBufferAttribute.prototype.copy.call( this, source );\n\n\t\tthis.meshPerAttribute = source.meshPerAttribute;\n\n\t\treturn this;\n\n\t},\n\n\ttoJSON: function ()\t{\n\n\t\tvar data = BufferAttribute.prototype.toJSON.call( this );\n\n\t\tdata.meshPerAttribute = this.meshPerAttribute;\n\n\t\tdata.isInstancedBufferAttribute = true;\n\n\t\treturn data;\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction BufferGeometryLoader( manager ) {\n\n\tLoader.call( this, manager );\n\n}\n\nBufferGeometryLoader.prototype = Object.assign( Object.create( Loader.prototype ), {\n\n\tconstructor: BufferGeometryLoader,\n\n\tload: function ( url, onLoad, onProgress, onError ) {\n\n\t\tvar scope = this;\n\n\t\tvar loader = new FileLoader( scope.manager );\n\t\tloader.setPath( scope.path );\n\t\tloader.load( url, function ( text ) {\n\n\t\t\tonLoad( scope.parse( JSON.parse( text ) ) );\n\n\t\t}, onProgress, onError );\n\n\t},\n\n\tparse: function ( json ) {\n\n\t\tvar geometry = json.isInstancedBufferGeometry ? new InstancedBufferGeometry() : new BufferGeometry();\n\n\t\tvar index = json.data.index;\n\n\t\tif ( index !== undefined ) {\n\n\t\t\tvar typedArray = new TYPED_ARRAYS[ index.type ]( index.array );\n\t\t\tgeometry.setIndex( new BufferAttribute( typedArray, 1 ) );\n\n\t\t}\n\n\t\tvar attributes = json.data.attributes;\n\n\t\tfor ( var key in attributes ) {\n\n\t\t\tvar attribute = attributes[ key ];\n\t\t\tvar typedArray = new TYPED_ARRAYS[ attribute.type ]( attribute.array );\n\t\t\tvar bufferAttributeConstr = attribute.isInstancedBufferAttribute ? InstancedBufferAttribute : BufferAttribute;\n\t\t\tvar bufferAttribute = new bufferAttributeConstr( typedArray, attribute.itemSize, attribute.normalized );\n\t\t\tif ( attribute.name !== undefined ) bufferAttribute.name = attribute.name;\n\t\t\tgeometry.setAttribute( key, bufferAttribute );\n\n\t\t}\n\n\t\tvar morphAttributes = json.data.morphAttributes;\n\n\t\tif ( morphAttributes ) {\n\n\t\t\tfor ( var key in morphAttributes ) {\n\n\t\t\t\tvar attributeArray = morphAttributes[ key ];\n\n\t\t\t\tvar array = [];\n\n\t\t\t\tfor ( var i = 0, il = attributeArray.length; i < il; i ++ ) {\n\n\t\t\t\t\tvar attribute = attributeArray[ i ];\n\t\t\t\t\tvar typedArray = new TYPED_ARRAYS[ attribute.type ]( attribute.array );\n\n\t\t\t\t\tvar bufferAttribute = new BufferAttribute( typedArray, attribute.itemSize, attribute.normalized );\n\t\t\t\t\tif ( attribute.name !== undefined ) bufferAttribute.name = attribute.name;\n\t\t\t\t\tarray.push( bufferAttribute );\n\n\t\t\t\t}\n\n\t\t\t\tgeometry.morphAttributes[ key ] = array;\n\n\t\t\t}\n\n\t\t}\n\n\t\tvar morphTargetsRelative = json.data.morphTargetsRelative;\n\n\t\tif ( morphTargetsRelative ) {\n\n\t\t\tgeometry.morphTargetsRelative = true;\n\n\t\t}\n\n\t\tvar groups = json.data.groups || json.data.drawcalls || json.data.offsets;\n\n\t\tif ( groups !== undefined ) {\n\n\t\t\tfor ( var i = 0, n = groups.length; i !== n; ++ i ) {\n\n\t\t\t\tvar group = groups[ i ];\n\n\t\t\t\tgeometry.addGroup( group.start, group.count, group.materialIndex );\n\n\t\t\t}\n\n\t\t}\n\n\t\tvar boundingSphere = json.data.boundingSphere;\n\n\t\tif ( boundingSphere !== undefined ) {\n\n\t\t\tvar center = new Vector3();\n\n\t\t\tif ( boundingSphere.center !== undefined ) {\n\n\t\t\t\tcenter.fromArray( boundingSphere.center );\n\n\t\t\t}\n\n\t\t\tgeometry.boundingSphere = new Sphere( center, boundingSphere.radius );\n\n\t\t}\n\n\t\tif ( json.name ) geometry.name = json.name;\n\t\tif ( json.userData ) geometry.userData = json.userData;\n\n\t\treturn geometry;\n\n\t}\n\n} );\n\nvar TYPED_ARRAYS = {\n\tInt8Array: Int8Array,\n\tUint8Array: Uint8Array,\n\t// Workaround for IE11 pre KB2929437. See #11440\n\tUint8ClampedArray: typeof Uint8ClampedArray !== 'undefined' ? Uint8ClampedArray : Uint8Array,\n\tInt16Array: Int16Array,\n\tUint16Array: Uint16Array,\n\tInt32Array: Int32Array,\n\tUint32Array: Uint32Array,\n\tFloat32Array: Float32Array,\n\tFloat64Array: Float64Array\n};\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction ObjectLoader( manager ) {\n\n\tLoader.call( this, manager );\n\n}\n\nObjectLoader.prototype = Object.assign( Object.create( Loader.prototype ), {\n\n\tconstructor: ObjectLoader,\n\n\tload: function ( url, onLoad, onProgress, onError ) {\n\n\t\tvar scope = this;\n\n\t\tvar path = ( this.path === '' ) ? LoaderUtils.extractUrlBase( url ) : this.path;\n\t\tthis.resourcePath = this.resourcePath || path;\n\n\t\tvar loader = new FileLoader( scope.manager );\n\t\tloader.setPath( this.path );\n\t\tloader.load( url, function ( text ) {\n\n\t\t\tvar json = null;\n\n\t\t\ttry {\n\n\t\t\t\tjson = JSON.parse( text );\n\n\t\t\t} catch ( error ) {\n\n\t\t\t\tif ( onError !== undefined ) onError( error );\n\n\t\t\t\tconsole.error( 'THREE:ObjectLoader: Can\\'t parse ' + url + '.', error.message );\n\n\t\t\t\treturn;\n\n\t\t\t}\n\n\t\t\tvar metadata = json.metadata;\n\n\t\t\tif ( metadata === undefined || metadata.type === undefined || metadata.type.toLowerCase() === 'geometry' ) {\n\n\t\t\t\tconsole.error( 'THREE.ObjectLoader: Can\\'t load ' + url );\n\t\t\t\treturn;\n\n\t\t\t}\n\n\t\t\tscope.parse( json, onLoad );\n\n\t\t}, onProgress, onError );\n\n\t},\n\n\tparse: function ( json, onLoad ) {\n\n\t\tvar shapes = this.parseShape( json.shapes );\n\t\tvar geometries = this.parseGeometries( json.geometries, shapes );\n\n\t\tvar images = this.parseImages( json.images, function () {\n\n\t\t\tif ( onLoad !== undefined ) onLoad( object );\n\n\t\t} );\n\n\t\tvar textures = this.parseTextures( json.textures, images );\n\t\tvar materials = this.parseMaterials( json.materials, textures );\n\n\t\tvar object = this.parseObject( json.object, geometries, materials );\n\n\t\tif ( json.animations ) {\n\n\t\t\tobject.animations = this.parseAnimations( json.animations );\n\n\t\t}\n\n\t\tif ( json.images === undefined || json.images.length === 0 ) {\n\n\t\t\tif ( onLoad !== undefined ) onLoad( object );\n\n\t\t}\n\n\t\treturn object;\n\n\t},\n\n\tparseShape: function ( json ) {\n\n\t\tvar shapes = {};\n\n\t\tif ( json !== undefined ) {\n\n\t\t\tfor ( var i = 0, l = json.length; i < l; i ++ ) {\n\n\t\t\t\tvar shape = new Shape().fromJSON( json[ i ] );\n\n\t\t\t\tshapes[ shape.uuid ] = shape;\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn shapes;\n\n\t},\n\n\tparseGeometries: function ( json, shapes ) {\n\n\t\tvar geometries = {};\n\n\t\tif ( json !== undefined ) {\n\n\t\t\tvar bufferGeometryLoader = new BufferGeometryLoader();\n\n\t\t\tfor ( var i = 0, l = json.length; i < l; i ++ ) {\n\n\t\t\t\tvar geometry;\n\t\t\t\tvar data = json[ i ];\n\n\t\t\t\tswitch ( data.type ) {\n\n\t\t\t\t\tcase 'PlaneGeometry':\n\t\t\t\t\tcase 'PlaneBufferGeometry':\n\n\t\t\t\t\t\tgeometry = new Geometries[ data.type ](\n\t\t\t\t\t\t\tdata.width,\n\t\t\t\t\t\t\tdata.height,\n\t\t\t\t\t\t\tdata.widthSegments,\n\t\t\t\t\t\t\tdata.heightSegments\n\t\t\t\t\t\t);\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'BoxGeometry':\n\t\t\t\t\tcase 'BoxBufferGeometry':\n\t\t\t\t\tcase 'CubeGeometry': // backwards compatible\n\n\t\t\t\t\t\tgeometry = new Geometries[ data.type ](\n\t\t\t\t\t\t\tdata.width,\n\t\t\t\t\t\t\tdata.height,\n\t\t\t\t\t\t\tdata.depth,\n\t\t\t\t\t\t\tdata.widthSegments,\n\t\t\t\t\t\t\tdata.heightSegments,\n\t\t\t\t\t\t\tdata.depthSegments\n\t\t\t\t\t\t);\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'CircleGeometry':\n\t\t\t\t\tcase 'CircleBufferGeometry':\n\n\t\t\t\t\t\tgeometry = new Geometries[ data.type ](\n\t\t\t\t\t\t\tdata.radius,\n\t\t\t\t\t\t\tdata.segments,\n\t\t\t\t\t\t\tdata.thetaStart,\n\t\t\t\t\t\t\tdata.thetaLength\n\t\t\t\t\t\t);\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'CylinderGeometry':\n\t\t\t\t\tcase 'CylinderBufferGeometry':\n\n\t\t\t\t\t\tgeometry = new Geometries[ data.type ](\n\t\t\t\t\t\t\tdata.radiusTop,\n\t\t\t\t\t\t\tdata.radiusBottom,\n\t\t\t\t\t\t\tdata.height,\n\t\t\t\t\t\t\tdata.radialSegments,\n\t\t\t\t\t\t\tdata.heightSegments,\n\t\t\t\t\t\t\tdata.openEnded,\n\t\t\t\t\t\t\tdata.thetaStart,\n\t\t\t\t\t\t\tdata.thetaLength\n\t\t\t\t\t\t);\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'ConeGeometry':\n\t\t\t\t\tcase 'ConeBufferGeometry':\n\n\t\t\t\t\t\tgeometry = new Geometries[ data.type ](\n\t\t\t\t\t\t\tdata.radius,\n\t\t\t\t\t\t\tdata.height,\n\t\t\t\t\t\t\tdata.radialSegments,\n\t\t\t\t\t\t\tdata.heightSegments,\n\t\t\t\t\t\t\tdata.openEnded,\n\t\t\t\t\t\t\tdata.thetaStart,\n\t\t\t\t\t\t\tdata.thetaLength\n\t\t\t\t\t\t);\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'SphereGeometry':\n\t\t\t\t\tcase 'SphereBufferGeometry':\n\n\t\t\t\t\t\tgeometry = new Geometries[ data.type ](\n\t\t\t\t\t\t\tdata.radius,\n\t\t\t\t\t\t\tdata.widthSegments,\n\t\t\t\t\t\t\tdata.heightSegments,\n\t\t\t\t\t\t\tdata.phiStart,\n\t\t\t\t\t\t\tdata.phiLength,\n\t\t\t\t\t\t\tdata.thetaStart,\n\t\t\t\t\t\t\tdata.thetaLength\n\t\t\t\t\t\t);\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'DodecahedronGeometry':\n\t\t\t\t\tcase 'DodecahedronBufferGeometry':\n\t\t\t\t\tcase 'IcosahedronGeometry':\n\t\t\t\t\tcase 'IcosahedronBufferGeometry':\n\t\t\t\t\tcase 'OctahedronGeometry':\n\t\t\t\t\tcase 'OctahedronBufferGeometry':\n\t\t\t\t\tcase 'TetrahedronGeometry':\n\t\t\t\t\tcase 'TetrahedronBufferGeometry':\n\n\t\t\t\t\t\tgeometry = new Geometries[ data.type ](\n\t\t\t\t\t\t\tdata.radius,\n\t\t\t\t\t\t\tdata.detail\n\t\t\t\t\t\t);\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'RingGeometry':\n\t\t\t\t\tcase 'RingBufferGeometry':\n\n\t\t\t\t\t\tgeometry = new Geometries[ data.type ](\n\t\t\t\t\t\t\tdata.innerRadius,\n\t\t\t\t\t\t\tdata.outerRadius,\n\t\t\t\t\t\t\tdata.thetaSegments,\n\t\t\t\t\t\t\tdata.phiSegments,\n\t\t\t\t\t\t\tdata.thetaStart,\n\t\t\t\t\t\t\tdata.thetaLength\n\t\t\t\t\t\t);\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'TorusGeometry':\n\t\t\t\t\tcase 'TorusBufferGeometry':\n\n\t\t\t\t\t\tgeometry = new Geometries[ data.type ](\n\t\t\t\t\t\t\tdata.radius,\n\t\t\t\t\t\t\tdata.tube,\n\t\t\t\t\t\t\tdata.radialSegments,\n\t\t\t\t\t\t\tdata.tubularSegments,\n\t\t\t\t\t\t\tdata.arc\n\t\t\t\t\t\t);\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'TorusKnotGeometry':\n\t\t\t\t\tcase 'TorusKnotBufferGeometry':\n\n\t\t\t\t\t\tgeometry = new Geometries[ data.type ](\n\t\t\t\t\t\t\tdata.radius,\n\t\t\t\t\t\t\tdata.tube,\n\t\t\t\t\t\t\tdata.tubularSegments,\n\t\t\t\t\t\t\tdata.radialSegments,\n\t\t\t\t\t\t\tdata.p,\n\t\t\t\t\t\t\tdata.q\n\t\t\t\t\t\t);\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'TubeGeometry':\n\t\t\t\t\tcase 'TubeBufferGeometry':\n\n\t\t\t\t\t\t// This only works for built-in curves (e.g. CatmullRomCurve3).\n\t\t\t\t\t\t// User defined curves or instances of CurvePath will not be deserialized.\n\t\t\t\t\t\tgeometry = new Geometries[ data.type ](\n\t\t\t\t\t\t\tnew Curves[ data.path.type ]().fromJSON( data.path ),\n\t\t\t\t\t\t\tdata.tubularSegments,\n\t\t\t\t\t\t\tdata.radius,\n\t\t\t\t\t\t\tdata.radialSegments,\n\t\t\t\t\t\t\tdata.closed\n\t\t\t\t\t\t);\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'LatheGeometry':\n\t\t\t\t\tcase 'LatheBufferGeometry':\n\n\t\t\t\t\t\tgeometry = new Geometries[ data.type ](\n\t\t\t\t\t\t\tdata.points,\n\t\t\t\t\t\t\tdata.segments,\n\t\t\t\t\t\t\tdata.phiStart,\n\t\t\t\t\t\t\tdata.phiLength\n\t\t\t\t\t\t);\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'PolyhedronGeometry':\n\t\t\t\t\tcase 'PolyhedronBufferGeometry':\n\n\t\t\t\t\t\tgeometry = new Geometries[ data.type ](\n\t\t\t\t\t\t\tdata.vertices,\n\t\t\t\t\t\t\tdata.indices,\n\t\t\t\t\t\t\tdata.radius,\n\t\t\t\t\t\t\tdata.details\n\t\t\t\t\t\t);\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'ShapeGeometry':\n\t\t\t\t\tcase 'ShapeBufferGeometry':\n\n\t\t\t\t\t\tvar geometryShapes = [];\n\n\t\t\t\t\t\tfor ( var j = 0, jl = data.shapes.length; j < jl; j ++ ) {\n\n\t\t\t\t\t\t\tvar shape = shapes[ data.shapes[ j ] ];\n\n\t\t\t\t\t\t\tgeometryShapes.push( shape );\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tgeometry = new Geometries[ data.type ](\n\t\t\t\t\t\t\tgeometryShapes,\n\t\t\t\t\t\t\tdata.curveSegments\n\t\t\t\t\t\t);\n\n\t\t\t\t\t\tbreak;\n\n\n\t\t\t\t\tcase 'ExtrudeGeometry':\n\t\t\t\t\tcase 'ExtrudeBufferGeometry':\n\n\t\t\t\t\t\tvar geometryShapes = [];\n\n\t\t\t\t\t\tfor ( var j = 0, jl = data.shapes.length; j < jl; j ++ ) {\n\n\t\t\t\t\t\t\tvar shape = shapes[ data.shapes[ j ] ];\n\n\t\t\t\t\t\t\tgeometryShapes.push( shape );\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tvar extrudePath = data.options.extrudePath;\n\n\t\t\t\t\t\tif ( extrudePath !== undefined ) {\n\n\t\t\t\t\t\t\tdata.options.extrudePath = new Curves[ extrudePath.type ]().fromJSON( extrudePath );\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tgeometry = new Geometries[ data.type ](\n\t\t\t\t\t\t\tgeometryShapes,\n\t\t\t\t\t\t\tdata.options\n\t\t\t\t\t\t);\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'BufferGeometry':\n\t\t\t\t\tcase 'InstancedBufferGeometry':\n\n\t\t\t\t\t\tgeometry = bufferGeometryLoader.parse( data );\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tcase 'Geometry':\n\n\t\t\t\t\t\tconsole.error( 'THREE.ObjectLoader: Loading \"Geometry\" is not supported anymore.' );\n\n\t\t\t\t\t\tbreak;\n\n\t\t\t\t\tdefault:\n\n\t\t\t\t\t\tconsole.warn( 'THREE.ObjectLoader: Unsupported geometry type \"' + data.type + '\"' );\n\n\t\t\t\t\t\tcontinue;\n\n\t\t\t\t}\n\n\t\t\t\tgeometry.uuid = data.uuid;\n\n\t\t\t\tif ( data.name !== undefined ) geometry.name = data.name;\n\t\t\t\tif ( geometry.isBufferGeometry === true && data.userData !== undefined ) geometry.userData = data.userData;\n\n\t\t\t\tgeometries[ data.uuid ] = geometry;\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn geometries;\n\n\t},\n\n\tparseMaterials: function ( json, textures ) {\n\n\t\tvar cache = {}; // MultiMaterial\n\t\tvar materials = {};\n\n\t\tif ( json !== undefined ) {\n\n\t\t\tvar loader = new MaterialLoader();\n\t\t\tloader.setTextures( textures );\n\n\t\t\tfor ( var i = 0, l = json.length; i < l; i ++ ) {\n\n\t\t\t\tvar data = json[ i ];\n\n\t\t\t\tif ( data.type === 'MultiMaterial' ) {\n\n\t\t\t\t\t// Deprecated\n\n\t\t\t\t\tvar array = [];\n\n\t\t\t\t\tfor ( var j = 0; j < data.materials.length; j ++ ) {\n\n\t\t\t\t\t\tvar material = data.materials[ j ];\n\n\t\t\t\t\t\tif ( cache[ material.uuid ] === undefined ) {\n\n\t\t\t\t\t\t\tcache[ material.uuid ] = loader.parse( material );\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tarray.push( cache[ material.uuid ] );\n\n\t\t\t\t\t}\n\n\t\t\t\t\tmaterials[ data.uuid ] = array;\n\n\t\t\t\t} else {\n\n\t\t\t\t\tif ( cache[ data.uuid ] === undefined ) {\n\n\t\t\t\t\t\tcache[ data.uuid ] = loader.parse( data );\n\n\t\t\t\t\t}\n\n\t\t\t\t\tmaterials[ data.uuid ] = cache[ data.uuid ];\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn materials;\n\n\t},\n\n\tparseAnimations: function ( json ) {\n\n\t\tvar animations = [];\n\n\t\tfor ( var i = 0; i < json.length; i ++ ) {\n\n\t\t\tvar data = json[ i ];\n\n\t\t\tvar clip = AnimationClip.parse( data );\n\n\t\t\tif ( data.uuid !== undefined ) clip.uuid = data.uuid;\n\n\t\t\tanimations.push( clip );\n\n\t\t}\n\n\t\treturn animations;\n\n\t},\n\n\tparseImages: function ( json, onLoad ) {\n\n\t\tvar scope = this;\n\t\tvar images = {};\n\n\t\tfunction loadImage( url ) {\n\n\t\t\tscope.manager.itemStart( url );\n\n\t\t\treturn loader.load( url, function () {\n\n\t\t\t\tscope.manager.itemEnd( url );\n\n\t\t\t}, undefined, function () {\n\n\t\t\t\tscope.manager.itemError( url );\n\t\t\t\tscope.manager.itemEnd( url );\n\n\t\t\t} );\n\n\t\t}\n\n\t\tif ( json !== undefined && json.length > 0 ) {\n\n\t\t\tvar manager = new LoadingManager( onLoad );\n\n\t\t\tvar loader = new ImageLoader( manager );\n\t\t\tloader.setCrossOrigin( this.crossOrigin );\n\n\t\t\tfor ( var i = 0, il = json.length; i < il; i ++ ) {\n\n\t\t\t\tvar image = json[ i ];\n\t\t\t\tvar url = image.url;\n\n\t\t\t\tif ( Array.isArray( url ) ) {\n\n\t\t\t\t\t// load array of images e.g CubeTexture\n\n\t\t\t\t\timages[ image.uuid ] = [];\n\n\t\t\t\t\tfor ( var j = 0, jl = url.length; j < jl; j ++ ) {\n\n\t\t\t\t\t\tvar currentUrl = url[ j ];\n\n\t\t\t\t\t\tvar path = /^(\\/\\/)|([a-z]+:(\\/\\/)?)/i.test( currentUrl ) ? currentUrl : scope.resourcePath + currentUrl;\n\n\t\t\t\t\t\timages[ image.uuid ].push( loadImage( path ) );\n\n\t\t\t\t\t}\n\n\t\t\t\t} else {\n\n\t\t\t\t\t// load single image\n\n\t\t\t\t\tvar path = /^(\\/\\/)|([a-z]+:(\\/\\/)?)/i.test( image.url ) ? image.url : scope.resourcePath + image.url;\n\n\t\t\t\t\timages[ image.uuid ] = loadImage( path );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn images;\n\n\t},\n\n\tparseTextures: function ( json, images ) {\n\n\t\tfunction parseConstant( value, type ) {\n\n\t\t\tif ( typeof value === 'number' ) return value;\n\n\t\t\tconsole.warn( 'THREE.ObjectLoader.parseTexture: Constant should be in numeric form.', value );\n\n\t\t\treturn type[ value ];\n\n\t\t}\n\n\t\tvar textures = {};\n\n\t\tif ( json !== undefined ) {\n\n\t\t\tfor ( var i = 0, l = json.length; i < l; i ++ ) {\n\n\t\t\t\tvar data = json[ i ];\n\n\t\t\t\tif ( data.image === undefined ) {\n\n\t\t\t\t\tconsole.warn( 'THREE.ObjectLoader: No \"image\" specified for', data.uuid );\n\n\t\t\t\t}\n\n\t\t\t\tif ( images[ data.image ] === undefined ) {\n\n\t\t\t\t\tconsole.warn( 'THREE.ObjectLoader: Undefined image', data.image );\n\n\t\t\t\t}\n\n\t\t\t\tvar texture;\n\n\t\t\t\tif ( Array.isArray( images[ data.image ] ) ) {\n\n\t\t\t\t\ttexture = new CubeTexture( images[ data.image ] );\n\n\t\t\t\t} else {\n\n\t\t\t\t\ttexture = new Texture( images[ data.image ] );\n\n\t\t\t\t}\n\n\t\t\t\ttexture.needsUpdate = true;\n\n\t\t\t\ttexture.uuid = data.uuid;\n\n\t\t\t\tif ( data.name !== undefined ) texture.name = data.name;\n\n\t\t\t\tif ( data.mapping !== undefined ) texture.mapping = parseConstant( data.mapping, TEXTURE_MAPPING );\n\n\t\t\t\tif ( data.offset !== undefined ) texture.offset.fromArray( data.offset );\n\t\t\t\tif ( data.repeat !== undefined ) texture.repeat.fromArray( data.repeat );\n\t\t\t\tif ( data.center !== undefined ) texture.center.fromArray( data.center );\n\t\t\t\tif ( data.rotation !== undefined ) texture.rotation = data.rotation;\n\n\t\t\t\tif ( data.wrap !== undefined ) {\n\n\t\t\t\t\ttexture.wrapS = parseConstant( data.wrap[ 0 ], TEXTURE_WRAPPING );\n\t\t\t\t\ttexture.wrapT = parseConstant( data.wrap[ 1 ], TEXTURE_WRAPPING );\n\n\t\t\t\t}\n\n\t\t\t\tif ( data.format !== undefined ) texture.format = data.format;\n\t\t\t\tif ( data.type !== undefined ) texture.type = data.type;\n\t\t\t\tif ( data.encoding !== undefined ) texture.encoding = data.encoding;\n\n\t\t\t\tif ( data.minFilter !== undefined ) texture.minFilter = parseConstant( data.minFilter, TEXTURE_FILTER );\n\t\t\t\tif ( data.magFilter !== undefined ) texture.magFilter = parseConstant( data.magFilter, TEXTURE_FILTER );\n\t\t\t\tif ( data.anisotropy !== undefined ) texture.anisotropy = data.anisotropy;\n\n\t\t\t\tif ( data.flipY !== undefined ) texture.flipY = data.flipY;\n\n\t\t\t\tif ( data.premultiplyAlpha !== undefined ) texture.premultiplyAlpha = data.premultiplyAlpha;\n\t\t\t\tif ( data.unpackAlignment !== undefined ) texture.unpackAlignment = data.unpackAlignment;\n\n\t\t\t\ttextures[ data.uuid ] = texture;\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn textures;\n\n\t},\n\n\tparseObject: function ( data, geometries, materials ) {\n\n\t\tvar object;\n\n\t\tfunction getGeometry( name ) {\n\n\t\t\tif ( geometries[ name ] === undefined ) {\n\n\t\t\t\tconsole.warn( 'THREE.ObjectLoader: Undefined geometry', name );\n\n\t\t\t}\n\n\t\t\treturn geometries[ name ];\n\n\t\t}\n\n\t\tfunction getMaterial( name ) {\n\n\t\t\tif ( name === undefined ) return undefined;\n\n\t\t\tif ( Array.isArray( name ) ) {\n\n\t\t\t\tvar array = [];\n\n\t\t\t\tfor ( var i = 0, l = name.length; i < l; i ++ ) {\n\n\t\t\t\t\tvar uuid = name[ i ];\n\n\t\t\t\t\tif ( materials[ uuid ] === undefined ) {\n\n\t\t\t\t\t\tconsole.warn( 'THREE.ObjectLoader: Undefined material', uuid );\n\n\t\t\t\t\t}\n\n\t\t\t\t\tarray.push( materials[ uuid ] );\n\n\t\t\t\t}\n\n\t\t\t\treturn array;\n\n\t\t\t}\n\n\t\t\tif ( materials[ name ] === undefined ) {\n\n\t\t\t\tconsole.warn( 'THREE.ObjectLoader: Undefined material', name );\n\n\t\t\t}\n\n\t\t\treturn materials[ name ];\n\n\t\t}\n\n\t\tswitch ( data.type ) {\n\n\t\t\tcase 'Scene':\n\n\t\t\t\tobject = new Scene();\n\n\t\t\t\tif ( data.background !== undefined ) {\n\n\t\t\t\t\tif ( Number.isInteger( data.background ) ) {\n\n\t\t\t\t\t\tobject.background = new Color( data.background );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\tif ( data.fog !== undefined ) {\n\n\t\t\t\t\tif ( data.fog.type === 'Fog' ) {\n\n\t\t\t\t\t\tobject.fog = new Fog( data.fog.color, data.fog.near, data.fog.far );\n\n\t\t\t\t\t} else if ( data.fog.type === 'FogExp2' ) {\n\n\t\t\t\t\t\tobject.fog = new FogExp2( data.fog.color, data.fog.density );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'PerspectiveCamera':\n\n\t\t\t\tobject = new PerspectiveCamera( data.fov, data.aspect, data.near, data.far );\n\n\t\t\t\tif ( data.focus !== undefined ) object.focus = data.focus;\n\t\t\t\tif ( data.zoom !== undefined ) object.zoom = data.zoom;\n\t\t\t\tif ( data.filmGauge !== undefined ) object.filmGauge = data.filmGauge;\n\t\t\t\tif ( data.filmOffset !== undefined ) object.filmOffset = data.filmOffset;\n\t\t\t\tif ( data.view !== undefined ) object.view = Object.assign( {}, data.view );\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'OrthographicCamera':\n\n\t\t\t\tobject = new OrthographicCamera( data.left, data.right, data.top, data.bottom, data.near, data.far );\n\n\t\t\t\tif ( data.zoom !== undefined ) object.zoom = data.zoom;\n\t\t\t\tif ( data.view !== undefined ) object.view = Object.assign( {}, data.view );\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'AmbientLight':\n\n\t\t\t\tobject = new AmbientLight( data.color, data.intensity );\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'DirectionalLight':\n\n\t\t\t\tobject = new DirectionalLight( data.color, data.intensity );\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'PointLight':\n\n\t\t\t\tobject = new PointLight( data.color, data.intensity, data.distance, data.decay );\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'RectAreaLight':\n\n\t\t\t\tobject = new RectAreaLight( data.color, data.intensity, data.width, data.height );\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'SpotLight':\n\n\t\t\t\tobject = new SpotLight( data.color, data.intensity, data.distance, data.angle, data.penumbra, data.decay );\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'HemisphereLight':\n\n\t\t\t\tobject = new HemisphereLight( data.color, data.groundColor, data.intensity );\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'SkinnedMesh':\n\n\t\t\t\tconsole.warn( 'THREE.ObjectLoader.parseObject() does not support SkinnedMesh yet.' );\n\n\t\t\tcase 'Mesh':\n\n\t\t\t\tvar geometry = getGeometry( data.geometry );\n\t\t\t\tvar material = getMaterial( data.material );\n\n\t\t\t\tif ( geometry.bones && geometry.bones.length > 0 ) {\n\n\t\t\t\t\tobject = new SkinnedMesh( geometry, material );\n\n\t\t\t\t} else {\n\n\t\t\t\t\tobject = new Mesh( geometry, material );\n\n\t\t\t\t}\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'InstancedMesh':\n\n\t\t\t\tvar geometry = getGeometry( data.geometry );\n\t\t\t\tvar material = getMaterial( data.material );\n\t\t\t\tvar count = data.count;\n\t\t\t\tvar instanceMatrix = data.instanceMatrix;\n\n\t\t\t\tobject = new InstancedMesh( geometry, material, count );\n\t\t\t\tobject.instanceMatrix = new BufferAttribute( new Float32Array( instanceMatrix.array ), 16 );\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'LOD':\n\n\t\t\t\tobject = new LOD();\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'Line':\n\n\t\t\t\tobject = new Line( getGeometry( data.geometry ), getMaterial( data.material ), data.mode );\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'LineLoop':\n\n\t\t\t\tobject = new LineLoop( getGeometry( data.geometry ), getMaterial( data.material ) );\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'LineSegments':\n\n\t\t\t\tobject = new LineSegments( getGeometry( data.geometry ), getMaterial( data.material ) );\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'PointCloud':\n\t\t\tcase 'Points':\n\n\t\t\t\tobject = new Points( getGeometry( data.geometry ), getMaterial( data.material ) );\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'Sprite':\n\n\t\t\t\tobject = new Sprite( getMaterial( data.material ) );\n\n\t\t\t\tbreak;\n\n\t\t\tcase 'Group':\n\n\t\t\t\tobject = new Group();\n\n\t\t\t\tbreak;\n\n\t\t\tdefault:\n\n\t\t\t\tobject = new Object3D();\n\n\t\t}\n\n\t\tobject.uuid = data.uuid;\n\n\t\tif ( data.name !== undefined ) object.name = data.name;\n\n\t\tif ( data.matrix !== undefined ) {\n\n\t\t\tobject.matrix.fromArray( data.matrix );\n\n\t\t\tif ( data.matrixAutoUpdate !== undefined ) object.matrixAutoUpdate = data.matrixAutoUpdate;\n\t\t\tif ( object.matrixAutoUpdate ) object.matrix.decompose( object.position, object.quaternion, object.scale );\n\n\t\t} else {\n\n\t\t\tif ( data.position !== undefined ) object.position.fromArray( data.position );\n\t\t\tif ( data.rotation !== undefined ) object.rotation.fromArray( data.rotation );\n\t\t\tif ( data.quaternion !== undefined ) object.quaternion.fromArray( data.quaternion );\n\t\t\tif ( data.scale !== undefined ) object.scale.fromArray( data.scale );\n\n\t\t}\n\n\t\tif ( data.castShadow !== undefined ) object.castShadow = data.castShadow;\n\t\tif ( data.receiveShadow !== undefined ) object.receiveShadow = data.receiveShadow;\n\n\t\tif ( data.shadow ) {\n\n\t\t\tif ( data.shadow.bias !== undefined ) object.shadow.bias = data.shadow.bias;\n\t\t\tif ( data.shadow.radius !== undefined ) object.shadow.radius = data.shadow.radius;\n\t\t\tif ( data.shadow.mapSize !== undefined ) object.shadow.mapSize.fromArray( data.shadow.mapSize );\n\t\t\tif ( data.shadow.camera !== undefined ) object.shadow.camera = this.parseObject( data.shadow.camera );\n\n\t\t}\n\n\t\tif ( data.visible !== undefined ) object.visible = data.visible;\n\t\tif ( data.frustumCulled !== undefined ) object.frustumCulled = data.frustumCulled;\n\t\tif ( data.renderOrder !== undefined ) object.renderOrder = data.renderOrder;\n\t\tif ( data.userData !== undefined ) object.userData = data.userData;\n\t\tif ( data.layers !== undefined ) object.layers.mask = data.layers;\n\n\t\tif ( data.children !== undefined ) {\n\n\t\t\tvar children = data.children;\n\n\t\t\tfor ( var i = 0; i < children.length; i ++ ) {\n\n\t\t\t\tobject.add( this.parseObject( children[ i ], geometries, materials ) );\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( data.type === 'LOD' ) {\n\n\t\t\tif ( data.autoUpdate !== undefined ) object.autoUpdate = data.autoUpdate;\n\n\t\t\tvar levels = data.levels;\n\n\t\t\tfor ( var l = 0; l < levels.length; l ++ ) {\n\n\t\t\t\tvar level = levels[ l ];\n\t\t\t\tvar child = object.getObjectByProperty( 'uuid', level.object );\n\n\t\t\t\tif ( child !== undefined ) {\n\n\t\t\t\t\tobject.addLevel( child, level.distance );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn object;\n\n\t}\n\n} );\n\nvar TEXTURE_MAPPING = {\n\tUVMapping: UVMapping,\n\tCubeReflectionMapping: CubeReflectionMapping,\n\tCubeRefractionMapping: CubeRefractionMapping,\n\tEquirectangularReflectionMapping: EquirectangularReflectionMapping,\n\tEquirectangularRefractionMapping: EquirectangularRefractionMapping,\n\tSphericalReflectionMapping: SphericalReflectionMapping,\n\tCubeUVReflectionMapping: CubeUVReflectionMapping,\n\tCubeUVRefractionMapping: CubeUVRefractionMapping\n};\n\nvar TEXTURE_WRAPPING = {\n\tRepeatWrapping: RepeatWrapping,\n\tClampToEdgeWrapping: ClampToEdgeWrapping,\n\tMirroredRepeatWrapping: MirroredRepeatWrapping\n};\n\nvar TEXTURE_FILTER = {\n\tNearestFilter: NearestFilter,\n\tNearestMipmapNearestFilter: NearestMipmapNearestFilter,\n\tNearestMipmapLinearFilter: NearestMipmapLinearFilter,\n\tLinearFilter: LinearFilter,\n\tLinearMipmapNearestFilter: LinearMipmapNearestFilter,\n\tLinearMipmapLinearFilter: LinearMipmapLinearFilter\n};\n\n/**\n * @author thespite / http://clicktorelease.com/\n */\n\n\nfunction ImageBitmapLoader( manager ) {\n\n\tif ( typeof createImageBitmap === 'undefined' ) {\n\n\t\tconsole.warn( 'THREE.ImageBitmapLoader: createImageBitmap() not supported.' );\n\n\t}\n\n\tif ( typeof fetch === 'undefined' ) {\n\n\t\tconsole.warn( 'THREE.ImageBitmapLoader: fetch() not supported.' );\n\n\t}\n\n\tLoader.call( this, manager );\n\n\tthis.options = undefined;\n\n}\n\nImageBitmapLoader.prototype = Object.assign( Object.create( Loader.prototype ), {\n\n\tconstructor: ImageBitmapLoader,\n\n\tsetOptions: function setOptions( options ) {\n\n\t\tthis.options = options;\n\n\t\treturn this;\n\n\t},\n\n\tload: function ( url, onLoad, onProgress, onError ) {\n\n\t\tif ( url === undefined ) url = '';\n\n\t\tif ( this.path !== undefined ) url = this.path + url;\n\n\t\turl = this.manager.resolveURL( url );\n\n\t\tvar scope = this;\n\n\t\tvar cached = Cache.get( url );\n\n\t\tif ( cached !== undefined ) {\n\n\t\t\tscope.manager.itemStart( url );\n\n\t\t\tsetTimeout( function () {\n\n\t\t\t\tif ( onLoad ) onLoad( cached );\n\n\t\t\t\tscope.manager.itemEnd( url );\n\n\t\t\t}, 0 );\n\n\t\t\treturn cached;\n\n\t\t}\n\n\t\tfetch( url ).then( function ( res ) {\n\n\t\t\treturn res.blob();\n\n\t\t} ).then( function ( blob ) {\n\n\t\t\tif ( scope.options === undefined ) {\n\n\t\t\t\t// Workaround for FireFox. It causes an error if you pass options.\n\t\t\t\treturn createImageBitmap( blob );\n\n\t\t\t} else {\n\n\t\t\t\treturn createImageBitmap( blob, scope.options );\n\n\t\t\t}\n\n\t\t} ).then( function ( imageBitmap ) {\n\n\t\t\tCache.add( url, imageBitmap );\n\n\t\t\tif ( onLoad ) onLoad( imageBitmap );\n\n\t\t\tscope.manager.itemEnd( url );\n\n\t\t} ).catch( function ( e ) {\n\n\t\t\tif ( onError ) onError( e );\n\n\t\t\tscope.manager.itemError( url );\n\t\t\tscope.manager.itemEnd( url );\n\n\t\t} );\n\n\t\tscope.manager.itemStart( url );\n\n\t}\n\n} );\n\n/**\n * @author zz85 / http://www.lab4games.net/zz85/blog\n * minimal class for proxing functions to Path. Replaces old \"extractSubpaths()\"\n **/\n\nfunction ShapePath() {\n\n\tthis.type = 'ShapePath';\n\n\tthis.color = new Color();\n\n\tthis.subPaths = [];\n\tthis.currentPath = null;\n\n}\n\nObject.assign( ShapePath.prototype, {\n\n\tmoveTo: function ( x, y ) {\n\n\t\tthis.currentPath = new Path();\n\t\tthis.subPaths.push( this.currentPath );\n\t\tthis.currentPath.moveTo( x, y );\n\n\t\treturn this;\n\n\t},\n\n\tlineTo: function ( x, y ) {\n\n\t\tthis.currentPath.lineTo( x, y );\n\n\t\treturn this;\n\n\t},\n\n\tquadraticCurveTo: function ( aCPx, aCPy, aX, aY ) {\n\n\t\tthis.currentPath.quadraticCurveTo( aCPx, aCPy, aX, aY );\n\n\t\treturn this;\n\n\t},\n\n\tbezierCurveTo: function ( aCP1x, aCP1y, aCP2x, aCP2y, aX, aY ) {\n\n\t\tthis.currentPath.bezierCurveTo( aCP1x, aCP1y, aCP2x, aCP2y, aX, aY );\n\n\t\treturn this;\n\n\t},\n\n\tsplineThru: function ( pts ) {\n\n\t\tthis.currentPath.splineThru( pts );\n\n\t\treturn this;\n\n\t},\n\n\ttoShapes: function ( isCCW, noHoles ) {\n\n\t\tfunction toShapesNoHoles( inSubpaths ) {\n\n\t\t\tvar shapes = [];\n\n\t\t\tfor ( var i = 0, l = inSubpaths.length; i < l; i ++ ) {\n\n\t\t\t\tvar tmpPath = inSubpaths[ i ];\n\n\t\t\t\tvar tmpShape = new Shape();\n\t\t\t\ttmpShape.curves = tmpPath.curves;\n\n\t\t\t\tshapes.push( tmpShape );\n\n\t\t\t}\n\n\t\t\treturn shapes;\n\n\t\t}\n\n\t\tfunction isPointInsidePolygon( inPt, inPolygon ) {\n\n\t\t\tvar polyLen = inPolygon.length;\n\n\t\t\t// inPt on polygon contour => immediate success    or\n\t\t\t// toggling of inside/outside at every single! intersection point of an edge\n\t\t\t//  with the horizontal line through inPt, left of inPt\n\t\t\t//  not counting lowerY endpoints of edges and whole edges on that line\n\t\t\tvar inside = false;\n\t\t\tfor ( var p = polyLen - 1, q = 0; q < polyLen; p = q ++ ) {\n\n\t\t\t\tvar edgeLowPt = inPolygon[ p ];\n\t\t\t\tvar edgeHighPt = inPolygon[ q ];\n\n\t\t\t\tvar edgeDx = edgeHighPt.x - edgeLowPt.x;\n\t\t\t\tvar edgeDy = edgeHighPt.y - edgeLowPt.y;\n\n\t\t\t\tif ( Math.abs( edgeDy ) > Number.EPSILON ) {\n\n\t\t\t\t\t// not parallel\n\t\t\t\t\tif ( edgeDy < 0 ) {\n\n\t\t\t\t\t\tedgeLowPt = inPolygon[ q ]; edgeDx = - edgeDx;\n\t\t\t\t\t\tedgeHighPt = inPolygon[ p ]; edgeDy = - edgeDy;\n\n\t\t\t\t\t}\n\t\t\t\t\tif ( ( inPt.y < edgeLowPt.y ) || ( inPt.y > edgeHighPt.y ) ) \t\tcontinue;\n\n\t\t\t\t\tif ( inPt.y === edgeLowPt.y ) {\n\n\t\t\t\t\t\tif ( inPt.x === edgeLowPt.x )\t\treturn\ttrue;\t\t// inPt is on contour ?\n\t\t\t\t\t\t// continue;\t\t\t\t// no intersection or edgeLowPt => doesn't count !!!\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\tvar perpEdge = edgeDy * ( inPt.x - edgeLowPt.x ) - edgeDx * ( inPt.y - edgeLowPt.y );\n\t\t\t\t\t\tif ( perpEdge === 0 )\t\t\t\treturn\ttrue;\t\t// inPt is on contour ?\n\t\t\t\t\t\tif ( perpEdge < 0 ) \t\t\t\tcontinue;\n\t\t\t\t\t\tinside = ! inside;\t\t// true intersection left of inPt\n\n\t\t\t\t\t}\n\n\t\t\t\t} else {\n\n\t\t\t\t\t// parallel or collinear\n\t\t\t\t\tif ( inPt.y !== edgeLowPt.y ) \t\tcontinue;\t\t\t// parallel\n\t\t\t\t\t// edge lies on the same horizontal line as inPt\n\t\t\t\t\tif ( ( ( edgeHighPt.x <= inPt.x ) && ( inPt.x <= edgeLowPt.x ) ) ||\n\t\t\t\t\t\t ( ( edgeLowPt.x <= inPt.x ) && ( inPt.x <= edgeHighPt.x ) ) )\t\treturn\ttrue;\t// inPt: Point on contour !\n\t\t\t\t\t// continue;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\treturn\tinside;\n\n\t\t}\n\n\t\tvar isClockWise = ShapeUtils.isClockWise;\n\n\t\tvar subPaths = this.subPaths;\n\t\tif ( subPaths.length === 0 ) return [];\n\n\t\tif ( noHoles === true )\treturn\ttoShapesNoHoles( subPaths );\n\n\n\t\tvar solid, tmpPath, tmpShape, shapes = [];\n\n\t\tif ( subPaths.length === 1 ) {\n\n\t\t\ttmpPath = subPaths[ 0 ];\n\t\t\ttmpShape = new Shape();\n\t\t\ttmpShape.curves = tmpPath.curves;\n\t\t\tshapes.push( tmpShape );\n\t\t\treturn shapes;\n\n\t\t}\n\n\t\tvar holesFirst = ! isClockWise( subPaths[ 0 ].getPoints() );\n\t\tholesFirst = isCCW ? ! holesFirst : holesFirst;\n\n\t\t// console.log(\"Holes first\", holesFirst);\n\n\t\tvar betterShapeHoles = [];\n\t\tvar newShapes = [];\n\t\tvar newShapeHoles = [];\n\t\tvar mainIdx = 0;\n\t\tvar tmpPoints;\n\n\t\tnewShapes[ mainIdx ] = undefined;\n\t\tnewShapeHoles[ mainIdx ] = [];\n\n\t\tfor ( var i = 0, l = subPaths.length; i < l; i ++ ) {\n\n\t\t\ttmpPath = subPaths[ i ];\n\t\t\ttmpPoints = tmpPath.getPoints();\n\t\t\tsolid = isClockWise( tmpPoints );\n\t\t\tsolid = isCCW ? ! solid : solid;\n\n\t\t\tif ( solid ) {\n\n\t\t\t\tif ( ( ! holesFirst ) && ( newShapes[ mainIdx ] ) )\tmainIdx ++;\n\n\t\t\t\tnewShapes[ mainIdx ] = { s: new Shape(), p: tmpPoints };\n\t\t\t\tnewShapes[ mainIdx ].s.curves = tmpPath.curves;\n\n\t\t\t\tif ( holesFirst )\tmainIdx ++;\n\t\t\t\tnewShapeHoles[ mainIdx ] = [];\n\n\t\t\t\t//console.log('cw', i);\n\n\t\t\t} else {\n\n\t\t\t\tnewShapeHoles[ mainIdx ].push( { h: tmpPath, p: tmpPoints[ 0 ] } );\n\n\t\t\t\t//console.log('ccw', i);\n\n\t\t\t}\n\n\t\t}\n\n\t\t// only Holes? -> probably all Shapes with wrong orientation\n\t\tif ( ! newShapes[ 0 ] )\treturn\ttoShapesNoHoles( subPaths );\n\n\n\t\tif ( newShapes.length > 1 ) {\n\n\t\t\tvar ambiguous = false;\n\t\t\tvar toChange = [];\n\n\t\t\tfor ( var sIdx = 0, sLen = newShapes.length; sIdx < sLen; sIdx ++ ) {\n\n\t\t\t\tbetterShapeHoles[ sIdx ] = [];\n\n\t\t\t}\n\n\t\t\tfor ( var sIdx = 0, sLen = newShapes.length; sIdx < sLen; sIdx ++ ) {\n\n\t\t\t\tvar sho = newShapeHoles[ sIdx ];\n\n\t\t\t\tfor ( var hIdx = 0; hIdx < sho.length; hIdx ++ ) {\n\n\t\t\t\t\tvar ho = sho[ hIdx ];\n\t\t\t\t\tvar hole_unassigned = true;\n\n\t\t\t\t\tfor ( var s2Idx = 0; s2Idx < newShapes.length; s2Idx ++ ) {\n\n\t\t\t\t\t\tif ( isPointInsidePolygon( ho.p, newShapes[ s2Idx ].p ) ) {\n\n\t\t\t\t\t\t\tif ( sIdx !== s2Idx )\ttoChange.push( { froms: sIdx, tos: s2Idx, hole: hIdx } );\n\t\t\t\t\t\t\tif ( hole_unassigned ) {\n\n\t\t\t\t\t\t\t\thole_unassigned = false;\n\t\t\t\t\t\t\t\tbetterShapeHoles[ s2Idx ].push( ho );\n\n\t\t\t\t\t\t\t} else {\n\n\t\t\t\t\t\t\t\tambiguous = true;\n\n\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\t\t\t\t\tif ( hole_unassigned ) {\n\n\t\t\t\t\t\tbetterShapeHoles[ sIdx ].push( ho );\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\t\t\t// console.log(\"ambiguous: \", ambiguous);\n\t\t\tif ( toChange.length > 0 ) {\n\n\t\t\t\t// console.log(\"to change: \", toChange);\n\t\t\t\tif ( ! ambiguous )\tnewShapeHoles = betterShapeHoles;\n\n\t\t\t}\n\n\t\t}\n\n\t\tvar tmpHoles;\n\n\t\tfor ( var i = 0, il = newShapes.length; i < il; i ++ ) {\n\n\t\t\ttmpShape = newShapes[ i ].s;\n\t\t\tshapes.push( tmpShape );\n\t\t\ttmpHoles = newShapeHoles[ i ];\n\n\t\t\tfor ( var j = 0, jl = tmpHoles.length; j < jl; j ++ ) {\n\n\t\t\t\ttmpShape.holes.push( tmpHoles[ j ].h );\n\n\t\t\t}\n\n\t\t}\n\n\t\t//console.log(\"shape\", shapes);\n\n\t\treturn shapes;\n\n\t}\n\n} );\n\n/**\n * @author zz85 / http://www.lab4games.net/zz85/blog\n * @author mrdoob / http://mrdoob.com/\n */\n\n\nfunction Font( data ) {\n\n\tthis.type = 'Font';\n\n\tthis.data = data;\n\n}\n\nObject.assign( Font.prototype, {\n\n\tisFont: true,\n\n\tgenerateShapes: function ( text, size ) {\n\n\t\tif ( size === undefined ) size = 100;\n\n\t\tvar shapes = [];\n\t\tvar paths = createPaths( text, size, this.data );\n\n\t\tfor ( var p = 0, pl = paths.length; p < pl; p ++ ) {\n\n\t\t\tArray.prototype.push.apply( shapes, paths[ p ].toShapes() );\n\n\t\t}\n\n\t\treturn shapes;\n\n\t}\n\n} );\n\nfunction createPaths( text, size, data ) {\n\n\tvar chars = Array.from ? Array.from( text ) : String( text ).split( '' ); // workaround for IE11, see #13988\n\tvar scale = size / data.resolution;\n\tvar line_height = ( data.boundingBox.yMax - data.boundingBox.yMin + data.underlineThickness ) * scale;\n\n\tvar paths = [];\n\n\tvar offsetX = 0, offsetY = 0;\n\n\tfor ( var i = 0; i < chars.length; i ++ ) {\n\n\t\tvar char = chars[ i ];\n\n\t\tif ( char === '\\n' ) {\n\n\t\t\toffsetX = 0;\n\t\t\toffsetY -= line_height;\n\n\t\t} else {\n\n\t\t\tvar ret = createPath( char, scale, offsetX, offsetY, data );\n\t\t\toffsetX += ret.offsetX;\n\t\t\tpaths.push( ret.path );\n\n\t\t}\n\n\t}\n\n\treturn paths;\n\n}\n\nfunction createPath( char, scale, offsetX, offsetY, data ) {\n\n\tvar glyph = data.glyphs[ char ] || data.glyphs[ '?' ];\n\n\tif ( ! glyph ) {\n\n\t\tconsole.error( 'THREE.Font: character \"' + char + '\" does not exists in font family ' + data.familyName + '.' );\n\n\t\treturn;\n\n\t}\n\n\tvar path = new ShapePath();\n\n\tvar x, y, cpx, cpy, cpx1, cpy1, cpx2, cpy2;\n\n\tif ( glyph.o ) {\n\n\t\tvar outline = glyph._cachedOutline || ( glyph._cachedOutline = glyph.o.split( ' ' ) );\n\n\t\tfor ( var i = 0, l = outline.length; i < l; ) {\n\n\t\t\tvar action = outline[ i ++ ];\n\n\t\t\tswitch ( action ) {\n\n\t\t\t\tcase 'm': // moveTo\n\n\t\t\t\t\tx = outline[ i ++ ] * scale + offsetX;\n\t\t\t\t\ty = outline[ i ++ ] * scale + offsetY;\n\n\t\t\t\t\tpath.moveTo( x, y );\n\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase 'l': // lineTo\n\n\t\t\t\t\tx = outline[ i ++ ] * scale + offsetX;\n\t\t\t\t\ty = outline[ i ++ ] * scale + offsetY;\n\n\t\t\t\t\tpath.lineTo( x, y );\n\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase 'q': // quadraticCurveTo\n\n\t\t\t\t\tcpx = outline[ i ++ ] * scale + offsetX;\n\t\t\t\t\tcpy = outline[ i ++ ] * scale + offsetY;\n\t\t\t\t\tcpx1 = outline[ i ++ ] * scale + offsetX;\n\t\t\t\t\tcpy1 = outline[ i ++ ] * scale + offsetY;\n\n\t\t\t\t\tpath.quadraticCurveTo( cpx1, cpy1, cpx, cpy );\n\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase 'b': // bezierCurveTo\n\n\t\t\t\t\tcpx = outline[ i ++ ] * scale + offsetX;\n\t\t\t\t\tcpy = outline[ i ++ ] * scale + offsetY;\n\t\t\t\t\tcpx1 = outline[ i ++ ] * scale + offsetX;\n\t\t\t\t\tcpy1 = outline[ i ++ ] * scale + offsetY;\n\t\t\t\t\tcpx2 = outline[ i ++ ] * scale + offsetX;\n\t\t\t\t\tcpy2 = outline[ i ++ ] * scale + offsetY;\n\n\t\t\t\t\tpath.bezierCurveTo( cpx1, cpy1, cpx2, cpy2, cpx, cpy );\n\n\t\t\t\t\tbreak;\n\n\t\t\t}\n\n\t\t}\n\n\t}\n\n\treturn { offsetX: glyph.ha * scale, path: path };\n\n}\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction FontLoader( manager ) {\n\n\tLoader.call( this, manager );\n\n}\n\nFontLoader.prototype = Object.assign( Object.create( Loader.prototype ), {\n\n\tconstructor: FontLoader,\n\n\tload: function ( url, onLoad, onProgress, onError ) {\n\n\t\tvar scope = this;\n\n\t\tvar loader = new FileLoader( this.manager );\n\t\tloader.setPath( this.path );\n\t\tloader.load( url, function ( text ) {\n\n\t\t\tvar json;\n\n\t\t\ttry {\n\n\t\t\t\tjson = JSON.parse( text );\n\n\t\t\t} catch ( e ) {\n\n\t\t\t\tconsole.warn( 'THREE.FontLoader: typeface.js support is being deprecated. Use typeface.json instead.' );\n\t\t\t\tjson = JSON.parse( text.substring( 65, text.length - 2 ) );\n\n\t\t\t}\n\n\t\t\tvar font = scope.parse( json );\n\n\t\t\tif ( onLoad ) onLoad( font );\n\n\t\t}, onProgress, onError );\n\n\t},\n\n\tparse: function ( json ) {\n\n\t\treturn new Font( json );\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nvar _context;\n\nvar AudioContext = {\n\n\tgetContext: function () {\n\n\t\tif ( _context === undefined ) {\n\n\t\t\t_context = new ( window.AudioContext || window.webkitAudioContext )();\n\n\t\t}\n\n\t\treturn _context;\n\n\t},\n\n\tsetContext: function ( value ) {\n\n\t\t_context = value;\n\n\t}\n\n};\n\n/**\n * @author Reece Aaron Lecrivain / http://reecenotes.com/\n */\n\nfunction AudioLoader( manager ) {\n\n\tLoader.call( this, manager );\n\n}\n\nAudioLoader.prototype = Object.assign( Object.create( Loader.prototype ), {\n\n\tconstructor: AudioLoader,\n\n\tload: function ( url, onLoad, onProgress, onError ) {\n\n\t\tvar loader = new FileLoader( this.manager );\n\t\tloader.setResponseType( 'arraybuffer' );\n\t\tloader.setPath( this.path );\n\t\tloader.load( url, function ( buffer ) {\n\n\t\t\t// Create a copy of the buffer. The `decodeAudioData` method\n\t\t\t// detaches the buffer when complete, preventing reuse.\n\t\t\tvar bufferCopy = buffer.slice( 0 );\n\n\t\t\tvar context = AudioContext.getContext();\n\t\t\tcontext.decodeAudioData( bufferCopy, function ( audioBuffer ) {\n\n\t\t\t\tonLoad( audioBuffer );\n\n\t\t\t} );\n\n\t\t}, onProgress, onError );\n\n\t}\n\n} );\n\n/**\n * @author bhouston / http://clara.io\n * @author WestLangley / http://github.com/WestLangley\n *\n * Primary reference:\n *   https://graphics.stanford.edu/papers/envmap/envmap.pdf\n *\n * Secondary reference:\n *   https://www.ppsloan.org/publications/StupidSH36.pdf\n */\n\n// 3-band SH defined by 9 coefficients\n\nfunction SphericalHarmonics3() {\n\n\tthis.coefficients = [];\n\n\tfor ( var i = 0; i < 9; i ++ ) {\n\n\t\tthis.coefficients.push( new Vector3() );\n\n\t}\n\n}\n\nObject.assign( SphericalHarmonics3.prototype, {\n\n\tisSphericalHarmonics3: true,\n\n\tset: function ( coefficients ) {\n\n\t\tfor ( var i = 0; i < 9; i ++ ) {\n\n\t\t\tthis.coefficients[ i ].copy( coefficients[ i ] );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tzero: function () {\n\n\t\tfor ( var i = 0; i < 9; i ++ ) {\n\n\t\t\tthis.coefficients[ i ].set( 0, 0, 0 );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\t// get the radiance in the direction of the normal\n\t// target is a Vector3\n\tgetAt: function ( normal, target ) {\n\n\t\t// normal is assumed to be unit length\n\n\t\tvar x = normal.x, y = normal.y, z = normal.z;\n\n\t\tvar coeff = this.coefficients;\n\n\t\t// band 0\n\t\ttarget.copy( coeff[ 0 ] ).multiplyScalar( 0.282095 );\n\n\t\t// band 1\n\t\ttarget.addScale( coeff[ 1 ], 0.488603 * y );\n\t\ttarget.addScale( coeff[ 2 ], 0.488603 * z );\n\t\ttarget.addScale( coeff[ 3 ], 0.488603 * x );\n\n\t\t// band 2\n\t\ttarget.addScale( coeff[ 4 ], 1.092548 * ( x * y ) );\n\t\ttarget.addScale( coeff[ 5 ], 1.092548 * ( y * z ) );\n\t\ttarget.addScale( coeff[ 6 ], 0.315392 * ( 3.0 * z * z - 1.0 ) );\n\t\ttarget.addScale( coeff[ 7 ], 1.092548 * ( x * z ) );\n\t\ttarget.addScale( coeff[ 8 ], 0.546274 * ( x * x - y * y ) );\n\n\t\treturn target;\n\n\t},\n\n\t// get the irradiance (radiance convolved with cosine lobe) in the direction of the normal\n\t// target is a Vector3\n\t// https://graphics.stanford.edu/papers/envmap/envmap.pdf\n\tgetIrradianceAt: function ( normal, target ) {\n\n\t\t// normal is assumed to be unit length\n\n\t\tvar x = normal.x, y = normal.y, z = normal.z;\n\n\t\tvar coeff = this.coefficients;\n\n\t\t// band 0\n\t\ttarget.copy( coeff[ 0 ] ).multiplyScalar( 0.886227 ); // π * 0.282095\n\n\t\t// band 1\n\t\ttarget.addScale( coeff[ 1 ], 2.0 * 0.511664 * y ); // ( 2 * π / 3 ) * 0.488603\n\t\ttarget.addScale( coeff[ 2 ], 2.0 * 0.511664 * z );\n\t\ttarget.addScale( coeff[ 3 ], 2.0 * 0.511664 * x );\n\n\t\t// band 2\n\t\ttarget.addScale( coeff[ 4 ], 2.0 * 0.429043 * x * y ); // ( π / 4 ) * 1.092548\n\t\ttarget.addScale( coeff[ 5 ], 2.0 * 0.429043 * y * z );\n\t\ttarget.addScale( coeff[ 6 ], 0.743125 * z * z - 0.247708 ); // ( π / 4 ) * 0.315392 * 3\n\t\ttarget.addScale( coeff[ 7 ], 2.0 * 0.429043 * x * z );\n\t\ttarget.addScale( coeff[ 8 ], 0.429043 * ( x * x - y * y ) ); // ( π / 4 ) * 0.546274\n\n\t\treturn target;\n\n\t},\n\n\tadd: function ( sh ) {\n\n\t\tfor ( var i = 0; i < 9; i ++ ) {\n\n\t\t\tthis.coefficients[ i ].add( sh.coefficients[ i ] );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\n\tscale: function ( s ) {\n\n\t\tfor ( var i = 0; i < 9; i ++ ) {\n\n\t\t\tthis.coefficients[ i ].multiplyScalar( s );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tlerp: function ( sh, alpha ) {\n\n\t\tfor ( var i = 0; i < 9; i ++ ) {\n\n\t\t\tthis.coefficients[ i ].lerp( sh.coefficients[ i ], alpha );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tequals: function ( sh ) {\n\n\t\tfor ( var i = 0; i < 9; i ++ ) {\n\n\t\t\tif ( ! this.coefficients[ i ].equals( sh.coefficients[ i ] ) ) {\n\n\t\t\t\treturn false;\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn true;\n\n\t},\n\n\tcopy: function ( sh ) {\n\n\t\treturn this.set( sh.coefficients );\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor().copy( this );\n\n\t},\n\n\tfromArray: function ( array, offset ) {\n\n\t\tif ( offset === undefined ) offset = 0;\n\n\t\tvar coefficients = this.coefficients;\n\n\t\tfor ( var i = 0; i < 9; i ++ ) {\n\n\t\t\tcoefficients[ i ].fromArray( array, offset + ( i * 3 ) );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\ttoArray: function ( array, offset ) {\n\n\t\tif ( array === undefined ) array = [];\n\t\tif ( offset === undefined ) offset = 0;\n\n\t\tvar coefficients = this.coefficients;\n\n\t\tfor ( var i = 0; i < 9; i ++ ) {\n\n\t\t\tcoefficients[ i ].toArray( array, offset + ( i * 3 ) );\n\n\t\t}\n\n\t\treturn array;\n\n\t}\n\n} );\n\nObject.assign( SphericalHarmonics3, {\n\n\t// evaluate the basis functions\n\t// shBasis is an Array[ 9 ]\n\tgetBasisAt: function ( normal, shBasis ) {\n\n\t\t// normal is assumed to be unit length\n\n\t\tvar x = normal.x, y = normal.y, z = normal.z;\n\n\t\t// band 0\n\t\tshBasis[ 0 ] = 0.282095;\n\n\t\t// band 1\n\t\tshBasis[ 1 ] = 0.488603 * y;\n\t\tshBasis[ 2 ] = 0.488603 * z;\n\t\tshBasis[ 3 ] = 0.488603 * x;\n\n\t\t// band 2\n\t\tshBasis[ 4 ] = 1.092548 * x * y;\n\t\tshBasis[ 5 ] = 1.092548 * y * z;\n\t\tshBasis[ 6 ] = 0.315392 * ( 3 * z * z - 1 );\n\t\tshBasis[ 7 ] = 1.092548 * x * z;\n\t\tshBasis[ 8 ] = 0.546274 * ( x * x - y * y );\n\n\t}\n\n} );\n\n/**\n * @author WestLangley / http://github.com/WestLangley\n *\n * A LightProbe is a source of indirect-diffuse light\n */\n\nfunction LightProbe( sh, intensity ) {\n\n\tLight.call( this, undefined, intensity );\n\n\tthis.sh = ( sh !== undefined ) ? sh : new SphericalHarmonics3();\n\n}\n\nLightProbe.prototype = Object.assign( Object.create( Light.prototype ), {\n\n\tconstructor: LightProbe,\n\n\tisLightProbe: true,\n\n\tcopy: function ( source ) {\n\n\t\tLight.prototype.copy.call( this, source );\n\n\t\tthis.sh.copy( source.sh );\n\t\tthis.intensity = source.intensity;\n\n\t\treturn this;\n\n\t},\n\n\ttoJSON: function ( meta ) {\n\n\t\tvar data = Light.prototype.toJSON.call( this, meta );\n\n\t\t// data.sh = this.sh.toArray(); // todo\n\n\t\treturn data;\n\n\t}\n\n} );\n\n/**\n * @author WestLangley / http://github.com/WestLangley\n */\n\nfunction HemisphereLightProbe( skyColor, groundColor, intensity ) {\n\n\tLightProbe.call( this, undefined, intensity );\n\n\tvar color1 = new Color().set( skyColor );\n\tvar color2 = new Color().set( groundColor );\n\n\tvar sky = new Vector3( color1.r, color1.g, color1.b );\n\tvar ground = new Vector3( color2.r, color2.g, color2.b );\n\n\t// without extra factor of PI in the shader, should = 1 / Math.sqrt( Math.PI );\n\tvar c0 = Math.sqrt( Math.PI );\n\tvar c1 = c0 * Math.sqrt( 0.75 );\n\n\tthis.sh.coefficients[ 0 ].copy( sky ).add( ground ).multiplyScalar( c0 );\n\tthis.sh.coefficients[ 1 ].copy( sky ).sub( ground ).multiplyScalar( c1 );\n\n}\n\nHemisphereLightProbe.prototype = Object.assign( Object.create( LightProbe.prototype ), {\n\n\tconstructor: HemisphereLightProbe,\n\n\tisHemisphereLightProbe: true,\n\n\tcopy: function ( source ) { // modifying colors not currently supported\n\n\t\tLightProbe.prototype.copy.call( this, source );\n\n\t\treturn this;\n\n\t},\n\n\ttoJSON: function ( meta ) {\n\n\t\tvar data = LightProbe.prototype.toJSON.call( this, meta );\n\n\t\t// data.sh = this.sh.toArray(); // todo\n\n\t\treturn data;\n\n\t}\n\n} );\n\n/**\n * @author WestLangley / http://github.com/WestLangley\n */\n\nfunction AmbientLightProbe( color, intensity ) {\n\n\tLightProbe.call( this, undefined, intensity );\n\n\tvar color1 = new Color().set( color );\n\n\t// without extra factor of PI in the shader, would be 2 / Math.sqrt( Math.PI );\n\tthis.sh.coefficients[ 0 ].set( color1.r, color1.g, color1.b ).multiplyScalar( 2 * Math.sqrt( Math.PI ) );\n\n}\n\nAmbientLightProbe.prototype = Object.assign( Object.create( LightProbe.prototype ), {\n\n\tconstructor: AmbientLightProbe,\n\n\tisAmbientLightProbe: true,\n\n\tcopy: function ( source ) { // modifying color not currently supported\n\n\t\tLightProbe.prototype.copy.call( this, source );\n\n\t\treturn this;\n\n\t},\n\n\ttoJSON: function ( meta ) {\n\n\t\tvar data = LightProbe.prototype.toJSON.call( this, meta );\n\n\t\t// data.sh = this.sh.toArray(); // todo\n\n\t\treturn data;\n\n\t}\n\n} );\n\nvar _eyeRight = new Matrix4();\nvar _eyeLeft = new Matrix4();\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction StereoCamera() {\n\n\tthis.type = 'StereoCamera';\n\n\tthis.aspect = 1;\n\n\tthis.eyeSep = 0.064;\n\n\tthis.cameraL = new PerspectiveCamera();\n\tthis.cameraL.layers.enable( 1 );\n\tthis.cameraL.matrixAutoUpdate = false;\n\n\tthis.cameraR = new PerspectiveCamera();\n\tthis.cameraR.layers.enable( 2 );\n\tthis.cameraR.matrixAutoUpdate = false;\n\n\tthis._cache = {\n\t\tfocus: null,\n\t\tfov: null,\n\t\taspect: null,\n\t\tnear: null,\n\t\tfar: null,\n\t\tzoom: null,\n\t\teyeSep: null\n\t};\n\n}\n\nObject.assign( StereoCamera.prototype, {\n\n\tupdate: function ( camera ) {\n\n\t\tvar cache = this._cache;\n\n\t\tvar needsUpdate = cache.focus !== camera.focus || cache.fov !== camera.fov ||\n\t\t\tcache.aspect !== camera.aspect * this.aspect || cache.near !== camera.near ||\n\t\t\tcache.far !== camera.far || cache.zoom !== camera.zoom || cache.eyeSep !== this.eyeSep;\n\n\t\tif ( needsUpdate ) {\n\n\t\t\tcache.focus = camera.focus;\n\t\t\tcache.fov = camera.fov;\n\t\t\tcache.aspect = camera.aspect * this.aspect;\n\t\t\tcache.near = camera.near;\n\t\t\tcache.far = camera.far;\n\t\t\tcache.zoom = camera.zoom;\n\t\t\tcache.eyeSep = this.eyeSep;\n\n\t\t\t// Off-axis stereoscopic effect based on\n\t\t\t// http://paulbourke.net/stereographics/stereorender/\n\n\t\t\tvar projectionMatrix = camera.projectionMatrix.clone();\n\t\t\tvar eyeSepHalf = cache.eyeSep / 2;\n\t\t\tvar eyeSepOnProjection = eyeSepHalf * cache.near / cache.focus;\n\t\t\tvar ymax = ( cache.near * Math.tan( MathUtils.DEG2RAD * cache.fov * 0.5 ) ) / cache.zoom;\n\t\t\tvar xmin, xmax;\n\n\t\t\t// translate xOffset\n\n\t\t\t_eyeLeft.elements[ 12 ] = - eyeSepHalf;\n\t\t\t_eyeRight.elements[ 12 ] = eyeSepHalf;\n\n\t\t\t// for left eye\n\n\t\t\txmin = - ymax * cache.aspect + eyeSepOnProjection;\n\t\t\txmax = ymax * cache.aspect + eyeSepOnProjection;\n\n\t\t\tprojectionMatrix.elements[ 0 ] = 2 * cache.near / ( xmax - xmin );\n\t\t\tprojectionMatrix.elements[ 8 ] = ( xmax + xmin ) / ( xmax - xmin );\n\n\t\t\tthis.cameraL.projectionMatrix.copy( projectionMatrix );\n\n\t\t\t// for right eye\n\n\t\t\txmin = - ymax * cache.aspect - eyeSepOnProjection;\n\t\t\txmax = ymax * cache.aspect - eyeSepOnProjection;\n\n\t\t\tprojectionMatrix.elements[ 0 ] = 2 * cache.near / ( xmax - xmin );\n\t\t\tprojectionMatrix.elements[ 8 ] = ( xmax + xmin ) / ( xmax - xmin );\n\n\t\t\tthis.cameraR.projectionMatrix.copy( projectionMatrix );\n\n\t\t}\n\n\t\tthis.cameraL.matrixWorld.copy( camera.matrixWorld ).multiply( _eyeLeft );\n\t\tthis.cameraR.matrixWorld.copy( camera.matrixWorld ).multiply( _eyeRight );\n\n\t}\n\n} );\n\n/**\n * @author alteredq / http://alteredqualia.com/\n */\n\nfunction Clock( autoStart ) {\n\n\tthis.autoStart = ( autoStart !== undefined ) ? autoStart : true;\n\n\tthis.startTime = 0;\n\tthis.oldTime = 0;\n\tthis.elapsedTime = 0;\n\n\tthis.running = false;\n\n}\n\nObject.assign( Clock.prototype, {\n\n\tstart: function () {\n\n\t\tthis.startTime = ( typeof performance === 'undefined' ? Date : performance ).now(); // see #10732\n\n\t\tthis.oldTime = this.startTime;\n\t\tthis.elapsedTime = 0;\n\t\tthis.running = true;\n\n\t},\n\n\tstop: function () {\n\n\t\tthis.getElapsedTime();\n\t\tthis.running = false;\n\t\tthis.autoStart = false;\n\n\t},\n\n\tgetElapsedTime: function () {\n\n\t\tthis.getDelta();\n\t\treturn this.elapsedTime;\n\n\t},\n\n\tgetDelta: function () {\n\n\t\tvar diff = 0;\n\n\t\tif ( this.autoStart && ! this.running ) {\n\n\t\t\tthis.start();\n\t\t\treturn 0;\n\n\t\t}\n\n\t\tif ( this.running ) {\n\n\t\t\tvar newTime = ( typeof performance === 'undefined' ? Date : performance ).now();\n\n\t\t\tdiff = ( newTime - this.oldTime ) / 1000;\n\t\t\tthis.oldTime = newTime;\n\n\t\t\tthis.elapsedTime += diff;\n\n\t\t}\n\n\t\treturn diff;\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nvar _position$2 = new Vector3();\nvar _quaternion$3 = new Quaternion();\nvar _scale$1 = new Vector3();\nvar _orientation = new Vector3();\n\nfunction AudioListener() {\n\n\tObject3D.call( this );\n\n\tthis.type = 'AudioListener';\n\n\tthis.context = AudioContext.getContext();\n\n\tthis.gain = this.context.createGain();\n\tthis.gain.connect( this.context.destination );\n\n\tthis.filter = null;\n\n\tthis.timeDelta = 0;\n\n\t// private\n\n\tthis._clock = new Clock();\n\n}\n\nAudioListener.prototype = Object.assign( Object.create( Object3D.prototype ), {\n\n\tconstructor: AudioListener,\n\n\tgetInput: function () {\n\n\t\treturn this.gain;\n\n\t},\n\n\tremoveFilter: function ( ) {\n\n\t\tif ( this.filter !== null ) {\n\n\t\t\tthis.gain.disconnect( this.filter );\n\t\t\tthis.filter.disconnect( this.context.destination );\n\t\t\tthis.gain.connect( this.context.destination );\n\t\t\tthis.filter = null;\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tgetFilter: function () {\n\n\t\treturn this.filter;\n\n\t},\n\n\tsetFilter: function ( value ) {\n\n\t\tif ( this.filter !== null ) {\n\n\t\t\tthis.gain.disconnect( this.filter );\n\t\t\tthis.filter.disconnect( this.context.destination );\n\n\t\t} else {\n\n\t\t\tthis.gain.disconnect( this.context.destination );\n\n\t\t}\n\n\t\tthis.filter = value;\n\t\tthis.gain.connect( this.filter );\n\t\tthis.filter.connect( this.context.destination );\n\n\t\treturn this;\n\n\t},\n\n\tgetMasterVolume: function () {\n\n\t\treturn this.gain.gain.value;\n\n\t},\n\n\tsetMasterVolume: function ( value ) {\n\n\t\tthis.gain.gain.setTargetAtTime( value, this.context.currentTime, 0.01 );\n\n\t\treturn this;\n\n\t},\n\n\tupdateMatrixWorld: function ( force ) {\n\n\t\tObject3D.prototype.updateMatrixWorld.call( this, force );\n\n\t\tvar listener = this.context.listener;\n\t\tvar up = this.up;\n\n\t\tthis.timeDelta = this._clock.getDelta();\n\n\t\tthis.matrixWorld.decompose( _position$2, _quaternion$3, _scale$1 );\n\n\t\t_orientation.set( 0, 0, - 1 ).applyQuaternion( _quaternion$3 );\n\n\t\tif ( listener.positionX ) {\n\n\t\t\t// code path for Chrome (see #14393)\n\n\t\t\tvar endTime = this.context.currentTime + this.timeDelta;\n\n\t\t\tlistener.positionX.linearRampToValueAtTime( _position$2.x, endTime );\n\t\t\tlistener.positionY.linearRampToValueAtTime( _position$2.y, endTime );\n\t\t\tlistener.positionZ.linearRampToValueAtTime( _position$2.z, endTime );\n\t\t\tlistener.forwardX.linearRampToValueAtTime( _orientation.x, endTime );\n\t\t\tlistener.forwardY.linearRampToValueAtTime( _orientation.y, endTime );\n\t\t\tlistener.forwardZ.linearRampToValueAtTime( _orientation.z, endTime );\n\t\t\tlistener.upX.linearRampToValueAtTime( up.x, endTime );\n\t\t\tlistener.upY.linearRampToValueAtTime( up.y, endTime );\n\t\t\tlistener.upZ.linearRampToValueAtTime( up.z, endTime );\n\n\t\t} else {\n\n\t\t\tlistener.setPosition( _position$2.x, _position$2.y, _position$2.z );\n\t\t\tlistener.setOrientation( _orientation.x, _orientation.y, _orientation.z, up.x, up.y, up.z );\n\n\t\t}\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author Reece Aaron Lecrivain / http://reecenotes.com/\n */\n\nfunction Audio( listener ) {\n\n\tObject3D.call( this );\n\n\tthis.type = 'Audio';\n\n\tthis.listener = listener;\n\tthis.context = listener.context;\n\n\tthis.gain = this.context.createGain();\n\tthis.gain.connect( listener.getInput() );\n\n\tthis.autoplay = false;\n\n\tthis.buffer = null;\n\tthis.detune = 0;\n\tthis.loop = false;\n\tthis.loopStart = 0;\n\tthis.loopEnd = 0;\n\tthis.offset = 0;\n\tthis.duration = undefined;\n\tthis.playbackRate = 1;\n\tthis.isPlaying = false;\n\tthis.hasPlaybackControl = true;\n\tthis.sourceType = 'empty';\n\n\tthis._startedAt = 0;\n\tthis._pausedAt = 0;\n\n\tthis.filters = [];\n\n}\n\nAudio.prototype = Object.assign( Object.create( Object3D.prototype ), {\n\n\tconstructor: Audio,\n\n\tgetOutput: function () {\n\n\t\treturn this.gain;\n\n\t},\n\n\tsetNodeSource: function ( audioNode ) {\n\n\t\tthis.hasPlaybackControl = false;\n\t\tthis.sourceType = 'audioNode';\n\t\tthis.source = audioNode;\n\t\tthis.connect();\n\n\t\treturn this;\n\n\t},\n\n\tsetMediaElementSource: function ( mediaElement ) {\n\n\t\tthis.hasPlaybackControl = false;\n\t\tthis.sourceType = 'mediaNode';\n\t\tthis.source = this.context.createMediaElementSource( mediaElement );\n\t\tthis.connect();\n\n\t\treturn this;\n\n\t},\n\n\tsetMediaStreamSource: function ( mediaStream ) {\n\n\t\tthis.hasPlaybackControl = false;\n\t\tthis.sourceType = 'mediaStreamNode';\n\t\tthis.source = this.context.createMediaStreamSource( mediaStream );\n\t\tthis.connect();\n\n\t\treturn this;\n\n\t},\n\n\tsetBuffer: function ( audioBuffer ) {\n\n\t\tthis.buffer = audioBuffer;\n\t\tthis.sourceType = 'buffer';\n\n\t\tif ( this.autoplay ) this.play();\n\n\t\treturn this;\n\n\t},\n\n\tplay: function ( delay ) {\n\n\t\tif ( delay === undefined ) delay = 0;\n\n\t\tif ( this.isPlaying === true ) {\n\n\t\t\tconsole.warn( 'THREE.Audio: Audio is already playing.' );\n\t\t\treturn;\n\n\t\t}\n\n\t\tif ( this.hasPlaybackControl === false ) {\n\n\t\t\tconsole.warn( 'THREE.Audio: this Audio has no playback control.' );\n\t\t\treturn;\n\n\t\t}\n\n\t\tthis._startedAt = this.context.currentTime + delay;\n\n\t\tvar source = this.context.createBufferSource();\n\t\tsource.buffer = this.buffer;\n\t\tsource.loop = this.loop;\n\t\tsource.loopStart = this.loopStart;\n\t\tsource.loopEnd = this.loopEnd;\n\t\tsource.onended = this.onEnded.bind( this );\n\t\tsource.start( this._startedAt, this._pausedAt + this.offset, this.duration );\n\n\t\tthis.isPlaying = true;\n\n\t\tthis.source = source;\n\n\t\tthis.setDetune( this.detune );\n\t\tthis.setPlaybackRate( this.playbackRate );\n\n\t\treturn this.connect();\n\n\t},\n\n\tpause: function () {\n\n\t\tif ( this.hasPlaybackControl === false ) {\n\n\t\t\tconsole.warn( 'THREE.Audio: this Audio has no playback control.' );\n\t\t\treturn;\n\n\t\t}\n\n\t\tif ( this.isPlaying === true ) {\n\n\t\t\tthis._pausedAt += Math.max( this.context.currentTime - this._startedAt, 0 ) * this.playbackRate;\n\n\t\t\tthis.source.stop();\n\t\t\tthis.source.onended = null;\n\n\t\t\tthis.isPlaying = false;\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tstop: function () {\n\n\t\tif ( this.hasPlaybackControl === false ) {\n\n\t\t\tconsole.warn( 'THREE.Audio: this Audio has no playback control.' );\n\t\t\treturn;\n\n\t\t}\n\n\t\tthis._pausedAt = 0;\n\n\t\tthis.source.stop();\n\t\tthis.source.onended = null;\n\t\tthis.isPlaying = false;\n\n\t\treturn this;\n\n\t},\n\n\tconnect: function () {\n\n\t\tif ( this.filters.length > 0 ) {\n\n\t\t\tthis.source.connect( this.filters[ 0 ] );\n\n\t\t\tfor ( var i = 1, l = this.filters.length; i < l; i ++ ) {\n\n\t\t\t\tthis.filters[ i - 1 ].connect( this.filters[ i ] );\n\n\t\t\t}\n\n\t\t\tthis.filters[ this.filters.length - 1 ].connect( this.getOutput() );\n\n\t\t} else {\n\n\t\t\tthis.source.connect( this.getOutput() );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tdisconnect: function () {\n\n\t\tif ( this.filters.length > 0 ) {\n\n\t\t\tthis.source.disconnect( this.filters[ 0 ] );\n\n\t\t\tfor ( var i = 1, l = this.filters.length; i < l; i ++ ) {\n\n\t\t\t\tthis.filters[ i - 1 ].disconnect( this.filters[ i ] );\n\n\t\t\t}\n\n\t\t\tthis.filters[ this.filters.length - 1 ].disconnect( this.getOutput() );\n\n\t\t} else {\n\n\t\t\tthis.source.disconnect( this.getOutput() );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tgetFilters: function () {\n\n\t\treturn this.filters;\n\n\t},\n\n\tsetFilters: function ( value ) {\n\n\t\tif ( ! value ) value = [];\n\n\t\tif ( this.isPlaying === true ) {\n\n\t\t\tthis.disconnect();\n\t\t\tthis.filters = value;\n\t\t\tthis.connect();\n\n\t\t} else {\n\n\t\t\tthis.filters = value;\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tsetDetune: function ( value ) {\n\n\t\tthis.detune = value;\n\n\t\tif ( this.source.detune === undefined ) return; // only set detune when available\n\n\t\tif ( this.isPlaying === true ) {\n\n\t\t\tthis.source.detune.setTargetAtTime( this.detune, this.context.currentTime, 0.01 );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tgetDetune: function () {\n\n\t\treturn this.detune;\n\n\t},\n\n\tgetFilter: function () {\n\n\t\treturn this.getFilters()[ 0 ];\n\n\t},\n\n\tsetFilter: function ( filter ) {\n\n\t\treturn this.setFilters( filter ? [ filter ] : [] );\n\n\t},\n\n\tsetPlaybackRate: function ( value ) {\n\n\t\tif ( this.hasPlaybackControl === false ) {\n\n\t\t\tconsole.warn( 'THREE.Audio: this Audio has no playback control.' );\n\t\t\treturn;\n\n\t\t}\n\n\t\tthis.playbackRate = value;\n\n\t\tif ( this.isPlaying === true ) {\n\n\t\t\tthis.source.playbackRate.setTargetAtTime( this.playbackRate, this.context.currentTime, 0.01 );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tgetPlaybackRate: function () {\n\n\t\treturn this.playbackRate;\n\n\t},\n\n\tonEnded: function () {\n\n\t\tthis.isPlaying = false;\n\n\t},\n\n\tgetLoop: function () {\n\n\t\tif ( this.hasPlaybackControl === false ) {\n\n\t\t\tconsole.warn( 'THREE.Audio: this Audio has no playback control.' );\n\t\t\treturn false;\n\n\t\t}\n\n\t\treturn this.loop;\n\n\t},\n\n\tsetLoop: function ( value ) {\n\n\t\tif ( this.hasPlaybackControl === false ) {\n\n\t\t\tconsole.warn( 'THREE.Audio: this Audio has no playback control.' );\n\t\t\treturn;\n\n\t\t}\n\n\t\tthis.loop = value;\n\n\t\tif ( this.isPlaying === true ) {\n\n\t\t\tthis.source.loop = this.loop;\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tsetLoopStart: function ( value ) {\n\n\t\tthis.loopStart = value;\n\n\t\treturn this;\n\n\t},\n\n\tsetLoopEnd: function ( value ) {\n\n\t\tthis.loopEnd = value;\n\n\t\treturn this;\n\n\t},\n\n\tgetVolume: function () {\n\n\t\treturn this.gain.gain.value;\n\n\t},\n\n\tsetVolume: function ( value ) {\n\n\t\tthis.gain.gain.setTargetAtTime( value, this.context.currentTime, 0.01 );\n\n\t\treturn this;\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nvar _position$3 = new Vector3();\nvar _quaternion$4 = new Quaternion();\nvar _scale$2 = new Vector3();\nvar _orientation$1 = new Vector3();\n\nfunction PositionalAudio( listener ) {\n\n\tAudio.call( this, listener );\n\n\tthis.panner = this.context.createPanner();\n\tthis.panner.panningModel = 'HRTF';\n\tthis.panner.connect( this.gain );\n\n}\n\nPositionalAudio.prototype = Object.assign( Object.create( Audio.prototype ), {\n\n\tconstructor: PositionalAudio,\n\n\tgetOutput: function () {\n\n\t\treturn this.panner;\n\n\t},\n\n\tgetRefDistance: function () {\n\n\t\treturn this.panner.refDistance;\n\n\t},\n\n\tsetRefDistance: function ( value ) {\n\n\t\tthis.panner.refDistance = value;\n\n\t\treturn this;\n\n\t},\n\n\tgetRolloffFactor: function () {\n\n\t\treturn this.panner.rolloffFactor;\n\n\t},\n\n\tsetRolloffFactor: function ( value ) {\n\n\t\tthis.panner.rolloffFactor = value;\n\n\t\treturn this;\n\n\t},\n\n\tgetDistanceModel: function () {\n\n\t\treturn this.panner.distanceModel;\n\n\t},\n\n\tsetDistanceModel: function ( value ) {\n\n\t\tthis.panner.distanceModel = value;\n\n\t\treturn this;\n\n\t},\n\n\tgetMaxDistance: function () {\n\n\t\treturn this.panner.maxDistance;\n\n\t},\n\n\tsetMaxDistance: function ( value ) {\n\n\t\tthis.panner.maxDistance = value;\n\n\t\treturn this;\n\n\t},\n\n\tsetDirectionalCone: function ( coneInnerAngle, coneOuterAngle, coneOuterGain ) {\n\n\t\tthis.panner.coneInnerAngle = coneInnerAngle;\n\t\tthis.panner.coneOuterAngle = coneOuterAngle;\n\t\tthis.panner.coneOuterGain = coneOuterGain;\n\n\t\treturn this;\n\n\t},\n\n\tupdateMatrixWorld: function ( force ) {\n\n\t\tObject3D.prototype.updateMatrixWorld.call( this, force );\n\n\t\tif ( this.hasPlaybackControl === true && this.isPlaying === false ) return;\n\n\t\tthis.matrixWorld.decompose( _position$3, _quaternion$4, _scale$2 );\n\n\t\t_orientation$1.set( 0, 0, 1 ).applyQuaternion( _quaternion$4 );\n\n\t\tvar panner = this.panner;\n\n\t\tif ( panner.positionX ) {\n\n\t\t\t// code path for Chrome and Firefox (see #14393)\n\n\t\t\tvar endTime = this.context.currentTime + this.listener.timeDelta;\n\n\t\t\tpanner.positionX.linearRampToValueAtTime( _position$3.x, endTime );\n\t\t\tpanner.positionY.linearRampToValueAtTime( _position$3.y, endTime );\n\t\t\tpanner.positionZ.linearRampToValueAtTime( _position$3.z, endTime );\n\t\t\tpanner.orientationX.linearRampToValueAtTime( _orientation$1.x, endTime );\n\t\t\tpanner.orientationY.linearRampToValueAtTime( _orientation$1.y, endTime );\n\t\t\tpanner.orientationZ.linearRampToValueAtTime( _orientation$1.z, endTime );\n\n\t\t} else {\n\n\t\t\tpanner.setPosition( _position$3.x, _position$3.y, _position$3.z );\n\t\t\tpanner.setOrientation( _orientation$1.x, _orientation$1.y, _orientation$1.z );\n\n\t\t}\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction AudioAnalyser( audio, fftSize ) {\n\n\tthis.analyser = audio.context.createAnalyser();\n\tthis.analyser.fftSize = fftSize !== undefined ? fftSize : 2048;\n\n\tthis.data = new Uint8Array( this.analyser.frequencyBinCount );\n\n\taudio.getOutput().connect( this.analyser );\n\n}\n\nObject.assign( AudioAnalyser.prototype, {\n\n\tgetFrequencyData: function () {\n\n\t\tthis.analyser.getByteFrequencyData( this.data );\n\n\t\treturn this.data;\n\n\t},\n\n\tgetAverageFrequency: function () {\n\n\t\tvar value = 0, data = this.getFrequencyData();\n\n\t\tfor ( var i = 0; i < data.length; i ++ ) {\n\n\t\t\tvalue += data[ i ];\n\n\t\t}\n\n\t\treturn value / data.length;\n\n\t}\n\n} );\n\n/**\n *\n * Buffered scene graph property that allows weighted accumulation.\n *\n *\n * @author Ben Houston / http://clara.io/\n * @author David Sarno / http://lighthaus.us/\n * @author tschw\n */\n\nfunction PropertyMixer( binding, typeName, valueSize ) {\n\n\tthis.binding = binding;\n\tthis.valueSize = valueSize;\n\n\tvar bufferType = Float64Array,\n\t\tmixFunction;\n\n\tswitch ( typeName ) {\n\n\t\tcase 'quaternion':\n\t\t\tmixFunction = this._slerp;\n\t\t\tbreak;\n\n\t\tcase 'string':\n\t\tcase 'bool':\n\t\t\tbufferType = Array;\n\t\t\tmixFunction = this._select;\n\t\t\tbreak;\n\n\t\tdefault:\n\t\t\tmixFunction = this._lerp;\n\n\t}\n\n\tthis.buffer = new bufferType( valueSize * 4 );\n\t// layout: [ incoming | accu0 | accu1 | orig ]\n\t//\n\t// interpolators can use .buffer as their .result\n\t// the data then goes to 'incoming'\n\t//\n\t// 'accu0' and 'accu1' are used frame-interleaved for\n\t// the cumulative result and are compared to detect\n\t// changes\n\t//\n\t// 'orig' stores the original state of the property\n\n\tthis._mixBufferRegion = mixFunction;\n\n\tthis.cumulativeWeight = 0;\n\n\tthis.useCount = 0;\n\tthis.referenceCount = 0;\n\n}\n\nObject.assign( PropertyMixer.prototype, {\n\n\t// accumulate data in the 'incoming' region into 'accu<i>'\n\taccumulate: function ( accuIndex, weight ) {\n\n\t\t// note: happily accumulating nothing when weight = 0, the caller knows\n\t\t// the weight and shouldn't have made the call in the first place\n\n\t\tvar buffer = this.buffer,\n\t\t\tstride = this.valueSize,\n\t\t\toffset = accuIndex * stride + stride,\n\n\t\t\tcurrentWeight = this.cumulativeWeight;\n\n\t\tif ( currentWeight === 0 ) {\n\n\t\t\t// accuN := incoming * weight\n\n\t\t\tfor ( var i = 0; i !== stride; ++ i ) {\n\n\t\t\t\tbuffer[ offset + i ] = buffer[ i ];\n\n\t\t\t}\n\n\t\t\tcurrentWeight = weight;\n\n\t\t} else {\n\n\t\t\t// accuN := accuN + incoming * weight\n\n\t\t\tcurrentWeight += weight;\n\t\t\tvar mix = weight / currentWeight;\n\t\t\tthis._mixBufferRegion( buffer, offset, 0, mix, stride );\n\n\t\t}\n\n\t\tthis.cumulativeWeight = currentWeight;\n\n\t},\n\n\t// apply the state of 'accu<i>' to the binding when accus differ\n\tapply: function ( accuIndex ) {\n\n\t\tvar stride = this.valueSize,\n\t\t\tbuffer = this.buffer,\n\t\t\toffset = accuIndex * stride + stride,\n\n\t\t\tweight = this.cumulativeWeight,\n\n\t\t\tbinding = this.binding;\n\n\t\tthis.cumulativeWeight = 0;\n\n\t\tif ( weight < 1 ) {\n\n\t\t\t// accuN := accuN + original * ( 1 - cumulativeWeight )\n\n\t\t\tvar originalValueOffset = stride * 3;\n\n\t\t\tthis._mixBufferRegion(\n\t\t\t\tbuffer, offset, originalValueOffset, 1 - weight, stride );\n\n\t\t}\n\n\t\tfor ( var i = stride, e = stride + stride; i !== e; ++ i ) {\n\n\t\t\tif ( buffer[ i ] !== buffer[ i + stride ] ) {\n\n\t\t\t\t// value has changed -> update scene graph\n\n\t\t\t\tbinding.setValue( buffer, offset );\n\t\t\t\tbreak;\n\n\t\t\t}\n\n\t\t}\n\n\t},\n\n\t// remember the state of the bound property and copy it to both accus\n\tsaveOriginalState: function () {\n\n\t\tvar binding = this.binding;\n\n\t\tvar buffer = this.buffer,\n\t\t\tstride = this.valueSize,\n\n\t\t\toriginalValueOffset = stride * 3;\n\n\t\tbinding.getValue( buffer, originalValueOffset );\n\n\t\t// accu[0..1] := orig -- initially detect changes against the original\n\t\tfor ( var i = stride, e = originalValueOffset; i !== e; ++ i ) {\n\n\t\t\tbuffer[ i ] = buffer[ originalValueOffset + ( i % stride ) ];\n\n\t\t}\n\n\t\tthis.cumulativeWeight = 0;\n\n\t},\n\n\t// apply the state previously taken via 'saveOriginalState' to the binding\n\trestoreOriginalState: function () {\n\n\t\tvar originalValueOffset = this.valueSize * 3;\n\t\tthis.binding.setValue( this.buffer, originalValueOffset );\n\n\t},\n\n\n\t// mix functions\n\n\t_select: function ( buffer, dstOffset, srcOffset, t, stride ) {\n\n\t\tif ( t >= 0.5 ) {\n\n\t\t\tfor ( var i = 0; i !== stride; ++ i ) {\n\n\t\t\t\tbuffer[ dstOffset + i ] = buffer[ srcOffset + i ];\n\n\t\t\t}\n\n\t\t}\n\n\t},\n\n\t_slerp: function ( buffer, dstOffset, srcOffset, t ) {\n\n\t\tQuaternion.slerpFlat( buffer, dstOffset, buffer, dstOffset, buffer, srcOffset, t );\n\n\t},\n\n\t_lerp: function ( buffer, dstOffset, srcOffset, t, stride ) {\n\n\t\tvar s = 1 - t;\n\n\t\tfor ( var i = 0; i !== stride; ++ i ) {\n\n\t\t\tvar j = dstOffset + i;\n\n\t\t\tbuffer[ j ] = buffer[ j ] * s + buffer[ srcOffset + i ] * t;\n\n\t\t}\n\n\t}\n\n} );\n\n/**\n *\n * A reference to a real property in the scene graph.\n *\n *\n * @author Ben Houston / http://clara.io/\n * @author David Sarno / http://lighthaus.us/\n * @author tschw\n */\n\n// Characters [].:/ are reserved for track binding syntax.\nvar _RESERVED_CHARS_RE = '\\\\[\\\\]\\\\.:\\\\/';\nvar _reservedRe = new RegExp( '[' + _RESERVED_CHARS_RE + ']', 'g' );\n\n// Attempts to allow node names from any language. ES5's `\\w` regexp matches\n// only latin characters, and the unicode \\p{L} is not yet supported. So\n// instead, we exclude reserved characters and match everything else.\nvar _wordChar = '[^' + _RESERVED_CHARS_RE + ']';\nvar _wordCharOrDot = '[^' + _RESERVED_CHARS_RE.replace( '\\\\.', '' ) + ']';\n\n// Parent directories, delimited by '/' or ':'. Currently unused, but must\n// be matched to parse the rest of the track name.\nvar _directoryRe = /((?:WC+[\\/:])*)/.source.replace( 'WC', _wordChar );\n\n// Target node. May contain word characters (a-zA-Z0-9_) and '.' or '-'.\nvar _nodeRe = /(WCOD+)?/.source.replace( 'WCOD', _wordCharOrDot );\n\n// Object on target node, and accessor. May not contain reserved\n// characters. Accessor may contain any character except closing bracket.\nvar _objectRe = /(?:\\.(WC+)(?:\\[(.+)\\])?)?/.source.replace( 'WC', _wordChar );\n\n// Property and accessor. May not contain reserved characters. Accessor may\n// contain any non-bracket characters.\nvar _propertyRe = /\\.(WC+)(?:\\[(.+)\\])?/.source.replace( 'WC', _wordChar );\n\nvar _trackRe = new RegExp( ''\n\t+ '^'\n\t+ _directoryRe\n\t+ _nodeRe\n\t+ _objectRe\n\t+ _propertyRe\n\t+ '$'\n);\n\nvar _supportedObjectNames = [ 'material', 'materials', 'bones' ];\n\nfunction Composite( targetGroup, path, optionalParsedPath ) {\n\n\tvar parsedPath = optionalParsedPath || PropertyBinding.parseTrackName( path );\n\n\tthis._targetGroup = targetGroup;\n\tthis._bindings = targetGroup.subscribe_( path, parsedPath );\n\n}\n\nObject.assign( Composite.prototype, {\n\n\tgetValue: function ( array, offset ) {\n\n\t\tthis.bind(); // bind all binding\n\n\t\tvar firstValidIndex = this._targetGroup.nCachedObjects_,\n\t\t\tbinding = this._bindings[ firstValidIndex ];\n\n\t\t// and only call .getValue on the first\n\t\tif ( binding !== undefined ) binding.getValue( array, offset );\n\n\t},\n\n\tsetValue: function ( array, offset ) {\n\n\t\tvar bindings = this._bindings;\n\n\t\tfor ( var i = this._targetGroup.nCachedObjects_, n = bindings.length; i !== n; ++ i ) {\n\n\t\t\tbindings[ i ].setValue( array, offset );\n\n\t\t}\n\n\t},\n\n\tbind: function () {\n\n\t\tvar bindings = this._bindings;\n\n\t\tfor ( var i = this._targetGroup.nCachedObjects_, n = bindings.length; i !== n; ++ i ) {\n\n\t\t\tbindings[ i ].bind();\n\n\t\t}\n\n\t},\n\n\tunbind: function () {\n\n\t\tvar bindings = this._bindings;\n\n\t\tfor ( var i = this._targetGroup.nCachedObjects_, n = bindings.length; i !== n; ++ i ) {\n\n\t\t\tbindings[ i ].unbind();\n\n\t\t}\n\n\t}\n\n} );\n\n\nfunction PropertyBinding( rootNode, path, parsedPath ) {\n\n\tthis.path = path;\n\tthis.parsedPath = parsedPath || PropertyBinding.parseTrackName( path );\n\n\tthis.node = PropertyBinding.findNode( rootNode, this.parsedPath.nodeName ) || rootNode;\n\n\tthis.rootNode = rootNode;\n\n}\n\nObject.assign( PropertyBinding, {\n\n\tComposite: Composite,\n\n\tcreate: function ( root, path, parsedPath ) {\n\n\t\tif ( ! ( root && root.isAnimationObjectGroup ) ) {\n\n\t\t\treturn new PropertyBinding( root, path, parsedPath );\n\n\t\t} else {\n\n\t\t\treturn new PropertyBinding.Composite( root, path, parsedPath );\n\n\t\t}\n\n\t},\n\n\t/**\n\t * Replaces spaces with underscores and removes unsupported characters from\n\t * node names, to ensure compatibility with parseTrackName().\n\t *\n\t * @param {string} name Node name to be sanitized.\n\t * @return {string}\n\t */\n\tsanitizeNodeName: function ( name ) {\n\n\t\treturn name.replace( /\\s/g, '_' ).replace( _reservedRe, '' );\n\n\t},\n\n\tparseTrackName: function ( trackName ) {\n\n\t\tvar matches = _trackRe.exec( trackName );\n\n\t\tif ( ! matches ) {\n\n\t\t\tthrow new Error( 'PropertyBinding: Cannot parse trackName: ' + trackName );\n\n\t\t}\n\n\t\tvar results = {\n\t\t\t// directoryName: matches[ 1 ], // (tschw) currently unused\n\t\t\tnodeName: matches[ 2 ],\n\t\t\tobjectName: matches[ 3 ],\n\t\t\tobjectIndex: matches[ 4 ],\n\t\t\tpropertyName: matches[ 5 ], // required\n\t\t\tpropertyIndex: matches[ 6 ]\n\t\t};\n\n\t\tvar lastDot = results.nodeName && results.nodeName.lastIndexOf( '.' );\n\n\t\tif ( lastDot !== undefined && lastDot !== - 1 ) {\n\n\t\t\tvar objectName = results.nodeName.substring( lastDot + 1 );\n\n\t\t\t// Object names must be checked against a whitelist. Otherwise, there\n\t\t\t// is no way to parse 'foo.bar.baz': 'baz' must be a property, but\n\t\t\t// 'bar' could be the objectName, or part of a nodeName (which can\n\t\t\t// include '.' characters).\n\t\t\tif ( _supportedObjectNames.indexOf( objectName ) !== - 1 ) {\n\n\t\t\t\tresults.nodeName = results.nodeName.substring( 0, lastDot );\n\t\t\t\tresults.objectName = objectName;\n\n\t\t\t}\n\n\t\t}\n\n\t\tif ( results.propertyName === null || results.propertyName.length === 0 ) {\n\n\t\t\tthrow new Error( 'PropertyBinding: can not parse propertyName from trackName: ' + trackName );\n\n\t\t}\n\n\t\treturn results;\n\n\t},\n\n\tfindNode: function ( root, nodeName ) {\n\n\t\tif ( ! nodeName || nodeName === \"\" || nodeName === \".\" || nodeName === - 1 || nodeName === root.name || nodeName === root.uuid ) {\n\n\t\t\treturn root;\n\n\t\t}\n\n\t\t// search into skeleton bones.\n\t\tif ( root.skeleton ) {\n\n\t\t\tvar bone = root.skeleton.getBoneByName( nodeName );\n\n\t\t\tif ( bone !== undefined ) {\n\n\t\t\t\treturn bone;\n\n\t\t\t}\n\n\t\t}\n\n\t\t// search into node subtree.\n\t\tif ( root.children ) {\n\n\t\t\tvar searchNodeSubtree = function ( children ) {\n\n\t\t\t\tfor ( var i = 0; i < children.length; i ++ ) {\n\n\t\t\t\t\tvar childNode = children[ i ];\n\n\t\t\t\t\tif ( childNode.name === nodeName || childNode.uuid === nodeName ) {\n\n\t\t\t\t\t\treturn childNode;\n\n\t\t\t\t\t}\n\n\t\t\t\t\tvar result = searchNodeSubtree( childNode.children );\n\n\t\t\t\t\tif ( result ) return result;\n\n\t\t\t\t}\n\n\t\t\t\treturn null;\n\n\t\t\t};\n\n\t\t\tvar subTreeNode = searchNodeSubtree( root.children );\n\n\t\t\tif ( subTreeNode ) {\n\n\t\t\t\treturn subTreeNode;\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn null;\n\n\t}\n\n} );\n\nObject.assign( PropertyBinding.prototype, { // prototype, continued\n\n\t// these are used to \"bind\" a nonexistent property\n\t_getValue_unavailable: function () {},\n\t_setValue_unavailable: function () {},\n\n\tBindingType: {\n\t\tDirect: 0,\n\t\tEntireArray: 1,\n\t\tArrayElement: 2,\n\t\tHasFromToArray: 3\n\t},\n\n\tVersioning: {\n\t\tNone: 0,\n\t\tNeedsUpdate: 1,\n\t\tMatrixWorldNeedsUpdate: 2\n\t},\n\n\tGetterByBindingType: [\n\n\t\tfunction getValue_direct( buffer, offset ) {\n\n\t\t\tbuffer[ offset ] = this.node[ this.propertyName ];\n\n\t\t},\n\n\t\tfunction getValue_array( buffer, offset ) {\n\n\t\t\tvar source = this.resolvedProperty;\n\n\t\t\tfor ( var i = 0, n = source.length; i !== n; ++ i ) {\n\n\t\t\t\tbuffer[ offset ++ ] = source[ i ];\n\n\t\t\t}\n\n\t\t},\n\n\t\tfunction getValue_arrayElement( buffer, offset ) {\n\n\t\t\tbuffer[ offset ] = this.resolvedProperty[ this.propertyIndex ];\n\n\t\t},\n\n\t\tfunction getValue_toArray( buffer, offset ) {\n\n\t\t\tthis.resolvedProperty.toArray( buffer, offset );\n\n\t\t}\n\n\t],\n\n\tSetterByBindingTypeAndVersioning: [\n\n\t\t[\n\t\t\t// Direct\n\n\t\t\tfunction setValue_direct( buffer, offset ) {\n\n\t\t\t\tthis.targetObject[ this.propertyName ] = buffer[ offset ];\n\n\t\t\t},\n\n\t\t\tfunction setValue_direct_setNeedsUpdate( buffer, offset ) {\n\n\t\t\t\tthis.targetObject[ this.propertyName ] = buffer[ offset ];\n\t\t\t\tthis.targetObject.needsUpdate = true;\n\n\t\t\t},\n\n\t\t\tfunction setValue_direct_setMatrixWorldNeedsUpdate( buffer, offset ) {\n\n\t\t\t\tthis.targetObject[ this.propertyName ] = buffer[ offset ];\n\t\t\t\tthis.targetObject.matrixWorldNeedsUpdate = true;\n\n\t\t\t}\n\n\t\t], [\n\n\t\t\t// EntireArray\n\n\t\t\tfunction setValue_array( buffer, offset ) {\n\n\t\t\t\tvar dest = this.resolvedProperty;\n\n\t\t\t\tfor ( var i = 0, n = dest.length; i !== n; ++ i ) {\n\n\t\t\t\t\tdest[ i ] = buffer[ offset ++ ];\n\n\t\t\t\t}\n\n\t\t\t},\n\n\t\t\tfunction setValue_array_setNeedsUpdate( buffer, offset ) {\n\n\t\t\t\tvar dest = this.resolvedProperty;\n\n\t\t\t\tfor ( var i = 0, n = dest.length; i !== n; ++ i ) {\n\n\t\t\t\t\tdest[ i ] = buffer[ offset ++ ];\n\n\t\t\t\t}\n\n\t\t\t\tthis.targetObject.needsUpdate = true;\n\n\t\t\t},\n\n\t\t\tfunction setValue_array_setMatrixWorldNeedsUpdate( buffer, offset ) {\n\n\t\t\t\tvar dest = this.resolvedProperty;\n\n\t\t\t\tfor ( var i = 0, n = dest.length; i !== n; ++ i ) {\n\n\t\t\t\t\tdest[ i ] = buffer[ offset ++ ];\n\n\t\t\t\t}\n\n\t\t\t\tthis.targetObject.matrixWorldNeedsUpdate = true;\n\n\t\t\t}\n\n\t\t], [\n\n\t\t\t// ArrayElement\n\n\t\t\tfunction setValue_arrayElement( buffer, offset ) {\n\n\t\t\t\tthis.resolvedProperty[ this.propertyIndex ] = buffer[ offset ];\n\n\t\t\t},\n\n\t\t\tfunction setValue_arrayElement_setNeedsUpdate( buffer, offset ) {\n\n\t\t\t\tthis.resolvedProperty[ this.propertyIndex ] = buffer[ offset ];\n\t\t\t\tthis.targetObject.needsUpdate = true;\n\n\t\t\t},\n\n\t\t\tfunction setValue_arrayElement_setMatrixWorldNeedsUpdate( buffer, offset ) {\n\n\t\t\t\tthis.resolvedProperty[ this.propertyIndex ] = buffer[ offset ];\n\t\t\t\tthis.targetObject.matrixWorldNeedsUpdate = true;\n\n\t\t\t}\n\n\t\t], [\n\n\t\t\t// HasToFromArray\n\n\t\t\tfunction setValue_fromArray( buffer, offset ) {\n\n\t\t\t\tthis.resolvedProperty.fromArray( buffer, offset );\n\n\t\t\t},\n\n\t\t\tfunction setValue_fromArray_setNeedsUpdate( buffer, offset ) {\n\n\t\t\t\tthis.resolvedProperty.fromArray( buffer, offset );\n\t\t\t\tthis.targetObject.needsUpdate = true;\n\n\t\t\t},\n\n\t\t\tfunction setValue_fromArray_setMatrixWorldNeedsUpdate( buffer, offset ) {\n\n\t\t\t\tthis.resolvedProperty.fromArray( buffer, offset );\n\t\t\t\tthis.targetObject.matrixWorldNeedsUpdate = true;\n\n\t\t\t}\n\n\t\t]\n\n\t],\n\n\tgetValue: function getValue_unbound( targetArray, offset ) {\n\n\t\tthis.bind();\n\t\tthis.getValue( targetArray, offset );\n\n\t\t// Note: This class uses a State pattern on a per-method basis:\n\t\t// 'bind' sets 'this.getValue' / 'setValue' and shadows the\n\t\t// prototype version of these methods with one that represents\n\t\t// the bound state. When the property is not found, the methods\n\t\t// become no-ops.\n\n\t},\n\n\tsetValue: function getValue_unbound( sourceArray, offset ) {\n\n\t\tthis.bind();\n\t\tthis.setValue( sourceArray, offset );\n\n\t},\n\n\t// create getter / setter pair for a property in the scene graph\n\tbind: function () {\n\n\t\tvar targetObject = this.node,\n\t\t\tparsedPath = this.parsedPath,\n\n\t\t\tobjectName = parsedPath.objectName,\n\t\t\tpropertyName = parsedPath.propertyName,\n\t\t\tpropertyIndex = parsedPath.propertyIndex;\n\n\t\tif ( ! targetObject ) {\n\n\t\t\ttargetObject = PropertyBinding.findNode( this.rootNode, parsedPath.nodeName ) || this.rootNode;\n\n\t\t\tthis.node = targetObject;\n\n\t\t}\n\n\t\t// set fail state so we can just 'return' on error\n\t\tthis.getValue = this._getValue_unavailable;\n\t\tthis.setValue = this._setValue_unavailable;\n\n\t\t// ensure there is a value node\n\t\tif ( ! targetObject ) {\n\n\t\t\tconsole.error( 'THREE.PropertyBinding: Trying to update node for track: ' + this.path + ' but it wasn\\'t found.' );\n\t\t\treturn;\n\n\t\t}\n\n\t\tif ( objectName ) {\n\n\t\t\tvar objectIndex = parsedPath.objectIndex;\n\n\t\t\t// special cases were we need to reach deeper into the hierarchy to get the face materials....\n\t\t\tswitch ( objectName ) {\n\n\t\t\t\tcase 'materials':\n\n\t\t\t\t\tif ( ! targetObject.material ) {\n\n\t\t\t\t\t\tconsole.error( 'THREE.PropertyBinding: Can not bind to material as node does not have a material.', this );\n\t\t\t\t\t\treturn;\n\n\t\t\t\t\t}\n\n\t\t\t\t\tif ( ! targetObject.material.materials ) {\n\n\t\t\t\t\t\tconsole.error( 'THREE.PropertyBinding: Can not bind to material.materials as node.material does not have a materials array.', this );\n\t\t\t\t\t\treturn;\n\n\t\t\t\t\t}\n\n\t\t\t\t\ttargetObject = targetObject.material.materials;\n\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase 'bones':\n\n\t\t\t\t\tif ( ! targetObject.skeleton ) {\n\n\t\t\t\t\t\tconsole.error( 'THREE.PropertyBinding: Can not bind to bones as node does not have a skeleton.', this );\n\t\t\t\t\t\treturn;\n\n\t\t\t\t\t}\n\n\t\t\t\t\t// potential future optimization: skip this if propertyIndex is already an integer\n\t\t\t\t\t// and convert the integer string to a true integer.\n\n\t\t\t\t\ttargetObject = targetObject.skeleton.bones;\n\n\t\t\t\t\t// support resolving morphTarget names into indices.\n\t\t\t\t\tfor ( var i = 0; i < targetObject.length; i ++ ) {\n\n\t\t\t\t\t\tif ( targetObject[ i ].name === objectIndex ) {\n\n\t\t\t\t\t\t\tobjectIndex = i;\n\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t\tbreak;\n\n\t\t\t\tdefault:\n\n\t\t\t\t\tif ( targetObject[ objectName ] === undefined ) {\n\n\t\t\t\t\t\tconsole.error( 'THREE.PropertyBinding: Can not bind to objectName of node undefined.', this );\n\t\t\t\t\t\treturn;\n\n\t\t\t\t\t}\n\n\t\t\t\t\ttargetObject = targetObject[ objectName ];\n\n\t\t\t}\n\n\n\t\t\tif ( objectIndex !== undefined ) {\n\n\t\t\t\tif ( targetObject[ objectIndex ] === undefined ) {\n\n\t\t\t\t\tconsole.error( 'THREE.PropertyBinding: Trying to bind to objectIndex of objectName, but is undefined.', this, targetObject );\n\t\t\t\t\treturn;\n\n\t\t\t\t}\n\n\t\t\t\ttargetObject = targetObject[ objectIndex ];\n\n\t\t\t}\n\n\t\t}\n\n\t\t// resolve property\n\t\tvar nodeProperty = targetObject[ propertyName ];\n\n\t\tif ( nodeProperty === undefined ) {\n\n\t\t\tvar nodeName = parsedPath.nodeName;\n\n\t\t\tconsole.error( 'THREE.PropertyBinding: Trying to update property for track: ' + nodeName +\n\t\t\t\t'.' + propertyName + ' but it wasn\\'t found.', targetObject );\n\t\t\treturn;\n\n\t\t}\n\n\t\t// determine versioning scheme\n\t\tvar versioning = this.Versioning.None;\n\n\t\tthis.targetObject = targetObject;\n\n\t\tif ( targetObject.needsUpdate !== undefined ) { // material\n\n\t\t\tversioning = this.Versioning.NeedsUpdate;\n\n\t\t} else if ( targetObject.matrixWorldNeedsUpdate !== undefined ) { // node transform\n\n\t\t\tversioning = this.Versioning.MatrixWorldNeedsUpdate;\n\n\t\t}\n\n\t\t// determine how the property gets bound\n\t\tvar bindingType = this.BindingType.Direct;\n\n\t\tif ( propertyIndex !== undefined ) {\n\n\t\t\t// access a sub element of the property array (only primitives are supported right now)\n\n\t\t\tif ( propertyName === \"morphTargetInfluences\" ) {\n\n\t\t\t\t// potential optimization, skip this if propertyIndex is already an integer, and convert the integer string to a true integer.\n\n\t\t\t\t// support resolving morphTarget names into indices.\n\t\t\t\tif ( ! targetObject.geometry ) {\n\n\t\t\t\t\tconsole.error( 'THREE.PropertyBinding: Can not bind to morphTargetInfluences because node does not have a geometry.', this );\n\t\t\t\t\treturn;\n\n\t\t\t\t}\n\n\t\t\t\tif ( targetObject.geometry.isBufferGeometry ) {\n\n\t\t\t\t\tif ( ! targetObject.geometry.morphAttributes ) {\n\n\t\t\t\t\t\tconsole.error( 'THREE.PropertyBinding: Can not bind to morphTargetInfluences because node does not have a geometry.morphAttributes.', this );\n\t\t\t\t\t\treturn;\n\n\t\t\t\t\t}\n\n\t\t\t\t\tfor ( var i = 0; i < this.node.geometry.morphAttributes.position.length; i ++ ) {\n\n\t\t\t\t\t\tif ( targetObject.geometry.morphAttributes.position[ i ].name === propertyIndex ) {\n\n\t\t\t\t\t\t\tpropertyIndex = i;\n\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\n\t\t\t\t} else {\n\n\t\t\t\t\tif ( ! targetObject.geometry.morphTargets ) {\n\n\t\t\t\t\t\tconsole.error( 'THREE.PropertyBinding: Can not bind to morphTargetInfluences because node does not have a geometry.morphTargets.', this );\n\t\t\t\t\t\treturn;\n\n\t\t\t\t\t}\n\n\t\t\t\t\tfor ( var i = 0; i < this.node.geometry.morphTargets.length; i ++ ) {\n\n\t\t\t\t\t\tif ( targetObject.geometry.morphTargets[ i ].name === propertyIndex ) {\n\n\t\t\t\t\t\t\tpropertyIndex = i;\n\t\t\t\t\t\t\tbreak;\n\n\t\t\t\t\t\t}\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tbindingType = this.BindingType.ArrayElement;\n\n\t\t\tthis.resolvedProperty = nodeProperty;\n\t\t\tthis.propertyIndex = propertyIndex;\n\n\t\t} else if ( nodeProperty.fromArray !== undefined && nodeProperty.toArray !== undefined ) {\n\n\t\t\t// must use copy for Object3D.Euler/Quaternion\n\n\t\t\tbindingType = this.BindingType.HasFromToArray;\n\n\t\t\tthis.resolvedProperty = nodeProperty;\n\n\t\t} else if ( Array.isArray( nodeProperty ) ) {\n\n\t\t\tbindingType = this.BindingType.EntireArray;\n\n\t\t\tthis.resolvedProperty = nodeProperty;\n\n\t\t} else {\n\n\t\t\tthis.propertyName = propertyName;\n\n\t\t}\n\n\t\t// select getter / setter\n\t\tthis.getValue = this.GetterByBindingType[ bindingType ];\n\t\tthis.setValue = this.SetterByBindingTypeAndVersioning[ bindingType ][ versioning ];\n\n\t},\n\n\tunbind: function () {\n\n\t\tthis.node = null;\n\n\t\t// back to the prototype version of getValue / setValue\n\t\t// note: avoiding to mutate the shape of 'this' via 'delete'\n\t\tthis.getValue = this._getValue_unbound;\n\t\tthis.setValue = this._setValue_unbound;\n\n\t}\n\n} );\n\n//!\\ DECLARE ALIAS AFTER assign prototype !\nObject.assign( PropertyBinding.prototype, {\n\n\t// initial state of these methods that calls 'bind'\n\t_getValue_unbound: PropertyBinding.prototype.getValue,\n\t_setValue_unbound: PropertyBinding.prototype.setValue,\n\n} );\n\n/**\n *\n * A group of objects that receives a shared animation state.\n *\n * Usage:\n *\n *  - Add objects you would otherwise pass as 'root' to the\n *    constructor or the .clipAction method of AnimationMixer.\n *\n *  - Instead pass this object as 'root'.\n *\n *  - You can also add and remove objects later when the mixer\n *    is running.\n *\n * Note:\n *\n *    Objects of this class appear as one object to the mixer,\n *    so cache control of the individual objects must be done\n *    on the group.\n *\n * Limitation:\n *\n *  - The animated properties must be compatible among the\n *    all objects in the group.\n *\n *  - A single property can either be controlled through a\n *    target group or directly, but not both.\n *\n * @author tschw\n */\n\nfunction AnimationObjectGroup() {\n\n\tthis.uuid = MathUtils.generateUUID();\n\n\t// cached objects followed by the active ones\n\tthis._objects = Array.prototype.slice.call( arguments );\n\n\tthis.nCachedObjects_ = 0; // threshold\n\t// note: read by PropertyBinding.Composite\n\n\tvar indices = {};\n\tthis._indicesByUUID = indices; // for bookkeeping\n\n\tfor ( var i = 0, n = arguments.length; i !== n; ++ i ) {\n\n\t\tindices[ arguments[ i ].uuid ] = i;\n\n\t}\n\n\tthis._paths = []; // inside: string\n\tthis._parsedPaths = []; // inside: { we don't care, here }\n\tthis._bindings = []; // inside: Array< PropertyBinding >\n\tthis._bindingsIndicesByPath = {}; // inside: indices in these arrays\n\n\tvar scope = this;\n\n\tthis.stats = {\n\n\t\tobjects: {\n\t\t\tget total() {\n\n\t\t\t\treturn scope._objects.length;\n\n\t\t\t},\n\t\t\tget inUse() {\n\n\t\t\t\treturn this.total - scope.nCachedObjects_;\n\n\t\t\t}\n\t\t},\n\t\tget bindingsPerObject() {\n\n\t\t\treturn scope._bindings.length;\n\n\t\t}\n\n\t};\n\n}\n\nObject.assign( AnimationObjectGroup.prototype, {\n\n\tisAnimationObjectGroup: true,\n\n\tadd: function () {\n\n\t\tvar objects = this._objects,\n\t\t\tnObjects = objects.length,\n\t\t\tnCachedObjects = this.nCachedObjects_,\n\t\t\tindicesByUUID = this._indicesByUUID,\n\t\t\tpaths = this._paths,\n\t\t\tparsedPaths = this._parsedPaths,\n\t\t\tbindings = this._bindings,\n\t\t\tnBindings = bindings.length,\n\t\t\tknownObject = undefined;\n\n\t\tfor ( var i = 0, n = arguments.length; i !== n; ++ i ) {\n\n\t\t\tvar object = arguments[ i ],\n\t\t\t\tuuid = object.uuid,\n\t\t\t\tindex = indicesByUUID[ uuid ];\n\n\t\t\tif ( index === undefined ) {\n\n\t\t\t\t// unknown object -> add it to the ACTIVE region\n\n\t\t\t\tindex = nObjects ++;\n\t\t\t\tindicesByUUID[ uuid ] = index;\n\t\t\t\tobjects.push( object );\n\n\t\t\t\t// accounting is done, now do the same for all bindings\n\n\t\t\t\tfor ( var j = 0, m = nBindings; j !== m; ++ j ) {\n\n\t\t\t\t\tbindings[ j ].push( new PropertyBinding( object, paths[ j ], parsedPaths[ j ] ) );\n\n\t\t\t\t}\n\n\t\t\t} else if ( index < nCachedObjects ) {\n\n\t\t\t\tknownObject = objects[ index ];\n\n\t\t\t\t// move existing object to the ACTIVE region\n\n\t\t\t\tvar firstActiveIndex = -- nCachedObjects,\n\t\t\t\t\tlastCachedObject = objects[ firstActiveIndex ];\n\n\t\t\t\tindicesByUUID[ lastCachedObject.uuid ] = index;\n\t\t\t\tobjects[ index ] = lastCachedObject;\n\n\t\t\t\tindicesByUUID[ uuid ] = firstActiveIndex;\n\t\t\t\tobjects[ firstActiveIndex ] = object;\n\n\t\t\t\t// accounting is done, now do the same for all bindings\n\n\t\t\t\tfor ( var j = 0, m = nBindings; j !== m; ++ j ) {\n\n\t\t\t\t\tvar bindingsForPath = bindings[ j ],\n\t\t\t\t\t\tlastCached = bindingsForPath[ firstActiveIndex ],\n\t\t\t\t\t\tbinding = bindingsForPath[ index ];\n\n\t\t\t\t\tbindingsForPath[ index ] = lastCached;\n\n\t\t\t\t\tif ( binding === undefined ) {\n\n\t\t\t\t\t\t// since we do not bother to create new bindings\n\t\t\t\t\t\t// for objects that are cached, the binding may\n\t\t\t\t\t\t// or may not exist\n\n\t\t\t\t\t\tbinding = new PropertyBinding( object, paths[ j ], parsedPaths[ j ] );\n\n\t\t\t\t\t}\n\n\t\t\t\t\tbindingsForPath[ firstActiveIndex ] = binding;\n\n\t\t\t\t}\n\n\t\t\t} else if ( objects[ index ] !== knownObject ) {\n\n\t\t\t\tconsole.error( 'THREE.AnimationObjectGroup: Different objects with the same UUID ' +\n\t\t\t\t\t'detected. Clean the caches or recreate your infrastructure when reloading scenes.' );\n\n\t\t\t} // else the object is already where we want it to be\n\n\t\t} // for arguments\n\n\t\tthis.nCachedObjects_ = nCachedObjects;\n\n\t},\n\n\tremove: function () {\n\n\t\tvar objects = this._objects,\n\t\t\tnCachedObjects = this.nCachedObjects_,\n\t\t\tindicesByUUID = this._indicesByUUID,\n\t\t\tbindings = this._bindings,\n\t\t\tnBindings = bindings.length;\n\n\t\tfor ( var i = 0, n = arguments.length; i !== n; ++ i ) {\n\n\t\t\tvar object = arguments[ i ],\n\t\t\t\tuuid = object.uuid,\n\t\t\t\tindex = indicesByUUID[ uuid ];\n\n\t\t\tif ( index !== undefined && index >= nCachedObjects ) {\n\n\t\t\t\t// move existing object into the CACHED region\n\n\t\t\t\tvar lastCachedIndex = nCachedObjects ++,\n\t\t\t\t\tfirstActiveObject = objects[ lastCachedIndex ];\n\n\t\t\t\tindicesByUUID[ firstActiveObject.uuid ] = index;\n\t\t\t\tobjects[ index ] = firstActiveObject;\n\n\t\t\t\tindicesByUUID[ uuid ] = lastCachedIndex;\n\t\t\t\tobjects[ lastCachedIndex ] = object;\n\n\t\t\t\t// accounting is done, now do the same for all bindings\n\n\t\t\t\tfor ( var j = 0, m = nBindings; j !== m; ++ j ) {\n\n\t\t\t\t\tvar bindingsForPath = bindings[ j ],\n\t\t\t\t\t\tfirstActive = bindingsForPath[ lastCachedIndex ],\n\t\t\t\t\t\tbinding = bindingsForPath[ index ];\n\n\t\t\t\t\tbindingsForPath[ index ] = firstActive;\n\t\t\t\t\tbindingsForPath[ lastCachedIndex ] = binding;\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t} // for arguments\n\n\t\tthis.nCachedObjects_ = nCachedObjects;\n\n\t},\n\n\t// remove & forget\n\tuncache: function () {\n\n\t\tvar objects = this._objects,\n\t\t\tnObjects = objects.length,\n\t\t\tnCachedObjects = this.nCachedObjects_,\n\t\t\tindicesByUUID = this._indicesByUUID,\n\t\t\tbindings = this._bindings,\n\t\t\tnBindings = bindings.length;\n\n\t\tfor ( var i = 0, n = arguments.length; i !== n; ++ i ) {\n\n\t\t\tvar object = arguments[ i ],\n\t\t\t\tuuid = object.uuid,\n\t\t\t\tindex = indicesByUUID[ uuid ];\n\n\t\t\tif ( index !== undefined ) {\n\n\t\t\t\tdelete indicesByUUID[ uuid ];\n\n\t\t\t\tif ( index < nCachedObjects ) {\n\n\t\t\t\t\t// object is cached, shrink the CACHED region\n\n\t\t\t\t\tvar firstActiveIndex = -- nCachedObjects,\n\t\t\t\t\t\tlastCachedObject = objects[ firstActiveIndex ],\n\t\t\t\t\t\tlastIndex = -- nObjects,\n\t\t\t\t\t\tlastObject = objects[ lastIndex ];\n\n\t\t\t\t\t// last cached object takes this object's place\n\t\t\t\t\tindicesByUUID[ lastCachedObject.uuid ] = index;\n\t\t\t\t\tobjects[ index ] = lastCachedObject;\n\n\t\t\t\t\t// last object goes to the activated slot and pop\n\t\t\t\t\tindicesByUUID[ lastObject.uuid ] = firstActiveIndex;\n\t\t\t\t\tobjects[ firstActiveIndex ] = lastObject;\n\t\t\t\t\tobjects.pop();\n\n\t\t\t\t\t// accounting is done, now do the same for all bindings\n\n\t\t\t\t\tfor ( var j = 0, m = nBindings; j !== m; ++ j ) {\n\n\t\t\t\t\t\tvar bindingsForPath = bindings[ j ],\n\t\t\t\t\t\t\tlastCached = bindingsForPath[ firstActiveIndex ],\n\t\t\t\t\t\t\tlast = bindingsForPath[ lastIndex ];\n\n\t\t\t\t\t\tbindingsForPath[ index ] = lastCached;\n\t\t\t\t\t\tbindingsForPath[ firstActiveIndex ] = last;\n\t\t\t\t\t\tbindingsForPath.pop();\n\n\t\t\t\t\t}\n\n\t\t\t\t} else {\n\n\t\t\t\t\t// object is active, just swap with the last and pop\n\n\t\t\t\t\tvar lastIndex = -- nObjects,\n\t\t\t\t\t\tlastObject = objects[ lastIndex ];\n\n\t\t\t\t\tindicesByUUID[ lastObject.uuid ] = index;\n\t\t\t\t\tobjects[ index ] = lastObject;\n\t\t\t\t\tobjects.pop();\n\n\t\t\t\t\t// accounting is done, now do the same for all bindings\n\n\t\t\t\t\tfor ( var j = 0, m = nBindings; j !== m; ++ j ) {\n\n\t\t\t\t\t\tvar bindingsForPath = bindings[ j ];\n\n\t\t\t\t\t\tbindingsForPath[ index ] = bindingsForPath[ lastIndex ];\n\t\t\t\t\t\tbindingsForPath.pop();\n\n\t\t\t\t\t}\n\n\t\t\t\t} // cached or active\n\n\t\t\t} // if object is known\n\n\t\t} // for arguments\n\n\t\tthis.nCachedObjects_ = nCachedObjects;\n\n\t},\n\n\t// Internal interface used by befriended PropertyBinding.Composite:\n\n\tsubscribe_: function ( path, parsedPath ) {\n\n\t\t// returns an array of bindings for the given path that is changed\n\t\t// according to the contained objects in the group\n\n\t\tvar indicesByPath = this._bindingsIndicesByPath,\n\t\t\tindex = indicesByPath[ path ],\n\t\t\tbindings = this._bindings;\n\n\t\tif ( index !== undefined ) return bindings[ index ];\n\n\t\tvar paths = this._paths,\n\t\t\tparsedPaths = this._parsedPaths,\n\t\t\tobjects = this._objects,\n\t\t\tnObjects = objects.length,\n\t\t\tnCachedObjects = this.nCachedObjects_,\n\t\t\tbindingsForPath = new Array( nObjects );\n\n\t\tindex = bindings.length;\n\n\t\tindicesByPath[ path ] = index;\n\n\t\tpaths.push( path );\n\t\tparsedPaths.push( parsedPath );\n\t\tbindings.push( bindingsForPath );\n\n\t\tfor ( var i = nCachedObjects, n = objects.length; i !== n; ++ i ) {\n\n\t\t\tvar object = objects[ i ];\n\t\t\tbindingsForPath[ i ] = new PropertyBinding( object, path, parsedPath );\n\n\t\t}\n\n\t\treturn bindingsForPath;\n\n\t},\n\n\tunsubscribe_: function ( path ) {\n\n\t\t// tells the group to forget about a property path and no longer\n\t\t// update the array previously obtained with 'subscribe_'\n\n\t\tvar indicesByPath = this._bindingsIndicesByPath,\n\t\t\tindex = indicesByPath[ path ];\n\n\t\tif ( index !== undefined ) {\n\n\t\t\tvar paths = this._paths,\n\t\t\t\tparsedPaths = this._parsedPaths,\n\t\t\t\tbindings = this._bindings,\n\t\t\t\tlastBindingsIndex = bindings.length - 1,\n\t\t\t\tlastBindings = bindings[ lastBindingsIndex ],\n\t\t\t\tlastBindingsPath = path[ lastBindingsIndex ];\n\n\t\t\tindicesByPath[ lastBindingsPath ] = index;\n\n\t\t\tbindings[ index ] = lastBindings;\n\t\t\tbindings.pop();\n\n\t\t\tparsedPaths[ index ] = parsedPaths[ lastBindingsIndex ];\n\t\t\tparsedPaths.pop();\n\n\t\t\tpaths[ index ] = paths[ lastBindingsIndex ];\n\t\t\tpaths.pop();\n\n\t\t}\n\n\t}\n\n} );\n\n/**\n *\n * Action provided by AnimationMixer for scheduling clip playback on specific\n * objects.\n *\n * @author Ben Houston / http://clara.io/\n * @author David Sarno / http://lighthaus.us/\n * @author tschw\n *\n */\n\nfunction AnimationAction( mixer, clip, localRoot ) {\n\n\tthis._mixer = mixer;\n\tthis._clip = clip;\n\tthis._localRoot = localRoot || null;\n\n\tvar tracks = clip.tracks,\n\t\tnTracks = tracks.length,\n\t\tinterpolants = new Array( nTracks );\n\n\tvar interpolantSettings = {\n\t\tendingStart: ZeroCurvatureEnding,\n\t\tendingEnd: ZeroCurvatureEnding\n\t};\n\n\tfor ( var i = 0; i !== nTracks; ++ i ) {\n\n\t\tvar interpolant = tracks[ i ].createInterpolant( null );\n\t\tinterpolants[ i ] = interpolant;\n\t\tinterpolant.settings = interpolantSettings;\n\n\t}\n\n\tthis._interpolantSettings = interpolantSettings;\n\n\tthis._interpolants = interpolants; // bound by the mixer\n\n\t// inside: PropertyMixer (managed by the mixer)\n\tthis._propertyBindings = new Array( nTracks );\n\n\tthis._cacheIndex = null; // for the memory manager\n\tthis._byClipCacheIndex = null; // for the memory manager\n\n\tthis._timeScaleInterpolant = null;\n\tthis._weightInterpolant = null;\n\n\tthis.loop = LoopRepeat;\n\tthis._loopCount = - 1;\n\n\t// global mixer time when the action is to be started\n\t// it's set back to 'null' upon start of the action\n\tthis._startTime = null;\n\n\t// scaled local time of the action\n\t// gets clamped or wrapped to 0..clip.duration according to loop\n\tthis.time = 0;\n\n\tthis.timeScale = 1;\n\tthis._effectiveTimeScale = 1;\n\n\tthis.weight = 1;\n\tthis._effectiveWeight = 1;\n\n\tthis.repetitions = Infinity; // no. of repetitions when looping\n\n\tthis.paused = false; // true -> zero effective time scale\n\tthis.enabled = true; // false -> zero effective weight\n\n\tthis.clampWhenFinished = false;// keep feeding the last frame?\n\n\tthis.zeroSlopeAtStart = true;// for smooth interpolation w/o separate\n\tthis.zeroSlopeAtEnd = true;// clips for start, loop and end\n\n}\n\nObject.assign( AnimationAction.prototype, {\n\n\t// State & Scheduling\n\n\tplay: function () {\n\n\t\tthis._mixer._activateAction( this );\n\n\t\treturn this;\n\n\t},\n\n\tstop: function () {\n\n\t\tthis._mixer._deactivateAction( this );\n\n\t\treturn this.reset();\n\n\t},\n\n\treset: function () {\n\n\t\tthis.paused = false;\n\t\tthis.enabled = true;\n\n\t\tthis.time = 0; // restart clip\n\t\tthis._loopCount = - 1;// forget previous loops\n\t\tthis._startTime = null;// forget scheduling\n\n\t\treturn this.stopFading().stopWarping();\n\n\t},\n\n\tisRunning: function () {\n\n\t\treturn this.enabled && ! this.paused && this.timeScale !== 0 &&\n\t\t\tthis._startTime === null && this._mixer._isActiveAction( this );\n\n\t},\n\n\t// return true when play has been called\n\tisScheduled: function () {\n\n\t\treturn this._mixer._isActiveAction( this );\n\n\t},\n\n\tstartAt: function ( time ) {\n\n\t\tthis._startTime = time;\n\n\t\treturn this;\n\n\t},\n\n\tsetLoop: function ( mode, repetitions ) {\n\n\t\tthis.loop = mode;\n\t\tthis.repetitions = repetitions;\n\n\t\treturn this;\n\n\t},\n\n\t// Weight\n\n\t// set the weight stopping any scheduled fading\n\t// although .enabled = false yields an effective weight of zero, this\n\t// method does *not* change .enabled, because it would be confusing\n\tsetEffectiveWeight: function ( weight ) {\n\n\t\tthis.weight = weight;\n\n\t\t// note: same logic as when updated at runtime\n\t\tthis._effectiveWeight = this.enabled ? weight : 0;\n\n\t\treturn this.stopFading();\n\n\t},\n\n\t// return the weight considering fading and .enabled\n\tgetEffectiveWeight: function () {\n\n\t\treturn this._effectiveWeight;\n\n\t},\n\n\tfadeIn: function ( duration ) {\n\n\t\treturn this._scheduleFading( duration, 0, 1 );\n\n\t},\n\n\tfadeOut: function ( duration ) {\n\n\t\treturn this._scheduleFading( duration, 1, 0 );\n\n\t},\n\n\tcrossFadeFrom: function ( fadeOutAction, duration, warp ) {\n\n\t\tfadeOutAction.fadeOut( duration );\n\t\tthis.fadeIn( duration );\n\n\t\tif ( warp ) {\n\n\t\t\tvar fadeInDuration = this._clip.duration,\n\t\t\t\tfadeOutDuration = fadeOutAction._clip.duration,\n\n\t\t\t\tstartEndRatio = fadeOutDuration / fadeInDuration,\n\t\t\t\tendStartRatio = fadeInDuration / fadeOutDuration;\n\n\t\t\tfadeOutAction.warp( 1.0, startEndRatio, duration );\n\t\t\tthis.warp( endStartRatio, 1.0, duration );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tcrossFadeTo: function ( fadeInAction, duration, warp ) {\n\n\t\treturn fadeInAction.crossFadeFrom( this, duration, warp );\n\n\t},\n\n\tstopFading: function () {\n\n\t\tvar weightInterpolant = this._weightInterpolant;\n\n\t\tif ( weightInterpolant !== null ) {\n\n\t\t\tthis._weightInterpolant = null;\n\t\t\tthis._mixer._takeBackControlInterpolant( weightInterpolant );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\t// Time Scale Control\n\n\t// set the time scale stopping any scheduled warping\n\t// although .paused = true yields an effective time scale of zero, this\n\t// method does *not* change .paused, because it would be confusing\n\tsetEffectiveTimeScale: function ( timeScale ) {\n\n\t\tthis.timeScale = timeScale;\n\t\tthis._effectiveTimeScale = this.paused ? 0 : timeScale;\n\n\t\treturn this.stopWarping();\n\n\t},\n\n\t// return the time scale considering warping and .paused\n\tgetEffectiveTimeScale: function () {\n\n\t\treturn this._effectiveTimeScale;\n\n\t},\n\n\tsetDuration: function ( duration ) {\n\n\t\tthis.timeScale = this._clip.duration / duration;\n\n\t\treturn this.stopWarping();\n\n\t},\n\n\tsyncWith: function ( action ) {\n\n\t\tthis.time = action.time;\n\t\tthis.timeScale = action.timeScale;\n\n\t\treturn this.stopWarping();\n\n\t},\n\n\thalt: function ( duration ) {\n\n\t\treturn this.warp( this._effectiveTimeScale, 0, duration );\n\n\t},\n\n\twarp: function ( startTimeScale, endTimeScale, duration ) {\n\n\t\tvar mixer = this._mixer, now = mixer.time,\n\t\t\tinterpolant = this._timeScaleInterpolant,\n\n\t\t\ttimeScale = this.timeScale;\n\n\t\tif ( interpolant === null ) {\n\n\t\t\tinterpolant = mixer._lendControlInterpolant();\n\t\t\tthis._timeScaleInterpolant = interpolant;\n\n\t\t}\n\n\t\tvar times = interpolant.parameterPositions,\n\t\t\tvalues = interpolant.sampleValues;\n\n\t\ttimes[ 0 ] = now;\n\t\ttimes[ 1 ] = now + duration;\n\n\t\tvalues[ 0 ] = startTimeScale / timeScale;\n\t\tvalues[ 1 ] = endTimeScale / timeScale;\n\n\t\treturn this;\n\n\t},\n\n\tstopWarping: function () {\n\n\t\tvar timeScaleInterpolant = this._timeScaleInterpolant;\n\n\t\tif ( timeScaleInterpolant !== null ) {\n\n\t\t\tthis._timeScaleInterpolant = null;\n\t\t\tthis._mixer._takeBackControlInterpolant( timeScaleInterpolant );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\t// Object Accessors\n\n\tgetMixer: function () {\n\n\t\treturn this._mixer;\n\n\t},\n\n\tgetClip: function () {\n\n\t\treturn this._clip;\n\n\t},\n\n\tgetRoot: function () {\n\n\t\treturn this._localRoot || this._mixer._root;\n\n\t},\n\n\t// Interna\n\n\t_update: function ( time, deltaTime, timeDirection, accuIndex ) {\n\n\t\t// called by the mixer\n\n\t\tif ( ! this.enabled ) {\n\n\t\t\t// call ._updateWeight() to update ._effectiveWeight\n\n\t\t\tthis._updateWeight( time );\n\t\t\treturn;\n\n\t\t}\n\n\t\tvar startTime = this._startTime;\n\n\t\tif ( startTime !== null ) {\n\n\t\t\t// check for scheduled start of action\n\n\t\t\tvar timeRunning = ( time - startTime ) * timeDirection;\n\t\t\tif ( timeRunning < 0 || timeDirection === 0 ) {\n\n\t\t\t\treturn; // yet to come / don't decide when delta = 0\n\n\t\t\t}\n\n\t\t\t// start\n\n\t\t\tthis._startTime = null; // unschedule\n\t\t\tdeltaTime = timeDirection * timeRunning;\n\n\t\t}\n\n\t\t// apply time scale and advance time\n\n\t\tdeltaTime *= this._updateTimeScale( time );\n\t\tvar clipTime = this._updateTime( deltaTime );\n\n\t\t// note: _updateTime may disable the action resulting in\n\t\t// an effective weight of 0\n\n\t\tvar weight = this._updateWeight( time );\n\n\t\tif ( weight > 0 ) {\n\n\t\t\tvar interpolants = this._interpolants;\n\t\t\tvar propertyMixers = this._propertyBindings;\n\n\t\t\tfor ( var j = 0, m = interpolants.length; j !== m; ++ j ) {\n\n\t\t\t\tinterpolants[ j ].evaluate( clipTime );\n\t\t\t\tpropertyMixers[ j ].accumulate( accuIndex, weight );\n\n\t\t\t}\n\n\t\t}\n\n\t},\n\n\t_updateWeight: function ( time ) {\n\n\t\tvar weight = 0;\n\n\t\tif ( this.enabled ) {\n\n\t\t\tweight = this.weight;\n\t\t\tvar interpolant = this._weightInterpolant;\n\n\t\t\tif ( interpolant !== null ) {\n\n\t\t\t\tvar interpolantValue = interpolant.evaluate( time )[ 0 ];\n\n\t\t\t\tweight *= interpolantValue;\n\n\t\t\t\tif ( time > interpolant.parameterPositions[ 1 ] ) {\n\n\t\t\t\t\tthis.stopFading();\n\n\t\t\t\t\tif ( interpolantValue === 0 ) {\n\n\t\t\t\t\t\t// faded out, disable\n\t\t\t\t\t\tthis.enabled = false;\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\tthis._effectiveWeight = weight;\n\t\treturn weight;\n\n\t},\n\n\t_updateTimeScale: function ( time ) {\n\n\t\tvar timeScale = 0;\n\n\t\tif ( ! this.paused ) {\n\n\t\t\ttimeScale = this.timeScale;\n\n\t\t\tvar interpolant = this._timeScaleInterpolant;\n\n\t\t\tif ( interpolant !== null ) {\n\n\t\t\t\tvar interpolantValue = interpolant.evaluate( time )[ 0 ];\n\n\t\t\t\ttimeScale *= interpolantValue;\n\n\t\t\t\tif ( time > interpolant.parameterPositions[ 1 ] ) {\n\n\t\t\t\t\tthis.stopWarping();\n\n\t\t\t\t\tif ( timeScale === 0 ) {\n\n\t\t\t\t\t\t// motion has halted, pause\n\t\t\t\t\t\tthis.paused = true;\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\t// warp done - apply final time scale\n\t\t\t\t\t\tthis.timeScale = timeScale;\n\n\t\t\t\t\t}\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t}\n\n\t\tthis._effectiveTimeScale = timeScale;\n\t\treturn timeScale;\n\n\t},\n\n\t_updateTime: function ( deltaTime ) {\n\n\t\tvar time = this.time + deltaTime;\n\t\tvar duration = this._clip.duration;\n\t\tvar loop = this.loop;\n\t\tvar loopCount = this._loopCount;\n\n\t\tvar pingPong = ( loop === LoopPingPong );\n\n\t\tif ( deltaTime === 0 ) {\n\n\t\t\tif ( loopCount === - 1 ) return time;\n\n\t\t\treturn ( pingPong && ( loopCount & 1 ) === 1 ) ? duration - time : time;\n\n\t\t}\n\n\t\tif ( loop === LoopOnce ) {\n\n\t\t\tif ( loopCount === - 1 ) {\n\n\t\t\t\t// just started\n\n\t\t\t\tthis._loopCount = 0;\n\t\t\t\tthis._setEndings( true, true, false );\n\n\t\t\t}\n\n\t\t\thandle_stop: {\n\n\t\t\t\tif ( time >= duration ) {\n\n\t\t\t\t\ttime = duration;\n\n\t\t\t\t} else if ( time < 0 ) {\n\n\t\t\t\t\ttime = 0;\n\n\t\t\t\t} else {\n\n\t\t\t\t\tthis.time = time;\n\n\t\t\t\t\tbreak handle_stop;\n\n\t\t\t\t}\n\n\t\t\t\tif ( this.clampWhenFinished ) this.paused = true;\n\t\t\t\telse this.enabled = false;\n\n\t\t\t\tthis.time = time;\n\n\t\t\t\tthis._mixer.dispatchEvent( {\n\t\t\t\t\ttype: 'finished', action: this,\n\t\t\t\t\tdirection: deltaTime < 0 ? - 1 : 1\n\t\t\t\t} );\n\n\t\t\t}\n\n\t\t} else { // repetitive Repeat or PingPong\n\n\t\t\tif ( loopCount === - 1 ) {\n\n\t\t\t\t// just started\n\n\t\t\t\tif ( deltaTime >= 0 ) {\n\n\t\t\t\t\tloopCount = 0;\n\n\t\t\t\t\tthis._setEndings( true, this.repetitions === 0, pingPong );\n\n\t\t\t\t} else {\n\n\t\t\t\t\t// when looping in reverse direction, the initial\n\t\t\t\t\t// transition through zero counts as a repetition,\n\t\t\t\t\t// so leave loopCount at -1\n\n\t\t\t\t\tthis._setEndings( this.repetitions === 0, true, pingPong );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tif ( time >= duration || time < 0 ) {\n\n\t\t\t\t// wrap around\n\n\t\t\t\tvar loopDelta = Math.floor( time / duration ); // signed\n\t\t\t\ttime -= duration * loopDelta;\n\n\t\t\t\tloopCount += Math.abs( loopDelta );\n\n\t\t\t\tvar pending = this.repetitions - loopCount;\n\n\t\t\t\tif ( pending <= 0 ) {\n\n\t\t\t\t\t// have to stop (switch state, clamp time, fire event)\n\n\t\t\t\t\tif ( this.clampWhenFinished ) this.paused = true;\n\t\t\t\t\telse this.enabled = false;\n\n\t\t\t\t\ttime = deltaTime > 0 ? duration : 0;\n\n\t\t\t\t\tthis.time = time;\n\n\t\t\t\t\tthis._mixer.dispatchEvent( {\n\t\t\t\t\t\ttype: 'finished', action: this,\n\t\t\t\t\t\tdirection: deltaTime > 0 ? 1 : - 1\n\t\t\t\t\t} );\n\n\t\t\t\t} else {\n\n\t\t\t\t\t// keep running\n\n\t\t\t\t\tif ( pending === 1 ) {\n\n\t\t\t\t\t\t// entering the last round\n\n\t\t\t\t\t\tvar atStart = deltaTime < 0;\n\t\t\t\t\t\tthis._setEndings( atStart, ! atStart, pingPong );\n\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\tthis._setEndings( false, false, pingPong );\n\n\t\t\t\t\t}\n\n\t\t\t\t\tthis._loopCount = loopCount;\n\n\t\t\t\t\tthis.time = time;\n\n\t\t\t\t\tthis._mixer.dispatchEvent( {\n\t\t\t\t\t\ttype: 'loop', action: this, loopDelta: loopDelta\n\t\t\t\t\t} );\n\n\t\t\t\t}\n\n\t\t\t} else {\n\n\t\t\t\tthis.time = time;\n\n\t\t\t}\n\n\t\t\tif ( pingPong && ( loopCount & 1 ) === 1 ) {\n\n\t\t\t\t// invert time for the \"pong round\"\n\n\t\t\t\treturn duration - time;\n\n\t\t\t}\n\n\t\t}\n\n\t\treturn time;\n\n\t},\n\n\t_setEndings: function ( atStart, atEnd, pingPong ) {\n\n\t\tvar settings = this._interpolantSettings;\n\n\t\tif ( pingPong ) {\n\n\t\t\tsettings.endingStart = ZeroSlopeEnding;\n\t\t\tsettings.endingEnd = ZeroSlopeEnding;\n\n\t\t} else {\n\n\t\t\t// assuming for LoopOnce atStart == atEnd == true\n\n\t\t\tif ( atStart ) {\n\n\t\t\t\tsettings.endingStart = this.zeroSlopeAtStart ? ZeroSlopeEnding : ZeroCurvatureEnding;\n\n\t\t\t} else {\n\n\t\t\t\tsettings.endingStart = WrapAroundEnding;\n\n\t\t\t}\n\n\t\t\tif ( atEnd ) {\n\n\t\t\t\tsettings.endingEnd = this.zeroSlopeAtEnd ? ZeroSlopeEnding : ZeroCurvatureEnding;\n\n\t\t\t} else {\n\n\t\t\t\tsettings.endingEnd \t = WrapAroundEnding;\n\n\t\t\t}\n\n\t\t}\n\n\t},\n\n\t_scheduleFading: function ( duration, weightNow, weightThen ) {\n\n\t\tvar mixer = this._mixer, now = mixer.time,\n\t\t\tinterpolant = this._weightInterpolant;\n\n\t\tif ( interpolant === null ) {\n\n\t\t\tinterpolant = mixer._lendControlInterpolant();\n\t\t\tthis._weightInterpolant = interpolant;\n\n\t\t}\n\n\t\tvar times = interpolant.parameterPositions,\n\t\t\tvalues = interpolant.sampleValues;\n\n\t\ttimes[ 0 ] = now;\n\t\tvalues[ 0 ] = weightNow;\n\t\ttimes[ 1 ] = now + duration;\n\t\tvalues[ 1 ] = weightThen;\n\n\t\treturn this;\n\n\t}\n\n} );\n\n/**\n *\n * Player for AnimationClips.\n *\n *\n * @author Ben Houston / http://clara.io/\n * @author David Sarno / http://lighthaus.us/\n * @author tschw\n */\n\nfunction AnimationMixer( root ) {\n\n\tthis._root = root;\n\tthis._initMemoryManager();\n\tthis._accuIndex = 0;\n\n\tthis.time = 0;\n\n\tthis.timeScale = 1.0;\n\n}\n\nAnimationMixer.prototype = Object.assign( Object.create( EventDispatcher.prototype ), {\n\n\tconstructor: AnimationMixer,\n\n\t_bindAction: function ( action, prototypeAction ) {\n\n\t\tvar root = action._localRoot || this._root,\n\t\t\ttracks = action._clip.tracks,\n\t\t\tnTracks = tracks.length,\n\t\t\tbindings = action._propertyBindings,\n\t\t\tinterpolants = action._interpolants,\n\t\t\trootUuid = root.uuid,\n\t\t\tbindingsByRoot = this._bindingsByRootAndName,\n\t\t\tbindingsByName = bindingsByRoot[ rootUuid ];\n\n\t\tif ( bindingsByName === undefined ) {\n\n\t\t\tbindingsByName = {};\n\t\t\tbindingsByRoot[ rootUuid ] = bindingsByName;\n\n\t\t}\n\n\t\tfor ( var i = 0; i !== nTracks; ++ i ) {\n\n\t\t\tvar track = tracks[ i ],\n\t\t\t\ttrackName = track.name,\n\t\t\t\tbinding = bindingsByName[ trackName ];\n\n\t\t\tif ( binding !== undefined ) {\n\n\t\t\t\tbindings[ i ] = binding;\n\n\t\t\t} else {\n\n\t\t\t\tbinding = bindings[ i ];\n\n\t\t\t\tif ( binding !== undefined ) {\n\n\t\t\t\t\t// existing binding, make sure the cache knows\n\n\t\t\t\t\tif ( binding._cacheIndex === null ) {\n\n\t\t\t\t\t\t++ binding.referenceCount;\n\t\t\t\t\t\tthis._addInactiveBinding( binding, rootUuid, trackName );\n\n\t\t\t\t\t}\n\n\t\t\t\t\tcontinue;\n\n\t\t\t\t}\n\n\t\t\t\tvar path = prototypeAction && prototypeAction.\n\t\t\t\t\t_propertyBindings[ i ].binding.parsedPath;\n\n\t\t\t\tbinding = new PropertyMixer(\n\t\t\t\t\tPropertyBinding.create( root, trackName, path ),\n\t\t\t\t\ttrack.ValueTypeName, track.getValueSize() );\n\n\t\t\t\t++ binding.referenceCount;\n\t\t\t\tthis._addInactiveBinding( binding, rootUuid, trackName );\n\n\t\t\t\tbindings[ i ] = binding;\n\n\t\t\t}\n\n\t\t\tinterpolants[ i ].resultBuffer = binding.buffer;\n\n\t\t}\n\n\t},\n\n\t_activateAction: function ( action ) {\n\n\t\tif ( ! this._isActiveAction( action ) ) {\n\n\t\t\tif ( action._cacheIndex === null ) {\n\n\t\t\t\t// this action has been forgotten by the cache, but the user\n\t\t\t\t// appears to be still using it -> rebind\n\n\t\t\t\tvar rootUuid = ( action._localRoot || this._root ).uuid,\n\t\t\t\t\tclipUuid = action._clip.uuid,\n\t\t\t\t\tactionsForClip = this._actionsByClip[ clipUuid ];\n\n\t\t\t\tthis._bindAction( action,\n\t\t\t\t\tactionsForClip && actionsForClip.knownActions[ 0 ] );\n\n\t\t\t\tthis._addInactiveAction( action, clipUuid, rootUuid );\n\n\t\t\t}\n\n\t\t\tvar bindings = action._propertyBindings;\n\n\t\t\t// increment reference counts / sort out state\n\t\t\tfor ( var i = 0, n = bindings.length; i !== n; ++ i ) {\n\n\t\t\t\tvar binding = bindings[ i ];\n\n\t\t\t\tif ( binding.useCount ++ === 0 ) {\n\n\t\t\t\t\tthis._lendBinding( binding );\n\t\t\t\t\tbinding.saveOriginalState();\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tthis._lendAction( action );\n\n\t\t}\n\n\t},\n\n\t_deactivateAction: function ( action ) {\n\n\t\tif ( this._isActiveAction( action ) ) {\n\n\t\t\tvar bindings = action._propertyBindings;\n\n\t\t\t// decrement reference counts / sort out state\n\t\t\tfor ( var i = 0, n = bindings.length; i !== n; ++ i ) {\n\n\t\t\t\tvar binding = bindings[ i ];\n\n\t\t\t\tif ( -- binding.useCount === 0 ) {\n\n\t\t\t\t\tbinding.restoreOriginalState();\n\t\t\t\t\tthis._takeBackBinding( binding );\n\n\t\t\t\t}\n\n\t\t\t}\n\n\t\t\tthis._takeBackAction( action );\n\n\t\t}\n\n\t},\n\n\t// Memory manager\n\n\t_initMemoryManager: function () {\n\n\t\tthis._actions = []; // 'nActiveActions' followed by inactive ones\n\t\tthis._nActiveActions = 0;\n\n\t\tthis._actionsByClip = {};\n\t\t// inside:\n\t\t// {\n\t\t// \tknownActions: Array< AnimationAction > - used as prototypes\n\t\t// \tactionByRoot: AnimationAction - lookup\n\t\t// }\n\n\n\t\tthis._bindings = []; // 'nActiveBindings' followed by inactive ones\n\t\tthis._nActiveBindings = 0;\n\n\t\tthis._bindingsByRootAndName = {}; // inside: Map< name, PropertyMixer >\n\n\n\t\tthis._controlInterpolants = []; // same game as above\n\t\tthis._nActiveControlInterpolants = 0;\n\n\t\tvar scope = this;\n\n\t\tthis.stats = {\n\n\t\t\tactions: {\n\t\t\t\tget total() {\n\n\t\t\t\t\treturn scope._actions.length;\n\n\t\t\t\t},\n\t\t\t\tget inUse() {\n\n\t\t\t\t\treturn scope._nActiveActions;\n\n\t\t\t\t}\n\t\t\t},\n\t\t\tbindings: {\n\t\t\t\tget total() {\n\n\t\t\t\t\treturn scope._bindings.length;\n\n\t\t\t\t},\n\t\t\t\tget inUse() {\n\n\t\t\t\t\treturn scope._nActiveBindings;\n\n\t\t\t\t}\n\t\t\t},\n\t\t\tcontrolInterpolants: {\n\t\t\t\tget total() {\n\n\t\t\t\t\treturn scope._controlInterpolants.length;\n\n\t\t\t\t},\n\t\t\t\tget inUse() {\n\n\t\t\t\t\treturn scope._nActiveControlInterpolants;\n\n\t\t\t\t}\n\t\t\t}\n\n\t\t};\n\n\t},\n\n\t// Memory management for AnimationAction objects\n\n\t_isActiveAction: function ( action ) {\n\n\t\tvar index = action._cacheIndex;\n\t\treturn index !== null && index < this._nActiveActions;\n\n\t},\n\n\t_addInactiveAction: function ( action, clipUuid, rootUuid ) {\n\n\t\tvar actions = this._actions,\n\t\t\tactionsByClip = this._actionsByClip,\n\t\t\tactionsForClip = actionsByClip[ clipUuid ];\n\n\t\tif ( actionsForClip === undefined ) {\n\n\t\t\tactionsForClip = {\n\n\t\t\t\tknownActions: [ action ],\n\t\t\t\tactionByRoot: {}\n\n\t\t\t};\n\n\t\t\taction._byClipCacheIndex = 0;\n\n\t\t\tactionsByClip[ clipUuid ] = actionsForClip;\n\n\t\t} else {\n\n\t\t\tvar knownActions = actionsForClip.knownActions;\n\n\t\t\taction._byClipCacheIndex = knownActions.length;\n\t\t\tknownActions.push( action );\n\n\t\t}\n\n\t\taction._cacheIndex = actions.length;\n\t\tactions.push( action );\n\n\t\tactionsForClip.actionByRoot[ rootUuid ] = action;\n\n\t},\n\n\t_removeInactiveAction: function ( action ) {\n\n\t\tvar actions = this._actions,\n\t\t\tlastInactiveAction = actions[ actions.length - 1 ],\n\t\t\tcacheIndex = action._cacheIndex;\n\n\t\tlastInactiveAction._cacheIndex = cacheIndex;\n\t\tactions[ cacheIndex ] = lastInactiveAction;\n\t\tactions.pop();\n\n\t\taction._cacheIndex = null;\n\n\n\t\tvar clipUuid = action._clip.uuid,\n\t\t\tactionsByClip = this._actionsByClip,\n\t\t\tactionsForClip = actionsByClip[ clipUuid ],\n\t\t\tknownActionsForClip = actionsForClip.knownActions,\n\n\t\t\tlastKnownAction =\n\t\t\t\tknownActionsForClip[ knownActionsForClip.length - 1 ],\n\n\t\t\tbyClipCacheIndex = action._byClipCacheIndex;\n\n\t\tlastKnownAction._byClipCacheIndex = byClipCacheIndex;\n\t\tknownActionsForClip[ byClipCacheIndex ] = lastKnownAction;\n\t\tknownActionsForClip.pop();\n\n\t\taction._byClipCacheIndex = null;\n\n\n\t\tvar actionByRoot = actionsForClip.actionByRoot,\n\t\t\trootUuid = ( action._localRoot || this._root ).uuid;\n\n\t\tdelete actionByRoot[ rootUuid ];\n\n\t\tif ( knownActionsForClip.length === 0 ) {\n\n\t\t\tdelete actionsByClip[ clipUuid ];\n\n\t\t}\n\n\t\tthis._removeInactiveBindingsForAction( action );\n\n\t},\n\n\t_removeInactiveBindingsForAction: function ( action ) {\n\n\t\tvar bindings = action._propertyBindings;\n\t\tfor ( var i = 0, n = bindings.length; i !== n; ++ i ) {\n\n\t\t\tvar binding = bindings[ i ];\n\n\t\t\tif ( -- binding.referenceCount === 0 ) {\n\n\t\t\t\tthis._removeInactiveBinding( binding );\n\n\t\t\t}\n\n\t\t}\n\n\t},\n\n\t_lendAction: function ( action ) {\n\n\t\t// [ active actions |  inactive actions  ]\n\t\t// [  active actions >| inactive actions ]\n\t\t//                 s        a\n\t\t//                  <-swap->\n\t\t//                 a        s\n\n\t\tvar actions = this._actions,\n\t\t\tprevIndex = action._cacheIndex,\n\n\t\t\tlastActiveIndex = this._nActiveActions ++,\n\n\t\t\tfirstInactiveAction = actions[ lastActiveIndex ];\n\n\t\taction._cacheIndex = lastActiveIndex;\n\t\tactions[ lastActiveIndex ] = action;\n\n\t\tfirstInactiveAction._cacheIndex = prevIndex;\n\t\tactions[ prevIndex ] = firstInactiveAction;\n\n\t},\n\n\t_takeBackAction: function ( action ) {\n\n\t\t// [  active actions  | inactive actions ]\n\t\t// [ active actions |< inactive actions  ]\n\t\t//        a        s\n\t\t//         <-swap->\n\t\t//        s        a\n\n\t\tvar actions = this._actions,\n\t\t\tprevIndex = action._cacheIndex,\n\n\t\t\tfirstInactiveIndex = -- this._nActiveActions,\n\n\t\t\tlastActiveAction = actions[ firstInactiveIndex ];\n\n\t\taction._cacheIndex = firstInactiveIndex;\n\t\tactions[ firstInactiveIndex ] = action;\n\n\t\tlastActiveAction._cacheIndex = prevIndex;\n\t\tactions[ prevIndex ] = lastActiveAction;\n\n\t},\n\n\t// Memory management for PropertyMixer objects\n\n\t_addInactiveBinding: function ( binding, rootUuid, trackName ) {\n\n\t\tvar bindingsByRoot = this._bindingsByRootAndName,\n\t\t\tbindingByName = bindingsByRoot[ rootUuid ],\n\n\t\t\tbindings = this._bindings;\n\n\t\tif ( bindingByName === undefined ) {\n\n\t\t\tbindingByName = {};\n\t\t\tbindingsByRoot[ rootUuid ] = bindingByName;\n\n\t\t}\n\n\t\tbindingByName[ trackName ] = binding;\n\n\t\tbinding._cacheIndex = bindings.length;\n\t\tbindings.push( binding );\n\n\t},\n\n\t_removeInactiveBinding: function ( binding ) {\n\n\t\tvar bindings = this._bindings,\n\t\t\tpropBinding = binding.binding,\n\t\t\trootUuid = propBinding.rootNode.uuid,\n\t\t\ttrackName = propBinding.path,\n\t\t\tbindingsByRoot = this._bindingsByRootAndName,\n\t\t\tbindingByName = bindingsByRoot[ rootUuid ],\n\n\t\t\tlastInactiveBinding = bindings[ bindings.length - 1 ],\n\t\t\tcacheIndex = binding._cacheIndex;\n\n\t\tlastInactiveBinding._cacheIndex = cacheIndex;\n\t\tbindings[ cacheIndex ] = lastInactiveBinding;\n\t\tbindings.pop();\n\n\t\tdelete bindingByName[ trackName ];\n\n\t\tif ( Object.keys( bindingByName ).length === 0 ) {\n\n\t\t\tdelete bindingsByRoot[ rootUuid ];\n\n\t\t}\n\n\t},\n\n\t_lendBinding: function ( binding ) {\n\n\t\tvar bindings = this._bindings,\n\t\t\tprevIndex = binding._cacheIndex,\n\n\t\t\tlastActiveIndex = this._nActiveBindings ++,\n\n\t\t\tfirstInactiveBinding = bindings[ lastActiveIndex ];\n\n\t\tbinding._cacheIndex = lastActiveIndex;\n\t\tbindings[ lastActiveIndex ] = binding;\n\n\t\tfirstInactiveBinding._cacheIndex = prevIndex;\n\t\tbindings[ prevIndex ] = firstInactiveBinding;\n\n\t},\n\n\t_takeBackBinding: function ( binding ) {\n\n\t\tvar bindings = this._bindings,\n\t\t\tprevIndex = binding._cacheIndex,\n\n\t\t\tfirstInactiveIndex = -- this._nActiveBindings,\n\n\t\t\tlastActiveBinding = bindings[ firstInactiveIndex ];\n\n\t\tbinding._cacheIndex = firstInactiveIndex;\n\t\tbindings[ firstInactiveIndex ] = binding;\n\n\t\tlastActiveBinding._cacheIndex = prevIndex;\n\t\tbindings[ prevIndex ] = lastActiveBinding;\n\n\t},\n\n\n\t// Memory management of Interpolants for weight and time scale\n\n\t_lendControlInterpolant: function () {\n\n\t\tvar interpolants = this._controlInterpolants,\n\t\t\tlastActiveIndex = this._nActiveControlInterpolants ++,\n\t\t\tinterpolant = interpolants[ lastActiveIndex ];\n\n\t\tif ( interpolant === undefined ) {\n\n\t\t\tinterpolant = new LinearInterpolant(\n\t\t\t\tnew Float32Array( 2 ), new Float32Array( 2 ),\n\t\t\t\t1, this._controlInterpolantsResultBuffer );\n\n\t\t\tinterpolant.__cacheIndex = lastActiveIndex;\n\t\t\tinterpolants[ lastActiveIndex ] = interpolant;\n\n\t\t}\n\n\t\treturn interpolant;\n\n\t},\n\n\t_takeBackControlInterpolant: function ( interpolant ) {\n\n\t\tvar interpolants = this._controlInterpolants,\n\t\t\tprevIndex = interpolant.__cacheIndex,\n\n\t\t\tfirstInactiveIndex = -- this._nActiveControlInterpolants,\n\n\t\t\tlastActiveInterpolant = interpolants[ firstInactiveIndex ];\n\n\t\tinterpolant.__cacheIndex = firstInactiveIndex;\n\t\tinterpolants[ firstInactiveIndex ] = interpolant;\n\n\t\tlastActiveInterpolant.__cacheIndex = prevIndex;\n\t\tinterpolants[ prevIndex ] = lastActiveInterpolant;\n\n\t},\n\n\t_controlInterpolantsResultBuffer: new Float32Array( 1 ),\n\n\t// return an action for a clip optionally using a custom root target\n\t// object (this method allocates a lot of dynamic memory in case a\n\t// previously unknown clip/root combination is specified)\n\tclipAction: function ( clip, optionalRoot ) {\n\n\t\tvar root = optionalRoot || this._root,\n\t\t\trootUuid = root.uuid,\n\n\t\t\tclipObject = typeof clip === 'string' ?\n\t\t\t\tAnimationClip.findByName( root, clip ) : clip,\n\n\t\t\tclipUuid = clipObject !== null ? clipObject.uuid : clip,\n\n\t\t\tactionsForClip = this._actionsByClip[ clipUuid ],\n\t\t\tprototypeAction = null;\n\n\t\tif ( actionsForClip !== undefined ) {\n\n\t\t\tvar existingAction =\n\t\t\t\t\tactionsForClip.actionByRoot[ rootUuid ];\n\n\t\t\tif ( existingAction !== undefined ) {\n\n\t\t\t\treturn existingAction;\n\n\t\t\t}\n\n\t\t\t// we know the clip, so we don't have to parse all\n\t\t\t// the bindings again but can just copy\n\t\t\tprototypeAction = actionsForClip.knownActions[ 0 ];\n\n\t\t\t// also, take the clip from the prototype action\n\t\t\tif ( clipObject === null )\n\t\t\t\tclipObject = prototypeAction._clip;\n\n\t\t}\n\n\t\t// clip must be known when specified via string\n\t\tif ( clipObject === null ) return null;\n\n\t\t// allocate all resources required to run it\n\t\tvar newAction = new AnimationAction( this, clipObject, optionalRoot );\n\n\t\tthis._bindAction( newAction, prototypeAction );\n\n\t\t// and make the action known to the memory manager\n\t\tthis._addInactiveAction( newAction, clipUuid, rootUuid );\n\n\t\treturn newAction;\n\n\t},\n\n\t// get an existing action\n\texistingAction: function ( clip, optionalRoot ) {\n\n\t\tvar root = optionalRoot || this._root,\n\t\t\trootUuid = root.uuid,\n\n\t\t\tclipObject = typeof clip === 'string' ?\n\t\t\t\tAnimationClip.findByName( root, clip ) : clip,\n\n\t\t\tclipUuid = clipObject ? clipObject.uuid : clip,\n\n\t\t\tactionsForClip = this._actionsByClip[ clipUuid ];\n\n\t\tif ( actionsForClip !== undefined ) {\n\n\t\t\treturn actionsForClip.actionByRoot[ rootUuid ] || null;\n\n\t\t}\n\n\t\treturn null;\n\n\t},\n\n\t// deactivates all previously scheduled actions\n\tstopAllAction: function () {\n\n\t\tvar actions = this._actions,\n\t\t\tnActions = this._nActiveActions,\n\t\t\tbindings = this._bindings,\n\t\t\tnBindings = this._nActiveBindings;\n\n\t\tthis._nActiveActions = 0;\n\t\tthis._nActiveBindings = 0;\n\n\t\tfor ( var i = 0; i !== nActions; ++ i ) {\n\n\t\t\tactions[ i ].reset();\n\n\t\t}\n\n\t\tfor ( var i = 0; i !== nBindings; ++ i ) {\n\n\t\t\tbindings[ i ].useCount = 0;\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\t// advance the time and update apply the animation\n\tupdate: function ( deltaTime ) {\n\n\t\tdeltaTime *= this.timeScale;\n\n\t\tvar actions = this._actions,\n\t\t\tnActions = this._nActiveActions,\n\n\t\t\ttime = this.time += deltaTime,\n\t\t\ttimeDirection = Math.sign( deltaTime ),\n\n\t\t\taccuIndex = this._accuIndex ^= 1;\n\n\t\t// run active actions\n\n\t\tfor ( var i = 0; i !== nActions; ++ i ) {\n\n\t\t\tvar action = actions[ i ];\n\n\t\t\taction._update( time, deltaTime, timeDirection, accuIndex );\n\n\t\t}\n\n\t\t// update scene graph\n\n\t\tvar bindings = this._bindings,\n\t\t\tnBindings = this._nActiveBindings;\n\n\t\tfor ( var i = 0; i !== nBindings; ++ i ) {\n\n\t\t\tbindings[ i ].apply( accuIndex );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\t// Allows you to seek to a specific time in an animation.\n\tsetTime: function ( timeInSeconds ) {\n\n\t\tthis.time = 0; // Zero out time attribute for AnimationMixer object;\n\t\tfor ( var i = 0; i < this._actions.length; i ++ ) {\n\n\t\t\tthis._actions[ i ].time = 0; // Zero out time attribute for all associated AnimationAction objects.\n\n\t\t}\n\n\t\treturn this.update( timeInSeconds ); // Update used to set exact time. Returns \"this\" AnimationMixer object.\n\n\t},\n\n\t// return this mixer's root target object\n\tgetRoot: function () {\n\n\t\treturn this._root;\n\n\t},\n\n\t// free all resources specific to a particular clip\n\tuncacheClip: function ( clip ) {\n\n\t\tvar actions = this._actions,\n\t\t\tclipUuid = clip.uuid,\n\t\t\tactionsByClip = this._actionsByClip,\n\t\t\tactionsForClip = actionsByClip[ clipUuid ];\n\n\t\tif ( actionsForClip !== undefined ) {\n\n\t\t\t// note: just calling _removeInactiveAction would mess up the\n\t\t\t// iteration state and also require updating the state we can\n\t\t\t// just throw away\n\n\t\t\tvar actionsToRemove = actionsForClip.knownActions;\n\n\t\t\tfor ( var i = 0, n = actionsToRemove.length; i !== n; ++ i ) {\n\n\t\t\t\tvar action = actionsToRemove[ i ];\n\n\t\t\t\tthis._deactivateAction( action );\n\n\t\t\t\tvar cacheIndex = action._cacheIndex,\n\t\t\t\t\tlastInactiveAction = actions[ actions.length - 1 ];\n\n\t\t\t\taction._cacheIndex = null;\n\t\t\t\taction._byClipCacheIndex = null;\n\n\t\t\t\tlastInactiveAction._cacheIndex = cacheIndex;\n\t\t\t\tactions[ cacheIndex ] = lastInactiveAction;\n\t\t\t\tactions.pop();\n\n\t\t\t\tthis._removeInactiveBindingsForAction( action );\n\n\t\t\t}\n\n\t\t\tdelete actionsByClip[ clipUuid ];\n\n\t\t}\n\n\t},\n\n\t// free all resources specific to a particular root target object\n\tuncacheRoot: function ( root ) {\n\n\t\tvar rootUuid = root.uuid,\n\t\t\tactionsByClip = this._actionsByClip;\n\n\t\tfor ( var clipUuid in actionsByClip ) {\n\n\t\t\tvar actionByRoot = actionsByClip[ clipUuid ].actionByRoot,\n\t\t\t\taction = actionByRoot[ rootUuid ];\n\n\t\t\tif ( action !== undefined ) {\n\n\t\t\t\tthis._deactivateAction( action );\n\t\t\t\tthis._removeInactiveAction( action );\n\n\t\t\t}\n\n\t\t}\n\n\t\tvar bindingsByRoot = this._bindingsByRootAndName,\n\t\t\tbindingByName = bindingsByRoot[ rootUuid ];\n\n\t\tif ( bindingByName !== undefined ) {\n\n\t\t\tfor ( var trackName in bindingByName ) {\n\n\t\t\t\tvar binding = bindingByName[ trackName ];\n\t\t\t\tbinding.restoreOriginalState();\n\t\t\t\tthis._removeInactiveBinding( binding );\n\n\t\t\t}\n\n\t\t}\n\n\t},\n\n\t// remove a targeted clip from the cache\n\tuncacheAction: function ( clip, optionalRoot ) {\n\n\t\tvar action = this.existingAction( clip, optionalRoot );\n\n\t\tif ( action !== null ) {\n\n\t\t\tthis._deactivateAction( action );\n\t\t\tthis._removeInactiveAction( action );\n\n\t\t}\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction Uniform( value ) {\n\n\tif ( typeof value === 'string' ) {\n\n\t\tconsole.warn( 'THREE.Uniform: Type parameter is no longer needed.' );\n\t\tvalue = arguments[ 1 ];\n\n\t}\n\n\tthis.value = value;\n\n}\n\nUniform.prototype.clone = function () {\n\n\treturn new Uniform( this.value.clone === undefined ? this.value : this.value.clone() );\n\n};\n\n/**\n * @author benaadams / https://twitter.com/ben_a_adams\n */\n\nfunction InstancedInterleavedBuffer( array, stride, meshPerAttribute ) {\n\n\tInterleavedBuffer.call( this, array, stride );\n\n\tthis.meshPerAttribute = meshPerAttribute || 1;\n\n}\n\nInstancedInterleavedBuffer.prototype = Object.assign( Object.create( InterleavedBuffer.prototype ), {\n\n\tconstructor: InstancedInterleavedBuffer,\n\n\tisInstancedInterleavedBuffer: true,\n\n\tcopy: function ( source ) {\n\n\t\tInterleavedBuffer.prototype.copy.call( this, source );\n\n\t\tthis.meshPerAttribute = source.meshPerAttribute;\n\n\t\treturn this;\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author bhouston / http://clara.io/\n * @author stephomi / http://stephaneginier.com/\n */\n\nfunction Raycaster( origin, direction, near, far ) {\n\n\tthis.ray = new Ray( origin, direction );\n\t// direction is assumed to be normalized (for accurate distance calculations)\n\n\tthis.near = near || 0;\n\tthis.far = far || Infinity;\n\tthis.camera = null;\n\tthis.layers = new Layers();\n\n\tthis.params = {\n\t\tMesh: {},\n\t\tLine: { threshold: 1 },\n\t\tLOD: {},\n\t\tPoints: { threshold: 1 },\n\t\tSprite: {}\n\t};\n\n\tObject.defineProperties( this.params, {\n\t\tPointCloud: {\n\t\t\tget: function () {\n\n\t\t\t\tconsole.warn( 'THREE.Raycaster: params.PointCloud has been renamed to params.Points.' );\n\t\t\t\treturn this.Points;\n\n\t\t\t}\n\t\t}\n\t} );\n\n}\n\nfunction ascSort( a, b ) {\n\n\treturn a.distance - b.distance;\n\n}\n\nfunction intersectObject( object, raycaster, intersects, recursive ) {\n\n\tif ( object.layers.test( raycaster.layers ) ) {\n\n\t\tobject.raycast( raycaster, intersects );\n\n\t}\n\n\tif ( recursive === true ) {\n\n\t\tvar children = object.children;\n\n\t\tfor ( var i = 0, l = children.length; i < l; i ++ ) {\n\n\t\t\tintersectObject( children[ i ], raycaster, intersects, true );\n\n\t\t}\n\n\t}\n\n}\n\nObject.assign( Raycaster.prototype, {\n\n\tset: function ( origin, direction ) {\n\n\t\t// direction is assumed to be normalized (for accurate distance calculations)\n\n\t\tthis.ray.set( origin, direction );\n\n\t},\n\n\tsetFromCamera: function ( coords, camera ) {\n\n\t\tif ( ( camera && camera.isPerspectiveCamera ) ) {\n\n\t\t\tthis.ray.origin.setFromMatrixPosition( camera.matrixWorld );\n\t\t\tthis.ray.direction.set( coords.x, coords.y, 0.5 ).unproject( camera ).sub( this.ray.origin ).normalize();\n\t\t\tthis.camera = camera;\n\n\t\t} else if ( ( camera && camera.isOrthographicCamera ) ) {\n\n\t\t\tthis.ray.origin.set( coords.x, coords.y, ( camera.near + camera.far ) / ( camera.near - camera.far ) ).unproject( camera ); // set origin in plane of camera\n\t\t\tthis.ray.direction.set( 0, 0, - 1 ).transformDirection( camera.matrixWorld );\n\t\t\tthis.camera = camera;\n\n\t\t} else {\n\n\t\t\tconsole.error( 'THREE.Raycaster: Unsupported camera type.' );\n\n\t\t}\n\n\t},\n\n\tintersectObject: function ( object, recursive, optionalTarget ) {\n\n\t\tvar intersects = optionalTarget || [];\n\n\t\tintersectObject( object, this, intersects, recursive );\n\n\t\tintersects.sort( ascSort );\n\n\t\treturn intersects;\n\n\t},\n\n\tintersectObjects: function ( objects, recursive, optionalTarget ) {\n\n\t\tvar intersects = optionalTarget || [];\n\n\t\tif ( Array.isArray( objects ) === false ) {\n\n\t\t\tconsole.warn( 'THREE.Raycaster.intersectObjects: objects is not an Array.' );\n\t\t\treturn intersects;\n\n\t\t}\n\n\t\tfor ( var i = 0, l = objects.length; i < l; i ++ ) {\n\n\t\t\tintersectObject( objects[ i ], this, intersects, recursive );\n\n\t\t}\n\n\t\tintersects.sort( ascSort );\n\n\t\treturn intersects;\n\n\t}\n\n} );\n\n/**\n * @author bhouston / http://clara.io\n * @author WestLangley / http://github.com/WestLangley\n *\n * Ref: https://en.wikipedia.org/wiki/Spherical_coordinate_system\n *\n * The polar angle (phi) is measured from the positive y-axis. The positive y-axis is up.\n * The azimuthal angle (theta) is measured from the positive z-axis.\n */\n\nfunction Spherical( radius, phi, theta ) {\n\n\tthis.radius = ( radius !== undefined ) ? radius : 1.0;\n\tthis.phi = ( phi !== undefined ) ? phi : 0; // polar angle\n\tthis.theta = ( theta !== undefined ) ? theta : 0; // azimuthal angle\n\n\treturn this;\n\n}\n\nObject.assign( Spherical.prototype, {\n\n\tset: function ( radius, phi, theta ) {\n\n\t\tthis.radius = radius;\n\t\tthis.phi = phi;\n\t\tthis.theta = theta;\n\n\t\treturn this;\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor().copy( this );\n\n\t},\n\n\tcopy: function ( other ) {\n\n\t\tthis.radius = other.radius;\n\t\tthis.phi = other.phi;\n\t\tthis.theta = other.theta;\n\n\t\treturn this;\n\n\t},\n\n\t// restrict phi to be betwee EPS and PI-EPS\n\tmakeSafe: function () {\n\n\t\tvar EPS = 0.000001;\n\t\tthis.phi = Math.max( EPS, Math.min( Math.PI - EPS, this.phi ) );\n\n\t\treturn this;\n\n\t},\n\n\tsetFromVector3: function ( v ) {\n\n\t\treturn this.setFromCartesianCoords( v.x, v.y, v.z );\n\n\t},\n\n\tsetFromCartesianCoords: function ( x, y, z ) {\n\n\t\tthis.radius = Math.sqrt( x * x + y * y + z * z );\n\n\t\tif ( this.radius === 0 ) {\n\n\t\t\tthis.theta = 0;\n\t\t\tthis.phi = 0;\n\n\t\t} else {\n\n\t\t\tthis.theta = Math.atan2( x, z );\n\t\t\tthis.phi = Math.acos( MathUtils.clamp( y / this.radius, - 1, 1 ) );\n\n\t\t}\n\n\t\treturn this;\n\n\t}\n\n} );\n\n/**\n * @author Mugen87 / https://github.com/Mugen87\n *\n * Ref: https://en.wikipedia.org/wiki/Cylindrical_coordinate_system\n *\n */\n\nfunction Cylindrical( radius, theta, y ) {\n\n\tthis.radius = ( radius !== undefined ) ? radius : 1.0; // distance from the origin to a point in the x-z plane\n\tthis.theta = ( theta !== undefined ) ? theta : 0; // counterclockwise angle in the x-z plane measured in radians from the positive z-axis\n\tthis.y = ( y !== undefined ) ? y : 0; // height above the x-z plane\n\n\treturn this;\n\n}\n\nObject.assign( Cylindrical.prototype, {\n\n\tset: function ( radius, theta, y ) {\n\n\t\tthis.radius = radius;\n\t\tthis.theta = theta;\n\t\tthis.y = y;\n\n\t\treturn this;\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor().copy( this );\n\n\t},\n\n\tcopy: function ( other ) {\n\n\t\tthis.radius = other.radius;\n\t\tthis.theta = other.theta;\n\t\tthis.y = other.y;\n\n\t\treturn this;\n\n\t},\n\n\tsetFromVector3: function ( v ) {\n\n\t\treturn this.setFromCartesianCoords( v.x, v.y, v.z );\n\n\t},\n\n\tsetFromCartesianCoords: function ( x, y, z ) {\n\n\t\tthis.radius = Math.sqrt( x * x + z * z );\n\t\tthis.theta = Math.atan2( x, z );\n\t\tthis.y = y;\n\n\t\treturn this;\n\n\t}\n\n} );\n\n/**\n * @author bhouston / http://clara.io\n */\n\nvar _vector$7 = new Vector2();\n\nfunction Box2( min, max ) {\n\n\tthis.min = ( min !== undefined ) ? min : new Vector2( + Infinity, + Infinity );\n\tthis.max = ( max !== undefined ) ? max : new Vector2( - Infinity, - Infinity );\n\n}\n\nObject.assign( Box2.prototype, {\n\n\tset: function ( min, max ) {\n\n\t\tthis.min.copy( min );\n\t\tthis.max.copy( max );\n\n\t\treturn this;\n\n\t},\n\n\tsetFromPoints: function ( points ) {\n\n\t\tthis.makeEmpty();\n\n\t\tfor ( var i = 0, il = points.length; i < il; i ++ ) {\n\n\t\t\tthis.expandByPoint( points[ i ] );\n\n\t\t}\n\n\t\treturn this;\n\n\t},\n\n\tsetFromCenterAndSize: function ( center, size ) {\n\n\t\tvar halfSize = _vector$7.copy( size ).multiplyScalar( 0.5 );\n\t\tthis.min.copy( center ).sub( halfSize );\n\t\tthis.max.copy( center ).add( halfSize );\n\n\t\treturn this;\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor().copy( this );\n\n\t},\n\n\tcopy: function ( box ) {\n\n\t\tthis.min.copy( box.min );\n\t\tthis.max.copy( box.max );\n\n\t\treturn this;\n\n\t},\n\n\tmakeEmpty: function () {\n\n\t\tthis.min.x = this.min.y = + Infinity;\n\t\tthis.max.x = this.max.y = - Infinity;\n\n\t\treturn this;\n\n\t},\n\n\tisEmpty: function () {\n\n\t\t// this is a more robust check for empty than ( volume <= 0 ) because volume can get positive with two negative axes\n\n\t\treturn ( this.max.x < this.min.x ) || ( this.max.y < this.min.y );\n\n\t},\n\n\tgetCenter: function ( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Box2: .getCenter() target is now required' );\n\t\t\ttarget = new Vector2();\n\n\t\t}\n\n\t\treturn this.isEmpty() ? target.set( 0, 0 ) : target.addVectors( this.min, this.max ).multiplyScalar( 0.5 );\n\n\t},\n\n\tgetSize: function ( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Box2: .getSize() target is now required' );\n\t\t\ttarget = new Vector2();\n\n\t\t}\n\n\t\treturn this.isEmpty() ? target.set( 0, 0 ) : target.subVectors( this.max, this.min );\n\n\t},\n\n\texpandByPoint: function ( point ) {\n\n\t\tthis.min.min( point );\n\t\tthis.max.max( point );\n\n\t\treturn this;\n\n\t},\n\n\texpandByVector: function ( vector ) {\n\n\t\tthis.min.sub( vector );\n\t\tthis.max.add( vector );\n\n\t\treturn this;\n\n\t},\n\n\texpandByScalar: function ( scalar ) {\n\n\t\tthis.min.addScalar( - scalar );\n\t\tthis.max.addScalar( scalar );\n\n\t\treturn this;\n\n\t},\n\n\tcontainsPoint: function ( point ) {\n\n\t\treturn point.x < this.min.x || point.x > this.max.x ||\n\t\t\tpoint.y < this.min.y || point.y > this.max.y ? false : true;\n\n\t},\n\n\tcontainsBox: function ( box ) {\n\n\t\treturn this.min.x <= box.min.x && box.max.x <= this.max.x &&\n\t\t\tthis.min.y <= box.min.y && box.max.y <= this.max.y;\n\n\t},\n\n\tgetParameter: function ( point, target ) {\n\n\t\t// This can potentially have a divide by zero if the box\n\t\t// has a size dimension of 0.\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Box2: .getParameter() target is now required' );\n\t\t\ttarget = new Vector2();\n\n\t\t}\n\n\t\treturn target.set(\n\t\t\t( point.x - this.min.x ) / ( this.max.x - this.min.x ),\n\t\t\t( point.y - this.min.y ) / ( this.max.y - this.min.y )\n\t\t);\n\n\t},\n\n\tintersectsBox: function ( box ) {\n\n\t\t// using 4 splitting planes to rule out intersections\n\n\t\treturn box.max.x < this.min.x || box.min.x > this.max.x ||\n\t\t\tbox.max.y < this.min.y || box.min.y > this.max.y ? false : true;\n\n\t},\n\n\tclampPoint: function ( point, target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Box2: .clampPoint() target is now required' );\n\t\t\ttarget = new Vector2();\n\n\t\t}\n\n\t\treturn target.copy( point ).clamp( this.min, this.max );\n\n\t},\n\n\tdistanceToPoint: function ( point ) {\n\n\t\tvar clampedPoint = _vector$7.copy( point ).clamp( this.min, this.max );\n\t\treturn clampedPoint.sub( point ).length();\n\n\t},\n\n\tintersect: function ( box ) {\n\n\t\tthis.min.max( box.min );\n\t\tthis.max.min( box.max );\n\n\t\treturn this;\n\n\t},\n\n\tunion: function ( box ) {\n\n\t\tthis.min.min( box.min );\n\t\tthis.max.max( box.max );\n\n\t\treturn this;\n\n\t},\n\n\ttranslate: function ( offset ) {\n\n\t\tthis.min.add( offset );\n\t\tthis.max.add( offset );\n\n\t\treturn this;\n\n\t},\n\n\tequals: function ( box ) {\n\n\t\treturn box.min.equals( this.min ) && box.max.equals( this.max );\n\n\t}\n\n} );\n\n/**\n * @author bhouston / http://clara.io\n */\n\nvar _startP = new Vector3();\nvar _startEnd = new Vector3();\n\nfunction Line3( start, end ) {\n\n\tthis.start = ( start !== undefined ) ? start : new Vector3();\n\tthis.end = ( end !== undefined ) ? end : new Vector3();\n\n}\n\nObject.assign( Line3.prototype, {\n\n\tset: function ( start, end ) {\n\n\t\tthis.start.copy( start );\n\t\tthis.end.copy( end );\n\n\t\treturn this;\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor().copy( this );\n\n\t},\n\n\tcopy: function ( line ) {\n\n\t\tthis.start.copy( line.start );\n\t\tthis.end.copy( line.end );\n\n\t\treturn this;\n\n\t},\n\n\tgetCenter: function ( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Line3: .getCenter() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\treturn target.addVectors( this.start, this.end ).multiplyScalar( 0.5 );\n\n\t},\n\n\tdelta: function ( target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Line3: .delta() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\treturn target.subVectors( this.end, this.start );\n\n\t},\n\n\tdistanceSq: function () {\n\n\t\treturn this.start.distanceToSquared( this.end );\n\n\t},\n\n\tdistance: function () {\n\n\t\treturn this.start.distanceTo( this.end );\n\n\t},\n\n\tat: function ( t, target ) {\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Line3: .at() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\treturn this.delta( target ).multiplyScalar( t ).add( this.start );\n\n\t},\n\n\tclosestPointToPointParameter: function ( point, clampToLine ) {\n\n\t\t_startP.subVectors( point, this.start );\n\t\t_startEnd.subVectors( this.end, this.start );\n\n\t\tvar startEnd2 = _startEnd.dot( _startEnd );\n\t\tvar startEnd_startP = _startEnd.dot( _startP );\n\n\t\tvar t = startEnd_startP / startEnd2;\n\n\t\tif ( clampToLine ) {\n\n\t\t\tt = MathUtils.clamp( t, 0, 1 );\n\n\t\t}\n\n\t\treturn t;\n\n\t},\n\n\tclosestPointToPoint: function ( point, clampToLine, target ) {\n\n\t\tvar t = this.closestPointToPointParameter( point, clampToLine );\n\n\t\tif ( target === undefined ) {\n\n\t\t\tconsole.warn( 'THREE.Line3: .closestPointToPoint() target is now required' );\n\t\t\ttarget = new Vector3();\n\n\t\t}\n\n\t\treturn this.delta( target ).multiplyScalar( t ).add( this.start );\n\n\t},\n\n\tapplyMatrix4: function ( matrix ) {\n\n\t\tthis.start.applyMatrix4( matrix );\n\t\tthis.end.applyMatrix4( matrix );\n\n\t\treturn this;\n\n\t},\n\n\tequals: function ( line ) {\n\n\t\treturn line.start.equals( this.start ) && line.end.equals( this.end );\n\n\t}\n\n} );\n\n/**\n * @author alteredq / http://alteredqualia.com/\n */\n\nfunction ImmediateRenderObject( material ) {\n\n\tObject3D.call( this );\n\n\tthis.material = material;\n\tthis.render = function ( /* renderCallback */ ) {};\n\n}\n\nImmediateRenderObject.prototype = Object.create( Object3D.prototype );\nImmediateRenderObject.prototype.constructor = ImmediateRenderObject;\n\nImmediateRenderObject.prototype.isImmediateRenderObject = true;\n\n/**\n * @author alteredq / http://alteredqualia.com/\n * @author mrdoob / http://mrdoob.com/\n * @author WestLangley / http://github.com/WestLangley\n */\n\nvar _vector$8 = new Vector3();\n\nfunction SpotLightHelper( light, color ) {\n\n\tObject3D.call( this );\n\n\tthis.light = light;\n\tthis.light.updateMatrixWorld();\n\n\tthis.matrix = light.matrixWorld;\n\tthis.matrixAutoUpdate = false;\n\n\tthis.color = color;\n\n\tvar geometry = new BufferGeometry();\n\n\tvar positions = [\n\t\t0, 0, 0, \t0, 0, 1,\n\t\t0, 0, 0, \t1, 0, 1,\n\t\t0, 0, 0,\t- 1, 0, 1,\n\t\t0, 0, 0, \t0, 1, 1,\n\t\t0, 0, 0, \t0, - 1, 1\n\t];\n\n\tfor ( var i = 0, j = 1, l = 32; i < l; i ++, j ++ ) {\n\n\t\tvar p1 = ( i / l ) * Math.PI * 2;\n\t\tvar p2 = ( j / l ) * Math.PI * 2;\n\n\t\tpositions.push(\n\t\t\tMath.cos( p1 ), Math.sin( p1 ), 1,\n\t\t\tMath.cos( p2 ), Math.sin( p2 ), 1\n\t\t);\n\n\t}\n\n\tgeometry.setAttribute( 'position', new Float32BufferAttribute( positions, 3 ) );\n\n\tvar material = new LineBasicMaterial( { fog: false } );\n\n\tthis.cone = new LineSegments( geometry, material );\n\tthis.add( this.cone );\n\n\tthis.update();\n\n}\n\nSpotLightHelper.prototype = Object.create( Object3D.prototype );\nSpotLightHelper.prototype.constructor = SpotLightHelper;\n\nSpotLightHelper.prototype.dispose = function () {\n\n\tthis.cone.geometry.dispose();\n\tthis.cone.material.dispose();\n\n};\n\nSpotLightHelper.prototype.update = function () {\n\n\tthis.light.updateMatrixWorld();\n\n\tvar coneLength = this.light.distance ? this.light.distance : 1000;\n\tvar coneWidth = coneLength * Math.tan( this.light.angle );\n\n\tthis.cone.scale.set( coneWidth, coneWidth, coneLength );\n\n\t_vector$8.setFromMatrixPosition( this.light.target.matrixWorld );\n\n\tthis.cone.lookAt( _vector$8 );\n\n\tif ( this.color !== undefined ) {\n\n\t\tthis.cone.material.color.set( this.color );\n\n\t} else {\n\n\t\tthis.cone.material.color.copy( this.light.color );\n\n\t}\n\n};\n\n/**\n * @author Sean Griffin / http://twitter.com/sgrif\n * @author Michael Guerrero / http://realitymeltdown.com\n * @author mrdoob / http://mrdoob.com/\n * @author ikerr / http://verold.com\n * @author Mugen87 / https://github.com/Mugen87\n */\n\nvar _vector$9 = new Vector3();\nvar _boneMatrix = new Matrix4();\nvar _matrixWorldInv = new Matrix4();\n\nfunction getBoneList( object ) {\n\n\tvar boneList = [];\n\n\tif ( object && object.isBone ) {\n\n\t\tboneList.push( object );\n\n\t}\n\n\tfor ( var i = 0; i < object.children.length; i ++ ) {\n\n\t\tboneList.push.apply( boneList, getBoneList( object.children[ i ] ) );\n\n\t}\n\n\treturn boneList;\n\n}\n\nfunction SkeletonHelper( object ) {\n\n\tvar bones = getBoneList( object );\n\n\tvar geometry = new BufferGeometry();\n\n\tvar vertices = [];\n\tvar colors = [];\n\n\tvar color1 = new Color( 0, 0, 1 );\n\tvar color2 = new Color( 0, 1, 0 );\n\n\tfor ( var i = 0; i < bones.length; i ++ ) {\n\n\t\tvar bone = bones[ i ];\n\n\t\tif ( bone.parent && bone.parent.isBone ) {\n\n\t\t\tvertices.push( 0, 0, 0 );\n\t\t\tvertices.push( 0, 0, 0 );\n\t\t\tcolors.push( color1.r, color1.g, color1.b );\n\t\t\tcolors.push( color2.r, color2.g, color2.b );\n\n\t\t}\n\n\t}\n\n\tgeometry.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\tgeometry.setAttribute( 'color', new Float32BufferAttribute( colors, 3 ) );\n\n\tvar material = new LineBasicMaterial( { vertexColors: true, depthTest: false, depthWrite: false, transparent: true } );\n\n\tLineSegments.call( this, geometry, material );\n\n\tthis.root = object;\n\tthis.bones = bones;\n\n\tthis.matrix = object.matrixWorld;\n\tthis.matrixAutoUpdate = false;\n\n}\n\nSkeletonHelper.prototype = Object.create( LineSegments.prototype );\nSkeletonHelper.prototype.constructor = SkeletonHelper;\n\nSkeletonHelper.prototype.isSkeletonHelper = true;\n\nSkeletonHelper.prototype.updateMatrixWorld = function ( force ) {\n\n\tvar bones = this.bones;\n\n\tvar geometry = this.geometry;\n\tvar position = geometry.getAttribute( 'position' );\n\n\t_matrixWorldInv.getInverse( this.root.matrixWorld );\n\n\tfor ( var i = 0, j = 0; i < bones.length; i ++ ) {\n\n\t\tvar bone = bones[ i ];\n\n\t\tif ( bone.parent && bone.parent.isBone ) {\n\n\t\t\t_boneMatrix.multiplyMatrices( _matrixWorldInv, bone.matrixWorld );\n\t\t\t_vector$9.setFromMatrixPosition( _boneMatrix );\n\t\t\tposition.setXYZ( j, _vector$9.x, _vector$9.y, _vector$9.z );\n\n\t\t\t_boneMatrix.multiplyMatrices( _matrixWorldInv, bone.parent.matrixWorld );\n\t\t\t_vector$9.setFromMatrixPosition( _boneMatrix );\n\t\t\tposition.setXYZ( j + 1, _vector$9.x, _vector$9.y, _vector$9.z );\n\n\t\t\tj += 2;\n\n\t\t}\n\n\t}\n\n\tgeometry.getAttribute( 'position' ).needsUpdate = true;\n\n\tObject3D.prototype.updateMatrixWorld.call( this, force );\n\n};\n\n/**\n * @author alteredq / http://alteredqualia.com/\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction PointLightHelper( light, sphereSize, color ) {\n\n\tthis.light = light;\n\tthis.light.updateMatrixWorld();\n\n\tthis.color = color;\n\n\tvar geometry = new SphereBufferGeometry( sphereSize, 4, 2 );\n\tvar material = new MeshBasicMaterial( { wireframe: true, fog: false } );\n\n\tMesh.call( this, geometry, material );\n\n\tthis.matrix = this.light.matrixWorld;\n\tthis.matrixAutoUpdate = false;\n\n\tthis.update();\n\n\n\t/*\n\tvar distanceGeometry = new THREE.IcosahedronBufferGeometry( 1, 2 );\n\tvar distanceMaterial = new THREE.MeshBasicMaterial( { color: hexColor, fog: false, wireframe: true, opacity: 0.1, transparent: true } );\n\n\tthis.lightSphere = new THREE.Mesh( bulbGeometry, bulbMaterial );\n\tthis.lightDistance = new THREE.Mesh( distanceGeometry, distanceMaterial );\n\n\tvar d = light.distance;\n\n\tif ( d === 0.0 ) {\n\n\t\tthis.lightDistance.visible = false;\n\n\t} else {\n\n\t\tthis.lightDistance.scale.set( d, d, d );\n\n\t}\n\n\tthis.add( this.lightDistance );\n\t*/\n\n}\n\nPointLightHelper.prototype = Object.create( Mesh.prototype );\nPointLightHelper.prototype.constructor = PointLightHelper;\n\nPointLightHelper.prototype.dispose = function () {\n\n\tthis.geometry.dispose();\n\tthis.material.dispose();\n\n};\n\nPointLightHelper.prototype.update = function () {\n\n\tif ( this.color !== undefined ) {\n\n\t\tthis.material.color.set( this.color );\n\n\t} else {\n\n\t\tthis.material.color.copy( this.light.color );\n\n\t}\n\n\t/*\n\tvar d = this.light.distance;\n\n\tif ( d === 0.0 ) {\n\n\t\tthis.lightDistance.visible = false;\n\n\t} else {\n\n\t\tthis.lightDistance.visible = true;\n\t\tthis.lightDistance.scale.set( d, d, d );\n\n\t}\n\t*/\n\n};\n\n/**\n * @author alteredq / http://alteredqualia.com/\n * @author mrdoob / http://mrdoob.com/\n * @author Mugen87 / https://github.com/Mugen87\n */\n\nvar _vector$a = new Vector3();\nvar _color1 = new Color();\nvar _color2 = new Color();\n\nfunction HemisphereLightHelper( light, size, color ) {\n\n\tObject3D.call( this );\n\n\tthis.light = light;\n\tthis.light.updateMatrixWorld();\n\n\tthis.matrix = light.matrixWorld;\n\tthis.matrixAutoUpdate = false;\n\n\tthis.color = color;\n\n\tvar geometry = new OctahedronBufferGeometry( size );\n\tgeometry.rotateY( Math.PI * 0.5 );\n\n\tthis.material = new MeshBasicMaterial( { wireframe: true, fog: false } );\n\tif ( this.color === undefined ) this.material.vertexColors = true;\n\n\tvar position = geometry.getAttribute( 'position' );\n\tvar colors = new Float32Array( position.count * 3 );\n\n\tgeometry.setAttribute( 'color', new BufferAttribute( colors, 3 ) );\n\n\tthis.add( new Mesh( geometry, this.material ) );\n\n\tthis.update();\n\n}\n\nHemisphereLightHelper.prototype = Object.create( Object3D.prototype );\nHemisphereLightHelper.prototype.constructor = HemisphereLightHelper;\n\nHemisphereLightHelper.prototype.dispose = function () {\n\n\tthis.children[ 0 ].geometry.dispose();\n\tthis.children[ 0 ].material.dispose();\n\n};\n\nHemisphereLightHelper.prototype.update = function () {\n\n\tvar mesh = this.children[ 0 ];\n\n\tif ( this.color !== undefined ) {\n\n\t\tthis.material.color.set( this.color );\n\n\t} else {\n\n\t\tvar colors = mesh.geometry.getAttribute( 'color' );\n\n\t\t_color1.copy( this.light.color );\n\t\t_color2.copy( this.light.groundColor );\n\n\t\tfor ( var i = 0, l = colors.count; i < l; i ++ ) {\n\n\t\t\tvar color = ( i < ( l / 2 ) ) ? _color1 : _color2;\n\n\t\t\tcolors.setXYZ( i, color.r, color.g, color.b );\n\n\t\t}\n\n\t\tcolors.needsUpdate = true;\n\n\t}\n\n\tmesh.lookAt( _vector$a.setFromMatrixPosition( this.light.matrixWorld ).negate() );\n\n};\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction GridHelper( size, divisions, color1, color2 ) {\n\n\tsize = size || 10;\n\tdivisions = divisions || 10;\n\tcolor1 = new Color( color1 !== undefined ? color1 : 0x444444 );\n\tcolor2 = new Color( color2 !== undefined ? color2 : 0x888888 );\n\n\tvar center = divisions / 2;\n\tvar step = size / divisions;\n\tvar halfSize = size / 2;\n\n\tvar vertices = [], colors = [];\n\n\tfor ( var i = 0, j = 0, k = - halfSize; i <= divisions; i ++, k += step ) {\n\n\t\tvertices.push( - halfSize, 0, k, halfSize, 0, k );\n\t\tvertices.push( k, 0, - halfSize, k, 0, halfSize );\n\n\t\tvar color = i === center ? color1 : color2;\n\n\t\tcolor.toArray( colors, j ); j += 3;\n\t\tcolor.toArray( colors, j ); j += 3;\n\t\tcolor.toArray( colors, j ); j += 3;\n\t\tcolor.toArray( colors, j ); j += 3;\n\n\t}\n\n\tvar geometry = new BufferGeometry();\n\tgeometry.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\tgeometry.setAttribute( 'color', new Float32BufferAttribute( colors, 3 ) );\n\n\tvar material = new LineBasicMaterial( { vertexColors: true } );\n\n\tLineSegments.call( this, geometry, material );\n\n}\n\nGridHelper.prototype = Object.assign( Object.create( LineSegments.prototype ), {\n\n\tconstructor: GridHelper,\n\n\tcopy: function ( source ) {\n\n\t\tLineSegments.prototype.copy.call( this, source );\n\n\t\tthis.geometry.copy( source.geometry );\n\t\tthis.material.copy( source.material );\n\n\t\treturn this;\n\n\t},\n\n\tclone: function () {\n\n\t\treturn new this.constructor().copy( this );\n\n\t}\n\n} );\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author Mugen87 / http://github.com/Mugen87\n * @author Hectate / http://www.github.com/Hectate\n */\n\nfunction PolarGridHelper( radius, radials, circles, divisions, color1, color2 ) {\n\n\tradius = radius || 10;\n\tradials = radials || 16;\n\tcircles = circles || 8;\n\tdivisions = divisions || 64;\n\tcolor1 = new Color( color1 !== undefined ? color1 : 0x444444 );\n\tcolor2 = new Color( color2 !== undefined ? color2 : 0x888888 );\n\n\tvar vertices = [];\n\tvar colors = [];\n\n\tvar x, z;\n\tvar v, i, j, r, color;\n\n\t// create the radials\n\n\tfor ( i = 0; i <= radials; i ++ ) {\n\n\t\tv = ( i / radials ) * ( Math.PI * 2 );\n\n\t\tx = Math.sin( v ) * radius;\n\t\tz = Math.cos( v ) * radius;\n\n\t\tvertices.push( 0, 0, 0 );\n\t\tvertices.push( x, 0, z );\n\n\t\tcolor = ( i & 1 ) ? color1 : color2;\n\n\t\tcolors.push( color.r, color.g, color.b );\n\t\tcolors.push( color.r, color.g, color.b );\n\n\t}\n\n\t// create the circles\n\n\tfor ( i = 0; i <= circles; i ++ ) {\n\n\t\tcolor = ( i & 1 ) ? color1 : color2;\n\n\t\tr = radius - ( radius / circles * i );\n\n\t\tfor ( j = 0; j < divisions; j ++ ) {\n\n\t\t\t// first vertex\n\n\t\t\tv = ( j / divisions ) * ( Math.PI * 2 );\n\n\t\t\tx = Math.sin( v ) * r;\n\t\t\tz = Math.cos( v ) * r;\n\n\t\t\tvertices.push( x, 0, z );\n\t\t\tcolors.push( color.r, color.g, color.b );\n\n\t\t\t// second vertex\n\n\t\t\tv = ( ( j + 1 ) / divisions ) * ( Math.PI * 2 );\n\n\t\t\tx = Math.sin( v ) * r;\n\t\t\tz = Math.cos( v ) * r;\n\n\t\t\tvertices.push( x, 0, z );\n\t\t\tcolors.push( color.r, color.g, color.b );\n\n\t\t}\n\n\t}\n\n\tvar geometry = new BufferGeometry();\n\tgeometry.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\tgeometry.setAttribute( 'color', new Float32BufferAttribute( colors, 3 ) );\n\n\tvar material = new LineBasicMaterial( { vertexColors: true } );\n\n\tLineSegments.call( this, geometry, material );\n\n}\n\nPolarGridHelper.prototype = Object.create( LineSegments.prototype );\nPolarGridHelper.prototype.constructor = PolarGridHelper;\n\n/**\n * @author alteredq / http://alteredqualia.com/\n * @author mrdoob / http://mrdoob.com/\n * @author WestLangley / http://github.com/WestLangley\n */\n\nvar _v1$5 = new Vector3();\nvar _v2$3 = new Vector3();\nvar _v3$1 = new Vector3();\n\nfunction DirectionalLightHelper( light, size, color ) {\n\n\tObject3D.call( this );\n\n\tthis.light = light;\n\tthis.light.updateMatrixWorld();\n\n\tthis.matrix = light.matrixWorld;\n\tthis.matrixAutoUpdate = false;\n\n\tthis.color = color;\n\n\tif ( size === undefined ) size = 1;\n\n\tvar geometry = new BufferGeometry();\n\tgeometry.setAttribute( 'position', new Float32BufferAttribute( [\n\t\t- size, size, 0,\n\t\tsize, size, 0,\n\t\tsize, - size, 0,\n\t\t- size, - size, 0,\n\t\t- size, size, 0\n\t], 3 ) );\n\n\tvar material = new LineBasicMaterial( { fog: false } );\n\n\tthis.lightPlane = new Line( geometry, material );\n\tthis.add( this.lightPlane );\n\n\tgeometry = new BufferGeometry();\n\tgeometry.setAttribute( 'position', new Float32BufferAttribute( [ 0, 0, 0, 0, 0, 1 ], 3 ) );\n\n\tthis.targetLine = new Line( geometry, material );\n\tthis.add( this.targetLine );\n\n\tthis.update();\n\n}\n\nDirectionalLightHelper.prototype = Object.create( Object3D.prototype );\nDirectionalLightHelper.prototype.constructor = DirectionalLightHelper;\n\nDirectionalLightHelper.prototype.dispose = function () {\n\n\tthis.lightPlane.geometry.dispose();\n\tthis.lightPlane.material.dispose();\n\tthis.targetLine.geometry.dispose();\n\tthis.targetLine.material.dispose();\n\n};\n\nDirectionalLightHelper.prototype.update = function () {\n\n\t_v1$5.setFromMatrixPosition( this.light.matrixWorld );\n\t_v2$3.setFromMatrixPosition( this.light.target.matrixWorld );\n\t_v3$1.subVectors( _v2$3, _v1$5 );\n\n\tthis.lightPlane.lookAt( _v2$3 );\n\n\tif ( this.color !== undefined ) {\n\n\t\tthis.lightPlane.material.color.set( this.color );\n\t\tthis.targetLine.material.color.set( this.color );\n\n\t} else {\n\n\t\tthis.lightPlane.material.color.copy( this.light.color );\n\t\tthis.targetLine.material.color.copy( this.light.color );\n\n\t}\n\n\tthis.targetLine.lookAt( _v2$3 );\n\tthis.targetLine.scale.z = _v3$1.length();\n\n};\n\n/**\n * @author alteredq / http://alteredqualia.com/\n * @author Mugen87 / https://github.com/Mugen87\n *\n *\t- shows frustum, line of sight and up of the camera\n *\t- suitable for fast updates\n * \t- based on frustum visualization in lightgl.js shadowmap example\n *\t\thttp://evanw.github.com/lightgl.js/tests/shadowmap.html\n */\n\nvar _vector$b = new Vector3();\nvar _camera = new Camera();\n\nfunction CameraHelper( camera ) {\n\n\tvar geometry = new BufferGeometry();\n\tvar material = new LineBasicMaterial( { color: 0xffffff, vertexColors: true } );\n\n\tvar vertices = [];\n\tvar colors = [];\n\n\tvar pointMap = {};\n\n\t// colors\n\n\tvar colorFrustum = new Color( 0xffaa00 );\n\tvar colorCone = new Color( 0xff0000 );\n\tvar colorUp = new Color( 0x00aaff );\n\tvar colorTarget = new Color( 0xffffff );\n\tvar colorCross = new Color( 0x333333 );\n\n\t// near\n\n\taddLine( 'n1', 'n2', colorFrustum );\n\taddLine( 'n2', 'n4', colorFrustum );\n\taddLine( 'n4', 'n3', colorFrustum );\n\taddLine( 'n3', 'n1', colorFrustum );\n\n\t// far\n\n\taddLine( 'f1', 'f2', colorFrustum );\n\taddLine( 'f2', 'f4', colorFrustum );\n\taddLine( 'f4', 'f3', colorFrustum );\n\taddLine( 'f3', 'f1', colorFrustum );\n\n\t// sides\n\n\taddLine( 'n1', 'f1', colorFrustum );\n\taddLine( 'n2', 'f2', colorFrustum );\n\taddLine( 'n3', 'f3', colorFrustum );\n\taddLine( 'n4', 'f4', colorFrustum );\n\n\t// cone\n\n\taddLine( 'p', 'n1', colorCone );\n\taddLine( 'p', 'n2', colorCone );\n\taddLine( 'p', 'n3', colorCone );\n\taddLine( 'p', 'n4', colorCone );\n\n\t// up\n\n\taddLine( 'u1', 'u2', colorUp );\n\taddLine( 'u2', 'u3', colorUp );\n\taddLine( 'u3', 'u1', colorUp );\n\n\t// target\n\n\taddLine( 'c', 't', colorTarget );\n\taddLine( 'p', 'c', colorCross );\n\n\t// cross\n\n\taddLine( 'cn1', 'cn2', colorCross );\n\taddLine( 'cn3', 'cn4', colorCross );\n\n\taddLine( 'cf1', 'cf2', colorCross );\n\taddLine( 'cf3', 'cf4', colorCross );\n\n\tfunction addLine( a, b, color ) {\n\n\t\taddPoint( a, color );\n\t\taddPoint( b, color );\n\n\t}\n\n\tfunction addPoint( id, color ) {\n\n\t\tvertices.push( 0, 0, 0 );\n\t\tcolors.push( color.r, color.g, color.b );\n\n\t\tif ( pointMap[ id ] === undefined ) {\n\n\t\t\tpointMap[ id ] = [];\n\n\t\t}\n\n\t\tpointMap[ id ].push( ( vertices.length / 3 ) - 1 );\n\n\t}\n\n\tgeometry.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\tgeometry.setAttribute( 'color', new Float32BufferAttribute( colors, 3 ) );\n\n\tLineSegments.call( this, geometry, material );\n\n\tthis.camera = camera;\n\tif ( this.camera.updateProjectionMatrix ) this.camera.updateProjectionMatrix();\n\n\tthis.matrix = camera.matrixWorld;\n\tthis.matrixAutoUpdate = false;\n\n\tthis.pointMap = pointMap;\n\n\tthis.update();\n\n}\n\nCameraHelper.prototype = Object.create( LineSegments.prototype );\nCameraHelper.prototype.constructor = CameraHelper;\n\nCameraHelper.prototype.update = function () {\n\n\tvar geometry = this.geometry;\n\tvar pointMap = this.pointMap;\n\n\tvar w = 1, h = 1;\n\n\t// we need just camera projection matrix inverse\n\t// world matrix must be identity\n\n\t_camera.projectionMatrixInverse.copy( this.camera.projectionMatrixInverse );\n\n\t// center / target\n\n\tsetPoint( 'c', pointMap, geometry, _camera, 0, 0, - 1 );\n\tsetPoint( 't', pointMap, geometry, _camera, 0, 0, 1 );\n\n\t// near\n\n\tsetPoint( 'n1', pointMap, geometry, _camera, - w, - h, - 1 );\n\tsetPoint( 'n2', pointMap, geometry, _camera, w, - h, - 1 );\n\tsetPoint( 'n3', pointMap, geometry, _camera, - w, h, - 1 );\n\tsetPoint( 'n4', pointMap, geometry, _camera, w, h, - 1 );\n\n\t// far\n\n\tsetPoint( 'f1', pointMap, geometry, _camera, - w, - h, 1 );\n\tsetPoint( 'f2', pointMap, geometry, _camera, w, - h, 1 );\n\tsetPoint( 'f3', pointMap, geometry, _camera, - w, h, 1 );\n\tsetPoint( 'f4', pointMap, geometry, _camera, w, h, 1 );\n\n\t// up\n\n\tsetPoint( 'u1', pointMap, geometry, _camera, w * 0.7, h * 1.1, - 1 );\n\tsetPoint( 'u2', pointMap, geometry, _camera, - w * 0.7, h * 1.1, - 1 );\n\tsetPoint( 'u3', pointMap, geometry, _camera, 0, h * 2, - 1 );\n\n\t// cross\n\n\tsetPoint( 'cf1', pointMap, geometry, _camera, - w, 0, 1 );\n\tsetPoint( 'cf2', pointMap, geometry, _camera, w, 0, 1 );\n\tsetPoint( 'cf3', pointMap, geometry, _camera, 0, - h, 1 );\n\tsetPoint( 'cf4', pointMap, geometry, _camera, 0, h, 1 );\n\n\tsetPoint( 'cn1', pointMap, geometry, _camera, - w, 0, - 1 );\n\tsetPoint( 'cn2', pointMap, geometry, _camera, w, 0, - 1 );\n\tsetPoint( 'cn3', pointMap, geometry, _camera, 0, - h, - 1 );\n\tsetPoint( 'cn4', pointMap, geometry, _camera, 0, h, - 1 );\n\n\tgeometry.getAttribute( 'position' ).needsUpdate = true;\n\n};\n\nfunction setPoint( point, pointMap, geometry, camera, x, y, z ) {\n\n\t_vector$b.set( x, y, z ).unproject( camera );\n\n\tvar points = pointMap[ point ];\n\n\tif ( points !== undefined ) {\n\n\t\tvar position = geometry.getAttribute( 'position' );\n\n\t\tfor ( var i = 0, l = points.length; i < l; i ++ ) {\n\n\t\t\tposition.setXYZ( points[ i ], _vector$b.x, _vector$b.y, _vector$b.z );\n\n\t\t}\n\n\t}\n\n}\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author Mugen87 / http://github.com/Mugen87\n */\n\nvar _box$3 = new Box3();\n\nfunction BoxHelper( object, color ) {\n\n\tthis.object = object;\n\n\tif ( color === undefined ) color = 0xffff00;\n\n\tvar indices = new Uint16Array( [ 0, 1, 1, 2, 2, 3, 3, 0, 4, 5, 5, 6, 6, 7, 7, 4, 0, 4, 1, 5, 2, 6, 3, 7 ] );\n\tvar positions = new Float32Array( 8 * 3 );\n\n\tvar geometry = new BufferGeometry();\n\tgeometry.setIndex( new BufferAttribute( indices, 1 ) );\n\tgeometry.setAttribute( 'position', new BufferAttribute( positions, 3 ) );\n\n\tLineSegments.call( this, geometry, new LineBasicMaterial( { color: color } ) );\n\n\tthis.matrixAutoUpdate = false;\n\n\tthis.update();\n\n}\n\nBoxHelper.prototype = Object.create( LineSegments.prototype );\nBoxHelper.prototype.constructor = BoxHelper;\n\nBoxHelper.prototype.update = function ( object ) {\n\n\tif ( object !== undefined ) {\n\n\t\tconsole.warn( 'THREE.BoxHelper: .update() has no longer arguments.' );\n\n\t}\n\n\tif ( this.object !== undefined ) {\n\n\t\t_box$3.setFromObject( this.object );\n\n\t}\n\n\tif ( _box$3.isEmpty() ) return;\n\n\tvar min = _box$3.min;\n\tvar max = _box$3.max;\n\n\t/*\n\t  5____4\n\t1/___0/|\n\t| 6__|_7\n\t2/___3/\n\n\t0: max.x, max.y, max.z\n\t1: min.x, max.y, max.z\n\t2: min.x, min.y, max.z\n\t3: max.x, min.y, max.z\n\t4: max.x, max.y, min.z\n\t5: min.x, max.y, min.z\n\t6: min.x, min.y, min.z\n\t7: max.x, min.y, min.z\n\t*/\n\n\tvar position = this.geometry.attributes.position;\n\tvar array = position.array;\n\n\tarray[ 0 ] = max.x; array[ 1 ] = max.y; array[ 2 ] = max.z;\n\tarray[ 3 ] = min.x; array[ 4 ] = max.y; array[ 5 ] = max.z;\n\tarray[ 6 ] = min.x; array[ 7 ] = min.y; array[ 8 ] = max.z;\n\tarray[ 9 ] = max.x; array[ 10 ] = min.y; array[ 11 ] = max.z;\n\tarray[ 12 ] = max.x; array[ 13 ] = max.y; array[ 14 ] = min.z;\n\tarray[ 15 ] = min.x; array[ 16 ] = max.y; array[ 17 ] = min.z;\n\tarray[ 18 ] = min.x; array[ 19 ] = min.y; array[ 20 ] = min.z;\n\tarray[ 21 ] = max.x; array[ 22 ] = min.y; array[ 23 ] = min.z;\n\n\tposition.needsUpdate = true;\n\n\tthis.geometry.computeBoundingSphere();\n\n\n};\n\nBoxHelper.prototype.setFromObject = function ( object ) {\n\n\tthis.object = object;\n\tthis.update();\n\n\treturn this;\n\n};\n\nBoxHelper.prototype.copy = function ( source ) {\n\n\tLineSegments.prototype.copy.call( this, source );\n\n\tthis.object = source.object;\n\n\treturn this;\n\n};\n\nBoxHelper.prototype.clone = function () {\n\n\treturn new this.constructor().copy( this );\n\n};\n\n/**\n * @author WestLangley / http://github.com/WestLangley\n */\n\nfunction Box3Helper( box, color ) {\n\n\tthis.type = 'Box3Helper';\n\n\tthis.box = box;\n\n\tcolor = color || 0xffff00;\n\n\tvar indices = new Uint16Array( [ 0, 1, 1, 2, 2, 3, 3, 0, 4, 5, 5, 6, 6, 7, 7, 4, 0, 4, 1, 5, 2, 6, 3, 7 ] );\n\n\tvar positions = [ 1, 1, 1, - 1, 1, 1, - 1, - 1, 1, 1, - 1, 1, 1, 1, - 1, - 1, 1, - 1, - 1, - 1, - 1, 1, - 1, - 1 ];\n\n\tvar geometry = new BufferGeometry();\n\n\tgeometry.setIndex( new BufferAttribute( indices, 1 ) );\n\n\tgeometry.setAttribute( 'position', new Float32BufferAttribute( positions, 3 ) );\n\n\tLineSegments.call( this, geometry, new LineBasicMaterial( { color: color } ) );\n\n\tthis.geometry.computeBoundingSphere();\n\n}\n\nBox3Helper.prototype = Object.create( LineSegments.prototype );\nBox3Helper.prototype.constructor = Box3Helper;\n\nBox3Helper.prototype.updateMatrixWorld = function ( force ) {\n\n\tvar box = this.box;\n\n\tif ( box.isEmpty() ) return;\n\n\tbox.getCenter( this.position );\n\n\tbox.getSize( this.scale );\n\n\tthis.scale.multiplyScalar( 0.5 );\n\n\tObject3D.prototype.updateMatrixWorld.call( this, force );\n\n};\n\n/**\n * @author WestLangley / http://github.com/WestLangley\n */\n\nfunction PlaneHelper( plane, size, hex ) {\n\n\tthis.type = 'PlaneHelper';\n\n\tthis.plane = plane;\n\n\tthis.size = ( size === undefined ) ? 1 : size;\n\n\tvar color = ( hex !== undefined ) ? hex : 0xffff00;\n\n\tvar positions = [ 1, - 1, 1, - 1, 1, 1, - 1, - 1, 1, 1, 1, 1, - 1, 1, 1, - 1, - 1, 1, 1, - 1, 1, 1, 1, 1, 0, 0, 1, 0, 0, 0 ];\n\n\tvar geometry = new BufferGeometry();\n\tgeometry.setAttribute( 'position', new Float32BufferAttribute( positions, 3 ) );\n\tgeometry.computeBoundingSphere();\n\n\tLine.call( this, geometry, new LineBasicMaterial( { color: color } ) );\n\n\t//\n\n\tvar positions2 = [ 1, 1, 1, - 1, 1, 1, - 1, - 1, 1, 1, 1, 1, - 1, - 1, 1, 1, - 1, 1 ];\n\n\tvar geometry2 = new BufferGeometry();\n\tgeometry2.setAttribute( 'position', new Float32BufferAttribute( positions2, 3 ) );\n\tgeometry2.computeBoundingSphere();\n\n\tthis.add( new Mesh( geometry2, new MeshBasicMaterial( { color: color, opacity: 0.2, transparent: true, depthWrite: false } ) ) );\n\n}\n\nPlaneHelper.prototype = Object.create( Line.prototype );\nPlaneHelper.prototype.constructor = PlaneHelper;\n\nPlaneHelper.prototype.updateMatrixWorld = function ( force ) {\n\n\tvar scale = - this.plane.constant;\n\n\tif ( Math.abs( scale ) < 1e-8 ) scale = 1e-8; // sign does not matter\n\n\tthis.scale.set( 0.5 * this.size, 0.5 * this.size, scale );\n\n\tthis.children[ 0 ].material.side = ( scale < 0 ) ? BackSide : FrontSide; // renderer flips side when determinant < 0; flipping not wanted here\n\n\tthis.lookAt( this.plane.normal );\n\n\tObject3D.prototype.updateMatrixWorld.call( this, force );\n\n};\n\n/**\n * @author WestLangley / http://github.com/WestLangley\n * @author zz85 / http://github.com/zz85\n * @author bhouston / http://clara.io\n *\n * Creates an arrow for visualizing directions\n *\n * Parameters:\n *  dir - Vector3\n *  origin - Vector3\n *  length - Number\n *  color - color in hex value\n *  headLength - Number\n *  headWidth - Number\n */\n\nvar _axis = new Vector3();\nvar _lineGeometry, _coneGeometry;\n\nfunction ArrowHelper( dir, origin, length, color, headLength, headWidth ) {\n\n\t// dir is assumed to be normalized\n\n\tObject3D.call( this );\n\n\tif ( dir === undefined ) dir = new Vector3( 0, 0, 1 );\n\tif ( origin === undefined ) origin = new Vector3( 0, 0, 0 );\n\tif ( length === undefined ) length = 1;\n\tif ( color === undefined ) color = 0xffff00;\n\tif ( headLength === undefined ) headLength = 0.2 * length;\n\tif ( headWidth === undefined ) headWidth = 0.2 * headLength;\n\n\tif ( _lineGeometry === undefined ) {\n\n\t\t_lineGeometry = new BufferGeometry();\n\t\t_lineGeometry.setAttribute( 'position', new Float32BufferAttribute( [ 0, 0, 0, 0, 1, 0 ], 3 ) );\n\n\t\t_coneGeometry = new CylinderBufferGeometry( 0, 0.5, 1, 5, 1 );\n\t\t_coneGeometry.translate( 0, - 0.5, 0 );\n\n\t}\n\n\tthis.position.copy( origin );\n\n\tthis.line = new Line( _lineGeometry, new LineBasicMaterial( { color: color } ) );\n\tthis.line.matrixAutoUpdate = false;\n\tthis.add( this.line );\n\n\tthis.cone = new Mesh( _coneGeometry, new MeshBasicMaterial( { color: color } ) );\n\tthis.cone.matrixAutoUpdate = false;\n\tthis.add( this.cone );\n\n\tthis.setDirection( dir );\n\tthis.setLength( length, headLength, headWidth );\n\n}\n\nArrowHelper.prototype = Object.create( Object3D.prototype );\nArrowHelper.prototype.constructor = ArrowHelper;\n\nArrowHelper.prototype.setDirection = function ( dir ) {\n\n\t// dir is assumed to be normalized\n\n\tif ( dir.y > 0.99999 ) {\n\n\t\tthis.quaternion.set( 0, 0, 0, 1 );\n\n\t} else if ( dir.y < - 0.99999 ) {\n\n\t\tthis.quaternion.set( 1, 0, 0, 0 );\n\n\t} else {\n\n\t\t_axis.set( dir.z, 0, - dir.x ).normalize();\n\n\t\tvar radians = Math.acos( dir.y );\n\n\t\tthis.quaternion.setFromAxisAngle( _axis, radians );\n\n\t}\n\n};\n\nArrowHelper.prototype.setLength = function ( length, headLength, headWidth ) {\n\n\tif ( headLength === undefined ) headLength = 0.2 * length;\n\tif ( headWidth === undefined ) headWidth = 0.2 * headLength;\n\n\tthis.line.scale.set( 1, Math.max( 0.0001, length - headLength ), 1 ); // see #17458\n\tthis.line.updateMatrix();\n\n\tthis.cone.scale.set( headWidth, headLength, headWidth );\n\tthis.cone.position.y = length;\n\tthis.cone.updateMatrix();\n\n};\n\nArrowHelper.prototype.setColor = function ( color ) {\n\n\tthis.line.material.color.set( color );\n\tthis.cone.material.color.set( color );\n\n};\n\nArrowHelper.prototype.copy = function ( source ) {\n\n\tObject3D.prototype.copy.call( this, source, false );\n\n\tthis.line.copy( source.line );\n\tthis.cone.copy( source.cone );\n\n\treturn this;\n\n};\n\nArrowHelper.prototype.clone = function () {\n\n\treturn new this.constructor().copy( this );\n\n};\n\n/**\n * @author sroucheray / http://sroucheray.org/\n * @author mrdoob / http://mrdoob.com/\n */\n\nfunction AxesHelper( size ) {\n\n\tsize = size || 1;\n\n\tvar vertices = [\n\t\t0, 0, 0,\tsize, 0, 0,\n\t\t0, 0, 0,\t0, size, 0,\n\t\t0, 0, 0,\t0, 0, size\n\t];\n\n\tvar colors = [\n\t\t1, 0, 0,\t1, 0.6, 0,\n\t\t0, 1, 0,\t0.6, 1, 0,\n\t\t0, 0, 1,\t0, 0.6, 1\n\t];\n\n\tvar geometry = new BufferGeometry();\n\tgeometry.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );\n\tgeometry.setAttribute( 'color', new Float32BufferAttribute( colors, 3 ) );\n\n\tvar material = new LineBasicMaterial( { vertexColors: true } );\n\n\tLineSegments.call( this, geometry, material );\n\n}\n\nAxesHelper.prototype = Object.create( LineSegments.prototype );\nAxesHelper.prototype.constructor = AxesHelper;\n\n/**\n * @author Emmett Lalish / elalish\n *\n * This class generates a Prefiltered, Mipmapped Radiance Environment Map\n * (PMREM) from a cubeMap environment texture. This allows different levels of\n * blur to be quickly accessed based on material roughness. It is packed into a\n * special CubeUV format that allows us to perform custom interpolation so that\n * we can support nonlinear formats such as RGBE. Unlike a traditional mipmap\n * chain, it only goes down to the LOD_MIN level (above), and then creates extra\n * even more filtered 'mips' at the same LOD_MIN resolution, associated with\n * higher roughness levels. In this way we maintain resolution to smoothly\n * interpolate diffuse lighting while limiting sampling computation.\n */\n\nvar LOD_MIN = 4;\nvar LOD_MAX = 8;\n// The standard deviations (radians) associated with the extra mips. These are\n// chosen to approximate a Trowbridge-Reitz distribution function times the\n// geometric shadowing function. These sigma values squared must match the\n// variance #defines in cube_uv_reflection_fragment.glsl.js.\nvar EXTRA_LOD_SIGMA = [ 0.125, 0.215, 0.35, 0.446, 0.526, 0.582 ];\nvar TOTAL_LODS = LOD_MAX - LOD_MIN + 1 + EXTRA_LOD_SIGMA.length;\n// The maximum length of the blur for loop. Smaller sigmas will use fewer\n// samples and exit early, but not recompile the shader.\nvar MAX_SAMPLES = 20;\nvar ENCODINGS = {\n\t[ LinearEncoding ]: 0,\n\t[ sRGBEncoding ]: 1,\n\t[ RGBEEncoding ]: 2,\n\t[ RGBM7Encoding ]: 3,\n\t[ RGBM16Encoding ]: 4,\n\t[ RGBDEncoding ]: 5,\n\t[ GammaEncoding ]: 6\n};\n\nvar _flatCamera = new OrthographicCamera();\nvar _blurMaterial = _getBlurShader( MAX_SAMPLES );\n\nvar { _lodPlanes, _sizeLods, _sigmas } = _createPlanes();\n\nfunction _createPlanes() {\n\n\tvar _lodPlanes = [];\n\tvar _sizeLods = [];\n\tvar _sigmas = [];\n\n\tvar lod = LOD_MAX;\n\tfor ( var i = 0; i < TOTAL_LODS; i ++ ) {\n\n\t\tvar sizeLod = Math.pow( 2, lod );\n\t\t_sizeLods.push( sizeLod );\n\t\tvar sigma = 1.0 / sizeLod;\n\t\tif ( i > LOD_MAX - LOD_MIN ) {\n\n\t\t\tsigma = EXTRA_LOD_SIGMA[ i - LOD_MAX + LOD_MIN - 1 ];\n\n\t\t} else if ( i == 0 ) {\n\n\t\t\tsigma = 0;\n\n\t\t}\n\t\t_sigmas.push( sigma );\n\n\t\tvar texelSize = 1.0 / ( sizeLod - 1 );\n\t\tvar min = - texelSize / 2;\n\t\tvar max = 1 + texelSize / 2;\n\t\tvar uv1 = [ min, min, max, min, max, max, min, min, max, max, min, max ];\n\n\t\tvar cubeFaces = 6;\n\t\tvar vertices = 6;\n\t\tvar positionSize = 3;\n\t\tvar uvSize = 2;\n\t\tvar faceIndexSize = 1;\n\n\t\tvar position = new Float32Array( positionSize * vertices * cubeFaces );\n\t\tvar uv = new Float32Array( uvSize * vertices * cubeFaces );\n\t\tvar faceIndex = new Float32Array( faceIndexSize * vertices * cubeFaces );\n\n\t\tfor ( var face = 0; face < cubeFaces; face ++ ) {\n\n\t\t\tvar x = ( face % 3 ) * 2 / 3 - 1;\n\t\t\tvar y = face > 2 ? 0 : - 1;\n\t\t\tvar coordinates = [\n\t\t\t\tx, y, 0,\n\t\t\t\tx + 2 / 3, y, 0,\n\t\t\t\tx + 2 / 3, y + 1, 0,\n\t\t\t\tx, y, 0,\n\t\t\t\tx + 2 / 3, y + 1, 0,\n\t\t\t\tx, y + 1, 0\n\t\t\t];\n\t\t\tposition.set( coordinates, positionSize * vertices * face );\n\t\t\tuv.set( uv1, uvSize * vertices * face );\n\t\t\tvar fill = [ face, face, face, face, face, face ];\n\t\t\tfaceIndex.set( fill, faceIndexSize * vertices * face );\n\n\t\t}\n\t\tvar planes = new BufferGeometry();\n\t\tplanes.setAttribute( 'position', new BufferAttribute( position, positionSize ) );\n\t\tplanes.setAttribute( 'uv', new BufferAttribute( uv, uvSize ) );\n\t\tplanes.setAttribute( 'faceIndex', new BufferAttribute( faceIndex, faceIndexSize ) );\n\t\t_lodPlanes.push( planes );\n\n\t\tif ( lod > LOD_MIN ) {\n\n\t\t\tlod --;\n\n\t\t}\n\n\t}\n\treturn { _lodPlanes, _sizeLods, _sigmas };\n\n}\n\nfunction _getBlurShader( maxSamples ) {\n\n\tvar weights = new Float32Array( maxSamples );\n\tvar poleAxis = new Vector3( 0, 1, 0 );\n\tvar shaderMaterial = new RawShaderMaterial( {\n\n\t\tdefines: { 'n': maxSamples },\n\n\t\tuniforms: {\n\t\t\t'envMap': { value: null },\n\t\t\t'samples': { value: 1 },\n\t\t\t'weights': { value: weights },\n\t\t\t'latitudinal': { value: false },\n\t\t\t'dTheta': { value: 0 },\n\t\t\t'mipInt': { value: 0 },\n\t\t\t'poleAxis': { value: poleAxis },\n\t\t\t'inputEncoding': { value: ENCODINGS[ LinearEncoding ] },\n\t\t\t'outputEncoding': { value: ENCODINGS[ LinearEncoding ] }\n\t\t},\n\n\t\tvertexShader: _getCommonVertexShader(),\n\n\t\tfragmentShader: `\nprecision mediump float;\nprecision mediump int;\nvarying vec3 vOutputDirection;\nuniform sampler2D envMap;\nuniform int samples;\nuniform float weights[n];\nuniform bool latitudinal;\nuniform float dTheta;\nuniform float mipInt;\nuniform vec3 poleAxis;\n\n${_getEncodings()}\n\n#define ENVMAP_TYPE_CUBE_UV\n#include <cube_uv_reflection_fragment>\n\nvoid main() {\n\tgl_FragColor = vec4(0.0);\n\tfor (int i = 0; i < n; i++) {\n\t\tif (i >= samples)\n\t\t\tbreak;\n\t\tfor (int dir = -1; dir < 2; dir += 2) {\n\t\t\tif (i == 0 && dir == 1)\n\t\t\t\tcontinue;\n\t\t\tvec3 axis = latitudinal ? poleAxis : cross(poleAxis, vOutputDirection);\n\t\t\tif (all(equal(axis, vec3(0.0))))\n\t\t\t\taxis = cross(vec3(0.0, 1.0, 0.0), vOutputDirection);\n\t\t\taxis = normalize(axis);\n\t\t\tfloat theta = dTheta * float(dir * i);\n\t\t\tfloat cosTheta = cos(theta);\n\t\t\t// Rodrigues' axis-angle rotation\n\t\t\tvec3 sampleDirection = vOutputDirection * cosTheta\n\t\t\t\t\t+ cross(axis, vOutputDirection) * sin(theta)\n\t\t\t\t\t+ axis * dot(axis, vOutputDirection) * (1.0 - cosTheta);\n\t\t\tgl_FragColor.rgb +=\n\t\t\t\t\tweights[i] * bilinearCubeUV(envMap, sampleDirection, mipInt);\n\t\t}\n\t}\n\tgl_FragColor = linearToOutputTexel(gl_FragColor);\n}\n\t\t`,\n\n\t\tblending: NoBlending,\n\t\tdepthTest: false,\n\t\tdepthWrite: false\n\n\t} );\n\n\tshaderMaterial.type = 'SphericalGaussianBlur';\n\n\treturn shaderMaterial;\n\n}\n\nfunction _getCommonVertexShader() {\n\n\treturn `\nprecision mediump float;\nprecision mediump int;\nattribute vec3 position;\nattribute vec2 uv;\nattribute float faceIndex;\nvarying vec3 vOutputDirection;\nvec3 getDirection(vec2 uv, float face) {\n\tuv = 2.0 * uv - 1.0;\n\tvec3 direction = vec3(uv, 1.0);\n\tif (face == 0.0) {\n\t\tdirection = direction.zyx;\n\t\tdirection.z *= -1.0;\n\t} else if (face == 1.0) {\n\t\tdirection = direction.xzy;\n\t\tdirection.z *= -1.0;\n\t} else if (face == 3.0) {\n\t\tdirection = direction.zyx;\n\t\tdirection.x *= -1.0;\n\t} else if (face == 4.0) {\n\t\tdirection = direction.xzy;\n\t\tdirection.y *= -1.0;\n\t} else if (face == 5.0) {\n\t\tdirection.xz *= -1.0;\n\t}\n\treturn direction;\n}\nvoid main() {\n\tvOutputDirection = getDirection(uv, faceIndex);\n\tgl_Position = vec4( position, 1.0 );\n}\n\t`;\n\n}\n\nfunction _getEncodings() {\n\n\treturn `\nuniform int inputEncoding;\nuniform int outputEncoding;\n\n#include <encodings_pars_fragment>\n\nvec4 inputTexelToLinear(vec4 value){\n\tif(inputEncoding == 0){\n\t\treturn value;\n\t}else if(inputEncoding == 1){\n\t\treturn sRGBToLinear(value);\n\t}else if(inputEncoding == 2){\n\t\treturn RGBEToLinear(value);\n\t}else if(inputEncoding == 3){\n\t\treturn RGBMToLinear(value, 7.0);\n\t}else if(inputEncoding == 4){\n\t\treturn RGBMToLinear(value, 16.0);\n\t}else if(inputEncoding == 5){\n\t\treturn RGBDToLinear(value, 256.0);\n\t}else{\n\t\treturn GammaToLinear(value, 2.2);\n\t}\n}\n\nvec4 linearToOutputTexel(vec4 value){\n\tif(outputEncoding == 0){\n\t\treturn value;\n\t}else if(outputEncoding == 1){\n\t\treturn LinearTosRGB(value);\n\t}else if(outputEncoding == 2){\n\t\treturn LinearToRGBE(value);\n\t}else if(outputEncoding == 3){\n\t\treturn LinearToRGBM(value, 7.0);\n\t}else if(outputEncoding == 4){\n\t\treturn LinearToRGBM(value, 16.0);\n\t}else if(outputEncoding == 5){\n\t\treturn LinearToRGBD(value, 256.0);\n\t}else{\n\t\treturn LinearToGamma(value, 2.2);\n\t}\n}\n\nvec4 envMapTexelToLinear(vec4 color) {\n\treturn inputTexelToLinear(color);\n}\n\t`;\n\n}\n\n//\n\nCurve.create = function ( construct, getPoint ) {\n\n\tconsole.log( 'THREE.Curve.create() has been deprecated' );\n\n\tconstruct.prototype = Object.create( Curve.prototype );\n\tconstruct.prototype.constructor = construct;\n\tconstruct.prototype.getPoint = getPoint;\n\n\treturn construct;\n\n};\n\n//\n\nObject.assign( CurvePath.prototype, {\n\n\tcreatePointsGeometry: function ( divisions ) {\n\n\t\tconsole.warn( 'THREE.CurvePath: .createPointsGeometry() has been removed. Use new THREE.Geometry().setFromPoints( points ) instead.' );\n\n\t\t// generate geometry from path points (for Line or Points objects)\n\n\t\tvar pts = this.getPoints( divisions );\n\t\treturn this.createGeometry( pts );\n\n\t},\n\n\tcreateSpacedPointsGeometry: function ( divisions ) {\n\n\t\tconsole.warn( 'THREE.CurvePath: .createSpacedPointsGeometry() has been removed. Use new THREE.Geometry().setFromPoints( points ) instead.' );\n\n\t\t// generate geometry from equidistant sampling along the path\n\n\t\tvar pts = this.getSpacedPoints( divisions );\n\t\treturn this.createGeometry( pts );\n\n\t},\n\n\tcreateGeometry: function ( points ) {\n\n\t\tconsole.warn( 'THREE.CurvePath: .createGeometry() has been removed. Use new THREE.Geometry().setFromPoints( points ) instead.' );\n\n\t\tvar geometry = new Geometry();\n\n\t\tfor ( var i = 0, l = points.length; i < l; i ++ ) {\n\n\t\t\tvar point = points[ i ];\n\t\t\tgeometry.vertices.push( new Vector3( point.x, point.y, point.z || 0 ) );\n\n\t\t}\n\n\t\treturn geometry;\n\n\t}\n\n} );\n\n//\n\nObject.assign( Path.prototype, {\n\n\tfromPoints: function ( points ) {\n\n\t\tconsole.warn( 'THREE.Path: .fromPoints() has been renamed to .setFromPoints().' );\n\t\treturn this.setFromPoints( points );\n\n\t}\n\n} );\n\n//\n\nfunction Spline( points ) {\n\n\tconsole.warn( 'THREE.Spline has been removed. Use THREE.CatmullRomCurve3 instead.' );\n\n\tCatmullRomCurve3.call( this, points );\n\tthis.type = 'catmullrom';\n\n}\n\nSpline.prototype = Object.create( CatmullRomCurve3.prototype );\n\nObject.assign( Spline.prototype, {\n\n\tinitFromArray: function ( /* a */ ) {\n\n\t\tconsole.error( 'THREE.Spline: .initFromArray() has been removed.' );\n\n\t},\n\tgetControlPointsArray: function ( /* optionalTarget */ ) {\n\n\t\tconsole.error( 'THREE.Spline: .getControlPointsArray() has been removed.' );\n\n\t},\n\treparametrizeByArcLength: function ( /* samplingCoef */ ) {\n\n\t\tconsole.error( 'THREE.Spline: .reparametrizeByArcLength() has been removed.' );\n\n\t}\n\n} );\n\nGridHelper.prototype.setColors = function () {\n\n\tconsole.error( 'THREE.GridHelper: setColors() has been deprecated, pass them in the constructor instead.' );\n\n};\n\nSkeletonHelper.prototype.update = function () {\n\n\tconsole.error( 'THREE.SkeletonHelper: update() no longer needs to be called.' );\n\n};\n\n//\n\nObject.assign( Loader.prototype, {\n\n\textractUrlBase: function ( url ) {\n\n\t\tconsole.warn( 'THREE.Loader: .extractUrlBase() has been deprecated. Use THREE.LoaderUtils.extractUrlBase() instead.' );\n\t\treturn LoaderUtils.extractUrlBase( url );\n\n\t}\n\n} );\n\nLoader.Handlers = {\n\n\tadd: function ( /* regex, loader */ ) {\n\n\t\tconsole.error( 'THREE.Loader: Handlers.add() has been removed. Use LoadingManager.addHandler() instead.' );\n\n\t},\n\n\tget: function ( /* file */ ) {\n\n\t\tconsole.error( 'THREE.Loader: Handlers.get() has been removed. Use LoadingManager.getHandler() instead.' );\n\n\t}\n\n};\n\nObject.assign( ObjectLoader.prototype, {\n\n\tsetTexturePath: function ( value ) {\n\n\t\tconsole.warn( 'THREE.ObjectLoader: .setTexturePath() has been renamed to .setResourcePath().' );\n\t\treturn this.setResourcePath( value );\n\n\t}\n\n} );\n\n//\n\nObject.assign( Box2.prototype, {\n\n\tcenter: function ( optionalTarget ) {\n\n\t\tconsole.warn( 'THREE.Box2: .center() has been renamed to .getCenter().' );\n\t\treturn this.getCenter( optionalTarget );\n\n\t},\n\tempty: function () {\n\n\t\tconsole.warn( 'THREE.Box2: .empty() has been renamed to .isEmpty().' );\n\t\treturn this.isEmpty();\n\n\t},\n\tisIntersectionBox: function ( box ) {\n\n\t\tconsole.warn( 'THREE.Box2: .isIntersectionBox() has been renamed to .intersectsBox().' );\n\t\treturn this.intersectsBox( box );\n\n\t},\n\tsize: function ( optionalTarget ) {\n\n\t\tconsole.warn( 'THREE.Box2: .size() has been renamed to .getSize().' );\n\t\treturn this.getSize( optionalTarget );\n\n\t}\n} );\n\nObject.assign( Box3.prototype, {\n\n\tcenter: function ( optionalTarget ) {\n\n\t\tconsole.warn( 'THREE.Box3: .center() has been renamed to .getCenter().' );\n\t\treturn this.getCenter( optionalTarget );\n\n\t},\n\tempty: function () {\n\n\t\tconsole.warn( 'THREE.Box3: .empty() has been renamed to .isEmpty().' );\n\t\treturn this.isEmpty();\n\n\t},\n\tisIntersectionBox: function ( box ) {\n\n\t\tconsole.warn( 'THREE.Box3: .isIntersectionBox() has been renamed to .intersectsBox().' );\n\t\treturn this.intersectsBox( box );\n\n\t},\n\tisIntersectionSphere: function ( sphere ) {\n\n\t\tconsole.warn( 'THREE.Box3: .isIntersectionSphere() has been renamed to .intersectsSphere().' );\n\t\treturn this.intersectsSphere( sphere );\n\n\t},\n\tsize: function ( optionalTarget ) {\n\n\t\tconsole.warn( 'THREE.Box3: .size() has been renamed to .getSize().' );\n\t\treturn this.getSize( optionalTarget );\n\n\t}\n} );\n\nFrustum.prototype.setFromMatrix = function ( m ) {\n\n\tconsole.warn( 'THREE.Frustum: .setFromMatrix() has been renamed to .setFromProjectionMatrix().' );\n\treturn this.setFromProjectionMatrix( m );\n\n};\n\nLine3.prototype.center = function ( optionalTarget ) {\n\n\tconsole.warn( 'THREE.Line3: .center() has been renamed to .getCenter().' );\n\treturn this.getCenter( optionalTarget );\n\n};\n\nObject.assign( MathUtils, {\n\n\trandom16: function () {\n\n\t\tconsole.warn( 'THREE.Math: .random16() has been deprecated. Use Math.random() instead.' );\n\t\treturn Math.random();\n\n\t},\n\n\tnearestPowerOfTwo: function ( value ) {\n\n\t\tconsole.warn( 'THREE.Math: .nearestPowerOfTwo() has been renamed to .floorPowerOfTwo().' );\n\t\treturn MathUtils.floorPowerOfTwo( value );\n\n\t},\n\n\tnextPowerOfTwo: function ( value ) {\n\n\t\tconsole.warn( 'THREE.Math: .nextPowerOfTwo() has been renamed to .ceilPowerOfTwo().' );\n\t\treturn MathUtils.ceilPowerOfTwo( value );\n\n\t}\n\n} );\n\nObject.assign( Matrix3.prototype, {\n\n\tflattenToArrayOffset: function ( array, offset ) {\n\n\t\tconsole.warn( \"THREE.Matrix3: .flattenToArrayOffset() has been deprecated. Use .toArray() instead.\" );\n\t\treturn this.toArray( array, offset );\n\n\t},\n\tmultiplyVector3: function ( vector ) {\n\n\t\tconsole.warn( 'THREE.Matrix3: .multiplyVector3() has been removed. Use vector.applyMatrix3( matrix ) instead.' );\n\t\treturn vector.applyMatrix3( this );\n\n\t},\n\tmultiplyVector3Array: function ( /* a */ ) {\n\n\t\tconsole.error( 'THREE.Matrix3: .multiplyVector3Array() has been removed.' );\n\n\t},\n\tapplyToBufferAttribute: function ( attribute ) {\n\n\t\tconsole.warn( 'THREE.Matrix3: .applyToBufferAttribute() has been removed. Use attribute.applyMatrix3( matrix ) instead.' );\n\t\treturn attribute.applyMatrix3( this );\n\n\t},\n\tapplyToVector3Array: function ( /* array, offset, length */ ) {\n\n\t\tconsole.error( 'THREE.Matrix3: .applyToVector3Array() has been removed.' );\n\n\t}\n\n} );\n\nObject.assign( Matrix4.prototype, {\n\n\textractPosition: function ( m ) {\n\n\t\tconsole.warn( 'THREE.Matrix4: .extractPosition() has been renamed to .copyPosition().' );\n\t\treturn this.copyPosition( m );\n\n\t},\n\tflattenToArrayOffset: function ( array, offset ) {\n\n\t\tconsole.warn( \"THREE.Matrix4: .flattenToArrayOffset() has been deprecated. Use .toArray() instead.\" );\n\t\treturn this.toArray( array, offset );\n\n\t},\n\tgetPosition: function () {\n\n\t\tconsole.warn( 'THREE.Matrix4: .getPosition() has been removed. Use Vector3.setFromMatrixPosition( matrix ) instead.' );\n\t\treturn new Vector3().setFromMatrixColumn( this, 3 );\n\n\t},\n\tsetRotationFromQuaternion: function ( q ) {\n\n\t\tconsole.warn( 'THREE.Matrix4: .setRotationFromQuaternion() has been renamed to .makeRotationFromQuaternion().' );\n\t\treturn this.makeRotationFromQuaternion( q );\n\n\t},\n\tmultiplyToArray: function () {\n\n\t\tconsole.warn( 'THREE.Matrix4: .multiplyToArray() has been removed.' );\n\n\t},\n\tmultiplyVector3: function ( vector ) {\n\n\t\tconsole.warn( 'THREE.Matrix4: .multiplyVector3() has been removed. Use vector.applyMatrix4( matrix ) instead.' );\n\t\treturn vector.applyMatrix4( this );\n\n\t},\n\tmultiplyVector4: function ( vector ) {\n\n\t\tconsole.warn( 'THREE.Matrix4: .multiplyVector4() has been removed. Use vector.applyMatrix4( matrix ) instead.' );\n\t\treturn vector.applyMatrix4( this );\n\n\t},\n\tmultiplyVector3Array: function ( /* a */ ) {\n\n\t\tconsole.error( 'THREE.Matrix4: .multiplyVector3Array() has been removed.' );\n\n\t},\n\trotateAxis: function ( v ) {\n\n\t\tconsole.warn( 'THREE.Matrix4: .rotateAxis() has been removed. Use Vector3.transformDirection( matrix ) instead.' );\n\t\tv.transformDirection( this );\n\n\t},\n\tcrossVector: function ( vector ) {\n\n\t\tconsole.warn( 'THREE.Matrix4: .crossVector() has been removed. Use vector.applyMatrix4( matrix ) instead.' );\n\t\treturn vector.applyMatrix4( this );\n\n\t},\n\ttranslate: function () {\n\n\t\tconsole.error( 'THREE.Matrix4: .translate() has been removed.' );\n\n\t},\n\trotateX: function () {\n\n\t\tconsole.error( 'THREE.Matrix4: .rotateX() has been removed.' );\n\n\t},\n\trotateY: function () {\n\n\t\tconsole.error( 'THREE.Matrix4: .rotateY() has been removed.' );\n\n\t},\n\trotateZ: function () {\n\n\t\tconsole.error( 'THREE.Matrix4: .rotateZ() has been removed.' );\n\n\t},\n\trotateByAxis: function () {\n\n\t\tconsole.error( 'THREE.Matrix4: .rotateByAxis() has been removed.' );\n\n\t},\n\tapplyToBufferAttribute: function ( attribute ) {\n\n\t\tconsole.warn( 'THREE.Matrix4: .applyToBufferAttribute() has been removed. Use attribute.applyMatrix4( matrix ) instead.' );\n\t\treturn attribute.applyMatrix4( this );\n\n\t},\n\tapplyToVector3Array: function ( /* array, offset, length */ ) {\n\n\t\tconsole.error( 'THREE.Matrix4: .applyToVector3Array() has been removed.' );\n\n\t},\n\tmakeFrustum: function ( left, right, bottom, top, near, far ) {\n\n\t\tconsole.warn( 'THREE.Matrix4: .makeFrustum() has been removed. Use .makePerspective( left, right, top, bottom, near, far ) instead.' );\n\t\treturn this.makePerspective( left, right, top, bottom, near, far );\n\n\t}\n\n} );\n\nPlane.prototype.isIntersectionLine = function ( line ) {\n\n\tconsole.warn( 'THREE.Plane: .isIntersectionLine() has been renamed to .intersectsLine().' );\n\treturn this.intersectsLine( line );\n\n};\n\nQuaternion.prototype.multiplyVector3 = function ( vector ) {\n\n\tconsole.warn( 'THREE.Quaternion: .multiplyVector3() has been removed. Use is now vector.applyQuaternion( quaternion ) instead.' );\n\treturn vector.applyQuaternion( this );\n\n};\n\nObject.assign( Ray.prototype, {\n\n\tisIntersectionBox: function ( box ) {\n\n\t\tconsole.warn( 'THREE.Ray: .isIntersectionBox() has been renamed to .intersectsBox().' );\n\t\treturn this.intersectsBox( box );\n\n\t},\n\tisIntersectionPlane: function ( plane ) {\n\n\t\tconsole.warn( 'THREE.Ray: .isIntersectionPlane() has been renamed to .intersectsPlane().' );\n\t\treturn this.intersectsPlane( plane );\n\n\t},\n\tisIntersectionSphere: function ( sphere ) {\n\n\t\tconsole.warn( 'THREE.Ray: .isIntersectionSphere() has been renamed to .intersectsSphere().' );\n\t\treturn this.intersectsSphere( sphere );\n\n\t}\n\n} );\n\nObject.assign( Triangle.prototype, {\n\n\tarea: function () {\n\n\t\tconsole.warn( 'THREE.Triangle: .area() has been renamed to .getArea().' );\n\t\treturn this.getArea();\n\n\t},\n\tbarycoordFromPoint: function ( point, target ) {\n\n\t\tconsole.warn( 'THREE.Triangle: .barycoordFromPoint() has been renamed to .getBarycoord().' );\n\t\treturn this.getBarycoord( point, target );\n\n\t},\n\tmidpoint: function ( target ) {\n\n\t\tconsole.warn( 'THREE.Triangle: .midpoint() has been renamed to .getMidpoint().' );\n\t\treturn this.getMidpoint( target );\n\n\t},\n\tnormal: function ( target ) {\n\n\t\tconsole.warn( 'THREE.Triangle: .normal() has been renamed to .getNormal().' );\n\t\treturn this.getNormal( target );\n\n\t},\n\tplane: function ( target ) {\n\n\t\tconsole.warn( 'THREE.Triangle: .plane() has been renamed to .getPlane().' );\n\t\treturn this.getPlane( target );\n\n\t}\n\n} );\n\nObject.assign( Triangle, {\n\n\tbarycoordFromPoint: function ( point, a, b, c, target ) {\n\n\t\tconsole.warn( 'THREE.Triangle: .barycoordFromPoint() has been renamed to .getBarycoord().' );\n\t\treturn Triangle.getBarycoord( point, a, b, c, target );\n\n\t},\n\tnormal: function ( a, b, c, target ) {\n\n\t\tconsole.warn( 'THREE.Triangle: .normal() has been renamed to .getNormal().' );\n\t\treturn Triangle.getNormal( a, b, c, target );\n\n\t}\n\n} );\n\nObject.assign( Shape.prototype, {\n\n\textractAllPoints: function ( divisions ) {\n\n\t\tconsole.warn( 'THREE.Shape: .extractAllPoints() has been removed. Use .extractPoints() instead.' );\n\t\treturn this.extractPoints( divisions );\n\n\t},\n\textrude: function ( options ) {\n\n\t\tconsole.warn( 'THREE.Shape: .extrude() has been removed. Use ExtrudeGeometry() instead.' );\n\t\treturn new ExtrudeGeometry( this, options );\n\n\t},\n\tmakeGeometry: function ( options ) {\n\n\t\tconsole.warn( 'THREE.Shape: .makeGeometry() has been removed. Use ShapeGeometry() instead.' );\n\t\treturn new ShapeGeometry( this, options );\n\n\t}\n\n} );\n\nObject.assign( Vector2.prototype, {\n\n\tfromAttribute: function ( attribute, index, offset ) {\n\n\t\tconsole.warn( 'THREE.Vector2: .fromAttribute() has been renamed to .fromBufferAttribute().' );\n\t\treturn this.fromBufferAttribute( attribute, index, offset );\n\n\t},\n\tdistanceToManhattan: function ( v ) {\n\n\t\tconsole.warn( 'THREE.Vector2: .distanceToManhattan() has been renamed to .manhattanDistanceTo().' );\n\t\treturn this.manhattanDistanceTo( v );\n\n\t},\n\tlengthManhattan: function () {\n\n\t\tconsole.warn( 'THREE.Vector2: .lengthManhattan() has been renamed to .manhattanLength().' );\n\t\treturn this.manhattanLength();\n\n\t}\n\n} );\n\nObject.assign( Vector3.prototype, {\n\n\tsetEulerFromRotationMatrix: function () {\n\n\t\tconsole.error( 'THREE.Vector3: .setEulerFromRotationMatrix() has been removed. Use Euler.setFromRotationMatrix() instead.' );\n\n\t},\n\tsetEulerFromQuaternion: function () {\n\n\t\tconsole.error( 'THREE.Vector3: .setEulerFromQuaternion() has been removed. Use Euler.setFromQuaternion() instead.' );\n\n\t},\n\tgetPositionFromMatrix: function ( m ) {\n\n\t\tconsole.warn( 'THREE.Vector3: .getPositionFromMatrix() has been renamed to .setFromMatrixPosition().' );\n\t\treturn this.setFromMatrixPosition( m );\n\n\t},\n\tgetScaleFromMatrix: function ( m ) {\n\n\t\tconsole.warn( 'THREE.Vector3: .getScaleFromMatrix() has been renamed to .setFromMatrixScale().' );\n\t\treturn this.setFromMatrixScale( m );\n\n\t},\n\tgetColumnFromMatrix: function ( index, matrix ) {\n\n\t\tconsole.warn( 'THREE.Vector3: .getColumnFromMatrix() has been renamed to .setFromMatrixColumn().' );\n\t\treturn this.setFromMatrixColumn( matrix, index );\n\n\t},\n\tapplyProjection: function ( m ) {\n\n\t\tconsole.warn( 'THREE.Vector3: .applyProjection() has been removed. Use .applyMatrix4( m ) instead.' );\n\t\treturn this.applyMatrix4( m );\n\n\t},\n\tfromAttribute: function ( attribute, index, offset ) {\n\n\t\tconsole.warn( 'THREE.Vector3: .fromAttribute() has been renamed to .fromBufferAttribute().' );\n\t\treturn this.fromBufferAttribute( attribute, index, offset );\n\n\t},\n\tdistanceToManhattan: function ( v ) {\n\n\t\tconsole.warn( 'THREE.Vector3: .distanceToManhattan() has been renamed to .manhattanDistanceTo().' );\n\t\treturn this.manhattanDistanceTo( v );\n\n\t},\n\tlengthManhattan: function () {\n\n\t\tconsole.warn( 'THREE.Vector3: .lengthManhattan() has been renamed to .manhattanLength().' );\n\t\treturn this.manhattanLength();\n\n\t}\n\n} );\n\nObject.assign( Vector4.prototype, {\n\n\tfromAttribute: function ( attribute, index, offset ) {\n\n\t\tconsole.warn( 'THREE.Vector4: .fromAttribute() has been renamed to .fromBufferAttribute().' );\n\t\treturn this.fromBufferAttribute( attribute, index, offset );\n\n\t},\n\tlengthManhattan: function () {\n\n\t\tconsole.warn( 'THREE.Vector4: .lengthManhattan() has been renamed to .manhattanLength().' );\n\t\treturn this.manhattanLength();\n\n\t}\n\n} );\n\n//\n\nObject.assign( Geometry.prototype, {\n\n\tcomputeTangents: function () {\n\n\t\tconsole.error( 'THREE.Geometry: .computeTangents() has been removed.' );\n\n\t},\n\tcomputeLineDistances: function () {\n\n\t\tconsole.error( 'THREE.Geometry: .computeLineDistances() has been removed. Use THREE.Line.computeLineDistances() instead.' );\n\n\t},\n\tapplyMatrix: function ( matrix ) {\n\n\t\tconsole.warn( 'THREE.Geometry: .applyMatrix() has been renamed to .applyMatrix4().' );\n\t\treturn this.applyMatrix4( matrix );\n\n\t}\n\n} );\n\nObject.assign( Object3D.prototype, {\n\n\tgetChildByName: function ( name ) {\n\n\t\tconsole.warn( 'THREE.Object3D: .getChildByName() has been renamed to .getObjectByName().' );\n\t\treturn this.getObjectByName( name );\n\n\t},\n\trenderDepth: function () {\n\n\t\tconsole.warn( 'THREE.Object3D: .renderDepth has been removed. Use .renderOrder, instead.' );\n\n\t},\n\ttranslate: function ( distance, axis ) {\n\n\t\tconsole.warn( 'THREE.Object3D: .translate() has been removed. Use .translateOnAxis( axis, distance ) instead.' );\n\t\treturn this.translateOnAxis( axis, distance );\n\n\t},\n\tgetWorldRotation: function () {\n\n\t\tconsole.error( 'THREE.Object3D: .getWorldRotation() has been removed. Use THREE.Object3D.getWorldQuaternion( target ) instead.' );\n\n\t},\n\tapplyMatrix: function ( matrix ) {\n\n\t\tconsole.warn( 'THREE.Object3D: .applyMatrix() has been renamed to .applyMatrix4().' );\n\t\treturn this.applyMatrix4( matrix );\n\n\t}\n\n} );\n\nObject.defineProperties( Object3D.prototype, {\n\n\teulerOrder: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.Object3D: .eulerOrder is now .rotation.order.' );\n\t\t\treturn this.rotation.order;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.Object3D: .eulerOrder is now .rotation.order.' );\n\t\t\tthis.rotation.order = value;\n\n\t\t}\n\t},\n\tuseQuaternion: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.Object3D: .useQuaternion has been removed. The library now uses quaternions by default.' );\n\n\t\t},\n\t\tset: function () {\n\n\t\t\tconsole.warn( 'THREE.Object3D: .useQuaternion has been removed. The library now uses quaternions by default.' );\n\n\t\t}\n\t}\n\n} );\n\nObject.assign( Mesh.prototype, {\n\n\tsetDrawMode: function () {\n\n\t\tconsole.error( 'THREE.Mesh: .setDrawMode() has been removed. The renderer now always assumes THREE.TrianglesDrawMode. Transform your geometry via BufferGeometryUtils.toTrianglesDrawMode() if necessary.' );\n\n\t},\n\n} );\n\nObject.defineProperties( Mesh.prototype, {\n\n\tdrawMode: {\n\t\tget: function () {\n\n\t\t\tconsole.error( 'THREE.Mesh: .drawMode has been removed. The renderer now always assumes THREE.TrianglesDrawMode.' );\n\t\t\treturn TrianglesDrawMode;\n\n\t\t},\n\t\tset: function () {\n\n\t\t\tconsole.error( 'THREE.Mesh: .drawMode has been removed. The renderer now always assumes THREE.TrianglesDrawMode. Transform your geometry via BufferGeometryUtils.toTrianglesDrawMode() if necessary.' );\n\n\t\t}\n\t}\n\n} );\n\nObject.defineProperties( LOD.prototype, {\n\n\tobjects: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.LOD: .objects has been renamed to .levels.' );\n\t\t\treturn this.levels;\n\n\t\t}\n\t}\n\n} );\n\nObject.defineProperty( Skeleton.prototype, 'useVertexTexture', {\n\n\tget: function () {\n\n\t\tconsole.warn( 'THREE.Skeleton: useVertexTexture has been removed.' );\n\n\t},\n\tset: function () {\n\n\t\tconsole.warn( 'THREE.Skeleton: useVertexTexture has been removed.' );\n\n\t}\n\n} );\n\nSkinnedMesh.prototype.initBones = function () {\n\n\tconsole.error( 'THREE.SkinnedMesh: initBones() has been removed.' );\n\n};\n\nObject.defineProperty( Curve.prototype, '__arcLengthDivisions', {\n\n\tget: function () {\n\n\t\tconsole.warn( 'THREE.Curve: .__arcLengthDivisions is now .arcLengthDivisions.' );\n\t\treturn this.arcLengthDivisions;\n\n\t},\n\tset: function ( value ) {\n\n\t\tconsole.warn( 'THREE.Curve: .__arcLengthDivisions is now .arcLengthDivisions.' );\n\t\tthis.arcLengthDivisions = value;\n\n\t}\n\n} );\n\n//\n\nPerspectiveCamera.prototype.setLens = function ( focalLength, filmGauge ) {\n\n\tconsole.warn( \"THREE.PerspectiveCamera.setLens is deprecated. \" +\n\t\t\t\"Use .setFocalLength and .filmGauge for a photographic setup.\" );\n\n\tif ( filmGauge !== undefined ) this.filmGauge = filmGauge;\n\tthis.setFocalLength( focalLength );\n\n};\n\n//\n\nObject.defineProperties( Light.prototype, {\n\tonlyShadow: {\n\t\tset: function () {\n\n\t\t\tconsole.warn( 'THREE.Light: .onlyShadow has been removed.' );\n\n\t\t}\n\t},\n\tshadowCameraFov: {\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.Light: .shadowCameraFov is now .shadow.camera.fov.' );\n\t\t\tthis.shadow.camera.fov = value;\n\n\t\t}\n\t},\n\tshadowCameraLeft: {\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.Light: .shadowCameraLeft is now .shadow.camera.left.' );\n\t\t\tthis.shadow.camera.left = value;\n\n\t\t}\n\t},\n\tshadowCameraRight: {\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.Light: .shadowCameraRight is now .shadow.camera.right.' );\n\t\t\tthis.shadow.camera.right = value;\n\n\t\t}\n\t},\n\tshadowCameraTop: {\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.Light: .shadowCameraTop is now .shadow.camera.top.' );\n\t\t\tthis.shadow.camera.top = value;\n\n\t\t}\n\t},\n\tshadowCameraBottom: {\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.Light: .shadowCameraBottom is now .shadow.camera.bottom.' );\n\t\t\tthis.shadow.camera.bottom = value;\n\n\t\t}\n\t},\n\tshadowCameraNear: {\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.Light: .shadowCameraNear is now .shadow.camera.near.' );\n\t\t\tthis.shadow.camera.near = value;\n\n\t\t}\n\t},\n\tshadowCameraFar: {\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.Light: .shadowCameraFar is now .shadow.camera.far.' );\n\t\t\tthis.shadow.camera.far = value;\n\n\t\t}\n\t},\n\tshadowCameraVisible: {\n\t\tset: function () {\n\n\t\t\tconsole.warn( 'THREE.Light: .shadowCameraVisible has been removed. Use new THREE.CameraHelper( light.shadow.camera ) instead.' );\n\n\t\t}\n\t},\n\tshadowBias: {\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.Light: .shadowBias is now .shadow.bias.' );\n\t\t\tthis.shadow.bias = value;\n\n\t\t}\n\t},\n\tshadowDarkness: {\n\t\tset: function () {\n\n\t\t\tconsole.warn( 'THREE.Light: .shadowDarkness has been removed.' );\n\n\t\t}\n\t},\n\tshadowMapWidth: {\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.Light: .shadowMapWidth is now .shadow.mapSize.width.' );\n\t\t\tthis.shadow.mapSize.width = value;\n\n\t\t}\n\t},\n\tshadowMapHeight: {\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.Light: .shadowMapHeight is now .shadow.mapSize.height.' );\n\t\t\tthis.shadow.mapSize.height = value;\n\n\t\t}\n\t}\n} );\n\n//\n\nObject.defineProperties( BufferAttribute.prototype, {\n\n\tlength: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.BufferAttribute: .length has been deprecated. Use .count instead.' );\n\t\t\treturn this.array.length;\n\n\t\t}\n\t},\n\tdynamic: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.BufferAttribute: .dynamic has been deprecated. Use .usage instead.' );\n\t\t\treturn this.usage === DynamicDrawUsage;\n\n\t\t},\n\t\tset: function ( /* value */ ) {\n\n\t\t\tconsole.warn( 'THREE.BufferAttribute: .dynamic has been deprecated. Use .usage instead.' );\n\t\t\tthis.setUsage( DynamicDrawUsage );\n\n\t\t}\n\t}\n\n} );\n\nObject.assign( BufferAttribute.prototype, {\n\tsetDynamic: function ( value ) {\n\n\t\tconsole.warn( 'THREE.BufferAttribute: .setDynamic() has been deprecated. Use .setUsage() instead.' );\n\t\tthis.setUsage( value === true ? DynamicDrawUsage : StaticDrawUsage );\n\t\treturn this;\n\n\t},\n\tcopyIndicesArray: function ( /* indices */ ) {\n\n\t\tconsole.error( 'THREE.BufferAttribute: .copyIndicesArray() has been removed.' );\n\n\t},\n\tsetArray: function ( /* array */ ) {\n\n\t\tconsole.error( 'THREE.BufferAttribute: .setArray has been removed. Use BufferGeometry .setAttribute to replace/resize attribute buffers' );\n\n\t}\n} );\n\nObject.assign( BufferGeometry.prototype, {\n\n\taddIndex: function ( index ) {\n\n\t\tconsole.warn( 'THREE.BufferGeometry: .addIndex() has been renamed to .setIndex().' );\n\t\tthis.setIndex( index );\n\n\t},\n\taddAttribute: function ( name, attribute ) {\n\n\t\tconsole.warn( 'THREE.BufferGeometry: .addAttribute() has been renamed to .setAttribute().' );\n\n\t\tif ( ! ( attribute && attribute.isBufferAttribute ) && ! ( attribute && attribute.isInterleavedBufferAttribute ) ) {\n\n\t\t\tconsole.warn( 'THREE.BufferGeometry: .addAttribute() now expects ( name, attribute ).' );\n\n\t\t\treturn this.setAttribute( name, new BufferAttribute( arguments[ 1 ], arguments[ 2 ] ) );\n\n\t\t}\n\n\t\tif ( name === 'index' ) {\n\n\t\t\tconsole.warn( 'THREE.BufferGeometry.addAttribute: Use .setIndex() for index attribute.' );\n\t\t\tthis.setIndex( attribute );\n\n\t\t\treturn this;\n\n\t\t}\n\n\t\treturn this.setAttribute( name, attribute );\n\n\t},\n\taddDrawCall: function ( start, count, indexOffset ) {\n\n\t\tif ( indexOffset !== undefined ) {\n\n\t\t\tconsole.warn( 'THREE.BufferGeometry: .addDrawCall() no longer supports indexOffset.' );\n\n\t\t}\n\t\tconsole.warn( 'THREE.BufferGeometry: .addDrawCall() is now .addGroup().' );\n\t\tthis.addGroup( start, count );\n\n\t},\n\tclearDrawCalls: function () {\n\n\t\tconsole.warn( 'THREE.BufferGeometry: .clearDrawCalls() is now .clearGroups().' );\n\t\tthis.clearGroups();\n\n\t},\n\tcomputeTangents: function () {\n\n\t\tconsole.warn( 'THREE.BufferGeometry: .computeTangents() has been removed.' );\n\n\t},\n\tcomputeOffsets: function () {\n\n\t\tconsole.warn( 'THREE.BufferGeometry: .computeOffsets() has been removed.' );\n\n\t},\n\tremoveAttribute: function ( name ) {\n\n\t\tconsole.warn( 'THREE.BufferGeometry: .removeAttribute() has been renamed to .deleteAttribute().' );\n\n\t\treturn this.deleteAttribute( name );\n\n\t},\n\tapplyMatrix: function ( matrix ) {\n\n\t\tconsole.warn( 'THREE.BufferGeometry: .applyMatrix() has been renamed to .applyMatrix4().' );\n\t\treturn this.applyMatrix4( matrix );\n\n\t}\n\n} );\n\nObject.defineProperties( BufferGeometry.prototype, {\n\n\tdrawcalls: {\n\t\tget: function () {\n\n\t\t\tconsole.error( 'THREE.BufferGeometry: .drawcalls has been renamed to .groups.' );\n\t\t\treturn this.groups;\n\n\t\t}\n\t},\n\toffsets: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.BufferGeometry: .offsets has been renamed to .groups.' );\n\t\t\treturn this.groups;\n\n\t\t}\n\t}\n\n} );\n\nObject.defineProperties( Raycaster.prototype, {\n\n\tlinePrecision: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.Raycaster: .linePrecision has been deprecated. Use .params.Line.threshold instead.' );\n\t\t\treturn this.params.Line.threshold;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.Raycaster: .linePrecision has been deprecated. Use .params.Line.threshold instead.' );\n\t\t\tthis.params.Line.threshold = value;\n\n\t\t}\n\t}\n\n} );\n\nObject.defineProperties( InterleavedBuffer.prototype, {\n\n\tdynamic: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.InterleavedBuffer: .length has been deprecated. Use .usage instead.' );\n\t\t\treturn this.usage === DynamicDrawUsage;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.InterleavedBuffer: .length has been deprecated. Use .usage instead.' );\n\t\t\tthis.setUsage( value );\n\n\t\t}\n\t}\n\n} );\n\nObject.assign( InterleavedBuffer.prototype, {\n\tsetDynamic: function ( value ) {\n\n\t\tconsole.warn( 'THREE.InterleavedBuffer: .setDynamic() has been deprecated. Use .setUsage() instead.' );\n\t\tthis.setUsage( value === true ? DynamicDrawUsage : StaticDrawUsage );\n\t\treturn this;\n\n\t},\n\tsetArray: function ( /* array */ ) {\n\n\t\tconsole.error( 'THREE.InterleavedBuffer: .setArray has been removed. Use BufferGeometry .setAttribute to replace/resize attribute buffers' );\n\n\t}\n} );\n\n//\n\nObject.assign( ExtrudeBufferGeometry.prototype, {\n\n\tgetArrays: function () {\n\n\t\tconsole.error( 'THREE.ExtrudeBufferGeometry: .getArrays() has been removed.' );\n\n\t},\n\n\taddShapeList: function () {\n\n\t\tconsole.error( 'THREE.ExtrudeBufferGeometry: .addShapeList() has been removed.' );\n\n\t},\n\n\taddShape: function () {\n\n\t\tconsole.error( 'THREE.ExtrudeBufferGeometry: .addShape() has been removed.' );\n\n\t}\n\n} );\n\n//\n\nObject.defineProperties( Uniform.prototype, {\n\n\tdynamic: {\n\t\tset: function () {\n\n\t\t\tconsole.warn( 'THREE.Uniform: .dynamic has been removed. Use object.onBeforeRender() instead.' );\n\n\t\t}\n\t},\n\tonUpdate: {\n\t\tvalue: function () {\n\n\t\t\tconsole.warn( 'THREE.Uniform: .onUpdate() has been removed. Use object.onBeforeRender() instead.' );\n\t\t\treturn this;\n\n\t\t}\n\t}\n\n} );\n\n//\n\nObject.defineProperties( Material.prototype, {\n\n\twrapAround: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.Material: .wrapAround has been removed.' );\n\n\t\t},\n\t\tset: function () {\n\n\t\t\tconsole.warn( 'THREE.Material: .wrapAround has been removed.' );\n\n\t\t}\n\t},\n\n\toverdraw: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.Material: .overdraw has been removed.' );\n\n\t\t},\n\t\tset: function () {\n\n\t\t\tconsole.warn( 'THREE.Material: .overdraw has been removed.' );\n\n\t\t}\n\t},\n\n\twrapRGB: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.Material: .wrapRGB has been removed.' );\n\t\t\treturn new Color();\n\n\t\t}\n\t},\n\n\tshading: {\n\t\tget: function () {\n\n\t\t\tconsole.error( 'THREE.' + this.type + ': .shading has been removed. Use the boolean .flatShading instead.' );\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.' + this.type + ': .shading has been removed. Use the boolean .flatShading instead.' );\n\t\t\tthis.flatShading = ( value === FlatShading );\n\n\t\t}\n\t},\n\n\tstencilMask: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.' + this.type + ': .stencilMask has been removed. Use .stencilFuncMask instead.' );\n\t\t\treturn this.stencilFuncMask;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.' + this.type + ': .stencilMask has been removed. Use .stencilFuncMask instead.' );\n\t\t\tthis.stencilFuncMask = value;\n\n\t\t}\n\t}\n\n} );\n\nObject.defineProperties( MeshPhongMaterial.prototype, {\n\n\tmetal: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.MeshPhongMaterial: .metal has been removed. Use THREE.MeshStandardMaterial instead.' );\n\t\t\treturn false;\n\n\t\t},\n\t\tset: function () {\n\n\t\t\tconsole.warn( 'THREE.MeshPhongMaterial: .metal has been removed. Use THREE.MeshStandardMaterial instead' );\n\n\t\t}\n\t}\n\n} );\n\nObject.defineProperties( ShaderMaterial.prototype, {\n\n\tderivatives: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.ShaderMaterial: .derivatives has been moved to .extensions.derivatives.' );\n\t\t\treturn this.extensions.derivatives;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE. ShaderMaterial: .derivatives has been moved to .extensions.derivatives.' );\n\t\t\tthis.extensions.derivatives = value;\n\n\t\t}\n\t}\n\n} );\n\n//\n\nObject.assign( WebGLRenderer.prototype, {\n\n\tclearTarget: function ( renderTarget, color, depth, stencil ) {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .clearTarget() has been deprecated. Use .setRenderTarget() and .clear() instead.' );\n\t\tthis.setRenderTarget( renderTarget );\n\t\tthis.clear( color, depth, stencil );\n\n\t},\n\tanimate: function ( callback ) {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .animate() is now .setAnimationLoop().' );\n\t\tthis.setAnimationLoop( callback );\n\n\t},\n\tgetCurrentRenderTarget: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .getCurrentRenderTarget() is now .getRenderTarget().' );\n\t\treturn this.getRenderTarget();\n\n\t},\n\tgetMaxAnisotropy: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .getMaxAnisotropy() is now .capabilities.getMaxAnisotropy().' );\n\t\treturn this.capabilities.getMaxAnisotropy();\n\n\t},\n\tgetPrecision: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .getPrecision() is now .capabilities.precision.' );\n\t\treturn this.capabilities.precision;\n\n\t},\n\tresetGLState: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .resetGLState() is now .state.reset().' );\n\t\treturn this.state.reset();\n\n\t},\n\tsupportsFloatTextures: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .supportsFloatTextures() is now .extensions.get( \\'OES_texture_float\\' ).' );\n\t\treturn this.extensions.get( 'OES_texture_float' );\n\n\t},\n\tsupportsHalfFloatTextures: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .supportsHalfFloatTextures() is now .extensions.get( \\'OES_texture_half_float\\' ).' );\n\t\treturn this.extensions.get( 'OES_texture_half_float' );\n\n\t},\n\tsupportsStandardDerivatives: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .supportsStandardDerivatives() is now .extensions.get( \\'OES_standard_derivatives\\' ).' );\n\t\treturn this.extensions.get( 'OES_standard_derivatives' );\n\n\t},\n\tsupportsCompressedTextureS3TC: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .supportsCompressedTextureS3TC() is now .extensions.get( \\'WEBGL_compressed_texture_s3tc\\' ).' );\n\t\treturn this.extensions.get( 'WEBGL_compressed_texture_s3tc' );\n\n\t},\n\tsupportsCompressedTexturePVRTC: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .supportsCompressedTexturePVRTC() is now .extensions.get( \\'WEBGL_compressed_texture_pvrtc\\' ).' );\n\t\treturn this.extensions.get( 'WEBGL_compressed_texture_pvrtc' );\n\n\t},\n\tsupportsBlendMinMax: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .supportsBlendMinMax() is now .extensions.get( \\'EXT_blend_minmax\\' ).' );\n\t\treturn this.extensions.get( 'EXT_blend_minmax' );\n\n\t},\n\tsupportsVertexTextures: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .supportsVertexTextures() is now .capabilities.vertexTextures.' );\n\t\treturn this.capabilities.vertexTextures;\n\n\t},\n\tsupportsInstancedArrays: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .supportsInstancedArrays() is now .extensions.get( \\'ANGLE_instanced_arrays\\' ).' );\n\t\treturn this.extensions.get( 'ANGLE_instanced_arrays' );\n\n\t},\n\tenableScissorTest: function ( boolean ) {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .enableScissorTest() is now .setScissorTest().' );\n\t\tthis.setScissorTest( boolean );\n\n\t},\n\tinitMaterial: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .initMaterial() has been removed.' );\n\n\t},\n\taddPrePlugin: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .addPrePlugin() has been removed.' );\n\n\t},\n\taddPostPlugin: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .addPostPlugin() has been removed.' );\n\n\t},\n\tupdateShadowMap: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .updateShadowMap() has been removed.' );\n\n\t},\n\tsetFaceCulling: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .setFaceCulling() has been removed.' );\n\n\t},\n\tallocTextureUnit: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .allocTextureUnit() has been removed.' );\n\n\t},\n\tsetTexture: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .setTexture() has been removed.' );\n\n\t},\n\tsetTexture2D: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .setTexture2D() has been removed.' );\n\n\t},\n\tsetTextureCube: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .setTextureCube() has been removed.' );\n\n\t},\n\tgetActiveMipMapLevel: function () {\n\n\t\tconsole.warn( 'THREE.WebGLRenderer: .getActiveMipMapLevel() is now .getActiveMipmapLevel().' );\n\t\treturn this.getActiveMipmapLevel();\n\n\t}\n\n} );\n\nObject.defineProperties( WebGLRenderer.prototype, {\n\n\tshadowMapEnabled: {\n\t\tget: function () {\n\n\t\t\treturn this.shadowMap.enabled;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: .shadowMapEnabled is now .shadowMap.enabled.' );\n\t\t\tthis.shadowMap.enabled = value;\n\n\t\t}\n\t},\n\tshadowMapType: {\n\t\tget: function () {\n\n\t\t\treturn this.shadowMap.type;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: .shadowMapType is now .shadowMap.type.' );\n\t\t\tthis.shadowMap.type = value;\n\n\t\t}\n\t},\n\tshadowMapCullFace: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: .shadowMapCullFace has been removed. Set Material.shadowSide instead.' );\n\t\t\treturn undefined;\n\n\t\t},\n\t\tset: function ( /* value */ ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: .shadowMapCullFace has been removed. Set Material.shadowSide instead.' );\n\n\t\t}\n\t},\n\tcontext: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: .context has been removed. Use .getContext() instead.' );\n\t\t\treturn this.getContext();\n\n\t\t}\n\t},\n\tvr: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: .vr has been renamed to .xr' );\n\t\t\treturn this.xr;\n\n\t\t}\n\t},\n\tgammaInput: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: .gammaInput has been removed. Set the encoding for textures via Texture.encoding instead.' );\n\t\t\treturn false;\n\n\t\t},\n\t\tset: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: .gammaInput has been removed. Set the encoding for textures via Texture.encoding instead.' );\n\n\t\t}\n\t},\n\tgammaOutput: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: .gammaOutput has been removed. Set WebGLRenderer.outputEncoding instead.' );\n\t\t\treturn false;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: .gammaOutput has been removed. Set WebGLRenderer.outputEncoding instead.' );\n\t\t\tthis.outputEncoding = ( value === true ) ? sRGBEncoding : LinearEncoding;\n\n\t\t}\n\t}\n\n} );\n\nObject.defineProperties( WebGLShadowMap.prototype, {\n\n\tcullFace: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: .shadowMap.cullFace has been removed. Set Material.shadowSide instead.' );\n\t\t\treturn undefined;\n\n\t\t},\n\t\tset: function ( /* cullFace */ ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: .shadowMap.cullFace has been removed. Set Material.shadowSide instead.' );\n\n\t\t}\n\t},\n\trenderReverseSided: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: .shadowMap.renderReverseSided has been removed. Set Material.shadowSide instead.' );\n\t\t\treturn undefined;\n\n\t\t},\n\t\tset: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: .shadowMap.renderReverseSided has been removed. Set Material.shadowSide instead.' );\n\n\t\t}\n\t},\n\trenderSingleSided: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: .shadowMap.renderSingleSided has been removed. Set Material.shadowSide instead.' );\n\t\t\treturn undefined;\n\n\t\t},\n\t\tset: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderer: .shadowMap.renderSingleSided has been removed. Set Material.shadowSide instead.' );\n\n\t\t}\n\t}\n\n} );\n\n//\n\nObject.defineProperties( WebGLRenderTarget.prototype, {\n\n\twrapS: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .wrapS is now .texture.wrapS.' );\n\t\t\treturn this.texture.wrapS;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .wrapS is now .texture.wrapS.' );\n\t\t\tthis.texture.wrapS = value;\n\n\t\t}\n\t},\n\twrapT: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .wrapT is now .texture.wrapT.' );\n\t\t\treturn this.texture.wrapT;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .wrapT is now .texture.wrapT.' );\n\t\t\tthis.texture.wrapT = value;\n\n\t\t}\n\t},\n\tmagFilter: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .magFilter is now .texture.magFilter.' );\n\t\t\treturn this.texture.magFilter;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .magFilter is now .texture.magFilter.' );\n\t\t\tthis.texture.magFilter = value;\n\n\t\t}\n\t},\n\tminFilter: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .minFilter is now .texture.minFilter.' );\n\t\t\treturn this.texture.minFilter;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .minFilter is now .texture.minFilter.' );\n\t\t\tthis.texture.minFilter = value;\n\n\t\t}\n\t},\n\tanisotropy: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .anisotropy is now .texture.anisotropy.' );\n\t\t\treturn this.texture.anisotropy;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .anisotropy is now .texture.anisotropy.' );\n\t\t\tthis.texture.anisotropy = value;\n\n\t\t}\n\t},\n\toffset: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .offset is now .texture.offset.' );\n\t\t\treturn this.texture.offset;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .offset is now .texture.offset.' );\n\t\t\tthis.texture.offset = value;\n\n\t\t}\n\t},\n\trepeat: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .repeat is now .texture.repeat.' );\n\t\t\treturn this.texture.repeat;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .repeat is now .texture.repeat.' );\n\t\t\tthis.texture.repeat = value;\n\n\t\t}\n\t},\n\tformat: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .format is now .texture.format.' );\n\t\t\treturn this.texture.format;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .format is now .texture.format.' );\n\t\t\tthis.texture.format = value;\n\n\t\t}\n\t},\n\ttype: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .type is now .texture.type.' );\n\t\t\treturn this.texture.type;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .type is now .texture.type.' );\n\t\t\tthis.texture.type = value;\n\n\t\t}\n\t},\n\tgenerateMipmaps: {\n\t\tget: function () {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .generateMipmaps is now .texture.generateMipmaps.' );\n\t\t\treturn this.texture.generateMipmaps;\n\n\t\t},\n\t\tset: function ( value ) {\n\n\t\t\tconsole.warn( 'THREE.WebGLRenderTarget: .generateMipmaps is now .texture.generateMipmaps.' );\n\t\t\tthis.texture.generateMipmaps = value;\n\n\t\t}\n\t}\n\n} );\n\n//\n\nObject.defineProperties( Audio.prototype, {\n\n\tload: {\n\t\tvalue: function ( file ) {\n\n\t\t\tconsole.warn( 'THREE.Audio: .load has been deprecated. Use THREE.AudioLoader instead.' );\n\t\t\tvar scope = this;\n\t\t\tvar audioLoader = new AudioLoader();\n\t\t\taudioLoader.load( file, function ( buffer ) {\n\n\t\t\t\tscope.setBuffer( buffer );\n\n\t\t\t} );\n\t\t\treturn this;\n\n\t\t}\n\t},\n\tstartTime: {\n\t\tset: function () {\n\n\t\t\tconsole.warn( 'THREE.Audio: .startTime is now .play( delay ).' );\n\n\t\t}\n\t}\n\n} );\n\nAudioAnalyser.prototype.getData = function () {\n\n\tconsole.warn( 'THREE.AudioAnalyser: .getData() is now .getFrequencyData().' );\n\treturn this.getFrequencyData();\n\n};\n\n//\n\nCubeCamera.prototype.updateCubeMap = function ( renderer, scene ) {\n\n\tconsole.warn( 'THREE.CubeCamera: .updateCubeMap() is now .update().' );\n\treturn this.update( renderer, scene );\n\n};\n\nImageUtils.crossOrigin = undefined;\n\nImageUtils.loadTexture = function ( url, mapping, onLoad, onError ) {\n\n\tconsole.warn( 'THREE.ImageUtils.loadTexture has been deprecated. Use THREE.TextureLoader() instead.' );\n\n\tvar loader = new TextureLoader();\n\tloader.setCrossOrigin( this.crossOrigin );\n\n\tvar texture = loader.load( url, onLoad, undefined, onError );\n\n\tif ( mapping ) texture.mapping = mapping;\n\n\treturn texture;\n\n};\n\nImageUtils.loadTextureCube = function ( urls, mapping, onLoad, onError ) {\n\n\tconsole.warn( 'THREE.ImageUtils.loadTextureCube has been deprecated. Use THREE.CubeTextureLoader() instead.' );\n\n\tvar loader = new CubeTextureLoader();\n\tloader.setCrossOrigin( this.crossOrigin );\n\n\tvar texture = loader.load( urls, onLoad, undefined, onError );\n\n\tif ( mapping ) texture.mapping = mapping;\n\n\treturn texture;\n\n};\n\nImageUtils.loadCompressedTexture = function () {\n\n\tconsole.error( 'THREE.ImageUtils.loadCompressedTexture has been removed. Use THREE.DDSLoader instead.' );\n\n};\n\nImageUtils.loadCompressedTextureCube = function () {\n\n\tconsole.error( 'THREE.ImageUtils.loadCompressedTextureCube has been removed. Use THREE.DDSLoader instead.' );\n\n};\n\nif ( typeof __THREE_DEVTOOLS__ !== 'undefined' ) {\n\n\t/* eslint-disable no-undef */\n\t__THREE_DEVTOOLS__.dispatchEvent( new CustomEvent( 'register', { detail: {\n\t\trevision: REVISION,\n\t} } ) );\n\t/* eslint-enable no-undef */\n\n}\n\n/**\n * @author qiao / https://github.com/qiao\n * @author mrdoob / http://mrdoob.com\n * @author alteredq / http://alteredqualia.com/\n * @author WestLangley / http://github.com/WestLangley\n * @author erich666 / http://erichaines.com\n * @author ScieCode / http://github.com/sciecode\n */\n// Unlike TrackballControls, it maintains the \"up\" direction object.up (+Y by default).\n//\n//    Orbit - left mouse / touch: one-finger move\n//    Zoom - middle mouse, or mousewheel / touch: two-finger spread or squish\n//    Pan - right mouse, or left mouse + ctrl/meta/shiftKey, or arrow keys / touch: two-finger move\n\nvar OrbitControls = function OrbitControls(object, domElement) {\n  if (domElement === undefined) console.warn('THREE.OrbitControls: The second parameter \"domElement\" is now mandatory.');\n  if (domElement === document) console.error('THREE.OrbitControls: \"document\" should not be used as the target \"domElement\". Please use \"renderer.domElement\" instead.');\n  this.object = object;\n  this.domElement = domElement; // Set to false to disable this control\n\n  this.enabled = true; // \"target\" sets the location of focus, where the object orbits around\n\n  this.target = new Vector3(); // How far you can dolly in and out ( PerspectiveCamera only )\n\n  this.currentDistance = 1;\n  this.minDistance = -700;\n  this.maxDistance = 200; // How far you can zoom in and out ( OrthographicCamera only )\n\n  this.minZoom = 0;\n  this.maxZoom = Infinity; // How far you can orbit vertically, upper and lower limits.\n  // Range is 0 to Math.PI radians.\n\n  this.minPolarAngle = 0; // radians\n\n  this.maxPolarAngle = Math.PI; // radians\n  // How far you can orbit horizontally, upper and lower limits.\n  // If set, must be a sub-interval of the interval [ - Math.PI, Math.PI ].\n\n  this.minAzimuthAngle = -Infinity; // radians\n\n  this.maxAzimuthAngle = Infinity; // radians\n  // Set to true to enable damping (inertia)\n  // If damping is enabled, you must call controls.update() in your animation loop\n\n  this.enableDamping = false;\n  this.dampingFactor = 0.05; // This option actually enables dollying in and out; left as \"zoom\" for backwards compatibility.\n  // Set to false to disable zooming\n\n  this.enableZoom = true;\n  this.zoomSpeed = 1.0; // Set to false to disable rotating\n\n  this.enableRotate = true;\n  this.rotateSpeed = 1.0; // Set to false to disable panning\n\n  this.enablePan = true;\n  this.panSpeed = 1.0;\n  this.screenSpacePanning = false; // if true, pan in screen-space\n\n  this.keyPanSpeed = 7.0; // pixels moved per arrow key push\n  // Set to true to automatically rotate around the target\n  // If auto-rotate is enabled, you must call controls.update() in your animation loop\n\n  this.autoRotate = false;\n  this.autoRotateSpeed = 2.0; // 30 seconds per round when fps is 60\n  // Set to false to disable use of the keys\n\n  this.enableKeys = true; // The four arrow keys\n\n  this.keys = {\n    LEFT: 37,\n    UP: 38,\n    RIGHT: 39,\n    BOTTOM: 40\n  }; // Mouse buttons\n\n  this.mouseButtons = {\n    LEFT: MOUSE.ROTATE,\n    MIDDLE: MOUSE.DOLLY,\n    RIGHT: MOUSE.PAN\n  }; // Touch fingers\n\n  this.touches = {\n    ONE: TOUCH.ROTATE,\n    TWO: TOUCH.DOLLY_PAN\n  }; // for reset\n\n  this.target0 = this.target.clone();\n  this.position0 = this.object.position.clone();\n  this.zoom0 = this.object.zoom; //\n  // public methods\n  //\n\n  this.getPolarAngle = function () {\n    return spherical.phi;\n  };\n\n  this.getAzimuthalAngle = function () {\n    return spherical.theta;\n  };\n\n  this.saveState = function () {\n    scope.target0.copy(scope.target);\n    scope.position0.copy(scope.object.position);\n    scope.zoom0 = scope.object.zoom;\n  };\n\n  this.reset = function () {\n    scope.target.copy(scope.target0);\n    scope.object.position.copy(scope.position0);\n    scope.object.zoom = scope.zoom0;\n    scope.object.updateProjectionMatrix();\n    scope.dispatchEvent(changeEvent);\n    scope.update();\n    state = STATE.NONE;\n  }; // this method is exposed, but perhaps it would be better if we can make it private...\n\n\n  this.update = function () {\n    var offset = new Vector3(); // so camera.up is the orbit axis\n\n    var quat = new Quaternion().setFromUnitVectors(object.up, new Vector3(0, 1, 0));\n    var quatInverse = quat.clone().inverse();\n    var lastPosition = new Vector3();\n    var lastQuaternion = new Quaternion();\n    return function update() {\n      var position = scope.object.position;\n      offset.copy(position).sub(scope.target); // rotate offset to \"y-axis-is-up\" space\n\n      offset.applyQuaternion(quat); // angle from z-axis around y-axis\n\n      spherical.setFromVector3(offset);\n\n      if (scope.autoRotate && state === STATE.NONE) {\n        rotateLeft(getAutoRotationAngle());\n      }\n\n      if (scope.enableDamping) {\n        spherical.theta += sphericalDelta.theta * scope.dampingFactor;\n        spherical.phi += sphericalDelta.phi * scope.dampingFactor;\n      } else {\n        spherical.theta += sphericalDelta.theta;\n        spherical.phi += sphericalDelta.phi;\n      } // restrict theta to be between desired limits\n\n\n      spherical.theta = Math.max(scope.minAzimuthAngle, Math.min(scope.maxAzimuthAngle, spherical.theta)); // restrict phi to be between desired limits\n\n      spherical.phi = Math.max(scope.minPolarAngle, Math.min(scope.maxPolarAngle, spherical.phi));\n      spherical.makeSafe();\n\n      if (scope.currentDistance >= 0) {\n        var newRad = scope.currentDistance;\n\n        if (spherical.radius != newRad) {\n          spherical.radius = scope.currentDistance;\n          zoomChanged = true;\n        }\n      } else // simulate very close zoom by changing fov\n        {\n          var newFov = 75 + scope.currentDistance * 0.06;\n\n          if (scope.object.fov != newFov) {\n            scope.object.fov = newFov;\n            scope.object.updateProjectionMatrix();\n            zoomChanged = true;\n          }\n        } // restrict radius to be between desired limits\n\n\n      spherical.radius = Math.max(scope.minDistance, Math.min(scope.maxDistance, spherical.radius)); // move target to panned location\n\n      if (scope.enableDamping === true) {\n        scope.target.addScaledVector(panOffset, scope.dampingFactor);\n      } else {\n        scope.target.add(panOffset);\n      }\n\n      offset.setFromSpherical(spherical); // rotate offset back to \"camera-up-vector-is-up\" space\n\n      offset.applyQuaternion(quatInverse);\n      position.copy(scope.target).add(offset);\n      scope.object.lookAt(scope.target);\n\n      if (scope.enableDamping === true) {\n        sphericalDelta.theta *= 1 - scope.dampingFactor;\n        sphericalDelta.phi *= 1 - scope.dampingFactor;\n        panOffset.multiplyScalar(1 - scope.dampingFactor);\n      } else {\n        sphericalDelta.set(0, 0, 0);\n        panOffset.set(0, 0, 0);\n      } // update condition is:\n      // min(camera displacement, camera rotation in radians)^2 > EPS\n      // using small-angle approximation cos(x/2) = 1 - x^2 / 8\n\n\n      if (zoomChanged || lastPosition.distanceToSquared(scope.object.position) > EPS || 8 * (1 - lastQuaternion.dot(scope.object.quaternion)) > EPS) {\n        if (zoomChanged) scope.dispatchEvent(zoomEvent);else scope.dispatchEvent(changeEvent);\n        lastPosition.copy(scope.object.position);\n        lastQuaternion.copy(scope.object.quaternion);\n        zoomChanged = false;\n        return true;\n      }\n\n      return false;\n    };\n  }();\n\n  this.dispose = function () {\n    scope.domElement.removeEventListener('contextmenu', onContextMenu, false);\n    scope.domElement.removeEventListener('mousedown', onMouseDown, false);\n    scope.domElement.removeEventListener('wheel', onMouseWheel, false);\n    scope.domElement.removeEventListener('touchstart', onTouchStart, false);\n    scope.domElement.removeEventListener('touchend', onTouchEnd, false);\n    scope.domElement.removeEventListener('touchmove', onTouchMove, false);\n    document.removeEventListener('mousemove', onMouseMove, false);\n    document.removeEventListener('mouseup', onMouseUp, false);\n    scope.domElement.removeEventListener('keydown', onKeyDown, false); //scope.dispatchEvent( { type: 'dispose' } ); // should this be added here?\n  }; //\n  // internals\n  //\n\n\n  var scope = this;\n  var changeEvent = {\n    type: 'change'\n  };\n  var zoomEvent = {\n    type: 'zoom'\n  };\n  var startEvent = {\n    type: 'start'\n  };\n  var endEvent = {\n    type: 'end'\n  };\n  var STATE = {\n    NONE: -1,\n    ROTATE: 0,\n    DOLLY: 1,\n    PAN: 2,\n    TOUCH_ROTATE: 3,\n    TOUCH_PAN: 4,\n    TOUCH_DOLLY_PAN: 5,\n    TOUCH_DOLLY_ROTATE: 6\n  };\n  var state = STATE.NONE;\n  var EPS = 0.000001; // current position in spherical coordinates\n\n  var spherical = new Spherical();\n  var sphericalDelta = new Spherical();\n  var panOffset = new Vector3();\n  var zoomChanged = false;\n  var rotateStart = new Vector2();\n  var rotateEnd = new Vector2();\n  var rotateDelta = new Vector2();\n  var panStart = new Vector2();\n  var panEnd = new Vector2();\n  var panDelta = new Vector2();\n  var dollyStart = new Vector2();\n  var dollyEnd = new Vector2();\n  var dollyDelta = new Vector2();\n\n  function getAutoRotationAngle() {\n    return 2 * Math.PI / 60 / 60 * scope.autoRotateSpeed;\n  }\n\n  function getZoomScale() {\n    return Math.pow(0.95, scope.zoomSpeed);\n  }\n\n  function rotateLeft(angle) {\n    sphericalDelta.theta -= angle;\n  }\n\n  function rotateUp(angle) {\n    sphericalDelta.phi -= angle;\n  }\n\n  var panLeft = function () {\n    var v = new Vector3();\n    return function panLeft(distance, objectMatrix) {\n      v.setFromMatrixColumn(objectMatrix, 0); // get X column of objectMatrix\n\n      v.multiplyScalar(-distance);\n      panOffset.add(v);\n    };\n  }();\n\n  var panUp = function () {\n    var v = new Vector3();\n    return function panUp(distance, objectMatrix) {\n      if (scope.screenSpacePanning === true) {\n        v.setFromMatrixColumn(objectMatrix, 1);\n      } else {\n        v.setFromMatrixColumn(objectMatrix, 0);\n        v.crossVectors(scope.object.up, v);\n      }\n\n      v.multiplyScalar(distance);\n      panOffset.add(v);\n    };\n  }(); // deltaX and deltaY are in pixels; right and down are positive\n\n\n  var pan = function () {\n    var offset = new Vector3();\n    return function pan(deltaX, deltaY) {\n      var element = scope.domElement;\n\n      if (scope.object.isPerspectiveCamera) {\n        // perspective\n        var position = scope.object.position;\n        offset.copy(position).sub(scope.target);\n        var targetDistance = offset.length(); // half of the fov is center to top of screen\n\n        targetDistance *= Math.tan(scope.object.fov / 2 * Math.PI / 180.0); // we use only clientHeight here so aspect ratio does not distort speed\n\n        panLeft(2 * deltaX * targetDistance / element.clientHeight, scope.object.matrix);\n        panUp(2 * deltaY * targetDistance / element.clientHeight, scope.object.matrix);\n      } else if (scope.object.isOrthographicCamera) {\n        // orthographic\n        panLeft(deltaX * (scope.object.right - scope.object.left) / scope.object.zoom / element.clientWidth, scope.object.matrix);\n        panUp(deltaY * (scope.object.top - scope.object.bottom) / scope.object.zoom / element.clientHeight, scope.object.matrix);\n      } else {\n        // camera neither orthographic nor perspective\n        console.warn('WARNING: OrbitControls.js encountered an unknown camera type - pan disabled.');\n        scope.enablePan = false;\n      }\n    };\n  }();\n\n  function dollyIn(dollyScale) {\n    if (scope.object.isOrthographicCamera) {\n      scope.object.zoom = Math.max(scope.minZoom, Math.min(scope.maxZoom, scope.object.zoom * dollyScale));\n      scope.object.updateProjectionMatrix();\n      zoomChanged = true;\n    } else {\n      if (!scope.object.isPerspectiveCamera) {\n        // dolly for perspective camera not implemented\n        console.warn('WARNING: OrbitControls.js encountered an unknown camera type - dolly/zoom disabled.');\n        scope.enableZoom = false;\n      }\n    }\n  }\n\n  function dollyOut(dollyScale) {\n    if (scope.object.isOrthographicCamera) {\n      scope.object.zoom = Math.max(scope.minZoom, Math.min(scope.maxZoom, scope.object.zoom / dollyScale));\n      scope.object.updateProjectionMatrix();\n      zoomChanged = true;\n    } else {\n      if (!scope.object.isPerspectiveCamera) {\n        // dolly for perspective camera not implemented\n        console.warn('WARNING: OrbitControls.js encountered an unknown camera type - dolly/zoom disabled.');\n        scope.enableZoom = false;\n      }\n    }\n  } //\n  // event callbacks - update the object state\n  //\n\n\n  function handleMouseDownRotate(event) {\n    rotateStart.set(event.clientX, event.clientY);\n  }\n\n  function handleMouseDownDolly(event) {\n    dollyStart.set(event.clientX, event.clientY);\n  }\n\n  function handleMouseDownPan(event) {\n    panStart.set(event.clientX, event.clientY);\n  }\n\n  function handleMouseMoveRotate(event) {\n    rotateEnd.set(event.clientX, event.clientY);\n    rotateDelta.subVectors(rotateEnd, rotateStart).multiplyScalar(scope.rotateSpeed);\n    var element = scope.domElement;\n    rotateLeft(2 * Math.PI * rotateDelta.x / element.clientHeight); // yes, height\n\n    rotateUp(2 * Math.PI * rotateDelta.y / element.clientHeight);\n    rotateStart.copy(rotateEnd);\n    scope.update();\n  }\n\n  function handleMouseMoveDolly(event) {\n    dollyEnd.set(event.clientX, event.clientY);\n    dollyDelta.subVectors(dollyEnd, dollyStart);\n\n    if (dollyDelta.y > 0) {\n      dollyIn(getZoomScale());\n    } else if (dollyDelta.y < 0) {\n      dollyOut(getZoomScale());\n    }\n\n    dollyStart.copy(dollyEnd);\n    scope.update();\n  }\n\n  function handleMouseMovePan(event) {\n    panEnd.set(event.clientX, event.clientY);\n    panDelta.subVectors(panEnd, panStart).multiplyScalar(scope.panSpeed);\n    pan(panDelta.x, panDelta.y);\n    panStart.copy(panEnd);\n    scope.update();\n  }\n\n  function handleMouseWheel(event) {\n    scope.currentDistance += Math.sign(event.deltaY) * 15; // make sure scope.currentDistance never gets 0!\n\n    scope.currentDistance = Math.clamp(scope.currentDistance != 0 ? scope.currentDistance : Math.sign(event.deltaY) + 0.1, scope.minDistance, scope.maxDistance);\n\n    if (event.deltaY < 0) {\n      dollyOut(getZoomScale());\n    } else if (event.deltaY > 0) {\n      dollyIn(getZoomScale());\n    }\n\n    scope.update();\n  }\n\n  function handleKeyDown(event) {\n    var needsUpdate = false;\n\n    switch (event.keyCode) {\n      case scope.keys.UP:\n        pan(0, scope.keyPanSpeed);\n        needsUpdate = true;\n        break;\n\n      case scope.keys.BOTTOM:\n        pan(0, -scope.keyPanSpeed);\n        needsUpdate = true;\n        break;\n\n      case scope.keys.LEFT:\n        pan(scope.keyPanSpeed, 0);\n        needsUpdate = true;\n        break;\n\n      case scope.keys.RIGHT:\n        pan(-scope.keyPanSpeed, 0);\n        needsUpdate = true;\n        break;\n    }\n\n    if (needsUpdate) {\n      // prevent the browser from scrolling on cursor keys\n      event.preventDefault();\n      scope.update();\n    }\n  }\n\n  function handleTouchStartRotate(event) {\n    if (event.touches.length == 1) {\n      rotateStart.set(event.touches[0].pageX, event.touches[0].pageY);\n    } else {\n      var x = 0.5 * (event.touches[0].pageX + event.touches[1].pageX);\n      var y = 0.5 * (event.touches[0].pageY + event.touches[1].pageY);\n      rotateStart.set(x, y);\n    }\n  }\n\n  function handleTouchStartPan(event) {\n    if (event.touches.length == 1) {\n      panStart.set(event.touches[0].pageX, event.touches[0].pageY);\n    } else {\n      var x = 0.5 * (event.touches[0].pageX + event.touches[1].pageX);\n      var y = 0.5 * (event.touches[0].pageY + event.touches[1].pageY);\n      panStart.set(x, y);\n    }\n  }\n\n  function handleTouchStartDolly(event) {\n    var dx = event.touches[0].pageX - event.touches[1].pageX;\n    var dy = event.touches[0].pageY - event.touches[1].pageY;\n    var distance = Math.sqrt(dx * dx + dy * dy);\n    dollyStart.set(0, distance);\n  }\n\n  function handleTouchStartDollyPan(event) {\n    if (scope.enableZoom) handleTouchStartDolly(event);\n    if (scope.enablePan) handleTouchStartPan(event);\n  }\n\n  function handleTouchStartDollyRotate(event) {\n    if (scope.enableZoom) handleTouchStartDolly(event);\n    if (scope.enableRotate) handleTouchStartRotate(event);\n  }\n\n  function handleTouchMoveRotate(event) {\n    if (event.touches.length == 1) {\n      rotateEnd.set(event.touches[0].pageX, event.touches[0].pageY);\n    } else {\n      var x = 0.5 * (event.touches[0].pageX + event.touches[1].pageX);\n      var y = 0.5 * (event.touches[0].pageY + event.touches[1].pageY);\n      rotateEnd.set(x, y);\n    }\n\n    rotateDelta.subVectors(rotateEnd, rotateStart).multiplyScalar(scope.rotateSpeed);\n    var element = scope.domElement;\n    rotateLeft(2 * Math.PI * rotateDelta.x / element.clientHeight); // yes, height\n\n    rotateUp(2 * Math.PI * rotateDelta.y / element.clientHeight);\n    rotateStart.copy(rotateEnd);\n  }\n\n  function handleTouchMovePan(event) {\n    if (event.touches.length == 1) {\n      panEnd.set(event.touches[0].pageX, event.touches[0].pageY);\n    } else {\n      var x = 0.5 * (event.touches[0].pageX + event.touches[1].pageX);\n      var y = 0.5 * (event.touches[0].pageY + event.touches[1].pageY);\n      panEnd.set(x, y);\n    }\n\n    panDelta.subVectors(panEnd, panStart).multiplyScalar(scope.panSpeed);\n    pan(panDelta.x, panDelta.y);\n    panStart.copy(panEnd);\n  }\n\n  function handleTouchMoveDolly(event) {\n    var dx = event.touches[0].pageX - event.touches[1].pageX;\n    var dy = event.touches[0].pageY - event.touches[1].pageY;\n    var distance = Math.sqrt(dx * dx + dy * dy);\n    dollyEnd.set(0, distance);\n    dollyDelta.set(0, Math.pow(dollyEnd.y / dollyStart.y, scope.zoomSpeed));\n    dollyIn(dollyDelta.y);\n    dollyStart.copy(dollyEnd);\n  }\n\n  function handleTouchMoveDollyPan(event) {\n    if (scope.enableZoom) handleTouchMoveDolly(event);\n    if (scope.enablePan) handleTouchMovePan(event);\n  }\n\n  function handleTouchMoveDollyRotate(event) {\n    if (scope.enableZoom) handleTouchMoveDolly(event);\n    if (scope.enableRotate) handleTouchMoveRotate(event);\n  }\n  // event handlers - FSM: listen for events and reset state\n  //\n\n\n  function onMouseDown(event) {\n    if (scope.enabled === false) return; // Prevent the browser from scrolling.\n\n    event.preventDefault(); // Manually set the focus since calling preventDefault above\n    // prevents the browser from setting it automatically.\n\n    scope.domElement.focus ? scope.domElement.focus() : window.focus();\n    var mouseAction;\n\n    switch (event.button) {\n      case 0:\n        mouseAction = scope.mouseButtons.LEFT;\n        break;\n\n      case 1:\n        mouseAction = scope.mouseButtons.MIDDLE;\n        break;\n\n      case 2:\n        mouseAction = scope.mouseButtons.RIGHT;\n        break;\n\n      default:\n        mouseAction = -1;\n    }\n\n    switch (mouseAction) {\n      case MOUSE.DOLLY:\n        if (scope.enableZoom === false) return;\n        handleMouseDownDolly(event);\n        state = STATE.DOLLY;\n        break;\n\n      case MOUSE.ROTATE:\n        if (event.ctrlKey || event.metaKey || event.shiftKey) {\n          if (scope.enablePan === false) return;\n          handleMouseDownPan(event);\n          state = STATE.PAN;\n        } else {\n          if (scope.enableRotate === false) return;\n          handleMouseDownRotate(event);\n          state = STATE.ROTATE;\n        }\n\n        break;\n\n      case MOUSE.PAN:\n        if (event.ctrlKey || event.metaKey || event.shiftKey) {\n          if (scope.enableRotate === false) return;\n          handleMouseDownRotate(event);\n          state = STATE.ROTATE;\n        } else {\n          if (scope.enablePan === false) return;\n          handleMouseDownPan(event);\n          state = STATE.PAN;\n        }\n\n        break;\n\n      default:\n        state = STATE.NONE;\n    }\n\n    if (state !== STATE.NONE) {\n      document.addEventListener('mousemove', onMouseMove, false);\n      document.addEventListener('mouseup', onMouseUp, false);\n      scope.dispatchEvent(startEvent);\n    }\n  }\n\n  function onMouseMove(event) {\n    if (scope.enabled === false) return;\n    event.preventDefault();\n\n    switch (state) {\n      case STATE.ROTATE:\n        if (scope.enableRotate === false) return;\n        handleMouseMoveRotate(event);\n        break;\n\n      case STATE.DOLLY:\n        if (scope.enableZoom === false) return;\n        handleMouseMoveDolly(event);\n        break;\n\n      case STATE.PAN:\n        if (scope.enablePan === false) return;\n        handleMouseMovePan(event);\n        break;\n    }\n  }\n\n  function onMouseUp(event) {\n    if (scope.enabled === false) return;\n    document.removeEventListener('mousemove', onMouseMove, false);\n    document.removeEventListener('mouseup', onMouseUp, false);\n    scope.dispatchEvent(endEvent);\n    state = STATE.NONE;\n  }\n\n  function onMouseWheel(event) {\n    if (scope.enabled === false || scope.enableZoom === false || state !== STATE.NONE && state !== STATE.ROTATE) return;\n    event.preventDefault();\n    event.stopPropagation();\n    scope.dispatchEvent(startEvent);\n    handleMouseWheel(event);\n    scope.dispatchEvent(endEvent);\n  }\n\n  function onKeyDown(event) {\n    if (scope.enabled === false || scope.enableKeys === false || scope.enablePan === false) return;\n    handleKeyDown(event);\n  }\n\n  function onTouchStart(event) {\n    if (scope.enabled === false) return;\n    event.preventDefault(); // prevent scrolling\n\n    switch (event.touches.length) {\n      case 1:\n        switch (scope.touches.ONE) {\n          case TOUCH.ROTATE:\n            if (scope.enableRotate === false) return;\n            handleTouchStartRotate(event);\n            state = STATE.TOUCH_ROTATE;\n            break;\n\n          case TOUCH.PAN:\n            if (scope.enablePan === false) return;\n            handleTouchStartPan(event);\n            state = STATE.TOUCH_PAN;\n            break;\n\n          default:\n            state = STATE.NONE;\n        }\n\n        break;\n\n      case 2:\n        switch (scope.touches.TWO) {\n          case TOUCH.DOLLY_PAN:\n            if (scope.enableZoom === false && scope.enablePan === false) return;\n            handleTouchStartDollyPan(event);\n            state = STATE.TOUCH_DOLLY_PAN;\n            break;\n\n          case TOUCH.DOLLY_ROTATE:\n            if (scope.enableZoom === false && scope.enableRotate === false) return;\n            handleTouchStartDollyRotate(event);\n            state = STATE.TOUCH_DOLLY_ROTATE;\n            break;\n\n          default:\n            state = STATE.NONE;\n        }\n\n        break;\n\n      default:\n        state = STATE.NONE;\n    }\n\n    if (state !== STATE.NONE) {\n      scope.dispatchEvent(startEvent);\n    }\n  }\n\n  function onTouchMove(event) {\n    if (scope.enabled === false) return;\n    event.preventDefault(); // prevent scrolling\n\n    event.stopPropagation();\n\n    switch (state) {\n      case STATE.TOUCH_ROTATE:\n        if (scope.enableRotate === false) return;\n        handleTouchMoveRotate(event);\n        scope.update();\n        break;\n\n      case STATE.TOUCH_PAN:\n        if (scope.enablePan === false) return;\n        handleTouchMovePan(event);\n        scope.update();\n        break;\n\n      case STATE.TOUCH_DOLLY_PAN:\n        if (scope.enableZoom === false && scope.enablePan === false) return;\n        handleTouchMoveDollyPan(event);\n        scope.update();\n        break;\n\n      case STATE.TOUCH_DOLLY_ROTATE:\n        if (scope.enableZoom === false && scope.enableRotate === false) return;\n        handleTouchMoveDollyRotate(event);\n        scope.update();\n        break;\n\n      default:\n        state = STATE.NONE;\n    }\n  }\n\n  function onTouchEnd(event) {\n    if (scope.enabled === false) return;\n    scope.dispatchEvent(endEvent);\n    state = STATE.NONE;\n  }\n\n  function onContextMenu(event) {\n    if (scope.enabled === false) return;\n    event.preventDefault();\n  } //\n\n\n  scope.domElement.addEventListener('contextmenu', onContextMenu, false);\n  scope.domElement.addEventListener('mousedown', onMouseDown, false);\n  scope.domElement.addEventListener('wheel', onMouseWheel, false);\n  scope.domElement.addEventListener('touchstart', onTouchStart, false);\n  scope.domElement.addEventListener('touchend', onTouchEnd, false);\n  scope.domElement.addEventListener('touchmove', onTouchMove, false);\n  scope.domElement.addEventListener('keydown', onKeyDown, false); // make sure element can receive keys.\n\n  if (scope.domElement.tabIndex === -1) {\n    scope.domElement.tabIndex = 0;\n  } // force an update at start\n\n\n  this.update();\n};\n\nOrbitControls.prototype = Object.create(EventDispatcher.prototype);\nOrbitControls.prototype.constructor = OrbitControls; // This set of controls performs orbiting, dollying (zooming), and panning.\n// Unlike TrackballControls, it maintains the \"up\" direction object.up (+Y by default).\n// This is very similar to OrbitControls, another set of touch behavior\n//\n//    Orbit - right mouse, or left mouse + ctrl/meta/shiftKey / touch: two-finger rotate\n//    Zoom - middle mouse, or mousewheel / touch: two-finger spread or squish\n//    Pan - left mouse, or arrow keys / touch: one-finger move\n\nvar MapControls = function MapControls(object, domElement) {\n  OrbitControls.call(this, object, domElement);\n  this.mouseButtons.LEFT = MOUSE.PAN;\n  this.mouseButtons.RIGHT = MOUSE.ROTATE;\n  this.touches.ONE = TOUCH.PAN;\n  this.touches.TWO = TOUCH.DOLLY_ROTATE;\n};\n\nMapControls.prototype = Object.create(EventDispatcher.prototype);\nMapControls.prototype.constructor = MapControls;\n\n/**\n * @author richt / http://richt.me\n * @author WestLangley / http://github.com/WestLangley\n *\n * W3C Device Orientation control (http://w3c.github.io/deviceorientation/spec-source-orientation.html)\n */\n\nvar DeviceOrientationControls = function DeviceOrientationControls(object) {\n  var scope = this;\n  this.object = object;\n  this.object.rotation.reorder('YXZ');\n  this.enabled = true;\n  this.deviceOrientation = {};\n  this.screenOrientation = 0;\n  this.alphaOffset = 0; // radians\n\n  var onDeviceOrientationChangeEvent = function onDeviceOrientationChangeEvent(event) {\n    scope.deviceOrientation = event;\n  };\n\n  var onScreenOrientationChangeEvent = function onScreenOrientationChangeEvent() {\n    scope.screenOrientation = window.orientation || 0;\n  }; // The angles alpha, beta and gamma form a set of intrinsic Tait-Bryan angles of type Z-X'-Y''\n\n\n  var setObjectQuaternion = function () {\n    var zee = new Vector3(0, 0, 1);\n    var euler = new Euler();\n    var q0 = new Quaternion();\n    var q1 = new Quaternion(-Math.sqrt(0.5), 0, 0, Math.sqrt(0.5)); // - PI/2 around the x-axis\n\n    return function (quaternion, alpha, beta, gamma, orient) {\n      euler.set(beta, alpha, -gamma, 'YXZ'); // 'ZXY' for the device, but 'YXZ' for us\n\n      quaternion.setFromEuler(euler); // orient the device\n\n      quaternion.multiply(q1); // camera looks out the back of the device, not the top\n\n      quaternion.multiply(q0.setFromAxisAngle(zee, -orient)); // adjust for screen orientation\n    };\n  }();\n\n  this.connect = function () {\n    onScreenOrientationChangeEvent(); // run once on load\n    // iOS 13+\n\n    if (window.DeviceOrientationEvent !== undefined && typeof window.DeviceOrientationEvent.requestPermission === 'function') {\n      window.DeviceOrientationEvent.requestPermission().then(function (response) {\n        if (response == 'granted') {\n          window.addEventListener('orientationchange', onScreenOrientationChangeEvent, false);\n          window.addEventListener('deviceorientation', onDeviceOrientationChangeEvent, false);\n        }\n      }).catch(function (error) {\n        console.error('THREE.DeviceOrientationControls: Unable to use DeviceOrientation API:', error);\n      });\n    } else {\n      window.addEventListener('orientationchange', onScreenOrientationChangeEvent, false);\n      window.addEventListener('deviceorientation', onDeviceOrientationChangeEvent, false);\n    }\n\n    scope.enabled = true;\n  };\n\n  this.disconnect = function () {\n    window.removeEventListener('orientationchange', onScreenOrientationChangeEvent, false);\n    window.removeEventListener('deviceorientation', onDeviceOrientationChangeEvent, false);\n    scope.enabled = false;\n  };\n\n  this.update = function () {\n    if (scope.enabled === false) return;\n    var device = scope.deviceOrientation;\n\n    if (device) {\n      var alpha = device.alpha ? MathUtils.degToRad(device.alpha) + scope.alphaOffset : 0; // Z\n\n      var beta = device.beta ? MathUtils.degToRad(device.beta) : 0; // X'\n\n      var gamma = device.gamma ? MathUtils.degToRad(device.gamma) : 0; // Y''\n\n      var orient = scope.screenOrientation ? MathUtils.degToRad(scope.screenOrientation) : 0; // O\n\n      setObjectQuaternion(scope.object.quaternion, alpha, beta, gamma, orient);\n    }\n  };\n\n  this.dispose = function () {\n    scope.disconnect();\n  };\n\n  this.connect();\n};\n\n/**\r\n * Convert a quaternion to an angle\r\n *\r\n * Taken from https://stackoverflow.com/a/35448946\r\n * Thanks P. Ellul\r\n */\n\nfunction Quat2Angle(x, y, z, w) {\n  var test = x * y + z * w; // singularity at north pole\n\n  if (test > 0.499) {\n    var _yaw = 2 * Math.atan2(x, w);\n\n    var _pitch = Math.PI / 2;\n\n    var _roll = 0;\n    return new Vector3(_pitch, _roll, _yaw);\n  } // singularity at south pole\n\n\n  if (test < -0.499) {\n    var _yaw2 = -2 * Math.atan2(x, w);\n\n    var _pitch2 = -Math.PI / 2;\n\n    var _roll2 = 0;\n    return new Vector3(_pitch2, _roll2, _yaw2);\n  }\n\n  var sqx = x * x;\n  var sqy = y * y;\n  var sqz = z * z;\n  var yaw = Math.atan2(2 * y * w - 2 * x * z, 1 - 2 * sqy - 2 * sqz);\n  var pitch = Math.asin(2 * test);\n  var roll = Math.atan2(2 * x * w - 2 * y * z, 1 - 2 * sqx - 2 * sqz);\n  return new Vector3(pitch, roll, yaw);\n}\n\nvar OrbitOrientationControls = /*#__PURE__*/function () {\n  function OrbitOrientationControls(options) {\n    this.object = options.camera;\n    this.domElement = options.canvas;\n    this.orbit = new OrbitControls(this.object, this.domElement);\n    this.speed = 0.5;\n    this.orbit.target.set(0, 1, -1);\n    this.orbit.enableZoom = true;\n    this.orbit.enablePan = false;\n    this.orbit.rotateSpeed = -this.speed; // if orientation is supported\n\n    if (options.orientation) {\n      this.orientation = new DeviceOrientationControls(this.object);\n    } // if projection is not full view\n    // limit the rotation angle in order to not display back half view\n\n\n    if (options.halfView) {\n      this.orbit.minAzimuthAngle = -Math.PI / 4;\n      this.orbit.maxAzimuthAngle = Math.PI / 4;\n    }\n  }\n\n  var _proto = OrbitOrientationControls.prototype;\n\n  _proto.update = function update() {\n    // orientation updates the camera using quaternions and\n    // orbit updates the camera using angles. They are incompatible\n    // and one update overrides the other. So before\n    // orbit overrides orientation we convert our quaternion changes to\n    // an angle change. Then save the angle into orbit so that\n    // it will take those into account when it updates the camera and overrides\n    // our changes\n    if (this.orientation) {\n      this.orientation.update();\n      var quat = this.orientation.object.quaternion;\n      var currentAngle = Quat2Angle(quat.x, quat.y, quat.z, quat.w); // we also have to store the last angle since quaternions are b\n\n      if (typeof this.lastAngle_ === 'undefined') {\n        this.lastAngle_ = currentAngle;\n      }\n\n      this.orbit.rotateLeft((this.lastAngle_.z - currentAngle.z) * (1 + this.speed));\n      this.orbit.rotateUp((this.lastAngle_.y - currentAngle.y) * (1 + this.speed));\n      this.lastAngle_ = currentAngle;\n    }\n\n    this.orbit.update();\n  };\n\n  _proto.dispose = function dispose() {\n    this.orbit.dispose();\n\n    if (this.orientation) {\n      this.orientation.dispose();\n    }\n  };\n\n  _proto.enable = function enable() {\n    this.orbit.enabled = true;\n    if (this.orientation) this.orientation.enabled = true;\n  };\n\n  _proto.disable = function disable() {\n    this.orbit.enabled = false;\n    if (this.orientation) this.orientation.enabled = false;\n  };\n\n  return OrbitOrientationControls;\n}();\n\n/**\r\n * This class reacts to interactions with the canvas and\r\n * triggers appropriate functionality on the player. Right now\r\n * it does two things:\r\n *\r\n * 1. A `mousedown`/`touchstart` followed by `touchend`/`mouseup` without any\r\n *    `touchmove` or `mousemove` toggles play/pause on the player\r\n * 2. Only moving on/clicking the control bar or toggling play/pause should\r\n *    show the control bar. Moving around the scene in the canvas should not.\r\n */\n\nvar CanvasPlayerControls = /*#__PURE__*/function (_videojs$EventTarget) {\n  _inheritsLoose(CanvasPlayerControls, _videojs$EventTarget);\n\n  function CanvasPlayerControls(player, canvas) {\n    var _this;\n\n    _this = _videojs$EventTarget.call(this) || this;\n    _this.player = player;\n    _this.canvas = canvas;\n    _this.onMoveEnd = videojs.bind(_assertThisInitialized(_this), _this.onMoveEnd);\n    _this.onMoveStart = videojs.bind(_assertThisInitialized(_this), _this.onMoveStart);\n    _this.onMove = videojs.bind(_assertThisInitialized(_this), _this.onMove);\n    _this.onControlBarMove = videojs.bind(_assertThisInitialized(_this), _this.onControlBarMove);\n\n    _this.player.controlBar.on(['mousedown', 'mousemove', 'mouseup', 'touchstart', 'touchmove', 'touchend'], _this.onControlBarMove); // we have to override these here because\n    // video.js listens for user activity on the video element\n    // and makes the user active when the mouse moves.\n    // We don't want that for 3d videos\n\n\n    _this.oldReportUserActivity = _this.player.reportUserActivity;\n\n    _this.player.reportUserActivity = function () {}; // canvas movements\n\n\n    _this.canvas.addEventListener('mousedown', _this.onMoveStart);\n\n    _this.canvas.addEventListener('touchstart', _this.onMoveStart);\n\n    _this.canvas.addEventListener('mousemove', _this.onMove);\n\n    _this.canvas.addEventListener('touchmove', _this.onMove);\n\n    _this.canvas.addEventListener('mouseup', _this.onMoveEnd);\n\n    _this.canvas.addEventListener('touchend', _this.onMoveEnd);\n\n    _this.shouldTogglePlay = false;\n    return _this;\n  }\n\n  var _proto = CanvasPlayerControls.prototype;\n\n  _proto.togglePlay = function togglePlay() {\n    this.trigger('vrtoggleplay');\n  };\n\n  _proto.onMoveStart = function onMoveStart(e) {\n    // if the player does not have a controlbar or\n    // the move was a mouse click but not left click do not\n    // toggle play.\n    if (!this.player.controls() || e.type === 'mousedown' && !videojs.dom.isSingleLeftClick(e)) {\n      this.shouldTogglePlay = false;\n      return;\n    }\n\n    this.shouldTogglePlay = true;\n    this.touchMoveCount_ = 0;\n  };\n\n  _proto.onMoveEnd = function onMoveEnd(e) {\n    // We want to have the same behavior in VR360 Player and standar player.\n    // in touchend we want to know if was a touch click, for a click we show the bar,\n    // otherwise continue with the mouse logic.\n    //\n    // Maximum movement allowed during a touch event to still be considered a tap\n    // Other popular libs use anywhere from 2 (hammer.js) to 15,\n    // so 10 seems like a nice, round number.\n    if (e.type === 'touchend' && this.touchMoveCount_ < 10) {\n      if (this.player.userActive() === false) {\n        this.player.userActive(true);\n        return;\n      }\n\n      this.player.userActive(false);\n      return;\n    }\n\n    if (!this.shouldTogglePlay) {\n      return;\n    } // We want the same behavior in Desktop for VR360  and standar player\n\n\n    if (e.type === 'mouseup') {\n      this.togglePlay();\n    }\n  };\n\n  _proto.onMove = function onMove(e) {\n    // Increase touchMoveCount_ since Android detects 1 - 6 touches when user click normaly\n    this.touchMoveCount_++;\n    this.shouldTogglePlay = false;\n  };\n\n  _proto.onControlBarMove = function onControlBarMove(e) {\n    this.player.userActive(true);\n  };\n\n  _proto.dispose = function dispose() {\n    this.canvas.removeEventListener('mousedown', this.onMoveStart);\n    this.canvas.removeEventListener('touchstart', this.onMoveStart);\n    this.canvas.removeEventListener('mousemove', this.onMove);\n    this.canvas.removeEventListener('touchmove', this.onMove);\n    this.canvas.removeEventListener('mouseup', this.onMoveEnd);\n    this.canvas.removeEventListener('touchend', this.onMoveEnd);\n    this.player.controlBar.off(['mousedown', 'mousemove', 'mouseup', 'touchstart', 'touchmove', 'touchend'], this.onControlBarMove);\n    this.player.reportUserActivity = this.oldReportUserActivity;\n  };\n\n  return CanvasPlayerControls;\n}(videojs.EventTarget);\n\nvar BigPlayButton = videojs.getComponent('BigPlayButton');\n\nvar BigVrPlayButton = /*#__PURE__*/function (_BigPlayButton) {\n  _inheritsLoose(BigVrPlayButton, _BigPlayButton);\n\n  function BigVrPlayButton() {\n    return _BigPlayButton.apply(this, arguments) || this;\n  }\n\n  var _proto = BigVrPlayButton.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-big-vr-play-button \" + _BigPlayButton.prototype.buildCSSClass.call(this);\n  };\n\n  return BigVrPlayButton;\n}(BigPlayButton);\n\nvideojs.registerComponent('BigVrPlayButton', BigVrPlayButton);\n\nvar Button = videojs.getComponent('Button');\n\nvar CardboardButton = /*#__PURE__*/function (_Button) {\n  _inheritsLoose(CardboardButton, _Button);\n\n  function CardboardButton(player, options) {\n    return _Button.call(this, player, options) || this; // this.handleVrDisplayActivate_ = videojs.bind(this, this.handleVrDisplayActivate_);\n    // this.handleVrDisplayDeactivate_ = videojs.bind(this, this.handleVrDisplayDeactivate_);\n    // this.handleVrDisplayPresentChange_ = videojs.bind(this, this.handleVrDisplayPresentChange_);\n    // this.handleOrientationChange_ = videojs.bind(this, this.handleOrientationChange_);\n    // window.addEventListener('orientationchange', this.handleOrientationChange_);\n    // window.addEventListener('vrdisplayactivate', this.handleVrDisplayActivate_);\n    // window.addEventListener('vrdisplaydeactivate', this.handleVrDisplayDeactivate_);\n    // vrdisplaypresentchange does not fire activate or deactivate\n    // and happens when hitting the back button during cardboard mode\n    // so we need to make sure we stay in the correct state by\n    // listening to it and checking if we are presenting it or not\n    // window.addEventListener('vrdisplaypresentchange', this.handleVrDisplayPresentChange_);\n    // we cannot show the cardboard button in fullscreen on\n    // android as it breaks the controls, and makes it impossible\n    // to exit cardboard mode\n    // if (videojs.browser.IS_ANDROID) {\n    //   this.on(player, 'fullscreenchange', () => {\n    //     if (player.isFullscreen()) {\n    //       this.hide();\n    //     } else {\n    //       this.show();\n    //     }\n    //   });\n    // }\n  }\n\n  var _proto = CardboardButton.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-button-vr \" + _Button.prototype.buildCSSClass.call(this);\n  } //   handleVrDisplayPresentChange_() {\n  //     if (!this.player_.vr().vrDisplay.isPresenting && this.active_) {\n  //       this.handleVrDisplayDeactivate_();\n  //     }\n  //     if (this.player_.vr().vrDisplay.isPresenting && !this.active_) {\n  //       this.handleVrDisplayActivate_();\n  //     }\n  //   }\n  //   handleOrientationChange_() {\n  //     if (this.active_ && videojs.browser.IS_IOS) {\n  //       this.changeSize_();\n  //     }\n  //   }\n  //   changeSize_() {\n  //     this.player_.width(window.innerWidth);\n  //     this.player_.height(window.innerHeight);\n  //     window.dispatchEvent(new window.Event('resize'));\n  //   }\n  //   handleVrDisplayActivate_() {\n  //     // we mimic fullscreen on IOS\n  //     if (videojs.browser.IS_IOS) {\n  //       this.oldWidth_ = this.player_.currentWidth();\n  //       this.oldHeight_ = this.player_.currentHeight();\n  //       this.player_.enterFullWindow();\n  //       this.changeSize_();\n  //     }\n  //     this.active_ = true;\n  //   }\n  //   handleVrDisplayDeactivate_() {\n  //     // un-mimic fullscreen on iOS\n  //     if (videojs.browser.IS_IOS) {\n  //       if (this.oldWidth_) {\n  //         this.player_.width(this.oldWidth_);\n  //       }\n  //       if (this.oldHeight_) {\n  //         this.player_.height(this.oldHeight_);\n  //       }\n  //       this.player_.exitFullWindow();\n  //     }\n  //     this.active_ = false;\n  //   }\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    // if cardboard mode display is not active, activate it\n    // otherwise deactivate it\n    if (!this.active_) {\n      // This starts playback mode when the cardboard button\n      // is clicked on Andriod. We need to do this as the controls\n      // disappear\n      //   if (!this.player_.hasStarted() && videojs.browser.IS_ANDROID) {\n      //     this.player_.play();\n      //   }\n      window$1.dispatchEvent(new window$1.Event('vrdisplayactivate'));\n      this.active_ = true;\n    } else {\n      window$1.dispatchEvent(new window$1.Event('vrdisplaydeactivate'));\n      this.active_ = false;\n    }\n  };\n\n  _proto.dispose = function dispose() {\n    _Button.prototype.dispose.call(this); // window.removeEventListener('vrdisplayactivate', this.handleVrDisplayActivate_);\n    // window.removeEventListener('vrdisplaydeactivate', this.handleVrDisplayDeactivate_);\n    // window.removeEventListener('vrdisplaypresentchange', this.handleVrDisplayPresentChange_);\n\n  };\n\n  return CardboardButton;\n}(Button);\n\nvideojs.registerComponent('CardboardButton', CardboardButton);\n\nvar Plugin = videojs.getPlugin('plugin'); // Default options for the plugin.\n\nvar defaults = {};\n\nvar Xr = /*#__PURE__*/function (_Plugin) {\n  _inheritsLoose(Xr, _Plugin);\n\n  /**\n   * Create a Xr plugin instance.\n   *\n   * @param  {Player} player\n   *         A Video.js Player instance.\n   *\n   * @param  {Object} [options]\n   *         An optional options object.\n   *\n   *         While not a core part of the Video.js plugin architecture, a\n   *         second argument of options is a convenient way to accept inputs\n   *         from your plugin's caller.\n   */\n  function Xr(player, options) {\n    var _this;\n\n    // the parent class will add player under this.player\n    _this = _Plugin.call(this, player) || this;\n    _this.options = videojs.mergeOptions(defaults, options);\n    _this.bigPlayButtonIndex_ = player.children().indexOf(player.getChild('BigPlayButton')) || 0;\n    if (!navigator.xr) _this.polyfill_ = new WebXRPolyfill();\n    _this.handleVrDisplayActivate_ = videojs.bind(_assertThisInitialized(_this), _this.handleVrDisplayActivate_);\n    _this.handleVrDisplayDeactivate_ = videojs.bind(_assertThisInitialized(_this), _this.handleVrDisplayDeactivate_);\n    _this.onXRSessionEnd_ = videojs.bind(_assertThisInitialized(_this), _this.onXRSessionEnd_);\n    _this.handleResize_ = videojs.bind(_assertThisInitialized(_this), _this.handleResize_);\n    _this.animate_ = videojs.bind(_assertThisInitialized(_this), _this.animate_);\n    _this.currentSession = null;\n\n    _this.on(player, 'loadedmetadata', _this.init);\n\n    _this.player.ready(function () {\n      _this.player.addClass('vjs-xr');\n    });\n\n    return _this;\n  }\n\n  var _proto = Xr.prototype;\n\n  _proto.handleVrDisplayActivate_ = function handleVrDisplayActivate_() {\n    if (!this.xrSupported) return;\n    var self = this;\n    var sessionInit = {\n      optionalFeatures: ['local-floor']\n    };\n    navigator.xr.requestSession('immersive-vr', sessionInit).then(function (session) {\n      self.renderer.xr.setSession(session);\n      session.addEventListener('end', self.onXRSessionEnd_);\n      self.xrActive = true;\n      self.currentSession = session;\n      session.requestReferenceSpace('local').then(function (referenceSpace) {\n        self.xrReferenceSpace = referenceSpace;\n      });\n      self.controls3d.disable();\n      self.trigger('xrSessionActivated');\n      self.animationFrameId_ = self.requestAnimationFrame(self.animate_);\n    });\n  };\n\n  _proto.handleVrDisplayDeactivate_ = function handleVrDisplayDeactivate_() {\n    this.currentSession.end();\n  };\n\n  _proto.onXRSessionEnd_ = function onXRSessionEnd_() {\n    if (this.animationFrameId_) {\n      this.currentSession.cancelAnimationFrame(this.animationFrameId_);\n      this.animationFrameId_ = 0;\n    }\n\n    this.currentSession = null;\n    this.xrActive = false;\n    this.controls3d.enable();\n    this.trigger('xrSessionDeactivated');\n    this.animationFrameId_ = this.requestAnimationFrame(this.animate_);\n  };\n\n  _proto.requestAnimationFrame = function requestAnimationFrame(fn) {\n    if (this.xrActive) return this.currentSession.requestAnimationFrame(fn);else return this.player.requestAnimationFrame(fn);\n  };\n\n  _proto.cancelAnimationFrame = function cancelAnimationFrame(id) {\n    return this.player.cancelAnimationFrame(id);\n  };\n\n  _proto.togglePlay_ = function togglePlay_() {\n    if (this.player.paused()) {\n      this.player.play();\n    } else {\n      this.player.pause();\n    }\n  };\n\n  _proto.animate_ = function animate_(xrTimestamp, xrFrame) {\n    if (!this.initialized_) {\n      return;\n    }\n\n    if (this.getVideoEl_().readyState === this.getVideoEl_().HAVE_ENOUGH_DATA) {\n      if (this.videoTexture) {\n        this.videoTexture.needsUpdate = true;\n      }\n    }\n\n    if (!this.xrActive) this.controls3d.update();\n\n    if (this.xrActive && xrFrame) {\n      this.xrPose = xrFrame.getViewerPose(this.xrReferenceSpace);\n      this.trigger('xrCameraUpdate');\n    }\n\n    this.camera.getWorldDirection(this.cameraVector);\n    this.animationFrameId_ = this.requestAnimationFrame(this.animate_);\n    this.renderer.render(this.scene, this.camera);\n  };\n\n  _proto.handleResize_ = function handleResize_() {\n    var width = this.player.currentWidth();\n    var height = this.player.currentHeight();\n    this.camera.aspect = width / height;\n    this.camera.updateProjectionMatrix();\n  };\n\n  _proto.init = function init() {\n    this.reset();\n    this.xrSupported = false;\n    this.camera = new PerspectiveCamera(75, this.player.currentWidth() / this.player.currentHeight(), 1, 1000); // Store vector representing the direction in which the camera is looking, in world space.\n\n    this.cameraVector = new Vector3();\n    this.camera.layers.enable(1);\n    this.scene = new Scene();\n    this.videoTexture = new VideoTexture(this.getVideoEl_()); // shared regardless of wether VideoTexture is used or\n    // an image canvas is used\n\n    this.videoTexture.generateMipmaps = false;\n    this.videoTexture.minFilter = LinearFilter;\n    this.videoTexture.magFilter = LinearFilter;\n    this.videoTexture.format = RGBFormat;\n    var position = {\n      x: 0,\n      y: 0,\n      z: 0\n    };\n\n    if (this.scene) {\n      this.scene.remove(this.movieScreen);\n    } // 360 equirectangular projection\n\n\n    this.movieGeometry = new SphereBufferGeometry(256, 32, 32);\n    this.movieMaterial = new MeshBasicMaterial({\n      map: this.videoTexture,\n      side: BackSide\n    });\n    this.movieScreen = new Mesh(this.movieGeometry, this.movieMaterial);\n    this.movieScreen.position.set(position.x, position.y, position.z);\n    this.movieScreen.scale.x = -1;\n    this.movieScreen.quaternion.setFromAxisAngle({\n      x: 0,\n      y: 1,\n      z: 0\n    }, -Math.PI / 2);\n    this.scene.add(this.movieScreen);\n    this.player.removeChild('BigPlayButton');\n    this.player.addChild('BigVrPlayButton', {}, this.bigPlayButtonIndex_);\n    this.player.bigPlayButton = this.player.getChild('BigVrPlayButton');\n    this.camera.position.set(0, 0, 0);\n    this.renderer = new WebGLRenderer({\n      devicePixelRatio: window.devicePixelRatio,\n      alpha: false,\n      clearColor: 0xffffff,\n      antialias: true\n    });\n    this.renderer.setSize(this.player.currentWidth(), this.player.currentHeight());\n    this.renderedCanvas = this.renderer.domElement;\n    this.renderedCanvas.setAttribute('style', 'width: 100%; height: 100%; position: absolute; top:0;');\n    var videoElStyle = this.getVideoEl_().style;\n    this.player.el().insertBefore(this.renderedCanvas, this.player.el().firstChild);\n    videoElStyle.zIndex = '-1';\n    videoElStyle.opacity = '0';\n    this.xrActive = false;\n\n    if (!this.controls3d) {\n      // self.controls3d = new OrbitControls(self.camera, self.renderedCanvas);\n      var options = {\n        camera: this.camera,\n        canvas: this.renderedCanvas,\n        // check if its a half sphere view projection\n        halfView: false,\n        orientation: false\n      };\n      this.controls3d = new OrbitOrientationControls(options);\n      this.canvasPlayerControls = new CanvasPlayerControls(this.player, this.renderedCanvas);\n    }\n\n    if (window.navigator.xr) {\n      this.renderer.xr.enabled = true; // this.renderer.xr.setReferenceSpaceType('local');\n\n      var self = this;\n      navigator.xr.isSessionSupported('immersive-vr').then(function (supported) {\n        self.xrSupported = supported;\n\n        if (supported) {\n          self.addCardboardButton_();\n          console.log('webxr session supported');\n        } else {\n          console.log('web xr device not found, using orbit controls');\n        }\n      });\n    } else {\n      console.log('web xr not available');\n    }\n\n    self.completeInitialization(); // wait until controls are initialized\n\n    this.animationFrameId_ = this.requestAnimationFrame(this.animate_);\n    this.on(this.player, 'fullscreenchange', this.handleResize_);\n    window.addEventListener('vrdisplaypresentchange', this.handleResize_, true);\n    window.addEventListener('resize', this.handleResize_, true); // these are triggered by the carboard button:\n\n    window.addEventListener('vrdisplayactivate', this.handleVrDisplayActivate_, true);\n    window.addEventListener('vrdisplaydeactivate', this.handleVrDisplayDeactivate_, true);\n  };\n\n  _proto.completeInitialization = function completeInitialization() {\n    this.initialized_ = true;\n    this.trigger('initialized');\n  };\n\n  _proto.addCardboardButton_ = function addCardboardButton_() {\n    if (!this.player.controlBar.getChild('CardboardButton')) {\n      this.player.controlBar.addChild('CardboardButton', {});\n    }\n  };\n\n  _proto.getVideoEl_ = function getVideoEl_() {\n    return this.player.el().getElementsByTagName('video')[0];\n  };\n\n  _proto.reset = function reset() {\n    if (!this.initialized_) {\n      return;\n    }\n\n    if (this.controls3d) {\n      this.controls3d.dispose();\n      this.controls3d = null;\n    }\n\n    if (this.canvasPlayerControls) {\n      this.canvasPlayerControls.dispose();\n      this.canvasPlayerControls = null;\n    }\n\n    window.removeEventListener('resize', this.handleResize_, true);\n    window.removeEventListener('vrdisplaypresentchange', this.handleResize_, true);\n    window.removeEventListener('vrdisplayactivate', this.handleVrDisplayActivate_, true);\n    window.removeEventListener('vrdisplaydeactivate', this.handleVrDisplayDeactivate_, true); // re-add the big play button to player\n\n    if (!this.player.getChild('BigPlayButton')) {\n      this.player.addChild('BigPlayButton', {}, this.bigPlayButtonIndex_);\n    }\n\n    if (this.player.getChild('BigVrPlayButton')) {\n      this.player.removeChild('BigVrPlayButton');\n    } // remove the cardboard button\n\n\n    if (this.player.getChild('CardboardButton')) {\n      this.player.controlBar.removeChild('CardboardButton');\n    } // reset the video element style so that it will be displayed\n\n\n    var videoElStyle = this.getVideoEl_().style;\n    videoElStyle.zIndex = '';\n    videoElStyle.opacity = ''; // remove the old canvas\n\n    if (this.renderedCanvas) {\n      this.renderedCanvas.parentNode.removeChild(this.renderedCanvas);\n    }\n\n    if (this.animationFrameId_) {\n      this.cancelAnimationFrame(this.animationFrameId_);\n    }\n\n    this.initialized_ = false;\n  };\n\n  _proto.dispose = function dispose() {\n    this.reset();\n\n    _Plugin.prototype.dispose.call(this);\n  };\n\n  _proto.polyfillVersion = function polyfillVersion() {\n    return WebXRPolyfill.version;\n  };\n\n  return Xr;\n}(Plugin); // Define default values for the plugin's `state` object here.\n\n\nXr.defaultState = {}; // Include the version number.\n\nXr.VERSION = version; // Register the plugin with video.js.\n\nvideojs.registerPlugin('xr', Xr);\n\nexport default Xr;\n"],"sourceRoot":""}